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 } non_integral_constant;
112 /* The various kinds of errors about name-lookup failing. */
113 typedef enum name_lookup_error {
118 /* is not a class or namespace */
120 /* is not a class, namespace, or enumeration */
124 /* The various kinds of required token */
125 typedef enum required_token {
127 RT_SEMICOLON, /* ';' */
128 RT_OPEN_PAREN, /* '(' */
129 RT_CLOSE_BRACE, /* '}' */
130 RT_OPEN_BRACE, /* '{' */
131 RT_CLOSE_SQUARE, /* ']' */
132 RT_OPEN_SQUARE, /* '[' */
136 RT_GREATER, /* '>' */
138 RT_ELLIPSIS, /* '...' */
142 RT_COLON_SCOPE, /* ':' or '::' */
143 RT_CLOSE_PAREN, /* ')' */
144 RT_COMMA_CLOSE_PAREN, /* ',' or ')' */
145 RT_PRAGMA_EOL, /* end of line */
146 RT_NAME, /* identifier */
148 /* The type is CPP_KEYWORD */
150 RT_DELETE, /* delete */
151 RT_RETURN, /* return */
152 RT_WHILE, /* while */
153 RT_EXTERN, /* extern */
154 RT_STATIC_ASSERT, /* static_assert */
155 RT_DECLTYPE, /* decltype */
156 RT_OPERATOR, /* operator */
157 RT_CLASS, /* class */
158 RT_TEMPLATE, /* template */
159 RT_NAMESPACE, /* namespace */
160 RT_USING, /* using */
163 RT_CATCH, /* catch */
164 RT_THROW, /* throw */
165 RT_LABEL, /* __label__ */
166 RT_AT_TRY, /* @try */
167 RT_AT_SYNCHRONIZED, /* @synchronized */
168 RT_AT_THROW, /* @throw */
170 RT_SELECT, /* selection-statement */
171 RT_INTERATION, /* iteration-statement */
172 RT_JUMP, /* jump-statement */
173 RT_CLASS_KEY, /* class-key */
174 RT_CLASS_TYPENAME_TEMPLATE /* class, typename, or template */
179 static cp_lexer *cp_lexer_new_main
181 static cp_lexer *cp_lexer_new_from_tokens
182 (cp_token_cache *tokens);
183 static void cp_lexer_destroy
185 static int cp_lexer_saving_tokens
187 static cp_token *cp_lexer_token_at
188 (cp_lexer *, cp_token_position);
189 static void cp_lexer_get_preprocessor_token
190 (cp_lexer *, cp_token *);
191 static inline cp_token *cp_lexer_peek_token
193 static cp_token *cp_lexer_peek_nth_token
194 (cp_lexer *, size_t);
195 static inline bool cp_lexer_next_token_is
196 (cp_lexer *, enum cpp_ttype);
197 static bool cp_lexer_next_token_is_not
198 (cp_lexer *, enum cpp_ttype);
199 static bool cp_lexer_next_token_is_keyword
200 (cp_lexer *, enum rid);
201 static cp_token *cp_lexer_consume_token
203 static void cp_lexer_purge_token
205 static void cp_lexer_purge_tokens_after
206 (cp_lexer *, cp_token_position);
207 static void cp_lexer_save_tokens
209 static void cp_lexer_commit_tokens
211 static void cp_lexer_rollback_tokens
213 #ifdef ENABLE_CHECKING
214 static void cp_lexer_print_token
215 (FILE *, cp_token *);
216 static inline bool cp_lexer_debugging_p
218 static void cp_lexer_start_debugging
219 (cp_lexer *) ATTRIBUTE_UNUSED;
220 static void cp_lexer_stop_debugging
221 (cp_lexer *) ATTRIBUTE_UNUSED;
223 /* If we define cp_lexer_debug_stream to NULL it will provoke warnings
224 about passing NULL to functions that require non-NULL arguments
225 (fputs, fprintf). It will never be used, so all we need is a value
226 of the right type that's guaranteed not to be NULL. */
227 #define cp_lexer_debug_stream stdout
228 #define cp_lexer_print_token(str, tok) (void) 0
229 #define cp_lexer_debugging_p(lexer) 0
230 #endif /* ENABLE_CHECKING */
232 static cp_token_cache *cp_token_cache_new
233 (cp_token *, cp_token *);
235 static void cp_parser_initial_pragma
238 /* Manifest constants. */
239 #define CP_LEXER_BUFFER_SIZE ((256 * 1024) / sizeof (cp_token))
240 #define CP_SAVED_TOKEN_STACK 5
244 #ifdef ENABLE_CHECKING
245 /* The stream to which debugging output should be written. */
246 static FILE *cp_lexer_debug_stream;
247 #endif /* ENABLE_CHECKING */
249 /* Nonzero if we are parsing an unevaluated operand: an operand to
250 sizeof, typeof, or alignof. */
251 int cp_unevaluated_operand;
253 #ifdef ENABLE_CHECKING
254 /* Dump up to NUM tokens in BUFFER to FILE. If NUM is 0, dump all the
258 cp_lexer_dump_tokens (FILE *file, VEC(cp_token,gc) *buffer, unsigned num)
263 fprintf (file, "%u tokens\n", VEC_length (cp_token, buffer));
266 num = VEC_length (cp_token, buffer);
268 for (i = 0; VEC_iterate (cp_token, buffer, i, token) && i < num; i++)
270 cp_lexer_print_token (file, token);
275 case CPP_CLOSE_BRACE:
285 if (i == num && i < VEC_length (cp_token, buffer))
287 fprintf (file, " ... ");
288 cp_lexer_print_token (file, VEC_index (cp_token, buffer,
289 VEC_length (cp_token, buffer) - 1));
292 fprintf (file, "\n");
296 /* Dump all tokens in BUFFER to stderr. */
299 cp_lexer_debug_tokens (VEC(cp_token,gc) *buffer)
301 cp_lexer_dump_tokens (stderr, buffer, 0);
306 /* Allocate memory for a new lexer object and return it. */
309 cp_lexer_alloc (void)
313 c_common_no_more_pch ();
315 /* Allocate the memory. */
316 lexer = ggc_alloc_cleared_cp_lexer ();
318 #ifdef ENABLE_CHECKING
319 /* Initially we are not debugging. */
320 lexer->debugging_p = false;
321 #endif /* ENABLE_CHECKING */
322 lexer->saved_tokens = VEC_alloc (cp_token_position, heap,
323 CP_SAVED_TOKEN_STACK);
325 /* Create the buffer. */
326 lexer->buffer = VEC_alloc (cp_token, gc, CP_LEXER_BUFFER_SIZE);
332 /* Create a new main C++ lexer, the lexer that gets tokens from the
336 cp_lexer_new_main (void)
341 /* It's possible that parsing the first pragma will load a PCH file,
342 which is a GC collection point. So we have to do that before
343 allocating any memory. */
344 cp_parser_initial_pragma (&token);
346 lexer = cp_lexer_alloc ();
348 /* Put the first token in the buffer. */
349 VEC_quick_push (cp_token, lexer->buffer, &token);
351 /* Get the remaining tokens from the preprocessor. */
352 while (token.type != CPP_EOF)
354 cp_lexer_get_preprocessor_token (lexer, &token);
355 VEC_safe_push (cp_token, gc, lexer->buffer, &token);
358 lexer->last_token = VEC_address (cp_token, lexer->buffer)
359 + VEC_length (cp_token, lexer->buffer)
361 lexer->next_token = VEC_length (cp_token, lexer->buffer)
362 ? VEC_address (cp_token, lexer->buffer)
365 /* Subsequent preprocessor diagnostics should use compiler
366 diagnostic functions to get the compiler source location. */
369 gcc_assert (!lexer->next_token->purged_p);
373 /* Create a new lexer whose token stream is primed with the tokens in
374 CACHE. When these tokens are exhausted, no new tokens will be read. */
377 cp_lexer_new_from_tokens (cp_token_cache *cache)
379 cp_token *first = cache->first;
380 cp_token *last = cache->last;
381 cp_lexer *lexer = ggc_alloc_cleared_cp_lexer ();
383 /* We do not own the buffer. */
384 lexer->buffer = NULL;
385 lexer->next_token = first == last ? &eof_token : first;
386 lexer->last_token = last;
388 lexer->saved_tokens = VEC_alloc (cp_token_position, heap,
389 CP_SAVED_TOKEN_STACK);
391 #ifdef ENABLE_CHECKING
392 /* Initially we are not debugging. */
393 lexer->debugging_p = false;
396 gcc_assert (!lexer->next_token->purged_p);
400 /* Frees all resources associated with LEXER. */
403 cp_lexer_destroy (cp_lexer *lexer)
405 VEC_free (cp_token, gc, lexer->buffer);
406 VEC_free (cp_token_position, heap, lexer->saved_tokens);
410 /* Returns nonzero if debugging information should be output. */
412 #ifdef ENABLE_CHECKING
415 cp_lexer_debugging_p (cp_lexer *lexer)
417 return lexer->debugging_p;
420 #endif /* ENABLE_CHECKING */
422 static inline cp_token_position
423 cp_lexer_token_position (cp_lexer *lexer, bool previous_p)
425 gcc_assert (!previous_p || lexer->next_token != &eof_token);
427 return lexer->next_token - previous_p;
430 static inline cp_token *
431 cp_lexer_token_at (cp_lexer *lexer ATTRIBUTE_UNUSED, cp_token_position pos)
437 cp_lexer_set_token_position (cp_lexer *lexer, cp_token_position pos)
439 lexer->next_token = cp_lexer_token_at (lexer, pos);
442 static inline cp_token_position
443 cp_lexer_previous_token_position (cp_lexer *lexer)
445 if (lexer->next_token == &eof_token)
446 return lexer->last_token - 1;
448 return cp_lexer_token_position (lexer, true);
451 static inline cp_token *
452 cp_lexer_previous_token (cp_lexer *lexer)
454 cp_token_position tp = cp_lexer_previous_token_position (lexer);
456 return cp_lexer_token_at (lexer, tp);
459 /* nonzero if we are presently saving tokens. */
462 cp_lexer_saving_tokens (const cp_lexer* lexer)
464 return VEC_length (cp_token_position, lexer->saved_tokens) != 0;
467 /* Store the next token from the preprocessor in *TOKEN. Return true
468 if we reach EOF. If LEXER is NULL, assume we are handling an
469 initial #pragma pch_preprocess, and thus want the lexer to return
470 processed strings. */
473 cp_lexer_get_preprocessor_token (cp_lexer *lexer, cp_token *token)
475 static int is_extern_c = 0;
477 /* Get a new token from the preprocessor. */
479 = c_lex_with_flags (&token->u.value, &token->location, &token->flags,
480 lexer == NULL ? 0 : C_LEX_STRING_NO_JOIN);
481 token->keyword = RID_MAX;
482 token->pragma_kind = PRAGMA_NONE;
483 token->purged_p = false;
485 /* On some systems, some header files are surrounded by an
486 implicit extern "C" block. Set a flag in the token if it
487 comes from such a header. */
488 is_extern_c += pending_lang_change;
489 pending_lang_change = 0;
490 token->implicit_extern_c = is_extern_c > 0;
492 /* Check to see if this token is a keyword. */
493 if (token->type == CPP_NAME)
495 if (C_IS_RESERVED_WORD (token->u.value))
497 /* Mark this token as a keyword. */
498 token->type = CPP_KEYWORD;
499 /* Record which keyword. */
500 token->keyword = C_RID_CODE (token->u.value);
504 if (warn_cxx0x_compat
505 && C_RID_CODE (token->u.value) >= RID_FIRST_CXX0X
506 && C_RID_CODE (token->u.value) <= RID_LAST_CXX0X)
508 /* Warn about the C++0x keyword (but still treat it as
510 warning (OPT_Wc__0x_compat,
511 "identifier %qE will become a keyword in C++0x",
514 /* Clear out the C_RID_CODE so we don't warn about this
515 particular identifier-turned-keyword again. */
516 C_SET_RID_CODE (token->u.value, RID_MAX);
519 token->ambiguous_p = false;
520 token->keyword = RID_MAX;
523 else if (token->type == CPP_AT_NAME)
525 /* This only happens in Objective-C++; it must be a keyword. */
526 token->type = CPP_KEYWORD;
527 switch (C_RID_CODE (token->u.value))
529 /* Replace 'class' with '@class', 'private' with '@private',
530 etc. This prevents confusion with the C++ keyword
531 'class', and makes the tokens consistent with other
532 Objective-C 'AT' keywords. For example '@class' is
533 reported as RID_AT_CLASS which is consistent with
534 '@synchronized', which is reported as
537 case RID_CLASS: token->keyword = RID_AT_CLASS; break;
538 case RID_PRIVATE: token->keyword = RID_AT_PRIVATE; break;
539 case RID_PROTECTED: token->keyword = RID_AT_PROTECTED; break;
540 case RID_PUBLIC: token->keyword = RID_AT_PUBLIC; break;
541 case RID_THROW: token->keyword = RID_AT_THROW; break;
542 case RID_TRY: token->keyword = RID_AT_TRY; break;
543 case RID_CATCH: token->keyword = RID_AT_CATCH; break;
544 default: token->keyword = C_RID_CODE (token->u.value);
547 else if (token->type == CPP_PRAGMA)
549 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
550 token->pragma_kind = ((enum pragma_kind)
551 TREE_INT_CST_LOW (token->u.value));
552 token->u.value = NULL_TREE;
556 /* Update the globals input_location and the input file stack from TOKEN. */
558 cp_lexer_set_source_position_from_token (cp_token *token)
560 if (token->type != CPP_EOF)
562 input_location = token->location;
566 /* Return a pointer to the next token in the token stream, but do not
569 static inline cp_token *
570 cp_lexer_peek_token (cp_lexer *lexer)
572 if (cp_lexer_debugging_p (lexer))
574 fputs ("cp_lexer: peeking at token: ", cp_lexer_debug_stream);
575 cp_lexer_print_token (cp_lexer_debug_stream, lexer->next_token);
576 putc ('\n', cp_lexer_debug_stream);
578 return lexer->next_token;
581 /* Return true if the next token has the indicated TYPE. */
584 cp_lexer_next_token_is (cp_lexer* lexer, enum cpp_ttype type)
586 return cp_lexer_peek_token (lexer)->type == type;
589 /* Return true if the next token does not have the indicated TYPE. */
592 cp_lexer_next_token_is_not (cp_lexer* lexer, enum cpp_ttype type)
594 return !cp_lexer_next_token_is (lexer, type);
597 /* Return true if the next token is the indicated KEYWORD. */
600 cp_lexer_next_token_is_keyword (cp_lexer* lexer, enum rid keyword)
602 return cp_lexer_peek_token (lexer)->keyword == keyword;
605 /* Return true if the next token is not the indicated KEYWORD. */
608 cp_lexer_next_token_is_not_keyword (cp_lexer* lexer, enum rid keyword)
610 return cp_lexer_peek_token (lexer)->keyword != keyword;
613 /* Return true if the next token is a keyword for a decl-specifier. */
616 cp_lexer_next_token_is_decl_specifier_keyword (cp_lexer *lexer)
620 token = cp_lexer_peek_token (lexer);
621 switch (token->keyword)
623 /* auto specifier: storage-class-specifier in C++,
624 simple-type-specifier in C++0x. */
626 /* Storage classes. */
632 /* Elaborated type specifiers. */
638 /* Simple type specifiers. */
653 /* GNU extensions. */
656 /* C++0x extensions. */
658 case RID_UNDERLYING_TYPE:
666 /* Return a pointer to the Nth token in the token stream. If N is 1,
667 then this is precisely equivalent to cp_lexer_peek_token (except
668 that it is not inline). One would like to disallow that case, but
669 there is one case (cp_parser_nth_token_starts_template_id) where
670 the caller passes a variable for N and it might be 1. */
673 cp_lexer_peek_nth_token (cp_lexer* lexer, size_t n)
677 /* N is 1-based, not zero-based. */
680 if (cp_lexer_debugging_p (lexer))
681 fprintf (cp_lexer_debug_stream,
682 "cp_lexer: peeking ahead %ld at token: ", (long)n);
685 token = lexer->next_token;
686 gcc_assert (!n || token != &eof_token);
690 if (token == lexer->last_token)
696 if (!token->purged_p)
700 if (cp_lexer_debugging_p (lexer))
702 cp_lexer_print_token (cp_lexer_debug_stream, token);
703 putc ('\n', cp_lexer_debug_stream);
709 /* Return the next token, and advance the lexer's next_token pointer
710 to point to the next non-purged token. */
713 cp_lexer_consume_token (cp_lexer* lexer)
715 cp_token *token = lexer->next_token;
717 gcc_assert (token != &eof_token);
718 gcc_assert (!lexer->in_pragma || token->type != CPP_PRAGMA_EOL);
723 if (lexer->next_token == lexer->last_token)
725 lexer->next_token = &eof_token;
730 while (lexer->next_token->purged_p);
732 cp_lexer_set_source_position_from_token (token);
734 /* Provide debugging output. */
735 if (cp_lexer_debugging_p (lexer))
737 fputs ("cp_lexer: consuming token: ", cp_lexer_debug_stream);
738 cp_lexer_print_token (cp_lexer_debug_stream, token);
739 putc ('\n', cp_lexer_debug_stream);
745 /* Permanently remove the next token from the token stream, and
746 advance the next_token pointer to refer to the next non-purged
750 cp_lexer_purge_token (cp_lexer *lexer)
752 cp_token *tok = lexer->next_token;
754 gcc_assert (tok != &eof_token);
755 tok->purged_p = true;
756 tok->location = UNKNOWN_LOCATION;
757 tok->u.value = NULL_TREE;
758 tok->keyword = RID_MAX;
763 if (tok == lexer->last_token)
769 while (tok->purged_p);
770 lexer->next_token = tok;
773 /* Permanently remove all tokens after TOK, up to, but not
774 including, the token that will be returned next by
775 cp_lexer_peek_token. */
778 cp_lexer_purge_tokens_after (cp_lexer *lexer, cp_token *tok)
780 cp_token *peek = lexer->next_token;
782 if (peek == &eof_token)
783 peek = lexer->last_token;
785 gcc_assert (tok < peek);
787 for ( tok += 1; tok != peek; tok += 1)
789 tok->purged_p = true;
790 tok->location = UNKNOWN_LOCATION;
791 tok->u.value = NULL_TREE;
792 tok->keyword = RID_MAX;
796 /* Begin saving tokens. All tokens consumed after this point will be
800 cp_lexer_save_tokens (cp_lexer* lexer)
802 /* Provide debugging output. */
803 if (cp_lexer_debugging_p (lexer))
804 fprintf (cp_lexer_debug_stream, "cp_lexer: saving tokens\n");
806 VEC_safe_push (cp_token_position, heap,
807 lexer->saved_tokens, lexer->next_token);
810 /* Commit to the portion of the token stream most recently saved. */
813 cp_lexer_commit_tokens (cp_lexer* lexer)
815 /* Provide debugging output. */
816 if (cp_lexer_debugging_p (lexer))
817 fprintf (cp_lexer_debug_stream, "cp_lexer: committing tokens\n");
819 VEC_pop (cp_token_position, lexer->saved_tokens);
822 /* Return all tokens saved since the last call to cp_lexer_save_tokens
823 to the token stream. Stop saving tokens. */
826 cp_lexer_rollback_tokens (cp_lexer* lexer)
828 /* Provide debugging output. */
829 if (cp_lexer_debugging_p (lexer))
830 fprintf (cp_lexer_debug_stream, "cp_lexer: restoring tokens\n");
832 lexer->next_token = VEC_pop (cp_token_position, lexer->saved_tokens);
835 /* Print a representation of the TOKEN on the STREAM. */
837 #ifdef ENABLE_CHECKING
840 cp_lexer_print_token (FILE * stream, cp_token *token)
842 /* We don't use cpp_type2name here because the parser defines
843 a few tokens of its own. */
844 static const char *const token_names[] = {
845 /* cpplib-defined token types */
851 /* C++ parser token types - see "Manifest constants", above. */
854 "NESTED_NAME_SPECIFIER",
857 /* For some tokens, print the associated data. */
861 /* Some keywords have a value that is not an IDENTIFIER_NODE.
862 For example, `struct' is mapped to an INTEGER_CST. */
863 if (TREE_CODE (token->u.value) != IDENTIFIER_NODE)
865 /* else fall through */
867 fputs (IDENTIFIER_POINTER (token->u.value), stream);
875 fprintf (stream, " \"%s\"", TREE_STRING_POINTER (token->u.value));
879 print_generic_expr (stream, token->u.value, 0);
883 /* If we have a name for the token, print it out. Otherwise, we
884 simply give the numeric code. */
885 if (token->type < ARRAY_SIZE(token_names))
886 fputs (token_names[token->type], stream);
888 fprintf (stream, "[%d]", token->type);
893 /* Start emitting debugging information. */
896 cp_lexer_start_debugging (cp_lexer* lexer)
898 lexer->debugging_p = true;
901 /* Stop emitting debugging information. */
904 cp_lexer_stop_debugging (cp_lexer* lexer)
906 lexer->debugging_p = false;
909 #endif /* ENABLE_CHECKING */
911 /* Create a new cp_token_cache, representing a range of tokens. */
913 static cp_token_cache *
914 cp_token_cache_new (cp_token *first, cp_token *last)
916 cp_token_cache *cache = ggc_alloc_cp_token_cache ();
917 cache->first = first;
923 /* Decl-specifiers. */
925 /* Set *DECL_SPECS to represent an empty decl-specifier-seq. */
928 clear_decl_specs (cp_decl_specifier_seq *decl_specs)
930 memset (decl_specs, 0, sizeof (cp_decl_specifier_seq));
935 /* Nothing other than the parser should be creating declarators;
936 declarators are a semi-syntactic representation of C++ entities.
937 Other parts of the front end that need to create entities (like
938 VAR_DECLs or FUNCTION_DECLs) should do that directly. */
940 static cp_declarator *make_call_declarator
941 (cp_declarator *, tree, cp_cv_quals, cp_virt_specifiers, tree, tree);
942 static cp_declarator *make_array_declarator
943 (cp_declarator *, tree);
944 static cp_declarator *make_pointer_declarator
945 (cp_cv_quals, cp_declarator *);
946 static cp_declarator *make_reference_declarator
947 (cp_cv_quals, cp_declarator *, bool);
948 static cp_parameter_declarator *make_parameter_declarator
949 (cp_decl_specifier_seq *, cp_declarator *, tree);
950 static cp_declarator *make_ptrmem_declarator
951 (cp_cv_quals, tree, cp_declarator *);
953 /* An erroneous declarator. */
954 static cp_declarator *cp_error_declarator;
956 /* The obstack on which declarators and related data structures are
958 static struct obstack declarator_obstack;
960 /* Alloc BYTES from the declarator memory pool. */
963 alloc_declarator (size_t bytes)
965 return obstack_alloc (&declarator_obstack, bytes);
968 /* Allocate a declarator of the indicated KIND. Clear fields that are
969 common to all declarators. */
971 static cp_declarator *
972 make_declarator (cp_declarator_kind kind)
974 cp_declarator *declarator;
976 declarator = (cp_declarator *) alloc_declarator (sizeof (cp_declarator));
977 declarator->kind = kind;
978 declarator->attributes = NULL_TREE;
979 declarator->declarator = NULL;
980 declarator->parameter_pack_p = false;
981 declarator->id_loc = UNKNOWN_LOCATION;
986 /* Make a declarator for a generalized identifier. If
987 QUALIFYING_SCOPE is non-NULL, the identifier is
988 QUALIFYING_SCOPE::UNQUALIFIED_NAME; otherwise, it is just
989 UNQUALIFIED_NAME. SFK indicates the kind of special function this
992 static cp_declarator *
993 make_id_declarator (tree qualifying_scope, tree unqualified_name,
994 special_function_kind sfk)
996 cp_declarator *declarator;
998 /* It is valid to write:
1000 class C { void f(); };
1004 The standard is not clear about whether `typedef const C D' is
1005 legal; as of 2002-09-15 the committee is considering that
1006 question. EDG 3.0 allows that syntax. Therefore, we do as
1008 if (qualifying_scope && TYPE_P (qualifying_scope))
1009 qualifying_scope = TYPE_MAIN_VARIANT (qualifying_scope);
1011 gcc_assert (TREE_CODE (unqualified_name) == IDENTIFIER_NODE
1012 || TREE_CODE (unqualified_name) == BIT_NOT_EXPR
1013 || TREE_CODE (unqualified_name) == TEMPLATE_ID_EXPR);
1015 declarator = make_declarator (cdk_id);
1016 declarator->u.id.qualifying_scope = qualifying_scope;
1017 declarator->u.id.unqualified_name = unqualified_name;
1018 declarator->u.id.sfk = sfk;
1023 /* Make a declarator for a pointer to TARGET. CV_QUALIFIERS is a list
1024 of modifiers such as const or volatile to apply to the pointer
1025 type, represented as identifiers. */
1028 make_pointer_declarator (cp_cv_quals cv_qualifiers, cp_declarator *target)
1030 cp_declarator *declarator;
1032 declarator = make_declarator (cdk_pointer);
1033 declarator->declarator = target;
1034 declarator->u.pointer.qualifiers = cv_qualifiers;
1035 declarator->u.pointer.class_type = NULL_TREE;
1038 declarator->id_loc = target->id_loc;
1039 declarator->parameter_pack_p = target->parameter_pack_p;
1040 target->parameter_pack_p = false;
1043 declarator->parameter_pack_p = false;
1048 /* Like make_pointer_declarator -- but for references. */
1051 make_reference_declarator (cp_cv_quals cv_qualifiers, cp_declarator *target,
1054 cp_declarator *declarator;
1056 declarator = make_declarator (cdk_reference);
1057 declarator->declarator = target;
1058 declarator->u.reference.qualifiers = cv_qualifiers;
1059 declarator->u.reference.rvalue_ref = rvalue_ref;
1062 declarator->id_loc = target->id_loc;
1063 declarator->parameter_pack_p = target->parameter_pack_p;
1064 target->parameter_pack_p = false;
1067 declarator->parameter_pack_p = false;
1072 /* Like make_pointer_declarator -- but for a pointer to a non-static
1073 member of CLASS_TYPE. */
1076 make_ptrmem_declarator (cp_cv_quals cv_qualifiers, tree class_type,
1077 cp_declarator *pointee)
1079 cp_declarator *declarator;
1081 declarator = make_declarator (cdk_ptrmem);
1082 declarator->declarator = pointee;
1083 declarator->u.pointer.qualifiers = cv_qualifiers;
1084 declarator->u.pointer.class_type = class_type;
1088 declarator->parameter_pack_p = pointee->parameter_pack_p;
1089 pointee->parameter_pack_p = false;
1092 declarator->parameter_pack_p = false;
1097 /* Make a declarator for the function given by TARGET, with the
1098 indicated PARMS. The CV_QUALIFIERS aply to the function, as in
1099 "const"-qualified member function. The EXCEPTION_SPECIFICATION
1100 indicates what exceptions can be thrown. */
1103 make_call_declarator (cp_declarator *target,
1105 cp_cv_quals cv_qualifiers,
1106 cp_virt_specifiers virt_specifiers,
1107 tree exception_specification,
1108 tree late_return_type)
1110 cp_declarator *declarator;
1112 declarator = make_declarator (cdk_function);
1113 declarator->declarator = target;
1114 declarator->u.function.parameters = parms;
1115 declarator->u.function.qualifiers = cv_qualifiers;
1116 declarator->u.function.virt_specifiers = virt_specifiers;
1117 declarator->u.function.exception_specification = exception_specification;
1118 declarator->u.function.late_return_type = late_return_type;
1121 declarator->id_loc = target->id_loc;
1122 declarator->parameter_pack_p = target->parameter_pack_p;
1123 target->parameter_pack_p = false;
1126 declarator->parameter_pack_p = false;
1131 /* Make a declarator for an array of BOUNDS elements, each of which is
1132 defined by ELEMENT. */
1135 make_array_declarator (cp_declarator *element, tree bounds)
1137 cp_declarator *declarator;
1139 declarator = make_declarator (cdk_array);
1140 declarator->declarator = element;
1141 declarator->u.array.bounds = bounds;
1144 declarator->id_loc = element->id_loc;
1145 declarator->parameter_pack_p = element->parameter_pack_p;
1146 element->parameter_pack_p = false;
1149 declarator->parameter_pack_p = false;
1154 /* Determine whether the declarator we've seen so far can be a
1155 parameter pack, when followed by an ellipsis. */
1157 declarator_can_be_parameter_pack (cp_declarator *declarator)
1159 /* Search for a declarator name, or any other declarator that goes
1160 after the point where the ellipsis could appear in a parameter
1161 pack. If we find any of these, then this declarator can not be
1162 made into a parameter pack. */
1164 while (declarator && !found)
1166 switch ((int)declarator->kind)
1177 declarator = declarator->declarator;
1185 cp_parameter_declarator *no_parameters;
1187 /* Create a parameter declarator with the indicated DECL_SPECIFIERS,
1188 DECLARATOR and DEFAULT_ARGUMENT. */
1190 cp_parameter_declarator *
1191 make_parameter_declarator (cp_decl_specifier_seq *decl_specifiers,
1192 cp_declarator *declarator,
1193 tree default_argument)
1195 cp_parameter_declarator *parameter;
1197 parameter = ((cp_parameter_declarator *)
1198 alloc_declarator (sizeof (cp_parameter_declarator)));
1199 parameter->next = NULL;
1200 if (decl_specifiers)
1201 parameter->decl_specifiers = *decl_specifiers;
1203 clear_decl_specs (¶meter->decl_specifiers);
1204 parameter->declarator = declarator;
1205 parameter->default_argument = default_argument;
1206 parameter->ellipsis_p = false;
1211 /* Returns true iff DECLARATOR is a declaration for a function. */
1214 function_declarator_p (const cp_declarator *declarator)
1218 if (declarator->kind == cdk_function
1219 && declarator->declarator->kind == cdk_id)
1221 if (declarator->kind == cdk_id
1222 || declarator->kind == cdk_error)
1224 declarator = declarator->declarator;
1234 A cp_parser parses the token stream as specified by the C++
1235 grammar. Its job is purely parsing, not semantic analysis. For
1236 example, the parser breaks the token stream into declarators,
1237 expressions, statements, and other similar syntactic constructs.
1238 It does not check that the types of the expressions on either side
1239 of an assignment-statement are compatible, or that a function is
1240 not declared with a parameter of type `void'.
1242 The parser invokes routines elsewhere in the compiler to perform
1243 semantic analysis and to build up the abstract syntax tree for the
1246 The parser (and the template instantiation code, which is, in a
1247 way, a close relative of parsing) are the only parts of the
1248 compiler that should be calling push_scope and pop_scope, or
1249 related functions. The parser (and template instantiation code)
1250 keeps track of what scope is presently active; everything else
1251 should simply honor that. (The code that generates static
1252 initializers may also need to set the scope, in order to check
1253 access control correctly when emitting the initializers.)
1258 The parser is of the standard recursive-descent variety. Upcoming
1259 tokens in the token stream are examined in order to determine which
1260 production to use when parsing a non-terminal. Some C++ constructs
1261 require arbitrary look ahead to disambiguate. For example, it is
1262 impossible, in the general case, to tell whether a statement is an
1263 expression or declaration without scanning the entire statement.
1264 Therefore, the parser is capable of "parsing tentatively." When the
1265 parser is not sure what construct comes next, it enters this mode.
1266 Then, while we attempt to parse the construct, the parser queues up
1267 error messages, rather than issuing them immediately, and saves the
1268 tokens it consumes. If the construct is parsed successfully, the
1269 parser "commits", i.e., it issues any queued error messages and
1270 the tokens that were being preserved are permanently discarded.
1271 If, however, the construct is not parsed successfully, the parser
1272 rolls back its state completely so that it can resume parsing using
1273 a different alternative.
1278 The performance of the parser could probably be improved substantially.
1279 We could often eliminate the need to parse tentatively by looking ahead
1280 a little bit. In some places, this approach might not entirely eliminate
1281 the need to parse tentatively, but it might still speed up the average
1284 /* Flags that are passed to some parsing functions. These values can
1285 be bitwise-ored together. */
1290 CP_PARSER_FLAGS_NONE = 0x0,
1291 /* The construct is optional. If it is not present, then no error
1292 should be issued. */
1293 CP_PARSER_FLAGS_OPTIONAL = 0x1,
1294 /* When parsing a type-specifier, treat user-defined type-names
1295 as non-type identifiers. */
1296 CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES = 0x2,
1297 /* When parsing a type-specifier, do not try to parse a class-specifier
1298 or enum-specifier. */
1299 CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS = 0x4,
1300 /* When parsing a decl-specifier-seq, only allow type-specifier or
1302 CP_PARSER_FLAGS_ONLY_TYPE_OR_CONSTEXPR = 0x8
1305 /* This type is used for parameters and variables which hold
1306 combinations of the above flags. */
1307 typedef int cp_parser_flags;
1309 /* The different kinds of declarators we want to parse. */
1311 typedef enum cp_parser_declarator_kind
1313 /* We want an abstract declarator. */
1314 CP_PARSER_DECLARATOR_ABSTRACT,
1315 /* We want a named declarator. */
1316 CP_PARSER_DECLARATOR_NAMED,
1317 /* We don't mind, but the name must be an unqualified-id. */
1318 CP_PARSER_DECLARATOR_EITHER
1319 } cp_parser_declarator_kind;
1321 /* The precedence values used to parse binary expressions. The minimum value
1322 of PREC must be 1, because zero is reserved to quickly discriminate
1323 binary operators from other tokens. */
1328 PREC_LOGICAL_OR_EXPRESSION,
1329 PREC_LOGICAL_AND_EXPRESSION,
1330 PREC_INCLUSIVE_OR_EXPRESSION,
1331 PREC_EXCLUSIVE_OR_EXPRESSION,
1332 PREC_AND_EXPRESSION,
1333 PREC_EQUALITY_EXPRESSION,
1334 PREC_RELATIONAL_EXPRESSION,
1335 PREC_SHIFT_EXPRESSION,
1336 PREC_ADDITIVE_EXPRESSION,
1337 PREC_MULTIPLICATIVE_EXPRESSION,
1339 NUM_PREC_VALUES = PREC_PM_EXPRESSION
1342 /* A mapping from a token type to a corresponding tree node type, with a
1343 precedence value. */
1345 typedef struct cp_parser_binary_operations_map_node
1347 /* The token type. */
1348 enum cpp_ttype token_type;
1349 /* The corresponding tree code. */
1350 enum tree_code tree_type;
1351 /* The precedence of this operator. */
1352 enum cp_parser_prec prec;
1353 } cp_parser_binary_operations_map_node;
1355 typedef struct cp_parser_expression_stack_entry
1357 /* Left hand side of the binary operation we are currently
1360 /* Original tree code for left hand side, if it was a binary
1361 expression itself (used for -Wparentheses). */
1362 enum tree_code lhs_type;
1363 /* Tree code for the binary operation we are parsing. */
1364 enum tree_code tree_type;
1365 /* Precedence of the binary operation we are parsing. */
1366 enum cp_parser_prec prec;
1367 } cp_parser_expression_stack_entry;
1369 /* The stack for storing partial expressions. We only need NUM_PREC_VALUES
1370 entries because precedence levels on the stack are monotonically
1372 typedef struct cp_parser_expression_stack_entry
1373 cp_parser_expression_stack[NUM_PREC_VALUES];
1377 /* Constructors and destructors. */
1379 static cp_parser_context *cp_parser_context_new
1380 (cp_parser_context *);
1382 /* Class variables. */
1384 static GTY((deletable)) cp_parser_context* cp_parser_context_free_list;
1386 /* The operator-precedence table used by cp_parser_binary_expression.
1387 Transformed into an associative array (binops_by_token) by
1390 static const cp_parser_binary_operations_map_node binops[] = {
1391 { CPP_DEREF_STAR, MEMBER_REF, PREC_PM_EXPRESSION },
1392 { CPP_DOT_STAR, DOTSTAR_EXPR, PREC_PM_EXPRESSION },
1394 { CPP_MULT, MULT_EXPR, PREC_MULTIPLICATIVE_EXPRESSION },
1395 { CPP_DIV, TRUNC_DIV_EXPR, PREC_MULTIPLICATIVE_EXPRESSION },
1396 { CPP_MOD, TRUNC_MOD_EXPR, PREC_MULTIPLICATIVE_EXPRESSION },
1398 { CPP_PLUS, PLUS_EXPR, PREC_ADDITIVE_EXPRESSION },
1399 { CPP_MINUS, MINUS_EXPR, PREC_ADDITIVE_EXPRESSION },
1401 { CPP_LSHIFT, LSHIFT_EXPR, PREC_SHIFT_EXPRESSION },
1402 { CPP_RSHIFT, RSHIFT_EXPR, PREC_SHIFT_EXPRESSION },
1404 { CPP_LESS, LT_EXPR, PREC_RELATIONAL_EXPRESSION },
1405 { CPP_GREATER, GT_EXPR, PREC_RELATIONAL_EXPRESSION },
1406 { CPP_LESS_EQ, LE_EXPR, PREC_RELATIONAL_EXPRESSION },
1407 { CPP_GREATER_EQ, GE_EXPR, PREC_RELATIONAL_EXPRESSION },
1409 { CPP_EQ_EQ, EQ_EXPR, PREC_EQUALITY_EXPRESSION },
1410 { CPP_NOT_EQ, NE_EXPR, PREC_EQUALITY_EXPRESSION },
1412 { CPP_AND, BIT_AND_EXPR, PREC_AND_EXPRESSION },
1414 { CPP_XOR, BIT_XOR_EXPR, PREC_EXCLUSIVE_OR_EXPRESSION },
1416 { CPP_OR, BIT_IOR_EXPR, PREC_INCLUSIVE_OR_EXPRESSION },
1418 { CPP_AND_AND, TRUTH_ANDIF_EXPR, PREC_LOGICAL_AND_EXPRESSION },
1420 { CPP_OR_OR, TRUTH_ORIF_EXPR, PREC_LOGICAL_OR_EXPRESSION }
1423 /* The same as binops, but initialized by cp_parser_new so that
1424 binops_by_token[N].token_type == N. Used in cp_parser_binary_expression
1426 static cp_parser_binary_operations_map_node binops_by_token[N_CP_TTYPES];
1428 /* Constructors and destructors. */
1430 /* Construct a new context. The context below this one on the stack
1431 is given by NEXT. */
1433 static cp_parser_context *
1434 cp_parser_context_new (cp_parser_context* next)
1436 cp_parser_context *context;
1438 /* Allocate the storage. */
1439 if (cp_parser_context_free_list != NULL)
1441 /* Pull the first entry from the free list. */
1442 context = cp_parser_context_free_list;
1443 cp_parser_context_free_list = context->next;
1444 memset (context, 0, sizeof (*context));
1447 context = ggc_alloc_cleared_cp_parser_context ();
1449 /* No errors have occurred yet in this context. */
1450 context->status = CP_PARSER_STATUS_KIND_NO_ERROR;
1451 /* If this is not the bottommost context, copy information that we
1452 need from the previous context. */
1455 /* If, in the NEXT context, we are parsing an `x->' or `x.'
1456 expression, then we are parsing one in this context, too. */
1457 context->object_type = next->object_type;
1458 /* Thread the stack. */
1459 context->next = next;
1465 /* Managing the unparsed function queues. */
1467 #define unparsed_funs_with_default_args \
1468 VEC_last (cp_unparsed_functions_entry, parser->unparsed_queues)->funs_with_default_args
1469 #define unparsed_funs_with_definitions \
1470 VEC_last (cp_unparsed_functions_entry, parser->unparsed_queues)->funs_with_definitions
1473 push_unparsed_function_queues (cp_parser *parser)
1475 VEC_safe_push (cp_unparsed_functions_entry, gc,
1476 parser->unparsed_queues, NULL);
1477 unparsed_funs_with_default_args = NULL;
1478 unparsed_funs_with_definitions = make_tree_vector ();
1482 pop_unparsed_function_queues (cp_parser *parser)
1484 release_tree_vector (unparsed_funs_with_definitions);
1485 VEC_pop (cp_unparsed_functions_entry, parser->unparsed_queues);
1490 /* Constructors and destructors. */
1492 static cp_parser *cp_parser_new
1495 /* Routines to parse various constructs.
1497 Those that return `tree' will return the error_mark_node (rather
1498 than NULL_TREE) if a parse error occurs, unless otherwise noted.
1499 Sometimes, they will return an ordinary node if error-recovery was
1500 attempted, even though a parse error occurred. So, to check
1501 whether or not a parse error occurred, you should always use
1502 cp_parser_error_occurred. If the construct is optional (indicated
1503 either by an `_opt' in the name of the function that does the
1504 parsing or via a FLAGS parameter), then NULL_TREE is returned if
1505 the construct is not present. */
1507 /* Lexical conventions [gram.lex] */
1509 static tree cp_parser_identifier
1511 static tree cp_parser_string_literal
1512 (cp_parser *, bool, bool);
1514 /* Basic concepts [gram.basic] */
1516 static bool cp_parser_translation_unit
1519 /* Expressions [gram.expr] */
1521 static tree cp_parser_primary_expression
1522 (cp_parser *, bool, bool, bool, cp_id_kind *);
1523 static tree cp_parser_id_expression
1524 (cp_parser *, bool, bool, bool *, bool, bool);
1525 static tree cp_parser_unqualified_id
1526 (cp_parser *, bool, bool, bool, bool);
1527 static tree cp_parser_nested_name_specifier_opt
1528 (cp_parser *, bool, bool, bool, bool);
1529 static tree cp_parser_nested_name_specifier
1530 (cp_parser *, bool, bool, bool, bool);
1531 static tree cp_parser_qualifying_entity
1532 (cp_parser *, bool, bool, bool, bool, bool);
1533 static tree cp_parser_postfix_expression
1534 (cp_parser *, bool, bool, bool, cp_id_kind *);
1535 static tree cp_parser_postfix_open_square_expression
1536 (cp_parser *, tree, bool);
1537 static tree cp_parser_postfix_dot_deref_expression
1538 (cp_parser *, enum cpp_ttype, tree, bool, cp_id_kind *, location_t);
1539 static VEC(tree,gc) *cp_parser_parenthesized_expression_list
1540 (cp_parser *, int, bool, bool, bool *);
1541 /* Values for the second parameter of cp_parser_parenthesized_expression_list. */
1542 enum { non_attr = 0, normal_attr = 1, id_attr = 2 };
1543 static void cp_parser_pseudo_destructor_name
1544 (cp_parser *, tree *, tree *);
1545 static tree cp_parser_unary_expression
1546 (cp_parser *, bool, bool, cp_id_kind *);
1547 static enum tree_code cp_parser_unary_operator
1549 static tree cp_parser_new_expression
1551 static VEC(tree,gc) *cp_parser_new_placement
1553 static tree cp_parser_new_type_id
1554 (cp_parser *, tree *);
1555 static cp_declarator *cp_parser_new_declarator_opt
1557 static cp_declarator *cp_parser_direct_new_declarator
1559 static VEC(tree,gc) *cp_parser_new_initializer
1561 static tree cp_parser_delete_expression
1563 static tree cp_parser_cast_expression
1564 (cp_parser *, bool, bool, cp_id_kind *);
1565 static tree cp_parser_binary_expression
1566 (cp_parser *, bool, bool, enum cp_parser_prec, cp_id_kind *);
1567 static tree cp_parser_question_colon_clause
1568 (cp_parser *, tree);
1569 static tree cp_parser_assignment_expression
1570 (cp_parser *, bool, cp_id_kind *);
1571 static enum tree_code cp_parser_assignment_operator_opt
1573 static tree cp_parser_expression
1574 (cp_parser *, bool, cp_id_kind *);
1575 static tree cp_parser_constant_expression
1576 (cp_parser *, bool, bool *);
1577 static tree cp_parser_builtin_offsetof
1579 static tree cp_parser_lambda_expression
1581 static void cp_parser_lambda_introducer
1582 (cp_parser *, tree);
1583 static bool cp_parser_lambda_declarator_opt
1584 (cp_parser *, tree);
1585 static void cp_parser_lambda_body
1586 (cp_parser *, tree);
1588 /* Statements [gram.stmt.stmt] */
1590 static void cp_parser_statement
1591 (cp_parser *, tree, bool, bool *);
1592 static void cp_parser_label_for_labeled_statement
1594 static tree cp_parser_expression_statement
1595 (cp_parser *, tree);
1596 static tree cp_parser_compound_statement
1597 (cp_parser *, tree, bool, bool);
1598 static void cp_parser_statement_seq_opt
1599 (cp_parser *, tree);
1600 static tree cp_parser_selection_statement
1601 (cp_parser *, bool *);
1602 static tree cp_parser_condition
1604 static tree cp_parser_iteration_statement
1606 static bool cp_parser_for_init_statement
1607 (cp_parser *, tree *decl);
1608 static tree cp_parser_for
1610 static tree cp_parser_c_for
1611 (cp_parser *, tree, tree);
1612 static tree cp_parser_range_for
1613 (cp_parser *, tree, tree, tree);
1614 static tree cp_parser_perform_range_for_lookup
1615 (tree, tree *, tree *);
1616 static tree cp_parser_range_for_member_function
1618 static tree cp_parser_jump_statement
1620 static void cp_parser_declaration_statement
1623 static tree cp_parser_implicitly_scoped_statement
1624 (cp_parser *, bool *);
1625 static void cp_parser_already_scoped_statement
1628 /* Declarations [gram.dcl.dcl] */
1630 static void cp_parser_declaration_seq_opt
1632 static void cp_parser_declaration
1634 static void cp_parser_block_declaration
1635 (cp_parser *, bool);
1636 static void cp_parser_simple_declaration
1637 (cp_parser *, bool, tree *);
1638 static void cp_parser_decl_specifier_seq
1639 (cp_parser *, cp_parser_flags, cp_decl_specifier_seq *, int *);
1640 static tree cp_parser_storage_class_specifier_opt
1642 static tree cp_parser_function_specifier_opt
1643 (cp_parser *, cp_decl_specifier_seq *);
1644 static tree cp_parser_type_specifier
1645 (cp_parser *, cp_parser_flags, cp_decl_specifier_seq *, bool,
1647 static tree cp_parser_simple_type_specifier
1648 (cp_parser *, cp_decl_specifier_seq *, cp_parser_flags);
1649 static tree cp_parser_type_name
1651 static tree cp_parser_nonclass_name
1652 (cp_parser* parser);
1653 static tree cp_parser_elaborated_type_specifier
1654 (cp_parser *, bool, bool);
1655 static tree cp_parser_enum_specifier
1657 static void cp_parser_enumerator_list
1658 (cp_parser *, tree);
1659 static void cp_parser_enumerator_definition
1660 (cp_parser *, tree);
1661 static tree cp_parser_namespace_name
1663 static void cp_parser_namespace_definition
1665 static void cp_parser_namespace_body
1667 static tree cp_parser_qualified_namespace_specifier
1669 static void cp_parser_namespace_alias_definition
1671 static bool cp_parser_using_declaration
1672 (cp_parser *, bool);
1673 static void cp_parser_using_directive
1675 static void cp_parser_asm_definition
1677 static void cp_parser_linkage_specification
1679 static void cp_parser_static_assert
1680 (cp_parser *, bool);
1681 static tree cp_parser_decltype
1684 /* Declarators [gram.dcl.decl] */
1686 static tree cp_parser_init_declarator
1687 (cp_parser *, cp_decl_specifier_seq *, VEC (deferred_access_check,gc)*, bool, bool, int, bool *, tree *);
1688 static cp_declarator *cp_parser_declarator
1689 (cp_parser *, cp_parser_declarator_kind, int *, bool *, bool);
1690 static cp_declarator *cp_parser_direct_declarator
1691 (cp_parser *, cp_parser_declarator_kind, int *, bool);
1692 static enum tree_code cp_parser_ptr_operator
1693 (cp_parser *, tree *, cp_cv_quals *);
1694 static cp_cv_quals cp_parser_cv_qualifier_seq_opt
1696 static cp_virt_specifiers cp_parser_virt_specifier_seq_opt
1698 static tree cp_parser_late_return_type_opt
1700 static tree cp_parser_declarator_id
1701 (cp_parser *, bool);
1702 static tree cp_parser_type_id
1704 static tree cp_parser_template_type_arg
1706 static tree cp_parser_trailing_type_id (cp_parser *);
1707 static tree cp_parser_type_id_1
1708 (cp_parser *, bool, bool);
1709 static void cp_parser_type_specifier_seq
1710 (cp_parser *, bool, bool, cp_decl_specifier_seq *);
1711 static tree cp_parser_parameter_declaration_clause
1713 static tree cp_parser_parameter_declaration_list
1714 (cp_parser *, bool *);
1715 static cp_parameter_declarator *cp_parser_parameter_declaration
1716 (cp_parser *, bool, bool *);
1717 static tree cp_parser_default_argument
1718 (cp_parser *, bool);
1719 static void cp_parser_function_body
1721 static tree cp_parser_initializer
1722 (cp_parser *, bool *, bool *);
1723 static tree cp_parser_initializer_clause
1724 (cp_parser *, bool *);
1725 static tree cp_parser_braced_list
1726 (cp_parser*, bool*);
1727 static VEC(constructor_elt,gc) *cp_parser_initializer_list
1728 (cp_parser *, bool *);
1730 static bool cp_parser_ctor_initializer_opt_and_function_body
1733 /* Classes [gram.class] */
1735 static tree cp_parser_class_name
1736 (cp_parser *, bool, bool, enum tag_types, bool, bool, bool);
1737 static tree cp_parser_class_specifier
1739 static tree cp_parser_class_head
1740 (cp_parser *, bool *, tree *, tree *);
1741 static enum tag_types cp_parser_class_key
1743 static void cp_parser_member_specification_opt
1745 static void cp_parser_member_declaration
1747 static tree cp_parser_pure_specifier
1749 static tree cp_parser_constant_initializer
1752 /* Derived classes [gram.class.derived] */
1754 static tree cp_parser_base_clause
1756 static tree cp_parser_base_specifier
1759 /* Special member functions [gram.special] */
1761 static tree cp_parser_conversion_function_id
1763 static tree cp_parser_conversion_type_id
1765 static cp_declarator *cp_parser_conversion_declarator_opt
1767 static bool cp_parser_ctor_initializer_opt
1769 static void cp_parser_mem_initializer_list
1771 static tree cp_parser_mem_initializer
1773 static tree cp_parser_mem_initializer_id
1776 /* Overloading [gram.over] */
1778 static tree cp_parser_operator_function_id
1780 static tree cp_parser_operator
1783 /* Templates [gram.temp] */
1785 static void cp_parser_template_declaration
1786 (cp_parser *, bool);
1787 static tree cp_parser_template_parameter_list
1789 static tree cp_parser_template_parameter
1790 (cp_parser *, bool *, bool *);
1791 static tree cp_parser_type_parameter
1792 (cp_parser *, bool *);
1793 static tree cp_parser_template_id
1794 (cp_parser *, bool, bool, bool);
1795 static tree cp_parser_template_name
1796 (cp_parser *, bool, bool, bool, bool *);
1797 static tree cp_parser_template_argument_list
1799 static tree cp_parser_template_argument
1801 static void cp_parser_explicit_instantiation
1803 static void cp_parser_explicit_specialization
1806 /* Exception handling [gram.exception] */
1808 static tree cp_parser_try_block
1810 static bool cp_parser_function_try_block
1812 static void cp_parser_handler_seq
1814 static void cp_parser_handler
1816 static tree cp_parser_exception_declaration
1818 static tree cp_parser_throw_expression
1820 static tree cp_parser_exception_specification_opt
1822 static tree cp_parser_type_id_list
1825 /* GNU Extensions */
1827 static tree cp_parser_asm_specification_opt
1829 static tree cp_parser_asm_operand_list
1831 static tree cp_parser_asm_clobber_list
1833 static tree cp_parser_asm_label_list
1835 static tree cp_parser_attributes_opt
1837 static tree cp_parser_attribute_list
1839 static bool cp_parser_extension_opt
1840 (cp_parser *, int *);
1841 static void cp_parser_label_declaration
1844 enum pragma_context { pragma_external, pragma_stmt, pragma_compound };
1845 static bool cp_parser_pragma
1846 (cp_parser *, enum pragma_context);
1848 /* Objective-C++ Productions */
1850 static tree cp_parser_objc_message_receiver
1852 static tree cp_parser_objc_message_args
1854 static tree cp_parser_objc_message_expression
1856 static tree cp_parser_objc_encode_expression
1858 static tree cp_parser_objc_defs_expression
1860 static tree cp_parser_objc_protocol_expression
1862 static tree cp_parser_objc_selector_expression
1864 static tree cp_parser_objc_expression
1866 static bool cp_parser_objc_selector_p
1868 static tree cp_parser_objc_selector
1870 static tree cp_parser_objc_protocol_refs_opt
1872 static void cp_parser_objc_declaration
1873 (cp_parser *, tree);
1874 static tree cp_parser_objc_statement
1876 static bool cp_parser_objc_valid_prefix_attributes
1877 (cp_parser *, tree *);
1878 static void cp_parser_objc_at_property_declaration
1880 static void cp_parser_objc_at_synthesize_declaration
1882 static void cp_parser_objc_at_dynamic_declaration
1884 static tree cp_parser_objc_struct_declaration
1887 /* Utility Routines */
1889 static tree cp_parser_lookup_name
1890 (cp_parser *, tree, enum tag_types, bool, bool, bool, tree *, location_t);
1891 static tree cp_parser_lookup_name_simple
1892 (cp_parser *, tree, location_t);
1893 static tree cp_parser_maybe_treat_template_as_class
1895 static bool cp_parser_check_declarator_template_parameters
1896 (cp_parser *, cp_declarator *, location_t);
1897 static bool cp_parser_check_template_parameters
1898 (cp_parser *, unsigned, location_t, cp_declarator *);
1899 static tree cp_parser_simple_cast_expression
1901 static tree cp_parser_global_scope_opt
1902 (cp_parser *, bool);
1903 static bool cp_parser_constructor_declarator_p
1904 (cp_parser *, bool);
1905 static tree cp_parser_function_definition_from_specifiers_and_declarator
1906 (cp_parser *, cp_decl_specifier_seq *, tree, const cp_declarator *);
1907 static tree cp_parser_function_definition_after_declarator
1908 (cp_parser *, bool);
1909 static void cp_parser_template_declaration_after_export
1910 (cp_parser *, bool);
1911 static void cp_parser_perform_template_parameter_access_checks
1912 (VEC (deferred_access_check,gc)*);
1913 static tree cp_parser_single_declaration
1914 (cp_parser *, VEC (deferred_access_check,gc)*, bool, bool, bool *);
1915 static tree cp_parser_functional_cast
1916 (cp_parser *, tree);
1917 static tree cp_parser_save_member_function_body
1918 (cp_parser *, cp_decl_specifier_seq *, cp_declarator *, tree);
1919 static tree cp_parser_enclosed_template_argument_list
1921 static void cp_parser_save_default_args
1922 (cp_parser *, tree);
1923 static void cp_parser_late_parsing_for_member
1924 (cp_parser *, tree);
1925 static void cp_parser_late_parsing_default_args
1926 (cp_parser *, tree);
1927 static tree cp_parser_sizeof_operand
1928 (cp_parser *, enum rid);
1929 static tree cp_parser_trait_expr
1930 (cp_parser *, enum rid);
1931 static bool cp_parser_declares_only_class_p
1933 static void cp_parser_set_storage_class
1934 (cp_parser *, cp_decl_specifier_seq *, enum rid, location_t);
1935 static void cp_parser_set_decl_spec_type
1936 (cp_decl_specifier_seq *, tree, location_t, bool);
1937 static bool cp_parser_friend_p
1938 (const cp_decl_specifier_seq *);
1939 static void cp_parser_required_error
1940 (cp_parser *, required_token, bool);
1941 static cp_token *cp_parser_require
1942 (cp_parser *, enum cpp_ttype, required_token);
1943 static cp_token *cp_parser_require_keyword
1944 (cp_parser *, enum rid, required_token);
1945 static bool cp_parser_token_starts_function_definition_p
1947 static bool cp_parser_next_token_starts_class_definition_p
1949 static bool cp_parser_next_token_ends_template_argument_p
1951 static bool cp_parser_nth_token_starts_template_argument_list_p
1952 (cp_parser *, size_t);
1953 static enum tag_types cp_parser_token_is_class_key
1955 static void cp_parser_check_class_key
1956 (enum tag_types, tree type);
1957 static void cp_parser_check_access_in_redeclaration
1958 (tree type, location_t location);
1959 static bool cp_parser_optional_template_keyword
1961 static void cp_parser_pre_parsed_nested_name_specifier
1963 static bool cp_parser_cache_group
1964 (cp_parser *, enum cpp_ttype, unsigned);
1965 static void cp_parser_parse_tentatively
1967 static void cp_parser_commit_to_tentative_parse
1969 static void cp_parser_abort_tentative_parse
1971 static bool cp_parser_parse_definitely
1973 static inline bool cp_parser_parsing_tentatively
1975 static bool cp_parser_uncommitted_to_tentative_parse_p
1977 static void cp_parser_error
1978 (cp_parser *, const char *);
1979 static void cp_parser_name_lookup_error
1980 (cp_parser *, tree, tree, name_lookup_error, location_t);
1981 static bool cp_parser_simulate_error
1983 static bool cp_parser_check_type_definition
1985 static void cp_parser_check_for_definition_in_return_type
1986 (cp_declarator *, tree, location_t type_location);
1987 static void cp_parser_check_for_invalid_template_id
1988 (cp_parser *, tree, location_t location);
1989 static bool cp_parser_non_integral_constant_expression
1990 (cp_parser *, non_integral_constant);
1991 static void cp_parser_diagnose_invalid_type_name
1992 (cp_parser *, tree, tree, location_t);
1993 static bool cp_parser_parse_and_diagnose_invalid_type_name
1995 static int cp_parser_skip_to_closing_parenthesis
1996 (cp_parser *, bool, bool, bool);
1997 static void cp_parser_skip_to_end_of_statement
1999 static void cp_parser_consume_semicolon_at_end_of_statement
2001 static void cp_parser_skip_to_end_of_block_or_statement
2003 static bool cp_parser_skip_to_closing_brace
2005 static void cp_parser_skip_to_end_of_template_parameter_list
2007 static void cp_parser_skip_to_pragma_eol
2008 (cp_parser*, cp_token *);
2009 static bool cp_parser_error_occurred
2011 static bool cp_parser_allow_gnu_extensions_p
2013 static bool cp_parser_is_string_literal
2015 static bool cp_parser_is_keyword
2016 (cp_token *, enum rid);
2017 static tree cp_parser_make_typename_type
2018 (cp_parser *, tree, tree, location_t location);
2019 static cp_declarator * cp_parser_make_indirect_declarator
2020 (enum tree_code, tree, cp_cv_quals, cp_declarator *);
2022 /* Returns nonzero if we are parsing tentatively. */
2025 cp_parser_parsing_tentatively (cp_parser* parser)
2027 return parser->context->next != NULL;
2030 /* Returns nonzero if TOKEN is a string literal. */
2033 cp_parser_is_string_literal (cp_token* token)
2035 return (token->type == CPP_STRING ||
2036 token->type == CPP_STRING16 ||
2037 token->type == CPP_STRING32 ||
2038 token->type == CPP_WSTRING ||
2039 token->type == CPP_UTF8STRING);
2042 /* Returns nonzero if TOKEN is the indicated KEYWORD. */
2045 cp_parser_is_keyword (cp_token* token, enum rid keyword)
2047 return token->keyword == keyword;
2050 /* If not parsing tentatively, issue a diagnostic of the form
2051 FILE:LINE: MESSAGE before TOKEN
2052 where TOKEN is the next token in the input stream. MESSAGE
2053 (specified by the caller) is usually of the form "expected
2057 cp_parser_error (cp_parser* parser, const char* gmsgid)
2059 if (!cp_parser_simulate_error (parser))
2061 cp_token *token = cp_lexer_peek_token (parser->lexer);
2062 /* This diagnostic makes more sense if it is tagged to the line
2063 of the token we just peeked at. */
2064 cp_lexer_set_source_position_from_token (token);
2066 if (token->type == CPP_PRAGMA)
2068 error_at (token->location,
2069 "%<#pragma%> is not allowed here");
2070 cp_parser_skip_to_pragma_eol (parser, token);
2074 c_parse_error (gmsgid,
2075 /* Because c_parser_error does not understand
2076 CPP_KEYWORD, keywords are treated like
2078 (token->type == CPP_KEYWORD ? CPP_NAME : token->type),
2079 token->u.value, token->flags);
2083 /* Issue an error about name-lookup failing. NAME is the
2084 IDENTIFIER_NODE DECL is the result of
2085 the lookup (as returned from cp_parser_lookup_name). DESIRED is
2086 the thing that we hoped to find. */
2089 cp_parser_name_lookup_error (cp_parser* parser,
2092 name_lookup_error desired,
2093 location_t location)
2095 /* If name lookup completely failed, tell the user that NAME was not
2097 if (decl == error_mark_node)
2099 if (parser->scope && parser->scope != global_namespace)
2100 error_at (location, "%<%E::%E%> has not been declared",
2101 parser->scope, name);
2102 else if (parser->scope == global_namespace)
2103 error_at (location, "%<::%E%> has not been declared", name);
2104 else if (parser->object_scope
2105 && !CLASS_TYPE_P (parser->object_scope))
2106 error_at (location, "request for member %qE in non-class type %qT",
2107 name, parser->object_scope);
2108 else if (parser->object_scope)
2109 error_at (location, "%<%T::%E%> has not been declared",
2110 parser->object_scope, name);
2112 error_at (location, "%qE has not been declared", name);
2114 else if (parser->scope && parser->scope != global_namespace)
2119 error_at (location, "%<%E::%E%> is not a type",
2120 parser->scope, name);
2123 error_at (location, "%<%E::%E%> is not a class or namespace",
2124 parser->scope, name);
2128 "%<%E::%E%> is not a class, namespace, or enumeration",
2129 parser->scope, name);
2136 else if (parser->scope == global_namespace)
2141 error_at (location, "%<::%E%> is not a type", name);
2144 error_at (location, "%<::%E%> is not a class or namespace", name);
2148 "%<::%E%> is not a class, namespace, or enumeration",
2160 error_at (location, "%qE is not a type", name);
2163 error_at (location, "%qE is not a class or namespace", name);
2167 "%qE is not a class, namespace, or enumeration", name);
2175 /* If we are parsing tentatively, remember that an error has occurred
2176 during this tentative parse. Returns true if the error was
2177 simulated; false if a message should be issued by the caller. */
2180 cp_parser_simulate_error (cp_parser* parser)
2182 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
2184 parser->context->status = CP_PARSER_STATUS_KIND_ERROR;
2190 /* Check for repeated decl-specifiers. */
2193 cp_parser_check_decl_spec (cp_decl_specifier_seq *decl_specs,
2194 location_t location)
2198 for (ds = ds_first; ds != ds_last; ++ds)
2200 unsigned count = decl_specs->specs[ds];
2203 /* The "long" specifier is a special case because of "long long". */
2207 error_at (location, "%<long long long%> is too long for GCC");
2209 pedwarn_cxx98 (location, OPT_Wlong_long,
2210 "ISO C++ 1998 does not support %<long long%>");
2214 static const char *const decl_spec_names[] = {
2231 error_at (location, "duplicate %qs", decl_spec_names[ds]);
2236 /* This function is called when a type is defined. If type
2237 definitions are forbidden at this point, an error message is
2241 cp_parser_check_type_definition (cp_parser* parser)
2243 /* If types are forbidden here, issue a message. */
2244 if (parser->type_definition_forbidden_message)
2246 /* Don't use `%s' to print the string, because quotations (`%<', `%>')
2247 in the message need to be interpreted. */
2248 error (parser->type_definition_forbidden_message);
2254 /* This function is called when the DECLARATOR is processed. The TYPE
2255 was a type defined in the decl-specifiers. If it is invalid to
2256 define a type in the decl-specifiers for DECLARATOR, an error is
2257 issued. TYPE_LOCATION is the location of TYPE and is used
2258 for error reporting. */
2261 cp_parser_check_for_definition_in_return_type (cp_declarator *declarator,
2262 tree type, location_t type_location)
2264 /* [dcl.fct] forbids type definitions in return types.
2265 Unfortunately, it's not easy to know whether or not we are
2266 processing a return type until after the fact. */
2268 && (declarator->kind == cdk_pointer
2269 || declarator->kind == cdk_reference
2270 || declarator->kind == cdk_ptrmem))
2271 declarator = declarator->declarator;
2273 && declarator->kind == cdk_function)
2275 error_at (type_location,
2276 "new types may not be defined in a return type");
2277 inform (type_location,
2278 "(perhaps a semicolon is missing after the definition of %qT)",
2283 /* A type-specifier (TYPE) has been parsed which cannot be followed by
2284 "<" in any valid C++ program. If the next token is indeed "<",
2285 issue a message warning the user about what appears to be an
2286 invalid attempt to form a template-id. LOCATION is the location
2287 of the type-specifier (TYPE) */
2290 cp_parser_check_for_invalid_template_id (cp_parser* parser,
2291 tree type, location_t location)
2293 cp_token_position start = 0;
2295 if (cp_lexer_next_token_is (parser->lexer, CPP_LESS))
2298 error_at (location, "%qT is not a template", type);
2299 else if (TREE_CODE (type) == IDENTIFIER_NODE)
2300 error_at (location, "%qE is not a template", type);
2302 error_at (location, "invalid template-id");
2303 /* Remember the location of the invalid "<". */
2304 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
2305 start = cp_lexer_token_position (parser->lexer, true);
2306 /* Consume the "<". */
2307 cp_lexer_consume_token (parser->lexer);
2308 /* Parse the template arguments. */
2309 cp_parser_enclosed_template_argument_list (parser);
2310 /* Permanently remove the invalid template arguments so that
2311 this error message is not issued again. */
2313 cp_lexer_purge_tokens_after (parser->lexer, start);
2317 /* If parsing an integral constant-expression, issue an error message
2318 about the fact that THING appeared and return true. Otherwise,
2319 return false. In either case, set
2320 PARSER->NON_INTEGRAL_CONSTANT_EXPRESSION_P. */
2323 cp_parser_non_integral_constant_expression (cp_parser *parser,
2324 non_integral_constant thing)
2326 parser->non_integral_constant_expression_p = true;
2327 if (parser->integral_constant_expression_p)
2329 if (!parser->allow_non_integral_constant_expression_p)
2331 const char *msg = NULL;
2335 error ("floating-point literal "
2336 "cannot appear in a constant-expression");
2339 error ("a cast to a type other than an integral or "
2340 "enumeration type cannot appear in a "
2341 "constant-expression");
2344 error ("%<typeid%> operator "
2345 "cannot appear in a constant-expression");
2348 error ("non-constant compound literals "
2349 "cannot appear in a constant-expression");
2352 error ("a function call "
2353 "cannot appear in a constant-expression");
2356 error ("an increment "
2357 "cannot appear in a constant-expression");
2360 error ("an decrement "
2361 "cannot appear in a constant-expression");
2364 error ("an array reference "
2365 "cannot appear in a constant-expression");
2367 case NIC_ADDR_LABEL:
2368 error ("the address of a label "
2369 "cannot appear in a constant-expression");
2371 case NIC_OVERLOADED:
2372 error ("calls to overloaded operators "
2373 "cannot appear in a constant-expression");
2375 case NIC_ASSIGNMENT:
2376 error ("an assignment cannot appear in a constant-expression");
2379 error ("a comma operator "
2380 "cannot appear in a constant-expression");
2382 case NIC_CONSTRUCTOR:
2383 error ("a call to a constructor "
2384 "cannot appear in a constant-expression");
2390 msg = "__FUNCTION__";
2392 case NIC_PRETTY_FUNC:
2393 msg = "__PRETTY_FUNCTION__";
2413 case NIC_PREINCREMENT:
2416 case NIC_PREDECREMENT:
2429 error ("%qs cannot appear in a constant-expression", msg);
2436 /* Emit a diagnostic for an invalid type name. SCOPE is the
2437 qualifying scope (or NULL, if none) for ID. This function commits
2438 to the current active tentative parse, if any. (Otherwise, the
2439 problematic construct might be encountered again later, resulting
2440 in duplicate error messages.) LOCATION is the location of ID. */
2443 cp_parser_diagnose_invalid_type_name (cp_parser *parser,
2444 tree scope, tree id,
2445 location_t location)
2447 tree decl, old_scope;
2448 cp_parser_commit_to_tentative_parse (parser);
2449 /* Try to lookup the identifier. */
2450 old_scope = parser->scope;
2451 parser->scope = scope;
2452 decl = cp_parser_lookup_name_simple (parser, id, location);
2453 parser->scope = old_scope;
2454 /* If the lookup found a template-name, it means that the user forgot
2455 to specify an argument list. Emit a useful error message. */
2456 if (TREE_CODE (decl) == TEMPLATE_DECL)
2458 "invalid use of template-name %qE without an argument list",
2460 else if (TREE_CODE (id) == BIT_NOT_EXPR)
2461 error_at (location, "invalid use of destructor %qD as a type", id);
2462 else if (TREE_CODE (decl) == TYPE_DECL)
2463 /* Something like 'unsigned A a;' */
2464 error_at (location, "invalid combination of multiple type-specifiers");
2465 else if (!parser->scope)
2467 /* Issue an error message. */
2468 error_at (location, "%qE does not name a type", id);
2469 /* If we're in a template class, it's possible that the user was
2470 referring to a type from a base class. For example:
2472 template <typename T> struct A { typedef T X; };
2473 template <typename T> struct B : public A<T> { X x; };
2475 The user should have said "typename A<T>::X". */
2476 if (cxx_dialect < cxx0x && id == ridpointers[(int)RID_CONSTEXPR])
2477 inform (location, "C++0x %<constexpr%> only available with "
2478 "-std=c++0x or -std=gnu++0x");
2479 else if (processing_template_decl && current_class_type
2480 && TYPE_BINFO (current_class_type))
2484 for (b = TREE_CHAIN (TYPE_BINFO (current_class_type));
2488 tree base_type = BINFO_TYPE (b);
2489 if (CLASS_TYPE_P (base_type)
2490 && dependent_type_p (base_type))
2493 /* Go from a particular instantiation of the
2494 template (which will have an empty TYPE_FIELDs),
2495 to the main version. */
2496 base_type = CLASSTYPE_PRIMARY_TEMPLATE_TYPE (base_type);
2497 for (field = TYPE_FIELDS (base_type);
2499 field = DECL_CHAIN (field))
2500 if (TREE_CODE (field) == TYPE_DECL
2501 && DECL_NAME (field) == id)
2504 "(perhaps %<typename %T::%E%> was intended)",
2505 BINFO_TYPE (b), id);
2514 /* Here we diagnose qualified-ids where the scope is actually correct,
2515 but the identifier does not resolve to a valid type name. */
2516 else if (parser->scope != error_mark_node)
2518 if (TREE_CODE (parser->scope) == NAMESPACE_DECL)
2519 error_at (location, "%qE in namespace %qE does not name a type",
2521 else if (CLASS_TYPE_P (parser->scope)
2522 && constructor_name_p (id, parser->scope))
2525 error_at (location, "%<%T::%E%> names the constructor, not"
2526 " the type", parser->scope, id);
2527 if (cp_lexer_next_token_is (parser->lexer, CPP_LESS))
2528 error_at (location, "and %qT has no template constructors",
2531 else if (TYPE_P (parser->scope)
2532 && dependent_scope_p (parser->scope))
2533 error_at (location, "need %<typename%> before %<%T::%E%> because "
2534 "%qT is a dependent scope",
2535 parser->scope, id, parser->scope);
2536 else if (TYPE_P (parser->scope))
2537 error_at (location, "%qE in %q#T does not name a type",
2544 /* Check for a common situation where a type-name should be present,
2545 but is not, and issue a sensible error message. Returns true if an
2546 invalid type-name was detected.
