1 /* Parser for C and Objective-C.
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 Parser actions based on the old Bison parser; structure somewhat
7 influenced by and fragments based on the C++ parser.
9 This file is part of GCC.
11 GCC is free software; you can redistribute it and/or modify it under
12 the terms of the GNU General Public License as published by the Free
13 Software Foundation; either version 3, or (at your option) any later
16 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
17 WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 You should have received a copy of the GNU General Public License
22 along with GCC; see the file COPYING3. If not see
23 <http://www.gnu.org/licenses/>. */
27 Make sure all relevant comments, and all relevant code from all
28 actions, brought over from old parser. Verify exact correspondence
31 Add testcases covering every input symbol in every state in old and
34 Include full syntax for GNU C, including erroneous cases accepted
35 with error messages, in syntax productions in comments.
37 Make more diagnostics in the front end generally take an explicit
38 location rather than implicitly using input_location. */
42 #include "coretypes.h"
46 #include "langhooks.h"
62 /* Initialization routine for this file. */
67 /* The only initialization required is of the reserved word
78 mask |= D_ASM | D_EXT;
82 if (!c_dialect_objc ())
83 mask |= D_OBJC | D_CXX_OBJC;
85 ridpointers = GGC_CNEWVEC (tree, (int) RID_MAX);
86 for (i = 0; i < num_c_common_reswords; i++)
88 /* If a keyword is disabled, do not enter it into the table
89 and so create a canonical spelling that isn't a keyword. */
90 if (c_common_reswords[i].disable & mask)
93 && (c_common_reswords[i].disable & D_CXXWARN))
95 id = get_identifier (c_common_reswords[i].word);
96 C_SET_RID_CODE (id, RID_CXX_COMPAT_WARN);
97 C_IS_RESERVED_WORD (id) = 1;
102 id = get_identifier (c_common_reswords[i].word);
103 C_SET_RID_CODE (id, c_common_reswords[i].rid);
104 C_IS_RESERVED_WORD (id) = 1;
105 ridpointers [(int) c_common_reswords[i].rid] = id;
109 /* The C lexer intermediates between the lexer in cpplib and c-lex.c
110 and the C parser. Unlike the C++ lexer, the parser structure
111 stores the lexer information instead of using a separate structure.
112 Identifiers are separated into ordinary identifiers, type names,
113 keywords and some other Objective-C types of identifiers, and some
114 look-ahead is maintained.
116 ??? It might be a good idea to lex the whole file up front (as for
117 C++). It would then be possible to share more of the C and C++
118 lexer code, if desired. */
120 /* The following local token type is used. */
123 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
125 /* More information about the type of a CPP_NAME token. */
126 typedef enum c_id_kind {
127 /* An ordinary identifier. */
129 /* An identifier declared as a typedef name. */
131 /* An identifier declared as an Objective-C class name. */
133 /* Not an identifier. */
137 /* A single C token after string literal concatenation and conversion
138 of preprocessing tokens to tokens. */
139 typedef struct c_token GTY (())
141 /* The kind of token. */
142 ENUM_BITFIELD (cpp_ttype) type : 8;
143 /* If this token is a CPP_NAME, this value indicates whether also
144 declared as some kind of type. Otherwise, it is C_ID_NONE. */
145 ENUM_BITFIELD (c_id_kind) id_kind : 8;
146 /* If this token is a keyword, this value indicates which keyword.
147 Otherwise, this value is RID_MAX. */
148 ENUM_BITFIELD (rid) keyword : 8;
149 /* If this token is a CPP_PRAGMA, this indicates the pragma that
150 was seen. Otherwise it is PRAGMA_NONE. */
151 ENUM_BITFIELD (pragma_kind) pragma_kind : 8;
152 /* The value associated with this token, if any. */
154 /* The location at which this token was found. */
158 /* A parser structure recording information about the state and
159 context of parsing. Includes lexer information with up to two
160 tokens of look-ahead; more are not needed for C. */
161 typedef struct c_parser GTY(())
163 /* The look-ahead tokens. */
165 /* How many look-ahead tokens are available (0, 1 or 2). */
167 /* True if a syntax error is being recovered from; false otherwise.
168 c_parser_error sets this flag. It should clear this flag when
169 enough tokens have been consumed to recover from the error. */
170 BOOL_BITFIELD error : 1;
171 /* True if we're processing a pragma, and shouldn't automatically
172 consume CPP_PRAGMA_EOL. */
173 BOOL_BITFIELD in_pragma : 1;
174 /* True if we're parsing the outermost block of an if statement. */
175 BOOL_BITFIELD in_if_block : 1;
176 /* True if we want to lex an untranslated string. */
177 BOOL_BITFIELD lex_untranslated_string : 1;
178 /* Objective-C specific parser/lexer information. */
179 BOOL_BITFIELD objc_pq_context : 1;
180 /* The following flag is needed to contextualize Objective-C lexical
181 analysis. In some cases (e.g., 'int NSObject;'), it is
182 undesirable to bind an identifier to an Objective-C class, even
183 if a class with that name exists. */
184 BOOL_BITFIELD objc_need_raw_identifier : 1;
188 /* The actual parser and external interface. ??? Does this need to be
189 garbage-collected? */
191 static GTY (()) c_parser *the_parser;
194 /* Read in and lex a single token, storing it in *TOKEN. */
197 c_lex_one_token (c_parser *parser, c_token *token)
199 timevar_push (TV_LEX);
201 token->type = c_lex_with_flags (&token->value, &token->location, NULL,
202 (parser->lex_untranslated_string
203 ? C_LEX_STRING_NO_TRANSLATE : 0));
204 token->id_kind = C_ID_NONE;
205 token->keyword = RID_MAX;
206 token->pragma_kind = PRAGMA_NONE;
214 bool objc_force_identifier = parser->objc_need_raw_identifier;
215 if (c_dialect_objc ())
216 parser->objc_need_raw_identifier = false;
218 if (C_IS_RESERVED_WORD (token->value))
220 enum rid rid_code = C_RID_CODE (token->value);
222 if (rid_code == RID_CXX_COMPAT_WARN)
224 warning_at (token->location,
226 "identifier %qs conflicts with C++ keyword",
227 IDENTIFIER_POINTER (token->value));
229 else if (c_dialect_objc ())
231 if (!objc_is_reserved_word (token->value)
232 && (!OBJC_IS_PQ_KEYWORD (rid_code)
233 || parser->objc_pq_context))
235 /* Return the canonical spelling for this keyword. */
236 token->value = ridpointers[(int) rid_code];
237 token->type = CPP_KEYWORD;
238 token->keyword = rid_code;
244 token->type = CPP_KEYWORD;
245 token->keyword = rid_code;
250 decl = lookup_name (token->value);
253 if (TREE_CODE (decl) == TYPE_DECL)
255 token->id_kind = C_ID_TYPENAME;
259 else if (c_dialect_objc ())
261 tree objc_interface_decl = objc_is_class_name (token->value);
262 /* Objective-C class names are in the same namespace as
263 variables and typedefs, and hence are shadowed by local
265 if (objc_interface_decl
266 && (global_bindings_p ()
267 || (!objc_force_identifier && !decl)))
269 token->value = objc_interface_decl;
270 token->id_kind = C_ID_CLASSNAME;
274 token->id_kind = C_ID_ID;
278 /* This only happens in Objective-C; it must be a keyword. */
279 token->type = CPP_KEYWORD;
280 token->keyword = C_RID_CODE (token->value);
284 case CPP_CLOSE_PAREN:
286 /* These tokens may affect the interpretation of any identifiers
287 following, if doing Objective-C. */
288 if (c_dialect_objc ())
289 parser->objc_need_raw_identifier = false;
292 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
293 token->pragma_kind = (enum pragma_kind) TREE_INT_CST_LOW (token->value);
299 timevar_pop (TV_LEX);
302 /* Return a pointer to the next token from PARSER, reading it in if
305 static inline c_token *
306 c_parser_peek_token (c_parser *parser)
308 if (parser->tokens_avail == 0)
310 c_lex_one_token (parser, &parser->tokens[0]);
311 parser->tokens_avail = 1;
313 return &parser->tokens[0];
316 /* Return true if the next token from PARSER has the indicated
320 c_parser_next_token_is (c_parser *parser, enum cpp_ttype type)
322 return c_parser_peek_token (parser)->type == type;
325 /* Return true if the next token from PARSER does not have the
329 c_parser_next_token_is_not (c_parser *parser, enum cpp_ttype type)
331 return !c_parser_next_token_is (parser, type);
334 /* Return true if the next token from PARSER is the indicated
338 c_parser_next_token_is_keyword (c_parser *parser, enum rid keyword)
340 return c_parser_peek_token (parser)->keyword == keyword;
343 /* Return true if TOKEN can start a type name,
346 c_token_starts_typename (c_token *token)
351 switch (token->id_kind)
358 gcc_assert (c_dialect_objc ());
364 switch (token->keyword)
396 if (c_dialect_objc ())
404 /* Return true if the next token from PARSER can start a type name,
407 c_parser_next_token_starts_typename (c_parser *parser)
409 c_token *token = c_parser_peek_token (parser);
410 return c_token_starts_typename (token);
413 /* Return true if TOKEN can start declaration specifiers, false
416 c_token_starts_declspecs (c_token *token)
421 switch (token->id_kind)
428 gcc_assert (c_dialect_objc ());
434 switch (token->keyword)
473 if (c_dialect_objc ())
481 /* Return true if the next token from PARSER can start declaration
482 specifiers, false otherwise. */
484 c_parser_next_token_starts_declspecs (c_parser *parser)
486 c_token *token = c_parser_peek_token (parser);
487 return c_token_starts_declspecs (token);
490 /* Return a pointer to the next-but-one token from PARSER, reading it
491 in if necessary. The next token is already read in. */
494 c_parser_peek_2nd_token (c_parser *parser)
496 if (parser->tokens_avail >= 2)
497 return &parser->tokens[1];
498 gcc_assert (parser->tokens_avail == 1);
499 gcc_assert (parser->tokens[0].type != CPP_EOF);
500 gcc_assert (parser->tokens[0].type != CPP_PRAGMA_EOL);
501 c_lex_one_token (parser, &parser->tokens[1]);
502 parser->tokens_avail = 2;
503 return &parser->tokens[1];
506 /* Consume the next token from PARSER. */
509 c_parser_consume_token (c_parser *parser)
511 gcc_assert (parser->tokens_avail >= 1);
512 gcc_assert (parser->tokens[0].type != CPP_EOF);
513 gcc_assert (!parser->in_pragma || parser->tokens[0].type != CPP_PRAGMA_EOL);
514 gcc_assert (parser->error || parser->tokens[0].type != CPP_PRAGMA);
515 if (parser->tokens_avail == 2)
516 parser->tokens[0] = parser->tokens[1];
517 parser->tokens_avail--;
520 /* Expect the current token to be a #pragma. Consume it and remember
521 that we've begun parsing a pragma. */
524 c_parser_consume_pragma (c_parser *parser)
526 gcc_assert (!parser->in_pragma);
527 gcc_assert (parser->tokens_avail >= 1);
528 gcc_assert (parser->tokens[0].type == CPP_PRAGMA);
529 if (parser->tokens_avail == 2)
530 parser->tokens[0] = parser->tokens[1];
531 parser->tokens_avail--;
532 parser->in_pragma = true;
535 /* Update the globals input_location and in_system_header from
538 c_parser_set_source_position_from_token (c_token *token)
540 if (token->type != CPP_EOF)
542 input_location = token->location;
546 /* Issue a diagnostic of the form
547 FILE:LINE: MESSAGE before TOKEN
548 where TOKEN is the next token in the input stream of PARSER.
549 MESSAGE (specified by the caller) is usually of the form "expected
552 Do not issue a diagnostic if still recovering from an error.
554 ??? This is taken from the C++ parser, but building up messages in
555 this way is not i18n-friendly and some other approach should be
559 c_parser_error (c_parser *parser, const char *gmsgid)
561 c_token *token = c_parser_peek_token (parser);
564 parser->error = true;
567 /* This diagnostic makes more sense if it is tagged to the line of
568 the token we just peeked at. */
569 c_parser_set_source_position_from_token (token);
570 c_parse_error (gmsgid,
571 /* Because c_parse_error does not understand
572 CPP_KEYWORD, keywords are treated like
574 (token->type == CPP_KEYWORD ? CPP_NAME : token->type),
578 /* If the next token is of the indicated TYPE, consume it. Otherwise,
579 issue the error MSGID. If MSGID is NULL then a message has already
580 been produced and no message will be produced this time. Returns
581 true if found, false otherwise. */
584 c_parser_require (c_parser *parser,
588 if (c_parser_next_token_is (parser, type))
590 c_parser_consume_token (parser);
595 c_parser_error (parser, msgid);
600 /* If the next token is the indicated keyword, consume it. Otherwise,
601 issue the error MSGID. Returns true if found, false otherwise. */
604 c_parser_require_keyword (c_parser *parser,
608 if (c_parser_next_token_is_keyword (parser, keyword))
610 c_parser_consume_token (parser);
615 c_parser_error (parser, msgid);
620 /* Like c_parser_require, except that tokens will be skipped until the
621 desired token is found. An error message is still produced if the
622 next token is not as expected. If MSGID is NULL then a message has
623 already been produced and no message will be produced this
627 c_parser_skip_until_found (c_parser *parser,
631 unsigned nesting_depth = 0;
633 if (c_parser_require (parser, type, msgid))
636 /* Skip tokens until the desired token is found. */
639 /* Peek at the next token. */
640 c_token *token = c_parser_peek_token (parser);
641 /* If we've reached the token we want, consume it and stop. */
642 if (token->type == type && !nesting_depth)
644 c_parser_consume_token (parser);
648 /* If we've run out of tokens, stop. */
649 if (token->type == CPP_EOF)
651 if (token->type == CPP_PRAGMA_EOL && parser->in_pragma)
653 if (token->type == CPP_OPEN_BRACE
654 || token->type == CPP_OPEN_PAREN
655 || token->type == CPP_OPEN_SQUARE)
657 else if (token->type == CPP_CLOSE_BRACE
658 || token->type == CPP_CLOSE_PAREN
659 || token->type == CPP_CLOSE_SQUARE)
661 if (nesting_depth-- == 0)
664 /* Consume this token. */
665 c_parser_consume_token (parser);
667 parser->error = false;
670 /* Skip tokens until the end of a parameter is found, but do not
671 consume the comma, semicolon or closing delimiter. */
674 c_parser_skip_to_end_of_parameter (c_parser *parser)
676 unsigned nesting_depth = 0;
680 c_token *token = c_parser_peek_token (parser);
681 if ((token->type == CPP_COMMA || token->type == CPP_SEMICOLON)
684 /* If we've run out of tokens, stop. */
685 if (token->type == CPP_EOF)
687 if (token->type == CPP_PRAGMA_EOL && parser->in_pragma)
689 if (token->type == CPP_OPEN_BRACE
690 || token->type == CPP_OPEN_PAREN
691 || token->type == CPP_OPEN_SQUARE)
693 else if (token->type == CPP_CLOSE_BRACE
694 || token->type == CPP_CLOSE_PAREN
695 || token->type == CPP_CLOSE_SQUARE)
697 if (nesting_depth-- == 0)
700 /* Consume this token. */
701 c_parser_consume_token (parser);
703 parser->error = false;
706 /* Expect to be at the end of the pragma directive and consume an
707 end of line marker. */
710 c_parser_skip_to_pragma_eol (c_parser *parser)
712 gcc_assert (parser->in_pragma);
713 parser->in_pragma = false;
715 if (!c_parser_require (parser, CPP_PRAGMA_EOL, "expected end of line"))
718 c_token *token = c_parser_peek_token (parser);
719 if (token->type == CPP_EOF)
721 if (token->type == CPP_PRAGMA_EOL)
723 c_parser_consume_token (parser);
726 c_parser_consume_token (parser);
729 parser->error = false;
732 /* Skip tokens until we have consumed an entire block, or until we
733 have consumed a non-nested ';'. */
736 c_parser_skip_to_end_of_block_or_statement (c_parser *parser)
738 unsigned nesting_depth = 0;
739 bool save_error = parser->error;
745 /* Peek at the next token. */
746 token = c_parser_peek_token (parser);
754 if (parser->in_pragma)
759 /* If the next token is a ';', we have reached the
760 end of the statement. */
763 /* Consume the ';'. */
764 c_parser_consume_token (parser);
769 case CPP_CLOSE_BRACE:
770 /* If the next token is a non-nested '}', then we have
771 reached the end of the current block. */
772 if (nesting_depth == 0 || --nesting_depth == 0)
774 c_parser_consume_token (parser);
780 /* If it the next token is a '{', then we are entering a new
781 block. Consume the entire block. */
786 /* If we see a pragma, consume the whole thing at once. We
787 have some safeguards against consuming pragmas willy-nilly.
788 Normally, we'd expect to be here with parser->error set,
789 which disables these safeguards. But it's possible to get
790 here for secondary error recovery, after parser->error has
792 c_parser_consume_pragma (parser);
793 c_parser_skip_to_pragma_eol (parser);
794 parser->error = save_error;
801 c_parser_consume_token (parser);
805 parser->error = false;
808 /* CPP's options (initialized by c-opts.c). */
809 extern cpp_options *cpp_opts;
811 /* Save the warning flags which are controlled by __extension__. */
814 disable_extension_diagnostics (void)
817 | (warn_pointer_arith << 1)
818 | (warn_traditional << 2)
820 | (warn_long_long << 4)
821 | (cpp_opts->warn_long_long << 5));
822 cpp_opts->pedantic = pedantic = 0;
823 warn_pointer_arith = 0;
824 cpp_opts->warn_traditional = warn_traditional = 0;
827 cpp_opts->warn_long_long = 0;
831 /* Restore the warning flags which are controlled by __extension__.
