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));
2151 struct c_expr expr = c_parser_expression (parser);
2154 if (TREE_CODE (expr.value) == COMPONENT_REF
2155 && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1)))
2156 error ("%<typeof%> applied to a bit-field");
2157 ret.spec = TREE_TYPE (expr.value);
2158 pop_maybe_used (variably_modified_type_p (ret.spec, NULL_TREE));
2160 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
2164 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2165 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2166 be redeclared; otherwise it may not. KIND indicates which kind of
2167 declarator is wanted. Returns a valid declarator except in the
2168 case of a syntax error in which case NULL is returned. *SEEN_ID is
2169 set to true if an identifier being declared is seen; this is used
2170 to diagnose bad forms of abstract array declarators and to
2171 determine whether an identifier list is syntactically permitted.
2174 pointer[opt] direct-declarator
2178 ( attributes[opt] declarator )
2179 direct-declarator array-declarator
2180 direct-declarator ( parameter-type-list )
2181 direct-declarator ( identifier-list[opt] )
2184 * type-qualifier-list[opt]
2185 * type-qualifier-list[opt] pointer
2187 type-qualifier-list:
2190 type-qualifier-list type-qualifier
2191 type-qualifier-list attributes
2193 parameter-type-list:
2195 parameter-list , ...
2198 parameter-declaration
2199 parameter-list , parameter-declaration
2201 parameter-declaration:
2202 declaration-specifiers declarator attributes[opt]
2203 declaration-specifiers abstract-declarator[opt] attributes[opt]
2207 identifier-list , identifier
2209 abstract-declarator:
2211 pointer[opt] direct-abstract-declarator
2213 direct-abstract-declarator:
2214 ( attributes[opt] abstract-declarator )
2215 direct-abstract-declarator[opt] array-declarator
2216 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2221 direct-declarator ( parameter-forward-declarations
2222 parameter-type-list[opt] )
2224 direct-abstract-declarator:
2225 direct-abstract-declarator[opt] ( parameter-forward-declarations
2226 parameter-type-list[opt] )
2228 parameter-forward-declarations:
2230 parameter-forward-declarations parameter-list ;
2232 The uses of attributes shown above are GNU extensions.
2234 Some forms of array declarator are not included in C99 in the
2235 syntax for abstract declarators; these are disallowed elsewhere.
2236 This may be a defect (DR#289).
2238 This function also accepts an omitted abstract declarator as being
2239 an abstract declarator, although not part of the formal syntax. */
2241 static struct c_declarator *
2242 c_parser_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind,
2245 /* Parse any initial pointer part. */
2246 if (c_parser_next_token_is (parser, CPP_MULT))
2248 struct c_declspecs *quals_attrs = build_null_declspecs ();
2249 struct c_declarator *inner;
2250 c_parser_consume_token (parser);
2251 c_parser_declspecs (parser, quals_attrs, false, false, true);
2252 inner = c_parser_declarator (parser, type_seen_p, kind, seen_id);
2256 return make_pointer_declarator (quals_attrs, inner);
2258 /* Now we have a direct declarator, direct abstract declarator or
2259 nothing (which counts as a direct abstract declarator here). */
2260 return c_parser_direct_declarator (parser, type_seen_p, kind, seen_id);
2263 /* Parse a direct declarator or direct abstract declarator; arguments
2264 as c_parser_declarator. */
2266 static struct c_declarator *
2267 c_parser_direct_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind,
2270 /* The direct declarator must start with an identifier (possibly
2271 omitted) or a parenthesized declarator (possibly abstract). In
2272 an ordinary declarator, initial parentheses must start a
2273 parenthesized declarator. In an abstract declarator or parameter
2274 declarator, they could start a parenthesized declarator or a
2275 parameter list. To tell which, the open parenthesis and any
2276 following attributes must be read. If a declaration specifier
2277 follows, then it is a parameter list; if the specifier is a
2278 typedef name, there might be an ambiguity about redeclaring it,
2279 which is resolved in the direction of treating it as a typedef
2280 name. If a close parenthesis follows, it is also an empty
2281 parameter list, as the syntax does not permit empty abstract
2282 declarators. Otherwise, it is a parenthesized declarator (in
2283 which case the analysis may be repeated inside it, recursively).
2285 ??? There is an ambiguity in a parameter declaration "int
2286 (__attribute__((foo)) x)", where x is not a typedef name: it
2287 could be an abstract declarator for a function, or declare x with
2288 parentheses. The proper resolution of this ambiguity needs
2289 documenting. At present we follow an accident of the old
2290 parser's implementation, whereby the first parameter must have
2291 some declaration specifiers other than just attributes. Thus as
2292 a parameter declaration it is treated as a parenthesized
2293 parameter named x, and as an abstract declarator it is
2296 ??? Also following the old parser, attributes inside an empty
2297 parameter list are ignored, making it a list not yielding a
2298 prototype, rather than giving an error or making it have one
2299 parameter with implicit type int.
2301 ??? Also following the old parser, typedef names may be
2302 redeclared in declarators, but not Objective-C class names. */
2304 if (kind != C_DTR_ABSTRACT
2305 && c_parser_next_token_is (parser, CPP_NAME)
2307 && c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME)
2308 || c_parser_peek_token (parser)->id_kind == C_ID_ID))
2310 struct c_declarator *inner
2311 = build_id_declarator (c_parser_peek_token (parser)->value);
2313 inner->id_loc = c_parser_peek_token (parser)->location;
2314 c_parser_consume_token (parser);
2315 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2318 if (kind != C_DTR_NORMAL
2319 && c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
2321 struct c_declarator *inner = build_id_declarator (NULL_TREE);
2322 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2325 /* Either we are at the end of an abstract declarator, or we have
2328 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
2331 struct c_declarator *inner;
2332 c_parser_consume_token (parser);
2333 attrs = c_parser_attributes (parser);
2334 if (kind != C_DTR_NORMAL
2335 && (c_parser_next_token_starts_declspecs (parser)
2336 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN)))
2338 struct c_arg_info *args
2339 = c_parser_parms_declarator (parser, kind == C_DTR_NORMAL,
2346 = build_function_declarator (args,
2347 build_id_declarator (NULL_TREE));
2348 return c_parser_direct_declarator_inner (parser, *seen_id,
2352 /* A parenthesized declarator. */
2353 inner = c_parser_declarator (parser, type_seen_p, kind, seen_id);
2354 if (inner != NULL && attrs != NULL)
2355 inner = build_attrs_declarator (attrs, inner);
2356 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2358 c_parser_consume_token (parser);
2362 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2366 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2373 if (kind == C_DTR_NORMAL)
2375 c_parser_error (parser, "expected identifier or %<(%>");
2379 return build_id_declarator (NULL_TREE);
2383 /* Parse part of a direct declarator or direct abstract declarator,
2384 given that some (in INNER) has already been parsed; ID_PRESENT is
2385 true if an identifier is present, false for an abstract
2388 static struct c_declarator *
2389 c_parser_direct_declarator_inner (c_parser *parser, bool id_present,
2390 struct c_declarator *inner)
2392 /* Parse a sequence of array declarators and parameter lists. */
2393 if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
2395 struct c_declarator *declarator;
2396 struct c_declspecs *quals_attrs = build_null_declspecs ();
2400 c_parser_consume_token (parser);
2401 c_parser_declspecs (parser, quals_attrs, false, false, true);
2402 static_seen = c_parser_next_token_is_keyword (parser, RID_STATIC);
2404 c_parser_consume_token (parser);
2405 if (static_seen && !quals_attrs->declspecs_seen_p)
2406 c_parser_declspecs (parser, quals_attrs, false, false, true);
2407 if (!quals_attrs->declspecs_seen_p)
2409 /* If "static" is present, there must be an array dimension.
2410 Otherwise, there may be a dimension, "*", or no
2415 dimen = c_parser_expr_no_commas (parser, NULL).value;
2419 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
2424 else if (c_parser_next_token_is (parser, CPP_MULT))
2426 if (c_parser_peek_2nd_token (parser)->type == CPP_CLOSE_SQUARE)
2430 c_parser_consume_token (parser);
2435 dimen = c_parser_expr_no_commas (parser, NULL).value;
2441 dimen = c_parser_expr_no_commas (parser, NULL).value;
2444 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
2445 c_parser_consume_token (parser);
2448 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
2452 declarator = build_array_declarator (dimen, quals_attrs, static_seen,
2454 inner = set_array_declarator_inner (declarator, inner, !id_present);
2455 return c_parser_direct_declarator_inner (parser, id_present, inner);
2457 else if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
2460 struct c_arg_info *args;
2461 c_parser_consume_token (parser);
2462 attrs = c_parser_attributes (parser);
2463 args = c_parser_parms_declarator (parser, id_present, attrs);
2468 inner = build_function_declarator (args, inner);
2469 return c_parser_direct_declarator_inner (parser, id_present, inner);
2475 /* Parse a parameter list or identifier list, including the closing
2476 parenthesis but not the opening one. ATTRS are the attributes at
2477 the start of the list. ID_LIST_OK is true if an identifier list is
2478 acceptable; such a list must not have attributes at the start. */
2480 static struct c_arg_info *
2481 c_parser_parms_declarator (c_parser *parser, bool id_list_ok, tree attrs)
2484 declare_parm_level ();
2485 /* If the list starts with an identifier, it is an identifier list.
2486 Otherwise, it is either a prototype list or an empty list. */
2489 && c_parser_next_token_is (parser, CPP_NAME)
2490 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
2492 tree list = NULL_TREE, *nextp = &list;
2493 while (c_parser_next_token_is (parser, CPP_NAME)
2494 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
2496 *nextp = build_tree_list (NULL_TREE,
2497 c_parser_peek_token (parser)->value);
2498 nextp = & TREE_CHAIN (*nextp);
2499 c_parser_consume_token (parser);
2500 if (c_parser_next_token_is_not (parser, CPP_COMMA))
2502 c_parser_consume_token (parser);
2503 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2505 c_parser_error (parser, "expected identifier");
2509 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2511 struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
2516 c_parser_consume_token (parser);
2522 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2530 struct c_arg_info *ret = c_parser_parms_list_declarator (parser, attrs);
2536 /* Parse a parameter list (possibly empty), including the closing
2537 parenthesis but not the opening one. ATTRS are the attributes at
2538 the start of the list. */
2540 static struct c_arg_info *
2541 c_parser_parms_list_declarator (c_parser *parser, tree attrs)
2543 bool good_parm = false;
2544 /* ??? Following the old parser, forward parameter declarations may
2545 use abstract declarators, and if no real parameter declarations
2546 follow the forward declarations then this is not diagnosed. Also
2547 note as above that attributes are ignored as the only contents of
2548 the parentheses, or as the only contents after forward
2550 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2552 struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
2557 c_parser_consume_token (parser);
2560 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
2562 struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
2566 /* Suppress -Wold-style-definition for this case. */
2567 ret->types = error_mark_node;
2568 error ("ISO C requires a named argument before %<...%>");
2569 c_parser_consume_token (parser);
2570 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2572 c_parser_consume_token (parser);
2577 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2582 /* Nonempty list of parameters, either terminated with semicolon
2583 (forward declarations; recurse) or with close parenthesis (normal
2584 function) or with ", ... )" (variadic function). */
2587 /* Parse a parameter. */
2588 struct c_parm *parm = c_parser_parameter_declaration (parser, attrs);
2593 push_parm_decl (parm);
2595 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
2598 c_parser_consume_token (parser);
2599 mark_forward_parm_decls ();
2600 new_attrs = c_parser_attributes (parser);
2601 return c_parser_parms_list_declarator (parser, new_attrs);
2603 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2605 c_parser_consume_token (parser);
2607 return get_parm_info (false);
2610 struct c_arg_info *ret
2611 = XOBNEW (&parser_obstack, struct c_arg_info);
2619 if (!c_parser_require (parser, CPP_COMMA,
2620 "expected %<;%>, %<,%> or %<)%>"))
2622 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
2625 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
2627 c_parser_consume_token (parser);
2628 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2630 c_parser_consume_token (parser);
2632 return get_parm_info (true);
2635 struct c_arg_info *ret
2636 = XOBNEW (&parser_obstack, struct c_arg_info);
2646 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2654 /* Parse a parameter declaration. ATTRS are the attributes at the
2655 start of the declaration if it is the first parameter. */
2657 static struct c_parm *
2658 c_parser_parameter_declaration (c_parser *parser, tree attrs)
2660 struct c_declspecs *specs;
2661 struct c_declarator *declarator;
2663 tree postfix_attrs = NULL_TREE;
2665 if (!c_parser_next_token_starts_declspecs (parser))
2667 /* ??? In some Objective-C cases '...' isn't applicable so there
2668 should be a different message. */
2669 c_parser_error (parser,
2670 "expected declaration specifiers or %<...%>");
2671 c_parser_skip_to_end_of_parameter (parser);
2674 specs = build_null_declspecs ();
2677 declspecs_add_attrs (specs, attrs);
2680 c_parser_declspecs (parser, specs, true, true, true);
2681 finish_declspecs (specs);
2682 pending_xref_error ();
2683 prefix_attrs = specs->attrs;
2684 specs->attrs = NULL_TREE;
2685 declarator = c_parser_declarator (parser, specs->type_seen_p,
2686 C_DTR_PARM, &dummy);
2687 if (declarator == NULL)
2689 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
2692 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2693 postfix_attrs = c_parser_attributes (parser);
2694 return build_c_parm (specs, chainon (postfix_attrs, prefix_attrs),
2698 /* Parse a string literal in an asm expression. It should not be
2699 translated, and wide string literals are an error although
2700 permitted by the syntax. This is a GNU extension.
2705 ??? At present, following the old parser, the caller needs to have
2706 set c_lex_string_translate to 0. It would be better to follow the
2707 C++ parser rather than using the c_lex_string_translate kludge. */
2710 c_parser_asm_string_literal (c_parser *parser)
2713 if (c_parser_next_token_is (parser, CPP_STRING))
2715 str = c_parser_peek_token (parser)->value;
2716 c_parser_consume_token (parser);
2718 else if (c_parser_next_token_is (parser, CPP_WSTRING))
2720 error ("wide string literal in %<asm%>");
2721 str = build_string (1, "");
2722 c_parser_consume_token (parser);
2726 c_parser_error (parser, "expected string literal");
2732 /* Parse a simple asm expression. This is used in restricted
2733 contexts, where a full expression with inputs and outputs does not
2734 make sense. This is a GNU extension.
2737 asm ( asm-string-literal )
2741 c_parser_simple_asm_expr (c_parser *parser)
2744 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM));
2745 /* ??? Follow the C++ parser rather than using the
2746 c_lex_string_translate kludge. */
2747 c_lex_string_translate = 0;
2748 c_parser_consume_token (parser);
2749 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2751 c_lex_string_translate = 1;
2754 str = c_parser_asm_string_literal (parser);
2755 c_lex_string_translate = 1;
2756 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
2758 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
2764 /* Parse (possibly empty) attributes. This is a GNU extension.