2548 The situation handled by this function are variable declarations of the
2549 form `ID a', where `ID' is an id-expression and `a' is a plain identifier.
2550 Usually, `ID' should name a type, but if we got here it means that it
2551 does not. We try to emit the best possible error message depending on
2552 how exactly the id-expression looks like. */
2555 cp_parser_parse_and_diagnose_invalid_type_name (cp_parser *parser)
2558 cp_token *token = cp_lexer_peek_token (parser->lexer);
2560 /* Avoid duplicate error about ambiguous lookup. */
2561 if (token->type == CPP_NESTED_NAME_SPECIFIER)
2563 cp_token *next = cp_lexer_peek_nth_token (parser->lexer, 2);
2564 if (next->type == CPP_NAME && next->ambiguous_p)
2568 cp_parser_parse_tentatively (parser);
2569 id = cp_parser_id_expression (parser,
2570 /*template_keyword_p=*/false,
2571 /*check_dependency_p=*/true,
2572 /*template_p=*/NULL,
2573 /*declarator_p=*/true,
2574 /*optional_p=*/false);
2575 /* If the next token is a (, this is a function with no explicit return
2576 type, i.e. constructor, destructor or conversion op. */
2577 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN)
2578 || TREE_CODE (id) == TYPE_DECL)
2580 cp_parser_abort_tentative_parse (parser);
2583 if (!cp_parser_parse_definitely (parser))
2586 /* Emit a diagnostic for the invalid type. */
2587 cp_parser_diagnose_invalid_type_name (parser, parser->scope,
2588 id, token->location);
2590 /* If we aren't in the middle of a declarator (i.e. in a
2591 parameter-declaration-clause), skip to the end of the declaration;
2592 there's no point in trying to process it. */
2593 if (!parser->in_declarator_p)
2594 cp_parser_skip_to_end_of_block_or_statement (parser);
2598 /* Consume tokens up to, and including, the next non-nested closing `)'.
2599 Returns 1 iff we found a closing `)'. RECOVERING is true, if we
2600 are doing error recovery. Returns -1 if OR_COMMA is true and we
2601 found an unnested comma. */
2604 cp_parser_skip_to_closing_parenthesis (cp_parser *parser,
2609 unsigned paren_depth = 0;
2610 unsigned brace_depth = 0;
2611 unsigned square_depth = 0;
2613 if (recovering && !or_comma
2614 && cp_parser_uncommitted_to_tentative_parse_p (parser))
2619 cp_token * token = cp_lexer_peek_token (parser->lexer);
2621 switch (token->type)
2624 case CPP_PRAGMA_EOL:
2625 /* If we've run out of tokens, then there is no closing `)'. */
2628 /* This is good for lambda expression capture-lists. */
2629 case CPP_OPEN_SQUARE:
2632 case CPP_CLOSE_SQUARE:
2633 if (!square_depth--)
2638 /* This matches the processing in skip_to_end_of_statement. */
2643 case CPP_OPEN_BRACE:
2646 case CPP_CLOSE_BRACE:
2652 if (recovering && or_comma && !brace_depth && !paren_depth
2657 case CPP_OPEN_PAREN:
2662 case CPP_CLOSE_PAREN:
2663 if (!brace_depth && !paren_depth--)
2666 cp_lexer_consume_token (parser->lexer);
2675 /* Consume the token. */
2676 cp_lexer_consume_token (parser->lexer);
2680 /* Consume tokens until we reach the end of the current statement.
2681 Normally, that will be just before consuming a `;'. However, if a
2682 non-nested `}' comes first, then we stop before consuming that. */
2685 cp_parser_skip_to_end_of_statement (cp_parser* parser)
2687 unsigned nesting_depth = 0;
2691 cp_token *token = cp_lexer_peek_token (parser->lexer);
2693 switch (token->type)
2696 case CPP_PRAGMA_EOL:
2697 /* If we've run out of tokens, stop. */
2701 /* If the next token is a `;', we have reached the end of the
2707 case CPP_CLOSE_BRACE:
2708 /* If this is a non-nested '}', stop before consuming it.
2709 That way, when confronted with something like:
2713 we stop before consuming the closing '}', even though we
2714 have not yet reached a `;'. */
2715 if (nesting_depth == 0)
2718 /* If it is the closing '}' for a block that we have
2719 scanned, stop -- but only after consuming the token.
2725 we will stop after the body of the erroneously declared
2726 function, but before consuming the following `typedef'
2728 if (--nesting_depth == 0)
2730 cp_lexer_consume_token (parser->lexer);
2734 case CPP_OPEN_BRACE:
2742 /* Consume the token. */
2743 cp_lexer_consume_token (parser->lexer);
2747 /* This function is called at the end of a statement or declaration.
2748 If the next token is a semicolon, it is consumed; otherwise, error
2749 recovery is attempted. */
2752 cp_parser_consume_semicolon_at_end_of_statement (cp_parser *parser)
2754 /* Look for the trailing `;'. */
2755 if (!cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON))
2757 /* If there is additional (erroneous) input, skip to the end of
2759 cp_parser_skip_to_end_of_statement (parser);
2760 /* If the next token is now a `;', consume it. */
2761 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
2762 cp_lexer_consume_token (parser->lexer);
2766 /* Skip tokens until we have consumed an entire block, or until we
2767 have consumed a non-nested `;'. */
2770 cp_parser_skip_to_end_of_block_or_statement (cp_parser* parser)
2772 int nesting_depth = 0;
2774 while (nesting_depth >= 0)
2776 cp_token *token = cp_lexer_peek_token (parser->lexer);
2778 switch (token->type)
2781 case CPP_PRAGMA_EOL:
2782 /* If we've run out of tokens, stop. */
2786 /* Stop if this is an unnested ';'. */
2791 case CPP_CLOSE_BRACE:
2792 /* Stop if this is an unnested '}', or closes the outermost
2795 if (nesting_depth < 0)
2801 case CPP_OPEN_BRACE:
2810 /* Consume the token. */
2811 cp_lexer_consume_token (parser->lexer);
2815 /* Skip tokens until a non-nested closing curly brace is the next
2816 token, or there are no more tokens. Return true in the first case,
2820 cp_parser_skip_to_closing_brace (cp_parser *parser)
2822 unsigned nesting_depth = 0;
2826 cp_token *token = cp_lexer_peek_token (parser->lexer);
2828 switch (token->type)
2831 case CPP_PRAGMA_EOL:
2832 /* If we've run out of tokens, stop. */
2835 case CPP_CLOSE_BRACE:
2836 /* If the next token is a non-nested `}', then we have reached
2837 the end of the current block. */
2838 if (nesting_depth-- == 0)
2842 case CPP_OPEN_BRACE:
2843 /* If it the next token is a `{', then we are entering a new
2844 block. Consume the entire block. */
2852 /* Consume the token. */
2853 cp_lexer_consume_token (parser->lexer);
2857 /* Consume tokens until we reach the end of the pragma. The PRAGMA_TOK
2858 parameter is the PRAGMA token, allowing us to purge the entire pragma
2862 cp_parser_skip_to_pragma_eol (cp_parser* parser, cp_token *pragma_tok)
2866 parser->lexer->in_pragma = false;
2869 token = cp_lexer_consume_token (parser->lexer);
2870 while (token->type != CPP_PRAGMA_EOL && token->type != CPP_EOF);
2872 /* Ensure that the pragma is not parsed again. */
2873 cp_lexer_purge_tokens_after (parser->lexer, pragma_tok);
2876 /* Require pragma end of line, resyncing with it as necessary. The
2877 arguments are as for cp_parser_skip_to_pragma_eol. */
2880 cp_parser_require_pragma_eol (cp_parser *parser, cp_token *pragma_tok)
2882 parser->lexer->in_pragma = false;
2883 if (!cp_parser_require (parser, CPP_PRAGMA_EOL, RT_PRAGMA_EOL))
2884 cp_parser_skip_to_pragma_eol (parser, pragma_tok);
2887 /* This is a simple wrapper around make_typename_type. When the id is
2888 an unresolved identifier node, we can provide a superior diagnostic
2889 using cp_parser_diagnose_invalid_type_name. */
2892 cp_parser_make_typename_type (cp_parser *parser, tree scope,
2893 tree id, location_t id_location)
2896 if (TREE_CODE (id) == IDENTIFIER_NODE)
2898 result = make_typename_type (scope, id, typename_type,
2899 /*complain=*/tf_none);
2900 if (result == error_mark_node)
2901 cp_parser_diagnose_invalid_type_name (parser, scope, id, id_location);
2904 return make_typename_type (scope, id, typename_type, tf_error);
2907 /* This is a wrapper around the
2908 make_{pointer,ptrmem,reference}_declarator functions that decides
2909 which one to call based on the CODE and CLASS_TYPE arguments. The
2910 CODE argument should be one of the values returned by
2911 cp_parser_ptr_operator. */
2912 static cp_declarator *
2913 cp_parser_make_indirect_declarator (enum tree_code code, tree class_type,
2914 cp_cv_quals cv_qualifiers,
2915 cp_declarator *target)
2917 if (code == ERROR_MARK)
2918 return cp_error_declarator;
2920 if (code == INDIRECT_REF)
2921 if (class_type == NULL_TREE)
2922 return make_pointer_declarator (cv_qualifiers, target);
2924 return make_ptrmem_declarator (cv_qualifiers, class_type, target);
2925 else if (code == ADDR_EXPR && class_type == NULL_TREE)
2926 return make_reference_declarator (cv_qualifiers, target, false);
2927 else if (code == NON_LVALUE_EXPR && class_type == NULL_TREE)
2928 return make_reference_declarator (cv_qualifiers, target, true);
2932 /* Create a new C++ parser. */
2935 cp_parser_new (void)
2941 /* cp_lexer_new_main is called before doing GC allocation because
2942 cp_lexer_new_main might load a PCH file. */
2943 lexer = cp_lexer_new_main ();
2945 /* Initialize the binops_by_token so that we can get the tree
2946 directly from the token. */
2947 for (i = 0; i < sizeof (binops) / sizeof (binops[0]); i++)
2948 binops_by_token[binops[i].token_type] = binops[i];
2950 parser = ggc_alloc_cleared_cp_parser ();
2951 parser->lexer = lexer;
2952 parser->context = cp_parser_context_new (NULL);
2954 /* For now, we always accept GNU extensions. */
2955 parser->allow_gnu_extensions_p = 1;
2957 /* The `>' token is a greater-than operator, not the end of a
2959 parser->greater_than_is_operator_p = true;
2961 parser->default_arg_ok_p = true;
2963 /* We are not parsing a constant-expression. */
2964 parser->integral_constant_expression_p = false;
2965 parser->allow_non_integral_constant_expression_p = false;
2966 parser->non_integral_constant_expression_p = false;
2968 /* Local variable names are not forbidden. */
2969 parser->local_variables_forbidden_p = false;
2971 /* We are not processing an `extern "C"' declaration. */
2972 parser->in_unbraced_linkage_specification_p = false;
2974 /* We are not processing a declarator. */
2975 parser->in_declarator_p = false;
2977 /* We are not processing a template-argument-list. */
2978 parser->in_template_argument_list_p = false;
2980 /* We are not in an iteration statement. */
2981 parser->in_statement = 0;
2983 /* We are not in a switch statement. */
2984 parser->in_switch_statement_p = false;
2986 /* We are not parsing a type-id inside an expression. */
2987 parser->in_type_id_in_expr_p = false;
2989 /* Declarations aren't implicitly extern "C". */
2990 parser->implicit_extern_c = false;
2992 /* String literals should be translated to the execution character set. */
2993 parser->translate_strings_p = true;
2995 /* We are not parsing a function body. */
2996 parser->in_function_body = false;
2998 /* We can correct until told otherwise. */
2999 parser->colon_corrects_to_scope_p = true;
3001 /* The unparsed function queue is empty. */
3002 push_unparsed_function_queues (parser);
3004 /* There are no classes being defined. */
3005 parser->num_classes_being_defined = 0;
3007 /* No template parameters apply. */
3008 parser->num_template_parameter_lists = 0;
3013 /* Create a cp_lexer structure which will emit the tokens in CACHE
3014 and push it onto the parser's lexer stack. This is used for delayed
3015 parsing of in-class method bodies and default arguments, and should
3016 not be confused with tentative parsing. */
3018 cp_parser_push_lexer_for_tokens (cp_parser *parser, cp_token_cache *cache)
3020 cp_lexer *lexer = cp_lexer_new_from_tokens (cache);
3021 lexer->next = parser->lexer;
3022 parser->lexer = lexer;
3024 /* Move the current source position to that of the first token in the
3026 cp_lexer_set_source_position_from_token (lexer->next_token);
3029 /* Pop the top lexer off the parser stack. This is never used for the
3030 "main" lexer, only for those pushed by cp_parser_push_lexer_for_tokens. */
3032 cp_parser_pop_lexer (cp_parser *parser)
3034 cp_lexer *lexer = parser->lexer;
3035 parser->lexer = lexer->next;
3036 cp_lexer_destroy (lexer);
3038 /* Put the current source position back where it was before this
3039 lexer was pushed. */
3040 cp_lexer_set_source_position_from_token (parser->lexer->next_token);
3043 /* Lexical conventions [gram.lex] */
3045 /* Parse an identifier. Returns an IDENTIFIER_NODE representing the
3049 cp_parser_identifier (cp_parser* parser)
3053 /* Look for the identifier. */
3054 token = cp_parser_require (parser, CPP_NAME, RT_NAME);
3055 /* Return the value. */
3056 return token ? token->u.value : error_mark_node;
3059 /* Parse a sequence of adjacent string constants. Returns a
3060 TREE_STRING representing the combined, nul-terminated string
3061 constant. If TRANSLATE is true, translate the string to the
3062 execution character set. If WIDE_OK is true, a wide string is
3065 C++98 [lex.string] says that if a narrow string literal token is
3066 adjacent to a wide string literal token, the behavior is undefined.
3067 However, C99 6.4.5p4 says that this results in a wide string literal.
3068 We follow C99 here, for consistency with the C front end.
3070 This code is largely lifted from lex_string() in c-lex.c.
3072 FUTURE: ObjC++ will need to handle @-strings here. */
3074 cp_parser_string_literal (cp_parser *parser, bool translate, bool wide_ok)
3078 struct obstack str_ob;
3079 cpp_string str, istr, *strs;
3081 enum cpp_ttype type;
3083 tok = cp_lexer_peek_token (parser->lexer);
3084 if (!cp_parser_is_string_literal (tok))
3086 cp_parser_error (parser, "expected string-literal");
3087 return error_mark_node;
3092 /* Try to avoid the overhead of creating and destroying an obstack
3093 for the common case of just one string. */
3094 if (!cp_parser_is_string_literal
3095 (cp_lexer_peek_nth_token (parser->lexer, 2)))
3097 cp_lexer_consume_token (parser->lexer);
3099 str.text = (const unsigned char *)TREE_STRING_POINTER (tok->u.value);
3100 str.len = TREE_STRING_LENGTH (tok->u.value);
3107 gcc_obstack_init (&str_ob);
3112 cp_lexer_consume_token (parser->lexer);
3114 str.text = (const unsigned char *)TREE_STRING_POINTER (tok->u.value);
3115 str.len = TREE_STRING_LENGTH (tok->u.value);
3117 if (type != tok->type)
3119 if (type == CPP_STRING)
3121 else if (tok->type != CPP_STRING)
3122 error_at (tok->location,
3123 "unsupported non-standard concatenation "
3124 "of string literals");
3127 obstack_grow (&str_ob, &str, sizeof (cpp_string));
3129 tok = cp_lexer_peek_token (parser->lexer);
3131 while (cp_parser_is_string_literal (tok));
3133 strs = (cpp_string *) obstack_finish (&str_ob);
3136 if (type != CPP_STRING && !wide_ok)
3138 cp_parser_error (parser, "a wide string is invalid in this context");
3142 if ((translate ? cpp_interpret_string : cpp_interpret_string_notranslate)
3143 (parse_in, strs, count, &istr, type))
3145 value = build_string (istr.len, (const char *)istr.text);
3146 free (CONST_CAST (unsigned char *, istr.text));
3152 case CPP_UTF8STRING:
3153 TREE_TYPE (value) = char_array_type_node;
3156 TREE_TYPE (value) = char16_array_type_node;
3159 TREE_TYPE (value) = char32_array_type_node;
3162 TREE_TYPE (value) = wchar_array_type_node;
3166 value = fix_string_type (value);
3169 /* cpp_interpret_string has issued an error. */
3170 value = error_mark_node;
3173 obstack_free (&str_ob, 0);
3179 /* Basic concepts [gram.basic] */
3181 /* Parse a translation-unit.
3184 declaration-seq [opt]
3186 Returns TRUE if all went well. */
3189 cp_parser_translation_unit (cp_parser* parser)
3191 /* The address of the first non-permanent object on the declarator
3193 static void *declarator_obstack_base;
3197 /* Create the declarator obstack, if necessary. */
3198 if (!cp_error_declarator)
3200 gcc_obstack_init (&declarator_obstack);
3201 /* Create the error declarator. */
3202 cp_error_declarator = make_declarator (cdk_error);
3203 /* Create the empty parameter list. */
3204 no_parameters = make_parameter_declarator (NULL, NULL, NULL_TREE);
3205 /* Remember where the base of the declarator obstack lies. */
3206 declarator_obstack_base = obstack_next_free (&declarator_obstack);
3209 cp_parser_declaration_seq_opt (parser);
3211 /* If there are no tokens left then all went well. */
3212 if (cp_lexer_next_token_is (parser->lexer, CPP_EOF))
3214 /* Get rid of the token array; we don't need it any more. */
3215 cp_lexer_destroy (parser->lexer);
3216 parser->lexer = NULL;
3218 /* This file might have been a context that's implicitly extern
3219 "C". If so, pop the lang context. (Only relevant for PCH.) */
3220 if (parser->implicit_extern_c)
3222 pop_lang_context ();
3223 parser->implicit_extern_c = false;
3227 finish_translation_unit ();
3233 cp_parser_error (parser, "expected declaration");
3237 /* Make sure the declarator obstack was fully cleaned up. */
3238 gcc_assert (obstack_next_free (&declarator_obstack)
3239 == declarator_obstack_base);
3241 /* All went well. */
3245 /* Expressions [gram.expr] */
3247 /* Parse a primary-expression.
3258 ( compound-statement )
3259 __builtin_va_arg ( assignment-expression , type-id )
3260 __builtin_offsetof ( type-id , offsetof-expression )
3263 __has_nothrow_assign ( type-id )
3264 __has_nothrow_constructor ( type-id )
3265 __has_nothrow_copy ( type-id )
3266 __has_trivial_assign ( type-id )
3267 __has_trivial_constructor ( type-id )
3268 __has_trivial_copy ( type-id )
3269 __has_trivial_destructor ( type-id )
3270 __has_virtual_destructor ( type-id )
3271 __is_abstract ( type-id )
3272 __is_base_of ( type-id , type-id )
3273 __is_class ( type-id )
3274 __is_convertible_to ( type-id , type-id )
3275 __is_empty ( type-id )
3276 __is_enum ( type-id )
3277 __is_literal_type ( type-id )
3278 __is_pod ( type-id )
3279 __is_polymorphic ( type-id )
3280 __is_std_layout ( type-id )
3281 __is_trivial ( type-id )
3282 __is_union ( type-id )
3284 Objective-C++ Extension:
3292 ADDRESS_P is true iff this expression was immediately preceded by
3293 "&" and therefore might denote a pointer-to-member. CAST_P is true
3294 iff this expression is the target of a cast. TEMPLATE_ARG_P is
3295 true iff this expression is a template argument.
3297 Returns a representation of the expression. Upon return, *IDK
3298 indicates what kind of id-expression (if any) was present. */
3301 cp_parser_primary_expression (cp_parser *parser,
3304 bool template_arg_p,
3307 cp_token *token = NULL;
3309 /* Assume the primary expression is not an id-expression. */
3310 *idk = CP_ID_KIND_NONE;
3312 /* Peek at the next token. */
3313 token = cp_lexer_peek_token (parser->lexer);
3314 switch (token->type)
3327 token = cp_lexer_consume_token (parser->lexer);
3328 if (TREE_CODE (token->u.value) == FIXED_CST)
3330 error_at (token->location,
3331 "fixed-point types not supported in C++");
3332 return error_mark_node;
3334 /* Floating-point literals are only allowed in an integral
3335 constant expression if they are cast to an integral or
3336 enumeration type. */
3337 if (TREE_CODE (token->u.value) == REAL_CST
3338 && parser->integral_constant_expression_p
3341 /* CAST_P will be set even in invalid code like "int(2.7 +
3342 ...)". Therefore, we have to check that the next token
3343 is sure to end the cast. */
3346 cp_token *next_token;
3348 next_token = cp_lexer_peek_token (parser->lexer);
3349 if (/* The comma at the end of an
3350 enumerator-definition. */
3351 next_token->type != CPP_COMMA
3352 /* The curly brace at the end of an enum-specifier. */
3353 && next_token->type != CPP_CLOSE_BRACE
3354 /* The end of a statement. */
3355 && next_token->type != CPP_SEMICOLON
3356 /* The end of the cast-expression. */
3357 && next_token->type != CPP_CLOSE_PAREN
3358 /* The end of an array bound. */
3359 && next_token->type != CPP_CLOSE_SQUARE
3360 /* The closing ">" in a template-argument-list. */
3361 && (next_token->type != CPP_GREATER
3362 || parser->greater_than_is_operator_p)
3363 /* C++0x only: A ">>" treated like two ">" tokens,
3364 in a template-argument-list. */
3365 && (next_token->type != CPP_RSHIFT
3366 || (cxx_dialect == cxx98)
3367 || parser->greater_than_is_operator_p))
3371 /* If we are within a cast, then the constraint that the
3372 cast is to an integral or enumeration type will be
3373 checked at that point. If we are not within a cast, then
3374 this code is invalid. */
3376 cp_parser_non_integral_constant_expression (parser, NIC_FLOAT);
3378 return token->u.value;
3384 case CPP_UTF8STRING:
3385 /* ??? Should wide strings be allowed when parser->translate_strings_p
3386 is false (i.e. in attributes)? If not, we can kill the third
3387 argument to cp_parser_string_literal. */
3388 return cp_parser_string_literal (parser,
3389 parser->translate_strings_p,
3392 case CPP_OPEN_PAREN:
3395 bool saved_greater_than_is_operator_p;
3397 /* Consume the `('. */
3398 cp_lexer_consume_token (parser->lexer);
3399 /* Within a parenthesized expression, a `>' token is always
3400 the greater-than operator. */
3401 saved_greater_than_is_operator_p
3402 = parser->greater_than_is_operator_p;
3403 parser->greater_than_is_operator_p = true;
3404 /* If we see `( { ' then we are looking at the beginning of
3405 a GNU statement-expression. */
3406 if (cp_parser_allow_gnu_extensions_p (parser)
3407 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
3409 /* Statement-expressions are not allowed by the standard. */
3410 pedwarn (token->location, OPT_pedantic,
3411 "ISO C++ forbids braced-groups within expressions");
3413 /* And they're not allowed outside of a function-body; you
3414 cannot, for example, write:
3416 int i = ({ int j = 3; j + 1; });
3418 at class or namespace scope. */
3419 if (!parser->in_function_body
3420 || parser->in_template_argument_list_p)
3422 error_at (token->location,
3423 "statement-expressions are not allowed outside "
3424 "functions nor in template-argument lists");
3425 cp_parser_skip_to_end_of_block_or_statement (parser);
3426 expr = error_mark_node;
3430 /* Start the statement-expression. */
3431 expr = begin_stmt_expr ();
3432 /* Parse the compound-statement. */
3433 cp_parser_compound_statement (parser, expr, false, false);
3435 expr = finish_stmt_expr (expr, false);
3440 /* Parse the parenthesized expression. */
3441 expr = cp_parser_expression (parser, cast_p, idk);
3442 /* Let the front end know that this expression was
3443 enclosed in parentheses. This matters in case, for
3444 example, the expression is of the form `A::B', since
3445 `&A::B' might be a pointer-to-member, but `&(A::B)' is
3447 finish_parenthesized_expr (expr);
3448 /* DR 705: Wrapping an unqualified name in parentheses
3449 suppresses arg-dependent lookup. We want to pass back
3450 CP_ID_KIND_QUALIFIED for suppressing vtable lookup
3451 (c++/37862), but none of the others. */
3452 if (*idk != CP_ID_KIND_QUALIFIED)
3453 *idk = CP_ID_KIND_NONE;
3455 /* The `>' token might be the end of a template-id or
3456 template-parameter-list now. */
3457 parser->greater_than_is_operator_p
3458 = saved_greater_than_is_operator_p;
3459 /* Consume the `)'. */
3460 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
3461 cp_parser_skip_to_end_of_statement (parser);
3466 case CPP_OPEN_SQUARE:
3467 if (c_dialect_objc ())
3468 /* We have an Objective-C++ message. */
3469 return cp_parser_objc_expression (parser);
3471 tree lam = cp_parser_lambda_expression (parser);
3472 /* Don't warn about a failed tentative parse. */
3473 if (cp_parser_error_occurred (parser))
3474 return error_mark_node;
3475 maybe_warn_cpp0x (CPP0X_LAMBDA_EXPR);
3479 case CPP_OBJC_STRING:
3480 if (c_dialect_objc ())
3481 /* We have an Objective-C++ string literal. */
3482 return cp_parser_objc_expression (parser);
3483 cp_parser_error (parser, "expected primary-expression");
3484 return error_mark_node;
3487 switch (token->keyword)
3489 /* These two are the boolean literals. */
3491 cp_lexer_consume_token (parser->lexer);
3492 return boolean_true_node;
3494 cp_lexer_consume_token (parser->lexer);
3495 return boolean_false_node;
3497 /* The `__null' literal. */
3499 cp_lexer_consume_token (parser->lexer);
3502 /* The `nullptr' literal. */
3504 cp_lexer_consume_token (parser->lexer);
3505 return nullptr_node;
3507 /* Recognize the `this' keyword. */
3509 cp_lexer_consume_token (parser->lexer);
3510 if (parser->local_variables_forbidden_p)
3512 error_at (token->location,
3513 "%<this%> may not be used in this context");
3514 return error_mark_node;
3516 /* Pointers cannot appear in constant-expressions. */
3517 if (cp_parser_non_integral_constant_expression (parser, NIC_THIS))
3518 return error_mark_node;
3519 return finish_this_expr ();
3521 /* The `operator' keyword can be the beginning of an
3526 case RID_FUNCTION_NAME:
3527 case RID_PRETTY_FUNCTION_NAME:
3528 case RID_C99_FUNCTION_NAME:
3530 non_integral_constant name;
3532 /* The symbols __FUNCTION__, __PRETTY_FUNCTION__, and
3533 __func__ are the names of variables -- but they are
3534 treated specially. Therefore, they are handled here,
3535 rather than relying on the generic id-expression logic
3536 below. Grammatically, these names are id-expressions.
3538 Consume the token. */
3539 token = cp_lexer_consume_token (parser->lexer);
3541 switch (token->keyword)
3543 case RID_FUNCTION_NAME:
3544 name = NIC_FUNC_NAME;
3546 case RID_PRETTY_FUNCTION_NAME:
3547 name = NIC_PRETTY_FUNC;
3549 case RID_C99_FUNCTION_NAME:
3550 name = NIC_C99_FUNC;
3556 if (cp_parser_non_integral_constant_expression (parser, name))
3557 return error_mark_node;
3559 /* Look up the name. */
3560 return finish_fname (token->u.value);
3568 /* The `__builtin_va_arg' construct is used to handle
3569 `va_arg'. Consume the `__builtin_va_arg' token. */
3570 cp_lexer_consume_token (parser->lexer);
3571 /* Look for the opening `('. */
3572 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
3573 /* Now, parse the assignment-expression. */
3574 expression = cp_parser_assignment_expression (parser,
3575 /*cast_p=*/false, NULL);
3576 /* Look for the `,'. */
3577 cp_parser_require (parser, CPP_COMMA, RT_COMMA);
3578 /* Parse the type-id. */
3579 type = cp_parser_type_id (parser);
3580 /* Look for the closing `)'. */
3581 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
3582 /* Using `va_arg' in a constant-expression is not
3584 if (cp_parser_non_integral_constant_expression (parser,
3586 return error_mark_node;
3587 return build_x_va_arg (expression, type);
3591 return cp_parser_builtin_offsetof (parser);
3593 case RID_HAS_NOTHROW_ASSIGN:
3594 case RID_HAS_NOTHROW_CONSTRUCTOR:
3595 case RID_HAS_NOTHROW_COPY:
3596 case RID_HAS_TRIVIAL_ASSIGN:
3597 case RID_HAS_TRIVIAL_CONSTRUCTOR:
3598 case RID_HAS_TRIVIAL_COPY:
3599 case RID_HAS_TRIVIAL_DESTRUCTOR:
3600 case RID_HAS_VIRTUAL_DESTRUCTOR:
3601 case RID_IS_ABSTRACT:
3602 case RID_IS_BASE_OF:
3604 case RID_IS_CONVERTIBLE_TO:
3607 case RID_IS_LITERAL_TYPE:
3609 case RID_IS_POLYMORPHIC:
3610 case RID_IS_STD_LAYOUT:
3611 case RID_IS_TRIVIAL:
3613 return cp_parser_trait_expr (parser, token->keyword);
3615 /* Objective-C++ expressions. */
3617 case RID_AT_PROTOCOL:
3618 case RID_AT_SELECTOR:
3619 return cp_parser_objc_expression (parser);
3622 if (parser->in_function_body
3623 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
3626 error_at (token->location,
3627 "a template declaration cannot appear at block scope");
3628 cp_parser_skip_to_end_of_block_or_statement (parser);
3629 return error_mark_node;
3632 cp_parser_error (parser, "expected primary-expression");
3633 return error_mark_node;
3636 /* An id-expression can start with either an identifier, a
3637 `::' as the beginning of a qualified-id, or the "operator"
3641 case CPP_TEMPLATE_ID:
3642 case CPP_NESTED_NAME_SPECIFIER:
3646 const char *error_msg;
3649 cp_token *id_expr_token;
3652 /* Parse the id-expression. */
3654 = cp_parser_id_expression (parser,
3655 /*template_keyword_p=*/false,
3656 /*check_dependency_p=*/true,
3658 /*declarator_p=*/false,
3659 /*optional_p=*/false);
3660 if (id_expression == error_mark_node)
3661 return error_mark_node;
3662 id_expr_token = token;
3663 token = cp_lexer_peek_token (parser->lexer);
3664 done = (token->type != CPP_OPEN_SQUARE
3665 && token->type != CPP_OPEN_PAREN
3666 && token->type != CPP_DOT
3667 && token->type != CPP_DEREF
3668 && token->type != CPP_PLUS_PLUS
3669 && token->type != CPP_MINUS_MINUS);
3670 /* If we have a template-id, then no further lookup is
3671 required. If the template-id was for a template-class, we
3672 will sometimes have a TYPE_DECL at this point. */
3673 if (TREE_CODE (id_expression) == TEMPLATE_ID_EXPR
3674 || TREE_CODE (id_expression) == TYPE_DECL)
3675 decl = id_expression;
3676 /* Look up the name. */
3679 tree ambiguous_decls;
3681 /* If we already know that this lookup is ambiguous, then
3682 we've already issued an error message; there's no reason
3684 if (id_expr_token->type == CPP_NAME
3685 && id_expr_token->ambiguous_p)
3687 cp_parser_simulate_error (parser);
3688 return error_mark_node;
3691 decl = cp_parser_lookup_name (parser, id_expression,
3694 /*is_namespace=*/false,
3695 /*check_dependency=*/true,
3697 id_expr_token->location);
3698 /* If the lookup was ambiguous, an error will already have
3700 if (ambiguous_decls)
3701 return error_mark_node;
3703 /* In Objective-C++, we may have an Objective-C 2.0
3704 dot-syntax for classes here. */
3705 if (c_dialect_objc ()
3706 && cp_lexer_peek_token (parser->lexer)->type == CPP_DOT
3707 && TREE_CODE (decl) == TYPE_DECL
3708 && objc_is_class_name (decl))
3711 cp_lexer_consume_token (parser->lexer);
3712 component = cp_parser_identifier (parser);
3713 if (component == error_mark_node)
3714 return error_mark_node;
3716 return objc_build_class_component_ref (id_expression, component);
3719 /* In Objective-C++, an instance variable (ivar) may be preferred
3720 to whatever cp_parser_lookup_name() found. */
3721 decl = objc_lookup_ivar (decl, id_expression);
3723 /* If name lookup gives us a SCOPE_REF, then the
3724 qualifying scope was dependent. */
3725 if (TREE_CODE (decl) == SCOPE_REF)
3727 /* At this point, we do not know if DECL is a valid
3728 integral constant expression. We assume that it is
3729 in fact such an expression, so that code like:
3731 template <int N> struct A {
3735 is accepted. At template-instantiation time, we
3736 will check that B<N>::i is actually a constant. */
3739 /* Check to see if DECL is a local variable in a context
3740 where that is forbidden. */
3741 if (parser->local_variables_forbidden_p
3742 && local_variable_p (decl))
3744 /* It might be that we only found DECL because we are
3745 trying to be generous with pre-ISO scoping rules.
3746 For example, consider:
3750 for (int i = 0; i < 10; ++i) {}
3751 extern void f(int j = i);
3754 Here, name look up will originally find the out
3755 of scope `i'. We need to issue a warning message,
3756 but then use the global `i'. */
3757 decl = check_for_out_of_scope_variable (decl);
3758 if (local_variable_p (decl))
3760 error_at (id_expr_token->location,
3761 "local variable %qD may not appear in this context",
3763 return error_mark_node;
3768 decl = (finish_id_expression
3769 (id_expression, decl, parser->scope,
3771 parser->integral_constant_expression_p,
3772 parser->allow_non_integral_constant_expression_p,
3773 &parser->non_integral_constant_expression_p,
3774 template_p, done, address_p,
3777 id_expr_token->location));
3779 cp_parser_error (parser, error_msg);
3783 /* Anything else is an error. */
3785 cp_parser_error (parser, "expected primary-expression");
3786 return error_mark_node;
3790 /* Parse an id-expression.
3797 :: [opt] nested-name-specifier template [opt] unqualified-id
3799 :: operator-function-id
3802 Return a representation of the unqualified portion of the
3803 identifier. Sets PARSER->SCOPE to the qualifying scope if there is
3804 a `::' or nested-name-specifier.
3806 Often, if the id-expression was a qualified-id, the caller will
3807 want to make a SCOPE_REF to represent the qualified-id. This
3808 function does not do this in order to avoid wastefully creating
3809 SCOPE_REFs when they are not required.
3811 If TEMPLATE_KEYWORD_P is true, then we have just seen the
3814 If CHECK_DEPENDENCY_P is false, then names are looked up inside
3815 uninstantiated templates.
3817 If *TEMPLATE_P is non-NULL, it is set to true iff the
3818 `template' keyword is used to explicitly indicate that the entity
3819 named is a template.
3821 If DECLARATOR_P is true, the id-expression is appearing as part of
3822 a declarator, rather than as part of an expression. */
3825 cp_parser_id_expression (cp_parser *parser,
3826 bool template_keyword_p,
3827 bool check_dependency_p,
3832 bool global_scope_p;
3833 bool nested_name_specifier_p;
3835 /* Assume the `template' keyword was not used. */
3837 *template_p = template_keyword_p;
3839 /* Look for the optional `::' operator. */
3841 = (cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false)
3843 /* Look for the optional nested-name-specifier. */
3844 nested_name_specifier_p
3845 = (cp_parser_nested_name_specifier_opt (parser,
3846 /*typename_keyword_p=*/false,
3851 /* If there is a nested-name-specifier, then we are looking at
3852 the first qualified-id production. */
3853 if (nested_name_specifier_p)
3856 tree saved_object_scope;
3857 tree saved_qualifying_scope;
3858 tree unqualified_id;
3861 /* See if the next token is the `template' keyword. */
3863 template_p = &is_template;
3864 *template_p = cp_parser_optional_template_keyword (parser);
3865 /* Name lookup we do during the processing of the
3866 unqualified-id might obliterate SCOPE. */
3867 saved_scope = parser->scope;
3868 saved_object_scope = parser->object_scope;
3869 saved_qualifying_scope = parser->qualifying_scope;
3870 /* Process the final unqualified-id. */
3871 unqualified_id = cp_parser_unqualified_id (parser, *template_p,
3874 /*optional_p=*/false);
3875 /* Restore the SAVED_SCOPE for our caller. */
3876 parser->scope = saved_scope;
3877 parser->object_scope = saved_object_scope;
3878 parser->qualifying_scope = saved_qualifying_scope;
3880 return unqualified_id;
3882 /* Otherwise, if we are in global scope, then we are looking at one
3883 of the other qualified-id productions. */
3884 else if (global_scope_p)
3889 /* Peek at the next token. */
3890 token = cp_lexer_peek_token (parser->lexer);
3892 /* If it's an identifier, and the next token is not a "<", then
3893 we can avoid the template-id case. This is an optimization
3894 for this common case. */
3895 if (token->type == CPP_NAME
3896 && !cp_parser_nth_token_starts_template_argument_list_p
3898 return cp_parser_identifier (parser);
3900 cp_parser_parse_tentatively (parser);
3901 /* Try a template-id. */
3902 id = cp_parser_template_id (parser,
3903 /*template_keyword_p=*/false,
3904 /*check_dependency_p=*/true,
3906 /* If that worked, we're done. */
3907 if (cp_parser_parse_definitely (parser))
3910 /* Peek at the next token. (Changes in the token buffer may
3911 have invalidated the pointer obtained above.) */
3912 token = cp_lexer_peek_token (parser->lexer);
3914 switch (token->type)
3917 return cp_parser_identifier (parser);
3920 if (token->keyword == RID_OPERATOR)
3921 return cp_parser_operator_function_id (parser);
3925 cp_parser_error (parser, "expected id-expression");
3926 return error_mark_node;
3930 return cp_parser_unqualified_id (parser, template_keyword_p,
3931 /*check_dependency_p=*/true,
3936 /* Parse an unqualified-id.
3940 operator-function-id
3941 conversion-function-id
3945 If TEMPLATE_KEYWORD_P is TRUE, we have just seen the `template'
3946 keyword, in a construct like `A::template ...'.
3948 Returns a representation of unqualified-id. For the `identifier'
3949 production, an IDENTIFIER_NODE is returned. For the `~ class-name'
3950 production a BIT_NOT_EXPR is returned; the operand of the
3951 BIT_NOT_EXPR is an IDENTIFIER_NODE for the class-name. For the
3952 other productions, see the documentation accompanying the
3953 corresponding parsing functions. If CHECK_DEPENDENCY_P is false,
3954 names are looked up in uninstantiated templates. If DECLARATOR_P
3955 is true, the unqualified-id is appearing as part of a declarator,
3956 rather than as part of an expression. */
3959 cp_parser_unqualified_id (cp_parser* parser,
3960 bool template_keyword_p,
3961 bool check_dependency_p,
3967 /* Peek at the next token. */
3968 token = cp_lexer_peek_token (parser->lexer);
3970 switch (token->type)
3976 /* We don't know yet whether or not this will be a
3978 cp_parser_parse_tentatively (parser);
3979 /* Try a template-id. */
3980 id = cp_parser_template_id (parser, template_keyword_p,
3983 /* If it worked, we're done. */
3984 if (cp_parser_parse_definitely (parser))
3986 /* Otherwise, it's an ordinary identifier. */
3987 return cp_parser_identifier (parser);
3990 case CPP_TEMPLATE_ID:
3991 return cp_parser_template_id (parser, template_keyword_p,
3998 tree qualifying_scope;
4003 /* Consume the `~' token. */
4004 cp_lexer_consume_token (parser->lexer);
4005 /* Parse the class-name. The standard, as written, seems to
4008 template <typename T> struct S { ~S (); };
4009 template <typename T> S<T>::~S() {}
4011 is invalid, since `~' must be followed by a class-name, but
4012 `S<T>' is dependent, and so not known to be a class.
4013 That's not right; we need to look in uninstantiated
4014 templates. A further complication arises from:
4016 template <typename T> void f(T t) {
4020 Here, it is not possible to look up `T' in the scope of `T'
4021 itself. We must look in both the current scope, and the
4022 scope of the containing complete expression.
4024 Yet another issue is:
4033 The standard does not seem to say that the `S' in `~S'
4034 should refer to the type `S' and not the data member
4037 /* DR 244 says that we look up the name after the "~" in the
4038 same scope as we looked up the qualifying name. That idea
4039 isn't fully worked out; it's more complicated than that. */
4040 scope = parser->scope;
4041 object_scope = parser->object_scope;
4042 qualifying_scope = parser->qualifying_scope;
4044 /* Check for invalid scopes. */
4045 if (scope == error_mark_node)
4047 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
4048 cp_lexer_consume_token (parser->lexer);
4049 return error_mark_node;
4051 if (scope && TREE_CODE (scope) == NAMESPACE_DECL)
4053 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
4054 error_at (token->location,
4055 "scope %qT before %<~%> is not a class-name",
4057 cp_parser_simulate_error (parser);
4058 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
4059 cp_lexer_consume_token (parser->lexer);
4060 return error_mark_node;
4062 gcc_assert (!scope || TYPE_P (scope));
4064 /* If the name is of the form "X::~X" it's OK even if X is a
4066 token = cp_lexer_peek_token (parser->lexer);
4068 && token->type == CPP_NAME
4069 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
4071 && (token->u.value == TYPE_IDENTIFIER (scope)
4072 || (CLASS_TYPE_P (scope)
4073 && constructor_name_p (token->u.value, scope))))
4075 cp_lexer_consume_token (parser->lexer);
4076 return build_nt (BIT_NOT_EXPR, scope);
4079 /* If there was an explicit qualification (S::~T), first look
4080 in the scope given by the qualification (i.e., S).
4082 Note: in the calls to cp_parser_class_name below we pass
4083 typename_type so that lookup finds the injected-class-name
4084 rather than the constructor. */
4086 type_decl = NULL_TREE;
4089 cp_parser_parse_tentatively (parser);
4090 type_decl = cp_parser_class_name (parser,
4091 /*typename_keyword_p=*/false,
4092 /*template_keyword_p=*/false,
4094 /*check_dependency=*/false,
4095 /*class_head_p=*/false,
4097 if (cp_parser_parse_definitely (parser))
4100 /* In "N::S::~S", look in "N" as well. */
4101 if (!done && scope && qualifying_scope)
4103 cp_parser_parse_tentatively (parser);
4104 parser->scope = qualifying_scope;
4105 parser->object_scope = NULL_TREE;
4106 parser->qualifying_scope = NULL_TREE;
4108 = cp_parser_class_name (parser,
4109 /*typename_keyword_p=*/false,
4110 /*template_keyword_p=*/false,
4112 /*check_dependency=*/false,
4113 /*class_head_p=*/false,
4115 if (cp_parser_parse_definitely (parser))
4118 /* In "p->S::~T", look in the scope given by "*p" as well. */
4119 else if (!done && object_scope)
4121 cp_parser_parse_tentatively (parser);
4122 parser->scope = object_scope;
4123 parser->object_scope = NULL_TREE;
4124 parser->qualifying_scope = NULL_TREE;
4126 = cp_parser_class_name (parser,
4127 /*typename_keyword_p=*/false,
4128 /*template_keyword_p=*/false,
4130 /*check_dependency=*/false,
4131 /*class_head_p=*/false,
4133 if (cp_parser_parse_definitely (parser))
4136 /* Look in the surrounding context. */
4139 parser->scope = NULL_TREE;
4140 parser->object_scope = NULL_TREE;
4141 parser->qualifying_scope = NULL_TREE;
4142 if (processing_template_decl)
4143 cp_parser_parse_tentatively (parser);
4145 = cp_parser_class_name (parser,
4146 /*typename_keyword_p=*/false,
4147 /*template_keyword_p=*/false,
4149 /*check_dependency=*/false,
4150 /*class_head_p=*/false,
4152 if (processing_template_decl
4153 && ! cp_parser_parse_definitely (parser))
4155 /* We couldn't find a type with this name, so just accept
4156 it and check for a match at instantiation time. */
4157 type_decl = cp_parser_identifier (parser);
4158 if (type_decl != error_mark_node)
4159 type_decl = build_nt (BIT_NOT_EXPR, type_decl);
4163 /* If an error occurred, assume that the name of the
4164 destructor is the same as the name of the qualifying
4165 class. That allows us to keep parsing after running
4166 into ill-formed destructor names. */
4167 if (type_decl == error_mark_node && scope)
4168 return build_nt (BIT_NOT_EXPR, scope);
4169 else if (type_decl == error_mark_node)
4170 return error_mark_node;
4172 /* Check that destructor name and scope match. */
4173 if (declarator_p && scope && !check_dtor_name (scope, type_decl))
4175 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
4176 error_at (token->location,
4177 "declaration of %<~%T%> as member of %qT",
4179 cp_parser_simulate_error (parser);
4180 return error_mark_node;
4185 A typedef-name that names a class shall not be used as the
4186 identifier in the declarator for a destructor declaration. */
4188 && !DECL_IMPLICIT_TYPEDEF_P (type_decl)
4189 && !DECL_SELF_REFERENCE_P (type_decl)
4190 && !cp_parser_uncommitted_to_tentative_parse_p (parser))
4191 error_at (token->location,
4192 "typedef-name %qD used as destructor declarator",
4195 return build_nt (BIT_NOT_EXPR, TREE_TYPE (type_decl));
4199 if (token->keyword == RID_OPERATOR)
4203 /* This could be a template-id, so we try that first. */
4204 cp_parser_parse_tentatively (parser);
4205 /* Try a template-id. */
4206 id = cp_parser_template_id (parser, template_keyword_p,
4207 /*check_dependency_p=*/true,
4209 /* If that worked, we're done. */
4210 if (cp_parser_parse_definitely (parser))
4212 /* We still don't know whether we're looking at an
4213 operator-function-id or a conversion-function-id. */
4214 cp_parser_parse_tentatively (parser);
4215 /* Try an operator-function-id. */
4216 id = cp_parser_operator_function_id (parser);
4217 /* If that didn't work, try a conversion-function-id. */
4218 if (!cp_parser_parse_definitely (parser))
4219 id = cp_parser_conversion_function_id (parser);
4228 cp_parser_error (parser, "expected unqualified-id");
4229 return error_mark_node;
4233 /* Parse an (optional) nested-name-specifier.
4235 nested-name-specifier: [C++98]
4236 class-or-namespace-name :: nested-name-specifier [opt]
4237 class-or-namespace-name :: template nested-name-specifier [opt]
4239 nested-name-specifier: [C++0x]
4242 nested-name-specifier identifier ::
4243 nested-name-specifier template [opt] simple-template-id ::
4245 PARSER->SCOPE should be set appropriately before this function is
4246 called. TYPENAME_KEYWORD_P is TRUE if the `typename' keyword is in
4247 effect. TYPE_P is TRUE if we non-type bindings should be ignored
4250 Sets PARSER->SCOPE to the class (TYPE) or namespace
4251 (NAMESPACE_DECL) specified by the nested-name-specifier, or leaves
4252 it unchanged if there is no nested-name-specifier. Returns the new
4253 scope iff there is a nested-name-specifier, or NULL_TREE otherwise.
4255 If IS_DECLARATION is TRUE, the nested-name-specifier is known to be
4256 part of a declaration and/or decl-specifier. */
4259 cp_parser_nested_name_specifier_opt (cp_parser *parser,
4260 bool typename_keyword_p,
4261 bool check_dependency_p,
4263 bool is_declaration)
4265 bool success = false;
4266 cp_token_position start = 0;
4269 /* Remember where the nested-name-specifier starts. */
4270 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
4272 start = cp_lexer_token_position (parser->lexer, false);
4273 push_deferring_access_checks (dk_deferred);
4280 tree saved_qualifying_scope;
4281 bool template_keyword_p;
4283 /* Spot cases that cannot be the beginning of a
4284 nested-name-specifier. */
4285 token = cp_lexer_peek_token (parser->lexer);
4287 /* If the next token is CPP_NESTED_NAME_SPECIFIER, just process
4288 the already parsed nested-name-specifier. */
4289 if (token->type == CPP_NESTED_NAME_SPECIFIER)
4291 /* Grab the nested-name-specifier and continue the loop. */
4292 cp_parser_pre_parsed_nested_name_specifier (parser);
4293 /* If we originally encountered this nested-name-specifier
4294 with IS_DECLARATION set to false, we will not have
4295 resolved TYPENAME_TYPEs, so we must do so here. */
4297 && TREE_CODE (parser->scope) == TYPENAME_TYPE)
4299 new_scope = resolve_typename_type (parser->scope,
4300 /*only_current_p=*/false);
4301 if (TREE_CODE (new_scope) != TYPENAME_TYPE)
4302 parser->scope = new_scope;
4308 /* Spot cases that cannot be the beginning of a
4309 nested-name-specifier. On the second and subsequent times
4310 through the loop, we look for the `template' keyword. */
4311 if (success && token->keyword == RID_TEMPLATE)
4313 /* A template-id can start a nested-name-specifier. */
4314 else if (token->type == CPP_TEMPLATE_ID)
4318 /* If the next token is not an identifier, then it is
4319 definitely not a type-name or namespace-name. */
4320 if (token->type != CPP_NAME)
4322 /* If the following token is neither a `<' (to begin a
4323 template-id), nor a `::', then we are not looking at a
4324 nested-name-specifier. */
4325 token = cp_lexer_peek_nth_token (parser->lexer, 2);
4327 if (token->type == CPP_COLON
4328 && parser->colon_corrects_to_scope_p
4329 && cp_lexer_peek_nth_token (parser->lexer, 3)->type == CPP_NAME)
4331 error_at (token->location,
4332 "found %<:%> in nested-name-specifier, expected %<::%>");
4333 token->type = CPP_SCOPE;
4336 if (token->type != CPP_SCOPE
4337 && !cp_parser_nth_token_starts_template_argument_list_p
4342 /* The nested-name-specifier is optional, so we parse
4344 cp_parser_parse_tentatively (parser);
4346 /* Look for the optional `template' keyword, if this isn't the
4347 first time through the loop. */
4349 template_keyword_p = cp_parser_optional_template_keyword (parser);
4351 template_keyword_p = false;
4353 /* Save the old scope since the name lookup we are about to do
4354 might destroy it. */
4355 old_scope = parser->scope;
4356 saved_qualifying_scope = parser->qualifying_scope;
4357 /* In a declarator-id like "X<T>::I::Y<T>" we must be able to
4358 look up names in "X<T>::I" in order to determine that "Y" is
4359 a template. So, if we have a typename at this point, we make
4360 an effort to look through it. */
4362 && !typename_keyword_p
4364 && TREE_CODE (parser->scope) == TYPENAME_TYPE)
4365 parser->scope = resolve_typename_type (parser->scope,
4366 /*only_current_p=*/false);
4367 /* Parse the qualifying entity. */
4369 = cp_parser_qualifying_entity (parser,
4375 /* Look for the `::' token. */
4376 cp_parser_require (parser, CPP_SCOPE, RT_SCOPE);
4378 /* If we found what we wanted, we keep going; otherwise, we're
4380 if (!cp_parser_parse_definitely (parser))
4382 bool error_p = false;
4384 /* Restore the OLD_SCOPE since it was valid before the
4385 failed attempt at finding the last
4386 class-or-namespace-name. */
4387 parser->scope = old_scope;
4388 parser->qualifying_scope = saved_qualifying_scope;
4389 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
4391 /* If the next token is an identifier, and the one after
4392 that is a `::', then any valid interpretation would have
4393 found a class-or-namespace-name. */
4394 while (cp_lexer_next_token_is (parser->lexer, CPP_NAME)
4395 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
4397 && (cp_lexer_peek_nth_token (parser->lexer, 3)->type
4400 token = cp_lexer_consume_token (parser->lexer);
4403 if (!token->ambiguous_p)
4406 tree ambiguous_decls;
4408 decl = cp_parser_lookup_name (parser, token->u.value,
4410 /*is_template=*/false,
4411 /*is_namespace=*/false,
4412 /*check_dependency=*/true,
4415 if (TREE_CODE (decl) == TEMPLATE_DECL)
4416 error_at (token->location,
4417 "%qD used without template parameters",
4419 else if (ambiguous_decls)
4421 error_at (token->location,
4422 "reference to %qD is ambiguous",
4424 print_candidates (ambiguous_decls);
4425 decl = error_mark_node;
4429 if (cxx_dialect != cxx98)
4430 cp_parser_name_lookup_error
4431 (parser, token->u.value, decl, NLE_NOT_CXX98,
4434 cp_parser_name_lookup_error
4435 (parser, token->u.value, decl, NLE_CXX98,
4439 parser->scope = error_mark_node;
4441 /* Treat this as a successful nested-name-specifier
4446 If the name found is not a class-name (clause
4447 _class_) or namespace-name (_namespace.def_), the
4448 program is ill-formed. */
4451 cp_lexer_consume_token (parser->lexer);
4455 /* We've found one valid nested-name-specifier. */
4457 /* Name lookup always gives us a DECL. */
4458 if (TREE_CODE (new_scope) == TYPE_DECL)
4459 new_scope = TREE_TYPE (new_scope);
4460 /* Uses of "template" must be followed by actual templates. */
4461 if (template_keyword_p
4462 && !(CLASS_TYPE_P (new_scope)
4463 && ((CLASSTYPE_USE_TEMPLATE (new_scope)
4464 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (new_scope)))
4465 || CLASSTYPE_IS_TEMPLATE (new_scope)))
4466 && !(TREE_CODE (new_scope) == TYPENAME_TYPE
4467 && (TREE_CODE (TYPENAME_TYPE_FULLNAME (new_scope))
4468 == TEMPLATE_ID_EXPR)))
4469 permerror (input_location, TYPE_P (new_scope)
4470 ? "%qT is not a template"
4471 : "%qD is not a template",
4473 /* If it is a class scope, try to complete it; we are about to
4474 be looking up names inside the class. */
4475 if (TYPE_P (new_scope)
4476 /* Since checking types for dependency can be expensive,
4477 avoid doing it if the type is already complete. */
4478 && !COMPLETE_TYPE_P (new_scope)
4479 /* Do not try to complete dependent types. */
4480 && !dependent_type_p (new_scope))
4482 new_scope = complete_type (new_scope);
4483 /* If it is a typedef to current class, use the current
4484 class instead, as the typedef won't have any names inside
4486 if (!COMPLETE_TYPE_P (new_scope)
4487 && currently_open_class (new_scope))
4488 new_scope = TYPE_MAIN_VARIANT (new_scope);
4490 /* Make sure we look in the right scope the next time through
4492 parser->scope = new_scope;
4495 /* If parsing tentatively, replace the sequence of tokens that makes
4496 up the nested-name-specifier with a CPP_NESTED_NAME_SPECIFIER
4497 token. That way, should we re-parse the token stream, we will
4498 not have to repeat the effort required to do the parse, nor will
4499 we issue duplicate error messages. */
4500 if (success && start)
4504 token = cp_lexer_token_at (parser->lexer, start);
4505 /* Reset the contents of the START token. */
4506 token->type = CPP_NESTED_NAME_SPECIFIER;
4507 /* Retrieve any deferred checks. Do not pop this access checks yet
4508 so the memory will not be reclaimed during token replacing below. */
4509 token->u.tree_check_value = ggc_alloc_cleared_tree_check ();
4510 token->u.tree_check_value->value = parser->scope;
4511 token->u.tree_check_value->checks = get_deferred_access_checks ();
4512 token->u.tree_check_value->qualifying_scope =
4513 parser->qualifying_scope;
4514 token->keyword = RID_MAX;
4516 /* Purge all subsequent tokens. */
4517 cp_lexer_purge_tokens_after (parser->lexer, start);
4521 pop_to_parent_deferring_access_checks ();
4523 return success ? parser->scope : NULL_TREE;
4526 /* Parse a nested-name-specifier. See
4527 cp_parser_nested_name_specifier_opt for details. This function
4528 behaves identically, except that it will an issue an error if no
4529 nested-name-specifier is present. */
4532 cp_parser_nested_name_specifier (cp_parser *parser,
4533 bool typename_keyword_p,
4534 bool check_dependency_p,
4536 bool is_declaration)
4540 /* Look for the nested-name-specifier. */
4541 scope = cp_parser_nested_name_specifier_opt (parser,
4546 /* If it was not present, issue an error message. */
4549 cp_parser_error (parser, "expected nested-name-specifier");
4550 parser->scope = NULL_TREE;
4556 /* Parse the qualifying entity in a nested-name-specifier. For C++98,
4557 this is either a class-name or a namespace-name (which corresponds
4558 to the class-or-namespace-name production in the grammar). For
4559 C++0x, it can also be a type-name that refers to an enumeration
4562 TYPENAME_KEYWORD_P is TRUE iff the `typename' keyword is in effect.
4563 TEMPLATE_KEYWORD_P is TRUE iff the `template' keyword is in effect.
4564 CHECK_DEPENDENCY_P is FALSE iff dependent names should be looked up.
4565 TYPE_P is TRUE iff the next name should be taken as a class-name,
4566 even the same name is declared to be another entity in the same
4569 Returns the class (TYPE_DECL) or namespace (NAMESPACE_DECL)
4570 specified by the class-or-namespace-name. If neither is found the
4571 ERROR_MARK_NODE is returned. */
4574 cp_parser_qualifying_entity (cp_parser *parser,
4575 bool typename_keyword_p,
4576 bool template_keyword_p,
4577 bool check_dependency_p,
4579 bool is_declaration)
4582 tree saved_qualifying_scope;
4583 tree saved_object_scope;
4586 bool successful_parse_p;
4588 /* Before we try to parse the class-name, we must save away the
4589 current PARSER->SCOPE since cp_parser_class_name will destroy
4591 saved_scope = parser->scope;
4592 saved_qualifying_scope = parser->qualifying_scope;
4593 saved_object_scope = parser->object_scope;
4594 /* Try for a class-name first. If the SAVED_SCOPE is a type, then
4595 there is no need to look for a namespace-name. */
4596 only_class_p = template_keyword_p
4597 || (saved_scope && TYPE_P (saved_scope) && cxx_dialect == cxx98);
4599 cp_parser_parse_tentatively (parser);
4600 scope = cp_parser_class_name (parser,
4603 type_p ? class_type : none_type,
4605 /*class_head_p=*/false,
4607 successful_parse_p = only_class_p || cp_parser_parse_definitely (parser);
4608 /* If that didn't work and we're in C++0x mode, try for a type-name. */
4610 && cxx_dialect != cxx98
4611 && !successful_parse_p)
4613 /* Restore the saved scope. */
4614 parser->scope = saved_scope;
4615 parser->qualifying_scope = saved_qualifying_scope;
4616 parser->object_scope = saved_object_scope;
4618 /* Parse tentatively. */
4619 cp_parser_parse_tentatively (parser);
4621 /* Parse a typedef-name or enum-name. */
4622 scope = cp_parser_nonclass_name (parser);
4624 /* "If the name found does not designate a namespace or a class,
4625 enumeration, or dependent type, the program is ill-formed."
4627 We cover classes and dependent types above and namespaces below,
4628 so this code is only looking for enums. */
4629 if (!scope || TREE_CODE (scope) != TYPE_DECL
4630 || TREE_CODE (TREE_TYPE (scope)) != ENUMERAL_TYPE)
4631 cp_parser_simulate_error (parser);
4633 successful_parse_p = cp_parser_parse_definitely (parser);
4635 /* If that didn't work, try for a namespace-name. */
4636 if (!only_class_p && !successful_parse_p)
4638 /* Restore the saved scope. */
4639 parser->scope = saved_scope;
4640 parser->qualifying_scope = saved_qualifying_scope;
4641 parser->object_scope = saved_object_scope;
4642 /* If we are not looking at an identifier followed by the scope
4643 resolution operator, then this is not part of a
4644 nested-name-specifier. (Note that this function is only used
4645 to parse the components of a nested-name-specifier.) */
4646 if (cp_lexer_next_token_is_not (parser->lexer, CPP_NAME)
4647 || cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_SCOPE)
4648 return error_mark_node;
4649 scope = cp_parser_namespace_name (parser);
4655 /* Parse a postfix-expression.
4659 postfix-expression [ expression ]
4660 postfix-expression ( expression-list [opt] )
4661 simple-type-specifier ( expression-list [opt] )
4662 typename :: [opt] nested-name-specifier identifier
4663 ( expression-list [opt] )
4664 typename :: [opt] nested-name-specifier template [opt] template-id
4665 ( expression-list [opt] )
4666 postfix-expression . template [opt] id-expression
4667 postfix-expression -> template [opt] id-expression
4668 postfix-expression . pseudo-destructor-name
4669 postfix-expression -> pseudo-destructor-name
4670 postfix-expression ++
4671 postfix-expression --
4672 dynamic_cast < type-id > ( expression )
4673 static_cast < type-id > ( expression )
4674 reinterpret_cast < type-id > ( expression )
4675 const_cast < type-id > ( expression )
4676 typeid ( expression )
4682 ( type-id ) { initializer-list , [opt] }
4684 This extension is a GNU version of the C99 compound-literal
4685 construct. (The C99 grammar uses `type-name' instead of `type-id',
4686 but they are essentially the same concept.)
4688 If ADDRESS_P is true, the postfix expression is the operand of the
4689 `&' operator. CAST_P is true if this expression is the target of a
4692 If MEMBER_ACCESS_ONLY_P, we only allow postfix expressions that are
4693 class member access expressions [expr.ref].
