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
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 : 7;
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 (OPT_Wc___compat,
225 "%Hidentifier %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;
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;
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 /* This may call cb_line_change and alter the input_location. */
1657 enum_value = c_parser_expr_no_commas (parser, NULL).value;
1660 enum_value = NULL_TREE;
1661 enum_decl = build_enumerator (&the_enum, enum_id, enum_value,
1663 TREE_CHAIN (enum_decl) = values;
1666 if (c_parser_next_token_is (parser, CPP_COMMA))
1668 comma_loc = c_parser_peek_token (parser)->location;
1670 c_parser_consume_token (parser);
1672 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
1674 if (seen_comma && !flag_isoc99)
1675 pedwarn (comma_loc, OPT_pedantic, "comma at end of enumerator list");
1676 c_parser_consume_token (parser);
1681 c_parser_error (parser, "expected %<,%> or %<}%>");
1682 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
1683 values = error_mark_node;
1687 postfix_attrs = c_parser_attributes (parser);
1688 ret.spec = finish_enum (type, nreverse (values),
1689 chainon (attrs, postfix_attrs));
1690 ret.kind = ctsk_tagdef;
1695 c_parser_error (parser, "expected %<{%>");
1696 ret.spec = error_mark_node;
1697 ret.kind = ctsk_tagref;
1700 ret = parser_xref_tag (ENUMERAL_TYPE, ident);
1701 /* In ISO C, enumerated types can be referred to only if already
1703 if (pedantic && !COMPLETE_TYPE_P (ret.spec))
1706 pedwarn (ident_loc, OPT_pedantic,
1707 "ISO C forbids forward references to %<enum%> types");
1712 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
1714 struct-or-union-specifier:
1715 struct-or-union attributes[opt] identifier[opt]
1716 { struct-contents } attributes[opt]
1717 struct-or-union attributes[opt] identifier
1720 struct-declaration-list
1722 struct-declaration-list:
1723 struct-declaration ;
1724 struct-declaration-list struct-declaration ;
1731 struct-declaration-list struct-declaration
1733 struct-declaration-list:
1734 struct-declaration-list ;
1737 (Note that in the syntax here, unlike that in ISO C, the semicolons
1738 are included here rather than in struct-declaration, in order to
1739 describe the syntax with extra semicolons and missing semicolon at
1744 struct-declaration-list:
1745 @defs ( class-name )
1747 (Note this does not include a trailing semicolon, but can be
1748 followed by further declarations, and gets a pedwarn-if-pedantic
1749 when followed by a semicolon.) */
1751 static struct c_typespec
1752 c_parser_struct_or_union_specifier (c_parser *parser)
1754 struct c_typespec ret;
1756 tree ident = NULL_TREE;
1757 enum tree_code code;
1758 switch (c_parser_peek_token (parser)->keyword)
1769 c_parser_consume_token (parser);
1770 attrs = c_parser_attributes (parser);
1771 /* Set the location in case we create a decl now. */
1772 c_parser_set_source_position_from_token (c_parser_peek_token (parser));
1773 if (c_parser_next_token_is (parser, CPP_NAME))
1775 ident = c_parser_peek_token (parser)->value;
1776 c_parser_consume_token (parser);
1778 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
1780 /* Parse a struct or union definition. Start the scope of the
1781 tag before parsing components. */
1782 tree type = start_struct (code, ident);
1784 /* We chain the components in reverse order, then put them in
1785 forward order at the end. Each struct-declaration may
1786 declare multiple components (comma-separated), so we must use
1787 chainon to join them, although when parsing each
1788 struct-declaration we can use TREE_CHAIN directly.
1790 The theory behind all this is that there will be more
1791 semicolon separated fields than comma separated fields, and
1792 so we'll be minimizing the number of node traversals required
1794 tree contents = NULL_TREE;
1795 c_parser_consume_token (parser);
1796 /* Handle the Objective-C @defs construct,
1797 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
1798 if (c_parser_next_token_is_keyword (parser, RID_AT_DEFS))
1801 gcc_assert (c_dialect_objc ());
1802 c_parser_consume_token (parser);
1803 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
1805 if (c_parser_next_token_is (parser, CPP_NAME)
1806 && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)
1808 name = c_parser_peek_token (parser)->value;
1809 c_parser_consume_token (parser);
1813 c_parser_error (parser, "expected class name");
1814 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
1817 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
1819 contents = nreverse (objc_get_class_ivars (name));
1822 /* Parse the struct-declarations and semicolons. Problems with
1823 semicolons are diagnosed here; empty structures are diagnosed
1828 /* Parse any stray semicolon. */
1829 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1831 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
1832 "extra semicolon in struct or union specified");
1833 c_parser_consume_token (parser);
1836 /* Stop if at the end of the struct or union contents. */
1837 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
1839 c_parser_consume_token (parser);
1842 /* Accept #pragmas at struct scope. */
1843 if (c_parser_next_token_is (parser, CPP_PRAGMA))
1845 c_parser_pragma (parser, pragma_external);
1848 /* Parse some comma-separated declarations, but not the
1849 trailing semicolon if any. */
1850 decls = c_parser_struct_declaration (parser);
1851 contents = chainon (decls, contents);
1852 /* If no semicolon follows, either we have a parse error or
1853 are at the end of the struct or union and should
1855 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1856 c_parser_consume_token (parser);
1859 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
1860 pedwarn (c_parser_peek_token (parser)->location, 0,
1861 "no semicolon at end of struct or union");
1864 c_parser_error (parser, "expected %<;%>");
1865 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
1870 postfix_attrs = c_parser_attributes (parser);
1871 ret.spec = finish_struct (type, nreverse (contents),
1872 chainon (attrs, postfix_attrs));
1873 ret.kind = ctsk_tagdef;
1878 c_parser_error (parser, "expected %<{%>");
1879 ret.spec = error_mark_node;
1880 ret.kind = ctsk_tagref;
1883 ret = parser_xref_tag (code, ident);
1887 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
1888 the trailing semicolon.
1891 specifier-qualifier-list struct-declarator-list
1893 specifier-qualifier-list:
1894 type-specifier specifier-qualifier-list[opt]
1895 type-qualifier specifier-qualifier-list[opt]
1896 attributes specifier-qualifier-list[opt]
1898 struct-declarator-list:
1900 struct-declarator-list , attributes[opt] struct-declarator
1903 declarator attributes[opt]
1904 declarator[opt] : constant-expression attributes[opt]
1909 __extension__ struct-declaration
1910 specifier-qualifier-list
1912 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
1913 of attributes where shown is a GNU extension. In GNU C, we accept
1914 any expression without commas in the syntax (assignment
1915 expressions, not just conditional expressions); assignment
1916 expressions will be diagnosed as non-constant. */
1919 c_parser_struct_declaration (c_parser *parser)
1921 struct c_declspecs *specs;
1923 tree all_prefix_attrs;
1925 location_t decl_loc;
1926 if (c_parser_next_token_is_keyword (parser, RID_EXTENSION))
1930 ext = disable_extension_diagnostics ();
1931 c_parser_consume_token (parser);
1932 decl = c_parser_struct_declaration (parser);
1933 restore_extension_diagnostics (ext);
1936 specs = build_null_declspecs ();
1937 decl_loc = c_parser_peek_token (parser)->location;
1938 c_parser_declspecs (parser, specs, false, true, true);
1941 if (!specs->declspecs_seen_p)
1943 c_parser_error (parser, "expected specifier-qualifier-list");
1946 finish_declspecs (specs);
1947 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1950 if (!specs->type_seen_p)
1952 pedwarn (decl_loc, OPT_pedantic,
1953 "ISO C forbids member declarations with no members");
1954 shadow_tag_warned (specs, pedantic);
1959 /* Support for unnamed structs or unions as members of
1960 structs or unions (which is [a] useful and [b] supports
1964 ret = grokfield (c_parser_peek_token (parser)->location,
1965 build_id_declarator (NULL_TREE), specs,
1968 decl_attributes (&ret, attrs, 0);
1972 pending_xref_error ();
1973 prefix_attrs = specs->attrs;
1974 all_prefix_attrs = prefix_attrs;
1975 specs->attrs = NULL_TREE;
1979 /* Declaring one or more declarators or un-named bit-fields. */
1980 struct c_declarator *declarator;
1982 if (c_parser_next_token_is (parser, CPP_COLON))
1983 declarator = build_id_declarator (NULL_TREE);
1985 declarator = c_parser_declarator (parser, specs->type_seen_p,
1986 C_DTR_NORMAL, &dummy);
1987 if (declarator == NULL)
1989 c_parser_skip_to_end_of_block_or_statement (parser);
1992 if (c_parser_next_token_is (parser, CPP_COLON)
1993 || c_parser_next_token_is (parser, CPP_COMMA)
1994 || c_parser_next_token_is (parser, CPP_SEMICOLON)
1995 || c_parser_next_token_is (parser, CPP_CLOSE_BRACE)
1996 || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
1998 tree postfix_attrs = NULL_TREE;
1999 tree width = NULL_TREE;
2001 if (c_parser_next_token_is (parser, CPP_COLON))
2003 c_parser_consume_token (parser);
2004 width = c_parser_expr_no_commas (parser, NULL).value;
2006 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2007 postfix_attrs = c_parser_attributes (parser);
2008 d = grokfield (c_parser_peek_token (parser)->location,
2009 declarator, specs, width, &all_prefix_attrs);
2010 decl_attributes (&d, chainon (postfix_attrs,
2011 all_prefix_attrs), 0);
2012 TREE_CHAIN (d) = decls;
2014 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2015 all_prefix_attrs = chainon (c_parser_attributes (parser),
2018 all_prefix_attrs = prefix_attrs;
2019 if (c_parser_next_token_is (parser, CPP_COMMA))
2020 c_parser_consume_token (parser);
2021 else if (c_parser_next_token_is (parser, CPP_SEMICOLON)
2022 || c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
2024 /* Semicolon consumed in caller. */
2029 c_parser_error (parser, "expected %<,%>, %<;%> or %<}%>");
2035 c_parser_error (parser,
2036 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2037 "%<__attribute__%>");
2044 /* Parse a typeof specifier (a GNU extension).
2047 typeof ( expression )
2048 typeof ( type-name )
2051 static struct c_typespec
2052 c_parser_typeof_specifier (c_parser *parser)
2054 struct c_typespec ret;
2055 ret.kind = ctsk_typeof;
2056 ret.spec = error_mark_node;
2057 gcc_assert (c_parser_next_token_is_keyword (parser, RID_TYPEOF));
2058 c_parser_consume_token (parser);
2061 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2067 if (c_parser_next_token_starts_typename (parser))
2069 struct c_type_name *type = c_parser_type_name (parser);
2074 ret.spec = groktypename (type);
2075 pop_maybe_used (variably_modified_type_p (ret.spec, NULL_TREE));
2081 location_t here = c_parser_peek_token (parser)->location;
2082 struct c_expr expr = c_parser_expression (parser);
2085 if (TREE_CODE (expr.value) == COMPONENT_REF
2086 && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1)))
2087 error ("%H%<typeof%> applied to a bit-field", &here);
2088 ret.spec = TREE_TYPE (expr.value);
2089 was_vm = variably_modified_type_p (ret.spec, NULL_TREE);
2090 /* This should be returned with the type so that when the type
2091 is evaluated, this can be evaluated. For now, we avoid
2092 evaluation when the context might. */
2093 if (!skip_evaluation && was_vm)
2095 tree e = expr.value;
2097 /* If the expression is not of a type to which we cannot assign a line
2098 number, wrap the thing in a no-op NOP_EXPR. */
2099 if (DECL_P (e) || CONSTANT_CLASS_P (e))
2100 e = build1 (NOP_EXPR, void_type_node, e);
2102 if (CAN_HAVE_LOCATION_P (e))
2103 SET_EXPR_LOCATION (e, input_location);
2107 pop_maybe_used (was_vm);
2109 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
2113 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2114 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2115 be redeclared; otherwise it may not. KIND indicates which kind of
2116 declarator is wanted. Returns a valid declarator except in the
2117 case of a syntax error in which case NULL is returned. *SEEN_ID is
2118 set to true if an identifier being declared is seen; this is used
2119 to diagnose bad forms of abstract array declarators and to
2120 determine whether an identifier list is syntactically permitted.
2123 pointer[opt] direct-declarator
2127 ( attributes[opt] declarator )
2128 direct-declarator array-declarator
2129 direct-declarator ( parameter-type-list )
2130 direct-declarator ( identifier-list[opt] )
2133 * type-qualifier-list[opt]
2134 * type-qualifier-list[opt] pointer
2136 type-qualifier-list:
2139 type-qualifier-list type-qualifier
2140 type-qualifier-list attributes
2142 parameter-type-list:
2144 parameter-list , ...
2147 parameter-declaration
2148 parameter-list , parameter-declaration
2150 parameter-declaration:
2151 declaration-specifiers declarator attributes[opt]
2152 declaration-specifiers abstract-declarator[opt] attributes[opt]
2156 identifier-list , identifier
2158 abstract-declarator:
2160 pointer[opt] direct-abstract-declarator
2162 direct-abstract-declarator:
2163 ( attributes[opt] abstract-declarator )
2164 direct-abstract-declarator[opt] array-declarator
2165 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2170 direct-declarator ( parameter-forward-declarations
2171 parameter-type-list[opt] )
2173 direct-abstract-declarator:
2174 direct-abstract-declarator[opt] ( parameter-forward-declarations
2175 parameter-type-list[opt] )
2177 parameter-forward-declarations:
2179 parameter-forward-declarations parameter-list ;
2181 The uses of attributes shown above are GNU extensions.
2183 Some forms of array declarator are not included in C99 in the
2184 syntax for abstract declarators; these are disallowed elsewhere.
2185 This may be a defect (DR#289).
2187 This function also accepts an omitted abstract declarator as being
2188 an abstract declarator, although not part of the formal syntax. */
2190 static struct c_declarator *
2191 c_parser_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind,
2194 /* Parse any initial pointer part. */
2195 if (c_parser_next_token_is (parser, CPP_MULT))
2197 struct c_declspecs *quals_attrs = build_null_declspecs ();
2198 struct c_declarator *inner;
2199 c_parser_consume_token (parser);
2200 c_parser_declspecs (parser, quals_attrs, false, false, true);
2201 inner = c_parser_declarator (parser, type_seen_p, kind, seen_id);
2205 return make_pointer_declarator (quals_attrs, inner);
2207 /* Now we have a direct declarator, direct abstract declarator or
2208 nothing (which counts as a direct abstract declarator here). */
2209 return c_parser_direct_declarator (parser, type_seen_p, kind, seen_id);
2212 /* Parse a direct declarator or direct abstract declarator; arguments
2213 as c_parser_declarator. */
2215 static struct c_declarator *
2216 c_parser_direct_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind,
2219 /* The direct declarator must start with an identifier (possibly
2220 omitted) or a parenthesized declarator (possibly abstract). In
2221 an ordinary declarator, initial parentheses must start a
2222 parenthesized declarator. In an abstract declarator or parameter
2223 declarator, they could start a parenthesized declarator or a
2224 parameter list. To tell which, the open parenthesis and any
2225 following attributes must be read. If a declaration specifier
2226 follows, then it is a parameter list; if the specifier is a
2227 typedef name, there might be an ambiguity about redeclaring it,
2228 which is resolved in the direction of treating it as a typedef
2229 name. If a close parenthesis follows, it is also an empty
2230 parameter list, as the syntax does not permit empty abstract
2231 declarators. Otherwise, it is a parenthesized declarator (in
2232 which case the analysis may be repeated inside it, recursively).
2234 ??? There is an ambiguity in a parameter declaration "int
2235 (__attribute__((foo)) x)", where x is not a typedef name: it
2236 could be an abstract declarator for a function, or declare x with
2237 parentheses. The proper resolution of this ambiguity needs
2238 documenting. At present we follow an accident of the old
2239 parser's implementation, whereby the first parameter must have
2240 some declaration specifiers other than just attributes. Thus as
2241 a parameter declaration it is treated as a parenthesized
2242 parameter named x, and as an abstract declarator it is
2245 ??? Also following the old parser, attributes inside an empty
2246 parameter list are ignored, making it a list not yielding a
2247 prototype, rather than giving an error or making it have one
2248 parameter with implicit type int.
2250 ??? Also following the old parser, typedef names may be
2251 redeclared in declarators, but not Objective-C class names. */
2253 if (kind != C_DTR_ABSTRACT
2254 && c_parser_next_token_is (parser, CPP_NAME)
2256 && c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME)
2257 || c_parser_peek_token (parser)->id_kind == C_ID_ID))
2259 struct c_declarator *inner
2260 = build_id_declarator (c_parser_peek_token (parser)->value);
2262 inner->id_loc = c_parser_peek_token (parser)->location;
2263 c_parser_consume_token (parser);
2264 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2267 if (kind != C_DTR_NORMAL
2268 && c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
2270 struct c_declarator *inner = build_id_declarator (NULL_TREE);
2271 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2274 /* Either we are at the end of an abstract declarator, or we have
2277 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
2280 struct c_declarator *inner;
2281 c_parser_consume_token (parser);
2282 attrs = c_parser_attributes (parser);
2283 if (kind != C_DTR_NORMAL
2284 && (c_parser_next_token_starts_declspecs (parser)
2285 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN)))
2287 struct c_arg_info *args
2288 = c_parser_parms_declarator (parser, kind == C_DTR_NORMAL,
2295 = build_function_declarator (args,
2296 build_id_declarator (NULL_TREE));
2297 return c_parser_direct_declarator_inner (parser, *seen_id,
2301 /* A parenthesized declarator. */
2302 inner = c_parser_declarator (parser, type_seen_p, kind, seen_id);
2303 if (inner != NULL && attrs != NULL)
2304 inner = build_attrs_declarator (attrs, inner);
2305 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2307 c_parser_consume_token (parser);
2311 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2315 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2322 if (kind == C_DTR_NORMAL)
2324 c_parser_error (parser, "expected identifier or %<(%>");
2328 return build_id_declarator (NULL_TREE);
2332 /* Parse part of a direct declarator or direct abstract declarator,
2333 given that some (in INNER) has already been parsed; ID_PRESENT is
2334 true if an identifier is present, false for an abstract
2337 static struct c_declarator *
2338 c_parser_direct_declarator_inner (c_parser *parser, bool id_present,
2339 struct c_declarator *inner)
2341 /* Parse a sequence of array declarators and parameter lists. */
2342 if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
2344 struct c_declarator *declarator;
2345 struct c_declspecs *quals_attrs = build_null_declspecs ();
2349 c_parser_consume_token (parser);
2350 c_parser_declspecs (parser, quals_attrs, false, false, true);
2351 static_seen = c_parser_next_token_is_keyword (parser, RID_STATIC);
2353 c_parser_consume_token (parser);
2354 if (static_seen && !quals_attrs->declspecs_seen_p)
2355 c_parser_declspecs (parser, quals_attrs, false, false, true);
2356 if (!quals_attrs->declspecs_seen_p)
2358 /* If "static" is present, there must be an array dimension.
