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
;
924 c_parser_consume_token (parser
);
928 parser
->error
= false;
931 /* Save the warning flags which are controlled by __extension__. */
934 disable_extension_diagnostics (void)
937 | (warn_pointer_arith
<< 1)
938 | (warn_traditional
<< 2)
941 warn_pointer_arith
= 0;
942 warn_traditional
= 0;
947 /* Restore the warning flags which are controlled by __extension__.
948 FLAGS is the return value from disable_extension_diagnostics. */
951 restore_extension_diagnostics (int flags
)
953 pedantic
= flags
& 1;
954 warn_pointer_arith
= (flags
>> 1) & 1;
955 warn_traditional
= (flags
>> 2) & 1;
956 flag_iso
= (flags
>> 3) & 1;
959 /* Possibly kinds of declarator to parse. */
960 typedef enum c_dtr_syn
{
961 /* A normal declarator with an identifier. */
963 /* An abstract declarator (maybe empty). */
965 /* A parameter declarator: may be either, but after a type name does
966 not redeclare a typedef name as an identifier if it can
967 alternatively be interpreted as a typedef name; see DR#009,
968 applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
969 following DR#249. For example, given a typedef T, "int T" and
970 "int *T" are valid parameter declarations redeclaring T, while
971 "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
972 abstract declarators rather than involving redundant parentheses;
973 the same applies with attributes inside the parentheses before
978 static void c_parser_external_declaration (c_parser
*);
979 static void c_parser_asm_definition (c_parser
*);
980 static void c_parser_declaration_or_fndef (c_parser
*, bool, bool, bool, bool);
981 static void c_parser_declspecs (c_parser
*, struct c_declspecs
*, bool, bool,
983 static struct c_typespec
c_parser_enum_specifier (c_parser
*);
984 static struct c_typespec
c_parser_struct_or_union_specifier (c_parser
*);
985 static tree
c_parser_struct_declaration (c_parser
*);
986 static struct c_typespec
c_parser_typeof_specifier (c_parser
*);
987 static struct c_declarator
*c_parser_declarator (c_parser
*, bool, c_dtr_syn
,
989 static struct c_declarator
*c_parser_direct_declarator (c_parser
*, bool,
991 static struct c_declarator
*c_parser_direct_declarator_inner (c_parser
*,
993 struct c_declarator
*);
994 static struct c_arg_info
*c_parser_parms_declarator (c_parser
*, bool, tree
);
995 static struct c_arg_info
*c_parser_parms_list_declarator (c_parser
*, tree
);
996 static struct c_parm
*c_parser_parameter_declaration (c_parser
*, tree
);
997 static tree
c_parser_simple_asm_expr (c_parser
*);
998 static tree
c_parser_attributes (c_parser
*);
999 static struct c_type_name
*c_parser_type_name (c_parser
*);
1000 static struct c_expr
c_parser_initializer (c_parser
*);
1001 static struct c_expr
c_parser_braced_init (c_parser
*, tree
, bool);
1002 static void c_parser_initelt (c_parser
*);
1003 static void c_parser_initval (c_parser
*, struct c_expr
*);
1004 static tree
c_parser_compound_statement (c_parser
*);
1005 static void c_parser_compound_statement_nostart (c_parser
*);
1006 static void c_parser_label (c_parser
*);
1007 static void c_parser_statement (c_parser
*);
1008 static void c_parser_statement_after_labels (c_parser
*);
1009 static void c_parser_if_statement (c_parser
*);
1010 static void c_parser_switch_statement (c_parser
*);
1011 static void c_parser_while_statement (c_parser
*);
1012 static void c_parser_do_statement (c_parser
*);
1013 static void c_parser_for_statement (c_parser
*);
1014 static tree
c_parser_asm_statement (c_parser
*);
1015 static tree
c_parser_asm_operands (c_parser
*, bool);
1016 static tree
c_parser_asm_clobbers (c_parser
*);
1017 static struct c_expr
c_parser_expr_no_commas (c_parser
*, struct c_expr
*);
1018 static struct c_expr
c_parser_conditional_expression (c_parser
*,
1020 static struct c_expr
c_parser_binary_expression (c_parser
*, struct c_expr
*);
1021 static struct c_expr
c_parser_cast_expression (c_parser
*, struct c_expr
*);
1022 static struct c_expr
c_parser_unary_expression (c_parser
*);
1023 static struct c_expr
c_parser_sizeof_expression (c_parser
*);
1024 static struct c_expr
c_parser_alignof_expression (c_parser
*);
1025 static struct c_expr
c_parser_postfix_expression (c_parser
*);
1026 static struct c_expr
c_parser_postfix_expression_after_paren_type (c_parser
*,
1027 struct c_type_name
*);
1028 static struct c_expr
c_parser_postfix_expression_after_primary (c_parser
*,
1030 static struct c_expr
c_parser_expression (c_parser
*);
1031 static struct c_expr
c_parser_expression_conv (c_parser
*);
1032 static tree
c_parser_expr_list (c_parser
*, bool);
1033 static void c_parser_omp_construct (c_parser
*);
1034 static void c_parser_omp_threadprivate (c_parser
*);
1035 static void c_parser_omp_barrier (c_parser
*);
1036 static void c_parser_omp_flush (c_parser
*);
1038 enum pragma_context
{ pragma_external
, pragma_stmt
, pragma_compound
};
1039 static bool c_parser_pragma (c_parser
*, enum pragma_context
);
1041 /* These Objective-C parser functions are only ever called when
1042 compiling Objective-C. */
1043 static void c_parser_objc_class_definition (c_parser
*);
1044 static void c_parser_objc_class_instance_variables (c_parser
*);
1045 static void c_parser_objc_class_declaration (c_parser
*);
1046 static void c_parser_objc_alias_declaration (c_parser
*);
1047 static void c_parser_objc_protocol_definition (c_parser
*);
1048 static enum tree_code
c_parser_objc_method_type (c_parser
*);
1049 static void c_parser_objc_method_definition (c_parser
*);
1050 static void c_parser_objc_methodprotolist (c_parser
*);
1051 static void c_parser_objc_methodproto (c_parser
*);
1052 static tree
c_parser_objc_method_decl (c_parser
*);
1053 static tree
c_parser_objc_type_name (c_parser
*);
1054 static tree
c_parser_objc_protocol_refs (c_parser
*);
1055 static void c_parser_objc_try_catch_statement (c_parser
*);
1056 static void c_parser_objc_synchronized_statement (c_parser
*);
1057 static tree
c_parser_objc_selector (c_parser
*);
1058 static tree
c_parser_objc_selector_arg (c_parser
*);
1059 static tree
c_parser_objc_receiver (c_parser
*);
1060 static tree
c_parser_objc_message_args (c_parser
*);
1061 static tree
c_parser_objc_keywordexpr (c_parser
*);
1063 /* Parse a translation unit (C90 6.7, C99 6.9).
1066 external-declarations
1068 external-declarations:
1069 external-declaration
1070 external-declarations external-declaration
1079 c_parser_translation_unit (c_parser
*parser
)
1081 if (c_parser_next_token_is (parser
, CPP_EOF
))
1084 pedwarn ("ISO C forbids an empty source file");
1088 void *obstack_position
= obstack_alloc (&parser_obstack
, 0);
1092 c_parser_external_declaration (parser
);
1093 obstack_free (&parser_obstack
, obstack_position
);
1095 while (c_parser_next_token_is_not (parser
, CPP_EOF
));
1099 /* Parse an external declaration (C90 6.7, C99 6.9).
1101 external-declaration:
1107 external-declaration:
1110 __extension__ external-declaration
1114 external-declaration:
1115 objc-class-definition
1116 objc-class-declaration
1117 objc-alias-declaration
1118 objc-protocol-definition
1119 objc-method-definition
1124 c_parser_external_declaration (c_parser
*parser
)
1127 switch (c_parser_peek_token (parser
)->type
)
1130 switch (c_parser_peek_token (parser
)->keyword
)
1133 ext
= disable_extension_diagnostics ();
1134 c_parser_consume_token (parser
);
1135 c_parser_external_declaration (parser
);
1136 restore_extension_diagnostics (ext
);
1139 c_parser_asm_definition (parser
);
1141 case RID_AT_INTERFACE
:
1142 case RID_AT_IMPLEMENTATION
:
1143 gcc_assert (c_dialect_objc ());
1144 c_parser_objc_class_definition (parser
);
1147 gcc_assert (c_dialect_objc ());
1148 c_parser_objc_class_declaration (parser
);
1151 gcc_assert (c_dialect_objc ());
1152 c_parser_objc_alias_declaration (parser
);
1154 case RID_AT_PROTOCOL
:
1155 gcc_assert (c_dialect_objc ());
1156 c_parser_objc_protocol_definition (parser
);
1159 gcc_assert (c_dialect_objc ());
1160 c_parser_consume_token (parser
);
1161 objc_finish_implementation ();
1169 pedwarn ("ISO C does not allow extra %<;%> outside of a function");
1170 c_parser_consume_token (parser
);
1173 c_parser_pragma (parser
, pragma_external
);
1177 if (c_dialect_objc ())
1179 c_parser_objc_method_definition (parser
);
1182 /* Else fall through, and yield a syntax error trying to parse
1183 as a declaration or function definition. */
1186 /* A declaration or a function definition. We can only tell
1187 which after parsing the declaration specifiers, if any, and
1188 the first declarator. */
1189 c_parser_declaration_or_fndef (parser
, true, true, false, true);
1195 /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99
1196 6.7, 6.9.1). If FNDEF_OK is true, a function definition is
1197 accepted; otherwise (old-style parameter declarations) only other
1198 declarations are accepted. If NESTED is true, we are inside a
1199 function or parsing old-style parameter declarations; any functions
1200 encountered are nested functions and declaration specifiers are
1201 required; otherwise we are at top level and functions are normal
1202 functions and declaration specifiers may be optional. If EMPTY_OK
1203 is true, empty declarations are OK (subject to all other
1204 constraints); otherwise (old-style parameter declarations) they are
1205 diagnosed. If START_ATTR_OK is true, the declaration specifiers
1206 may start with attributes; otherwise they may not.
1209 declaration-specifiers init-declarator-list[opt] ;
1211 function-definition:
1212 declaration-specifiers[opt] declarator declaration-list[opt]
1217 declaration-list declaration
1219 init-declarator-list:
1221 init-declarator-list , init-declarator
1224 declarator simple-asm-expr[opt] attributes[opt]
1225 declarator simple-asm-expr[opt] attributes[opt] = initializer
1229 nested-function-definition:
1230 declaration-specifiers declarator declaration-list[opt]
1233 The simple-asm-expr and attributes are GNU extensions.
1235 This function does not handle __extension__; that is handled in its
1236 callers. ??? Following the old parser, __extension__ may start
1237 external declarations, declarations in functions and declarations
1238 at the start of "for" loops, but not old-style parameter
1241 C99 requires declaration specifiers in a function definition; the
1242 absence is diagnosed through the diagnosis of implicit int. In GNU
1243 C we also allow but diagnose declarations without declaration
1244 specifiers, but only at top level (elsewhere they conflict with
1250 threadprivate-directive */
1253 c_parser_declaration_or_fndef (c_parser
*parser
, bool fndef_ok
, bool empty_ok
,
1254 bool nested
, bool start_attr_ok
)
1256 struct c_declspecs
*specs
;
1258 tree all_prefix_attrs
;
1259 bool diagnosed_no_specs
= false;
1261 specs
= build_null_declspecs ();
1262 c_parser_declspecs (parser
, specs
, true, true, start_attr_ok
);
1265 c_parser_skip_to_end_of_block_or_statement (parser
);
1268 if (nested
&& !specs
->declspecs_seen_p
)
1270 c_parser_error (parser
, "expected declaration specifiers");
1271 c_parser_skip_to_end_of_block_or_statement (parser
);
1274 finish_declspecs (specs
);
1275 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1281 shadow_tag_warned (specs
, 1);
1282 pedwarn ("empty declaration");
1284 c_parser_consume_token (parser
);
1287 pending_xref_error ();
1288 prefix_attrs
= specs
->attrs
;
1289 all_prefix_attrs
= prefix_attrs
;
1290 specs
->attrs
= NULL_TREE
;
1293 struct c_declarator
*declarator
;
1296 /* Declaring either one or more declarators (in which case we
1297 should diagnose if there were no declaration specifiers) or a
1298 function definition (in which case the diagnostic for
1299 implicit int suffices). */
1300 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
1301 C_DTR_NORMAL
, &dummy
);
1302 if (declarator
== NULL
)
1304 c_parser_skip_to_end_of_block_or_statement (parser
);
1307 if (c_parser_next_token_is (parser
, CPP_EQ
)
1308 || c_parser_next_token_is (parser
, CPP_COMMA
)
1309 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
1310 || c_parser_next_token_is_keyword (parser
, RID_ASM
)
1311 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1313 tree asm_name
= NULL_TREE
;
1314 tree postfix_attrs
= NULL_TREE
;
1315 if (!diagnosed_no_specs
&& !specs
->declspecs_seen_p
)
1317 diagnosed_no_specs
= true;
1318 pedwarn ("data definition has no type or storage class");
1320 /* Having seen a data definition, there cannot now be a
1321 function definition. */
1323 if (c_parser_next_token_is_keyword (parser
, RID_ASM
))
1324 asm_name
= c_parser_simple_asm_expr (parser
);
1325 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1326 postfix_attrs
= c_parser_attributes (parser
);
1327 if (c_parser_next_token_is (parser
, CPP_EQ
))
1331 c_parser_consume_token (parser
);
1332 /* The declaration of the variable is in effect while
1333 its initializer is parsed. */
1334 d
= start_decl (declarator
, specs
, true,
1335 chainon (postfix_attrs
, all_prefix_attrs
));
1337 d
= error_mark_node
;
1338 start_init (d
, asm_name
, global_bindings_p ());
1339 init
= c_parser_initializer (parser
);
1341 if (d
!= error_mark_node
)
1343 maybe_warn_string_init (TREE_TYPE (d
), init
);
1344 finish_decl (d
, init
.value
, asm_name
);
1349 tree d
= start_decl (declarator
, specs
, false,
1350 chainon (postfix_attrs
,
1353 finish_decl (d
, NULL_TREE
, asm_name
);
1355 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1357 c_parser_consume_token (parser
);
1358 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1359 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
1362 all_prefix_attrs
= prefix_attrs
;
1365 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1367 c_parser_consume_token (parser
);
1372 c_parser_error (parser
, "expected %<,%> or %<;%>");
1373 c_parser_skip_to_end_of_block_or_statement (parser
);
1379 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, "
1380 "%<asm%> or %<__attribute__%>");
1381 c_parser_skip_to_end_of_block_or_statement (parser
);
1384 /* Function definition (nested or otherwise). */
1388 pedwarn ("ISO C forbids nested functions");
1389 push_function_context ();
1391 if (!start_function (specs
, declarator
, all_prefix_attrs
))
1393 /* This can appear in many cases looking nothing like a
1394 function definition, so we don't give a more specific
1395 error suggesting there was one. */
1396 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, %<asm%> "
1397 "or %<__attribute__%>");
1399 pop_function_context ();
1402 /* Parse old-style parameter declarations. ??? Attributes are
1403 not allowed to start declaration specifiers here because of a
1404 syntax conflict between a function declaration with attribute
1405 suffix and a function definition with an attribute prefix on
1406 first old-style parameter declaration. Following the old
1407 parser, they are not accepted on subsequent old-style
1408 parameter declarations either. However, there is no
1409 ambiguity after the first declaration, nor indeed on the
1410 first as long as we don't allow postfix attributes after a
1411 declarator with a nonempty identifier list in a definition;
1412 and postfix attributes have never been accepted here in
1413 function definitions either. */
1414 while (c_parser_next_token_is_not (parser
, CPP_EOF
)
1415 && c_parser_next_token_is_not (parser
, CPP_OPEN_BRACE
))
1416 c_parser_declaration_or_fndef (parser
, false, false, true, false);
1417 DECL_SOURCE_LOCATION (current_function_decl
)
1418 = c_parser_peek_token (parser
)->location
;
1419 store_parm_decls ();
1420 fnbody
= c_parser_compound_statement (parser
);
1423 tree decl
= current_function_decl
;
1426 pop_function_context ();
1427 add_stmt (build_stmt (DECL_EXPR
, decl
));
1438 /* Parse an asm-definition (asm() outside a function body). This is a
1446 c_parser_asm_definition (c_parser
*parser
)
1448 tree asm_str
= c_parser_simple_asm_expr (parser
);
1450 cgraph_add_asm_node (asm_str
);
1451 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
1454 /* Parse some declaration specifiers (possibly none) (C90 6.5, C99
1455 6.7), adding them to SPECS (which may already include some).
1456 Storage class specifiers are accepted iff SCSPEC_OK; type
1457 specifiers are accepted iff TYPESPEC_OK; attributes are accepted at
1458 the start iff START_ATTR_OK.
1460 declaration-specifiers:
1461 storage-class-specifier declaration-specifiers[opt]
1462 type-specifier declaration-specifiers[opt]
1463 type-qualifier declaration-specifiers[opt]
1464 function-specifier declaration-specifiers[opt]
1466 Function specifiers (inline) are from C99, and are currently
1467 handled as storage class specifiers, as is __thread.
1469 C90 6.5.1, C99 6.7.1:
1470 storage-class-specifier:
1481 C90 6.5.2, C99 6.7.2:
1494 [_Imaginary removed in C99 TC2]
1495 struct-or-union-specifier
1499 (_Bool and _Complex are new in C99.)
1501 C90 6.5.3, C99 6.7.3:
1508 (restrict is new in C99.)
1512 declaration-specifiers:
1513 attributes declaration-specifiers[opt]
1515 storage-class-specifier:
1527 class-name objc-protocol-refs[opt]
1528 typedef-name objc-protocol-refs
1533 c_parser_declspecs (c_parser
*parser
, struct c_declspecs
*specs
,
1534 bool scspec_ok
, bool typespec_ok
, bool start_attr_ok
)
1536 bool attrs_ok
= start_attr_ok
;
1537 bool seen_type
= specs
->type_seen_p
;
1538 while (c_parser_next_token_is (parser
, CPP_NAME
)
1539 || c_parser_next_token_is (parser
, CPP_KEYWORD
)
1540 || (c_dialect_objc () && c_parser_next_token_is (parser
, CPP_LESS
)))
1542 struct c_typespec t
;
1544 if (c_parser_next_token_is (parser
, CPP_NAME
))
1546 tree value
= c_parser_peek_token (parser
)->value
;
1547 c_id_kind kind
= c_parser_peek_token (parser
)->id_kind
;
1548 /* This finishes the specifiers unless a type name is OK, it
1549 is declared as a type name and a type name hasn't yet
1551 if (!typespec_ok
|| seen_type
1552 || (kind
!= C_ID_TYPENAME
&& kind
!= C_ID_CLASSNAME
))
1554 c_parser_consume_token (parser
);
1557 if (kind
== C_ID_TYPENAME
1558 && (!c_dialect_objc ()
1559 || c_parser_next_token_is_not (parser
, CPP_LESS
)))
1561 t
.kind
= ctsk_typedef
;
1562 /* For a typedef name, record the meaning, not the name.
