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 %<{%>"))
3311 /* Ensure a scope is entered and left anyway to avoid confusion
3312 if we have just prepared to enter a function body. */
3313 stmt = c_begin_compound_stmt (true);
3314 c_end_compound_stmt (stmt, true);
3315 return error_mark_node;
3317 stmt = c_begin_compound_stmt (true);
3318 c_parser_compound_statement_nostart (parser);
3319 return c_end_compound_stmt (stmt, true);
3322 /* Parse a compound statement except for the opening brace. This is
3323 used for parsing both compound statements and statement expressions
3324 (which follow different paths to handling the opening). */
3327 c_parser_compound_statement_nostart (c_parser *parser)
3329 bool last_stmt = false;
3330 bool last_label = false;
3331 location_t label_loc = UNKNOWN_LOCATION; /* Quiet warning. */
3332 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3334 c_parser_consume_token (parser);
3337 if (c_parser_next_token_is_keyword (parser, RID_LABEL))
3339 location_t err_loc = c_parser_peek_token (parser)->location;
3340 /* Read zero or more forward-declarations for labels that nested
3341 functions can jump to. */
3342 while (c_parser_next_token_is_keyword (parser, RID_LABEL))
3344 c_parser_consume_token (parser);
3345 /* Any identifiers, including those declared as type names,
3350 if (c_parser_next_token_is_not (parser, CPP_NAME))
3352 c_parser_error (parser, "expected identifier");
3356 = declare_label (c_parser_peek_token (parser)->value);
3357 C_DECLARED_LABEL_FLAG (label) = 1;
3358 add_stmt (build_stmt (DECL_EXPR, label));
3359 c_parser_consume_token (parser);
3360 if (c_parser_next_token_is (parser, CPP_COMMA))
3361 c_parser_consume_token (parser);
3365 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
3367 pedwarn (err_loc, OPT_pedantic, "ISO C forbids label declarations");
3369 /* We must now have at least one statement, label or declaration. */
3370 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3372 c_parser_error (parser, "expected declaration or statement");
3373 c_parser_consume_token (parser);
3376 while (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE))
3378 location_t loc = c_parser_peek_token (parser)->location;
3379 if (c_parser_next_token_is_keyword (parser, RID_CASE)
3380 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3381 || (c_parser_next_token_is (parser, CPP_NAME)
3382 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3384 if (c_parser_next_token_is_keyword (parser, RID_CASE))
3385 label_loc = c_parser_peek_2nd_token (parser)->location;
3387 label_loc = c_parser_peek_token (parser)->location;
3390 c_parser_label (parser);
3392 else if (!last_label
3393 && c_parser_next_token_starts_declspecs (parser))
3396 c_parser_declaration_or_fndef (parser, true, true, true, true);
3399 (pedantic && !flag_isoc99)
3401 : OPT_Wdeclaration_after_statement,
3402 "ISO C90 forbids mixed declarations and code");
3405 else if (!last_label
3406 && c_parser_next_token_is_keyword (parser, RID_EXTENSION))
3408 /* __extension__ can start a declaration, but is also an
3409 unary operator that can start an expression. Consume all
3410 but the last of a possible series of __extension__ to
3412 while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD
3413 && (c_parser_peek_2nd_token (parser)->keyword
3415 c_parser_consume_token (parser);
3416 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser)))
3419 ext = disable_extension_diagnostics ();
3420 c_parser_consume_token (parser);
3422 c_parser_declaration_or_fndef (parser, true, true, true, true);
3423 /* Following the old parser, __extension__ does not
3424 disable this diagnostic. */
3425 restore_extension_diagnostics (ext);
3427 pedwarn_c90 (loc, (pedantic && !flag_isoc99)
3429 : OPT_Wdeclaration_after_statement,
3430 "ISO C90 forbids mixed declarations and code");
3436 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
3438 /* External pragmas, and some omp pragmas, are not associated
3439 with regular c code, and so are not to be considered statements
3440 syntactically. This ensures that the user doesn't put them
3441 places that would turn into syntax errors if the directive
3443 if (c_parser_pragma (parser, pragma_compound))
3444 last_label = false, last_stmt = true;
3446 else if (c_parser_next_token_is (parser, CPP_EOF))
3448 c_parser_error (parser, "expected declaration or statement");
3451 else if (c_parser_next_token_is_keyword (parser, RID_ELSE))
3453 if (parser->in_if_block)
3455 error_at (loc, """expected %<}%> before %<else%>");
3460 error_at (loc, "%<else%> without a previous %<if%>");
3461 c_parser_consume_token (parser);
3470 c_parser_statement_after_labels (parser);
3473 parser->error = false;
3476 error_at (label_loc, "label at end of compound statement");
3477 c_parser_consume_token (parser);
3480 /* Parse a label (C90 6.6.1, C99 6.8.1).
3483 identifier : attributes[opt]
3484 case constant-expression :
3490 case constant-expression ... constant-expression :
3492 The use of attributes on labels is a GNU extension. The syntax in
3493 GNU C accepts any expressions without commas, non-constant
3494 expressions being rejected later. */
3497 c_parser_label (c_parser *parser)
3499 location_t loc1 = c_parser_peek_token (parser)->location;
3500 tree label = NULL_TREE;
3501 if (c_parser_next_token_is_keyword (parser, RID_CASE))
3504 c_parser_consume_token (parser);
3505 exp1 = c_parser_expr_no_commas (parser, NULL).value;
3506 if (c_parser_next_token_is (parser, CPP_COLON))
3508 c_parser_consume_token (parser);
3509 label = do_case (exp1, NULL_TREE);
3511 else if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
3513 c_parser_consume_token (parser);
3514 exp2 = c_parser_expr_no_commas (parser, NULL).value;
3515 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
3516 label = do_case (exp1, exp2);
3519 c_parser_error (parser, "expected %<:%> or %<...%>");
3521 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
3523 c_parser_consume_token (parser);
3524 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
3525 label = do_case (NULL_TREE, NULL_TREE);
3529 tree name = c_parser_peek_token (parser)->value;
3532 location_t loc2 = c_parser_peek_token (parser)->location;
3533 gcc_assert (c_parser_next_token_is (parser, CPP_NAME));
3534 c_parser_consume_token (parser);
3535 gcc_assert (c_parser_next_token_is (parser, CPP_COLON));
3536 c_parser_consume_token (parser);
3537 attrs = c_parser_attributes (parser);
3538 tlab = define_label (loc2, name);
3541 decl_attributes (&tlab, attrs, 0);
3542 label = add_stmt (build_stmt (LABEL_EXPR, tlab));
3547 SET_EXPR_LOCATION (label, loc1);
3548 if (c_parser_next_token_starts_declspecs (parser)
3549 && !(c_parser_next_token_is (parser, CPP_NAME)
3550 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3552 error_at (c_parser_peek_token (parser)->location,
3553 "a label can only be part of a statement and "
3554 "a declaration is not a statement");
3555 c_parser_declaration_or_fndef (parser, /*fndef_ok*/ false,
3556 /*nested*/ true, /*empty_ok*/ false,
3557 /*start_attr_ok*/ true);
3562 /* Parse a statement (C90 6.6, C99 6.8).
3567 expression-statement
3575 expression-statement:
3578 selection-statement:
3582 iteration-statement:
3591 return expression[opt] ;
3604 objc-throw-statement
3605 objc-try-catch-statement
3606 objc-synchronized-statement
3608 objc-throw-statement:
3622 parallel-for-construct
3623 parallel-sections-construct
3630 parallel-directive structured-block
3633 for-directive iteration-statement
3636 sections-directive section-scope
3639 single-directive structured-block
3641 parallel-for-construct:
3642 parallel-for-directive iteration-statement
3644 parallel-sections-construct:
3645 parallel-sections-directive section-scope
3648 master-directive structured-block
3651 critical-directive structured-block
3654 atomic-directive expression-statement
3657 ordered-directive structured-block */
3660 c_parser_statement (c_parser *parser)
3662 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3663 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3664 || (c_parser_next_token_is (parser, CPP_NAME)
3665 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3666 c_parser_label (parser);
3667 c_parser_statement_after_labels (parser);
3670 /* Parse a statement, other than a labeled statement. */
3673 c_parser_statement_after_labels (c_parser *parser)
3675 location_t loc = c_parser_peek_token (parser)->location;
3676 tree stmt = NULL_TREE;
3677 bool in_if_block = parser->in_if_block;
3678 parser->in_if_block = false;
3679 switch (c_parser_peek_token (parser)->type)
3681 case CPP_OPEN_BRACE:
3682 add_stmt (c_parser_compound_statement (parser));
3685 switch (c_parser_peek_token (parser)->keyword)
3688 c_parser_if_statement (parser);
3691 c_parser_switch_statement (parser);
3694 c_parser_while_statement (parser);
3697 c_parser_do_statement (parser);
3700 c_parser_for_statement (parser);
3703 c_parser_consume_token (parser);
3704 if (c_parser_next_token_is (parser, CPP_NAME))
3706 stmt = c_finish_goto_label (c_parser_peek_token (parser)->value);
3707 c_parser_consume_token (parser);
3709 else if (c_parser_next_token_is (parser, CPP_MULT))
3711 c_parser_consume_token (parser);
3712 stmt = c_finish_goto_ptr (c_parser_expression (parser).value);
3715 c_parser_error (parser, "expected identifier or %<*%>");
3716 goto expect_semicolon;
3718 c_parser_consume_token (parser);
3719 stmt = c_finish_bc_stmt (&c_cont_label, false);
3720 goto expect_semicolon;
3722 c_parser_consume_token (parser);
3723 stmt = c_finish_bc_stmt (&c_break_label, true);
3724 goto expect_semicolon;
3726 c_parser_consume_token (parser);
3727 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3729 stmt = c_finish_return (NULL_TREE);
3730 c_parser_consume_token (parser);
3734 stmt = c_finish_return (c_parser_expression_conv (parser).value);
3735 goto expect_semicolon;
3739 stmt = c_parser_asm_statement (parser);
3742 gcc_assert (c_dialect_objc ());
3743 c_parser_consume_token (parser);
3744 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3746 stmt = objc_build_throw_stmt (NULL_TREE);
3747 c_parser_consume_token (parser);
3752 = objc_build_throw_stmt (c_parser_expression (parser).value);
3753 goto expect_semicolon;
3757 gcc_assert (c_dialect_objc ());
3758 c_parser_objc_try_catch_statement (parser);
3760 case RID_AT_SYNCHRONIZED:
3761 gcc_assert (c_dialect_objc ());
3762 c_parser_objc_synchronized_statement (parser);
3769 c_parser_consume_token (parser);
3771 case CPP_CLOSE_PAREN:
3772 case CPP_CLOSE_SQUARE:
3773 /* Avoid infinite loop in error recovery:
3774 c_parser_skip_until_found stops at a closing nesting
3775 delimiter without consuming it, but here we need to consume
3776 it to proceed further. */
3777 c_parser_error (parser, "expected statement");
3778 c_parser_consume_token (parser);
3781 c_parser_pragma (parser, pragma_stmt);
3785 stmt = c_finish_expr_stmt (c_parser_expression_conv (parser).value);
3787 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
3790 /* Two cases cannot and do not have line numbers associated: If stmt
3791 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3792 cannot hold line numbers. But that's OK because the statement
3793 will either be changed to a MODIFY_EXPR during gimplification of
3794 the statement expr, or discarded. If stmt was compound, but
3795 without new variables, we will have skipped the creation of a
3796 BIND and will have a bare STATEMENT_LIST. But that's OK because
3797 (recursively) all of the component statements should already have
3798 line numbers assigned. ??? Can we discard no-op statements
3800 protected_set_expr_location (stmt, loc);
3802 parser->in_if_block = in_if_block;
3805 /* Parse the condition from an if, do, while or for statements. */
3808 c_parser_condition (c_parser *parser)
3812 loc = c_parser_peek_token (parser)->location;
3813 cond = c_objc_common_truthvalue_conversion
3814 (loc, c_parser_expression_conv (parser).value);
3815 protected_set_expr_location (cond, loc);
3816 if (warn_sequence_point)
3817 verify_sequence_points (cond);
3821 /* Parse a parenthesized condition from an if, do or while statement.
