2 Copyright (C) 2000, 2001, 2002, 2003, 2004,
3 2005, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
4 Written by Mark Mitchell <mark@codesourcery.com>.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
31 #include "c-family/c-pragma.h"
34 #include "diagnostic-core.h"
38 #include "c-family/c-common.h"
39 #include "c-family/c-objc.h"
41 #include "tree-pretty-print.h"
47 /* The cp_lexer_* routines mediate between the lexer proper (in libcpp
48 and c-lex.c) and the C++ parser. */
50 static cp_token eof_token =
52 CPP_EOF, RID_MAX, 0, PRAGMA_NONE, false, false, false, 0, { NULL }
55 /* The various kinds of non integral constant we encounter. */
56 typedef enum non_integral_constant {
58 /* floating-point literal */
62 /* %<__FUNCTION__%> */
64 /* %<__PRETTY_FUNCTION__%> */
72 /* %<typeid%> operator */
74 /* non-constant compound literals */
82 /* an array reference */
88 /* the address of a label */
102 /* calls to overloaded operators */
106 /* a comma operator */
108 /* a call to a constructor */
110 /* a transaction expression */
112 } non_integral_constant;
114 /* The various kinds of errors about name-lookup failing. */
115 typedef enum name_lookup_error {
120 /* is not a class or namespace */
122 /* is not a class, namespace, or enumeration */
126 /* The various kinds of required token */
127 typedef enum required_token {
129 RT_SEMICOLON, /* ';' */
130 RT_OPEN_PAREN, /* '(' */
131 RT_CLOSE_BRACE, /* '}' */
132 RT_OPEN_BRACE, /* '{' */
133 RT_CLOSE_SQUARE, /* ']' */
134 RT_OPEN_SQUARE, /* '[' */
138 RT_GREATER, /* '>' */
140 RT_ELLIPSIS, /* '...' */
144 RT_COLON_SCOPE, /* ':' or '::' */
145 RT_CLOSE_PAREN, /* ')' */
146 RT_COMMA_CLOSE_PAREN, /* ',' or ')' */
147 RT_PRAGMA_EOL, /* end of line */
148 RT_NAME, /* identifier */
150 /* The type is CPP_KEYWORD */
152 RT_DELETE, /* delete */
153 RT_RETURN, /* return */
154 RT_WHILE, /* while */
155 RT_EXTERN, /* extern */
156 RT_STATIC_ASSERT, /* static_assert */
157 RT_DECLTYPE, /* decltype */
158 RT_OPERATOR, /* operator */
159 RT_CLASS, /* class */
160 RT_TEMPLATE, /* template */
161 RT_NAMESPACE, /* namespace */
162 RT_USING, /* using */
165 RT_CATCH, /* catch */
166 RT_THROW, /* throw */
167 RT_LABEL, /* __label__ */
168 RT_AT_TRY, /* @try */
169 RT_AT_SYNCHRONIZED, /* @synchronized */
170 RT_AT_THROW, /* @throw */
172 RT_SELECT, /* selection-statement */
173 RT_INTERATION, /* iteration-statement */
174 RT_JUMP, /* jump-statement */
175 RT_CLASS_KEY, /* class-key */
176 RT_CLASS_TYPENAME_TEMPLATE, /* class, typename, or template */
177 RT_TRANSACTION_ATOMIC, /* __transaction_atomic */
178 RT_TRANSACTION_RELAXED, /* __transaction_relaxed */
179 RT_TRANSACTION_CANCEL /* __transaction_cancel */
184 static cp_lexer *cp_lexer_new_main
186 static cp_lexer *cp_lexer_new_from_tokens
187 (cp_token_cache *tokens);
188 static void cp_lexer_destroy
190 static int cp_lexer_saving_tokens
192 static cp_token *cp_lexer_token_at
193 (cp_lexer *, cp_token_position);
194 static void cp_lexer_get_preprocessor_token
195 (cp_lexer *, cp_token *);
196 static inline cp_token *cp_lexer_peek_token
198 static cp_token *cp_lexer_peek_nth_token
199 (cp_lexer *, size_t);
200 static inline bool cp_lexer_next_token_is
201 (cp_lexer *, enum cpp_ttype);
202 static bool cp_lexer_next_token_is_not
203 (cp_lexer *, enum cpp_ttype);
204 static bool cp_lexer_next_token_is_keyword
205 (cp_lexer *, enum rid);
206 static cp_token *cp_lexer_consume_token
208 static void cp_lexer_purge_token
210 static void cp_lexer_purge_tokens_after
211 (cp_lexer *, cp_token_position);
212 static void cp_lexer_save_tokens
214 static void cp_lexer_commit_tokens
216 static void cp_lexer_rollback_tokens
218 static void cp_lexer_print_token
219 (FILE *, cp_token *);
220 static inline bool cp_lexer_debugging_p
222 static void cp_lexer_start_debugging
223 (cp_lexer *) ATTRIBUTE_UNUSED;
224 static void cp_lexer_stop_debugging
225 (cp_lexer *) ATTRIBUTE_UNUSED;
227 static cp_token_cache *cp_token_cache_new
228 (cp_token *, cp_token *);
230 static void cp_parser_initial_pragma
233 static tree cp_literal_operator_id
236 /* Manifest constants. */
237 #define CP_LEXER_BUFFER_SIZE ((256 * 1024) / sizeof (cp_token))
238 #define CP_SAVED_TOKEN_STACK 5
242 /* The stream to which debugging output should be written. */
243 static FILE *cp_lexer_debug_stream;
245 /* Nonzero if we are parsing an unevaluated operand: an operand to
246 sizeof, typeof, or alignof. */
247 int cp_unevaluated_operand;
249 /* Dump up to NUM tokens in BUFFER to FILE starting with token
250 START_TOKEN. If START_TOKEN is NULL, the dump starts with the
251 first token in BUFFER. If NUM is 0, dump all the tokens. If
252 CURR_TOKEN is set and it is one of the tokens in BUFFER, it will be
253 highlighted by surrounding it in [[ ]]. */
256 cp_lexer_dump_tokens (FILE *file, VEC(cp_token,gc) *buffer,
257 cp_token *start_token, unsigned num,
258 cp_token *curr_token)
260 unsigned i, nprinted;
264 fprintf (file, "%u tokens\n", VEC_length (cp_token, buffer));
270 num = VEC_length (cp_token, buffer);
272 if (start_token == NULL)
273 start_token = VEC_address (cp_token, buffer);
275 if (start_token > VEC_address (cp_token, buffer))
277 cp_lexer_print_token (file, VEC_index (cp_token, buffer, 0));
278 fprintf (file, " ... ");
283 for (i = 0; VEC_iterate (cp_token, buffer, i, token) && nprinted < num; i++)
285 if (token == start_token)
292 if (token == curr_token)
293 fprintf (file, "[[");
295 cp_lexer_print_token (file, token);
297 if (token == curr_token)
298 fprintf (file, "]]");
304 case CPP_CLOSE_BRACE:
314 if (i == num && i < VEC_length (cp_token, buffer))
316 fprintf (file, " ... ");
317 cp_lexer_print_token (file, VEC_index (cp_token, buffer,
318 VEC_length (cp_token, buffer) - 1));
321 fprintf (file, "\n");
325 /* Dump all tokens in BUFFER to stderr. */
328 cp_lexer_debug_tokens (VEC(cp_token,gc) *buffer)
330 cp_lexer_dump_tokens (stderr, buffer, NULL, 0, NULL);
334 /* Dump the cp_parser tree field T to FILE if T is non-NULL. DESC is the
335 description for T. */
338 cp_debug_print_tree_if_set (FILE *file, const char *desc, tree t)
342 fprintf (file, "%s: ", desc);
343 print_node_brief (file, "", t, 0);
348 /* Dump parser context C to FILE. */
351 cp_debug_print_context (FILE *file, cp_parser_context *c)
353 const char *status_s[] = { "OK", "ERROR", "COMMITTED" };
354 fprintf (file, "{ status = %s, scope = ", status_s[c->status]);
355 print_node_brief (file, "", c->object_type, 0);
356 fprintf (file, "}\n");
360 /* Print the stack of parsing contexts to FILE starting with FIRST. */
363 cp_debug_print_context_stack (FILE *file, cp_parser_context *first)
366 cp_parser_context *c;
368 fprintf (file, "Parsing context stack:\n");
369 for (i = 0, c = first; c; c = c->next, i++)
371 fprintf (file, "\t#%u: ", i);
372 cp_debug_print_context (file, c);
377 /* Print the value of FLAG to FILE. DESC is a string describing the flag. */
380 cp_debug_print_flag (FILE *file, const char *desc, bool flag)
383 fprintf (file, "%s: true\n", desc);
387 /* Print an unparsed function entry UF to FILE. */
390 cp_debug_print_unparsed_function (FILE *file, cp_unparsed_functions_entry *uf)
393 cp_default_arg_entry *default_arg_fn;
396 fprintf (file, "\tFunctions with default args:\n");
398 VEC_iterate (cp_default_arg_entry, uf->funs_with_default_args, i,
402 fprintf (file, "\t\tClass type: ");
403 print_node_brief (file, "", default_arg_fn->class_type, 0);
404 fprintf (file, "\t\tDeclaration: ");
405 print_node_brief (file, "", default_arg_fn->decl, 0);
406 fprintf (file, "\n");
409 fprintf (file, "\n\tFunctions with definitions that require "
410 "post-processing\n\t\t");
411 for (i = 0; VEC_iterate (tree, uf->funs_with_definitions, i, fn); i++)
413 print_node_brief (file, "", fn, 0);
416 fprintf (file, "\n");
418 fprintf (file, "\n\tNon-static data members with initializers that require "
419 "post-processing\n\t\t");
420 for (i = 0; VEC_iterate (tree, uf->nsdmis, i, fn); i++)
422 print_node_brief (file, "", fn, 0);
425 fprintf (file, "\n");
429 /* Print the stack of unparsed member functions S to FILE. */
432 cp_debug_print_unparsed_queues (FILE *file,
433 VEC(cp_unparsed_functions_entry, gc) *s)
436 cp_unparsed_functions_entry *uf;
438 fprintf (file, "Unparsed functions\n");
439 for (i = 0; VEC_iterate (cp_unparsed_functions_entry, s, i, uf); i++)
441 fprintf (file, "#%u:\n", i);
442 cp_debug_print_unparsed_function (file, uf);
447 /* Dump the tokens in a window of size WINDOW_SIZE around the next_token for
448 the given PARSER. If FILE is NULL, the output is printed on stderr. */
451 cp_debug_parser_tokens (FILE *file, cp_parser *parser, int window_size)
453 cp_token *next_token, *first_token, *start_token;
458 next_token = parser->lexer->next_token;
459 first_token = VEC_address (cp_token, parser->lexer->buffer);
460 start_token = (next_token > first_token + window_size / 2)
461 ? next_token - window_size / 2
463 cp_lexer_dump_tokens (file, parser->lexer->buffer, start_token, window_size,
468 /* Dump debugging information for the given PARSER. If FILE is NULL,
469 the output is printed on stderr. */
472 cp_debug_parser (FILE *file, cp_parser *parser)
474 const size_t window_size = 20;
476 expanded_location eloc;
481 fprintf (file, "Parser state\n\n");
482 fprintf (file, "Number of tokens: %u\n",
483 VEC_length (cp_token, parser->lexer->buffer));
484 cp_debug_print_tree_if_set (file, "Lookup scope", parser->scope);
485 cp_debug_print_tree_if_set (file, "Object scope",
486 parser->object_scope);
487 cp_debug_print_tree_if_set (file, "Qualifying scope",
488 parser->qualifying_scope);
489 cp_debug_print_context_stack (file, parser->context);
490 cp_debug_print_flag (file, "Allow GNU extensions",
491 parser->allow_gnu_extensions_p);
492 cp_debug_print_flag (file, "'>' token is greater-than",
493 parser->greater_than_is_operator_p);
494 cp_debug_print_flag (file, "Default args allowed in current "
495 "parameter list", parser->default_arg_ok_p);
496 cp_debug_print_flag (file, "Parsing integral constant-expression",
497 parser->integral_constant_expression_p);
498 cp_debug_print_flag (file, "Allow non-constant expression in current "
499 "constant-expression",
500 parser->allow_non_integral_constant_expression_p);
501 cp_debug_print_flag (file, "Seen non-constant expression",
502 parser->non_integral_constant_expression_p);
503 cp_debug_print_flag (file, "Local names and 'this' forbidden in "
505 parser->local_variables_forbidden_p);
506 cp_debug_print_flag (file, "In unbraced linkage specification",
507 parser->in_unbraced_linkage_specification_p);
508 cp_debug_print_flag (file, "Parsing a declarator",
509 parser->in_declarator_p);
510 cp_debug_print_flag (file, "In template argument list",
511 parser->in_template_argument_list_p);
512 cp_debug_print_flag (file, "Parsing an iteration statement",
513 parser->in_statement & IN_ITERATION_STMT);
514 cp_debug_print_flag (file, "Parsing a switch statement",
515 parser->in_statement & IN_SWITCH_STMT);
516 cp_debug_print_flag (file, "Parsing a structured OpenMP block",
517 parser->in_statement & IN_OMP_BLOCK);
518 cp_debug_print_flag (file, "Parsing a an OpenMP loop",
519 parser->in_statement & IN_OMP_FOR);
520 cp_debug_print_flag (file, "Parsing an if statement",
521 parser->in_statement & IN_IF_STMT);
522 cp_debug_print_flag (file, "Parsing a type-id in an expression "
523 "context", parser->in_type_id_in_expr_p);
524 cp_debug_print_flag (file, "Declarations are implicitly extern \"C\"",
525 parser->implicit_extern_c);
526 cp_debug_print_flag (file, "String expressions should be translated "
527 "to execution character set",
528 parser->translate_strings_p);
529 cp_debug_print_flag (file, "Parsing function body outside of a "
530 "local class", parser->in_function_body);
531 cp_debug_print_flag (file, "Auto correct a colon to a scope operator",
532 parser->colon_corrects_to_scope_p);
533 if (parser->type_definition_forbidden_message)
534 fprintf (file, "Error message for forbidden type definitions: %s\n",
535 parser->type_definition_forbidden_message);
536 cp_debug_print_unparsed_queues (file, parser->unparsed_queues);
537 fprintf (file, "Number of class definitions in progress: %u\n",
538 parser->num_classes_being_defined);
539 fprintf (file, "Number of template parameter lists for the current "
540 "declaration: %u\n", parser->num_template_parameter_lists);
541 cp_debug_parser_tokens (file, parser, window_size);
542 token = parser->lexer->next_token;
543 fprintf (file, "Next token to parse:\n");
544 fprintf (file, "\tToken: ");
545 cp_lexer_print_token (file, token);
546 eloc = expand_location (token->location);
547 fprintf (file, "\n\tFile: %s\n", eloc.file);
548 fprintf (file, "\tLine: %d\n", eloc.line);
549 fprintf (file, "\tColumn: %d\n", eloc.column);
553 /* Allocate memory for a new lexer object and return it. */
556 cp_lexer_alloc (void)
560 c_common_no_more_pch ();
562 /* Allocate the memory. */
563 lexer = ggc_alloc_cleared_cp_lexer ();
565 /* Initially we are not debugging. */
566 lexer->debugging_p = false;
568 lexer->saved_tokens = VEC_alloc (cp_token_position, heap,
569 CP_SAVED_TOKEN_STACK);
571 /* Create the buffer. */
572 lexer->buffer = VEC_alloc (cp_token, gc, CP_LEXER_BUFFER_SIZE);
578 /* Create a new main C++ lexer, the lexer that gets tokens from the
582 cp_lexer_new_main (void)
587 /* It's possible that parsing the first pragma will load a PCH file,
588 which is a GC collection point. So we have to do that before
589 allocating any memory. */
590 cp_parser_initial_pragma (&token);
592 lexer = cp_lexer_alloc ();
594 /* Put the first token in the buffer. */
595 VEC_quick_push (cp_token, lexer->buffer, &token);
597 /* Get the remaining tokens from the preprocessor. */
598 while (token.type != CPP_EOF)
600 cp_lexer_get_preprocessor_token (lexer, &token);
601 VEC_safe_push (cp_token, gc, lexer->buffer, &token);
604 lexer->last_token = VEC_address (cp_token, lexer->buffer)
605 + VEC_length (cp_token, lexer->buffer)
607 lexer->next_token = VEC_length (cp_token, lexer->buffer)
608 ? VEC_address (cp_token, lexer->buffer)
611 /* Subsequent preprocessor diagnostics should use compiler
612 diagnostic functions to get the compiler source location. */
615 gcc_assert (!lexer->next_token->purged_p);
619 /* Create a new lexer whose token stream is primed with the tokens in
620 CACHE. When these tokens are exhausted, no new tokens will be read. */
623 cp_lexer_new_from_tokens (cp_token_cache *cache)
625 cp_token *first = cache->first;
626 cp_token *last = cache->last;
627 cp_lexer *lexer = ggc_alloc_cleared_cp_lexer ();
629 /* We do not own the buffer. */
630 lexer->buffer = NULL;
631 lexer->next_token = first == last ? &eof_token : first;
632 lexer->last_token = last;
634 lexer->saved_tokens = VEC_alloc (cp_token_position, heap,
635 CP_SAVED_TOKEN_STACK);
637 /* Initially we are not debugging. */
638 lexer->debugging_p = false;
640 gcc_assert (!lexer->next_token->purged_p);
644 /* Frees all resources associated with LEXER. */
647 cp_lexer_destroy (cp_lexer *lexer)
649 VEC_free (cp_token, gc, lexer->buffer);
650 VEC_free (cp_token_position, heap, lexer->saved_tokens);
654 /* Returns nonzero if debugging information should be output. */
657 cp_lexer_debugging_p (cp_lexer *lexer)
659 return lexer->debugging_p;
663 static inline cp_token_position
664 cp_lexer_token_position (cp_lexer *lexer, bool previous_p)
666 gcc_assert (!previous_p || lexer->next_token != &eof_token);
668 return lexer->next_token - previous_p;
671 static inline cp_token *
672 cp_lexer_token_at (cp_lexer *lexer ATTRIBUTE_UNUSED, cp_token_position pos)
678 cp_lexer_set_token_position (cp_lexer *lexer, cp_token_position pos)
680 lexer->next_token = cp_lexer_token_at (lexer, pos);
683 static inline cp_token_position
684 cp_lexer_previous_token_position (cp_lexer *lexer)
686 if (lexer->next_token == &eof_token)
687 return lexer->last_token - 1;
689 return cp_lexer_token_position (lexer, true);
692 static inline cp_token *
693 cp_lexer_previous_token (cp_lexer *lexer)
695 cp_token_position tp = cp_lexer_previous_token_position (lexer);
697 return cp_lexer_token_at (lexer, tp);
700 /* nonzero if we are presently saving tokens. */
703 cp_lexer_saving_tokens (const cp_lexer* lexer)
705 return VEC_length (cp_token_position, lexer->saved_tokens) != 0;
708 /* Store the next token from the preprocessor in *TOKEN. Return true
709 if we reach EOF. If LEXER is NULL, assume we are handling an
710 initial #pragma pch_preprocess, and thus want the lexer to return
711 processed strings. */
714 cp_lexer_get_preprocessor_token (cp_lexer *lexer, cp_token *token)
716 static int is_extern_c = 0;
718 /* Get a new token from the preprocessor. */
720 = c_lex_with_flags (&token->u.value, &token->location, &token->flags,
721 lexer == NULL ? 0 : C_LEX_STRING_NO_JOIN);
722 token->keyword = RID_MAX;
723 token->pragma_kind = PRAGMA_NONE;
724 token->purged_p = false;
726 /* On some systems, some header files are surrounded by an
727 implicit extern "C" block. Set a flag in the token if it
728 comes from such a header. */
729 is_extern_c += pending_lang_change;
730 pending_lang_change = 0;
731 token->implicit_extern_c = is_extern_c > 0;
733 /* Check to see if this token is a keyword. */
734 if (token->type == CPP_NAME)
736 if (C_IS_RESERVED_WORD (token->u.value))
738 /* Mark this token as a keyword. */
739 token->type = CPP_KEYWORD;
740 /* Record which keyword. */
741 token->keyword = C_RID_CODE (token->u.value);
745 if (warn_cxx0x_compat
746 && C_RID_CODE (token->u.value) >= RID_FIRST_CXX0X
747 && C_RID_CODE (token->u.value) <= RID_LAST_CXX0X)
749 /* Warn about the C++0x keyword (but still treat it as
751 warning (OPT_Wc__0x_compat,
752 "identifier %qE is a keyword in C++11",
755 /* Clear out the C_RID_CODE so we don't warn about this
756 particular identifier-turned-keyword again. */
757 C_SET_RID_CODE (token->u.value, RID_MAX);
760 token->ambiguous_p = false;
761 token->keyword = RID_MAX;
764 else if (token->type == CPP_AT_NAME)
766 /* This only happens in Objective-C++; it must be a keyword. */
767 token->type = CPP_KEYWORD;
768 switch (C_RID_CODE (token->u.value))
770 /* Replace 'class' with '@class', 'private' with '@private',
771 etc. This prevents confusion with the C++ keyword
772 'class', and makes the tokens consistent with other
773 Objective-C 'AT' keywords. For example '@class' is
774 reported as RID_AT_CLASS which is consistent with
775 '@synchronized', which is reported as
778 case RID_CLASS: token->keyword = RID_AT_CLASS; break;
779 case RID_PRIVATE: token->keyword = RID_AT_PRIVATE; break;
780 case RID_PROTECTED: token->keyword = RID_AT_PROTECTED; break;
781 case RID_PUBLIC: token->keyword = RID_AT_PUBLIC; break;
782 case RID_THROW: token->keyword = RID_AT_THROW; break;
783 case RID_TRY: token->keyword = RID_AT_TRY; break;
784 case RID_CATCH: token->keyword = RID_AT_CATCH; break;
785 default: token->keyword = C_RID_CODE (token->u.value);
788 else if (token->type == CPP_PRAGMA)
790 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
791 token->pragma_kind = ((enum pragma_kind)
792 TREE_INT_CST_LOW (token->u.value));
793 token->u.value = NULL_TREE;
797 /* Update the globals input_location and the input file stack from TOKEN. */
799 cp_lexer_set_source_position_from_token (cp_token *token)
801 if (token->type != CPP_EOF)
803 input_location = token->location;
807 /* Return a pointer to the next token in the token stream, but do not
810 static inline cp_token *
811 cp_lexer_peek_token (cp_lexer *lexer)
813 if (cp_lexer_debugging_p (lexer))
815 fputs ("cp_lexer: peeking at token: ", cp_lexer_debug_stream);
816 cp_lexer_print_token (cp_lexer_debug_stream, lexer->next_token);
817 putc ('\n', cp_lexer_debug_stream);
819 return lexer->next_token;
822 /* Return true if the next token has the indicated TYPE. */
825 cp_lexer_next_token_is (cp_lexer* lexer, enum cpp_ttype type)
827 return cp_lexer_peek_token (lexer)->type == type;
830 /* Return true if the next token does not have the indicated TYPE. */
833 cp_lexer_next_token_is_not (cp_lexer* lexer, enum cpp_ttype type)
835 return !cp_lexer_next_token_is (lexer, type);
838 /* Return true if the next token is the indicated KEYWORD. */
841 cp_lexer_next_token_is_keyword (cp_lexer* lexer, enum rid keyword)
843 return cp_lexer_peek_token (lexer)->keyword == keyword;
846 /* Return true if the next token is not the indicated KEYWORD. */
849 cp_lexer_next_token_is_not_keyword (cp_lexer* lexer, enum rid keyword)
851 return cp_lexer_peek_token (lexer)->keyword != keyword;
854 /* Return true if the next token is a keyword for a decl-specifier. */
857 cp_lexer_next_token_is_decl_specifier_keyword (cp_lexer *lexer)
861 token = cp_lexer_peek_token (lexer);
862 switch (token->keyword)
864 /* auto specifier: storage-class-specifier in C++,
865 simple-type-specifier in C++0x. */
867 /* Storage classes. */
873 /* Elaborated type specifiers. */
879 /* Simple type specifiers. */
894 /* GNU extensions. */
897 /* C++0x extensions. */
899 case RID_UNDERLYING_TYPE:
907 /* Returns TRUE iff the token T begins a decltype type. */
910 token_is_decltype (cp_token *t)
912 return (t->keyword == RID_DECLTYPE
913 || t->type == CPP_DECLTYPE);
916 /* Returns TRUE iff the next token begins a decltype type. */
919 cp_lexer_next_token_is_decltype (cp_lexer *lexer)
921 cp_token *t = cp_lexer_peek_token (lexer);
922 return token_is_decltype (t);
925 /* Return a pointer to the Nth token in the token stream. If N is 1,
926 then this is precisely equivalent to cp_lexer_peek_token (except
927 that it is not inline). One would like to disallow that case, but
928 there is one case (cp_parser_nth_token_starts_template_id) where
929 the caller passes a variable for N and it might be 1. */
932 cp_lexer_peek_nth_token (cp_lexer* lexer, size_t n)
936 /* N is 1-based, not zero-based. */
939 if (cp_lexer_debugging_p (lexer))
940 fprintf (cp_lexer_debug_stream,
941 "cp_lexer: peeking ahead %ld at token: ", (long)n);
944 token = lexer->next_token;
945 gcc_assert (!n || token != &eof_token);
949 if (token == lexer->last_token)
955 if (!token->purged_p)
959 if (cp_lexer_debugging_p (lexer))
961 cp_lexer_print_token (cp_lexer_debug_stream, token);
962 putc ('\n', cp_lexer_debug_stream);
968 /* Return the next token, and advance the lexer's next_token pointer
969 to point to the next non-purged token. */
972 cp_lexer_consume_token (cp_lexer* lexer)
974 cp_token *token = lexer->next_token;
976 gcc_assert (token != &eof_token);
977 gcc_assert (!lexer->in_pragma || token->type != CPP_PRAGMA_EOL);
982 if (lexer->next_token == lexer->last_token)
984 lexer->next_token = &eof_token;
989 while (lexer->next_token->purged_p);
991 cp_lexer_set_source_position_from_token (token);
993 /* Provide debugging output. */
994 if (cp_lexer_debugging_p (lexer))
996 fputs ("cp_lexer: consuming token: ", cp_lexer_debug_stream);
997 cp_lexer_print_token (cp_lexer_debug_stream, token);
998 putc ('\n', cp_lexer_debug_stream);
1004 /* Permanently remove the next token from the token stream, and
1005 advance the next_token pointer to refer to the next non-purged
1009 cp_lexer_purge_token (cp_lexer *lexer)
1011 cp_token *tok = lexer->next_token;
1013 gcc_assert (tok != &eof_token);
1014 tok->purged_p = true;
1015 tok->location = UNKNOWN_LOCATION;
1016 tok->u.value = NULL_TREE;
1017 tok->keyword = RID_MAX;
1022 if (tok == lexer->last_token)
1028 while (tok->purged_p);
1029 lexer->next_token = tok;
1032 /* Permanently remove all tokens after TOK, up to, but not
1033 including, the token that will be returned next by
1034 cp_lexer_peek_token. */
1037 cp_lexer_purge_tokens_after (cp_lexer *lexer, cp_token *tok)
1039 cp_token *peek = lexer->next_token;
1041 if (peek == &eof_token)
1042 peek = lexer->last_token;
1044 gcc_assert (tok < peek);
1046 for ( tok += 1; tok != peek; tok += 1)
1048 tok->purged_p = true;
1049 tok->location = UNKNOWN_LOCATION;
1050 tok->u.value = NULL_TREE;
1051 tok->keyword = RID_MAX;
1055 /* Begin saving tokens. All tokens consumed after this point will be
1059 cp_lexer_save_tokens (cp_lexer* lexer)
1061 /* Provide debugging output. */
1062 if (cp_lexer_debugging_p (lexer))
1063 fprintf (cp_lexer_debug_stream, "cp_lexer: saving tokens\n");
1065 VEC_safe_push (cp_token_position, heap,
1066 lexer->saved_tokens, lexer->next_token);
1069 /* Commit to the portion of the token stream most recently saved. */
1072 cp_lexer_commit_tokens (cp_lexer* lexer)
1074 /* Provide debugging output. */
1075 if (cp_lexer_debugging_p (lexer))
1076 fprintf (cp_lexer_debug_stream, "cp_lexer: committing tokens\n");
1078 VEC_pop (cp_token_position, lexer->saved_tokens);
1081 /* Return all tokens saved since the last call to cp_lexer_save_tokens
1082 to the token stream. Stop saving tokens. */
1085 cp_lexer_rollback_tokens (cp_lexer* lexer)
1087 /* Provide debugging output. */
1088 if (cp_lexer_debugging_p (lexer))
1089 fprintf (cp_lexer_debug_stream, "cp_lexer: restoring tokens\n");
1091 lexer->next_token = VEC_pop (cp_token_position, lexer->saved_tokens);
1094 /* Print a representation of the TOKEN on the STREAM. */
1097 cp_lexer_print_token (FILE * stream, cp_token *token)
1099 /* We don't use cpp_type2name here because the parser defines
1100 a few tokens of its own. */
1101 static const char *const token_names[] = {
1102 /* cpplib-defined token types */
1103 #define OP(e, s) #e,
1104 #define TK(e, s) #e,
1108 /* C++ parser token types - see "Manifest constants", above. */
1111 "NESTED_NAME_SPECIFIER",
1114 /* For some tokens, print the associated data. */
1115 switch (token->type)
1118 /* Some keywords have a value that is not an IDENTIFIER_NODE.
1119 For example, `struct' is mapped to an INTEGER_CST. */
1120 if (TREE_CODE (token->u.value) != IDENTIFIER_NODE)
1122 /* else fall through */
1124 fputs (IDENTIFIER_POINTER (token->u.value), stream);
1131 case CPP_UTF8STRING:
1132 fprintf (stream, " \"%s\"", TREE_STRING_POINTER (token->u.value));
1136 print_generic_expr (stream, token->u.value, 0);
1140 /* If we have a name for the token, print it out. Otherwise, we
1141 simply give the numeric code. */
1142 if (token->type < ARRAY_SIZE(token_names))
1143 fputs (token_names[token->type], stream);
1145 fprintf (stream, "[%d]", token->type);
1150 /* Start emitting debugging information. */
1153 cp_lexer_start_debugging (cp_lexer* lexer)
1155 lexer->debugging_p = true;
1156 cp_lexer_debug_stream = stderr;
1159 /* Stop emitting debugging information. */
1162 cp_lexer_stop_debugging (cp_lexer* lexer)
1164 lexer->debugging_p = false;
1165 cp_lexer_debug_stream = NULL;
1168 /* Create a new cp_token_cache, representing a range of tokens. */
1170 static cp_token_cache *
1171 cp_token_cache_new (cp_token *first, cp_token *last)
1173 cp_token_cache *cache = ggc_alloc_cp_token_cache ();
1174 cache->first = first;
1180 /* Decl-specifiers. */
1182 /* Set *DECL_SPECS to represent an empty decl-specifier-seq. */
1185 clear_decl_specs (cp_decl_specifier_seq *decl_specs)
1187 memset (decl_specs, 0, sizeof (cp_decl_specifier_seq));
1192 /* Nothing other than the parser should be creating declarators;
1193 declarators are a semi-syntactic representation of C++ entities.
1194 Other parts of the front end that need to create entities (like
1195 VAR_DECLs or FUNCTION_DECLs) should do that directly. */
1197 static cp_declarator *make_call_declarator
1198 (cp_declarator *, tree, cp_cv_quals, cp_virt_specifiers, tree, tree);
1199 static cp_declarator *make_array_declarator
1200 (cp_declarator *, tree);
1201 static cp_declarator *make_pointer_declarator
1202 (cp_cv_quals, cp_declarator *);
1203 static cp_declarator *make_reference_declarator
1204 (cp_cv_quals, cp_declarator *, bool);
1205 static cp_parameter_declarator *make_parameter_declarator
1206 (cp_decl_specifier_seq *, cp_declarator *, tree);
1207 static cp_declarator *make_ptrmem_declarator
1208 (cp_cv_quals, tree, cp_declarator *);
1210 /* An erroneous declarator. */
1211 static cp_declarator *cp_error_declarator;
1213 /* The obstack on which declarators and related data structures are
1215 static struct obstack declarator_obstack;
1217 /* Alloc BYTES from the declarator memory pool. */
1219 static inline void *
1220 alloc_declarator (size_t bytes)
1222 return obstack_alloc (&declarator_obstack, bytes);
1225 /* Allocate a declarator of the indicated KIND. Clear fields that are
1226 common to all declarators. */
1228 static cp_declarator *
1229 make_declarator (cp_declarator_kind kind)
1231 cp_declarator *declarator;
1233 declarator = (cp_declarator *) alloc_declarator (sizeof (cp_declarator));
1234 declarator->kind = kind;
1235 declarator->attributes = NULL_TREE;
1236 declarator->declarator = NULL;
1237 declarator->parameter_pack_p = false;
1238 declarator->id_loc = UNKNOWN_LOCATION;
1243 /* Make a declarator for a generalized identifier. If
1244 QUALIFYING_SCOPE is non-NULL, the identifier is
1245 QUALIFYING_SCOPE::UNQUALIFIED_NAME; otherwise, it is just
1246 UNQUALIFIED_NAME. SFK indicates the kind of special function this
1249 static cp_declarator *
1250 make_id_declarator (tree qualifying_scope, tree unqualified_name,
1251 special_function_kind sfk)
1253 cp_declarator *declarator;
1255 /* It is valid to write:
1257 class C { void f(); };
1261 The standard is not clear about whether `typedef const C D' is
1262 legal; as of 2002-09-15 the committee is considering that
1263 question. EDG 3.0 allows that syntax. Therefore, we do as
1265 if (qualifying_scope && TYPE_P (qualifying_scope))
1266 qualifying_scope = TYPE_MAIN_VARIANT (qualifying_scope);
1268 gcc_assert (TREE_CODE (unqualified_name) == IDENTIFIER_NODE
1269 || TREE_CODE (unqualified_name) == BIT_NOT_EXPR
1270 || TREE_CODE (unqualified_name) == TEMPLATE_ID_EXPR);
1272 declarator = make_declarator (cdk_id);
1273 declarator->u.id.qualifying_scope = qualifying_scope;
1274 declarator->u.id.unqualified_name = unqualified_name;
1275 declarator->u.id.sfk = sfk;
1280 /* Make a declarator for a pointer to TARGET. CV_QUALIFIERS is a list
1281 of modifiers such as const or volatile to apply to the pointer
1282 type, represented as identifiers. */
1285 make_pointer_declarator (cp_cv_quals cv_qualifiers, cp_declarator *target)
1287 cp_declarator *declarator;
1289 declarator = make_declarator (cdk_pointer);
1290 declarator->declarator = target;
1291 declarator->u.pointer.qualifiers = cv_qualifiers;
1292 declarator->u.pointer.class_type = NULL_TREE;
1295 declarator->id_loc = target->id_loc;
1296 declarator->parameter_pack_p = target->parameter_pack_p;
1297 target->parameter_pack_p = false;
1300 declarator->parameter_pack_p = false;
1305 /* Like make_pointer_declarator -- but for references. */
1308 make_reference_declarator (cp_cv_quals cv_qualifiers, cp_declarator *target,
1311 cp_declarator *declarator;
1313 declarator = make_declarator (cdk_reference);
1314 declarator->declarator = target;
1315 declarator->u.reference.qualifiers = cv_qualifiers;
1316 declarator->u.reference.rvalue_ref = rvalue_ref;
1319 declarator->id_loc = target->id_loc;
1320 declarator->parameter_pack_p = target->parameter_pack_p;
1321 target->parameter_pack_p = false;
1324 declarator->parameter_pack_p = false;
1329 /* Like make_pointer_declarator -- but for a pointer to a non-static
1330 member of CLASS_TYPE. */
1333 make_ptrmem_declarator (cp_cv_quals cv_qualifiers, tree class_type,
1334 cp_declarator *pointee)
1336 cp_declarator *declarator;
1338 declarator = make_declarator (cdk_ptrmem);
1339 declarator->declarator = pointee;
1340 declarator->u.pointer.qualifiers = cv_qualifiers;
1341 declarator->u.pointer.class_type = class_type;
1345 declarator->parameter_pack_p = pointee->parameter_pack_p;
1346 pointee->parameter_pack_p = false;
1349 declarator->parameter_pack_p = false;
1354 /* Make a declarator for the function given by TARGET, with the
1355 indicated PARMS. The CV_QUALIFIERS aply to the function, as in
1356 "const"-qualified member function. The EXCEPTION_SPECIFICATION
1357 indicates what exceptions can be thrown. */
1360 make_call_declarator (cp_declarator *target,
1362 cp_cv_quals cv_qualifiers,
1363 cp_virt_specifiers virt_specifiers,
1364 tree exception_specification,
1365 tree late_return_type)
1367 cp_declarator *declarator;
1369 declarator = make_declarator (cdk_function);
1370 declarator->declarator = target;
1371 declarator->u.function.parameters = parms;
1372 declarator->u.function.qualifiers = cv_qualifiers;
1373 declarator->u.function.virt_specifiers = virt_specifiers;
1374 declarator->u.function.exception_specification = exception_specification;
1375 declarator->u.function.late_return_type = late_return_type;
1378 declarator->id_loc = target->id_loc;
1379 declarator->parameter_pack_p = target->parameter_pack_p;
1380 target->parameter_pack_p = false;
1383 declarator->parameter_pack_p = false;
1388 /* Make a declarator for an array of BOUNDS elements, each of which is
1389 defined by ELEMENT. */
1392 make_array_declarator (cp_declarator *element, tree bounds)
1394 cp_declarator *declarator;
1396 declarator = make_declarator (cdk_array);
1397 declarator->declarator = element;
1398 declarator->u.array.bounds = bounds;
1401 declarator->id_loc = element->id_loc;
1402 declarator->parameter_pack_p = element->parameter_pack_p;
1403 element->parameter_pack_p = false;
1406 declarator->parameter_pack_p = false;
1411 /* Determine whether the declarator we've seen so far can be a
1412 parameter pack, when followed by an ellipsis. */
1414 declarator_can_be_parameter_pack (cp_declarator *declarator)
1416 /* Search for a declarator name, or any other declarator that goes
1417 after the point where the ellipsis could appear in a parameter
1418 pack. If we find any of these, then this declarator can not be
1419 made into a parameter pack. */
1421 while (declarator && !found)
1423 switch ((int)declarator->kind)
1434 declarator = declarator->declarator;
1442 cp_parameter_declarator *no_parameters;
1444 /* Create a parameter declarator with the indicated DECL_SPECIFIERS,
1445 DECLARATOR and DEFAULT_ARGUMENT. */
1447 cp_parameter_declarator *
1448 make_parameter_declarator (cp_decl_specifier_seq *decl_specifiers,
1449 cp_declarator *declarator,
1450 tree default_argument)
1452 cp_parameter_declarator *parameter;
1454 parameter = ((cp_parameter_declarator *)
1455 alloc_declarator (sizeof (cp_parameter_declarator)));
1456 parameter->next = NULL;
1457 if (decl_specifiers)
1458 parameter->decl_specifiers = *decl_specifiers;
1460 clear_decl_specs (¶meter->decl_specifiers);
1461 parameter->declarator = declarator;
1462 parameter->default_argument = default_argument;
1463 parameter->ellipsis_p = false;
1468 /* Returns true iff DECLARATOR is a declaration for a function. */
1471 function_declarator_p (const cp_declarator *declarator)
1475 if (declarator->kind == cdk_function
1476 && declarator->declarator->kind == cdk_id)
1478 if (declarator->kind == cdk_id
1479 || declarator->kind == cdk_error)
1481 declarator = declarator->declarator;
1491 A cp_parser parses the token stream as specified by the C++
1492 grammar. Its job is purely parsing, not semantic analysis. For
1493 example, the parser breaks the token stream into declarators,
1494 expressions, statements, and other similar syntactic constructs.
1495 It does not check that the types of the expressions on either side
1496 of an assignment-statement are compatible, or that a function is
1497 not declared with a parameter of type `void'.
1499 The parser invokes routines elsewhere in the compiler to perform
1500 semantic analysis and to build up the abstract syntax tree for the
1503 The parser (and the template instantiation code, which is, in a
1504 way, a close relative of parsing) are the only parts of the
1505 compiler that should be calling push_scope and pop_scope, or
1506 related functions. The parser (and template instantiation code)
1507 keeps track of what scope is presently active; everything else
1508 should simply honor that. (The code that generates static
1509 initializers may also need to set the scope, in order to check
1510 access control correctly when emitting the initializers.)
1515 The parser is of the standard recursive-descent variety. Upcoming
1516 tokens in the token stream are examined in order to determine which
1517 production to use when parsing a non-terminal. Some C++ constructs
1518 require arbitrary look ahead to disambiguate. For example, it is
1519 impossible, in the general case, to tell whether a statement is an
1520 expression or declaration without scanning the entire statement.
1521 Therefore, the parser is capable of "parsing tentatively." When the
1522 parser is not sure what construct comes next, it enters this mode.
1523 Then, while we attempt to parse the construct, the parser queues up
1524 error messages, rather than issuing them immediately, and saves the
1525 tokens it consumes. If the construct is parsed successfully, the
1526 parser "commits", i.e., it issues any queued error messages and
1527 the tokens that were being preserved are permanently discarded.
1528 If, however, the construct is not parsed successfully, the parser
1529 rolls back its state completely so that it can resume parsing using
1530 a different alternative.
1535 The performance of the parser could probably be improved substantially.
1536 We could often eliminate the need to parse tentatively by looking ahead
1537 a little bit. In some places, this approach might not entirely eliminate
1538 the need to parse tentatively, but it might still speed up the average
1541 /* Flags that are passed to some parsing functions. These values can
1542 be bitwise-ored together. */
1547 CP_PARSER_FLAGS_NONE = 0x0,
1548 /* The construct is optional. If it is not present, then no error
1549 should be issued. */
1550 CP_PARSER_FLAGS_OPTIONAL = 0x1,
1551 /* When parsing a type-specifier, treat user-defined type-names
1552 as non-type identifiers. */
1553 CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES = 0x2,
1554 /* When parsing a type-specifier, do not try to parse a class-specifier
1555 or enum-specifier. */
1556 CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS = 0x4,
1557 /* When parsing a decl-specifier-seq, only allow type-specifier or
1559 CP_PARSER_FLAGS_ONLY_TYPE_OR_CONSTEXPR = 0x8
1562 /* This type is used for parameters and variables which hold
1563 combinations of the above flags. */
1564 typedef int cp_parser_flags;
1566 /* The different kinds of declarators we want to parse. */
1568 typedef enum cp_parser_declarator_kind
1570 /* We want an abstract declarator. */
1571 CP_PARSER_DECLARATOR_ABSTRACT,
1572 /* We want a named declarator. */
1573 CP_PARSER_DECLARATOR_NAMED,
1574 /* We don't mind, but the name must be an unqualified-id. */
1575 CP_PARSER_DECLARATOR_EITHER
1576 } cp_parser_declarator_kind;
1578 /* The precedence values used to parse binary expressions. The minimum value
1579 of PREC must be 1, because zero is reserved to quickly discriminate
1580 binary operators from other tokens. */
1585 PREC_LOGICAL_OR_EXPRESSION,
1586 PREC_LOGICAL_AND_EXPRESSION,
1587 PREC_INCLUSIVE_OR_EXPRESSION,
1588 PREC_EXCLUSIVE_OR_EXPRESSION,
1589 PREC_AND_EXPRESSION,
1590 PREC_EQUALITY_EXPRESSION,
1591 PREC_RELATIONAL_EXPRESSION,
1592 PREC_SHIFT_EXPRESSION,
1593 PREC_ADDITIVE_EXPRESSION,
1594 PREC_MULTIPLICATIVE_EXPRESSION,
1596 NUM_PREC_VALUES = PREC_PM_EXPRESSION
1599 /* A mapping from a token type to a corresponding tree node type, with a
1600 precedence value. */
1602 typedef struct cp_parser_binary_operations_map_node
1604 /* The token type. */
1605 enum cpp_ttype token_type;
1606 /* The corresponding tree code. */
1607 enum tree_code tree_type;
1608 /* The precedence of this operator. */
1609 enum cp_parser_prec prec;
1610 } cp_parser_binary_operations_map_node;
1612 typedef struct cp_parser_expression_stack_entry
1614 /* Left hand side of the binary operation we are currently
1617 /* Original tree code for left hand side, if it was a binary
1618 expression itself (used for -Wparentheses). */
1619 enum tree_code lhs_type;
1620 /* Tree code for the binary operation we are parsing. */
1621 enum tree_code tree_type;
1622 /* Precedence of the binary operation we are parsing. */
1623 enum cp_parser_prec prec;
1624 } cp_parser_expression_stack_entry;
1626 /* The stack for storing partial expressions. We only need NUM_PREC_VALUES
1627 entries because precedence levels on the stack are monotonically
1629 typedef struct cp_parser_expression_stack_entry
1630 cp_parser_expression_stack[NUM_PREC_VALUES];
1634 /* Constructors and destructors. */
1636 static cp_parser_context *cp_parser_context_new
1637 (cp_parser_context *);
1639 /* Class variables. */
1641 static GTY((deletable)) cp_parser_context* cp_parser_context_free_list;
1643 /* The operator-precedence table used by cp_parser_binary_expression.
1644 Transformed into an associative array (binops_by_token) by
1647 static const cp_parser_binary_operations_map_node binops[] = {
1648 { CPP_DEREF_STAR, MEMBER_REF, PREC_PM_EXPRESSION },
1649 { CPP_DOT_STAR, DOTSTAR_EXPR, PREC_PM_EXPRESSION },
1651 { CPP_MULT, MULT_EXPR, PREC_MULTIPLICATIVE_EXPRESSION },
1652 { CPP_DIV, TRUNC_DIV_EXPR, PREC_MULTIPLICATIVE_EXPRESSION },
1653 { CPP_MOD, TRUNC_MOD_EXPR, PREC_MULTIPLICATIVE_EXPRESSION },
1655 { CPP_PLUS, PLUS_EXPR, PREC_ADDITIVE_EXPRESSION },
1656 { CPP_MINUS, MINUS_EXPR, PREC_ADDITIVE_EXPRESSION },
1658 { CPP_LSHIFT, LSHIFT_EXPR, PREC_SHIFT_EXPRESSION },
1659 { CPP_RSHIFT, RSHIFT_EXPR, PREC_SHIFT_EXPRESSION },
1661 { CPP_LESS, LT_EXPR, PREC_RELATIONAL_EXPRESSION },
1662 { CPP_GREATER, GT_EXPR, PREC_RELATIONAL_EXPRESSION },
1663 { CPP_LESS_EQ, LE_EXPR, PREC_RELATIONAL_EXPRESSION },
1664 { CPP_GREATER_EQ, GE_EXPR, PREC_RELATIONAL_EXPRESSION },
1666 { CPP_EQ_EQ, EQ_EXPR, PREC_EQUALITY_EXPRESSION },
1667 { CPP_NOT_EQ, NE_EXPR, PREC_EQUALITY_EXPRESSION },
1669 { CPP_AND, BIT_AND_EXPR, PREC_AND_EXPRESSION },
1671 { CPP_XOR, BIT_XOR_EXPR, PREC_EXCLUSIVE_OR_EXPRESSION },
1673 { CPP_OR, BIT_IOR_EXPR, PREC_INCLUSIVE_OR_EXPRESSION },
1675 { CPP_AND_AND, TRUTH_ANDIF_EXPR, PREC_LOGICAL_AND_EXPRESSION },
1677 { CPP_OR_OR, TRUTH_ORIF_EXPR, PREC_LOGICAL_OR_EXPRESSION }
1680 /* The same as binops, but initialized by cp_parser_new so that
1681 binops_by_token[N].token_type == N. Used in cp_parser_binary_expression
1683 static cp_parser_binary_operations_map_node binops_by_token[N_CP_TTYPES];
1685 /* Constructors and destructors. */
1687 /* Construct a new context. The context below this one on the stack
1688 is given by NEXT. */
1690 static cp_parser_context *
1691 cp_parser_context_new (cp_parser_context* next)
1693 cp_parser_context *context;
1695 /* Allocate the storage. */
1696 if (cp_parser_context_free_list != NULL)
1698 /* Pull the first entry from the free list. */
1699 context = cp_parser_context_free_list;
1700 cp_parser_context_free_list = context->next;
1701 memset (context, 0, sizeof (*context));
1704 context = ggc_alloc_cleared_cp_parser_context ();
1706 /* No errors have occurred yet in this context. */
1707 context->status = CP_PARSER_STATUS_KIND_NO_ERROR;
1708 /* If this is not the bottommost context, copy information that we
1709 need from the previous context. */
1712 /* If, in the NEXT context, we are parsing an `x->' or `x.'
1713 expression, then we are parsing one in this context, too. */
1714 context->object_type = next->object_type;
1715 /* Thread the stack. */
1716 context->next = next;
1722 /* Managing the unparsed function queues. */
1724 #define unparsed_funs_with_default_args \
1725 VEC_last (cp_unparsed_functions_entry, parser->unparsed_queues)->funs_with_default_args
1726 #define unparsed_funs_with_definitions \
1727 VEC_last (cp_unparsed_functions_entry, parser->unparsed_queues)->funs_with_definitions
1728 #define unparsed_nsdmis \
1729 VEC_last (cp_unparsed_functions_entry, parser->unparsed_queues)->nsdmis
1732 push_unparsed_function_queues (cp_parser *parser)
1734 VEC_safe_push (cp_unparsed_functions_entry, gc,
1735 parser->unparsed_queues, NULL);
1736 unparsed_funs_with_default_args = NULL;
1737 unparsed_funs_with_definitions = make_tree_vector ();
1738 unparsed_nsdmis = NULL;
1742 pop_unparsed_function_queues (cp_parser *parser)
1744 release_tree_vector (unparsed_funs_with_definitions);
1745 VEC_pop (cp_unparsed_functions_entry, parser->unparsed_queues);
1750 /* Constructors and destructors. */
1752 static cp_parser *cp_parser_new
1755 /* Routines to parse various constructs.
1757 Those that return `tree' will return the error_mark_node (rather
1758 than NULL_TREE) if a parse error occurs, unless otherwise noted.
1759 Sometimes, they will return an ordinary node if error-recovery was
1760 attempted, even though a parse error occurred. So, to check
1761 whether or not a parse error occurred, you should always use
1762 cp_parser_error_occurred. If the construct is optional (indicated
1763 either by an `_opt' in the name of the function that does the
1764 parsing or via a FLAGS parameter), then NULL_TREE is returned if
1765 the construct is not present. */
1767 /* Lexical conventions [gram.lex] */
1769 static tree cp_parser_identifier
1771 static tree cp_parser_string_literal
1772 (cp_parser *, bool, bool);
1773 static tree cp_parser_userdef_char_literal
1775 static tree cp_parser_userdef_string_literal
1777 static tree cp_parser_userdef_numeric_literal
1780 /* Basic concepts [gram.basic] */
1782 static bool cp_parser_translation_unit
1785 /* Expressions [gram.expr] */
1787 static tree cp_parser_primary_expression
1788 (cp_parser *, bool, bool, bool, cp_id_kind *);
1789 static tree cp_parser_id_expression
1790 (cp_parser *, bool, bool, bool *, bool, bool);
1791 static tree cp_parser_unqualified_id
1792 (cp_parser *, bool, bool, bool, bool);
1793 static tree cp_parser_nested_name_specifier_opt
1794 (cp_parser *, bool, bool, bool, bool);
1795 static tree cp_parser_nested_name_specifier
1796 (cp_parser *, bool, bool, bool, bool);
1797 static tree cp_parser_qualifying_entity
1798 (cp_parser *, bool, bool, bool, bool, bool);
1799 static tree cp_parser_postfix_expression
1800 (cp_parser *, bool, bool, bool, cp_id_kind *);
1801 static tree cp_parser_postfix_open_square_expression
1802 (cp_parser *, tree, bool);
1803 static tree cp_parser_postfix_dot_deref_expression
1804 (cp_parser *, enum cpp_ttype, tree, bool, cp_id_kind *, location_t);
1805 static VEC(tree,gc) *cp_parser_parenthesized_expression_list
1806 (cp_parser *, int, bool, bool, bool *);
1807 /* Values for the second parameter of cp_parser_parenthesized_expression_list. */
1808 enum { non_attr = 0, normal_attr = 1, id_attr = 2 };
1809 static void cp_parser_pseudo_destructor_name
1810 (cp_parser *, tree *, tree *);
1811 static tree cp_parser_unary_expression
1812 (cp_parser *, bool, bool, cp_id_kind *);
1813 static enum tree_code cp_parser_unary_operator
1815 static tree cp_parser_new_expression
1817 static VEC(tree,gc) *cp_parser_new_placement
1819 static tree cp_parser_new_type_id
1820 (cp_parser *, tree *);
1821 static cp_declarator *cp_parser_new_declarator_opt
1823 static cp_declarator *cp_parser_direct_new_declarator
1825 static VEC(tree,gc) *cp_parser_new_initializer
1827 static tree cp_parser_delete_expression
1829 static tree cp_parser_cast_expression
1830 (cp_parser *, bool, bool, cp_id_kind *);
1831 static tree cp_parser_binary_expression
1832 (cp_parser *, bool, bool, enum cp_parser_prec, cp_id_kind *);
1833 static tree cp_parser_question_colon_clause
1834 (cp_parser *, tree);
1835 static tree cp_parser_assignment_expression
1836 (cp_parser *, bool, cp_id_kind *);
1837 static enum tree_code cp_parser_assignment_operator_opt
1839 static tree cp_parser_expression
1840 (cp_parser *, bool, cp_id_kind *);
1841 static tree cp_parser_constant_expression
1842 (cp_parser *, bool, bool *);
1843 static tree cp_parser_builtin_offsetof
1845 static tree cp_parser_lambda_expression
1847 static void cp_parser_lambda_introducer
1848 (cp_parser *, tree);
1849 static bool cp_parser_lambda_declarator_opt
1850 (cp_parser *, tree);
1851 static void cp_parser_lambda_body
1852 (cp_parser *, tree);
1854 /* Statements [gram.stmt.stmt] */
1856 static void cp_parser_statement
1857 (cp_parser *, tree, bool, bool *);
1858 static void cp_parser_label_for_labeled_statement
1860 static tree cp_parser_expression_statement
1861 (cp_parser *, tree);
1862 static tree cp_parser_compound_statement
1863 (cp_parser *, tree, bool, bool);
1864 static void cp_parser_statement_seq_opt
1865 (cp_parser *, tree);
1866 static tree cp_parser_selection_statement
1867 (cp_parser *, bool *);
1868 static tree cp_parser_condition
1870 static tree cp_parser_iteration_statement
1872 static bool cp_parser_for_init_statement
1873 (cp_parser *, tree *decl);
1874 static tree cp_parser_for
1876 static tree cp_parser_c_for
1877 (cp_parser *, tree, tree);
1878 static tree cp_parser_range_for
1879 (cp_parser *, tree, tree, tree);
1880 static void do_range_for_auto_deduction
1882 static tree cp_parser_perform_range_for_lookup
1883 (tree, tree *, tree *);
1884 static tree cp_parser_range_for_member_function
1886 static tree cp_parser_jump_statement
1888 static void cp_parser_declaration_statement
1891 static tree cp_parser_implicitly_scoped_statement
1892 (cp_parser *, bool *);
1893 static void cp_parser_already_scoped_statement
1896 /* Declarations [gram.dcl.dcl] */
1898 static void cp_parser_declaration_seq_opt
1900 static void cp_parser_declaration
1902 static void cp_parser_block_declaration
1903 (cp_parser *, bool);
1904 static void cp_parser_simple_declaration
1905 (cp_parser *, bool, tree *);
1906 static void cp_parser_decl_specifier_seq
1907 (cp_parser *, cp_parser_flags, cp_decl_specifier_seq *, int *);
1908 static tree cp_parser_storage_class_specifier_opt
1910 static tree cp_parser_function_specifier_opt
1911 (cp_parser *, cp_decl_specifier_seq *);
1912 static tree cp_parser_type_specifier
1913 (cp_parser *, cp_parser_flags, cp_decl_specifier_seq *, bool,
1915 static tree cp_parser_simple_type_specifier
1916 (cp_parser *, cp_decl_specifier_seq *, cp_parser_flags);
1917 static tree cp_parser_type_name
1919 static tree cp_parser_nonclass_name
1920 (cp_parser* parser);
1921 static tree cp_parser_elaborated_type_specifier
1922 (cp_parser *, bool, bool);
1923 static tree cp_parser_enum_specifier
1925 static void cp_parser_enumerator_list
1926 (cp_parser *, tree);
1927 static void cp_parser_enumerator_definition
1928 (cp_parser *, tree);
1929 static tree cp_parser_namespace_name
1931 static void cp_parser_namespace_definition
1933 static void cp_parser_namespace_body
1935 static tree cp_parser_qualified_namespace_specifier
1937 static void cp_parser_namespace_alias_definition
1939 static bool cp_parser_using_declaration
1940 (cp_parser *, bool);
1941 static void cp_parser_using_directive
1943 static tree cp_parser_alias_declaration
1945 static void cp_parser_asm_definition
1947 static void cp_parser_linkage_specification
1949 static void cp_parser_static_assert
1950 (cp_parser *, bool);
1951 static tree cp_parser_decltype
1954 /* Declarators [gram.dcl.decl] */
1956 static tree cp_parser_init_declarator
1957 (cp_parser *, cp_decl_specifier_seq *, VEC (deferred_access_check,gc)*, bool, bool, int, bool *, tree *);
1958 static cp_declarator *cp_parser_declarator
1959 (cp_parser *, cp_parser_declarator_kind, int *, bool *, bool);
1960 static cp_declarator *cp_parser_direct_declarator
1961 (cp_parser *, cp_parser_declarator_kind, int *, bool);
1962 static enum tree_code cp_parser_ptr_operator
1963 (cp_parser *, tree *, cp_cv_quals *);
1964 static cp_cv_quals cp_parser_cv_qualifier_seq_opt
1966 static cp_virt_specifiers cp_parser_virt_specifier_seq_opt
1968 static tree cp_parser_late_return_type_opt
1969 (cp_parser *, cp_cv_quals);
1970 static tree cp_parser_declarator_id
1971 (cp_parser *, bool);
1972 static tree cp_parser_type_id
1974 static tree cp_parser_template_type_arg
1976 static tree cp_parser_trailing_type_id (cp_parser *);
1977 static tree cp_parser_type_id_1
1978 (cp_parser *, bool, bool);
1979 static void cp_parser_type_specifier_seq
1980 (cp_parser *, bool, bool, cp_decl_specifier_seq *);
1981 static tree cp_parser_parameter_declaration_clause
1983 static tree cp_parser_parameter_declaration_list
1984 (cp_parser *, bool *);
1985 static cp_parameter_declarator *cp_parser_parameter_declaration
1986 (cp_parser *, bool, bool *);
1987 static tree cp_parser_default_argument
1988 (cp_parser *, bool);
1989 static void cp_parser_function_body
1991 static tree cp_parser_initializer
1992 (cp_parser *, bool *, bool *);
1993 static tree cp_parser_initializer_clause
1994 (cp_parser *, bool *);
1995 static tree cp_parser_braced_list
1996 (cp_parser*, bool*);
1997 static VEC(constructor_elt,gc) *cp_parser_initializer_list
1998 (cp_parser *, bool *);
2000 static bool cp_parser_ctor_initializer_opt_and_function_body
2003 /* Classes [gram.class] */
2005 static tree cp_parser_class_name
2006 (cp_parser *, bool, bool, enum tag_types, bool, bool, bool);
2007 static tree cp_parser_class_specifier
2009 static tree cp_parser_class_head
2010 (cp_parser *, bool *, tree *, tree *);
2011 static enum tag_types cp_parser_class_key
2013 static void cp_parser_member_specification_opt
2015 static void cp_parser_member_declaration
2017 static tree cp_parser_pure_specifier
2019 static tree cp_parser_constant_initializer
2022 /* Derived classes [gram.class.derived] */
2024 static tree cp_parser_base_clause
2026 static tree cp_parser_base_specifier
2029 /* Special member functions [gram.special] */
2031 static tree cp_parser_conversion_function_id
2033 static tree cp_parser_conversion_type_id
2035 static cp_declarator *cp_parser_conversion_declarator_opt
2037 static bool cp_parser_ctor_initializer_opt
2039 static void cp_parser_mem_initializer_list
2041 static tree cp_parser_mem_initializer
2043 static tree cp_parser_mem_initializer_id
2046 /* Overloading [gram.over] */
2048 static tree cp_parser_operator_function_id
2050 static tree cp_parser_operator
2053 /* Templates [gram.temp] */
2055 static void cp_parser_template_declaration
2056 (cp_parser *, bool);
2057 static tree cp_parser_template_parameter_list
2059 static tree cp_parser_template_parameter
2060 (cp_parser *, bool *, bool *);
2061 static tree cp_parser_type_parameter
2062 (cp_parser *, bool *);
2063 static tree cp_parser_template_id
2064 (cp_parser *, bool, bool, bool);
2065 static tree cp_parser_template_name
2066 (cp_parser *, bool, bool, bool, bool *);
2067 static tree cp_parser_template_argument_list
2069 static tree cp_parser_template_argument
2071 static void cp_parser_explicit_instantiation
2073 static void cp_parser_explicit_specialization
2076 /* Exception handling [gram.exception] */
2078 static tree cp_parser_try_block
2080 static bool cp_parser_function_try_block
2082 static void cp_parser_handler_seq
2084 static void cp_parser_handler
2086 static tree cp_parser_exception_declaration
2088 static tree cp_parser_throw_expression
2090 static tree cp_parser_exception_specification_opt
2092 static tree cp_parser_type_id_list
2095 /* GNU Extensions */
2097 static tree cp_parser_asm_specification_opt
2099 static tree cp_parser_asm_operand_list
2101 static tree cp_parser_asm_clobber_list
2103 static tree cp_parser_asm_label_list
2105 static tree cp_parser_attributes_opt
2107 static tree cp_parser_attribute_list
2109 static bool cp_parser_extension_opt
2110 (cp_parser *, int *);
2111 static void cp_parser_label_declaration
2114 /* Transactional Memory Extensions */
2116 static tree cp_parser_transaction
2117 (cp_parser *, enum rid);
2118 static tree cp_parser_transaction_expression
2119 (cp_parser *, enum rid);
2120 static bool cp_parser_function_transaction
2121 (cp_parser *, enum rid);
2122 static tree cp_parser_transaction_cancel
2125 enum pragma_context { pragma_external, pragma_stmt, pragma_compound };
2126 static bool cp_parser_pragma
2127 (cp_parser *, enum pragma_context);
2129 /* Objective-C++ Productions */
2131 static tree cp_parser_objc_message_receiver
2133 static tree cp_parser_objc_message_args
2135 static tree cp_parser_objc_message_expression
2137 static tree cp_parser_objc_encode_expression
2139 static tree cp_parser_objc_defs_expression
2141 static tree cp_parser_objc_protocol_expression
2143 static tree cp_parser_objc_selector_expression
2145 static tree cp_parser_objc_expression
2147 static bool cp_parser_objc_selector_p
2149 static tree cp_parser_objc_selector
2151 static tree cp_parser_objc_protocol_refs_opt
2153 static void cp_parser_objc_declaration
2154 (cp_parser *, tree);
2155 static tree cp_parser_objc_statement
2157 static bool cp_parser_objc_valid_prefix_attributes
2158 (cp_parser *, tree *);
2159 static void cp_parser_objc_at_property_declaration
2161 static void cp_parser_objc_at_synthesize_declaration
2163 static void cp_parser_objc_at_dynamic_declaration
2165 static tree cp_parser_objc_struct_declaration
2168 /* Utility Routines */
2170 static tree cp_parser_lookup_name
2171 (cp_parser *, tree, enum tag_types, bool, bool, bool, tree *, location_t);
2172 static tree cp_parser_lookup_name_simple
2173 (cp_parser *, tree, location_t);
2174 static tree cp_parser_maybe_treat_template_as_class
2176 static bool cp_parser_check_declarator_template_parameters
2177 (cp_parser *, cp_declarator *, location_t);
2178 static bool cp_parser_check_template_parameters
2179 (cp_parser *, unsigned, location_t, cp_declarator *);
2180 static tree cp_parser_simple_cast_expression
2182 static tree cp_parser_global_scope_opt
2183 (cp_parser *, bool);
2184 static bool cp_parser_constructor_declarator_p
2185 (cp_parser *, bool);
2186 static tree cp_parser_function_definition_from_specifiers_and_declarator
2187 (cp_parser *, cp_decl_specifier_seq *, tree, const cp_declarator *);
2188 static tree cp_parser_function_definition_after_declarator
2189 (cp_parser *, bool);
2190 static void cp_parser_template_declaration_after_export
2191 (cp_parser *, bool);
2192 static void cp_parser_perform_template_parameter_access_checks
2193 (VEC (deferred_access_check,gc)*);
2194 static tree cp_parser_single_declaration
2195 (cp_parser *, VEC (deferred_access_check,gc)*, bool, bool, bool *);
2196 static tree cp_parser_functional_cast
2197 (cp_parser *, tree);
2198 static tree cp_parser_save_member_function_body
2199 (cp_parser *, cp_decl_specifier_seq *, cp_declarator *, tree);
2200 static tree cp_parser_save_nsdmi
2202 static tree cp_parser_enclosed_template_argument_list
2204 static void cp_parser_save_default_args
2205 (cp_parser *, tree);
2206 static void cp_parser_late_parsing_for_member
2207 (cp_parser *, tree);
2208 static tree cp_parser_late_parse_one_default_arg
2209 (cp_parser *, tree, tree, tree);
2210 static void cp_parser_late_parsing_nsdmi
2211 (cp_parser *, tree);
2212 static void cp_parser_late_parsing_default_args
2213 (cp_parser *, tree);
2214 static tree cp_parser_sizeof_operand
2215 (cp_parser *, enum rid);
2216 static tree cp_parser_trait_expr
2217 (cp_parser *, enum rid);
2218 static bool cp_parser_declares_only_class_p
2220 static void cp_parser_set_storage_class
2221 (cp_parser *, cp_decl_specifier_seq *, enum rid, location_t);
2222 static void cp_parser_set_decl_spec_type
2223 (cp_decl_specifier_seq *, tree, location_t, bool);
2224 static bool cp_parser_friend_p
2225 (const cp_decl_specifier_seq *);
2226 static void cp_parser_required_error
2227 (cp_parser *, required_token, bool);
2228 static cp_token *cp_parser_require
2229 (cp_parser *, enum cpp_ttype, required_token);
2230 static cp_token *cp_parser_require_keyword
2231 (cp_parser *, enum rid, required_token);
2232 static bool cp_parser_token_starts_function_definition_p
2234 static bool cp_parser_next_token_starts_class_definition_p
2236 static bool cp_parser_next_token_ends_template_argument_p
2238 static bool cp_parser_nth_token_starts_template_argument_list_p
2239 (cp_parser *, size_t);
2240 static enum tag_types cp_parser_token_is_class_key
2242 static void cp_parser_check_class_key
2243 (enum tag_types, tree type);
2244 static void cp_parser_check_access_in_redeclaration
2245 (tree type, location_t location);
2246 static bool cp_parser_optional_template_keyword
2248 static void cp_parser_pre_parsed_nested_name_specifier
2250 static bool cp_parser_cache_group
2251 (cp_parser *, enum cpp_ttype, unsigned);
2252 static tree cp_parser_cache_defarg
2253 (cp_parser *parser, bool nsdmi);
2254 static void cp_parser_parse_tentatively
2256 static void cp_parser_commit_to_tentative_parse
2258 static void cp_parser_abort_tentative_parse
2260 static bool cp_parser_parse_definitely
2262 static inline bool cp_parser_parsing_tentatively
2264 static bool cp_parser_uncommitted_to_tentative_parse_p
2266 static void cp_parser_error
2267 (cp_parser *, const char *);
2268 static void cp_parser_name_lookup_error
2269 (cp_parser *, tree, tree, name_lookup_error, location_t);
2270 static bool cp_parser_simulate_error
2272 static bool cp_parser_check_type_definition
2274 static void cp_parser_check_for_definition_in_return_type
2275 (cp_declarator *, tree, location_t type_location);
2276 static void cp_parser_check_for_invalid_template_id
2277 (cp_parser *, tree, location_t location);
2278 static bool cp_parser_non_integral_constant_expression
2279 (cp_parser *, non_integral_constant);
2280 static void cp_parser_diagnose_invalid_type_name
2281 (cp_parser *, tree, tree, location_t);
2282 static bool cp_parser_parse_and_diagnose_invalid_type_name
2284 static int cp_parser_skip_to_closing_parenthesis
2285 (cp_parser *, bool, bool, bool);
2286 static void cp_parser_skip_to_end_of_statement
2288 static void cp_parser_consume_semicolon_at_end_of_statement
2290 static void cp_parser_skip_to_end_of_block_or_statement
2292 static bool cp_parser_skip_to_closing_brace
2294 static void cp_parser_skip_to_end_of_template_parameter_list
2296 static void cp_parser_skip_to_pragma_eol
2297 (cp_parser*, cp_token *);
2298 static bool cp_parser_error_occurred
2300 static bool cp_parser_allow_gnu_extensions_p
2302 static bool cp_parser_is_pure_string_literal
2304 static bool cp_parser_is_string_literal
2306 static bool cp_parser_is_keyword
2307 (cp_token *, enum rid);
2308 static tree cp_parser_make_typename_type
2309 (cp_parser *, tree, tree, location_t location);
2310 static cp_declarator * cp_parser_make_indirect_declarator
2311 (enum tree_code, tree, cp_cv_quals, cp_declarator *);
2313 /* Returns nonzero if we are parsing tentatively. */
2316 cp_parser_parsing_tentatively (cp_parser* parser)
2318 return parser->context->next != NULL;
2321 /* Returns nonzero if TOKEN is a string literal. */
2324 cp_parser_is_pure_string_literal (cp_token* token)
2326 return (token->type == CPP_STRING ||
2327 token->type == CPP_STRING16 ||
2328 token->type == CPP_STRING32 ||
2329 token->type == CPP_WSTRING ||
2330 token->type == CPP_UTF8STRING);
2333 /* Returns nonzero if TOKEN is a string literal
2334 of a user-defined string literal. */
2337 cp_parser_is_string_literal (cp_token* token)
2339 return (cp_parser_is_pure_string_literal (token) ||
2340 token->type == CPP_STRING_USERDEF ||
2341 token->type == CPP_STRING16_USERDEF ||
2342 token->type == CPP_STRING32_USERDEF ||
2343 token->type == CPP_WSTRING_USERDEF ||
2344 token->type == CPP_UTF8STRING_USERDEF);
2347 /* Returns nonzero if TOKEN is the indicated KEYWORD. */
2350 cp_parser_is_keyword (cp_token* token, enum rid keyword)
2352 return token->keyword == keyword;
2355 /* If not parsing tentatively, issue a diagnostic of the form
2356 FILE:LINE: MESSAGE before TOKEN
2357 where TOKEN is the next token in the input stream. MESSAGE
2358 (specified by the caller) is usually of the form "expected
2362 cp_parser_error (cp_parser* parser, const char* gmsgid)
2364 if (!cp_parser_simulate_error (parser))
2366 cp_token *token = cp_lexer_peek_token (parser->lexer);
2367 /* This diagnostic makes more sense if it is tagged to the line
2368 of the token we just peeked at. */
2369 cp_lexer_set_source_position_from_token (token);
2371 if (token->type == CPP_PRAGMA)
2373 error_at (token->location,
2374 "%<#pragma%> is not allowed here");
2375 cp_parser_skip_to_pragma_eol (parser, token);
2379 c_parse_error (gmsgid,
2380 /* Because c_parser_error does not understand
2381 CPP_KEYWORD, keywords are treated like
2383 (token->type == CPP_KEYWORD ? CPP_NAME : token->type),
2384 token->u.value, token->flags);
2388 /* Issue an error about name-lookup failing. NAME is the
2389 IDENTIFIER_NODE DECL is the result of
2390 the lookup (as returned from cp_parser_lookup_name). DESIRED is
2391 the thing that we hoped to find. */
2394 cp_parser_name_lookup_error (cp_parser* parser,
2397 name_lookup_error desired,
2398 location_t location)
2400 /* If name lookup completely failed, tell the user that NAME was not
2402 if (decl == error_mark_node)
2404 if (parser->scope && parser->scope != global_namespace)
2405 error_at (location, "%<%E::%E%> has not been declared",
2406 parser->scope, name);
2407 else if (parser->scope == global_namespace)
2408 error_at (location, "%<::%E%> has not been declared", name);
2409 else if (parser->object_scope
2410 && !CLASS_TYPE_P (parser->object_scope))
2411 error_at (location, "request for member %qE in non-class type %qT",
2412 name, parser->object_scope);
2413 else if (parser->object_scope)
2414 error_at (location, "%<%T::%E%> has not been declared",
2415 parser->object_scope, name);
2417 error_at (location, "%qE has not been declared", name);
2419 else if (parser->scope && parser->scope != global_namespace)
2424 error_at (location, "%<%E::%E%> is not a type",
2425 parser->scope, name);
2428 error_at (location, "%<%E::%E%> is not a class or namespace",
2429 parser->scope, name);
2433 "%<%E::%E%> is not a class, namespace, or enumeration",
2434 parser->scope, name);
2441 else if (parser->scope == global_namespace)
2446 error_at (location, "%<::%E%> is not a type", name);
2449 error_at (location, "%<::%E%> is not a class or namespace", name);
2453 "%<::%E%> is not a class, namespace, or enumeration",
2465 error_at (location, "%qE is not a type", name);
2468 error_at (location, "%qE is not a class or namespace", name);
2472 "%qE is not a class, namespace, or enumeration", name);
2480 /* If we are parsing tentatively, remember that an error has occurred
2481 during this tentative parse. Returns true if the error was
2482 simulated; false if a message should be issued by the caller. */
2485 cp_parser_simulate_error (cp_parser* parser)
2487 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
2489 parser->context->status = CP_PARSER_STATUS_KIND_ERROR;
2495 /* Check for repeated decl-specifiers. */
2498 cp_parser_check_decl_spec (cp_decl_specifier_seq *decl_specs,
2499 location_t location)
2503 for (ds = ds_first; ds != ds_last; ++ds)
2505 unsigned count = decl_specs->specs[ds];
2508 /* The "long" specifier is a special case because of "long long". */
2512 error_at (location, "%<long long long%> is too long for GCC");
2514 pedwarn_cxx98 (location, OPT_Wlong_long,
2515 "ISO C++ 1998 does not support %<long long%>");
2519 static const char *const decl_spec_names[] = {
2537 error_at (location, "duplicate %qs", decl_spec_names[ds]);
2542 /* This function is called when a type is defined. If type
2543 definitions are forbidden at this point, an error message is
2547 cp_parser_check_type_definition (cp_parser* parser)
2549 /* If types are forbidden here, issue a message. */
2550 if (parser->type_definition_forbidden_message)
2552 /* Don't use `%s' to print the string, because quotations (`%<', `%>')
2553 in the message need to be interpreted. */
2554 error (parser->type_definition_forbidden_message);
2560 /* This function is called when the DECLARATOR is processed. The TYPE
2561 was a type defined in the decl-specifiers. If it is invalid to
2562 define a type in the decl-specifiers for DECLARATOR, an error is
2563 issued. TYPE_LOCATION is the location of TYPE and is used
2564 for error reporting. */
2567 cp_parser_check_for_definition_in_return_type (cp_declarator *declarator,
2568 tree type, location_t type_location)
2570 /* [dcl.fct] forbids type definitions in return types.
2571 Unfortunately, it's not easy to know whether or not we are
2572 processing a return type until after the fact. */
2574 && (declarator->kind == cdk_pointer
2575 || declarator->kind == cdk_reference
2576 || declarator->kind == cdk_ptrmem))
2577 declarator = declarator->declarator;
2579 && declarator->kind == cdk_function)
2581 error_at (type_location,
2582 "new types may not be defined in a return type");
2583 inform (type_location,
2584 "(perhaps a semicolon is missing after the definition of %qT)",
2589 /* A type-specifier (TYPE) has been parsed which cannot be followed by
2590 "<" in any valid C++ program. If the next token is indeed "<",
2591 issue a message warning the user about what appears to be an
2592 invalid attempt to form a template-id. LOCATION is the location
2593 of the type-specifier (TYPE) */
2596 cp_parser_check_for_invalid_template_id (cp_parser* parser,
2597 tree type, location_t location)
2599 cp_token_position start = 0;
2601 if (cp_lexer_next_token_is (parser->lexer, CPP_LESS))
2604 error_at (location, "%qT is not a template", type);
2605 else if (TREE_CODE (type) == IDENTIFIER_NODE)
2606 error_at (location, "%qE is not a template", type);
2608 error_at (location, "invalid template-id");
2609 /* Remember the location of the invalid "<". */
2610 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
2611 start = cp_lexer_token_position (parser->lexer, true);
2612 /* Consume the "<". */
2613 cp_lexer_consume_token (parser->lexer);
2614 /* Parse the template arguments. */
2615 cp_parser_enclosed_template_argument_list (parser);
2616 /* Permanently remove the invalid template arguments so that
2617 this error message is not issued again. */
2619 cp_lexer_purge_tokens_after (parser->lexer, start);
2623 /* If parsing an integral constant-expression, issue an error message
2624 about the fact that THING appeared and return true. Otherwise,
2625 return false. In either case, set
2626 PARSER->NON_INTEGRAL_CONSTANT_EXPRESSION_P. */
2629 cp_parser_non_integral_constant_expression (cp_parser *parser,
2630 non_integral_constant thing)
2632 parser->non_integral_constant_expression_p = true;
2633 if (parser->integral_constant_expression_p)
2635 if (!parser->allow_non_integral_constant_expression_p)
2637 const char *msg = NULL;
2641 error ("floating-point literal "
2642 "cannot appear in a constant-expression");
2645 error ("a cast to a type other than an integral or "
2646 "enumeration type cannot appear in a "
2647 "constant-expression");
2650 error ("%<typeid%> operator "
2651 "cannot appear in a constant-expression");
2654 error ("non-constant compound literals "
2655 "cannot appear in a constant-expression");
2658 error ("a function call "
2659 "cannot appear in a constant-expression");
2662 error ("an increment "
2663 "cannot appear in a constant-expression");
2666 error ("an decrement "
2667 "cannot appear in a constant-expression");
2670 error ("an array reference "
2671 "cannot appear in a constant-expression");
2673 case NIC_ADDR_LABEL:
2674 error ("the address of a label "
2675 "cannot appear in a constant-expression");
2677 case NIC_OVERLOADED:
2678 error ("calls to overloaded operators "
2679 "cannot appear in a constant-expression");
2681 case NIC_ASSIGNMENT:
2682 error ("an assignment cannot appear in a constant-expression");
2685 error ("a comma operator "
2686 "cannot appear in a constant-expression");
2688 case NIC_CONSTRUCTOR:
2689 error ("a call to a constructor "
2690 "cannot appear in a constant-expression");
2692 case NIC_TRANSACTION:
2693 error ("a transaction expression "
2694 "cannot appear in a constant-expression");
2700 msg = "__FUNCTION__";
2702 case NIC_PRETTY_FUNC:
2703 msg = "__PRETTY_FUNCTION__";
2723 case NIC_PREINCREMENT:
2726 case NIC_PREDECREMENT:
2739 error ("%qs cannot appear in a constant-expression", msg);
2746 /* Emit a diagnostic for an invalid type name. SCOPE is the
2747 qualifying scope (or NULL, if none) for ID. This function commits
2748 to the current active tentative parse, if any. (Otherwise, the
2749 problematic construct might be encountered again later, resulting
2750 in duplicate error messages.) LOCATION is the location of ID. */
2753 cp_parser_diagnose_invalid_type_name (cp_parser *parser,
2754 tree scope, tree id,
2755 location_t location)
2757 tree decl, old_scope;
2758 cp_parser_commit_to_tentative_parse (parser);
2759 /* Try to lookup the identifier. */
2760 old_scope = parser->scope;
2761 parser->scope = scope;
2762 decl = cp_parser_lookup_name_simple (parser, id, location);
2763 parser->scope = old_scope;
2764 /* If the lookup found a template-name, it means that the user forgot
2765 to specify an argument list. Emit a useful error message. */
2766 if (TREE_CODE (decl) == TEMPLATE_DECL)
2768 "invalid use of template-name %qE without an argument list",
2770 else if (TREE_CODE (id) == BIT_NOT_EXPR)
2771 error_at (location, "invalid use of destructor %qD as a type", id);
2772 else if (TREE_CODE (decl) == TYPE_DECL)
2773 /* Something like 'unsigned A a;' */
2774 error_at (location, "invalid combination of multiple type-specifiers");
2775 else if (!parser->scope)
2777 /* Issue an error message. */
2778 error_at (location, "%qE does not name a type", id);
2779 /* If we're in a template class, it's possible that the user was
2780 referring to a type from a base class. For example:
2782 template <typename T> struct A { typedef T X; };
2783 template <typename T> struct B : public A<T> { X x; };
2785 The user should have said "typename A<T>::X". */
2786 if (cxx_dialect < cxx0x && id == ridpointers[(int)RID_CONSTEXPR])
2787 inform (location, "C++11 %<constexpr%> only available with "
2788 "-std=c++11 or -std=gnu++11");
2789 else if (processing_template_decl && current_class_type
2790 && TYPE_BINFO (current_class_type))
2794 for (b = TREE_CHAIN (TYPE_BINFO (current_class_type));
2798 tree base_type = BINFO_TYPE (b);
2799 if (CLASS_TYPE_P (base_type)
2800 && dependent_type_p (base_type))
2803 /* Go from a particular instantiation of the
2804 template (which will have an empty TYPE_FIELDs),
2805 to the main version. */
2806 base_type = CLASSTYPE_PRIMARY_TEMPLATE_TYPE (base_type);
2807 for (field = TYPE_FIELDS (base_type);
2809 field = DECL_CHAIN (field))
2810 if (TREE_CODE (field) == TYPE_DECL
2811 && DECL_NAME (field) == id)
2814 "(perhaps %<typename %T::%E%> was intended)",
2815 BINFO_TYPE (b), id);
2824 /* Here we diagnose qualified-ids where the scope is actually correct,
2825 but the identifier does not resolve to a valid type name. */
2826 else if (parser->scope != error_mark_node)
2828 if (TREE_CODE (parser->scope) == NAMESPACE_DECL)
2829 error_at (location, "%qE in namespace %qE does not name a type",
2831 else if (CLASS_TYPE_P (parser->scope)
2832 && constructor_name_p (id, parser->scope))
2835 error_at (location, "%<%T::%E%> names the constructor, not"
2836 " the type", parser->scope, id);
2837 if (cp_lexer_next_token_is (parser->lexer, CPP_LESS))
2838 error_at (location, "and %qT has no template constructors",
2841 else if (TYPE_P (parser->scope)
2842 && dependent_scope_p (parser->scope))
2843 error_at (location, "need %<typename%> before %<%T::%E%> because "
2844 "%qT is a dependent scope",
2845 parser->scope, id, parser->scope);
2846 else if (TYPE_P (parser->scope))
2847 error_at (location, "%qE in %q#T does not name a type",
2854 /* Check for a common situation where a type-name should be present,
2855 but is not, and issue a sensible error message. Returns true if an
2856 invalid type-name was detected.
2858 The situation handled by this function are variable declarations of the
2859 form `ID a', where `ID' is an id-expression and `a' is a plain identifier.
2860 Usually, `ID' should name a type, but if we got here it means that it
2861 does not. We try to emit the best possible error message depending on
2862 how exactly the id-expression looks like. */
2865 cp_parser_parse_and_diagnose_invalid_type_name (cp_parser *parser)
2868 cp_token *token = cp_lexer_peek_token (parser->lexer);
2870 /* Avoid duplicate error about ambiguous lookup. */
2871 if (token->type == CPP_NESTED_NAME_SPECIFIER)
2873 cp_token *next = cp_lexer_peek_nth_token (parser->lexer, 2);
2874 if (next->type == CPP_NAME && next->ambiguous_p)
2878 cp_parser_parse_tentatively (parser);
2879 id = cp_parser_id_expression (parser,
2880 /*template_keyword_p=*/false,
2881 /*check_dependency_p=*/true,
2882 /*template_p=*/NULL,
2883 /*declarator_p=*/true,
2884 /*optional_p=*/false);
2885 /* If the next token is a (, this is a function with no explicit return
2886 type, i.e. constructor, destructor or conversion op. */
2887 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN)
2888 || TREE_CODE (id) == TYPE_DECL)
2890 cp_parser_abort_tentative_parse (parser);
2893 if (!cp_parser_parse_definitely (parser))
2896 /* Emit a diagnostic for the invalid type. */
2897 cp_parser_diagnose_invalid_type_name (parser, parser->scope,
2898 id, token->location);
2900 /* If we aren't in the middle of a declarator (i.e. in a
2901 parameter-declaration-clause), skip to the end of the declaration;
2902 there's no point in trying to process it. */
2903 if (!parser->in_declarator_p)
2904 cp_parser_skip_to_end_of_block_or_statement (parser);
2908 /* Consume tokens up to, and including, the next non-nested closing `)'.
2909 Returns 1 iff we found a closing `)'. RECOVERING is true, if we
2910 are doing error recovery. Returns -1 if OR_COMMA is true and we
2911 found an unnested comma. */
2914 cp_parser_skip_to_closing_parenthesis (cp_parser *parser,
2919 unsigned paren_depth = 0;
2920 unsigned brace_depth = 0;
2921 unsigned square_depth = 0;
2923 if (recovering && !or_comma
2924 && cp_parser_uncommitted_to_tentative_parse_p (parser))
2929 cp_token * token = cp_lexer_peek_token (parser->lexer);
2931 switch (token->type)
2934 case CPP_PRAGMA_EOL:
2935 /* If we've run out of tokens, then there is no closing `)'. */
2938 /* This is good for lambda expression capture-lists. */
2939 case CPP_OPEN_SQUARE:
2942 case CPP_CLOSE_SQUARE:
2943 if (!square_depth--)
2948 /* This matches the processing in skip_to_end_of_statement. */
2953 case CPP_OPEN_BRACE:
2956 case CPP_CLOSE_BRACE:
2962 if (recovering && or_comma && !brace_depth && !paren_depth
2967 case CPP_OPEN_PAREN:
2972 case CPP_CLOSE_PAREN:
2973 if (!brace_depth && !paren_depth--)
2976 cp_lexer_consume_token (parser->lexer);
2985 /* Consume the token. */
2986 cp_lexer_consume_token (parser->lexer);
2990 /* Consume tokens until we reach the end of the current statement.
2991 Normally, that will be just before consuming a `;'. However, if a
2992 non-nested `}' comes first, then we stop before consuming that. */
2995 cp_parser_skip_to_end_of_statement (cp_parser* parser)
2997 unsigned nesting_depth = 0;
3001 cp_token *token = cp_lexer_peek_token (parser->lexer);
3003 switch (token->type)
3006 case CPP_PRAGMA_EOL:
3007 /* If we've run out of tokens, stop. */
3011 /* If the next token is a `;', we have reached the end of the
3017 case CPP_CLOSE_BRACE:
3018 /* If this is a non-nested '}', stop before consuming it.
3019 That way, when confronted with something like:
3023 we stop before consuming the closing '}', even though we
3024 have not yet reached a `;'. */
3025 if (nesting_depth == 0)
3028 /* If it is the closing '}' for a block that we have
3029 scanned, stop -- but only after consuming the token.
3035 we will stop after the body of the erroneously declared
3036 function, but before consuming the following `typedef'
3038 if (--nesting_depth == 0)
3040 cp_lexer_consume_token (parser->lexer);
3044 case CPP_OPEN_BRACE:
3052 /* Consume the token. */
3053 cp_lexer_consume_token (parser->lexer);
3057 /* This function is called at the end of a statement or declaration.
3058 If the next token is a semicolon, it is consumed; otherwise, error
3059 recovery is attempted. */
3062 cp_parser_consume_semicolon_at_end_of_statement (cp_parser *parser)
3064 /* Look for the trailing `;'. */
3065 if (!cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON))
3067 /* If there is additional (erroneous) input, skip to the end of
3069 cp_parser_skip_to_end_of_statement (parser);
3070 /* If the next token is now a `;', consume it. */
3071 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
3072 cp_lexer_consume_token (parser->lexer);
3076 /* Skip tokens until we have consumed an entire block, or until we
3077 have consumed a non-nested `;'. */
3080 cp_parser_skip_to_end_of_block_or_statement (cp_parser* parser)
3082 int nesting_depth = 0;
3084 while (nesting_depth >= 0)
3086 cp_token *token = cp_lexer_peek_token (parser->lexer);
3088 switch (token->type)
3091 case CPP_PRAGMA_EOL:
3092 /* If we've run out of tokens, stop. */
3096 /* Stop if this is an unnested ';'. */
3101 case CPP_CLOSE_BRACE:
3102 /* Stop if this is an unnested '}', or closes the outermost
3105 if (nesting_depth < 0)
3111 case CPP_OPEN_BRACE:
3120 /* Consume the token. */
3121 cp_lexer_consume_token (parser->lexer);
3125 /* Skip tokens until a non-nested closing curly brace is the next
3126 token, or there are no more tokens. Return true in the first case,
3130 cp_parser_skip_to_closing_brace (cp_parser *parser)
3132 unsigned nesting_depth = 0;
3136 cp_token *token = cp_lexer_peek_token (parser->lexer);
3138 switch (token->type)
3141 case CPP_PRAGMA_EOL:
3142 /* If we've run out of tokens, stop. */
3145 case CPP_CLOSE_BRACE:
3146 /* If the next token is a non-nested `}', then we have reached
3147 the end of the current block. */
3148 if (nesting_depth-- == 0)
3152 case CPP_OPEN_BRACE:
3153 /* If it the next token is a `{', then we are entering a new
3154 block. Consume the entire block. */
3162 /* Consume the token. */
3163 cp_lexer_consume_token (parser->lexer);
3167 /* Consume tokens until we reach the end of the pragma. The PRAGMA_TOK
3168 parameter is the PRAGMA token, allowing us to purge the entire pragma
3172 cp_parser_skip_to_pragma_eol (cp_parser* parser, cp_token *pragma_tok)
3176 parser->lexer->in_pragma = false;
3179 token = cp_lexer_consume_token (parser->lexer);
3180 while (token->type != CPP_PRAGMA_EOL && token->type != CPP_EOF);
3182 /* Ensure that the pragma is not parsed again. */
3183 cp_lexer_purge_tokens_after (parser->lexer, pragma_tok);
3186 /* Require pragma end of line, resyncing with it as necessary. The
3187 arguments are as for cp_parser_skip_to_pragma_eol. */
3190 cp_parser_require_pragma_eol (cp_parser *parser, cp_token *pragma_tok)
3192 parser->lexer->in_pragma = false;
3193 if (!cp_parser_require (parser, CPP_PRAGMA_EOL, RT_PRAGMA_EOL))
3194 cp_parser_skip_to_pragma_eol (parser, pragma_tok);
3197 /* This is a simple wrapper around make_typename_type. When the id is
3198 an unresolved identifier node, we can provide a superior diagnostic
3199 using cp_parser_diagnose_invalid_type_name. */
3202 cp_parser_make_typename_type (cp_parser *parser, tree scope,
3203 tree id, location_t id_location)
3206 if (TREE_CODE (id) == IDENTIFIER_NODE)
3208 result = make_typename_type (scope, id, typename_type,
3209 /*complain=*/tf_none);
3210 if (result == error_mark_node)
3211 cp_parser_diagnose_invalid_type_name (parser, scope, id, id_location);
3214 return make_typename_type (scope, id, typename_type, tf_error);
3217 /* This is a wrapper around the
3218 make_{pointer,ptrmem,reference}_declarator functions that decides
3219 which one to call based on the CODE and CLASS_TYPE arguments. The
3220 CODE argument should be one of the values returned by
3221 cp_parser_ptr_operator. */
3222 static cp_declarator *
3223 cp_parser_make_indirect_declarator (enum tree_code code, tree class_type,
3224 cp_cv_quals cv_qualifiers,
3225 cp_declarator *target)
3227 if (code == ERROR_MARK)
3228 return cp_error_declarator;
3230 if (code == INDIRECT_REF)
3231 if (class_type == NULL_TREE)
3232 return make_pointer_declarator (cv_qualifiers, target);
3234 return make_ptrmem_declarator (cv_qualifiers, class_type, target);
3235 else if (code == ADDR_EXPR && class_type == NULL_TREE)
3236 return make_reference_declarator (cv_qualifiers, target, false);
3237 else if (code == NON_LVALUE_EXPR && class_type == NULL_TREE)
3238 return make_reference_declarator (cv_qualifiers, target, true);
3242 /* Create a new C++ parser. */
3245 cp_parser_new (void)
3251 /* cp_lexer_new_main is called before doing GC allocation because
3252 cp_lexer_new_main might load a PCH file. */
3253 lexer = cp_lexer_new_main ();
3255 /* Initialize the binops_by_token so that we can get the tree
3256 directly from the token. */
3257 for (i = 0; i < sizeof (binops) / sizeof (binops[0]); i++)
3258 binops_by_token[binops[i].token_type] = binops[i];
3260 parser = ggc_alloc_cleared_cp_parser ();
3261 parser->lexer = lexer;
3262 parser->context = cp_parser_context_new (NULL);
3264 /* For now, we always accept GNU extensions. */
3265 parser->allow_gnu_extensions_p = 1;
3267 /* The `>' token is a greater-than operator, not the end of a
3269 parser->greater_than_is_operator_p = true;
3271 parser->default_arg_ok_p = true;
3273 /* We are not parsing a constant-expression. */
3274 parser->integral_constant_expression_p = false;
3275 parser->allow_non_integral_constant_expression_p = false;
3276 parser->non_integral_constant_expression_p = false;
3278 /* Local variable names are not forbidden. */
3279 parser->local_variables_forbidden_p = false;
3281 /* We are not processing an `extern "C"' declaration. */
3282 parser->in_unbraced_linkage_specification_p = false;
3284 /* We are not processing a declarator. */
3285 parser->in_declarator_p = false;
3287 /* We are not processing a template-argument-list. */
3288 parser->in_template_argument_list_p = false;
3290 /* We are not in an iteration statement. */
3291 parser->in_statement = 0;
3293 /* We are not in a switch statement. */
3294 parser->in_switch_statement_p = false;
3296 /* We are not parsing a type-id inside an expression. */
3297 parser->in_type_id_in_expr_p = false;
3299 /* Declarations aren't implicitly extern "C". */
3300 parser->implicit_extern_c = false;
3302 /* String literals should be translated to the execution character set. */
3303 parser->translate_strings_p = true;
3305 /* We are not parsing a function body. */
3306 parser->in_function_body = false;
3308 /* We can correct until told otherwise. */
3309 parser->colon_corrects_to_scope_p = true;
3311 /* The unparsed function queue is empty. */
3312 push_unparsed_function_queues (parser);
3314 /* There are no classes being defined. */
3315 parser->num_classes_being_defined = 0;
3317 /* No template parameters apply. */
3318 parser->num_template_parameter_lists = 0;
3323 /* Create a cp_lexer structure which will emit the tokens in CACHE
3324 and push it onto the parser's lexer stack. This is used for delayed
3325 parsing of in-class method bodies and default arguments, and should
3326 not be confused with tentative parsing. */
3328 cp_parser_push_lexer_for_tokens (cp_parser *parser, cp_token_cache *cache)
3330 cp_lexer *lexer = cp_lexer_new_from_tokens (cache);
3331 lexer->next = parser->lexer;
3332 parser->lexer = lexer;
3334 /* Move the current source position to that of the first token in the
3336 cp_lexer_set_source_position_from_token (lexer->next_token);
3339 /* Pop the top lexer off the parser stack. This is never used for the
3340 "main" lexer, only for those pushed by cp_parser_push_lexer_for_tokens. */
3342 cp_parser_pop_lexer (cp_parser *parser)
3344 cp_lexer *lexer = parser->lexer;
3345 parser->lexer = lexer->next;
3346 cp_lexer_destroy (lexer);
3348 /* Put the current source position back where it was before this
3349 lexer was pushed. */
3350 cp_lexer_set_source_position_from_token (parser->lexer->next_token);
3353 /* Lexical conventions [gram.lex] */
3355 /* Parse an identifier. Returns an IDENTIFIER_NODE representing the
3359 cp_parser_identifier (cp_parser* parser)
3363 /* Look for the identifier. */
3364 token = cp_parser_require (parser, CPP_NAME, RT_NAME);
3365 /* Return the value. */
3366 return token ? token->u.value : error_mark_node;
3369 /* Parse a sequence of adjacent string constants. Returns a
3370 TREE_STRING representing the combined, nul-terminated string
3371 constant. If TRANSLATE is true, translate the string to the
3372 execution character set. If WIDE_OK is true, a wide string is
3375 C++98 [lex.string] says that if a narrow string literal token is
3376 adjacent to a wide string literal token, the behavior is undefined.