1563 In case of 'foo foo, bar;'. */
1564 t
.spec
= lookup_name (value
);
1568 tree proto
= NULL_TREE
;
1569 gcc_assert (c_dialect_objc ());
1571 if (c_parser_next_token_is (parser
, CPP_LESS
))
1572 proto
= c_parser_objc_protocol_refs (parser
);
1573 t
.spec
= objc_get_protocol_qualified_type (value
, proto
);
1575 declspecs_add_type (specs
, t
);
1578 if (c_parser_next_token_is (parser
, CPP_LESS
))
1580 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
1581 nisse@lysator.liu.se. */
1583 gcc_assert (c_dialect_objc ());
1584 if (!typespec_ok
|| seen_type
)
1586 proto
= c_parser_objc_protocol_refs (parser
);
1588 t
.spec
= objc_get_protocol_qualified_type (NULL_TREE
, proto
);
1589 declspecs_add_type (specs
, t
);
1592 gcc_assert (c_parser_next_token_is (parser
, CPP_KEYWORD
));
1593 switch (c_parser_peek_token (parser
)->keyword
)
1605 /* TODO: Distinguish between function specifiers (inline)
1606 and storage class specifiers, either here or in
1607 declspecs_add_scspec. */
1608 declspecs_add_scspec (specs
, c_parser_peek_token (parser
)->value
);
1609 c_parser_consume_token (parser
);
1629 OBJC_NEED_RAW_IDENTIFIER (1);
1630 t
.kind
= ctsk_resword
;
1631 t
.spec
= c_parser_peek_token (parser
)->value
;
1632 declspecs_add_type (specs
, t
);
1633 c_parser_consume_token (parser
);
1640 t
= c_parser_enum_specifier (parser
);
1641 declspecs_add_type (specs
, t
);
1649 t
= c_parser_struct_or_union_specifier (parser
);
1650 declspecs_add_type (specs
, t
);
1653 /* ??? The old parser rejected typeof after other type
1654 specifiers, but is a syntax error the best way of
1656 if (!typespec_ok
|| seen_type
)
1660 t
= c_parser_typeof_specifier (parser
);
1661 declspecs_add_type (specs
, t
);
1667 declspecs_add_qual (specs
, c_parser_peek_token (parser
)->value
);
1668 c_parser_consume_token (parser
);
1673 attrs
= c_parser_attributes (parser
);
1674 declspecs_add_attrs (specs
, attrs
);
1683 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
1686 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
1687 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
1688 enum attributes[opt] identifier
1690 The form with trailing comma is new in C99. The forms with
1691 attributes are GNU extensions. In GNU C, we accept any expression
1692 without commas in the syntax (assignment expressions, not just
1693 conditional expressions); assignment expressions will be diagnosed
1698 enumerator-list , enumerator
1701 enumeration-constant
1702 enumeration-constant = constant-expression
1705 static struct c_typespec
1706 c_parser_enum_specifier (c_parser
*parser
)
1708 struct c_typespec ret
;
1710 tree ident
= NULL_TREE
;
1711 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ENUM
));
1712 c_parser_consume_token (parser
);
1713 attrs
= c_parser_attributes (parser
);
1714 if (c_parser_next_token_is (parser
, CPP_NAME
))
1716 ident
= c_parser_peek_token (parser
)->value
;
1717 c_parser_consume_token (parser
);
1719 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
1721 /* Parse an enum definition. */
1722 tree type
= start_enum (ident
);
1724 /* We chain the enumerators in reverse order, then put them in
1725 forward order at the end. */
1726 tree values
= NULL_TREE
;
1727 c_parser_consume_token (parser
);
1734 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
1736 c_parser_error (parser
, "expected identifier");
1737 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1738 values
= error_mark_node
;
1741 enum_id
= c_parser_peek_token (parser
)->value
;
1742 c_parser_consume_token (parser
);
1743 if (c_parser_next_token_is (parser
, CPP_EQ
))
1745 c_parser_consume_token (parser
);
1746 enum_value
= c_parser_expr_no_commas (parser
, NULL
).value
;
1749 enum_value
= NULL_TREE
;
1750 enum_decl
= build_enumerator (enum_id
, enum_value
);
1751 TREE_CHAIN (enum_decl
) = values
;
1754 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1757 c_parser_consume_token (parser
);
1759 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1761 if (seen_comma
&& pedantic
&& !flag_isoc99
)
1762 pedwarn ("comma at end of enumerator list");
1763 c_parser_consume_token (parser
);
1768 c_parser_error (parser
, "expected %<,%> or %<}%>");
1769 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1770 values
= error_mark_node
;
1774 postfix_attrs
= c_parser_attributes (parser
);
1775 ret
.spec
= finish_enum (type
, nreverse (values
),
1776 chainon (attrs
, postfix_attrs
));
1777 ret
.kind
= ctsk_tagdef
;
1782 c_parser_error (parser
, "expected %<{%>");
1783 ret
.spec
= error_mark_node
;
1784 ret
.kind
= ctsk_tagref
;
1787 ret
= parser_xref_tag (ENUMERAL_TYPE
, ident
);
1788 /* In ISO C, enumerated types can be referred to only if already
1790 if (pedantic
&& !COMPLETE_TYPE_P (ret
.spec
))
1791 pedwarn ("ISO C forbids forward references to %<enum%> types");
1795 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
1797 struct-or-union-specifier:
1798 struct-or-union attributes[opt] identifier[opt]
1799 { struct-contents } attributes[opt]
1800 struct-or-union attributes[opt] identifier
1803 struct-declaration-list
1805 struct-declaration-list:
1806 struct-declaration ;
1807 struct-declaration-list struct-declaration ;
1814 struct-declaration-list struct-declaration
1816 struct-declaration-list:
1817 struct-declaration-list ;
1820 (Note that in the syntax here, unlike that in ISO C, the semicolons
1821 are included here rather than in struct-declaration, in order to
1822 describe the syntax with extra semicolons and missing semicolon at
1827 struct-declaration-list:
1828 @defs ( class-name )
1830 (Note this does not include a trailing semicolon, but can be
1831 followed by further declarations, and gets a pedwarn-if-pedantic
1832 when followed by a semicolon.) */
1834 static struct c_typespec
1835 c_parser_struct_or_union_specifier (c_parser
*parser
)
1837 struct c_typespec ret
;
1839 tree ident
= NULL_TREE
;
1840 enum tree_code code
;
1841 switch (c_parser_peek_token (parser
)->keyword
)
1852 c_parser_consume_token (parser
);
1853 attrs
= c_parser_attributes (parser
);
1854 if (c_parser_next_token_is (parser
, CPP_NAME
))
1856 ident
= c_parser_peek_token (parser
)->value
;
1857 c_parser_consume_token (parser
);
1859 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
1861 /* Parse a struct or union definition. Start the scope of the
1862 tag before parsing components. */
1863 tree type
= start_struct (code
, ident
);
1865 /* We chain the components in reverse order, then put them in
1866 forward order at the end. Each struct-declaration may
1867 declare multiple components (comma-separated), so we must use
1868 chainon to join them, although when parsing each
1869 struct-declaration we can use TREE_CHAIN directly.
1871 The theory behind all this is that there will be more
1872 semicolon separated fields than comma separated fields, and
1873 so we'll be minimizing the number of node traversals required
1875 tree contents
= NULL_TREE
;
1876 c_parser_consume_token (parser
);
1877 /* Handle the Objective-C @defs construct,
1878 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
1879 if (c_parser_next_token_is_keyword (parser
, RID_AT_DEFS
))
1882 gcc_assert (c_dialect_objc ());
1883 c_parser_consume_token (parser
);
1884 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
1886 if (c_parser_next_token_is (parser
, CPP_NAME
)
1887 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
)
1889 name
= c_parser_peek_token (parser
)->value
;
1890 c_parser_consume_token (parser
);
1894 c_parser_error (parser
, "expected class name");
1895 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
1898 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
1900 contents
= nreverse (objc_get_class_ivars (name
));
1903 /* Parse the struct-declarations and semicolons. Problems with
1904 semicolons are diagnosed here; empty structures are diagnosed
1909 /* Parse any stray semicolon. */
1910 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1913 pedwarn ("extra semicolon in struct or union specified");
1914 c_parser_consume_token (parser
);
1917 /* Stop if at the end of the struct or union contents. */
1918 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1920 c_parser_consume_token (parser
);
1923 /* Accept #pragmas at struct scope. */
1924 if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
1926 c_parser_pragma (parser
, pragma_external
);
1929 /* Parse some comma-separated declarations, but not the
1930 trailing semicolon if any. */
1931 decls
= c_parser_struct_declaration (parser
);
1932 contents
= chainon (decls
, contents
);
1933 /* If no semicolon follows, either we have a parse error or
1934 are at the end of the struct or union and should
1936 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1937 c_parser_consume_token (parser
);
1940 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1941 pedwarn ("no semicolon at end of struct or union");
1944 c_parser_error (parser
, "expected %<;%>");
1945 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1950 postfix_attrs
= c_parser_attributes (parser
);
1951 ret
.spec
= finish_struct (type
, nreverse (contents
),
1952 chainon (attrs
, postfix_attrs
));
1953 ret
.kind
= ctsk_tagdef
;
1958 c_parser_error (parser
, "expected %<{%>");
1959 ret
.spec
= error_mark_node
;
1960 ret
.kind
= ctsk_tagref
;
1963 ret
= parser_xref_tag (code
, ident
);
1967 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
1968 the trailing semicolon.
1971 specifier-qualifier-list struct-declarator-list
1973 specifier-qualifier-list:
1974 type-specifier specifier-qualifier-list[opt]
1975 type-qualifier specifier-qualifier-list[opt]
1976 attributes specifier-qualifier-list[opt]
1978 struct-declarator-list:
1980 struct-declarator-list , attributes[opt] struct-declarator
1983 declarator attributes[opt]
1984 declarator[opt] : constant-expression attributes[opt]
1989 __extension__ struct-declaration
1990 specifier-qualifier-list
1992 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
1993 of attributes where shown is a GNU extension. In GNU C, we accept
1994 any expression without commas in the syntax (assignment
1995 expressions, not just conditional expressions); assignment
1996 expressions will be diagnosed as non-constant. */
1999 c_parser_struct_declaration (c_parser
*parser
)
2001 struct c_declspecs
*specs
;
2003 tree all_prefix_attrs
;
2005 if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
2009 ext
= disable_extension_diagnostics ();
2010 c_parser_consume_token (parser
);
2011 decl
= c_parser_struct_declaration (parser
);
2012 restore_extension_diagnostics (ext
);
2015 specs
= build_null_declspecs ();
2016 c_parser_declspecs (parser
, specs
, false, true, true);
2019 if (!specs
->declspecs_seen_p
)
2021 c_parser_error (parser
, "expected specifier-qualifier-list");
2024 finish_declspecs (specs
);
2025 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2028 if (!specs
->type_seen_p
)
2031 pedwarn ("ISO C forbids member declarations with no members");
2032 shadow_tag_warned (specs
, pedantic
);
2037 /* Support for unnamed structs or unions as members of
2038 structs or unions (which is [a] useful and [b] supports
2040 ret
= grokfield (build_id_declarator (NULL_TREE
), specs
, NULL_TREE
);
2044 pending_xref_error ();
2045 prefix_attrs
= specs
->attrs
;
2046 all_prefix_attrs
= prefix_attrs
;
2047 specs
->attrs
= NULL_TREE
;
2051 /* Declaring one or more declarators or un-named bit-fields. */
2052 struct c_declarator
*declarator
;
2054 if (c_parser_next_token_is (parser
, CPP_COLON
))
2055 declarator
= build_id_declarator (NULL_TREE
);
2057 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2058 C_DTR_NORMAL
, &dummy
);
2059 if (declarator
== NULL
)
2061 c_parser_skip_to_end_of_block_or_statement (parser
);
2064 if (c_parser_next_token_is (parser
, CPP_COLON
)
2065 || c_parser_next_token_is (parser
, CPP_COMMA
)
2066 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2067 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
)
2068 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2070 tree postfix_attrs
= NULL_TREE
;
2071 tree width
= NULL_TREE
;
2073 if (c_parser_next_token_is (parser
, CPP_COLON
))
2075 c_parser_consume_token (parser
);
2076 width
= c_parser_expr_no_commas (parser
, NULL
).value
;
2078 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2079 postfix_attrs
= c_parser_attributes (parser
);
2080 d
= grokfield (declarator
, specs
, width
);
2081 decl_attributes (&d
, chainon (postfix_attrs
,
2082 all_prefix_attrs
), 0);
2083 TREE_CHAIN (d
) = decls
;
2085 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2086 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
2089 all_prefix_attrs
= prefix_attrs
;
2090 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2091 c_parser_consume_token (parser
);
2092 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2093 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2095 /* Semicolon consumed in caller. */
2100 c_parser_error (parser
, "expected %<,%>, %<;%> or %<}%>");
2106 c_parser_error (parser
,
2107 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2108 "%<__attribute__%>");
2115 /* Parse a typeof specifier (a GNU extension).
2118 typeof ( expression )
2119 typeof ( type-name )
2122 static struct c_typespec
2123 c_parser_typeof_specifier (c_parser
*parser
)
2125 struct c_typespec ret
;
2126 ret
.kind
= ctsk_typeof
;
2127 ret
.spec
= error_mark_node
;
2128 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TYPEOF
));
2129 c_parser_consume_token (parser
);
2132 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2138 if (c_parser_next_token_starts_typename (parser
))
2140 struct c_type_name
*type
= c_parser_type_name (parser
);
2145 ret
.spec
= groktypename (type
);
2146 pop_maybe_used (variably_modified_type_p (ret
.spec
, NULL_TREE
));
2152 struct c_expr expr
= c_parser_expression (parser
);
2155 if (TREE_CODE (expr
.value
) == COMPONENT_REF
2156 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
2157 error ("%<typeof%> applied to a bit-field");
2158 ret
.spec
= TREE_TYPE (expr
.value
);
2159 was_vm
= variably_modified_type_p (ret
.spec
, NULL_TREE
);
2160 /* This should be returned with the type so that when the type
2161 is evaluated, this can be evaluated. For now, we avoid
2162 evaluation when the context might. */
2163 if (!skip_evaluation
&& was_vm
)
2164 c_finish_expr_stmt (expr
.value
);
2165 pop_maybe_used (was_vm
);
2167 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
2171 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2172 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2173 be redeclared; otherwise it may not. KIND indicates which kind of
2174 declarator is wanted. Returns a valid declarator except in the
2175 case of a syntax error in which case NULL is returned. *SEEN_ID is
2176 set to true if an identifier being declared is seen; this is used
2177 to diagnose bad forms of abstract array declarators and to
2178 determine whether an identifier list is syntactically permitted.
2181 pointer[opt] direct-declarator
2185 ( attributes[opt] declarator )
2186 direct-declarator array-declarator
2187 direct-declarator ( parameter-type-list )
2188 direct-declarator ( identifier-list[opt] )
2191 * type-qualifier-list[opt]
2192 * type-qualifier-list[opt] pointer
2194 type-qualifier-list:
2197 type-qualifier-list type-qualifier
2198 type-qualifier-list attributes
2200 parameter-type-list:
2202 parameter-list , ...
2205 parameter-declaration
2206 parameter-list , parameter-declaration
2208 parameter-declaration:
2209 declaration-specifiers declarator attributes[opt]
2210 declaration-specifiers abstract-declarator[opt] attributes[opt]
2214 identifier-list , identifier
2216 abstract-declarator:
2218 pointer[opt] direct-abstract-declarator
2220 direct-abstract-declarator:
2221 ( attributes[opt] abstract-declarator )
2222 direct-abstract-declarator[opt] array-declarator
2223 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2228 direct-declarator ( parameter-forward-declarations
2229 parameter-type-list[opt] )
2231 direct-abstract-declarator:
2232 direct-abstract-declarator[opt] ( parameter-forward-declarations
2233 parameter-type-list[opt] )
2235 parameter-forward-declarations:
2237 parameter-forward-declarations parameter-list ;
2239 The uses of attributes shown above are GNU extensions.
2241 Some forms of array declarator are not included in C99 in the
2242 syntax for abstract declarators; these are disallowed elsewhere.
2243 This may be a defect (DR#289).
2245 This function also accepts an omitted abstract declarator as being
2246 an abstract declarator, although not part of the formal syntax. */
2248 static struct c_declarator
*
2249 c_parser_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2252 /* Parse any initial pointer part. */
2253 if (c_parser_next_token_is (parser
, CPP_MULT
))
2255 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2256 struct c_declarator
*inner
;
2257 c_parser_consume_token (parser
);
2258 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2259 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2263 return make_pointer_declarator (quals_attrs
, inner
);
2265 /* Now we have a direct declarator, direct abstract declarator or
2266 nothing (which counts as a direct abstract declarator here). */
2267 return c_parser_direct_declarator (parser
, type_seen_p
, kind
, seen_id
);
2270 /* Parse a direct declarator or direct abstract declarator; arguments
2271 as c_parser_declarator. */
2273 static struct c_declarator
*
2274 c_parser_direct_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2277 /* The direct declarator must start with an identifier (possibly
2278 omitted) or a parenthesized declarator (possibly abstract). In
2279 an ordinary declarator, initial parentheses must start a
2280 parenthesized declarator. In an abstract declarator or parameter
2281 declarator, they could start a parenthesized declarator or a
2282 parameter list. To tell which, the open parenthesis and any
2283 following attributes must be read. If a declaration specifier
2284 follows, then it is a parameter list; if the specifier is a
2285 typedef name, there might be an ambiguity about redeclaring it,
2286 which is resolved in the direction of treating it as a typedef
2287 name. If a close parenthesis follows, it is also an empty
2288 parameter list, as the syntax does not permit empty abstract
2289 declarators. Otherwise, it is a parenthesized declarator (in
2290 which case the analysis may be repeated inside it, recursively).
2292 ??? There is an ambiguity in a parameter declaration "int
2293 (__attribute__((foo)) x)", where x is not a typedef name: it
2294 could be an abstract declarator for a function, or declare x with
2295 parentheses. The proper resolution of this ambiguity needs
2296 documenting. At present we follow an accident of the old
2297 parser's implementation, whereby the first parameter must have
2298 some declaration specifiers other than just attributes. Thus as
2299 a parameter declaration it is treated as a parenthesized
2300 parameter named x, and as an abstract declarator it is
2303 ??? Also following the old parser, attributes inside an empty
2304 parameter list are ignored, making it a list not yielding a
2305 prototype, rather than giving an error or making it have one
2306 parameter with implicit type int.
2308 ??? Also following the old parser, typedef names may be
2309 redeclared in declarators, but not Objective-C class names. */
2311 if (kind
!= C_DTR_ABSTRACT
2312 && c_parser_next_token_is (parser
, CPP_NAME
)
2314 && c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
)
2315 || c_parser_peek_token (parser
)->id_kind
== C_ID_ID
))
2317 struct c_declarator
*inner
2318 = build_id_declarator (c_parser_peek_token (parser
)->value
);
2320 inner
->id_loc
= c_parser_peek_token (parser
)->location
;
2321 c_parser_consume_token (parser
);
2322 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2325 if (kind
!= C_DTR_NORMAL
2326 && c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2328 struct c_declarator
*inner
= build_id_declarator (NULL_TREE
);
2329 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2332 /* Either we are at the end of an abstract declarator, or we have
2335 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2338 struct c_declarator
*inner
;
2339 c_parser_consume_token (parser
);
2340 attrs
= c_parser_attributes (parser
);
2341 if (kind
!= C_DTR_NORMAL
2342 && (c_parser_next_token_starts_declspecs (parser
)
2343 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
)))
2345 struct c_arg_info
*args
2346 = c_parser_parms_declarator (parser
, kind
== C_DTR_NORMAL
,
2353 = build_function_declarator (args
,
2354 build_id_declarator (NULL_TREE
));
2355 return c_parser_direct_declarator_inner (parser
, *seen_id
,
2359 /* A parenthesized declarator. */
2360 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2361 if (inner
!= NULL
&& attrs
!= NULL
)
2362 inner
= build_attrs_declarator (attrs
, inner
);
2363 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2365 c_parser_consume_token (parser
);
2369 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2373 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2380 if (kind
== C_DTR_NORMAL
)
2382 c_parser_error (parser
, "expected identifier or %<(%>");
2386 return build_id_declarator (NULL_TREE
);
2390 /* Parse part of a direct declarator or direct abstract declarator,
2391 given that some (in INNER) has already been parsed; ID_PRESENT is
2392 true if an identifier is present, false for an abstract
2395 static struct c_declarator
*
2396 c_parser_direct_declarator_inner (c_parser
*parser
, bool id_present
,
2397 struct c_declarator
*inner
)
2399 /* Parse a sequence of array declarators and parameter lists. */
2400 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2402 struct c_declarator
*declarator
;
2403 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2407 c_parser_consume_token (parser
);
2408 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2409 static_seen
= c_parser_next_token_is_keyword (parser
, RID_STATIC
);
2411 c_parser_consume_token (parser
);
2412 if (static_seen
&& !quals_attrs
->declspecs_seen_p
)
2413 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2414 if (!quals_attrs
->declspecs_seen_p
)
2416 /* If "static" is present, there must be an array dimension.