832 FLAGS is the return value from disable_extension_diagnostics. */
835 restore_extension_diagnostics (int flags)
837 cpp_opts->pedantic = pedantic = flags & 1;
838 warn_pointer_arith = (flags >> 1) & 1;
839 cpp_opts->warn_traditional = warn_traditional = (flags >> 2) & 1;
840 flag_iso = (flags >> 3) & 1;
841 warn_long_long = (flags >> 4) & 1;
842 cpp_opts->warn_long_long = (flags >> 5) & 1;
845 /* Possibly kinds of declarator to parse. */
846 typedef enum c_dtr_syn {
847 /* A normal declarator with an identifier. */
849 /* An abstract declarator (maybe empty). */
851 /* A parameter declarator: may be either, but after a type name does
852 not redeclare a typedef name as an identifier if it can
853 alternatively be interpreted as a typedef name; see DR#009,
854 applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
855 following DR#249. For example, given a typedef T, "int T" and
856 "int *T" are valid parameter declarations redeclaring T, while
857 "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
858 abstract declarators rather than involving redundant parentheses;
859 the same applies with attributes inside the parentheses before
864 static void c_parser_external_declaration (c_parser *);
865 static void c_parser_asm_definition (c_parser *);
866 static void c_parser_declaration_or_fndef (c_parser *, bool, bool, bool, bool);
867 static void c_parser_declspecs (c_parser *, struct c_declspecs *, bool, bool,
869 static struct c_typespec c_parser_enum_specifier (c_parser *);
870 static struct c_typespec c_parser_struct_or_union_specifier (c_parser *);
871 static tree c_parser_struct_declaration (c_parser *);
872 static struct c_typespec c_parser_typeof_specifier (c_parser *);
873 static struct c_declarator *c_parser_declarator (c_parser *, bool, c_dtr_syn,
875 static struct c_declarator *c_parser_direct_declarator (c_parser *, bool,
877 static struct c_declarator *c_parser_direct_declarator_inner (c_parser *,
879 struct c_declarator *);
880 static struct c_arg_info *c_parser_parms_declarator (c_parser *, bool, tree);
881 static struct c_arg_info *c_parser_parms_list_declarator (c_parser *, tree);
882 static struct c_parm *c_parser_parameter_declaration (c_parser *, tree);
883 static tree c_parser_simple_asm_expr (c_parser *);
884 static tree c_parser_attributes (c_parser *);
885 static struct c_type_name *c_parser_type_name (c_parser *);
886 static struct c_expr c_parser_initializer (c_parser *);
887 static struct c_expr c_parser_braced_init (c_parser *, tree, bool);
888 static void c_parser_initelt (c_parser *);
889 static void c_parser_initval (c_parser *, struct c_expr *);
890 static tree c_parser_compound_statement (c_parser *);
891 static void c_parser_compound_statement_nostart (c_parser *);
892 static void c_parser_label (c_parser *);
893 static void c_parser_statement (c_parser *);
894 static void c_parser_statement_after_labels (c_parser *);
895 static void c_parser_if_statement (c_parser *);
896 static void c_parser_switch_statement (c_parser *);
897 static void c_parser_while_statement (c_parser *);
898 static void c_parser_do_statement (c_parser *);
899 static void c_parser_for_statement (c_parser *);
900 static tree c_parser_asm_statement (c_parser *);
901 static tree c_parser_asm_operands (c_parser *, bool);
902 static tree c_parser_asm_clobbers (c_parser *);
903 static struct c_expr c_parser_expr_no_commas (c_parser *, struct c_expr *);
904 static struct c_expr c_parser_conditional_expression (c_parser *,
906 static struct c_expr c_parser_binary_expression (c_parser *, struct c_expr *);
907 static struct c_expr c_parser_cast_expression (c_parser *, struct c_expr *);
908 static struct c_expr c_parser_unary_expression (c_parser *);
909 static struct c_expr c_parser_sizeof_expression (c_parser *);
910 static struct c_expr c_parser_alignof_expression (c_parser *);
911 static struct c_expr c_parser_postfix_expression (c_parser *);
912 static struct c_expr c_parser_postfix_expression_after_paren_type (c_parser *,
913 struct c_type_name *);
914 static struct c_expr c_parser_postfix_expression_after_primary (c_parser *,
916 static struct c_expr c_parser_expression (c_parser *);
917 static struct c_expr c_parser_expression_conv (c_parser *);
918 static tree c_parser_expr_list (c_parser *, bool, 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);
1459 t.expr_const_operands = true;
1463 tree proto = NULL_TREE;
1464 gcc_assert (c_dialect_objc ());
1466 if (c_parser_next_token_is (parser, CPP_LESS))
1467 proto = c_parser_objc_protocol_refs (parser);
1468 t.spec = objc_get_protocol_qualified_type (value, proto);
1470 t.expr_const_operands = true;
1472 declspecs_add_type (specs, t);
1475 if (c_parser_next_token_is (parser, CPP_LESS))
1477 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
1478 nisse@lysator.liu.se. */
1480 gcc_assert (c_dialect_objc ());
1481 if (!typespec_ok || seen_type)
1483 proto = c_parser_objc_protocol_refs (parser);
1485 t.spec = objc_get_protocol_qualified_type (NULL_TREE, proto);
1487 t.expr_const_operands = true;
1488 declspecs_add_type (specs, t);
1491 gcc_assert (c_parser_next_token_is (parser, CPP_KEYWORD));
1492 switch (c_parser_peek_token (parser)->keyword)
1504 /* TODO: Distinguish between function specifiers (inline)
1505 and storage class specifiers, either here or in
1506 declspecs_add_scspec. */
1507 declspecs_add_scspec (specs, c_parser_peek_token (parser)->value);
1508 c_parser_consume_token (parser);
1531 if (c_dialect_objc ())
1532 parser->objc_need_raw_identifier = true;
1533 t.kind = ctsk_resword;
1534 t.spec = c_parser_peek_token (parser)->value;
1536 t.expr_const_operands = true;
1537 declspecs_add_type (specs, t);
1538 c_parser_consume_token (parser);
1545 t = c_parser_enum_specifier (parser);
1546 declspecs_add_type (specs, t);
1554 t = c_parser_struct_or_union_specifier (parser);
1555 declspecs_add_type (specs, t);
1558 /* ??? The old parser rejected typeof after other type
1559 specifiers, but is a syntax error the best way of
1561 if (!typespec_ok || seen_type)
1565 t = c_parser_typeof_specifier (parser);
1566 declspecs_add_type (specs, t);
1572 declspecs_add_qual (specs, c_parser_peek_token (parser)->value);
1573 c_parser_consume_token (parser);
1578 attrs = c_parser_attributes (parser);
1579 declspecs_add_attrs (specs, attrs);
1588 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
1591 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
1592 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
1593 enum attributes[opt] identifier
1595 The form with trailing comma is new in C99. The forms with
1596 attributes are GNU extensions. In GNU C, we accept any expression
1597 without commas in the syntax (assignment expressions, not just
1598 conditional expressions); assignment expressions will be diagnosed
1603 enumerator-list , enumerator
1606 enumeration-constant
1607 enumeration-constant = constant-expression
1610 static struct c_typespec
1611 c_parser_enum_specifier (c_parser *parser)
1613 struct c_typespec ret;
1615 tree ident = NULL_TREE;
1616 location_t ident_loc = UNKNOWN_LOCATION; /* Quiet warning. */
1617 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ENUM));
1618 c_parser_consume_token (parser);
1619 attrs = c_parser_attributes (parser);
1620 /* Set the location in case we create a decl now. */
1621 c_parser_set_source_position_from_token (c_parser_peek_token (parser));
1622 if (c_parser_next_token_is (parser, CPP_NAME))
1624 ident = c_parser_peek_token (parser)->value;
1625 ident_loc = c_parser_peek_token (parser)->location;
1626 c_parser_consume_token (parser);
1628 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
1630 /* Parse an enum definition. */
1631 struct c_enum_contents the_enum;
1632 tree type = start_enum (&the_enum, ident);
1634 /* We chain the enumerators in reverse order, then put them in
1635 forward order at the end. */
1636 tree values = NULL_TREE;
1637 c_parser_consume_token (parser);
1645 location_t comma_loc = UNKNOWN_LOCATION; /* Quiet warning. */
1646 location_t value_loc;
1647 if (c_parser_next_token_is_not (parser, CPP_NAME))
1649 c_parser_error (parser, "expected identifier");
1650 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
1651 values = error_mark_node;
1654 token = c_parser_peek_token (parser);
1655 enum_id = token->value;
1656 /* Set the location in case we create a decl now. */
1657 c_parser_set_source_position_from_token (token);
1658 value_loc = token->location;
1659 c_parser_consume_token (parser);
1660 if (c_parser_next_token_is (parser, CPP_EQ))
1662 c_parser_consume_token (parser);
1663 value_loc = c_parser_peek_token (parser)->location;
1664 enum_value = c_parser_expr_no_commas (parser, NULL).value;
1667 enum_value = NULL_TREE;
1668 enum_decl = build_enumerator (&the_enum, enum_id, enum_value,
1670 TREE_CHAIN (enum_decl) = values;
1673 if (c_parser_next_token_is (parser, CPP_COMMA))
1675 comma_loc = c_parser_peek_token (parser)->location;
1677 c_parser_consume_token (parser);
1679 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
1681 if (seen_comma && !flag_isoc99)
1682 pedwarn (comma_loc, OPT_pedantic, "comma at end of enumerator list");
1683 c_parser_consume_token (parser);
1688 c_parser_error (parser, "expected %<,%> or %<}%>");
1689 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
1690 values = error_mark_node;
1694 postfix_attrs = c_parser_attributes (parser);
1695 ret.spec = finish_enum (type, nreverse (values),
1696 chainon (attrs, postfix_attrs));
1697 ret.kind = ctsk_tagdef;
1698 ret.expr = NULL_TREE;
1699 ret.expr_const_operands = true;
1704 c_parser_error (parser, "expected %<{%>");
1705 ret.spec = error_mark_node;
1706 ret.kind = ctsk_tagref;
1707 ret.expr = NULL_TREE;
1708 ret.expr_const_operands = true;
1711 ret = parser_xref_tag (ENUMERAL_TYPE, ident);
1712 /* In ISO C, enumerated types can be referred to only if already
1714 if (pedantic && !COMPLETE_TYPE_P (ret.spec))
1717 pedwarn (ident_loc, OPT_pedantic,
1718 "ISO C forbids forward references to %<enum%> types");
1723 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
1725 struct-or-union-specifier:
1726 struct-or-union attributes[opt] identifier[opt]
1727 { struct-contents } attributes[opt]
1728 struct-or-union attributes[opt] identifier
1731 struct-declaration-list
1733 struct-declaration-list:
1734 struct-declaration ;
1735 struct-declaration-list struct-declaration ;
1742 struct-declaration-list struct-declaration
1744 struct-declaration-list:
1745 struct-declaration-list ;
1748 (Note that in the syntax here, unlike that in ISO C, the semicolons
1749 are included here rather than in struct-declaration, in order to
1750 describe the syntax with extra semicolons and missing semicolon at
1755 struct-declaration-list:
1756 @defs ( class-name )
1758 (Note this does not include a trailing semicolon, but can be
1759 followed by further declarations, and gets a pedwarn-if-pedantic
1760 when followed by a semicolon.) */
1762 static struct c_typespec
1763 c_parser_struct_or_union_specifier (c_parser *parser)
1765 struct c_typespec ret;
1767 tree ident = NULL_TREE;
1768 enum tree_code code;
1769 switch (c_parser_peek_token (parser)->keyword)
1780 c_parser_consume_token (parser);
1781 attrs = c_parser_attributes (parser);
1782 /* Set the location in case we create a decl now. */
1783 c_parser_set_source_position_from_token (c_parser_peek_token (parser));
1784 if (c_parser_next_token_is (parser, CPP_NAME))
1786 ident = c_parser_peek_token (parser)->value;
1787 c_parser_consume_token (parser);
1789 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
1791 /* Parse a struct or union definition. Start the scope of the
1792 tag before parsing components. */
1793 tree type = start_struct (code, ident);
1795 /* We chain the components in reverse order, then put them in
1796 forward order at the end. Each struct-declaration may
1797 declare multiple components (comma-separated), so we must use
1798 chainon to join them, although when parsing each
1799 struct-declaration we can use TREE_CHAIN directly.
1801 The theory behind all this is that there will be more
1802 semicolon separated fields than comma separated fields, and
1803 so we'll be minimizing the number of node traversals required
1805 tree contents = NULL_TREE;
1806 c_parser_consume_token (parser);
1807 /* Handle the Objective-C @defs construct,
1808 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
1809 if (c_parser_next_token_is_keyword (parser, RID_AT_DEFS))
1812 gcc_assert (c_dialect_objc ());
1813 c_parser_consume_token (parser);
1814 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
1816 if (c_parser_next_token_is (parser, CPP_NAME)
1817 && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)
1819 name = c_parser_peek_token (parser)->value;
1820 c_parser_consume_token (parser);
1824 c_parser_error (parser, "expected class name");
1825 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
1828 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
1830 contents = nreverse (objc_get_class_ivars (name));
1833 /* Parse the struct-declarations and semicolons. Problems with
1834 semicolons are diagnosed here; empty structures are diagnosed
1839 /* Parse any stray semicolon. */
1840 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1842 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
1843 "extra semicolon in struct or union specified");
1844 c_parser_consume_token (parser);
1847 /* Stop if at the end of the struct or union contents. */
1848 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
1850 c_parser_consume_token (parser);
1853 /* Accept #pragmas at struct scope. */
1854 if (c_parser_next_token_is (parser, CPP_PRAGMA))
1856 c_parser_pragma (parser, pragma_external);
1859 /* Parse some comma-separated declarations, but not the
1860 trailing semicolon if any. */
1861 decls = c_parser_struct_declaration (parser);
1862 contents = chainon (decls, contents);
1863 /* If no semicolon follows, either we have a parse error or
1864 are at the end of the struct or union and should
1866 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1867 c_parser_consume_token (parser);
1870 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
1871 pedwarn (c_parser_peek_token (parser)->location, 0,
1872 "no semicolon at end of struct or union");
1875 c_parser_error (parser, "expected %<;%>");
1876 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
1881 postfix_attrs = c_parser_attributes (parser);
1882 ret.spec = finish_struct (type, nreverse (contents),
1883 chainon (attrs, postfix_attrs));
1884 ret.kind = ctsk_tagdef;
1885 ret.expr = NULL_TREE;
1886 ret.expr_const_operands = true;
1891 c_parser_error (parser, "expected %<{%>");
1892 ret.spec = error_mark_node;
1893 ret.kind = ctsk_tagref;
1894 ret.expr = NULL_TREE;
1895 ret.expr_const_operands = true;
1898 ret = parser_xref_tag (code, ident);
1902 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
1903 the trailing semicolon.
1906 specifier-qualifier-list struct-declarator-list
1908 specifier-qualifier-list:
1909 type-specifier specifier-qualifier-list[opt]
1910 type-qualifier specifier-qualifier-list[opt]
1911 attributes specifier-qualifier-list[opt]
1913 struct-declarator-list:
1915 struct-declarator-list , attributes[opt] struct-declarator
1918 declarator attributes[opt]
1919 declarator[opt] : constant-expression attributes[opt]
1924 __extension__ struct-declaration
1925 specifier-qualifier-list
1927 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
1928 of attributes where shown is a GNU extension. In GNU C, we accept
1929 any expression without commas in the syntax (assignment
1930 expressions, not just conditional expressions); assignment
1931 expressions will be diagnosed as non-constant. */
1934 c_parser_struct_declaration (c_parser *parser)
1936 struct c_declspecs *specs;
1938 tree all_prefix_attrs;
1940 location_t decl_loc;
1941 if (c_parser_next_token_is_keyword (parser, RID_EXTENSION))
1945 ext = disable_extension_diagnostics ();
1946 c_parser_consume_token (parser);
1947 decl = c_parser_struct_declaration (parser);
1948 restore_extension_diagnostics (ext);
1951 specs = build_null_declspecs ();
1952 decl_loc = c_parser_peek_token (parser)->location;
1953 c_parser_declspecs (parser, specs, false, true, true);
1956 if (!specs->declspecs_seen_p)
1958 c_parser_error (parser, "expected specifier-qualifier-list");
1961 finish_declspecs (specs);
1962 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1965 if (!specs->type_seen_p)
1967 pedwarn (decl_loc, OPT_pedantic,
1968 "ISO C forbids member declarations with no members");
1969 shadow_tag_warned (specs, pedantic);
1974 /* Support for unnamed structs or unions as members of
1975 structs or unions (which is [a] useful and [b] supports
1979 ret = grokfield (c_parser_peek_token (parser)->location,
1980 build_id_declarator (NULL_TREE), specs,
1983 decl_attributes (&ret, attrs, 0);
1987 pending_xref_error ();
1988 prefix_attrs = specs->attrs;
1989 all_prefix_attrs = prefix_attrs;
1990 specs->attrs = NULL_TREE;
1994 /* Declaring one or more declarators or un-named bit-fields. */
1995 struct c_declarator *declarator;
1997 if (c_parser_next_token_is (parser, CPP_COLON))
1998 declarator = build_id_declarator (NULL_TREE);
2000 declarator = c_parser_declarator (parser, specs->type_seen_p,
2001 C_DTR_NORMAL, &dummy);
2002 if (declarator == NULL)
2004 c_parser_skip_to_end_of_block_or_statement (parser);
2007 if (c_parser_next_token_is (parser, CPP_COLON)
2008 || c_parser_next_token_is (parser, CPP_COMMA)
2009 || c_parser_next_token_is (parser, CPP_SEMICOLON)
2010 || c_parser_next_token_is (parser, CPP_CLOSE_BRACE)
2011 || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2013 tree postfix_attrs = NULL_TREE;
2014 tree width = NULL_TREE;
2016 if (c_parser_next_token_is (parser, CPP_COLON))
2018 c_parser_consume_token (parser);
2019 width = c_parser_expr_no_commas (parser, NULL).value;
2021 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2022 postfix_attrs = c_parser_attributes (parser);
2023 d = grokfield (c_parser_peek_token (parser)->location,
2024 declarator, specs, width, &all_prefix_attrs);
2025 decl_attributes (&d, chainon (postfix_attrs,
2026 all_prefix_attrs), 0);
2027 TREE_CHAIN (d) = decls;
2029 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2030 all_prefix_attrs = chainon (c_parser_attributes (parser),
2033 all_prefix_attrs = prefix_attrs;
2034 if (c_parser_next_token_is (parser, CPP_COMMA))
2035 c_parser_consume_token (parser);
2036 else if (c_parser_next_token_is (parser, CPP_SEMICOLON)
2037 || c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
2039 /* Semicolon consumed in caller. */
2044 c_parser_error (parser, "expected %<,%>, %<;%> or %<}%>");
2050 c_parser_error (parser,
2051 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2052 "%<__attribute__%>");
2059 /* Parse a typeof specifier (a GNU extension).
2062 typeof ( expression )
2063 typeof ( type-name )
2066 static struct c_typespec
2067 c_parser_typeof_specifier (c_parser *parser)
2069 struct c_typespec ret;
2070 ret.kind = ctsk_typeof;
2071 ret.spec = error_mark_node;
2072 ret.expr = NULL_TREE;
2073 ret.expr_const_operands = true;
2074 gcc_assert (c_parser_next_token_is_keyword (parser, RID_TYPEOF));
2075 c_parser_consume_token (parser);
2078 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2084 if (c_parser_next_token_starts_typename (parser))
2086 struct c_type_name *type = c_parser_type_name (parser);
2091 ret.spec = groktypename (type, &ret.expr, &ret.expr_const_operands);
2092 pop_maybe_used (variably_modified_type_p (ret.spec, NULL_TREE));
2098 location_t here = c_parser_peek_token (parser)->location;
2099 struct c_expr expr = c_parser_expression (parser);
2102 if (TREE_CODE (expr.value) == COMPONENT_REF
2103 && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1)))
2104 error_at (here, "%<typeof%> applied to a bit-field");
2105 ret.spec = TREE_TYPE (expr.value);
2106 was_vm = variably_modified_type_p (ret.spec, NULL_TREE);
2107 /* This is returned with the type so that when the type is
2108 evaluated, this can be evaluated. */
2110 ret.expr = c_fully_fold (expr.value, false, &ret.expr_const_operands);
2111 pop_maybe_used (was_vm);
2113 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
2117 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2118 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2119 be redeclared; otherwise it may not. KIND indicates which kind of
2120 declarator is wanted. Returns a valid declarator except in the
2121 case of a syntax error in which case NULL is returned. *SEEN_ID is
2122 set to true if an identifier being declared is seen; this is used
2123 to diagnose bad forms of abstract array declarators and to
2124 determine whether an identifier list is syntactically permitted.
2127 pointer[opt] direct-declarator
2131 ( attributes[opt] declarator )
2132 direct-declarator array-declarator
2133 direct-declarator ( parameter-type-list )
2134 direct-declarator ( identifier-list[opt] )
2137 * type-qualifier-list[opt]
2138 * type-qualifier-list[opt] pointer
2140 type-qualifier-list:
2143 type-qualifier-list type-qualifier
2144 type-qualifier-list attributes
2146 parameter-type-list:
2148 parameter-list , ...
2151 parameter-declaration
2152 parameter-list , parameter-declaration
2154 parameter-declaration:
2155 declaration-specifiers declarator attributes[opt]
2156 declaration-specifiers abstract-declarator[opt] attributes[opt]
2160 identifier-list , identifier
2162 abstract-declarator:
2164 pointer[opt] direct-abstract-declarator
2166 direct-abstract-declarator:
2167 ( attributes[opt] abstract-declarator )
2168 direct-abstract-declarator[opt] array-declarator
2169 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2174 direct-declarator ( parameter-forward-declarations
2175 parameter-type-list[opt] )
2177 direct-abstract-declarator:
2178 direct-abstract-declarator[opt] ( parameter-forward-declarations
2179 parameter-type-list[opt] )
2181 parameter-forward-declarations:
2183 parameter-forward-declarations parameter-list ;
2185 The uses of attributes shown above are GNU extensions.
2187 Some forms of array declarator are not included in C99 in the
2188 syntax for abstract declarators; these are disallowed elsewhere.
2189 This may be a defect (DR#289).
2191 This function also accepts an omitted abstract declarator as being
2192 an abstract declarator, although not part of the formal syntax. */
2194 static struct c_declarator *
2195 c_parser_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind,
2198 /* Parse any initial pointer part. */
2199 if (c_parser_next_token_is (parser, CPP_MULT))
2201 struct c_declspecs *quals_attrs = build_null_declspecs ();
2202 struct c_declarator *inner;
2203 c_parser_consume_token (parser);
2204 c_parser_declspecs (parser, quals_attrs, false, false, true);
2205 inner = c_parser_declarator (parser, type_seen_p, kind, seen_id);
2209 return make_pointer_declarator (quals_attrs, inner);
2211 /* Now we have a direct declarator, direct abstract declarator or
2212 nothing (which counts as a direct abstract declarator here). */
2213 return c_parser_direct_declarator (parser, type_seen_p, kind, seen_id);
2216 /* Parse a direct declarator or direct abstract declarator; arguments
2217 as c_parser_declarator. */
2219 static struct c_declarator *
2220 c_parser_direct_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind,
2223 /* The direct declarator must start with an identifier (possibly
2224 omitted) or a parenthesized declarator (possibly abstract). In
2225 an ordinary declarator, initial parentheses must start a
2226 parenthesized declarator. In an abstract declarator or parameter
2227 declarator, they could start a parenthesized declarator or a
2228 parameter list. To tell which, the open parenthesis and any
2229 following attributes must be read. If a declaration specifier
2230 follows, then it is a parameter list; if the specifier is a
2231 typedef name, there might be an ambiguity about redeclaring it,
2232 which is resolved in the direction of treating it as a typedef
2233 name. If a close parenthesis follows, it is also an empty
2234 parameter list, as the syntax does not permit empty abstract
2235 declarators. Otherwise, it is a parenthesized declarator (in
2236 which case the analysis may be repeated inside it, recursively).
2238 ??? There is an ambiguity in a parameter declaration "int
2239 (__attribute__((foo)) x)", where x is not a typedef name: it
2240 could be an abstract declarator for a function, or declare x with
2241 parentheses. The proper resolution of this ambiguity needs
2242 documenting. At present we follow an accident of the old
2243 parser's implementation, whereby the first parameter must have
2244 some declaration specifiers other than just attributes. Thus as
2245 a parameter declaration it is treated as a parenthesized
2246 parameter named x, and as an abstract declarator it is
2249 ??? Also following the old parser, attributes inside an empty
2250 parameter list are ignored, making it a list not yielding a
2251 prototype, rather than giving an error or making it have one
2252 parameter with implicit type int.
2254 ??? Also following the old parser, typedef names may be
2255 redeclared in declarators, but not Objective-C class names. */
2257 if (kind != C_DTR_ABSTRACT
2258 && c_parser_next_token_is (parser, CPP_NAME)
2260 && c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME)
2261 || c_parser_peek_token (parser)->id_kind == C_ID_ID))
2263 struct c_declarator *inner
2264 = build_id_declarator (c_parser_peek_token (parser)->value);
2266 inner->id_loc = c_parser_peek_token (parser)->location;
2267 c_parser_consume_token (parser);
2268 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2271 if (kind != C_DTR_NORMAL
2272 && c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
2274 struct c_declarator *inner = build_id_declarator (NULL_TREE);
2275 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2278 /* Either we are at the end of an abstract declarator, or we have
2281 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
2284 struct c_declarator *inner;
2285 c_parser_consume_token (parser);
2286 attrs = c_parser_attributes (parser);
2287 if (kind != C_DTR_NORMAL
2288 && (c_parser_next_token_starts_declspecs (parser)
2289 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN)))
2291 struct c_arg_info *args
2292 = c_parser_parms_declarator (parser, kind == C_DTR_NORMAL,
2299 = build_function_declarator (args,
2300 build_id_declarator (NULL_TREE));
2301 return c_parser_direct_declarator_inner (parser, *seen_id,
2305 /* A parenthesized declarator. */
2306 inner = c_parser_declarator (parser, type_seen_p, kind, seen_id);
2307 if (inner != NULL && attrs != NULL)
2308 inner = build_attrs_declarator (attrs, inner);
2309 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2311 c_parser_consume_token (parser);
2315 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2319 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2326 if (kind == C_DTR_NORMAL)
2328 c_parser_error (parser, "expected identifier or %<(%>");
2332 return build_id_declarator (NULL_TREE);
2336 /* Parse part of a direct declarator or direct abstract declarator,
2337 given that some (in INNER) has already been parsed; ID_PRESENT is
2338 true if an identifier is present, false for an abstract
2341 static struct c_declarator *
2342 c_parser_direct_declarator_inner (c_parser *parser, bool id_present,
2343 struct c_declarator *inner)
2345 /* Parse a sequence of array declarators and parameter lists. */
2346 if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
2348 struct c_declarator *declarator;
2349 struct c_declspecs *quals_attrs = build_null_declspecs ();
2353 c_parser_consume_token (parser);
2354 c_parser_declspecs (parser, quals_attrs, false, false, true);
2355 static_seen = c_parser_next_token_is_keyword (parser, RID_STATIC);
2357 c_parser_consume_token (parser);
2358 if (static_seen && !quals_attrs->declspecs_seen_p)
2359 c_parser_declspecs (parser, quals_attrs, false, false, true);
2360 if (!quals_attrs->declspecs_seen_p)
2362 /* If "static" is present, there must be an array dimension.
2363 Otherwise, there may be a dimension, "*", or no
2368 dimen = c_parser_expr_no_commas (parser, NULL).value;
2372 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
2377 else if (c_parser_next_token_is (parser, CPP_MULT))
2379 if (c_parser_peek_2nd_token (parser)->type == CPP_CLOSE_SQUARE)
2383 c_parser_consume_token (parser);
2388 dimen = c_parser_expr_no_commas (parser, NULL).value;
2394 dimen = c_parser_expr_no_commas (parser, NULL).value;
2397 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
2398 c_parser_consume_token (parser);
2401 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
2405 declarator = build_array_declarator (dimen, quals_attrs, static_seen,
2407 if (declarator == NULL)
2409 inner = set_array_declarator_inner (declarator, inner);
2410 return c_parser_direct_declarator_inner (parser, id_present, inner);
2412 else if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
2415 struct c_arg_info *args;
2416 c_parser_consume_token (parser);
2417 attrs = c_parser_attributes (parser);
2418 args = c_parser_parms_declarator (parser, id_present, attrs);
2423 inner = build_function_declarator (args, inner);
2424 return c_parser_direct_declarator_inner (parser, id_present, inner);
2430 /* Parse a parameter list or identifier list, including the closing
2431 parenthesis but not the opening one. ATTRS are the attributes at
2432 the start of the list. ID_LIST_OK is true if an identifier list is
2433 acceptable; such a list must not have attributes at the start. */
2435 static struct c_arg_info *
2436 c_parser_parms_declarator (c_parser *parser, bool id_list_ok, tree attrs)
2439 declare_parm_level ();
2440 /* If the list starts with an identifier, it is an identifier list.
