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, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 Parser actions based on the old Bison parser; structure somewhat
7 influenced by and fragments based on the C++ parser.
9 This file is part of GCC.
11 GCC is free software; you can redistribute it and/or modify it under
12 the terms of the GNU General Public License as published by the Free
13 Software Foundation; either version 3, or (at your option) any later
16 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
17 WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 You should have received a copy of the GNU General Public License
22 along with GCC; see the file COPYING3. If not see
23 <http://www.gnu.org/licenses/>. */
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 /* Initialization routine for this file. */
67 /* The only initialization required is of the reserved word
78 mask |= D_ASM | D_EXT;
82 if (!c_dialect_objc ())
83 mask |= D_OBJC | D_CXX_OBJC;
85 ridpointers = GGC_CNEWVEC (tree, (int) RID_MAX);
86 for (i = 0; i < num_c_common_reswords; i++)
88 /* If a keyword is disabled, do not enter it into the table
89 and so create a canonical spelling that isn't a keyword. */
90 if (c_common_reswords[i].disable & mask)
93 && (c_common_reswords[i].disable & D_CXXWARN))
95 id = get_identifier (c_common_reswords[i].word);
96 C_SET_RID_CODE (id, RID_CXX_COMPAT_WARN);
97 C_IS_RESERVED_WORD (id) = 1;
102 id = get_identifier (c_common_reswords[i].word);
103 C_SET_RID_CODE (id, c_common_reswords[i].rid);
104 C_IS_RESERVED_WORD (id) = 1;
105 ridpointers [(int) c_common_reswords[i].rid] = id;
109 /* The C lexer intermediates between the lexer in cpplib and c-lex.c
110 and the C parser. Unlike the C++ lexer, the parser structure
111 stores the lexer information instead of using a separate structure.
112 Identifiers are separated into ordinary identifiers, type names,
113 keywords and some other Objective-C types of identifiers, and some
114 look-ahead is maintained.
116 ??? It might be a good idea to lex the whole file up front (as for
117 C++). It would then be possible to share more of the C and C++
118 lexer code, if desired. */
120 /* The following local token type is used. */
123 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
125 /* More information about the type of a CPP_NAME token. */
126 typedef enum c_id_kind {
127 /* An ordinary identifier. */
129 /* An identifier declared as a typedef name. */
131 /* An identifier declared as an Objective-C class name. */
133 /* Not an identifier. */
137 /* A single C token after string literal concatenation and conversion
138 of preprocessing tokens to tokens. */
139 typedef struct c_token GTY (())
141 /* The kind of token. */
142 ENUM_BITFIELD (cpp_ttype) type : 8;
143 /* If this token is a CPP_NAME, this value indicates whether also
144 declared as some kind of type. Otherwise, it is C_ID_NONE. */
145 ENUM_BITFIELD (c_id_kind) id_kind : 8;
146 /* If this token is a keyword, this value indicates which keyword.
147 Otherwise, this value is RID_MAX. */
148 ENUM_BITFIELD (rid) keyword : 8;
149 /* If this token is a CPP_PRAGMA, this indicates the pragma that
150 was seen. Otherwise it is PRAGMA_NONE. */
151 ENUM_BITFIELD (pragma_kind) pragma_kind : 8;
152 /* The value associated with this token, if any. */
154 /* The location at which this token was found. */
158 /* A parser structure recording information about the state and
159 context of parsing. Includes lexer information with up to two
160 tokens of look-ahead; more are not needed for C. */
161 typedef struct c_parser GTY(())
163 /* The look-ahead tokens. */
165 /* How many look-ahead tokens are available (0, 1 or 2). */
167 /* True if a syntax error is being recovered from; false otherwise.
168 c_parser_error sets this flag. It should clear this flag when
169 enough tokens have been consumed to recover from the error. */
170 BOOL_BITFIELD error : 1;
171 /* True if we're processing a pragma, and shouldn't automatically
172 consume CPP_PRAGMA_EOL. */
173 BOOL_BITFIELD in_pragma : 1;
174 /* True if we're parsing the outermost block of an if statement. */
175 BOOL_BITFIELD in_if_block : 1;
176 /* True if we want to lex an untranslated string. */
177 BOOL_BITFIELD lex_untranslated_string : 1;
178 /* Objective-C specific parser/lexer information. */
179 BOOL_BITFIELD objc_pq_context : 1;
180 /* The following flag is needed to contextualize Objective-C lexical
181 analysis. In some cases (e.g., 'int NSObject;'), it is
182 undesirable to bind an identifier to an Objective-C class, even
183 if a class with that name exists. */
184 BOOL_BITFIELD objc_need_raw_identifier : 1;
188 /* The actual parser and external interface. ??? Does this need to be
189 garbage-collected? */
191 static GTY (()) c_parser *the_parser;
194 /* Read in and lex a single token, storing it in *TOKEN. */
197 c_lex_one_token (c_parser *parser, c_token *token)
199 timevar_push (TV_LEX);
201 token->type = c_lex_with_flags (&token->value, &token->location, NULL,
202 (parser->lex_untranslated_string
203 ? C_LEX_STRING_NO_TRANSLATE : 0));
204 token->id_kind = C_ID_NONE;
205 token->keyword = RID_MAX;
206 token->pragma_kind = PRAGMA_NONE;
214 bool objc_force_identifier = parser->objc_need_raw_identifier;
215 if (c_dialect_objc ())
216 parser->objc_need_raw_identifier = false;
218 if (C_IS_RESERVED_WORD (token->value))
220 enum rid rid_code = C_RID_CODE (token->value);
222 if (rid_code == RID_CXX_COMPAT_WARN)
224 warning_at (token->location,
226 "identifier %qs conflicts with C++ keyword",
227 IDENTIFIER_POINTER (token->value));
229 else if (c_dialect_objc ())
231 if (!objc_is_reserved_word (token->value)
232 && (!OBJC_IS_PQ_KEYWORD (rid_code)
233 || parser->objc_pq_context))
235 /* Return the canonical spelling for this keyword. */
236 token->value = ridpointers[(int) rid_code];
237 token->type = CPP_KEYWORD;
238 token->keyword = rid_code;
244 token->type = CPP_KEYWORD;
245 token->keyword = rid_code;
250 decl = lookup_name (token->value);
253 if (TREE_CODE (decl) == TYPE_DECL)
255 token->id_kind = C_ID_TYPENAME;
259 else if (c_dialect_objc ())
261 tree objc_interface_decl = objc_is_class_name (token->value);
262 /* Objective-C class names are in the same namespace as
263 variables and typedefs, and hence are shadowed by local
265 if (objc_interface_decl
266 && (global_bindings_p ()
267 || (!objc_force_identifier && !decl)))
269 token->value = objc_interface_decl;
270 token->id_kind = C_ID_CLASSNAME;
274 token->id_kind = C_ID_ID;
278 /* This only happens in Objective-C; it must be a keyword. */
279 token->type = CPP_KEYWORD;
280 token->keyword = C_RID_CODE (token->value);
284 case CPP_CLOSE_PAREN:
286 /* These tokens may affect the interpretation of any identifiers
287 following, if doing Objective-C. */
288 if (c_dialect_objc ())
289 parser->objc_need_raw_identifier = false;
292 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
293 token->pragma_kind = (enum pragma_kind) TREE_INT_CST_LOW (token->value);
299 timevar_pop (TV_LEX);
302 /* Return a pointer to the next token from PARSER, reading it in if
305 static inline c_token *
306 c_parser_peek_token (c_parser *parser)
308 if (parser->tokens_avail == 0)
310 c_lex_one_token (parser, &parser->tokens[0]);
311 parser->tokens_avail = 1;
313 return &parser->tokens[0];
316 /* Return true if the next token from PARSER has the indicated
320 c_parser_next_token_is (c_parser *parser, enum cpp_ttype type)
322 return c_parser_peek_token (parser)->type == type;
325 /* Return true if the next token from PARSER does not have the
329 c_parser_next_token_is_not (c_parser *parser, enum cpp_ttype type)
331 return !c_parser_next_token_is (parser, type);
334 /* Return true if the next token from PARSER is the indicated
338 c_parser_next_token_is_keyword (c_parser *parser, enum rid keyword)
340 return c_parser_peek_token (parser)->keyword == keyword;
343 /* Return true if TOKEN can start a type name,
346 c_token_starts_typename (c_token *token)
351 switch (token->id_kind)
358 gcc_assert (c_dialect_objc ());
364 switch (token->keyword)
396 if (c_dialect_objc ())
404 /* Return true if the next token from PARSER can start a type name,
407 c_parser_next_token_starts_typename (c_parser *parser)
409 c_token *token = c_parser_peek_token (parser);
410 return c_token_starts_typename (token);
413 /* Return true if TOKEN can start declaration specifiers, false
416 c_token_starts_declspecs (c_token *token)
421 switch (token->id_kind)
428 gcc_assert (c_dialect_objc ());
434 switch (token->keyword)
473 if (c_dialect_objc ())
481 /* Return true if the next token from PARSER can start declaration
482 specifiers, false otherwise. */
484 c_parser_next_token_starts_declspecs (c_parser *parser)
486 c_token *token = c_parser_peek_token (parser);
487 return c_token_starts_declspecs (token);
490 /* Return a pointer to the next-but-one token from PARSER, reading it
491 in if necessary. The next token is already read in. */
494 c_parser_peek_2nd_token (c_parser *parser)
496 if (parser->tokens_avail >= 2)
497 return &parser->tokens[1];
498 gcc_assert (parser->tokens_avail == 1);
499 gcc_assert (parser->tokens[0].type != CPP_EOF);
500 gcc_assert (parser->tokens[0].type != CPP_PRAGMA_EOL);
501 c_lex_one_token (parser, &parser->tokens[1]);
502 parser->tokens_avail = 2;
503 return &parser->tokens[1];
506 /* Consume the next token from PARSER. */
509 c_parser_consume_token (c_parser *parser)
511 gcc_assert (parser->tokens_avail >= 1);
512 gcc_assert (parser->tokens[0].type != CPP_EOF);
513 gcc_assert (!parser->in_pragma || parser->tokens[0].type != CPP_PRAGMA_EOL);
514 gcc_assert (parser->error || parser->tokens[0].type != CPP_PRAGMA);
515 if (parser->tokens_avail == 2)
516 parser->tokens[0] = parser->tokens[1];
517 parser->tokens_avail--;
520 /* Expect the current token to be a #pragma. Consume it and remember
521 that we've begun parsing a pragma. */
524 c_parser_consume_pragma (c_parser *parser)
526 gcc_assert (!parser->in_pragma);
527 gcc_assert (parser->tokens_avail >= 1);
528 gcc_assert (parser->tokens[0].type == CPP_PRAGMA);
529 if (parser->tokens_avail == 2)
530 parser->tokens[0] = parser->tokens[1];
531 parser->tokens_avail--;
532 parser->in_pragma = true;
535 /* Update the globals input_location and in_system_header from
538 c_parser_set_source_position_from_token (c_token *token)
540 if (token->type != CPP_EOF)
542 input_location = token->location;
546 /* Issue a diagnostic of the form
547 FILE:LINE: MESSAGE before TOKEN
548 where TOKEN is the next token in the input stream of PARSER.
549 MESSAGE (specified by the caller) is usually of the form "expected
552 Do not issue a diagnostic if still recovering from an error.
554 ??? This is taken from the C++ parser, but building up messages in
555 this way is not i18n-friendly and some other approach should be
559 c_parser_error (c_parser *parser, const char *gmsgid)
561 c_token *token = c_parser_peek_token (parser);
564 parser->error = true;
567 /* This diagnostic makes more sense if it is tagged to the line of
568 the token we just peeked at. */
569 c_parser_set_source_position_from_token (token);
570 c_parse_error (gmsgid,
571 /* Because c_parse_error does not understand
572 CPP_KEYWORD, keywords are treated like
574 (token->type == CPP_KEYWORD ? CPP_NAME : token->type),
578 /* If the next token is of the indicated TYPE, consume it. Otherwise,
579 issue the error MSGID. If MSGID is NULL then a message has already
580 been produced and no message will be produced this time. Returns
581 true if found, false otherwise. */
584 c_parser_require (c_parser *parser,
588 if (c_parser_next_token_is (parser, type))
590 c_parser_consume_token (parser);
595 c_parser_error (parser, msgid);
600 /* If the next token is the indicated keyword, consume it. Otherwise,
601 issue the error MSGID. Returns true if found, false otherwise. */
604 c_parser_require_keyword (c_parser *parser,
608 if (c_parser_next_token_is_keyword (parser, keyword))
610 c_parser_consume_token (parser);
615 c_parser_error (parser, msgid);
620 /* Like c_parser_require, except that tokens will be skipped until the
621 desired token is found. An error message is still produced if the
622 next token is not as expected. If MSGID is NULL then a message has
623 already been produced and no message will be produced this
627 c_parser_skip_until_found (c_parser *parser,
631 unsigned nesting_depth = 0;
633 if (c_parser_require (parser, type, msgid))
636 /* Skip tokens until the desired token is found. */
639 /* Peek at the next token. */
640 c_token *token = c_parser_peek_token (parser);
641 /* If we've reached the token we want, consume it and stop. */
642 if (token->type == type && !nesting_depth)
644 c_parser_consume_token (parser);
648 /* If we've run out of tokens, stop. */
649 if (token->type == CPP_EOF)
651 if (token->type == CPP_PRAGMA_EOL && parser->in_pragma)
653 if (token->type == CPP_OPEN_BRACE
654 || token->type == CPP_OPEN_PAREN
655 || token->type == CPP_OPEN_SQUARE)
657 else if (token->type == CPP_CLOSE_BRACE
658 || token->type == CPP_CLOSE_PAREN
659 || token->type == CPP_CLOSE_SQUARE)
661 if (nesting_depth-- == 0)
664 /* Consume this token. */
665 c_parser_consume_token (parser);
667 parser->error = false;
670 /* Skip tokens until the end of a parameter is found, but do not
671 consume the comma, semicolon or closing delimiter. */
674 c_parser_skip_to_end_of_parameter (c_parser *parser)
676 unsigned nesting_depth = 0;
680 c_token *token = c_parser_peek_token (parser);
681 if ((token->type == CPP_COMMA || token->type == CPP_SEMICOLON)
684 /* If we've run out of tokens, stop. */
685 if (token->type == CPP_EOF)
687 if (token->type == CPP_PRAGMA_EOL && parser->in_pragma)
689 if (token->type == CPP_OPEN_BRACE
690 || token->type == CPP_OPEN_PAREN
691 || token->type == CPP_OPEN_SQUARE)
693 else if (token->type == CPP_CLOSE_BRACE
694 || token->type == CPP_CLOSE_PAREN
695 || token->type == CPP_CLOSE_SQUARE)
697 if (nesting_depth-- == 0)
700 /* Consume this token. */
701 c_parser_consume_token (parser);
703 parser->error = false;
706 /* Expect to be at the end of the pragma directive and consume an
707 end of line marker. */
710 c_parser_skip_to_pragma_eol (c_parser *parser)
712 gcc_assert (parser->in_pragma);
713 parser->in_pragma = false;
715 if (!c_parser_require (parser, CPP_PRAGMA_EOL, "expected end of line"))
718 c_token *token = c_parser_peek_token (parser);
719 if (token->type == CPP_EOF)
721 if (token->type == CPP_PRAGMA_EOL)
723 c_parser_consume_token (parser);
726 c_parser_consume_token (parser);
729 parser->error = false;
732 /* Skip tokens until we have consumed an entire block, or until we
733 have consumed a non-nested ';'. */
736 c_parser_skip_to_end_of_block_or_statement (c_parser *parser)
738 unsigned nesting_depth = 0;
739 bool save_error = parser->error;
745 /* Peek at the next token. */
746 token = c_parser_peek_token (parser);
754 if (parser->in_pragma)
759 /* If the next token is a ';', we have reached the
760 end of the statement. */
763 /* Consume the ';'. */
764 c_parser_consume_token (parser);
769 case CPP_CLOSE_BRACE:
770 /* If the next token is a non-nested '}', then we have
771 reached the end of the current block. */
772 if (nesting_depth == 0 || --nesting_depth == 0)
774 c_parser_consume_token (parser);
780 /* If it the next token is a '{', then we are entering a new
781 block. Consume the entire block. */
786 /* If we see a pragma, consume the whole thing at once. We
787 have some safeguards against consuming pragmas willy-nilly.
788 Normally, we'd expect to be here with parser->error set,
789 which disables these safeguards. But it's possible to get
790 here for secondary error recovery, after parser->error has
792 c_parser_consume_pragma (parser);
793 c_parser_skip_to_pragma_eol (parser);
794 parser->error = save_error;
801 c_parser_consume_token (parser);
805 parser->error = false;
808 /* CPP's options (initialized by c-opts.c). */
809 extern cpp_options *cpp_opts;
811 /* Save the warning flags which are controlled by __extension__. */
814 disable_extension_diagnostics (void)
817 | (warn_pointer_arith << 1)
818 | (warn_traditional << 2)
820 | (warn_long_long << 4)
821 | (cpp_opts->warn_long_long << 5));
822 cpp_opts->pedantic = pedantic = 0;
823 warn_pointer_arith = 0;
824 cpp_opts->warn_traditional = warn_traditional = 0;
827 cpp_opts->warn_long_long = 0;
831 /* Restore the warning flags which are controlled by __extension__.
832 FLAGS is the return value from disable_extension_diagnostics. */
835 restore_extension_diagnostics (int flags)
837 cpp_opts->pedantic = pedantic = flags & 1;
838 warn_pointer_arith = (flags >> 1) & 1;
839 cpp_opts->warn_traditional = warn_traditional = (flags >> 2) & 1;
840 flag_iso = (flags >> 3) & 1;
841 warn_long_long = (flags >> 4) & 1;
842 cpp_opts->warn_long_long = (flags >> 5) & 1;
845 /* Possibly kinds of declarator to parse. */
846 typedef enum c_dtr_syn {
847 /* A normal declarator with an identifier. */
849 /* An abstract declarator (maybe empty). */
851 /* A parameter declarator: may be either, but after a type name does
852 not redeclare a typedef name as an identifier if it can
853 alternatively be interpreted as a typedef name; see DR#009,
854 applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
855 following DR#249. For example, given a typedef T, "int T" and
856 "int *T" are valid parameter declarations redeclaring T, while
857 "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
858 abstract declarators rather than involving redundant parentheses;
859 the same applies with attributes inside the parentheses before
864 static void c_parser_external_declaration (c_parser *);
865 static void c_parser_asm_definition (c_parser *);
866 static void c_parser_declaration_or_fndef (c_parser *, bool, bool, bool, bool);
867 static void c_parser_declspecs (c_parser *, struct c_declspecs *, bool, bool,
869 static struct c_typespec c_parser_enum_specifier (c_parser *);
870 static struct c_typespec c_parser_struct_or_union_specifier (c_parser *);
871 static tree c_parser_struct_declaration (c_parser *);
872 static struct c_typespec c_parser_typeof_specifier (c_parser *);
873 static struct c_declarator *c_parser_declarator (c_parser *, bool, c_dtr_syn,
875 static struct c_declarator *c_parser_direct_declarator (c_parser *, bool,
877 static struct c_declarator *c_parser_direct_declarator_inner (c_parser *,
879 struct c_declarator *);
880 static struct c_arg_info *c_parser_parms_declarator (c_parser *, bool, tree);
881 static struct c_arg_info *c_parser_parms_list_declarator (c_parser *, tree);
882 static struct c_parm *c_parser_parameter_declaration (c_parser *, tree);
883 static tree c_parser_simple_asm_expr (c_parser *);
884 static tree c_parser_attributes (c_parser *);
885 static struct c_type_name *c_parser_type_name (c_parser *);
886 static struct c_expr c_parser_initializer (c_parser *);
887 static struct c_expr c_parser_braced_init (c_parser *, tree, bool);
888 static void c_parser_initelt (c_parser *);
889 static void c_parser_initval (c_parser *, struct c_expr *);
890 static tree c_parser_compound_statement (c_parser *);
891 static void c_parser_compound_statement_nostart (c_parser *);
892 static void c_parser_label (c_parser *);
893 static void c_parser_statement (c_parser *);
894 static void c_parser_statement_after_labels (c_parser *);
895 static void c_parser_if_statement (c_parser *);
896 static void c_parser_switch_statement (c_parser *);
897 static void c_parser_while_statement (c_parser *);
898 static void c_parser_do_statement (c_parser *);
899 static void c_parser_for_statement (c_parser *);
900 static tree c_parser_asm_statement (c_parser *);
901 static tree c_parser_asm_operands (c_parser *, bool);
902 static tree c_parser_asm_clobbers (c_parser *);
903 static struct c_expr c_parser_expr_no_commas (c_parser *, struct c_expr *);
904 static struct c_expr c_parser_conditional_expression (c_parser *,
906 static struct c_expr c_parser_binary_expression (c_parser *, struct c_expr *);
907 static struct c_expr c_parser_cast_expression (c_parser *, struct c_expr *);
908 static struct c_expr c_parser_unary_expression (c_parser *);
909 static struct c_expr c_parser_sizeof_expression (c_parser *);
910 static struct c_expr c_parser_alignof_expression (c_parser *);
911 static struct c_expr c_parser_postfix_expression (c_parser *);
912 static struct c_expr c_parser_postfix_expression_after_paren_type (c_parser *,
913 struct c_type_name *);
914 static struct c_expr c_parser_postfix_expression_after_primary (c_parser *,
916 static struct c_expr c_parser_expression (c_parser *);
917 static struct c_expr c_parser_expression_conv (c_parser *);
918 static tree c_parser_expr_list (c_parser *, bool);
919 static void c_parser_omp_construct (c_parser *);
920 static void c_parser_omp_threadprivate (c_parser *);
921 static void c_parser_omp_barrier (c_parser *);
922 static void c_parser_omp_flush (c_parser *);
923 static void c_parser_omp_taskwait (c_parser *);
925 enum pragma_context { pragma_external, pragma_stmt, pragma_compound };
926 static bool c_parser_pragma (c_parser *, enum pragma_context);
928 /* These Objective-C parser functions are only ever called when
929 compiling Objective-C. */
930 static void c_parser_objc_class_definition (c_parser *);
931 static void c_parser_objc_class_instance_variables (c_parser *);
932 static void c_parser_objc_class_declaration (c_parser *);
933 static void c_parser_objc_alias_declaration (c_parser *);
934 static void c_parser_objc_protocol_definition (c_parser *);
935 static enum tree_code c_parser_objc_method_type (c_parser *);
936 static void c_parser_objc_method_definition (c_parser *);
937 static void c_parser_objc_methodprotolist (c_parser *);
938 static void c_parser_objc_methodproto (c_parser *);
939 static tree c_parser_objc_method_decl (c_parser *);
940 static tree c_parser_objc_type_name (c_parser *);
941 static tree c_parser_objc_protocol_refs (c_parser *);
942 static void c_parser_objc_try_catch_statement (c_parser *);
943 static void c_parser_objc_synchronized_statement (c_parser *);
944 static tree c_parser_objc_selector (c_parser *);
945 static tree c_parser_objc_selector_arg (c_parser *);
946 static tree c_parser_objc_receiver (c_parser *);
947 static tree c_parser_objc_message_args (c_parser *);
948 static tree c_parser_objc_keywordexpr (c_parser *);
950 /* Parse a translation unit (C90 6.7, C99 6.9).
953 external-declarations
955 external-declarations:
957 external-declarations external-declaration
966 c_parser_translation_unit (c_parser *parser)
968 if (c_parser_next_token_is (parser, CPP_EOF))
970 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
971 "ISO C forbids an empty translation unit");
975 void *obstack_position = obstack_alloc (&parser_obstack, 0);
979 c_parser_external_declaration (parser);
980 obstack_free (&parser_obstack, obstack_position);
982 while (c_parser_next_token_is_not (parser, CPP_EOF));
986 /* Parse an external declaration (C90 6.7, C99 6.9).