2417 Otherwise, there may be a dimension, "*", or no
2422 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2426 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2431 else if (c_parser_next_token_is (parser
, CPP_MULT
))
2433 if (c_parser_peek_2nd_token (parser
)->type
== CPP_CLOSE_SQUARE
)
2437 c_parser_consume_token (parser
);
2442 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2448 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2451 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2452 c_parser_consume_token (parser
);
2455 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
2459 declarator
= build_array_declarator (dimen
, quals_attrs
, static_seen
,
2461 if (declarator
== NULL
)
2463 inner
= set_array_declarator_inner (declarator
, inner
, !id_present
);
2464 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
2466 else if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2469 struct c_arg_info
*args
;
2470 c_parser_consume_token (parser
);
2471 attrs
= c_parser_attributes (parser
);
2472 args
= c_parser_parms_declarator (parser
, id_present
, attrs
);
2477 inner
= build_function_declarator (args
, inner
);
2478 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
2484 /* Parse a parameter list or identifier list, including the closing
2485 parenthesis but not the opening one. ATTRS are the attributes at
2486 the start of the list. ID_LIST_OK is true if an identifier list is
2487 acceptable; such a list must not have attributes at the start. */
2489 static struct c_arg_info
*
2490 c_parser_parms_declarator (c_parser
*parser
, bool id_list_ok
, tree attrs
)
2493 declare_parm_level ();
2494 /* If the list starts with an identifier, it is an identifier list.
2495 Otherwise, it is either a prototype list or an empty list. */
2498 && c_parser_next_token_is (parser
, CPP_NAME
)
2499 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
2501 tree list
= NULL_TREE
, *nextp
= &list
;
2502 while (c_parser_next_token_is (parser
, CPP_NAME
)
2503 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
2505 *nextp
= build_tree_list (NULL_TREE
,
2506 c_parser_peek_token (parser
)->value
);
2507 nextp
= & TREE_CHAIN (*nextp
);
2508 c_parser_consume_token (parser
);
2509 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
2511 c_parser_consume_token (parser
);
2512 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2514 c_parser_error (parser
, "expected identifier");
2518 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2520 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2525 ret
->had_vla_unspec
= 0;
2526 c_parser_consume_token (parser
);
2532 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2540 struct c_arg_info
*ret
= c_parser_parms_list_declarator (parser
, attrs
);
2546 /* Parse a parameter list (possibly empty), including the closing
2547 parenthesis but not the opening one. ATTRS are the attributes at
2548 the start of the list. */
2550 static struct c_arg_info
*
2551 c_parser_parms_list_declarator (c_parser
*parser
, tree attrs
)
2553 bool good_parm
= false;
2554 /* ??? Following the old parser, forward parameter declarations may
2555 use abstract declarators, and if no real parameter declarations
2556 follow the forward declarations then this is not diagnosed. Also
2557 note as above that attributes are ignored as the only contents of
2558 the parentheses, or as the only contents after forward
2560 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2562 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2567 ret
->had_vla_unspec
= 0;
2568 c_parser_consume_token (parser
);
2571 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2573 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2577 ret
->had_vla_unspec
= 0;
2578 /* Suppress -Wold-style-definition for this case. */
2579 ret
->types
= error_mark_node
;
2580 error ("ISO C requires a named argument before %<...%>");
2581 c_parser_consume_token (parser
);
2582 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2584 c_parser_consume_token (parser
);
2589 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2594 /* Nonempty list of parameters, either terminated with semicolon
2595 (forward declarations; recurse) or with close parenthesis (normal
2596 function) or with ", ... )" (variadic function). */
2599 /* Parse a parameter. */
2600 struct c_parm
*parm
= c_parser_parameter_declaration (parser
, attrs
);
2605 push_parm_decl (parm
);
2607 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2610 c_parser_consume_token (parser
);
2611 mark_forward_parm_decls ();
2612 new_attrs
= c_parser_attributes (parser
);
2613 return c_parser_parms_list_declarator (parser
, new_attrs
);
2615 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2617 c_parser_consume_token (parser
);
2619 return get_parm_info (false);
2622 struct c_arg_info
*ret
2623 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2628 ret
->had_vla_unspec
= 0;
2632 if (!c_parser_require (parser
, CPP_COMMA
,
2633 "expected %<;%>, %<,%> or %<)%>"))
2635 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2638 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2640 c_parser_consume_token (parser
);
2641 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2643 c_parser_consume_token (parser
);
2645 return get_parm_info (true);
2648 struct c_arg_info
*ret
2649 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2654 ret
->had_vla_unspec
= 0;
2660 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2668 /* Parse a parameter declaration. ATTRS are the attributes at the
2669 start of the declaration if it is the first parameter. */
2671 static struct c_parm
*
2672 c_parser_parameter_declaration (c_parser
*parser
, tree attrs
)
2674 struct c_declspecs
*specs
;
2675 struct c_declarator
*declarator
;
2677 tree postfix_attrs
= NULL_TREE
;
2679 if (!c_parser_next_token_starts_declspecs (parser
))
2681 /* ??? In some Objective-C cases '...' isn't applicable so there
2682 should be a different message. */
2683 c_parser_error (parser
,
2684 "expected declaration specifiers or %<...%>");
2685 c_parser_skip_to_end_of_parameter (parser
);
2688 specs
= build_null_declspecs ();
2691 declspecs_add_attrs (specs
, attrs
);
2694 c_parser_declspecs (parser
, specs
, true, true, true);
2695 finish_declspecs (specs
);
2696 pending_xref_error ();
2697 prefix_attrs
= specs
->attrs
;
2698 specs
->attrs
= NULL_TREE
;
2699 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2700 C_DTR_PARM
, &dummy
);
2701 if (declarator
== NULL
)
2703 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
2706 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2707 postfix_attrs
= c_parser_attributes (parser
);
2708 return build_c_parm (specs
, chainon (postfix_attrs
, prefix_attrs
),
2712 /* Parse a string literal in an asm expression. It should not be
2713 translated, and wide string literals are an error although
2714 permitted by the syntax. This is a GNU extension.
2719 ??? At present, following the old parser, the caller needs to have
2720 set c_lex_string_translate to 0. It would be better to follow the
2721 C++ parser rather than using the c_lex_string_translate kludge. */
2724 c_parser_asm_string_literal (c_parser
*parser
)
2727 if (c_parser_next_token_is (parser
, CPP_STRING
))
2729 str
= c_parser_peek_token (parser
)->value
;
2730 c_parser_consume_token (parser
);
2732 else if (c_parser_next_token_is (parser
, CPP_WSTRING
))
2734 error ("wide string literal in %<asm%>");
2735 str
= build_string (1, "");
2736 c_parser_consume_token (parser
);
2740 c_parser_error (parser
, "expected string literal");
2746 /* Parse a simple asm expression. This is used in restricted
2747 contexts, where a full expression with inputs and outputs does not
2748 make sense. This is a GNU extension.
2751 asm ( asm-string-literal )
2755 c_parser_simple_asm_expr (c_parser
*parser
)
2758 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
2759 /* ??? Follow the C++ parser rather than using the
2760 c_lex_string_translate kludge. */
2761 c_lex_string_translate
= 0;
2762 c_parser_consume_token (parser
);
2763 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2765 c_lex_string_translate
= 1;
2768 str
= c_parser_asm_string_literal (parser
);
2769 c_lex_string_translate
= 1;
2770 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
2772 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2778 /* Parse (possibly empty) attributes. This is a GNU extension.
2782 attributes attribute
2785 __attribute__ ( ( attribute-list ) )
2789 attribute_list , attrib
2794 any-word ( identifier )
2795 any-word ( identifier , nonempty-expr-list )
2796 any-word ( expr-list )
2798 where the "identifier" must not be declared as a type, and
2799 "any-word" may be any identifier (including one declared as a
2800 type), a reserved word storage class specifier, type specifier or
2801 type qualifier. ??? This still leaves out most reserved keywords
2802 (following the old parser), shouldn't we include them, and why not
2803 allow identifiers declared as types to start the arguments? */
2806 c_parser_attributes (c_parser
*parser
)
2808 tree attrs
= NULL_TREE
;
2809 while (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2811 /* ??? Follow the C++ parser rather than using the
2812 c_lex_string_translate kludge. */
2813 c_lex_string_translate
= 0;
2814 c_parser_consume_token (parser
);
2815 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2817 c_lex_string_translate
= 1;
2820 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2822 c_lex_string_translate
= 1;
2823 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2826 /* Parse the attribute list. */
2827 while (c_parser_next_token_is (parser
, CPP_COMMA
)
2828 || c_parser_next_token_is (parser
, CPP_NAME
)
2829 || c_parser_next_token_is (parser
, CPP_KEYWORD
))
2831 tree attr
, attr_name
, attr_args
;
2832 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2834 c_parser_consume_token (parser
);
2837 if (c_parser_next_token_is (parser
, CPP_KEYWORD
))
2839 /* ??? See comment above about what keywords are
2842 switch (c_parser_peek_token (parser
)->keyword
)
2877 attr_name
= c_parser_peek_token (parser
)->value
;
2878 c_parser_consume_token (parser
);
2879 if (c_parser_next_token_is_not (parser
, CPP_OPEN_PAREN
))
2881 attr
= build_tree_list (attr_name
, NULL_TREE
);
2882 attrs
= chainon (attrs
, attr
);
2885 c_parser_consume_token (parser
);
2886 /* Parse the attribute contents. If they start with an
2887 identifier which is followed by a comma or close
2888 parenthesis, then the arguments start with that
2889 identifier; otherwise they are an expression list. */
2890 if (c_parser_next_token_is (parser
, CPP_NAME
)
2891 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
2892 && ((c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
)
2893 || (c_parser_peek_2nd_token (parser
)->type
2894 == CPP_CLOSE_PAREN
)))
2896 tree arg1
= c_parser_peek_token (parser
)->value
;
2897 c_parser_consume_token (parser
);
2898 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2899 attr_args
= build_tree_list (NULL_TREE
, arg1
);
2902 c_parser_consume_token (parser
);
2903 attr_args
= tree_cons (NULL_TREE
, arg1
,
2904 c_parser_expr_list (parser
, false));
2909 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2910 attr_args
= NULL_TREE
;
2912 attr_args
= c_parser_expr_list (parser
, false);
2914 attr
= build_tree_list (attr_name
, attr_args
);
2915 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2916 c_parser_consume_token (parser
);
2919 c_lex_string_translate
= 1;
2920 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2924 attrs
= chainon (attrs
, attr
);
2926 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2927 c_parser_consume_token (parser
);
2930 c_lex_string_translate
= 1;
2931 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2935 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2936 c_parser_consume_token (parser
);
2939 c_lex_string_translate
= 1;
2940 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2944 c_lex_string_translate
= 1;
2949 /* Parse a type name (C90 6.5.5, C99 6.7.6).
2952 specifier-qualifier-list abstract-declarator[opt]
2955 static struct c_type_name
*
2956 c_parser_type_name (c_parser
*parser
)
2958 struct c_declspecs
*specs
= build_null_declspecs ();
2959 struct c_declarator
*declarator
;
2960 struct c_type_name
*ret
;
2962 c_parser_declspecs (parser
, specs
, false, true, true);
2963 if (!specs
->declspecs_seen_p
)
2965 c_parser_error (parser
, "expected specifier-qualifier-list");
2968 pending_xref_error ();
2969 finish_declspecs (specs
);
2970 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2971 C_DTR_ABSTRACT
, &dummy
);
2972 if (declarator
== NULL
)
2974 ret
= XOBNEW (&parser_obstack
, struct c_type_name
);
2976 ret
->declarator
= declarator
;
2980 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
2983 assignment-expression
2984 { initializer-list }
2985 { initializer-list , }
2988 designation[opt] initializer
2989 initializer-list , designation[opt] initializer
2996 designator-list designator
3003 [ constant-expression ]
3015 [ constant-expression ... constant-expression ]
3017 Any expression without commas is accepted in the syntax for the
3018 constant-expressions, with non-constant expressions rejected later.
3020 This function is only used for top-level initializers; for nested
3021 ones, see c_parser_initval. */
3023 static struct c_expr
3024 c_parser_initializer (c_parser
*parser
)
3026 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
3027 return c_parser_braced_init (parser
, NULL_TREE
, false);
3031 ret
= c_parser_expr_no_commas (parser
, NULL
);
3032 if (TREE_CODE (ret
.value
) != STRING_CST
3033 && TREE_CODE (ret
.value
) != COMPOUND_LITERAL_EXPR
)
3034 ret
= default_function_array_conversion (ret
);
3039 /* Parse a braced initializer list. TYPE is the type specified for a
3040 compound literal, and NULL_TREE for other initializers and for
3041 nested braced lists. NESTED_P is true for nested braced lists,
3042 false for the list of a compound literal or the list that is the
3043 top-level initializer in a declaration. */
3045 static struct c_expr
3046 c_parser_braced_init (c_parser
*parser
, tree type
, bool nested_p
)
3048 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
3049 c_parser_consume_token (parser
);
3051 push_init_level (0);
3053 really_start_incremental_init (type
);
3054 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3057 pedwarn ("ISO C forbids empty initializer braces");
3061 /* Parse a non-empty initializer list, possibly with a trailing
3065 c_parser_initelt (parser
);
3068 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3069 c_parser_consume_token (parser
);
3072 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3076 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3079 ret
.value
= error_mark_node
;
3080 ret
.original_code
= ERROR_MARK
;
3081 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, "expected %<}%>");
3084 c_parser_consume_token (parser
);
3085 return pop_init_level (0);
3088 /* Parse a nested initializer, including designators. */
3091 c_parser_initelt (c_parser
*parser
)
3093 /* Parse any designator or designator list. A single array
3094 designator may have the subsequent "=" omitted in GNU C, but a
3095 longer list or a structure member designator may not. */
3096 if (c_parser_next_token_is (parser
, CPP_NAME
)
3097 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
3099 /* Old-style structure member designator. */
3100 set_init_label (c_parser_peek_token (parser
)->value
);
3102 pedwarn ("obsolete use of designated initializer with %<:%>");
3103 c_parser_consume_token (parser
);
3104 c_parser_consume_token (parser
);
3108 /* des_seen is 0 if there have been no designators, 1 if there
3109 has been a single array designator and 2 otherwise. */
3111 while (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
)
3112 || c_parser_next_token_is (parser
, CPP_DOT
))
3114 int des_prev
= des_seen
;
3117 if (c_parser_next_token_is (parser
, CPP_DOT
))
3120 c_parser_consume_token (parser
);
3121 if (c_parser_next_token_is (parser
, CPP_NAME
))
3123 set_init_label (c_parser_peek_token (parser
)->value
);
3124 c_parser_consume_token (parser
);
3129 init
.value
= error_mark_node
;
3130 init
.original_code
= ERROR_MARK
;
3131 c_parser_error (parser
, "expected identifier");
3132 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3133 process_init_element (init
);
3140 /* ??? Following the old parser, [ objc-receiver
3141 objc-message-args ] is accepted as an initializer,
3142 being distinguished from a designator by what follows
3143 the first assignment expression inside the square
3144 brackets, but after a first array designator a
3145 subsequent square bracket is for Objective-C taken to
3146 start an expression, using the obsolete form of
3147 designated initializer without '=', rather than
3148 possibly being a second level of designation: in LALR
3149 terms, the '[' is shifted rather than reducing
3150 designator to designator-list. */
3151 if (des_prev
== 1 && c_dialect_objc ())
3153 des_seen
= des_prev
;
3156 if (des_prev
== 0 && c_dialect_objc ())
3158 /* This might be an array designator or an
3159 Objective-C message expression. If the former,
3160 continue parsing here; if the latter, parse the
3161 remainder of the initializer given the starting
3162 primary-expression. ??? It might make sense to
3163 distinguish when des_prev == 1 as well; see
3164 previous comment. */
3166 struct c_expr mexpr
;
3167 c_parser_consume_token (parser
);
3168 if (c_parser_peek_token (parser
)->type
== CPP_NAME
3169 && ((c_parser_peek_token (parser
)->id_kind
3171 || (c_parser_peek_token (parser
)->id_kind
3172 == C_ID_CLASSNAME
)))
3174 /* Type name receiver. */
3175 tree id
= c_parser_peek_token (parser
)->value
;
3176 c_parser_consume_token (parser
);
3177 rec
= objc_get_class_reference (id
);
3178 goto parse_message_args
;
3180 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3181 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
)
3182 || c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3183 goto array_desig_after_first
;
3184 /* Expression receiver. So far only one part
3185 without commas has been parsed; there might be
3186 more of the expression. */
3188 while (c_parser_next_token_is (parser
, CPP_COMMA
))
3191 c_parser_consume_token (parser
);
3192 next
= c_parser_expr_no_commas (parser
, NULL
);
3193 next
= default_function_array_conversion (next
);
3194 rec
= build_compound_expr (rec
, next
.value
);
3197 /* Now parse the objc-message-args. */
3198 args
= c_parser_objc_message_args (parser
);
3199 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3202 = objc_build_message_expr (build_tree_list (rec
, args
));
3203 mexpr
.original_code
= ERROR_MARK
;
3204 /* Now parse and process the remainder of the
3205 initializer, starting with this message
3206 expression as a primary-expression. */
3207 c_parser_initval (parser
, &mexpr
);
3210 c_parser_consume_token (parser
);
3211 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3212 array_desig_after_first
:
3213 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3215 c_parser_consume_token (parser
);
3216 second
= c_parser_expr_no_commas (parser
, NULL
).value
;
3220 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3222 c_parser_consume_token (parser
);
3223 set_init_index (first
, second
);
3224 if (pedantic
&& second
)
3225 pedwarn ("ISO C forbids specifying range of "
3226 "elements to initialize");
3229 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3235 if (c_parser_next_token_is (parser
, CPP_EQ
))
3237 if (pedantic
&& !flag_isoc99
)
3238 pedwarn ("ISO C90 forbids specifying subobject to initialize");
3239 c_parser_consume_token (parser
);
3246 pedwarn ("obsolete use of designated initializer "
3252 init
.value
= error_mark_node
;
3253 init
.original_code
= ERROR_MARK
;
3254 c_parser_error (parser
, "expected %<=%>");
3255 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3256 process_init_element (init
);
3262 c_parser_initval (parser
, NULL
);
3265 /* Parse a nested initializer; as c_parser_initializer but parses
3266 initializers within braced lists, after any designators have been
3267 applied. If AFTER is not NULL then it is an Objective-C message
3268 expression which is the primary-expression starting the
3272 c_parser_initval (c_parser
*parser
, struct c_expr
*after
)
3275 gcc_assert (!after
|| c_dialect_objc ());
3276 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
) && !after
)
3277 init
= c_parser_braced_init (parser
, NULL_TREE
, true);
3280 init
= c_parser_expr_no_commas (parser
, after
);
3281 if (init
.value
!= NULL_TREE
3282 && TREE_CODE (init
.value
) != STRING_CST
3283 && TREE_CODE (init
.value
) != COMPOUND_LITERAL_EXPR
)
3284 init
= default_function_array_conversion (init
);
3286 process_init_element (init
);
3289 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3293 { block-item-list[opt] }
3294 { label-declarations block-item-list }
3298 block-item-list block-item
3310 { label-declarations block-item-list }
3313 __extension__ nested-declaration
3314 nested-function-definition
3318 label-declarations label-declaration
3321 __label__ identifier-list ;
3323 Allowing the mixing of declarations and code is new in C99. The
3324 GNU syntax also permits (not shown above) labels at the end of
3325 compound statements, which yield an error. We don't allow labels
3326 on declarations; this might seem like a natural extension, but
3327 there would be a conflict between attributes on the label and
3328 prefix attributes on the declaration. ??? The syntax follows the
3329 old parser in requiring something after label declarations.
3330 Although they are erroneous if the labels declared aren't defined,
3331 is it useful for the syntax to be this way?
