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 if (debug_info_level > DINFO_LEVEL_NONE)
4695 used_types_insert (type_name->specs->type, cfun);
4697 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4698 return c_parser_postfix_expression_after_paren_type (parser,
4700 expr = c_parser_cast_expression (parser, NULL);
4701 expr = default_function_array_conversion (expr);
4702 ret.value = c_cast_expr (type_name, expr.value);
4703 ret.original_code = ERROR_MARK;
4707 return c_parser_unary_expression (parser);
4710 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4716 unary-operator cast-expression
4717 sizeof unary-expression
4718 sizeof ( type-name )
4720 unary-operator: one of
4726 __alignof__ unary-expression
4727 __alignof__ ( type-name )
4730 unary-operator: one of
4731 __extension__ __real__ __imag__
4733 In addition, the GNU syntax treats ++ and -- as unary operators, so
4734 they may be applied to cast expressions with errors for non-lvalues
4737 static struct c_expr
4738 c_parser_unary_expression (c_parser *parser)
4741 struct c_expr ret, op;
4742 switch (c_parser_peek_token (parser)->type)
4745 c_parser_consume_token (parser);
4746 op = c_parser_cast_expression (parser, NULL);
4747 op = default_function_array_conversion (op);
4748 return parser_build_unary_op (PREINCREMENT_EXPR, op);
4749 case CPP_MINUS_MINUS:
4750 c_parser_consume_token (parser);
4751 op = c_parser_cast_expression (parser, NULL);
4752 op = default_function_array_conversion (op);
4753 return parser_build_unary_op (PREDECREMENT_EXPR, op);
4755 c_parser_consume_token (parser);
4756 return parser_build_unary_op (ADDR_EXPR,
4757 c_parser_cast_expression (parser, NULL));
4759 c_parser_consume_token (parser);
4760 op = c_parser_cast_expression (parser, NULL);
4761 op = default_function_array_conversion (op);
4762 ret.value = build_indirect_ref (op.value, "unary *");
4763 ret.original_code = ERROR_MARK;
4766 c_parser_consume_token (parser);
4767 if (!c_dialect_objc () && !in_system_header)
4768 warning (OPT_Wtraditional,
4769 "traditional C rejects the unary plus operator");
4770 op = c_parser_cast_expression (parser, NULL);
4771 op = default_function_array_conversion (op);
4772 return parser_build_unary_op (CONVERT_EXPR, op);
4774 c_parser_consume_token (parser);
4775 op = c_parser_cast_expression (parser, NULL);
4776 op = default_function_array_conversion (op);
4777 return parser_build_unary_op (NEGATE_EXPR, op);
4779 c_parser_consume_token (parser);
4780 op = c_parser_cast_expression (parser, NULL);
4781 op = default_function_array_conversion (op);
4782 return parser_build_unary_op (BIT_NOT_EXPR, op);
4784 c_parser_consume_token (parser);
4785 op = c_parser_cast_expression (parser, NULL);
4786 op = default_function_array_conversion (op);
4787 return parser_build_unary_op (TRUTH_NOT_EXPR, op);
4789 /* Refer to the address of a label as a pointer. */
4790 c_parser_consume_token (parser);
4791 if (c_parser_next_token_is (parser, CPP_NAME))
4793 ret.value = finish_label_address_expr
4794 (c_parser_peek_token (parser)->value);
4795 c_parser_consume_token (parser);
4799 c_parser_error (parser, "expected identifier");
4800 ret.value = error_mark_node;
4802 ret.original_code = ERROR_MARK;
4805 switch (c_parser_peek_token (parser)->keyword)
4808 return c_parser_sizeof_expression (parser);
4810 return c_parser_alignof_expression (parser);
4812 c_parser_consume_token (parser);
4813 ext = disable_extension_diagnostics ();
4814 ret = c_parser_cast_expression (parser, NULL);
4815 restore_extension_diagnostics (ext);
4818 c_parser_consume_token (parser);
4819 op = c_parser_cast_expression (parser, NULL);
4820 op = default_function_array_conversion (op);
4821 return parser_build_unary_op (REALPART_EXPR, op);
4823 c_parser_consume_token (parser);
4824 op = c_parser_cast_expression (parser, NULL);
4825 op = default_function_array_conversion (op);
4826 return parser_build_unary_op (IMAGPART_EXPR, op);
4828 return c_parser_postfix_expression (parser);
4831 return c_parser_postfix_expression (parser);
4835 /* Parse a sizeof expression. */
4837 static struct c_expr
4838 c_parser_sizeof_expression (c_parser *parser)
4841 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SIZEOF));
4842 c_parser_consume_token (parser);
4845 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4846 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4848 /* Either sizeof ( type-name ) or sizeof unary-expression
4849 starting with a compound literal. */
4850 struct c_type_name *type_name;
4851 c_parser_consume_token (parser);
4852 type_name = c_parser_type_name (parser);
4853 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4854 if (type_name == NULL)
4859 ret.value = error_mark_node;
4860 ret.original_code = ERROR_MARK;
4863 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4865 expr = c_parser_postfix_expression_after_paren_type (parser,
4869 /* sizeof ( type-name ). */
4872 return c_expr_sizeof_type (type_name);
4876 expr = c_parser_unary_expression (parser);
4880 if (TREE_CODE (expr.value) == COMPONENT_REF
4881 && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1)))
4882 error ("%<sizeof%> applied to a bit-field");
4883 return c_expr_sizeof_expr (expr);
4887 /* Parse an alignof expression. */
4889 static struct c_expr
4890 c_parser_alignof_expression (c_parser *parser)
4893 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF));
4894 c_parser_consume_token (parser);
4897 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4898 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4900 /* Either __alignof__ ( type-name ) or __alignof__
4901 unary-expression starting with a compound literal. */
4902 struct c_type_name *type_name;
4904 c_parser_consume_token (parser);
4905 type_name = c_parser_type_name (parser);
4906 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4907 if (type_name == NULL)
4912 ret.value = error_mark_node;
4913 ret.original_code = ERROR_MARK;
4916 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4918 expr = c_parser_postfix_expression_after_paren_type (parser,
4922 /* alignof ( type-name ). */
4925 ret.value = c_alignof (groktypename (type_name));
4926 ret.original_code = ERROR_MARK;
4932 expr = c_parser_unary_expression (parser);
4936 ret.value = c_alignof_expr (expr.value);
4937 ret.original_code = ERROR_MARK;
4942 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
4946 postfix-expression [ expression ]
4947 postfix-expression ( argument-expression-list[opt] )
4948 postfix-expression . identifier
4949 postfix-expression -> identifier
4950 postfix-expression ++
4951 postfix-expression --
4952 ( type-name ) { initializer-list }
4953 ( type-name ) { initializer-list , }
4955 argument-expression-list:
4957 argument-expression-list , argument-expression
4969 (treated as a keyword in GNU C)
4972 ( compound-statement )
4973 __builtin_va_arg ( assignment-expression , type-name )
4974 __builtin_offsetof ( type-name , offsetof-member-designator )
4975 __builtin_choose_expr ( assignment-expression ,
4976 assignment-expression ,
4977 assignment-expression )
4978 __builtin_types_compatible_p ( type-name , type-name )
4980 offsetof-member-designator:
4982 offsetof-member-designator . identifier
4983 offsetof-member-designator [ expression ]
4988 [ objc-receiver objc-message-args ]
4989 @selector ( objc-selector-arg )
4990 @protocol ( identifier )
4991 @encode ( type-name )
4995 static struct c_expr
4996 c_parser_postfix_expression (c_parser *parser)
4998 struct c_expr expr, e1, e2, e3;
4999 struct c_type_name *t1, *t2;
5000 switch (c_parser_peek_token (parser)->type)
5005 expr.value = c_parser_peek_token (parser)->value;
5006 expr.original_code = ERROR_MARK;
5007 c_parser_consume_token (parser);
5011 expr.value = c_parser_peek_token (parser)->value;
5012 expr.original_code = STRING_CST;
5013 c_parser_consume_token (parser);
5015 case CPP_OBJC_STRING:
5016 gcc_assert (c_dialect_objc ());
5018 = objc_build_string_object (c_parser_peek_token (parser)->value);
5019 expr.original_code = ERROR_MARK;
5020 c_parser_consume_token (parser);
5023 if (c_parser_peek_token (parser)->id_kind != C_ID_ID)
5025 c_parser_error (parser, "expected expression");
5026 expr.value = error_mark_node;
5027 expr.original_code = ERROR_MARK;
5031 tree id = c_parser_peek_token (parser)->value;
5032 location_t loc = c_parser_peek_token (parser)->location;
5033 c_parser_consume_token (parser);
5034 expr.value = build_external_ref (id,
5035 (c_parser_peek_token (parser)->type
5036 == CPP_OPEN_PAREN), loc);
5037 expr.original_code = ERROR_MARK;
5040 case CPP_OPEN_PAREN:
5041 /* A parenthesized expression, statement expression or compound
5043 if (c_parser_peek_2nd_token (parser)->type == CPP_OPEN_BRACE)
5045 /* A statement expression. */
5047 c_parser_consume_token (parser);
5048 c_parser_consume_token (parser);
5049 if (cur_stmt_list == NULL)
5051 error ("braced-group within expression allowed "
5052 "only inside a function");
5053 parser->error = true;
5054 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
5055 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5056 expr.value = error_mark_node;
5057 expr.original_code = ERROR_MARK;