4695 Returns a representation of the expression. */
4698 cp_parser_postfix_expression (cp_parser *parser, bool address_p, bool cast_p,
4699 bool member_access_only_p,
4700 cp_id_kind * pidk_return)
4704 cp_id_kind idk = CP_ID_KIND_NONE;
4705 tree postfix_expression = NULL_TREE;
4706 bool is_member_access = false;
4708 /* Peek at the next token. */
4709 token = cp_lexer_peek_token (parser->lexer);
4710 /* Some of the productions are determined by keywords. */
4711 keyword = token->keyword;
4721 const char *saved_message;
4723 /* All of these can be handled in the same way from the point
4724 of view of parsing. Begin by consuming the token
4725 identifying the cast. */
4726 cp_lexer_consume_token (parser->lexer);
4728 /* New types cannot be defined in the cast. */
4729 saved_message = parser->type_definition_forbidden_message;
4730 parser->type_definition_forbidden_message
4731 = G_("types may not be defined in casts");
4733 /* Look for the opening `<'. */
4734 cp_parser_require (parser, CPP_LESS, RT_LESS);
4735 /* Parse the type to which we are casting. */
4736 type = cp_parser_type_id (parser);
4737 /* Look for the closing `>'. */
4738 cp_parser_require (parser, CPP_GREATER, RT_GREATER);
4739 /* Restore the old message. */
4740 parser->type_definition_forbidden_message = saved_message;
4742 /* And the expression which is being cast. */
4743 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
4744 expression = cp_parser_expression (parser, /*cast_p=*/true, & idk);
4745 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
4747 /* Only type conversions to integral or enumeration types
4748 can be used in constant-expressions. */
4749 if (!cast_valid_in_integral_constant_expression_p (type)
4750 && cp_parser_non_integral_constant_expression (parser, NIC_CAST))
4751 return error_mark_node;
4757 = build_dynamic_cast (type, expression, tf_warning_or_error);
4761 = build_static_cast (type, expression, tf_warning_or_error);
4765 = build_reinterpret_cast (type, expression,
4766 tf_warning_or_error);
4770 = build_const_cast (type, expression, tf_warning_or_error);
4781 const char *saved_message;
4782 bool saved_in_type_id_in_expr_p;
4784 /* Consume the `typeid' token. */
4785 cp_lexer_consume_token (parser->lexer);
4786 /* Look for the `(' token. */
4787 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
4788 /* Types cannot be defined in a `typeid' expression. */
4789 saved_message = parser->type_definition_forbidden_message;
4790 parser->type_definition_forbidden_message
4791 = G_("types may not be defined in a %<typeid%> expression");
4792 /* We can't be sure yet whether we're looking at a type-id or an
4794 cp_parser_parse_tentatively (parser);
4795 /* Try a type-id first. */
4796 saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
4797 parser->in_type_id_in_expr_p = true;
4798 type = cp_parser_type_id (parser);
4799 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
4800 /* Look for the `)' token. Otherwise, we can't be sure that
4801 we're not looking at an expression: consider `typeid (int
4802 (3))', for example. */
4803 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
4804 /* If all went well, simply lookup the type-id. */
4805 if (cp_parser_parse_definitely (parser))
4806 postfix_expression = get_typeid (type);
4807 /* Otherwise, fall back to the expression variant. */
4812 /* Look for an expression. */
4813 expression = cp_parser_expression (parser, /*cast_p=*/false, & idk);
4814 /* Compute its typeid. */
4815 postfix_expression = build_typeid (expression);
4816 /* Look for the `)' token. */
4817 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
4819 /* Restore the saved message. */
4820 parser->type_definition_forbidden_message = saved_message;
4821 /* `typeid' may not appear in an integral constant expression. */
4822 if (cp_parser_non_integral_constant_expression(parser, NIC_TYPEID))
4823 return error_mark_node;
4830 /* The syntax permitted here is the same permitted for an
4831 elaborated-type-specifier. */
4832 type = cp_parser_elaborated_type_specifier (parser,
4833 /*is_friend=*/false,
4834 /*is_declaration=*/false);
4835 postfix_expression = cp_parser_functional_cast (parser, type);
4843 /* If the next thing is a simple-type-specifier, we may be
4844 looking at a functional cast. We could also be looking at
4845 an id-expression. So, we try the functional cast, and if
4846 that doesn't work we fall back to the primary-expression. */
4847 cp_parser_parse_tentatively (parser);
4848 /* Look for the simple-type-specifier. */
4849 type = cp_parser_simple_type_specifier (parser,
4850 /*decl_specs=*/NULL,
4851 CP_PARSER_FLAGS_NONE);
4852 /* Parse the cast itself. */
4853 if (!cp_parser_error_occurred (parser))
4855 = cp_parser_functional_cast (parser, type);
4856 /* If that worked, we're done. */
4857 if (cp_parser_parse_definitely (parser))
4860 /* If the functional-cast didn't work out, try a
4861 compound-literal. */
4862 if (cp_parser_allow_gnu_extensions_p (parser)
4863 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
4865 VEC(constructor_elt,gc) *initializer_list = NULL;
4866 bool saved_in_type_id_in_expr_p;
4868 cp_parser_parse_tentatively (parser);
4869 /* Consume the `('. */
4870 cp_lexer_consume_token (parser->lexer);
4871 /* Parse the type. */
4872 saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
4873 parser->in_type_id_in_expr_p = true;
4874 type = cp_parser_type_id (parser);
4875 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
4876 /* Look for the `)'. */
4877 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
4878 /* Look for the `{'. */
4879 cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE);
4880 /* If things aren't going well, there's no need to
4882 if (!cp_parser_error_occurred (parser))
4884 bool non_constant_p;
4885 /* Parse the initializer-list. */
4887 = cp_parser_initializer_list (parser, &non_constant_p);
4888 /* Allow a trailing `,'. */
4889 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
4890 cp_lexer_consume_token (parser->lexer);
4891 /* Look for the final `}'. */
4892 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
4894 /* If that worked, we're definitely looking at a
4895 compound-literal expression. */
4896 if (cp_parser_parse_definitely (parser))
4898 /* Warn the user that a compound literal is not
4899 allowed in standard C++. */
4900 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids compound-literals");
4901 /* For simplicity, we disallow compound literals in
4902 constant-expressions. We could
4903 allow compound literals of integer type, whose
4904 initializer was a constant, in constant
4905 expressions. Permitting that usage, as a further
4906 extension, would not change the meaning of any
4907 currently accepted programs. (Of course, as
4908 compound literals are not part of ISO C++, the
4909 standard has nothing to say.) */
4910 if (cp_parser_non_integral_constant_expression (parser,
4913 postfix_expression = error_mark_node;
4916 /* Form the representation of the compound-literal. */
4918 = (finish_compound_literal
4919 (type, build_constructor (init_list_type_node,
4921 tf_warning_or_error));
4926 /* It must be a primary-expression. */
4928 = cp_parser_primary_expression (parser, address_p, cast_p,
4929 /*template_arg_p=*/false,
4935 /* Keep looping until the postfix-expression is complete. */
4938 if (idk == CP_ID_KIND_UNQUALIFIED
4939 && TREE_CODE (postfix_expression) == IDENTIFIER_NODE
4940 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_PAREN))
4941 /* It is not a Koenig lookup function call. */
4943 = unqualified_name_lookup_error (postfix_expression);
4945 /* Peek at the next token. */
4946 token = cp_lexer_peek_token (parser->lexer);
4948 switch (token->type)
4950 case CPP_OPEN_SQUARE:
4952 = cp_parser_postfix_open_square_expression (parser,
4955 idk = CP_ID_KIND_NONE;
4956 is_member_access = false;
4959 case CPP_OPEN_PAREN:
4960 /* postfix-expression ( expression-list [opt] ) */
4963 bool is_builtin_constant_p;
4964 bool saved_integral_constant_expression_p = false;
4965 bool saved_non_integral_constant_expression_p = false;
4968 is_member_access = false;
4970 is_builtin_constant_p
4971 = DECL_IS_BUILTIN_CONSTANT_P (postfix_expression);
4972 if (is_builtin_constant_p)
4974 /* The whole point of __builtin_constant_p is to allow
4975 non-constant expressions to appear as arguments. */
4976 saved_integral_constant_expression_p
4977 = parser->integral_constant_expression_p;
4978 saved_non_integral_constant_expression_p
4979 = parser->non_integral_constant_expression_p;
4980 parser->integral_constant_expression_p = false;
4982 args = (cp_parser_parenthesized_expression_list
4984 /*cast_p=*/false, /*allow_expansion_p=*/true,
4985 /*non_constant_p=*/NULL));
4986 if (is_builtin_constant_p)
4988 parser->integral_constant_expression_p
4989 = saved_integral_constant_expression_p;
4990 parser->non_integral_constant_expression_p
4991 = saved_non_integral_constant_expression_p;
4996 postfix_expression = error_mark_node;
5000 /* Function calls are not permitted in
5001 constant-expressions. */
5002 if (! builtin_valid_in_constant_expr_p (postfix_expression)
5003 && cp_parser_non_integral_constant_expression (parser,
5006 postfix_expression = error_mark_node;
5007 release_tree_vector (args);
5012 if (idk == CP_ID_KIND_UNQUALIFIED
5013 || idk == CP_ID_KIND_TEMPLATE_ID)
5015 if (TREE_CODE (postfix_expression) == IDENTIFIER_NODE)
5017 if (!VEC_empty (tree, args))
5020 if (!any_type_dependent_arguments_p (args))
5022 = perform_koenig_lookup (postfix_expression, args,
5023 /*include_std=*/false,
5024 tf_warning_or_error);
5028 = unqualified_fn_lookup_error (postfix_expression);
5030 /* We do not perform argument-dependent lookup if
5031 normal lookup finds a non-function, in accordance
5032 with the expected resolution of DR 218. */
5033 else if (!VEC_empty (tree, args)
5034 && is_overloaded_fn (postfix_expression))
5036 tree fn = get_first_fn (postfix_expression);
5037 fn = STRIP_TEMPLATE (fn);
5039 /* Do not do argument dependent lookup if regular
5040 lookup finds a member function or a block-scope
5041 function declaration. [basic.lookup.argdep]/3 */
5042 if (!DECL_FUNCTION_MEMBER_P (fn)
5043 && !DECL_LOCAL_FUNCTION_P (fn))
5046 if (!any_type_dependent_arguments_p (args))
5048 = perform_koenig_lookup (postfix_expression, args,
5049 /*include_std=*/false,
5050 tf_warning_or_error);
5055 if (TREE_CODE (postfix_expression) == COMPONENT_REF)
5057 tree instance = TREE_OPERAND (postfix_expression, 0);
5058 tree fn = TREE_OPERAND (postfix_expression, 1);
5060 if (processing_template_decl
5061 && (type_dependent_expression_p (instance)
5062 || (!BASELINK_P (fn)
5063 && TREE_CODE (fn) != FIELD_DECL)
5064 || type_dependent_expression_p (fn)
5065 || any_type_dependent_arguments_p (args)))
5068 = build_nt_call_vec (postfix_expression, args);
5069 release_tree_vector (args);
5073 if (BASELINK_P (fn))
5076 = (build_new_method_call
5077 (instance, fn, &args, NULL_TREE,
5078 (idk == CP_ID_KIND_QUALIFIED
5079 ? LOOKUP_NORMAL|LOOKUP_NONVIRTUAL
5082 tf_warning_or_error));
5086 = finish_call_expr (postfix_expression, &args,
5087 /*disallow_virtual=*/false,
5089 tf_warning_or_error);
5091 else if (TREE_CODE (postfix_expression) == OFFSET_REF
5092 || TREE_CODE (postfix_expression) == MEMBER_REF
5093 || TREE_CODE (postfix_expression) == DOTSTAR_EXPR)
5094 postfix_expression = (build_offset_ref_call_from_tree
5095 (postfix_expression, &args));
5096 else if (idk == CP_ID_KIND_QUALIFIED)
5097 /* A call to a static class member, or a namespace-scope
5100 = finish_call_expr (postfix_expression, &args,
5101 /*disallow_virtual=*/true,
5103 tf_warning_or_error);
5105 /* All other function calls. */
5107 = finish_call_expr (postfix_expression, &args,
5108 /*disallow_virtual=*/false,
5110 tf_warning_or_error);
5112 /* The POSTFIX_EXPRESSION is certainly no longer an id. */
5113 idk = CP_ID_KIND_NONE;
5115 release_tree_vector (args);
5121 /* postfix-expression . template [opt] id-expression
5122 postfix-expression . pseudo-destructor-name
5123 postfix-expression -> template [opt] id-expression
5124 postfix-expression -> pseudo-destructor-name */
5126 /* Consume the `.' or `->' operator. */
5127 cp_lexer_consume_token (parser->lexer);
5130 = cp_parser_postfix_dot_deref_expression (parser, token->type,
5135 is_member_access = true;
5139 /* postfix-expression ++ */
5140 /* Consume the `++' token. */
5141 cp_lexer_consume_token (parser->lexer);
5142 /* Generate a representation for the complete expression. */
5144 = finish_increment_expr (postfix_expression,
5145 POSTINCREMENT_EXPR);
5146 /* Increments may not appear in constant-expressions. */
5147 if (cp_parser_non_integral_constant_expression (parser, NIC_INC))
5148 postfix_expression = error_mark_node;
5149 idk = CP_ID_KIND_NONE;
5150 is_member_access = false;
5153 case CPP_MINUS_MINUS:
5154 /* postfix-expression -- */
5155 /* Consume the `--' token. */
5156 cp_lexer_consume_token (parser->lexer);
5157 /* Generate a representation for the complete expression. */
5159 = finish_increment_expr (postfix_expression,
5160 POSTDECREMENT_EXPR);
5161 /* Decrements may not appear in constant-expressions. */
5162 if (cp_parser_non_integral_constant_expression (parser, NIC_DEC))
5163 postfix_expression = error_mark_node;
5164 idk = CP_ID_KIND_NONE;
5165 is_member_access = false;
5169 if (pidk_return != NULL)
5170 * pidk_return = idk;
5171 if (member_access_only_p)
5172 return is_member_access? postfix_expression : error_mark_node;
5174 return postfix_expression;
5178 /* We should never get here. */
5180 return error_mark_node;
5183 /* A subroutine of cp_parser_postfix_expression that also gets hijacked
5184 by cp_parser_builtin_offsetof. We're looking for
5186 postfix-expression [ expression ]
5188 FOR_OFFSETOF is set if we're being called in that context, which
5189 changes how we deal with integer constant expressions. */
5192 cp_parser_postfix_open_square_expression (cp_parser *parser,
5193 tree postfix_expression,
5198 /* Consume the `[' token. */
5199 cp_lexer_consume_token (parser->lexer);
5201 /* Parse the index expression. */
5202 /* ??? For offsetof, there is a question of what to allow here. If
5203 offsetof is not being used in an integral constant expression context,
5204 then we *could* get the right answer by computing the value at runtime.
5205 If we are in an integral constant expression context, then we might
5206 could accept any constant expression; hard to say without analysis.
5207 Rather than open the barn door too wide right away, allow only integer
5208 constant expressions here. */
5210 index = cp_parser_constant_expression (parser, false, NULL);
5212 index = cp_parser_expression (parser, /*cast_p=*/false, NULL);
5214 /* Look for the closing `]'. */
5215 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
5217 /* Build the ARRAY_REF. */
5218 postfix_expression = grok_array_decl (postfix_expression, index);
5220 /* When not doing offsetof, array references are not permitted in
5221 constant-expressions. */
5223 && (cp_parser_non_integral_constant_expression (parser, NIC_ARRAY_REF)))
5224 postfix_expression = error_mark_node;
5226 return postfix_expression;
5229 /* A subroutine of cp_parser_postfix_expression that also gets hijacked
5230 by cp_parser_builtin_offsetof. We're looking for
5232 postfix-expression . template [opt] id-expression
5233 postfix-expression . pseudo-destructor-name
5234 postfix-expression -> template [opt] id-expression
5235 postfix-expression -> pseudo-destructor-name
5237 FOR_OFFSETOF is set if we're being called in that context. That sorta
5238 limits what of the above we'll actually accept, but nevermind.
5239 TOKEN_TYPE is the "." or "->" token, which will already have been
5240 removed from the stream. */
5243 cp_parser_postfix_dot_deref_expression (cp_parser *parser,
5244 enum cpp_ttype token_type,
5245 tree postfix_expression,
5246 bool for_offsetof, cp_id_kind *idk,
5247 location_t location)
5251 bool pseudo_destructor_p;
5252 tree scope = NULL_TREE;
5254 /* If this is a `->' operator, dereference the pointer. */
5255 if (token_type == CPP_DEREF)
5256 postfix_expression = build_x_arrow (postfix_expression);
5257 /* Check to see whether or not the expression is type-dependent. */
5258 dependent_p = type_dependent_expression_p (postfix_expression);
5259 /* The identifier following the `->' or `.' is not qualified. */
5260 parser->scope = NULL_TREE;
5261 parser->qualifying_scope = NULL_TREE;
5262 parser->object_scope = NULL_TREE;
5263 *idk = CP_ID_KIND_NONE;
5265 /* Enter the scope corresponding to the type of the object
5266 given by the POSTFIX_EXPRESSION. */
5267 if (!dependent_p && TREE_TYPE (postfix_expression) != NULL_TREE)
5269 scope = TREE_TYPE (postfix_expression);
5270 /* According to the standard, no expression should ever have
5271 reference type. Unfortunately, we do not currently match
5272 the standard in this respect in that our internal representation
5273 of an expression may have reference type even when the standard
5274 says it does not. Therefore, we have to manually obtain the
5275 underlying type here. */
5276 scope = non_reference (scope);
5277 /* The type of the POSTFIX_EXPRESSION must be complete. */
5278 if (scope == unknown_type_node)
5280 error_at (location, "%qE does not have class type",
5281 postfix_expression);
5285 scope = complete_type_or_else (scope, NULL_TREE);
5286 /* Let the name lookup machinery know that we are processing a
5287 class member access expression. */
5288 parser->context->object_type = scope;
5289 /* If something went wrong, we want to be able to discern that case,
5290 as opposed to the case where there was no SCOPE due to the type
5291 of expression being dependent. */
5293 scope = error_mark_node;
5294 /* If the SCOPE was erroneous, make the various semantic analysis
5295 functions exit quickly -- and without issuing additional error
5297 if (scope == error_mark_node)
5298 postfix_expression = error_mark_node;
5301 /* Assume this expression is not a pseudo-destructor access. */
5302 pseudo_destructor_p = false;
5304 /* If the SCOPE is a scalar type, then, if this is a valid program,
5305 we must be looking at a pseudo-destructor-name. If POSTFIX_EXPRESSION
5306 is type dependent, it can be pseudo-destructor-name or something else.
5307 Try to parse it as pseudo-destructor-name first. */
5308 if ((scope && SCALAR_TYPE_P (scope)) || dependent_p)
5313 cp_parser_parse_tentatively (parser);
5314 /* Parse the pseudo-destructor-name. */
5316 cp_parser_pseudo_destructor_name (parser, &s, &type);
5318 && (cp_parser_error_occurred (parser)
5319 || TREE_CODE (type) != TYPE_DECL
5320 || !SCALAR_TYPE_P (TREE_TYPE (type))))
5321 cp_parser_abort_tentative_parse (parser);
5322 else if (cp_parser_parse_definitely (parser))
5324 pseudo_destructor_p = true;
5326 = finish_pseudo_destructor_expr (postfix_expression,
5327 s, TREE_TYPE (type));
5331 if (!pseudo_destructor_p)
5333 /* If the SCOPE is not a scalar type, we are looking at an
5334 ordinary class member access expression, rather than a
5335 pseudo-destructor-name. */
5337 cp_token *token = cp_lexer_peek_token (parser->lexer);
5338 /* Parse the id-expression. */
5339 name = (cp_parser_id_expression
5341 cp_parser_optional_template_keyword (parser),
5342 /*check_dependency_p=*/true,
5344 /*declarator_p=*/false,
5345 /*optional_p=*/false));
5346 /* In general, build a SCOPE_REF if the member name is qualified.
5347 However, if the name was not dependent and has already been
5348 resolved; there is no need to build the SCOPE_REF. For example;
5350 struct X { void f(); };
5351 template <typename T> void f(T* t) { t->X::f(); }
5353 Even though "t" is dependent, "X::f" is not and has been resolved
5354 to a BASELINK; there is no need to include scope information. */
5356 /* But we do need to remember that there was an explicit scope for
5357 virtual function calls. */
5359 *idk = CP_ID_KIND_QUALIFIED;
5361 /* If the name is a template-id that names a type, we will get a
5362 TYPE_DECL here. That is invalid code. */
5363 if (TREE_CODE (name) == TYPE_DECL)
5365 error_at (token->location, "invalid use of %qD", name);
5366 postfix_expression = error_mark_node;
5370 if (name != error_mark_node && !BASELINK_P (name) && parser->scope)
5372 name = build_qualified_name (/*type=*/NULL_TREE,
5376 parser->scope = NULL_TREE;
5377 parser->qualifying_scope = NULL_TREE;
5378 parser->object_scope = NULL_TREE;
5380 if (scope && name && BASELINK_P (name))
5381 adjust_result_of_qualified_name_lookup
5382 (name, BINFO_TYPE (BASELINK_ACCESS_BINFO (name)), scope);
5384 = finish_class_member_access_expr (postfix_expression, name,
5386 tf_warning_or_error);
5390 /* We no longer need to look up names in the scope of the object on
5391 the left-hand side of the `.' or `->' operator. */
5392 parser->context->object_type = NULL_TREE;
5394 /* Outside of offsetof, these operators may not appear in
5395 constant-expressions. */
5397 && (cp_parser_non_integral_constant_expression
5398 (parser, token_type == CPP_DEREF ? NIC_ARROW : NIC_POINT)))
5399 postfix_expression = error_mark_node;
5401 return postfix_expression;
5404 /* Parse a parenthesized expression-list.
5407 assignment-expression
5408 expression-list, assignment-expression
5413 identifier, expression-list
5415 CAST_P is true if this expression is the target of a cast.
5417 ALLOW_EXPANSION_P is true if this expression allows expansion of an
5420 Returns a vector of trees. Each element is a representation of an
5421 assignment-expression. NULL is returned if the ( and or ) are
5422 missing. An empty, but allocated, vector is returned on no
5423 expressions. The parentheses are eaten. IS_ATTRIBUTE_LIST is id_attr
5424 if we are parsing an attribute list for an attribute that wants a
5425 plain identifier argument, normal_attr for an attribute that wants
5426 an expression, or non_attr if we aren't parsing an attribute list. If
5427 NON_CONSTANT_P is non-NULL, *NON_CONSTANT_P indicates whether or
5428 not all of the expressions in the list were constant. */
5430 static VEC(tree,gc) *
5431 cp_parser_parenthesized_expression_list (cp_parser* parser,
5432 int is_attribute_list,
5434 bool allow_expansion_p,
5435 bool *non_constant_p)
5437 VEC(tree,gc) *expression_list;
5438 bool fold_expr_p = is_attribute_list != non_attr;
5439 tree identifier = NULL_TREE;
5440 bool saved_greater_than_is_operator_p;
5442 /* Assume all the expressions will be constant. */
5444 *non_constant_p = false;
5446 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
5449 expression_list = make_tree_vector ();
5451 /* Within a parenthesized expression, a `>' token is always
5452 the greater-than operator. */
5453 saved_greater_than_is_operator_p
5454 = parser->greater_than_is_operator_p;
5455 parser->greater_than_is_operator_p = true;
5457 /* Consume expressions until there are no more. */
5458 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN))
5463 /* At the beginning of attribute lists, check to see if the
5464 next token is an identifier. */
5465 if (is_attribute_list == id_attr
5466 && cp_lexer_peek_token (parser->lexer)->type == CPP_NAME)
5470 /* Consume the identifier. */
5471 token = cp_lexer_consume_token (parser->lexer);
5472 /* Save the identifier. */
5473 identifier = token->u.value;
5477 bool expr_non_constant_p;
5479 /* Parse the next assignment-expression. */
5480 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
5482 /* A braced-init-list. */
5483 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5484 expr = cp_parser_braced_list (parser, &expr_non_constant_p);
5485 if (non_constant_p && expr_non_constant_p)
5486 *non_constant_p = true;
5488 else if (non_constant_p)
5490 expr = (cp_parser_constant_expression
5491 (parser, /*allow_non_constant_p=*/true,
5492 &expr_non_constant_p));
5493 if (expr_non_constant_p)
5494 *non_constant_p = true;
5497 expr = cp_parser_assignment_expression (parser, cast_p, NULL);
5500 expr = fold_non_dependent_expr (expr);
5502 /* If we have an ellipsis, then this is an expression
5504 if (allow_expansion_p
5505 && cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
5507 /* Consume the `...'. */
5508 cp_lexer_consume_token (parser->lexer);
5510 /* Build the argument pack. */
5511 expr = make_pack_expansion (expr);
5514 /* Add it to the list. We add error_mark_node
5515 expressions to the list, so that we can still tell if
5516 the correct form for a parenthesized expression-list
5517 is found. That gives better errors. */
5518 VEC_safe_push (tree, gc, expression_list, expr);
5520 if (expr == error_mark_node)
5524 /* After the first item, attribute lists look the same as
5525 expression lists. */
5526 is_attribute_list = non_attr;
5529 /* If the next token isn't a `,', then we are done. */
5530 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
5533 /* Otherwise, consume the `,' and keep going. */
5534 cp_lexer_consume_token (parser->lexer);
5537 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
5542 /* We try and resync to an unnested comma, as that will give the
5543 user better diagnostics. */
5544 ending = cp_parser_skip_to_closing_parenthesis (parser,
5545 /*recovering=*/true,
5547 /*consume_paren=*/true);
5552 parser->greater_than_is_operator_p
5553 = saved_greater_than_is_operator_p;
5558 parser->greater_than_is_operator_p
5559 = saved_greater_than_is_operator_p;
5562 VEC_safe_insert (tree, gc, expression_list, 0, identifier);
5564 return expression_list;
5567 /* Parse a pseudo-destructor-name.
5569 pseudo-destructor-name:
5570 :: [opt] nested-name-specifier [opt] type-name :: ~ type-name
5571 :: [opt] nested-name-specifier template template-id :: ~ type-name
5572 :: [opt] nested-name-specifier [opt] ~ type-name
5574 If either of the first two productions is used, sets *SCOPE to the
5575 TYPE specified before the final `::'. Otherwise, *SCOPE is set to
5576 NULL_TREE. *TYPE is set to the TYPE_DECL for the final type-name,
5577 or ERROR_MARK_NODE if the parse fails. */
5580 cp_parser_pseudo_destructor_name (cp_parser* parser,
5584 bool nested_name_specifier_p;
5586 /* Assume that things will not work out. */
5587 *type = error_mark_node;
5589 /* Look for the optional `::' operator. */
5590 cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/true);
5591 /* Look for the optional nested-name-specifier. */
5592 nested_name_specifier_p
5593 = (cp_parser_nested_name_specifier_opt (parser,
5594 /*typename_keyword_p=*/false,
5595 /*check_dependency_p=*/true,
5597 /*is_declaration=*/false)
5599 /* Now, if we saw a nested-name-specifier, we might be doing the
5600 second production. */
5601 if (nested_name_specifier_p
5602 && cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
5604 /* Consume the `template' keyword. */
5605 cp_lexer_consume_token (parser->lexer);
5606 /* Parse the template-id. */
5607 cp_parser_template_id (parser,
5608 /*template_keyword_p=*/true,
5609 /*check_dependency_p=*/false,
5610 /*is_declaration=*/true);
5611 /* Look for the `::' token. */
5612 cp_parser_require (parser, CPP_SCOPE, RT_SCOPE);
5614 /* If the next token is not a `~', then there might be some
5615 additional qualification. */
5616 else if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMPL))
5618 /* At this point, we're looking for "type-name :: ~". The type-name
5619 must not be a class-name, since this is a pseudo-destructor. So,
5620 it must be either an enum-name, or a typedef-name -- both of which
5621 are just identifiers. So, we peek ahead to check that the "::"
5622 and "~" tokens are present; if they are not, then we can avoid
5623 calling type_name. */
5624 if (cp_lexer_peek_token (parser->lexer)->type != CPP_NAME
5625 || cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_SCOPE
5626 || cp_lexer_peek_nth_token (parser->lexer, 3)->type != CPP_COMPL)
5628 cp_parser_error (parser, "non-scalar type");
5632 /* Look for the type-name. */
5633 *scope = TREE_TYPE (cp_parser_nonclass_name (parser));
5634 if (*scope == error_mark_node)
5637 /* Look for the `::' token. */
5638 cp_parser_require (parser, CPP_SCOPE, RT_SCOPE);
5643 /* Look for the `~'. */
5644 cp_parser_require (parser, CPP_COMPL, RT_COMPL);
5646 /* Once we see the ~, this has to be a pseudo-destructor. */
5647 if (!processing_template_decl && !cp_parser_error_occurred (parser))
5648 cp_parser_commit_to_tentative_parse (parser);
5650 /* Look for the type-name again. We are not responsible for
5651 checking that it matches the first type-name. */
5652 *type = cp_parser_nonclass_name (parser);
5655 /* Parse a unary-expression.
5661 unary-operator cast-expression
5662 sizeof unary-expression
5664 alignof ( type-id ) [C++0x]
5671 __extension__ cast-expression
5672 __alignof__ unary-expression
5673 __alignof__ ( type-id )
5674 alignof unary-expression [C++0x]
5675 __real__ cast-expression
5676 __imag__ cast-expression
5679 ADDRESS_P is true iff the unary-expression is appearing as the
5680 operand of the `&' operator. CAST_P is true if this expression is
5681 the target of a cast.
5683 Returns a representation of the expression. */
5686 cp_parser_unary_expression (cp_parser *parser, bool address_p, bool cast_p,
5690 enum tree_code unary_operator;
5692 /* Peek at the next token. */
5693 token = cp_lexer_peek_token (parser->lexer);
5694 /* Some keywords give away the kind of expression. */
5695 if (token->type == CPP_KEYWORD)
5697 enum rid keyword = token->keyword;
5707 op = keyword == RID_ALIGNOF ? ALIGNOF_EXPR : SIZEOF_EXPR;
5708 /* Consume the token. */
5709 cp_lexer_consume_token (parser->lexer);
5710 /* Parse the operand. */
5711 operand = cp_parser_sizeof_operand (parser, keyword);
5713 if (TYPE_P (operand))
5714 return cxx_sizeof_or_alignof_type (operand, op, true);
5717 /* ISO C++ defines alignof only with types, not with
5718 expressions. So pedwarn if alignof is used with a non-
5719 type expression. However, __alignof__ is ok. */
5720 if (!strcmp (IDENTIFIER_POINTER (token->u.value), "alignof"))
5721 pedwarn (token->location, OPT_pedantic,
5722 "ISO C++ does not allow %<alignof%> "
5725 return cxx_sizeof_or_alignof_expr (operand, op, true);
5730 return cp_parser_new_expression (parser);
5733 return cp_parser_delete_expression (parser);
5737 /* The saved value of the PEDANTIC flag. */
5741 /* Save away the PEDANTIC flag. */
5742 cp_parser_extension_opt (parser, &saved_pedantic);
5743 /* Parse the cast-expression. */
5744 expr = cp_parser_simple_cast_expression (parser);
5745 /* Restore the PEDANTIC flag. */
5746 pedantic = saved_pedantic;
5756 /* Consume the `__real__' or `__imag__' token. */
5757 cp_lexer_consume_token (parser->lexer);
5758 /* Parse the cast-expression. */
5759 expression = cp_parser_simple_cast_expression (parser);
5760 /* Create the complete representation. */
5761 return build_x_unary_op ((keyword == RID_REALPART
5762 ? REALPART_EXPR : IMAGPART_EXPR),
5764 tf_warning_or_error);
5771 const char *saved_message;
5772 bool saved_integral_constant_expression_p;
5773 bool saved_non_integral_constant_expression_p;
5774 bool saved_greater_than_is_operator_p;
5776 cp_lexer_consume_token (parser->lexer);
5777 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
5779 saved_message = parser->type_definition_forbidden_message;
5780 parser->type_definition_forbidden_message
5781 = G_("types may not be defined in %<noexcept%> expressions");
5783 saved_integral_constant_expression_p
5784 = parser->integral_constant_expression_p;
5785 saved_non_integral_constant_expression_p
5786 = parser->non_integral_constant_expression_p;
5787 parser->integral_constant_expression_p = false;
5789 saved_greater_than_is_operator_p
5790 = parser->greater_than_is_operator_p;
5791 parser->greater_than_is_operator_p = true;
5793 ++cp_unevaluated_operand;
5794 ++c_inhibit_evaluation_warnings;
5795 expr = cp_parser_expression (parser, false, NULL);
5796 --c_inhibit_evaluation_warnings;
5797 --cp_unevaluated_operand;
5799 parser->greater_than_is_operator_p
5800 = saved_greater_than_is_operator_p;
5802 parser->integral_constant_expression_p
5803 = saved_integral_constant_expression_p;
5804 parser->non_integral_constant_expression_p
5805 = saved_non_integral_constant_expression_p;
5807 parser->type_definition_forbidden_message = saved_message;
5809 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
5810 return finish_noexcept_expr (expr, tf_warning_or_error);
5818 /* Look for the `:: new' and `:: delete', which also signal the
5819 beginning of a new-expression, or delete-expression,
5820 respectively. If the next token is `::', then it might be one of
5822 if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
5826 /* See if the token after the `::' is one of the keywords in
5827 which we're interested. */
5828 keyword = cp_lexer_peek_nth_token (parser->lexer, 2)->keyword;
5829 /* If it's `new', we have a new-expression. */
5830 if (keyword == RID_NEW)
5831 return cp_parser_new_expression (parser);
5832 /* Similarly, for `delete'. */
5833 else if (keyword == RID_DELETE)
5834 return cp_parser_delete_expression (parser);
5837 /* Look for a unary operator. */
5838 unary_operator = cp_parser_unary_operator (token);
5839 /* The `++' and `--' operators can be handled similarly, even though
5840 they are not technically unary-operators in the grammar. */
5841 if (unary_operator == ERROR_MARK)
5843 if (token->type == CPP_PLUS_PLUS)
5844 unary_operator = PREINCREMENT_EXPR;
5845 else if (token->type == CPP_MINUS_MINUS)
5846 unary_operator = PREDECREMENT_EXPR;
5847 /* Handle the GNU address-of-label extension. */
5848 else if (cp_parser_allow_gnu_extensions_p (parser)
5849 && token->type == CPP_AND_AND)
5853 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
5855 /* Consume the '&&' token. */
5856 cp_lexer_consume_token (parser->lexer);
5857 /* Look for the identifier. */
5858 identifier = cp_parser_identifier (parser);
5859 /* Create an expression representing the address. */
5860 expression = finish_label_address_expr (identifier, loc);
5861 if (cp_parser_non_integral_constant_expression (parser,
5863 expression = error_mark_node;
5867 if (unary_operator != ERROR_MARK)
5869 tree cast_expression;
5870 tree expression = error_mark_node;
5871 non_integral_constant non_constant_p = NIC_NONE;
5873 /* Consume the operator token. */
5874 token = cp_lexer_consume_token (parser->lexer);
5875 /* Parse the cast-expression. */
5877 = cp_parser_cast_expression (parser,
5878 unary_operator == ADDR_EXPR,
5879 /*cast_p=*/false, pidk);
5880 /* Now, build an appropriate representation. */
5881 switch (unary_operator)
5884 non_constant_p = NIC_STAR;
5885 expression = build_x_indirect_ref (cast_expression, RO_UNARY_STAR,
5886 tf_warning_or_error);
5890 non_constant_p = NIC_ADDR;
5893 expression = build_x_unary_op (unary_operator, cast_expression,
5894 tf_warning_or_error);
5897 case PREINCREMENT_EXPR:
5898 case PREDECREMENT_EXPR:
5899 non_constant_p = unary_operator == PREINCREMENT_EXPR
5900 ? NIC_PREINCREMENT : NIC_PREDECREMENT;
5902 case UNARY_PLUS_EXPR:
5904 case TRUTH_NOT_EXPR:
5905 expression = finish_unary_op_expr (unary_operator, cast_expression);
5912 if (non_constant_p != NIC_NONE
5913 && cp_parser_non_integral_constant_expression (parser,
5915 expression = error_mark_node;
5920 return cp_parser_postfix_expression (parser, address_p, cast_p,
5921 /*member_access_only_p=*/false,
5925 /* Returns ERROR_MARK if TOKEN is not a unary-operator. If TOKEN is a
5926 unary-operator, the corresponding tree code is returned. */
5928 static enum tree_code
5929 cp_parser_unary_operator (cp_token* token)
5931 switch (token->type)
5934 return INDIRECT_REF;
5940 return UNARY_PLUS_EXPR;
5946 return TRUTH_NOT_EXPR;
5949 return BIT_NOT_EXPR;
5956 /* Parse a new-expression.
5959 :: [opt] new new-placement [opt] new-type-id new-initializer [opt]
5960 :: [opt] new new-placement [opt] ( type-id ) new-initializer [opt]
5962 Returns a representation of the expression. */
5965 cp_parser_new_expression (cp_parser* parser)
5967 bool global_scope_p;
5968 VEC(tree,gc) *placement;
5970 VEC(tree,gc) *initializer;
5974 /* Look for the optional `::' operator. */
5976 = (cp_parser_global_scope_opt (parser,
5977 /*current_scope_valid_p=*/false)
5979 /* Look for the `new' operator. */
5980 cp_parser_require_keyword (parser, RID_NEW, RT_NEW);
5981 /* There's no easy way to tell a new-placement from the
5982 `( type-id )' construct. */
5983 cp_parser_parse_tentatively (parser);
5984 /* Look for a new-placement. */
5985 placement = cp_parser_new_placement (parser);
5986 /* If that didn't work out, there's no new-placement. */
5987 if (!cp_parser_parse_definitely (parser))
5989 if (placement != NULL)
5990 release_tree_vector (placement);
5994 /* If the next token is a `(', then we have a parenthesized
5996 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
5999 /* Consume the `('. */
6000 cp_lexer_consume_token (parser->lexer);
6001 /* Parse the type-id. */
6002 type = cp_parser_type_id (parser);
6003 /* Look for the closing `)'. */
6004 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
6005 token = cp_lexer_peek_token (parser->lexer);
6006 /* There should not be a direct-new-declarator in this production,
6007 but GCC used to allowed this, so we check and emit a sensible error
6008 message for this case. */
6009 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
6011 error_at (token->location,
6012 "array bound forbidden after parenthesized type-id");
6013 inform (token->location,
6014 "try removing the parentheses around the type-id");
6015 cp_parser_direct_new_declarator (parser);
6019 /* Otherwise, there must be a new-type-id. */
6021 type = cp_parser_new_type_id (parser, &nelts);
6023 /* If the next token is a `(' or '{', then we have a new-initializer. */
6024 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN)
6025 || cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
6026 initializer = cp_parser_new_initializer (parser);
6030 /* A new-expression may not appear in an integral constant
6032 if (cp_parser_non_integral_constant_expression (parser, NIC_NEW))
6033 ret = error_mark_node;
6036 /* Create a representation of the new-expression. */
6037 ret = build_new (&placement, type, nelts, &initializer, global_scope_p,
6038 tf_warning_or_error);
6041 if (placement != NULL)
6042 release_tree_vector (placement);
6043 if (initializer != NULL)
6044 release_tree_vector (initializer);
6049 /* Parse a new-placement.
6054 Returns the same representation as for an expression-list. */
6056 static VEC(tree,gc) *
6057 cp_parser_new_placement (cp_parser* parser)
6059 VEC(tree,gc) *expression_list;
6061 /* Parse the expression-list. */
6062 expression_list = (cp_parser_parenthesized_expression_list
6063 (parser, non_attr, /*cast_p=*/false,
6064 /*allow_expansion_p=*/true,
6065 /*non_constant_p=*/NULL));
6067 return expression_list;
6070 /* Parse a new-type-id.
6073 type-specifier-seq new-declarator [opt]
6075 Returns the TYPE allocated. If the new-type-id indicates an array
6076 type, *NELTS is set to the number of elements in the last array
6077 bound; the TYPE will not include the last array bound. */
6080 cp_parser_new_type_id (cp_parser* parser, tree *nelts)
6082 cp_decl_specifier_seq type_specifier_seq;
6083 cp_declarator *new_declarator;
6084 cp_declarator *declarator;
6085 cp_declarator *outer_declarator;
6086 const char *saved_message;
6089 /* The type-specifier sequence must not contain type definitions.
6090 (It cannot contain declarations of new types either, but if they
6091 are not definitions we will catch that because they are not
6093 saved_message = parser->type_definition_forbidden_message;
6094 parser->type_definition_forbidden_message
6095 = G_("types may not be defined in a new-type-id");
6096 /* Parse the type-specifier-seq. */
6097 cp_parser_type_specifier_seq (parser, /*is_declaration=*/false,
6098 /*is_trailing_return=*/false,
6099 &type_specifier_seq);
6100 /* Restore the old message. */
6101 parser->type_definition_forbidden_message = saved_message;
6102 /* Parse the new-declarator. */
6103 new_declarator = cp_parser_new_declarator_opt (parser);
6105 /* Determine the number of elements in the last array dimension, if
6108 /* Skip down to the last array dimension. */
6109 declarator = new_declarator;
6110 outer_declarator = NULL;
6111 while (declarator && (declarator->kind == cdk_pointer
6112 || declarator->kind == cdk_ptrmem))
6114 outer_declarator = declarator;
6115 declarator = declarator->declarator;
6118 && declarator->kind == cdk_array
6119 && declarator->declarator
6120 && declarator->declarator->kind == cdk_array)
6122 outer_declarator = declarator;
6123 declarator = declarator->declarator;
6126 if (declarator && declarator->kind == cdk_array)
6128 *nelts = declarator->u.array.bounds;
6129 if (*nelts == error_mark_node)
6130 *nelts = integer_one_node;
6132 if (outer_declarator)
6133 outer_declarator->declarator = declarator->declarator;
6135 new_declarator = NULL;
6138 type = groktypename (&type_specifier_seq, new_declarator, false);
6142 /* Parse an (optional) new-declarator.
6145 ptr-operator new-declarator [opt]
6146 direct-new-declarator
6148 Returns the declarator. */
6150 static cp_declarator *
6151 cp_parser_new_declarator_opt (cp_parser* parser)
6153 enum tree_code code;
6155 cp_cv_quals cv_quals;
6157 /* We don't know if there's a ptr-operator next, or not. */
6158 cp_parser_parse_tentatively (parser);
6159 /* Look for a ptr-operator. */
6160 code = cp_parser_ptr_operator (parser, &type, &cv_quals);
6161 /* If that worked, look for more new-declarators. */
6162 if (cp_parser_parse_definitely (parser))
6164 cp_declarator *declarator;
6166 /* Parse another optional declarator. */
6167 declarator = cp_parser_new_declarator_opt (parser);
6169 return cp_parser_make_indirect_declarator
6170 (code, type, cv_quals, declarator);
6173 /* If the next token is a `[', there is a direct-new-declarator. */
6174 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
6175 return cp_parser_direct_new_declarator (parser);
6180 /* Parse a direct-new-declarator.
6182 direct-new-declarator:
6184 direct-new-declarator [constant-expression]
6188 static cp_declarator *
6189 cp_parser_direct_new_declarator (cp_parser* parser)
6191 cp_declarator *declarator = NULL;
6197 /* Look for the opening `['. */
6198 cp_parser_require (parser, CPP_OPEN_SQUARE, RT_OPEN_SQUARE);
6199 /* The first expression is not required to be constant. */
6202 cp_token *token = cp_lexer_peek_token (parser->lexer);
6203 expression = cp_parser_expression (parser, /*cast_p=*/false, NULL);
6204 /* The standard requires that the expression have integral
6205 type. DR 74 adds enumeration types. We believe that the
6206 real intent is that these expressions be handled like the
6207 expression in a `switch' condition, which also allows
6208 classes with a single conversion to integral or
6209 enumeration type. */
6210 if (!processing_template_decl)
6213 = build_expr_type_conversion (WANT_INT | WANT_ENUM,
6218 error_at (token->location,
6219 "expression in new-declarator must have integral "
6220 "or enumeration type");
6221 expression = error_mark_node;
6225 /* But all the other expressions must be. */
6228 = cp_parser_constant_expression (parser,
6229 /*allow_non_constant=*/false,
6231 /* Look for the closing `]'. */
6232 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
6234 /* Add this bound to the declarator. */
6235 declarator = make_array_declarator (declarator, expression);
6237 /* If the next token is not a `[', then there are no more
6239 if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_SQUARE))
6246 /* Parse a new-initializer.
6249 ( expression-list [opt] )
6252 Returns a representation of the expression-list. */
6254 static VEC(tree,gc) *
6255 cp_parser_new_initializer (cp_parser* parser)
6257 VEC(tree,gc) *expression_list;
6259 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
6262 bool expr_non_constant_p;
6263 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
6264 t = cp_parser_braced_list (parser, &expr_non_constant_p);
6265 CONSTRUCTOR_IS_DIRECT_INIT (t) = 1;
6266 expression_list = make_tree_vector_single (t);
6269 expression_list = (cp_parser_parenthesized_expression_list
6270 (parser, non_attr, /*cast_p=*/false,
6271 /*allow_expansion_p=*/true,
6272 /*non_constant_p=*/NULL));
6274 return expression_list;
6277 /* Parse a delete-expression.
6280 :: [opt] delete cast-expression
6281 :: [opt] delete [ ] cast-expression
6283 Returns a representation of the expression. */
6286 cp_parser_delete_expression (cp_parser* parser)
6288 bool global_scope_p;
6292 /* Look for the optional `::' operator. */
6294 = (cp_parser_global_scope_opt (parser,
6295 /*current_scope_valid_p=*/false)
6297 /* Look for the `delete' keyword. */
6298 cp_parser_require_keyword (parser, RID_DELETE, RT_DELETE);
6299 /* See if the array syntax is in use. */
6300 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
6302 /* Consume the `[' token. */
6303 cp_lexer_consume_token (parser->lexer);
6304 /* Look for the `]' token. */
6305 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
6306 /* Remember that this is the `[]' construct. */
6312 /* Parse the cast-expression. */
6313 expression = cp_parser_simple_cast_expression (parser);
6315 /* A delete-expression may not appear in an integral constant
6317 if (cp_parser_non_integral_constant_expression (parser, NIC_DEL))
6318 return error_mark_node;
6320 return delete_sanity (expression, NULL_TREE, array_p, global_scope_p,
6321 tf_warning_or_error);
6324 /* Returns true if TOKEN may start a cast-expression and false
6328 cp_parser_token_starts_cast_expression (cp_token *token)
6330 switch (token->type)
6336 case CPP_CLOSE_SQUARE:
6337 case CPP_CLOSE_PAREN:
6338 case CPP_CLOSE_BRACE:
6342 case CPP_DEREF_STAR:
6350 case CPP_GREATER_EQ:
6370 /* '[' may start a primary-expression in obj-c++. */
6371 case CPP_OPEN_SQUARE:
6372 return c_dialect_objc ();
6379 /* Parse a cast-expression.
6383 ( type-id ) cast-expression
6385 ADDRESS_P is true iff the unary-expression is appearing as the
6386 operand of the `&' operator. CAST_P is true if this expression is
6387 the target of a cast.
6389 Returns a representation of the expression. */
6392 cp_parser_cast_expression (cp_parser *parser, bool address_p, bool cast_p,
6395 /* If it's a `(', then we might be looking at a cast. */
6396 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
6398 tree type = NULL_TREE;
6399 tree expr = NULL_TREE;
6400 bool compound_literal_p;
6401 const char *saved_message;
6403 /* There's no way to know yet whether or not this is a cast.
6404 For example, `(int (3))' is a unary-expression, while `(int)
6405 3' is a cast. So, we resort to parsing tentatively. */
6406 cp_parser_parse_tentatively (parser);
6407 /* Types may not be defined in a cast. */
6408 saved_message = parser->type_definition_forbidden_message;
6409 parser->type_definition_forbidden_message
6410 = G_("types may not be defined in casts");
6411 /* Consume the `('. */
6412 cp_lexer_consume_token (parser->lexer);
6413 /* A very tricky bit is that `(struct S) { 3 }' is a
6414 compound-literal (which we permit in C++ as an extension).
6415 But, that construct is not a cast-expression -- it is a
6416 postfix-expression. (The reason is that `(struct S) { 3 }.i'
6417 is legal; if the compound-literal were a cast-expression,
6418 you'd need an extra set of parentheses.) But, if we parse
6419 the type-id, and it happens to be a class-specifier, then we
6420 will commit to the parse at that point, because we cannot
6421 undo the action that is done when creating a new class. So,
6422 then we cannot back up and do a postfix-expression.
6424 Therefore, we scan ahead to the closing `)', and check to see
6425 if the token after the `)' is a `{'. If so, we are not
6426 looking at a cast-expression.
6428 Save tokens so that we can put them back. */
6429 cp_lexer_save_tokens (parser->lexer);
6430 /* Skip tokens until the next token is a closing parenthesis.
6431 If we find the closing `)', and the next token is a `{', then
6432 we are looking at a compound-literal. */
6434 = (cp_parser_skip_to_closing_parenthesis (parser, false, false,
6435 /*consume_paren=*/true)
6436 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE));
6437 /* Roll back the tokens we skipped. */
6438 cp_lexer_rollback_tokens (parser->lexer);
6439 /* If we were looking at a compound-literal, simulate an error
6440 so that the call to cp_parser_parse_definitely below will
6442 if (compound_literal_p)
6443 cp_parser_simulate_error (parser);
6446 bool saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
6447 parser->in_type_id_in_expr_p = true;
6448 /* Look for the type-id. */
6449 type = cp_parser_type_id (parser);
6450 /* Look for the closing `)'. */
6451 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
6452 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
6455 /* Restore the saved message. */
6456 parser->type_definition_forbidden_message = saved_message;
6458 /* At this point this can only be either a cast or a
6459 parenthesized ctor such as `(T ())' that looks like a cast to
6460 function returning T. */
6461 if (!cp_parser_error_occurred (parser)
6462 && cp_parser_token_starts_cast_expression (cp_lexer_peek_token
6465 cp_parser_parse_definitely (parser);
6466 expr = cp_parser_cast_expression (parser,
6467 /*address_p=*/false,
6468 /*cast_p=*/true, pidk);
6470 /* Warn about old-style casts, if so requested. */
6471 if (warn_old_style_cast
6472 && !in_system_header
6473 && !VOID_TYPE_P (type)
6474 && current_lang_name != lang_name_c)
6475 warning (OPT_Wold_style_cast, "use of old-style cast");
6477 /* Only type conversions to integral or enumeration types
6478 can be used in constant-expressions. */
6479 if (!cast_valid_in_integral_constant_expression_p (type)
6480 && cp_parser_non_integral_constant_expression (parser,
6482 return error_mark_node;
6484 /* Perform the cast. */
6485 expr = build_c_cast (input_location, type, expr);
6489 cp_parser_abort_tentative_parse (parser);
6492 /* If we get here, then it's not a cast, so it must be a
6493 unary-expression. */
6494 return cp_parser_unary_expression (parser, address_p, cast_p, pidk);
6497 /* Parse a binary expression of the general form:
6501 pm-expression .* cast-expression
6502 pm-expression ->* cast-expression
6504 multiplicative-expression:
6506 multiplicative-expression * pm-expression
6507 multiplicative-expression / pm-expression
6508 multiplicative-expression % pm-expression
6510 additive-expression:
6511 multiplicative-expression
6512 additive-expression + multiplicative-expression
6513 additive-expression - multiplicative-expression
6517 shift-expression << additive-expression
6518 shift-expression >> additive-expression
6520 relational-expression:
6522 relational-expression < shift-expression
6523 relational-expression > shift-expression
6524 relational-expression <= shift-expression
6525 relational-expression >= shift-expression
6529 relational-expression:
6530 relational-expression <? shift-expression
6531 relational-expression >? shift-expression
6533 equality-expression:
6534 relational-expression
6535 equality-expression == relational-expression
6536 equality-expression != relational-expression
6540 and-expression & equality-expression
6542 exclusive-or-expression:
6544 exclusive-or-expression ^ and-expression
6546 inclusive-or-expression:
6547 exclusive-or-expression
6548 inclusive-or-expression | exclusive-or-expression
6550 logical-and-expression:
6551 inclusive-or-expression
6552 logical-and-expression && inclusive-or-expression
6554 logical-or-expression:
6555 logical-and-expression
6556 logical-or-expression || logical-and-expression
6558 All these are implemented with a single function like:
6561 simple-cast-expression
6562 binary-expression <token> binary-expression
6564 CAST_P is true if this expression is the target of a cast.
6566 The binops_by_token map is used to get the tree codes for each <token> type.
6567 binary-expressions are associated according to a precedence table. */
6569 #define TOKEN_PRECEDENCE(token) \
6570 (((token->type == CPP_GREATER \
6571 || ((cxx_dialect != cxx98) && token->type == CPP_RSHIFT)) \
6572 && !parser->greater_than_is_operator_p) \
6573 ? PREC_NOT_OPERATOR \
6574 : binops_by_token[token->type].prec)
6577 cp_parser_binary_expression (cp_parser* parser, bool cast_p,
6578 bool no_toplevel_fold_p,
6579 enum cp_parser_prec prec,
6582 cp_parser_expression_stack stack;
6583 cp_parser_expression_stack_entry *sp = &stack[0];
6586 enum tree_code tree_type, lhs_type, rhs_type;
6587 enum cp_parser_prec new_prec, lookahead_prec;
6590 /* Parse the first expression. */
6591 lhs = cp_parser_cast_expression (parser, /*address_p=*/false, cast_p, pidk);
6592 lhs_type = ERROR_MARK;
6596 /* Get an operator token. */
6597 token = cp_lexer_peek_token (parser->lexer);
6599 if (warn_cxx0x_compat
6600 && token->type == CPP_RSHIFT
6601 && !parser->greater_than_is_operator_p)
6603 if (warning_at (token->location, OPT_Wc__0x_compat,
6604 "%<>>%> operator will be treated as"
6605 " two right angle brackets in C++0x"))
6606 inform (token->location,
6607 "suggest parentheses around %<>>%> expression");
6610 new_prec = TOKEN_PRECEDENCE (token);
6612 /* Popping an entry off the stack means we completed a subexpression:
6613 - either we found a token which is not an operator (`>' where it is not
6614 an operator, or prec == PREC_NOT_OPERATOR), in which case popping
6615 will happen repeatedly;
6616 - or, we found an operator which has lower priority. This is the case
6617 where the recursive descent *ascends*, as in `3 * 4 + 5' after
6619 if (new_prec <= prec)
6628 tree_type = binops_by_token[token->type].tree_type;
6630 /* We used the operator token. */
6631 cp_lexer_consume_token (parser->lexer);
6633 /* For "false && x" or "true || x", x will never be executed;
6634 disable warnings while evaluating it. */
6635 if (tree_type == TRUTH_ANDIF_EXPR)
6636 c_inhibit_evaluation_warnings += lhs == truthvalue_false_node;
6637 else if (tree_type == TRUTH_ORIF_EXPR)
6638 c_inhibit_evaluation_warnings += lhs == truthvalue_true_node;
6640 /* Extract another operand. It may be the RHS of this expression
6641 or the LHS of a new, higher priority expression. */
6642 rhs = cp_parser_simple_cast_expression (parser);
6643 rhs_type = ERROR_MARK;
6645 /* Get another operator token. Look up its precedence to avoid
6646 building a useless (immediately popped) stack entry for common
6647 cases such as 3 + 4 + 5 or 3 * 4 + 5. */
6648 token = cp_lexer_peek_token (parser->lexer);
6649 lookahead_prec = TOKEN_PRECEDENCE (token);
6650 if (lookahead_prec > new_prec)
6652 /* ... and prepare to parse the RHS of the new, higher priority
6653 expression. Since precedence levels on the stack are
6654 monotonically increasing, we do not have to care about
6657 sp->tree_type = tree_type;
6659 sp->lhs_type = lhs_type;
6662 lhs_type = rhs_type;
6664 new_prec = lookahead_prec;
6668 lookahead_prec = new_prec;
6669 /* If the stack is not empty, we have parsed into LHS the right side
6670 (`4' in the example above) of an expression we had suspended.
6671 We can use the information on the stack to recover the LHS (`3')
6672 from the stack together with the tree code (`MULT_EXPR'), and
6673 the precedence of the higher level subexpression
6674 (`PREC_ADDITIVE_EXPRESSION'). TOKEN is the CPP_PLUS token,
6675 which will be used to actually build the additive expression. */
6678 tree_type = sp->tree_type;
6680 rhs_type = lhs_type;
6682 lhs_type = sp->lhs_type;
6685 /* Undo the disabling of warnings done above. */
6686 if (tree_type == TRUTH_ANDIF_EXPR)
6687 c_inhibit_evaluation_warnings -= lhs == truthvalue_false_node;
6688 else if (tree_type == TRUTH_ORIF_EXPR)
6689 c_inhibit_evaluation_warnings -= lhs == truthvalue_true_node;
6691 overloaded_p = false;
6692 /* ??? Currently we pass lhs_type == ERROR_MARK and rhs_type ==
6693 ERROR_MARK for everything that is not a binary expression.
6694 This makes warn_about_parentheses miss some warnings that
6695 involve unary operators. For unary expressions we should
6696 pass the correct tree_code unless the unary expression was
6697 surrounded by parentheses.
6699 if (no_toplevel_fold_p
6700 && lookahead_prec <= prec
6702 && TREE_CODE_CLASS (tree_type) == tcc_comparison)
6703 lhs = build2 (tree_type, boolean_type_node, lhs, rhs);
6705 lhs = build_x_binary_op (tree_type, lhs, lhs_type, rhs, rhs_type,
6706 &overloaded_p, tf_warning_or_error);
6707 lhs_type = tree_type;
6709 /* If the binary operator required the use of an overloaded operator,
6710 then this expression cannot be an integral constant-expression.
6711 An overloaded operator can be used even if both operands are
6712 otherwise permissible in an integral constant-expression if at
6713 least one of the operands is of enumeration type. */
6716 && cp_parser_non_integral_constant_expression (parser,
6718 return error_mark_node;
6725 /* Parse the `? expression : assignment-expression' part of a
6726 conditional-expression. The LOGICAL_OR_EXPR is the
6727 logical-or-expression that started the conditional-expression.
6728 Returns a representation of the entire conditional-expression.
6730 This routine is used by cp_parser_assignment_expression.
6732 ? expression : assignment-expression
6736 ? : assignment-expression */
6739 cp_parser_question_colon_clause (cp_parser* parser, tree logical_or_expr)
6742 tree assignment_expr;
6743 struct cp_token *token;
6745 /* Consume the `?' token. */
6746 cp_lexer_consume_token (parser->lexer);
6747 token = cp_lexer_peek_token (parser->lexer);
6748 if (cp_parser_allow_gnu_extensions_p (parser)
6749 && token->type == CPP_COLON)
6751 pedwarn (token->location, OPT_pedantic,
6752 "ISO C++ does not allow ?: with omitted middle operand");
6753 /* Implicit true clause. */
6755 c_inhibit_evaluation_warnings += logical_or_expr == truthvalue_true_node;
6756 warn_for_omitted_condop (token->location, logical_or_expr);
6760 bool saved_colon_corrects_to_scope_p = parser->colon_corrects_to_scope_p;
6761 parser->colon_corrects_to_scope_p = false;
6762 /* Parse the expression. */
6763 c_inhibit_evaluation_warnings += logical_or_expr == truthvalue_false_node;
6764 expr = cp_parser_expression (parser, /*cast_p=*/false, NULL);
6765 c_inhibit_evaluation_warnings +=
6766 ((logical_or_expr == truthvalue_true_node)
6767 - (logical_or_expr == truthvalue_false_node));
6768 parser->colon_corrects_to_scope_p = saved_colon_corrects_to_scope_p;
6771 /* The next token should be a `:'. */
6772 cp_parser_require (parser, CPP_COLON, RT_COLON);
6773 /* Parse the assignment-expression. */
6774 assignment_expr = cp_parser_assignment_expression (parser, /*cast_p=*/false, NULL);
6775 c_inhibit_evaluation_warnings -= logical_or_expr == truthvalue_true_node;
6777 /* Build the conditional-expression. */
6778 return build_x_conditional_expr (logical_or_expr,
6781 tf_warning_or_error);
6784 /* Parse an assignment-expression.
6786 assignment-expression:
6787 conditional-expression
6788 logical-or-expression assignment-operator assignment_expression
6791 CAST_P is true if this expression is the target of a cast.
6793 Returns a representation for the expression. */
6796 cp_parser_assignment_expression (cp_parser* parser, bool cast_p,
6801 /* If the next token is the `throw' keyword, then we're looking at
6802 a throw-expression. */
6803 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_THROW))
6804 expr = cp_parser_throw_expression (parser);
6805 /* Otherwise, it must be that we are looking at a
6806 logical-or-expression. */
6809 /* Parse the binary expressions (logical-or-expression). */
6810 expr = cp_parser_binary_expression (parser, cast_p, false,
6811 PREC_NOT_OPERATOR, pidk);
6812 /* If the next token is a `?' then we're actually looking at a
6813 conditional-expression. */
6814 if (cp_lexer_next_token_is (parser->lexer, CPP_QUERY))
6815 return cp_parser_question_colon_clause (parser, expr);
6818 enum tree_code assignment_operator;
6820 /* If it's an assignment-operator, we're using the second
6823 = cp_parser_assignment_operator_opt (parser);
6824 if (assignment_operator != ERROR_MARK)
6826 bool non_constant_p;
6828 /* Parse the right-hand side of the assignment. */
6829 tree rhs = cp_parser_initializer_clause (parser, &non_constant_p);
6831 if (BRACE_ENCLOSED_INITIALIZER_P (rhs))
6832 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
6834 /* An assignment may not appear in a
6835 constant-expression. */
6836 if (cp_parser_non_integral_constant_expression (parser,
6838 return error_mark_node;
6839 /* Build the assignment expression. */
6840 expr = build_x_modify_expr (expr,
6841 assignment_operator,
6843 tf_warning_or_error);
6851 /* Parse an (optional) assignment-operator.
6853 assignment-operator: one of
6854 = *= /= %= += -= >>= <<= &= ^= |=
6858 assignment-operator: one of
6861 If the next token is an assignment operator, the corresponding tree
6862 code is returned, and the token is consumed. For example, for
6863 `+=', PLUS_EXPR is returned. For `=' itself, the code returned is
6864 NOP_EXPR. For `/', TRUNC_DIV_EXPR is returned; for `%',
6865 TRUNC_MOD_EXPR is returned. If TOKEN is not an assignment
6866 operator, ERROR_MARK is returned. */
6868 static enum tree_code
6869 cp_parser_assignment_operator_opt (cp_parser* parser)
6874 /* Peek at the next token. */
6875 token = cp_lexer_peek_token (parser->lexer);
6877 switch (token->type)
6888 op = TRUNC_DIV_EXPR;
6892 op = TRUNC_MOD_EXPR;
6924 /* Nothing else is an assignment operator. */
6928 /* If it was an assignment operator, consume it. */
6929 if (op != ERROR_MARK)
6930 cp_lexer_consume_token (parser->lexer);
6935 /* Parse an expression.
6938 assignment-expression
6939 expression , assignment-expression
6941 CAST_P is true if this expression is the target of a cast.
6943 Returns a representation of the expression. */
6946 cp_parser_expression (cp_parser* parser, bool cast_p, cp_id_kind * pidk)
6948 tree expression = NULL_TREE;
6952 tree assignment_expression;
6954 /* Parse the next assignment-expression. */
6955 assignment_expression
6956 = cp_parser_assignment_expression (parser, cast_p, pidk);
6957 /* If this is the first assignment-expression, we can just
6960 expression = assignment_expression;
6962 expression = build_x_compound_expr (expression,
6963 assignment_expression,
6964 tf_warning_or_error);
6965 /* If the next token is not a comma, then we are done with the
6967 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
6969 /* Consume the `,'. */
6970 cp_lexer_consume_token (parser->lexer);
6971 /* A comma operator cannot appear in a constant-expression. */
6972 if (cp_parser_non_integral_constant_expression (parser, NIC_COMMA))
6973 expression = error_mark_node;
6979 /* Parse a constant-expression.
6981 constant-expression:
6982 conditional-expression
6984 If ALLOW_NON_CONSTANT_P a non-constant expression is silently
6985 accepted. If ALLOW_NON_CONSTANT_P is true and the expression is not
6986 constant, *NON_CONSTANT_P is set to TRUE. If ALLOW_NON_CONSTANT_P
6987 is false, NON_CONSTANT_P should be NULL. */
6990 cp_parser_constant_expression (cp_parser* parser,
6991 bool allow_non_constant_p,
6992 bool *non_constant_p)
6994 bool saved_integral_constant_expression_p;
6995 bool saved_allow_non_integral_constant_expression_p;
6996 bool saved_non_integral_constant_expression_p;
6999 /* It might seem that we could simply parse the
7000 conditional-expression, and then check to see if it were
7001 TREE_CONSTANT. However, an expression that is TREE_CONSTANT is
7002 one that the compiler can figure out is constant, possibly after
7003 doing some simplifications or optimizations. The standard has a
7004 precise definition of constant-expression, and we must honor
7005 that, even though it is somewhat more restrictive.
7011 is not a legal declaration, because `(2, 3)' is not a
7012 constant-expression. The `,' operator is forbidden in a
7013 constant-expression. However, GCC's constant-folding machinery
7014 will fold this operation to an INTEGER_CST for `3'. */
7016 /* Save the old settings. */
7017 saved_integral_constant_expression_p = parser->integral_constant_expression_p;
7018 saved_allow_non_integral_constant_expression_p
7019 = parser->allow_non_integral_constant_expression_p;
7020 saved_non_integral_constant_expression_p = parser->non_integral_constant_expression_p;
7021 /* We are now parsing a constant-expression. */
7022 parser->integral_constant_expression_p = true;
7023 parser->allow_non_integral_constant_expression_p
7024 = (allow_non_constant_p || cxx_dialect >= cxx0x);
7025 parser->non_integral_constant_expression_p = false;
7026 /* Although the grammar says "conditional-expression", we parse an
7027 "assignment-expression", which also permits "throw-expression"
7028 and the use of assignment operators. In the case that
7029 ALLOW_NON_CONSTANT_P is false, we get better errors than we would
7030 otherwise. In the case that ALLOW_NON_CONSTANT_P is true, it is
7031 actually essential that we look for an assignment-expression.
7032 For example, cp_parser_initializer_clauses uses this function to
7033 determine whether a particular assignment-expression is in fact
7035 expression = cp_parser_assignment_expression (parser, /*cast_p=*/false, NULL);
7036 /* Restore the old settings. */
7037 parser->integral_constant_expression_p
7038 = saved_integral_constant_expression_p;
7039 parser->allow_non_integral_constant_expression_p
7040 = saved_allow_non_integral_constant_expression_p;
7041 if (cxx_dialect >= cxx0x)
7043 /* Require an rvalue constant expression here; that's what our
7044 callers expect. Reference constant expressions are handled
7045 separately in e.g. cp_parser_template_argument. */
7046 bool is_const = potential_rvalue_constant_expression (expression);
7047 parser->non_integral_constant_expression_p = !is_const;
7048 if (!is_const && !allow_non_constant_p)
7049 require_potential_rvalue_constant_expression (expression);
7051 if (allow_non_constant_p)
7052 *non_constant_p = parser->non_integral_constant_expression_p;
7053 else if (parser->non_integral_constant_expression_p)
7054 expression = error_mark_node;
7055 parser->non_integral_constant_expression_p
7056 = saved_non_integral_constant_expression_p;
7061 /* Parse __builtin_offsetof.
7063 offsetof-expression:
7064 "__builtin_offsetof" "(" type-id "," offsetof-member-designator ")"
7066 offsetof-member-designator:
7068 | offsetof-member-designator "." id-expression
7069 | offsetof-member-designator "[" expression "]"
7070 | offsetof-member-designator "->" id-expression */
7073 cp_parser_builtin_offsetof (cp_parser *parser)
7075 int save_ice_p, save_non_ice_p;
7080 /* We're about to accept non-integral-constant things, but will
7081 definitely yield an integral constant expression. Save and
7082 restore these values around our local parsing. */
7083 save_ice_p = parser->integral_constant_expression_p;
7084 save_non_ice_p = parser->non_integral_constant_expression_p;
7086 /* Consume the "__builtin_offsetof" token. */
7087 cp_lexer_consume_token (parser->lexer);
7088 /* Consume the opening `('. */
7089 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
7090 /* Parse the type-id. */
7091 type = cp_parser_type_id (parser);
7092 /* Look for the `,'. */
7093 cp_parser_require (parser, CPP_COMMA, RT_COMMA);
7094 token = cp_lexer_peek_token (parser->lexer);
7096 /* Build the (type *)null that begins the traditional offsetof macro. */
7097 expr = build_static_cast (build_pointer_type (type), null_pointer_node,
7098 tf_warning_or_error);
7100 /* Parse the offsetof-member-designator. We begin as if we saw "expr->". */
7101 expr = cp_parser_postfix_dot_deref_expression (parser, CPP_DEREF, expr,
7102 true, &dummy, token->location);
7105 token = cp_lexer_peek_token (parser->lexer);
7106 switch (token->type)
7108 case CPP_OPEN_SQUARE:
7109 /* offsetof-member-designator "[" expression "]" */
7110 expr = cp_parser_postfix_open_square_expression (parser, expr, true);
7114 /* offsetof-member-designator "->" identifier */
7115 expr = grok_array_decl (expr, integer_zero_node);
7119 /* offsetof-member-designator "." identifier */
7120 cp_lexer_consume_token (parser->lexer);
7121 expr = cp_parser_postfix_dot_deref_expression (parser, CPP_DOT,
7126 case CPP_CLOSE_PAREN:
7127 /* Consume the ")" token. */
7128 cp_lexer_consume_token (parser->lexer);
7132 /* Error. We know the following require will fail, but
7133 that gives the proper error message. */
7134 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
7135 cp_parser_skip_to_closing_parenthesis (parser, true, false, true);
7136 expr = error_mark_node;
7142 /* If we're processing a template, we can't finish the semantics yet.
7143 Otherwise we can fold the entire expression now. */
7144 if (processing_template_decl)
7145 expr = build1 (OFFSETOF_EXPR, size_type_node, expr);
7147 expr = finish_offsetof (expr);
7150 parser->integral_constant_expression_p = save_ice_p;
7151 parser->non_integral_constant_expression_p = save_non_ice_p;
7156 /* Parse a trait expression.