3343 c_parser_compound_statement (c_parser
*parser
)
3346 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
3347 return error_mark_node
;
3348 stmt
= c_begin_compound_stmt (true);
3349 c_parser_compound_statement_nostart (parser
);
3350 return c_end_compound_stmt (stmt
, true);
3353 /* Parse a compound statement except for the opening brace. This is
3354 used for parsing both compound statements and statement expressions
3355 (which follow different paths to handling the opening). */
3358 c_parser_compound_statement_nostart (c_parser
*parser
)
3360 bool last_stmt
= false;
3361 bool last_label
= false;
3362 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3364 c_parser_consume_token (parser
);
3367 if (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3369 /* Read zero or more forward-declarations for labels that nested
3370 functions can jump to. */
3371 while (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3373 c_parser_consume_token (parser
);
3374 /* Any identifiers, including those declared as type names,
3379 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
3381 c_parser_error (parser
, "expected identifier");
3385 = declare_label (c_parser_peek_token (parser
)->value
);
3386 C_DECLARED_LABEL_FLAG (label
) = 1;
3387 add_stmt (build_stmt (DECL_EXPR
, label
));
3388 c_parser_consume_token (parser
);
3389 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3390 c_parser_consume_token (parser
);
3394 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3396 /* ??? Locating this diagnostic on the token after the
3397 declarations end follows the old parser, but it might be
3398 better to locate it where the declarations start instead. */
3400 pedwarn ("ISO C forbids label declarations");
3402 /* We must now have at least one statement, label or declaration. */
3403 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3405 c_parser_error (parser
, "expected declaration or statement");
3406 c_parser_consume_token (parser
);
3409 while (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3411 location_t loc
= c_parser_peek_token (parser
)->location
;
3412 if (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3413 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3414 || (c_parser_next_token_is (parser
, CPP_NAME
)
3415 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3419 c_parser_label (parser
);
3421 else if (!last_label
3422 && c_parser_next_token_starts_declspecs (parser
))
3425 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3427 && ((pedantic
&& !flag_isoc99
)
3428 || warn_declaration_after_statement
))
3429 pedwarn_c90 ("%HISO C90 forbids mixed declarations and code",
3433 else if (!last_label
3434 && c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
3436 /* __extension__ can start a declaration, but is also an
3437 unary operator that can start an expression. Consume all
3438 but the last of a possible series of __extension__ to
3440 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
3441 && (c_parser_peek_2nd_token (parser
)->keyword
3443 c_parser_consume_token (parser
);
3444 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
3447 ext
= disable_extension_diagnostics ();
3448 c_parser_consume_token (parser
);
3450 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3451 /* Following the old parser, __extension__ does not
3452 disable this diagnostic. */
3453 restore_extension_diagnostics (ext
);
3455 && ((pedantic
&& !flag_isoc99
)
3456 || warn_declaration_after_statement
))
3457 pedwarn_c90 ("%HISO C90 forbids mixed declarations and code",
3464 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
3466 /* External pragmas, and some omp pragmas, are not associated
3467 with regular c code, and so are not to be considered statements
3468 syntactically. This ensures that the user doesn't put them
3469 places that would turn into syntax errors if the directive
3471 if (c_parser_pragma (parser
, pragma_compound
))
3472 last_label
= false, last_stmt
= true;
3474 else if (c_parser_next_token_is (parser
, CPP_EOF
))
3476 c_parser_error (parser
, "expected declaration or statement");
3484 c_parser_statement_after_labels (parser
);
3488 error ("label at end of compound statement");
3489 c_parser_consume_token (parser
);
3492 /* Parse a label (C90 6.6.1, C99 6.8.1).
3495 identifier : attributes[opt]
3496 case constant-expression :
3502 case constant-expression ... constant-expression :
3504 The use of attributes on labels is a GNU extension. The syntax in
3505 GNU C accepts any expressions without commas, non-constant
3506 expressions being rejected later. */
3509 c_parser_label (c_parser
*parser
)
3511 location_t loc1
= c_parser_peek_token (parser
)->location
;
3512 tree label
= NULL_TREE
;
3513 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
3516 c_parser_consume_token (parser
);
3517 exp1
= c_parser_expr_no_commas (parser
, NULL
).value
;
3518 if (c_parser_next_token_is (parser
, CPP_COLON
))
3520 c_parser_consume_token (parser
);
3521 label
= do_case (exp1
, NULL_TREE
);
3523 else if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3525 c_parser_consume_token (parser
);
3526 exp2
= c_parser_expr_no_commas (parser
, NULL
).value
;
3527 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3528 label
= do_case (exp1
, exp2
);
3531 c_parser_error (parser
, "expected %<:%> or %<...%>");
3533 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
3535 c_parser_consume_token (parser
);
3536 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3537 label
= do_case (NULL_TREE
, NULL_TREE
);
3541 tree name
= c_parser_peek_token (parser
)->value
;
3545 gcc_assert (c_parser_next_token_is (parser
, CPP_NAME
));
3546 c_parser_consume_token (parser
);
3547 gcc_assert (c_parser_next_token_is (parser
, CPP_COLON
));
3548 loc2
= c_parser_peek_token (parser
)->location
;
3549 c_parser_consume_token (parser
);
3550 attrs
= c_parser_attributes (parser
);
3551 tlab
= define_label (loc2
, name
);
3554 decl_attributes (&tlab
, attrs
, 0);
3555 label
= add_stmt (build_stmt (LABEL_EXPR
, tlab
));
3559 SET_EXPR_LOCATION (label
, loc1
);
3562 /* Parse a statement (C90 6.6, C99 6.8).
3567 expression-statement
3575 expression-statement:
3578 selection-statement:
3582 iteration-statement:
3591 return expression[opt] ;
3604 objc-throw-statement
3605 objc-try-catch-statement
3606 objc-synchronized-statement
3608 objc-throw-statement:
3622 parallel-for-construct
3623 parallel-sections-construct
3630 parallel-directive structured-block
3633 for-directive iteration-statement
3636 sections-directive section-scope
3639 single-directive structured-block
3641 parallel-for-construct:
3642 parallel-for-directive iteration-statement
3644 parallel-sections-construct:
3645 parallel-sections-directive section-scope
3648 master-directive structured-block
3651 critical-directive structured-block
3654 atomic-directive expression-statement
3657 ordered-directive structured-block */
3660 c_parser_statement (c_parser
*parser
)
3662 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3663 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3664 || (c_parser_next_token_is (parser
, CPP_NAME
)
3665 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3666 c_parser_label (parser
);
3667 c_parser_statement_after_labels (parser
);
3670 /* Parse a statement, other than a labeled statement. */
3673 c_parser_statement_after_labels (c_parser
*parser
)
3675 location_t loc
= c_parser_peek_token (parser
)->location
;
3676 tree stmt
= NULL_TREE
;
3677 switch (c_parser_peek_token (parser
)->type
)
3679 case CPP_OPEN_BRACE
:
3680 add_stmt (c_parser_compound_statement (parser
));
3683 switch (c_parser_peek_token (parser
)->keyword
)
3686 c_parser_if_statement (parser
);
3689 c_parser_switch_statement (parser
);
3692 c_parser_while_statement (parser
);
3695 c_parser_do_statement (parser
);
3698 c_parser_for_statement (parser
);
3701 c_parser_consume_token (parser
);
3702 if (c_parser_next_token_is (parser
, CPP_NAME
))
3704 stmt
= c_finish_goto_label (c_parser_peek_token (parser
)->value
);
3705 c_parser_consume_token (parser
);
3707 else if (c_parser_next_token_is (parser
, CPP_MULT
))
3709 c_parser_consume_token (parser
);
3710 stmt
= c_finish_goto_ptr (c_parser_expression (parser
).value
);
3713 c_parser_error (parser
, "expected identifier or %<*%>");
3714 goto expect_semicolon
;
3716 c_parser_consume_token (parser
);
3717 stmt
= c_finish_bc_stmt (&c_cont_label
, false);
3718 goto expect_semicolon
;
3720 c_parser_consume_token (parser
);
3721 stmt
= c_finish_bc_stmt (&c_break_label
, true);
3722 goto expect_semicolon
;
3724 c_parser_consume_token (parser
);
3725 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3727 stmt
= c_finish_return (NULL_TREE
);
3728 c_parser_consume_token (parser
);
3732 stmt
= c_finish_return (c_parser_expression_conv (parser
).value
);
3733 goto expect_semicolon
;
3737 stmt
= c_parser_asm_statement (parser
);
3740 gcc_assert (c_dialect_objc ());
3741 c_parser_consume_token (parser
);
3742 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3744 stmt
= objc_build_throw_stmt (NULL_TREE
);
3745 c_parser_consume_token (parser
);
3750 = objc_build_throw_stmt (c_parser_expression (parser
).value
);
3751 goto expect_semicolon
;
3755 gcc_assert (c_dialect_objc ());
3756 c_parser_objc_try_catch_statement (parser
);
3758 case RID_AT_SYNCHRONIZED
:
3759 gcc_assert (c_dialect_objc ());
3760 c_parser_objc_synchronized_statement (parser
);
3767 c_parser_consume_token (parser
);
3769 case CPP_CLOSE_PAREN
:
3770 case CPP_CLOSE_SQUARE
:
3771 /* Avoid infinite loop in error recovery:
3772 c_parser_skip_until_found stops at a closing nesting
3773 delimiter without consuming it, but here we need to consume
3774 it to proceed further. */
3775 c_parser_error (parser
, "expected statement");
3776 c_parser_consume_token (parser
);
3779 c_parser_pragma (parser
, pragma_stmt
);
3783 stmt
= c_finish_expr_stmt (c_parser_expression_conv (parser
).value
);
3785 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3788 /* Two cases cannot and do not have line numbers associated: If stmt
3789 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3790 cannot hold line numbers. But that's OK because the statement
3791 will either be changed to a MODIFY_EXPR during gimplification of
3792 the statement expr, or discarded. If stmt was compound, but
3793 without new variables, we will have skipped the creation of a
3794 BIND and will have a bare STATEMENT_LIST. But that's OK because
3795 (recursively) all of the component statements should already have
3796 line numbers assigned. ??? Can we discard no-op statements
3798 if (stmt
&& EXPR_P (stmt
))
3799 SET_EXPR_LOCATION (stmt
, loc
);
3802 /* Parse a parenthesized condition from an if, do or while statement.
3808 c_parser_paren_condition (c_parser
*parser
)
3812 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3813 return error_mark_node
;
3814 loc
= c_parser_peek_token (parser
)->location
;
3815 cond
= c_objc_common_truthvalue_conversion
3816 (c_parser_expression_conv (parser
).value
);
3818 SET_EXPR_LOCATION (cond
, loc
);
3819 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3823 /* Parse a statement which is a block in C99. */
3826 c_parser_c99_block_statement (c_parser
*parser
)
3828 tree block
= c_begin_compound_stmt (flag_isoc99
);
3829 c_parser_statement (parser
);
3830 return c_end_compound_stmt (block
, flag_isoc99
);
3833 /* Parse the body of an if statement or the else half thereof. This
3834 is just parsing a statement but (a) it is a block in C99, (b) we
3835 track whether the body is an if statement for the sake of
3836 -Wparentheses warnings, (c) we handle an empty body specially for
3837 the sake of -Wextra warnings. */
3840 c_parser_if_body (c_parser
*parser
, bool *if_p
)
3842 tree block
= c_begin_compound_stmt (flag_isoc99
);
3843 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3844 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3845 || (c_parser_next_token_is (parser
, CPP_NAME
)
3846 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3847 c_parser_label (parser
);
3848 *if_p
= c_parser_next_token_is_keyword (parser
, RID_IF
);
3849 if (extra_warnings
&& c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3850 add_stmt (build_empty_stmt ());
3851 c_parser_statement_after_labels (parser
);
3852 return c_end_compound_stmt (block
, flag_isoc99
);
3855 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3858 if ( expression ) statement
3859 if ( expression ) statement else statement
3863 c_parser_if_statement (c_parser
*parser
)
3868 bool first_if
= false, second_if
= false;
3869 tree first_body
, second_body
;
3870 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_IF
));
3871 c_parser_consume_token (parser
);
3872 block
= c_begin_compound_stmt (flag_isoc99
);
3873 loc
= c_parser_peek_token (parser
)->location
;
3874 cond
= c_parser_paren_condition (parser
);
3875 first_body
= c_parser_if_body (parser
, &first_if
);
3876 if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3878 c_parser_consume_token (parser
);
3879 second_body
= c_parser_if_body (parser
, &second_if
);
3882 second_body
= NULL_TREE
;
3883 c_finish_if_stmt (loc
, cond
, first_body
, second_body
, first_if
);
3884 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3887 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3890 switch (expression) statement
3894 c_parser_switch_statement (c_parser
*parser
)
3896 tree block
, expr
, body
, save_break
;
3897 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SWITCH
));
3898 c_parser_consume_token (parser
);
3899 block
= c_begin_compound_stmt (flag_isoc99
);
3900 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3902 expr
= c_parser_expression (parser
).value
;
3903 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3906 expr
= error_mark_node
;
3907 c_start_case (expr
);
3908 save_break
= c_break_label
;
3909 c_break_label
= NULL_TREE
;
3910 body
= c_parser_c99_block_statement (parser
);
3911 c_finish_case (body
);
3913 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_break_label
));
3914 c_break_label
= save_break
;
3915 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3918 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
3921 while (expression) statement
3925 c_parser_while_statement (c_parser
*parser
)
3927 tree block
, cond
, body
, save_break
, save_cont
;
3929 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_WHILE
));
3930 c_parser_consume_token (parser
);
3931 block
= c_begin_compound_stmt (flag_isoc99
);
3932 loc
= c_parser_peek_token (parser
)->location
;
3933 cond
= c_parser_paren_condition (parser
);
3934 save_break
= c_break_label
;
3935 c_break_label
= NULL_TREE
;
3936 save_cont
= c_cont_label
;
3937 c_cont_label
= NULL_TREE
;
3938 body
= c_parser_c99_block_statement (parser
);
3939 c_finish_loop (loc
, cond
, NULL
, body
, c_break_label
, c_cont_label
, true);
3940 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3941 c_break_label
= save_break
;
3942 c_cont_label
= save_cont
;
3945 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
3948 do statement while ( expression ) ;
3952 c_parser_do_statement (c_parser
*parser
)
3954 tree block
, cond
, body
, save_break
, save_cont
, new_break
, new_cont
;
3956 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_DO
));
3957 c_parser_consume_token (parser
);
3958 block
= c_begin_compound_stmt (flag_isoc99
);
3959 loc
= c_parser_peek_token (parser
)->location
;
3960 save_break
= c_break_label
;
3961 c_break_label
= NULL_TREE
;
3962 save_cont
= c_cont_label
;
3963 c_cont_label
= NULL_TREE
;
3964 body
= c_parser_c99_block_statement (parser
);
3965 c_parser_require_keyword (parser
, RID_WHILE
, "expected %<while%>");
3966 new_break
= c_break_label
;
3967 c_break_label
= save_break
;
3968 new_cont
= c_cont_label
;
3969 c_cont_label
= save_cont
;
3970 cond
= c_parser_paren_condition (parser
);
3971 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
3972 c_parser_skip_to_end_of_block_or_statement (parser
);
3973 c_finish_loop (loc
, cond
, NULL
, body
, new_break
, new_cont
, false);
3974 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3977 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
3980 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
3981 for ( nested-declaration expression[opt] ; expression[opt] ) statement
3983 The form with a declaration is new in C99.
3985 ??? In accordance with the old parser, the declaration may be a
3986 nested function, which is then rejected in check_for_loop_decls,
3987 but does it make any sense for this to be included in the grammar?
3988 Note in particular that the nested function does not include a
3989 trailing ';', whereas the "declaration" production includes one.
3990 Also, can we reject bad declarations earlier and cheaper than
3991 check_for_loop_decls? */
3994 c_parser_for_statement (c_parser
*parser
)
3996 tree block
, cond
, incr
, save_break
, save_cont
, body
;
3998 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_FOR
));
3999 loc
= c_parser_peek_token (parser
)->location
;
4000 c_parser_consume_token (parser
);
4001 block
= c_begin_compound_stmt (flag_isoc99
);
4002 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4004 /* Parse the initialization declaration or expression. */
4005 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4007 c_parser_consume_token (parser
);
4008 c_finish_expr_stmt (NULL_TREE
);
4010 else if (c_parser_next_token_starts_declspecs (parser
))
4012 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4013 check_for_loop_decls ();
4015 else if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4017 /* __extension__ can start a declaration, but is also an
4018 unary operator that can start an expression. Consume all
4019 but the last of a possible series of __extension__ to
4021 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4022 && (c_parser_peek_2nd_token (parser
)->keyword
4024 c_parser_consume_token (parser
);
4025 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
4028 ext
= disable_extension_diagnostics ();
4029 c_parser_consume_token (parser
);
4030 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4031 restore_extension_diagnostics (ext
);
4032 check_for_loop_decls ();
4040 c_finish_expr_stmt (c_parser_expression (parser
).value
);
4041 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4043 /* Parse the loop condition. */
4044 loc
= c_parser_peek_token (parser
)->location
;
4045 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4047 c_parser_consume_token (parser
);
4052 tree ocond
= c_parser_expression_conv (parser
).value
;
4053 cond
= c_objc_common_truthvalue_conversion (ocond
);
4055 SET_EXPR_LOCATION (cond
, loc
);
4056 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4058 /* Parse the increment expression. */
4059 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4060 incr
= c_process_expr_stmt (NULL_TREE
);
4062 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
4063 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4067 cond
= error_mark_node
;
4068 incr
= error_mark_node
;
4070 save_break
= c_break_label
;
4071 c_break_label
= NULL_TREE
;
4072 save_cont
= c_cont_label
;
4073 c_cont_label
= NULL_TREE
;
4074 body
= c_parser_c99_block_statement (parser
);
4075 c_finish_loop (loc
, cond
, incr
, body
, c_break_label
, c_cont_label
, true);
4076 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4077 c_break_label
= save_break
;
4078 c_cont_label
= save_cont
;
4081 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4082 statement with inputs, outputs, clobbers, and volatile tag
4086 asm type-qualifier[opt] ( asm-argument ) ;
4090 asm-string-literal : asm-operands[opt]
4091 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4092 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4094 Qualifiers other than volatile are accepted in the syntax but
4098 c_parser_asm_statement (c_parser
*parser
)
4100 tree quals
, str
, outputs
, inputs
, clobbers
, ret
;
4102 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
4103 c_parser_consume_token (parser
);
4104 if (c_parser_next_token_is_keyword (parser
, RID_VOLATILE
))
4106 quals
= c_parser_peek_token (parser
)->value
;
4107 c_parser_consume_token (parser
);
4109 else if (c_parser_next_token_is_keyword (parser
, RID_CONST
)
4110 || c_parser_next_token_is_keyword (parser
, RID_RESTRICT
))
4112 warning (0, "%E qualifier ignored on asm",
4113 c_parser_peek_token (parser
)->value
);
4115 c_parser_consume_token (parser
);
4119 /* ??? Follow the C++ parser rather than using the
4120 c_lex_string_translate kludge. */
4121 c_lex_string_translate
= 0;
4122 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4124 c_lex_string_translate
= 1;
4127 str
= c_parser_asm_string_literal (parser
);
4128 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4131 outputs
= NULL_TREE
;
4133 clobbers
= NULL_TREE
;
4136 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4138 c_lex_string_translate
= 1;
4139 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4143 /* Parse outputs. */
4144 if (c_parser_next_token_is (parser
, CPP_COLON
)
4145 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4146 outputs
= NULL_TREE
;
4148 outputs
= c_parser_asm_operands (parser
, false);
4149 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4152 clobbers
= NULL_TREE
;
4155 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4157 c_lex_string_translate
= 1;
4158 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4162 if (c_parser_next_token_is (parser
, CPP_COLON
)
4163 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4166 inputs
= c_parser_asm_operands (parser
, true);
4167 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
);
4178 /* Parse clobbers. */
4179 clobbers
= c_parser_asm_clobbers (parser
);
4181 c_lex_string_translate
= 1;
4182 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4184 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4187 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4188 c_parser_skip_to_end_of_block_or_statement (parser
);
4189 ret
= build_asm_stmt (quals
, build_asm_expr (str
, outputs
, inputs
,
4194 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4195 not outputs), apply the default conversion of functions and arrays
4200 asm-operands , asm-operand
4203 asm-string-literal ( expression )
4204 [ identifier ] asm-string-literal ( expression )
4208 c_parser_asm_operands (c_parser
*parser
, bool convert_p
)
4210 tree list
= NULL_TREE
;
4215 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
4217 c_parser_consume_token (parser
);
4218 if (c_parser_next_token_is (parser
, CPP_NAME
))
4220 tree id
= c_parser_peek_token (parser
)->value
;
4221 c_parser_consume_token (parser
);
4222 name
= build_string (IDENTIFIER_LENGTH (id
),
4223 IDENTIFIER_POINTER (id
));
4227 c_parser_error (parser
, "expected identifier");
4228 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, NULL
);
4231 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
4236 str
= c_parser_asm_string_literal (parser
);
4237 if (str
== NULL_TREE
)
4239 c_lex_string_translate
= 1;
4240 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4242 c_lex_string_translate
= 0;
4245 expr
= c_parser_expression (parser
);
4247 expr
= default_function_array_conversion (expr
);
4248 c_lex_string_translate
= 0;
4249 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4251 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4254 list
= chainon (list
, build_tree_list (build_tree_list (name
, str
),
4256 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4257 c_parser_consume_token (parser
);
4264 /* Parse asm clobbers, a GNU extension.
4268 asm-clobbers , asm-string-literal
4272 c_parser_asm_clobbers (c_parser
*parser
)
4274 tree list
= NULL_TREE
;
4277 tree str
= c_parser_asm_string_literal (parser
);
4279 list
= tree_cons (NULL_TREE
, str
, list
);
4282 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4283 c_parser_consume_token (parser
);
4290 /* Parse an expression other than a compound expression; that is, an
4291 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4292 NULL then it is an Objective-C message expression which is the
4293 primary-expression starting the expression as an initializer.