5060 stmt = c_begin_stmt_expr ();
5061 c_parser_compound_statement_nostart (parser);
5062 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5065 pedwarn ("ISO C forbids braced-groups within expressions");
5066 expr.value = c_finish_stmt_expr (stmt);
5067 expr.original_code = ERROR_MARK;
5069 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser)))
5071 /* A compound literal. ??? Can we actually get here rather
5072 than going directly to
5073 c_parser_postfix_expression_after_paren_type from
5075 struct c_type_name *type_name;
5076 c_parser_consume_token (parser);
5077 type_name = c_parser_type_name (parser);
5078 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5080 if (type_name == NULL)
5082 expr.value = error_mark_node;
5083 expr.original_code = ERROR_MARK;
5086 expr = c_parser_postfix_expression_after_paren_type (parser,
5091 /* A parenthesized expression. */
5092 c_parser_consume_token (parser);
5093 expr = c_parser_expression (parser);
5094 if (TREE_CODE (expr.value) == MODIFY_EXPR)
5095 TREE_NO_WARNING (expr.value) = 1;
5096 expr.original_code = ERROR_MARK;
5097 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5102 switch (c_parser_peek_token (parser)->keyword)
5104 case RID_FUNCTION_NAME:
5105 case RID_PRETTY_FUNCTION_NAME:
5106 case RID_C99_FUNCTION_NAME:
5107 expr.value = fname_decl (c_parser_peek_token (parser)->keyword,
5108 c_parser_peek_token (parser)->value);
5109 expr.original_code = ERROR_MARK;
5110 c_parser_consume_token (parser);
5113 c_parser_consume_token (parser);
5114 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5116 expr.value = error_mark_node;
5117 expr.original_code = ERROR_MARK;
5120 e1 = c_parser_expr_no_commas (parser, NULL);
5121 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5123 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5124 expr.value = error_mark_node;
5125 expr.original_code = ERROR_MARK;
5128 t1 = c_parser_type_name (parser);
5129 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5133 expr.value = error_mark_node;
5134 expr.original_code = ERROR_MARK;
5138 expr.value = build_va_arg (e1.value, groktypename (t1));
5139 expr.original_code = ERROR_MARK;
5143 c_parser_consume_token (parser);
5144 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5146 expr.value = error_mark_node;
5147 expr.original_code = ERROR_MARK;
5150 t1 = c_parser_type_name (parser);
5153 expr.value = error_mark_node;
5154 expr.original_code = ERROR_MARK;
5157 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5159 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5160 expr.value = error_mark_node;
5161 expr.original_code = ERROR_MARK;
5165 tree type = groktypename (t1);
5167 if (type == error_mark_node)
5168 offsetof_ref = error_mark_node;
5170 offsetof_ref = build1 (INDIRECT_REF, type, NULL);
5171 /* Parse the second argument to __builtin_offsetof. We
5172 must have one identifier, and beyond that we want to
5173 accept sub structure and sub array references. */
5174 if (c_parser_next_token_is (parser, CPP_NAME))
5176 offsetof_ref = build_component_ref
5177 (offsetof_ref, c_parser_peek_token (parser)->value);
5178 c_parser_consume_token (parser);
5179 while (c_parser_next_token_is (parser, CPP_DOT)
5180 || c_parser_next_token_is (parser,
5183 if (c_parser_next_token_is (parser, CPP_DOT))
5185 c_parser_consume_token (parser);
5186 if (c_parser_next_token_is_not (parser,
5189 c_parser_error (parser, "expected identifier");
5192 offsetof_ref = build_component_ref
5194 c_parser_peek_token (parser)->value);
5195 c_parser_consume_token (parser);
5200 c_parser_consume_token (parser);
5201 idx = c_parser_expression (parser).value;
5202 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5204 offsetof_ref = build_array_ref (offsetof_ref, idx);
5209 c_parser_error (parser, "expected identifier");
5210 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5212 expr.value = fold_offsetof (offsetof_ref);
5213 expr.original_code = ERROR_MARK;
5216 case RID_CHOOSE_EXPR:
5217 c_parser_consume_token (parser);
5218 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5220 expr.value = error_mark_node;
5221 expr.original_code = ERROR_MARK;
5224 e1 = c_parser_expr_no_commas (parser, NULL);
5225 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5227 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5228 expr.value = error_mark_node;
5229 expr.original_code = ERROR_MARK;
5232 e2 = c_parser_expr_no_commas (parser, NULL);
5233 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5235 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5236 expr.value = error_mark_node;
5237 expr.original_code = ERROR_MARK;
5240 e3 = c_parser_expr_no_commas (parser, NULL);
5241 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5246 c = fold (e1.value);
5247 if (TREE_CODE (c) != INTEGER_CST)
5248 error ("first argument to %<__builtin_choose_expr%> not"
5250 expr = integer_zerop (c) ? e3 : e2;
5253 case RID_TYPES_COMPATIBLE_P:
5254 c_parser_consume_token (parser);
5255 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5257 expr.value = error_mark_node;
5258 expr.original_code = ERROR_MARK;
5261 t1 = c_parser_type_name (parser);
5264 expr.value = error_mark_node;
5265 expr.original_code = ERROR_MARK;
5268 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5270 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5271 expr.value = error_mark_node;
5272 expr.original_code = ERROR_MARK;
5275 t2 = c_parser_type_name (parser);
5278 expr.value = error_mark_node;
5279 expr.original_code = ERROR_MARK;
5282 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5287 e1 = TYPE_MAIN_VARIANT (groktypename (t1));
5288 e2 = TYPE_MAIN_VARIANT (groktypename (t2));
5290 expr.value = comptypes (e1, e2)
5291 ? build_int_cst (NULL_TREE, 1)
5292 : build_int_cst (NULL_TREE, 0);
5293 expr.original_code = ERROR_MARK;
5296 case RID_AT_SELECTOR:
5297 gcc_assert (c_dialect_objc ());
5298 c_parser_consume_token (parser);
5299 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5301 expr.value = error_mark_node;
5302 expr.original_code = ERROR_MARK;
5306 tree sel = c_parser_objc_selector_arg (parser);
5307 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5309 expr.value = objc_build_selector_expr (sel);
5310 expr.original_code = ERROR_MARK;
5313 case RID_AT_PROTOCOL:
5314 gcc_assert (c_dialect_objc ());
5315 c_parser_consume_token (parser);
5316 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5318 expr.value = error_mark_node;
5319 expr.original_code = ERROR_MARK;
5322 if (c_parser_next_token_is_not (parser, CPP_NAME))
5324 c_parser_error (parser, "expected identifier");
5325 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5326 expr.value = error_mark_node;
5327 expr.original_code = ERROR_MARK;
5331 tree id = c_parser_peek_token (parser)->value;
5332 c_parser_consume_token (parser);
5333 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5335 expr.value = objc_build_protocol_expr (id);
5336 expr.original_code = ERROR_MARK;
5340 /* Extension to support C-structures in the archiver. */
5341 gcc_assert (c_dialect_objc ());
5342 c_parser_consume_token (parser);
5343 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5345 expr.value = error_mark_node;
5346 expr.original_code = ERROR_MARK;
5349 t1 = c_parser_type_name (parser);
5352 expr.value = error_mark_node;
5353 expr.original_code = ERROR_MARK;
5354 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5357 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5360 tree type = groktypename (t1);
5361 expr.value = objc_build_encode_expr (type);
5362 expr.original_code = ERROR_MARK;
5366 c_parser_error (parser, "expected expression");
5367 expr.value = error_mark_node;
5368 expr.original_code = ERROR_MARK;
5372 case CPP_OPEN_SQUARE:
5373 if (c_dialect_objc ())
5375 tree receiver, args;
5376 c_parser_consume_token (parser);
5377 receiver = c_parser_objc_receiver (parser);
5378 args = c_parser_objc_message_args (parser);
5379 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5381 expr.value = objc_build_message_expr (build_tree_list (receiver,
5383 expr.original_code = ERROR_MARK;
5386 /* Else fall through to report error. */
5388 c_parser_error (parser, "expected expression");
5389 expr.value = error_mark_node;
5390 expr.original_code = ERROR_MARK;
5393 return c_parser_postfix_expression_after_primary (parser, expr);
5396 /* Parse a postfix expression after a parenthesized type name: the
5397 brace-enclosed initializer of a compound literal, possibly followed
5398 by some postfix operators. This is separate because it is not
5399 possible to tell until after the type name whether a cast
5400 expression has a cast or a compound literal, or whether the operand
5401 of sizeof is a parenthesized type name or starts with a compound
5404 static struct c_expr
5405 c_parser_postfix_expression_after_paren_type (c_parser *parser,
5406 struct c_type_name *type_name)
5411 start_init (NULL_TREE, NULL, 0);
5412 type = groktypename (type_name);
5413 if (C_TYPE_VARIABLE_SIZE (type))
5415 error ("compound literal has variable size");
5416 type = error_mark_node;
5418 init = c_parser_braced_init (parser, type, false);
5420 maybe_warn_string_init (type, init);