2768 attributes attribute
2771 __attribute__ ( ( attribute-list ) )
2775 attribute_list , attrib
2780 any-word ( identifier )
2781 any-word ( identifier , nonempty-expr-list )
2782 any-word ( expr-list )
2784 where the "identifier" must not be declared as a type, and
2785 "any-word" may be any identifier (including one declared as a
2786 type), a reserved word storage class specifier, type specifier or
2787 type qualifier. ??? This still leaves out most reserved keywords
2788 (following the old parser), shouldn't we include them, and why not
2789 allow identifiers declared as types to start the arguments? */
2792 c_parser_attributes (c_parser *parser)
2794 tree attrs = NULL_TREE;
2795 while (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2797 /* ??? Follow the C++ parser rather than using the
2798 c_lex_string_translate kludge. */
2799 c_lex_string_translate = 0;
2800 c_parser_consume_token (parser);
2801 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2803 c_lex_string_translate = 1;
2806 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2808 c_lex_string_translate = 1;
2809 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
2812 /* Parse the attribute list. */
2813 while (c_parser_next_token_is (parser, CPP_COMMA)
2814 || c_parser_next_token_is (parser, CPP_NAME)
2815 || c_parser_next_token_is (parser, CPP_KEYWORD))
2817 tree attr, attr_name, attr_args;
2818 if (c_parser_next_token_is (parser, CPP_COMMA))
2820 c_parser_consume_token (parser);
2823 if (c_parser_next_token_is (parser, CPP_KEYWORD))
2825 /* ??? See comment above about what keywords are
2828 switch (c_parser_peek_token (parser)->keyword)
2863 attr_name = c_parser_peek_token (parser)->value;
2864 c_parser_consume_token (parser);
2865 if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN))
2867 attr = build_tree_list (attr_name, NULL_TREE);
2868 attrs = chainon (attrs, attr);
2871 c_parser_consume_token (parser);
2872 /* Parse the attribute contents. If they start with an
2873 identifier which is followed by a comma or close
2874 parenthesis, then the arguments start with that
2875 identifier; otherwise they are an expression list. */
2876 if (c_parser_next_token_is (parser, CPP_NAME)
2877 && c_parser_peek_token (parser)->id_kind == C_ID_ID
2878 && ((c_parser_peek_2nd_token (parser)->type == CPP_COMMA)
2879 || (c_parser_peek_2nd_token (parser)->type
2880 == CPP_CLOSE_PAREN)))
2882 tree arg1 = c_parser_peek_token (parser)->value;
2883 c_parser_consume_token (parser);
2884 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2885 attr_args = build_tree_list (NULL_TREE, arg1);
2888 c_parser_consume_token (parser);
2889 attr_args = tree_cons (NULL_TREE, arg1,
2890 c_parser_expr_list (parser, false));
2895 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2896 attr_args = NULL_TREE;
2898 attr_args = c_parser_expr_list (parser, false);
2900 attr = build_tree_list (attr_name, attr_args);
2901 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2902 c_parser_consume_token (parser);
2905 c_lex_string_translate = 1;
2906 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2910 attrs = chainon (attrs, attr);
2912 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2913 c_parser_consume_token (parser);
2916 c_lex_string_translate = 1;
2917 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2921 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2922 c_parser_consume_token (parser);
2925 c_lex_string_translate = 1;
2926 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2930 c_lex_string_translate = 1;
2935 /* Parse a type name (C90 6.5.5, C99 6.7.6).
2938 specifier-qualifier-list abstract-declarator[opt]
2941 static struct c_type_name *
2942 c_parser_type_name (c_parser *parser)
2944 struct c_declspecs *specs = build_null_declspecs ();
2945 struct c_declarator *declarator;
2946 struct c_type_name *ret;
2948 c_parser_declspecs (parser, specs, false, true, true);
2949 if (!specs->declspecs_seen_p)
2951 c_parser_error (parser, "expected specifier-qualifier-list");
2954 pending_xref_error ();
2955 finish_declspecs (specs);
2956 declarator = c_parser_declarator (parser, specs->type_seen_p,
2957 C_DTR_ABSTRACT, &dummy);
2958 if (declarator == NULL)
2960 ret = XOBNEW (&parser_obstack, struct c_type_name);
2962 ret->declarator = declarator;
2966 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
2969 assignment-expression
2970 { initializer-list }
2971 { initializer-list , }
2974 designation[opt] initializer
2975 initializer-list , designation[opt] initializer
2982 designator-list designator
2989 [ constant-expression ]
3001 [ constant-expression ... constant-expression ]
3003 Any expression without commas is accepted in the syntax for the
3004 constant-expressions, with non-constant expressions rejected later.
3006 This function is only used for top-level initializers; for nested
3007 ones, see c_parser_initval. */
3009 static struct c_expr
3010 c_parser_initializer (c_parser *parser)
3012 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
3013 return c_parser_braced_init (parser, NULL_TREE, false);
3017 ret = c_parser_expr_no_commas (parser, NULL);
3018 if (TREE_CODE (ret.value) != STRING_CST
3019 && TREE_CODE (ret.value) != COMPOUND_LITERAL_EXPR)
3020 ret = default_function_array_conversion (ret);
3025 /* Parse a braced initializer list. TYPE is the type specified for a
3026 compound literal, and NULL_TREE for other initializers and for
3027 nested braced lists. NESTED_P is true for nested braced lists,
3028 false for the list of a compound literal or the list that is the
3029 top-level initializer in a declaration. */
3031 static struct c_expr
3032 c_parser_braced_init (c_parser *parser, tree type, bool nested_p)
3034 gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE));
3035 c_parser_consume_token (parser);
3037 push_init_level (0);
3039 really_start_incremental_init (type);
3040 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3043 pedwarn ("ISO C forbids empty initializer braces");
3047 /* Parse a non-empty initializer list, possibly with a trailing
3051 c_parser_initelt (parser);
3054 if (c_parser_next_token_is (parser, CPP_COMMA))
3055 c_parser_consume_token (parser);
3058 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3062 if (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE))
3065 ret.value = error_mark_node;
3066 ret.original_code = ERROR_MARK;
3067 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, "expected %<}%>");
3070 c_parser_consume_token (parser);
3071 return pop_init_level (0);
3074 /* Parse a nested initializer, including designators. */
3077 c_parser_initelt (c_parser *parser)
3079 /* Parse any designator or designator list. A single array
3080 designator may have the subsequent "=" omitted in GNU C, but a
3081 longer list or a structure member designator may not. */
3082 if (c_parser_next_token_is (parser, CPP_NAME)
3083 && c_parser_peek_2nd_token (parser)->type == CPP_COLON)
3085 /* Old-style structure member designator. */
3086 set_init_label (c_parser_peek_token (parser)->value);
3088 pedwarn ("obsolete use of designated initializer with %<:%>");
3089 c_parser_consume_token (parser);
3090 c_parser_consume_token (parser);
3094 /* des_seen is 0 if there have been no designators, 1 if there
3095 has been a single array designator and 2 otherwise. */
3097 while (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)
3098 || c_parser_next_token_is (parser, CPP_DOT))
3100 int des_prev = des_seen;
3103 if (c_parser_next_token_is (parser, CPP_DOT))
3106 c_parser_consume_token (parser);
3107 if (c_parser_next_token_is (parser, CPP_NAME))
3109 set_init_label (c_parser_peek_token (parser)->value);
3110 c_parser_consume_token (parser);
3115 init.value = error_mark_node;
3116 init.original_code = ERROR_MARK;
3117 c_parser_error (parser, "expected identifier");
3118 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
3119 process_init_element (init);
3126 /* ??? Following the old parser, [ objc-receiver
3127 objc-message-args ] is accepted as an initializer,
3128 being distinguished from a designator by what follows
3129 the first assignment expression inside the square
3130 brackets, but after a first array designator a
3131 subsequent square bracket is for Objective-C taken to
3132 start an expression, using the obsolete form of
3133 designated initializer without '=', rather than
3134 possibly being a second level of designation: in LALR
3135 terms, the '[' is shifted rather than reducing
3136 designator to designator-list. */
3137 if (des_prev == 1 && c_dialect_objc ())
3139 des_seen = des_prev;
3142 if (des_prev == 0 && c_dialect_objc ())
3144 /* This might be an array designator or an
3145 Objective-C message expression. If the former,
3146 continue parsing here; if the latter, parse the
3147 remainder of the initializer given the starting
3148 primary-expression. ??? It might make sense to
3149 distinguish when des_prev == 1 as well; see
3150 previous comment. */
3152 struct c_expr mexpr;
3153 c_parser_consume_token (parser);
3154 if (c_parser_peek_token (parser)->type == CPP_NAME
3155 && ((c_parser_peek_token (parser)->id_kind
3157 || (c_parser_peek_token (parser)->id_kind
3158 == C_ID_CLASSNAME)))
3160 /* Type name receiver. */
3161 tree id = c_parser_peek_token (parser)->value;
3162 c_parser_consume_token (parser);
3163 rec = objc_get_class_reference (id);
3164 goto parse_message_args;
3166 first = c_parser_expr_no_commas (parser, NULL).value;
3167 if (c_parser_next_token_is (parser, CPP_ELLIPSIS)
3168 || c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
3169 goto array_desig_after_first;
3170 /* Expression receiver. So far only one part
3171 without commas has been parsed; there might be
3172 more of the expression. */
3174 while (c_parser_next_token_is (parser, CPP_COMMA))
3177 c_parser_consume_token (parser);
3178 next = c_parser_expr_no_commas (parser, NULL);
3179 next = default_function_array_conversion (next);
3180 rec = build_compound_expr (rec, next.value);
3183 /* Now parse the objc-message-args. */
3184 args = c_parser_objc_message_args (parser);
3185 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
3188 = objc_build_message_expr (build_tree_list (rec, args));
3189 mexpr.original_code = ERROR_MARK;
3190 /* Now parse and process the remainder of the
3191 initializer, starting with this message
3192 expression as a primary-expression. */
3193 c_parser_initval (parser, &mexpr);
3196 c_parser_consume_token (parser);
3197 first = c_parser_expr_no_commas (parser, NULL).value;
3198 array_desig_after_first:
3199 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
3201 c_parser_consume_token (parser);
3202 second = c_parser_expr_no_commas (parser, NULL).value;
3206 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
3208 c_parser_consume_token (parser);
3209 set_init_index (first, second);
3210 if (pedantic && second)
3211 pedwarn ("ISO C forbids specifying range of "
3212 "elements to initialize");
3215 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
3221 if (c_parser_next_token_is (parser, CPP_EQ))
3223 if (pedantic && !flag_isoc99)
3224 pedwarn ("ISO C90 forbids specifying subobject to initialize");
3225 c_parser_consume_token (parser);
3232 pedwarn ("obsolete use of designated initializer "
3238 init.value = error_mark_node;
3239 init.original_code = ERROR_MARK;
3240 c_parser_error (parser, "expected %<=%>");
3241 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
3242 process_init_element (init);
3248 c_parser_initval (parser, NULL);
3251 /* Parse a nested initializer; as c_parser_initializer but parses
3252 initializers within braced lists, after any designators have been
3253 applied. If AFTER is not NULL then it is an Objective-C message
3254 expression which is the primary-expression starting the
3258 c_parser_initval (c_parser *parser, struct c_expr *after)
3261 gcc_assert (!after || c_dialect_objc ());
3262 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE) && !after)
3263 init = c_parser_braced_init (parser, NULL_TREE, true);
3266 init = c_parser_expr_no_commas (parser, after);
3267 if (init.value != NULL_TREE
3268 && TREE_CODE (init.value) != STRING_CST
3269 && TREE_CODE (init.value) != COMPOUND_LITERAL_EXPR)
3270 init = default_function_array_conversion (init);
3272 process_init_element (init);
3275 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3279 { block-item-list[opt] }
3280 { label-declarations block-item-list }
3284 block-item-list block-item
3296 { label-declarations block-item-list }
3299 __extension__ nested-declaration
3300 nested-function-definition
3304 label-declarations label-declaration
3307 __label__ identifier-list ;
3309 Allowing the mixing of declarations and code is new in C99. The
3310 GNU syntax also permits (not shown above) labels at the end of
3311 compound statements, which yield an error. We don't allow labels
3312 on declarations; this might seem like a natural extension, but
3313 there would be a conflict between attributes on the label and
3314 prefix attributes on the declaration. ??? The syntax follows the
3315 old parser in requiring something after label declarations.
3316 Although they are erroneous if the labels declared aren't defined,
3317 is it useful for the syntax to be this way?
3329 c_parser_compound_statement (c_parser *parser)
3332 if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
3333 return error_mark_node;
3334 stmt = c_begin_compound_stmt (true);
3335 c_parser_compound_statement_nostart (parser);
3336 return c_end_compound_stmt (stmt, true);
3339 /* Parse a compound statement except for the opening brace. This is
3340 used for parsing both compound statements and statement expressions
3341 (which follow different paths to handling the opening). */
3344 c_parser_compound_statement_nostart (c_parser *parser)
3346 bool last_stmt = false;
3347 bool last_label = false;
3348 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3350 c_parser_consume_token (parser);
3353 if (c_parser_next_token_is_keyword (parser, RID_LABEL))
3355 /* Read zero or more forward-declarations for labels that nested
3356 functions can jump to. */
3357 while (c_parser_next_token_is_keyword (parser, RID_LABEL))
3359 c_parser_consume_token (parser);
3360 /* Any identifiers, including those declared as type names,
3365 if (c_parser_next_token_is_not (parser, CPP_NAME))
3367 c_parser_error (parser, "expected identifier");
3371 = declare_label (c_parser_peek_token (parser)->value);
3372 C_DECLARED_LABEL_FLAG (label) = 1;
3373 add_stmt (build_stmt (DECL_EXPR, label));
3374 c_parser_consume_token (parser);
3375 if (c_parser_next_token_is (parser, CPP_COMMA))
3376 c_parser_consume_token (parser);
3380 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
3382 /* ??? Locating this diagnostic on the token after the
3383 declarations end follows the old parser, but it might be
3384 better to locate it where the declarations start instead. */
3386 pedwarn ("ISO C forbids label declarations");
3388 /* We must now have at least one statement, label or declaration. */
3389 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3391 c_parser_error (parser, "expected declaration or statement");
3392 c_parser_consume_token (parser);
3395 while (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE))
3397 location_t loc = c_parser_peek_token (parser)->location;
3398 if (c_parser_next_token_is_keyword (parser, RID_CASE)
3399 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3400 || (c_parser_next_token_is (parser, CPP_NAME)
3401 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3405 c_parser_label (parser);
3407 else if (!last_label
3408 && c_parser_next_token_starts_declspecs (parser))
3411 c_parser_declaration_or_fndef (parser, true, true, true, true);
3413 && ((pedantic && !flag_isoc99)
3414 || warn_declaration_after_statement))
3415 pedwarn_c90 ("%HISO C90 forbids mixed declarations and code",
3419 else if (!last_label
3420 && c_parser_next_token_is_keyword (parser, RID_EXTENSION))
3422 /* __extension__ can start a declaration, but is also an
3423 unary operator that can start an expression. Consume all
3424 but the last of a possible series of __extension__ to
3426 while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD
3427 && (c_parser_peek_2nd_token (parser)->keyword
3429 c_parser_consume_token (parser);
3430 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser)))
3433 ext = disable_extension_diagnostics ();
3434 c_parser_consume_token (parser);
3436 c_parser_declaration_or_fndef (parser, true, true, true, true);
3437 /* Following the old parser, __extension__ does not
3438 disable this diagnostic. */
3439 restore_extension_diagnostics (ext);
3441 && ((pedantic && !flag_isoc99)
3442 || warn_declaration_after_statement))
3443 pedwarn_c90 ("%HISO C90 forbids mixed declarations and code",
3450 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
3452 /* External pragmas, and some omp pragmas, are not associated
3453 with regular c code, and so are not to be considered statements
3454 syntactically. This ensures that the user doesn't put them
3455 places that would turn into syntax errors if the directive
3457 if (c_parser_pragma (parser, pragma_compound))
3458 last_label = false, last_stmt = true;
3460 else if (c_parser_next_token_is (parser, CPP_EOF))
3462 c_parser_error (parser, "expected declaration or statement");
3470 c_parser_statement_after_labels (parser);
3474 error ("label at end of compound statement");
3475 c_parser_consume_token (parser);
3478 /* Parse a label (C90 6.6.1, C99 6.8.1).
3481 identifier : attributes[opt]
3482 case constant-expression :
3488 case constant-expression ... constant-expression :
3490 The use of attributes on labels is a GNU extension. The syntax in
3491 GNU C accepts any expressions without commas, non-constant
3492 expressions being rejected later. */
3495 c_parser_label (c_parser *parser)
3497 location_t loc1 = c_parser_peek_token (parser)->location;
3498 tree label = NULL_TREE;
3499 if (c_parser_next_token_is_keyword (parser, RID_CASE))
3502 c_parser_consume_token (parser);
3503 exp1 = c_parser_expr_no_commas (parser, NULL).value;
3504 if (c_parser_next_token_is (parser, CPP_COLON))
3506 c_parser_consume_token (parser);
3507 label = do_case (exp1, NULL_TREE);
3509 else if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
3511 c_parser_consume_token (parser);
3512 exp2 = c_parser_expr_no_commas (parser, NULL).value;
3513 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
3514 label = do_case (exp1, exp2);
3517 c_parser_error (parser, "expected %<:%> or %<...%>");
3519 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
3521 c_parser_consume_token (parser);
3522 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
3523 label = do_case (NULL_TREE, NULL_TREE);
3527 tree name = c_parser_peek_token (parser)->value;
3531 gcc_assert (c_parser_next_token_is (parser, CPP_NAME));
3532 c_parser_consume_token (parser);
3533 gcc_assert (c_parser_next_token_is (parser, CPP_COLON));
3534 loc2 = c_parser_peek_token (parser)->location;
3535 c_parser_consume_token (parser);
3536 attrs = c_parser_attributes (parser);
3537 tlab = define_label (loc2, name);
3540 decl_attributes (&tlab, attrs, 0);
3541 label = add_stmt (build_stmt (LABEL_EXPR, tlab));
3545 SET_EXPR_LOCATION (label, loc1);
3548 /* Parse a statement (C90 6.6, C99 6.8).