4295 assignment-expression:
4296 conditional-expression
4297 unary-expression assignment-operator assignment-expression
4299 assignment-operator: one of
4300 = *= /= %= += -= <<= >>= &= ^= |=
4302 In GNU C we accept any conditional expression on the LHS and
4303 diagnose the invalid lvalue rather than producing a syntax
4306 static struct c_expr
4307 c_parser_expr_no_commas (c_parser
*parser
, struct c_expr
*after
)
4309 struct c_expr lhs
, rhs
, ret
;
4310 enum tree_code code
;
4311 gcc_assert (!after
|| c_dialect_objc ());
4312 lhs
= c_parser_conditional_expression (parser
, after
);
4313 switch (c_parser_peek_token (parser
)->type
)
4322 code
= TRUNC_DIV_EXPR
;
4325 code
= TRUNC_MOD_EXPR
;
4340 code
= BIT_AND_EXPR
;
4343 code
= BIT_XOR_EXPR
;
4346 code
= BIT_IOR_EXPR
;
4351 c_parser_consume_token (parser
);
4352 rhs
= c_parser_expr_no_commas (parser
, NULL
);
4353 rhs
= default_function_array_conversion (rhs
);
4354 ret
.value
= build_modify_expr (lhs
.value
, code
, rhs
.value
);
4355 if (code
== NOP_EXPR
)
4356 ret
.original_code
= MODIFY_EXPR
;
4359 TREE_NO_WARNING (ret
.value
) = 1;
4360 ret
.original_code
= ERROR_MARK
;
4365 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4366 is not NULL then it is an Objective-C message expression which is
4367 the primary-expression starting the expression as an initializer.
4369 conditional-expression:
4370 logical-OR-expression
4371 logical-OR-expression ? expression : conditional-expression
4375 conditional-expression:
4376 logical-OR-expression ? : conditional-expression
4379 static struct c_expr
4380 c_parser_conditional_expression (c_parser
*parser
, struct c_expr
*after
)
4382 struct c_expr cond
, exp1
, exp2
, ret
;
4383 gcc_assert (!after
|| c_dialect_objc ());
4384 cond
= c_parser_binary_expression (parser
, after
);
4385 if (c_parser_next_token_is_not (parser
, CPP_QUERY
))
4387 cond
= default_function_array_conversion (cond
);
4388 c_parser_consume_token (parser
);
4389 if (c_parser_next_token_is (parser
, CPP_COLON
))
4392 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
4393 /* Make sure first operand is calculated only once. */
4394 exp1
.value
= save_expr (default_conversion (cond
.value
));
4395 cond
.value
= c_objc_common_truthvalue_conversion (exp1
.value
);
4396 skip_evaluation
+= cond
.value
== truthvalue_true_node
;
4401 = c_objc_common_truthvalue_conversion
4402 (default_conversion (cond
.value
));
4403 skip_evaluation
+= cond
.value
== truthvalue_false_node
;
4404 exp1
= c_parser_expression_conv (parser
);
4405 skip_evaluation
+= ((cond
.value
== truthvalue_true_node
)
4406 - (cond
.value
== truthvalue_false_node
));
4408 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4410 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4411 ret
.value
= error_mark_node
;
4412 ret
.original_code
= ERROR_MARK
;
4415 exp2
= c_parser_conditional_expression (parser
, NULL
);
4416 exp2
= default_function_array_conversion (exp2
);
4417 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4418 ret
.value
= build_conditional_expr (cond
.value
, exp1
.value
, exp2
.value
);
4419 ret
.original_code
= ERROR_MARK
;
4423 /* Parse a binary expression; that is, a logical-OR-expression (C90
4424 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4425 an Objective-C message expression which is the primary-expression
4426 starting the expression as an initializer.
4428 multiplicative-expression:
4430 multiplicative-expression * cast-expression
4431 multiplicative-expression / cast-expression
4432 multiplicative-expression % cast-expression
4434 additive-expression:
4435 multiplicative-expression
4436 additive-expression + multiplicative-expression
4437 additive-expression - multiplicative-expression
4441 shift-expression << additive-expression
4442 shift-expression >> additive-expression
4444 relational-expression:
4446 relational-expression < shift-expression
4447 relational-expression > shift-expression
4448 relational-expression <= shift-expression
4449 relational-expression >= shift-expression
4451 equality-expression:
4452 relational-expression
4453 equality-expression == relational-expression
4454 equality-expression != relational-expression
4458 AND-expression & equality-expression
4460 exclusive-OR-expression:
4462 exclusive-OR-expression ^ AND-expression
4464 inclusive-OR-expression:
4465 exclusive-OR-expression
4466 inclusive-OR-expression | exclusive-OR-expression
4468 logical-AND-expression:
4469 inclusive-OR-expression
4470 logical-AND-expression && inclusive-OR-expression
4472 logical-OR-expression:
4473 logical-AND-expression
4474 logical-OR-expression || logical-AND-expression
4477 static struct c_expr
4478 c_parser_binary_expression (c_parser
*parser
, struct c_expr
*after
)
4480 /* A binary expression is parsed using operator-precedence parsing,
4481 with the operands being cast expressions. All the binary
4482 operators are left-associative. Thus a binary expression is of
4485 E0 op1 E1 op2 E2 ...
4487 which we represent on a stack. On the stack, the precedence
4488 levels are strictly increasing. When a new operator is
4489 encountered of higher precedence than that at the top of the
4490 stack, it is pushed; its LHS is the top expression, and its RHS
4491 is everything parsed until it is popped. When a new operator is
4492 encountered with precedence less than or equal to that at the top
4493 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4494 by the result of the operation until the operator at the top of
4495 the stack has lower precedence than the new operator or there is
4496 only one element on the stack; then the top expression is the LHS
4497 of the new operator. In the case of logical AND and OR
4498 expressions, we also need to adjust skip_evaluation as
4499 appropriate when the operators are pushed and popped. */
4501 /* The precedence levels, where 0 is a dummy lowest level used for
4502 the bottom of the stack. */
4518 /* The expression at this stack level. */
4520 /* The precedence of the operator on its left, PREC_NONE at the
4521 bottom of the stack. */
4523 /* The operation on its left. */
4529 switch (stack[sp].op) \
4531 case TRUTH_ANDIF_EXPR: \
4532 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4534 case TRUTH_ORIF_EXPR: \
4535 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4540 stack[sp - 1].expr \
4541 = default_function_array_conversion (stack[sp - 1].expr); \
4543 = default_function_array_conversion (stack[sp].expr); \
4544 stack[sp - 1].expr = parser_build_binary_op (stack[sp].op, \
4545 stack[sp - 1].expr, \
4549 gcc_assert (!after
|| c_dialect_objc ());
4550 stack
[0].expr
= c_parser_cast_expression (parser
, after
);
4551 stack
[0].prec
= PREC_NONE
;
4556 enum tree_code ocode
;
4559 switch (c_parser_peek_token (parser
)->type
)
4567 ocode
= TRUNC_DIV_EXPR
;
4571 ocode
= TRUNC_MOD_EXPR
;
4583 ocode
= LSHIFT_EXPR
;
4587 ocode
= RSHIFT_EXPR
;
4601 case CPP_GREATER_EQ
:
4614 oprec
= PREC_BITAND
;
4615 ocode
= BIT_AND_EXPR
;
4618 oprec
= PREC_BITXOR
;
4619 ocode
= BIT_XOR_EXPR
;
4623 ocode
= BIT_IOR_EXPR
;
4626 oprec
= PREC_LOGAND
;
4627 ocode
= TRUTH_ANDIF_EXPR
;
4631 ocode
= TRUTH_ORIF_EXPR
;
4634 /* Not a binary operator, so end of the binary
4638 c_parser_consume_token (parser
);
4639 while (oprec
<= stack
[sp
].prec
)
4643 case TRUTH_ANDIF_EXPR
:
4645 = default_function_array_conversion (stack
[sp
].expr
);
4646 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4647 (default_conversion (stack
[sp
].expr
.value
));
4648 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_false_node
;
4650 case TRUTH_ORIF_EXPR
:
4652 = default_function_array_conversion (stack
[sp
].expr
);
4653 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4654 (default_conversion (stack
[sp
].expr
.value
));
4655 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_true_node
;
4661 stack
[sp
].expr
= c_parser_cast_expression (parser
, NULL
);
4662 stack
[sp
].prec
= oprec
;
4663 stack
[sp
].op
= ocode
;
4668 return stack
[0].expr
;
4672 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4673 NULL then it is an Objective-C message expression which is the
4674 primary-expression starting the expression as an initializer.
4678 ( type-name ) unary-expression
4681 static struct c_expr
4682 c_parser_cast_expression (c_parser
*parser
, struct c_expr
*after
)
4684 gcc_assert (!after
|| c_dialect_objc ());
4686 return c_parser_postfix_expression_after_primary (parser
, *after
);
4687 /* If the expression begins with a parenthesized type name, it may
4688 be either a cast or a compound literal; we need to see whether
4689 the next character is '{' to tell the difference. If not, it is
4690 an unary expression. */
4691 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4692 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4694 struct c_type_name
*type_name
;
4697 c_parser_consume_token (parser
);
4698 type_name
= c_parser_type_name (parser
);
4699 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4700 if (type_name
== NULL
)
4702 ret
.value
= error_mark_node
;
4703 ret
.original_code
= ERROR_MARK
;
4707 /* Save casted types in the function's used types hash table. */
4708 used_types_insert (type_name
->specs
->type
);
4710 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4711 return c_parser_postfix_expression_after_paren_type (parser
,
4713 expr
= c_parser_cast_expression (parser
, NULL
);
4714 expr
= default_function_array_conversion (expr
);
4715 ret
.value
= c_cast_expr (type_name
, expr
.value
);
4716 ret
.original_code
= ERROR_MARK
;
4720 return c_parser_unary_expression (parser
);
4723 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4729 unary-operator cast-expression
4730 sizeof unary-expression
4731 sizeof ( type-name )
4733 unary-operator: one of
4739 __alignof__ unary-expression
4740 __alignof__ ( type-name )
4743 unary-operator: one of
4744 __extension__ __real__ __imag__
4746 In addition, the GNU syntax treats ++ and -- as unary operators, so
4747 they may be applied to cast expressions with errors for non-lvalues
4750 static struct c_expr
4751 c_parser_unary_expression (c_parser
*parser
)
4754 struct c_expr ret
, op
;
4755 switch (c_parser_peek_token (parser
)->type
)
4758 c_parser_consume_token (parser
);
4759 op
= c_parser_cast_expression (parser
, NULL
);
4760 op
= default_function_array_conversion (op
);
4761 return parser_build_unary_op (PREINCREMENT_EXPR
, op
);
4762 case CPP_MINUS_MINUS
:
4763 c_parser_consume_token (parser
);
4764 op
= c_parser_cast_expression (parser
, NULL
);
4765 op
= default_function_array_conversion (op
);
4766 return parser_build_unary_op (PREDECREMENT_EXPR
, op
);
4768 c_parser_consume_token (parser
);
4769 return parser_build_unary_op (ADDR_EXPR
,
4770 c_parser_cast_expression (parser
, NULL
));
4772 c_parser_consume_token (parser
);
4773 op
= c_parser_cast_expression (parser
, NULL
);
4774 op
= default_function_array_conversion (op
);
4775 ret
.value
= build_indirect_ref (op
.value
, "unary *");
4776 ret
.original_code
= ERROR_MARK
;
4779 c_parser_consume_token (parser
);
4780 if (!c_dialect_objc () && !in_system_header
)
4781 warning (OPT_Wtraditional
,
4782 "traditional C rejects the unary plus operator");
4783 op
= c_parser_cast_expression (parser
, NULL
);
4784 op
= default_function_array_conversion (op
);
4785 return parser_build_unary_op (CONVERT_EXPR
, op
);
4787 c_parser_consume_token (parser
);
4788 op
= c_parser_cast_expression (parser
, NULL
);
4789 op
= default_function_array_conversion (op
);
4790 return parser_build_unary_op (NEGATE_EXPR
, op
);
4792 c_parser_consume_token (parser
);
4793 op
= c_parser_cast_expression (parser
, NULL
);
4794 op
= default_function_array_conversion (op
);
4795 return parser_build_unary_op (BIT_NOT_EXPR
, op
);
4797 c_parser_consume_token (parser
);
4798 op
= c_parser_cast_expression (parser
, NULL
);
4799 op
= default_function_array_conversion (op
);
4800 return parser_build_unary_op (TRUTH_NOT_EXPR
, op
);
4802 /* Refer to the address of a label as a pointer. */
4803 c_parser_consume_token (parser
);
4804 if (c_parser_next_token_is (parser
, CPP_NAME
))
4806 ret
.value
= finish_label_address_expr
4807 (c_parser_peek_token (parser
)->value
);
4808 c_parser_consume_token (parser
);
4812 c_parser_error (parser
, "expected identifier");
4813 ret
.value
= error_mark_node
;
4815 ret
.original_code
= ERROR_MARK
;
4818 switch (c_parser_peek_token (parser
)->keyword
)
4821 return c_parser_sizeof_expression (parser
);
4823 return c_parser_alignof_expression (parser
);
4825 c_parser_consume_token (parser
);
4826 ext
= disable_extension_diagnostics ();
4827 ret
= c_parser_cast_expression (parser
, NULL
);
4828 restore_extension_diagnostics (ext
);
4831 c_parser_consume_token (parser
);
4832 op
= c_parser_cast_expression (parser
, NULL
);
4833 op
= default_function_array_conversion (op
);
4834 return parser_build_unary_op (REALPART_EXPR
, op
);
4836 c_parser_consume_token (parser
);
4837 op
= c_parser_cast_expression (parser
, NULL
);
4838 op
= default_function_array_conversion (op
);
4839 return parser_build_unary_op (IMAGPART_EXPR
, op
);
4841 return c_parser_postfix_expression (parser
);
4844 return c_parser_postfix_expression (parser
);
4848 /* Parse a sizeof expression. */
4850 static struct c_expr
4851 c_parser_sizeof_expression (c_parser
*parser
)
4854 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SIZEOF
));
4855 c_parser_consume_token (parser
);
4858 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4859 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4861 /* Either sizeof ( type-name ) or sizeof unary-expression
4862 starting with a compound literal. */
4863 struct c_type_name
*type_name
;
4864 c_parser_consume_token (parser
);
4865 type_name
= c_parser_type_name (parser
);
4866 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4867 if (type_name
== NULL
)
4872 ret
.value
= error_mark_node
;
4873 ret
.original_code
= ERROR_MARK
;
4876 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4878 expr
= c_parser_postfix_expression_after_paren_type (parser
,
4882 /* sizeof ( type-name ). */
4885 if (type_name
->declarator
->kind
== cdk_array
4886 && type_name
->declarator
->u
.array
.vla_unspec_p
)
4889 error ("%<[*]%> not allowed in other than a declaration");
4891 return c_expr_sizeof_type (type_name
);
4895 expr
= c_parser_unary_expression (parser
);
4899 if (TREE_CODE (expr
.value
) == COMPONENT_REF
4900 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
4901 error ("%<sizeof%> applied to a bit-field");
4902 return c_expr_sizeof_expr (expr
);
4906 /* Parse an alignof expression. */
4908 static struct c_expr
4909 c_parser_alignof_expression (c_parser
*parser
)
4912 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNOF
));
4913 c_parser_consume_token (parser
);
4916 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4917 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4919 /* Either __alignof__ ( type-name ) or __alignof__
4920 unary-expression starting with a compound literal. */
4921 struct c_type_name
*type_name
;
4923 c_parser_consume_token (parser
);
4924 type_name
= c_parser_type_name (parser
);
4925 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4926 if (type_name
== NULL
)
4931 ret
.value
= error_mark_node
;
4932 ret
.original_code
= ERROR_MARK
;
4935 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4937 expr
= c_parser_postfix_expression_after_paren_type (parser
,
4941 /* alignof ( type-name ). */
4944 ret
.value
= c_alignof (groktypename (type_name
));
4945 ret
.original_code
= ERROR_MARK
;
4951 expr
= c_parser_unary_expression (parser
);
4955 ret
.value
= c_alignof_expr (expr
.value
);
4956 ret
.original_code
= ERROR_MARK
;
4961 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
4965 postfix-expression [ expression ]
4966 postfix-expression ( argument-expression-list[opt] )
4967 postfix-expression . identifier
4968 postfix-expression -> identifier
4969 postfix-expression ++
4970 postfix-expression --
4971 ( type-name ) { initializer-list }
4972 ( type-name ) { initializer-list , }
4974 argument-expression-list:
4976 argument-expression-list , argument-expression
4988 (treated as a keyword in GNU C)
4991 ( compound-statement )
4992 __builtin_va_arg ( assignment-expression , type-name )
4993 __builtin_offsetof ( type-name , offsetof-member-designator )
4994 __builtin_choose_expr ( assignment-expression ,
4995 assignment-expression ,
4996 assignment-expression )
4997 __builtin_types_compatible_p ( type-name , type-name )
4999 offsetof-member-designator:
5001 offsetof-member-designator . identifier
5002 offsetof-member-designator [ expression ]
5007 [ objc-receiver objc-message-args ]
5008 @selector ( objc-selector-arg )
5009 @protocol ( identifier )
5010 @encode ( type-name )
5014 static struct c_expr
5015 c_parser_postfix_expression (c_parser
*parser
)
5017 struct c_expr expr
, e1
, e2
, e3
;
5018 struct c_type_name
*t1
, *t2
;
5019 switch (c_parser_peek_token (parser
)->type
)
5024 expr
.value
= c_parser_peek_token (parser
)->value
;
5025 expr
.original_code
= ERROR_MARK
;
5026 c_parser_consume_token (parser
);
5030 expr
.value
= c_parser_peek_token (parser
)->value
;
5031 expr
.original_code
= STRING_CST
;
5032 c_parser_consume_token (parser
);
5034 case CPP_OBJC_STRING
:
5035 gcc_assert (c_dialect_objc ());
5037 = objc_build_string_object (c_parser_peek_token (parser
)->value
);
5038 expr
.original_code
= ERROR_MARK
;
5039 c_parser_consume_token (parser
);
5042 if (c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
5044 c_parser_error (parser
, "expected expression");
5045 expr
.value
= error_mark_node
;
5046 expr
.original_code
= ERROR_MARK
;
5050 tree id
= c_parser_peek_token (parser
)->value
;
5051 location_t loc
= c_parser_peek_token (parser
)->location
;
5052 c_parser_consume_token (parser
);
5053 expr
.value
= build_external_ref (id
,
5054 (c_parser_peek_token (parser
)->type
5055 == CPP_OPEN_PAREN
), loc
);
5056 expr
.original_code
= ERROR_MARK
;
5059 case CPP_OPEN_PAREN
:
5060 /* A parenthesized expression, statement expression or compound
5062 if (c_parser_peek_2nd_token (parser
)->type
== CPP_OPEN_BRACE
)
5064 /* A statement expression. */
5066 c_parser_consume_token (parser
);
5067 c_parser_consume_token (parser
);
5068 if (cur_stmt_list
== NULL
)
5070 error ("braced-group within expression allowed "
5071 "only inside a function");
5072 parser
->error
= true;
5073 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
5074 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5075 expr
.value
= error_mark_node
;
5076 expr
.original_code
= ERROR_MARK
;
5079 stmt
= c_begin_stmt_expr ();
5080 c_parser_compound_statement_nostart (parser
);
5081 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5084 pedwarn ("ISO C forbids braced-groups within expressions");
5085 expr
.value
= c_finish_stmt_expr (stmt
);
5086 expr
.original_code
= ERROR_MARK
;
5088 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5090 /* A compound literal. ??? Can we actually get here rather
5091 than going directly to
5092 c_parser_postfix_expression_after_paren_type from
5094 struct c_type_name
*type_name
;
5095 c_parser_consume_token (parser
);
5096 type_name
= c_parser_type_name (parser
);
5097 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5099 if (type_name
== NULL
)
5101 expr
.value
= error_mark_node
;
5102 expr
.original_code
= ERROR_MARK
;
5105 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5110 /* A parenthesized expression. */
5111 c_parser_consume_token (parser
);
5112 expr
= c_parser_expression (parser
);
5113 if (TREE_CODE (expr
.value
) == MODIFY_EXPR
)
5114 TREE_NO_WARNING (expr
.value
) = 1;
5115 expr
.original_code
= ERROR_MARK
;
5116 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5121 switch (c_parser_peek_token (parser
)->keyword
)
5123 case RID_FUNCTION_NAME
:
5124 case RID_PRETTY_FUNCTION_NAME
:
5125 case RID_C99_FUNCTION_NAME
:
5126 expr
.value
= fname_decl (c_parser_peek_token (parser
)->keyword
,
5127 c_parser_peek_token (parser
)->value
);
5128 expr
.original_code
= ERROR_MARK
;
5129 c_parser_consume_token (parser
);
5132 c_parser_consume_token (parser
);
5133 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5135 expr
.value
= error_mark_node
;
5136 expr