5422 if (pedantic && !flag_isoc99)
5423 pedwarn ("ISO C90 forbids compound literals");
5424 expr.value = build_compound_literal (type, init.value);
5425 expr.original_code = ERROR_MARK;
5426 return c_parser_postfix_expression_after_primary (parser, expr);
5429 /* Parse a postfix expression after the initial primary or compound
5430 literal; that is, parse a series of postfix operators. */
5432 static struct c_expr
5433 c_parser_postfix_expression_after_primary (c_parser *parser,
5436 tree ident, idx, exprlist;
5439 switch (c_parser_peek_token (parser)->type)
5441 case CPP_OPEN_SQUARE:
5442 /* Array reference. */
5443 c_parser_consume_token (parser);
5444 idx = c_parser_expression (parser).value;
5445 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5447 expr.value = build_array_ref (expr.value, idx);
5448 expr.original_code = ERROR_MARK;
5450 case CPP_OPEN_PAREN:
5451 /* Function call. */
5452 c_parser_consume_token (parser);
5453 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
5454 exprlist = NULL_TREE;
5456 exprlist = c_parser_expr_list (parser, true);
5457 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5459 expr.value = build_function_call (expr.value, exprlist);
5460 expr.original_code = ERROR_MARK;
5463 /* Structure element reference. */
5464 c_parser_consume_token (parser);
5465 expr = default_function_array_conversion (expr);
5466 if (c_parser_next_token_is (parser, CPP_NAME))
5467 ident = c_parser_peek_token (parser)->value;
5470 c_parser_error (parser, "expected identifier");
5471 expr.value = error_mark_node;
5472 expr.original_code = ERROR_MARK;
5475 c_parser_consume_token (parser);
5476 expr.value = build_component_ref (expr.value, ident);
5477 expr.original_code = ERROR_MARK;
5480 /* Structure element reference. */
5481 c_parser_consume_token (parser);
5482 expr = default_function_array_conversion (expr);
5483 if (c_parser_next_token_is (parser, CPP_NAME))
5484 ident = c_parser_peek_token (parser)->value;
5487 c_parser_error (parser, "expected identifier");
5488 expr.value = error_mark_node;
5489 expr.original_code = ERROR_MARK;
5492 c_parser_consume_token (parser);
5493 expr.value = build_component_ref (build_indirect_ref (expr.value,
5495 expr.original_code = ERROR_MARK;
5498 /* Postincrement. */
5499 c_parser_consume_token (parser);
5500 expr = default_function_array_conversion (expr);
5501 expr.value = build_unary_op (POSTINCREMENT_EXPR, expr.value, 0);
5502 expr.original_code = ERROR_MARK;
5504 case CPP_MINUS_MINUS:
5505 /* Postdecrement. */
5506 c_parser_consume_token (parser);
5507 expr = default_function_array_conversion (expr);
5508 expr.value = build_unary_op (POSTDECREMENT_EXPR, expr.value, 0);
5509 expr.original_code = ERROR_MARK;
5517 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5520 assignment-expression
5521 expression , assignment-expression
5524 static struct c_expr
5525 c_parser_expression (c_parser *parser)
5528 expr = c_parser_expr_no_commas (parser, NULL);
5529 while (c_parser_next_token_is (parser, CPP_COMMA))
5532 c_parser_consume_token (parser);
5533 next = c_parser_expr_no_commas (parser, NULL);
5534 next = default_function_array_conversion (next);
5535 expr.value = build_compound_expr (expr.value, next.value);
5536 expr.original_code = COMPOUND_EXPR;
5541 /* Parse an expression and convert functions or arrays to
5544 static struct c_expr
5545 c_parser_expression_conv (c_parser *parser)
5548 expr = c_parser_expression (parser);
5549 expr = default_function_array_conversion (expr);
5553 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5554 functions and arrays to pointers.
5557 assignment-expression
5558 nonempty-expr-list , assignment-expression
5562 c_parser_expr_list (c_parser *parser, bool convert_p)
5566 expr = c_parser_expr_no_commas (parser, NULL);
5568 expr = default_function_array_conversion (expr);
5569 ret = cur = build_tree_list (NULL_TREE, expr.value);
5570 while (c_parser_next_token_is (parser, CPP_COMMA))
5572 c_parser_consume_token (parser);
5573 expr = c_parser_expr_no_commas (parser, NULL);
5575 expr = default_function_array_conversion (expr);
5576 cur = TREE_CHAIN (cur) = build_tree_list (NULL_TREE, expr.value);
5582 /* Parse Objective-C-specific constructs. */
5584 /* Parse an objc-class-definition.
5586 objc-class-definition:
5587 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5588 objc-class-instance-variables[opt] objc-methodprotolist @end
5589 @implementation identifier objc-superclass[opt]
5590 objc-class-instance-variables[opt]
5591 @interface identifier ( identifier ) objc-protocol-refs[opt]
5592 objc-methodprotolist @end
5593 @implementation identifier ( identifier )
5598 "@interface identifier (" must start "@interface identifier (
5599 identifier ) ...": objc-methodprotolist in the first production may
5600 not start with a parenthesized identifier as a declarator of a data
5601 definition with no declaration specifiers if the objc-superclass,
5602 objc-protocol-refs and objc-class-instance-variables are omitted. */
5605 c_parser_objc_class_definition (c_parser *parser)
5610 if (c_parser_next_token_is_keyword (parser, RID_AT_INTERFACE))
5612 else if (c_parser_next_token_is_keyword (parser, RID_AT_IMPLEMENTATION))
5616 c_parser_consume_token (parser);
5617 if (c_parser_next_token_is_not (parser, CPP_NAME))
5619 c_parser_error (parser, "expected identifier");
5622 id1 = c_parser_peek_token (parser)->value;
5623 c_parser_consume_token (parser);
5624 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
5627 tree proto = NULL_TREE;
5628 c_parser_consume_token (parser);
5629 if (c_parser_next_token_is_not (parser, CPP_NAME))
5631 c_parser_error (parser, "expected identifier");
5632 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5635 id2 = c_parser_peek_token (parser)->value;
5636 c_parser_consume_token (parser);
5637 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
5640 objc_start_category_implementation (id1, id2);
5643 if (c_parser_next_token_is (parser, CPP_LESS))
5644 proto = c_parser_objc_protocol_refs (parser);
5645 objc_start_category_interface (id1, id2, proto);
5646 c_parser_objc_methodprotolist (parser);
5647 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5648 objc_finish_interface ();
5651 if (c_parser_next_token_is (parser, CPP_COLON))
5653 c_parser_consume_token (parser);
5654 if (c_parser_next_token_is_not (parser, CPP_NAME))
5656 c_parser_error (parser, "expected identifier");
5659 superclass = c_parser_peek_token (parser)->value;
5660 c_parser_consume_token (parser);
5663 superclass = NULL_TREE;
5666 tree proto = NULL_TREE;
5667 if (c_parser_next_token_is (parser, CPP_LESS))
5668 proto = c_parser_objc_protocol_refs (parser);
5669 objc_start_class_interface (id1, superclass, proto);
5672 objc_start_class_implementation (id1, superclass);
5673 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5674 c_parser_objc_class_instance_variables (parser);
5677 objc_continue_interface ();
5678 c_parser_objc_methodprotolist (parser);
5679 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5680 objc_finish_interface ();
5684 objc_continue_implementation ();
5689 /* Parse objc-class-instance-variables.
5691 objc-class-instance-variables:
5692 { objc-instance-variable-decl-list[opt] }
5694 objc-instance-variable-decl-list:
5695 objc-visibility-spec
5696 objc-instance-variable-decl ;
5698 objc-instance-variable-decl-list objc-visibility-spec
5699 objc-instance-variable-decl-list objc-instance-variable-decl ;
5700 objc-instance-variable-decl-list ;
5702 objc-visibility-spec:
5707 objc-instance-variable-decl:
5712 c_parser_objc_class_instance_variables (c_parser *parser)
5714 gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE));
5715 c_parser_consume_token (parser);
5716 while (c_parser_next_token_is_not (parser, CPP_EOF))
5719 /* Parse any stray semicolon. */
5720 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
5723 pedwarn ("extra semicolon in struct or union specified");
5724 c_parser_consume_token (parser);
5727 /* Stop if at the end of the instance variables. */
5728 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
5730 c_parser_consume_token (parser);
5733 /* Parse any objc-visibility-spec. */
5734 if (c_parser_next_token_is_keyword (parser, RID_AT_PRIVATE))
5736 c_parser_consume_token (parser);
5737 objc_set_visibility (2);
5740 else if (c_parser_next_token_is_keyword (parser, RID_AT_PROTECTED))
5742 c_parser_consume_token (parser);
5743 objc_set_visibility (0);
5746 else if (c_parser_next_token_is_keyword (parser, RID_AT_PUBLIC))
5748 c_parser_consume_token (parser);
5749 objc_set_visibility (1);
5752 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
5754 c_parser_pragma (parser, pragma_external);
5758 /* Parse some comma-separated declarations. */
5759 decls = c_parser_struct_declaration (parser);
5761 /* Comma-separated instance variables are chained together in
5762 reverse order; add them one by one. */
5763 tree ivar = nreverse (decls);
5764 for (; ivar; ivar = TREE_CHAIN (ivar))
5765 objc_add_instance_variable (copy_node (ivar));
5767 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5771 /* Parse an objc-class-declaration.
