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
);
3502 parser
->error
= false;
3505 error ("label at end of compound statement");
3506 c_parser_consume_token (parser
);
3509 /* Parse a label (C90 6.6.1, C99 6.8.1).
3512 identifier : attributes[opt]
3513 case constant-expression :
3519 case constant-expression ... constant-expression :
3521 The use of attributes on labels is a GNU extension. The syntax in
3522 GNU C accepts any expressions without commas, non-constant
3523 expressions being rejected later. */
3526 c_parser_label (c_parser
*parser
)
3528 location_t loc1
= c_parser_peek_token (parser
)->location
;
3529 tree label
= NULL_TREE
;
3530 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
3533 c_parser_consume_token (parser
);
3534 exp1
= c_parser_expr_no_commas (parser
, NULL
).value
;
3535 if (c_parser_next_token_is (parser
, CPP_COLON
))
3537 c_parser_consume_token (parser
);
3538 label
= do_case (exp1
, NULL_TREE
);
3540 else if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3542 c_parser_consume_token (parser
);
3543 exp2
= c_parser_expr_no_commas (parser
, NULL
).value
;
3544 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3545 label
= do_case (exp1
, exp2
);
3548 c_parser_error (parser
, "expected %<:%> or %<...%>");
3550 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
3552 c_parser_consume_token (parser
);
3553 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3554 label
= do_case (NULL_TREE
, NULL_TREE
);
3558 tree name
= c_parser_peek_token (parser
)->value
;
3562 gcc_assert (c_parser_next_token_is (parser
, CPP_NAME
));
3563 c_parser_consume_token (parser
);
3564 gcc_assert (c_parser_next_token_is (parser
, CPP_COLON
));
3565 loc2
= c_parser_peek_token (parser
)->location
;
3566 c_parser_consume_token (parser
);
3567 attrs
= c_parser_attributes (parser
);
3568 tlab
= define_label (loc2
, name
);
3571 decl_attributes (&tlab
, attrs
, 0);
3572 label
= add_stmt (build_stmt (LABEL_EXPR
, tlab
));
3576 SET_EXPR_LOCATION (label
, loc1
);
3579 /* Parse a statement (C90 6.6, C99 6.8).
3584 expression-statement
3592 expression-statement:
3595 selection-statement:
3599 iteration-statement:
3608 return expression[opt] ;
3621 objc-throw-statement
3622 objc-try-catch-statement
3623 objc-synchronized-statement
3625 objc-throw-statement:
3639 parallel-for-construct
3640 parallel-sections-construct
3647 parallel-directive structured-block
3650 for-directive iteration-statement
3653 sections-directive section-scope
3656 single-directive structured-block
3658 parallel-for-construct:
3659 parallel-for-directive iteration-statement
3661 parallel-sections-construct:
3662 parallel-sections-directive section-scope
3665 master-directive structured-block
3668 critical-directive structured-block
3671 atomic-directive expression-statement
3674 ordered-directive structured-block */
3677 c_parser_statement (c_parser
*parser
)
3679 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3680 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3681 || (c_parser_next_token_is (parser
, CPP_NAME
)
3682 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3683 c_parser_label (parser
);
3684 c_parser_statement_after_labels (parser
);
3687 /* Parse a statement, other than a labeled statement. */
3690 c_parser_statement_after_labels (c_parser
*parser
)
3692 location_t loc
= c_parser_peek_token (parser
)->location
;
3693 tree stmt
= NULL_TREE
;
3694 switch (c_parser_peek_token (parser
)->type
)
3696 case CPP_OPEN_BRACE
:
3697 add_stmt (c_parser_compound_statement (parser
));
3700 switch (c_parser_peek_token (parser
)->keyword
)
3703 c_parser_if_statement (parser
);
3706 c_parser_switch_statement (parser
);
3709 c_parser_while_statement (parser
);
3712 c_parser_do_statement (parser
);
3715 c_parser_for_statement (parser
);
3718 c_parser_consume_token (parser
);
3719 if (c_parser_next_token_is (parser
, CPP_NAME
))
3721 stmt
= c_finish_goto_label (c_parser_peek_token (parser
)->value
);
3722 c_parser_consume_token (parser
);
3724 else if (c_parser_next_token_is (parser
, CPP_MULT
))
3726 c_parser_consume_token (parser
);
3727 stmt
= c_finish_goto_ptr (c_parser_expression (parser
).value
);
3730 c_parser_error (parser
, "expected identifier or %<*%>");
3731 goto expect_semicolon
;
3733 c_parser_consume_token (parser
);
3734 stmt
= c_finish_bc_stmt (&c_cont_label
, false);
3735 goto expect_semicolon
;
3737 c_parser_consume_token (parser
);
3738 stmt
= c_finish_bc_stmt (&c_break_label
, true);
3739 goto expect_semicolon
;
3741 c_parser_consume_token (parser
);
3742 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3744 stmt
= c_finish_return (NULL_TREE
);
3745 c_parser_consume_token (parser
);
3749 stmt
= c_finish_return (c_parser_expression_conv (parser
).value
);
3750 goto expect_semicolon
;
3754 stmt
= c_parser_asm_statement (parser
);
3757 gcc_assert (c_dialect_objc ());
3758 c_parser_consume_token (parser
);
3759 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3761 stmt
= objc_build_throw_stmt (NULL_TREE
);
3762 c_parser_consume_token (parser
);
3767 = objc_build_throw_stmt (c_parser_expression (parser
).value
);
3768 goto expect_semicolon
;
3772 gcc_assert (c_dialect_objc ());
3773 c_parser_objc_try_catch_statement (parser
);
3775 case RID_AT_SYNCHRONIZED
:
3776 gcc_assert (c_dialect_objc ());
3777 c_parser_objc_synchronized_statement (parser
);
3784 c_parser_consume_token (parser
);
3786 case CPP_CLOSE_PAREN
:
3787 case CPP_CLOSE_SQUARE
:
3788 /* Avoid infinite loop in error recovery:
3789 c_parser_skip_until_found stops at a closing nesting
3790 delimiter without consuming it, but here we need to consume
3791 it to proceed further. */
3792 c_parser_error (parser
, "expected statement");
3793 c_parser_consume_token (parser
);
3796 c_parser_pragma (parser
, pragma_stmt
);
3800 stmt
= c_finish_expr_stmt (c_parser_expression_conv (parser
).value
);
3802 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3805 /* Two cases cannot and do not have line numbers associated: If stmt
3806 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3807 cannot hold line numbers. But that's OK because the statement
3808 will either be changed to a MODIFY_EXPR during gimplification of
3809 the statement expr, or discarded. If stmt was compound, but
3810 without new variables, we will have skipped the creation of a
3811 BIND and will have a bare STATEMENT_LIST. But that's OK because
3812 (recursively) all of the component statements should already have
3813 line numbers assigned. ??? Can we discard no-op statements
3815 if (stmt
&& EXPR_P (stmt
))
3816 SET_EXPR_LOCATION (stmt
, loc
);
3819 /* Parse a parenthesized condition from an if, do or while statement.
3825 c_parser_paren_condition (c_parser
*parser
)
3829 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3830 return error_mark_node
;
3831 loc
= c_parser_peek_token (parser
)->location
;
3832 cond
= c_objc_common_truthvalue_conversion
3833 (c_parser_expression_conv (parser
).value
);
3835 SET_EXPR_LOCATION (cond
, loc
);
3836 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3840 /* Parse a statement which is a block in C99. */
3843 c_parser_c99_block_statement (c_parser
*parser
)
3845 tree block
= c_begin_compound_stmt (flag_isoc99
);
3846 c_parser_statement (parser
);
3847 return c_end_compound_stmt (block
, flag_isoc99
);
3850 /* Parse the body of an if statement or the else half thereof. This
3851 is just parsing a statement but (a) it is a block in C99, (b) we
3852 track whether the body is an if statement for the sake of
3853 -Wparentheses warnings, (c) we handle an empty body specially for
3854 the sake of -Wextra warnings. */
3857 c_parser_if_body (c_parser
*parser
, bool *if_p
)
3859 tree block
= c_begin_compound_stmt (flag_isoc99
);
3860 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3861 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3862 || (c_parser_next_token_is (parser
, CPP_NAME
)
3863 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3864 c_parser_label (parser
);
3865 *if_p
= c_parser_next_token_is_keyword (parser
, RID_IF
);
3866 if (extra_warnings
&& c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3867 add_stmt (build_empty_stmt ());
3868 c_parser_statement_after_labels (parser
);
3869 return c_end_compound_stmt (block
, flag_isoc99
);
3872 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3875 if ( expression ) statement
3876 if ( expression ) statement else statement
3880 c_parser_if_statement (c_parser
*parser
)
3885 bool first_if
= false, second_if
= false;
3886 tree first_body
, second_body
;
3887 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_IF
));
3888 c_parser_consume_token (parser
);
3889 block
= c_begin_compound_stmt (flag_isoc99
);
3890 loc
= c_parser_peek_token (parser
)->location
;
3891 cond
= c_parser_paren_condition (parser
);
3892 first_body
= c_parser_if_body (parser
, &first_if
);
3893 if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3895 c_parser_consume_token (parser
);
3896 second_body
= c_parser_if_body (parser
, &second_if
);
3899 second_body
= NULL_TREE
;
3900 c_finish_if_stmt (loc
, cond
, first_body
, second_body
, first_if
);
3901 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3904 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3907 switch (expression) statement
3911 c_parser_switch_statement (c_parser
*parser
)
3913 tree block
, expr
, body
, save_break
;
3914 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SWITCH
));
3915 c_parser_consume_token (parser
);
3916 block
= c_begin_compound_stmt (flag_isoc99
);
3917 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3919 expr
= c_parser_expression (parser
).value
;
3920 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3923 expr
= error_mark_node
;
3924 c_start_case (expr
);
3925 save_break
= c_break_label
;
3926 c_break_label
= NULL_TREE
;
3927 body
= c_parser_c99_block_statement (parser
);
3928 c_finish_case (body
);
3930 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_break_label
));
3931 c_break_label
= save_break
;
3932 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3935 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
3938 while (expression) statement
3942 c_parser_while_statement (c_parser
*parser
)
3944 tree block
, cond
, body
, save_break
, save_cont
;
3946 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_WHILE
));
3947 c_parser_consume_token (parser
);
3948 block
= c_begin_compound_stmt (flag_isoc99
);
3949 loc
= c_parser_peek_token (parser
)->location
;
3950 cond
= c_parser_paren_condition (parser
);
3951 save_break
= c_break_label
;
3952 c_break_label
= NULL_TREE
;
3953 save_cont
= c_cont_label
;
3954 c_cont_label
= NULL_TREE
;
3955 body
= c_parser_c99_block_statement (parser
);
3956 c_finish_loop (loc
, cond
, NULL
, body
, c_break_label
, c_cont_label
, true);
3957 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3958 c_break_label
= save_break
;
3959 c_cont_label
= save_cont
;
3962 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
3965 do statement while ( expression ) ;
3969 c_parser_do_statement (c_parser
*parser
)
3971 tree block
, cond
, body
, save_break
, save_cont
, new_break
, new_cont
;
3973 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_DO
));
3974 c_parser_consume_token (parser
);
3975 block
= c_begin_compound_stmt (flag_isoc99
);
3976 loc
= c_parser_peek_token (parser
)->location
;
3977 save_break
= c_break_label
;
3978 c_break_label
= NULL_TREE
;
3979 save_cont
= c_cont_label
;
3980 c_cont_label
= NULL_TREE
;
3981 body
= c_parser_c99_block_statement (parser
);
3982 c_parser_require_keyword (parser
, RID_WHILE
, "expected %<while%>");
3983 new_break
= c_break_label
;
3984 c_break_label
= save_break
;
3985 new_cont
= c_cont_label
;
3986 c_cont_label
= save_cont
;
3987 cond
= c_parser_paren_condition (parser
);
3988 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
3989 c_parser_skip_to_end_of_block_or_statement (parser
);
3990 c_finish_loop (loc
, cond
, NULL
, body
, new_break
, new_cont
, false);
3991 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3994 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
3997 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
3998 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4000 The form with a declaration is new in C99.
4002 ??? In accordance with the old parser, the declaration may be a
4003 nested function, which is then rejected in check_for_loop_decls,
4004 but does it make any sense for this to be included in the grammar?
4005 Note in particular that the nested function does not include a
4006 trailing ';', whereas the "declaration" production includes one.