.original_code
= ERROR_MARK
;
5139 e1
= c_parser_expr_no_commas (parser
, NULL
);
5140 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5142 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5143 expr
.value
= error_mark_node
;
5144 expr
.original_code
= ERROR_MARK
;
5147 t1
= c_parser_type_name (parser
);
5148 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5152 expr
.value
= error_mark_node
;
5153 expr
.original_code
= ERROR_MARK
;
5157 expr
.value
= build_va_arg (e1
.value
, groktypename (t1
));
5158 expr
.original_code
= ERROR_MARK
;
5162 c_parser_consume_token (parser
);
5163 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5165 expr
.value
= error_mark_node
;
5166 expr
.original_code
= ERROR_MARK
;
5169 t1
= c_parser_type_name (parser
);
5172 expr
.value
= error_mark_node
;
5173 expr
.original_code
= ERROR_MARK
;
5176 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5178 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5179 expr
.value
= error_mark_node
;
5180 expr
.original_code
= ERROR_MARK
;
5184 tree type
= groktypename (t1
);
5186 if (type
== error_mark_node
)
5187 offsetof_ref
= error_mark_node
;
5189 offsetof_ref
= build1 (INDIRECT_REF
, type
, NULL
);
5190 /* Parse the second argument to __builtin_offsetof. We
5191 must have one identifier, and beyond that we want to
5192 accept sub structure and sub array references. */
5193 if (c_parser_next_token_is (parser
, CPP_NAME
))
5195 offsetof_ref
= build_component_ref
5196 (offsetof_ref
, c_parser_peek_token (parser
)->value
);
5197 c_parser_consume_token (parser
);
5198 while (c_parser_next_token_is (parser
, CPP_DOT
)
5199 || c_parser_next_token_is (parser
,
5202 if (c_parser_next_token_is (parser
, CPP_DOT
))
5204 c_parser_consume_token (parser
);
5205 if (c_parser_next_token_is_not (parser
,
5208 c_parser_error (parser
, "expected identifier");
5211 offsetof_ref
= build_component_ref
5213 c_parser_peek_token (parser
)->value
);
5214 c_parser_consume_token (parser
);
5219 c_parser_consume_token (parser
);
5220 idx
= c_parser_expression (parser
).value
;
5221 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5223 offsetof_ref
= build_array_ref (offsetof_ref
, idx
);
5228 c_parser_error (parser
, "expected identifier");
5229 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5231 expr
.value
= fold_offsetof (offsetof_ref
);
5232 expr
.original_code
= ERROR_MARK
;
5235 case RID_CHOOSE_EXPR
:
5236 c_parser_consume_token (parser
);
5237 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5239 expr
.value
= error_mark_node
;
5240 expr
.original_code
= ERROR_MARK
;
5243 e1
= c_parser_expr_no_commas (parser
, NULL
);
5244 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5246 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5247 expr
.value
= error_mark_node
;
5248 expr
.original_code
= ERROR_MARK
;
5251 e2
= c_parser_expr_no_commas (parser
, NULL
);
5252 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5254 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5255 expr
.value
= error_mark_node
;
5256 expr
.original_code
= ERROR_MARK
;
5259 e3
= c_parser_expr_no_commas (parser
, NULL
);
5260 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5265 c
= fold (e1
.value
);
5266 if (TREE_CODE (c
) != INTEGER_CST
)
5267 error ("first argument to %<__builtin_choose_expr%> not"
5269 expr
= integer_zerop (c
) ? e3
: e2
;
5272 case RID_TYPES_COMPATIBLE_P
:
5273 c_parser_consume_token (parser
);
5274 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5276 expr
.value
= error_mark_node
;
5277 expr
.original_code
= ERROR_MARK
;
5280 t1
= c_parser_type_name (parser
);
5283 expr
.value
= error_mark_node
;
5284 expr
.original_code
= ERROR_MARK
;
5287 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5289 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5290 expr
.value
= error_mark_node
;
5291 expr
.original_code
= ERROR_MARK
;
5294 t2
= c_parser_type_name (parser
);
5297 expr
.value
= error_mark_node
;
5298 expr
.original_code
= ERROR_MARK
;
5301 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5306 e1
= TYPE_MAIN_VARIANT (groktypename (t1
));
5307 e2
= TYPE_MAIN_VARIANT (groktypename (t2
));
5309 expr
.value
= comptypes (e1
, e2
)
5310 ? build_int_cst (NULL_TREE
, 1)
5311 : build_int_cst (NULL_TREE
, 0);
5312 expr
.original_code
= ERROR_MARK
;
5315 case RID_AT_SELECTOR
:
5316 gcc_assert (c_dialect_objc ());
5317 c_parser_consume_token (parser
);
5318 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5320 expr
.value
= error_mark_node
;
5321 expr
.original_code
= ERROR_MARK
;
5325 tree sel
= c_parser_objc_selector_arg (parser
);
5326 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5328 expr
.value
= objc_build_selector_expr (sel
);
5329 expr
.original_code
= ERROR_MARK
;
5332 case RID_AT_PROTOCOL
:
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
;
5341 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5343 c_parser_error (parser
, "expected identifier");
5344 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5345 expr
.value
= error_mark_node
;
5346 expr
.original_code
= ERROR_MARK
;
5350 tree id
= c_parser_peek_token (parser
)->value
;
5351 c_parser_consume_token (parser
);
5352 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5354 expr
.value
= objc_build_protocol_expr (id
);
5355 expr
.original_code
= ERROR_MARK
;
5359 /* Extension to support C-structures in the archiver. */
5360 gcc_assert (c_dialect_objc ());
5361 c_parser_consume_token (parser
);
5362 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5364 expr
.value
= error_mark_node
;
5365 expr
.original_code
= ERROR_MARK
;
5368 t1
= c_parser_type_name (parser
);
5371 expr
.value
= error_mark_node
;
5372 expr
.original_code
= ERROR_MARK
;
5373 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5376 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5379 tree type
= groktypename (t1
);
5380 expr
.value
= objc_build_encode_expr (type
);
5381 expr
.original_code
= ERROR_MARK
;
5385 c_parser_error (parser
, "expected expression");
5386 expr
.value
= error_mark_node
;
5387 expr
.original_code
= ERROR_MARK
;
5391 case CPP_OPEN_SQUARE
:
5392 if (c_dialect_objc ())
5394 tree receiver
, args
;
5395 c_parser_consume_token (parser
);
5396 receiver
= c_parser_objc_receiver (parser
);
5397 args
= c_parser_objc_message_args (parser
);
5398 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5400 expr
.value
= objc_build_message_expr (build_tree_list (receiver
,
5402 expr
.original_code
= ERROR_MARK
;
5405 /* Else fall through to report error. */
5407 c_parser_error (parser
, "expected expression");
5408 expr
.value
= error_mark_node
;
5409 expr
.original_code
= ERROR_MARK
;
5412 return c_parser_postfix_expression_after_primary (parser
, expr
);
5415 /* Parse a postfix expression after a parenthesized type name: the
5416 brace-enclosed initializer of a compound literal, possibly followed
5417 by some postfix operators. This is separate because it is not
5418 possible to tell until after the type name whether a cast
5419 expression has a cast or a compound literal, or whether the operand
5420 of sizeof is a parenthesized type name or starts with a compound
5423 static struct c_expr
5424 c_parser_postfix_expression_after_paren_type (c_parser
*parser
,
5425 struct c_type_name
*type_name
)
5430 start_init (NULL_TREE
, NULL
, 0);
5431 type
= groktypename (type_name
);
5432 if (C_TYPE_VARIABLE_SIZE (type
))
5434 error ("compound literal has variable size");
5435 type
= error_mark_node
;
5437 init
= c_parser_braced_init (parser
, type
, false);
5439 maybe_warn_string_init (type
, init
);
5441 if (pedantic
&& !flag_isoc99
)
5442 pedwarn ("ISO C90 forbids compound literals");
5443 expr
.value
= build_compound_literal (type
, init
.value
);
5444 expr
.original_code
= ERROR_MARK
;
5445 return c_parser_postfix_expression_after_primary (parser
, expr
);
5448 /* Parse a postfix expression after the initial primary or compound
5449 literal; that is, parse a series of postfix operators. */
5451 static struct c_expr
5452 c_parser_postfix_expression_after_primary (c_parser
*parser
,
5455 tree ident
, idx
, exprlist
;
5458 switch (c_parser_peek_token (parser
)->type
)
5460 case CPP_OPEN_SQUARE
:
5461 /* Array reference. */
5462 c_parser_consume_token (parser
);
5463 idx
= c_parser_expression (parser
).value
;
5464 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5466 expr
.value
= build_array_ref (expr
.value
, idx
);
5467 expr
.original_code
= ERROR_MARK
;
5469 case CPP_OPEN_PAREN
:
5470 /* Function call. */
5471 c_parser_consume_token (parser
);
5472 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5473 exprlist
= NULL_TREE
;
5475 exprlist
= c_parser_expr_list (parser
, true);
5476 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5478 expr
.value
= build_function_call (expr
.value
, exprlist
);
5479 expr
.original_code
= ERROR_MARK
;
5482 /* Structure element reference. */
5483 c_parser_consume_token (parser
);
5484 expr
= default_function_array_conversion (expr
);
5485 if (c_parser_next_token_is (parser
, CPP_NAME
))
5486 ident
= c_parser_peek_token (parser
)->value
;
5489 c_parser_error (parser
, "expected identifier");
5490 expr
.value
= error_mark_node
;
5491 expr
.original_code
= ERROR_MARK
;
5494 c_parser_consume_token (parser
);
5495 expr
.value
= build_component_ref (expr
.value
, ident
);
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 (build_indirect_ref (expr
.value
,
5514 expr
.original_code
= ERROR_MARK
;
5517 /* Postincrement. */
5518 c_parser_consume_token (parser
);
5519 expr
= default_function_array_conversion (expr
);
5520 expr
.value
= build_unary_op (POSTINCREMENT_EXPR
, expr
.value
, 0);
5521 expr
.original_code
= ERROR_MARK
;
5523 case CPP_MINUS_MINUS
:
5524 /* Postdecrement. */
5525 c_parser_consume_token (parser
);
5526 expr
= default_function_array_conversion (expr
);
5527 expr
.value
= build_unary_op (POSTDECREMENT_EXPR
, expr
.value
, 0);
5528 expr
.original_code
= ERROR_MARK
;
5536 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5539 assignment-expression
5540 expression , assignment-expression
5543 static struct c_expr
5544 c_parser_expression (c_parser
*parser
)
5547 expr
= c_parser_expr_no_commas (parser
, NULL
);
5548 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5551 c_parser_consume_token (parser
);
5552 next
= c_parser_expr_no_commas (parser
, NULL
);
5553 next
= default_function_array_conversion (next
);
5554 expr
.value
= build_compound_expr (expr
.value
, next
.value
);
5555 expr
.original_code
= COMPOUND_EXPR
;
5560 /* Parse an expression and convert functions or arrays to
5563 static struct c_expr
5564 c_parser_expression_conv (c_parser
*parser
)
5567 expr
= c_parser_expression (parser
);
5568 expr
= default_function_array_conversion (expr
);
5572 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5573 functions and arrays to pointers.
5576 assignment-expression
5577 nonempty-expr-list , assignment-expression
5581 c_parser_expr_list (c_parser
*parser
, bool convert_p
)
5585 expr
= c_parser_expr_no_commas (parser
, NULL
);
5587 expr
= default_function_array_conversion (expr
);
5588 ret
= cur
= build_tree_list (NULL_TREE
, expr
.value
);
5589 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5591 c_parser_consume_token (parser
);
5592 expr
= c_parser_expr_no_commas (parser
, NULL
);
5594 expr
= default_function_array_conversion (expr
);
5595 cur
= TREE_CHAIN (cur
) = build_tree_list (NULL_TREE
, expr
.value
);
5601 /* Parse Objective-C-specific constructs. */
5603 /* Parse an objc-class-definition.
5605 objc-class-definition:
5606 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5607 objc-class-instance-variables[opt] objc-methodprotolist @end
5608 @implementation identifier objc-superclass[opt]
5609 objc-class-instance-variables[opt]
5610 @interface identifier ( identifier ) objc-protocol-refs[opt]
5611 objc-methodprotolist @end
5612 @implementation identifier ( identifier )
5617 "@interface identifier (" must start "@interface identifier (
5618 identifier ) ...": objc-methodprotolist in the first production may
5619 not start with a parenthesized identifier as a declarator of a data
5620 definition with no declaration specifiers if the objc-superclass,
5621 objc-protocol-refs and objc-class-instance-variables are omitted. */
5624 c_parser_objc_class_definition (c_parser
*parser
)
5629 if (c_parser_next_token_is_keyword (parser
, RID_AT_INTERFACE
))
5631 else if (c_parser_next_token_is_keyword (parser
, RID_AT_IMPLEMENTATION
))
5635 c_parser_consume_token (parser
);
5636 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5638 c_parser_error (parser
, "expected identifier");
5641 id1
= c_parser_peek_token (parser
)->value
;
5642 c_parser_consume_token (parser
);
5643 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
5646 tree proto
= NULL_TREE
;
5647 c_parser_consume_token (parser
);
5648 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5650 c_parser_error (parser
, "expected identifier");
5651 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5654 id2
= c_parser_peek_token (parser
)->value
;
5655 c_parser_consume_token (parser
);
5656 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5659 objc_start_category_implementation (id1
, id2
);
5662 if (c_parser_next_token_is (parser
, CPP_LESS
))
5663 proto
= c_parser_objc_protocol_refs (parser
);
5664 objc_start_category_interface (id1
, id2
, proto
);
5665 c_parser_objc_methodprotolist (parser
);
5666 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5667 objc_finish_interface ();
5670 if (c_parser_next_token_is (parser
, CPP_COLON
))
5672 c_parser_consume_token (parser
);
5673 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5675 c_parser_error (parser
, "expected identifier");
5678 superclass
= c_parser_peek_token (parser
)->value
;
5679 c_parser_consume_token (parser
);
5682 superclass
= NULL_TREE
;
5685 tree proto
= NULL_TREE
;
5686 if (c_parser_next_token_is (parser
, CPP_LESS
))
5687 proto
= c_parser_objc_protocol_refs (parser
);
5688 objc_start_class_interface (id1
, superclass
, proto
);
5691 objc_start_class_implementation (id1
, superclass
);
5692 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5693 c_parser_objc_class_instance_variables (parser
);
5696 objc_continue_interface ();
5697 c_parser_objc_methodprotolist (parser
);
5698 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5699 objc_finish_interface ();
5703 objc_continue_implementation ();
5708 /* Parse objc-class-instance-variables.
5710 objc-class-instance-variables:
5711 { objc-instance-variable-decl-list[opt] }
5713 objc-instance-variable-decl-list:
5714 objc-visibility-spec
5715 objc-instance-variable-decl ;
5717 objc-instance-variable-decl-list objc-visibility-spec
5718 objc-instance-variable-decl-list objc-instance-variable-decl ;
5719 objc-instance-variable-decl-list ;
5721 objc-visibility-spec:
5726 objc-instance-variable-decl:
5731 c_parser_objc_class_instance_variables (c_parser
*parser
)
5733 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
5734 c_parser_consume_token (parser
);
5735 while (c_parser_next_token_is_not (parser
, CPP_EOF
))
5738 /* Parse any stray semicolon. */
5739 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
5742 pedwarn ("extra semicolon in struct or union specified");
5743 c_parser_consume_token (parser
);
5746 /* Stop if at the end of the instance variables. */
5747 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
5749 c_parser_consume_token (parser
);
5752 /* Parse any objc-visibility-spec. */
5753 if (c_parser_next_token_is_keyword (parser
, RID_AT_PRIVATE
))
5755 c_parser_consume_token (parser
);
5756 objc_set_visibility (2);
5759 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PROTECTED
))
5761 c_parser_consume_token (parser
);
5762 objc_set_visibility (0);
5765 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PUBLIC
))
5767 c_parser_consume_token (parser
);
5768 objc_set_visibility (1);
5771 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
5773 c_parser_pragma (parser
, pragma_external
);
5777 /* Parse some comma-separated declarations. */
5778 decls
= c_parser_struct_declaration (parser
);
5780 /* Comma-separated instance variables are chained together in
5781 reverse order; add them one by one. */
5782 tree ivar
= nreverse (decls
);
5783 for (; ivar
; ivar
= TREE_CHAIN (ivar
))
5784 objc_add_instance_variable (copy_node (ivar
));
5786 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5790 /* Parse an objc-class-declaration.
5792 objc-class-declaration:
5793 @class identifier-list ;
5797 c_parser_objc_class_declaration (c_parser
*parser
)
5799 tree list
= NULL_TREE
;
5800 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_CLASS
));
5801 c_parser_consume_token (parser
);
5802 /* Any identifiers, including those declared as type names, are OK
5807 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5809 c_parser_error (parser
, "expected identifier");
5812 id
= c_parser_peek_token (parser
)->value
;
5813 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
5814 c_parser_consume_token (parser
);
5815 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5816 c_parser_consume_token (parser
);
5820 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5821 objc_declare_class (list
);
5824 /* Parse an objc-alias-declaration.
5826 objc-alias-declaration:
5827 @compatibility_alias identifier identifier ;
5831 c_parser_objc_alias_declaration (c_parser
*parser
)
5834 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_ALIAS
));
5835 c_parser_consume_token (parser
);
5836 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5838 c_parser_error (parser
, "expected identifier");
5839 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
5842 id1
= c_parser_peek_token (parser
)->value
;
5843 c_parser_consume_token (parser
);
5844 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5846 c_parser_error (parser
, "expected identifier");
5847 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
5850 id2
= c_parser_peek_token (parser
)->value
;
5851 c_parser_consume_token (parser
);
5852 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5853 objc_declare_alias (id1
, id2
);
5856 /* Parse an objc-protocol-definition.
5858 objc-protocol-definition:
5859 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
5860 @protocol identifier-list ;
5862 "@protocol identifier ;" should be resolved as "@protocol
5863 identifier-list ;": objc-methodprotolist may not start with a
5864 semicolon in the first alternative if objc-protocol-refs are
5868 c_parser_objc_protocol_definition (c_parser
*parser
)
5870 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROTOCOL
));
5871 c_parser_consume_token (parser
);
5872 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5874 c_parser_error (parser
, "expected identifier");
5877 if (c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
5878 || c_parser_peek_2nd_token (parser
)->type
== CPP_SEMICOLON
)
5880 tree list
= NULL_TREE
;
5881 /* Any identifiers, including those declared as type names, are
5886 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5888 c_parser_error (parser
, "expected identifier");
5891 id
= c_parser_peek_token (parser
)->value
;
5892 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
5893 c_parser_consume_token (parser
);
5894 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5895 c_parser_consume_token (parser
);
5899 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5900 objc_declare_protocols (list
);
5904 tree id
= c_parser_peek_token (parser
)->value
;
5905 tree proto
= NULL_TREE
;
5906 c_parser_consume_token (parser
);
5907 if (c_parser_next_token_is (parser
, CPP_LESS
))
5908 proto
= c_parser_objc_protocol_refs (parser
);
5909 objc_pq_context
= 1;
5910 objc_start_protocol (id
, proto
);
5911 c_parser_objc_methodprotolist (parser
);
5912 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5913 objc_pq_context
= 0;
5914 objc_finish_interface ();
5918 /* Parse an objc-method-type.
5925 static enum tree_code
5926 c_parser_objc_method_type (c_parser
*parser
)
5928 switch (c_parser_peek_token (parser
)->type
)
5931 c_parser_consume_token (parser
);
5934 c_parser_consume_token (parser
);
5941 /* Parse an objc-method-definition.