2441 Otherwise, it is either a prototype list or an empty list. */
2444 && c_parser_next_token_is (parser, CPP_NAME)
2445 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
2447 tree list = NULL_TREE, *nextp = &list;
2448 while (c_parser_next_token_is (parser, CPP_NAME)
2449 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
2451 *nextp = build_tree_list (NULL_TREE,
2452 c_parser_peek_token (parser)->value);
2453 nextp = & TREE_CHAIN (*nextp);
2454 c_parser_consume_token (parser);
2455 if (c_parser_next_token_is_not (parser, CPP_COMMA))
2457 c_parser_consume_token (parser);
2458 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2460 c_parser_error (parser, "expected identifier");
2464 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2466 struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
2471 ret->pending_sizes = 0;
2472 ret->had_vla_unspec = 0;
2473 c_parser_consume_token (parser);
2479 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2487 struct c_arg_info *ret = c_parser_parms_list_declarator (parser, attrs);
2493 /* Parse a parameter list (possibly empty), including the closing
2494 parenthesis but not the opening one. ATTRS are the attributes at
2495 the start of the list. */
2497 static struct c_arg_info *
2498 c_parser_parms_list_declarator (c_parser *parser, tree attrs)
2500 bool good_parm = false;
2501 /* ??? Following the old parser, forward parameter declarations may
2502 use abstract declarators, and if no real parameter declarations
2503 follow the forward declarations then this is not diagnosed. Also
2504 note as above that attributes are ignored as the only contents of
2505 the parentheses, or as the only contents after forward
2507 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2509 struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
2514 ret->pending_sizes = 0;
2515 ret->had_vla_unspec = 0;
2516 c_parser_consume_token (parser);
2519 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
2521 struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
2525 ret->pending_sizes = 0;
2526 ret->had_vla_unspec = 0;
2527 /* Suppress -Wold-style-definition for this case. */
2528 ret->types = error_mark_node;
2529 error_at (c_parser_peek_token (parser)->location,
2530 "ISO C requires a named argument before %<...%>");
2531 c_parser_consume_token (parser);
2532 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2534 c_parser_consume_token (parser);
2539 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2544 /* Nonempty list of parameters, either terminated with semicolon
2545 (forward declarations; recurse) or with close parenthesis (normal
2546 function) or with ", ... )" (variadic function). */
2549 /* Parse a parameter. */
2550 struct c_parm *parm = c_parser_parameter_declaration (parser, attrs);
2555 push_parm_decl (parm);
2557 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
2560 c_parser_consume_token (parser);
2561 mark_forward_parm_decls ();
2562 new_attrs = c_parser_attributes (parser);
2563 return c_parser_parms_list_declarator (parser, new_attrs);
2565 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2567 c_parser_consume_token (parser);
2569 return get_parm_info (false);
2572 struct c_arg_info *ret
2573 = XOBNEW (&parser_obstack, struct c_arg_info);
2578 ret->pending_sizes = 0;
2579 ret->had_vla_unspec = 0;
2583 if (!c_parser_require (parser, CPP_COMMA,
2584 "expected %<;%>, %<,%> or %<)%>"))
2586 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
2587 get_pending_sizes ();
2590 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
2592 c_parser_consume_token (parser);
2593 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2595 c_parser_consume_token (parser);
2597 return get_parm_info (true);
2600 struct c_arg_info *ret
2601 = XOBNEW (&parser_obstack, struct c_arg_info);
2606 ret->pending_sizes = 0;
2607 ret->had_vla_unspec = 0;
2613 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2615 get_pending_sizes ();
2622 /* Parse a parameter declaration. ATTRS are the attributes at the
2623 start of the declaration if it is the first parameter. */
2625 static struct c_parm *
2626 c_parser_parameter_declaration (c_parser *parser, tree attrs)
2628 struct c_declspecs *specs;
2629 struct c_declarator *declarator;
2631 tree postfix_attrs = NULL_TREE;
2633 if (!c_parser_next_token_starts_declspecs (parser))
2635 /* ??? In some Objective-C cases '...' isn't applicable so there
2636 should be a different message. */
2637 c_parser_error (parser,
2638 "expected declaration specifiers or %<...%>");
2639 c_parser_skip_to_end_of_parameter (parser);
2642 specs = build_null_declspecs ();
2645 declspecs_add_attrs (specs, attrs);
2648 c_parser_declspecs (parser, specs, true, true, true);
2649 finish_declspecs (specs);
2650 pending_xref_error ();
2651 prefix_attrs = specs->attrs;
2652 specs->attrs = NULL_TREE;
2653 declarator = c_parser_declarator (parser, specs->type_seen_p,
2654 C_DTR_PARM, &dummy);
2655 if (declarator == NULL)
2657 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
2660 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2661 postfix_attrs = c_parser_attributes (parser);
2662 return build_c_parm (specs, chainon (postfix_attrs, prefix_attrs),
2666 /* Parse a string literal in an asm expression. It should not be
2667 translated, and wide string literals are an error although
2668 permitted by the syntax. This is a GNU extension.
2673 ??? At present, following the old parser, the caller needs to have
2674 set lex_untranslated_string to 1. It would be better to follow the
2675 C++ parser rather than using this kludge. */
2678 c_parser_asm_string_literal (c_parser *parser)
2681 if (c_parser_next_token_is (parser, CPP_STRING))
2683 str = c_parser_peek_token (parser)->value;
2684 c_parser_consume_token (parser);
2686 else if (c_parser_next_token_is (parser, CPP_WSTRING))
2688 error_at (c_parser_peek_token (parser)->location,
2689 "wide string literal in %<asm%>");
2690 str = build_string (1, "");
2691 c_parser_consume_token (parser);
2695 c_parser_error (parser, "expected string literal");
2701 /* Parse a simple asm expression. This is used in restricted
2702 contexts, where a full expression with inputs and outputs does not
2703 make sense. This is a GNU extension.
2706 asm ( asm-string-literal )
2710 c_parser_simple_asm_expr (c_parser *parser)
2713 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM));
2714 /* ??? Follow the C++ parser rather than using the
2715 lex_untranslated_string kludge. */
2716 parser->lex_untranslated_string = true;
2717 c_parser_consume_token (parser);
2718 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2720 parser->lex_untranslated_string = false;
2723 str = c_parser_asm_string_literal (parser);
2724 parser->lex_untranslated_string = false;
2725 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
2727 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
2733 /* Parse (possibly empty) attributes. This is a GNU extension.
2737 attributes attribute
2740 __attribute__ ( ( attribute-list ) )
2744 attribute_list , attrib
2749 any-word ( identifier )
2750 any-word ( identifier , nonempty-expr-list )
2751 any-word ( expr-list )
2753 where the "identifier" must not be declared as a type, and
2754 "any-word" may be any identifier (including one declared as a
2755 type), a reserved word storage class specifier, type specifier or
2756 type qualifier. ??? This still leaves out most reserved keywords
2757 (following the old parser), shouldn't we include them, and why not
2758 allow identifiers declared as types to start the arguments? */
2761 c_parser_attributes (c_parser *parser)
2763 tree attrs = NULL_TREE;
2764 while (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2766 /* ??? Follow the C++ parser rather than using the
2767 lex_untranslated_string kludge. */
2768 parser->lex_untranslated_string = true;
2769 c_parser_consume_token (parser);
2770 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2772 parser->lex_untranslated_string = false;
2775 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2777 parser->lex_untranslated_string = false;
2778 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
2781 /* Parse the attribute list. */
2782 while (c_parser_next_token_is (parser, CPP_COMMA)
2783 || c_parser_next_token_is (parser, CPP_NAME)
2784 || c_parser_next_token_is (parser, CPP_KEYWORD))
2786 tree attr, attr_name, attr_args;
2787 if (c_parser_next_token_is (parser, CPP_COMMA))
2789 c_parser_consume_token (parser);
2792 if (c_parser_next_token_is (parser, CPP_KEYWORD))
2794 /* ??? See comment above about what keywords are
2797 switch (c_parser_peek_token (parser)->keyword)
2834 /* Accept __attribute__((__const)) as __attribute__((const))
2837 = ridpointers[(int) c_parser_peek_token (parser)->keyword];
2840 attr_name = c_parser_peek_token (parser)->value;
2841 c_parser_consume_token (parser);
2842 if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN))
2844 attr = build_tree_list (attr_name, NULL_TREE);
2845 attrs = chainon (attrs, attr);
2848 c_parser_consume_token (parser);
2849 /* Parse the attribute contents. If they start with an
2850 identifier which is followed by a comma or close
2851 parenthesis, then the arguments start with that
2852 identifier; otherwise they are an expression list. */
2853 if (c_parser_next_token_is (parser, CPP_NAME)
2854 && c_parser_peek_token (parser)->id_kind == C_ID_ID
2855 && ((c_parser_peek_2nd_token (parser)->type == CPP_COMMA)
2856 || (c_parser_peek_2nd_token (parser)->type
2857 == CPP_CLOSE_PAREN)))
2859 tree arg1 = c_parser_peek_token (parser)->value;
2860 c_parser_consume_token (parser);
2861 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2862 attr_args = build_tree_list (NULL_TREE, arg1);
2865 c_parser_consume_token (parser);
2866 attr_args = tree_cons (NULL_TREE, arg1,
2867 c_parser_expr_list (parser, false,
2873 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2874 attr_args = NULL_TREE;
2876 attr_args = c_parser_expr_list (parser, false, true);
2878 attr = build_tree_list (attr_name, attr_args);
2879 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2880 c_parser_consume_token (parser);
2883 parser->lex_untranslated_string = false;
2884 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2888 attrs = chainon (attrs, attr);
2890 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2891 c_parser_consume_token (parser);
2894 parser->lex_untranslated_string = false;
2895 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2899 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2900 c_parser_consume_token (parser);
2903 parser->lex_untranslated_string = false;
2904 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2908 parser->lex_untranslated_string = false;
2913 /* Parse a type name (C90 6.5.5, C99 6.7.6).
2916 specifier-qualifier-list abstract-declarator[opt]
2919 static struct c_type_name *
2920 c_parser_type_name (c_parser *parser)
2922 struct c_declspecs *specs = build_null_declspecs ();
2923 struct c_declarator *declarator;
2924 struct c_type_name *ret;
2926 c_parser_declspecs (parser, specs, false, true, true);
2927 if (!specs->declspecs_seen_p)
2929 c_parser_error (parser, "expected specifier-qualifier-list");
2932 pending_xref_error ();
2933 finish_declspecs (specs);
2934 declarator = c_parser_declarator (parser, specs->type_seen_p,
2935 C_DTR_ABSTRACT, &dummy);
2936 if (declarator == NULL)
2938 ret = XOBNEW (&parser_obstack, struct c_type_name);
2940 ret->declarator = declarator;
2944 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
2947 assignment-expression
2948 { initializer-list }
2949 { initializer-list , }
2952 designation[opt] initializer
2953 initializer-list , designation[opt] initializer
2960 designator-list designator
2967 [ constant-expression ]
2979 [ constant-expression ... constant-expression ]
2981 Any expression without commas is accepted in the syntax for the
2982 constant-expressions, with non-constant expressions rejected later.
2984 This function is only used for top-level initializers; for nested
2985 ones, see c_parser_initval. */
2987 static struct c_expr
2988 c_parser_initializer (c_parser *parser)
2990 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
2991 return c_parser_braced_init (parser, NULL_TREE, false);
2995 ret = c_parser_expr_no_commas (parser, NULL);
2996 if (TREE_CODE (ret.value) != STRING_CST
2997 && TREE_CODE (ret.value) != COMPOUND_LITERAL_EXPR)
2998 ret = default_function_array_conversion (ret);
3003 /* Parse a braced initializer list. TYPE is the type specified for a
3004 compound literal, and NULL_TREE for other initializers and for
3005 nested braced lists. NESTED_P is true for nested braced lists,
3006 false for the list of a compound literal or the list that is the
3007 top-level initializer in a declaration. */
3009 static struct c_expr
3010 c_parser_braced_init (c_parser *parser, tree type, bool nested_p)
3012 location_t brace_loc = c_parser_peek_token (parser)->location;
3013 gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE));
3014 c_parser_consume_token (parser);
3016 push_init_level (0);
3018 really_start_incremental_init (type);
3019 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3021 pedwarn (brace_loc, OPT_pedantic, "ISO C forbids empty initializer braces");
3025 /* Parse a non-empty initializer list, possibly with a trailing
3029 c_parser_initelt (parser);
3032 if (c_parser_next_token_is (parser, CPP_COMMA))
3033 c_parser_consume_token (parser);
3036 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3040 if (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE))
3043 ret.value = error_mark_node;
3044 ret.original_code = ERROR_MARK;
3045 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, "expected %<}%>");
3049 c_parser_consume_token (parser);
3050 return pop_init_level (0);
3053 /* Parse a nested initializer, including designators. */
3056 c_parser_initelt (c_parser *parser)
3058 /* Parse any designator or designator list. A single array
3059 designator may have the subsequent "=" omitted in GNU C, but a
3060 longer list or a structure member designator may not. */
3061 if (c_parser_next_token_is (parser, CPP_NAME)
3062 && c_parser_peek_2nd_token (parser)->type == CPP_COLON)
3064 /* Old-style structure member designator. */
3065 set_init_label (c_parser_peek_token (parser)->value);
3066 /* Use the colon as the error location. */
3067 pedwarn (c_parser_peek_2nd_token (parser)->location, OPT_pedantic,
3068 "obsolete use of designated initializer with %<:%>");
3069 c_parser_consume_token (parser);
3070 c_parser_consume_token (parser);
3074 /* des_seen is 0 if there have been no designators, 1 if there
3075 has been a single array designator and 2 otherwise. */
3077 /* Location of a designator. */
3078 location_t des_loc = UNKNOWN_LOCATION; /* Quiet warning. */
3079 while (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)
3080 || c_parser_next_token_is (parser, CPP_DOT))
3082 int des_prev = des_seen;
3084 des_loc = c_parser_peek_token (parser)->location;
3087 if (c_parser_next_token_is (parser, CPP_DOT))
3090 c_parser_consume_token (parser);
3091 if (c_parser_next_token_is (parser, CPP_NAME))
3093 set_init_label (c_parser_peek_token (parser)->value);
3094 c_parser_consume_token (parser);
3099 init.value = error_mark_node;
3100 init.original_code = ERROR_MARK;
3101 c_parser_error (parser, "expected identifier");
3102 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
3103 process_init_element (init, false);
3110 location_t ellipsis_loc = UNKNOWN_LOCATION; /* Quiet warning. */
3111 /* ??? Following the old parser, [ objc-receiver
3112 objc-message-args ] is accepted as an initializer,
3113 being distinguished from a designator by what follows
3114 the first assignment expression inside the square
3115 brackets, but after a first array designator a
3116 subsequent square bracket is for Objective-C taken to
3117 start an expression, using the obsolete form of
3118 designated initializer without '=', rather than
3119 possibly being a second level of designation: in LALR
3120 terms, the '[' is shifted rather than reducing
3121 designator to designator-list. */
3122 if (des_prev == 1 && c_dialect_objc ())
3124 des_seen = des_prev;
3127 if (des_prev == 0 && c_dialect_objc ())
3129 /* This might be an array designator or an
3130 Objective-C message expression. If the former,
3131 continue parsing here; if the latter, parse the
3132 remainder of the initializer given the starting
3133 primary-expression. ??? It might make sense to
3134 distinguish when des_prev == 1 as well; see
3135 previous comment. */
3137 struct c_expr mexpr;
3138 c_parser_consume_token (parser);
3139 if (c_parser_peek_token (parser)->type == CPP_NAME
3140 && ((c_parser_peek_token (parser)->id_kind
3142 || (c_parser_peek_token (parser)->id_kind
3143 == C_ID_CLASSNAME)))
3145 /* Type name receiver. */
3146 tree id = c_parser_peek_token (parser)->value;
3147 c_parser_consume_token (parser);
3148 rec = objc_get_class_reference (id);
3149 goto parse_message_args;
3151 first = c_parser_expr_no_commas (parser, NULL).value;
3152 if (c_parser_next_token_is (parser, CPP_ELLIPSIS)
3153 || c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
3154 goto array_desig_after_first;
3155 /* Expression receiver. So far only one part
3156 without commas has been parsed; there might be
3157 more of the expression. */
3159 while (c_parser_next_token_is (parser, CPP_COMMA))
3162 c_parser_consume_token (parser);
3163 next = c_parser_expr_no_commas (parser, NULL);
3164 next = default_function_array_conversion (next);
3165 rec = build_compound_expr (rec, next.value);
3168 /* Now parse the objc-message-args. */
3169 args = c_parser_objc_message_args (parser);
3170 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
3173 = objc_build_message_expr (build_tree_list (rec, args));
3174 mexpr.original_code = ERROR_MARK;
3175 /* Now parse and process the remainder of the
3176 initializer, starting with this message
3177 expression as a primary-expression. */
3178 c_parser_initval (parser, &mexpr);
3181 c_parser_consume_token (parser);
3182 first = c_parser_expr_no_commas (parser, NULL).value;
3183 array_desig_after_first:
3184 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
3186 ellipsis_loc = c_parser_peek_token (parser)->location;
3187 c_parser_consume_token (parser);
3188 second = c_parser_expr_no_commas (parser, NULL).value;
3192 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
3194 c_parser_consume_token (parser);
3195 set_init_index (first, second);
3197 pedwarn (ellipsis_loc, OPT_pedantic,
3198 "ISO C forbids specifying range of elements to initialize");
3201 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
3207 if (c_parser_next_token_is (parser, CPP_EQ))
3210 pedwarn (des_loc, OPT_pedantic,
3211 "ISO C90 forbids specifying subobject to initialize");
3212 c_parser_consume_token (parser);
3217 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
3218 "obsolete use of designated initializer without %<=%>");
3222 init.value = error_mark_node;
3223 init.original_code = ERROR_MARK;
3224 c_parser_error (parser, "expected %<=%>");
3225 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
3226 process_init_element (init, false);
3232 c_parser_initval (parser, NULL);
3235 /* Parse a nested initializer; as c_parser_initializer but parses
3236 initializers within braced lists, after any designators have been
3237 applied. If AFTER is not NULL then it is an Objective-C message
3238 expression which is the primary-expression starting the
3242 c_parser_initval (c_parser *parser, struct c_expr *after)
3245 gcc_assert (!after || c_dialect_objc ());
3246 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE) && !after)
3247 init = c_parser_braced_init (parser, NULL_TREE, true);
3250 init = c_parser_expr_no_commas (parser, after);
3251 if (init.value != NULL_TREE
3252 && TREE_CODE (init.value) != STRING_CST
3253 && TREE_CODE (init.value) != COMPOUND_LITERAL_EXPR)
3254 init = default_function_array_conversion (init);
3256 process_init_element (init, false);
3259 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3263 { block-item-list[opt] }
3264 { label-declarations block-item-list }
3268 block-item-list block-item
3280 { label-declarations block-item-list }
3283 __extension__ nested-declaration
3284 nested-function-definition
3288 label-declarations label-declaration
3291 __label__ identifier-list ;
3293 Allowing the mixing of declarations and code is new in C99. The
3294 GNU syntax also permits (not shown above) labels at the end of
3295 compound statements, which yield an error. We don't allow labels
3296 on declarations; this might seem like a natural extension, but
3297 there would be a conflict between attributes on the label and
3298 prefix attributes on the declaration. ??? The syntax follows the
3299 old parser in requiring something after label declarations.
3300 Although they are erroneous if the labels declared aren't defined,
3301 is it useful for the syntax to be this way?
3313 c_parser_compound_statement (c_parser *parser)
3316 if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
3318 /* Ensure a scope is entered and left anyway to avoid confusion
3319 if we have just prepared to enter a function body. */
3320 stmt = c_begin_compound_stmt (true);
3321 c_end_compound_stmt (stmt, true);
3322 return error_mark_node;
3324 stmt = c_begin_compound_stmt (true);
3325 c_parser_compound_statement_nostart (parser);
3326 return c_end_compound_stmt (stmt, true);
3329 /* Parse a compound statement except for the opening brace. This is
3330 used for parsing both compound statements and statement expressions
3331 (which follow different paths to handling the opening). */
3334 c_parser_compound_statement_nostart (c_parser *parser)
3336 bool last_stmt = false;
3337 bool last_label = false;
3338 location_t label_loc = UNKNOWN_LOCATION; /* Quiet warning. */
3339 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3341 c_parser_consume_token (parser);
3344 if (c_parser_next_token_is_keyword (parser, RID_LABEL))
3346 location_t err_loc = c_parser_peek_token (parser)->location;
3347 /* Read zero or more forward-declarations for labels that nested
3348 functions can jump to. */
3349 while (c_parser_next_token_is_keyword (parser, RID_LABEL))
3351 c_parser_consume_token (parser);
3352 /* Any identifiers, including those declared as type names,
3357 if (c_parser_next_token_is_not (parser, CPP_NAME))
3359 c_parser_error (parser, "expected identifier");
3363 = declare_label (c_parser_peek_token (parser)->value);
3364 C_DECLARED_LABEL_FLAG (label) = 1;
3365 add_stmt (build_stmt (DECL_EXPR, label));
3366 c_parser_consume_token (parser);
3367 if (c_parser_next_token_is (parser, CPP_COMMA))
3368 c_parser_consume_token (parser);
3372 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
3374 pedwarn (err_loc, OPT_pedantic, "ISO C forbids label declarations");
3376 /* We must now have at least one statement, label or declaration. */
3377 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3379 c_parser_error (parser, "expected declaration or statement");
3380 c_parser_consume_token (parser);
3383 while (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE))
3385 location_t loc = c_parser_peek_token (parser)->location;
3386 if (c_parser_next_token_is_keyword (parser, RID_CASE)
3387 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3388 || (c_parser_next_token_is (parser, CPP_NAME)
3389 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3391 if (c_parser_next_token_is_keyword (parser, RID_CASE))
3392 label_loc = c_parser_peek_2nd_token (parser)->location;
3394 label_loc = c_parser_peek_token (parser)->location;
3397 c_parser_label (parser);
3399 else if (!last_label
3400 && c_parser_next_token_starts_declspecs (parser))
3403 c_parser_declaration_or_fndef (parser, true, true, true, true);
3406 (pedantic && !flag_isoc99)
3408 : OPT_Wdeclaration_after_statement,
3409 "ISO C90 forbids mixed declarations and code");
3412 else if (!last_label
3413 && c_parser_next_token_is_keyword (parser, RID_EXTENSION))
3415 /* __extension__ can start a declaration, but is also an
3416 unary operator that can start an expression. Consume all
3417 but the last of a possible series of __extension__ to
3419 while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD
3420 && (c_parser_peek_2nd_token (parser)->keyword
3422 c_parser_consume_token (parser);
3423 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser)))
3426 ext = disable_extension_diagnostics ();
3427 c_parser_consume_token (parser);
3429 c_parser_declaration_or_fndef (parser, true, true, true, true);
3430 /* Following the old parser, __extension__ does not
3431 disable this diagnostic. */
3432 restore_extension_diagnostics (ext);
3434 pedwarn_c90 (loc, (pedantic && !flag_isoc99)
3436 : OPT_Wdeclaration_after_statement,
3437 "ISO C90 forbids mixed declarations and code");
3443 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
3445 /* External pragmas, and some omp pragmas, are not associated
3446 with regular c code, and so are not to be considered statements
3447 syntactically. This ensures that the user doesn't put them
3448 places that would turn into syntax errors if the directive
3450 if (c_parser_pragma (parser, pragma_compound))
3451 last_label = false, last_stmt = true;
3453 else if (c_parser_next_token_is (parser, CPP_EOF))
3455 c_parser_error (parser, "expected declaration or statement");
3458 else if (c_parser_next_token_is_keyword (parser, RID_ELSE))
3460 if (parser->in_if_block)
3462 error_at (loc, """expected %<}%> before %<else%>");
3467 error_at (loc, "%<else%> without a previous %<if%>");
3468 c_parser_consume_token (parser);
3477 c_parser_statement_after_labels (parser);
3480 parser->error = false;
3483 error_at (label_loc, "label at end of compound statement");
3484 c_parser_consume_token (parser);
3487 /* Parse a label (C90 6.6.1, C99 6.8.1).