3827 c_parser_paren_condition (c_parser *parser)
3830 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3831 return error_mark_node;
3832 cond = c_parser_condition (parser);
3833 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
3837 /* Parse a statement which is a block in C99. */
3840 c_parser_c99_block_statement (c_parser *parser)
3842 tree block = c_begin_compound_stmt (flag_isoc99);
3843 c_parser_statement (parser);
3844 return c_end_compound_stmt (block, flag_isoc99);
3847 /* Parse the body of an if statement. This is just parsing a
3848 statement but (a) it is a block in C99, (b) we track whether the
3849 body is an if statement for the sake of -Wparentheses warnings, (c)
3850 we handle an empty body specially for the sake of -Wempty-body
3851 warnings, and (d) we call parser_compound_statement directly
3852 because c_parser_statement_after_labels resets
3853 parser->in_if_block. */
3856 c_parser_if_body (c_parser *parser, bool *if_p)
3858 tree block = c_begin_compound_stmt (flag_isoc99);
3859 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3860 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3861 || (c_parser_next_token_is (parser, CPP_NAME)
3862 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3863 c_parser_label (parser);
3864 *if_p = c_parser_next_token_is_keyword (parser, RID_IF);
3865 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3867 location_t loc = c_parser_peek_token (parser)->location;
3868 add_stmt (build_empty_stmt ());
3869 c_parser_consume_token (parser);
3870 if (!c_parser_next_token_is_keyword (parser, RID_ELSE))
3871 warning_at (loc, OPT_Wempty_body,
3872 "suggest braces around empty body in an %<if%> statement");
3874 else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
3875 add_stmt (c_parser_compound_statement (parser));
3877 c_parser_statement_after_labels (parser);
3878 return c_end_compound_stmt (block, flag_isoc99);
3881 /* Parse the else body of an if statement. This is just parsing a
3882 statement but (a) it is a block in C99, (b) we handle an empty body
3883 specially for the sake of -Wempty-body warnings. */
3886 c_parser_else_body (c_parser *parser)
3888 tree block = c_begin_compound_stmt (flag_isoc99);
3889 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3890 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3891 || (c_parser_next_token_is (parser, CPP_NAME)
3892 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3893 c_parser_label (parser);
3894 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3896 warning_at (c_parser_peek_token (parser)->location,
3898 "suggest braces around empty body in an %<else%> statement");
3899 add_stmt (build_empty_stmt ());
3900 c_parser_consume_token (parser);
3903 c_parser_statement_after_labels (parser);
3904 return c_end_compound_stmt (block, flag_isoc99);
3907 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3910 if ( expression ) statement
3911 if ( expression ) statement else statement
3915 c_parser_if_statement (c_parser *parser)
3920 bool first_if = false;
3921 tree first_body, second_body;
3924 gcc_assert (c_parser_next_token_is_keyword (parser, RID_IF));
3925 c_parser_consume_token (parser);
3926 block = c_begin_compound_stmt (flag_isoc99);
3927 loc = c_parser_peek_token (parser)->location;
3928 cond = c_parser_paren_condition (parser);
3929 in_if_block = parser->in_if_block;
3930 parser->in_if_block = true;
3931 first_body = c_parser_if_body (parser, &first_if);
3932 parser->in_if_block = in_if_block;
3933 if (c_parser_next_token_is_keyword (parser, RID_ELSE))
3935 c_parser_consume_token (parser);
3936 second_body = c_parser_else_body (parser);
3939 second_body = NULL_TREE;
3940 c_finish_if_stmt (loc, cond, first_body, second_body, first_if);
3941 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3944 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3947 switch (expression) statement
3951 c_parser_switch_statement (c_parser *parser)
3953 tree block, expr, body, save_break;
3954 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SWITCH));
3955 c_parser_consume_token (parser);
3956 block = c_begin_compound_stmt (flag_isoc99);
3957 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3959 expr = c_parser_expression (parser).value;
3960 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
3963 expr = error_mark_node;
3964 c_start_case (expr);
3965 save_break = c_break_label;
3966 c_break_label = NULL_TREE;
3967 body = c_parser_c99_block_statement (parser);
3968 c_finish_case (body);
3970 add_stmt (build1 (LABEL_EXPR, void_type_node, c_break_label));
3971 c_break_label = save_break;
3972 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3975 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
3978 while (expression) statement
3982 c_parser_while_statement (c_parser *parser)
3984 tree block, cond, body, save_break, save_cont;
3986 gcc_assert (c_parser_next_token_is_keyword (parser, RID_WHILE));
3987 c_parser_consume_token (parser);
3988 block = c_begin_compound_stmt (flag_isoc99);
3989 loc = c_parser_peek_token (parser)->location;
3990 cond = c_parser_paren_condition (parser);
3991 save_break = c_break_label;
3992 c_break_label = NULL_TREE;
3993 save_cont = c_cont_label;
3994 c_cont_label = NULL_TREE;
3995 body = c_parser_c99_block_statement (parser);
3996 c_finish_loop (loc, cond, NULL, body, c_break_label, c_cont_label, true);
3997 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3998 c_break_label = save_break;
3999 c_cont_label = save_cont;
4002 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
4005 do statement while ( expression ) ;
4009 c_parser_do_statement (c_parser *parser)
4011 tree block, cond, body, save_break, save_cont, new_break, new_cont;
4013 gcc_assert (c_parser_next_token_is_keyword (parser, RID_DO));
4014 c_parser_consume_token (parser);
4015 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4016 warning_at (c_parser_peek_token (parser)->location,
4018 "suggest braces around empty body in %<do%> statement");
4019 block = c_begin_compound_stmt (flag_isoc99);
4020 loc = c_parser_peek_token (parser)->location;
4021 save_break = c_break_label;
4022 c_break_label = NULL_TREE;
4023 save_cont = c_cont_label;
4024 c_cont_label = NULL_TREE;
4025 body = c_parser_c99_block_statement (parser);
4026 c_parser_require_keyword (parser, RID_WHILE, "expected %<while%>");
4027 new_break = c_break_label;
4028 c_break_label = save_break;
4029 new_cont = c_cont_label;
4030 c_cont_label = save_cont;
4031 cond = c_parser_paren_condition (parser);
4032 if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
4033 c_parser_skip_to_end_of_block_or_statement (parser);
4034 c_finish_loop (loc, cond, NULL, body, new_break, new_cont, false);
4035 add_stmt (c_end_compound_stmt (block, flag_isoc99));
4038 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4041 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4042 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4044 The form with a declaration is new in C99.
4046 ??? In accordance with the old parser, the declaration may be a
4047 nested function, which is then rejected in check_for_loop_decls,
4048 but does it make any sense for this to be included in the grammar?
4049 Note in particular that the nested function does not include a
4050 trailing ';', whereas the "declaration" production includes one.
4051 Also, can we reject bad declarations earlier and cheaper than
4052 check_for_loop_decls? */
4055 c_parser_for_statement (c_parser *parser)
4057 tree block, cond, incr, save_break, save_cont, body;
4059 gcc_assert (c_parser_next_token_is_keyword (parser, RID_FOR));
4060 loc = c_parser_peek_token (parser)->location;
4061 c_parser_consume_token (parser);
4062 block = c_begin_compound_stmt (flag_isoc99);
4063 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4065 /* Parse the initialization declaration or expression. */
4066 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4068 c_parser_consume_token (parser);
4069 c_finish_expr_stmt (NULL_TREE);
4071 else if (c_parser_next_token_starts_declspecs (parser))
4073 c_parser_declaration_or_fndef (parser, true, true, true, true);
4074 check_for_loop_decls ();
4076 else if (c_parser_next_token_is_keyword (parser, RID_EXTENSION))
4078 /* __extension__ can start a declaration, but is also an
4079 unary operator that can start an expression. Consume all
4080 but the last of a possible series of __extension__ to
4082 while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD
4083 && (c_parser_peek_2nd_token (parser)->keyword
4085 c_parser_consume_token (parser);
4086 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser)))
4089 ext = disable_extension_diagnostics ();
4090 c_parser_consume_token (parser);
4091 c_parser_declaration_or_fndef (parser, true, true, true, true);
4092 restore_extension_diagnostics (ext);
4093 check_for_loop_decls ();
4101 c_finish_expr_stmt (c_parser_expression (parser).value);
4102 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4104 /* Parse the loop condition. */
4105 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4107 c_parser_consume_token (parser);
4112 cond = c_parser_condition (parser);
4113 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4115 /* Parse the increment expression. */
4116 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4117 incr = c_process_expr_stmt (NULL_TREE);
4119 incr = c_process_expr_stmt (c_parser_expression (parser).value);
4120 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4124 cond = error_mark_node;
4125 incr = error_mark_node;
4127 save_break = c_break_label;
4128 c_break_label = NULL_TREE;
4129 save_cont = c_cont_label;
4130 c_cont_label = NULL_TREE;
4131 body = c_parser_c99_block_statement (parser);
4132 c_finish_loop (loc, cond, incr, body, c_break_label, c_cont_label, true);
4133 add_stmt (c_end_compound_stmt (block, flag_isoc99));
4134 c_break_label = save_break;
4135 c_cont_label = save_cont;
4138 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4139 statement with inputs, outputs, clobbers, and volatile tag
4143 asm type-qualifier[opt] ( asm-argument ) ;
4147 asm-string-literal : asm-operands[opt]
4148 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4149 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4151 Qualifiers other than volatile are accepted in the syntax but
4155 c_parser_asm_statement (c_parser *parser)
4157 tree quals, str, outputs, inputs, clobbers, ret;
4159 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM));
4160 c_parser_consume_token (parser);
4161 if (c_parser_next_token_is_keyword (parser, RID_VOLATILE))
4163 quals = c_parser_peek_token (parser)->value;
4164 c_parser_consume_token (parser);
4166 else if (c_parser_next_token_is_keyword (parser, RID_CONST)
4167 || c_parser_next_token_is_keyword (parser, RID_RESTRICT))
4169 warning_at (c_parser_peek_token (parser)->location,
4171 "%E qualifier ignored on asm",
4172 c_parser_peek_token (parser)->value);
4174 c_parser_consume_token (parser);
4178 /* ??? Follow the C++ parser rather than using the
4179 lex_untranslated_string kludge. */
4180 parser->lex_untranslated_string = true;
4181 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4183 parser->lex_untranslated_string = false;
4186 str = c_parser_asm_string_literal (parser);
4187 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4190 outputs = NULL_TREE;
4192 clobbers = NULL_TREE;
4195 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4197 parser->lex_untranslated_string = false;
4198 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4202 /* Parse outputs. */
4203 if (c_parser_next_token_is (parser, CPP_COLON)
4204 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4205 outputs = NULL_TREE;
4207 outputs = c_parser_asm_operands (parser, false);
4208 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4211 clobbers = NULL_TREE;
4214 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4216 parser->lex_untranslated_string = false;
4217 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4221 if (c_parser_next_token_is (parser, CPP_COLON)
4222 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4225 inputs = c_parser_asm_operands (parser, true);
4226 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4228 clobbers = NULL_TREE;
4231 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4233 parser->lex_untranslated_string = false;
4234 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4237 /* Parse clobbers. */
4238 clobbers = c_parser_asm_clobbers (parser);
4240 parser->lex_untranslated_string = false;
4241 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
4243 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4246 if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
4247 c_parser_skip_to_end_of_block_or_statement (parser);
4248 ret = build_asm_stmt (quals, build_asm_expr (str, outputs, inputs,
4253 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4254 not outputs), apply the default conversion of functions and arrays
4259 asm-operands , asm-operand
4262 asm-string-literal ( expression )
4263 [ identifier ] asm-string-literal ( expression )
4267 c_parser_asm_operands (c_parser *parser, bool convert_p)
4269 tree list = NULL_TREE;
4274 if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
4276 c_parser_consume_token (parser);
4277 if (c_parser_next_token_is (parser, CPP_NAME))
4279 tree id = c_parser_peek_token (parser)->value;
4280 c_parser_consume_token (parser);
4281 name = build_string (IDENTIFIER_LENGTH (id),
4282 IDENTIFIER_POINTER (id));
4286 c_parser_error (parser, "expected identifier");
4287 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, NULL);
4290 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
4295 str = c_parser_asm_string_literal (parser);
4296 if (str == NULL_TREE)
4298 parser->lex_untranslated_string = false;
4299 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4301 parser->lex_untranslated_string = true;
4304 expr = c_parser_expression (parser);
4306 expr = default_function_array_conversion (expr);
4307 parser->lex_untranslated_string = true;
4308 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
4310 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4313 list = chainon (list, build_tree_list (build_tree_list (name, str),
4315 if (c_parser_next_token_is (parser, CPP_COMMA))
4316 c_parser_consume_token (parser);
4323 /* Parse asm clobbers, a GNU extension.
4327 asm-clobbers , asm-string-literal
4331 c_parser_asm_clobbers (c_parser *parser)
4333 tree list = NULL_TREE;
4336 tree str = c_parser_asm_string_literal (parser);
4338 list = tree_cons (NULL_TREE, str, list);
4341 if (c_parser_next_token_is (parser, CPP_COMMA))
4342 c_parser_consume_token (parser);
4349 /* Parse an expression other than a compound expression; that is, an
4350 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4351 NULL then it is an Objective-C message expression which is the
4352 primary-expression starting the expression as an initializer.
4354 assignment-expression:
4355 conditional-expression
4356 unary-expression assignment-operator assignment-expression
4358 assignment-operator: one of
4359 = *= /= %= += -= <<= >>= &= ^= |=
4361 In GNU C we accept any conditional expression on the LHS and
4362 diagnose the invalid lvalue rather than producing a syntax
4365 static struct c_expr
4366 c_parser_expr_no_commas (c_parser *parser, struct c_expr *after)
4368 struct c_expr lhs, rhs, ret;
4369 enum tree_code code;
4370 location_t op_location;
4371 gcc_assert (!after || c_dialect_objc ());
4372 lhs = c_parser_conditional_expression (parser, after);
4373 op_location = c_parser_peek_token (parser)->location;
4374 switch (c_parser_peek_token (parser)->type)
4383 code = TRUNC_DIV_EXPR;
4386 code = TRUNC_MOD_EXPR;
4401 code = BIT_AND_EXPR;
4404 code = BIT_XOR_EXPR;
4407 code = BIT_IOR_EXPR;
4412 c_parser_consume_token (parser);
4413 rhs = c_parser_expr_no_commas (parser, NULL);
4414 rhs = default_function_array_conversion (rhs);
4415 ret.value = build_modify_expr (op_location, lhs.value, code, rhs.value);
4416 if (code == NOP_EXPR)
4417 ret.original_code = MODIFY_EXPR;
4420 TREE_NO_WARNING (ret.value) = 1;
4421 ret.original_code = ERROR_MARK;
4426 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4427 is not NULL then it is an Objective-C message expression which is
4428 the primary-expression starting the expression as an initializer.
4430 conditional-expression:
4431 logical-OR-expression
4432 logical-OR-expression ? expression : conditional-expression
4436 conditional-expression:
4437 logical-OR-expression ? : conditional-expression
4440 static struct c_expr
4441 c_parser_conditional_expression (c_parser *parser, struct c_expr *after)
4443 struct c_expr cond, exp1, exp2, ret;
4444 location_t cond_loc;
4446 gcc_assert (!after || c_dialect_objc ());
4448 cond_loc = c_parser_peek_token (parser)->location;
4449 cond = c_parser_binary_expression (parser, after);
4450 protected_set_expr_location (cond.value, cond_loc);
4452 if (c_parser_next_token_is_not (parser, CPP_QUERY))
4454 cond = default_function_array_conversion (cond);
4455 c_parser_consume_token (parser);
4456 if (c_parser_next_token_is (parser, CPP_COLON))
4458 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
4459 "ISO C forbids omitting the middle term of a ?: expression");
4460 /* Make sure first operand is calculated only once. */
4461 exp1.value = save_expr (default_conversion (cond.value));
4462 cond.value = c_objc_common_truthvalue_conversion (cond_loc, exp1.value);
4463 skip_evaluation += cond.value == truthvalue_true_node;
4468 = c_objc_common_truthvalue_conversion
4469 (cond_loc, default_conversion (cond.value));
4470 skip_evaluation += cond.value == truthvalue_false_node;
4471 exp1 = c_parser_expression_conv (parser);
4472 skip_evaluation += ((cond.value == truthvalue_true_node)
4473 - (cond.value == truthvalue_false_node));
4475 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
4477 skip_evaluation -= cond.value == truthvalue_true_node;
4478 ret.value = error_mark_node;
4479 ret.original_code = ERROR_MARK;
4482 exp2 = c_parser_conditional_expression (parser, NULL);
4483 exp2 = default_function_array_conversion (exp2);
4484 skip_evaluation -= cond.value == truthvalue_true_node;
4485 ret.value = build_conditional_expr (cond.value, exp1.value, exp2.value);
4486 ret.original_code = ERROR_MARK;
4490 /* Parse a binary expression; that is, a logical-OR-expression (C90
4491 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4492 an Objective-C message expression which is the primary-expression
4493 starting the expression as an initializer.