4007 Also, can we reject bad declarations earlier and cheaper than
4008 check_for_loop_decls? */
4011 c_parser_for_statement (c_parser
*parser
)
4013 tree block
, cond
, incr
, save_break
, save_cont
, body
;
4015 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_FOR
));
4016 loc
= c_parser_peek_token (parser
)->location
;
4017 c_parser_consume_token (parser
);
4018 block
= c_begin_compound_stmt (flag_isoc99
);
4019 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4021 /* Parse the initialization declaration or expression. */
4022 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4024 c_parser_consume_token (parser
);
4025 c_finish_expr_stmt (NULL_TREE
);
4027 else if (c_parser_next_token_starts_declspecs (parser
))
4029 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4030 check_for_loop_decls ();
4032 else if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4034 /* __extension__ can start a declaration, but is also an
4035 unary operator that can start an expression. Consume all
4036 but the last of a possible series of __extension__ to
4038 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4039 && (c_parser_peek_2nd_token (parser
)->keyword
4041 c_parser_consume_token (parser
);
4042 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
4045 ext
= disable_extension_diagnostics ();
4046 c_parser_consume_token (parser
);
4047 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4048 restore_extension_diagnostics (ext
);
4049 check_for_loop_decls ();
4057 c_finish_expr_stmt (c_parser_expression (parser
).value
);
4058 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4060 /* Parse the loop condition. */
4061 loc
= c_parser_peek_token (parser
)->location
;
4062 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4064 c_parser_consume_token (parser
);
4069 tree ocond
= c_parser_expression_conv (parser
).value
;
4070 cond
= c_objc_common_truthvalue_conversion (ocond
);
4072 SET_EXPR_LOCATION (cond
, loc
);
4073 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4075 /* Parse the increment expression. */
4076 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4077 incr
= c_process_expr_stmt (NULL_TREE
);
4079 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
4080 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4084 cond
= error_mark_node
;
4085 incr
= error_mark_node
;
4087 save_break
= c_break_label
;
4088 c_break_label
= NULL_TREE
;
4089 save_cont
= c_cont_label
;
4090 c_cont_label
= NULL_TREE
;
4091 body
= c_parser_c99_block_statement (parser
);
4092 c_finish_loop (loc
, cond
, incr
, body
, c_break_label
, c_cont_label
, true);
4093 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4094 c_break_label
= save_break
;
4095 c_cont_label
= save_cont
;
4098 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4099 statement with inputs, outputs, clobbers, and volatile tag
4103 asm type-qualifier[opt] ( asm-argument ) ;
4107 asm-string-literal : asm-operands[opt]
4108 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4109 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4111 Qualifiers other than volatile are accepted in the syntax but
4115 c_parser_asm_statement (c_parser
*parser
)
4117 tree quals
, str
, outputs
, inputs
, clobbers
, ret
;
4119 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
4120 c_parser_consume_token (parser
);
4121 if (c_parser_next_token_is_keyword (parser
, RID_VOLATILE
))
4123 quals
= c_parser_peek_token (parser
)->value
;
4124 c_parser_consume_token (parser
);
4126 else if (c_parser_next_token_is_keyword (parser
, RID_CONST
)
4127 || c_parser_next_token_is_keyword (parser
, RID_RESTRICT
))
4129 warning (0, "%E qualifier ignored on asm",
4130 c_parser_peek_token (parser
)->value
);
4132 c_parser_consume_token (parser
);
4136 /* ??? Follow the C++ parser rather than using the
4137 c_lex_string_translate kludge. */
4138 c_lex_string_translate
= 0;
4139 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4141 c_lex_string_translate
= 1;
4144 str
= c_parser_asm_string_literal (parser
);
4145 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4148 outputs
= NULL_TREE
;
4150 clobbers
= NULL_TREE
;
4153 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4155 c_lex_string_translate
= 1;
4156 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4160 /* Parse outputs. */
4161 if (c_parser_next_token_is (parser
, CPP_COLON
)
4162 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4163 outputs
= NULL_TREE
;
4165 outputs
= c_parser_asm_operands (parser
, false);
4166 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4169 clobbers
= NULL_TREE
;
4172 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4174 c_lex_string_translate
= 1;
4175 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4179 if (c_parser_next_token_is (parser
, CPP_COLON
)
4180 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4183 inputs
= c_parser_asm_operands (parser
, true);
4184 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4186 clobbers
= NULL_TREE
;
4189 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4191 c_lex_string_translate
= 1;
4192 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4195 /* Parse clobbers. */
4196 clobbers
= c_parser_asm_clobbers (parser
);
4198 c_lex_string_translate
= 1;
4199 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4201 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4204 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4205 c_parser_skip_to_end_of_block_or_statement (parser
);
4206 ret
= build_asm_stmt (quals
, build_asm_expr (str
, outputs
, inputs
,
4211 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4212 not outputs), apply the default conversion of functions and arrays
4217 asm-operands , asm-operand
4220 asm-string-literal ( expression )
4221 [ identifier ] asm-string-literal ( expression )
4225 c_parser_asm_operands (c_parser
*parser
, bool convert_p
)
4227 tree list
= NULL_TREE
;
4232 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
4234 c_parser_consume_token (parser
);
4235 if (c_parser_next_token_is (parser
, CPP_NAME
))
4237 tree id
= c_parser_peek_token (parser
)->value
;
4238 c_parser_consume_token (parser
);
4239 name
= build_string (IDENTIFIER_LENGTH (id
),
4240 IDENTIFIER_POINTER (id
));
4244 c_parser_error (parser
, "expected identifier");
4245 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, NULL
);
4248 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
4253 str
= c_parser_asm_string_literal (parser
);
4254 if (str
== NULL_TREE
)
4256 c_lex_string_translate
= 1;
4257 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4259 c_lex_string_translate
= 0;
4262 expr
= c_parser_expression (parser
);
4264 expr
= default_function_array_conversion (expr
);
4265 c_lex_string_translate
= 0;
4266 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4268 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4271 list
= chainon (list
, build_tree_list (build_tree_list (name
, str
),
4273 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4274 c_parser_consume_token (parser
);
4281 /* Parse asm clobbers, a GNU extension.
4285 asm-clobbers , asm-string-literal
4289 c_parser_asm_clobbers (c_parser
*parser
)
4291 tree list
= NULL_TREE
;
4294 tree str
= c_parser_asm_string_literal (parser
);
4296 list
= tree_cons (NULL_TREE
, str
, list
);
4299 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4300 c_parser_consume_token (parser
);
4307 /* Parse an expression other than a compound expression; that is, an
4308 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4309 NULL then it is an Objective-C message expression which is the
4310 primary-expression starting the expression as an initializer.
4312 assignment-expression:
4313 conditional-expression
4314 unary-expression assignment-operator assignment-expression
4316 assignment-operator: one of
4317 = *= /= %= += -= <<= >>= &= ^= |=
4319 In GNU C we accept any conditional expression on the LHS and
4320 diagnose the invalid lvalue rather than producing a syntax
4323 static struct c_expr
4324 c_parser_expr_no_commas (c_parser
*parser
, struct c_expr
*after
)
4326 struct c_expr lhs
, rhs
, ret
;
4327 enum tree_code code
;
4328 gcc_assert (!after
|| c_dialect_objc ());
4329 lhs
= c_parser_conditional_expression (parser
, after
);
4330 switch (c_parser_peek_token (parser
)->type
)
4339 code
= TRUNC_DIV_EXPR
;
4342 code
= TRUNC_MOD_EXPR
;
4357 code
= BIT_AND_EXPR
;
4360 code
= BIT_XOR_EXPR
;
4363 code
= BIT_IOR_EXPR
;
4368 c_parser_consume_token (parser
);
4369 rhs
= c_parser_expr_no_commas (parser
, NULL
);
4370 rhs
= default_function_array_conversion (rhs
);
4371 ret
.value
= build_modify_expr (lhs
.value
, code
, rhs
.value
);
4372 if (code
== NOP_EXPR
)
4373 ret
.original_code
= MODIFY_EXPR
;
4376 TREE_NO_WARNING (ret
.value
) = 1;
4377 ret
.original_code
= ERROR_MARK
;
4382 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4383 is not NULL then it is an Objective-C message expression which is
4384 the primary-expression starting the expression as an initializer.
4386 conditional-expression:
4387 logical-OR-expression
4388 logical-OR-expression ? expression : conditional-expression
4392 conditional-expression:
4393 logical-OR-expression ? : conditional-expression
4396 static struct c_expr
4397 c_parser_conditional_expression (c_parser
*parser
, struct c_expr
*after
)
4399 struct c_expr cond
, exp1
, exp2
, ret
;
4400 gcc_assert (!after
|| c_dialect_objc ());
4401 cond
= c_parser_binary_expression (parser
, after
);
4402 if (c_parser_next_token_is_not (parser
, CPP_QUERY
))
4404 cond
= default_function_array_conversion (cond
);
4405 c_parser_consume_token (parser
);
4406 if (c_parser_next_token_is (parser
, CPP_COLON
))
4409 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
4410 /* Make sure first operand is calculated only once. */
4411 exp1
.value
= save_expr (default_conversion (cond
.value
));
4412 cond
.value
= c_objc_common_truthvalue_conversion (exp1
.value
);
4413 skip_evaluation
+= cond
.value
== truthvalue_true_node
;
4418 = c_objc_common_truthvalue_conversion
4419 (default_conversion (cond
.value
));
4420 skip_evaluation
+= cond
.value
== truthvalue_false_node
;
4421 exp1
= c_parser_expression_conv (parser
);
4422 skip_evaluation
+= ((cond
.value
== truthvalue_true_node
)
4423 - (cond
.value
== truthvalue_false_node
));
4425 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4427 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4428 ret
.value
= error_mark_node
;
4429 ret
.original_code
= ERROR_MARK
;
4432 exp2
= c_parser_conditional_expression (parser
, NULL
);
4433 exp2
= default_function_array_conversion (exp2
);
4434 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4435 ret
.value
= build_conditional_expr (cond
.value
, exp1
.value
, exp2
.value
);
4436 ret
.original_code
= ERROR_MARK
;
4440 /* Parse a binary expression; that is, a logical-OR-expression (C90
4441 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4442 an Objective-C message expression which is the primary-expression
4443 starting the expression as an initializer.
4445 multiplicative-expression:
4447 multiplicative-expression * cast-expression
4448 multiplicative-expression / cast-expression
4449 multiplicative-expression % cast-expression
4451 additive-expression:
4452 multiplicative-expression
4453 additive-expression + multiplicative-expression
4454 additive-expression - multiplicative-expression
4458 shift-expression << additive-expression
4459 shift-expression >> additive-expression
4461 relational-expression:
4463 relational-expression < shift-expression
4464 relational-expression > shift-expression
4465 relational-expression <= shift-expression
4466 relational-expression >= shift-expression
4468 equality-expression:
4469 relational-expression
4470 equality-expression == relational-expression
4471 equality-expression != relational-expression
4475 AND-expression & equality-expression
4477 exclusive-OR-expression:
4479 exclusive-OR-expression ^ AND-expression
4481 inclusive-OR-expression:
4482 exclusive-OR-expression
4483 inclusive-OR-expression | exclusive-OR-expression
4485 logical-AND-expression:
4486 inclusive-OR-expression
4487 logical-AND-expression && inclusive-OR-expression
4489 logical-OR-expression:
4490 logical-AND-expression
4491 logical-OR-expression || logical-AND-expression
4494 static struct c_expr
4495 c_parser_binary_expression (c_parser
*parser
, struct c_expr
*after
)
4497 /* A binary expression is parsed using operator-precedence parsing,
4498 with the operands being cast expressions. All the binary
4499 operators are left-associative. Thus a binary expression is of
4502 E0 op1 E1 op2 E2 ...
4504 which we represent on a stack. On the stack, the precedence
4505 levels are strictly increasing. When a new operator is
4506 encountered of higher precedence than that at the top of the
4507 stack, it is pushed; its LHS is the top expression, and its RHS
4508 is everything parsed until it is popped. When a new operator is
4509 encountered with precedence less than or equal to that at the top
4510 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4511 by the result of the operation until the operator at the top of
4512 the stack has lower precedence than the new operator or there is
4513 only one element on the stack; then the top expression is the LHS
4514 of the new operator. In the case of logical AND and OR
4515 expressions, we also need to adjust skip_evaluation as
4516 appropriate when the operators are pushed and popped. */
4518 /* The precedence levels, where 0 is a dummy lowest level used for
4519 the bottom of the stack. */
4535 /* The expression at this stack level. */
4537 /* The precedence of the operator on its left, PREC_NONE at the
4538 bottom of the stack. */
4540 /* The operation on its left. */
4546 switch (stack[sp].op) \
4548 case TRUTH_ANDIF_EXPR: \
4549 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4551 case TRUTH_ORIF_EXPR: \
4552 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4557 stack[sp - 1].expr \
4558 = default_function_array_conversion (stack[sp - 1].expr); \
4560 = default_function_array_conversion (stack[sp].expr); \
4561 stack[sp - 1].expr = parser_build_binary_op (stack[sp].op, \
4562 stack[sp - 1].expr, \
4566 gcc_assert (!after
|| c_dialect_objc ());
4567 stack
[0].expr
= c_parser_cast_expression (parser
, after
);
4568 stack
[0].prec
= PREC_NONE
;
4573 enum tree_code ocode
;
4576 switch (c_parser_peek_token (parser
)->type
)
4584 ocode
= TRUNC_DIV_EXPR
;
4588 ocode
= TRUNC_MOD_EXPR
;
4600 ocode
= LSHIFT_EXPR
;
4604 ocode
= RSHIFT_EXPR
;
4618 case CPP_GREATER_EQ
:
4631 oprec
= PREC_BITAND
;
4632 ocode
= BIT_AND_EXPR
;
4635 oprec
= PREC_BITXOR
;
4636 ocode
= BIT_XOR_EXPR
;
4640 ocode
= BIT_IOR_EXPR
;
4643 oprec
= PREC_LOGAND
;
4644 ocode
= TRUTH_ANDIF_EXPR
;
4648 ocode
= TRUTH_ORIF_EXPR
;
4651 /* Not a binary operator, so end of the binary
4655 c_parser_consume_token (parser
);
4656 while (oprec
<= stack
[sp
].prec
)
4660 case TRUTH_ANDIF_EXPR
:
4662 = default_function_array_conversion (stack
[sp
].expr
);
4663 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4664 (default_conversion (stack
[sp
].expr
.value
));
4665 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_false_node
;
4667 case TRUTH_ORIF_EXPR
:
4669 = default_function_array_conversion (stack
[sp
].expr
);
4670 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4671 (default_conversion (stack
[sp
].expr
.value
));
4672 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_true_node
;
4678 stack
[sp
].expr
= c_parser_cast_expression (parser
, NULL
);
4679 stack
[sp
].prec
= oprec
;
4680 stack
[sp
].op
= ocode
;
4685 return stack
[0].expr
;
4689 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4690 NULL then it is an Objective-C message expression which is the
4691 primary-expression starting the expression as an initializer.