5773 objc-class-declaration:
5774 @class identifier-list ;
5778 c_parser_objc_class_declaration (c_parser *parser)
5780 tree list = NULL_TREE;
5781 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_CLASS));
5782 c_parser_consume_token (parser);
5783 /* Any identifiers, including those declared as type names, are OK
5788 if (c_parser_next_token_is_not (parser, CPP_NAME))
5790 c_parser_error (parser, "expected identifier");
5793 id = c_parser_peek_token (parser)->value;
5794 list = chainon (list, build_tree_list (NULL_TREE, id));
5795 c_parser_consume_token (parser);
5796 if (c_parser_next_token_is (parser, CPP_COMMA))
5797 c_parser_consume_token (parser);
5801 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5802 objc_declare_class (list);
5805 /* Parse an objc-alias-declaration.
5807 objc-alias-declaration:
5808 @compatibility_alias identifier identifier ;
5812 c_parser_objc_alias_declaration (c_parser *parser)
5815 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_ALIAS));
5816 c_parser_consume_token (parser);
5817 if (c_parser_next_token_is_not (parser, CPP_NAME))
5819 c_parser_error (parser, "expected identifier");
5820 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
5823 id1 = c_parser_peek_token (parser)->value;
5824 c_parser_consume_token (parser);
5825 if (c_parser_next_token_is_not (parser, CPP_NAME))
5827 c_parser_error (parser, "expected identifier");
5828 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
5831 id2 = c_parser_peek_token (parser)->value;
5832 c_parser_consume_token (parser);
5833 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5834 objc_declare_alias (id1, id2);
5837 /* Parse an objc-protocol-definition.
5839 objc-protocol-definition:
5840 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
5841 @protocol identifier-list ;
5843 "@protocol identifier ;" should be resolved as "@protocol
5844 identifier-list ;": objc-methodprotolist may not start with a
5845 semicolon in the first alternative if objc-protocol-refs are
5849 c_parser_objc_protocol_definition (c_parser *parser)
5851 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROTOCOL));
5852 c_parser_consume_token (parser);
5853 if (c_parser_next_token_is_not (parser, CPP_NAME))
5855 c_parser_error (parser, "expected identifier");
5858 if (c_parser_peek_2nd_token (parser)->type == CPP_COMMA
5859 || c_parser_peek_2nd_token (parser)->type == CPP_SEMICOLON)
5861 tree list = NULL_TREE;
5862 /* Any identifiers, including those declared as type names, are
5867 if (c_parser_next_token_is_not (parser, CPP_NAME))
5869 c_parser_error (parser, "expected identifier");
5872 id = c_parser_peek_token (parser)->value;
5873 list = chainon (list, build_tree_list (NULL_TREE, id));
5874 c_parser_consume_token (parser);
5875 if (c_parser_next_token_is (parser, CPP_COMMA))
5876 c_parser_consume_token (parser);
5880 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5881 objc_declare_protocols (list);
5885 tree id = c_parser_peek_token (parser)->value;
5886 tree proto = NULL_TREE;
5887 c_parser_consume_token (parser);
5888 if (c_parser_next_token_is (parser, CPP_LESS))
5889 proto = c_parser_objc_protocol_refs (parser);
5890 objc_pq_context = 1;
5891 objc_start_protocol (id, proto);
5892 c_parser_objc_methodprotolist (parser);
5893 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5894 objc_pq_context = 0;
5895 objc_finish_interface ();
5899 /* Parse an objc-method-type.
5906 static enum tree_code
5907 c_parser_objc_method_type (c_parser *parser)
5909 switch (c_parser_peek_token (parser)->type)
5912 c_parser_consume_token (parser);
5915 c_parser_consume_token (parser);
5922 /* Parse an objc-method-definition.
5924 objc-method-definition:
5925 objc-method-type objc-method-decl ;[opt] compound-statement
5929 c_parser_objc_method_definition (c_parser *parser)
5931 enum tree_code type = c_parser_objc_method_type (parser);
5933 objc_set_method_type (type);
5934 objc_pq_context = 1;
5935 decl = c_parser_objc_method_decl (parser);
5936 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
5938 c_parser_consume_token (parser);
5940 pedwarn ("extra semicolon in method definition specified");
5942 if (!c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5944 c_parser_error (parser, "expected %<{%>");
5947 objc_pq_context = 0;
5948 objc_start_method_definition (decl);
5949 add_stmt (c_parser_compound_statement (parser));
5950 objc_finish_method_definition (current_function_decl);
5953 /* Parse an objc-methodprotolist.
5955 objc-methodprotolist:
5957 objc-methodprotolist objc-methodproto
5958 objc-methodprotolist declaration
5959 objc-methodprotolist ;
5961 The declaration is a data definition, which may be missing
5962 declaration specifiers under the same rules and diagnostics as
5963 other data definitions outside functions, and the stray semicolon
5964 is diagnosed the same way as a stray semicolon outside a
5968 c_parser_objc_methodprotolist (c_parser *parser)
5972 /* The list is terminated by @end. */
5973 switch (c_parser_peek_token (parser)->type)
5977 pedwarn ("ISO C does not allow extra %<;%> outside of a function");
5978 c_parser_consume_token (parser);
5982 c_parser_objc_methodproto (parser);
5985 c_parser_pragma (parser, pragma_external);
5990 if (c_parser_next_token_is_keyword (parser, RID_AT_END))
5992 c_parser_declaration_or_fndef (parser, false, true, false, true);
5998 /* Parse an objc-methodproto.
6001 objc-method-type objc-method-decl ;
6005 c_parser_objc_methodproto (c_parser *parser)
6007 enum tree_code type = c_parser_objc_method_type (parser);
6009 objc_set_method_type (type);
6010 /* Remember protocol qualifiers in prototypes. */
6011 objc_pq_context = 1;
6012 decl = c_parser_objc_method_decl (parser);
6013 /* Forget protocol qualifiers here. */
6014 objc_pq_context = 0;
6015 objc_add_method_declaration (decl);
6016 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
6019 /* Parse an objc-method-decl.
6022 ( objc-type-name ) objc-selector
6024 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6025 objc-keyword-selector objc-optparmlist
6027 objc-keyword-selector:
6029 objc-keyword-selector objc-keyword-decl
6032 objc-selector : ( objc-type-name ) identifier
6033 objc-selector : identifier
6034 : ( objc-type-name ) identifier
6038 objc-optparms objc-optellipsis
6042 objc-opt-parms , parameter-declaration
6050 c_parser_objc_method_decl (c_parser *parser)
6052 tree type = NULL_TREE;
6054 tree parms = NULL_TREE;
6055 bool ellipsis = false;
6057 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6059 c_parser_consume_token (parser);
6060 type = c_parser_objc_type_name (parser);
6061 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6063 sel = c_parser_objc_selector (parser);
6064 /* If there is no selector, or a colon follows, we have an
6065 objc-keyword-selector. If there is a selector, and a colon does
6066 not follow, that selector ends the objc-method-decl. */
6067 if (!sel || c_parser_next_token_is (parser, CPP_COLON))
6070 tree list = NULL_TREE;
6073 tree atype = NULL_TREE, id, keyworddecl;
6074 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6076 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6078 c_parser_consume_token (parser);
6079 atype = c_parser_objc_type_name (parser);
6080 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6083 if (c_parser_next_token_is_not (parser, CPP_NAME))
6085 c_parser_error (parser, "expected identifier");
6086 return error_mark_node;
6088 id = c_parser_peek_token (parser)->value;
6089 c_parser_consume_token (parser);
6090 keyworddecl = objc_build_keyword_decl (tsel, atype, id);
6091 list = chainon (list, keyworddecl);
6092 tsel = c_parser_objc_selector (parser);
6093 if (!tsel && c_parser_next_token_is_not (parser, CPP_COLON))
6096 /* Parse the optional parameter list. Optional Objective-C
6097 method parameters follow the C syntax, and may include '...'
6098 to denote a variable number of arguments. */
6099 parms = make_node (TREE_LIST);
6100 while (c_parser_next_token_is (parser, CPP_COMMA))
6102 struct c_parm *parm;
6103 c_parser_consume_token (parser);
6104 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
6107 c_parser_consume_token (parser);
6110 parm = c_parser_parameter_declaration (parser, NULL_TREE);
6113 parms = chainon (parms,
6114 build_tree_list (NULL_TREE, grokparm (parm)));
6118 return objc_build_method_signature (type, sel, parms, ellipsis);
6121 /* Parse an objc-type-name.