4495 multiplicative-expression:
4497 multiplicative-expression * cast-expression
4498 multiplicative-expression / cast-expression
4499 multiplicative-expression % cast-expression
4501 additive-expression:
4502 multiplicative-expression
4503 additive-expression + multiplicative-expression
4504 additive-expression - multiplicative-expression
4508 shift-expression << additive-expression
4509 shift-expression >> additive-expression
4511 relational-expression:
4513 relational-expression < shift-expression
4514 relational-expression > shift-expression
4515 relational-expression <= shift-expression
4516 relational-expression >= shift-expression
4518 equality-expression:
4519 relational-expression
4520 equality-expression == relational-expression
4521 equality-expression != relational-expression
4525 AND-expression & equality-expression
4527 exclusive-OR-expression:
4529 exclusive-OR-expression ^ AND-expression
4531 inclusive-OR-expression:
4532 exclusive-OR-expression
4533 inclusive-OR-expression | exclusive-OR-expression
4535 logical-AND-expression:
4536 inclusive-OR-expression
4537 logical-AND-expression && inclusive-OR-expression
4539 logical-OR-expression:
4540 logical-AND-expression
4541 logical-OR-expression || logical-AND-expression
4544 static struct c_expr
4545 c_parser_binary_expression (c_parser *parser, struct c_expr *after)
4547 /* A binary expression is parsed using operator-precedence parsing,
4548 with the operands being cast expressions. All the binary
4549 operators are left-associative. Thus a binary expression is of
4552 E0 op1 E1 op2 E2 ...
4554 which we represent on a stack. On the stack, the precedence
4555 levels are strictly increasing. When a new operator is
4556 encountered of higher precedence than that at the top of the
4557 stack, it is pushed; its LHS is the top expression, and its RHS
4558 is everything parsed until it is popped. When a new operator is
4559 encountered with precedence less than or equal to that at the top
4560 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4561 by the result of the operation until the operator at the top of
4562 the stack has lower precedence than the new operator or there is
4563 only one element on the stack; then the top expression is the LHS
4564 of the new operator. In the case of logical AND and OR
4565 expressions, we also need to adjust skip_evaluation as
4566 appropriate when the operators are pushed and popped. */
4568 /* The precedence levels, where 0 is a dummy lowest level used for
4569 the bottom of the stack. */
4585 /* The expression at this stack level. */
4587 /* The precedence of the operator on its left, PREC_NONE at the
4588 bottom of the stack. */
4590 /* The operation on its left. */
4594 /* Location of the binary operator. */
4595 location_t binary_loc = UNKNOWN_LOCATION; /* Quiet warning. */
4598 switch (stack[sp].op) \
4600 case TRUTH_ANDIF_EXPR: \
4601 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4603 case TRUTH_ORIF_EXPR: \
4604 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4609 stack[sp - 1].expr \
4610 = default_function_array_conversion (stack[sp - 1].expr); \
4612 = default_function_array_conversion (stack[sp].expr); \
4613 stack[sp - 1].expr = parser_build_binary_op (binary_loc, \
4615 stack[sp - 1].expr, \
4619 gcc_assert (!after || c_dialect_objc ());
4620 stack[0].expr = c_parser_cast_expression (parser, after);
4621 stack[0].prec = PREC_NONE;
4626 enum tree_code ocode;
4629 switch (c_parser_peek_token (parser)->type)
4637 ocode = TRUNC_DIV_EXPR;
4641 ocode = TRUNC_MOD_EXPR;
4653 ocode = LSHIFT_EXPR;
4657 ocode = RSHIFT_EXPR;
4671 case CPP_GREATER_EQ:
4684 oprec = PREC_BITAND;
4685 ocode = BIT_AND_EXPR;
4688 oprec = PREC_BITXOR;
4689 ocode = BIT_XOR_EXPR;
4693 ocode = BIT_IOR_EXPR;
4696 oprec = PREC_LOGAND;
4697 ocode = TRUTH_ANDIF_EXPR;
4701 ocode = TRUTH_ORIF_EXPR;
4704 /* Not a binary operator, so end of the binary
4708 binary_loc = c_parser_peek_token (parser)->location;
4709 c_parser_consume_token (parser);
4710 while (oprec <= stack[sp].prec)
4714 case TRUTH_ANDIF_EXPR:
4716 = default_function_array_conversion (stack[sp].expr);
4717 stack[sp].expr.value = c_objc_common_truthvalue_conversion
4718 (binary_loc, default_conversion (stack[sp].expr.value));
4719 skip_evaluation += stack[sp].expr.value == truthvalue_false_node;
4721 case TRUTH_ORIF_EXPR:
4723 = default_function_array_conversion (stack[sp].expr);
4724 stack[sp].expr.value = c_objc_common_truthvalue_conversion
4725 (binary_loc, default_conversion (stack[sp].expr.value));
4726 skip_evaluation += stack[sp].expr.value == truthvalue_true_node;
4732 stack[sp].expr = c_parser_cast_expression (parser, NULL);
4733 stack[sp].prec = oprec;
4734 stack[sp].op = ocode;
4739 return stack[0].expr;
4743 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4744 NULL then it is an Objective-C message expression which is the
4745 primary-expression starting the expression as an initializer.
4749 ( type-name ) unary-expression
4752 static struct c_expr
4753 c_parser_cast_expression (c_parser *parser, struct c_expr *after)
4755 gcc_assert (!after || c_dialect_objc ());
4757 return c_parser_postfix_expression_after_primary (parser, *after);
4758 /* If the expression begins with a parenthesized type name, it may
4759 be either a cast or a compound literal; we need to see whether
4760 the next character is '{' to tell the difference. If not, it is
4761 an unary expression. */
4762 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4763 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4765 struct c_type_name *type_name;
4768 c_parser_consume_token (parser);
4769 type_name = c_parser_type_name (parser);
4770 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4771 if (type_name == NULL)
4773 ret.value = error_mark_node;
4774 ret.original_code = ERROR_MARK;
4778 /* Save casted types in the function's used types hash table. */
4779 used_types_insert (type_name->specs->type);
4781 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4782 return c_parser_postfix_expression_after_paren_type (parser,
4784 expr = c_parser_cast_expression (parser, NULL);
4785 expr = default_function_array_conversion (expr);
4786 ret.value = c_cast_expr (type_name, expr.value);
4787 ret.original_code = ERROR_MARK;
4791 return c_parser_unary_expression (parser);
4794 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4800 unary-operator cast-expression
4801 sizeof unary-expression
4802 sizeof ( type-name )
4804 unary-operator: one of
4810 __alignof__ unary-expression
4811 __alignof__ ( type-name )
4814 unary-operator: one of
4815 __extension__ __real__ __imag__
4817 In addition, the GNU syntax treats ++ and -- as unary operators, so
4818 they may be applied to cast expressions with errors for non-lvalues
4821 static struct c_expr
4822 c_parser_unary_expression (c_parser *parser)
4825 struct c_expr ret, op;
4826 location_t loc = c_parser_peek_token (parser)->location;
4827 switch (c_parser_peek_token (parser)->type)
4830 c_parser_consume_token (parser);
4831 op = c_parser_cast_expression (parser, NULL);
4832 op = default_function_array_conversion (op);
4833 return parser_build_unary_op (PREINCREMENT_EXPR, op, loc);
4834 case CPP_MINUS_MINUS:
4835 c_parser_consume_token (parser);
4836 op = c_parser_cast_expression (parser, NULL);
4837 op = default_function_array_conversion (op);
4838 return parser_build_unary_op (PREDECREMENT_EXPR, op, loc);
4840 c_parser_consume_token (parser);
4841 return parser_build_unary_op (ADDR_EXPR,
4842 c_parser_cast_expression (parser, NULL),
4845 c_parser_consume_token (parser);
4846 op = c_parser_cast_expression (parser, NULL);
4847 op = default_function_array_conversion (op);
4848 ret.value = build_indirect_ref (loc, op.value, "unary *");
4849 ret.original_code = ERROR_MARK;
4852 if (!c_dialect_objc () && !in_system_header)
4853 warning_at (c_parser_peek_token (parser)->location,
4855 "traditional C rejects the unary plus operator");
4856 c_parser_consume_token (parser);
4857 op = c_parser_cast_expression (parser, NULL);
4858 op = default_function_array_conversion (op);
4859 return parser_build_unary_op (CONVERT_EXPR, op, loc);
4861 c_parser_consume_token (parser);
4862 op = c_parser_cast_expression (parser, NULL);
4863 op = default_function_array_conversion (op);
4864 return parser_build_unary_op (NEGATE_EXPR, op, loc);
4866 c_parser_consume_token (parser);
4867 op = c_parser_cast_expression (parser, NULL);
4868 op = default_function_array_conversion (op);
4869 return parser_build_unary_op (BIT_NOT_EXPR, op, loc);
4871 c_parser_consume_token (parser);
4872 op = c_parser_cast_expression (parser, NULL);
4873 op = default_function_array_conversion (op);
4874 return parser_build_unary_op (TRUTH_NOT_EXPR, op, loc);
4876 /* Refer to the address of a label as a pointer. */
4877 c_parser_consume_token (parser);
4878 if (c_parser_next_token_is (parser, CPP_NAME))
4880 ret.value = finish_label_address_expr
4881 (c_parser_peek_token (parser)->value, loc);
4882 c_parser_consume_token (parser);
4886 c_parser_error (parser, "expected identifier");
4887 ret.value = error_mark_node;
4889 ret.original_code = ERROR_MARK;
4892 switch (c_parser_peek_token (parser)->keyword)
4895 return c_parser_sizeof_expression (parser);
4897 return c_parser_alignof_expression (parser);
4899 c_parser_consume_token (parser);
4900 ext = disable_extension_diagnostics ();
4901 ret = c_parser_cast_expression (parser, NULL);
4902 restore_extension_diagnostics (ext);
4905 c_parser_consume_token (parser);
4906 op = c_parser_cast_expression (parser, NULL);
4907 op = default_function_array_conversion (op);
4908 return parser_build_unary_op (REALPART_EXPR, op, loc);
4910 c_parser_consume_token (parser);
4911 op = c_parser_cast_expression (parser, NULL);
4912 op = default_function_array_conversion (op);
4913 return parser_build_unary_op (IMAGPART_EXPR, op, loc);
4915 return c_parser_postfix_expression (parser);
4918 return c_parser_postfix_expression (parser);
4922 /* Parse a sizeof expression. */
4924 static struct c_expr
4925 c_parser_sizeof_expression (c_parser *parser)
4928 location_t expr_loc;
4929 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SIZEOF));
4930 c_parser_consume_token (parser);
4933 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4934 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4936 /* Either sizeof ( type-name ) or sizeof unary-expression
4937 starting with a compound literal. */
4938 struct c_type_name *type_name;
4939 c_parser_consume_token (parser);
4940 expr_loc = c_parser_peek_token (parser)->location;
4941 type_name = c_parser_type_name (parser);
4942 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4943 if (type_name == NULL)
4948 ret.value = error_mark_node;
4949 ret.original_code = ERROR_MARK;
4952 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4954 expr = c_parser_postfix_expression_after_paren_type (parser,
4958 /* sizeof ( type-name ). */
4961 return c_expr_sizeof_type (type_name);
4965 expr_loc = c_parser_peek_token (parser)->location;
4966 expr = c_parser_unary_expression (parser);
4970 if (TREE_CODE (expr.value) == COMPONENT_REF
4971 && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1)))
4972 error_at (expr_loc, "%<sizeof%> applied to a bit-field");
4973 return c_expr_sizeof_expr (expr);
4977 /* Parse an alignof expression. */
4979 static struct c_expr
4980 c_parser_alignof_expression (c_parser *parser)
4983 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF));
4984 c_parser_consume_token (parser);
4987 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4988 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4990 /* Either __alignof__ ( type-name ) or __alignof__
4991 unary-expression starting with a compound literal. */
4992 struct c_type_name *type_name;
4994 c_parser_consume_token (parser);
4995 type_name = c_parser_type_name (parser);
4996 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4997 if (type_name == NULL)
5002 ret.value = error_mark_node;
5003 ret.original_code = ERROR_MARK;
5006 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5008 expr = c_parser_postfix_expression_after_paren_type (parser,
5012 /* alignof ( type-name ). */
5015 ret.value = c_alignof (groktypename (type_name));
5016 ret.original_code = ERROR_MARK;
5022 expr = c_parser_unary_expression (parser);
5026 ret.value = c_alignof_expr (expr.value);
5027 ret.original_code = ERROR_MARK;
5032 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
5036 postfix-expression [ expression ]
5037 postfix-expression ( argument-expression-list[opt] )
5038 postfix-expression . identifier
5039 postfix-expression -> identifier
5040 postfix-expression ++
5041 postfix-expression --
5042 ( type-name ) { initializer-list }
5043 ( type-name ) { initializer-list , }
5045 argument-expression-list:
5047 argument-expression-list , argument-expression
5059 (treated as a keyword in GNU C)
5062 ( compound-statement )
5063 __builtin_va_arg ( assignment-expression , type-name )
5064 __builtin_offsetof ( type-name , offsetof-member-designator )
5065 __builtin_choose_expr ( assignment-expression ,
5066 assignment-expression ,
5067 assignment-expression )
5068 __builtin_types_compatible_p ( type-name , type-name )
5070 offsetof-member-designator:
5072 offsetof-member-designator . identifier
5073 offsetof-member-designator [ expression ]
5078 [ objc-receiver objc-message-args ]
5079 @selector ( objc-selector-arg )
5080 @protocol ( identifier )
5081 @encode ( type-name )
5085 static struct c_expr
5086 c_parser_postfix_expression (c_parser *parser)
5088 struct c_expr expr, e1, e2, e3;
5089 struct c_type_name *t1, *t2;
5091 switch (c_parser_peek_token (parser)->type)
5094 expr.value = c_parser_peek_token (parser)->value;
5095 expr.original_code = ERROR_MARK;
5096 loc = c_parser_peek_token (parser)->location;
5097 c_parser_consume_token (parser);
5098 if (TREE_CODE (expr.value) == FIXED_CST
5099 && !targetm.fixed_point_supported_p ())
5101 error_at (loc, "fixed-point types not supported for this target");
5102 expr.value = error_mark_node;
5109 expr.value = c_parser_peek_token (parser)->value;
5110 expr.original_code = ERROR_MARK;
5111 c_parser_consume_token (parser);
5117 expr.value = c_parser_peek_token (parser)->value;
5118 expr.original_code = STRING_CST;
5119 c_parser_consume_token (parser);
5121 case CPP_OBJC_STRING:
5122 gcc_assert (c_dialect_objc ());
5124 = objc_build_string_object (c_parser_peek_token (parser)->value);
5125 expr.original_code = ERROR_MARK;
5126 c_parser_consume_token (parser);
5129 if (c_parser_peek_token (parser)->id_kind != C_ID_ID)
5131 c_parser_error (parser, "expected expression");
5132 expr.value = error_mark_node;
5133 expr.original_code = ERROR_MARK;
5137 tree id = c_parser_peek_token (parser)->value;
5138 location_t loc = c_parser_peek_token (parser)->location;
5139 c_parser_consume_token (parser);
5140 expr.value = build_external_ref (id,
5141 (c_parser_peek_token (parser)->type