4695 ( type-name ) unary-expression
4698 static struct c_expr
4699 c_parser_cast_expression (c_parser
*parser
, struct c_expr
*after
)
4701 gcc_assert (!after
|| c_dialect_objc ());
4703 return c_parser_postfix_expression_after_primary (parser
, *after
);
4704 /* If the expression begins with a parenthesized type name, it may
4705 be either a cast or a compound literal; we need to see whether
4706 the next character is '{' to tell the difference. If not, it is
4707 an unary expression. */
4708 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4709 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4711 struct c_type_name
*type_name
;
4714 c_parser_consume_token (parser
);
4715 type_name
= c_parser_type_name (parser
);
4716 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4717 if (type_name
== NULL
)
4719 ret
.value
= error_mark_node
;
4720 ret
.original_code
= ERROR_MARK
;
4724 /* Save casted types in the function's used types hash table. */
4725 used_types_insert (type_name
->specs
->type
);
4727 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4728 return c_parser_postfix_expression_after_paren_type (parser
,
4730 expr
= c_parser_cast_expression (parser
, NULL
);
4731 expr
= default_function_array_conversion (expr
);
4732 ret
.value
= c_cast_expr (type_name
, expr
.value
);
4733 ret
.original_code
= ERROR_MARK
;
4737 return c_parser_unary_expression (parser
);
4740 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4746 unary-operator cast-expression
4747 sizeof unary-expression
4748 sizeof ( type-name )
4750 unary-operator: one of
4756 __alignof__ unary-expression
4757 __alignof__ ( type-name )
4760 unary-operator: one of
4761 __extension__ __real__ __imag__
4763 In addition, the GNU syntax treats ++ and -- as unary operators, so
4764 they may be applied to cast expressions with errors for non-lvalues
4767 static struct c_expr
4768 c_parser_unary_expression (c_parser
*parser
)
4771 struct c_expr ret
, op
;
4772 switch (c_parser_peek_token (parser
)->type
)
4775 c_parser_consume_token (parser
);
4776 op
= c_parser_cast_expression (parser
, NULL
);
4777 op
= default_function_array_conversion (op
);
4778 return parser_build_unary_op (PREINCREMENT_EXPR
, op
);
4779 case CPP_MINUS_MINUS
:
4780 c_parser_consume_token (parser
);
4781 op
= c_parser_cast_expression (parser
, NULL
);
4782 op
= default_function_array_conversion (op
);
4783 return parser_build_unary_op (PREDECREMENT_EXPR
, op
);
4785 c_parser_consume_token (parser
);
4786 return parser_build_unary_op (ADDR_EXPR
,
4787 c_parser_cast_expression (parser
, NULL
));
4789 c_parser_consume_token (parser
);
4790 op
= c_parser_cast_expression (parser
, NULL
);
4791 op
= default_function_array_conversion (op
);
4792 ret
.value
= build_indirect_ref (op
.value
, "unary *");
4793 ret
.original_code
= ERROR_MARK
;
4796 c_parser_consume_token (parser
);
4797 if (!c_dialect_objc () && !in_system_header
)
4798 warning (OPT_Wtraditional
,
4799 "traditional C rejects the unary plus operator");
4800 op
= c_parser_cast_expression (parser
, NULL
);
4801 op
= default_function_array_conversion (op
);
4802 return parser_build_unary_op (CONVERT_EXPR
, op
);
4804 c_parser_consume_token (parser
);
4805 op
= c_parser_cast_expression (parser
, NULL
);
4806 op
= default_function_array_conversion (op
);
4807 return parser_build_unary_op (NEGATE_EXPR
, op
);
4809 c_parser_consume_token (parser
);
4810 op
= c_parser_cast_expression (parser
, NULL
);
4811 op
= default_function_array_conversion (op
);
4812 return parser_build_unary_op (BIT_NOT_EXPR
, op
);
4814 c_parser_consume_token (parser
);
4815 op
= c_parser_cast_expression (parser
, NULL
);
4816 op
= default_function_array_conversion (op
);
4817 return parser_build_unary_op (TRUTH_NOT_EXPR
, op
);
4819 /* Refer to the address of a label as a pointer. */
4820 c_parser_consume_token (parser
);
4821 if (c_parser_next_token_is (parser
, CPP_NAME
))
4823 ret
.value
= finish_label_address_expr
4824 (c_parser_peek_token (parser
)->value
);
4825 c_parser_consume_token (parser
);
4829 c_parser_error (parser
, "expected identifier");
4830 ret
.value
= error_mark_node
;
4832 ret
.original_code
= ERROR_MARK
;
4835 switch (c_parser_peek_token (parser
)->keyword
)
4838 return c_parser_sizeof_expression (parser
);
4840 return c_parser_alignof_expression (parser
);
4842 c_parser_consume_token (parser
);
4843 ext
= disable_extension_diagnostics ();
4844 ret
= c_parser_cast_expression (parser
, NULL
);
4845 restore_extension_diagnostics (ext
);
4848 c_parser_consume_token (parser
);
4849 op
= c_parser_cast_expression (parser
, NULL
);
4850 op
= default_function_array_conversion (op
);
4851 return parser_build_unary_op (REALPART_EXPR
, op
);
4853 c_parser_consume_token (parser
);
4854 op
= c_parser_cast_expression (parser
, NULL
);
4855 op
= default_function_array_conversion (op
);
4856 return parser_build_unary_op (IMAGPART_EXPR
, op
);
4858 return c_parser_postfix_expression (parser
);
4861 return c_parser_postfix_expression (parser
);
4865 /* Parse a sizeof expression. */
4867 static struct c_expr
4868 c_parser_sizeof_expression (c_parser
*parser
)
4871 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SIZEOF
));
4872 c_parser_consume_token (parser
);
4875 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4876 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4878 /* Either sizeof ( type-name ) or sizeof unary-expression
4879 starting with a compound literal. */
4880 struct c_type_name
*type_name
;
4881 c_parser_consume_token (parser
);
4882 type_name
= c_parser_type_name (parser
);
4883 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4884 if (type_name
== NULL
)
4889 ret
.value
= error_mark_node
;
4890 ret
.original_code
= ERROR_MARK
;
4893 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4895 expr
= c_parser_postfix_expression_after_paren_type (parser
,
4899 /* sizeof ( type-name ). */
4902 if (type_name
->declarator
->kind
== cdk_array
4903 && type_name
->declarator
->u
.array
.vla_unspec_p
)
4906 error ("%<[*]%> not allowed in other than a declaration");
4908 return c_expr_sizeof_type (type_name
);
4912 expr
= c_parser_unary_expression (parser
);
4916 if (TREE_CODE (expr
.value
) == COMPONENT_REF
4917 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
4918 error ("%<sizeof%> applied to a bit-field");
4919 return c_expr_sizeof_expr (expr
);
4923 /* Parse an alignof expression. */
4925 static struct c_expr
4926 c_parser_alignof_expression (c_parser
*parser
)
4929 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNOF
));
4930 c_parser_consume_token (parser
);
4933 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4934 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4936 /* Either __alignof__ ( type-name ) or __alignof__
4937 unary-expression starting with a compound literal. */
4938 struct c_type_name
*type_name
;
4940 c_parser_consume_token (parser
);
4941 type_name
= c_parser_type_name (parser
);
4942 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4943 if (type_name
== NULL
)
4948 ret
.value
= error_mark_node
;
4949 ret
.original_code
= ERROR_MARK
;
4952 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4954 expr
= c_parser_postfix_expression_after_paren_type (parser
,
4958 /* alignof ( type-name ). */
4961 ret
.value
= c_alignof (groktypename (type_name
));
4962 ret
.original_code
= ERROR_MARK
;
4968 expr
= c_parser_unary_expression (parser
);
4972 ret
.value
= c_alignof_expr (expr
.value
);
4973 ret
.original_code
= ERROR_MARK
;
4978 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
4982 postfix-expression [ expression ]
4983 postfix-expression ( argument-expression-list[opt] )
4984 postfix-expression . identifier
4985 postfix-expression -> identifier
4986 postfix-expression ++
4987 postfix-expression --
4988 ( type-name ) { initializer-list }
4989 ( type-name ) { initializer-list , }
4991 argument-expression-list:
4993 argument-expression-list , argument-expression
5005 (treated as a keyword in GNU C)
5008 ( compound-statement )
5009 __builtin_va_arg ( assignment-expression , type-name )
5010 __builtin_offsetof ( type-name , offsetof-member-designator )
5011 __builtin_choose_expr ( assignment-expression ,
5012 assignment-expression ,
5013 assignment-expression )
5014 __builtin_types_compatible_p ( type-name , type-name )
5016 offsetof-member-designator:
5018 offsetof-member-designator . identifier
5019 offsetof-member-designator [ expression ]
5024 [ objc-receiver objc-message-args ]
5025 @selector ( objc-selector-arg )
5026 @protocol ( identifier )
5027 @encode ( type-name )
5031 static struct c_expr
5032 c_parser_postfix_expression (c_parser
*parser
)
5034 struct c_expr expr
, e1
, e2
, e3
;
5035 struct c_type_name
*t1
, *t2
;
5036 switch (c_parser_peek_token (parser
)->type
)
5041 expr
.value
= c_parser_peek_token (parser
)->value
;
5042 expr
.original_code
= ERROR_MARK
;
5043 c_parser_consume_token (parser
);
5047 expr
.value
= c_parser_peek_token (parser
)->value
;
5048 expr
.original_code
= STRING_CST
;
5049 c_parser_consume_token (parser
);
5051 case CPP_OBJC_STRING
:
5052 gcc_assert (c_dialect_objc ());
5054 = objc_build_string_object (c_parser_peek_token (parser
)->value
);
5055 expr
.original_code
= ERROR_MARK
;
5056 c_parser_consume_token (parser
);
5059 if (c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
5061 c_parser_error (parser
, "expected expression");
5062 expr
.value
= error_mark_node
;
5063 expr
.original_code
= ERROR_MARK
;
5067 tree id
= c_parser_peek_token (parser
)->value
;
5068 location_t loc
= c_parser_peek_token (parser
)->location
;
5069 c_parser_consume_token (parser
);
5070 expr
.value
= build_external_ref (id
,
5071 (c_parser_peek_token (parser
)->type
5072 == CPP_OPEN_PAREN
), loc
);
5073 expr
.original_code
= ERROR_MARK
;
5076 case CPP_OPEN_PAREN
:
5077 /* A parenthesized expression, statement expression or compound
5079 if (c_parser_peek_2nd_token (parser
)->type
== CPP_OPEN_BRACE
)
5081 /* A statement expression. */
5083 c_parser_consume_token (parser
);
5084 c_parser_consume_token (parser
);
5085 if (cur_stmt_list
== NULL
)
5087 error ("braced-group within expression allowed "
5088 "only inside a function");
5089 parser
->error
= true;
5090 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
5091 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5092 expr
.value
= error_mark_node
;
5093 expr
.original_code
= ERROR_MARK
;
5096 stmt
= c_begin_stmt_expr ();
5097 c_parser_compound_statement_nostart (parser
);
5098 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5101 pedwarn ("ISO C forbids braced-groups within expressions");
5102 expr
.value
= c_finish_stmt_expr (stmt
);
5103 expr
.original_code
= ERROR_MARK
;
5105 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5107 /* A compound literal. ??? Can we actually get here rather
5108 than going directly to
5109 c_parser_postfix_expression_after_paren_type from
5111 struct c_type_name
*type_name
;
5112 c_parser_consume_token (parser
);
5113 type_name
= c_parser_type_name (parser
);
5114 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5116 if (type_name
== NULL
)
5118 expr
.value
= error_mark_node
;
5119 expr
.original_code
= ERROR_MARK
;
5122 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5127 /* A parenthesized expression. */
5128 c_parser_consume_token (parser
);
5129 expr
= c_parser_expression (parser
);
5130 if (TREE_CODE (expr
.value
) == MODIFY_EXPR
)
5131 TREE_NO_WARNING (expr
.value
) = 1;
5132 expr
.original_code
= ERROR_MARK
;
5133 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5138 switch (c_parser_peek_token (parser
)->keyword
)
5140 case RID_FUNCTION_NAME
:
5141 case RID_PRETTY_FUNCTION_NAME
:
5142 case RID_C99_FUNCTION_NAME
:
5143 expr
.value
= fname_decl (c_parser_peek_token (parser
)->keyword