5943 objc-method-definition:
5944 objc-method-type objc-method-decl ;[opt] compound-statement
5948 c_parser_objc_method_definition (c_parser
*parser
)
5950 enum tree_code type
= c_parser_objc_method_type (parser
);
5952 objc_set_method_type (type
);
5953 objc_pq_context
= 1;
5954 decl
= c_parser_objc_method_decl (parser
);
5955 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
5957 c_parser_consume_token (parser
);
5959 pedwarn ("extra semicolon in method definition specified");
5961 if (!c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5963 c_parser_error (parser
, "expected %<{%>");
5966 objc_pq_context
= 0;
5967 objc_start_method_definition (decl
);
5968 add_stmt (c_parser_compound_statement (parser
));
5969 objc_finish_method_definition (current_function_decl
);
5972 /* Parse an objc-methodprotolist.
5974 objc-methodprotolist:
5976 objc-methodprotolist objc-methodproto
5977 objc-methodprotolist declaration
5978 objc-methodprotolist ;
5980 The declaration is a data definition, which may be missing
5981 declaration specifiers under the same rules and diagnostics as
5982 other data definitions outside functions, and the stray semicolon
5983 is diagnosed the same way as a stray semicolon outside a
5987 c_parser_objc_methodprotolist (c_parser
*parser
)
5991 /* The list is terminated by @end. */
5992 switch (c_parser_peek_token (parser
)->type
)
5996 pedwarn ("ISO C does not allow extra %<;%> outside of a function");
5997 c_parser_consume_token (parser
);
6001 c_parser_objc_methodproto (parser
);
6004 c_parser_pragma (parser
, pragma_external
);
6009 if (c_parser_next_token_is_keyword (parser
, RID_AT_END
))
6011 c_parser_declaration_or_fndef (parser
, false, true, false, true);
6017 /* Parse an objc-methodproto.
6020 objc-method-type objc-method-decl ;
6024 c_parser_objc_methodproto (c_parser
*parser
)
6026 enum tree_code type
= c_parser_objc_method_type (parser
);
6028 objc_set_method_type (type
);
6029 /* Remember protocol qualifiers in prototypes. */
6030 objc_pq_context
= 1;
6031 decl
= c_parser_objc_method_decl (parser
);
6032 /* Forget protocol qualifiers here. */
6033 objc_pq_context
= 0;
6034 objc_add_method_declaration (decl
);
6035 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6038 /* Parse an objc-method-decl.
6041 ( objc-type-name ) objc-selector
6043 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6044 objc-keyword-selector objc-optparmlist
6046 objc-keyword-selector:
6048 objc-keyword-selector objc-keyword-decl
6051 objc-selector : ( objc-type-name ) identifier
6052 objc-selector : identifier
6053 : ( objc-type-name ) identifier
6057 objc-optparms objc-optellipsis
6061 objc-opt-parms , parameter-declaration
6069 c_parser_objc_method_decl (c_parser
*parser
)
6071 tree type
= NULL_TREE
;
6073 tree parms
= NULL_TREE
;
6074 bool ellipsis
= false;
6076 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6078 c_parser_consume_token (parser
);
6079 type
= c_parser_objc_type_name (parser
);
6080 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6082 sel
= c_parser_objc_selector (parser
);
6083 /* If there is no selector, or a colon follows, we have an
6084 objc-keyword-selector. If there is a selector, and a colon does
6085 not follow, that selector ends the objc-method-decl. */
6086 if (!sel
|| c_parser_next_token_is (parser
, CPP_COLON
))
6089 tree list
= NULL_TREE
;
6092 tree atype
= NULL_TREE
, id
, keyworddecl
;
6093 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6095 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6097 c_parser_consume_token (parser
);
6098 atype
= c_parser_objc_type_name (parser
);
6099 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6102 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6104 c_parser_error (parser
, "expected identifier");
6105 return error_mark_node
;
6107 id
= c_parser_peek_token (parser
)->value
;
6108 c_parser_consume_token (parser
);
6109 keyworddecl
= objc_build_keyword_decl (tsel
, atype
, id
);
6110 list
= chainon (list
, keyworddecl
);
6111 tsel
= c_parser_objc_selector (parser
);
6112 if (!tsel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6115 /* Parse the optional parameter list. Optional Objective-C
6116 method parameters follow the C syntax, and may include '...'
6117 to denote a variable number of arguments. */
6118 parms
= make_node (TREE_LIST
);
6119 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6121 struct c_parm
*parm
;
6122 c_parser_consume_token (parser
);
6123 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
6126 c_parser_consume_token (parser
);
6129 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6132 parms
= chainon (parms
,
6133 build_tree_list (NULL_TREE
, grokparm (parm
)));
6137 return objc_build_method_signature (type
, sel
, parms
, ellipsis
);
6140 /* Parse an objc-type-name.
6143 objc-type-qualifiers[opt] type-name
6144 objc-type-qualifiers[opt]
6146 objc-type-qualifiers:
6148 objc-type-qualifiers objc-type-qualifier
6150 objc-type-qualifier: one of
6151 in out inout bycopy byref oneway
6155 c_parser_objc_type_name (c_parser
*parser
)
6157 tree quals
= NULL_TREE
;
6158 struct c_type_name
*typename
= NULL
;
6159 tree type
= NULL_TREE
;
6162 c_token
*token
= c_parser_peek_token (parser
);
6163 if (token
->type
== CPP_KEYWORD
6164 && (token
->keyword
== RID_IN
6165 || token
->keyword
== RID_OUT
6166 || token
->keyword
== RID_INOUT
6167 || token
->keyword
== RID_BYCOPY
6168 || token
->keyword
== RID_BYREF
6169 || token
->keyword
== RID_ONEWAY
))
6171 quals
= chainon (quals
, build_tree_list (NULL_TREE
, token
->value
));
6172 c_parser_consume_token (parser
);
6177 if (c_parser_next_token_starts_typename (parser
))
6178 typename
= c_parser_type_name (parser
);
6180 type
= groktypename (typename
);
6181 return build_tree_list (quals
, type
);
6184 /* Parse objc-protocol-refs.
6191 c_parser_objc_protocol_refs (c_parser
*parser
)
6193 tree list
= NULL_TREE
;
6194 gcc_assert (c_parser_next_token_is (parser
, CPP_LESS
));
6195 c_parser_consume_token (parser
);
6196 /* Any identifiers, including those declared as type names, are OK
6201 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6203 c_parser_error (parser
, "expected identifier");
6206 id
= c_parser_peek_token (parser
)->value
;
6207 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
6208 c_parser_consume_token (parser
);
6209 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6210 c_parser_consume_token (parser
);
6214 c_parser_require (parser
, CPP_GREATER
, "expected %<>%>");
6218 /* Parse an objc-try-catch-statement.
6220 objc-try-catch-statement:
6221 @try compound-statement objc-catch-list[opt]
6222 @try compound-statement objc-catch-list[opt] @finally compound-statement
6225 @catch ( parameter-declaration ) compound-statement
6226 objc-catch-list @catch ( parameter-declaration ) compound-statement
6230 c_parser_objc_try_catch_statement (c_parser
*parser
)
6234 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_TRY
));
6235 c_parser_consume_token (parser
);
6236 loc
= c_parser_peek_token (parser
)->location
;
6237 stmt
= c_parser_compound_statement (parser
);
6238 objc_begin_try_stmt (loc
, stmt
);
6239 while (c_parser_next_token_is_keyword (parser
, RID_AT_CATCH
))
6241 struct c_parm
*parm
;
6242 c_parser_consume_token (parser
);
6243 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6245 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6248 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6251 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6252 objc_begin_catch_clause (grokparm (parm
));
6253 if (c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
6254 c_parser_compound_statement_nostart (parser
);
6255 objc_finish_catch_clause ();
6257 if (c_parser_next_token_is_keyword (parser
, RID_AT_FINALLY
))
6261 c_parser_consume_token (parser
);
6262 finloc
= c_parser_peek_token (parser
)->location
;
6263 finstmt
= c_parser_compound_statement (parser
);
6264 objc_build_finally_clause (finloc
, finstmt
);
6266 objc_finish_try_stmt ();
6269 /* Parse an objc-synchronized-statement.
6271 objc-synchronized-statement:
6272 @synchronized ( expression ) compound-statement
6276 c_parser_objc_synchronized_statement (c_parser
*parser
)
6280 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNCHRONIZED
));
6281 c_parser_consume_token (parser
);
6282 loc
= c_parser_peek_token (parser
)->location
;
6283 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6285 expr
= c_parser_expression (parser
).value
;
6286 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6289 expr
= error_mark_node
;
6290 stmt
= c_parser_compound_statement (parser
);
6291 objc_build_synchronized (loc
, expr
, stmt
);
6294 /* Parse an objc-selector; return NULL_TREE without an error if the
6295 next token is not an objc-selector.
6300 enum struct union if else while do for switch case default
6301 break continue return goto asm sizeof typeof __alignof
6302 unsigned long const short volatile signed restrict _Complex
6303 in out inout bycopy byref oneway int char float double void _Bool
6305 ??? Why this selection of keywords but not, for example, storage
6306 class specifiers? */
6309 c_parser_objc_selector (c_parser
*parser
)
6311 c_token
*token
= c_parser_peek_token (parser
);
6312 tree value
= token
->value
;
6313 if (token
->type
== CPP_NAME
)
6315 c_parser_consume_token (parser
);
6318 if (token
->type
!= CPP_KEYWORD
)
6320 switch (token
->keyword
)
6361 c_parser_consume_token (parser
);
6368 /* Parse an objc-selector-arg.
6372 objc-keywordname-list
6374 objc-keywordname-list:
6376 objc-keywordname-list objc-keywordname
6384 c_parser_objc_selector_arg (c_parser
*parser
)
6386 tree sel
= c_parser_objc_selector (parser
);
6387 tree list
= NULL_TREE
;
6388 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6392 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6394 list
= chainon (list
, build_tree_list (sel
, NULL_TREE
));
6395 sel
= c_parser_objc_selector (parser
);
6396 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6402 /* Parse an objc-receiver.
6411 c_parser_objc_receiver (c_parser
*parser
)
6413 if (c_parser_peek_token (parser
)->type
== CPP_NAME
6414 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
6415 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
6417 tree id
= c_parser_peek_token (parser
)->value
;
6418 c_parser_consume_token (parser
);
6419 return objc_get_class_reference (id
);
6421 return c_parser_expression (parser
).value
;
6424 /* Parse objc-message-args.
6428 objc-keywordarg-list
6430 objc-keywordarg-list:
6432 objc-keywordarg-list objc-keywordarg
6435 objc-selector : objc-keywordexpr
6440 c_parser_objc_message_args (c_parser
*parser
)
6442 tree sel
= c_parser_objc_selector (parser
);
6443 tree list
= NULL_TREE
;
6444 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6449 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6451 keywordexpr
= c_parser_objc_keywordexpr (parser
);
6452 list
= chainon (list
, build_tree_list (sel
, keywordexpr
));
6453 sel
= c_parser_objc_selector (parser
);
6454 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6460 /* Parse an objc-keywordexpr.
6467 c_parser_objc_keywordexpr (c_parser
*parser
)
6469 tree list
= c_parser_expr_list (parser
, true);
6470 if (TREE_CHAIN (list
) == NULL_TREE
)
6472 /* Just return the expression, remove a level of
6474 return TREE_VALUE (list
);
6478 /* We have a comma expression, we will collapse later. */
6484 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6485 should be considered, statements. ALLOW_STMT is true if we're within
6486 the context of a function and such pragmas are to be allowed. Returns
6487 true if we actually parsed such a pragma. */
6490 c_parser_pragma (c_parser
*parser
, enum pragma_context context
)
6494 id
= c_parser_peek_token (parser
)->pragma_kind
;
6495 gcc_assert (id
!= PRAGMA_NONE
);
6499 case PRAGMA_OMP_BARRIER
:
6500 if (context
!= pragma_compound
)
6502 if (context
== pragma_stmt
)
6503 c_parser_error (parser
, "%<#pragma omp barrier%> may only be "
6504 "used in compound statements");
6507 c_parser_omp_barrier (parser
);
6510 case PRAGMA_OMP_FLUSH
:
6511 if (context
!= pragma_compound
)
6513 if (context
== pragma_stmt
)
6514 c_parser_error (parser
, "%<#pragma omp flush%> may only be "
6515 "used in compound statements");
6518 c_parser_omp_flush (parser
);
6521 case PRAGMA_OMP_THREADPRIVATE
:
6522 c_parser_omp_threadprivate (parser
);
6525 case PRAGMA_OMP_SECTION
:
6526 error ("%<#pragma omp section%> may only be used in "
6527 "%<#pragma omp sections%> construct");
6528 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6531 case PRAGMA_GCC_PCH_PREPROCESS
:
6532 c_parser_error (parser
, "%<#pragma GCC pch_preprocess%> must be first");
6533 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6537 if (id
< PRAGMA_FIRST_EXTERNAL
)
6539 if (context
== pragma_external
)
6542 c_parser_error (parser
, "expected declaration specifiers");
6543 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6546 c_parser_omp_construct (parser
);
6552 c_parser_consume_pragma (parser
);
6553 c_invoke_pragma_handler (id
);
6555 /* Skip to EOL, but suppress any error message. Those will have been
6556 generated by the handler routine through calling error, as opposed
6557 to calling c_parser_error. */
6558 parser
->error
= true;
6559 c_parser_skip_to_pragma_eol (parser
);
6564 /* The interface the pragma parsers have to the lexer. */
6567 pragma_lex (tree
*value
)
6569 c_token
*tok
= c_parser_peek_token (the_parser
);
6570 enum cpp_ttype ret
= tok
->type
;
6572 *value
= tok
->value
;
6573 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
6577 if (ret
== CPP_KEYWORD
)
6579 c_parser_consume_token (the_parser
);
6586 c_parser_pragma_pch_preprocess (c_parser
*parser
)
6590 c_parser_consume_pragma (parser
);
6591 if (c_parser_next_token_is (parser
, CPP_STRING
))
6593 name
= c_parser_peek_token (parser
)->value
;
6594 c_parser_consume_token (parser
);
6597 c_parser_error (parser
, "expected string literal");
6598 c_parser_skip_to_pragma_eol (parser
);
6601 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
6604 /* OpenMP 2.5 parsing routines. */
6606 /* Returns name of the next clause.
6607 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6608 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6609 returned and the token is consumed. */
6611 static pragma_omp_clause
6612 c_parser_omp_clause_name (c_parser
*parser
)
6614 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
6616 if (c_parser_next_token_is_keyword (parser
, RID_IF
))
6617 result
= PRAGMA_OMP_CLAUSE_IF
;
6618 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
6619 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
6620 else if (c_parser_next_token_is (parser
, CPP_NAME
))
6622 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6627 if (!strcmp ("copyin", p
))
6628 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
6629 else if (!strcmp ("copyprivate", p
))
6630 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
6633 if (!strcmp ("firstprivate", p
))
6634 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
6637 if (!strcmp ("lastprivate", p
))
6638 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
6641 if (!strcmp ("nowait", p
))
6642 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
6643 else if (!strcmp ("num_threads", p
))
6644 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
6647 if (!strcmp ("ordered", p
))
6648 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
6651 if (!strcmp ("private", p
))
6652 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
6655 if (!strcmp ("reduction", p
))
6656 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
6659 if (!strcmp ("schedule", p
))
6660 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
6661 else if (!strcmp ("shared", p
))
6662 result
= PRAGMA_OMP_CLAUSE_SHARED
;
6667 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
6668 c_parser_consume_token (parser
);
6673 /* Validate that a clause of the given type does not already exist. */
6676 check_no_duplicate_clause (tree clauses
, enum tree_code code
, const char *name
)
6680 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
6681 if (OMP_CLAUSE_CODE (c
) == code
)
6683 error ("too many %qs clauses", name
);
6691 variable-list , identifier
6693 If KIND is nonzero, create the appropriate node and install the decl
6694 in OMP_CLAUSE_DECL and add the node to the head of the list.