6124 objc-type-qualifiers[opt] type-name
6125 objc-type-qualifiers[opt]
6127 objc-type-qualifiers:
6129 objc-type-qualifiers objc-type-qualifier
6131 objc-type-qualifier: one of
6132 in out inout bycopy byref oneway
6136 c_parser_objc_type_name (c_parser *parser)
6138 tree quals = NULL_TREE;
6139 struct c_type_name *typename = NULL;
6140 tree type = NULL_TREE;
6143 c_token *token = c_parser_peek_token (parser);
6144 if (token->type == CPP_KEYWORD
6145 && (token->keyword == RID_IN
6146 || token->keyword == RID_OUT
6147 || token->keyword == RID_INOUT
6148 || token->keyword == RID_BYCOPY
6149 || token->keyword == RID_BYREF
6150 || token->keyword == RID_ONEWAY))
6152 quals = chainon (quals, build_tree_list (NULL_TREE, token->value));
6153 c_parser_consume_token (parser);
6158 if (c_parser_next_token_starts_typename (parser))
6159 typename = c_parser_type_name (parser);
6161 type = groktypename (typename);
6162 return build_tree_list (quals, type);
6165 /* Parse objc-protocol-refs.
6172 c_parser_objc_protocol_refs (c_parser *parser)
6174 tree list = NULL_TREE;
6175 gcc_assert (c_parser_next_token_is (parser, CPP_LESS));
6176 c_parser_consume_token (parser);
6177 /* Any identifiers, including those declared as type names, are OK
6182 if (c_parser_next_token_is_not (parser, CPP_NAME))
6184 c_parser_error (parser, "expected identifier");
6187 id = c_parser_peek_token (parser)->value;
6188 list = chainon (list, build_tree_list (NULL_TREE, id));
6189 c_parser_consume_token (parser);
6190 if (c_parser_next_token_is (parser, CPP_COMMA))
6191 c_parser_consume_token (parser);
6195 c_parser_require (parser, CPP_GREATER, "expected %<>%>");
6199 /* Parse an objc-try-catch-statement.
6201 objc-try-catch-statement:
6202 @try compound-statement objc-catch-list[opt]
6203 @try compound-statement objc-catch-list[opt] @finally compound-statement
6206 @catch ( parameter-declaration ) compound-statement
6207 objc-catch-list @catch ( parameter-declaration ) compound-statement
6211 c_parser_objc_try_catch_statement (c_parser *parser)
6215 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_TRY));
6216 c_parser_consume_token (parser);
6217 loc = c_parser_peek_token (parser)->location;
6218 stmt = c_parser_compound_statement (parser);
6219 objc_begin_try_stmt (loc, stmt);
6220 while (c_parser_next_token_is_keyword (parser, RID_AT_CATCH))
6222 struct c_parm *parm;
6223 c_parser_consume_token (parser);
6224 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6226 parm = c_parser_parameter_declaration (parser, NULL_TREE);
6229 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6232 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6233 objc_begin_catch_clause (grokparm (parm));
6234 if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
6235 c_parser_compound_statement_nostart (parser);
6236 objc_finish_catch_clause ();
6238 if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY))
6242 c_parser_consume_token (parser);
6243 finloc = c_parser_peek_token (parser)->location;
6244 finstmt = c_parser_compound_statement (parser);
6245 objc_build_finally_clause (finloc, finstmt);
6247 objc_finish_try_stmt ();
6250 /* Parse an objc-synchronized-statement.
6252 objc-synchronized-statement:
6253 @synchronized ( expression ) compound-statement
6257 c_parser_objc_synchronized_statement (c_parser *parser)
6261 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED));
6262 c_parser_consume_token (parser);
6263 loc = c_parser_peek_token (parser)->location;
6264 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6266 expr = c_parser_expression (parser).value;
6267 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6270 expr = error_mark_node;
6271 stmt = c_parser_compound_statement (parser);
6272 objc_build_synchronized (loc, expr, stmt);
6275 /* Parse an objc-selector; return NULL_TREE without an error if the
6276 next token is not an objc-selector.
6281 enum struct union if else while do for switch case default
6282 break continue return goto asm sizeof typeof __alignof
6283 unsigned long const short volatile signed restrict _Complex
6284 in out inout bycopy byref oneway int char float double void _Bool
6286 ??? Why this selection of keywords but not, for example, storage
6287 class specifiers? */
6290 c_parser_objc_selector (c_parser *parser)
6292 c_token *token = c_parser_peek_token (parser);
6293 tree value = token->value;
6294 if (token->type == CPP_NAME)
6296 c_parser_consume_token (parser);
6299 if (token->type != CPP_KEYWORD)
6301 switch (token->keyword)
6342 c_parser_consume_token (parser);
6349 /* Parse an objc-selector-arg.
6353 objc-keywordname-list
6355 objc-keywordname-list:
6357 objc-keywordname-list objc-keywordname
6365 c_parser_objc_selector_arg (c_parser *parser)
6367 tree sel = c_parser_objc_selector (parser);
6368 tree list = NULL_TREE;
6369 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
6373 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6375 list = chainon (list, build_tree_list (sel, NULL_TREE));
6376 sel = c_parser_objc_selector (parser);
6377 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
6383 /* Parse an objc-receiver.
6392 c_parser_objc_receiver (c_parser *parser)
6394 if (c_parser_peek_token (parser)->type == CPP_NAME
6395 && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME
6396 || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME))
6398 tree id = c_parser_peek_token (parser)->value;
6399 c_parser_consume_token (parser);
6400 return objc_get_class_reference (id);
6402 return c_parser_expression (parser).value;
6405 /* Parse objc-message-args.
6409 objc-keywordarg-list
6411 objc-keywordarg-list:
6413 objc-keywordarg-list objc-keywordarg
6416 objc-selector : objc-keywordexpr
6421 c_parser_objc_message_args (c_parser *parser)
6423 tree sel = c_parser_objc_selector (parser);
6424 tree list = NULL_TREE;
6425 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
6430 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6432 keywordexpr = c_parser_objc_keywordexpr (parser);
6433 list = chainon (list, build_tree_list (sel, keywordexpr));
6434 sel = c_parser_objc_selector (parser);
6435 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
6441 /* Parse an objc-keywordexpr.
6448 c_parser_objc_keywordexpr (c_parser *parser)
6450 tree list = c_parser_expr_list (parser, true);
6451 if (TREE_CHAIN (list) == NULL_TREE)
6453 /* Just return the expression, remove a level of
6455 return TREE_VALUE (list);
6459 /* We have a comma expression, we will collapse later. */
6465 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6466 should be considered, statements. ALLOW_STMT is true if we're within
6467 the context of a function and such pragmas are to be allowed. Returns
6468 true if we actually parsed such a pragma. */
6471 c_parser_pragma (c_parser *parser, enum pragma_context context)
6475 id = c_parser_peek_token (parser)->pragma_kind;
6476 gcc_assert (id != PRAGMA_NONE);
6480 case PRAGMA_OMP_BARRIER:
6481 if (context != pragma_compound)
6483 if (context == pragma_stmt)
6484 c_parser_error (parser, "%<#pragma omp barrier%> may only be "
6485 "used in compound statements");
6488 c_parser_omp_barrier (parser);
6491 case PRAGMA_OMP_FLUSH:
6492 if (context != pragma_compound)
6494 if (context == pragma_stmt)
6495 c_parser_error (parser, "%<#pragma omp flush%> may only be "
6496 "used in compound statements");
6499 c_parser_omp_flush (parser);
6502 case PRAGMA_OMP_THREADPRIVATE:
6503 c_parser_omp_threadprivate (parser);
6506 case PRAGMA_OMP_SECTION:
6507 error ("%<#pragma omp section%> may only be used in "
6508 "%<#pragma omp sections%> construct");
6509 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6512 case PRAGMA_GCC_PCH_PREPROCESS:
6513 c_parser_error (parser, "%<#pragma GCC pch_preprocess%> must be first");
6514 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6518 if (id < PRAGMA_FIRST_EXTERNAL)
6520 if (context == pragma_external)
6523 c_parser_error (parser, "expected declaration specifiers");
6524 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6527 c_parser_omp_construct (parser);
6533 c_parser_consume_pragma (parser);
6534 c_invoke_pragma_handler (id);
6536 /* Skip to EOL, but suppress any error message. Those will have been
6537 generated by the handler routine through calling error, as opposed
6538 to calling c_parser_error. */
6539 parser->error = true;
6540 c_parser_skip_to_pragma_eol (parser);
6545 /* The interface the pragma parsers have to the lexer. */
6548 pragma_lex (tree *value)
6550 c_token *tok = c_parser_peek_token (the_parser);
6551 enum cpp_ttype ret = tok->type;
6553 *value = tok->value;
6554 if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF)
6558 if (ret == CPP_KEYWORD)
6560 c_parser_consume_token (the_parser);
6567 c_parser_pragma_pch_preprocess (c_parser *parser)
6571 c_parser_consume_pragma (parser);
6572 if (c_parser_next_token_is (parser, CPP_STRING))
6574 name = c_parser_peek_token (parser)->value;
6575 c_parser_consume_token (parser);
6578 c_parser_error (parser, "expected string literal");
6579 c_parser_skip_to_pragma_eol (parser);
6582 c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name));
6585 /* OpenMP 2.5 parsing routines. */
6587 /* Returns name of the next clause.