2359 Otherwise, there may be a dimension, "*", or no
2364 dimen = c_parser_expr_no_commas (parser, NULL).value;
2368 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
2373 else if (c_parser_next_token_is (parser, CPP_MULT))
2375 if (c_parser_peek_2nd_token (parser)->type == CPP_CLOSE_SQUARE)
2379 c_parser_consume_token (parser);
2384 dimen = c_parser_expr_no_commas (parser, NULL).value;
2390 dimen = c_parser_expr_no_commas (parser, NULL).value;
2393 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
2394 c_parser_consume_token (parser);
2397 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
2401 declarator = build_array_declarator (dimen, quals_attrs, static_seen,
2403 if (declarator == NULL)
2405 inner = set_array_declarator_inner (declarator, inner);
2406 return c_parser_direct_declarator_inner (parser, id_present, inner);
2408 else if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
2411 struct c_arg_info *args;
2412 c_parser_consume_token (parser);
2413 attrs = c_parser_attributes (parser);
2414 args = c_parser_parms_declarator (parser, id_present, attrs);
2419 inner = build_function_declarator (args, inner);
2420 return c_parser_direct_declarator_inner (parser, id_present, inner);
2426 /* Parse a parameter list or identifier list, including the closing
2427 parenthesis but not the opening one. ATTRS are the attributes at
2428 the start of the list. ID_LIST_OK is true if an identifier list is
2429 acceptable; such a list must not have attributes at the start. */
2431 static struct c_arg_info *
2432 c_parser_parms_declarator (c_parser *parser, bool id_list_ok, tree attrs)
2435 declare_parm_level ();
2436 /* If the list starts with an identifier, it is an identifier list.
2437 Otherwise, it is either a prototype list or an empty list. */
2440 && c_parser_next_token_is (parser, CPP_NAME)
2441 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
2443 tree list = NULL_TREE, *nextp = &list;
2444 while (c_parser_next_token_is (parser, CPP_NAME)
2445 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
2447 *nextp = build_tree_list (NULL_TREE,
2448 c_parser_peek_token (parser)->value);
2449 nextp = & TREE_CHAIN (*nextp);
2450 c_parser_consume_token (parser);
2451 if (c_parser_next_token_is_not (parser, CPP_COMMA))
2453 c_parser_consume_token (parser);
2454 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2456 c_parser_error (parser, "expected identifier");
2460 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2462 struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
2467 ret->pending_sizes = 0;
2468 ret->had_vla_unspec = 0;
2469 c_parser_consume_token (parser);
2475 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2483 struct c_arg_info *ret = c_parser_parms_list_declarator (parser, attrs);
2489 /* Parse a parameter list (possibly empty), including the closing
2490 parenthesis but not the opening one. ATTRS are the attributes at
2491 the start of the list. */
2493 static struct c_arg_info *
2494 c_parser_parms_list_declarator (c_parser *parser, tree attrs)
2496 bool good_parm = false;
2497 /* ??? Following the old parser, forward parameter declarations may
2498 use abstract declarators, and if no real parameter declarations
2499 follow the forward declarations then this is not diagnosed. Also
2500 note as above that attributes are ignored as the only contents of
2501 the parentheses, or as the only contents after forward
2503 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2505 struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
2510 ret->pending_sizes = 0;
2511 ret->had_vla_unspec = 0;
2512 c_parser_consume_token (parser);
2515 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
2517 struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
2521 ret->pending_sizes = 0;
2522 ret->had_vla_unspec = 0;
2523 /* Suppress -Wold-style-definition for this case. */
2524 ret->types = error_mark_node;
2525 error ("%HISO C requires a named argument before %<...%>",
2526 &c_parser_peek_token (parser)->location);
2527 c_parser_consume_token (parser);
2528 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2530 c_parser_consume_token (parser);
2535 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2540 /* Nonempty list of parameters, either terminated with semicolon
2541 (forward declarations; recurse) or with close parenthesis (normal
2542 function) or with ", ... )" (variadic function). */
2545 /* Parse a parameter. */
2546 struct c_parm *parm = c_parser_parameter_declaration (parser, attrs);
2551 push_parm_decl (parm);
2553 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
2556 c_parser_consume_token (parser);
2557 mark_forward_parm_decls ();
2558 new_attrs = c_parser_attributes (parser);
2559 return c_parser_parms_list_declarator (parser, new_attrs);
2561 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2563 c_parser_consume_token (parser);
2565 return get_parm_info (false);
2568 struct c_arg_info *ret
2569 = XOBNEW (&parser_obstack, struct c_arg_info);
2574 ret->pending_sizes = 0;
2575 ret->had_vla_unspec = 0;
2579 if (!c_parser_require (parser, CPP_COMMA,
2580 "expected %<;%>, %<,%> or %<)%>"))
2582 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
2585 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
2587 c_parser_consume_token (parser);
2588 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2590 c_parser_consume_token (parser);
2592 return get_parm_info (true);
2595 struct c_arg_info *ret
2596 = XOBNEW (&parser_obstack, struct c_arg_info);
2601 ret->pending_sizes = 0;
2602 ret->had_vla_unspec = 0;
2608 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
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 ("%Hwide string literal in %<asm%>",
2683 &c_parser_peek_token (parser)->location);
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 %<}%>");
3041 c_parser_consume_token (parser);
3042 return pop_init_level (0);
3045 /* Parse a nested initializer, including designators. */
3048 c_parser_initelt (c_parser *parser)
3050 /* Parse any designator or designator list. A single array
3051 designator may have the subsequent "=" omitted in GNU C, but a
3052 longer list or a structure member designator may not. */
3053 if (c_parser_next_token_is (parser, CPP_NAME)
3054 && c_parser_peek_2nd_token (parser)->type == CPP_COLON)
3056 /* Old-style structure member designator. */
3057 set_init_label (c_parser_peek_token (parser)->value);
3058 /* Use the colon as the error location. */
3059 pedwarn (c_parser_peek_2nd_token (parser)->location, OPT_pedantic,
3060 "obsolete use of designated initializer with %<:%>");
3061 c_parser_consume_token (parser);
3062 c_parser_consume_token (parser);
3066 /* des_seen is 0 if there have been no designators, 1 if there
3067 has been a single array designator and 2 otherwise. */
3069 /* Location of a designator. */
3071 while (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)
3072 || c_parser_next_token_is (parser, CPP_DOT))
3074 int des_prev = des_seen;
3076 des_loc = c_parser_peek_token (parser)->location;
3079 if (c_parser_next_token_is (parser, CPP_DOT))
3082 c_parser_consume_token (parser);
3083 if (c_parser_next_token_is (parser, CPP_NAME))
3085 set_init_label (c_parser_peek_token (parser)->value);
3086 c_parser_consume_token (parser);
3091 init.value = error_mark_node;
3092 init.original_code = ERROR_MARK;
3093 c_parser_error (parser, "expected identifier");
3094 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
3095 process_init_element (init);
3102 location_t ellipsis_loc;
3103 /* ??? Following the old parser, [ objc-receiver
3104 objc-message-args ] is accepted as an initializer,
3105 being distinguished from a designator by what follows
3106 the first assignment expression inside the square
3107 brackets, but after a first array designator a
3108 subsequent square bracket is for Objective-C taken to
3109 start an expression, using the obsolete form of
3110 designated initializer without '=', rather than
3111 possibly being a second level of designation: in LALR
3112 terms, the '[' is shifted rather than reducing
3113 designator to designator-list. */
3114 if (des_prev == 1 && c_dialect_objc ())
3116 des_seen = des_prev;
3119 if (des_prev == 0 && c_dialect_objc ())
3121 /* This might be an array designator or an
3122 Objective-C message expression. If the former,
3123 continue parsing here; if the latter, parse the
3124 remainder of the initializer given the starting
3125 primary-expression. ??? It might make sense to
3126 distinguish when des_prev == 1 as well; see
3127 previous comment. */
3129 struct c_expr mexpr;
3130 c_parser_consume_token (parser);
3131 if (c_parser_peek_token (parser)->type == CPP_NAME
3132 && ((c_parser_peek_token (parser)->id_kind
3134 || (c_parser_peek_token (parser)->id_kind
3135 == C_ID_CLASSNAME)))
3137 /* Type name receiver. */
3138 tree id = c_parser_peek_token (parser)->value;
3139 c_parser_consume_token (parser);
3140 rec = objc_get_class_reference (id);
3141 goto parse_message_args;
3143 first = c_parser_expr_no_commas (parser, NULL).value;
3144 if (c_parser_next_token_is (parser, CPP_ELLIPSIS)
3145 || c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
3146 goto array_desig_after_first;
3147 /* Expression receiver. So far only one part
3148 without commas has been parsed; there might be
3149 more of the expression. */
3151 while (c_parser_next_token_is (parser, CPP_COMMA))
3154 c_parser_consume_token (parser);
3155 next = c_parser_expr_no_commas (parser, NULL);
3156 next = default_function_array_conversion (next);
3157 rec = build_compound_expr (rec, next.value);
3160 /* Now parse the objc-message-args. */
3161 args = c_parser_objc_message_args (parser);
3162 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
3165 = objc_build_message_expr (build_tree_list (rec, args));
3166 mexpr.original_code = ERROR_MARK;
3167 /* Now parse and process the remainder of the
3168 initializer, starting with this message
3169 expression as a primary-expression. */
3170 c_parser_initval (parser, &mexpr);
3173 c_parser_consume_token (parser);
3174 first = c_parser_expr_no_commas (parser, NULL).value;
3175 array_desig_after_first:
3176 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
3178 ellipsis_loc = c_parser_peek_token (parser)->location;
3179 c_parser_consume_token (parser);
3180 second = c_parser_expr_no_commas (parser, NULL).value;
3184 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
3186 c_parser_consume_token (parser);
3187 set_init_index (first, second);
3189 pedwarn (ellipsis_loc, OPT_pedantic,
3190 "ISO C forbids specifying range of elements to initialize");
3193 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
3199 if (c_parser_next_token_is (parser, CPP_EQ))
3202 pedwarn (des_loc, OPT_pedantic,
3203 "ISO C90 forbids specifying subobject to initialize");
3204 c_parser_consume_token (parser);
3209 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
3210 "obsolete use of designated initializer without %<=%>");
3214 init.value = error_mark_node;
3215 init.original_code = ERROR_MARK;
3216 c_parser_error (parser, "expected %<=%>");
3217 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
3218 process_init_element (init);
3224 c_parser_initval (parser, NULL);
3227 /* Parse a nested initializer; as c_parser_initializer but parses
3228 initializers within braced lists, after any designators have been
3229 applied. If AFTER is not NULL then it is an Objective-C message
3230 expression which is the primary-expression starting the
3234 c_parser_initval (c_parser *parser, struct c_expr *after)
3237 gcc_assert (!after || c_dialect_objc ());
3238 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE) && !after)
3239 init = c_parser_braced_init (parser, NULL_TREE, true);
3242 init = c_parser_expr_no_commas (parser, after);
3243 if (init.value != NULL_TREE
3244 && TREE_CODE (init.value) != STRING_CST
3245 && TREE_CODE (init.value) != COMPOUND_LITERAL_EXPR)
3246 init = default_function_array_conversion (init);
3248 process_init_element (init);
3251 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3255 { block-item-list[opt] }
3256 { label-declarations block-item-list }
3260 block-item-list block-item
3272 { label-declarations block-item-list }
3275 __extension__ nested-declaration
3276 nested-function-definition
3280 label-declarations label-declaration
3283 __label__ identifier-list ;
3285 Allowing the mixing of declarations and code is new in C99. The
3286 GNU syntax also permits (not shown above) labels at the end of
3287 compound statements, which yield an error. We don't allow labels
3288 on declarations; this might seem like a natural extension, but
3289 there would be a conflict between attributes on the label and
3290 prefix attributes on the declaration. ??? The syntax follows the
3291 old parser in requiring something after label declarations.
3292 Although they are erroneous if the labels declared aren't defined,
3293 is it useful for the syntax to be this way?
3305 c_parser_compound_statement (c_parser *parser)
3308 if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
3309 return error_mark_node;
3310 stmt = c_begin_compound_stmt (true);
3311 c_parser_compound_statement_nostart (parser);
3312 return c_end_compound_stmt (stmt, true);
3315 /* Parse a compound statement except for the opening brace. This is
3316 used for parsing both compound statements and statement expressions
3317 (which follow different paths to handling the opening). */
3320 c_parser_compound_statement_nostart (c_parser *parser)
3322 bool last_stmt = false;
3323 bool last_label = false;
3324 location_t label_loc;
3325 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3327 c_parser_consume_token (parser);
3330 if (c_parser_next_token_is_keyword (parser, RID_LABEL))
3332 location_t err_loc = c_parser_peek_token (parser)->location;
3333 /* Read zero or more forward-declarations for labels that nested
3334 functions can jump to. */
3335 while (c_parser_next_token_is_keyword (parser, RID_LABEL))
3337 c_parser_consume_token (parser);
3338 /* Any identifiers, including those declared as type names,
3343 if (c_parser_next_token_is_not (parser, CPP_NAME))
3345 c_parser_error (parser, "expected identifier");
3349 = declare_label (c_parser_peek_token (parser)->value);
3350 C_DECLARED_LABEL_FLAG (label) = 1;
3351 add_stmt (build_stmt (DECL_EXPR, label));
3352 c_parser_consume_token (parser);
3353 if (c_parser_next_token_is (parser, CPP_COMMA))
3354 c_parser_consume_token (parser);
3358 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
3360 pedwarn (err_loc, OPT_pedantic, "ISO C forbids label declarations");
3362 /* We must now have at least one statement, label or declaration. */
3363 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3365 c_parser_error (parser, "expected declaration or statement");
3366 c_parser_consume_token (parser);
3369 while (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE))
3371 location_t loc = c_parser_peek_token (parser)->location;
3372 if (c_parser_next_token_is_keyword (parser, RID_CASE)
3373 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3374 || (c_parser_next_token_is (parser, CPP_NAME)
3375 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3377 if (c_parser_next_token_is_keyword (parser, RID_CASE))
3378 label_loc = c_parser_peek_2nd_token (parser)->location;
3380 label_loc = c_parser_peek_token (parser)->location;
3383 c_parser_label (parser);
3385 else if (!last_label
3386 && c_parser_next_token_starts_declspecs (parser))
3389 c_parser_declaration_or_fndef (parser, true, true, true, true);
3392 (pedantic && !flag_isoc99)
3394 : OPT_Wdeclaration_after_statement,
3395 "ISO C90 forbids mixed declarations and code");
3398 else if (!last_label
3399 && c_parser_next_token_is_keyword (parser, RID_EXTENSION))
3401 /* __extension__ can start a declaration, but is also an
3402 unary operator that can start an expression. Consume all
3403 but the last of a possible series of __extension__ to
3405 while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD
3406 && (c_parser_peek_2nd_token (parser)->keyword
3408 c_parser_consume_token (parser);
3409 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser)))
3412 ext = disable_extension_diagnostics ();
3413 c_parser_consume_token (parser);
3415 c_parser_declaration_or_fndef (parser, true, true, true, true);
3416 /* Following the old parser, __extension__ does not
3417 disable this diagnostic. */
3418 restore_extension_diagnostics (ext);
3420 pedwarn_c90 (loc, (pedantic && !flag_isoc99)
3422 : OPT_Wdeclaration_after_statement,
3423 "ISO C90 forbids mixed declarations and code");
3429 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
3431 /* External pragmas, and some omp pragmas, are not associated
3432 with regular c code, and so are not to be considered statements
3433 syntactically. This ensures that the user doesn't put them
3434 places that would turn into syntax errors if the directive
3436 if (c_parser_pragma (parser, pragma_compound))
3437 last_label = false, last_stmt = true;
3439 else if (c_parser_next_token_is (parser, CPP_EOF))
3441 c_parser_error (parser, "expected declaration or statement");
3444 else if (c_parser_next_token_is_keyword (parser, RID_ELSE))
3446 if (parser->in_if_block)
3448 error ("%H""expected %<}%> before %<else%>", &loc);
3453 error ("%H%<else%> without a previous %<if%>", &loc);
3454 c_parser_consume_token (parser);
3463 c_parser_statement_after_labels (parser);
3466 parser->error = false;
3469 error ("%Hlabel at end of compound statement", &label_loc);
3470 c_parser_consume_token (parser);
3473 /* Parse a label (C90 6.6.1, C99 6.8.1).
3476 identifier : attributes[opt]
3477 case constant-expression :
3483 case constant-expression ... constant-expression :
3485 The use of attributes on labels is a GNU extension. The syntax in
3486 GNU C accepts any expressions without commas, non-constant
3487 expressions being rejected later. */
3490 c_parser_label (c_parser *parser)
3492 location_t loc1 = c_parser_peek_token (parser)->location;
3493 tree label = NULL_TREE;
3494 if (c_parser_next_token_is_keyword (parser, RID_CASE))
3497 c_parser_consume_token (parser);
3498 exp1 = c_parser_expr_no_commas (parser, NULL).value;
3499 if (c_parser_next_token_is (parser, CPP_COLON))
3501 c_parser_consume_token (parser);
3502 label = do_case (exp1, NULL_TREE);
3504 else if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
3506 c_parser_consume_token (parser);
3507 exp2 = c_parser_expr_no_commas (parser, NULL).value;
3508 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
3509 label = do_case (exp1, exp2);
3512 c_parser_error (parser, "expected %<:%> or %<...%>");
3514 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
3516 c_parser_consume_token (parser);
3517 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
3518 label = do_case (NULL_TREE, NULL_TREE);
3522 tree name = c_parser_peek_token (parser)->value;
3525 location_t loc2 = c_parser_peek_token (parser)->location;
3526 gcc_assert (c_parser_next_token_is (parser, CPP_NAME));
3527 c_parser_consume_token (parser);
3528 gcc_assert (c_parser_next_token_is (parser, CPP_COLON));
3529 c_parser_consume_token (parser);
3530 attrs = c_parser_attributes (parser);
3531 tlab = define_label (loc2, name);
3534 decl_attributes (&tlab, attrs, 0);
3535 label = add_stmt (build_stmt (LABEL_EXPR, tlab));
3540 SET_EXPR_LOCATION (label, loc1);
3541 if (c_parser_next_token_starts_declspecs (parser)
3542 && !(c_parser_next_token_is (parser, CPP_NAME)
3543 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3545 error ("%Ha label can only be part of a statement and "
3546 "a declaration is not a statement",
3547 &c_parser_peek_token (parser)->location);
3548 c_parser_declaration_or_fndef (parser, /*fndef_ok*/ false,
3549 /*nested*/ true, /*empty_ok*/ false,
3550 /*start_attr_ok*/ true);
3555 /* Parse a statement (C90 6.6, C99 6.8).