6696 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6697 return the list created. */
6700 c_parser_omp_variable_list (c_parser
*parser
, enum omp_clause_code kind
,
6703 if (c_parser_next_token_is_not (parser
, CPP_NAME
)
6704 || c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
6705 c_parser_error (parser
, "expected identifier");
6707 while (c_parser_next_token_is (parser
, CPP_NAME
)
6708 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
6710 tree t
= lookup_name (c_parser_peek_token (parser
)->value
);
6713 undeclared_variable (c_parser_peek_token (parser
)->value
,
6714 c_parser_peek_token (parser
)->location
);
6715 else if (t
== error_mark_node
)
6719 tree u
= build_omp_clause (kind
);
6720 OMP_CLAUSE_DECL (u
) = t
;
6721 OMP_CLAUSE_CHAIN (u
) = list
;
6725 list
= tree_cons (t
, NULL_TREE
, list
);
6727 c_parser_consume_token (parser
);
6729 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
6732 c_parser_consume_token (parser
);
6738 /* Similarly, but expect leading and trailing parenthesis. This is a very
6739 common case for omp clauses. */
6742 c_parser_omp_var_list_parens (c_parser
*parser
, enum tree_code kind
, tree list
)
6744 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6746 list
= c_parser_omp_variable_list (parser
, kind
, list
);
6747 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6753 copyin ( variable-list ) */
6756 c_parser_omp_clause_copyin (c_parser
*parser
, tree list
)
6758 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYIN
, list
);
6762 copyprivate ( variable-list ) */
6765 c_parser_omp_clause_copyprivate (c_parser
*parser
, tree list
)
6767 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYPRIVATE
, list
);
6771 default ( shared | none ) */
6774 c_parser_omp_clause_default (c_parser
*parser
, tree list
)
6776 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
6779 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6781 if (c_parser_next_token_is (parser
, CPP_NAME
))
6783 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6788 if (strcmp ("none", p
) != 0)
6790 kind
= OMP_CLAUSE_DEFAULT_NONE
;
6794 if (strcmp ("shared", p
) != 0)
6796 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
6803 c_parser_consume_token (parser
);
6808 c_parser_error (parser
, "expected %<none%> or %<shared%>");
6810 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6812 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
6815 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default");
6816 c
= build_omp_clause (OMP_CLAUSE_DEFAULT
);
6817 OMP_CLAUSE_CHAIN (c
) = list
;
6818 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
6824 firstprivate ( variable-list ) */
6827 c_parser_omp_clause_firstprivate (c_parser
*parser
, tree list
)
6829 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_FIRSTPRIVATE
, list
);
6833 if ( expression ) */
6836 c_parser_omp_clause_if (c_parser
*parser
, tree list
)
6838 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6840 tree t
= c_parser_paren_condition (parser
);
6843 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if");
6845 c
= build_omp_clause (OMP_CLAUSE_IF
);
6846 OMP_CLAUSE_IF_EXPR (c
) = t
;
6847 OMP_CLAUSE_CHAIN (c
) = list
;
6851 c_parser_error (parser
, "expected %<(%>");
6857 lastprivate ( variable-list ) */
6860 c_parser_omp_clause_lastprivate (c_parser
*parser
, tree list
)
6862 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_LASTPRIVATE
, list
);
6869 c_parser_omp_clause_nowait (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
6873 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait");
6875 c
= build_omp_clause (OMP_CLAUSE_NOWAIT
);
6876 OMP_CLAUSE_CHAIN (c
) = list
;
6881 num_threads ( expression ) */
6884 c_parser_omp_clause_num_threads (c_parser
*parser
, tree list
)
6886 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6888 tree c
, t
= c_parser_expression (parser
).value
;
6890 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6892 if (!INTEGRAL_TYPE_P (TREE_TYPE (t
)))
6894 c_parser_error (parser
, "expected integer expression");
6898 /* Attempt to statically determine when the number isn't positive. */
6899 c
= fold_build2 (LE_EXPR
, boolean_type_node
, t
,
6900 build_int_cst (TREE_TYPE (t
), 0));
6901 if (c
== boolean_true_node
)
6903 warning (0, "%<num_threads%> value must be positive");
6904 t
= integer_one_node
;
6907 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
, "num_threads");
6909 c
= build_omp_clause (OMP_CLAUSE_NUM_THREADS
);
6910 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
6911 OMP_CLAUSE_CHAIN (c
) = list
;
6922 c_parser_omp_clause_ordered (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
6926 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
, "ordered");
6928 c
= build_omp_clause (OMP_CLAUSE_ORDERED
);
6929 OMP_CLAUSE_CHAIN (c
) = list
;
6934 private ( variable-list ) */
6937 c_parser_omp_clause_private (c_parser
*parser
, tree list
)
6939 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_PRIVATE
, list
);
6943 reduction ( reduction-operator : variable-list )
6946 One of: + * - & ^ | && || */
6949 c_parser_omp_clause_reduction (c_parser
*parser
, tree list
)
6951 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6953 enum tree_code code
;
6955 switch (c_parser_peek_token (parser
)->type
)
6967 code
= BIT_AND_EXPR
;
6970 code
= BIT_XOR_EXPR
;
6973 code
= BIT_IOR_EXPR
;
6976 code
= TRUTH_ANDIF_EXPR
;
6979 code
= TRUTH_ORIF_EXPR
;
6982 c_parser_error (parser
,
6983 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
6984 "%<^%>, %<|%>, %<&&%>, or %<||%>");
6985 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
6988 c_parser_consume_token (parser
);
6989 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6993 nl
= c_parser_omp_variable_list (parser
, OMP_CLAUSE_REDUCTION
, list
);
6994 for (c
= nl
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
6995 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
6999 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7005 schedule ( schedule-kind )
7006 schedule ( schedule-kind , expression )
7009 static | dynamic | guided | runtime
7013 c_parser_omp_clause_schedule (c_parser
*parser
, tree list
)
7017 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7020 c
= build_omp_clause (OMP_CLAUSE_SCHEDULE
);
7022 if (c_parser_next_token_is (parser
, CPP_NAME
))
7024 tree kind
= c_parser_peek_token (parser
)->value
;
7025 const char *p
= IDENTIFIER_POINTER (kind
);
7030 if (strcmp ("dynamic", p
) != 0)
7032 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
7036 if (strcmp ("guided", p
) != 0)
7038 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
7042 if (strcmp ("runtime", p
) != 0)
7044 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
7051 else if (c_parser_next_token_is_keyword (parser
, RID_STATIC
))
7052 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
7056 c_parser_consume_token (parser
);
7057 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7059 c_parser_consume_token (parser
);
7061 t
= c_parser_expr_no_commas (parser
, NULL
).value
;
7063 if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
7064 error ("schedule %<runtime%> does not take "
7065 "a %<chunk_size%> parameter");
7066 else if (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
)
7067 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
7069 c_parser_error (parser
, "expected integer expression");
7071 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7074 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7075 "expected %<,%> or %<)%>");
7077 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule");
7078 OMP_CLAUSE_CHAIN (c
) = list
;
7082 c_parser_error (parser
, "invalid schedule kind");
7083 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7088 shared ( variable-list ) */
7091 c_parser_omp_clause_shared (c_parser
*parser
, tree list
)
7093 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_SHARED
, list
);
7096 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7097 is a bitmask in MASK. Return the list of clauses found; the result
7098 of clause default goes in *pdefault. */
7101 c_parser_omp_all_clauses (c_parser
*parser
, unsigned int mask
,
7104 tree clauses
= NULL
;
7106 while (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7108 const pragma_omp_clause c_kind
= c_parser_omp_clause_name (parser
);
7110 tree prev
= clauses
;
7114 case PRAGMA_OMP_CLAUSE_COPYIN
:
7115 clauses
= c_parser_omp_clause_copyin (parser
, clauses
);
7118 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
7119 clauses
= c_parser_omp_clause_copyprivate (parser
, clauses
);
7120 c_name
= "copyprivate";
7122 case PRAGMA_OMP_CLAUSE_DEFAULT
:
7123 clauses
= c_parser_omp_clause_default (parser
, clauses
);
7126 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
7127 clauses
= c_parser_omp_clause_firstprivate (parser
, clauses
);
7128 c_name
= "firstprivate";
7130 case PRAGMA_OMP_CLAUSE_IF
:
7131 clauses
= c_parser_omp_clause_if (parser
, clauses
);
7134 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
7135 clauses
= c_parser_omp_clause_lastprivate (parser
, clauses
);
7136 c_name
= "lastprivate";
7138 case PRAGMA_OMP_CLAUSE_NOWAIT
:
7139 clauses
= c_parser_omp_clause_nowait (parser
, clauses
);
7142 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
7143 clauses
= c_parser_omp_clause_num_threads (parser
, clauses
);
7144 c_name
= "num_threads";
7146 case PRAGMA_OMP_CLAUSE_ORDERED
:
7147 clauses
= c_parser_omp_clause_ordered (parser
, clauses
);
7150 case PRAGMA_OMP_CLAUSE_PRIVATE
:
7151 clauses
= c_parser_omp_clause_private (parser
, clauses
);
7154 case PRAGMA_OMP_CLAUSE_REDUCTION
:
7155 clauses
= c_parser_omp_clause_reduction (parser
, clauses
);
7156 c_name
= "reduction";
7158 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
7159 clauses
= c_parser_omp_clause_schedule (parser
, clauses
);
7160 c_name
= "schedule";
7162 case PRAGMA_OMP_CLAUSE_SHARED
:
7163 clauses
= c_parser_omp_clause_shared (parser
, clauses
);
7167 c_parser_error (parser
, "expected %<#pragma omp%> clause");
7171 if (((mask
>> c_kind
) & 1) == 0 && !parser
->error
)
7173 /* Remove the invalid clause(s) from the list to avoid
7174 confusing the rest of the compiler. */
7176 error ("%qs is not valid for %qs", c_name
, where
);
7181 c_parser_skip_to_pragma_eol (parser
);
7183 return c_finish_omp_clauses (clauses
);
7190 In practice, we're also interested in adding the statement to an
7191 outer node. So it is convenient if we work around the fact that
7192 c_parser_statement calls add_stmt. */
7195 c_parser_omp_structured_block (c_parser
*parser
)
7197 tree stmt
= push_stmt_list ();
7198 c_parser_statement (parser
);
7199 return pop_stmt_list (stmt
);
7203 # pragma omp atomic new-line
7207 x binop= expr | x++ | ++x | x-- | --x
7209 +, *, -, /, &, ^, |, <<, >>
7211 where x is an lvalue expression with scalar type. */
7214 c_parser_omp_atomic (c_parser
*parser
)
7217 enum tree_code code
;
7219 c_parser_skip_to_pragma_eol (parser
);
7221 lhs
= c_parser_unary_expression (parser
).value
;
7222 switch (TREE_CODE (lhs
))
7226 c_parser_skip_to_end_of_block_or_statement (parser
);
7229 case PREINCREMENT_EXPR
:
7230 case POSTINCREMENT_EXPR
:
7231 lhs
= TREE_OPERAND (lhs
, 0);
7233 rhs
= integer_one_node
;
7236 case PREDECREMENT_EXPR
:
7237 case POSTDECREMENT_EXPR
:
7238 lhs
= TREE_OPERAND (lhs
, 0);
7240 rhs
= integer_one_node
;
7244 switch (c_parser_peek_token (parser
)->type
)
7250 code
= TRUNC_DIV_EXPR
;
7265 code
= BIT_AND_EXPR
;
7268 code
= BIT_IOR_EXPR
;
7271 code
= BIT_XOR_EXPR
;
7274 c_parser_error (parser
,
7275 "invalid operator for %<#pragma omp atomic%>");
7279 c_parser_consume_token (parser
);
7280 rhs
= c_parser_expression (parser
).value
;
7283 c_finish_omp_atomic (code
, lhs
, rhs
);
7284 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7289 # pragma omp barrier new-line
7293 c_parser_omp_barrier (c_parser
*parser
)
7295 c_parser_consume_pragma (parser
);
7296 c_parser_skip_to_pragma_eol (parser
);
7298 c_finish_omp_barrier ();
7302 # pragma omp critical [(name)] new-line
7307 c_parser_omp_critical (c_parser
*parser
)
7309 tree stmt
, name
= NULL
;
7311 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7313 c_parser_consume_token (parser
);
7314 if (c_parser_next_token_is (parser
, CPP_NAME
))
7316 name
= c_parser_peek_token (parser
)->value
;
7317 c_parser_consume_token (parser
);
7318 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7321 c_parser_error (parser
, "expected identifier");
7323 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7324 c_parser_error (parser
, "expected %<(%> or end of line");
7325 c_parser_skip_to_pragma_eol (parser
);
7327 stmt
= c_parser_omp_structured_block (parser
);
7328 return c_finish_omp_critical (stmt
, name
);
7332 # pragma omp flush flush-vars[opt] new-line
7335 ( variable-list ) */
7338 c_parser_omp_flush (c_parser
*parser
)
7340 c_parser_consume_pragma (parser
);
7341 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7342 c_parser_omp_var_list_parens (parser
, 0, NULL
);
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 c_finish_omp_flush ();
7350 /* Parse the restricted form of the for statment allowed by OpenMP.
7351 The real trick here is to determine the loop control variable early
7352 so that we can push a new decl if necessary to make it private. */
7355 c_parser_omp_for_loop (c_parser
*parser
)
7357 tree decl
, cond
, incr
, save_break
, save_cont
, body
, init
;
7360 if (!c_parser_next_token_is_keyword (parser
, RID_FOR
))
7362 c_parser_error (parser
, "for statement expected");
7365 loc
= c_parser_peek_token (parser
)->location
;
7366 c_parser_consume_token (parser
);
7368 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7371 /* Parse the initialization declaration or expression. */
7372 if (c_parser_next_token_starts_declspecs (parser
))
7374 c_parser_declaration_or_fndef (parser
, true, true, true, true);
7375 decl
= check_for_loop_decls ();
7380 else if (c_parser_next_token_is (parser
, CPP_NAME
)
7381 && c_parser_peek_2nd_token (parser
)->type
== CPP_EQ
)
7383 decl
= c_parser_postfix_expression (parser
).value
;
7385 c_parser_require (parser
, CPP_EQ
, "expected %<=%>");
7387 init
= c_parser_expr_no_commas (parser
, NULL
).value
;
7388 init
= build_modify_expr (decl
, NOP_EXPR
, init
);
7389 init
= c_process_expr_stmt (init
);
7391 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7396 /* Parse the loop condition. */
7398 if (c_parser_next_token_is_not (parser
, CPP_SEMICOLON
))
7400 cond
= c_parser_expression_conv (parser
).value
;
7401 cond
= c_objc_common_truthvalue_conversion (cond
);
7403 SET_EXPR_LOCATION (cond
, input_location
);
7405 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7407 /* Parse the increment expression. */
7409 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_PAREN
))
7410 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
7411 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7414 save_break
= c_break_label
;
7415 c_break_label
= size_one_node
;
7416 save_cont
= c_cont_label
;
7417 c_cont_label
= NULL_TREE
;
7418 body
= push_stmt_list ();
7420 add_stmt (c_parser_c99_block_statement (parser
));
7422 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_cont_label
));
7424 body
= pop_stmt_list (body
);
7425 c_break_label
= save_break
;
7426 c_cont_label
= save_cont
;
7428 /* Only bother calling c_finish_omp_for if we havn't already generated
7429 an error from the initialization parsing. */
7430 if (decl
!= NULL
&& decl
!= error_mark_node
&& init
!= error_mark_node
)
7431 return c_finish_omp_for (loc
, decl
, init
, cond
, incr
, body
, NULL
);
7435 c_parser_error (parser
, "expected iteration declaration or initialization");
7436 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7437 decl
= init
= cond
= incr
= NULL_TREE
;
7442 #pragma omp for for-clause[optseq] new-line
7446 #define OMP_FOR_CLAUSE_MASK \
7447 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7448 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7449 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7450 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7451 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7452 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7453 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7456 c_parser_omp_for (c_parser
*parser
)
7458 tree block
, clauses
, ret
;
7460 clauses
= c_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
7463 block
= c_begin_compound_stmt (true);
7464 ret
= c_parser_omp_for_loop (parser
);
7466 OMP_FOR_CLAUSES (ret
) = clauses
;
7467 block
= c_end_compound_stmt (block
, true);
7474 # pragma omp master new-line
7479 c_parser_omp_master (c_parser
*parser
)
7481 c_parser_skip_to_pragma_eol (parser
);
7482 return c_finish_omp_master (c_parser_omp_structured_block (parser
));
7486 # pragma omp ordered new-line
7491 c_parser_omp_ordered (c_parser
*parser
)
7493 c_parser_skip_to_pragma_eol (parser
);
7494 return c_finish_omp_ordered (c_parser_omp_structured_block (parser
));
7500 { section-sequence }
7503 section-directive[opt] structured-block
7504 section-sequence section-directive structured-block */
7507 c_parser_omp_sections_scope (c_parser
*parser
)
7510 bool error_suppress
= false;
7513 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
7515 /* Avoid skipping until the end of the block. */
7516 parser
->error
= false;
7520 stmt
= push_stmt_list ();
7522 loc
= c_parser_peek_token (parser
)->location
;
7523 if (c_parser_peek_token (parser
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
7525 substmt
= push_stmt_list ();
7529 c_parser_statement (parser
);
7531 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
7533 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7535 if (c_parser_next_token_is (parser
, CPP_EOF
))
7539 substmt
= pop_stmt_list (substmt
);
7540 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
7541 SET_EXPR_LOCATION (substmt
, loc
);
7547 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7549 if (c_parser_next_token_is (parser
, CPP_EOF
))
7552 loc
= c_parser_peek_token (parser
)->location
;
7553 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
7555 c_parser_consume_pragma (parser
);
7556 c_parser_skip_to_pragma_eol (parser
);
7557 error_suppress
= false;
7559 else if (!error_suppress
)
7561 error ("expected %<#pragma omp section%> or %<}%>");
7562 error_suppress
= true;
7565 substmt
= c_parser_omp_structured_block (parser
);
7566 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
7567 SET_EXPR_LOCATION (substmt
, loc
);
7570 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
,
7571 "expected %<#pragma omp section%> or %<}%>");
7573 substmt
= pop_stmt_list (stmt
);
7575 stmt
= make_node (OMP_SECTIONS
);
7576 TREE_TYPE (stmt
) = void_type_node
;
7577 OMP_SECTIONS_BODY (stmt
) = substmt
;
7579 return add_stmt (stmt
);
7583 # pragma omp sections sections-clause[optseq] newline
7587 #define OMP_SECTIONS_CLAUSE_MASK \
7588 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7589 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7590 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7591 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7592 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7595 c_parser_omp_sections (c_parser
*parser
)
7597 tree block
, clauses
, ret
;
7599 clauses
= c_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
7600 "#pragma omp sections");
7602 block
= c_begin_compound_stmt (true);
7603 ret
= c_parser_omp_sections_scope (parser
);
7605 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
7606 block
= c_end_compound_stmt (block
, true);
7613 # pragma parallel parallel-clause new-line
7614 # pragma parallel for parallel-for-clause new-line
7615 # pragma parallel sections parallel-sections-clause new-line
7618 #define OMP_PARALLEL_CLAUSE_MASK \
7619 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
7620 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7621 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7622 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
7623 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
7624 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
7625 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7626 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
7629 c_parser_omp_parallel (c_parser
*parser
)
7631 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
7632 const char *p_name
= "#pragma omp parallel";
7633 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
7634 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
7636 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
7638 c_parser_consume_token (parser
);
7639 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
7640 p_name
= "#pragma omp parallel for";
7641 mask
|= OMP_FOR_CLAUSE_MASK
;
7642 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
7644 else if (c_parser_next_token_is (parser
, CPP_NAME
))
7646 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
7647 if (strcmp (p
, "sections") == 0)
7649 c_parser_consume_token (parser
);
7650 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
7651 p_name
= "#pragma omp parallel sections";
7652 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
7653 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
7657 clauses
= c_parser_omp_all_clauses (parser
, mask
, p_name
);
7661 case PRAGMA_OMP_PARALLEL
:
7662 block
= c_begin_omp_parallel ();
7663 c_parser_statement (parser
);
7664 stmt
= c_finish_omp_parallel (clauses
, block
);
7667 case PRAGMA_OMP_PARALLEL_FOR
:
7668 block
= c_begin_omp_parallel ();
7669 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
7670 stmt
= c_parser_omp_for_loop (parser
);
7672 OMP_FOR_CLAUSES (stmt
) = ws_clause
;
7673 stmt
= c_finish_omp_parallel (par_clause
, block
);
7674 OMP_PARALLEL_COMBINED (stmt
) = 1;
7677 case PRAGMA_OMP_PARALLEL_SECTIONS
:
7678 block
= c_begin_omp_parallel ();
7679 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
7680 stmt
= c_parser_omp_sections_scope (parser
);
7682 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
7683 stmt
= c_finish_omp_parallel (par_clause
, block
);
7684 OMP_PARALLEL_COMBINED (stmt
) = 1;
7695 # pragma omp single single-clause[optseq] new-line
7699 #define OMP_SINGLE_CLAUSE_MASK \
7700 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7701 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7702 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
7703 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7706 c_parser_omp_single (c_parser
*parser
)
7708 tree stmt
= make_node (OMP_SINGLE
);
7709 TREE_TYPE (stmt
) = void_type_node
;
7711 OMP_SINGLE_CLAUSES (stmt
)
7712 = c_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
7713 "#pragma omp single");
7714 OMP_SINGLE_BODY (stmt
) = c_parser_omp_structured_block (parser
);
7716 return add_stmt (stmt
);
7720 /* Main entry point to parsing most OpenMP pragmas. */
7723 c_parser_omp_construct (c_parser
*parser
)
7725 enum pragma_kind p_kind
;
7729 loc
= c_parser_peek_token (parser
)->location
;
7730 p_kind
= c_parser_peek_token (parser
)->pragma_kind
;
7731 c_parser_consume_pragma (parser
);
7735 case PRAGMA_OMP_ATOMIC
:
7736 c_parser_omp_atomic (parser
);
7738 case PRAGMA_OMP_CRITICAL
:
7739 stmt
= c_parser_omp_critical (parser
);
7741 case PRAGMA_OMP_FOR
:
7742 stmt
= c_parser_omp_for (parser
);
7744 case PRAGMA_OMP_MASTER
:
7745 stmt
= c_parser_omp_master (parser
);
7747 case PRAGMA_OMP_ORDERED
:
7748 stmt
= c_parser_omp_ordered (parser
);
7750 case PRAGMA_OMP_PARALLEL
:
7751 stmt
= c_parser_omp_parallel (parser
);
7753 case PRAGMA_OMP_SECTIONS
:
7754 stmt
= c_parser_omp_sections (parser
);
7756 case PRAGMA_OMP_SINGLE
:
7757 stmt
= c_parser_omp_single (parser
);
7764 SET_EXPR_LOCATION (stmt
, loc
);
7769 # pragma omp threadprivate (variable-list) */
7772 c_parser_omp_threadprivate (c_parser
*parser
)
7776 c_parser_consume_pragma (parser
);
7777 vars
= c_parser_omp_var_list_parens (parser
, 0, NULL
);
7779 if (!targetm
.have_tls
)
7780 sorry ("threadprivate variables not supported in this target");
7782 /* Mark every variable in VARS to be assigned thread local storage. */
7783 for (t
= vars
; t
; t
= TREE_CHAIN (t
))
7785 tree v
= TREE_PURPOSE (t
);
7787 /* If V had already been marked threadprivate, it doesn't matter
7788 whether it had been used prior to this point. */
7789 if (TREE_USED (v
) && !C_DECL_THREADPRIVATE_P (v
))
7790 error ("%qE declared %<threadprivate%> after first use", v
);
7791 else if (! TREE_STATIC (v
) && ! DECL_EXTERNAL (v
))
7792 error ("automatic variable %qE cannot be %<threadprivate%>", v
);
7793 else if (! COMPLETE_TYPE_P (TREE_TYPE (v
)))
7794 error ("%<threadprivate%> %qE has incomplete type", v
);
7797 if (! DECL_THREAD_LOCAL_P (v
))
7799 DECL_TLS_MODEL (v
) = decl_default_tls_model (v
);
7800 /* If rtl has been already set for this var, call
7801 make_decl_rtl once again, so that encode_section_info
7802 has a chance to look at the new decl flags. */
7803 if (DECL_RTL_SET_P (v
))
7806 C_DECL_THREADPRIVATE_P (v
) = 1;
7810 c_parser_skip_to_pragma_eol (parser
);
7814 /* Parse a single source file. */
7819 /* Use local storage to begin. If the first token is a pragma, parse it.
7820 If it is #pragma GCC pch_preprocess, then this will load a PCH file
7821 which will cause garbage collection. */
7824 memset (&tparser
, 0, sizeof tparser
);
7825 the_parser
= &tparser
;
7827 if (c_parser_peek_token (&tparser
)->pragma_kind
== PRAGMA_GCC_PCH_PREPROCESS
)
7828 c_parser_pragma_pch_preprocess (&tparser
);
7830 the_parser
= GGC_NEW (c_parser
);
7831 *the_parser
= tparser
;
7833 c_parser_translation_unit (the_parser
);
7837 #include "gt-c-parser.h"