,
5144 c_parser_peek_token (parser
)->value
);
5145 expr
.original_code
= ERROR_MARK
;
5146 c_parser_consume_token (parser
);
5149 c_parser_consume_token (parser
);
5150 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5152 expr
.value
= error_mark_node
;
5153 expr
.original_code
= ERROR_MARK
;
5156 e1
= c_parser_expr_no_commas (parser
, NULL
);
5157 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5159 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5160 expr
.value
= error_mark_node
;
5161 expr
.original_code
= ERROR_MARK
;
5164 t1
= c_parser_type_name (parser
);
5165 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5169 expr
.value
= error_mark_node
;
5170 expr
.original_code
= ERROR_MARK
;
5174 expr
.value
= build_va_arg (e1
.value
, groktypename (t1
));
5175 expr
.original_code
= ERROR_MARK
;
5179 c_parser_consume_token (parser
);
5180 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5182 expr
.value
= error_mark_node
;
5183 expr
.original_code
= ERROR_MARK
;
5186 t1
= c_parser_type_name (parser
);
5189 expr
.value
= error_mark_node
;
5190 expr
.original_code
= ERROR_MARK
;
5193 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5195 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5196 expr
.value
= error_mark_node
;
5197 expr
.original_code
= ERROR_MARK
;
5201 tree type
= groktypename (t1
);
5203 if (type
== error_mark_node
)
5204 offsetof_ref
= error_mark_node
;
5206 offsetof_ref
= build1 (INDIRECT_REF
, type
, null_pointer_node
);
5207 /* Parse the second argument to __builtin_offsetof. We
5208 must have one identifier, and beyond that we want to
5209 accept sub structure and sub array references. */
5210 if (c_parser_next_token_is (parser
, CPP_NAME
))
5212 offsetof_ref
= build_component_ref
5213 (offsetof_ref
, c_parser_peek_token (parser
)->value
);
5214 c_parser_consume_token (parser
);
5215 while (c_parser_next_token_is (parser
, CPP_DOT
)
5216 || c_parser_next_token_is (parser
,
5219 if (c_parser_next_token_is (parser
, CPP_DOT
))
5221 c_parser_consume_token (parser
);
5222 if (c_parser_next_token_is_not (parser
,
5225 c_parser_error (parser
, "expected identifier");
5228 offsetof_ref
= build_component_ref
5230 c_parser_peek_token (parser
)->value
);
5231 c_parser_consume_token (parser
);
5236 c_parser_consume_token (parser
);
5237 idx
= c_parser_expression (parser
).value
;
5238 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5240 offsetof_ref
= build_array_ref (offsetof_ref
, idx
);
5245 c_parser_error (parser
, "expected identifier");
5246 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5248 expr
.value
= fold_offsetof (offsetof_ref
, NULL_TREE
);
5249 expr
.original_code
= ERROR_MARK
;
5252 case RID_CHOOSE_EXPR
:
5253 c_parser_consume_token (parser
);
5254 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5256 expr
.value
= error_mark_node
;
5257 expr
.original_code
= ERROR_MARK
;
5260 e1
= c_parser_expr_no_commas (parser
, NULL
);
5261 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5263 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5264 expr
.value
= error_mark_node
;
5265 expr
.original_code
= ERROR_MARK
;
5268 e2
= c_parser_expr_no_commas (parser
, NULL
);
5269 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5271 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5272 expr
.value
= error_mark_node
;
5273 expr
.original_code
= ERROR_MARK
;
5276 e3
= c_parser_expr_no_commas (parser
, NULL
);
5277 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5282 c
= fold (e1
.value
);
5283 if (TREE_CODE (c
) != INTEGER_CST
)
5284 error ("first argument to %<__builtin_choose_expr%> not"
5286 expr
= integer_zerop (c
) ? e3
: e2
;
5289 case RID_TYPES_COMPATIBLE_P
:
5290 c_parser_consume_token (parser
);
5291 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5293 expr
.value
= error_mark_node
;
5294 expr
.original_code
= ERROR_MARK
;
5297 t1
= c_parser_type_name (parser
);
5300 expr
.value
= error_mark_node
;
5301 expr
.original_code
= ERROR_MARK
;
5304 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5306 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5307 expr
.value
= error_mark_node
;
5308 expr
.original_code
= ERROR_MARK
;
5311 t2
= c_parser_type_name (parser
);
5314 expr
.value
= error_mark_node
;
5315 expr
.original_code
= ERROR_MARK
;
5318 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5323 e1
= TYPE_MAIN_VARIANT (groktypename (t1
));
5324 e2
= TYPE_MAIN_VARIANT (groktypename (t2
));
5326 expr
.value
= comptypes (e1
, e2
)
5327 ? build_int_cst (NULL_TREE
, 1)
5328 : build_int_cst (NULL_TREE
, 0);
5329 expr
.original_code
= ERROR_MARK
;
5332 case RID_AT_SELECTOR
:
5333 gcc_assert (c_dialect_objc ());
5334 c_parser_consume_token (parser
);
5335 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5337 expr
.value
= error_mark_node
;
5338 expr
.original_code
= ERROR_MARK
;
5342 tree sel
= c_parser_objc_selector_arg (parser
);
5343 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5345 expr
.value
= objc_build_selector_expr (sel
);
5346 expr
.original_code
= ERROR_MARK
;
5349 case RID_AT_PROTOCOL
:
5350 gcc_assert (c_dialect_objc ());
5351 c_parser_consume_token (parser
);
5352 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5354 expr
.value
= error_mark_node
;
5355 expr
.original_code
= ERROR_MARK
;
5358 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5360 c_parser_error (parser
, "expected identifier");
5361 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5362 expr
.value
= error_mark_node
;
5363 expr
.original_code
= ERROR_MARK
;
5367 tree id
= c_parser_peek_token (parser
)->value
;
5368 c_parser_consume_token (parser
);
5369 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5371 expr
.value
= objc_build_protocol_expr (id
);
5372 expr
.original_code
= ERROR_MARK
;
5376 /* Extension to support C-structures in the archiver. */
5377 gcc_assert (c_dialect_objc ());
5378 c_parser_consume_token (parser
);
5379 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5381 expr
.value
= error_mark_node
;
5382 expr
.original_code
= ERROR_MARK
;
5385 t1
= c_parser_type_name (parser
);
5388 expr
.value
= error_mark_node
;
5389 expr
.original_code
= ERROR_MARK
;
5390 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5393 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5396 tree type
= groktypename (t1
);
5397 expr
.value
= objc_build_encode_expr (type
);
5398 expr
.original_code
= ERROR_MARK
;
5402 c_parser_error (parser
, "expected expression");
5403 expr
.value
= error_mark_node
;
5404 expr
.original_code
= ERROR_MARK
;
5408 case CPP_OPEN_SQUARE
:
5409 if (c_dialect_objc ())
5411 tree receiver
, args
;
5412 c_parser_consume_token (parser
);
5413 receiver
= c_parser_objc_receiver (parser
);
5414 args
= c_parser_objc_message_args (parser
);
5415 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5417 expr
.value
= objc_build_message_expr (build_tree_list (receiver
,
5419 expr
.original_code
= ERROR_MARK
;
5422 /* Else fall through to report error. */
5424 c_parser_error (parser
, "expected expression");
5425 expr
.value
= error_mark_node
;
5426 expr
.original_code
= ERROR_MARK
;
5429 return c_parser_postfix_expression_after_primary (parser
, expr
);
5432 /* Parse a postfix expression after a parenthesized type name: the
5433 brace-enclosed initializer of a compound literal, possibly followed
5434 by some postfix operators. This is separate because it is not
5435 possible to tell until after the type name whether a cast
5436 expression has a cast or a compound literal, or whether the operand
5437 of sizeof is a parenthesized type name or starts with a compound
5440 static struct c_expr
5441 c_parser_postfix_expression_after_paren_type (c_parser
*parser
,
5442 struct c_type_name
*type_name
)
5447 start_init (NULL_TREE
, NULL
, 0);
5448 type
= groktypename (type_name
);
5449 if (type
!= error_mark_node
&& C_TYPE_VARIABLE_SIZE (type
))
5451 error ("compound literal has variable size");
5452 type
= error_mark_node
;
5454 init
= c_parser_braced_init (parser
, type
, false);
5456 maybe_warn_string_init (type
, init
);
5458 if (pedantic
&& !flag_isoc99
)
5459 pedwarn ("ISO C90 forbids compound literals");
5460 expr
.value
= build_compound_literal (type
, init
.value
);
5461 expr
.original_code
= ERROR_MARK
;
5462 return c_parser_postfix_expression_after_primary (parser
, expr
);
5465 /* Parse a postfix expression after the initial primary or compound
5466 literal; that is, parse a series of postfix operators. */
5468 static struct c_expr
5469 c_parser_postfix_expression_after_primary (c_parser
*parser
,
5472 tree ident
, idx
, exprlist
;
5475 switch (c_parser_peek_token (parser
)->type
)
5477 case CPP_OPEN_SQUARE
:
5478 /* Array reference. */
5479 c_parser_consume_token (parser
);
5480 idx
= c_parser_expression (parser
).value
;
5481 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5483 expr
.value
= build_array_ref (expr
.value
, idx
);
5484 expr
.original_code
= ERROR_MARK
;
5486 case CPP_OPEN_PAREN
:
5487 /* Function call. */
5488 c_parser_consume_token (parser
);
5489 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5490 exprlist
= NULL_TREE
;
5492 exprlist
= c_parser_expr_list (parser
, true);
5493 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5495 expr
.value
= build_function_call (expr
.value
, exprlist
);
5496 expr
.original_code
= ERROR_MARK
;
5499 /* Structure element reference. */
5500 c_parser_consume_token (parser
);
5501 expr
= default_function_array_conversion (expr
);
5502 if (c_parser_next_token_is (parser
, CPP_NAME
))
5503 ident
= c_parser_peek_token (parser
)->value
;
5506 c_parser_error (parser
, "expected identifier");
5507 expr
.value
= error_mark_node
;
5508 expr
.original_code
= ERROR_MARK
;
5511 c_parser_consume_token (parser
);
5512 expr
.value
= build_component_ref (expr
.value
, ident
);
5513 expr
.original_code
= ERROR_MARK
;
5516 /* Structure element reference. */
5517 c_parser_consume_token (parser
);
5518 expr
= default_function_array_conversion (expr
);
5519 if (c_parser_next_token_is (parser
, CPP_NAME
))
5520 ident
= c_parser_peek_token (parser
)->value
;
5523 c_parser_error (parser
, "expected identifier");
5524 expr
.value
= error_mark_node
;
5525 expr
.original_code
= ERROR_MARK
;
5528 c_parser_consume_token (parser
);
5529 expr
.value
= build_component_ref (build_indirect_ref (expr
.value
,
5531 expr
.original_code
= ERROR_MARK
;
5534 /* Postincrement. */
5535 c_parser_consume_token (parser
);
5536 expr
= default_function_array_conversion (expr
);
5537 expr
.value
= build_unary_op (POSTINCREMENT_EXPR
, expr
.value
, 0);
5538 expr
.original_code
= ERROR_MARK
;
5540 case CPP_MINUS_MINUS
:
5541 /* Postdecrement. */
5542 c_parser_consume_token (parser
);
5543 expr
= default_function_array_conversion (expr
);
5544 expr
.value
= build_unary_op (POSTDECREMENT_EXPR
, expr
.value
, 0);
5545 expr
.original_code
= ERROR_MARK
;
5553 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5556 assignment-expression
5557 expression , assignment-expression
5560 static struct c_expr
5561 c_parser_expression (c_parser
*parser
)
5564 expr
= c_parser_expr_no_commas (parser
, NULL
);
5565 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5568 c_parser_consume_token (parser
);
5569 next
= c_parser_expr_no_commas (parser
, NULL
);
5570 next
= default_function_array_conversion (next
);
5571 expr
.value
= build_compound_expr (expr
.value
, next
.value
);
5572 expr
.original_code
= COMPOUND_EXPR
;
5577 /* Parse an expression and convert functions or arrays to
5580 static struct c_expr
5581 c_parser_expression_conv (c_parser
*parser
)
5584 expr
= c_parser_expression (parser
);
5585 expr
= default_function_array_conversion (expr
);
5589 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5590 functions and arrays to pointers.