3560 expression-statement
3568 expression-statement:
3571 selection-statement:
3575 iteration-statement:
3584 return expression[opt] ;
3597 objc-throw-statement
3598 objc-try-catch-statement
3599 objc-synchronized-statement
3601 objc-throw-statement:
3615 parallel-for-construct
3616 parallel-sections-construct
3623 parallel-directive structured-block
3626 for-directive iteration-statement
3629 sections-directive section-scope
3632 single-directive structured-block
3634 parallel-for-construct:
3635 parallel-for-directive iteration-statement
3637 parallel-sections-construct:
3638 parallel-sections-directive section-scope
3641 master-directive structured-block
3644 critical-directive structured-block
3647 atomic-directive expression-statement
3650 ordered-directive structured-block */
3653 c_parser_statement (c_parser *parser)
3655 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3656 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3657 || (c_parser_next_token_is (parser, CPP_NAME)
3658 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3659 c_parser_label (parser);
3660 c_parser_statement_after_labels (parser);
3663 /* Parse a statement, other than a labeled statement. */
3666 c_parser_statement_after_labels (c_parser *parser)
3668 location_t loc = c_parser_peek_token (parser)->location;
3669 tree stmt = NULL_TREE;
3670 bool in_if_block = parser->in_if_block;
3671 parser->in_if_block = false;
3672 switch (c_parser_peek_token (parser)->type)
3674 case CPP_OPEN_BRACE:
3675 add_stmt (c_parser_compound_statement (parser));
3678 switch (c_parser_peek_token (parser)->keyword)
3681 c_parser_if_statement (parser);
3684 c_parser_switch_statement (parser);
3687 c_parser_while_statement (parser);
3690 c_parser_do_statement (parser);
3693 c_parser_for_statement (parser);
3696 c_parser_consume_token (parser);
3697 if (c_parser_next_token_is (parser, CPP_NAME))
3699 stmt = c_finish_goto_label (c_parser_peek_token (parser)->value);
3700 c_parser_consume_token (parser);
3702 else if (c_parser_next_token_is (parser, CPP_MULT))
3704 c_parser_consume_token (parser);
3705 stmt = c_finish_goto_ptr (c_parser_expression (parser).value);
3708 c_parser_error (parser, "expected identifier or %<*%>");
3709 goto expect_semicolon;
3711 c_parser_consume_token (parser);
3712 stmt = c_finish_bc_stmt (&c_cont_label, false);
3713 goto expect_semicolon;
3715 c_parser_consume_token (parser);
3716 stmt = c_finish_bc_stmt (&c_break_label, true);
3717 goto expect_semicolon;
3719 c_parser_consume_token (parser);
3720 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3722 stmt = c_finish_return (NULL_TREE);
3723 c_parser_consume_token (parser);
3727 stmt = c_finish_return (c_parser_expression_conv (parser).value);
3728 goto expect_semicolon;
3732 stmt = c_parser_asm_statement (parser);
3735 gcc_assert (c_dialect_objc ());
3736 c_parser_consume_token (parser);
3737 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3739 stmt = objc_build_throw_stmt (NULL_TREE);
3740 c_parser_consume_token (parser);
3745 = objc_build_throw_stmt (c_parser_expression (parser).value);
3746 goto expect_semicolon;
3750 gcc_assert (c_dialect_objc ());
3751 c_parser_objc_try_catch_statement (parser);
3753 case RID_AT_SYNCHRONIZED:
3754 gcc_assert (c_dialect_objc ());
3755 c_parser_objc_synchronized_statement (parser);
3762 c_parser_consume_token (parser);
3764 case CPP_CLOSE_PAREN:
3765 case CPP_CLOSE_SQUARE:
3766 /* Avoid infinite loop in error recovery:
3767 c_parser_skip_until_found stops at a closing nesting
3768 delimiter without consuming it, but here we need to consume
3769 it to proceed further. */
3770 c_parser_error (parser, "expected statement");
3771 c_parser_consume_token (parser);
3774 c_parser_pragma (parser, pragma_stmt);
3778 stmt = c_finish_expr_stmt (c_parser_expression_conv (parser).value);
3780 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
3783 /* Two cases cannot and do not have line numbers associated: If stmt
3784 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3785 cannot hold line numbers. But that's OK because the statement
3786 will either be changed to a MODIFY_EXPR during gimplification of
3787 the statement expr, or discarded. If stmt was compound, but
3788 without new variables, we will have skipped the creation of a
3789 BIND and will have a bare STATEMENT_LIST. But that's OK because
3790 (recursively) all of the component statements should already have
3791 line numbers assigned. ??? Can we discard no-op statements
3793 if (stmt && CAN_HAVE_LOCATION_P (stmt))
3794 SET_EXPR_LOCATION (stmt, loc);
3796 parser->in_if_block = in_if_block;
3799 /* Parse the condition from an if, do, while or for statements. */
3802 c_parser_condition (c_parser *parser)
3806 loc = c_parser_peek_token (parser)->location;
3807 cond = c_objc_common_truthvalue_conversion
3808 (loc, c_parser_expression_conv (parser).value);
3809 if (CAN_HAVE_LOCATION_P (cond))
3810 SET_EXPR_LOCATION (cond, loc);
3811 if (warn_sequence_point)
3812 verify_sequence_points (cond);
3816 /* Parse a parenthesized condition from an if, do or while statement.
3822 c_parser_paren_condition (c_parser *parser)
3825 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3826 return error_mark_node;
3827 cond = c_parser_condition (parser);
3828 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
3832 /* Parse a statement which is a block in C99. */
3835 c_parser_c99_block_statement (c_parser *parser)
3837 tree block = c_begin_compound_stmt (flag_isoc99);
3838 c_parser_statement (parser);
3839 return c_end_compound_stmt (block, flag_isoc99);
3842 /* Parse the body of an if statement. This is just parsing a
3843 statement but (a) it is a block in C99, (b) we track whether the
3844 body is an if statement for the sake of -Wparentheses warnings, (c)
3845 we handle an empty body specially for the sake of -Wempty-body
3846 warnings, and (d) we call parser_compound_statement directly
3847 because c_parser_statement_after_labels resets
3848 parser->in_if_block. */
3851 c_parser_if_body (c_parser *parser, bool *if_p)
3853 tree block = c_begin_compound_stmt (flag_isoc99);
3854 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3855 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3856 || (c_parser_next_token_is (parser, CPP_NAME)
3857 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3858 c_parser_label (parser);
3859 *if_p = c_parser_next_token_is_keyword (parser, RID_IF);
3860 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3862 add_stmt (build_empty_stmt ());
3863 c_parser_consume_token (parser);
3865 else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
3866 add_stmt (c_parser_compound_statement (parser));
3868 c_parser_statement_after_labels (parser);
3869 return c_end_compound_stmt (block, flag_isoc99);
3872 /* Parse the else body of an if statement. This is just parsing a
3873 statement but (a) it is a block in C99, (b) we handle an empty body
3874 specially for the sake of -Wempty-body warnings. */
3877 c_parser_else_body (c_parser *parser)
3879 tree block = c_begin_compound_stmt (flag_isoc99);
3880 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3881 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3882 || (c_parser_next_token_is (parser, CPP_NAME)
3883 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3884 c_parser_label (parser);
3885 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3887 add_stmt (build_empty_stmt ());
3888 c_parser_consume_token (parser);
3891 c_parser_statement_after_labels (parser);
3892 return c_end_compound_stmt (block, flag_isoc99);
3895 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3898 if ( expression ) statement
3899 if ( expression ) statement else statement
3903 c_parser_if_statement (c_parser *parser)
3908 bool first_if = false;
3909 tree first_body, second_body;
3912 gcc_assert (c_parser_next_token_is_keyword (parser, RID_IF));
3913 c_parser_consume_token (parser);
3914 block = c_begin_compound_stmt (flag_isoc99);
3915 loc = c_parser_peek_token (parser)->location;
3916 cond = c_parser_paren_condition (parser);
3917 in_if_block = parser->in_if_block;
3918 parser->in_if_block = true;
3919 first_body = c_parser_if_body (parser, &first_if);
3920 parser->in_if_block = in_if_block;
3921 if (c_parser_next_token_is_keyword (parser, RID_ELSE))
3923 c_parser_consume_token (parser);
3924 second_body = c_parser_else_body (parser);
3927 second_body = NULL_TREE;
3928 c_finish_if_stmt (loc, cond, first_body, second_body, first_if);
3929 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3932 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3935 switch (expression) statement
3939 c_parser_switch_statement (c_parser *parser)
3941 tree block, expr, body, save_break;
3942 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SWITCH));
3943 c_parser_consume_token (parser);
3944 block = c_begin_compound_stmt (flag_isoc99);
3945 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3947 expr = c_parser_expression (parser).value;
3948 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
3951 expr = error_mark_node;
3952 c_start_case (expr);
3953 save_break = c_break_label;
3954 c_break_label = NULL_TREE;
3955 body = c_parser_c99_block_statement (parser);
3956 c_finish_case (body);
3958 add_stmt (build1 (LABEL_EXPR, void_type_node, c_break_label));
3959 c_break_label = save_break;
3960 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3963 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
3966 while (expression) statement
3970 c_parser_while_statement (c_parser *parser)
3972 tree block, cond, body, save_break, save_cont;
3974 gcc_assert (c_parser_next_token_is_keyword (parser, RID_WHILE));
3975 c_parser_consume_token (parser);
3976 block = c_begin_compound_stmt (flag_isoc99);
3977 loc = c_parser_peek_token (parser)->location;
3978 cond = c_parser_paren_condition (parser);
3979 save_break = c_break_label;
3980 c_break_label = NULL_TREE;
3981 save_cont = c_cont_label;
3982 c_cont_label = NULL_TREE;
3983 body = c_parser_c99_block_statement (parser);
3984 c_finish_loop (loc, cond, NULL, body, c_break_label, c_cont_label, true);
3985 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3986 c_break_label = save_break;
3987 c_cont_label = save_cont;
3990 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
3993 do statement while ( expression ) ;
3997 c_parser_do_statement (c_parser *parser)
3999 tree block, cond, body, save_break, save_cont, new_break, new_cont;
4001 gcc_assert (c_parser_next_token_is_keyword (parser, RID_DO));
4002 c_parser_consume_token (parser);
4003 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4004 warning (OPT_Wempty_body,
4005 "%Hsuggest braces around empty body in %<do%> statement",
4006 &c_parser_peek_token (parser)->location);
4007 block = c_begin_compound_stmt (flag_isoc99);
4008 loc = c_parser_peek_token (parser)->location;
4009 save_break = c_break_label;
4010 c_break_label = NULL_TREE;
4011 save_cont = c_cont_label;
4012 c_cont_label = NULL_TREE;
4013 body = c_parser_c99_block_statement (parser);
4014 c_parser_require_keyword (parser, RID_WHILE, "expected %<while%>");
4015 new_break = c_break_label;
4016 c_break_label = save_break;
4017 new_cont = c_cont_label;
4018 c_cont_label = save_cont;
4019 cond = c_parser_paren_condition (parser);
4020 if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
4021 c_parser_skip_to_end_of_block_or_statement (parser);
4022 c_finish_loop (loc, cond, NULL, body, new_break, new_cont, false);
4023 add_stmt (c_end_compound_stmt (block, flag_isoc99));
4026 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4029 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4030 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4032 The form with a declaration is new in C99.
4034 ??? In accordance with the old parser, the declaration may be a
4035 nested function, which is then rejected in check_for_loop_decls,
4036 but does it make any sense for this to be included in the grammar?
4037 Note in particular that the nested function does not include a
4038 trailing ';', whereas the "declaration" production includes one.
4039 Also, can we reject bad declarations earlier and cheaper than
4040 check_for_loop_decls? */
4043 c_parser_for_statement (c_parser *parser)
4045 tree block, cond, incr, save_break, save_cont, body;
4047 gcc_assert (c_parser_next_token_is_keyword (parser, RID_FOR));
4048 loc = c_parser_peek_token (parser)->location;
4049 c_parser_consume_token (parser);
4050 block = c_begin_compound_stmt (flag_isoc99);
4051 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4053 /* Parse the initialization declaration or expression. */
4054 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4056 c_parser_consume_token (parser);
4057 c_finish_expr_stmt (NULL_TREE);
4059 else if (c_parser_next_token_starts_declspecs (parser))
4061 c_parser_declaration_or_fndef (parser, true, true, true, true);
4062 check_for_loop_decls ();
4064 else if (c_parser_next_token_is_keyword (parser, RID_EXTENSION))
4066 /* __extension__ can start a declaration, but is also an
4067 unary operator that can start an expression. Consume all
4068 but the last of a possible series of __extension__ to
4070 while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD
4071 && (c_parser_peek_2nd_token (parser)->keyword
4073 c_parser_consume_token (parser);
4074 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser)))
4077 ext = disable_extension_diagnostics ();
4078 c_parser_consume_token (parser);
4079 c_parser_declaration_or_fndef (parser, true, true, true, true);
4080 restore_extension_diagnostics (ext);
4081 check_for_loop_decls ();
4089 c_finish_expr_stmt (c_parser_expression (parser).value);
4090 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4092 /* Parse the loop condition. */
4093 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4095 c_parser_consume_token (parser);
4100 cond = c_parser_condition (parser);
4101 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4103 /* Parse the increment expression. */
4104 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4105 incr = c_process_expr_stmt (NULL_TREE);
4107 incr = c_process_expr_stmt (c_parser_expression (parser).value);
4108 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4112 cond = error_mark_node;
4113 incr = error_mark_node;
4115 save_break = c_break_label;
4116 c_break_label = NULL_TREE;
4117 save_cont = c_cont_label;
4118 c_cont_label = NULL_TREE;
4119 body = c_parser_c99_block_statement (parser);
4120 c_finish_loop (loc, cond, incr, body, c_break_label, c_cont_label, true);
4121 add_stmt (c_end_compound_stmt (block, flag_isoc99));
4122 c_break_label = save_break;
4123 c_cont_label = save_cont;
4126 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4127 statement with inputs, outputs, clobbers, and volatile tag
4131 asm type-qualifier[opt] ( asm-argument ) ;
4135 asm-string-literal : asm-operands[opt]
4136 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4137 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4139 Qualifiers other than volatile are accepted in the syntax but
4143 c_parser_asm_statement (c_parser *parser)
4145 tree quals, str, outputs, inputs, clobbers, ret;
4147 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM));
4148 c_parser_consume_token (parser);
4149 if (c_parser_next_token_is_keyword (parser, RID_VOLATILE))
4151 quals = c_parser_peek_token (parser)->value;
4152 c_parser_consume_token (parser);
4154 else if (c_parser_next_token_is_keyword (parser, RID_CONST)
4155 || c_parser_next_token_is_keyword (parser, RID_RESTRICT))
4157 warning (0, "%H%E qualifier ignored on asm",
4158 &c_parser_peek_token (parser)->location,
4159 c_parser_peek_token (parser)->value);
4161 c_parser_consume_token (parser);
4165 /* ??? Follow the C++ parser rather than using the
4166 lex_untranslated_string kludge. */
4167 parser->lex_untranslated_string = true;
4168 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4170 parser->lex_untranslated_string = false;
4173 str = c_parser_asm_string_literal (parser);
4174 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4177 outputs = NULL_TREE;
4179 clobbers = NULL_TREE;
4182 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4184 parser->lex_untranslated_string = false;
4185 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4189 /* Parse outputs. */
4190 if (c_parser_next_token_is (parser, CPP_COLON)
4191 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4192 outputs = NULL_TREE;
4194 outputs = c_parser_asm_operands (parser, false);
4195 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4198 clobbers = NULL_TREE;
4201 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4203 parser->lex_untranslated_string = false;
4204 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4208 if (c_parser_next_token_is (parser, CPP_COLON)
4209 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4212 inputs = c_parser_asm_operands (parser, true);
4213 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4215 clobbers = NULL_TREE;
4218 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4220 parser->lex_untranslated_string = false;
4221 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4224 /* Parse clobbers. */
4225 clobbers = c_parser_asm_clobbers (parser);
4227 parser->lex_untranslated_string = false;
4228 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
4230 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4233 if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
4234 c_parser_skip_to_end_of_block_or_statement (parser);
4235 ret = build_asm_stmt (quals, build_asm_expr (str, outputs, inputs,
4240 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4241 not outputs), apply the default conversion of functions and arrays
4246 asm-operands , asm-operand
4249 asm-string-literal ( expression )
4250 [ identifier ] asm-string-literal ( expression )
4254 c_parser_asm_operands (c_parser *parser, bool convert_p)
4256 tree list = NULL_TREE;
4261 if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
4263 c_parser_consume_token (parser);
4264 if (c_parser_next_token_is (parser, CPP_NAME))
4266 tree id = c_parser_peek_token (parser)->value;
4267 c_parser_consume_token (parser);
4268 name = build_string (IDENTIFIER_LENGTH (id),
4269 IDENTIFIER_POINTER (id));
4273 c_parser_error (parser, "expected identifier");
4274 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, NULL);
4277 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
4282 str = c_parser_asm_string_literal (parser);
4283 if (str == NULL_TREE)
4285 parser->lex_untranslated_string = false;
4286 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4288 parser->lex_untranslated_string = true;
4291 expr = c_parser_expression (parser);
4293 expr = default_function_array_conversion (expr);
4294 parser->lex_untranslated_string = true;
4295 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
4297 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4300 list = chainon (list, build_tree_list (build_tree_list (name, str),
4302 if (c_parser_next_token_is (parser, CPP_COMMA))
4303 c_parser_consume_token (parser);
4310 /* Parse asm clobbers, a GNU extension.