7158 Returns a representation of the expression, the underlying type
7159 of the type at issue when KEYWORD is RID_UNDERLYING_TYPE. */
7162 cp_parser_trait_expr (cp_parser* parser, enum rid keyword)
7165 tree type1, type2 = NULL_TREE;
7166 bool binary = false;
7167 cp_decl_specifier_seq decl_specs;
7171 case RID_HAS_NOTHROW_ASSIGN:
7172 kind = CPTK_HAS_NOTHROW_ASSIGN;
7174 case RID_HAS_NOTHROW_CONSTRUCTOR:
7175 kind = CPTK_HAS_NOTHROW_CONSTRUCTOR;
7177 case RID_HAS_NOTHROW_COPY:
7178 kind = CPTK_HAS_NOTHROW_COPY;
7180 case RID_HAS_TRIVIAL_ASSIGN:
7181 kind = CPTK_HAS_TRIVIAL_ASSIGN;
7183 case RID_HAS_TRIVIAL_CONSTRUCTOR:
7184 kind = CPTK_HAS_TRIVIAL_CONSTRUCTOR;
7186 case RID_HAS_TRIVIAL_COPY:
7187 kind = CPTK_HAS_TRIVIAL_COPY;
7189 case RID_HAS_TRIVIAL_DESTRUCTOR:
7190 kind = CPTK_HAS_TRIVIAL_DESTRUCTOR;
7192 case RID_HAS_VIRTUAL_DESTRUCTOR:
7193 kind = CPTK_HAS_VIRTUAL_DESTRUCTOR;
7195 case RID_IS_ABSTRACT:
7196 kind = CPTK_IS_ABSTRACT;
7198 case RID_IS_BASE_OF:
7199 kind = CPTK_IS_BASE_OF;
7203 kind = CPTK_IS_CLASS;
7205 case RID_IS_CONVERTIBLE_TO:
7206 kind = CPTK_IS_CONVERTIBLE_TO;
7210 kind = CPTK_IS_EMPTY;
7213 kind = CPTK_IS_ENUM;
7215 case RID_IS_LITERAL_TYPE:
7216 kind = CPTK_IS_LITERAL_TYPE;
7221 case RID_IS_POLYMORPHIC:
7222 kind = CPTK_IS_POLYMORPHIC;
7224 case RID_IS_STD_LAYOUT:
7225 kind = CPTK_IS_STD_LAYOUT;
7227 case RID_IS_TRIVIAL:
7228 kind = CPTK_IS_TRIVIAL;
7231 kind = CPTK_IS_UNION;
7233 case RID_UNDERLYING_TYPE:
7234 kind = CPTK_UNDERLYING_TYPE;
7240 /* Consume the token. */
7241 cp_lexer_consume_token (parser->lexer);
7243 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
7245 type1 = cp_parser_type_id (parser);
7247 if (type1 == error_mark_node)
7248 return error_mark_node;
7250 /* Build a trivial decl-specifier-seq. */
7251 clear_decl_specs (&decl_specs);
7252 decl_specs.type = type1;
7254 /* Call grokdeclarator to figure out what type this is. */
7255 type1 = grokdeclarator (NULL, &decl_specs, TYPENAME,
7256 /*initialized=*/0, /*attrlist=*/NULL);
7260 cp_parser_require (parser, CPP_COMMA, RT_COMMA);
7262 type2 = cp_parser_type_id (parser);
7264 if (type2 == error_mark_node)
7265 return error_mark_node;
7267 /* Build a trivial decl-specifier-seq. */
7268 clear_decl_specs (&decl_specs);
7269 decl_specs.type = type2;
7271 /* Call grokdeclarator to figure out what type this is. */
7272 type2 = grokdeclarator (NULL, &decl_specs, TYPENAME,
7273 /*initialized=*/0, /*attrlist=*/NULL);
7276 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
7278 /* Complete the trait expression, which may mean either processing
7279 the trait expr now or saving it for template instantiation. */
7280 return kind != CPTK_UNDERLYING_TYPE
7281 ? finish_trait_expr (kind, type1, type2)
7282 : finish_underlying_type (type1);
7285 /* Lambdas that appear in variable initializer or default argument scope
7286 get that in their mangling, so we need to record it. We might as well
7287 use the count for function and namespace scopes as well. */
7288 static GTY(()) tree lambda_scope;
7289 static GTY(()) int lambda_count;
7290 typedef struct GTY(()) tree_int
7295 DEF_VEC_O(tree_int);
7296 DEF_VEC_ALLOC_O(tree_int,gc);
7297 static GTY(()) VEC(tree_int,gc) *lambda_scope_stack;
7300 start_lambda_scope (tree decl)
7304 /* Once we're inside a function, we ignore other scopes and just push
7305 the function again so that popping works properly. */
7306 if (current_function_decl && TREE_CODE (decl) != FUNCTION_DECL)
7307 decl = current_function_decl;
7308 ti.t = lambda_scope;
7309 ti.i = lambda_count;
7310 VEC_safe_push (tree_int, gc, lambda_scope_stack, &ti);
7311 if (lambda_scope != decl)
7313 /* Don't reset the count if we're still in the same function. */
7314 lambda_scope = decl;
7320 record_lambda_scope (tree lambda)
7322 LAMBDA_EXPR_EXTRA_SCOPE (lambda) = lambda_scope;
7323 LAMBDA_EXPR_DISCRIMINATOR (lambda) = lambda_count++;
7327 finish_lambda_scope (void)
7329 tree_int *p = VEC_last (tree_int, lambda_scope_stack);
7330 if (lambda_scope != p->t)
7332 lambda_scope = p->t;
7333 lambda_count = p->i;
7335 VEC_pop (tree_int, lambda_scope_stack);
7338 /* Parse a lambda expression.
7341 lambda-introducer lambda-declarator [opt] compound-statement
7343 Returns a representation of the expression. */
7346 cp_parser_lambda_expression (cp_parser* parser)
7348 tree lambda_expr = build_lambda_expr ();
7352 LAMBDA_EXPR_LOCATION (lambda_expr)
7353 = cp_lexer_peek_token (parser->lexer)->location;
7355 if (cp_unevaluated_operand)
7356 error_at (LAMBDA_EXPR_LOCATION (lambda_expr),
7357 "lambda-expression in unevaluated context");
7359 /* We may be in the middle of deferred access check. Disable
7361 push_deferring_access_checks (dk_no_deferred);
7363 cp_parser_lambda_introducer (parser, lambda_expr);
7365 type = begin_lambda_type (lambda_expr);
7367 record_lambda_scope (lambda_expr);
7369 /* Do this again now that LAMBDA_EXPR_EXTRA_SCOPE is set. */
7370 determine_visibility (TYPE_NAME (type));
7372 /* Now that we've started the type, add the capture fields for any
7373 explicit captures. */
7374 register_capture_members (LAMBDA_EXPR_CAPTURE_LIST (lambda_expr));
7377 /* Inside the class, surrounding template-parameter-lists do not apply. */
7378 unsigned int saved_num_template_parameter_lists
7379 = parser->num_template_parameter_lists;
7381 parser->num_template_parameter_lists = 0;
7383 /* By virtue of defining a local class, a lambda expression has access to
7384 the private variables of enclosing classes. */
7386 ok = cp_parser_lambda_declarator_opt (parser, lambda_expr);
7389 cp_parser_lambda_body (parser, lambda_expr);
7390 else if (cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE))
7391 cp_parser_skip_to_end_of_block_or_statement (parser);
7393 /* The capture list was built up in reverse order; fix that now. */
7395 tree newlist = NULL_TREE;
7398 for (elt = LAMBDA_EXPR_CAPTURE_LIST (lambda_expr);
7401 tree field = TREE_PURPOSE (elt);
7404 next = TREE_CHAIN (elt);
7405 TREE_CHAIN (elt) = newlist;
7408 /* Also add __ to the beginning of the field name so that code
7409 outside the lambda body can't see the captured name. We could
7410 just remove the name entirely, but this is more useful for
7412 if (field == LAMBDA_EXPR_THIS_CAPTURE (lambda_expr))
7413 /* The 'this' capture already starts with __. */
7416 buf = (char *) alloca (IDENTIFIER_LENGTH (DECL_NAME (field)) + 3);
7417 buf[1] = buf[0] = '_';
7418 memcpy (buf + 2, IDENTIFIER_POINTER (DECL_NAME (field)),
7419 IDENTIFIER_LENGTH (DECL_NAME (field)) + 1);
7420 DECL_NAME (field) = get_identifier (buf);
7422 LAMBDA_EXPR_CAPTURE_LIST (lambda_expr) = newlist;
7426 maybe_add_lambda_conv_op (type);
7428 type = finish_struct (type, /*attributes=*/NULL_TREE);
7430 parser->num_template_parameter_lists = saved_num_template_parameter_lists;
7433 pop_deferring_access_checks ();
7436 return build_lambda_object (lambda_expr);
7438 return error_mark_node;
7441 /* Parse the beginning of a lambda expression.
7444 [ lambda-capture [opt] ]
7446 LAMBDA_EXPR is the current representation of the lambda expression. */
7449 cp_parser_lambda_introducer (cp_parser* parser, tree lambda_expr)
7451 /* Need commas after the first capture. */
7454 /* Eat the leading `['. */
7455 cp_parser_require (parser, CPP_OPEN_SQUARE, RT_OPEN_SQUARE);
7457 /* Record default capture mode. "[&" "[=" "[&," "[=," */
7458 if (cp_lexer_next_token_is (parser->lexer, CPP_AND)
7459 && cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_NAME)
7460 LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr) = CPLD_REFERENCE;
7461 else if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
7462 LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr) = CPLD_COPY;
7464 if (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr) != CPLD_NONE)
7466 cp_lexer_consume_token (parser->lexer);
7470 while (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_SQUARE))
7472 cp_token* capture_token;
7474 tree capture_init_expr;
7475 cp_id_kind idk = CP_ID_KIND_NONE;
7476 bool explicit_init_p = false;
7478 enum capture_kind_type
7483 enum capture_kind_type capture_kind = BY_COPY;
7485 if (cp_lexer_next_token_is (parser->lexer, CPP_EOF))
7487 error ("expected end of capture-list");
7494 cp_parser_require (parser, CPP_COMMA, RT_COMMA);
7496 /* Possibly capture `this'. */
7497 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_THIS))
7499 cp_lexer_consume_token (parser->lexer);
7500 add_capture (lambda_expr,
7501 /*id=*/get_identifier ("__this"),
7502 /*initializer=*/finish_this_expr(),
7503 /*by_reference_p=*/false,
7508 /* Remember whether we want to capture as a reference or not. */
7509 if (cp_lexer_next_token_is (parser->lexer, CPP_AND))
7511 capture_kind = BY_REFERENCE;
7512 cp_lexer_consume_token (parser->lexer);
7515 /* Get the identifier. */
7516 capture_token = cp_lexer_peek_token (parser->lexer);
7517 capture_id = cp_parser_identifier (parser);
7519 if (capture_id == error_mark_node)
7520 /* Would be nice to have a cp_parser_skip_to_closing_x for general
7521 delimiters, but I modified this to stop on unnested ']' as well. It
7522 was already changed to stop on unnested '}', so the
7523 "closing_parenthesis" name is no more misleading with my change. */
7525 cp_parser_skip_to_closing_parenthesis (parser,
7526 /*recovering=*/true,
7528 /*consume_paren=*/true);
7532 /* Find the initializer for this capture. */
7533 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
7535 /* An explicit expression exists. */
7536 cp_lexer_consume_token (parser->lexer);
7537 pedwarn (input_location, OPT_pedantic,
7538 "ISO C++ does not allow initializers "
7539 "in lambda expression capture lists");
7540 capture_init_expr = cp_parser_assignment_expression (parser,
7543 explicit_init_p = true;
7547 const char* error_msg;
7549 /* Turn the identifier into an id-expression. */
7551 = cp_parser_lookup_name
7555 /*is_template=*/false,
7556 /*is_namespace=*/false,
7557 /*check_dependency=*/true,
7558 /*ambiguous_decls=*/NULL,
7559 capture_token->location);
7562 = finish_id_expression
7567 /*integral_constant_expression_p=*/false,
7568 /*allow_non_integral_constant_expression_p=*/false,
7569 /*non_integral_constant_expression_p=*/NULL,
7570 /*template_p=*/false,
7572 /*address_p=*/false,
7573 /*template_arg_p=*/false,
7575 capture_token->location);
7578 if (TREE_CODE (capture_init_expr) == IDENTIFIER_NODE)
7580 = unqualified_name_lookup_error (capture_init_expr);
7582 add_capture (lambda_expr,
7585 /*by_reference_p=*/capture_kind == BY_REFERENCE,
7589 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
7592 /* Parse the (optional) middle of a lambda expression.
7595 ( parameter-declaration-clause [opt] )
7596 attribute-specifier [opt]
7598 exception-specification [opt]
7599 lambda-return-type-clause [opt]
7601 LAMBDA_EXPR is the current representation of the lambda expression. */
7604 cp_parser_lambda_declarator_opt (cp_parser* parser, tree lambda_expr)
7606 /* 5.1.1.4 of the standard says:
7607 If a lambda-expression does not include a lambda-declarator, it is as if
7608 the lambda-declarator were ().
7609 This means an empty parameter list, no attributes, and no exception
7611 tree param_list = void_list_node;
7612 tree attributes = NULL_TREE;
7613 tree exception_spec = NULL_TREE;
7616 /* The lambda-declarator is optional, but must begin with an opening
7617 parenthesis if present. */
7618 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
7620 cp_lexer_consume_token (parser->lexer);
7622 begin_scope (sk_function_parms, /*entity=*/NULL_TREE);
7624 /* Parse parameters. */
7625 param_list = cp_parser_parameter_declaration_clause (parser);
7627 /* Default arguments shall not be specified in the
7628 parameter-declaration-clause of a lambda-declarator. */
7629 for (t = param_list; t; t = TREE_CHAIN (t))
7630 if (TREE_PURPOSE (t))
7631 pedwarn (DECL_SOURCE_LOCATION (TREE_VALUE (t)), OPT_pedantic,
7632 "default argument specified for lambda parameter");
7634 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
7636 attributes = cp_parser_attributes_opt (parser);
7638 /* Parse optional `mutable' keyword. */
7639 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_MUTABLE))
7641 cp_lexer_consume_token (parser->lexer);
7642 LAMBDA_EXPR_MUTABLE_P (lambda_expr) = 1;
7645 /* Parse optional exception specification. */
7646 exception_spec = cp_parser_exception_specification_opt (parser);
7648 /* Parse optional trailing return type. */
7649 if (cp_lexer_next_token_is (parser->lexer, CPP_DEREF))
7651 cp_lexer_consume_token (parser->lexer);
7652 LAMBDA_EXPR_RETURN_TYPE (lambda_expr) = cp_parser_type_id (parser);
7655 /* The function parameters must be in scope all the way until after the
7656 trailing-return-type in case of decltype. */
7657 for (t = current_binding_level->names; t; t = DECL_CHAIN (t))
7658 pop_binding (DECL_NAME (t), t);
7663 /* Create the function call operator.
7665 Messing with declarators like this is no uglier than building up the
7666 FUNCTION_DECL by hand, and this is less likely to get out of sync with
7669 cp_decl_specifier_seq return_type_specs;
7670 cp_declarator* declarator;
7675 clear_decl_specs (&return_type_specs);
7676 if (LAMBDA_EXPR_RETURN_TYPE (lambda_expr))
7677 return_type_specs.type = LAMBDA_EXPR_RETURN_TYPE (lambda_expr);
7679 /* Maybe we will deduce the return type later, but we can use void
7680 as a placeholder return type anyways. */
7681 return_type_specs.type = void_type_node;
7683 p = obstack_alloc (&declarator_obstack, 0);
7685 declarator = make_id_declarator (NULL_TREE, ansi_opname (CALL_EXPR),
7688 quals = (LAMBDA_EXPR_MUTABLE_P (lambda_expr)
7689 ? TYPE_UNQUALIFIED : TYPE_QUAL_CONST);
7690 declarator = make_call_declarator (declarator, param_list, quals,
7691 VIRT_SPEC_UNSPECIFIED,
7693 /*late_return_type=*/NULL_TREE);
7694 declarator->id_loc = LAMBDA_EXPR_LOCATION (lambda_expr);
7696 fco = grokmethod (&return_type_specs,
7699 if (fco != error_mark_node)
7701 DECL_INITIALIZED_IN_CLASS_P (fco) = 1;
7702 DECL_ARTIFICIAL (fco) = 1;
7705 finish_member_declaration (fco);
7707 obstack_free (&declarator_obstack, p);
7709 return (fco != error_mark_node);
7713 /* Parse the body of a lambda expression, which is simply
7717 but which requires special handling.
7718 LAMBDA_EXPR is the current representation of the lambda expression. */
7721 cp_parser_lambda_body (cp_parser* parser, tree lambda_expr)
7723 bool nested = (current_function_decl != NULL_TREE);
7725 push_function_context ();
7727 /* Finish the function call operator
7729 + late_parsing_for_member
7730 + function_definition_after_declarator
7731 + ctor_initializer_opt_and_function_body */
7733 tree fco = lambda_function (lambda_expr);
7737 /* Let the front end know that we are going to be defining this
7739 start_preparsed_function (fco,
7741 SF_PRE_PARSED | SF_INCLASS_INLINE);
7743 start_lambda_scope (fco);
7744 body = begin_function_body ();
7746 /* 5.1.1.4 of the standard says:
7747 If a lambda-expression does not include a trailing-return-type, it
7748 is as if the trailing-return-type denotes the following type:
7749 * if the compound-statement is of the form
7750 { return attribute-specifier [opt] expression ; }
7751 the type of the returned expression after lvalue-to-rvalue
7752 conversion (_conv.lval_ 4.1), array-to-pointer conversion
7753 (_conv.array_ 4.2), and function-to-pointer conversion
7755 * otherwise, void. */
7757 /* In a lambda that has neither a lambda-return-type-clause
7758 nor a deducible form, errors should be reported for return statements
7759 in the body. Since we used void as the placeholder return type, parsing
7760 the body as usual will give such desired behavior. */
7761 if (!LAMBDA_EXPR_RETURN_TYPE (lambda_expr)
7762 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE)
7763 && cp_lexer_peek_nth_token (parser->lexer, 2)->keyword == RID_RETURN
7764 && cp_lexer_peek_nth_token (parser->lexer, 3)->type != CPP_SEMICOLON)
7767 tree expr = NULL_TREE;
7768 cp_id_kind idk = CP_ID_KIND_NONE;
7770 /* Parse tentatively in case there's more after the initial return
7772 cp_parser_parse_tentatively (parser);
7774 cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE);
7775 cp_parser_require_keyword (parser, RID_RETURN, RT_RETURN);
7777 expr = cp_parser_expression (parser, /*cast_p=*/false, &idk);
7779 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
7780 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
7782 if (cp_parser_parse_definitely (parser))
7784 apply_lambda_return_type (lambda_expr, lambda_return_type (expr));
7786 compound_stmt = begin_compound_stmt (0);
7787 /* Will get error here if type not deduced yet. */
7788 finish_return_stmt (expr);
7789 finish_compound_stmt (compound_stmt);
7797 if (!LAMBDA_EXPR_RETURN_TYPE (lambda_expr))
7798 LAMBDA_EXPR_DEDUCE_RETURN_TYPE_P (lambda_expr) = true;
7799 /* TODO: does begin_compound_stmt want BCS_FN_BODY?
7800 cp_parser_compound_stmt does not pass it. */
7801 cp_parser_function_body (parser);
7802 LAMBDA_EXPR_DEDUCE_RETURN_TYPE_P (lambda_expr) = false;
7805 finish_function_body (body);
7806 finish_lambda_scope ();
7808 /* Finish the function and generate code for it if necessary. */
7809 expand_or_defer_fn (finish_function (/*inline*/2));
7813 pop_function_context();
7816 /* Statements [gram.stmt.stmt] */
7818 /* Parse a statement.
7822 expression-statement
7827 declaration-statement
7830 IN_COMPOUND is true when the statement is nested inside a
7831 cp_parser_compound_statement; this matters for certain pragmas.
7833 If IF_P is not NULL, *IF_P is set to indicate whether the statement
7834 is a (possibly labeled) if statement which is not enclosed in braces
7835 and has an else clause. This is used to implement -Wparentheses. */
7838 cp_parser_statement (cp_parser* parser, tree in_statement_expr,
7839 bool in_compound, bool *if_p)
7843 location_t statement_location;
7848 /* There is no statement yet. */
7849 statement = NULL_TREE;
7850 /* Peek at the next token. */
7851 token = cp_lexer_peek_token (parser->lexer);
7852 /* Remember the location of the first token in the statement. */
7853 statement_location = token->location;
7854 /* If this is a keyword, then that will often determine what kind of
7855 statement we have. */
7856 if (token->type == CPP_KEYWORD)
7858 enum rid keyword = token->keyword;
7864 /* Looks like a labeled-statement with a case label.
7865 Parse the label, and then use tail recursion to parse
7867 cp_parser_label_for_labeled_statement (parser);
7872 statement = cp_parser_selection_statement (parser, if_p);
7878 statement = cp_parser_iteration_statement (parser);
7885 statement = cp_parser_jump_statement (parser);
7888 /* Objective-C++ exception-handling constructs. */
7891 case RID_AT_FINALLY:
7892 case RID_AT_SYNCHRONIZED:
7894 statement = cp_parser_objc_statement (parser);
7898 statement = cp_parser_try_block (parser);
7902 /* This must be a namespace alias definition. */
7903 cp_parser_declaration_statement (parser);
7907 /* It might be a keyword like `int' that can start a
7908 declaration-statement. */
7912 else if (token->type == CPP_NAME)
7914 /* If the next token is a `:', then we are looking at a
7915 labeled-statement. */
7916 token = cp_lexer_peek_nth_token (parser->lexer, 2);
7917 if (token->type == CPP_COLON)
7919 /* Looks like a labeled-statement with an ordinary label.
7920 Parse the label, and then use tail recursion to parse
7922 cp_parser_label_for_labeled_statement (parser);
7926 /* Anything that starts with a `{' must be a compound-statement. */
7927 else if (token->type == CPP_OPEN_BRACE)
7928 statement = cp_parser_compound_statement (parser, NULL, false, false);
7929 /* CPP_PRAGMA is a #pragma inside a function body, which constitutes
7930 a statement all its own. */
7931 else if (token->type == CPP_PRAGMA)
7933 /* Only certain OpenMP pragmas are attached to statements, and thus
7934 are considered statements themselves. All others are not. In
7935 the context of a compound, accept the pragma as a "statement" and
7936 return so that we can check for a close brace. Otherwise we
7937 require a real statement and must go back and read one. */
7939 cp_parser_pragma (parser, pragma_compound);
7940 else if (!cp_parser_pragma (parser, pragma_stmt))
7944 else if (token->type == CPP_EOF)
7946 cp_parser_error (parser, "expected statement");
7950 /* Everything else must be a declaration-statement or an
7951 expression-statement. Try for the declaration-statement
7952 first, unless we are looking at a `;', in which case we know that
7953 we have an expression-statement. */
7956 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
7958 cp_parser_parse_tentatively (parser);
7959 /* Try to parse the declaration-statement. */
7960 cp_parser_declaration_statement (parser);
7961 /* If that worked, we're done. */
7962 if (cp_parser_parse_definitely (parser))
7965 /* Look for an expression-statement instead. */
7966 statement = cp_parser_expression_statement (parser, in_statement_expr);
7969 /* Set the line number for the statement. */
7970 if (statement && STATEMENT_CODE_P (TREE_CODE (statement)))
7971 SET_EXPR_LOCATION (statement, statement_location);
7974 /* Parse the label for a labeled-statement, i.e.
7977 case constant-expression :
7981 case constant-expression ... constant-expression : statement
7983 When a label is parsed without errors, the label is added to the
7984 parse tree by the finish_* functions, so this function doesn't
7985 have to return the label. */
7988 cp_parser_label_for_labeled_statement (cp_parser* parser)
7991 tree label = NULL_TREE;
7992 bool saved_colon_corrects_to_scope_p = parser->colon_corrects_to_scope_p;
7994 /* The next token should be an identifier. */
7995 token = cp_lexer_peek_token (parser->lexer);
7996 if (token->type != CPP_NAME
7997 && token->type != CPP_KEYWORD)
7999 cp_parser_error (parser, "expected labeled-statement");
8003 parser->colon_corrects_to_scope_p = false;
8004 switch (token->keyword)
8011 /* Consume the `case' token. */
8012 cp_lexer_consume_token (parser->lexer);
8013 /* Parse the constant-expression. */
8014 expr = cp_parser_constant_expression (parser,
8015 /*allow_non_constant_p=*/false,
8018 ellipsis = cp_lexer_peek_token (parser->lexer);
8019 if (ellipsis->type == CPP_ELLIPSIS)
8021 /* Consume the `...' token. */
8022 cp_lexer_consume_token (parser->lexer);
8024 cp_parser_constant_expression (parser,
8025 /*allow_non_constant_p=*/false,
8027 /* We don't need to emit warnings here, as the common code
8028 will do this for us. */
8031 expr_hi = NULL_TREE;
8033 if (parser->in_switch_statement_p)
8034 finish_case_label (token->location, expr, expr_hi);
8036 error_at (token->location,
8037 "case label %qE not within a switch statement",
8043 /* Consume the `default' token. */
8044 cp_lexer_consume_token (parser->lexer);
8046 if (parser->in_switch_statement_p)
8047 finish_case_label (token->location, NULL_TREE, NULL_TREE);
8049 error_at (token->location, "case label not within a switch statement");
8053 /* Anything else must be an ordinary label. */
8054 label = finish_label_stmt (cp_parser_identifier (parser));
8058 /* Require the `:' token. */
8059 cp_parser_require (parser, CPP_COLON, RT_COLON);
8061 /* An ordinary label may optionally be followed by attributes.
8062 However, this is only permitted if the attributes are then
8063 followed by a semicolon. This is because, for backward
8064 compatibility, when parsing
8065 lab: __attribute__ ((unused)) int i;
8066 we want the attribute to attach to "i", not "lab". */
8067 if (label != NULL_TREE
8068 && cp_lexer_next_token_is_keyword (parser->lexer, RID_ATTRIBUTE))
8072 cp_parser_parse_tentatively (parser);
8073 attrs = cp_parser_attributes_opt (parser);
8074 if (attrs == NULL_TREE
8075 || cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
8076 cp_parser_abort_tentative_parse (parser);
8077 else if (!cp_parser_parse_definitely (parser))
8080 cplus_decl_attributes (&label, attrs, 0);
8083 parser->colon_corrects_to_scope_p = saved_colon_corrects_to_scope_p;
8086 /* Parse an expression-statement.
8088 expression-statement:
8091 Returns the new EXPR_STMT -- or NULL_TREE if the expression
8092 statement consists of nothing more than an `;'. IN_STATEMENT_EXPR_P
8093 indicates whether this expression-statement is part of an
8094 expression statement. */
8097 cp_parser_expression_statement (cp_parser* parser, tree in_statement_expr)
8099 tree statement = NULL_TREE;
8100 cp_token *token = cp_lexer_peek_token (parser->lexer);
8102 /* If the next token is a ';', then there is no expression
8104 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
8105 statement = cp_parser_expression (parser, /*cast_p=*/false, NULL);
8107 /* Give a helpful message for "A<T>::type t;" and the like. */
8108 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON)
8109 && !cp_parser_uncommitted_to_tentative_parse_p (parser))
8111 if (TREE_CODE (statement) == SCOPE_REF)
8112 error_at (token->location, "need %<typename%> before %qE because "
8113 "%qT is a dependent scope",
8114 statement, TREE_OPERAND (statement, 0));
8115 else if (is_overloaded_fn (statement)
8116 && DECL_CONSTRUCTOR_P (get_first_fn (statement)))
8119 tree fn = get_first_fn (statement);
8120 error_at (token->location,
8121 "%<%T::%D%> names the constructor, not the type",
8122 DECL_CONTEXT (fn), DECL_NAME (fn));
8126 /* Consume the final `;'. */
8127 cp_parser_consume_semicolon_at_end_of_statement (parser);
8129 if (in_statement_expr
8130 && cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
8131 /* This is the final expression statement of a statement
8133 statement = finish_stmt_expr_expr (statement, in_statement_expr);
8135 statement = finish_expr_stmt (statement);
8142 /* Parse a compound-statement.
8145 { statement-seq [opt] }
8150 { label-declaration-seq [opt] statement-seq [opt] }
8152 label-declaration-seq:
8154 label-declaration-seq label-declaration
8156 Returns a tree representing the statement. */
8159 cp_parser_compound_statement (cp_parser *parser, tree in_statement_expr,
8160 bool in_try, bool function_body)
8164 /* Consume the `{'. */
8165 if (!cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE))
8166 return error_mark_node;
8167 if (DECL_DECLARED_CONSTEXPR_P (current_function_decl)
8169 pedwarn (input_location, OPT_pedantic,
8170 "compound-statement in constexpr function");
8171 /* Begin the compound-statement. */
8172 compound_stmt = begin_compound_stmt (in_try ? BCS_TRY_BLOCK : 0);
8173 /* If the next keyword is `__label__' we have a label declaration. */
8174 while (cp_lexer_next_token_is_keyword (parser->lexer, RID_LABEL))
8175 cp_parser_label_declaration (parser);
8176 /* Parse an (optional) statement-seq. */
8177 cp_parser_statement_seq_opt (parser, in_statement_expr);
8178 /* Finish the compound-statement. */
8179 finish_compound_stmt (compound_stmt);
8180 /* Consume the `}'. */
8181 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
8183 return compound_stmt;
8186 /* Parse an (optional) statement-seq.
8190 statement-seq [opt] statement */
8193 cp_parser_statement_seq_opt (cp_parser* parser, tree in_statement_expr)
8195 /* Scan statements until there aren't any more. */
8198 cp_token *token = cp_lexer_peek_token (parser->lexer);
8200 /* If we are looking at a `}', then we have run out of
8201 statements; the same is true if we have reached the end
8202 of file, or have stumbled upon a stray '@end'. */
8203 if (token->type == CPP_CLOSE_BRACE
8204 || token->type == CPP_EOF
8205 || token->type == CPP_PRAGMA_EOL
8206 || (token->type == CPP_KEYWORD && token->keyword == RID_AT_END))
8209 /* If we are in a compound statement and find 'else' then
8210 something went wrong. */
8211 else if (token->type == CPP_KEYWORD && token->keyword == RID_ELSE)
8213 if (parser->in_statement & IN_IF_STMT)
8217 token = cp_lexer_consume_token (parser->lexer);
8218 error_at (token->location, "%<else%> without a previous %<if%>");
8222 /* Parse the statement. */
8223 cp_parser_statement (parser, in_statement_expr, true, NULL);
8227 /* Parse a selection-statement.
8229 selection-statement:
8230 if ( condition ) statement
8231 if ( condition ) statement else statement
8232 switch ( condition ) statement
8234 Returns the new IF_STMT or SWITCH_STMT.
8236 If IF_P is not NULL, *IF_P is set to indicate whether the statement
8237 is a (possibly labeled) if statement which is not enclosed in
8238 braces and has an else clause. This is used to implement
8242 cp_parser_selection_statement (cp_parser* parser, bool *if_p)
8250 /* Peek at the next token. */
8251 token = cp_parser_require (parser, CPP_KEYWORD, RT_SELECT);
8253 /* See what kind of keyword it is. */
8254 keyword = token->keyword;
8263 /* Look for the `('. */
8264 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
8266 cp_parser_skip_to_end_of_statement (parser);
8267 return error_mark_node;
8270 /* Begin the selection-statement. */
8271 if (keyword == RID_IF)
8272 statement = begin_if_stmt ();
8274 statement = begin_switch_stmt ();
8276 /* Parse the condition. */
8277 condition = cp_parser_condition (parser);
8278 /* Look for the `)'. */
8279 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
8280 cp_parser_skip_to_closing_parenthesis (parser, true, false,
8281 /*consume_paren=*/true);
8283 if (keyword == RID_IF)
8286 unsigned char in_statement;
8288 /* Add the condition. */
8289 finish_if_stmt_cond (condition, statement);
8291 /* Parse the then-clause. */
8292 in_statement = parser->in_statement;
8293 parser->in_statement |= IN_IF_STMT;
8294 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
8296 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
8297 add_stmt (build_empty_stmt (loc));
8298 cp_lexer_consume_token (parser->lexer);
8299 if (!cp_lexer_next_token_is_keyword (parser->lexer, RID_ELSE))
8300 warning_at (loc, OPT_Wempty_body, "suggest braces around "
8301 "empty body in an %<if%> statement");
8305 cp_parser_implicitly_scoped_statement (parser, &nested_if);
8306 parser->in_statement = in_statement;
8308 finish_then_clause (statement);
8310 /* If the next token is `else', parse the else-clause. */
8311 if (cp_lexer_next_token_is_keyword (parser->lexer,
8314 /* Consume the `else' keyword. */
8315 cp_lexer_consume_token (parser->lexer);
8316 begin_else_clause (statement);
8317 /* Parse the else-clause. */
8318 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
8321 loc = cp_lexer_peek_token (parser->lexer)->location;
8323 OPT_Wempty_body, "suggest braces around "
8324 "empty body in an %<else%> statement");
8325 add_stmt (build_empty_stmt (loc));
8326 cp_lexer_consume_token (parser->lexer);
8329 cp_parser_implicitly_scoped_statement (parser, NULL);
8331 finish_else_clause (statement);
8333 /* If we are currently parsing a then-clause, then
8334 IF_P will not be NULL. We set it to true to
8335 indicate that this if statement has an else clause.
8336 This may trigger the Wparentheses warning below
8337 when we get back up to the parent if statement. */
8343 /* This if statement does not have an else clause. If
8344 NESTED_IF is true, then the then-clause is an if
8345 statement which does have an else clause. We warn
8346 about the potential ambiguity. */
8348 warning_at (EXPR_LOCATION (statement), OPT_Wparentheses,
8349 "suggest explicit braces to avoid ambiguous"
8353 /* Now we're all done with the if-statement. */
8354 finish_if_stmt (statement);
8358 bool in_switch_statement_p;
8359 unsigned char in_statement;
8361 /* Add the condition. */
8362 finish_switch_cond (condition, statement);
8364 /* Parse the body of the switch-statement. */
8365 in_switch_statement_p = parser->in_switch_statement_p;
8366 in_statement = parser->in_statement;
8367 parser->in_switch_statement_p = true;
8368 parser->in_statement |= IN_SWITCH_STMT;
8369 cp_parser_implicitly_scoped_statement (parser, NULL);
8370 parser->in_switch_statement_p = in_switch_statement_p;
8371 parser->in_statement = in_statement;
8373 /* Now we're all done with the switch-statement. */
8374 finish_switch_stmt (statement);
8382 cp_parser_error (parser, "expected selection-statement");
8383 return error_mark_node;
8387 /* Parse a condition.
8391 type-specifier-seq declarator = initializer-clause
8392 type-specifier-seq declarator braced-init-list
8397 type-specifier-seq declarator asm-specification [opt]
8398 attributes [opt] = assignment-expression
8400 Returns the expression that should be tested. */
8403 cp_parser_condition (cp_parser* parser)
8405 cp_decl_specifier_seq type_specifiers;
8406 const char *saved_message;
8407 int declares_class_or_enum;
8409 /* Try the declaration first. */
8410 cp_parser_parse_tentatively (parser);
8411 /* New types are not allowed in the type-specifier-seq for a
8413 saved_message = parser->type_definition_forbidden_message;
8414 parser->type_definition_forbidden_message
8415 = G_("types may not be defined in conditions");
8416 /* Parse the type-specifier-seq. */
8417 cp_parser_decl_specifier_seq (parser,
8418 CP_PARSER_FLAGS_ONLY_TYPE_OR_CONSTEXPR,
8420 &declares_class_or_enum);
8421 /* Restore the saved message. */
8422 parser->type_definition_forbidden_message = saved_message;
8423 /* If all is well, we might be looking at a declaration. */
8424 if (!cp_parser_error_occurred (parser))
8427 tree asm_specification;
8429 cp_declarator *declarator;
8430 tree initializer = NULL_TREE;
8432 /* Parse the declarator. */
8433 declarator = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
8434 /*ctor_dtor_or_conv_p=*/NULL,
8435 /*parenthesized_p=*/NULL,
8436 /*member_p=*/false);
8437 /* Parse the attributes. */
8438 attributes = cp_parser_attributes_opt (parser);
8439 /* Parse the asm-specification. */
8440 asm_specification = cp_parser_asm_specification_opt (parser);
8441 /* If the next token is not an `=' or '{', then we might still be
8442 looking at an expression. For example:
8446 looks like a decl-specifier-seq and a declarator -- but then
8447 there is no `=', so this is an expression. */
8448 if (cp_lexer_next_token_is_not (parser->lexer, CPP_EQ)
8449 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE))
8450 cp_parser_simulate_error (parser);
8452 /* If we did see an `=' or '{', then we are looking at a declaration
8454 if (cp_parser_parse_definitely (parser))
8457 bool non_constant_p;
8458 bool flags = LOOKUP_ONLYCONVERTING;
8460 /* Create the declaration. */
8461 decl = start_decl (declarator, &type_specifiers,
8462 /*initialized_p=*/true,
8463 attributes, /*prefix_attributes=*/NULL_TREE,
8466 /* Parse the initializer. */
8467 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
8469 initializer = cp_parser_braced_list (parser, &non_constant_p);
8470 CONSTRUCTOR_IS_DIRECT_INIT (initializer) = 1;
8475 /* Consume the `='. */
8476 cp_parser_require (parser, CPP_EQ, RT_EQ);
8477 initializer = cp_parser_initializer_clause (parser, &non_constant_p);
8479 if (BRACE_ENCLOSED_INITIALIZER_P (initializer))
8480 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
8482 /* Process the initializer. */
8483 cp_finish_decl (decl,
8484 initializer, !non_constant_p,
8489 pop_scope (pushed_scope);
8491 return convert_from_reference (decl);
8494 /* If we didn't even get past the declarator successfully, we are
8495 definitely not looking at a declaration. */
8497 cp_parser_abort_tentative_parse (parser);
8499 /* Otherwise, we are looking at an expression. */
8500 return cp_parser_expression (parser, /*cast_p=*/false, NULL);
8503 /* Parses a for-statement or range-for-statement until the closing ')',
8507 cp_parser_for (cp_parser *parser)
8509 tree init, scope, decl;
8512 /* Begin the for-statement. */
8513 scope = begin_for_scope (&init);
8515 /* Parse the initialization. */
8516 is_range_for = cp_parser_for_init_statement (parser, &decl);
8519 return cp_parser_range_for (parser, scope, init, decl);
8521 return cp_parser_c_for (parser, scope, init);
8525 cp_parser_c_for (cp_parser *parser, tree scope, tree init)
8527 /* Normal for loop */
8528 tree condition = NULL_TREE;
8529 tree expression = NULL_TREE;
8532 stmt = begin_for_stmt (scope, init);
8533 /* The for-init-statement has already been parsed in
8534 cp_parser_for_init_statement, so no work is needed here. */
8535 finish_for_init_stmt (stmt);
8537 /* If there's a condition, process it. */
8538 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
8539 condition = cp_parser_condition (parser);
8540 finish_for_cond (condition, stmt);
8541 /* Look for the `;'. */
8542 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
8544 /* If there's an expression, process it. */
8545 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN))
8546 expression = cp_parser_expression (parser, /*cast_p=*/false, NULL);
8547 finish_for_expr (expression, stmt);
8552 /* Tries to parse a range-based for-statement:
8555 decl-specifier-seq declarator : expression
8557 The decl-specifier-seq declarator and the `:' are already parsed by
8558 cp_parser_for_init_statement. If processing_template_decl it returns a
8559 newly created RANGE_FOR_STMT; if not, it is converted to a
8560 regular FOR_STMT. */
8563 cp_parser_range_for (cp_parser *parser, tree scope, tree init, tree range_decl)
8565 tree stmt, range_expr;
8567 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
8569 bool expr_non_constant_p;
8570 range_expr = cp_parser_braced_list (parser, &expr_non_constant_p);
8573 range_expr = cp_parser_expression (parser, /*cast_p=*/false, NULL);
8575 /* If in template, STMT is converted to a normal for-statement
8576 at instantiation. If not, it is done just ahead. */
8577 if (processing_template_decl)
8579 stmt = begin_range_for_stmt (scope, init);
8580 finish_range_for_decl (stmt, range_decl, range_expr);
8584 stmt = begin_for_stmt (scope, init);
8585 stmt = cp_convert_range_for (stmt, range_decl, range_expr);
8590 /* Converts a range-based for-statement into a normal
8591 for-statement, as per the definition.
8593 for (RANGE_DECL : RANGE_EXPR)
8596 should be equivalent to:
8599 auto &&__range = RANGE_EXPR;
8600 for (auto __begin = BEGIN_EXPR, end = END_EXPR;
8604 RANGE_DECL = *__begin;
8609 If RANGE_EXPR is an array:
8610 BEGIN_EXPR = __range
8611 END_EXPR = __range + ARRAY_SIZE(__range)
8612 Else if RANGE_EXPR has a member 'begin' or 'end':
8613 BEGIN_EXPR = __range.begin()
8614 END_EXPR = __range.end()
8616 BEGIN_EXPR = begin(__range)
8617 END_EXPR = end(__range);
8619 If __range has a member 'begin' but not 'end', or vice versa, we must
8620 still use the second alternative (it will surely fail, however).
8621 When calling begin()/end() in the third alternative we must use
8622 argument dependent lookup, but always considering 'std' as an associated
8626 cp_convert_range_for (tree statement, tree range_decl, tree range_expr)
8628 tree range_type, range_temp;
8630 tree iter_type, begin_expr, end_expr;
8631 tree condition, expression;
8633 if (range_decl == error_mark_node || range_expr == error_mark_node)
8634 /* If an error happened previously do nothing or else a lot of
8635 unhelpful errors would be issued. */
8636 begin_expr = end_expr = iter_type = error_mark_node;
8639 /* Find out the type deduced by the declaration
8640 `auto &&__range = range_expr'. */
8641 range_type = cp_build_reference_type (make_auto (), true);
8642 range_type = do_auto_deduction (range_type, range_expr,
8643 type_uses_auto (range_type));
8645 /* Create the __range variable. */
8646 range_temp = build_decl (input_location, VAR_DECL,
8647 get_identifier ("__for_range"), range_type);
8648 TREE_USED (range_temp) = 1;
8649 DECL_ARTIFICIAL (range_temp) = 1;
8650 pushdecl (range_temp);
8651 cp_finish_decl (range_temp, range_expr,
8652 /*is_constant_init*/false, NULL_TREE,
8653 LOOKUP_ONLYCONVERTING);
8655 range_temp = convert_from_reference (range_temp);
8656 iter_type = cp_parser_perform_range_for_lookup (range_temp,
8657 &begin_expr, &end_expr);
8660 /* The new for initialization statement. */
8661 begin = build_decl (input_location, VAR_DECL,
8662 get_identifier ("__for_begin"), iter_type);
8663 TREE_USED (begin) = 1;
8664 DECL_ARTIFICIAL (begin) = 1;
8666 cp_finish_decl (begin, begin_expr,
8667 /*is_constant_init*/false, NULL_TREE,
8668 LOOKUP_ONLYCONVERTING);
8670 end = build_decl (input_location, VAR_DECL,
8671 get_identifier ("__for_end"), iter_type);
8672 TREE_USED (end) = 1;
8673 DECL_ARTIFICIAL (end) = 1;
8675 cp_finish_decl (end, end_expr,
8676 /*is_constant_init*/false, NULL_TREE,
8677 LOOKUP_ONLYCONVERTING);
8679 finish_for_init_stmt (statement);
8681 /* The new for condition. */
8682 condition = build_x_binary_op (NE_EXPR,
8685 NULL, tf_warning_or_error);
8686 finish_for_cond (condition, statement);
8688 /* The new increment expression. */
8689 expression = finish_unary_op_expr (PREINCREMENT_EXPR, begin);
8690 finish_for_expr (expression, statement);
8692 /* The declaration is initialized with *__begin inside the loop body. */
8693 cp_finish_decl (range_decl,
8694 build_x_indirect_ref (begin, RO_NULL, tf_warning_or_error),
8695 /*is_constant_init*/false, NULL_TREE,
8696 LOOKUP_ONLYCONVERTING);
8701 /* Solves BEGIN_EXPR and END_EXPR as described in cp_convert_range_for.
8702 We need to solve both at the same time because the method used
8703 depends on the existence of members begin or end.
8704 Returns the type deduced for the iterator expression. */
8707 cp_parser_perform_range_for_lookup (tree range, tree *begin, tree *end)
8709 if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (range))))
8711 error ("range-based %<for%> expression of type %qT "
8712 "has incomplete type", TREE_TYPE (range));
8713 *begin = *end = error_mark_node;
8714 return error_mark_node;
8716 if (TREE_CODE (TREE_TYPE (range)) == ARRAY_TYPE)
8718 /* If RANGE is an array, we will use pointer arithmetic. */
8720 *end = build_binary_op (input_location, PLUS_EXPR,
8722 array_type_nelts_top (TREE_TYPE (range)),
8724 return build_pointer_type (TREE_TYPE (TREE_TYPE (range)));
8728 /* If it is not an array, we must do a bit of magic. */
8729 tree id_begin, id_end;
8730 tree member_begin, member_end;
8732 *begin = *end = error_mark_node;
8734 id_begin = get_identifier ("begin");
8735 id_end = get_identifier ("end");
8736 member_begin = lookup_member (TREE_TYPE (range), id_begin,
8737 /*protect=*/2, /*want_type=*/false);
8738 member_end = lookup_member (TREE_TYPE (range), id_end,
8739 /*protect=*/2, /*want_type=*/false);
8741 if (member_begin != NULL_TREE || member_end != NULL_TREE)
8743 /* Use the member functions. */
8744 if (member_begin != NULL_TREE)
8745 *begin = cp_parser_range_for_member_function (range, id_begin);
8747 error ("range-based %<for%> expression of type %qT has an "
8748 "%<end%> member but not a %<begin%>", TREE_TYPE (range));
8750 if (member_end != NULL_TREE)
8751 *end = cp_parser_range_for_member_function (range, id_end);
8753 error ("range-based %<for%> expression of type %qT has a "
8754 "%<begin%> member but not an %<end%>", TREE_TYPE (range));
8758 /* Use global functions with ADL. */
8760 vec = make_tree_vector ();
8762 VEC_safe_push (tree, gc, vec, range);
8764 member_begin = perform_koenig_lookup (id_begin, vec,
8765 /*include_std=*/true,
8766 tf_warning_or_error);
8767 *begin = finish_call_expr (member_begin, &vec, false, true,
8768 tf_warning_or_error);
8769 member_end = perform_koenig_lookup (id_end, vec,
8770 /*include_std=*/true,
8771 tf_warning_or_error);
8772 *end = finish_call_expr (member_end, &vec, false, true,
8773 tf_warning_or_error);
8775 release_tree_vector (vec);
8778 /* Last common checks. */
8779 if (*begin == error_mark_node || *end == error_mark_node)
8781 /* If one of the expressions is an error do no more checks. */
8782 *begin = *end = error_mark_node;
8783 return error_mark_node;
8787 tree iter_type = cv_unqualified (TREE_TYPE (*begin));
8788 /* The unqualified type of the __begin and __end temporaries should
8789 be the same, as required by the multiple auto declaration. */
8790 if (!same_type_p (iter_type, cv_unqualified (TREE_TYPE (*end))))
8791 error ("inconsistent begin/end types in range-based %<for%> "
8792 "statement: %qT and %qT",
8793 TREE_TYPE (*begin), TREE_TYPE (*end));
8799 /* Helper function for cp_parser_perform_range_for_lookup.
8800 Builds a tree for RANGE.IDENTIFIER(). */
8803 cp_parser_range_for_member_function (tree range, tree identifier)
8808 member = finish_class_member_access_expr (range, identifier,
8809 false, tf_warning_or_error);
8810 if (member == error_mark_node)
8811 return error_mark_node;
8813 vec = make_tree_vector ();
8814 res = finish_call_expr (member, &vec,
8815 /*disallow_virtual=*/false,
8817 tf_warning_or_error);
8818 release_tree_vector (vec);
8822 /* Parse an iteration-statement.
8824 iteration-statement:
8825 while ( condition ) statement
8826 do statement while ( expression ) ;
8827 for ( for-init-statement condition [opt] ; expression [opt] )
8830 Returns the new WHILE_STMT, DO_STMT, FOR_STMT or RANGE_FOR_STMT. */
8833 cp_parser_iteration_statement (cp_parser* parser)
8838 unsigned char in_statement;
8840 /* Peek at the next token. */
8841 token = cp_parser_require (parser, CPP_KEYWORD, RT_INTERATION);
8843 return error_mark_node;
8845 /* Remember whether or not we are already within an iteration
8847 in_statement = parser->in_statement;
8849 /* See what kind of keyword it is. */
8850 keyword = token->keyword;
8857 /* Begin the while-statement. */
8858 statement = begin_while_stmt ();
8859 /* Look for the `('. */
8860 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
8861 /* Parse the condition. */
8862 condition = cp_parser_condition (parser);
8863 finish_while_stmt_cond (condition, statement);
8864 /* Look for the `)'. */
8865 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
8866 /* Parse the dependent statement. */
8867 parser->in_statement = IN_ITERATION_STMT;
8868 cp_parser_already_scoped_statement (parser);
8869 parser->in_statement = in_statement;
8870 /* We're done with the while-statement. */
8871 finish_while_stmt (statement);
8879 /* Begin the do-statement. */
8880 statement = begin_do_stmt ();
8881 /* Parse the body of the do-statement. */
8882 parser->in_statement = IN_ITERATION_STMT;
8883 cp_parser_implicitly_scoped_statement (parser, NULL);
8884 parser->in_statement = in_statement;
8885 finish_do_body (statement);
8886 /* Look for the `while' keyword. */
8887 cp_parser_require_keyword (parser, RID_WHILE, RT_WHILE);
8888 /* Look for the `('. */
8889 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
8890 /* Parse the expression. */
8891 expression = cp_parser_expression (parser, /*cast_p=*/false, NULL);
8892 /* We're done with the do-statement. */
8893 finish_do_stmt (expression, statement);
8894 /* Look for the `)'. */
8895 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
8896 /* Look for the `;'. */
8897 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
8903 /* Look for the `('. */
8904 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
8906 statement = cp_parser_for (parser);
8908 /* Look for the `)'. */
8909 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
8911 /* Parse the body of the for-statement. */
8912 parser->in_statement = IN_ITERATION_STMT;
8913 cp_parser_already_scoped_statement (parser);
8914 parser->in_statement = in_statement;
8916 /* We're done with the for-statement. */
8917 finish_for_stmt (statement);
8922 cp_parser_error (parser, "expected iteration-statement");
8923 statement = error_mark_node;
8930 /* Parse a for-init-statement or the declarator of a range-based-for.
8931 Returns true if a range-based-for declaration is seen.
8934 expression-statement
8935 simple-declaration */
8938 cp_parser_for_init_statement (cp_parser* parser, tree *decl)
8940 /* If the next token is a `;', then we have an empty
8941 expression-statement. Grammatically, this is also a
8942 simple-declaration, but an invalid one, because it does not
8943 declare anything. Therefore, if we did not handle this case
8944 specially, we would issue an error message about an invalid
8946 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
8948 bool is_range_for = false;
8949 bool saved_colon_corrects_to_scope_p = parser->colon_corrects_to_scope_p;
8951 parser->colon_corrects_to_scope_p = false;
8953 /* We're going to speculatively look for a declaration, falling back
8954 to an expression, if necessary. */
8955 cp_parser_parse_tentatively (parser);
8956 /* Parse the declaration. */
8957 cp_parser_simple_declaration (parser,
8958 /*function_definition_allowed_p=*/false,
8960 parser->colon_corrects_to_scope_p = saved_colon_corrects_to_scope_p;
8961 if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
8963 /* It is a range-for, consume the ':' */
8964 cp_lexer_consume_token (parser->lexer);
8965 is_range_for = true;
8966 if (cxx_dialect < cxx0x)
8968 error_at (cp_lexer_peek_token (parser->lexer)->location,
8969 "range-based %<for%> loops are not allowed "
8971 *decl = error_mark_node;
8975 /* The ';' is not consumed yet because we told
8976 cp_parser_simple_declaration not to. */
8977 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
8979 if (cp_parser_parse_definitely (parser))
8980 return is_range_for;
8981 /* If the tentative parse failed, then we shall need to look for an
8982 expression-statement. */
8984 /* If we are here, it is an expression-statement. */
8985 cp_parser_expression_statement (parser, NULL_TREE);
8989 /* Parse a jump-statement.
8994 return expression [opt] ;
8995 return braced-init-list ;
9003 Returns the new BREAK_STMT, CONTINUE_STMT, RETURN_EXPR, or GOTO_EXPR. */
9006 cp_parser_jump_statement (cp_parser* parser)
9008 tree statement = error_mark_node;
9011 unsigned char in_statement;
9013 /* Peek at the next token. */
9014 token = cp_parser_require (parser, CPP_KEYWORD, RT_JUMP);
9016 return error_mark_node;
9018 /* See what kind of keyword it is. */
9019 keyword = token->keyword;
9023 in_statement = parser->in_statement & ~IN_IF_STMT;
9024 switch (in_statement)
9027 error_at (token->location, "break statement not within loop or switch");
9030 gcc_assert ((in_statement & IN_SWITCH_STMT)
9031 || in_statement == IN_ITERATION_STMT);
9032 statement = finish_break_stmt ();
9035 error_at (token->location, "invalid exit from OpenMP structured block");
9038 error_at (token->location, "break statement used with OpenMP for loop");
9041 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
9045 switch (parser->in_statement & ~(IN_SWITCH_STMT | IN_IF_STMT))
9048 error_at (token->location, "continue statement not within a loop");
9050 case IN_ITERATION_STMT:
9052 statement = finish_continue_stmt ();
9055 error_at (token->location, "invalid exit from OpenMP structured block");
9060 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
9066 bool expr_non_constant_p;
9068 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
9070 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
9071 expr = cp_parser_braced_list (parser, &expr_non_constant_p);
9073 else if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
9074 expr = cp_parser_expression (parser, /*cast_p=*/false, NULL);
9076 /* If the next token is a `;', then there is no
9079 /* Build the return-statement. */
9080 statement = finish_return_stmt (expr);
9081 /* Look for the final `;'. */
9082 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
9087 /* Create the goto-statement. */
9088 if (cp_lexer_next_token_is (parser->lexer, CPP_MULT))
9090 /* Issue a warning about this use of a GNU extension. */
9091 pedwarn (token->location, OPT_pedantic, "ISO C++ forbids computed gotos");
9092 /* Consume the '*' token. */
9093 cp_lexer_consume_token (parser->lexer);
9094 /* Parse the dependent expression. */
9095 finish_goto_stmt (cp_parser_expression (parser, /*cast_p=*/false, NULL));
9098 finish_goto_stmt (cp_parser_identifier (parser));
9099 /* Look for the final `;'. */
9100 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
9104 cp_parser_error (parser, "expected jump-statement");
9111 /* Parse a declaration-statement.
9113 declaration-statement:
9114 block-declaration */
9117 cp_parser_declaration_statement (cp_parser* parser)
9121 /* Get the high-water mark for the DECLARATOR_OBSTACK. */
9122 p = obstack_alloc (&declarator_obstack, 0);
9124 /* Parse the block-declaration. */
9125 cp_parser_block_declaration (parser, /*statement_p=*/true);
9127 /* Free any declarators allocated. */
9128 obstack_free (&declarator_obstack, p);
9130 /* Finish off the statement. */
9134 /* Some dependent statements (like `if (cond) statement'), are
9135 implicitly in their own scope. In other words, if the statement is
9136 a single statement (as opposed to a compound-statement), it is
9137 none-the-less treated as if it were enclosed in braces. Any
9138 declarations appearing in the dependent statement are out of scope
9139 after control passes that point. This function parses a statement,
9140 but ensures that is in its own scope, even if it is not a
9143 If IF_P is not NULL, *IF_P is set to indicate whether the statement
9144 is a (possibly labeled) if statement which is not enclosed in
9145 braces and has an else clause. This is used to implement
9148 Returns the new statement. */
9151 cp_parser_implicitly_scoped_statement (cp_parser* parser, bool *if_p)
9158 /* Mark if () ; with a special NOP_EXPR. */
9159 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
9161 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
9162 cp_lexer_consume_token (parser->lexer);
9163 statement = add_stmt (build_empty_stmt (loc));
9165 /* if a compound is opened, we simply parse the statement directly. */
9166 else if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
9167 statement = cp_parser_compound_statement (parser, NULL, false, false);
9168 /* If the token is not a `{', then we must take special action. */
9171 /* Create a compound-statement. */
9172 statement = begin_compound_stmt (0);
9173 /* Parse the dependent-statement. */
9174 cp_parser_statement (parser, NULL_TREE, false, if_p);
9175 /* Finish the dummy compound-statement. */
9176 finish_compound_stmt (statement);
9179 /* Return the statement. */
9183 /* For some dependent statements (like `while (cond) statement'), we
9184 have already created a scope. Therefore, even if the dependent
9185 statement is a compound-statement, we do not want to create another
9189 cp_parser_already_scoped_statement (cp_parser* parser)
9191 /* If the token is a `{', then we must take special action. */
9192 if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE))
9193 cp_parser_statement (parser, NULL_TREE, false, NULL);
9196 /* Avoid calling cp_parser_compound_statement, so that we
9197 don't create a new scope. Do everything else by hand. */
9198 cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE);
9199 /* If the next keyword is `__label__' we have a label declaration. */
9200 while (cp_lexer_next_token_is_keyword (parser->lexer, RID_LABEL))
9201 cp_parser_label_declaration (parser);
9202 /* Parse an (optional) statement-seq. */
9203 cp_parser_statement_seq_opt (parser, NULL_TREE);
9204 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
9208 /* Declarations [gram.dcl.dcl] */
9210 /* Parse an optional declaration-sequence.
9214 declaration-seq declaration */
9217 cp_parser_declaration_seq_opt (cp_parser* parser)
9223 token = cp_lexer_peek_token (parser->lexer);
9225 if (token->type == CPP_CLOSE_BRACE
9226 || token->type == CPP_EOF
9227 || token->type == CPP_PRAGMA_EOL)
9230 if (token->type == CPP_SEMICOLON)
9232 /* A declaration consisting of a single semicolon is
9233 invalid. Allow it unless we're being pedantic. */
9234 cp_lexer_consume_token (parser->lexer);
9235 if (!in_system_header)
9236 pedwarn (input_location, OPT_pedantic, "extra %<;%>");
9240 /* If we're entering or exiting a region that's implicitly
9241 extern "C", modify the lang context appropriately. */
9242 if (!parser->implicit_extern_c && token->implicit_extern_c)
9244 push_lang_context (lang_name_c);
9245 parser->implicit_extern_c = true;
9247 else if (parser->implicit_extern_c && !token->implicit_extern_c)
9249 pop_lang_context ();
9250 parser->implicit_extern_c = false;
9253 if (token->type == CPP_PRAGMA)
9255 /* A top-level declaration can consist solely of a #pragma.
9256 A nested declaration cannot, so this is done here and not
9257 in cp_parser_declaration. (A #pragma at block scope is
9258 handled in cp_parser_statement.) */
9259 cp_parser_pragma (parser, pragma_external);
9263 /* Parse the declaration itself. */
9264 cp_parser_declaration (parser);
9268 /* Parse a declaration.
9273 template-declaration
9274 explicit-instantiation
9275 explicit-specialization
9276 linkage-specification
9277 namespace-definition
9282 __extension__ declaration */
9285 cp_parser_declaration (cp_parser* parser)
9291 tree attributes = NULL_TREE;
9293 /* Check for the `__extension__' keyword. */
9294 if (cp_parser_extension_opt (parser, &saved_pedantic))
9296 /* Parse the qualified declaration. */
9297 cp_parser_declaration (parser);
9298 /* Restore the PEDANTIC flag. */
9299 pedantic = saved_pedantic;
9304 /* Try to figure out what kind of declaration is present. */
9305 token1 = *cp_lexer_peek_token (parser->lexer);
9307 if (token1.type != CPP_EOF)
9308 token2 = *cp_lexer_peek_nth_token (parser->lexer, 2);
9311 token2.type = CPP_EOF;
9312 token2.keyword = RID_MAX;
9315 /* Get the high-water mark for the DECLARATOR_OBSTACK. */
9316 p = obstack_alloc (&declarator_obstack, 0);
9318 /* If the next token is `extern' and the following token is a string
9319 literal, then we have a linkage specification. */
9320 if (token1.keyword == RID_EXTERN
9321 && cp_parser_is_string_literal (&token2))
9322 cp_parser_linkage_specification (parser);
9323 /* If the next token is `template', then we have either a template
9324 declaration, an explicit instantiation, or an explicit
9326 else if (token1.keyword == RID_TEMPLATE)
9328 /* `template <>' indicates a template specialization. */
9329 if (token2.type == CPP_LESS
9330 && cp_lexer_peek_nth_token (parser->lexer, 3)->type == CPP_GREATER)
9331 cp_parser_explicit_specialization (parser);
9332 /* `template <' indicates a template declaration. */
9333 else if (token2.type == CPP_LESS)
9334 cp_parser_template_declaration (parser, /*member_p=*/false);
9335 /* Anything else must be an explicit instantiation. */
9337 cp_parser_explicit_instantiation (parser);
9339 /* If the next token is `export', then we have a template
9341 else if (token1.keyword == RID_EXPORT)
9342 cp_parser_template_declaration (parser, /*member_p=*/false);
9343 /* If the next token is `extern', 'static' or 'inline' and the one
9344 after that is `template', we have a GNU extended explicit
9345 instantiation directive. */
9346 else if (cp_parser_allow_gnu_extensions_p (parser)
9347 && (token1.keyword == RID_EXTERN
9348 || token1.keyword == RID_STATIC
9349 || token1.keyword == RID_INLINE)
9350 && token2.keyword == RID_TEMPLATE)
9351 cp_parser_explicit_instantiation (parser);
9352 /* If the next token is `namespace', check for a named or unnamed
9353 namespace definition. */
9354 else if (token1.keyword == RID_NAMESPACE
9355 && (/* A named namespace definition. */
9356 (token2.type == CPP_NAME
9357 && (cp_lexer_peek_nth_token (parser->lexer, 3)->type
9359 /* An unnamed namespace definition. */
9360 || token2.type == CPP_OPEN_BRACE
9361 || token2.keyword == RID_ATTRIBUTE))
9362 cp_parser_namespace_definition (parser);
9363 /* An inline (associated) namespace definition. */
9364 else if (token1.keyword == RID_INLINE
9365 && token2.keyword == RID_NAMESPACE)
9366 cp_parser_namespace_definition (parser);
9367 /* Objective-C++ declaration/definition. */
9368 else if (c_dialect_objc () && OBJC_IS_AT_KEYWORD (token1.keyword))
9369 cp_parser_objc_declaration (parser, NULL_TREE);
9370 else if (c_dialect_objc ()
9371 && token1.keyword == RID_ATTRIBUTE
9372 && cp_parser_objc_valid_prefix_attributes (parser, &attributes))
9373 cp_parser_objc_declaration (parser, attributes);
9374 /* We must have either a block declaration or a function
9377 /* Try to parse a block-declaration, or a function-definition. */
9378 cp_parser_block_declaration (parser, /*statement_p=*/false);
9380 /* Free any declarators allocated. */
9381 obstack_free (&declarator_obstack, p);
9384 /* Parse a block-declaration.
9389 namespace-alias-definition
9396 __extension__ block-declaration
9401 static_assert-declaration
9403 If STATEMENT_P is TRUE, then this block-declaration is occurring as
9404 part of a declaration-statement. */
9407 cp_parser_block_declaration (cp_parser *parser,
9413 /* Check for the `__extension__' keyword. */
9414 if (cp_parser_extension_opt (parser, &saved_pedantic))
9416 /* Parse the qualified declaration. */
9417 cp_parser_block_declaration (parser, statement_p);
9418 /* Restore the PEDANTIC flag. */
9419 pedantic = saved_pedantic;
9424 /* Peek at the next token to figure out which kind of declaration is
9426 token1 = cp_lexer_peek_token (parser->lexer);
9428 /* If the next keyword is `asm', we have an asm-definition. */
9429 if (token1->keyword == RID_ASM)
9432 cp_parser_commit_to_tentative_parse (parser);
9433 cp_parser_asm_definition (parser);
9435 /* If the next keyword is `namespace', we have a
9436 namespace-alias-definition. */
9437 else if (token1->keyword == RID_NAMESPACE)
9438 cp_parser_namespace_alias_definition (parser);
9439 /* If the next keyword is `using', we have either a
9440 using-declaration or a using-directive. */
9441 else if (token1->keyword == RID_USING)
9446 cp_parser_commit_to_tentative_parse (parser);
9447 /* If the token after `using' is `namespace', then we have a
9449 token2 = cp_lexer_peek_nth_token (parser->lexer, 2);
9450 if (token2->keyword == RID_NAMESPACE)
9451 cp_parser_using_directive (parser);
9452 /* Otherwise, it's a using-declaration. */
9454 cp_parser_using_declaration (parser,
9455 /*access_declaration_p=*/false);
9457 /* If the next keyword is `__label__' we have a misplaced label
9459 else if (token1->keyword == RID_LABEL)
9461 cp_lexer_consume_token (parser->lexer);
9462 error_at (token1->location, "%<__label__%> not at the beginning of a block");
9463 cp_parser_skip_to_end_of_statement (parser);
9464 /* If the next token is now a `;', consume it. */
9465 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
9466 cp_lexer_consume_token (parser->lexer);
9468 /* If the next token is `static_assert' we have a static assertion. */
9469 else if (token1->keyword == RID_STATIC_ASSERT)
9470 cp_parser_static_assert (parser, /*member_p=*/false);
9471 /* Anything else must be a simple-declaration. */
9473 cp_parser_simple_declaration (parser, !statement_p,
9474 /*maybe_range_for_decl*/NULL);
9477 /* Parse a simple-declaration.
9480 decl-specifier-seq [opt] init-declarator-list [opt] ;
9482 init-declarator-list:
9484 init-declarator-list , init-declarator
9486 If FUNCTION_DEFINITION_ALLOWED_P is TRUE, then we also recognize a
9487 function-definition as a simple-declaration.
9489 If MAYBE_RANGE_FOR_DECL is not NULL, the pointed tree will be set to the
9490 parsed declaration if it is an uninitialized single declarator not followed
9491 by a `;', or to error_mark_node otherwise. Either way, the trailing `;',
9492 if present, will not be consumed. */
9495 cp_parser_simple_declaration (cp_parser* parser,
9496 bool function_definition_allowed_p,
9497 tree *maybe_range_for_decl)
9499 cp_decl_specifier_seq decl_specifiers;
9500 int declares_class_or_enum;
9501 bool saw_declarator;
9503 if (maybe_range_for_decl)
9504 *maybe_range_for_decl = NULL_TREE;
9506 /* Defer access checks until we know what is being declared; the
9507 checks for names appearing in the decl-specifier-seq should be
9508 done as if we were in the scope of the thing being declared. */
9509 push_deferring_access_checks (dk_deferred);
9511 /* Parse the decl-specifier-seq. We have to keep track of whether
9512 or not the decl-specifier-seq declares a named class or
9513 enumeration type, since that is the only case in which the
9514 init-declarator-list is allowed to be empty.
9518 In a simple-declaration, the optional init-declarator-list can be
9519 omitted only when declaring a class or enumeration, that is when
9520 the decl-specifier-seq contains either a class-specifier, an
9521 elaborated-type-specifier, or an enum-specifier. */
9522 cp_parser_decl_specifier_seq (parser,
9523 CP_PARSER_FLAGS_OPTIONAL,
9525 &declares_class_or_enum);
9526 /* We no longer need to defer access checks. */
9527 stop_deferring_access_checks ();
9529 /* In a block scope, a valid declaration must always have a
9530 decl-specifier-seq. By not trying to parse declarators, we can
9531 resolve the declaration/expression ambiguity more quickly. */
9532 if (!function_definition_allowed_p
9533 && !decl_specifiers.any_specifiers_p)
9535 cp_parser_error (parser, "expected declaration");
9539 /* If the next two tokens are both identifiers, the code is
9540 erroneous. The usual cause of this situation is code like:
9544 where "T" should name a type -- but does not. */
9545 if (!decl_specifiers.any_type_specifiers_p
9546 && cp_parser_parse_and_diagnose_invalid_type_name (parser))
9548 /* If parsing tentatively, we should commit; we really are
9549 looking at a declaration. */
9550 cp_parser_commit_to_tentative_parse (parser);
9555 /* If we have seen at least one decl-specifier, and the next token
9556 is not a parenthesis, then we must be looking at a declaration.