3377 However, C99 6.4.5p4 says that this results in a wide string literal.
3378 We follow C99 here, for consistency with the C front end.
3380 This code is largely lifted from lex_string() in c-lex.c.
3382 FUTURE: ObjC++ will need to handle @-strings here. */
3384 cp_parser_string_literal (cp_parser *parser, bool translate, bool wide_ok)
3388 struct obstack str_ob;
3389 cpp_string str, istr, *strs;
3391 enum cpp_ttype type, curr_type;
3392 int have_suffix_p = 0;
3394 tree suffix_id = NULL_TREE;
3395 bool curr_tok_is_userdef_p = false;
3397 tok = cp_lexer_peek_token (parser->lexer);
3398 if (!cp_parser_is_string_literal (tok))
3400 cp_parser_error (parser, "expected string-literal");
3401 return error_mark_node;
3404 if (cpp_userdef_string_p (tok->type))
3406 string_tree = USERDEF_LITERAL_VALUE (tok->u.value);
3407 curr_type = cpp_userdef_string_remove_type (tok->type);
3408 curr_tok_is_userdef_p = true;
3412 string_tree = tok->u.value;
3413 curr_type = tok->type;
3417 /* Try to avoid the overhead of creating and destroying an obstack
3418 for the common case of just one string. */
3419 if (!cp_parser_is_string_literal
3420 (cp_lexer_peek_nth_token (parser->lexer, 2)))
3422 cp_lexer_consume_token (parser->lexer);
3424 str.text = (const unsigned char *)TREE_STRING_POINTER (string_tree);
3425 str.len = TREE_STRING_LENGTH (string_tree);
3428 if (curr_tok_is_userdef_p)
3430 suffix_id = USERDEF_LITERAL_SUFFIX_ID (tok->u.value);
3432 curr_type = cpp_userdef_string_remove_type (tok->type);
3435 curr_type = tok->type;
3441 gcc_obstack_init (&str_ob);
3446 cp_lexer_consume_token (parser->lexer);
3448 str.text = (const unsigned char *)TREE_STRING_POINTER (string_tree);
3449 str.len = TREE_STRING_LENGTH (string_tree);
3451 if (curr_tok_is_userdef_p)
3453 tree curr_suffix_id = USERDEF_LITERAL_SUFFIX_ID (tok->u.value);
3454 if (have_suffix_p == 0)
3456 suffix_id = curr_suffix_id;
3459 else if (have_suffix_p == 1
3460 && curr_suffix_id != suffix_id)
3462 error ("inconsistent user-defined literal suffixes"
3463 " %qD and %qD in string literal",
3464 suffix_id, curr_suffix_id);
3467 curr_type = cpp_userdef_string_remove_type (tok->type);
3470 curr_type = tok->type;
3472 if (type != curr_type)
3474 if (type == CPP_STRING)
3476 else if (curr_type != CPP_STRING)
3477 error_at (tok->location,
3478 "unsupported non-standard concatenation "
3479 "of string literals");
3482 obstack_grow (&str_ob, &str, sizeof (cpp_string));
3484 tok = cp_lexer_peek_token (parser->lexer);
3485 if (cpp_userdef_string_p (tok->type))
3487 string_tree = USERDEF_LITERAL_VALUE (tok->u.value);
3488 curr_type = cpp_userdef_string_remove_type (tok->type);
3489 curr_tok_is_userdef_p = true;
3493 string_tree = tok->u.value;
3494 curr_type = tok->type;
3495 curr_tok_is_userdef_p = false;
3498 while (cp_parser_is_string_literal (tok));
3500 strs = (cpp_string *) obstack_finish (&str_ob);
3503 if (type != CPP_STRING && !wide_ok)
3505 cp_parser_error (parser, "a wide string is invalid in this context");
3509 if ((translate ? cpp_interpret_string : cpp_interpret_string_notranslate)
3510 (parse_in, strs, count, &istr, type))
3512 value = build_string (istr.len, (const char *)istr.text);
3513 free (CONST_CAST (unsigned char *, istr.text));
3519 case CPP_UTF8STRING:
3520 TREE_TYPE (value) = char_array_type_node;
3523 TREE_TYPE (value) = char16_array_type_node;
3526 TREE_TYPE (value) = char32_array_type_node;
3529 TREE_TYPE (value) = wchar_array_type_node;
3533 value = fix_string_type (value);
3537 tree literal = build_userdef_literal (suffix_id, value, NULL_TREE);
3538 tok->u.value = literal;
3539 return cp_parser_userdef_string_literal (tok);
3543 /* cpp_interpret_string has issued an error. */
3544 value = error_mark_node;
3547 obstack_free (&str_ob, 0);
3552 /* Look up a literal operator with the name and the exact arguments. */
3555 lookup_literal_operator (tree name, VEC(tree,gc) *args)
3558 decl = lookup_name (name);
3559 if (!decl || !is_overloaded_fn (decl))
3560 return error_mark_node;
3562 for (fns = decl; fns; fns = OVL_NEXT (fns))
3566 tree fn = OVL_CURRENT (fns);
3567 tree argtypes = NULL_TREE;
3568 argtypes = TYPE_ARG_TYPES (TREE_TYPE (fn));
3569 if (argtypes != NULL_TREE)
3571 for (ix = 0; ix < VEC_length (tree, args) && argtypes != NULL_TREE;
3572 ++ix, argtypes = TREE_CHAIN (argtypes))
3574 tree targ = TREE_VALUE (argtypes);
3575 tree tparm = TREE_TYPE (VEC_index (tree, args, ix));
3576 bool ptr = TREE_CODE (targ) == POINTER_TYPE;
3577 bool arr = TREE_CODE (tparm) == ARRAY_TYPE;
3578 if ((ptr || arr || !same_type_p (targ, tparm))
3580 || !same_type_p (TREE_TYPE (targ),
3581 TREE_TYPE (tparm))))
3589 return error_mark_node;
3592 /* Parse a user-defined char constant. Returns a call to a user-defined
3593 literal operator taking the character as an argument. */
3596 cp_parser_userdef_char_literal (cp_parser *parser)
3598 cp_token *token = cp_lexer_consume_token (parser->lexer);
3599 tree literal = token->u.value;
3600 tree suffix_id = USERDEF_LITERAL_SUFFIX_ID (literal);
3601 tree value = USERDEF_LITERAL_VALUE (literal);
3602 tree name = cp_literal_operator_id (IDENTIFIER_POINTER (suffix_id));
3605 /* Build up a call to the user-defined operator */
3606 /* Lookup the name we got back from the id-expression. */
3607 VEC(tree,gc) *args = make_tree_vector ();
3608 VEC_safe_push (tree, gc, args, value);
3609 decl = lookup_literal_operator (name, args);
3610 if (!decl || decl == error_mark_node)
3612 error ("unable to find character literal operator %qD with %qT argument",
3613 name, TREE_TYPE (value));
3614 release_tree_vector (args);
3615 return error_mark_node;
3617 result = finish_call_expr (decl, &args, false, true, tf_warning_or_error);
3618 release_tree_vector (args);
3619 if (result != error_mark_node)
3622 error ("unable to find character literal operator %qD with %qT argument",
3623 name, TREE_TYPE (value));
3624 return error_mark_node;
3627 /* A subroutine of cp_parser_userdef_numeric_literal to
3628 create a char... template parameter pack from a string node. */
3631 make_char_string_pack (tree value)
3634 tree argpack = make_node (NONTYPE_ARGUMENT_PACK);
3635 const char *str = TREE_STRING_POINTER (value);
3636 int i, len = TREE_STRING_LENGTH (value) - 1;
3637 tree argvec = make_tree_vec (1);
3639 /* Fill in CHARVEC with all of the parameters. */
3640 charvec = make_tree_vec (len);
3641 for (i = 0; i < len; ++i)
3642 TREE_VEC_ELT (charvec, i) = build_int_cst (char_type_node, str[i]);
3644 /* Build the argument packs. */
3645 SET_ARGUMENT_PACK_ARGS (argpack, charvec);
3646 TREE_TYPE (argpack) = char_type_node;
3648 TREE_VEC_ELT (argvec, 0) = argpack;
3653 /* Parse a user-defined numeric constant. returns a call to a user-defined
3654 literal operator. */
3657 cp_parser_userdef_numeric_literal (cp_parser *parser)
3659 cp_token *token = cp_lexer_consume_token (parser->lexer);
3660 tree literal = token->u.value;
3661 tree suffix_id = USERDEF_LITERAL_SUFFIX_ID (literal);
3662 tree value = USERDEF_LITERAL_VALUE (literal);
3663 tree num_string = USERDEF_LITERAL_NUM_STRING (literal);
3664 tree name = cp_literal_operator_id (IDENTIFIER_POINTER (suffix_id));
3668 /* Look for a literal operator taking the exact type of numeric argument
3669 as the literal value. */
3670 args = make_tree_vector ();
3671 VEC_safe_push (tree, gc, args, value);
3672 decl = lookup_literal_operator (name, args);
3673 if (decl && decl != error_mark_node)
3675 result = finish_call_expr (decl, &args, false, true, tf_none);
3676 if (result != error_mark_node)
3678 release_tree_vector (args);
3682 release_tree_vector (args);
3684 /* If the numeric argument didn't work, look for a raw literal
3685 operator taking a const char* argument consisting of the number
3686 in string format. */
3687 args = make_tree_vector ();
3688 VEC_safe_push (tree, gc, args, num_string);
3689 decl = lookup_literal_operator (name, args);
3690 if (decl && decl != error_mark_node)
3692 result = finish_call_expr (decl, &args, false, true, tf_none);
3693 if (result != error_mark_node)
3695 release_tree_vector (args);
3699 release_tree_vector (args);
3701 /* If the raw literal didn't work, look for a non-type template
3702 function with parameter pack char.... Call the function with
3703 template parameter characters representing the number. */
3704 args = make_tree_vector ();
3705 decl = lookup_literal_operator (name, args);
3706 if (decl && decl != error_mark_node)
3708 tree tmpl_args = make_char_string_pack (num_string);
3709 decl = lookup_template_function (decl, tmpl_args);
3710 result = finish_call_expr (decl, &args, false, true, tf_none);
3711 if (result != error_mark_node)
3713 release_tree_vector (args);
3717 release_tree_vector (args);
3719 error ("unable to find numeric literal operator %qD", name);
3720 return error_mark_node;
3723 /* Parse a user-defined string constant. Returns a call to a user-defined
3724 literal operator taking a character pointer and the length of the string
3728 cp_parser_userdef_string_literal (cp_token *token)
3730 tree literal = token->u.value;
3731 tree suffix_id = USERDEF_LITERAL_SUFFIX_ID (literal);
3732 tree name = cp_literal_operator_id (IDENTIFIER_POINTER (suffix_id));
3733 tree value = USERDEF_LITERAL_VALUE (literal);
3734 int len = TREE_STRING_LENGTH (value)
3735 / TREE_INT_CST_LOW (TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (value)))) - 1;
3738 /* Build up a call to the user-defined operator */
3739 /* Lookup the name we got back from the id-expression. */
3740 VEC(tree,gc) *args = make_tree_vector ();
3741 VEC_safe_push (tree, gc, args, value);
3742 VEC_safe_push (tree, gc, args, build_int_cst (size_type_node, len));
3743 decl = lookup_name (name);
3744 if (!decl || decl == error_mark_node)
3746 error ("unable to find string literal operator %qD", name);
3747 release_tree_vector (args);
3748 return error_mark_node;
3750 result = finish_call_expr (decl, &args, false, true, tf_none);
3751 release_tree_vector (args);
3752 if (result != error_mark_node)
3755 error ("unable to find string literal operator %qD with %qT, %qT arguments",
3756 name, TREE_TYPE (value), size_type_node);
3757 return error_mark_node;
3761 /* Basic concepts [gram.basic] */
3763 /* Parse a translation-unit.
3766 declaration-seq [opt]
3768 Returns TRUE if all went well. */
3771 cp_parser_translation_unit (cp_parser* parser)
3773 /* The address of the first non-permanent object on the declarator
3775 static void *declarator_obstack_base;
3779 /* Create the declarator obstack, if necessary. */
3780 if (!cp_error_declarator)
3782 gcc_obstack_init (&declarator_obstack);
3783 /* Create the error declarator. */
3784 cp_error_declarator = make_declarator (cdk_error);
3785 /* Create the empty parameter list. */
3786 no_parameters = make_parameter_declarator (NULL, NULL, NULL_TREE);
3787 /* Remember where the base of the declarator obstack lies. */
3788 declarator_obstack_base = obstack_next_free (&declarator_obstack);
3791 cp_parser_declaration_seq_opt (parser);
3793 /* If there are no tokens left then all went well. */
3794 if (cp_lexer_next_token_is (parser->lexer, CPP_EOF))
3796 /* Get rid of the token array; we don't need it any more. */
3797 cp_lexer_destroy (parser->lexer);
3798 parser->lexer = NULL;
3800 /* This file might have been a context that's implicitly extern
3801 "C". If so, pop the lang context. (Only relevant for PCH.) */
3802 if (parser->implicit_extern_c)
3804 pop_lang_context ();
3805 parser->implicit_extern_c = false;
3809 finish_translation_unit ();
3815 cp_parser_error (parser, "expected declaration");
3819 /* Make sure the declarator obstack was fully cleaned up. */
3820 gcc_assert (obstack_next_free (&declarator_obstack)
3821 == declarator_obstack_base);
3823 /* All went well. */
3827 /* Expressions [gram.expr] */
3829 /* Parse a primary-expression.
3840 ( compound-statement )
3841 __builtin_va_arg ( assignment-expression , type-id )
3842 __builtin_offsetof ( type-id , offsetof-expression )
3845 __has_nothrow_assign ( type-id )
3846 __has_nothrow_constructor ( type-id )
3847 __has_nothrow_copy ( type-id )
3848 __has_trivial_assign ( type-id )
3849 __has_trivial_constructor ( type-id )
3850 __has_trivial_copy ( type-id )
3851 __has_trivial_destructor ( type-id )
3852 __has_virtual_destructor ( type-id )
3853 __is_abstract ( type-id )
3854 __is_base_of ( type-id , type-id )
3855 __is_class ( type-id )
3856 __is_convertible_to ( type-id , type-id )
3857 __is_empty ( type-id )
3858 __is_enum ( type-id )
3859 __is_final ( type-id )
3860 __is_literal_type ( type-id )
3861 __is_pod ( type-id )
3862 __is_polymorphic ( type-id )
3863 __is_std_layout ( type-id )
3864 __is_trivial ( type-id )
3865 __is_union ( type-id )
3867 Objective-C++ Extension:
3875 ADDRESS_P is true iff this expression was immediately preceded by
3876 "&" and therefore might denote a pointer-to-member. CAST_P is true
3877 iff this expression is the target of a cast. TEMPLATE_ARG_P is
3878 true iff this expression is a template argument.
3880 Returns a representation of the expression. Upon return, *IDK
3881 indicates what kind of id-expression (if any) was present. */
3884 cp_parser_primary_expression (cp_parser *parser,
3887 bool template_arg_p,
3890 cp_token *token = NULL;
3892 /* Assume the primary expression is not an id-expression. */
3893 *idk = CP_ID_KIND_NONE;
3895 /* Peek at the next token. */
3896 token = cp_lexer_peek_token (parser->lexer);
3897 switch (token->type)
3906 user-defined-literal */
3912 if (TREE_CODE (token->u.value) == USERDEF_LITERAL)
3913 return cp_parser_userdef_numeric_literal (parser);
3914 token = cp_lexer_consume_token (parser->lexer);
3915 if (TREE_CODE (token->u.value) == FIXED_CST)
3917 error_at (token->location,
3918 "fixed-point types not supported in C++");
3919 return error_mark_node;
3921 /* Floating-point literals are only allowed in an integral
3922 constant expression if they are cast to an integral or
3923 enumeration type. */
3924 if (TREE_CODE (token->u.value) == REAL_CST
3925 && parser->integral_constant_expression_p
3928 /* CAST_P will be set even in invalid code like "int(2.7 +
3929 ...)". Therefore, we have to check that the next token
3930 is sure to end the cast. */
3933 cp_token *next_token;
3935 next_token = cp_lexer_peek_token (parser->lexer);
3936 if (/* The comma at the end of an
3937 enumerator-definition. */
3938 next_token->type != CPP_COMMA
3939 /* The curly brace at the end of an enum-specifier. */
3940 && next_token->type != CPP_CLOSE_BRACE
3941 /* The end of a statement. */
3942 && next_token->type != CPP_SEMICOLON
3943 /* The end of the cast-expression. */
3944 && next_token->type != CPP_CLOSE_PAREN
3945 /* The end of an array bound. */
3946 && next_token->type != CPP_CLOSE_SQUARE
3947 /* The closing ">" in a template-argument-list. */
3948 && (next_token->type != CPP_GREATER
3949 || parser->greater_than_is_operator_p)
3950 /* C++0x only: A ">>" treated like two ">" tokens,
3951 in a template-argument-list. */
3952 && (next_token->type != CPP_RSHIFT
3953 || (cxx_dialect == cxx98)
3954 || parser->greater_than_is_operator_p))
3958 /* If we are within a cast, then the constraint that the
3959 cast is to an integral or enumeration type will be
3960 checked at that point. If we are not within a cast, then
3961 this code is invalid. */
3963 cp_parser_non_integral_constant_expression (parser, NIC_FLOAT);
3965 return token->u.value;
3967 case CPP_CHAR_USERDEF:
3968 case CPP_CHAR16_USERDEF:
3969 case CPP_CHAR32_USERDEF:
3970 case CPP_WCHAR_USERDEF:
3971 return cp_parser_userdef_char_literal (parser);
3977 case CPP_UTF8STRING:
3978 case CPP_STRING_USERDEF:
3979 case CPP_STRING16_USERDEF:
3980 case CPP_STRING32_USERDEF:
3981 case CPP_WSTRING_USERDEF:
3982 case CPP_UTF8STRING_USERDEF:
3983 /* ??? Should wide strings be allowed when parser->translate_strings_p
3984 is false (i.e. in attributes)? If not, we can kill the third
3985 argument to cp_parser_string_literal. */
3986 return cp_parser_string_literal (parser,
3987 parser->translate_strings_p,
3990 case CPP_OPEN_PAREN:
3993 bool saved_greater_than_is_operator_p;
3995 /* Consume the `('. */
3996 cp_lexer_consume_token (parser->lexer);
3997 /* Within a parenthesized expression, a `>' token is always
3998 the greater-than operator. */
3999 saved_greater_than_is_operator_p
4000 = parser->greater_than_is_operator_p;
4001 parser->greater_than_is_operator_p = true;
4002 /* If we see `( { ' then we are looking at the beginning of
4003 a GNU statement-expression. */
4004 if (cp_parser_allow_gnu_extensions_p (parser)
4005 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
4007 /* Statement-expressions are not allowed by the standard. */
4008 pedwarn (token->location, OPT_pedantic,
4009 "ISO C++ forbids braced-groups within expressions");
4011 /* And they're not allowed outside of a function-body; you
4012 cannot, for example, write:
4014 int i = ({ int j = 3; j + 1; });
4016 at class or namespace scope. */
4017 if (!parser->in_function_body
4018 || parser->in_template_argument_list_p)
4020 error_at (token->location,
4021 "statement-expressions are not allowed outside "
4022 "functions nor in template-argument lists");
4023 cp_parser_skip_to_end_of_block_or_statement (parser);
4024 expr = error_mark_node;
4028 /* Start the statement-expression. */
4029 expr = begin_stmt_expr ();
4030 /* Parse the compound-statement. */
4031 cp_parser_compound_statement (parser, expr, false, false);
4033 expr = finish_stmt_expr (expr, false);
4038 /* Parse the parenthesized expression. */
4039 expr = cp_parser_expression (parser, cast_p, idk);
4040 /* Let the front end know that this expression was
4041 enclosed in parentheses. This matters in case, for
4042 example, the expression is of the form `A::B', since
4043 `&A::B' might be a pointer-to-member, but `&(A::B)' is
4045 finish_parenthesized_expr (expr);
4046 /* DR 705: Wrapping an unqualified name in parentheses
4047 suppresses arg-dependent lookup. We want to pass back
4048 CP_ID_KIND_QUALIFIED for suppressing vtable lookup
4049 (c++/37862), but none of the others. */
4050 if (*idk != CP_ID_KIND_QUALIFIED)
4051 *idk = CP_ID_KIND_NONE;
4053 /* The `>' token might be the end of a template-id or
4054 template-parameter-list now. */
4055 parser->greater_than_is_operator_p
4056 = saved_greater_than_is_operator_p;
4057 /* Consume the `)'. */
4058 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
4059 cp_parser_skip_to_end_of_statement (parser);
4064 case CPP_OPEN_SQUARE:
4065 if (c_dialect_objc ())
4066 /* We have an Objective-C++ message. */
4067 return cp_parser_objc_expression (parser);
4069 tree lam = cp_parser_lambda_expression (parser);
4070 /* Don't warn about a failed tentative parse. */
4071 if (cp_parser_error_occurred (parser))
4072 return error_mark_node;
4073 maybe_warn_cpp0x (CPP0X_LAMBDA_EXPR);
4077 case CPP_OBJC_STRING:
4078 if (c_dialect_objc ())
4079 /* We have an Objective-C++ string literal. */
4080 return cp_parser_objc_expression (parser);
4081 cp_parser_error (parser, "expected primary-expression");
4082 return error_mark_node;
4085 switch (token->keyword)
4087 /* These two are the boolean literals. */
4089 cp_lexer_consume_token (parser->lexer);
4090 return boolean_true_node;
4092 cp_lexer_consume_token (parser->lexer);
4093 return boolean_false_node;
4095 /* The `__null' literal. */
4097 cp_lexer_consume_token (parser->lexer);
4100 /* The `nullptr' literal. */
4102 cp_lexer_consume_token (parser->lexer);
4103 return nullptr_node;
4105 /* Recognize the `this' keyword. */
4107 cp_lexer_consume_token (parser->lexer);
4108 if (parser->local_variables_forbidden_p)
4110 error_at (token->location,
4111 "%<this%> may not be used in this context");
4112 return error_mark_node;
4114 /* Pointers cannot appear in constant-expressions. */
4115 if (cp_parser_non_integral_constant_expression (parser, NIC_THIS))
4116 return error_mark_node;
4117 return finish_this_expr ();
4119 /* The `operator' keyword can be the beginning of an
4124 case RID_FUNCTION_NAME:
4125 case RID_PRETTY_FUNCTION_NAME:
4126 case RID_C99_FUNCTION_NAME:
4128 non_integral_constant name;
4130 /* The symbols __FUNCTION__, __PRETTY_FUNCTION__, and
4131 __func__ are the names of variables -- but they are
4132 treated specially. Therefore, they are handled here,
4133 rather than relying on the generic id-expression logic
4134 below. Grammatically, these names are id-expressions.
4136 Consume the token. */
4137 token = cp_lexer_consume_token (parser->lexer);
4139 switch (token->keyword)
4141 case RID_FUNCTION_NAME:
4142 name = NIC_FUNC_NAME;
4144 case RID_PRETTY_FUNCTION_NAME:
4145 name = NIC_PRETTY_FUNC;
4147 case RID_C99_FUNCTION_NAME:
4148 name = NIC_C99_FUNC;
4154 if (cp_parser_non_integral_constant_expression (parser, name))
4155 return error_mark_node;
4157 /* Look up the name. */
4158 return finish_fname (token->u.value);
4166 /* The `__builtin_va_arg' construct is used to handle
4167 `va_arg'. Consume the `__builtin_va_arg' token. */
4168 cp_lexer_consume_token (parser->lexer);
4169 /* Look for the opening `('. */
4170 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
4171 /* Now, parse the assignment-expression. */
4172 expression = cp_parser_assignment_expression (parser,
4173 /*cast_p=*/false, NULL);
4174 /* Look for the `,'. */
4175 cp_parser_require (parser, CPP_COMMA, RT_COMMA);
4176 /* Parse the type-id. */
4177 type = cp_parser_type_id (parser);
4178 /* Look for the closing `)'. */
4179 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
4180 /* Using `va_arg' in a constant-expression is not
4182 if (cp_parser_non_integral_constant_expression (parser,
4184 return error_mark_node;
4185 return build_x_va_arg (expression, type);
4189 return cp_parser_builtin_offsetof (parser);
4191 case RID_HAS_NOTHROW_ASSIGN:
4192 case RID_HAS_NOTHROW_CONSTRUCTOR:
4193 case RID_HAS_NOTHROW_COPY:
4194 case RID_HAS_TRIVIAL_ASSIGN:
4195 case RID_HAS_TRIVIAL_CONSTRUCTOR:
4196 case RID_HAS_TRIVIAL_COPY:
4197 case RID_HAS_TRIVIAL_DESTRUCTOR:
4198 case RID_HAS_VIRTUAL_DESTRUCTOR:
4199 case RID_IS_ABSTRACT:
4200 case RID_IS_BASE_OF:
4202 case RID_IS_CONVERTIBLE_TO:
4206 case RID_IS_LITERAL_TYPE:
4208 case RID_IS_POLYMORPHIC:
4209 case RID_IS_STD_LAYOUT:
4210 case RID_IS_TRIVIAL:
4212 return cp_parser_trait_expr (parser, token->keyword);
4214 /* Objective-C++ expressions. */
4216 case RID_AT_PROTOCOL:
4217 case RID_AT_SELECTOR:
4218 return cp_parser_objc_expression (parser);
4221 if (parser->in_function_body
4222 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
4225 error_at (token->location,
4226 "a template declaration cannot appear at block scope");
4227 cp_parser_skip_to_end_of_block_or_statement (parser);
4228 return error_mark_node;
4231 cp_parser_error (parser, "expected primary-expression");
4232 return error_mark_node;
4235 /* An id-expression can start with either an identifier, a
4236 `::' as the beginning of a qualified-id, or the "operator"
4240 case CPP_TEMPLATE_ID:
4241 case CPP_NESTED_NAME_SPECIFIER:
4245 const char *error_msg;
4248 cp_token *id_expr_token;
4251 /* Parse the id-expression. */
4253 = cp_parser_id_expression (parser,
4254 /*template_keyword_p=*/false,
4255 /*check_dependency_p=*/true,
4257 /*declarator_p=*/false,
4258 /*optional_p=*/false);
4259 if (id_expression == error_mark_node)
4260 return error_mark_node;
4261 id_expr_token = token;
4262 token = cp_lexer_peek_token (parser->lexer);
4263 done = (token->type != CPP_OPEN_SQUARE
4264 && token->type != CPP_OPEN_PAREN
4265 && token->type != CPP_DOT
4266 && token->type != CPP_DEREF
4267 && token->type != CPP_PLUS_PLUS
4268 && token->type != CPP_MINUS_MINUS);
4269 /* If we have a template-id, then no further lookup is
4270 required. If the template-id was for a template-class, we
4271 will sometimes have a TYPE_DECL at this point. */
4272 if (TREE_CODE (id_expression) == TEMPLATE_ID_EXPR
4273 || TREE_CODE (id_expression) == TYPE_DECL)
4274 decl = id_expression;
4275 /* Look up the name. */
4278 tree ambiguous_decls;
4280 /* If we already know that this lookup is ambiguous, then
4281 we've already issued an error message; there's no reason
4283 if (id_expr_token->type == CPP_NAME
4284 && id_expr_token->ambiguous_p)
4286 cp_parser_simulate_error (parser);
4287 return error_mark_node;
4290 decl = cp_parser_lookup_name (parser, id_expression,
4293 /*is_namespace=*/false,
4294 /*check_dependency=*/true,
4296 id_expr_token->location);
4297 /* If the lookup was ambiguous, an error will already have
4299 if (ambiguous_decls)
4300 return error_mark_node;
4302 /* In Objective-C++, we may have an Objective-C 2.0
4303 dot-syntax for classes here. */
4304 if (c_dialect_objc ()
4305 && cp_lexer_peek_token (parser->lexer)->type == CPP_DOT
4306 && TREE_CODE (decl) == TYPE_DECL
4307 && objc_is_class_name (decl))
4310 cp_lexer_consume_token (parser->lexer);
4311 component = cp_parser_identifier (parser);
4312 if (component == error_mark_node)
4313 return error_mark_node;
4315 return objc_build_class_component_ref (id_expression, component);
4318 /* In Objective-C++, an instance variable (ivar) may be preferred
4319 to whatever cp_parser_lookup_name() found. */
4320 decl = objc_lookup_ivar (decl, id_expression);
4322 /* If name lookup gives us a SCOPE_REF, then the
4323 qualifying scope was dependent. */
4324 if (TREE_CODE (decl) == SCOPE_REF)
4326 /* At this point, we do not know if DECL is a valid
4327 integral constant expression. We assume that it is
4328 in fact such an expression, so that code like:
4330 template <int N> struct A {
4334 is accepted. At template-instantiation time, we
4335 will check that B<N>::i is actually a constant. */
4338 /* Check to see if DECL is a local variable in a context
4339 where that is forbidden. */
4340 if (parser->local_variables_forbidden_p
4341 && local_variable_p (decl))
4343 /* It might be that we only found DECL because we are
4344 trying to be generous with pre-ISO scoping rules.
4345 For example, consider:
4349 for (int i = 0; i < 10; ++i) {}
4350 extern void f(int j = i);
4353 Here, name look up will originally find the out
4354 of scope `i'. We need to issue a warning message,
4355 but then use the global `i'. */
4356 decl = check_for_out_of_scope_variable (decl);
4357 if (local_variable_p (decl))
4359 error_at (id_expr_token->location,
4360 "local variable %qD may not appear in this context",
4362 return error_mark_node;
4367 decl = (finish_id_expression
4368 (id_expression, decl, parser->scope,
4370 parser->integral_constant_expression_p,
4371 parser->allow_non_integral_constant_expression_p,
4372 &parser->non_integral_constant_expression_p,
4373 template_p, done, address_p,
4376 id_expr_token->location));
4378 cp_parser_error (parser, error_msg);
4382 /* Anything else is an error. */
4384 cp_parser_error (parser, "expected primary-expression");
4385 return error_mark_node;
4389 /* Parse an id-expression.
4396 :: [opt] nested-name-specifier template [opt] unqualified-id
4398 :: operator-function-id
4401 Return a representation of the unqualified portion of the
4402 identifier. Sets PARSER->SCOPE to the qualifying scope if there is
4403 a `::' or nested-name-specifier.
4405 Often, if the id-expression was a qualified-id, the caller will
4406 want to make a SCOPE_REF to represent the qualified-id. This
4407 function does not do this in order to avoid wastefully creating
4408 SCOPE_REFs when they are not required.
4410 If TEMPLATE_KEYWORD_P is true, then we have just seen the
4413 If CHECK_DEPENDENCY_P is false, then names are looked up inside
4414 uninstantiated templates.
4416 If *TEMPLATE_P is non-NULL, it is set to true iff the
4417 `template' keyword is used to explicitly indicate that the entity
4418 named is a template.
4420 If DECLARATOR_P is true, the id-expression is appearing as part of
4421 a declarator, rather than as part of an expression. */
4424 cp_parser_id_expression (cp_parser *parser,
4425 bool template_keyword_p,
4426 bool check_dependency_p,
4431 bool global_scope_p;
4432 bool nested_name_specifier_p;
4434 /* Assume the `template' keyword was not used. */
4436 *template_p = template_keyword_p;
4438 /* Look for the optional `::' operator. */
4440 = (cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false)
4442 /* Look for the optional nested-name-specifier. */
4443 nested_name_specifier_p
4444 = (cp_parser_nested_name_specifier_opt (parser,
4445 /*typename_keyword_p=*/false,
4450 /* If there is a nested-name-specifier, then we are looking at
4451 the first qualified-id production. */
4452 if (nested_name_specifier_p)
4455 tree saved_object_scope;
4456 tree saved_qualifying_scope;
4457 tree unqualified_id;
4460 /* See if the next token is the `template' keyword. */
4462 template_p = &is_template;
4463 *template_p = cp_parser_optional_template_keyword (parser);
4464 /* Name lookup we do during the processing of the
4465 unqualified-id might obliterate SCOPE. */
4466 saved_scope = parser->scope;
4467 saved_object_scope = parser->object_scope;
4468 saved_qualifying_scope = parser->qualifying_scope;
4469 /* Process the final unqualified-id. */
4470 unqualified_id = cp_parser_unqualified_id (parser, *template_p,
4473 /*optional_p=*/false);
4474 /* Restore the SAVED_SCOPE for our caller. */
4475 parser->scope = saved_scope;
4476 parser->object_scope = saved_object_scope;
4477 parser->qualifying_scope = saved_qualifying_scope;
4479 return unqualified_id;
4481 /* Otherwise, if we are in global scope, then we are looking at one
4482 of the other qualified-id productions. */
4483 else if (global_scope_p)
4488 /* Peek at the next token. */
4489 token = cp_lexer_peek_token (parser->lexer);
4491 /* If it's an identifier, and the next token is not a "<", then
4492 we can avoid the template-id case. This is an optimization
4493 for this common case. */
4494 if (token->type == CPP_NAME
4495 && !cp_parser_nth_token_starts_template_argument_list_p
4497 return cp_parser_identifier (parser);
4499 cp_parser_parse_tentatively (parser);
4500 /* Try a template-id. */
4501 id = cp_parser_template_id (parser,
4502 /*template_keyword_p=*/false,
4503 /*check_dependency_p=*/true,
4505 /* If that worked, we're done. */
4506 if (cp_parser_parse_definitely (parser))
4509 /* Peek at the next token. (Changes in the token buffer may
4510 have invalidated the pointer obtained above.) */
4511 token = cp_lexer_peek_token (parser->lexer);
4513 switch (token->type)
4516 return cp_parser_identifier (parser);
4519 if (token->keyword == RID_OPERATOR)
4520 return cp_parser_operator_function_id (parser);
4524 cp_parser_error (parser, "expected id-expression");
4525 return error_mark_node;
4529 return cp_parser_unqualified_id (parser, template_keyword_p,
4530 /*check_dependency_p=*/true,
4535 /* Parse an unqualified-id.
4539 operator-function-id
4540 conversion-function-id
4544 If TEMPLATE_KEYWORD_P is TRUE, we have just seen the `template'
4545 keyword, in a construct like `A::template ...'.
4547 Returns a representation of unqualified-id. For the `identifier'
4548 production, an IDENTIFIER_NODE is returned. For the `~ class-name'
4549 production a BIT_NOT_EXPR is returned; the operand of the
4550 BIT_NOT_EXPR is an IDENTIFIER_NODE for the class-name. For the
4551 other productions, see the documentation accompanying the
4552 corresponding parsing functions. If CHECK_DEPENDENCY_P is false,
4553 names are looked up in uninstantiated templates. If DECLARATOR_P
4554 is true, the unqualified-id is appearing as part of a declarator,
4555 rather than as part of an expression. */
4558 cp_parser_unqualified_id (cp_parser* parser,
4559 bool template_keyword_p,
4560 bool check_dependency_p,
4566 /* Peek at the next token. */
4567 token = cp_lexer_peek_token (parser->lexer);
4569 switch (token->type)
4575 /* We don't know yet whether or not this will be a
4577 cp_parser_parse_tentatively (parser);
4578 /* Try a template-id. */
4579 id = cp_parser_template_id (parser, template_keyword_p,
4582 /* If it worked, we're done. */
4583 if (cp_parser_parse_definitely (parser))
4585 /* Otherwise, it's an ordinary identifier. */
4586 return cp_parser_identifier (parser);
4589 case CPP_TEMPLATE_ID:
4590 return cp_parser_template_id (parser, template_keyword_p,
4597 tree qualifying_scope;
4602 /* Consume the `~' token. */
4603 cp_lexer_consume_token (parser->lexer);
4604 /* Parse the class-name. The standard, as written, seems to
4607 template <typename T> struct S { ~S (); };
4608 template <typename T> S<T>::~S() {}
4610 is invalid, since `~' must be followed by a class-name, but
4611 `S<T>' is dependent, and so not known to be a class.
4612 That's not right; we need to look in uninstantiated
4613 templates. A further complication arises from:
4615 template <typename T> void f(T t) {
4619 Here, it is not possible to look up `T' in the scope of `T'
4620 itself. We must look in both the current scope, and the
4621 scope of the containing complete expression.
4623 Yet another issue is:
4632 The standard does not seem to say that the `S' in `~S'
4633 should refer to the type `S' and not the data member
4636 /* DR 244 says that we look up the name after the "~" in the
4637 same scope as we looked up the qualifying name. That idea
4638 isn't fully worked out; it's more complicated than that. */
4639 scope = parser->scope;
4640 object_scope = parser->object_scope;
4641 qualifying_scope = parser->qualifying_scope;
4643 /* Check for invalid scopes. */
4644 if (scope == error_mark_node)
4646 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
4647 cp_lexer_consume_token (parser->lexer);
4648 return error_mark_node;
4650 if (scope && TREE_CODE (scope) == NAMESPACE_DECL)
4652 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
4653 error_at (token->location,
4654 "scope %qT before %<~%> is not a class-name",
4656 cp_parser_simulate_error (parser);
4657 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
4658 cp_lexer_consume_token (parser->lexer);
4659 return error_mark_node;
4661 gcc_assert (!scope || TYPE_P (scope));
4663 /* If the name is of the form "X::~X" it's OK even if X is a
4665 token = cp_lexer_peek_token (parser->lexer);
4667 && token->type == CPP_NAME
4668 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
4670 && (token->u.value == TYPE_IDENTIFIER (scope)
4671 || (CLASS_TYPE_P (scope)
4672 && constructor_name_p (token->u.value, scope))))
4674 cp_lexer_consume_token (parser->lexer);
4675 return build_nt (BIT_NOT_EXPR, scope);
4678 /* If there was an explicit qualification (S::~T), first look
4679 in the scope given by the qualification (i.e., S).
4681 Note: in the calls to cp_parser_class_name below we pass
4682 typename_type so that lookup finds the injected-class-name
4683 rather than the constructor. */
4685 type_decl = NULL_TREE;
4688 cp_parser_parse_tentatively (parser);
4689 type_decl = cp_parser_class_name (parser,
4690 /*typename_keyword_p=*/false,
4691 /*template_keyword_p=*/false,
4693 /*check_dependency=*/false,
4694 /*class_head_p=*/false,
4696 if (cp_parser_parse_definitely (parser))
4699 /* In "N::S::~S", look in "N" as well. */
4700 if (!done && scope && qualifying_scope)
4702 cp_parser_parse_tentatively (parser);
4703 parser->scope = qualifying_scope;
4704 parser->object_scope = NULL_TREE;
4705 parser->qualifying_scope = NULL_TREE;
4707 = cp_parser_class_name (parser,
4708 /*typename_keyword_p=*/false,
4709 /*template_keyword_p=*/false,
4711 /*check_dependency=*/false,
4712 /*class_head_p=*/false,
4714 if (cp_parser_parse_definitely (parser))
4717 /* In "p->S::~T", look in the scope given by "*p" as well. */
4718 else if (!done && object_scope)
4720 cp_parser_parse_tentatively (parser);
4721 parser->scope = object_scope;
4722 parser->object_scope = NULL_TREE;
4723 parser->qualifying_scope = NULL_TREE;
4725 = cp_parser_class_name (parser,
4726 /*typename_keyword_p=*/false,
4727 /*template_keyword_p=*/false,
4729 /*check_dependency=*/false,
4730 /*class_head_p=*/false,
4732 if (cp_parser_parse_definitely (parser))
4735 /* Look in the surrounding context. */
4738 parser->scope = NULL_TREE;
4739 parser->object_scope = NULL_TREE;
4740 parser->qualifying_scope = NULL_TREE;
4741 if (processing_template_decl)
4742 cp_parser_parse_tentatively (parser);
4744 = cp_parser_class_name (parser,
4745 /*typename_keyword_p=*/false,
4746 /*template_keyword_p=*/false,
4748 /*check_dependency=*/false,
4749 /*class_head_p=*/false,
4751 if (processing_template_decl
4752 && ! cp_parser_parse_definitely (parser))
4754 /* We couldn't find a type with this name, so just accept
4755 it and check for a match at instantiation time. */
4756 type_decl = cp_parser_identifier (parser);
4757 if (type_decl != error_mark_node)
4758 type_decl = build_nt (BIT_NOT_EXPR, type_decl);
4762 /* If an error occurred, assume that the name of the
4763 destructor is the same as the name of the qualifying
4764 class. That allows us to keep parsing after running
4765 into ill-formed destructor names. */
4766 if (type_decl == error_mark_node && scope)
4767 return build_nt (BIT_NOT_EXPR, scope);
4768 else if (type_decl == error_mark_node)
4769 return error_mark_node;
4771 /* Check that destructor name and scope match. */
4772 if (declarator_p && scope && !check_dtor_name (scope, type_decl))
4774 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
4775 error_at (token->location,
4776 "declaration of %<~%T%> as member of %qT",
4778 cp_parser_simulate_error (parser);
4779 return error_mark_node;
4784 A typedef-name that names a class shall not be used as the
4785 identifier in the declarator for a destructor declaration. */
4787 && !DECL_IMPLICIT_TYPEDEF_P (type_decl)
4788 && !DECL_SELF_REFERENCE_P (type_decl)
4789 && !cp_parser_uncommitted_to_tentative_parse_p (parser))
4790 error_at (token->location,
4791 "typedef-name %qD used as destructor declarator",
4794 return build_nt (BIT_NOT_EXPR, TREE_TYPE (type_decl));
4798 if (token->keyword == RID_OPERATOR)
4802 /* This could be a template-id, so we try that first. */
4803 cp_parser_parse_tentatively (parser);
4804 /* Try a template-id. */
4805 id = cp_parser_template_id (parser, template_keyword_p,
4806 /*check_dependency_p=*/true,
4808 /* If that worked, we're done. */
4809 if (cp_parser_parse_definitely (parser))
4811 /* We still don't know whether we're looking at an
4812 operator-function-id or a conversion-function-id. */
4813 cp_parser_parse_tentatively (parser);
4814 /* Try an operator-function-id. */
4815 id = cp_parser_operator_function_id (parser);
4816 /* If that didn't work, try a conversion-function-id. */
4817 if (!cp_parser_parse_definitely (parser))
4818 id = cp_parser_conversion_function_id (parser);
4819 else if (UDLIT_OPER_P (id))
4822 const char *name = UDLIT_OP_SUFFIX (id);
4823 if (name[0] != '_' && !in_system_header)
4824 warning (0, "literal operator suffixes not preceded by %<_%>"
4825 " are reserved for future standardization");
4835 cp_parser_error (parser, "expected unqualified-id");
4836 return error_mark_node;
4840 /* Parse an (optional) nested-name-specifier.
4842 nested-name-specifier: [C++98]
4843 class-or-namespace-name :: nested-name-specifier [opt]
4844 class-or-namespace-name :: template nested-name-specifier [opt]
4846 nested-name-specifier: [C++0x]
4849 nested-name-specifier identifier ::
4850 nested-name-specifier template [opt] simple-template-id ::
4852 PARSER->SCOPE should be set appropriately before this function is
4853 called. TYPENAME_KEYWORD_P is TRUE if the `typename' keyword is in
4854 effect. TYPE_P is TRUE if we non-type bindings should be ignored
4857 Sets PARSER->SCOPE to the class (TYPE) or namespace
4858 (NAMESPACE_DECL) specified by the nested-name-specifier, or leaves
4859 it unchanged if there is no nested-name-specifier. Returns the new
4860 scope iff there is a nested-name-specifier, or NULL_TREE otherwise.
4862 If IS_DECLARATION is TRUE, the nested-name-specifier is known to be
4863 part of a declaration and/or decl-specifier. */
4866 cp_parser_nested_name_specifier_opt (cp_parser *parser,
4867 bool typename_keyword_p,
4868 bool check_dependency_p,
4870 bool is_declaration)
4872 bool success = false;
4873 cp_token_position start = 0;
4876 /* Remember where the nested-name-specifier starts. */
4877 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
4879 start = cp_lexer_token_position (parser->lexer, false);
4880 push_deferring_access_checks (dk_deferred);
4887 tree saved_qualifying_scope;
4888 bool template_keyword_p;
4890 /* Spot cases that cannot be the beginning of a
4891 nested-name-specifier. */
4892 token = cp_lexer_peek_token (parser->lexer);
4894 /* If the next token is CPP_NESTED_NAME_SPECIFIER, just process
4895 the already parsed nested-name-specifier. */
4896 if (token->type == CPP_NESTED_NAME_SPECIFIER)
4898 /* Grab the nested-name-specifier and continue the loop. */
4899 cp_parser_pre_parsed_nested_name_specifier (parser);
4900 /* If we originally encountered this nested-name-specifier
4901 with IS_DECLARATION set to false, we will not have
4902 resolved TYPENAME_TYPEs, so we must do so here. */
4904 && TREE_CODE (parser->scope) == TYPENAME_TYPE)
4906 new_scope = resolve_typename_type (parser->scope,
4907 /*only_current_p=*/false);
4908 if (TREE_CODE (new_scope) != TYPENAME_TYPE)
4909 parser->scope = new_scope;
4915 /* Spot cases that cannot be the beginning of a
4916 nested-name-specifier. On the second and subsequent times
4917 through the loop, we look for the `template' keyword. */
4918 if (success && token->keyword == RID_TEMPLATE)
4920 /* A template-id can start a nested-name-specifier. */
4921 else if (token->type == CPP_TEMPLATE_ID)
4923 /* DR 743: decltype can be used in a nested-name-specifier. */
4924 else if (token_is_decltype (token))
4928 /* If the next token is not an identifier, then it is
4929 definitely not a type-name or namespace-name. */
4930 if (token->type != CPP_NAME)
4932 /* If the following token is neither a `<' (to begin a
4933 template-id), nor a `::', then we are not looking at a
4934 nested-name-specifier. */
4935 token = cp_lexer_peek_nth_token (parser->lexer, 2);
4937 if (token->type == CPP_COLON
4938 && parser->colon_corrects_to_scope_p
4939 && cp_lexer_peek_nth_token (parser->lexer, 3)->type == CPP_NAME)
4941 error_at (token->location,
4942 "found %<:%> in nested-name-specifier, expected %<::%>");
4943 token->type = CPP_SCOPE;
4946 if (token->type != CPP_SCOPE
4947 && !cp_parser_nth_token_starts_template_argument_list_p
4952 /* The nested-name-specifier is optional, so we parse
4954 cp_parser_parse_tentatively (parser);
4956 /* Look for the optional `template' keyword, if this isn't the
4957 first time through the loop. */
4959 template_keyword_p = cp_parser_optional_template_keyword (parser);
4961 template_keyword_p = false;
4963 /* Save the old scope since the name lookup we are about to do
4964 might destroy it. */
4965 old_scope = parser->scope;
4966 saved_qualifying_scope = parser->qualifying_scope;
4967 /* In a declarator-id like "X<T>::I::Y<T>" we must be able to
4968 look up names in "X<T>::I" in order to determine that "Y" is
4969 a template. So, if we have a typename at this point, we make
4970 an effort to look through it. */
4972 && !typename_keyword_p
4974 && TREE_CODE (parser->scope) == TYPENAME_TYPE)
4975 parser->scope = resolve_typename_type (parser->scope,
4976 /*only_current_p=*/false);
4977 /* Parse the qualifying entity. */
4979 = cp_parser_qualifying_entity (parser,
4985 /* Look for the `::' token. */
4986 cp_parser_require (parser, CPP_SCOPE, RT_SCOPE);
4988 /* If we found what we wanted, we keep going; otherwise, we're
4990 if (!cp_parser_parse_definitely (parser))
4992 bool error_p = false;
4994 /* Restore the OLD_SCOPE since it was valid before the
4995 failed attempt at finding the last
4996 class-or-namespace-name. */
4997 parser->scope = old_scope;
4998 parser->qualifying_scope = saved_qualifying_scope;
5000 /* If the next token is a decltype, and the one after that is a
5001 `::', then the decltype has failed to resolve to a class or
5002 enumeration type. Give this error even when parsing
5003 tentatively since it can't possibly be valid--and we're going
5004 to replace it with a CPP_NESTED_NAME_SPECIFIER below, so we
5005 won't get another chance.*/
5006 if (cp_lexer_next_token_is (parser->lexer, CPP_DECLTYPE)
5007 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
5010 token = cp_lexer_consume_token (parser->lexer);
5011 error_at (token->location, "decltype evaluates to %qT, "
5012 "which is not a class or enumeration type",
5014 parser->scope = error_mark_node;
5018 cp_lexer_consume_token (parser->lexer);
5021 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
5023 /* If the next token is an identifier, and the one after
5024 that is a `::', then any valid interpretation would have
5025 found a class-or-namespace-name. */
5026 while (cp_lexer_next_token_is (parser->lexer, CPP_NAME)
5027 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
5029 && (cp_lexer_peek_nth_token (parser->lexer, 3)->type
5032 token = cp_lexer_consume_token (parser->lexer);
5035 if (!token->ambiguous_p)
5038 tree ambiguous_decls;
5040 decl = cp_parser_lookup_name (parser, token->u.value,
5042 /*is_template=*/false,
5043 /*is_namespace=*/false,
5044 /*check_dependency=*/true,
5047 if (TREE_CODE (decl) == TEMPLATE_DECL)
5048 error_at (token->location,
5049 "%qD used without template parameters",
5051 else if (ambiguous_decls)
5053 error_at (token->location,
5054 "reference to %qD is ambiguous",
5056 print_candidates (ambiguous_decls);
5057 decl = error_mark_node;
5061 if (cxx_dialect != cxx98)
5062 cp_parser_name_lookup_error
5063 (parser, token->u.value, decl, NLE_NOT_CXX98,
5066 cp_parser_name_lookup_error
5067 (parser, token->u.value, decl, NLE_CXX98,
5071 parser->scope = error_mark_node;
5073 /* Treat this as a successful nested-name-specifier
5078 If the name found is not a class-name (clause
5079 _class_) or namespace-name (_namespace.def_), the
5080 program is ill-formed. */
5083 cp_lexer_consume_token (parser->lexer);
5087 /* We've found one valid nested-name-specifier. */
5089 /* Name lookup always gives us a DECL. */
5090 if (TREE_CODE (new_scope) == TYPE_DECL)
5091 new_scope = TREE_TYPE (new_scope);
5092 /* Uses of "template" must be followed by actual templates. */
5093 if (template_keyword_p
5094 && !(CLASS_TYPE_P (new_scope)
5095 && ((CLASSTYPE_USE_TEMPLATE (new_scope)
5096 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (new_scope)))
5097 || CLASSTYPE_IS_TEMPLATE (new_scope)))
5098 && !(TREE_CODE (new_scope) == TYPENAME_TYPE
5099 && (TREE_CODE (TYPENAME_TYPE_FULLNAME (new_scope))
5100 == TEMPLATE_ID_EXPR)))
5101 permerror (input_location, TYPE_P (new_scope)
5102 ? G_("%qT is not a template")
5103 : G_("%qD is not a template"),
5105 /* If it is a class scope, try to complete it; we are about to
5106 be looking up names inside the class. */
5107 if (TYPE_P (new_scope)
5108 /* Since checking types for dependency can be expensive,
5109 avoid doing it if the type is already complete. */
5110 && !COMPLETE_TYPE_P (new_scope)
5111 /* Do not try to complete dependent types. */
5112 && !dependent_type_p (new_scope))
5114 new_scope = complete_type (new_scope);
5115 /* If it is a typedef to current class, use the current
5116 class instead, as the typedef won't have any names inside
5118 if (!COMPLETE_TYPE_P (new_scope)
5119 && currently_open_class (new_scope))
5120 new_scope = TYPE_MAIN_VARIANT (new_scope);
5122 /* Make sure we look in the right scope the next time through
5124 parser->scope = new_scope;
5127 /* If parsing tentatively, replace the sequence of tokens that makes
5128 up the nested-name-specifier with a CPP_NESTED_NAME_SPECIFIER
5129 token. That way, should we re-parse the token stream, we will
5130 not have to repeat the effort required to do the parse, nor will
5131 we issue duplicate error messages. */
5132 if (success && start)
5136 token = cp_lexer_token_at (parser->lexer, start);
5137 /* Reset the contents of the START token. */
5138 token->type = CPP_NESTED_NAME_SPECIFIER;
5139 /* Retrieve any deferred checks. Do not pop this access checks yet
5140 so the memory will not be reclaimed during token replacing below. */
5141 token->u.tree_check_value = ggc_alloc_cleared_tree_check ();
5142 token->u.tree_check_value->value = parser->scope;
5143 token->u.tree_check_value->checks = get_deferred_access_checks ();
5144 token->u.tree_check_value->qualifying_scope =
5145 parser->qualifying_scope;
5146 token->keyword = RID_MAX;
5148 /* Purge all subsequent tokens. */
5149 cp_lexer_purge_tokens_after (parser->lexer, start);
5153 pop_to_parent_deferring_access_checks ();
5155 return success ? parser->scope : NULL_TREE;
5158 /* Parse a nested-name-specifier. See
5159 cp_parser_nested_name_specifier_opt for details. This function
5160 behaves identically, except that it will an issue an error if no
5161 nested-name-specifier is present. */
5164 cp_parser_nested_name_specifier (cp_parser *parser,
5165 bool typename_keyword_p,
5166 bool check_dependency_p,
5168 bool is_declaration)
5172 /* Look for the nested-name-specifier. */
5173 scope = cp_parser_nested_name_specifier_opt (parser,
5178 /* If it was not present, issue an error message. */
5181 cp_parser_error (parser, "expected nested-name-specifier");
5182 parser->scope = NULL_TREE;
5188 /* Parse the qualifying entity in a nested-name-specifier. For C++98,
5189 this is either a class-name or a namespace-name (which corresponds
5190 to the class-or-namespace-name production in the grammar). For
5191 C++0x, it can also be a type-name that refers to an enumeration
5192 type or a simple-template-id.
5194 TYPENAME_KEYWORD_P is TRUE iff the `typename' keyword is in effect.
5195 TEMPLATE_KEYWORD_P is TRUE iff the `template' keyword is in effect.
5196 CHECK_DEPENDENCY_P is FALSE iff dependent names should be looked up.
5197 TYPE_P is TRUE iff the next name should be taken as a class-name,
5198 even the same name is declared to be another entity in the same
5201 Returns the class (TYPE_DECL) or namespace (NAMESPACE_DECL)
5202 specified by the class-or-namespace-name. If neither is found the
5203 ERROR_MARK_NODE is returned. */
5206 cp_parser_qualifying_entity (cp_parser *parser,
5207 bool typename_keyword_p,
5208 bool template_keyword_p,
5209 bool check_dependency_p,
5211 bool is_declaration)
5214 tree saved_qualifying_scope;
5215 tree saved_object_scope;
5218 bool successful_parse_p;
5220 /* DR 743: decltype can appear in a nested-name-specifier. */
5221 if (cp_lexer_next_token_is_decltype (parser->lexer))
5223 scope = cp_parser_decltype (parser);
5224 if (TREE_CODE (scope) != ENUMERAL_TYPE
5225 && !MAYBE_CLASS_TYPE_P (scope))
5227 cp_parser_simulate_error (parser);
5228 return error_mark_node;
5230 if (TYPE_NAME (scope))
5231 scope = TYPE_NAME (scope);
5235 /* Before we try to parse the class-name, we must save away the
5236 current PARSER->SCOPE since cp_parser_class_name will destroy
5238 saved_scope = parser->scope;
5239 saved_qualifying_scope = parser->qualifying_scope;
5240 saved_object_scope = parser->object_scope;
5241 /* Try for a class-name first. If the SAVED_SCOPE is a type, then
5242 there is no need to look for a namespace-name. */
5243 only_class_p = template_keyword_p
5244 || (saved_scope && TYPE_P (saved_scope) && cxx_dialect == cxx98);
5246 cp_parser_parse_tentatively (parser);
5247 scope = cp_parser_class_name (parser,
5250 type_p ? class_type : none_type,
5252 /*class_head_p=*/false,
5254 successful_parse_p = only_class_p || cp_parser_parse_definitely (parser);
5255 /* If that didn't work and we're in C++0x mode, try for a type-name. */
5257 && cxx_dialect != cxx98
5258 && !successful_parse_p)
5260 /* Restore the saved scope. */
5261 parser->scope = saved_scope;
5262 parser->qualifying_scope = saved_qualifying_scope;
5263 parser->object_scope = saved_object_scope;
5265 /* Parse tentatively. */
5266 cp_parser_parse_tentatively (parser);
5268 /* Parse a type-name */
5269 scope = cp_parser_type_name (parser);
5271 /* "If the name found does not designate a namespace or a class,
5272 enumeration, or dependent type, the program is ill-formed."
5274 We cover classes and dependent types above and namespaces below,
5275 so this code is only looking for enums. */
5276 if (!scope || TREE_CODE (scope) != TYPE_DECL
5277 || TREE_CODE (TREE_TYPE (scope)) != ENUMERAL_TYPE)
5278 cp_parser_simulate_error (parser);
5280 successful_parse_p = cp_parser_parse_definitely (parser);
5282 /* If that didn't work, try for a namespace-name. */
5283 if (!only_class_p && !successful_parse_p)
5285 /* Restore the saved scope. */
5286 parser->scope = saved_scope;
5287 parser->qualifying_scope = saved_qualifying_scope;
5288 parser->object_scope = saved_object_scope;
5289 /* If we are not looking at an identifier followed by the scope
5290 resolution operator, then this is not part of a
5291 nested-name-specifier. (Note that this function is only used
5292 to parse the components of a nested-name-specifier.) */
5293 if (cp_lexer_next_token_is_not (parser->lexer, CPP_NAME)
5294 || cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_SCOPE)
5295 return error_mark_node;
5296 scope = cp_parser_namespace_name (parser);
5302 /* Parse a postfix-expression.
5306 postfix-expression [ expression ]
5307 postfix-expression ( expression-list [opt] )
5308 simple-type-specifier ( expression-list [opt] )
5309 typename :: [opt] nested-name-specifier identifier
5310 ( expression-list [opt] )
5311 typename :: [opt] nested-name-specifier template [opt] template-id
5312 ( expression-list [opt] )
5313 postfix-expression . template [opt] id-expression
5314 postfix-expression -> template [opt] id-expression
5315 postfix-expression . pseudo-destructor-name
5316 postfix-expression -> pseudo-destructor-name
5317 postfix-expression ++
5318 postfix-expression --
5319 dynamic_cast < type-id > ( expression )
5320 static_cast < type-id > ( expression )
5321 reinterpret_cast < type-id > ( expression )
5322 const_cast < type-id > ( expression )
5323 typeid ( expression )
5329 ( type-id ) { initializer-list , [opt] }
5331 This extension is a GNU version of the C99 compound-literal
5332 construct. (The C99 grammar uses `type-name' instead of `type-id',
5333 but they are essentially the same concept.)
5335 If ADDRESS_P is true, the postfix expression is the operand of the
5336 `&' operator. CAST_P is true if this expression is the target of a
5339 If MEMBER_ACCESS_ONLY_P, we only allow postfix expressions that are
5340 class member access expressions [expr.ref].
5342 Returns a representation of the expression. */
5345 cp_parser_postfix_expression (cp_parser *parser, bool address_p, bool cast_p,
5346 bool member_access_only_p,
5347 cp_id_kind * pidk_return)
5351 cp_id_kind idk = CP_ID_KIND_NONE;
5352 tree postfix_expression = NULL_TREE;
5353 bool is_member_access = false;
5355 /* Peek at the next token. */
5356 token = cp_lexer_peek_token (parser->lexer);
5357 /* Some of the productions are determined by keywords. */
5358 keyword = token->keyword;
5368 const char *saved_message;
5370 /* All of these can be handled in the same way from the point
5371 of view of parsing. Begin by consuming the token
5372 identifying the cast. */
5373 cp_lexer_consume_token (parser->lexer);
5375 /* New types cannot be defined in the cast. */
5376 saved_message = parser->type_definition_forbidden_message;
5377 parser->type_definition_forbidden_message
5378 = G_("types may not be defined in casts");
5380 /* Look for the opening `<'. */
5381 cp_parser_require (parser, CPP_LESS, RT_LESS);
5382 /* Parse the type to which we are casting. */
5383 type = cp_parser_type_id (parser);
5384 /* Look for the closing `>'. */
5385 cp_parser_require (parser, CPP_GREATER, RT_GREATER);
5386 /* Restore the old message. */
5387 parser->type_definition_forbidden_message = saved_message;
5389 /* And the expression which is being cast. */
5390 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
5391 expression = cp_parser_expression (parser, /*cast_p=*/true, & idk);
5392 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
5394 /* Only type conversions to integral or enumeration types
5395 can be used in constant-expressions. */
5396 if (!cast_valid_in_integral_constant_expression_p (type)
5397 && cp_parser_non_integral_constant_expression (parser, NIC_CAST))
5398 return error_mark_node;
5404 = build_dynamic_cast (type, expression, tf_warning_or_error);
5408 = build_static_cast (type, expression, tf_warning_or_error);
5412 = build_reinterpret_cast (type, expression,
5413 tf_warning_or_error);
5417 = build_const_cast (type, expression, tf_warning_or_error);
5428 const char *saved_message;
5429 bool saved_in_type_id_in_expr_p;
5431 /* Consume the `typeid' token. */
5432 cp_lexer_consume_token (parser->lexer);
5433 /* Look for the `(' token. */
5434 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
5435 /* Types cannot be defined in a `typeid' expression. */
5436 saved_message = parser->type_definition_forbidden_message;
5437 parser->type_definition_forbidden_message
5438 = G_("types may not be defined in a %<typeid%> expression");
5439 /* We can't be sure yet whether we're looking at a type-id or an
5441 cp_parser_parse_tentatively (parser);
5442 /* Try a type-id first. */
5443 saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
5444 parser->in_type_id_in_expr_p = true;
5445 type = cp_parser_type_id (parser);
5446 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
5447 /* Look for the `)' token. Otherwise, we can't be sure that
5448 we're not looking at an expression: consider `typeid (int
5449 (3))', for example. */
5450 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
5451 /* If all went well, simply lookup the type-id. */
5452 if (cp_parser_parse_definitely (parser))
5453 postfix_expression = get_typeid (type);
5454 /* Otherwise, fall back to the expression variant. */
5459 /* Look for an expression. */
5460 expression = cp_parser_expression (parser, /*cast_p=*/false, & idk);
5461 /* Compute its typeid. */
5462 postfix_expression = build_typeid (expression);
5463 /* Look for the `)' token. */
5464 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
5466 /* Restore the saved message. */
5467 parser->type_definition_forbidden_message = saved_message;
5468 /* `typeid' may not appear in an integral constant expression. */
5469 if (cp_parser_non_integral_constant_expression (parser, NIC_TYPEID))
5470 return error_mark_node;
5477 /* The syntax permitted here is the same permitted for an
5478 elaborated-type-specifier. */
5479 type = cp_parser_elaborated_type_specifier (parser,
5480 /*is_friend=*/false,
5481 /*is_declaration=*/false);
5482 postfix_expression = cp_parser_functional_cast (parser, type);
5490 /* If the next thing is a simple-type-specifier, we may be
5491 looking at a functional cast. We could also be looking at
5492 an id-expression. So, we try the functional cast, and if
5493 that doesn't work we fall back to the primary-expression. */
5494 cp_parser_parse_tentatively (parser);
5495 /* Look for the simple-type-specifier. */
5496 type = cp_parser_simple_type_specifier (parser,
5497 /*decl_specs=*/NULL,
5498 CP_PARSER_FLAGS_NONE);
5499 /* Parse the cast itself. */
5500 if (!cp_parser_error_occurred (parser))
5502 = cp_parser_functional_cast (parser, type);
5503 /* If that worked, we're done. */
5504 if (cp_parser_parse_definitely (parser))
5507 /* If the functional-cast didn't work out, try a
5508 compound-literal. */
5509 if (cp_parser_allow_gnu_extensions_p (parser)
5510 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
5512 VEC(constructor_elt,gc) *initializer_list = NULL;
5513 bool saved_in_type_id_in_expr_p;
5515 cp_parser_parse_tentatively (parser);
5516 /* Consume the `('. */
5517 cp_lexer_consume_token (parser->lexer);
5518 /* Parse the type. */
5519 saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
5520 parser->in_type_id_in_expr_p = true;
5521 type = cp_parser_type_id (parser);
5522 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
5523 /* Look for the `)'. */
5524 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
5525 /* Look for the `{'. */
5526 cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE);
5527 /* If things aren't going well, there's no need to
5529 if (!cp_parser_error_occurred (parser))
5531 bool non_constant_p;
5532 /* Parse the initializer-list. */
5534 = cp_parser_initializer_list (parser, &non_constant_p);
5535 /* Allow a trailing `,'. */
5536 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
5537 cp_lexer_consume_token (parser->lexer);
5538 /* Look for the final `}'. */
5539 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
5541 /* If that worked, we're definitely looking at a
5542 compound-literal expression. */
5543 if (cp_parser_parse_definitely (parser))
5545 /* Warn the user that a compound literal is not
5546 allowed in standard C++. */
5547 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids compound-literals");
5548 /* For simplicity, we disallow compound literals in
5549 constant-expressions. We could
5550 allow compound literals of integer type, whose
5551 initializer was a constant, in constant
5552 expressions. Permitting that usage, as a further
5553 extension, would not change the meaning of any
5554 currently accepted programs. (Of course, as
5555 compound literals are not part of ISO C++, the
5556 standard has nothing to say.) */
5557 if (cp_parser_non_integral_constant_expression (parser,
5560 postfix_expression = error_mark_node;
5563 /* Form the representation of the compound-literal. */
5565 = (finish_compound_literal
5566 (type, build_constructor (init_list_type_node,
5568 tf_warning_or_error));
5573 /* It must be a primary-expression. */
5575 = cp_parser_primary_expression (parser, address_p, cast_p,
5576 /*template_arg_p=*/false,
5582 /* Keep looping until the postfix-expression is complete. */
5585 if (idk == CP_ID_KIND_UNQUALIFIED
5586 && TREE_CODE (postfix_expression) == IDENTIFIER_NODE
5587 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_PAREN))
5588 /* It is not a Koenig lookup function call. */
5590 = unqualified_name_lookup_error (postfix_expression);
5592 /* Peek at the next token. */
5593 token = cp_lexer_peek_token (parser->lexer);
5595 switch (token->type)
5597 case CPP_OPEN_SQUARE:
5599 = cp_parser_postfix_open_square_expression (parser,
5602 idk = CP_ID_KIND_NONE;
5603 is_member_access = false;
5606 case CPP_OPEN_PAREN:
5607 /* postfix-expression ( expression-list [opt] ) */
5610 bool is_builtin_constant_p;
5611 bool saved_integral_constant_expression_p = false;
5612 bool saved_non_integral_constant_expression_p = false;
5615 is_member_access = false;
5617 is_builtin_constant_p
5618 = DECL_IS_BUILTIN_CONSTANT_P (postfix_expression);
5619 if (is_builtin_constant_p)
5621 /* The whole point of __builtin_constant_p is to allow
5622 non-constant expressions to appear as arguments. */
5623 saved_integral_constant_expression_p
5624 = parser->integral_constant_expression_p;
5625 saved_non_integral_constant_expression_p
5626 = parser->non_integral_constant_expression_p;
5627 parser->integral_constant_expression_p = false;
5629 args = (cp_parser_parenthesized_expression_list
5631 /*cast_p=*/false, /*allow_expansion_p=*/true,
5632 /*non_constant_p=*/NULL));
5633 if (is_builtin_constant_p)
5635 parser->integral_constant_expression_p
5636 = saved_integral_constant_expression_p;
5637 parser->non_integral_constant_expression_p
5638 = saved_non_integral_constant_expression_p;
5643 postfix_expression = error_mark_node;
5647 /* Function calls are not permitted in
5648 constant-expressions. */
5649 if (! builtin_valid_in_constant_expr_p (postfix_expression)
5650 && cp_parser_non_integral_constant_expression (parser,
5653 postfix_expression = error_mark_node;
5654 release_tree_vector (args);
5659 if (idk == CP_ID_KIND_UNQUALIFIED
5660 || idk == CP_ID_KIND_TEMPLATE_ID)
5662 if (TREE_CODE (postfix_expression) == IDENTIFIER_NODE)
5664 if (!VEC_empty (tree, args))
5667 if (!any_type_dependent_arguments_p (args))
5669 = perform_koenig_lookup (postfix_expression, args,
5670 /*include_std=*/false,
5671 tf_warning_or_error);
5675 = unqualified_fn_lookup_error (postfix_expression);
5677 /* We do not perform argument-dependent lookup if
5678 normal lookup finds a non-function, in accordance
5679 with the expected resolution of DR 218. */
5680 else if (!VEC_empty (tree, args)
5681 && is_overloaded_fn (postfix_expression))
5683 tree fn = get_first_fn (postfix_expression);
5684 fn = STRIP_TEMPLATE (fn);
5686 /* Do not do argument dependent lookup if regular
5687 lookup finds a member function or a block-scope
5688 function declaration. [basic.lookup.argdep]/3 */
5689 if (!DECL_FUNCTION_MEMBER_P (fn)
5690 && !DECL_LOCAL_FUNCTION_P (fn))
5693 if (!any_type_dependent_arguments_p (args))
5695 = perform_koenig_lookup (postfix_expression, args,
5696 /*include_std=*/false,
5697 tf_warning_or_error);
5702 if (TREE_CODE (postfix_expression) == COMPONENT_REF)
5704 tree instance = TREE_OPERAND (postfix_expression, 0);
5705 tree fn = TREE_OPERAND (postfix_expression, 1);
5707 if (processing_template_decl
5708 && (type_dependent_expression_p (instance)
5709 || (!BASELINK_P (fn)
5710 && TREE_CODE (fn) != FIELD_DECL)
5711 || type_dependent_expression_p (fn)
5712 || any_type_dependent_arguments_p (args)))
5715 = build_nt_call_vec (postfix_expression, args);
5716 release_tree_vector (args);
5720 if (BASELINK_P (fn))
5723 = (build_new_method_call
5724 (instance, fn, &args, NULL_TREE,
5725 (idk == CP_ID_KIND_QUALIFIED
5726 ? LOOKUP_NORMAL|LOOKUP_NONVIRTUAL
5729 tf_warning_or_error));
5733 = finish_call_expr (postfix_expression, &args,
5734 /*disallow_virtual=*/false,
5736 tf_warning_or_error);
5738 else if (TREE_CODE (postfix_expression) == OFFSET_REF
5739 || TREE_CODE (postfix_expression) == MEMBER_REF
5740 || TREE_CODE (postfix_expression) == DOTSTAR_EXPR)
5741 postfix_expression = (build_offset_ref_call_from_tree
5742 (postfix_expression, &args));
5743 else if (idk == CP_ID_KIND_QUALIFIED)
5744 /* A call to a static class member, or a namespace-scope
5747 = finish_call_expr (postfix_expression, &args,
5748 /*disallow_virtual=*/true,
5750 tf_warning_or_error);
5752 /* All other function calls. */
5754 = finish_call_expr (postfix_expression, &args,
5755 /*disallow_virtual=*/false,
5757 tf_warning_or_error);
5759 /* The POSTFIX_EXPRESSION is certainly no longer an id. */
5760 idk = CP_ID_KIND_NONE;
5762 release_tree_vector (args);
5768 /* postfix-expression . template [opt] id-expression
5769 postfix-expression . pseudo-destructor-name
5770 postfix-expression -> template [opt] id-expression
5771 postfix-expression -> pseudo-destructor-name */
5773 /* Consume the `.' or `->' operator. */
5774 cp_lexer_consume_token (parser->lexer);
5777 = cp_parser_postfix_dot_deref_expression (parser, token->type,
5782 is_member_access = true;
5786 /* postfix-expression ++ */
5787 /* Consume the `++' token. */
5788 cp_lexer_consume_token (parser->lexer);
5789 /* Generate a representation for the complete expression. */
5791 = finish_increment_expr (postfix_expression,
5792 POSTINCREMENT_EXPR);
5793 /* Increments may not appear in constant-expressions. */
5794 if (cp_parser_non_integral_constant_expression (parser, NIC_INC))
5795 postfix_expression = error_mark_node;
5796 idk = CP_ID_KIND_NONE;
5797 is_member_access = false;
5800 case CPP_MINUS_MINUS:
5801 /* postfix-expression -- */
5802 /* Consume the `--' token. */
5803 cp_lexer_consume_token (parser->lexer);
5804 /* Generate a representation for the complete expression. */
5806 = finish_increment_expr (postfix_expression,
5807 POSTDECREMENT_EXPR);
5808 /* Decrements may not appear in constant-expressions. */
5809 if (cp_parser_non_integral_constant_expression (parser, NIC_DEC))
5810 postfix_expression = error_mark_node;
5811 idk = CP_ID_KIND_NONE;
5812 is_member_access = false;
5816 if (pidk_return != NULL)
5817 * pidk_return = idk;
5818 if (member_access_only_p)
5819 return is_member_access? postfix_expression : error_mark_node;
5821 return postfix_expression;
5825 /* We should never get here. */
5827 return error_mark_node;
5830 /* A subroutine of cp_parser_postfix_expression that also gets hijacked
5831 by cp_parser_builtin_offsetof. We're looking for
5833 postfix-expression [ expression ]
5834 postfix-expression [ braced-init-list ] (C++11)
5836 FOR_OFFSETOF is set if we're being called in that context, which
5837 changes how we deal with integer constant expressions. */
5840 cp_parser_postfix_open_square_expression (cp_parser *parser,
5841 tree postfix_expression,
5846 /* Consume the `[' token. */
5847 cp_lexer_consume_token (parser->lexer);
5849 /* Parse the index expression. */
5850 /* ??? For offsetof, there is a question of what to allow here. If
5851 offsetof is not being used in an integral constant expression context,
5852 then we *could* get the right answer by computing the value at runtime.
5853 If we are in an integral constant expression context, then we might
5854 could accept any constant expression; hard to say without analysis.
5855 Rather than open the barn door too wide right away, allow only integer
5856 constant expressions here. */
5858 index = cp_parser_constant_expression (parser, false, NULL);
5861 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
5863 bool expr_nonconst_p;
5864 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5865 index = cp_parser_braced_list (parser, &expr_nonconst_p);
5868 index = cp_parser_expression (parser, /*cast_p=*/false, NULL);
5871 /* Look for the closing `]'. */
5872 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
5874 /* Build the ARRAY_REF. */
5875 postfix_expression = grok_array_decl (postfix_expression, index);
5877 /* When not doing offsetof, array references are not permitted in
5878 constant-expressions. */
5880 && (cp_parser_non_integral_constant_expression (parser, NIC_ARRAY_REF)))
5881 postfix_expression = error_mark_node;
5883 return postfix_expression;
5886 /* A subroutine of cp_parser_postfix_expression that also gets hijacked
5887 by cp_parser_builtin_offsetof. We're looking for
5889 postfix-expression . template [opt] id-expression
5890 postfix-expression . pseudo-destructor-name
5891 postfix-expression -> template [opt] id-expression
5892 postfix-expression -> pseudo-destructor-name
5894 FOR_OFFSETOF is set if we're being called in that context. That sorta
5895 limits what of the above we'll actually accept, but nevermind.
5896 TOKEN_TYPE is the "." or "->" token, which will already have been
5897 removed from the stream. */
5900 cp_parser_postfix_dot_deref_expression (cp_parser *parser,
5901 enum cpp_ttype token_type,
5902 tree postfix_expression,
5903 bool for_offsetof, cp_id_kind *idk,
5904 location_t location)
5908 bool pseudo_destructor_p;
5909 tree scope = NULL_TREE;
5911 /* If this is a `->' operator, dereference the pointer. */
5912 if (token_type == CPP_DEREF)
5913 postfix_expression = build_x_arrow (postfix_expression);
5914 /* Check to see whether or not the expression is type-dependent. */
5915 dependent_p = type_dependent_expression_p (postfix_expression);
5916 /* The identifier following the `->' or `.' is not qualified. */
5917 parser->scope = NULL_TREE;
5918 parser->qualifying_scope = NULL_TREE;
5919 parser->object_scope = NULL_TREE;
5920 *idk = CP_ID_KIND_NONE;
5922 /* Enter the scope corresponding to the type of the object
5923 given by the POSTFIX_EXPRESSION. */
5924 if (!dependent_p && TREE_TYPE (postfix_expression) != NULL_TREE)
5926 scope = TREE_TYPE (postfix_expression);
5927 /* According to the standard, no expression should ever have
5928 reference type. Unfortunately, we do not currently match
5929 the standard in this respect in that our internal representation
5930 of an expression may have reference type even when the standard
5931 says it does not. Therefore, we have to manually obtain the
5932 underlying type here. */
5933 scope = non_reference (scope);
5934 /* The type of the POSTFIX_EXPRESSION must be complete. */
5935 if (scope == unknown_type_node)
5937 error_at (location, "%qE does not have class type",
5938 postfix_expression);
5941 /* Unlike the object expression in other contexts, *this is not
5942 required to be of complete type for purposes of class member
5943 access (5.2.5) outside the member function body. */
5944 else if (scope != current_class_ref
5945 && !(processing_template_decl && scope == current_class_type))
5946 scope = complete_type_or_else (scope, NULL_TREE);
5947 /* Let the name lookup machinery know that we are processing a
5948 class member access expression. */
5949 parser->context->object_type = scope;
5950 /* If something went wrong, we want to be able to discern that case,
5951 as opposed to the case where there was no SCOPE due to the type
5952 of expression being dependent. */
5954 scope = error_mark_node;
5955 /* If the SCOPE was erroneous, make the various semantic analysis
5956 functions exit quickly -- and without issuing additional error
5958 if (scope == error_mark_node)
5959 postfix_expression = error_mark_node;
5962 /* Assume this expression is not a pseudo-destructor access. */
5963 pseudo_destructor_p = false;
5965 /* If the SCOPE is a scalar type, then, if this is a valid program,
5966 we must be looking at a pseudo-destructor-name. If POSTFIX_EXPRESSION
5967 is type dependent, it can be pseudo-destructor-name or something else.
5968 Try to parse it as pseudo-destructor-name first. */
5969 if ((scope && SCALAR_TYPE_P (scope)) || dependent_p)
5974 cp_parser_parse_tentatively (parser);
5975 /* Parse the pseudo-destructor-name. */
5977 cp_parser_pseudo_destructor_name (parser, &s, &type);
5979 && (cp_parser_error_occurred (parser)
5980 || TREE_CODE (type) != TYPE_DECL
5981 || !SCALAR_TYPE_P (TREE_TYPE (type))))
5982 cp_parser_abort_tentative_parse (parser);
5983 else if (cp_parser_parse_definitely (parser))
5985 pseudo_destructor_p = true;
5987 = finish_pseudo_destructor_expr (postfix_expression,
5988 s, TREE_TYPE (type));
5992 if (!pseudo_destructor_p)
5994 /* If the SCOPE is not a scalar type, we are looking at an
5995 ordinary class member access expression, rather than a
5996 pseudo-destructor-name. */
5998 cp_token *token = cp_lexer_peek_token (parser->lexer);
5999 /* Parse the id-expression. */
6000 name = (cp_parser_id_expression
6002 cp_parser_optional_template_keyword (parser),
6003 /*check_dependency_p=*/true,
6005 /*declarator_p=*/false,
6006 /*optional_p=*/false));
6007 /* In general, build a SCOPE_REF if the member name is qualified.
6008 However, if the name was not dependent and has already been
6009 resolved; there is no need to build the SCOPE_REF. For example;
6011 struct X { void f(); };
6012 template <typename T> void f(T* t) { t->X::f(); }
6014 Even though "t" is dependent, "X::f" is not and has been resolved
6015 to a BASELINK; there is no need to include scope information. */
6017 /* But we do need to remember that there was an explicit scope for
6018 virtual function calls. */
6020 *idk = CP_ID_KIND_QUALIFIED;
6022 /* If the name is a template-id that names a type, we will get a
6023 TYPE_DECL here. That is invalid code. */
6024 if (TREE_CODE (name) == TYPE_DECL)
6026 error_at (token->location, "invalid use of %qD", name);
6027 postfix_expression = error_mark_node;
6031 if (name != error_mark_node && !BASELINK_P (name) && parser->scope)
6033 if (TREE_CODE (parser->scope) == NAMESPACE_DECL)
6035 error_at (token->location, "%<%D::%D%> is not a class member",
6036 parser->scope, name);
6037 postfix_expression = error_mark_node;
6040 name = build_qualified_name (/*type=*/NULL_TREE,
6044 parser->scope = NULL_TREE;
6045 parser->qualifying_scope = NULL_TREE;
6046 parser->object_scope = NULL_TREE;
6048 if (parser->scope && name && BASELINK_P (name))
6049 adjust_result_of_qualified_name_lookup
6050 (name, parser->scope, scope);
6052 = finish_class_member_access_expr (postfix_expression, name,
6054 tf_warning_or_error);
6058 /* We no longer need to look up names in the scope of the object on
6059 the left-hand side of the `.' or `->' operator. */
6060 parser->context->object_type = NULL_TREE;
6062 /* Outside of offsetof, these operators may not appear in
6063 constant-expressions. */
6065 && (cp_parser_non_integral_constant_expression
6066 (parser, token_type == CPP_DEREF ? NIC_ARROW : NIC_POINT)))
6067 postfix_expression = error_mark_node;
6069 return postfix_expression;
6072 /* Parse a parenthesized expression-list.
6075 assignment-expression
6076 expression-list, assignment-expression
6081 identifier, expression-list
6083 CAST_P is true if this expression is the target of a cast.
6085 ALLOW_EXPANSION_P is true if this expression allows expansion of an
6088 Returns a vector of trees. Each element is a representation of an
6089 assignment-expression. NULL is returned if the ( and or ) are
6090 missing. An empty, but allocated, vector is returned on no
6091 expressions. The parentheses are eaten. IS_ATTRIBUTE_LIST is id_attr
6092 if we are parsing an attribute list for an attribute that wants a
6093 plain identifier argument, normal_attr for an attribute that wants
6094 an expression, or non_attr if we aren't parsing an attribute list. If
6095 NON_CONSTANT_P is non-NULL, *NON_CONSTANT_P indicates whether or
6096 not all of the expressions in the list were constant. */
6098 static VEC(tree,gc) *
6099 cp_parser_parenthesized_expression_list (cp_parser* parser,
6100 int is_attribute_list,
6102 bool allow_expansion_p,
6103 bool *non_constant_p)
6105 VEC(tree,gc) *expression_list;
6106 bool fold_expr_p = is_attribute_list != non_attr;
6107 tree identifier = NULL_TREE;
6108 bool saved_greater_than_is_operator_p;
6110 /* Assume all the expressions will be constant. */
6112 *non_constant_p = false;
6114 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
6117 expression_list = make_tree_vector ();
6119 /* Within a parenthesized expression, a `>' token is always
6120 the greater-than operator. */
6121 saved_greater_than_is_operator_p
6122 = parser->greater_than_is_operator_p;
6123 parser->greater_than_is_operator_p = true;
6125 /* Consume expressions until there are no more. */
6126 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN))
6131 /* At the beginning of attribute lists, check to see if the
6132 next token is an identifier. */
6133 if (is_attribute_list == id_attr
6134 && cp_lexer_peek_token (parser->lexer)->type == CPP_NAME)
6138 /* Consume the identifier. */
6139 token = cp_lexer_consume_token (parser->lexer);
6140 /* Save the identifier. */
6141 identifier = token->u.value;
6145 bool expr_non_constant_p;
6147 /* Parse the next assignment-expression. */
6148 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
6150 /* A braced-init-list. */
6151 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
6152 expr = cp_parser_braced_list (parser, &expr_non_constant_p);
6153 if (non_constant_p && expr_non_constant_p)
6154 *non_constant_p = true;
6156 else if (non_constant_p)
6158 expr = (cp_parser_constant_expression
6159 (parser, /*allow_non_constant_p=*/true,
6160 &expr_non_constant_p));
6161 if (expr_non_constant_p)
6162 *non_constant_p = true;
6165 expr = cp_parser_assignment_expression (parser, cast_p, NULL);
6168 expr = fold_non_dependent_expr (expr);
6170 /* If we have an ellipsis, then this is an expression
6172 if (allow_expansion_p
6173 && cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
6175 /* Consume the `...'. */
6176 cp_lexer_consume_token (parser->lexer);
6178 /* Build the argument pack. */
6179 expr = make_pack_expansion (expr);
6182 /* Add it to the list. We add error_mark_node
6183 expressions to the list, so that we can still tell if
6184 the correct form for a parenthesized expression-list
6185 is found. That gives better errors. */
6186 VEC_safe_push (tree, gc, expression_list, expr);
6188 if (expr == error_mark_node)
6192 /* After the first item, attribute lists look the same as
6193 expression lists. */
6194 is_attribute_list = non_attr;
6197 /* If the next token isn't a `,', then we are done. */
6198 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
6201 /* Otherwise, consume the `,' and keep going. */
6202 cp_lexer_consume_token (parser->lexer);
6205 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
6210 /* We try and resync to an unnested comma, as that will give the
6211 user better diagnostics. */
6212 ending = cp_parser_skip_to_closing_parenthesis (parser,
6213 /*recovering=*/true,
6215 /*consume_paren=*/true);
6220 parser->greater_than_is_operator_p
6221 = saved_greater_than_is_operator_p;
6226 parser->greater_than_is_operator_p
6227 = saved_greater_than_is_operator_p;
6230 VEC_safe_insert (tree, gc, expression_list, 0, identifier);
6232 return expression_list;
6235 /* Parse a pseudo-destructor-name.
6237 pseudo-destructor-name:
6238 :: [opt] nested-name-specifier [opt] type-name :: ~ type-name
6239 :: [opt] nested-name-specifier template template-id :: ~ type-name
6240 :: [opt] nested-name-specifier [opt] ~ type-name
6242 If either of the first two productions is used, sets *SCOPE to the
6243 TYPE specified before the final `::'. Otherwise, *SCOPE is set to
6244 NULL_TREE. *TYPE is set to the TYPE_DECL for the final type-name,
6245 or ERROR_MARK_NODE if the parse fails. */
6248 cp_parser_pseudo_destructor_name (cp_parser* parser,
6252 bool nested_name_specifier_p;
6254 /* Assume that things will not work out. */
6255 *type = error_mark_node;
6257 /* Look for the optional `::' operator. */
6258 cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/true);
6259 /* Look for the optional nested-name-specifier. */
6260 nested_name_specifier_p
6261 = (cp_parser_nested_name_specifier_opt (parser,
6262 /*typename_keyword_p=*/false,
6263 /*check_dependency_p=*/true,
6265 /*is_declaration=*/false)
6267 /* Now, if we saw a nested-name-specifier, we might be doing the
6268 second production. */
6269 if (nested_name_specifier_p
6270 && cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
6272 /* Consume the `template' keyword. */
6273 cp_lexer_consume_token (parser->lexer);
6274 /* Parse the template-id. */
6275 cp_parser_template_id (parser,
6276 /*template_keyword_p=*/true,
6277 /*check_dependency_p=*/false,
6278 /*is_declaration=*/true);
6279 /* Look for the `::' token. */
6280 cp_parser_require (parser, CPP_SCOPE, RT_SCOPE);
6282 /* If the next token is not a `~', then there might be some
6283 additional qualification. */
6284 else if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMPL))
6286 /* At this point, we're looking for "type-name :: ~". The type-name
6287 must not be a class-name, since this is a pseudo-destructor. So,
6288 it must be either an enum-name, or a typedef-name -- both of which
6289 are just identifiers. So, we peek ahead to check that the "::"
6290 and "~" tokens are present; if they are not, then we can avoid
6291 calling type_name. */
6292 if (cp_lexer_peek_token (parser->lexer)->type != CPP_NAME
6293 || cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_SCOPE
6294 || cp_lexer_peek_nth_token (parser->lexer, 3)->type != CPP_COMPL)
6296 cp_parser_error (parser, "non-scalar type");
6300 /* Look for the type-name. */
6301 *scope = TREE_TYPE (cp_parser_nonclass_name (parser));
6302 if (*scope == error_mark_node)
6305 /* Look for the `::' token. */
6306 cp_parser_require (parser, CPP_SCOPE, RT_SCOPE);
6311 /* Look for the `~'. */
6312 cp_parser_require (parser, CPP_COMPL, RT_COMPL);
6314 /* Once we see the ~, this has to be a pseudo-destructor. */
6315 if (!processing_template_decl && !cp_parser_error_occurred (parser))
6316 cp_parser_commit_to_tentative_parse (parser);
6318 /* Look for the type-name again. We are not responsible for
6319 checking that it matches the first type-name. */
6320 *type = cp_parser_nonclass_name (parser);
6323 /* Parse a unary-expression.
6329 unary-operator cast-expression
6330 sizeof unary-expression
6332 alignof ( type-id ) [C++0x]
6339 __extension__ cast-expression
6340 __alignof__ unary-expression
6341 __alignof__ ( type-id )
6342 alignof unary-expression [C++0x]
6343 __real__ cast-expression
6344 __imag__ cast-expression
6347 ADDRESS_P is true iff the unary-expression is appearing as the
6348 operand of the `&' operator. CAST_P is true if this expression is
6349 the target of a cast.
6351 Returns a representation of the expression. */
6354 cp_parser_unary_expression (cp_parser *parser, bool address_p, bool cast_p,
6358 enum tree_code unary_operator;
6360 /* Peek at the next token. */
6361 token = cp_lexer_peek_token (parser->lexer);
6362 /* Some keywords give away the kind of expression. */
6363 if (token->type == CPP_KEYWORD)
6365 enum rid keyword = token->keyword;
6375 op = keyword == RID_ALIGNOF ? ALIGNOF_EXPR : SIZEOF_EXPR;
6376 /* Consume the token. */
6377 cp_lexer_consume_token (parser->lexer);
6378 /* Parse the operand. */
6379 operand = cp_parser_sizeof_operand (parser, keyword);
6381 if (TYPE_P (operand))
6382 return cxx_sizeof_or_alignof_type (operand, op, true);
6385 /* ISO C++ defines alignof only with types, not with
6386 expressions. So pedwarn if alignof is used with a non-
6387 type expression. However, __alignof__ is ok. */
6388 if (!strcmp (IDENTIFIER_POINTER (token->u.value), "alignof"))
6389 pedwarn (token->location, OPT_pedantic,
6390 "ISO C++ does not allow %<alignof%> "
6393 return cxx_sizeof_or_alignof_expr (operand, op, true);
6398 return cp_parser_new_expression (parser);
6401 return cp_parser_delete_expression (parser);
6405 /* The saved value of the PEDANTIC flag. */
6409 /* Save away the PEDANTIC flag. */
6410 cp_parser_extension_opt (parser, &saved_pedantic);
6411 /* Parse the cast-expression. */
6412 expr = cp_parser_simple_cast_expression (parser);
6413 /* Restore the PEDANTIC flag. */
6414 pedantic = saved_pedantic;
6424 /* Consume the `__real__' or `__imag__' token. */
6425 cp_lexer_consume_token (parser->lexer);
6426 /* Parse the cast-expression. */
6427 expression = cp_parser_simple_cast_expression (parser);
6428 /* Create the complete representation. */
6429 return build_x_unary_op ((keyword == RID_REALPART
6430 ? REALPART_EXPR : IMAGPART_EXPR),
6432 tf_warning_or_error);
6436 case RID_TRANSACTION_ATOMIC:
6437 case RID_TRANSACTION_RELAXED:
6438 return cp_parser_transaction_expression (parser, keyword);
6443 const char *saved_message;
6444 bool saved_integral_constant_expression_p;
6445 bool saved_non_integral_constant_expression_p;
6446 bool saved_greater_than_is_operator_p;
6448 cp_lexer_consume_token (parser->lexer);
6449 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
6451 saved_message = parser->type_definition_forbidden_message;
6452 parser->type_definition_forbidden_message
6453 = G_("types may not be defined in %<noexcept%> expressions");
6455 saved_integral_constant_expression_p
6456 = parser->integral_constant_expression_p;
6457 saved_non_integral_constant_expression_p
6458 = parser->non_integral_constant_expression_p;
6459 parser->integral_constant_expression_p = false;
6461 saved_greater_than_is_operator_p
6462 = parser->greater_than_is_operator_p;
6463 parser->greater_than_is_operator_p = true;
6465 ++cp_unevaluated_operand;
6466 ++c_inhibit_evaluation_warnings;
6467 expr = cp_parser_expression (parser, false, NULL);
6468 --c_inhibit_evaluation_warnings;
6469 --cp_unevaluated_operand;
6471 parser->greater_than_is_operator_p
6472 = saved_greater_than_is_operator_p;
6474 parser->integral_constant_expression_p
6475 = saved_integral_constant_expression_p;
6476 parser->non_integral_constant_expression_p
6477 = saved_non_integral_constant_expression_p;
6479 parser->type_definition_forbidden_message = saved_message;
6481 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
6482 return finish_noexcept_expr (expr, tf_warning_or_error);
6490 /* Look for the `:: new' and `:: delete', which also signal the
6491 beginning of a new-expression, or delete-expression,
6492 respectively. If the next token is `::', then it might be one of
6494 if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
6498 /* See if the token after the `::' is one of the keywords in
6499 which we're interested. */
6500 keyword = cp_lexer_peek_nth_token (parser->lexer, 2)->keyword;
6501 /* If it's `new', we have a new-expression. */
6502 if (keyword == RID_NEW)
6503 return cp_parser_new_expression (parser);
6504 /* Similarly, for `delete'. */
6505 else if (keyword == RID_DELETE)
6506 return cp_parser_delete_expression (parser);
6509 /* Look for a unary operator. */
6510 unary_operator = cp_parser_unary_operator (token);
6511 /* The `++' and `--' operators can be handled similarly, even though
6512 they are not technically unary-operators in the grammar. */
6513 if (unary_operator == ERROR_MARK)
6515 if (token->type == CPP_PLUS_PLUS)
6516 unary_operator = PREINCREMENT_EXPR;
6517 else if (token->type == CPP_MINUS_MINUS)
6518 unary_operator = PREDECREMENT_EXPR;
6519 /* Handle the GNU address-of-label extension. */
6520 else if (cp_parser_allow_gnu_extensions_p (parser)
6521 && token->type == CPP_AND_AND)
6525 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
6527 /* Consume the '&&' token. */
6528 cp_lexer_consume_token (parser->lexer);
6529 /* Look for the identifier. */
6530 identifier = cp_parser_identifier (parser);
6531 /* Create an expression representing the address. */
6532 expression = finish_label_address_expr (identifier, loc);
6533 if (cp_parser_non_integral_constant_expression (parser,
6535 expression = error_mark_node;
6539 if (unary_operator != ERROR_MARK)
6541 tree cast_expression;
6542 tree expression = error_mark_node;
6543 non_integral_constant non_constant_p = NIC_NONE;
6545 /* Consume the operator token. */
6546 token = cp_lexer_consume_token (parser->lexer);
6547 /* Parse the cast-expression. */
6549 = cp_parser_cast_expression (parser,
6550 unary_operator == ADDR_EXPR,
6551 /*cast_p=*/false, pidk);
6552 /* Now, build an appropriate representation. */
6553 switch (unary_operator)
6556 non_constant_p = NIC_STAR;
6557 expression = build_x_indirect_ref (cast_expression, RO_UNARY_STAR,
6558 tf_warning_or_error);
6562 non_constant_p = NIC_ADDR;
6565 expression = build_x_unary_op (unary_operator, cast_expression,
6566 tf_warning_or_error);
6569 case PREINCREMENT_EXPR:
6570 case PREDECREMENT_EXPR:
6571 non_constant_p = unary_operator == PREINCREMENT_EXPR
6572 ? NIC_PREINCREMENT : NIC_PREDECREMENT;
6574 case UNARY_PLUS_EXPR:
6576 case TRUTH_NOT_EXPR:
6577 expression = finish_unary_op_expr (unary_operator, cast_expression);
6584 if (non_constant_p != NIC_NONE
6585 && cp_parser_non_integral_constant_expression (parser,
6587 expression = error_mark_node;
6592 return cp_parser_postfix_expression (parser, address_p, cast_p,
6593 /*member_access_only_p=*/false,
6597 /* Returns ERROR_MARK if TOKEN is not a unary-operator. If TOKEN is a
6598 unary-operator, the corresponding tree code is returned. */
6600 static enum tree_code
6601 cp_parser_unary_operator (cp_token* token)
6603 switch (token->type)
6606 return INDIRECT_REF;
6612 return UNARY_PLUS_EXPR;
6618 return TRUTH_NOT_EXPR;
6621 return BIT_NOT_EXPR;
6628 /* Parse a new-expression.
6631 :: [opt] new new-placement [opt] new-type-id new-initializer [opt]
6632 :: [opt] new new-placement [opt] ( type-id ) new-initializer [opt]
6634 Returns a representation of the expression. */
6637 cp_parser_new_expression (cp_parser* parser)
6639 bool global_scope_p;
6640 VEC(tree,gc) *placement;
6642 VEC(tree,gc) *initializer;
6646 /* Look for the optional `::' operator. */
6648 = (cp_parser_global_scope_opt (parser,
6649 /*current_scope_valid_p=*/false)
6651 /* Look for the `new' operator. */
6652 cp_parser_require_keyword (parser, RID_NEW, RT_NEW);
6653 /* There's no easy way to tell a new-placement from the
6654 `( type-id )' construct. */
6655 cp_parser_parse_tentatively (parser);
6656 /* Look for a new-placement. */
6657 placement = cp_parser_new_placement (parser);
6658 /* If that didn't work out, there's no new-placement. */
6659 if (!cp_parser_parse_definitely (parser))
6661 if (placement != NULL)
6662 release_tree_vector (placement);
6666 /* If the next token is a `(', then we have a parenthesized
6668 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
6671 const char *saved_message = parser->type_definition_forbidden_message;
6673 /* Consume the `('. */
6674 cp_lexer_consume_token (parser->lexer);
6676 /* Parse the type-id. */
6677 parser->type_definition_forbidden_message
6678 = G_("types may not be defined in a new-expression");
6679 type = cp_parser_type_id (parser);
6680 parser->type_definition_forbidden_message = saved_message;
6682 /* Look for the closing `)'. */
6683 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
6684 token = cp_lexer_peek_token (parser->lexer);
6685 /* There should not be a direct-new-declarator in this production,
6686 but GCC used to allowed this, so we check and emit a sensible error
6687 message for this case. */
6688 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
6690 error_at (token->location,
6691 "array bound forbidden after parenthesized type-id");
6692 inform (token->location,
6693 "try removing the parentheses around the type-id");
6694 cp_parser_direct_new_declarator (parser);
6698 /* Otherwise, there must be a new-type-id. */
6700 type = cp_parser_new_type_id (parser, &nelts);
6702 /* If the next token is a `(' or '{', then we have a new-initializer. */
6703 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN)
6704 || cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
6705 initializer = cp_parser_new_initializer (parser);
6709 /* A new-expression may not appear in an integral constant
6711 if (cp_parser_non_integral_constant_expression (parser, NIC_NEW))
6712 ret = error_mark_node;
6715 /* Create a representation of the new-expression. */
6716 ret = build_new (&placement, type, nelts, &initializer, global_scope_p,
6717 tf_warning_or_error);
6720 if (placement != NULL)
6721 release_tree_vector (placement);
6722 if (initializer != NULL)
6723 release_tree_vector (initializer);
6728 /* Parse a new-placement.
6733 Returns the same representation as for an expression-list. */
6735 static VEC(tree,gc) *
6736 cp_parser_new_placement (cp_parser* parser)
6738 VEC(tree,gc) *expression_list;
6740 /* Parse the expression-list. */
6741 expression_list = (cp_parser_parenthesized_expression_list
6742 (parser, non_attr, /*cast_p=*/false,
6743 /*allow_expansion_p=*/true,
6744 /*non_constant_p=*/NULL));
6746 return expression_list;
6749 /* Parse a new-type-id.
6752 type-specifier-seq new-declarator [opt]
6754 Returns the TYPE allocated. If the new-type-id indicates an array
6755 type, *NELTS is set to the number of elements in the last array
6756 bound; the TYPE will not include the last array bound. */
6759 cp_parser_new_type_id (cp_parser* parser, tree *nelts)
6761 cp_decl_specifier_seq type_specifier_seq;
6762 cp_declarator *new_declarator;
6763 cp_declarator *declarator;
6764 cp_declarator *outer_declarator;
6765 const char *saved_message;
6768 /* The type-specifier sequence must not contain type definitions.
6769 (It cannot contain declarations of new types either, but if they
6770 are not definitions we will catch that because they are not
6772 saved_message = parser->type_definition_forbidden_message;
6773 parser->type_definition_forbidden_message
6774 = G_("types may not be defined in a new-type-id");
6775 /* Parse the type-specifier-seq. */
6776 cp_parser_type_specifier_seq (parser, /*is_declaration=*/false,
6777 /*is_trailing_return=*/false,
6778 &type_specifier_seq);
6779 /* Restore the old message. */
6780 parser->type_definition_forbidden_message = saved_message;
6781 /* Parse the new-declarator. */
6782 new_declarator = cp_parser_new_declarator_opt (parser);
6784 /* Determine the number of elements in the last array dimension, if
6787 /* Skip down to the last array dimension. */
6788 declarator = new_declarator;
6789 outer_declarator = NULL;
6790 while (declarator && (declarator->kind == cdk_pointer
6791 || declarator->kind == cdk_ptrmem))
6793 outer_declarator = declarator;
6794 declarator = declarator->declarator;
6797 && declarator->kind == cdk_array
6798 && declarator->declarator
6799 && declarator->declarator->kind == cdk_array)
6801 outer_declarator = declarator;
6802 declarator = declarator->declarator;
6805 if (declarator && declarator->kind == cdk_array)
6807 *nelts = declarator->u.array.bounds;
6808 if (*nelts == error_mark_node)
6809 *nelts = integer_one_node;
6811 if (outer_declarator)
6812 outer_declarator->declarator = declarator->declarator;
6814 new_declarator = NULL;
6817 type = groktypename (&type_specifier_seq, new_declarator, false);
6821 /* Parse an (optional) new-declarator.