3553 expression-statement
3561 expression-statement:
3564 selection-statement:
3568 iteration-statement:
3577 return expression[opt] ;
3590 objc-throw-statement
3591 objc-try-catch-statement
3592 objc-synchronized-statement
3594 objc-throw-statement:
3608 parallel-for-construct
3609 parallel-sections-construct
3616 parallel-directive structured-block
3619 for-directive iteration-statement
3622 sections-directive section-scope
3625 single-directive structured-block
3627 parallel-for-construct:
3628 parallel-for-directive iteration-statement
3630 parallel-sections-construct:
3631 parallel-sections-directive section-scope
3634 master-directive structured-block
3637 critical-directive structured-block
3640 atomic-directive expression-statement
3643 ordered-directive structured-block */
3646 c_parser_statement (c_parser *parser)
3648 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3649 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3650 || (c_parser_next_token_is (parser, CPP_NAME)
3651 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3652 c_parser_label (parser);
3653 c_parser_statement_after_labels (parser);
3656 /* Parse a statement, other than a labeled statement. */
3659 c_parser_statement_after_labels (c_parser *parser)
3661 location_t loc = c_parser_peek_token (parser)->location;
3662 tree stmt = NULL_TREE;
3663 switch (c_parser_peek_token (parser)->type)
3665 case CPP_OPEN_BRACE:
3666 add_stmt (c_parser_compound_statement (parser));
3669 switch (c_parser_peek_token (parser)->keyword)
3672 c_parser_if_statement (parser);
3675 c_parser_switch_statement (parser);
3678 c_parser_while_statement (parser);
3681 c_parser_do_statement (parser);
3684 c_parser_for_statement (parser);
3687 c_parser_consume_token (parser);
3688 if (c_parser_next_token_is (parser, CPP_NAME))
3690 stmt = c_finish_goto_label (c_parser_peek_token (parser)->value);
3691 c_parser_consume_token (parser);
3693 else if (c_parser_next_token_is (parser, CPP_MULT))
3695 c_parser_consume_token (parser);
3696 stmt = c_finish_goto_ptr (c_parser_expression (parser).value);
3699 c_parser_error (parser, "expected identifier or %<*%>");
3700 goto expect_semicolon;
3702 c_parser_consume_token (parser);
3703 stmt = c_finish_bc_stmt (&c_cont_label, false);
3704 goto expect_semicolon;
3706 c_parser_consume_token (parser);
3707 stmt = c_finish_bc_stmt (&c_break_label, true);
3708 goto expect_semicolon;
3710 c_parser_consume_token (parser);
3711 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3713 stmt = c_finish_return (NULL_TREE);
3714 c_parser_consume_token (parser);
3718 stmt = c_finish_return (c_parser_expression_conv (parser).value);
3719 goto expect_semicolon;
3723 stmt = c_parser_asm_statement (parser);
3726 gcc_assert (c_dialect_objc ());
3727 c_parser_consume_token (parser);
3728 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3730 stmt = objc_build_throw_stmt (NULL_TREE);
3731 c_parser_consume_token (parser);
3736 = objc_build_throw_stmt (c_parser_expression (parser).value);
3737 goto expect_semicolon;
3741 gcc_assert (c_dialect_objc ());
3742 c_parser_objc_try_catch_statement (parser);
3744 case RID_AT_SYNCHRONIZED:
3745 gcc_assert (c_dialect_objc ());
3746 c_parser_objc_synchronized_statement (parser);
3753 c_parser_consume_token (parser);
3755 case CPP_CLOSE_PAREN:
3756 case CPP_CLOSE_SQUARE:
3757 /* Avoid infinite loop in error recovery:
3758 c_parser_skip_until_found stops at a closing nesting
3759 delimiter without consuming it, but here we need to consume
3760 it to proceed further. */
3761 c_parser_error (parser, "expected statement");
3762 c_parser_consume_token (parser);
3765 c_parser_pragma (parser, pragma_stmt);
3769 stmt = c_finish_expr_stmt (c_parser_expression_conv (parser).value);
3771 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
3774 /* Two cases cannot and do not have line numbers associated: If stmt
3775 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3776 cannot hold line numbers. But that's OK because the statement
3777 will either be changed to a MODIFY_EXPR during gimplification of
3778 the statement expr, or discarded. If stmt was compound, but
3779 without new variables, we will have skipped the creation of a
3780 BIND and will have a bare STATEMENT_LIST. But that's OK because
3781 (recursively) all of the component statements should already have
3782 line numbers assigned. ??? Can we discard no-op statements
3784 if (stmt && EXPR_P (stmt))
3785 SET_EXPR_LOCATION (stmt, loc);
3788 /* Parse a parenthesized condition from an if, do or while statement.
3794 c_parser_paren_condition (c_parser *parser)
3798 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3799 return error_mark_node;
3800 loc = c_parser_peek_token (parser)->location;
3801 cond = c_objc_common_truthvalue_conversion
3802 (c_parser_expression_conv (parser).value);
3804 SET_EXPR_LOCATION (cond, loc);
3805 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
3809 /* Parse a statement which is a block in C99. */
3812 c_parser_c99_block_statement (c_parser *parser)
3814 tree block = c_begin_compound_stmt (flag_isoc99);
3815 c_parser_statement (parser);
3816 return c_end_compound_stmt (block, flag_isoc99);
3819 /* Parse the body of an if statement or the else half thereof. This
3820 is just parsing a statement but (a) it is a block in C99, (b) we
3821 track whether the body is an if statement for the sake of
3822 -Wparentheses warnings, (c) we handle an empty body specially for
3823 the sake of -Wextra warnings. */
3826 c_parser_if_body (c_parser *parser, bool *if_p)
3828 tree block = c_begin_compound_stmt (flag_isoc99);
3829 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3830 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3831 || (c_parser_next_token_is (parser, CPP_NAME)
3832 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3833 c_parser_label (parser);
3834 *if_p = c_parser_next_token_is_keyword (parser, RID_IF);
3835 if (extra_warnings && c_parser_next_token_is (parser, CPP_SEMICOLON))
3836 add_stmt (build_empty_stmt ());
3837 c_parser_statement_after_labels (parser);
3838 return c_end_compound_stmt (block, flag_isoc99);
3841 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3844 if ( expression ) statement
3845 if ( expression ) statement else statement
3849 c_parser_if_statement (c_parser *parser)
3854 bool first_if = false, second_if = false;
3855 tree first_body, second_body;
3856 gcc_assert (c_parser_next_token_is_keyword (parser, RID_IF));
3857 c_parser_consume_token (parser);
3858 block = c_begin_compound_stmt (flag_isoc99);
3859 loc = c_parser_peek_token (parser)->location;
3860 cond = c_parser_paren_condition (parser);
3861 first_body = c_parser_if_body (parser, &first_if);
3862 if (c_parser_next_token_is_keyword (parser, RID_ELSE))
3864 c_parser_consume_token (parser);
3865 second_body = c_parser_if_body (parser, &second_if);
3868 second_body = NULL_TREE;
3869 c_finish_if_stmt (loc, cond, first_body, second_body, first_if);
3870 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3873 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3876 switch (expression) statement
3880 c_parser_switch_statement (c_parser *parser)
3882 tree block, expr, body, save_break;
3883 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SWITCH));
3884 c_parser_consume_token (parser);
3885 block = c_begin_compound_stmt (flag_isoc99);
3886 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3888 expr = c_parser_expression (parser).value;
3889 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
3892 expr = error_mark_node;
3893 c_start_case (expr);
3894 save_break = c_break_label;
3895 c_break_label = NULL_TREE;
3896 body = c_parser_c99_block_statement (parser);
3897 c_finish_case (body);
3899 add_stmt (build1 (LABEL_EXPR, void_type_node, c_break_label));
3900 c_break_label = save_break;
3901 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3904 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
3907 while (expression) statement
3911 c_parser_while_statement (c_parser *parser)
3913 tree block, cond, body, save_break, save_cont;
3915 gcc_assert (c_parser_next_token_is_keyword (parser, RID_WHILE));
3916 c_parser_consume_token (parser);
3917 block = c_begin_compound_stmt (flag_isoc99);
3918 loc = c_parser_peek_token (parser)->location;
3919 cond = c_parser_paren_condition (parser);
3920 save_break = c_break_label;
3921 c_break_label = NULL_TREE;
3922 save_cont = c_cont_label;
3923 c_cont_label = NULL_TREE;
3924 body = c_parser_c99_block_statement (parser);
3925 c_finish_loop (loc, cond, NULL, body, c_break_label, c_cont_label, true);
3926 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3927 c_break_label = save_break;
3928 c_cont_label = save_cont;
3931 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
3934 do statement while ( expression ) ;
3938 c_parser_do_statement (c_parser *parser)
3940 tree block, cond, body, save_break, save_cont, new_break, new_cont;
3942 gcc_assert (c_parser_next_token_is_keyword (parser, RID_DO));
3943 c_parser_consume_token (parser);
3944 block = c_begin_compound_stmt (flag_isoc99);
3945 loc = c_parser_peek_token (parser)->location;
3946 save_break = c_break_label;
3947 c_break_label = NULL_TREE;
3948 save_cont = c_cont_label;
3949 c_cont_label = NULL_TREE;
3950 body = c_parser_c99_block_statement (parser);
3951 c_parser_require_keyword (parser, RID_WHILE, "expected %<while%>");
3952 new_break = c_break_label;
3953 c_break_label = save_break;
3954 new_cont = c_cont_label;
3955 c_cont_label = save_cont;
3956 cond = c_parser_paren_condition (parser);
3957 if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
3958 c_parser_skip_to_end_of_block_or_statement (parser);
3959 c_finish_loop (loc, cond, NULL, body, new_break, new_cont, false);
3960 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3963 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
3966 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
3967 for ( nested-declaration expression[opt] ; expression[opt] ) statement
3969 The form with a declaration is new in C99.
3971 ??? In accordance with the old parser, the declaration may be a
3972 nested function, which is then rejected in check_for_loop_decls,
3973 but does it make any sense for this to be included in the grammar?
3974 Note in particular that the nested function does not include a
3975 trailing ';', whereas the "declaration" production includes one.
3976 Also, can we reject bad declarations earlier and cheaper than
3977 check_for_loop_decls? */
3980 c_parser_for_statement (c_parser *parser)
3982 tree block, cond, incr, save_break, save_cont, body;
3984 gcc_assert (c_parser_next_token_is_keyword (parser, RID_FOR));
3985 loc = c_parser_peek_token (parser)->location;
3986 c_parser_consume_token (parser);
3987 block = c_begin_compound_stmt (flag_isoc99);
3988 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3990 /* Parse the initialization declaration or expression. */
3991 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3993 c_parser_consume_token (parser);
3994 c_finish_expr_stmt (NULL_TREE);
3996 else if (c_parser_next_token_starts_declspecs (parser))
3998 c_parser_declaration_or_fndef (parser, true, true, true, true);
3999 check_for_loop_decls ();
4001 else if (c_parser_next_token_is_keyword (parser, RID_EXTENSION))
4003 /* __extension__ can start a declaration, but is also an
4004 unary operator that can start an expression. Consume all
4005 but the last of a possible series of __extension__ to
4007 while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD
4008 && (c_parser_peek_2nd_token (parser)->keyword
4010 c_parser_consume_token (parser);
4011 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser)))
4014 ext = disable_extension_diagnostics ();
4015 c_parser_consume_token (parser);
4016 c_parser_declaration_or_fndef (parser, true, true, true, true);
4017 restore_extension_diagnostics (ext);
4018 check_for_loop_decls ();
4026 c_finish_expr_stmt (c_parser_expression (parser).value);
4027 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4029 /* Parse the loop condition. */
4030 loc = c_parser_peek_token (parser)->location;
4031 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4033 c_parser_consume_token (parser);
4038 tree ocond = c_parser_expression_conv (parser).value;
4039 cond = c_objc_common_truthvalue_conversion (ocond);
4041 SET_EXPR_LOCATION (cond, loc);
4042 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4044 /* Parse the increment expression. */
4045 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4046 incr = c_process_expr_stmt (NULL_TREE);
4048 incr = c_process_expr_stmt (c_parser_expression (parser).value);
4049 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4053 cond = error_mark_node;
4054 incr = error_mark_node;
4056 save_break = c_break_label;
4057 c_break_label = NULL_TREE;
4058 save_cont = c_cont_label;
4059 c_cont_label = NULL_TREE;
4060 body = c_parser_c99_block_statement (parser);
4061 c_finish_loop (loc, cond, incr, body, c_break_label, c_cont_label, true);
4062 add_stmt (c_end_compound_stmt (block, flag_isoc99));
4063 c_break_label = save_break;
4064 c_cont_label = save_cont;
4067 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4068 statement with inputs, outputs, clobbers, and volatile tag
4072 asm type-qualifier[opt] ( asm-argument ) ;
4076 asm-string-literal : asm-operands[opt]
4077 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4078 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4080 Qualifiers other than volatile are accepted in the syntax but
4084 c_parser_asm_statement (c_parser *parser)
4086 tree quals, str, outputs, inputs, clobbers, ret;
4088 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM));
4089 c_parser_consume_token (parser);
4090 if (c_parser_next_token_is_keyword (parser, RID_VOLATILE))
4092 quals = c_parser_peek_token (parser)->value;
4093 c_parser_consume_token (parser);
4095 else if (c_parser_next_token_is_keyword (parser, RID_CONST)
4096 || c_parser_next_token_is_keyword (parser, RID_RESTRICT))
4098 warning (0, "%E qualifier ignored on asm",
4099 c_parser_peek_token (parser)->value);
4101 c_parser_consume_token (parser);
4105 /* ??? Follow the C++ parser rather than using the
4106 c_lex_string_translate kludge. */
4107 c_lex_string_translate = 0;
4108 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4110 c_lex_string_translate = 1;
4113 str = c_parser_asm_string_literal (parser);
4114 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4117 outputs = NULL_TREE;
4119 clobbers = NULL_TREE;
4122 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4124 c_lex_string_translate = 1;
4125 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4129 /* Parse outputs. */
4130 if (c_parser_next_token_is (parser, CPP_COLON)
4131 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4132 outputs = NULL_TREE;
4134 outputs = c_parser_asm_operands (parser, false);
4135 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4138 clobbers = NULL_TREE;
4141 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4143 c_lex_string_translate = 1;
4144 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4148 if (c_parser_next_token_is (parser, CPP_COLON)
4149 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4152 inputs = c_parser_asm_operands (parser, true);
4153 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4155 clobbers = NULL_TREE;
4158 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4160 c_lex_string_translate = 1;
4161 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4164 /* Parse clobbers. */
4165 clobbers = c_parser_asm_clobbers (parser);
4167 c_lex_string_translate = 1;
4168 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
4170 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4173 if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
4174 c_parser_skip_to_end_of_block_or_statement (parser);
4175 ret = build_asm_stmt (quals, build_asm_expr (str, outputs, inputs,
4180 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4181 not outputs), apply the default conversion of functions and arrays
4186 asm-operands , asm-operand
4189 asm-string-literal ( expression )
4190 [ identifier ] asm-string-literal ( expression )
4194 c_parser_asm_operands (c_parser *parser, bool convert_p)
4196 tree list = NULL_TREE;
4201 if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
4203 c_parser_consume_token (parser);
4204 if (c_parser_next_token_is (parser, CPP_NAME))
4206 tree id = c_parser_peek_token (parser)->value;
4207 c_parser_consume_token (parser);
4208 name = build_string (IDENTIFIER_LENGTH (id),
4209 IDENTIFIER_POINTER (id));
4213 c_parser_error (parser, "expected identifier");
4214 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, NULL);
4217 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
4222 str = c_parser_asm_string_literal (parser);
4223 if (str == NULL_TREE)
4225 c_lex_string_translate = 1;
4226 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4228 c_lex_string_translate = 0;
4231 expr = c_parser_expression (parser);
4233 expr = default_function_array_conversion (expr);
4234 c_lex_string_translate = 0;
4235 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
4237 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4240 list = chainon (list, build_tree_list (build_tree_list (name, str),
4242 if (c_parser_next_token_is (parser, CPP_COMMA))
4243 c_parser_consume_token (parser);
4250 /* Parse asm clobbers, a GNU extension.