988 external-declaration:
994 external-declaration:
997 __extension__ external-declaration
1001 external-declaration:
1002 objc-class-definition
1003 objc-class-declaration
1004 objc-alias-declaration
1005 objc-protocol-definition
1006 objc-method-definition
1011 c_parser_external_declaration (c_parser *parser)
1014 switch (c_parser_peek_token (parser)->type)
1017 switch (c_parser_peek_token (parser)->keyword)
1020 ext = disable_extension_diagnostics ();
1021 c_parser_consume_token (parser);
1022 c_parser_external_declaration (parser);
1023 restore_extension_diagnostics (ext);
1026 c_parser_asm_definition (parser);
1028 case RID_AT_INTERFACE:
1029 case RID_AT_IMPLEMENTATION:
1030 gcc_assert (c_dialect_objc ());
1031 c_parser_objc_class_definition (parser);
1034 gcc_assert (c_dialect_objc ());
1035 c_parser_objc_class_declaration (parser);
1038 gcc_assert (c_dialect_objc ());
1039 c_parser_objc_alias_declaration (parser);
1041 case RID_AT_PROTOCOL:
1042 gcc_assert (c_dialect_objc ());
1043 c_parser_objc_protocol_definition (parser);
1046 gcc_assert (c_dialect_objc ());
1047 c_parser_consume_token (parser);
1048 objc_finish_implementation ();
1055 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
1056 "ISO C does not allow extra %<;%> outside of a function");
1057 c_parser_consume_token (parser);
1060 c_parser_pragma (parser, pragma_external);
1064 if (c_dialect_objc ())
1066 c_parser_objc_method_definition (parser);
1069 /* Else fall through, and yield a syntax error trying to parse
1070 as a declaration or function definition. */
1073 /* A declaration or a function definition. We can only tell
1074 which after parsing the declaration specifiers, if any, and
1075 the first declarator. */
1076 c_parser_declaration_or_fndef (parser, true, true, false, true);
1082 /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99
1083 6.7, 6.9.1). If FNDEF_OK is true, a function definition is
1084 accepted; otherwise (old-style parameter declarations) only other
1085 declarations are accepted. If NESTED is true, we are inside a
1086 function or parsing old-style parameter declarations; any functions
1087 encountered are nested functions and declaration specifiers are
1088 required; otherwise we are at top level and functions are normal
1089 functions and declaration specifiers may be optional. If EMPTY_OK
1090 is true, empty declarations are OK (subject to all other
1091 constraints); otherwise (old-style parameter declarations) they are
1092 diagnosed. If START_ATTR_OK is true, the declaration specifiers
1093 may start with attributes; otherwise they may not.
1096 declaration-specifiers init-declarator-list[opt] ;
1098 function-definition:
1099 declaration-specifiers[opt] declarator declaration-list[opt]
1104 declaration-list declaration
1106 init-declarator-list:
1108 init-declarator-list , init-declarator
1111 declarator simple-asm-expr[opt] attributes[opt]
1112 declarator simple-asm-expr[opt] attributes[opt] = initializer
1116 nested-function-definition:
1117 declaration-specifiers declarator declaration-list[opt]
1120 The simple-asm-expr and attributes are GNU extensions.
1122 This function does not handle __extension__; that is handled in its
1123 callers. ??? Following the old parser, __extension__ may start
1124 external declarations, declarations in functions and declarations
1125 at the start of "for" loops, but not old-style parameter
1128 C99 requires declaration specifiers in a function definition; the
1129 absence is diagnosed through the diagnosis of implicit int. In GNU
1130 C we also allow but diagnose declarations without declaration
1131 specifiers, but only at top level (elsewhere they conflict with
1137 threadprivate-directive */
1140 c_parser_declaration_or_fndef (c_parser *parser, bool fndef_ok, bool empty_ok,
1141 bool nested, bool start_attr_ok)
1143 struct c_declspecs *specs;
1145 tree all_prefix_attrs;
1146 bool diagnosed_no_specs = false;
1147 location_t here = c_parser_peek_token (parser)->location;
1149 specs = build_null_declspecs ();
1150 c_parser_declspecs (parser, specs, true, true, start_attr_ok);
1153 c_parser_skip_to_end_of_block_or_statement (parser);
1156 if (nested && !specs->declspecs_seen_p)
1158 c_parser_error (parser, "expected declaration specifiers");
1159 c_parser_skip_to_end_of_block_or_statement (parser);
1162 finish_declspecs (specs);
1163 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1169 shadow_tag_warned (specs, 1);
1170 pedwarn (here, 0, "empty declaration");
1172 c_parser_consume_token (parser);
1175 pending_xref_error ();
1176 prefix_attrs = specs->attrs;
1177 all_prefix_attrs = prefix_attrs;
1178 specs->attrs = NULL_TREE;
1181 struct c_declarator *declarator;
1184 /* Declaring either one or more declarators (in which case we
1185 should diagnose if there were no declaration specifiers) or a
1186 function definition (in which case the diagnostic for
1187 implicit int suffices). */
1188 declarator = c_parser_declarator (parser, specs->type_seen_p,
1189 C_DTR_NORMAL, &dummy);
1190 if (declarator == NULL)
1192 c_parser_skip_to_end_of_block_or_statement (parser);
1195 if (c_parser_next_token_is (parser, CPP_EQ)
1196 || c_parser_next_token_is (parser, CPP_COMMA)
1197 || c_parser_next_token_is (parser, CPP_SEMICOLON)
1198 || c_parser_next_token_is_keyword (parser, RID_ASM)
1199 || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
1201 tree asm_name = NULL_TREE;
1202 tree postfix_attrs = NULL_TREE;
1203 if (!diagnosed_no_specs && !specs->declspecs_seen_p)
1205 diagnosed_no_specs = true;
1206 pedwarn (here, 0, "data definition has no type or storage class");
1208 /* Having seen a data definition, there cannot now be a
1209 function definition. */
1211 if (c_parser_next_token_is_keyword (parser, RID_ASM))
1212 asm_name = c_parser_simple_asm_expr (parser);
1213 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
1214 postfix_attrs = c_parser_attributes (parser);
1215 if (c_parser_next_token_is (parser, CPP_EQ))
1219 c_parser_consume_token (parser);
1220 /* The declaration of the variable is in effect while
1221 its initializer is parsed. */
1222 d = start_decl (declarator, specs, true,
1223 chainon (postfix_attrs, all_prefix_attrs));
1225 d = error_mark_node;
1226 start_init (d, asm_name, global_bindings_p ());
1227 init = c_parser_initializer (parser);
1229 if (d != error_mark_node)
1231 maybe_warn_string_init (TREE_TYPE (d), init);
1232 finish_decl (d, init.value, asm_name);
1237 tree d = start_decl (declarator, specs, false,
1238 chainon (postfix_attrs,
1241 finish_decl (d, NULL_TREE, asm_name);
1243 if (c_parser_next_token_is (parser, CPP_COMMA))
1245 c_parser_consume_token (parser);
1246 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
1247 all_prefix_attrs = chainon (c_parser_attributes (parser),
1250 all_prefix_attrs = prefix_attrs;
1253 else if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1255 c_parser_consume_token (parser);
1260 c_parser_error (parser, "expected %<,%> or %<;%>");
1261 c_parser_skip_to_end_of_block_or_statement (parser);
1267 c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, "
1268 "%<asm%> or %<__attribute__%>");
1269 c_parser_skip_to_end_of_block_or_statement (parser);
1272 /* Function definition (nested or otherwise). */
1275 pedwarn (here, OPT_pedantic, "ISO C forbids nested functions");
1276 c_push_function_context ();
1278 if (!start_function (specs, declarator, all_prefix_attrs))
1280 /* This can appear in many cases looking nothing like a
1281 function definition, so we don't give a more specific
1282 error suggesting there was one. */
1283 c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, %<asm%> "
1284 "or %<__attribute__%>");
1286 c_pop_function_context ();
1289 /* Parse old-style parameter declarations. ??? Attributes are
1290 not allowed to start declaration specifiers here because of a
1291 syntax conflict between a function declaration with attribute
1292 suffix and a function definition with an attribute prefix on
1293 first old-style parameter declaration. Following the old
1294 parser, they are not accepted on subsequent old-style
1295 parameter declarations either. However, there is no
1296 ambiguity after the first declaration, nor indeed on the
1297 first as long as we don't allow postfix attributes after a
1298 declarator with a nonempty identifier list in a definition;
1299 and postfix attributes have never been accepted here in
1300 function definitions either. */
1301 while (c_parser_next_token_is_not (parser, CPP_EOF)
1302 && c_parser_next_token_is_not (parser, CPP_OPEN_BRACE))
1303 c_parser_declaration_or_fndef (parser, false, false, true, false);
1304 store_parm_decls ();
1305 DECL_STRUCT_FUNCTION (current_function_decl)->function_start_locus
1306 = c_parser_peek_token (parser)->location;
1307 fnbody = c_parser_compound_statement (parser);
1310 tree decl = current_function_decl;
1313 c_pop_function_context ();
1314 add_stmt (build_stmt (DECL_EXPR, decl));
1325 /* Parse an asm-definition (asm() outside a function body). This is a
1333 c_parser_asm_definition (c_parser *parser)
1335 tree asm_str = c_parser_simple_asm_expr (parser);
1337 cgraph_add_asm_node (asm_str);
1338 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
1341 /* Parse some declaration specifiers (possibly none) (C90 6.5, C99
1342 6.7), adding them to SPECS (which may already include some).
1343 Storage class specifiers are accepted iff SCSPEC_OK; type
1344 specifiers are accepted iff TYPESPEC_OK; attributes are accepted at
1345 the start iff START_ATTR_OK.
1347 declaration-specifiers:
1348 storage-class-specifier declaration-specifiers[opt]
1349 type-specifier declaration-specifiers[opt]
1350 type-qualifier declaration-specifiers[opt]
1351 function-specifier declaration-specifiers[opt]
1353 Function specifiers (inline) are from C99, and are currently
1354 handled as storage class specifiers, as is __thread.
1356 C90 6.5.1, C99 6.7.1:
1357 storage-class-specifier:
1368 C90 6.5.2, C99 6.7.2:
1381 [_Imaginary removed in C99 TC2]
1382 struct-or-union-specifier
1386 (_Bool and _Complex are new in C99.)
1388 C90 6.5.3, C99 6.7.3:
1395 (restrict is new in C99.)
1399 declaration-specifiers:
1400 attributes declaration-specifiers[opt]
1402 storage-class-specifier:
1414 (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037:
1415 http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf)
1420 class-name objc-protocol-refs[opt]
1421 typedef-name objc-protocol-refs
1426 c_parser_declspecs (c_parser *parser, struct c_declspecs *specs,
1427 bool scspec_ok, bool typespec_ok, bool start_attr_ok)
1429 bool attrs_ok = start_attr_ok;
1430 bool seen_type = specs->type_seen_p;
1431 while (c_parser_next_token_is (parser, CPP_NAME)
1432 || c_parser_next_token_is (parser, CPP_KEYWORD)
1433 || (c_dialect_objc () && c_parser_next_token_is (parser, CPP_LESS)))
1435 struct c_typespec t;
1437 if (c_parser_next_token_is (parser, CPP_NAME))
1439 tree value = c_parser_peek_token (parser)->value;
1440 c_id_kind kind = c_parser_peek_token (parser)->id_kind;
1441 /* This finishes the specifiers unless a type name is OK, it
1442 is declared as a type name and a type name hasn't yet
1444 if (!typespec_ok || seen_type
1445 || (kind != C_ID_TYPENAME && kind != C_ID_CLASSNAME))
1447 c_parser_consume_token (parser);
1450 if (kind == C_ID_TYPENAME
1451 && (!c_dialect_objc ()
1452 || c_parser_next_token_is_not (parser, CPP_LESS)))
1454 t.kind = ctsk_typedef;
1455 /* For a typedef name, record the meaning, not the name.
1456 In case of 'foo foo, bar;'. */
1457 t.spec = lookup_name (value);
1461 tree proto = NULL_TREE;
1462 gcc_assert (c_dialect_objc ());
1464 if (c_parser_next_token_is (parser, CPP_LESS))
1465 proto = c_parser_objc_protocol_refs (parser);
1466 t.spec = objc_get_protocol_qualified_type (value, proto);
1468 declspecs_add_type (specs, t);
1471 if (c_parser_next_token_is (parser, CPP_LESS))
1473 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
1474 nisse@lysator.liu.se. */
1476 gcc_assert (c_dialect_objc ());
1477 if (!typespec_ok || seen_type)
1479 proto = c_parser_objc_protocol_refs (parser);
1481 t.spec = objc_get_protocol_qualified_type (NULL_TREE, proto);
1482 declspecs_add_type (specs, t);
1485 gcc_assert (c_parser_next_token_is (parser, CPP_KEYWORD));
1486 switch (c_parser_peek_token (parser)->keyword)
1498 /* TODO: Distinguish between function specifiers (inline)
1499 and storage class specifiers, either here or in
1500 declspecs_add_scspec. */
1501 declspecs_add_scspec (specs, c_parser_peek_token (parser)->value);
1502 c_parser_consume_token (parser);
1525 if (c_dialect_objc ())
1526 parser->objc_need_raw_identifier = true;
1527 t.kind = ctsk_resword;
1528 t.spec = c_parser_peek_token (parser)->value;
1529 declspecs_add_type (specs, t);
1530 c_parser_consume_token (parser);
1537 t = c_parser_enum_specifier (parser);
1538 declspecs_add_type (specs, t);
1546 t = c_parser_struct_or_union_specifier (parser);
1547 declspecs_add_type (specs, t);
1550 /* ??? The old parser rejected typeof after other type
1551 specifiers, but is a syntax error the best way of
1553 if (!typespec_ok || seen_type)
1557 t = c_parser_typeof_specifier (parser);
1558 declspecs_add_type (specs, t);
1564 declspecs_add_qual (specs, c_parser_peek_token (parser)->value);
1565 c_parser_consume_token (parser);
1570 attrs = c_parser_attributes (parser);
1571 declspecs_add_attrs (specs, attrs);
1580 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
1583 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
1584 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
1585 enum attributes[opt] identifier
1587 The form with trailing comma is new in C99. The forms with
1588 attributes are GNU extensions. In GNU C, we accept any expression
1589 without commas in the syntax (assignment expressions, not just
1590 conditional expressions); assignment expressions will be diagnosed
1595 enumerator-list , enumerator
1598 enumeration-constant
1599 enumeration-constant = constant-expression
1602 static struct c_typespec
1603 c_parser_enum_specifier (c_parser *parser)
1605 struct c_typespec ret;
1607 tree ident = NULL_TREE;
1608 location_t ident_loc = UNKNOWN_LOCATION; /* Quiet warning. */
1609 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ENUM));
1610 c_parser_consume_token (parser);
1611 attrs = c_parser_attributes (parser);
1612 /* Set the location in case we create a decl now. */
1613 c_parser_set_source_position_from_token (c_parser_peek_token (parser));
1614 if (c_parser_next_token_is (parser, CPP_NAME))
1616 ident = c_parser_peek_token (parser)->value;
1617 ident_loc = c_parser_peek_token (parser)->location;
1618 c_parser_consume_token (parser);
1620 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
1622 /* Parse an enum definition. */
1623 struct c_enum_contents the_enum;
1624 tree type = start_enum (&the_enum, ident);
1626 /* We chain the enumerators in reverse order, then put them in
1627 forward order at the end. */
1628 tree values = NULL_TREE;
1629 c_parser_consume_token (parser);
1637 location_t comma_loc = UNKNOWN_LOCATION; /* Quiet warning. */
1638 location_t value_loc;
1639 if (c_parser_next_token_is_not (parser, CPP_NAME))
1641 c_parser_error (parser, "expected identifier");
1642 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
1643 values = error_mark_node;
1646 token = c_parser_peek_token (parser);
1647 enum_id = token->value;
1648 /* Set the location in case we create a decl now. */
1649 c_parser_set_source_position_from_token (token);
1650 value_loc = token->location;
1651 c_parser_consume_token (parser);
1652 if (c_parser_next_token_is (parser, CPP_EQ))
1654 c_parser_consume_token (parser);
1655 value_loc = c_parser_peek_token (parser)->location;
1656 enum_value = c_parser_expr_no_commas (parser, NULL).value;
1659 enum_value = NULL_TREE;
1660 enum_decl = build_enumerator (&the_enum, enum_id, enum_value,
1662 TREE_CHAIN (enum_decl) = values;
1665 if (c_parser_next_token_is (parser, CPP_COMMA))
1667 comma_loc = c_parser_peek_token (parser)->location;
1669 c_parser_consume_token (parser);
1671 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
1673 if (seen_comma && !flag_isoc99)
1674 pedwarn (comma_loc, OPT_pedantic, "comma at end of enumerator list");
1675 c_parser_consume_token (parser);
1680 c_parser_error (parser, "expected %<,%> or %<}%>");
1681 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
1682 values = error_mark_node;
1686 postfix_attrs = c_parser_attributes (parser);
1687 ret.spec = finish_enum (type, nreverse (values),
1688 chainon (attrs, postfix_attrs));
1689 ret.kind = ctsk_tagdef;
1694 c_parser_error (parser, "expected %<{%>");
1695 ret.spec = error_mark_node;
1696 ret.kind = ctsk_tagref;
1699 ret = parser_xref_tag (ENUMERAL_TYPE, ident);
1700 /* In ISO C, enumerated types can be referred to only if already
1702 if (pedantic && !COMPLETE_TYPE_P (ret.spec))
1705 pedwarn (ident_loc, OPT_pedantic,
1706 "ISO C forbids forward references to %<enum%> types");
1711 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
1713 struct-or-union-specifier:
1714 struct-or-union attributes[opt] identifier[opt]
1715 { struct-contents } attributes[opt]
1716 struct-or-union attributes[opt] identifier
1719 struct-declaration-list
1721 struct-declaration-list:
1722 struct-declaration ;
1723 struct-declaration-list struct-declaration ;
1730 struct-declaration-list struct-declaration
1732 struct-declaration-list:
1733 struct-declaration-list ;
1736 (Note that in the syntax here, unlike that in ISO C, the semicolons
1737 are included here rather than in struct-declaration, in order to
1738 describe the syntax with extra semicolons and missing semicolon at
1743 struct-declaration-list:
1744 @defs ( class-name )
1746 (Note this does not include a trailing semicolon, but can be
1747 followed by further declarations, and gets a pedwarn-if-pedantic
1748 when followed by a semicolon.) */
1750 static struct c_typespec
1751 c_parser_struct_or_union_specifier (c_parser *parser)
1753 struct c_typespec ret;
1755 tree ident = NULL_TREE;
1756 enum tree_code code;
1757 switch (c_parser_peek_token (parser)->keyword)
1768 c_parser_consume_token (parser);
1769 attrs = c_parser_attributes (parser);
1770 /* Set the location in case we create a decl now. */
1771 c_parser_set_source_position_from_token (c_parser_peek_token (parser));
1772 if (c_parser_next_token_is (parser, CPP_NAME))
1774 ident = c_parser_peek_token (parser)->value;
1775 c_parser_consume_token (parser);
1777 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
1779 /* Parse a struct or union definition. Start the scope of the
1780 tag before parsing components. */
1781 tree type = start_struct (code, ident);
1783 /* We chain the components in reverse order, then put them in
1784 forward order at the end. Each struct-declaration may
1785 declare multiple components (comma-separated), so we must use
1786 chainon to join them, although when parsing each
1787 struct-declaration we can use TREE_CHAIN directly.
1789 The theory behind all this is that there will be more
1790 semicolon separated fields than comma separated fields, and
1791 so we'll be minimizing the number of node traversals required
1793 tree contents = NULL_TREE;
1794 c_parser_consume_token (parser);
1795 /* Handle the Objective-C @defs construct,
1796 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
1797 if (c_parser_next_token_is_keyword (parser, RID_AT_DEFS))
1800 gcc_assert (c_dialect_objc ());
1801 c_parser_consume_token (parser);
1802 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
1804 if (c_parser_next_token_is (parser, CPP_NAME)
1805 && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)
1807 name = c_parser_peek_token (parser)->value;
1808 c_parser_consume_token (parser);
1812 c_parser_error (parser, "expected class name");
1813 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
1816 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
1818 contents = nreverse (objc_get_class_ivars (name));
1821 /* Parse the struct-declarations and semicolons. Problems with
1822 semicolons are diagnosed here; empty structures are diagnosed
1827 /* Parse any stray semicolon. */
1828 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1830 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
1831 "extra semicolon in struct or union specified");
1832 c_parser_consume_token (parser);
1835 /* Stop if at the end of the struct or union contents. */
1836 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
1838 c_parser_consume_token (parser);
1841 /* Accept #pragmas at struct scope. */
1842 if (c_parser_next_token_is (parser, CPP_PRAGMA))
1844 c_parser_pragma (parser, pragma_external);
1847 /* Parse some comma-separated declarations, but not the
1848 trailing semicolon if any. */
1849 decls = c_parser_struct_declaration (parser);
1850 contents = chainon (decls, contents);
1851 /* If no semicolon follows, either we have a parse error or
1852 are at the end of the struct or union and should
1854 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1855 c_parser_consume_token (parser);
1858 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
1859 pedwarn (c_parser_peek_token (parser)->location, 0,
1860 "no semicolon at end of struct or union");
1863 c_parser_error (parser, "expected %<;%>");
1864 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
1869 postfix_attrs = c_parser_attributes (parser);
1870 ret.spec = finish_struct (type, nreverse (contents),
1871 chainon (attrs, postfix_attrs));
1872 ret.kind = ctsk_tagdef;
1877 c_parser_error (parser, "expected %<{%>");
1878 ret.spec = error_mark_node;
1879 ret.kind = ctsk_tagref;
1882 ret = parser_xref_tag (code, ident);
1886 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
1887 the trailing semicolon.
1890 specifier-qualifier-list struct-declarator-list
1892 specifier-qualifier-list:
1893 type-specifier specifier-qualifier-list[opt]
1894 type-qualifier specifier-qualifier-list[opt]
1895 attributes specifier-qualifier-list[opt]
1897 struct-declarator-list:
1899 struct-declarator-list , attributes[opt] struct-declarator
1902 declarator attributes[opt]
1903 declarator[opt] : constant-expression attributes[opt]
1908 __extension__ struct-declaration
1909 specifier-qualifier-list
1911 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
1912 of attributes where shown is a GNU extension. In GNU C, we accept
1913 any expression without commas in the syntax (assignment
1914 expressions, not just conditional expressions); assignment
1915 expressions will be diagnosed as non-constant. */
1918 c_parser_struct_declaration (c_parser *parser)
1920 struct c_declspecs *specs;
1922 tree all_prefix_attrs;
1924 location_t decl_loc;
1925 if (c_parser_next_token_is_keyword (parser, RID_EXTENSION))
1929 ext = disable_extension_diagnostics ();
1930 c_parser_consume_token (parser);
1931 decl = c_parser_struct_declaration (parser);
1932 restore_extension_diagnostics (ext);
1935 specs = build_null_declspecs ();
1936 decl_loc = c_parser_peek_token (parser)->location;
1937 c_parser_declspecs (parser, specs, false, true, true);
1940 if (!specs->declspecs_seen_p)
1942 c_parser_error (parser, "expected specifier-qualifier-list");
1945 finish_declspecs (specs);
1946 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1949 if (!specs->type_seen_p)
1951 pedwarn (decl_loc, OPT_pedantic,
1952 "ISO C forbids member declarations with no members");
1953 shadow_tag_warned (specs, pedantic);
1958 /* Support for unnamed structs or unions as members of
1959 structs or unions (which is [a] useful and [b] supports
1963 ret = grokfield (c_parser_peek_token (parser)->location,
1964 build_id_declarator (NULL_TREE), specs,
1967 decl_attributes (&ret, attrs, 0);
1971 pending_xref_error ();
1972 prefix_attrs = specs->attrs;
1973 all_prefix_attrs = prefix_attrs;
1974 specs->attrs = NULL_TREE;
1978 /* Declaring one or more declarators or un-named bit-fields. */
1979 struct c_declarator *declarator;
1981 if (c_parser_next_token_is (parser, CPP_COLON))
1982 declarator = build_id_declarator (NULL_TREE);
1984 declarator = c_parser_declarator (parser, specs->type_seen_p,
1985 C_DTR_NORMAL, &dummy);
1986 if (declarator == NULL)
1988 c_parser_skip_to_end_of_block_or_statement (parser);
1991 if (c_parser_next_token_is (parser, CPP_COLON)
1992 || c_parser_next_token_is (parser, CPP_COMMA)
1993 || c_parser_next_token_is (parser, CPP_SEMICOLON)
1994 || c_parser_next_token_is (parser, CPP_CLOSE_BRACE)
1995 || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
1997 tree postfix_attrs = NULL_TREE;
1998 tree width = NULL_TREE;
2000 if (c_parser_next_token_is (parser, CPP_COLON))
2002 c_parser_consume_token (parser);
2003 width = c_parser_expr_no_commas (parser, NULL).value;
2005 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2006 postfix_attrs = c_parser_attributes (parser);
2007 d = grokfield (c_parser_peek_token (parser)->location,
2008 declarator, specs, width, &all_prefix_attrs);
2009 decl_attributes (&d, chainon (postfix_attrs,
2010 all_prefix_attrs), 0);
2011 TREE_CHAIN (d) = decls;
2013 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2014 all_prefix_attrs = chainon (c_parser_attributes (parser),
2017 all_prefix_attrs = prefix_attrs;
2018 if (c_parser_next_token_is (parser, CPP_COMMA))
2019 c_parser_consume_token (parser);
2020 else if (c_parser_next_token_is (parser, CPP_SEMICOLON)
2021 || c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
2023 /* Semicolon consumed in caller. */
2028 c_parser_error (parser, "expected %<,%>, %<;%> or %<}%>");
2034 c_parser_error (parser,
2035 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2036 "%<__attribute__%>");
2043 /* Parse a typeof specifier (a GNU extension).