3490 identifier : attributes[opt]
3491 case constant-expression :
3497 case constant-expression ... constant-expression :
3499 The use of attributes on labels is a GNU extension. The syntax in
3500 GNU C accepts any expressions without commas, non-constant
3501 expressions being rejected later. */
3504 c_parser_label (c_parser *parser)
3506 location_t loc1 = c_parser_peek_token (parser)->location;
3507 tree label = NULL_TREE;
3508 if (c_parser_next_token_is_keyword (parser, RID_CASE))
3511 c_parser_consume_token (parser);
3512 exp1 = c_parser_expr_no_commas (parser, NULL).value;
3513 if (c_parser_next_token_is (parser, CPP_COLON))
3515 c_parser_consume_token (parser);
3516 label = do_case (exp1, NULL_TREE);
3518 else if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
3520 c_parser_consume_token (parser);
3521 exp2 = c_parser_expr_no_commas (parser, NULL).value;
3522 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
3523 label = do_case (exp1, exp2);
3526 c_parser_error (parser, "expected %<:%> or %<...%>");
3528 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
3530 c_parser_consume_token (parser);
3531 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
3532 label = do_case (NULL_TREE, NULL_TREE);
3536 tree name = c_parser_peek_token (parser)->value;
3539 location_t loc2 = c_parser_peek_token (parser)->location;
3540 gcc_assert (c_parser_next_token_is (parser, CPP_NAME));
3541 c_parser_consume_token (parser);
3542 gcc_assert (c_parser_next_token_is (parser, CPP_COLON));
3543 c_parser_consume_token (parser);
3544 attrs = c_parser_attributes (parser);
3545 tlab = define_label (loc2, name);
3548 decl_attributes (&tlab, attrs, 0);
3549 label = add_stmt (build_stmt (LABEL_EXPR, tlab));
3554 SET_EXPR_LOCATION (label, loc1);
3555 if (c_parser_next_token_starts_declspecs (parser)
3556 && !(c_parser_next_token_is (parser, CPP_NAME)
3557 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3559 error_at (c_parser_peek_token (parser)->location,
3560 "a label can only be part of a statement and "
3561 "a declaration is not a statement");
3562 c_parser_declaration_or_fndef (parser, /*fndef_ok*/ false,
3563 /*nested*/ true, /*empty_ok*/ false,
3564 /*start_attr_ok*/ true);
3569 /* Parse a statement (C90 6.6, C99 6.8).
3574 expression-statement
3582 expression-statement:
3585 selection-statement:
3589 iteration-statement:
3598 return expression[opt] ;
3611 objc-throw-statement
3612 objc-try-catch-statement
3613 objc-synchronized-statement
3615 objc-throw-statement:
3629 parallel-for-construct
3630 parallel-sections-construct
3637 parallel-directive structured-block
3640 for-directive iteration-statement
3643 sections-directive section-scope
3646 single-directive structured-block
3648 parallel-for-construct:
3649 parallel-for-directive iteration-statement
3651 parallel-sections-construct:
3652 parallel-sections-directive section-scope
3655 master-directive structured-block
3658 critical-directive structured-block
3661 atomic-directive expression-statement
3664 ordered-directive structured-block */
3667 c_parser_statement (c_parser *parser)
3669 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3670 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3671 || (c_parser_next_token_is (parser, CPP_NAME)
3672 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3673 c_parser_label (parser);
3674 c_parser_statement_after_labels (parser);
3677 /* Parse a statement, other than a labeled statement. */
3680 c_parser_statement_after_labels (c_parser *parser)
3682 location_t loc = c_parser_peek_token (parser)->location;
3683 tree stmt = NULL_TREE;
3684 bool in_if_block = parser->in_if_block;
3685 parser->in_if_block = false;
3686 switch (c_parser_peek_token (parser)->type)
3688 case CPP_OPEN_BRACE:
3689 add_stmt (c_parser_compound_statement (parser));
3692 switch (c_parser_peek_token (parser)->keyword)
3695 c_parser_if_statement (parser);
3698 c_parser_switch_statement (parser);
3701 c_parser_while_statement (parser);
3704 c_parser_do_statement (parser);
3707 c_parser_for_statement (parser);
3710 c_parser_consume_token (parser);
3711 if (c_parser_next_token_is (parser, CPP_NAME))
3713 stmt = c_finish_goto_label (c_parser_peek_token (parser)->value);
3714 c_parser_consume_token (parser);
3716 else if (c_parser_next_token_is (parser, CPP_MULT))
3718 c_parser_consume_token (parser);
3719 stmt = c_finish_goto_ptr (c_parser_expression (parser).value);
3722 c_parser_error (parser, "expected identifier or %<*%>");
3723 goto expect_semicolon;
3725 c_parser_consume_token (parser);
3726 stmt = c_finish_bc_stmt (&c_cont_label, false);
3727 goto expect_semicolon;
3729 c_parser_consume_token (parser);
3730 stmt = c_finish_bc_stmt (&c_break_label, true);
3731 goto expect_semicolon;
3733 c_parser_consume_token (parser);
3734 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3736 stmt = c_finish_return (NULL_TREE);
3737 c_parser_consume_token (parser);
3741 stmt = c_finish_return (c_parser_expression_conv (parser).value);
3742 goto expect_semicolon;
3746 stmt = c_parser_asm_statement (parser);
3749 gcc_assert (c_dialect_objc ());
3750 c_parser_consume_token (parser);
3751 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3753 stmt = objc_build_throw_stmt (NULL_TREE);
3754 c_parser_consume_token (parser);
3758 tree expr = c_parser_expression (parser).value;
3759 expr = c_fully_fold (expr, false, NULL);
3760 stmt = objc_build_throw_stmt (expr);
3761 goto expect_semicolon;
3765 gcc_assert (c_dialect_objc ());
3766 c_parser_objc_try_catch_statement (parser);
3768 case RID_AT_SYNCHRONIZED:
3769 gcc_assert (c_dialect_objc ());
3770 c_parser_objc_synchronized_statement (parser);
3777 c_parser_consume_token (parser);
3779 case CPP_CLOSE_PAREN:
3780 case CPP_CLOSE_SQUARE:
3781 /* Avoid infinite loop in error recovery:
3782 c_parser_skip_until_found stops at a closing nesting
3783 delimiter without consuming it, but here we need to consume
3784 it to proceed further. */
3785 c_parser_error (parser, "expected statement");
3786 c_parser_consume_token (parser);
3789 c_parser_pragma (parser, pragma_stmt);
3793 stmt = c_finish_expr_stmt (c_parser_expression_conv (parser).value);
3795 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
3798 /* Two cases cannot and do not have line numbers associated: If stmt
3799 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3800 cannot hold line numbers. But that's OK because the statement
3801 will either be changed to a MODIFY_EXPR during gimplification of
3802 the statement expr, or discarded. If stmt was compound, but
3803 without new variables, we will have skipped the creation of a
3804 BIND and will have a bare STATEMENT_LIST. But that's OK because
3805 (recursively) all of the component statements should already have
3806 line numbers assigned. ??? Can we discard no-op statements
3808 protected_set_expr_location (stmt, loc);
3810 parser->in_if_block = in_if_block;
3813 /* Parse the condition from an if, do, while or for statements. */
3816 c_parser_condition (c_parser *parser)
3820 loc = c_parser_peek_token (parser)->location;
3821 cond = c_parser_expression_conv (parser).value;
3822 cond = c_objc_common_truthvalue_conversion (loc, cond);
3823 cond = c_fully_fold (cond, false, NULL);
3824 protected_set_expr_location (cond, loc);
3825 if (warn_sequence_point)
3826 verify_sequence_points (cond);
3830 /* Parse a parenthesized condition from an if, do or while statement.
3836 c_parser_paren_condition (c_parser *parser)
3839 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3840 return error_mark_node;
3841 cond = c_parser_condition (parser);
3842 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
3846 /* Parse a statement which is a block in C99. */
3849 c_parser_c99_block_statement (c_parser *parser)
3851 tree block = c_begin_compound_stmt (flag_isoc99);
3852 c_parser_statement (parser);
3853 return c_end_compound_stmt (block, flag_isoc99);
3856 /* Parse the body of an if statement. This is just parsing a
3857 statement but (a) it is a block in C99, (b) we track whether the
3858 body is an if statement for the sake of -Wparentheses warnings, (c)
3859 we handle an empty body specially for the sake of -Wempty-body
3860 warnings, and (d) we call parser_compound_statement directly
3861 because c_parser_statement_after_labels resets
3862 parser->in_if_block. */
3865 c_parser_if_body (c_parser *parser, bool *if_p)
3867 tree block = c_begin_compound_stmt (flag_isoc99);
3868 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3869 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3870 || (c_parser_next_token_is (parser, CPP_NAME)
3871 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3872 c_parser_label (parser);
3873 *if_p = c_parser_next_token_is_keyword (parser, RID_IF);
3874 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3876 location_t loc = c_parser_peek_token (parser)->location;
3877 add_stmt (build_empty_stmt ());
3878 c_parser_consume_token (parser);
3879 if (!c_parser_next_token_is_keyword (parser, RID_ELSE))
3880 warning_at (loc, OPT_Wempty_body,
3881 "suggest braces around empty body in an %<if%> statement");
3883 else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
3884 add_stmt (c_parser_compound_statement (parser));
3886 c_parser_statement_after_labels (parser);
3887 return c_end_compound_stmt (block, flag_isoc99);
3890 /* Parse the else body of an if statement. This is just parsing a
3891 statement but (a) it is a block in C99, (b) we handle an empty body
3892 specially for the sake of -Wempty-body warnings. */
3895 c_parser_else_body (c_parser *parser)
3897 tree block = c_begin_compound_stmt (flag_isoc99);
3898 while (c_parser_next_token_is_keyword (parser, RID_CASE)
3899 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
3900 || (c_parser_next_token_is (parser, CPP_NAME)
3901 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
3902 c_parser_label (parser);
3903 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3905 warning_at (c_parser_peek_token (parser)->location,
3907 "suggest braces around empty body in an %<else%> statement");
3908 add_stmt (build_empty_stmt ());
3909 c_parser_consume_token (parser);
3912 c_parser_statement_after_labels (parser);
3913 return c_end_compound_stmt (block, flag_isoc99);
3916 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3919 if ( expression ) statement
3920 if ( expression ) statement else statement
3924 c_parser_if_statement (c_parser *parser)
3929 bool first_if = false;
3930 tree first_body, second_body;
3933 gcc_assert (c_parser_next_token_is_keyword (parser, RID_IF));
3934 c_parser_consume_token (parser);
3935 block = c_begin_compound_stmt (flag_isoc99);
3936 loc = c_parser_peek_token (parser)->location;
3937 cond = c_parser_paren_condition (parser);
3938 in_if_block = parser->in_if_block;
3939 parser->in_if_block = true;
3940 first_body = c_parser_if_body (parser, &first_if);
3941 parser->in_if_block = in_if_block;
3942 if (c_parser_next_token_is_keyword (parser, RID_ELSE))
3944 c_parser_consume_token (parser);
3945 second_body = c_parser_else_body (parser);
3948 second_body = NULL_TREE;
3949 c_finish_if_stmt (loc, cond, first_body, second_body, first_if);
3950 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3953 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3956 switch (expression) statement
3960 c_parser_switch_statement (c_parser *parser)
3962 tree block, expr, body, save_break;
3963 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SWITCH));
3964 c_parser_consume_token (parser);
3965 block = c_begin_compound_stmt (flag_isoc99);
3966 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3968 expr = c_parser_expression (parser).value;
3969 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
3972 expr = error_mark_node;
3973 c_start_case (expr);
3974 save_break = c_break_label;
3975 c_break_label = NULL_TREE;
3976 body = c_parser_c99_block_statement (parser);
3977 c_finish_case (body);
3979 add_stmt (build1 (LABEL_EXPR, void_type_node, c_break_label));
3980 c_break_label = save_break;
3981 add_stmt (c_end_compound_stmt (block, flag_isoc99));
3984 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
3987 while (expression) statement
3991 c_parser_while_statement (c_parser *parser)
3993 tree block, cond, body, save_break, save_cont;
3995 gcc_assert (c_parser_next_token_is_keyword (parser, RID_WHILE));
3996 c_parser_consume_token (parser);
3997 block = c_begin_compound_stmt (flag_isoc99);
3998 loc = c_parser_peek_token (parser)->location;
3999 cond = c_parser_paren_condition (parser);
4000 save_break = c_break_label;
4001 c_break_label = NULL_TREE;
4002 save_cont = c_cont_label;
4003 c_cont_label = NULL_TREE;
4004 body = c_parser_c99_block_statement (parser);
4005 c_finish_loop (loc, cond, NULL, body, c_break_label, c_cont_label, true);
4006 add_stmt (c_end_compound_stmt (block, flag_isoc99));
4007 c_break_label = save_break;
4008 c_cont_label = save_cont;
4011 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
4014 do statement while ( expression ) ;
4018 c_parser_do_statement (c_parser *parser)
4020 tree block, cond, body, save_break, save_cont, new_break, new_cont;
4022 gcc_assert (c_parser_next_token_is_keyword (parser, RID_DO));
4023 c_parser_consume_token (parser);
4024 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4025 warning_at (c_parser_peek_token (parser)->location,
4027 "suggest braces around empty body in %<do%> statement");
4028 block = c_begin_compound_stmt (flag_isoc99);
4029 loc = c_parser_peek_token (parser)->location;
4030 save_break = c_break_label;
4031 c_break_label = NULL_TREE;
4032 save_cont = c_cont_label;
4033 c_cont_label = NULL_TREE;
4034 body = c_parser_c99_block_statement (parser);
4035 c_parser_require_keyword (parser, RID_WHILE, "expected %<while%>");
4036 new_break = c_break_label;
4037 c_break_label = save_break;
4038 new_cont = c_cont_label;
4039 c_cont_label = save_cont;
4040 cond = c_parser_paren_condition (parser);
4041 if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
4042 c_parser_skip_to_end_of_block_or_statement (parser);
4043 c_finish_loop (loc, cond, NULL, body, new_break, new_cont, false);
4044 add_stmt (c_end_compound_stmt (block, flag_isoc99));
4047 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4050 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4051 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4053 The form with a declaration is new in C99.
4055 ??? In accordance with the old parser, the declaration may be a
4056 nested function, which is then rejected in check_for_loop_decls,
4057 but does it make any sense for this to be included in the grammar?
4058 Note in particular that the nested function does not include a
4059 trailing ';', whereas the "declaration" production includes one.
4060 Also, can we reject bad declarations earlier and cheaper than
4061 check_for_loop_decls? */
4064 c_parser_for_statement (c_parser *parser)
4066 tree block, cond, incr, save_break, save_cont, body;
4068 gcc_assert (c_parser_next_token_is_keyword (parser, RID_FOR));
4069 loc = c_parser_peek_token (parser)->location;
4070 c_parser_consume_token (parser);
4071 block = c_begin_compound_stmt (flag_isoc99);
4072 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4074 /* Parse the initialization declaration or expression. */
4075 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4077 c_parser_consume_token (parser);
4078 c_finish_expr_stmt (NULL_TREE);
4080 else if (c_parser_next_token_starts_declspecs (parser))
4082 c_parser_declaration_or_fndef (parser, true, true, true, true);
4083 check_for_loop_decls ();
4085 else if (c_parser_next_token_is_keyword (parser, RID_EXTENSION))
4087 /* __extension__ can start a declaration, but is also an
4088 unary operator that can start an expression. Consume all
4089 but the last of a possible series of __extension__ to
4091 while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD
4092 && (c_parser_peek_2nd_token (parser)->keyword
4094 c_parser_consume_token (parser);
4095 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser)))
4098 ext = disable_extension_diagnostics ();
4099 c_parser_consume_token (parser);
4100 c_parser_declaration_or_fndef (parser, true, true, true, true);
4101 restore_extension_diagnostics (ext);
4102 check_for_loop_decls ();
4110 c_finish_expr_stmt (c_parser_expression (parser).value);
4111 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4113 /* Parse the loop condition. */
4114 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4116 c_parser_consume_token (parser);
4121 cond = c_parser_condition (parser);
4122 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4124 /* Parse the increment expression. */
4125 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4126 incr = c_process_expr_stmt (NULL_TREE);
4128 incr = c_process_expr_stmt (c_parser_expression (parser).value);
4129 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4133 cond = error_mark_node;
4134 incr = error_mark_node;
4136 save_break = c_break_label;
4137 c_break_label = NULL_TREE;
4138 save_cont = c_cont_label;
4139 c_cont_label = NULL_TREE;
4140 body = c_parser_c99_block_statement (parser);
4141 c_finish_loop (loc, cond, incr, body, c_break_label, c_cont_label, true);
4142 add_stmt (c_end_compound_stmt (block, flag_isoc99));
4143 c_break_label = save_break;
4144 c_cont_label = save_cont;
4147 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4148 statement with inputs, outputs, clobbers, and volatile tag
4152 asm type-qualifier[opt] ( asm-argument ) ;
4156 asm-string-literal : asm-operands[opt]
4157 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4158 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4160 Qualifiers other than volatile are accepted in the syntax but
4164 c_parser_asm_statement (c_parser *parser)
4166 tree quals, str, outputs, inputs, clobbers, ret;
4168 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM));
4169 c_parser_consume_token (parser);
4170 if (c_parser_next_token_is_keyword (parser, RID_VOLATILE))
4172 quals = c_parser_peek_token (parser)->value;
4173 c_parser_consume_token (parser);
4175 else if (c_parser_next_token_is_keyword (parser, RID_CONST)
4176 || c_parser_next_token_is_keyword (parser, RID_RESTRICT))
4178 warning_at (c_parser_peek_token (parser)->location,
4180 "%E qualifier ignored on asm",
4181 c_parser_peek_token (parser)->value);
4183 c_parser_consume_token (parser);
4187 /* ??? Follow the C++ parser rather than using the
4188 lex_untranslated_string kludge. */
4189 parser->lex_untranslated_string = true;
4190 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4192 parser->lex_untranslated_string = false;
4195 str = c_parser_asm_string_literal (parser);
4196 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4199 outputs = NULL_TREE;
4201 clobbers = NULL_TREE;
4204 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4206 parser->lex_untranslated_string = false;
4207 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4211 /* Parse outputs. */
4212 if (c_parser_next_token_is (parser, CPP_COLON)
4213 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4214 outputs = NULL_TREE;
4216 outputs = c_parser_asm_operands (parser, false);
4217 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4220 clobbers = NULL_TREE;
4223 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4225 parser->lex_untranslated_string = false;
4226 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4230 if (c_parser_next_token_is (parser, CPP_COLON)
4231 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4234 inputs = c_parser_asm_operands (parser, true);
4235 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4237 clobbers = NULL_TREE;
4240 if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>"))
4242 parser->lex_untranslated_string = false;
4243 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4246 /* Parse clobbers. */
4247 clobbers = c_parser_asm_clobbers (parser);
4249 parser->lex_untranslated_string = false;
4250 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
4252 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4255 if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
4256 c_parser_skip_to_end_of_block_or_statement (parser);
4257 ret = build_asm_stmt (quals, build_asm_expr (str, outputs, inputs,
4262 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4263 not outputs), apply the default conversion of functions and arrays
4268 asm-operands , asm-operand
4271 asm-string-literal ( expression )
4272 [ identifier ] asm-string-literal ( expression )
4276 c_parser_asm_operands (c_parser *parser, bool convert_p)
4278 tree list = NULL_TREE;
4283 if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
4285 c_parser_consume_token (parser);
4286 if (c_parser_next_token_is (parser, CPP_NAME))
4288 tree id = c_parser_peek_token (parser)->value;
4289 c_parser_consume_token (parser);
4290 name = build_string (IDENTIFIER_LENGTH (id),
4291 IDENTIFIER_POINTER (id));
4295 c_parser_error (parser, "expected identifier");
4296 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, NULL);
4299 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
4304 str = c_parser_asm_string_literal (parser);
4305 if (str == NULL_TREE)
4307 parser->lex_untranslated_string = false;
4308 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4310 parser->lex_untranslated_string = true;
4313 expr = c_parser_expression (parser);
4315 expr = default_function_array_conversion (expr);
4316 expr.value = c_fully_fold (expr.value, false, NULL);
4317 parser->lex_untranslated_string = true;
4318 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
4320 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
4323 list = chainon (list, build_tree_list (build_tree_list (name, str),
4325 if (c_parser_next_token_is (parser, CPP_COMMA))
4326 c_parser_consume_token (parser);
4333 /* Parse asm clobbers, a GNU extension.
4337 asm-clobbers , asm-string-literal
4341 c_parser_asm_clobbers (c_parser *parser)
4343 tree list = NULL_TREE;
4346 tree str = c_parser_asm_string_literal (parser);
4348 list = tree_cons (NULL_TREE, str, list);
4351 if (c_parser_next_token_is (parser, CPP_COMMA))
4352 c_parser_consume_token (parser);
4359 /* Parse an expression other than a compound expression; that is, an
4360 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4361 NULL then it is an Objective-C message expression which is the
4362 primary-expression starting the expression as an initializer.
4364 assignment-expression:
4365 conditional-expression
4366 unary-expression assignment-operator assignment-expression
4368 assignment-operator: one of
4369 = *= /= %= += -= <<= >>= &= ^= |=
4371 In GNU C we accept any conditional expression on the LHS and
4372 diagnose the invalid lvalue rather than producing a syntax
4375 static struct c_expr
4376 c_parser_expr_no_commas (c_parser *parser, struct c_expr *after)
4378 struct c_expr lhs, rhs, ret;
4379 enum tree_code code;
4380 location_t op_location;
4381 gcc_assert (!after || c_dialect_objc ());
4382 lhs = c_parser_conditional_expression (parser, after);
4383 op_location = c_parser_peek_token (parser)->location;
4384 switch (c_parser_peek_token (parser)->type)
4393 code = TRUNC_DIV_EXPR;
4396 code = TRUNC_MOD_EXPR;
4411 code = BIT_AND_EXPR;
4414 code = BIT_XOR_EXPR;
4417 code = BIT_IOR_EXPR;
4422 c_parser_consume_token (parser);
4423 rhs = c_parser_expr_no_commas (parser, NULL);
4424 rhs = default_function_array_conversion (rhs);
4425 ret.value = build_modify_expr (op_location, lhs.value, code, rhs.value);
4426 if (code == NOP_EXPR)
4427 ret.original_code = MODIFY_EXPR;
4430 TREE_NO_WARNING (ret.value) = 1;
4431 ret.original_code = ERROR_MARK;
4436 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4437 is not NULL then it is an Objective-C message expression which is
4438 the primary-expression starting the expression as an initializer.