6824 ptr-operator new-declarator [opt]
6825 direct-new-declarator
6827 Returns the declarator. */
6829 static cp_declarator *
6830 cp_parser_new_declarator_opt (cp_parser* parser)
6832 enum tree_code code;
6834 cp_cv_quals cv_quals;
6836 /* We don't know if there's a ptr-operator next, or not. */
6837 cp_parser_parse_tentatively (parser);
6838 /* Look for a ptr-operator. */
6839 code = cp_parser_ptr_operator (parser, &type, &cv_quals);
6840 /* If that worked, look for more new-declarators. */
6841 if (cp_parser_parse_definitely (parser))
6843 cp_declarator *declarator;
6845 /* Parse another optional declarator. */
6846 declarator = cp_parser_new_declarator_opt (parser);
6848 return cp_parser_make_indirect_declarator
6849 (code, type, cv_quals, declarator);
6852 /* If the next token is a `[', there is a direct-new-declarator. */
6853 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
6854 return cp_parser_direct_new_declarator (parser);
6859 /* Parse a direct-new-declarator.
6861 direct-new-declarator:
6863 direct-new-declarator [constant-expression]
6867 static cp_declarator *
6868 cp_parser_direct_new_declarator (cp_parser* parser)
6870 cp_declarator *declarator = NULL;
6876 /* Look for the opening `['. */
6877 cp_parser_require (parser, CPP_OPEN_SQUARE, RT_OPEN_SQUARE);
6878 /* The first expression is not required to be constant. */
6881 cp_token *token = cp_lexer_peek_token (parser->lexer);
6882 expression = cp_parser_expression (parser, /*cast_p=*/false, NULL);
6883 /* The standard requires that the expression have integral
6884 type. DR 74 adds enumeration types. We believe that the
6885 real intent is that these expressions be handled like the
6886 expression in a `switch' condition, which also allows
6887 classes with a single conversion to integral or
6888 enumeration type. */
6889 if (!processing_template_decl)
6892 = build_expr_type_conversion (WANT_INT | WANT_ENUM,
6897 error_at (token->location,
6898 "expression in new-declarator must have integral "
6899 "or enumeration type");
6900 expression = error_mark_node;
6904 /* But all the other expressions must be. */
6907 = cp_parser_constant_expression (parser,
6908 /*allow_non_constant=*/false,
6910 /* Look for the closing `]'. */
6911 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
6913 /* Add this bound to the declarator. */
6914 declarator = make_array_declarator (declarator, expression);
6916 /* If the next token is not a `[', then there are no more
6918 if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_SQUARE))
6925 /* Parse a new-initializer.
6928 ( expression-list [opt] )
6931 Returns a representation of the expression-list. */
6933 static VEC(tree,gc) *
6934 cp_parser_new_initializer (cp_parser* parser)
6936 VEC(tree,gc) *expression_list;
6938 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
6941 bool expr_non_constant_p;
6942 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
6943 t = cp_parser_braced_list (parser, &expr_non_constant_p);
6944 CONSTRUCTOR_IS_DIRECT_INIT (t) = 1;
6945 expression_list = make_tree_vector_single (t);
6948 expression_list = (cp_parser_parenthesized_expression_list
6949 (parser, non_attr, /*cast_p=*/false,
6950 /*allow_expansion_p=*/true,
6951 /*non_constant_p=*/NULL));
6953 return expression_list;
6956 /* Parse a delete-expression.
6959 :: [opt] delete cast-expression
6960 :: [opt] delete [ ] cast-expression
6962 Returns a representation of the expression. */
6965 cp_parser_delete_expression (cp_parser* parser)
6967 bool global_scope_p;
6971 /* Look for the optional `::' operator. */
6973 = (cp_parser_global_scope_opt (parser,
6974 /*current_scope_valid_p=*/false)
6976 /* Look for the `delete' keyword. */
6977 cp_parser_require_keyword (parser, RID_DELETE, RT_DELETE);
6978 /* See if the array syntax is in use. */
6979 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
6981 /* Consume the `[' token. */
6982 cp_lexer_consume_token (parser->lexer);
6983 /* Look for the `]' token. */
6984 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
6985 /* Remember that this is the `[]' construct. */
6991 /* Parse the cast-expression. */
6992 expression = cp_parser_simple_cast_expression (parser);
6994 /* A delete-expression may not appear in an integral constant
6996 if (cp_parser_non_integral_constant_expression (parser, NIC_DEL))
6997 return error_mark_node;
6999 return delete_sanity (expression, NULL_TREE, array_p, global_scope_p,
7000 tf_warning_or_error);
7003 /* Returns true if TOKEN may start a cast-expression and false
7007 cp_parser_token_starts_cast_expression (cp_token *token)
7009 switch (token->type)
7015 case CPP_CLOSE_SQUARE:
7016 case CPP_CLOSE_PAREN:
7017 case CPP_CLOSE_BRACE:
7021 case CPP_DEREF_STAR:
7029 case CPP_GREATER_EQ:
7049 /* '[' may start a primary-expression in obj-c++. */
7050 case CPP_OPEN_SQUARE:
7051 return c_dialect_objc ();
7058 /* Parse a cast-expression.
7062 ( type-id ) cast-expression
7064 ADDRESS_P is true iff the unary-expression is appearing as the
7065 operand of the `&' operator. CAST_P is true if this expression is
7066 the target of a cast.
7068 Returns a representation of the expression. */
7071 cp_parser_cast_expression (cp_parser *parser, bool address_p, bool cast_p,
7074 /* If it's a `(', then we might be looking at a cast. */
7075 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
7077 tree type = NULL_TREE;
7078 tree expr = NULL_TREE;
7079 bool compound_literal_p;
7080 const char *saved_message;
7082 /* There's no way to know yet whether or not this is a cast.
7083 For example, `(int (3))' is a unary-expression, while `(int)
7084 3' is a cast. So, we resort to parsing tentatively. */
7085 cp_parser_parse_tentatively (parser);
7086 /* Types may not be defined in a cast. */
7087 saved_message = parser->type_definition_forbidden_message;
7088 parser->type_definition_forbidden_message
7089 = G_("types may not be defined in casts");
7090 /* Consume the `('. */
7091 cp_lexer_consume_token (parser->lexer);
7092 /* A very tricky bit is that `(struct S) { 3 }' is a
7093 compound-literal (which we permit in C++ as an extension).
7094 But, that construct is not a cast-expression -- it is a
7095 postfix-expression. (The reason is that `(struct S) { 3 }.i'
7096 is legal; if the compound-literal were a cast-expression,
7097 you'd need an extra set of parentheses.) But, if we parse
7098 the type-id, and it happens to be a class-specifier, then we
7099 will commit to the parse at that point, because we cannot
7100 undo the action that is done when creating a new class. So,
7101 then we cannot back up and do a postfix-expression.
7103 Therefore, we scan ahead to the closing `)', and check to see
7104 if the token after the `)' is a `{'. If so, we are not
7105 looking at a cast-expression.
7107 Save tokens so that we can put them back. */
7108 cp_lexer_save_tokens (parser->lexer);
7109 /* Skip tokens until the next token is a closing parenthesis.
7110 If we find the closing `)', and the next token is a `{', then
7111 we are looking at a compound-literal. */
7113 = (cp_parser_skip_to_closing_parenthesis (parser, false, false,
7114 /*consume_paren=*/true)
7115 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE));
7116 /* Roll back the tokens we skipped. */
7117 cp_lexer_rollback_tokens (parser->lexer);
7118 /* If we were looking at a compound-literal, simulate an error
7119 so that the call to cp_parser_parse_definitely below will
7121 if (compound_literal_p)
7122 cp_parser_simulate_error (parser);
7125 bool saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
7126 parser->in_type_id_in_expr_p = true;
7127 /* Look for the type-id. */
7128 type = cp_parser_type_id (parser);
7129 /* Look for the closing `)'. */
7130 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
7131 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
7134 /* Restore the saved message. */
7135 parser->type_definition_forbidden_message = saved_message;
7137 /* At this point this can only be either a cast or a
7138 parenthesized ctor such as `(T ())' that looks like a cast to
7139 function returning T. */
7140 if (!cp_parser_error_occurred (parser)
7141 && cp_parser_token_starts_cast_expression (cp_lexer_peek_token
7144 cp_parser_parse_definitely (parser);
7145 expr = cp_parser_cast_expression (parser,
7146 /*address_p=*/false,
7147 /*cast_p=*/true, pidk);
7149 /* Warn about old-style casts, if so requested. */
7150 if (warn_old_style_cast
7151 && !in_system_header
7152 && !VOID_TYPE_P (type)
7153 && current_lang_name != lang_name_c)
7154 warning (OPT_Wold_style_cast, "use of old-style cast");
7156 /* Only type conversions to integral or enumeration types
7157 can be used in constant-expressions. */
7158 if (!cast_valid_in_integral_constant_expression_p (type)
7159 && cp_parser_non_integral_constant_expression (parser,
7161 return error_mark_node;
7163 /* Perform the cast. */
7164 expr = build_c_cast (input_location, type, expr);
7168 cp_parser_abort_tentative_parse (parser);
7171 /* If we get here, then it's not a cast, so it must be a
7172 unary-expression. */
7173 return cp_parser_unary_expression (parser, address_p, cast_p, pidk);
7176 /* Parse a binary expression of the general form:
7180 pm-expression .* cast-expression
7181 pm-expression ->* cast-expression
7183 multiplicative-expression:
7185 multiplicative-expression * pm-expression
7186 multiplicative-expression / pm-expression
7187 multiplicative-expression % pm-expression
7189 additive-expression:
7190 multiplicative-expression
7191 additive-expression + multiplicative-expression
7192 additive-expression - multiplicative-expression
7196 shift-expression << additive-expression
7197 shift-expression >> additive-expression
7199 relational-expression:
7201 relational-expression < shift-expression
7202 relational-expression > shift-expression
7203 relational-expression <= shift-expression
7204 relational-expression >= shift-expression
7208 relational-expression:
7209 relational-expression <? shift-expression
7210 relational-expression >? shift-expression
7212 equality-expression:
7213 relational-expression
7214 equality-expression == relational-expression
7215 equality-expression != relational-expression
7219 and-expression & equality-expression
7221 exclusive-or-expression:
7223 exclusive-or-expression ^ and-expression
7225 inclusive-or-expression:
7226 exclusive-or-expression
7227 inclusive-or-expression | exclusive-or-expression
7229 logical-and-expression:
7230 inclusive-or-expression
7231 logical-and-expression && inclusive-or-expression
7233 logical-or-expression:
7234 logical-and-expression
7235 logical-or-expression || logical-and-expression
7237 All these are implemented with a single function like:
7240 simple-cast-expression
7241 binary-expression <token> binary-expression
7243 CAST_P is true if this expression is the target of a cast.
7245 The binops_by_token map is used to get the tree codes for each <token> type.
7246 binary-expressions are associated according to a precedence table. */
7248 #define TOKEN_PRECEDENCE(token) \
7249 (((token->type == CPP_GREATER \
7250 || ((cxx_dialect != cxx98) && token->type == CPP_RSHIFT)) \
7251 && !parser->greater_than_is_operator_p) \
7252 ? PREC_NOT_OPERATOR \
7253 : binops_by_token[token->type].prec)
7256 cp_parser_binary_expression (cp_parser* parser, bool cast_p,
7257 bool no_toplevel_fold_p,
7258 enum cp_parser_prec prec,
7261 cp_parser_expression_stack stack;
7262 cp_parser_expression_stack_entry *sp = &stack[0];
7265 enum tree_code tree_type, lhs_type, rhs_type;
7266 enum cp_parser_prec new_prec, lookahead_prec;
7269 /* Parse the first expression. */
7270 lhs = cp_parser_cast_expression (parser, /*address_p=*/false, cast_p, pidk);
7271 lhs_type = ERROR_MARK;
7275 /* Get an operator token. */
7276 token = cp_lexer_peek_token (parser->lexer);
7278 if (warn_cxx0x_compat
7279 && token->type == CPP_RSHIFT
7280 && !parser->greater_than_is_operator_p)
7282 if (warning_at (token->location, OPT_Wc__0x_compat,
7283 "%<>>%> operator is treated as"
7284 " two right angle brackets in C++11"))
7285 inform (token->location,
7286 "suggest parentheses around %<>>%> expression");
7289 new_prec = TOKEN_PRECEDENCE (token);
7291 /* Popping an entry off the stack means we completed a subexpression:
7292 - either we found a token which is not an operator (`>' where it is not
7293 an operator, or prec == PREC_NOT_OPERATOR), in which case popping
7294 will happen repeatedly;
7295 - or, we found an operator which has lower priority. This is the case
7296 where the recursive descent *ascends*, as in `3 * 4 + 5' after
7298 if (new_prec <= prec)
7307 tree_type = binops_by_token[token->type].tree_type;
7309 /* We used the operator token. */
7310 cp_lexer_consume_token (parser->lexer);
7312 /* For "false && x" or "true || x", x will never be executed;
7313 disable warnings while evaluating it. */
7314 if (tree_type == TRUTH_ANDIF_EXPR)
7315 c_inhibit_evaluation_warnings += lhs == truthvalue_false_node;
7316 else if (tree_type == TRUTH_ORIF_EXPR)
7317 c_inhibit_evaluation_warnings += lhs == truthvalue_true_node;
7319 /* Extract another operand. It may be the RHS of this expression
7320 or the LHS of a new, higher priority expression. */
7321 rhs = cp_parser_simple_cast_expression (parser);
7322 rhs_type = ERROR_MARK;
7324 /* Get another operator token. Look up its precedence to avoid
7325 building a useless (immediately popped) stack entry for common
7326 cases such as 3 + 4 + 5 or 3 * 4 + 5. */
7327 token = cp_lexer_peek_token (parser->lexer);
7328 lookahead_prec = TOKEN_PRECEDENCE (token);
7329 if (lookahead_prec > new_prec)
7331 /* ... and prepare to parse the RHS of the new, higher priority
7332 expression. Since precedence levels on the stack are
7333 monotonically increasing, we do not have to care about
7336 sp->tree_type = tree_type;
7338 sp->lhs_type = lhs_type;
7341 lhs_type = rhs_type;
7343 new_prec = lookahead_prec;
7347 lookahead_prec = new_prec;
7348 /* If the stack is not empty, we have parsed into LHS the right side
7349 (`4' in the example above) of an expression we had suspended.
7350 We can use the information on the stack to recover the LHS (`3')
7351 from the stack together with the tree code (`MULT_EXPR'), and
7352 the precedence of the higher level subexpression
7353 (`PREC_ADDITIVE_EXPRESSION'). TOKEN is the CPP_PLUS token,
7354 which will be used to actually build the additive expression. */
7357 tree_type = sp->tree_type;
7359 rhs_type = lhs_type;
7361 lhs_type = sp->lhs_type;
7364 /* Undo the disabling of warnings done above. */
7365 if (tree_type == TRUTH_ANDIF_EXPR)
7366 c_inhibit_evaluation_warnings -= lhs == truthvalue_false_node;
7367 else if (tree_type == TRUTH_ORIF_EXPR)
7368 c_inhibit_evaluation_warnings -= lhs == truthvalue_true_node;
7371 /* ??? Currently we pass lhs_type == ERROR_MARK and rhs_type ==
7372 ERROR_MARK for everything that is not a binary expression.
7373 This makes warn_about_parentheses miss some warnings that
7374 involve unary operators. For unary expressions we should
7375 pass the correct tree_code unless the unary expression was
7376 surrounded by parentheses.
7378 if (no_toplevel_fold_p
7379 && lookahead_prec <= prec
7381 && TREE_CODE_CLASS (tree_type) == tcc_comparison)
7382 lhs = build2 (tree_type, boolean_type_node, lhs, rhs);
7384 lhs = build_x_binary_op (tree_type, lhs, lhs_type, rhs, rhs_type,
7385 &overload, tf_warning_or_error);
7386 lhs_type = tree_type;
7388 /* If the binary operator required the use of an overloaded operator,
7389 then this expression cannot be an integral constant-expression.
7390 An overloaded operator can be used even if both operands are
7391 otherwise permissible in an integral constant-expression if at
7392 least one of the operands is of enumeration type. */
7395 && cp_parser_non_integral_constant_expression (parser,
7397 return error_mark_node;
7404 /* Parse the `? expression : assignment-expression' part of a
7405 conditional-expression. The LOGICAL_OR_EXPR is the
7406 logical-or-expression that started the conditional-expression.
7407 Returns a representation of the entire conditional-expression.
7409 This routine is used by cp_parser_assignment_expression.
7411 ? expression : assignment-expression
7415 ? : assignment-expression */
7418 cp_parser_question_colon_clause (cp_parser* parser, tree logical_or_expr)
7421 tree assignment_expr;
7422 struct cp_token *token;
7424 /* Consume the `?' token. */
7425 cp_lexer_consume_token (parser->lexer);
7426 token = cp_lexer_peek_token (parser->lexer);
7427 if (cp_parser_allow_gnu_extensions_p (parser)
7428 && token->type == CPP_COLON)
7430 pedwarn (token->location, OPT_pedantic,
7431 "ISO C++ does not allow ?: with omitted middle operand");
7432 /* Implicit true clause. */
7434 c_inhibit_evaluation_warnings += logical_or_expr == truthvalue_true_node;
7435 warn_for_omitted_condop (token->location, logical_or_expr);
7439 bool saved_colon_corrects_to_scope_p = parser->colon_corrects_to_scope_p;
7440 parser->colon_corrects_to_scope_p = false;
7441 /* Parse the expression. */
7442 c_inhibit_evaluation_warnings += logical_or_expr == truthvalue_false_node;
7443 expr = cp_parser_expression (parser, /*cast_p=*/false, NULL);
7444 c_inhibit_evaluation_warnings +=
7445 ((logical_or_expr == truthvalue_true_node)
7446 - (logical_or_expr == truthvalue_false_node));
7447 parser->colon_corrects_to_scope_p = saved_colon_corrects_to_scope_p;
7450 /* The next token should be a `:'. */
7451 cp_parser_require (parser, CPP_COLON, RT_COLON);
7452 /* Parse the assignment-expression. */
7453 assignment_expr = cp_parser_assignment_expression (parser, /*cast_p=*/false, NULL);
7454 c_inhibit_evaluation_warnings -= logical_or_expr == truthvalue_true_node;
7456 /* Build the conditional-expression. */
7457 return build_x_conditional_expr (logical_or_expr,
7460 tf_warning_or_error);
7463 /* Parse an assignment-expression.
7465 assignment-expression:
7466 conditional-expression
7467 logical-or-expression assignment-operator assignment_expression
7470 CAST_P is true if this expression is the target of a cast.
7472 Returns a representation for the expression. */
7475 cp_parser_assignment_expression (cp_parser* parser, bool cast_p,
7480 /* If the next token is the `throw' keyword, then we're looking at
7481 a throw-expression. */
7482 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_THROW))
7483 expr = cp_parser_throw_expression (parser);
7484 /* Otherwise, it must be that we are looking at a
7485 logical-or-expression. */
7488 /* Parse the binary expressions (logical-or-expression). */
7489 expr = cp_parser_binary_expression (parser, cast_p, false,
7490 PREC_NOT_OPERATOR, pidk);
7491 /* If the next token is a `?' then we're actually looking at a
7492 conditional-expression. */
7493 if (cp_lexer_next_token_is (parser->lexer, CPP_QUERY))
7494 return cp_parser_question_colon_clause (parser, expr);
7497 enum tree_code assignment_operator;
7499 /* If it's an assignment-operator, we're using the second
7502 = cp_parser_assignment_operator_opt (parser);
7503 if (assignment_operator != ERROR_MARK)
7505 bool non_constant_p;
7507 /* Parse the right-hand side of the assignment. */
7508 tree rhs = cp_parser_initializer_clause (parser, &non_constant_p);
7510 if (BRACE_ENCLOSED_INITIALIZER_P (rhs))
7511 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
7513 /* An assignment may not appear in a
7514 constant-expression. */
7515 if (cp_parser_non_integral_constant_expression (parser,
7517 return error_mark_node;
7518 /* Build the assignment expression. */
7519 expr = build_x_modify_expr (expr,
7520 assignment_operator,
7522 tf_warning_or_error);
7530 /* Parse an (optional) assignment-operator.
7532 assignment-operator: one of
7533 = *= /= %= += -= >>= <<= &= ^= |=
7537 assignment-operator: one of
7540 If the next token is an assignment operator, the corresponding tree
7541 code is returned, and the token is consumed. For example, for
7542 `+=', PLUS_EXPR is returned. For `=' itself, the code returned is
7543 NOP_EXPR. For `/', TRUNC_DIV_EXPR is returned; for `%',
7544 TRUNC_MOD_EXPR is returned. If TOKEN is not an assignment
7545 operator, ERROR_MARK is returned. */
7547 static enum tree_code
7548 cp_parser_assignment_operator_opt (cp_parser* parser)
7553 /* Peek at the next token. */
7554 token = cp_lexer_peek_token (parser->lexer);
7556 switch (token->type)
7567 op = TRUNC_DIV_EXPR;
7571 op = TRUNC_MOD_EXPR;
7603 /* Nothing else is an assignment operator. */
7607 /* If it was an assignment operator, consume it. */
7608 if (op != ERROR_MARK)
7609 cp_lexer_consume_token (parser->lexer);
7614 /* Parse an expression.
7617 assignment-expression
7618 expression , assignment-expression
7620 CAST_P is true if this expression is the target of a cast.
7622 Returns a representation of the expression. */
7625 cp_parser_expression (cp_parser* parser, bool cast_p, cp_id_kind * pidk)
7627 tree expression = NULL_TREE;
7631 tree assignment_expression;
7633 /* Parse the next assignment-expression. */
7634 assignment_expression
7635 = cp_parser_assignment_expression (parser, cast_p, pidk);
7636 /* If this is the first assignment-expression, we can just
7639 expression = assignment_expression;
7641 expression = build_x_compound_expr (expression,
7642 assignment_expression,
7643 tf_warning_or_error);
7644 /* If the next token is not a comma, then we are done with the
7646 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
7648 /* Consume the `,'. */
7649 cp_lexer_consume_token (parser->lexer);
7650 /* A comma operator cannot appear in a constant-expression. */
7651 if (cp_parser_non_integral_constant_expression (parser, NIC_COMMA))
7652 expression = error_mark_node;
7658 /* Parse a constant-expression.
7660 constant-expression:
7661 conditional-expression
7663 If ALLOW_NON_CONSTANT_P a non-constant expression is silently
7664 accepted. If ALLOW_NON_CONSTANT_P is true and the expression is not
7665 constant, *NON_CONSTANT_P is set to TRUE. If ALLOW_NON_CONSTANT_P
7666 is false, NON_CONSTANT_P should be NULL. */
7669 cp_parser_constant_expression (cp_parser* parser,
7670 bool allow_non_constant_p,
7671 bool *non_constant_p)
7673 bool saved_integral_constant_expression_p;
7674 bool saved_allow_non_integral_constant_expression_p;
7675 bool saved_non_integral_constant_expression_p;
7678 /* It might seem that we could simply parse the
7679 conditional-expression, and then check to see if it were
7680 TREE_CONSTANT. However, an expression that is TREE_CONSTANT is
7681 one that the compiler can figure out is constant, possibly after
7682 doing some simplifications or optimizations. The standard has a
7683 precise definition of constant-expression, and we must honor
7684 that, even though it is somewhat more restrictive.
7690 is not a legal declaration, because `(2, 3)' is not a
7691 constant-expression. The `,' operator is forbidden in a
7692 constant-expression. However, GCC's constant-folding machinery
7693 will fold this operation to an INTEGER_CST for `3'. */
7695 /* Save the old settings. */
7696 saved_integral_constant_expression_p = parser->integral_constant_expression_p;
7697 saved_allow_non_integral_constant_expression_p
7698 = parser->allow_non_integral_constant_expression_p;
7699 saved_non_integral_constant_expression_p = parser->non_integral_constant_expression_p;
7700 /* We are now parsing a constant-expression. */
7701 parser->integral_constant_expression_p = true;
7702 parser->allow_non_integral_constant_expression_p
7703 = (allow_non_constant_p || cxx_dialect >= cxx0x);
7704 parser->non_integral_constant_expression_p = false;
7705 /* Although the grammar says "conditional-expression", we parse an
7706 "assignment-expression", which also permits "throw-expression"
7707 and the use of assignment operators. In the case that
7708 ALLOW_NON_CONSTANT_P is false, we get better errors than we would
7709 otherwise. In the case that ALLOW_NON_CONSTANT_P is true, it is
7710 actually essential that we look for an assignment-expression.
7711 For example, cp_parser_initializer_clauses uses this function to
7712 determine whether a particular assignment-expression is in fact
7714 expression = cp_parser_assignment_expression (parser, /*cast_p=*/false, NULL);
7715 /* Restore the old settings. */
7716 parser->integral_constant_expression_p
7717 = saved_integral_constant_expression_p;
7718 parser->allow_non_integral_constant_expression_p
7719 = saved_allow_non_integral_constant_expression_p;
7720 if (cxx_dialect >= cxx0x)
7722 /* Require an rvalue constant expression here; that's what our
7723 callers expect. Reference constant expressions are handled
7724 separately in e.g. cp_parser_template_argument. */
7725 bool is_const = potential_rvalue_constant_expression (expression);
7726 parser->non_integral_constant_expression_p = !is_const;
7727 if (!is_const && !allow_non_constant_p)
7728 require_potential_rvalue_constant_expression (expression);
7730 if (allow_non_constant_p)
7731 *non_constant_p = parser->non_integral_constant_expression_p;
7732 parser->non_integral_constant_expression_p
7733 = saved_non_integral_constant_expression_p;
7738 /* Parse __builtin_offsetof.
7740 offsetof-expression:
7741 "__builtin_offsetof" "(" type-id "," offsetof-member-designator ")"
7743 offsetof-member-designator:
7745 | offsetof-member-designator "." id-expression
7746 | offsetof-member-designator "[" expression "]"
7747 | offsetof-member-designator "->" id-expression */
7750 cp_parser_builtin_offsetof (cp_parser *parser)
7752 int save_ice_p, save_non_ice_p;
7757 /* We're about to accept non-integral-constant things, but will
7758 definitely yield an integral constant expression. Save and
7759 restore these values around our local parsing. */
7760 save_ice_p = parser->integral_constant_expression_p;
7761 save_non_ice_p = parser->non_integral_constant_expression_p;
7763 /* Consume the "__builtin_offsetof" token. */
7764 cp_lexer_consume_token (parser->lexer);
7765 /* Consume the opening `('. */
7766 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
7767 /* Parse the type-id. */
7768 type = cp_parser_type_id (parser);
7769 /* Look for the `,'. */
7770 cp_parser_require (parser, CPP_COMMA, RT_COMMA);
7771 token = cp_lexer_peek_token (parser->lexer);
7773 /* Build the (type *)null that begins the traditional offsetof macro. */
7774 expr = build_static_cast (build_pointer_type (type), null_pointer_node,
7775 tf_warning_or_error);
7777 /* Parse the offsetof-member-designator. We begin as if we saw "expr->". */
7778 expr = cp_parser_postfix_dot_deref_expression (parser, CPP_DEREF, expr,
7779 true, &dummy, token->location);
7782 token = cp_lexer_peek_token (parser->lexer);
7783 switch (token->type)
7785 case CPP_OPEN_SQUARE:
7786 /* offsetof-member-designator "[" expression "]" */
7787 expr = cp_parser_postfix_open_square_expression (parser, expr, true);
7791 /* offsetof-member-designator "->" identifier */
7792 expr = grok_array_decl (expr, integer_zero_node);
7796 /* offsetof-member-designator "." identifier */
7797 cp_lexer_consume_token (parser->lexer);
7798 expr = cp_parser_postfix_dot_deref_expression (parser, CPP_DOT,
7803 case CPP_CLOSE_PAREN:
7804 /* Consume the ")" token. */
7805 cp_lexer_consume_token (parser->lexer);
7809 /* Error. We know the following require will fail, but
7810 that gives the proper error message. */
7811 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
7812 cp_parser_skip_to_closing_parenthesis (parser, true, false, true);
7813 expr = error_mark_node;
7819 /* If we're processing a template, we can't finish the semantics yet.
7820 Otherwise we can fold the entire expression now. */
7821 if (processing_template_decl)
7822 expr = build1 (OFFSETOF_EXPR, size_type_node, expr);
7824 expr = finish_offsetof (expr);
7827 parser->integral_constant_expression_p = save_ice_p;
7828 parser->non_integral_constant_expression_p = save_non_ice_p;
7833 /* Parse a trait expression.
7835 Returns a representation of the expression, the underlying type
7836 of the type at issue when KEYWORD is RID_UNDERLYING_TYPE. */
7839 cp_parser_trait_expr (cp_parser* parser, enum rid keyword)
7842 tree type1, type2 = NULL_TREE;
7843 bool binary = false;
7844 cp_decl_specifier_seq decl_specs;
7848 case RID_HAS_NOTHROW_ASSIGN:
7849 kind = CPTK_HAS_NOTHROW_ASSIGN;
7851 case RID_HAS_NOTHROW_CONSTRUCTOR:
7852 kind = CPTK_HAS_NOTHROW_CONSTRUCTOR;
7854 case RID_HAS_NOTHROW_COPY:
7855 kind = CPTK_HAS_NOTHROW_COPY;
7857 case RID_HAS_TRIVIAL_ASSIGN:
7858 kind = CPTK_HAS_TRIVIAL_ASSIGN;
7860 case RID_HAS_TRIVIAL_CONSTRUCTOR:
7861 kind = CPTK_HAS_TRIVIAL_CONSTRUCTOR;
7863 case RID_HAS_TRIVIAL_COPY:
7864 kind = CPTK_HAS_TRIVIAL_COPY;
7866 case RID_HAS_TRIVIAL_DESTRUCTOR:
7867 kind = CPTK_HAS_TRIVIAL_DESTRUCTOR;
7869 case RID_HAS_VIRTUAL_DESTRUCTOR:
7870 kind = CPTK_HAS_VIRTUAL_DESTRUCTOR;
7872 case RID_IS_ABSTRACT:
7873 kind = CPTK_IS_ABSTRACT;
7875 case RID_IS_BASE_OF:
7876 kind = CPTK_IS_BASE_OF;
7880 kind = CPTK_IS_CLASS;
7882 case RID_IS_CONVERTIBLE_TO:
7883 kind = CPTK_IS_CONVERTIBLE_TO;
7887 kind = CPTK_IS_EMPTY;
7890 kind = CPTK_IS_ENUM;
7893 kind = CPTK_IS_FINAL;
7895 case RID_IS_LITERAL_TYPE:
7896 kind = CPTK_IS_LITERAL_TYPE;
7901 case RID_IS_POLYMORPHIC:
7902 kind = CPTK_IS_POLYMORPHIC;
7904 case RID_IS_STD_LAYOUT:
7905 kind = CPTK_IS_STD_LAYOUT;
7907 case RID_IS_TRIVIAL:
7908 kind = CPTK_IS_TRIVIAL;
7911 kind = CPTK_IS_UNION;
7913 case RID_UNDERLYING_TYPE:
7914 kind = CPTK_UNDERLYING_TYPE;
7919 case RID_DIRECT_BASES:
7920 kind = CPTK_DIRECT_BASES;
7926 /* Consume the token. */
7927 cp_lexer_consume_token (parser->lexer);
7929 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
7931 type1 = cp_parser_type_id (parser);
7933 if (type1 == error_mark_node)
7934 return error_mark_node;
7936 /* Build a trivial decl-specifier-seq. */
7937 clear_decl_specs (&decl_specs);
7938 decl_specs.type = type1;
7940 /* Call grokdeclarator to figure out what type this is. */
7941 type1 = grokdeclarator (NULL, &decl_specs, TYPENAME,
7942 /*initialized=*/0, /*attrlist=*/NULL);
7946 cp_parser_require (parser, CPP_COMMA, RT_COMMA);
7948 type2 = cp_parser_type_id (parser);
7950 if (type2 == error_mark_node)
7951 return error_mark_node;
7953 /* Build a trivial decl-specifier-seq. */
7954 clear_decl_specs (&decl_specs);
7955 decl_specs.type = type2;
7957 /* Call grokdeclarator to figure out what type this is. */
7958 type2 = grokdeclarator (NULL, &decl_specs, TYPENAME,
7959 /*initialized=*/0, /*attrlist=*/NULL);
7962 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
7964 /* Complete the trait expression, which may mean either processing
7965 the trait expr now or saving it for template instantiation. */
7968 case CPTK_UNDERLYING_TYPE:
7969 return finish_underlying_type (type1);
7971 return finish_bases (type1, false);
7972 case CPTK_DIRECT_BASES:
7973 return finish_bases (type1, true);
7975 return finish_trait_expr (kind, type1, type2);
7979 /* Lambdas that appear in variable initializer or default argument scope
7980 get that in their mangling, so we need to record it. We might as well
7981 use the count for function and namespace scopes as well. */
7982 static GTY(()) tree lambda_scope;
7983 static GTY(()) int lambda_count;
7984 typedef struct GTY(()) tree_int
7989 DEF_VEC_O(tree_int);
7990 DEF_VEC_ALLOC_O(tree_int,gc);
7991 static GTY(()) VEC(tree_int,gc) *lambda_scope_stack;
7994 start_lambda_scope (tree decl)
7998 /* Once we're inside a function, we ignore other scopes and just push
7999 the function again so that popping works properly. */
8000 if (current_function_decl && TREE_CODE (decl) != FUNCTION_DECL)
8001 decl = current_function_decl;
8002 ti.t = lambda_scope;
8003 ti.i = lambda_count;
8004 VEC_safe_push (tree_int, gc, lambda_scope_stack, &ti);
8005 if (lambda_scope != decl)
8007 /* Don't reset the count if we're still in the same function. */
8008 lambda_scope = decl;
8014 record_lambda_scope (tree lambda)
8016 LAMBDA_EXPR_EXTRA_SCOPE (lambda) = lambda_scope;
8017 LAMBDA_EXPR_DISCRIMINATOR (lambda) = lambda_count++;
8021 finish_lambda_scope (void)
8023 tree_int *p = VEC_last (tree_int, lambda_scope_stack);
8024 if (lambda_scope != p->t)
8026 lambda_scope = p->t;
8027 lambda_count = p->i;
8029 VEC_pop (tree_int, lambda_scope_stack);
8032 /* Parse a lambda expression.
8035 lambda-introducer lambda-declarator [opt] compound-statement
8037 Returns a representation of the expression. */
8040 cp_parser_lambda_expression (cp_parser* parser)
8042 tree lambda_expr = build_lambda_expr ();
8046 LAMBDA_EXPR_LOCATION (lambda_expr)
8047 = cp_lexer_peek_token (parser->lexer)->location;
8049 if (cp_unevaluated_operand)
8050 error_at (LAMBDA_EXPR_LOCATION (lambda_expr),
8051 "lambda-expression in unevaluated context");
8053 /* We may be in the middle of deferred access check. Disable
8055 push_deferring_access_checks (dk_no_deferred);
8057 cp_parser_lambda_introducer (parser, lambda_expr);
8059 type = begin_lambda_type (lambda_expr);
8060 if (type == error_mark_node)
8061 return error_mark_node;
8063 record_lambda_scope (lambda_expr);
8065 /* Do this again now that LAMBDA_EXPR_EXTRA_SCOPE is set. */
8066 determine_visibility (TYPE_NAME (type));
8068 /* Now that we've started the type, add the capture fields for any
8069 explicit captures. */
8070 register_capture_members (LAMBDA_EXPR_CAPTURE_LIST (lambda_expr));
8073 /* Inside the class, surrounding template-parameter-lists do not apply. */
8074 unsigned int saved_num_template_parameter_lists
8075 = parser->num_template_parameter_lists;
8076 unsigned char in_statement = parser->in_statement;
8077 bool in_switch_statement_p = parser->in_switch_statement_p;
8079 parser->num_template_parameter_lists = 0;
8080 parser->in_statement = 0;
8081 parser->in_switch_statement_p = false;
8083 /* By virtue of defining a local class, a lambda expression has access to
8084 the private variables of enclosing classes. */
8086 ok = cp_parser_lambda_declarator_opt (parser, lambda_expr);
8089 cp_parser_lambda_body (parser, lambda_expr);
8090 else if (cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE))
8091 cp_parser_skip_to_end_of_block_or_statement (parser);
8093 /* The capture list was built up in reverse order; fix that now. */
8095 tree newlist = NULL_TREE;
8098 for (elt = LAMBDA_EXPR_CAPTURE_LIST (lambda_expr);
8101 next = TREE_CHAIN (elt);
8102 TREE_CHAIN (elt) = newlist;
8105 LAMBDA_EXPR_CAPTURE_LIST (lambda_expr) = newlist;
8109 maybe_add_lambda_conv_op (type);
8111 type = finish_struct (type, /*attributes=*/NULL_TREE);
8113 parser->num_template_parameter_lists = saved_num_template_parameter_lists;
8114 parser->in_statement = in_statement;
8115 parser->in_switch_statement_p = in_switch_statement_p;
8118 pop_deferring_access_checks ();
8120 /* This field is only used during parsing of the lambda. */
8121 LAMBDA_EXPR_THIS_CAPTURE (lambda_expr) = NULL_TREE;
8123 /* This lambda shouldn't have any proxies left at this point. */
8124 gcc_assert (LAMBDA_EXPR_PENDING_PROXIES (lambda_expr) == NULL);
8125 /* And now that we're done, push proxies for an enclosing lambda. */
8126 insert_pending_capture_proxies ();
8129 return build_lambda_object (lambda_expr);
8131 return error_mark_node;
8134 /* Parse the beginning of a lambda expression.
8137 [ lambda-capture [opt] ]
8139 LAMBDA_EXPR is the current representation of the lambda expression. */
8142 cp_parser_lambda_introducer (cp_parser* parser, tree lambda_expr)
8144 /* Need commas after the first capture. */
8147 /* Eat the leading `['. */
8148 cp_parser_require (parser, CPP_OPEN_SQUARE, RT_OPEN_SQUARE);
8150 /* Record default capture mode. "[&" "[=" "[&," "[=," */
8151 if (cp_lexer_next_token_is (parser->lexer, CPP_AND)
8152 && cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_NAME)
8153 LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr) = CPLD_REFERENCE;
8154 else if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
8155 LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr) = CPLD_COPY;
8157 if (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr) != CPLD_NONE)
8159 cp_lexer_consume_token (parser->lexer);
8163 while (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_SQUARE))
8165 cp_token* capture_token;
8167 tree capture_init_expr;
8168 cp_id_kind idk = CP_ID_KIND_NONE;
8169 bool explicit_init_p = false;
8171 enum capture_kind_type
8176 enum capture_kind_type capture_kind = BY_COPY;
8178 if (cp_lexer_next_token_is (parser->lexer, CPP_EOF))
8180 error ("expected end of capture-list");
8187 cp_parser_require (parser, CPP_COMMA, RT_COMMA);
8189 /* Possibly capture `this'. */
8190 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_THIS))
8192 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
8193 if (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr) == CPLD_COPY)
8194 pedwarn (loc, 0, "explicit by-copy capture of %<this%> redundant "
8195 "with by-copy capture default");
8196 cp_lexer_consume_token (parser->lexer);
8197 add_capture (lambda_expr,
8198 /*id=*/this_identifier,
8199 /*initializer=*/finish_this_expr(),
8200 /*by_reference_p=*/false,
8205 /* Remember whether we want to capture as a reference or not. */
8206 if (cp_lexer_next_token_is (parser->lexer, CPP_AND))
8208 capture_kind = BY_REFERENCE;
8209 cp_lexer_consume_token (parser->lexer);
8212 /* Get the identifier. */
8213 capture_token = cp_lexer_peek_token (parser->lexer);
8214 capture_id = cp_parser_identifier (parser);
8216 if (capture_id == error_mark_node)
8217 /* Would be nice to have a cp_parser_skip_to_closing_x for general
8218 delimiters, but I modified this to stop on unnested ']' as well. It
8219 was already changed to stop on unnested '}', so the
8220 "closing_parenthesis" name is no more misleading with my change. */
8222 cp_parser_skip_to_closing_parenthesis (parser,
8223 /*recovering=*/true,
8225 /*consume_paren=*/true);
8229 /* Find the initializer for this capture. */
8230 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
8232 /* An explicit expression exists. */
8233 cp_lexer_consume_token (parser->lexer);
8234 pedwarn (input_location, OPT_pedantic,
8235 "ISO C++ does not allow initializers "
8236 "in lambda expression capture lists");
8237 capture_init_expr = cp_parser_assignment_expression (parser,
8240 explicit_init_p = true;
8244 const char* error_msg;
8246 /* Turn the identifier into an id-expression. */
8248 = cp_parser_lookup_name
8252 /*is_template=*/false,
8253 /*is_namespace=*/false,
8254 /*check_dependency=*/true,
8255 /*ambiguous_decls=*/NULL,
8256 capture_token->location);
8258 if (capture_init_expr == error_mark_node)
8260 unqualified_name_lookup_error (capture_id);
8263 else if (DECL_P (capture_init_expr)
8264 && (TREE_CODE (capture_init_expr) != VAR_DECL
8265 && TREE_CODE (capture_init_expr) != PARM_DECL))
8267 error_at (capture_token->location,
8268 "capture of non-variable %qD ",
8270 inform (0, "%q+#D declared here", capture_init_expr);
8273 if (TREE_CODE (capture_init_expr) == VAR_DECL
8274 && decl_storage_duration (capture_init_expr) != dk_auto)
8276 pedwarn (capture_token->location, 0, "capture of variable "
8277 "%qD with non-automatic storage duration",
8279 inform (0, "%q+#D declared here", capture_init_expr);
8284 = finish_id_expression
8289 /*integral_constant_expression_p=*/false,
8290 /*allow_non_integral_constant_expression_p=*/false,
8291 /*non_integral_constant_expression_p=*/NULL,
8292 /*template_p=*/false,
8294 /*address_p=*/false,
8295 /*template_arg_p=*/false,
8297 capture_token->location);
8300 if (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr) != CPLD_NONE
8301 && !explicit_init_p)
8303 if (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr) == CPLD_COPY
8304 && capture_kind == BY_COPY)
8305 pedwarn (capture_token->location, 0, "explicit by-copy capture "
8306 "of %qD redundant with by-copy capture default",
8308 if (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr) == CPLD_REFERENCE
8309 && capture_kind == BY_REFERENCE)
8310 pedwarn (capture_token->location, 0, "explicit by-reference "
8311 "capture of %qD redundant with by-reference capture "
8312 "default", capture_id);
8315 add_capture (lambda_expr,
8318 /*by_reference_p=*/capture_kind == BY_REFERENCE,
8322 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
8325 /* Parse the (optional) middle of a lambda expression.
8328 ( parameter-declaration-clause [opt] )
8329 attribute-specifier [opt]
8331 exception-specification [opt]
8332 lambda-return-type-clause [opt]
8334 LAMBDA_EXPR is the current representation of the lambda expression. */
8337 cp_parser_lambda_declarator_opt (cp_parser* parser, tree lambda_expr)
8339 /* 5.1.1.4 of the standard says:
8340 If a lambda-expression does not include a lambda-declarator, it is as if
8341 the lambda-declarator were ().
8342 This means an empty parameter list, no attributes, and no exception
8344 tree param_list = void_list_node;
8345 tree attributes = NULL_TREE;
8346 tree exception_spec = NULL_TREE;
8349 /* The lambda-declarator is optional, but must begin with an opening
8350 parenthesis if present. */
8351 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
8353 cp_lexer_consume_token (parser->lexer);
8355 begin_scope (sk_function_parms, /*entity=*/NULL_TREE);
8357 /* Parse parameters. */
8358 param_list = cp_parser_parameter_declaration_clause (parser);
8360 /* Default arguments shall not be specified in the
8361 parameter-declaration-clause of a lambda-declarator. */
8362 for (t = param_list; t; t = TREE_CHAIN (t))
8363 if (TREE_PURPOSE (t))
8364 pedwarn (DECL_SOURCE_LOCATION (TREE_VALUE (t)), OPT_pedantic,
8365 "default argument specified for lambda parameter");
8367 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
8369 attributes = cp_parser_attributes_opt (parser);
8371 /* Parse optional `mutable' keyword. */
8372 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_MUTABLE))
8374 cp_lexer_consume_token (parser->lexer);
8375 LAMBDA_EXPR_MUTABLE_P (lambda_expr) = 1;
8378 /* Parse optional exception specification. */
8379 exception_spec = cp_parser_exception_specification_opt (parser);
8381 /* Parse optional trailing return type. */
8382 if (cp_lexer_next_token_is (parser->lexer, CPP_DEREF))
8384 cp_lexer_consume_token (parser->lexer);
8385 LAMBDA_EXPR_RETURN_TYPE (lambda_expr) = cp_parser_type_id (parser);
8388 /* The function parameters must be in scope all the way until after the
8389 trailing-return-type in case of decltype. */
8390 for (t = current_binding_level->names; t; t = DECL_CHAIN (t))
8391 pop_binding (DECL_NAME (t), t);
8396 /* Create the function call operator.
8398 Messing with declarators like this is no uglier than building up the
8399 FUNCTION_DECL by hand, and this is less likely to get out of sync with
8402 cp_decl_specifier_seq return_type_specs;
8403 cp_declarator* declarator;
8408 clear_decl_specs (&return_type_specs);
8409 if (LAMBDA_EXPR_RETURN_TYPE (lambda_expr))
8410 return_type_specs.type = LAMBDA_EXPR_RETURN_TYPE (lambda_expr);
8412 /* Maybe we will deduce the return type later, but we can use void
8413 as a placeholder return type anyways. */
8414 return_type_specs.type = void_type_node;
8416 p = obstack_alloc (&declarator_obstack, 0);
8418 declarator = make_id_declarator (NULL_TREE, ansi_opname (CALL_EXPR),
8421 quals = (LAMBDA_EXPR_MUTABLE_P (lambda_expr)
8422 ? TYPE_UNQUALIFIED : TYPE_QUAL_CONST);
8423 declarator = make_call_declarator (declarator, param_list, quals,
8424 VIRT_SPEC_UNSPECIFIED,
8426 /*late_return_type=*/NULL_TREE);
8427 declarator->id_loc = LAMBDA_EXPR_LOCATION (lambda_expr);
8429 fco = grokmethod (&return_type_specs,
8432 if (fco != error_mark_node)
8434 DECL_INITIALIZED_IN_CLASS_P (fco) = 1;
8435 DECL_ARTIFICIAL (fco) = 1;
8436 /* Give the object parameter a different name. */
8437 DECL_NAME (DECL_ARGUMENTS (fco)) = get_identifier ("__closure");
8440 finish_member_declaration (fco);
8442 obstack_free (&declarator_obstack, p);
8444 return (fco != error_mark_node);
8448 /* Parse the body of a lambda expression, which is simply
8452 but which requires special handling.
8453 LAMBDA_EXPR is the current representation of the lambda expression. */
8456 cp_parser_lambda_body (cp_parser* parser, tree lambda_expr)
8458 bool nested = (current_function_decl != NULL_TREE);
8459 bool local_variables_forbidden_p = parser->local_variables_forbidden_p;
8461 push_function_context ();
8463 /* Still increment function_depth so that we don't GC in the
8464 middle of an expression. */
8466 /* Clear this in case we're in the middle of a default argument. */
8467 parser->local_variables_forbidden_p = false;
8469 /* Finish the function call operator
8471 + late_parsing_for_member
8472 + function_definition_after_declarator
8473 + ctor_initializer_opt_and_function_body */
8475 tree fco = lambda_function (lambda_expr);
8481 /* Let the front end know that we are going to be defining this
8483 start_preparsed_function (fco,
8485 SF_PRE_PARSED | SF_INCLASS_INLINE);
8487 start_lambda_scope (fco);
8488 body = begin_function_body ();
8490 if (!cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE))
8493 /* Push the proxies for any explicit captures. */
8494 for (cap = LAMBDA_EXPR_CAPTURE_LIST (lambda_expr); cap;
8495 cap = TREE_CHAIN (cap))
8496 build_capture_proxy (TREE_PURPOSE (cap));
8498 compound_stmt = begin_compound_stmt (0);
8500 /* 5.1.1.4 of the standard says:
8501 If a lambda-expression does not include a trailing-return-type, it
8502 is as if the trailing-return-type denotes the following type:
8503 * if the compound-statement is of the form
8504 { return attribute-specifier [opt] expression ; }
8505 the type of the returned expression after lvalue-to-rvalue
8506 conversion (_conv.lval_ 4.1), array-to-pointer conversion
8507 (_conv.array_ 4.2), and function-to-pointer conversion
8509 * otherwise, void. */
8511 /* In a lambda that has neither a lambda-return-type-clause
8512 nor a deducible form, errors should be reported for return statements
8513 in the body. Since we used void as the placeholder return type, parsing
8514 the body as usual will give such desired behavior. */
8515 if (!LAMBDA_EXPR_RETURN_TYPE (lambda_expr)
8516 && cp_lexer_peek_nth_token (parser->lexer, 1)->keyword == RID_RETURN
8517 && cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_SEMICOLON)
8519 tree expr = NULL_TREE;
8520 cp_id_kind idk = CP_ID_KIND_NONE;
8522 /* Parse tentatively in case there's more after the initial return
8524 cp_parser_parse_tentatively (parser);
8526 cp_parser_require_keyword (parser, RID_RETURN, RT_RETURN);
8528 expr = cp_parser_expression (parser, /*cast_p=*/false, &idk);
8530 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
8531 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
8533 if (cp_parser_parse_definitely (parser))
8535 apply_lambda_return_type (lambda_expr, lambda_return_type (expr));
8537 /* Will get error here if type not deduced yet. */
8538 finish_return_stmt (expr);
8546 if (!LAMBDA_EXPR_RETURN_TYPE (lambda_expr))
8547 LAMBDA_EXPR_DEDUCE_RETURN_TYPE_P (lambda_expr) = true;
8548 while (cp_lexer_next_token_is_keyword (parser->lexer, RID_LABEL))
8549 cp_parser_label_declaration (parser);
8550 cp_parser_statement_seq_opt (parser, NULL_TREE);
8551 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
8552 LAMBDA_EXPR_DEDUCE_RETURN_TYPE_P (lambda_expr) = false;
8555 finish_compound_stmt (compound_stmt);
8558 finish_function_body (body);
8559 finish_lambda_scope ();
8561 /* Finish the function and generate code for it if necessary. */
8562 expand_or_defer_fn (finish_function (/*inline*/2));
8565 parser->local_variables_forbidden_p = local_variables_forbidden_p;
8567 pop_function_context();
8572 /* Statements [gram.stmt.stmt] */
8574 /* Parse a statement.
8578 expression-statement
8583 declaration-statement
8591 IN_COMPOUND is true when the statement is nested inside a
8592 cp_parser_compound_statement; this matters for certain pragmas.
8594 If IF_P is not NULL, *IF_P is set to indicate whether the statement
8595 is a (possibly labeled) if statement which is not enclosed in braces
8596 and has an else clause. This is used to implement -Wparentheses. */
8599 cp_parser_statement (cp_parser* parser, tree in_statement_expr,
8600 bool in_compound, bool *if_p)
8604 location_t statement_location;
8609 /* There is no statement yet. */
8610 statement = NULL_TREE;
8611 /* Peek at the next token. */
8612 token = cp_lexer_peek_token (parser->lexer);
8613 /* Remember the location of the first token in the statement. */
8614 statement_location = token->location;
8615 /* If this is a keyword, then that will often determine what kind of
8616 statement we have. */
8617 if (token->type == CPP_KEYWORD)
8619 enum rid keyword = token->keyword;
8625 /* Looks like a labeled-statement with a case label.
8626 Parse the label, and then use tail recursion to parse
8628 cp_parser_label_for_labeled_statement (parser);
8633 statement = cp_parser_selection_statement (parser, if_p);
8639 statement = cp_parser_iteration_statement (parser);
8646 statement = cp_parser_jump_statement (parser);
8649 /* Objective-C++ exception-handling constructs. */
8652 case RID_AT_FINALLY:
8653 case RID_AT_SYNCHRONIZED:
8655 statement = cp_parser_objc_statement (parser);
8659 statement = cp_parser_try_block (parser);
8663 /* This must be a namespace alias definition. */
8664 cp_parser_declaration_statement (parser);
8667 case RID_TRANSACTION_ATOMIC:
8668 case RID_TRANSACTION_RELAXED:
8669 statement = cp_parser_transaction (parser, keyword);
8671 case RID_TRANSACTION_CANCEL:
8672 statement = cp_parser_transaction_cancel (parser);
8676 /* It might be a keyword like `int' that can start a
8677 declaration-statement. */
8681 else if (token->type == CPP_NAME)
8683 /* If the next token is a `:', then we are looking at a
8684 labeled-statement. */
8685 token = cp_lexer_peek_nth_token (parser->lexer, 2);
8686 if (token->type == CPP_COLON)
8688 /* Looks like a labeled-statement with an ordinary label.
8689 Parse the label, and then use tail recursion to parse
8691 cp_parser_label_for_labeled_statement (parser);
8695 /* Anything that starts with a `{' must be a compound-statement. */
8696 else if (token->type == CPP_OPEN_BRACE)
8697 statement = cp_parser_compound_statement (parser, NULL, false, false);
8698 /* CPP_PRAGMA is a #pragma inside a function body, which constitutes
8699 a statement all its own. */
8700 else if (token->type == CPP_PRAGMA)
8702 /* Only certain OpenMP pragmas are attached to statements, and thus
8703 are considered statements themselves. All others are not. In
8704 the context of a compound, accept the pragma as a "statement" and
8705 return so that we can check for a close brace. Otherwise we
8706 require a real statement and must go back and read one. */
8708 cp_parser_pragma (parser, pragma_compound);
8709 else if (!cp_parser_pragma (parser, pragma_stmt))
8713 else if (token->type == CPP_EOF)
8715 cp_parser_error (parser, "expected statement");
8719 /* Everything else must be a declaration-statement or an
8720 expression-statement. Try for the declaration-statement
8721 first, unless we are looking at a `;', in which case we know that
8722 we have an expression-statement. */
8725 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
8727 cp_parser_parse_tentatively (parser);
8728 /* Try to parse the declaration-statement. */
8729 cp_parser_declaration_statement (parser);
8730 /* If that worked, we're done. */
8731 if (cp_parser_parse_definitely (parser))
8734 /* Look for an expression-statement instead. */
8735 statement = cp_parser_expression_statement (parser, in_statement_expr);
8738 /* Set the line number for the statement. */
8739 if (statement && STATEMENT_CODE_P (TREE_CODE (statement)))
8740 SET_EXPR_LOCATION (statement, statement_location);
8743 /* Parse the label for a labeled-statement, i.e.
8746 case constant-expression :
8750 case constant-expression ... constant-expression : statement
8752 When a label is parsed without errors, the label is added to the
8753 parse tree by the finish_* functions, so this function doesn't
8754 have to return the label. */
8757 cp_parser_label_for_labeled_statement (cp_parser* parser)
8760 tree label = NULL_TREE;
8761 bool saved_colon_corrects_to_scope_p = parser->colon_corrects_to_scope_p;
8763 /* The next token should be an identifier. */
8764 token = cp_lexer_peek_token (parser->lexer);
8765 if (token->type != CPP_NAME
8766 && token->type != CPP_KEYWORD)
8768 cp_parser_error (parser, "expected labeled-statement");
8772 parser->colon_corrects_to_scope_p = false;
8773 switch (token->keyword)
8780 /* Consume the `case' token. */
8781 cp_lexer_consume_token (parser->lexer);
8782 /* Parse the constant-expression. */
8783 expr = cp_parser_constant_expression (parser,
8784 /*allow_non_constant_p=*/false,
8787 ellipsis = cp_lexer_peek_token (parser->lexer);
8788 if (ellipsis->type == CPP_ELLIPSIS)
8790 /* Consume the `...' token. */
8791 cp_lexer_consume_token (parser->lexer);
8793 cp_parser_constant_expression (parser,
8794 /*allow_non_constant_p=*/false,
8796 /* We don't need to emit warnings here, as the common code
8797 will do this for us. */
8800 expr_hi = NULL_TREE;
8802 if (parser->in_switch_statement_p)
8803 finish_case_label (token->location, expr, expr_hi);
8805 error_at (token->location,
8806 "case label %qE not within a switch statement",
8812 /* Consume the `default' token. */
8813 cp_lexer_consume_token (parser->lexer);
8815 if (parser->in_switch_statement_p)
8816 finish_case_label (token->location, NULL_TREE, NULL_TREE);
8818 error_at (token->location, "case label not within a switch statement");
8822 /* Anything else must be an ordinary label. */
8823 label = finish_label_stmt (cp_parser_identifier (parser));
8827 /* Require the `:' token. */
8828 cp_parser_require (parser, CPP_COLON, RT_COLON);
8830 /* An ordinary label may optionally be followed by attributes.
8831 However, this is only permitted if the attributes are then
8832 followed by a semicolon. This is because, for backward
8833 compatibility, when parsing
8834 lab: __attribute__ ((unused)) int i;
8835 we want the attribute to attach to "i", not "lab". */
8836 if (label != NULL_TREE
8837 && cp_lexer_next_token_is_keyword (parser->lexer, RID_ATTRIBUTE))
8841 cp_parser_parse_tentatively (parser);
8842 attrs = cp_parser_attributes_opt (parser);
8843 if (attrs == NULL_TREE
8844 || cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
8845 cp_parser_abort_tentative_parse (parser);
8846 else if (!cp_parser_parse_definitely (parser))
8849 cplus_decl_attributes (&label, attrs, 0);
8852 parser->colon_corrects_to_scope_p = saved_colon_corrects_to_scope_p;
8855 /* Parse an expression-statement.
8857 expression-statement:
8860 Returns the new EXPR_STMT -- or NULL_TREE if the expression
8861 statement consists of nothing more than an `;'. IN_STATEMENT_EXPR_P
8862 indicates whether this expression-statement is part of an
8863 expression statement. */
8866 cp_parser_expression_statement (cp_parser* parser, tree in_statement_expr)
8868 tree statement = NULL_TREE;
8869 cp_token *token = cp_lexer_peek_token (parser->lexer);
8871 /* If the next token is a ';', then there is no expression
8873 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
8874 statement = cp_parser_expression (parser, /*cast_p=*/false, NULL);
8876 /* Give a helpful message for "A<T>::type t;" and the like. */
8877 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON)
8878 && !cp_parser_uncommitted_to_tentative_parse_p (parser))
8880 if (TREE_CODE (statement) == SCOPE_REF)
8881 error_at (token->location, "need %<typename%> before %qE because "
8882 "%qT is a dependent scope",
8883 statement, TREE_OPERAND (statement, 0));
8884 else if (is_overloaded_fn (statement)
8885 && DECL_CONSTRUCTOR_P (get_first_fn (statement)))
8888 tree fn = get_first_fn (statement);
8889 error_at (token->location,
8890 "%<%T::%D%> names the constructor, not the type",
8891 DECL_CONTEXT (fn), DECL_NAME (fn));
8895 /* Consume the final `;'. */
8896 cp_parser_consume_semicolon_at_end_of_statement (parser);
8898 if (in_statement_expr
8899 && cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
8900 /* This is the final expression statement of a statement
8902 statement = finish_stmt_expr_expr (statement, in_statement_expr);
8904 statement = finish_expr_stmt (statement);
8911 /* Parse a compound-statement.
8914 { statement-seq [opt] }
8919 { label-declaration-seq [opt] statement-seq [opt] }
8921 label-declaration-seq:
8923 label-declaration-seq label-declaration
8925 Returns a tree representing the statement. */
8928 cp_parser_compound_statement (cp_parser *parser, tree in_statement_expr,
8929 bool in_try, bool function_body)
8933 /* Consume the `{'. */
8934 if (!cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE))
8935 return error_mark_node;
8936 if (DECL_DECLARED_CONSTEXPR_P (current_function_decl)
8938 pedwarn (input_location, OPT_pedantic,
8939 "compound-statement in constexpr function");
8940 /* Begin the compound-statement. */
8941 compound_stmt = begin_compound_stmt (in_try ? BCS_TRY_BLOCK : 0);
8942 /* If the next keyword is `__label__' we have a label declaration. */
8943 while (cp_lexer_next_token_is_keyword (parser->lexer, RID_LABEL))
8944 cp_parser_label_declaration (parser);
8945 /* Parse an (optional) statement-seq. */
8946 cp_parser_statement_seq_opt (parser, in_statement_expr);
8947 /* Finish the compound-statement. */
8948 finish_compound_stmt (compound_stmt);
8949 /* Consume the `}'. */
8950 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
8952 return compound_stmt;
8955 /* Parse an (optional) statement-seq.
8959 statement-seq [opt] statement */
8962 cp_parser_statement_seq_opt (cp_parser* parser, tree in_statement_expr)
8964 /* Scan statements until there aren't any more. */
8967 cp_token *token = cp_lexer_peek_token (parser->lexer);
8969 /* If we are looking at a `}', then we have run out of
8970 statements; the same is true if we have reached the end
8971 of file, or have stumbled upon a stray '@end'. */
8972 if (token->type == CPP_CLOSE_BRACE
8973 || token->type == CPP_EOF
8974 || token->type == CPP_PRAGMA_EOL
8975 || (token->type == CPP_KEYWORD && token->keyword == RID_AT_END))
8978 /* If we are in a compound statement and find 'else' then
8979 something went wrong. */
8980 else if (token->type == CPP_KEYWORD && token->keyword == RID_ELSE)
8982 if (parser->in_statement & IN_IF_STMT)
8986 token = cp_lexer_consume_token (parser->lexer);
8987 error_at (token->location, "%<else%> without a previous %<if%>");
8991 /* Parse the statement. */
8992 cp_parser_statement (parser, in_statement_expr, true, NULL);
8996 /* Parse a selection-statement.
8998 selection-statement:
8999 if ( condition ) statement
9000 if ( condition ) statement else statement
9001 switch ( condition ) statement
9003 Returns the new IF_STMT or SWITCH_STMT.
9005 If IF_P is not NULL, *IF_P is set to indicate whether the statement
9006 is a (possibly labeled) if statement which is not enclosed in
9007 braces and has an else clause. This is used to implement
9011 cp_parser_selection_statement (cp_parser* parser, bool *if_p)
9019 /* Peek at the next token. */
9020 token = cp_parser_require (parser, CPP_KEYWORD, RT_SELECT);
9022 /* See what kind of keyword it is. */
9023 keyword = token->keyword;
9032 /* Look for the `('. */
9033 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
9035 cp_parser_skip_to_end_of_statement (parser);
9036 return error_mark_node;
9039 /* Begin the selection-statement. */
9040 if (keyword == RID_IF)
9041 statement = begin_if_stmt ();
9043 statement = begin_switch_stmt ();
9045 /* Parse the condition. */
9046 condition = cp_parser_condition (parser);
9047 /* Look for the `)'. */
9048 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
9049 cp_parser_skip_to_closing_parenthesis (parser, true, false,
9050 /*consume_paren=*/true);
9052 if (keyword == RID_IF)
9055 unsigned char in_statement;
9057 /* Add the condition. */
9058 finish_if_stmt_cond (condition, statement);
9060 /* Parse the then-clause. */
9061 in_statement = parser->in_statement;
9062 parser->in_statement |= IN_IF_STMT;
9063 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
9065 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
9066 add_stmt (build_empty_stmt (loc));
9067 cp_lexer_consume_token (parser->lexer);
9068 if (!cp_lexer_next_token_is_keyword (parser->lexer, RID_ELSE))
9069 warning_at (loc, OPT_Wempty_body, "suggest braces around "
9070 "empty body in an %<if%> statement");
9074 cp_parser_implicitly_scoped_statement (parser, &nested_if);
9075 parser->in_statement = in_statement;
9077 finish_then_clause (statement);
9079 /* If the next token is `else', parse the else-clause. */
9080 if (cp_lexer_next_token_is_keyword (parser->lexer,
9083 /* Consume the `else' keyword. */
9084 cp_lexer_consume_token (parser->lexer);
9085 begin_else_clause (statement);
9086 /* Parse the else-clause. */
9087 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
9090 loc = cp_lexer_peek_token (parser->lexer)->location;
9092 OPT_Wempty_body, "suggest braces around "
9093 "empty body in an %<else%> statement");
9094 add_stmt (build_empty_stmt (loc));
9095 cp_lexer_consume_token (parser->lexer);
9098 cp_parser_implicitly_scoped_statement (parser, NULL);
9100 finish_else_clause (statement);
9102 /* If we are currently parsing a then-clause, then
9103 IF_P will not be NULL. We set it to true to
9104 indicate that this if statement has an else clause.
9105 This may trigger the Wparentheses warning below
9106 when we get back up to the parent if statement. */
9112 /* This if statement does not have an else clause. If
9113 NESTED_IF is true, then the then-clause is an if
9114 statement which does have an else clause. We warn
9115 about the potential ambiguity. */
9117 warning_at (EXPR_LOCATION (statement), OPT_Wparentheses,
9118 "suggest explicit braces to avoid ambiguous"
9122 /* Now we're all done with the if-statement. */
9123 finish_if_stmt (statement);
9127 bool in_switch_statement_p;
9128 unsigned char in_statement;
9130 /* Add the condition. */
9131 finish_switch_cond (condition, statement);
9133 /* Parse the body of the switch-statement. */
9134 in_switch_statement_p = parser->in_switch_statement_p;
9135 in_statement = parser->in_statement;
9136 parser->in_switch_statement_p = true;
9137 parser->in_statement |= IN_SWITCH_STMT;
9138 cp_parser_implicitly_scoped_statement (parser, NULL);
9139 parser->in_switch_statement_p = in_switch_statement_p;
9140 parser->in_statement = in_statement;
9142 /* Now we're all done with the switch-statement. */
9143 finish_switch_stmt (statement);
9151 cp_parser_error (parser, "expected selection-statement");
9152 return error_mark_node;
9156 /* Parse a condition.
9160 type-specifier-seq declarator = initializer-clause
9161 type-specifier-seq declarator braced-init-list
9166 type-specifier-seq declarator asm-specification [opt]
9167 attributes [opt] = assignment-expression
9169 Returns the expression that should be tested. */
9172 cp_parser_condition (cp_parser* parser)
9174 cp_decl_specifier_seq type_specifiers;
9175 const char *saved_message;
9176 int declares_class_or_enum;
9178 /* Try the declaration first. */
9179 cp_parser_parse_tentatively (parser);
9180 /* New types are not allowed in the type-specifier-seq for a
9182 saved_message = parser->type_definition_forbidden_message;
9183 parser->type_definition_forbidden_message
9184 = G_("types may not be defined in conditions");
9185 /* Parse the type-specifier-seq. */
9186 cp_parser_decl_specifier_seq (parser,
9187 CP_PARSER_FLAGS_ONLY_TYPE_OR_CONSTEXPR,
9189 &declares_class_or_enum);
9190 /* Restore the saved message. */
9191 parser->type_definition_forbidden_message = saved_message;
9192 /* If all is well, we might be looking at a declaration. */
9193 if (!cp_parser_error_occurred (parser))
9196 tree asm_specification;
9198 cp_declarator *declarator;
9199 tree initializer = NULL_TREE;
9201 /* Parse the declarator. */
9202 declarator = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
9203 /*ctor_dtor_or_conv_p=*/NULL,
9204 /*parenthesized_p=*/NULL,
9205 /*member_p=*/false);
9206 /* Parse the attributes. */
9207 attributes = cp_parser_attributes_opt (parser);
9208 /* Parse the asm-specification. */
9209 asm_specification = cp_parser_asm_specification_opt (parser);
9210 /* If the next token is not an `=' or '{', then we might still be
9211 looking at an expression. For example:
9215 looks like a decl-specifier-seq and a declarator -- but then
9216 there is no `=', so this is an expression. */
9217 if (cp_lexer_next_token_is_not (parser->lexer, CPP_EQ)
9218 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE))
9219 cp_parser_simulate_error (parser);
9221 /* If we did see an `=' or '{', then we are looking at a declaration
9223 if (cp_parser_parse_definitely (parser))
9226 bool non_constant_p;
9227 bool flags = LOOKUP_ONLYCONVERTING;
9229 /* Create the declaration. */
9230 decl = start_decl (declarator, &type_specifiers,
9231 /*initialized_p=*/true,
9232 attributes, /*prefix_attributes=*/NULL_TREE,
9235 /* Parse the initializer. */
9236 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
9238 initializer = cp_parser_braced_list (parser, &non_constant_p);
9239 CONSTRUCTOR_IS_DIRECT_INIT (initializer) = 1;
9244 /* Consume the `='. */
9245 cp_parser_require (parser, CPP_EQ, RT_EQ);
9246 initializer = cp_parser_initializer_clause (parser, &non_constant_p);
9248 if (BRACE_ENCLOSED_INITIALIZER_P (initializer))
9249 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
9251 /* Process the initializer. */
9252 cp_finish_decl (decl,
9253 initializer, !non_constant_p,
9258 pop_scope (pushed_scope);
9260 return convert_from_reference (decl);
9263 /* If we didn't even get past the declarator successfully, we are
9264 definitely not looking at a declaration. */
9266 cp_parser_abort_tentative_parse (parser);
9268 /* Otherwise, we are looking at an expression. */
9269 return cp_parser_expression (parser, /*cast_p=*/false, NULL);
9272 /* Parses a for-statement or range-for-statement until the closing ')',
9276 cp_parser_for (cp_parser *parser)
9278 tree init, scope, decl;
9281 /* Begin the for-statement. */
9282 scope = begin_for_scope (&init);
9284 /* Parse the initialization. */
9285 is_range_for = cp_parser_for_init_statement (parser, &decl);
9288 return cp_parser_range_for (parser, scope, init, decl);
9290 return cp_parser_c_for (parser, scope, init);
9294 cp_parser_c_for (cp_parser *parser, tree scope, tree init)
9296 /* Normal for loop */
9297 tree condition = NULL_TREE;
9298 tree expression = NULL_TREE;
9301 stmt = begin_for_stmt (scope, init);
9302 /* The for-init-statement has already been parsed in
9303 cp_parser_for_init_statement, so no work is needed here. */
9304 finish_for_init_stmt (stmt);
9306 /* If there's a condition, process it. */
9307 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
9308 condition = cp_parser_condition (parser);
9309 finish_for_cond (condition, stmt);
9310 /* Look for the `;'. */
9311 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
9313 /* If there's an expression, process it. */
9314 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN))
9315 expression = cp_parser_expression (parser, /*cast_p=*/false, NULL);
9316 finish_for_expr (expression, stmt);
9321 /* Tries to parse a range-based for-statement:
9324 decl-specifier-seq declarator : expression
9326 The decl-specifier-seq declarator and the `:' are already parsed by
9327 cp_parser_for_init_statement. If processing_template_decl it returns a
9328 newly created RANGE_FOR_STMT; if not, it is converted to a
9329 regular FOR_STMT. */
9332 cp_parser_range_for (cp_parser *parser, tree scope, tree init, tree range_decl)
9334 tree stmt, range_expr;
9336 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
9338 bool expr_non_constant_p;
9339 range_expr = cp_parser_braced_list (parser, &expr_non_constant_p);
9342 range_expr = cp_parser_expression (parser, /*cast_p=*/false, NULL);
9344 /* If in template, STMT is converted to a normal for-statement
9345 at instantiation. If not, it is done just ahead. */
9346 if (processing_template_decl)
9348 if (check_for_bare_parameter_packs (range_expr))
9349 range_expr = error_mark_node;
9350 stmt = begin_range_for_stmt (scope, init);
9351 finish_range_for_decl (stmt, range_decl, range_expr);
9352 if (!type_dependent_expression_p (range_expr)
9353 /* do_auto_deduction doesn't mess with template init-lists. */
9354 && !BRACE_ENCLOSED_INITIALIZER_P (range_expr))
9355 do_range_for_auto_deduction (range_decl, range_expr);
9359 stmt = begin_for_stmt (scope, init);
9360 stmt = cp_convert_range_for (stmt, range_decl, range_expr);
9365 /* Subroutine of cp_convert_range_for: given the initializer expression,
9366 builds up the range temporary. */
9369 build_range_temp (tree range_expr)
9371 tree range_type, range_temp;
9373 /* Find out the type deduced by the declaration
9374 `auto &&__range = range_expr'. */
9375 range_type = cp_build_reference_type (make_auto (), true);
9376 range_type = do_auto_deduction (range_type, range_expr,
9377 type_uses_auto (range_type));
9379 /* Create the __range variable. */
9380 range_temp = build_decl (input_location, VAR_DECL,
9381 get_identifier ("__for_range"), range_type);
9382 TREE_USED (range_temp) = 1;
9383 DECL_ARTIFICIAL (range_temp) = 1;
9388 /* Used by cp_parser_range_for in template context: we aren't going to
9389 do a full conversion yet, but we still need to resolve auto in the
9390 type of the for-range-declaration if present. This is basically
9391 a shortcut version of cp_convert_range_for. */
9394 do_range_for_auto_deduction (tree decl, tree range_expr)
9396 tree auto_node = type_uses_auto (TREE_TYPE (decl));
9399 tree begin_dummy, end_dummy, range_temp, iter_type, iter_decl;
9400 range_temp = convert_from_reference (build_range_temp (range_expr));
9401 iter_type = (cp_parser_perform_range_for_lookup
9402 (range_temp, &begin_dummy, &end_dummy));
9403 iter_decl = build_decl (input_location, VAR_DECL, NULL_TREE, iter_type);
9404 iter_decl = build_x_indirect_ref (iter_decl, RO_NULL,
9405 tf_warning_or_error);
9406 TREE_TYPE (decl) = do_auto_deduction (TREE_TYPE (decl),
9407 iter_decl, auto_node);
9411 /* Converts a range-based for-statement into a normal
9412 for-statement, as per the definition.
9414 for (RANGE_DECL : RANGE_EXPR)
9417 should be equivalent to:
9420 auto &&__range = RANGE_EXPR;
9421 for (auto __begin = BEGIN_EXPR, end = END_EXPR;
9425 RANGE_DECL = *__begin;
9430 If RANGE_EXPR is an array:
9431 BEGIN_EXPR = __range
9432 END_EXPR = __range + ARRAY_SIZE(__range)
9433 Else if RANGE_EXPR has a member 'begin' or 'end':
9434 BEGIN_EXPR = __range.begin()
9435 END_EXPR = __range.end()
9437 BEGIN_EXPR = begin(__range)
9438 END_EXPR = end(__range);
9440 If __range has a member 'begin' but not 'end', or vice versa, we must
9441 still use the second alternative (it will surely fail, however).
9442 When calling begin()/end() in the third alternative we must use
9443 argument dependent lookup, but always considering 'std' as an associated
9447 cp_convert_range_for (tree statement, tree range_decl, tree range_expr)
9450 tree iter_type, begin_expr, end_expr;
9451 tree condition, expression;
9453 if (range_decl == error_mark_node || range_expr == error_mark_node)
9454 /* If an error happened previously do nothing or else a lot of
9455 unhelpful errors would be issued. */
9456 begin_expr = end_expr = iter_type = error_mark_node;
9459 tree range_temp = build_range_temp (range_expr);
9460 pushdecl (range_temp);
9461 cp_finish_decl (range_temp, range_expr,
9462 /*is_constant_init*/false, NULL_TREE,
9463 LOOKUP_ONLYCONVERTING);
9465 range_temp = convert_from_reference (range_temp);
9466 iter_type = cp_parser_perform_range_for_lookup (range_temp,
9467 &begin_expr, &end_expr);
9470 /* The new for initialization statement. */
9471 begin = build_decl (input_location, VAR_DECL,
9472 get_identifier ("__for_begin"), iter_type);
9473 TREE_USED (begin) = 1;
9474 DECL_ARTIFICIAL (begin) = 1;
9476 cp_finish_decl (begin, begin_expr,
9477 /*is_constant_init*/false, NULL_TREE,
9478 LOOKUP_ONLYCONVERTING);
9480 end = build_decl (input_location, VAR_DECL,
9481 get_identifier ("__for_end"), iter_type);
9482 TREE_USED (end) = 1;
9483 DECL_ARTIFICIAL (end) = 1;
9485 cp_finish_decl (end, end_expr,
9486 /*is_constant_init*/false, NULL_TREE,
9487 LOOKUP_ONLYCONVERTING);
9489 finish_for_init_stmt (statement);
9491 /* The new for condition. */
9492 condition = build_x_binary_op (NE_EXPR,
9495 NULL, tf_warning_or_error);
9496 finish_for_cond (condition, statement);
9498 /* The new increment expression. */
9499 expression = finish_unary_op_expr (PREINCREMENT_EXPR, begin);
9500 finish_for_expr (expression, statement);
9502 /* The declaration is initialized with *__begin inside the loop body. */
9503 cp_finish_decl (range_decl,
9504 build_x_indirect_ref (begin, RO_NULL, tf_warning_or_error),
9505 /*is_constant_init*/false, NULL_TREE,
9506 LOOKUP_ONLYCONVERTING);
9511 /* Solves BEGIN_EXPR and END_EXPR as described in cp_convert_range_for.
9512 We need to solve both at the same time because the method used
9513 depends on the existence of members begin or end.
9514 Returns the type deduced for the iterator expression. */
9517 cp_parser_perform_range_for_lookup (tree range, tree *begin, tree *end)
9519 if (error_operand_p (range))
9521 *begin = *end = error_mark_node;
9522 return error_mark_node;
9525 if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (range))))
9527 error ("range-based %<for%> expression of type %qT "
9528 "has incomplete type", TREE_TYPE (range));
9529 *begin = *end = error_mark_node;
9530 return error_mark_node;
9532 if (TREE_CODE (TREE_TYPE (range)) == ARRAY_TYPE)
9534 /* If RANGE is an array, we will use pointer arithmetic. */
9536 *end = build_binary_op (input_location, PLUS_EXPR,
9538 array_type_nelts_top (TREE_TYPE (range)),
9540 return build_pointer_type (TREE_TYPE (TREE_TYPE (range)));
9544 /* If it is not an array, we must do a bit of magic. */
9545 tree id_begin, id_end;
9546 tree member_begin, member_end;
9548 *begin = *end = error_mark_node;
9550 id_begin = get_identifier ("begin");
9551 id_end = get_identifier ("end");
9552 member_begin = lookup_member (TREE_TYPE (range), id_begin,
9553 /*protect=*/2, /*want_type=*/false,
9554 tf_warning_or_error);
9555 member_end = lookup_member (TREE_TYPE (range), id_end,
9556 /*protect=*/2, /*want_type=*/false,
9557 tf_warning_or_error);
9559 if (member_begin != NULL_TREE || member_end != NULL_TREE)
9561 /* Use the member functions. */
9562 if (member_begin != NULL_TREE)
9563 *begin = cp_parser_range_for_member_function (range, id_begin);
9565 error ("range-based %<for%> expression of type %qT has an "
9566 "%<end%> member but not a %<begin%>", TREE_TYPE (range));
9568 if (member_end != NULL_TREE)
9569 *end = cp_parser_range_for_member_function (range, id_end);
9571 error ("range-based %<for%> expression of type %qT has a "
9572 "%<begin%> member but not an %<end%>", TREE_TYPE (range));
9576 /* Use global functions with ADL. */
9578 vec = make_tree_vector ();
9580 VEC_safe_push (tree, gc, vec, range);
9582 member_begin = perform_koenig_lookup (id_begin, vec,
9583 /*include_std=*/true,
9584 tf_warning_or_error);
9585 *begin = finish_call_expr (member_begin, &vec, false, true,
9586 tf_warning_or_error);
9587 member_end = perform_koenig_lookup (id_end, vec,
9588 /*include_std=*/true,
9589 tf_warning_or_error);
9590 *end = finish_call_expr (member_end, &vec, false, true,
9591 tf_warning_or_error);
9593 release_tree_vector (vec);
9596 /* Last common checks. */
9597 if (*begin == error_mark_node || *end == error_mark_node)
9599 /* If one of the expressions is an error do no more checks. */
9600 *begin = *end = error_mark_node;
9601 return error_mark_node;
9605 tree iter_type = cv_unqualified (TREE_TYPE (*begin));
9606 /* The unqualified type of the __begin and __end temporaries should
9607 be the same, as required by the multiple auto declaration. */
9608 if (!same_type_p (iter_type, cv_unqualified (TREE_TYPE (*end))))
9609 error ("inconsistent begin/end types in range-based %<for%> "
9610 "statement: %qT and %qT",
9611 TREE_TYPE (*begin), TREE_TYPE (*end));
9617 /* Helper function for cp_parser_perform_range_for_lookup.
9618 Builds a tree for RANGE.IDENTIFIER(). */
9621 cp_parser_range_for_member_function (tree range, tree identifier)
9626 member = finish_class_member_access_expr (range, identifier,
9627 false, tf_warning_or_error);
9628 if (member == error_mark_node)
9629 return error_mark_node;
9631 vec = make_tree_vector ();
9632 res = finish_call_expr (member, &vec,
9633 /*disallow_virtual=*/false,
9635 tf_warning_or_error);
9636 release_tree_vector (vec);
9640 /* Parse an iteration-statement.
9642 iteration-statement:
9643 while ( condition ) statement
9644 do statement while ( expression ) ;
9645 for ( for-init-statement condition [opt] ; expression [opt] )
9648 Returns the new WHILE_STMT, DO_STMT, FOR_STMT or RANGE_FOR_STMT. */
9651 cp_parser_iteration_statement (cp_parser* parser)
9656 unsigned char in_statement;
9658 /* Peek at the next token. */
9659 token = cp_parser_require (parser, CPP_KEYWORD, RT_INTERATION);
9661 return error_mark_node;
9663 /* Remember whether or not we are already within an iteration
9665 in_statement = parser->in_statement;
9667 /* See what kind of keyword it is. */
9668 keyword = token->keyword;
9675 /* Begin the while-statement. */
9676 statement = begin_while_stmt ();
9677 /* Look for the `('. */
9678 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
9679 /* Parse the condition. */
9680 condition = cp_parser_condition (parser);
9681 finish_while_stmt_cond (condition, statement);
9682 /* Look for the `)'. */
9683 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
9684 /* Parse the dependent statement. */
9685 parser->in_statement = IN_ITERATION_STMT;
9686 cp_parser_already_scoped_statement (parser);
9687 parser->in_statement = in_statement;
9688 /* We're done with the while-statement. */
9689 finish_while_stmt (statement);
9697 /* Begin the do-statement. */
9698 statement = begin_do_stmt ();
9699 /* Parse the body of the do-statement. */
9700 parser->in_statement = IN_ITERATION_STMT;
9701 cp_parser_implicitly_scoped_statement (parser, NULL);
9702 parser->in_statement = in_statement;
9703 finish_do_body (statement);
9704 /* Look for the `while' keyword. */
9705 cp_parser_require_keyword (parser, RID_WHILE, RT_WHILE);
9706 /* Look for the `('. */
9707 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
9708 /* Parse the expression. */
9709 expression = cp_parser_expression (parser, /*cast_p=*/false, NULL);
9710 /* We're done with the do-statement. */
9711 finish_do_stmt (expression, statement);
9712 /* Look for the `)'. */
9713 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
9714 /* Look for the `;'. */
9715 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
9721 /* Look for the `('. */
9722 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
9724 statement = cp_parser_for (parser);
9726 /* Look for the `)'. */
9727 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
9729 /* Parse the body of the for-statement. */
9730 parser->in_statement = IN_ITERATION_STMT;
9731 cp_parser_already_scoped_statement (parser);
9732 parser->in_statement = in_statement;
9734 /* We're done with the for-statement. */
9735 finish_for_stmt (statement);
9740 cp_parser_error (parser, "expected iteration-statement");
9741 statement = error_mark_node;
9748 /* Parse a for-init-statement or the declarator of a range-based-for.
9749 Returns true if a range-based-for declaration is seen.
9752 expression-statement
9753 simple-declaration */
9756 cp_parser_for_init_statement (cp_parser* parser, tree *decl)
9758 /* If the next token is a `;', then we have an empty
9759 expression-statement. Grammatically, this is also a
9760 simple-declaration, but an invalid one, because it does not
9761 declare anything. Therefore, if we did not handle this case
9762 specially, we would issue an error message about an invalid
9764 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
9766 bool is_range_for = false;
9767 bool saved_colon_corrects_to_scope_p = parser->colon_corrects_to_scope_p;
9769 parser->colon_corrects_to_scope_p = false;
9771 /* We're going to speculatively look for a declaration, falling back
9772 to an expression, if necessary. */
9773 cp_parser_parse_tentatively (parser);
9774 /* Parse the declaration. */
9775 cp_parser_simple_declaration (parser,
9776 /*function_definition_allowed_p=*/false,
9778 parser->colon_corrects_to_scope_p = saved_colon_corrects_to_scope_p;
9779 if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
9781 /* It is a range-for, consume the ':' */
9782 cp_lexer_consume_token (parser->lexer);
9783 is_range_for = true;
9784 if (cxx_dialect < cxx0x)
9786 error_at (cp_lexer_peek_token (parser->lexer)->location,
9787 "range-based %<for%> loops are not allowed "
9789 *decl = error_mark_node;
9793 /* The ';' is not consumed yet because we told
9794 cp_parser_simple_declaration not to. */
9795 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
9797 if (cp_parser_parse_definitely (parser))
9798 return is_range_for;
9799 /* If the tentative parse failed, then we shall need to look for an
9800 expression-statement. */
9802 /* If we are here, it is an expression-statement. */
9803 cp_parser_expression_statement (parser, NULL_TREE);
9807 /* Parse a jump-statement.
9812 return expression [opt] ;
9813 return braced-init-list ;
9821 Returns the new BREAK_STMT, CONTINUE_STMT, RETURN_EXPR, or GOTO_EXPR. */
9824 cp_parser_jump_statement (cp_parser* parser)
9826 tree statement = error_mark_node;
9829 unsigned char in_statement;
9831 /* Peek at the next token. */
9832 token = cp_parser_require (parser, CPP_KEYWORD, RT_JUMP);
9834 return error_mark_node;
9836 /* See what kind of keyword it is. */
9837 keyword = token->keyword;
9841 in_statement = parser->in_statement & ~IN_IF_STMT;
9842 switch (in_statement)
9845 error_at (token->location, "break statement not within loop or switch");
9848 gcc_assert ((in_statement & IN_SWITCH_STMT)
9849 || in_statement == IN_ITERATION_STMT);
9850 statement = finish_break_stmt ();
9853 error_at (token->location, "invalid exit from OpenMP structured block");
9856 error_at (token->location, "break statement used with OpenMP for loop");
9859 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
9863 switch (parser->in_statement & ~(IN_SWITCH_STMT | IN_IF_STMT))
9866 error_at (token->location, "continue statement not within a loop");
9868 case IN_ITERATION_STMT:
9870 statement = finish_continue_stmt ();
9873 error_at (token->location, "invalid exit from OpenMP structured block");
9878 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
9884 bool expr_non_constant_p;
9886 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
9888 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
9889 expr = cp_parser_braced_list (parser, &expr_non_constant_p);
9891 else if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
9892 expr = cp_parser_expression (parser, /*cast_p=*/false, NULL);
9894 /* If the next token is a `;', then there is no
9897 /* Build the return-statement. */
9898 statement = finish_return_stmt (expr);
9899 /* Look for the final `;'. */
9900 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
9905 /* Create the goto-statement. */
9906 if (cp_lexer_next_token_is (parser->lexer, CPP_MULT))
9908 /* Issue a warning about this use of a GNU extension. */
9909 pedwarn (token->location, OPT_pedantic, "ISO C++ forbids computed gotos");
9910 /* Consume the '*' token. */
9911 cp_lexer_consume_token (parser->lexer);
9912 /* Parse the dependent expression. */
9913 finish_goto_stmt (cp_parser_expression (parser, /*cast_p=*/false, NULL));
9916 finish_goto_stmt (cp_parser_identifier (parser));
9917 /* Look for the final `;'. */
9918 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
9922 cp_parser_error (parser, "expected jump-statement");
9929 /* Parse a declaration-statement.
9931 declaration-statement:
9932 block-declaration */
9935 cp_parser_declaration_statement (cp_parser* parser)
9939 /* Get the high-water mark for the DECLARATOR_OBSTACK. */
9940 p = obstack_alloc (&declarator_obstack, 0);
9942 /* Parse the block-declaration. */
9943 cp_parser_block_declaration (parser, /*statement_p=*/true);
9945 /* Free any declarators allocated. */
9946 obstack_free (&declarator_obstack, p);
9948 /* Finish off the statement. */
9952 /* Some dependent statements (like `if (cond) statement'), are
9953 implicitly in their own scope. In other words, if the statement is
9954 a single statement (as opposed to a compound-statement), it is
9955 none-the-less treated as if it were enclosed in braces. Any
9956 declarations appearing in the dependent statement are out of scope
9957 after control passes that point. This function parses a statement,
9958 but ensures that is in its own scope, even if it is not a
9961 If IF_P is not NULL, *IF_P is set to indicate whether the statement
9962 is a (possibly labeled) if statement which is not enclosed in
9963 braces and has an else clause. This is used to implement
9966 Returns the new statement. */
9969 cp_parser_implicitly_scoped_statement (cp_parser* parser, bool *if_p)
9976 /* Mark if () ; with a special NOP_EXPR. */
9977 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
9979 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
9980 cp_lexer_consume_token (parser->lexer);
9981 statement = add_stmt (build_empty_stmt (loc));
9983 /* if a compound is opened, we simply parse the statement directly. */
9984 else if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
9985 statement = cp_parser_compound_statement (parser, NULL, false, false);
9986 /* If the token is not a `{', then we must take special action. */
9989 /* Create a compound-statement. */
9990 statement = begin_compound_stmt (0);
9991 /* Parse the dependent-statement. */
9992 cp_parser_statement (parser, NULL_TREE, false, if_p);
9993 /* Finish the dummy compound-statement. */
9994 finish_compound_stmt (statement);
9997 /* Return the statement. */
10001 /* For some dependent statements (like `while (cond) statement'), we
10002 have already created a scope. Therefore, even if the dependent
10003 statement is a compound-statement, we do not want to create another
10007 cp_parser_already_scoped_statement (cp_parser* parser)
10009 /* If the token is a `{', then we must take special action. */
10010 if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE))
10011 cp_parser_statement (parser, NULL_TREE, false, NULL);
10014 /* Avoid calling cp_parser_compound_statement, so that we
10015 don't create a new scope. Do everything else by hand. */
10016 cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE);
10017 /* If the next keyword is `__label__' we have a label declaration. */
10018 while (cp_lexer_next_token_is_keyword (parser->lexer, RID_LABEL))
10019 cp_parser_label_declaration (parser);
10020 /* Parse an (optional) statement-seq. */
10021 cp_parser_statement_seq_opt (parser, NULL_TREE);
10022 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
10026 /* Declarations [gram.dcl.dcl] */
10028 /* Parse an optional declaration-sequence.
10032 declaration-seq declaration */
10035 cp_parser_declaration_seq_opt (cp_parser* parser)
10041 token = cp_lexer_peek_token (parser->lexer);
10043 if (token->type == CPP_CLOSE_BRACE
10044 || token->type == CPP_EOF
10045 || token->type == CPP_PRAGMA_EOL)
10048 if (token->type == CPP_SEMICOLON)
10050 /* A declaration consisting of a single semicolon is
10051 invalid. Allow it unless we're being pedantic. */
10052 cp_lexer_consume_token (parser->lexer);
10053 if (!in_system_header)
10054 pedwarn (input_location, OPT_pedantic, "extra %<;%>");
10058 /* If we're entering or exiting a region that's implicitly
10059 extern "C", modify the lang context appropriately. */
10060 if (!parser->implicit_extern_c && token->implicit_extern_c)
10062 push_lang_context (lang_name_c);
10063 parser->implicit_extern_c = true;
10065 else if (parser->implicit_extern_c && !token->implicit_extern_c)
10067 pop_lang_context ();
10068 parser->implicit_extern_c = false;
10071 if (token->type == CPP_PRAGMA)
10073 /* A top-level declaration can consist solely of a #pragma.
10074 A nested declaration cannot, so this is done here and not
10075 in cp_parser_declaration. (A #pragma at block scope is
10076 handled in cp_parser_statement.) */
10077 cp_parser_pragma (parser, pragma_external);
10081 /* Parse the declaration itself. */
10082 cp_parser_declaration (parser);
10086 /* Parse a declaration.
10090 function-definition
10091 template-declaration
10092 explicit-instantiation
10093 explicit-specialization
10094 linkage-specification
10095 namespace-definition
10100 __extension__ declaration */
10103 cp_parser_declaration (cp_parser* parser)
10107 int saved_pedantic;
10109 tree attributes = NULL_TREE;
10111 /* Check for the `__extension__' keyword. */
10112 if (cp_parser_extension_opt (parser, &saved_pedantic))
10114 /* Parse the qualified declaration. */
10115 cp_parser_declaration (parser);
10116 /* Restore the PEDANTIC flag. */
10117 pedantic = saved_pedantic;
10122 /* Try to figure out what kind of declaration is present. */
10123 token1 = *cp_lexer_peek_token (parser->lexer);
10125 if (token1.type != CPP_EOF)
10126 token2 = *cp_lexer_peek_nth_token (parser->lexer, 2);
10129 token2.type = CPP_EOF;
10130 token2.keyword = RID_MAX;
10133 /* Get the high-water mark for the DECLARATOR_OBSTACK. */
10134 p = obstack_alloc (&declarator_obstack, 0);
10136 /* If the next token is `extern' and the following token is a string
10137 literal, then we have a linkage specification. */
10138 if (token1.keyword == RID_EXTERN
10139 && cp_parser_is_pure_string_literal (&token2))
10140 cp_parser_linkage_specification (parser);
10141 /* If the next token is `template', then we have either a template
10142 declaration, an explicit instantiation, or an explicit
10144 else if (token1.keyword == RID_TEMPLATE)
10146 /* `template <>' indicates a template specialization. */
10147 if (token2.type == CPP_LESS
10148 && cp_lexer_peek_nth_token (parser->lexer, 3)->type == CPP_GREATER)
10149 cp_parser_explicit_specialization (parser);
10150 /* `template <' indicates a template declaration. */
10151 else if (token2.type == CPP_LESS)
10152 cp_parser_template_declaration (parser, /*member_p=*/false);
10153 /* Anything else must be an explicit instantiation. */
10155 cp_parser_explicit_instantiation (parser);
10157 /* If the next token is `export', then we have a template
10159 else if (token1.keyword == RID_EXPORT)
10160 cp_parser_template_declaration (parser, /*member_p=*/false);
10161 /* If the next token is `extern', 'static' or 'inline' and the one
10162 after that is `template', we have a GNU extended explicit
10163 instantiation directive. */
10164 else if (cp_parser_allow_gnu_extensions_p (parser)
10165 && (token1.keyword == RID_EXTERN
10166 || token1.keyword == RID_STATIC
10167 || token1.keyword == RID_INLINE)
10168 && token2.keyword == RID_TEMPLATE)
10169 cp_parser_explicit_instantiation (parser);
10170 /* If the next token is `namespace', check for a named or unnamed
10171 namespace definition. */
10172 else if (token1.keyword == RID_NAMESPACE
10173 && (/* A named namespace definition. */
10174 (token2.type == CPP_NAME
10175 && (cp_lexer_peek_nth_token (parser->lexer, 3)->type
10177 /* An unnamed namespace definition. */
10178 || token2.type == CPP_OPEN_BRACE
10179 || token2.keyword == RID_ATTRIBUTE))
10180 cp_parser_namespace_definition (parser);
10181 /* An inline (associated) namespace definition. */
10182 else if (token1.keyword == RID_INLINE
10183 && token2.keyword == RID_NAMESPACE)
10184 cp_parser_namespace_definition (parser);
10185 /* Objective-C++ declaration/definition. */
10186 else if (c_dialect_objc () && OBJC_IS_AT_KEYWORD (token1.keyword))
10187 cp_parser_objc_declaration (parser, NULL_TREE);
10188 else if (c_dialect_objc ()
10189 && token1.keyword == RID_ATTRIBUTE
10190 && cp_parser_objc_valid_prefix_attributes (parser, &attributes))
10191 cp_parser_objc_declaration (parser, attributes);
10192 /* We must have either a block declaration or a function
10195 /* Try to parse a block-declaration, or a function-definition. */
10196 cp_parser_block_declaration (parser, /*statement_p=*/false);
10198 /* Free any declarators allocated. */
10199 obstack_free (&declarator_obstack, p);
10202 /* Parse a block-declaration.
10207 namespace-alias-definition
10214 __extension__ block-declaration
10219 static_assert-declaration
10221 If STATEMENT_P is TRUE, then this block-declaration is occurring as
10222 part of a declaration-statement. */
10225 cp_parser_block_declaration (cp_parser *parser,
10229 int saved_pedantic;
10231 /* Check for the `__extension__' keyword. */
10232 if (cp_parser_extension_opt (parser, &saved_pedantic))
10234 /* Parse the qualified declaration. */
10235 cp_parser_block_declaration (parser, statement_p);
10236 /* Restore the PEDANTIC flag. */
10237 pedantic = saved_pedantic;
10242 /* Peek at the next token to figure out which kind of declaration is
10244 token1 = cp_lexer_peek_token (parser->lexer);
10246 /* If the next keyword is `asm', we have an asm-definition. */
10247 if (token1->keyword == RID_ASM)
10250 cp_parser_commit_to_tentative_parse (parser);
10251 cp_parser_asm_definition (parser);
10253 /* If the next keyword is `namespace', we have a
10254 namespace-alias-definition. */
10255 else if (token1->keyword == RID_NAMESPACE)
10256 cp_parser_namespace_alias_definition (parser);
10257 /* If the next keyword is `using', we have a
10258 using-declaration, a using-directive, or an alias-declaration. */
10259 else if (token1->keyword == RID_USING)
10264 cp_parser_commit_to_tentative_parse (parser);
10265 /* If the token after `using' is `namespace', then we have a
10266 using-directive. */
10267 token2 = cp_lexer_peek_nth_token (parser->lexer, 2);
10268 if (token2->keyword == RID_NAMESPACE)
10269 cp_parser_using_directive (parser);
10270 /* If the second token after 'using' is '=', then we have an
10271 alias-declaration. */
10272 else if (cxx_dialect >= cxx0x
10273 && token2->type == CPP_NAME
10274 && ((cp_lexer_peek_nth_token (parser->lexer, 3)->type == CPP_EQ)
10275 || (cp_lexer_peek_nth_token (parser->lexer, 3)->keyword
10276 == RID_ATTRIBUTE)))
10277 cp_parser_alias_declaration (parser);
10278 /* Otherwise, it's a using-declaration. */
10280 cp_parser_using_declaration (parser,
10281 /*access_declaration_p=*/false);
10283 /* If the next keyword is `__label__' we have a misplaced label
10285 else if (token1->keyword == RID_LABEL)
10287 cp_lexer_consume_token (parser->lexer);
10288 error_at (token1->location, "%<__label__%> not at the beginning of a block");
10289 cp_parser_skip_to_end_of_statement (parser);
10290 /* If the next token is now a `;', consume it. */
10291 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
10292 cp_lexer_consume_token (parser->lexer);
10294 /* If the next token is `static_assert' we have a static assertion. */
10295 else if (token1->keyword == RID_STATIC_ASSERT)
10296 cp_parser_static_assert (parser, /*member_p=*/false);
10297 /* Anything else must be a simple-declaration. */
10299 cp_parser_simple_declaration (parser, !statement_p,
10300 /*maybe_range_for_decl*/NULL);
10303 /* Parse a simple-declaration.