4314 asm-clobbers , asm-string-literal
4318 c_parser_asm_clobbers (c_parser *parser)
4320 tree list = NULL_TREE;
4323 tree str = c_parser_asm_string_literal (parser);
4325 list = tree_cons (NULL_TREE, str, list);
4328 if (c_parser_next_token_is (parser, CPP_COMMA))
4329 c_parser_consume_token (parser);
4336 /* Parse an expression other than a compound expression; that is, an
4337 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4338 NULL then it is an Objective-C message expression which is the
4339 primary-expression starting the expression as an initializer.
4341 assignment-expression:
4342 conditional-expression
4343 unary-expression assignment-operator assignment-expression
4345 assignment-operator: one of
4346 = *= /= %= += -= <<= >>= &= ^= |=
4348 In GNU C we accept any conditional expression on the LHS and
4349 diagnose the invalid lvalue rather than producing a syntax
4352 static struct c_expr
4353 c_parser_expr_no_commas (c_parser *parser, struct c_expr *after)
4355 struct c_expr lhs, rhs, ret;
4356 enum tree_code code;
4357 gcc_assert (!after || c_dialect_objc ());
4358 lhs = c_parser_conditional_expression (parser, after);
4359 switch (c_parser_peek_token (parser)->type)
4368 code = TRUNC_DIV_EXPR;
4371 code = TRUNC_MOD_EXPR;
4386 code = BIT_AND_EXPR;
4389 code = BIT_XOR_EXPR;
4392 code = BIT_IOR_EXPR;
4397 c_parser_consume_token (parser);
4398 rhs = c_parser_expr_no_commas (parser, NULL);
4399 rhs = default_function_array_conversion (rhs);
4400 ret.value = build_modify_expr (lhs.value, code, rhs.value);
4401 if (code == NOP_EXPR)
4402 ret.original_code = MODIFY_EXPR;
4405 TREE_NO_WARNING (ret.value) = 1;
4406 ret.original_code = ERROR_MARK;
4411 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4412 is not NULL then it is an Objective-C message expression which is
4413 the primary-expression starting the expression as an initializer.
4415 conditional-expression:
4416 logical-OR-expression
4417 logical-OR-expression ? expression : conditional-expression
4421 conditional-expression:
4422 logical-OR-expression ? : conditional-expression
4425 static struct c_expr
4426 c_parser_conditional_expression (c_parser *parser, struct c_expr *after)
4428 struct c_expr cond, exp1, exp2, ret;
4429 location_t cond_loc;
4431 gcc_assert (!after || c_dialect_objc ());
4433 cond_loc = c_parser_peek_token (parser)->location;
4434 cond = c_parser_binary_expression (parser, after);
4436 if (c_parser_next_token_is_not (parser, CPP_QUERY))
4438 cond = default_function_array_conversion (cond);
4439 c_parser_consume_token (parser);
4440 if (c_parser_next_token_is (parser, CPP_COLON))
4442 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
4443 "ISO C forbids omitting the middle term of a ?: expression");
4444 /* Make sure first operand is calculated only once. */
4445 exp1.value = save_expr (default_conversion (cond.value));
4446 cond.value = c_objc_common_truthvalue_conversion (cond_loc, exp1.value);
4447 skip_evaluation += cond.value == truthvalue_true_node;
4452 = c_objc_common_truthvalue_conversion
4453 (cond_loc, default_conversion (cond.value));
4454 skip_evaluation += cond.value == truthvalue_false_node;
4455 exp1 = c_parser_expression_conv (parser);
4456 skip_evaluation += ((cond.value == truthvalue_true_node)
4457 - (cond.value == truthvalue_false_node));
4459 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
4461 skip_evaluation -= cond.value == truthvalue_true_node;
4462 ret.value = error_mark_node;
4463 ret.original_code = ERROR_MARK;
4466 exp2 = c_parser_conditional_expression (parser, NULL);
4467 exp2 = default_function_array_conversion (exp2);
4468 skip_evaluation -= cond.value == truthvalue_true_node;
4469 ret.value = build_conditional_expr (cond.value, exp1.value, exp2.value);
4470 ret.original_code = ERROR_MARK;
4474 /* Parse a binary expression; that is, a logical-OR-expression (C90
4475 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4476 an Objective-C message expression which is the primary-expression
4477 starting the expression as an initializer.
4479 multiplicative-expression:
4481 multiplicative-expression * cast-expression
4482 multiplicative-expression / cast-expression
4483 multiplicative-expression % cast-expression
4485 additive-expression:
4486 multiplicative-expression
4487 additive-expression + multiplicative-expression
4488 additive-expression - multiplicative-expression
4492 shift-expression << additive-expression
4493 shift-expression >> additive-expression
4495 relational-expression:
4497 relational-expression < shift-expression
4498 relational-expression > shift-expression
4499 relational-expression <= shift-expression
4500 relational-expression >= shift-expression
4502 equality-expression:
4503 relational-expression
4504 equality-expression == relational-expression
4505 equality-expression != relational-expression
4509 AND-expression & equality-expression
4511 exclusive-OR-expression:
4513 exclusive-OR-expression ^ AND-expression
4515 inclusive-OR-expression:
4516 exclusive-OR-expression
4517 inclusive-OR-expression | exclusive-OR-expression
4519 logical-AND-expression:
4520 inclusive-OR-expression
4521 logical-AND-expression && inclusive-OR-expression
4523 logical-OR-expression:
4524 logical-AND-expression
4525 logical-OR-expression || logical-AND-expression
4528 static struct c_expr
4529 c_parser_binary_expression (c_parser *parser, struct c_expr *after)
4531 /* A binary expression is parsed using operator-precedence parsing,
4532 with the operands being cast expressions. All the binary
4533 operators are left-associative. Thus a binary expression is of
4536 E0 op1 E1 op2 E2 ...
4538 which we represent on a stack. On the stack, the precedence
4539 levels are strictly increasing. When a new operator is
4540 encountered of higher precedence than that at the top of the
4541 stack, it is pushed; its LHS is the top expression, and its RHS
4542 is everything parsed until it is popped. When a new operator is
4543 encountered with precedence less than or equal to that at the top
4544 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4545 by the result of the operation until the operator at the top of
4546 the stack has lower precedence than the new operator or there is
4547 only one element on the stack; then the top expression is the LHS
4548 of the new operator. In the case of logical AND and OR
4549 expressions, we also need to adjust skip_evaluation as
4550 appropriate when the operators are pushed and popped. */
4552 /* The precedence levels, where 0 is a dummy lowest level used for
4553 the bottom of the stack. */
4569 /* The expression at this stack level. */
4571 /* The precedence of the operator on its left, PREC_NONE at the
4572 bottom of the stack. */
4574 /* The operation on its left. */
4578 /* Location of the binary operator. */
4579 location_t binary_loc;
4582 switch (stack[sp].op) \
4584 case TRUTH_ANDIF_EXPR: \
4585 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4587 case TRUTH_ORIF_EXPR: \
4588 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4593 stack[sp - 1].expr \
4594 = default_function_array_conversion (stack[sp - 1].expr); \
4596 = default_function_array_conversion (stack[sp].expr); \
4597 stack[sp - 1].expr = parser_build_binary_op (binary_loc, \
4599 stack[sp - 1].expr, \
4603 gcc_assert (!after || c_dialect_objc ());
4604 stack[0].expr = c_parser_cast_expression (parser, after);
4605 stack[0].prec = PREC_NONE;
4610 enum tree_code ocode;
4613 switch (c_parser_peek_token (parser)->type)
4621 ocode = TRUNC_DIV_EXPR;
4625 ocode = TRUNC_MOD_EXPR;
4637 ocode = LSHIFT_EXPR;
4641 ocode = RSHIFT_EXPR;
4655 case CPP_GREATER_EQ:
4668 oprec = PREC_BITAND;
4669 ocode = BIT_AND_EXPR;
4672 oprec = PREC_BITXOR;
4673 ocode = BIT_XOR_EXPR;
4677 ocode = BIT_IOR_EXPR;
4680 oprec = PREC_LOGAND;
4681 ocode = TRUTH_ANDIF_EXPR;
4685 ocode = TRUTH_ORIF_EXPR;
4688 /* Not a binary operator, so end of the binary
4692 binary_loc = c_parser_peek_token (parser)->location;
4693 c_parser_consume_token (parser);
4694 while (oprec <= stack[sp].prec)
4698 case TRUTH_ANDIF_EXPR:
4700 = default_function_array_conversion (stack[sp].expr);
4701 stack[sp].expr.value = c_objc_common_truthvalue_conversion
4702 (binary_loc, default_conversion (stack[sp].expr.value));
4703 skip_evaluation += stack[sp].expr.value == truthvalue_false_node;
4705 case TRUTH_ORIF_EXPR:
4707 = default_function_array_conversion (stack[sp].expr);
4708 stack[sp].expr.value = c_objc_common_truthvalue_conversion
4709 (binary_loc, default_conversion (stack[sp].expr.value));
4710 skip_evaluation += stack[sp].expr.value == truthvalue_true_node;
4716 stack[sp].expr = c_parser_cast_expression (parser, NULL);
4717 stack[sp].prec = oprec;
4718 stack[sp].op = ocode;
4723 return stack[0].expr;
4727 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4728 NULL then it is an Objective-C message expression which is the
4729 primary-expression starting the expression as an initializer.
4733 ( type-name ) unary-expression
4736 static struct c_expr
4737 c_parser_cast_expression (c_parser *parser, struct c_expr *after)
4739 gcc_assert (!after || c_dialect_objc ());
4741 return c_parser_postfix_expression_after_primary (parser, *after);
4742 /* If the expression begins with a parenthesized type name, it may
4743 be either a cast or a compound literal; we need to see whether
4744 the next character is '{' to tell the difference. If not, it is
4745 an unary expression. */
4746 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4747 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4749 struct c_type_name *type_name;
4752 c_parser_consume_token (parser);
4753 type_name = c_parser_type_name (parser);
4754 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4755 if (type_name == NULL)
4757 ret.value = error_mark_node;
4758 ret.original_code = ERROR_MARK;
4762 /* Save casted types in the function's used types hash table. */
4763 used_types_insert (type_name->specs->type);
4765 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4766 return c_parser_postfix_expression_after_paren_type (parser,
4768 expr = c_parser_cast_expression (parser, NULL);
4769 expr = default_function_array_conversion (expr);
4770 ret.value = c_cast_expr (type_name, expr.value);
4771 ret.original_code = ERROR_MARK;
4775 return c_parser_unary_expression (parser);
4778 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4784 unary-operator cast-expression
4785 sizeof unary-expression
4786 sizeof ( type-name )
4788 unary-operator: one of
4794 __alignof__ unary-expression
4795 __alignof__ ( type-name )
4798 unary-operator: one of
4799 __extension__ __real__ __imag__
4801 In addition, the GNU syntax treats ++ and -- as unary operators, so
4802 they may be applied to cast expressions with errors for non-lvalues
4805 static struct c_expr
4806 c_parser_unary_expression (c_parser *parser)
4809 struct c_expr ret, op;
4810 location_t loc = c_parser_peek_token (parser)->location;
4811 switch (c_parser_peek_token (parser)->type)
4814 c_parser_consume_token (parser);
4815 op = c_parser_cast_expression (parser, NULL);
4816 op = default_function_array_conversion (op);
4817 return parser_build_unary_op (PREINCREMENT_EXPR, op, loc);
4818 case CPP_MINUS_MINUS:
4819 c_parser_consume_token (parser);
4820 op = c_parser_cast_expression (parser, NULL);
4821 op = default_function_array_conversion (op);
4822 return parser_build_unary_op (PREDECREMENT_EXPR, op, loc);
4824 c_parser_consume_token (parser);
4825 return parser_build_unary_op (ADDR_EXPR,
4826 c_parser_cast_expression (parser, NULL),
4829 c_parser_consume_token (parser);
4830 op = c_parser_cast_expression (parser, NULL);
4831 op = default_function_array_conversion (op);
4832 ret.value = build_indirect_ref (op.value, "unary *", loc);
4833 ret.original_code = ERROR_MARK;
4836 if (!c_dialect_objc () && !in_system_header)
4837 warning (OPT_Wtraditional,
4838 "%Htraditional C rejects the unary plus operator",
4839 &c_parser_peek_token (parser)->location);
4840 c_parser_consume_token (parser);
4841 op = c_parser_cast_expression (parser, NULL);
4842 op = default_function_array_conversion (op);
4843 return parser_build_unary_op (CONVERT_EXPR, op, loc);
4845 c_parser_consume_token (parser);
4846 op = c_parser_cast_expression (parser, NULL);
4847 op = default_function_array_conversion (op);
4848 return parser_build_unary_op (NEGATE_EXPR, op, loc);
4850 c_parser_consume_token (parser);
4851 op = c_parser_cast_expression (parser, NULL);
4852 op = default_function_array_conversion (op);
4853 return parser_build_unary_op (BIT_NOT_EXPR, op, loc);
4855 c_parser_consume_token (parser);
4856 op = c_parser_cast_expression (parser, NULL);
4857 op = default_function_array_conversion (op);
4858 return parser_build_unary_op (TRUTH_NOT_EXPR, op, loc);
4860 /* Refer to the address of a label as a pointer. */
4861 c_parser_consume_token (parser);
4862 if (c_parser_next_token_is (parser, CPP_NAME))
4864 ret.value = finish_label_address_expr
4865 (c_parser_peek_token (parser)->value, loc);
4866 c_parser_consume_token (parser);
4870 c_parser_error (parser, "expected identifier");
4871 ret.value = error_mark_node;
4873 ret.original_code = ERROR_MARK;
4876 switch (c_parser_peek_token (parser)->keyword)
4879 return c_parser_sizeof_expression (parser);
4881 return c_parser_alignof_expression (parser);
4883 c_parser_consume_token (parser);
4884 ext = disable_extension_diagnostics ();
4885 ret = c_parser_cast_expression (parser, NULL);
4886 restore_extension_diagnostics (ext);
4889 c_parser_consume_token (parser);
4890 op = c_parser_cast_expression (parser, NULL);
4891 op = default_function_array_conversion (op);
4892 return parser_build_unary_op (REALPART_EXPR, op, loc);
4894 c_parser_consume_token (parser);
4895 op = c_parser_cast_expression (parser, NULL);
4896 op = default_function_array_conversion (op);
4897 return parser_build_unary_op (IMAGPART_EXPR, op, loc);
4899 return c_parser_postfix_expression (parser);
4902 return c_parser_postfix_expression (parser);
4906 /* Parse a sizeof expression. */
4908 static struct c_expr
4909 c_parser_sizeof_expression (c_parser *parser)
4912 location_t expr_loc;
4913 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SIZEOF));
4914 c_parser_consume_token (parser);
4917 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4918 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4920 /* Either sizeof ( type-name ) or sizeof unary-expression
4921 starting with a compound literal. */
4922 struct c_type_name *type_name;
4923 c_parser_consume_token (parser);
4924 expr_loc = c_parser_peek_token (parser)->location;
4925 type_name = c_parser_type_name (parser);
4926 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4927 if (type_name == NULL)
4932 ret.value = error_mark_node;
4933 ret.original_code = ERROR_MARK;
4936 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4938 expr = c_parser_postfix_expression_after_paren_type (parser,
4942 /* sizeof ( type-name ). */
4945 if (type_name->declarator->kind == cdk_array
4946 && type_name->declarator->u.array.vla_unspec_p)
4949 error ("%H%<[*]%> not allowed in other than a declaration",
4952 return c_expr_sizeof_type (type_name);
4956 expr_loc = c_parser_peek_token (parser)->location;
4957 expr = c_parser_unary_expression (parser);
4961 if (TREE_CODE (expr.value) == COMPONENT_REF
4962 && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1)))
4963 error ("%H%<sizeof%> applied to a bit-field", &expr_loc);
4964 return c_expr_sizeof_expr (expr);
4968 /* Parse an alignof expression. */
4970 static struct c_expr
4971 c_parser_alignof_expression (c_parser *parser)
4974 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF));
4975 c_parser_consume_token (parser);
4978 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4979 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4981 /* Either __alignof__ ( type-name ) or __alignof__
4982 unary-expression starting with a compound literal. */
4983 struct c_type_name *type_name;
4985 c_parser_consume_token (parser);
4986 type_name = c_parser_type_name (parser);
4987 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4988 if (type_name == NULL)
4993 ret.value = error_mark_node;
4994 ret.original_code = ERROR_MARK;
4997 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4999 expr = c_parser_postfix_expression_after_paren_type (parser,
5003 /* alignof ( type-name ). */
5006 ret.value = c_alignof (groktypename (type_name));
5007 ret.original_code = ERROR_MARK;
5013 expr = c_parser_unary_expression (parser);
5017 ret.value = c_alignof_expr (expr.value);
5018 ret.original_code = ERROR_MARK;
5023 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
5027 postfix-expression [ expression ]
5028 postfix-expression ( argument-expression-list[opt] )
5029 postfix-expression . identifier
5030 postfix-expression -> identifier
5031 postfix-expression ++
5032 postfix-expression --
5033 ( type-name ) { initializer-list }
5034 ( type-name ) { initializer-list , }
5036 argument-expression-list:
5038 argument-expression-list , argument-expression
5050 (treated as a keyword in GNU C)
5053 ( compound-statement )
5054 __builtin_va_arg ( assignment-expression , type-name )
5055 __builtin_offsetof ( type-name , offsetof-member-designator )
5056 __builtin_choose_expr ( assignment-expression ,
5057 assignment-expression ,
5058 assignment-expression )
5059 __builtin_types_compatible_p ( type-name , type-name )
5061 offsetof-member-designator:
5063 offsetof-member-designator . identifier
5064 offsetof-member-designator [ expression ]
5069 [ objc-receiver objc-message-args ]
5070 @selector ( objc-selector-arg )
5071 @protocol ( identifier )
5072 @encode ( type-name )
5076 static struct c_expr
5077 c_parser_postfix_expression (c_parser *parser)
5079 struct c_expr expr, e1, e2, e3;
5080 struct c_type_name *t1, *t2;
5082 switch (c_parser_peek_token (parser)->type)
5089 expr.value = c_parser_peek_token (parser)->value;
5090 expr.original_code = ERROR_MARK;
5091 c_parser_consume_token (parser);
5097 expr.value = c_parser_peek_token (parser)->value;
5098 expr.original_code = STRING_CST;
5099 c_parser_consume_token (parser);
5101 case CPP_OBJC_STRING:
5102 gcc_assert (c_dialect_objc ());
5104 = objc_build_string_object (c_parser_peek_token (parser)->value);
5105 expr.original_code = ERROR_MARK;
5106 c_parser_consume_token (parser);
5109 if (c_parser_peek_token (parser)->id_kind != C_ID_ID)
5111 c_parser_error (parser, "expected expression");
5112 expr.value = error_mark_node;
5113 expr.original_code = ERROR_MARK;
5117 tree id = c_parser_peek_token (parser)->value;
5118 location_t loc = c_parser_peek_token (parser)->location;
5119 c_parser_consume_token (parser);
5120 expr.value = build_external_ref (id,
5121 (c_parser_peek_token (parser)->type
5122 == CPP_OPEN_PAREN), loc);
5123 expr.original_code = ERROR_MARK;
5126 case CPP_OPEN_PAREN:
5127 /* A parenthesized expression, statement expression or compound
5129 if (c_parser_peek_2nd_token (parser)->type == CPP_OPEN_BRACE)
5131 /* A statement expression. */
5133 location_t here = c_parser_peek_token (parser)->location;
5134 c_parser_consume_token (parser);
5135 c_parser_consume_token (parser);
5136 if (cur_stmt_list == NULL)
5138 error ("%Hbraced-group within expression allowed "
5139 "only inside a function", &here);
5140 parser->error = true;
5141 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
5142 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5143 expr.value = error_mark_node;
5144 expr.original_code = ERROR_MARK;
5147 stmt = c_begin_stmt_expr ();
5148 c_parser_compound_statement_nostart (parser);
5149 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5151 pedwarn (here, OPT_pedantic,
5152 "ISO C forbids braced-groups within expressions");
5153 expr.value = c_finish_stmt_expr (stmt);
5154 expr.original_code = ERROR_MARK;
5156 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser)))
5158 /* A compound literal. ??? Can we actually get here rather
5159 than going directly to
5160 c_parser_postfix_expression_after_paren_type from
5162 struct c_type_name *type_name;
5163 c_parser_consume_token (parser);
5164 type_name = c_parser_type_name (parser);
5165 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5167 if (type_name == NULL)
5169 expr.value = error_mark_node;
5170 expr.original_code = ERROR_MARK;
5173 expr = c_parser_postfix_expression_after_paren_type (parser,
5178 /* A parenthesized expression. */
5179 c_parser_consume_token (parser);
5180 expr = c_parser_expression (parser);
5181 if (TREE_CODE (expr.value) == MODIFY_EXPR)
5182 TREE_NO_WARNING (expr.value) = 1;
5183 expr.original_code = ERROR_MARK;
5184 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5189 switch (c_parser_peek_token (parser)->keyword)
5191 case RID_FUNCTION_NAME:
5192 case RID_PRETTY_FUNCTION_NAME:
5193 case RID_C99_FUNCTION_NAME:
5194 expr.value = fname_decl (c_parser_peek_token (parser)->keyword,
5195 c_parser_peek_token (parser)->value);
5196 expr.original_code = ERROR_MARK;
5197 c_parser_consume_token (parser);
5200 c_parser_consume_token (parser);
5201 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5203 expr.value = error_mark_node;
5204 expr.original_code = ERROR_MARK;
5207 e1 = c_parser_expr_no_commas (parser, NULL);
5208 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5210 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5211 expr.value = error_mark_node;
5212 expr.original_code = ERROR_MARK;
5215 t1 = c_parser_type_name (parser);
5216 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5220 expr.value = error_mark_node;
5221 expr.original_code = ERROR_MARK;
5225 expr.value = build_va_arg (e1.value, groktypename (t1));
5226 expr.original_code = ERROR_MARK;
5230 c_parser_consume_token (parser);
5231 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5233 expr.value = error_mark_node;
5234 expr.original_code = ERROR_MARK;
5237 t1 = c_parser_type_name (parser);
5240 expr.value = error_mark_node;
5241 expr.original_code = ERROR_MARK;
5244 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5246 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5247 expr.value = error_mark_node;
5248 expr.original_code = ERROR_MARK;
5252 tree type = groktypename (t1);
5254 if (type == error_mark_node)
5255 offsetof_ref = error_mark_node;
5257 offsetof_ref = build1 (INDIRECT_REF, type, null_pointer_node);
5258 /* Parse the second argument to __builtin_offsetof. We
5259 must have one identifier, and beyond that we want to
5260 accept sub structure and sub array references. */
5261 if (c_parser_next_token_is (parser, CPP_NAME))
5263 offsetof_ref = build_component_ref
5264 (offsetof_ref, c_parser_peek_token (parser)->value);
5265 c_parser_consume_token (parser);
5266 while (c_parser_next_token_is (parser, CPP_DOT)
5267 || c_parser_next_token_is (parser,
5270 if (c_parser_next_token_is (parser, CPP_DOT))
5272 c_parser_consume_token (parser);
5273 if (c_parser_next_token_is_not (parser,
5276 c_parser_error (parser, "expected identifier");
5279 offsetof_ref = build_component_ref
5281 c_parser_peek_token (parser)->value);
5282 c_parser_consume_token (parser);
5287 loc = c_parser_peek_token (parser)->location;
5288 c_parser_consume_token (parser);
5289 idx = c_parser_expression (parser).value;
5290 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5292 offsetof_ref = build_array_ref (offsetof_ref, idx, loc);
5297 c_parser_error (parser, "expected identifier");
5298 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5300 expr.value = fold_offsetof (offsetof_ref, NULL_TREE);
5301 expr.original_code = ERROR_MARK;
5304 case RID_CHOOSE_EXPR:
5305 c_parser_consume_token (parser);
5306 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5308 expr.value = error_mark_node;
5309 expr.original_code = ERROR_MARK;
5312 loc = c_parser_peek_token (parser)->location;
5313 e1 = c_parser_expr_no_commas (parser, NULL);
5314 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5316 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5317 expr.value = error_mark_node;
5318 expr.original_code = ERROR_MARK;
5321 e2 = c_parser_expr_no_commas (parser, NULL);
5322 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5324 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5325 expr.value = error_mark_node;
5326 expr.original_code = ERROR_MARK;
5329 e3 = c_parser_expr_no_commas (parser, NULL);
5330 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5335 c = fold (e1.value);
5336 if (TREE_CODE (c) != INTEGER_CST)
5337 error ("%Hfirst argument to %<__builtin_choose_expr%> not"
5338 " a constant", &loc);
5339 expr = integer_zerop (c) ? e3 : e2;
5342 case RID_TYPES_COMPATIBLE_P:
5343 c_parser_consume_token (parser);
5344 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5346 expr.value = error_mark_node;
5347 expr.original_code = ERROR_MARK;
5350 t1 = c_parser_type_name (parser);
5353 expr.value = error_mark_node;
5354 expr.original_code = ERROR_MARK;
5357 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5359 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5360 expr.value = error_mark_node;
5361 expr.original_code = ERROR_MARK;
5364 t2 = c_parser_type_name (parser);
5367 expr.value = error_mark_node;
5368 expr.original_code = ERROR_MARK;
5371 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5376 e1 = TYPE_MAIN_VARIANT (groktypename (t1));
5377 e2 = TYPE_MAIN_VARIANT (groktypename (t2));
5379 expr.value = comptypes (e1, e2)
5380 ? build_int_cst (NULL_TREE, 1)
5381 : build_int_cst (NULL_TREE, 0);
5382 expr.original_code = ERROR_MARK;
5385 case RID_AT_SELECTOR:
5386 gcc_assert (c_dialect_objc ());
5387 c_parser_consume_token (parser);
5388 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5390 expr.value = error_mark_node;
5391 expr.original_code = ERROR_MARK;
5395 tree sel = c_parser_objc_selector_arg (parser);
5396 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5398 expr.value = objc_build_selector_expr (sel);
5399 expr.original_code = ERROR_MARK;
5402 case RID_AT_PROTOCOL:
5403 gcc_assert (c_dialect_objc ());
5404 c_parser_consume_token (parser);
5405 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5407 expr.value = error_mark_node;
5408 expr.original_code = ERROR_MARK;
5411 if (c_parser_next_token_is_not (parser, CPP_NAME))
5413 c_parser_error (parser, "expected identifier");
5414 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5415 expr.value = error_mark_node;
5416 expr.original_code = ERROR_MARK;
5420 tree id = c_parser_peek_token (parser)->value;
5421 c_parser_consume_token (parser);
5422 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5424 expr.value = objc_build_protocol_expr (id);
5425 expr.original_code = ERROR_MARK;
5429 /* Extension to support C-structures in the archiver. */
5430 gcc_assert (c_dialect_objc ());
5431 c_parser_consume_token (parser);
5432 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5434 expr.value = error_mark_node;
5435 expr.original_code = ERROR_MARK;
5438 t1 = c_parser_type_name (parser);
5441 expr.value = error_mark_node;
5442 expr.original_code = ERROR_MARK;
5443 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5446 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5449 tree type = groktypename (t1);
5450 expr.value = objc_build_encode_expr (type);
5451 expr.original_code = ERROR_MARK;
5455 c_parser_error (parser, "expected expression");
5456 expr.value = error_mark_node;
5457 expr.original_code = ERROR_MARK;
5461 case CPP_OPEN_SQUARE:
5462 if (c_dialect_objc ())
5464 tree receiver, args;
5465 c_parser_consume_token (parser);
5466 receiver = c_parser_objc_receiver (parser);
5467 args = c_parser_objc_message_args (parser);
5468 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5470 expr.value = objc_build_message_expr (build_tree_list (receiver,
5472 expr.original_code = ERROR_MARK;
5475 /* Else fall through to report error. */
5477 c_parser_error (parser, "expected expression");
5478 expr.value = error_mark_node;
5479 expr.original_code = ERROR_MARK;
5482 return c_parser_postfix_expression_after_primary (parser, expr);
5485 /* Parse a postfix expression after a parenthesized type name: the
5486 brace-enclosed initializer of a compound literal, possibly followed
5487 by some postfix operators. This is separate because it is not
5488 possible to tell until after the type name whether a cast
5489 expression has a cast or a compound literal, or whether the operand
5490 of sizeof is a parenthesized type name or starts with a compound
5493 static struct c_expr
5494 c_parser_postfix_expression_after_paren_type (c_parser *parser,
5495 struct c_type_name *type_name)
5500 location_t start_loc;
5501 start_init (NULL_TREE, NULL, 0);
5502 type = groktypename (type_name);
5503 start_loc = c_parser_peek_token (parser)->location;
5504 if (type != error_mark_node && C_TYPE_VARIABLE_SIZE (type))
5506 error ("%Hcompound literal has variable size", &start_loc);
5507 type = error_mark_node;
5509 init = c_parser_braced_init (parser, type, false);
5511 maybe_warn_string_init (type, init);
5514 pedwarn (start_loc, OPT_pedantic, "ISO C90 forbids compound literals");
5515 expr.value = build_compound_literal (type, init.value);
5516 expr.original_code = ERROR_MARK;
5517 return c_parser_postfix_expression_after_primary (parser, expr);
5520 /* Parse a postfix expression after the initial primary or compound
5521 literal; that is, parse a series of postfix operators. */
5523 static struct c_expr
5524 c_parser_postfix_expression_after_primary (c_parser *parser,
5527 tree ident, idx, exprlist;
5528 location_t loc = c_parser_peek_token (parser)->location;
5531 switch (c_parser_peek_token (parser)->type)
5533 case CPP_OPEN_SQUARE:
5534 /* Array reference. */
5535 loc = c_parser_peek_token (parser)->location;
5536 c_parser_consume_token (parser);
5537 idx = c_parser_expression (parser).value;
5538 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5540 expr.value = build_array_ref (expr.value, idx, loc);
5541 expr.original_code = ERROR_MARK;
5543 case CPP_OPEN_PAREN:
5544 /* Function call. */
5545 c_parser_consume_token (parser);
5546 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
5547 exprlist = NULL_TREE;
5549 exprlist = c_parser_expr_list (parser, true);
5550 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5552 expr.value = build_function_call (expr.value, exprlist);
5553 expr.original_code = ERROR_MARK;
5554 if (warn_disallowed_functions)
5555 warn_if_disallowed_function_p (expr.value);
5558 /* Structure element reference. */
5559 c_parser_consume_token (parser);
5560 expr = default_function_array_conversion (expr);
5561 if (c_parser_next_token_is (parser, CPP_NAME))
5562 ident = c_parser_peek_token (parser)->value;
5565 c_parser_error (parser, "expected identifier");
5566 expr.value = error_mark_node;
5567 expr.original_code = ERROR_MARK;
5570 c_parser_consume_token (parser);
5571 expr.value = build_component_ref (expr.value, ident);
5572 expr.original_code = ERROR_MARK;
5575 /* Structure element reference. */
5576 c_parser_consume_token (parser);
5577 expr = default_function_array_conversion (expr);
5578 if (c_parser_next_token_is (parser, CPP_NAME))
5579 ident = c_parser_peek_token (parser)->value;
5582 c_parser_error (parser, "expected identifier");
5583 expr.value = error_mark_node;
5584 expr.original_code = ERROR_MARK;
5587 c_parser_consume_token (parser);
5588 expr.value = build_component_ref (build_indirect_ref (expr.value,
5591 expr.original_code = ERROR_MARK;
5594 /* Postincrement. */
5595 c_parser_consume_token (parser);
5596 expr = default_function_array_conversion (expr);
5597 expr.value = build_unary_op (POSTINCREMENT_EXPR, expr.value, 0);
5598 expr.original_code = ERROR_MARK;
5600 case CPP_MINUS_MINUS:
5601 /* Postdecrement. */
5602 c_parser_consume_token (parser);
5603 expr = default_function_array_conversion (expr);
5604 expr.value = build_unary_op (POSTDECREMENT_EXPR, expr.value, 0);
5605 expr.original_code = ERROR_MARK;
5613 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5616 assignment-expression
5617 expression , assignment-expression
5620 static struct c_expr
5621 c_parser_expression (c_parser *parser)
5624 expr = c_parser_expr_no_commas (parser, NULL);
5625 while (c_parser_next_token_is (parser, CPP_COMMA))
5628 c_parser_consume_token (parser);
5629 next = c_parser_expr_no_commas (parser, NULL);
5630 next = default_function_array_conversion (next);
5631 expr.value = build_compound_expr (expr.value, next.value);
5632 expr.original_code = COMPOUND_EXPR;
5637 /* Parse an expression and convert functions or arrays to
5640 static struct c_expr
5641 c_parser_expression_conv (c_parser *parser)
5644 expr = c_parser_expression (parser);
5645 expr = default_function_array_conversion (expr);
5649 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5650 functions and arrays to pointers.
5653 assignment-expression
5654 nonempty-expr-list , assignment-expression
5658 c_parser_expr_list (c_parser *parser, bool convert_p)
5662 expr = c_parser_expr_no_commas (parser, NULL);
5664 expr = default_function_array_conversion (expr);
5665 ret = cur = build_tree_list (NULL_TREE, expr.value);
5666 while (c_parser_next_token_is (parser, CPP_COMMA))
5668 c_parser_consume_token (parser);
5669 expr = c_parser_expr_no_commas (parser, NULL);
5671 expr = default_function_array_conversion (expr);
5672 cur = TREE_CHAIN (cur) = build_tree_list (NULL_TREE, expr.value);
5678 /* Parse Objective-C-specific constructs. */
5680 /* Parse an objc-class-definition.
5682 objc-class-definition:
5683 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5684 objc-class-instance-variables[opt] objc-methodprotolist @end
5685 @implementation identifier objc-superclass[opt]
5686 objc-class-instance-variables[opt]
5687 @interface identifier ( identifier ) objc-protocol-refs[opt]
5688 objc-methodprotolist @end
5689 @implementation identifier ( identifier )
5694 "@interface identifier (" must start "@interface identifier (
5695 identifier ) ...": objc-methodprotolist in the first production may
5696 not start with a parenthesized identifier as a declarator of a data
5697 definition with no declaration specifiers if the objc-superclass,
5698 objc-protocol-refs and objc-class-instance-variables are omitted. */
5701 c_parser_objc_class_definition (c_parser *parser)
5706 if (c_parser_next_token_is_keyword (parser, RID_AT_INTERFACE))
5708 else if (c_parser_next_token_is_keyword (parser, RID_AT_IMPLEMENTATION))
5712 c_parser_consume_token (parser);
5713 if (c_parser_next_token_is_not (parser, CPP_NAME))
5715 c_parser_error (parser, "expected identifier");
5718 id1 = c_parser_peek_token (parser)->value;
5719 c_parser_consume_token (parser);
5720 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
5723 tree proto = NULL_TREE;
5724 c_parser_consume_token (parser);
5725 if (c_parser_next_token_is_not (parser, CPP_NAME))
5727 c_parser_error (parser, "expected identifier");
5728 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5731 id2 = c_parser_peek_token (parser)->value;
5732 c_parser_consume_token (parser);
5733 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
5736 objc_start_category_implementation (id1, id2);
5739 if (c_parser_next_token_is (parser, CPP_LESS))
5740 proto = c_parser_objc_protocol_refs (parser);
5741 objc_start_category_interface (id1, id2, proto);
5742 c_parser_objc_methodprotolist (parser);
5743 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5744 objc_finish_interface ();
5747 if (c_parser_next_token_is (parser, CPP_COLON))
5749 c_parser_consume_token (parser);
5750 if (c_parser_next_token_is_not (parser, CPP_NAME))
5752 c_parser_error (parser, "expected identifier");
5755 superclass = c_parser_peek_token (parser)->value;
5756 c_parser_consume_token (parser);
5759 superclass = NULL_TREE;
5762 tree proto = NULL_TREE;
5763 if (c_parser_next_token_is (parser, CPP_LESS))
5764 proto = c_parser_objc_protocol_refs (parser);
5765 objc_start_class_interface (id1, superclass, proto);
5768 objc_start_class_implementation (id1, superclass);
5769 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5770 c_parser_objc_class_instance_variables (parser);
5773 objc_continue_interface ();
5774 c_parser_objc_methodprotolist (parser);
5775 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5776 objc_finish_interface ();
5780 objc_continue_implementation ();
5785 /* Parse objc-class-instance-variables.