4440 conditional-expression:
4441 logical-OR-expression
4442 logical-OR-expression ? expression : conditional-expression
4446 conditional-expression:
4447 logical-OR-expression ? : conditional-expression
4450 static struct c_expr
4451 c_parser_conditional_expression (c_parser *parser, struct c_expr *after)
4453 struct c_expr cond, exp1, exp2, ret;
4454 location_t cond_loc;
4456 gcc_assert (!after || c_dialect_objc ());
4458 cond_loc = c_parser_peek_token (parser)->location;
4459 cond = c_parser_binary_expression (parser, after);
4460 protected_set_expr_location (cond.value, cond_loc);
4462 if (c_parser_next_token_is_not (parser, CPP_QUERY))
4464 cond = default_function_array_conversion (cond);
4465 c_parser_consume_token (parser);
4466 if (c_parser_next_token_is (parser, CPP_COLON))
4468 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
4469 "ISO C forbids omitting the middle term of a ?: expression");
4470 /* Make sure first operand is calculated only once. */
4471 exp1.value = c_save_expr (default_conversion (cond.value));
4472 cond.value = c_objc_common_truthvalue_conversion (cond_loc, exp1.value);
4473 skip_evaluation += cond.value == truthvalue_true_node;
4478 = c_objc_common_truthvalue_conversion
4479 (cond_loc, default_conversion (cond.value));
4480 skip_evaluation += cond.value == truthvalue_false_node;
4481 exp1 = c_parser_expression_conv (parser);
4482 skip_evaluation += ((cond.value == truthvalue_true_node)
4483 - (cond.value == truthvalue_false_node));
4485 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
4487 skip_evaluation -= cond.value == truthvalue_true_node;
4488 ret.value = error_mark_node;
4489 ret.original_code = ERROR_MARK;
4492 exp2 = c_parser_conditional_expression (parser, NULL);
4493 exp2 = default_function_array_conversion (exp2);
4494 skip_evaluation -= cond.value == truthvalue_true_node;
4495 ret.value = build_conditional_expr (cond.value,
4496 cond.original_code == C_MAYBE_CONST_EXPR,
4497 exp1.value, exp2.value);
4498 ret.original_code = ERROR_MARK;
4502 /* Parse a binary expression; that is, a logical-OR-expression (C90
4503 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4504 an Objective-C message expression which is the primary-expression
4505 starting the expression as an initializer.
4507 multiplicative-expression:
4509 multiplicative-expression * cast-expression
4510 multiplicative-expression / cast-expression
4511 multiplicative-expression % cast-expression
4513 additive-expression:
4514 multiplicative-expression
4515 additive-expression + multiplicative-expression
4516 additive-expression - multiplicative-expression
4520 shift-expression << additive-expression
4521 shift-expression >> additive-expression
4523 relational-expression:
4525 relational-expression < shift-expression
4526 relational-expression > shift-expression
4527 relational-expression <= shift-expression
4528 relational-expression >= shift-expression
4530 equality-expression:
4531 relational-expression
4532 equality-expression == relational-expression
4533 equality-expression != relational-expression
4537 AND-expression & equality-expression
4539 exclusive-OR-expression:
4541 exclusive-OR-expression ^ AND-expression
4543 inclusive-OR-expression:
4544 exclusive-OR-expression
4545 inclusive-OR-expression | exclusive-OR-expression
4547 logical-AND-expression:
4548 inclusive-OR-expression
4549 logical-AND-expression && inclusive-OR-expression
4551 logical-OR-expression:
4552 logical-AND-expression
4553 logical-OR-expression || logical-AND-expression
4556 static struct c_expr
4557 c_parser_binary_expression (c_parser *parser, struct c_expr *after)
4559 /* A binary expression is parsed using operator-precedence parsing,
4560 with the operands being cast expressions. All the binary
4561 operators are left-associative. Thus a binary expression is of
4564 E0 op1 E1 op2 E2 ...
4566 which we represent on a stack. On the stack, the precedence
4567 levels are strictly increasing. When a new operator is
4568 encountered of higher precedence than that at the top of the
4569 stack, it is pushed; its LHS is the top expression, and its RHS
4570 is everything parsed until it is popped. When a new operator is
4571 encountered with precedence less than or equal to that at the top
4572 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4573 by the result of the operation until the operator at the top of
4574 the stack has lower precedence than the new operator or there is
4575 only one element on the stack; then the top expression is the LHS
4576 of the new operator. In the case of logical AND and OR
4577 expressions, we also need to adjust skip_evaluation as
4578 appropriate when the operators are pushed and popped. */
4580 /* The precedence levels, where 0 is a dummy lowest level used for
4581 the bottom of the stack. */
4597 /* The expression at this stack level. */
4599 /* The precedence of the operator on its left, PREC_NONE at the
4600 bottom of the stack. */
4602 /* The operation on its left. */
4606 /* Location of the binary operator. */
4607 location_t binary_loc = UNKNOWN_LOCATION; /* Quiet warning. */
4610 switch (stack[sp].op) \
4612 case TRUTH_ANDIF_EXPR: \
4613 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4615 case TRUTH_ORIF_EXPR: \
4616 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4621 stack[sp - 1].expr \
4622 = default_function_array_conversion (stack[sp - 1].expr); \
4624 = default_function_array_conversion (stack[sp].expr); \
4625 stack[sp - 1].expr = parser_build_binary_op (binary_loc, \
4627 stack[sp - 1].expr, \
4631 gcc_assert (!after || c_dialect_objc ());
4632 stack[0].expr = c_parser_cast_expression (parser, after);
4633 stack[0].prec = PREC_NONE;
4638 enum tree_code ocode;
4641 switch (c_parser_peek_token (parser)->type)
4649 ocode = TRUNC_DIV_EXPR;
4653 ocode = TRUNC_MOD_EXPR;
4665 ocode = LSHIFT_EXPR;
4669 ocode = RSHIFT_EXPR;
4683 case CPP_GREATER_EQ:
4696 oprec = PREC_BITAND;
4697 ocode = BIT_AND_EXPR;
4700 oprec = PREC_BITXOR;
4701 ocode = BIT_XOR_EXPR;
4705 ocode = BIT_IOR_EXPR;
4708 oprec = PREC_LOGAND;
4709 ocode = TRUTH_ANDIF_EXPR;
4713 ocode = TRUTH_ORIF_EXPR;
4716 /* Not a binary operator, so end of the binary
4720 binary_loc = c_parser_peek_token (parser)->location;
4721 c_parser_consume_token (parser);
4722 while (oprec <= stack[sp].prec)
4726 case TRUTH_ANDIF_EXPR:
4728 = default_function_array_conversion (stack[sp].expr);
4729 stack[sp].expr.value = c_objc_common_truthvalue_conversion
4730 (binary_loc, default_conversion (stack[sp].expr.value));
4731 skip_evaluation += stack[sp].expr.value == truthvalue_false_node;
4733 case TRUTH_ORIF_EXPR:
4735 = default_function_array_conversion (stack[sp].expr);
4736 stack[sp].expr.value = c_objc_common_truthvalue_conversion
4737 (binary_loc, default_conversion (stack[sp].expr.value));
4738 skip_evaluation += stack[sp].expr.value == truthvalue_true_node;
4744 stack[sp].expr = c_parser_cast_expression (parser, NULL);
4745 stack[sp].prec = oprec;
4746 stack[sp].op = ocode;
4751 return stack[0].expr;
4755 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4756 NULL then it is an Objective-C message expression which is the
4757 primary-expression starting the expression as an initializer.
4761 ( type-name ) unary-expression
4764 static struct c_expr
4765 c_parser_cast_expression (c_parser *parser, struct c_expr *after)
4767 gcc_assert (!after || c_dialect_objc ());
4769 return c_parser_postfix_expression_after_primary (parser, *after);
4770 /* If the expression begins with a parenthesized type name, it may
4771 be either a cast or a compound literal; we need to see whether
4772 the next character is '{' to tell the difference. If not, it is
4773 an unary expression. */
4774 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4775 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4777 struct c_type_name *type_name;
4780 c_parser_consume_token (parser);
4781 type_name = c_parser_type_name (parser);
4782 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4783 if (type_name == NULL)
4785 ret.value = error_mark_node;
4786 ret.original_code = ERROR_MARK;
4790 /* Save casted types in the function's used types hash table. */
4791 used_types_insert (type_name->specs->type);
4793 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4794 return c_parser_postfix_expression_after_paren_type (parser,
4796 expr = c_parser_cast_expression (parser, NULL);
4797 expr = default_function_array_conversion (expr);
4798 ret.value = c_cast_expr (type_name, expr.value);
4799 ret.original_code = ERROR_MARK;
4803 return c_parser_unary_expression (parser);
4806 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4812 unary-operator cast-expression
4813 sizeof unary-expression
4814 sizeof ( type-name )
4816 unary-operator: one of
4822 __alignof__ unary-expression
4823 __alignof__ ( type-name )
4826 unary-operator: one of
4827 __extension__ __real__ __imag__
4829 In addition, the GNU syntax treats ++ and -- as unary operators, so
4830 they may be applied to cast expressions with errors for non-lvalues
4833 static struct c_expr
4834 c_parser_unary_expression (c_parser *parser)
4837 struct c_expr ret, op;
4838 location_t loc = c_parser_peek_token (parser)->location;
4839 switch (c_parser_peek_token (parser)->type)
4842 c_parser_consume_token (parser);
4843 op = c_parser_cast_expression (parser, NULL);
4844 op = default_function_array_conversion (op);
4845 return parser_build_unary_op (PREINCREMENT_EXPR, op, loc);
4846 case CPP_MINUS_MINUS:
4847 c_parser_consume_token (parser);
4848 op = c_parser_cast_expression (parser, NULL);
4849 op = default_function_array_conversion (op);
4850 return parser_build_unary_op (PREDECREMENT_EXPR, op, loc);
4852 c_parser_consume_token (parser);
4853 return parser_build_unary_op (ADDR_EXPR,
4854 c_parser_cast_expression (parser, NULL),
4857 c_parser_consume_token (parser);
4858 op = c_parser_cast_expression (parser, NULL);
4859 op = default_function_array_conversion (op);
4860 ret.value = build_indirect_ref (loc, op.value, "unary *");
4861 ret.original_code = ERROR_MARK;
4864 if (!c_dialect_objc () && !in_system_header)
4865 warning_at (c_parser_peek_token (parser)->location,
4867 "traditional C rejects the unary plus operator");
4868 c_parser_consume_token (parser);
4869 op = c_parser_cast_expression (parser, NULL);
4870 op = default_function_array_conversion (op);
4871 return parser_build_unary_op (CONVERT_EXPR, op, loc);
4873 c_parser_consume_token (parser);
4874 op = c_parser_cast_expression (parser, NULL);
4875 op = default_function_array_conversion (op);
4876 return parser_build_unary_op (NEGATE_EXPR, op, loc);
4878 c_parser_consume_token (parser);
4879 op = c_parser_cast_expression (parser, NULL);
4880 op = default_function_array_conversion (op);
4881 return parser_build_unary_op (BIT_NOT_EXPR, op, loc);
4883 c_parser_consume_token (parser);
4884 op = c_parser_cast_expression (parser, NULL);
4885 op = default_function_array_conversion (op);
4886 return parser_build_unary_op (TRUTH_NOT_EXPR, op, loc);
4888 /* Refer to the address of a label as a pointer. */
4889 c_parser_consume_token (parser);
4890 if (c_parser_next_token_is (parser, CPP_NAME))
4892 ret.value = finish_label_address_expr
4893 (c_parser_peek_token (parser)->value, loc);
4894 c_parser_consume_token (parser);
4898 c_parser_error (parser, "expected identifier");
4899 ret.value = error_mark_node;
4901 ret.original_code = ERROR_MARK;
4904 switch (c_parser_peek_token (parser)->keyword)
4907 return c_parser_sizeof_expression (parser);
4909 return c_parser_alignof_expression (parser);
4911 c_parser_consume_token (parser);
4912 ext = disable_extension_diagnostics ();
4913 ret = c_parser_cast_expression (parser, NULL);
4914 restore_extension_diagnostics (ext);
4917 c_parser_consume_token (parser);
4918 op = c_parser_cast_expression (parser, NULL);
4919 op = default_function_array_conversion (op);
4920 return parser_build_unary_op (REALPART_EXPR, op, loc);
4922 c_parser_consume_token (parser);
4923 op = c_parser_cast_expression (parser, NULL);
4924 op = default_function_array_conversion (op);
4925 return parser_build_unary_op (IMAGPART_EXPR, op, loc);
4927 return c_parser_postfix_expression (parser);
4930 return c_parser_postfix_expression (parser);
4934 /* Parse a sizeof expression. */
4936 static struct c_expr
4937 c_parser_sizeof_expression (c_parser *parser)
4940 location_t expr_loc;
4941 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SIZEOF));
4942 c_parser_consume_token (parser);
4945 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
4946 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
4948 /* Either sizeof ( type-name ) or sizeof unary-expression
4949 starting with a compound literal. */
4950 struct c_type_name *type_name;
4951 c_parser_consume_token (parser);
4952 expr_loc = c_parser_peek_token (parser)->location;
4953 type_name = c_parser_type_name (parser);
4954 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4955 if (type_name == NULL)
4960 ret.value = error_mark_node;
4961 ret.original_code = ERROR_MARK;
4964 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4966 expr = c_parser_postfix_expression_after_paren_type (parser,
4970 /* sizeof ( type-name ). */
4973 return c_expr_sizeof_type (type_name);
4977 expr_loc = c_parser_peek_token (parser)->location;
4978 expr = c_parser_unary_expression (parser);
4982 if (TREE_CODE (expr.value) == COMPONENT_REF
4983 && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1)))
4984 error_at (expr_loc, "%<sizeof%> applied to a bit-field");
4985 return c_expr_sizeof_expr (expr);
4989 /* Parse an alignof expression. */
4991 static struct c_expr
4992 c_parser_alignof_expression (c_parser *parser)
4995 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF));
4996 c_parser_consume_token (parser);
4999 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
5000 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
5002 /* Either __alignof__ ( type-name ) or __alignof__
5003 unary-expression starting with a compound literal. */
5004 struct c_type_name *type_name;
5006 c_parser_consume_token (parser);
5007 type_name = c_parser_type_name (parser);
5008 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
5009 if (type_name == NULL)
5014 ret.value = error_mark_node;
5015 ret.original_code = ERROR_MARK;
5018 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5020 expr = c_parser_postfix_expression_after_paren_type (parser,
5024 /* alignof ( type-name ). */
5027 ret.value = c_alignof (groktypename (type_name, NULL, NULL));
5028 ret.original_code = ERROR_MARK;
5034 expr = c_parser_unary_expression (parser);
5038 ret.value = c_alignof_expr (expr.value);
5039 ret.original_code = ERROR_MARK;
5044 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
5048 postfix-expression [ expression ]
5049 postfix-expression ( argument-expression-list[opt] )
5050 postfix-expression . identifier
5051 postfix-expression -> identifier
5052 postfix-expression ++
5053 postfix-expression --
5054 ( type-name ) { initializer-list }
5055 ( type-name ) { initializer-list , }
5057 argument-expression-list:
5059 argument-expression-list , argument-expression
5071 (treated as a keyword in GNU C)
5074 ( compound-statement )
5075 __builtin_va_arg ( assignment-expression , type-name )
5076 __builtin_offsetof ( type-name , offsetof-member-designator )
5077 __builtin_choose_expr ( assignment-expression ,
5078 assignment-expression ,
5079 assignment-expression )
5080 __builtin_types_compatible_p ( type-name , type-name )
5082 offsetof-member-designator:
5084 offsetof-member-designator . identifier
5085 offsetof-member-designator [ expression ]
5090 [ objc-receiver objc-message-args ]
5091 @selector ( objc-selector-arg )
5092 @protocol ( identifier )
5093 @encode ( type-name )
5097 static struct c_expr
5098 c_parser_postfix_expression (c_parser *parser)
5100 struct c_expr expr, e1, e2, e3;
5101 struct c_type_name *t1, *t2;
5103 switch (c_parser_peek_token (parser)->type)
5106 expr.value = c_parser_peek_token (parser)->value;
5107 expr.original_code = ERROR_MARK;
5108 loc = c_parser_peek_token (parser)->location;
5109 c_parser_consume_token (parser);
5110 if (TREE_CODE (expr.value) == FIXED_CST
5111 && !targetm.fixed_point_supported_p ())
5113 error_at (loc, "fixed-point types not supported for this target");
5114 expr.value = error_mark_node;
5121 expr.value = c_parser_peek_token (parser)->value;
5122 expr.original_code = ERROR_MARK;
5123 c_parser_consume_token (parser);
5129 expr.value = c_parser_peek_token (parser)->value;
5130 expr.original_code = STRING_CST;
5131 c_parser_consume_token (parser);
5133 case CPP_OBJC_STRING:
5134 gcc_assert (c_dialect_objc ());
5136 = objc_build_string_object (c_parser_peek_token (parser)->value);
5137 expr.original_code = ERROR_MARK;
5138 c_parser_consume_token (parser);
5141 if (c_parser_peek_token (parser)->id_kind != C_ID_ID)
5143 c_parser_error (parser, "expected expression");
5144 expr.value = error_mark_node;
5145 expr.original_code = ERROR_MARK;
5149 tree id = c_parser_peek_token (parser)->value;
5150 location_t loc = c_parser_peek_token (parser)->location;
5151 c_parser_consume_token (parser);
5152 expr.value = build_external_ref (id,
5153 (c_parser_peek_token (parser)->type
5154 == CPP_OPEN_PAREN), loc);
5155 expr.original_code = ERROR_MARK;
5158 case CPP_OPEN_PAREN:
5159 /* A parenthesized expression, statement expression or compound
5161 if (c_parser_peek_2nd_token (parser)->type == CPP_OPEN_BRACE)
5163 /* A statement expression. */
5165 location_t here = c_parser_peek_token (parser)->location;
5166 c_parser_consume_token (parser);
5167 c_parser_consume_token (parser);
5168 if (cur_stmt_list == NULL)
5170 error_at (here, "braced-group within expression allowed "
5171 "only inside a function");
5172 parser->error = true;
5173 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
5174 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5175 expr.value = error_mark_node;
5176 expr.original_code = ERROR_MARK;
5179 stmt = c_begin_stmt_expr ();
5180 c_parser_compound_statement_nostart (parser);
5181 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5183 pedwarn (here, OPT_pedantic,
5184 "ISO C forbids braced-groups within expressions");
5185 expr.value = c_finish_stmt_expr (stmt);
5186 expr.original_code = ERROR_MARK;
5188 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser)))
5190 /* A compound literal. ??? Can we actually get here rather
5191 than going directly to
5192 c_parser_postfix_expression_after_paren_type from
5194 struct c_type_name *type_name;
5195 c_parser_consume_token (parser);
5196 type_name = c_parser_type_name (parser);
5197 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5199 if (type_name == NULL)
5201 expr.value = error_mark_node;
5202 expr.original_code = ERROR_MARK;
5205 expr = c_parser_postfix_expression_after_paren_type (parser,
5210 /* A parenthesized expression. */
5211 c_parser_consume_token (parser);
5212 expr = c_parser_expression (parser);
5213 if (TREE_CODE (expr.value) == MODIFY_EXPR)
5214 TREE_NO_WARNING (expr.value) = 1;
5215 if (expr.original_code != C_MAYBE_CONST_EXPR)
5216 expr.original_code = ERROR_MARK;
5217 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5222 switch (c_parser_peek_token (parser)->keyword)
5224 case RID_FUNCTION_NAME:
5225 case RID_PRETTY_FUNCTION_NAME:
5226 case RID_C99_FUNCTION_NAME:
5227 expr.value = fname_decl (c_parser_peek_token (parser)->location,
5228 c_parser_peek_token (parser)->keyword,
5229 c_parser_peek_token (parser)->value);
5230 expr.original_code = ERROR_MARK;
5231 c_parser_consume_token (parser);
5234 c_parser_consume_token (parser);
5235 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5237 expr.value = error_mark_node;
5238 expr.original_code = ERROR_MARK;
5241 e1 = c_parser_expr_no_commas (parser, NULL);
5242 e1.value = c_fully_fold (e1.value, false, NULL);
5243 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5245 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5246 expr.value = error_mark_node;
5247 expr.original_code = ERROR_MARK;
5250 t1 = c_parser_type_name (parser);
5251 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5255 expr.value = error_mark_node;
5256 expr.original_code = ERROR_MARK;
5260 tree type_expr = NULL_TREE;
5261 expr.value = build_va_arg (e1.value, groktypename (t1,
5266 expr.value = build2 (C_MAYBE_CONST_EXPR,
5267 TREE_TYPE (expr.value), type_expr,
5269 C_MAYBE_CONST_EXPR_NON_CONST (expr.value) = true;
5271 expr.original_code = ERROR_MARK;
5275 c_parser_consume_token (parser);
5276 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5278 expr.value = error_mark_node;
5279 expr.original_code = ERROR_MARK;
5282 t1 = c_parser_type_name (parser);
5285 expr.value = error_mark_node;
5286 expr.original_code = ERROR_MARK;
5289 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5291 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5292 expr.value = error_mark_node;
5293 expr.original_code = ERROR_MARK;
5297 tree type = groktypename (t1, NULL, NULL);
5299 if (type == error_mark_node)
5300 offsetof_ref = error_mark_node;
5302 offsetof_ref = build1 (INDIRECT_REF, type, null_pointer_node);
5303 /* Parse the second argument to __builtin_offsetof. We
5304 must have one identifier, and beyond that we want to
5305 accept sub structure and sub array references. */
5306 if (c_parser_next_token_is (parser, CPP_NAME))
5308 offsetof_ref = build_component_ref
5309 (offsetof_ref, c_parser_peek_token (parser)->value);
5310 c_parser_consume_token (parser);
5311 while (c_parser_next_token_is (parser, CPP_DOT)
5312 || c_parser_next_token_is (parser,
5314 || c_parser_next_token_is (parser,
5317 if (c_parser_next_token_is (parser, CPP_DEREF))
5319 loc = c_parser_peek_token (parser)->location;
5320 offsetof_ref = build_array_ref (offsetof_ref,
5325 else if (c_parser_next_token_is (parser, CPP_DOT))
5328 c_parser_consume_token (parser);
5329 if (c_parser_next_token_is_not (parser,
5332 c_parser_error (parser, "expected identifier");
5335 offsetof_ref = build_component_ref
5337 c_parser_peek_token (parser)->value);
5338 c_parser_consume_token (parser);
5343 loc = c_parser_peek_token (parser)->location;
5344 c_parser_consume_token (parser);
5345 idx = c_parser_expression (parser).value;
5346 idx = c_fully_fold (idx, false, NULL);
5347 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5349 offsetof_ref = build_array_ref (offsetof_ref, idx, loc);
5354 c_parser_error (parser, "expected identifier");
5355 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5357 expr.value = fold_offsetof (offsetof_ref, NULL_TREE);
5358 expr.original_code = ERROR_MARK;
5361 case RID_CHOOSE_EXPR:
5362 c_parser_consume_token (parser);
5363 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5365 expr.value = error_mark_node;
5366 expr.original_code = ERROR_MARK;
5369 loc = c_parser_peek_token (parser)->location;
5370 e1 = c_parser_expr_no_commas (parser, NULL);
5371 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5373 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5374 expr.value = error_mark_node;
5375 expr.original_code = ERROR_MARK;
5378 e2 = c_parser_expr_no_commas (parser, NULL);
5379 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5381 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5382 expr.value = error_mark_node;