4254 asm-clobbers , asm-string-literal
4258 c_parser_asm_clobbers (c_parser *parser)
4260 tree list = NULL_TREE;
4263 tree str = c_parser_asm_string_literal (parser);
4265 list = tree_cons (NULL_TREE, str, list);
4268 if (c_parser_next_token_is (parser, CPP_COMMA))
4269 c_parser_consume_token (parser);
4276 /* Parse an expression other than a compound expression; that is, an
4277 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4278 NULL then it is an Objective-C message expression which is the
4279 primary-expression starting the expression as an initializer.
4281 assignment-expression:
4282 conditional-expression
4283 unary-expression assignment-operator assignment-expression
4285 assignment-operator: one of
4286 = *= /= %= += -= <<= >>= &= ^= |=
4288 In GNU C we accept any conditional expression on the LHS and
4289 diagnose the invalid lvalue rather than producing a syntax
4292 static struct c_expr
4293 c_parser_expr_no_commas (c_parser *parser, struct c_expr *after)
4295 struct c_expr lhs, rhs, ret;
4296 enum tree_code code;
4297 gcc_assert (!after || c_dialect_objc ());
4298 lhs = c_parser_conditional_expression (parser, after);
4299 switch (c_parser_peek_token (parser)->type)
4308 code = TRUNC_DIV_EXPR;
4311 code = TRUNC_MOD_EXPR;
4326 code = BIT_AND_EXPR;
4329 code = BIT_XOR_EXPR;
4332 code = BIT_IOR_EXPR;
4337 c_parser_consume_token (parser);
4338 rhs = c_parser_expr_no_commas (parser, NULL);
4339 rhs = default_function_array_conversion (rhs);
4340 ret.value = build_modify_expr (lhs.value, code, rhs.value);
4341 if (code == NOP_EXPR)
4342 ret.original_code = MODIFY_EXPR;
4345 TREE_NO_WARNING (ret.value) = 1;
4346 ret.original_code = ERROR_MARK;
4351 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4352 is not NULL then it is an Objective-C message expression which is
4353 the primary-expression starting the expression as an initializer.
4355 conditional-expression:
4356 logical-OR-expression
4357 logical-OR-expression ? expression : conditional-expression
4361 conditional-expression:
4362 logical-OR-expression ? : conditional-expression
4365 static struct c_expr
4366 c_parser_conditional_expression (c_parser *parser, struct c_expr *after)
4368 struct c_expr cond, exp1, exp2, ret;
4369 gcc_assert (!after || c_dialect_objc ());
4370 cond = c_parser_binary_expression (parser, after);
4371 if (c_parser_next_token_is_not (parser, CPP_QUERY))
4373 cond = default_function_array_conversion (cond);
4374 c_parser_consume_token (parser);
4375 if (c_parser_next_token_is (parser, CPP_COLON))
4378 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
4379 /* Make sure first operand is calculated only once. */
4380 exp1.value = save_expr (default_conversion (cond.value));
4381 cond.value = c_objc_common_truthvalue_conversion (exp1.value);
4382 skip_evaluation += cond.value == truthvalue_true_node;
4387 = c_objc_common_truthvalue_conversion
4388 (default_conversion (cond.value));
4389 skip_evaluation += cond.value == truthvalue_false_node;
4390 exp1 = c_parser_expression_conv (parser);
4391 skip_evaluation += ((cond.value == truthvalue_true_node)
4392 - (cond.value == truthvalue_false_node));
4394 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
4396 skip_evaluation -= cond.value == truthvalue_true_node;
4397 ret.value = error_mark_node;
4398 ret.original_code = ERROR_MARK;
4401 exp2 = c_parser_conditional_expression (parser, NULL);
4402 exp2 = default_function_array_conversion (exp2);
4403 skip_evaluation -= cond.value == truthvalue_true_node;
4404 ret.value = build_conditional_expr (cond.value, exp1.value, exp2.value);
4405 ret.original_code = ERROR_MARK;
4409 /* Parse a binary expression; that is, a logical-OR-expression (C90
4410 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4411 an Objective-C message expression which is the primary-expression
4412 starting the expression as an initializer.
4414 multiplicative-expression:
4416 multiplicative-expression * cast-expression
4417 multiplicative-expression / cast-expression
4418 multiplicative-expression % cast-expression
4420 additive-expression:
4421 multiplicative-expression
4422 additive-expression + multiplicative-expression
4423 additive-expression - multiplicative-expression
4427 shift-expression << additive-expression
4428 shift-expression >> additive-expression
4430 relational-expression:
4432 relational-expression < shift-expression
4433 relational-expression > shift-expression
4434 relational-expression <= shift-expression
4435 relational-expression >= shift-expression
4437 equality-expression:
4438 relational-expression
4439 equality-expression == relational-expression
4440 equality-expression != relational-expression
4444 AND-expression & equality-expression
4446 exclusive-OR-expression:
4448 exclusive-OR-expression ^ AND-expression
4450 inclusive-OR-expression:
4451 exclusive-OR-expression
4452 inclusive-OR-expression | exclusive-OR-expression
4454 logical-AND-expression:
4455 inclusive-OR-expression
4456 logical-AND-expression && inclusive-OR-expression
4458 logical-OR-expression:
4459 logical-AND-expression
4460 logical-OR-expression || logical-AND-expression
4463 static struct c_expr
4464 c_parser_binary_expression (c_parser *parser, struct c_expr *after)
4466 /* A binary expression is parsed using operator-precedence parsing,
4467 with the operands being cast expressions. All the binary
4468 operators are left-associative. Thus a binary expression is of
4471 E0 op1 E1 op2 E2 ...
4473 which we represent on a stack. On the stack, the precedence
4474 levels are strictly increasing. When a new operator is
4475 encountered of higher precedence than that at the top of the
4476 stack, it is pushed; its LHS is the top expression, and its RHS
4477 is everything parsed until it is popped. When a new operator is
4478 encountered with precedence less than or equal to that at the top
4479 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4480 by the result of the operation until the operator at the top of
4481 the stack has lower precedence than the new operator or there is
4482 only one element on the stack; then the top expression is the LHS
4483 of the new operator. In the case of logical AND and OR
4484 expressions, we also need to adjust skip_evaluation as
4485 appropriate when the operators are pushed and popped. */
4487 /* The precedence levels, where 0 is a dummy lowest level used for
4488 the bottom of the stack. */
4504 /* The expression at this stack level. */
4506 /* The precedence of the operator on its left, PREC_NONE at the
4507 bottom of the stack. */
4509 /* The operation on its left. */
4515 switch (stack[sp].op) \
4517 case TRUTH_ANDIF_EXPR: \
4518 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4520 case TRUTH_ORIF_EXPR: \
4521 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4526 stack[sp - 1].expr \
4527 = default_function_array_conversion (stack[sp - 1].expr); \
4529 = default_function_array_conversion (stack[sp].expr); \
4530 stack[sp - 1].expr = parser_build_binary_op (stack[sp].op, \
4531 stack[sp - 1].expr, \
4535 gcc_assert (!after || c_dialect_objc ());
4536 stack[0].expr = c_parser_cast_expression (parser, after);
4537 stack[0].prec = PREC_NONE;
4542 enum tree_code ocode;
4545 switch (c_parser_peek_token (parser)->type)
4553 ocode = TRUNC_DIV_EXPR;
4557 ocode = TRUNC_MOD_EXPR;
4569 ocode = LSHIFT_EXPR;
4573 ocode = RSHIFT_EXPR;
4587 case CPP_GREATER_EQ:
4600 oprec = PREC_BITAND;
4601 ocode = BIT_AND_EXPR;
4604 oprec = PREC_BITXOR;
4605 ocode = BIT_XOR_EXPR;
4609 ocode = BIT_IOR_EXPR;
4612 oprec = PREC_LOGAND;
4613 ocode = TRUTH_ANDIF_EXPR;
4617 ocode = TRUTH_ORIF_EXPR;
4620 /* Not a binary operator, so end of the binary
4624 c_parser_consume_token (parser);
4625 while (oprec <= stack[sp].prec)
4629 case TRUTH_ANDIF_EXPR:
4631 = default_function_array_conversion (stack[sp].expr);
4632 stack[sp].expr.value = c_objc_common_truthvalue_conversion
4633 (default_conversion (stack[sp].expr.value));
4634 skip_evaluation += stack[sp].expr.value == truthvalue_false_node;
4636 case TRUTH_ORIF_EXPR:
4638 = default_function_array_conversion (stack[sp].expr);
4639 stack[sp].expr.value = c_objc_common_truthvalue_conversion
4640 (default_conversion (stack[sp].expr.value));
4641 skip_evaluation += stack[sp].expr.value == truthvalue_true_node;
4647 stack[sp].expr = c_parser_cast_expression (parser, NULL);
4648 stack[sp].prec = oprec;
4649 stack[sp].op = ocode;
4654 return stack[0].expr;
4658 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4659 NULL then it is an Objective-C message expression which is the
4660 primary-expression starting the expression as an initializer.
4664 ( type-name ) unary-expression
4667 static struct c_expr
4668 c_parser_cast_expression (c_parser *parser, struct c_expr *after)
4670 gcc_assert (!after || c_dialect_objc ());
4672 return c_parser_postfix_expression_after_primary (parser, *after);
4673 /* If the expression begins with a parenthesized type name, it may
4674 be either a cast or a compound literal; we need to see whether
4675 the next character is '{' to tell the difference. If not, it is
4676 an unary expression. */
4677 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4678 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4680 struct c_type_name *type_name;
4683 c_parser_consume_token (parser);
4684 type_name = c_parser_type_name (parser);
4685 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4686 if (type_name == NULL)
4688 ret.value = error_mark_node;
4689 ret.original_code = ERROR_MARK;
4693 /* Save casted types in the function's used types hash table. */
4694 used_types_insert (type_name->specs->type);
4696 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4697 return c_parser_postfix_expression_after_paren_type (parser,
4699 expr = c_parser_cast_expression (parser, NULL);
4700 expr = default_function_array_conversion (expr);
4701 ret.value = c_cast_expr (type_name, expr.value);
4702 ret.original_code = ERROR_MARK;
4706 return c_parser_unary_expression (parser);
4709 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4715 unary-operator cast-expression
4716 sizeof unary-expression
4717 sizeof ( type-name )
4719 unary-operator: one of
4725 __alignof__ unary-expression
4726 __alignof__ ( type-name )
4729 unary-operator: one of
4730 __extension__ __real__ __imag__
4732 In addition, the GNU syntax treats ++ and -- as unary operators, so
4733 they may be applied to cast expressions with errors for non-lvalues
4736 static struct c_expr
4737 c_parser_unary_expression (c_parser *parser)
4740 struct c_expr ret, op;
4741 switch (c_parser_peek_token (parser)->type)
4744 c_parser_consume_token (parser);
4745 op = c_parser_cast_expression (parser, NULL);
4746 op = default_function_array_conversion (op);
4747 return parser_build_unary_op (PREINCREMENT_EXPR, op);
4748 case CPP_MINUS_MINUS:
4749 c_parser_consume_token (parser);
4750 op = c_parser_cast_expression (parser, NULL);
4751 op = default_function_array_conversion (op);
4752 return parser_build_unary_op (PREDECREMENT_EXPR, op);
4754 c_parser_consume_token (parser);
4755 return parser_build_unary_op (ADDR_EXPR,
4756 c_parser_cast_expression (parser, NULL));
4758 c_parser_consume_token (parser);
4759 op = c_parser_cast_expression (parser, NULL);
4760 op = default_function_array_conversion (op);
4761 ret.value = build_indirect_ref (op.value, "unary *");
4762 ret.original_code = ERROR_MARK;
4765 c_parser_consume_token (parser);
4766 if (!c_dialect_objc () && !in_system_header)
4767 warning (OPT_Wtraditional,
4768 "traditional C rejects the unary plus operator");
4769 op = c_parser_cast_expression (parser, NULL);
4770 op = default_function_array_conversion (op);
4771 return parser_build_unary_op (CONVERT_EXPR, op);
4773 c_parser_consume_token (parser);
4774 op = c_parser_cast_expression (parser, NULL);
4775 op = default_function_array_conversion (op);
4776 return parser_build_unary_op (NEGATE_EXPR, op);
4778 c_parser_consume_token (parser);
4779 op = c_parser_cast_expression (parser, NULL);
4780 op = default_function_array_conversion (op);
4781 return parser_build_unary_op (BIT_NOT_EXPR, op);
4783 c_parser_consume_token (parser);
4784 op = c_parser_cast_expression (parser, NULL);
4785 op = default_function_array_conversion (op);
4786 return parser_build_unary_op (TRUTH_NOT_EXPR, op);
4788 /* Refer to the address of a label as a pointer. */
4789 c_parser_consume_token (parser);
4790 if (c_parser_next_token_is (parser, CPP_NAME))
4792 ret.value = finish_label_address_expr
4793 (c_parser_peek_token (parser)->value);
4794 c_parser_consume_token (parser);
4798 c_parser_error (parser, "expected identifier");
4799 ret.value = error_mark_node;
4801 ret.original_code = ERROR_MARK;
4804 switch (c_parser_peek_token (parser)->keyword)
4807 return c_parser_sizeof_expression (parser);
4809 return c_parser_alignof_expression (parser);
4811 c_parser_consume_token (parser);
4812 ext = disable_extension_diagnostics ();
4813 ret = c_parser_cast_expression (parser, NULL);
4814 restore_extension_diagnostics (ext);
4817 c_parser_consume_token (parser);
4818 op = c_parser_cast_expression (parser, NULL);
4819 op = default_function_array_conversion (op);
4820 return parser_build_unary_op (REALPART_EXPR, op);
4822 c_parser_consume_token (parser);
4823 op = c_parser_cast_expression (parser, NULL);
4824 op = default_function_array_conversion (op);
4825 return parser_build_unary_op (IMAGPART_EXPR, op);
4827 return c_parser_postfix_expression (parser);
4830 return c_parser_postfix_expression (parser);
4834 /* Parse a sizeof expression. */
4836 static struct c_expr
4837 c_parser_sizeof_expression (c_parser *parser)
4840 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SIZEOF));
4841 c_parser_consume_token (parser);
4844 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4845 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4847 /* Either sizeof ( type-name ) or sizeof unary-expression
4848 starting with a compound literal. */
4849 struct c_type_name *type_name;
4850 c_parser_consume_token (parser);
4851 type_name = c_parser_type_name (parser);
4852 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4853 if (type_name == NULL)
4858 ret.value = error_mark_node;
4859 ret.original_code = ERROR_MARK;
4862 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4864 expr = c_parser_postfix_expression_after_paren_type (parser,
4868 /* sizeof ( type-name ). */
4871 return c_expr_sizeof_type (type_name);
4875 expr = c_parser_unary_expression (parser);
4879 if (TREE_CODE (expr.value) == COMPONENT_REF
4880 && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1)))
4881 error ("%<sizeof%> applied to a bit-field");
4882 return c_expr_sizeof_expr (expr);
4886 /* Parse an alignof expression. */
4888 static struct c_expr
4889 c_parser_alignof_expression (c_parser *parser)
4892 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF));
4893 c_parser_consume_token (parser);
4896 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4897 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4899 /* Either __alignof__ ( type-name ) or __alignof__
4900 unary-expression starting with a compound literal. */
4901 struct c_type_name *type_name;
4903 c_parser_consume_token (parser);
4904 type_name = c_parser_type_name (parser);
4905 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4906 if (type_name == NULL)
4911 ret.value = error_mark_node;
4912 ret.original_code = ERROR_MARK;
4915 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4917 expr = c_parser_postfix_expression_after_paren_type (parser,
4921 /* alignof ( type-name ). */
4924 ret.value = c_alignof (groktypename (type_name));
4925 ret.original_code = ERROR_MARK;
4931 expr = c_parser_unary_expression (parser);
4935 ret.value = c_alignof_expr (expr.value);
4936 ret.original_code = ERROR_MARK;
4941 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
4945 postfix-expression [ expression ]
4946 postfix-expression ( argument-expression-list[opt] )
4947 postfix-expression . identifier
4948 postfix-expression -> identifier