6588 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6589 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6590 returned and the token is consumed. */
6592 static pragma_omp_clause
6593 c_parser_omp_clause_name (c_parser *parser)
6595 pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE;
6597 if (c_parser_next_token_is_keyword (parser, RID_IF))
6598 result = PRAGMA_OMP_CLAUSE_IF;
6599 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
6600 result = PRAGMA_OMP_CLAUSE_DEFAULT;
6601 else if (c_parser_next_token_is (parser, CPP_NAME))
6603 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
6608 if (!strcmp ("copyin", p))
6609 result = PRAGMA_OMP_CLAUSE_COPYIN;
6610 else if (!strcmp ("copyprivate", p))
6611 result = PRAGMA_OMP_CLAUSE_COPYPRIVATE;
6614 if (!strcmp ("firstprivate", p))
6615 result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE;
6618 if (!strcmp ("lastprivate", p))
6619 result = PRAGMA_OMP_CLAUSE_LASTPRIVATE;
6622 if (!strcmp ("nowait", p))
6623 result = PRAGMA_OMP_CLAUSE_NOWAIT;
6624 else if (!strcmp ("num_threads", p))
6625 result = PRAGMA_OMP_CLAUSE_NUM_THREADS;
6628 if (!strcmp ("ordered", p))
6629 result = PRAGMA_OMP_CLAUSE_ORDERED;
6632 if (!strcmp ("private", p))
6633 result = PRAGMA_OMP_CLAUSE_PRIVATE;
6636 if (!strcmp ("reduction", p))
6637 result = PRAGMA_OMP_CLAUSE_REDUCTION;
6640 if (!strcmp ("schedule", p))
6641 result = PRAGMA_OMP_CLAUSE_SCHEDULE;
6642 else if (!strcmp ("shared", p))
6643 result = PRAGMA_OMP_CLAUSE_SHARED;
6648 if (result != PRAGMA_OMP_CLAUSE_NONE)
6649 c_parser_consume_token (parser);
6654 /* Validate that a clause of the given type does not already exist. */
6657 check_no_duplicate_clause (tree clauses, enum tree_code code, const char *name)
6661 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
6662 if (OMP_CLAUSE_CODE (c) == code)
6664 error ("too many %qs clauses", name);
6672 variable-list , identifier
6674 If KIND is nonzero, create the appropriate node and install the decl
6675 in OMP_CLAUSE_DECL and add the node to the head of the list.
6677 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6678 return the list created. */
6681 c_parser_omp_variable_list (c_parser *parser, enum omp_clause_code kind,
6684 if (c_parser_next_token_is_not (parser, CPP_NAME)
6685 || c_parser_peek_token (parser)->id_kind != C_ID_ID)
6686 c_parser_error (parser, "expected identifier");
6688 while (c_parser_next_token_is (parser, CPP_NAME)
6689 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
6691 tree t = lookup_name (c_parser_peek_token (parser)->value);
6694 undeclared_variable (c_parser_peek_token (parser)->value,
6695 c_parser_peek_token (parser)->location);
6696 else if (t == error_mark_node)
6700 tree u = build_omp_clause (kind);
6701 OMP_CLAUSE_DECL (u) = t;
6702 OMP_CLAUSE_CHAIN (u) = list;
6706 list = tree_cons (t, NULL_TREE, list);
6708 c_parser_consume_token (parser);
6710 if (c_parser_next_token_is_not (parser, CPP_COMMA))
6713 c_parser_consume_token (parser);
6719 /* Similarly, but expect leading and trailing parenthesis. This is a very
6720 common case for omp clauses. */
6723 c_parser_omp_var_list_parens (c_parser *parser, enum tree_code kind, tree list)
6725 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6727 list = c_parser_omp_variable_list (parser, kind, list);
6728 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6734 copyin ( variable-list ) */
6737 c_parser_omp_clause_copyin (c_parser *parser, tree list)
6739 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYIN, list);
6743 copyprivate ( variable-list ) */
6746 c_parser_omp_clause_copyprivate (c_parser *parser, tree list)
6748 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYPRIVATE, list);
6752 default ( shared | none ) */
6755 c_parser_omp_clause_default (c_parser *parser, tree list)
6757 enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED;
6760 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6762 if (c_parser_next_token_is (parser, CPP_NAME))
6764 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
6769 if (strcmp ("none", p) != 0)
6771 kind = OMP_CLAUSE_DEFAULT_NONE;
6775 if (strcmp ("shared", p) != 0)
6777 kind = OMP_CLAUSE_DEFAULT_SHARED;
6784 c_parser_consume_token (parser);
6789 c_parser_error (parser, "expected %<none%> or %<shared%>");
6791 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6793 if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED)
6796 check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default");
6797 c = build_omp_clause (OMP_CLAUSE_DEFAULT);
6798 OMP_CLAUSE_CHAIN (c) = list;
6799 OMP_CLAUSE_DEFAULT_KIND (c) = kind;
6805 firstprivate ( variable-list ) */
6808 c_parser_omp_clause_firstprivate (c_parser *parser, tree list)
6810 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_FIRSTPRIVATE, list);
6814 if ( expression ) */
6817 c_parser_omp_clause_if (c_parser *parser, tree list)
6819 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6821 tree t = c_parser_paren_condition (parser);
6824 check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if");
6826 c = build_omp_clause (OMP_CLAUSE_IF);
6827 OMP_CLAUSE_IF_EXPR (c) = t;
6828 OMP_CLAUSE_CHAIN (c) = list;
6832 c_parser_error (parser, "expected %<(%>");
6838 lastprivate ( variable-list ) */
6841 c_parser_omp_clause_lastprivate (c_parser *parser, tree list)
6843 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_LASTPRIVATE, list);
6850 c_parser_omp_clause_nowait (c_parser *parser ATTRIBUTE_UNUSED, tree list)
6854 check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait");
6856 c = build_omp_clause (OMP_CLAUSE_NOWAIT);
6857 OMP_CLAUSE_CHAIN (c) = list;
6862 num_threads ( expression ) */
6865 c_parser_omp_clause_num_threads (c_parser *parser, tree list)
6867 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6869 tree c, t = c_parser_expression (parser).value;
6871 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6873 if (!INTEGRAL_TYPE_P (TREE_TYPE (t)))
6875 c_parser_error (parser, "expected integer expression");
6879 /* Attempt to statically determine when the number isn't positive. */
6880 c = fold_build2 (LE_EXPR, boolean_type_node, t,
6881 build_int_cst (TREE_TYPE (t), 0));
6882 if (c == boolean_true_node)
6884 warning (0, "%<num_threads%> value must be positive");
6885 t = integer_one_node;
6888 check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads");
6890 c = build_omp_clause (OMP_CLAUSE_NUM_THREADS);
6891 OMP_CLAUSE_NUM_THREADS_EXPR (c) = t;
6892 OMP_CLAUSE_CHAIN (c) = list;
6903 c_parser_omp_clause_ordered (c_parser *parser ATTRIBUTE_UNUSED, tree list)
6907 check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered");
6909 c = build_omp_clause (OMP_CLAUSE_ORDERED);
6910 OMP_CLAUSE_CHAIN (c) = list;
6915 private ( variable-list ) */
6918 c_parser_omp_clause_private (c_parser *parser, tree list)
6920 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_PRIVATE, list);
6924 reduction ( reduction-operator : variable-list )
6927 One of: + * - & ^ | && || */
6930 c_parser_omp_clause_reduction (c_parser *parser, tree list)
6932 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6934 enum tree_code code;
6936 switch (c_parser_peek_token (parser)->type)
6948 code = BIT_AND_EXPR;
6951 code = BIT_XOR_EXPR;
6954 code = BIT_IOR_EXPR;
6957 code = TRUTH_ANDIF_EXPR;
6960 code = TRUTH_ORIF_EXPR;
6963 c_parser_error (parser,
6964 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
6965 "%<^%>, %<|%>, %<&&%>, or %<||%>");