10305 simple-declaration:
10306 decl-specifier-seq [opt] init-declarator-list [opt] ;
10308 init-declarator-list:
10310 init-declarator-list , init-declarator
10312 If FUNCTION_DEFINITION_ALLOWED_P is TRUE, then we also recognize a
10313 function-definition as a simple-declaration.
10315 If MAYBE_RANGE_FOR_DECL is not NULL, the pointed tree will be set to the
10316 parsed declaration if it is an uninitialized single declarator not followed
10317 by a `;', or to error_mark_node otherwise. Either way, the trailing `;',
10318 if present, will not be consumed. */
10321 cp_parser_simple_declaration (cp_parser* parser,
10322 bool function_definition_allowed_p,
10323 tree *maybe_range_for_decl)
10325 cp_decl_specifier_seq decl_specifiers;
10326 int declares_class_or_enum;
10327 bool saw_declarator;
10329 if (maybe_range_for_decl)
10330 *maybe_range_for_decl = NULL_TREE;
10332 /* Defer access checks until we know what is being declared; the
10333 checks for names appearing in the decl-specifier-seq should be
10334 done as if we were in the scope of the thing being declared. */
10335 push_deferring_access_checks (dk_deferred);
10337 /* Parse the decl-specifier-seq. We have to keep track of whether
10338 or not the decl-specifier-seq declares a named class or
10339 enumeration type, since that is the only case in which the
10340 init-declarator-list is allowed to be empty.
10344 In a simple-declaration, the optional init-declarator-list can be
10345 omitted only when declaring a class or enumeration, that is when
10346 the decl-specifier-seq contains either a class-specifier, an
10347 elaborated-type-specifier, or an enum-specifier. */
10348 cp_parser_decl_specifier_seq (parser,
10349 CP_PARSER_FLAGS_OPTIONAL,
10351 &declares_class_or_enum);
10352 /* We no longer need to defer access checks. */
10353 stop_deferring_access_checks ();
10355 /* In a block scope, a valid declaration must always have a
10356 decl-specifier-seq. By not trying to parse declarators, we can
10357 resolve the declaration/expression ambiguity more quickly. */
10358 if (!function_definition_allowed_p
10359 && !decl_specifiers.any_specifiers_p)
10361 cp_parser_error (parser, "expected declaration");
10365 /* If the next two tokens are both identifiers, the code is
10366 erroneous. The usual cause of this situation is code like:
10370 where "T" should name a type -- but does not. */
10371 if (!decl_specifiers.any_type_specifiers_p
10372 && cp_parser_parse_and_diagnose_invalid_type_name (parser))
10374 /* If parsing tentatively, we should commit; we really are
10375 looking at a declaration. */
10376 cp_parser_commit_to_tentative_parse (parser);
10381 /* If we have seen at least one decl-specifier, and the next token
10382 is not a parenthesis, then we must be looking at a declaration.
10383 (After "int (" we might be looking at a functional cast.) */
10384 if (decl_specifiers.any_specifiers_p
10385 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_PAREN)
10386 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE)
10387 && !cp_parser_error_occurred (parser))
10388 cp_parser_commit_to_tentative_parse (parser);
10390 /* Keep going until we hit the `;' at the end of the simple
10392 saw_declarator = false;
10393 while (cp_lexer_next_token_is_not (parser->lexer,
10397 bool function_definition_p;
10400 if (saw_declarator)
10402 /* If we are processing next declarator, coma is expected */
10403 token = cp_lexer_peek_token (parser->lexer);
10404 gcc_assert (token->type == CPP_COMMA);
10405 cp_lexer_consume_token (parser->lexer);
10406 if (maybe_range_for_decl)
10407 *maybe_range_for_decl = error_mark_node;
10410 saw_declarator = true;
10412 /* Parse the init-declarator. */
10413 decl = cp_parser_init_declarator (parser, &decl_specifiers,
10415 function_definition_allowed_p,
10416 /*member_p=*/false,
10417 declares_class_or_enum,
10418 &function_definition_p,
10419 maybe_range_for_decl);
10420 /* If an error occurred while parsing tentatively, exit quickly.
10421 (That usually happens when in the body of a function; each
10422 statement is treated as a declaration-statement until proven
10424 if (cp_parser_error_occurred (parser))
10426 /* Handle function definitions specially. */
10427 if (function_definition_p)
10429 /* If the next token is a `,', then we are probably
10430 processing something like:
10434 which is erroneous. */
10435 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
10437 cp_token *token = cp_lexer_peek_token (parser->lexer);
10438 error_at (token->location,
10440 " declarations and function-definitions is forbidden");
10442 /* Otherwise, we're done with the list of declarators. */
10445 pop_deferring_access_checks ();
10449 if (maybe_range_for_decl && *maybe_range_for_decl == NULL_TREE)
10450 *maybe_range_for_decl = decl;
10451 /* The next token should be either a `,' or a `;'. */
10452 token = cp_lexer_peek_token (parser->lexer);
10453 /* If it's a `,', there are more declarators to come. */
10454 if (token->type == CPP_COMMA)
10455 /* will be consumed next time around */;
10456 /* If it's a `;', we are done. */
10457 else if (token->type == CPP_SEMICOLON || maybe_range_for_decl)
10459 /* Anything else is an error. */
10462 /* If we have already issued an error message we don't need
10463 to issue another one. */
10464 if (decl != error_mark_node
10465 || cp_parser_uncommitted_to_tentative_parse_p (parser))
10466 cp_parser_error (parser, "expected %<,%> or %<;%>");
10467 /* Skip tokens until we reach the end of the statement. */
10468 cp_parser_skip_to_end_of_statement (parser);
10469 /* If the next token is now a `;', consume it. */
10470 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
10471 cp_lexer_consume_token (parser->lexer);
10474 /* After the first time around, a function-definition is not
10475 allowed -- even if it was OK at first. For example:
10480 function_definition_allowed_p = false;
10483 /* Issue an error message if no declarators are present, and the
10484 decl-specifier-seq does not itself declare a class or
10486 if (!saw_declarator)
10488 if (cp_parser_declares_only_class_p (parser))
10489 shadow_tag (&decl_specifiers);
10490 /* Perform any deferred access checks. */
10491 perform_deferred_access_checks ();
10494 /* Consume the `;'. */
10495 if (!maybe_range_for_decl)
10496 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
10499 pop_deferring_access_checks ();
10502 /* Parse a decl-specifier-seq.
10504 decl-specifier-seq:
10505 decl-specifier-seq [opt] decl-specifier
10508 storage-class-specifier
10519 Set *DECL_SPECS to a representation of the decl-specifier-seq.
10521 The parser flags FLAGS is used to control type-specifier parsing.
10523 *DECLARES_CLASS_OR_ENUM is set to the bitwise or of the following
10526 1: one of the decl-specifiers is an elaborated-type-specifier
10527 (i.e., a type declaration)
10528 2: one of the decl-specifiers is an enum-specifier or a
10529 class-specifier (i.e., a type definition)
10534 cp_parser_decl_specifier_seq (cp_parser* parser,
10535 cp_parser_flags flags,
10536 cp_decl_specifier_seq *decl_specs,
10537 int* declares_class_or_enum)
10539 bool constructor_possible_p = !parser->in_declarator_p;
10540 cp_token *start_token = NULL;
10542 /* Clear DECL_SPECS. */
10543 clear_decl_specs (decl_specs);
10545 /* Assume no class or enumeration type is declared. */
10546 *declares_class_or_enum = 0;
10548 /* Keep reading specifiers until there are no more to read. */
10551 bool constructor_p;
10552 bool found_decl_spec;
10555 /* Peek at the next token. */
10556 token = cp_lexer_peek_token (parser->lexer);
10558 /* Save the first token of the decl spec list for error
10561 start_token = token;
10562 /* Handle attributes. */
10563 if (token->keyword == RID_ATTRIBUTE)
10565 /* Parse the attributes. */
10566 decl_specs->attributes
10567 = chainon (decl_specs->attributes,
10568 cp_parser_attributes_opt (parser));
10571 /* Assume we will find a decl-specifier keyword. */
10572 found_decl_spec = true;
10573 /* If the next token is an appropriate keyword, we can simply
10574 add it to the list. */
10575 switch (token->keyword)
10581 if (!at_class_scope_p ())
10583 error_at (token->location, "%<friend%> used outside of class");
10584 cp_lexer_purge_token (parser->lexer);
10588 ++decl_specs->specs[(int) ds_friend];
10589 /* Consume the token. */
10590 cp_lexer_consume_token (parser->lexer);
10594 case RID_CONSTEXPR:
10595 ++decl_specs->specs[(int) ds_constexpr];
10596 cp_lexer_consume_token (parser->lexer);
10599 /* function-specifier:
10606 cp_parser_function_specifier_opt (parser, decl_specs);
10612 ++decl_specs->specs[(int) ds_typedef];
10613 /* Consume the token. */
10614 cp_lexer_consume_token (parser->lexer);
10615 /* A constructor declarator cannot appear in a typedef. */
10616 constructor_possible_p = false;
10617 /* The "typedef" keyword can only occur in a declaration; we
10618 may as well commit at this point. */
10619 cp_parser_commit_to_tentative_parse (parser);
10621 if (decl_specs->storage_class != sc_none)
10622 decl_specs->conflicting_specifiers_p = true;
10625 /* storage-class-specifier:
10635 if (cxx_dialect == cxx98)
10637 /* Consume the token. */
10638 cp_lexer_consume_token (parser->lexer);
10640 /* Complain about `auto' as a storage specifier, if
10641 we're complaining about C++0x compatibility. */
10642 warning_at (token->location, OPT_Wc__0x_compat, "%<auto%>"
10643 " changes meaning in C++11; please remove it");
10645 /* Set the storage class anyway. */
10646 cp_parser_set_storage_class (parser, decl_specs, RID_AUTO,
10650 /* C++0x auto type-specifier. */
10651 found_decl_spec = false;
10658 /* Consume the token. */
10659 cp_lexer_consume_token (parser->lexer);
10660 cp_parser_set_storage_class (parser, decl_specs, token->keyword,
10664 /* Consume the token. */
10665 cp_lexer_consume_token (parser->lexer);
10666 ++decl_specs->specs[(int) ds_thread];
10670 /* We did not yet find a decl-specifier yet. */
10671 found_decl_spec = false;
10675 if (found_decl_spec
10676 && (flags & CP_PARSER_FLAGS_ONLY_TYPE_OR_CONSTEXPR)
10677 && token->keyword != RID_CONSTEXPR)
10678 error ("decl-specifier invalid in condition");
10680 /* Constructors are a special case. The `S' in `S()' is not a
10681 decl-specifier; it is the beginning of the declarator. */
10683 = (!found_decl_spec
10684 && constructor_possible_p
10685 && (cp_parser_constructor_declarator_p
10686 (parser, decl_specs->specs[(int) ds_friend] != 0)));
10688 /* If we don't have a DECL_SPEC yet, then we must be looking at
10689 a type-specifier. */
10690 if (!found_decl_spec && !constructor_p)
10692 int decl_spec_declares_class_or_enum;
10693 bool is_cv_qualifier;
10697 = cp_parser_type_specifier (parser, flags,
10699 /*is_declaration=*/true,
10700 &decl_spec_declares_class_or_enum,
10702 *declares_class_or_enum |= decl_spec_declares_class_or_enum;
10704 /* If this type-specifier referenced a user-defined type
10705 (a typedef, class-name, etc.), then we can't allow any
10706 more such type-specifiers henceforth.
10710 The longest sequence of decl-specifiers that could
10711 possibly be a type name is taken as the
10712 decl-specifier-seq of a declaration. The sequence shall
10713 be self-consistent as described below.
10717 As a general rule, at most one type-specifier is allowed
10718 in the complete decl-specifier-seq of a declaration. The
10719 only exceptions are the following:
10721 -- const or volatile can be combined with any other
10724 -- signed or unsigned can be combined with char, long,
10732 void g (const int Pc);
10734 Here, Pc is *not* part of the decl-specifier seq; it's
10735 the declarator. Therefore, once we see a type-specifier
10736 (other than a cv-qualifier), we forbid any additional
10737 user-defined types. We *do* still allow things like `int
10738 int' to be considered a decl-specifier-seq, and issue the
10739 error message later. */
10740 if (type_spec && !is_cv_qualifier)
10741 flags |= CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES;
10742 /* A constructor declarator cannot follow a type-specifier. */
10745 constructor_possible_p = false;
10746 found_decl_spec = true;
10747 if (!is_cv_qualifier)
10748 decl_specs->any_type_specifiers_p = true;
10752 /* If we still do not have a DECL_SPEC, then there are no more
10753 decl-specifiers. */
10754 if (!found_decl_spec)
10757 decl_specs->any_specifiers_p = true;
10758 /* After we see one decl-specifier, further decl-specifiers are
10759 always optional. */
10760 flags |= CP_PARSER_FLAGS_OPTIONAL;
10763 cp_parser_check_decl_spec (decl_specs, start_token->location);
10765 /* Don't allow a friend specifier with a class definition. */
10766 if (decl_specs->specs[(int) ds_friend] != 0
10767 && (*declares_class_or_enum & 2))
10768 error_at (start_token->location,
10769 "class definition may not be declared a friend");
10772 /* Parse an (optional) storage-class-specifier.
10774 storage-class-specifier:
10783 storage-class-specifier:
10786 Returns an IDENTIFIER_NODE corresponding to the keyword used. */
10789 cp_parser_storage_class_specifier_opt (cp_parser* parser)
10791 switch (cp_lexer_peek_token (parser->lexer)->keyword)
10794 if (cxx_dialect != cxx98)
10796 /* Fall through for C++98. */
10803 /* Consume the token. */
10804 return cp_lexer_consume_token (parser->lexer)->u.value;
10811 /* Parse an (optional) function-specifier.
10813 function-specifier:
10818 Returns an IDENTIFIER_NODE corresponding to the keyword used.
10819 Updates DECL_SPECS, if it is non-NULL. */
10822 cp_parser_function_specifier_opt (cp_parser* parser,
10823 cp_decl_specifier_seq *decl_specs)
10825 cp_token *token = cp_lexer_peek_token (parser->lexer);
10826 switch (token->keyword)
10830 ++decl_specs->specs[(int) ds_inline];
10834 /* 14.5.2.3 [temp.mem]
10836 A member function template shall not be virtual. */
10837 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
10838 error_at (token->location, "templates may not be %<virtual%>");
10839 else if (decl_specs)
10840 ++decl_specs->specs[(int) ds_virtual];
10845 ++decl_specs->specs[(int) ds_explicit];
10852 /* Consume the token. */
10853 return cp_lexer_consume_token (parser->lexer)->u.value;
10856 /* Parse a linkage-specification.
10858 linkage-specification:
10859 extern string-literal { declaration-seq [opt] }
10860 extern string-literal declaration */
10863 cp_parser_linkage_specification (cp_parser* parser)
10867 /* Look for the `extern' keyword. */
10868 cp_parser_require_keyword (parser, RID_EXTERN, RT_EXTERN);
10870 /* Look for the string-literal. */
10871 linkage = cp_parser_string_literal (parser, false, false);
10873 /* Transform the literal into an identifier. If the literal is a
10874 wide-character string, or contains embedded NULs, then we can't
10875 handle it as the user wants. */
10876 if (strlen (TREE_STRING_POINTER (linkage))
10877 != (size_t) (TREE_STRING_LENGTH (linkage) - 1))
10879 cp_parser_error (parser, "invalid linkage-specification");
10880 /* Assume C++ linkage. */
10881 linkage = lang_name_cplusplus;
10884 linkage = get_identifier (TREE_STRING_POINTER (linkage));
10886 /* We're now using the new linkage. */
10887 push_lang_context (linkage);
10889 /* If the next token is a `{', then we're using the first
10891 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
10893 /* Consume the `{' token. */
10894 cp_lexer_consume_token (parser->lexer);
10895 /* Parse the declarations. */
10896 cp_parser_declaration_seq_opt (parser);
10897 /* Look for the closing `}'. */
10898 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
10900 /* Otherwise, there's just one declaration. */
10903 bool saved_in_unbraced_linkage_specification_p;
10905 saved_in_unbraced_linkage_specification_p
10906 = parser->in_unbraced_linkage_specification_p;
10907 parser->in_unbraced_linkage_specification_p = true;
10908 cp_parser_declaration (parser);
10909 parser->in_unbraced_linkage_specification_p
10910 = saved_in_unbraced_linkage_specification_p;
10913 /* We're done with the linkage-specification. */
10914 pop_lang_context ();
10917 /* Parse a static_assert-declaration.
10919 static_assert-declaration:
10920 static_assert ( constant-expression , string-literal ) ;
10922 If MEMBER_P, this static_assert is a class member. */
10925 cp_parser_static_assert(cp_parser *parser, bool member_p)
10930 location_t saved_loc;
10933 /* Peek at the `static_assert' token so we can keep track of exactly
10934 where the static assertion started. */
10935 token = cp_lexer_peek_token (parser->lexer);
10936 saved_loc = token->location;
10938 /* Look for the `static_assert' keyword. */
10939 if (!cp_parser_require_keyword (parser, RID_STATIC_ASSERT,
10943 /* We know we are in a static assertion; commit to any tentative
10945 if (cp_parser_parsing_tentatively (parser))
10946 cp_parser_commit_to_tentative_parse (parser);
10948 /* Parse the `(' starting the static assertion condition. */
10949 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
10951 /* Parse the constant-expression. Allow a non-constant expression
10952 here in order to give better diagnostics in finish_static_assert. */
10954 cp_parser_constant_expression (parser,
10955 /*allow_non_constant_p=*/true,
10956 /*non_constant_p=*/&dummy);
10958 /* Parse the separating `,'. */
10959 cp_parser_require (parser, CPP_COMMA, RT_COMMA);
10961 /* Parse the string-literal message. */
10962 message = cp_parser_string_literal (parser,
10963 /*translate=*/false,
10966 /* A `)' completes the static assertion. */
10967 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
10968 cp_parser_skip_to_closing_parenthesis (parser,
10969 /*recovering=*/true,
10970 /*or_comma=*/false,
10971 /*consume_paren=*/true);
10973 /* A semicolon terminates the declaration. */
10974 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
10976 /* Complete the static assertion, which may mean either processing
10977 the static assert now or saving it for template instantiation. */
10978 finish_static_assert (condition, message, saved_loc, member_p);
10981 /* Parse a `decltype' type. Returns the type.
10983 simple-type-specifier:
10984 decltype ( expression ) */
10987 cp_parser_decltype (cp_parser *parser)
10990 bool id_expression_or_member_access_p = false;
10991 const char *saved_message;
10992 bool saved_integral_constant_expression_p;
10993 bool saved_non_integral_constant_expression_p;
10994 cp_token *id_expr_start_token;
10995 cp_token *start_token = cp_lexer_peek_token (parser->lexer);
10997 if (start_token->type == CPP_DECLTYPE)
10999 /* Already parsed. */
11000 cp_lexer_consume_token (parser->lexer);
11001 return start_token->u.value;
11004 /* Look for the `decltype' token. */
11005 if (!cp_parser_require_keyword (parser, RID_DECLTYPE, RT_DECLTYPE))
11006 return error_mark_node;
11008 /* Types cannot be defined in a `decltype' expression. Save away the
11010 saved_message = parser->type_definition_forbidden_message;
11012 /* And create the new one. */
11013 parser->type_definition_forbidden_message
11014 = G_("types may not be defined in %<decltype%> expressions");
11016 /* The restrictions on constant-expressions do not apply inside
11017 decltype expressions. */
11018 saved_integral_constant_expression_p
11019 = parser->integral_constant_expression_p;
11020 saved_non_integral_constant_expression_p
11021 = parser->non_integral_constant_expression_p;
11022 parser->integral_constant_expression_p = false;
11024 /* Do not actually evaluate the expression. */
11025 ++cp_unevaluated_operand;
11027 /* Do not warn about problems with the expression. */
11028 ++c_inhibit_evaluation_warnings;
11030 /* Parse the opening `('. */
11031 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
11032 return error_mark_node;
11034 /* First, try parsing an id-expression. */
11035 id_expr_start_token = cp_lexer_peek_token (parser->lexer);
11036 cp_parser_parse_tentatively (parser);
11037 expr = cp_parser_id_expression (parser,
11038 /*template_keyword_p=*/false,
11039 /*check_dependency_p=*/true,
11040 /*template_p=*/NULL,
11041 /*declarator_p=*/false,
11042 /*optional_p=*/false);
11044 if (!cp_parser_error_occurred (parser) && expr != error_mark_node)
11046 bool non_integral_constant_expression_p = false;
11047 tree id_expression = expr;
11049 const char *error_msg;
11051 if (TREE_CODE (expr) == IDENTIFIER_NODE)
11052 /* Lookup the name we got back from the id-expression. */
11053 expr = cp_parser_lookup_name (parser, expr,
11055 /*is_template=*/false,
11056 /*is_namespace=*/false,
11057 /*check_dependency=*/true,
11058 /*ambiguous_decls=*/NULL,
11059 id_expr_start_token->location);
11062 && expr != error_mark_node
11063 && TREE_CODE (expr) != TEMPLATE_ID_EXPR
11064 && TREE_CODE (expr) != TYPE_DECL
11065 && (TREE_CODE (expr) != BIT_NOT_EXPR
11066 || !TYPE_P (TREE_OPERAND (expr, 0)))
11067 && cp_lexer_peek_token (parser->lexer)->type == CPP_CLOSE_PAREN)
11069 /* Complete lookup of the id-expression. */
11070 expr = (finish_id_expression
11071 (id_expression, expr, parser->scope, &idk,
11072 /*integral_constant_expression_p=*/false,
11073 /*allow_non_integral_constant_expression_p=*/true,
11074 &non_integral_constant_expression_p,
11075 /*template_p=*/false,
11077 /*address_p=*/false,
11078 /*template_arg_p=*/false,
11080 id_expr_start_token->location));
11082 if (expr == error_mark_node)
11083 /* We found an id-expression, but it was something that we
11084 should not have found. This is an error, not something
11085 we can recover from, so note that we found an
11086 id-expression and we'll recover as gracefully as
11088 id_expression_or_member_access_p = true;
11092 && expr != error_mark_node
11093 && cp_lexer_peek_token (parser->lexer)->type == CPP_CLOSE_PAREN)
11094 /* We have an id-expression. */
11095 id_expression_or_member_access_p = true;
11098 if (!id_expression_or_member_access_p)
11100 /* Abort the id-expression parse. */
11101 cp_parser_abort_tentative_parse (parser);
11103 /* Parsing tentatively, again. */
11104 cp_parser_parse_tentatively (parser);
11106 /* Parse a class member access. */
11107 expr = cp_parser_postfix_expression (parser, /*address_p=*/false,
11109 /*member_access_only_p=*/true, NULL);
11112 && expr != error_mark_node
11113 && cp_lexer_peek_token (parser->lexer)->type == CPP_CLOSE_PAREN)
11114 /* We have an id-expression. */
11115 id_expression_or_member_access_p = true;
11118 if (id_expression_or_member_access_p)
11119 /* We have parsed the complete id-expression or member access. */
11120 cp_parser_parse_definitely (parser);
11123 bool saved_greater_than_is_operator_p;
11125 /* Abort our attempt to parse an id-expression or member access
11127 cp_parser_abort_tentative_parse (parser);
11129 /* Within a parenthesized expression, a `>' token is always
11130 the greater-than operator. */
11131 saved_greater_than_is_operator_p
11132 = parser->greater_than_is_operator_p;
11133 parser->greater_than_is_operator_p = true;
11135 /* Parse a full expression. */
11136 expr = cp_parser_expression (parser, /*cast_p=*/false, NULL);
11138 /* The `>' token might be the end of a template-id or
11139 template-parameter-list now. */
11140 parser->greater_than_is_operator_p
11141 = saved_greater_than_is_operator_p;
11144 /* Go back to evaluating expressions. */
11145 --cp_unevaluated_operand;
11146 --c_inhibit_evaluation_warnings;
11148 /* Restore the old message and the integral constant expression
11150 parser->type_definition_forbidden_message = saved_message;
11151 parser->integral_constant_expression_p
11152 = saved_integral_constant_expression_p;
11153 parser->non_integral_constant_expression_p
11154 = saved_non_integral_constant_expression_p;
11156 /* Parse to the closing `)'. */
11157 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
11159 cp_parser_skip_to_closing_parenthesis (parser, true, false,
11160 /*consume_paren=*/true);
11161 return error_mark_node;
11164 expr = finish_decltype_type (expr, id_expression_or_member_access_p,
11165 tf_warning_or_error);
11167 /* Replace the decltype with a CPP_DECLTYPE so we don't need to parse
11169 start_token->type = CPP_DECLTYPE;
11170 start_token->u.value = expr;
11171 start_token->keyword = RID_MAX;
11172 cp_lexer_purge_tokens_after (parser->lexer, start_token);
11177 /* Special member functions [gram.special] */
11179 /* Parse a conversion-function-id.
11181 conversion-function-id:
11182 operator conversion-type-id
11184 Returns an IDENTIFIER_NODE representing the operator. */
11187 cp_parser_conversion_function_id (cp_parser* parser)
11191 tree saved_qualifying_scope;
11192 tree saved_object_scope;
11193 tree pushed_scope = NULL_TREE;
11195 /* Look for the `operator' token. */
11196 if (!cp_parser_require_keyword (parser, RID_OPERATOR, RT_OPERATOR))
11197 return error_mark_node;
11198 /* When we parse the conversion-type-id, the current scope will be
11199 reset. However, we need that information in able to look up the
11200 conversion function later, so we save it here. */
11201 saved_scope = parser->scope;
11202 saved_qualifying_scope = parser->qualifying_scope;
11203 saved_object_scope = parser->object_scope;
11204 /* We must enter the scope of the class so that the names of
11205 entities declared within the class are available in the
11206 conversion-type-id. For example, consider:
11213 S::operator I() { ... }
11215 In order to see that `I' is a type-name in the definition, we
11216 must be in the scope of `S'. */
11218 pushed_scope = push_scope (saved_scope);
11219 /* Parse the conversion-type-id. */
11220 type = cp_parser_conversion_type_id (parser);
11221 /* Leave the scope of the class, if any. */
11223 pop_scope (pushed_scope);
11224 /* Restore the saved scope. */
11225 parser->scope = saved_scope;
11226 parser->qualifying_scope = saved_qualifying_scope;
11227 parser->object_scope = saved_object_scope;
11228 /* If the TYPE is invalid, indicate failure. */
11229 if (type == error_mark_node)
11230 return error_mark_node;
11231 return mangle_conv_op_name_for_type (type);
11234 /* Parse a conversion-type-id:
11236 conversion-type-id:
11237 type-specifier-seq conversion-declarator [opt]
11239 Returns the TYPE specified. */
11242 cp_parser_conversion_type_id (cp_parser* parser)
11245 cp_decl_specifier_seq type_specifiers;
11246 cp_declarator *declarator;
11247 tree type_specified;
11249 /* Parse the attributes. */
11250 attributes = cp_parser_attributes_opt (parser);
11251 /* Parse the type-specifiers. */
11252 cp_parser_type_specifier_seq (parser, /*is_declaration=*/false,
11253 /*is_trailing_return=*/false,
11255 /* If that didn't work, stop. */
11256 if (type_specifiers.type == error_mark_node)
11257 return error_mark_node;
11258 /* Parse the conversion-declarator. */
11259 declarator = cp_parser_conversion_declarator_opt (parser);
11261 type_specified = grokdeclarator (declarator, &type_specifiers, TYPENAME,
11262 /*initialized=*/0, &attributes);
11264 cplus_decl_attributes (&type_specified, attributes, /*flags=*/0);
11266 /* Don't give this error when parsing tentatively. This happens to
11267 work because we always parse this definitively once. */
11268 if (! cp_parser_uncommitted_to_tentative_parse_p (parser)
11269 && type_uses_auto (type_specified))
11271 error ("invalid use of %<auto%> in conversion operator");
11272 return error_mark_node;
11275 return type_specified;
11278 /* Parse an (optional) conversion-declarator.
11280 conversion-declarator:
11281 ptr-operator conversion-declarator [opt]
11285 static cp_declarator *
11286 cp_parser_conversion_declarator_opt (cp_parser* parser)
11288 enum tree_code code;
11290 cp_cv_quals cv_quals;
11292 /* We don't know if there's a ptr-operator next, or not. */
11293 cp_parser_parse_tentatively (parser);
11294 /* Try the ptr-operator. */
11295 code = cp_parser_ptr_operator (parser, &class_type, &cv_quals);
11296 /* If it worked, look for more conversion-declarators. */
11297 if (cp_parser_parse_definitely (parser))
11299 cp_declarator *declarator;
11301 /* Parse another optional declarator. */
11302 declarator = cp_parser_conversion_declarator_opt (parser);
11304 return cp_parser_make_indirect_declarator
11305 (code, class_type, cv_quals, declarator);
11311 /* Parse an (optional) ctor-initializer.
11314 : mem-initializer-list
11316 Returns TRUE iff the ctor-initializer was actually present. */
11319 cp_parser_ctor_initializer_opt (cp_parser* parser)
11321 /* If the next token is not a `:', then there is no
11322 ctor-initializer. */
11323 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COLON))
11325 /* Do default initialization of any bases and members. */
11326 if (DECL_CONSTRUCTOR_P (current_function_decl))
11327 finish_mem_initializers (NULL_TREE);
11332 /* Consume the `:' token. */
11333 cp_lexer_consume_token (parser->lexer);
11334 /* And the mem-initializer-list. */
11335 cp_parser_mem_initializer_list (parser);
11340 /* Parse a mem-initializer-list.
11342 mem-initializer-list:
11343 mem-initializer ... [opt]
11344 mem-initializer ... [opt] , mem-initializer-list */
11347 cp_parser_mem_initializer_list (cp_parser* parser)
11349 tree mem_initializer_list = NULL_TREE;
11350 tree target_ctor = error_mark_node;
11351 cp_token *token = cp_lexer_peek_token (parser->lexer);
11353 /* Let the semantic analysis code know that we are starting the
11354 mem-initializer-list. */
11355 if (!DECL_CONSTRUCTOR_P (current_function_decl))
11356 error_at (token->location,
11357 "only constructors take member initializers");
11359 /* Loop through the list. */
11362 tree mem_initializer;
11364 token = cp_lexer_peek_token (parser->lexer);
11365 /* Parse the mem-initializer. */
11366 mem_initializer = cp_parser_mem_initializer (parser);
11367 /* If the next token is a `...', we're expanding member initializers. */
11368 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
11370 /* Consume the `...'. */
11371 cp_lexer_consume_token (parser->lexer);
11373 /* The TREE_PURPOSE must be a _TYPE, because base-specifiers
11374 can be expanded but members cannot. */
11375 if (mem_initializer != error_mark_node
11376 && !TYPE_P (TREE_PURPOSE (mem_initializer)))
11378 error_at (token->location,
11379 "cannot expand initializer for member %<%D%>",
11380 TREE_PURPOSE (mem_initializer));
11381 mem_initializer = error_mark_node;
11384 /* Construct the pack expansion type. */
11385 if (mem_initializer != error_mark_node)
11386 mem_initializer = make_pack_expansion (mem_initializer);
11388 if (target_ctor != error_mark_node
11389 && mem_initializer != error_mark_node)
11391 error ("mem-initializer for %qD follows constructor delegation",
11392 TREE_PURPOSE (mem_initializer));
11393 mem_initializer = error_mark_node;
11395 /* Look for a target constructor. */
11396 if (mem_initializer != error_mark_node
11397 && TYPE_P (TREE_PURPOSE (mem_initializer))
11398 && same_type_p (TREE_PURPOSE (mem_initializer), current_class_type))
11400 maybe_warn_cpp0x (CPP0X_DELEGATING_CTORS);
11401 if (mem_initializer_list)
11403 error ("constructor delegation follows mem-initializer for %qD",
11404 TREE_PURPOSE (mem_initializer_list));
11405 mem_initializer = error_mark_node;
11407 target_ctor = mem_initializer;
11409 /* Add it to the list, unless it was erroneous. */
11410 if (mem_initializer != error_mark_node)
11412 TREE_CHAIN (mem_initializer) = mem_initializer_list;
11413 mem_initializer_list = mem_initializer;
11415 /* If the next token is not a `,', we're done. */
11416 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
11418 /* Consume the `,' token. */
11419 cp_lexer_consume_token (parser->lexer);
11422 /* Perform semantic analysis. */
11423 if (DECL_CONSTRUCTOR_P (current_function_decl))
11424 finish_mem_initializers (mem_initializer_list);
11427 /* Parse a mem-initializer.
11430 mem-initializer-id ( expression-list [opt] )
11431 mem-initializer-id braced-init-list
11436 ( expression-list [opt] )
11438 Returns a TREE_LIST. The TREE_PURPOSE is the TYPE (for a base
11439 class) or FIELD_DECL (for a non-static data member) to initialize;
11440 the TREE_VALUE is the expression-list. An empty initialization
11441 list is represented by void_list_node. */
11444 cp_parser_mem_initializer (cp_parser* parser)
11446 tree mem_initializer_id;
11447 tree expression_list;
11449 cp_token *token = cp_lexer_peek_token (parser->lexer);
11451 /* Find out what is being initialized. */
11452 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
11454 permerror (token->location,
11455 "anachronistic old-style base class initializer");
11456 mem_initializer_id = NULL_TREE;
11460 mem_initializer_id = cp_parser_mem_initializer_id (parser);
11461 if (mem_initializer_id == error_mark_node)
11462 return mem_initializer_id;
11464 member = expand_member_init (mem_initializer_id);
11465 if (member && !DECL_P (member))
11466 in_base_initializer = 1;
11468 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
11470 bool expr_non_constant_p;
11471 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
11472 expression_list = cp_parser_braced_list (parser, &expr_non_constant_p);
11473 CONSTRUCTOR_IS_DIRECT_INIT (expression_list) = 1;
11474 expression_list = build_tree_list (NULL_TREE, expression_list);
11479 vec = cp_parser_parenthesized_expression_list (parser, non_attr,
11481 /*allow_expansion_p=*/true,
11482 /*non_constant_p=*/NULL);
11484 return error_mark_node;
11485 expression_list = build_tree_list_vec (vec);
11486 release_tree_vector (vec);
11489 if (expression_list == error_mark_node)
11490 return error_mark_node;
11491 if (!expression_list)
11492 expression_list = void_type_node;
11494 in_base_initializer = 0;
11496 return member ? build_tree_list (member, expression_list) : error_mark_node;
11499 /* Parse a mem-initializer-id.
11501 mem-initializer-id:
11502 :: [opt] nested-name-specifier [opt] class-name
11505 Returns a TYPE indicating the class to be initializer for the first
11506 production. Returns an IDENTIFIER_NODE indicating the data member
11507 to be initialized for the second production. */
11510 cp_parser_mem_initializer_id (cp_parser* parser)
11512 bool global_scope_p;
11513 bool nested_name_specifier_p;
11514 bool template_p = false;
11517 cp_token *token = cp_lexer_peek_token (parser->lexer);
11519 /* `typename' is not allowed in this context ([temp.res]). */
11520 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TYPENAME))
11522 error_at (token->location,
11523 "keyword %<typename%> not allowed in this context (a qualified "
11524 "member initializer is implicitly a type)");
11525 cp_lexer_consume_token (parser->lexer);
11527 /* Look for the optional `::' operator. */
11529 = (cp_parser_global_scope_opt (parser,
11530 /*current_scope_valid_p=*/false)
11532 /* Look for the optional nested-name-specifier. The simplest way to
11537 The keyword `typename' is not permitted in a base-specifier or
11538 mem-initializer; in these contexts a qualified name that
11539 depends on a template-parameter is implicitly assumed to be a
11542 is to assume that we have seen the `typename' keyword at this
11544 nested_name_specifier_p
11545 = (cp_parser_nested_name_specifier_opt (parser,
11546 /*typename_keyword_p=*/true,
11547 /*check_dependency_p=*/true,
11549 /*is_declaration=*/true)
11551 if (nested_name_specifier_p)
11552 template_p = cp_parser_optional_template_keyword (parser);
11553 /* If there is a `::' operator or a nested-name-specifier, then we
11554 are definitely looking for a class-name. */
11555 if (global_scope_p || nested_name_specifier_p)
11556 return cp_parser_class_name (parser,
11557 /*typename_keyword_p=*/true,
11558 /*template_keyword_p=*/template_p,
11560 /*check_dependency_p=*/true,
11561 /*class_head_p=*/false,
11562 /*is_declaration=*/true);
11563 /* Otherwise, we could also be looking for an ordinary identifier. */
11564 cp_parser_parse_tentatively (parser);
11565 /* Try a class-name. */
11566 id = cp_parser_class_name (parser,
11567 /*typename_keyword_p=*/true,
11568 /*template_keyword_p=*/false,
11570 /*check_dependency_p=*/true,
11571 /*class_head_p=*/false,
11572 /*is_declaration=*/true);
11573 /* If we found one, we're done. */
11574 if (cp_parser_parse_definitely (parser))
11576 /* Otherwise, look for an ordinary identifier. */
11577 return cp_parser_identifier (parser);
11580 /* Overloading [gram.over] */
11582 /* Parse an operator-function-id.
11584 operator-function-id:
11587 Returns an IDENTIFIER_NODE for the operator which is a
11588 human-readable spelling of the identifier, e.g., `operator +'. */
11591 cp_parser_operator_function_id (cp_parser* parser)
11593 /* Look for the `operator' keyword. */
11594 if (!cp_parser_require_keyword (parser, RID_OPERATOR, RT_OPERATOR))
11595 return error_mark_node;
11596 /* And then the name of the operator itself. */
11597 return cp_parser_operator (parser);
11600 /* Return an identifier node for a user-defined literal operator.
11601 The suffix identifier is chained to the operator name identifier. */
11604 cp_literal_operator_id (const char* name)
11607 char *buffer = XNEWVEC (char, strlen (UDLIT_OP_ANSI_PREFIX)
11608 + strlen (name) + 10);
11609 sprintf (buffer, UDLIT_OP_ANSI_FORMAT, name);
11610 identifier = get_identifier (buffer);
11611 /*IDENTIFIER_UDLIT_OPNAME_P (identifier) = 1; If we get a flag someday. */
11616 /* Parse an operator.
11619 new delete new[] delete[] + - * / % ^ & | ~ ! = < >
11620 += -= *= /= %= ^= &= |= << >> >>= <<= == != <= >= &&
11621 || ++ -- , ->* -> () []
11628 Returns an IDENTIFIER_NODE for the operator which is a
11629 human-readable spelling of the identifier, e.g., `operator +'. */
11632 cp_parser_operator (cp_parser* parser)
11634 tree id = NULL_TREE;
11637 /* Peek at the next token. */
11638 token = cp_lexer_peek_token (parser->lexer);
11639 /* Figure out which operator we have. */
11640 switch (token->type)
11646 /* The keyword should be either `new' or `delete'. */
11647 if (token->keyword == RID_NEW)
11649 else if (token->keyword == RID_DELETE)
11654 /* Consume the `new' or `delete' token. */
11655 cp_lexer_consume_token (parser->lexer);
11657 /* Peek at the next token. */
11658 token = cp_lexer_peek_token (parser->lexer);
11659 /* If it's a `[' token then this is the array variant of the
11661 if (token->type == CPP_OPEN_SQUARE)
11663 /* Consume the `[' token. */
11664 cp_lexer_consume_token (parser->lexer);
11665 /* Look for the `]' token. */
11666 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
11667 id = ansi_opname (op == NEW_EXPR
11668 ? VEC_NEW_EXPR : VEC_DELETE_EXPR);
11670 /* Otherwise, we have the non-array variant. */
11672 id = ansi_opname (op);
11678 id = ansi_opname (PLUS_EXPR);
11682 id = ansi_opname (MINUS_EXPR);
11686 id = ansi_opname (MULT_EXPR);
11690 id = ansi_opname (TRUNC_DIV_EXPR);
11694 id = ansi_opname (TRUNC_MOD_EXPR);
11698 id = ansi_opname (BIT_XOR_EXPR);
11702 id = ansi_opname (BIT_AND_EXPR);
11706 id = ansi_opname (BIT_IOR_EXPR);
11710 id = ansi_opname (BIT_NOT_EXPR);
11714 id = ansi_opname (TRUTH_NOT_EXPR);
11718 id = ansi_assopname (NOP_EXPR);
11722 id = ansi_opname (LT_EXPR);
11726 id = ansi_opname (GT_EXPR);
11730 id = ansi_assopname (PLUS_EXPR);
11734 id = ansi_assopname (MINUS_EXPR);
11738 id = ansi_assopname (MULT_EXPR);
11742 id = ansi_assopname (TRUNC_DIV_EXPR);
11746 id = ansi_assopname (TRUNC_MOD_EXPR);
11750 id = ansi_assopname (BIT_XOR_EXPR);
11754 id = ansi_assopname (BIT_AND_EXPR);
11758 id = ansi_assopname (BIT_IOR_EXPR);
11762 id = ansi_opname (LSHIFT_EXPR);
11766 id = ansi_opname (RSHIFT_EXPR);
11769 case CPP_LSHIFT_EQ:
11770 id = ansi_assopname (LSHIFT_EXPR);
11773 case CPP_RSHIFT_EQ:
11774 id = ansi_assopname (RSHIFT_EXPR);
11778 id = ansi_opname (EQ_EXPR);
11782 id = ansi_opname (NE_EXPR);
11786 id = ansi_opname (LE_EXPR);
11789 case CPP_GREATER_EQ:
11790 id = ansi_opname (GE_EXPR);
11794 id = ansi_opname (TRUTH_ANDIF_EXPR);
11798 id = ansi_opname (TRUTH_ORIF_EXPR);
11801 case CPP_PLUS_PLUS:
11802 id = ansi_opname (POSTINCREMENT_EXPR);
11805 case CPP_MINUS_MINUS:
11806 id = ansi_opname (PREDECREMENT_EXPR);
11810 id = ansi_opname (COMPOUND_EXPR);
11813 case CPP_DEREF_STAR:
11814 id = ansi_opname (MEMBER_REF);
11818 id = ansi_opname (COMPONENT_REF);
11821 case CPP_OPEN_PAREN:
11822 /* Consume the `('. */
11823 cp_lexer_consume_token (parser->lexer);
11824 /* Look for the matching `)'. */
11825 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
11826 return ansi_opname (CALL_EXPR);
11828 case CPP_OPEN_SQUARE:
11829 /* Consume the `['. */
11830 cp_lexer_consume_token (parser->lexer);
11831 /* Look for the matching `]'. */
11832 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
11833 return ansi_opname (ARRAY_REF);
11836 if (cxx_dialect == cxx98)
11837 maybe_warn_cpp0x (CPP0X_USER_DEFINED_LITERALS);
11838 if (TREE_STRING_LENGTH (token->u.value) > 2)
11840 error ("expected empty string after %<operator%> keyword");
11841 return error_mark_node;
11843 /* Consume the string. */
11844 cp_lexer_consume_token (parser->lexer);
11845 /* Look for the suffix identifier. */
11846 token = cp_lexer_peek_token (parser->lexer);
11847 if (token->type == CPP_NAME)
11849 id = cp_parser_identifier (parser);
11850 if (id != error_mark_node)
11852 const char *name = IDENTIFIER_POINTER (id);
11853 return cp_literal_operator_id (name);
11858 error ("expected suffix identifier");
11859 return error_mark_node;
11862 case CPP_STRING_USERDEF:
11863 error ("missing space between %<\"\"%> and suffix identifier");
11864 return error_mark_node;
11867 /* Anything else is an error. */
11871 /* If we have selected an identifier, we need to consume the
11874 cp_lexer_consume_token (parser->lexer);
11875 /* Otherwise, no valid operator name was present. */
11878 cp_parser_error (parser, "expected operator");
11879 id = error_mark_node;
11885 /* Parse a template-declaration.
11887 template-declaration:
11888 export [opt] template < template-parameter-list > declaration
11890 If MEMBER_P is TRUE, this template-declaration occurs within a
11893 The grammar rule given by the standard isn't correct. What
11894 is really meant is:
11896 template-declaration:
11897 export [opt] template-parameter-list-seq
11898 decl-specifier-seq [opt] init-declarator [opt] ;
11899 export [opt] template-parameter-list-seq
11900 function-definition
11902 template-parameter-list-seq:
11903 template-parameter-list-seq [opt]
11904 template < template-parameter-list > */
11907 cp_parser_template_declaration (cp_parser* parser, bool member_p)
11909 /* Check for `export'. */
11910 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_EXPORT))
11912 /* Consume the `export' token. */
11913 cp_lexer_consume_token (parser->lexer);
11914 /* Warn that we do not support `export'. */
11915 warning (0, "keyword %<export%> not implemented, and will be ignored");
11918 cp_parser_template_declaration_after_export (parser, member_p);
11921 /* Parse a template-parameter-list.
11923 template-parameter-list:
11925 template-parameter-list , template-parameter
11927 Returns a TREE_LIST. Each node represents a template parameter.
11928 The nodes are connected via their TREE_CHAINs. */
11931 cp_parser_template_parameter_list (cp_parser* parser)
11933 tree parameter_list = NULL_TREE;
11935 begin_template_parm_list ();
11937 /* The loop below parses the template parms. We first need to know
11938 the total number of template parms to be able to compute proper
11939 canonical types of each dependent type. So after the loop, when
11940 we know the total number of template parms,
11941 end_template_parm_list computes the proper canonical types and
11942 fixes up the dependent types accordingly. */
11947 bool is_parameter_pack;
11948 location_t parm_loc;
11950 /* Parse the template-parameter. */
11951 parm_loc = cp_lexer_peek_token (parser->lexer)->location;
11952 parameter = cp_parser_template_parameter (parser,
11954 &is_parameter_pack);
11955 /* Add it to the list. */
11956 if (parameter != error_mark_node)
11957 parameter_list = process_template_parm (parameter_list,
11965 tree err_parm = build_tree_list (parameter, parameter);
11966 parameter_list = chainon (parameter_list, err_parm);
11969 /* If the next token is not a `,', we're done. */
11970 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
11972 /* Otherwise, consume the `,' token. */
11973 cp_lexer_consume_token (parser->lexer);
11976 return end_template_parm_list (parameter_list);
11979 /* Parse a template-parameter.
11981 template-parameter:
11983 parameter-declaration
11985 If all goes well, returns a TREE_LIST. The TREE_VALUE represents
11986 the parameter. The TREE_PURPOSE is the default value, if any.
11987 Returns ERROR_MARK_NODE on failure. *IS_NON_TYPE is set to true
11988 iff this parameter is a non-type parameter. *IS_PARAMETER_PACK is
11989 set to true iff this parameter is a parameter pack. */
11992 cp_parser_template_parameter (cp_parser* parser, bool *is_non_type,
11993 bool *is_parameter_pack)
11996 cp_parameter_declarator *parameter_declarator;
11997 cp_declarator *id_declarator;
12000 /* Assume it is a type parameter or a template parameter. */
12001 *is_non_type = false;
12002 /* Assume it not a parameter pack. */
12003 *is_parameter_pack = false;
12004 /* Peek at the next token. */
12005 token = cp_lexer_peek_token (parser->lexer);
12006 /* If it is `class' or `template', we have a type-parameter. */
12007 if (token->keyword == RID_TEMPLATE)
12008 return cp_parser_type_parameter (parser, is_parameter_pack);
12009 /* If it is `class' or `typename' we do not know yet whether it is a
12010 type parameter or a non-type parameter. Consider:
12012 template <typename T, typename T::X X> ...
12016 template <class C, class D*> ...
12018 Here, the first parameter is a type parameter, and the second is
12019 a non-type parameter. We can tell by looking at the token after
12020 the identifier -- if it is a `,', `=', or `>' then we have a type
12022 if (token->keyword == RID_TYPENAME || token->keyword == RID_CLASS)
12024 /* Peek at the token after `class' or `typename'. */
12025 token = cp_lexer_peek_nth_token (parser->lexer, 2);
12026 /* If it's an ellipsis, we have a template type parameter
12028 if (token->type == CPP_ELLIPSIS)
12029 return cp_parser_type_parameter (parser, is_parameter_pack);
12030 /* If it's an identifier, skip it. */
12031 if (token->type == CPP_NAME)
12032 token = cp_lexer_peek_nth_token (parser->lexer, 3);
12033 /* Now, see if the token looks like the end of a template
12035 if (token->type == CPP_COMMA
12036 || token->type == CPP_EQ
12037 || token->type == CPP_GREATER)
12038 return cp_parser_type_parameter (parser, is_parameter_pack);
12041 /* Otherwise, it is a non-type parameter.
12045 When parsing a default template-argument for a non-type
12046 template-parameter, the first non-nested `>' is taken as the end
12047 of the template parameter-list rather than a greater-than
12049 *is_non_type = true;
12050 parameter_declarator
12051 = cp_parser_parameter_declaration (parser, /*template_parm_p=*/true,
12052 /*parenthesized_p=*/NULL);
12054 /* If the parameter declaration is marked as a parameter pack, set
12055 *IS_PARAMETER_PACK to notify the caller. Also, unmark the
12056 declarator's PACK_EXPANSION_P, otherwise we'll get errors from
12058 if (parameter_declarator
12059 && parameter_declarator->declarator
12060 && parameter_declarator->declarator->parameter_pack_p)
12062 *is_parameter_pack = true;
12063 parameter_declarator->declarator->parameter_pack_p = false;
12066 /* If the next token is an ellipsis, and we don't already have it
12067 marked as a parameter pack, then we have a parameter pack (that
12068 has no declarator). */
12069 if (!*is_parameter_pack
12070 && cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS)
12071 && declarator_can_be_parameter_pack (parameter_declarator->declarator))
12073 /* Consume the `...'. */
12074 cp_lexer_consume_token (parser->lexer);
12075 maybe_warn_variadic_templates ();
12077 *is_parameter_pack = true;
12079 /* We might end up with a pack expansion as the type of the non-type
12080 template parameter, in which case this is a non-type template
12082 else if (parameter_declarator
12083 && parameter_declarator->decl_specifiers.type
12084 && PACK_EXPANSION_P (parameter_declarator->decl_specifiers.type))
12086 *is_parameter_pack = true;
12087 parameter_declarator->decl_specifiers.type =
12088 PACK_EXPANSION_PATTERN (parameter_declarator->decl_specifiers.type);
12091 if (*is_parameter_pack && cp_lexer_next_token_is (parser->lexer, CPP_EQ))
12093 /* Parameter packs cannot have default arguments. However, a
12094 user may try to do so, so we'll parse them and give an
12095 appropriate diagnostic here. */
12097 cp_token *start_token = cp_lexer_peek_token (parser->lexer);
12099 /* Find the name of the parameter pack. */
12100 id_declarator = parameter_declarator->declarator;
12101 while (id_declarator && id_declarator->kind != cdk_id)
12102 id_declarator = id_declarator->declarator;
12104 if (id_declarator && id_declarator->kind == cdk_id)
12105 error_at (start_token->location,
12106 "template parameter pack %qD cannot have a default argument",
12107 id_declarator->u.id.unqualified_name);
12109 error_at (start_token->location,
12110 "template parameter pack cannot have a default argument");
12112 /* Parse the default argument, but throw away the result. */
12113 cp_parser_default_argument (parser, /*template_parm_p=*/true);
12116 parm = grokdeclarator (parameter_declarator->declarator,
12117 ¶meter_declarator->decl_specifiers,
12118 TPARM, /*initialized=*/0,
12119 /*attrlist=*/NULL);
12120 if (parm == error_mark_node)
12121 return error_mark_node;
12123 return build_tree_list (parameter_declarator->default_argument, parm);
12126 /* Parse a type-parameter.
12129 class identifier [opt]
12130 class identifier [opt] = type-id
12131 typename identifier [opt]
12132 typename identifier [opt] = type-id
12133 template < template-parameter-list > class identifier [opt]
12134 template < template-parameter-list > class identifier [opt]
12137 GNU Extension (variadic templates):
12140 class ... identifier [opt]
12141 typename ... identifier [opt]
12143 Returns a TREE_LIST. The TREE_VALUE is itself a TREE_LIST. The
12144 TREE_PURPOSE is the default-argument, if any. The TREE_VALUE is
12145 the declaration of the parameter.
12147 Sets *IS_PARAMETER_PACK if this is a template parameter pack. */
12150 cp_parser_type_parameter (cp_parser* parser, bool *is_parameter_pack)
12155 /* Look for a keyword to tell us what kind of parameter this is. */
12156 token = cp_parser_require (parser, CPP_KEYWORD, RT_CLASS_TYPENAME_TEMPLATE);
12158 return error_mark_node;
12160 switch (token->keyword)
12166 tree default_argument;
12168 /* If the next token is an ellipsis, we have a template
12170 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
12172 /* Consume the `...' token. */
12173 cp_lexer_consume_token (parser->lexer);
12174 maybe_warn_variadic_templates ();
12176 *is_parameter_pack = true;
12179 /* If the next token is an identifier, then it names the
12181 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
12182 identifier = cp_parser_identifier (parser);
12184 identifier = NULL_TREE;
12186 /* Create the parameter. */
12187 parameter = finish_template_type_parm (class_type_node, identifier);
12189 /* If the next token is an `=', we have a default argument. */
12190 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
12192 /* Consume the `=' token. */
12193 cp_lexer_consume_token (parser->lexer);
12194 /* Parse the default-argument. */
12195 push_deferring_access_checks (dk_no_deferred);
12196 default_argument = cp_parser_type_id (parser);
12198 /* Template parameter packs cannot have default
12200 if (*is_parameter_pack)
12203 error_at (token->location,
12204 "template parameter pack %qD cannot have a "
12205 "default argument", identifier);
12207 error_at (token->location,
12208 "template parameter packs cannot have "
12209 "default arguments");
12210 default_argument = NULL_TREE;
12212 pop_deferring_access_checks ();
12215 default_argument = NULL_TREE;
12217 /* Create the combined representation of the parameter and the
12218 default argument. */
12219 parameter = build_tree_list (default_argument, parameter);
12226 tree default_argument;
12228 /* Look for the `<'. */
12229 cp_parser_require (parser, CPP_LESS, RT_LESS);
12230 /* Parse the template-parameter-list. */
12231 cp_parser_template_parameter_list (parser);
12232 /* Look for the `>'. */
12233 cp_parser_require (parser, CPP_GREATER, RT_GREATER);
12234 /* Look for the `class' keyword. */
12235 cp_parser_require_keyword (parser, RID_CLASS, RT_CLASS);
12236 /* If the next token is an ellipsis, we have a template
12238 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
12240 /* Consume the `...' token. */
12241 cp_lexer_consume_token (parser->lexer);
12242 maybe_warn_variadic_templates ();
12244 *is_parameter_pack = true;
12246 /* If the next token is an `=', then there is a
12247 default-argument. If the next token is a `>', we are at
12248 the end of the parameter-list. If the next token is a `,',
12249 then we are at the end of this parameter. */
12250 if (cp_lexer_next_token_is_not (parser->lexer, CPP_EQ)
12251 && cp_lexer_next_token_is_not (parser->lexer, CPP_GREATER)
12252 && cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
12254 identifier = cp_parser_identifier (parser);
12255 /* Treat invalid names as if the parameter were nameless. */
12256 if (identifier == error_mark_node)
12257 identifier = NULL_TREE;
12260 identifier = NULL_TREE;
12262 /* Create the template parameter. */
12263 parameter = finish_template_template_parm (class_type_node,
12266 /* If the next token is an `=', then there is a
12267 default-argument. */
12268 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
12272 /* Consume the `='. */
12273 cp_lexer_consume_token (parser->lexer);
12274 /* Parse the id-expression. */
12275 push_deferring_access_checks (dk_no_deferred);
12276 /* save token before parsing the id-expression, for error
12278 token = cp_lexer_peek_token (parser->lexer);
12280 = cp_parser_id_expression (parser,
12281 /*template_keyword_p=*/false,
12282 /*check_dependency_p=*/true,
12283 /*template_p=*/&is_template,
12284 /*declarator_p=*/false,
12285 /*optional_p=*/false);
12286 if (TREE_CODE (default_argument) == TYPE_DECL)
12287 /* If the id-expression was a template-id that refers to
12288 a template-class, we already have the declaration here,
12289 so no further lookup is needed. */
12292 /* Look up the name. */
12294 = cp_parser_lookup_name (parser, default_argument,
12296 /*is_template=*/is_template,
12297 /*is_namespace=*/false,
12298 /*check_dependency=*/true,
12299 /*ambiguous_decls=*/NULL,
12301 /* See if the default argument is valid. */
12303 = check_template_template_default_arg (default_argument);
12305 /* Template parameter packs cannot have default
12307 if (*is_parameter_pack)
12310 error_at (token->location,
12311 "template parameter pack %qD cannot "
12312 "have a default argument",
12315 error_at (token->location, "template parameter packs cannot "
12316 "have default arguments");
12317 default_argument = NULL_TREE;
12319 pop_deferring_access_checks ();
12322 default_argument = NULL_TREE;
12324 /* Create the combined representation of the parameter and the
12325 default argument. */
12326 parameter = build_tree_list (default_argument, parameter);
12331 gcc_unreachable ();
12338 /* Parse a template-id.
12341 template-name < template-argument-list [opt] >
12343 If TEMPLATE_KEYWORD_P is TRUE, then we have just seen the
12344 `template' keyword. In this case, a TEMPLATE_ID_EXPR will be
12345 returned. Otherwise, if the template-name names a function, or set
12346 of functions, returns a TEMPLATE_ID_EXPR. If the template-name
12347 names a class, returns a TYPE_DECL for the specialization.
12349 If CHECK_DEPENDENCY_P is FALSE, names are looked up in
12350 uninstantiated templates. */
12353 cp_parser_template_id (cp_parser *parser,
12354 bool template_keyword_p,
12355 bool check_dependency_p,
12356 bool is_declaration)
12362 cp_token_position start_of_id = 0;
12363 deferred_access_check *chk;
12364 VEC (deferred_access_check,gc) *access_check;
12365 cp_token *next_token = NULL, *next_token_2 = NULL;
12366 bool is_identifier;
12368 /* If the next token corresponds to a template-id, there is no need
12370 next_token = cp_lexer_peek_token (parser->lexer);
12371 if (next_token->type == CPP_TEMPLATE_ID)
12373 struct tree_check *check_value;
12375 /* Get the stored value. */
12376 check_value = cp_lexer_consume_token (parser->lexer)->u.tree_check_value;
12377 /* Perform any access checks that were deferred. */
12378 access_check = check_value->checks;
12381 FOR_EACH_VEC_ELT (deferred_access_check, access_check, i, chk)
12382 perform_or_defer_access_check (chk->binfo,
12386 /* Return the stored value. */
12387 return check_value->value;
12390 /* Avoid performing name lookup if there is no possibility of
12391 finding a template-id. */
12392 if ((next_token->type != CPP_NAME && next_token->keyword != RID_OPERATOR)
12393 || (next_token->type == CPP_NAME
12394 && !cp_parser_nth_token_starts_template_argument_list_p
12397 cp_parser_error (parser, "expected template-id");
12398 return error_mark_node;
12401 /* Remember where the template-id starts. */
12402 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
12403 start_of_id = cp_lexer_token_position (parser->lexer, false);
12405 push_deferring_access_checks (dk_deferred);
12407 /* Parse the template-name. */
12408 is_identifier = false;
12409 templ = cp_parser_template_name (parser, template_keyword_p,
12410 check_dependency_p,
12413 if (templ == error_mark_node || is_identifier)
12415 pop_deferring_access_checks ();
12419 /* If we find the sequence `[:' after a template-name, it's probably
12420 a digraph-typo for `< ::'. Substitute the tokens and check if we can
12421 parse correctly the argument list. */
12422 next_token = cp_lexer_peek_token (parser->lexer);
12423 next_token_2 = cp_lexer_peek_nth_token (parser->lexer, 2);
12424 if (next_token->type == CPP_OPEN_SQUARE
12425 && next_token->flags & DIGRAPH
12426 && next_token_2->type == CPP_COLON
12427 && !(next_token_2->flags & PREV_WHITE))
12429 cp_parser_parse_tentatively (parser);
12430 /* Change `:' into `::'. */
12431 next_token_2->type = CPP_SCOPE;
12432 /* Consume the first token (CPP_OPEN_SQUARE - which we pretend it is
12434 cp_lexer_consume_token (parser->lexer);
12436 /* Parse the arguments. */
12437 arguments = cp_parser_enclosed_template_argument_list (parser);
12438 if (!cp_parser_parse_definitely (parser))
12440 /* If we couldn't parse an argument list, then we revert our changes
12441 and return simply an error. Maybe this is not a template-id
12443 next_token_2->type = CPP_COLON;
12444 cp_parser_error (parser, "expected %<<%>");
12445 pop_deferring_access_checks ();
12446 return error_mark_node;
12448 /* Otherwise, emit an error about the invalid digraph, but continue
12449 parsing because we got our argument list. */
12450 if (permerror (next_token->location,
12451 "%<<::%> cannot begin a template-argument list"))
12453 static bool hint = false;
12454 inform (next_token->location,
12455 "%<<:%> is an alternate spelling for %<[%>."
12456 " Insert whitespace between %<<%> and %<::%>");
12457 if (!hint && !flag_permissive)
12459 inform (next_token->location, "(if you use %<-fpermissive%>"
12460 " G++ will accept your code)");
12467 /* Look for the `<' that starts the template-argument-list. */
12468 if (!cp_parser_require (parser, CPP_LESS, RT_LESS))
12470 pop_deferring_access_checks ();
12471 return error_mark_node;
12473 /* Parse the arguments. */
12474 arguments = cp_parser_enclosed_template_argument_list (parser);
12477 /* Build a representation of the specialization. */
12478 if (TREE_CODE (templ) == IDENTIFIER_NODE)
12479 template_id = build_min_nt (TEMPLATE_ID_EXPR, templ, arguments);
12480 else if (DECL_TYPE_TEMPLATE_P (templ)
12481 || DECL_TEMPLATE_TEMPLATE_PARM_P (templ))
12483 bool entering_scope;
12484 /* In "template <typename T> ... A<T>::", A<T> is the abstract A
12485 template (rather than some instantiation thereof) only if
12486 is not nested within some other construct. For example, in
12487 "template <typename T> void f(T) { A<T>::", A<T> is just an
12488 instantiation of A. */
12489 entering_scope = (template_parm_scope_p ()
12490 && cp_lexer_next_token_is (parser->lexer,
12493 = finish_template_type (templ, arguments, entering_scope);
12497 /* If it's not a class-template or a template-template, it should be
12498 a function-template. */
12499 gcc_assert ((DECL_FUNCTION_TEMPLATE_P (templ)
12500 || TREE_CODE (templ) == OVERLOAD
12501 || BASELINK_P (templ)));
12503 template_id = lookup_template_function (templ, arguments);
12506 /* If parsing tentatively, replace the sequence of tokens that makes
12507 up the template-id with a CPP_TEMPLATE_ID token. That way,
12508 should we re-parse the token stream, we will not have to repeat
12509 the effort required to do the parse, nor will we issue duplicate
12510 error messages about problems during instantiation of the
12514 cp_token *token = cp_lexer_token_at (parser->lexer, start_of_id);
12516 /* Reset the contents of the START_OF_ID token. */
12517 token->type = CPP_TEMPLATE_ID;
12518 /* Retrieve any deferred checks. Do not pop this access checks yet
12519 so the memory will not be reclaimed during token replacing below. */
12520 token->u.tree_check_value = ggc_alloc_cleared_tree_check ();
12521 token->u.tree_check_value->value = template_id;
12522 token->u.tree_check_value->checks = get_deferred_access_checks ();
12523 token->keyword = RID_MAX;
12525 /* Purge all subsequent tokens. */
12526 cp_lexer_purge_tokens_after (parser->lexer, start_of_id);
12528 /* ??? Can we actually assume that, if template_id ==
12529 error_mark_node, we will have issued a diagnostic to the
12530 user, as opposed to simply marking the tentative parse as
12532 if (cp_parser_error_occurred (parser) && template_id != error_mark_node)
12533 error_at (token->location, "parse error in template argument list");
12536 pop_deferring_access_checks ();
12537 return template_id;
12540 /* Parse a template-name.
12545 The standard should actually say:
12549 operator-function-id
12551 A defect report has been filed about this issue.
12553 A conversion-function-id cannot be a template name because they cannot
12554 be part of a template-id. In fact, looking at this code:
12556 a.operator K<int>()
12558 the conversion-function-id is "operator K<int>", and K<int> is a type-id.
12559 It is impossible to call a templated conversion-function-id with an
12560 explicit argument list, since the only allowed template parameter is
12561 the type to which it is converting.
12563 If TEMPLATE_KEYWORD_P is true, then we have just seen the
12564 `template' keyword, in a construction like:
12568 In that case `f' is taken to be a template-name, even though there
12569 is no way of knowing for sure.
12571 Returns the TEMPLATE_DECL for the template, or an OVERLOAD if the
12572 name refers to a set of overloaded functions, at least one of which
12573 is a template, or an IDENTIFIER_NODE with the name of the template,
12574 if TEMPLATE_KEYWORD_P is true. If CHECK_DEPENDENCY_P is FALSE,
12575 names are looked up inside uninstantiated templates. */
12578 cp_parser_template_name (cp_parser* parser,
12579 bool template_keyword_p,
12580 bool check_dependency_p,
12581 bool is_declaration,
12582 bool *is_identifier)
12587 cp_token *token = cp_lexer_peek_token (parser->lexer);
12589 /* If the next token is `operator', then we have either an
12590 operator-function-id or a conversion-function-id. */
12591 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_OPERATOR))
12593 /* We don't know whether we're looking at an
12594 operator-function-id or a conversion-function-id. */
12595 cp_parser_parse_tentatively (parser);
12596 /* Try an operator-function-id. */
12597 identifier = cp_parser_operator_function_id (parser);
12598 /* If that didn't work, try a conversion-function-id. */
12599 if (!cp_parser_parse_definitely (parser))
12601 cp_parser_error (parser, "expected template-name");
12602 return error_mark_node;
12605 /* Look for the identifier. */
12607 identifier = cp_parser_identifier (parser);
12609 /* If we didn't find an identifier, we don't have a template-id. */
12610 if (identifier == error_mark_node)
12611 return error_mark_node;
12613 /* If the name immediately followed the `template' keyword, then it
12614 is a template-name. However, if the next token is not `<', then
12615 we do not treat it as a template-name, since it is not being used
12616 as part of a template-id. This enables us to handle constructs
12619 template <typename T> struct S { S(); };
12620 template <typename T> S<T>::S();
12622 correctly. We would treat `S' as a template -- if it were `S<T>'
12623 -- but we do not if there is no `<'. */
12625 if (processing_template_decl
12626 && cp_parser_nth_token_starts_template_argument_list_p (parser, 1))
12628 /* In a declaration, in a dependent context, we pretend that the
12629 "template" keyword was present in order to improve error
12630 recovery. For example, given:
12632 template <typename T> void f(T::X<int>);
12634 we want to treat "X<int>" as a template-id. */
12636 && !template_keyword_p
12637 && parser->scope && TYPE_P (parser->scope)
12638 && check_dependency_p
12639 && dependent_scope_p (parser->scope)
12640 /* Do not do this for dtors (or ctors), since they never
12641 need the template keyword before their name. */
12642 && !constructor_name_p (identifier, parser->scope))
12644 cp_token_position start = 0;
12646 /* Explain what went wrong. */
12647 error_at (token->location, "non-template %qD used as template",
12649 inform (token->location, "use %<%T::template %D%> to indicate that it is a template",
12650 parser->scope, identifier);
12651 /* If parsing tentatively, find the location of the "<" token. */
12652 if (cp_parser_simulate_error (parser))
12653 start = cp_lexer_token_position (parser->lexer, true);
12654 /* Parse the template arguments so that we can issue error
12655 messages about them. */
12656 cp_lexer_consume_token (parser->lexer);
12657 cp_parser_enclosed_template_argument_list (parser);
12658 /* Skip tokens until we find a good place from which to
12659 continue parsing. */
12660 cp_parser_skip_to_closing_parenthesis (parser,
12661 /*recovering=*/true,
12663 /*consume_paren=*/false);
12664 /* If parsing tentatively, permanently remove the
12665 template argument list. That will prevent duplicate
12666 error messages from being issued about the missing
12667 "template" keyword. */
12669 cp_lexer_purge_tokens_after (parser->lexer, start);
12671 *is_identifier = true;
12675 /* If the "template" keyword is present, then there is generally
12676 no point in doing name-lookup, so we just return IDENTIFIER.
12677 But, if the qualifying scope is non-dependent then we can
12678 (and must) do name-lookup normally. */
12679 if (template_keyword_p
12681 || (TYPE_P (parser->scope)
12682 && dependent_type_p (parser->scope))))
12686 /* Look up the name. */
12687 decl = cp_parser_lookup_name (parser, identifier,
12689 /*is_template=*/true,
12690 /*is_namespace=*/false,
12691 check_dependency_p,
12692 /*ambiguous_decls=*/NULL,
12695 /* If DECL is a template, then the name was a template-name. */
12696 if (TREE_CODE (decl) == TEMPLATE_DECL)
12700 tree fn = NULL_TREE;
12702 /* The standard does not explicitly indicate whether a name that
12703 names a set of overloaded declarations, some of which are
12704 templates, is a template-name. However, such a name should
12705 be a template-name; otherwise, there is no way to form a
12706 template-id for the overloaded templates. */
12707 fns = BASELINK_P (decl) ? BASELINK_FUNCTIONS (decl) : decl;
12708 if (TREE_CODE (fns) == OVERLOAD)
12709 for (fn = fns; fn; fn = OVL_NEXT (fn))
12710 if (TREE_CODE (OVL_CURRENT (fn)) == TEMPLATE_DECL)
12715 /* The name does not name a template. */
12716 cp_parser_error (parser, "expected template-name");
12717 return error_mark_node;
12721 /* If DECL is dependent, and refers to a function, then just return
12722 its name; we will look it up again during template instantiation. */
12723 if (DECL_FUNCTION_TEMPLATE_P (decl) || !DECL_P (decl))
12725 tree scope = CP_DECL_CONTEXT (get_first_fn (decl));
12726 if (TYPE_P (scope) && dependent_type_p (scope))
12733 /* Parse a template-argument-list.
12735 template-argument-list:
12736 template-argument ... [opt]
12737 template-argument-list , template-argument ... [opt]
12739 Returns a TREE_VEC containing the arguments. */
12742 cp_parser_template_argument_list (cp_parser* parser)
12744 tree fixed_args[10];
12745 unsigned n_args = 0;
12746 unsigned alloced = 10;
12747 tree *arg_ary = fixed_args;
12749 bool saved_in_template_argument_list_p;
12751 bool saved_non_ice_p;
12753 saved_in_template_argument_list_p = parser->in_template_argument_list_p;
12754 parser->in_template_argument_list_p = true;
12755 /* Even if the template-id appears in an integral
12756 constant-expression, the contents of the argument list do
12758 saved_ice_p = parser->integral_constant_expression_p;
12759 parser->integral_constant_expression_p = false;
12760 saved_non_ice_p = parser->non_integral_constant_expression_p;
12761 parser->non_integral_constant_expression_p = false;
12763 /* Parse the arguments. */
12769 /* Consume the comma. */
12770 cp_lexer_consume_token (parser->lexer);
12772 /* Parse the template-argument. */
12773 argument = cp_parser_template_argument (parser);
12775 /* If the next token is an ellipsis, we're expanding a template
12777 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
12779 if (argument == error_mark_node)
12781 cp_token *token = cp_lexer_peek_token (parser->lexer);
12782 error_at (token->location,
12783 "expected parameter pack before %<...%>");
12785 /* Consume the `...' token. */
12786 cp_lexer_consume_token (parser->lexer);
12788 /* Make the argument into a TYPE_PACK_EXPANSION or
12789 EXPR_PACK_EXPANSION. */
12790 argument = make_pack_expansion (argument);
12793 if (n_args == alloced)
12797 if (arg_ary == fixed_args)
12799 arg_ary = XNEWVEC (tree, alloced);
12800 memcpy (arg_ary, fixed_args, sizeof (tree) * n_args);
12803 arg_ary = XRESIZEVEC (tree, arg_ary, alloced);
12805 arg_ary[n_args++] = argument;
12807 while (cp_lexer_next_token_is (parser->lexer, CPP_COMMA));
12809 vec = make_tree_vec (n_args);
12812 TREE_VEC_ELT (vec, n_args) = arg_ary[n_args];
12814 if (arg_ary != fixed_args)
12816 parser->non_integral_constant_expression_p = saved_non_ice_p;
12817 parser->integral_constant_expression_p = saved_ice_p;
12818 parser->in_template_argument_list_p = saved_in_template_argument_list_p;
12819 #ifdef ENABLE_CHECKING
12820 SET_NON_DEFAULT_TEMPLATE_ARGS_COUNT (vec, TREE_VEC_LENGTH (vec));
12825 /* Parse a template-argument.
12828 assignment-expression
12832 The representation is that of an assignment-expression, type-id, or
12833 id-expression -- except that the qualified id-expression is
12834 evaluated, so that the value returned is either a DECL or an
12837 Although the standard says "assignment-expression", it forbids
12838 throw-expressions or assignments in the template argument.
12839 Therefore, we use "conditional-expression" instead. */
12842 cp_parser_template_argument (cp_parser* parser)
12847 bool maybe_type_id = false;
12848 cp_token *token = NULL, *argument_start_token = NULL;
12851 /* There's really no way to know what we're looking at, so we just
12852 try each alternative in order.
12856 In a template-argument, an ambiguity between a type-id and an
12857 expression is resolved to a type-id, regardless of the form of
12858 the corresponding template-parameter.
12860 Therefore, we try a type-id first. */
12861 cp_parser_parse_tentatively (parser);
12862 argument = cp_parser_template_type_arg (parser);
12863 /* If there was no error parsing the type-id but the next token is a
12864 '>>', our behavior depends on which dialect of C++ we're
12865 parsing. In C++98, we probably found a typo for '> >'. But there
12866 are type-id which are also valid expressions. For instance:
12868 struct X { int operator >> (int); };
12869 template <int V> struct Foo {};
12872 Here 'X()' is a valid type-id of a function type, but the user just
12873 wanted to write the expression "X() >> 5". Thus, we remember that we
12874 found a valid type-id, but we still try to parse the argument as an
12875 expression to see what happens.
12877 In C++0x, the '>>' will be considered two separate '>'
12879 if (!cp_parser_error_occurred (parser)
12880 && cxx_dialect == cxx98
12881 && cp_lexer_next_token_is (parser->lexer, CPP_RSHIFT))
12883 maybe_type_id = true;
12884 cp_parser_abort_tentative_parse (parser);
12888 /* If the next token isn't a `,' or a `>', then this argument wasn't
12889 really finished. This means that the argument is not a valid
12891 if (!cp_parser_next_token_ends_template_argument_p (parser))
12892 cp_parser_error (parser, "expected template-argument");
12893 /* If that worked, we're done. */
12894 if (cp_parser_parse_definitely (parser))
12897 /* We're still not sure what the argument will be. */
12898 cp_parser_parse_tentatively (parser);
12899 /* Try a template. */
12900 argument_start_token = cp_lexer_peek_token (parser->lexer);
12901 argument = cp_parser_id_expression (parser,
12902 /*template_keyword_p=*/false,
12903 /*check_dependency_p=*/true,
12905 /*declarator_p=*/false,
12906 /*optional_p=*/false);
12907 /* If the next token isn't a `,' or a `>', then this argument wasn't
12908 really finished. */
12909 if (!cp_parser_next_token_ends_template_argument_p (parser))
12910 cp_parser_error (parser, "expected template-argument");
12911 if (!cp_parser_error_occurred (parser))
12913 /* Figure out what is being referred to. If the id-expression
12914 was for a class template specialization, then we will have a
12915 TYPE_DECL at this point. There is no need to do name lookup
12916 at this point in that case. */
12917 if (TREE_CODE (argument) != TYPE_DECL)
12918 argument = cp_parser_lookup_name (parser, argument,
12920 /*is_template=*/template_p,
12921 /*is_namespace=*/false,
12922 /*check_dependency=*/true,
12923 /*ambiguous_decls=*/NULL,
12924 argument_start_token->location);
12925 if (TREE_CODE (argument) != TEMPLATE_DECL
12926 && TREE_CODE (argument) != UNBOUND_CLASS_TEMPLATE)
12927 cp_parser_error (parser, "expected template-name");
12929 if (cp_parser_parse_definitely (parser))
12931 /* It must be a non-type argument. There permitted cases are given
12932 in [temp.arg.nontype]:
12934 -- an integral constant-expression of integral or enumeration
12937 -- the name of a non-type template-parameter; or
12939 -- the name of an object or function with external linkage...
12941 -- the address of an object or function with external linkage...
12943 -- a pointer to member... */
12944 /* Look for a non-type template parameter. */
12945 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
12947 cp_parser_parse_tentatively (parser);
12948 argument = cp_parser_primary_expression (parser,
12949 /*address_p=*/false,
12951 /*template_arg_p=*/true,
12953 if (TREE_CODE (argument) != TEMPLATE_PARM_INDEX
12954 || !cp_parser_next_token_ends_template_argument_p (parser))
12955 cp_parser_simulate_error (parser);
12956 if (cp_parser_parse_definitely (parser))
12960 /* If the next token is "&", the argument must be the address of an
12961 object or function with external linkage. */
12962 address_p = cp_lexer_next_token_is (parser->lexer, CPP_AND);
12964 cp_lexer_consume_token (parser->lexer);
12965 /* See if we might have an id-expression. */
12966 token = cp_lexer_peek_token (parser->lexer);
12967 if (token->type == CPP_NAME
12968 || token->keyword == RID_OPERATOR
12969 || token->type == CPP_SCOPE
12970 || token->type == CPP_TEMPLATE_ID
12971 || token->type == CPP_NESTED_NAME_SPECIFIER)
12973 cp_parser_parse_tentatively (parser);
12974 argument = cp_parser_primary_expression (parser,
12977 /*template_arg_p=*/true,
12979 if (cp_parser_error_occurred (parser)
12980 || !cp_parser_next_token_ends_template_argument_p (parser))
12981 cp_parser_abort_tentative_parse (parser);
12986 if (TREE_CODE (argument) == INDIRECT_REF)
12988 gcc_assert (REFERENCE_REF_P (argument));
12989 argument = TREE_OPERAND (argument, 0);
12992 /* If we're in a template, we represent a qualified-id referring
12993 to a static data member as a SCOPE_REF even if the scope isn't
12994 dependent so that we can check access control later. */
12996 if (TREE_CODE (probe) == SCOPE_REF)
12997 probe = TREE_OPERAND (probe, 1);
12998 if (TREE_CODE (probe) == VAR_DECL)
13000 /* A variable without external linkage might still be a
13001 valid constant-expression, so no error is issued here
13002 if the external-linkage check fails. */
13003 if (!address_p && !DECL_EXTERNAL_LINKAGE_P (probe))
13004 cp_parser_simulate_error (parser);
13006 else if (is_overloaded_fn (argument))
13007 /* All overloaded functions are allowed; if the external
13008 linkage test does not pass, an error will be issued
13012 && (TREE_CODE (argument) == OFFSET_REF
13013 || TREE_CODE (argument) == SCOPE_REF))
13014 /* A pointer-to-member. */
13016 else if (TREE_CODE (argument) == TEMPLATE_PARM_INDEX)
13019 cp_parser_simulate_error (parser);
13021 if (cp_parser_parse_definitely (parser))
13024 argument = build_x_unary_op (ADDR_EXPR, argument,
13025 tf_warning_or_error);
13030 /* If the argument started with "&", there are no other valid
13031 alternatives at this point. */
13034 cp_parser_error (parser, "invalid non-type template argument");
13035 return error_mark_node;
13038 /* If the argument wasn't successfully parsed as a type-id followed
13039 by '>>', the argument can only be a constant expression now.
13040 Otherwise, we try parsing the constant-expression tentatively,
13041 because the argument could really be a type-id. */
13043 cp_parser_parse_tentatively (parser);
13044 argument = cp_parser_constant_expression (parser,
13045 /*allow_non_constant_p=*/false,
13046 /*non_constant_p=*/NULL);
13047 argument = fold_non_dependent_expr (argument);
13048 if (!maybe_type_id)
13050 if (!cp_parser_next_token_ends_template_argument_p (parser))
13051 cp_parser_error (parser, "expected template-argument");
13052 if (cp_parser_parse_definitely (parser))
13054 /* We did our best to parse the argument as a non type-id, but that
13055 was the only alternative that matched (albeit with a '>' after
13056 it). We can assume it's just a typo from the user, and a
13057 diagnostic will then be issued. */
13058 return cp_parser_template_type_arg (parser);
13061 /* Parse an explicit-instantiation.
13063 explicit-instantiation:
13064 template declaration
13066 Although the standard says `declaration', what it really means is:
13068 explicit-instantiation:
13069 template decl-specifier-seq [opt] declarator [opt] ;
13071 Things like `template int S<int>::i = 5, int S<double>::j;' are not
13072 supposed to be allowed. A defect report has been filed about this
13077 explicit-instantiation:
13078 storage-class-specifier template
13079 decl-specifier-seq [opt] declarator [opt] ;
13080 function-specifier template
13081 decl-specifier-seq [opt] declarator [opt] ; */
13084 cp_parser_explicit_instantiation (cp_parser* parser)
13086 int declares_class_or_enum;
13087 cp_decl_specifier_seq decl_specifiers;
13088 tree extension_specifier = NULL_TREE;
13090 timevar_push (TV_TEMPLATE_INST);
13092 /* Look for an (optional) storage-class-specifier or
13093 function-specifier. */
13094 if (cp_parser_allow_gnu_extensions_p (parser))
13096 extension_specifier
13097 = cp_parser_storage_class_specifier_opt (parser);
13098 if (!extension_specifier)
13099 extension_specifier
13100 = cp_parser_function_specifier_opt (parser,
13101 /*decl_specs=*/NULL);
13104 /* Look for the `template' keyword. */
13105 cp_parser_require_keyword (parser, RID_TEMPLATE, RT_TEMPLATE);
13106 /* Let the front end know that we are processing an explicit
13108 begin_explicit_instantiation ();
13109 /* [temp.explicit] says that we are supposed to ignore access
13110 control while processing explicit instantiation directives. */
13111 push_deferring_access_checks (dk_no_check);
13112 /* Parse a decl-specifier-seq. */
13113 cp_parser_decl_specifier_seq (parser,
13114 CP_PARSER_FLAGS_OPTIONAL,
13116 &declares_class_or_enum);
13117 /* If there was exactly one decl-specifier, and it declared a class,
13118 and there's no declarator, then we have an explicit type
13120 if (declares_class_or_enum && cp_parser_declares_only_class_p (parser))
13124 type = check_tag_decl (&decl_specifiers);
13125 /* Turn access control back on for names used during
13126 template instantiation. */
13127 pop_deferring_access_checks ();
13129 do_type_instantiation (type, extension_specifier,
13130 /*complain=*/tf_error);
13134 cp_declarator *declarator;
13137 /* Parse the declarator. */
13139 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
13140 /*ctor_dtor_or_conv_p=*/NULL,
13141 /*parenthesized_p=*/NULL,
13142 /*member_p=*/false);
13143 if (declares_class_or_enum & 2)
13144 cp_parser_check_for_definition_in_return_type (declarator,
13145 decl_specifiers.type,
13146 decl_specifiers.type_location);
13147 if (declarator != cp_error_declarator)
13149 if (decl_specifiers.specs[(int)ds_inline])
13150 permerror (input_location, "explicit instantiation shall not use"
13151 " %<inline%> specifier");
13152 if (decl_specifiers.specs[(int)ds_constexpr])
13153 permerror (input_location, "explicit instantiation shall not use"
13154 " %<constexpr%> specifier");
13156 decl = grokdeclarator (declarator, &decl_specifiers,
13157 NORMAL, 0, &decl_specifiers.attributes);
13158 /* Turn access control back on for names used during
13159 template instantiation. */
13160 pop_deferring_access_checks ();
13161 /* Do the explicit instantiation. */
13162 do_decl_instantiation (decl, extension_specifier);
13166 pop_deferring_access_checks ();
13167 /* Skip the body of the explicit instantiation. */
13168 cp_parser_skip_to_end_of_statement (parser);
13171 /* We're done with the instantiation. */
13172 end_explicit_instantiation ();
13174 cp_parser_consume_semicolon_at_end_of_statement (parser);
13176 timevar_pop (TV_TEMPLATE_INST);
13179 /* Parse an explicit-specialization.
13181 explicit-specialization:
13182 template < > declaration
13184 Although the standard says `declaration', what it really means is:
13186 explicit-specialization:
13187 template <> decl-specifier [opt] init-declarator [opt] ;
13188 template <> function-definition
13189 template <> explicit-specialization
13190 template <> template-declaration */
13193 cp_parser_explicit_specialization (cp_parser* parser)
13195 bool need_lang_pop;
13196 cp_token *token = cp_lexer_peek_token (parser->lexer);
13198 /* Look for the `template' keyword. */
13199 cp_parser_require_keyword (parser, RID_TEMPLATE, RT_TEMPLATE);
13200 /* Look for the `<'. */
13201 cp_parser_require (parser, CPP_LESS, RT_LESS);
13202 /* Look for the `>'. */
13203 cp_parser_require (parser, CPP_GREATER, RT_GREATER);
13204 /* We have processed another parameter list. */
13205 ++parser->num_template_parameter_lists;
13208 A template ... explicit specialization ... shall not have C
13210 if (current_lang_name == lang_name_c)
13212 error_at (token->location, "template specialization with C linkage");
13213 /* Give it C++ linkage to avoid confusing other parts of the
13215 push_lang_context (lang_name_cplusplus);
13216 need_lang_pop = true;
13219 need_lang_pop = false;
13220 /* Let the front end know that we are beginning a specialization. */
13221 if (!begin_specialization ())
13223 end_specialization ();
13227 /* If the next keyword is `template', we need to figure out whether
13228 or not we're looking a template-declaration. */
13229 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
13231 if (cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_LESS
13232 && cp_lexer_peek_nth_token (parser->lexer, 3)->type != CPP_GREATER)
13233 cp_parser_template_declaration_after_export (parser,
13234 /*member_p=*/false);
13236 cp_parser_explicit_specialization (parser);
13239 /* Parse the dependent declaration. */
13240 cp_parser_single_declaration (parser,
13242 /*member_p=*/false,
13243 /*explicit_specialization_p=*/true,
13244 /*friend_p=*/NULL);
13245 /* We're done with the specialization. */
13246 end_specialization ();
13247 /* For the erroneous case of a template with C linkage, we pushed an
13248 implicit C++ linkage scope; exit that scope now. */
13250 pop_lang_context ();
13251 /* We're done with this parameter list. */
13252 --parser->num_template_parameter_lists;
13255 /* Parse a type-specifier.
13258 simple-type-specifier
13261 elaborated-type-specifier
13269 Returns a representation of the type-specifier. For a
13270 class-specifier, enum-specifier, or elaborated-type-specifier, a
13271 TREE_TYPE is returned; otherwise, a TYPE_DECL is returned.
13273 The parser flags FLAGS is used to control type-specifier parsing.
13275 If IS_DECLARATION is TRUE, then this type-specifier is appearing
13276 in a decl-specifier-seq.
13278 If DECLARES_CLASS_OR_ENUM is non-NULL, and the type-specifier is a
13279 class-specifier, enum-specifier, or elaborated-type-specifier, then
13280 *DECLARES_CLASS_OR_ENUM is set to a nonzero value. The value is 1
13281 if a type is declared; 2 if it is defined. Otherwise, it is set to
13284 If IS_CV_QUALIFIER is non-NULL, and the type-specifier is a
13285 cv-qualifier, then IS_CV_QUALIFIER is set to TRUE. Otherwise, it
13286 is set to FALSE. */
13289 cp_parser_type_specifier (cp_parser* parser,
13290 cp_parser_flags flags,
13291 cp_decl_specifier_seq *decl_specs,
13292 bool is_declaration,
13293 int* declares_class_or_enum,
13294 bool* is_cv_qualifier)
13296 tree type_spec = NULL_TREE;
13299 cp_decl_spec ds = ds_last;
13301 /* Assume this type-specifier does not declare a new type. */
13302 if (declares_class_or_enum)
13303 *declares_class_or_enum = 0;
13304 /* And that it does not specify a cv-qualifier. */
13305 if (is_cv_qualifier)
13306 *is_cv_qualifier = false;
13307 /* Peek at the next token. */
13308 token = cp_lexer_peek_token (parser->lexer);
13310 /* If we're looking at a keyword, we can use that to guide the
13311 production we choose. */
13312 keyword = token->keyword;
13316 if ((flags & CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS))
13317 goto elaborated_type_specifier;
13319 /* Look for the enum-specifier. */
13320 type_spec = cp_parser_enum_specifier (parser);
13321 /* If that worked, we're done. */
13324 if (declares_class_or_enum)
13325 *declares_class_or_enum = 2;
13327 cp_parser_set_decl_spec_type (decl_specs,
13330 /*type_definition_p=*/true);
13334 goto elaborated_type_specifier;
13336 /* Any of these indicate either a class-specifier, or an
13337 elaborated-type-specifier. */
13341 if ((flags & CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS))
13342 goto elaborated_type_specifier;
13344 /* Parse tentatively so that we can back up if we don't find a
13345 class-specifier. */
13346 cp_parser_parse_tentatively (parser);
13347 /* Look for the class-specifier. */
13348 type_spec = cp_parser_class_specifier (parser);
13349 invoke_plugin_callbacks (PLUGIN_FINISH_TYPE, type_spec);
13350 /* If that worked, we're done. */
13351 if (cp_parser_parse_definitely (parser))
13353 if (declares_class_or_enum)
13354 *declares_class_or_enum = 2;
13356 cp_parser_set_decl_spec_type (decl_specs,
13359 /*type_definition_p=*/true);
13363 /* Fall through. */
13364 elaborated_type_specifier:
13365 /* We're declaring (not defining) a class or enum. */
13366 if (declares_class_or_enum)
13367 *declares_class_or_enum = 1;
13369 /* Fall through. */
13371 /* Look for an elaborated-type-specifier. */
13373 = (cp_parser_elaborated_type_specifier
13375 decl_specs && decl_specs->specs[(int) ds_friend],
13378 cp_parser_set_decl_spec_type (decl_specs,
13381 /*type_definition_p=*/false);
13386 if (is_cv_qualifier)
13387 *is_cv_qualifier = true;
13392 if (is_cv_qualifier)
13393 *is_cv_qualifier = true;
13398 if (is_cv_qualifier)
13399 *is_cv_qualifier = true;
13403 /* The `__complex__' keyword is a GNU extension. */
13411 /* Handle simple keywords. */
13416 ++decl_specs->specs[(int)ds];
13417 decl_specs->any_specifiers_p = true;
13419 return cp_lexer_consume_token (parser->lexer)->u.value;
13422 /* If we do not already have a type-specifier, assume we are looking
13423 at a simple-type-specifier. */
13424 type_spec = cp_parser_simple_type_specifier (parser,
13428 /* If we didn't find a type-specifier, and a type-specifier was not
13429 optional in this context, issue an error message. */
13430 if (!type_spec && !(flags & CP_PARSER_FLAGS_OPTIONAL))
13432 cp_parser_error (parser, "expected type specifier");
13433 return error_mark_node;
13439 /* Parse a simple-type-specifier.
13441 simple-type-specifier:
13442 :: [opt] nested-name-specifier [opt] type-name
13443 :: [opt] nested-name-specifier template template-id
13458 simple-type-specifier:
13460 decltype ( expression )
13463 __underlying_type ( type-id )
13467 simple-type-specifier:
13469 __typeof__ unary-expression
13470 __typeof__ ( type-id )
13472 Returns the indicated TYPE_DECL. If DECL_SPECS is not NULL, it is
13473 appropriately updated. */
13476 cp_parser_simple_type_specifier (cp_parser* parser,
13477 cp_decl_specifier_seq *decl_specs,
13478 cp_parser_flags flags)
13480 tree type = NULL_TREE;
13483 /* Peek at the next token. */
13484 token = cp_lexer_peek_token (parser->lexer);
13486 /* If we're looking at a keyword, things are easy. */
13487 switch (token->keyword)
13491 decl_specs->explicit_char_p = true;
13492 type = char_type_node;
13495 type = char16_type_node;
13498 type = char32_type_node;
13501 type = wchar_type_node;
13504 type = boolean_type_node;
13508 ++decl_specs->specs[(int) ds_short];
13509 type = short_integer_type_node;
13513 decl_specs->explicit_int_p = true;
13514 type = integer_type_node;
13517 if (!int128_integer_type_node)
13520 decl_specs->explicit_int128_p = true;
13521 type = int128_integer_type_node;
13525 ++decl_specs->specs[(int) ds_long];
13526 type = long_integer_type_node;
13530 ++decl_specs->specs[(int) ds_signed];
13531 type = integer_type_node;
13535 ++decl_specs->specs[(int) ds_unsigned];
13536 type = unsigned_type_node;
13539 type = float_type_node;
13542 type = double_type_node;
13545 type = void_type_node;
13549 maybe_warn_cpp0x (CPP0X_AUTO);
13550 type = make_auto ();
13554 /* Since DR 743, decltype can either be a simple-type-specifier by
13555 itself or begin a nested-name-specifier. Parsing it will replace
13556 it with a CPP_DECLTYPE, so just rewind and let the CPP_DECLTYPE
13557 handling below decide what to do. */
13558 cp_parser_decltype (parser);
13559 cp_lexer_set_token_position (parser->lexer, token);
13563 /* Consume the `typeof' token. */
13564 cp_lexer_consume_token (parser->lexer);
13565 /* Parse the operand to `typeof'. */
13566 type = cp_parser_sizeof_operand (parser, RID_TYPEOF);
13567 /* If it is not already a TYPE, take its type. */
13568 if (!TYPE_P (type))
13569 type = finish_typeof (type);
13572 cp_parser_set_decl_spec_type (decl_specs, type,
13574 /*type_definition_p=*/false);
13578 case RID_UNDERLYING_TYPE:
13579 type = cp_parser_trait_expr (parser, RID_UNDERLYING_TYPE);
13581 cp_parser_set_decl_spec_type (decl_specs, type,
13583 /*type_definition_p=*/false);
13588 case RID_DIRECT_BASES:
13589 type = cp_parser_trait_expr (parser, token->keyword);
13591 cp_parser_set_decl_spec_type (decl_specs, type,
13593 /*type_definition_p=*/false);
13599 /* If token is an already-parsed decltype not followed by ::,
13600 it's a simple-type-specifier. */
13601 if (token->type == CPP_DECLTYPE
13602 && cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_SCOPE)
13604 type = token->u.value;
13606 cp_parser_set_decl_spec_type (decl_specs, type,
13608 /*type_definition_p=*/false);
13609 cp_lexer_consume_token (parser->lexer);
13613 /* If the type-specifier was for a built-in type, we're done. */
13616 /* Record the type. */
13618 && (token->keyword != RID_SIGNED
13619 && token->keyword != RID_UNSIGNED
13620 && token->keyword != RID_SHORT
13621 && token->keyword != RID_LONG))
13622 cp_parser_set_decl_spec_type (decl_specs,
13625 /*type_definition_p=*/false);
13627 decl_specs->any_specifiers_p = true;
13629 /* Consume the token. */
13630 cp_lexer_consume_token (parser->lexer);
13632 /* There is no valid C++ program where a non-template type is
13633 followed by a "<". That usually indicates that the user thought
13634 that the type was a template. */
13635 cp_parser_check_for_invalid_template_id (parser, type, token->location);
13637 return TYPE_NAME (type);
13640 /* The type-specifier must be a user-defined type. */
13641 if (!(flags & CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES))
13646 /* Don't gobble tokens or issue error messages if this is an
13647 optional type-specifier. */
13648 if (flags & CP_PARSER_FLAGS_OPTIONAL)
13649 cp_parser_parse_tentatively (parser);
13651 /* Look for the optional `::' operator. */
13653 = (cp_parser_global_scope_opt (parser,
13654 /*current_scope_valid_p=*/false)
13656 /* Look for the nested-name specifier. */
13658 = (cp_parser_nested_name_specifier_opt (parser,
13659 /*typename_keyword_p=*/false,
13660 /*check_dependency_p=*/true,
13662 /*is_declaration=*/false)
13664 token = cp_lexer_peek_token (parser->lexer);
13665 /* If we have seen a nested-name-specifier, and the next token
13666 is `template', then we are using the template-id production. */
13668 && cp_parser_optional_template_keyword (parser))
13670 /* Look for the template-id. */
13671 type = cp_parser_template_id (parser,
13672 /*template_keyword_p=*/true,
13673 /*check_dependency_p=*/true,
13674 /*is_declaration=*/false);
13675 /* If the template-id did not name a type, we are out of
13677 if (TREE_CODE (type) != TYPE_DECL)
13679 cp_parser_error (parser, "expected template-id for type");
13683 /* Otherwise, look for a type-name. */
13685 type = cp_parser_type_name (parser);
13686 /* Keep track of all name-lookups performed in class scopes. */
13690 && TREE_CODE (type) == TYPE_DECL
13691 && TREE_CODE (DECL_NAME (type)) == IDENTIFIER_NODE)
13692 maybe_note_name_used_in_class (DECL_NAME (type), type);
13693 /* If it didn't work out, we don't have a TYPE. */
13694 if ((flags & CP_PARSER_FLAGS_OPTIONAL)
13695 && !cp_parser_parse_definitely (parser))
13697 if (type && decl_specs)
13698 cp_parser_set_decl_spec_type (decl_specs, type,
13700 /*type_definition_p=*/false);
13703 /* If we didn't get a type-name, issue an error message. */
13704 if (!type && !(flags & CP_PARSER_FLAGS_OPTIONAL))
13706 cp_parser_error (parser, "expected type-name");
13707 return error_mark_node;
13710 if (type && type != error_mark_node)
13712 /* See if TYPE is an Objective-C type, and if so, parse and
13713 accept any protocol references following it. Do this before
13714 the cp_parser_check_for_invalid_template_id() call, because
13715 Objective-C types can be followed by '<...>' which would
13716 enclose protocol names rather than template arguments, and so
13717 everything is fine. */
13718 if (c_dialect_objc () && !parser->scope
13719 && (objc_is_id (type) || objc_is_class_name (type)))
13721 tree protos = cp_parser_objc_protocol_refs_opt (parser);
13722 tree qual_type = objc_get_protocol_qualified_type (type, protos);
13724 /* Clobber the "unqualified" type previously entered into
13725 DECL_SPECS with the new, improved protocol-qualified version. */
13727 decl_specs->type = qual_type;
13732 /* There is no valid C++ program where a non-template type is
13733 followed by a "<". That usually indicates that the user
13734 thought that the type was a template. */
13735 cp_parser_check_for_invalid_template_id (parser, TREE_TYPE (type),
13742 /* Parse a type-name.