9557 (After "int (" we might be looking at a functional cast.) */
9558 if (decl_specifiers.any_specifiers_p
9559 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_PAREN)
9560 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE)
9561 && !cp_parser_error_occurred (parser))
9562 cp_parser_commit_to_tentative_parse (parser);
9564 /* Keep going until we hit the `;' at the end of the simple
9566 saw_declarator = false;
9567 while (cp_lexer_next_token_is_not (parser->lexer,
9571 bool function_definition_p;
9576 /* If we are processing next declarator, coma is expected */
9577 token = cp_lexer_peek_token (parser->lexer);
9578 gcc_assert (token->type == CPP_COMMA);
9579 cp_lexer_consume_token (parser->lexer);
9580 if (maybe_range_for_decl)
9581 *maybe_range_for_decl = error_mark_node;
9584 saw_declarator = true;
9586 /* Parse the init-declarator. */
9587 decl = cp_parser_init_declarator (parser, &decl_specifiers,
9589 function_definition_allowed_p,
9591 declares_class_or_enum,
9592 &function_definition_p,
9593 maybe_range_for_decl);
9594 /* If an error occurred while parsing tentatively, exit quickly.
9595 (That usually happens when in the body of a function; each
9596 statement is treated as a declaration-statement until proven
9598 if (cp_parser_error_occurred (parser))
9600 /* Handle function definitions specially. */
9601 if (function_definition_p)
9603 /* If the next token is a `,', then we are probably
9604 processing something like:
9608 which is erroneous. */
9609 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
9611 cp_token *token = cp_lexer_peek_token (parser->lexer);
9612 error_at (token->location,
9614 " declarations and function-definitions is forbidden");
9616 /* Otherwise, we're done with the list of declarators. */
9619 pop_deferring_access_checks ();
9623 if (maybe_range_for_decl && *maybe_range_for_decl == NULL_TREE)
9624 *maybe_range_for_decl = decl;
9625 /* The next token should be either a `,' or a `;'. */
9626 token = cp_lexer_peek_token (parser->lexer);
9627 /* If it's a `,', there are more declarators to come. */
9628 if (token->type == CPP_COMMA)
9629 /* will be consumed next time around */;
9630 /* If it's a `;', we are done. */
9631 else if (token->type == CPP_SEMICOLON || maybe_range_for_decl)
9633 /* Anything else is an error. */
9636 /* If we have already issued an error message we don't need
9637 to issue another one. */
9638 if (decl != error_mark_node
9639 || cp_parser_uncommitted_to_tentative_parse_p (parser))
9640 cp_parser_error (parser, "expected %<,%> or %<;%>");
9641 /* Skip tokens until we reach the end of the statement. */
9642 cp_parser_skip_to_end_of_statement (parser);
9643 /* If the next token is now a `;', consume it. */
9644 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
9645 cp_lexer_consume_token (parser->lexer);
9648 /* After the first time around, a function-definition is not
9649 allowed -- even if it was OK at first. For example:
9654 function_definition_allowed_p = false;
9657 /* Issue an error message if no declarators are present, and the
9658 decl-specifier-seq does not itself declare a class or
9660 if (!saw_declarator)
9662 if (cp_parser_declares_only_class_p (parser))
9663 shadow_tag (&decl_specifiers);
9664 /* Perform any deferred access checks. */
9665 perform_deferred_access_checks ();
9668 /* Consume the `;'. */
9669 if (!maybe_range_for_decl)
9670 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
9673 pop_deferring_access_checks ();
9676 /* Parse a decl-specifier-seq.
9679 decl-specifier-seq [opt] decl-specifier
9682 storage-class-specifier
9693 Set *DECL_SPECS to a representation of the decl-specifier-seq.
9695 The parser flags FLAGS is used to control type-specifier parsing.
9697 *DECLARES_CLASS_OR_ENUM is set to the bitwise or of the following
9700 1: one of the decl-specifiers is an elaborated-type-specifier
9701 (i.e., a type declaration)
9702 2: one of the decl-specifiers is an enum-specifier or a
9703 class-specifier (i.e., a type definition)
9708 cp_parser_decl_specifier_seq (cp_parser* parser,
9709 cp_parser_flags flags,
9710 cp_decl_specifier_seq *decl_specs,
9711 int* declares_class_or_enum)
9713 bool constructor_possible_p = !parser->in_declarator_p;
9714 cp_token *start_token = NULL;
9716 /* Clear DECL_SPECS. */
9717 clear_decl_specs (decl_specs);
9719 /* Assume no class or enumeration type is declared. */
9720 *declares_class_or_enum = 0;
9722 /* Keep reading specifiers until there are no more to read. */
9726 bool found_decl_spec;
9729 /* Peek at the next token. */
9730 token = cp_lexer_peek_token (parser->lexer);
9732 /* Save the first token of the decl spec list for error
9735 start_token = token;
9736 /* Handle attributes. */
9737 if (token->keyword == RID_ATTRIBUTE)
9739 /* Parse the attributes. */
9740 decl_specs->attributes
9741 = chainon (decl_specs->attributes,
9742 cp_parser_attributes_opt (parser));
9745 /* Assume we will find a decl-specifier keyword. */
9746 found_decl_spec = true;
9747 /* If the next token is an appropriate keyword, we can simply
9748 add it to the list. */
9749 switch (token->keyword)
9755 if (!at_class_scope_p ())
9757 error_at (token->location, "%<friend%> used outside of class");
9758 cp_lexer_purge_token (parser->lexer);
9762 ++decl_specs->specs[(int) ds_friend];
9763 /* Consume the token. */
9764 cp_lexer_consume_token (parser->lexer);
9769 ++decl_specs->specs[(int) ds_constexpr];
9770 cp_lexer_consume_token (parser->lexer);
9773 /* function-specifier:
9780 cp_parser_function_specifier_opt (parser, decl_specs);
9786 ++decl_specs->specs[(int) ds_typedef];
9787 /* Consume the token. */
9788 cp_lexer_consume_token (parser->lexer);
9789 /* A constructor declarator cannot appear in a typedef. */
9790 constructor_possible_p = false;
9791 /* The "typedef" keyword can only occur in a declaration; we
9792 may as well commit at this point. */
9793 cp_parser_commit_to_tentative_parse (parser);
9795 if (decl_specs->storage_class != sc_none)
9796 decl_specs->conflicting_specifiers_p = true;
9799 /* storage-class-specifier:
9809 if (cxx_dialect == cxx98)
9811 /* Consume the token. */
9812 cp_lexer_consume_token (parser->lexer);
9814 /* Complain about `auto' as a storage specifier, if
9815 we're complaining about C++0x compatibility. */
9816 warning_at (token->location, OPT_Wc__0x_compat, "%<auto%>"
9817 " will change meaning in C++0x; please remove it");
9819 /* Set the storage class anyway. */
9820 cp_parser_set_storage_class (parser, decl_specs, RID_AUTO,
9824 /* C++0x auto type-specifier. */
9825 found_decl_spec = false;
9832 /* Consume the token. */
9833 cp_lexer_consume_token (parser->lexer);
9834 cp_parser_set_storage_class (parser, decl_specs, token->keyword,
9838 /* Consume the token. */
9839 cp_lexer_consume_token (parser->lexer);
9840 ++decl_specs->specs[(int) ds_thread];
9844 /* We did not yet find a decl-specifier yet. */
9845 found_decl_spec = false;
9850 && (flags & CP_PARSER_FLAGS_ONLY_TYPE_OR_CONSTEXPR)
9851 && token->keyword != RID_CONSTEXPR)
9852 error ("decl-specifier invalid in condition");
9854 /* Constructors are a special case. The `S' in `S()' is not a
9855 decl-specifier; it is the beginning of the declarator. */
9858 && constructor_possible_p
9859 && (cp_parser_constructor_declarator_p
9860 (parser, decl_specs->specs[(int) ds_friend] != 0)));
9862 /* If we don't have a DECL_SPEC yet, then we must be looking at
9863 a type-specifier. */
9864 if (!found_decl_spec && !constructor_p)
9866 int decl_spec_declares_class_or_enum;
9867 bool is_cv_qualifier;
9871 = cp_parser_type_specifier (parser, flags,
9873 /*is_declaration=*/true,
9874 &decl_spec_declares_class_or_enum,
9876 *declares_class_or_enum |= decl_spec_declares_class_or_enum;
9878 /* If this type-specifier referenced a user-defined type
9879 (a typedef, class-name, etc.), then we can't allow any
9880 more such type-specifiers henceforth.
9884 The longest sequence of decl-specifiers that could
9885 possibly be a type name is taken as the
9886 decl-specifier-seq of a declaration. The sequence shall
9887 be self-consistent as described below.
9891 As a general rule, at most one type-specifier is allowed
9892 in the complete decl-specifier-seq of a declaration. The
9893 only exceptions are the following:
9895 -- const or volatile can be combined with any other
9898 -- signed or unsigned can be combined with char, long,
9906 void g (const int Pc);
9908 Here, Pc is *not* part of the decl-specifier seq; it's
9909 the declarator. Therefore, once we see a type-specifier
9910 (other than a cv-qualifier), we forbid any additional
9911 user-defined types. We *do* still allow things like `int
9912 int' to be considered a decl-specifier-seq, and issue the
9913 error message later. */
9914 if (type_spec && !is_cv_qualifier)
9915 flags |= CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES;
9916 /* A constructor declarator cannot follow a type-specifier. */
9919 constructor_possible_p = false;
9920 found_decl_spec = true;
9921 if (!is_cv_qualifier)
9922 decl_specs->any_type_specifiers_p = true;
9926 /* If we still do not have a DECL_SPEC, then there are no more
9928 if (!found_decl_spec)
9931 decl_specs->any_specifiers_p = true;
9932 /* After we see one decl-specifier, further decl-specifiers are
9934 flags |= CP_PARSER_FLAGS_OPTIONAL;
9937 cp_parser_check_decl_spec (decl_specs, start_token->location);
9939 /* Don't allow a friend specifier with a class definition. */
9940 if (decl_specs->specs[(int) ds_friend] != 0
9941 && (*declares_class_or_enum & 2))
9942 error_at (start_token->location,
9943 "class definition may not be declared a friend");
9946 /* Parse an (optional) storage-class-specifier.
9948 storage-class-specifier:
9957 storage-class-specifier:
9960 Returns an IDENTIFIER_NODE corresponding to the keyword used. */
9963 cp_parser_storage_class_specifier_opt (cp_parser* parser)
9965 switch (cp_lexer_peek_token (parser->lexer)->keyword)
9968 if (cxx_dialect != cxx98)
9970 /* Fall through for C++98. */
9977 /* Consume the token. */
9978 return cp_lexer_consume_token (parser->lexer)->u.value;
9985 /* Parse an (optional) function-specifier.
9992 Returns an IDENTIFIER_NODE corresponding to the keyword used.
9993 Updates DECL_SPECS, if it is non-NULL. */
9996 cp_parser_function_specifier_opt (cp_parser* parser,
9997 cp_decl_specifier_seq *decl_specs)
9999 cp_token *token = cp_lexer_peek_token (parser->lexer);
10000 switch (token->keyword)
10004 ++decl_specs->specs[(int) ds_inline];
10008 /* 14.5.2.3 [temp.mem]
10010 A member function template shall not be virtual. */
10011 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
10012 error_at (token->location, "templates may not be %<virtual%>");
10013 else if (decl_specs)
10014 ++decl_specs->specs[(int) ds_virtual];
10019 ++decl_specs->specs[(int) ds_explicit];
10026 /* Consume the token. */
10027 return cp_lexer_consume_token (parser->lexer)->u.value;
10030 /* Parse a linkage-specification.
10032 linkage-specification:
10033 extern string-literal { declaration-seq [opt] }
10034 extern string-literal declaration */
10037 cp_parser_linkage_specification (cp_parser* parser)
10041 /* Look for the `extern' keyword. */
10042 cp_parser_require_keyword (parser, RID_EXTERN, RT_EXTERN);
10044 /* Look for the string-literal. */
10045 linkage = cp_parser_string_literal (parser, false, false);
10047 /* Transform the literal into an identifier. If the literal is a
10048 wide-character string, or contains embedded NULs, then we can't
10049 handle it as the user wants. */
10050 if (strlen (TREE_STRING_POINTER (linkage))
10051 != (size_t) (TREE_STRING_LENGTH (linkage) - 1))
10053 cp_parser_error (parser, "invalid linkage-specification");
10054 /* Assume C++ linkage. */
10055 linkage = lang_name_cplusplus;
10058 linkage = get_identifier (TREE_STRING_POINTER (linkage));
10060 /* We're now using the new linkage. */
10061 push_lang_context (linkage);
10063 /* If the next token is a `{', then we're using the first
10065 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
10067 /* Consume the `{' token. */
10068 cp_lexer_consume_token (parser->lexer);
10069 /* Parse the declarations. */
10070 cp_parser_declaration_seq_opt (parser);
10071 /* Look for the closing `}'. */
10072 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
10074 /* Otherwise, there's just one declaration. */
10077 bool saved_in_unbraced_linkage_specification_p;
10079 saved_in_unbraced_linkage_specification_p
10080 = parser->in_unbraced_linkage_specification_p;
10081 parser->in_unbraced_linkage_specification_p = true;
10082 cp_parser_declaration (parser);
10083 parser->in_unbraced_linkage_specification_p
10084 = saved_in_unbraced_linkage_specification_p;
10087 /* We're done with the linkage-specification. */
10088 pop_lang_context ();
10091 /* Parse a static_assert-declaration.
10093 static_assert-declaration:
10094 static_assert ( constant-expression , string-literal ) ;
10096 If MEMBER_P, this static_assert is a class member. */
10099 cp_parser_static_assert(cp_parser *parser, bool member_p)
10104 location_t saved_loc;
10107 /* Peek at the `static_assert' token so we can keep track of exactly
10108 where the static assertion started. */
10109 token = cp_lexer_peek_token (parser->lexer);
10110 saved_loc = token->location;
10112 /* Look for the `static_assert' keyword. */
10113 if (!cp_parser_require_keyword (parser, RID_STATIC_ASSERT,
10117 /* We know we are in a static assertion; commit to any tentative
10119 if (cp_parser_parsing_tentatively (parser))
10120 cp_parser_commit_to_tentative_parse (parser);
10122 /* Parse the `(' starting the static assertion condition. */
10123 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
10125 /* Parse the constant-expression. Allow a non-constant expression
10126 here in order to give better diagnostics in finish_static_assert. */
10128 cp_parser_constant_expression (parser,
10129 /*allow_non_constant_p=*/true,
10130 /*non_constant_p=*/&dummy);
10132 /* Parse the separating `,'. */
10133 cp_parser_require (parser, CPP_COMMA, RT_COMMA);
10135 /* Parse the string-literal message. */
10136 message = cp_parser_string_literal (parser,
10137 /*translate=*/false,
10140 /* A `)' completes the static assertion. */
10141 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
10142 cp_parser_skip_to_closing_parenthesis (parser,
10143 /*recovering=*/true,
10144 /*or_comma=*/false,
10145 /*consume_paren=*/true);
10147 /* A semicolon terminates the declaration. */
10148 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
10150 /* Complete the static assertion, which may mean either processing
10151 the static assert now or saving it for template instantiation. */
10152 finish_static_assert (condition, message, saved_loc, member_p);
10155 /* Parse a `decltype' type. Returns the type.
10157 simple-type-specifier:
10158 decltype ( expression ) */
10161 cp_parser_decltype (cp_parser *parser)
10164 bool id_expression_or_member_access_p = false;
10165 const char *saved_message;
10166 bool saved_integral_constant_expression_p;
10167 bool saved_non_integral_constant_expression_p;
10168 cp_token *id_expr_start_token;
10170 /* Look for the `decltype' token. */
10171 if (!cp_parser_require_keyword (parser, RID_DECLTYPE, RT_DECLTYPE))
10172 return error_mark_node;
10174 /* Types cannot be defined in a `decltype' expression. Save away the
10176 saved_message = parser->type_definition_forbidden_message;
10178 /* And create the new one. */
10179 parser->type_definition_forbidden_message
10180 = G_("types may not be defined in %<decltype%> expressions");
10182 /* The restrictions on constant-expressions do not apply inside
10183 decltype expressions. */
10184 saved_integral_constant_expression_p
10185 = parser->integral_constant_expression_p;
10186 saved_non_integral_constant_expression_p
10187 = parser->non_integral_constant_expression_p;
10188 parser->integral_constant_expression_p = false;
10190 /* Do not actually evaluate the expression. */
10191 ++cp_unevaluated_operand;
10193 /* Do not warn about problems with the expression. */
10194 ++c_inhibit_evaluation_warnings;
10196 /* Parse the opening `('. */
10197 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
10198 return error_mark_node;
10200 /* First, try parsing an id-expression. */
10201 id_expr_start_token = cp_lexer_peek_token (parser->lexer);
10202 cp_parser_parse_tentatively (parser);
10203 expr = cp_parser_id_expression (parser,
10204 /*template_keyword_p=*/false,
10205 /*check_dependency_p=*/true,
10206 /*template_p=*/NULL,
10207 /*declarator_p=*/false,
10208 /*optional_p=*/false);
10210 if (!cp_parser_error_occurred (parser) && expr != error_mark_node)
10212 bool non_integral_constant_expression_p = false;
10213 tree id_expression = expr;
10215 const char *error_msg;
10217 if (TREE_CODE (expr) == IDENTIFIER_NODE)
10218 /* Lookup the name we got back from the id-expression. */
10219 expr = cp_parser_lookup_name (parser, expr,
10221 /*is_template=*/false,
10222 /*is_namespace=*/false,
10223 /*check_dependency=*/true,
10224 /*ambiguous_decls=*/NULL,
10225 id_expr_start_token->location);
10228 && expr != error_mark_node
10229 && TREE_CODE (expr) != TEMPLATE_ID_EXPR
10230 && TREE_CODE (expr) != TYPE_DECL
10231 && (TREE_CODE (expr) != BIT_NOT_EXPR
10232 || !TYPE_P (TREE_OPERAND (expr, 0)))
10233 && cp_lexer_peek_token (parser->lexer)->type == CPP_CLOSE_PAREN)
10235 /* Complete lookup of the id-expression. */
10236 expr = (finish_id_expression
10237 (id_expression, expr, parser->scope, &idk,
10238 /*integral_constant_expression_p=*/false,
10239 /*allow_non_integral_constant_expression_p=*/true,
10240 &non_integral_constant_expression_p,
10241 /*template_p=*/false,
10243 /*address_p=*/false,
10244 /*template_arg_p=*/false,
10246 id_expr_start_token->location));
10248 if (expr == error_mark_node)
10249 /* We found an id-expression, but it was something that we
10250 should not have found. This is an error, not something
10251 we can recover from, so note that we found an
10252 id-expression and we'll recover as gracefully as
10254 id_expression_or_member_access_p = true;
10258 && expr != error_mark_node
10259 && cp_lexer_peek_token (parser->lexer)->type == CPP_CLOSE_PAREN)
10260 /* We have an id-expression. */
10261 id_expression_or_member_access_p = true;
10264 if (!id_expression_or_member_access_p)
10266 /* Abort the id-expression parse. */
10267 cp_parser_abort_tentative_parse (parser);
10269 /* Parsing tentatively, again. */
10270 cp_parser_parse_tentatively (parser);
10272 /* Parse a class member access. */
10273 expr = cp_parser_postfix_expression (parser, /*address_p=*/false,
10275 /*member_access_only_p=*/true, NULL);
10278 && expr != error_mark_node
10279 && cp_lexer_peek_token (parser->lexer)->type == CPP_CLOSE_PAREN)
10280 /* We have an id-expression. */
10281 id_expression_or_member_access_p = true;
10284 if (id_expression_or_member_access_p)
10285 /* We have parsed the complete id-expression or member access. */
10286 cp_parser_parse_definitely (parser);
10289 bool saved_greater_than_is_operator_p;
10291 /* Abort our attempt to parse an id-expression or member access
10293 cp_parser_abort_tentative_parse (parser);
10295 /* Within a parenthesized expression, a `>' token is always
10296 the greater-than operator. */
10297 saved_greater_than_is_operator_p
10298 = parser->greater_than_is_operator_p;
10299 parser->greater_than_is_operator_p = true;
10301 /* Parse a full expression. */
10302 expr = cp_parser_expression (parser, /*cast_p=*/false, NULL);
10304 /* The `>' token might be the end of a template-id or
10305 template-parameter-list now. */
10306 parser->greater_than_is_operator_p
10307 = saved_greater_than_is_operator_p;
10310 /* Go back to evaluating expressions. */
10311 --cp_unevaluated_operand;
10312 --c_inhibit_evaluation_warnings;
10314 /* Restore the old message and the integral constant expression
10316 parser->type_definition_forbidden_message = saved_message;
10317 parser->integral_constant_expression_p
10318 = saved_integral_constant_expression_p;
10319 parser->non_integral_constant_expression_p
10320 = saved_non_integral_constant_expression_p;
10322 if (expr == error_mark_node)
10324 /* Skip everything up to the closing `)'. */
10325 cp_parser_skip_to_closing_parenthesis (parser, true, false,
10326 /*consume_paren=*/true);
10327 return error_mark_node;
10330 /* Parse to the closing `)'. */
10331 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
10333 cp_parser_skip_to_closing_parenthesis (parser, true, false,
10334 /*consume_paren=*/true);
10335 return error_mark_node;
10338 return finish_decltype_type (expr, id_expression_or_member_access_p,
10339 tf_warning_or_error);
10342 /* Special member functions [gram.special] */
10344 /* Parse a conversion-function-id.
10346 conversion-function-id:
10347 operator conversion-type-id
10349 Returns an IDENTIFIER_NODE representing the operator. */
10352 cp_parser_conversion_function_id (cp_parser* parser)
10356 tree saved_qualifying_scope;
10357 tree saved_object_scope;
10358 tree pushed_scope = NULL_TREE;
10360 /* Look for the `operator' token. */
10361 if (!cp_parser_require_keyword (parser, RID_OPERATOR, RT_OPERATOR))
10362 return error_mark_node;
10363 /* When we parse the conversion-type-id, the current scope will be
10364 reset. However, we need that information in able to look up the
10365 conversion function later, so we save it here. */
10366 saved_scope = parser->scope;
10367 saved_qualifying_scope = parser->qualifying_scope;
10368 saved_object_scope = parser->object_scope;
10369 /* We must enter the scope of the class so that the names of
10370 entities declared within the class are available in the
10371 conversion-type-id. For example, consider:
10378 S::operator I() { ... }
10380 In order to see that `I' is a type-name in the definition, we
10381 must be in the scope of `S'. */
10383 pushed_scope = push_scope (saved_scope);
10384 /* Parse the conversion-type-id. */
10385 type = cp_parser_conversion_type_id (parser);
10386 /* Leave the scope of the class, if any. */
10388 pop_scope (pushed_scope);
10389 /* Restore the saved scope. */
10390 parser->scope = saved_scope;
10391 parser->qualifying_scope = saved_qualifying_scope;
10392 parser->object_scope = saved_object_scope;
10393 /* If the TYPE is invalid, indicate failure. */
10394 if (type == error_mark_node)
10395 return error_mark_node;
10396 return mangle_conv_op_name_for_type (type);
10399 /* Parse a conversion-type-id:
10401 conversion-type-id:
10402 type-specifier-seq conversion-declarator [opt]
10404 Returns the TYPE specified. */
10407 cp_parser_conversion_type_id (cp_parser* parser)
10410 cp_decl_specifier_seq type_specifiers;
10411 cp_declarator *declarator;
10412 tree type_specified;
10414 /* Parse the attributes. */
10415 attributes = cp_parser_attributes_opt (parser);
10416 /* Parse the type-specifiers. */
10417 cp_parser_type_specifier_seq (parser, /*is_declaration=*/false,
10418 /*is_trailing_return=*/false,
10420 /* If that didn't work, stop. */
10421 if (type_specifiers.type == error_mark_node)
10422 return error_mark_node;
10423 /* Parse the conversion-declarator. */
10424 declarator = cp_parser_conversion_declarator_opt (parser);
10426 type_specified = grokdeclarator (declarator, &type_specifiers, TYPENAME,
10427 /*initialized=*/0, &attributes);
10429 cplus_decl_attributes (&type_specified, attributes, /*flags=*/0);
10431 /* Don't give this error when parsing tentatively. This happens to
10432 work because we always parse this definitively once. */
10433 if (! cp_parser_uncommitted_to_tentative_parse_p (parser)
10434 && type_uses_auto (type_specified))
10436 error ("invalid use of %<auto%> in conversion operator");
10437 return error_mark_node;
10440 return type_specified;
10443 /* Parse an (optional) conversion-declarator.
10445 conversion-declarator:
10446 ptr-operator conversion-declarator [opt]
10450 static cp_declarator *
10451 cp_parser_conversion_declarator_opt (cp_parser* parser)
10453 enum tree_code code;
10455 cp_cv_quals cv_quals;
10457 /* We don't know if there's a ptr-operator next, or not. */
10458 cp_parser_parse_tentatively (parser);
10459 /* Try the ptr-operator. */
10460 code = cp_parser_ptr_operator (parser, &class_type, &cv_quals);
10461 /* If it worked, look for more conversion-declarators. */
10462 if (cp_parser_parse_definitely (parser))
10464 cp_declarator *declarator;
10466 /* Parse another optional declarator. */
10467 declarator = cp_parser_conversion_declarator_opt (parser);
10469 return cp_parser_make_indirect_declarator
10470 (code, class_type, cv_quals, declarator);
10476 /* Parse an (optional) ctor-initializer.
10479 : mem-initializer-list
10481 Returns TRUE iff the ctor-initializer was actually present. */
10484 cp_parser_ctor_initializer_opt (cp_parser* parser)
10486 /* If the next token is not a `:', then there is no
10487 ctor-initializer. */
10488 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COLON))
10490 /* Do default initialization of any bases and members. */
10491 if (DECL_CONSTRUCTOR_P (current_function_decl))
10492 finish_mem_initializers (NULL_TREE);
10497 /* Consume the `:' token. */
10498 cp_lexer_consume_token (parser->lexer);
10499 /* And the mem-initializer-list. */
10500 cp_parser_mem_initializer_list (parser);
10505 /* Parse a mem-initializer-list.
10507 mem-initializer-list:
10508 mem-initializer ... [opt]
10509 mem-initializer ... [opt] , mem-initializer-list */
10512 cp_parser_mem_initializer_list (cp_parser* parser)
10514 tree mem_initializer_list = NULL_TREE;
10515 cp_token *token = cp_lexer_peek_token (parser->lexer);
10517 /* Let the semantic analysis code know that we are starting the
10518 mem-initializer-list. */
10519 if (!DECL_CONSTRUCTOR_P (current_function_decl))
10520 error_at (token->location,
10521 "only constructors take member initializers");
10523 /* Loop through the list. */
10526 tree mem_initializer;
10528 token = cp_lexer_peek_token (parser->lexer);
10529 /* Parse the mem-initializer. */
10530 mem_initializer = cp_parser_mem_initializer (parser);
10531 /* If the next token is a `...', we're expanding member initializers. */
10532 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
10534 /* Consume the `...'. */
10535 cp_lexer_consume_token (parser->lexer);
10537 /* The TREE_PURPOSE must be a _TYPE, because base-specifiers
10538 can be expanded but members cannot. */
10539 if (mem_initializer != error_mark_node
10540 && !TYPE_P (TREE_PURPOSE (mem_initializer)))
10542 error_at (token->location,
10543 "cannot expand initializer for member %<%D%>",
10544 TREE_PURPOSE (mem_initializer));
10545 mem_initializer = error_mark_node;
10548 /* Construct the pack expansion type. */
10549 if (mem_initializer != error_mark_node)
10550 mem_initializer = make_pack_expansion (mem_initializer);
10552 /* Add it to the list, unless it was erroneous. */
10553 if (mem_initializer != error_mark_node)
10555 TREE_CHAIN (mem_initializer) = mem_initializer_list;
10556 mem_initializer_list = mem_initializer;
10558 /* If the next token is not a `,', we're done. */
10559 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
10561 /* Consume the `,' token. */
10562 cp_lexer_consume_token (parser->lexer);
10565 /* Perform semantic analysis. */
10566 if (DECL_CONSTRUCTOR_P (current_function_decl))
10567 finish_mem_initializers (mem_initializer_list);
10570 /* Parse a mem-initializer.
10573 mem-initializer-id ( expression-list [opt] )
10574 mem-initializer-id braced-init-list
10579 ( expression-list [opt] )
10581 Returns a TREE_LIST. The TREE_PURPOSE is the TYPE (for a base
10582 class) or FIELD_DECL (for a non-static data member) to initialize;
10583 the TREE_VALUE is the expression-list. An empty initialization
10584 list is represented by void_list_node. */
10587 cp_parser_mem_initializer (cp_parser* parser)
10589 tree mem_initializer_id;
10590 tree expression_list;
10592 cp_token *token = cp_lexer_peek_token (parser->lexer);
10594 /* Find out what is being initialized. */
10595 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
10597 permerror (token->location,
10598 "anachronistic old-style base class initializer");
10599 mem_initializer_id = NULL_TREE;
10603 mem_initializer_id = cp_parser_mem_initializer_id (parser);
10604 if (mem_initializer_id == error_mark_node)
10605 return mem_initializer_id;
10607 member = expand_member_init (mem_initializer_id);
10608 if (member && !DECL_P (member))
10609 in_base_initializer = 1;
10611 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
10613 bool expr_non_constant_p;
10614 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
10615 expression_list = cp_parser_braced_list (parser, &expr_non_constant_p);
10616 CONSTRUCTOR_IS_DIRECT_INIT (expression_list) = 1;
10617 expression_list = build_tree_list (NULL_TREE, expression_list);
10622 vec = cp_parser_parenthesized_expression_list (parser, non_attr,
10624 /*allow_expansion_p=*/true,
10625 /*non_constant_p=*/NULL);
10627 return error_mark_node;
10628 expression_list = build_tree_list_vec (vec);
10629 release_tree_vector (vec);
10632 if (expression_list == error_mark_node)
10633 return error_mark_node;
10634 if (!expression_list)
10635 expression_list = void_type_node;
10637 in_base_initializer = 0;
10639 return member ? build_tree_list (member, expression_list) : error_mark_node;
10642 /* Parse a mem-initializer-id.
10644 mem-initializer-id:
10645 :: [opt] nested-name-specifier [opt] class-name
10648 Returns a TYPE indicating the class to be initializer for the first
10649 production. Returns an IDENTIFIER_NODE indicating the data member
10650 to be initialized for the second production. */
10653 cp_parser_mem_initializer_id (cp_parser* parser)
10655 bool global_scope_p;
10656 bool nested_name_specifier_p;
10657 bool template_p = false;
10660 cp_token *token = cp_lexer_peek_token (parser->lexer);
10662 /* `typename' is not allowed in this context ([temp.res]). */
10663 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TYPENAME))
10665 error_at (token->location,
10666 "keyword %<typename%> not allowed in this context (a qualified "
10667 "member initializer is implicitly a type)");
10668 cp_lexer_consume_token (parser->lexer);
10670 /* Look for the optional `::' operator. */
10672 = (cp_parser_global_scope_opt (parser,
10673 /*current_scope_valid_p=*/false)
10675 /* Look for the optional nested-name-specifier. The simplest way to
10680 The keyword `typename' is not permitted in a base-specifier or
10681 mem-initializer; in these contexts a qualified name that
10682 depends on a template-parameter is implicitly assumed to be a
10685 is to assume that we have seen the `typename' keyword at this
10687 nested_name_specifier_p
10688 = (cp_parser_nested_name_specifier_opt (parser,
10689 /*typename_keyword_p=*/true,
10690 /*check_dependency_p=*/true,
10692 /*is_declaration=*/true)
10694 if (nested_name_specifier_p)
10695 template_p = cp_parser_optional_template_keyword (parser);
10696 /* If there is a `::' operator or a nested-name-specifier, then we
10697 are definitely looking for a class-name. */
10698 if (global_scope_p || nested_name_specifier_p)
10699 return cp_parser_class_name (parser,
10700 /*typename_keyword_p=*/true,
10701 /*template_keyword_p=*/template_p,
10703 /*check_dependency_p=*/true,
10704 /*class_head_p=*/false,
10705 /*is_declaration=*/true);
10706 /* Otherwise, we could also be looking for an ordinary identifier. */
10707 cp_parser_parse_tentatively (parser);
10708 /* Try a class-name. */
10709 id = cp_parser_class_name (parser,
10710 /*typename_keyword_p=*/true,
10711 /*template_keyword_p=*/false,
10713 /*check_dependency_p=*/true,
10714 /*class_head_p=*/false,
10715 /*is_declaration=*/true);
10716 /* If we found one, we're done. */
10717 if (cp_parser_parse_definitely (parser))
10719 /* Otherwise, look for an ordinary identifier. */
10720 return cp_parser_identifier (parser);
10723 /* Overloading [gram.over] */
10725 /* Parse an operator-function-id.
10727 operator-function-id:
10730 Returns an IDENTIFIER_NODE for the operator which is a
10731 human-readable spelling of the identifier, e.g., `operator +'. */
10734 cp_parser_operator_function_id (cp_parser* parser)
10736 /* Look for the `operator' keyword. */
10737 if (!cp_parser_require_keyword (parser, RID_OPERATOR, RT_OPERATOR))
10738 return error_mark_node;
10739 /* And then the name of the operator itself. */
10740 return cp_parser_operator (parser);
10743 /* Parse an operator.
10746 new delete new[] delete[] + - * / % ^ & | ~ ! = < >
10747 += -= *= /= %= ^= &= |= << >> >>= <<= == != <= >= &&
10748 || ++ -- , ->* -> () []
10755 Returns an IDENTIFIER_NODE for the operator which is a
10756 human-readable spelling of the identifier, e.g., `operator +'. */
10759 cp_parser_operator (cp_parser* parser)
10761 tree id = NULL_TREE;
10764 /* Peek at the next token. */
10765 token = cp_lexer_peek_token (parser->lexer);
10766 /* Figure out which operator we have. */
10767 switch (token->type)
10773 /* The keyword should be either `new' or `delete'. */
10774 if (token->keyword == RID_NEW)
10776 else if (token->keyword == RID_DELETE)
10781 /* Consume the `new' or `delete' token. */
10782 cp_lexer_consume_token (parser->lexer);
10784 /* Peek at the next token. */
10785 token = cp_lexer_peek_token (parser->lexer);
10786 /* If it's a `[' token then this is the array variant of the
10788 if (token->type == CPP_OPEN_SQUARE)
10790 /* Consume the `[' token. */
10791 cp_lexer_consume_token (parser->lexer);
10792 /* Look for the `]' token. */
10793 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
10794 id = ansi_opname (op == NEW_EXPR
10795 ? VEC_NEW_EXPR : VEC_DELETE_EXPR);
10797 /* Otherwise, we have the non-array variant. */
10799 id = ansi_opname (op);
10805 id = ansi_opname (PLUS_EXPR);
10809 id = ansi_opname (MINUS_EXPR);
10813 id = ansi_opname (MULT_EXPR);
10817 id = ansi_opname (TRUNC_DIV_EXPR);
10821 id = ansi_opname (TRUNC_MOD_EXPR);
10825 id = ansi_opname (BIT_XOR_EXPR);
10829 id = ansi_opname (BIT_AND_EXPR);
10833 id = ansi_opname (BIT_IOR_EXPR);
10837 id = ansi_opname (BIT_NOT_EXPR);
10841 id = ansi_opname (TRUTH_NOT_EXPR);
10845 id = ansi_assopname (NOP_EXPR);
10849 id = ansi_opname (LT_EXPR);
10853 id = ansi_opname (GT_EXPR);
10857 id = ansi_assopname (PLUS_EXPR);
10861 id = ansi_assopname (MINUS_EXPR);
10865 id = ansi_assopname (MULT_EXPR);
10869 id = ansi_assopname (TRUNC_DIV_EXPR);
10873 id = ansi_assopname (TRUNC_MOD_EXPR);
10877 id = ansi_assopname (BIT_XOR_EXPR);
10881 id = ansi_assopname (BIT_AND_EXPR);
10885 id = ansi_assopname (BIT_IOR_EXPR);
10889 id = ansi_opname (LSHIFT_EXPR);
10893 id = ansi_opname (RSHIFT_EXPR);
10896 case CPP_LSHIFT_EQ:
10897 id = ansi_assopname (LSHIFT_EXPR);
10900 case CPP_RSHIFT_EQ:
10901 id = ansi_assopname (RSHIFT_EXPR);
10905 id = ansi_opname (EQ_EXPR);
10909 id = ansi_opname (NE_EXPR);
10913 id = ansi_opname (LE_EXPR);
10916 case CPP_GREATER_EQ:
10917 id = ansi_opname (GE_EXPR);
10921 id = ansi_opname (TRUTH_ANDIF_EXPR);
10925 id = ansi_opname (TRUTH_ORIF_EXPR);
10928 case CPP_PLUS_PLUS:
10929 id = ansi_opname (POSTINCREMENT_EXPR);
10932 case CPP_MINUS_MINUS:
10933 id = ansi_opname (PREDECREMENT_EXPR);
10937 id = ansi_opname (COMPOUND_EXPR);
10940 case CPP_DEREF_STAR:
10941 id = ansi_opname (MEMBER_REF);
10945 id = ansi_opname (COMPONENT_REF);
10948 case CPP_OPEN_PAREN:
10949 /* Consume the `('. */
10950 cp_lexer_consume_token (parser->lexer);
10951 /* Look for the matching `)'. */
10952 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
10953 return ansi_opname (CALL_EXPR);
10955 case CPP_OPEN_SQUARE:
10956 /* Consume the `['. */
10957 cp_lexer_consume_token (parser->lexer);
10958 /* Look for the matching `]'. */
10959 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
10960 return ansi_opname (ARRAY_REF);
10963 /* Anything else is an error. */
10967 /* If we have selected an identifier, we need to consume the
10970 cp_lexer_consume_token (parser->lexer);
10971 /* Otherwise, no valid operator name was present. */
10974 cp_parser_error (parser, "expected operator");
10975 id = error_mark_node;
10981 /* Parse a template-declaration.
10983 template-declaration:
10984 export [opt] template < template-parameter-list > declaration
10986 If MEMBER_P is TRUE, this template-declaration occurs within a
10989 The grammar rule given by the standard isn't correct. What
10990 is really meant is:
10992 template-declaration:
10993 export [opt] template-parameter-list-seq
10994 decl-specifier-seq [opt] init-declarator [opt] ;
10995 export [opt] template-parameter-list-seq
10996 function-definition
10998 template-parameter-list-seq:
10999 template-parameter-list-seq [opt]
11000 template < template-parameter-list > */
11003 cp_parser_template_declaration (cp_parser* parser, bool member_p)
11005 /* Check for `export'. */
11006 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_EXPORT))
11008 /* Consume the `export' token. */
11009 cp_lexer_consume_token (parser->lexer);
11010 /* Warn that we do not support `export'. */
11011 warning (0, "keyword %<export%> not implemented, and will be ignored");
11014 cp_parser_template_declaration_after_export (parser, member_p);
11017 /* Parse a template-parameter-list.
11019 template-parameter-list:
11021 template-parameter-list , template-parameter
11023 Returns a TREE_LIST. Each node represents a template parameter.
11024 The nodes are connected via their TREE_CHAINs. */
11027 cp_parser_template_parameter_list (cp_parser* parser)
11029 tree parameter_list = NULL_TREE;
11031 begin_template_parm_list ();
11033 /* The loop below parses the template parms. We first need to know
11034 the total number of template parms to be able to compute proper
11035 canonical types of each dependent type. So after the loop, when
11036 we know the total number of template parms,
11037 end_template_parm_list computes the proper canonical types and
11038 fixes up the dependent types accordingly. */
11043 bool is_parameter_pack;
11044 location_t parm_loc;
11046 /* Parse the template-parameter. */
11047 parm_loc = cp_lexer_peek_token (parser->lexer)->location;
11048 parameter = cp_parser_template_parameter (parser,
11050 &is_parameter_pack);
11051 /* Add it to the list. */
11052 if (parameter != error_mark_node)
11053 parameter_list = process_template_parm (parameter_list,
11061 tree err_parm = build_tree_list (parameter, parameter);
11062 parameter_list = chainon (parameter_list, err_parm);
11065 /* If the next token is not a `,', we're done. */
11066 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
11068 /* Otherwise, consume the `,' token. */
11069 cp_lexer_consume_token (parser->lexer);
11072 return end_template_parm_list (parameter_list);
11075 /* Parse a template-parameter.
11077 template-parameter:
11079 parameter-declaration
11081 If all goes well, returns a TREE_LIST. The TREE_VALUE represents
11082 the parameter. The TREE_PURPOSE is the default value, if any.
11083 Returns ERROR_MARK_NODE on failure. *IS_NON_TYPE is set to true
11084 iff this parameter is a non-type parameter. *IS_PARAMETER_PACK is
11085 set to true iff this parameter is a parameter pack. */
11088 cp_parser_template_parameter (cp_parser* parser, bool *is_non_type,
11089 bool *is_parameter_pack)
11092 cp_parameter_declarator *parameter_declarator;
11093 cp_declarator *id_declarator;
11096 /* Assume it is a type parameter or a template parameter. */
11097 *is_non_type = false;
11098 /* Assume it not a parameter pack. */
11099 *is_parameter_pack = false;
11100 /* Peek at the next token. */
11101 token = cp_lexer_peek_token (parser->lexer);
11102 /* If it is `class' or `template', we have a type-parameter. */
11103 if (token->keyword == RID_TEMPLATE)
11104 return cp_parser_type_parameter (parser, is_parameter_pack);
11105 /* If it is `class' or `typename' we do not know yet whether it is a
11106 type parameter or a non-type parameter. Consider:
11108 template <typename T, typename T::X X> ...
11112 template <class C, class D*> ...
11114 Here, the first parameter is a type parameter, and the second is
11115 a non-type parameter. We can tell by looking at the token after
11116 the identifier -- if it is a `,', `=', or `>' then we have a type
11118 if (token->keyword == RID_TYPENAME || token->keyword == RID_CLASS)
11120 /* Peek at the token after `class' or `typename'. */
11121 token = cp_lexer_peek_nth_token (parser->lexer, 2);
11122 /* If it's an ellipsis, we have a template type parameter
11124 if (token->type == CPP_ELLIPSIS)
11125 return cp_parser_type_parameter (parser, is_parameter_pack);
11126 /* If it's an identifier, skip it. */
11127 if (token->type == CPP_NAME)
11128 token = cp_lexer_peek_nth_token (parser->lexer, 3);
11129 /* Now, see if the token looks like the end of a template
11131 if (token->type == CPP_COMMA
11132 || token->type == CPP_EQ
11133 || token->type == CPP_GREATER)
11134 return cp_parser_type_parameter (parser, is_parameter_pack);
11137 /* Otherwise, it is a non-type parameter.
11141 When parsing a default template-argument for a non-type
11142 template-parameter, the first non-nested `>' is taken as the end
11143 of the template parameter-list rather than a greater-than
11145 *is_non_type = true;
11146 parameter_declarator
11147 = cp_parser_parameter_declaration (parser, /*template_parm_p=*/true,
11148 /*parenthesized_p=*/NULL);
11150 /* If the parameter declaration is marked as a parameter pack, set
11151 *IS_PARAMETER_PACK to notify the caller. Also, unmark the
11152 declarator's PACK_EXPANSION_P, otherwise we'll get errors from
11154 if (parameter_declarator
11155 && parameter_declarator->declarator
11156 && parameter_declarator->declarator->parameter_pack_p)
11158 *is_parameter_pack = true;
11159 parameter_declarator->declarator->parameter_pack_p = false;
11162 /* If the next token is an ellipsis, and we don't already have it
11163 marked as a parameter pack, then we have a parameter pack (that
11164 has no declarator). */
11165 if (!*is_parameter_pack
11166 && cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS)
11167 && declarator_can_be_parameter_pack (parameter_declarator->declarator))
11169 /* Consume the `...'. */
11170 cp_lexer_consume_token (parser->lexer);
11171 maybe_warn_variadic_templates ();
11173 *is_parameter_pack = true;
11175 /* We might end up with a pack expansion as the type of the non-type
11176 template parameter, in which case this is a non-type template
11178 else if (parameter_declarator
11179 && parameter_declarator->decl_specifiers.type
11180 && PACK_EXPANSION_P (parameter_declarator->decl_specifiers.type))
11182 *is_parameter_pack = true;
11183 parameter_declarator->decl_specifiers.type =
11184 PACK_EXPANSION_PATTERN (parameter_declarator->decl_specifiers.type);
11187 if (*is_parameter_pack && cp_lexer_next_token_is (parser->lexer, CPP_EQ))
11189 /* Parameter packs cannot have default arguments. However, a
11190 user may try to do so, so we'll parse them and give an
11191 appropriate diagnostic here. */
11193 /* Consume the `='. */
11194 cp_token *start_token = cp_lexer_peek_token (parser->lexer);
11195 cp_lexer_consume_token (parser->lexer);
11197 /* Find the name of the parameter pack. */
11198 id_declarator = parameter_declarator->declarator;
11199 while (id_declarator && id_declarator->kind != cdk_id)
11200 id_declarator = id_declarator->declarator;
11202 if (id_declarator && id_declarator->kind == cdk_id)
11203 error_at (start_token->location,
11204 "template parameter pack %qD cannot have a default argument",
11205 id_declarator->u.id.unqualified_name);
11207 error_at (start_token->location,
11208 "template parameter pack cannot have a default argument");
11210 /* Parse the default argument, but throw away the result. */
11211 cp_parser_default_argument (parser, /*template_parm_p=*/true);
11214 parm = grokdeclarator (parameter_declarator->declarator,
11215 ¶meter_declarator->decl_specifiers,
11216 TPARM, /*initialized=*/0,
11217 /*attrlist=*/NULL);
11218 if (parm == error_mark_node)
11219 return error_mark_node;
11221 return build_tree_list (parameter_declarator->default_argument, parm);
11224 /* Parse a type-parameter.
11227 class identifier [opt]
11228 class identifier [opt] = type-id
11229 typename identifier [opt]
11230 typename identifier [opt] = type-id
11231 template < template-parameter-list > class identifier [opt]
11232 template < template-parameter-list > class identifier [opt]
11235 GNU Extension (variadic templates):
11238 class ... identifier [opt]
11239 typename ... identifier [opt]
11241 Returns a TREE_LIST. The TREE_VALUE is itself a TREE_LIST. The
11242 TREE_PURPOSE is the default-argument, if any. The TREE_VALUE is
11243 the declaration of the parameter.
11245 Sets *IS_PARAMETER_PACK if this is a template parameter pack. */
11248 cp_parser_type_parameter (cp_parser* parser, bool *is_parameter_pack)
11253 /* Look for a keyword to tell us what kind of parameter this is. */
11254 token = cp_parser_require (parser, CPP_KEYWORD, RT_CLASS_TYPENAME_TEMPLATE);
11256 return error_mark_node;
11258 switch (token->keyword)
11264 tree default_argument;
11266 /* If the next token is an ellipsis, we have a template
11268 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
11270 /* Consume the `...' token. */
11271 cp_lexer_consume_token (parser->lexer);
11272 maybe_warn_variadic_templates ();
11274 *is_parameter_pack = true;
11277 /* If the next token is an identifier, then it names the
11279 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
11280 identifier = cp_parser_identifier (parser);
11282 identifier = NULL_TREE;
11284 /* Create the parameter. */
11285 parameter = finish_template_type_parm (class_type_node, identifier);
11287 /* If the next token is an `=', we have a default argument. */
11288 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
11290 /* Consume the `=' token. */
11291 cp_lexer_consume_token (parser->lexer);
11292 /* Parse the default-argument. */
11293 push_deferring_access_checks (dk_no_deferred);
11294 default_argument = cp_parser_type_id (parser);
11296 /* Template parameter packs cannot have default
11298 if (*is_parameter_pack)
11301 error_at (token->location,
11302 "template parameter pack %qD cannot have a "
11303 "default argument", identifier);
11305 error_at (token->location,
11306 "template parameter packs cannot have "
11307 "default arguments");
11308 default_argument = NULL_TREE;
11310 pop_deferring_access_checks ();
11313 default_argument = NULL_TREE;
11315 /* Create the combined representation of the parameter and the
11316 default argument. */
11317 parameter = build_tree_list (default_argument, parameter);
11324 tree default_argument;
11326 /* Look for the `<'. */
11327 cp_parser_require (parser, CPP_LESS, RT_LESS);
11328 /* Parse the template-parameter-list. */
11329 cp_parser_template_parameter_list (parser);
11330 /* Look for the `>'. */
11331 cp_parser_require (parser, CPP_GREATER, RT_GREATER);
11332 /* Look for the `class' keyword. */
11333 cp_parser_require_keyword (parser, RID_CLASS, RT_CLASS);
11334 /* If the next token is an ellipsis, we have a template
11336 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
11338 /* Consume the `...' token. */
11339 cp_lexer_consume_token (parser->lexer);
11340 maybe_warn_variadic_templates ();
11342 *is_parameter_pack = true;
11344 /* If the next token is an `=', then there is a
11345 default-argument. If the next token is a `>', we are at
11346 the end of the parameter-list. If the next token is a `,',
11347 then we are at the end of this parameter. */
11348 if (cp_lexer_next_token_is_not (parser->lexer, CPP_EQ)
11349 && cp_lexer_next_token_is_not (parser->lexer, CPP_GREATER)
11350 && cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
11352 identifier = cp_parser_identifier (parser);
11353 /* Treat invalid names as if the parameter were nameless. */
11354 if (identifier == error_mark_node)
11355 identifier = NULL_TREE;
11358 identifier = NULL_TREE;
11360 /* Create the template parameter. */
11361 parameter = finish_template_template_parm (class_type_node,
11364 /* If the next token is an `=', then there is a
11365 default-argument. */
11366 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
11370 /* Consume the `='. */
11371 cp_lexer_consume_token (parser->lexer);
11372 /* Parse the id-expression. */
11373 push_deferring_access_checks (dk_no_deferred);
11374 /* save token before parsing the id-expression, for error
11376 token = cp_lexer_peek_token (parser->lexer);
11378 = cp_parser_id_expression (parser,
11379 /*template_keyword_p=*/false,
11380 /*check_dependency_p=*/true,
11381 /*template_p=*/&is_template,
11382 /*declarator_p=*/false,
11383 /*optional_p=*/false);
11384 if (TREE_CODE (default_argument) == TYPE_DECL)
11385 /* If the id-expression was a template-id that refers to
11386 a template-class, we already have the declaration here,
11387 so no further lookup is needed. */
11390 /* Look up the name. */
11392 = cp_parser_lookup_name (parser, default_argument,
11394 /*is_template=*/is_template,
11395 /*is_namespace=*/false,
11396 /*check_dependency=*/true,
11397 /*ambiguous_decls=*/NULL,
11399 /* See if the default argument is valid. */
11401 = check_template_template_default_arg (default_argument);
11403 /* Template parameter packs cannot have default
11405 if (*is_parameter_pack)
11408 error_at (token->location,
11409 "template parameter pack %qD cannot "
11410 "have a default argument",
11413 error_at (token->location, "template parameter packs cannot "
11414 "have default arguments");
11415 default_argument = NULL_TREE;
11417 pop_deferring_access_checks ();
11420 default_argument = NULL_TREE;
11422 /* Create the combined representation of the parameter and the
11423 default argument. */
11424 parameter = build_tree_list (default_argument, parameter);
11429 gcc_unreachable ();
11436 /* Parse a template-id.
11439 template-name < template-argument-list [opt] >
11441 If TEMPLATE_KEYWORD_P is TRUE, then we have just seen the
11442 `template' keyword. In this case, a TEMPLATE_ID_EXPR will be
11443 returned. Otherwise, if the template-name names a function, or set
11444 of functions, returns a TEMPLATE_ID_EXPR. If the template-name
11445 names a class, returns a TYPE_DECL for the specialization.
11447 If CHECK_DEPENDENCY_P is FALSE, names are looked up in
11448 uninstantiated templates. */
11451 cp_parser_template_id (cp_parser *parser,
11452 bool template_keyword_p,
11453 bool check_dependency_p,
11454 bool is_declaration)
11460 cp_token_position start_of_id = 0;
11461 deferred_access_check *chk;
11462 VEC (deferred_access_check,gc) *access_check;
11463 cp_token *next_token = NULL, *next_token_2 = NULL;
11464 bool is_identifier;
11466 /* If the next token corresponds to a template-id, there is no need
11468 next_token = cp_lexer_peek_token (parser->lexer);
11469 if (next_token->type == CPP_TEMPLATE_ID)
11471 struct tree_check *check_value;
11473 /* Get the stored value. */
11474 check_value = cp_lexer_consume_token (parser->lexer)->u.tree_check_value;
11475 /* Perform any access checks that were deferred. */
11476 access_check = check_value->checks;
11479 FOR_EACH_VEC_ELT (deferred_access_check, access_check, i, chk)
11480 perform_or_defer_access_check (chk->binfo,
11484 /* Return the stored value. */
11485 return check_value->value;
11488 /* Avoid performing name lookup if there is no possibility of
11489 finding a template-id. */
11490 if ((next_token->type != CPP_NAME && next_token->keyword != RID_OPERATOR)
11491 || (next_token->type == CPP_NAME
11492 && !cp_parser_nth_token_starts_template_argument_list_p
11495 cp_parser_error (parser, "expected template-id");
11496 return error_mark_node;
11499 /* Remember where the template-id starts. */
11500 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
11501 start_of_id = cp_lexer_token_position (parser->lexer, false);
11503 push_deferring_access_checks (dk_deferred);
11505 /* Parse the template-name. */
11506 is_identifier = false;
11507 templ = cp_parser_template_name (parser, template_keyword_p,
11508 check_dependency_p,
11511 if (templ == error_mark_node || is_identifier)
11513 pop_deferring_access_checks ();
11517 /* If we find the sequence `[:' after a template-name, it's probably
11518 a digraph-typo for `< ::'. Substitute the tokens and check if we can
11519 parse correctly the argument list. */
11520 next_token = cp_lexer_peek_token (parser->lexer);
11521 next_token_2 = cp_lexer_peek_nth_token (parser->lexer, 2);
11522 if (next_token->type == CPP_OPEN_SQUARE
11523 && next_token->flags & DIGRAPH
11524 && next_token_2->type == CPP_COLON
11525 && !(next_token_2->flags & PREV_WHITE))
11527 cp_parser_parse_tentatively (parser);
11528 /* Change `:' into `::'. */
11529 next_token_2->type = CPP_SCOPE;
11530 /* Consume the first token (CPP_OPEN_SQUARE - which we pretend it is
11532 cp_lexer_consume_token (parser->lexer);
11534 /* Parse the arguments. */
11535 arguments = cp_parser_enclosed_template_argument_list (parser);
11536 if (!cp_parser_parse_definitely (parser))
11538 /* If we couldn't parse an argument list, then we revert our changes
11539 and return simply an error. Maybe this is not a template-id
11541 next_token_2->type = CPP_COLON;
11542 cp_parser_error (parser, "expected %<<%>");
11543 pop_deferring_access_checks ();
11544 return error_mark_node;
11546 /* Otherwise, emit an error about the invalid digraph, but continue
11547 parsing because we got our argument list. */
11548 if (permerror (next_token->location,
11549 "%<<::%> cannot begin a template-argument list"))
11551 static bool hint = false;
11552 inform (next_token->location,
11553 "%<<:%> is an alternate spelling for %<[%>."
11554 " Insert whitespace between %<<%> and %<::%>");
11555 if (!hint && !flag_permissive)
11557 inform (next_token->location, "(if you use %<-fpermissive%>"
11558 " G++ will accept your code)");
11565 /* Look for the `<' that starts the template-argument-list. */
11566 if (!cp_parser_require (parser, CPP_LESS, RT_LESS))
11568 pop_deferring_access_checks ();
11569 return error_mark_node;
11571 /* Parse the arguments. */
11572 arguments = cp_parser_enclosed_template_argument_list (parser);
11575 /* Build a representation of the specialization. */
11576 if (TREE_CODE (templ) == IDENTIFIER_NODE)
11577 template_id = build_min_nt (TEMPLATE_ID_EXPR, templ, arguments);
11578 else if (DECL_CLASS_TEMPLATE_P (templ)
11579 || DECL_TEMPLATE_TEMPLATE_PARM_P (templ))
11581 bool entering_scope;
11582 /* In "template <typename T> ... A<T>::", A<T> is the abstract A
11583 template (rather than some instantiation thereof) only if
11584 is not nested within some other construct. For example, in
11585 "template <typename T> void f(T) { A<T>::", A<T> is just an
11586 instantiation of A. */
11587 entering_scope = (template_parm_scope_p ()
11588 && cp_lexer_next_token_is (parser->lexer,
11591 = finish_template_type (templ, arguments, entering_scope);
11595 /* If it's not a class-template or a template-template, it should be
11596 a function-template. */
11597 gcc_assert ((DECL_FUNCTION_TEMPLATE_P (templ)
11598 || TREE_CODE (templ) == OVERLOAD
11599 || BASELINK_P (templ)));
11601 template_id = lookup_template_function (templ, arguments);
11604 /* If parsing tentatively, replace the sequence of tokens that makes
11605 up the template-id with a CPP_TEMPLATE_ID token. That way,
11606 should we re-parse the token stream, we will not have to repeat
11607 the effort required to do the parse, nor will we issue duplicate
11608 error messages about problems during instantiation of the
11612 cp_token *token = cp_lexer_token_at (parser->lexer, start_of_id);
11614 /* Reset the contents of the START_OF_ID token. */
11615 token->type = CPP_TEMPLATE_ID;
11616 /* Retrieve any deferred checks. Do not pop this access checks yet
11617 so the memory will not be reclaimed during token replacing below. */
11618 token->u.tree_check_value = ggc_alloc_cleared_tree_check ();
11619 token->u.tree_check_value->value = template_id;
11620 token->u.tree_check_value->checks = get_deferred_access_checks ();
11621 token->keyword = RID_MAX;
11623 /* Purge all subsequent tokens. */
11624 cp_lexer_purge_tokens_after (parser->lexer, start_of_id);
11626 /* ??? Can we actually assume that, if template_id ==
11627 error_mark_node, we will have issued a diagnostic to the
11628 user, as opposed to simply marking the tentative parse as
11630 if (cp_parser_error_occurred (parser) && template_id != error_mark_node)
11631 error_at (token->location, "parse error in template argument list");
11634 pop_deferring_access_checks ();
11635 return template_id;
11638 /* Parse a template-name.
11643 The standard should actually say:
11647 operator-function-id
11649 A defect report has been filed about this issue.
11651 A conversion-function-id cannot be a template name because they cannot
11652 be part of a template-id. In fact, looking at this code:
11654 a.operator K<int>()
11656 the conversion-function-id is "operator K<int>", and K<int> is a type-id.
11657 It is impossible to call a templated conversion-function-id with an
11658 explicit argument list, since the only allowed template parameter is
11659 the type to which it is converting.
11661 If TEMPLATE_KEYWORD_P is true, then we have just seen the
11662 `template' keyword, in a construction like:
11666 In that case `f' is taken to be a template-name, even though there
11667 is no way of knowing for sure.
11669 Returns the TEMPLATE_DECL for the template, or an OVERLOAD if the
11670 name refers to a set of overloaded functions, at least one of which
11671 is a template, or an IDENTIFIER_NODE with the name of the template,
11672 if TEMPLATE_KEYWORD_P is true. If CHECK_DEPENDENCY_P is FALSE,
11673 names are looked up inside uninstantiated templates. */
11676 cp_parser_template_name (cp_parser* parser,
11677 bool template_keyword_p,
11678 bool check_dependency_p,
11679 bool is_declaration,
11680 bool *is_identifier)
11685 cp_token *token = cp_lexer_peek_token (parser->lexer);
11687 /* If the next token is `operator', then we have either an
11688 operator-function-id or a conversion-function-id. */
11689 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_OPERATOR))
11691 /* We don't know whether we're looking at an
11692 operator-function-id or a conversion-function-id. */
11693 cp_parser_parse_tentatively (parser);
11694 /* Try an operator-function-id. */
11695 identifier = cp_parser_operator_function_id (parser);
11696 /* If that didn't work, try a conversion-function-id. */
11697 if (!cp_parser_parse_definitely (parser))
11699 cp_parser_error (parser, "expected template-name");
11700 return error_mark_node;
11703 /* Look for the identifier. */
11705 identifier = cp_parser_identifier (parser);
11707 /* If we didn't find an identifier, we don't have a template-id. */
11708 if (identifier == error_mark_node)
11709 return error_mark_node;
11711 /* If the name immediately followed the `template' keyword, then it
11712 is a template-name. However, if the next token is not `<', then
11713 we do not treat it as a template-name, since it is not being used
11714 as part of a template-id. This enables us to handle constructs
11717 template <typename T> struct S { S(); };
11718 template <typename T> S<T>::S();
11720 correctly. We would treat `S' as a template -- if it were `S<T>'
11721 -- but we do not if there is no `<'. */
11723 if (processing_template_decl
11724 && cp_parser_nth_token_starts_template_argument_list_p (parser, 1))
11726 /* In a declaration, in a dependent context, we pretend that the
11727 "template" keyword was present in order to improve error
11728 recovery. For example, given:
11730 template <typename T> void f(T::X<int>);
11732 we want to treat "X<int>" as a template-id. */
11734 && !template_keyword_p
11735 && parser->scope && TYPE_P (parser->scope)
11736 && check_dependency_p
11737 && dependent_scope_p (parser->scope)
11738 /* Do not do this for dtors (or ctors), since they never
11739 need the template keyword before their name. */
11740 && !constructor_name_p (identifier, parser->scope))
11742 cp_token_position start = 0;
11744 /* Explain what went wrong. */
11745 error_at (token->location, "non-template %qD used as template",
11747 inform (token->location, "use %<%T::template %D%> to indicate that it is a template",
11748 parser->scope, identifier);
11749 /* If parsing tentatively, find the location of the "<" token. */
11750 if (cp_parser_simulate_error (parser))
11751 start = cp_lexer_token_position (parser->lexer, true);
11752 /* Parse the template arguments so that we can issue error
11753 messages about them. */
11754 cp_lexer_consume_token (parser->lexer);
11755 cp_parser_enclosed_template_argument_list (parser);
11756 /* Skip tokens until we find a good place from which to
11757 continue parsing. */
11758 cp_parser_skip_to_closing_parenthesis (parser,
11759 /*recovering=*/true,
11761 /*consume_paren=*/false);
11762 /* If parsing tentatively, permanently remove the
11763 template argument list. That will prevent duplicate
11764 error messages from being issued about the missing
11765 "template" keyword. */
11767 cp_lexer_purge_tokens_after (parser->lexer, start);
11769 *is_identifier = true;
11773 /* If the "template" keyword is present, then there is generally
11774 no point in doing name-lookup, so we just return IDENTIFIER.
11775 But, if the qualifying scope is non-dependent then we can
11776 (and must) do name-lookup normally. */
11777 if (template_keyword_p
11779 || (TYPE_P (parser->scope)
11780 && dependent_type_p (parser->scope))))
11784 /* Look up the name. */
11785 decl = cp_parser_lookup_name (parser, identifier,
11787 /*is_template=*/true,
11788 /*is_namespace=*/false,
11789 check_dependency_p,
11790 /*ambiguous_decls=*/NULL,
11793 /* If DECL is a template, then the name was a template-name. */
11794 if (TREE_CODE (decl) == TEMPLATE_DECL)
11798 tree fn = NULL_TREE;
11800 /* The standard does not explicitly indicate whether a name that
11801 names a set of overloaded declarations, some of which are
11802 templates, is a template-name. However, such a name should
11803 be a template-name; otherwise, there is no way to form a
11804 template-id for the overloaded templates. */
11805 fns = BASELINK_P (decl) ? BASELINK_FUNCTIONS (decl) : decl;
11806 if (TREE_CODE (fns) == OVERLOAD)
11807 for (fn = fns; fn; fn = OVL_NEXT (fn))
11808 if (TREE_CODE (OVL_CURRENT (fn)) == TEMPLATE_DECL)
11813 /* The name does not name a template. */
11814 cp_parser_error (parser, "expected template-name");
11815 return error_mark_node;
11819 /* If DECL is dependent, and refers to a function, then just return
11820 its name; we will look it up again during template instantiation. */
11821 if (DECL_FUNCTION_TEMPLATE_P (decl) || !DECL_P (decl))
11823 tree scope = CP_DECL_CONTEXT (get_first_fn (decl));
11824 if (TYPE_P (scope) && dependent_type_p (scope))
11831 /* Parse a template-argument-list.
11833 template-argument-list:
11834 template-argument ... [opt]
11835 template-argument-list , template-argument ... [opt]
11837 Returns a TREE_VEC containing the arguments. */
11840 cp_parser_template_argument_list (cp_parser* parser)
11842 tree fixed_args[10];
11843 unsigned n_args = 0;
11844 unsigned alloced = 10;
11845 tree *arg_ary = fixed_args;
11847 bool saved_in_template_argument_list_p;
11849 bool saved_non_ice_p;
11851 saved_in_template_argument_list_p = parser->in_template_argument_list_p;
11852 parser->in_template_argument_list_p = true;
11853 /* Even if the template-id appears in an integral
11854 constant-expression, the contents of the argument list do
11856 saved_ice_p = parser->integral_constant_expression_p;
11857 parser->integral_constant_expression_p = false;
11858 saved_non_ice_p = parser->non_integral_constant_expression_p;
11859 parser->non_integral_constant_expression_p = false;
11860 /* Parse the arguments. */
11866 /* Consume the comma. */
11867 cp_lexer_consume_token (parser->lexer);
11869 /* Parse the template-argument. */
11870 argument = cp_parser_template_argument (parser);
11872 /* If the next token is an ellipsis, we're expanding a template
11874 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
11876 if (argument == error_mark_node)
11878 cp_token *token = cp_lexer_peek_token (parser->lexer);
11879 error_at (token->location,
11880 "expected parameter pack before %<...%>");
11882 /* Consume the `...' token. */
11883 cp_lexer_consume_token (parser->lexer);
11885 /* Make the argument into a TYPE_PACK_EXPANSION or
11886 EXPR_PACK_EXPANSION. */
11887 argument = make_pack_expansion (argument);
11890 if (n_args == alloced)
11894 if (arg_ary == fixed_args)
11896 arg_ary = XNEWVEC (tree, alloced);
11897 memcpy (arg_ary, fixed_args, sizeof (tree) * n_args);
11900 arg_ary = XRESIZEVEC (tree, arg_ary, alloced);
11902 arg_ary[n_args++] = argument;
11904 while (cp_lexer_next_token_is (parser->lexer, CPP_COMMA));
11906 vec = make_tree_vec (n_args);
11909 TREE_VEC_ELT (vec, n_args) = arg_ary[n_args];
11911 if (arg_ary != fixed_args)
11913 parser->non_integral_constant_expression_p = saved_non_ice_p;
11914 parser->integral_constant_expression_p = saved_ice_p;
11915 parser->in_template_argument_list_p = saved_in_template_argument_list_p;
11916 #ifdef ENABLE_CHECKING
11917 SET_NON_DEFAULT_TEMPLATE_ARGS_COUNT (vec, TREE_VEC_LENGTH (vec));
11922 /* Parse a template-argument.
11925 assignment-expression
11929 The representation is that of an assignment-expression, type-id, or
11930 id-expression -- except that the qualified id-expression is
11931 evaluated, so that the value returned is either a DECL or an
11934 Although the standard says "assignment-expression", it forbids
11935 throw-expressions or assignments in the template argument.
11936 Therefore, we use "conditional-expression" instead. */
11939 cp_parser_template_argument (cp_parser* parser)
11944 bool maybe_type_id = false;
11945 cp_token *token = NULL, *argument_start_token = NULL;
11948 /* There's really no way to know what we're looking at, so we just
11949 try each alternative in order.
11953 In a template-argument, an ambiguity between a type-id and an
11954 expression is resolved to a type-id, regardless of the form of
11955 the corresponding template-parameter.
11957 Therefore, we try a type-id first. */
11958 cp_parser_parse_tentatively (parser);
11959 argument = cp_parser_template_type_arg (parser);
11960 /* If there was no error parsing the type-id but the next token is a
11961 '>>', our behavior depends on which dialect of C++ we're
11962 parsing. In C++98, we probably found a typo for '> >'. But there
11963 are type-id which are also valid expressions. For instance:
11965 struct X { int operator >> (int); };
11966 template <int V> struct Foo {};
11969 Here 'X()' is a valid type-id of a function type, but the user just
11970 wanted to write the expression "X() >> 5". Thus, we remember that we
11971 found a valid type-id, but we still try to parse the argument as an
11972 expression to see what happens.