5383 expr.original_code = ERROR_MARK;
5386 e3 = c_parser_expr_no_commas (parser, NULL);
5387 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5392 c = fold (e1.value);
5393 if (TREE_CODE (c) != INTEGER_CST
5394 || !INTEGRAL_TYPE_P (TREE_TYPE (c)))
5396 "first argument to %<__builtin_choose_expr%> not"
5398 constant_expression_warning (c);
5399 expr = integer_zerop (c) ? e3 : e2;
5402 case RID_TYPES_COMPATIBLE_P:
5403 c_parser_consume_token (parser);
5404 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5406 expr.value = error_mark_node;
5407 expr.original_code = ERROR_MARK;
5410 t1 = c_parser_type_name (parser);
5413 expr.value = error_mark_node;
5414 expr.original_code = ERROR_MARK;
5417 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
5419 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5420 expr.value = error_mark_node;
5421 expr.original_code = ERROR_MARK;
5424 t2 = c_parser_type_name (parser);
5427 expr.value = error_mark_node;
5428 expr.original_code = ERROR_MARK;
5431 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5436 e1 = TYPE_MAIN_VARIANT (groktypename (t1, NULL, NULL));
5437 e2 = TYPE_MAIN_VARIANT (groktypename (t2, NULL, NULL));
5439 expr.value = comptypes (e1, e2)
5440 ? build_int_cst (NULL_TREE, 1)
5441 : build_int_cst (NULL_TREE, 0);
5442 expr.original_code = ERROR_MARK;
5445 case RID_AT_SELECTOR:
5446 gcc_assert (c_dialect_objc ());
5447 c_parser_consume_token (parser);
5448 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5450 expr.value = error_mark_node;
5451 expr.original_code = ERROR_MARK;
5455 tree sel = c_parser_objc_selector_arg (parser);
5456 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5458 expr.value = objc_build_selector_expr (sel);
5459 expr.original_code = ERROR_MARK;
5462 case RID_AT_PROTOCOL:
5463 gcc_assert (c_dialect_objc ());
5464 c_parser_consume_token (parser);
5465 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5467 expr.value = error_mark_node;
5468 expr.original_code = ERROR_MARK;
5471 if (c_parser_next_token_is_not (parser, CPP_NAME))
5473 c_parser_error (parser, "expected identifier");
5474 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5475 expr.value = error_mark_node;
5476 expr.original_code = ERROR_MARK;
5480 tree id = c_parser_peek_token (parser)->value;
5481 c_parser_consume_token (parser);
5482 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5484 expr.value = objc_build_protocol_expr (id);
5485 expr.original_code = ERROR_MARK;
5489 /* Extension to support C-structures in the archiver. */
5490 gcc_assert (c_dialect_objc ());
5491 c_parser_consume_token (parser);
5492 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5494 expr.value = error_mark_node;
5495 expr.original_code = ERROR_MARK;
5498 t1 = c_parser_type_name (parser);
5501 expr.value = error_mark_node;
5502 expr.original_code = ERROR_MARK;
5503 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5506 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5509 tree type = groktypename (t1, NULL, NULL);
5510 expr.value = objc_build_encode_expr (type);
5511 expr.original_code = ERROR_MARK;
5515 c_parser_error (parser, "expected expression");
5516 expr.value = error_mark_node;
5517 expr.original_code = ERROR_MARK;
5521 case CPP_OPEN_SQUARE:
5522 if (c_dialect_objc ())
5524 tree receiver, args;
5525 c_parser_consume_token (parser);
5526 receiver = c_parser_objc_receiver (parser);
5527 args = c_parser_objc_message_args (parser);
5528 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5530 expr.value = objc_build_message_expr (build_tree_list (receiver,
5532 expr.original_code = ERROR_MARK;
5535 /* Else fall through to report error. */
5537 c_parser_error (parser, "expected expression");
5538 expr.value = error_mark_node;
5539 expr.original_code = ERROR_MARK;
5542 return c_parser_postfix_expression_after_primary (parser, expr);
5545 /* Parse a postfix expression after a parenthesized type name: the
5546 brace-enclosed initializer of a compound literal, possibly followed
5547 by some postfix operators. This is separate because it is not
5548 possible to tell until after the type name whether a cast
5549 expression has a cast or a compound literal, or whether the operand
5550 of sizeof is a parenthesized type name or starts with a compound
5553 static struct c_expr
5554 c_parser_postfix_expression_after_paren_type (c_parser *parser,
5555 struct c_type_name *type_name)
5561 location_t start_loc;
5562 tree type_expr = NULL_TREE;
5563 bool type_expr_const = true;
5564 start_init (NULL_TREE, NULL, 0);
5565 type = groktypename (type_name, &type_expr, &type_expr_const);
5566 start_loc = c_parser_peek_token (parser)->location;
5567 if (type != error_mark_node && C_TYPE_VARIABLE_SIZE (type))
5569 error_at (start_loc, "compound literal has variable size");
5570 type = error_mark_node;
5572 init = c_parser_braced_init (parser, type, false);
5574 maybe_warn_string_init (type, init);
5577 pedwarn (start_loc, OPT_pedantic, "ISO C90 forbids compound literals");
5578 non_const = ((init.value && TREE_CODE (init.value) == CONSTRUCTOR)
5579 ? CONSTRUCTOR_NON_CONST (init.value)
5580 : init.original_code == C_MAYBE_CONST_EXPR);
5581 non_const |= !type_expr_const;
5582 expr.value = build_compound_literal (type, init.value, non_const);
5583 expr.original_code = ERROR_MARK;
5586 if (TREE_CODE (expr.value) == C_MAYBE_CONST_EXPR)
5588 gcc_assert (C_MAYBE_CONST_EXPR_PRE (expr.value) == NULL_TREE);
5589 C_MAYBE_CONST_EXPR_PRE (expr.value) = type_expr;
5593 gcc_assert (!non_const);
5594 expr.value = build2 (C_MAYBE_CONST_EXPR, type,
5595 type_expr, expr.value);
5598 return c_parser_postfix_expression_after_primary (parser, expr);
5601 /* Parse a postfix expression after the initial primary or compound
5602 literal; that is, parse a series of postfix operators. */
5604 static struct c_expr
5605 c_parser_postfix_expression_after_primary (c_parser *parser,
5608 struct c_expr orig_expr;
5609 tree ident, idx, exprlist;
5610 location_t loc = c_parser_peek_token (parser)->location;
5613 switch (c_parser_peek_token (parser)->type)
5615 case CPP_OPEN_SQUARE:
5616 /* Array reference. */
5617 loc = c_parser_peek_token (parser)->location;
5618 c_parser_consume_token (parser);
5619 idx = c_parser_expression (parser).value;
5620 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5622 expr.value = build_array_ref (expr.value, idx, loc);
5623 expr.original_code = ERROR_MARK;
5625 case CPP_OPEN_PAREN:
5626 /* Function call. */
5627 c_parser_consume_token (parser);
5628 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
5629 exprlist = NULL_TREE;
5631 exprlist = c_parser_expr_list (parser, true, false);
5632 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
5635 expr.value = build_function_call (expr.value, exprlist);
5636 expr.original_code = ERROR_MARK;
5637 if (TREE_CODE (expr.value) == INTEGER_CST
5638 && TREE_CODE (orig_expr.value) == FUNCTION_DECL
5639 && DECL_BUILT_IN_CLASS (orig_expr.value) == BUILT_IN_NORMAL
5640 && DECL_FUNCTION_CODE (orig_expr.value) == BUILT_IN_CONSTANT_P)
5641 expr.original_code = C_MAYBE_CONST_EXPR;
5644 /* Structure element reference. */
5645 c_parser_consume_token (parser);
5646 expr = default_function_array_conversion (expr);
5647 if (c_parser_next_token_is (parser, CPP_NAME))
5648 ident = c_parser_peek_token (parser)->value;
5651 c_parser_error (parser, "expected identifier");
5652 expr.value = error_mark_node;
5653 expr.original_code = ERROR_MARK;
5656 c_parser_consume_token (parser);
5657 expr.value = build_component_ref (expr.value, ident);
5658 expr.original_code = ERROR_MARK;
5661 /* Structure element reference. */
5662 c_parser_consume_token (parser);
5663 expr = default_function_array_conversion (expr);
5664 if (c_parser_next_token_is (parser, CPP_NAME))
5665 ident = c_parser_peek_token (parser)->value;
5668 c_parser_error (parser, "expected identifier");
5669 expr.value = error_mark_node;
5670 expr.original_code = ERROR_MARK;
5673 c_parser_consume_token (parser);
5674 expr.value = build_component_ref (build_indirect_ref (loc,
5678 expr.original_code = ERROR_MARK;
5681 /* Postincrement. */
5682 c_parser_consume_token (parser);
5683 expr = default_function_array_conversion (expr);
5684 expr.value = build_unary_op (loc,
5685 POSTINCREMENT_EXPR, expr.value, 0);
5686 expr.original_code = ERROR_MARK;
5688 case CPP_MINUS_MINUS:
5689 /* Postdecrement. */
5690 c_parser_consume_token (parser);
5691 expr = default_function_array_conversion (expr);
5692 expr.value = build_unary_op (loc,
5693 POSTDECREMENT_EXPR, expr.value, 0);
5694 expr.original_code = ERROR_MARK;
5702 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5705 assignment-expression
5706 expression , assignment-expression
5709 static struct c_expr
5710 c_parser_expression (c_parser *parser)
5713 expr = c_parser_expr_no_commas (parser, NULL);
5714 while (c_parser_next_token_is (parser, CPP_COMMA))
5717 c_parser_consume_token (parser);
5718 next = c_parser_expr_no_commas (parser, NULL);
5719 next = default_function_array_conversion (next);
5720 expr.value = build_compound_expr (expr.value, next.value);
5721 expr.original_code = COMPOUND_EXPR;
5726 /* Parse an expression and convert functions or arrays to
5729 static struct c_expr
5730 c_parser_expression_conv (c_parser *parser)
5733 expr = c_parser_expression (parser);
5734 expr = default_function_array_conversion (expr);
5738 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5739 functions and arrays to pointers. If FOLD_P, fold the expressions.
5742 assignment-expression
5743 nonempty-expr-list , assignment-expression
5747 c_parser_expr_list (c_parser *parser, bool convert_p, bool fold_p)
5751 expr = c_parser_expr_no_commas (parser, NULL);
5753 expr = default_function_array_conversion (expr);
5755 expr.value = c_fully_fold (expr.value, false, NULL);
5756 ret = cur = build_tree_list (NULL_TREE, expr.value);
5757 while (c_parser_next_token_is (parser, CPP_COMMA))
5759 c_parser_consume_token (parser);
5760 expr = c_parser_expr_no_commas (parser, NULL);
5762 expr = default_function_array_conversion (expr);
5764 expr.value = c_fully_fold (expr.value, false, NULL);
5765 cur = TREE_CHAIN (cur) = build_tree_list (NULL_TREE, expr.value);
5771 /* Parse Objective-C-specific constructs. */
5773 /* Parse an objc-class-definition.
5775 objc-class-definition:
5776 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5777 objc-class-instance-variables[opt] objc-methodprotolist @end
5778 @implementation identifier objc-superclass[opt]
5779 objc-class-instance-variables[opt]
5780 @interface identifier ( identifier ) objc-protocol-refs[opt]
5781 objc-methodprotolist @end
5782 @implementation identifier ( identifier )
5787 "@interface identifier (" must start "@interface identifier (
5788 identifier ) ...": objc-methodprotolist in the first production may
5789 not start with a parenthesized identifier as a declarator of a data
5790 definition with no declaration specifiers if the objc-superclass,
5791 objc-protocol-refs and objc-class-instance-variables are omitted. */
5794 c_parser_objc_class_definition (c_parser *parser)
5799 if (c_parser_next_token_is_keyword (parser, RID_AT_INTERFACE))
5801 else if (c_parser_next_token_is_keyword (parser, RID_AT_IMPLEMENTATION))
5805 c_parser_consume_token (parser);
5806 if (c_parser_next_token_is_not (parser, CPP_NAME))
5808 c_parser_error (parser, "expected identifier");
5811 id1 = c_parser_peek_token (parser)->value;
5812 c_parser_consume_token (parser);
5813 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
5816 tree proto = NULL_TREE;
5817 c_parser_consume_token (parser);
5818 if (c_parser_next_token_is_not (parser, CPP_NAME))
5820 c_parser_error (parser, "expected identifier");
5821 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5824 id2 = c_parser_peek_token (parser)->value;
5825 c_parser_consume_token (parser);
5826 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
5829 objc_start_category_implementation (id1, id2);
5832 if (c_parser_next_token_is (parser, CPP_LESS))
5833 proto = c_parser_objc_protocol_refs (parser);
5834 objc_start_category_interface (id1, id2, proto);
5835 c_parser_objc_methodprotolist (parser);
5836 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5837 objc_finish_interface ();
5840 if (c_parser_next_token_is (parser, CPP_COLON))
5842 c_parser_consume_token (parser);
5843 if (c_parser_next_token_is_not (parser, CPP_NAME))
5845 c_parser_error (parser, "expected identifier");
5848 superclass = c_parser_peek_token (parser)->value;
5849 c_parser_consume_token (parser);
5852 superclass = NULL_TREE;
5855 tree proto = NULL_TREE;
5856 if (c_parser_next_token_is (parser, CPP_LESS))
5857 proto = c_parser_objc_protocol_refs (parser);
5858 objc_start_class_interface (id1, superclass, proto);
5861 objc_start_class_implementation (id1, superclass);
5862 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5863 c_parser_objc_class_instance_variables (parser);
5866 objc_continue_interface ();
5867 c_parser_objc_methodprotolist (parser);
5868 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
5869 objc_finish_interface ();
5873 objc_continue_implementation ();
5878 /* Parse objc-class-instance-variables.
5880 objc-class-instance-variables:
5881 { objc-instance-variable-decl-list[opt] }
5883 objc-instance-variable-decl-list:
5884 objc-visibility-spec
5885 objc-instance-variable-decl ;
5887 objc-instance-variable-decl-list objc-visibility-spec
5888 objc-instance-variable-decl-list objc-instance-variable-decl ;
5889 objc-instance-variable-decl-list ;
5891 objc-visibility-spec:
5896 objc-instance-variable-decl:
5901 c_parser_objc_class_instance_variables (c_parser *parser)
5903 gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE));
5904 c_parser_consume_token (parser);
5905 while (c_parser_next_token_is_not (parser, CPP_EOF))
5908 /* Parse any stray semicolon. */
5909 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
5911 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
5912 "extra semicolon in struct or union specified");
5913 c_parser_consume_token (parser);
5916 /* Stop if at the end of the instance variables. */
5917 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
5919 c_parser_consume_token (parser);
5922 /* Parse any objc-visibility-spec. */
5923 if (c_parser_next_token_is_keyword (parser, RID_PRIVATE))
5925 c_parser_consume_token (parser);
5926 objc_set_visibility (2);
5929 else if (c_parser_next_token_is_keyword (parser, RID_PROTECTED))
5931 c_parser_consume_token (parser);
5932 objc_set_visibility (0);
5935 else if (c_parser_next_token_is_keyword (parser, RID_PUBLIC))
5937 c_parser_consume_token (parser);
5938 objc_set_visibility (1);
5941 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
5943 c_parser_pragma (parser, pragma_external);
5947 /* Parse some comma-separated declarations. */
5948 decls = c_parser_struct_declaration (parser);
5950 /* Comma-separated instance variables are chained together in
5951 reverse order; add them one by one. */
5952 tree ivar = nreverse (decls);
5953 for (; ivar; ivar = TREE_CHAIN (ivar))
5954 objc_add_instance_variable (copy_node (ivar));
5956 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5960 /* Parse an objc-class-declaration.
5962 objc-class-declaration:
5963 @class identifier-list ;
5967 c_parser_objc_class_declaration (c_parser *parser)
5969 tree list = NULL_TREE;
5970 gcc_assert (c_parser_next_token_is_keyword (parser, RID_CLASS));
5971 c_parser_consume_token (parser);
5972 /* Any identifiers, including those declared as type names, are OK
5977 if (c_parser_next_token_is_not (parser, CPP_NAME))
5979 c_parser_error (parser, "expected identifier");
5982 id = c_parser_peek_token (parser)->value;
5983 list = chainon (list, build_tree_list (NULL_TREE, id));
5984 c_parser_consume_token (parser);
5985 if (c_parser_next_token_is (parser, CPP_COMMA))
5986 c_parser_consume_token (parser);
5990 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
5991 objc_declare_class (list);
5994 /* Parse an objc-alias-declaration.
5996 objc-alias-declaration:
5997 @compatibility_alias identifier identifier ;
6001 c_parser_objc_alias_declaration (c_parser *parser)
6004 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_ALIAS));
6005 c_parser_consume_token (parser);
6006 if (c_parser_next_token_is_not (parser, CPP_NAME))
6008 c_parser_error (parser, "expected identifier");
6009 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
6012 id1 = c_parser_peek_token (parser)->value;
6013 c_parser_consume_token (parser);
6014 if (c_parser_next_token_is_not (parser, CPP_NAME))
6016 c_parser_error (parser, "expected identifier");
6017 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
6020 id2 = c_parser_peek_token (parser)->value;
6021 c_parser_consume_token (parser);
6022 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
6023 objc_declare_alias (id1, id2);
6026 /* Parse an objc-protocol-definition.
6028 objc-protocol-definition:
6029 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
6030 @protocol identifier-list ;
6032 "@protocol identifier ;" should be resolved as "@protocol
6033 identifier-list ;": objc-methodprotolist may not start with a
6034 semicolon in the first alternative if objc-protocol-refs are
6038 c_parser_objc_protocol_definition (c_parser *parser)
6040 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROTOCOL));
6041 c_parser_consume_token (parser);
6042 if (c_parser_next_token_is_not (parser, CPP_NAME))
6044 c_parser_error (parser, "expected identifier");
6047 if (c_parser_peek_2nd_token (parser)->type == CPP_COMMA
6048 || c_parser_peek_2nd_token (parser)->type == CPP_SEMICOLON)
6050 tree list = NULL_TREE;
6051 /* Any identifiers, including those declared as type names, are
6056 if (c_parser_next_token_is_not (parser, CPP_NAME))
6058 c_parser_error (parser, "expected identifier");
6061 id = c_parser_peek_token (parser)->value;
6062 list = chainon (list, build_tree_list (NULL_TREE, id));
6063 c_parser_consume_token (parser);
6064 if (c_parser_next_token_is (parser, CPP_COMMA))
6065 c_parser_consume_token (parser);
6069 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
6070 objc_declare_protocols (list);
6074 tree id = c_parser_peek_token (parser)->value;
6075 tree proto = NULL_TREE;
6076 c_parser_consume_token (parser);
6077 if (c_parser_next_token_is (parser, CPP_LESS))
6078 proto = c_parser_objc_protocol_refs (parser);
6079 parser->objc_pq_context = true;
6080 objc_start_protocol (id, proto);
6081 c_parser_objc_methodprotolist (parser);
6082 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
6083 parser->objc_pq_context = false;
6084 objc_finish_interface ();
6088 /* Parse an objc-method-type.
6095 static enum tree_code
6096 c_parser_objc_method_type (c_parser *parser)
6098 switch (c_parser_peek_token (parser)->type)
6101 c_parser_consume_token (parser);
6104 c_parser_consume_token (parser);
6111 /* Parse an objc-method-definition.
6113 objc-method-definition:
6114 objc-method-type objc-method-decl ;[opt] compound-statement
6118 c_parser_objc_method_definition (c_parser *parser)
6120 enum tree_code type = c_parser_objc_method_type (parser);
6122 objc_set_method_type (type);
6123 parser->objc_pq_context = true;
6124 decl = c_parser_objc_method_decl (parser);
6125 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
6127 c_parser_consume_token (parser);
6128 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
6129 "extra semicolon in method definition specified");
6131 if (!c_parser_next_token_is (parser, CPP_OPEN_BRACE))
6133 c_parser_error (parser, "expected %<{%>");
6136 parser->objc_pq_context = false;
6137 objc_start_method_definition (decl);
6138 add_stmt (c_parser_compound_statement (parser));
6139 objc_finish_method_definition (current_function_decl);
6142 /* Parse an objc-methodprotolist.
6144 objc-methodprotolist:
6146 objc-methodprotolist objc-methodproto
6147 objc-methodprotolist declaration
6148 objc-methodprotolist ;
6150 The declaration is a data definition, which may be missing
6151 declaration specifiers under the same rules and diagnostics as
6152 other data definitions outside functions, and the stray semicolon
6153 is diagnosed the same way as a stray semicolon outside a
6157 c_parser_objc_methodprotolist (c_parser *parser)
6161 /* The list is terminated by @end. */
6162 switch (c_parser_peek_token (parser)->type)
6165 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
6166 "ISO C does not allow extra %<;%> outside of a function");
6167 c_parser_consume_token (parser);
6171 c_parser_objc_methodproto (parser);
6174 c_parser_pragma (parser, pragma_external);
6179 if (c_parser_next_token_is_keyword (parser, RID_AT_END))
6181 c_parser_declaration_or_fndef (parser, false, true, false, true);
6187 /* Parse an objc-methodproto.
6190 objc-method-type objc-method-decl ;
6194 c_parser_objc_methodproto (c_parser *parser)
6196 enum tree_code type = c_parser_objc_method_type (parser);
6198 objc_set_method_type (type);
6199 /* Remember protocol qualifiers in prototypes. */
6200 parser->objc_pq_context = true;
6201 decl = c_parser_objc_method_decl (parser);
6202 /* Forget protocol qualifiers here. */
6203 parser->objc_pq_context = false;
6204 objc_add_method_declaration (decl);
6205 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
6208 /* Parse an objc-method-decl.
6211 ( objc-type-name ) objc-selector
6213 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6214 objc-keyword-selector objc-optparmlist
6216 objc-keyword-selector:
6218 objc-keyword-selector objc-keyword-decl
6221 objc-selector : ( objc-type-name ) identifier
6222 objc-selector : identifier
6223 : ( objc-type-name ) identifier
6227 objc-optparms objc-optellipsis
6231 objc-opt-parms , parameter-declaration
6239 c_parser_objc_method_decl (c_parser *parser)
6241 tree type = NULL_TREE;
6243 tree parms = NULL_TREE;
6244 bool ellipsis = false;
6246 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6248 c_parser_consume_token (parser);
6249 type = c_parser_objc_type_name (parser);
6250 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6252 sel = c_parser_objc_selector (parser);
6253 /* If there is no selector, or a colon follows, we have an
6254 objc-keyword-selector. If there is a selector, and a colon does
6255 not follow, that selector ends the objc-method-decl. */
6256 if (!sel || c_parser_next_token_is (parser, CPP_COLON))
6259 tree list = NULL_TREE;
6262 tree atype = NULL_TREE, id, keyworddecl;
6263 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6265 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6267 c_parser_consume_token (parser);
6268 atype = c_parser_objc_type_name (parser);
6269 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6272 if (c_parser_next_token_is_not (parser, CPP_NAME))
6274 c_parser_error (parser, "expected identifier");
6275 return error_mark_node;
6277 id = c_parser_peek_token (parser)->value;
6278 c_parser_consume_token (parser);
6279 keyworddecl = objc_build_keyword_decl (tsel, atype, id);
6280 list = chainon (list, keyworddecl);
6281 tsel = c_parser_objc_selector (parser);
6282 if (!tsel && c_parser_next_token_is_not (parser, CPP_COLON))
6285 /* Parse the optional parameter list. Optional Objective-C
6286 method parameters follow the C syntax, and may include '...'