2046 typeof ( expression )
2047 typeof ( type-name )
2050 static struct c_typespec
2051 c_parser_typeof_specifier (c_parser *parser)
2053 struct c_typespec ret;
2054 ret.kind = ctsk_typeof;
2055 ret.spec = error_mark_node;
2056 gcc_assert (c_parser_next_token_is_keyword (parser, RID_TYPEOF));
2057 c_parser_consume_token (parser);
2060 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2066 if (c_parser_next_token_starts_typename (parser))
2068 struct c_type_name *type = c_parser_type_name (parser);
2073 ret.spec = groktypename (type);
2074 pop_maybe_used (variably_modified_type_p (ret.spec, NULL_TREE));
2080 location_t here = c_parser_peek_token (parser)->location;
2081 struct c_expr expr = c_parser_expression (parser);
2084 if (TREE_CODE (expr.value) == COMPONENT_REF
2085 && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1)))
2086 error_at (here, "%<typeof%> applied to a bit-field");
2087 ret.spec = TREE_TYPE (expr.value);
2088 was_vm = variably_modified_type_p (ret.spec, NULL_TREE);
2089 /* This should be returned with the type so that when the type
2090 is evaluated, this can be evaluated. For now, we avoid
2091 evaluation when the context might. */
2092 if (!skip_evaluation && was_vm)
2094 tree e = expr.value;
2096 /* If the expression is not of a type to which we cannot assign a line
2097 number, wrap the thing in a no-op NOP_EXPR. */
2098 if (DECL_P (e) || CONSTANT_CLASS_P (e))
2099 e = build1 (NOP_EXPR, void_type_node, e);
2101 protected_set_expr_location (e, here);
2105 pop_maybe_used (was_vm);
2107 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
2111 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2112 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2113 be redeclared; otherwise it may not. KIND indicates which kind of
2114 declarator is wanted. Returns a valid declarator except in the
2115 case of a syntax error in which case NULL is returned. *SEEN_ID is
2116 set to true if an identifier being declared is seen; this is used
2117 to diagnose bad forms of abstract array declarators and to
2118 determine whether an identifier list is syntactically permitted.
2121 pointer[opt] direct-declarator
2125 ( attributes[opt] declarator )
2126 direct-declarator array-declarator
2127 direct-declarator ( parameter-type-list )
2128 direct-declarator ( identifier-list[opt] )
2131 * type-qualifier-list[opt]
2132 * type-qualifier-list[opt] pointer
2134 type-qualifier-list:
2137 type-qualifier-list type-qualifier
2138 type-qualifier-list attributes
2140 parameter-type-list:
2142 parameter-list , ...
2145 parameter-declaration
2146 parameter-list , parameter-declaration
2148 parameter-declaration:
2149 declaration-specifiers declarator attributes[opt]
2150 declaration-specifiers abstract-declarator[opt] attributes[opt]
2154 identifier-list , identifier
2156 abstract-declarator:
2158 pointer[opt] direct-abstract-declarator
2160 direct-abstract-declarator:
2161 ( attributes[opt] abstract-declarator )
2162 direct-abstract-declarator[opt] array-declarator
2163 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2168 direct-declarator ( parameter-forward-declarations
2169 parameter-type-list[opt] )
2171 direct-abstract-declarator:
2172 direct-abstract-declarator[opt] ( parameter-forward-declarations
2173 parameter-type-list[opt] )
2175 parameter-forward-declarations:
2177 parameter-forward-declarations parameter-list ;
2179 The uses of attributes shown above are GNU extensions.
2181 Some forms of array declarator are not included in C99 in the
2182 syntax for abstract declarators; these are disallowed elsewhere.
2183 This may be a defect (DR#289).
2185 This function also accepts an omitted abstract declarator as being
2186 an abstract declarator, although not part of the formal syntax. */
2188 static struct c_declarator *
2189 c_parser_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind,
2192 /* Parse any initial pointer part. */
2193 if (c_parser_next_token_is (parser, CPP_MULT))
2195 struct c_declspecs *quals_attrs = build_null_declspecs ();
2196 struct c_declarator *inner;
2197 c_parser_consume_token (parser);
2198 c_parser_declspecs (parser, quals_attrs, false, false, true);
2199 inner = c_parser_declarator (parser, type_seen_p, kind, seen_id);
2203 return make_pointer_declarator (quals_attrs, inner);
2205 /* Now we have a direct declarator, direct abstract declarator or
2206 nothing (which counts as a direct abstract declarator here). */
2207 return c_parser_direct_declarator (parser, type_seen_p, kind, seen_id);
2210 /* Parse a direct declarator or direct abstract declarator; arguments
2211 as c_parser_declarator. */
2213 static struct c_declarator *
2214 c_parser_direct_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind,
2217 /* The direct declarator must start with an identifier (possibly
2218 omitted) or a parenthesized declarator (possibly abstract). In
2219 an ordinary declarator, initial parentheses must start a
2220 parenthesized declarator. In an abstract declarator or parameter
2221 declarator, they could start a parenthesized declarator or a
2222 parameter list. To tell which, the open parenthesis and any
2223 following attributes must be read. If a declaration specifier
2224 follows, then it is a parameter list; if the specifier is a
2225 typedef name, there might be an ambiguity about redeclaring it,
2226 which is resolved in the direction of treating it as a typedef
2227 name. If a close parenthesis follows, it is also an empty
2228 parameter list, as the syntax does not permit empty abstract
2229 declarators. Otherwise, it is a parenthesized declarator (in
2230 which case the analysis may be repeated inside it, recursively).
2232 ??? There is an ambiguity in a parameter declaration "int
2233 (__attribute__((foo)) x)", where x is not a typedef name: it
2234 could be an abstract declarator for a function, or declare x with
2235 parentheses. The proper resolution of this ambiguity needs
2236 documenting. At present we follow an accident of the old
2237 parser's implementation, whereby the first parameter must have
2238 some declaration specifiers other than just attributes. Thus as
2239 a parameter declaration it is treated as a parenthesized
2240 parameter named x, and as an abstract declarator it is
2243 ??? Also following the old parser, attributes inside an empty
2244 parameter list are ignored, making it a list not yielding a
2245 prototype, rather than giving an error or making it have one
2246 parameter with implicit type int.
2248 ??? Also following the old parser, typedef names may be
2249 redeclared in declarators, but not Objective-C class names. */
2251 if (kind != C_DTR_ABSTRACT
2252 && c_parser_next_token_is (parser, CPP_NAME)
2254 && c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME)
2255 || c_parser_peek_token (parser)->id_kind == C_ID_ID))
2257 struct c_declarator *inner
2258 = build_id_declarator (c_parser_peek_token (parser)->value);
2260 inner->id_loc = c_parser_peek_token (parser)->location;
2261 c_parser_consume_token (parser);
2262 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2265 if (kind != C_DTR_NORMAL
2266 && c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
2268 struct c_declarator *inner = build_id_declarator (NULL_TREE);
2269 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2272 /* Either we are at the end of an abstract declarator, or we have
2275 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
2278 struct c_declarator *inner;
2279 c_parser_consume_token (parser);
2280 attrs = c_parser_attributes (parser);
2281 if (kind != C_DTR_NORMAL
2282 && (c_parser_next_token_starts_declspecs (parser)
2283 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN)))
2285 struct c_arg_info *args
2286 = c_parser_parms_declarator (parser, kind == C_DTR_NORMAL,
2293 = build_function_declarator (args,
2294 build_id_declarator (NULL_TREE));
2295 return c_parser_direct_declarator_inner (parser, *seen_id,
2299 /* A parenthesized declarator. */
2300 inner = c_parser_declarator (parser, type_seen_p, kind, seen_id);
2301 if (inner != NULL && attrs != NULL)
2302 inner = build_attrs_declarator (attrs, inner);
2303 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2305 c_parser_consume_token (parser);
2309 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2313 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2320 if (kind == C_DTR_NORMAL)
2322 c_parser_error (parser, "expected identifier or %<(%>");
2326 return build_id_declarator (NULL_TREE);
2330 /* Parse part of a direct declarator or direct abstract declarator,
2331 given that some (in INNER) has already been parsed; ID_PRESENT is
2332 true if an identifier is present, false for an abstract
2335 static struct c_declarator *
2336 c_parser_direct_declarator_inner (c_parser *parser, bool id_present,
2337 struct c_declarator *inner)
2339 /* Parse a sequence of array declarators and parameter lists. */
2340 if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
2342 struct c_declarator *declarator;
2343 struct c_declspecs *quals_attrs = build_null_declspecs ();
2347 c_parser_consume_token (parser);
2348 c_parser_declspecs (parser, quals_attrs, false, false, true);
2349 static_seen = c_parser_next_token_is_keyword (parser, RID_STATIC);
2351 c_parser_consume_token (parser);
2352 if (static_seen && !quals_attrs->declspecs_seen_p)
2353 c_parser_declspecs (parser, quals_attrs, false, false, true);
2354 if (!quals_attrs->declspecs_seen_p)
2356 /* If "static" is present, there must be an array dimension.
2357 Otherwise, there may be a dimension, "*", or no
2362 dimen = c_parser_expr_no_commas (parser, NULL).value;
2366 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
2371 else if (c_parser_next_token_is (parser, CPP_MULT))
2373 if (c_parser_peek_2nd_token (parser)->type == CPP_CLOSE_SQUARE)
2377 c_parser_consume_token (parser);
2382 dimen = c_parser_expr_no_commas (parser, NULL).value;
2388 dimen = c_parser_expr_no_commas (parser, NULL).value;
2391 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
2392 c_parser_consume_token (parser);
2395 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
2399 declarator = build_array_declarator (dimen, quals_attrs, static_seen,
2401 if (declarator == NULL)
2403 inner = set_array_declarator_inner (declarator, inner);
2404 return c_parser_direct_declarator_inner (parser, id_present, inner);
2406 else if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
2409 struct c_arg_info *args;
2410 c_parser_consume_token (parser);
2411 attrs = c_parser_attributes (parser);
2412 args = c_parser_parms_declarator (parser, id_present, attrs);
2417 inner = build_function_declarator (args, inner);
2418 return c_parser_direct_declarator_inner (parser, id_present, inner);
2424 /* Parse a parameter list or identifier list, including the closing
2425 parenthesis but not the opening one. ATTRS are the attributes at
2426 the start of the list. ID_LIST_OK is true if an identifier list is
2427 acceptable; such a list must not have attributes at the start. */
2429 static struct c_arg_info *
2430 c_parser_parms_declarator (c_parser *parser, bool id_list_ok, tree attrs)
2433 declare_parm_level ();
2434 /* If the list starts with an identifier, it is an identifier list.
2435 Otherwise, it is either a prototype list or an empty list. */
2438 && c_parser_next_token_is (parser, CPP_NAME)
2439 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
2441 tree list = NULL_TREE, *nextp = &list;
2442 while (c_parser_next_token_is (parser, CPP_NAME)
2443 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
2445 *nextp = build_tree_list (NULL_TREE,
2446 c_parser_peek_token (parser)->value);
2447 nextp = & TREE_CHAIN (*nextp);
2448 c_parser_consume_token (parser);
2449 if (c_parser_next_token_is_not (parser, CPP_COMMA))
2451 c_parser_consume_token (parser);
2452 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2454 c_parser_error (parser, "expected identifier");
2458 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2460 struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
2465 ret->pending_sizes = 0;
2466 ret->had_vla_unspec = 0;
2467 c_parser_consume_token (parser);
2473 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2481 struct c_arg_info *ret = c_parser_parms_list_declarator (parser, attrs);
2487 /* Parse a parameter list (possibly empty), including the closing
2488 parenthesis but not the opening one. ATTRS are the attributes at
2489 the start of the list. */
2491 static struct c_arg_info *
2492 c_parser_parms_list_declarator (c_parser *parser, tree attrs)
2494 bool good_parm = false;
2495 /* ??? Following the old parser, forward parameter declarations may
2496 use abstract declarators, and if no real parameter declarations
2497 follow the forward declarations then this is not diagnosed. Also
2498 note as above that attributes are ignored as the only contents of
2499 the parentheses, or as the only contents after forward
2501 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2503 struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
2508 ret->pending_sizes = 0;
2509 ret->had_vla_unspec = 0;
2510 c_parser_consume_token (parser);
2513 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
2515 struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
2519 ret->pending_sizes = 0;
2520 ret->had_vla_unspec = 0;
2521 /* Suppress -Wold-style-definition for this case. */
2522 ret->types = error_mark_node;
2523 error_at (c_parser_peek_token (parser)->location,
2524 "ISO C requires a named argument before %<...%>");
2525 c_parser_consume_token (parser);
2526 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2528 c_parser_consume_token (parser);
2533 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2538 /* Nonempty list of parameters, either terminated with semicolon
2539 (forward declarations; recurse) or with close parenthesis (normal
2540 function) or with ", ... )" (variadic function). */
2543 /* Parse a parameter. */
2544 struct c_parm *parm = c_parser_parameter_declaration (parser, attrs);
2549 push_parm_decl (parm);
2551 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
2554 c_parser_consume_token (parser);
2555 mark_forward_parm_decls ();
2556 new_attrs = c_parser_attributes (parser);
2557 return c_parser_parms_list_declarator (parser, new_attrs);
2559 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2561 c_parser_consume_token (parser);
2563 return get_parm_info (false);
2566 struct c_arg_info *ret
2567 = XOBNEW (&parser_obstack, struct c_arg_info);
2572 ret->pending_sizes = 0;
2573 ret->had_vla_unspec = 0;
2577 if (!c_parser_require (parser, CPP_COMMA,
2578 "expected %<;%>, %<,%> or %<)%>"))
2580 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
2581 get_pending_sizes ();
2584 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
2586 c_parser_consume_token (parser);
2587 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2589 c_parser_consume_token (parser);
2591 return get_parm_info (true);
2594 struct c_arg_info *ret
2595 = XOBNEW (&parser_obstack, struct c_arg_info);
2600 ret->pending_sizes = 0;
2601 ret->had_vla_unspec = 0;
2607 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2609 get_pending_sizes ();
2616 /* Parse a parameter declaration. ATTRS are the attributes at the
2617 start of the declaration if it is the first parameter. */
2619 static struct c_parm *
2620 c_parser_parameter_declaration (c_parser *parser, tree attrs)
2622 struct c_declspecs *specs;
2623 struct c_declarator *declarator;
2625 tree postfix_attrs = NULL_TREE;
2627 if (!c_parser_next_token_starts_declspecs (parser))
2629 /* ??? In some Objective-C cases '...' isn't applicable so there
2630 should be a different message. */
2631 c_parser_error (parser,
2632 "expected declaration specifiers or %<...%>");
2633 c_parser_skip_to_end_of_parameter (parser);
2636 specs = build_null_declspecs ();
2639 declspecs_add_attrs (specs, attrs);
2642 c_parser_declspecs (parser, specs, true, true, true);
2643 finish_declspecs (specs);
2644 pending_xref_error ();
2645 prefix_attrs = specs->attrs;
2646 specs->attrs = NULL_TREE;
2647 declarator = c_parser_declarator (parser, specs->type_seen_p,
2648 C_DTR_PARM, &dummy);
2649 if (declarator == NULL)
2651 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
2654 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2655 postfix_attrs = c_parser_attributes (parser);
2656 return build_c_parm (specs, chainon (postfix_attrs, prefix_attrs),
2660 /* Parse a string literal in an asm expression. It should not be
2661 translated, and wide string literals are an error although
2662 permitted by the syntax. This is a GNU extension.
2667 ??? At present, following the old parser, the caller needs to have
2668 set lex_untranslated_string to 1. It would be better to follow the
2669 C++ parser rather than using this kludge. */
2672 c_parser_asm_string_literal (c_parser *parser)
2675 if (c_parser_next_token_is (parser, CPP_STRING))
2677 str = c_parser_peek_token (parser)->value;
2678 c_parser_consume_token (parser);
2680 else if (c_parser_next_token_is (parser, CPP_WSTRING))
2682 error_at (c_parser_peek_token (parser)->location,
2683 "wide string literal in %<asm%>");
2684 str = build_string (1, "");
2685 c_parser_consume_token (parser);
2689 c_parser_error (parser, "expected string literal");
2695 /* Parse a simple asm expression. This is used in restricted
2696 contexts, where a full expression with inputs and outputs does not
2697 make sense. This is a GNU extension.
2700 asm ( asm-string-literal )
2704 c_parser_simple_asm_expr (c_parser *parser)
2707 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM));
2708 /* ??? Follow the C++ parser rather than using the
2709 lex_untranslated_string kludge. */
2710 parser->lex_untranslated_string = true;
2711 c_parser_consume_token (parser);
2712 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2714 parser->lex_untranslated_string = false;
2717 str = c_parser_asm_string_literal (parser);
2718 parser->lex_untranslated_string = false;
2719 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
2721 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
2727 /* Parse (possibly empty) attributes. This is a GNU extension.
2731 attributes attribute
2734 __attribute__ ( ( attribute-list ) )
2738 attribute_list , attrib
2743 any-word ( identifier )
2744 any-word ( identifier , nonempty-expr-list )
2745 any-word ( expr-list )
2747 where the "identifier" must not be declared as a type, and
2748 "any-word" may be any identifier (including one declared as a
2749 type), a reserved word storage class specifier, type specifier or
2750 type qualifier. ??? This still leaves out most reserved keywords
2751 (following the old parser), shouldn't we include them, and why not
2752 allow identifiers declared as types to start the arguments? */
2755 c_parser_attributes (c_parser *parser)
2757 tree attrs = NULL_TREE;
2758 while (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2760 /* ??? Follow the C++ parser rather than using the
2761 lex_untranslated_string kludge. */
2762 parser->lex_untranslated_string = true;
2763 c_parser_consume_token (parser);
2764 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2766 parser->lex_untranslated_string = false;
2769 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2771 parser->lex_untranslated_string = false;
2772 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
2775 /* Parse the attribute list. */
2776 while (c_parser_next_token_is (parser, CPP_COMMA)
2777 || c_parser_next_token_is (parser, CPP_NAME)
2778 || c_parser_next_token_is (parser, CPP_KEYWORD))
2780 tree attr, attr_name, attr_args;
2781 if (c_parser_next_token_is (parser, CPP_COMMA))
2783 c_parser_consume_token (parser);
2786 if (c_parser_next_token_is (parser, CPP_KEYWORD))
2788 /* ??? See comment above about what keywords are
2791 switch (c_parser_peek_token (parser)->keyword)
2828 /* Accept __attribute__((__const)) as __attribute__((const))
2831 = ridpointers[(int) c_parser_peek_token (parser)->keyword];
2834 attr_name = c_parser_peek_token (parser)->value;
2835 c_parser_consume_token (parser);
2836 if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN))
2838 attr = build_tree_list (attr_name, NULL_TREE);
2839 attrs = chainon (attrs, attr);
2842 c_parser_consume_token (parser);
2843 /* Parse the attribute contents. If they start with an
2844 identifier which is followed by a comma or close
2845 parenthesis, then the arguments start with that
2846 identifier; otherwise they are an expression list. */
2847 if (c_parser_next_token_is (parser, CPP_NAME)
2848 && c_parser_peek_token (parser)->id_kind == C_ID_ID
2849 && ((c_parser_peek_2nd_token (parser)->type == CPP_COMMA)
2850 || (c_parser_peek_2nd_token (parser)->type
2851 == CPP_CLOSE_PAREN)))
2853 tree arg1 = c_parser_peek_token (parser)->value;
2854 c_parser_consume_token (parser);
2855 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2856 attr_args = build_tree_list (NULL_TREE, arg1);
2859 c_parser_consume_token (parser);
2860 attr_args = tree_cons (NULL_TREE, arg1,
2861 c_parser_expr_list (parser, false));
2866 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2867 attr_args = NULL_TREE;
2869 attr_args = c_parser_expr_list (parser, false);
2871 attr = build_tree_list (attr_name, attr_args);
2872 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2873 c_parser_consume_token (parser);
2876 parser->lex_untranslated_string = false;
2877 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2881 attrs = chainon (attrs, attr);
2883 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2884 c_parser_consume_token (parser);
2887 parser->lex_untranslated_string = false;
2888 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2892 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2893 c_parser_consume_token (parser);
2896 parser->lex_untranslated_string = false;
2897 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2901 parser->lex_untranslated_string = false;
2906 /* Parse a type name (C90 6.5.5, C99 6.7.6).
2909 specifier-qualifier-list abstract-declarator[opt]
2912 static struct c_type_name *
2913 c_parser_type_name (c_parser *parser)
2915 struct c_declspecs *specs = build_null_declspecs ();
2916 struct c_declarator *declarator;
2917 struct c_type_name *ret;
2919 c_parser_declspecs (parser, specs, false, true, true);
2920 if (!specs->declspecs_seen_p)
2922 c_parser_error (parser, "expected specifier-qualifier-list");
2925 pending_xref_error ();
2926 finish_declspecs (specs);
2927 declarator = c_parser_declarator (parser, specs->type_seen_p,
2928 C_DTR_ABSTRACT, &dummy);
2929 if (declarator == NULL)
2931 ret = XOBNEW (&parser_obstack, struct c_type_name);
2933 ret->declarator = declarator;
2937 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
2940 assignment-expression
2941 { initializer-list }
2942 { initializer-list , }
2945 designation[opt] initializer
2946 initializer-list , designation[opt] initializer
2953 designator-list designator
2960 [ constant-expression ]
2972 [ constant-expression ... constant-expression ]
2974 Any expression without commas is accepted in the syntax for the
2975 constant-expressions, with non-constant expressions rejected later.