4949 postfix-expression ++
4950 postfix-expression --
4951 ( type-name ) { initializer-list }
4952 ( type-name ) { initializer-list , }
4954 argument-expression-list:
4956 argument-expression-list , argument-expression
4968 (treated as a keyword in GNU C)
4971 ( compound-statement )
4972 __builtin_va_arg ( assignment-expression , type-name )
4973 __builtin_offsetof ( type-name , offsetof-member-designator )
4974 __builtin_choose_expr ( assignment-expression ,
4975 assignment-expression ,
4976 assignment-expression )
4977 __builtin_types_compatible_p ( type-name , type-name )
4979 offsetof-member-designator:
4981 offsetof-member-designator . identifier
4982 offsetof-member-designator [ expression ]
4987 [ objc-receiver objc-message-args ]
4988 @selector ( objc-selector-arg )
4989 @protocol ( identifier )
4990 @encode ( type-name )
4994 static struct c_expr
4995 c_parser_postfix_expression (c_parser *parser)
4997 struct c_expr expr, e1, e2, e3;
4998 struct c_type_name *t1, *t2;
4999 switch (c_parser_peek_token (parser)->type)
5004 expr.value = c_parser_peek_token (parser)->value;
5005 expr.original_code = ERROR_MARK;
5006 c_parser_consume_token (parser);
5010 expr.value = c_parser_peek_token (parser)->value;
5011 expr.original_code = STRING_CST;
5012 c_parser_consume_token (parser);
5014 case CPP_OBJC_STRING:
5015 gcc_assert (c_dialect_objc ());
5017 = objc_build_string_object (c_parser_peek_token (parser)->value);
5018 expr.original_code = ERROR_MARK;
5019 c_parser_consume_token (parser);
5022 if (c_parser_peek_token (parser)->id_kind != C_ID_ID)
5024 c_parser_error (parser, "expected expression");
5025 expr.value = error_mark_node;
5026 expr.original_code = ERROR_MARK;
5030 tree id = c_parser_peek_token (parser)->value;
5031 location_t loc = c_parser_peek_token (parser)->location;
5032 c_parser_consume_token (parser);
5033 expr.value = build_external_ref (id,
5034 (c_parser_peek_token (parser)->type
5035 == CPP_OPEN_PAREN), loc);
5036 expr.original_code = ERROR_MARK;
5039 case CPP_OPEN_PAREN:
5040 /* A parenthesized expression, statement expression or compound
5042 if (c_parser_peek_2nd_token (parser)->type == CPP_OPEN_BRACE)
5044 /* A statement expression. */
5046 c_parser_consume_token (parser);
5047 c_parser_consume_token (parser);
5048 if (cur_stmt_list == NULL)
5050 error ("braced-group within expression allowed "
5051 "only inside a function");
5052 parser->error = true;
5053 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
5054 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5055 expr.value = error_mark_node;
5056 expr.original_code = ERROR_MARK;
5059 stmt = c_begin_stmt_expr ();
5060 c_parser_compound_statement_nostart (parser);
5061 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5064 pedwarn ("ISO C forbids braced-groups within expressions");
5065 expr.value = c_finish_stmt_expr (stmt);
5066 expr.original_code = ERROR_MARK;
5068 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser)))
5070 /* A compound literal. ??? Can we actually get here rather
5071 than going directly to
5072 c_parser_postfix_expression_after_paren_type from
5074 struct c_type_name *type_name;
5075 c_parser_consume_token (parser);
5076 type_name = c_parser_type_name (parser);
5077 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5079 if (type_name == NULL)
5081 expr.value = error_mark_node;
5082 expr.original_code = ERROR_MARK;
5085 expr = c_parser_postfix_expression_after_paren_type (parser,
5090 /* A parenthesized expression. */
5091 c_parser_consume_token (parser);
5092 expr = c_parser_expression (parser);
5093 if (TREE_CODE (expr.value) == MODIFY_EXPR)
5094 TREE_NO_WARNING (expr.value) = 1;
5095 expr.original_code = ERROR_MARK;
5096 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5101 switch (c_parser_peek_token (parser)->keyword)
5103 case RID_FUNCTION_NAME:
5104 case RID_PRETTY_FUNCTION_NAME:
5105 case RID_C99_FUNCTION_NAME:
5106 expr.value = fname_decl (c_parser_peek_token (parser)->keyword,
5107 c_parser_peek_token (parser)->value);
5108 expr.original_code = ERROR_MARK;
5109 c_parser_consume_token (parser);
5112 c_parser_consume_token (parser);
5113 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5115 expr.value = error_mark_node;
5116 expr.original_code = ERROR_MARK;
5119 e1 = c_parser_expr_no_commas (parser, NULL);
5120 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5122 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5123 expr.value = error_mark_node;
5124 expr.original_code = ERROR_MARK;
5127 t1 = c_parser_type_name (parser);
5128 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5132 expr.value = error_mark_node;
5133 expr.original_code = ERROR_MARK;
5137 expr.value = build_va_arg (e1.value, groktypename (t1));
5138 expr.original_code = ERROR_MARK;
5142 c_parser_consume_token (parser);
5143 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5145 expr.value = error_mark_node;
5146 expr.original_code = ERROR_MARK;
5149 t1 = c_parser_type_name (parser);
5152 expr.value = error_mark_node;
5153 expr.original_code = ERROR_MARK;
5156 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5158 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5159 expr.value = error_mark_node;
5160 expr.original_code = ERROR_MARK;
5164 tree type = groktypename (t1);
5166 if (type == error_mark_node)
5167 offsetof_ref = error_mark_node;
5169 offsetof_ref = build1 (INDIRECT_REF, type, NULL);
5170 /* Parse the second argument to __builtin_offsetof. We
5171 must have one identifier, and beyond that we want to
5172 accept sub structure and sub array references. */
5173 if (c_parser_next_token_is (parser, CPP_NAME))
5175 offsetof_ref = build_component_ref
5176 (offsetof_ref, c_parser_peek_token (parser)->value);
5177 c_parser_consume_token (parser);
5178 while (c_parser_next_token_is (parser, CPP_DOT)
5179 || c_parser_next_token_is (parser,
5182 if (c_parser_next_token_is (parser, CPP_DOT))
5184 c_parser_consume_token (parser);
5185 if (c_parser_next_token_is_not (parser,
5188 c_parser_error (parser, "expected identifier");
5191 offsetof_ref = build_component_ref
5193 c_parser_peek_token (parser)->value);
5194 c_parser_consume_token (parser);
5199 c_parser_consume_token (parser);
5200 idx = c_parser_expression (parser).value;
5201 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5203 offsetof_ref = build_array_ref (offsetof_ref, idx);
5208 c_parser_error (parser, "expected identifier");
5209 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5211 expr.value = fold_offsetof (offsetof_ref);
5212 expr.original_code = ERROR_MARK;
5215 case RID_CHOOSE_EXPR:
5216 c_parser_consume_token (parser);
5217 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5219 expr.value = error_mark_node;
5220 expr.original_code = ERROR_MARK;
5223 e1 = c_parser_expr_no_commas (parser, NULL);
5224 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5226 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5227 expr.value = error_mark_node;
5228 expr.original_code = ERROR_MARK;
5231 e2 = c_parser_expr_no_commas (parser, NULL);
5232 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5234 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5235 expr.value = error_mark_node;
5236 expr.original_code = ERROR_MARK;
5239 e3 = c_parser_expr_no_commas (parser, NULL);
5240 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5245 c = fold (e1.value);
5246 if (TREE_CODE (c) != INTEGER_CST)
5247 error ("first argument to %<__builtin_choose_expr%> not"
5249 expr = integer_zerop (c) ? e3 : e2;
5252 case RID_TYPES_COMPATIBLE_P:
5253 c_parser_consume_token (parser);
5254 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5256 expr.value = error_mark_node;
5257 expr.original_code = ERROR_MARK;
5260 t1 = c_parser_type_name (parser);
5263 expr.value = error_mark_node;
5264 expr.original_code = ERROR_MARK;
5267 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5269 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5270 expr.value = error_mark_node;
5271 expr.original_code = ERROR_MARK;
5274 t2 = c_parser_type_name (parser);
5277 expr.value = error_mark_node;
5278 expr.original_code = ERROR_MARK;
5281 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5286 e1 = TYPE_MAIN_VARIANT (groktypename (t1));
5287 e2 = TYPE_MAIN_VARIANT (groktypename (t2));
5289 expr.value = comptypes (e1, e2)
5290 ? build_int_cst (NULL_TREE, 1)
5291 : build_int_cst (NULL_TREE, 0);
5292 expr.original_code = ERROR_MARK;
5295 case RID_AT_SELECTOR:
5296 gcc_assert (c_dialect_objc ());
5297 c_parser_consume_token (parser);
5298 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5300 expr.value = error_mark_node;
5301 expr.original_code = ERROR_MARK;
5305 tree sel = c_parser_objc_selector_arg (parser);
5306 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5308 expr.value = objc_build_selector_expr (sel);
5309 expr.original_code = ERROR_MARK;
5312 case RID_AT_PROTOCOL:
5313 gcc_assert (c_dialect_objc ());
5314 c_parser_consume_token (parser);
5315 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5317 expr.value = error_mark_node;
5318 expr.original_code = ERROR_MARK;
5321 if (c_parser_next_token_is_not (parser, CPP_NAME))
5323 c_parser_error (parser, "expected identifier");
5324 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5325 expr.value = error_mark_node;
5326 expr.original_code = ERROR_MARK;
5330 tree id = c_parser_peek_token (parser)->value;
5331 c_parser_consume_token (parser);
5332 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5334 expr.value = objc_build_protocol_expr (id);
5335 expr.original_code = ERROR_MARK;
5339 /* Extension to support C-structures in the archiver. */
5340 gcc_assert (c_dialect_objc ());
5341 c_parser_consume_token (parser);
5342 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5344 expr.value = error_mark_node;
5345 expr.original_code = ERROR_MARK;
5348 t1 = c_parser_type_name (parser);
5351 expr.value = error_mark_node;
5352 expr.original_code = ERROR_MARK;
5353 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5356 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5359 tree type = groktypename (t1);
5360 expr.value = objc_build_encode_expr (type);
5361 expr.original_code = ERROR_MARK;
5365 c_parser_error (parser, "expected expression");
5366 expr.value = error_mark_node;
5367 expr.original_code = ERROR_MARK;
5371 case CPP_OPEN_SQUARE:
5372 if (c_dialect_objc ())
5374 tree receiver, args;
5375 c_parser_consume_token (parser);
5376 receiver = c_parser_objc_receiver (parser);
5377 args = c_parser_objc_message_args (parser);
5378 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5380 expr.value = objc_build_message_expr (build_tree_list (receiver,
5382 expr.original_code = ERROR_MARK;
5385 /* Else fall through to report error. */
5387 c_parser_error (parser, "expected expression");
5388 expr.value = error_mark_node;
5389 expr.original_code = ERROR_MARK;
5392 return c_parser_postfix_expression_after_primary (parser, expr);
5395 /* Parse a postfix expression after a parenthesized type name: the
5396 brace-enclosed initializer of a compound literal, possibly followed
5397 by some postfix operators. This is separate because it is not
5398 possible to tell until after the type name whether a cast
5399 expression has a cast or a compound literal, or whether the operand
5400 of sizeof is a parenthesized type name or starts with a compound
5403 static struct c_expr
5404 c_parser_postfix_expression_after_paren_type (c_parser *parser,
5405 struct c_type_name *type_name)
5410 start_init (NULL_TREE, NULL, 0);
5411 type = groktypename (type_name);
5412 if (C_TYPE_VARIABLE_SIZE (type))
5414 error ("compound literal has variable size");
5415 type = error_mark_node;
5417 init = c_parser_braced_init (parser, type, false);
5419 maybe_warn_string_init (type, init);
5421 if (pedantic && !flag_isoc99)
5422 pedwarn ("ISO C90 forbids compound literals");
5423 expr.value = build_compound_literal (type, init.value);
5424 expr.original_code = ERROR_MARK;
5425 return c_parser_postfix_expression_after_primary (parser, expr);
5428 /* Parse a postfix expression after the initial primary or compound
5429 literal; that is, parse a series of postfix operators. */
5431 static struct c_expr
5432 c_parser_postfix_expression_after_primary (c_parser *parser,
5435 tree ident, idx, exprlist;
5438 switch (c_parser_peek_token (parser)->type)
5440 case CPP_OPEN_SQUARE:
5441 /* Array reference. */
5442 c_parser_consume_token (parser);
5443 idx = c_parser_expression (parser).value;
5444 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5446 expr.value = build_array_ref (expr.value, idx);
5447 expr.original_code = ERROR_MARK;
5449 case CPP_OPEN_PAREN:
5450 /* Function call. */
5451 c_parser_consume_token (parser);
5452 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
5453 exprlist = NULL_TREE;
5455 exprlist = c_parser_expr_list (parser, true);
5456 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5458 expr.value = build_function_call (expr.value, exprlist);
5459 expr.original_code = ERROR_MARK;
5462 /* Structure element reference. */
5463 c_parser_consume_token (parser);
5464 expr = default_function_array_conversion (expr);
5465 if (c_parser_next_token_is (parser, CPP_NAME))
5466 ident = c_parser_peek_token (parser)->value;
5469 c_parser_error (parser, "expected identifier");
5470 expr.value = error_mark_node;
5471 expr.original_code = ERROR_MARK;
5474 c_parser_consume_token (parser);
5475 expr.value = build_component_ref (expr.value, ident);
5476 expr.original_code = ERROR_MARK;
5479 /* Structure element reference. */
5480 c_parser_consume_token (parser);
5481 expr = default_function_array_conversion (expr);
5482 if (c_parser_next_token_is (parser, CPP_NAME))
5483 ident = c_parser_peek_token (parser)->value;
5486 c_parser_error (parser, "expected identifier");
5487 expr.value = error_mark_node;
5488 expr.original_code = ERROR_MARK;
5491 c_parser_consume_token (parser);
5492 expr.value = build_component_ref (build_indirect_ref (expr.value,
5494 expr.original_code = ERROR_MARK;
5497 /* Postincrement. */
5498 c_parser_consume_token (parser);
5499 expr = default_function_array_conversion (expr);
5500 expr.value = build_unary_op (POSTINCREMENT_EXPR, expr.value, 0);
5501 expr.original_code = ERROR_MARK;
5503 case CPP_MINUS_MINUS:
5504 /* Postdecrement. */
5505 c_parser_consume_token (parser);
5506 expr = default_function_array_conversion (expr);
5507 expr.value = build_unary_op (POSTDECREMENT_EXPR, expr.value, 0);
5508 expr.original_code = ERROR_MARK;
5516 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5519 assignment-expression
5520 expression , assignment-expression
5523 static struct c_expr
5524 c_parser_expression (c_parser *parser)
5527 expr = c_parser_expr_no_commas (parser, NULL);
5528 while (c_parser_next_token_is (parser, CPP_COMMA))
5531 c_parser_consume_token (parser);
5532 next = c_parser_expr_no_commas (parser, NULL);
5533 next = default_function_array_conversion (next);
5534 expr.value = build_compound_expr (expr.value, next.value);
5535 expr.original_code = COMPOUND_EXPR;
5540 /* Parse an expression and convert functions or arrays to
5543 static struct c_expr
5544 c_parser_expression_conv (c_parser *parser)
5547 expr = c_parser_expression (parser);
5548 expr = default_function_array_conversion (expr);
5552 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5553 functions and arrays to pointers.
5556 assignment-expression
5557 nonempty-expr-list , assignment-expression
5561 c_parser_expr_list (c_parser *parser, bool convert_p)
5565 expr = c_parser_expr_no_commas (parser, NULL);
5567 expr = default_function_array_conversion (expr);
5568 ret = cur = build_tree_list (NULL_TREE, expr.value);
5569 while (c_parser_next_token_is (parser, CPP_COMMA))
5571 c_parser_consume_token (parser);
5572 expr = c_parser_expr_no_commas (parser, NULL);
5574 expr = default_function_array_conversion (expr);
5575 cur = TREE_CHAIN (cur) = build_tree_list (NULL_TREE, expr.value);
5581 /* Parse Objective-C-specific constructs. */
5583 /* Parse an objc-class-definition.