5593 assignment-expression
5594 nonempty-expr-list , assignment-expression
5598 c_parser_expr_list (c_parser
*parser
, bool convert_p
)
5602 expr
= c_parser_expr_no_commas (parser
, NULL
);
5604 expr
= default_function_array_conversion (expr
);
5605 ret
= cur
= build_tree_list (NULL_TREE
, expr
.value
);
5606 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5608 c_parser_consume_token (parser
);
5609 expr
= c_parser_expr_no_commas (parser
, NULL
);
5611 expr
= default_function_array_conversion (expr
);
5612 cur
= TREE_CHAIN (cur
) = build_tree_list (NULL_TREE
, expr
.value
);
5618 /* Parse Objective-C-specific constructs. */
5620 /* Parse an objc-class-definition.
5622 objc-class-definition:
5623 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5624 objc-class-instance-variables[opt] objc-methodprotolist @end
5625 @implementation identifier objc-superclass[opt]
5626 objc-class-instance-variables[opt]
5627 @interface identifier ( identifier ) objc-protocol-refs[opt]
5628 objc-methodprotolist @end
5629 @implementation identifier ( identifier )
5634 "@interface identifier (" must start "@interface identifier (
5635 identifier ) ...": objc-methodprotolist in the first production may
5636 not start with a parenthesized identifier as a declarator of a data
5637 definition with no declaration specifiers if the objc-superclass,
5638 objc-protocol-refs and objc-class-instance-variables are omitted. */
5641 c_parser_objc_class_definition (c_parser
*parser
)
5646 if (c_parser_next_token_is_keyword (parser
, RID_AT_INTERFACE
))
5648 else if (c_parser_next_token_is_keyword (parser
, RID_AT_IMPLEMENTATION
))
5652 c_parser_consume_token (parser
);
5653 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5655 c_parser_error (parser
, "expected identifier");
5658 id1
= c_parser_peek_token (parser
)->value
;
5659 c_parser_consume_token (parser
);
5660 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
5663 tree proto
= NULL_TREE
;
5664 c_parser_consume_token (parser
);
5665 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5667 c_parser_error (parser
, "expected identifier");
5668 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5671 id2
= c_parser_peek_token (parser
)->value
;
5672 c_parser_consume_token (parser
);
5673 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5676 objc_start_category_implementation (id1
, id2
);
5679 if (c_parser_next_token_is (parser
, CPP_LESS
))
5680 proto
= c_parser_objc_protocol_refs (parser
);
5681 objc_start_category_interface (id1
, id2
, proto
);
5682 c_parser_objc_methodprotolist (parser
);
5683 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5684 objc_finish_interface ();
5687 if (c_parser_next_token_is (parser
, CPP_COLON
))
5689 c_parser_consume_token (parser
);
5690 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5692 c_parser_error (parser
, "expected identifier");
5695 superclass
= c_parser_peek_token (parser
)->value
;
5696 c_parser_consume_token (parser
);
5699 superclass
= NULL_TREE
;
5702 tree proto
= NULL_TREE
;
5703 if (c_parser_next_token_is (parser
, CPP_LESS
))
5704 proto
= c_parser_objc_protocol_refs (parser
);
5705 objc_start_class_interface (id1
, superclass
, proto
);
5708 objc_start_class_implementation (id1
, superclass
);
5709 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5710 c_parser_objc_class_instance_variables (parser
);
5713 objc_continue_interface ();
5714 c_parser_objc_methodprotolist (parser
);
5715 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5716 objc_finish_interface ();
5720 objc_continue_implementation ();
5725 /* Parse objc-class-instance-variables.
5727 objc-class-instance-variables:
5728 { objc-instance-variable-decl-list[opt] }
5730 objc-instance-variable-decl-list:
5731 objc-visibility-spec
5732 objc-instance-variable-decl ;
5734 objc-instance-variable-decl-list objc-visibility-spec
5735 objc-instance-variable-decl-list objc-instance-variable-decl ;
5736 objc-instance-variable-decl-list ;
5738 objc-visibility-spec:
5743 objc-instance-variable-decl:
5748 c_parser_objc_class_instance_variables (c_parser
*parser
)
5750 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
5751 c_parser_consume_token (parser
);
5752 while (c_parser_next_token_is_not (parser
, CPP_EOF
))
5755 /* Parse any stray semicolon. */
5756 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
5759 pedwarn ("extra semicolon in struct or union specified");
5760 c_parser_consume_token (parser
);
5763 /* Stop if at the end of the instance variables. */
5764 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
5766 c_parser_consume_token (parser
);
5769 /* Parse any objc-visibility-spec. */
5770 if (c_parser_next_token_is_keyword (parser
, RID_AT_PRIVATE
))
5772 c_parser_consume_token (parser
);
5773 objc_set_visibility (2);
5776 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PROTECTED
))
5778 c_parser_consume_token (parser
);
5779 objc_set_visibility (0);
5782 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PUBLIC
))
5784 c_parser_consume_token (parser
);
5785 objc_set_visibility (1);
5788 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
5790 c_parser_pragma (parser
, pragma_external
);
5794 /* Parse some comma-separated declarations. */
5795 decls
= c_parser_struct_declaration (parser
);
5797 /* Comma-separated instance variables are chained together in
5798 reverse order; add them one by one. */
5799 tree ivar
= nreverse (decls
);
5800 for (; ivar
; ivar
= TREE_CHAIN (ivar
))
5801 objc_add_instance_variable (copy_node (ivar
));
5803 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5807 /* Parse an objc-class-declaration.
5809 objc-class-declaration:
5810 @class identifier-list ;
5814 c_parser_objc_class_declaration (c_parser
*parser
)
5816 tree list
= NULL_TREE
;
5817 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_CLASS
));
5818 c_parser_consume_token (parser
);
5819 /* Any identifiers, including those declared as type names, are OK
5824 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5826 c_parser_error (parser
, "expected identifier");
5829 id
= c_parser_peek_token (parser
)->value
;
5830 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
5831 c_parser_consume_token (parser
);
5832 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5833 c_parser_consume_token (parser
);
5837 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5838 objc_declare_class (list
);
5841 /* Parse an objc-alias-declaration.
5843 objc-alias-declaration:
5844 @compatibility_alias identifier identifier ;
5848 c_parser_objc_alias_declaration (c_parser
*parser
)
5851 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_ALIAS
));
5852 c_parser_consume_token (parser
);
5853 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5855 c_parser_error (parser
, "expected identifier");
5856 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
5859 id1
= c_parser_peek_token (parser
)->value
;
5860 c_parser_consume_token (parser
);
5861 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5863 c_parser_error (parser
, "expected identifier");
5864 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
5867 id2
= c_parser_peek_token (parser
)->value
;
5868 c_parser_consume_token (parser
);
5869 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5870 objc_declare_alias (id1
, id2
);
5873 /* Parse an objc-protocol-definition.
5875 objc-protocol-definition:
5876 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
5877 @protocol identifier-list ;
5879 "@protocol identifier ;" should be resolved as "@protocol
5880 identifier-list ;": objc-methodprotolist may not start with a
5881 semicolon in the first alternative if objc-protocol-refs are
5885 c_parser_objc_protocol_definition (c_parser
*parser
)
5887 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROTOCOL
));
5888 c_parser_consume_token (parser
);
5889 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5891 c_parser_error (parser
, "expected identifier");
5894 if (c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
5895 || c_parser_peek_2nd_token (parser
)->type
== CPP_SEMICOLON
)
5897 tree list
= NULL_TREE
;
5898 /* Any identifiers, including those declared as type names, are
5903 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5905 c_parser_error (parser
, "expected identifier");
5908 id
= c_parser_peek_token (parser
)->value
;
5909 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
5910 c_parser_consume_token (parser
);
5911 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5912 c_parser_consume_token (parser
);
5916 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5917 objc_declare_protocols (list
);
5921 tree id
= c_parser_peek_token (parser
)->value
;
5922 tree proto
= NULL_TREE
;
5923 c_parser_consume_token (parser
);
5924 if (c_parser_next_token_is (parser
, CPP_LESS
))
5925 proto
= c_parser_objc_protocol_refs (parser
);
5926 objc_pq_context
= 1;
5927 objc_start_protocol (id
, proto
);
5928 c_parser_objc_methodprotolist (parser
);
5929 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5930 objc_pq_context
= 0;
5931 objc_finish_interface ();
5935 /* Parse an objc-method-type.
5942 static enum tree_code
5943 c_parser_objc_method_type (c_parser
*parser
)
5945 switch (c_parser_peek_token (parser
)->type
)
5948 c_parser_consume_token (parser
);
5951 c_parser_consume_token (parser
);
5958 /* Parse an objc-method-definition.
5960 objc-method-definition:
5961 objc-method-type objc-method-decl ;[opt] compound-statement
5965 c_parser_objc_method_definition (c_parser
*parser
)
5967 enum tree_code type
= c_parser_objc_method_type (parser
);
5969 objc_set_method_type (type
);
5970 objc_pq_context
= 1;
5971 decl
= c_parser_objc_method_decl (parser
);
5972 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
5974 c_parser_consume_token (parser
);
5976 pedwarn ("extra semicolon in method definition specified");
5978 if (!c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5980 c_parser_error (parser
, "expected %<{%>");
5983 objc_pq_context
= 0;
5984 objc_start_method_definition (decl
);
5985 add_stmt (c_parser_compound_statement (parser
));
5986 objc_finish_method_definition (current_function_decl
);
5989 /* Parse an objc-methodprotolist.
5991 objc-methodprotolist:
5993 objc-methodprotolist objc-methodproto
5994 objc-methodprotolist declaration
5995 objc-methodprotolist ;
5997 The declaration is a data definition, which may be missing
5998 declaration specifiers under the same rules and diagnostics as
5999 other data definitions outside functions, and the stray semicolon
6000 is diagnosed the same way as a stray semicolon outside a
6004 c_parser_objc_methodprotolist (c_parser
*parser
)
6008 /* The list is terminated by @end. */
6009 switch (c_parser_peek_token (parser
)->type
)
6013 pedwarn ("ISO C does not allow extra %<;%> outside of a function");
6014 c_parser_consume_token (parser
);
6018 c_parser_objc_methodproto (parser
);
6021 c_parser_pragma (parser
, pragma_external
);
6026 if (c_parser_next_token_is_keyword (parser
, RID_AT_END
))
6028 c_parser_declaration_or_fndef (parser
, false, true, false, true);
6034 /* Parse an objc-methodproto.
6037 objc-method-type objc-method-decl ;
6041 c_parser_objc_methodproto (c_parser
*parser
)
6043 enum tree_code type
= c_parser_objc_method_type (parser
);
6045 objc_set_method_type (type
);
6046 /* Remember protocol qualifiers in prototypes. */
6047 objc_pq_context
= 1;
6048 decl
= c_parser_objc_method_decl (parser
);
6049 /* Forget protocol qualifiers here. */
6050 objc_pq_context
= 0;
6051 objc_add_method_declaration (decl
);
6052 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6055 /* Parse an objc-method-decl.
6058 ( objc-type-name ) objc-selector
6060 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6061 objc-keyword-selector objc-optparmlist
6063 objc-keyword-selector:
6065 objc-keyword-selector objc-keyword-decl
6068 objc-selector : ( objc-type-name ) identifier
6069 objc-selector : identifier
6070 : ( objc-type-name ) identifier
6074 objc-optparms objc-optellipsis
6078 objc-opt-parms , parameter-declaration
6086 c_parser_objc_method_decl (c_parser
*parser
)
6088 tree type
= NULL_TREE
;
6090 tree parms
= NULL_TREE
;
6091 bool ellipsis
= false;
6093 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6095 c_parser_consume_token (parser
);
6096 type
= c_parser_objc_type_name (parser
);
6097 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6099 sel
= c_parser_objc_selector (parser
);
6100 /* If there is no selector, or a colon follows, we have an
6101 objc-keyword-selector. If there is a selector, and a colon does
6102 not follow, that selector ends the objc-method-decl. */
6103 if (!sel
|| c_parser_next_token_is (parser
, CPP_COLON
))
6106 tree list
= NULL_TREE
;
6109 tree atype
= NULL_TREE
, id
, keyworddecl
;
6110 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6112 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6114 c_parser_consume_token (parser
);
6115 atype
= c_parser_objc_type_name (parser
);
6116 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6119 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6121 c_parser_error (parser
, "expected identifier");
6122 return error_mark_node
;
6124 id
= c_parser_peek_token (parser
)->value
;
6125 c_parser_consume_token (parser
);
6126 keyworddecl
= objc_build_keyword_decl (tsel
, atype
, id
);
6127 list
= chainon (list
, keyworddecl
);
6128 tsel
= c_parser_objc_selector (parser
);
6129 if (!tsel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6132 /* Parse the optional parameter list. Optional Objective-C
6133 method parameters follow the C syntax, and may include '...'