5142 == CPP_OPEN_PAREN), loc);
5143 expr.original_code = ERROR_MARK;
5146 case CPP_OPEN_PAREN:
5147 /* A parenthesized expression, statement expression or compound
5149 if (c_parser_peek_2nd_token (parser)->type == CPP_OPEN_BRACE)
5151 /* A statement expression. */
5153 location_t here = c_parser_peek_token (parser)->location;
5154 c_parser_consume_token (parser);
5155 c_parser_consume_token (parser);
5156 if (cur_stmt_list == NULL)
5158 error_at (here, "braced-group within expression allowed "
5159 "only inside a function");
5160 parser->error = true;
5161 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
5162 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5163 expr.value = error_mark_node;
5164 expr.original_code = ERROR_MARK;
5167 stmt = c_begin_stmt_expr ();
5168 c_parser_compound_statement_nostart (parser);
5169 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5171 pedwarn (here, OPT_pedantic,
5172 "ISO C forbids braced-groups within expressions");
5173 expr.value = c_finish_stmt_expr (stmt);
5174 expr.original_code = ERROR_MARK;
5176 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser)))
5178 /* A compound literal. ??? Can we actually get here rather
5179 than going directly to
5180 c_parser_postfix_expression_after_paren_type from
5182 struct c_type_name *type_name;
5183 c_parser_consume_token (parser);
5184 type_name = c_parser_type_name (parser);
5185 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5187 if (type_name == NULL)
5189 expr.value = error_mark_node;
5190 expr.original_code = ERROR_MARK;
5193 expr = c_parser_postfix_expression_after_paren_type (parser,
5198 /* A parenthesized expression. */
5199 c_parser_consume_token (parser);
5200 expr = c_parser_expression (parser);
5201 if (TREE_CODE (expr.value) == MODIFY_EXPR)
5202 TREE_NO_WARNING (expr.value) = 1;
5203 expr.original_code = ERROR_MARK;
5204 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5209 switch (c_parser_peek_token (parser)->keyword)
5211 case RID_FUNCTION_NAME:
5212 case RID_PRETTY_FUNCTION_NAME:
5213 case RID_C99_FUNCTION_NAME:
5214 expr.value = fname_decl (c_parser_peek_token (parser)->location,
5215 c_parser_peek_token (parser)->keyword,
5216 c_parser_peek_token (parser)->value);
5217 expr.original_code = ERROR_MARK;
5218 c_parser_consume_token (parser);
5221 c_parser_consume_token (parser);
5222 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5224 expr.value = error_mark_node;
5225 expr.original_code = ERROR_MARK;
5228 e1 = c_parser_expr_no_commas (parser, NULL);
5229 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5231 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5232 expr.value = error_mark_node;
5233 expr.original_code = ERROR_MARK;
5236 t1 = c_parser_type_name (parser);
5237 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5241 expr.value = error_mark_node;
5242 expr.original_code = ERROR_MARK;
5246 expr.value = build_va_arg (e1.value, groktypename (t1));
5247 expr.original_code = ERROR_MARK;
5251 c_parser_consume_token (parser);
5252 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5254 expr.value = error_mark_node;
5255 expr.original_code = ERROR_MARK;
5258 t1 = c_parser_type_name (parser);
5261 expr.value = error_mark_node;
5262 expr.original_code = ERROR_MARK;
5265 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5267 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5268 expr.value = error_mark_node;
5269 expr.original_code = ERROR_MARK;
5273 tree type = groktypename (t1);
5275 if (type == error_mark_node)
5276 offsetof_ref = error_mark_node;
5278 offsetof_ref = build1 (INDIRECT_REF, type, null_pointer_node);
5279 /* Parse the second argument to __builtin_offsetof. We
5280 must have one identifier, and beyond that we want to
5281 accept sub structure and sub array references. */
5282 if (c_parser_next_token_is (parser, CPP_NAME))
5284 offsetof_ref = build_component_ref
5285 (offsetof_ref, c_parser_peek_token (parser)->value);
5286 c_parser_consume_token (parser);
5287 while (c_parser_next_token_is (parser, CPP_DOT)
5288 || c_parser_next_token_is (parser,
5290 || c_parser_next_token_is (parser,
5293 if (c_parser_next_token_is (parser, CPP_DEREF))
5295 loc = c_parser_peek_token (parser)->location;
5296 offsetof_ref = build_array_ref (offsetof_ref,
5301 else if (c_parser_next_token_is (parser, CPP_DOT))
5304 c_parser_consume_token (parser);
5305 if (c_parser_next_token_is_not (parser,
5308 c_parser_error (parser, "expected identifier");
5311 offsetof_ref = build_component_ref
5313 c_parser_peek_token (parser)->value);
5314 c_parser_consume_token (parser);
5319 loc = c_parser_peek_token (parser)->location;
5320 c_parser_consume_token (parser);
5321 idx = c_parser_expression (parser).value;
5322 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5324 offsetof_ref = build_array_ref (offsetof_ref, idx, loc);
5329 c_parser_error (parser, "expected identifier");
5330 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5332 expr.value = fold_offsetof (offsetof_ref, NULL_TREE);
5333 expr.original_code = ERROR_MARK;
5336 case RID_CHOOSE_EXPR:
5337 c_parser_consume_token (parser);
5338 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5340 expr.value = error_mark_node;
5341 expr.original_code = ERROR_MARK;
5344 loc = c_parser_peek_token (parser)->location;
5345 e1 = c_parser_expr_no_commas (parser, NULL);
5346 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5348 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5349 expr.value = error_mark_node;
5350 expr.original_code = ERROR_MARK;
5353 e2 = c_parser_expr_no_commas (parser, NULL);
5354 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5356 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5357 expr.value = error_mark_node;
5358 expr.original_code = ERROR_MARK;
5361 e3 = c_parser_expr_no_commas (parser, NULL);
5362 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5367 c = fold (e1.value);
5368 if (TREE_CODE (c) != INTEGER_CST)
5370 "first argument to %<__builtin_choose_expr%> not"
5372 expr = integer_zerop (c) ? e3 : e2;
5375 case RID_TYPES_COMPATIBLE_P:
5376 c_parser_consume_token (parser);
5377 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5379 expr.value = error_mark_node;
5380 expr.original_code = ERROR_MARK;
5383 t1 = c_parser_type_name (parser);
5386 expr.value = error_mark_node;
5387 expr.original_code = ERROR_MARK;
5390 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5392 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5393 expr.value = error_mark_node;
5394 expr.original_code = ERROR_MARK;
5397 t2 = c_parser_type_name (parser);
5400 expr.value = error_mark_node;
5401 expr.original_code = ERROR_MARK;
5404 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5409 e1 = TYPE_MAIN_VARIANT (groktypename (t1));
5410 e2 = TYPE_MAIN_VARIANT (groktypename (t2));
5412 expr.value = comptypes (e1, e2)
5413 ? build_int_cst (NULL_TREE, 1)
5414 : build_int_cst (NULL_TREE, 0);
5415 expr.original_code = ERROR_MARK;
5418 case RID_AT_SELECTOR:
5419 gcc_assert (c_dialect_objc ());
5420 c_parser_consume_token (parser);
5421 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5423 expr.value = error_mark_node;
5424 expr.original_code = ERROR_MARK;
5428 tree sel = c_parser_objc_selector_arg (parser);
5429 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5431 expr.value = objc_build_selector_expr (sel);
5432 expr.original_code = ERROR_MARK;
5435 case RID_AT_PROTOCOL:
5436 gcc_assert (c_dialect_objc ());
5437 c_parser_consume_token (parser);
5438 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5440 expr.value = error_mark_node;
5441 expr.original_code = ERROR_MARK;
5444 if (c_parser_next_token_is_not (parser, CPP_NAME))
5446 c_parser_error (parser, "expected identifier");
5447 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5448 expr.value = error_mark_node;
5449 expr.original_code = ERROR_MARK;
5453 tree id = c_parser_peek_token (parser)->value;
5454 c_parser_consume_token (parser);
5455 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5457 expr.value = objc_build_protocol_expr (id);
5458 expr.original_code = ERROR_MARK;
5462 /* Extension to support C-structures in the archiver. */
5463 gcc_assert (c_dialect_objc ());
5464 c_parser_consume_token (parser);
5465 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5467 expr.value = error_mark_node;
5468 expr.original_code = ERROR_MARK;
5471 t1 = c_parser_type_name (parser);
5474 expr.value = error_mark_node;
5475 expr.original_code = ERROR_MARK;
5476 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5479 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5482 tree type = groktypename (t1);
5483 expr.value = objc_build_encode_expr (type);
5484 expr.original_code = ERROR_MARK;
5488 c_parser_error (parser, "expected expression");
5489 expr.value = error_mark_node;
5490 expr.original_code = ERROR_MARK;
5494 case CPP_OPEN_SQUARE:
5495 if (c_dialect_objc ())
5497 tree receiver, args;
5498 c_parser_consume_token (parser);
5499 receiver = c_parser_objc_receiver (parser);
5500 args = c_parser_objc_message_args (parser);
5501 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5503 expr.value = objc_build_message_expr (build_tree_list (receiver,
5505 expr.original_code = ERROR_MARK;
5508 /* Else fall through to report error. */
5510 c_parser_error (parser, "expected expression");
5511 expr.value = error_mark_node;
5512 expr.original_code = ERROR_MARK;
5515 return c_parser_postfix_expression_after_primary (parser, expr);
5518 /* Parse a postfix expression after a parenthesized type name: the
5519 brace-enclosed initializer of a compound literal, possibly followed
5520 by some postfix operators. This is separate because it is not
5521 possible to tell until after the type name whether a cast
5522 expression has a cast or a compound literal, or whether the operand
5523 of sizeof is a parenthesized type name or starts with a compound
5526 static struct c_expr
5527 c_parser_postfix_expression_after_paren_type (c_parser *parser,
5528 struct c_type_name *type_name)
5533 location_t start_loc;
5534 start_init (NULL_TREE, NULL, 0);
5535 type = groktypename (type_name);
5536 start_loc = c_parser_peek_token (parser)->location;
5537 if (type != error_mark_node && C_TYPE_VARIABLE_SIZE (type))
5539 error_at (start_loc, "compound literal has variable size");
5540 type = error_mark_node;
5542 init = c_parser_braced_init (parser, type, false);
5544 maybe_warn_string_init (type, init);
5547 pedwarn (start_loc, OPT_pedantic, "ISO C90 forbids compound literals");
5548 expr.value = build_compound_literal (type, init.value);
5549 expr.original_code = ERROR_MARK;
5550 return c_parser_postfix_expression_after_primary (parser, expr);
5553 /* Parse a postfix expression after the initial primary or compound
5554 literal; that is, parse a series of postfix operators. */
5556 static struct c_expr
5557 c_parser_postfix_expression_after_primary (c_parser *parser,
5560 tree ident, idx, exprlist;
5561 location_t loc = c_parser_peek_token (parser)->location;
5564 switch (c_parser_peek_token (parser)->type)
5566 case CPP_OPEN_SQUARE:
5567 /* Array reference. */
5568 loc = c_parser_peek_token (parser)->location;
5569 c_parser_consume_token (parser);
5570 idx = c_parser_expression (parser).value;
5571 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5573 expr.value = build_array_ref (expr.value, idx, loc);
5574 expr.original_code = ERROR_MARK;
5576 case CPP_OPEN_PAREN:
5577 /* Function call. */
5578 c_parser_consume_token (parser);
5579 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
5580 exprlist = NULL_TREE;
5582 exprlist = c_parser_expr_list (parser, true);
5583 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5585 expr.value = build_function_call (expr.value, exprlist);
5586 expr.original_code = ERROR_MARK;
5587 if (warn_disallowed_functions)
5588 warn_if_disallowed_function_p (expr.value);
5591 /* Structure element reference. */
5592 c_parser_consume_token (parser);
5593 expr = default_function_array_conversion (expr);
5594 if (c_parser_next_token_is (parser, CPP_NAME))
5595 ident = c_parser_peek_token (parser)->value;
5598 c_parser_error (parser, "expected identifier");
5599 expr.value = error_mark_node;
5600 expr.original_code = ERROR_MARK;
5603 c_parser_consume_token (parser);
5604 expr.value = build_component_ref (expr.value, ident);
5605 expr.original_code = ERROR_MARK;
5608 /* Structure element reference. */
5609 c_parser_consume_token (parser);
5610 expr = default_function_array_conversion (expr);
5611 if (c_parser_next_token_is (parser, CPP_NAME))
5612 ident = c_parser_peek_token (parser)->value;
5615 c_parser_error (parser, "expected identifier");
5616 expr.value = error_mark_node;
5617 expr.original_code = ERROR_MARK;
5620 c_parser_consume_token (parser);
5621 expr.value = build_component_ref (build_indirect_ref (loc,
5625 expr.original_code = ERROR_MARK;
5628 /* Postincrement. */
5629 c_parser_consume_token (parser);
5630 expr = default_function_array_conversion (expr);
5631 expr.value = build_unary_op (loc,
5632 POSTINCREMENT_EXPR, expr.value, 0);
5633 expr.original_code = ERROR_MARK;
5635 case CPP_MINUS_MINUS:
5636 /* Postdecrement. */
5637 c_parser_consume_token (parser);
5638 expr = default_function_array_conversion (expr);
5639 expr.value = build_unary_op (loc,
5640 POSTDECREMENT_EXPR, expr.value, 0);
5641 expr.original_code = ERROR_MARK;
5649 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5652 assignment-expression
5653 expression , assignment-expression
5656 static struct c_expr
5657 c_parser_expression (c_parser *parser)
5660 expr = c_parser_expr_no_commas (parser, NULL);
5661 while (c_parser_next_token_is (parser, CPP_COMMA))
5664 c_parser_consume_token (parser);
5665 next = c_parser_expr_no_commas (parser, NULL);
5666 next = default_function_array_conversion (next);
5667 expr.value = build_compound_expr (expr.value, next.value);
5668 expr.original_code = COMPOUND_EXPR;
5673 /* Parse an expression and convert functions or arrays to
5676 static struct c_expr
5677 c_parser_expression_conv (c_parser *parser)
5680 expr = c_parser_expression (parser);
5681 expr = default_function_array_conversion (expr);
5685 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5686 functions and arrays to pointers.
5689 assignment-expression
5690 nonempty-expr-list , assignment-expression
5694 c_parser_expr_list (c_parser *parser, bool convert_p)
5698 expr = c_parser_expr_no_commas (parser, NULL);
5700 expr = default_function_array_conversion (expr);
5701 ret = cur = build_tree_list (NULL_TREE, expr.value);
5702 while (c_parser_next_token_is (parser, CPP_COMMA))
5704 c_parser_consume_token (parser);
5705 expr = c_parser_expr_no_commas (parser, NULL);
5707 expr = default_function_array_conversion (expr);
5708 cur = TREE_CHAIN (cur) = build_tree_list (NULL_TREE, expr.value);
5714 /* Parse Objective-C-specific constructs. */
5716 /* Parse an objc-class-definition.