11974 In C++0x, the '>>' will be considered two separate '>'
11976 if (!cp_parser_error_occurred (parser)
11977 && cxx_dialect == cxx98
11978 && cp_lexer_next_token_is (parser->lexer, CPP_RSHIFT))
11980 maybe_type_id = true;
11981 cp_parser_abort_tentative_parse (parser);
11985 /* If the next token isn't a `,' or a `>', then this argument wasn't
11986 really finished. This means that the argument is not a valid
11988 if (!cp_parser_next_token_ends_template_argument_p (parser))
11989 cp_parser_error (parser, "expected template-argument");
11990 /* If that worked, we're done. */
11991 if (cp_parser_parse_definitely (parser))
11994 /* We're still not sure what the argument will be. */
11995 cp_parser_parse_tentatively (parser);
11996 /* Try a template. */
11997 argument_start_token = cp_lexer_peek_token (parser->lexer);
11998 argument = cp_parser_id_expression (parser,
11999 /*template_keyword_p=*/false,
12000 /*check_dependency_p=*/true,
12002 /*declarator_p=*/false,
12003 /*optional_p=*/false);
12004 /* If the next token isn't a `,' or a `>', then this argument wasn't
12005 really finished. */
12006 if (!cp_parser_next_token_ends_template_argument_p (parser))
12007 cp_parser_error (parser, "expected template-argument");
12008 if (!cp_parser_error_occurred (parser))
12010 /* Figure out what is being referred to. If the id-expression
12011 was for a class template specialization, then we will have a
12012 TYPE_DECL at this point. There is no need to do name lookup
12013 at this point in that case. */
12014 if (TREE_CODE (argument) != TYPE_DECL)
12015 argument = cp_parser_lookup_name (parser, argument,
12017 /*is_template=*/template_p,
12018 /*is_namespace=*/false,
12019 /*check_dependency=*/true,
12020 /*ambiguous_decls=*/NULL,
12021 argument_start_token->location);
12022 if (TREE_CODE (argument) != TEMPLATE_DECL
12023 && TREE_CODE (argument) != UNBOUND_CLASS_TEMPLATE)
12024 cp_parser_error (parser, "expected template-name");
12026 if (cp_parser_parse_definitely (parser))
12028 /* It must be a non-type argument. There permitted cases are given
12029 in [temp.arg.nontype]:
12031 -- an integral constant-expression of integral or enumeration
12034 -- the name of a non-type template-parameter; or
12036 -- the name of an object or function with external linkage...
12038 -- the address of an object or function with external linkage...
12040 -- a pointer to member... */
12041 /* Look for a non-type template parameter. */
12042 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
12044 cp_parser_parse_tentatively (parser);
12045 argument = cp_parser_primary_expression (parser,
12046 /*address_p=*/false,
12048 /*template_arg_p=*/true,
12050 if (TREE_CODE (argument) != TEMPLATE_PARM_INDEX
12051 || !cp_parser_next_token_ends_template_argument_p (parser))
12052 cp_parser_simulate_error (parser);
12053 if (cp_parser_parse_definitely (parser))
12057 /* If the next token is "&", the argument must be the address of an
12058 object or function with external linkage. */
12059 address_p = cp_lexer_next_token_is (parser->lexer, CPP_AND);
12061 cp_lexer_consume_token (parser->lexer);
12062 /* See if we might have an id-expression. */
12063 token = cp_lexer_peek_token (parser->lexer);
12064 if (token->type == CPP_NAME
12065 || token->keyword == RID_OPERATOR
12066 || token->type == CPP_SCOPE
12067 || token->type == CPP_TEMPLATE_ID
12068 || token->type == CPP_NESTED_NAME_SPECIFIER)
12070 cp_parser_parse_tentatively (parser);
12071 argument = cp_parser_primary_expression (parser,
12074 /*template_arg_p=*/true,
12076 if (cp_parser_error_occurred (parser)
12077 || !cp_parser_next_token_ends_template_argument_p (parser))
12078 cp_parser_abort_tentative_parse (parser);
12083 if (TREE_CODE (argument) == INDIRECT_REF)
12085 gcc_assert (REFERENCE_REF_P (argument));
12086 argument = TREE_OPERAND (argument, 0);
12089 /* If we're in a template, we represent a qualified-id referring
12090 to a static data member as a SCOPE_REF even if the scope isn't
12091 dependent so that we can check access control later. */
12093 if (TREE_CODE (probe) == SCOPE_REF)
12094 probe = TREE_OPERAND (probe, 1);
12095 if (TREE_CODE (probe) == VAR_DECL)
12097 /* A variable without external linkage might still be a
12098 valid constant-expression, so no error is issued here
12099 if the external-linkage check fails. */
12100 if (!address_p && !DECL_EXTERNAL_LINKAGE_P (probe))
12101 cp_parser_simulate_error (parser);
12103 else if (is_overloaded_fn (argument))
12104 /* All overloaded functions are allowed; if the external
12105 linkage test does not pass, an error will be issued
12109 && (TREE_CODE (argument) == OFFSET_REF
12110 || TREE_CODE (argument) == SCOPE_REF))
12111 /* A pointer-to-member. */
12113 else if (TREE_CODE (argument) == TEMPLATE_PARM_INDEX)
12116 cp_parser_simulate_error (parser);
12118 if (cp_parser_parse_definitely (parser))
12121 argument = build_x_unary_op (ADDR_EXPR, argument,
12122 tf_warning_or_error);
12127 /* If the argument started with "&", there are no other valid
12128 alternatives at this point. */
12131 cp_parser_error (parser, "invalid non-type template argument");
12132 return error_mark_node;
12135 /* If the argument wasn't successfully parsed as a type-id followed
12136 by '>>', the argument can only be a constant expression now.
12137 Otherwise, we try parsing the constant-expression tentatively,
12138 because the argument could really be a type-id. */
12140 cp_parser_parse_tentatively (parser);
12141 argument = cp_parser_constant_expression (parser,
12142 /*allow_non_constant_p=*/false,
12143 /*non_constant_p=*/NULL);
12144 argument = fold_non_dependent_expr (argument);
12145 if (!maybe_type_id)
12147 if (!cp_parser_next_token_ends_template_argument_p (parser))
12148 cp_parser_error (parser, "expected template-argument");
12149 if (cp_parser_parse_definitely (parser))
12151 /* We did our best to parse the argument as a non type-id, but that
12152 was the only alternative that matched (albeit with a '>' after
12153 it). We can assume it's just a typo from the user, and a
12154 diagnostic will then be issued. */
12155 return cp_parser_template_type_arg (parser);
12158 /* Parse an explicit-instantiation.
12160 explicit-instantiation:
12161 template declaration
12163 Although the standard says `declaration', what it really means is:
12165 explicit-instantiation:
12166 template decl-specifier-seq [opt] declarator [opt] ;
12168 Things like `template int S<int>::i = 5, int S<double>::j;' are not
12169 supposed to be allowed. A defect report has been filed about this
12174 explicit-instantiation:
12175 storage-class-specifier template
12176 decl-specifier-seq [opt] declarator [opt] ;
12177 function-specifier template
12178 decl-specifier-seq [opt] declarator [opt] ; */
12181 cp_parser_explicit_instantiation (cp_parser* parser)
12183 int declares_class_or_enum;
12184 cp_decl_specifier_seq decl_specifiers;
12185 tree extension_specifier = NULL_TREE;
12187 timevar_push (TV_TEMPLATE_INST);
12189 /* Look for an (optional) storage-class-specifier or
12190 function-specifier. */
12191 if (cp_parser_allow_gnu_extensions_p (parser))
12193 extension_specifier
12194 = cp_parser_storage_class_specifier_opt (parser);
12195 if (!extension_specifier)
12196 extension_specifier
12197 = cp_parser_function_specifier_opt (parser,
12198 /*decl_specs=*/NULL);
12201 /* Look for the `template' keyword. */
12202 cp_parser_require_keyword (parser, RID_TEMPLATE, RT_TEMPLATE);
12203 /* Let the front end know that we are processing an explicit
12205 begin_explicit_instantiation ();
12206 /* [temp.explicit] says that we are supposed to ignore access
12207 control while processing explicit instantiation directives. */
12208 push_deferring_access_checks (dk_no_check);
12209 /* Parse a decl-specifier-seq. */
12210 cp_parser_decl_specifier_seq (parser,
12211 CP_PARSER_FLAGS_OPTIONAL,
12213 &declares_class_or_enum);
12214 /* If there was exactly one decl-specifier, and it declared a class,
12215 and there's no declarator, then we have an explicit type
12217 if (declares_class_or_enum && cp_parser_declares_only_class_p (parser))
12221 type = check_tag_decl (&decl_specifiers);
12222 /* Turn access control back on for names used during
12223 template instantiation. */
12224 pop_deferring_access_checks ();
12226 do_type_instantiation (type, extension_specifier,
12227 /*complain=*/tf_error);
12231 cp_declarator *declarator;
12234 /* Parse the declarator. */
12236 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
12237 /*ctor_dtor_or_conv_p=*/NULL,
12238 /*parenthesized_p=*/NULL,
12239 /*member_p=*/false);
12240 if (declares_class_or_enum & 2)
12241 cp_parser_check_for_definition_in_return_type (declarator,
12242 decl_specifiers.type,
12243 decl_specifiers.type_location);
12244 if (declarator != cp_error_declarator)
12246 if (decl_specifiers.specs[(int)ds_inline])
12247 permerror (input_location, "explicit instantiation shall not use"
12248 " %<inline%> specifier");
12249 if (decl_specifiers.specs[(int)ds_constexpr])
12250 permerror (input_location, "explicit instantiation shall not use"
12251 " %<constexpr%> specifier");
12253 decl = grokdeclarator (declarator, &decl_specifiers,
12254 NORMAL, 0, &decl_specifiers.attributes);
12255 /* Turn access control back on for names used during
12256 template instantiation. */
12257 pop_deferring_access_checks ();
12258 /* Do the explicit instantiation. */
12259 do_decl_instantiation (decl, extension_specifier);
12263 pop_deferring_access_checks ();
12264 /* Skip the body of the explicit instantiation. */
12265 cp_parser_skip_to_end_of_statement (parser);
12268 /* We're done with the instantiation. */
12269 end_explicit_instantiation ();
12271 cp_parser_consume_semicolon_at_end_of_statement (parser);
12273 timevar_pop (TV_TEMPLATE_INST);
12276 /* Parse an explicit-specialization.
12278 explicit-specialization:
12279 template < > declaration
12281 Although the standard says `declaration', what it really means is:
12283 explicit-specialization:
12284 template <> decl-specifier [opt] init-declarator [opt] ;
12285 template <> function-definition
12286 template <> explicit-specialization
12287 template <> template-declaration */
12290 cp_parser_explicit_specialization (cp_parser* parser)
12292 bool need_lang_pop;
12293 cp_token *token = cp_lexer_peek_token (parser->lexer);
12295 /* Look for the `template' keyword. */
12296 cp_parser_require_keyword (parser, RID_TEMPLATE, RT_TEMPLATE);
12297 /* Look for the `<'. */
12298 cp_parser_require (parser, CPP_LESS, RT_LESS);
12299 /* Look for the `>'. */
12300 cp_parser_require (parser, CPP_GREATER, RT_GREATER);
12301 /* We have processed another parameter list. */
12302 ++parser->num_template_parameter_lists;
12305 A template ... explicit specialization ... shall not have C
12307 if (current_lang_name == lang_name_c)
12309 error_at (token->location, "template specialization with C linkage");
12310 /* Give it C++ linkage to avoid confusing other parts of the
12312 push_lang_context (lang_name_cplusplus);
12313 need_lang_pop = true;
12316 need_lang_pop = false;
12317 /* Let the front end know that we are beginning a specialization. */
12318 if (!begin_specialization ())
12320 end_specialization ();
12324 /* If the next keyword is `template', we need to figure out whether
12325 or not we're looking a template-declaration. */
12326 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
12328 if (cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_LESS
12329 && cp_lexer_peek_nth_token (parser->lexer, 3)->type != CPP_GREATER)
12330 cp_parser_template_declaration_after_export (parser,
12331 /*member_p=*/false);
12333 cp_parser_explicit_specialization (parser);
12336 /* Parse the dependent declaration. */
12337 cp_parser_single_declaration (parser,
12339 /*member_p=*/false,
12340 /*explicit_specialization_p=*/true,
12341 /*friend_p=*/NULL);
12342 /* We're done with the specialization. */
12343 end_specialization ();
12344 /* For the erroneous case of a template with C linkage, we pushed an
12345 implicit C++ linkage scope; exit that scope now. */
12347 pop_lang_context ();
12348 /* We're done with this parameter list. */
12349 --parser->num_template_parameter_lists;
12352 /* Parse a type-specifier.
12355 simple-type-specifier
12358 elaborated-type-specifier
12366 Returns a representation of the type-specifier. For a
12367 class-specifier, enum-specifier, or elaborated-type-specifier, a
12368 TREE_TYPE is returned; otherwise, a TYPE_DECL is returned.
12370 The parser flags FLAGS is used to control type-specifier parsing.
12372 If IS_DECLARATION is TRUE, then this type-specifier is appearing
12373 in a decl-specifier-seq.
12375 If DECLARES_CLASS_OR_ENUM is non-NULL, and the type-specifier is a
12376 class-specifier, enum-specifier, or elaborated-type-specifier, then
12377 *DECLARES_CLASS_OR_ENUM is set to a nonzero value. The value is 1
12378 if a type is declared; 2 if it is defined. Otherwise, it is set to
12381 If IS_CV_QUALIFIER is non-NULL, and the type-specifier is a
12382 cv-qualifier, then IS_CV_QUALIFIER is set to TRUE. Otherwise, it
12383 is set to FALSE. */
12386 cp_parser_type_specifier (cp_parser* parser,
12387 cp_parser_flags flags,
12388 cp_decl_specifier_seq *decl_specs,
12389 bool is_declaration,
12390 int* declares_class_or_enum,
12391 bool* is_cv_qualifier)
12393 tree type_spec = NULL_TREE;
12396 cp_decl_spec ds = ds_last;
12398 /* Assume this type-specifier does not declare a new type. */
12399 if (declares_class_or_enum)
12400 *declares_class_or_enum = 0;
12401 /* And that it does not specify a cv-qualifier. */
12402 if (is_cv_qualifier)
12403 *is_cv_qualifier = false;
12404 /* Peek at the next token. */
12405 token = cp_lexer_peek_token (parser->lexer);
12407 /* If we're looking at a keyword, we can use that to guide the
12408 production we choose. */
12409 keyword = token->keyword;
12413 if ((flags & CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS))
12414 goto elaborated_type_specifier;
12416 /* Look for the enum-specifier. */
12417 type_spec = cp_parser_enum_specifier (parser);
12418 /* If that worked, we're done. */
12421 if (declares_class_or_enum)
12422 *declares_class_or_enum = 2;
12424 cp_parser_set_decl_spec_type (decl_specs,
12427 /*user_defined_p=*/true);
12431 goto elaborated_type_specifier;
12433 /* Any of these indicate either a class-specifier, or an
12434 elaborated-type-specifier. */
12438 if ((flags & CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS))
12439 goto elaborated_type_specifier;
12441 /* Parse tentatively so that we can back up if we don't find a
12442 class-specifier. */
12443 cp_parser_parse_tentatively (parser);
12444 /* Look for the class-specifier. */
12445 type_spec = cp_parser_class_specifier (parser);
12446 invoke_plugin_callbacks (PLUGIN_FINISH_TYPE, type_spec);
12447 /* If that worked, we're done. */
12448 if (cp_parser_parse_definitely (parser))
12450 if (declares_class_or_enum)
12451 *declares_class_or_enum = 2;
12453 cp_parser_set_decl_spec_type (decl_specs,
12456 /*user_defined_p=*/true);
12460 /* Fall through. */
12461 elaborated_type_specifier:
12462 /* We're declaring (not defining) a class or enum. */
12463 if (declares_class_or_enum)
12464 *declares_class_or_enum = 1;
12466 /* Fall through. */
12468 /* Look for an elaborated-type-specifier. */
12470 = (cp_parser_elaborated_type_specifier
12472 decl_specs && decl_specs->specs[(int) ds_friend],
12475 cp_parser_set_decl_spec_type (decl_specs,
12478 /*user_defined_p=*/true);
12483 if (is_cv_qualifier)
12484 *is_cv_qualifier = true;
12489 if (is_cv_qualifier)
12490 *is_cv_qualifier = true;
12495 if (is_cv_qualifier)
12496 *is_cv_qualifier = true;
12500 /* The `__complex__' keyword is a GNU extension. */
12508 /* Handle simple keywords. */
12513 ++decl_specs->specs[(int)ds];
12514 decl_specs->any_specifiers_p = true;
12516 return cp_lexer_consume_token (parser->lexer)->u.value;
12519 /* If we do not already have a type-specifier, assume we are looking
12520 at a simple-type-specifier. */
12521 type_spec = cp_parser_simple_type_specifier (parser,
12525 /* If we didn't find a type-specifier, and a type-specifier was not
12526 optional in this context, issue an error message. */
12527 if (!type_spec && !(flags & CP_PARSER_FLAGS_OPTIONAL))
12529 cp_parser_error (parser, "expected type specifier");
12530 return error_mark_node;
12536 /* Parse a simple-type-specifier.
12538 simple-type-specifier:
12539 :: [opt] nested-name-specifier [opt] type-name
12540 :: [opt] nested-name-specifier template template-id
12555 simple-type-specifier:
12557 decltype ( expression )
12560 __underlying_type ( type-id )
12564 simple-type-specifier:
12566 __typeof__ unary-expression
12567 __typeof__ ( type-id )
12569 Returns the indicated TYPE_DECL. If DECL_SPECS is not NULL, it is
12570 appropriately updated. */
12573 cp_parser_simple_type_specifier (cp_parser* parser,
12574 cp_decl_specifier_seq *decl_specs,
12575 cp_parser_flags flags)
12577 tree type = NULL_TREE;
12580 /* Peek at the next token. */
12581 token = cp_lexer_peek_token (parser->lexer);
12583 /* If we're looking at a keyword, things are easy. */
12584 switch (token->keyword)
12588 decl_specs->explicit_char_p = true;
12589 type = char_type_node;
12592 type = char16_type_node;
12595 type = char32_type_node;
12598 type = wchar_type_node;
12601 type = boolean_type_node;
12605 ++decl_specs->specs[(int) ds_short];
12606 type = short_integer_type_node;
12610 decl_specs->explicit_int_p = true;
12611 type = integer_type_node;
12614 if (!int128_integer_type_node)
12617 decl_specs->explicit_int128_p = true;
12618 type = int128_integer_type_node;
12622 ++decl_specs->specs[(int) ds_long];
12623 type = long_integer_type_node;
12627 ++decl_specs->specs[(int) ds_signed];
12628 type = integer_type_node;
12632 ++decl_specs->specs[(int) ds_unsigned];
12633 type = unsigned_type_node;
12636 type = float_type_node;
12639 type = double_type_node;
12642 type = void_type_node;
12646 maybe_warn_cpp0x (CPP0X_AUTO);
12647 type = make_auto ();
12651 /* Parse the `decltype' type. */
12652 type = cp_parser_decltype (parser);
12655 cp_parser_set_decl_spec_type (decl_specs, type,
12657 /*user_defined_p=*/true);
12662 /* Consume the `typeof' token. */
12663 cp_lexer_consume_token (parser->lexer);
12664 /* Parse the operand to `typeof'. */
12665 type = cp_parser_sizeof_operand (parser, RID_TYPEOF);
12666 /* If it is not already a TYPE, take its type. */
12667 if (!TYPE_P (type))
12668 type = finish_typeof (type);
12671 cp_parser_set_decl_spec_type (decl_specs, type,
12673 /*user_defined_p=*/true);
12677 case RID_UNDERLYING_TYPE:
12678 type = cp_parser_trait_expr (parser, RID_UNDERLYING_TYPE);
12681 cp_parser_set_decl_spec_type (decl_specs, type,
12683 /*user_defined_p=*/true);
12691 /* If the type-specifier was for a built-in type, we're done. */
12694 /* Record the type. */
12696 && (token->keyword != RID_SIGNED
12697 && token->keyword != RID_UNSIGNED
12698 && token->keyword != RID_SHORT
12699 && token->keyword != RID_LONG))
12700 cp_parser_set_decl_spec_type (decl_specs,
12703 /*user_defined=*/false);
12705 decl_specs->any_specifiers_p = true;
12707 /* Consume the token. */
12708 cp_lexer_consume_token (parser->lexer);
12710 /* There is no valid C++ program where a non-template type is
12711 followed by a "<". That usually indicates that the user thought
12712 that the type was a template. */
12713 cp_parser_check_for_invalid_template_id (parser, type, token->location);
12715 return TYPE_NAME (type);
12718 /* The type-specifier must be a user-defined type. */
12719 if (!(flags & CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES))
12724 /* Don't gobble tokens or issue error messages if this is an
12725 optional type-specifier. */
12726 if (flags & CP_PARSER_FLAGS_OPTIONAL)
12727 cp_parser_parse_tentatively (parser);
12729 /* Look for the optional `::' operator. */
12731 = (cp_parser_global_scope_opt (parser,
12732 /*current_scope_valid_p=*/false)
12734 /* Look for the nested-name specifier. */
12736 = (cp_parser_nested_name_specifier_opt (parser,
12737 /*typename_keyword_p=*/false,
12738 /*check_dependency_p=*/true,
12740 /*is_declaration=*/false)
12742 token = cp_lexer_peek_token (parser->lexer);
12743 /* If we have seen a nested-name-specifier, and the next token
12744 is `template', then we are using the template-id production. */
12746 && cp_parser_optional_template_keyword (parser))
12748 /* Look for the template-id. */
12749 type = cp_parser_template_id (parser,
12750 /*template_keyword_p=*/true,
12751 /*check_dependency_p=*/true,
12752 /*is_declaration=*/false);
12753 /* If the template-id did not name a type, we are out of
12755 if (TREE_CODE (type) != TYPE_DECL)
12757 cp_parser_error (parser, "expected template-id for type");
12761 /* Otherwise, look for a type-name. */
12763 type = cp_parser_type_name (parser);
12764 /* Keep track of all name-lookups performed in class scopes. */
12768 && TREE_CODE (type) == TYPE_DECL
12769 && TREE_CODE (DECL_NAME (type)) == IDENTIFIER_NODE)
12770 maybe_note_name_used_in_class (DECL_NAME (type), type);
12771 /* If it didn't work out, we don't have a TYPE. */
12772 if ((flags & CP_PARSER_FLAGS_OPTIONAL)
12773 && !cp_parser_parse_definitely (parser))
12775 if (type && decl_specs)
12776 cp_parser_set_decl_spec_type (decl_specs, type,
12778 /*user_defined=*/true);
12781 /* If we didn't get a type-name, issue an error message. */
12782 if (!type && !(flags & CP_PARSER_FLAGS_OPTIONAL))
12784 cp_parser_error (parser, "expected type-name");
12785 return error_mark_node;
12788 if (type && type != error_mark_node)
12790 /* See if TYPE is an Objective-C type, and if so, parse and
12791 accept any protocol references following it. Do this before
12792 the cp_parser_check_for_invalid_template_id() call, because
12793 Objective-C types can be followed by '<...>' which would
12794 enclose protocol names rather than template arguments, and so
12795 everything is fine. */
12796 if (c_dialect_objc () && !parser->scope
12797 && (objc_is_id (type) || objc_is_class_name (type)))
12799 tree protos = cp_parser_objc_protocol_refs_opt (parser);
12800 tree qual_type = objc_get_protocol_qualified_type (type, protos);
12802 /* Clobber the "unqualified" type previously entered into
12803 DECL_SPECS with the new, improved protocol-qualified version. */
12805 decl_specs->type = qual_type;
12810 /* There is no valid C++ program where a non-template type is
12811 followed by a "<". That usually indicates that the user
12812 thought that the type was a template. */
12813 cp_parser_check_for_invalid_template_id (parser, TREE_TYPE (type),
12820 /* Parse a type-name.
12833 Returns a TYPE_DECL for the type. */
12836 cp_parser_type_name (cp_parser* parser)
12840 /* We can't know yet whether it is a class-name or not. */
12841 cp_parser_parse_tentatively (parser);
12842 /* Try a class-name. */
12843 type_decl = cp_parser_class_name (parser,
12844 /*typename_keyword_p=*/false,
12845 /*template_keyword_p=*/false,
12847 /*check_dependency_p=*/true,
12848 /*class_head_p=*/false,
12849 /*is_declaration=*/false);
12850 /* If it's not a class-name, keep looking. */
12851 if (!cp_parser_parse_definitely (parser))
12853 /* It must be a typedef-name or an enum-name. */
12854 return cp_parser_nonclass_name (parser);
12860 /* Parse a non-class type-name, that is, either an enum-name or a typedef-name.
12868 Returns a TYPE_DECL for the type. */
12871 cp_parser_nonclass_name (cp_parser* parser)
12876 cp_token *token = cp_lexer_peek_token (parser->lexer);
12877 identifier = cp_parser_identifier (parser);
12878 if (identifier == error_mark_node)
12879 return error_mark_node;
12881 /* Look up the type-name. */
12882 type_decl = cp_parser_lookup_name_simple (parser, identifier, token->location);
12884 if (TREE_CODE (type_decl) != TYPE_DECL
12885 && (objc_is_id (identifier) || objc_is_class_name (identifier)))
12887 /* See if this is an Objective-C type. */
12888 tree protos = cp_parser_objc_protocol_refs_opt (parser);
12889 tree type = objc_get_protocol_qualified_type (identifier, protos);
12891 type_decl = TYPE_NAME (type);
12894 /* Issue an error if we did not find a type-name. */
12895 if (TREE_CODE (type_decl) != TYPE_DECL
12896 /* In Objective-C, we have the complication that class names are
12897 normally type names and start declarations (eg, the
12898 "NSObject" in "NSObject *object;"), but can be used in an
12899 Objective-C 2.0 dot-syntax (as in "NSObject.version") which
12900 is an expression. So, a classname followed by a dot is not a
12901 valid type-name. */
12902 || (objc_is_class_name (TREE_TYPE (type_decl))
12903 && cp_lexer_peek_token (parser->lexer)->type == CPP_DOT))
12905 if (!cp_parser_simulate_error (parser))
12906 cp_parser_name_lookup_error (parser, identifier, type_decl,
12907 NLE_TYPE, token->location);
12908 return error_mark_node;
12910 /* Remember that the name was used in the definition of the
12911 current class so that we can check later to see if the
12912 meaning would have been different after the class was
12913 entirely defined. */
12914 else if (type_decl != error_mark_node
12916 maybe_note_name_used_in_class (identifier, type_decl);
12921 /* Parse an elaborated-type-specifier. Note that the grammar given
12922 here incorporates the resolution to DR68.
12924 elaborated-type-specifier:
12925 class-key :: [opt] nested-name-specifier [opt] identifier
12926 class-key :: [opt] nested-name-specifier [opt] template [opt] template-id
12927 enum-key :: [opt] nested-name-specifier [opt] identifier
12928 typename :: [opt] nested-name-specifier identifier
12929 typename :: [opt] nested-name-specifier template [opt]
12934 elaborated-type-specifier:
12935 class-key attributes :: [opt] nested-name-specifier [opt] identifier
12936 class-key attributes :: [opt] nested-name-specifier [opt]
12937 template [opt] template-id
12938 enum attributes :: [opt] nested-name-specifier [opt] identifier
12940 If IS_FRIEND is TRUE, then this elaborated-type-specifier is being
12941 declared `friend'. If IS_DECLARATION is TRUE, then this
12942 elaborated-type-specifier appears in a decl-specifiers-seq, i.e.,
12943 something is being declared.
12945 Returns the TYPE specified. */
12948 cp_parser_elaborated_type_specifier (cp_parser* parser,
12950 bool is_declaration)
12952 enum tag_types tag_type;
12954 tree type = NULL_TREE;
12955 tree attributes = NULL_TREE;
12957 cp_token *token = NULL;
12959 /* See if we're looking at the `enum' keyword. */
12960 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_ENUM))
12962 /* Consume the `enum' token. */
12963 cp_lexer_consume_token (parser->lexer);
12964 /* Remember that it's an enumeration type. */
12965 tag_type = enum_type;
12966 /* Issue a warning if the `struct' or `class' key (for C++0x scoped
12967 enums) is used here. */
12968 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_CLASS)
12969 || cp_lexer_next_token_is_keyword (parser->lexer, RID_STRUCT))
12971 pedwarn (input_location, 0, "elaborated-type-specifier "
12972 "for a scoped enum must not use the %<%D%> keyword",
12973 cp_lexer_peek_token (parser->lexer)->u.value);
12974 /* Consume the `struct' or `class' and parse it anyway. */
12975 cp_lexer_consume_token (parser->lexer);
12977 /* Parse the attributes. */
12978 attributes = cp_parser_attributes_opt (parser);
12980 /* Or, it might be `typename'. */
12981 else if (cp_lexer_next_token_is_keyword (parser->lexer,
12984 /* Consume the `typename' token. */
12985 cp_lexer_consume_token (parser->lexer);
12986 /* Remember that it's a `typename' type. */
12987 tag_type = typename_type;
12989 /* Otherwise it must be a class-key. */
12992 tag_type = cp_parser_class_key (parser);
12993 if (tag_type == none_type)
12994 return error_mark_node;
12995 /* Parse the attributes. */
12996 attributes = cp_parser_attributes_opt (parser);
12999 /* Look for the `::' operator. */
13000 globalscope = cp_parser_global_scope_opt (parser,
13001 /*current_scope_valid_p=*/false);
13002 /* Look for the nested-name-specifier. */
13003 if (tag_type == typename_type && !globalscope)
13005 if (!cp_parser_nested_name_specifier (parser,
13006 /*typename_keyword_p=*/true,
13007 /*check_dependency_p=*/true,
13010 return error_mark_node;
13013 /* Even though `typename' is not present, the proposed resolution
13014 to Core Issue 180 says that in `class A<T>::B', `B' should be
13015 considered a type-name, even if `A<T>' is dependent. */
13016 cp_parser_nested_name_specifier_opt (parser,
13017 /*typename_keyword_p=*/true,
13018 /*check_dependency_p=*/true,
13021 /* For everything but enumeration types, consider a template-id.
13022 For an enumeration type, consider only a plain identifier. */
13023 if (tag_type != enum_type)
13025 bool template_p = false;
13028 /* Allow the `template' keyword. */
13029 template_p = cp_parser_optional_template_keyword (parser);
13030 /* If we didn't see `template', we don't know if there's a
13031 template-id or not. */
13033 cp_parser_parse_tentatively (parser);
13034 /* Parse the template-id. */
13035 token = cp_lexer_peek_token (parser->lexer);
13036 decl = cp_parser_template_id (parser, template_p,
13037 /*check_dependency_p=*/true,
13039 /* If we didn't find a template-id, look for an ordinary
13041 if (!template_p && !cp_parser_parse_definitely (parser))
13043 /* If DECL is a TEMPLATE_ID_EXPR, and the `typename' keyword is
13044 in effect, then we must assume that, upon instantiation, the
13045 template will correspond to a class. */
13046 else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR
13047 && tag_type == typename_type)
13048 type = make_typename_type (parser->scope, decl,
13050 /*complain=*/tf_error);
13051 /* If the `typename' keyword is in effect and DECL is not a type
13052 decl. Then type is non existant. */
13053 else if (tag_type == typename_type && TREE_CODE (decl) != TYPE_DECL)
13056 type = TREE_TYPE (decl);
13061 token = cp_lexer_peek_token (parser->lexer);
13062 identifier = cp_parser_identifier (parser);
13064 if (identifier == error_mark_node)
13066 parser->scope = NULL_TREE;
13067 return error_mark_node;
13070 /* For a `typename', we needn't call xref_tag. */
13071 if (tag_type == typename_type
13072 && TREE_CODE (parser->scope) != NAMESPACE_DECL)
13073 return cp_parser_make_typename_type (parser, parser->scope,
13076 /* Look up a qualified name in the usual way. */
13080 tree ambiguous_decls;
13082 decl = cp_parser_lookup_name (parser, identifier,
13084 /*is_template=*/false,
13085 /*is_namespace=*/false,
13086 /*check_dependency=*/true,
13090 /* If the lookup was ambiguous, an error will already have been
13092 if (ambiguous_decls)
13093 return error_mark_node;
13095 /* If we are parsing friend declaration, DECL may be a
13096 TEMPLATE_DECL tree node here. However, we need to check
13097 whether this TEMPLATE_DECL results in valid code. Consider
13098 the following example:
13101 template <class T> class C {};
13104 template <class T> friend class N::C; // #1, valid code
13106 template <class T> class Y {
13107 friend class N::C; // #2, invalid code
13110 For both case #1 and #2, we arrive at a TEMPLATE_DECL after
13111 name lookup of `N::C'. We see that friend declaration must
13112 be template for the code to be valid. Note that
13113 processing_template_decl does not work here since it is
13114 always 1 for the above two cases. */
13116 decl = (cp_parser_maybe_treat_template_as_class
13117 (decl, /*tag_name_p=*/is_friend
13118 && parser->num_template_parameter_lists));
13120 if (TREE_CODE (decl) != TYPE_DECL)
13122 cp_parser_diagnose_invalid_type_name (parser,
13126 return error_mark_node;
13129 if (TREE_CODE (TREE_TYPE (decl)) != TYPENAME_TYPE)
13131 bool allow_template = (parser->num_template_parameter_lists
13132 || DECL_SELF_REFERENCE_P (decl));
13133 type = check_elaborated_type_specifier (tag_type, decl,
13136 if (type == error_mark_node)
13137 return error_mark_node;
13140 /* Forward declarations of nested types, such as
13145 are invalid unless all components preceding the final '::'
13146 are complete. If all enclosing types are complete, these
13147 declarations become merely pointless.
13149 Invalid forward declarations of nested types are errors
13150 caught elsewhere in parsing. Those that are pointless arrive
13153 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)
13154 && !is_friend && !processing_explicit_instantiation)
13155 warning (0, "declaration %qD does not declare anything", decl);
13157 type = TREE_TYPE (decl);
13161 /* An elaborated-type-specifier sometimes introduces a new type and
13162 sometimes names an existing type. Normally, the rule is that it
13163 introduces a new type only if there is not an existing type of
13164 the same name already in scope. For example, given:
13167 void f() { struct S s; }
13169 the `struct S' in the body of `f' is the same `struct S' as in
13170 the global scope; the existing definition is used. However, if
13171 there were no global declaration, this would introduce a new
13172 local class named `S'.
13174 An exception to this rule applies to the following code:
13176 namespace N { struct S; }
13178 Here, the elaborated-type-specifier names a new type
13179 unconditionally; even if there is already an `S' in the
13180 containing scope this declaration names a new type.
13181 This exception only applies if the elaborated-type-specifier
13182 forms the complete declaration:
13186 A declaration consisting solely of `class-key identifier ;' is
13187 either a redeclaration of the name in the current scope or a
13188 forward declaration of the identifier as a class name. It
13189 introduces the name into the current scope.
13191 We are in this situation precisely when the next token is a `;'.
13193 An exception to the exception is that a `friend' declaration does
13194 *not* name a new type; i.e., given:
13196 struct S { friend struct T; };
13198 `T' is not a new type in the scope of `S'.
13200 Also, `new struct S' or `sizeof (struct S)' never results in the
13201 definition of a new type; a new type can only be declared in a
13202 declaration context. */
13208 /* Friends have special name lookup rules. */
13209 ts = ts_within_enclosing_non_class;
13210 else if (is_declaration
13211 && cp_lexer_next_token_is (parser->lexer,
13213 /* This is a `class-key identifier ;' */
13219 (parser->num_template_parameter_lists
13220 && (cp_parser_next_token_starts_class_definition_p (parser)
13221 || cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)));
13222 /* An unqualified name was used to reference this type, so
13223 there were no qualifying templates. */
13224 if (!cp_parser_check_template_parameters (parser,
13225 /*num_templates=*/0,
13227 /*declarator=*/NULL))
13228 return error_mark_node;
13229 type = xref_tag (tag_type, identifier, ts, template_p);
13233 if (type == error_mark_node)
13234 return error_mark_node;
13236 /* Allow attributes on forward declarations of classes. */
13239 if (TREE_CODE (type) == TYPENAME_TYPE)
13240 warning (OPT_Wattributes,
13241 "attributes ignored on uninstantiated type");
13242 else if (tag_type != enum_type && CLASSTYPE_TEMPLATE_INSTANTIATION (type)
13243 && ! processing_explicit_instantiation)
13244 warning (OPT_Wattributes,
13245 "attributes ignored on template instantiation");
13246 else if (is_declaration && cp_parser_declares_only_class_p (parser))
13247 cplus_decl_attributes (&type, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE);
13249 warning (OPT_Wattributes,
13250 "attributes ignored on elaborated-type-specifier that is not a forward declaration");
13253 if (tag_type != enum_type)
13254 cp_parser_check_class_key (tag_type, type);
13256 /* A "<" cannot follow an elaborated type specifier. If that
13257 happens, the user was probably trying to form a template-id. */
13258 cp_parser_check_for_invalid_template_id (parser, type, token->location);
13263 /* Parse an enum-specifier.
13266 enum-head { enumerator-list [opt] }
13269 enum-key identifier [opt] enum-base [opt]
13270 enum-key nested-name-specifier identifier enum-base [opt]
13275 enum struct [C++0x]
13278 : type-specifier-seq
13280 opaque-enum-specifier:
13281 enum-key identifier enum-base [opt] ;
13284 enum-key attributes[opt] identifier [opt] enum-base [opt]
13285 { enumerator-list [opt] }attributes[opt]
13287 Returns an ENUM_TYPE representing the enumeration, or NULL_TREE
13288 if the token stream isn't an enum-specifier after all. */
13291 cp_parser_enum_specifier (cp_parser* parser)
13294 tree type = NULL_TREE;
13296 tree nested_name_specifier = NULL_TREE;
13298 bool scoped_enum_p = false;
13299 bool has_underlying_type = false;
13300 bool nested_being_defined = false;
13301 bool new_value_list = false;
13302 bool is_new_type = false;
13303 bool is_anonymous = false;
13304 tree underlying_type = NULL_TREE;
13305 cp_token *type_start_token = NULL;
13306 bool saved_colon_corrects_to_scope_p = parser->colon_corrects_to_scope_p;
13308 parser->colon_corrects_to_scope_p = false;
13310 /* Parse tentatively so that we can back up if we don't find a
13312 cp_parser_parse_tentatively (parser);
13314 /* Caller guarantees that the current token is 'enum', an identifier
13315 possibly follows, and the token after that is an opening brace.
13316 If we don't have an identifier, fabricate an anonymous name for
13317 the enumeration being defined. */
13318 cp_lexer_consume_token (parser->lexer);
13320 /* Parse the "class" or "struct", which indicates a scoped
13321 enumeration type in C++0x. */
13322 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_CLASS)
13323 || cp_lexer_next_token_is_keyword (parser->lexer, RID_STRUCT))
13325 if (cxx_dialect < cxx0x)
13326 maybe_warn_cpp0x (CPP0X_SCOPED_ENUMS);
13328 /* Consume the `struct' or `class' token. */
13329 cp_lexer_consume_token (parser->lexer);
13331 scoped_enum_p = true;
13334 attributes = cp_parser_attributes_opt (parser);
13336 /* Clear the qualification. */
13337 parser->scope = NULL_TREE;
13338 parser->qualifying_scope = NULL_TREE;
13339 parser->object_scope = NULL_TREE;
13341 /* Figure out in what scope the declaration is being placed. */
13342 prev_scope = current_scope ();
13344 type_start_token = cp_lexer_peek_token (parser->lexer);
13346 push_deferring_access_checks (dk_no_check);
13347 nested_name_specifier
13348 = cp_parser_nested_name_specifier_opt (parser,
13349 /*typename_keyword_p=*/true,
13350 /*check_dependency_p=*/false,
13352 /*is_declaration=*/false);
13354 if (nested_name_specifier)
13358 identifier = cp_parser_identifier (parser);
13359 name = cp_parser_lookup_name (parser, identifier,
13361 /*is_template=*/false,
13362 /*is_namespace=*/false,
13363 /*check_dependency=*/true,
13364 /*ambiguous_decls=*/NULL,
13368 type = TREE_TYPE (name);
13369 if (TREE_CODE (type) == TYPENAME_TYPE)
13371 /* Are template enums allowed in ISO? */
13372 if (template_parm_scope_p ())
13373 pedwarn (type_start_token->location, OPT_pedantic,
13374 "%qD is an enumeration template", name);
13375 /* ignore a typename reference, for it will be solved by name
13381 error_at (type_start_token->location,
13382 "%qD is not an enumerator-name", identifier);
13386 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
13387 identifier = cp_parser_identifier (parser);
13390 identifier = make_anon_name ();
13391 is_anonymous = true;
13394 pop_deferring_access_checks ();
13396 /* Check for the `:' that denotes a specified underlying type in C++0x.
13397 Note that a ':' could also indicate a bitfield width, however. */
13398 if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
13400 cp_decl_specifier_seq type_specifiers;
13402 /* Consume the `:'. */
13403 cp_lexer_consume_token (parser->lexer);
13405 /* Parse the type-specifier-seq. */
13406 cp_parser_type_specifier_seq (parser, /*is_declaration=*/false,
13407 /*is_trailing_return=*/false,
13410 /* At this point this is surely not elaborated type specifier. */
13411 if (!cp_parser_parse_definitely (parser))
13414 if (cxx_dialect < cxx0x)
13415 maybe_warn_cpp0x (CPP0X_SCOPED_ENUMS);
13417 has_underlying_type = true;
13419 /* If that didn't work, stop. */
13420 if (type_specifiers.type != error_mark_node)
13422 underlying_type = grokdeclarator (NULL, &type_specifiers, TYPENAME,
13423 /*initialized=*/0, NULL);
13424 if (underlying_type == error_mark_node)
13425 underlying_type = NULL_TREE;
13429 /* Look for the `{' but don't consume it yet. */
13430 if (!cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
13432 if (cxx_dialect < cxx0x || (!scoped_enum_p && !underlying_type))
13434 cp_parser_error (parser, "expected %<{%>");
13435 if (has_underlying_type)
13441 /* An opaque-enum-specifier must have a ';' here. */
13442 if ((scoped_enum_p || underlying_type)
13443 && cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
13445 cp_parser_error (parser, "expected %<;%> or %<{%>");
13446 if (has_underlying_type)
13454 if (!has_underlying_type && !cp_parser_parse_definitely (parser))
13457 if (nested_name_specifier)
13459 if (CLASS_TYPE_P (nested_name_specifier))
13461 nested_being_defined = TYPE_BEING_DEFINED (nested_name_specifier);
13462 TYPE_BEING_DEFINED (nested_name_specifier) = 1;
13463 push_scope (nested_name_specifier);
13465 else if (TREE_CODE (nested_name_specifier) == NAMESPACE_DECL)
13467 push_nested_namespace (nested_name_specifier);
13471 /* Issue an error message if type-definitions are forbidden here. */
13472 if (!cp_parser_check_type_definition (parser))
13473 type = error_mark_node;
13475 /* Create the new type. We do this before consuming the opening
13476 brace so the enum will be recorded as being on the line of its
13477 tag (or the 'enum' keyword, if there is no tag). */
13478 type = start_enum (identifier, type, underlying_type,
13479 scoped_enum_p, &is_new_type);
13481 /* If the next token is not '{' it is an opaque-enum-specifier or an
13482 elaborated-type-specifier. */
13483 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
13485 timevar_push (TV_PARSE_ENUM);
13486 if (nested_name_specifier)
13488 /* The following catches invalid code such as:
13489 enum class S<int>::E { A, B, C }; */
13490 if (!processing_specialization
13491 && CLASS_TYPE_P (nested_name_specifier)
13492 && CLASSTYPE_USE_TEMPLATE (nested_name_specifier))
13493 error_at (type_start_token->location, "cannot add an enumerator "
13494 "list to a template instantiation");
13496 /* If that scope does not contain the scope in which the
13497 class was originally declared, the program is invalid. */
13498 if (prev_scope && !is_ancestor (prev_scope, nested_name_specifier))
13500 if (at_namespace_scope_p ())
13501 error_at (type_start_token->location,
13502 "declaration of %qD in namespace %qD which does not "
13504 type, prev_scope, nested_name_specifier);
13506 error_at (type_start_token->location,
13507 "declaration of %qD in %qD which does not enclose %qD",
13508 type, prev_scope, nested_name_specifier);
13509 type = error_mark_node;
13514 begin_scope (sk_scoped_enum, type);
13516 /* Consume the opening brace. */
13517 cp_lexer_consume_token (parser->lexer);
13519 if (type == error_mark_node)
13520 ; /* Nothing to add */
13521 else if (OPAQUE_ENUM_P (type)
13522 || (cxx_dialect > cxx98 && processing_specialization))
13524 new_value_list = true;
13525 SET_OPAQUE_ENUM_P (type, false);
13526 DECL_SOURCE_LOCATION (TYPE_NAME (type)) = type_start_token->location;
13530 error_at (type_start_token->location, "multiple definition of %q#T", type);
13531 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
13532 "previous definition here");
13533 type = error_mark_node;
13536 if (type == error_mark_node)
13537 cp_parser_skip_to_end_of_block_or_statement (parser);
13538 /* If the next token is not '}', then there are some enumerators. */
13539 else if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_BRACE))
13540 cp_parser_enumerator_list (parser, type);
13542 /* Consume the final '}'. */
13543 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
13547 timevar_pop (TV_PARSE_ENUM);
13551 /* If a ';' follows, then it is an opaque-enum-specifier
13552 and additional restrictions apply. */
13553 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
13556 error_at (type_start_token->location,
13557 "opaque-enum-specifier without name");
13558 else if (nested_name_specifier)
13559 error_at (type_start_token->location,
13560 "opaque-enum-specifier must use a simple identifier");
13564 /* Look for trailing attributes to apply to this enumeration, and
13565 apply them if appropriate. */
13566 if (cp_parser_allow_gnu_extensions_p (parser))
13568 tree trailing_attr = cp_parser_attributes_opt (parser);
13569 trailing_attr = chainon (trailing_attr, attributes);
13570 cplus_decl_attributes (&type,
13572 (int) ATTR_FLAG_TYPE_IN_PLACE);
13575 /* Finish up the enumeration. */
13576 if (type != error_mark_node)
13578 if (new_value_list)
13579 finish_enum_value_list (type);
13581 finish_enum (type);
13584 if (nested_name_specifier)
13586 if (CLASS_TYPE_P (nested_name_specifier))
13588 TYPE_BEING_DEFINED (nested_name_specifier) = nested_being_defined;
13589 pop_scope (nested_name_specifier);
13591 else if (TREE_CODE (nested_name_specifier) == NAMESPACE_DECL)
13593 pop_nested_namespace (nested_name_specifier);
13597 parser->colon_corrects_to_scope_p = saved_colon_corrects_to_scope_p;
13601 /* Parse an enumerator-list. The enumerators all have the indicated
13605 enumerator-definition
13606 enumerator-list , enumerator-definition */
13609 cp_parser_enumerator_list (cp_parser* parser, tree type)
13613 /* Parse an enumerator-definition. */
13614 cp_parser_enumerator_definition (parser, type);
13616 /* If the next token is not a ',', we've reached the end of
13618 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
13620 /* Otherwise, consume the `,' and keep going. */
13621 cp_lexer_consume_token (parser->lexer);
13622 /* If the next token is a `}', there is a trailing comma. */
13623 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
13625 if (!in_system_header)
13626 pedwarn (input_location, OPT_pedantic, "comma at end of enumerator list");
13632 /* Parse an enumerator-definition. The enumerator has the indicated
13635 enumerator-definition:
13637 enumerator = constant-expression
13643 cp_parser_enumerator_definition (cp_parser* parser, tree type)
13649 /* Save the input location because we are interested in the location
13650 of the identifier and not the location of the explicit value. */
13651 loc = cp_lexer_peek_token (parser->lexer)->location;
13653 /* Look for the identifier. */
13654 identifier = cp_parser_identifier (parser);
13655 if (identifier == error_mark_node)
13658 /* If the next token is an '=', then there is an explicit value. */
13659 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
13661 /* Consume the `=' token. */
13662 cp_lexer_consume_token (parser->lexer);
13663 /* Parse the value. */
13664 value = cp_parser_constant_expression (parser,
13665 /*allow_non_constant_p=*/false,
13671 /* If we are processing a template, make sure the initializer of the
13672 enumerator doesn't contain any bare template parameter pack. */
13673 if (check_for_bare_parameter_packs (value))
13674 value = error_mark_node;
13676 /* integral_constant_value will pull out this expression, so make sure
13677 it's folded as appropriate. */
13678 value = fold_non_dependent_expr (value);
13680 /* Create the enumerator. */
13681 build_enumerator (identifier, value, type, loc);
13684 /* Parse a namespace-name.
13687 original-namespace-name
13690 Returns the NAMESPACE_DECL for the namespace. */
13693 cp_parser_namespace_name (cp_parser* parser)
13696 tree namespace_decl;
13698 cp_token *token = cp_lexer_peek_token (parser->lexer);
13700 /* Get the name of the namespace. */
13701 identifier = cp_parser_identifier (parser);
13702 if (identifier == error_mark_node)
13703 return error_mark_node;
13705 /* Look up the identifier in the currently active scope. Look only
13706 for namespaces, due to:
13708 [basic.lookup.udir]
13710 When looking up a namespace-name in a using-directive or alias
13711 definition, only namespace names are considered.
13715 [basic.lookup.qual]
13717 During the lookup of a name preceding the :: scope resolution
13718 operator, object, function, and enumerator names are ignored.
13720 (Note that cp_parser_qualifying_entity only calls this
13721 function if the token after the name is the scope resolution
13723 namespace_decl = cp_parser_lookup_name (parser, identifier,
13725 /*is_template=*/false,
13726 /*is_namespace=*/true,
13727 /*check_dependency=*/true,
13728 /*ambiguous_decls=*/NULL,
13730 /* If it's not a namespace, issue an error. */
13731 if (namespace_decl == error_mark_node
13732 || TREE_CODE (namespace_decl) != NAMESPACE_DECL)
13734 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
13735 error_at (token->location, "%qD is not a namespace-name", identifier);
13736 cp_parser_error (parser, "expected namespace-name");
13737 namespace_decl = error_mark_node;
13740 return namespace_decl;
13743 /* Parse a namespace-definition.
13745 namespace-definition:
13746 named-namespace-definition
13747 unnamed-namespace-definition
13749 named-namespace-definition:
13750 original-namespace-definition
13751 extension-namespace-definition
13753 original-namespace-definition:
13754 namespace identifier { namespace-body }
13756 extension-namespace-definition:
13757 namespace original-namespace-name { namespace-body }
13759 unnamed-namespace-definition:
13760 namespace { namespace-body } */
13763 cp_parser_namespace_definition (cp_parser* parser)
13765 tree identifier, attribs;
13766 bool has_visibility;
13769 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_INLINE))
13771 maybe_warn_cpp0x (CPP0X_INLINE_NAMESPACES);
13773 cp_lexer_consume_token (parser->lexer);
13778 /* Look for the `namespace' keyword. */
13779 cp_parser_require_keyword (parser, RID_NAMESPACE, RT_NAMESPACE);
13781 /* Get the name of the namespace. We do not attempt to distinguish
13782 between an original-namespace-definition and an
13783 extension-namespace-definition at this point. The semantic
13784 analysis routines are responsible for that. */
13785 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
13786 identifier = cp_parser_identifier (parser);
13788 identifier = NULL_TREE;
13790 /* Parse any specified attributes. */
13791 attribs = cp_parser_attributes_opt (parser);
13793 /* Look for the `{' to start the namespace. */
13794 cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE);
13795 /* Start the namespace. */
13796 push_namespace (identifier);
13798 /* "inline namespace" is equivalent to a stub namespace definition
13799 followed by a strong using directive. */
13802 tree name_space = current_namespace;
13803 /* Set up namespace association. */
13804 DECL_NAMESPACE_ASSOCIATIONS (name_space)
13805 = tree_cons (CP_DECL_CONTEXT (name_space), NULL_TREE,
13806 DECL_NAMESPACE_ASSOCIATIONS (name_space));
13807 /* Import the contents of the inline namespace. */
13809 do_using_directive (name_space);
13810 push_namespace (identifier);
13813 has_visibility = handle_namespace_attrs (current_namespace, attribs);
13815 /* Parse the body of the namespace. */
13816 cp_parser_namespace_body (parser);
13818 if (has_visibility)
13819 pop_visibility (1);
13821 /* Finish the namespace. */
13823 /* Look for the final `}'. */
13824 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
13827 /* Parse a namespace-body.
13830 declaration-seq [opt] */
13833 cp_parser_namespace_body (cp_parser* parser)
13835 cp_parser_declaration_seq_opt (parser);
13838 /* Parse a namespace-alias-definition.
13840 namespace-alias-definition:
13841 namespace identifier = qualified-namespace-specifier ; */
13844 cp_parser_namespace_alias_definition (cp_parser* parser)
13847 tree namespace_specifier;
13849 cp_token *token = cp_lexer_peek_token (parser->lexer);
13851 /* Look for the `namespace' keyword. */
13852 cp_parser_require_keyword (parser, RID_NAMESPACE, RT_NAMESPACE);
13853 /* Look for the identifier. */
13854 identifier = cp_parser_identifier (parser);
13855 if (identifier == error_mark_node)
13857 /* Look for the `=' token. */
13858 if (!cp_parser_uncommitted_to_tentative_parse_p (parser)
13859 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
13861 error_at (token->location, "%<namespace%> definition is not allowed here");
13862 /* Skip the definition. */
13863 cp_lexer_consume_token (parser->lexer);
13864 if (cp_parser_skip_to_closing_brace (parser))
13865 cp_lexer_consume_token (parser->lexer);
13868 cp_parser_require (parser, CPP_EQ, RT_EQ);
13869 /* Look for the qualified-namespace-specifier. */
13870 namespace_specifier
13871 = cp_parser_qualified_namespace_specifier (parser);
13872 /* Look for the `;' token. */
13873 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
13875 /* Register the alias in the symbol table. */
13876 do_namespace_alias (identifier, namespace_specifier);
13879 /* Parse a qualified-namespace-specifier.
13881 qualified-namespace-specifier:
13882 :: [opt] nested-name-specifier [opt] namespace-name
13884 Returns a NAMESPACE_DECL corresponding to the specified
13888 cp_parser_qualified_namespace_specifier (cp_parser* parser)
13890 /* Look for the optional `::'. */
13891 cp_parser_global_scope_opt (parser,
13892 /*current_scope_valid_p=*/false);
13894 /* Look for the optional nested-name-specifier. */
13895 cp_parser_nested_name_specifier_opt (parser,
13896 /*typename_keyword_p=*/false,
13897 /*check_dependency_p=*/true,
13899 /*is_declaration=*/true);
13901 return cp_parser_namespace_name (parser);
13904 /* Parse a using-declaration, or, if ACCESS_DECLARATION_P is true, an
13905 access declaration.
13908 using typename [opt] :: [opt] nested-name-specifier unqualified-id ;
13909 using :: unqualified-id ;
13911 access-declaration:
13917 cp_parser_using_declaration (cp_parser* parser,
13918 bool access_declaration_p)
13921 bool typename_p = false;
13922 bool global_scope_p;
13927 if (access_declaration_p)
13928 cp_parser_parse_tentatively (parser);
13931 /* Look for the `using' keyword. */
13932 cp_parser_require_keyword (parser, RID_USING, RT_USING);
13934 /* Peek at the next token. */
13935 token = cp_lexer_peek_token (parser->lexer);
13936 /* See if it's `typename'. */
13937 if (token->keyword == RID_TYPENAME)
13939 /* Remember that we've seen it. */
13941 /* Consume the `typename' token. */
13942 cp_lexer_consume_token (parser->lexer);
13946 /* Look for the optional global scope qualification. */
13948 = (cp_parser_global_scope_opt (parser,
13949 /*current_scope_valid_p=*/false)
13952 /* If we saw `typename', or didn't see `::', then there must be a
13953 nested-name-specifier present. */
13954 if (typename_p || !global_scope_p)
13955 qscope = cp_parser_nested_name_specifier (parser, typename_p,
13956 /*check_dependency_p=*/true,
13958 /*is_declaration=*/true);
13959 /* Otherwise, we could be in either of the two productions. In that
13960 case, treat the nested-name-specifier as optional. */
13962 qscope = cp_parser_nested_name_specifier_opt (parser,
13963 /*typename_keyword_p=*/false,
13964 /*check_dependency_p=*/true,
13966 /*is_declaration=*/true);
13968 qscope = global_namespace;
13970 if (access_declaration_p && cp_parser_error_occurred (parser))
13971 /* Something has already gone wrong; there's no need to parse
13972 further. Since an error has occurred, the return value of
13973 cp_parser_parse_definitely will be false, as required. */
13974 return cp_parser_parse_definitely (parser);
13976 token = cp_lexer_peek_token (parser->lexer);
13977 /* Parse the unqualified-id. */
13978 identifier = cp_parser_unqualified_id (parser,
13979 /*template_keyword_p=*/false,
13980 /*check_dependency_p=*/true,
13981 /*declarator_p=*/true,
13982 /*optional_p=*/false);
13984 if (access_declaration_p)
13986 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
13987 cp_parser_simulate_error (parser);
13988 if (!cp_parser_parse_definitely (parser))
13992 /* The function we call to handle a using-declaration is different
13993 depending on what scope we are in. */
13994 if (qscope == error_mark_node || identifier == error_mark_node)
13996 else if (TREE_CODE (identifier) != IDENTIFIER_NODE
13997 && TREE_CODE (identifier) != BIT_NOT_EXPR)
13998 /* [namespace.udecl]
14000 A using declaration shall not name a template-id. */
14001 error_at (token->location,
14002 "a template-id may not appear in a using-declaration");
14005 if (at_class_scope_p ())
14007 /* Create the USING_DECL. */
14008 decl = do_class_using_decl (parser->scope, identifier);
14010 if (check_for_bare_parameter_packs (decl))
14013 /* Add it to the list of members in this class. */
14014 finish_member_declaration (decl);
14018 decl = cp_parser_lookup_name_simple (parser,
14021 if (decl == error_mark_node)
14022 cp_parser_name_lookup_error (parser, identifier,
14025 else if (check_for_bare_parameter_packs (decl))
14027 else if (!at_namespace_scope_p ())
14028 do_local_using_decl (decl, qscope, identifier);
14030 do_toplevel_using_decl (decl, qscope, identifier);
14034 /* Look for the final `;'. */
14035 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
14040 /* Parse a using-directive.
14043 using namespace :: [opt] nested-name-specifier [opt]
14044 namespace-name ; */
14047 cp_parser_using_directive (cp_parser* parser)
14049 tree namespace_decl;
14052 /* Look for the `using' keyword. */
14053 cp_parser_require_keyword (parser, RID_USING, RT_USING);
14054 /* And the `namespace' keyword. */
14055 cp_parser_require_keyword (parser, RID_NAMESPACE, RT_NAMESPACE);
14056 /* Look for the optional `::' operator. */
14057 cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false);
14058 /* And the optional nested-name-specifier. */
14059 cp_parser_nested_name_specifier_opt (parser,
14060 /*typename_keyword_p=*/false,
14061 /*check_dependency_p=*/true,
14063 /*is_declaration=*/true);
14064 /* Get the namespace being used. */
14065 namespace_decl = cp_parser_namespace_name (parser);
14066 /* And any specified attributes. */
14067 attribs = cp_parser_attributes_opt (parser);
14068 /* Update the symbol table. */
14069 parse_using_directive (namespace_decl, attribs);
14070 /* Look for the final `;'. */
14071 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
14074 /* Parse an asm-definition.
14077 asm ( string-literal ) ;
14082 asm volatile [opt] ( string-literal ) ;
14083 asm volatile [opt] ( string-literal : asm-operand-list [opt] ) ;
14084 asm volatile [opt] ( string-literal : asm-operand-list [opt]
14085 : asm-operand-list [opt] ) ;
14086 asm volatile [opt] ( string-literal : asm-operand-list [opt]
14087 : asm-operand-list [opt]
14088 : asm-clobber-list [opt] ) ;
14089 asm volatile [opt] goto ( string-literal : : asm-operand-list [opt]
14090 : asm-clobber-list [opt]
14091 : asm-goto-list ) ; */
14094 cp_parser_asm_definition (cp_parser* parser)
14097 tree outputs = NULL_TREE;
14098 tree inputs = NULL_TREE;
14099 tree clobbers = NULL_TREE;
14100 tree labels = NULL_TREE;
14102 bool volatile_p = false;
14103 bool extended_p = false;
14104 bool invalid_inputs_p = false;
14105 bool invalid_outputs_p = false;
14106 bool goto_p = false;
14107 required_token missing = RT_NONE;
14109 /* Look for the `asm' keyword. */
14110 cp_parser_require_keyword (parser, RID_ASM, RT_ASM);
14111 /* See if the next token is `volatile'. */
14112 if (cp_parser_allow_gnu_extensions_p (parser)
14113 && cp_lexer_next_token_is_keyword (parser->lexer, RID_VOLATILE))
14115 /* Remember that we saw the `volatile' keyword. */
14117 /* Consume the token. */
14118 cp_lexer_consume_token (parser->lexer);
14120 if (cp_parser_allow_gnu_extensions_p (parser)
14121 && parser->in_function_body
14122 && cp_lexer_next_token_is_keyword (parser->lexer, RID_GOTO))
14124 /* Remember that we saw the `goto' keyword. */
14126 /* Consume the token. */
14127 cp_lexer_consume_token (parser->lexer);
14129 /* Look for the opening `('. */
14130 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
14132 /* Look for the string. */
14133 string = cp_parser_string_literal (parser, false, false);
14134 if (string == error_mark_node)
14136 cp_parser_skip_to_closing_parenthesis (parser, true, false,
14137 /*consume_paren=*/true);
14141 /* If we're allowing GNU extensions, check for the extended assembly
14142 syntax. Unfortunately, the `:' tokens need not be separated by
14143 a space in C, and so, for compatibility, we tolerate that here
14144 too. Doing that means that we have to treat the `::' operator as
14146 if (cp_parser_allow_gnu_extensions_p (parser)
14147 && parser->in_function_body
14148 && (cp_lexer_next_token_is (parser->lexer, CPP_COLON)
14149 || cp_lexer_next_token_is (parser->lexer, CPP_SCOPE)))
14151 bool inputs_p = false;
14152 bool clobbers_p = false;
14153 bool labels_p = false;
14155 /* The extended syntax was used. */
14158 /* Look for outputs. */
14159 if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
14161 /* Consume the `:'. */
14162 cp_lexer_consume_token (parser->lexer);
14163 /* Parse the output-operands. */
14164 if (cp_lexer_next_token_is_not (parser->lexer,
14166 && cp_lexer_next_token_is_not (parser->lexer,
14168 && cp_lexer_next_token_is_not (parser->lexer,
14171 outputs = cp_parser_asm_operand_list (parser);
14173 if (outputs == error_mark_node)
14174 invalid_outputs_p = true;
14176 /* If the next token is `::', there are no outputs, and the
14177 next token is the beginning of the inputs. */
14178 else if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
14179 /* The inputs are coming next. */
14182 /* Look for inputs. */
14184 || cp_lexer_next_token_is (parser->lexer, CPP_COLON))
14186 /* Consume the `:' or `::'. */
14187 cp_lexer_consume_token (parser->lexer);
14188 /* Parse the output-operands. */
14189 if (cp_lexer_next_token_is_not (parser->lexer,
14191 && cp_lexer_next_token_is_not (parser->lexer,
14193 && cp_lexer_next_token_is_not (parser->lexer,
14195 inputs = cp_parser_asm_operand_list (parser);
14197 if (inputs == error_mark_node)
14198 invalid_inputs_p = true;
14200 else if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
14201 /* The clobbers are coming next. */
14204 /* Look for clobbers. */
14206 || cp_lexer_next_token_is (parser->lexer, CPP_COLON))
14209 /* Consume the `:' or `::'. */
14210 cp_lexer_consume_token (parser->lexer);
14211 /* Parse the clobbers. */
14212 if (cp_lexer_next_token_is_not (parser->lexer,
14214 && cp_lexer_next_token_is_not (parser->lexer,
14216 clobbers = cp_parser_asm_clobber_list (parser);
14219 && cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
14220 /* The labels are coming next. */
14223 /* Look for labels. */
14225 || (goto_p && cp_lexer_next_token_is (parser->lexer, CPP_COLON)))
14228 /* Consume the `:' or `::'. */
14229 cp_lexer_consume_token (parser->lexer);
14230 /* Parse the labels. */
14231 labels = cp_parser_asm_label_list (parser);
14234 if (goto_p && !labels_p)
14235 missing = clobbers_p ? RT_COLON : RT_COLON_SCOPE;
14238 missing = RT_COLON_SCOPE;
14240 /* Look for the closing `)'. */
14241 if (!cp_parser_require (parser, missing ? CPP_COLON : CPP_CLOSE_PAREN,
14242 missing ? missing : RT_CLOSE_PAREN))
14243 cp_parser_skip_to_closing_parenthesis (parser, true, false,
14244 /*consume_paren=*/true);
14245 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
14247 if (!invalid_inputs_p && !invalid_outputs_p)
14249 /* Create the ASM_EXPR. */
14250 if (parser->in_function_body)
14252 asm_stmt = finish_asm_stmt (volatile_p, string, outputs,
14253 inputs, clobbers, labels);
14254 /* If the extended syntax was not used, mark the ASM_EXPR. */
14257 tree temp = asm_stmt;
14258 if (TREE_CODE (temp) == CLEANUP_POINT_EXPR)
14259 temp = TREE_OPERAND (temp, 0);
14261 ASM_INPUT_P (temp) = 1;
14265 cgraph_add_asm_node (string);
14269 /* Declarators [gram.dcl.decl] */
14271 /* Parse an init-declarator.
14274 declarator initializer [opt]
14279 declarator asm-specification [opt] attributes [opt] initializer [opt]
14281 function-definition:
14282 decl-specifier-seq [opt] declarator ctor-initializer [opt]
14284 decl-specifier-seq [opt] declarator function-try-block
14288 function-definition:
14289 __extension__ function-definition
14291 The DECL_SPECIFIERS apply to this declarator. Returns a
14292 representation of the entity declared. If MEMBER_P is TRUE, then
14293 this declarator appears in a class scope. The new DECL created by
14294 this declarator is returned.
14296 The CHECKS are access checks that should be performed once we know
14297 what entity is being declared (and, therefore, what classes have
14300 If FUNCTION_DEFINITION_ALLOWED_P then we handle the declarator and
14301 for a function-definition here as well. If the declarator is a
14302 declarator for a function-definition, *FUNCTION_DEFINITION_P will
14303 be TRUE upon return. By that point, the function-definition will
14304 have been completely parsed.