13748 simple-template-id [in c++0x]
13756 Returns a TYPE_DECL for the type. */
13759 cp_parser_type_name (cp_parser* parser)
13763 /* We can't know yet whether it is a class-name or not. */
13764 cp_parser_parse_tentatively (parser);
13765 /* Try a class-name. */
13766 type_decl = cp_parser_class_name (parser,
13767 /*typename_keyword_p=*/false,
13768 /*template_keyword_p=*/false,
13770 /*check_dependency_p=*/true,
13771 /*class_head_p=*/false,
13772 /*is_declaration=*/false);
13773 /* If it's not a class-name, keep looking. */
13774 if (!cp_parser_parse_definitely (parser))
13776 if (cxx_dialect < cxx0x)
13777 /* It must be a typedef-name or an enum-name. */
13778 return cp_parser_nonclass_name (parser);
13780 cp_parser_parse_tentatively (parser);
13781 /* It is either a simple-template-id representing an
13782 instantiation of an alias template... */
13783 type_decl = cp_parser_template_id (parser,
13784 /*template_keyword_p=*/false,
13785 /*check_dependency_p=*/false,
13786 /*is_declaration=*/false);
13787 /* Note that this must be an instantiation of an alias template
13788 because [temp.names]/6 says:
13790 A template-id that names an alias template specialization
13793 Whereas [temp.names]/7 says:
13795 A simple-template-id that names a class template
13796 specialization is a class-name. */
13797 if (type_decl != NULL_TREE
13798 && TREE_CODE (type_decl) == TYPE_DECL
13799 && TYPE_DECL_ALIAS_P (type_decl))
13800 gcc_assert (DECL_TEMPLATE_INSTANTIATION (type_decl));
13802 cp_parser_simulate_error (parser);
13804 if (!cp_parser_parse_definitely (parser))
13805 /* ... Or a typedef-name or an enum-name. */
13806 return cp_parser_nonclass_name (parser);
13812 /* Parse a non-class type-name, that is, either an enum-name or a typedef-name.
13820 Returns a TYPE_DECL for the type. */
13823 cp_parser_nonclass_name (cp_parser* parser)
13828 cp_token *token = cp_lexer_peek_token (parser->lexer);
13829 identifier = cp_parser_identifier (parser);
13830 if (identifier == error_mark_node)
13831 return error_mark_node;
13833 /* Look up the type-name. */
13834 type_decl = cp_parser_lookup_name_simple (parser, identifier, token->location);
13836 if (TREE_CODE (type_decl) == USING_DECL)
13838 if (!DECL_DEPENDENT_P (type_decl))
13839 type_decl = strip_using_decl (type_decl);
13840 else if (USING_DECL_TYPENAME_P (type_decl))
13842 /* We have found a type introduced by a using
13843 declaration at class scope that refers to a dependent
13846 using typename :: [opt] nested-name-specifier unqualified-id ;
13848 type_decl = make_typename_type (TREE_TYPE (type_decl),
13849 DECL_NAME (type_decl),
13850 typename_type, tf_error);
13851 if (type_decl != error_mark_node)
13852 type_decl = TYPE_NAME (type_decl);
13856 if (TREE_CODE (type_decl) != TYPE_DECL
13857 && (objc_is_id (identifier) || objc_is_class_name (identifier)))
13859 /* See if this is an Objective-C type. */
13860 tree protos = cp_parser_objc_protocol_refs_opt (parser);
13861 tree type = objc_get_protocol_qualified_type (identifier, protos);
13863 type_decl = TYPE_NAME (type);
13866 /* Issue an error if we did not find a type-name. */
13867 if (TREE_CODE (type_decl) != TYPE_DECL
13868 /* In Objective-C, we have the complication that class names are
13869 normally type names and start declarations (eg, the
13870 "NSObject" in "NSObject *object;"), but can be used in an
13871 Objective-C 2.0 dot-syntax (as in "NSObject.version") which
13872 is an expression. So, a classname followed by a dot is not a
13873 valid type-name. */
13874 || (objc_is_class_name (TREE_TYPE (type_decl))
13875 && cp_lexer_peek_token (parser->lexer)->type == CPP_DOT))
13877 if (!cp_parser_simulate_error (parser))
13878 cp_parser_name_lookup_error (parser, identifier, type_decl,
13879 NLE_TYPE, token->location);
13880 return error_mark_node;
13882 /* Remember that the name was used in the definition of the
13883 current class so that we can check later to see if the
13884 meaning would have been different after the class was
13885 entirely defined. */
13886 else if (type_decl != error_mark_node
13888 maybe_note_name_used_in_class (identifier, type_decl);
13893 /* Parse an elaborated-type-specifier. Note that the grammar given
13894 here incorporates the resolution to DR68.
13896 elaborated-type-specifier:
13897 class-key :: [opt] nested-name-specifier [opt] identifier
13898 class-key :: [opt] nested-name-specifier [opt] template [opt] template-id
13899 enum-key :: [opt] nested-name-specifier [opt] identifier
13900 typename :: [opt] nested-name-specifier identifier
13901 typename :: [opt] nested-name-specifier template [opt]
13906 elaborated-type-specifier:
13907 class-key attributes :: [opt] nested-name-specifier [opt] identifier
13908 class-key attributes :: [opt] nested-name-specifier [opt]
13909 template [opt] template-id
13910 enum attributes :: [opt] nested-name-specifier [opt] identifier
13912 If IS_FRIEND is TRUE, then this elaborated-type-specifier is being
13913 declared `friend'. If IS_DECLARATION is TRUE, then this
13914 elaborated-type-specifier appears in a decl-specifiers-seq, i.e.,
13915 something is being declared.
13917 Returns the TYPE specified. */
13920 cp_parser_elaborated_type_specifier (cp_parser* parser,
13922 bool is_declaration)
13924 enum tag_types tag_type;
13926 tree type = NULL_TREE;
13927 tree attributes = NULL_TREE;
13929 cp_token *token = NULL;
13931 /* See if we're looking at the `enum' keyword. */
13932 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_ENUM))
13934 /* Consume the `enum' token. */
13935 cp_lexer_consume_token (parser->lexer);
13936 /* Remember that it's an enumeration type. */
13937 tag_type = enum_type;
13938 /* Issue a warning if the `struct' or `class' key (for C++0x scoped
13939 enums) is used here. */
13940 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_CLASS)
13941 || cp_lexer_next_token_is_keyword (parser->lexer, RID_STRUCT))
13943 pedwarn (input_location, 0, "elaborated-type-specifier "
13944 "for a scoped enum must not use the %<%D%> keyword",
13945 cp_lexer_peek_token (parser->lexer)->u.value);
13946 /* Consume the `struct' or `class' and parse it anyway. */
13947 cp_lexer_consume_token (parser->lexer);
13949 /* Parse the attributes. */
13950 attributes = cp_parser_attributes_opt (parser);
13952 /* Or, it might be `typename'. */
13953 else if (cp_lexer_next_token_is_keyword (parser->lexer,
13956 /* Consume the `typename' token. */
13957 cp_lexer_consume_token (parser->lexer);
13958 /* Remember that it's a `typename' type. */
13959 tag_type = typename_type;
13961 /* Otherwise it must be a class-key. */
13964 tag_type = cp_parser_class_key (parser);
13965 if (tag_type == none_type)
13966 return error_mark_node;
13967 /* Parse the attributes. */
13968 attributes = cp_parser_attributes_opt (parser);
13971 /* Look for the `::' operator. */
13972 globalscope = cp_parser_global_scope_opt (parser,
13973 /*current_scope_valid_p=*/false);
13974 /* Look for the nested-name-specifier. */
13975 if (tag_type == typename_type && !globalscope)
13977 if (!cp_parser_nested_name_specifier (parser,
13978 /*typename_keyword_p=*/true,
13979 /*check_dependency_p=*/true,
13982 return error_mark_node;
13985 /* Even though `typename' is not present, the proposed resolution
13986 to Core Issue 180 says that in `class A<T>::B', `B' should be
13987 considered a type-name, even if `A<T>' is dependent. */
13988 cp_parser_nested_name_specifier_opt (parser,
13989 /*typename_keyword_p=*/true,
13990 /*check_dependency_p=*/true,
13993 /* For everything but enumeration types, consider a template-id.
13994 For an enumeration type, consider only a plain identifier. */
13995 if (tag_type != enum_type)
13997 bool template_p = false;
14000 /* Allow the `template' keyword. */
14001 template_p = cp_parser_optional_template_keyword (parser);
14002 /* If we didn't see `template', we don't know if there's a
14003 template-id or not. */
14005 cp_parser_parse_tentatively (parser);
14006 /* Parse the template-id. */
14007 token = cp_lexer_peek_token (parser->lexer);
14008 decl = cp_parser_template_id (parser, template_p,
14009 /*check_dependency_p=*/true,
14011 /* If we didn't find a template-id, look for an ordinary
14013 if (!template_p && !cp_parser_parse_definitely (parser))
14015 /* If DECL is a TEMPLATE_ID_EXPR, and the `typename' keyword is
14016 in effect, then we must assume that, upon instantiation, the
14017 template will correspond to a class. */
14018 else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR
14019 && tag_type == typename_type)
14020 type = make_typename_type (parser->scope, decl,
14022 /*complain=*/tf_error);
14023 /* If the `typename' keyword is in effect and DECL is not a type
14024 decl. Then type is non existant. */
14025 else if (tag_type == typename_type && TREE_CODE (decl) != TYPE_DECL)
14028 type = check_elaborated_type_specifier (tag_type, decl,
14029 /*allow_template_p=*/true);
14034 token = cp_lexer_peek_token (parser->lexer);
14035 identifier = cp_parser_identifier (parser);
14037 if (identifier == error_mark_node)
14039 parser->scope = NULL_TREE;
14040 return error_mark_node;
14043 /* For a `typename', we needn't call xref_tag. */
14044 if (tag_type == typename_type
14045 && TREE_CODE (parser->scope) != NAMESPACE_DECL)
14046 return cp_parser_make_typename_type (parser, parser->scope,
14049 /* Look up a qualified name in the usual way. */
14053 tree ambiguous_decls;
14055 decl = cp_parser_lookup_name (parser, identifier,
14057 /*is_template=*/false,
14058 /*is_namespace=*/false,
14059 /*check_dependency=*/true,
14063 /* If the lookup was ambiguous, an error will already have been
14065 if (ambiguous_decls)
14066 return error_mark_node;
14068 /* If we are parsing friend declaration, DECL may be a
14069 TEMPLATE_DECL tree node here. However, we need to check
14070 whether this TEMPLATE_DECL results in valid code. Consider
14071 the following example:
14074 template <class T> class C {};
14077 template <class T> friend class N::C; // #1, valid code
14079 template <class T> class Y {
14080 friend class N::C; // #2, invalid code
14083 For both case #1 and #2, we arrive at a TEMPLATE_DECL after
14084 name lookup of `N::C'. We see that friend declaration must
14085 be template for the code to be valid. Note that
14086 processing_template_decl does not work here since it is
14087 always 1 for the above two cases. */
14089 decl = (cp_parser_maybe_treat_template_as_class
14090 (decl, /*tag_name_p=*/is_friend
14091 && parser->num_template_parameter_lists));
14093 if (TREE_CODE (decl) != TYPE_DECL)
14095 cp_parser_diagnose_invalid_type_name (parser,
14099 return error_mark_node;
14102 if (TREE_CODE (TREE_TYPE (decl)) != TYPENAME_TYPE)
14104 bool allow_template = (parser->num_template_parameter_lists
14105 || DECL_SELF_REFERENCE_P (decl));
14106 type = check_elaborated_type_specifier (tag_type, decl,
14109 if (type == error_mark_node)
14110 return error_mark_node;
14113 /* Forward declarations of nested types, such as
14118 are invalid unless all components preceding the final '::'
14119 are complete. If all enclosing types are complete, these
14120 declarations become merely pointless.
14122 Invalid forward declarations of nested types are errors
14123 caught elsewhere in parsing. Those that are pointless arrive
14126 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)
14127 && !is_friend && !processing_explicit_instantiation)
14128 warning (0, "declaration %qD does not declare anything", decl);
14130 type = TREE_TYPE (decl);
14134 /* An elaborated-type-specifier sometimes introduces a new type and
14135 sometimes names an existing type. Normally, the rule is that it
14136 introduces a new type only if there is not an existing type of
14137 the same name already in scope. For example, given:
14140 void f() { struct S s; }
14142 the `struct S' in the body of `f' is the same `struct S' as in
14143 the global scope; the existing definition is used. However, if
14144 there were no global declaration, this would introduce a new
14145 local class named `S'.
14147 An exception to this rule applies to the following code:
14149 namespace N { struct S; }
14151 Here, the elaborated-type-specifier names a new type
14152 unconditionally; even if there is already an `S' in the
14153 containing scope this declaration names a new type.
14154 This exception only applies if the elaborated-type-specifier
14155 forms the complete declaration:
14159 A declaration consisting solely of `class-key identifier ;' is
14160 either a redeclaration of the name in the current scope or a
14161 forward declaration of the identifier as a class name. It
14162 introduces the name into the current scope.
14164 We are in this situation precisely when the next token is a `;'.
14166 An exception to the exception is that a `friend' declaration does
14167 *not* name a new type; i.e., given:
14169 struct S { friend struct T; };
14171 `T' is not a new type in the scope of `S'.
14173 Also, `new struct S' or `sizeof (struct S)' never results in the
14174 definition of a new type; a new type can only be declared in a
14175 declaration context. */
14181 /* Friends have special name lookup rules. */
14182 ts = ts_within_enclosing_non_class;
14183 else if (is_declaration
14184 && cp_lexer_next_token_is (parser->lexer,
14186 /* This is a `class-key identifier ;' */
14192 (parser->num_template_parameter_lists
14193 && (cp_parser_next_token_starts_class_definition_p (parser)
14194 || cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)));
14195 /* An unqualified name was used to reference this type, so
14196 there were no qualifying templates. */
14197 if (!cp_parser_check_template_parameters (parser,
14198 /*num_templates=*/0,
14200 /*declarator=*/NULL))
14201 return error_mark_node;
14202 type = xref_tag (tag_type, identifier, ts, template_p);
14206 if (type == error_mark_node)
14207 return error_mark_node;
14209 /* Allow attributes on forward declarations of classes. */
14212 if (TREE_CODE (type) == TYPENAME_TYPE)
14213 warning (OPT_Wattributes,
14214 "attributes ignored on uninstantiated type");
14215 else if (tag_type != enum_type && CLASSTYPE_TEMPLATE_INSTANTIATION (type)
14216 && ! processing_explicit_instantiation)
14217 warning (OPT_Wattributes,
14218 "attributes ignored on template instantiation");
14219 else if (is_declaration && cp_parser_declares_only_class_p (parser))
14220 cplus_decl_attributes (&type, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE);
14222 warning (OPT_Wattributes,
14223 "attributes ignored on elaborated-type-specifier that is not a forward declaration");
14226 if (tag_type != enum_type)
14228 /* Indicate whether this class was declared as a `class' or as a
14230 if (TREE_CODE (type) == RECORD_TYPE)
14231 CLASSTYPE_DECLARED_CLASS (type) = (tag_type == class_type);
14232 cp_parser_check_class_key (tag_type, type);
14235 /* A "<" cannot follow an elaborated type specifier. If that
14236 happens, the user was probably trying to form a template-id. */
14237 cp_parser_check_for_invalid_template_id (parser, type, token->location);
14242 /* Parse an enum-specifier.
14245 enum-head { enumerator-list [opt] }
14246 enum-head { enumerator-list , } [C++0x]
14249 enum-key identifier [opt] enum-base [opt]
14250 enum-key nested-name-specifier identifier enum-base [opt]
14255 enum struct [C++0x]
14258 : type-specifier-seq
14260 opaque-enum-specifier:
14261 enum-key identifier enum-base [opt] ;
14264 enum-key attributes[opt] identifier [opt] enum-base [opt]
14265 { enumerator-list [opt] }attributes[opt]
14266 enum-key attributes[opt] identifier [opt] enum-base [opt]
14267 { enumerator-list, }attributes[opt] [C++0x]
14269 Returns an ENUM_TYPE representing the enumeration, or NULL_TREE
14270 if the token stream isn't an enum-specifier after all. */
14273 cp_parser_enum_specifier (cp_parser* parser)
14276 tree type = NULL_TREE;
14278 tree nested_name_specifier = NULL_TREE;
14280 bool scoped_enum_p = false;
14281 bool has_underlying_type = false;
14282 bool nested_being_defined = false;
14283 bool new_value_list = false;
14284 bool is_new_type = false;
14285 bool is_anonymous = false;
14286 tree underlying_type = NULL_TREE;
14287 cp_token *type_start_token = NULL;
14288 bool saved_colon_corrects_to_scope_p = parser->colon_corrects_to_scope_p;
14290 parser->colon_corrects_to_scope_p = false;
14292 /* Parse tentatively so that we can back up if we don't find a
14294 cp_parser_parse_tentatively (parser);
14296 /* Caller guarantees that the current token is 'enum', an identifier
14297 possibly follows, and the token after that is an opening brace.
14298 If we don't have an identifier, fabricate an anonymous name for
14299 the enumeration being defined. */
14300 cp_lexer_consume_token (parser->lexer);
14302 /* Parse the "class" or "struct", which indicates a scoped
14303 enumeration type in C++0x. */
14304 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_CLASS)
14305 || cp_lexer_next_token_is_keyword (parser->lexer, RID_STRUCT))
14307 if (cxx_dialect < cxx0x)
14308 maybe_warn_cpp0x (CPP0X_SCOPED_ENUMS);
14310 /* Consume the `struct' or `class' token. */
14311 cp_lexer_consume_token (parser->lexer);
14313 scoped_enum_p = true;
14316 attributes = cp_parser_attributes_opt (parser);
14318 /* Clear the qualification. */
14319 parser->scope = NULL_TREE;
14320 parser->qualifying_scope = NULL_TREE;
14321 parser->object_scope = NULL_TREE;
14323 /* Figure out in what scope the declaration is being placed. */
14324 prev_scope = current_scope ();
14326 type_start_token = cp_lexer_peek_token (parser->lexer);
14328 push_deferring_access_checks (dk_no_check);
14329 nested_name_specifier
14330 = cp_parser_nested_name_specifier_opt (parser,
14331 /*typename_keyword_p=*/true,
14332 /*check_dependency_p=*/false,
14334 /*is_declaration=*/false);
14336 if (nested_name_specifier)
14340 identifier = cp_parser_identifier (parser);
14341 name = cp_parser_lookup_name (parser, identifier,
14343 /*is_template=*/false,
14344 /*is_namespace=*/false,
14345 /*check_dependency=*/true,
14346 /*ambiguous_decls=*/NULL,
14350 type = TREE_TYPE (name);
14351 if (TREE_CODE (type) == TYPENAME_TYPE)
14353 /* Are template enums allowed in ISO? */
14354 if (template_parm_scope_p ())
14355 pedwarn (type_start_token->location, OPT_pedantic,
14356 "%qD is an enumeration template", name);
14357 /* ignore a typename reference, for it will be solved by name
14363 error_at (type_start_token->location,
14364 "%qD is not an enumerator-name", identifier);
14368 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
14369 identifier = cp_parser_identifier (parser);
14372 identifier = make_anon_name ();
14373 is_anonymous = true;
14376 pop_deferring_access_checks ();
14378 /* Check for the `:' that denotes a specified underlying type in C++0x.
14379 Note that a ':' could also indicate a bitfield width, however. */
14380 if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
14382 cp_decl_specifier_seq type_specifiers;
14384 /* Consume the `:'. */
14385 cp_lexer_consume_token (parser->lexer);
14387 /* Parse the type-specifier-seq. */
14388 cp_parser_type_specifier_seq (parser, /*is_declaration=*/false,
14389 /*is_trailing_return=*/false,
14392 /* At this point this is surely not elaborated type specifier. */
14393 if (!cp_parser_parse_definitely (parser))
14396 if (cxx_dialect < cxx0x)
14397 maybe_warn_cpp0x (CPP0X_SCOPED_ENUMS);
14399 has_underlying_type = true;
14401 /* If that didn't work, stop. */
14402 if (type_specifiers.type != error_mark_node)
14404 underlying_type = grokdeclarator (NULL, &type_specifiers, TYPENAME,
14405 /*initialized=*/0, NULL);
14406 if (underlying_type == error_mark_node)
14407 underlying_type = NULL_TREE;
14411 /* Look for the `{' but don't consume it yet. */
14412 if (!cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
14414 if (cxx_dialect < cxx0x || (!scoped_enum_p && !underlying_type))
14416 cp_parser_error (parser, "expected %<{%>");
14417 if (has_underlying_type)
14423 /* An opaque-enum-specifier must have a ';' here. */
14424 if ((scoped_enum_p || underlying_type)
14425 && cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
14427 cp_parser_error (parser, "expected %<;%> or %<{%>");
14428 if (has_underlying_type)
14436 if (!has_underlying_type && !cp_parser_parse_definitely (parser))
14439 if (nested_name_specifier)
14441 if (CLASS_TYPE_P (nested_name_specifier))
14443 nested_being_defined = TYPE_BEING_DEFINED (nested_name_specifier);
14444 TYPE_BEING_DEFINED (nested_name_specifier) = 1;
14445 push_scope (nested_name_specifier);
14447 else if (TREE_CODE (nested_name_specifier) == NAMESPACE_DECL)
14449 push_nested_namespace (nested_name_specifier);
14453 /* Issue an error message if type-definitions are forbidden here. */
14454 if (!cp_parser_check_type_definition (parser))
14455 type = error_mark_node;
14457 /* Create the new type. We do this before consuming the opening
14458 brace so the enum will be recorded as being on the line of its
14459 tag (or the 'enum' keyword, if there is no tag). */
14460 type = start_enum (identifier, type, underlying_type,
14461 scoped_enum_p, &is_new_type);
14463 /* If the next token is not '{' it is an opaque-enum-specifier or an
14464 elaborated-type-specifier. */
14465 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
14467 timevar_push (TV_PARSE_ENUM);
14468 if (nested_name_specifier)
14470 /* The following catches invalid code such as:
14471 enum class S<int>::E { A, B, C }; */
14472 if (!processing_specialization
14473 && CLASS_TYPE_P (nested_name_specifier)
14474 && CLASSTYPE_USE_TEMPLATE (nested_name_specifier))
14475 error_at (type_start_token->location, "cannot add an enumerator "
14476 "list to a template instantiation");
14478 /* If that scope does not contain the scope in which the
14479 class was originally declared, the program is invalid. */
14480 if (prev_scope && !is_ancestor (prev_scope, nested_name_specifier))
14482 if (at_namespace_scope_p ())
14483 error_at (type_start_token->location,
14484 "declaration of %qD in namespace %qD which does not "
14486 type, prev_scope, nested_name_specifier);
14488 error_at (type_start_token->location,
14489 "declaration of %qD in %qD which does not enclose %qD",
14490 type, prev_scope, nested_name_specifier);
14491 type = error_mark_node;
14496 begin_scope (sk_scoped_enum, type);
14498 /* Consume the opening brace. */
14499 cp_lexer_consume_token (parser->lexer);
14501 if (type == error_mark_node)
14502 ; /* Nothing to add */
14503 else if (OPAQUE_ENUM_P (type)
14504 || (cxx_dialect > cxx98 && processing_specialization))
14506 new_value_list = true;
14507 SET_OPAQUE_ENUM_P (type, false);
14508 DECL_SOURCE_LOCATION (TYPE_NAME (type)) = type_start_token->location;
14512 error_at (type_start_token->location, "multiple definition of %q#T", type);
14513 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
14514 "previous definition here");
14515 type = error_mark_node;
14518 if (type == error_mark_node)
14519 cp_parser_skip_to_end_of_block_or_statement (parser);
14520 /* If the next token is not '}', then there are some enumerators. */
14521 else if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_BRACE))
14522 cp_parser_enumerator_list (parser, type);
14524 /* Consume the final '}'. */
14525 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
14529 timevar_pop (TV_PARSE_ENUM);
14533 /* If a ';' follows, then it is an opaque-enum-specifier
14534 and additional restrictions apply. */
14535 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
14538 error_at (type_start_token->location,
14539 "opaque-enum-specifier without name");
14540 else if (nested_name_specifier)
14541 error_at (type_start_token->location,
14542 "opaque-enum-specifier must use a simple identifier");
14546 /* Look for trailing attributes to apply to this enumeration, and
14547 apply them if appropriate. */
14548 if (cp_parser_allow_gnu_extensions_p (parser))
14550 tree trailing_attr = cp_parser_attributes_opt (parser);
14551 trailing_attr = chainon (trailing_attr, attributes);
14552 cplus_decl_attributes (&type,
14554 (int) ATTR_FLAG_TYPE_IN_PLACE);
14557 /* Finish up the enumeration. */
14558 if (type != error_mark_node)
14560 if (new_value_list)
14561 finish_enum_value_list (type);
14563 finish_enum (type);
14566 if (nested_name_specifier)
14568 if (CLASS_TYPE_P (nested_name_specifier))
14570 TYPE_BEING_DEFINED (nested_name_specifier) = nested_being_defined;
14571 pop_scope (nested_name_specifier);
14573 else if (TREE_CODE (nested_name_specifier) == NAMESPACE_DECL)
14575 pop_nested_namespace (nested_name_specifier);
14579 parser->colon_corrects_to_scope_p = saved_colon_corrects_to_scope_p;
14583 /* Parse an enumerator-list. The enumerators all have the indicated
14587 enumerator-definition
14588 enumerator-list , enumerator-definition */
14591 cp_parser_enumerator_list (cp_parser* parser, tree type)
14595 /* Parse an enumerator-definition. */
14596 cp_parser_enumerator_definition (parser, type);
14598 /* If the next token is not a ',', we've reached the end of
14600 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
14602 /* Otherwise, consume the `,' and keep going. */
14603 cp_lexer_consume_token (parser->lexer);
14604 /* If the next token is a `}', there is a trailing comma. */
14605 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
14607 if (cxx_dialect < cxx0x && !in_system_header)
14608 pedwarn (input_location, OPT_pedantic,
14609 "comma at end of enumerator list");
14615 /* Parse an enumerator-definition. The enumerator has the indicated
14618 enumerator-definition:
14620 enumerator = constant-expression
14626 cp_parser_enumerator_definition (cp_parser* parser, tree type)
14632 /* Save the input location because we are interested in the location
14633 of the identifier and not the location of the explicit value. */
14634 loc = cp_lexer_peek_token (parser->lexer)->location;
14636 /* Look for the identifier. */
14637 identifier = cp_parser_identifier (parser);
14638 if (identifier == error_mark_node)
14641 /* If the next token is an '=', then there is an explicit value. */
14642 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
14644 /* Consume the `=' token. */
14645 cp_lexer_consume_token (parser->lexer);
14646 /* Parse the value. */
14647 value = cp_parser_constant_expression (parser,
14648 /*allow_non_constant_p=*/false,
14654 /* If we are processing a template, make sure the initializer of the
14655 enumerator doesn't contain any bare template parameter pack. */
14656 if (check_for_bare_parameter_packs (value))
14657 value = error_mark_node;
14659 /* integral_constant_value will pull out this expression, so make sure
14660 it's folded as appropriate. */
14661 value = fold_non_dependent_expr (value);
14663 /* Create the enumerator. */
14664 build_enumerator (identifier, value, type, loc);
14667 /* Parse a namespace-name.
14670 original-namespace-name
14673 Returns the NAMESPACE_DECL for the namespace. */
14676 cp_parser_namespace_name (cp_parser* parser)
14679 tree namespace_decl;
14681 cp_token *token = cp_lexer_peek_token (parser->lexer);
14683 /* Get the name of the namespace. */
14684 identifier = cp_parser_identifier (parser);
14685 if (identifier == error_mark_node)
14686 return error_mark_node;
14688 /* Look up the identifier in the currently active scope. Look only
14689 for namespaces, due to:
14691 [basic.lookup.udir]
14693 When looking up a namespace-name in a using-directive or alias
14694 definition, only namespace names are considered.
14698 [basic.lookup.qual]
14700 During the lookup of a name preceding the :: scope resolution
14701 operator, object, function, and enumerator names are ignored.
14703 (Note that cp_parser_qualifying_entity only calls this
14704 function if the token after the name is the scope resolution
14706 namespace_decl = cp_parser_lookup_name (parser, identifier,
14708 /*is_template=*/false,
14709 /*is_namespace=*/true,
14710 /*check_dependency=*/true,
14711 /*ambiguous_decls=*/NULL,
14713 /* If it's not a namespace, issue an error. */
14714 if (namespace_decl == error_mark_node
14715 || TREE_CODE (namespace_decl) != NAMESPACE_DECL)
14717 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
14718 error_at (token->location, "%qD is not a namespace-name", identifier);
14719 cp_parser_error (parser, "expected namespace-name");
14720 namespace_decl = error_mark_node;
14723 return namespace_decl;
14726 /* Parse a namespace-definition.
14728 namespace-definition:
14729 named-namespace-definition
14730 unnamed-namespace-definition
14732 named-namespace-definition:
14733 original-namespace-definition
14734 extension-namespace-definition
14736 original-namespace-definition:
14737 namespace identifier { namespace-body }
14739 extension-namespace-definition:
14740 namespace original-namespace-name { namespace-body }
14742 unnamed-namespace-definition:
14743 namespace { namespace-body } */
14746 cp_parser_namespace_definition (cp_parser* parser)
14748 tree identifier, attribs;
14749 bool has_visibility;
14752 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_INLINE))
14754 maybe_warn_cpp0x (CPP0X_INLINE_NAMESPACES);
14756 cp_lexer_consume_token (parser->lexer);
14761 /* Look for the `namespace' keyword. */
14762 cp_parser_require_keyword (parser, RID_NAMESPACE, RT_NAMESPACE);
14764 /* Get the name of the namespace. We do not attempt to distinguish
14765 between an original-namespace-definition and an
14766 extension-namespace-definition at this point. The semantic
14767 analysis routines are responsible for that. */
14768 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
14769 identifier = cp_parser_identifier (parser);
14771 identifier = NULL_TREE;
14773 /* Parse any specified attributes. */
14774 attribs = cp_parser_attributes_opt (parser);
14776 /* Look for the `{' to start the namespace. */
14777 cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE);
14778 /* Start the namespace. */
14779 push_namespace (identifier);
14781 /* "inline namespace" is equivalent to a stub namespace definition
14782 followed by a strong using directive. */
14785 tree name_space = current_namespace;
14786 /* Set up namespace association. */
14787 DECL_NAMESPACE_ASSOCIATIONS (name_space)
14788 = tree_cons (CP_DECL_CONTEXT (name_space), NULL_TREE,
14789 DECL_NAMESPACE_ASSOCIATIONS (name_space));
14790 /* Import the contents of the inline namespace. */
14792 do_using_directive (name_space);
14793 push_namespace (identifier);
14796 has_visibility = handle_namespace_attrs (current_namespace, attribs);
14798 /* Parse the body of the namespace. */
14799 cp_parser_namespace_body (parser);
14801 if (has_visibility)
14802 pop_visibility (1);
14804 /* Finish the namespace. */
14806 /* Look for the final `}'. */
14807 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
14810 /* Parse a namespace-body.
14813 declaration-seq [opt] */
14816 cp_parser_namespace_body (cp_parser* parser)
14818 cp_parser_declaration_seq_opt (parser);
14821 /* Parse a namespace-alias-definition.
14823 namespace-alias-definition:
14824 namespace identifier = qualified-namespace-specifier ; */
14827 cp_parser_namespace_alias_definition (cp_parser* parser)
14830 tree namespace_specifier;
14832 cp_token *token = cp_lexer_peek_token (parser->lexer);
14834 /* Look for the `namespace' keyword. */
14835 cp_parser_require_keyword (parser, RID_NAMESPACE, RT_NAMESPACE);
14836 /* Look for the identifier. */
14837 identifier = cp_parser_identifier (parser);
14838 if (identifier == error_mark_node)
14840 /* Look for the `=' token. */
14841 if (!cp_parser_uncommitted_to_tentative_parse_p (parser)
14842 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
14844 error_at (token->location, "%<namespace%> definition is not allowed here");
14845 /* Skip the definition. */
14846 cp_lexer_consume_token (parser->lexer);
14847 if (cp_parser_skip_to_closing_brace (parser))
14848 cp_lexer_consume_token (parser->lexer);
14851 cp_parser_require (parser, CPP_EQ, RT_EQ);
14852 /* Look for the qualified-namespace-specifier. */
14853 namespace_specifier
14854 = cp_parser_qualified_namespace_specifier (parser);
14855 /* Look for the `;' token. */
14856 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
14858 /* Register the alias in the symbol table. */
14859 do_namespace_alias (identifier, namespace_specifier);
14862 /* Parse a qualified-namespace-specifier.
14864 qualified-namespace-specifier:
14865 :: [opt] nested-name-specifier [opt] namespace-name
14867 Returns a NAMESPACE_DECL corresponding to the specified
14871 cp_parser_qualified_namespace_specifier (cp_parser* parser)
14873 /* Look for the optional `::'. */
14874 cp_parser_global_scope_opt (parser,
14875 /*current_scope_valid_p=*/false);
14877 /* Look for the optional nested-name-specifier. */
14878 cp_parser_nested_name_specifier_opt (parser,
14879 /*typename_keyword_p=*/false,
14880 /*check_dependency_p=*/true,
14882 /*is_declaration=*/true);
14884 return cp_parser_namespace_name (parser);
14887 /* Parse a using-declaration, or, if ACCESS_DECLARATION_P is true, an
14888 access declaration.
14891 using typename [opt] :: [opt] nested-name-specifier unqualified-id ;
14892 using :: unqualified-id ;
14894 access-declaration:
14900 cp_parser_using_declaration (cp_parser* parser,
14901 bool access_declaration_p)
14904 bool typename_p = false;
14905 bool global_scope_p;
14909 int oldcount = errorcount;
14910 cp_token *diag_token = NULL;
14912 if (access_declaration_p)
14914 diag_token = cp_lexer_peek_token (parser->lexer);
14915 cp_parser_parse_tentatively (parser);
14919 /* Look for the `using' keyword. */
14920 cp_parser_require_keyword (parser, RID_USING, RT_USING);
14922 /* Peek at the next token. */
14923 token = cp_lexer_peek_token (parser->lexer);
14924 /* See if it's `typename'. */
14925 if (token->keyword == RID_TYPENAME)
14927 /* Remember that we've seen it. */
14929 /* Consume the `typename' token. */
14930 cp_lexer_consume_token (parser->lexer);
14934 /* Look for the optional global scope qualification. */
14936 = (cp_parser_global_scope_opt (parser,
14937 /*current_scope_valid_p=*/false)
14940 /* If we saw `typename', or didn't see `::', then there must be a
14941 nested-name-specifier present. */
14942 if (typename_p || !global_scope_p)
14943 qscope = cp_parser_nested_name_specifier (parser, typename_p,
14944 /*check_dependency_p=*/true,
14946 /*is_declaration=*/true);
14947 /* Otherwise, we could be in either of the two productions. In that
14948 case, treat the nested-name-specifier as optional. */
14950 qscope = cp_parser_nested_name_specifier_opt (parser,
14951 /*typename_keyword_p=*/false,
14952 /*check_dependency_p=*/true,
14954 /*is_declaration=*/true);
14956 qscope = global_namespace;
14958 if (access_declaration_p && cp_parser_error_occurred (parser))
14959 /* Something has already gone wrong; there's no need to parse
14960 further. Since an error has occurred, the return value of
14961 cp_parser_parse_definitely will be false, as required. */
14962 return cp_parser_parse_definitely (parser);
14964 token = cp_lexer_peek_token (parser->lexer);
14965 /* Parse the unqualified-id. */
14966 identifier = cp_parser_unqualified_id (parser,
14967 /*template_keyword_p=*/false,
14968 /*check_dependency_p=*/true,
14969 /*declarator_p=*/true,
14970 /*optional_p=*/false);
14972 if (access_declaration_p)
14974 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
14975 cp_parser_simulate_error (parser);
14976 if (!cp_parser_parse_definitely (parser))
14980 /* The function we call to handle a using-declaration is different
14981 depending on what scope we are in. */
14982 if (qscope == error_mark_node || identifier == error_mark_node)
14984 else if (TREE_CODE (identifier) != IDENTIFIER_NODE
14985 && TREE_CODE (identifier) != BIT_NOT_EXPR)
14986 /* [namespace.udecl]
14988 A using declaration shall not name a template-id. */
14989 error_at (token->location,
14990 "a template-id may not appear in a using-declaration");
14993 if (at_class_scope_p ())
14995 /* Create the USING_DECL. */
14996 decl = do_class_using_decl (parser->scope, identifier);
14998 if (decl && typename_p)
14999 USING_DECL_TYPENAME_P (decl) = 1;
15001 if (check_for_bare_parameter_packs (decl))
15004 /* Add it to the list of members in this class. */
15005 finish_member_declaration (decl);
15009 decl = cp_parser_lookup_name_simple (parser,
15012 if (decl == error_mark_node)
15013 cp_parser_name_lookup_error (parser, identifier,
15016 else if (check_for_bare_parameter_packs (decl))
15018 else if (!at_namespace_scope_p ())
15019 do_local_using_decl (decl, qscope, identifier);
15021 do_toplevel_using_decl (decl, qscope, identifier);
15025 /* Look for the final `;'. */
15026 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
15028 if (access_declaration_p && errorcount == oldcount)
15029 warning_at (diag_token->location, OPT_Wdeprecated,
15030 "access declarations are deprecated "
15031 "in favour of using-declarations; "
15032 "suggestion: add the %<using%> keyword");
15037 /* Parse an alias-declaration.
15040 using identifier attribute-specifier-seq [opt] = type-id */
15043 cp_parser_alias_declaration (cp_parser* parser)
15045 tree id, type, decl, pushed_scope = NULL_TREE, attributes;
15046 location_t id_location;
15047 cp_declarator *declarator;
15048 cp_decl_specifier_seq decl_specs;
15050 const char *saved_message = NULL;
15052 /* Look for the `using' keyword. */
15053 cp_parser_require_keyword (parser, RID_USING, RT_USING);
15054 id_location = cp_lexer_peek_token (parser->lexer)->location;
15055 id = cp_parser_identifier (parser);
15056 if (id == error_mark_node)
15057 return error_mark_node;
15059 attributes = cp_parser_attributes_opt (parser);
15060 if (attributes == error_mark_node)
15061 return error_mark_node;
15063 cp_parser_require (parser, CPP_EQ, RT_EQ);
15065 /* Now we are going to parse the type-id of the declaration. */
15070 "A type-specifier-seq shall not define a class or enumeration
15071 unless it appears in the type-id of an alias-declaration (7.1.3) that
15072 is not the declaration of a template-declaration."
15074 In other words, if we currently are in an alias template, the
15075 type-id should not define a type.
15077 So let's set parser->type_definition_forbidden_message in that
15078 case; cp_parser_check_type_definition (called by
15079 cp_parser_class_specifier) will then emit an error if a type is
15080 defined in the type-id. */
15081 if (parser->num_template_parameter_lists)
15083 saved_message = parser->type_definition_forbidden_message;
15084 parser->type_definition_forbidden_message =
15085 G_("types may not be defined in alias template declarations");
15088 type = cp_parser_type_id (parser);
15090 /* Restore the error message if need be. */
15091 if (parser->num_template_parameter_lists)
15092 parser->type_definition_forbidden_message = saved_message;
15094 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
15096 if (cp_parser_error_occurred (parser))
15097 return error_mark_node;
15099 /* A typedef-name can also be introduced by an alias-declaration. The
15100 identifier following the using keyword becomes a typedef-name. It has
15101 the same semantics as if it were introduced by the typedef
15102 specifier. In particular, it does not define a new type and it shall
15103 not appear in the type-id. */
15105 clear_decl_specs (&decl_specs);
15106 decl_specs.type = type;
15107 decl_specs.attributes = attributes;
15108 ++decl_specs.specs[(int) ds_typedef];
15109 ++decl_specs.specs[(int) ds_alias];
15111 declarator = make_id_declarator (NULL_TREE, id, sfk_none);
15112 declarator->id_loc = id_location;
15114 member_p = at_class_scope_p ();
15116 decl = grokfield (declarator, &decl_specs, NULL_TREE, false,
15117 NULL_TREE, attributes);
15119 decl = start_decl (declarator, &decl_specs, 0,
15120 attributes, NULL_TREE, &pushed_scope);
15121 if (decl == error_mark_node)
15124 cp_finish_decl (decl, NULL_TREE, 0, NULL_TREE, 0);
15127 pop_scope (pushed_scope);
15129 /* If decl is a template, return its TEMPLATE_DECL so that it gets
15130 added into the symbol table; otherwise, return the TYPE_DECL. */
15131 if (DECL_LANG_SPECIFIC (decl)
15132 && DECL_TEMPLATE_INFO (decl)
15133 && PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl)))
15135 decl = DECL_TI_TEMPLATE (decl);
15137 check_member_template (decl);
15143 /* Parse a using-directive.
15146 using namespace :: [opt] nested-name-specifier [opt]
15147 namespace-name ; */
15150 cp_parser_using_directive (cp_parser* parser)
15152 tree namespace_decl;
15155 /* Look for the `using' keyword. */
15156 cp_parser_require_keyword (parser, RID_USING, RT_USING);
15157 /* And the `namespace' keyword. */
15158 cp_parser_require_keyword (parser, RID_NAMESPACE, RT_NAMESPACE);
15159 /* Look for the optional `::' operator. */
15160 cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false);
15161 /* And the optional nested-name-specifier. */
15162 cp_parser_nested_name_specifier_opt (parser,
15163 /*typename_keyword_p=*/false,
15164 /*check_dependency_p=*/true,
15166 /*is_declaration=*/true);
15167 /* Get the namespace being used. */
15168 namespace_decl = cp_parser_namespace_name (parser);
15169 /* And any specified attributes. */
15170 attribs = cp_parser_attributes_opt (parser);
15171 /* Update the symbol table. */
15172 parse_using_directive (namespace_decl, attribs);
15173 /* Look for the final `;'. */
15174 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
15177 /* Parse an asm-definition.
15180 asm ( string-literal ) ;
15185 asm volatile [opt] ( string-literal ) ;
15186 asm volatile [opt] ( string-literal : asm-operand-list [opt] ) ;
15187 asm volatile [opt] ( string-literal : asm-operand-list [opt]
15188 : asm-operand-list [opt] ) ;
15189 asm volatile [opt] ( string-literal : asm-operand-list [opt]
15190 : asm-operand-list [opt]
15191 : asm-clobber-list [opt] ) ;
15192 asm volatile [opt] goto ( string-literal : : asm-operand-list [opt]
15193 : asm-clobber-list [opt]
15194 : asm-goto-list ) ; */
15197 cp_parser_asm_definition (cp_parser* parser)
15200 tree outputs = NULL_TREE;
15201 tree inputs = NULL_TREE;
15202 tree clobbers = NULL_TREE;
15203 tree labels = NULL_TREE;
15205 bool volatile_p = false;
15206 bool extended_p = false;
15207 bool invalid_inputs_p = false;
15208 bool invalid_outputs_p = false;
15209 bool goto_p = false;
15210 required_token missing = RT_NONE;
15212 /* Look for the `asm' keyword. */
15213 cp_parser_require_keyword (parser, RID_ASM, RT_ASM);
15214 /* See if the next token is `volatile'. */
15215 if (cp_parser_allow_gnu_extensions_p (parser)
15216 && cp_lexer_next_token_is_keyword (parser->lexer, RID_VOLATILE))
15218 /* Remember that we saw the `volatile' keyword. */
15220 /* Consume the token. */
15221 cp_lexer_consume_token (parser->lexer);
15223 if (cp_parser_allow_gnu_extensions_p (parser)
15224 && parser->in_function_body
15225 && cp_lexer_next_token_is_keyword (parser->lexer, RID_GOTO))
15227 /* Remember that we saw the `goto' keyword. */
15229 /* Consume the token. */
15230 cp_lexer_consume_token (parser->lexer);
15232 /* Look for the opening `('. */
15233 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
15235 /* Look for the string. */
15236 string = cp_parser_string_literal (parser, false, false);
15237 if (string == error_mark_node)
15239 cp_parser_skip_to_closing_parenthesis (parser, true, false,
15240 /*consume_paren=*/true);
15244 /* If we're allowing GNU extensions, check for the extended assembly
15245 syntax. Unfortunately, the `:' tokens need not be separated by
15246 a space in C, and so, for compatibility, we tolerate that here
15247 too. Doing that means that we have to treat the `::' operator as
15249 if (cp_parser_allow_gnu_extensions_p (parser)
15250 && parser->in_function_body
15251 && (cp_lexer_next_token_is (parser->lexer, CPP_COLON)
15252 || cp_lexer_next_token_is (parser->lexer, CPP_SCOPE)))
15254 bool inputs_p = false;
15255 bool clobbers_p = false;
15256 bool labels_p = false;
15258 /* The extended syntax was used. */
15261 /* Look for outputs. */
15262 if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
15264 /* Consume the `:'. */
15265 cp_lexer_consume_token (parser->lexer);
15266 /* Parse the output-operands. */
15267 if (cp_lexer_next_token_is_not (parser->lexer,
15269 && cp_lexer_next_token_is_not (parser->lexer,
15271 && cp_lexer_next_token_is_not (parser->lexer,
15274 outputs = cp_parser_asm_operand_list (parser);
15276 if (outputs == error_mark_node)
15277 invalid_outputs_p = true;
15279 /* If the next token is `::', there are no outputs, and the
15280 next token is the beginning of the inputs. */
15281 else if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
15282 /* The inputs are coming next. */
15285 /* Look for inputs. */
15287 || cp_lexer_next_token_is (parser->lexer, CPP_COLON))
15289 /* Consume the `:' or `::'. */
15290 cp_lexer_consume_token (parser->lexer);
15291 /* Parse the output-operands. */
15292 if (cp_lexer_next_token_is_not (parser->lexer,
15294 && cp_lexer_next_token_is_not (parser->lexer,
15296 && cp_lexer_next_token_is_not (parser->lexer,
15298 inputs = cp_parser_asm_operand_list (parser);
15300 if (inputs == error_mark_node)
15301 invalid_inputs_p = true;
15303 else if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
15304 /* The clobbers are coming next. */
15307 /* Look for clobbers. */
15309 || cp_lexer_next_token_is (parser->lexer, CPP_COLON))
15312 /* Consume the `:' or `::'. */
15313 cp_lexer_consume_token (parser->lexer);
15314 /* Parse the clobbers. */
15315 if (cp_lexer_next_token_is_not (parser->lexer,
15317 && cp_lexer_next_token_is_not (parser->lexer,
15319 clobbers = cp_parser_asm_clobber_list (parser);
15322 && cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
15323 /* The labels are coming next. */
15326 /* Look for labels. */
15328 || (goto_p && cp_lexer_next_token_is (parser->lexer, CPP_COLON)))
15331 /* Consume the `:' or `::'. */
15332 cp_lexer_consume_token (parser->lexer);
15333 /* Parse the labels. */
15334 labels = cp_parser_asm_label_list (parser);
15337 if (goto_p && !labels_p)
15338 missing = clobbers_p ? RT_COLON : RT_COLON_SCOPE;
15341 missing = RT_COLON_SCOPE;
15343 /* Look for the closing `)'. */
15344 if (!cp_parser_require (parser, missing ? CPP_COLON : CPP_CLOSE_PAREN,
15345 missing ? missing : RT_CLOSE_PAREN))
15346 cp_parser_skip_to_closing_parenthesis (parser, true, false,
15347 /*consume_paren=*/true);
15348 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
15350 if (!invalid_inputs_p && !invalid_outputs_p)
15352 /* Create the ASM_EXPR. */
15353 if (parser->in_function_body)
15355 asm_stmt = finish_asm_stmt (volatile_p, string, outputs,
15356 inputs, clobbers, labels);
15357 /* If the extended syntax was not used, mark the ASM_EXPR. */
15360 tree temp = asm_stmt;
15361 if (TREE_CODE (temp) == CLEANUP_POINT_EXPR)
15362 temp = TREE_OPERAND (temp, 0);
15364 ASM_INPUT_P (temp) = 1;
15368 cgraph_add_asm_node (string);
15372 /* Declarators [gram.dcl.decl] */
15374 /* Parse an init-declarator.
15377 declarator initializer [opt]
15382 declarator asm-specification [opt] attributes [opt] initializer [opt]
15384 function-definition:
15385 decl-specifier-seq [opt] declarator ctor-initializer [opt]
15387 decl-specifier-seq [opt] declarator function-try-block
15391 function-definition:
15392 __extension__ function-definition
15396 function-definition:
15397 decl-specifier-seq [opt] declarator function-transaction-block
15399 The DECL_SPECIFIERS apply to this declarator. Returns a
15400 representation of the entity declared. If MEMBER_P is TRUE, then
15401 this declarator appears in a class scope. The new DECL created by
15402 this declarator is returned.
15404 The CHECKS are access checks that should be performed once we know
15405 what entity is being declared (and, therefore, what classes have
15408 If FUNCTION_DEFINITION_ALLOWED_P then we handle the declarator and
15409 for a function-definition here as well. If the declarator is a
15410 declarator for a function-definition, *FUNCTION_DEFINITION_P will
15411 be TRUE upon return. By that point, the function-definition will
15412 have been completely parsed.
15414 FUNCTION_DEFINITION_P may be NULL if FUNCTION_DEFINITION_ALLOWED_P
15417 If MAYBE_RANGE_FOR_DECL is not NULL, the pointed tree will be set to the
15418 parsed declaration if it is an uninitialized single declarator not followed
15419 by a `;', or to error_mark_node otherwise. Either way, the trailing `;',
15420 if present, will not be consumed. If returned, this declarator will be
15421 created with SD_INITIALIZED but will not call cp_finish_decl. */
15424 cp_parser_init_declarator (cp_parser* parser,
15425 cp_decl_specifier_seq *decl_specifiers,
15426 VEC (deferred_access_check,gc)* checks,
15427 bool function_definition_allowed_p,
15429 int declares_class_or_enum,
15430 bool* function_definition_p,
15431 tree* maybe_range_for_decl)
15433 cp_token *token = NULL, *asm_spec_start_token = NULL,
15434 *attributes_start_token = NULL;
15435 cp_declarator *declarator;
15436 tree prefix_attributes;
15438 tree asm_specification;
15440 tree decl = NULL_TREE;
15442 int is_initialized;
15443 /* Only valid if IS_INITIALIZED is true. In that case, CPP_EQ if
15444 initialized with "= ..", CPP_OPEN_PAREN if initialized with
15446 enum cpp_ttype initialization_kind;
15447 bool is_direct_init = false;
15448 bool is_non_constant_init;
15449 int ctor_dtor_or_conv_p;
15451 tree pushed_scope = NULL_TREE;
15452 bool range_for_decl_p = false;
15454 /* Gather the attributes that were provided with the
15455 decl-specifiers. */
15456 prefix_attributes = decl_specifiers->attributes;
15458 /* Assume that this is not the declarator for a function
15460 if (function_definition_p)
15461 *function_definition_p = false;
15463 /* Defer access checks while parsing the declarator; we cannot know
15464 what names are accessible until we know what is being
15466 resume_deferring_access_checks ();
15468 /* Parse the declarator. */
15469 token = cp_lexer_peek_token (parser->lexer);
15471 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
15472 &ctor_dtor_or_conv_p,
15473 /*parenthesized_p=*/NULL,
15475 /* Gather up the deferred checks. */
15476 stop_deferring_access_checks ();
15478 /* If the DECLARATOR was erroneous, there's no need to go
15480 if (declarator == cp_error_declarator)
15481 return error_mark_node;
15483 /* Check that the number of template-parameter-lists is OK. */
15484 if (!cp_parser_check_declarator_template_parameters (parser, declarator,
15486 return error_mark_node;
15488 if (declares_class_or_enum & 2)
15489 cp_parser_check_for_definition_in_return_type (declarator,
15490 decl_specifiers->type,
15491 decl_specifiers->type_location);
15493 /* Figure out what scope the entity declared by the DECLARATOR is
15494 located in. `grokdeclarator' sometimes changes the scope, so
15495 we compute it now. */
15496 scope = get_scope_of_declarator (declarator);
15498 /* Perform any lookups in the declared type which were thought to be
15499 dependent, but are not in the scope of the declarator. */
15500 decl_specifiers->type
15501 = maybe_update_decl_type (decl_specifiers->type, scope);
15503 /* If we're allowing GNU extensions, look for an asm-specification
15505 if (cp_parser_allow_gnu_extensions_p (parser))
15507 /* Look for an asm-specification. */
15508 asm_spec_start_token = cp_lexer_peek_token (parser->lexer);
15509 asm_specification = cp_parser_asm_specification_opt (parser);
15510 /* And attributes. */
15511 attributes_start_token = cp_lexer_peek_token (parser->lexer);
15512 attributes = cp_parser_attributes_opt (parser);
15516 asm_specification = NULL_TREE;
15517 attributes = NULL_TREE;
15520 /* Peek at the next token. */
15521 token = cp_lexer_peek_token (parser->lexer);
15522 /* Check to see if the token indicates the start of a
15523 function-definition. */
15524 if (function_declarator_p (declarator)
15525 && cp_parser_token_starts_function_definition_p (token))
15527 if (!function_definition_allowed_p)
15529 /* If a function-definition should not appear here, issue an
15531 cp_parser_error (parser,
15532 "a function-definition is not allowed here");
15533 return error_mark_node;
15537 location_t func_brace_location
15538 = cp_lexer_peek_token (parser->lexer)->location;
15540 /* Neither attributes nor an asm-specification are allowed
15541 on a function-definition. */
15542 if (asm_specification)
15543 error_at (asm_spec_start_token->location,
15544 "an asm-specification is not allowed "
15545 "on a function-definition");
15547 error_at (attributes_start_token->location,
15548 "attributes are not allowed on a function-definition");
15549 /* This is a function-definition. */
15550 *function_definition_p = true;
15552 /* Parse the function definition. */
15554 decl = cp_parser_save_member_function_body (parser,
15557 prefix_attributes);
15560 = (cp_parser_function_definition_from_specifiers_and_declarator
15561 (parser, decl_specifiers, prefix_attributes, declarator));
15563 if (decl != error_mark_node && DECL_STRUCT_FUNCTION (decl))
15565 /* This is where the prologue starts... */
15566 DECL_STRUCT_FUNCTION (decl)->function_start_locus
15567 = func_brace_location;
15576 Only in function declarations for constructors, destructors, and
15577 type conversions can the decl-specifier-seq be omitted.
15579 We explicitly postpone this check past the point where we handle
15580 function-definitions because we tolerate function-definitions
15581 that are missing their return types in some modes. */
15582 if (!decl_specifiers->any_specifiers_p && ctor_dtor_or_conv_p <= 0)
15584 cp_parser_error (parser,
15585 "expected constructor, destructor, or type conversion");
15586 return error_mark_node;
15589 /* An `=' or an `(', or an '{' in C++0x, indicates an initializer. */
15590 if (token->type == CPP_EQ
15591 || token->type == CPP_OPEN_PAREN
15592 || token->type == CPP_OPEN_BRACE)
15594 is_initialized = SD_INITIALIZED;
15595 initialization_kind = token->type;
15596 if (maybe_range_for_decl)
15597 *maybe_range_for_decl = error_mark_node;
15599 if (token->type == CPP_EQ
15600 && function_declarator_p (declarator))
15602 cp_token *t2 = cp_lexer_peek_nth_token (parser->lexer, 2);
15603 if (t2->keyword == RID_DEFAULT)
15604 is_initialized = SD_DEFAULTED;
15605 else if (t2->keyword == RID_DELETE)
15606 is_initialized = SD_DELETED;
15611 /* If the init-declarator isn't initialized and isn't followed by a
15612 `,' or `;', it's not a valid init-declarator. */
15613 if (token->type != CPP_COMMA
15614 && token->type != CPP_SEMICOLON)
15616 if (maybe_range_for_decl && *maybe_range_for_decl != error_mark_node)
15617 range_for_decl_p = true;
15620 cp_parser_error (parser, "expected initializer");
15621 return error_mark_node;
15624 is_initialized = SD_UNINITIALIZED;
15625 initialization_kind = CPP_EOF;
15628 /* Because start_decl has side-effects, we should only call it if we
15629 know we're going ahead. By this point, we know that we cannot
15630 possibly be looking at any other construct. */
15631 cp_parser_commit_to_tentative_parse (parser);
15633 /* If the decl specifiers were bad, issue an error now that we're
15634 sure this was intended to be a declarator. Then continue
15635 declaring the variable(s), as int, to try to cut down on further
15637 if (decl_specifiers->any_specifiers_p
15638 && decl_specifiers->type == error_mark_node)
15640 cp_parser_error (parser, "invalid type in declaration");
15641 decl_specifiers->type = integer_type_node;
15644 /* Check to see whether or not this declaration is a friend. */
15645 friend_p = cp_parser_friend_p (decl_specifiers);
15647 /* Enter the newly declared entry in the symbol table. If we're
15648 processing a declaration in a class-specifier, we wait until
15649 after processing the initializer. */
15652 if (parser->in_unbraced_linkage_specification_p)
15653 decl_specifiers->storage_class = sc_extern;
15654 decl = start_decl (declarator, decl_specifiers,
15655 range_for_decl_p? SD_INITIALIZED : is_initialized,
15656 attributes, prefix_attributes,
15658 /* Adjust location of decl if declarator->id_loc is more appropriate:
15659 set, and decl wasn't merged with another decl, in which case its
15660 location would be different from input_location, and more accurate. */
15662 && declarator->id_loc != UNKNOWN_LOCATION
15663 && DECL_SOURCE_LOCATION (decl) == input_location)
15664 DECL_SOURCE_LOCATION (decl) = declarator->id_loc;
15667 /* Enter the SCOPE. That way unqualified names appearing in the
15668 initializer will be looked up in SCOPE. */
15669 pushed_scope = push_scope (scope);
15671 /* Perform deferred access control checks, now that we know in which
15672 SCOPE the declared entity resides. */
15673 if (!member_p && decl)
15675 tree saved_current_function_decl = NULL_TREE;
15677 /* If the entity being declared is a function, pretend that we
15678 are in its scope. If it is a `friend', it may have access to
15679 things that would not otherwise be accessible. */
15680 if (TREE_CODE (decl) == FUNCTION_DECL)
15682 saved_current_function_decl = current_function_decl;
15683 current_function_decl = decl;
15686 /* Perform access checks for template parameters. */
15687 cp_parser_perform_template_parameter_access_checks (checks);
15689 /* Perform the access control checks for the declarator and the
15690 decl-specifiers. */
15691 perform_deferred_access_checks ();
15693 /* Restore the saved value. */
15694 if (TREE_CODE (decl) == FUNCTION_DECL)
15695 current_function_decl = saved_current_function_decl;
15698 /* Parse the initializer. */
15699 initializer = NULL_TREE;
15700 is_direct_init = false;
15701 is_non_constant_init = true;
15702 if (is_initialized)
15704 if (function_declarator_p (declarator))
15706 cp_token *initializer_start_token = cp_lexer_peek_token (parser->lexer);
15707 if (initialization_kind == CPP_EQ)
15708 initializer = cp_parser_pure_specifier (parser);
15711 /* If the declaration was erroneous, we don't really
15712 know what the user intended, so just silently
15713 consume the initializer. */
15714 if (decl != error_mark_node)
15715 error_at (initializer_start_token->location,
15716 "initializer provided for function");
15717 cp_parser_skip_to_closing_parenthesis (parser,
15718 /*recovering=*/true,
15719 /*or_comma=*/false,
15720 /*consume_paren=*/true);
15725 /* We want to record the extra mangling scope for in-class
15726 initializers of class members and initializers of static data
15727 member templates. The former involves deferring
15728 parsing of the initializer until end of class as with default
15729 arguments. So right here we only handle the latter. */
15730 if (!member_p && processing_template_decl)
15731 start_lambda_scope (decl);
15732 initializer = cp_parser_initializer (parser,
15734 &is_non_constant_init);
15735 if (!member_p && processing_template_decl)
15736 finish_lambda_scope ();
15740 /* The old parser allows attributes to appear after a parenthesized
15741 initializer. Mark Mitchell proposed removing this functionality
15742 on the GCC mailing lists on 2002-08-13. This parser accepts the
15743 attributes -- but ignores them. */
15744 if (cp_parser_allow_gnu_extensions_p (parser)
15745 && initialization_kind == CPP_OPEN_PAREN)
15746 if (cp_parser_attributes_opt (parser))
15747 warning (OPT_Wattributes,
15748 "attributes after parenthesized initializer ignored");
15750 /* For an in-class declaration, use `grokfield' to create the
15756 pop_scope (pushed_scope);
15757 pushed_scope = NULL_TREE;
15759 decl = grokfield (declarator, decl_specifiers,
15760 initializer, !is_non_constant_init,
15761 /*asmspec=*/NULL_TREE,
15762 prefix_attributes);
15763 if (decl && TREE_CODE (decl) == FUNCTION_DECL)
15764 cp_parser_save_default_args (parser, decl);
15767 /* Finish processing the declaration. But, skip member
15769 if (!member_p && decl && decl != error_mark_node && !range_for_decl_p)
15771 cp_finish_decl (decl,
15772 initializer, !is_non_constant_init,
15774 /* If the initializer is in parentheses, then this is
15775 a direct-initialization, which means that an
15776 `explicit' constructor is OK. Otherwise, an
15777 `explicit' constructor cannot be used. */
15778 ((is_direct_init || !is_initialized)
15779 ? LOOKUP_NORMAL : LOOKUP_IMPLICIT));
15781 else if ((cxx_dialect != cxx98) && friend_p
15782 && decl && TREE_CODE (decl) == FUNCTION_DECL)
15783 /* Core issue #226 (C++0x only): A default template-argument
15784 shall not be specified in a friend class template
15786 check_default_tmpl_args (decl, current_template_parms, /*is_primary=*/1,
15787 /*is_partial=*/0, /*is_friend_decl=*/1);
15789 if (!friend_p && pushed_scope)
15790 pop_scope (pushed_scope);
15795 /* Parse a declarator.
15799 ptr-operator declarator
15801 abstract-declarator:
15802 ptr-operator abstract-declarator [opt]
15803 direct-abstract-declarator
15808 attributes [opt] direct-declarator
15809 attributes [opt] ptr-operator declarator
15811 abstract-declarator:
15812 attributes [opt] ptr-operator abstract-declarator [opt]
15813 attributes [opt] direct-abstract-declarator
15815 If CTOR_DTOR_OR_CONV_P is not NULL, *CTOR_DTOR_OR_CONV_P is used to
15816 detect constructor, destructor or conversion operators. It is set
15817 to -1 if the declarator is a name, and +1 if it is a
15818 function. Otherwise it is set to zero. Usually you just want to
15819 test for >0, but internally the negative value is used.
15821 (The reason for CTOR_DTOR_OR_CONV_P is that a declaration must have
15822 a decl-specifier-seq unless it declares a constructor, destructor,
15823 or conversion. It might seem that we could check this condition in
15824 semantic analysis, rather than parsing, but that makes it difficult
15825 to handle something like `f()'. We want to notice that there are
15826 no decl-specifiers, and therefore realize that this is an
15827 expression, not a declaration.)
15829 If PARENTHESIZED_P is non-NULL, *PARENTHESIZED_P is set to true iff
15830 the declarator is a direct-declarator of the form "(...)".
15832 MEMBER_P is true iff this declarator is a member-declarator. */
15834 static cp_declarator *
15835 cp_parser_declarator (cp_parser* parser,
15836 cp_parser_declarator_kind dcl_kind,
15837 int* ctor_dtor_or_conv_p,
15838 bool* parenthesized_p,
15841 cp_declarator *declarator;
15842 enum tree_code code;
15843 cp_cv_quals cv_quals;
15845 tree attributes = NULL_TREE;
15847 /* Assume this is not a constructor, destructor, or type-conversion
15849 if (ctor_dtor_or_conv_p)
15850 *ctor_dtor_or_conv_p = 0;
15852 if (cp_parser_allow_gnu_extensions_p (parser))
15853 attributes = cp_parser_attributes_opt (parser);
15855 /* Check for the ptr-operator production. */
15856 cp_parser_parse_tentatively (parser);
15857 /* Parse the ptr-operator. */
15858 code = cp_parser_ptr_operator (parser,
15861 /* If that worked, then we have a ptr-operator. */
15862 if (cp_parser_parse_definitely (parser))
15864 /* If a ptr-operator was found, then this declarator was not
15866 if (parenthesized_p)
15867 *parenthesized_p = true;
15868 /* The dependent declarator is optional if we are parsing an
15869 abstract-declarator. */
15870 if (dcl_kind != CP_PARSER_DECLARATOR_NAMED)
15871 cp_parser_parse_tentatively (parser);
15873 /* Parse the dependent declarator. */
15874 declarator = cp_parser_declarator (parser, dcl_kind,
15875 /*ctor_dtor_or_conv_p=*/NULL,
15876 /*parenthesized_p=*/NULL,
15877 /*member_p=*/false);
15879 /* If we are parsing an abstract-declarator, we must handle the
15880 case where the dependent declarator is absent. */
15881 if (dcl_kind != CP_PARSER_DECLARATOR_NAMED
15882 && !cp_parser_parse_definitely (parser))
15885 declarator = cp_parser_make_indirect_declarator
15886 (code, class_type, cv_quals, declarator);
15888 /* Everything else is a direct-declarator. */
15891 if (parenthesized_p)
15892 *parenthesized_p = cp_lexer_next_token_is (parser->lexer,
15894 declarator = cp_parser_direct_declarator (parser, dcl_kind,
15895 ctor_dtor_or_conv_p,
15899 if (attributes && declarator && declarator != cp_error_declarator)
15900 declarator->attributes = attributes;
15905 /* Parse a direct-declarator or direct-abstract-declarator.
15909 direct-declarator ( parameter-declaration-clause )
15910 cv-qualifier-seq [opt]
15911 exception-specification [opt]
15912 direct-declarator [ constant-expression [opt] ]
15915 direct-abstract-declarator:
15916 direct-abstract-declarator [opt]
15917 ( parameter-declaration-clause )
15918 cv-qualifier-seq [opt]
15919 exception-specification [opt]
15920 direct-abstract-declarator [opt] [ constant-expression [opt] ]
15921 ( abstract-declarator )
15923 Returns a representation of the declarator. DCL_KIND is
15924 CP_PARSER_DECLARATOR_ABSTRACT, if we are parsing a
15925 direct-abstract-declarator. It is CP_PARSER_DECLARATOR_NAMED, if
15926 we are parsing a direct-declarator. It is
15927 CP_PARSER_DECLARATOR_EITHER, if we can accept either - in the case
15928 of ambiguity we prefer an abstract declarator, as per
15929 [dcl.ambig.res]. CTOR_DTOR_OR_CONV_P and MEMBER_P are as for
15930 cp_parser_declarator. */
15932 static cp_declarator *
15933 cp_parser_direct_declarator (cp_parser* parser,
15934 cp_parser_declarator_kind dcl_kind,
15935 int* ctor_dtor_or_conv_p,
15939 cp_declarator *declarator = NULL;
15940 tree scope = NULL_TREE;
15941 bool saved_default_arg_ok_p = parser->default_arg_ok_p;
15942 bool saved_in_declarator_p = parser->in_declarator_p;
15944 tree pushed_scope = NULL_TREE;
15948 /* Peek at the next token. */
15949 token = cp_lexer_peek_token (parser->lexer);
15950 if (token->type == CPP_OPEN_PAREN)
15952 /* This is either a parameter-declaration-clause, or a
15953 parenthesized declarator. When we know we are parsing a
15954 named declarator, it must be a parenthesized declarator
15955 if FIRST is true. For instance, `(int)' is a
15956 parameter-declaration-clause, with an omitted
15957 direct-abstract-declarator. But `((*))', is a
15958 parenthesized abstract declarator. Finally, when T is a
15959 template parameter `(T)' is a
15960 parameter-declaration-clause, and not a parenthesized
15963 We first try and parse a parameter-declaration-clause,
15964 and then try a nested declarator (if FIRST is true).
15966 It is not an error for it not to be a
15967 parameter-declaration-clause, even when FIRST is
15973 The first is the declaration of a function while the
15974 second is the definition of a variable, including its
15977 Having seen only the parenthesis, we cannot know which of
15978 these two alternatives should be selected. Even more
15979 complex are examples like:
15984 The former is a function-declaration; the latter is a
15985 variable initialization.
15987 Thus again, we try a parameter-declaration-clause, and if
15988 that fails, we back out and return. */
15990 if (!first || dcl_kind != CP_PARSER_DECLARATOR_NAMED)
15993 unsigned saved_num_template_parameter_lists;
15994 bool is_declarator = false;
15997 /* In a member-declarator, the only valid interpretation
15998 of a parenthesis is the start of a
15999 parameter-declaration-clause. (It is invalid to
16000 initialize a static data member with a parenthesized
16001 initializer; only the "=" form of initialization is
16004 cp_parser_parse_tentatively (parser);
16006 /* Consume the `('. */
16007 cp_lexer_consume_token (parser->lexer);
16010 /* If this is going to be an abstract declarator, we're
16011 in a declarator and we can't have default args. */
16012 parser->default_arg_ok_p = false;
16013 parser->in_declarator_p = true;
16016 /* Inside the function parameter list, surrounding
16017 template-parameter-lists do not apply. */
16018 saved_num_template_parameter_lists
16019 = parser->num_template_parameter_lists;
16020 parser->num_template_parameter_lists = 0;
16022 begin_scope (sk_function_parms, NULL_TREE);
16024 /* Parse the parameter-declaration-clause. */
16025 params = cp_parser_parameter_declaration_clause (parser);
16027 parser->num_template_parameter_lists
16028 = saved_num_template_parameter_lists;
16030 /* Consume the `)'. */
16031 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
16033 /* If all went well, parse the cv-qualifier-seq and the
16034 exception-specification. */
16035 if (member_p || cp_parser_parse_definitely (parser))
16037 cp_cv_quals cv_quals;
16038 cp_virt_specifiers virt_specifiers;
16039 tree exception_specification;
16042 is_declarator = true;
16044 if (ctor_dtor_or_conv_p)
16045 *ctor_dtor_or_conv_p = *ctor_dtor_or_conv_p < 0;
16048 /* Parse the cv-qualifier-seq. */
16049 cv_quals = cp_parser_cv_qualifier_seq_opt (parser);
16050 /* And the exception-specification. */
16051 exception_specification
16052 = cp_parser_exception_specification_opt (parser);
16053 /* Parse the virt-specifier-seq. */
16054 virt_specifiers = cp_parser_virt_specifier_seq_opt (parser);
16056 late_return = (cp_parser_late_return_type_opt
16057 (parser, member_p ? cv_quals : -1));
16059 /* Create the function-declarator. */
16060 declarator = make_call_declarator (declarator,
16064 exception_specification,
16066 /* Any subsequent parameter lists are to do with
16067 return type, so are not those of the declared
16069 parser->default_arg_ok_p = false;
16072 /* Remove the function parms from scope. */
16073 for (t = current_binding_level->names; t; t = DECL_CHAIN (t))
16074 pop_binding (DECL_NAME (t), t);
16078 /* Repeat the main loop. */
16082 /* If this is the first, we can try a parenthesized
16086 bool saved_in_type_id_in_expr_p;
16088 parser->default_arg_ok_p = saved_default_arg_ok_p;
16089 parser->in_declarator_p = saved_in_declarator_p;
16091 /* Consume the `('. */
16092 cp_lexer_consume_token (parser->lexer);
16093 /* Parse the nested declarator. */
16094 saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
16095 parser->in_type_id_in_expr_p = true;
16097 = cp_parser_declarator (parser, dcl_kind, ctor_dtor_or_conv_p,
16098 /*parenthesized_p=*/NULL,
16100 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
16102 /* Expect a `)'. */
16103 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
16104 declarator = cp_error_declarator;
16105 if (declarator == cp_error_declarator)
16108 goto handle_declarator;
16110 /* Otherwise, we must be done. */
16114 else if ((!first || dcl_kind != CP_PARSER_DECLARATOR_NAMED)
16115 && token->type == CPP_OPEN_SQUARE)
16117 /* Parse an array-declarator. */
16120 if (ctor_dtor_or_conv_p)
16121 *ctor_dtor_or_conv_p = 0;
16124 parser->default_arg_ok_p = false;
16125 parser->in_declarator_p = true;
16126 /* Consume the `['. */
16127 cp_lexer_consume_token (parser->lexer);
16128 /* Peek at the next token. */
16129 token = cp_lexer_peek_token (parser->lexer);
16130 /* If the next token is `]', then there is no
16131 constant-expression. */
16132 if (token->type != CPP_CLOSE_SQUARE)
16134 bool non_constant_p;
16137 = cp_parser_constant_expression (parser,
16138 /*allow_non_constant=*/true,
16140 if (!non_constant_p)
16142 else if (error_operand_p (bounds))
16143 /* Already gave an error. */;
16144 else if (!parser->in_function_body
16145 || current_binding_level->kind == sk_function_parms)
16147 /* Normally, the array bound must be an integral constant
16148 expression. However, as an extension, we allow VLAs
16149 in function scopes as long as they aren't part of a
16150 parameter declaration. */
16151 cp_parser_error (parser,
16152 "array bound is not an integer constant");
16153 bounds = error_mark_node;
16155 else if (processing_template_decl)
16157 /* Remember this wasn't a constant-expression. */
16158 bounds = build_nop (TREE_TYPE (bounds), bounds);
16159 TREE_SIDE_EFFECTS (bounds) = 1;
16163 bounds = NULL_TREE;
16164 /* Look for the closing `]'. */
16165 if (!cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE))
16167 declarator = cp_error_declarator;
16171 declarator = make_array_declarator (declarator, bounds);
16173 else if (first && dcl_kind != CP_PARSER_DECLARATOR_ABSTRACT)
16176 tree qualifying_scope;
16177 tree unqualified_name;
16178 special_function_kind sfk;
16180 bool pack_expansion_p = false;
16181 cp_token *declarator_id_start_token;
16183 /* Parse a declarator-id */
16184 abstract_ok = (dcl_kind == CP_PARSER_DECLARATOR_EITHER);
16187 cp_parser_parse_tentatively (parser);
16189 /* If we see an ellipsis, we should be looking at a
16191 if (token->type == CPP_ELLIPSIS)
16193 /* Consume the `...' */
16194 cp_lexer_consume_token (parser->lexer);
16196 pack_expansion_p = true;
16200 declarator_id_start_token = cp_lexer_peek_token (parser->lexer);
16202 = cp_parser_declarator_id (parser, /*optional_p=*/abstract_ok);
16203 qualifying_scope = parser->scope;
16208 if (!unqualified_name && pack_expansion_p)
16210 /* Check whether an error occurred. */
16211 okay = !cp_parser_error_occurred (parser);
16213 /* We already consumed the ellipsis to mark a
16214 parameter pack, but we have no way to report it,
16215 so abort the tentative parse. We will be exiting
16216 immediately anyway. */
16217 cp_parser_abort_tentative_parse (parser);
16220 okay = cp_parser_parse_definitely (parser);
16223 unqualified_name = error_mark_node;
16224 else if (unqualified_name
16225 && (qualifying_scope
16226 || (TREE_CODE (unqualified_name)
16227 != IDENTIFIER_NODE)))
16229 cp_parser_error (parser, "expected unqualified-id");
16230 unqualified_name = error_mark_node;
16234 if (!unqualified_name)
16236 if (unqualified_name == error_mark_node)
16238 declarator = cp_error_declarator;
16239 pack_expansion_p = false;
16240 declarator->parameter_pack_p = false;
16244 if (qualifying_scope && at_namespace_scope_p ()
16245 && TREE_CODE (qualifying_scope) == TYPENAME_TYPE)
16247 /* In the declaration of a member of a template class
16248 outside of the class itself, the SCOPE will sometimes
16249 be a TYPENAME_TYPE. For example, given:
16251 template <typename T>
16252 int S<T>::R::i = 3;
16254 the SCOPE will be a TYPENAME_TYPE for `S<T>::R'. In
16255 this context, we must resolve S<T>::R to an ordinary
16256 type, rather than a typename type.
16258 The reason we normally avoid resolving TYPENAME_TYPEs
16259 is that a specialization of `S' might render
16260 `S<T>::R' not a type. However, if `S' is
16261 specialized, then this `i' will not be used, so there
16262 is no harm in resolving the types here. */
16265 /* Resolve the TYPENAME_TYPE. */
16266 type = resolve_typename_type (qualifying_scope,
16267 /*only_current_p=*/false);
16268 /* If that failed, the declarator is invalid. */
16269 if (TREE_CODE (type) == TYPENAME_TYPE)
16271 if (typedef_variant_p (type))
16272 error_at (declarator_id_start_token->location,
16273 "cannot define member of dependent typedef "
16276 error_at (declarator_id_start_token->location,
16277 "%<%T::%E%> is not a type",
16278 TYPE_CONTEXT (qualifying_scope),
16279 TYPE_IDENTIFIER (qualifying_scope));
16281 qualifying_scope = type;
16286 if (unqualified_name)
16290 if (qualifying_scope
16291 && CLASS_TYPE_P (qualifying_scope))
16292 class_type = qualifying_scope;
16294 class_type = current_class_type;
16296 if (TREE_CODE (unqualified_name) == TYPE_DECL)
16298 tree name_type = TREE_TYPE (unqualified_name);
16299 if (class_type && same_type_p (name_type, class_type))
16301 if (qualifying_scope
16302 && CLASSTYPE_USE_TEMPLATE (name_type))
16304 error_at (declarator_id_start_token->location,
16305 "invalid use of constructor as a template");
16306 inform (declarator_id_start_token->location,
16307 "use %<%T::%D%> instead of %<%T::%D%> to "
16308 "name the constructor in a qualified name",
16310 DECL_NAME (TYPE_TI_TEMPLATE (class_type)),
16311 class_type, name_type);
16312 declarator = cp_error_declarator;
16316 unqualified_name = constructor_name (class_type);
16320 /* We do not attempt to print the declarator
16321 here because we do not have enough
16322 information about its original syntactic
16324 cp_parser_error (parser, "invalid declarator");
16325 declarator = cp_error_declarator;
16332 if (TREE_CODE (unqualified_name) == BIT_NOT_EXPR)
16333 sfk = sfk_destructor;
16334 else if (IDENTIFIER_TYPENAME_P (unqualified_name))
16335 sfk = sfk_conversion;
16336 else if (/* There's no way to declare a constructor
16337 for an anonymous type, even if the type
16338 got a name for linkage purposes. */
16339 !TYPE_WAS_ANONYMOUS (class_type)
16340 && constructor_name_p (unqualified_name,
16343 unqualified_name = constructor_name (class_type);
16344 sfk = sfk_constructor;
16346 else if (is_overloaded_fn (unqualified_name)
16347 && DECL_CONSTRUCTOR_P (get_first_fn
16348 (unqualified_name)))
16349 sfk = sfk_constructor;
16351 if (ctor_dtor_or_conv_p && sfk != sfk_none)
16352 *ctor_dtor_or_conv_p = -1;
16355 declarator = make_id_declarator (qualifying_scope,
16358 declarator->id_loc = token->location;
16359 declarator->parameter_pack_p = pack_expansion_p;
16361 if (pack_expansion_p)
16362 maybe_warn_variadic_templates ();
16365 handle_declarator:;
16366 scope = get_scope_of_declarator (declarator);
16368 /* Any names that appear after the declarator-id for a
16369 member are looked up in the containing scope. */
16370 pushed_scope = push_scope (scope);
16371 parser->in_declarator_p = true;
16372 if ((ctor_dtor_or_conv_p && *ctor_dtor_or_conv_p)
16373 || (declarator && declarator->kind == cdk_id))
16374 /* Default args are only allowed on function
16376 parser->default_arg_ok_p = saved_default_arg_ok_p;
16378 parser->default_arg_ok_p = false;
16387 /* For an abstract declarator, we might wind up with nothing at this
16388 point. That's an error; the declarator is not optional. */
16390 cp_parser_error (parser, "expected declarator");
16392 /* If we entered a scope, we must exit it now. */
16394 pop_scope (pushed_scope);
16396 parser->default_arg_ok_p = saved_default_arg_ok_p;
16397 parser->in_declarator_p = saved_in_declarator_p;
16402 /* Parse a ptr-operator.
16405 * cv-qualifier-seq [opt]
16407 :: [opt] nested-name-specifier * cv-qualifier-seq [opt]
16412 & cv-qualifier-seq [opt]
16414 Returns INDIRECT_REF if a pointer, or pointer-to-member, was used.
16415 Returns ADDR_EXPR if a reference was used, or NON_LVALUE_EXPR for
16416 an rvalue reference. In the case of a pointer-to-member, *TYPE is
16417 filled in with the TYPE containing the member. *CV_QUALS is
16418 filled in with the cv-qualifier-seq, or TYPE_UNQUALIFIED, if there
16419 are no cv-qualifiers. Returns ERROR_MARK if an error occurred.
16420 Note that the tree codes returned by this function have nothing
16421 to do with the types of trees that will be eventually be created
16422 to represent the pointer or reference type being parsed. They are
16423 just constants with suggestive names. */
16424 static enum tree_code
16425 cp_parser_ptr_operator (cp_parser* parser,
16427 cp_cv_quals *cv_quals)
16429 enum tree_code code = ERROR_MARK;
16432 /* Assume that it's not a pointer-to-member. */
16434 /* And that there are no cv-qualifiers. */
16435 *cv_quals = TYPE_UNQUALIFIED;
16437 /* Peek at the next token. */
16438 token = cp_lexer_peek_token (parser->lexer);
16440 /* If it's a `*', `&' or `&&' we have a pointer or reference. */
16441 if (token->type == CPP_MULT)
16442 code = INDIRECT_REF;
16443 else if (token->type == CPP_AND)
16445 else if ((cxx_dialect != cxx98) &&
16446 token->type == CPP_AND_AND) /* C++0x only */
16447 code = NON_LVALUE_EXPR;
16449 if (code != ERROR_MARK)
16451 /* Consume the `*', `&' or `&&'. */
16452 cp_lexer_consume_token (parser->lexer);
16454 /* A `*' can be followed by a cv-qualifier-seq, and so can a
16455 `&', if we are allowing GNU extensions. (The only qualifier
16456 that can legally appear after `&' is `restrict', but that is
16457 enforced during semantic analysis. */
16458 if (code == INDIRECT_REF
16459 || cp_parser_allow_gnu_extensions_p (parser))
16460 *cv_quals = cp_parser_cv_qualifier_seq_opt (parser);
16464 /* Try the pointer-to-member case. */
16465 cp_parser_parse_tentatively (parser);
16466 /* Look for the optional `::' operator. */
16467 cp_parser_global_scope_opt (parser,
16468 /*current_scope_valid_p=*/false);
16469 /* Look for the nested-name specifier. */
16470 token = cp_lexer_peek_token (parser->lexer);
16471 cp_parser_nested_name_specifier (parser,
16472 /*typename_keyword_p=*/false,
16473 /*check_dependency_p=*/true,
16475 /*is_declaration=*/false);
16476 /* If we found it, and the next token is a `*', then we are
16477 indeed looking at a pointer-to-member operator. */
16478 if (!cp_parser_error_occurred (parser)
16479 && cp_parser_require (parser, CPP_MULT, RT_MULT))
16481 /* Indicate that the `*' operator was used. */
16482 code = INDIRECT_REF;
16484 if (TREE_CODE (parser->scope) == NAMESPACE_DECL)
16485 error_at (token->location, "%qD is a namespace", parser->scope);
16486 else if (TREE_CODE (parser->scope) == ENUMERAL_TYPE)
16487 error_at (token->location, "cannot form pointer to member of "
16488 "non-class %q#T", parser->scope);
16491 /* The type of which the member is a member is given by the
16493 *type = parser->scope;
16494 /* The next name will not be qualified. */
16495 parser->scope = NULL_TREE;
16496 parser->qualifying_scope = NULL_TREE;
16497 parser->object_scope = NULL_TREE;
16498 /* Look for the optional cv-qualifier-seq. */
16499 *cv_quals = cp_parser_cv_qualifier_seq_opt (parser);
16502 /* If that didn't work we don't have a ptr-operator. */
16503 if (!cp_parser_parse_definitely (parser))
16504 cp_parser_error (parser, "expected ptr-operator");
16510 /* Parse an (optional) cv-qualifier-seq.
16513 cv-qualifier cv-qualifier-seq [opt]
16524 Returns a bitmask representing the cv-qualifiers. */
16527 cp_parser_cv_qualifier_seq_opt (cp_parser* parser)
16529 cp_cv_quals cv_quals = TYPE_UNQUALIFIED;
16534 cp_cv_quals cv_qualifier;
16536 /* Peek at the next token. */
16537 token = cp_lexer_peek_token (parser->lexer);
16538 /* See if it's a cv-qualifier. */
16539 switch (token->keyword)
16542 cv_qualifier = TYPE_QUAL_CONST;
16546 cv_qualifier = TYPE_QUAL_VOLATILE;
16550 cv_qualifier = TYPE_QUAL_RESTRICT;
16554 cv_qualifier = TYPE_UNQUALIFIED;
16561 if (cv_quals & cv_qualifier)
16563 error_at (token->location, "duplicate cv-qualifier");
16564 cp_lexer_purge_token (parser->lexer);
16568 cp_lexer_consume_token (parser->lexer);
16569 cv_quals |= cv_qualifier;
16576 /* Parse an (optional) virt-specifier-seq.
16578 virt-specifier-seq:
16579 virt-specifier virt-specifier-seq [opt]
16585 Returns a bitmask representing the virt-specifiers. */
16587 static cp_virt_specifiers
16588 cp_parser_virt_specifier_seq_opt (cp_parser* parser)
16590 cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
16595 cp_virt_specifiers virt_specifier;
16597 /* Peek at the next token. */
16598 token = cp_lexer_peek_token (parser->lexer);
16599 /* See if it's a virt-specifier-qualifier. */
16600 if (token->type != CPP_NAME)
16602 if (!strcmp (IDENTIFIER_POINTER(token->u.value), "override"))
16604 maybe_warn_cpp0x (CPP0X_OVERRIDE_CONTROLS);
16605 virt_specifier = VIRT_SPEC_OVERRIDE;
16607 else if (!strcmp (IDENTIFIER_POINTER(token->u.value), "final"))
16609 maybe_warn_cpp0x (CPP0X_OVERRIDE_CONTROLS);
16610 virt_specifier = VIRT_SPEC_FINAL;
16612 else if (!strcmp (IDENTIFIER_POINTER(token->u.value), "__final"))
16614 virt_specifier = VIRT_SPEC_FINAL;
16619 if (virt_specifiers & virt_specifier)
16621 error_at (token->location, "duplicate virt-specifier");
16622 cp_lexer_purge_token (parser->lexer);
16626 cp_lexer_consume_token (parser->lexer);
16627 virt_specifiers |= virt_specifier;
16630 return virt_specifiers;
16633 /* Used by handling of trailing-return-types and NSDMI, in which 'this'
16634 is in scope even though it isn't real. */
16637 inject_this_parameter (tree ctype, cp_cv_quals quals)
16641 if (current_class_ptr)
16643 /* We don't clear this between NSDMIs. Is it already what we want? */
16644 tree type = TREE_TYPE (TREE_TYPE (current_class_ptr));
16645 if (same_type_ignoring_top_level_qualifiers_p (ctype, type)
16646 && cp_type_quals (type) == quals)
16650 this_parm = build_this_parm (ctype, quals);
16651 /* Clear this first to avoid shortcut in cp_build_indirect_ref. */
16652 current_class_ptr = NULL_TREE;
16654 = cp_build_indirect_ref (this_parm, RO_NULL, tf_warning_or_error);
16655 current_class_ptr = this_parm;
16658 /* Parse a late-specified return type, if any. This is not a separate
16659 non-terminal, but part of a function declarator, which looks like
16661 -> trailing-type-specifier-seq abstract-declarator(opt)
16663 Returns the type indicated by the type-id.
16665 QUALS is either a bitmask of cv_qualifiers or -1 for a non-member
16669 cp_parser_late_return_type_opt (cp_parser* parser, cp_cv_quals quals)
16674 /* Peek at the next token. */
16675 token = cp_lexer_peek_token (parser->lexer);
16676 /* A late-specified return type is indicated by an initial '->'. */
16677 if (token->type != CPP_DEREF)
16680 /* Consume the ->. */
16681 cp_lexer_consume_token (parser->lexer);
16685 /* DR 1207: 'this' is in scope in the trailing return type. */
16686 gcc_assert (current_class_ptr == NULL_TREE);
16687 inject_this_parameter (current_class_type, quals);
16690 type = cp_parser_trailing_type_id (parser);
16693 current_class_ptr = current_class_ref = NULL_TREE;
16698 /* Parse a declarator-id.
16702 :: [opt] nested-name-specifier [opt] type-name
16704 In the `id-expression' case, the value returned is as for
16705 cp_parser_id_expression if the id-expression was an unqualified-id.
16706 If the id-expression was a qualified-id, then a SCOPE_REF is
16707 returned. The first operand is the scope (either a NAMESPACE_DECL
16708 or TREE_TYPE), but the second is still just a representation of an
16712 cp_parser_declarator_id (cp_parser* parser, bool optional_p)
16715 /* The expression must be an id-expression. Assume that qualified
16716 names are the names of types so that:
16719 int S<T>::R::i = 3;
16721 will work; we must treat `S<T>::R' as the name of a type.
16722 Similarly, assume that qualified names are templates, where
16726 int S<T>::R<T>::i = 3;
16729 id = cp_parser_id_expression (parser,
16730 /*template_keyword_p=*/false,
16731 /*check_dependency_p=*/false,
16732 /*template_p=*/NULL,
16733 /*declarator_p=*/true,
16735 if (id && BASELINK_P (id))
16736 id = BASELINK_FUNCTIONS (id);
16740 /* Parse a type-id.
16743 type-specifier-seq abstract-declarator [opt]
16745 Returns the TYPE specified. */
16748 cp_parser_type_id_1 (cp_parser* parser, bool is_template_arg,
16749 bool is_trailing_return)
16751 cp_decl_specifier_seq type_specifier_seq;
16752 cp_declarator *abstract_declarator;
16754 /* Parse the type-specifier-seq. */
16755 cp_parser_type_specifier_seq (parser, /*is_declaration=*/false,
16756 is_trailing_return,
16757 &type_specifier_seq);
16758 if (type_specifier_seq.type == error_mark_node)
16759 return error_mark_node;
16761 /* There might or might not be an abstract declarator. */
16762 cp_parser_parse_tentatively (parser);
16763 /* Look for the declarator. */
16764 abstract_declarator
16765 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_ABSTRACT, NULL,
16766 /*parenthesized_p=*/NULL,
16767 /*member_p=*/false);
16768 /* Check to see if there really was a declarator. */
16769 if (!cp_parser_parse_definitely (parser))
16770 abstract_declarator = NULL;
16772 if (type_specifier_seq.type
16773 && type_uses_auto (type_specifier_seq.type))
16775 /* A type-id with type 'auto' is only ok if the abstract declarator
16776 is a function declarator with a late-specified return type. */
16777 if (abstract_declarator
16778 && abstract_declarator->kind == cdk_function
16779 && abstract_declarator->u.function.late_return_type)
16783 error ("invalid use of %<auto%>");
16784 return error_mark_node;
16788 return groktypename (&type_specifier_seq, abstract_declarator,
16792 static tree cp_parser_type_id (cp_parser *parser)
16794 return cp_parser_type_id_1 (parser, false, false);
16797 static tree cp_parser_template_type_arg (cp_parser *parser)
16800 const char *saved_message = parser->type_definition_forbidden_message;
16801 parser->type_definition_forbidden_message
16802 = G_("types may not be defined in template arguments");
16803 r = cp_parser_type_id_1 (parser, true, false);
16804 parser->type_definition_forbidden_message = saved_message;
16808 static tree cp_parser_trailing_type_id (cp_parser *parser)
16810 return cp_parser_type_id_1 (parser, false, true);
16813 /* Parse a type-specifier-seq.
16815 type-specifier-seq:
16816 type-specifier type-specifier-seq [opt]
16820 type-specifier-seq:
16821 attributes type-specifier-seq [opt]
16823 If IS_DECLARATION is true, we are at the start of a "condition" or
16824 exception-declaration, so we might be followed by a declarator-id.
16826 If IS_TRAILING_RETURN is true, we are in a trailing-return-type,
16827 i.e. we've just seen "->".
16829 Sets *TYPE_SPECIFIER_SEQ to represent the sequence. */
16832 cp_parser_type_specifier_seq (cp_parser* parser,
16833 bool is_declaration,
16834 bool is_trailing_return,
16835 cp_decl_specifier_seq *type_specifier_seq)
16837 bool seen_type_specifier = false;
16838 cp_parser_flags flags = CP_PARSER_FLAGS_OPTIONAL;
16839 cp_token *start_token = NULL;
16841 /* Clear the TYPE_SPECIFIER_SEQ. */
16842 clear_decl_specs (type_specifier_seq);
16844 /* In the context of a trailing return type, enum E { } is an
16845 elaborated-type-specifier followed by a function-body, not an
16847 if (is_trailing_return)
16848 flags |= CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS;
16850 /* Parse the type-specifiers and attributes. */
16853 tree type_specifier;
16854 bool is_cv_qualifier;
16856 /* Check for attributes first. */
16857 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_ATTRIBUTE))
16859 type_specifier_seq->attributes =
16860 chainon (type_specifier_seq->attributes,
16861 cp_parser_attributes_opt (parser));
16865 /* record the token of the beginning of the type specifier seq,
16866 for error reporting purposes*/
16868 start_token = cp_lexer_peek_token (parser->lexer);
16870 /* Look for the type-specifier. */
16871 type_specifier = cp_parser_type_specifier (parser,
16873 type_specifier_seq,
16874 /*is_declaration=*/false,
16877 if (!type_specifier)
16879 /* If the first type-specifier could not be found, this is not a
16880 type-specifier-seq at all. */
16881 if (!seen_type_specifier)
16883 cp_parser_error (parser, "expected type-specifier");
16884 type_specifier_seq->type = error_mark_node;
16887 /* If subsequent type-specifiers could not be found, the
16888 type-specifier-seq is complete. */
16892 seen_type_specifier = true;
16893 /* The standard says that a condition can be:
16895 type-specifier-seq declarator = assignment-expression
16902 we should treat the "S" as a declarator, not as a
16903 type-specifier. The standard doesn't say that explicitly for
16904 type-specifier-seq, but it does say that for
16905 decl-specifier-seq in an ordinary declaration. Perhaps it
16906 would be clearer just to allow a decl-specifier-seq here, and
16907 then add a semantic restriction that if any decl-specifiers
16908 that are not type-specifiers appear, the program is invalid. */
16909 if (is_declaration && !is_cv_qualifier)
16910 flags |= CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES;
16913 cp_parser_check_decl_spec (type_specifier_seq, start_token->location);
16916 /* Parse a parameter-declaration-clause.
16918 parameter-declaration-clause:
16919 parameter-declaration-list [opt] ... [opt]
16920 parameter-declaration-list , ...
16922 Returns a representation for the parameter declarations. A return
16923 value of NULL indicates a parameter-declaration-clause consisting
16924 only of an ellipsis. */
16927 cp_parser_parameter_declaration_clause (cp_parser* parser)
16934 /* Peek at the next token. */
16935 token = cp_lexer_peek_token (parser->lexer);
16936 /* Check for trivial parameter-declaration-clauses. */
16937 if (token->type == CPP_ELLIPSIS)
16939 /* Consume the `...' token. */
16940 cp_lexer_consume_token (parser->lexer);
16943 else if (token->type == CPP_CLOSE_PAREN)
16944 /* There are no parameters. */
16946 #ifndef NO_IMPLICIT_EXTERN_C
16947 if (in_system_header && current_class_type == NULL
16948 && current_lang_name == lang_name_c)
16952 return void_list_node;
16954 /* Check for `(void)', too, which is a special case. */
16955 else if (token->keyword == RID_VOID
16956 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
16957 == CPP_CLOSE_PAREN))
16959 /* Consume the `void' token. */
16960 cp_lexer_consume_token (parser->lexer);
16961 /* There are no parameters. */
16962 return void_list_node;
16965 /* Parse the parameter-declaration-list. */
16966 parameters = cp_parser_parameter_declaration_list (parser, &is_error);
16967 /* If a parse error occurred while parsing the
16968 parameter-declaration-list, then the entire
16969 parameter-declaration-clause is erroneous. */
16973 /* Peek at the next token. */
16974 token = cp_lexer_peek_token (parser->lexer);
16975 /* If it's a `,', the clause should terminate with an ellipsis. */
16976 if (token->type == CPP_COMMA)
16978 /* Consume the `,'. */
16979 cp_lexer_consume_token (parser->lexer);
16980 /* Expect an ellipsis. */
16982 = (cp_parser_require (parser, CPP_ELLIPSIS, RT_ELLIPSIS) != NULL);
16984 /* It might also be `...' if the optional trailing `,' was
16986 else if (token->type == CPP_ELLIPSIS)
16988 /* Consume the `...' token. */
16989 cp_lexer_consume_token (parser->lexer);
16990 /* And remember that we saw it. */
16994 ellipsis_p = false;
16996 /* Finish the parameter list. */
16998 parameters = chainon (parameters, void_list_node);
17003 /* Parse a parameter-declaration-list.
17005 parameter-declaration-list:
17006 parameter-declaration
17007 parameter-declaration-list , parameter-declaration
17009 Returns a representation of the parameter-declaration-list, as for
17010 cp_parser_parameter_declaration_clause. However, the
17011 `void_list_node' is never appended to the list. Upon return,
17012 *IS_ERROR will be true iff an error occurred. */
17015 cp_parser_parameter_declaration_list (cp_parser* parser, bool *is_error)
17017 tree parameters = NULL_TREE;
17018 tree *tail = ¶meters;
17019 bool saved_in_unbraced_linkage_specification_p;
17022 /* Assume all will go well. */
17024 /* The special considerations that apply to a function within an
17025 unbraced linkage specifications do not apply to the parameters
17026 to the function. */
17027 saved_in_unbraced_linkage_specification_p
17028 = parser->in_unbraced_linkage_specification_p;
17029 parser->in_unbraced_linkage_specification_p = false;
17031 /* Look for more parameters. */
17034 cp_parameter_declarator *parameter;
17035 tree decl = error_mark_node;
17036 bool parenthesized_p = false;
17037 /* Parse the parameter. */
17039 = cp_parser_parameter_declaration (parser,
17040 /*template_parm_p=*/false,
17043 /* We don't know yet if the enclosing context is deprecated, so wait
17044 and warn in grokparms if appropriate. */
17045 deprecated_state = DEPRECATED_SUPPRESS;
17048 decl = grokdeclarator (parameter->declarator,
17049 ¶meter->decl_specifiers,
17051 parameter->default_argument != NULL_TREE,
17052 ¶meter->decl_specifiers.attributes);
17054 deprecated_state = DEPRECATED_NORMAL;
17056 /* If a parse error occurred parsing the parameter declaration,
17057 then the entire parameter-declaration-list is erroneous. */
17058 if (decl == error_mark_node)
17061 parameters = error_mark_node;
17065 if (parameter->decl_specifiers.attributes)
17066 cplus_decl_attributes (&decl,
17067 parameter->decl_specifiers.attributes,
17069 if (DECL_NAME (decl))
17070 decl = pushdecl (decl);
17072 if (decl != error_mark_node)
17074 retrofit_lang_decl (decl);
17075 DECL_PARM_INDEX (decl) = ++index;
17076 DECL_PARM_LEVEL (decl) = function_parm_depth ();
17079 /* Add the new parameter to the list. */
17080 *tail = build_tree_list (parameter->default_argument, decl);
17081 tail = &TREE_CHAIN (*tail);
17083 /* Peek at the next token. */
17084 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_PAREN)
17085 || cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS)
17086 /* These are for Objective-C++ */
17087 || cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)
17088 || cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
17089 /* The parameter-declaration-list is complete. */
17091 else if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
17095 /* Peek at the next token. */
17096 token = cp_lexer_peek_nth_token (parser->lexer, 2);
17097 /* If it's an ellipsis, then the list is complete. */
17098 if (token->type == CPP_ELLIPSIS)
17100 /* Otherwise, there must be more parameters. Consume the
17102 cp_lexer_consume_token (parser->lexer);
17103 /* When parsing something like:
17105 int i(float f, double d)
17107 we can tell after seeing the declaration for "f" that we
17108 are not looking at an initialization of a variable "i",
17109 but rather at the declaration of a function "i".