6966 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
6969 c_parser_consume_token (parser);
6970 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6974 nl = c_parser_omp_variable_list (parser, OMP_CLAUSE_REDUCTION, list);
6975 for (c = nl; c != list; c = OMP_CLAUSE_CHAIN (c))
6976 OMP_CLAUSE_REDUCTION_CODE (c) = code;
6980 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6986 schedule ( schedule-kind )
6987 schedule ( schedule-kind , expression )
6990 static | dynamic | guided | runtime
6994 c_parser_omp_clause_schedule (c_parser *parser, tree list)
6998 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7001 c = build_omp_clause (OMP_CLAUSE_SCHEDULE);
7003 if (c_parser_next_token_is (parser, CPP_NAME))
7005 tree kind = c_parser_peek_token (parser)->value;
7006 const char *p = IDENTIFIER_POINTER (kind);
7011 if (strcmp ("dynamic", p) != 0)
7013 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC;
7017 if (strcmp ("guided", p) != 0)
7019 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED;
7023 if (strcmp ("runtime", p) != 0)
7025 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME;
7032 else if (c_parser_next_token_is_keyword (parser, RID_STATIC))
7033 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC;
7037 c_parser_consume_token (parser);
7038 if (c_parser_next_token_is (parser, CPP_COMMA))
7040 c_parser_consume_token (parser);
7042 t = c_parser_expr_no_commas (parser, NULL).value;
7044 if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME)
7045 error ("schedule %<runtime%> does not take "
7046 "a %<chunk_size%> parameter");
7047 else if (TREE_CODE (TREE_TYPE (t)) == INTEGER_TYPE)
7048 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t;
7050 c_parser_error (parser, "expected integer expression");
7052 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7055 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
7056 "expected %<,%> or %<)%>");
7058 check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule");
7059 OMP_CLAUSE_CHAIN (c) = list;
7063 c_parser_error (parser, "invalid schedule kind");
7064 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
7069 shared ( variable-list ) */
7072 c_parser_omp_clause_shared (c_parser *parser, tree list)
7074 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_SHARED, list);
7077 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7078 is a bitmask in MASK. Return the list of clauses found; the result
7079 of clause default goes in *pdefault. */
7082 c_parser_omp_all_clauses (c_parser *parser, unsigned int mask,
7085 tree clauses = NULL;
7087 while (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7089 const pragma_omp_clause c_kind = c_parser_omp_clause_name (parser);
7091 tree prev = clauses;
7095 case PRAGMA_OMP_CLAUSE_COPYIN:
7096 clauses = c_parser_omp_clause_copyin (parser, clauses);
7099 case PRAGMA_OMP_CLAUSE_COPYPRIVATE:
7100 clauses = c_parser_omp_clause_copyprivate (parser, clauses);
7101 c_name = "copyprivate";
7103 case PRAGMA_OMP_CLAUSE_DEFAULT:
7104 clauses = c_parser_omp_clause_default (parser, clauses);
7107 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE:
7108 clauses = c_parser_omp_clause_firstprivate (parser, clauses);
7109 c_name = "firstprivate";
7111 case PRAGMA_OMP_CLAUSE_IF:
7112 clauses = c_parser_omp_clause_if (parser, clauses);
7115 case PRAGMA_OMP_CLAUSE_LASTPRIVATE:
7116 clauses = c_parser_omp_clause_lastprivate (parser, clauses);
7117 c_name = "lastprivate";
7119 case PRAGMA_OMP_CLAUSE_NOWAIT:
7120 clauses = c_parser_omp_clause_nowait (parser, clauses);
7123 case PRAGMA_OMP_CLAUSE_NUM_THREADS:
7124 clauses = c_parser_omp_clause_num_threads (parser, clauses);
7125 c_name = "num_threads";
7127 case PRAGMA_OMP_CLAUSE_ORDERED:
7128 clauses = c_parser_omp_clause_ordered (parser, clauses);
7131 case PRAGMA_OMP_CLAUSE_PRIVATE:
7132 clauses = c_parser_omp_clause_private (parser, clauses);
7135 case PRAGMA_OMP_CLAUSE_REDUCTION:
7136 clauses = c_parser_omp_clause_reduction (parser, clauses);
7137 c_name = "reduction";
7139 case PRAGMA_OMP_CLAUSE_SCHEDULE:
7140 clauses = c_parser_omp_clause_schedule (parser, clauses);
7141 c_name = "schedule";
7143 case PRAGMA_OMP_CLAUSE_SHARED:
7144 clauses = c_parser_omp_clause_shared (parser, clauses);
7148 c_parser_error (parser, "expected %<#pragma omp%> clause");
7152 if (((mask >> c_kind) & 1) == 0 && !parser->error)
7154 /* Remove the invalid clause(s) from the list to avoid
7155 confusing the rest of the compiler. */
7157 error ("%qs is not valid for %qs", c_name, where);
7162 c_parser_skip_to_pragma_eol (parser);
7164 return c_finish_omp_clauses (clauses);
7171 In practice, we're also interested in adding the statement to an
7172 outer node. So it is convenient if we work around the fact that
7173 c_parser_statement calls add_stmt. */
7176 c_parser_omp_structured_block (c_parser *parser)
7178 tree stmt = push_stmt_list ();
7179 c_parser_statement (parser);
7180 return pop_stmt_list (stmt);
7184 # pragma omp atomic new-line
7188 x binop= expr | x++ | ++x | x-- | --x
7190 +, *, -, /, &, ^, |, <<, >>
7192 where x is an lvalue expression with scalar type. */
7195 c_parser_omp_atomic (c_parser *parser)
7198 enum tree_code code;
7200 c_parser_skip_to_pragma_eol (parser);
7202 lhs = c_parser_unary_expression (parser).value;
7203 switch (TREE_CODE (lhs))
7207 c_parser_skip_to_end_of_block_or_statement (parser);
7210 case PREINCREMENT_EXPR:
7211 case POSTINCREMENT_EXPR:
7212 lhs = TREE_OPERAND (lhs, 0);
7214 rhs = integer_one_node;
7217 case PREDECREMENT_EXPR:
7218 case POSTDECREMENT_EXPR:
7219 lhs = TREE_OPERAND (lhs, 0);
7221 rhs = integer_one_node;
7225 switch (c_parser_peek_token (parser)->type)
7231 code = TRUNC_DIV_EXPR;
7246 code = BIT_AND_EXPR;
7249 code = BIT_IOR_EXPR;
7252 code = BIT_XOR_EXPR;
7255 c_parser_error (parser,
7256 "invalid operator for %<#pragma omp atomic%>");
7260 c_parser_consume_token (parser);
7261 rhs = c_parser_expression (parser).value;
7264 c_finish_omp_atomic (code, lhs, rhs);
7265 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7270 # pragma omp barrier new-line
7274 c_parser_omp_barrier (c_parser *parser)
7276 c_parser_consume_pragma (parser);
7277 c_parser_skip_to_pragma_eol (parser);
7279 c_finish_omp_barrier ();
7283 # pragma omp critical [(name)] new-line
7288 c_parser_omp_critical (c_parser *parser)
7290 tree stmt, name = NULL;
7292 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7294 c_parser_consume_token (parser);
7295 if (c_parser_next_token_is (parser, CPP_NAME))
7297 name = c_parser_peek_token (parser)->value;
7298 c_parser_consume_token (parser);
7299 c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7302 c_parser_error (parser, "expected identifier");
7304 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7305 c_parser_error (parser, "expected %<(%> or end of line");
7306 c_parser_skip_to_pragma_eol (parser);
7308 stmt = c_parser_omp_structured_block (parser);
7309 return c_finish_omp_critical (stmt, name);
7313 # pragma omp flush flush-vars[opt] new-line
7316 ( variable-list ) */
7319 c_parser_omp_flush (c_parser *parser)
7321 c_parser_consume_pragma (parser);
7322 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7323 c_parser_omp_var_list_parens (parser, 0, NULL);
7324 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7325 c_parser_error (parser, "expected %<(%> or end of line");
7326 c_parser_skip_to_pragma_eol (parser);
7328 c_finish_omp_flush ();
7331 /* Parse the restricted form of the for statment allowed by OpenMP.