6134 to denote a variable number of arguments. */
6135 parms
= make_node (TREE_LIST
);
6136 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6138 struct c_parm
*parm
;
6139 c_parser_consume_token (parser
);
6140 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
6143 c_parser_consume_token (parser
);
6146 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6149 parms
= chainon (parms
,
6150 build_tree_list (NULL_TREE
, grokparm (parm
)));
6154 return objc_build_method_signature (type
, sel
, parms
, ellipsis
);
6157 /* Parse an objc-type-name.
6160 objc-type-qualifiers[opt] type-name
6161 objc-type-qualifiers[opt]
6163 objc-type-qualifiers:
6165 objc-type-qualifiers objc-type-qualifier
6167 objc-type-qualifier: one of
6168 in out inout bycopy byref oneway
6172 c_parser_objc_type_name (c_parser
*parser
)
6174 tree quals
= NULL_TREE
;
6175 struct c_type_name
*typename
= NULL
;
6176 tree type
= NULL_TREE
;
6179 c_token
*token
= c_parser_peek_token (parser
);
6180 if (token
->type
== CPP_KEYWORD
6181 && (token
->keyword
== RID_IN
6182 || token
->keyword
== RID_OUT
6183 || token
->keyword
== RID_INOUT
6184 || token
->keyword
== RID_BYCOPY
6185 || token
->keyword
== RID_BYREF
6186 || token
->keyword
== RID_ONEWAY
))
6188 quals
= chainon (quals
, build_tree_list (NULL_TREE
, token
->value
));
6189 c_parser_consume_token (parser
);
6194 if (c_parser_next_token_starts_typename (parser
))
6195 typename
= c_parser_type_name (parser
);
6197 type
= groktypename (typename
);
6198 return build_tree_list (quals
, type
);
6201 /* Parse objc-protocol-refs.
6208 c_parser_objc_protocol_refs (c_parser
*parser
)
6210 tree list
= NULL_TREE
;
6211 gcc_assert (c_parser_next_token_is (parser
, CPP_LESS
));
6212 c_parser_consume_token (parser
);
6213 /* Any identifiers, including those declared as type names, are OK
6218 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6220 c_parser_error (parser
, "expected identifier");
6223 id
= c_parser_peek_token (parser
)->value
;
6224 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
6225 c_parser_consume_token (parser
);
6226 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6227 c_parser_consume_token (parser
);
6231 c_parser_require (parser
, CPP_GREATER
, "expected %<>%>");
6235 /* Parse an objc-try-catch-statement.
6237 objc-try-catch-statement:
6238 @try compound-statement objc-catch-list[opt]
6239 @try compound-statement objc-catch-list[opt] @finally compound-statement
6242 @catch ( parameter-declaration ) compound-statement
6243 objc-catch-list @catch ( parameter-declaration ) compound-statement
6247 c_parser_objc_try_catch_statement (c_parser
*parser
)
6251 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_TRY
));
6252 c_parser_consume_token (parser
);
6253 loc
= c_parser_peek_token (parser
)->location
;
6254 stmt
= c_parser_compound_statement (parser
);
6255 objc_begin_try_stmt (loc
, stmt
);
6256 while (c_parser_next_token_is_keyword (parser
, RID_AT_CATCH
))
6258 struct c_parm
*parm
;
6259 c_parser_consume_token (parser
);
6260 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6262 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6265 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6268 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6269 objc_begin_catch_clause (grokparm (parm
));
6270 if (c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
6271 c_parser_compound_statement_nostart (parser
);
6272 objc_finish_catch_clause ();
6274 if (c_parser_next_token_is_keyword (parser
, RID_AT_FINALLY
))
6278 c_parser_consume_token (parser
);
6279 finloc
= c_parser_peek_token (parser
)->location
;
6280 finstmt
= c_parser_compound_statement (parser
);
6281 objc_build_finally_clause (finloc
, finstmt
);
6283 objc_finish_try_stmt ();
6286 /* Parse an objc-synchronized-statement.
6288 objc-synchronized-statement:
6289 @synchronized ( expression ) compound-statement
6293 c_parser_objc_synchronized_statement (c_parser
*parser
)
6297 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNCHRONIZED
));
6298 c_parser_consume_token (parser
);
6299 loc
= c_parser_peek_token (parser
)->location
;
6300 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6302 expr
= c_parser_expression (parser
).value
;
6303 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6306 expr
= error_mark_node
;
6307 stmt
= c_parser_compound_statement (parser
);
6308 objc_build_synchronized (loc
, expr
, stmt
);
6311 /* Parse an objc-selector; return NULL_TREE without an error if the
6312 next token is not an objc-selector.
6317 enum struct union if else while do for switch case default
6318 break continue return goto asm sizeof typeof __alignof
6319 unsigned long const short volatile signed restrict _Complex
6320 in out inout bycopy byref oneway int char float double void _Bool
6322 ??? Why this selection of keywords but not, for example, storage
6323 class specifiers? */
6326 c_parser_objc_selector (c_parser
*parser
)
6328 c_token
*token
= c_parser_peek_token (parser
);
6329 tree value
= token
->value
;
6330 if (token
->type
== CPP_NAME
)
6332 c_parser_consume_token (parser
);
6335 if (token
->type
!= CPP_KEYWORD
)
6337 switch (token
->keyword
)
6378 c_parser_consume_token (parser
);
6385 /* Parse an objc-selector-arg.
6389 objc-keywordname-list
6391 objc-keywordname-list:
6393 objc-keywordname-list objc-keywordname
6401 c_parser_objc_selector_arg (c_parser
*parser
)
6403 tree sel
= c_parser_objc_selector (parser
);
6404 tree list
= NULL_TREE
;
6405 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6409 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6411 list
= chainon (list
, build_tree_list (sel
, NULL_TREE
));
6412 sel
= c_parser_objc_selector (parser
);
6413 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6419 /* Parse an objc-receiver.
6428 c_parser_objc_receiver (c_parser
*parser
)
6430 if (c_parser_peek_token (parser
)->type
== CPP_NAME
6431 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
6432 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
6434 tree id
= c_parser_peek_token (parser
)->value
;
6435 c_parser_consume_token (parser
);
6436 return objc_get_class_reference (id
);
6438 return c_parser_expression (parser
).value
;
6441 /* Parse objc-message-args.
6445 objc-keywordarg-list
6447 objc-keywordarg-list:
6449 objc-keywordarg-list objc-keywordarg
6452 objc-selector : objc-keywordexpr
6457 c_parser_objc_message_args (c_parser
*parser
)
6459 tree sel
= c_parser_objc_selector (parser
);
6460 tree list
= NULL_TREE
;
6461 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6466 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6468 keywordexpr
= c_parser_objc_keywordexpr (parser
);
6469 list
= chainon (list
, build_tree_list (sel
, keywordexpr
));
6470 sel
= c_parser_objc_selector (parser
);
6471 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6477 /* Parse an objc-keywordexpr.
6484 c_parser_objc_keywordexpr (c_parser
*parser
)
6486 tree list
= c_parser_expr_list (parser
, true);
6487 if (TREE_CHAIN (list
) == NULL_TREE
)
6489 /* Just return the expression, remove a level of
6491 return TREE_VALUE (list
);
6495 /* We have a comma expression, we will collapse later. */
6501 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6502 should be considered, statements. ALLOW_STMT is true if we're within
6503 the context of a function and such pragmas are to be allowed. Returns
6504 true if we actually parsed such a pragma. */
6507 c_parser_pragma (c_parser
*parser
, enum pragma_context context
)
6511 id
= c_parser_peek_token (parser
)->pragma_kind
;
6512 gcc_assert (id
!= PRAGMA_NONE
);
6516 case PRAGMA_OMP_BARRIER
:
6517 if (context
!= pragma_compound
)
6519 if (context
== pragma_stmt
)
6520 c_parser_error (parser
, "%<#pragma omp barrier%> may only be "
6521 "used in compound statements");
6524 c_parser_omp_barrier (parser
);
6527 case PRAGMA_OMP_FLUSH
:
6528 if (context
!= pragma_compound
)
6530 if (context
== pragma_stmt
)
6531 c_parser_error (parser
, "%<#pragma omp flush%> may only be "
6532 "used in compound statements");
6535 c_parser_omp_flush (parser
);
6538 case PRAGMA_OMP_THREADPRIVATE
:
6539 c_parser_omp_threadprivate (parser
);
6542 case PRAGMA_OMP_SECTION
:
6543 error ("%<#pragma omp section%> may only be used in "
6544 "%<#pragma omp sections%> construct");
6545 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6548 case PRAGMA_GCC_PCH_PREPROCESS
:
6549 c_parser_error (parser
, "%<#pragma GCC pch_preprocess%> must be first");
6550 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6554 if (id
< PRAGMA_FIRST_EXTERNAL
)
6556 if (context
== pragma_external
)
6559 c_parser_error (parser
, "expected declaration specifiers");
6560 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6563 c_parser_omp_construct (parser
);
6569 c_parser_consume_pragma (parser
);
6570 c_invoke_pragma_handler (id
);
6572 /* Skip to EOL, but suppress any error message. Those will have been
6573 generated by the handler routine through calling error, as opposed
6574 to calling c_parser_error. */
6575 parser
->error
= true;
6576 c_parser_skip_to_pragma_eol (parser
);
6581 /* The interface the pragma parsers have to the lexer. */
6584 pragma_lex (tree
*value
)
6586 c_token
*tok
= c_parser_peek_token (the_parser
);
6587 enum cpp_ttype ret
= tok
->type
;
6589 *value
= tok
->value
;
6590 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
6594 if (ret
== CPP_KEYWORD
)
6596 c_parser_consume_token (the_parser
);
6603 c_parser_pragma_pch_preprocess (c_parser
*parser
)
6607 c_parser_consume_pragma (parser
);
6608 if (c_parser_next_token_is (parser
, CPP_STRING
))
6610 name
= c_parser_peek_token (parser
)->value
;
6611 c_parser_consume_token (parser
);
6614 c_parser_error (parser
, "expected string literal");
6615 c_parser_skip_to_pragma_eol (parser
);
6618 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
6621 /* OpenMP 2.5 parsing routines. */
6623 /* Returns name of the next clause.
6624 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6625 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6626 returned and the token is consumed. */
6628 static pragma_omp_clause
6629 c_parser_omp_clause_name (c_parser
*parser
)
6631 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
6633 if (c_parser_next_token_is_keyword (parser
, RID_IF
))
6634 result
= PRAGMA_OMP_CLAUSE_IF
;
6635 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
6636 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
6637 else if (c_parser_next_token_is (parser
, CPP_NAME
))
6639 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6644 if (!strcmp ("copyin", p
))
6645 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
6646 else if (!strcmp ("copyprivate", p
))
6647 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
6650 if (!strcmp ("firstprivate", p
))
6651 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
6654 if (!strcmp ("lastprivate", p
))
6655 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
6658 if (!strcmp ("nowait", p
))
6659 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
6660 else if (!strcmp ("num_threads", p
))
6661 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
6664 if (!strcmp ("ordered", p
))
6665 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
6668 if (!strcmp ("private", p
))
6669 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
6672 if (!strcmp ("reduction", p
))
6673 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
6676 if (!strcmp ("schedule", p
))
6677 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
6678 else if (!strcmp ("shared", p
))
6679 result
= PRAGMA_OMP_CLAUSE_SHARED
;
6684 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
6685 c_parser_consume_token (parser
);
6690 /* Validate that a clause of the given type does not already exist. */
6693 check_no_duplicate_clause (tree clauses
, enum tree_code code
, const char *name
)
6697 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
6698 if (OMP_CLAUSE_CODE (c
) == code
)
6700 error ("too many %qs clauses", name
);
6708 variable-list , identifier
6710 If KIND is nonzero, create the appropriate node and install the decl
6711 in OMP_CLAUSE_DECL and add the node to the head of the list.