5585 objc-class-definition:
5586 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5587 objc-class-instance-variables[opt] objc-methodprotolist @end
5588 @implementation identifier objc-superclass[opt]
5589 objc-class-instance-variables[opt]
5590 @interface identifier ( identifier ) objc-protocol-refs[opt]
5591 objc-methodprotolist @end
5592 @implementation identifier ( identifier )
5597 "@interface identifier (" must start "@interface identifier (
5598 identifier ) ...": objc-methodprotolist in the first production may
5599 not start with a parenthesized identifier as a declarator of a data
5600 definition with no declaration specifiers if the objc-superclass,
5601 objc-protocol-refs and objc-class-instance-variables are omitted. */
5604 c_parser_objc_class_definition (c_parser *parser)
5609 if (c_parser_next_token_is_keyword (parser, RID_AT_INTERFACE))
5611 else if (c_parser_next_token_is_keyword (parser, RID_AT_IMPLEMENTATION))
5615 c_parser_consume_token (parser);
5616 if (c_parser_next_token_is_not (parser, CPP_NAME))
5618 c_parser_error (parser, "expected identifier");
5621 id1 = c_parser_peek_token (parser)->value;
5622 c_parser_consume_token (parser);
5623 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
5626 tree proto = NULL_TREE;
5627 c_parser_consume_token (parser);
5628 if (c_parser_next_token_is_not (parser, CPP_NAME))
5630 c_parser_error (parser, "expected identifier");
5631 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5634 id2 = c_parser_peek_token (parser)->value;
5635 c_parser_consume_token (parser);
5636 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
5639 objc_start_category_implementation (id1, id2);
5642 if (c_parser_next_token_is (parser, CPP_LESS))
5643 proto = c_parser_objc_protocol_refs (parser);
5644 objc_start_category_interface (id1, id2, proto);
5645 c_parser_objc_methodprotolist (parser);
5646 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5647 objc_finish_interface ();
5650 if (c_parser_next_token_is (parser, CPP_COLON))
5652 c_parser_consume_token (parser);
5653 if (c_parser_next_token_is_not (parser, CPP_NAME))
5655 c_parser_error (parser, "expected identifier");
5658 superclass = c_parser_peek_token (parser)->value;
5659 c_parser_consume_token (parser);
5662 superclass = NULL_TREE;
5665 tree proto = NULL_TREE;
5666 if (c_parser_next_token_is (parser, CPP_LESS))
5667 proto = c_parser_objc_protocol_refs (parser);
5668 objc_start_class_interface (id1, superclass, proto);
5671 objc_start_class_implementation (id1, superclass);
5672 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5673 c_parser_objc_class_instance_variables (parser);
5676 objc_continue_interface ();
5677 c_parser_objc_methodprotolist (parser);
5678 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5679 objc_finish_interface ();
5683 objc_continue_implementation ();
5688 /* Parse objc-class-instance-variables.
5690 objc-class-instance-variables:
5691 { objc-instance-variable-decl-list[opt] }
5693 objc-instance-variable-decl-list:
5694 objc-visibility-spec
5695 objc-instance-variable-decl ;
5697 objc-instance-variable-decl-list objc-visibility-spec
5698 objc-instance-variable-decl-list objc-instance-variable-decl ;
5699 objc-instance-variable-decl-list ;
5701 objc-visibility-spec:
5706 objc-instance-variable-decl:
5711 c_parser_objc_class_instance_variables (c_parser *parser)
5713 gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE));
5714 c_parser_consume_token (parser);
5715 while (c_parser_next_token_is_not (parser, CPP_EOF))
5718 /* Parse any stray semicolon. */
5719 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
5722 pedwarn ("extra semicolon in struct or union specified");
5723 c_parser_consume_token (parser);
5726 /* Stop if at the end of the instance variables. */
5727 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
5729 c_parser_consume_token (parser);
5732 /* Parse any objc-visibility-spec. */
5733 if (c_parser_next_token_is_keyword (parser, RID_AT_PRIVATE))
5735 c_parser_consume_token (parser);
5736 objc_set_visibility (2);
5739 else if (c_parser_next_token_is_keyword (parser, RID_AT_PROTECTED))
5741 c_parser_consume_token (parser);
5742 objc_set_visibility (0);
5745 else if (c_parser_next_token_is_keyword (parser, RID_AT_PUBLIC))
5747 c_parser_consume_token (parser);
5748 objc_set_visibility (1);
5751 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
5753 c_parser_pragma (parser, pragma_external);
5757 /* Parse some comma-separated declarations. */
5758 decls = c_parser_struct_declaration (parser);
5760 /* Comma-separated instance variables are chained together in
5761 reverse order; add them one by one. */
5762 tree ivar = nreverse (decls);
5763 for (; ivar; ivar = TREE_CHAIN (ivar))
5764 objc_add_instance_variable (copy_node (ivar));
5766 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5770 /* Parse an objc-class-declaration.
5772 objc-class-declaration:
5773 @class identifier-list ;
5777 c_parser_objc_class_declaration (c_parser *parser)
5779 tree list = NULL_TREE;
5780 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_CLASS));
5781 c_parser_consume_token (parser);
5782 /* Any identifiers, including those declared as type names, are OK
5787 if (c_parser_next_token_is_not (parser, CPP_NAME))
5789 c_parser_error (parser, "expected identifier");
5792 id = c_parser_peek_token (parser)->value;
5793 list = chainon (list, build_tree_list (NULL_TREE, id));
5794 c_parser_consume_token (parser);
5795 if (c_parser_next_token_is (parser, CPP_COMMA))
5796 c_parser_consume_token (parser);
5800 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5801 objc_declare_class (list);
5804 /* Parse an objc-alias-declaration.
5806 objc-alias-declaration:
5807 @compatibility_alias identifier identifier ;
5811 c_parser_objc_alias_declaration (c_parser *parser)
5814 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_ALIAS));
5815 c_parser_consume_token (parser);
5816 if (c_parser_next_token_is_not (parser, CPP_NAME))
5818 c_parser_error (parser, "expected identifier");
5819 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
5822 id1 = c_parser_peek_token (parser)->value;
5823 c_parser_consume_token (parser);
5824 if (c_parser_next_token_is_not (parser, CPP_NAME))
5826 c_parser_error (parser, "expected identifier");
5827 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
5830 id2 = c_parser_peek_token (parser)->value;
5831 c_parser_consume_token (parser);
5832 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5833 objc_declare_alias (id1, id2);
5836 /* Parse an objc-protocol-definition.
5838 objc-protocol-definition:
5839 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
5840 @protocol identifier-list ;
5842 "@protocol identifier ;" should be resolved as "@protocol
5843 identifier-list ;": objc-methodprotolist may not start with a
5844 semicolon in the first alternative if objc-protocol-refs are
5848 c_parser_objc_protocol_definition (c_parser *parser)
5850 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROTOCOL));
5851 c_parser_consume_token (parser);
5852 if (c_parser_next_token_is_not (parser, CPP_NAME))
5854 c_parser_error (parser, "expected identifier");
5857 if (c_parser_peek_2nd_token (parser)->type == CPP_COMMA
5858 || c_parser_peek_2nd_token (parser)->type == CPP_SEMICOLON)
5860 tree list = NULL_TREE;
5861 /* Any identifiers, including those declared as type names, are
5866 if (c_parser_next_token_is_not (parser, CPP_NAME))
5868 c_parser_error (parser, "expected identifier");
5871 id = c_parser_peek_token (parser)->value;
5872 list = chainon (list, build_tree_list (NULL_TREE, id));
5873 c_parser_consume_token (parser);
5874 if (c_parser_next_token_is (parser, CPP_COMMA))
5875 c_parser_consume_token (parser);
5879 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5880 objc_declare_protocols (list);
5884 tree id = c_parser_peek_token (parser)->value;
5885 tree proto = NULL_TREE;
5886 c_parser_consume_token (parser);
5887 if (c_parser_next_token_is (parser, CPP_LESS))
5888 proto = c_parser_objc_protocol_refs (parser);
5889 objc_pq_context = 1;
5890 objc_start_protocol (id, proto);
5891 c_parser_objc_methodprotolist (parser);
5892 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5893 objc_pq_context = 0;
5894 objc_finish_interface ();
5898 /* Parse an objc-method-type.
5905 static enum tree_code
5906 c_parser_objc_method_type (c_parser *parser)
5908 switch (c_parser_peek_token (parser)->type)
5911 c_parser_consume_token (parser);
5914 c_parser_consume_token (parser);
5921 /* Parse an objc-method-definition.
5923 objc-method-definition:
5924 objc-method-type objc-method-decl ;[opt] compound-statement
5928 c_parser_objc_method_definition (c_parser *parser)
5930 enum tree_code type = c_parser_objc_method_type (parser);
5932 objc_set_method_type (type);
5933 objc_pq_context = 1;
5934 decl = c_parser_objc_method_decl (parser);
5935 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
5937 c_parser_consume_token (parser);
5939 pedwarn ("extra semicolon in method definition specified");
5941 if (!c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5943 c_parser_error (parser, "expected %<{%>");
5946 objc_pq_context = 0;
5947 objc_start_method_definition (decl);
5948 add_stmt (c_parser_compound_statement (parser));
5949 objc_finish_method_definition (current_function_decl);
5952 /* Parse an objc-methodprotolist.
5954 objc-methodprotolist:
5956 objc-methodprotolist objc-methodproto
5957 objc-methodprotolist declaration
5958 objc-methodprotolist ;
5960 The declaration is a data definition, which may be missing
5961 declaration specifiers under the same rules and diagnostics as
5962 other data definitions outside functions, and the stray semicolon
5963 is diagnosed the same way as a stray semicolon outside a
5967 c_parser_objc_methodprotolist (c_parser *parser)
5971 /* The list is terminated by @end. */
5972 switch (c_parser_peek_token (parser)->type)
5976 pedwarn ("ISO C does not allow extra %<;%> outside of a function");
5977 c_parser_consume_token (parser);
5981 c_parser_objc_methodproto (parser);
5984 c_parser_pragma (parser, pragma_external);
5989 if (c_parser_next_token_is_keyword (parser, RID_AT_END))
5991 c_parser_declaration_or_fndef (parser, false, true, false, true);
5997 /* Parse an objc-methodproto.
6000 objc-method-type objc-method-decl ;
6004 c_parser_objc_methodproto (c_parser *parser)
6006 enum tree_code type = c_parser_objc_method_type (parser);
6008 objc_set_method_type (type);
6009 /* Remember protocol qualifiers in prototypes. */
6010 objc_pq_context = 1;
6011 decl = c_parser_objc_method_decl (parser);
6012 /* Forget protocol qualifiers here. */
6013 objc_pq_context = 0;
6014 objc_add_method_declaration (decl);
6015 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
6018 /* Parse an objc-method-decl.
6021 ( objc-type-name ) objc-selector
6023 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6024 objc-keyword-selector objc-optparmlist
6026 objc-keyword-selector:
6028 objc-keyword-selector objc-keyword-decl
6031 objc-selector : ( objc-type-name ) identifier
6032 objc-selector : identifier
6033 : ( objc-type-name ) identifier
6037 objc-optparms objc-optellipsis
6041 objc-opt-parms , parameter-declaration
6049 c_parser_objc_method_decl (c_parser *parser)
6051 tree type = NULL_TREE;
6053 tree parms = NULL_TREE;
6054 bool ellipsis = false;
6056 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6058 c_parser_consume_token (parser);
6059 type = c_parser_objc_type_name (parser);
6060 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6062 sel = c_parser_objc_selector (parser);
6063 /* If there is no selector, or a colon follows, we have an
6064 objc-keyword-selector. If there is a selector, and a colon does
6065 not follow, that selector ends the objc-method-decl. */
6066 if (!sel || c_parser_next_token_is (parser, CPP_COLON))
6069 tree list = NULL_TREE;
6072 tree atype = NULL_TREE, id, keyworddecl;
6073 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6075 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6077 c_parser_consume_token (parser);
6078 atype = c_parser_objc_type_name (parser);
6079 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6082 if (c_parser_next_token_is_not (parser, CPP_NAME))
6084 c_parser_error (parser, "expected identifier");
6085 return error_mark_node;
6087 id = c_parser_peek_token (parser)->value;
6088 c_parser_consume_token (parser);
6089 keyworddecl = objc_build_keyword_decl (tsel, atype, id);
6090 list = chainon (list, keyworddecl);
6091 tsel = c_parser_objc_selector (parser);
6092 if (!tsel && c_parser_next_token_is_not (parser, CPP_COLON))
6095 /* Parse the optional parameter list. Optional Objective-C
6096 method parameters follow the C syntax, and may include '...'
6097 to denote a variable number of arguments. */
6098 parms = make_node (TREE_LIST);
6099 while (c_parser_next_token_is (parser, CPP_COMMA))
6101 struct c_parm *parm;
6102 c_parser_consume_token (parser);
6103 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
6106 c_parser_consume_token (parser);
6109 parm = c_parser_parameter_declaration (parser, NULL_TREE);
6112 parms = chainon (parms,
6113 build_tree_list (NULL_TREE, grokparm (parm)));
6117 return objc_build_method_signature (type, sel, parms, ellipsis);
6120 /* Parse an objc-type-name.
6123 objc-type-qualifiers[opt] type-name
6124 objc-type-qualifiers[opt]
6126 objc-type-qualifiers:
6128 objc-type-qualifiers objc-type-qualifier
6130 objc-type-qualifier: one of
6131 in out inout bycopy byref oneway
6135 c_parser_objc_type_name (c_parser *parser)
6137 tree quals = NULL_TREE;
6138 struct c_type_name *typename = NULL;
6139 tree type = NULL_TREE;
6142 c_token *token = c_parser_peek_token (parser);
6143 if (token->type == CPP_KEYWORD
6144 && (token->keyword == RID_IN
6145 || token->keyword == RID_OUT
6146 || token->keyword == RID_INOUT
6147 || token->keyword == RID_BYCOPY
6148 || token->keyword == RID_BYREF
6149 || token->keyword == RID_ONEWAY))
6151 quals = chainon (quals, build_tree_list (NULL_TREE, token->value));
6152 c_parser_consume_token (parser);
6157 if (c_parser_next_token_starts_typename (parser))
6158 typename = c_parser_type_name (parser);
6160 type = groktypename (typename);
6161 return build_tree_list (quals, type);
6164 /* Parse objc-protocol-refs.
6171 c_parser_objc_protocol_refs (c_parser *parser)
6173 tree list = NULL_TREE;
6174 gcc_assert (c_parser_next_token_is (parser, CPP_LESS));
6175 c_parser_consume_token (parser);
6176 /* Any identifiers, including those declared as type names, are OK
6181 if (c_parser_next_token_is_not (parser, CPP_NAME))
6183 c_parser_error (parser, "expected identifier");
6186 id = c_parser_peek_token (parser)->value;
6187 list = chainon (list, build_tree_list (NULL_TREE, id));
6188 c_parser_consume_token (parser);
6189 if (c_parser_next_token_is (parser, CPP_COMMA))
6190 c_parser_consume_token (parser);
6194 c_parser_require (parser, CPP_GREATER, "expected %<>%>");
6198 /* Parse an objc-try-catch-statement.
6200 objc-try-catch-statement:
6201 @try compound-statement objc-catch-list[opt]
6202 @try compound-statement objc-catch-list[opt] @finally compound-statement
6205 @catch ( parameter-declaration ) compound-statement
6206 objc-catch-list @catch ( parameter-declaration ) compound-statement
6210 c_parser_objc_try_catch_statement (c_parser *parser)
6214 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_TRY));
6215 c_parser_consume_token (parser);
6216 loc = c_parser_peek_token (parser)->location;
6217 stmt = c_parser_compound_statement (parser);
6218 objc_begin_try_stmt (loc, stmt);
6219 while (c_parser_next_token_is_keyword (parser, RID_AT_CATCH))
6221 struct c_parm *parm;
6222 c_parser_consume_token (parser);
6223 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6225 parm = c_parser_parameter_declaration (parser, NULL_TREE);
6228 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6231 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6232 objc_begin_catch_clause (grokparm (parm));
6233 if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
6234 c_parser_compound_statement_nostart (parser);
6235 objc_finish_catch_clause ();
6237 if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY))
6241 c_parser_consume_token (parser);
6242 finloc = c_parser_peek_token (parser)->location;
6243 finstmt = c_parser_compound_statement (parser);
6244 objc_build_finally_clause (finloc, finstmt);
6246 objc_finish_try_stmt ();
6249 /* Parse an objc-synchronized-statement.
6251 objc-synchronized-statement:
6252 @synchronized ( expression ) compound-statement
6256 c_parser_objc_synchronized_statement (c_parser *parser)
6260 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED));
6261 c_parser_consume_token (parser);
6262 loc = c_parser_peek_token (parser)->location;
6263 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6265 expr = c_parser_expression (parser).value;
6266 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6269 expr = error_mark_node;
6270 stmt = c_parser_compound_statement (parser);
6271 objc_build_synchronized (loc, expr, stmt);
6274 /* Parse an objc-selector; return NULL_TREE without an error if the
6275 next token is not an objc-selector.