14306 FUNCTION_DEFINITION_P may be NULL if FUNCTION_DEFINITION_ALLOWED_P
14309 If MAYBE_RANGE_FOR_DECL is not NULL, the pointed tree will be set to the
14310 parsed declaration if it is an uninitialized single declarator not followed
14311 by a `;', or to error_mark_node otherwise. Either way, the trailing `;',
14312 if present, will not be consumed. If returned, this declarator will be
14313 created with SD_INITIALIZED but will not call cp_finish_decl. */
14316 cp_parser_init_declarator (cp_parser* parser,
14317 cp_decl_specifier_seq *decl_specifiers,
14318 VEC (deferred_access_check,gc)* checks,
14319 bool function_definition_allowed_p,
14321 int declares_class_or_enum,
14322 bool* function_definition_p,
14323 tree* maybe_range_for_decl)
14325 cp_token *token = NULL, *asm_spec_start_token = NULL,
14326 *attributes_start_token = NULL;
14327 cp_declarator *declarator;
14328 tree prefix_attributes;
14330 tree asm_specification;
14332 tree decl = NULL_TREE;
14334 int is_initialized;
14335 /* Only valid if IS_INITIALIZED is true. In that case, CPP_EQ if
14336 initialized with "= ..", CPP_OPEN_PAREN if initialized with
14338 enum cpp_ttype initialization_kind;
14339 bool is_direct_init = false;
14340 bool is_non_constant_init;
14341 int ctor_dtor_or_conv_p;
14343 tree pushed_scope = NULL_TREE;
14344 bool range_for_decl_p = false;
14346 /* Gather the attributes that were provided with the
14347 decl-specifiers. */
14348 prefix_attributes = decl_specifiers->attributes;
14350 /* Assume that this is not the declarator for a function
14352 if (function_definition_p)
14353 *function_definition_p = false;
14355 /* Defer access checks while parsing the declarator; we cannot know
14356 what names are accessible until we know what is being
14358 resume_deferring_access_checks ();
14360 /* Parse the declarator. */
14361 token = cp_lexer_peek_token (parser->lexer);
14363 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
14364 &ctor_dtor_or_conv_p,
14365 /*parenthesized_p=*/NULL,
14366 /*member_p=*/false);
14367 /* Gather up the deferred checks. */
14368 stop_deferring_access_checks ();
14370 /* If the DECLARATOR was erroneous, there's no need to go
14372 if (declarator == cp_error_declarator)
14373 return error_mark_node;
14375 /* Check that the number of template-parameter-lists is OK. */
14376 if (!cp_parser_check_declarator_template_parameters (parser, declarator,
14378 return error_mark_node;
14380 if (declares_class_or_enum & 2)
14381 cp_parser_check_for_definition_in_return_type (declarator,
14382 decl_specifiers->type,
14383 decl_specifiers->type_location);
14385 /* Figure out what scope the entity declared by the DECLARATOR is
14386 located in. `grokdeclarator' sometimes changes the scope, so
14387 we compute it now. */
14388 scope = get_scope_of_declarator (declarator);
14390 /* Perform any lookups in the declared type which were thought to be
14391 dependent, but are not in the scope of the declarator. */
14392 decl_specifiers->type
14393 = maybe_update_decl_type (decl_specifiers->type, scope);
14395 /* If we're allowing GNU extensions, look for an asm-specification
14397 if (cp_parser_allow_gnu_extensions_p (parser))
14399 /* Look for an asm-specification. */
14400 asm_spec_start_token = cp_lexer_peek_token (parser->lexer);
14401 asm_specification = cp_parser_asm_specification_opt (parser);
14402 /* And attributes. */
14403 attributes_start_token = cp_lexer_peek_token (parser->lexer);
14404 attributes = cp_parser_attributes_opt (parser);
14408 asm_specification = NULL_TREE;
14409 attributes = NULL_TREE;
14412 /* Peek at the next token. */
14413 token = cp_lexer_peek_token (parser->lexer);
14414 /* Check to see if the token indicates the start of a
14415 function-definition. */
14416 if (function_declarator_p (declarator)
14417 && cp_parser_token_starts_function_definition_p (token))
14419 if (!function_definition_allowed_p)
14421 /* If a function-definition should not appear here, issue an
14423 cp_parser_error (parser,
14424 "a function-definition is not allowed here");
14425 return error_mark_node;
14429 location_t func_brace_location
14430 = cp_lexer_peek_token (parser->lexer)->location;
14432 /* Neither attributes nor an asm-specification are allowed
14433 on a function-definition. */
14434 if (asm_specification)
14435 error_at (asm_spec_start_token->location,
14436 "an asm-specification is not allowed "
14437 "on a function-definition");
14439 error_at (attributes_start_token->location,
14440 "attributes are not allowed on a function-definition");
14441 /* This is a function-definition. */
14442 *function_definition_p = true;
14444 /* Parse the function definition. */
14446 decl = cp_parser_save_member_function_body (parser,
14449 prefix_attributes);
14452 = (cp_parser_function_definition_from_specifiers_and_declarator
14453 (parser, decl_specifiers, prefix_attributes, declarator));
14455 if (decl != error_mark_node && DECL_STRUCT_FUNCTION (decl))
14457 /* This is where the prologue starts... */
14458 DECL_STRUCT_FUNCTION (decl)->function_start_locus
14459 = func_brace_location;
14468 Only in function declarations for constructors, destructors, and
14469 type conversions can the decl-specifier-seq be omitted.
14471 We explicitly postpone this check past the point where we handle
14472 function-definitions because we tolerate function-definitions
14473 that are missing their return types in some modes. */
14474 if (!decl_specifiers->any_specifiers_p && ctor_dtor_or_conv_p <= 0)
14476 cp_parser_error (parser,
14477 "expected constructor, destructor, or type conversion");
14478 return error_mark_node;
14481 /* An `=' or an `(', or an '{' in C++0x, indicates an initializer. */
14482 if (token->type == CPP_EQ
14483 || token->type == CPP_OPEN_PAREN
14484 || token->type == CPP_OPEN_BRACE)
14486 is_initialized = SD_INITIALIZED;
14487 initialization_kind = token->type;
14488 if (maybe_range_for_decl)
14489 *maybe_range_for_decl = error_mark_node;
14491 if (token->type == CPP_EQ
14492 && function_declarator_p (declarator))
14494 cp_token *t2 = cp_lexer_peek_nth_token (parser->lexer, 2);
14495 if (t2->keyword == RID_DEFAULT)
14496 is_initialized = SD_DEFAULTED;
14497 else if (t2->keyword == RID_DELETE)
14498 is_initialized = SD_DELETED;
14503 /* If the init-declarator isn't initialized and isn't followed by a
14504 `,' or `;', it's not a valid init-declarator. */
14505 if (token->type != CPP_COMMA
14506 && token->type != CPP_SEMICOLON)
14508 if (maybe_range_for_decl && *maybe_range_for_decl != error_mark_node)
14509 range_for_decl_p = true;
14512 cp_parser_error (parser, "expected initializer");
14513 return error_mark_node;
14516 is_initialized = SD_UNINITIALIZED;
14517 initialization_kind = CPP_EOF;
14520 /* Because start_decl has side-effects, we should only call it if we
14521 know we're going ahead. By this point, we know that we cannot
14522 possibly be looking at any other construct. */
14523 cp_parser_commit_to_tentative_parse (parser);
14525 /* If the decl specifiers were bad, issue an error now that we're
14526 sure this was intended to be a declarator. Then continue
14527 declaring the variable(s), as int, to try to cut down on further
14529 if (decl_specifiers->any_specifiers_p
14530 && decl_specifiers->type == error_mark_node)
14532 cp_parser_error (parser, "invalid type in declaration");
14533 decl_specifiers->type = integer_type_node;
14536 /* Check to see whether or not this declaration is a friend. */
14537 friend_p = cp_parser_friend_p (decl_specifiers);
14539 /* Enter the newly declared entry in the symbol table. If we're
14540 processing a declaration in a class-specifier, we wait until
14541 after processing the initializer. */
14544 if (parser->in_unbraced_linkage_specification_p)
14545 decl_specifiers->storage_class = sc_extern;
14546 decl = start_decl (declarator, decl_specifiers,
14547 range_for_decl_p? SD_INITIALIZED : is_initialized,
14548 attributes, prefix_attributes,
14550 /* Adjust location of decl if declarator->id_loc is more appropriate:
14551 set, and decl wasn't merged with another decl, in which case its
14552 location would be different from input_location, and more accurate. */
14554 && declarator->id_loc != UNKNOWN_LOCATION
14555 && DECL_SOURCE_LOCATION (decl) == input_location)
14556 DECL_SOURCE_LOCATION (decl) = declarator->id_loc;
14559 /* Enter the SCOPE. That way unqualified names appearing in the
14560 initializer will be looked up in SCOPE. */
14561 pushed_scope = push_scope (scope);
14563 /* Perform deferred access control checks, now that we know in which
14564 SCOPE the declared entity resides. */
14565 if (!member_p && decl)
14567 tree saved_current_function_decl = NULL_TREE;
14569 /* If the entity being declared is a function, pretend that we
14570 are in its scope. If it is a `friend', it may have access to
14571 things that would not otherwise be accessible. */
14572 if (TREE_CODE (decl) == FUNCTION_DECL)
14574 saved_current_function_decl = current_function_decl;
14575 current_function_decl = decl;
14578 /* Perform access checks for template parameters. */
14579 cp_parser_perform_template_parameter_access_checks (checks);
14581 /* Perform the access control checks for the declarator and the
14582 decl-specifiers. */
14583 perform_deferred_access_checks ();
14585 /* Restore the saved value. */
14586 if (TREE_CODE (decl) == FUNCTION_DECL)
14587 current_function_decl = saved_current_function_decl;
14590 /* Parse the initializer. */
14591 initializer = NULL_TREE;
14592 is_direct_init = false;
14593 is_non_constant_init = true;
14594 if (is_initialized)
14596 if (function_declarator_p (declarator))
14598 cp_token *initializer_start_token = cp_lexer_peek_token (parser->lexer);
14599 if (initialization_kind == CPP_EQ)
14600 initializer = cp_parser_pure_specifier (parser);
14603 /* If the declaration was erroneous, we don't really
14604 know what the user intended, so just silently
14605 consume the initializer. */
14606 if (decl != error_mark_node)
14607 error_at (initializer_start_token->location,
14608 "initializer provided for function");
14609 cp_parser_skip_to_closing_parenthesis (parser,
14610 /*recovering=*/true,
14611 /*or_comma=*/false,
14612 /*consume_paren=*/true);
14617 /* We want to record the extra mangling scope for in-class
14618 initializers of class members and initializers of static data
14619 member templates. The former is a C++0x feature which isn't
14620 implemented yet, and I expect it will involve deferring
14621 parsing of the initializer until end of class as with default
14622 arguments. So right here we only handle the latter. */
14623 if (!member_p && processing_template_decl)
14624 start_lambda_scope (decl);
14625 initializer = cp_parser_initializer (parser,
14627 &is_non_constant_init);
14628 if (!member_p && processing_template_decl)
14629 finish_lambda_scope ();
14633 /* The old parser allows attributes to appear after a parenthesized
14634 initializer. Mark Mitchell proposed removing this functionality
14635 on the GCC mailing lists on 2002-08-13. This parser accepts the
14636 attributes -- but ignores them. */
14637 if (cp_parser_allow_gnu_extensions_p (parser)
14638 && initialization_kind == CPP_OPEN_PAREN)
14639 if (cp_parser_attributes_opt (parser))
14640 warning (OPT_Wattributes,
14641 "attributes after parenthesized initializer ignored");
14643 /* For an in-class declaration, use `grokfield' to create the
14649 pop_scope (pushed_scope);
14650 pushed_scope = NULL_TREE;
14652 decl = grokfield (declarator, decl_specifiers,
14653 initializer, !is_non_constant_init,
14654 /*asmspec=*/NULL_TREE,
14655 prefix_attributes);
14656 if (decl && TREE_CODE (decl) == FUNCTION_DECL)
14657 cp_parser_save_default_args (parser, decl);
14660 /* Finish processing the declaration. But, skip member
14662 if (!member_p && decl && decl != error_mark_node && !range_for_decl_p)
14664 cp_finish_decl (decl,
14665 initializer, !is_non_constant_init,
14667 /* If the initializer is in parentheses, then this is
14668 a direct-initialization, which means that an
14669 `explicit' constructor is OK. Otherwise, an
14670 `explicit' constructor cannot be used. */
14671 ((is_direct_init || !is_initialized)
14672 ? LOOKUP_NORMAL : LOOKUP_IMPLICIT));
14674 else if ((cxx_dialect != cxx98) && friend_p
14675 && decl && TREE_CODE (decl) == FUNCTION_DECL)
14676 /* Core issue #226 (C++0x only): A default template-argument
14677 shall not be specified in a friend class template
14679 check_default_tmpl_args (decl, current_template_parms, /*is_primary=*/1,
14680 /*is_partial=*/0, /*is_friend_decl=*/1);
14682 if (!friend_p && pushed_scope)
14683 pop_scope (pushed_scope);
14688 /* Parse a declarator.
14692 ptr-operator declarator
14694 abstract-declarator:
14695 ptr-operator abstract-declarator [opt]
14696 direct-abstract-declarator
14701 attributes [opt] direct-declarator
14702 attributes [opt] ptr-operator declarator
14704 abstract-declarator:
14705 attributes [opt] ptr-operator abstract-declarator [opt]
14706 attributes [opt] direct-abstract-declarator
14708 If CTOR_DTOR_OR_CONV_P is not NULL, *CTOR_DTOR_OR_CONV_P is used to
14709 detect constructor, destructor or conversion operators. It is set
14710 to -1 if the declarator is a name, and +1 if it is a
14711 function. Otherwise it is set to zero. Usually you just want to
14712 test for >0, but internally the negative value is used.
14714 (The reason for CTOR_DTOR_OR_CONV_P is that a declaration must have
14715 a decl-specifier-seq unless it declares a constructor, destructor,
14716 or conversion. It might seem that we could check this condition in
14717 semantic analysis, rather than parsing, but that makes it difficult
14718 to handle something like `f()'. We want to notice that there are
14719 no decl-specifiers, and therefore realize that this is an
14720 expression, not a declaration.)
14722 If PARENTHESIZED_P is non-NULL, *PARENTHESIZED_P is set to true iff
14723 the declarator is a direct-declarator of the form "(...)".
14725 MEMBER_P is true iff this declarator is a member-declarator. */
14727 static cp_declarator *
14728 cp_parser_declarator (cp_parser* parser,
14729 cp_parser_declarator_kind dcl_kind,
14730 int* ctor_dtor_or_conv_p,
14731 bool* parenthesized_p,
14734 cp_declarator *declarator;
14735 enum tree_code code;
14736 cp_cv_quals cv_quals;
14738 tree attributes = NULL_TREE;
14740 /* Assume this is not a constructor, destructor, or type-conversion
14742 if (ctor_dtor_or_conv_p)
14743 *ctor_dtor_or_conv_p = 0;
14745 if (cp_parser_allow_gnu_extensions_p (parser))
14746 attributes = cp_parser_attributes_opt (parser);
14748 /* Check for the ptr-operator production. */
14749 cp_parser_parse_tentatively (parser);
14750 /* Parse the ptr-operator. */
14751 code = cp_parser_ptr_operator (parser,
14754 /* If that worked, then we have a ptr-operator. */
14755 if (cp_parser_parse_definitely (parser))
14757 /* If a ptr-operator was found, then this declarator was not
14759 if (parenthesized_p)
14760 *parenthesized_p = true;
14761 /* The dependent declarator is optional if we are parsing an
14762 abstract-declarator. */
14763 if (dcl_kind != CP_PARSER_DECLARATOR_NAMED)
14764 cp_parser_parse_tentatively (parser);
14766 /* Parse the dependent declarator. */
14767 declarator = cp_parser_declarator (parser, dcl_kind,
14768 /*ctor_dtor_or_conv_p=*/NULL,
14769 /*parenthesized_p=*/NULL,
14770 /*member_p=*/false);
14772 /* If we are parsing an abstract-declarator, we must handle the
14773 case where the dependent declarator is absent. */
14774 if (dcl_kind != CP_PARSER_DECLARATOR_NAMED
14775 && !cp_parser_parse_definitely (parser))
14778 declarator = cp_parser_make_indirect_declarator
14779 (code, class_type, cv_quals, declarator);
14781 /* Everything else is a direct-declarator. */
14784 if (parenthesized_p)
14785 *parenthesized_p = cp_lexer_next_token_is (parser->lexer,
14787 declarator = cp_parser_direct_declarator (parser, dcl_kind,
14788 ctor_dtor_or_conv_p,
14792 if (attributes && declarator && declarator != cp_error_declarator)
14793 declarator->attributes = attributes;
14798 /* Parse a direct-declarator or direct-abstract-declarator.
14802 direct-declarator ( parameter-declaration-clause )
14803 cv-qualifier-seq [opt]
14804 exception-specification [opt]
14805 direct-declarator [ constant-expression [opt] ]
14808 direct-abstract-declarator:
14809 direct-abstract-declarator [opt]
14810 ( parameter-declaration-clause )
14811 cv-qualifier-seq [opt]
14812 exception-specification [opt]
14813 direct-abstract-declarator [opt] [ constant-expression [opt] ]
14814 ( abstract-declarator )
14816 Returns a representation of the declarator. DCL_KIND is
14817 CP_PARSER_DECLARATOR_ABSTRACT, if we are parsing a
14818 direct-abstract-declarator. It is CP_PARSER_DECLARATOR_NAMED, if
14819 we are parsing a direct-declarator. It is
14820 CP_PARSER_DECLARATOR_EITHER, if we can accept either - in the case
14821 of ambiguity we prefer an abstract declarator, as per
14822 [dcl.ambig.res]. CTOR_DTOR_OR_CONV_P and MEMBER_P are as for
14823 cp_parser_declarator. */
14825 static cp_declarator *
14826 cp_parser_direct_declarator (cp_parser* parser,
14827 cp_parser_declarator_kind dcl_kind,
14828 int* ctor_dtor_or_conv_p,
14832 cp_declarator *declarator = NULL;
14833 tree scope = NULL_TREE;
14834 bool saved_default_arg_ok_p = parser->default_arg_ok_p;
14835 bool saved_in_declarator_p = parser->in_declarator_p;
14837 tree pushed_scope = NULL_TREE;
14841 /* Peek at the next token. */
14842 token = cp_lexer_peek_token (parser->lexer);
14843 if (token->type == CPP_OPEN_PAREN)
14845 /* This is either a parameter-declaration-clause, or a
14846 parenthesized declarator. When we know we are parsing a
14847 named declarator, it must be a parenthesized declarator
14848 if FIRST is true. For instance, `(int)' is a
14849 parameter-declaration-clause, with an omitted
14850 direct-abstract-declarator. But `((*))', is a
14851 parenthesized abstract declarator. Finally, when T is a
14852 template parameter `(T)' is a
14853 parameter-declaration-clause, and not a parenthesized
14856 We first try and parse a parameter-declaration-clause,
14857 and then try a nested declarator (if FIRST is true).
14859 It is not an error for it not to be a
14860 parameter-declaration-clause, even when FIRST is
14866 The first is the declaration of a function while the
14867 second is the definition of a variable, including its
14870 Having seen only the parenthesis, we cannot know which of
14871 these two alternatives should be selected. Even more
14872 complex are examples like:
14877 The former is a function-declaration; the latter is a
14878 variable initialization.
14880 Thus again, we try a parameter-declaration-clause, and if
14881 that fails, we back out and return. */
14883 if (!first || dcl_kind != CP_PARSER_DECLARATOR_NAMED)
14886 unsigned saved_num_template_parameter_lists;
14887 bool is_declarator = false;
14890 /* In a member-declarator, the only valid interpretation
14891 of a parenthesis is the start of a
14892 parameter-declaration-clause. (It is invalid to
14893 initialize a static data member with a parenthesized
14894 initializer; only the "=" form of initialization is
14897 cp_parser_parse_tentatively (parser);
14899 /* Consume the `('. */
14900 cp_lexer_consume_token (parser->lexer);
14903 /* If this is going to be an abstract declarator, we're
14904 in a declarator and we can't have default args. */
14905 parser->default_arg_ok_p = false;
14906 parser->in_declarator_p = true;
14909 /* Inside the function parameter list, surrounding
14910 template-parameter-lists do not apply. */
14911 saved_num_template_parameter_lists
14912 = parser->num_template_parameter_lists;
14913 parser->num_template_parameter_lists = 0;
14915 begin_scope (sk_function_parms, NULL_TREE);
14917 /* Parse the parameter-declaration-clause. */
14918 params = cp_parser_parameter_declaration_clause (parser);
14920 parser->num_template_parameter_lists
14921 = saved_num_template_parameter_lists;
14923 /* Consume the `)'. */
14924 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
14926 /* If all went well, parse the cv-qualifier-seq and the
14927 exception-specification. */
14928 if (member_p || cp_parser_parse_definitely (parser))
14930 cp_cv_quals cv_quals;
14931 cp_virt_specifiers virt_specifiers;
14932 tree exception_specification;
14935 is_declarator = true;
14937 if (ctor_dtor_or_conv_p)
14938 *ctor_dtor_or_conv_p = *ctor_dtor_or_conv_p < 0;
14941 /* Parse the cv-qualifier-seq. */
14942 cv_quals = cp_parser_cv_qualifier_seq_opt (parser);
14943 /* And the exception-specification. */
14944 exception_specification
14945 = cp_parser_exception_specification_opt (parser);
14946 /* Parse the virt-specifier-seq. */
14947 virt_specifiers = cp_parser_virt_specifier_seq_opt (parser);
14950 = cp_parser_late_return_type_opt (parser);
14952 /* Create the function-declarator. */
14953 declarator = make_call_declarator (declarator,
14957 exception_specification,
14959 /* Any subsequent parameter lists are to do with
14960 return type, so are not those of the declared
14962 parser->default_arg_ok_p = false;
14965 /* Remove the function parms from scope. */
14966 for (t = current_binding_level->names; t; t = DECL_CHAIN (t))
14967 pop_binding (DECL_NAME (t), t);
14971 /* Repeat the main loop. */
14975 /* If this is the first, we can try a parenthesized
14979 bool saved_in_type_id_in_expr_p;
14981 parser->default_arg_ok_p = saved_default_arg_ok_p;
14982 parser->in_declarator_p = saved_in_declarator_p;
14984 /* Consume the `('. */
14985 cp_lexer_consume_token (parser->lexer);
14986 /* Parse the nested declarator. */
14987 saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
14988 parser->in_type_id_in_expr_p = true;
14990 = cp_parser_declarator (parser, dcl_kind, ctor_dtor_or_conv_p,
14991 /*parenthesized_p=*/NULL,
14993 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
14995 /* Expect a `)'. */
14996 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
14997 declarator = cp_error_declarator;
14998 if (declarator == cp_error_declarator)
15001 goto handle_declarator;
15003 /* Otherwise, we must be done. */
15007 else if ((!first || dcl_kind != CP_PARSER_DECLARATOR_NAMED)
15008 && token->type == CPP_OPEN_SQUARE)
15010 /* Parse an array-declarator. */
15013 if (ctor_dtor_or_conv_p)
15014 *ctor_dtor_or_conv_p = 0;
15017 parser->default_arg_ok_p = false;
15018 parser->in_declarator_p = true;
15019 /* Consume the `['. */
15020 cp_lexer_consume_token (parser->lexer);
15021 /* Peek at the next token. */
15022 token = cp_lexer_peek_token (parser->lexer);
15023 /* If the next token is `]', then there is no
15024 constant-expression. */
15025 if (token->type != CPP_CLOSE_SQUARE)
15027 bool non_constant_p;
15030 = cp_parser_constant_expression (parser,
15031 /*allow_non_constant=*/true,
15033 if (!non_constant_p)
15035 /* Normally, the array bound must be an integral constant
15036 expression. However, as an extension, we allow VLAs
15037 in function scopes as long as they aren't part of a
15038 parameter declaration. */
15039 else if (!parser->in_function_body
15040 || current_binding_level->kind == sk_function_parms)
15042 cp_parser_error (parser,
15043 "array bound is not an integer constant");
15044 bounds = error_mark_node;
15046 else if (processing_template_decl && !error_operand_p (bounds))
15048 /* Remember this wasn't a constant-expression. */
15049 bounds = build_nop (TREE_TYPE (bounds), bounds);
15050 TREE_SIDE_EFFECTS (bounds) = 1;
15054 bounds = NULL_TREE;
15055 /* Look for the closing `]'. */
15056 if (!cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE))
15058 declarator = cp_error_declarator;
15062 declarator = make_array_declarator (declarator, bounds);
15064 else if (first && dcl_kind != CP_PARSER_DECLARATOR_ABSTRACT)
15067 tree qualifying_scope;
15068 tree unqualified_name;
15069 special_function_kind sfk;
15071 bool pack_expansion_p = false;
15072 cp_token *declarator_id_start_token;
15074 /* Parse a declarator-id */
15075 abstract_ok = (dcl_kind == CP_PARSER_DECLARATOR_EITHER);
15078 cp_parser_parse_tentatively (parser);
15080 /* If we see an ellipsis, we should be looking at a
15082 if (token->type == CPP_ELLIPSIS)
15084 /* Consume the `...' */
15085 cp_lexer_consume_token (parser->lexer);
15087 pack_expansion_p = true;
15091 declarator_id_start_token = cp_lexer_peek_token (parser->lexer);
15093 = cp_parser_declarator_id (parser, /*optional_p=*/abstract_ok);
15094 qualifying_scope = parser->scope;
15099 if (!unqualified_name && pack_expansion_p)
15101 /* Check whether an error occurred. */
15102 okay = !cp_parser_error_occurred (parser);
15104 /* We already consumed the ellipsis to mark a
15105 parameter pack, but we have no way to report it,
15106 so abort the tentative parse. We will be exiting
15107 immediately anyway. */
15108 cp_parser_abort_tentative_parse (parser);
15111 okay = cp_parser_parse_definitely (parser);
15114 unqualified_name = error_mark_node;
15115 else if (unqualified_name
15116 && (qualifying_scope
15117 || (TREE_CODE (unqualified_name)
15118 != IDENTIFIER_NODE)))
15120 cp_parser_error (parser, "expected unqualified-id");
15121 unqualified_name = error_mark_node;
15125 if (!unqualified_name)
15127 if (unqualified_name == error_mark_node)
15129 declarator = cp_error_declarator;
15130 pack_expansion_p = false;
15131 declarator->parameter_pack_p = false;
15135 if (qualifying_scope && at_namespace_scope_p ()
15136 && TREE_CODE (qualifying_scope) == TYPENAME_TYPE)
15138 /* In the declaration of a member of a template class
15139 outside of the class itself, the SCOPE will sometimes
15140 be a TYPENAME_TYPE. For example, given:
15142 template <typename T>
15143 int S<T>::R::i = 3;
15145 the SCOPE will be a TYPENAME_TYPE for `S<T>::R'. In
15146 this context, we must resolve S<T>::R to an ordinary
15147 type, rather than a typename type.
15149 The reason we normally avoid resolving TYPENAME_TYPEs
15150 is that a specialization of `S' might render
15151 `S<T>::R' not a type. However, if `S' is
15152 specialized, then this `i' will not be used, so there
15153 is no harm in resolving the types here. */
15156 /* Resolve the TYPENAME_TYPE. */
15157 type = resolve_typename_type (qualifying_scope,
15158 /*only_current_p=*/false);
15159 /* If that failed, the declarator is invalid. */
15160 if (TREE_CODE (type) == TYPENAME_TYPE)
15162 if (typedef_variant_p (type))
15163 error_at (declarator_id_start_token->location,
15164 "cannot define member of dependent typedef "
15167 error_at (declarator_id_start_token->location,
15168 "%<%T::%E%> is not a type",
15169 TYPE_CONTEXT (qualifying_scope),
15170 TYPE_IDENTIFIER (qualifying_scope));
15172 qualifying_scope = type;
15177 if (unqualified_name)
15181 if (qualifying_scope
15182 && CLASS_TYPE_P (qualifying_scope))
15183 class_type = qualifying_scope;
15185 class_type = current_class_type;
15187 if (TREE_CODE (unqualified_name) == TYPE_DECL)
15189 tree name_type = TREE_TYPE (unqualified_name);
15190 if (class_type && same_type_p (name_type, class_type))
15192 if (qualifying_scope
15193 && CLASSTYPE_USE_TEMPLATE (name_type))
15195 error_at (declarator_id_start_token->location,
15196 "invalid use of constructor as a template");
15197 inform (declarator_id_start_token->location,
15198 "use %<%T::%D%> instead of %<%T::%D%> to "
15199 "name the constructor in a qualified name",
15201 DECL_NAME (TYPE_TI_TEMPLATE (class_type)),
15202 class_type, name_type);
15203 declarator = cp_error_declarator;
15207 unqualified_name = constructor_name (class_type);
15211 /* We do not attempt to print the declarator
15212 here because we do not have enough
15213 information about its original syntactic
15215 cp_parser_error (parser, "invalid declarator");
15216 declarator = cp_error_declarator;
15223 if (TREE_CODE (unqualified_name) == BIT_NOT_EXPR)
15224 sfk = sfk_destructor;
15225 else if (IDENTIFIER_TYPENAME_P (unqualified_name))
15226 sfk = sfk_conversion;
15227 else if (/* There's no way to declare a constructor
15228 for an anonymous type, even if the type
15229 got a name for linkage purposes. */
15230 !TYPE_WAS_ANONYMOUS (class_type)
15231 && constructor_name_p (unqualified_name,
15234 unqualified_name = constructor_name (class_type);
15235 sfk = sfk_constructor;
15237 else if (is_overloaded_fn (unqualified_name)
15238 && DECL_CONSTRUCTOR_P (get_first_fn
15239 (unqualified_name)))
15240 sfk = sfk_constructor;
15242 if (ctor_dtor_or_conv_p && sfk != sfk_none)
15243 *ctor_dtor_or_conv_p = -1;
15246 declarator = make_id_declarator (qualifying_scope,
15249 declarator->id_loc = token->location;
15250 declarator->parameter_pack_p = pack_expansion_p;
15252 if (pack_expansion_p)
15253 maybe_warn_variadic_templates ();
15256 handle_declarator:;
15257 scope = get_scope_of_declarator (declarator);
15259 /* Any names that appear after the declarator-id for a
15260 member are looked up in the containing scope. */
15261 pushed_scope = push_scope (scope);
15262 parser->in_declarator_p = true;
15263 if ((ctor_dtor_or_conv_p && *ctor_dtor_or_conv_p)
15264 || (declarator && declarator->kind == cdk_id))
15265 /* Default args are only allowed on function
15267 parser->default_arg_ok_p = saved_default_arg_ok_p;
15269 parser->default_arg_ok_p = false;
15278 /* For an abstract declarator, we might wind up with nothing at this
15279 point. That's an error; the declarator is not optional. */
15281 cp_parser_error (parser, "expected declarator");
15283 /* If we entered a scope, we must exit it now. */
15285 pop_scope (pushed_scope);
15287 parser->default_arg_ok_p = saved_default_arg_ok_p;
15288 parser->in_declarator_p = saved_in_declarator_p;
15293 /* Parse a ptr-operator.
15296 * cv-qualifier-seq [opt]
15298 :: [opt] nested-name-specifier * cv-qualifier-seq [opt]
15303 & cv-qualifier-seq [opt]
15305 Returns INDIRECT_REF if a pointer, or pointer-to-member, was used.
15306 Returns ADDR_EXPR if a reference was used, or NON_LVALUE_EXPR for
15307 an rvalue reference. In the case of a pointer-to-member, *TYPE is
15308 filled in with the TYPE containing the member. *CV_QUALS is
15309 filled in with the cv-qualifier-seq, or TYPE_UNQUALIFIED, if there
15310 are no cv-qualifiers. Returns ERROR_MARK if an error occurred.
15311 Note that the tree codes returned by this function have nothing
15312 to do with the types of trees that will be eventually be created
15313 to represent the pointer or reference type being parsed. They are
15314 just constants with suggestive names. */
15315 static enum tree_code
15316 cp_parser_ptr_operator (cp_parser* parser,
15318 cp_cv_quals *cv_quals)
15320 enum tree_code code = ERROR_MARK;
15323 /* Assume that it's not a pointer-to-member. */
15325 /* And that there are no cv-qualifiers. */
15326 *cv_quals = TYPE_UNQUALIFIED;
15328 /* Peek at the next token. */
15329 token = cp_lexer_peek_token (parser->lexer);
15331 /* If it's a `*', `&' or `&&' we have a pointer or reference. */
15332 if (token->type == CPP_MULT)
15333 code = INDIRECT_REF;
15334 else if (token->type == CPP_AND)
15336 else if ((cxx_dialect != cxx98) &&
15337 token->type == CPP_AND_AND) /* C++0x only */
15338 code = NON_LVALUE_EXPR;
15340 if (code != ERROR_MARK)
15342 /* Consume the `*', `&' or `&&'. */
15343 cp_lexer_consume_token (parser->lexer);
15345 /* A `*' can be followed by a cv-qualifier-seq, and so can a
15346 `&', if we are allowing GNU extensions. (The only qualifier
15347 that can legally appear after `&' is `restrict', but that is
15348 enforced during semantic analysis. */
15349 if (code == INDIRECT_REF
15350 || cp_parser_allow_gnu_extensions_p (parser))
15351 *cv_quals = cp_parser_cv_qualifier_seq_opt (parser);
15355 /* Try the pointer-to-member case. */
15356 cp_parser_parse_tentatively (parser);
15357 /* Look for the optional `::' operator. */
15358 cp_parser_global_scope_opt (parser,
15359 /*current_scope_valid_p=*/false);
15360 /* Look for the nested-name specifier. */
15361 token = cp_lexer_peek_token (parser->lexer);
15362 cp_parser_nested_name_specifier (parser,
15363 /*typename_keyword_p=*/false,
15364 /*check_dependency_p=*/true,
15366 /*is_declaration=*/false);
15367 /* If we found it, and the next token is a `*', then we are
15368 indeed looking at a pointer-to-member operator. */
15369 if (!cp_parser_error_occurred (parser)
15370 && cp_parser_require (parser, CPP_MULT, RT_MULT))
15372 /* Indicate that the `*' operator was used. */
15373 code = INDIRECT_REF;
15375 if (TREE_CODE (parser->scope) == NAMESPACE_DECL)
15376 error_at (token->location, "%qD is a namespace", parser->scope);
15379 /* The type of which the member is a member is given by the
15381 *type = parser->scope;
15382 /* The next name will not be qualified. */
15383 parser->scope = NULL_TREE;
15384 parser->qualifying_scope = NULL_TREE;
15385 parser->object_scope = NULL_TREE;
15386 /* Look for the optional cv-qualifier-seq. */
15387 *cv_quals = cp_parser_cv_qualifier_seq_opt (parser);
15390 /* If that didn't work we don't have a ptr-operator. */
15391 if (!cp_parser_parse_definitely (parser))
15392 cp_parser_error (parser, "expected ptr-operator");
15398 /* Parse an (optional) cv-qualifier-seq.
15401 cv-qualifier cv-qualifier-seq [opt]
15412 Returns a bitmask representing the cv-qualifiers. */
15415 cp_parser_cv_qualifier_seq_opt (cp_parser* parser)
15417 cp_cv_quals cv_quals = TYPE_UNQUALIFIED;
15422 cp_cv_quals cv_qualifier;
15424 /* Peek at the next token. */
15425 token = cp_lexer_peek_token (parser->lexer);
15426 /* See if it's a cv-qualifier. */
15427 switch (token->keyword)
15430 cv_qualifier = TYPE_QUAL_CONST;
15434 cv_qualifier = TYPE_QUAL_VOLATILE;
15438 cv_qualifier = TYPE_QUAL_RESTRICT;
15442 cv_qualifier = TYPE_UNQUALIFIED;
15449 if (cv_quals & cv_qualifier)
15451 error_at (token->location, "duplicate cv-qualifier");
15452 cp_lexer_purge_token (parser->lexer);
15456 cp_lexer_consume_token (parser->lexer);
15457 cv_quals |= cv_qualifier;
15464 /* Parse an (optional) virt-specifier-seq.
15466 virt-specifier-seq:
15467 virt-specifier virt-specifier-seq [opt]
15473 Returns a bitmask representing the virt-specifiers. */
15475 static cp_virt_specifiers
15476 cp_parser_virt_specifier_seq_opt (cp_parser* parser)
15478 cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
15483 cp_virt_specifiers virt_specifier;
15485 /* Peek at the next token. */
15486 token = cp_lexer_peek_token (parser->lexer);
15487 /* See if it's a virt-specifier-qualifier. */
15488 if (token->type != CPP_NAME)
15490 if (!strcmp (IDENTIFIER_POINTER(token->u.value), "override"))
15491 virt_specifier = VIRT_SPEC_OVERRIDE;
15492 else if (!strcmp (IDENTIFIER_POINTER(token->u.value), "final"))
15493 virt_specifier = VIRT_SPEC_FINAL;
15497 if (virt_specifiers & virt_specifier)
15499 error_at (token->location, "duplicate virt-specifier");
15500 cp_lexer_purge_token (parser->lexer);
15504 cp_lexer_consume_token (parser->lexer);
15505 virt_specifiers |= virt_specifier;
15508 return virt_specifiers;
15511 /* Parse a late-specified return type, if any. This is not a separate
15512 non-terminal, but part of a function declarator, which looks like
15514 -> trailing-type-specifier-seq abstract-declarator(opt)
15516 Returns the type indicated by the type-id. */
15519 cp_parser_late_return_type_opt (cp_parser* parser)
15523 /* Peek at the next token. */
15524 token = cp_lexer_peek_token (parser->lexer);
15525 /* A late-specified return type is indicated by an initial '->'. */
15526 if (token->type != CPP_DEREF)
15529 /* Consume the ->. */
15530 cp_lexer_consume_token (parser->lexer);
15532 return cp_parser_trailing_type_id (parser);
15535 /* Parse a declarator-id.
15539 :: [opt] nested-name-specifier [opt] type-name
15541 In the `id-expression' case, the value returned is as for
15542 cp_parser_id_expression if the id-expression was an unqualified-id.
15543 If the id-expression was a qualified-id, then a SCOPE_REF is
15544 returned. The first operand is the scope (either a NAMESPACE_DECL
15545 or TREE_TYPE), but the second is still just a representation of an
15549 cp_parser_declarator_id (cp_parser* parser, bool optional_p)
15552 /* The expression must be an id-expression. Assume that qualified
15553 names are the names of types so that:
15556 int S<T>::R::i = 3;
15558 will work; we must treat `S<T>::R' as the name of a type.
15559 Similarly, assume that qualified names are templates, where
15563 int S<T>::R<T>::i = 3;
15566 id = cp_parser_id_expression (parser,
15567 /*template_keyword_p=*/false,
15568 /*check_dependency_p=*/false,
15569 /*template_p=*/NULL,
15570 /*declarator_p=*/true,
15572 if (id && BASELINK_P (id))
15573 id = BASELINK_FUNCTIONS (id);
15577 /* Parse a type-id.
15580 type-specifier-seq abstract-declarator [opt]
15582 Returns the TYPE specified. */
15585 cp_parser_type_id_1 (cp_parser* parser, bool is_template_arg,
15586 bool is_trailing_return)
15588 cp_decl_specifier_seq type_specifier_seq;
15589 cp_declarator *abstract_declarator;
15591 /* Parse the type-specifier-seq. */
15592 cp_parser_type_specifier_seq (parser, /*is_declaration=*/false,
15593 is_trailing_return,
15594 &type_specifier_seq);
15595 if (type_specifier_seq.type == error_mark_node)
15596 return error_mark_node;
15598 /* There might or might not be an abstract declarator. */
15599 cp_parser_parse_tentatively (parser);
15600 /* Look for the declarator. */
15601 abstract_declarator
15602 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_ABSTRACT, NULL,
15603 /*parenthesized_p=*/NULL,
15604 /*member_p=*/false);
15605 /* Check to see if there really was a declarator. */
15606 if (!cp_parser_parse_definitely (parser))
15607 abstract_declarator = NULL;
15609 if (type_specifier_seq.type
15610 && type_uses_auto (type_specifier_seq.type))
15612 /* A type-id with type 'auto' is only ok if the abstract declarator
15613 is a function declarator with a late-specified return type. */
15614 if (abstract_declarator
15615 && abstract_declarator->kind == cdk_function
15616 && abstract_declarator->u.function.late_return_type)
15620 error ("invalid use of %<auto%>");
15621 return error_mark_node;
15625 return groktypename (&type_specifier_seq, abstract_declarator,
15629 static tree cp_parser_type_id (cp_parser *parser)
15631 return cp_parser_type_id_1 (parser, false, false);
15634 static tree cp_parser_template_type_arg (cp_parser *parser)
15637 const char *saved_message = parser->type_definition_forbidden_message;
15638 parser->type_definition_forbidden_message
15639 = G_("types may not be defined in template arguments");
15640 r = cp_parser_type_id_1 (parser, true, false);
15641 parser->type_definition_forbidden_message = saved_message;
15645 static tree cp_parser_trailing_type_id (cp_parser *parser)
15647 return cp_parser_type_id_1 (parser, false, true);
15650 /* Parse a type-specifier-seq.
15652 type-specifier-seq:
15653 type-specifier type-specifier-seq [opt]
15657 type-specifier-seq:
15658 attributes type-specifier-seq [opt]
15660 If IS_DECLARATION is true, we are at the start of a "condition" or
15661 exception-declaration, so we might be followed by a declarator-id.
15663 If IS_TRAILING_RETURN is true, we are in a trailing-return-type,
15664 i.e. we've just seen "->".
15666 Sets *TYPE_SPECIFIER_SEQ to represent the sequence. */
15669 cp_parser_type_specifier_seq (cp_parser* parser,
15670 bool is_declaration,
15671 bool is_trailing_return,
15672 cp_decl_specifier_seq *type_specifier_seq)
15674 bool seen_type_specifier = false;
15675 cp_parser_flags flags = CP_PARSER_FLAGS_OPTIONAL;
15676 cp_token *start_token = NULL;
15678 /* Clear the TYPE_SPECIFIER_SEQ. */
15679 clear_decl_specs (type_specifier_seq);
15681 /* In the context of a trailing return type, enum E { } is an
15682 elaborated-type-specifier followed by a function-body, not an
15684 if (is_trailing_return)
15685 flags |= CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS;
15687 /* Parse the type-specifiers and attributes. */
15690 tree type_specifier;
15691 bool is_cv_qualifier;
15693 /* Check for attributes first. */
15694 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_ATTRIBUTE))
15696 type_specifier_seq->attributes =
15697 chainon (type_specifier_seq->attributes,
15698 cp_parser_attributes_opt (parser));
15702 /* record the token of the beginning of the type specifier seq,
15703 for error reporting purposes*/
15705 start_token = cp_lexer_peek_token (parser->lexer);
15707 /* Look for the type-specifier. */
15708 type_specifier = cp_parser_type_specifier (parser,
15710 type_specifier_seq,
15711 /*is_declaration=*/false,
15714 if (!type_specifier)
15716 /* If the first type-specifier could not be found, this is not a
15717 type-specifier-seq at all. */
15718 if (!seen_type_specifier)
15720 cp_parser_error (parser, "expected type-specifier");
15721 type_specifier_seq->type = error_mark_node;
15724 /* If subsequent type-specifiers could not be found, the
15725 type-specifier-seq is complete. */
15729 seen_type_specifier = true;
15730 /* The standard says that a condition can be:
15732 type-specifier-seq declarator = assignment-expression
15739 we should treat the "S" as a declarator, not as a
15740 type-specifier. The standard doesn't say that explicitly for
15741 type-specifier-seq, but it does say that for
15742 decl-specifier-seq in an ordinary declaration. Perhaps it
15743 would be clearer just to allow a decl-specifier-seq here, and
15744 then add a semantic restriction that if any decl-specifiers
15745 that are not type-specifiers appear, the program is invalid. */
15746 if (is_declaration && !is_cv_qualifier)
15747 flags |= CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES;
15750 cp_parser_check_decl_spec (type_specifier_seq, start_token->location);
15753 /* Parse a parameter-declaration-clause.
15755 parameter-declaration-clause:
15756 parameter-declaration-list [opt] ... [opt]
15757 parameter-declaration-list , ...
15759 Returns a representation for the parameter declarations. A return
15760 value of NULL indicates a parameter-declaration-clause consisting
15761 only of an ellipsis. */
15764 cp_parser_parameter_declaration_clause (cp_parser* parser)
15771 /* Peek at the next token. */
15772 token = cp_lexer_peek_token (parser->lexer);
15773 /* Check for trivial parameter-declaration-clauses. */
15774 if (token->type == CPP_ELLIPSIS)
15776 /* Consume the `...' token. */
15777 cp_lexer_consume_token (parser->lexer);
15780 else if (token->type == CPP_CLOSE_PAREN)
15781 /* There are no parameters. */
15783 #ifndef NO_IMPLICIT_EXTERN_C
15784 if (in_system_header && current_class_type == NULL
15785 && current_lang_name == lang_name_c)
15789 return void_list_node;
15791 /* Check for `(void)', too, which is a special case. */
15792 else if (token->keyword == RID_VOID
15793 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
15794 == CPP_CLOSE_PAREN))
15796 /* Consume the `void' token. */
15797 cp_lexer_consume_token (parser->lexer);
15798 /* There are no parameters. */
15799 return void_list_node;
15802 /* Parse the parameter-declaration-list. */
15803 parameters = cp_parser_parameter_declaration_list (parser, &is_error);
15804 /* If a parse error occurred while parsing the
15805 parameter-declaration-list, then the entire
15806 parameter-declaration-clause is erroneous. */
15810 /* Peek at the next token. */
15811 token = cp_lexer_peek_token (parser->lexer);
15812 /* If it's a `,', the clause should terminate with an ellipsis. */
15813 if (token->type == CPP_COMMA)
15815 /* Consume the `,'. */
15816 cp_lexer_consume_token (parser->lexer);
15817 /* Expect an ellipsis. */
15819 = (cp_parser_require (parser, CPP_ELLIPSIS, RT_ELLIPSIS) != NULL);
15821 /* It might also be `...' if the optional trailing `,' was
15823 else if (token->type == CPP_ELLIPSIS)
15825 /* Consume the `...' token. */
15826 cp_lexer_consume_token (parser->lexer);
15827 /* And remember that we saw it. */
15831 ellipsis_p = false;
15833 /* Finish the parameter list. */
15835 parameters = chainon (parameters, void_list_node);
15840 /* Parse a parameter-declaration-list.
15842 parameter-declaration-list:
15843 parameter-declaration
15844 parameter-declaration-list , parameter-declaration
15846 Returns a representation of the parameter-declaration-list, as for
15847 cp_parser_parameter_declaration_clause. However, the
15848 `void_list_node' is never appended to the list. Upon return,
15849 *IS_ERROR will be true iff an error occurred. */
15852 cp_parser_parameter_declaration_list (cp_parser* parser, bool *is_error)
15854 tree parameters = NULL_TREE;
15855 tree *tail = ¶meters;
15856 bool saved_in_unbraced_linkage_specification_p;
15859 /* Assume all will go well. */
15861 /* The special considerations that apply to a function within an
15862 unbraced linkage specifications do not apply to the parameters
15863 to the function. */
15864 saved_in_unbraced_linkage_specification_p
15865 = parser->in_unbraced_linkage_specification_p;
15866 parser->in_unbraced_linkage_specification_p = false;
15868 /* Look for more parameters. */
15871 cp_parameter_declarator *parameter;
15872 tree decl = error_mark_node;
15873 bool parenthesized_p;
15874 /* Parse the parameter. */
15876 = cp_parser_parameter_declaration (parser,
15877 /*template_parm_p=*/false,
15880 /* We don't know yet if the enclosing context is deprecated, so wait
15881 and warn in grokparms if appropriate. */
15882 deprecated_state = DEPRECATED_SUPPRESS;
15885 decl = grokdeclarator (parameter->declarator,
15886 ¶meter->decl_specifiers,
15888 parameter->default_argument != NULL_TREE,
15889 ¶meter->decl_specifiers.attributes);
15891 deprecated_state = DEPRECATED_NORMAL;
15893 /* If a parse error occurred parsing the parameter declaration,
15894 then the entire parameter-declaration-list is erroneous. */
15895 if (decl == error_mark_node)
15898 parameters = error_mark_node;
15902 if (parameter->decl_specifiers.attributes)
15903 cplus_decl_attributes (&decl,
15904 parameter->decl_specifiers.attributes,
15906 if (DECL_NAME (decl))
15907 decl = pushdecl (decl);
15909 if (decl != error_mark_node)
15911 retrofit_lang_decl (decl);
15912 DECL_PARM_INDEX (decl) = ++index;
15913 DECL_PARM_LEVEL (decl) = function_parm_depth ();
15916 /* Add the new parameter to the list. */
15917 *tail = build_tree_list (parameter->default_argument, decl);
15918 tail = &TREE_CHAIN (*tail);
15920 /* Peek at the next token. */
15921 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_PAREN)
15922 || cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS)
15923 /* These are for Objective-C++ */
15924 || cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)
15925 || cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
15926 /* The parameter-declaration-list is complete. */
15928 else if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
15932 /* Peek at the next token. */
15933 token = cp_lexer_peek_nth_token (parser->lexer, 2);
15934 /* If it's an ellipsis, then the list is complete. */
15935 if (token->type == CPP_ELLIPSIS)
15937 /* Otherwise, there must be more parameters. Consume the
15939 cp_lexer_consume_token (parser->lexer);
15940 /* When parsing something like:
15942 int i(float f, double d)
15944 we can tell after seeing the declaration for "f" that we
15945 are not looking at an initialization of a variable "i",
15946 but rather at the declaration of a function "i".
15948 Due to the fact that the parsing of template arguments
15949 (as specified to a template-id) requires backtracking we
15950 cannot use this technique when inside a template argument
15952 if (!parser->in_template_argument_list_p
15953 && !parser->in_type_id_in_expr_p
15954 && cp_parser_uncommitted_to_tentative_parse_p (parser)
15955 /* However, a parameter-declaration of the form
15956 "foat(f)" (which is a valid declaration of a
15957 parameter "f") can also be interpreted as an
15958 expression (the conversion of "f" to "float"). */
15959 && !parenthesized_p)
15960 cp_parser_commit_to_tentative_parse (parser);
15964 cp_parser_error (parser, "expected %<,%> or %<...%>");
15965 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
15966 cp_parser_skip_to_closing_parenthesis (parser,
15967 /*recovering=*/true,
15968 /*or_comma=*/false,
15969 /*consume_paren=*/false);
15974 parser->in_unbraced_linkage_specification_p
15975 = saved_in_unbraced_linkage_specification_p;
15980 /* Parse a parameter declaration.
15982 parameter-declaration:
15983 decl-specifier-seq ... [opt] declarator
15984 decl-specifier-seq declarator = assignment-expression
15985 decl-specifier-seq ... [opt] abstract-declarator [opt]
15986 decl-specifier-seq abstract-declarator [opt] = assignment-expression
15988 If TEMPLATE_PARM_P is TRUE, then this parameter-declaration
15989 declares a template parameter. (In that case, a non-nested `>'
15990 token encountered during the parsing of the assignment-expression
15991 is not interpreted as a greater-than operator.)
15993 Returns a representation of the parameter, or NULL if an error
15994 occurs. If PARENTHESIZED_P is non-NULL, *PARENTHESIZED_P is set to
15995 true iff the declarator is of the form "(p)". */
15997 static cp_parameter_declarator *
15998 cp_parser_parameter_declaration (cp_parser *parser,
15999 bool template_parm_p,
16000 bool *parenthesized_p)
16002 int declares_class_or_enum;
16003 cp_decl_specifier_seq decl_specifiers;
16004 cp_declarator *declarator;
16005 tree default_argument;
16006 cp_token *token = NULL, *declarator_token_start = NULL;
16007 const char *saved_message;
16009 /* In a template parameter, `>' is not an operator.
16013 When parsing a default template-argument for a non-type
16014 template-parameter, the first non-nested `>' is taken as the end
16015 of the template parameter-list rather than a greater-than
16018 /* Type definitions may not appear in parameter types. */
16019 saved_message = parser->type_definition_forbidden_message;
16020 parser->type_definition_forbidden_message
16021 = G_("types may not be defined in parameter types");
16023 /* Parse the declaration-specifiers. */
16024 cp_parser_decl_specifier_seq (parser,
16025 CP_PARSER_FLAGS_NONE,
16027 &declares_class_or_enum);
16029 /* Complain about missing 'typename' or other invalid type names. */
16030 if (!decl_specifiers.any_type_specifiers_p)
16031 cp_parser_parse_and_diagnose_invalid_type_name (parser);
16033 /* If an error occurred, there's no reason to attempt to parse the
16034 rest of the declaration. */
16035 if (cp_parser_error_occurred (parser))
16037 parser->type_definition_forbidden_message = saved_message;
16041 /* Peek at the next token. */
16042 token = cp_lexer_peek_token (parser->lexer);
16044 /* If the next token is a `)', `,', `=', `>', or `...', then there
16045 is no declarator. However, when variadic templates are enabled,
16046 there may be a declarator following `...'. */
16047 if (token->type == CPP_CLOSE_PAREN
16048 || token->type == CPP_COMMA
16049 || token->type == CPP_EQ
16050 || token->type == CPP_GREATER)
16053 if (parenthesized_p)
16054 *parenthesized_p = false;
16056 /* Otherwise, there should be a declarator. */
16059 bool saved_default_arg_ok_p = parser->default_arg_ok_p;
16060 parser->default_arg_ok_p = false;
16062 /* After seeing a decl-specifier-seq, if the next token is not a
16063 "(", there is no possibility that the code is a valid
16064 expression. Therefore, if parsing tentatively, we commit at
16066 if (!parser->in_template_argument_list_p
16067 /* In an expression context, having seen:
16071 we cannot be sure whether we are looking at a
16072 function-type (taking a "char" as a parameter) or a cast
16073 of some object of type "char" to "int". */
16074 && !parser->in_type_id_in_expr_p
16075 && cp_parser_uncommitted_to_tentative_parse_p (parser)
16076 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE)
16077 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_PAREN))
16078 cp_parser_commit_to_tentative_parse (parser);
16079 /* Parse the declarator. */
16080 declarator_token_start = token;
16081 declarator = cp_parser_declarator (parser,
16082 CP_PARSER_DECLARATOR_EITHER,
16083 /*ctor_dtor_or_conv_p=*/NULL,
16085 /*member_p=*/false);
16086 parser->default_arg_ok_p = saved_default_arg_ok_p;
16087 /* After the declarator, allow more attributes. */
16088 decl_specifiers.attributes
16089 = chainon (decl_specifiers.attributes,
16090 cp_parser_attributes_opt (parser));
16093 /* If the next token is an ellipsis, and we have not seen a
16094 declarator name, and the type of the declarator contains parameter
16095 packs but it is not a TYPE_PACK_EXPANSION, then we actually have
16096 a parameter pack expansion expression. Otherwise, leave the
16097 ellipsis for a C-style variadic function. */
16098 token = cp_lexer_peek_token (parser->lexer);
16099 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
16101 tree type = decl_specifiers.type;
16103 if (type && DECL_P (type))
16104 type = TREE_TYPE (type);
16107 && TREE_CODE (type) != TYPE_PACK_EXPANSION
16108 && declarator_can_be_parameter_pack (declarator)
16109 && (!declarator || !declarator->parameter_pack_p)
16110 && uses_parameter_packs (type))
16112 /* Consume the `...'. */
16113 cp_lexer_consume_token (parser->lexer);
16114 maybe_warn_variadic_templates ();
16116 /* Build a pack expansion type */
16118 declarator->parameter_pack_p = true;
16120 decl_specifiers.type = make_pack_expansion (type);
16124 /* The restriction on defining new types applies only to the type
16125 of the parameter, not to the default argument. */
16126 parser->type_definition_forbidden_message = saved_message;
16128 /* If the next token is `=', then process a default argument. */
16129 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
16131 /* Consume the `='. */
16132 cp_lexer_consume_token (parser->lexer);
16134 /* If we are defining a class, then the tokens that make up the
16135 default argument must be saved and processed later. */
16136 if (!template_parm_p && at_class_scope_p ()
16137 && TYPE_BEING_DEFINED (current_class_type)
16138 && !LAMBDA_TYPE_P (current_class_type))
16140 unsigned depth = 0;
16141 int maybe_template_id = 0;
16142 cp_token *first_token;
16145 /* Add tokens until we have processed the entire default
16146 argument. We add the range [first_token, token). */
16147 first_token = cp_lexer_peek_token (parser->lexer);
16152 /* Peek at the next token. */
16153 token = cp_lexer_peek_token (parser->lexer);
16154 /* What we do depends on what token we have. */
16155 switch (token->type)
16157 /* In valid code, a default argument must be
16158 immediately followed by a `,' `)', or `...'. */
16160 if (depth == 0 && maybe_template_id)
16162 /* If we've seen a '<', we might be in a
16163 template-argument-list. Until Core issue 325 is
16164 resolved, we don't know how this situation ought
16165 to be handled, so try to DTRT. We check whether
16166 what comes after the comma is a valid parameter
16167 declaration list. If it is, then the comma ends
16168 the default argument; otherwise the default
16169 argument continues. */
16170 bool error = false;
16173 /* Set ITALP so cp_parser_parameter_declaration_list
16174 doesn't decide to commit to this parse. */
16175 bool saved_italp = parser->in_template_argument_list_p;
16176 parser->in_template_argument_list_p = true;
16178 cp_parser_parse_tentatively (parser);
16179 cp_lexer_consume_token (parser->lexer);
16180 begin_scope (sk_function_parms, NULL_TREE);
16181 cp_parser_parameter_declaration_list (parser, &error);
16182 for (t = current_binding_level->names; t; t = DECL_CHAIN (t))
16183 pop_binding (DECL_NAME (t), t);
16185 if (!cp_parser_error_occurred (parser) && !error)
16187 cp_parser_abort_tentative_parse (parser);
16189 parser->in_template_argument_list_p = saved_italp;
16192 case CPP_CLOSE_PAREN:
16194 /* If we run into a non-nested `;', `}', or `]',
16195 then the code is invalid -- but the default
16196 argument is certainly over. */
16197 case CPP_SEMICOLON:
16198 case CPP_CLOSE_BRACE:
16199 case CPP_CLOSE_SQUARE:
16202 /* Update DEPTH, if necessary. */
16203 else if (token->type == CPP_CLOSE_PAREN
16204 || token->type == CPP_CLOSE_BRACE
16205 || token->type == CPP_CLOSE_SQUARE)
16209 case CPP_OPEN_PAREN:
16210 case CPP_OPEN_SQUARE:
16211 case CPP_OPEN_BRACE:
16217 /* This might be the comparison operator, or it might
16218 start a template argument list. */
16219 ++maybe_template_id;
16223 if (cxx_dialect == cxx98)
16225 /* Fall through for C++0x, which treats the `>>'
16226 operator like two `>' tokens in certain
16232 /* This might be an operator, or it might close a
16233 template argument list. But if a previous '<'
16234 started a template argument list, this will have
16235 closed it, so we can't be in one anymore. */
16236 maybe_template_id -= 1 + (token->type == CPP_RSHIFT);
16237 if (maybe_template_id < 0)
16238 maybe_template_id = 0;
16242 /* If we run out of tokens, issue an error message. */
16244 case CPP_PRAGMA_EOL:
16245 error_at (token->location, "file ends in default argument");
16251 /* In these cases, we should look for template-ids.
16252 For example, if the default argument is
16253 `X<int, double>()', we need to do name lookup to
16254 figure out whether or not `X' is a template; if
16255 so, the `,' does not end the default argument.
16257 That is not yet done. */
16264 /* If we've reached the end, stop. */
16268 /* Add the token to the token block. */
16269 token = cp_lexer_consume_token (parser->lexer);
16272 /* Create a DEFAULT_ARG to represent the unparsed default
16274 default_argument = make_node (DEFAULT_ARG);
16275 DEFARG_TOKENS (default_argument)
16276 = cp_token_cache_new (first_token, token);
16277 DEFARG_INSTANTIATIONS (default_argument) = NULL;
16279 /* Outside of a class definition, we can just parse the
16280 assignment-expression. */
16283 token = cp_lexer_peek_token (parser->lexer);
16285 = cp_parser_default_argument (parser, template_parm_p);
16288 if (!parser->default_arg_ok_p)
16290 if (flag_permissive)
16291 warning (0, "deprecated use of default argument for parameter of non-function");
16294 error_at (token->location,
16295 "default arguments are only "
16296 "permitted for function parameters");
16297 default_argument = NULL_TREE;
16300 else if ((declarator && declarator->parameter_pack_p)
16301 || (decl_specifiers.type
16302 && PACK_EXPANSION_P (decl_specifiers.type)))
16304 /* Find the name of the parameter pack. */
16305 cp_declarator *id_declarator = declarator;
16306 while (id_declarator && id_declarator->kind != cdk_id)
16307 id_declarator = id_declarator->declarator;
16309 if (id_declarator && id_declarator->kind == cdk_id)
16310 error_at (declarator_token_start->location,
16312 ? "template parameter pack %qD"
16313 " cannot have a default argument"
16314 : "parameter pack %qD cannot have a default argument",
16315 id_declarator->u.id.unqualified_name);
16317 error_at (declarator_token_start->location,
16319 ? "template parameter pack cannot have a default argument"
16320 : "parameter pack cannot have a default argument");
16322 default_argument = NULL_TREE;
16326 default_argument = NULL_TREE;
16328 return make_parameter_declarator (&decl_specifiers,
16333 /* Parse a default argument and return it.
16335 TEMPLATE_PARM_P is true if this is a default argument for a
16336 non-type template parameter. */
16338 cp_parser_default_argument (cp_parser *parser, bool template_parm_p)
16340 tree default_argument = NULL_TREE;
16341 bool saved_greater_than_is_operator_p;
16342 bool saved_local_variables_forbidden_p;
16344 /* Make sure that PARSER->GREATER_THAN_IS_OPERATOR_P is
16346 saved_greater_than_is_operator_p = parser->greater_than_is_operator_p;
16347 parser->greater_than_is_operator_p = !template_parm_p;
16348 /* Local variable names (and the `this' keyword) may not
16349 appear in a default argument. */
16350 saved_local_variables_forbidden_p = parser->local_variables_forbidden_p;
16351 parser->local_variables_forbidden_p = true;
16352 /* Parse the assignment-expression. */
16353 if (template_parm_p)
16354 push_deferring_access_checks (dk_no_deferred);
16356 = cp_parser_assignment_expression (parser, /*cast_p=*/false, NULL);
16357 if (template_parm_p)
16358 pop_deferring_access_checks ();
16359 parser->greater_than_is_operator_p = saved_greater_than_is_operator_p;
16360 parser->local_variables_forbidden_p = saved_local_variables_forbidden_p;
16362 return default_argument;
16365 /* Parse a function-body.
16368 compound_statement */
16371 cp_parser_function_body (cp_parser *parser)
16373 cp_parser_compound_statement (parser, NULL, false, true);
16376 /* Parse a ctor-initializer-opt followed by a function-body. Return
16377 true if a ctor-initializer was present. */
16380 cp_parser_ctor_initializer_opt_and_function_body (cp_parser *parser)
16383 bool ctor_initializer_p;
16384 const bool check_body_p =
16385 DECL_CONSTRUCTOR_P (current_function_decl)
16386 && DECL_DECLARED_CONSTEXPR_P (current_function_decl);
16389 /* Begin the function body. */
16390 body = begin_function_body ();
16391 /* Parse the optional ctor-initializer. */
16392 ctor_initializer_p = cp_parser_ctor_initializer_opt (parser);
16394 /* If we're parsing a constexpr constructor definition, we need
16395 to check that the constructor body is indeed empty. However,
16396 before we get to cp_parser_function_body lot of junk has been
16397 generated, so we can't just check that we have an empty block.
16398 Rather we take a snapshot of the outermost block, and check whether
16399 cp_parser_function_body changed its state. */
16403 if (TREE_CODE (list) == BIND_EXPR)
16404 list = BIND_EXPR_BODY (list);
16405 if (TREE_CODE (list) == STATEMENT_LIST
16406 && STATEMENT_LIST_TAIL (list) != NULL)
16407 last = STATEMENT_LIST_TAIL (list)->stmt;
16409 /* Parse the function-body. */
16410 cp_parser_function_body (parser);
16412 check_constexpr_ctor_body (last, list);
16413 /* Finish the function body. */
16414 finish_function_body (body);
16416 return ctor_initializer_p;
16419 /* Parse an initializer.
16422 = initializer-clause
16423 ( expression-list )
16425 Returns an expression representing the initializer. If no
16426 initializer is present, NULL_TREE is returned.
16428 *IS_DIRECT_INIT is set to FALSE if the `= initializer-clause'
16429 production is used, and TRUE otherwise. *IS_DIRECT_INIT is
16430 set to TRUE if there is no initializer present. If there is an
16431 initializer, and it is not a constant-expression, *NON_CONSTANT_P
16432 is set to true; otherwise it is set to false. */
16435 cp_parser_initializer (cp_parser* parser, bool* is_direct_init,
16436 bool* non_constant_p)
16441 /* Peek at the next token. */
16442 token = cp_lexer_peek_token (parser->lexer);
16444 /* Let our caller know whether or not this initializer was
16446 *is_direct_init = (token->type != CPP_EQ);
16447 /* Assume that the initializer is constant. */
16448 *non_constant_p = false;
16450 if (token->type == CPP_EQ)
16452 /* Consume the `='. */
16453 cp_lexer_consume_token (parser->lexer);
16454 /* Parse the initializer-clause. */
16455 init = cp_parser_initializer_clause (parser, non_constant_p);
16457 else if (token->type == CPP_OPEN_PAREN)
16460 vec = cp_parser_parenthesized_expression_list (parser, non_attr,
16462 /*allow_expansion_p=*/true,
16465 return error_mark_node;
16466 init = build_tree_list_vec (vec);
16467 release_tree_vector (vec);
16469 else if (token->type == CPP_OPEN_BRACE)
16471 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
16472 init = cp_parser_braced_list (parser, non_constant_p);
16473 CONSTRUCTOR_IS_DIRECT_INIT (init) = 1;
16477 /* Anything else is an error. */
16478 cp_parser_error (parser, "expected initializer");
16479 init = error_mark_node;
16485 /* Parse an initializer-clause.
16487 initializer-clause:
16488 assignment-expression
16491 Returns an expression representing the initializer.
16493 If the `assignment-expression' production is used the value
16494 returned is simply a representation for the expression.
16496 Otherwise, calls cp_parser_braced_list. */
16499 cp_parser_initializer_clause (cp_parser* parser, bool* non_constant_p)
16503 /* Assume the expression is constant. */
16504 *non_constant_p = false;
16506 /* If it is not a `{', then we are looking at an
16507 assignment-expression. */
16508 if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE))
16511 = cp_parser_constant_expression (parser,
16512 /*allow_non_constant_p=*/true,
16514 if (!*non_constant_p)
16516 /* We only want to fold if this is really a constant
16517 expression. FIXME Actually, we don't want to fold here, but in
16519 tree folded = fold_non_dependent_expr (initializer);
16520 folded = maybe_constant_value (folded);
16521 if (TREE_CONSTANT (folded))
16522 initializer = folded;
16526 initializer = cp_parser_braced_list (parser, non_constant_p);
16528 return initializer;
16531 /* Parse a brace-enclosed initializer list.
16534 { initializer-list , [opt] }
16537 Returns a CONSTRUCTOR. The CONSTRUCTOR_ELTS will be
16538 the elements of the initializer-list (or NULL, if the last
16539 production is used). The TREE_TYPE for the CONSTRUCTOR will be
16540 NULL_TREE. There is no way to detect whether or not the optional
16541 trailing `,' was provided. NON_CONSTANT_P is as for
16542 cp_parser_initializer. */
16545 cp_parser_braced_list (cp_parser* parser, bool* non_constant_p)
16549 /* Consume the `{' token. */
16550 cp_lexer_consume_token (parser->lexer);
16551 /* Create a CONSTRUCTOR to represent the braced-initializer. */
16552 initializer = make_node (CONSTRUCTOR);
16553 /* If it's not a `}', then there is a non-trivial initializer. */
16554 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_BRACE))
16556 /* Parse the initializer list. */
16557 CONSTRUCTOR_ELTS (initializer)
16558 = cp_parser_initializer_list (parser, non_constant_p);
16559 /* A trailing `,' token is allowed. */
16560 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
16561 cp_lexer_consume_token (parser->lexer);
16563 /* Now, there should be a trailing `}'. */
16564 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
16565 TREE_TYPE (initializer) = init_list_type_node;
16566 return initializer;
16569 /* Parse an initializer-list.