17111 Due to the fact that the parsing of template arguments
17112 (as specified to a template-id) requires backtracking we
17113 cannot use this technique when inside a template argument
17115 if (!parser->in_template_argument_list_p
17116 && !parser->in_type_id_in_expr_p
17117 && cp_parser_uncommitted_to_tentative_parse_p (parser)
17118 /* However, a parameter-declaration of the form
17119 "foat(f)" (which is a valid declaration of a
17120 parameter "f") can also be interpreted as an
17121 expression (the conversion of "f" to "float"). */
17122 && !parenthesized_p)
17123 cp_parser_commit_to_tentative_parse (parser);
17127 cp_parser_error (parser, "expected %<,%> or %<...%>");
17128 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
17129 cp_parser_skip_to_closing_parenthesis (parser,
17130 /*recovering=*/true,
17131 /*or_comma=*/false,
17132 /*consume_paren=*/false);
17137 parser->in_unbraced_linkage_specification_p
17138 = saved_in_unbraced_linkage_specification_p;
17143 /* Parse a parameter declaration.
17145 parameter-declaration:
17146 decl-specifier-seq ... [opt] declarator
17147 decl-specifier-seq declarator = assignment-expression
17148 decl-specifier-seq ... [opt] abstract-declarator [opt]
17149 decl-specifier-seq abstract-declarator [opt] = assignment-expression
17151 If TEMPLATE_PARM_P is TRUE, then this parameter-declaration
17152 declares a template parameter. (In that case, a non-nested `>'
17153 token encountered during the parsing of the assignment-expression
17154 is not interpreted as a greater-than operator.)
17156 Returns a representation of the parameter, or NULL if an error
17157 occurs. If PARENTHESIZED_P is non-NULL, *PARENTHESIZED_P is set to
17158 true iff the declarator is of the form "(p)". */
17160 static cp_parameter_declarator *
17161 cp_parser_parameter_declaration (cp_parser *parser,
17162 bool template_parm_p,
17163 bool *parenthesized_p)
17165 int declares_class_or_enum;
17166 cp_decl_specifier_seq decl_specifiers;
17167 cp_declarator *declarator;
17168 tree default_argument;
17169 cp_token *token = NULL, *declarator_token_start = NULL;
17170 const char *saved_message;
17172 /* In a template parameter, `>' is not an operator.
17176 When parsing a default template-argument for a non-type
17177 template-parameter, the first non-nested `>' is taken as the end
17178 of the template parameter-list rather than a greater-than
17181 /* Type definitions may not appear in parameter types. */
17182 saved_message = parser->type_definition_forbidden_message;
17183 parser->type_definition_forbidden_message
17184 = G_("types may not be defined in parameter types");
17186 /* Parse the declaration-specifiers. */
17187 cp_parser_decl_specifier_seq (parser,
17188 CP_PARSER_FLAGS_NONE,
17190 &declares_class_or_enum);
17192 /* Complain about missing 'typename' or other invalid type names. */
17193 if (!decl_specifiers.any_type_specifiers_p)
17194 cp_parser_parse_and_diagnose_invalid_type_name (parser);
17196 /* If an error occurred, there's no reason to attempt to parse the
17197 rest of the declaration. */
17198 if (cp_parser_error_occurred (parser))
17200 parser->type_definition_forbidden_message = saved_message;
17204 /* Peek at the next token. */
17205 token = cp_lexer_peek_token (parser->lexer);
17207 /* If the next token is a `)', `,', `=', `>', or `...', then there
17208 is no declarator. However, when variadic templates are enabled,
17209 there may be a declarator following `...'. */
17210 if (token->type == CPP_CLOSE_PAREN
17211 || token->type == CPP_COMMA
17212 || token->type == CPP_EQ
17213 || token->type == CPP_GREATER)
17216 if (parenthesized_p)
17217 *parenthesized_p = false;
17219 /* Otherwise, there should be a declarator. */
17222 bool saved_default_arg_ok_p = parser->default_arg_ok_p;
17223 parser->default_arg_ok_p = false;
17225 /* After seeing a decl-specifier-seq, if the next token is not a
17226 "(", there is no possibility that the code is a valid
17227 expression. Therefore, if parsing tentatively, we commit at
17229 if (!parser->in_template_argument_list_p
17230 /* In an expression context, having seen:
17234 we cannot be sure whether we are looking at a
17235 function-type (taking a "char" as a parameter) or a cast
17236 of some object of type "char" to "int". */
17237 && !parser->in_type_id_in_expr_p
17238 && cp_parser_uncommitted_to_tentative_parse_p (parser)
17239 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE)
17240 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_PAREN))
17241 cp_parser_commit_to_tentative_parse (parser);
17242 /* Parse the declarator. */
17243 declarator_token_start = token;
17244 declarator = cp_parser_declarator (parser,
17245 CP_PARSER_DECLARATOR_EITHER,
17246 /*ctor_dtor_or_conv_p=*/NULL,
17248 /*member_p=*/false);
17249 parser->default_arg_ok_p = saved_default_arg_ok_p;
17250 /* After the declarator, allow more attributes. */
17251 decl_specifiers.attributes
17252 = chainon (decl_specifiers.attributes,
17253 cp_parser_attributes_opt (parser));
17256 /* If the next token is an ellipsis, and we have not seen a
17257 declarator name, and the type of the declarator contains parameter
17258 packs but it is not a TYPE_PACK_EXPANSION, then we actually have
17259 a parameter pack expansion expression. Otherwise, leave the
17260 ellipsis for a C-style variadic function. */
17261 token = cp_lexer_peek_token (parser->lexer);
17262 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
17264 tree type = decl_specifiers.type;
17266 if (type && DECL_P (type))
17267 type = TREE_TYPE (type);
17270 && TREE_CODE (type) != TYPE_PACK_EXPANSION
17271 && declarator_can_be_parameter_pack (declarator)
17272 && (!declarator || !declarator->parameter_pack_p)
17273 && uses_parameter_packs (type))
17275 /* Consume the `...'. */
17276 cp_lexer_consume_token (parser->lexer);
17277 maybe_warn_variadic_templates ();
17279 /* Build a pack expansion type */
17281 declarator->parameter_pack_p = true;
17283 decl_specifiers.type = make_pack_expansion (type);
17287 /* The restriction on defining new types applies only to the type
17288 of the parameter, not to the default argument. */
17289 parser->type_definition_forbidden_message = saved_message;
17291 /* If the next token is `=', then process a default argument. */
17292 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
17294 token = cp_lexer_peek_token (parser->lexer);
17295 /* If we are defining a class, then the tokens that make up the
17296 default argument must be saved and processed later. */
17297 if (!template_parm_p && at_class_scope_p ()
17298 && TYPE_BEING_DEFINED (current_class_type)
17299 && !LAMBDA_TYPE_P (current_class_type))
17300 default_argument = cp_parser_cache_defarg (parser, /*nsdmi=*/false);
17301 /* Outside of a class definition, we can just parse the
17302 assignment-expression. */
17305 = cp_parser_default_argument (parser, template_parm_p);
17307 if (!parser->default_arg_ok_p)
17309 if (flag_permissive)
17310 warning (0, "deprecated use of default argument for parameter of non-function");
17313 error_at (token->location,
17314 "default arguments are only "
17315 "permitted for function parameters");
17316 default_argument = NULL_TREE;
17319 else if ((declarator && declarator->parameter_pack_p)
17320 || (decl_specifiers.type
17321 && PACK_EXPANSION_P (decl_specifiers.type)))
17323 /* Find the name of the parameter pack. */
17324 cp_declarator *id_declarator = declarator;
17325 while (id_declarator && id_declarator->kind != cdk_id)
17326 id_declarator = id_declarator->declarator;
17328 if (id_declarator && id_declarator->kind == cdk_id)
17329 error_at (declarator_token_start->location,
17331 ? G_("template parameter pack %qD "
17332 "cannot have a default argument")
17333 : G_("parameter pack %qD cannot have "
17334 "a default argument"),
17335 id_declarator->u.id.unqualified_name);
17337 error_at (declarator_token_start->location,
17339 ? G_("template parameter pack cannot have "
17340 "a default argument")
17341 : G_("parameter pack cannot have a "
17342 "default argument"));
17344 default_argument = NULL_TREE;
17348 default_argument = NULL_TREE;
17350 return make_parameter_declarator (&decl_specifiers,
17355 /* Parse a default argument and return it.
17357 TEMPLATE_PARM_P is true if this is a default argument for a
17358 non-type template parameter. */
17360 cp_parser_default_argument (cp_parser *parser, bool template_parm_p)
17362 tree default_argument = NULL_TREE;
17363 bool saved_greater_than_is_operator_p;
17364 bool saved_local_variables_forbidden_p;
17365 bool non_constant_p, is_direct_init;
17367 /* Make sure that PARSER->GREATER_THAN_IS_OPERATOR_P is
17369 saved_greater_than_is_operator_p = parser->greater_than_is_operator_p;
17370 parser->greater_than_is_operator_p = !template_parm_p;
17371 /* Local variable names (and the `this' keyword) may not
17372 appear in a default argument. */
17373 saved_local_variables_forbidden_p = parser->local_variables_forbidden_p;
17374 parser->local_variables_forbidden_p = true;
17375 /* Parse the assignment-expression. */
17376 if (template_parm_p)
17377 push_deferring_access_checks (dk_no_deferred);
17379 = cp_parser_initializer (parser, &is_direct_init, &non_constant_p);
17380 if (BRACE_ENCLOSED_INITIALIZER_P (default_argument))
17381 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
17382 if (template_parm_p)
17383 pop_deferring_access_checks ();
17384 parser->greater_than_is_operator_p = saved_greater_than_is_operator_p;
17385 parser->local_variables_forbidden_p = saved_local_variables_forbidden_p;
17387 return default_argument;
17390 /* Parse a function-body.
17393 compound_statement */
17396 cp_parser_function_body (cp_parser *parser)
17398 cp_parser_compound_statement (parser, NULL, false, true);
17401 /* Parse a ctor-initializer-opt followed by a function-body. Return
17402 true if a ctor-initializer was present. */
17405 cp_parser_ctor_initializer_opt_and_function_body (cp_parser *parser)
17408 bool ctor_initializer_p;
17409 const bool check_body_p =
17410 DECL_CONSTRUCTOR_P (current_function_decl)
17411 && DECL_DECLARED_CONSTEXPR_P (current_function_decl);
17414 /* Begin the function body. */
17415 body = begin_function_body ();
17416 /* Parse the optional ctor-initializer. */
17417 ctor_initializer_p = cp_parser_ctor_initializer_opt (parser);
17419 /* If we're parsing a constexpr constructor definition, we need
17420 to check that the constructor body is indeed empty. However,
17421 before we get to cp_parser_function_body lot of junk has been
17422 generated, so we can't just check that we have an empty block.
17423 Rather we take a snapshot of the outermost block, and check whether
17424 cp_parser_function_body changed its state. */
17427 list = cur_stmt_list;
17428 if (STATEMENT_LIST_TAIL (list))
17429 last = STATEMENT_LIST_TAIL (list)->stmt;
17431 /* Parse the function-body. */
17432 cp_parser_function_body (parser);
17434 check_constexpr_ctor_body (last, list);
17435 /* Finish the function body. */
17436 finish_function_body (body);
17438 return ctor_initializer_p;
17441 /* Parse an initializer.
17444 = initializer-clause
17445 ( expression-list )
17447 Returns an expression representing the initializer. If no
17448 initializer is present, NULL_TREE is returned.
17450 *IS_DIRECT_INIT is set to FALSE if the `= initializer-clause'
17451 production is used, and TRUE otherwise. *IS_DIRECT_INIT is
17452 set to TRUE if there is no initializer present. If there is an
17453 initializer, and it is not a constant-expression, *NON_CONSTANT_P
17454 is set to true; otherwise it is set to false. */
17457 cp_parser_initializer (cp_parser* parser, bool* is_direct_init,
17458 bool* non_constant_p)
17463 /* Peek at the next token. */
17464 token = cp_lexer_peek_token (parser->lexer);
17466 /* Let our caller know whether or not this initializer was
17468 *is_direct_init = (token->type != CPP_EQ);
17469 /* Assume that the initializer is constant. */
17470 *non_constant_p = false;
17472 if (token->type == CPP_EQ)
17474 /* Consume the `='. */
17475 cp_lexer_consume_token (parser->lexer);
17476 /* Parse the initializer-clause. */
17477 init = cp_parser_initializer_clause (parser, non_constant_p);
17479 else if (token->type == CPP_OPEN_PAREN)
17482 vec = cp_parser_parenthesized_expression_list (parser, non_attr,
17484 /*allow_expansion_p=*/true,
17487 return error_mark_node;
17488 init = build_tree_list_vec (vec);
17489 release_tree_vector (vec);
17491 else if (token->type == CPP_OPEN_BRACE)
17493 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
17494 init = cp_parser_braced_list (parser, non_constant_p);
17495 CONSTRUCTOR_IS_DIRECT_INIT (init) = 1;
17499 /* Anything else is an error. */
17500 cp_parser_error (parser, "expected initializer");
17501 init = error_mark_node;
17507 /* Parse an initializer-clause.
17509 initializer-clause:
17510 assignment-expression
17513 Returns an expression representing the initializer.
17515 If the `assignment-expression' production is used the value
17516 returned is simply a representation for the expression.
17518 Otherwise, calls cp_parser_braced_list. */
17521 cp_parser_initializer_clause (cp_parser* parser, bool* non_constant_p)
17525 /* Assume the expression is constant. */
17526 *non_constant_p = false;
17528 /* If it is not a `{', then we are looking at an
17529 assignment-expression. */
17530 if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE))
17533 = cp_parser_constant_expression (parser,
17534 /*allow_non_constant_p=*/true,
17538 initializer = cp_parser_braced_list (parser, non_constant_p);
17540 return initializer;
17543 /* Parse a brace-enclosed initializer list.
17546 { initializer-list , [opt] }
17549 Returns a CONSTRUCTOR. The CONSTRUCTOR_ELTS will be
17550 the elements of the initializer-list (or NULL, if the last
17551 production is used). The TREE_TYPE for the CONSTRUCTOR will be
17552 NULL_TREE. There is no way to detect whether or not the optional
17553 trailing `,' was provided. NON_CONSTANT_P is as for
17554 cp_parser_initializer. */
17557 cp_parser_braced_list (cp_parser* parser, bool* non_constant_p)
17561 /* Consume the `{' token. */
17562 cp_lexer_consume_token (parser->lexer);
17563 /* Create a CONSTRUCTOR to represent the braced-initializer. */
17564 initializer = make_node (CONSTRUCTOR);
17565 /* If it's not a `}', then there is a non-trivial initializer. */
17566 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_BRACE))
17568 /* Parse the initializer list. */
17569 CONSTRUCTOR_ELTS (initializer)
17570 = cp_parser_initializer_list (parser, non_constant_p);
17571 /* A trailing `,' token is allowed. */
17572 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
17573 cp_lexer_consume_token (parser->lexer);
17575 /* Now, there should be a trailing `}'. */
17576 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
17577 TREE_TYPE (initializer) = init_list_type_node;
17578 return initializer;
17581 /* Parse an initializer-list.
17584 initializer-clause ... [opt]
17585 initializer-list , initializer-clause ... [opt]
17590 designation initializer-clause ...[opt]
17591 initializer-list , designation initializer-clause ...[opt]
17596 [ constant-expression ] =
17598 Returns a VEC of constructor_elt. The VALUE of each elt is an expression
17599 for the initializer. If the INDEX of the elt is non-NULL, it is the
17600 IDENTIFIER_NODE naming the field to initialize. NON_CONSTANT_P is
17601 as for cp_parser_initializer. */
17603 static VEC(constructor_elt,gc) *
17604 cp_parser_initializer_list (cp_parser* parser, bool* non_constant_p)
17606 VEC(constructor_elt,gc) *v = NULL;
17608 /* Assume all of the expressions are constant. */
17609 *non_constant_p = false;
17611 /* Parse the rest of the list. */
17617 bool clause_non_constant_p;
17619 /* If the next token is an identifier and the following one is a
17620 colon, we are looking at the GNU designated-initializer
17622 if (cp_parser_allow_gnu_extensions_p (parser)
17623 && cp_lexer_next_token_is (parser->lexer, CPP_NAME)
17624 && cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_COLON)
17626 /* Warn the user that they are using an extension. */
17627 pedwarn (input_location, OPT_pedantic,
17628 "ISO C++ does not allow designated initializers");
17629 /* Consume the identifier. */
17630 designator = cp_lexer_consume_token (parser->lexer)->u.value;
17631 /* Consume the `:'. */
17632 cp_lexer_consume_token (parser->lexer);
17634 /* Also handle the C99 syntax, '. id ='. */
17635 else if (cp_parser_allow_gnu_extensions_p (parser)
17636 && cp_lexer_next_token_is (parser->lexer, CPP_DOT)
17637 && cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_NAME
17638 && cp_lexer_peek_nth_token (parser->lexer, 3)->type == CPP_EQ)
17640 /* Warn the user that they are using an extension. */
17641 pedwarn (input_location, OPT_pedantic,
17642 "ISO C++ does not allow C99 designated initializers");
17643 /* Consume the `.'. */
17644 cp_lexer_consume_token (parser->lexer);
17645 /* Consume the identifier. */
17646 designator = cp_lexer_consume_token (parser->lexer)->u.value;
17647 /* Consume the `='. */
17648 cp_lexer_consume_token (parser->lexer);
17650 /* Also handle C99 array designators, '[ const ] ='. */
17651 else if (cp_parser_allow_gnu_extensions_p (parser)
17652 && !c_dialect_objc ()
17653 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
17655 /* In C++11, [ could start a lambda-introducer. */
17656 cp_parser_parse_tentatively (parser);
17657 cp_lexer_consume_token (parser->lexer);
17658 designator = cp_parser_constant_expression (parser, false, NULL);
17659 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
17660 cp_parser_require (parser, CPP_EQ, RT_EQ);
17661 if (!cp_parser_parse_definitely (parser))
17662 designator = NULL_TREE;
17665 designator = NULL_TREE;
17667 /* Parse the initializer. */
17668 initializer = cp_parser_initializer_clause (parser,
17669 &clause_non_constant_p);
17670 /* If any clause is non-constant, so is the entire initializer. */
17671 if (clause_non_constant_p)
17672 *non_constant_p = true;
17674 /* If we have an ellipsis, this is an initializer pack
17676 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
17678 /* Consume the `...'. */
17679 cp_lexer_consume_token (parser->lexer);
17681 /* Turn the initializer into an initializer expansion. */
17682 initializer = make_pack_expansion (initializer);
17685 /* Add it to the vector. */
17686 CONSTRUCTOR_APPEND_ELT (v, designator, initializer);
17688 /* If the next token is not a comma, we have reached the end of
17690 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
17693 /* Peek at the next token. */
17694 token = cp_lexer_peek_nth_token (parser->lexer, 2);
17695 /* If the next token is a `}', then we're still done. An
17696 initializer-clause can have a trailing `,' after the
17697 initializer-list and before the closing `}'. */
17698 if (token->type == CPP_CLOSE_BRACE)
17701 /* Consume the `,' token. */
17702 cp_lexer_consume_token (parser->lexer);
17708 /* Classes [gram.class] */
17710 /* Parse a class-name.
17716 TYPENAME_KEYWORD_P is true iff the `typename' keyword has been used
17717 to indicate that names looked up in dependent types should be
17718 assumed to be types. TEMPLATE_KEYWORD_P is true iff the `template'
17719 keyword has been used to indicate that the name that appears next
17720 is a template. TAG_TYPE indicates the explicit tag given before
17721 the type name, if any. If CHECK_DEPENDENCY_P is FALSE, names are
17722 looked up in dependent scopes. If CLASS_HEAD_P is TRUE, this class
17723 is the class being defined in a class-head.
17725 Returns the TYPE_DECL representing the class. */
17728 cp_parser_class_name (cp_parser *parser,
17729 bool typename_keyword_p,
17730 bool template_keyword_p,
17731 enum tag_types tag_type,
17732 bool check_dependency_p,
17734 bool is_declaration)
17740 tree identifier = NULL_TREE;
17742 /* All class-names start with an identifier. */
17743 token = cp_lexer_peek_token (parser->lexer);
17744 if (token->type != CPP_NAME && token->type != CPP_TEMPLATE_ID)
17746 cp_parser_error (parser, "expected class-name");
17747 return error_mark_node;
17750 /* PARSER->SCOPE can be cleared when parsing the template-arguments
17751 to a template-id, so we save it here. */
17752 scope = parser->scope;
17753 if (scope == error_mark_node)
17754 return error_mark_node;
17756 /* Any name names a type if we're following the `typename' keyword
17757 in a qualified name where the enclosing scope is type-dependent. */
17758 typename_p = (typename_keyword_p && scope && TYPE_P (scope)
17759 && dependent_type_p (scope));
17760 /* Handle the common case (an identifier, but not a template-id)
17762 if (token->type == CPP_NAME
17763 && !cp_parser_nth_token_starts_template_argument_list_p (parser, 2))
17765 cp_token *identifier_token;
17768 /* Look for the identifier. */
17769 identifier_token = cp_lexer_peek_token (parser->lexer);
17770 ambiguous_p = identifier_token->ambiguous_p;
17771 identifier = cp_parser_identifier (parser);
17772 /* If the next token isn't an identifier, we are certainly not
17773 looking at a class-name. */
17774 if (identifier == error_mark_node)
17775 decl = error_mark_node;
17776 /* If we know this is a type-name, there's no need to look it
17778 else if (typename_p)
17782 tree ambiguous_decls;
17783 /* If we already know that this lookup is ambiguous, then
17784 we've already issued an error message; there's no reason
17788 cp_parser_simulate_error (parser);
17789 return error_mark_node;
17791 /* If the next token is a `::', then the name must be a type
17794 [basic.lookup.qual]
17796 During the lookup for a name preceding the :: scope
17797 resolution operator, object, function, and enumerator
17798 names are ignored. */
17799 if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
17800 tag_type = typename_type;
17801 /* Look up the name. */
17802 decl = cp_parser_lookup_name (parser, identifier,
17804 /*is_template=*/false,
17805 /*is_namespace=*/false,
17806 check_dependency_p,
17808 identifier_token->location);
17809 if (ambiguous_decls)
17811 if (cp_parser_parsing_tentatively (parser))
17812 cp_parser_simulate_error (parser);
17813 return error_mark_node;
17819 /* Try a template-id. */
17820 decl = cp_parser_template_id (parser, template_keyword_p,
17821 check_dependency_p,
17823 if (decl == error_mark_node)
17824 return error_mark_node;
17827 decl = cp_parser_maybe_treat_template_as_class (decl, class_head_p);
17829 /* If this is a typename, create a TYPENAME_TYPE. */
17830 if (typename_p && decl != error_mark_node)
17832 decl = make_typename_type (scope, decl, typename_type,
17833 /*complain=*/tf_error);
17834 if (decl != error_mark_node)
17835 decl = TYPE_NAME (decl);
17838 /* Check to see that it is really the name of a class. */
17839 if (TREE_CODE (decl) == TEMPLATE_ID_EXPR
17840 && TREE_CODE (TREE_OPERAND (decl, 0)) == IDENTIFIER_NODE
17841 && cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
17842 /* Situations like this:
17844 template <typename T> struct A {
17845 typename T::template X<int>::I i;
17848 are problematic. Is `T::template X<int>' a class-name? The
17849 standard does not seem to be definitive, but there is no other
17850 valid interpretation of the following `::'. Therefore, those
17851 names are considered class-names. */
17853 decl = make_typename_type (scope, decl, tag_type, tf_error);
17854 if (decl != error_mark_node)
17855 decl = TYPE_NAME (decl);
17857 else if (TREE_CODE (decl) != TYPE_DECL
17858 || TREE_TYPE (decl) == error_mark_node
17859 || !MAYBE_CLASS_TYPE_P (TREE_TYPE (decl))
17860 /* In Objective-C 2.0, a classname followed by '.' starts a
17861 dot-syntax expression, and it's not a type-name. */
17862 || (c_dialect_objc ()
17863 && cp_lexer_peek_token (parser->lexer)->type == CPP_DOT
17864 && objc_is_class_name (decl)))
17865 decl = error_mark_node;
17867 if (decl == error_mark_node)
17868 cp_parser_error (parser, "expected class-name");
17869 else if (identifier && !parser->scope)
17870 maybe_note_name_used_in_class (identifier, decl);
17875 /* Parse a class-specifier.
17878 class-head { member-specification [opt] }
17880 Returns the TREE_TYPE representing the class. */
17883 cp_parser_class_specifier_1 (cp_parser* parser)
17886 tree attributes = NULL_TREE;
17887 bool nested_name_specifier_p;
17888 unsigned saved_num_template_parameter_lists;
17889 bool saved_in_function_body;
17890 unsigned char in_statement;
17891 bool in_switch_statement_p;
17892 bool saved_in_unbraced_linkage_specification_p;
17893 tree old_scope = NULL_TREE;
17894 tree scope = NULL_TREE;
17896 cp_token *closing_brace;
17898 push_deferring_access_checks (dk_no_deferred);
17900 /* Parse the class-head. */
17901 type = cp_parser_class_head (parser,
17902 &nested_name_specifier_p,
17905 /* If the class-head was a semantic disaster, skip the entire body
17909 cp_parser_skip_to_end_of_block_or_statement (parser);
17910 pop_deferring_access_checks ();
17911 return error_mark_node;
17914 /* Look for the `{'. */
17915 if (!cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE))
17917 pop_deferring_access_checks ();
17918 return error_mark_node;
17921 /* Process the base classes. If they're invalid, skip the
17922 entire class body. */
17923 if (!xref_basetypes (type, bases))
17925 /* Consuming the closing brace yields better error messages
17927 if (cp_parser_skip_to_closing_brace (parser))
17928 cp_lexer_consume_token (parser->lexer);
17929 pop_deferring_access_checks ();
17930 return error_mark_node;
17933 /* Issue an error message if type-definitions are forbidden here. */
17934 cp_parser_check_type_definition (parser);
17935 /* Remember that we are defining one more class. */
17936 ++parser->num_classes_being_defined;
17937 /* Inside the class, surrounding template-parameter-lists do not
17939 saved_num_template_parameter_lists
17940 = parser->num_template_parameter_lists;
17941 parser->num_template_parameter_lists = 0;
17942 /* We are not in a function body. */
17943 saved_in_function_body = parser->in_function_body;
17944 parser->in_function_body = false;
17945 /* Or in a loop. */
17946 in_statement = parser->in_statement;
17947 parser->in_statement = 0;
17948 /* Or in a switch. */
17949 in_switch_statement_p = parser->in_switch_statement_p;
17950 parser->in_switch_statement_p = false;
17951 /* We are not immediately inside an extern "lang" block. */
17952 saved_in_unbraced_linkage_specification_p
17953 = parser->in_unbraced_linkage_specification_p;
17954 parser->in_unbraced_linkage_specification_p = false;
17956 /* Start the class. */
17957 if (nested_name_specifier_p)
17959 scope = CP_DECL_CONTEXT (TYPE_MAIN_DECL (type));
17960 old_scope = push_inner_scope (scope);
17962 type = begin_class_definition (type, attributes);
17964 if (type == error_mark_node)
17965 /* If the type is erroneous, skip the entire body of the class. */
17966 cp_parser_skip_to_closing_brace (parser);
17968 /* Parse the member-specification. */
17969 cp_parser_member_specification_opt (parser);
17971 /* Look for the trailing `}'. */
17972 closing_brace = cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
17973 /* Look for trailing attributes to apply to this class. */
17974 if (cp_parser_allow_gnu_extensions_p (parser))
17975 attributes = cp_parser_attributes_opt (parser);
17976 if (type != error_mark_node)
17977 type = finish_struct (type, attributes);
17978 if (nested_name_specifier_p)
17979 pop_inner_scope (old_scope, scope);
17981 /* We've finished a type definition. Check for the common syntax
17982 error of forgetting a semicolon after the definition. We need to
17983 be careful, as we can't just check for not-a-semicolon and be done
17984 with it; the user might have typed:
17986 class X { } c = ...;
17987 class X { } *p = ...;
17989 and so forth. Instead, enumerate all the possible tokens that
17990 might follow this production; if we don't see one of them, then
17991 complain and silently insert the semicolon. */
17993 cp_token *token = cp_lexer_peek_token (parser->lexer);
17994 bool want_semicolon = true;
17996 switch (token->type)
17999 case CPP_SEMICOLON:
18002 case CPP_OPEN_PAREN:
18003 case CPP_CLOSE_PAREN:
18005 want_semicolon = false;
18008 /* While it's legal for type qualifiers and storage class
18009 specifiers to follow type definitions in the grammar, only
18010 compiler testsuites contain code like that. Assume that if
18011 we see such code, then what we're really seeing is a case
18015 const <type> var = ...;
18020 static <type> func (...) ...
18022 i.e. the qualifier or specifier applies to the next
18023 declaration. To do so, however, we need to look ahead one
18024 more token to see if *that* token is a type specifier.
18026 This code could be improved to handle:
18029 static const <type> var = ...; */
18031 if (keyword_is_decl_specifier (token->keyword))
18033 cp_token *lookahead = cp_lexer_peek_nth_token (parser->lexer, 2);
18035 /* Handling user-defined types here would be nice, but very
18038 = (lookahead->type == CPP_KEYWORD
18039 && keyword_begins_type_specifier (lookahead->keyword));
18046 /* If we don't have a type, then something is very wrong and we
18047 shouldn't try to do anything clever. Likewise for not seeing the
18049 if (closing_brace && TYPE_P (type) && want_semicolon)
18051 cp_token_position prev
18052 = cp_lexer_previous_token_position (parser->lexer);
18053 cp_token *prev_token = cp_lexer_token_at (parser->lexer, prev);
18054 location_t loc = prev_token->location;
18056 if (CLASSTYPE_DECLARED_CLASS (type))
18057 error_at (loc, "expected %<;%> after class definition");
18058 else if (TREE_CODE (type) == RECORD_TYPE)
18059 error_at (loc, "expected %<;%> after struct definition");
18060 else if (TREE_CODE (type) == UNION_TYPE)
18061 error_at (loc, "expected %<;%> after union definition");
18063 gcc_unreachable ();
18065 /* Unget one token and smash it to look as though we encountered
18066 a semicolon in the input stream. */
18067 cp_lexer_set_token_position (parser->lexer, prev);
18068 token = cp_lexer_peek_token (parser->lexer);
18069 token->type = CPP_SEMICOLON;
18070 token->keyword = RID_MAX;
18074 /* If this class is not itself within the scope of another class,
18075 then we need to parse the bodies of all of the queued function
18076 definitions. Note that the queued functions defined in a class
18077 are not always processed immediately following the
18078 class-specifier for that class. Consider:
18081 struct B { void f() { sizeof (A); } };
18084 If `f' were processed before the processing of `A' were
18085 completed, there would be no way to compute the size of `A'.
18086 Note that the nesting we are interested in here is lexical --
18087 not the semantic nesting given by TYPE_CONTEXT. In particular,
18090 struct A { struct B; };
18091 struct A::B { void f() { } };
18093 there is no need to delay the parsing of `A::B::f'. */
18094 if (--parser->num_classes_being_defined == 0)
18097 tree class_type = NULL_TREE;
18098 tree pushed_scope = NULL_TREE;
18100 cp_default_arg_entry *e;
18101 tree save_ccp, save_ccr;
18103 /* In a first pass, parse default arguments to the functions.
18104 Then, in a second pass, parse the bodies of the functions.
18105 This two-phased approach handles cases like:
18113 FOR_EACH_VEC_ELT (cp_default_arg_entry, unparsed_funs_with_default_args,
18117 /* If there are default arguments that have not yet been processed,
18118 take care of them now. */
18119 if (class_type != e->class_type)
18122 pop_scope (pushed_scope);
18123 class_type = e->class_type;
18124 pushed_scope = push_scope (class_type);
18126 /* Make sure that any template parameters are in scope. */
18127 maybe_begin_member_template_processing (decl);
18128 /* Parse the default argument expressions. */
18129 cp_parser_late_parsing_default_args (parser, decl);
18130 /* Remove any template parameters from the symbol table. */
18131 maybe_end_member_template_processing ();
18133 VEC_truncate (cp_default_arg_entry, unparsed_funs_with_default_args, 0);
18134 /* Now parse any NSDMIs. */
18135 save_ccp = current_class_ptr;
18136 save_ccr = current_class_ref;
18137 FOR_EACH_VEC_ELT (tree, unparsed_nsdmis, ix, decl)
18139 if (class_type != DECL_CONTEXT (decl))
18142 pop_scope (pushed_scope);
18143 class_type = DECL_CONTEXT (decl);
18144 pushed_scope = push_scope (class_type);
18146 inject_this_parameter (class_type, TYPE_UNQUALIFIED);
18147 cp_parser_late_parsing_nsdmi (parser, decl);
18149 VEC_truncate (tree, unparsed_nsdmis, 0);
18150 current_class_ptr = save_ccp;
18151 current_class_ref = save_ccr;
18153 pop_scope (pushed_scope);
18154 /* Now parse the body of the functions. */
18155 FOR_EACH_VEC_ELT (tree, unparsed_funs_with_definitions, ix, decl)
18156 cp_parser_late_parsing_for_member (parser, decl);
18157 VEC_truncate (tree, unparsed_funs_with_definitions, 0);
18160 /* Put back any saved access checks. */
18161 pop_deferring_access_checks ();
18163 /* Restore saved state. */
18164 parser->in_switch_statement_p = in_switch_statement_p;
18165 parser->in_statement = in_statement;
18166 parser->in_function_body = saved_in_function_body;
18167 parser->num_template_parameter_lists
18168 = saved_num_template_parameter_lists;
18169 parser->in_unbraced_linkage_specification_p
18170 = saved_in_unbraced_linkage_specification_p;
18176 cp_parser_class_specifier (cp_parser* parser)
18179 timevar_push (TV_PARSE_STRUCT);
18180 ret = cp_parser_class_specifier_1 (parser);
18181 timevar_pop (TV_PARSE_STRUCT);
18185 /* Parse a class-head.
18188 class-key identifier [opt] base-clause [opt]
18189 class-key nested-name-specifier identifier class-virt-specifier [opt] base-clause [opt]
18190 class-key nested-name-specifier [opt] template-id
18193 class-virt-specifier:
18197 class-key attributes identifier [opt] base-clause [opt]
18198 class-key attributes nested-name-specifier identifier base-clause [opt]
18199 class-key attributes nested-name-specifier [opt] template-id
18202 Upon return BASES is initialized to the list of base classes (or
18203 NULL, if there are none) in the same form returned by
18204 cp_parser_base_clause.
18206 Returns the TYPE of the indicated class. Sets
18207 *NESTED_NAME_SPECIFIER_P to TRUE iff one of the productions
18208 involving a nested-name-specifier was used, and FALSE otherwise.
18210 Returns error_mark_node if this is not a class-head.
18212 Returns NULL_TREE if the class-head is syntactically valid, but
18213 semantically invalid in a way that means we should skip the entire
18214 body of the class. */
18217 cp_parser_class_head (cp_parser* parser,
18218 bool* nested_name_specifier_p,
18219 tree *attributes_p,
18222 tree nested_name_specifier;
18223 enum tag_types class_key;
18224 tree id = NULL_TREE;
18225 tree type = NULL_TREE;
18227 cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
18228 bool template_id_p = false;
18229 bool qualified_p = false;
18230 bool invalid_nested_name_p = false;
18231 bool invalid_explicit_specialization_p = false;
18232 bool saved_colon_corrects_to_scope_p = parser->colon_corrects_to_scope_p;
18233 tree pushed_scope = NULL_TREE;
18234 unsigned num_templates;
18235 cp_token *type_start_token = NULL, *nested_name_specifier_token_start = NULL;
18236 /* Assume no nested-name-specifier will be present. */
18237 *nested_name_specifier_p = false;
18238 /* Assume no template parameter lists will be used in defining the
18241 parser->colon_corrects_to_scope_p = false;
18243 *bases = NULL_TREE;
18245 /* Look for the class-key. */
18246 class_key = cp_parser_class_key (parser);
18247 if (class_key == none_type)
18248 return error_mark_node;
18250 /* Parse the attributes. */
18251 attributes = cp_parser_attributes_opt (parser);
18253 /* If the next token is `::', that is invalid -- but sometimes
18254 people do try to write:
18258 Handle this gracefully by accepting the extra qualifier, and then
18259 issuing an error about it later if this really is a
18260 class-head. If it turns out just to be an elaborated type
18261 specifier, remain silent. */
18262 if (cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false))
18263 qualified_p = true;
18265 push_deferring_access_checks (dk_no_check);
18267 /* Determine the name of the class. Begin by looking for an
18268 optional nested-name-specifier. */
18269 nested_name_specifier_token_start = cp_lexer_peek_token (parser->lexer);
18270 nested_name_specifier
18271 = cp_parser_nested_name_specifier_opt (parser,
18272 /*typename_keyword_p=*/false,
18273 /*check_dependency_p=*/false,
18275 /*is_declaration=*/false);
18276 /* If there was a nested-name-specifier, then there *must* be an
18278 if (nested_name_specifier)
18280 type_start_token = cp_lexer_peek_token (parser->lexer);
18281 /* Although the grammar says `identifier', it really means
18282 `class-name' or `template-name'. You are only allowed to
18283 define a class that has already been declared with this
18286 The proposed resolution for Core Issue 180 says that wherever
18287 you see `class T::X' you should treat `X' as a type-name.
18289 It is OK to define an inaccessible class; for example:
18291 class A { class B; };
18294 We do not know if we will see a class-name, or a
18295 template-name. We look for a class-name first, in case the
18296 class-name is a template-id; if we looked for the
18297 template-name first we would stop after the template-name. */
18298 cp_parser_parse_tentatively (parser);
18299 type = cp_parser_class_name (parser,
18300 /*typename_keyword_p=*/false,
18301 /*template_keyword_p=*/false,
18303 /*check_dependency_p=*/false,
18304 /*class_head_p=*/true,
18305 /*is_declaration=*/false);
18306 /* If that didn't work, ignore the nested-name-specifier. */
18307 if (!cp_parser_parse_definitely (parser))
18309 invalid_nested_name_p = true;
18310 type_start_token = cp_lexer_peek_token (parser->lexer);
18311 id = cp_parser_identifier (parser);
18312 if (id == error_mark_node)
18315 /* If we could not find a corresponding TYPE, treat this
18316 declaration like an unqualified declaration. */
18317 if (type == error_mark_node)
18318 nested_name_specifier = NULL_TREE;
18319 /* Otherwise, count the number of templates used in TYPE and its
18320 containing scopes. */
18325 for (scope = TREE_TYPE (type);
18326 scope && TREE_CODE (scope) != NAMESPACE_DECL;
18327 scope = (TYPE_P (scope)
18328 ? TYPE_CONTEXT (scope)
18329 : DECL_CONTEXT (scope)))
18331 && CLASS_TYPE_P (scope)
18332 && CLASSTYPE_TEMPLATE_INFO (scope)
18333 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (scope))
18334 && !CLASSTYPE_TEMPLATE_SPECIALIZATION (scope))
18338 /* Otherwise, the identifier is optional. */
18341 /* We don't know whether what comes next is a template-id,
18342 an identifier, or nothing at all. */
18343 cp_parser_parse_tentatively (parser);
18344 /* Check for a template-id. */
18345 type_start_token = cp_lexer_peek_token (parser->lexer);
18346 id = cp_parser_template_id (parser,
18347 /*template_keyword_p=*/false,
18348 /*check_dependency_p=*/true,
18349 /*is_declaration=*/true);
18350 /* If that didn't work, it could still be an identifier. */
18351 if (!cp_parser_parse_definitely (parser))
18353 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
18355 type_start_token = cp_lexer_peek_token (parser->lexer);
18356 id = cp_parser_identifier (parser);
18363 template_id_p = true;
18368 pop_deferring_access_checks ();
18372 cp_parser_check_for_invalid_template_id (parser, id,
18373 type_start_token->location);
18375 virt_specifiers = cp_parser_virt_specifier_seq_opt (parser);
18377 /* If it's not a `:' or a `{' then we can't really be looking at a
18378 class-head, since a class-head only appears as part of a
18379 class-specifier. We have to detect this situation before calling
18380 xref_tag, since that has irreversible side-effects. */
18381 if (!cp_parser_next_token_starts_class_definition_p (parser))
18383 cp_parser_error (parser, "expected %<{%> or %<:%>");
18384 type = error_mark_node;
18388 /* At this point, we're going ahead with the class-specifier, even
18389 if some other problem occurs. */
18390 cp_parser_commit_to_tentative_parse (parser);
18391 if (virt_specifiers & VIRT_SPEC_OVERRIDE)
18393 cp_parser_error (parser,
18394 "cannot specify %<override%> for a class");
18395 type = error_mark_node;
18398 /* Issue the error about the overly-qualified name now. */
18401 cp_parser_error (parser,
18402 "global qualification of class name is invalid");
18403 type = error_mark_node;
18406 else if (invalid_nested_name_p)
18408 cp_parser_error (parser,
18409 "qualified name does not name a class");
18410 type = error_mark_node;
18413 else if (nested_name_specifier)
18417 /* Reject typedef-names in class heads. */
18418 if (!DECL_IMPLICIT_TYPEDEF_P (type))
18420 error_at (type_start_token->location,
18421 "invalid class name in declaration of %qD",
18427 /* Figure out in what scope the declaration is being placed. */
18428 scope = current_scope ();
18429 /* If that scope does not contain the scope in which the
18430 class was originally declared, the program is invalid. */
18431 if (scope && !is_ancestor (scope, nested_name_specifier))
18433 if (at_namespace_scope_p ())
18434 error_at (type_start_token->location,
18435 "declaration of %qD in namespace %qD which does not "
18437 type, scope, nested_name_specifier);
18439 error_at (type_start_token->location,
18440 "declaration of %qD in %qD which does not enclose %qD",
18441 type, scope, nested_name_specifier);
18447 A declarator-id shall not be qualified except for the
18448 definition of a ... nested class outside of its class
18449 ... [or] the definition or explicit instantiation of a
18450 class member of a namespace outside of its namespace. */
18451 if (scope == nested_name_specifier)
18453 permerror (nested_name_specifier_token_start->location,
18454 "extra qualification not allowed");
18455 nested_name_specifier = NULL_TREE;
18459 /* An explicit-specialization must be preceded by "template <>". If
18460 it is not, try to recover gracefully. */
18461 if (at_namespace_scope_p ()
18462 && parser->num_template_parameter_lists == 0
18465 error_at (type_start_token->location,
18466 "an explicit specialization must be preceded by %<template <>%>");
18467 invalid_explicit_specialization_p = true;
18468 /* Take the same action that would have been taken by
18469 cp_parser_explicit_specialization. */
18470 ++parser->num_template_parameter_lists;
18471 begin_specialization ();
18473 /* There must be no "return" statements between this point and the
18474 end of this function; set "type "to the correct return value and
18475 use "goto done;" to return. */
18476 /* Make sure that the right number of template parameters were
18478 if (!cp_parser_check_template_parameters (parser, num_templates,
18479 type_start_token->location,
18480 /*declarator=*/NULL))
18482 /* If something went wrong, there is no point in even trying to
18483 process the class-definition. */
18488 /* Look up the type. */
18491 if (TREE_CODE (id) == TEMPLATE_ID_EXPR
18492 && (DECL_FUNCTION_TEMPLATE_P (TREE_OPERAND (id, 0))
18493 || TREE_CODE (TREE_OPERAND (id, 0)) == OVERLOAD))
18495 error_at (type_start_token->location,
18496 "function template %qD redeclared as a class template", id);
18497 type = error_mark_node;
18501 type = TREE_TYPE (id);
18502 type = maybe_process_partial_specialization (type);
18504 if (nested_name_specifier)
18505 pushed_scope = push_scope (nested_name_specifier);
18507 else if (nested_name_specifier)
18513 template <typename T> struct S { struct T };
18514 template <typename T> struct S<T>::T { };
18516 we will get a TYPENAME_TYPE when processing the definition of
18517 `S::T'. We need to resolve it to the actual type before we
18518 try to define it. */
18519 if (TREE_CODE (TREE_TYPE (type)) == TYPENAME_TYPE)
18521 class_type = resolve_typename_type (TREE_TYPE (type),
18522 /*only_current_p=*/false);
18523 if (TREE_CODE (class_type) != TYPENAME_TYPE)
18524 type = TYPE_NAME (class_type);
18527 cp_parser_error (parser, "could not resolve typename type");
18528 type = error_mark_node;
18532 if (maybe_process_partial_specialization (TREE_TYPE (type))
18533 == error_mark_node)
18539 class_type = current_class_type;
18540 /* Enter the scope indicated by the nested-name-specifier. */
18541 pushed_scope = push_scope (nested_name_specifier);
18542 /* Get the canonical version of this type. */
18543 type = TYPE_MAIN_DECL (TREE_TYPE (type));
18544 if (PROCESSING_REAL_TEMPLATE_DECL_P ()
18545 && !CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_TYPE (type)))
18547 type = push_template_decl (type);
18548 if (type == error_mark_node)
18555 type = TREE_TYPE (type);
18556 *nested_name_specifier_p = true;
18558 else /* The name is not a nested name. */
18560 /* If the class was unnamed, create a dummy name. */
18562 id = make_anon_name ();
18563 type = xref_tag (class_key, id, /*tag_scope=*/ts_current,
18564 parser->num_template_parameter_lists);
18567 /* Indicate whether this class was declared as a `class' or as a
18569 if (TREE_CODE (type) == RECORD_TYPE)
18570 CLASSTYPE_DECLARED_CLASS (type) = (class_key == class_type);
18571 cp_parser_check_class_key (class_key, type);
18573 /* If this type was already complete, and we see another definition,
18574 that's an error. */
18575 if (type != error_mark_node && COMPLETE_TYPE_P (type))
18577 error_at (type_start_token->location, "redefinition of %q#T",
18579 error_at (type_start_token->location, "previous definition of %q+#T",
18584 else if (type == error_mark_node)
18587 /* We will have entered the scope containing the class; the names of
18588 base classes should be looked up in that context. For example:
18590 struct A { struct B {}; struct C; };
18591 struct A::C : B {};
18595 /* Get the list of base-classes, if there is one. */
18596 if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
18597 *bases = cp_parser_base_clause (parser);
18600 /* Leave the scope given by the nested-name-specifier. We will
18601 enter the class scope itself while processing the members. */
18603 pop_scope (pushed_scope);
18605 if (invalid_explicit_specialization_p)
18607 end_specialization ();
18608 --parser->num_template_parameter_lists;
18612 DECL_SOURCE_LOCATION (TYPE_NAME (type)) = type_start_token->location;
18613 *attributes_p = attributes;
18614 if (type && (virt_specifiers & VIRT_SPEC_FINAL))
18615 CLASSTYPE_FINAL (type) = 1;
18617 parser->colon_corrects_to_scope_p = saved_colon_corrects_to_scope_p;
18621 /* Parse a class-key.
18628 Returns the kind of class-key specified, or none_type to indicate
18631 static enum tag_types
18632 cp_parser_class_key (cp_parser* parser)
18635 enum tag_types tag_type;
18637 /* Look for the class-key. */
18638 token = cp_parser_require (parser, CPP_KEYWORD, RT_CLASS_KEY);
18642 /* Check to see if the TOKEN is a class-key. */
18643 tag_type = cp_parser_token_is_class_key (token);
18645 cp_parser_error (parser, "expected class-key");
18649 /* Parse an (optional) member-specification.
18651 member-specification:
18652 member-declaration member-specification [opt]
18653 access-specifier : member-specification [opt] */
18656 cp_parser_member_specification_opt (cp_parser* parser)
18663 /* Peek at the next token. */
18664 token = cp_lexer_peek_token (parser->lexer);
18665 /* If it's a `}', or EOF then we've seen all the members. */
18666 if (token->type == CPP_CLOSE_BRACE
18667 || token->type == CPP_EOF
18668 || token->type == CPP_PRAGMA_EOL)
18671 /* See if this token is a keyword. */
18672 keyword = token->keyword;
18676 case RID_PROTECTED:
18678 /* Consume the access-specifier. */
18679 cp_lexer_consume_token (parser->lexer);
18680 /* Remember which access-specifier is active. */
18681 current_access_specifier = token->u.value;
18682 /* Look for the `:'. */
18683 cp_parser_require (parser, CPP_COLON, RT_COLON);
18687 /* Accept #pragmas at class scope. */
18688 if (token->type == CPP_PRAGMA)
18690 cp_parser_pragma (parser, pragma_external);
18694 /* Otherwise, the next construction must be a
18695 member-declaration. */
18696 cp_parser_member_declaration (parser);
18701 /* Parse a member-declaration.
18703 member-declaration:
18704 decl-specifier-seq [opt] member-declarator-list [opt] ;
18705 function-definition ; [opt]
18706 :: [opt] nested-name-specifier template [opt] unqualified-id ;
18708 template-declaration
18711 member-declarator-list:
18713 member-declarator-list , member-declarator
18716 declarator pure-specifier [opt]
18717 declarator constant-initializer [opt]
18718 identifier [opt] : constant-expression
18722 member-declaration:
18723 __extension__ member-declaration
18726 declarator attributes [opt] pure-specifier [opt]
18727 declarator attributes [opt] constant-initializer [opt]
18728 identifier [opt] attributes [opt] : constant-expression
18732 member-declaration:
18733 static_assert-declaration */
18736 cp_parser_member_declaration (cp_parser* parser)
18738 cp_decl_specifier_seq decl_specifiers;
18739 tree prefix_attributes;
18741 int declares_class_or_enum;
18743 cp_token *token = NULL;
18744 cp_token *decl_spec_token_start = NULL;
18745 cp_token *initializer_token_start = NULL;
18746 int saved_pedantic;
18747 bool saved_colon_corrects_to_scope_p = parser->colon_corrects_to_scope_p;
18749 /* Check for the `__extension__' keyword. */
18750 if (cp_parser_extension_opt (parser, &saved_pedantic))
18753 cp_parser_member_declaration (parser);
18754 /* Restore the old value of the PEDANTIC flag. */
18755 pedantic = saved_pedantic;
18760 /* Check for a template-declaration. */
18761 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
18763 /* An explicit specialization here is an error condition, and we
18764 expect the specialization handler to detect and report this. */
18765 if (cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_LESS
18766 && cp_lexer_peek_nth_token (parser->lexer, 3)->type == CPP_GREATER)
18767 cp_parser_explicit_specialization (parser);
18769 cp_parser_template_declaration (parser, /*member_p=*/true);
18774 /* Check for a using-declaration. */
18775 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_USING))
18777 if (cxx_dialect < cxx0x)
18779 /* Parse the using-declaration. */
18780 cp_parser_using_declaration (parser,
18781 /*access_declaration_p=*/false);
18787 cp_parser_parse_tentatively (parser);
18788 decl = cp_parser_alias_declaration (parser);
18789 if (cp_parser_parse_definitely (parser))
18790 finish_member_declaration (decl);
18792 cp_parser_using_declaration (parser,
18793 /*access_declaration_p=*/false);
18798 /* Check for @defs. */
18799 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_AT_DEFS))
18802 tree ivar_chains = cp_parser_objc_defs_expression (parser);
18803 ivar = ivar_chains;
18807 ivar = TREE_CHAIN (member);
18808 TREE_CHAIN (member) = NULL_TREE;
18809 finish_member_declaration (member);
18814 /* If the next token is `static_assert' we have a static assertion. */
18815 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_STATIC_ASSERT))
18817 cp_parser_static_assert (parser, /*member_p=*/true);
18821 parser->colon_corrects_to_scope_p = false;
18823 if (cp_parser_using_declaration (parser, /*access_declaration=*/true))
18826 /* Parse the decl-specifier-seq. */
18827 decl_spec_token_start = cp_lexer_peek_token (parser->lexer);
18828 cp_parser_decl_specifier_seq (parser,
18829 CP_PARSER_FLAGS_OPTIONAL,
18831 &declares_class_or_enum);
18832 prefix_attributes = decl_specifiers.attributes;
18833 decl_specifiers.attributes = NULL_TREE;
18834 /* Check for an invalid type-name. */
18835 if (!decl_specifiers.any_type_specifiers_p
18836 && cp_parser_parse_and_diagnose_invalid_type_name (parser))
18838 /* If there is no declarator, then the decl-specifier-seq should
18840 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
18842 /* If there was no decl-specifier-seq, and the next token is a
18843 `;', then we have something like:
18849 Each member-declaration shall declare at least one member
18850 name of the class. */
18851 if (!decl_specifiers.any_specifiers_p)
18853 cp_token *token = cp_lexer_peek_token (parser->lexer);
18854 if (!in_system_header_at (token->location))
18855 pedwarn (token->location, OPT_pedantic, "extra %<;%>");
18861 /* See if this declaration is a friend. */
18862 friend_p = cp_parser_friend_p (&decl_specifiers);
18863 /* If there were decl-specifiers, check to see if there was
18864 a class-declaration. */
18865 type = check_tag_decl (&decl_specifiers);
18866 /* Nested classes have already been added to the class, but
18867 a `friend' needs to be explicitly registered. */
18870 /* If the `friend' keyword was present, the friend must
18871 be introduced with a class-key. */
18872 if (!declares_class_or_enum && cxx_dialect < cxx0x)
18873 pedwarn (decl_spec_token_start->location, OPT_pedantic,
18874 "in C++03 a class-key must be used "
18875 "when declaring a friend");
18878 template <typename T> struct A {
18879 friend struct A<T>::B;
18882 A<T>::B will be represented by a TYPENAME_TYPE, and
18883 therefore not recognized by check_tag_decl. */
18886 type = decl_specifiers.type;
18887 if (type && TREE_CODE (type) == TYPE_DECL)
18888 type = TREE_TYPE (type);
18890 if (!type || !TYPE_P (type))
18891 error_at (decl_spec_token_start->location,
18892 "friend declaration does not name a class or "
18895 make_friend_class (current_class_type, type,
18896 /*complain=*/true);
18898 /* If there is no TYPE, an error message will already have
18900 else if (!type || type == error_mark_node)
18902 /* An anonymous aggregate has to be handled specially; such
18903 a declaration really declares a data member (with a
18904 particular type), as opposed to a nested class. */
18905 else if (ANON_AGGR_TYPE_P (type))
18907 /* Remove constructors and such from TYPE, now that we
18908 know it is an anonymous aggregate. */
18909 fixup_anonymous_aggr (type);
18910 /* And make the corresponding data member. */
18911 decl = build_decl (decl_spec_token_start->location,
18912 FIELD_DECL, NULL_TREE, type);
18913 /* Add it to the class. */
18914 finish_member_declaration (decl);
18917 cp_parser_check_access_in_redeclaration
18919 decl_spec_token_start->location);
18924 bool assume_semicolon = false;
18926 /* See if these declarations will be friends. */
18927 friend_p = cp_parser_friend_p (&decl_specifiers);
18929 /* Keep going until we hit the `;' at the end of the
18931 while (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
18933 tree attributes = NULL_TREE;
18934 tree first_attribute;
18936 /* Peek at the next token. */
18937 token = cp_lexer_peek_token (parser->lexer);
18939 /* Check for a bitfield declaration. */
18940 if (token->type == CPP_COLON
18941 || (token->type == CPP_NAME
18942 && cp_lexer_peek_nth_token (parser->lexer, 2)->type
18948 /* Get the name of the bitfield. Note that we cannot just
18949 check TOKEN here because it may have been invalidated by
18950 the call to cp_lexer_peek_nth_token above. */
18951 if (cp_lexer_peek_token (parser->lexer)->type != CPP_COLON)
18952 identifier = cp_parser_identifier (parser);
18954 identifier = NULL_TREE;
18956 /* Consume the `:' token. */
18957 cp_lexer_consume_token (parser->lexer);
18958 /* Get the width of the bitfield. */
18960 = cp_parser_constant_expression (parser,
18961 /*allow_non_constant=*/false,
18964 /* Look for attributes that apply to the bitfield. */
18965 attributes = cp_parser_attributes_opt (parser);
18966 /* Remember which attributes are prefix attributes and
18968 first_attribute = attributes;
18969 /* Combine the attributes. */
18970 attributes = chainon (prefix_attributes, attributes);
18972 /* Create the bitfield declaration. */
18973 decl = grokbitfield (identifier
18974 ? make_id_declarator (NULL_TREE,
18984 cp_declarator *declarator;
18986 tree asm_specification;
18987 int ctor_dtor_or_conv_p;
18989 /* Parse the declarator. */
18991 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
18992 &ctor_dtor_or_conv_p,
18993 /*parenthesized_p=*/NULL,
18994 /*member_p=*/true);
18996 /* If something went wrong parsing the declarator, make sure
18997 that we at least consume some tokens. */
18998 if (declarator == cp_error_declarator)
19000 /* Skip to the end of the statement. */
19001 cp_parser_skip_to_end_of_statement (parser);
19002 /* If the next token is not a semicolon, that is
19003 probably because we just skipped over the body of
19004 a function. So, we consume a semicolon if
19005 present, but do not issue an error message if it
19007 if (cp_lexer_next_token_is (parser->lexer,
19009 cp_lexer_consume_token (parser->lexer);
19013 if (declares_class_or_enum & 2)
19014 cp_parser_check_for_definition_in_return_type
19015 (declarator, decl_specifiers.type,
19016 decl_specifiers.type_location);
19018 /* Look for an asm-specification. */
19019 asm_specification = cp_parser_asm_specification_opt (parser);
19020 /* Look for attributes that apply to the declaration. */
19021 attributes = cp_parser_attributes_opt (parser);
19022 /* Remember which attributes are prefix attributes and
19024 first_attribute = attributes;
19025 /* Combine the attributes. */
19026 attributes = chainon (prefix_attributes, attributes);
19028 /* If it's an `=', then we have a constant-initializer or a
19029 pure-specifier. It is not correct to parse the
19030 initializer before registering the member declaration
19031 since the member declaration should be in scope while
19032 its initializer is processed. However, the rest of the
19033 front end does not yet provide an interface that allows
19034 us to handle this correctly. */
19035 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
19039 A pure-specifier shall be used only in the declaration of
19040 a virtual function.
19042 A member-declarator can contain a constant-initializer
19043 only if it declares a static member of integral or
19046 Therefore, if the DECLARATOR is for a function, we look
19047 for a pure-specifier; otherwise, we look for a
19048 constant-initializer. When we call `grokfield', it will
19049 perform more stringent semantics checks. */
19050 initializer_token_start = cp_lexer_peek_token (parser->lexer);
19051 if (function_declarator_p (declarator)
19052 || (decl_specifiers.type
19053 && TREE_CODE (decl_specifiers.type) == TYPE_DECL
19054 && (TREE_CODE (TREE_TYPE (decl_specifiers.type))
19055 == FUNCTION_TYPE)))
19056 initializer = cp_parser_pure_specifier (parser);
19057 else if (decl_specifiers.storage_class != sc_static)
19058 initializer = cp_parser_save_nsdmi (parser);
19059 else if (cxx_dialect >= cxx0x)
19062 /* Don't require a constant rvalue in C++11, since we
19063 might want a reference constant. We'll enforce
19064 constancy later. */
19065 cp_lexer_consume_token (parser->lexer);
19066 /* Parse the initializer. */
19067 initializer = cp_parser_initializer_clause (parser,
19071 /* Parse the initializer. */
19072 initializer = cp_parser_constant_initializer (parser);
19074 else if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE)
19075 && !function_declarator_p (declarator))
19078 if (decl_specifiers.storage_class != sc_static)
19079 initializer = cp_parser_save_nsdmi (parser);
19081 initializer = cp_parser_initializer (parser, &x, &x);
19083 /* Otherwise, there is no initializer. */
19085 initializer = NULL_TREE;
19087 /* See if we are probably looking at a function
19088 definition. We are certainly not looking at a
19089 member-declarator. Calling `grokfield' has
19090 side-effects, so we must not do it unless we are sure
19091 that we are looking at a member-declarator. */
19092 if (cp_parser_token_starts_function_definition_p
19093 (cp_lexer_peek_token (parser->lexer)))
19095 /* The grammar does not allow a pure-specifier to be
19096 used when a member function is defined. (It is
19097 possible that this fact is an oversight in the
19098 standard, since a pure function may be defined
19099 outside of the class-specifier. */
19101 error_at (initializer_token_start->location,
19102 "pure-specifier on function-definition");
19103 decl = cp_parser_save_member_function_body (parser,
19107 /* If the member was not a friend, declare it here. */
19109 finish_member_declaration (decl);
19110 /* Peek at the next token. */
19111 token = cp_lexer_peek_token (parser->lexer);
19112 /* If the next token is a semicolon, consume it. */
19113 if (token->type == CPP_SEMICOLON)
19114 cp_lexer_consume_token (parser->lexer);
19118 if (declarator->kind == cdk_function)
19119 declarator->id_loc = token->location;
19120 /* Create the declaration. */
19121 decl = grokfield (declarator, &decl_specifiers,
19122 initializer, /*init_const_expr_p=*/true,
19127 /* Reset PREFIX_ATTRIBUTES. */
19128 while (attributes && TREE_CHAIN (attributes) != first_attribute)
19129 attributes = TREE_CHAIN (attributes);
19131 TREE_CHAIN (attributes) = NULL_TREE;
19133 /* If there is any qualification still in effect, clear it
19134 now; we will be starting fresh with the next declarator. */
19135 parser->scope = NULL_TREE;
19136 parser->qualifying_scope = NULL_TREE;
19137 parser->object_scope = NULL_TREE;
19138 /* If it's a `,', then there are more declarators. */
19139 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
19140 cp_lexer_consume_token (parser->lexer);
19141 /* If the next token isn't a `;', then we have a parse error. */
19142 else if (cp_lexer_next_token_is_not (parser->lexer,
19145 /* The next token might be a ways away from where the
19146 actual semicolon is missing. Find the previous token
19147 and use that for our error position. */
19148 cp_token *token = cp_lexer_previous_token (parser->lexer);
19149 error_at (token->location,
19150 "expected %<;%> at end of member declaration");
19152 /* Assume that the user meant to provide a semicolon. If
19153 we were to cp_parser_skip_to_end_of_statement, we might
19154 skip to a semicolon inside a member function definition
19155 and issue nonsensical error messages. */
19156 assume_semicolon = true;
19161 /* Add DECL to the list of members. */
19163 finish_member_declaration (decl);
19165 if (TREE_CODE (decl) == FUNCTION_DECL)
19166 cp_parser_save_default_args (parser, decl);
19167 else if (TREE_CODE (decl) == FIELD_DECL
19168 && !DECL_C_BIT_FIELD (decl)
19169 && DECL_INITIAL (decl))
19170 /* Add DECL to the queue of NSDMI to be parsed later. */
19171 VEC_safe_push (tree, gc, unparsed_nsdmis, decl);
19174 if (assume_semicolon)
19179 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
19181 parser->colon_corrects_to_scope_p = saved_colon_corrects_to_scope_p;
19184 /* Parse a pure-specifier.
19189 Returns INTEGER_ZERO_NODE if a pure specifier is found.
19190 Otherwise, ERROR_MARK_NODE is returned. */
19193 cp_parser_pure_specifier (cp_parser* parser)
19197 /* Look for the `=' token. */
19198 if (!cp_parser_require (parser, CPP_EQ, RT_EQ))
19199 return error_mark_node;
19200 /* Look for the `0' token. */
19201 token = cp_lexer_peek_token (parser->lexer);
19203 if (token->type == CPP_EOF
19204 || token->type == CPP_PRAGMA_EOL)
19205 return error_mark_node;
19207 cp_lexer_consume_token (parser->lexer);
19209 /* Accept = default or = delete in c++0x mode. */
19210 if (token->keyword == RID_DEFAULT
19211 || token->keyword == RID_DELETE)
19213 maybe_warn_cpp0x (CPP0X_DEFAULTED_DELETED);
19214 return token->u.value;
19217 /* c_lex_with_flags marks a single digit '0' with PURE_ZERO. */
19218 if (token->type != CPP_NUMBER || !(token->flags & PURE_ZERO))
19220 cp_parser_error (parser,
19221 "invalid pure specifier (only %<= 0%> is allowed)");
19222 cp_parser_skip_to_end_of_statement (parser);
19223 return error_mark_node;
19225 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
19227 error_at (token->location, "templates may not be %<virtual%>");
19228 return error_mark_node;
19231 return integer_zero_node;
19234 /* Parse a constant-initializer.
19236 constant-initializer:
19237 = constant-expression
19239 Returns a representation of the constant-expression. */
19242 cp_parser_constant_initializer (cp_parser* parser)
19244 /* Look for the `=' token. */
19245 if (!cp_parser_require (parser, CPP_EQ, RT_EQ))
19246 return error_mark_node;
19248 /* It is invalid to write:
19250 struct S { static const int i = { 7 }; };
19253 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
19255 cp_parser_error (parser,
19256 "a brace-enclosed initializer is not allowed here");
19257 /* Consume the opening brace. */
19258 cp_lexer_consume_token (parser->lexer);
19259 /* Skip the initializer. */
19260 cp_parser_skip_to_closing_brace (parser);
19261 /* Look for the trailing `}'. */
19262 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
19264 return error_mark_node;
19267 return cp_parser_constant_expression (parser,
19268 /*allow_non_constant=*/false,
19272 /* Derived classes [gram.class.derived] */
19274 /* Parse a base-clause.
19277 : base-specifier-list
19279 base-specifier-list:
19280 base-specifier ... [opt]
19281 base-specifier-list , base-specifier ... [opt]
19283 Returns a TREE_LIST representing the base-classes, in the order in
19284 which they were declared. The representation of each node is as
19285 described by cp_parser_base_specifier.
19287 In the case that no bases are specified, this function will return
19288 NULL_TREE, not ERROR_MARK_NODE. */
19291 cp_parser_base_clause (cp_parser* parser)
19293 tree bases = NULL_TREE;
19295 /* Look for the `:' that begins the list. */
19296 cp_parser_require (parser, CPP_COLON, RT_COLON);
19298 /* Scan the base-specifier-list. */
19303 bool pack_expansion_p = false;
19305 /* Look for the base-specifier. */
19306 base = cp_parser_base_specifier (parser);
19307 /* Look for the (optional) ellipsis. */
19308 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
19310 /* Consume the `...'. */
19311 cp_lexer_consume_token (parser->lexer);
19313 pack_expansion_p = true;
19316 /* Add BASE to the front of the list. */
19317 if (base && base != error_mark_node)
19319 if (pack_expansion_p)
19320 /* Make this a pack expansion type. */
19321 TREE_VALUE (base) = make_pack_expansion (TREE_VALUE (base));
19323 if (!check_for_bare_parameter_packs (TREE_VALUE (base)))
19325 TREE_CHAIN (base) = bases;
19329 /* Peek at the next token. */
19330 token = cp_lexer_peek_token (parser->lexer);
19331 /* If it's not a comma, then the list is complete. */
19332 if (token->type != CPP_COMMA)
19334 /* Consume the `,'. */
19335 cp_lexer_consume_token (parser->lexer);
19338 /* PARSER->SCOPE may still be non-NULL at this point, if the last
19339 base class had a qualified name. However, the next name that
19340 appears is certainly not qualified. */
19341 parser->scope = NULL_TREE;
19342 parser->qualifying_scope = NULL_TREE;
19343 parser->object_scope = NULL_TREE;
19345 return nreverse (bases);
19348 /* Parse a base-specifier.
19351 :: [opt] nested-name-specifier [opt] class-name
19352 virtual access-specifier [opt] :: [opt] nested-name-specifier
19354 access-specifier virtual [opt] :: [opt] nested-name-specifier
19357 Returns a TREE_LIST. The TREE_PURPOSE will be one of
19358 ACCESS_{DEFAULT,PUBLIC,PROTECTED,PRIVATE}_[VIRTUAL]_NODE to
19359 indicate the specifiers provided. The TREE_VALUE will be a TYPE
19360 (or the ERROR_MARK_NODE) indicating the type that was specified. */
19363 cp_parser_base_specifier (cp_parser* parser)
19367 bool virtual_p = false;
19368 bool duplicate_virtual_error_issued_p = false;
19369 bool duplicate_access_error_issued_p = false;
19370 bool class_scope_p, template_p;
19371 tree access = access_default_node;
19374 /* Process the optional `virtual' and `access-specifier'. */
19377 /* Peek at the next token. */
19378 token = cp_lexer_peek_token (parser->lexer);
19379 /* Process `virtual'. */
19380 switch (token->keyword)
19383 /* If `virtual' appears more than once, issue an error. */
19384 if (virtual_p && !duplicate_virtual_error_issued_p)
19386 cp_parser_error (parser,
19387 "%<virtual%> specified more than once in base-specified");
19388 duplicate_virtual_error_issued_p = true;
19393 /* Consume the `virtual' token. */
19394 cp_lexer_consume_token (parser->lexer);
19399 case RID_PROTECTED:
19401 /* If more than one access specifier appears, issue an
19403 if (access != access_default_node
19404 && !duplicate_access_error_issued_p)
19406 cp_parser_error (parser,
19407 "more than one access specifier in base-specified");
19408 duplicate_access_error_issued_p = true;
19411 access = ridpointers[(int) token->keyword];
19413 /* Consume the access-specifier. */
19414 cp_lexer_consume_token (parser->lexer);
19423 /* It is not uncommon to see programs mechanically, erroneously, use
19424 the 'typename' keyword to denote (dependent) qualified types
19425 as base classes. */
19426 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TYPENAME))
19428 token = cp_lexer_peek_token (parser->lexer);
19429 if (!processing_template_decl)
19430 error_at (token->location,
19431 "keyword %<typename%> not allowed outside of templates");
19433 error_at (token->location,
19434 "keyword %<typename%> not allowed in this context "
19435 "(the base class is implicitly a type)");
19436 cp_lexer_consume_token (parser->lexer);
19439 /* Look for the optional `::' operator. */
19440 cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false);
19441 /* Look for the nested-name-specifier. The simplest way to
19446 The keyword `typename' is not permitted in a base-specifier or
19447 mem-initializer; in these contexts a qualified name that
19448 depends on a template-parameter is implicitly assumed to be a
19451 is to pretend that we have seen the `typename' keyword at this
19453 cp_parser_nested_name_specifier_opt (parser,
19454 /*typename_keyword_p=*/true,
19455 /*check_dependency_p=*/true,
19457 /*is_declaration=*/true);
19458 /* If the base class is given by a qualified name, assume that names
19459 we see are type names or templates, as appropriate. */
19460 class_scope_p = (parser->scope && TYPE_P (parser->scope));
19461 template_p = class_scope_p && cp_parser_optional_template_keyword (parser);
19464 && cp_lexer_next_token_is_decltype (parser->lexer))
19465 /* DR 950 allows decltype as a base-specifier. */
19466 type = cp_parser_decltype (parser);
19469 /* Otherwise, look for the class-name. */
19470 type = cp_parser_class_name (parser,
19474 /*check_dependency_p=*/true,
19475 /*class_head_p=*/false,
19476 /*is_declaration=*/true);
19477 type = TREE_TYPE (type);
19480 if (type == error_mark_node)
19481 return error_mark_node;
19483 return finish_base_specifier (type, access, virtual_p);
19486 /* Exception handling [gram.exception] */
19488 /* Parse an (optional) noexcept-specification.
19490 noexcept-specification:
19491 noexcept ( constant-expression ) [opt]
19493 If no noexcept-specification is present, returns NULL_TREE.
19494 Otherwise, if REQUIRE_CONSTEXPR is false, then either parse and return any
19495 expression if parentheses follow noexcept, or return BOOLEAN_TRUE_NODE if
19496 there are no parentheses. CONSUMED_EXPR will be set accordingly.
19497 Otherwise, returns a noexcept specification unless RETURN_COND is true,
19498 in which case a boolean condition is returned instead. */
19501 cp_parser_noexcept_specification_opt (cp_parser* parser,
19502 bool require_constexpr,
19503 bool* consumed_expr,
19507 const char *saved_message;
19509 /* Peek at the next token. */
19510 token = cp_lexer_peek_token (parser->lexer);
19512 /* Is it a noexcept-specification? */
19513 if (cp_parser_is_keyword (token, RID_NOEXCEPT))
19516 cp_lexer_consume_token (parser->lexer);
19518 if (cp_lexer_peek_token (parser->lexer)->type == CPP_OPEN_PAREN)
19520 cp_lexer_consume_token (parser->lexer);
19522 if (require_constexpr)
19524 /* Types may not be defined in an exception-specification. */
19525 saved_message = parser->type_definition_forbidden_message;
19526 parser->type_definition_forbidden_message
19527 = G_("types may not be defined in an exception-specification");
19529 expr = cp_parser_constant_expression (parser, false, NULL);
19531 /* Restore the saved message. */
19532 parser->type_definition_forbidden_message = saved_message;
19536 expr = cp_parser_expression (parser, false, NULL);
19537 *consumed_expr = true;
19540 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
19544 expr = boolean_true_node;
19545 if (!require_constexpr)
19546 *consumed_expr = false;
19549 /* We cannot build a noexcept-spec right away because this will check
19550 that expr is a constexpr. */
19552 return build_noexcept_spec (expr, tf_warning_or_error);
19560 /* Parse an (optional) exception-specification.
19562 exception-specification:
19563 throw ( type-id-list [opt] )
19565 Returns a TREE_LIST representing the exception-specification. The
19566 TREE_VALUE of each node is a type. */
19569 cp_parser_exception_specification_opt (cp_parser* parser)
19573 const char *saved_message;
19575 /* Peek at the next token. */
19576 token = cp_lexer_peek_token (parser->lexer);
19578 /* Is it a noexcept-specification? */
19579 type_id_list = cp_parser_noexcept_specification_opt(parser, true, NULL,
19581 if (type_id_list != NULL_TREE)
19582 return type_id_list;
19584 /* If it's not `throw', then there's no exception-specification. */
19585 if (!cp_parser_is_keyword (token, RID_THROW))
19589 /* Enable this once a lot of code has transitioned to noexcept? */
19590 if (cxx_dialect == cxx0x && !in_system_header)
19591 warning (OPT_Wdeprecated, "dynamic exception specifications are "
19592 "deprecated in C++0x; use %<noexcept%> instead");
19595 /* Consume the `throw'. */
19596 cp_lexer_consume_token (parser->lexer);
19598 /* Look for the `('. */
19599 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
19601 /* Peek at the next token. */
19602 token = cp_lexer_peek_token (parser->lexer);
19603 /* If it's not a `)', then there is a type-id-list. */
19604 if (token->type != CPP_CLOSE_PAREN)
19606 /* Types may not be defined in an exception-specification. */
19607 saved_message = parser->type_definition_forbidden_message;
19608 parser->type_definition_forbidden_message
19609 = G_("types may not be defined in an exception-specification");
19610 /* Parse the type-id-list. */
19611 type_id_list = cp_parser_type_id_list (parser);
19612 /* Restore the saved message. */
19613 parser->type_definition_forbidden_message = saved_message;
19616 type_id_list = empty_except_spec;
19618 /* Look for the `)'. */
19619 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
19621 return type_id_list;
19624 /* Parse an (optional) type-id-list.
19628 type-id-list , type-id ... [opt]
19630 Returns a TREE_LIST. The TREE_VALUE of each node is a TYPE,
19631 in the order that the types were presented. */
19634 cp_parser_type_id_list (cp_parser* parser)
19636 tree types = NULL_TREE;
19643 /* Get the next type-id. */
19644 type = cp_parser_type_id (parser);
19645 /* Parse the optional ellipsis. */
19646 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
19648 /* Consume the `...'. */
19649 cp_lexer_consume_token (parser->lexer);
19651 /* Turn the type into a pack expansion expression. */
19652 type = make_pack_expansion (type);
19654 /* Add it to the list. */
19655 types = add_exception_specifier (types, type, /*complain=*/1);
19656 /* Peek at the next token. */
19657 token = cp_lexer_peek_token (parser->lexer);
19658 /* If it is not a `,', we are done. */
19659 if (token->type != CPP_COMMA)
19661 /* Consume the `,'. */
19662 cp_lexer_consume_token (parser->lexer);
19665 return nreverse (types);
19668 /* Parse a try-block.
19671 try compound-statement handler-seq */
19674 cp_parser_try_block (cp_parser* parser)
19678 cp_parser_require_keyword (parser, RID_TRY, RT_TRY);
19679 try_block = begin_try_block ();
19680 cp_parser_compound_statement (parser, NULL, true, false);
19681 finish_try_block (try_block);
19682 cp_parser_handler_seq (parser);
19683 finish_handler_sequence (try_block);
19688 /* Parse a function-try-block.
19690 function-try-block:
19691 try ctor-initializer [opt] function-body handler-seq */
19694 cp_parser_function_try_block (cp_parser* parser)
19696 tree compound_stmt;
19698 bool ctor_initializer_p;
19700 /* Look for the `try' keyword. */
19701 if (!cp_parser_require_keyword (parser, RID_TRY, RT_TRY))
19703 /* Let the rest of the front end know where we are. */
19704 try_block = begin_function_try_block (&compound_stmt);
19705 /* Parse the function-body. */
19707 = cp_parser_ctor_initializer_opt_and_function_body (parser);
19708 /* We're done with the `try' part. */
19709 finish_function_try_block (try_block);
19710 /* Parse the handlers. */
19711 cp_parser_handler_seq (parser);
19712 /* We're done with the handlers. */
19713 finish_function_handler_sequence (try_block, compound_stmt);
19715 return ctor_initializer_p;
19718 /* Parse a handler-seq.
19721 handler handler-seq [opt] */
19724 cp_parser_handler_seq (cp_parser* parser)
19730 /* Parse the handler. */
19731 cp_parser_handler (parser);
19732 /* Peek at the next token. */
19733 token = cp_lexer_peek_token (parser->lexer);
19734 /* If it's not `catch' then there are no more handlers. */
19735 if (!cp_parser_is_keyword (token, RID_CATCH))
19740 /* Parse a handler.
19743 catch ( exception-declaration ) compound-statement */
19746 cp_parser_handler (cp_parser* parser)
19751 cp_parser_require_keyword (parser, RID_CATCH, RT_CATCH);
19752 handler = begin_handler ();
19753 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
19754 declaration = cp_parser_exception_declaration (parser);
19755 finish_handler_parms (declaration, handler);
19756 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
19757 cp_parser_compound_statement (parser, NULL, false, false);
19758 finish_handler (handler);
19761 /* Parse an exception-declaration.
19763 exception-declaration:
19764 type-specifier-seq declarator
19765 type-specifier-seq abstract-declarator
19769 Returns a VAR_DECL for the declaration, or NULL_TREE if the
19770 ellipsis variant is used. */
19773 cp_parser_exception_declaration (cp_parser* parser)
19775 cp_decl_specifier_seq type_specifiers;
19776 cp_declarator *declarator;
19777 const char *saved_message;
19779 /* If it's an ellipsis, it's easy to handle. */
19780 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
19782 /* Consume the `...' token. */
19783 cp_lexer_consume_token (parser->lexer);
19787 /* Types may not be defined in exception-declarations. */
19788 saved_message = parser->type_definition_forbidden_message;
19789 parser->type_definition_forbidden_message
19790 = G_("types may not be defined in exception-declarations");
19792 /* Parse the type-specifier-seq. */
19793 cp_parser_type_specifier_seq (parser, /*is_declaration=*/true,
19794 /*is_trailing_return=*/false,
19796 /* If it's a `)', then there is no declarator. */
19797 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_PAREN))
19800 declarator = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_EITHER,
19801 /*ctor_dtor_or_conv_p=*/NULL,
19802 /*parenthesized_p=*/NULL,
19803 /*member_p=*/false);
19805 /* Restore the saved message. */
19806 parser->type_definition_forbidden_message = saved_message;
19808 if (!type_specifiers.any_specifiers_p)
19809 return error_mark_node;
19811 return grokdeclarator (declarator, &type_specifiers, CATCHPARM, 1, NULL);
19814 /* Parse a throw-expression.
19817 throw assignment-expression [opt]
19819 Returns a THROW_EXPR representing the throw-expression. */
19822 cp_parser_throw_expression (cp_parser* parser)
19827 cp_parser_require_keyword (parser, RID_THROW, RT_THROW);
19828 token = cp_lexer_peek_token (parser->lexer);
19829 /* Figure out whether or not there is an assignment-expression
19830 following the "throw" keyword. */
19831 if (token->type == CPP_COMMA
19832 || token->type == CPP_SEMICOLON
19833 || token->type == CPP_CLOSE_PAREN
19834 || token->type == CPP_CLOSE_SQUARE
19835 || token->type == CPP_CLOSE_BRACE
19836 || token->type == CPP_COLON)
19837 expression = NULL_TREE;
19839 expression = cp_parser_assignment_expression (parser,
19840 /*cast_p=*/false, NULL);
19842 return build_throw (expression);
19845 /* GNU Extensions */
19847 /* Parse an (optional) asm-specification.
19850 asm ( string-literal )
19852 If the asm-specification is present, returns a STRING_CST
19853 corresponding to the string-literal. Otherwise, returns
19857 cp_parser_asm_specification_opt (cp_parser* parser)
19860 tree asm_specification;
19862 /* Peek at the next token. */
19863 token = cp_lexer_peek_token (parser->lexer);
19864 /* If the next token isn't the `asm' keyword, then there's no
19865 asm-specification. */
19866 if (!cp_parser_is_keyword (token, RID_ASM))
19869 /* Consume the `asm' token. */
19870 cp_lexer_consume_token (parser->lexer);
19871 /* Look for the `('. */
19872 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
19874 /* Look for the string-literal. */
19875 asm_specification = cp_parser_string_literal (parser, false, false);
19877 /* Look for the `)'. */
19878 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
19880 return asm_specification;
19883 /* Parse an asm-operand-list.
19887 asm-operand-list , asm-operand
19890 string-literal ( expression )
19891 [ string-literal ] string-literal ( expression )
19893 Returns a TREE_LIST representing the operands. The TREE_VALUE of
19894 each node is the expression. The TREE_PURPOSE is itself a
19895 TREE_LIST whose TREE_PURPOSE is a STRING_CST for the bracketed
19896 string-literal (or NULL_TREE if not present) and whose TREE_VALUE
19897 is a STRING_CST for the string literal before the parenthesis. Returns
19898 ERROR_MARK_NODE if any of the operands are invalid. */
19901 cp_parser_asm_operand_list (cp_parser* parser)
19903 tree asm_operands = NULL_TREE;
19904 bool invalid_operands = false;
19908 tree string_literal;
19912 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
19914 /* Consume the `[' token. */
19915 cp_lexer_consume_token (parser->lexer);
19916 /* Read the operand name. */
19917 name = cp_parser_identifier (parser);
19918 if (name != error_mark_node)
19919 name = build_string (IDENTIFIER_LENGTH (name),
19920 IDENTIFIER_POINTER (name));
19921 /* Look for the closing `]'. */
19922 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
19926 /* Look for the string-literal. */
19927 string_literal = cp_parser_string_literal (parser, false, false);
19929 /* Look for the `('. */
19930 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
19931 /* Parse the expression. */
19932 expression = cp_parser_expression (parser, /*cast_p=*/false, NULL);
19933 /* Look for the `)'. */
19934 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
19936 if (name == error_mark_node
19937 || string_literal == error_mark_node
19938 || expression == error_mark_node)
19939 invalid_operands = true;
19941 /* Add this operand to the list. */
19942 asm_operands = tree_cons (build_tree_list (name, string_literal),
19945 /* If the next token is not a `,', there are no more
19947 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
19949 /* Consume the `,'. */
19950 cp_lexer_consume_token (parser->lexer);
19953 return invalid_operands ? error_mark_node : nreverse (asm_operands);
19956 /* Parse an asm-clobber-list.
19960 asm-clobber-list , string-literal
19962 Returns a TREE_LIST, indicating the clobbers in the order that they
19963 appeared. The TREE_VALUE of each node is a STRING_CST. */
19966 cp_parser_asm_clobber_list (cp_parser* parser)
19968 tree clobbers = NULL_TREE;
19972 tree string_literal;
19974 /* Look for the string literal. */
19975 string_literal = cp_parser_string_literal (parser, false, false);
19976 /* Add it to the list. */
19977 clobbers = tree_cons (NULL_TREE, string_literal, clobbers);
19978 /* If the next token is not a `,', then the list is
19980 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
19982 /* Consume the `,' token. */
19983 cp_lexer_consume_token (parser->lexer);
19989 /* Parse an asm-label-list.
19993 asm-label-list , identifier
19995 Returns a TREE_LIST, indicating the labels in the order that they
19996 appeared. The TREE_VALUE of each node is a label. */
19999 cp_parser_asm_label_list (cp_parser* parser)
20001 tree labels = NULL_TREE;
20005 tree identifier, label, name;
20007 /* Look for the identifier. */
20008 identifier = cp_parser_identifier (parser);
20009 if (!error_operand_p (identifier))
20011 label = lookup_label (identifier);
20012 if (TREE_CODE (label) == LABEL_DECL)
20014 TREE_USED (label) = 1;
20015 check_goto (label);
20016 name = build_string (IDENTIFIER_LENGTH (identifier),
20017 IDENTIFIER_POINTER (identifier));
20018 labels = tree_cons (name, label, labels);
20021 /* If the next token is not a `,', then the list is
20023 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
20025 /* Consume the `,' token. */
20026 cp_lexer_consume_token (parser->lexer);
20029 return nreverse (labels);
20032 /* Parse an (optional) series of attributes.
20035 attributes attribute
20038 __attribute__ (( attribute-list [opt] ))
20040 The return value is as for cp_parser_attribute_list. */
20043 cp_parser_attributes_opt (cp_parser* parser)
20045 tree attributes = NULL_TREE;
20050 tree attribute_list;
20052 /* Peek at the next token. */
20053 token = cp_lexer_peek_token (parser->lexer);
20054 /* If it's not `__attribute__', then we're done. */
20055 if (token->keyword != RID_ATTRIBUTE)
20058 /* Consume the `__attribute__' keyword. */
20059 cp_lexer_consume_token (parser->lexer);
20060 /* Look for the two `(' tokens. */
20061 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
20062 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
20064 /* Peek at the next token. */
20065 token = cp_lexer_peek_token (parser->lexer);
20066 if (token->type != CPP_CLOSE_PAREN)
20067 /* Parse the attribute-list. */
20068 attribute_list = cp_parser_attribute_list (parser);
20070 /* If the next token is a `)', then there is no attribute
20072 attribute_list = NULL;
20074 /* Look for the two `)' tokens. */
20075 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
20076 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
20078 /* Add these new attributes to the list. */
20079 attributes = chainon (attributes, attribute_list);
20085 /* Parse an attribute-list.
20089 attribute-list , attribute
20093 identifier ( identifier )
20094 identifier ( identifier , expression-list )
20095 identifier ( expression-list )
20097 Returns a TREE_LIST, or NULL_TREE on error. Each node corresponds
20098 to an attribute. The TREE_PURPOSE of each node is the identifier
20099 indicating which attribute is in use. The TREE_VALUE represents
20100 the arguments, if any. */
20103 cp_parser_attribute_list (cp_parser* parser)
20105 tree attribute_list = NULL_TREE;
20106 bool save_translate_strings_p = parser->translate_strings_p;
20108 parser->translate_strings_p = false;
20115 /* Look for the identifier. We also allow keywords here; for
20116 example `__attribute__ ((const))' is legal. */
20117 token = cp_lexer_peek_token (parser->lexer);
20118 if (token->type == CPP_NAME
20119 || token->type == CPP_KEYWORD)
20121 tree arguments = NULL_TREE;
20123 /* Consume the token. */
20124 token = cp_lexer_consume_token (parser->lexer);
20126 /* Save away the identifier that indicates which attribute
20128 identifier = (token->type == CPP_KEYWORD)
20129 /* For keywords, use the canonical spelling, not the
20130 parsed identifier. */
20131 ? ridpointers[(int) token->keyword]
20134 attribute = build_tree_list (identifier, NULL_TREE);
20136 /* Peek at the next token. */
20137 token = cp_lexer_peek_token (parser->lexer);
20138 /* If it's an `(', then parse the attribute arguments. */
20139 if (token->type == CPP_OPEN_PAREN)
20142 int attr_flag = (attribute_takes_identifier_p (identifier)
20143 ? id_attr : normal_attr);
20144 vec = cp_parser_parenthesized_expression_list
20145 (parser, attr_flag, /*cast_p=*/false,
20146 /*allow_expansion_p=*/false,
20147 /*non_constant_p=*/NULL);
20149 arguments = error_mark_node;
20152 arguments = build_tree_list_vec (vec);
20153 release_tree_vector (vec);
20155 /* Save the arguments away. */
20156 TREE_VALUE (attribute) = arguments;
20159 if (arguments != error_mark_node)
20161 /* Add this attribute to the list. */
20162 TREE_CHAIN (attribute) = attribute_list;
20163 attribute_list = attribute;
20166 token = cp_lexer_peek_token (parser->lexer);
20168 /* Now, look for more attributes. If the next token isn't a
20169 `,', we're done. */
20170 if (token->type != CPP_COMMA)
20173 /* Consume the comma and keep going. */
20174 cp_lexer_consume_token (parser->lexer);
20176 parser->translate_strings_p = save_translate_strings_p;
20178 /* We built up the list in reverse order. */
20179 return nreverse (attribute_list);
20182 /* Parse an optional `__extension__' keyword. Returns TRUE if it is
20183 present, and FALSE otherwise. *SAVED_PEDANTIC is set to the
20184 current value of the PEDANTIC flag, regardless of whether or not
20185 the `__extension__' keyword is present. The caller is responsible
20186 for restoring the value of the PEDANTIC flag. */
20189 cp_parser_extension_opt (cp_parser* parser, int* saved_pedantic)
20191 /* Save the old value of the PEDANTIC flag. */
20192 *saved_pedantic = pedantic;
20194 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_EXTENSION))
20196 /* Consume the `__extension__' token. */
20197 cp_lexer_consume_token (parser->lexer);
20198 /* We're not being pedantic while the `__extension__' keyword is
20208 /* Parse a label declaration.
20211 __label__ label-declarator-seq ;
20213 label-declarator-seq:
20214 identifier , label-declarator-seq
20218 cp_parser_label_declaration (cp_parser* parser)
20220 /* Look for the `__label__' keyword. */
20221 cp_parser_require_keyword (parser, RID_LABEL, RT_LABEL);
20227 /* Look for an identifier. */
20228 identifier = cp_parser_identifier (parser);
20229 /* If we failed, stop. */
20230 if (identifier == error_mark_node)
20232 /* Declare it as a label. */
20233 finish_label_decl (identifier);
20234 /* If the next token is a `;', stop. */
20235 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
20237 /* Look for the `,' separating the label declarations. */
20238 cp_parser_require (parser, CPP_COMMA, RT_COMMA);
20241 /* Look for the final `;'. */
20242 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
20245 /* Support Functions */
20247 /* Looks up NAME in the current scope, as given by PARSER->SCOPE.
20248 NAME should have one of the representations used for an
20249 id-expression. If NAME is the ERROR_MARK_NODE, the ERROR_MARK_NODE
20250 is returned. If PARSER->SCOPE is a dependent type, then a
20251 SCOPE_REF is returned.
20253 If NAME is a TEMPLATE_ID_EXPR, then it will be immediately
20254 returned; the name was already resolved when the TEMPLATE_ID_EXPR
20255 was formed. Abstractly, such entities should not be passed to this
20256 function, because they do not need to be looked up, but it is
20257 simpler to check for this special case here, rather than at the
20260 In cases not explicitly covered above, this function returns a
20261 DECL, OVERLOAD, or baselink representing the result of the lookup.
20262 If there was no entity with the indicated NAME, the ERROR_MARK_NODE
20265 If TAG_TYPE is not NONE_TYPE, it indicates an explicit type keyword
20266 (e.g., "struct") that was used. In that case bindings that do not
20267 refer to types are ignored.
20269 If IS_TEMPLATE is TRUE, bindings that do not refer to templates are
20272 If IS_NAMESPACE is TRUE, bindings that do not refer to namespaces
20275 If CHECK_DEPENDENCY is TRUE, names are not looked up in dependent
20278 If AMBIGUOUS_DECLS is non-NULL, *AMBIGUOUS_DECLS is set to a
20279 TREE_LIST of candidates if name-lookup results in an ambiguity, and
20280 NULL_TREE otherwise. */
20283 cp_parser_lookup_name (cp_parser *parser, tree name,
20284 enum tag_types tag_type,
20287 bool check_dependency,
20288 tree *ambiguous_decls,
20289 location_t name_location)
20293 tree object_type = parser->context->object_type;
20295 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
20296 flags |= LOOKUP_COMPLAIN;
20298 /* Assume that the lookup will be unambiguous. */
20299 if (ambiguous_decls)
20300 *ambiguous_decls = NULL_TREE;
20302 /* Now that we have looked up the name, the OBJECT_TYPE (if any) is
20303 no longer valid. Note that if we are parsing tentatively, and
20304 the parse fails, OBJECT_TYPE will be automatically restored. */
20305 parser->context->object_type = NULL_TREE;
20307 if (name == error_mark_node)
20308 return error_mark_node;
20310 /* A template-id has already been resolved; there is no lookup to
20312 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
20314 if (BASELINK_P (name))
20316 gcc_assert (TREE_CODE (BASELINK_FUNCTIONS (name))
20317 == TEMPLATE_ID_EXPR);
20321 /* A BIT_NOT_EXPR is used to represent a destructor. By this point,
20322 it should already have been checked to make sure that the name
20323 used matches the type being destroyed. */
20324 if (TREE_CODE (name) == BIT_NOT_EXPR)
20328 /* Figure out to which type this destructor applies. */
20330 type = parser->scope;
20331 else if (object_type)
20332 type = object_type;
20334 type = current_class_type;
20335 /* If that's not a class type, there is no destructor. */
20336 if (!type || !CLASS_TYPE_P (type))
20337 return error_mark_node;
20338 if (CLASSTYPE_LAZY_DESTRUCTOR (type))
20339 lazily_declare_fn (sfk_destructor, type);
20340 if (!CLASSTYPE_DESTRUCTORS (type))
20341 return error_mark_node;
20342 /* If it was a class type, return the destructor. */
20343 return CLASSTYPE_DESTRUCTORS (type);
20346 /* By this point, the NAME should be an ordinary identifier. If
20347 the id-expression was a qualified name, the qualifying scope is
20348 stored in PARSER->SCOPE at this point. */
20349 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
20351 /* Perform the lookup. */
20356 if (parser->scope == error_mark_node)
20357 return error_mark_node;
20359 /* If the SCOPE is dependent, the lookup must be deferred until
20360 the template is instantiated -- unless we are explicitly
20361 looking up names in uninstantiated templates. Even then, we
20362 cannot look up the name if the scope is not a class type; it
20363 might, for example, be a template type parameter. */
20364 dependent_p = (TYPE_P (parser->scope)
20365 && dependent_scope_p (parser->scope));
20366 if ((check_dependency || !CLASS_TYPE_P (parser->scope))
20368 /* Defer lookup. */
20369 decl = error_mark_node;
20372 tree pushed_scope = NULL_TREE;
20374 /* If PARSER->SCOPE is a dependent type, then it must be a
20375 class type, and we must not be checking dependencies;
20376 otherwise, we would have processed this lookup above. So
20377 that PARSER->SCOPE is not considered a dependent base by
20378 lookup_member, we must enter the scope here. */
20380 pushed_scope = push_scope (parser->scope);
20382 /* If the PARSER->SCOPE is a template specialization, it
20383 may be instantiated during name lookup. In that case,
20384 errors may be issued. Even if we rollback the current
20385 tentative parse, those errors are valid. */
20386 decl = lookup_qualified_name (parser->scope, name,
20387 tag_type != none_type,
20388 /*complain=*/true);
20390 /* 3.4.3.1: In a lookup in which the constructor is an acceptable
20391 lookup result and the nested-name-specifier nominates a class C:
20392 * if the name specified after the nested-name-specifier, when
20393 looked up in C, is the injected-class-name of C (Clause 9), or
20394 * if the name specified after the nested-name-specifier is the
20395 same as the identifier or the simple-template-id's template-
20396 name in the last component of the nested-name-specifier,
20397 the name is instead considered to name the constructor of
20398 class C. [ Note: for example, the constructor is not an
20399 acceptable lookup result in an elaborated-type-specifier so
20400 the constructor would not be used in place of the
20401 injected-class-name. --end note ] Such a constructor name
20402 shall be used only in the declarator-id of a declaration that
20403 names a constructor or in a using-declaration. */
20404 if (tag_type == none_type
20405 && DECL_SELF_REFERENCE_P (decl)
20406 && same_type_p (DECL_CONTEXT (decl), parser->scope))
20407 decl = lookup_qualified_name (parser->scope, ctor_identifier,
20408 tag_type != none_type,
20409 /*complain=*/true);
20411 /* If we have a single function from a using decl, pull it out. */
20412 if (TREE_CODE (decl) == OVERLOAD
20413 && !really_overloaded_fn (decl))
20414 decl = OVL_FUNCTION (decl);
20417 pop_scope (pushed_scope);
20420 /* If the scope is a dependent type and either we deferred lookup or
20421 we did lookup but didn't find the name, rememeber the name. */
20422 if (decl == error_mark_node && TYPE_P (parser->scope)
20423 && dependent_type_p (parser->scope))
20429 /* The resolution to Core Issue 180 says that `struct
20430 A::B' should be considered a type-name, even if `A'
20432 type = make_typename_type (parser->scope, name, tag_type,
20433 /*complain=*/tf_error);
20434 decl = TYPE_NAME (type);
20436 else if (is_template
20437 && (cp_parser_next_token_ends_template_argument_p (parser)
20438 || cp_lexer_next_token_is (parser->lexer,
20440 decl = make_unbound_class_template (parser->scope,
20442 /*complain=*/tf_error);
20444 decl = build_qualified_name (/*type=*/NULL_TREE,
20445 parser->scope, name,
20448 parser->qualifying_scope = parser->scope;
20449 parser->object_scope = NULL_TREE;
20451 else if (object_type)
20453 tree object_decl = NULL_TREE;
20454 /* Look up the name in the scope of the OBJECT_TYPE, unless the
20455 OBJECT_TYPE is not a class. */
20456 if (CLASS_TYPE_P (object_type))
20457 /* If the OBJECT_TYPE is a template specialization, it may
20458 be instantiated during name lookup. In that case, errors
20459 may be issued. Even if we rollback the current tentative
20460 parse, those errors are valid. */
20461 object_decl = lookup_member (object_type,
20464 tag_type != none_type,
20465 tf_warning_or_error);
20466 /* Look it up in the enclosing context, too. */
20467 decl = lookup_name_real (name, tag_type != none_type,
20469 /*block_p=*/true, is_namespace, flags);
20470 parser->object_scope = object_type;
20471 parser->qualifying_scope = NULL_TREE;
20473 decl = object_decl;
20477 decl = lookup_name_real (name, tag_type != none_type,
20479 /*block_p=*/true, is_namespace, flags);
20480 parser->qualifying_scope = NULL_TREE;
20481 parser->object_scope = NULL_TREE;
20484 /* If the lookup failed, let our caller know. */
20485 if (!decl || decl == error_mark_node)
20486 return error_mark_node;
20488 /* Pull out the template from an injected-class-name (or multiple). */
20490 decl = maybe_get_template_decl_from_type_decl (decl);
20492 /* If it's a TREE_LIST, the result of the lookup was ambiguous. */
20493 if (TREE_CODE (decl) == TREE_LIST)
20495 if (ambiguous_decls)
20496 *ambiguous_decls = decl;
20497 /* The error message we have to print is too complicated for
20498 cp_parser_error, so we incorporate its actions directly. */
20499 if (!cp_parser_simulate_error (parser))
20501 error_at (name_location, "reference to %qD is ambiguous",
20503 print_candidates (decl);
20505 return error_mark_node;
20508 gcc_assert (DECL_P (decl)
20509 || TREE_CODE (decl) == OVERLOAD
20510 || TREE_CODE (decl) == SCOPE_REF
20511 || TREE_CODE (decl) == UNBOUND_CLASS_TEMPLATE
20512 || BASELINK_P (decl));
20514 /* If we have resolved the name of a member declaration, check to
20515 see if the declaration is accessible. When the name resolves to
20516 set of overloaded functions, accessibility is checked when
20517 overload resolution is done.