6280 enum struct union if else while do for switch case default
6281 break continue return goto asm sizeof typeof __alignof
6282 unsigned long const short volatile signed restrict _Complex
6283 in out inout bycopy byref oneway int char float double void _Bool
6285 ??? Why this selection of keywords but not, for example, storage
6286 class specifiers? */
6289 c_parser_objc_selector (c_parser *parser)
6291 c_token *token = c_parser_peek_token (parser);
6292 tree value = token->value;
6293 if (token->type == CPP_NAME)
6295 c_parser_consume_token (parser);
6298 if (token->type != CPP_KEYWORD)
6300 switch (token->keyword)
6341 c_parser_consume_token (parser);
6348 /* Parse an objc-selector-arg.
6352 objc-keywordname-list
6354 objc-keywordname-list:
6356 objc-keywordname-list objc-keywordname
6364 c_parser_objc_selector_arg (c_parser *parser)
6366 tree sel = c_parser_objc_selector (parser);
6367 tree list = NULL_TREE;
6368 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
6372 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6374 list = chainon (list, build_tree_list (sel, NULL_TREE));
6375 sel = c_parser_objc_selector (parser);
6376 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
6382 /* Parse an objc-receiver.
6391 c_parser_objc_receiver (c_parser *parser)
6393 if (c_parser_peek_token (parser)->type == CPP_NAME
6394 && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME
6395 || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME))
6397 tree id = c_parser_peek_token (parser)->value;
6398 c_parser_consume_token (parser);
6399 return objc_get_class_reference (id);
6401 return c_parser_expression (parser).value;
6404 /* Parse objc-message-args.
6408 objc-keywordarg-list
6410 objc-keywordarg-list:
6412 objc-keywordarg-list objc-keywordarg
6415 objc-selector : objc-keywordexpr
6420 c_parser_objc_message_args (c_parser *parser)
6422 tree sel = c_parser_objc_selector (parser);
6423 tree list = NULL_TREE;
6424 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
6429 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6431 keywordexpr = c_parser_objc_keywordexpr (parser);
6432 list = chainon (list, build_tree_list (sel, keywordexpr));
6433 sel = c_parser_objc_selector (parser);
6434 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
6440 /* Parse an objc-keywordexpr.
6447 c_parser_objc_keywordexpr (c_parser *parser)
6449 tree list = c_parser_expr_list (parser, true);
6450 if (TREE_CHAIN (list) == NULL_TREE)
6452 /* Just return the expression, remove a level of
6454 return TREE_VALUE (list);
6458 /* We have a comma expression, we will collapse later. */
6464 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6465 should be considered, statements. ALLOW_STMT is true if we're within
6466 the context of a function and such pragmas are to be allowed. Returns
6467 true if we actually parsed such a pragma. */
6470 c_parser_pragma (c_parser *parser, enum pragma_context context)
6474 id = c_parser_peek_token (parser)->pragma_kind;
6475 gcc_assert (id != PRAGMA_NONE);
6479 case PRAGMA_OMP_BARRIER:
6480 if (context != pragma_compound)
6482 if (context == pragma_stmt)
6483 c_parser_error (parser, "%<#pragma omp barrier%> may only be "
6484 "used in compound statements");
6487 c_parser_omp_barrier (parser);
6490 case PRAGMA_OMP_FLUSH:
6491 if (context != pragma_compound)
6493 if (context == pragma_stmt)
6494 c_parser_error (parser, "%<#pragma omp flush%> may only be "
6495 "used in compound statements");
6498 c_parser_omp_flush (parser);
6501 case PRAGMA_OMP_THREADPRIVATE:
6502 c_parser_omp_threadprivate (parser);
6505 case PRAGMA_OMP_SECTION:
6506 error ("%<#pragma omp section%> may only be used in "
6507 "%<#pragma omp sections%> construct");
6508 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6511 case PRAGMA_GCC_PCH_PREPROCESS:
6512 c_parser_error (parser, "%<#pragma GCC pch_preprocess%> must be first");
6513 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6517 if (id < PRAGMA_FIRST_EXTERNAL)
6519 if (context == pragma_external)
6522 c_parser_error (parser, "expected declaration specifiers");
6523 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6526 c_parser_omp_construct (parser);
6532 c_parser_consume_pragma (parser);
6533 c_invoke_pragma_handler (id);
6535 /* Skip to EOL, but suppress any error message. Those will have been
6536 generated by the handler routine through calling error, as opposed
6537 to calling c_parser_error. */
6538 parser->error = true;
6539 c_parser_skip_to_pragma_eol (parser);
6544 /* The interface the pragma parsers have to the lexer. */
6547 pragma_lex (tree *value)
6549 c_token *tok = c_parser_peek_token (the_parser);
6550 enum cpp_ttype ret = tok->type;
6552 *value = tok->value;
6553 if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF)
6557 if (ret == CPP_KEYWORD)
6559 c_parser_consume_token (the_parser);
6566 c_parser_pragma_pch_preprocess (c_parser *parser)
6570 c_parser_consume_pragma (parser);
6571 if (c_parser_next_token_is (parser, CPP_STRING))
6573 name = c_parser_peek_token (parser)->value;
6574 c_parser_consume_token (parser);
6577 c_parser_error (parser, "expected string literal");
6578 c_parser_skip_to_pragma_eol (parser);
6581 c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name));
6584 /* OpenMP 2.5 parsing routines. */
6586 /* Returns name of the next clause.
6587 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6588 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6589 returned and the token is consumed. */
6591 static pragma_omp_clause
6592 c_parser_omp_clause_name (c_parser *parser)
6594 pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE;
6596 if (c_parser_next_token_is_keyword (parser, RID_IF))
6597 result = PRAGMA_OMP_CLAUSE_IF;
6598 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
6599 result = PRAGMA_OMP_CLAUSE_DEFAULT;
6600 else if (c_parser_next_token_is (parser, CPP_NAME))
6602 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
6607 if (!strcmp ("copyin", p))
6608 result = PRAGMA_OMP_CLAUSE_COPYIN;
6609 else if (!strcmp ("copyprivate", p))
6610 result = PRAGMA_OMP_CLAUSE_COPYPRIVATE;
6613 if (!strcmp ("firstprivate", p))
6614 result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE;
6617 if (!strcmp ("lastprivate", p))
6618 result = PRAGMA_OMP_CLAUSE_LASTPRIVATE;
6621 if (!strcmp ("nowait", p))
6622 result = PRAGMA_OMP_CLAUSE_NOWAIT;
6623 else if (!strcmp ("num_threads", p))
6624 result = PRAGMA_OMP_CLAUSE_NUM_THREADS;
6627 if (!strcmp ("ordered", p))
6628 result = PRAGMA_OMP_CLAUSE_ORDERED;
6631 if (!strcmp ("private", p))
6632 result = PRAGMA_OMP_CLAUSE_PRIVATE;
6635 if (!strcmp ("reduction", p))
6636 result = PRAGMA_OMP_CLAUSE_REDUCTION;
6639 if (!strcmp ("schedule", p))
6640 result = PRAGMA_OMP_CLAUSE_SCHEDULE;
6641 else if (!strcmp ("shared", p))
6642 result = PRAGMA_OMP_CLAUSE_SHARED;
6647 if (result != PRAGMA_OMP_CLAUSE_NONE)
6648 c_parser_consume_token (parser);
6653 /* Validate that a clause of the given type does not already exist. */
6656 check_no_duplicate_clause (tree clauses, enum tree_code code, const char *name)
6660 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
6661 if (OMP_CLAUSE_CODE (c) == code)
6663 error ("too many %qs clauses", name);
6671 variable-list , identifier
6673 If KIND is nonzero, create the appropriate node and install the decl
6674 in OMP_CLAUSE_DECL and add the node to the head of the list.
6676 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6677 return the list created. */
6680 c_parser_omp_variable_list (c_parser *parser, enum omp_clause_code kind,
6683 if (c_parser_next_token_is_not (parser, CPP_NAME)
6684 || c_parser_peek_token (parser)->id_kind != C_ID_ID)
6685 c_parser_error (parser, "expected identifier");
6687 while (c_parser_next_token_is (parser, CPP_NAME)
6688 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
6690 tree t = lookup_name (c_parser_peek_token (parser)->value);
6693 undeclared_variable (c_parser_peek_token (parser)->value,
6694 c_parser_peek_token (parser)->location);
6695 else if (t == error_mark_node)
6699 tree u = build_omp_clause (kind);
6700 OMP_CLAUSE_DECL (u) = t;
6701 OMP_CLAUSE_CHAIN (u) = list;
6705 list = tree_cons (t, NULL_TREE, list);
6707 c_parser_consume_token (parser);
6709 if (c_parser_next_token_is_not (parser, CPP_COMMA))
6712 c_parser_consume_token (parser);
6718 /* Similarly, but expect leading and trailing parenthesis. This is a very
6719 common case for omp clauses. */
6722 c_parser_omp_var_list_parens (c_parser *parser, enum tree_code kind, tree list)
6724 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6726 list = c_parser_omp_variable_list (parser, kind, list);
6727 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6733 copyin ( variable-list ) */
6736 c_parser_omp_clause_copyin (c_parser *parser, tree list)
6738 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYIN, list);
6742 copyprivate ( variable-list ) */
6745 c_parser_omp_clause_copyprivate (c_parser *parser, tree list)
6747 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYPRIVATE, list);
6751 default ( shared | none ) */
6754 c_parser_omp_clause_default (c_parser *parser, tree list)
6756 enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED;
6759 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6761 if (c_parser_next_token_is (parser, CPP_NAME))
6763 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
6768 if (strcmp ("none", p) != 0)
6770 kind = OMP_CLAUSE_DEFAULT_NONE;
6774 if (strcmp ("shared", p) != 0)
6776 kind = OMP_CLAUSE_DEFAULT_SHARED;
6783 c_parser_consume_token (parser);
6788 c_parser_error (parser, "expected %<none%> or %<shared%>");
6790 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6792 if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED)
6795 check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default");
6796 c = build_omp_clause (OMP_CLAUSE_DEFAULT);
6797 OMP_CLAUSE_CHAIN (c) = list;
6798 OMP_CLAUSE_DEFAULT_KIND (c) = kind;
6804 firstprivate ( variable-list ) */
6807 c_parser_omp_clause_firstprivate (c_parser *parser, tree list)
6809 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_FIRSTPRIVATE, list);
6813 if ( expression ) */
6816 c_parser_omp_clause_if (c_parser *parser, tree list)
6818 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6820 tree t = c_parser_paren_condition (parser);
6823 check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if");
6825 c = build_omp_clause (OMP_CLAUSE_IF);
6826 OMP_CLAUSE_IF_EXPR (c) = t;
6827 OMP_CLAUSE_CHAIN (c) = list;
6831 c_parser_error (parser, "expected %<(%>");
6837 lastprivate ( variable-list ) */
6840 c_parser_omp_clause_lastprivate (c_parser *parser, tree list)
6842 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_LASTPRIVATE, list);
6849 c_parser_omp_clause_nowait (c_parser *parser ATTRIBUTE_UNUSED, tree list)
6853 check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait");
6855 c = build_omp_clause (OMP_CLAUSE_NOWAIT);
6856 OMP_CLAUSE_CHAIN (c) = list;
6861 num_threads ( expression ) */
6864 c_parser_omp_clause_num_threads (c_parser *parser, tree list)
6866 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6868 tree c, t = c_parser_expression (parser).value;
6870 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6872 if (!INTEGRAL_TYPE_P (TREE_TYPE (t)))
6874 c_parser_error (parser, "expected integer expression");
6878 /* Attempt to statically determine when the number isn't positive. */
6879 c = fold_build2 (LE_EXPR, boolean_type_node, t,
6880 build_int_cst (TREE_TYPE (t), 0));
6881 if (c == boolean_true_node)
6883 warning (0, "%<num_threads%> value must be positive");
6884 t = integer_one_node;
6887 check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads");
6889 c = build_omp_clause (OMP_CLAUSE_NUM_THREADS);
6890 OMP_CLAUSE_NUM_THREADS_EXPR (c) = t;
6891 OMP_CLAUSE_CHAIN (c) = list;
6902 c_parser_omp_clause_ordered (c_parser *parser ATTRIBUTE_UNUSED, tree list)
6906 check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered");
6908 c = build_omp_clause (OMP_CLAUSE_ORDERED);
6909 OMP_CLAUSE_CHAIN (c) = list;
6914 private ( variable-list ) */
6917 c_parser_omp_clause_private (c_parser *parser, tree list)
6919 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_PRIVATE, list);
6923 reduction ( reduction-operator : variable-list )
6926 One of: + * - & ^ | && || */
6929 c_parser_omp_clause_reduction (c_parser *parser, tree list)
6931 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6933 enum tree_code code;
6935 switch (c_parser_peek_token (parser)->type)
6947 code = BIT_AND_EXPR;
6950 code = BIT_XOR_EXPR;
6953 code = BIT_IOR_EXPR;
6956 code = TRUTH_ANDIF_EXPR;
6959 code = TRUTH_ORIF_EXPR;
6962 c_parser_error (parser,
6963 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
6964 "%<^%>, %<|%>, %<&&%>, or %<||%>");
6965 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
6968 c_parser_consume_token (parser);
6969 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6973 nl = c_parser_omp_variable_list (parser, OMP_CLAUSE_REDUCTION, list);
6974 for (c = nl; c != list; c = OMP_CLAUSE_CHAIN (c))
6975 OMP_CLAUSE_REDUCTION_CODE (c) = code;
6979 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6985 schedule ( schedule-kind )
6986 schedule ( schedule-kind , expression )
6989 static | dynamic | guided | runtime
6993 c_parser_omp_clause_schedule (c_parser *parser, tree list)
6997 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7000 c = build_omp_clause (OMP_CLAUSE_SCHEDULE);
7002 if (c_parser_next_token_is (parser, CPP_NAME))
7004 tree kind = c_parser_peek_token (parser)->value;
7005 const char *p = IDENTIFIER_POINTER (kind);
7010 if (strcmp ("dynamic", p) != 0)
7012 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC;
7016 if (strcmp ("guided", p) != 0)
7018 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED;
7022 if (strcmp ("runtime", p) != 0)
7024 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME;
7031 else if (c_parser_next_token_is_keyword (parser, RID_STATIC))
7032 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC;
7036 c_parser_consume_token (parser);
7037 if (c_parser_next_token_is (parser, CPP_COMMA))
7039 c_parser_consume_token (parser);
7041 t = c_parser_expr_no_commas (parser, NULL).value;
7043 if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME)
7044 error ("schedule %<runtime%> does not take "
7045 "a %<chunk_size%> parameter");
7046 else if (TREE_CODE (TREE_TYPE (t)) == INTEGER_TYPE)
7047 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t;
7049 c_parser_error (parser, "expected integer expression");
7051 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7054 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
7055 "expected %<,%> or %<)%>");
7057 check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule");
7058 OMP_CLAUSE_CHAIN (c) = list;
7062 c_parser_error (parser, "invalid schedule kind");
7063 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
7068 shared ( variable-list ) */
7071 c_parser_omp_clause_shared (c_parser *parser, tree list)
7073 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_SHARED, list);
7076 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7077 is a bitmask in MASK. Return the list of clauses found; the result
7078 of clause default goes in *pdefault. */
7081 c_parser_omp_all_clauses (c_parser *parser, unsigned int mask,
7084 tree clauses = NULL;
7086 while (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7088 const pragma_omp_clause c_kind = c_parser_omp_clause_name (parser);
7090 tree prev = clauses;
7094 case PRAGMA_OMP_CLAUSE_COPYIN:
7095 clauses = c_parser_omp_clause_copyin (parser, clauses);
7098 case PRAGMA_OMP_CLAUSE_COPYPRIVATE:
7099 clauses = c_parser_omp_clause_copyprivate (parser, clauses);
7100 c_name = "copyprivate";
7102 case PRAGMA_OMP_CLAUSE_DEFAULT:
7103 clauses = c_parser_omp_clause_default (parser, clauses);
7106 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE:
7107 clauses = c_parser_omp_clause_firstprivate (parser, clauses);
7108 c_name = "firstprivate";
7110 case PRAGMA_OMP_CLAUSE_IF:
7111 clauses = c_parser_omp_clause_if (parser, clauses);
7114 case PRAGMA_OMP_CLAUSE_LASTPRIVATE:
7115 clauses = c_parser_omp_clause_lastprivate (parser, clauses);
7116 c_name = "lastprivate";
7118 case PRAGMA_OMP_CLAUSE_NOWAIT:
7119 clauses = c_parser_omp_clause_nowait (parser, clauses);
7122 case PRAGMA_OMP_CLAUSE_NUM_THREADS:
7123 clauses = c_parser_omp_clause_num_threads (parser, clauses);
7124 c_name = "num_threads";
7126 case PRAGMA_OMP_CLAUSE_ORDERED:
7127 clauses = c_parser_omp_clause_ordered (parser, clauses);
7130 case PRAGMA_OMP_CLAUSE_PRIVATE:
7131 clauses = c_parser_omp_clause_private (parser, clauses);
7134 case PRAGMA_OMP_CLAUSE_REDUCTION:
7135 clauses = c_parser_omp_clause_reduction (parser, clauses);
7136 c_name = "reduction";
7138 case PRAGMA_OMP_CLAUSE_SCHEDULE:
7139 clauses = c_parser_omp_clause_schedule (parser, clauses);
7140 c_name = "schedule";
7142 case PRAGMA_OMP_CLAUSE_SHARED:
7143 clauses = c_parser_omp_clause_shared (parser, clauses);
7147 c_parser_error (parser, "expected %<#pragma omp%> clause");
7151 if (((mask >> c_kind) & 1) == 0 && !parser->error)
7153 /* Remove the invalid clause(s) from the list to avoid
7154 confusing the rest of the compiler. */
7156 error ("%qs is not valid for %qs", c_name, where);
7161 c_parser_skip_to_pragma_eol (parser);
7163 return c_finish_omp_clauses (clauses);
7170 In practice, we're also interested in adding the statement to an
7171 outer node. So it is convenient if we work around the fact that
7172 c_parser_statement calls add_stmt. */
7175 c_parser_omp_structured_block (c_parser *parser)
7177 tree stmt = push_stmt_list ();
7178 c_parser_statement (parser);
7179 return pop_stmt_list (stmt);
7183 # pragma omp atomic new-line
7187 x binop= expr | x++ | ++x | x-- | --x
7189 +, *, -, /, &, ^, |, <<, >>
7191 where x is an lvalue expression with scalar type. */
7194 c_parser_omp_atomic (c_parser *parser)
7197 enum tree_code code;
7199 c_parser_skip_to_pragma_eol (parser);
7201 lhs = c_parser_unary_expression (parser).value;
7202 switch (TREE_CODE (lhs))
7206 c_parser_skip_to_end_of_block_or_statement (parser);
7209 case PREINCREMENT_EXPR:
7210 case POSTINCREMENT_EXPR:
7211 lhs = TREE_OPERAND (lhs, 0);
7213 rhs = integer_one_node;
7216 case PREDECREMENT_EXPR:
7217 case POSTDECREMENT_EXPR:
7218 lhs = TREE_OPERAND (lhs, 0);
7220 rhs = integer_one_node;
7224 switch (c_parser_peek_token (parser)->type)
7230 code = TRUNC_DIV_EXPR;
7245 code = BIT_AND_EXPR;
7248 code = BIT_IOR_EXPR;
7251 code = BIT_XOR_EXPR;
7254 c_parser_error (parser,
7255 "invalid operator for %<#pragma omp atomic%>");
7259 c_parser_consume_token (parser);
7260 rhs = c_parser_expression (parser).value;
7263 c_finish_omp_atomic (code, lhs, rhs);
7264 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7269 # pragma omp barrier new-line
7273 c_parser_omp_barrier (c_parser *parser)
7275 c_parser_consume_pragma (parser);
7276 c_parser_skip_to_pragma_eol (parser);
7278 c_finish_omp_barrier ();
7282 # pragma omp critical [(name)] new-line
7287 c_parser_omp_critical (c_parser *parser)
7289 tree stmt, name = NULL;
7291 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7293 c_parser_consume_token (parser);
7294 if (c_parser_next_token_is (parser, CPP_NAME))
7296 name = c_parser_peek_token (parser)->value;
7297 c_parser_consume_token (parser);
7298 c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7301 c_parser_error (parser, "expected identifier");
7303 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7304 c_parser_error (parser, "expected %<(%> or end of line");
7305 c_parser_skip_to_pragma_eol (parser);
7307 stmt = c_parser_omp_structured_block (parser);
7308 return c_finish_omp_critical (stmt, name);
7312 # pragma omp flush flush-vars[opt] new-line
7315 ( variable-list ) */
7318 c_parser_omp_flush (c_parser *parser)
7320 c_parser_consume_pragma (parser);
7321 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7322 c_parser_omp_var_list_parens (parser, 0, NULL);
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 c_finish_omp_flush ();
7330 /* Parse the restricted form of the for statment allowed by OpenMP.