7332 The real trick here is to determine the loop control variable early
7333 so that we can push a new decl if necessary to make it private. */
7336 c_parser_omp_for_loop (c_parser *parser)
7338 tree decl, cond, incr, save_break, save_cont, body, init;
7341 if (!c_parser_next_token_is_keyword (parser, RID_FOR))
7343 c_parser_error (parser, "for statement expected");
7346 loc = c_parser_peek_token (parser)->location;
7347 c_parser_consume_token (parser);
7349 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7352 /* Parse the initialization declaration or expression. */
7353 if (c_parser_next_token_starts_declspecs (parser))
7355 c_parser_declaration_or_fndef (parser, true, true, true, true);
7356 decl = check_for_loop_decls ();
7361 else if (c_parser_next_token_is (parser, CPP_NAME)
7362 && c_parser_peek_2nd_token (parser)->type == CPP_EQ)
7364 decl = c_parser_postfix_expression (parser).value;
7366 c_parser_require (parser, CPP_EQ, "expected %<=%>");
7368 init = c_parser_expr_no_commas (parser, NULL).value;
7369 init = build_modify_expr (decl, NOP_EXPR, init);
7370 init = c_process_expr_stmt (init);
7372 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7377 /* Parse the loop condition. */
7379 if (c_parser_next_token_is_not (parser, CPP_SEMICOLON))
7381 cond = c_parser_expression_conv (parser).value;
7382 cond = c_objc_common_truthvalue_conversion (cond);
7384 SET_EXPR_LOCATION (cond, input_location);
7386 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7388 /* Parse the increment expression. */
7390 if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN))
7391 incr = c_process_expr_stmt (c_parser_expression (parser).value);
7392 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7395 save_break = c_break_label;
7396 c_break_label = size_one_node;
7397 save_cont = c_cont_label;
7398 c_cont_label = NULL_TREE;
7399 body = push_stmt_list ();
7401 add_stmt (c_parser_c99_block_statement (parser));
7403 add_stmt (build1 (LABEL_EXPR, void_type_node, c_cont_label));
7405 body = pop_stmt_list (body);
7406 c_break_label = save_break;
7407 c_cont_label = save_cont;
7409 /* Only bother calling c_finish_omp_for if we havn't already generated
7410 an error from the initialization parsing. */
7411 if (decl != NULL && decl != error_mark_node && init != error_mark_node)
7412 return c_finish_omp_for (loc, decl, init, cond, incr, body, NULL);
7416 c_parser_error (parser, "expected iteration declaration or initialization");
7417 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7418 decl = init = cond = incr = NULL_TREE;
7423 #pragma omp for for-clause[optseq] new-line
7427 #define OMP_FOR_CLAUSE_MASK \
7428 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7429 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7430 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7431 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7432 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7433 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7434 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7437 c_parser_omp_for (c_parser *parser)
7439 tree block, clauses, ret;
7441 clauses = c_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK,
7444 block = c_begin_compound_stmt (true);
7445 ret = c_parser_omp_for_loop (parser);
7447 OMP_FOR_CLAUSES (ret) = clauses;
7448 block = c_end_compound_stmt (block, true);
7455 # pragma omp master new-line
7460 c_parser_omp_master (c_parser *parser)
7462 c_parser_skip_to_pragma_eol (parser);
7463 return c_finish_omp_master (c_parser_omp_structured_block (parser));
7467 # pragma omp ordered new-line
7472 c_parser_omp_ordered (c_parser *parser)
7474 c_parser_skip_to_pragma_eol (parser);
7475 return c_finish_omp_ordered (c_parser_omp_structured_block (parser));
7481 { section-sequence }
7484 section-directive[opt] structured-block
7485 section-sequence section-directive structured-block */
7488 c_parser_omp_sections_scope (c_parser *parser)
7491 bool error_suppress = false;
7494 if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
7496 /* Avoid skipping until the end of the block. */
7497 parser->error = false;
7501 stmt = push_stmt_list ();
7503 loc = c_parser_peek_token (parser)->location;
7504 if (c_parser_peek_token (parser)->pragma_kind != PRAGMA_OMP_SECTION)
7506 substmt = push_stmt_list ();
7510 c_parser_statement (parser);
7512 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
7514 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7516 if (c_parser_next_token_is (parser, CPP_EOF))
7520 substmt = pop_stmt_list (substmt);
7521 substmt = build1 (OMP_SECTION, void_type_node, substmt);
7522 SET_EXPR_LOCATION (substmt, loc);
7528 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7530 if (c_parser_next_token_is (parser, CPP_EOF))
7533 loc = c_parser_peek_token (parser)->location;
7534 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
7536 c_parser_consume_pragma (parser);
7537 c_parser_skip_to_pragma_eol (parser);
7538 error_suppress = false;
7540 else if (!error_suppress)
7542 error ("expected %<#pragma omp section%> or %<}%>");
7543 error_suppress = true;
7546 substmt = c_parser_omp_structured_block (parser);
7547 substmt = build1 (OMP_SECTION, void_type_node, substmt);
7548 SET_EXPR_LOCATION (substmt, loc);
7551 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE,
7552 "expected %<#pragma omp section%> or %<}%>");
7554 substmt = pop_stmt_list (stmt);
7556 stmt = make_node (OMP_SECTIONS);
7557 TREE_TYPE (stmt) = void_type_node;
7558 OMP_SECTIONS_BODY (stmt) = substmt;
7560 return add_stmt (stmt);
7564 # pragma omp sections sections-clause[optseq] newline
7568 #define OMP_SECTIONS_CLAUSE_MASK \
7569 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7570 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7571 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7572 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7573 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7576 c_parser_omp_sections (c_parser *parser)
7578 tree block, clauses, ret;
7580 clauses = c_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK,
7581 "#pragma omp sections");
7583 block = c_begin_compound_stmt (true);
7584 ret = c_parser_omp_sections_scope (parser);
7586 OMP_SECTIONS_CLAUSES (ret) = clauses;
7587 block = c_end_compound_stmt (block, true);
7594 # pragma parallel parallel-clause new-line
7595 # pragma parallel for parallel-for-clause new-line
7596 # pragma parallel sections parallel-sections-clause new-line
7599 #define OMP_PARALLEL_CLAUSE_MASK \
7600 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
7601 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7602 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7603 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
7604 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
7605 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
7606 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7607 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
7610 c_parser_omp_parallel (c_parser *parser)
7612 enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL;
7613 const char *p_name = "#pragma omp parallel";
7614 tree stmt, clauses, par_clause, ws_clause, block;
7615 unsigned int mask = OMP_PARALLEL_CLAUSE_MASK;
7617 if (c_parser_next_token_is_keyword (parser, RID_FOR))
7619 c_parser_consume_token (parser);
7620 p_kind = PRAGMA_OMP_PARALLEL_FOR;
7621 p_name = "#pragma omp parallel for";
7622 mask |= OMP_FOR_CLAUSE_MASK;
7623 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
7625 else if (c_parser_next_token_is (parser, CPP_NAME))
7627 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
7628 if (strcmp (p, "sections") == 0)
7630 c_parser_consume_token (parser);
7631 p_kind = PRAGMA_OMP_PARALLEL_SECTIONS;
7632 p_name = "#pragma omp parallel sections";
7633 mask |= OMP_SECTIONS_CLAUSE_MASK;
7634 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
7638 clauses = c_parser_omp_all_clauses (parser, mask, p_name);
7642 case PRAGMA_OMP_PARALLEL:
7643 block = c_begin_omp_parallel ();
7644 c_parser_statement (parser);
7645 stmt = c_finish_omp_parallel (clauses, block);
7648 case PRAGMA_OMP_PARALLEL_FOR:
7649 block = c_begin_omp_parallel ();
7650 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
7651 stmt = c_parser_omp_for_loop (parser);
7653 OMP_FOR_CLAUSES (stmt) = ws_clause;
7654 stmt = c_finish_omp_parallel (par_clause, block);
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);
7674 # pragma omp single single-clause[optseq] new-line
7678 #define OMP_SINGLE_CLAUSE_MASK \
7679 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7680 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7681 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
7682 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7685 c_parser_omp_single (c_parser *parser)
7687 tree stmt = make_node (OMP_SINGLE);
7688 TREE_TYPE (stmt) = void_type_node;
7690 OMP_SINGLE_CLAUSES (stmt)
7691 = c_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK,
7692 "#pragma omp single");
7693 OMP_SINGLE_BODY (stmt) = c_parser_omp_structured_block (parser);
7695 return add_stmt (stmt);
7699 /* Main entry point to parsing most OpenMP pragmas. */
7702 c_parser_omp_construct (c_parser *parser)
7704 enum pragma_kind p_kind;
7708 loc = c_parser_peek_token (parser)->location;
7709 p_kind = c_parser_peek_token (parser)->pragma_kind;
7710 c_parser_consume_pragma (parser);
7714 case PRAGMA_OMP_ATOMIC:
7715 c_parser_omp_atomic (parser);
7717 case PRAGMA_OMP_CRITICAL:
7718 stmt = c_parser_omp_critical (parser);
7720 case PRAGMA_OMP_FOR:
7721 stmt = c_parser_omp_for (parser);
7723 case PRAGMA_OMP_MASTER:
7724 stmt = c_parser_omp_master (parser);
7726 case PRAGMA_OMP_ORDERED:
7727 stmt = c_parser_omp_ordered (parser);
7729 case PRAGMA_OMP_PARALLEL:
7730 stmt = c_parser_omp_parallel (parser);
7732 case PRAGMA_OMP_SECTIONS:
7733 stmt = c_parser_omp_sections (parser);
7735 case PRAGMA_OMP_SINGLE:
7736 stmt = c_parser_omp_single (parser);
7743 SET_EXPR_LOCATION (stmt, loc);
7748 # pragma omp threadprivate (variable-list) */
7751 c_parser_omp_threadprivate (c_parser *parser)
7755 c_parser_consume_pragma (parser);
7756 vars = c_parser_omp_var_list_parens (parser, 0, NULL);
7758 if (!targetm.have_tls)
7759 sorry ("threadprivate variables not supported in this target");
7761 /* Mark every variable in VARS to be assigned thread local storage. */
7762 for (t = vars; t; t = TREE_CHAIN (t))
7764 tree v = TREE_PURPOSE (t);
7766 /* If V had already been marked threadprivate, it doesn't matter
7767 whether it had been used prior to this point. */
7768 if (TREE_USED (v) && !C_DECL_THREADPRIVATE_P (v))
7769 error ("%qE declared %<threadprivate%> after first use", v);
7770 else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v))
7771 error ("automatic variable %qE cannot be %<threadprivate%>", v);
7772 else if (! COMPLETE_TYPE_P (TREE_TYPE (v)))
7773 error ("%<threadprivate%> %qE has incomplete type", v);
7776 if (! DECL_THREAD_LOCAL_P (v))
7778 DECL_TLS_MODEL (v) = decl_default_tls_model (v);
7779 /* If rtl has been already set for this var, call
7780 make_decl_rtl once again, so that encode_section_info
7781 has a chance to look at the new decl flags. */
7782 if (DECL_RTL_SET_P (v))
7785 C_DECL_THREADPRIVATE_P (v) = 1;
7789 c_parser_skip_to_pragma_eol (parser);
7793 /* Parse a single source file. */
7798 /* Use local storage to begin. If the first token is a pragma, parse it.
7799 If it is #pragma GCC pch_preprocess, then this will load a PCH file
7800 which will cause garbage collection. */
7803 memset (&tparser, 0, sizeof tparser);
7804 the_parser = &tparser;
7806 if (c_parser_peek_token (&tparser)->pragma_kind == PRAGMA_GCC_PCH_PREPROCESS)
7807 c_parser_pragma_pch_preprocess (&tparser);
7809 the_parser = GGC_NEW (c_parser);
7810 *the_parser = tparser;
7812 c_parser_translation_unit (the_parser);
7816 #include "gt-c-parser.h"