5718 objc-class-definition:
5719 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5720 objc-class-instance-variables[opt] objc-methodprotolist @end
5721 @implementation identifier objc-superclass[opt]
5722 objc-class-instance-variables[opt]
5723 @interface identifier ( identifier ) objc-protocol-refs[opt]
5724 objc-methodprotolist @end
5725 @implementation identifier ( identifier )
5730 "@interface identifier (" must start "@interface identifier (
5731 identifier ) ...": objc-methodprotolist in the first production may
5732 not start with a parenthesized identifier as a declarator of a data
5733 definition with no declaration specifiers if the objc-superclass,
5734 objc-protocol-refs and objc-class-instance-variables are omitted. */
5737 c_parser_objc_class_definition (c_parser *parser)
5742 if (c_parser_next_token_is_keyword (parser, RID_AT_INTERFACE))
5744 else if (c_parser_next_token_is_keyword (parser, RID_AT_IMPLEMENTATION))
5748 c_parser_consume_token (parser);
5749 if (c_parser_next_token_is_not (parser, CPP_NAME))
5751 c_parser_error (parser, "expected identifier");
5754 id1 = c_parser_peek_token (parser)->value;
5755 c_parser_consume_token (parser);
5756 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
5759 tree proto = NULL_TREE;
5760 c_parser_consume_token (parser);
5761 if (c_parser_next_token_is_not (parser, CPP_NAME))
5763 c_parser_error (parser, "expected identifier");
5764 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5767 id2 = c_parser_peek_token (parser)->value;
5768 c_parser_consume_token (parser);
5769 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
5772 objc_start_category_implementation (id1, id2);
5775 if (c_parser_next_token_is (parser, CPP_LESS))
5776 proto = c_parser_objc_protocol_refs (parser);
5777 objc_start_category_interface (id1, id2, proto);
5778 c_parser_objc_methodprotolist (parser);
5779 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5780 objc_finish_interface ();
5783 if (c_parser_next_token_is (parser, CPP_COLON))
5785 c_parser_consume_token (parser);
5786 if (c_parser_next_token_is_not (parser, CPP_NAME))
5788 c_parser_error (parser, "expected identifier");
5791 superclass = c_parser_peek_token (parser)->value;
5792 c_parser_consume_token (parser);
5795 superclass = NULL_TREE;
5798 tree proto = NULL_TREE;
5799 if (c_parser_next_token_is (parser, CPP_LESS))
5800 proto = c_parser_objc_protocol_refs (parser);
5801 objc_start_class_interface (id1, superclass, proto);
5804 objc_start_class_implementation (id1, superclass);
5805 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5806 c_parser_objc_class_instance_variables (parser);
5809 objc_continue_interface ();
5810 c_parser_objc_methodprotolist (parser);
5811 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5812 objc_finish_interface ();
5816 objc_continue_implementation ();
5821 /* Parse objc-class-instance-variables.
5823 objc-class-instance-variables:
5824 { objc-instance-variable-decl-list[opt] }
5826 objc-instance-variable-decl-list:
5827 objc-visibility-spec
5828 objc-instance-variable-decl ;
5830 objc-instance-variable-decl-list objc-visibility-spec
5831 objc-instance-variable-decl-list objc-instance-variable-decl ;
5832 objc-instance-variable-decl-list ;
5834 objc-visibility-spec:
5839 objc-instance-variable-decl:
5844 c_parser_objc_class_instance_variables (c_parser *parser)
5846 gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE));
5847 c_parser_consume_token (parser);
5848 while (c_parser_next_token_is_not (parser, CPP_EOF))
5851 /* Parse any stray semicolon. */
5852 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
5854 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
5855 "extra semicolon in struct or union specified");
5856 c_parser_consume_token (parser);
5859 /* Stop if at the end of the instance variables. */
5860 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
5862 c_parser_consume_token (parser);
5865 /* Parse any objc-visibility-spec. */
5866 if (c_parser_next_token_is_keyword (parser, RID_PRIVATE))
5868 c_parser_consume_token (parser);
5869 objc_set_visibility (2);
5872 else if (c_parser_next_token_is_keyword (parser, RID_PROTECTED))
5874 c_parser_consume_token (parser);
5875 objc_set_visibility (0);
5878 else if (c_parser_next_token_is_keyword (parser, RID_PUBLIC))
5880 c_parser_consume_token (parser);
5881 objc_set_visibility (1);
5884 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
5886 c_parser_pragma (parser, pragma_external);
5890 /* Parse some comma-separated declarations. */
5891 decls = c_parser_struct_declaration (parser);
5893 /* Comma-separated instance variables are chained together in
5894 reverse order; add them one by one. */
5895 tree ivar = nreverse (decls);
5896 for (; ivar; ivar = TREE_CHAIN (ivar))
5897 objc_add_instance_variable (copy_node (ivar));
5899 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5903 /* Parse an objc-class-declaration.
5905 objc-class-declaration:
5906 @class identifier-list ;
5910 c_parser_objc_class_declaration (c_parser *parser)
5912 tree list = NULL_TREE;
5913 gcc_assert (c_parser_next_token_is_keyword (parser, RID_CLASS));
5914 c_parser_consume_token (parser);
5915 /* Any identifiers, including those declared as type names, are OK
5920 if (c_parser_next_token_is_not (parser, CPP_NAME))
5922 c_parser_error (parser, "expected identifier");
5925 id = c_parser_peek_token (parser)->value;
5926 list = chainon (list, build_tree_list (NULL_TREE, id));
5927 c_parser_consume_token (parser);
5928 if (c_parser_next_token_is (parser, CPP_COMMA))
5929 c_parser_consume_token (parser);
5933 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5934 objc_declare_class (list);
5937 /* Parse an objc-alias-declaration.
5939 objc-alias-declaration:
5940 @compatibility_alias identifier identifier ;
5944 c_parser_objc_alias_declaration (c_parser *parser)
5947 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_ALIAS));
5948 c_parser_consume_token (parser);
5949 if (c_parser_next_token_is_not (parser, CPP_NAME))
5951 c_parser_error (parser, "expected identifier");
5952 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
5955 id1 = c_parser_peek_token (parser)->value;
5956 c_parser_consume_token (parser);
5957 if (c_parser_next_token_is_not (parser, CPP_NAME))
5959 c_parser_error (parser, "expected identifier");
5960 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
5963 id2 = c_parser_peek_token (parser)->value;
5964 c_parser_consume_token (parser);
5965 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5966 objc_declare_alias (id1, id2);
5969 /* Parse an objc-protocol-definition.
5971 objc-protocol-definition:
5972 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
5973 @protocol identifier-list ;
5975 "@protocol identifier ;" should be resolved as "@protocol
5976 identifier-list ;": objc-methodprotolist may not start with a
5977 semicolon in the first alternative if objc-protocol-refs are
5981 c_parser_objc_protocol_definition (c_parser *parser)
5983 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROTOCOL));
5984 c_parser_consume_token (parser);
5985 if (c_parser_next_token_is_not (parser, CPP_NAME))
5987 c_parser_error (parser, "expected identifier");
5990 if (c_parser_peek_2nd_token (parser)->type == CPP_COMMA
5991 || c_parser_peek_2nd_token (parser)->type == CPP_SEMICOLON)
5993 tree list = NULL_TREE;
5994 /* Any identifiers, including those declared as type names, are
5999 if (c_parser_next_token_is_not (parser, CPP_NAME))
6001 c_parser_error (parser, "expected identifier");
6004 id = c_parser_peek_token (parser)->value;
6005 list = chainon (list, build_tree_list (NULL_TREE, id));
6006 c_parser_consume_token (parser);
6007 if (c_parser_next_token_is (parser, CPP_COMMA))
6008 c_parser_consume_token (parser);
6012 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
6013 objc_declare_protocols (list);
6017 tree id = c_parser_peek_token (parser)->value;
6018 tree proto = NULL_TREE;
6019 c_parser_consume_token (parser);
6020 if (c_parser_next_token_is (parser, CPP_LESS))
6021 proto = c_parser_objc_protocol_refs (parser);
6022 parser->objc_pq_context = true;
6023 objc_start_protocol (id, proto);
6024 c_parser_objc_methodprotolist (parser);
6025 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
6026 parser->objc_pq_context = false;
6027 objc_finish_interface ();
6031 /* Parse an objc-method-type.
6038 static enum tree_code
6039 c_parser_objc_method_type (c_parser *parser)
6041 switch (c_parser_peek_token (parser)->type)
6044 c_parser_consume_token (parser);
6047 c_parser_consume_token (parser);
6054 /* Parse an objc-method-definition.
6056 objc-method-definition:
6057 objc-method-type objc-method-decl ;[opt] compound-statement
6061 c_parser_objc_method_definition (c_parser *parser)
6063 enum tree_code type = c_parser_objc_method_type (parser);
6065 objc_set_method_type (type);
6066 parser->objc_pq_context = true;
6067 decl = c_parser_objc_method_decl (parser);
6068 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
6070 c_parser_consume_token (parser);
6071 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
6072 "extra semicolon in method definition specified");
6074 if (!c_parser_next_token_is (parser, CPP_OPEN_BRACE))
6076 c_parser_error (parser, "expected %<{%>");
6079 parser->objc_pq_context = false;
6080 objc_start_method_definition (decl);
6081 add_stmt (c_parser_compound_statement (parser));
6082 objc_finish_method_definition (current_function_decl);
6085 /* Parse an objc-methodprotolist.
6087 objc-methodprotolist:
6089 objc-methodprotolist objc-methodproto
6090 objc-methodprotolist declaration
6091 objc-methodprotolist ;
6093 The declaration is a data definition, which may be missing
6094 declaration specifiers under the same rules and diagnostics as
6095 other data definitions outside functions, and the stray semicolon
6096 is diagnosed the same way as a stray semicolon outside a
6100 c_parser_objc_methodprotolist (c_parser *parser)
6104 /* The list is terminated by @end. */
6105 switch (c_parser_peek_token (parser)->type)
6108 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
6109 "ISO C does not allow extra %<;%> outside of a function");
6110 c_parser_consume_token (parser);
6114 c_parser_objc_methodproto (parser);
6117 c_parser_pragma (parser, pragma_external);
6122 if (c_parser_next_token_is_keyword (parser, RID_AT_END))
6124 c_parser_declaration_or_fndef (parser, false, true, false, true);
6130 /* Parse an objc-methodproto.
6133 objc-method-type objc-method-decl ;
6137 c_parser_objc_methodproto (c_parser *parser)
6139 enum tree_code type = c_parser_objc_method_type (parser);
6141 objc_set_method_type (type);
6142 /* Remember protocol qualifiers in prototypes. */
6143 parser->objc_pq_context = true;
6144 decl = c_parser_objc_method_decl (parser);
6145 /* Forget protocol qualifiers here. */
6146 parser->objc_pq_context = false;
6147 objc_add_method_declaration (decl);
6148 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
6151 /* Parse an objc-method-decl.
6154 ( objc-type-name ) objc-selector
6156 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6157 objc-keyword-selector objc-optparmlist
6159 objc-keyword-selector:
6161 objc-keyword-selector objc-keyword-decl
6164 objc-selector : ( objc-type-name ) identifier
6165 objc-selector : identifier
6166 : ( objc-type-name ) identifier
6170 objc-optparms objc-optellipsis
6174 objc-opt-parms , parameter-declaration
6182 c_parser_objc_method_decl (c_parser *parser)
6184 tree type = NULL_TREE;
6186 tree parms = NULL_TREE;
6187 bool ellipsis = false;
6189 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6191 c_parser_consume_token (parser);
6192 type = c_parser_objc_type_name (parser);
6193 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6195 sel = c_parser_objc_selector (parser);
6196 /* If there is no selector, or a colon follows, we have an
6197 objc-keyword-selector. If there is a selector, and a colon does
6198 not follow, that selector ends the objc-method-decl. */
6199 if (!sel || c_parser_next_token_is (parser, CPP_COLON))
6202 tree list = NULL_TREE;
6205 tree atype = NULL_TREE, id, keyworddecl;
6206 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6208 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6210 c_parser_consume_token (parser);
6211 atype = c_parser_objc_type_name (parser);
6212 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6215 if (c_parser_next_token_is_not (parser, CPP_NAME))
6217 c_parser_error (parser, "expected identifier");
6218 return error_mark_node;
6220 id = c_parser_peek_token (parser)->value;
6221 c_parser_consume_token (parser);
6222 keyworddecl = objc_build_keyword_decl (tsel, atype, id);
6223 list = chainon (list, keyworddecl);
6224 tsel = c_parser_objc_selector (parser);
6225 if (!tsel && c_parser_next_token_is_not (parser, CPP_COLON))
6228 /* Parse the optional parameter list. Optional Objective-C
6229 method parameters follow the C syntax, and may include '...'
6230 to denote a variable number of arguments. */
6231 parms = make_node (TREE_LIST);
6232 while (c_parser_next_token_is (parser, CPP_COMMA))
6234 struct c_parm *parm;
6235 c_parser_consume_token (parser);
6236 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
6239 c_parser_consume_token (parser);
6242 parm = c_parser_parameter_declaration (parser, NULL_TREE);
6245 parms = chainon (parms,
6246 build_tree_list (NULL_TREE, grokparm (parm)));
6250 return objc_build_method_signature (type, sel, parms, ellipsis);
6253 /* Parse an objc-type-name.
6256 objc-type-qualifiers[opt] type-name
6257 objc-type-qualifiers[opt]
6259 objc-type-qualifiers:
6261 objc-type-qualifiers objc-type-qualifier
6263 objc-type-qualifier: one of
6264 in out inout bycopy byref oneway
6268 c_parser_objc_type_name (c_parser *parser)
6270 tree quals = NULL_TREE;
6271 struct c_type_name *type_name = NULL;
6272 tree type = NULL_TREE;
6275 c_token *token = c_parser_peek_token (parser);
6276 if (token->type == CPP_KEYWORD
6277 && (token->keyword == RID_IN
6278 || token->keyword == RID_OUT
6279 || token->keyword == RID_INOUT
6280 || token->keyword == RID_BYCOPY
6281 || token->keyword == RID_BYREF
6282 || token->keyword == RID_ONEWAY))
6284 quals = chainon (quals, build_tree_list (NULL_TREE, token->value));
6285 c_parser_consume_token (parser);
6290 if (c_parser_next_token_starts_typename (parser))
6291 type_name = c_parser_type_name (parser);
6293 type = groktypename (type_name);
6294 return build_tree_list (quals, type);
6297 /* Parse objc-protocol-refs.