5787 objc-class-instance-variables:
5788 { objc-instance-variable-decl-list[opt] }
5790 objc-instance-variable-decl-list:
5791 objc-visibility-spec
5792 objc-instance-variable-decl ;
5794 objc-instance-variable-decl-list objc-visibility-spec
5795 objc-instance-variable-decl-list objc-instance-variable-decl ;
5796 objc-instance-variable-decl-list ;
5798 objc-visibility-spec:
5803 objc-instance-variable-decl:
5808 c_parser_objc_class_instance_variables (c_parser *parser)
5810 gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE));
5811 c_parser_consume_token (parser);
5812 while (c_parser_next_token_is_not (parser, CPP_EOF))
5815 /* Parse any stray semicolon. */
5816 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
5818 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
5819 "extra semicolon in struct or union specified");
5820 c_parser_consume_token (parser);
5823 /* Stop if at the end of the instance variables. */
5824 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
5826 c_parser_consume_token (parser);
5829 /* Parse any objc-visibility-spec. */
5830 if (c_parser_next_token_is_keyword (parser, RID_PRIVATE))
5832 c_parser_consume_token (parser);
5833 objc_set_visibility (2);
5836 else if (c_parser_next_token_is_keyword (parser, RID_PROTECTED))
5838 c_parser_consume_token (parser);
5839 objc_set_visibility (0);
5842 else if (c_parser_next_token_is_keyword (parser, RID_PUBLIC))
5844 c_parser_consume_token (parser);
5845 objc_set_visibility (1);
5848 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
5850 c_parser_pragma (parser, pragma_external);
5854 /* Parse some comma-separated declarations. */
5855 decls = c_parser_struct_declaration (parser);
5857 /* Comma-separated instance variables are chained together in
5858 reverse order; add them one by one. */
5859 tree ivar = nreverse (decls);
5860 for (; ivar; ivar = TREE_CHAIN (ivar))
5861 objc_add_instance_variable (copy_node (ivar));
5863 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5867 /* Parse an objc-class-declaration.
5869 objc-class-declaration:
5870 @class identifier-list ;
5874 c_parser_objc_class_declaration (c_parser *parser)
5876 tree list = NULL_TREE;
5877 gcc_assert (c_parser_next_token_is_keyword (parser, RID_CLASS));
5878 c_parser_consume_token (parser);
5879 /* Any identifiers, including those declared as type names, are OK
5884 if (c_parser_next_token_is_not (parser, CPP_NAME))
5886 c_parser_error (parser, "expected identifier");
5889 id = c_parser_peek_token (parser)->value;
5890 list = chainon (list, build_tree_list (NULL_TREE, id));
5891 c_parser_consume_token (parser);
5892 if (c_parser_next_token_is (parser, CPP_COMMA))
5893 c_parser_consume_token (parser);
5897 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5898 objc_declare_class (list);
5901 /* Parse an objc-alias-declaration.
5903 objc-alias-declaration:
5904 @compatibility_alias identifier identifier ;
5908 c_parser_objc_alias_declaration (c_parser *parser)
5911 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_ALIAS));
5912 c_parser_consume_token (parser);
5913 if (c_parser_next_token_is_not (parser, CPP_NAME))
5915 c_parser_error (parser, "expected identifier");
5916 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
5919 id1 = c_parser_peek_token (parser)->value;
5920 c_parser_consume_token (parser);
5921 if (c_parser_next_token_is_not (parser, CPP_NAME))
5923 c_parser_error (parser, "expected identifier");
5924 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
5927 id2 = c_parser_peek_token (parser)->value;
5928 c_parser_consume_token (parser);
5929 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5930 objc_declare_alias (id1, id2);
5933 /* Parse an objc-protocol-definition.
5935 objc-protocol-definition:
5936 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
5937 @protocol identifier-list ;
5939 "@protocol identifier ;" should be resolved as "@protocol
5940 identifier-list ;": objc-methodprotolist may not start with a
5941 semicolon in the first alternative if objc-protocol-refs are
5945 c_parser_objc_protocol_definition (c_parser *parser)
5947 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROTOCOL));
5948 c_parser_consume_token (parser);
5949 if (c_parser_next_token_is_not (parser, CPP_NAME))
5951 c_parser_error (parser, "expected identifier");
5954 if (c_parser_peek_2nd_token (parser)->type == CPP_COMMA
5955 || c_parser_peek_2nd_token (parser)->type == CPP_SEMICOLON)
5957 tree list = NULL_TREE;
5958 /* Any identifiers, including those declared as type names, are
5963 if (c_parser_next_token_is_not (parser, CPP_NAME))
5965 c_parser_error (parser, "expected identifier");
5968 id = c_parser_peek_token (parser)->value;
5969 list = chainon (list, build_tree_list (NULL_TREE, id));
5970 c_parser_consume_token (parser);
5971 if (c_parser_next_token_is (parser, CPP_COMMA))
5972 c_parser_consume_token (parser);
5976 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5977 objc_declare_protocols (list);
5981 tree id = c_parser_peek_token (parser)->value;
5982 tree proto = NULL_TREE;
5983 c_parser_consume_token (parser);
5984 if (c_parser_next_token_is (parser, CPP_LESS))
5985 proto = c_parser_objc_protocol_refs (parser);
5986 parser->objc_pq_context = true;
5987 objc_start_protocol (id, proto);
5988 c_parser_objc_methodprotolist (parser);
5989 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5990 parser->objc_pq_context = false;
5991 objc_finish_interface ();
5995 /* Parse an objc-method-type.
6002 static enum tree_code
6003 c_parser_objc_method_type (c_parser *parser)
6005 switch (c_parser_peek_token (parser)->type)
6008 c_parser_consume_token (parser);
6011 c_parser_consume_token (parser);
6018 /* Parse an objc-method-definition.
6020 objc-method-definition:
6021 objc-method-type objc-method-decl ;[opt] compound-statement
6025 c_parser_objc_method_definition (c_parser *parser)
6027 enum tree_code type = c_parser_objc_method_type (parser);
6029 objc_set_method_type (type);
6030 parser->objc_pq_context = true;
6031 decl = c_parser_objc_method_decl (parser);
6032 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
6034 c_parser_consume_token (parser);
6035 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
6036 "extra semicolon in method definition specified");
6038 if (!c_parser_next_token_is (parser, CPP_OPEN_BRACE))
6040 c_parser_error (parser, "expected %<{%>");
6043 parser->objc_pq_context = false;
6044 objc_start_method_definition (decl);
6045 add_stmt (c_parser_compound_statement (parser));
6046 objc_finish_method_definition (current_function_decl);
6049 /* Parse an objc-methodprotolist.
6051 objc-methodprotolist:
6053 objc-methodprotolist objc-methodproto
6054 objc-methodprotolist declaration
6055 objc-methodprotolist ;
6057 The declaration is a data definition, which may be missing
6058 declaration specifiers under the same rules and diagnostics as
6059 other data definitions outside functions, and the stray semicolon
6060 is diagnosed the same way as a stray semicolon outside a
6064 c_parser_objc_methodprotolist (c_parser *parser)
6068 /* The list is terminated by @end. */
6069 switch (c_parser_peek_token (parser)->type)
6072 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
6073 "ISO C does not allow extra %<;%> outside of a function");
6074 c_parser_consume_token (parser);
6078 c_parser_objc_methodproto (parser);
6081 c_parser_pragma (parser, pragma_external);
6086 if (c_parser_next_token_is_keyword (parser, RID_AT_END))
6088 c_parser_declaration_or_fndef (parser, false, true, false, true);
6094 /* Parse an objc-methodproto.
6097 objc-method-type objc-method-decl ;
6101 c_parser_objc_methodproto (c_parser *parser)
6103 enum tree_code type = c_parser_objc_method_type (parser);
6105 objc_set_method_type (type);
6106 /* Remember protocol qualifiers in prototypes. */
6107 parser->objc_pq_context = true;
6108 decl = c_parser_objc_method_decl (parser);
6109 /* Forget protocol qualifiers here. */
6110 parser->objc_pq_context = false;
6111 objc_add_method_declaration (decl);
6112 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
6115 /* Parse an objc-method-decl.
6118 ( objc-type-name ) objc-selector
6120 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6121 objc-keyword-selector objc-optparmlist
6123 objc-keyword-selector:
6125 objc-keyword-selector objc-keyword-decl
6128 objc-selector : ( objc-type-name ) identifier
6129 objc-selector : identifier
6130 : ( objc-type-name ) identifier
6134 objc-optparms objc-optellipsis
6138 objc-opt-parms , parameter-declaration
6146 c_parser_objc_method_decl (c_parser *parser)
6148 tree type = NULL_TREE;
6150 tree parms = NULL_TREE;
6151 bool ellipsis = false;
6153 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6155 c_parser_consume_token (parser);
6156 type = c_parser_objc_type_name (parser);
6157 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6159 sel = c_parser_objc_selector (parser);
6160 /* If there is no selector, or a colon follows, we have an
6161 objc-keyword-selector. If there is a selector, and a colon does
6162 not follow, that selector ends the objc-method-decl. */
6163 if (!sel || c_parser_next_token_is (parser, CPP_COLON))
6166 tree list = NULL_TREE;
6169 tree atype = NULL_TREE, id, keyworddecl;
6170 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6172 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6174 c_parser_consume_token (parser);
6175 atype = c_parser_objc_type_name (parser);
6176 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6179 if (c_parser_next_token_is_not (parser, CPP_NAME))
6181 c_parser_error (parser, "expected identifier");
6182 return error_mark_node;
6184 id = c_parser_peek_token (parser)->value;
6185 c_parser_consume_token (parser);
6186 keyworddecl = objc_build_keyword_decl (tsel, atype, id);
6187 list = chainon (list, keyworddecl);
6188 tsel = c_parser_objc_selector (parser);
6189 if (!tsel && c_parser_next_token_is_not (parser, CPP_COLON))
6192 /* Parse the optional parameter list. Optional Objective-C
6193 method parameters follow the C syntax, and may include '...'
6194 to denote a variable number of arguments. */
6195 parms = make_node (TREE_LIST);
6196 while (c_parser_next_token_is (parser, CPP_COMMA))
6198 struct c_parm *parm;
6199 c_parser_consume_token (parser);
6200 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
6203 c_parser_consume_token (parser);
6206 parm = c_parser_parameter_declaration (parser, NULL_TREE);
6209 parms = chainon (parms,
6210 build_tree_list (NULL_TREE, grokparm (parm)));
6214 return objc_build_method_signature (type, sel, parms, ellipsis);
6217 /* Parse an objc-type-name.
6220 objc-type-qualifiers[opt] type-name
6221 objc-type-qualifiers[opt]
6223 objc-type-qualifiers:
6225 objc-type-qualifiers objc-type-qualifier
6227 objc-type-qualifier: one of
6228 in out inout bycopy byref oneway
6232 c_parser_objc_type_name (c_parser *parser)
6234 tree quals = NULL_TREE;
6235 struct c_type_name *type_name = NULL;
6236 tree type = NULL_TREE;
6239 c_token *token = c_parser_peek_token (parser);
6240 if (token->type == CPP_KEYWORD
6241 && (token->keyword == RID_IN
6242 || token->keyword == RID_OUT
6243 || token->keyword == RID_INOUT
6244 || token->keyword == RID_BYCOPY
6245 || token->keyword == RID_BYREF
6246 || token->keyword == RID_ONEWAY))
6248 quals = chainon (quals, build_tree_list (NULL_TREE, token->value));
6249 c_parser_consume_token (parser);
6254 if (c_parser_next_token_starts_typename (parser))
6255 type_name = c_parser_type_name (parser);
6257 type = groktypename (type_name);
6258 return build_tree_list (quals, type);
6261 /* Parse objc-protocol-refs.
6268 c_parser_objc_protocol_refs (c_parser *parser)
6270 tree list = NULL_TREE;
6271 gcc_assert (c_parser_next_token_is (parser, CPP_LESS));
6272 c_parser_consume_token (parser);
6273 /* Any identifiers, including those declared as type names, are OK
6278 if (c_parser_next_token_is_not (parser, CPP_NAME))
6280 c_parser_error (parser, "expected identifier");
6283 id = c_parser_peek_token (parser)->value;
6284 list = chainon (list, build_tree_list (NULL_TREE, id));
6285 c_parser_consume_token (parser);
6286 if (c_parser_next_token_is (parser, CPP_COMMA))
6287 c_parser_consume_token (parser);
6291 c_parser_require (parser, CPP_GREATER, "expected %<>%>");
6295 /* Parse an objc-try-catch-statement.
6297 objc-try-catch-statement:
6298 @try compound-statement objc-catch-list[opt]
6299 @try compound-statement objc-catch-list[opt] @finally compound-statement
6302 @catch ( parameter-declaration ) compound-statement
6303 objc-catch-list @catch ( parameter-declaration ) compound-statement
6307 c_parser_objc_try_catch_statement (c_parser *parser)
6311 gcc_assert (c_parser_next_token_is_keyword (parser, RID_TRY));
6312 c_parser_consume_token (parser);
6313 loc = c_parser_peek_token (parser)->location;
6314 stmt = c_parser_compound_statement (parser);
6315 objc_begin_try_stmt (loc, stmt);
6316 while (c_parser_next_token_is_keyword (parser, RID_CATCH))
6318 struct c_parm *parm;
6319 c_parser_consume_token (parser);
6320 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6322 parm = c_parser_parameter_declaration (parser, NULL_TREE);
6325 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6328 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6329 objc_begin_catch_clause (grokparm (parm));
6330 if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
6331 c_parser_compound_statement_nostart (parser);
6332 objc_finish_catch_clause ();
6334 if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY))
6338 c_parser_consume_token (parser);
6339 finloc = c_parser_peek_token (parser)->location;
6340 finstmt = c_parser_compound_statement (parser);
6341 objc_build_finally_clause (finloc, finstmt);
6343 objc_finish_try_stmt ();
6346 /* Parse an objc-synchronized-statement.
6348 objc-synchronized-statement:
6349 @synchronized ( expression ) compound-statement
6353 c_parser_objc_synchronized_statement (c_parser *parser)
6357 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED));
6358 c_parser_consume_token (parser);
6359 loc = c_parser_peek_token (parser)->location;
6360 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6362 expr = c_parser_expression (parser).value;
6363 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6366 expr = error_mark_node;
6367 stmt = c_parser_compound_statement (parser);
6368 objc_build_synchronized (loc, expr, stmt);
6371 /* Parse an objc-selector; return NULL_TREE without an error if the
6372 next token is not an objc-selector.
6377 enum struct union if else while do for switch case default
6378 break continue return goto asm sizeof typeof __alignof
6379 unsigned long const short volatile signed restrict _Complex
6380 in out inout bycopy byref oneway int char float double void _Bool
6382 ??? Why this selection of keywords but not, for example, storage
6383 class specifiers? */
6386 c_parser_objc_selector (c_parser *parser)
6388 c_token *token = c_parser_peek_token (parser);
6389 tree value = token->value;
6390 if (token->type == CPP_NAME)
6392 c_parser_consume_token (parser);
6395 if (token->type != CPP_KEYWORD)
6397 switch (token->keyword)
6438 c_parser_consume_token (parser);
6445 /* Parse an objc-selector-arg.
6449 objc-keywordname-list
6451 objc-keywordname-list:
6453 objc-keywordname-list objc-keywordname
6461 c_parser_objc_selector_arg (c_parser *parser)
6463 tree sel = c_parser_objc_selector (parser);
6464 tree list = NULL_TREE;
6465 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
6469 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6471 list = chainon (list, build_tree_list (sel, NULL_TREE));
6472 sel = c_parser_objc_selector (parser);
6473 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
6479 /* Parse an objc-receiver.
6488 c_parser_objc_receiver (c_parser *parser)
6490 if (c_parser_peek_token (parser)->type == CPP_NAME
6491 && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME
6492 || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME))
6494 tree id = c_parser_peek_token (parser)->value;
6495 c_parser_consume_token (parser);
6496 return objc_get_class_reference (id);
6498 return c_parser_expression (parser).value;
6501 /* Parse objc-message-args.
6505 objc-keywordarg-list
6507 objc-keywordarg-list:
6509 objc-keywordarg-list objc-keywordarg
6512 objc-selector : objc-keywordexpr
6517 c_parser_objc_message_args (c_parser *parser)
6519 tree sel = c_parser_objc_selector (parser);
6520 tree list = NULL_TREE;
6521 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
6526 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6528 keywordexpr = c_parser_objc_keywordexpr (parser);
6529 list = chainon (list, build_tree_list (sel, keywordexpr));
6530 sel = c_parser_objc_selector (parser);
6531 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
6537 /* Parse an objc-keywordexpr.
6544 c_parser_objc_keywordexpr (c_parser *parser)
6546 tree list = c_parser_expr_list (parser, true);
6547 if (TREE_CHAIN (list) == NULL_TREE)
6549 /* Just return the expression, remove a level of
6551 return TREE_VALUE (list);
6555 /* We have a comma expression, we will collapse later. */
6561 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6562 should be considered, statements. ALLOW_STMT is true if we're within
6563 the context of a function and such pragmas are to be allowed. Returns
6564 true if we actually parsed such a pragma. */
6567 c_parser_pragma (c_parser *parser, enum pragma_context context)
6571 id = c_parser_peek_token (parser)->pragma_kind;
6572 gcc_assert (id != PRAGMA_NONE);
6576 case PRAGMA_OMP_BARRIER:
6577 if (context != pragma_compound)
6579 if (context == pragma_stmt)
6580 c_parser_error (parser, "%<#pragma omp barrier%> may only be "
6581 "used in compound statements");
6584 c_parser_omp_barrier (parser);
6587 case PRAGMA_OMP_FLUSH:
6588 if (context != pragma_compound)
6590 if (context == pragma_stmt)
6591 c_parser_error (parser, "%<#pragma omp flush%> may only be "
6592 "used in compound statements");
6595 c_parser_omp_flush (parser);
6598 case PRAGMA_OMP_TASKWAIT:
6599 if (context != pragma_compound)
6601 if (context == pragma_stmt)
6602 c_parser_error (parser, "%<#pragma omp taskwait%> may only be "
6603 "used in compound statements");
6606 c_parser_omp_taskwait (parser);
6609 case PRAGMA_OMP_THREADPRIVATE:
6610 c_parser_omp_threadprivate (parser);
6613 case PRAGMA_OMP_SECTION:
6614 error ("%H%<#pragma omp section%> may only be used in "
6615 "%<#pragma omp sections%> construct",
6616 &c_parser_peek_token (parser)->location);
6617 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6620 case PRAGMA_GCC_PCH_PREPROCESS:
6621 c_parser_error (parser, "%<#pragma GCC pch_preprocess%> must be first");
6622 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6626 if (id < PRAGMA_FIRST_EXTERNAL)
6628 if (context == pragma_external)
6631 c_parser_error (parser, "expected declaration specifiers");
6632 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6635 c_parser_omp_construct (parser);
6641 c_parser_consume_pragma (parser);
6642 c_invoke_pragma_handler (id);
6644 /* Skip to EOL, but suppress any error message. Those will have been
6645 generated by the handler routine through calling error, as opposed
6646 to calling c_parser_error. */
6647 parser->error = true;
6648 c_parser_skip_to_pragma_eol (parser);
6653 /* The interface the pragma parsers have to the lexer. */
6656 pragma_lex (tree *value)
6658 c_token *tok = c_parser_peek_token (the_parser);
6659 enum cpp_ttype ret = tok->type;
6661 *value = tok->value;
6662 if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF)
6666 if (ret == CPP_KEYWORD)
6668 c_parser_consume_token (the_parser);
6675 c_parser_pragma_pch_preprocess (c_parser *parser)
6679 c_parser_consume_pragma (parser);
6680 if (c_parser_next_token_is (parser, CPP_STRING))
6682 name = c_parser_peek_token (parser)->value;
6683 c_parser_consume_token (parser);
6686 c_parser_error (parser, "expected string literal");
6687 c_parser_skip_to_pragma_eol (parser);
6690 c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name));
6693 /* OpenMP 2.5 parsing routines. */
6695 /* Returns name of the next clause.