6713 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6714 return the list created. */
6717 c_parser_omp_variable_list (c_parser
*parser
, enum omp_clause_code kind
,
6720 if (c_parser_next_token_is_not (parser
, CPP_NAME
)
6721 || c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
6722 c_parser_error (parser
, "expected identifier");
6724 while (c_parser_next_token_is (parser
, CPP_NAME
)
6725 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
6727 tree t
= lookup_name (c_parser_peek_token (parser
)->value
);
6730 undeclared_variable (c_parser_peek_token (parser
)->value
,
6731 c_parser_peek_token (parser
)->location
);
6732 else if (t
== error_mark_node
)
6736 tree u
= build_omp_clause (kind
);
6737 OMP_CLAUSE_DECL (u
) = t
;
6738 OMP_CLAUSE_CHAIN (u
) = list
;
6742 list
= tree_cons (t
, NULL_TREE
, list
);
6744 c_parser_consume_token (parser
);
6746 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
6749 c_parser_consume_token (parser
);
6755 /* Similarly, but expect leading and trailing parenthesis. This is a very
6756 common case for omp clauses. */
6759 c_parser_omp_var_list_parens (c_parser
*parser
, enum tree_code kind
, tree list
)
6761 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6763 list
= c_parser_omp_variable_list (parser
, kind
, list
);
6764 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6770 copyin ( variable-list ) */
6773 c_parser_omp_clause_copyin (c_parser
*parser
, tree list
)
6775 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYIN
, list
);
6779 copyprivate ( variable-list ) */
6782 c_parser_omp_clause_copyprivate (c_parser
*parser
, tree list
)
6784 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYPRIVATE
, list
);
6788 default ( shared | none ) */
6791 c_parser_omp_clause_default (c_parser
*parser
, tree list
)
6793 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
6796 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6798 if (c_parser_next_token_is (parser
, CPP_NAME
))
6800 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6805 if (strcmp ("none", p
) != 0)
6807 kind
= OMP_CLAUSE_DEFAULT_NONE
;
6811 if (strcmp ("shared", p
) != 0)
6813 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
6820 c_parser_consume_token (parser
);
6825 c_parser_error (parser
, "expected %<none%> or %<shared%>");
6827 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6829 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
6832 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default");
6833 c
= build_omp_clause (OMP_CLAUSE_DEFAULT
);
6834 OMP_CLAUSE_CHAIN (c
) = list
;
6835 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
6841 firstprivate ( variable-list ) */
6844 c_parser_omp_clause_firstprivate (c_parser
*parser
, tree list
)
6846 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_FIRSTPRIVATE
, list
);
6850 if ( expression ) */
6853 c_parser_omp_clause_if (c_parser
*parser
, tree list
)
6855 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6857 tree t
= c_parser_paren_condition (parser
);
6860 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if");
6862 c
= build_omp_clause (OMP_CLAUSE_IF
);
6863 OMP_CLAUSE_IF_EXPR (c
) = t
;
6864 OMP_CLAUSE_CHAIN (c
) = list
;
6868 c_parser_error (parser
, "expected %<(%>");
6874 lastprivate ( variable-list ) */
6877 c_parser_omp_clause_lastprivate (c_parser
*parser
, tree list
)
6879 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_LASTPRIVATE
, list
);
6886 c_parser_omp_clause_nowait (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
6890 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait");
6892 c
= build_omp_clause (OMP_CLAUSE_NOWAIT
);
6893 OMP_CLAUSE_CHAIN (c
) = list
;
6898 num_threads ( expression ) */
6901 c_parser_omp_clause_num_threads (c_parser
*parser
, tree list
)
6903 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6905 tree c
, t
= c_parser_expression (parser
).value
;
6907 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6909 if (!INTEGRAL_TYPE_P (TREE_TYPE (t
)))
6911 c_parser_error (parser
, "expected integer expression");
6915 /* Attempt to statically determine when the number isn't positive. */
6916 c
= fold_build2 (LE_EXPR
, boolean_type_node
, t
,
6917 build_int_cst (TREE_TYPE (t
), 0));
6918 if (c
== boolean_true_node
)
6920 warning (0, "%<num_threads%> value must be positive");
6921 t
= integer_one_node
;
6924 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
, "num_threads");
6926 c
= build_omp_clause (OMP_CLAUSE_NUM_THREADS
);
6927 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
6928 OMP_CLAUSE_CHAIN (c
) = list
;
6939 c_parser_omp_clause_ordered (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
6943 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
, "ordered");
6945 c
= build_omp_clause (OMP_CLAUSE_ORDERED
);
6946 OMP_CLAUSE_CHAIN (c
) = list
;
6951 private ( variable-list ) */
6954 c_parser_omp_clause_private (c_parser
*parser
, tree list
)
6956 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_PRIVATE
, list
);
6960 reduction ( reduction-operator : variable-list )
6963 One of: + * - & ^ | && || */
6966 c_parser_omp_clause_reduction (c_parser
*parser
, tree list
)
6968 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6970 enum tree_code code
;
6972 switch (c_parser_peek_token (parser
)->type
)
6984 code
= BIT_AND_EXPR
;
6987 code
= BIT_XOR_EXPR
;
6990 code
= BIT_IOR_EXPR
;
6993 code
= TRUTH_ANDIF_EXPR
;
6996 code
= TRUTH_ORIF_EXPR
;
6999 c_parser_error (parser
,
7000 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
7001 "%<^%>, %<|%>, %<&&%>, or %<||%>");
7002 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7005 c_parser_consume_token (parser
);
7006 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7010 nl
= c_parser_omp_variable_list (parser
, OMP_CLAUSE_REDUCTION
, list
);
7011 for (c
= nl
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
7012 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
7016 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7022 schedule ( schedule-kind )
7023 schedule ( schedule-kind , expression )
7026 static | dynamic | guided | runtime
7030 c_parser_omp_clause_schedule (c_parser
*parser
, tree list
)
7034 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7037 c
= build_omp_clause (OMP_CLAUSE_SCHEDULE
);
7039 if (c_parser_next_token_is (parser
, CPP_NAME
))
7041 tree kind
= c_parser_peek_token (parser
)->value
;
7042 const char *p
= IDENTIFIER_POINTER (kind
);
7047 if (strcmp ("dynamic", p
) != 0)
7049 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
7053 if (strcmp ("guided", p
) != 0)
7055 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
7059 if (strcmp ("runtime", p
) != 0)
7061 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
7068 else if (c_parser_next_token_is_keyword (parser
, RID_STATIC
))
7069 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
7073 c_parser_consume_token (parser
);
7074 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7076 c_parser_consume_token (parser
);
7078 t
= c_parser_expr_no_commas (parser
, NULL
).value
;
7080 if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
7081 error ("schedule %<runtime%> does not take "
7082 "a %<chunk_size%> parameter");
7083 else if (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
)
7084 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
7086 c_parser_error (parser
, "expected integer expression");
7088 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7091 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7092 "expected %<,%> or %<)%>");
7094 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule");
7095 OMP_CLAUSE_CHAIN (c
) = list
;
7099 c_parser_error (parser
, "invalid schedule kind");
7100 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7105 shared ( variable-list ) */
7108 c_parser_omp_clause_shared (c_parser
*parser
, tree list
)
7110 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_SHARED
, list
);
7113 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7114 is a bitmask in MASK. Return the list of clauses found; the result
7115 of clause default goes in *pdefault. */
7118 c_parser_omp_all_clauses (c_parser
*parser
, unsigned int mask
,
7121 tree clauses
= NULL
;
7123 while (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7125 const pragma_omp_clause c_kind
= c_parser_omp_clause_name (parser
);
7127 tree prev
= clauses
;
7131 case PRAGMA_OMP_CLAUSE_COPYIN
:
7132 clauses
= c_parser_omp_clause_copyin (parser
, clauses
);
7135 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
7136 clauses
= c_parser_omp_clause_copyprivate (parser
, clauses
);
7137 c_name
= "copyprivate";
7139 case PRAGMA_OMP_CLAUSE_DEFAULT
:
7140 clauses
= c_parser_omp_clause_default (parser
, clauses
);
7143 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
7144 clauses
= c_parser_omp_clause_firstprivate (parser
, clauses
);
7145 c_name
= "firstprivate";
7147 case PRAGMA_OMP_CLAUSE_IF
:
7148 clauses
= c_parser_omp_clause_if (parser
, clauses
);
7151 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
7152 clauses
= c_parser_omp_clause_lastprivate (parser
, clauses
);
7153 c_name
= "lastprivate";
7155 case PRAGMA_OMP_CLAUSE_NOWAIT
:
7156 clauses
= c_parser_omp_clause_nowait (parser
, clauses
);
7159 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
7160 clauses
= c_parser_omp_clause_num_threads (parser
, clauses
);
7161 c_name
= "num_threads";
7163 case PRAGMA_OMP_CLAUSE_ORDERED
:
7164 clauses
= c_parser_omp_clause_ordered (parser
, clauses
);
7167 case PRAGMA_OMP_CLAUSE_PRIVATE
:
7168 clauses
= c_parser_omp_clause_private (parser
, clauses
);
7171 case PRAGMA_OMP_CLAUSE_REDUCTION
:
7172 clauses
= c_parser_omp_clause_reduction (parser
, clauses
);
7173 c_name
= "reduction";
7175 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
7176 clauses
= c_parser_omp_clause_schedule (parser
, clauses
);
7177 c_name
= "schedule";
7179 case PRAGMA_OMP_CLAUSE_SHARED
:
7180 clauses
= c_parser_omp_clause_shared (parser
, clauses
);
7184 c_parser_error (parser
, "expected %<#pragma omp%> clause");
7188 if (((mask
>> c_kind
) & 1) == 0 && !parser
->error
)
7190 /* Remove the invalid clause(s) from the list to avoid
7191 confusing the rest of the compiler. */
7193 error ("%qs is not valid for %qs", c_name
, where
);
7198 c_parser_skip_to_pragma_eol (parser
);
7200 return c_finish_omp_clauses (clauses
);
7207 In practice, we're also interested in adding the statement to an
7208 outer node. So it is convenient if we work around the fact that
7209 c_parser_statement calls add_stmt. */
7212 c_parser_omp_structured_block (c_parser
*parser
)
7214 tree stmt
= push_stmt_list ();
7215 c_parser_statement (parser
);
7216 return pop_stmt_list (stmt
);
7220 # pragma omp atomic new-line
7224 x binop= expr | x++ | ++x | x-- | --x
7226 +, *, -, /, &, ^, |, <<, >>
7228 where x is an lvalue expression with scalar type. */
7231 c_parser_omp_atomic (c_parser
*parser
)
7235 enum tree_code code
;
7237 c_parser_skip_to_pragma_eol (parser
);
7239 lhs
= c_parser_unary_expression (parser
).value
;
7240 switch (TREE_CODE (lhs
))
7244 c_parser_skip_to_end_of_block_or_statement (parser
);
7247 case PREINCREMENT_EXPR
:
7248 case POSTINCREMENT_EXPR
:
7249 lhs
= TREE_OPERAND (lhs
, 0);
7251 rhs
= integer_one_node
;
7254 case PREDECREMENT_EXPR
:
7255 case POSTDECREMENT_EXPR
:
7256 lhs
= TREE_OPERAND (lhs
, 0);
7258 rhs
= integer_one_node
;
7262 switch (c_parser_peek_token (parser
)->type
)
7268 code
= TRUNC_DIV_EXPR
;
7283 code
= BIT_AND_EXPR
;
7286 code
= BIT_IOR_EXPR
;
7289 code
= BIT_XOR_EXPR
;
7292 c_parser_error (parser
,
7293 "invalid operator for %<#pragma omp atomic%>");
7297 c_parser_consume_token (parser
);
7298 rhs
= c_parser_expression (parser
).value
;
7301 stmt
= c_finish_omp_atomic (code
, lhs
, rhs
);
7302 if (stmt
!= error_mark_node
)
7304 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7309 # pragma omp barrier new-line
7313 c_parser_omp_barrier (c_parser
*parser
)
7315 c_parser_consume_pragma (parser
);
7316 c_parser_skip_to_pragma_eol (parser
);
7318 c_finish_omp_barrier ();
7322 # pragma omp critical [(name)] new-line
7327 c_parser_omp_critical (c_parser
*parser
)
7329 tree stmt
, name
= NULL
;
7331 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7333 c_parser_consume_token (parser
);
7334 if (c_parser_next_token_is (parser
, CPP_NAME
))
7336 name
= c_parser_peek_token (parser
)->value
;
7337 c_parser_consume_token (parser
);
7338 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7341 c_parser_error (parser
, "expected identifier");
7343 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7344 c_parser_error (parser
, "expected %<(%> or end of line");
7345 c_parser_skip_to_pragma_eol (parser
);
7347 stmt
= c_parser_omp_structured_block (parser
);
7348 return c_finish_omp_critical (stmt
, name
);
7352 # pragma omp flush flush-vars[opt] new-line
7355 ( variable-list ) */
7358 c_parser_omp_flush (c_parser
*parser
)
7360 c_parser_consume_pragma (parser
);
7361 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7362 c_parser_omp_var_list_parens (parser
, 0, NULL
);
7363 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7364 c_parser_error (parser
, "expected %<(%> or end of line");
7365 c_parser_skip_to_pragma_eol (parser
);
7367 c_finish_omp_flush ();
7370 /* Parse the restricted form of the for statment allowed by OpenMP.