6304 c_parser_objc_protocol_refs (c_parser *parser)
6306 tree list = NULL_TREE;
6307 gcc_assert (c_parser_next_token_is (parser, CPP_LESS));
6308 c_parser_consume_token (parser);
6309 /* Any identifiers, including those declared as type names, are OK
6314 if (c_parser_next_token_is_not (parser, CPP_NAME))
6316 c_parser_error (parser, "expected identifier");
6319 id = c_parser_peek_token (parser)->value;
6320 list = chainon (list, build_tree_list (NULL_TREE, id));
6321 c_parser_consume_token (parser);
6322 if (c_parser_next_token_is (parser, CPP_COMMA))
6323 c_parser_consume_token (parser);
6327 c_parser_require (parser, CPP_GREATER, "expected %<>%>");
6331 /* Parse an objc-try-catch-statement.
6333 objc-try-catch-statement:
6334 @try compound-statement objc-catch-list[opt]
6335 @try compound-statement objc-catch-list[opt] @finally compound-statement
6338 @catch ( parameter-declaration ) compound-statement
6339 objc-catch-list @catch ( parameter-declaration ) compound-statement
6343 c_parser_objc_try_catch_statement (c_parser *parser)
6347 gcc_assert (c_parser_next_token_is_keyword (parser, RID_TRY));
6348 c_parser_consume_token (parser);
6349 loc = c_parser_peek_token (parser)->location;
6350 stmt = c_parser_compound_statement (parser);
6351 objc_begin_try_stmt (loc, stmt);
6352 while (c_parser_next_token_is_keyword (parser, RID_CATCH))
6354 struct c_parm *parm;
6355 c_parser_consume_token (parser);
6356 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6358 parm = c_parser_parameter_declaration (parser, NULL_TREE);
6361 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6364 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6365 objc_begin_catch_clause (grokparm (parm));
6366 if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
6367 c_parser_compound_statement_nostart (parser);
6368 objc_finish_catch_clause ();
6370 if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY))
6374 c_parser_consume_token (parser);
6375 finloc = c_parser_peek_token (parser)->location;
6376 finstmt = c_parser_compound_statement (parser);
6377 objc_build_finally_clause (finloc, finstmt);
6379 objc_finish_try_stmt ();
6382 /* Parse an objc-synchronized-statement.
6384 objc-synchronized-statement:
6385 @synchronized ( expression ) compound-statement
6389 c_parser_objc_synchronized_statement (c_parser *parser)
6393 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED));
6394 c_parser_consume_token (parser);
6395 loc = c_parser_peek_token (parser)->location;
6396 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6398 expr = c_parser_expression (parser).value;
6399 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6402 expr = error_mark_node;
6403 stmt = c_parser_compound_statement (parser);
6404 objc_build_synchronized (loc, expr, stmt);
6407 /* Parse an objc-selector; return NULL_TREE without an error if the
6408 next token is not an objc-selector.
6413 enum struct union if else while do for switch case default
6414 break continue return goto asm sizeof typeof __alignof
6415 unsigned long const short volatile signed restrict _Complex
6416 in out inout bycopy byref oneway int char float double void _Bool
6418 ??? Why this selection of keywords but not, for example, storage
6419 class specifiers? */
6422 c_parser_objc_selector (c_parser *parser)
6424 c_token *token = c_parser_peek_token (parser);
6425 tree value = token->value;
6426 if (token->type == CPP_NAME)
6428 c_parser_consume_token (parser);
6431 if (token->type != CPP_KEYWORD)
6433 switch (token->keyword)
6474 c_parser_consume_token (parser);
6481 /* Parse an objc-selector-arg.
6485 objc-keywordname-list
6487 objc-keywordname-list:
6489 objc-keywordname-list objc-keywordname
6497 c_parser_objc_selector_arg (c_parser *parser)
6499 tree sel = c_parser_objc_selector (parser);
6500 tree list = NULL_TREE;
6501 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
6505 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6507 list = chainon (list, build_tree_list (sel, NULL_TREE));
6508 sel = c_parser_objc_selector (parser);
6509 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
6515 /* Parse an objc-receiver.
6524 c_parser_objc_receiver (c_parser *parser)
6526 if (c_parser_peek_token (parser)->type == CPP_NAME
6527 && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME
6528 || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME))
6530 tree id = c_parser_peek_token (parser)->value;
6531 c_parser_consume_token (parser);
6532 return objc_get_class_reference (id);
6534 return c_parser_expression (parser).value;
6537 /* Parse objc-message-args.
6541 objc-keywordarg-list
6543 objc-keywordarg-list:
6545 objc-keywordarg-list objc-keywordarg
6548 objc-selector : objc-keywordexpr
6553 c_parser_objc_message_args (c_parser *parser)
6555 tree sel = c_parser_objc_selector (parser);
6556 tree list = NULL_TREE;
6557 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
6562 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6564 keywordexpr = c_parser_objc_keywordexpr (parser);
6565 list = chainon (list, build_tree_list (sel, keywordexpr));
6566 sel = c_parser_objc_selector (parser);
6567 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
6573 /* Parse an objc-keywordexpr.
6580 c_parser_objc_keywordexpr (c_parser *parser)
6582 tree list = c_parser_expr_list (parser, true);
6583 if (TREE_CHAIN (list) == NULL_TREE)
6585 /* Just return the expression, remove a level of
6587 return TREE_VALUE (list);
6591 /* We have a comma expression, we will collapse later. */
6597 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6598 should be considered, statements. ALLOW_STMT is true if we're within
6599 the context of a function and such pragmas are to be allowed. Returns
6600 true if we actually parsed such a pragma. */
6603 c_parser_pragma (c_parser *parser, enum pragma_context context)
6607 id = c_parser_peek_token (parser)->pragma_kind;
6608 gcc_assert (id != PRAGMA_NONE);
6612 case PRAGMA_OMP_BARRIER:
6613 if (context != pragma_compound)
6615 if (context == pragma_stmt)
6616 c_parser_error (parser, "%<#pragma omp barrier%> may only be "
6617 "used in compound statements");
6620 c_parser_omp_barrier (parser);
6623 case PRAGMA_OMP_FLUSH:
6624 if (context != pragma_compound)
6626 if (context == pragma_stmt)
6627 c_parser_error (parser, "%<#pragma omp flush%> may only be "
6628 "used in compound statements");
6631 c_parser_omp_flush (parser);
6634 case PRAGMA_OMP_TASKWAIT:
6635 if (context != pragma_compound)
6637 if (context == pragma_stmt)
6638 c_parser_error (parser, "%<#pragma omp taskwait%> may only be "
6639 "used in compound statements");
6642 c_parser_omp_taskwait (parser);
6645 case PRAGMA_OMP_THREADPRIVATE:
6646 c_parser_omp_threadprivate (parser);
6649 case PRAGMA_OMP_SECTION:
6650 error_at (c_parser_peek_token (parser)->location,
6651 "%<#pragma omp section%> may only be used in "
6652 "%<#pragma omp sections%> construct");
6653 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6656 case PRAGMA_GCC_PCH_PREPROCESS:
6657 c_parser_error (parser, "%<#pragma GCC pch_preprocess%> must be first");
6658 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6662 if (id < PRAGMA_FIRST_EXTERNAL)
6664 if (context == pragma_external)
6667 c_parser_error (parser, "expected declaration specifiers");
6668 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6671 c_parser_omp_construct (parser);
6677 c_parser_consume_pragma (parser);
6678 c_invoke_pragma_handler (id);
6680 /* Skip to EOL, but suppress any error message. Those will have been
6681 generated by the handler routine through calling error, as opposed
6682 to calling c_parser_error. */
6683 parser->error = true;
6684 c_parser_skip_to_pragma_eol (parser);
6689 /* The interface the pragma parsers have to the lexer. */
6692 pragma_lex (tree *value)
6694 c_token *tok = c_parser_peek_token (the_parser);
6695 enum cpp_ttype ret = tok->type;
6697 *value = tok->value;
6698 if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF)
6702 if (ret == CPP_KEYWORD)
6704 c_parser_consume_token (the_parser);
6711 c_parser_pragma_pch_preprocess (c_parser *parser)
6715 c_parser_consume_pragma (parser);
6716 if (c_parser_next_token_is (parser, CPP_STRING))
6718 name = c_parser_peek_token (parser)->value;
6719 c_parser_consume_token (parser);
6722 c_parser_error (parser, "expected string literal");
6723 c_parser_skip_to_pragma_eol (parser);
6726 c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name));
6729 /* OpenMP 2.5 parsing routines. */
6731 /* Returns name of the next clause.
6732 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6733 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6734 returned and the token is consumed. */
6736 static pragma_omp_clause
6737 c_parser_omp_clause_name (c_parser *parser)
6739 pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE;
6741 if (c_parser_next_token_is_keyword (parser, RID_IF))
6742 result = PRAGMA_OMP_CLAUSE_IF;
6743 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
6744 result = PRAGMA_OMP_CLAUSE_DEFAULT;
6745 else if (c_parser_next_token_is (parser, CPP_NAME))
6747 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
6752 if (!strcmp ("collapse", p))
6753 result = PRAGMA_OMP_CLAUSE_COLLAPSE;
6754 else if (!strcmp ("copyin", p))
6755 result = PRAGMA_OMP_CLAUSE_COPYIN;
6756 else if (!strcmp ("copyprivate", p))
6757 result = PRAGMA_OMP_CLAUSE_COPYPRIVATE;
6760 if (!strcmp ("firstprivate", p))
6761 result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE;
6764 if (!strcmp ("lastprivate", p))
6765 result = PRAGMA_OMP_CLAUSE_LASTPRIVATE;
6768 if (!strcmp ("nowait", p))
6769 result = PRAGMA_OMP_CLAUSE_NOWAIT;
6770 else if (!strcmp ("num_threads", p))
6771 result = PRAGMA_OMP_CLAUSE_NUM_THREADS;
6774 if (!strcmp ("ordered", p))
6775 result = PRAGMA_OMP_CLAUSE_ORDERED;
6778 if (!strcmp ("private", p))
6779 result = PRAGMA_OMP_CLAUSE_PRIVATE;
6782 if (!strcmp ("reduction", p))
6783 result = PRAGMA_OMP_CLAUSE_REDUCTION;
6786 if (!strcmp ("schedule", p))
6787 result = PRAGMA_OMP_CLAUSE_SCHEDULE;
6788 else if (!strcmp ("shared", p))
6789 result = PRAGMA_OMP_CLAUSE_SHARED;
6792 if (!strcmp ("untied", p))
6793 result = PRAGMA_OMP_CLAUSE_UNTIED;
6798 if (result != PRAGMA_OMP_CLAUSE_NONE)
6799 c_parser_consume_token (parser);
6804 /* Validate that a clause of the given type does not already exist. */
6807 check_no_duplicate_clause (tree clauses, enum omp_clause_code code,
6812 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
6813 if (OMP_CLAUSE_CODE (c) == code)
6815 error ("too many %qs clauses", name);
6823 variable-list , identifier
6825 If KIND is nonzero, create the appropriate node and install the decl
6826 in OMP_CLAUSE_DECL and add the node to the head of the list.