6696 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6697 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6698 returned and the token is consumed. */
6700 static pragma_omp_clause
6701 c_parser_omp_clause_name (c_parser *parser)
6703 pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE;
6705 if (c_parser_next_token_is_keyword (parser, RID_IF))
6706 result = PRAGMA_OMP_CLAUSE_IF;
6707 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
6708 result = PRAGMA_OMP_CLAUSE_DEFAULT;
6709 else if (c_parser_next_token_is (parser, CPP_NAME))
6711 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
6716 if (!strcmp ("collapse", p))
6717 result = PRAGMA_OMP_CLAUSE_COLLAPSE;
6718 else if (!strcmp ("copyin", p))
6719 result = PRAGMA_OMP_CLAUSE_COPYIN;
6720 else if (!strcmp ("copyprivate", p))
6721 result = PRAGMA_OMP_CLAUSE_COPYPRIVATE;
6724 if (!strcmp ("firstprivate", p))
6725 result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE;
6728 if (!strcmp ("lastprivate", p))
6729 result = PRAGMA_OMP_CLAUSE_LASTPRIVATE;
6732 if (!strcmp ("nowait", p))
6733 result = PRAGMA_OMP_CLAUSE_NOWAIT;
6734 else if (!strcmp ("num_threads", p))
6735 result = PRAGMA_OMP_CLAUSE_NUM_THREADS;
6738 if (!strcmp ("ordered", p))
6739 result = PRAGMA_OMP_CLAUSE_ORDERED;
6742 if (!strcmp ("private", p))
6743 result = PRAGMA_OMP_CLAUSE_PRIVATE;
6746 if (!strcmp ("reduction", p))
6747 result = PRAGMA_OMP_CLAUSE_REDUCTION;
6750 if (!strcmp ("schedule", p))
6751 result = PRAGMA_OMP_CLAUSE_SCHEDULE;
6752 else if (!strcmp ("shared", p))
6753 result = PRAGMA_OMP_CLAUSE_SHARED;
6756 if (!strcmp ("untied", p))
6757 result = PRAGMA_OMP_CLAUSE_UNTIED;
6762 if (result != PRAGMA_OMP_CLAUSE_NONE)
6763 c_parser_consume_token (parser);
6768 /* Validate that a clause of the given type does not already exist. */
6771 check_no_duplicate_clause (tree clauses, enum omp_clause_code code,
6776 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
6777 if (OMP_CLAUSE_CODE (c) == code)
6779 error ("too many %qs clauses", name);
6787 variable-list , identifier
6789 If KIND is nonzero, create the appropriate node and install the decl
6790 in OMP_CLAUSE_DECL and add the node to the head of the list.
6792 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6793 return the list created. */
6796 c_parser_omp_variable_list (c_parser *parser, enum omp_clause_code kind,
6799 if (c_parser_next_token_is_not (parser, CPP_NAME)
6800 || c_parser_peek_token (parser)->id_kind != C_ID_ID)
6801 c_parser_error (parser, "expected identifier");
6803 while (c_parser_next_token_is (parser, CPP_NAME)
6804 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
6806 tree t = lookup_name (c_parser_peek_token (parser)->value);
6809 undeclared_variable (c_parser_peek_token (parser)->value,
6810 c_parser_peek_token (parser)->location);
6811 else if (t == error_mark_node)
6815 tree u = build_omp_clause (kind);
6816 OMP_CLAUSE_DECL (u) = t;
6817 OMP_CLAUSE_CHAIN (u) = list;
6821 list = tree_cons (t, NULL_TREE, list);
6823 c_parser_consume_token (parser);
6825 if (c_parser_next_token_is_not (parser, CPP_COMMA))
6828 c_parser_consume_token (parser);
6834 /* Similarly, but expect leading and trailing parenthesis. This is a very
6835 common case for omp clauses. */
6838 c_parser_omp_var_list_parens (c_parser *parser, enum omp_clause_code kind,
6841 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6843 list = c_parser_omp_variable_list (parser, kind, list);
6844 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6850 collapse ( constant-expression ) */
6853 c_parser_omp_clause_collapse (c_parser *parser, tree list)
6855 tree c, num = error_mark_node;
6859 check_no_duplicate_clause (list, OMP_CLAUSE_COLLAPSE, "collapse");
6861 loc = c_parser_peek_token (parser)->location;
6862 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6864 num = c_parser_expr_no_commas (parser, NULL).value;
6865 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6867 if (num == error_mark_node)
6869 if (!INTEGRAL_TYPE_P (TREE_TYPE (num))
6870 || !host_integerp (num, 0)
6871 || (n = tree_low_cst (num, 0)) <= 0
6874 error ("%Hcollapse argument needs positive constant integer expression",
6878 c = build_omp_clause (OMP_CLAUSE_COLLAPSE);
6879 OMP_CLAUSE_COLLAPSE_EXPR (c) = num;
6880 OMP_CLAUSE_CHAIN (c) = list;
6885 copyin ( variable-list ) */
6888 c_parser_omp_clause_copyin (c_parser *parser, tree list)
6890 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYIN, list);
6894 copyprivate ( variable-list ) */
6897 c_parser_omp_clause_copyprivate (c_parser *parser, tree list)
6899 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYPRIVATE, list);
6903 default ( shared | none ) */
6906 c_parser_omp_clause_default (c_parser *parser, tree list)
6908 enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED;
6911 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6913 if (c_parser_next_token_is (parser, CPP_NAME))
6915 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
6920 if (strcmp ("none", p) != 0)
6922 kind = OMP_CLAUSE_DEFAULT_NONE;
6926 if (strcmp ("shared", p) != 0)
6928 kind = OMP_CLAUSE_DEFAULT_SHARED;
6935 c_parser_consume_token (parser);
6940 c_parser_error (parser, "expected %<none%> or %<shared%>");
6942 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6944 if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED)
6947 check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default");
6948 c = build_omp_clause (OMP_CLAUSE_DEFAULT);
6949 OMP_CLAUSE_CHAIN (c) = list;
6950 OMP_CLAUSE_DEFAULT_KIND (c) = kind;
6956 firstprivate ( variable-list ) */
6959 c_parser_omp_clause_firstprivate (c_parser *parser, tree list)
6961 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_FIRSTPRIVATE, list);
6965 if ( expression ) */
6968 c_parser_omp_clause_if (c_parser *parser, tree list)
6970 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6972 tree t = c_parser_paren_condition (parser);
6975 check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if");
6977 c = build_omp_clause (OMP_CLAUSE_IF);
6978 OMP_CLAUSE_IF_EXPR (c) = t;
6979 OMP_CLAUSE_CHAIN (c) = list;
6983 c_parser_error (parser, "expected %<(%>");
6989 lastprivate ( variable-list ) */
6992 c_parser_omp_clause_lastprivate (c_parser *parser, tree list)
6994 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_LASTPRIVATE, list);
7001 c_parser_omp_clause_nowait (c_parser *parser ATTRIBUTE_UNUSED, tree list)
7005 check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait");
7007 c = build_omp_clause (OMP_CLAUSE_NOWAIT);
7008 OMP_CLAUSE_CHAIN (c) = list;
7013 num_threads ( expression ) */
7016 c_parser_omp_clause_num_threads (c_parser *parser, tree list)
7018 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7020 location_t expr_loc = c_parser_peek_token (parser)->location;
7021 tree c, t = c_parser_expression (parser).value;
7023 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7025 if (!INTEGRAL_TYPE_P (TREE_TYPE (t)))
7027 c_parser_error (parser, "expected integer expression");
7031 /* Attempt to statically determine when the number isn't positive. */
7032 c = fold_build2 (LE_EXPR, boolean_type_node, t,
7033 build_int_cst (TREE_TYPE (t), 0));
7034 if (c == boolean_true_node)
7036 warning (0, "%H%<num_threads%> value must be positive", &expr_loc);
7037 t = integer_one_node;
7040 check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads");
7042 c = build_omp_clause (OMP_CLAUSE_NUM_THREADS);
7043 OMP_CLAUSE_NUM_THREADS_EXPR (c) = t;
7044 OMP_CLAUSE_CHAIN (c) = list;
7055 c_parser_omp_clause_ordered (c_parser *parser ATTRIBUTE_UNUSED, tree list)
7059 check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered");
7061 c = build_omp_clause (OMP_CLAUSE_ORDERED);
7062 OMP_CLAUSE_CHAIN (c) = list;
7067 private ( variable-list ) */
7070 c_parser_omp_clause_private (c_parser *parser, tree list)
7072 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_PRIVATE, list);
7076 reduction ( reduction-operator : variable-list )
7079 One of: + * - & ^ | && || */
7082 c_parser_omp_clause_reduction (c_parser *parser, tree list)
7084 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7086 enum tree_code code;
7088 switch (c_parser_peek_token (parser)->type)
7100 code = BIT_AND_EXPR;
7103 code = BIT_XOR_EXPR;
7106 code = BIT_IOR_EXPR;
7109 code = TRUTH_ANDIF_EXPR;
7112 code = TRUTH_ORIF_EXPR;
7115 c_parser_error (parser,
7116 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
7117 "%<^%>, %<|%>, %<&&%>, or %<||%>");
7118 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
7121 c_parser_consume_token (parser);
7122 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
7126 nl = c_parser_omp_variable_list (parser, OMP_CLAUSE_REDUCTION, list);
7127 for (c = nl; c != list; c = OMP_CLAUSE_CHAIN (c))
7128 OMP_CLAUSE_REDUCTION_CODE (c) = code;
7132 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7138 schedule ( schedule-kind )
7139 schedule ( schedule-kind , expression )
7142 static | dynamic | guided | runtime | auto
7146 c_parser_omp_clause_schedule (c_parser *parser, tree list)
7150 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7153 c = build_omp_clause (OMP_CLAUSE_SCHEDULE);
7155 if (c_parser_next_token_is (parser, CPP_NAME))
7157 tree kind = c_parser_peek_token (parser)->value;
7158 const char *p = IDENTIFIER_POINTER (kind);
7163 if (strcmp ("dynamic", p) != 0)
7165 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC;
7169 if (strcmp ("guided", p) != 0)
7171 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED;
7175 if (strcmp ("runtime", p) != 0)
7177 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME;
7184 else if (c_parser_next_token_is_keyword (parser, RID_STATIC))
7185 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC;
7186 else if (c_parser_next_token_is_keyword (parser, RID_AUTO))
7187 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO;
7191 c_parser_consume_token (parser);
7192 if (c_parser_next_token_is (parser, CPP_COMMA))
7195 c_parser_consume_token (parser);
7197 here = c_parser_peek_token (parser)->location;
7198 t = c_parser_expr_no_commas (parser, NULL).value;
7200 if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME)
7201 error ("%Hschedule %<runtime%> does not take "
7202 "a %<chunk_size%> parameter", &here);
7203 else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_AUTO)
7204 error ("%Hschedule %<auto%> does not take "
7205 "a %<chunk_size%> parameter", &here);
7206 else if (TREE_CODE (TREE_TYPE (t)) == INTEGER_TYPE)
7207 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t;
7209 c_parser_error (parser, "expected integer expression");
7211 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7214 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
7215 "expected %<,%> or %<)%>");
7217 check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule");
7218 OMP_CLAUSE_CHAIN (c) = list;
7222 c_parser_error (parser, "invalid schedule kind");
7223 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
7228 shared ( variable-list ) */
7231 c_parser_omp_clause_shared (c_parser *parser, tree list)
7233 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_SHARED, list);
7240 c_parser_omp_clause_untied (c_parser *parser ATTRIBUTE_UNUSED, tree list)
7244 /* FIXME: Should we allow duplicates? */
7245 check_no_duplicate_clause (list, OMP_CLAUSE_UNTIED, "untied");
7247 c = build_omp_clause (OMP_CLAUSE_UNTIED);
7248 OMP_CLAUSE_CHAIN (c) = list;
7252 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7253 is a bitmask in MASK. Return the list of clauses found; the result
7254 of clause default goes in *pdefault. */
7257 c_parser_omp_all_clauses (c_parser *parser, unsigned int mask,
7260 tree clauses = NULL;
7263 while (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7266 pragma_omp_clause c_kind;
7268 tree prev = clauses;
7270 if (!first && c_parser_next_token_is (parser, CPP_COMMA))
7271 c_parser_consume_token (parser);
7274 here = c_parser_peek_token (parser)->location;
7275 c_kind = c_parser_omp_clause_name (parser);
7279 case PRAGMA_OMP_CLAUSE_COLLAPSE:
7280 clauses = c_parser_omp_clause_collapse (parser, clauses);
7281 c_name = "collapse";
7283 case PRAGMA_OMP_CLAUSE_COPYIN:
7284 clauses = c_parser_omp_clause_copyin (parser, clauses);
7287 case PRAGMA_OMP_CLAUSE_COPYPRIVATE:
7288 clauses = c_parser_omp_clause_copyprivate (parser, clauses);
7289 c_name = "copyprivate";
7291 case PRAGMA_OMP_CLAUSE_DEFAULT:
7292 clauses = c_parser_omp_clause_default (parser, clauses);
7295 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE:
7296 clauses = c_parser_omp_clause_firstprivate (parser, clauses);
7297 c_name = "firstprivate";
7299 case PRAGMA_OMP_CLAUSE_IF:
7300 clauses = c_parser_omp_clause_if (parser, clauses);
7303 case PRAGMA_OMP_CLAUSE_LASTPRIVATE:
7304 clauses = c_parser_omp_clause_lastprivate (parser, clauses);
7305 c_name = "lastprivate";
7307 case PRAGMA_OMP_CLAUSE_NOWAIT:
7308 clauses = c_parser_omp_clause_nowait (parser, clauses);
7311 case PRAGMA_OMP_CLAUSE_NUM_THREADS:
7312 clauses = c_parser_omp_clause_num_threads (parser, clauses);
7313 c_name = "num_threads";
7315 case PRAGMA_OMP_CLAUSE_ORDERED:
7316 clauses = c_parser_omp_clause_ordered (parser, clauses);
7319 case PRAGMA_OMP_CLAUSE_PRIVATE:
7320 clauses = c_parser_omp_clause_private (parser, clauses);
7323 case PRAGMA_OMP_CLAUSE_REDUCTION:
7324 clauses = c_parser_omp_clause_reduction (parser, clauses);
7325 c_name = "reduction";
7327 case PRAGMA_OMP_CLAUSE_SCHEDULE:
7328 clauses = c_parser_omp_clause_schedule (parser, clauses);
7329 c_name = "schedule";
7331 case PRAGMA_OMP_CLAUSE_SHARED:
7332 clauses = c_parser_omp_clause_shared (parser, clauses);
7335 case PRAGMA_OMP_CLAUSE_UNTIED:
7336 clauses = c_parser_omp_clause_untied (parser, clauses);
7340 c_parser_error (parser, "expected %<#pragma omp%> clause");
7344 if (((mask >> c_kind) & 1) == 0 && !parser->error)
7346 /* Remove the invalid clause(s) from the list to avoid
7347 confusing the rest of the compiler. */
7349 error ("%H%qs is not valid for %qs", &here, c_name, where);
7354 c_parser_skip_to_pragma_eol (parser);
7356 return c_finish_omp_clauses (clauses);
7363 In practice, we're also interested in adding the statement to an
7364 outer node. So it is convenient if we work around the fact that
7365 c_parser_statement calls add_stmt. */
7368 c_parser_omp_structured_block (c_parser *parser)
7370 tree stmt = push_stmt_list ();
7371 c_parser_statement (parser);
7372 return pop_stmt_list (stmt);
7376 # pragma omp atomic new-line
7380 x binop= expr | x++ | ++x | x-- | --x
7382 +, *, -, /, &, ^, |, <<, >>
7384 where x is an lvalue expression with scalar type. */
7387 c_parser_omp_atomic (c_parser *parser)
7391 enum tree_code code;
7392 struct c_expr rhs_expr;
7394 c_parser_skip_to_pragma_eol (parser);
7396 lhs = c_parser_unary_expression (parser).value;
7397 switch (TREE_CODE (lhs))
7401 c_parser_skip_to_end_of_block_or_statement (parser);
7404 case PREINCREMENT_EXPR:
7405 case POSTINCREMENT_EXPR:
7406 lhs = TREE_OPERAND (lhs, 0);
7408 rhs = integer_one_node;
7411 case PREDECREMENT_EXPR:
7412 case POSTDECREMENT_EXPR:
7413 lhs = TREE_OPERAND (lhs, 0);
7415 rhs = integer_one_node;
7419 switch (c_parser_peek_token (parser)->type)
7425 code = TRUNC_DIV_EXPR;
7440 code = BIT_AND_EXPR;
7443 code = BIT_IOR_EXPR;
7446 code = BIT_XOR_EXPR;
7449 c_parser_error (parser,
7450 "invalid operator for %<#pragma omp atomic%>");
7454 c_parser_consume_token (parser);
7455 rhs_expr = c_parser_expression (parser);
7456 rhs_expr = default_function_array_conversion (rhs_expr);
7457 rhs = rhs_expr.value;
7460 stmt = c_finish_omp_atomic (code, lhs, rhs);
7461 if (stmt != error_mark_node)
7463 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7468 # pragma omp barrier new-line
7472 c_parser_omp_barrier (c_parser *parser)
7474 c_parser_consume_pragma (parser);
7475 c_parser_skip_to_pragma_eol (parser);
7477 c_finish_omp_barrier ();
7481 # pragma omp critical [(name)] new-line
7486 c_parser_omp_critical (c_parser *parser)
7488 tree stmt, name = NULL;
7490 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7492 c_parser_consume_token (parser);
7493 if (c_parser_next_token_is (parser, CPP_NAME))
7495 name = c_parser_peek_token (parser)->value;
7496 c_parser_consume_token (parser);
7497 c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7500 c_parser_error (parser, "expected identifier");
7502 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7503 c_parser_error (parser, "expected %<(%> or end of line");
7504 c_parser_skip_to_pragma_eol (parser);
7506 stmt = c_parser_omp_structured_block (parser);
7507 return c_finish_omp_critical (stmt, name);
7511 # pragma omp flush flush-vars[opt] new-line
7514 ( variable-list ) */
7517 c_parser_omp_flush (c_parser *parser)
7519 c_parser_consume_pragma (parser);
7520 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7521 c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL);
7522 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7523 c_parser_error (parser, "expected %<(%> or end of line");
7524 c_parser_skip_to_pragma_eol (parser);
7526 c_finish_omp_flush ();
7529 /* Parse the restricted form of the for statement allowed by OpenMP.