2977 This function is only used for top-level initializers; for nested
2978 ones, see c_parser_initval. */
2980 static struct c_expr
2981 c_parser_initializer (c_parser *parser)
2983 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
2984 return c_parser_braced_init (parser, NULL_TREE, false);
2988 ret = c_parser_expr_no_commas (parser, NULL);
2989 if (TREE_CODE (ret.value) != STRING_CST
2990 && TREE_CODE (ret.value) != COMPOUND_LITERAL_EXPR)
2991 ret = default_function_array_conversion (ret);
2996 /* Parse a braced initializer list. TYPE is the type specified for a
2997 compound literal, and NULL_TREE for other initializers and for
2998 nested braced lists. NESTED_P is true for nested braced lists,
2999 false for the list of a compound literal or the list that is the
3000 top-level initializer in a declaration. */
3002 static struct c_expr
3003 c_parser_braced_init (c_parser *parser, tree type, bool nested_p)
3005 location_t brace_loc = c_parser_peek_token (parser)->location;
3006 gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE));
3007 c_parser_consume_token (parser);
3009 push_init_level (0);
3011 really_start_incremental_init (type);
3012 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3014 pedwarn (brace_loc, OPT_pedantic, "ISO C forbids empty initializer braces");
3018 /* Parse a non-empty initializer list, possibly with a trailing
3022 c_parser_initelt (parser);
3025 if (c_parser_next_token_is (parser, CPP_COMMA))
3026 c_parser_consume_token (parser);
3029 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3033 if (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE))
3036 ret.value = error_mark_node;
3037 ret.original_code = ERROR_MARK;
3038 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, "expected %<}%>");
3042 c_parser_consume_token (parser);
3043 return pop_init_level (0);
3046 /* Parse a nested initializer, including designators. */
3049 c_parser_initelt (c_parser *parser)
3051 /* Parse any designator or designator list. A single array
3052 designator may have the subsequent "=" omitted in GNU C, but a
3053 longer list or a structure member designator may not. */
3054 if (c_parser_next_token_is (parser, CPP_NAME)
3055 && c_parser_peek_2nd_token (parser)->type == CPP_COLON)
3057 /* Old-style structure member designator. */
3058 set_init_label (c_parser_peek_token (parser)->value);
3059 /* Use the colon as the error location. */
3060 pedwarn (c_parser_peek_2nd_token (parser)->location, OPT_pedantic,
3061 "obsolete use of designated initializer with %<:%>");
3062 c_parser_consume_token (parser);
3063 c_parser_consume_token (parser);
3067 /* des_seen is 0 if there have been no designators, 1 if there
3068 has been a single array designator and 2 otherwise. */
3070 /* Location of a designator. */
3071 location_t des_loc = UNKNOWN_LOCATION; /* Quiet warning. */
3072 while (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)
3073 || c_parser_next_token_is (parser, CPP_DOT))
3075 int des_prev = des_seen;
3077 des_loc = c_parser_peek_token (parser)->location;
3080 if (c_parser_next_token_is (parser, CPP_DOT))
3083 c_parser_consume_token (parser);
3084 if (c_parser_next_token_is (parser, CPP_NAME))
3086 set_init_label (c_parser_peek_token (parser)->value);
3087 c_parser_consume_token (parser);
3092 init.value = error_mark_node;
3093 init.original_code = ERROR_MARK;
3094 c_parser_error (parser, "expected identifier");
3095 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
3096 process_init_element (init, false);
3103 location_t ellipsis_loc = UNKNOWN_LOCATION; /* Quiet warning. */
3104 /* ??? Following the old parser, [ objc-receiver
3105 objc-message-args ] is accepted as an initializer,
3106 being distinguished from a designator by what follows
3107 the first assignment expression inside the square
3108 brackets, but after a first array designator a
3109 subsequent square bracket is for Objective-C taken to
3110 start an expression, using the obsolete form of
3111 designated initializer without '=', rather than
3112 possibly being a second level of designation: in LALR
3113 terms, the '[' is shifted rather than reducing
3114 designator to designator-list. */
3115 if (des_prev == 1 && c_dialect_objc ())
3117 des_seen = des_prev;
3120 if (des_prev == 0 && c_dialect_objc ())
3122 /* This might be an array designator or an
3123 Objective-C message expression. If the former,
3124 continue parsing here; if the latter, parse the
3125 remainder of the initializer given the starting
3126 primary-expression. ??? It might make sense to
3127 distinguish when des_prev == 1 as well; see
3128 previous comment. */
3130 struct c_expr mexpr;
3131 c_parser_consume_token (parser);
3132 if (c_parser_peek_token (parser)->type == CPP_NAME
3133 && ((c_parser_peek_token (parser)->id_kind
3135 || (c_parser_peek_token (parser)->id_kind
3136 == C_ID_CLASSNAME)))
3138 /* Type name receiver. */
3139 tree id = c_parser_peek_token (parser)->value;
3140 c_parser_consume_token (parser);
3141 rec = objc_get_class_reference (id);
3142 goto parse_message_args;
3144 first = c_parser_expr_no_commas (parser, NULL).value;
3145 if (c_parser_next_token_is (parser, CPP_ELLIPSIS)
3146 || c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
3147 goto array_desig_after_first;
3148 /* Expression receiver. So far only one part
3149 without commas has been parsed; there might be
3150 more of the expression. */
3152 while (c_parser_next_token_is (parser, CPP_COMMA))
3155 c_parser_consume_token (parser);
3156 next = c_parser_expr_no_commas (parser, NULL);
3157 next = default_function_array_conversion (next);
3158 rec = build_compound_expr (rec, next.value);
3161 /* Now parse the objc-message-args. */
3162 args = c_parser_objc_message_args (parser);
3163 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
3166 = objc_build_message_expr (build_tree_list (rec, args));
3167 mexpr.original_code = ERROR_MARK;
3168 /* Now parse and process the remainder of the
3169 initializer, starting with this message
3170 expression as a primary-expression. */
3171 c_parser_initval (parser, &mexpr);
3174 c_parser_consume_token (parser);
3175 first = c_parser_expr_no_commas (parser, NULL).value;
3176 array_desig_after_first:
3177 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
3179 ellipsis_loc = c_parser_peek_token (parser)->location;
3180 c_parser_consume_token (parser);
3181 second = c_parser_expr_no_commas (parser, NULL).value;
3185 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
3187 c_parser_consume_token (parser);
3188 set_init_index (first, second);
3190 pedwarn (ellipsis_loc, OPT_pedantic,
3191 "ISO C forbids specifying range of elements to initialize");
3194 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
3200 if (c_parser_next_token_is (parser, CPP_EQ))
3203 pedwarn (des_loc, OPT_pedantic,
3204 "ISO C90 forbids specifying subobject to initialize");
3205 c_parser_consume_token (parser);
3210 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
3211 "obsolete use of designated initializer without %<=%>");
3215 init.value = error_mark_node;
3216 init.original_code = ERROR_MARK;
3217 c_parser_error (parser, "expected %<=%>");
3218 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
3219 process_init_element (init, false);
3225 c_parser_initval (parser, NULL);
3228 /* Parse a nested initializer; as c_parser_initializer but parses
3229 initializers within braced lists, after any designators have been
3230 applied. If AFTER is not NULL then it is an Objective-C message
3231 expression which is the primary-expression starting the
3235 c_parser_initval (c_parser *parser, struct c_expr *after)
3238 gcc_assert (!after || c_dialect_objc ());
3239 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE) && !after)
3240 init = c_parser_braced_init (parser, NULL_TREE, true);
3243 init = c_parser_expr_no_commas (parser, after);
3244 if (init.value != NULL_TREE
3245 && TREE_CODE (init.value) != STRING_CST
3246 && TREE_CODE (init.value) != COMPOUND_LITERAL_EXPR)
3247 init = default_function_array_conversion (init);
3249 process_init_element (init, false);
3252 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3256 { block-item-list[opt] }
3257 { label-declarations block-item-list }
3261 block-item-list block-item
3273 { label-declarations block-item-list }
3276 __extension__ nested-declaration
3277 nested-function-definition
3281 label-declarations label-declaration
3284 __label__ identifier-list ;
3286 Allowing the mixing of declarations and code is new in C99. The
3287 GNU syntax also permits (not shown above) labels at the end of
3288 compound statements, which yield an error. We don't allow labels
3289 on declarations; this might seem like a natural extension, but
3290 there would be a conflict between attributes on the label and
3291 prefix attributes on the declaration. ??? The syntax follows the
3292 old parser in requiring something after label declarations.
3293 Although they are erroneous if the labels declared aren't defined,
3294 is it useful for the syntax to be this way?
3306 c_parser_compound_statement (c_parser *parser)
3309 if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
3310 return error_mark_node;
3311 stmt = c_begin_compound_stmt (true);
3312 c_parser_compound_statement_nostart (parser);
3313 return c_end_compound_stmt (stmt, true);
3316 /* Parse a compound statement except for the opening brace. This is
3317 used for parsing both compound statements and statement expressions
3318 (which follow different paths to handling the opening). */
3321 c_parser_compound_statement_nostart (c_parser *parser)
3323 bool last_stmt = false;
3324 bool last_label = false;
3325 location_t label_loc = UNKNOWN_LOCATION; /* Quiet warning. */
3326 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3328 c_parser_consume_token (parser);
3331 if (c_parser_next_token_is_keyword (parser, RID_LABEL))
3333 location_t err_loc = c_parser_peek_token (parser)->location;
3334 /* Read zero or more forward-declarations for labels that nested
3335 functions can jump to. */
3336 while (c_parser_next_token_is_keyword (parser, RID_LABEL))
3338 c_parser_consume_token (parser);
3339 /* Any identifiers, including those declared as type names,
3344 if (c_parser_next_token_is_not (parser, CPP_NAME))
3346 c_parser_error (parser, "expected identifier");
3350 = declare_label (c_parser_peek_token (parser)->value);
3351 C_DECLARED_LABEL_FLAG (label) = 1;
3352 add_stmt (build_stmt (DECL_EXPR, label));
3353 c_parser_consume_token (parser);
3354 if (c_parser_next_token_is (parser, CPP_COMMA))
3355 c_parser_consume_token (parser);
3359 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
3361 pedwarn (err_loc, OPT_pedantic, "ISO C forbids label declarations");
3363 /* We must now have at least one statement, label or declaration. */
3364 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3366 c_parser_error (parser, "expected declaration or statement");
3367 c_parser_consume_token (parser);
3370 while (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE))
3372 location_t loc = c_parser_peek_token (parser)->location;
3373 if (c_parser_next_token_is_keyword (parser, RID_CASE)
3374 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3375 || (c_parser_next_token_is (parser, CPP_NAME)
3376 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3378 if (c_parser_next_token_is_keyword (parser, RID_CASE))
3379 label_loc = c_parser_peek_2nd_token (parser)->location;
3381 label_loc = c_parser_peek_token (parser)->location;
3384 c_parser_label (parser);
3386 else if (!last_label
3387 && c_parser_next_token_starts_declspecs (parser))
3390 c_parser_declaration_or_fndef (parser, true, true, true, true);
3393 (pedantic && !flag_isoc99)
3395 : OPT_Wdeclaration_after_statement,
3396 "ISO C90 forbids mixed declarations and code");
3399 else if (!last_label
3400 && c_parser_next_token_is_keyword (parser, RID_EXTENSION))
3402 /* __extension__ can start a declaration, but is also an
3403 unary operator that can start an expression. Consume all
3404 but the last of a possible series of __extension__ to
3406 while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD
3407 && (c_parser_peek_2nd_token (parser)->keyword
3409 c_parser_consume_token (parser);
3410 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser)))
3413 ext = disable_extension_diagnostics ();
3414 c_parser_consume_token (parser);
3416 c_parser_declaration_or_fndef (parser, true, true, true, true);
3417 /* Following the old parser, __extension__ does not
3418 disable this diagnostic. */
3419 restore_extension_diagnostics (ext);
3421 pedwarn_c90 (loc, (pedantic && !flag_isoc99)
3423 : OPT_Wdeclaration_after_statement,
3424 "ISO C90 forbids mixed declarations and code");
3430 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
3432 /* External pragmas, and some omp pragmas, are not associated
3433 with regular c code, and so are not to be considered statements
3434 syntactically. This ensures that the user doesn't put them
3435 places that would turn into syntax errors if the directive
3437 if (c_parser_pragma (parser, pragma_compound))
3438 last_label = false, last_stmt = true;
3440 else if (c_parser_next_token_is (parser, CPP_EOF))
3442 c_parser_error (parser, "expected declaration or statement");
3445 else if (c_parser_next_token_is_keyword (parser, RID_ELSE))
3447 if (parser->in_if_block)
3449 error_at (loc, """expected %<}%> before %<else%>");
3454 error_at (loc, "%<else%> without a previous %<if%>");
3455 c_parser_consume_token (parser);
3464 c_parser_statement_after_labels (parser);
3467 parser->error = false;
3470 error_at (label_loc, "label at end of compound statement");
3471 c_parser_consume_token (parser);
3474 /* Parse a label (C90 6.6.1, C99 6.8.1).
3477 identifier : attributes[opt]
3478 case constant-expression :
3484 case constant-expression ... constant-expression :
3486 The use of attributes on labels is a GNU extension. The syntax in
3487 GNU C accepts any expressions without commas, non-constant
3488 expressions being rejected later. */
3491 c_parser_label (c_parser *parser)
3493 location_t loc1 = c_parser_peek_token (parser)->location;
3494 tree label = NULL_TREE;
3495 if (c_parser_next_token_is_keyword (parser, RID_CASE))
3498 c_parser_consume_token (parser);
3499 exp1 = c_parser_expr_no_commas (parser, NULL).value;
3500 if (c_parser_next_token_is (parser, CPP_COLON))
3502 c_parser_consume_token (parser);
3503 label = do_case (exp1, NULL_TREE);
3505 else if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
3507 c_parser_consume_token (parser);
3508 exp2 = c_parser_expr_no_commas (parser, NULL).value;
3509 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
3510 label = do_case (exp1, exp2);
3513 c_parser_error (parser, "expected %<:%> or %<...%>");
3515 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
3517 c_parser_consume_token (parser);
3518 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
3519 label = do_case (NULL_TREE, NULL_TREE);
3523 tree name = c_parser_peek_token (parser)->value;
3526 location_t loc2 = c_parser_peek_token (parser)->location;
3527 gcc_assert (c_parser_next_token_is (parser, CPP_NAME));
3528 c_parser_consume_token (parser);
3529 gcc_assert (c_parser_next_token_is (parser, CPP_COLON));
3530 c_parser_consume_token (parser);
3531 attrs = c_parser_attributes (parser);
3532 tlab = define_label (loc2, name);
3535 decl_attributes (&tlab, attrs, 0);
3536 label = add_stmt (build_stmt (LABEL_EXPR, tlab));
3541 SET_EXPR_LOCATION (label, loc1);
3542 if (c_parser_next_token_starts_declspecs (parser)
3543 && !(c_parser_next_token_is (parser, CPP_NAME)
3544 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3546 error_at (c_parser_peek_token (parser)->location,
3547 "a label can only be part of a statement and "
3548 "a declaration is not a statement");
3549 c_parser_declaration_or_fndef (parser, /*fndef_ok*/ false,
3550 /*nested*/ true, /*empty_ok*/ false,
3551 /*start_attr_ok*/ true);
3556 /* Parse a statement (C90 6.6, C99 6.8).
3561 expression-statement
3569 expression-statement:
3572 selection-statement:
3576 iteration-statement:
3585 return expression[opt] ;
3598 objc-throw-statement
3599 objc-try-catch-statement
3600 objc-synchronized-statement
3602 objc-throw-statement:
3616 parallel-for-construct
3617 parallel-sections-construct
3624 parallel-directive structured-block
3627 for-directive iteration-statement
3630 sections-directive section-scope
3633 single-directive structured-block
3635 parallel-for-construct:
3636 parallel-for-directive iteration-statement
3638 parallel-sections-construct:
3639 parallel-sections-directive section-scope
3642 master-directive structured-block
3645 critical-directive structured-block
3648 atomic-directive expression-statement
3651 ordered-directive structured-block */
3654 c_parser_statement (c_parser *parser)
3656 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3657 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3658 || (c_parser_next_token_is (parser, CPP_NAME)
3659 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3660 c_parser_label (parser);
3661 c_parser_statement_after_labels (parser);
3664 /* Parse a statement, other than a labeled statement. */
3667 c_parser_statement_after_labels (c_parser *parser)
3669 location_t loc = c_parser_peek_token (parser)->location;
3670 tree stmt = NULL_TREE;
3671 bool in_if_block = parser->in_if_block;
3672 parser->in_if_block = false;
3673 switch (c_parser_peek_token (parser)->type)
3675 case CPP_OPEN_BRACE:
3676 add_stmt (c_parser_compound_statement (parser));
3679 switch (c_parser_peek_token (parser)->keyword)
3682 c_parser_if_statement (parser);
3685 c_parser_switch_statement (parser);
3688 c_parser_while_statement (parser);
3691 c_parser_do_statement (parser);
3694 c_parser_for_statement (parser);
3697 c_parser_consume_token (parser);
3698 if (c_parser_next_token_is (parser, CPP_NAME))
3700 stmt = c_finish_goto_label (c_parser_peek_token (parser)->value);
3701 c_parser_consume_token (parser);
3703 else if (c_parser_next_token_is (parser, CPP_MULT))
3705 c_parser_consume_token (parser);
3706 stmt = c_finish_goto_ptr (c_parser_expression (parser).value);
3709 c_parser_error (parser, "expected identifier or %<*%>");
3710 goto expect_semicolon;
3712 c_parser_consume_token (parser);
3713 stmt = c_finish_bc_stmt (&c_cont_label, false);
3714 goto expect_semicolon;
3716 c_parser_consume_token (parser);
3717 stmt = c_finish_bc_stmt (&c_break_label, true);
3718 goto expect_semicolon;
3720 c_parser_consume_token (parser);
3721 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3723 stmt = c_finish_return (NULL_TREE);
3724 c_parser_consume_token (parser);
3728 stmt = c_finish_return (c_parser_expression_conv (parser).value);
3729 goto expect_semicolon;
3733 stmt = c_parser_asm_statement (parser);
3736 gcc_assert (c_dialect_objc ());
3737 c_parser_consume_token (parser);
3738 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3740 stmt = objc_build_throw_stmt (NULL_TREE);
3741 c_parser_consume_token (parser);
3746 = objc_build_throw_stmt (c_parser_expression (parser).value);
3747 goto expect_semicolon;
3751 gcc_assert (c_dialect_objc ());
3752 c_parser_objc_try_catch_statement (parser);
3754 case RID_AT_SYNCHRONIZED:
3755 gcc_assert (c_dialect_objc ());
3756 c_parser_objc_synchronized_statement (parser);
3763 c_parser_consume_token (parser);
3765 case CPP_CLOSE_PAREN:
3766 case CPP_CLOSE_SQUARE:
3767 /* Avoid infinite loop in error recovery:
3768 c_parser_skip_until_found stops at a closing nesting
3769 delimiter without consuming it, but here we need to consume
3770 it to proceed further. */
3771 c_parser_error (parser, "expected statement");
3772 c_parser_consume_token (parser);
3775 c_parser_pragma (parser, pragma_stmt);
3779 stmt = c_finish_expr_stmt (c_parser_expression_conv (parser).value);
3781 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
3784 /* Two cases cannot and do not have line numbers associated: If stmt
3785 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3786 cannot hold line numbers. But that's OK because the statement
3787 will either be changed to a MODIFY_EXPR during gimplification of
3788 the statement expr, or discarded. If stmt was compound, but
3789 without new variables, we will have skipped the creation of a
3790 BIND and will have a bare STATEMENT_LIST. But that's OK because
3791 (recursively) all of the component statements should already have
3792 line numbers assigned. ??? Can we discard no-op statements
3794 protected_set_expr_location (stmt, loc);
3796 parser->in_if_block = in_if_block;
3799 /* Parse the condition from an if, do, while or for statements. */
3802 c_parser_condition (c_parser *parser)
3806 loc = c_parser_peek_token (parser)->location;
3807 cond = c_objc_common_truthvalue_conversion
3808 (loc, c_parser_expression_conv (parser).value);
3809 protected_set_expr_location (cond, loc);
3810 if (warn_sequence_point)
3811 verify_sequence_points (cond);
3815 /* Parse a parenthesized condition from an if, do or while statement.
3821 c_parser_paren_condition (c_parser *parser)
3824 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3825 return error_mark_node;
3826 cond = c_parser_condition (parser);
3827 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
3831 /* Parse a statement which is a block in C99. */
3834 c_parser_c99_block_statement (c_parser *parser)
3836 tree block = c_begin_compound_stmt (flag_isoc99);
3837 c_parser_statement (parser);
3838 return c_end_compound_stmt (block, flag_isoc99);
3841 /* Parse the body of an if statement. This is just parsing a
3842 statement but (a) it is a block in C99, (b) we track whether the
3843 body is an if statement for the sake of -Wparentheses warnings, (c)
3844 we handle an empty body specially for the sake of -Wempty-body
3845 warnings, and (d) we call parser_compound_statement directly
3846 because c_parser_statement_after_labels resets
3847 parser->in_if_block. */
3850 c_parser_if_body (c_parser *parser, bool *if_p)
3852 tree block = c_begin_compound_stmt (flag_isoc99);
3853 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3854 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3855 || (c_parser_next_token_is (parser, CPP_NAME)
3856 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3857 c_parser_label (parser);
3858 *if_p = c_parser_next_token_is_keyword (parser, RID_IF);
3859 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3861 location_t loc = c_parser_peek_token (parser)->location;
3862 add_stmt (build_empty_stmt ());
3863 c_parser_consume_token (parser);
3864 if (!c_parser_next_token_is_keyword (parser, RID_ELSE))
3865 warning_at (loc, OPT_Wempty_body,
3866 "suggest braces around empty body in an %<if%> statement");
3868 else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
3869 add_stmt (c_parser_compound_statement (parser));
3871 c_parser_statement_after_labels (parser);
3872 return c_end_compound_stmt (block, flag_isoc99);
3875 /* Parse the else body of an if statement. This is just parsing a
3876 statement but (a) it is a block in C99, (b) we handle an empty body
3877 specially for the sake of -Wempty-body warnings. */
3880 c_parser_else_body (c_parser *parser)
3882 tree block = c_begin_compound_stmt (flag_isoc99);
3883 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3884 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3885 || (c_parser_next_token_is (parser, CPP_NAME)
3886 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3887 c_parser_label (parser);
3888 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3890 warning_at (c_parser_peek_token (parser)->location,
3892 "suggest braces around empty body in an %<else%> statement");
3893 add_stmt (build_empty_stmt ());
3894 c_parser_consume_token (parser);
3897 c_parser_statement_after_labels (parser);
3898 return c_end_compound_stmt (block, flag_isoc99);
3901 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3904 if ( expression ) statement
3905 if ( expression ) statement else statement
3909 c_parser_if_statement (c_parser *parser)
3914 bool first_if = false;
3915 tree first_body, second_body;
3918 gcc_assert (c_parser_next_token_is_keyword (parser, RID_IF));
3919 c_parser_consume_token (parser);
3920 block = c_begin_compound_stmt (flag_isoc99);
3921 loc = c_parser_peek_token (parser)->location;
3922 cond = c_parser_paren_condition (parser);
3923 in_if_block = parser->in_if_block;
3924 parser->in_if_block = true;
3925 first_body = c_parser_if_body (parser, &first_if);
3926 parser->in_if_block = in_if_block;
3927 if (c_parser_next_token_is_keyword (parser, RID_ELSE))
3929 c_parser_consume_token (parser);
3930 second_body = c_parser_else_body (parser);
3933 second_body = NULL_TREE;
3934 c_finish_if_stmt (loc, cond, first_body, second_body, first_if);
3935 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3938 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3941 switch (expression) statement
3945 c_parser_switch_statement (c_parser *parser)
3947 tree block, expr, body, save_break;
3948 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SWITCH));
3949 c_parser_consume_token (parser);
3950 block = c_begin_compound_stmt (flag_isoc99);
3951 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3953 expr = c_parser_expression (parser).value;
3954 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
3957 expr = error_mark_node;
3958 c_start_case (expr);
3959 save_break = c_break_label;
3960 c_break_label = NULL_TREE;
3961 body = c_parser_c99_block_statement (parser);
3962 c_finish_case (body);
3964 add_stmt (build1 (LABEL_EXPR, void_type_node, c_break_label));
3965 c_break_label = save_break;
3966 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3969 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
3972 while (expression) statement
3976 c_parser_while_statement (c_parser *parser)
3978 tree block, cond, body, save_break, save_cont;
3980 gcc_assert (c_parser_next_token_is_keyword (parser, RID_WHILE));
3981 c_parser_consume_token (parser);
3982 block = c_begin_compound_stmt (flag_isoc99);
3983 loc = c_parser_peek_token (parser)->location;
3984 cond = c_parser_paren_condition (parser);
3985 save_break = c_break_label;
3986 c_break_label = NULL_TREE;
3987 save_cont = c_cont_label;
3988 c_cont_label = NULL_TREE;
3989 body = c_parser_c99_block_statement (parser);
3990 c_finish_loop (loc, cond, NULL, body, c_break_label, c_cont_label, true);
3991 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3992 c_break_label = save_break;
3993 c_cont_label = save_cont;
3996 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
3999 do statement while ( expression ) ;
4003 c_parser_do_statement (c_parser *parser)
4005 tree block, cond, body, save_break, save_cont, new_break, new_cont;
4007 gcc_assert (c_parser_next_token_is_keyword (parser, RID_DO));
4008 c_parser_consume_token (parser);
4009 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4010 warning_at (c_parser_peek_token (parser)->location,
4012 "suggest braces around empty body in %<do%> statement");
4013 block = c_begin_compound_stmt (flag_isoc99);
4014 loc = c_parser_peek_token (parser)->location;
4015 save_break = c_break_label;
4016 c_break_label = NULL_TREE;
4017 save_cont = c_cont_label;
4018 c_cont_label = NULL_TREE;
4019 body = c_parser_c99_block_statement (parser);
4020 c_parser_require_keyword (parser, RID_WHILE, "expected %<while%>");
4021 new_break = c_break_label;
4022 c_break_label = save_break;
4023 new_cont = c_cont_label;
4024 c_cont_label = save_cont;
4025 cond = c_parser_paren_condition (parser);
4026 if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
4027 c_parser_skip_to_end_of_block_or_statement (parser);
4028 c_finish_loop (loc, cond, NULL, body, new_break, new_cont, false);
4029 add_stmt (c_end_compound_stmt (block, flag_isoc99));
4032 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4035 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4036 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4038 The form with a declaration is new in C99.
4040 ??? In accordance with the old parser, the declaration may be a
4041 nested function, which is then rejected in check_for_loop_decls,
4042 but does it make any sense for this to be included in the grammar?
4043 Note in particular that the nested function does not include a
4044 trailing ';', whereas the "declaration" production includes one.