7331 The real trick here is to determine the loop control variable early
7332 so that we can push a new decl if necessary to make it private. */
7335 c_parser_omp_for_loop (c_parser *parser)
7337 tree decl, cond, incr, save_break, save_cont, body, init;
7340 if (!c_parser_next_token_is_keyword (parser, RID_FOR))
7342 c_parser_error (parser, "for statement expected");
7345 loc = c_parser_peek_token (parser)->location;
7346 c_parser_consume_token (parser);
7348 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7351 /* Parse the initialization declaration or expression. */
7352 if (c_parser_next_token_starts_declspecs (parser))
7354 c_parser_declaration_or_fndef (parser, true, true, true, true);
7355 decl = check_for_loop_decls ();
7360 else if (c_parser_next_token_is (parser, CPP_NAME)
7361 && c_parser_peek_2nd_token (parser)->type == CPP_EQ)
7363 decl = c_parser_postfix_expression (parser).value;
7365 c_parser_require (parser, CPP_EQ, "expected %<=%>");
7367 init = c_parser_expr_no_commas (parser, NULL).value;
7368 init = build_modify_expr (decl, NOP_EXPR, init);
7369 init = c_process_expr_stmt (init);
7371 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7376 /* Parse the loop condition. */
7378 if (c_parser_next_token_is_not (parser, CPP_SEMICOLON))
7380 cond = c_parser_expression_conv (parser).value;
7381 cond = c_objc_common_truthvalue_conversion (cond);
7383 SET_EXPR_LOCATION (cond, input_location);
7385 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7387 /* Parse the increment expression. */
7389 if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN))
7390 incr = c_process_expr_stmt (c_parser_expression (parser).value);
7391 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7394 save_break = c_break_label;
7395 c_break_label = size_one_node;
7396 save_cont = c_cont_label;
7397 c_cont_label = NULL_TREE;
7398 body = push_stmt_list ();
7400 add_stmt (c_parser_c99_block_statement (parser));
7402 add_stmt (build1 (LABEL_EXPR, void_type_node, c_cont_label));
7404 body = pop_stmt_list (body);
7405 c_break_label = save_break;
7406 c_cont_label = save_cont;
7408 /* Only bother calling c_finish_omp_for if we havn't already generated
7409 an error from the initialization parsing. */
7410 if (decl != NULL && decl != error_mark_node && init != error_mark_node)
7411 return c_finish_omp_for (loc, decl, init, cond, incr, body, NULL);
7415 c_parser_error (parser, "expected iteration declaration or initialization");
7416 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7417 decl = init = cond = incr = NULL_TREE;
7422 #pragma omp for for-clause[optseq] new-line
7426 #define OMP_FOR_CLAUSE_MASK \
7427 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7428 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7429 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7430 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7431 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7432 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7433 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7436 c_parser_omp_for (c_parser *parser)
7438 tree block, clauses, ret;
7440 clauses = c_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK,
7443 block = c_begin_compound_stmt (true);
7444 ret = c_parser_omp_for_loop (parser);
7446 OMP_FOR_CLAUSES (ret) = clauses;
7447 block = c_end_compound_stmt (block, true);
7454 # pragma omp master new-line
7459 c_parser_omp_master (c_parser *parser)
7461 c_parser_skip_to_pragma_eol (parser);
7462 return c_finish_omp_master (c_parser_omp_structured_block (parser));
7466 # pragma omp ordered new-line
7471 c_parser_omp_ordered (c_parser *parser)
7473 c_parser_skip_to_pragma_eol (parser);
7474 return c_finish_omp_ordered (c_parser_omp_structured_block (parser));
7480 { section-sequence }
7483 section-directive[opt] structured-block
7484 section-sequence section-directive structured-block */
7487 c_parser_omp_sections_scope (c_parser *parser)
7490 bool error_suppress = false;
7493 if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
7495 /* Avoid skipping until the end of the block. */
7496 parser->error = false;
7500 stmt = push_stmt_list ();
7502 loc = c_parser_peek_token (parser)->location;
7503 if (c_parser_peek_token (parser)->pragma_kind != PRAGMA_OMP_SECTION)
7505 substmt = push_stmt_list ();
7509 c_parser_statement (parser);
7511 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
7513 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7515 if (c_parser_next_token_is (parser, CPP_EOF))
7519 substmt = pop_stmt_list (substmt);
7520 substmt = build1 (OMP_SECTION, void_type_node, substmt);
7521 SET_EXPR_LOCATION (substmt, loc);
7527 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7529 if (c_parser_next_token_is (parser, CPP_EOF))
7532 loc = c_parser_peek_token (parser)->location;
7533 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
7535 c_parser_consume_pragma (parser);
7536 c_parser_skip_to_pragma_eol (parser);
7537 error_suppress = false;
7539 else if (!error_suppress)
7541 error ("expected %<#pragma omp section%> or %<}%>");
7542 error_suppress = true;
7545 substmt = c_parser_omp_structured_block (parser);
7546 substmt = build1 (OMP_SECTION, void_type_node, substmt);
7547 SET_EXPR_LOCATION (substmt, loc);
7550 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE,
7551 "expected %<#pragma omp section%> or %<}%>");
7553 substmt = pop_stmt_list (stmt);
7555 stmt = make_node (OMP_SECTIONS);
7556 TREE_TYPE (stmt) = void_type_node;
7557 OMP_SECTIONS_BODY (stmt) = substmt;
7559 return add_stmt (stmt);
7563 # pragma omp sections sections-clause[optseq] newline
7567 #define OMP_SECTIONS_CLAUSE_MASK \
7568 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7569 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7570 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7571 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7572 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7575 c_parser_omp_sections (c_parser *parser)
7577 tree block, clauses, ret;
7579 clauses = c_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK,
7580 "#pragma omp sections");
7582 block = c_begin_compound_stmt (true);
7583 ret = c_parser_omp_sections_scope (parser);
7585 OMP_SECTIONS_CLAUSES (ret) = clauses;
7586 block = c_end_compound_stmt (block, true);
7593 # pragma parallel parallel-clause new-line
7594 # pragma parallel for parallel-for-clause new-line
7595 # pragma parallel sections parallel-sections-clause new-line
7598 #define OMP_PARALLEL_CLAUSE_MASK \
7599 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
7600 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7601 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7602 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
7603 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
7604 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
7605 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7606 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
7609 c_parser_omp_parallel (c_parser *parser)
7611 enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL;
7612 const char *p_name = "#pragma omp parallel";
7613 tree stmt, clauses, par_clause, ws_clause, block;
7614 unsigned int mask = OMP_PARALLEL_CLAUSE_MASK;
7616 if (c_parser_next_token_is_keyword (parser, RID_FOR))
7618 c_parser_consume_token (parser);
7619 p_kind = PRAGMA_OMP_PARALLEL_FOR;
7620 p_name = "#pragma omp parallel for";
7621 mask |= OMP_FOR_CLAUSE_MASK;
7622 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
7624 else if (c_parser_next_token_is (parser, CPP_NAME))
7626 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
7627 if (strcmp (p, "sections") == 0)
7629 c_parser_consume_token (parser);
7630 p_kind = PRAGMA_OMP_PARALLEL_SECTIONS;
7631 p_name = "#pragma omp parallel sections";
7632 mask |= OMP_SECTIONS_CLAUSE_MASK;
7633 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
7637 clauses = c_parser_omp_all_clauses (parser, mask, p_name);
7641 case PRAGMA_OMP_PARALLEL:
7642 block = c_begin_omp_parallel ();
7643 c_parser_statement (parser);
7644 stmt = c_finish_omp_parallel (clauses, block);
7647 case PRAGMA_OMP_PARALLEL_FOR:
7648 block = c_begin_omp_parallel ();
7649 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
7650 stmt = c_parser_omp_for_loop (parser);
7652 OMP_FOR_CLAUSES (stmt) = ws_clause;
7653 stmt = c_finish_omp_parallel (par_clause, block);
7654 OMP_PARALLEL_COMBINED (stmt) = 1;
7657 case PRAGMA_OMP_PARALLEL_SECTIONS:
7658 block = c_begin_omp_parallel ();
7659 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
7660 stmt = c_parser_omp_sections_scope (parser);
7662 OMP_SECTIONS_CLAUSES (stmt) = ws_clause;
7663 stmt = c_finish_omp_parallel (par_clause, block);
7664 OMP_PARALLEL_COMBINED (stmt) = 1;
7675 # pragma omp single single-clause[optseq] new-line
7679 #define OMP_SINGLE_CLAUSE_MASK \
7680 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7681 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7682 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
7683 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7686 c_parser_omp_single (c_parser *parser)
7688 tree stmt = make_node (OMP_SINGLE);
7689 TREE_TYPE (stmt) = void_type_node;
7691 OMP_SINGLE_CLAUSES (stmt)
7692 = c_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK,
7693 "#pragma omp single");
7694 OMP_SINGLE_BODY (stmt) = c_parser_omp_structured_block (parser);
7696 return add_stmt (stmt);
7700 /* Main entry point to parsing most OpenMP pragmas. */
7703 c_parser_omp_construct (c_parser *parser)
7705 enum pragma_kind p_kind;
7709 loc = c_parser_peek_token (parser)->location;
7710 p_kind = c_parser_peek_token (parser)->pragma_kind;
7711 c_parser_consume_pragma (parser);
7715 case PRAGMA_OMP_ATOMIC:
7716 c_parser_omp_atomic (parser);
7718 case PRAGMA_OMP_CRITICAL:
7719 stmt = c_parser_omp_critical (parser);
7721 case PRAGMA_OMP_FOR:
7722 stmt = c_parser_omp_for (parser);
7724 case PRAGMA_OMP_MASTER:
7725 stmt = c_parser_omp_master (parser);
7727 case PRAGMA_OMP_ORDERED:
7728 stmt = c_parser_omp_ordered (parser);
7730 case PRAGMA_OMP_PARALLEL:
7731 stmt = c_parser_omp_parallel (parser);
7733 case PRAGMA_OMP_SECTIONS:
7734 stmt = c_parser_omp_sections (parser);
7736 case PRAGMA_OMP_SINGLE:
7737 stmt = c_parser_omp_single (parser);
7744 SET_EXPR_LOCATION (stmt, loc);
7749 # pragma omp threadprivate (variable-list) */
7752 c_parser_omp_threadprivate (c_parser *parser)
7756 c_parser_consume_pragma (parser);
7757 vars = c_parser_omp_var_list_parens (parser, 0, NULL);
7759 if (!targetm.have_tls)
7760 sorry ("threadprivate variables not supported in this target");
7762 /* Mark every variable in VARS to be assigned thread local storage. */
7763 for (t = vars; t; t = TREE_CHAIN (t))
7765 tree v = TREE_PURPOSE (t);
7767 /* If V had already been marked threadprivate, it doesn't matter
7768 whether it had been used prior to this point. */
7769 if (TREE_USED (v) && !C_DECL_THREADPRIVATE_P (v))
7770 error ("%qE declared %<threadprivate%> after first use", v);
7771 else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v))
7772 error ("automatic variable %qE cannot be %<threadprivate%>", v);
7773 else if (! COMPLETE_TYPE_P (TREE_TYPE (v)))
7774 error ("%<threadprivate%> %qE has incomplete type", v);
7777 if (! DECL_THREAD_LOCAL_P (v))
7779 DECL_TLS_MODEL (v) = decl_default_tls_model (v);
7780 /* If rtl has been already set for this var, call
7781 make_decl_rtl once again, so that encode_section_info
7782 has a chance to look at the new decl flags. */
7783 if (DECL_RTL_SET_P (v))
7786 C_DECL_THREADPRIVATE_P (v) = 1;
7790 c_parser_skip_to_pragma_eol (parser);
7794 /* Parse a single source file. */
7799 /* Use local storage to begin. If the first token is a pragma, parse it.
7800 If it is #pragma GCC pch_preprocess, then this will load a PCH file
7801 which will cause garbage collection. */
7804 memset (&tparser, 0, sizeof tparser);
7805 the_parser = &tparser;
7807 if (c_parser_peek_token (&tparser)->pragma_kind == PRAGMA_GCC_PCH_PREPROCESS)
7808 c_parser_pragma_pch_preprocess (&tparser);
7810 the_parser = GGC_NEW (c_parser);
7811 *the_parser = tparser;
7813 c_parser_translation_unit (the_parser);
7817 #include "gt-c-parser.h"