7530 The real trick here is to determine the loop control variable early
7531 so that we can push a new decl if necessary to make it private. */
7534 c_parser_omp_for_loop (c_parser *parser, tree clauses, tree *par_clauses)
7536 tree decl, cond, incr, save_break, save_cont, body, init, stmt, cl;
7537 tree declv, condv, incrv, initv, for_block = NULL, ret = NULL;
7539 bool fail = false, open_brace_parsed = false;
7540 int i, collapse = 1, nbraces = 0;
7542 for (cl = clauses; cl; cl = OMP_CLAUSE_CHAIN (cl))
7543 if (OMP_CLAUSE_CODE (cl) == OMP_CLAUSE_COLLAPSE)
7544 collapse = tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl), 0);
7546 gcc_assert (collapse >= 1);
7548 declv = make_tree_vec (collapse);
7549 initv = make_tree_vec (collapse);
7550 condv = make_tree_vec (collapse);
7551 incrv = make_tree_vec (collapse);
7553 if (!c_parser_next_token_is_keyword (parser, RID_FOR))
7555 c_parser_error (parser, "for statement expected");
7558 loc = c_parser_peek_token (parser)->location;
7559 c_parser_consume_token (parser);
7561 for (i = 0; i < collapse; i++)
7565 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7568 /* Parse the initialization declaration or expression. */
7569 if (c_parser_next_token_starts_declspecs (parser))
7573 = tree_cons (NULL, c_begin_compound_stmt (true), for_block);
7574 c_parser_declaration_or_fndef (parser, true, true, true, true);
7575 decl = check_for_loop_decls ();
7578 if (DECL_INITIAL (decl) == error_mark_node)
7579 decl = error_mark_node;
7582 else if (c_parser_next_token_is (parser, CPP_NAME)
7583 && c_parser_peek_2nd_token (parser)->type == CPP_EQ)
7585 struct c_expr init_exp;
7587 decl = c_parser_postfix_expression (parser).value;
7589 c_parser_require (parser, CPP_EQ, "expected %<=%>");
7591 init_exp = c_parser_expr_no_commas (parser, NULL);
7592 init_exp = default_function_array_conversion (init_exp);
7593 init = build_modify_expr (decl, NOP_EXPR, init_exp.value);
7594 init = c_process_expr_stmt (init);
7596 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7601 c_parser_error (parser,
7602 "expected iteration declaration or initialization");
7603 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
7609 /* Parse the loop condition. */
7611 if (c_parser_next_token_is_not (parser, CPP_SEMICOLON))
7613 cond = c_parser_expression_conv (parser).value;
7614 cond = c_objc_common_truthvalue_conversion (input_location, cond);
7615 if (CAN_HAVE_LOCATION_P (cond))
7616 SET_EXPR_LOCATION (cond, input_location);
7618 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7620 /* Parse the increment expression. */
7622 if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN))
7623 incr = c_process_expr_stmt (c_parser_expression (parser).value);
7624 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7626 if (decl == NULL || decl == error_mark_node || init == error_mark_node)
7630 TREE_VEC_ELT (declv, i) = decl;
7631 TREE_VEC_ELT (initv, i) = init;
7632 TREE_VEC_ELT (condv, i) = cond;
7633 TREE_VEC_ELT (incrv, i) = incr;
7637 if (i == collapse - 1)
7640 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
7641 in between the collapsed for loops to be still considered perfectly
7642 nested. Hopefully the final version clarifies this.
7643 For now handle (multiple) {'s and empty statements. */
7646 if (c_parser_next_token_is_keyword (parser, RID_FOR))
7648 c_parser_consume_token (parser);
7651 else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
7653 c_parser_consume_token (parser);
7657 && c_parser_next_token_is (parser, CPP_SEMICOLON))
7658 c_parser_consume_token (parser);
7661 c_parser_error (parser, "not enough perfectly nested loops");
7664 open_brace_parsed = true;
7674 nbraces += bracecount;
7677 save_break = c_break_label;
7678 c_break_label = size_one_node;
7679 save_cont = c_cont_label;
7680 c_cont_label = NULL_TREE;
7681 body = push_stmt_list ();
7683 if (open_brace_parsed)
7685 stmt = c_begin_compound_stmt (true);
7686 c_parser_compound_statement_nostart (parser);
7687 add_stmt (c_end_compound_stmt (stmt, true));
7690 add_stmt (c_parser_c99_block_statement (parser));
7692 add_stmt (build1 (LABEL_EXPR, void_type_node, c_cont_label));
7694 body = pop_stmt_list (body);
7695 c_break_label = save_break;
7696 c_cont_label = save_cont;
7700 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7702 c_parser_consume_token (parser);
7705 else if (c_parser_next_token_is (parser, CPP_SEMICOLON))
7706 c_parser_consume_token (parser);
7709 c_parser_error (parser, "collapsed loops not perfectly nested");
7712 stmt = c_begin_compound_stmt (true);
7714 c_parser_compound_statement_nostart (parser);
7715 body = c_end_compound_stmt (stmt, true);
7722 /* Only bother calling c_finish_omp_for if we haven't already generated
7723 an error from the initialization parsing. */
7726 stmt = c_finish_omp_for (loc, declv, initv, condv, incrv, body, NULL);
7729 if (par_clauses != NULL)
7732 for (c = par_clauses; *c ; )
7733 if (OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_FIRSTPRIVATE
7734 && OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_LASTPRIVATE)
7735 c = &OMP_CLAUSE_CHAIN (*c);
7738 for (i = 0; i < collapse; i++)
7739 if (TREE_VEC_ELT (declv, i) == OMP_CLAUSE_DECL (*c))
7742 c = &OMP_CLAUSE_CHAIN (*c);
7743 else if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_FIRSTPRIVATE)
7745 error ("%Hiteration variable %qD should not be firstprivate",
7746 &loc, OMP_CLAUSE_DECL (*c));
7747 *c = OMP_CLAUSE_CHAIN (*c);
7751 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
7752 change it to shared (decl) in
7753 OMP_PARALLEL_CLAUSES. */
7754 tree l = build_omp_clause (OMP_CLAUSE_LASTPRIVATE);
7755 OMP_CLAUSE_DECL (l) = OMP_CLAUSE_DECL (*c);
7756 OMP_CLAUSE_CHAIN (l) = clauses;
7758 OMP_CLAUSE_SET_CODE (*c, OMP_CLAUSE_SHARED);
7762 OMP_FOR_CLAUSES (stmt) = clauses;
7769 stmt = c_end_compound_stmt (TREE_VALUE (for_block), true);
7771 for_block = TREE_CHAIN (for_block);
7777 #pragma omp for for-clause[optseq] new-line
7781 #define OMP_FOR_CLAUSE_MASK \
7782 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7783 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7784 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7785 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7786 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7787 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7788 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
7789 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7792 c_parser_omp_for (c_parser *parser)
7794 tree block, clauses, ret;
7796 clauses = c_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK,
7799 block = c_begin_compound_stmt (true);
7800 ret = c_parser_omp_for_loop (parser, clauses, NULL);
7801 block = c_end_compound_stmt (block, true);
7808 # pragma omp master new-line
7813 c_parser_omp_master (c_parser *parser)
7815 c_parser_skip_to_pragma_eol (parser);
7816 return c_finish_omp_master (c_parser_omp_structured_block (parser));
7820 # pragma omp ordered new-line
7825 c_parser_omp_ordered (c_parser *parser)
7827 c_parser_skip_to_pragma_eol (parser);
7828 return c_finish_omp_ordered (c_parser_omp_structured_block (parser));
7834 { section-sequence }
7837 section-directive[opt] structured-block
7838 section-sequence section-directive structured-block */
7841 c_parser_omp_sections_scope (c_parser *parser)
7844 bool error_suppress = false;
7847 if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
7849 /* Avoid skipping until the end of the block. */
7850 parser->error = false;
7854 stmt = push_stmt_list ();
7856 loc = c_parser_peek_token (parser)->location;
7857 if (c_parser_peek_token (parser)->pragma_kind != PRAGMA_OMP_SECTION)
7859 substmt = push_stmt_list ();
7863 c_parser_statement (parser);
7865 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
7867 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7869 if (c_parser_next_token_is (parser, CPP_EOF))
7873 substmt = pop_stmt_list (substmt);
7874 substmt = build1 (OMP_SECTION, void_type_node, substmt);
7875 SET_EXPR_LOCATION (substmt, loc);
7881 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7883 if (c_parser_next_token_is (parser, CPP_EOF))
7886 loc = c_parser_peek_token (parser)->location;
7887 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
7889 c_parser_consume_pragma (parser);
7890 c_parser_skip_to_pragma_eol (parser);
7891 error_suppress = false;
7893 else if (!error_suppress)
7895 error ("%Hexpected %<#pragma omp section%> or %<}%>",
7897 error_suppress = true;
7900 substmt = c_parser_omp_structured_block (parser);
7901 substmt = build1 (OMP_SECTION, void_type_node, substmt);
7902 SET_EXPR_LOCATION (substmt, loc);
7905 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE,
7906 "expected %<#pragma omp section%> or %<}%>");
7908 substmt = pop_stmt_list (stmt);
7910 stmt = make_node (OMP_SECTIONS);
7911 TREE_TYPE (stmt) = void_type_node;
7912 OMP_SECTIONS_BODY (stmt) = substmt;
7914 return add_stmt (stmt);
7918 # pragma omp sections sections-clause[optseq] newline
7922 #define OMP_SECTIONS_CLAUSE_MASK \
7923 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7924 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7925 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7926 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7927 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7930 c_parser_omp_sections (c_parser *parser)
7932 tree block, clauses, ret;
7934 clauses = c_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK,
7935 "#pragma omp sections");
7937 block = c_begin_compound_stmt (true);
7938 ret = c_parser_omp_sections_scope (parser);
7940 OMP_SECTIONS_CLAUSES (ret) = clauses;
7941 block = c_end_compound_stmt (block, true);
7948 # pragma parallel parallel-clause new-line
7949 # pragma parallel for parallel-for-clause new-line
7950 # pragma parallel sections parallel-sections-clause new-line
7953 #define OMP_PARALLEL_CLAUSE_MASK \
7954 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
7955 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7956 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7957 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
7958 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
7959 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
7960 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7961 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
7964 c_parser_omp_parallel (c_parser *parser)
7966 enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL;
7967 const char *p_name = "#pragma omp parallel";
7968 tree stmt, clauses, par_clause, ws_clause, block;
7969 unsigned int mask = OMP_PARALLEL_CLAUSE_MASK;
7971 if (c_parser_next_token_is_keyword (parser, RID_FOR))
7973 c_parser_consume_token (parser);
7974 p_kind = PRAGMA_OMP_PARALLEL_FOR;
7975 p_name = "#pragma omp parallel for";
7976 mask |= OMP_FOR_CLAUSE_MASK;
7977 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
7979 else if (c_parser_next_token_is (parser, CPP_NAME))
7981 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
7982 if (strcmp (p, "sections") == 0)
7984 c_parser_consume_token (parser);
7985 p_kind = PRAGMA_OMP_PARALLEL_SECTIONS;
7986 p_name = "#pragma omp parallel sections";
7987 mask |= OMP_SECTIONS_CLAUSE_MASK;
7988 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
7992 clauses = c_parser_omp_all_clauses (parser, mask, p_name);
7996 case PRAGMA_OMP_PARALLEL:
7997 block = c_begin_omp_parallel ();
7998 c_parser_statement (parser);
7999 stmt = c_finish_omp_parallel (clauses, block);
8002 case PRAGMA_OMP_PARALLEL_FOR:
8003 block = c_begin_omp_parallel ();
8004 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
8005 c_parser_omp_for_loop (parser, ws_clause, &par_clause);
8006 stmt = c_finish_omp_parallel (par_clause, block);
8007 OMP_PARALLEL_COMBINED (stmt) = 1;
8010 case PRAGMA_OMP_PARALLEL_SECTIONS:
8011 block = c_begin_omp_parallel ();
8012 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
8013 stmt = c_parser_omp_sections_scope (parser);
8015 OMP_SECTIONS_CLAUSES (stmt) = ws_clause;
8016 stmt = c_finish_omp_parallel (par_clause, block);
8017 OMP_PARALLEL_COMBINED (stmt) = 1;
8028 # pragma omp single single-clause[optseq] new-line
8032 #define OMP_SINGLE_CLAUSE_MASK \
8033 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8034 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8035 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
8036 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
8039 c_parser_omp_single (c_parser *parser)
8041 tree stmt = make_node (OMP_SINGLE);
8042 TREE_TYPE (stmt) = void_type_node;
8044 OMP_SINGLE_CLAUSES (stmt)
8045 = c_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK,
8046 "#pragma omp single");
8047 OMP_SINGLE_BODY (stmt) = c_parser_omp_structured_block (parser);
8049 return add_stmt (stmt);
8053 # pragma omp task task-clause[optseq] new-line
8056 #define OMP_TASK_CLAUSE_MASK \
8057 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8058 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
8059 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8060 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8061 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8062 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
8065 c_parser_omp_task (c_parser *parser)
8067 tree clauses, block;
8069 clauses = c_parser_omp_all_clauses (parser, OMP_TASK_CLAUSE_MASK,
8070 "#pragma omp task");
8072 block = c_begin_omp_task ();
8073 c_parser_statement (parser);
8074 return c_finish_omp_task (clauses, block);
8078 # pragma omp taskwait new-line
8082 c_parser_omp_taskwait (c_parser *parser)
8084 c_parser_consume_pragma (parser);
8085 c_parser_skip_to_pragma_eol (parser);
8087 c_finish_omp_taskwait ();
8090 /* Main entry point to parsing most OpenMP pragmas. */
8093 c_parser_omp_construct (c_parser *parser)
8095 enum pragma_kind p_kind;
8099 loc = c_parser_peek_token (parser)->location;
8100 p_kind = c_parser_peek_token (parser)->pragma_kind;
8101 c_parser_consume_pragma (parser);
8103 /* For all constructs below except #pragma omp atomic
8104 MUST_NOT_THROW catch handlers are needed when exceptions
8106 if (p_kind != PRAGMA_OMP_ATOMIC)
8107 c_maybe_initialize_eh ();
8111 case PRAGMA_OMP_ATOMIC:
8112 c_parser_omp_atomic (parser);
8114 case PRAGMA_OMP_CRITICAL:
8115 stmt = c_parser_omp_critical (parser);
8117 case PRAGMA_OMP_FOR:
8118 stmt = c_parser_omp_for (parser);
8120 case PRAGMA_OMP_MASTER:
8121 stmt = c_parser_omp_master (parser);
8123 case PRAGMA_OMP_ORDERED:
8124 stmt = c_parser_omp_ordered (parser);
8126 case PRAGMA_OMP_PARALLEL:
8127 stmt = c_parser_omp_parallel (parser);
8129 case PRAGMA_OMP_SECTIONS:
8130 stmt = c_parser_omp_sections (parser);
8132 case PRAGMA_OMP_SINGLE:
8133 stmt = c_parser_omp_single (parser);
8135 case PRAGMA_OMP_TASK:
8136 stmt = c_parser_omp_task (parser);
8143 SET_EXPR_LOCATION (stmt, loc);
8148 # pragma omp threadprivate (variable-list) */
8151 c_parser_omp_threadprivate (c_parser *parser)
8155 c_parser_consume_pragma (parser);
8156 vars = c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL);
8158 /* Mark every variable in VARS to be assigned thread local storage. */
8159 for (t = vars; t; t = TREE_CHAIN (t))
8161 tree v = TREE_PURPOSE (t);
8163 /* If V had already been marked threadprivate, it doesn't matter
8164 whether it had been used prior to this point. */
8165 if (TREE_CODE (v) != VAR_DECL)
8166 error ("%qD is not a variable", v);
8167 else if (TREE_USED (v) && !C_DECL_THREADPRIVATE_P (v))
8168 error ("%qE declared %<threadprivate%> after first use", v);
8169 else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v))
8170 error ("automatic variable %qE cannot be %<threadprivate%>", v);
8171 else if (TREE_TYPE (v) == error_mark_node)
8173 else if (! COMPLETE_TYPE_P (TREE_TYPE (v)))
8174 error ("%<threadprivate%> %qE has incomplete type", v);
8177 if (! DECL_THREAD_LOCAL_P (v))
8179 DECL_TLS_MODEL (v) = decl_default_tls_model (v);
8180 /* If rtl has been already set for this var, call
8181 make_decl_rtl once again, so that encode_section_info
8182 has a chance to look at the new decl flags. */
8183 if (DECL_RTL_SET_P (v))
8186 C_DECL_THREADPRIVATE_P (v) = 1;
8190 c_parser_skip_to_pragma_eol (parser);
8194 /* Parse a single source file. */
8199 /* Use local storage to begin. If the first token is a pragma, parse it.
8200 If it is #pragma GCC pch_preprocess, then this will load a PCH file
8201 which will cause garbage collection. */
8204 memset (&tparser, 0, sizeof tparser);
8205 the_parser = &tparser;
8207 if (c_parser_peek_token (&tparser)->pragma_kind == PRAGMA_GCC_PCH_PREPROCESS)
8208 c_parser_pragma_pch_preprocess (&tparser);
8210 the_parser = GGC_NEW (c_parser);
8211 *the_parser = tparser;
8213 c_parser_translation_unit (the_parser);
8217 #include "gt-c-parser.h"