6287 to denote a variable number of arguments. */
6288 parms = make_node (TREE_LIST);
6289 while (c_parser_next_token_is (parser, CPP_COMMA))
6291 struct c_parm *parm;
6292 c_parser_consume_token (parser);
6293 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
6296 c_parser_consume_token (parser);
6299 parm = c_parser_parameter_declaration (parser, NULL_TREE);
6302 parms = chainon (parms,
6303 build_tree_list (NULL_TREE, grokparm (parm)));
6307 return objc_build_method_signature (type, sel, parms, ellipsis);
6310 /* Parse an objc-type-name.
6313 objc-type-qualifiers[opt] type-name
6314 objc-type-qualifiers[opt]
6316 objc-type-qualifiers:
6318 objc-type-qualifiers objc-type-qualifier
6320 objc-type-qualifier: one of
6321 in out inout bycopy byref oneway
6325 c_parser_objc_type_name (c_parser *parser)
6327 tree quals = NULL_TREE;
6328 struct c_type_name *type_name = NULL;
6329 tree type = NULL_TREE;
6332 c_token *token = c_parser_peek_token (parser);
6333 if (token->type == CPP_KEYWORD
6334 && (token->keyword == RID_IN
6335 || token->keyword == RID_OUT
6336 || token->keyword == RID_INOUT
6337 || token->keyword == RID_BYCOPY
6338 || token->keyword == RID_BYREF
6339 || token->keyword == RID_ONEWAY))
6341 quals = chainon (quals, build_tree_list (NULL_TREE, token->value));
6342 c_parser_consume_token (parser);
6347 if (c_parser_next_token_starts_typename (parser))
6348 type_name = c_parser_type_name (parser);
6350 type = groktypename (type_name, NULL, NULL);
6351 return build_tree_list (quals, type);
6354 /* Parse objc-protocol-refs.
6361 c_parser_objc_protocol_refs (c_parser *parser)
6363 tree list = NULL_TREE;
6364 gcc_assert (c_parser_next_token_is (parser, CPP_LESS));
6365 c_parser_consume_token (parser);
6366 /* Any identifiers, including those declared as type names, are OK
6371 if (c_parser_next_token_is_not (parser, CPP_NAME))
6373 c_parser_error (parser, "expected identifier");
6376 id = c_parser_peek_token (parser)->value;
6377 list = chainon (list, build_tree_list (NULL_TREE, id));
6378 c_parser_consume_token (parser);
6379 if (c_parser_next_token_is (parser, CPP_COMMA))
6380 c_parser_consume_token (parser);
6384 c_parser_require (parser, CPP_GREATER, "expected %<>%>");
6388 /* Parse an objc-try-catch-statement.
6390 objc-try-catch-statement:
6391 @try compound-statement objc-catch-list[opt]
6392 @try compound-statement objc-catch-list[opt] @finally compound-statement
6395 @catch ( parameter-declaration ) compound-statement
6396 objc-catch-list @catch ( parameter-declaration ) compound-statement
6400 c_parser_objc_try_catch_statement (c_parser *parser)
6404 gcc_assert (c_parser_next_token_is_keyword (parser, RID_TRY));
6405 c_parser_consume_token (parser);
6406 loc = c_parser_peek_token (parser)->location;
6407 stmt = c_parser_compound_statement (parser);
6408 objc_begin_try_stmt (loc, stmt);
6409 while (c_parser_next_token_is_keyword (parser, RID_CATCH))
6411 struct c_parm *parm;
6412 c_parser_consume_token (parser);
6413 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6415 parm = c_parser_parameter_declaration (parser, NULL_TREE);
6418 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6421 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6422 objc_begin_catch_clause (grokparm (parm));
6423 if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
6424 c_parser_compound_statement_nostart (parser);
6425 objc_finish_catch_clause ();
6427 if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY))
6431 c_parser_consume_token (parser);
6432 finloc = c_parser_peek_token (parser)->location;
6433 finstmt = c_parser_compound_statement (parser);
6434 objc_build_finally_clause (finloc, finstmt);
6436 objc_finish_try_stmt ();
6439 /* Parse an objc-synchronized-statement.
6441 objc-synchronized-statement:
6442 @synchronized ( expression ) compound-statement
6446 c_parser_objc_synchronized_statement (c_parser *parser)
6450 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED));
6451 c_parser_consume_token (parser);
6452 loc = c_parser_peek_token (parser)->location;
6453 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6455 expr = c_parser_expression (parser).value;
6456 expr = c_fully_fold (expr, false, NULL);
6457 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6460 expr = error_mark_node;
6461 stmt = c_parser_compound_statement (parser);
6462 objc_build_synchronized (loc, expr, stmt);
6465 /* Parse an objc-selector; return NULL_TREE without an error if the
6466 next token is not an objc-selector.
6471 enum struct union if else while do for switch case default
6472 break continue return goto asm sizeof typeof __alignof
6473 unsigned long const short volatile signed restrict _Complex
6474 in out inout bycopy byref oneway int char float double void _Bool
6476 ??? Why this selection of keywords but not, for example, storage
6477 class specifiers? */
6480 c_parser_objc_selector (c_parser *parser)
6482 c_token *token = c_parser_peek_token (parser);
6483 tree value = token->value;
6484 if (token->type == CPP_NAME)
6486 c_parser_consume_token (parser);
6489 if (token->type != CPP_KEYWORD)
6491 switch (token->keyword)
6532 c_parser_consume_token (parser);
6539 /* Parse an objc-selector-arg.
6543 objc-keywordname-list
6545 objc-keywordname-list:
6547 objc-keywordname-list objc-keywordname
6555 c_parser_objc_selector_arg (c_parser *parser)
6557 tree sel = c_parser_objc_selector (parser);
6558 tree list = NULL_TREE;
6559 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
6563 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6565 list = chainon (list, build_tree_list (sel, NULL_TREE));
6566 sel = c_parser_objc_selector (parser);
6567 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
6573 /* Parse an objc-receiver.
6582 c_parser_objc_receiver (c_parser *parser)
6584 if (c_parser_peek_token (parser)->type == CPP_NAME
6585 && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME
6586 || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME))
6588 tree id = c_parser_peek_token (parser)->value;
6589 c_parser_consume_token (parser);
6590 return objc_get_class_reference (id);
6592 return c_fully_fold (c_parser_expression (parser).value, false, NULL);
6595 /* Parse objc-message-args.
6599 objc-keywordarg-list
6601 objc-keywordarg-list:
6603 objc-keywordarg-list objc-keywordarg
6606 objc-selector : objc-keywordexpr
6611 c_parser_objc_message_args (c_parser *parser)
6613 tree sel = c_parser_objc_selector (parser);
6614 tree list = NULL_TREE;
6615 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
6620 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
6622 keywordexpr = c_parser_objc_keywordexpr (parser);
6623 list = chainon (list, build_tree_list (sel, keywordexpr));
6624 sel = c_parser_objc_selector (parser);
6625 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
6631 /* Parse an objc-keywordexpr.
6638 c_parser_objc_keywordexpr (c_parser *parser)
6640 tree list = c_parser_expr_list (parser, true, true);
6641 if (TREE_CHAIN (list) == NULL_TREE)
6643 /* Just return the expression, remove a level of
6645 return TREE_VALUE (list);
6649 /* We have a comma expression, we will collapse later. */
6655 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6656 should be considered, statements. ALLOW_STMT is true if we're within
6657 the context of a function and such pragmas are to be allowed. Returns
6658 true if we actually parsed such a pragma. */
6661 c_parser_pragma (c_parser *parser, enum pragma_context context)
6665 id = c_parser_peek_token (parser)->pragma_kind;
6666 gcc_assert (id != PRAGMA_NONE);
6670 case PRAGMA_OMP_BARRIER:
6671 if (context != pragma_compound)
6673 if (context == pragma_stmt)
6674 c_parser_error (parser, "%<#pragma omp barrier%> may only be "
6675 "used in compound statements");
6678 c_parser_omp_barrier (parser);
6681 case PRAGMA_OMP_FLUSH:
6682 if (context != pragma_compound)
6684 if (context == pragma_stmt)
6685 c_parser_error (parser, "%<#pragma omp flush%> may only be "
6686 "used in compound statements");
6689 c_parser_omp_flush (parser);
6692 case PRAGMA_OMP_TASKWAIT:
6693 if (context != pragma_compound)
6695 if (context == pragma_stmt)
6696 c_parser_error (parser, "%<#pragma omp taskwait%> may only be "
6697 "used in compound statements");
6700 c_parser_omp_taskwait (parser);
6703 case PRAGMA_OMP_THREADPRIVATE:
6704 c_parser_omp_threadprivate (parser);
6707 case PRAGMA_OMP_SECTION:
6708 error_at (c_parser_peek_token (parser)->location,
6709 "%<#pragma omp section%> may only be used in "
6710 "%<#pragma omp sections%> construct");
6711 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6714 case PRAGMA_GCC_PCH_PREPROCESS:
6715 c_parser_error (parser, "%<#pragma GCC pch_preprocess%> must be first");
6716 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6720 if (id < PRAGMA_FIRST_EXTERNAL)
6722 if (context == pragma_external)
6725 c_parser_error (parser, "expected declaration specifiers");
6726 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
6729 c_parser_omp_construct (parser);
6735 c_parser_consume_pragma (parser);
6736 c_invoke_pragma_handler (id);
6738 /* Skip to EOL, but suppress any error message. Those will have been
6739 generated by the handler routine through calling error, as opposed
6740 to calling c_parser_error. */
6741 parser->error = true;
6742 c_parser_skip_to_pragma_eol (parser);
6747 /* The interface the pragma parsers have to the lexer. */
6750 pragma_lex (tree *value)
6752 c_token *tok = c_parser_peek_token (the_parser);
6753 enum cpp_ttype ret = tok->type;
6755 *value = tok->value;
6756 if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF)
6760 if (ret == CPP_KEYWORD)
6762 c_parser_consume_token (the_parser);
6769 c_parser_pragma_pch_preprocess (c_parser *parser)
6773 c_parser_consume_pragma (parser);
6774 if (c_parser_next_token_is (parser, CPP_STRING))
6776 name = c_parser_peek_token (parser)->value;
6777 c_parser_consume_token (parser);
6780 c_parser_error (parser, "expected string literal");
6781 c_parser_skip_to_pragma_eol (parser);
6784 c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name));
6787 /* OpenMP 2.5 parsing routines. */
6789 /* Returns name of the next clause.
6790 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6791 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6792 returned and the token is consumed. */
6794 static pragma_omp_clause
6795 c_parser_omp_clause_name (c_parser *parser)
6797 pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE;
6799 if (c_parser_next_token_is_keyword (parser, RID_IF))
6800 result = PRAGMA_OMP_CLAUSE_IF;
6801 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
6802 result = PRAGMA_OMP_CLAUSE_DEFAULT;
6803 else if (c_parser_next_token_is (parser, CPP_NAME))
6805 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
6810 if (!strcmp ("collapse", p))
6811 result = PRAGMA_OMP_CLAUSE_COLLAPSE;
6812 else if (!strcmp ("copyin", p))
6813 result = PRAGMA_OMP_CLAUSE_COPYIN;
6814 else if (!strcmp ("copyprivate", p))
6815 result = PRAGMA_OMP_CLAUSE_COPYPRIVATE;
6818 if (!strcmp ("firstprivate", p))
6819 result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE;
6822 if (!strcmp ("lastprivate", p))
6823 result = PRAGMA_OMP_CLAUSE_LASTPRIVATE;
6826 if (!strcmp ("nowait", p))
6827 result = PRAGMA_OMP_CLAUSE_NOWAIT;
6828 else if (!strcmp ("num_threads", p))
6829 result = PRAGMA_OMP_CLAUSE_NUM_THREADS;
6832 if (!strcmp ("ordered", p))
6833 result = PRAGMA_OMP_CLAUSE_ORDERED;
6836 if (!strcmp ("private", p))
6837 result = PRAGMA_OMP_CLAUSE_PRIVATE;
6840 if (!strcmp ("reduction", p))
6841 result = PRAGMA_OMP_CLAUSE_REDUCTION;
6844 if (!strcmp ("schedule", p))
6845 result = PRAGMA_OMP_CLAUSE_SCHEDULE;
6846 else if (!strcmp ("shared", p))
6847 result = PRAGMA_OMP_CLAUSE_SHARED;
6850 if (!strcmp ("untied", p))
6851 result = PRAGMA_OMP_CLAUSE_UNTIED;
6856 if (result != PRAGMA_OMP_CLAUSE_NONE)
6857 c_parser_consume_token (parser);
6862 /* Validate that a clause of the given type does not already exist. */
6865 check_no_duplicate_clause (tree clauses, enum omp_clause_code code,
6870 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
6871 if (OMP_CLAUSE_CODE (c) == code)
6873 error ("too many %qs clauses", name);
6881 variable-list , identifier
6883 If KIND is nonzero, create the appropriate node and install the decl
6884 in OMP_CLAUSE_DECL and add the node to the head of the list.
6886 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6887 return the list created. */
6890 c_parser_omp_variable_list (c_parser *parser, enum omp_clause_code kind,
6893 if (c_parser_next_token_is_not (parser, CPP_NAME)
6894 || c_parser_peek_token (parser)->id_kind != C_ID_ID)
6895 c_parser_error (parser, "expected identifier");
6897 while (c_parser_next_token_is (parser, CPP_NAME)
6898 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
6900 tree t = lookup_name (c_parser_peek_token (parser)->value);
6903 undeclared_variable (c_parser_peek_token (parser)->value,
6904 c_parser_peek_token (parser)->location);
6905 else if (t == error_mark_node)
6909 tree u = build_omp_clause (kind);
6910 OMP_CLAUSE_DECL (u) = t;
6911 OMP_CLAUSE_CHAIN (u) = list;
6915 list = tree_cons (t, NULL_TREE, list);
6917 c_parser_consume_token (parser);
6919 if (c_parser_next_token_is_not (parser, CPP_COMMA))
6922 c_parser_consume_token (parser);
6928 /* Similarly, but expect leading and trailing parenthesis. This is a very
6929 common case for omp clauses. */
6932 c_parser_omp_var_list_parens (c_parser *parser, enum omp_clause_code kind,
6935 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6937 list = c_parser_omp_variable_list (parser, kind, list);
6938 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6944 collapse ( constant-expression ) */
6947 c_parser_omp_clause_collapse (c_parser *parser, tree list)
6949 tree c, num = error_mark_node;
6953 check_no_duplicate_clause (list, OMP_CLAUSE_COLLAPSE, "collapse");
6955 loc = c_parser_peek_token (parser)->location;
6956 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6958 num = c_parser_expr_no_commas (parser, NULL).value;
6959 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6961 if (num == error_mark_node)
6963 if (!INTEGRAL_TYPE_P (TREE_TYPE (num))
6964 || !host_integerp (num, 0)
6965 || (n = tree_low_cst (num, 0)) <= 0
6969 "collapse argument needs positive constant integer expression");
6972 c = build_omp_clause (OMP_CLAUSE_COLLAPSE);
6973 OMP_CLAUSE_COLLAPSE_EXPR (c) = num;
6974 OMP_CLAUSE_CHAIN (c) = list;
6979 copyin ( variable-list ) */
6982 c_parser_omp_clause_copyin (c_parser *parser, tree list)
6984 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYIN, list);
6988 copyprivate ( variable-list ) */
6991 c_parser_omp_clause_copyprivate (c_parser *parser, tree list)
6993 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYPRIVATE, list);
6997 default ( shared | none ) */
7000 c_parser_omp_clause_default (c_parser *parser, tree list)
7002 enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED;
7005 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7007 if (c_parser_next_token_is (parser, CPP_NAME))
7009 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
7014 if (strcmp ("none", p) != 0)
7016 kind = OMP_CLAUSE_DEFAULT_NONE;
7020 if (strcmp ("shared", p) != 0)
7022 kind = OMP_CLAUSE_DEFAULT_SHARED;
7029 c_parser_consume_token (parser);
7034 c_parser_error (parser, "expected %<none%> or %<shared%>");
7036 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7038 if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED)
7041 check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default");
7042 c = build_omp_clause (OMP_CLAUSE_DEFAULT);
7043 OMP_CLAUSE_CHAIN (c) = list;
7044 OMP_CLAUSE_DEFAULT_KIND (c) = kind;
7050 firstprivate ( variable-list ) */
7053 c_parser_omp_clause_firstprivate (c_parser *parser, tree list)
7055 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_FIRSTPRIVATE, list);
7059 if ( expression ) */
7062 c_parser_omp_clause_if (c_parser *parser, tree list)
7064 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7066 tree t = c_parser_paren_condition (parser);
7069 check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if");
7071 c = build_omp_clause (OMP_CLAUSE_IF);
7072 OMP_CLAUSE_IF_EXPR (c) = t;
7073 OMP_CLAUSE_CHAIN (c) = list;
7077 c_parser_error (parser, "expected %<(%>");
7083 lastprivate ( variable-list ) */
7086 c_parser_omp_clause_lastprivate (c_parser *parser, tree list)
7088 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_LASTPRIVATE, list);
7095 c_parser_omp_clause_nowait (c_parser *parser ATTRIBUTE_UNUSED, tree list)
7099 check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait");
7101 c = build_omp_clause (OMP_CLAUSE_NOWAIT);
7102 OMP_CLAUSE_CHAIN (c) = list;
7107 num_threads ( expression ) */
7110 c_parser_omp_clause_num_threads (c_parser *parser, tree list)
7112 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7114 location_t expr_loc = c_parser_peek_token (parser)->location;
7115 tree c, t = c_parser_expression (parser).value;
7116 t = c_fully_fold (t, false, NULL);
7118 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7120 if (!INTEGRAL_TYPE_P (TREE_TYPE (t)))
7122 c_parser_error (parser, "expected integer expression");
7126 /* Attempt to statically determine when the number isn't positive. */
7127 c = fold_build2 (LE_EXPR, boolean_type_node, t,
7128 build_int_cst (TREE_TYPE (t), 0));
7129 if (c == boolean_true_node)
7131 warning_at (expr_loc, 0,
7132 "%<num_threads%> value must be positive");
7133 t = integer_one_node;
7136 check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads");
7138 c = build_omp_clause (OMP_CLAUSE_NUM_THREADS);
7139 OMP_CLAUSE_NUM_THREADS_EXPR (c) = t;
7140 OMP_CLAUSE_CHAIN (c) = list;
7151 c_parser_omp_clause_ordered (c_parser *parser ATTRIBUTE_UNUSED, tree list)
7155 check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered");
7157 c = build_omp_clause (OMP_CLAUSE_ORDERED);
7158 OMP_CLAUSE_CHAIN (c) = list;
7163 private ( variable-list ) */
7166 c_parser_omp_clause_private (c_parser *parser, tree list)
7168 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_PRIVATE, list);
7172 reduction ( reduction-operator : variable-list )
7175 One of: + * - & ^ | && || */
7178 c_parser_omp_clause_reduction (c_parser *parser, tree list)
7180 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7182 enum tree_code code;
7184 switch (c_parser_peek_token (parser)->type)
7196 code = BIT_AND_EXPR;
7199 code = BIT_XOR_EXPR;
7202 code = BIT_IOR_EXPR;
7205 code = TRUTH_ANDIF_EXPR;
7208 code = TRUTH_ORIF_EXPR;
7211 c_parser_error (parser,
7212 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
7213 "%<^%>, %<|%>, %<&&%>, or %<||%>");
7214 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
7217 c_parser_consume_token (parser);
7218 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
7222 nl = c_parser_omp_variable_list (parser, OMP_CLAUSE_REDUCTION, list);
7223 for (c = nl; c != list; c = OMP_CLAUSE_CHAIN (c))
7224 OMP_CLAUSE_REDUCTION_CODE (c) = code;
7228 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7234 schedule ( schedule-kind )
7235 schedule ( schedule-kind , expression )
7238 static | dynamic | guided | runtime | auto
7242 c_parser_omp_clause_schedule (c_parser *parser, tree list)
7246 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7249 c = build_omp_clause (OMP_CLAUSE_SCHEDULE);
7251 if (c_parser_next_token_is (parser, CPP_NAME))
7253 tree kind = c_parser_peek_token (parser)->value;
7254 const char *p = IDENTIFIER_POINTER (kind);
7259 if (strcmp ("dynamic", p) != 0)
7261 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC;
7265 if (strcmp ("guided", p) != 0)
7267 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED;
7271 if (strcmp ("runtime", p) != 0)
7273 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME;
7280 else if (c_parser_next_token_is_keyword (parser, RID_STATIC))
7281 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC;
7282 else if (c_parser_next_token_is_keyword (parser, RID_AUTO))
7283 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO;
7287 c_parser_consume_token (parser);
7288 if (c_parser_next_token_is (parser, CPP_COMMA))
7291 c_parser_consume_token (parser);
7293 here = c_parser_peek_token (parser)->location;
7294 t = c_parser_expr_no_commas (parser, NULL).value;
7295 t = c_fully_fold (t, false, NULL);
7297 if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME)
7298 error_at (here, "schedule %<runtime%> does not take "
7299 "a %<chunk_size%> parameter");
7300 else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_AUTO)
7302 "schedule %<auto%> does not take "
7303 "a %<chunk_size%> parameter");
7304 else if (TREE_CODE (TREE_TYPE (t)) == INTEGER_TYPE)
7305 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t;
7307 c_parser_error (parser, "expected integer expression");
7309 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7312 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
7313 "expected %<,%> or %<)%>");
7315 check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule");
7316 OMP_CLAUSE_CHAIN (c) = list;
7320 c_parser_error (parser, "invalid schedule kind");
7321 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
7326 shared ( variable-list ) */
7329 c_parser_omp_clause_shared (c_parser *parser, tree list)
7331 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_SHARED, list);
7338 c_parser_omp_clause_untied (c_parser *parser ATTRIBUTE_UNUSED, tree list)
7342 /* FIXME: Should we allow duplicates? */
7343 check_no_duplicate_clause (list, OMP_CLAUSE_UNTIED, "untied");
7345 c = build_omp_clause (OMP_CLAUSE_UNTIED);
7346 OMP_CLAUSE_CHAIN (c) = list;
7350 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7351 is a bitmask in MASK. Return the list of clauses found; the result
7352 of clause default goes in *pdefault. */
7355 c_parser_omp_all_clauses (c_parser *parser, unsigned int mask,
7358 tree clauses = NULL;
7361 while (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7364 pragma_omp_clause c_kind;
7366 tree prev = clauses;
7368 if (!first && c_parser_next_token_is (parser, CPP_COMMA))
7369 c_parser_consume_token (parser);
7372 here = c_parser_peek_token (parser)->location;
7373 c_kind = c_parser_omp_clause_name (parser);
7377 case PRAGMA_OMP_CLAUSE_COLLAPSE:
7378 clauses = c_parser_omp_clause_collapse (parser, clauses);
7379 c_name = "collapse";
7381 case PRAGMA_OMP_CLAUSE_COPYIN:
7382 clauses = c_parser_omp_clause_copyin (parser, clauses);
7385 case PRAGMA_OMP_CLAUSE_COPYPRIVATE:
7386 clauses = c_parser_omp_clause_copyprivate (parser, clauses);
7387 c_name = "copyprivate";
7389 case PRAGMA_OMP_CLAUSE_DEFAULT:
7390 clauses = c_parser_omp_clause_default (parser, clauses);
7393 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE:
7394 clauses = c_parser_omp_clause_firstprivate (parser, clauses);
7395 c_name = "firstprivate";
7397 case PRAGMA_OMP_CLAUSE_IF:
7398 clauses = c_parser_omp_clause_if (parser, clauses);
7401 case PRAGMA_OMP_CLAUSE_LASTPRIVATE:
7402 clauses = c_parser_omp_clause_lastprivate (parser, clauses);
7403 c_name = "lastprivate";
7405 case PRAGMA_OMP_CLAUSE_NOWAIT:
7406 clauses = c_parser_omp_clause_nowait (parser, clauses);
7409 case PRAGMA_OMP_CLAUSE_NUM_THREADS:
7410 clauses = c_parser_omp_clause_num_threads (parser, clauses);
7411 c_name = "num_threads";
7413 case PRAGMA_OMP_CLAUSE_ORDERED:
7414 clauses = c_parser_omp_clause_ordered (parser, clauses);
7417 case PRAGMA_OMP_CLAUSE_PRIVATE:
7418 clauses = c_parser_omp_clause_private (parser, clauses);
7421 case PRAGMA_OMP_CLAUSE_REDUCTION:
7422 clauses = c_parser_omp_clause_reduction (parser, clauses);
7423 c_name = "reduction";
7425 case PRAGMA_OMP_CLAUSE_SCHEDULE:
7426 clauses = c_parser_omp_clause_schedule (parser, clauses);
7427 c_name = "schedule";
7429 case PRAGMA_OMP_CLAUSE_SHARED:
7430 clauses = c_parser_omp_clause_shared (parser, clauses);
7433 case PRAGMA_OMP_CLAUSE_UNTIED:
7434 clauses = c_parser_omp_clause_untied (parser, clauses);
7438 c_parser_error (parser, "expected %<#pragma omp%> clause");
7442 if (((mask >> c_kind) & 1) == 0 && !parser->error)
7444 /* Remove the invalid clause(s) from the list to avoid
7445 confusing the rest of the compiler. */
7447 error_at (here, "%qs is not valid for %qs", c_name, where);
7452 c_parser_skip_to_pragma_eol (parser);
7454 return c_finish_omp_clauses (clauses);
7461 In practice, we're also interested in adding the statement to an
7462 outer node. So it is convenient if we work around the fact that
7463 c_parser_statement calls add_stmt. */
7466 c_parser_omp_structured_block (c_parser *parser)
7468 tree stmt = push_stmt_list ();
7469 c_parser_statement (parser);
7470 return pop_stmt_list (stmt);
7474 # pragma omp atomic new-line
7478 x binop= expr | x++ | ++x | x-- | --x
7480 +, *, -, /, &, ^, |, <<, >>
7482 where x is an lvalue expression with scalar type. */
7485 c_parser_omp_atomic (c_parser *parser)
7489 enum tree_code code;
7490 struct c_expr rhs_expr;
7492 c_parser_skip_to_pragma_eol (parser);
7494 lhs = c_parser_unary_expression (parser).value;
7495 lhs = c_fully_fold (lhs, false, NULL);
7496 switch (TREE_CODE (lhs))
7500 c_parser_skip_to_end_of_block_or_statement (parser);
7503 case PREINCREMENT_EXPR:
7504 case POSTINCREMENT_EXPR:
7505 lhs = TREE_OPERAND (lhs, 0);
7507 rhs = integer_one_node;
7510 case PREDECREMENT_EXPR:
7511 case POSTDECREMENT_EXPR:
7512 lhs = TREE_OPERAND (lhs, 0);
7514 rhs = integer_one_node;
7518 switch (c_parser_peek_token (parser)->type)
7524 code = TRUNC_DIV_EXPR;
7539 code = BIT_AND_EXPR;
7542 code = BIT_IOR_EXPR;
7545 code = BIT_XOR_EXPR;
7548 c_parser_error (parser,
7549 "invalid operator for %<#pragma omp atomic%>");
7553 c_parser_consume_token (parser);
7554 rhs_expr = c_parser_expression (parser);
7555 rhs_expr = default_function_array_conversion (rhs_expr);
7556 rhs = rhs_expr.value;
7557 rhs = c_fully_fold (rhs, false, NULL);
7560 stmt = c_finish_omp_atomic (code, lhs, rhs);
7561 if (stmt != error_mark_node)
7563 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7568 # pragma omp barrier new-line
7572 c_parser_omp_barrier (c_parser *parser)
7574 c_parser_consume_pragma (parser);
7575 c_parser_skip_to_pragma_eol (parser);
7577 c_finish_omp_barrier ();
7581 # pragma omp critical [(name)] new-line
7586 c_parser_omp_critical (c_parser *parser)
7588 tree stmt, name = NULL;
7590 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7592 c_parser_consume_token (parser);
7593 if (c_parser_next_token_is (parser, CPP_NAME))
7595 name = c_parser_peek_token (parser)->value;
7596 c_parser_consume_token (parser);
7597 c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7600 c_parser_error (parser, "expected identifier");
7602 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7603 c_parser_error (parser, "expected %<(%> or end of line");
7604 c_parser_skip_to_pragma_eol (parser);
7606 stmt = c_parser_omp_structured_block (parser);
7607 return c_finish_omp_critical (stmt, name);
7611 # pragma omp flush flush-vars[opt] new-line
7614 ( variable-list ) */
7617 c_parser_omp_flush (c_parser *parser)
7619 c_parser_consume_pragma (parser);
7620 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7621 c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL);
7622 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
7623 c_parser_error (parser, "expected %<(%> or end of line");
7624 c_parser_skip_to_pragma_eol (parser);
7626 c_finish_omp_flush ();
7629 /* Parse the restricted form of the for statement allowed by OpenMP.