4045 Also, can we reject bad declarations earlier and cheaper than
4046 check_for_loop_decls? */
4049 c_parser_for_statement (c_parser *parser)
4051 tree block, cond, incr, save_break, save_cont, body;
4053 gcc_assert (c_parser_next_token_is_keyword (parser, RID_FOR));
4054 loc = c_parser_peek_token (parser)->location;
4055 c_parser_consume_token (parser);
4056 block = c_begin_compound_stmt (flag_isoc99);
4057 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4059 /* Parse the initialization declaration or expression. */
4060 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4062 c_parser_consume_token (parser);
4063 c_finish_expr_stmt (NULL_TREE);
4065 else if (c_parser_next_token_starts_declspecs (parser))
4067 c_parser_declaration_or_fndef (parser, true, true, true, true);
4068 check_for_loop_decls ();
4070 else if (c_parser_next_token_is_keyword (parser, RID_EXTENSION))
4072 /* __extension__ can start a declaration, but is also an
4073 unary operator that can start an expression. Consume all
4074 but the last of a possible series of __extension__ to
4076 while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD
4077 && (c_parser_peek_2nd_token (parser)->keyword
4079 c_parser_consume_token (parser);
4080 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser)))
4083 ext = disable_extension_diagnostics ();
4084 c_parser_consume_token (parser);
4085 c_parser_declaration_or_fndef (parser, true, true, true, true);
4086 restore_extension_diagnostics (ext);
4087 check_for_loop_decls ();
4095 c_finish_expr_stmt (c_parser_expression (parser).value);
4096 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4098 /* Parse the loop condition. */
4099 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4101 c_parser_consume_token (parser);
4106 cond = c_parser_condition (parser);
4107 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4109 /* Parse the increment expression. */
4110 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4111 incr = c_process_expr_stmt (NULL_TREE);
4113 incr = c_process_expr_stmt (c_parser_expression (parser).value);
4114 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4118 cond = error_mark_node;
4119 incr = error_mark_node;
4121 save_break = c_break_label;
4122 c_break_label = NULL_TREE;
4123 save_cont = c_cont_label;
4124 c_cont_label = NULL_TREE;
4125 body = c_parser_c99_block_statement (parser);
4126 c_finish_loop (loc, cond, incr, body, c_break_label, c_cont_label, true);
4127 add_stmt (c_end_compound_stmt (block, flag_isoc99));
4128 c_break_label = save_break;
4129 c_cont_label = save_cont;
4132 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4133 statement with inputs, outputs, clobbers, and volatile tag
4137 asm type-qualifier[opt] ( asm-argument ) ;
4141 asm-string-literal : asm-operands[opt]
4142 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4143 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4145 Qualifiers other than volatile are accepted in the syntax but
4149 c_parser_asm_statement (c_parser *parser)
4151 tree quals, str, outputs, inputs, clobbers, ret;
4153 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM));
4154 c_parser_consume_token (parser);
4155 if (c_parser_next_token_is_keyword (parser, RID_VOLATILE))
4157 quals = c_parser_peek_token (parser)->value;
4158 c_parser_consume_token (parser);
4160 else if (c_parser_next_token_is_keyword (parser, RID_CONST)
4161 || c_parser_next_token_is_keyword (parser, RID_RESTRICT))
4163 warning_at (c_parser_peek_token (parser)->location,
4165 "%E qualifier ignored on asm",
4166 c_parser_peek_token (parser)->value);
4168 c_parser_consume_token (parser);
4172 /* ??? Follow the C++ parser rather than using the
4173 lex_untranslated_string kludge. */
4174 parser->lex_untranslated_string = true;
4175 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4177 parser->lex_untranslated_string = false;
4180 str = c_parser_asm_string_literal (parser);
4181 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4184 outputs = NULL_TREE;
4186 clobbers = NULL_TREE;
4189 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4191 parser->lex_untranslated_string = false;
4192 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4196 /* Parse outputs. */
4197 if (c_parser_next_token_is (parser, CPP_COLON)
4198 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4199 outputs = NULL_TREE;
4201 outputs = c_parser_asm_operands (parser, false);
4202 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4205 clobbers = NULL_TREE;
4208 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4210 parser->lex_untranslated_string = false;
4211 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4215 if (c_parser_next_token_is (parser, CPP_COLON)
4216 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4219 inputs = c_parser_asm_operands (parser, true);
4220 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4222 clobbers = NULL_TREE;
4225 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4227 parser->lex_untranslated_string = false;
4228 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4231 /* Parse clobbers. */
4232 clobbers = c_parser_asm_clobbers (parser);
4234 parser->lex_untranslated_string = false;
4235 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
4237 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4240 if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
4241 c_parser_skip_to_end_of_block_or_statement (parser);
4242 ret = build_asm_stmt (quals, build_asm_expr (str, outputs, inputs,
4247 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4248 not outputs), apply the default conversion of functions and arrays
4253 asm-operands , asm-operand
4256 asm-string-literal ( expression )
4257 [ identifier ] asm-string-literal ( expression )
4261 c_parser_asm_operands (c_parser *parser, bool convert_p)
4263 tree list = NULL_TREE;
4268 if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
4270 c_parser_consume_token (parser);
4271 if (c_parser_next_token_is (parser, CPP_NAME))
4273 tree id = c_parser_peek_token (parser)->value;
4274 c_parser_consume_token (parser);
4275 name = build_string (IDENTIFIER_LENGTH (id),
4276 IDENTIFIER_POINTER (id));
4280 c_parser_error (parser, "expected identifier");
4281 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, NULL);
4284 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
4289 str = c_parser_asm_string_literal (parser);
4290 if (str == NULL_TREE)
4292 parser->lex_untranslated_string = false;
4293 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4295 parser->lex_untranslated_string = true;
4298 expr = c_parser_expression (parser);
4300 expr = default_function_array_conversion (expr);
4301 parser->lex_untranslated_string = true;
4302 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
4304 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4307 list = chainon (list, build_tree_list (build_tree_list (name, str),
4309 if (c_parser_next_token_is (parser, CPP_COMMA))
4310 c_parser_consume_token (parser);
4317 /* Parse asm clobbers, a GNU extension.
4321 asm-clobbers , asm-string-literal
4325 c_parser_asm_clobbers (c_parser *parser)
4327 tree list = NULL_TREE;
4330 tree str = c_parser_asm_string_literal (parser);
4332 list = tree_cons (NULL_TREE, str, list);
4335 if (c_parser_next_token_is (parser, CPP_COMMA))
4336 c_parser_consume_token (parser);
4343 /* Parse an expression other than a compound expression; that is, an
4344 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4345 NULL then it is an Objective-C message expression which is the
4346 primary-expression starting the expression as an initializer.
4348 assignment-expression:
4349 conditional-expression
4350 unary-expression assignment-operator assignment-expression
4352 assignment-operator: one of
4353 = *= /= %= += -= <<= >>= &= ^= |=
4355 In GNU C we accept any conditional expression on the LHS and
4356 diagnose the invalid lvalue rather than producing a syntax
4359 static struct c_expr
4360 c_parser_expr_no_commas (c_parser *parser, struct c_expr *after)
4362 struct c_expr lhs, rhs, ret;
4363 enum tree_code code;
4364 location_t op_location;
4365 gcc_assert (!after || c_dialect_objc ());
4366 lhs = c_parser_conditional_expression (parser, after);
4367 op_location = c_parser_peek_token (parser)->location;
4368 switch (c_parser_peek_token (parser)->type)
4377 code = TRUNC_DIV_EXPR;
4380 code = TRUNC_MOD_EXPR;
4395 code = BIT_AND_EXPR;
4398 code = BIT_XOR_EXPR;
4401 code = BIT_IOR_EXPR;
4406 c_parser_consume_token (parser);
4407 rhs = c_parser_expr_no_commas (parser, NULL);
4408 rhs = default_function_array_conversion (rhs);
4409 ret.value = build_modify_expr (op_location, lhs.value, code, rhs.value);
4410 if (code == NOP_EXPR)
4411 ret.original_code = MODIFY_EXPR;
4414 TREE_NO_WARNING (ret.value) = 1;
4415 ret.original_code = ERROR_MARK;
4420 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4421 is not NULL then it is an Objective-C message expression which is
4422 the primary-expression starting the expression as an initializer.
4424 conditional-expression:
4425 logical-OR-expression
4426 logical-OR-expression ? expression : conditional-expression
4430 conditional-expression:
4431 logical-OR-expression ? : conditional-expression
4434 static struct c_expr
4435 c_parser_conditional_expression (c_parser *parser, struct c_expr *after)
4437 struct c_expr cond, exp1, exp2, ret;
4438 location_t cond_loc;
4440 gcc_assert (!after || c_dialect_objc ());
4442 cond_loc = c_parser_peek_token (parser)->location;
4443 cond = c_parser_binary_expression (parser, after);
4444 protected_set_expr_location (cond.value, cond_loc);
4446 if (c_parser_next_token_is_not (parser, CPP_QUERY))
4448 cond = default_function_array_conversion (cond);
4449 c_parser_consume_token (parser);
4450 if (c_parser_next_token_is (parser, CPP_COLON))
4452 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
4453 "ISO C forbids omitting the middle term of a ?: expression");
4454 /* Make sure first operand is calculated only once. */
4455 exp1.value = save_expr (default_conversion (cond.value));
4456 cond.value = c_objc_common_truthvalue_conversion (cond_loc, exp1.value);
4457 skip_evaluation += cond.value == truthvalue_true_node;
4462 = c_objc_common_truthvalue_conversion
4463 (cond_loc, default_conversion (cond.value));
4464 skip_evaluation += cond.value == truthvalue_false_node;
4465 exp1 = c_parser_expression_conv (parser);
4466 skip_evaluation += ((cond.value == truthvalue_true_node)
4467 - (cond.value == truthvalue_false_node));
4469 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
4471 skip_evaluation -= cond.value == truthvalue_true_node;
4472 ret.value = error_mark_node;
4473 ret.original_code = ERROR_MARK;
4476 exp2 = c_parser_conditional_expression (parser, NULL);
4477 exp2 = default_function_array_conversion (exp2);
4478 skip_evaluation -= cond.value == truthvalue_true_node;
4479 ret.value = build_conditional_expr (cond.value, exp1.value, exp2.value);
4480 ret.original_code = ERROR_MARK;
4484 /* Parse a binary expression; that is, a logical-OR-expression (C90
4485 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4486 an Objective-C message expression which is the primary-expression
4487 starting the expression as an initializer.
4489 multiplicative-expression:
4491 multiplicative-expression * cast-expression
4492 multiplicative-expression / cast-expression
4493 multiplicative-expression % cast-expression
4495 additive-expression:
4496 multiplicative-expression
4497 additive-expression + multiplicative-expression
4498 additive-expression - multiplicative-expression
4502 shift-expression << additive-expression
4503 shift-expression >> additive-expression
4505 relational-expression:
4507 relational-expression < shift-expression
4508 relational-expression > shift-expression
4509 relational-expression <= shift-expression
4510 relational-expression >= shift-expression
4512 equality-expression:
4513 relational-expression
4514 equality-expression == relational-expression
4515 equality-expression != relational-expression
4519 AND-expression & equality-expression
4521 exclusive-OR-expression:
4523 exclusive-OR-expression ^ AND-expression
4525 inclusive-OR-expression:
4526 exclusive-OR-expression
4527 inclusive-OR-expression | exclusive-OR-expression
4529 logical-AND-expression:
4530 inclusive-OR-expression
4531 logical-AND-expression && inclusive-OR-expression
4533 logical-OR-expression:
4534 logical-AND-expression
4535 logical-OR-expression || logical-AND-expression
4538 static struct c_expr
4539 c_parser_binary_expression (c_parser *parser, struct c_expr *after)
4541 /* A binary expression is parsed using operator-precedence parsing,
4542 with the operands being cast expressions. All the binary
4543 operators are left-associative. Thus a binary expression is of
4546 E0 op1 E1 op2 E2 ...
4548 which we represent on a stack. On the stack, the precedence
4549 levels are strictly increasing. When a new operator is
4550 encountered of higher precedence than that at the top of the
4551 stack, it is pushed; its LHS is the top expression, and its RHS
4552 is everything parsed until it is popped. When a new operator is
4553 encountered with precedence less than or equal to that at the top
4554 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4555 by the result of the operation until the operator at the top of
4556 the stack has lower precedence than the new operator or there is
4557 only one element on the stack; then the top expression is the LHS
4558 of the new operator. In the case of logical AND and OR
4559 expressions, we also need to adjust skip_evaluation as
4560 appropriate when the operators are pushed and popped. */
4562 /* The precedence levels, where 0 is a dummy lowest level used for
4563 the bottom of the stack. */
4579 /* The expression at this stack level. */
4581 /* The precedence of the operator on its left, PREC_NONE at the
4582 bottom of the stack. */
4584 /* The operation on its left. */
4588 /* Location of the binary operator. */
4589 location_t binary_loc = UNKNOWN_LOCATION; /* Quiet warning. */
4592 switch (stack[sp].op) \
4594 case TRUTH_ANDIF_EXPR: \
4595 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4597 case TRUTH_ORIF_EXPR: \
4598 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4603 stack[sp - 1].expr \
4604 = default_function_array_conversion (stack[sp - 1].expr); \
4606 = default_function_array_conversion (stack[sp].expr); \
4607 stack[sp - 1].expr = parser_build_binary_op (binary_loc, \
4609 stack[sp - 1].expr, \
4613 gcc_assert (!after || c_dialect_objc ());
4614 stack[0].expr = c_parser_cast_expression (parser, after);
4615 stack[0].prec = PREC_NONE;
4620 enum tree_code ocode;
4623 switch (c_parser_peek_token (parser)->type)
4631 ocode = TRUNC_DIV_EXPR;
4635 ocode = TRUNC_MOD_EXPR;
4647 ocode = LSHIFT_EXPR;
4651 ocode = RSHIFT_EXPR;
4665 case CPP_GREATER_EQ:
4678 oprec = PREC_BITAND;
4679 ocode = BIT_AND_EXPR;
4682 oprec = PREC_BITXOR;
4683 ocode = BIT_XOR_EXPR;
4687 ocode = BIT_IOR_EXPR;
4690 oprec = PREC_LOGAND;
4691 ocode = TRUTH_ANDIF_EXPR;
4695 ocode = TRUTH_ORIF_EXPR;
4698 /* Not a binary operator, so end of the binary
4702 binary_loc = c_parser_peek_token (parser)->location;
4703 c_parser_consume_token (parser);
4704 while (oprec <= stack[sp].prec)
4708 case TRUTH_ANDIF_EXPR:
4710 = default_function_array_conversion (stack[sp].expr);
4711 stack[sp].expr.value = c_objc_common_truthvalue_conversion
4712 (binary_loc, default_conversion (stack[sp].expr.value));
4713 skip_evaluation += stack[sp].expr.value == truthvalue_false_node;
4715 case TRUTH_ORIF_EXPR:
4717 = default_function_array_conversion (stack[sp].expr);
4718 stack[sp].expr.value = c_objc_common_truthvalue_conversion
4719 (binary_loc, default_conversion (stack[sp].expr.value));
4720 skip_evaluation += stack[sp].expr.value == truthvalue_true_node;
4726 stack[sp].expr = c_parser_cast_expression (parser, NULL);
4727 stack[sp].prec = oprec;
4728 stack[sp].op = ocode;
4733 return stack[0].expr;
4737 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4738 NULL then it is an Objective-C message expression which is the
4739 primary-expression starting the expression as an initializer.
4743 ( type-name ) unary-expression
4746 static struct c_expr
4747 c_parser_cast_expression (c_parser *parser, struct c_expr *after)
4749 gcc_assert (!after || c_dialect_objc ());
4751 return c_parser_postfix_expression_after_primary (parser, *after);
4752 /* If the expression begins with a parenthesized type name, it may
4753 be either a cast or a compound literal; we need to see whether
4754 the next character is '{' to tell the difference. If not, it is
4755 an unary expression. */
4756 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4757 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4759 struct c_type_name *type_name;
4762 c_parser_consume_token (parser);
4763 type_name = c_parser_type_name (parser);
4764 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4765 if (type_name == NULL)
4767 ret.value = error_mark_node;
4768 ret.original_code = ERROR_MARK;
4772 /* Save casted types in the function's used types hash table. */
4773 used_types_insert (type_name->specs->type);
4775 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4776 return c_parser_postfix_expression_after_paren_type (parser,
4778 expr = c_parser_cast_expression (parser, NULL);
4779 expr = default_function_array_conversion (expr);
4780 ret.value = c_cast_expr (type_name, expr.value);
4781 ret.original_code = ERROR_MARK;
4785 return c_parser_unary_expression (parser);
4788 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4794 unary-operator cast-expression
4795 sizeof unary-expression
4796 sizeof ( type-name )
4798 unary-operator: one of
4804 __alignof__ unary-expression
4805 __alignof__ ( type-name )
4808 unary-operator: one of
4809 __extension__ __real__ __imag__
4811 In addition, the GNU syntax treats ++ and -- as unary operators, so
4812 they may be applied to cast expressions with errors for non-lvalues
4815 static struct c_expr
4816 c_parser_unary_expression (c_parser *parser)
4819 struct c_expr ret, op;
4820 location_t loc = c_parser_peek_token (parser)->location;
4821 switch (c_parser_peek_token (parser)->type)
4824 c_parser_consume_token (parser);
4825 op = c_parser_cast_expression (parser, NULL);
4826 op = default_function_array_conversion (op);
4827 return parser_build_unary_op (PREINCREMENT_EXPR, op, loc);
4828 case CPP_MINUS_MINUS:
4829 c_parser_consume_token (parser);
4830 op = c_parser_cast_expression (parser, NULL);
4831 op = default_function_array_conversion (op);
4832 return parser_build_unary_op (PREDECREMENT_EXPR, op, loc);
4834 c_parser_consume_token (parser);
4835 return parser_build_unary_op (ADDR_EXPR,
4836 c_parser_cast_expression (parser, NULL),
4839 c_parser_consume_token (parser);
4840 op = c_parser_cast_expression (parser, NULL);
4841 op = default_function_array_conversion (op);
4842 ret.value = build_indirect_ref (loc, op.value, "unary *");
4843 ret.original_code = ERROR_MARK;
4846 if (!c_dialect_objc () && !in_system_header)
4847 warning_at (c_parser_peek_token (parser)->location,
4849 "traditional C rejects the unary plus operator");
4850 c_parser_consume_token (parser);
4851 op = c_parser_cast_expression (parser, NULL);
4852 op = default_function_array_conversion (op);
4853 return parser_build_unary_op (CONVERT_EXPR, op, loc);
4855 c_parser_consume_token (parser);
4856 op = c_parser_cast_expression (parser, NULL);
4857 op = default_function_array_conversion (op);
4858 return parser_build_unary_op (NEGATE_EXPR, op, loc);
4860 c_parser_consume_token (parser);
4861 op = c_parser_cast_expression (parser, NULL);
4862 op = default_function_array_conversion (op);
4863 return parser_build_unary_op (BIT_NOT_EXPR, op, loc);
4865 c_parser_consume_token (parser);
4866 op = c_parser_cast_expression (parser, NULL);
4867 op = default_function_array_conversion (op);
4868 return parser_build_unary_op (TRUTH_NOT_EXPR, op, loc);
4870 /* Refer to the address of a label as a pointer. */
4871 c_parser_consume_token (parser);
4872 if (c_parser_next_token_is (parser, CPP_NAME))
4874 ret.value = finish_label_address_expr
4875 (c_parser_peek_token (parser)->value, loc);
4876 c_parser_consume_token (parser);
4880 c_parser_error (parser, "expected identifier");
4881 ret.value = error_mark_node;
4883 ret.original_code = ERROR_MARK;
4886 switch (c_parser_peek_token (parser)->keyword)
4889 return c_parser_sizeof_expression (parser);
4891 return c_parser_alignof_expression (parser);
4893 c_parser_consume_token (parser);
4894 ext = disable_extension_diagnostics ();
4895 ret = c_parser_cast_expression (parser, NULL);
4896 restore_extension_diagnostics (ext);
4899 c_parser_consume_token (parser);
4900 op = c_parser_cast_expression (parser, NULL);
4901 op = default_function_array_conversion (op);
4902 return parser_build_unary_op (REALPART_EXPR, op, loc);
4904 c_parser_consume_token (parser);
4905 op = c_parser_cast_expression (parser, NULL);
4906 op = default_function_array_conversion (op);
4907 return parser_build_unary_op (IMAGPART_EXPR, op, loc);
4909 return c_parser_postfix_expression (parser);
4912 return c_parser_postfix_expression (parser);
4916 /* Parse a sizeof expression. */
4918 static struct c_expr
4919 c_parser_sizeof_expression (c_parser *parser)
4922 location_t expr_loc;
4923 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SIZEOF));
4924 c_parser_consume_token (parser);
4927 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4928 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4930 /* Either sizeof ( type-name ) or sizeof unary-expression
4931 starting with a compound literal. */
4932 struct c_type_name *type_name;
4933 c_parser_consume_token (parser);
4934 expr_loc = c_parser_peek_token (parser)->location;
4935 type_name = c_parser_type_name (parser);
4936 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4937 if (type_name == NULL)
4942 ret.value = error_mark_node;
4943 ret.original_code = ERROR_MARK;
4946 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4948 expr = c_parser_postfix_expression_after_paren_type (parser,
4952 /* sizeof ( type-name ). */
4955 return c_expr_sizeof_type (type_name);
4959 expr_loc = c_parser_peek_token (parser)->location;
4960 expr = c_parser_unary_expression (parser);
4964 if (TREE_CODE (expr.value) == COMPONENT_REF
4965 && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1)))
4966 error_at (expr_loc, "%<sizeof%> applied to a bit-field");
4967 return c_expr_sizeof_expr (expr);
4971 /* Parse an alignof expression. */
4973 static struct c_expr
4974 c_parser_alignof_expression (c_parser *parser)
4977 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF));
4978 c_parser_consume_token (parser);
4981 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4982 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4984 /* Either __alignof__ ( type-name ) or __alignof__
4985 unary-expression starting with a compound literal. */
4986 struct c_type_name *type_name;
4988 c_parser_consume_token (parser);
4989 type_name = c_parser_type_name (parser);
4990 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4991 if (type_name == NULL)
4996 ret.value = error_mark_node;
4997 ret.original_code = ERROR_MARK;
5000 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5002 expr = c_parser_postfix_expression_after_paren_type (parser,
5006 /* alignof ( type-name ). */
5009 ret.value = c_alignof (groktypename (type_name));
5010 ret.original_code = ERROR_MARK;
5016 expr = c_parser_unary_expression (parser);
5020 ret.value = c_alignof_expr (expr.value);
5021 ret.original_code = ERROR_MARK;
5026 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
5030 postfix-expression [ expression ]
5031 postfix-expression ( argument-expression-list[opt] )
5032 postfix-expression . identifier
5033 postfix-expression -> identifier
5034 postfix-expression ++
5035 postfix-expression --
5036 ( type-name ) { initializer-list }
5037 ( type-name ) { initializer-list , }
5039 argument-expression-list:
5041 argument-expression-list , argument-expression
5053 (treated as a keyword in GNU C)
5056 ( compound-statement )
5057 __builtin_va_arg ( assignment-expression , type-name )
5058 __builtin_offsetof ( type-name , offsetof-member-designator )
5059 __builtin_choose_expr ( assignment-expression ,
5060 assignment-expression ,
5061 assignment-expression )
5062 __builtin_types_compatible_p ( type-name , type-name )
5064 offsetof-member-designator:
5066 offsetof-member-designator . identifier
5067 offsetof-member-designator [ expression ]
5072 [ objc-receiver objc-message-args ]
5073 @selector ( objc-selector-arg )
5074 @protocol ( identifier )
5075 @encode ( type-name )
5079 static struct c_expr
5080 c_parser_postfix_expression (c_parser *parser)
5082 struct c_expr expr, e1, e2, e3;
5083 struct c_type_name *t1, *t2;
5085 switch (c_parser_peek_token (parser)->type)
5088 expr.value = c_parser_peek_token (parser)->value;
5089 expr.original_code = ERROR_MARK;
5090 loc = c_parser_peek_token (parser)->location;
5091 c_parser_consume_token (parser);
5092 if (TREE_CODE (expr.value) == FIXED_CST
5093 && !targetm.fixed_point_supported_p ())
5095 error_at (loc, "fixed-point types not supported for this target");
5096 expr.value = error_mark_node;