20519 During an explicit instantiation, access is not checked at all,
20520 as per [temp.explicit]. */
20522 check_accessibility_of_qualified_id (decl, object_type, parser->scope);
20524 maybe_record_typedef_use (decl);
20529 /* Like cp_parser_lookup_name, but for use in the typical case where
20530 CHECK_ACCESS is TRUE, IS_TYPE is FALSE, IS_TEMPLATE is FALSE,
20531 IS_NAMESPACE is FALSE, and CHECK_DEPENDENCY is TRUE. */
20534 cp_parser_lookup_name_simple (cp_parser* parser, tree name, location_t location)
20536 return cp_parser_lookup_name (parser, name,
20538 /*is_template=*/false,
20539 /*is_namespace=*/false,
20540 /*check_dependency=*/true,
20541 /*ambiguous_decls=*/NULL,
20545 /* If DECL is a TEMPLATE_DECL that can be treated like a TYPE_DECL in
20546 the current context, return the TYPE_DECL. If TAG_NAME_P is
20547 true, the DECL indicates the class being defined in a class-head,
20548 or declared in an elaborated-type-specifier.
20550 Otherwise, return DECL. */
20553 cp_parser_maybe_treat_template_as_class (tree decl, bool tag_name_p)
20555 /* If the TEMPLATE_DECL is being declared as part of a class-head,
20556 the translation from TEMPLATE_DECL to TYPE_DECL occurs:
20559 template <typename T> struct B;
20562 template <typename T> struct A::B {};
20564 Similarly, in an elaborated-type-specifier:
20566 namespace N { struct X{}; }
20569 template <typename T> friend struct N::X;
20572 However, if the DECL refers to a class type, and we are in
20573 the scope of the class, then the name lookup automatically
20574 finds the TYPE_DECL created by build_self_reference rather
20575 than a TEMPLATE_DECL. For example, in:
20577 template <class T> struct S {
20581 there is no need to handle such case. */
20583 if (DECL_CLASS_TEMPLATE_P (decl) && tag_name_p)
20584 return DECL_TEMPLATE_RESULT (decl);
20589 /* If too many, or too few, template-parameter lists apply to the
20590 declarator, issue an error message. Returns TRUE if all went well,
20591 and FALSE otherwise. */
20594 cp_parser_check_declarator_template_parameters (cp_parser* parser,
20595 cp_declarator *declarator,
20596 location_t declarator_location)
20598 unsigned num_templates;
20600 /* We haven't seen any classes that involve template parameters yet. */
20603 switch (declarator->kind)
20606 if (declarator->u.id.qualifying_scope)
20610 scope = declarator->u.id.qualifying_scope;
20612 while (scope && CLASS_TYPE_P (scope))
20614 /* You're supposed to have one `template <...>'
20615 for every template class, but you don't need one
20616 for a full specialization. For example:
20618 template <class T> struct S{};
20619 template <> struct S<int> { void f(); };
20620 void S<int>::f () {}
20622 is correct; there shouldn't be a `template <>' for
20623 the definition of `S<int>::f'. */
20624 if (!CLASSTYPE_TEMPLATE_INFO (scope))
20625 /* If SCOPE does not have template information of any
20626 kind, then it is not a template, nor is it nested
20627 within a template. */
20629 if (explicit_class_specialization_p (scope))
20631 if (PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (scope)))
20634 scope = TYPE_CONTEXT (scope);
20637 else if (TREE_CODE (declarator->u.id.unqualified_name)
20638 == TEMPLATE_ID_EXPR)
20639 /* If the DECLARATOR has the form `X<y>' then it uses one
20640 additional level of template parameters. */
20643 return cp_parser_check_template_parameters
20644 (parser, num_templates, declarator_location, declarator);
20650 case cdk_reference:
20652 return (cp_parser_check_declarator_template_parameters
20653 (parser, declarator->declarator, declarator_location));
20659 gcc_unreachable ();
20664 /* NUM_TEMPLATES were used in the current declaration. If that is
20665 invalid, return FALSE and issue an error messages. Otherwise,
20666 return TRUE. If DECLARATOR is non-NULL, then we are checking a
20667 declarator and we can print more accurate diagnostics. */
20670 cp_parser_check_template_parameters (cp_parser* parser,
20671 unsigned num_templates,
20672 location_t location,
20673 cp_declarator *declarator)
20675 /* If there are the same number of template classes and parameter
20676 lists, that's OK. */
20677 if (parser->num_template_parameter_lists == num_templates)
20679 /* If there are more, but only one more, then we are referring to a
20680 member template. That's OK too. */
20681 if (parser->num_template_parameter_lists == num_templates + 1)
20683 /* If there are more template classes than parameter lists, we have
20686 template <class T> void S<T>::R<T>::f (); */
20687 if (parser->num_template_parameter_lists < num_templates)
20689 if (declarator && !current_function_decl)
20690 error_at (location, "specializing member %<%T::%E%> "
20691 "requires %<template<>%> syntax",
20692 declarator->u.id.qualifying_scope,
20693 declarator->u.id.unqualified_name);
20694 else if (declarator)
20695 error_at (location, "invalid declaration of %<%T::%E%>",
20696 declarator->u.id.qualifying_scope,
20697 declarator->u.id.unqualified_name);
20699 error_at (location, "too few template-parameter-lists");
20702 /* Otherwise, there are too many template parameter lists. We have
20705 template <class T> template <class U> void S::f(); */
20706 error_at (location, "too many template-parameter-lists");
20710 /* Parse an optional `::' token indicating that the following name is
20711 from the global namespace. If so, PARSER->SCOPE is set to the
20712 GLOBAL_NAMESPACE. Otherwise, PARSER->SCOPE is set to NULL_TREE,
20713 unless CURRENT_SCOPE_VALID_P is TRUE, in which case it is left alone.
20714 Returns the new value of PARSER->SCOPE, if the `::' token is
20715 present, and NULL_TREE otherwise. */
20718 cp_parser_global_scope_opt (cp_parser* parser, bool current_scope_valid_p)
20722 /* Peek at the next token. */
20723 token = cp_lexer_peek_token (parser->lexer);
20724 /* If we're looking at a `::' token then we're starting from the
20725 global namespace, not our current location. */
20726 if (token->type == CPP_SCOPE)
20728 /* Consume the `::' token. */
20729 cp_lexer_consume_token (parser->lexer);
20730 /* Set the SCOPE so that we know where to start the lookup. */
20731 parser->scope = global_namespace;
20732 parser->qualifying_scope = global_namespace;
20733 parser->object_scope = NULL_TREE;
20735 return parser->scope;
20737 else if (!current_scope_valid_p)
20739 parser->scope = NULL_TREE;
20740 parser->qualifying_scope = NULL_TREE;
20741 parser->object_scope = NULL_TREE;
20747 /* Returns TRUE if the upcoming token sequence is the start of a
20748 constructor declarator. If FRIEND_P is true, the declarator is
20749 preceded by the `friend' specifier. */
20752 cp_parser_constructor_declarator_p (cp_parser *parser, bool friend_p)
20754 bool constructor_p;
20755 tree nested_name_specifier;
20756 cp_token *next_token;
20758 /* The common case is that this is not a constructor declarator, so
20759 try to avoid doing lots of work if at all possible. It's not
20760 valid declare a constructor at function scope. */
20761 if (parser->in_function_body)
20763 /* And only certain tokens can begin a constructor declarator. */
20764 next_token = cp_lexer_peek_token (parser->lexer);
20765 if (next_token->type != CPP_NAME
20766 && next_token->type != CPP_SCOPE
20767 && next_token->type != CPP_NESTED_NAME_SPECIFIER
20768 && next_token->type != CPP_TEMPLATE_ID)
20771 /* Parse tentatively; we are going to roll back all of the tokens
20773 cp_parser_parse_tentatively (parser);
20774 /* Assume that we are looking at a constructor declarator. */
20775 constructor_p = true;
20777 /* Look for the optional `::' operator. */
20778 cp_parser_global_scope_opt (parser,
20779 /*current_scope_valid_p=*/false);
20780 /* Look for the nested-name-specifier. */
20781 nested_name_specifier
20782 = (cp_parser_nested_name_specifier_opt (parser,
20783 /*typename_keyword_p=*/false,
20784 /*check_dependency_p=*/false,
20786 /*is_declaration=*/false));
20787 /* Outside of a class-specifier, there must be a
20788 nested-name-specifier. */
20789 if (!nested_name_specifier &&
20790 (!at_class_scope_p () || !TYPE_BEING_DEFINED (current_class_type)
20792 constructor_p = false;
20793 else if (nested_name_specifier == error_mark_node)
20794 constructor_p = false;
20796 /* If we have a class scope, this is easy; DR 147 says that S::S always
20797 names the constructor, and no other qualified name could. */
20798 if (constructor_p && nested_name_specifier
20799 && CLASS_TYPE_P (nested_name_specifier))
20801 tree id = cp_parser_unqualified_id (parser,
20802 /*template_keyword_p=*/false,
20803 /*check_dependency_p=*/false,
20804 /*declarator_p=*/true,
20805 /*optional_p=*/false);
20806 if (is_overloaded_fn (id))
20807 id = DECL_NAME (get_first_fn (id));
20808 if (!constructor_name_p (id, nested_name_specifier))
20809 constructor_p = false;
20811 /* If we still think that this might be a constructor-declarator,
20812 look for a class-name. */
20813 else if (constructor_p)
20817 template <typename T> struct S {
20821 we must recognize that the nested `S' names a class. */
20823 type_decl = cp_parser_class_name (parser,
20824 /*typename_keyword_p=*/false,
20825 /*template_keyword_p=*/false,
20827 /*check_dependency_p=*/false,
20828 /*class_head_p=*/false,
20829 /*is_declaration=*/false);
20830 /* If there was no class-name, then this is not a constructor. */
20831 constructor_p = !cp_parser_error_occurred (parser);
20833 /* If we're still considering a constructor, we have to see a `(',
20834 to begin the parameter-declaration-clause, followed by either a
20835 `)', an `...', or a decl-specifier. We need to check for a
20836 type-specifier to avoid being fooled into thinking that:
20840 is a constructor. (It is actually a function named `f' that
20841 takes one parameter (of type `int') and returns a value of type
20844 && !cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
20845 constructor_p = false;
20848 && cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN)
20849 && cp_lexer_next_token_is_not (parser->lexer, CPP_ELLIPSIS)
20850 /* A parameter declaration begins with a decl-specifier,
20851 which is either the "attribute" keyword, a storage class
20852 specifier, or (usually) a type-specifier. */
20853 && !cp_lexer_next_token_is_decl_specifier_keyword (parser->lexer))
20856 tree pushed_scope = NULL_TREE;
20857 unsigned saved_num_template_parameter_lists;
20859 /* Names appearing in the type-specifier should be looked up
20860 in the scope of the class. */
20861 if (current_class_type)
20865 type = TREE_TYPE (type_decl);
20866 if (TREE_CODE (type) == TYPENAME_TYPE)
20868 type = resolve_typename_type (type,
20869 /*only_current_p=*/false);
20870 if (TREE_CODE (type) == TYPENAME_TYPE)
20872 cp_parser_abort_tentative_parse (parser);
20876 pushed_scope = push_scope (type);
20879 /* Inside the constructor parameter list, surrounding
20880 template-parameter-lists do not apply. */
20881 saved_num_template_parameter_lists
20882 = parser->num_template_parameter_lists;
20883 parser->num_template_parameter_lists = 0;
20885 /* Look for the type-specifier. */
20886 cp_parser_type_specifier (parser,
20887 CP_PARSER_FLAGS_NONE,
20888 /*decl_specs=*/NULL,
20889 /*is_declarator=*/true,
20890 /*declares_class_or_enum=*/NULL,
20891 /*is_cv_qualifier=*/NULL);
20893 parser->num_template_parameter_lists
20894 = saved_num_template_parameter_lists;
20896 /* Leave the scope of the class. */
20898 pop_scope (pushed_scope);
20900 constructor_p = !cp_parser_error_occurred (parser);
20904 /* We did not really want to consume any tokens. */
20905 cp_parser_abort_tentative_parse (parser);
20907 return constructor_p;
20910 /* Parse the definition of the function given by the DECL_SPECIFIERS,
20911 ATTRIBUTES, and DECLARATOR. The access checks have been deferred;
20912 they must be performed once we are in the scope of the function.
20914 Returns the function defined. */
20917 cp_parser_function_definition_from_specifiers_and_declarator
20918 (cp_parser* parser,
20919 cp_decl_specifier_seq *decl_specifiers,
20921 const cp_declarator *declarator)
20926 /* Begin the function-definition. */
20927 success_p = start_function (decl_specifiers, declarator, attributes);
20929 /* The things we're about to see are not directly qualified by any
20930 template headers we've seen thus far. */
20931 reset_specialization ();
20933 /* If there were names looked up in the decl-specifier-seq that we
20934 did not check, check them now. We must wait until we are in the
20935 scope of the function to perform the checks, since the function
20936 might be a friend. */
20937 perform_deferred_access_checks ();
20941 /* Skip the entire function. */
20942 cp_parser_skip_to_end_of_block_or_statement (parser);
20943 fn = error_mark_node;
20945 else if (DECL_INITIAL (current_function_decl) != error_mark_node)
20947 /* Seen already, skip it. An error message has already been output. */
20948 cp_parser_skip_to_end_of_block_or_statement (parser);
20949 fn = current_function_decl;
20950 current_function_decl = NULL_TREE;
20951 /* If this is a function from a class, pop the nested class. */
20952 if (current_class_name)
20953 pop_nested_class ();
20958 if (DECL_DECLARED_INLINE_P (current_function_decl))
20959 tv = TV_PARSE_INLINE;
20961 tv = TV_PARSE_FUNC;
20963 fn = cp_parser_function_definition_after_declarator (parser,
20964 /*inline_p=*/false);
20971 /* Parse the part of a function-definition that follows the
20972 declarator. INLINE_P is TRUE iff this function is an inline
20973 function defined within a class-specifier.
20975 Returns the function defined. */
20978 cp_parser_function_definition_after_declarator (cp_parser* parser,
20982 bool ctor_initializer_p = false;
20983 bool saved_in_unbraced_linkage_specification_p;
20984 bool saved_in_function_body;
20985 unsigned saved_num_template_parameter_lists;
20988 saved_in_function_body = parser->in_function_body;
20989 parser->in_function_body = true;
20990 /* If the next token is `return', then the code may be trying to
20991 make use of the "named return value" extension that G++ used to
20993 token = cp_lexer_peek_token (parser->lexer);
20994 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_RETURN))
20996 /* Consume the `return' keyword. */
20997 cp_lexer_consume_token (parser->lexer);
20998 /* Look for the identifier that indicates what value is to be
21000 cp_parser_identifier (parser);
21001 /* Issue an error message. */
21002 error_at (token->location,
21003 "named return values are no longer supported");
21004 /* Skip tokens until we reach the start of the function body. */
21007 cp_token *token = cp_lexer_peek_token (parser->lexer);
21008 if (token->type == CPP_OPEN_BRACE
21009 || token->type == CPP_EOF
21010 || token->type == CPP_PRAGMA_EOL)
21012 cp_lexer_consume_token (parser->lexer);
21015 /* The `extern' in `extern "C" void f () { ... }' does not apply to
21016 anything declared inside `f'. */
21017 saved_in_unbraced_linkage_specification_p
21018 = parser->in_unbraced_linkage_specification_p;
21019 parser->in_unbraced_linkage_specification_p = false;
21020 /* Inside the function, surrounding template-parameter-lists do not
21022 saved_num_template_parameter_lists
21023 = parser->num_template_parameter_lists;
21024 parser->num_template_parameter_lists = 0;
21026 start_lambda_scope (current_function_decl);
21028 /* If the next token is `try', `__transaction_atomic', or
21029 `__transaction_relaxed`, then we are looking at either function-try-block
21030 or function-transaction-block. Note that all of these include the
21032 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TRANSACTION_ATOMIC))
21033 ctor_initializer_p = cp_parser_function_transaction (parser,
21034 RID_TRANSACTION_ATOMIC);
21035 else if (cp_lexer_next_token_is_keyword (parser->lexer,
21036 RID_TRANSACTION_RELAXED))
21037 ctor_initializer_p = cp_parser_function_transaction (parser,
21038 RID_TRANSACTION_RELAXED);
21039 else if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TRY))
21040 ctor_initializer_p = cp_parser_function_try_block (parser);
21043 = cp_parser_ctor_initializer_opt_and_function_body (parser);
21045 finish_lambda_scope ();
21047 /* Finish the function. */
21048 fn = finish_function ((ctor_initializer_p ? 1 : 0) |
21049 (inline_p ? 2 : 0));
21050 /* Generate code for it, if necessary. */
21051 expand_or_defer_fn (fn);
21052 /* Restore the saved values. */
21053 parser->in_unbraced_linkage_specification_p
21054 = saved_in_unbraced_linkage_specification_p;
21055 parser->num_template_parameter_lists
21056 = saved_num_template_parameter_lists;
21057 parser->in_function_body = saved_in_function_body;
21062 /* Parse a template-declaration, assuming that the `export' (and
21063 `extern') keywords, if present, has already been scanned. MEMBER_P
21064 is as for cp_parser_template_declaration. */
21067 cp_parser_template_declaration_after_export (cp_parser* parser, bool member_p)
21069 tree decl = NULL_TREE;
21070 VEC (deferred_access_check,gc) *checks;
21071 tree parameter_list;
21072 bool friend_p = false;
21073 bool need_lang_pop;
21076 /* Look for the `template' keyword. */
21077 token = cp_lexer_peek_token (parser->lexer);
21078 if (!cp_parser_require_keyword (parser, RID_TEMPLATE, RT_TEMPLATE))
21082 if (!cp_parser_require (parser, CPP_LESS, RT_LESS))
21084 if (at_class_scope_p () && current_function_decl)
21086 /* 14.5.2.2 [temp.mem]
21088 A local class shall not have member templates. */
21089 error_at (token->location,
21090 "invalid declaration of member template in local class");
21091 cp_parser_skip_to_end_of_block_or_statement (parser);
21096 A template ... shall not have C linkage. */
21097 if (current_lang_name == lang_name_c)
21099 error_at (token->location, "template with C linkage");
21100 /* Give it C++ linkage to avoid confusing other parts of the
21102 push_lang_context (lang_name_cplusplus);
21103 need_lang_pop = true;
21106 need_lang_pop = false;
21108 /* We cannot perform access checks on the template parameter
21109 declarations until we know what is being declared, just as we
21110 cannot check the decl-specifier list. */
21111 push_deferring_access_checks (dk_deferred);
21113 /* If the next token is `>', then we have an invalid
21114 specialization. Rather than complain about an invalid template
21115 parameter, issue an error message here. */
21116 if (cp_lexer_next_token_is (parser->lexer, CPP_GREATER))
21118 cp_parser_error (parser, "invalid explicit specialization");
21119 begin_specialization ();
21120 parameter_list = NULL_TREE;
21124 /* Parse the template parameters. */
21125 parameter_list = cp_parser_template_parameter_list (parser);
21126 fixup_template_parms ();
21129 /* Get the deferred access checks from the parameter list. These
21130 will be checked once we know what is being declared, as for a
21131 member template the checks must be performed in the scope of the
21132 class containing the member. */
21133 checks = get_deferred_access_checks ();
21135 /* Look for the `>'. */
21136 cp_parser_skip_to_end_of_template_parameter_list (parser);
21137 /* We just processed one more parameter list. */
21138 ++parser->num_template_parameter_lists;
21139 /* If the next token is `template', there are more template
21141 if (cp_lexer_next_token_is_keyword (parser->lexer,
21143 cp_parser_template_declaration_after_export (parser, member_p);
21144 else if (cxx_dialect >= cxx0x
21145 && cp_lexer_next_token_is_keyword (parser->lexer, RID_USING))
21146 decl = cp_parser_alias_declaration (parser);
21149 /* There are no access checks when parsing a template, as we do not
21150 know if a specialization will be a friend. */
21151 push_deferring_access_checks (dk_no_check);
21152 token = cp_lexer_peek_token (parser->lexer);
21153 decl = cp_parser_single_declaration (parser,
21156 /*explicit_specialization_p=*/false,
21158 pop_deferring_access_checks ();
21160 /* If this is a member template declaration, let the front
21162 if (member_p && !friend_p && decl)
21164 if (TREE_CODE (decl) == TYPE_DECL)
21165 cp_parser_check_access_in_redeclaration (decl, token->location);
21167 decl = finish_member_template_decl (decl);
21169 else if (friend_p && decl && TREE_CODE (decl) == TYPE_DECL)
21170 make_friend_class (current_class_type, TREE_TYPE (decl),
21171 /*complain=*/true);
21173 /* We are done with the current parameter list. */
21174 --parser->num_template_parameter_lists;
21176 pop_deferring_access_checks ();
21179 finish_template_decl (parameter_list);
21181 /* Check the template arguments for a literal operator template. */
21183 && (TREE_CODE (decl) == FUNCTION_DECL || DECL_FUNCTION_TEMPLATE_P (decl))
21184 && UDLIT_OPER_P (DECL_NAME (decl)))
21187 if (parameter_list == NULL_TREE)
21191 int num_parms = TREE_VEC_LENGTH (parameter_list);
21192 if (num_parms != 1)
21196 tree parm_list = TREE_VEC_ELT (parameter_list, 0);
21197 tree parm = INNERMOST_TEMPLATE_PARMS (parm_list);
21198 if (TREE_TYPE (parm) != char_type_node
21199 || !TEMPLATE_PARM_PARAMETER_PACK (DECL_INITIAL (parm)))
21204 error ("literal operator template %qD has invalid parameter list."
21205 " Expected non-type template argument pack <char...>",
21208 /* Register member declarations. */
21209 if (member_p && !friend_p && decl && !DECL_CLASS_TEMPLATE_P (decl))
21210 finish_member_declaration (decl);
21211 /* For the erroneous case of a template with C linkage, we pushed an
21212 implicit C++ linkage scope; exit that scope now. */
21214 pop_lang_context ();
21215 /* If DECL is a function template, we must return to parse it later.
21216 (Even though there is no definition, there might be default
21217 arguments that need handling.) */
21218 if (member_p && decl
21219 && (TREE_CODE (decl) == FUNCTION_DECL
21220 || DECL_FUNCTION_TEMPLATE_P (decl)))
21221 VEC_safe_push (tree, gc, unparsed_funs_with_definitions, decl);
21224 /* Perform the deferred access checks from a template-parameter-list.
21225 CHECKS is a TREE_LIST of access checks, as returned by
21226 get_deferred_access_checks. */
21229 cp_parser_perform_template_parameter_access_checks (VEC (deferred_access_check,gc)* checks)
21231 ++processing_template_parmlist;
21232 perform_access_checks (checks);
21233 --processing_template_parmlist;
21236 /* Parse a `decl-specifier-seq [opt] init-declarator [opt] ;' or
21237 `function-definition' sequence. MEMBER_P is true, this declaration
21238 appears in a class scope.
21240 Returns the DECL for the declared entity. If FRIEND_P is non-NULL,
21241 *FRIEND_P is set to TRUE iff the declaration is a friend. */
21244 cp_parser_single_declaration (cp_parser* parser,
21245 VEC (deferred_access_check,gc)* checks,
21247 bool explicit_specialization_p,
21250 int declares_class_or_enum;
21251 tree decl = NULL_TREE;
21252 cp_decl_specifier_seq decl_specifiers;
21253 bool function_definition_p = false;
21254 cp_token *decl_spec_token_start;
21256 /* This function is only used when processing a template
21258 gcc_assert (innermost_scope_kind () == sk_template_parms
21259 || innermost_scope_kind () == sk_template_spec);
21261 /* Defer access checks until we know what is being declared. */
21262 push_deferring_access_checks (dk_deferred);
21264 /* Try the `decl-specifier-seq [opt] init-declarator [opt]'
21266 decl_spec_token_start = cp_lexer_peek_token (parser->lexer);
21267 cp_parser_decl_specifier_seq (parser,
21268 CP_PARSER_FLAGS_OPTIONAL,
21270 &declares_class_or_enum);
21272 *friend_p = cp_parser_friend_p (&decl_specifiers);
21274 /* There are no template typedefs. */
21275 if (decl_specifiers.specs[(int) ds_typedef])
21277 error_at (decl_spec_token_start->location,
21278 "template declaration of %<typedef%>");
21279 decl = error_mark_node;
21282 /* Gather up the access checks that occurred the
21283 decl-specifier-seq. */
21284 stop_deferring_access_checks ();
21286 /* Check for the declaration of a template class. */
21287 if (declares_class_or_enum)
21289 if (cp_parser_declares_only_class_p (parser))
21291 decl = shadow_tag (&decl_specifiers);
21296 friend template <typename T> struct A<T>::B;
21299 A<T>::B will be represented by a TYPENAME_TYPE, and
21300 therefore not recognized by shadow_tag. */
21301 if (friend_p && *friend_p
21303 && decl_specifiers.type
21304 && TYPE_P (decl_specifiers.type))
21305 decl = decl_specifiers.type;
21307 if (decl && decl != error_mark_node)
21308 decl = TYPE_NAME (decl);
21310 decl = error_mark_node;
21312 /* Perform access checks for template parameters. */
21313 cp_parser_perform_template_parameter_access_checks (checks);
21317 /* Complain about missing 'typename' or other invalid type names. */
21318 if (!decl_specifiers.any_type_specifiers_p
21319 && cp_parser_parse_and_diagnose_invalid_type_name (parser))
21321 /* cp_parser_parse_and_diagnose_invalid_type_name calls
21322 cp_parser_skip_to_end_of_block_or_statement, so don't try to parse
21323 the rest of this declaration. */
21324 decl = error_mark_node;
21328 /* If it's not a template class, try for a template function. If
21329 the next token is a `;', then this declaration does not declare
21330 anything. But, if there were errors in the decl-specifiers, then
21331 the error might well have come from an attempted class-specifier.
21332 In that case, there's no need to warn about a missing declarator. */
21334 && (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON)
21335 || decl_specifiers.type != error_mark_node))
21337 decl = cp_parser_init_declarator (parser,
21340 /*function_definition_allowed_p=*/true,
21342 declares_class_or_enum,
21343 &function_definition_p,
21346 /* 7.1.1-1 [dcl.stc]
21348 A storage-class-specifier shall not be specified in an explicit
21349 specialization... */
21351 && explicit_specialization_p
21352 && decl_specifiers.storage_class != sc_none)
21354 error_at (decl_spec_token_start->location,
21355 "explicit template specialization cannot have a storage class");
21356 decl = error_mark_node;
21360 /* Look for a trailing `;' after the declaration. */
21361 if (!function_definition_p
21362 && (decl == error_mark_node
21363 || !cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON)))
21364 cp_parser_skip_to_end_of_block_or_statement (parser);
21367 pop_deferring_access_checks ();
21369 /* Clear any current qualification; whatever comes next is the start
21370 of something new. */
21371 parser->scope = NULL_TREE;
21372 parser->qualifying_scope = NULL_TREE;
21373 parser->object_scope = NULL_TREE;
21378 /* Parse a cast-expression that is not the operand of a unary "&". */
21381 cp_parser_simple_cast_expression (cp_parser *parser)
21383 return cp_parser_cast_expression (parser, /*address_p=*/false,
21384 /*cast_p=*/false, NULL);
21387 /* Parse a functional cast to TYPE. Returns an expression
21388 representing the cast. */
21391 cp_parser_functional_cast (cp_parser* parser, tree type)
21394 tree expression_list;
21398 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
21400 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
21401 expression_list = cp_parser_braced_list (parser, &nonconst_p);
21402 CONSTRUCTOR_IS_DIRECT_INIT (expression_list) = 1;
21403 if (TREE_CODE (type) == TYPE_DECL)
21404 type = TREE_TYPE (type);
21405 return finish_compound_literal (type, expression_list,
21406 tf_warning_or_error);
21410 vec = cp_parser_parenthesized_expression_list (parser, non_attr,
21412 /*allow_expansion_p=*/true,
21413 /*non_constant_p=*/NULL);
21415 expression_list = error_mark_node;
21418 expression_list = build_tree_list_vec (vec);
21419 release_tree_vector (vec);
21422 cast = build_functional_cast (type, expression_list,
21423 tf_warning_or_error);
21424 /* [expr.const]/1: In an integral constant expression "only type
21425 conversions to integral or enumeration type can be used". */
21426 if (TREE_CODE (type) == TYPE_DECL)
21427 type = TREE_TYPE (type);
21428 if (cast != error_mark_node
21429 && !cast_valid_in_integral_constant_expression_p (type)
21430 && cp_parser_non_integral_constant_expression (parser,
21432 return error_mark_node;
21436 /* Save the tokens that make up the body of a member function defined
21437 in a class-specifier. The DECL_SPECIFIERS and DECLARATOR have
21438 already been parsed. The ATTRIBUTES are any GNU "__attribute__"
21439 specifiers applied to the declaration. Returns the FUNCTION_DECL
21440 for the member function. */
21443 cp_parser_save_member_function_body (cp_parser* parser,
21444 cp_decl_specifier_seq *decl_specifiers,
21445 cp_declarator *declarator,
21452 /* Create the FUNCTION_DECL. */
21453 fn = grokmethod (decl_specifiers, declarator, attributes);
21454 /* If something went badly wrong, bail out now. */
21455 if (fn == error_mark_node)
21457 /* If there's a function-body, skip it. */
21458 if (cp_parser_token_starts_function_definition_p
21459 (cp_lexer_peek_token (parser->lexer)))
21460 cp_parser_skip_to_end_of_block_or_statement (parser);
21461 return error_mark_node;
21464 /* Remember it, if there default args to post process. */
21465 cp_parser_save_default_args (parser, fn);
21467 /* Save away the tokens that make up the body of the
21469 first = parser->lexer->next_token;
21470 /* We can have braced-init-list mem-initializers before the fn body. */
21471 if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
21473 cp_lexer_consume_token (parser->lexer);
21474 while (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE)
21475 && cp_lexer_next_token_is_not_keyword (parser->lexer, RID_TRY))
21477 /* cache_group will stop after an un-nested { } pair, too. */
21478 if (cp_parser_cache_group (parser, CPP_CLOSE_PAREN, /*depth=*/0))
21481 /* variadic mem-inits have ... after the ')'. */
21482 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
21483 cp_lexer_consume_token (parser->lexer);
21486 cp_parser_cache_group (parser, CPP_CLOSE_BRACE, /*depth=*/0);
21487 /* Handle function try blocks. */
21488 while (cp_lexer_next_token_is_keyword (parser->lexer, RID_CATCH))
21489 cp_parser_cache_group (parser, CPP_CLOSE_BRACE, /*depth=*/0);
21490 last = parser->lexer->next_token;
21492 /* Save away the inline definition; we will process it when the
21493 class is complete. */
21494 DECL_PENDING_INLINE_INFO (fn) = cp_token_cache_new (first, last);
21495 DECL_PENDING_INLINE_P (fn) = 1;
21497 /* We need to know that this was defined in the class, so that
21498 friend templates are handled correctly. */
21499 DECL_INITIALIZED_IN_CLASS_P (fn) = 1;
21501 /* Add FN to the queue of functions to be parsed later. */
21502 VEC_safe_push (tree, gc, unparsed_funs_with_definitions, fn);
21507 /* Save the tokens that make up the in-class initializer for a non-static
21508 data member. Returns a DEFAULT_ARG. */
21511 cp_parser_save_nsdmi (cp_parser* parser)
21513 return cp_parser_cache_defarg (parser, /*nsdmi=*/true);
21516 /* Parse a template-argument-list, as well as the trailing ">" (but
21517 not the opening "<"). See cp_parser_template_argument_list for the
21521 cp_parser_enclosed_template_argument_list (cp_parser* parser)
21525 tree saved_qualifying_scope;
21526 tree saved_object_scope;
21527 bool saved_greater_than_is_operator_p;
21528 int saved_unevaluated_operand;
21529 int saved_inhibit_evaluation_warnings;
21533 When parsing a template-id, the first non-nested `>' is taken as
21534 the end of the template-argument-list rather than a greater-than
21536 saved_greater_than_is_operator_p
21537 = parser->greater_than_is_operator_p;
21538 parser->greater_than_is_operator_p = false;
21539 /* Parsing the argument list may modify SCOPE, so we save it
21541 saved_scope = parser->scope;
21542 saved_qualifying_scope = parser->qualifying_scope;
21543 saved_object_scope = parser->object_scope;
21544 /* We need to evaluate the template arguments, even though this
21545 template-id may be nested within a "sizeof". */
21546 saved_unevaluated_operand = cp_unevaluated_operand;
21547 cp_unevaluated_operand = 0;
21548 saved_inhibit_evaluation_warnings = c_inhibit_evaluation_warnings;
21549 c_inhibit_evaluation_warnings = 0;
21550 /* Parse the template-argument-list itself. */
21551 if (cp_lexer_next_token_is (parser->lexer, CPP_GREATER)
21552 || cp_lexer_next_token_is (parser->lexer, CPP_RSHIFT))
21553 arguments = NULL_TREE;
21555 arguments = cp_parser_template_argument_list (parser);
21556 /* Look for the `>' that ends the template-argument-list. If we find
21557 a '>>' instead, it's probably just a typo. */
21558 if (cp_lexer_next_token_is (parser->lexer, CPP_RSHIFT))
21560 if (cxx_dialect != cxx98)
21562 /* In C++0x, a `>>' in a template argument list or cast
21563 expression is considered to be two separate `>'
21564 tokens. So, change the current token to a `>', but don't
21565 consume it: it will be consumed later when the outer
21566 template argument list (or cast expression) is parsed.
21567 Note that this replacement of `>' for `>>' is necessary
21568 even if we are parsing tentatively: in the tentative
21569 case, after calling
21570 cp_parser_enclosed_template_argument_list we will always
21571 throw away all of the template arguments and the first
21572 closing `>', either because the template argument list
21573 was erroneous or because we are replacing those tokens
21574 with a CPP_TEMPLATE_ID token. The second `>' (which will
21575 not have been thrown away) is needed either to close an
21576 outer template argument list or to complete a new-style
21578 cp_token *token = cp_lexer_peek_token (parser->lexer);
21579 token->type = CPP_GREATER;
21581 else if (!saved_greater_than_is_operator_p)
21583 /* If we're in a nested template argument list, the '>>' has
21584 to be a typo for '> >'. We emit the error message, but we
21585 continue parsing and we push a '>' as next token, so that
21586 the argument list will be parsed correctly. Note that the
21587 global source location is still on the token before the
21588 '>>', so we need to say explicitly where we want it. */
21589 cp_token *token = cp_lexer_peek_token (parser->lexer);
21590 error_at (token->location, "%<>>%> should be %<> >%> "
21591 "within a nested template argument list");
21593 token->type = CPP_GREATER;
21597 /* If this is not a nested template argument list, the '>>'
21598 is a typo for '>'. Emit an error message and continue.
21599 Same deal about the token location, but here we can get it
21600 right by consuming the '>>' before issuing the diagnostic. */
21601 cp_token *token = cp_lexer_consume_token (parser->lexer);
21602 error_at (token->location,
21603 "spurious %<>>%>, use %<>%> to terminate "
21604 "a template argument list");
21608 cp_parser_skip_to_end_of_template_parameter_list (parser);
21609 /* The `>' token might be a greater-than operator again now. */
21610 parser->greater_than_is_operator_p
21611 = saved_greater_than_is_operator_p;
21612 /* Restore the SAVED_SCOPE. */
21613 parser->scope = saved_scope;
21614 parser->qualifying_scope = saved_qualifying_scope;
21615 parser->object_scope = saved_object_scope;
21616 cp_unevaluated_operand = saved_unevaluated_operand;
21617 c_inhibit_evaluation_warnings = saved_inhibit_evaluation_warnings;
21622 /* MEMBER_FUNCTION is a member function, or a friend. If default
21623 arguments, or the body of the function have not yet been parsed,
21627 cp_parser_late_parsing_for_member (cp_parser* parser, tree member_function)
21629 timevar_push (TV_PARSE_INMETH);
21630 /* If this member is a template, get the underlying
21632 if (DECL_FUNCTION_TEMPLATE_P (member_function))
21633 member_function = DECL_TEMPLATE_RESULT (member_function);
21635 /* There should not be any class definitions in progress at this
21636 point; the bodies of members are only parsed outside of all class
21638 gcc_assert (parser->num_classes_being_defined == 0);
21639 /* While we're parsing the member functions we might encounter more
21640 classes. We want to handle them right away, but we don't want
21641 them getting mixed up with functions that are currently in the
21643 push_unparsed_function_queues (parser);
21645 /* Make sure that any template parameters are in scope. */
21646 maybe_begin_member_template_processing (member_function);
21648 /* If the body of the function has not yet been parsed, parse it
21650 if (DECL_PENDING_INLINE_P (member_function))
21652 tree function_scope;
21653 cp_token_cache *tokens;
21655 /* The function is no longer pending; we are processing it. */
21656 tokens = DECL_PENDING_INLINE_INFO (member_function);
21657 DECL_PENDING_INLINE_INFO (member_function) = NULL;
21658 DECL_PENDING_INLINE_P (member_function) = 0;
21660 /* If this is a local class, enter the scope of the containing
21662 function_scope = current_function_decl;
21663 if (function_scope)
21664 push_function_context ();
21666 /* Push the body of the function onto the lexer stack. */
21667 cp_parser_push_lexer_for_tokens (parser, tokens);
21669 /* Let the front end know that we going to be defining this
21671 start_preparsed_function (member_function, NULL_TREE,
21672 SF_PRE_PARSED | SF_INCLASS_INLINE);
21674 /* Don't do access checking if it is a templated function. */
21675 if (processing_template_decl)
21676 push_deferring_access_checks (dk_no_check);
21678 /* Now, parse the body of the function. */
21679 cp_parser_function_definition_after_declarator (parser,
21680 /*inline_p=*/true);
21682 if (processing_template_decl)
21683 pop_deferring_access_checks ();
21685 /* Leave the scope of the containing function. */
21686 if (function_scope)
21687 pop_function_context ();
21688 cp_parser_pop_lexer (parser);
21691 /* Remove any template parameters from the symbol table. */
21692 maybe_end_member_template_processing ();
21694 /* Restore the queue. */
21695 pop_unparsed_function_queues (parser);
21696 timevar_pop (TV_PARSE_INMETH);
21699 /* If DECL contains any default args, remember it on the unparsed
21700 functions queue. */
21703 cp_parser_save_default_args (cp_parser* parser, tree decl)
21707 for (probe = TYPE_ARG_TYPES (TREE_TYPE (decl));
21709 probe = TREE_CHAIN (probe))
21710 if (TREE_PURPOSE (probe))
21712 cp_default_arg_entry *entry
21713 = VEC_safe_push (cp_default_arg_entry, gc,
21714 unparsed_funs_with_default_args, NULL);
21715 entry->class_type = current_class_type;
21716 entry->decl = decl;
21721 /* DEFAULT_ARG contains the saved tokens for the initializer of DECL,
21722 which is either a FIELD_DECL or PARM_DECL. Parse it and return
21723 the result. For a PARM_DECL, PARMTYPE is the corresponding type
21724 from the parameter-type-list. */
21727 cp_parser_late_parse_one_default_arg (cp_parser *parser, tree decl,
21728 tree default_arg, tree parmtype)
21730 cp_token_cache *tokens;
21734 if (default_arg == error_mark_node)
21735 return error_mark_node;
21737 /* Push the saved tokens for the default argument onto the parser's
21739 tokens = DEFARG_TOKENS (default_arg);
21740 cp_parser_push_lexer_for_tokens (parser, tokens);
21742 start_lambda_scope (decl);
21744 /* Parse the default argument. */
21745 parsed_arg = cp_parser_initializer (parser, &dummy, &dummy);
21746 if (BRACE_ENCLOSED_INITIALIZER_P (parsed_arg))
21747 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
21749 finish_lambda_scope ();
21751 if (!processing_template_decl)
21753 /* In a non-template class, check conversions now. In a template,
21754 we'll wait and instantiate these as needed. */
21755 if (TREE_CODE (decl) == PARM_DECL)
21756 parsed_arg = check_default_argument (parmtype, parsed_arg);
21759 int flags = LOOKUP_IMPLICIT;
21760 if (BRACE_ENCLOSED_INITIALIZER_P (parsed_arg)
21761 && CONSTRUCTOR_IS_DIRECT_INIT (parsed_arg))
21762 flags = LOOKUP_NORMAL;
21763 parsed_arg = digest_init_flags (TREE_TYPE (decl), parsed_arg, flags);
21767 /* If the token stream has not been completely used up, then
21768 there was extra junk after the end of the default
21770 if (!cp_lexer_next_token_is (parser->lexer, CPP_EOF))
21772 if (TREE_CODE (decl) == PARM_DECL)
21773 cp_parser_error (parser, "expected %<,%>");
21775 cp_parser_error (parser, "expected %<;%>");
21778 /* Revert to the main lexer. */
21779 cp_parser_pop_lexer (parser);
21784 /* FIELD is a non-static data member with an initializer which we saved for
21785 later; parse it now. */
21788 cp_parser_late_parsing_nsdmi (cp_parser *parser, tree field)
21792 push_unparsed_function_queues (parser);
21793 def = cp_parser_late_parse_one_default_arg (parser, field,
21794 DECL_INITIAL (field),
21796 pop_unparsed_function_queues (parser);
21798 DECL_INITIAL (field) = def;
21801 /* FN is a FUNCTION_DECL which may contains a parameter with an
21802 unparsed DEFAULT_ARG. Parse the default args now. This function
21803 assumes that the current scope is the scope in which the default
21804 argument should be processed. */
21807 cp_parser_late_parsing_default_args (cp_parser *parser, tree fn)
21809 bool saved_local_variables_forbidden_p;
21810 tree parm, parmdecl;
21812 /* While we're parsing the default args, we might (due to the
21813 statement expression extension) encounter more classes. We want
21814 to handle them right away, but we don't want them getting mixed
21815 up with default args that are currently in the queue. */
21816 push_unparsed_function_queues (parser);
21818 /* Local variable names (and the `this' keyword) may not appear
21819 in a default argument. */
21820 saved_local_variables_forbidden_p = parser->local_variables_forbidden_p;
21821 parser->local_variables_forbidden_p = true;
21823 push_defarg_context (fn);
21825 for (parm = TYPE_ARG_TYPES (TREE_TYPE (fn)),
21826 parmdecl = DECL_ARGUMENTS (fn);
21827 parm && parm != void_list_node;
21828 parm = TREE_CHAIN (parm),
21829 parmdecl = DECL_CHAIN (parmdecl))
21831 tree default_arg = TREE_PURPOSE (parm);
21833 VEC(tree,gc) *insts;
21840 if (TREE_CODE (default_arg) != DEFAULT_ARG)
21841 /* This can happen for a friend declaration for a function
21842 already declared with default arguments. */
21846 = cp_parser_late_parse_one_default_arg (parser, parmdecl,
21848 TREE_VALUE (parm));
21849 if (parsed_arg == error_mark_node)
21854 TREE_PURPOSE (parm) = parsed_arg;
21856 /* Update any instantiations we've already created. */
21857 for (insts = DEFARG_INSTANTIATIONS (default_arg), ix = 0;
21858 VEC_iterate (tree, insts, ix, copy); ix++)
21859 TREE_PURPOSE (copy) = parsed_arg;
21862 pop_defarg_context ();
21864 /* Make sure no default arg is missing. */
21865 check_default_args (fn);
21867 /* Restore the state of local_variables_forbidden_p. */
21868 parser->local_variables_forbidden_p = saved_local_variables_forbidden_p;
21870 /* Restore the queue. */
21871 pop_unparsed_function_queues (parser);
21874 /* Parse the operand of `sizeof' (or a similar operator). Returns
21875 either a TYPE or an expression, depending on the form of the
21876 input. The KEYWORD indicates which kind of expression we have
21880 cp_parser_sizeof_operand (cp_parser* parser, enum rid keyword)
21882 tree expr = NULL_TREE;
21883 const char *saved_message;
21885 bool saved_integral_constant_expression_p;
21886 bool saved_non_integral_constant_expression_p;
21887 bool pack_expansion_p = false;
21889 /* Types cannot be defined in a `sizeof' expression. Save away the
21891 saved_message = parser->type_definition_forbidden_message;
21892 /* And create the new one. */
21893 tmp = concat ("types may not be defined in %<",
21894 IDENTIFIER_POINTER (ridpointers[keyword]),
21895 "%> expressions", NULL);
21896 parser->type_definition_forbidden_message = tmp;
21898 /* The restrictions on constant-expressions do not apply inside
21899 sizeof expressions. */
21900 saved_integral_constant_expression_p
21901 = parser->integral_constant_expression_p;
21902 saved_non_integral_constant_expression_p
21903 = parser->non_integral_constant_expression_p;
21904 parser->integral_constant_expression_p = false;
21906 /* If it's a `...', then we are computing the length of a parameter
21908 if (keyword == RID_SIZEOF
21909 && cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
21911 /* Consume the `...'. */
21912 cp_lexer_consume_token (parser->lexer);
21913 maybe_warn_variadic_templates ();
21915 /* Note that this is an expansion. */
21916 pack_expansion_p = true;
21919 /* Do not actually evaluate the expression. */
21920 ++cp_unevaluated_operand;
21921 ++c_inhibit_evaluation_warnings;
21922 /* If it's a `(', then we might be looking at the type-id
21924 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
21927 bool saved_in_type_id_in_expr_p;
21929 /* We can't be sure yet whether we're looking at a type-id or an
21931 cp_parser_parse_tentatively (parser);
21932 /* Consume the `('. */
21933 cp_lexer_consume_token (parser->lexer);
21934 /* Parse the type-id. */
21935 saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
21936 parser->in_type_id_in_expr_p = true;
21937 type = cp_parser_type_id (parser);
21938 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
21939 /* Now, look for the trailing `)'. */
21940 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
21941 /* If all went well, then we're done. */
21942 if (cp_parser_parse_definitely (parser))
21944 cp_decl_specifier_seq decl_specs;
21946 /* Build a trivial decl-specifier-seq. */
21947 clear_decl_specs (&decl_specs);
21948 decl_specs.type = type;
21950 /* Call grokdeclarator to figure out what type this is. */
21951 expr = grokdeclarator (NULL,
21955 /*attrlist=*/NULL);
21959 /* If the type-id production did not work out, then we must be
21960 looking at the unary-expression production. */
21962 expr = cp_parser_unary_expression (parser, /*address_p=*/false,
21963 /*cast_p=*/false, NULL);
21965 if (pack_expansion_p)
21966 /* Build a pack expansion. */
21967 expr = make_pack_expansion (expr);
21969 /* Go back to evaluating expressions. */
21970 --cp_unevaluated_operand;
21971 --c_inhibit_evaluation_warnings;
21973 /* Free the message we created. */
21975 /* And restore the old one. */
21976 parser->type_definition_forbidden_message = saved_message;
21977 parser->integral_constant_expression_p
21978 = saved_integral_constant_expression_p;
21979 parser->non_integral_constant_expression_p
21980 = saved_non_integral_constant_expression_p;
21985 /* If the current declaration has no declarator, return true. */
21988 cp_parser_declares_only_class_p (cp_parser *parser)
21990 /* If the next token is a `;' or a `,' then there is no
21992 return (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)
21993 || cp_lexer_next_token_is (parser->lexer, CPP_COMMA));
21996 /* Update the DECL_SPECS to reflect the storage class indicated by
22000 cp_parser_set_storage_class (cp_parser *parser,
22001 cp_decl_specifier_seq *decl_specs,
22003 location_t location)
22005 cp_storage_class storage_class;
22007 if (parser->in_unbraced_linkage_specification_p)
22009 error_at (location, "invalid use of %qD in linkage specification",
22010 ridpointers[keyword]);
22013 else if (decl_specs->storage_class != sc_none)
22015 decl_specs->conflicting_specifiers_p = true;
22019 if ((keyword == RID_EXTERN || keyword == RID_STATIC)
22020 && decl_specs->specs[(int) ds_thread])
22022 error_at (location, "%<__thread%> before %qD", ridpointers[keyword]);
22023 decl_specs->specs[(int) ds_thread] = 0;
22029 storage_class = sc_auto;
22032 storage_class = sc_register;
22035 storage_class = sc_static;
22038 storage_class = sc_extern;
22041 storage_class = sc_mutable;
22044 gcc_unreachable ();
22046 decl_specs->storage_class = storage_class;
22048 /* A storage class specifier cannot be applied alongside a typedef
22049 specifier. If there is a typedef specifier present then set
22050 conflicting_specifiers_p which will trigger an error later
22051 on in grokdeclarator. */
22052 if (decl_specs->specs[(int)ds_typedef])
22053 decl_specs->conflicting_specifiers_p = true;
22056 /* Update the DECL_SPECS to reflect the TYPE_SPEC. If TYPE_DEFINITION_P
22057 is true, the type is a class or enum definition. */
22060 cp_parser_set_decl_spec_type (cp_decl_specifier_seq *decl_specs,
22062 location_t location,
22063 bool type_definition_p)
22065 decl_specs->any_specifiers_p = true;
22067 /* If the user tries to redeclare bool, char16_t, char32_t, or wchar_t
22068 (with, for example, in "typedef int wchar_t;") we remember that
22069 this is what happened. In system headers, we ignore these
22070 declarations so that G++ can work with system headers that are not
22072 if (decl_specs->specs[(int) ds_typedef]
22073 && !type_definition_p
22074 && (type_spec == boolean_type_node
22075 || type_spec == char16_type_node
22076 || type_spec == char32_type_node
22077 || type_spec == wchar_type_node)
22078 && (decl_specs->type
22079 || decl_specs->specs[(int) ds_long]
22080 || decl_specs->specs[(int) ds_short]
22081 || decl_specs->specs[(int) ds_unsigned]
22082 || decl_specs->specs[(int) ds_signed]))
22084 decl_specs->redefined_builtin_type = type_spec;
22085 if (!decl_specs->type)
22087 decl_specs->type = type_spec;
22088 decl_specs->type_definition_p = false;
22089 decl_specs->type_location = location;
22092 else if (decl_specs->type)
22093 decl_specs->multiple_types_p = true;
22096 decl_specs->type = type_spec;
22097 decl_specs->type_definition_p = type_definition_p;
22098 decl_specs->redefined_builtin_type = NULL_TREE;
22099 decl_specs->type_location = location;
22103 /* DECL_SPECIFIERS is the representation of a decl-specifier-seq.
22104 Returns TRUE iff `friend' appears among the DECL_SPECIFIERS. */
22107 cp_parser_friend_p (const cp_decl_specifier_seq *decl_specifiers)
22109 return decl_specifiers->specs[(int) ds_friend] != 0;
22112 /* Issue an error message indicating that TOKEN_DESC was expected.
22113 If KEYWORD is true, it indicated this function is called by
22114 cp_parser_require_keword and the required token can only be
22115 a indicated keyword. */
22118 cp_parser_required_error (cp_parser *parser,
22119 required_token token_desc,
22122 switch (token_desc)
22125 cp_parser_error (parser, "expected %<new%>");
22128 cp_parser_error (parser, "expected %<delete%>");
22131 cp_parser_error (parser, "expected %<return%>");
22134 cp_parser_error (parser, "expected %<while%>");
22137 cp_parser_error (parser, "expected %<extern%>");
22139 case RT_STATIC_ASSERT:
22140 cp_parser_error (parser, "expected %<static_assert%>");
22143 cp_parser_error (parser, "expected %<decltype%>");
22146 cp_parser_error (parser, "expected %<operator%>");
22149 cp_parser_error (parser, "expected %<class%>");
22152 cp_parser_error (parser, "expected %<template%>");
22155 cp_parser_error (parser, "expected %<namespace%>");
22158 cp_parser_error (parser, "expected %<using%>");
22161 cp_parser_error (parser, "expected %<asm%>");
22164 cp_parser_error (parser, "expected %<try%>");
22167 cp_parser_error (parser, "expected %<catch%>");
22170 cp_parser_error (parser, "expected %<throw%>");
22173 cp_parser_error (parser, "expected %<__label__%>");
22176 cp_parser_error (parser, "expected %<@try%>");
22178 case RT_AT_SYNCHRONIZED:
22179 cp_parser_error (parser, "expected %<@synchronized%>");
22182 cp_parser_error (parser, "expected %<@throw%>");
22184 case RT_TRANSACTION_ATOMIC:
22185 cp_parser_error (parser, "expected %<__transaction_atomic%>");
22187 case RT_TRANSACTION_RELAXED:
22188 cp_parser_error (parser, "expected %<__transaction_relaxed%>");
22195 switch (token_desc)
22198 cp_parser_error (parser, "expected %<;%>");
22200 case RT_OPEN_PAREN:
22201 cp_parser_error (parser, "expected %<(%>");
22203 case RT_CLOSE_BRACE:
22204 cp_parser_error (parser, "expected %<}%>");
22206 case RT_OPEN_BRACE:
22207 cp_parser_error (parser, "expected %<{%>");
22209 case RT_CLOSE_SQUARE:
22210 cp_parser_error (parser, "expected %<]%>");
22212 case RT_OPEN_SQUARE:
22213 cp_parser_error (parser, "expected %<[%>");
22216 cp_parser_error (parser, "expected %<,%>");
22219 cp_parser_error (parser, "expected %<::%>");
22222 cp_parser_error (parser, "expected %<<%>");
22225 cp_parser_error (parser, "expected %<>%>");
22228 cp_parser_error (parser, "expected %<=%>");
22231 cp_parser_error (parser, "expected %<...%>");
22234 cp_parser_error (parser, "expected %<*%>");
22237 cp_parser_error (parser, "expected %<~%>");
22240 cp_parser_error (parser, "expected %<:%>");
22242 case RT_COLON_SCOPE:
22243 cp_parser_error (parser, "expected %<:%> or %<::%>");
22245 case RT_CLOSE_PAREN:
22246 cp_parser_error (parser, "expected %<)%>");
22248 case RT_COMMA_CLOSE_PAREN:
22249 cp_parser_error (parser, "expected %<,%> or %<)%>");
22251 case RT_PRAGMA_EOL:
22252 cp_parser_error (parser, "expected end of line");
22255 cp_parser_error (parser, "expected identifier");
22258 cp_parser_error (parser, "expected selection-statement");
22260 case RT_INTERATION:
22261 cp_parser_error (parser, "expected iteration-statement");
22264 cp_parser_error (parser, "expected jump-statement");
22267 cp_parser_error (parser, "expected class-key");
22269 case RT_CLASS_TYPENAME_TEMPLATE:
22270 cp_parser_error (parser,
22271 "expected %<class%>, %<typename%>, or %<template%>");
22274 gcc_unreachable ();
22278 gcc_unreachable ();
22283 /* If the next token is of the indicated TYPE, consume it. Otherwise,
22284 issue an error message indicating that TOKEN_DESC was expected.
22286 Returns the token consumed, if the token had the appropriate type.
22287 Otherwise, returns NULL. */
22290 cp_parser_require (cp_parser* parser,
22291 enum cpp_ttype type,
22292 required_token token_desc)
22294 if (cp_lexer_next_token_is (parser->lexer, type))
22295 return cp_lexer_consume_token (parser->lexer);
22298 /* Output the MESSAGE -- unless we're parsing tentatively. */
22299 if (!cp_parser_simulate_error (parser))
22300 cp_parser_required_error (parser, token_desc, /*keyword=*/false);
22305 /* An error message is produced if the next token is not '>'.
22306 All further tokens are skipped until the desired token is
22307 found or '{', '}', ';' or an unbalanced ')' or ']'. */
22310 cp_parser_skip_to_end_of_template_parameter_list (cp_parser* parser)
22312 /* Current level of '< ... >'. */
22313 unsigned level = 0;
22314 /* Ignore '<' and '>' nested inside '( ... )' or '[ ... ]'. */
22315 unsigned nesting_depth = 0;
22317 /* Are we ready, yet? If not, issue error message. */
22318 if (cp_parser_require (parser, CPP_GREATER, RT_GREATER))
22321 /* Skip tokens until the desired token is found. */
22324 /* Peek at the next token. */
22325 switch (cp_lexer_peek_token (parser->lexer)->type)
22328 if (!nesting_depth)
22333 if (cxx_dialect == cxx98)
22334 /* C++0x views the `>>' operator as two `>' tokens, but
22337 else if (!nesting_depth && level-- == 0)
22339 /* We've hit a `>>' where the first `>' closes the
22340 template argument list, and the second `>' is
22341 spurious. Just consume the `>>' and stop; we've
22342 already produced at least one error. */
22343 cp_lexer_consume_token (parser->lexer);
22346 /* Fall through for C++0x, so we handle the second `>' in
22350 if (!nesting_depth && level-- == 0)
22352 /* We've reached the token we want, consume it and stop. */
22353 cp_lexer_consume_token (parser->lexer);
22358 case CPP_OPEN_PAREN:
22359 case CPP_OPEN_SQUARE:
22363 case CPP_CLOSE_PAREN:
22364 case CPP_CLOSE_SQUARE:
22365 if (nesting_depth-- == 0)
22370 case CPP_PRAGMA_EOL:
22371 case CPP_SEMICOLON:
22372 case CPP_OPEN_BRACE:
22373 case CPP_CLOSE_BRACE:
22374 /* The '>' was probably forgotten, don't look further. */
22381 /* Consume this token. */
22382 cp_lexer_consume_token (parser->lexer);
22386 /* If the next token is the indicated keyword, consume it. Otherwise,
22387 issue an error message indicating that TOKEN_DESC was expected.
22389 Returns the token consumed, if the token had the appropriate type.
22390 Otherwise, returns NULL. */
22393 cp_parser_require_keyword (cp_parser* parser,
22395 required_token token_desc)
22397 cp_token *token = cp_parser_require (parser, CPP_KEYWORD, token_desc);
22399 if (token && token->keyword != keyword)
22401 cp_parser_required_error (parser, token_desc, /*keyword=*/true);
22408 /* Returns TRUE iff TOKEN is a token that can begin the body of a
22409 function-definition. */
22412 cp_parser_token_starts_function_definition_p (cp_token* token)
22414 return (/* An ordinary function-body begins with an `{'. */
22415 token->type == CPP_OPEN_BRACE
22416 /* A ctor-initializer begins with a `:'. */
22417 || token->type == CPP_COLON
22418 /* A function-try-block begins with `try'. */
22419 || token->keyword == RID_TRY
22420 /* A function-transaction-block begins with `__transaction_atomic'
22421 or `__transaction_relaxed'. */
22422 || token->keyword == RID_TRANSACTION_ATOMIC
22423 || token->keyword == RID_TRANSACTION_RELAXED
22424 /* The named return value extension begins with `return'. */
22425 || token->keyword == RID_RETURN);
22428 /* Returns TRUE iff the next token is the ":" or "{" beginning a class
22432 cp_parser_next_token_starts_class_definition_p (cp_parser *parser)
22436 token = cp_lexer_peek_token (parser->lexer);
22437 return (token->type == CPP_OPEN_BRACE || token->type == CPP_COLON);
22440 /* Returns TRUE iff the next token is the "," or ">" (or `>>', in
22441 C++0x) ending a template-argument. */
22444 cp_parser_next_token_ends_template_argument_p (cp_parser *parser)
22448 token = cp_lexer_peek_token (parser->lexer);
22449 return (token->type == CPP_COMMA
22450 || token->type == CPP_GREATER
22451 || token->type == CPP_ELLIPSIS
22452 || ((cxx_dialect != cxx98) && token->type == CPP_RSHIFT));
22455 /* Returns TRUE iff the n-th token is a "<", or the n-th is a "[" and the
22456 (n+1)-th is a ":" (which is a possible digraph typo for "< ::"). */
22459 cp_parser_nth_token_starts_template_argument_list_p (cp_parser * parser,
22464 token = cp_lexer_peek_nth_token (parser->lexer, n);
22465 if (token->type == CPP_LESS)
22467 /* Check for the sequence `<::' in the original code. It would be lexed as
22468 `[:', where `[' is a digraph, and there is no whitespace before
22470 if (token->type == CPP_OPEN_SQUARE && token->flags & DIGRAPH)
22473 token2 = cp_lexer_peek_nth_token (parser->lexer, n+1);
22474 if (token2->type == CPP_COLON && !(token2->flags & PREV_WHITE))
22480 /* Returns the kind of tag indicated by TOKEN, if it is a class-key,
22481 or none_type otherwise. */
22483 static enum tag_types
22484 cp_parser_token_is_class_key (cp_token* token)
22486 switch (token->keyword)
22491 return record_type;
22500 /* Issue an error message if the CLASS_KEY does not match the TYPE. */
22503 cp_parser_check_class_key (enum tag_types class_key, tree type)
22505 if (type == error_mark_node)
22507 if ((TREE_CODE (type) == UNION_TYPE) != (class_key == union_type))
22509 permerror (input_location, "%qs tag used in naming %q#T",
22510 class_key == union_type ? "union"
22511 : class_key == record_type ? "struct" : "class",
22513 inform (DECL_SOURCE_LOCATION (TYPE_NAME (type)),
22514 "%q#T was previously declared here", type);
22518 /* Issue an error message if DECL is redeclared with different
22519 access than its original declaration [class.access.spec/3].
22520 This applies to nested classes and nested class templates.
22524 cp_parser_check_access_in_redeclaration (tree decl, location_t location)
22526 if (!decl || !CLASS_TYPE_P (TREE_TYPE (decl)))
22529 if ((TREE_PRIVATE (decl)
22530 != (current_access_specifier == access_private_node))
22531 || (TREE_PROTECTED (decl)
22532 != (current_access_specifier == access_protected_node)))
22533 error_at (location, "%qD redeclared with different access", decl);
22536 /* Look for the `template' keyword, as a syntactic disambiguator.
22537 Return TRUE iff it is present, in which case it will be
22541 cp_parser_optional_template_keyword (cp_parser *parser)
22543 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
22545 /* The `template' keyword can only be used within templates;
22546 outside templates the parser can always figure out what is a
22547 template and what is not. */
22548 if (!processing_template_decl)
22550 cp_token *token = cp_lexer_peek_token (parser->lexer);
22551 error_at (token->location,
22552 "%<template%> (as a disambiguator) is only allowed "
22553 "within templates");
22554 /* If this part of the token stream is rescanned, the same
22555 error message would be generated. So, we purge the token
22556 from the stream. */
22557 cp_lexer_purge_token (parser->lexer);
22562 /* Consume the `template' keyword. */
22563 cp_lexer_consume_token (parser->lexer);
22571 /* The next token is a CPP_NESTED_NAME_SPECIFIER. Consume the token,
22572 set PARSER->SCOPE, and perform other related actions. */
22575 cp_parser_pre_parsed_nested_name_specifier (cp_parser *parser)
22578 struct tree_check *check_value;
22579 deferred_access_check *chk;
22580 VEC (deferred_access_check,gc) *checks;
22582 /* Get the stored value. */
22583 check_value = cp_lexer_consume_token (parser->lexer)->u.tree_check_value;
22584 /* Perform any access checks that were deferred. */
22585 checks = check_value->checks;
22588 FOR_EACH_VEC_ELT (deferred_access_check, checks, i, chk)
22589 perform_or_defer_access_check (chk->binfo,
22593 /* Set the scope from the stored value. */
22594 parser->scope = check_value->value;
22595 parser->qualifying_scope = check_value->qualifying_scope;
22596 parser->object_scope = NULL_TREE;
22599 /* Consume tokens up through a non-nested END token. Returns TRUE if we
22600 encounter the end of a block before what we were looking for. */
22603 cp_parser_cache_group (cp_parser *parser,
22604 enum cpp_ttype end,
22609 cp_token *token = cp_lexer_peek_token (parser->lexer);
22611 /* Abort a parenthesized expression if we encounter a semicolon. */
22612 if ((end == CPP_CLOSE_PAREN || depth == 0)
22613 && token->type == CPP_SEMICOLON)
22615 /* If we've reached the end of the file, stop. */
22616 if (token->type == CPP_EOF
22617 || (end != CPP_PRAGMA_EOL
22618 && token->type == CPP_PRAGMA_EOL))
22620 if (token->type == CPP_CLOSE_BRACE && depth == 0)
22621 /* We've hit the end of an enclosing block, so there's been some
22622 kind of syntax error. */
22625 /* Consume the token. */
22626 cp_lexer_consume_token (parser->lexer);
22627 /* See if it starts a new group. */
22628 if (token->type == CPP_OPEN_BRACE)
22630 cp_parser_cache_group (parser, CPP_CLOSE_BRACE, depth + 1);
22631 /* In theory this should probably check end == '}', but
22632 cp_parser_save_member_function_body needs it to exit
22633 after either '}' or ')' when called with ')'. */
22637 else if (token->type == CPP_OPEN_PAREN)
22639 cp_parser_cache_group (parser, CPP_CLOSE_PAREN, depth + 1);
22640 if (depth == 0 && end == CPP_CLOSE_PAREN)
22643 else if (token->type == CPP_PRAGMA)
22644 cp_parser_cache_group (parser, CPP_PRAGMA_EOL, depth + 1);
22645 else if (token->type == end)
22650 /* Like above, for caching a default argument or NSDMI. Both of these are
22651 terminated by a non-nested comma, but it can be unclear whether or not a
22652 comma is nested in a template argument list unless we do more parsing.
22653 In order to handle this ambiguity, when we encounter a ',' after a '<'
22654 we try to parse what follows as a parameter-declaration-list (in the
22655 case of a default argument) or a member-declarator (in the case of an
22656 NSDMI). If that succeeds, then we stop caching. */
22659 cp_parser_cache_defarg (cp_parser *parser, bool nsdmi)
22661 unsigned depth = 0;
22662 int maybe_template_id = 0;
22663 cp_token *first_token;
22665 tree default_argument;
22667 /* Add tokens until we have processed the entire default
22668 argument. We add the range [first_token, token). */
22669 first_token = cp_lexer_peek_token (parser->lexer);
22670 if (first_token->type == CPP_OPEN_BRACE)
22672 /* For list-initialization, this is straightforward. */
22673 cp_parser_cache_group (parser, CPP_CLOSE_BRACE, /*depth=*/0);
22674 token = cp_lexer_peek_token (parser->lexer);
22680 /* Peek at the next token. */
22681 token = cp_lexer_peek_token (parser->lexer);
22682 /* What we do depends on what token we have. */
22683 switch (token->type)
22685 /* In valid code, a default argument must be
22686 immediately followed by a `,' `)', or `...'. */
22688 if (depth == 0 && maybe_template_id)
22690 /* If we've seen a '<', we might be in a
22691 template-argument-list. Until Core issue 325 is
22692 resolved, we don't know how this situation ought
22693 to be handled, so try to DTRT. We check whether
22694 what comes after the comma is a valid parameter
22695 declaration list. If it is, then the comma ends
22696 the default argument; otherwise the default
22697 argument continues. */
22698 bool error = false;
22701 /* Set ITALP so cp_parser_parameter_declaration_list
22702 doesn't decide to commit to this parse. */
22703 bool saved_italp = parser->in_template_argument_list_p;
22704 parser->in_template_argument_list_p = true;
22706 cp_parser_parse_tentatively (parser);
22707 cp_lexer_consume_token (parser->lexer);
22711 int ctor_dtor_or_conv_p;
22712 cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
22713 &ctor_dtor_or_conv_p,
22714 /*parenthesized_p=*/NULL,
22715 /*member_p=*/true);
22719 begin_scope (sk_function_parms, NULL_TREE);
22720 cp_parser_parameter_declaration_list (parser, &error);
22721 for (t = current_binding_level->names; t; t = DECL_CHAIN (t))
22722 pop_binding (DECL_NAME (t), t);
22725 if (!cp_parser_error_occurred (parser) && !error)
22727 cp_parser_abort_tentative_parse (parser);
22729 parser->in_template_argument_list_p = saved_italp;
22732 case CPP_CLOSE_PAREN:
22734 /* If we run into a non-nested `;', `}', or `]',
22735 then the code is invalid -- but the default
22736 argument is certainly over. */
22737 case CPP_SEMICOLON:
22738 case CPP_CLOSE_BRACE:
22739 case CPP_CLOSE_SQUARE:
22742 /* Update DEPTH, if necessary. */
22743 else if (token->type == CPP_CLOSE_PAREN
22744 || token->type == CPP_CLOSE_BRACE
22745 || token->type == CPP_CLOSE_SQUARE)
22749 case CPP_OPEN_PAREN:
22750 case CPP_OPEN_SQUARE:
22751 case CPP_OPEN_BRACE:
22757 /* This might be the comparison operator, or it might
22758 start a template argument list. */
22759 ++maybe_template_id;
22763 if (cxx_dialect == cxx98)
22765 /* Fall through for C++0x, which treats the `>>'
22766 operator like two `>' tokens in certain
22772 /* This might be an operator, or it might close a
22773 template argument list. But if a previous '<'
22774 started a template argument list, this will have
22775 closed it, so we can't be in one anymore. */
22776 maybe_template_id -= 1 + (token->type == CPP_RSHIFT);
22777 if (maybe_template_id < 0)
22778 maybe_template_id = 0;
22782 /* If we run out of tokens, issue an error message. */
22784 case CPP_PRAGMA_EOL:
22785 error_at (token->location, "file ends in default argument");
22791 /* In these cases, we should look for template-ids.
22792 For example, if the default argument is
22793 `X<int, double>()', we need to do name lookup to
22794 figure out whether or not `X' is a template; if
22795 so, the `,' does not end the default argument.
22797 That is not yet done. */
22804 /* If we've reached the end, stop. */
22808 /* Add the token to the token block. */
22809 token = cp_lexer_consume_token (parser->lexer);
22812 /* Create a DEFAULT_ARG to represent the unparsed default
22814 default_argument = make_node (DEFAULT_ARG);
22815 DEFARG_TOKENS (default_argument)
22816 = cp_token_cache_new (first_token, token);
22817 DEFARG_INSTANTIATIONS (default_argument) = NULL;
22819 return default_argument;
22822 /* Begin parsing tentatively. We always save tokens while parsing
22823 tentatively so that if the tentative parsing fails we can restore the
22827 cp_parser_parse_tentatively (cp_parser* parser)
22829 /* Enter a new parsing context. */
22830 parser->context = cp_parser_context_new (parser->context);
22831 /* Begin saving tokens. */
22832 cp_lexer_save_tokens (parser->lexer);
22833 /* In order to avoid repetitive access control error messages,
22834 access checks are queued up until we are no longer parsing
22836 push_deferring_access_checks (dk_deferred);
22839 /* Commit to the currently active tentative parse. */
22842 cp_parser_commit_to_tentative_parse (cp_parser* parser)
22844 cp_parser_context *context;
22847 /* Mark all of the levels as committed. */
22848 lexer = parser->lexer;
22849 for (context = parser->context; context->next; context = context->next)
22851 if (context->status == CP_PARSER_STATUS_KIND_COMMITTED)
22853 context->status = CP_PARSER_STATUS_KIND_COMMITTED;
22854 while (!cp_lexer_saving_tokens (lexer))
22855 lexer = lexer->next;
22856 cp_lexer_commit_tokens (lexer);
22860 /* Abort the currently active tentative parse. All consumed tokens
22861 will be rolled back, and no diagnostics will be issued. */
22864 cp_parser_abort_tentative_parse (cp_parser* parser)
22866 gcc_assert (parser->context->status != CP_PARSER_STATUS_KIND_COMMITTED
22867 || errorcount > 0);
22868 cp_parser_simulate_error (parser);
22869 /* Now, pretend that we want to see if the construct was
22870 successfully parsed. */
22871 cp_parser_parse_definitely (parser);
22874 /* Stop parsing tentatively. If a parse error has occurred, restore the
22875 token stream. Otherwise, commit to the tokens we have consumed.
22876 Returns true if no error occurred; false otherwise. */
22879 cp_parser_parse_definitely (cp_parser* parser)
22881 bool error_occurred;
22882 cp_parser_context *context;
22884 /* Remember whether or not an error occurred, since we are about to
22885 destroy that information. */
22886 error_occurred = cp_parser_error_occurred (parser);
22887 /* Remove the topmost context from the stack. */
22888 context = parser->context;
22889 parser->context = context->next;
22890 /* If no parse errors occurred, commit to the tentative parse. */
22891 if (!error_occurred)
22893 /* Commit to the tokens read tentatively, unless that was
22895 if (context->status != CP_PARSER_STATUS_KIND_COMMITTED)
22896 cp_lexer_commit_tokens (parser->lexer);
22898 pop_to_parent_deferring_access_checks ();
22900 /* Otherwise, if errors occurred, roll back our state so that things
22901 are just as they were before we began the tentative parse. */
22904 cp_lexer_rollback_tokens (parser->lexer);
22905 pop_deferring_access_checks ();
22907 /* Add the context to the front of the free list. */
22908 context->next = cp_parser_context_free_list;
22909 cp_parser_context_free_list = context;
22911 return !error_occurred;
22914 /* Returns true if we are parsing tentatively and are not committed to
22915 this tentative parse. */
22918 cp_parser_uncommitted_to_tentative_parse_p (cp_parser* parser)
22920 return (cp_parser_parsing_tentatively (parser)
22921 && parser->context->status != CP_PARSER_STATUS_KIND_COMMITTED);
22924 /* Returns nonzero iff an error has occurred during the most recent
22925 tentative parse. */
22928 cp_parser_error_occurred (cp_parser* parser)
22930 return (cp_parser_parsing_tentatively (parser)
22931 && parser->context->status == CP_PARSER_STATUS_KIND_ERROR);
22934 /* Returns nonzero if GNU extensions are allowed. */
22937 cp_parser_allow_gnu_extensions_p (cp_parser* parser)
22939 return parser->allow_gnu_extensions_p;
22942 /* Objective-C++ Productions */
22945 /* Parse an Objective-C expression, which feeds into a primary-expression
22949 objc-message-expression
22950 objc-string-literal
22951 objc-encode-expression
22952 objc-protocol-expression
22953 objc-selector-expression
22955 Returns a tree representation of the expression. */
22958 cp_parser_objc_expression (cp_parser* parser)
22960 /* Try to figure out what kind of declaration is present. */
22961 cp_token *kwd = cp_lexer_peek_token (parser->lexer);
22965 case CPP_OPEN_SQUARE:
22966 return cp_parser_objc_message_expression (parser);
22968 case CPP_OBJC_STRING:
22969 kwd = cp_lexer_consume_token (parser->lexer);
22970 return objc_build_string_object (kwd->u.value);
22973 switch (kwd->keyword)
22975 case RID_AT_ENCODE:
22976 return cp_parser_objc_encode_expression (parser);
22978 case RID_AT_PROTOCOL:
22979 return cp_parser_objc_protocol_expression (parser);
22981 case RID_AT_SELECTOR:
22982 return cp_parser_objc_selector_expression (parser);
22988 error_at (kwd->location,
22989 "misplaced %<@%D%> Objective-C++ construct",
22991 cp_parser_skip_to_end_of_block_or_statement (parser);
22994 return error_mark_node;
22997 /* Parse an Objective-C message expression.
22999 objc-message-expression:
23000 [ objc-message-receiver objc-message-args ]
23002 Returns a representation of an Objective-C message. */
23005 cp_parser_objc_message_expression (cp_parser* parser)
23007 tree receiver, messageargs;
23009 cp_lexer_consume_token (parser->lexer); /* Eat '['. */
23010 receiver = cp_parser_objc_message_receiver (parser);
23011 messageargs = cp_parser_objc_message_args (parser);
23012 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
23014 return objc_build_message_expr (receiver, messageargs);
23017 /* Parse an objc-message-receiver.
23019 objc-message-receiver:
23021 simple-type-specifier
23023 Returns a representation of the type or expression. */
23026 cp_parser_objc_message_receiver (cp_parser* parser)
23030 /* An Objective-C message receiver may be either (1) a type
23031 or (2) an expression. */
23032 cp_parser_parse_tentatively (parser);
23033 rcv = cp_parser_expression (parser, false, NULL);
23035 if (cp_parser_parse_definitely (parser))
23038 rcv = cp_parser_simple_type_specifier (parser,
23039 /*decl_specs=*/NULL,
23040 CP_PARSER_FLAGS_NONE);
23042 return objc_get_class_reference (rcv);
23045 /* Parse the arguments and selectors comprising an Objective-C message.
23050 objc-selector-args , objc-comma-args
23052 objc-selector-args:
23053 objc-selector [opt] : assignment-expression
23054 objc-selector-args objc-selector [opt] : assignment-expression
23057 assignment-expression
23058 objc-comma-args , assignment-expression
23060 Returns a TREE_LIST, with TREE_PURPOSE containing a list of
23061 selector arguments and TREE_VALUE containing a list of comma
23065 cp_parser_objc_message_args (cp_parser* parser)
23067 tree sel_args = NULL_TREE, addl_args = NULL_TREE;
23068 bool maybe_unary_selector_p = true;
23069 cp_token *token = cp_lexer_peek_token (parser->lexer);
23071 while (cp_parser_objc_selector_p (token->type) || token->type == CPP_COLON)
23073 tree selector = NULL_TREE, arg;
23075 if (token->type != CPP_COLON)
23076 selector = cp_parser_objc_selector (parser);
23078 /* Detect if we have a unary selector. */
23079 if (maybe_unary_selector_p
23080 && cp_lexer_next_token_is_not (parser->lexer, CPP_COLON))
23081 return build_tree_list (selector, NULL_TREE);
23083 maybe_unary_selector_p = false;
23084 cp_parser_require (parser, CPP_COLON, RT_COLON);
23085 arg = cp_parser_assignment_expression (parser, false, NULL);
23088 = chainon (sel_args,
23089 build_tree_list (selector, arg));
23091 token = cp_lexer_peek_token (parser->lexer);
23094 /* Handle non-selector arguments, if any. */
23095 while (token->type == CPP_COMMA)
23099 cp_lexer_consume_token (parser->lexer);
23100 arg = cp_parser_assignment_expression (parser, false, NULL);
23103 = chainon (addl_args,
23104 build_tree_list (NULL_TREE, arg));
23106 token = cp_lexer_peek_token (parser->lexer);
23109 if (sel_args == NULL_TREE && addl_args == NULL_TREE)
23111 cp_parser_error (parser, "objective-c++ message argument(s) are expected");
23112 return build_tree_list (error_mark_node, error_mark_node);
23115 return build_tree_list (sel_args, addl_args);
23118 /* Parse an Objective-C encode expression.
23120 objc-encode-expression:
23121 @encode objc-typename
23123 Returns an encoded representation of the type argument. */
23126 cp_parser_objc_encode_expression (cp_parser* parser)
23131 cp_lexer_consume_token (parser->lexer); /* Eat '@encode'. */
23132 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
23133 token = cp_lexer_peek_token (parser->lexer);
23134 type = complete_type (cp_parser_type_id (parser));
23135 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
23139 error_at (token->location,
23140 "%<@encode%> must specify a type as an argument");
23141 return error_mark_node;
23144 /* This happens if we find @encode(T) (where T is a template
23145 typename or something dependent on a template typename) when
23146 parsing a template. In that case, we can't compile it
23147 immediately, but we rather create an AT_ENCODE_EXPR which will
23148 need to be instantiated when the template is used.
23150 if (dependent_type_p (type))
23152 tree value = build_min (AT_ENCODE_EXPR, size_type_node, type);
23153 TREE_READONLY (value) = 1;
23157 return objc_build_encode_expr (type);
23160 /* Parse an Objective-C @defs expression. */
23163 cp_parser_objc_defs_expression (cp_parser *parser)
23167 cp_lexer_consume_token (parser->lexer); /* Eat '@defs'. */
23168 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
23169 name = cp_parser_identifier (parser);
23170 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
23172 return objc_get_class_ivars (name);
23175 /* Parse an Objective-C protocol expression.
23177 objc-protocol-expression:
23178 @protocol ( identifier )
23180 Returns a representation of the protocol expression. */
23183 cp_parser_objc_protocol_expression (cp_parser* parser)
23187 cp_lexer_consume_token (parser->lexer); /* Eat '@protocol'. */
23188 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
23189 proto = cp_parser_identifier (parser);
23190 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
23192 return objc_build_protocol_expr (proto);
23195 /* Parse an Objective-C selector expression.
23197 objc-selector-expression:
23198 @selector ( objc-method-signature )
23200 objc-method-signature:
23206 objc-selector-seq objc-selector :
23208 Returns a representation of the method selector. */
23211 cp_parser_objc_selector_expression (cp_parser* parser)
23213 tree sel_seq = NULL_TREE;
23214 bool maybe_unary_selector_p = true;
23216 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
23218 cp_lexer_consume_token (parser->lexer); /* Eat '@selector'. */
23219 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
23220 token = cp_lexer_peek_token (parser->lexer);
23222 while (cp_parser_objc_selector_p (token->type) || token->type == CPP_COLON
23223 || token->type == CPP_SCOPE)
23225 tree selector = NULL_TREE;
23227 if (token->type != CPP_COLON
23228 || token->type == CPP_SCOPE)
23229 selector = cp_parser_objc_selector (parser);
23231 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COLON)
23232 && cp_lexer_next_token_is_not (parser->lexer, CPP_SCOPE))
23234 /* Detect if we have a unary selector. */
23235 if (maybe_unary_selector_p)
23237 sel_seq = selector;
23238 goto finish_selector;
23242 cp_parser_error (parser, "expected %<:%>");
23245 maybe_unary_selector_p = false;
23246 token = cp_lexer_consume_token (parser->lexer);
23248 if (token->type == CPP_SCOPE)
23251 = chainon (sel_seq,
23252 build_tree_list (selector, NULL_TREE));
23254 = chainon (sel_seq,
23255 build_tree_list (NULL_TREE, NULL_TREE));
23259 = chainon (sel_seq,
23260 build_tree_list (selector, NULL_TREE));
23262 token = cp_lexer_peek_token (parser->lexer);
23266 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
23268 return objc_build_selector_expr (loc, sel_seq);
23271 /* Parse a list of identifiers.
23273 objc-identifier-list:
23275 objc-identifier-list , identifier
23277 Returns a TREE_LIST of identifier nodes. */
23280 cp_parser_objc_identifier_list (cp_parser* parser)
23286 identifier = cp_parser_identifier (parser);
23287 if (identifier == error_mark_node)
23288 return error_mark_node;
23290 list = build_tree_list (NULL_TREE, identifier);
23291 sep = cp_lexer_peek_token (parser->lexer);
23293 while (sep->type == CPP_COMMA)
23295 cp_lexer_consume_token (parser->lexer); /* Eat ','. */
23296 identifier = cp_parser_identifier (parser);
23297 if (identifier == error_mark_node)
23300 list = chainon (list, build_tree_list (NULL_TREE,
23302 sep = cp_lexer_peek_token (parser->lexer);
23308 /* Parse an Objective-C alias declaration.
23310 objc-alias-declaration:
23311 @compatibility_alias identifier identifier ;
23313 This function registers the alias mapping with the Objective-C front end.
23314 It returns nothing. */
23317 cp_parser_objc_alias_declaration (cp_parser* parser)
23321 cp_lexer_consume_token (parser->lexer); /* Eat '@compatibility_alias'. */
23322 alias = cp_parser_identifier (parser);
23323 orig = cp_parser_identifier (parser);
23324 objc_declare_alias (alias, orig);
23325 cp_parser_consume_semicolon_at_end_of_statement (parser);
23328 /* Parse an Objective-C class forward-declaration.
23330 objc-class-declaration:
23331 @class objc-identifier-list ;
23333 The function registers the forward declarations with the Objective-C
23334 front end. It returns nothing. */
23337 cp_parser_objc_class_declaration (cp_parser* parser)
23339 cp_lexer_consume_token (parser->lexer); /* Eat '@class'. */
23344 id = cp_parser_identifier (parser);
23345 if (id == error_mark_node)
23348 objc_declare_class (id);
23350 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
23351 cp_lexer_consume_token (parser->lexer);
23355 cp_parser_consume_semicolon_at_end_of_statement (parser);
23358 /* Parse a list of Objective-C protocol references.
23360 objc-protocol-refs-opt:
23361 objc-protocol-refs [opt]
23363 objc-protocol-refs:
23364 < objc-identifier-list >
23366 Returns a TREE_LIST of identifiers, if any. */
23369 cp_parser_objc_protocol_refs_opt (cp_parser* parser)
23371 tree protorefs = NULL_TREE;
23373 if(cp_lexer_next_token_is (parser->lexer, CPP_LESS))
23375 cp_lexer_consume_token (parser->lexer); /* Eat '<'. */
23376 protorefs = cp_parser_objc_identifier_list (parser);
23377 cp_parser_require (parser, CPP_GREATER, RT_GREATER);
23383 /* Parse a Objective-C visibility specification. */
23386 cp_parser_objc_visibility_spec (cp_parser* parser)
23388 cp_token *vis = cp_lexer_peek_token (parser->lexer);
23390 switch (vis->keyword)
23392 case RID_AT_PRIVATE:
23393 objc_set_visibility (OBJC_IVAR_VIS_PRIVATE);
23395 case RID_AT_PROTECTED:
23396 objc_set_visibility (OBJC_IVAR_VIS_PROTECTED);
23398 case RID_AT_PUBLIC:
23399 objc_set_visibility (OBJC_IVAR_VIS_PUBLIC);
23401 case RID_AT_PACKAGE:
23402 objc_set_visibility (OBJC_IVAR_VIS_PACKAGE);
23408 /* Eat '@private'/'@protected'/'@public'. */
23409 cp_lexer_consume_token (parser->lexer);
23412 /* Parse an Objective-C method type. Return 'true' if it is a class
23413 (+) method, and 'false' if it is an instance (-) method. */
23416 cp_parser_objc_method_type (cp_parser* parser)
23418 if (cp_lexer_consume_token (parser->lexer)->type == CPP_PLUS)
23424 /* Parse an Objective-C protocol qualifier. */
23427 cp_parser_objc_protocol_qualifiers (cp_parser* parser)
23429 tree quals = NULL_TREE, node;
23430 cp_token *token = cp_lexer_peek_token (parser->lexer);
23432 node = token->u.value;
23434 while (node && TREE_CODE (node) == IDENTIFIER_NODE
23435 && (node == ridpointers [(int) RID_IN]
23436 || node == ridpointers [(int) RID_OUT]
23437 || node == ridpointers [(int) RID_INOUT]
23438 || node == ridpointers [(int) RID_BYCOPY]
23439 || node == ridpointers [(int) RID_BYREF]
23440 || node == ridpointers [(int) RID_ONEWAY]))
23442 quals = tree_cons (NULL_TREE, node, quals);
23443 cp_lexer_consume_token (parser->lexer);
23444 token = cp_lexer_peek_token (parser->lexer);
23445 node = token->u.value;
23451 /* Parse an Objective-C typename. */
23454 cp_parser_objc_typename (cp_parser* parser)
23456 tree type_name = NULL_TREE;
23458 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
23460 tree proto_quals, cp_type = NULL_TREE;
23462 cp_lexer_consume_token (parser->lexer); /* Eat '('. */
23463 proto_quals = cp_parser_objc_protocol_qualifiers (parser);
23465 /* An ObjC type name may consist of just protocol qualifiers, in which
23466 case the type shall default to 'id'. */
23467 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN))
23469 cp_type = cp_parser_type_id (parser);
23471 /* If the type could not be parsed, an error has already
23472 been produced. For error recovery, behave as if it had
23473 not been specified, which will use the default type
23475 if (cp_type == error_mark_node)
23477 cp_type = NULL_TREE;
23478 /* We need to skip to the closing parenthesis as
23479 cp_parser_type_id() does not seem to do it for
23481 cp_parser_skip_to_closing_parenthesis (parser,
23482 /*recovering=*/true,
23483 /*or_comma=*/false,
23484 /*consume_paren=*/false);
23488 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
23489 type_name = build_tree_list (proto_quals, cp_type);
23495 /* Check to see if TYPE refers to an Objective-C selector name. */
23498 cp_parser_objc_selector_p (enum cpp_ttype type)
23500 return (type == CPP_NAME || type == CPP_KEYWORD
23501 || type == CPP_AND_AND || type == CPP_AND_EQ || type == CPP_AND
23502 || type == CPP_OR || type == CPP_COMPL || type == CPP_NOT
23503 || type == CPP_NOT_EQ || type == CPP_OR_OR || type == CPP_OR_EQ
23504 || type == CPP_XOR || type == CPP_XOR_EQ);
23507 /* Parse an Objective-C selector. */
23510 cp_parser_objc_selector (cp_parser* parser)
23512 cp_token *token = cp_lexer_consume_token (parser->lexer);
23514 if (!cp_parser_objc_selector_p (token->type))
23516 error_at (token->location, "invalid Objective-C++ selector name");
23517 return error_mark_node;
23520 /* C++ operator names are allowed to appear in ObjC selectors. */
23521 switch (token->type)
23523 case CPP_AND_AND: return get_identifier ("and");
23524 case CPP_AND_EQ: return get_identifier ("and_eq");
23525 case CPP_AND: return get_identifier ("bitand");
23526 case CPP_OR: return get_identifier ("bitor");
23527 case CPP_COMPL: return get_identifier ("compl");
23528 case CPP_NOT: return get_identifier ("not");
23529 case CPP_NOT_EQ: return get_identifier ("not_eq");
23530 case CPP_OR_OR: return get_identifier ("or");
23531 case CPP_OR_EQ: return get_identifier ("or_eq");
23532 case CPP_XOR: return get_identifier ("xor");
23533 case CPP_XOR_EQ: return get_identifier ("xor_eq");
23534 default: return token->u.value;
23538 /* Parse an Objective-C params list. */
23541 cp_parser_objc_method_keyword_params (cp_parser* parser, tree* attributes)
23543 tree params = NULL_TREE;
23544 bool maybe_unary_selector_p = true;
23545 cp_token *token = cp_lexer_peek_token (parser->lexer);
23547 while (cp_parser_objc_selector_p (token->type) || token->type == CPP_COLON)
23549 tree selector = NULL_TREE, type_name, identifier;
23550 tree parm_attr = NULL_TREE;
23552 if (token->keyword == RID_ATTRIBUTE)
23555 if (token->type != CPP_COLON)
23556 selector = cp_parser_objc_selector (parser);
23558 /* Detect if we have a unary selector. */
23559 if (maybe_unary_selector_p
23560 && cp_lexer_next_token_is_not (parser->lexer, CPP_COLON))
23562 params = selector; /* Might be followed by attributes. */
23566 maybe_unary_selector_p = false;
23567 if (!cp_parser_require (parser, CPP_COLON, RT_COLON))
23569 /* Something went quite wrong. There should be a colon
23570 here, but there is not. Stop parsing parameters. */
23573 type_name = cp_parser_objc_typename (parser);
23574 /* New ObjC allows attributes on parameters too. */
23575 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_ATTRIBUTE))
23576 parm_attr = cp_parser_attributes_opt (parser);
23577 identifier = cp_parser_identifier (parser);
23581 objc_build_keyword_decl (selector,
23586 token = cp_lexer_peek_token (parser->lexer);
23589 if (params == NULL_TREE)
23591 cp_parser_error (parser, "objective-c++ method declaration is expected");
23592 return error_mark_node;
23595 /* We allow tail attributes for the method. */
23596 if (token->keyword == RID_ATTRIBUTE)
23598 *attributes = cp_parser_attributes_opt (parser);
23599 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)
23600 || cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
23602 cp_parser_error (parser,
23603 "method attributes must be specified at the end");
23604 return error_mark_node;
23607 if (params == NULL_TREE)
23609 cp_parser_error (parser, "objective-c++ method declaration is expected");
23610 return error_mark_node;
23615 /* Parse the non-keyword Objective-C params. */
23618 cp_parser_objc_method_tail_params_opt (cp_parser* parser, bool *ellipsisp,
23621 tree params = make_node (TREE_LIST);
23622 cp_token *token = cp_lexer_peek_token (parser->lexer);
23623 *ellipsisp = false; /* Initially, assume no ellipsis. */
23625 while (token->type == CPP_COMMA)
23627 cp_parameter_declarator *parmdecl;
23630 cp_lexer_consume_token (parser->lexer); /* Eat ','. */
23631 token = cp_lexer_peek_token (parser->lexer);
23633 if (token->type == CPP_ELLIPSIS)
23635 cp_lexer_consume_token (parser->lexer); /* Eat '...'. */
23637 token = cp_lexer_peek_token (parser->lexer);
23641 /* TODO: parse attributes for tail parameters. */
23642 parmdecl = cp_parser_parameter_declaration (parser, false, NULL);
23643 parm = grokdeclarator (parmdecl->declarator,
23644 &parmdecl->decl_specifiers,
23645 PARM, /*initialized=*/0,
23646 /*attrlist=*/NULL);
23648 chainon (params, build_tree_list (NULL_TREE, parm));
23649 token = cp_lexer_peek_token (parser->lexer);
23652 /* We allow tail attributes for the method. */
23653 if (token->keyword == RID_ATTRIBUTE)
23655 if (*attributes == NULL_TREE)
23657 *attributes = cp_parser_attributes_opt (parser);
23658 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)
23659 || cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
23663 /* We have an error, but parse the attributes, so that we can
23665 *attributes = cp_parser_attributes_opt (parser);
23667 cp_parser_error (parser,
23668 "method attributes must be specified at the end");
23669 return error_mark_node;
23675 /* Parse a linkage specification, a pragma, an extra semicolon or a block. */
23678 cp_parser_objc_interstitial_code (cp_parser* parser)
23680 cp_token *token = cp_lexer_peek_token (parser->lexer);
23682 /* If the next token is `extern' and the following token is a string
23683 literal, then we have a linkage specification. */
23684 if (token->keyword == RID_EXTERN
23685 && cp_parser_is_pure_string_literal
23686 (cp_lexer_peek_nth_token (parser->lexer, 2)))
23687 cp_parser_linkage_specification (parser);
23688 /* Handle #pragma, if any. */
23689 else if (token->type == CPP_PRAGMA)
23690 cp_parser_pragma (parser, pragma_external);
23691 /* Allow stray semicolons. */
23692 else if (token->type == CPP_SEMICOLON)
23693 cp_lexer_consume_token (parser->lexer);
23694 /* Mark methods as optional or required, when building protocols. */
23695 else if (token->keyword == RID_AT_OPTIONAL)
23697 cp_lexer_consume_token (parser->lexer);
23698 objc_set_method_opt (true);
23700 else if (token->keyword == RID_AT_REQUIRED)
23702 cp_lexer_consume_token (parser->lexer);
23703 objc_set_method_opt (false);
23705 else if (token->keyword == RID_NAMESPACE)
23706 cp_parser_namespace_definition (parser);
23707 /* Other stray characters must generate errors. */
23708 else if (token->type == CPP_OPEN_BRACE || token->type == CPP_CLOSE_BRACE)
23710 cp_lexer_consume_token (parser->lexer);
23711 error ("stray %qs between Objective-C++ methods",
23712 token->type == CPP_OPEN_BRACE ? "{" : "}");
23714 /* Finally, try to parse a block-declaration, or a function-definition. */
23716 cp_parser_block_declaration (parser, /*statement_p=*/false);
23719 /* Parse a method signature. */
23722 cp_parser_objc_method_signature (cp_parser* parser, tree* attributes)
23724 tree rettype, kwdparms, optparms;
23725 bool ellipsis = false;
23726 bool is_class_method;
23728 is_class_method = cp_parser_objc_method_type (parser);
23729 rettype = cp_parser_objc_typename (parser);
23730 *attributes = NULL_TREE;
23731 kwdparms = cp_parser_objc_method_keyword_params (parser, attributes);
23732 if (kwdparms == error_mark_node)
23733 return error_mark_node;
23734 optparms = cp_parser_objc_method_tail_params_opt (parser, &ellipsis, attributes);
23735 if (optparms == error_mark_node)
23736 return error_mark_node;
23738 return objc_build_method_signature (is_class_method, rettype, kwdparms, optparms, ellipsis);
23742 cp_parser_objc_method_maybe_bad_prefix_attributes (cp_parser* parser)
23745 cp_lexer_save_tokens (parser->lexer);
23746 tattr = cp_parser_attributes_opt (parser);
23747 gcc_assert (tattr) ;
23749 /* If the attributes are followed by a method introducer, this is not allowed.