7630 The real trick here is to determine the loop control variable early
7631 so that we can push a new decl if necessary to make it private. */
7634 c_parser_omp_for_loop (c_parser *parser, tree clauses, tree *par_clauses)
7636 tree decl, cond, incr, save_break, save_cont, body, init, stmt, cl;
7637 tree declv, condv, incrv, initv, for_block = NULL, ret = NULL;
7639 bool fail = false, open_brace_parsed = false;
7640 int i, collapse = 1, nbraces = 0;
7642 for (cl = clauses; cl; cl = OMP_CLAUSE_CHAIN (cl))
7643 if (OMP_CLAUSE_CODE (cl) == OMP_CLAUSE_COLLAPSE)
7644 collapse = tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl), 0);
7646 gcc_assert (collapse >= 1);
7648 declv = make_tree_vec (collapse);
7649 initv = make_tree_vec (collapse);
7650 condv = make_tree_vec (collapse);
7651 incrv = make_tree_vec (collapse);
7653 if (!c_parser_next_token_is_keyword (parser, RID_FOR))
7655 c_parser_error (parser, "for statement expected");
7658 loc = c_parser_peek_token (parser)->location;
7659 c_parser_consume_token (parser);
7661 for (i = 0; i < collapse; i++)
7665 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7668 /* Parse the initialization declaration or expression. */
7669 if (c_parser_next_token_starts_declspecs (parser))
7673 = tree_cons (NULL, c_begin_compound_stmt (true), for_block);
7674 c_parser_declaration_or_fndef (parser, true, true, true, true);
7675 decl = check_for_loop_decls ();
7678 if (DECL_INITIAL (decl) == error_mark_node)
7679 decl = error_mark_node;
7682 else if (c_parser_next_token_is (parser, CPP_NAME)
7683 && c_parser_peek_2nd_token (parser)->type == CPP_EQ)
7685 struct c_expr init_exp;
7686 location_t init_loc;
7688 decl = c_parser_postfix_expression (parser).value;
7690 c_parser_require (parser, CPP_EQ, "expected %<=%>");
7691 init_loc = c_parser_peek_token (parser)->location;
7693 init_exp = c_parser_expr_no_commas (parser, NULL);
7694 init_exp = default_function_array_conversion (init_exp);
7695 init = build_modify_expr (init_loc,
7696 decl, NOP_EXPR, init_exp.value);
7697 init = c_process_expr_stmt (init);
7699 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7704 c_parser_error (parser,
7705 "expected iteration declaration or initialization");
7706 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
7712 /* Parse the loop condition. */
7714 if (c_parser_next_token_is_not (parser, CPP_SEMICOLON))
7716 location_t cond_loc = c_parser_peek_token (parser)->location;
7717 struct c_expr cond_expr = c_parser_binary_expression (parser, NULL);
7719 cond = cond_expr.value;
7720 cond = c_objc_common_truthvalue_conversion (cond_loc, cond);
7721 cond = c_fully_fold (cond, false, NULL);
7722 switch (cond_expr.original_code)
7730 /* Can't be cond = error_mark_node, because we want to preserve
7731 the location until c_finish_omp_for. */
7732 cond = build1 (NOP_EXPR, boolean_type_node, error_mark_node);
7735 protected_set_expr_location (cond, cond_loc);
7737 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7739 /* Parse the increment expression. */
7741 if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN))
7743 location_t incr_loc = c_parser_peek_token (parser)->location;
7745 incr = c_process_expr_stmt (c_parser_expression (parser).value);
7746 protected_set_expr_location (incr, incr_loc);
7748 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7750 if (decl == NULL || decl == error_mark_node || init == error_mark_node)
7754 TREE_VEC_ELT (declv, i) = decl;
7755 TREE_VEC_ELT (initv, i) = init;
7756 TREE_VEC_ELT (condv, i) = cond;
7757 TREE_VEC_ELT (incrv, i) = incr;
7761 if (i == collapse - 1)
7764 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
7765 in between the collapsed for loops to be still considered perfectly
7766 nested. Hopefully the final version clarifies this.
7767 For now handle (multiple) {'s and empty statements. */
7770 if (c_parser_next_token_is_keyword (parser, RID_FOR))
7772 c_parser_consume_token (parser);
7775 else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
7777 c_parser_consume_token (parser);
7781 && c_parser_next_token_is (parser, CPP_SEMICOLON))
7782 c_parser_consume_token (parser);
7785 c_parser_error (parser, "not enough perfectly nested loops");
7788 open_brace_parsed = true;
7798 nbraces += bracecount;
7801 save_break = c_break_label;
7802 c_break_label = size_one_node;
7803 save_cont = c_cont_label;
7804 c_cont_label = NULL_TREE;
7805 body = push_stmt_list ();
7807 if (open_brace_parsed)
7809 stmt = c_begin_compound_stmt (true);
7810 c_parser_compound_statement_nostart (parser);
7811 add_stmt (c_end_compound_stmt (stmt, true));
7814 add_stmt (c_parser_c99_block_statement (parser));
7816 add_stmt (build1 (LABEL_EXPR, void_type_node, c_cont_label));
7818 body = pop_stmt_list (body);
7819 c_break_label = save_break;
7820 c_cont_label = save_cont;
7824 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7826 c_parser_consume_token (parser);
7829 else if (c_parser_next_token_is (parser, CPP_SEMICOLON))
7830 c_parser_consume_token (parser);
7833 c_parser_error (parser, "collapsed loops not perfectly nested");
7836 stmt = c_begin_compound_stmt (true);
7838 c_parser_compound_statement_nostart (parser);
7839 body = c_end_compound_stmt (stmt, true);
7846 /* Only bother calling c_finish_omp_for if we haven't already generated
7847 an error from the initialization parsing. */
7850 stmt = c_finish_omp_for (loc, declv, initv, condv, incrv, body, NULL);
7853 if (par_clauses != NULL)
7856 for (c = par_clauses; *c ; )
7857 if (OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_FIRSTPRIVATE
7858 && OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_LASTPRIVATE)
7859 c = &OMP_CLAUSE_CHAIN (*c);
7862 for (i = 0; i < collapse; i++)
7863 if (TREE_VEC_ELT (declv, i) == OMP_CLAUSE_DECL (*c))
7866 c = &OMP_CLAUSE_CHAIN (*c);
7867 else if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_FIRSTPRIVATE)
7870 "iteration variable %qD should not be firstprivate",
7871 OMP_CLAUSE_DECL (*c));
7872 *c = OMP_CLAUSE_CHAIN (*c);
7876 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
7877 change it to shared (decl) in
7878 OMP_PARALLEL_CLAUSES. */
7879 tree l = build_omp_clause (OMP_CLAUSE_LASTPRIVATE);
7880 OMP_CLAUSE_DECL (l) = OMP_CLAUSE_DECL (*c);
7881 OMP_CLAUSE_CHAIN (l) = clauses;
7883 OMP_CLAUSE_SET_CODE (*c, OMP_CLAUSE_SHARED);
7887 OMP_FOR_CLAUSES (stmt) = clauses;
7894 stmt = c_end_compound_stmt (TREE_VALUE (for_block), true);
7896 for_block = TREE_CHAIN (for_block);
7902 #pragma omp for for-clause[optseq] new-line
7906 #define OMP_FOR_CLAUSE_MASK \
7907 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7908 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7909 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7910 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7911 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7912 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7913 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
7914 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7917 c_parser_omp_for (c_parser *parser)
7919 tree block, clauses, ret;
7921 clauses = c_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK,
7924 block = c_begin_compound_stmt (true);
7925 ret = c_parser_omp_for_loop (parser, clauses, NULL);
7926 block = c_end_compound_stmt (block, true);
7933 # pragma omp master new-line
7938 c_parser_omp_master (c_parser *parser)
7940 c_parser_skip_to_pragma_eol (parser);
7941 return c_finish_omp_master (c_parser_omp_structured_block (parser));
7945 # pragma omp ordered new-line
7950 c_parser_omp_ordered (c_parser *parser)
7952 c_parser_skip_to_pragma_eol (parser);
7953 return c_finish_omp_ordered (c_parser_omp_structured_block (parser));
7959 { section-sequence }
7962 section-directive[opt] structured-block
7963 section-sequence section-directive structured-block */
7966 c_parser_omp_sections_scope (c_parser *parser)
7969 bool error_suppress = false;
7972 if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
7974 /* Avoid skipping until the end of the block. */
7975 parser->error = false;
7979 stmt = push_stmt_list ();
7981 loc = c_parser_peek_token (parser)->location;
7982 if (c_parser_peek_token (parser)->pragma_kind != PRAGMA_OMP_SECTION)
7984 substmt = push_stmt_list ();
7988 c_parser_statement (parser);
7990 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
7992 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
7994 if (c_parser_next_token_is (parser, CPP_EOF))
7998 substmt = pop_stmt_list (substmt);
7999 substmt = build1 (OMP_SECTION, void_type_node, substmt);
8000 SET_EXPR_LOCATION (substmt, loc);
8006 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
8008 if (c_parser_next_token_is (parser, CPP_EOF))
8011 loc = c_parser_peek_token (parser)->location;
8012 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
8014 c_parser_consume_pragma (parser);
8015 c_parser_skip_to_pragma_eol (parser);
8016 error_suppress = false;
8018 else if (!error_suppress)
8020 error_at (loc, "expected %<#pragma omp section%> or %<}%>");
8021 error_suppress = true;
8024 substmt = c_parser_omp_structured_block (parser);
8025 substmt = build1 (OMP_SECTION, void_type_node, substmt);
8026 SET_EXPR_LOCATION (substmt, loc);
8029 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE,
8030 "expected %<#pragma omp section%> or %<}%>");
8032 substmt = pop_stmt_list (stmt);
8034 stmt = make_node (OMP_SECTIONS);
8035 TREE_TYPE (stmt) = void_type_node;
8036 OMP_SECTIONS_BODY (stmt) = substmt;
8038 return add_stmt (stmt);
8042 # pragma omp sections sections-clause[optseq] newline
8046 #define OMP_SECTIONS_CLAUSE_MASK \
8047 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8048 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8049 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
8050 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
8051 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
8054 c_parser_omp_sections (c_parser *parser)
8056 tree block, clauses, ret;
8058 clauses = c_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK,
8059 "#pragma omp sections");
8061 block = c_begin_compound_stmt (true);
8062 ret = c_parser_omp_sections_scope (parser);
8064 OMP_SECTIONS_CLAUSES (ret) = clauses;
8065 block = c_end_compound_stmt (block, true);
8072 # pragma parallel parallel-clause new-line
8073 # pragma parallel for parallel-for-clause new-line
8074 # pragma parallel sections parallel-sections-clause new-line
8077 #define OMP_PARALLEL_CLAUSE_MASK \
8078 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8079 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8080 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8081 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8082 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
8083 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
8084 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
8085 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
8088 c_parser_omp_parallel (c_parser *parser)
8090 enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL;
8091 const char *p_name = "#pragma omp parallel";
8092 tree stmt, clauses, par_clause, ws_clause, block;
8093 unsigned int mask = OMP_PARALLEL_CLAUSE_MASK;
8095 if (c_parser_next_token_is_keyword (parser, RID_FOR))
8097 c_parser_consume_token (parser);
8098 p_kind = PRAGMA_OMP_PARALLEL_FOR;
8099 p_name = "#pragma omp parallel for";
8100 mask |= OMP_FOR_CLAUSE_MASK;
8101 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
8103 else if (c_parser_next_token_is (parser, CPP_NAME))
8105 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
8106 if (strcmp (p, "sections") == 0)
8108 c_parser_consume_token (parser);
8109 p_kind = PRAGMA_OMP_PARALLEL_SECTIONS;
8110 p_name = "#pragma omp parallel sections";
8111 mask |= OMP_SECTIONS_CLAUSE_MASK;
8112 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
8116 clauses = c_parser_omp_all_clauses (parser, mask, p_name);
8120 case PRAGMA_OMP_PARALLEL:
8121 block = c_begin_omp_parallel ();
8122 c_parser_statement (parser);
8123 stmt = c_finish_omp_parallel (clauses, block);
8126 case PRAGMA_OMP_PARALLEL_FOR:
8127 block = c_begin_omp_parallel ();
8128 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
8129 c_parser_omp_for_loop (parser, ws_clause, &par_clause);
8130 stmt = c_finish_omp_parallel (par_clause, block);
8131 OMP_PARALLEL_COMBINED (stmt) = 1;
8134 case PRAGMA_OMP_PARALLEL_SECTIONS:
8135 block = c_begin_omp_parallel ();
8136 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
8137 stmt = c_parser_omp_sections_scope (parser);
8139 OMP_SECTIONS_CLAUSES (stmt) = ws_clause;
8140 stmt = c_finish_omp_parallel (par_clause, block);
8141 OMP_PARALLEL_COMBINED (stmt) = 1;
8152 # pragma omp single single-clause[optseq] new-line
8156 #define OMP_SINGLE_CLAUSE_MASK \
8157 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8158 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8159 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
8160 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
8163 c_parser_omp_single (c_parser *parser)
8165 tree stmt = make_node (OMP_SINGLE);
8166 TREE_TYPE (stmt) = void_type_node;
8168 OMP_SINGLE_CLAUSES (stmt)
8169 = c_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK,
8170 "#pragma omp single");
8171 OMP_SINGLE_BODY (stmt) = c_parser_omp_structured_block (parser);
8173 return add_stmt (stmt);
8177 # pragma omp task task-clause[optseq] new-line
8180 #define OMP_TASK_CLAUSE_MASK \
8181 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8182 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
8183 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8184 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8185 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8186 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
8189 c_parser_omp_task (c_parser *parser)
8191 tree clauses, block;
8193 clauses = c_parser_omp_all_clauses (parser, OMP_TASK_CLAUSE_MASK,
8194 "#pragma omp task");
8196 block = c_begin_omp_task ();
8197 c_parser_statement (parser);
8198 return c_finish_omp_task (clauses, block);
8202 # pragma omp taskwait new-line
8206 c_parser_omp_taskwait (c_parser *parser)
8208 c_parser_consume_pragma (parser);
8209 c_parser_skip_to_pragma_eol (parser);
8211 c_finish_omp_taskwait ();
8214 /* Main entry point to parsing most OpenMP pragmas. */
8217 c_parser_omp_construct (c_parser *parser)
8219 enum pragma_kind p_kind;
8223 loc = c_parser_peek_token (parser)->location;
8224 p_kind = c_parser_peek_token (parser)->pragma_kind;
8225 c_parser_consume_pragma (parser);
8227 /* For all constructs below except #pragma omp atomic
8228 MUST_NOT_THROW catch handlers are needed when exceptions
8230 if (p_kind != PRAGMA_OMP_ATOMIC)
8231 c_maybe_initialize_eh ();
8235 case PRAGMA_OMP_ATOMIC:
8236 c_parser_omp_atomic (parser);
8238 case PRAGMA_OMP_CRITICAL:
8239 stmt = c_parser_omp_critical (parser);
8241 case PRAGMA_OMP_FOR:
8242 stmt = c_parser_omp_for (parser);
8244 case PRAGMA_OMP_MASTER:
8245 stmt = c_parser_omp_master (parser);
8247 case PRAGMA_OMP_ORDERED:
8248 stmt = c_parser_omp_ordered (parser);
8250 case PRAGMA_OMP_PARALLEL:
8251 stmt = c_parser_omp_parallel (parser);
8253 case PRAGMA_OMP_SECTIONS:
8254 stmt = c_parser_omp_sections (parser);
8256 case PRAGMA_OMP_SINGLE:
8257 stmt = c_parser_omp_single (parser);
8259 case PRAGMA_OMP_TASK:
8260 stmt = c_parser_omp_task (parser);
8267 SET_EXPR_LOCATION (stmt, loc);
8272 # pragma omp threadprivate (variable-list) */
8275 c_parser_omp_threadprivate (c_parser *parser)
8279 c_parser_consume_pragma (parser);
8280 vars = c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL);
8282 /* Mark every variable in VARS to be assigned thread local storage. */
8283 for (t = vars; t; t = TREE_CHAIN (t))
8285 tree v = TREE_PURPOSE (t);
8287 /* If V had already been marked threadprivate, it doesn't matter
8288 whether it had been used prior to this point. */
8289 if (TREE_CODE (v) != VAR_DECL)
8290 error ("%qD is not a variable", v);
8291 else if (TREE_USED (v) && !C_DECL_THREADPRIVATE_P (v))
8292 error ("%qE declared %<threadprivate%> after first use", v);
8293 else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v))
8294 error ("automatic variable %qE cannot be %<threadprivate%>", v);
8295 else if (TREE_TYPE (v) == error_mark_node)
8297 else if (! COMPLETE_TYPE_P (TREE_TYPE (v)))
8298 error ("%<threadprivate%> %qE has incomplete type", v);
8301 if (! DECL_THREAD_LOCAL_P (v))
8303 DECL_TLS_MODEL (v) = decl_default_tls_model (v);
8304 /* If rtl has been already set for this var, call
8305 make_decl_rtl once again, so that encode_section_info
8306 has a chance to look at the new decl flags. */
8307 if (DECL_RTL_SET_P (v))
8310 C_DECL_THREADPRIVATE_P (v) = 1;
8314 c_parser_skip_to_pragma_eol (parser);
8318 /* Parse a single source file. */
8323 /* Use local storage to begin. If the first token is a pragma, parse it.
8324 If it is #pragma GCC pch_preprocess, then this will load a PCH file
8325 which will cause garbage collection. */
8328 memset (&tparser, 0, sizeof tparser);
8329 the_parser = &tparser;
8331 if (c_parser_peek_token (&tparser)->pragma_kind == PRAGMA_GCC_PCH_PREPROCESS)
8332 c_parser_pragma_pch_preprocess (&tparser);
8334 the_parser = GGC_NEW (c_parser);
8335 *the_parser = tparser;
8337 c_parser_translation_unit (the_parser);
8341 #include "gt-c-parser.h"