5103 expr.value = c_parser_peek_token (parser)->value;
5104 expr.original_code = ERROR_MARK;
5105 c_parser_consume_token (parser);
5111 expr.value = c_parser_peek_token (parser)->value;
5112 expr.original_code = STRING_CST;
5113 c_parser_consume_token (parser);
5115 case CPP_OBJC_STRING:
5116 gcc_assert (c_dialect_objc ());
5118 = objc_build_string_object (c_parser_peek_token (parser)->value);
5119 expr.original_code = ERROR_MARK;
5120 c_parser_consume_token (parser);
5123 if (c_parser_peek_token (parser)->id_kind != C_ID_ID)
5125 c_parser_error (parser, "expected expression");
5126 expr.value = error_mark_node;
5127 expr.original_code = ERROR_MARK;
5131 tree id = c_parser_peek_token (parser)->value;
5132 location_t loc = c_parser_peek_token (parser)->location;
5133 c_parser_consume_token (parser);
5134 expr.value = build_external_ref (id,
5135 (c_parser_peek_token (parser)->type
5136 == CPP_OPEN_PAREN), loc);
5137 expr.original_code = ERROR_MARK;
5140 case CPP_OPEN_PAREN:
5141 /* A parenthesized expression, statement expression or compound
5143 if (c_parser_peek_2nd_token (parser)->type == CPP_OPEN_BRACE)
5145 /* A statement expression. */
5147 location_t here = c_parser_peek_token (parser)->location;
5148 c_parser_consume_token (parser);
5149 c_parser_consume_token (parser);
5150 if (cur_stmt_list == NULL)
5152 error_at (here, "braced-group within expression allowed "
5153 "only inside a function");
5154 parser->error = true;
5155 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
5156 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5157 expr.value = error_mark_node;
5158 expr.original_code = ERROR_MARK;
5161 stmt = c_begin_stmt_expr ();
5162 c_parser_compound_statement_nostart (parser);
5163 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5165 pedwarn (here, OPT_pedantic,
5166 "ISO C forbids braced-groups within expressions");
5167 expr.value = c_finish_stmt_expr (stmt);
5168 expr.original_code = ERROR_MARK;
5170 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser)))
5172 /* A compound literal. ??? Can we actually get here rather
5173 than going directly to
5174 c_parser_postfix_expression_after_paren_type from
5176 struct c_type_name *type_name;
5177 c_parser_consume_token (parser);
5178 type_name = c_parser_type_name (parser);
5179 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5181 if (type_name == NULL)
5183 expr.value = error_mark_node;
5184 expr.original_code = ERROR_MARK;
5187 expr = c_parser_postfix_expression_after_paren_type (parser,
5192 /* A parenthesized expression. */
5193 c_parser_consume_token (parser);
5194 expr = c_parser_expression (parser);
5195 if (TREE_CODE (expr.value) == MODIFY_EXPR)
5196 TREE_NO_WARNING (expr.value) = 1;
5197 expr.original_code = ERROR_MARK;
5198 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5203 switch (c_parser_peek_token (parser)->keyword)
5205 case RID_FUNCTION_NAME:
5206 case RID_PRETTY_FUNCTION_NAME:
5207 case RID_C99_FUNCTION_NAME:
5208 expr.value = fname_decl (c_parser_peek_token (parser)->location,
5209 c_parser_peek_token (parser)->keyword,
5210 c_parser_peek_token (parser)->value);
5211 expr.original_code = ERROR_MARK;
5212 c_parser_consume_token (parser);
5215 c_parser_consume_token (parser);
5216 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5218 expr.value = error_mark_node;
5219 expr.original_code = ERROR_MARK;
5222 e1 = c_parser_expr_no_commas (parser, NULL);
5223 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5225 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5226 expr.value = error_mark_node;
5227 expr.original_code = ERROR_MARK;
5230 t1 = c_parser_type_name (parser);
5231 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5235 expr.value = error_mark_node;
5236 expr.original_code = ERROR_MARK;
5240 expr.value = build_va_arg (e1.value, groktypename (t1));
5241 expr.original_code = ERROR_MARK;
5245 c_parser_consume_token (parser);
5246 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5248 expr.value = error_mark_node;
5249 expr.original_code = ERROR_MARK;
5252 t1 = c_parser_type_name (parser);
5255 expr.value = error_mark_node;
5256 expr.original_code = ERROR_MARK;
5259 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5261 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5262 expr.value = error_mark_node;
5263 expr.original_code = ERROR_MARK;
5267 tree type = groktypename (t1);
5269 if (type == error_mark_node)
5270 offsetof_ref = error_mark_node;
5272 offsetof_ref = build1 (INDIRECT_REF, type, null_pointer_node);
5273 /* Parse the second argument to __builtin_offsetof. We
5274 must have one identifier, and beyond that we want to
5275 accept sub structure and sub array references. */
5276 if (c_parser_next_token_is (parser, CPP_NAME))
5278 offsetof_ref = build_component_ref
5279 (offsetof_ref, c_parser_peek_token (parser)->value);
5280 c_parser_consume_token (parser);
5281 while (c_parser_next_token_is (parser, CPP_DOT)
5282 || c_parser_next_token_is (parser,
5284 || c_parser_next_token_is (parser,
5287 if (c_parser_next_token_is (parser, CPP_DEREF))
5289 loc = c_parser_peek_token (parser)->location;
5290 offsetof_ref = build_array_ref (offsetof_ref,
5295 else if (c_parser_next_token_is (parser, CPP_DOT))
5298 c_parser_consume_token (parser);
5299 if (c_parser_next_token_is_not (parser,
5302 c_parser_error (parser, "expected identifier");
5305 offsetof_ref = build_component_ref
5307 c_parser_peek_token (parser)->value);
5308 c_parser_consume_token (parser);
5313 loc = c_parser_peek_token (parser)->location;
5314 c_parser_consume_token (parser);
5315 idx = c_parser_expression (parser).value;
5316 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5318 offsetof_ref = build_array_ref (offsetof_ref, idx, loc);
5323 c_parser_error (parser, "expected identifier");
5324 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5326 expr.value = fold_offsetof (offsetof_ref, NULL_TREE);
5327 expr.original_code = ERROR_MARK;
5330 case RID_CHOOSE_EXPR:
5331 c_parser_consume_token (parser);
5332 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5334 expr.value = error_mark_node;
5335 expr.original_code = ERROR_MARK;
5338 loc = c_parser_peek_token (parser)->location;
5339 e1 = c_parser_expr_no_commas (parser, NULL);
5340 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5342 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5343 expr.value = error_mark_node;
5344 expr.original_code = ERROR_MARK;
5347 e2 = c_parser_expr_no_commas (parser, NULL);
5348 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5350 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5351 expr.value = error_mark_node;
5352 expr.original_code = ERROR_MARK;
5355 e3 = c_parser_expr_no_commas (parser, NULL);
5356 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5361 c = fold (e1.value);
5362 if (TREE_CODE (c) != INTEGER_CST)
5364 "first argument to %<__builtin_choose_expr%> not"
5366 expr = integer_zerop (c) ? e3 : e2;
5369 case RID_TYPES_COMPATIBLE_P:
5370 c_parser_consume_token (parser);
5371 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5373 expr.value = error_mark_node;
5374 expr.original_code = ERROR_MARK;
5377 t1 = c_parser_type_name (parser);
5380 expr.value = error_mark_node;
5381 expr.original_code = ERROR_MARK;
5384 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5386 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5387 expr.value = error_mark_node;
5388 expr.original_code = ERROR_MARK;
5391 t2 = c_parser_type_name (parser);
5394 expr.value = error_mark_node;
5395 expr.original_code = ERROR_MARK;
5398 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5403 e1 = TYPE_MAIN_VARIANT (groktypename (t1));
5404 e2 = TYPE_MAIN_VARIANT (groktypename (t2));
5406 expr.value = comptypes (e1, e2)
5407 ? build_int_cst (NULL_TREE, 1)
5408 : build_int_cst (NULL_TREE, 0);
5409 expr.original_code = ERROR_MARK;
5412 case RID_AT_SELECTOR:
5413 gcc_assert (c_dialect_objc ());
5414 c_parser_consume_token (parser);
5415 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5417 expr.value = error_mark_node;
5418 expr.original_code = ERROR_MARK;
5422 tree sel = c_parser_objc_selector_arg (parser);
5423 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5425 expr.value = objc_build_selector_expr (sel);
5426 expr.original_code = ERROR_MARK;
5429 case RID_AT_PROTOCOL:
5430 gcc_assert (c_dialect_objc ());
5431 c_parser_consume_token (parser);
5432 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5434 expr.value = error_mark_node;
5435 expr.original_code = ERROR_MARK;
5438 if (c_parser_next_token_is_not (parser, CPP_NAME))
5440 c_parser_error (parser, "expected identifier");
5441 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5442 expr.value = error_mark_node;
5443 expr.original_code = ERROR_MARK;
5447 tree id = c_parser_peek_token (parser)->value;
5448 c_parser_consume_token (parser);
5449 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5451 expr.value = objc_build_protocol_expr (id);
5452 expr.original_code = ERROR_MARK;
5456 /* Extension to support C-structures in the archiver. */
5457 gcc_assert (c_dialect_objc ());
5458 c_parser_consume_token (parser);
5459 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5461 expr.value = error_mark_node;
5462 expr.original_code = ERROR_MARK;
5465 t1 = c_parser_type_name (parser);
5468 expr.value = error_mark_node;
5469 expr.original_code = ERROR_MARK;
5470 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5473 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5476 tree type = groktypename (t1);
5477 expr.value = objc_build_encode_expr (type);
5478 expr.original_code = ERROR_MARK;
5482 c_parser_error (parser, "expected expression");
5483 expr.value = error_mark_node;
5484 expr.original_code = ERROR_MARK;
5488 case CPP_OPEN_SQUARE:
5489 if (c_dialect_objc ())
5491 tree receiver, args;
5492 c_parser_consume_token (parser);
5493 receiver = c_parser_objc_receiver (parser);
5494 args = c_parser_objc_message_args (parser);
5495 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5497 expr.value = objc_build_message_expr (build_tree_list (receiver,
5499 expr.original_code = ERROR_MARK;
5502 /* Else fall through to report error. */
5504 c_parser_error (parser, "expected expression");
5505 expr.value = error_mark_node;
5506 expr.original_code = ERROR_MARK;
5509 return c_parser_postfix_expression_after_primary (parser, expr);
5512 /* Parse a postfix expression after a parenthesized type name: the
5513 brace-enclosed initializer of a compound literal, possibly followed
5514 by some postfix operators. This is separate because it is not
5515 possible to tell until after the type name whether a cast
5516 expression has a cast or a compound literal, or whether the operand
5517 of sizeof is a parenthesized type name or starts with a compound
5520 static struct c_expr
5521 c_parser_postfix_expression_after_paren_type (c_parser *parser,
5522 struct c_type_name *type_name)
5527 location_t start_loc;
5528 start_init (NULL_TREE, NULL, 0);
5529 type = groktypename (type_name);
5530 start_loc = c_parser_peek_token (parser)->location;
5531 if (type != error_mark_node && C_TYPE_VARIABLE_SIZE (type))
5533 error_at (start_loc, "compound literal has variable size");
5534 type = error_mark_node;
5536 init = c_parser_braced_init (parser, type, false);
5538 maybe_warn_string_init (type, init);
5541 pedwarn (start_loc, OPT_pedantic, "ISO C90 forbids compound literals");
5542 expr.value = build_compound_literal (type, init.value);
5543 expr.original_code = ERROR_MARK;
5544 return c_parser_postfix_expression_after_primary (parser, expr);
5547 /* Parse a postfix expression after the initial primary or compound
5548 literal; that is, parse a series of postfix operators. */
5550 static struct c_expr
5551 c_parser_postfix_expression_after_primary (c_parser *parser,
5554 tree ident, idx, exprlist;
5555 location_t loc = c_parser_peek_token (parser)->location;
5558 switch (c_parser_peek_token (parser)->type)
5560 case CPP_OPEN_SQUARE:
5561 /* Array reference. */
5562 loc = c_parser_peek_token (parser)->location;
5563 c_parser_consume_token (parser);
5564 idx = c_parser_expression (parser).value;
5565 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5567 expr.value = build_array_ref (expr.value, idx, loc);
5568 expr.original_code = ERROR_MARK;
5570 case CPP_OPEN_PAREN:
5571 /* Function call. */
5572 c_parser_consume_token (parser);
5573 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
5574 exprlist = NULL_TREE;
5576 exprlist = c_parser_expr_list (parser, true);
5577 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5579 expr.value = build_function_call (expr.value, exprlist);
5580 expr.original_code = ERROR_MARK;
5581 if (warn_disallowed_functions)
5582 warn_if_disallowed_function_p (expr.value);
5585 /* Structure element reference. */
5586 c_parser_consume_token (parser);
5587 expr = default_function_array_conversion (expr);
5588 if (c_parser_next_token_is (parser, CPP_NAME))
5589 ident = c_parser_peek_token (parser)->value;
5592 c_parser_error (parser, "expected identifier");
5593 expr.value = error_mark_node;
5594 expr.original_code = ERROR_MARK;
5597 c_parser_consume_token (parser);
5598 expr.value = build_component_ref (expr.value, ident);
5599 expr.original_code = ERROR_MARK;
5602 /* Structure element reference. */
5603 c_parser_consume_token (parser);
5604 expr = default_function_array_conversion (expr);
5605 if (c_parser_next_token_is (parser, CPP_NAME))
5606 ident = c_parser_peek_token (parser)->value;
5609 c_parser_error (parser, "expected identifier");
5610 expr.value = error_mark_node;
5611 expr.original_code = ERROR_MARK;
5614 c_parser_consume_token (parser);
5615 expr.value = build_component_ref (build_indirect_ref (loc,
5619 expr.original_code = ERROR_MARK;
5622 /* Postincrement. */
5623 c_parser_consume_token (parser);
5624 expr = default_function_array_conversion (expr);
5625 expr.value = build_unary_op (loc,
5626 POSTINCREMENT_EXPR, expr.value, 0);
5627 expr.original_code = ERROR_MARK;
5629 case CPP_MINUS_MINUS:
5630 /* Postdecrement. */
5631 c_parser_consume_token (parser);
5632 expr = default_function_array_conversion (expr);
5633 expr.value = build_unary_op (loc,
5634 POSTDECREMENT_EXPR, expr.value, 0);
5635 expr.original_code = ERROR_MARK;
5643 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5646 assignment-expression
5647 expression , assignment-expression
5650 static struct c_expr
5651 c_parser_expression (c_parser *parser)
5654 expr = c_parser_expr_no_commas (parser, NULL);
5655 while (c_parser_next_token_is (parser, CPP_COMMA))
5658 c_parser_consume_token (parser);
5659 next = c_parser_expr_no_commas (parser, NULL);
5660 next = default_function_array_conversion (next);
5661 expr.value = build_compound_expr (expr.value, next.value);
5662 expr.original_code = COMPOUND_EXPR;
5667 /* Parse an expression and convert functions or arrays to
5670 static struct c_expr
5671 c_parser_expression_conv (c_parser *parser)
5674 expr = c_parser_expression (parser);
5675 expr = default_function_array_conversion (expr);
5679 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5680 functions and arrays to pointers.
5683 assignment-expression
5684 nonempty-expr-list , assignment-expression
5688 c_parser_expr_list (c_parser *parser, bool convert_p)
5692 expr = c_parser_expr_no_commas (parser, NULL);
5694 expr = default_function_array_conversion (expr);
5695 ret = cur = build_tree_list (NULL_TREE, expr.value);
5696 while (c_parser_next_token_is (parser, CPP_COMMA))
5698 c_parser_consume_token (parser);
5699 expr = c_parser_expr_no_commas (parser, NULL);
5701 expr = default_function_array_conversion (expr);
5702 cur = TREE_CHAIN (cur) = build_tree_list (NULL_TREE, expr.value);
5708 /* Parse Objective-C-specific constructs. */
5710 /* Parse an objc-class-definition.
5712 objc-class-definition:
5713 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5714 objc-class-instance-variables[opt] objc-methodprotolist @end
5715 @implementation identifier objc-superclass[opt]
5716 objc-class-instance-variables[opt]
5717 @interface identifier ( identifier ) objc-protocol-refs[opt]
5718 objc-methodprotolist @end
5719 @implementation identifier ( identifier )
5724 "@interface identifier (" must start "@interface identifier (
5725 identifier ) ...": objc-methodprotolist in the first production may
5726 not start with a parenthesized identifier as a declarator of a data
5727 definition with no declaration specifiers if the objc-superclass,
5728 objc-protocol-refs and objc-class-instance-variables are omitted. */
5731 c_parser_objc_class_definition (c_parser *parser)
5736 if (c_parser_next_token_is_keyword (parser, RID_AT_INTERFACE))
5738 else if (c_parser_next_token_is_keyword (parser, RID_AT_IMPLEMENTATION))
5742 c_parser_consume_token (parser);
5743 if (c_parser_next_token_is_not (parser, CPP_NAME))
5745 c_parser_error (parser, "expected identifier");
5748 id1 = c_parser_peek_token (parser)->value;
5749 c_parser_consume_token (parser);
5750 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
5753 tree proto = NULL_TREE;
5754 c_parser_consume_token (parser);
5755 if (c_parser_next_token_is_not (parser, CPP_NAME))
5757 c_parser_error (parser, "expected identifier");
5758 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5761 id2 = c_parser_peek_token (parser)->value;
5762 c_parser_consume_token (parser);
5763 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
5766 objc_start_category_implementation (id1, id2);
5769 if (c_parser_next_token_is (parser, CPP_LESS))
5770 proto = c_parser_objc_protocol_refs (parser);
5771 objc_start_category_interface (id1, id2, proto);
5772 c_parser_objc_methodprotolist (parser);
5773 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5774 objc_finish_interface ();
5777 if (c_parser_next_token_is (parser, CPP_COLON))
5779 c_parser_consume_token (parser);
5780 if (c_parser_next_token_is_not (parser, CPP_NAME))
5782 c_parser_error (parser, "expected identifier");
5785 superclass = c_parser_peek_token (parser)->value;
5786 c_parser_consume_token (parser);
5789 superclass = NULL_TREE;
5792 tree proto = NULL_TREE;
5793 if (c_parser_next_token_is (parser, CPP_LESS))
5794 proto = c_parser_objc_protocol_refs (parser);
5795 objc_start_class_interface (id1, superclass, proto);
5798 objc_start_class_implementation (id1, superclass);
5799 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5800 c_parser_objc_class_instance_variables (parser);
5803 objc_continue_interface ();
5804 c_parser_objc_methodprotolist (parser);
5805 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5806 objc_finish_interface ();
5810 objc_continue_implementation ();
5815 /* Parse objc-class-instance-variables.
5817 objc-class-instance-variables:
5818 { objc-instance-variable-decl-list[opt] }
5820 objc-instance-variable-decl-list:
5821 objc-visibility-spec
5822 objc-instance-variable-decl ;
5824 objc-instance-variable-decl-list objc-visibility-spec
5825 objc-instance-variable-decl-list objc-instance-variable-decl ;
5826 objc-instance-variable-decl-list ;
5828 objc-visibility-spec:
5833 objc-instance-variable-decl:
5838 c_parser_objc_class_instance_variables (c_parser *parser)
5840 gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE));
5841 c_parser_consume_token (parser);
5842 while (c_parser_next_token_is_not (parser, CPP_EOF))
5845 /* Parse any stray semicolon. */
5846 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
5848 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
5849 "extra semicolon in struct or union specified");
5850 c_parser_consume_token (parser);
5853 /* Stop if at the end of the instance variables. */
5854 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
5856 c_parser_consume_token (parser);
5859 /* Parse any objc-visibility-spec. */
5860 if (c_parser_next_token_is_keyword (parser, RID_PRIVATE))
5862 c_parser_consume_token (parser);
5863 objc_set_visibility (2);
5866 else if (c_parser_next_token_is_keyword (parser, RID_PROTECTED))
5868 c_parser_consume_token (parser);
5869 objc_set_visibility (0);
5872 else if (c_parser_next_token_is_keyword (parser, RID_PUBLIC))
5874 c_parser_consume_token (parser);
5875 objc_set_visibility (1);
5878 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
5880 c_parser_pragma (parser, pragma_external);
5884 /* Parse some comma-separated declarations. */
5885 decls = c_parser_struct_declaration (parser);
5887 /* Comma-separated instance variables are chained together in
5888 reverse order; add them one by one. */
5889 tree ivar = nreverse (decls);
5890 for (; ivar; ivar = TREE_CHAIN (ivar))
5891 objc_add_instance_variable (copy_node (ivar));
5893 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5897 /* Parse an objc-class-declaration.
5899 objc-class-declaration:
5900 @class identifier-list ;
5904 c_parser_objc_class_declaration (c_parser *parser)
5906 tree list = NULL_TREE;
5907 gcc_assert (c_parser_next_token_is_keyword (parser, RID_CLASS));
5908 c_parser_consume_token (parser);
5909 /* Any identifiers, including those declared as type names, are OK
5914 if (c_parser_next_token_is_not (parser, CPP_NAME))
5916 c_parser_error (parser, "expected identifier");
5919 id = c_parser_peek_token (parser)->value;
5920 list = chainon (list, build_tree_list (NULL_TREE, id));
5921 c_parser_consume_token (parser);
5922 if (c_parser_next_token_is (parser, CPP_COMMA))
5923 c_parser_consume_token (parser);
5927 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5928 objc_declare_class (list);
5931 /* Parse an objc-alias-declaration.
5933 objc-alias-declaration:
5934 @compatibility_alias identifier identifier ;
5938 c_parser_objc_alias_declaration (c_parser *parser)
5941 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_ALIAS));
5942 c_parser_consume_token (parser);
5943 if (c_parser_next_token_is_not (parser, CPP_NAME))
5945 c_parser_error (parser, "expected identifier");
5946 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
5949 id1 = c_parser_peek_token (parser)->value;
5950 c_parser_consume_token (parser);
5951 if (c_parser_next_token_is_not (parser, CPP_NAME))
5953 c_parser_error (parser, "expected identifier");
5954 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
5957 id2 = c_parser_peek_token (parser)->value;
5958 c_parser_consume_token (parser);
5959 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5960 objc_declare_alias (id1, id2);
5963 /* Parse an objc-protocol-definition.
5965 objc-protocol-definition:
5966 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
5967 @protocol identifier-list ;
5969 "@protocol identifier ;" should be resolved as "@protocol
5970 identifier-list ;": objc-methodprotolist may not start with a
5971 semicolon in the first alternative if objc-protocol-refs are
5975 c_parser_objc_protocol_definition (c_parser *parser)
5977 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROTOCOL));
5978 c_parser_consume_token (parser);
5979 if (c_parser_next_token_is_not (parser, CPP_NAME))
5981 c_parser_error (parser, "expected identifier");
5984 if (c_parser_peek_2nd_token (parser)->type == CPP_COMMA
5985 || c_parser_peek_2nd_token (parser)->type == CPP_SEMICOLON)
5987 tree list = NULL_TREE;
5988 /* Any identifiers, including those declared as type names, are
5993 if (c_parser_next_token_is_not (parser, CPP_NAME))
5995 c_parser_error (parser, "expected identifier");
5998 id = c_parser_peek_token (parser)->value;
5999 list = chainon (list, build_tree_list (NULL_TREE, id));
6000 c_parser_consume_token (parser);
6001 if (c_parser_next_token_is (parser, CPP_COMMA))
6002 c_parser_consume_token (parser);
6006 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
6007 objc_declare_protocols (list);
6011 tree id = c_parser_peek_token (parser)->value;
6012 tree proto = NULL_TREE;
6013 c_parser_consume_token (parser);
6014 if (c_parser_next_token_is (parser, CPP_LESS))
6015 proto = c_parser_objc_protocol_refs (parser);
6016 parser->objc_pq_context = true;
6017 objc_start_protocol (id, proto);
6018 c_parser_objc_methodprotolist (parser);
6019 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
6020 parser->objc_pq_context = false;
6021 objc_finish_interface ();
6025 /* Parse an objc-method-type.
6032 static enum tree_code
6033 c_parser_objc_method_type (c_parser *parser)
6035 switch (c_parser_peek_token (parser)->type)
6038 c_parser_consume_token (parser);
6041 c_parser_consume_token (parser);
6048 /* Parse an objc-method-definition.
6050 objc-method-definition:
6051 objc-method-type objc-method-decl ;[opt] compound-statement
6055 c_parser_objc_method_definition (c_parser *parser)
6057 enum tree_code type = c_parser_objc_method_type (parser);
6059 objc_set_method_type (type);
6060 parser->objc_pq_context = true;
6061 decl = c_parser_objc_method_decl (parser);
6062 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
6064 c_parser_consume_token (parser);
6065 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
6066 "extra semicolon in method definition specified");
6068 if (!c_parser_next_token_is (parser, CPP_OPEN_BRACE))
6070 c_parser_error (parser, "expected %<{%>");
6073 parser->objc_pq_context = false;
6074 objc_start_method_definition (decl);
6075 add_stmt (c_parser_compound_statement (parser));
6076 objc_finish_method_definition (current_function_decl);
6079 /* Parse an objc-methodprotolist.