23750 Dump the attributes and flag the situation. */
23751 if (cp_lexer_next_token_is (parser->lexer, CPP_PLUS)
23752 || cp_lexer_next_token_is (parser->lexer, CPP_MINUS))
23755 /* Otherwise, the attributes introduce some interstitial code, possibly so
23756 rewind to allow that check. */
23757 cp_lexer_rollback_tokens (parser->lexer);
23761 /* Parse an Objective-C method prototype list. */
23764 cp_parser_objc_method_prototype_list (cp_parser* parser)
23766 cp_token *token = cp_lexer_peek_token (parser->lexer);
23768 while (token->keyword != RID_AT_END && token->type != CPP_EOF)
23770 if (token->type == CPP_PLUS || token->type == CPP_MINUS)
23772 tree attributes, sig;
23773 bool is_class_method;
23774 if (token->type == CPP_PLUS)
23775 is_class_method = true;
23777 is_class_method = false;
23778 sig = cp_parser_objc_method_signature (parser, &attributes);
23779 if (sig == error_mark_node)
23781 cp_parser_skip_to_end_of_block_or_statement (parser);
23782 token = cp_lexer_peek_token (parser->lexer);
23785 objc_add_method_declaration (is_class_method, sig, attributes);
23786 cp_parser_consume_semicolon_at_end_of_statement (parser);
23788 else if (token->keyword == RID_AT_PROPERTY)
23789 cp_parser_objc_at_property_declaration (parser);
23790 else if (token->keyword == RID_ATTRIBUTE
23791 && cp_parser_objc_method_maybe_bad_prefix_attributes(parser))
23792 warning_at (cp_lexer_peek_token (parser->lexer)->location,
23794 "prefix attributes are ignored for methods");
23796 /* Allow for interspersed non-ObjC++ code. */
23797 cp_parser_objc_interstitial_code (parser);
23799 token = cp_lexer_peek_token (parser->lexer);
23802 if (token->type != CPP_EOF)
23803 cp_lexer_consume_token (parser->lexer); /* Eat '@end'. */
23805 cp_parser_error (parser, "expected %<@end%>");
23807 objc_finish_interface ();
23810 /* Parse an Objective-C method definition list. */
23813 cp_parser_objc_method_definition_list (cp_parser* parser)
23815 cp_token *token = cp_lexer_peek_token (parser->lexer);
23817 while (token->keyword != RID_AT_END && token->type != CPP_EOF)
23821 if (token->type == CPP_PLUS || token->type == CPP_MINUS)
23824 tree sig, attribute;
23825 bool is_class_method;
23826 if (token->type == CPP_PLUS)
23827 is_class_method = true;
23829 is_class_method = false;
23830 push_deferring_access_checks (dk_deferred);
23831 sig = cp_parser_objc_method_signature (parser, &attribute);
23832 if (sig == error_mark_node)
23834 cp_parser_skip_to_end_of_block_or_statement (parser);
23835 token = cp_lexer_peek_token (parser->lexer);
23838 objc_start_method_definition (is_class_method, sig, attribute,
23841 /* For historical reasons, we accept an optional semicolon. */
23842 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
23843 cp_lexer_consume_token (parser->lexer);
23845 ptk = cp_lexer_peek_token (parser->lexer);
23846 if (!(ptk->type == CPP_PLUS || ptk->type == CPP_MINUS
23847 || ptk->type == CPP_EOF || ptk->keyword == RID_AT_END))
23849 perform_deferred_access_checks ();
23850 stop_deferring_access_checks ();
23851 meth = cp_parser_function_definition_after_declarator (parser,
23853 pop_deferring_access_checks ();
23854 objc_finish_method_definition (meth);
23857 /* The following case will be removed once @synthesize is
23858 completely implemented. */
23859 else if (token->keyword == RID_AT_PROPERTY)
23860 cp_parser_objc_at_property_declaration (parser);
23861 else if (token->keyword == RID_AT_SYNTHESIZE)
23862 cp_parser_objc_at_synthesize_declaration (parser);
23863 else if (token->keyword == RID_AT_DYNAMIC)
23864 cp_parser_objc_at_dynamic_declaration (parser);
23865 else if (token->keyword == RID_ATTRIBUTE
23866 && cp_parser_objc_method_maybe_bad_prefix_attributes(parser))
23867 warning_at (token->location, OPT_Wattributes,
23868 "prefix attributes are ignored for methods");
23870 /* Allow for interspersed non-ObjC++ code. */
23871 cp_parser_objc_interstitial_code (parser);
23873 token = cp_lexer_peek_token (parser->lexer);
23876 if (token->type != CPP_EOF)
23877 cp_lexer_consume_token (parser->lexer); /* Eat '@end'. */
23879 cp_parser_error (parser, "expected %<@end%>");
23881 objc_finish_implementation ();
23884 /* Parse Objective-C ivars. */
23887 cp_parser_objc_class_ivars (cp_parser* parser)
23889 cp_token *token = cp_lexer_peek_token (parser->lexer);
23891 if (token->type != CPP_OPEN_BRACE)
23892 return; /* No ivars specified. */
23894 cp_lexer_consume_token (parser->lexer); /* Eat '{'. */
23895 token = cp_lexer_peek_token (parser->lexer);
23897 while (token->type != CPP_CLOSE_BRACE
23898 && token->keyword != RID_AT_END && token->type != CPP_EOF)
23900 cp_decl_specifier_seq declspecs;
23901 int decl_class_or_enum_p;
23902 tree prefix_attributes;
23904 cp_parser_objc_visibility_spec (parser);
23906 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
23909 cp_parser_decl_specifier_seq (parser,
23910 CP_PARSER_FLAGS_OPTIONAL,
23912 &decl_class_or_enum_p);
23914 /* auto, register, static, extern, mutable. */
23915 if (declspecs.storage_class != sc_none)
23917 cp_parser_error (parser, "invalid type for instance variable");
23918 declspecs.storage_class = sc_none;
23922 if (declspecs.specs[(int) ds_thread])
23924 cp_parser_error (parser, "invalid type for instance variable");
23925 declspecs.specs[(int) ds_thread] = 0;
23929 if (declspecs.specs[(int) ds_typedef])
23931 cp_parser_error (parser, "invalid type for instance variable");
23932 declspecs.specs[(int) ds_typedef] = 0;
23935 prefix_attributes = declspecs.attributes;
23936 declspecs.attributes = NULL_TREE;
23938 /* Keep going until we hit the `;' at the end of the
23940 while (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
23942 tree width = NULL_TREE, attributes, first_attribute, decl;
23943 cp_declarator *declarator = NULL;
23944 int ctor_dtor_or_conv_p;
23946 /* Check for a (possibly unnamed) bitfield declaration. */
23947 token = cp_lexer_peek_token (parser->lexer);
23948 if (token->type == CPP_COLON)
23951 if (token->type == CPP_NAME
23952 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
23955 /* Get the name of the bitfield. */
23956 declarator = make_id_declarator (NULL_TREE,
23957 cp_parser_identifier (parser),
23961 cp_lexer_consume_token (parser->lexer); /* Eat ':'. */
23962 /* Get the width of the bitfield. */
23964 = cp_parser_constant_expression (parser,
23965 /*allow_non_constant=*/false,
23970 /* Parse the declarator. */
23972 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
23973 &ctor_dtor_or_conv_p,
23974 /*parenthesized_p=*/NULL,
23975 /*member_p=*/false);
23978 /* Look for attributes that apply to the ivar. */
23979 attributes = cp_parser_attributes_opt (parser);
23980 /* Remember which attributes are prefix attributes and
23982 first_attribute = attributes;
23983 /* Combine the attributes. */
23984 attributes = chainon (prefix_attributes, attributes);
23987 /* Create the bitfield declaration. */
23988 decl = grokbitfield (declarator, &declspecs,
23992 decl = grokfield (declarator, &declspecs,
23993 NULL_TREE, /*init_const_expr_p=*/false,
23994 NULL_TREE, attributes);
23996 /* Add the instance variable. */
23997 if (decl != error_mark_node && decl != NULL_TREE)
23998 objc_add_instance_variable (decl);
24000 /* Reset PREFIX_ATTRIBUTES. */
24001 while (attributes && TREE_CHAIN (attributes) != first_attribute)
24002 attributes = TREE_CHAIN (attributes);
24004 TREE_CHAIN (attributes) = NULL_TREE;
24006 token = cp_lexer_peek_token (parser->lexer);
24008 if (token->type == CPP_COMMA)
24010 cp_lexer_consume_token (parser->lexer); /* Eat ','. */
24016 cp_parser_consume_semicolon_at_end_of_statement (parser);
24017 token = cp_lexer_peek_token (parser->lexer);
24020 if (token->keyword == RID_AT_END)
24021 cp_parser_error (parser, "expected %<}%>");
24023 /* Do not consume the RID_AT_END, so it will be read again as terminating
24024 the @interface of @implementation. */
24025 if (token->keyword != RID_AT_END && token->type != CPP_EOF)
24026 cp_lexer_consume_token (parser->lexer); /* Eat '}'. */
24028 /* For historical reasons, we accept an optional semicolon. */
24029 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
24030 cp_lexer_consume_token (parser->lexer);
24033 /* Parse an Objective-C protocol declaration. */
24036 cp_parser_objc_protocol_declaration (cp_parser* parser, tree attributes)
24038 tree proto, protorefs;
24041 cp_lexer_consume_token (parser->lexer); /* Eat '@protocol'. */
24042 if (cp_lexer_next_token_is_not (parser->lexer, CPP_NAME))
24044 tok = cp_lexer_peek_token (parser->lexer);
24045 error_at (tok->location, "identifier expected after %<@protocol%>");
24046 cp_parser_consume_semicolon_at_end_of_statement (parser);
24050 /* See if we have a forward declaration or a definition. */
24051 tok = cp_lexer_peek_nth_token (parser->lexer, 2);
24053 /* Try a forward declaration first. */
24054 if (tok->type == CPP_COMMA || tok->type == CPP_SEMICOLON)
24060 id = cp_parser_identifier (parser);
24061 if (id == error_mark_node)
24064 objc_declare_protocol (id, attributes);
24066 if(cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
24067 cp_lexer_consume_token (parser->lexer);
24071 cp_parser_consume_semicolon_at_end_of_statement (parser);
24074 /* Ok, we got a full-fledged definition (or at least should). */
24077 proto = cp_parser_identifier (parser);
24078 protorefs = cp_parser_objc_protocol_refs_opt (parser);
24079 objc_start_protocol (proto, protorefs, attributes);
24080 cp_parser_objc_method_prototype_list (parser);
24084 /* Parse an Objective-C superclass or category. */
24087 cp_parser_objc_superclass_or_category (cp_parser *parser,
24090 tree *categ, bool *is_class_extension)
24092 cp_token *next = cp_lexer_peek_token (parser->lexer);
24094 *super = *categ = NULL_TREE;
24095 *is_class_extension = false;
24096 if (next->type == CPP_COLON)
24098 cp_lexer_consume_token (parser->lexer); /* Eat ':'. */
24099 *super = cp_parser_identifier (parser);
24101 else if (next->type == CPP_OPEN_PAREN)
24103 cp_lexer_consume_token (parser->lexer); /* Eat '('. */
24105 /* If there is no category name, and this is an @interface, we
24106 have a class extension. */
24107 if (iface_p && cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_PAREN))
24109 *categ = NULL_TREE;
24110 *is_class_extension = true;
24113 *categ = cp_parser_identifier (parser);
24115 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
24119 /* Parse an Objective-C class interface. */
24122 cp_parser_objc_class_interface (cp_parser* parser, tree attributes)
24124 tree name, super, categ, protos;
24125 bool is_class_extension;
24127 cp_lexer_consume_token (parser->lexer); /* Eat '@interface'. */
24128 name = cp_parser_identifier (parser);
24129 if (name == error_mark_node)
24131 /* It's hard to recover because even if valid @interface stuff
24132 is to follow, we can't compile it (or validate it) if we
24133 don't even know which class it refers to. Let's assume this
24134 was a stray '@interface' token in the stream and skip it.
24138 cp_parser_objc_superclass_or_category (parser, true, &super, &categ,
24139 &is_class_extension);
24140 protos = cp_parser_objc_protocol_refs_opt (parser);
24142 /* We have either a class or a category on our hands. */
24143 if (categ || is_class_extension)
24144 objc_start_category_interface (name, categ, protos, attributes);
24147 objc_start_class_interface (name, super, protos, attributes);
24148 /* Handle instance variable declarations, if any. */
24149 cp_parser_objc_class_ivars (parser);
24150 objc_continue_interface ();
24153 cp_parser_objc_method_prototype_list (parser);
24156 /* Parse an Objective-C class implementation. */
24159 cp_parser_objc_class_implementation (cp_parser* parser)
24161 tree name, super, categ;
24162 bool is_class_extension;
24164 cp_lexer_consume_token (parser->lexer); /* Eat '@implementation'. */
24165 name = cp_parser_identifier (parser);
24166 if (name == error_mark_node)
24168 /* It's hard to recover because even if valid @implementation
24169 stuff is to follow, we can't compile it (or validate it) if
24170 we don't even know which class it refers to. Let's assume
24171 this was a stray '@implementation' token in the stream and
24176 cp_parser_objc_superclass_or_category (parser, false, &super, &categ,
24177 &is_class_extension);
24179 /* We have either a class or a category on our hands. */
24181 objc_start_category_implementation (name, categ);
24184 objc_start_class_implementation (name, super);
24185 /* Handle instance variable declarations, if any. */
24186 cp_parser_objc_class_ivars (parser);
24187 objc_continue_implementation ();
24190 cp_parser_objc_method_definition_list (parser);
24193 /* Consume the @end token and finish off the implementation. */
24196 cp_parser_objc_end_implementation (cp_parser* parser)
24198 cp_lexer_consume_token (parser->lexer); /* Eat '@end'. */
24199 objc_finish_implementation ();
24202 /* Parse an Objective-C declaration. */
24205 cp_parser_objc_declaration (cp_parser* parser, tree attributes)
24207 /* Try to figure out what kind of declaration is present. */
24208 cp_token *kwd = cp_lexer_peek_token (parser->lexer);
24211 switch (kwd->keyword)
24216 error_at (kwd->location, "attributes may not be specified before"
24217 " the %<@%D%> Objective-C++ keyword",
24221 case RID_AT_IMPLEMENTATION:
24222 warning_at (kwd->location, OPT_Wattributes,
24223 "prefix attributes are ignored before %<@%D%>",
24230 switch (kwd->keyword)
24233 cp_parser_objc_alias_declaration (parser);
24236 cp_parser_objc_class_declaration (parser);
24238 case RID_AT_PROTOCOL:
24239 cp_parser_objc_protocol_declaration (parser, attributes);
24241 case RID_AT_INTERFACE:
24242 cp_parser_objc_class_interface (parser, attributes);
24244 case RID_AT_IMPLEMENTATION:
24245 cp_parser_objc_class_implementation (parser);
24248 cp_parser_objc_end_implementation (parser);
24251 error_at (kwd->location, "misplaced %<@%D%> Objective-C++ construct",
24253 cp_parser_skip_to_end_of_block_or_statement (parser);
24257 /* Parse an Objective-C try-catch-finally statement.
24259 objc-try-catch-finally-stmt:
24260 @try compound-statement objc-catch-clause-seq [opt]
24261 objc-finally-clause [opt]
24263 objc-catch-clause-seq:
24264 objc-catch-clause objc-catch-clause-seq [opt]
24267 @catch ( objc-exception-declaration ) compound-statement
24269 objc-finally-clause:
24270 @finally compound-statement
24272 objc-exception-declaration:
24273 parameter-declaration
24276 where '...' is to be interpreted literally, that is, it means CPP_ELLIPSIS.
24280 PS: This function is identical to c_parser_objc_try_catch_finally_statement
24281 for C. Keep them in sync. */
24284 cp_parser_objc_try_catch_finally_statement (cp_parser *parser)
24286 location_t location;
24289 cp_parser_require_keyword (parser, RID_AT_TRY, RT_AT_TRY);
24290 location = cp_lexer_peek_token (parser->lexer)->location;
24291 objc_maybe_warn_exceptions (location);
24292 /* NB: The @try block needs to be wrapped in its own STATEMENT_LIST
24293 node, lest it get absorbed into the surrounding block. */
24294 stmt = push_stmt_list ();
24295 cp_parser_compound_statement (parser, NULL, false, false);
24296 objc_begin_try_stmt (location, pop_stmt_list (stmt));
24298 while (cp_lexer_next_token_is_keyword (parser->lexer, RID_AT_CATCH))
24300 cp_parameter_declarator *parm;
24301 tree parameter_declaration = error_mark_node;
24302 bool seen_open_paren = false;
24304 cp_lexer_consume_token (parser->lexer);
24305 if (cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
24306 seen_open_paren = true;
24307 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
24309 /* We have "@catch (...)" (where the '...' are literally
24310 what is in the code). Skip the '...'.
24311 parameter_declaration is set to NULL_TREE, and
24312 objc_being_catch_clauses() knows that that means
24314 cp_lexer_consume_token (parser->lexer);
24315 parameter_declaration = NULL_TREE;
24319 /* We have "@catch (NSException *exception)" or something
24320 like that. Parse the parameter declaration. */
24321 parm = cp_parser_parameter_declaration (parser, false, NULL);
24323 parameter_declaration = error_mark_node;
24325 parameter_declaration = grokdeclarator (parm->declarator,
24326 &parm->decl_specifiers,
24327 PARM, /*initialized=*/0,
24328 /*attrlist=*/NULL);
24330 if (seen_open_paren)
24331 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
24334 /* If there was no open parenthesis, we are recovering from
24335 an error, and we are trying to figure out what mistake
24336 the user has made. */
24338 /* If there is an immediate closing parenthesis, the user
24339 probably forgot the opening one (ie, they typed "@catch
24340 NSException *e)". Parse the closing parenthesis and keep
24342 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_PAREN))
24343 cp_lexer_consume_token (parser->lexer);
24345 /* If these is no immediate closing parenthesis, the user
24346 probably doesn't know that parenthesis are required at
24347 all (ie, they typed "@catch NSException *e"). So, just
24348 forget about the closing parenthesis and keep going. */
24350 objc_begin_catch_clause (parameter_declaration);
24351 cp_parser_compound_statement (parser, NULL, false, false);
24352 objc_finish_catch_clause ();
24354 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_AT_FINALLY))
24356 cp_lexer_consume_token (parser->lexer);
24357 location = cp_lexer_peek_token (parser->lexer)->location;
24358 /* NB: The @finally block needs to be wrapped in its own STATEMENT_LIST
24359 node, lest it get absorbed into the surrounding block. */
24360 stmt = push_stmt_list ();
24361 cp_parser_compound_statement (parser, NULL, false, false);
24362 objc_build_finally_clause (location, pop_stmt_list (stmt));
24365 return objc_finish_try_stmt ();
24368 /* Parse an Objective-C synchronized statement.
24370 objc-synchronized-stmt:
24371 @synchronized ( expression ) compound-statement
24373 Returns NULL_TREE. */
24376 cp_parser_objc_synchronized_statement (cp_parser *parser)
24378 location_t location;
24381 cp_parser_require_keyword (parser, RID_AT_SYNCHRONIZED, RT_AT_SYNCHRONIZED);
24383 location = cp_lexer_peek_token (parser->lexer)->location;
24384 objc_maybe_warn_exceptions (location);
24385 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
24386 lock = cp_parser_expression (parser, false, NULL);
24387 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
24389 /* NB: The @synchronized block needs to be wrapped in its own STATEMENT_LIST
24390 node, lest it get absorbed into the surrounding block. */
24391 stmt = push_stmt_list ();
24392 cp_parser_compound_statement (parser, NULL, false, false);
24394 return objc_build_synchronized (location, lock, pop_stmt_list (stmt));
24397 /* Parse an Objective-C throw statement.
24400 @throw assignment-expression [opt] ;
24402 Returns a constructed '@throw' statement. */
24405 cp_parser_objc_throw_statement (cp_parser *parser)
24407 tree expr = NULL_TREE;
24408 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
24410 cp_parser_require_keyword (parser, RID_AT_THROW, RT_AT_THROW);
24412 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
24413 expr = cp_parser_expression (parser, /*cast_p=*/false, NULL);
24415 cp_parser_consume_semicolon_at_end_of_statement (parser);
24417 return objc_build_throw_stmt (loc, expr);
24420 /* Parse an Objective-C statement. */
24423 cp_parser_objc_statement (cp_parser * parser)
24425 /* Try to figure out what kind of declaration is present. */
24426 cp_token *kwd = cp_lexer_peek_token (parser->lexer);
24428 switch (kwd->keyword)
24431 return cp_parser_objc_try_catch_finally_statement (parser);
24432 case RID_AT_SYNCHRONIZED:
24433 return cp_parser_objc_synchronized_statement (parser);
24435 return cp_parser_objc_throw_statement (parser);
24437 error_at (kwd->location, "misplaced %<@%D%> Objective-C++ construct",
24439 cp_parser_skip_to_end_of_block_or_statement (parser);
24442 return error_mark_node;
24445 /* If we are compiling ObjC++ and we see an __attribute__ we neeed to
24446 look ahead to see if an objc keyword follows the attributes. This
24447 is to detect the use of prefix attributes on ObjC @interface and
24451 cp_parser_objc_valid_prefix_attributes (cp_parser* parser, tree *attrib)
24453 cp_lexer_save_tokens (parser->lexer);
24454 *attrib = cp_parser_attributes_opt (parser);
24455 gcc_assert (*attrib);
24456 if (OBJC_IS_AT_KEYWORD (cp_lexer_peek_token (parser->lexer)->keyword))
24458 cp_lexer_commit_tokens (parser->lexer);
24461 cp_lexer_rollback_tokens (parser->lexer);
24465 /* This routine is a minimal replacement for
24466 c_parser_struct_declaration () used when parsing the list of
24467 types/names or ObjC++ properties. For example, when parsing the
24470 @property (readonly) int a, b, c;
24472 this function is responsible for parsing "int a, int b, int c" and
24473 returning the declarations as CHAIN of DECLs.
24475 TODO: Share this code with cp_parser_objc_class_ivars. It's very
24476 similar parsing. */
24478 cp_parser_objc_struct_declaration (cp_parser *parser)
24480 tree decls = NULL_TREE;
24481 cp_decl_specifier_seq declspecs;
24482 int decl_class_or_enum_p;
24483 tree prefix_attributes;
24485 cp_parser_decl_specifier_seq (parser,
24486 CP_PARSER_FLAGS_NONE,
24488 &decl_class_or_enum_p);
24490 if (declspecs.type == error_mark_node)
24491 return error_mark_node;
24493 /* auto, register, static, extern, mutable. */
24494 if (declspecs.storage_class != sc_none)
24496 cp_parser_error (parser, "invalid type for property");
24497 declspecs.storage_class = sc_none;
24501 if (declspecs.specs[(int) ds_thread])
24503 cp_parser_error (parser, "invalid type for property");
24504 declspecs.specs[(int) ds_thread] = 0;
24508 if (declspecs.specs[(int) ds_typedef])
24510 cp_parser_error (parser, "invalid type for property");
24511 declspecs.specs[(int) ds_typedef] = 0;
24514 prefix_attributes = declspecs.attributes;
24515 declspecs.attributes = NULL_TREE;
24517 /* Keep going until we hit the `;' at the end of the declaration. */
24518 while (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
24520 tree attributes, first_attribute, decl;
24521 cp_declarator *declarator;
24524 /* Parse the declarator. */
24525 declarator = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
24526 NULL, NULL, false);
24528 /* Look for attributes that apply to the ivar. */
24529 attributes = cp_parser_attributes_opt (parser);
24530 /* Remember which attributes are prefix attributes and
24532 first_attribute = attributes;
24533 /* Combine the attributes. */
24534 attributes = chainon (prefix_attributes, attributes);
24536 decl = grokfield (declarator, &declspecs,
24537 NULL_TREE, /*init_const_expr_p=*/false,
24538 NULL_TREE, attributes);
24540 if (decl == error_mark_node || decl == NULL_TREE)
24541 return error_mark_node;
24543 /* Reset PREFIX_ATTRIBUTES. */
24544 while (attributes && TREE_CHAIN (attributes) != first_attribute)
24545 attributes = TREE_CHAIN (attributes);
24547 TREE_CHAIN (attributes) = NULL_TREE;
24549 DECL_CHAIN (decl) = decls;
24552 token = cp_lexer_peek_token (parser->lexer);
24553 if (token->type == CPP_COMMA)
24555 cp_lexer_consume_token (parser->lexer); /* Eat ','. */
24564 /* Parse an Objective-C @property declaration. The syntax is:
24566 objc-property-declaration:
24567 '@property' objc-property-attributes[opt] struct-declaration ;
24569 objc-property-attributes:
24570 '(' objc-property-attribute-list ')'
24572 objc-property-attribute-list:
24573 objc-property-attribute
24574 objc-property-attribute-list, objc-property-attribute
24576 objc-property-attribute
24577 'getter' = identifier
24578 'setter' = identifier
24587 @property NSString *name;
24588 @property (readonly) id object;
24589 @property (retain, nonatomic, getter=getTheName) id name;
24590 @property int a, b, c;
24592 PS: This function is identical to
24593 c_parser_objc_at_property_declaration for C. Keep them in sync. */
24595 cp_parser_objc_at_property_declaration (cp_parser *parser)
24597 /* The following variables hold the attributes of the properties as
24598 parsed. They are 'false' or 'NULL_TREE' if the attribute was not
24599 seen. When we see an attribute, we set them to 'true' (if they
24600 are boolean properties) or to the identifier (if they have an
24601 argument, ie, for getter and setter). Note that here we only
24602 parse the list of attributes, check the syntax and accumulate the
24603 attributes that we find. objc_add_property_declaration() will
24604 then process the information. */
24605 bool property_assign = false;
24606 bool property_copy = false;
24607 tree property_getter_ident = NULL_TREE;
24608 bool property_nonatomic = false;
24609 bool property_readonly = false;
24610 bool property_readwrite = false;
24611 bool property_retain = false;
24612 tree property_setter_ident = NULL_TREE;
24614 /* 'properties' is the list of properties that we read. Usually a
24615 single one, but maybe more (eg, in "@property int a, b, c;" there
24620 loc = cp_lexer_peek_token (parser->lexer)->location;
24622 cp_lexer_consume_token (parser->lexer); /* Eat '@property'. */
24624 /* Parse the optional attribute list... */
24625 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
24628 cp_lexer_consume_token (parser->lexer);
24632 bool syntax_error = false;
24633 cp_token *token = cp_lexer_peek_token (parser->lexer);
24636 if (token->type != CPP_NAME)
24638 cp_parser_error (parser, "expected identifier");
24641 keyword = C_RID_CODE (token->u.value);
24642 cp_lexer_consume_token (parser->lexer);
24645 case RID_ASSIGN: property_assign = true; break;
24646 case RID_COPY: property_copy = true; break;
24647 case RID_NONATOMIC: property_nonatomic = true; break;
24648 case RID_READONLY: property_readonly = true; break;
24649 case RID_READWRITE: property_readwrite = true; break;
24650 case RID_RETAIN: property_retain = true; break;
24654 if (cp_lexer_next_token_is_not (parser->lexer, CPP_EQ))
24656 if (keyword == RID_GETTER)
24657 cp_parser_error (parser,
24658 "missing %<=%> (after %<getter%> attribute)");
24660 cp_parser_error (parser,
24661 "missing %<=%> (after %<setter%> attribute)");
24662 syntax_error = true;
24665 cp_lexer_consume_token (parser->lexer); /* eat the = */
24666 if (!cp_parser_objc_selector_p (cp_lexer_peek_token (parser->lexer)->type))
24668 cp_parser_error (parser, "expected identifier");
24669 syntax_error = true;
24672 if (keyword == RID_SETTER)
24674 if (property_setter_ident != NULL_TREE)
24676 cp_parser_error (parser, "the %<setter%> attribute may only be specified once");
24677 cp_lexer_consume_token (parser->lexer);
24680 property_setter_ident = cp_parser_objc_selector (parser);
24681 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COLON))
24682 cp_parser_error (parser, "setter name must terminate with %<:%>");
24684 cp_lexer_consume_token (parser->lexer);
24688 if (property_getter_ident != NULL_TREE)
24690 cp_parser_error (parser, "the %<getter%> attribute may only be specified once");
24691 cp_lexer_consume_token (parser->lexer);
24694 property_getter_ident = cp_parser_objc_selector (parser);
24698 cp_parser_error (parser, "unknown property attribute");
24699 syntax_error = true;
24706 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
24707 cp_lexer_consume_token (parser->lexer);
24712 /* FIXME: "@property (setter, assign);" will generate a spurious
24713 "error: expected ‘)’ before ‘,’ token". This is because
24714 cp_parser_require, unlike the C counterpart, will produce an
24715 error even if we are in error recovery. */
24716 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
24718 cp_parser_skip_to_closing_parenthesis (parser,
24719 /*recovering=*/true,
24720 /*or_comma=*/false,
24721 /*consume_paren=*/true);
24725 /* ... and the property declaration(s). */
24726 properties = cp_parser_objc_struct_declaration (parser);
24728 if (properties == error_mark_node)
24730 cp_parser_skip_to_end_of_statement (parser);
24731 /* If the next token is now a `;', consume it. */
24732 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
24733 cp_lexer_consume_token (parser->lexer);
24737 if (properties == NULL_TREE)
24738 cp_parser_error (parser, "expected identifier");
24741 /* Comma-separated properties are chained together in
24742 reverse order; add them one by one. */
24743 properties = nreverse (properties);
24745 for (; properties; properties = TREE_CHAIN (properties))
24746 objc_add_property_declaration (loc, copy_node (properties),
24747 property_readonly, property_readwrite,
24748 property_assign, property_retain,
24749 property_copy, property_nonatomic,
24750 property_getter_ident, property_setter_ident);
24753 cp_parser_consume_semicolon_at_end_of_statement (parser);
24756 /* Parse an Objective-C++ @synthesize declaration. The syntax is:
24758 objc-synthesize-declaration:
24759 @synthesize objc-synthesize-identifier-list ;
24761 objc-synthesize-identifier-list:
24762 objc-synthesize-identifier
24763 objc-synthesize-identifier-list, objc-synthesize-identifier
24765 objc-synthesize-identifier
24767 identifier = identifier
24770 @synthesize MyProperty;
24771 @synthesize OneProperty, AnotherProperty=MyIvar, YetAnotherProperty;
24773 PS: This function is identical to c_parser_objc_at_synthesize_declaration
24774 for C. Keep them in sync.
24777 cp_parser_objc_at_synthesize_declaration (cp_parser *parser)
24779 tree list = NULL_TREE;
24781 loc = cp_lexer_peek_token (parser->lexer)->location;
24783 cp_lexer_consume_token (parser->lexer); /* Eat '@synthesize'. */
24786 tree property, ivar;
24787 property = cp_parser_identifier (parser);
24788 if (property == error_mark_node)
24790 cp_parser_consume_semicolon_at_end_of_statement (parser);
24793 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
24795 cp_lexer_consume_token (parser->lexer);
24796 ivar = cp_parser_identifier (parser);
24797 if (ivar == error_mark_node)
24799 cp_parser_consume_semicolon_at_end_of_statement (parser);
24805 list = chainon (list, build_tree_list (ivar, property));
24806 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
24807 cp_lexer_consume_token (parser->lexer);
24811 cp_parser_consume_semicolon_at_end_of_statement (parser);
24812 objc_add_synthesize_declaration (loc, list);
24815 /* Parse an Objective-C++ @dynamic declaration. The syntax is:
24817 objc-dynamic-declaration:
24818 @dynamic identifier-list ;
24821 @dynamic MyProperty;
24822 @dynamic MyProperty, AnotherProperty;
24824 PS: This function is identical to c_parser_objc_at_dynamic_declaration
24825 for C. Keep them in sync.
24828 cp_parser_objc_at_dynamic_declaration (cp_parser *parser)
24830 tree list = NULL_TREE;
24832 loc = cp_lexer_peek_token (parser->lexer)->location;
24834 cp_lexer_consume_token (parser->lexer); /* Eat '@dynamic'. */
24838 property = cp_parser_identifier (parser);
24839 if (property == error_mark_node)
24841 cp_parser_consume_semicolon_at_end_of_statement (parser);
24844 list = chainon (list, build_tree_list (NULL, property));
24845 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
24846 cp_lexer_consume_token (parser->lexer);
24850 cp_parser_consume_semicolon_at_end_of_statement (parser);
24851 objc_add_dynamic_declaration (loc, list);
24855 /* OpenMP 2.5 parsing routines. */
24857 /* Returns name of the next clause.
24858 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
24859 the token is not consumed. Otherwise appropriate pragma_omp_clause is
24860 returned and the token is consumed. */
24862 static pragma_omp_clause
24863 cp_parser_omp_clause_name (cp_parser *parser)
24865 pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE;
24867 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_IF))
24868 result = PRAGMA_OMP_CLAUSE_IF;
24869 else if (cp_lexer_next_token_is_keyword (parser->lexer, RID_DEFAULT))
24870 result = PRAGMA_OMP_CLAUSE_DEFAULT;
24871 else if (cp_lexer_next_token_is_keyword (parser->lexer, RID_PRIVATE))
24872 result = PRAGMA_OMP_CLAUSE_PRIVATE;
24873 else if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
24875 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
24876 const char *p = IDENTIFIER_POINTER (id);
24881 if (!strcmp ("collapse", p))
24882 result = PRAGMA_OMP_CLAUSE_COLLAPSE;
24883 else if (!strcmp ("copyin", p))
24884 result = PRAGMA_OMP_CLAUSE_COPYIN;
24885 else if (!strcmp ("copyprivate", p))
24886 result = PRAGMA_OMP_CLAUSE_COPYPRIVATE;
24889 if (!strcmp ("final", p))
24890 result = PRAGMA_OMP_CLAUSE_FINAL;
24891 else if (!strcmp ("firstprivate", p))
24892 result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE;
24895 if (!strcmp ("lastprivate", p))
24896 result = PRAGMA_OMP_CLAUSE_LASTPRIVATE;
24899 if (!strcmp ("mergeable", p))
24900 result = PRAGMA_OMP_CLAUSE_MERGEABLE;
24903 if (!strcmp ("nowait", p))
24904 result = PRAGMA_OMP_CLAUSE_NOWAIT;
24905 else if (!strcmp ("num_threads", p))
24906 result = PRAGMA_OMP_CLAUSE_NUM_THREADS;
24909 if (!strcmp ("ordered", p))
24910 result = PRAGMA_OMP_CLAUSE_ORDERED;
24913 if (!strcmp ("reduction", p))
24914 result = PRAGMA_OMP_CLAUSE_REDUCTION;
24917 if (!strcmp ("schedule", p))
24918 result = PRAGMA_OMP_CLAUSE_SCHEDULE;
24919 else if (!strcmp ("shared", p))
24920 result = PRAGMA_OMP_CLAUSE_SHARED;
24923 if (!strcmp ("untied", p))
24924 result = PRAGMA_OMP_CLAUSE_UNTIED;
24929 if (result != PRAGMA_OMP_CLAUSE_NONE)
24930 cp_lexer_consume_token (parser->lexer);
24935 /* Validate that a clause of the given type does not already exist. */
24938 check_no_duplicate_clause (tree clauses, enum omp_clause_code code,
24939 const char *name, location_t location)
24943 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
24944 if (OMP_CLAUSE_CODE (c) == code)
24946 error_at (location, "too many %qs clauses", name);
24954 variable-list , identifier
24956 In addition, we match a closing parenthesis. An opening parenthesis
24957 will have been consumed by the caller.
24959 If KIND is nonzero, create the appropriate node and install the decl
24960 in OMP_CLAUSE_DECL and add the node to the head of the list.
24962 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
24963 return the list created. */
24966 cp_parser_omp_var_list_no_open (cp_parser *parser, enum omp_clause_code kind,
24974 token = cp_lexer_peek_token (parser->lexer);
24975 name = cp_parser_id_expression (parser, /*template_p=*/false,
24976 /*check_dependency_p=*/true,
24977 /*template_p=*/NULL,
24978 /*declarator_p=*/false,
24979 /*optional_p=*/false);
24980 if (name == error_mark_node)
24983 decl = cp_parser_lookup_name_simple (parser, name, token->location);
24984 if (decl == error_mark_node)
24985 cp_parser_name_lookup_error (parser, name, decl, NLE_NULL,
24987 else if (kind != 0)
24989 tree u = build_omp_clause (token->location, kind);
24990 OMP_CLAUSE_DECL (u) = decl;
24991 OMP_CLAUSE_CHAIN (u) = list;
24995 list = tree_cons (decl, NULL_TREE, list);
24998 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
25000 cp_lexer_consume_token (parser->lexer);
25003 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
25007 /* Try to resync to an unnested comma. Copied from
25008 cp_parser_parenthesized_expression_list. */
25010 ending = cp_parser_skip_to_closing_parenthesis (parser,
25011 /*recovering=*/true,
25013 /*consume_paren=*/true);
25021 /* Similarly, but expect leading and trailing parenthesis. This is a very
25022 common case for omp clauses. */
25025 cp_parser_omp_var_list (cp_parser *parser, enum omp_clause_code kind, tree list)
25027 if (cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
25028 return cp_parser_omp_var_list_no_open (parser, kind, list);
25033 collapse ( constant-expression ) */
25036 cp_parser_omp_clause_collapse (cp_parser *parser, tree list, location_t location)
25042 loc = cp_lexer_peek_token (parser->lexer)->location;
25043 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
25046 num = cp_parser_constant_expression (parser, false, NULL);
25048 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
25049 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
25050 /*or_comma=*/false,
25051 /*consume_paren=*/true);
25053 if (num == error_mark_node)
25055 num = fold_non_dependent_expr (num);
25056 if (!INTEGRAL_TYPE_P (TREE_TYPE (num))
25057 || !host_integerp (num, 0)
25058 || (n = tree_low_cst (num, 0)) <= 0
25061 error_at (loc, "collapse argument needs positive constant integer expression");
25065 check_no_duplicate_clause (list, OMP_CLAUSE_COLLAPSE, "collapse", location);
25066 c = build_omp_clause (loc, OMP_CLAUSE_COLLAPSE);
25067 OMP_CLAUSE_CHAIN (c) = list;
25068 OMP_CLAUSE_COLLAPSE_EXPR (c) = num;
25074 default ( shared | none ) */
25077 cp_parser_omp_clause_default (cp_parser *parser, tree list, location_t location)
25079 enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED;
25082 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
25084 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
25086 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
25087 const char *p = IDENTIFIER_POINTER (id);
25092 if (strcmp ("none", p) != 0)
25094 kind = OMP_CLAUSE_DEFAULT_NONE;
25098 if (strcmp ("shared", p) != 0)
25100 kind = OMP_CLAUSE_DEFAULT_SHARED;
25107 cp_lexer_consume_token (parser->lexer);
25112 cp_parser_error (parser, "expected %<none%> or %<shared%>");
25115 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
25116 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
25117 /*or_comma=*/false,
25118 /*consume_paren=*/true);
25120 if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED)
25123 check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default", location);
25124 c = build_omp_clause (location, OMP_CLAUSE_DEFAULT);
25125 OMP_CLAUSE_CHAIN (c) = list;
25126 OMP_CLAUSE_DEFAULT_KIND (c) = kind;
25132 final ( expression ) */
25135 cp_parser_omp_clause_final (cp_parser *parser, tree list, location_t location)
25139 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
25142 t = cp_parser_condition (parser);
25144 if (t == error_mark_node
25145 || !cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
25146 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
25147 /*or_comma=*/false,
25148 /*consume_paren=*/true);
25150 check_no_duplicate_clause (list, OMP_CLAUSE_FINAL, "final", location);
25152 c = build_omp_clause (location, OMP_CLAUSE_FINAL);
25153 OMP_CLAUSE_FINAL_EXPR (c) = t;
25154 OMP_CLAUSE_CHAIN (c) = list;
25160 if ( expression ) */
25163 cp_parser_omp_clause_if (cp_parser *parser, tree list, location_t location)
25167 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
25170 t = cp_parser_condition (parser);
25172 if (t == error_mark_node
25173 || !cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
25174 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
25175 /*or_comma=*/false,
25176 /*consume_paren=*/true);
25178 check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if", location);
25180 c = build_omp_clause (location, OMP_CLAUSE_IF);
25181 OMP_CLAUSE_IF_EXPR (c) = t;
25182 OMP_CLAUSE_CHAIN (c) = list;
25191 cp_parser_omp_clause_mergeable (cp_parser *parser ATTRIBUTE_UNUSED,
25192 tree list, location_t location)
25196 check_no_duplicate_clause (list, OMP_CLAUSE_MERGEABLE, "mergeable",
25199 c = build_omp_clause (location, OMP_CLAUSE_MERGEABLE);
25200 OMP_CLAUSE_CHAIN (c) = list;
25208 cp_parser_omp_clause_nowait (cp_parser *parser ATTRIBUTE_UNUSED,
25209 tree list, location_t location)
25213 check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait", location);
25215 c = build_omp_clause (location, OMP_CLAUSE_NOWAIT);
25216 OMP_CLAUSE_CHAIN (c) = list;
25221 num_threads ( expression ) */
25224 cp_parser_omp_clause_num_threads (cp_parser *parser, tree list,
25225 location_t location)
25229 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
25232 t = cp_parser_expression (parser, false, NULL);
25234 if (t == error_mark_node
25235 || !cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
25236 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
25237 /*or_comma=*/false,
25238 /*consume_paren=*/true);
25240 check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS,
25241 "num_threads", location);
25243 c = build_omp_clause (location, OMP_CLAUSE_NUM_THREADS);
25244 OMP_CLAUSE_NUM_THREADS_EXPR (c) = t;
25245 OMP_CLAUSE_CHAIN (c) = list;
25254 cp_parser_omp_clause_ordered (cp_parser *parser ATTRIBUTE_UNUSED,
25255 tree list, location_t location)
25259 check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED,
25260 "ordered", location);
25262 c = build_omp_clause (location, OMP_CLAUSE_ORDERED);
25263 OMP_CLAUSE_CHAIN (c) = list;
25268 reduction ( reduction-operator : variable-list )
25270 reduction-operator:
25271 One of: + * - & ^ | && ||
25275 reduction-operator:
25276 One of: + * - & ^ | && || min max */
25279 cp_parser_omp_clause_reduction (cp_parser *parser, tree list)
25281 enum tree_code code;
25284 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
25287 switch (cp_lexer_peek_token (parser->lexer)->type)
25299 code = BIT_AND_EXPR;
25302 code = BIT_XOR_EXPR;
25305 code = BIT_IOR_EXPR;
25308 code = TRUTH_ANDIF_EXPR;
25311 code = TRUTH_ORIF_EXPR;
25315 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
25316 const char *p = IDENTIFIER_POINTER (id);
25318 if (strcmp (p, "min") == 0)
25323 if (strcmp (p, "max") == 0)
25331 cp_parser_error (parser, "expected %<+%>, %<*%>, %<-%>, %<&%>, %<^%>, "
25332 "%<|%>, %<&&%>, %<||%>, %<min%> or %<max%>");
25334 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
25335 /*or_comma=*/false,
25336 /*consume_paren=*/true);
25339 cp_lexer_consume_token (parser->lexer);
25341 if (!cp_parser_require (parser, CPP_COLON, RT_COLON))
25344 nlist = cp_parser_omp_var_list_no_open (parser, OMP_CLAUSE_REDUCTION, list);
25345 for (c = nlist; c != list; c = OMP_CLAUSE_CHAIN (c))
25346 OMP_CLAUSE_REDUCTION_CODE (c) = code;
25352 schedule ( schedule-kind )
25353 schedule ( schedule-kind , expression )
25356 static | dynamic | guided | runtime | auto */
25359 cp_parser_omp_clause_schedule (cp_parser *parser, tree list, location_t location)
25363 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
25366 c = build_omp_clause (location, OMP_CLAUSE_SCHEDULE);
25368 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
25370 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
25371 const char *p = IDENTIFIER_POINTER (id);
25376 if (strcmp ("dynamic", p) != 0)
25378 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC;
25382 if (strcmp ("guided", p) != 0)
25384 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED;
25388 if (strcmp ("runtime", p) != 0)
25390 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME;
25397 else if (cp_lexer_next_token_is_keyword (parser->lexer, RID_STATIC))
25398 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC;
25399 else if (cp_lexer_next_token_is_keyword (parser->lexer, RID_AUTO))
25400 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO;
25403 cp_lexer_consume_token (parser->lexer);
25405 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
25408 cp_lexer_consume_token (parser->lexer);
25410 token = cp_lexer_peek_token (parser->lexer);
25411 t = cp_parser_assignment_expression (parser, false, NULL);
25413 if (t == error_mark_node)
25415 else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME)
25416 error_at (token->location, "schedule %<runtime%> does not take "
25417 "a %<chunk_size%> parameter");
25418 else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_AUTO)
25419 error_at (token->location, "schedule %<auto%> does not take "
25420 "a %<chunk_size%> parameter");
25422 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t;
25424 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
25427 else if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_COMMA_CLOSE_PAREN))
25430 check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule", location);
25431 OMP_CLAUSE_CHAIN (c) = list;
25435 cp_parser_error (parser, "invalid schedule kind");
25437 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
25438 /*or_comma=*/false,
25439 /*consume_paren=*/true);
25447 cp_parser_omp_clause_untied (cp_parser *parser ATTRIBUTE_UNUSED,
25448 tree list, location_t location)
25452 check_no_duplicate_clause (list, OMP_CLAUSE_UNTIED, "untied", location);
25454 c = build_omp_clause (location, OMP_CLAUSE_UNTIED);
25455 OMP_CLAUSE_CHAIN (c) = list;
25459 /* Parse all OpenMP clauses. The set clauses allowed by the directive
25460 is a bitmask in MASK. Return the list of clauses found; the result
25461 of clause default goes in *pdefault. */
25464 cp_parser_omp_all_clauses (cp_parser *parser, unsigned int mask,
25465 const char *where, cp_token *pragma_tok)
25467 tree clauses = NULL;
25469 cp_token *token = NULL;
25471 while (cp_lexer_next_token_is_not (parser->lexer, CPP_PRAGMA_EOL))
25473 pragma_omp_clause c_kind;
25474 const char *c_name;
25475 tree prev = clauses;
25477 if (!first && cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
25478 cp_lexer_consume_token (parser->lexer);
25480 token = cp_lexer_peek_token (parser->lexer);
25481 c_kind = cp_parser_omp_clause_name (parser);
25486 case PRAGMA_OMP_CLAUSE_COLLAPSE:
25487 clauses = cp_parser_omp_clause_collapse (parser, clauses,
25489 c_name = "collapse";
25491 case PRAGMA_OMP_CLAUSE_COPYIN:
25492 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_COPYIN, clauses);
25495 case PRAGMA_OMP_CLAUSE_COPYPRIVATE:
25496 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_COPYPRIVATE,
25498 c_name = "copyprivate";
25500 case PRAGMA_OMP_CLAUSE_DEFAULT:
25501 clauses = cp_parser_omp_clause_default (parser, clauses,
25503 c_name = "default";
25505 case PRAGMA_OMP_CLAUSE_FINAL:
25506 clauses = cp_parser_omp_clause_final (parser, clauses, token->location);
25509 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE:
25510 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_FIRSTPRIVATE,
25512 c_name = "firstprivate";
25514 case PRAGMA_OMP_CLAUSE_IF:
25515 clauses = cp_parser_omp_clause_if (parser, clauses, token->location);
25518 case PRAGMA_OMP_CLAUSE_LASTPRIVATE:
25519 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_LASTPRIVATE,
25521 c_name = "lastprivate";
25523 case PRAGMA_OMP_CLAUSE_MERGEABLE:
25524 clauses = cp_parser_omp_clause_mergeable (parser, clauses,
25526 c_name = "mergeable";
25528 case PRAGMA_OMP_CLAUSE_NOWAIT:
25529 clauses = cp_parser_omp_clause_nowait (parser, clauses, token->location);
25532 case PRAGMA_OMP_CLAUSE_NUM_THREADS:
25533 clauses = cp_parser_omp_clause_num_threads (parser, clauses,
25535 c_name = "num_threads";
25537 case PRAGMA_OMP_CLAUSE_ORDERED:
25538 clauses = cp_parser_omp_clause_ordered (parser, clauses,
25540 c_name = "ordered";
25542 case PRAGMA_OMP_CLAUSE_PRIVATE:
25543 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_PRIVATE,
25545 c_name = "private";
25547 case PRAGMA_OMP_CLAUSE_REDUCTION:
25548 clauses = cp_parser_omp_clause_reduction (parser, clauses);
25549 c_name = "reduction";
25551 case PRAGMA_OMP_CLAUSE_SCHEDULE:
25552 clauses = cp_parser_omp_clause_schedule (parser, clauses,
25554 c_name = "schedule";
25556 case PRAGMA_OMP_CLAUSE_SHARED:
25557 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_SHARED,
25561 case PRAGMA_OMP_CLAUSE_UNTIED:
25562 clauses = cp_parser_omp_clause_untied (parser, clauses,
25567 cp_parser_error (parser, "expected %<#pragma omp%> clause");
25571 if (((mask >> c_kind) & 1) == 0)
25573 /* Remove the invalid clause(s) from the list to avoid
25574 confusing the rest of the compiler. */
25576 error_at (token->location, "%qs is not valid for %qs", c_name, where);
25580 cp_parser_skip_to_pragma_eol (parser, pragma_tok);
25581 return finish_omp_clauses (clauses);
25588 In practice, we're also interested in adding the statement to an
25589 outer node. So it is convenient if we work around the fact that
25590 cp_parser_statement calls add_stmt. */
25593 cp_parser_begin_omp_structured_block (cp_parser *parser)
25595 unsigned save = parser->in_statement;
25597 /* Only move the values to IN_OMP_BLOCK if they weren't false.
25598 This preserves the "not within loop or switch" style error messages
25599 for nonsense cases like
25605 if (parser->in_statement)
25606 parser->in_statement = IN_OMP_BLOCK;
25612 cp_parser_end_omp_structured_block (cp_parser *parser, unsigned save)
25614 parser->in_statement = save;
25618 cp_parser_omp_structured_block (cp_parser *parser)
25620 tree stmt = begin_omp_structured_block ();
25621 unsigned int save = cp_parser_begin_omp_structured_block (parser);
25623 cp_parser_statement (parser, NULL_TREE, false, NULL);
25625 cp_parser_end_omp_structured_block (parser, save);
25626 return finish_omp_structured_block (stmt);
25630 # pragma omp atomic new-line
25634 x binop= expr | x++ | ++x | x-- | --x
25636 +, *, -, /, &, ^, |, <<, >>
25638 where x is an lvalue expression with scalar type.
25641 # pragma omp atomic new-line
25644 # pragma omp atomic read new-line
25647 # pragma omp atomic write new-line
25650 # pragma omp atomic update new-line
25653 # pragma omp atomic capture new-line
25656 # pragma omp atomic capture new-line
25664 expression-stmt | x = x binop expr
25666 v = x binop= expr | v = x++ | v = ++x | v = x-- | v = --x
25668 { v = x; update-stmt; } | { update-stmt; v = x; }
25670 where x and v are lvalue expressions with scalar type. */
25673 cp_parser_omp_atomic (cp_parser *parser, cp_token *pragma_tok)
25675 tree lhs = NULL_TREE, rhs = NULL_TREE, v = NULL_TREE, lhs1 = NULL_TREE;
25676 tree rhs1 = NULL_TREE, orig_lhs;
25677 enum tree_code code = OMP_ATOMIC, opcode = NOP_EXPR;
25678 bool structured_block = false;
25680 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
25682 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
25683 const char *p = IDENTIFIER_POINTER (id);
25685 if (!strcmp (p, "read"))
25686 code = OMP_ATOMIC_READ;
25687 else if (!strcmp (p, "write"))
25689 else if (!strcmp (p, "update"))
25691 else if (!strcmp (p, "capture"))
25692 code = OMP_ATOMIC_CAPTURE_NEW;
25696 cp_lexer_consume_token (parser->lexer);
25698 cp_parser_require_pragma_eol (parser, pragma_tok);
25702 case OMP_ATOMIC_READ:
25703 case NOP_EXPR: /* atomic write */
25704 v = cp_parser_unary_expression (parser, /*address_p=*/false,
25705 /*cast_p=*/false, NULL);
25706 if (v == error_mark_node)
25708 if (!cp_parser_require (parser, CPP_EQ, RT_EQ))
25710 if (code == NOP_EXPR)
25711 lhs = cp_parser_expression (parser, /*cast_p=*/false, NULL);
25713 lhs = cp_parser_unary_expression (parser, /*address_p=*/false,
25714 /*cast_p=*/false, NULL);
25715 if (lhs == error_mark_node)
25717 if (code == NOP_EXPR)
25719 /* atomic write is represented by OMP_ATOMIC with NOP_EXPR
25727 case OMP_ATOMIC_CAPTURE_NEW:
25728 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
25730 cp_lexer_consume_token (parser->lexer);
25731 structured_block = true;
25735 v = cp_parser_unary_expression (parser, /*address_p=*/false,
25736 /*cast_p=*/false, NULL);
25737 if (v == error_mark_node)
25739 if (!cp_parser_require (parser, CPP_EQ, RT_EQ))
25747 lhs = cp_parser_unary_expression (parser, /*address_p=*/false,
25748 /*cast_p=*/false, NULL);
25750 switch (TREE_CODE (lhs))
25755 case POSTINCREMENT_EXPR:
25756 if (code == OMP_ATOMIC_CAPTURE_NEW && !structured_block)
25757 code = OMP_ATOMIC_CAPTURE_OLD;
25759 case PREINCREMENT_EXPR:
25760 lhs = TREE_OPERAND (lhs, 0);
25761 opcode = PLUS_EXPR;
25762 rhs = integer_one_node;
25765 case POSTDECREMENT_EXPR:
25766 if (code == OMP_ATOMIC_CAPTURE_NEW && !structured_block)
25767 code = OMP_ATOMIC_CAPTURE_OLD;
25769 case PREDECREMENT_EXPR:
25770 lhs = TREE_OPERAND (lhs, 0);
25771 opcode = MINUS_EXPR;
25772 rhs = integer_one_node;
25775 case COMPOUND_EXPR:
25776 if (TREE_CODE (TREE_OPERAND (lhs, 0)) == SAVE_EXPR
25777 && TREE_CODE (TREE_OPERAND (lhs, 1)) == COMPOUND_EXPR
25778 && TREE_CODE (TREE_OPERAND (TREE_OPERAND (lhs, 1), 0)) == MODIFY_EXPR
25779 && TREE_OPERAND (TREE_OPERAND (lhs, 1), 1) == TREE_OPERAND (lhs, 0)
25780 && TREE_CODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND
25781 (TREE_OPERAND (lhs, 1), 0), 0)))
25783 /* Undo effects of boolean_increment for post {in,de}crement. */
25784 lhs = TREE_OPERAND (TREE_OPERAND (lhs, 1), 0);
25787 if (TREE_CODE (lhs) == MODIFY_EXPR
25788 && TREE_CODE (TREE_TYPE (TREE_OPERAND (lhs, 0))) == BOOLEAN_TYPE)
25790 /* Undo effects of boolean_increment. */
25791 if (integer_onep (TREE_OPERAND (lhs, 1)))
25793 /* This is pre or post increment. */
25794 rhs = TREE_OPERAND (lhs, 1);
25795 lhs = TREE_OPERAND (lhs, 0);
25797 if (code == OMP_ATOMIC_CAPTURE_NEW
25798 && !structured_block
25799 && TREE_CODE (orig_lhs) == COMPOUND_EXPR)
25800 code = OMP_ATOMIC_CAPTURE_OLD;
25806 switch (cp_lexer_peek_token (parser->lexer)->type)
25809 opcode = MULT_EXPR;
25812 opcode = TRUNC_DIV_EXPR;
25815 opcode = PLUS_EXPR;
25818 opcode = MINUS_EXPR;
25820 case CPP_LSHIFT_EQ:
25821 opcode = LSHIFT_EXPR;
25823 case CPP_RSHIFT_EQ:
25824 opcode = RSHIFT_EXPR;
25827 opcode = BIT_AND_EXPR;
25830 opcode = BIT_IOR_EXPR;
25833 opcode = BIT_XOR_EXPR;
25836 if (structured_block || code == OMP_ATOMIC)
25838 enum cp_parser_prec oprec;
25840 cp_lexer_consume_token (parser->lexer);
25841 rhs1 = cp_parser_unary_expression (parser, /*address_p=*/false,
25842 /*cast_p=*/false, NULL);
25843 if (rhs1 == error_mark_node)
25845 token = cp_lexer_peek_token (parser->lexer);
25846 switch (token->type)
25848 case CPP_SEMICOLON:
25849 if (code == OMP_ATOMIC_CAPTURE_NEW)
25851 code = OMP_ATOMIC_CAPTURE_OLD;
25856 cp_lexer_consume_token (parser->lexer);
25859 cp_parser_error (parser,
25860 "invalid form of %<#pragma omp atomic%>");
25863 opcode = MULT_EXPR;
25866 opcode = TRUNC_DIV_EXPR;
25869 opcode = PLUS_EXPR;
25872 opcode = MINUS_EXPR;
25875 opcode = LSHIFT_EXPR;
25878 opcode = RSHIFT_EXPR;
25881 opcode = BIT_AND_EXPR;
25884 opcode = BIT_IOR_EXPR;
25887 opcode = BIT_XOR_EXPR;
25890 cp_parser_error (parser,
25891 "invalid operator for %<#pragma omp atomic%>");
25894 oprec = TOKEN_PRECEDENCE (token);
25895 gcc_assert (oprec != PREC_NOT_OPERATOR);
25896 if (commutative_tree_code (opcode))
25897 oprec = (enum cp_parser_prec) (oprec - 1);
25898 cp_lexer_consume_token (parser->lexer);
25899 rhs = cp_parser_binary_expression (parser, false, false,
25901 if (rhs == error_mark_node)
25907 cp_parser_error (parser,
25908 "invalid operator for %<#pragma omp atomic%>");
25911 cp_lexer_consume_token (parser->lexer);
25913 rhs = cp_parser_expression (parser, false, NULL);
25914 if (rhs == error_mark_node)
25919 if (structured_block && code == OMP_ATOMIC_CAPTURE_NEW)
25921 if (!cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON))
25923 v = cp_parser_unary_expression (parser, /*address_p=*/false,
25924 /*cast_p=*/false, NULL);
25925 if (v == error_mark_node)
25927 if (!cp_parser_require (parser, CPP_EQ, RT_EQ))
25929 lhs1 = cp_parser_unary_expression (parser, /*address_p=*/false,
25930 /*cast_p=*/false, NULL);
25931 if (lhs1 == error_mark_node)
25934 if (structured_block)
25936 cp_parser_consume_semicolon_at_end_of_statement (parser);
25937 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
25940 finish_omp_atomic (code, opcode, lhs, rhs, v, lhs1, rhs1);
25941 if (!structured_block)
25942 cp_parser_consume_semicolon_at_end_of_statement (parser);
25946 cp_parser_skip_to_end_of_block_or_statement (parser);
25947 if (structured_block)
25949 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
25950 cp_lexer_consume_token (parser->lexer);
25951 else if (code == OMP_ATOMIC_CAPTURE_NEW)
25953 cp_parser_skip_to_end_of_block_or_statement (parser);
25954 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
25955 cp_lexer_consume_token (parser->lexer);
25962 # pragma omp barrier new-line */
25965 cp_parser_omp_barrier (cp_parser *parser, cp_token *pragma_tok)
25967 cp_parser_require_pragma_eol (parser, pragma_tok);
25968 finish_omp_barrier ();
25972 # pragma omp critical [(name)] new-line
25973 structured-block */
25976 cp_parser_omp_critical (cp_parser *parser, cp_token *pragma_tok)
25978 tree stmt, name = NULL;
25980 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
25982 cp_lexer_consume_token (parser->lexer);
25984 name = cp_parser_identifier (parser);
25986 if (name == error_mark_node
25987 || !cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
25988 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
25989 /*or_comma=*/false,
25990 /*consume_paren=*/true);
25991 if (name == error_mark_node)
25994 cp_parser_require_pragma_eol (parser, pragma_tok);
25996 stmt = cp_parser_omp_structured_block (parser);
25997 return c_finish_omp_critical (input_location, stmt, name);
26001 # pragma omp flush flush-vars[opt] new-line
26004 ( variable-list ) */
26007 cp_parser_omp_flush (cp_parser *parser, cp_token *pragma_tok)
26009 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
26010 (void) cp_parser_omp_var_list (parser, OMP_CLAUSE_ERROR, NULL);
26011 cp_parser_require_pragma_eol (parser, pragma_tok);
26013 finish_omp_flush ();
26016 /* Helper function, to parse omp for increment expression. */
26019 cp_parser_omp_for_cond (cp_parser *parser, tree decl)
26021 tree cond = cp_parser_binary_expression (parser, false, true,
26022 PREC_NOT_OPERATOR, NULL);
26023 if (cond == error_mark_node
26024 || cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
26026 cp_parser_skip_to_end_of_statement (parser);
26027 return error_mark_node;
26030 switch (TREE_CODE (cond))
26038 return error_mark_node;
26041 /* If decl is an iterator, preserve LHS and RHS of the relational
26042 expr until finish_omp_for. */
26044 && (type_dependent_expression_p (decl)
26045 || CLASS_TYPE_P (TREE_TYPE (decl))))
26048 return build_x_binary_op (TREE_CODE (cond),
26049 TREE_OPERAND (cond, 0), ERROR_MARK,
26050 TREE_OPERAND (cond, 1), ERROR_MARK,
26051 /*overload=*/NULL, tf_warning_or_error);
26054 /* Helper function, to parse omp for increment expression. */
26057 cp_parser_omp_for_incr (cp_parser *parser, tree decl)
26059 cp_token *token = cp_lexer_peek_token (parser->lexer);
26065 if (token->type == CPP_PLUS_PLUS || token->type == CPP_MINUS_MINUS)
26067 op = (token->type == CPP_PLUS_PLUS
26068 ? PREINCREMENT_EXPR : PREDECREMENT_EXPR);
26069 cp_lexer_consume_token (parser->lexer);
26070 lhs = cp_parser_cast_expression (parser, false, false, NULL);
26072 return error_mark_node;
26073 return build2 (op, TREE_TYPE (decl), decl, NULL_TREE);
26076 lhs = cp_parser_primary_expression (parser, false, false, false, &idk);
26078 return error_mark_node;
26080 token = cp_lexer_peek_token (parser->lexer);
26081 if (token->type == CPP_PLUS_PLUS || token->type == CPP_MINUS_MINUS)
26083 op = (token->type == CPP_PLUS_PLUS
26084 ? POSTINCREMENT_EXPR : POSTDECREMENT_EXPR);
26085 cp_lexer_consume_token (parser->lexer);
26086 return build2 (op, TREE_TYPE (decl), decl, NULL_TREE);
26089 op = cp_parser_assignment_operator_opt (parser);
26090 if (op == ERROR_MARK)
26091 return error_mark_node;
26093 if (op != NOP_EXPR)
26095 rhs = cp_parser_assignment_expression (parser, false, NULL);
26096 rhs = build2 (op, TREE_TYPE (decl), decl, rhs);
26097 return build2 (MODIFY_EXPR, TREE_TYPE (decl), decl, rhs);
26100 lhs = cp_parser_binary_expression (parser, false, false,
26101 PREC_ADDITIVE_EXPRESSION, NULL);
26102 token = cp_lexer_peek_token (parser->lexer);
26103 decl_first = lhs == decl;
26106 if (token->type != CPP_PLUS
26107 && token->type != CPP_MINUS)
26108 return error_mark_node;
26112 op = token->type == CPP_PLUS ? PLUS_EXPR : MINUS_EXPR;
26113 cp_lexer_consume_token (parser->lexer);
26114 rhs = cp_parser_binary_expression (parser, false, false,
26115 PREC_ADDITIVE_EXPRESSION, NULL);
26116 token = cp_lexer_peek_token (parser->lexer);
26117 if (token->type == CPP_PLUS || token->type == CPP_MINUS || decl_first)
26119 if (lhs == NULL_TREE)
26121 if (op == PLUS_EXPR)
26124 lhs = build_x_unary_op (NEGATE_EXPR, rhs, tf_warning_or_error);
26127 lhs = build_x_binary_op (op, lhs, ERROR_MARK, rhs, ERROR_MARK,
26128 NULL, tf_warning_or_error);
26131 while (token->type == CPP_PLUS || token->type == CPP_MINUS);
26135 if (rhs != decl || op == MINUS_EXPR)
26136 return error_mark_node;
26137 rhs = build2 (op, TREE_TYPE (decl), lhs, decl);
26140 rhs = build2 (PLUS_EXPR, TREE_TYPE (decl), decl, lhs);
26142 return build2 (MODIFY_EXPR, TREE_TYPE (decl), decl, rhs);
26145 /* Parse the restricted form of the for statement allowed by OpenMP. */
26148 cp_parser_omp_for_loop (cp_parser *parser, tree clauses, tree *par_clauses)
26150 tree init, cond, incr, body, decl, pre_body = NULL_TREE, ret;
26151 tree real_decl, initv, condv, incrv, declv;
26152 tree this_pre_body, cl;
26153 location_t loc_first;
26154 bool collapse_err = false;
26155 int i, collapse = 1, nbraces = 0;
26156 VEC(tree,gc) *for_block = make_tree_vector ();
26158 for (cl = clauses; cl; cl = OMP_CLAUSE_CHAIN (cl))
26159 if (OMP_CLAUSE_CODE (cl) == OMP_CLAUSE_COLLAPSE)
26160 collapse = tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl), 0);
26162 gcc_assert (collapse >= 1);
26164 declv = make_tree_vec (collapse);
26165 initv = make_tree_vec (collapse);
26166 condv = make_tree_vec (collapse);
26167 incrv = make_tree_vec (collapse);
26169 loc_first = cp_lexer_peek_token (parser->lexer)->location;
26171 for (i = 0; i < collapse; i++)
26173 int bracecount = 0;
26174 bool add_private_clause = false;
26177 if (!cp_lexer_next_token_is_keyword (parser->lexer, RID_FOR))
26179 cp_parser_error (parser, "for statement expected");
26182 loc = cp_lexer_consume_token (parser->lexer)->location;
26184 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
26187 init = decl = real_decl = NULL;
26188 this_pre_body = push_stmt_list ();
26189 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
26191 /* See 2.5.1 (in OpenMP 3.0, similar wording is in 2.5 standard too):
26195 integer-type var = lb
26196 random-access-iterator-type var = lb
26197 pointer-type var = lb
26199 cp_decl_specifier_seq type_specifiers;
26201 /* First, try to parse as an initialized declaration. See
26202 cp_parser_condition, from whence the bulk of this is copied. */
26204 cp_parser_parse_tentatively (parser);
26205 cp_parser_type_specifier_seq (parser, /*is_declaration=*/true,
26206 /*is_trailing_return=*/false,
26208 if (cp_parser_parse_definitely (parser))
26210 /* If parsing a type specifier seq succeeded, then this
26211 MUST be a initialized declaration. */
26212 tree asm_specification, attributes;
26213 cp_declarator *declarator;
26215 declarator = cp_parser_declarator (parser,
26216 CP_PARSER_DECLARATOR_NAMED,
26217 /*ctor_dtor_or_conv_p=*/NULL,
26218 /*parenthesized_p=*/NULL,
26219 /*member_p=*/false);
26220 attributes = cp_parser_attributes_opt (parser);
26221 asm_specification = cp_parser_asm_specification_opt (parser);
26223 if (declarator == cp_error_declarator)
26224 cp_parser_skip_to_end_of_statement (parser);
26228 tree pushed_scope, auto_node;
26230 decl = start_decl (declarator, &type_specifiers,
26231 SD_INITIALIZED, attributes,
26232 /*prefix_attributes=*/NULL_TREE,
26235 auto_node = type_uses_auto (TREE_TYPE (decl));
26236 if (cp_lexer_next_token_is_not (parser->lexer, CPP_EQ))
26238 if (cp_lexer_next_token_is (parser->lexer,
26240 error ("parenthesized initialization is not allowed in "
26241 "OpenMP %<for%> loop");
26243 /* Trigger an error. */
26244 cp_parser_require (parser, CPP_EQ, RT_EQ);
26246 init = error_mark_node;
26247 cp_parser_skip_to_end_of_statement (parser);
26249 else if (CLASS_TYPE_P (TREE_TYPE (decl))
26250 || type_dependent_expression_p (decl)
26253 bool is_direct_init, is_non_constant_init;
26255 init = cp_parser_initializer (parser,
26257 &is_non_constant_init);
26262 = do_auto_deduction (TREE_TYPE (decl), init,
26265 if (!CLASS_TYPE_P (TREE_TYPE (decl))
26266 && !type_dependent_expression_p (decl))
26270 cp_finish_decl (decl, init, !is_non_constant_init,
26272 LOOKUP_ONLYCONVERTING);
26273 if (CLASS_TYPE_P (TREE_TYPE (decl)))
26275 VEC_safe_push (tree, gc, for_block, this_pre_body);
26279 init = pop_stmt_list (this_pre_body);
26280 this_pre_body = NULL_TREE;
26285 cp_lexer_consume_token (parser->lexer);
26286 init = cp_parser_assignment_expression (parser, false, NULL);
26289 if (TREE_CODE (TREE_TYPE (decl)) == REFERENCE_TYPE)
26290 init = error_mark_node;
26292 cp_finish_decl (decl, NULL_TREE,
26293 /*init_const_expr_p=*/false,
26295 LOOKUP_ONLYCONVERTING);
26299 pop_scope (pushed_scope);
26305 /* If parsing a type specifier sequence failed, then
26306 this MUST be a simple expression. */
26307 cp_parser_parse_tentatively (parser);
26308 decl = cp_parser_primary_expression (parser, false, false,
26310 if (!cp_parser_error_occurred (parser)
26313 && CLASS_TYPE_P (TREE_TYPE (decl)))
26317 cp_parser_parse_definitely (parser);
26318 cp_parser_require (parser, CPP_EQ, RT_EQ);
26319 rhs = cp_parser_assignment_expression (parser, false, NULL);
26320 finish_expr_stmt (build_x_modify_expr (decl, NOP_EXPR,
26322 tf_warning_or_error));
26323 add_private_clause = true;
26328 cp_parser_abort_tentative_parse (parser);
26329 init = cp_parser_expression (parser, false, NULL);
26332 if (TREE_CODE (init) == MODIFY_EXPR
26333 || TREE_CODE (init) == MODOP_EXPR)
26334 real_decl = TREE_OPERAND (init, 0);
26339 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
26342 this_pre_body = pop_stmt_list (this_pre_body);
26346 pre_body = push_stmt_list ();
26348 add_stmt (this_pre_body);
26349 pre_body = pop_stmt_list (pre_body);
26352 pre_body = this_pre_body;
26357 if (par_clauses != NULL && real_decl != NULL_TREE)
26360 for (c = par_clauses; *c ; )
26361 if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_FIRSTPRIVATE
26362 && OMP_CLAUSE_DECL (*c) == real_decl)
26364 error_at (loc, "iteration variable %qD"
26365 " should not be firstprivate", real_decl);
26366 *c = OMP_CLAUSE_CHAIN (*c);
26368 else if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_LASTPRIVATE
26369 && OMP_CLAUSE_DECL (*c) == real_decl)
26371 /* Add lastprivate (decl) clause to OMP_FOR_CLAUSES,
26372 change it to shared (decl) in OMP_PARALLEL_CLAUSES. */
26373 tree l = build_omp_clause (loc, OMP_CLAUSE_LASTPRIVATE);
26374 OMP_CLAUSE_DECL (l) = real_decl;
26375 OMP_CLAUSE_CHAIN (l) = clauses;
26376 CP_OMP_CLAUSE_INFO (l) = CP_OMP_CLAUSE_INFO (*c);
26378 OMP_CLAUSE_SET_CODE (*c, OMP_CLAUSE_SHARED);
26379 CP_OMP_CLAUSE_INFO (*c) = NULL;
26380 add_private_clause = false;
26384 if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_PRIVATE
26385 && OMP_CLAUSE_DECL (*c) == real_decl)
26386 add_private_clause = false;
26387 c = &OMP_CLAUSE_CHAIN (*c);
26391 if (add_private_clause)
26394 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
26396 if ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_PRIVATE
26397 || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE)
26398 && OMP_CLAUSE_DECL (c) == decl)
26400 else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE
26401 && OMP_CLAUSE_DECL (c) == decl)
26402 error_at (loc, "iteration variable %qD "
26403 "should not be firstprivate",
26405 else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION
26406 && OMP_CLAUSE_DECL (c) == decl)
26407 error_at (loc, "iteration variable %qD should not be reduction",
26412 c = build_omp_clause (loc, OMP_CLAUSE_PRIVATE);
26413 OMP_CLAUSE_DECL (c) = decl;
26414 c = finish_omp_clauses (c);
26417 OMP_CLAUSE_CHAIN (c) = clauses;
26424 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
26425 cond = cp_parser_omp_for_cond (parser, decl);
26426 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
26429 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN))
26431 /* If decl is an iterator, preserve the operator on decl
26432 until finish_omp_for. */
26434 && ((processing_template_decl
26435 && !POINTER_TYPE_P (TREE_TYPE (real_decl)))
26436 || CLASS_TYPE_P (TREE_TYPE (real_decl))))
26437 incr = cp_parser_omp_for_incr (parser, real_decl);
26439 incr = cp_parser_expression (parser, false, NULL);
26442 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
26443 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
26444 /*or_comma=*/false,
26445 /*consume_paren=*/true);
26447 TREE_VEC_ELT (declv, i) = decl;
26448 TREE_VEC_ELT (initv, i) = init;
26449 TREE_VEC_ELT (condv, i) = cond;
26450 TREE_VEC_ELT (incrv, i) = incr;
26452 if (i == collapse - 1)
26455 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
26456 in between the collapsed for loops to be still considered perfectly
26457 nested. Hopefully the final version clarifies this.
26458 For now handle (multiple) {'s and empty statements. */
26459 cp_parser_parse_tentatively (parser);
26462 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_FOR))
26464 else if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
26466 cp_lexer_consume_token (parser->lexer);
26469 else if (bracecount
26470 && cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
26471 cp_lexer_consume_token (parser->lexer);
26474 loc = cp_lexer_peek_token (parser->lexer)->location;
26475 error_at (loc, "not enough collapsed for loops");
26476 collapse_err = true;
26477 cp_parser_abort_tentative_parse (parser);
26486 cp_parser_parse_definitely (parser);
26487 nbraces += bracecount;
26491 /* Note that we saved the original contents of this flag when we entered
26492 the structured block, and so we don't need to re-save it here. */
26493 parser->in_statement = IN_OMP_FOR;
26495 /* Note that the grammar doesn't call for a structured block here,
26496 though the loop as a whole is a structured block. */
26497 body = push_stmt_list ();
26498 cp_parser_statement (parser, NULL_TREE, false, NULL);
26499 body = pop_stmt_list (body);
26501 if (declv == NULL_TREE)
26504 ret = finish_omp_for (loc_first, declv, initv, condv, incrv, body,
26505 pre_body, clauses);
26509 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
26511 cp_lexer_consume_token (parser->lexer);
26514 else if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
26515 cp_lexer_consume_token (parser->lexer);
26520 error_at (cp_lexer_peek_token (parser->lexer)->location,
26521 "collapsed loops not perfectly nested");
26523 collapse_err = true;
26524 cp_parser_statement_seq_opt (parser, NULL);
26525 if (cp_lexer_next_token_is (parser->lexer, CPP_EOF))
26530 while (!VEC_empty (tree, for_block))
26531 add_stmt (pop_stmt_list (VEC_pop (tree, for_block)));
26532 release_tree_vector (for_block);
26538 #pragma omp for for-clause[optseq] new-line
26541 #define OMP_FOR_CLAUSE_MASK \
26542 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
26543 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
26544 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
26545 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
26546 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
26547 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
26548 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT) \
26549 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE))
26552 cp_parser_omp_for (cp_parser *parser, cp_token *pragma_tok)
26554 tree clauses, sb, ret;
26557 clauses = cp_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK,
26558 "#pragma omp for", pragma_tok);
26560 sb = begin_omp_structured_block ();
26561 save = cp_parser_begin_omp_structured_block (parser);
26563 ret = cp_parser_omp_for_loop (parser, clauses, NULL);
26565 cp_parser_end_omp_structured_block (parser, save);
26566 add_stmt (finish_omp_structured_block (sb));
26572 # pragma omp master new-line
26573 structured-block */
26576 cp_parser_omp_master (cp_parser *parser, cp_token *pragma_tok)
26578 cp_parser_require_pragma_eol (parser, pragma_tok);
26579 return c_finish_omp_master (input_location,
26580 cp_parser_omp_structured_block (parser));
26584 # pragma omp ordered new-line
26585 structured-block */
26588 cp_parser_omp_ordered (cp_parser *parser, cp_token *pragma_tok)
26590 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
26591 cp_parser_require_pragma_eol (parser, pragma_tok);
26592 return c_finish_omp_ordered (loc, cp_parser_omp_structured_block (parser));
26598 { section-sequence }
26601 section-directive[opt] structured-block
26602 section-sequence section-directive structured-block */
26605 cp_parser_omp_sections_scope (cp_parser *parser)
26607 tree stmt, substmt;
26608 bool error_suppress = false;
26611 if (!cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE))
26614 stmt = push_stmt_list ();
26616 if (cp_lexer_peek_token (parser->lexer)->pragma_kind != PRAGMA_OMP_SECTION)
26620 substmt = begin_omp_structured_block ();
26621 save = cp_parser_begin_omp_structured_block (parser);
26625 cp_parser_statement (parser, NULL_TREE, false, NULL);
26627 tok = cp_lexer_peek_token (parser->lexer);
26628 if (tok->pragma_kind == PRAGMA_OMP_SECTION)
26630 if (tok->type == CPP_CLOSE_BRACE)
26632 if (tok->type == CPP_EOF)
26636 cp_parser_end_omp_structured_block (parser, save);
26637 substmt = finish_omp_structured_block (substmt);
26638 substmt = build1 (OMP_SECTION, void_type_node, substmt);
26639 add_stmt (substmt);
26644 tok = cp_lexer_peek_token (parser->lexer);
26645 if (tok->type == CPP_CLOSE_BRACE)
26647 if (tok->type == CPP_EOF)
26650 if (tok->pragma_kind == PRAGMA_OMP_SECTION)
26652 cp_lexer_consume_token (parser->lexer);
26653 cp_parser_require_pragma_eol (parser, tok);
26654 error_suppress = false;
26656 else if (!error_suppress)
26658 cp_parser_error (parser, "expected %<#pragma omp section%> or %<}%>");
26659 error_suppress = true;
26662 substmt = cp_parser_omp_structured_block (parser);
26663 substmt = build1 (OMP_SECTION, void_type_node, substmt);
26664 add_stmt (substmt);
26666 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
26668 substmt = pop_stmt_list (stmt);
26670 stmt = make_node (OMP_SECTIONS);
26671 TREE_TYPE (stmt) = void_type_node;
26672 OMP_SECTIONS_BODY (stmt) = substmt;
26679 # pragma omp sections sections-clause[optseq] newline
26682 #define OMP_SECTIONS_CLAUSE_MASK \
26683 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
26684 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
26685 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
26686 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
26687 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
26690 cp_parser_omp_sections (cp_parser *parser, cp_token *pragma_tok)
26694 clauses = cp_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK,
26695 "#pragma omp sections", pragma_tok);
26697 ret = cp_parser_omp_sections_scope (parser);
26699 OMP_SECTIONS_CLAUSES (ret) = clauses;
26705 # pragma parallel parallel-clause new-line
26706 # pragma parallel for parallel-for-clause new-line
26707 # pragma parallel sections parallel-sections-clause new-line */
26709 #define OMP_PARALLEL_CLAUSE_MASK \
26710 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
26711 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
26712 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
26713 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
26714 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
26715 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
26716 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
26717 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
26720 cp_parser_omp_parallel (cp_parser *parser, cp_token *pragma_tok)
26722 enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL;
26723 const char *p_name = "#pragma omp parallel";
26724 tree stmt, clauses, par_clause, ws_clause, block;
26725 unsigned int mask = OMP_PARALLEL_CLAUSE_MASK;
26727 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
26729 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_FOR))
26731 cp_lexer_consume_token (parser->lexer);
26732 p_kind = PRAGMA_OMP_PARALLEL_FOR;
26733 p_name = "#pragma omp parallel for";
26734 mask |= OMP_FOR_CLAUSE_MASK;
26735 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
26737 else if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
26739 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
26740 const char *p = IDENTIFIER_POINTER (id);
26741 if (strcmp (p, "sections") == 0)
26743 cp_lexer_consume_token (parser->lexer);
26744 p_kind = PRAGMA_OMP_PARALLEL_SECTIONS;
26745 p_name = "#pragma omp parallel sections";
26746 mask |= OMP_SECTIONS_CLAUSE_MASK;
26747 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
26751 clauses = cp_parser_omp_all_clauses (parser, mask, p_name, pragma_tok);
26752 block = begin_omp_parallel ();
26753 save = cp_parser_begin_omp_structured_block (parser);
26757 case PRAGMA_OMP_PARALLEL:
26758 cp_parser_statement (parser, NULL_TREE, false, NULL);
26759 par_clause = clauses;
26762 case PRAGMA_OMP_PARALLEL_FOR:
26763 c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause);
26764 cp_parser_omp_for_loop (parser, ws_clause, &par_clause);
26767 case PRAGMA_OMP_PARALLEL_SECTIONS:
26768 c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause);
26769 stmt = cp_parser_omp_sections_scope (parser);
26771 OMP_SECTIONS_CLAUSES (stmt) = ws_clause;
26775 gcc_unreachable ();
26778 cp_parser_end_omp_structured_block (parser, save);
26779 stmt = finish_omp_parallel (par_clause, block);
26780 if (p_kind != PRAGMA_OMP_PARALLEL)
26781 OMP_PARALLEL_COMBINED (stmt) = 1;
26786 # pragma omp single single-clause[optseq] new-line
26787 structured-block */
26789 #define OMP_SINGLE_CLAUSE_MASK \
26790 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
26791 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
26792 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
26793 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
26796 cp_parser_omp_single (cp_parser *parser, cp_token *pragma_tok)
26798 tree stmt = make_node (OMP_SINGLE);
26799 TREE_TYPE (stmt) = void_type_node;
26801 OMP_SINGLE_CLAUSES (stmt)
26802 = cp_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK,
26803 "#pragma omp single", pragma_tok);
26804 OMP_SINGLE_BODY (stmt) = cp_parser_omp_structured_block (parser);
26806 return add_stmt (stmt);
26810 # pragma omp task task-clause[optseq] new-line
26811 structured-block */
26813 #define OMP_TASK_CLAUSE_MASK \
26814 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
26815 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
26816 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
26817 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
26818 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
26819 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
26820 | (1u << PRAGMA_OMP_CLAUSE_FINAL) \
26821 | (1u << PRAGMA_OMP_CLAUSE_MERGEABLE))
26824 cp_parser_omp_task (cp_parser *parser, cp_token *pragma_tok)
26826 tree clauses, block;
26829 clauses = cp_parser_omp_all_clauses (parser, OMP_TASK_CLAUSE_MASK,
26830 "#pragma omp task", pragma_tok);
26831 block = begin_omp_task ();
26832 save = cp_parser_begin_omp_structured_block (parser);
26833 cp_parser_statement (parser, NULL_TREE, false, NULL);
26834 cp_parser_end_omp_structured_block (parser, save);
26835 return finish_omp_task (clauses, block);
26839 # pragma omp taskwait new-line */
26842 cp_parser_omp_taskwait (cp_parser *parser, cp_token *pragma_tok)
26844 cp_parser_require_pragma_eol (parser, pragma_tok);
26845 finish_omp_taskwait ();
26849 # pragma omp taskyield new-line */
26852 cp_parser_omp_taskyield (cp_parser *parser, cp_token *pragma_tok)
26854 cp_parser_require_pragma_eol (parser, pragma_tok);
26855 finish_omp_taskyield ();
26859 # pragma omp threadprivate (variable-list) */
26862 cp_parser_omp_threadprivate (cp_parser *parser, cp_token *pragma_tok)
26866 vars = cp_parser_omp_var_list (parser, OMP_CLAUSE_ERROR, NULL);
26867 cp_parser_require_pragma_eol (parser, pragma_tok);
26869 finish_omp_threadprivate (vars);
26872 /* Main entry point to OpenMP statement pragmas. */
26875 cp_parser_omp_construct (cp_parser *parser, cp_token *pragma_tok)
26879 switch (pragma_tok->pragma_kind)
26881 case PRAGMA_OMP_ATOMIC:
26882 cp_parser_omp_atomic (parser, pragma_tok);
26884 case PRAGMA_OMP_CRITICAL:
26885 stmt = cp_parser_omp_critical (parser, pragma_tok);
26887 case PRAGMA_OMP_FOR:
26888 stmt = cp_parser_omp_for (parser, pragma_tok);
26890 case PRAGMA_OMP_MASTER:
26891 stmt = cp_parser_omp_master (parser, pragma_tok);
26893 case PRAGMA_OMP_ORDERED:
26894 stmt = cp_parser_omp_ordered (parser, pragma_tok);
26896 case PRAGMA_OMP_PARALLEL:
26897 stmt = cp_parser_omp_parallel (parser, pragma_tok);
26899 case PRAGMA_OMP_SECTIONS:
26900 stmt = cp_parser_omp_sections (parser, pragma_tok);
26902 case PRAGMA_OMP_SINGLE:
26903 stmt = cp_parser_omp_single (parser, pragma_tok);
26905 case PRAGMA_OMP_TASK:
26906 stmt = cp_parser_omp_task (parser, pragma_tok);
26909 gcc_unreachable ();
26913 SET_EXPR_LOCATION (stmt, pragma_tok->location);
26916 /* Transactional Memory parsing routines. */
26918 /* Parse a transaction attribute.
26924 ??? Simplify this when C++0x bracket attributes are
26925 implemented properly. */
26928 cp_parser_txn_attribute_opt (cp_parser *parser)
26931 tree attr_name, attr = NULL;
26933 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_ATTRIBUTE))
26934 return cp_parser_attributes_opt (parser);
26936 if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_SQUARE))
26938 cp_lexer_consume_token (parser->lexer);
26939 if (!cp_parser_require (parser, CPP_OPEN_SQUARE, RT_OPEN_SQUARE))
26942 token = cp_lexer_peek_token (parser->lexer);
26943 if (token->type == CPP_NAME || token->type == CPP_KEYWORD)
26945 token = cp_lexer_consume_token (parser->lexer);
26947 attr_name = (token->type == CPP_KEYWORD
26948 /* For keywords, use the canonical spelling,
26949 not the parsed identifier. */
26950 ? ridpointers[(int) token->keyword]
26952 attr = build_tree_list (attr_name, NULL_TREE);
26955 cp_parser_error (parser, "expected identifier");
26957 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
26959 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
26963 /* Parse a __transaction_atomic or __transaction_relaxed statement.
26965 transaction-statement:
26966 __transaction_atomic txn-attribute[opt] txn-noexcept-spec[opt]
26968 __transaction_relaxed txn-noexcept-spec[opt] compound-statement
26972 cp_parser_transaction (cp_parser *parser, enum rid keyword)
26974 unsigned char old_in = parser->in_transaction;
26975 unsigned char this_in = 1, new_in;
26977 tree stmt, attrs, noex;
26979 gcc_assert (keyword == RID_TRANSACTION_ATOMIC
26980 || keyword == RID_TRANSACTION_RELAXED);
26981 token = cp_parser_require_keyword (parser, keyword,
26982 (keyword == RID_TRANSACTION_ATOMIC ? RT_TRANSACTION_ATOMIC
26983 : RT_TRANSACTION_RELAXED));
26984 gcc_assert (token != NULL);
26986 if (keyword == RID_TRANSACTION_RELAXED)
26987 this_in |= TM_STMT_ATTR_RELAXED;
26990 attrs = cp_parser_txn_attribute_opt (parser);
26992 this_in |= parse_tm_stmt_attr (attrs, TM_STMT_ATTR_OUTER);
26995 /* Parse a noexcept specification. */
26996 noex = cp_parser_noexcept_specification_opt (parser, true, NULL, true);
26998 /* Keep track if we're in the lexical scope of an outer transaction. */
26999 new_in = this_in | (old_in & TM_STMT_ATTR_OUTER);
27001 stmt = begin_transaction_stmt (token->location, NULL, this_in);
27003 parser->in_transaction = new_in;
27004 cp_parser_compound_statement (parser, NULL, false, false);
27005 parser->in_transaction = old_in;
27007 finish_transaction_stmt (stmt, NULL, this_in, noex);
27012 /* Parse a __transaction_atomic or __transaction_relaxed expression.
27014 transaction-expression:
27015 __transaction_atomic txn-noexcept-spec[opt] ( expression )
27016 __transaction_relaxed txn-noexcept-spec[opt] ( expression )
27020 cp_parser_transaction_expression (cp_parser *parser, enum rid keyword)
27022 unsigned char old_in = parser->in_transaction;
27023 unsigned char this_in = 1;
27028 gcc_assert (keyword == RID_TRANSACTION_ATOMIC
27029 || keyword == RID_TRANSACTION_RELAXED);
27032 error (keyword == RID_TRANSACTION_RELAXED
27033 ? G_("%<__transaction_relaxed%> without transactional memory "
27035 : G_("%<__transaction_atomic%> without transactional memory "
27036 "support enabled"));
27038 token = cp_parser_require_keyword (parser, keyword,
27039 (keyword == RID_TRANSACTION_ATOMIC ? RT_TRANSACTION_ATOMIC
27040 : RT_TRANSACTION_RELAXED));
27041 gcc_assert (token != NULL);
27043 if (keyword == RID_TRANSACTION_RELAXED)
27044 this_in |= TM_STMT_ATTR_RELAXED;
27046 /* Set this early. This might mean that we allow transaction_cancel in
27047 an expression that we find out later actually has to be a constexpr.
27048 However, we expect that cxx_constant_value will be able to deal with
27049 this; also, if the noexcept has no constexpr, then what we parse next
27050 really is a transaction's body. */
27051 parser->in_transaction = this_in;
27053 /* Parse a noexcept specification. */
27054 noex = cp_parser_noexcept_specification_opt (parser, false, &noex_expr,
27057 if (!noex || !noex_expr
27058 || cp_lexer_peek_token (parser->lexer)->type == CPP_OPEN_PAREN)
27060 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
27062 expr = cp_parser_expression (parser, /*cast_p=*/false, NULL);
27063 finish_parenthesized_expr (expr);
27065 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
27069 /* The only expression that is available got parsed for the noexcept
27070 already. noexcept is true then. */
27072 noex = boolean_true_node;
27075 expr = build_transaction_expr (token->location, expr, this_in, noex);
27076 parser->in_transaction = old_in;
27078 if (cp_parser_non_integral_constant_expression (parser, NIC_TRANSACTION))
27079 return error_mark_node;
27081 return (flag_tm ? expr : error_mark_node);
27084 /* Parse a function-transaction-block.
27086 function-transaction-block:
27087 __transaction_atomic txn-attribute[opt] ctor-initializer[opt]
27089 __transaction_atomic txn-attribute[opt] function-try-block
27090 __transaction_relaxed ctor-initializer[opt] function-body
27091 __transaction_relaxed function-try-block
27095 cp_parser_function_transaction (cp_parser *parser, enum rid keyword)
27097 unsigned char old_in = parser->in_transaction;
27098 unsigned char new_in = 1;
27099 tree compound_stmt, stmt, attrs;
27100 bool ctor_initializer_p;
27103 gcc_assert (keyword == RID_TRANSACTION_ATOMIC
27104 || keyword == RID_TRANSACTION_RELAXED);
27105 token = cp_parser_require_keyword (parser, keyword,
27106 (keyword == RID_TRANSACTION_ATOMIC ? RT_TRANSACTION_ATOMIC
27107 : RT_TRANSACTION_RELAXED));
27108 gcc_assert (token != NULL);
27110 if (keyword == RID_TRANSACTION_RELAXED)
27111 new_in |= TM_STMT_ATTR_RELAXED;
27114 attrs = cp_parser_txn_attribute_opt (parser);
27116 new_in |= parse_tm_stmt_attr (attrs, TM_STMT_ATTR_OUTER);
27119 stmt = begin_transaction_stmt (token->location, &compound_stmt, new_in);
27121 parser->in_transaction = new_in;
27123 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TRY))
27124 ctor_initializer_p = cp_parser_function_try_block (parser);
27127 = cp_parser_ctor_initializer_opt_and_function_body (parser);
27129 parser->in_transaction = old_in;
27131 finish_transaction_stmt (stmt, compound_stmt, new_in, NULL_TREE);
27133 return ctor_initializer_p;
27136 /* Parse a __transaction_cancel statement.
27139 __transaction_cancel txn-attribute[opt] ;
27140 __transaction_cancel txn-attribute[opt] throw-expression ;
27142 ??? Cancel and throw is not yet implemented. */
27145 cp_parser_transaction_cancel (cp_parser *parser)
27148 bool is_outer = false;
27151 token = cp_parser_require_keyword (parser, RID_TRANSACTION_CANCEL,
27152 RT_TRANSACTION_CANCEL);
27153 gcc_assert (token != NULL);
27155 attrs = cp_parser_txn_attribute_opt (parser);
27157 is_outer = (parse_tm_stmt_attr (attrs, TM_STMT_ATTR_OUTER) != 0);
27159 /* ??? Parse cancel-and-throw here. */
27161 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
27165 error_at (token->location, "%<__transaction_cancel%> without "
27166 "transactional memory support enabled");
27167 return error_mark_node;
27169 else if (parser->in_transaction & TM_STMT_ATTR_RELAXED)
27171 error_at (token->location, "%<__transaction_cancel%> within a "
27172 "%<__transaction_relaxed%>");
27173 return error_mark_node;
27177 if ((parser->in_transaction & TM_STMT_ATTR_OUTER) == 0
27178 && !is_tm_may_cancel_outer (current_function_decl))
27180 error_at (token->location, "outer %<__transaction_cancel%> not "
27181 "within outer %<__transaction_atomic%>");
27182 error_at (token->location,
27183 " or a %<transaction_may_cancel_outer%> function");
27184 return error_mark_node;
27187 else if (parser->in_transaction == 0)
27189 error_at (token->location, "%<__transaction_cancel%> not within "
27190 "%<__transaction_atomic%>");
27191 return error_mark_node;
27194 stmt = build_tm_abort_call (token->location, is_outer);
27203 static GTY (()) cp_parser *the_parser;
27206 /* Special handling for the first token or line in the file. The first
27207 thing in the file might be #pragma GCC pch_preprocess, which loads a
27208 PCH file, which is a GC collection point. So we need to handle this
27209 first pragma without benefit of an existing lexer structure.
27211 Always returns one token to the caller in *FIRST_TOKEN. This is
27212 either the true first token of the file, or the first token after
27213 the initial pragma. */
27216 cp_parser_initial_pragma (cp_token *first_token)
27220 cp_lexer_get_preprocessor_token (NULL, first_token);
27221 if (first_token->pragma_kind != PRAGMA_GCC_PCH_PREPROCESS)
27224 cp_lexer_get_preprocessor_token (NULL, first_token);
27225 if (first_token->type == CPP_STRING)
27227 name = first_token->u.value;
27229 cp_lexer_get_preprocessor_token (NULL, first_token);
27230 if (first_token->type != CPP_PRAGMA_EOL)
27231 error_at (first_token->location,
27232 "junk at end of %<#pragma GCC pch_preprocess%>");
27235 error_at (first_token->location, "expected string literal");
27237 /* Skip to the end of the pragma. */
27238 while (first_token->type != CPP_PRAGMA_EOL && first_token->type != CPP_EOF)
27239 cp_lexer_get_preprocessor_token (NULL, first_token);
27241 /* Now actually load the PCH file. */
27243 c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name));
27245 /* Read one more token to return to our caller. We have to do this
27246 after reading the PCH file in, since its pointers have to be
27248 cp_lexer_get_preprocessor_token (NULL, first_token);
27251 /* Normal parsing of a pragma token. Here we can (and must) use the
27255 cp_parser_pragma (cp_parser *parser, enum pragma_context context)
27257 cp_token *pragma_tok;
27260 pragma_tok = cp_lexer_consume_token (parser->lexer);
27261 gcc_assert (pragma_tok->type == CPP_PRAGMA);
27262 parser->lexer->in_pragma = true;
27264 id = pragma_tok->pragma_kind;
27267 case PRAGMA_GCC_PCH_PREPROCESS:
27268 error_at (pragma_tok->location,
27269 "%<#pragma GCC pch_preprocess%> must be first");
27272 case PRAGMA_OMP_BARRIER:
27275 case pragma_compound:
27276 cp_parser_omp_barrier (parser, pragma_tok);
27279 error_at (pragma_tok->location, "%<#pragma omp barrier%> may only be "
27280 "used in compound statements");
27287 case PRAGMA_OMP_FLUSH:
27290 case pragma_compound:
27291 cp_parser_omp_flush (parser, pragma_tok);
27294 error_at (pragma_tok->location, "%<#pragma omp flush%> may only be "
27295 "used in compound statements");
27302 case PRAGMA_OMP_TASKWAIT:
27305 case pragma_compound:
27306 cp_parser_omp_taskwait (parser, pragma_tok);
27309 error_at (pragma_tok->location,
27310 "%<#pragma omp taskwait%> may only be "
27311 "used in compound statements");
27318 case PRAGMA_OMP_TASKYIELD:
27321 case pragma_compound:
27322 cp_parser_omp_taskyield (parser, pragma_tok);
27325 error_at (pragma_tok->location,
27326 "%<#pragma omp taskyield%> may only be "
27327 "used in compound statements");
27334 case PRAGMA_OMP_THREADPRIVATE:
27335 cp_parser_omp_threadprivate (parser, pragma_tok);
27338 case PRAGMA_OMP_ATOMIC:
27339 case PRAGMA_OMP_CRITICAL:
27340 case PRAGMA_OMP_FOR:
27341 case PRAGMA_OMP_MASTER:
27342 case PRAGMA_OMP_ORDERED:
27343 case PRAGMA_OMP_PARALLEL:
27344 case PRAGMA_OMP_SECTIONS:
27345 case PRAGMA_OMP_SINGLE:
27346 case PRAGMA_OMP_TASK:
27347 if (context == pragma_external)
27349 cp_parser_omp_construct (parser, pragma_tok);
27352 case PRAGMA_OMP_SECTION:
27353 error_at (pragma_tok->location,
27354 "%<#pragma omp section%> may only be used in "
27355 "%<#pragma omp sections%> construct");
27359 gcc_assert (id >= PRAGMA_FIRST_EXTERNAL);
27360 c_invoke_pragma_handler (id);
27364 cp_parser_error (parser, "expected declaration specifiers");
27368 cp_parser_skip_to_pragma_eol (parser, pragma_tok);
27372 /* The interface the pragma parsers have to the lexer. */
27375 pragma_lex (tree *value)
27378 enum cpp_ttype ret;
27380 tok = cp_lexer_peek_token (the_parser->lexer);
27383 *value = tok->u.value;
27385 if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF)
27387 else if (ret == CPP_STRING)
27388 *value = cp_parser_string_literal (the_parser, false, false);
27391 cp_lexer_consume_token (the_parser->lexer);
27392 if (ret == CPP_KEYWORD)
27400 /* External interface. */
27402 /* Parse one entire translation unit. */
27405 c_parse_file (void)
27407 static bool already_called = false;
27409 if (already_called)
27411 sorry ("inter-module optimizations not implemented for C++");
27414 already_called = true;
27416 the_parser = cp_parser_new ();
27417 push_deferring_access_checks (flag_access_control
27418 ? dk_no_deferred : dk_no_check);
27419 cp_parser_translation_unit (the_parser);
27423 #include "gt-cp-parser.h"