6828 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6829 return the list created. */
6832 c_parser_omp_variable_list (c_parser *parser, enum omp_clause_code kind,
6835 if (c_parser_next_token_is_not (parser, CPP_NAME)
6836 || c_parser_peek_token (parser)->id_kind != C_ID_ID)
6837 c_parser_error (parser, "expected identifier");
6839 while (c_parser_next_token_is (parser, CPP_NAME)
6840 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
6842 tree t = lookup_name (c_parser_peek_token (parser)->value);
6845 undeclared_variable (c_parser_peek_token (parser)->value,
6846 c_parser_peek_token (parser)->location);
6847 else if (t == error_mark_node)
6851 tree u = build_omp_clause (kind);
6852 OMP_CLAUSE_DECL (u) = t;
6853 OMP_CLAUSE_CHAIN (u) = list;
6857 list = tree_cons (t, NULL_TREE, list);
6859 c_parser_consume_token (parser);
6861 if (c_parser_next_token_is_not (parser, CPP_COMMA))
6864 c_parser_consume_token (parser);
6870 /* Similarly, but expect leading and trailing parenthesis. This is a very
6871 common case for omp clauses. */
6874 c_parser_omp_var_list_parens (c_parser *parser, enum omp_clause_code kind,
6877 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6879 list = c_parser_omp_variable_list (parser, kind, list);
6880 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6886 collapse ( constant-expression ) */
6889 c_parser_omp_clause_collapse (c_parser *parser, tree list)
6891 tree c, num = error_mark_node;
6895 check_no_duplicate_clause (list, OMP_CLAUSE_COLLAPSE, "collapse");
6897 loc = c_parser_peek_token (parser)->location;
6898 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6900 num = c_parser_expr_no_commas (parser, NULL).value;
6901 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6903 if (num == error_mark_node)
6905 if (!INTEGRAL_TYPE_P (TREE_TYPE (num))
6906 || !host_integerp (num, 0)
6907 || (n = tree_low_cst (num, 0)) <= 0
6911 "collapse argument needs positive constant integer expression");
6914 c = build_omp_clause (OMP_CLAUSE_COLLAPSE);
6915 OMP_CLAUSE_COLLAPSE_EXPR (c) = num;
6916 OMP_CLAUSE_CHAIN (c) = list;
6921 copyin ( variable-list ) */
6924 c_parser_omp_clause_copyin (c_parser *parser, tree list)
6926 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYIN, list);
6930 copyprivate ( variable-list ) */
6933 c_parser_omp_clause_copyprivate (c_parser *parser, tree list)
6935 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYPRIVATE, list);
6939 default ( shared | none ) */
6942 c_parser_omp_clause_default (c_parser *parser, tree list)
6944 enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED;
6947 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6949 if (c_parser_next_token_is (parser, CPP_NAME))
6951 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
6956 if (strcmp ("none", p) != 0)
6958 kind = OMP_CLAUSE_DEFAULT_NONE;
6962 if (strcmp ("shared", p) != 0)
6964 kind = OMP_CLAUSE_DEFAULT_SHARED;
6971 c_parser_consume_token (parser);
6976 c_parser_error (parser, "expected %<none%> or %<shared%>");
6978 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6980 if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED)
6983 check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default");
6984 c = build_omp_clause (OMP_CLAUSE_DEFAULT);
6985 OMP_CLAUSE_CHAIN (c) = list;
6986 OMP_CLAUSE_DEFAULT_KIND (c) = kind;
6992 firstprivate ( variable-list ) */
6995 c_parser_omp_clause_firstprivate (c_parser *parser, tree list)
6997 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_FIRSTPRIVATE, list);
7001 if ( expression ) */
7004 c_parser_omp_clause_if (c_parser *parser, tree list)
7006 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7008 tree t = c_parser_paren_condition (parser);
7011 check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if");
7013 c = build_omp_clause (OMP_CLAUSE_IF);
7014 OMP_CLAUSE_IF_EXPR (c) = t;
7015 OMP_CLAUSE_CHAIN (c) = list;
7019 c_parser_error (parser, "expected %<(%>");
7025 lastprivate ( variable-list ) */
7028 c_parser_omp_clause_lastprivate (c_parser *parser, tree list)
7030 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_LASTPRIVATE, list);
7037 c_parser_omp_clause_nowait (c_parser *parser ATTRIBUTE_UNUSED, tree list)
7041 check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait");
7043 c = build_omp_clause (OMP_CLAUSE_NOWAIT);
7044 OMP_CLAUSE_CHAIN (c) = list;
7049 num_threads ( expression ) */
7052 c_parser_omp_clause_num_threads (c_parser *parser, tree list)
7054 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7056 location_t expr_loc = c_parser_peek_token (parser)->location;
7057 tree c, t = c_parser_expression (parser).value;
7059 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7061 if (!INTEGRAL_TYPE_P (TREE_TYPE (t)))
7063 c_parser_error (parser, "expected integer expression");
7067 /* Attempt to statically determine when the number isn't positive. */
7068 c = fold_build2 (LE_EXPR, boolean_type_node, t,
7069 build_int_cst (TREE_TYPE (t), 0));
7070 if (c == boolean_true_node)
7072 warning_at (expr_loc, 0,
7073 "%<num_threads%> value must be positive");
7074 t = integer_one_node;
7077 check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads");
7079 c = build_omp_clause (OMP_CLAUSE_NUM_THREADS);
7080 OMP_CLAUSE_NUM_THREADS_EXPR (c) = t;
7081 OMP_CLAUSE_CHAIN (c) = list;
7092 c_parser_omp_clause_ordered (c_parser *parser ATTRIBUTE_UNUSED, tree list)
7096 check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered");
7098 c = build_omp_clause (OMP_CLAUSE_ORDERED);
7099 OMP_CLAUSE_CHAIN (c) = list;
7104 private ( variable-list ) */
7107 c_parser_omp_clause_private (c_parser *parser, tree list)
7109 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_PRIVATE, list);
7113 reduction ( reduction-operator : variable-list )
7116 One of: + * - & ^ | && || */
7119 c_parser_omp_clause_reduction (c_parser *parser, tree list)
7121 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7123 enum tree_code code;
7125 switch (c_parser_peek_token (parser)->type)
7137 code = BIT_AND_EXPR;
7140 code = BIT_XOR_EXPR;
7143 code = BIT_IOR_EXPR;
7146 code = TRUTH_ANDIF_EXPR;
7149 code = TRUTH_ORIF_EXPR;
7152 c_parser_error (parser,
7153 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
7154 "%<^%>, %<|%>, %<&&%>, or %<||%>");
7155 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
7158 c_parser_consume_token (parser);
7159 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
7163 nl = c_parser_omp_variable_list (parser, OMP_CLAUSE_REDUCTION, list);
7164 for (c = nl; c != list; c = OMP_CLAUSE_CHAIN (c))
7165 OMP_CLAUSE_REDUCTION_CODE (c) = code;
7169 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7175 schedule ( schedule-kind )
7176 schedule ( schedule-kind , expression )
7179 static | dynamic | guided | runtime | auto
7183 c_parser_omp_clause_schedule (c_parser *parser, tree list)
7187 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7190 c = build_omp_clause (OMP_CLAUSE_SCHEDULE);
7192 if (c_parser_next_token_is (parser, CPP_NAME))
7194 tree kind = c_parser_peek_token (parser)->value;
7195 const char *p = IDENTIFIER_POINTER (kind);
7200 if (strcmp ("dynamic", p) != 0)
7202 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC;
7206 if (strcmp ("guided", p) != 0)
7208 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED;
7212 if (strcmp ("runtime", p) != 0)
7214 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME;
7221 else if (c_parser_next_token_is_keyword (parser, RID_STATIC))
7222 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC;
7223 else if (c_parser_next_token_is_keyword (parser, RID_AUTO))
7224 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO;
7228 c_parser_consume_token (parser);
7229 if (c_parser_next_token_is (parser, CPP_COMMA))
7232 c_parser_consume_token (parser);
7234 here = c_parser_peek_token (parser)->location;
7235 t = c_parser_expr_no_commas (parser, NULL).value;
7237 if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME)
7238 error_at (here, "schedule %<runtime%> does not take "
7239 "a %<chunk_size%> parameter");
7240 else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_AUTO)
7242 "schedule %<auto%> does not take "
7243 "a %<chunk_size%> parameter");
7244 else if (TREE_CODE (TREE_TYPE (t)) == INTEGER_TYPE)
7245 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t;
7247 c_parser_error (parser, "expected integer expression");
7249 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7252 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
7253 "expected %<,%> or %<)%>");
7255 check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule");
7256 OMP_CLAUSE_CHAIN (c) = list;
7260 c_parser_error (parser, "invalid schedule kind");
7261 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
7266 shared ( variable-list ) */
7269 c_parser_omp_clause_shared (c_parser *parser, tree list)
7271 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_SHARED, list);
7278 c_parser_omp_clause_untied (c_parser *parser ATTRIBUTE_UNUSED, tree list)
7282 /* FIXME: Should we allow duplicates? */
7283 check_no_duplicate_clause (list, OMP_CLAUSE_UNTIED, "untied");
7285 c = build_omp_clause (OMP_CLAUSE_UNTIED);
7286 OMP_CLAUSE_CHAIN (c) = list;
7290 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7291 is a bitmask in MASK. Return the list of clauses found; the result
7292 of clause default goes in *pdefault. */
7295 c_parser_omp_all_clauses (c_parser *parser, unsigned int mask,
7298 tree clauses = NULL;
7301 while (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7304 pragma_omp_clause c_kind;
7306 tree prev = clauses;
7308 if (!first && c_parser_next_token_is (parser, CPP_COMMA))
7309 c_parser_consume_token (parser);
7312 here = c_parser_peek_token (parser)->location;
7313 c_kind = c_parser_omp_clause_name (parser);
7317 case PRAGMA_OMP_CLAUSE_COLLAPSE:
7318 clauses = c_parser_omp_clause_collapse (parser, clauses);
7319 c_name = "collapse";
7321 case PRAGMA_OMP_CLAUSE_COPYIN:
7322 clauses = c_parser_omp_clause_copyin (parser, clauses);
7325 case PRAGMA_OMP_CLAUSE_COPYPRIVATE:
7326 clauses = c_parser_omp_clause_copyprivate (parser, clauses);
7327 c_name = "copyprivate";
7329 case PRAGMA_OMP_CLAUSE_DEFAULT:
7330 clauses = c_parser_omp_clause_default (parser, clauses);
7333 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE:
7334 clauses = c_parser_omp_clause_firstprivate (parser, clauses);
7335 c_name = "firstprivate";
7337 case PRAGMA_OMP_CLAUSE_IF:
7338 clauses = c_parser_omp_clause_if (parser, clauses);
7341 case PRAGMA_OMP_CLAUSE_LASTPRIVATE:
7342 clauses = c_parser_omp_clause_lastprivate (parser, clauses);
7343 c_name = "lastprivate";
7345 case PRAGMA_OMP_CLAUSE_NOWAIT:
7346 clauses = c_parser_omp_clause_nowait (parser, clauses);
7349 case PRAGMA_OMP_CLAUSE_NUM_THREADS:
7350 clauses = c_parser_omp_clause_num_threads (parser, clauses);
7351 c_name = "num_threads";
7353 case PRAGMA_OMP_CLAUSE_ORDERED:
7354 clauses = c_parser_omp_clause_ordered (parser, clauses);
7357 case PRAGMA_OMP_CLAUSE_PRIVATE:
7358 clauses = c_parser_omp_clause_private (parser, clauses);
7361 case PRAGMA_OMP_CLAUSE_REDUCTION:
7362 clauses = c_parser_omp_clause_reduction (parser, clauses);
7363 c_name = "reduction";
7365 case PRAGMA_OMP_CLAUSE_SCHEDULE:
7366 clauses = c_parser_omp_clause_schedule (parser, clauses);
7367 c_name = "schedule";
7369 case PRAGMA_OMP_CLAUSE_SHARED:
7370 clauses = c_parser_omp_clause_shared (parser, clauses);
7373 case PRAGMA_OMP_CLAUSE_UNTIED:
7374 clauses = c_parser_omp_clause_untied (parser, clauses);
7378 c_parser_error (parser, "expected %<#pragma omp%> clause");
7382 if (((mask >> c_kind) & 1) == 0 && !parser->error)
7384 /* Remove the invalid clause(s) from the list to avoid
7385 confusing the rest of the compiler. */
7387 error_at (here, "%qs is not valid for %qs", c_name, where);
7392 c_parser_skip_to_pragma_eol (parser);
7394 return c_finish_omp_clauses (clauses);
7401 In practice, we're also interested in adding the statement to an
7402 outer node. So it is convenient if we work around the fact that
7403 c_parser_statement calls add_stmt. */
7406 c_parser_omp_structured_block (c_parser *parser)
7408 tree stmt = push_stmt_list ();
7409 c_parser_statement (parser);
7410 return pop_stmt_list (stmt);
7414 # pragma omp atomic new-line
7418 x binop= expr | x++ | ++x | x-- | --x
7420 +, *, -, /, &, ^, |, <<, >>
7422 where x is an lvalue expression with scalar type. */
7425 c_parser_omp_atomic (c_parser *parser)
7429 enum tree_code code;
7430 struct c_expr rhs_expr;
7432 c_parser_skip_to_pragma_eol (parser);
7434 lhs = c_parser_unary_expression (parser).value;
7435 switch (TREE_CODE (lhs))
7439 c_parser_skip_to_end_of_block_or_statement (parser);
7442 case PREINCREMENT_EXPR:
7443 case POSTINCREMENT_EXPR:
7444 lhs = TREE_OPERAND (lhs, 0);
7446 rhs = integer_one_node;
7449 case PREDECREMENT_EXPR:
7450 case POSTDECREMENT_EXPR:
7451 lhs = TREE_OPERAND (lhs, 0);
7453 rhs = integer_one_node;
7457 switch (c_parser_peek_token (parser)->type)
7463 code = TRUNC_DIV_EXPR;
7478 code = BIT_AND_EXPR;
7481 code = BIT_IOR_EXPR;
7484 code = BIT_XOR_EXPR;
7487 c_parser_error (parser,
7488 "invalid operator for %<#pragma omp atomic%>");
7492 c_parser_consume_token (parser);
7493 rhs_expr = c_parser_expression (parser);
7494 rhs_expr = default_function_array_conversion (rhs_expr);
7495 rhs = rhs_expr.value;
7498 stmt = c_finish_omp_atomic (code, lhs, rhs);
7499 if (stmt != error_mark_node)
7501 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7506 # pragma omp barrier new-line
7510 c_parser_omp_barrier (c_parser *parser)
7512 c_parser_consume_pragma (parser);
7513 c_parser_skip_to_pragma_eol (parser);
7515 c_finish_omp_barrier ();
7519 # pragma omp critical [(name)] new-line
7524 c_parser_omp_critical (c_parser *parser)
7526 tree stmt, name = NULL;
7528 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7530 c_parser_consume_token (parser);
7531 if (c_parser_next_token_is (parser, CPP_NAME))
7533 name = c_parser_peek_token (parser)->value;
7534 c_parser_consume_token (parser);
7535 c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7538 c_parser_error (parser, "expected identifier");
7540 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7541 c_parser_error (parser, "expected %<(%> or end of line");
7542 c_parser_skip_to_pragma_eol (parser);
7544 stmt = c_parser_omp_structured_block (parser);
7545 return c_finish_omp_critical (stmt, name);
7549 # pragma omp flush flush-vars[opt] new-line
7552 ( variable-list ) */
7555 c_parser_omp_flush (c_parser *parser)
7557 c_parser_consume_pragma (parser);
7558 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7559 c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL);
7560 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7561 c_parser_error (parser, "expected %<(%> or end of line");
7562 c_parser_skip_to_pragma_eol (parser);
7564 c_finish_omp_flush ();
7567 /* Parse the restricted form of the for statement allowed by OpenMP.
7568 The real trick here is to determine the loop control variable early
7569 so that we can push a new decl if necessary to make it private. */
7572 c_parser_omp_for_loop (c_parser *parser, tree clauses, tree *par_clauses)
7574 tree decl, cond, incr, save_break, save_cont, body, init, stmt, cl;
7575 tree declv, condv, incrv, initv, for_block = NULL, ret = NULL;
7577 bool fail = false, open_brace_parsed = false;
7578 int i, collapse = 1, nbraces = 0;
7580 for (cl = clauses; cl; cl = OMP_CLAUSE_CHAIN (cl))
7581 if (OMP_CLAUSE_CODE (cl) == OMP_CLAUSE_COLLAPSE)
7582 collapse = tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl), 0);
7584 gcc_assert (collapse >= 1);
7586 declv = make_tree_vec (collapse);
7587 initv = make_tree_vec (collapse);
7588 condv = make_tree_vec (collapse);
7589 incrv = make_tree_vec (collapse);
7591 if (!c_parser_next_token_is_keyword (parser, RID_FOR))
7593 c_parser_error (parser, "for statement expected");
7596 loc = c_parser_peek_token (parser)->location;
7597 c_parser_consume_token (parser);
7599 for (i = 0; i < collapse; i++)
7603 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7606 /* Parse the initialization declaration or expression. */
7607 if (c_parser_next_token_starts_declspecs (parser))
7611 = tree_cons (NULL, c_begin_compound_stmt (true), for_block);
7612 c_parser_declaration_or_fndef (parser, true, true, true, true);
7613 decl = check_for_loop_decls ();
7616 if (DECL_INITIAL (decl) == error_mark_node)
7617 decl = error_mark_node;
7620 else if (c_parser_next_token_is (parser, CPP_NAME)
7621 && c_parser_peek_2nd_token (parser)->type == CPP_EQ)
7623 struct c_expr init_exp;
7624 location_t init_loc;
7626 decl = c_parser_postfix_expression (parser).value;
7628 c_parser_require (parser, CPP_EQ, "expected %<=%>");
7629 init_loc = c_parser_peek_token (parser)->location;
7631 init_exp = c_parser_expr_no_commas (parser, NULL);
7632 init_exp = default_function_array_conversion (init_exp);
7633 init = build_modify_expr (init_loc,
7634 decl, NOP_EXPR, init_exp.value);
7635 init = c_process_expr_stmt (init);
7637 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7642 c_parser_error (parser,
7643 "expected iteration declaration or initialization");
7644 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
7650 /* Parse the loop condition. */
7652 if (c_parser_next_token_is_not (parser, CPP_SEMICOLON))
7654 location_t cond_loc = c_parser_peek_token (parser)->location;
7656 cond = c_parser_expression_conv (parser).value;
7657 cond = c_objc_common_truthvalue_conversion (cond_loc, cond);
7658 protected_set_expr_location (cond, cond_loc);
7660 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7662 /* Parse the increment expression. */
7664 if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN))
7666 location_t incr_loc = c_parser_peek_token (parser)->location;
7668 incr = c_process_expr_stmt (c_parser_expression (parser).value);
7669 protected_set_expr_location (incr, incr_loc);
7671 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7673 if (decl == NULL || decl == error_mark_node || init == error_mark_node)
7677 TREE_VEC_ELT (declv, i) = decl;
7678 TREE_VEC_ELT (initv, i) = init;
7679 TREE_VEC_ELT (condv, i) = cond;
7680 TREE_VEC_ELT (incrv, i) = incr;
7684 if (i == collapse - 1)
7687 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
7688 in between the collapsed for loops to be still considered perfectly
7689 nested. Hopefully the final version clarifies this.