6081 objc-methodprotolist:
6083 objc-methodprotolist objc-methodproto
6084 objc-methodprotolist declaration
6085 objc-methodprotolist ;
6087 The declaration is a data definition, which may be missing
6088 declaration specifiers under the same rules and diagnostics as
6089 other data definitions outside functions, and the stray semicolon
6090 is diagnosed the same way as a stray semicolon outside a
6094 c_parser_objc_methodprotolist (c_parser *parser)
6098 /* The list is terminated by @end. */
6099 switch (c_parser_peek_token (parser)->type)
6102 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
6103 "ISO C does not allow extra %<;%> outside of a function");
6104 c_parser_consume_token (parser);
6108 c_parser_objc_methodproto (parser);
6111 c_parser_pragma (parser, pragma_external);
6116 if (c_parser_next_token_is_keyword (parser, RID_AT_END))
6118 c_parser_declaration_or_fndef (parser, false, true, false, true);
6124 /* Parse an objc-methodproto.
6127 objc-method-type objc-method-decl ;
6131 c_parser_objc_methodproto (c_parser *parser)
6133 enum tree_code type = c_parser_objc_method_type (parser);
6135 objc_set_method_type (type);
6136 /* Remember protocol qualifiers in prototypes. */
6137 parser->objc_pq_context = true;
6138 decl = c_parser_objc_method_decl (parser);
6139 /* Forget protocol qualifiers here. */
6140 parser->objc_pq_context = false;
6141 objc_add_method_declaration (decl);
6142 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
6145 /* Parse an objc-method-decl.
6148 ( objc-type-name ) objc-selector
6150 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6151 objc-keyword-selector objc-optparmlist
6153 objc-keyword-selector:
6155 objc-keyword-selector objc-keyword-decl
6158 objc-selector : ( objc-type-name ) identifier
6159 objc-selector : identifier
6160 : ( objc-type-name ) identifier
6164 objc-optparms objc-optellipsis
6168 objc-opt-parms , parameter-declaration
6176 c_parser_objc_method_decl (c_parser *parser)
6178 tree type = NULL_TREE;
6180 tree parms = NULL_TREE;
6181 bool ellipsis = false;
6183 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6185 c_parser_consume_token (parser);
6186 type = c_parser_objc_type_name (parser);
6187 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6189 sel = c_parser_objc_selector (parser);
6190 /* If there is no selector, or a colon follows, we have an
6191 objc-keyword-selector. If there is a selector, and a colon does
6192 not follow, that selector ends the objc-method-decl. */
6193 if (!sel || c_parser_next_token_is (parser, CPP_COLON))
6196 tree list = NULL_TREE;
6199 tree atype = NULL_TREE, id, keyworddecl;
6200 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6202 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6204 c_parser_consume_token (parser);
6205 atype = c_parser_objc_type_name (parser);
6206 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6209 if (c_parser_next_token_is_not (parser, CPP_NAME))
6211 c_parser_error (parser, "expected identifier");
6212 return error_mark_node;
6214 id = c_parser_peek_token (parser)->value;
6215 c_parser_consume_token (parser);
6216 keyworddecl = objc_build_keyword_decl (tsel, atype, id);
6217 list = chainon (list, keyworddecl);
6218 tsel = c_parser_objc_selector (parser);
6219 if (!tsel && c_parser_next_token_is_not (parser, CPP_COLON))
6222 /* Parse the optional parameter list. Optional Objective-C
6223 method parameters follow the C syntax, and may include '...'
6224 to denote a variable number of arguments. */
6225 parms = make_node (TREE_LIST);
6226 while (c_parser_next_token_is (parser, CPP_COMMA))
6228 struct c_parm *parm;
6229 c_parser_consume_token (parser);
6230 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
6233 c_parser_consume_token (parser);
6236 parm = c_parser_parameter_declaration (parser, NULL_TREE);
6239 parms = chainon (parms,
6240 build_tree_list (NULL_TREE, grokparm (parm)));
6244 return objc_build_method_signature (type, sel, parms, ellipsis);
6247 /* Parse an objc-type-name.
6250 objc-type-qualifiers[opt] type-name
6251 objc-type-qualifiers[opt]
6253 objc-type-qualifiers:
6255 objc-type-qualifiers objc-type-qualifier
6257 objc-type-qualifier: one of
6258 in out inout bycopy byref oneway
6262 c_parser_objc_type_name (c_parser *parser)
6264 tree quals = NULL_TREE;
6265 struct c_type_name *type_name = NULL;
6266 tree type = NULL_TREE;
6269 c_token *token = c_parser_peek_token (parser);
6270 if (token->type == CPP_KEYWORD
6271 && (token->keyword == RID_IN
6272 || token->keyword == RID_OUT
6273 || token->keyword == RID_INOUT
6274 || token->keyword == RID_BYCOPY
6275 || token->keyword == RID_BYREF
6276 || token->keyword == RID_ONEWAY))
6278 quals = chainon (quals, build_tree_list (NULL_TREE, token->value));
6279 c_parser_consume_token (parser);
6284 if (c_parser_next_token_starts_typename (parser))
6285 type_name = c_parser_type_name (parser);
6287 type = groktypename (type_name);
6288 return build_tree_list (quals, type);
6291 /* Parse objc-protocol-refs.
6298 c_parser_objc_protocol_refs (c_parser *parser)
6300 tree list = NULL_TREE;
6301 gcc_assert (c_parser_next_token_is (parser, CPP_LESS));
6302 c_parser_consume_token (parser);
6303 /* Any identifiers, including those declared as type names, are OK
6308 if (c_parser_next_token_is_not (parser, CPP_NAME))
6310 c_parser_error (parser, "expected identifier");
6313 id = c_parser_peek_token (parser)->value;
6314 list = chainon (list, build_tree_list (NULL_TREE, id));
6315 c_parser_consume_token (parser);
6316 if (c_parser_next_token_is (parser, CPP_COMMA))
6317 c_parser_consume_token (parser);
6321 c_parser_require (parser, CPP_GREATER, "expected %<>%>");
6325 /* Parse an objc-try-catch-statement.
6327 objc-try-catch-statement:
6328 @try compound-statement objc-catch-list[opt]
6329 @try compound-statement objc-catch-list[opt] @finally compound-statement
6332 @catch ( parameter-declaration ) compound-statement
6333 objc-catch-list @catch ( parameter-declaration ) compound-statement
6337 c_parser_objc_try_catch_statement (c_parser *parser)
6341 gcc_assert (c_parser_next_token_is_keyword (parser, RID_TRY));
6342 c_parser_consume_token (parser);
6343 loc = c_parser_peek_token (parser)->location;
6344 stmt = c_parser_compound_statement (parser);
6345 objc_begin_try_stmt (loc, stmt);
6346 while (c_parser_next_token_is_keyword (parser, RID_CATCH))
6348 struct c_parm *parm;
6349 c_parser_consume_token (parser);
6350 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6352 parm = c_parser_parameter_declaration (parser, NULL_TREE);
6355 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6358 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6359 objc_begin_catch_clause (grokparm (parm));
6360 if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
6361 c_parser_compound_statement_nostart (parser);
6362 objc_finish_catch_clause ();
6364 if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY))
6368 c_parser_consume_token (parser);
6369 finloc = c_parser_peek_token (parser)->location;
6370 finstmt = c_parser_compound_statement (parser);
6371 objc_build_finally_clause (finloc, finstmt);
6373 objc_finish_try_stmt ();
6376 /* Parse an objc-synchronized-statement.
6378 objc-synchronized-statement:
6379 @synchronized ( expression ) compound-statement
6383 c_parser_objc_synchronized_statement (c_parser *parser)
6387 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED));
6388 c_parser_consume_token (parser);
6389 loc = c_parser_peek_token (parser)->location;
6390 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6392 expr = c_parser_expression (parser).value;
6393 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6396 expr = error_mark_node;
6397 stmt = c_parser_compound_statement (parser);
6398 objc_build_synchronized (loc, expr, stmt);
6401 /* Parse an objc-selector; return NULL_TREE without an error if the
6402 next token is not an objc-selector.
6407 enum struct union if else while do for switch case default
6408 break continue return goto asm sizeof typeof __alignof
6409 unsigned long const short volatile signed restrict _Complex
6410 in out inout bycopy byref oneway int char float double void _Bool
6412 ??? Why this selection of keywords but not, for example, storage
6413 class specifiers? */
6416 c_parser_objc_selector (c_parser *parser)
6418 c_token *token = c_parser_peek_token (parser);
6419 tree value = token->value;
6420 if (token->type == CPP_NAME)
6422 c_parser_consume_token (parser);
6425 if (token->type != CPP_KEYWORD)
6427 switch (token->keyword)
6468 c_parser_consume_token (parser);
6475 /* Parse an objc-selector-arg.
6479 objc-keywordname-list
6481 objc-keywordname-list:
6483 objc-keywordname-list objc-keywordname
6491 c_parser_objc_selector_arg (c_parser *parser)
6493 tree sel = c_parser_objc_selector (parser);
6494 tree list = NULL_TREE;
6495 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
6499 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6501 list = chainon (list, build_tree_list (sel, NULL_TREE));
6502 sel = c_parser_objc_selector (parser);
6503 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
6509 /* Parse an objc-receiver.
6518 c_parser_objc_receiver (c_parser *parser)
6520 if (c_parser_peek_token (parser)->type == CPP_NAME
6521 && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME
6522 || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME))
6524 tree id = c_parser_peek_token (parser)->value;
6525 c_parser_consume_token (parser);
6526 return objc_get_class_reference (id);
6528 return c_parser_expression (parser).value;
6531 /* Parse objc-message-args.
6535 objc-keywordarg-list
6537 objc-keywordarg-list:
6539 objc-keywordarg-list objc-keywordarg
6542 objc-selector : objc-keywordexpr
6547 c_parser_objc_message_args (c_parser *parser)
6549 tree sel = c_parser_objc_selector (parser);
6550 tree list = NULL_TREE;
6551 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
6556 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6558 keywordexpr = c_parser_objc_keywordexpr (parser);
6559 list = chainon (list, build_tree_list (sel, keywordexpr));
6560 sel = c_parser_objc_selector (parser);
6561 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
6567 /* Parse an objc-keywordexpr.
6574 c_parser_objc_keywordexpr (c_parser *parser)
6576 tree list = c_parser_expr_list (parser, true);
6577 if (TREE_CHAIN (list) == NULL_TREE)
6579 /* Just return the expression, remove a level of
6581 return TREE_VALUE (list);
6585 /* We have a comma expression, we will collapse later. */
6591 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6592 should be considered, statements. ALLOW_STMT is true if we're within
6593 the context of a function and such pragmas are to be allowed. Returns
6594 true if we actually parsed such a pragma. */
6597 c_parser_pragma (c_parser *parser, enum pragma_context context)
6601 id = c_parser_peek_token (parser)->pragma_kind;
6602 gcc_assert (id != PRAGMA_NONE);
6606 case PRAGMA_OMP_BARRIER:
6607 if (context != pragma_compound)
6609 if (context == pragma_stmt)
6610 c_parser_error (parser, "%<#pragma omp barrier%> may only be "
6611 "used in compound statements");
6614 c_parser_omp_barrier (parser);
6617 case PRAGMA_OMP_FLUSH:
6618 if (context != pragma_compound)
6620 if (context == pragma_stmt)
6621 c_parser_error (parser, "%<#pragma omp flush%> may only be "
6622 "used in compound statements");
6625 c_parser_omp_flush (parser);
6628 case PRAGMA_OMP_TASKWAIT:
6629 if (context != pragma_compound)
6631 if (context == pragma_stmt)
6632 c_parser_error (parser, "%<#pragma omp taskwait%> may only be "
6633 "used in compound statements");
6636 c_parser_omp_taskwait (parser);
6639 case PRAGMA_OMP_THREADPRIVATE:
6640 c_parser_omp_threadprivate (parser);
6643 case PRAGMA_OMP_SECTION:
6644 error_at (c_parser_peek_token (parser)->location,
6645 "%<#pragma omp section%> may only be used in "
6646 "%<#pragma omp sections%> construct");
6647 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6650 case PRAGMA_GCC_PCH_PREPROCESS:
6651 c_parser_error (parser, "%<#pragma GCC pch_preprocess%> must be first");
6652 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6656 if (id < PRAGMA_FIRST_EXTERNAL)
6658 if (context == pragma_external)
6661 c_parser_error (parser, "expected declaration specifiers");
6662 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6665 c_parser_omp_construct (parser);
6671 c_parser_consume_pragma (parser);
6672 c_invoke_pragma_handler (id);
6674 /* Skip to EOL, but suppress any error message. Those will have been
6675 generated by the handler routine through calling error, as opposed
6676 to calling c_parser_error. */
6677 parser->error = true;
6678 c_parser_skip_to_pragma_eol (parser);
6683 /* The interface the pragma parsers have to the lexer. */
6686 pragma_lex (tree *value)
6688 c_token *tok = c_parser_peek_token (the_parser);
6689 enum cpp_ttype ret = tok->type;
6691 *value = tok->value;
6692 if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF)
6696 if (ret == CPP_KEYWORD)
6698 c_parser_consume_token (the_parser);
6705 c_parser_pragma_pch_preprocess (c_parser *parser)
6709 c_parser_consume_pragma (parser);
6710 if (c_parser_next_token_is (parser, CPP_STRING))
6712 name = c_parser_peek_token (parser)->value;
6713 c_parser_consume_token (parser);
6716 c_parser_error (parser, "expected string literal");
6717 c_parser_skip_to_pragma_eol (parser);
6720 c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name));
6723 /* OpenMP 2.5 parsing routines. */
6725 /* Returns name of the next clause.
6726 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6727 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6728 returned and the token is consumed. */
6730 static pragma_omp_clause
6731 c_parser_omp_clause_name (c_parser *parser)
6733 pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE;
6735 if (c_parser_next_token_is_keyword (parser, RID_IF))
6736 result = PRAGMA_OMP_CLAUSE_IF;
6737 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
6738 result = PRAGMA_OMP_CLAUSE_DEFAULT;
6739 else if (c_parser_next_token_is (parser, CPP_NAME))
6741 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
6746 if (!strcmp ("collapse", p))
6747 result = PRAGMA_OMP_CLAUSE_COLLAPSE;
6748 else if (!strcmp ("copyin", p))
6749 result = PRAGMA_OMP_CLAUSE_COPYIN;
6750 else if (!strcmp ("copyprivate", p))
6751 result = PRAGMA_OMP_CLAUSE_COPYPRIVATE;
6754 if (!strcmp ("firstprivate", p))
6755 result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE;
6758 if (!strcmp ("lastprivate", p))
6759 result = PRAGMA_OMP_CLAUSE_LASTPRIVATE;
6762 if (!strcmp ("nowait", p))
6763 result = PRAGMA_OMP_CLAUSE_NOWAIT;
6764 else if (!strcmp ("num_threads", p))
6765 result = PRAGMA_OMP_CLAUSE_NUM_THREADS;
6768 if (!strcmp ("ordered", p))
6769 result = PRAGMA_OMP_CLAUSE_ORDERED;
6772 if (!strcmp ("private", p))
6773 result = PRAGMA_OMP_CLAUSE_PRIVATE;
6776 if (!strcmp ("reduction", p))
6777 result = PRAGMA_OMP_CLAUSE_REDUCTION;
6780 if (!strcmp ("schedule", p))
6781 result = PRAGMA_OMP_CLAUSE_SCHEDULE;
6782 else if (!strcmp ("shared", p))
6783 result = PRAGMA_OMP_CLAUSE_SHARED;
6786 if (!strcmp ("untied", p))
6787 result = PRAGMA_OMP_CLAUSE_UNTIED;
6792 if (result != PRAGMA_OMP_CLAUSE_NONE)
6793 c_parser_consume_token (parser);
6798 /* Validate that a clause of the given type does not already exist. */
6801 check_no_duplicate_clause (tree clauses, enum omp_clause_code code,
6806 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
6807 if (OMP_CLAUSE_CODE (c) == code)
6809 error ("too many %qs clauses", name);
6817 variable-list , identifier
6819 If KIND is nonzero, create the appropriate node and install the decl
6820 in OMP_CLAUSE_DECL and add the node to the head of the list.
6822 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6823 return the list created. */
6826 c_parser_omp_variable_list (c_parser *parser, enum omp_clause_code kind,
6829 if (c_parser_next_token_is_not (parser, CPP_NAME)
6830 || c_parser_peek_token (parser)->id_kind != C_ID_ID)
6831 c_parser_error (parser, "expected identifier");
6833 while (c_parser_next_token_is (parser, CPP_NAME)
6834 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
6836 tree t = lookup_name (c_parser_peek_token (parser)->value);
6839 undeclared_variable (c_parser_peek_token (parser)->value,
6840 c_parser_peek_token (parser)->location);
6841 else if (t == error_mark_node)
6845 tree u = build_omp_clause (kind);
6846 OMP_CLAUSE_DECL (u) = t;
6847 OMP_CLAUSE_CHAIN (u) = list;
6851 list = tree_cons (t, NULL_TREE, list);
6853 c_parser_consume_token (parser);
6855 if (c_parser_next_token_is_not (parser, CPP_COMMA))
6858 c_parser_consume_token (parser);
6864 /* Similarly, but expect leading and trailing parenthesis. This is a very
6865 common case for omp clauses. */
6868 c_parser_omp_var_list_parens (c_parser *parser, enum omp_clause_code kind,
6871 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6873 list = c_parser_omp_variable_list (parser, kind, list);
6874 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6880 collapse ( constant-expression ) */
6883 c_parser_omp_clause_collapse (c_parser *parser, tree list)
6885 tree c, num = error_mark_node;
6889 check_no_duplicate_clause (list, OMP_CLAUSE_COLLAPSE, "collapse");
6891 loc = c_parser_peek_token (parser)->location;
6892 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6894 num = c_parser_expr_no_commas (parser, NULL).value;
6895 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6897 if (num == error_mark_node)
6899 if (!INTEGRAL_TYPE_P (TREE_TYPE (num))
6900 || !host_integerp (num, 0)
6901 || (n = tree_low_cst (num, 0)) <= 0
6905 "collapse argument needs positive constant integer expression");
6908 c = build_omp_clause (OMP_CLAUSE_COLLAPSE);
6909 OMP_CLAUSE_COLLAPSE_EXPR (c) = num;
6910 OMP_CLAUSE_CHAIN (c) = list;
6915 copyin ( variable-list ) */
6918 c_parser_omp_clause_copyin (c_parser *parser, tree list)
6920 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYIN, list);
6924 copyprivate ( variable-list ) */
6927 c_parser_omp_clause_copyprivate (c_parser *parser, tree list)
6929 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYPRIVATE, list);
6933 default ( shared | none ) */
6936 c_parser_omp_clause_default (c_parser *parser, tree list)
6938 enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED;
6941 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6943 if (c_parser_next_token_is (parser, CPP_NAME))
6945 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
6950 if (strcmp ("none", p) != 0)
6952 kind = OMP_CLAUSE_DEFAULT_NONE;
6956 if (strcmp ("shared", p) != 0)
6958 kind = OMP_CLAUSE_DEFAULT_SHARED;
6965 c_parser_consume_token (parser);
6970 c_parser_error (parser, "expected %<none%> or %<shared%>");
6972 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6974 if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED)
6977 check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default");
6978 c = build_omp_clause (OMP_CLAUSE_DEFAULT);
6979 OMP_CLAUSE_CHAIN (c) = list;
6980 OMP_CLAUSE_DEFAULT_KIND (c) = kind;
6986 firstprivate ( variable-list ) */
6989 c_parser_omp_clause_firstprivate (c_parser *parser, tree list)
6991 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_FIRSTPRIVATE, list);
6995 if ( expression ) */
6998 c_parser_omp_clause_if (c_parser *parser, tree list)
7000 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7002 tree t = c_parser_paren_condition (parser);
7005 check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if");
7007 c = build_omp_clause (OMP_CLAUSE_IF);
7008 OMP_CLAUSE_IF_EXPR (c) = t;
7009 OMP_CLAUSE_CHAIN (c) = list;
7013 c_parser_error (parser, "expected %<(%>");
7019 lastprivate ( variable-list ) */
7022 c_parser_omp_clause_lastprivate (c_parser *parser, tree list)
7024 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_LASTPRIVATE, list);
7031 c_parser_omp_clause_nowait (c_parser *parser ATTRIBUTE_UNUSED, tree list)
7035 check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait");
7037 c = build_omp_clause (OMP_CLAUSE_NOWAIT);
7038 OMP_CLAUSE_CHAIN (c) = list;
7043 num_threads ( expression ) */
7046 c_parser_omp_clause_num_threads (c_parser *parser, tree list)
7048 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7050 location_t expr_loc = c_parser_peek_token (parser)->location;
7051 tree c, t = c_parser_expression (parser).value;
7053 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7055 if (!INTEGRAL_TYPE_P (TREE_TYPE (t)))
7057 c_parser_error (parser, "expected integer expression");
7061 /* Attempt to statically determine when the number isn't positive. */
7062 c = fold_build2 (LE_EXPR, boolean_type_node, t,
7063 build_int_cst (TREE_TYPE (t), 0));
7064 if (c == boolean_true_node)
7066 warning_at (expr_loc, 0,
7067 "%<num_threads%> value must be positive");
7068 t = integer_one_node;
7071 check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads");
7073 c = build_omp_clause (OMP_CLAUSE_NUM_THREADS);
7074 OMP_CLAUSE_NUM_THREADS_EXPR (c) = t;
7075 OMP_CLAUSE_CHAIN (c) = list;
7086 c_parser_omp_clause_ordered (c_parser *parser ATTRIBUTE_UNUSED, tree list)
7090 check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered");
7092 c = build_omp_clause (OMP_CLAUSE_ORDERED);
7093 OMP_CLAUSE_CHAIN (c) = list;
7098 private ( variable-list ) */
7101 c_parser_omp_clause_private (c_parser *parser, tree list)
7103 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_PRIVATE, list);
7107 reduction ( reduction-operator : variable-list )
7110 One of: + * - & ^ | && || */
7113 c_parser_omp_clause_reduction (c_parser *parser, tree list)
7115 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7117 enum tree_code code;
7119 switch (c_parser_peek_token (parser)->type)
7131 code = BIT_AND_EXPR;
7134 code = BIT_XOR_EXPR;
7137 code = BIT_IOR_EXPR;
7140 code = TRUTH_ANDIF_EXPR;
7143 code = TRUTH_ORIF_EXPR;
7146 c_parser_error (parser,
7147 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
7148 "%<^%>, %<|%>, %<&&%>, or %<||%>");
7149 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
7152 c_parser_consume_token (parser);
7153 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
7157 nl = c_parser_omp_variable_list (parser, OMP_CLAUSE_REDUCTION, list);
7158 for (c = nl; c != list; c = OMP_CLAUSE_CHAIN (c))
7159 OMP_CLAUSE_REDUCTION_CODE (c) = code;
7163 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7169 schedule ( schedule-kind )
7170 schedule ( schedule-kind , expression )
7173 static | dynamic | guided | runtime | auto
7177 c_parser_omp_clause_schedule (c_parser *parser, tree list)
7181 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7184 c = build_omp_clause (OMP_CLAUSE_SCHEDULE);
7186 if (c_parser_next_token_is (parser, CPP_NAME))
7188 tree kind = c_parser_peek_token (parser)->value;
7189 const char *p = IDENTIFIER_POINTER (kind);
7194 if (strcmp ("dynamic", p) != 0)
7196 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC;
7200 if (strcmp ("guided", p) != 0)
7202 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED;
7206 if (strcmp ("runtime", p) != 0)
7208 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME;
7215 else if (c_parser_next_token_is_keyword (parser, RID_STATIC))
7216 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC;
7217 else if (c_parser_next_token_is_keyword (parser, RID_AUTO))
7218 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO;
7222 c_parser_consume_token (parser);
7223 if (c_parser_next_token_is (parser, CPP_COMMA))
7226 c_parser_consume_token (parser);
7228 here = c_parser_peek_token (parser)->location;
7229 t = c_parser_expr_no_commas (parser, NULL).value;
7231 if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME)
7232 error_at (here, "schedule %<runtime%> does not take "
7233 "a %<chunk_size%> parameter");
7234 else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_AUTO)
7236 "schedule %<auto%> does not take "
7237 "a %<chunk_size%> parameter");
7238 else if (TREE_CODE (TREE_TYPE (t)) == INTEGER_TYPE)
7239 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t;
7241 c_parser_error (parser, "expected integer expression");
7243 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7246 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
7247 "expected %<,%> or %<)%>");
7249 check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule");
7250 OMP_CLAUSE_CHAIN (c) = list;
7254 c_parser_error (parser, "invalid schedule kind");
7255 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
7260 shared ( variable-list ) */
7263 c_parser_omp_clause_shared (c_parser *parser, tree list)
7265 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_SHARED, list);
7272 c_parser_omp_clause_untied (c_parser *parser ATTRIBUTE_UNUSED, tree list)
7276 /* FIXME: Should we allow duplicates? */
7277 check_no_duplicate_clause (list, OMP_CLAUSE_UNTIED, "untied");
7279 c = build_omp_clause (OMP_CLAUSE_UNTIED);
7280 OMP_CLAUSE_CHAIN (c) = list;
7284 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7285 is a bitmask in MASK. Return the list of clauses found; the result
7286 of clause default goes in *pdefault. */
7289 c_parser_omp_all_clauses (c_parser *parser, unsigned int mask,
7292 tree clauses = NULL;
7295 while (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7298 pragma_omp_clause c_kind;
7300 tree prev = clauses;
7302 if (!first && c_parser_next_token_is (parser, CPP_COMMA))
7303 c_parser_consume_token (parser);
7306 here = c_parser_peek_token (parser)->location;
7307 c_kind = c_parser_omp_clause_name (parser);
7311 case PRAGMA_OMP_CLAUSE_COLLAPSE:
7312 clauses = c_parser_omp_clause_collapse (parser, clauses);
7313 c_name = "collapse";
7315 case PRAGMA_OMP_CLAUSE_COPYIN:
7316 clauses = c_parser_omp_clause_copyin (parser, clauses);
7319 case PRAGMA_OMP_CLAUSE_COPYPRIVATE:
7320 clauses = c_parser_omp_clause_copyprivate (parser, clauses);
7321 c_name = "copyprivate";
7323 case PRAGMA_OMP_CLAUSE_DEFAULT:
7324 clauses = c_parser_omp_clause_default (parser, clauses);
7327 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE:
7328 clauses = c_parser_omp_clause_firstprivate (parser, clauses);
7329 c_name = "firstprivate";
7331 case PRAGMA_OMP_CLAUSE_IF:
7332 clauses = c_parser_omp_clause_if (parser, clauses);
7335 case PRAGMA_OMP_CLAUSE_LASTPRIVATE:
7336 clauses = c_parser_omp_clause_lastprivate (parser, clauses);
7337 c_name = "lastprivate";
7339 case PRAGMA_OMP_CLAUSE_NOWAIT:
7340 clauses = c_parser_omp_clause_nowait (parser, clauses);
7343 case PRAGMA_OMP_CLAUSE_NUM_THREADS:
7344 clauses = c_parser_omp_clause_num_threads (parser, clauses);
7345 c_name = "num_threads";
7347 case PRAGMA_OMP_CLAUSE_ORDERED:
7348 clauses = c_parser_omp_clause_ordered (parser, clauses);
7351 case PRAGMA_OMP_CLAUSE_PRIVATE:
7352 clauses = c_parser_omp_clause_private (parser, clauses);
7355 case PRAGMA_OMP_CLAUSE_REDUCTION:
7356 clauses = c_parser_omp_clause_reduction (parser, clauses);
7357 c_name = "reduction";
7359 case PRAGMA_OMP_CLAUSE_SCHEDULE:
7360 clauses = c_parser_omp_clause_schedule (parser, clauses);
7361 c_name = "schedule";
7363 case PRAGMA_OMP_CLAUSE_SHARED:
7364 clauses = c_parser_omp_clause_shared (parser, clauses);
7367 case PRAGMA_OMP_CLAUSE_UNTIED:
7368 clauses = c_parser_omp_clause_untied (parser, clauses);
7372 c_parser_error (parser, "expected %<#pragma omp%> clause");
7376 if (((mask >> c_kind) & 1) == 0 && !parser->error)
7378 /* Remove the invalid clause(s) from the list to avoid
7379 confusing the rest of the compiler. */
7381 error_at (here, "%qs is not valid for %qs", c_name, where);
7386 c_parser_skip_to_pragma_eol (parser);
7388 return c_finish_omp_clauses (clauses);
7395 In practice, we're also interested in adding the statement to an
7396 outer node. So it is convenient if we work around the fact that
7397 c_parser_statement calls add_stmt. */
7400 c_parser_omp_structured_block (c_parser *parser)
7402 tree stmt = push_stmt_list ();
7403 c_parser_statement (parser);
7404 return pop_stmt_list (stmt);
7408 # pragma omp atomic new-line
7412 x binop= expr | x++ | ++x | x-- | --x
7414 +, *, -, /, &, ^, |, <<, >>
7416 where x is an lvalue expression with scalar type. */
7419 c_parser_omp_atomic (c_parser *parser)
7423 enum tree_code code;
7424 struct c_expr rhs_expr;
7426 c_parser_skip_to_pragma_eol (parser);
7428 lhs = c_parser_unary_expression (parser).value;
7429 switch (TREE_CODE (lhs))
7433 c_parser_skip_to_end_of_block_or_statement (parser);
7436 case PREINCREMENT_EXPR:
7437 case POSTINCREMENT_EXPR:
7438 lhs = TREE_OPERAND (lhs, 0);
7440 rhs = integer_one_node;
7443 case PREDECREMENT_EXPR:
7444 case POSTDECREMENT_EXPR:
7445 lhs = TREE_OPERAND (lhs, 0);
7447 rhs = integer_one_node;
7451 switch (c_parser_peek_token (parser)->type)
7457 code = TRUNC_DIV_EXPR;
7472 code = BIT_AND_EXPR;
7475 code = BIT_IOR_EXPR;
7478 code = BIT_XOR_EXPR;
7481 c_parser_error (parser,
7482 "invalid operator for %<#pragma omp atomic%>");
7486 c_parser_consume_token (parser);
7487 rhs_expr = c_parser_expression (parser);
7488 rhs_expr = default_function_array_conversion (rhs_expr);
7489 rhs = rhs_expr.value;
7492 stmt = c_finish_omp_atomic (code, lhs, rhs);
7493 if (stmt != error_mark_node)
7495 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7500 # pragma omp barrier new-line
7504 c_parser_omp_barrier (c_parser *parser)
7506 c_parser_consume_pragma (parser);
7507 c_parser_skip_to_pragma_eol (parser);
7509 c_finish_omp_barrier ();
7513 # pragma omp critical [(name)] new-line
7518 c_parser_omp_critical (c_parser *parser)
7520 tree stmt, name = NULL;
7522 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7524 c_parser_consume_token (parser);
7525 if (c_parser_next_token_is (parser, CPP_NAME))
7527 name = c_parser_peek_token (parser)->value;
7528 c_parser_consume_token (parser);
7529 c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7532 c_parser_error (parser, "expected identifier");
7534 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7535 c_parser_error (parser, "expected %<(%> or end of line");
7536 c_parser_skip_to_pragma_eol (parser);
7538 stmt = c_parser_omp_structured_block (parser);
7539 return c_finish_omp_critical (stmt, name);
7543 # pragma omp flush flush-vars[opt] new-line
7546 ( variable-list ) */
7549 c_parser_omp_flush (c_parser *parser)
7551 c_parser_consume_pragma (parser);
7552 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7553 c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL);
7554 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7555 c_parser_error (parser, "expected %<(%> or end of line");
7556 c_parser_skip_to_pragma_eol (parser);
7558 c_finish_omp_flush ();
7561 /* Parse the restricted form of the for statement allowed by OpenMP.