7371 The real trick here is to determine the loop control variable early
7372 so that we can push a new decl if necessary to make it private. */
7375 c_parser_omp_for_loop (c_parser
*parser
)
7377 tree decl
, cond
, incr
, save_break
, save_cont
, body
, init
;
7380 if (!c_parser_next_token_is_keyword (parser
, RID_FOR
))
7382 c_parser_error (parser
, "for statement expected");
7385 loc
= c_parser_peek_token (parser
)->location
;
7386 c_parser_consume_token (parser
);
7388 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7391 /* Parse the initialization declaration or expression. */
7392 if (c_parser_next_token_starts_declspecs (parser
))
7394 c_parser_declaration_or_fndef (parser
, true, true, true, true);
7395 decl
= check_for_loop_decls ();
7400 else if (c_parser_next_token_is (parser
, CPP_NAME
)
7401 && c_parser_peek_2nd_token (parser
)->type
== CPP_EQ
)
7403 decl
= c_parser_postfix_expression (parser
).value
;
7405 c_parser_require (parser
, CPP_EQ
, "expected %<=%>");
7407 init
= c_parser_expr_no_commas (parser
, NULL
).value
;
7408 init
= build_modify_expr (decl
, NOP_EXPR
, init
);
7409 init
= c_process_expr_stmt (init
);
7411 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7416 /* Parse the loop condition. */
7418 if (c_parser_next_token_is_not (parser
, CPP_SEMICOLON
))
7420 cond
= c_parser_expression_conv (parser
).value
;
7421 cond
= c_objc_common_truthvalue_conversion (cond
);
7423 SET_EXPR_LOCATION (cond
, input_location
);
7425 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7427 /* Parse the increment expression. */
7429 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_PAREN
))
7430 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
7431 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7434 save_break
= c_break_label
;
7435 c_break_label
= size_one_node
;
7436 save_cont
= c_cont_label
;
7437 c_cont_label
= NULL_TREE
;
7438 body
= push_stmt_list ();
7440 add_stmt (c_parser_c99_block_statement (parser
));
7442 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_cont_label
));
7444 body
= pop_stmt_list (body
);
7445 c_break_label
= save_break
;
7446 c_cont_label
= save_cont
;
7448 /* Only bother calling c_finish_omp_for if we havn't already generated
7449 an error from the initialization parsing. */
7450 if (decl
!= NULL
&& decl
!= error_mark_node
&& init
!= error_mark_node
)
7451 return c_finish_omp_for (loc
, decl
, init
, cond
, incr
, body
, NULL
);
7455 c_parser_error (parser
, "expected iteration declaration or initialization");
7456 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7457 decl
= init
= cond
= incr
= NULL_TREE
;
7462 #pragma omp for for-clause[optseq] new-line
7466 #define OMP_FOR_CLAUSE_MASK \
7467 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7468 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7469 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7470 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7471 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7472 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7473 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7476 c_parser_omp_for (c_parser
*parser
)
7478 tree block
, clauses
, ret
;
7480 clauses
= c_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
7483 block
= c_begin_compound_stmt (true);
7484 ret
= c_parser_omp_for_loop (parser
);
7486 OMP_FOR_CLAUSES (ret
) = clauses
;
7487 block
= c_end_compound_stmt (block
, true);
7494 # pragma omp master new-line
7499 c_parser_omp_master (c_parser
*parser
)
7501 c_parser_skip_to_pragma_eol (parser
);
7502 return c_finish_omp_master (c_parser_omp_structured_block (parser
));
7506 # pragma omp ordered new-line
7511 c_parser_omp_ordered (c_parser
*parser
)
7513 c_parser_skip_to_pragma_eol (parser
);
7514 return c_finish_omp_ordered (c_parser_omp_structured_block (parser
));
7520 { section-sequence }
7523 section-directive[opt] structured-block
7524 section-sequence section-directive structured-block */
7527 c_parser_omp_sections_scope (c_parser
*parser
)
7530 bool error_suppress
= false;
7533 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
7535 /* Avoid skipping until the end of the block. */
7536 parser
->error
= false;
7540 stmt
= push_stmt_list ();
7542 loc
= c_parser_peek_token (parser
)->location
;
7543 if (c_parser_peek_token (parser
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
7545 substmt
= push_stmt_list ();
7549 c_parser_statement (parser
);
7551 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
7553 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7555 if (c_parser_next_token_is (parser
, CPP_EOF
))
7559 substmt
= pop_stmt_list (substmt
);
7560 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
7561 SET_EXPR_LOCATION (substmt
, loc
);
7567 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7569 if (c_parser_next_token_is (parser
, CPP_EOF
))
7572 loc
= c_parser_peek_token (parser
)->location
;
7573 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
7575 c_parser_consume_pragma (parser
);
7576 c_parser_skip_to_pragma_eol (parser
);
7577 error_suppress
= false;
7579 else if (!error_suppress
)
7581 error ("expected %<#pragma omp section%> or %<}%>");
7582 error_suppress
= true;
7585 substmt
= c_parser_omp_structured_block (parser
);
7586 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
7587 SET_EXPR_LOCATION (substmt
, loc
);
7590 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
,
7591 "expected %<#pragma omp section%> or %<}%>");
7593 substmt
= pop_stmt_list (stmt
);
7595 stmt
= make_node (OMP_SECTIONS
);
7596 TREE_TYPE (stmt
) = void_type_node
;
7597 OMP_SECTIONS_BODY (stmt
) = substmt
;
7599 return add_stmt (stmt
);
7603 # pragma omp sections sections-clause[optseq] newline
7607 #define OMP_SECTIONS_CLAUSE_MASK \
7608 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7609 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7610 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7611 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7612 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7615 c_parser_omp_sections (c_parser
*parser
)
7617 tree block
, clauses
, ret
;
7619 clauses
= c_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
7620 "#pragma omp sections");
7622 block
= c_begin_compound_stmt (true);
7623 ret
= c_parser_omp_sections_scope (parser
);
7625 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
7626 block
= c_end_compound_stmt (block
, true);
7633 # pragma parallel parallel-clause new-line
7634 # pragma parallel for parallel-for-clause new-line
7635 # pragma parallel sections parallel-sections-clause new-line
7638 #define OMP_PARALLEL_CLAUSE_MASK \
7639 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
7640 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7641 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7642 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
7643 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
7644 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
7645 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7646 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
7649 c_parser_omp_parallel (c_parser
*parser
)
7651 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
7652 const char *p_name
= "#pragma omp parallel";
7653 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
7654 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
7656 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
7658 c_parser_consume_token (parser
);
7659 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
7660 p_name
= "#pragma omp parallel for";
7661 mask
|= OMP_FOR_CLAUSE_MASK
;
7662 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
7664 else if (c_parser_next_token_is (parser
, CPP_NAME
))
7666 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
7667 if (strcmp (p
, "sections") == 0)
7669 c_parser_consume_token (parser
);
7670 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
7671 p_name
= "#pragma omp parallel sections";
7672 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
7673 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
7677 clauses
= c_parser_omp_all_clauses (parser
, mask
, p_name
);
7681 case PRAGMA_OMP_PARALLEL
:
7682 block
= c_begin_omp_parallel ();
7683 c_parser_statement (parser
);
7684 stmt
= c_finish_omp_parallel (clauses
, block
);
7687 case PRAGMA_OMP_PARALLEL_FOR
:
7688 block
= c_begin_omp_parallel ();
7689 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
7690 stmt
= c_parser_omp_for_loop (parser
);
7692 OMP_FOR_CLAUSES (stmt
) = ws_clause
;
7693 stmt
= c_finish_omp_parallel (par_clause
, block
);
7694 OMP_PARALLEL_COMBINED (stmt
) = 1;
7697 case PRAGMA_OMP_PARALLEL_SECTIONS
:
7698 block
= c_begin_omp_parallel ();
7699 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
7700 stmt
= c_parser_omp_sections_scope (parser
);
7702 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
7703 stmt
= c_finish_omp_parallel (par_clause
, block
);
7704 OMP_PARALLEL_COMBINED (stmt
) = 1;
7715 # pragma omp single single-clause[optseq] new-line
7719 #define OMP_SINGLE_CLAUSE_MASK \
7720 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7721 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7722 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
7723 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7726 c_parser_omp_single (c_parser
*parser
)
7728 tree stmt
= make_node (OMP_SINGLE
);
7729 TREE_TYPE (stmt
) = void_type_node
;
7731 OMP_SINGLE_CLAUSES (stmt
)
7732 = c_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
7733 "#pragma omp single");
7734 OMP_SINGLE_BODY (stmt
) = c_parser_omp_structured_block (parser
);
7736 return add_stmt (stmt
);
7740 /* Main entry point to parsing most OpenMP pragmas. */
7743 c_parser_omp_construct (c_parser
*parser
)
7745 enum pragma_kind p_kind
;
7749 loc
= c_parser_peek_token (parser
)->location
;
7750 p_kind
= c_parser_peek_token (parser
)->pragma_kind
;
7751 c_parser_consume_pragma (parser
);
7755 case PRAGMA_OMP_ATOMIC
:
7756 c_parser_omp_atomic (parser
);
7758 case PRAGMA_OMP_CRITICAL
:
7759 stmt
= c_parser_omp_critical (parser
);
7761 case PRAGMA_OMP_FOR
:
7762 stmt
= c_parser_omp_for (parser
);
7764 case PRAGMA_OMP_MASTER
:
7765 stmt
= c_parser_omp_master (parser
);
7767 case PRAGMA_OMP_ORDERED
:
7768 stmt
= c_parser_omp_ordered (parser
);
7770 case PRAGMA_OMP_PARALLEL
:
7771 stmt
= c_parser_omp_parallel (parser
);
7773 case PRAGMA_OMP_SECTIONS
:
7774 stmt
= c_parser_omp_sections (parser
);
7776 case PRAGMA_OMP_SINGLE
:
7777 stmt
= c_parser_omp_single (parser
);
7784 SET_EXPR_LOCATION (stmt
, loc
);
7789 # pragma omp threadprivate (variable-list) */
7792 c_parser_omp_threadprivate (c_parser
*parser
)
7796 c_parser_consume_pragma (parser
);
7797 vars
= c_parser_omp_var_list_parens (parser
, 0, NULL
);
7799 if (!targetm
.have_tls
)
7800 sorry ("threadprivate variables not supported in this target");
7802 /* Mark every variable in VARS to be assigned thread local storage. */
7803 for (t
= vars
; t
; t
= TREE_CHAIN (t
))
7805 tree v
= TREE_PURPOSE (t
);
7807 /* If V had already been marked threadprivate, it doesn't matter
7808 whether it had been used prior to this point. */
7809 if (TREE_USED (v
) && !C_DECL_THREADPRIVATE_P (v
))
7810 error ("%qE declared %<threadprivate%> after first use", v
);
7811 else if (! TREE_STATIC (v
) && ! DECL_EXTERNAL (v
))
7812 error ("automatic variable %qE cannot be %<threadprivate%>", v
);
7813 else if (! COMPLETE_TYPE_P (TREE_TYPE (v
)))
7814 error ("%<threadprivate%> %qE has incomplete type", v
);
7817 if (! DECL_THREAD_LOCAL_P (v
))
7819 DECL_TLS_MODEL (v
) = decl_default_tls_model (v
);
7820 /* If rtl has been already set for this var, call
7821 make_decl_rtl once again, so that encode_section_info
7822 has a chance to look at the new decl flags. */
7823 if (DECL_RTL_SET_P (v
))
7826 C_DECL_THREADPRIVATE_P (v
) = 1;
7830 c_parser_skip_to_pragma_eol (parser
);
7834 /* Parse a single source file. */
7839 /* Use local storage to begin. If the first token is a pragma, parse it.
7840 If it is #pragma GCC pch_preprocess, then this will load a PCH file
7841 which will cause garbage collection. */
7844 memset (&tparser
, 0, sizeof tparser
);
7845 the_parser
= &tparser
;
7847 if (c_parser_peek_token (&tparser
)->pragma_kind
== PRAGMA_GCC_PCH_PREPROCESS
)
7848 c_parser_pragma_pch_preprocess (&tparser
);
7850 the_parser
= GGC_NEW (c_parser
);
7851 *the_parser
= tparser
;
7853 c_parser_translation_unit (the_parser
);
7857 #include "gt-c-parser.h"