7690 For now handle (multiple) {'s and empty statements. */
7693 if (c_parser_next_token_is_keyword (parser, RID_FOR))
7695 c_parser_consume_token (parser);
7698 else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
7700 c_parser_consume_token (parser);
7704 && c_parser_next_token_is (parser, CPP_SEMICOLON))
7705 c_parser_consume_token (parser);
7708 c_parser_error (parser, "not enough perfectly nested loops");
7711 open_brace_parsed = true;
7721 nbraces += bracecount;
7724 save_break = c_break_label;
7725 c_break_label = size_one_node;
7726 save_cont = c_cont_label;
7727 c_cont_label = NULL_TREE;
7728 body = push_stmt_list ();
7730 if (open_brace_parsed)
7732 stmt = c_begin_compound_stmt (true);
7733 c_parser_compound_statement_nostart (parser);
7734 add_stmt (c_end_compound_stmt (stmt, true));
7737 add_stmt (c_parser_c99_block_statement (parser));
7739 add_stmt (build1 (LABEL_EXPR, void_type_node, c_cont_label));
7741 body = pop_stmt_list (body);
7742 c_break_label = save_break;
7743 c_cont_label = save_cont;
7747 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7749 c_parser_consume_token (parser);
7752 else if (c_parser_next_token_is (parser, CPP_SEMICOLON))
7753 c_parser_consume_token (parser);
7756 c_parser_error (parser, "collapsed loops not perfectly nested");
7759 stmt = c_begin_compound_stmt (true);
7761 c_parser_compound_statement_nostart (parser);
7762 body = c_end_compound_stmt (stmt, true);
7769 /* Only bother calling c_finish_omp_for if we haven't already generated
7770 an error from the initialization parsing. */
7773 stmt = c_finish_omp_for (loc, declv, initv, condv, incrv, body, NULL);
7776 if (par_clauses != NULL)
7779 for (c = par_clauses; *c ; )
7780 if (OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_FIRSTPRIVATE
7781 && OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_LASTPRIVATE)
7782 c = &OMP_CLAUSE_CHAIN (*c);
7785 for (i = 0; i < collapse; i++)
7786 if (TREE_VEC_ELT (declv, i) == OMP_CLAUSE_DECL (*c))
7789 c = &OMP_CLAUSE_CHAIN (*c);
7790 else if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_FIRSTPRIVATE)
7793 "iteration variable %qD should not be firstprivate",
7794 OMP_CLAUSE_DECL (*c));
7795 *c = OMP_CLAUSE_CHAIN (*c);
7799 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
7800 change it to shared (decl) in
7801 OMP_PARALLEL_CLAUSES. */
7802 tree l = build_omp_clause (OMP_CLAUSE_LASTPRIVATE);
7803 OMP_CLAUSE_DECL (l) = OMP_CLAUSE_DECL (*c);
7804 OMP_CLAUSE_CHAIN (l) = clauses;
7806 OMP_CLAUSE_SET_CODE (*c, OMP_CLAUSE_SHARED);
7810 OMP_FOR_CLAUSES (stmt) = clauses;
7817 stmt = c_end_compound_stmt (TREE_VALUE (for_block), true);
7819 for_block = TREE_CHAIN (for_block);
7825 #pragma omp for for-clause[optseq] new-line
7829 #define OMP_FOR_CLAUSE_MASK \
7830 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7831 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7832 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7833 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7834 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7835 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7836 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
7837 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7840 c_parser_omp_for (c_parser *parser)
7842 tree block, clauses, ret;
7844 clauses = c_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK,
7847 block = c_begin_compound_stmt (true);
7848 ret = c_parser_omp_for_loop (parser, clauses, NULL);
7849 block = c_end_compound_stmt (block, true);
7856 # pragma omp master new-line
7861 c_parser_omp_master (c_parser *parser)
7863 c_parser_skip_to_pragma_eol (parser);
7864 return c_finish_omp_master (c_parser_omp_structured_block (parser));
7868 # pragma omp ordered new-line
7873 c_parser_omp_ordered (c_parser *parser)
7875 c_parser_skip_to_pragma_eol (parser);
7876 return c_finish_omp_ordered (c_parser_omp_structured_block (parser));
7882 { section-sequence }
7885 section-directive[opt] structured-block
7886 section-sequence section-directive structured-block */
7889 c_parser_omp_sections_scope (c_parser *parser)
7892 bool error_suppress = false;
7895 if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
7897 /* Avoid skipping until the end of the block. */
7898 parser->error = false;
7902 stmt = push_stmt_list ();
7904 loc = c_parser_peek_token (parser)->location;
7905 if (c_parser_peek_token (parser)->pragma_kind != PRAGMA_OMP_SECTION)
7907 substmt = push_stmt_list ();
7911 c_parser_statement (parser);
7913 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
7915 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7917 if (c_parser_next_token_is (parser, CPP_EOF))
7921 substmt = pop_stmt_list (substmt);
7922 substmt = build1 (OMP_SECTION, void_type_node, substmt);
7923 SET_EXPR_LOCATION (substmt, loc);
7929 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7931 if (c_parser_next_token_is (parser, CPP_EOF))
7934 loc = c_parser_peek_token (parser)->location;
7935 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
7937 c_parser_consume_pragma (parser);
7938 c_parser_skip_to_pragma_eol (parser);
7939 error_suppress = false;
7941 else if (!error_suppress)
7943 error_at (loc, "expected %<#pragma omp section%> or %<}%>");
7944 error_suppress = true;
7947 substmt = c_parser_omp_structured_block (parser);
7948 substmt = build1 (OMP_SECTION, void_type_node, substmt);
7949 SET_EXPR_LOCATION (substmt, loc);
7952 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE,
7953 "expected %<#pragma omp section%> or %<}%>");
7955 substmt = pop_stmt_list (stmt);
7957 stmt = make_node (OMP_SECTIONS);
7958 TREE_TYPE (stmt) = void_type_node;
7959 OMP_SECTIONS_BODY (stmt) = substmt;
7961 return add_stmt (stmt);
7965 # pragma omp sections sections-clause[optseq] newline
7969 #define OMP_SECTIONS_CLAUSE_MASK \
7970 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7971 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7972 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7973 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7974 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7977 c_parser_omp_sections (c_parser *parser)
7979 tree block, clauses, ret;
7981 clauses = c_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK,
7982 "#pragma omp sections");
7984 block = c_begin_compound_stmt (true);
7985 ret = c_parser_omp_sections_scope (parser);
7987 OMP_SECTIONS_CLAUSES (ret) = clauses;
7988 block = c_end_compound_stmt (block, true);
7995 # pragma parallel parallel-clause new-line
7996 # pragma parallel for parallel-for-clause new-line
7997 # pragma parallel sections parallel-sections-clause new-line
8000 #define OMP_PARALLEL_CLAUSE_MASK \
8001 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8002 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8003 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8004 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8005 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
8006 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
8007 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
8008 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
8011 c_parser_omp_parallel (c_parser *parser)
8013 enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL;
8014 const char *p_name = "#pragma omp parallel";
8015 tree stmt, clauses, par_clause, ws_clause, block;
8016 unsigned int mask = OMP_PARALLEL_CLAUSE_MASK;
8018 if (c_parser_next_token_is_keyword (parser, RID_FOR))
8020 c_parser_consume_token (parser);
8021 p_kind = PRAGMA_OMP_PARALLEL_FOR;
8022 p_name = "#pragma omp parallel for";
8023 mask |= OMP_FOR_CLAUSE_MASK;
8024 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
8026 else if (c_parser_next_token_is (parser, CPP_NAME))
8028 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
8029 if (strcmp (p, "sections") == 0)
8031 c_parser_consume_token (parser);
8032 p_kind = PRAGMA_OMP_PARALLEL_SECTIONS;
8033 p_name = "#pragma omp parallel sections";
8034 mask |= OMP_SECTIONS_CLAUSE_MASK;
8035 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
8039 clauses = c_parser_omp_all_clauses (parser, mask, p_name);
8043 case PRAGMA_OMP_PARALLEL:
8044 block = c_begin_omp_parallel ();
8045 c_parser_statement (parser);
8046 stmt = c_finish_omp_parallel (clauses, block);
8049 case PRAGMA_OMP_PARALLEL_FOR:
8050 block = c_begin_omp_parallel ();
8051 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
8052 c_parser_omp_for_loop (parser, ws_clause, &par_clause);
8053 stmt = c_finish_omp_parallel (par_clause, block);
8054 OMP_PARALLEL_COMBINED (stmt) = 1;
8057 case PRAGMA_OMP_PARALLEL_SECTIONS:
8058 block = c_begin_omp_parallel ();
8059 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
8060 stmt = c_parser_omp_sections_scope (parser);
8062 OMP_SECTIONS_CLAUSES (stmt) = ws_clause;
8063 stmt = c_finish_omp_parallel (par_clause, block);
8064 OMP_PARALLEL_COMBINED (stmt) = 1;
8075 # pragma omp single single-clause[optseq] new-line
8079 #define OMP_SINGLE_CLAUSE_MASK \
8080 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8081 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8082 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
8083 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
8086 c_parser_omp_single (c_parser *parser)
8088 tree stmt = make_node (OMP_SINGLE);
8089 TREE_TYPE (stmt) = void_type_node;
8091 OMP_SINGLE_CLAUSES (stmt)
8092 = c_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK,
8093 "#pragma omp single");
8094 OMP_SINGLE_BODY (stmt) = c_parser_omp_structured_block (parser);
8096 return add_stmt (stmt);
8100 # pragma omp task task-clause[optseq] new-line
8103 #define OMP_TASK_CLAUSE_MASK \
8104 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8105 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
8106 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8107 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8108 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8109 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
8112 c_parser_omp_task (c_parser *parser)
8114 tree clauses, block;
8116 clauses = c_parser_omp_all_clauses (parser, OMP_TASK_CLAUSE_MASK,
8117 "#pragma omp task");
8119 block = c_begin_omp_task ();
8120 c_parser_statement (parser);
8121 return c_finish_omp_task (clauses, block);
8125 # pragma omp taskwait new-line
8129 c_parser_omp_taskwait (c_parser *parser)
8131 c_parser_consume_pragma (parser);
8132 c_parser_skip_to_pragma_eol (parser);
8134 c_finish_omp_taskwait ();
8137 /* Main entry point to parsing most OpenMP pragmas. */
8140 c_parser_omp_construct (c_parser *parser)
8142 enum pragma_kind p_kind;
8146 loc = c_parser_peek_token (parser)->location;
8147 p_kind = c_parser_peek_token (parser)->pragma_kind;
8148 c_parser_consume_pragma (parser);
8150 /* For all constructs below except #pragma omp atomic
8151 MUST_NOT_THROW catch handlers are needed when exceptions
8153 if (p_kind != PRAGMA_OMP_ATOMIC)
8154 c_maybe_initialize_eh ();
8158 case PRAGMA_OMP_ATOMIC:
8159 c_parser_omp_atomic (parser);
8161 case PRAGMA_OMP_CRITICAL:
8162 stmt = c_parser_omp_critical (parser);
8164 case PRAGMA_OMP_FOR:
8165 stmt = c_parser_omp_for (parser);
8167 case PRAGMA_OMP_MASTER:
8168 stmt = c_parser_omp_master (parser);
8170 case PRAGMA_OMP_ORDERED:
8171 stmt = c_parser_omp_ordered (parser);
8173 case PRAGMA_OMP_PARALLEL:
8174 stmt = c_parser_omp_parallel (parser);
8176 case PRAGMA_OMP_SECTIONS:
8177 stmt = c_parser_omp_sections (parser);
8179 case PRAGMA_OMP_SINGLE:
8180 stmt = c_parser_omp_single (parser);
8182 case PRAGMA_OMP_TASK:
8183 stmt = c_parser_omp_task (parser);
8190 SET_EXPR_LOCATION (stmt, loc);
8195 # pragma omp threadprivate (variable-list) */
8198 c_parser_omp_threadprivate (c_parser *parser)
8202 c_parser_consume_pragma (parser);
8203 vars = c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL);
8205 /* Mark every variable in VARS to be assigned thread local storage. */
8206 for (t = vars; t; t = TREE_CHAIN (t))
8208 tree v = TREE_PURPOSE (t);
8210 /* If V had already been marked threadprivate, it doesn't matter
8211 whether it had been used prior to this point. */
8212 if (TREE_CODE (v) != VAR_DECL)
8213 error ("%qD is not a variable", v);
8214 else if (TREE_USED (v) && !C_DECL_THREADPRIVATE_P (v))
8215 error ("%qE declared %<threadprivate%> after first use", v);
8216 else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v))
8217 error ("automatic variable %qE cannot be %<threadprivate%>", v);
8218 else if (TREE_TYPE (v) == error_mark_node)
8220 else if (! COMPLETE_TYPE_P (TREE_TYPE (v)))
8221 error ("%<threadprivate%> %qE has incomplete type", v);
8224 if (! DECL_THREAD_LOCAL_P (v))
8226 DECL_TLS_MODEL (v) = decl_default_tls_model (v);
8227 /* If rtl has been already set for this var, call
8228 make_decl_rtl once again, so that encode_section_info
8229 has a chance to look at the new decl flags. */
8230 if (DECL_RTL_SET_P (v))
8233 C_DECL_THREADPRIVATE_P (v) = 1;
8237 c_parser_skip_to_pragma_eol (parser);
8241 /* Parse a single source file. */
8246 /* Use local storage to begin. If the first token is a pragma, parse it.
8247 If it is #pragma GCC pch_preprocess, then this will load a PCH file
8248 which will cause garbage collection. */
8251 memset (&tparser, 0, sizeof tparser);
8252 the_parser = &tparser;
8254 if (c_parser_peek_token (&tparser)->pragma_kind == PRAGMA_GCC_PCH_PREPROCESS)
8255 c_parser_pragma_pch_preprocess (&tparser);
8257 the_parser = GGC_NEW (c_parser);
8258 *the_parser = tparser;
8260 c_parser_translation_unit (the_parser);
8264 #include "gt-c-parser.h"