7562 The real trick here is to determine the loop control variable early
7563 so that we can push a new decl if necessary to make it private. */
7566 c_parser_omp_for_loop (c_parser *parser, tree clauses, tree *par_clauses)
7568 tree decl, cond, incr, save_break, save_cont, body, init, stmt, cl;
7569 tree declv, condv, incrv, initv, for_block = NULL, ret = NULL;
7571 bool fail = false, open_brace_parsed = false;
7572 int i, collapse = 1, nbraces = 0;
7574 for (cl = clauses; cl; cl = OMP_CLAUSE_CHAIN (cl))
7575 if (OMP_CLAUSE_CODE (cl) == OMP_CLAUSE_COLLAPSE)
7576 collapse = tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl), 0);
7578 gcc_assert (collapse >= 1);
7580 declv = make_tree_vec (collapse);
7581 initv = make_tree_vec (collapse);
7582 condv = make_tree_vec (collapse);
7583 incrv = make_tree_vec (collapse);
7585 if (!c_parser_next_token_is_keyword (parser, RID_FOR))
7587 c_parser_error (parser, "for statement expected");
7590 loc = c_parser_peek_token (parser)->location;
7591 c_parser_consume_token (parser);
7593 for (i = 0; i < collapse; i++)
7597 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7600 /* Parse the initialization declaration or expression. */
7601 if (c_parser_next_token_starts_declspecs (parser))
7605 = tree_cons (NULL, c_begin_compound_stmt (true), for_block);
7606 c_parser_declaration_or_fndef (parser, true, true, true, true);
7607 decl = check_for_loop_decls ();
7610 if (DECL_INITIAL (decl) == error_mark_node)
7611 decl = error_mark_node;
7614 else if (c_parser_next_token_is (parser, CPP_NAME)
7615 && c_parser_peek_2nd_token (parser)->type == CPP_EQ)
7617 struct c_expr init_exp;
7618 location_t init_loc;
7620 decl = c_parser_postfix_expression (parser).value;
7622 c_parser_require (parser, CPP_EQ, "expected %<=%>");
7623 init_loc = c_parser_peek_token (parser)->location;
7625 init_exp = c_parser_expr_no_commas (parser, NULL);
7626 init_exp = default_function_array_conversion (init_exp);
7627 init = build_modify_expr (init_loc,
7628 decl, NOP_EXPR, init_exp.value);
7629 init = c_process_expr_stmt (init);
7631 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7636 c_parser_error (parser,
7637 "expected iteration declaration or initialization");
7638 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
7644 /* Parse the loop condition. */
7646 if (c_parser_next_token_is_not (parser, CPP_SEMICOLON))
7648 location_t cond_loc = c_parser_peek_token (parser)->location;
7650 cond = c_parser_expression_conv (parser).value;
7651 cond = c_objc_common_truthvalue_conversion (cond_loc, cond);
7652 protected_set_expr_location (cond, cond_loc);
7654 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7656 /* Parse the increment expression. */
7658 if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN))
7660 location_t incr_loc = c_parser_peek_token (parser)->location;
7662 incr = c_process_expr_stmt (c_parser_expression (parser).value);
7663 protected_set_expr_location (incr, incr_loc);
7665 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7667 if (decl == NULL || decl == error_mark_node || init == error_mark_node)
7671 TREE_VEC_ELT (declv, i) = decl;
7672 TREE_VEC_ELT (initv, i) = init;
7673 TREE_VEC_ELT (condv, i) = cond;
7674 TREE_VEC_ELT (incrv, i) = incr;
7678 if (i == collapse - 1)
7681 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
7682 in between the collapsed for loops to be still considered perfectly
7683 nested. Hopefully the final version clarifies this.
7684 For now handle (multiple) {'s and empty statements. */
7687 if (c_parser_next_token_is_keyword (parser, RID_FOR))
7689 c_parser_consume_token (parser);
7692 else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
7694 c_parser_consume_token (parser);
7698 && c_parser_next_token_is (parser, CPP_SEMICOLON))
7699 c_parser_consume_token (parser);
7702 c_parser_error (parser, "not enough perfectly nested loops");
7705 open_brace_parsed = true;
7715 nbraces += bracecount;
7718 save_break = c_break_label;
7719 c_break_label = size_one_node;
7720 save_cont = c_cont_label;
7721 c_cont_label = NULL_TREE;
7722 body = push_stmt_list ();
7724 if (open_brace_parsed)
7726 stmt = c_begin_compound_stmt (true);
7727 c_parser_compound_statement_nostart (parser);
7728 add_stmt (c_end_compound_stmt (stmt, true));
7731 add_stmt (c_parser_c99_block_statement (parser));
7733 add_stmt (build1 (LABEL_EXPR, void_type_node, c_cont_label));
7735 body = pop_stmt_list (body);
7736 c_break_label = save_break;
7737 c_cont_label = save_cont;
7741 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7743 c_parser_consume_token (parser);
7746 else if (c_parser_next_token_is (parser, CPP_SEMICOLON))
7747 c_parser_consume_token (parser);
7750 c_parser_error (parser, "collapsed loops not perfectly nested");
7753 stmt = c_begin_compound_stmt (true);
7755 c_parser_compound_statement_nostart (parser);
7756 body = c_end_compound_stmt (stmt, true);
7763 /* Only bother calling c_finish_omp_for if we haven't already generated
7764 an error from the initialization parsing. */
7767 stmt = c_finish_omp_for (loc, declv, initv, condv, incrv, body, NULL);
7770 if (par_clauses != NULL)
7773 for (c = par_clauses; *c ; )
7774 if (OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_FIRSTPRIVATE
7775 && OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_LASTPRIVATE)
7776 c = &OMP_CLAUSE_CHAIN (*c);
7779 for (i = 0; i < collapse; i++)
7780 if (TREE_VEC_ELT (declv, i) == OMP_CLAUSE_DECL (*c))
7783 c = &OMP_CLAUSE_CHAIN (*c);
7784 else if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_FIRSTPRIVATE)
7787 "iteration variable %qD should not be firstprivate",
7788 OMP_CLAUSE_DECL (*c));
7789 *c = OMP_CLAUSE_CHAIN (*c);
7793 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
7794 change it to shared (decl) in
7795 OMP_PARALLEL_CLAUSES. */
7796 tree l = build_omp_clause (OMP_CLAUSE_LASTPRIVATE);
7797 OMP_CLAUSE_DECL (l) = OMP_CLAUSE_DECL (*c);
7798 OMP_CLAUSE_CHAIN (l) = clauses;
7800 OMP_CLAUSE_SET_CODE (*c, OMP_CLAUSE_SHARED);
7804 OMP_FOR_CLAUSES (stmt) = clauses;
7811 stmt = c_end_compound_stmt (TREE_VALUE (for_block), true);
7813 for_block = TREE_CHAIN (for_block);
7819 #pragma omp for for-clause[optseq] new-line
7823 #define OMP_FOR_CLAUSE_MASK \
7824 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7825 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7826 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7827 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7828 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7829 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7830 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
7831 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7834 c_parser_omp_for (c_parser *parser)
7836 tree block, clauses, ret;
7838 clauses = c_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK,
7841 block = c_begin_compound_stmt (true);
7842 ret = c_parser_omp_for_loop (parser, clauses, NULL);
7843 block = c_end_compound_stmt (block, true);
7850 # pragma omp master new-line
7855 c_parser_omp_master (c_parser *parser)
7857 c_parser_skip_to_pragma_eol (parser);
7858 return c_finish_omp_master (c_parser_omp_structured_block (parser));
7862 # pragma omp ordered new-line
7867 c_parser_omp_ordered (c_parser *parser)
7869 c_parser_skip_to_pragma_eol (parser);
7870 return c_finish_omp_ordered (c_parser_omp_structured_block (parser));
7876 { section-sequence }
7879 section-directive[opt] structured-block
7880 section-sequence section-directive structured-block */
7883 c_parser_omp_sections_scope (c_parser *parser)
7886 bool error_suppress = false;
7889 if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
7891 /* Avoid skipping until the end of the block. */
7892 parser->error = false;
7896 stmt = push_stmt_list ();
7898 loc = c_parser_peek_token (parser)->location;
7899 if (c_parser_peek_token (parser)->pragma_kind != PRAGMA_OMP_SECTION)
7901 substmt = push_stmt_list ();
7905 c_parser_statement (parser);
7907 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
7909 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7911 if (c_parser_next_token_is (parser, CPP_EOF))
7915 substmt = pop_stmt_list (substmt);
7916 substmt = build1 (OMP_SECTION, void_type_node, substmt);
7917 SET_EXPR_LOCATION (substmt, loc);
7923 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7925 if (c_parser_next_token_is (parser, CPP_EOF))
7928 loc = c_parser_peek_token (parser)->location;
7929 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
7931 c_parser_consume_pragma (parser);
7932 c_parser_skip_to_pragma_eol (parser);
7933 error_suppress = false;
7935 else if (!error_suppress)
7937 error_at (loc, "expected %<#pragma omp section%> or %<}%>");
7938 error_suppress = true;
7941 substmt = c_parser_omp_structured_block (parser);
7942 substmt = build1 (OMP_SECTION, void_type_node, substmt);
7943 SET_EXPR_LOCATION (substmt, loc);
7946 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE,
7947 "expected %<#pragma omp section%> or %<}%>");
7949 substmt = pop_stmt_list (stmt);
7951 stmt = make_node (OMP_SECTIONS);
7952 TREE_TYPE (stmt) = void_type_node;
7953 OMP_SECTIONS_BODY (stmt) = substmt;
7955 return add_stmt (stmt);
7959 # pragma omp sections sections-clause[optseq] newline
7963 #define OMP_SECTIONS_CLAUSE_MASK \
7964 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7965 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7966 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7967 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7968 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7971 c_parser_omp_sections (c_parser *parser)
7973 tree block, clauses, ret;
7975 clauses = c_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK,
7976 "#pragma omp sections");
7978 block = c_begin_compound_stmt (true);
7979 ret = c_parser_omp_sections_scope (parser);
7981 OMP_SECTIONS_CLAUSES (ret) = clauses;
7982 block = c_end_compound_stmt (block, true);
7989 # pragma parallel parallel-clause new-line
7990 # pragma parallel for parallel-for-clause new-line
7991 # pragma parallel sections parallel-sections-clause new-line
7994 #define OMP_PARALLEL_CLAUSE_MASK \
7995 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
7996 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7997 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7998 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
7999 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
8000 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
8001 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
8002 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
8005 c_parser_omp_parallel (c_parser *parser)
8007 enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL;
8008 const char *p_name = "#pragma omp parallel";
8009 tree stmt, clauses, par_clause, ws_clause, block;
8010 unsigned int mask = OMP_PARALLEL_CLAUSE_MASK;
8012 if (c_parser_next_token_is_keyword (parser, RID_FOR))
8014 c_parser_consume_token (parser);
8015 p_kind = PRAGMA_OMP_PARALLEL_FOR;
8016 p_name = "#pragma omp parallel for";
8017 mask |= OMP_FOR_CLAUSE_MASK;
8018 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
8020 else if (c_parser_next_token_is (parser, CPP_NAME))
8022 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
8023 if (strcmp (p, "sections") == 0)
8025 c_parser_consume_token (parser);
8026 p_kind = PRAGMA_OMP_PARALLEL_SECTIONS;
8027 p_name = "#pragma omp parallel sections";
8028 mask |= OMP_SECTIONS_CLAUSE_MASK;
8029 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
8033 clauses = c_parser_omp_all_clauses (parser, mask, p_name);
8037 case PRAGMA_OMP_PARALLEL:
8038 block = c_begin_omp_parallel ();
8039 c_parser_statement (parser);
8040 stmt = c_finish_omp_parallel (clauses, block);
8043 case PRAGMA_OMP_PARALLEL_FOR:
8044 block = c_begin_omp_parallel ();
8045 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
8046 c_parser_omp_for_loop (parser, ws_clause, &par_clause);
8047 stmt = c_finish_omp_parallel (par_clause, block);
8048 OMP_PARALLEL_COMBINED (stmt) = 1;
8051 case PRAGMA_OMP_PARALLEL_SECTIONS:
8052 block = c_begin_omp_parallel ();
8053 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
8054 stmt = c_parser_omp_sections_scope (parser);
8056 OMP_SECTIONS_CLAUSES (stmt) = ws_clause;
8057 stmt = c_finish_omp_parallel (par_clause, block);
8058 OMP_PARALLEL_COMBINED (stmt) = 1;
8069 # pragma omp single single-clause[optseq] new-line
8073 #define OMP_SINGLE_CLAUSE_MASK \
8074 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8075 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8076 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
8077 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
8080 c_parser_omp_single (c_parser *parser)
8082 tree stmt = make_node (OMP_SINGLE);
8083 TREE_TYPE (stmt) = void_type_node;
8085 OMP_SINGLE_CLAUSES (stmt)
8086 = c_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK,
8087 "#pragma omp single");
8088 OMP_SINGLE_BODY (stmt) = c_parser_omp_structured_block (parser);
8090 return add_stmt (stmt);
8094 # pragma omp task task-clause[optseq] new-line
8097 #define OMP_TASK_CLAUSE_MASK \
8098 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8099 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
8100 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8101 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8102 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8103 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
8106 c_parser_omp_task (c_parser *parser)
8108 tree clauses, block;
8110 clauses = c_parser_omp_all_clauses (parser, OMP_TASK_CLAUSE_MASK,
8111 "#pragma omp task");
8113 block = c_begin_omp_task ();
8114 c_parser_statement (parser);
8115 return c_finish_omp_task (clauses, block);
8119 # pragma omp taskwait new-line
8123 c_parser_omp_taskwait (c_parser *parser)
8125 c_parser_consume_pragma (parser);
8126 c_parser_skip_to_pragma_eol (parser);
8128 c_finish_omp_taskwait ();
8131 /* Main entry point to parsing most OpenMP pragmas. */
8134 c_parser_omp_construct (c_parser *parser)
8136 enum pragma_kind p_kind;
8140 loc = c_parser_peek_token (parser)->location;
8141 p_kind = c_parser_peek_token (parser)->pragma_kind;
8142 c_parser_consume_pragma (parser);
8144 /* For all constructs below except #pragma omp atomic
8145 MUST_NOT_THROW catch handlers are needed when exceptions
8147 if (p_kind != PRAGMA_OMP_ATOMIC)
8148 c_maybe_initialize_eh ();
8152 case PRAGMA_OMP_ATOMIC:
8153 c_parser_omp_atomic (parser);
8155 case PRAGMA_OMP_CRITICAL:
8156 stmt = c_parser_omp_critical (parser);
8158 case PRAGMA_OMP_FOR:
8159 stmt = c_parser_omp_for (parser);
8161 case PRAGMA_OMP_MASTER:
8162 stmt = c_parser_omp_master (parser);
8164 case PRAGMA_OMP_ORDERED:
8165 stmt = c_parser_omp_ordered (parser);
8167 case PRAGMA_OMP_PARALLEL:
8168 stmt = c_parser_omp_parallel (parser);
8170 case PRAGMA_OMP_SECTIONS:
8171 stmt = c_parser_omp_sections (parser);
8173 case PRAGMA_OMP_SINGLE:
8174 stmt = c_parser_omp_single (parser);
8176 case PRAGMA_OMP_TASK:
8177 stmt = c_parser_omp_task (parser);
8184 SET_EXPR_LOCATION (stmt, loc);
8189 # pragma omp threadprivate (variable-list) */
8192 c_parser_omp_threadprivate (c_parser *parser)
8196 c_parser_consume_pragma (parser);
8197 vars = c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL);
8199 /* Mark every variable in VARS to be assigned thread local storage. */
8200 for (t = vars; t; t = TREE_CHAIN (t))
8202 tree v = TREE_PURPOSE (t);
8204 /* If V had already been marked threadprivate, it doesn't matter
8205 whether it had been used prior to this point. */
8206 if (TREE_CODE (v) != VAR_DECL)
8207 error ("%qD is not a variable", v);
8208 else if (TREE_USED (v) && !C_DECL_THREADPRIVATE_P (v))
8209 error ("%qE declared %<threadprivate%> after first use", v);
8210 else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v))
8211 error ("automatic variable %qE cannot be %<threadprivate%>", v);
8212 else if (TREE_TYPE (v) == error_mark_node)
8214 else if (! COMPLETE_TYPE_P (TREE_TYPE (v)))
8215 error ("%<threadprivate%> %qE has incomplete type", v);
8218 if (! DECL_THREAD_LOCAL_P (v))
8220 DECL_TLS_MODEL (v) = decl_default_tls_model (v);
8221 /* If rtl has been already set for this var, call
8222 make_decl_rtl once again, so that encode_section_info
8223 has a chance to look at the new decl flags. */
8224 if (DECL_RTL_SET_P (v))
8227 C_DECL_THREADPRIVATE_P (v) = 1;
8231 c_parser_skip_to_pragma_eol (parser);
8235 /* Parse a single source file. */
8240 /* Use local storage to begin. If the first token is a pragma, parse it.
8241 If it is #pragma GCC pch_preprocess, then this will load a PCH file
8242 which will cause garbage collection. */
8245 memset (&tparser, 0, sizeof tparser);
8246 the_parser = &tparser;
8248 if (c_parser_peek_token (&tparser)->pragma_kind == PRAGMA_GCC_PCH_PREPROCESS)
8249 c_parser_pragma_pch_preprocess (&tparser);
8251 the_parser = GGC_NEW (c_parser);
8252 *the_parser = tparser;
8254 c_parser_translation_unit (the_parser);
8258 #include "gt-c-parser.h"