16572 initializer-clause ... [opt]
16573 initializer-list , initializer-clause ... [opt]
16578 identifier : initializer-clause
16579 initializer-list, identifier : initializer-clause
16581 Returns a VEC of constructor_elt. The VALUE of each elt is an expression
16582 for the initializer. If the INDEX of the elt is non-NULL, it is the
16583 IDENTIFIER_NODE naming the field to initialize. NON_CONSTANT_P is
16584 as for cp_parser_initializer. */
16586 static VEC(constructor_elt,gc) *
16587 cp_parser_initializer_list (cp_parser* parser, bool* non_constant_p)
16589 VEC(constructor_elt,gc) *v = NULL;
16591 /* Assume all of the expressions are constant. */
16592 *non_constant_p = false;
16594 /* Parse the rest of the list. */
16600 bool clause_non_constant_p;
16602 /* If the next token is an identifier and the following one is a
16603 colon, we are looking at the GNU designated-initializer
16605 if (cp_parser_allow_gnu_extensions_p (parser)
16606 && cp_lexer_next_token_is (parser->lexer, CPP_NAME)
16607 && cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_COLON)
16609 /* Warn the user that they are using an extension. */
16610 pedwarn (input_location, OPT_pedantic,
16611 "ISO C++ does not allow designated initializers");
16612 /* Consume the identifier. */
16613 identifier = cp_lexer_consume_token (parser->lexer)->u.value;
16614 /* Consume the `:'. */
16615 cp_lexer_consume_token (parser->lexer);
16618 identifier = NULL_TREE;
16620 /* Parse the initializer. */
16621 initializer = cp_parser_initializer_clause (parser,
16622 &clause_non_constant_p);
16623 /* If any clause is non-constant, so is the entire initializer. */
16624 if (clause_non_constant_p)
16625 *non_constant_p = true;
16627 /* If we have an ellipsis, this is an initializer pack
16629 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
16631 /* Consume the `...'. */
16632 cp_lexer_consume_token (parser->lexer);
16634 /* Turn the initializer into an initializer expansion. */
16635 initializer = make_pack_expansion (initializer);
16638 /* Add it to the vector. */
16639 CONSTRUCTOR_APPEND_ELT(v, identifier, initializer);
16641 /* If the next token is not a comma, we have reached the end of
16643 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
16646 /* Peek at the next token. */
16647 token = cp_lexer_peek_nth_token (parser->lexer, 2);
16648 /* If the next token is a `}', then we're still done. An
16649 initializer-clause can have a trailing `,' after the
16650 initializer-list and before the closing `}'. */
16651 if (token->type == CPP_CLOSE_BRACE)
16654 /* Consume the `,' token. */
16655 cp_lexer_consume_token (parser->lexer);
16661 /* Classes [gram.class] */
16663 /* Parse a class-name.
16669 TYPENAME_KEYWORD_P is true iff the `typename' keyword has been used
16670 to indicate that names looked up in dependent types should be
16671 assumed to be types. TEMPLATE_KEYWORD_P is true iff the `template'
16672 keyword has been used to indicate that the name that appears next
16673 is a template. TAG_TYPE indicates the explicit tag given before
16674 the type name, if any. If CHECK_DEPENDENCY_P is FALSE, names are
16675 looked up in dependent scopes. If CLASS_HEAD_P is TRUE, this class
16676 is the class being defined in a class-head.
16678 Returns the TYPE_DECL representing the class. */
16681 cp_parser_class_name (cp_parser *parser,
16682 bool typename_keyword_p,
16683 bool template_keyword_p,
16684 enum tag_types tag_type,
16685 bool check_dependency_p,
16687 bool is_declaration)
16693 tree identifier = NULL_TREE;
16695 /* All class-names start with an identifier. */
16696 token = cp_lexer_peek_token (parser->lexer);
16697 if (token->type != CPP_NAME && token->type != CPP_TEMPLATE_ID)
16699 cp_parser_error (parser, "expected class-name");
16700 return error_mark_node;
16703 /* PARSER->SCOPE can be cleared when parsing the template-arguments
16704 to a template-id, so we save it here. */
16705 scope = parser->scope;
16706 if (scope == error_mark_node)
16707 return error_mark_node;
16709 /* Any name names a type if we're following the `typename' keyword
16710 in a qualified name where the enclosing scope is type-dependent. */
16711 typename_p = (typename_keyword_p && scope && TYPE_P (scope)
16712 && dependent_type_p (scope));
16713 /* Handle the common case (an identifier, but not a template-id)
16715 if (token->type == CPP_NAME
16716 && !cp_parser_nth_token_starts_template_argument_list_p (parser, 2))
16718 cp_token *identifier_token;
16721 /* Look for the identifier. */
16722 identifier_token = cp_lexer_peek_token (parser->lexer);
16723 ambiguous_p = identifier_token->ambiguous_p;
16724 identifier = cp_parser_identifier (parser);
16725 /* If the next token isn't an identifier, we are certainly not
16726 looking at a class-name. */
16727 if (identifier == error_mark_node)
16728 decl = error_mark_node;
16729 /* If we know this is a type-name, there's no need to look it
16731 else if (typename_p)
16735 tree ambiguous_decls;
16736 /* If we already know that this lookup is ambiguous, then
16737 we've already issued an error message; there's no reason
16741 cp_parser_simulate_error (parser);
16742 return error_mark_node;
16744 /* If the next token is a `::', then the name must be a type
16747 [basic.lookup.qual]
16749 During the lookup for a name preceding the :: scope
16750 resolution operator, object, function, and enumerator
16751 names are ignored. */
16752 if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
16753 tag_type = typename_type;
16754 /* Look up the name. */
16755 decl = cp_parser_lookup_name (parser, identifier,
16757 /*is_template=*/false,
16758 /*is_namespace=*/false,
16759 check_dependency_p,
16761 identifier_token->location);
16762 if (ambiguous_decls)
16764 if (cp_parser_parsing_tentatively (parser))
16765 cp_parser_simulate_error (parser);
16766 return error_mark_node;
16772 /* Try a template-id. */
16773 decl = cp_parser_template_id (parser, template_keyword_p,
16774 check_dependency_p,
16776 if (decl == error_mark_node)
16777 return error_mark_node;
16780 decl = cp_parser_maybe_treat_template_as_class (decl, class_head_p);
16782 /* If this is a typename, create a TYPENAME_TYPE. */
16783 if (typename_p && decl != error_mark_node)
16785 decl = make_typename_type (scope, decl, typename_type,
16786 /*complain=*/tf_error);
16787 if (decl != error_mark_node)
16788 decl = TYPE_NAME (decl);
16791 /* Check to see that it is really the name of a class. */
16792 if (TREE_CODE (decl) == TEMPLATE_ID_EXPR
16793 && TREE_CODE (TREE_OPERAND (decl, 0)) == IDENTIFIER_NODE
16794 && cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
16795 /* Situations like this:
16797 template <typename T> struct A {
16798 typename T::template X<int>::I i;
16801 are problematic. Is `T::template X<int>' a class-name? The
16802 standard does not seem to be definitive, but there is no other
16803 valid interpretation of the following `::'. Therefore, those
16804 names are considered class-names. */
16806 decl = make_typename_type (scope, decl, tag_type, tf_error);
16807 if (decl != error_mark_node)
16808 decl = TYPE_NAME (decl);
16810 else if (TREE_CODE (decl) != TYPE_DECL
16811 || TREE_TYPE (decl) == error_mark_node
16812 || !MAYBE_CLASS_TYPE_P (TREE_TYPE (decl))
16813 /* In Objective-C 2.0, a classname followed by '.' starts a
16814 dot-syntax expression, and it's not a type-name. */
16815 || (c_dialect_objc ()
16816 && cp_lexer_peek_token (parser->lexer)->type == CPP_DOT
16817 && objc_is_class_name (decl)))
16818 decl = error_mark_node;
16820 if (decl == error_mark_node)
16821 cp_parser_error (parser, "expected class-name");
16822 else if (identifier && !parser->scope)
16823 maybe_note_name_used_in_class (identifier, decl);
16828 /* Parse a class-specifier.
16831 class-head { member-specification [opt] }
16833 Returns the TREE_TYPE representing the class. */
16836 cp_parser_class_specifier_1 (cp_parser* parser)
16839 tree attributes = NULL_TREE;
16840 bool nested_name_specifier_p;
16841 unsigned saved_num_template_parameter_lists;
16842 bool saved_in_function_body;
16843 bool saved_in_unbraced_linkage_specification_p;
16844 tree old_scope = NULL_TREE;
16845 tree scope = NULL_TREE;
16847 cp_token *closing_brace;
16849 push_deferring_access_checks (dk_no_deferred);
16851 /* Parse the class-head. */
16852 type = cp_parser_class_head (parser,
16853 &nested_name_specifier_p,
16856 /* If the class-head was a semantic disaster, skip the entire body
16860 cp_parser_skip_to_end_of_block_or_statement (parser);
16861 pop_deferring_access_checks ();
16862 return error_mark_node;
16865 /* Look for the `{'. */
16866 if (!cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE))
16868 pop_deferring_access_checks ();
16869 return error_mark_node;
16872 /* Process the base classes. If they're invalid, skip the
16873 entire class body. */
16874 if (!xref_basetypes (type, bases))
16876 /* Consuming the closing brace yields better error messages
16878 if (cp_parser_skip_to_closing_brace (parser))
16879 cp_lexer_consume_token (parser->lexer);
16880 pop_deferring_access_checks ();
16881 return error_mark_node;
16884 /* Issue an error message if type-definitions are forbidden here. */
16885 cp_parser_check_type_definition (parser);
16886 /* Remember that we are defining one more class. */
16887 ++parser->num_classes_being_defined;
16888 /* Inside the class, surrounding template-parameter-lists do not
16890 saved_num_template_parameter_lists
16891 = parser->num_template_parameter_lists;
16892 parser->num_template_parameter_lists = 0;
16893 /* We are not in a function body. */
16894 saved_in_function_body = parser->in_function_body;
16895 parser->in_function_body = false;
16896 /* We are not immediately inside an extern "lang" block. */
16897 saved_in_unbraced_linkage_specification_p
16898 = parser->in_unbraced_linkage_specification_p;
16899 parser->in_unbraced_linkage_specification_p = false;
16901 /* Start the class. */
16902 if (nested_name_specifier_p)
16904 scope = CP_DECL_CONTEXT (TYPE_MAIN_DECL (type));
16905 old_scope = push_inner_scope (scope);
16907 type = begin_class_definition (type, attributes);
16909 if (type == error_mark_node)
16910 /* If the type is erroneous, skip the entire body of the class. */
16911 cp_parser_skip_to_closing_brace (parser);
16913 /* Parse the member-specification. */
16914 cp_parser_member_specification_opt (parser);
16916 /* Look for the trailing `}'. */
16917 closing_brace = cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
16918 /* Look for trailing attributes to apply to this class. */
16919 if (cp_parser_allow_gnu_extensions_p (parser))
16920 attributes = cp_parser_attributes_opt (parser);
16921 if (type != error_mark_node)
16922 type = finish_struct (type, attributes);
16923 if (nested_name_specifier_p)
16924 pop_inner_scope (old_scope, scope);
16926 /* We've finished a type definition. Check for the common syntax
16927 error of forgetting a semicolon after the definition. We need to
16928 be careful, as we can't just check for not-a-semicolon and be done
16929 with it; the user might have typed:
16931 class X { } c = ...;
16932 class X { } *p = ...;
16934 and so forth. Instead, enumerate all the possible tokens that
16935 might follow this production; if we don't see one of them, then
16936 complain and silently insert the semicolon. */
16938 cp_token *token = cp_lexer_peek_token (parser->lexer);
16939 bool want_semicolon = true;
16941 switch (token->type)
16944 case CPP_SEMICOLON:
16947 case CPP_OPEN_PAREN:
16948 case CPP_CLOSE_PAREN:
16950 want_semicolon = false;
16953 /* While it's legal for type qualifiers and storage class
16954 specifiers to follow type definitions in the grammar, only
16955 compiler testsuites contain code like that. Assume that if
16956 we see such code, then what we're really seeing is a case
16960 const <type> var = ...;
16965 static <type> func (...) ...
16967 i.e. the qualifier or specifier applies to the next
16968 declaration. To do so, however, we need to look ahead one
16969 more token to see if *that* token is a type specifier.
16971 This code could be improved to handle:
16974 static const <type> var = ...; */
16976 if (keyword_is_decl_specifier (token->keyword))
16978 cp_token *lookahead = cp_lexer_peek_nth_token (parser->lexer, 2);
16980 /* Handling user-defined types here would be nice, but very
16983 = (lookahead->type == CPP_KEYWORD
16984 && keyword_begins_type_specifier (lookahead->keyword));
16991 /* If we don't have a type, then something is very wrong and we
16992 shouldn't try to do anything clever. Likewise for not seeing the
16994 if (closing_brace && TYPE_P (type) && want_semicolon)
16996 cp_token_position prev
16997 = cp_lexer_previous_token_position (parser->lexer);
16998 cp_token *prev_token = cp_lexer_token_at (parser->lexer, prev);
16999 location_t loc = prev_token->location;
17001 if (CLASSTYPE_DECLARED_CLASS (type))
17002 error_at (loc, "expected %<;%> after class definition");
17003 else if (TREE_CODE (type) == RECORD_TYPE)
17004 error_at (loc, "expected %<;%> after struct definition");
17005 else if (TREE_CODE (type) == UNION_TYPE)
17006 error_at (loc, "expected %<;%> after union definition");
17008 gcc_unreachable ();
17010 /* Unget one token and smash it to look as though we encountered
17011 a semicolon in the input stream. */
17012 cp_lexer_set_token_position (parser->lexer, prev);
17013 token = cp_lexer_peek_token (parser->lexer);
17014 token->type = CPP_SEMICOLON;
17015 token->keyword = RID_MAX;
17019 /* If this class is not itself within the scope of another class,
17020 then we need to parse the bodies of all of the queued function
17021 definitions. Note that the queued functions defined in a class
17022 are not always processed immediately following the
17023 class-specifier for that class. Consider:
17026 struct B { void f() { sizeof (A); } };
17029 If `f' were processed before the processing of `A' were
17030 completed, there would be no way to compute the size of `A'.
17031 Note that the nesting we are interested in here is lexical --
17032 not the semantic nesting given by TYPE_CONTEXT. In particular,
17035 struct A { struct B; };
17036 struct A::B { void f() { } };
17038 there is no need to delay the parsing of `A::B::f'. */
17039 if (--parser->num_classes_being_defined == 0)
17042 tree class_type = NULL_TREE;
17043 tree pushed_scope = NULL_TREE;
17045 cp_default_arg_entry *e;
17047 /* In a first pass, parse default arguments to the functions.
17048 Then, in a second pass, parse the bodies of the functions.
17049 This two-phased approach handles cases like:
17057 FOR_EACH_VEC_ELT (cp_default_arg_entry, unparsed_funs_with_default_args,
17061 /* If there are default arguments that have not yet been processed,
17062 take care of them now. */
17063 if (class_type != e->class_type)
17066 pop_scope (pushed_scope);
17067 class_type = e->class_type;
17068 pushed_scope = push_scope (class_type);
17070 /* Make sure that any template parameters are in scope. */
17071 maybe_begin_member_template_processing (fn);
17072 /* Parse the default argument expressions. */
17073 cp_parser_late_parsing_default_args (parser, fn);
17074 /* Remove any template parameters from the symbol table. */
17075 maybe_end_member_template_processing ();
17078 pop_scope (pushed_scope);
17079 VEC_truncate (cp_default_arg_entry, unparsed_funs_with_default_args, 0);
17080 /* Now parse the body of the functions. */
17081 FOR_EACH_VEC_ELT (tree, unparsed_funs_with_definitions, ix, fn)
17082 cp_parser_late_parsing_for_member (parser, fn);
17083 VEC_truncate (tree, unparsed_funs_with_definitions, 0);
17086 /* Put back any saved access checks. */
17087 pop_deferring_access_checks ();
17089 /* Restore saved state. */
17090 parser->in_function_body = saved_in_function_body;
17091 parser->num_template_parameter_lists
17092 = saved_num_template_parameter_lists;
17093 parser->in_unbraced_linkage_specification_p
17094 = saved_in_unbraced_linkage_specification_p;
17100 cp_parser_class_specifier (cp_parser* parser)
17103 timevar_push (TV_PARSE_STRUCT);
17104 ret = cp_parser_class_specifier_1 (parser);
17105 timevar_pop (TV_PARSE_STRUCT);
17109 /* Parse a class-head.
17112 class-key identifier [opt] base-clause [opt]
17113 class-key nested-name-specifier identifier class-virt-specifier [opt] base-clause [opt]
17114 class-key nested-name-specifier [opt] template-id
17117 class-virt-specifier:
17121 class-key attributes identifier [opt] base-clause [opt]
17122 class-key attributes nested-name-specifier identifier base-clause [opt]
17123 class-key attributes nested-name-specifier [opt] template-id
17126 Upon return BASES is initialized to the list of base classes (or
17127 NULL, if there are none) in the same form returned by
17128 cp_parser_base_clause.
17130 Returns the TYPE of the indicated class. Sets
17131 *NESTED_NAME_SPECIFIER_P to TRUE iff one of the productions
17132 involving a nested-name-specifier was used, and FALSE otherwise.
17134 Returns error_mark_node if this is not a class-head.
17136 Returns NULL_TREE if the class-head is syntactically valid, but
17137 semantically invalid in a way that means we should skip the entire
17138 body of the class. */
17141 cp_parser_class_head (cp_parser* parser,
17142 bool* nested_name_specifier_p,
17143 tree *attributes_p,
17146 tree nested_name_specifier;
17147 enum tag_types class_key;
17148 tree id = NULL_TREE;
17149 tree type = NULL_TREE;
17151 cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
17152 bool template_id_p = false;
17153 bool qualified_p = false;
17154 bool invalid_nested_name_p = false;
17155 bool invalid_explicit_specialization_p = false;
17156 bool saved_colon_corrects_to_scope_p = parser->colon_corrects_to_scope_p;
17157 tree pushed_scope = NULL_TREE;
17158 unsigned num_templates;
17159 cp_token *type_start_token = NULL, *nested_name_specifier_token_start = NULL;
17160 /* Assume no nested-name-specifier will be present. */
17161 *nested_name_specifier_p = false;
17162 /* Assume no template parameter lists will be used in defining the
17165 parser->colon_corrects_to_scope_p = false;
17167 *bases = NULL_TREE;
17169 /* Look for the class-key. */
17170 class_key = cp_parser_class_key (parser);
17171 if (class_key == none_type)
17172 return error_mark_node;
17174 /* Parse the attributes. */
17175 attributes = cp_parser_attributes_opt (parser);
17177 /* If the next token is `::', that is invalid -- but sometimes
17178 people do try to write:
17182 Handle this gracefully by accepting the extra qualifier, and then
17183 issuing an error about it later if this really is a
17184 class-head. If it turns out just to be an elaborated type
17185 specifier, remain silent. */
17186 if (cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false))
17187 qualified_p = true;
17189 push_deferring_access_checks (dk_no_check);
17191 /* Determine the name of the class. Begin by looking for an
17192 optional nested-name-specifier. */
17193 nested_name_specifier_token_start = cp_lexer_peek_token (parser->lexer);
17194 nested_name_specifier
17195 = cp_parser_nested_name_specifier_opt (parser,
17196 /*typename_keyword_p=*/false,
17197 /*check_dependency_p=*/false,
17199 /*is_declaration=*/false);
17200 /* If there was a nested-name-specifier, then there *must* be an
17202 if (nested_name_specifier)
17204 type_start_token = cp_lexer_peek_token (parser->lexer);
17205 /* Although the grammar says `identifier', it really means
17206 `class-name' or `template-name'. You are only allowed to
17207 define a class that has already been declared with this
17210 The proposed resolution for Core Issue 180 says that wherever
17211 you see `class T::X' you should treat `X' as a type-name.
17213 It is OK to define an inaccessible class; for example:
17215 class A { class B; };
17218 We do not know if we will see a class-name, or a
17219 template-name. We look for a class-name first, in case the
17220 class-name is a template-id; if we looked for the
17221 template-name first we would stop after the template-name. */
17222 cp_parser_parse_tentatively (parser);
17223 type = cp_parser_class_name (parser,
17224 /*typename_keyword_p=*/false,
17225 /*template_keyword_p=*/false,
17227 /*check_dependency_p=*/false,
17228 /*class_head_p=*/true,
17229 /*is_declaration=*/false);
17230 /* If that didn't work, ignore the nested-name-specifier. */
17231 if (!cp_parser_parse_definitely (parser))
17233 invalid_nested_name_p = true;
17234 type_start_token = cp_lexer_peek_token (parser->lexer);
17235 id = cp_parser_identifier (parser);
17236 if (id == error_mark_node)
17239 /* If we could not find a corresponding TYPE, treat this
17240 declaration like an unqualified declaration. */
17241 if (type == error_mark_node)
17242 nested_name_specifier = NULL_TREE;
17243 /* Otherwise, count the number of templates used in TYPE and its
17244 containing scopes. */
17249 for (scope = TREE_TYPE (type);
17250 scope && TREE_CODE (scope) != NAMESPACE_DECL;
17251 scope = (TYPE_P (scope)
17252 ? TYPE_CONTEXT (scope)
17253 : DECL_CONTEXT (scope)))
17255 && CLASS_TYPE_P (scope)
17256 && CLASSTYPE_TEMPLATE_INFO (scope)
17257 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (scope))
17258 && !CLASSTYPE_TEMPLATE_SPECIALIZATION (scope))
17262 /* Otherwise, the identifier is optional. */
17265 /* We don't know whether what comes next is a template-id,
17266 an identifier, or nothing at all. */
17267 cp_parser_parse_tentatively (parser);
17268 /* Check for a template-id. */
17269 type_start_token = cp_lexer_peek_token (parser->lexer);
17270 id = cp_parser_template_id (parser,
17271 /*template_keyword_p=*/false,
17272 /*check_dependency_p=*/true,
17273 /*is_declaration=*/true);
17274 /* If that didn't work, it could still be an identifier. */
17275 if (!cp_parser_parse_definitely (parser))
17277 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
17279 type_start_token = cp_lexer_peek_token (parser->lexer);
17280 id = cp_parser_identifier (parser);
17287 template_id_p = true;
17292 pop_deferring_access_checks ();
17296 cp_parser_check_for_invalid_template_id (parser, id,
17297 type_start_token->location);
17298 virt_specifiers = cp_parser_virt_specifier_seq_opt (parser);
17301 /* If it's not a `:' or a `{' then we can't really be looking at a
17302 class-head, since a class-head only appears as part of a
17303 class-specifier. We have to detect this situation before calling
17304 xref_tag, since that has irreversible side-effects. */
17305 if (!cp_parser_next_token_starts_class_definition_p (parser))
17307 cp_parser_error (parser, "expected %<{%> or %<:%>");
17308 type = error_mark_node;
17312 /* At this point, we're going ahead with the class-specifier, even
17313 if some other problem occurs. */
17314 cp_parser_commit_to_tentative_parse (parser);
17315 if (virt_specifiers & VIRT_SPEC_OVERRIDE)
17317 cp_parser_error (parser,
17318 "cannot specify %<override%> for a class");
17319 type = error_mark_node;
17322 /* Issue the error about the overly-qualified name now. */
17325 cp_parser_error (parser,
17326 "global qualification of class name is invalid");
17327 type = error_mark_node;
17330 else if (invalid_nested_name_p)
17332 cp_parser_error (parser,
17333 "qualified name does not name a class");
17334 type = error_mark_node;
17337 else if (nested_name_specifier)
17341 /* Reject typedef-names in class heads. */
17342 if (!DECL_IMPLICIT_TYPEDEF_P (type))
17344 error_at (type_start_token->location,
17345 "invalid class name in declaration of %qD",
17351 /* Figure out in what scope the declaration is being placed. */
17352 scope = current_scope ();
17353 /* If that scope does not contain the scope in which the
17354 class was originally declared, the program is invalid. */
17355 if (scope && !is_ancestor (scope, nested_name_specifier))
17357 if (at_namespace_scope_p ())
17358 error_at (type_start_token->location,
17359 "declaration of %qD in namespace %qD which does not "
17361 type, scope, nested_name_specifier);
17363 error_at (type_start_token->location,
17364 "declaration of %qD in %qD which does not enclose %qD",
17365 type, scope, nested_name_specifier);
17371 A declarator-id shall not be qualified except for the
17372 definition of a ... nested class outside of its class
17373 ... [or] the definition or explicit instantiation of a
17374 class member of a namespace outside of its namespace. */
17375 if (scope == nested_name_specifier)
17377 permerror (nested_name_specifier_token_start->location,
17378 "extra qualification not allowed");
17379 nested_name_specifier = NULL_TREE;
17383 /* An explicit-specialization must be preceded by "template <>". If
17384 it is not, try to recover gracefully. */
17385 if (at_namespace_scope_p ()
17386 && parser->num_template_parameter_lists == 0
17389 error_at (type_start_token->location,
17390 "an explicit specialization must be preceded by %<template <>%>");
17391 invalid_explicit_specialization_p = true;
17392 /* Take the same action that would have been taken by
17393 cp_parser_explicit_specialization. */
17394 ++parser->num_template_parameter_lists;
17395 begin_specialization ();
17397 /* There must be no "return" statements between this point and the
17398 end of this function; set "type "to the correct return value and
17399 use "goto done;" to return. */
17400 /* Make sure that the right number of template parameters were
17402 if (!cp_parser_check_template_parameters (parser, num_templates,
17403 type_start_token->location,
17404 /*declarator=*/NULL))
17406 /* If something went wrong, there is no point in even trying to
17407 process the class-definition. */
17412 /* Look up the type. */
17415 if (TREE_CODE (id) == TEMPLATE_ID_EXPR
17416 && (DECL_FUNCTION_TEMPLATE_P (TREE_OPERAND (id, 0))
17417 || TREE_CODE (TREE_OPERAND (id, 0)) == OVERLOAD))
17419 error_at (type_start_token->location,
17420 "function template %qD redeclared as a class template", id);
17421 type = error_mark_node;
17425 type = TREE_TYPE (id);
17426 type = maybe_process_partial_specialization (type);
17428 if (nested_name_specifier)
17429 pushed_scope = push_scope (nested_name_specifier);
17431 else if (nested_name_specifier)
17437 template <typename T> struct S { struct T };
17438 template <typename T> struct S<T>::T { };
17440 we will get a TYPENAME_TYPE when processing the definition of
17441 `S::T'. We need to resolve it to the actual type before we
17442 try to define it. */
17443 if (TREE_CODE (TREE_TYPE (type)) == TYPENAME_TYPE)
17445 class_type = resolve_typename_type (TREE_TYPE (type),
17446 /*only_current_p=*/false);
17447 if (TREE_CODE (class_type) != TYPENAME_TYPE)
17448 type = TYPE_NAME (class_type);
17451 cp_parser_error (parser, "could not resolve typename type");
17452 type = error_mark_node;
17456 if (maybe_process_partial_specialization (TREE_TYPE (type))
17457 == error_mark_node)
17463 class_type = current_class_type;
17464 /* Enter the scope indicated by the nested-name-specifier. */
17465 pushed_scope = push_scope (nested_name_specifier);
17466 /* Get the canonical version of this type. */
17467 type = TYPE_MAIN_DECL (TREE_TYPE (type));
17468 if (PROCESSING_REAL_TEMPLATE_DECL_P ()
17469 && !CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_TYPE (type)))
17471 type = push_template_decl (type);
17472 if (type == error_mark_node)
17479 type = TREE_TYPE (type);
17480 *nested_name_specifier_p = true;
17482 else /* The name is not a nested name. */
17484 /* If the class was unnamed, create a dummy name. */
17486 id = make_anon_name ();
17487 type = xref_tag (class_key, id, /*tag_scope=*/ts_current,
17488 parser->num_template_parameter_lists);
17491 /* Indicate whether this class was declared as a `class' or as a
17493 if (TREE_CODE (type) == RECORD_TYPE)
17494 CLASSTYPE_DECLARED_CLASS (type) = (class_key == class_type);
17495 cp_parser_check_class_key (class_key, type);
17497 /* If this type was already complete, and we see another definition,
17498 that's an error. */
17499 if (type != error_mark_node && COMPLETE_TYPE_P (type))
17501 error_at (type_start_token->location, "redefinition of %q#T",
17503 error_at (type_start_token->location, "previous definition of %q+#T",
17508 else if (type == error_mark_node)
17511 /* We will have entered the scope containing the class; the names of
17512 base classes should be looked up in that context. For example:
17514 struct A { struct B {}; struct C; };
17515 struct A::C : B {};
17519 /* Get the list of base-classes, if there is one. */
17520 if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
17521 *bases = cp_parser_base_clause (parser);
17524 /* Leave the scope given by the nested-name-specifier. We will
17525 enter the class scope itself while processing the members. */
17527 pop_scope (pushed_scope);
17529 if (invalid_explicit_specialization_p)
17531 end_specialization ();
17532 --parser->num_template_parameter_lists;
17536 DECL_SOURCE_LOCATION (TYPE_NAME (type)) = type_start_token->location;
17537 *attributes_p = attributes;
17538 if (type && (virt_specifiers & VIRT_SPEC_FINAL))
17539 CLASSTYPE_FINAL (type) = 1;
17541 parser->colon_corrects_to_scope_p = saved_colon_corrects_to_scope_p;
17545 /* Parse a class-key.
17552 Returns the kind of class-key specified, or none_type to indicate
17555 static enum tag_types
17556 cp_parser_class_key (cp_parser* parser)
17559 enum tag_types tag_type;
17561 /* Look for the class-key. */
17562 token = cp_parser_require (parser, CPP_KEYWORD, RT_CLASS_KEY);
17566 /* Check to see if the TOKEN is a class-key. */
17567 tag_type = cp_parser_token_is_class_key (token);
17569 cp_parser_error (parser, "expected class-key");
17573 /* Parse an (optional) member-specification.
17575 member-specification:
17576 member-declaration member-specification [opt]
17577 access-specifier : member-specification [opt] */
17580 cp_parser_member_specification_opt (cp_parser* parser)
17587 /* Peek at the next token. */
17588 token = cp_lexer_peek_token (parser->lexer);
17589 /* If it's a `}', or EOF then we've seen all the members. */
17590 if (token->type == CPP_CLOSE_BRACE
17591 || token->type == CPP_EOF
17592 || token->type == CPP_PRAGMA_EOL)
17595 /* See if this token is a keyword. */
17596 keyword = token->keyword;
17600 case RID_PROTECTED:
17602 /* Consume the access-specifier. */
17603 cp_lexer_consume_token (parser->lexer);
17604 /* Remember which access-specifier is active. */
17605 current_access_specifier = token->u.value;
17606 /* Look for the `:'. */
17607 cp_parser_require (parser, CPP_COLON, RT_COLON);
17611 /* Accept #pragmas at class scope. */
17612 if (token->type == CPP_PRAGMA)
17614 cp_parser_pragma (parser, pragma_external);
17618 /* Otherwise, the next construction must be a
17619 member-declaration. */
17620 cp_parser_member_declaration (parser);
17625 /* Parse a member-declaration.
17627 member-declaration:
17628 decl-specifier-seq [opt] member-declarator-list [opt] ;
17629 function-definition ; [opt]
17630 :: [opt] nested-name-specifier template [opt] unqualified-id ;
17632 template-declaration
17634 member-declarator-list:
17636 member-declarator-list , member-declarator
17639 declarator pure-specifier [opt]
17640 declarator constant-initializer [opt]
17641 identifier [opt] : constant-expression
17645 member-declaration:
17646 __extension__ member-declaration
17649 declarator attributes [opt] pure-specifier [opt]
17650 declarator attributes [opt] constant-initializer [opt]
17651 identifier [opt] attributes [opt] : constant-expression
17655 member-declaration:
17656 static_assert-declaration */
17659 cp_parser_member_declaration (cp_parser* parser)
17661 cp_decl_specifier_seq decl_specifiers;
17662 tree prefix_attributes;
17664 int declares_class_or_enum;
17666 cp_token *token = NULL;
17667 cp_token *decl_spec_token_start = NULL;
17668 cp_token *initializer_token_start = NULL;
17669 int saved_pedantic;
17670 bool saved_colon_corrects_to_scope_p = parser->colon_corrects_to_scope_p;
17672 /* Check for the `__extension__' keyword. */
17673 if (cp_parser_extension_opt (parser, &saved_pedantic))
17676 cp_parser_member_declaration (parser);
17677 /* Restore the old value of the PEDANTIC flag. */
17678 pedantic = saved_pedantic;
17683 /* Check for a template-declaration. */
17684 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
17686 /* An explicit specialization here is an error condition, and we
17687 expect the specialization handler to detect and report this. */
17688 if (cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_LESS
17689 && cp_lexer_peek_nth_token (parser->lexer, 3)->type == CPP_GREATER)
17690 cp_parser_explicit_specialization (parser);
17692 cp_parser_template_declaration (parser, /*member_p=*/true);
17697 /* Check for a using-declaration. */
17698 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_USING))
17700 /* Parse the using-declaration. */
17701 cp_parser_using_declaration (parser,
17702 /*access_declaration_p=*/false);
17706 /* Check for @defs. */
17707 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_AT_DEFS))
17710 tree ivar_chains = cp_parser_objc_defs_expression (parser);
17711 ivar = ivar_chains;
17715 ivar = TREE_CHAIN (member);
17716 TREE_CHAIN (member) = NULL_TREE;
17717 finish_member_declaration (member);
17722 /* If the next token is `static_assert' we have a static assertion. */
17723 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_STATIC_ASSERT))
17725 cp_parser_static_assert (parser, /*member_p=*/true);
17729 parser->colon_corrects_to_scope_p = false;
17731 if (cp_parser_using_declaration (parser, /*access_declaration=*/true))
17734 /* Parse the decl-specifier-seq. */
17735 decl_spec_token_start = cp_lexer_peek_token (parser->lexer);
17736 cp_parser_decl_specifier_seq (parser,
17737 CP_PARSER_FLAGS_OPTIONAL,
17739 &declares_class_or_enum);
17740 prefix_attributes = decl_specifiers.attributes;
17741 decl_specifiers.attributes = NULL_TREE;
17742 /* Check for an invalid type-name. */
17743 if (!decl_specifiers.any_type_specifiers_p
17744 && cp_parser_parse_and_diagnose_invalid_type_name (parser))
17746 /* If there is no declarator, then the decl-specifier-seq should
17748 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
17750 /* If there was no decl-specifier-seq, and the next token is a
17751 `;', then we have something like:
17757 Each member-declaration shall declare at least one member
17758 name of the class. */
17759 if (!decl_specifiers.any_specifiers_p)
17761 cp_token *token = cp_lexer_peek_token (parser->lexer);
17762 if (!in_system_header_at (token->location))
17763 pedwarn (token->location, OPT_pedantic, "extra %<;%>");
17769 /* See if this declaration is a friend. */
17770 friend_p = cp_parser_friend_p (&decl_specifiers);
17771 /* If there were decl-specifiers, check to see if there was
17772 a class-declaration. */
17773 type = check_tag_decl (&decl_specifiers);
17774 /* Nested classes have already been added to the class, but
17775 a `friend' needs to be explicitly registered. */
17778 /* If the `friend' keyword was present, the friend must
17779 be introduced with a class-key. */
17780 if (!declares_class_or_enum && cxx_dialect < cxx0x)
17781 pedwarn (decl_spec_token_start->location, OPT_pedantic,
17782 "in C++03 a class-key must be used "
17783 "when declaring a friend");
17786 template <typename T> struct A {
17787 friend struct A<T>::B;
17790 A<T>::B will be represented by a TYPENAME_TYPE, and
17791 therefore not recognized by check_tag_decl. */
17794 type = decl_specifiers.type;
17795 if (type && TREE_CODE (type) == TYPE_DECL)
17796 type = TREE_TYPE (type);
17798 if (!type || !TYPE_P (type))
17799 error_at (decl_spec_token_start->location,
17800 "friend declaration does not name a class or "
17803 make_friend_class (current_class_type, type,
17804 /*complain=*/true);
17806 /* If there is no TYPE, an error message will already have
17808 else if (!type || type == error_mark_node)
17810 /* An anonymous aggregate has to be handled specially; such
17811 a declaration really declares a data member (with a
17812 particular type), as opposed to a nested class. */
17813 else if (ANON_AGGR_TYPE_P (type))
17815 /* Remove constructors and such from TYPE, now that we
17816 know it is an anonymous aggregate. */
17817 fixup_anonymous_aggr (type);
17818 /* And make the corresponding data member. */
17819 decl = build_decl (decl_spec_token_start->location,
17820 FIELD_DECL, NULL_TREE, type);
17821 /* Add it to the class. */
17822 finish_member_declaration (decl);
17825 cp_parser_check_access_in_redeclaration
17827 decl_spec_token_start->location);
17832 bool assume_semicolon = false;
17834 /* See if these declarations will be friends. */
17835 friend_p = cp_parser_friend_p (&decl_specifiers);
17837 /* Keep going until we hit the `;' at the end of the
17839 while (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
17841 tree attributes = NULL_TREE;
17842 tree first_attribute;
17844 /* Peek at the next token. */
17845 token = cp_lexer_peek_token (parser->lexer);
17847 /* Check for a bitfield declaration. */
17848 if (token->type == CPP_COLON
17849 || (token->type == CPP_NAME
17850 && cp_lexer_peek_nth_token (parser->lexer, 2)->type
17856 /* Get the name of the bitfield. Note that we cannot just
17857 check TOKEN here because it may have been invalidated by
17858 the call to cp_lexer_peek_nth_token above. */
17859 if (cp_lexer_peek_token (parser->lexer)->type != CPP_COLON)
17860 identifier = cp_parser_identifier (parser);
17862 identifier = NULL_TREE;
17864 /* Consume the `:' token. */
17865 cp_lexer_consume_token (parser->lexer);
17866 /* Get the width of the bitfield. */
17868 = cp_parser_constant_expression (parser,
17869 /*allow_non_constant=*/false,
17872 /* Look for attributes that apply to the bitfield. */
17873 attributes = cp_parser_attributes_opt (parser);
17874 /* Remember which attributes are prefix attributes and
17876 first_attribute = attributes;
17877 /* Combine the attributes. */
17878 attributes = chainon (prefix_attributes, attributes);
17880 /* Create the bitfield declaration. */
17881 decl = grokbitfield (identifier
17882 ? make_id_declarator (NULL_TREE,
17892 cp_declarator *declarator;
17894 tree asm_specification;
17895 int ctor_dtor_or_conv_p;
17897 /* Parse the declarator. */
17899 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
17900 &ctor_dtor_or_conv_p,
17901 /*parenthesized_p=*/NULL,
17902 /*member_p=*/true);
17904 /* If something went wrong parsing the declarator, make sure
17905 that we at least consume some tokens. */
17906 if (declarator == cp_error_declarator)
17908 /* Skip to the end of the statement. */
17909 cp_parser_skip_to_end_of_statement (parser);
17910 /* If the next token is not a semicolon, that is
17911 probably because we just skipped over the body of
17912 a function. So, we consume a semicolon if
17913 present, but do not issue an error message if it
17915 if (cp_lexer_next_token_is (parser->lexer,
17917 cp_lexer_consume_token (parser->lexer);
17921 if (declares_class_or_enum & 2)
17922 cp_parser_check_for_definition_in_return_type
17923 (declarator, decl_specifiers.type,
17924 decl_specifiers.type_location);
17926 /* Look for an asm-specification. */
17927 asm_specification = cp_parser_asm_specification_opt (parser);
17928 /* Look for attributes that apply to the declaration. */
17929 attributes = cp_parser_attributes_opt (parser);
17930 /* Remember which attributes are prefix attributes and
17932 first_attribute = attributes;
17933 /* Combine the attributes. */
17934 attributes = chainon (prefix_attributes, attributes);
17936 /* If it's an `=', then we have a constant-initializer or a
17937 pure-specifier. It is not correct to parse the
17938 initializer before registering the member declaration
17939 since the member declaration should be in scope while
17940 its initializer is processed. However, the rest of the
17941 front end does not yet provide an interface that allows
17942 us to handle this correctly. */
17943 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
17947 A pure-specifier shall be used only in the declaration of
17948 a virtual function.
17950 A member-declarator can contain a constant-initializer
17951 only if it declares a static member of integral or
17954 Therefore, if the DECLARATOR is for a function, we look
17955 for a pure-specifier; otherwise, we look for a
17956 constant-initializer. When we call `grokfield', it will
17957 perform more stringent semantics checks. */
17958 initializer_token_start = cp_lexer_peek_token (parser->lexer);
17959 if (function_declarator_p (declarator))
17960 initializer = cp_parser_pure_specifier (parser);
17962 /* Parse the initializer. */
17963 initializer = cp_parser_constant_initializer (parser);
17965 /* Otherwise, there is no initializer. */
17967 initializer = NULL_TREE;
17969 /* See if we are probably looking at a function
17970 definition. We are certainly not looking at a
17971 member-declarator. Calling `grokfield' has
17972 side-effects, so we must not do it unless we are sure
17973 that we are looking at a member-declarator. */
17974 if (cp_parser_token_starts_function_definition_p
17975 (cp_lexer_peek_token (parser->lexer)))
17977 /* The grammar does not allow a pure-specifier to be
17978 used when a member function is defined. (It is
17979 possible that this fact is an oversight in the
17980 standard, since a pure function may be defined
17981 outside of the class-specifier. */
17983 error_at (initializer_token_start->location,
17984 "pure-specifier on function-definition");
17985 decl = cp_parser_save_member_function_body (parser,
17989 /* If the member was not a friend, declare it here. */
17991 finish_member_declaration (decl);
17992 /* Peek at the next token. */
17993 token = cp_lexer_peek_token (parser->lexer);
17994 /* If the next token is a semicolon, consume it. */
17995 if (token->type == CPP_SEMICOLON)
17996 cp_lexer_consume_token (parser->lexer);
18000 if (declarator->kind == cdk_function)
18001 declarator->id_loc = token->location;
18002 /* Create the declaration. */
18003 decl = grokfield (declarator, &decl_specifiers,
18004 initializer, /*init_const_expr_p=*/true,
18009 /* Reset PREFIX_ATTRIBUTES. */
18010 while (attributes && TREE_CHAIN (attributes) != first_attribute)
18011 attributes = TREE_CHAIN (attributes);
18013 TREE_CHAIN (attributes) = NULL_TREE;
18015 /* If there is any qualification still in effect, clear it
18016 now; we will be starting fresh with the next declarator. */
18017 parser->scope = NULL_TREE;
18018 parser->qualifying_scope = NULL_TREE;
18019 parser->object_scope = NULL_TREE;
18020 /* If it's a `,', then there are more declarators. */
18021 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
18022 cp_lexer_consume_token (parser->lexer);
18023 /* If the next token isn't a `;', then we have a parse error. */
18024 else if (cp_lexer_next_token_is_not (parser->lexer,
18027 /* The next token might be a ways away from where the
18028 actual semicolon is missing. Find the previous token
18029 and use that for our error position. */
18030 cp_token *token = cp_lexer_previous_token (parser->lexer);
18031 error_at (token->location,
18032 "expected %<;%> at end of member declaration");
18034 /* Assume that the user meant to provide a semicolon. If
18035 we were to cp_parser_skip_to_end_of_statement, we might
18036 skip to a semicolon inside a member function definition
18037 and issue nonsensical error messages. */
18038 assume_semicolon = true;
18043 /* Add DECL to the list of members. */
18045 finish_member_declaration (decl);
18047 if (TREE_CODE (decl) == FUNCTION_DECL)
18048 cp_parser_save_default_args (parser, decl);
18051 if (assume_semicolon)
18056 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
18058 parser->colon_corrects_to_scope_p = saved_colon_corrects_to_scope_p;
18061 /* Parse a pure-specifier.
18066 Returns INTEGER_ZERO_NODE if a pure specifier is found.
18067 Otherwise, ERROR_MARK_NODE is returned. */
18070 cp_parser_pure_specifier (cp_parser* parser)
18074 /* Look for the `=' token. */
18075 if (!cp_parser_require (parser, CPP_EQ, RT_EQ))
18076 return error_mark_node;
18077 /* Look for the `0' token. */
18078 token = cp_lexer_peek_token (parser->lexer);
18080 if (token->type == CPP_EOF
18081 || token->type == CPP_PRAGMA_EOL)
18082 return error_mark_node;
18084 cp_lexer_consume_token (parser->lexer);
18086 /* Accept = default or = delete in c++0x mode. */
18087 if (token->keyword == RID_DEFAULT
18088 || token->keyword == RID_DELETE)
18090 maybe_warn_cpp0x (CPP0X_DEFAULTED_DELETED);
18091 return token->u.value;
18094 /* c_lex_with_flags marks a single digit '0' with PURE_ZERO. */
18095 if (token->type != CPP_NUMBER || !(token->flags & PURE_ZERO))
18097 cp_parser_error (parser,
18098 "invalid pure specifier (only %<= 0%> is allowed)");
18099 cp_parser_skip_to_end_of_statement (parser);
18100 return error_mark_node;
18102 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
18104 error_at (token->location, "templates may not be %<virtual%>");
18105 return error_mark_node;
18108 return integer_zero_node;
18111 /* Parse a constant-initializer.
18113 constant-initializer:
18114 = constant-expression
18116 Returns a representation of the constant-expression. */
18119 cp_parser_constant_initializer (cp_parser* parser)
18121 /* Look for the `=' token. */
18122 if (!cp_parser_require (parser, CPP_EQ, RT_EQ))
18123 return error_mark_node;
18125 /* It is invalid to write:
18127 struct S { static const int i = { 7 }; };
18130 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
18132 cp_parser_error (parser,
18133 "a brace-enclosed initializer is not allowed here");
18134 /* Consume the opening brace. */
18135 cp_lexer_consume_token (parser->lexer);
18136 /* Skip the initializer. */
18137 cp_parser_skip_to_closing_brace (parser);
18138 /* Look for the trailing `}'. */
18139 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
18141 return error_mark_node;
18144 return cp_parser_constant_expression (parser,
18145 /*allow_non_constant=*/false,
18149 /* Derived classes [gram.class.derived] */
18151 /* Parse a base-clause.
18154 : base-specifier-list
18156 base-specifier-list:
18157 base-specifier ... [opt]
18158 base-specifier-list , base-specifier ... [opt]
18160 Returns a TREE_LIST representing the base-classes, in the order in
18161 which they were declared. The representation of each node is as
18162 described by cp_parser_base_specifier.
18164 In the case that no bases are specified, this function will return
18165 NULL_TREE, not ERROR_MARK_NODE. */
18168 cp_parser_base_clause (cp_parser* parser)
18170 tree bases = NULL_TREE;
18172 /* Look for the `:' that begins the list. */
18173 cp_parser_require (parser, CPP_COLON, RT_COLON);
18175 /* Scan the base-specifier-list. */
18180 bool pack_expansion_p = false;
18182 /* Look for the base-specifier. */
18183 base = cp_parser_base_specifier (parser);
18184 /* Look for the (optional) ellipsis. */
18185 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
18187 /* Consume the `...'. */
18188 cp_lexer_consume_token (parser->lexer);
18190 pack_expansion_p = true;
18193 /* Add BASE to the front of the list. */
18194 if (base != error_mark_node)
18196 if (pack_expansion_p)
18197 /* Make this a pack expansion type. */
18198 TREE_VALUE (base) = make_pack_expansion (TREE_VALUE (base));
18201 if (!check_for_bare_parameter_packs (TREE_VALUE (base)))
18203 TREE_CHAIN (base) = bases;
18207 /* Peek at the next token. */
18208 token = cp_lexer_peek_token (parser->lexer);
18209 /* If it's not a comma, then the list is complete. */
18210 if (token->type != CPP_COMMA)
18212 /* Consume the `,'. */
18213 cp_lexer_consume_token (parser->lexer);
18216 /* PARSER->SCOPE may still be non-NULL at this point, if the last
18217 base class had a qualified name. However, the next name that
18218 appears is certainly not qualified. */
18219 parser->scope = NULL_TREE;
18220 parser->qualifying_scope = NULL_TREE;
18221 parser->object_scope = NULL_TREE;
18223 return nreverse (bases);
18226 /* Parse a base-specifier.
18229 :: [opt] nested-name-specifier [opt] class-name
18230 virtual access-specifier [opt] :: [opt] nested-name-specifier
18232 access-specifier virtual [opt] :: [opt] nested-name-specifier
18235 Returns a TREE_LIST. The TREE_PURPOSE will be one of
18236 ACCESS_{DEFAULT,PUBLIC,PROTECTED,PRIVATE}_[VIRTUAL]_NODE to
18237 indicate the specifiers provided. The TREE_VALUE will be a TYPE
18238 (or the ERROR_MARK_NODE) indicating the type that was specified. */
18241 cp_parser_base_specifier (cp_parser* parser)
18245 bool virtual_p = false;
18246 bool duplicate_virtual_error_issued_p = false;
18247 bool duplicate_access_error_issued_p = false;
18248 bool class_scope_p, template_p;
18249 tree access = access_default_node;
18252 /* Process the optional `virtual' and `access-specifier'. */
18255 /* Peek at the next token. */
18256 token = cp_lexer_peek_token (parser->lexer);
18257 /* Process `virtual'. */
18258 switch (token->keyword)
18261 /* If `virtual' appears more than once, issue an error. */
18262 if (virtual_p && !duplicate_virtual_error_issued_p)
18264 cp_parser_error (parser,
18265 "%<virtual%> specified more than once in base-specified");
18266 duplicate_virtual_error_issued_p = true;
18271 /* Consume the `virtual' token. */
18272 cp_lexer_consume_token (parser->lexer);
18277 case RID_PROTECTED:
18279 /* If more than one access specifier appears, issue an
18281 if (access != access_default_node
18282 && !duplicate_access_error_issued_p)
18284 cp_parser_error (parser,
18285 "more than one access specifier in base-specified");
18286 duplicate_access_error_issued_p = true;
18289 access = ridpointers[(int) token->keyword];
18291 /* Consume the access-specifier. */
18292 cp_lexer_consume_token (parser->lexer);
18301 /* It is not uncommon to see programs mechanically, erroneously, use
18302 the 'typename' keyword to denote (dependent) qualified types
18303 as base classes. */
18304 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TYPENAME))
18306 token = cp_lexer_peek_token (parser->lexer);
18307 if (!processing_template_decl)
18308 error_at (token->location,
18309 "keyword %<typename%> not allowed outside of templates");
18311 error_at (token->location,
18312 "keyword %<typename%> not allowed in this context "
18313 "(the base class is implicitly a type)");
18314 cp_lexer_consume_token (parser->lexer);
18317 /* Look for the optional `::' operator. */
18318 cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false);
18319 /* Look for the nested-name-specifier. The simplest way to
18324 The keyword `typename' is not permitted in a base-specifier or
18325 mem-initializer; in these contexts a qualified name that
18326 depends on a template-parameter is implicitly assumed to be a
18329 is to pretend that we have seen the `typename' keyword at this
18331 cp_parser_nested_name_specifier_opt (parser,
18332 /*typename_keyword_p=*/true,
18333 /*check_dependency_p=*/true,
18335 /*is_declaration=*/true);
18336 /* If the base class is given by a qualified name, assume that names
18337 we see are type names or templates, as appropriate. */
18338 class_scope_p = (parser->scope && TYPE_P (parser->scope));
18339 template_p = class_scope_p && cp_parser_optional_template_keyword (parser);
18341 /* Finally, look for the class-name. */
18342 type = cp_parser_class_name (parser,
18346 /*check_dependency_p=*/true,
18347 /*class_head_p=*/false,
18348 /*is_declaration=*/true);
18350 if (type == error_mark_node)
18351 return error_mark_node;
18353 return finish_base_specifier (TREE_TYPE (type), access, virtual_p);
18356 /* Exception handling [gram.exception] */
18358 /* Parse an (optional) exception-specification.
18360 exception-specification:
18361 throw ( type-id-list [opt] )
18363 Returns a TREE_LIST representing the exception-specification. The
18364 TREE_VALUE of each node is a type. */
18367 cp_parser_exception_specification_opt (cp_parser* parser)
18371 const char *saved_message;
18373 /* Peek at the next token. */
18374 token = cp_lexer_peek_token (parser->lexer);
18376 /* Is it a noexcept-specification? */
18377 if (cp_parser_is_keyword (token, RID_NOEXCEPT))
18380 cp_lexer_consume_token (parser->lexer);
18382 if (cp_lexer_peek_token (parser->lexer)->type == CPP_OPEN_PAREN)
18384 cp_lexer_consume_token (parser->lexer);
18386 /* Types may not be defined in an exception-specification. */
18387 saved_message = parser->type_definition_forbidden_message;
18388 parser->type_definition_forbidden_message
18389 = G_("types may not be defined in an exception-specification");
18391 expr = cp_parser_constant_expression (parser, false, NULL);
18393 /* Restore the saved message. */
18394 parser->type_definition_forbidden_message = saved_message;
18396 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
18399 expr = boolean_true_node;
18401 return build_noexcept_spec (expr, tf_warning_or_error);
18404 /* If it's not `throw', then there's no exception-specification. */
18405 if (!cp_parser_is_keyword (token, RID_THROW))
18409 /* Enable this once a lot of code has transitioned to noexcept? */
18410 if (cxx_dialect == cxx0x && !in_system_header)
18411 warning (OPT_Wdeprecated, "dynamic exception specifications are "
18412 "deprecated in C++0x; use %<noexcept%> instead");
18415 /* Consume the `throw'. */
18416 cp_lexer_consume_token (parser->lexer);
18418 /* Look for the `('. */
18419 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
18421 /* Peek at the next token. */
18422 token = cp_lexer_peek_token (parser->lexer);
18423 /* If it's not a `)', then there is a type-id-list. */
18424 if (token->type != CPP_CLOSE_PAREN)
18426 /* Types may not be defined in an exception-specification. */
18427 saved_message = parser->type_definition_forbidden_message;
18428 parser->type_definition_forbidden_message
18429 = G_("types may not be defined in an exception-specification");
18430 /* Parse the type-id-list. */
18431 type_id_list = cp_parser_type_id_list (parser);
18432 /* Restore the saved message. */
18433 parser->type_definition_forbidden_message = saved_message;
18436 type_id_list = empty_except_spec;
18438 /* Look for the `)'. */
18439 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
18441 return type_id_list;
18444 /* Parse an (optional) type-id-list.
18448 type-id-list , type-id ... [opt]
18450 Returns a TREE_LIST. The TREE_VALUE of each node is a TYPE,
18451 in the order that the types were presented. */
18454 cp_parser_type_id_list (cp_parser* parser)
18456 tree types = NULL_TREE;
18463 /* Get the next type-id. */
18464 type = cp_parser_type_id (parser);
18465 /* Parse the optional ellipsis. */
18466 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
18468 /* Consume the `...'. */
18469 cp_lexer_consume_token (parser->lexer);
18471 /* Turn the type into a pack expansion expression. */
18472 type = make_pack_expansion (type);
18474 /* Add it to the list. */
18475 types = add_exception_specifier (types, type, /*complain=*/1);
18476 /* Peek at the next token. */
18477 token = cp_lexer_peek_token (parser->lexer);
18478 /* If it is not a `,', we are done. */
18479 if (token->type != CPP_COMMA)
18481 /* Consume the `,'. */
18482 cp_lexer_consume_token (parser->lexer);
18485 return nreverse (types);
18488 /* Parse a try-block.
18491 try compound-statement handler-seq */
18494 cp_parser_try_block (cp_parser* parser)
18498 cp_parser_require_keyword (parser, RID_TRY, RT_TRY);
18499 try_block = begin_try_block ();
18500 cp_parser_compound_statement (parser, NULL, true, false);
18501 finish_try_block (try_block);
18502 cp_parser_handler_seq (parser);
18503 finish_handler_sequence (try_block);
18508 /* Parse a function-try-block.
18510 function-try-block:
18511 try ctor-initializer [opt] function-body handler-seq */
18514 cp_parser_function_try_block (cp_parser* parser)
18516 tree compound_stmt;
18518 bool ctor_initializer_p;
18520 /* Look for the `try' keyword. */
18521 if (!cp_parser_require_keyword (parser, RID_TRY, RT_TRY))
18523 /* Let the rest of the front end know where we are. */
18524 try_block = begin_function_try_block (&compound_stmt);
18525 /* Parse the function-body. */
18527 = cp_parser_ctor_initializer_opt_and_function_body (parser);
18528 /* We're done with the `try' part. */
18529 finish_function_try_block (try_block);
18530 /* Parse the handlers. */
18531 cp_parser_handler_seq (parser);
18532 /* We're done with the handlers. */
18533 finish_function_handler_sequence (try_block, compound_stmt);
18535 return ctor_initializer_p;
18538 /* Parse a handler-seq.
18541 handler handler-seq [opt] */
18544 cp_parser_handler_seq (cp_parser* parser)
18550 /* Parse the handler. */
18551 cp_parser_handler (parser);
18552 /* Peek at the next token. */
18553 token = cp_lexer_peek_token (parser->lexer);
18554 /* If it's not `catch' then there are no more handlers. */
18555 if (!cp_parser_is_keyword (token, RID_CATCH))
18560 /* Parse a handler.
18563 catch ( exception-declaration ) compound-statement */
18566 cp_parser_handler (cp_parser* parser)
18571 cp_parser_require_keyword (parser, RID_CATCH, RT_CATCH);
18572 handler = begin_handler ();
18573 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
18574 declaration = cp_parser_exception_declaration (parser);
18575 finish_handler_parms (declaration, handler);
18576 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
18577 cp_parser_compound_statement (parser, NULL, false, false);
18578 finish_handler (handler);
18581 /* Parse an exception-declaration.
18583 exception-declaration:
18584 type-specifier-seq declarator
18585 type-specifier-seq abstract-declarator
18589 Returns a VAR_DECL for the declaration, or NULL_TREE if the
18590 ellipsis variant is used. */
18593 cp_parser_exception_declaration (cp_parser* parser)
18595 cp_decl_specifier_seq type_specifiers;
18596 cp_declarator *declarator;
18597 const char *saved_message;
18599 /* If it's an ellipsis, it's easy to handle. */
18600 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
18602 /* Consume the `...' token. */
18603 cp_lexer_consume_token (parser->lexer);
18607 /* Types may not be defined in exception-declarations. */
18608 saved_message = parser->type_definition_forbidden_message;
18609 parser->type_definition_forbidden_message
18610 = G_("types may not be defined in exception-declarations");
18612 /* Parse the type-specifier-seq. */
18613 cp_parser_type_specifier_seq (parser, /*is_declaration=*/true,
18614 /*is_trailing_return=*/false,
18616 /* If it's a `)', then there is no declarator. */
18617 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_PAREN))
18620 declarator = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_EITHER,
18621 /*ctor_dtor_or_conv_p=*/NULL,
18622 /*parenthesized_p=*/NULL,
18623 /*member_p=*/false);
18625 /* Restore the saved message. */
18626 parser->type_definition_forbidden_message = saved_message;
18628 if (!type_specifiers.any_specifiers_p)
18629 return error_mark_node;
18631 return grokdeclarator (declarator, &type_specifiers, CATCHPARM, 1, NULL);
18634 /* Parse a throw-expression.
18637 throw assignment-expression [opt]
18639 Returns a THROW_EXPR representing the throw-expression. */
18642 cp_parser_throw_expression (cp_parser* parser)
18647 cp_parser_require_keyword (parser, RID_THROW, RT_THROW);
18648 token = cp_lexer_peek_token (parser->lexer);
18649 /* Figure out whether or not there is an assignment-expression
18650 following the "throw" keyword. */
18651 if (token->type == CPP_COMMA
18652 || token->type == CPP_SEMICOLON
18653 || token->type == CPP_CLOSE_PAREN
18654 || token->type == CPP_CLOSE_SQUARE
18655 || token->type == CPP_CLOSE_BRACE
18656 || token->type == CPP_COLON)
18657 expression = NULL_TREE;
18659 expression = cp_parser_assignment_expression (parser,
18660 /*cast_p=*/false, NULL);
18662 return build_throw (expression);
18665 /* GNU Extensions */
18667 /* Parse an (optional) asm-specification.
18670 asm ( string-literal )
18672 If the asm-specification is present, returns a STRING_CST
18673 corresponding to the string-literal. Otherwise, returns
18677 cp_parser_asm_specification_opt (cp_parser* parser)
18680 tree asm_specification;
18682 /* Peek at the next token. */
18683 token = cp_lexer_peek_token (parser->lexer);
18684 /* If the next token isn't the `asm' keyword, then there's no
18685 asm-specification. */
18686 if (!cp_parser_is_keyword (token, RID_ASM))
18689 /* Consume the `asm' token. */
18690 cp_lexer_consume_token (parser->lexer);
18691 /* Look for the `('. */
18692 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
18694 /* Look for the string-literal. */
18695 asm_specification = cp_parser_string_literal (parser, false, false);
18697 /* Look for the `)'. */
18698 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
18700 return asm_specification;
18703 /* Parse an asm-operand-list.
18707 asm-operand-list , asm-operand
18710 string-literal ( expression )
18711 [ string-literal ] string-literal ( expression )
18713 Returns a TREE_LIST representing the operands. The TREE_VALUE of
18714 each node is the expression. The TREE_PURPOSE is itself a
18715 TREE_LIST whose TREE_PURPOSE is a STRING_CST for the bracketed
18716 string-literal (or NULL_TREE if not present) and whose TREE_VALUE
18717 is a STRING_CST for the string literal before the parenthesis. Returns
18718 ERROR_MARK_NODE if any of the operands are invalid. */
18721 cp_parser_asm_operand_list (cp_parser* parser)
18723 tree asm_operands = NULL_TREE;
18724 bool invalid_operands = false;
18728 tree string_literal;
18732 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
18734 /* Consume the `[' token. */
18735 cp_lexer_consume_token (parser->lexer);
18736 /* Read the operand name. */
18737 name = cp_parser_identifier (parser);
18738 if (name != error_mark_node)
18739 name = build_string (IDENTIFIER_LENGTH (name),
18740 IDENTIFIER_POINTER (name));
18741 /* Look for the closing `]'. */
18742 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
18746 /* Look for the string-literal. */
18747 string_literal = cp_parser_string_literal (parser, false, false);
18749 /* Look for the `('. */
18750 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
18751 /* Parse the expression. */
18752 expression = cp_parser_expression (parser, /*cast_p=*/false, NULL);
18753 /* Look for the `)'. */
18754 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
18756 if (name == error_mark_node
18757 || string_literal == error_mark_node
18758 || expression == error_mark_node)
18759 invalid_operands = true;
18761 /* Add this operand to the list. */
18762 asm_operands = tree_cons (build_tree_list (name, string_literal),
18765 /* If the next token is not a `,', there are no more
18767 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
18769 /* Consume the `,'. */
18770 cp_lexer_consume_token (parser->lexer);
18773 return invalid_operands ? error_mark_node : nreverse (asm_operands);
18776 /* Parse an asm-clobber-list.
18780 asm-clobber-list , string-literal
18782 Returns a TREE_LIST, indicating the clobbers in the order that they
18783 appeared. The TREE_VALUE of each node is a STRING_CST. */
18786 cp_parser_asm_clobber_list (cp_parser* parser)
18788 tree clobbers = NULL_TREE;
18792 tree string_literal;
18794 /* Look for the string literal. */
18795 string_literal = cp_parser_string_literal (parser, false, false);
18796 /* Add it to the list. */
18797 clobbers = tree_cons (NULL_TREE, string_literal, clobbers);
18798 /* If the next token is not a `,', then the list is
18800 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
18802 /* Consume the `,' token. */
18803 cp_lexer_consume_token (parser->lexer);
18809 /* Parse an asm-label-list.
18813 asm-label-list , identifier
18815 Returns a TREE_LIST, indicating the labels in the order that they
18816 appeared. The TREE_VALUE of each node is a label. */
18819 cp_parser_asm_label_list (cp_parser* parser)
18821 tree labels = NULL_TREE;
18825 tree identifier, label, name;
18827 /* Look for the identifier. */
18828 identifier = cp_parser_identifier (parser);
18829 if (!error_operand_p (identifier))
18831 label = lookup_label (identifier);
18832 if (TREE_CODE (label) == LABEL_DECL)
18834 TREE_USED (label) = 1;
18835 check_goto (label);
18836 name = build_string (IDENTIFIER_LENGTH (identifier),
18837 IDENTIFIER_POINTER (identifier));
18838 labels = tree_cons (name, label, labels);
18841 /* If the next token is not a `,', then the list is
18843 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
18845 /* Consume the `,' token. */
18846 cp_lexer_consume_token (parser->lexer);
18849 return nreverse (labels);
18852 /* Parse an (optional) series of attributes.
18855 attributes attribute
18858 __attribute__ (( attribute-list [opt] ))
18860 The return value is as for cp_parser_attribute_list. */
18863 cp_parser_attributes_opt (cp_parser* parser)
18865 tree attributes = NULL_TREE;
18870 tree attribute_list;
18872 /* Peek at the next token. */
18873 token = cp_lexer_peek_token (parser->lexer);
18874 /* If it's not `__attribute__', then we're done. */
18875 if (token->keyword != RID_ATTRIBUTE)
18878 /* Consume the `__attribute__' keyword. */
18879 cp_lexer_consume_token (parser->lexer);
18880 /* Look for the two `(' tokens. */
18881 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
18882 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
18884 /* Peek at the next token. */
18885 token = cp_lexer_peek_token (parser->lexer);
18886 if (token->type != CPP_CLOSE_PAREN)
18887 /* Parse the attribute-list. */
18888 attribute_list = cp_parser_attribute_list (parser);
18890 /* If the next token is a `)', then there is no attribute
18892 attribute_list = NULL;
18894 /* Look for the two `)' tokens. */
18895 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
18896 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
18898 /* Add these new attributes to the list. */
18899 attributes = chainon (attributes, attribute_list);
18905 /* Parse an attribute-list.
18909 attribute-list , attribute
18913 identifier ( identifier )
18914 identifier ( identifier , expression-list )
18915 identifier ( expression-list )
18917 Returns a TREE_LIST, or NULL_TREE on error. Each node corresponds
18918 to an attribute. The TREE_PURPOSE of each node is the identifier
18919 indicating which attribute is in use. The TREE_VALUE represents
18920 the arguments, if any. */
18923 cp_parser_attribute_list (cp_parser* parser)
18925 tree attribute_list = NULL_TREE;
18926 bool save_translate_strings_p = parser->translate_strings_p;
18928 parser->translate_strings_p = false;
18935 /* Look for the identifier. We also allow keywords here; for
18936 example `__attribute__ ((const))' is legal. */
18937 token = cp_lexer_peek_token (parser->lexer);
18938 if (token->type == CPP_NAME
18939 || token->type == CPP_KEYWORD)
18941 tree arguments = NULL_TREE;
18943 /* Consume the token. */
18944 token = cp_lexer_consume_token (parser->lexer);
18946 /* Save away the identifier that indicates which attribute
18948 identifier = (token->type == CPP_KEYWORD)
18949 /* For keywords, use the canonical spelling, not the
18950 parsed identifier. */
18951 ? ridpointers[(int) token->keyword]
18954 attribute = build_tree_list (identifier, NULL_TREE);
18956 /* Peek at the next token. */
18957 token = cp_lexer_peek_token (parser->lexer);
18958 /* If it's an `(', then parse the attribute arguments. */
18959 if (token->type == CPP_OPEN_PAREN)
18962 int attr_flag = (attribute_takes_identifier_p (identifier)
18963 ? id_attr : normal_attr);
18964 vec = cp_parser_parenthesized_expression_list
18965 (parser, attr_flag, /*cast_p=*/false,
18966 /*allow_expansion_p=*/false,
18967 /*non_constant_p=*/NULL);
18969 arguments = error_mark_node;
18972 arguments = build_tree_list_vec (vec);
18973 release_tree_vector (vec);
18975 /* Save the arguments away. */
18976 TREE_VALUE (attribute) = arguments;
18979 if (arguments != error_mark_node)
18981 /* Add this attribute to the list. */
18982 TREE_CHAIN (attribute) = attribute_list;
18983 attribute_list = attribute;
18986 token = cp_lexer_peek_token (parser->lexer);
18988 /* Now, look for more attributes. If the next token isn't a
18989 `,', we're done. */
18990 if (token->type != CPP_COMMA)
18993 /* Consume the comma and keep going. */
18994 cp_lexer_consume_token (parser->lexer);
18996 parser->translate_strings_p = save_translate_strings_p;
18998 /* We built up the list in reverse order. */
18999 return nreverse (attribute_list);
19002 /* Parse an optional `__extension__' keyword. Returns TRUE if it is
19003 present, and FALSE otherwise. *SAVED_PEDANTIC is set to the
19004 current value of the PEDANTIC flag, regardless of whether or not
19005 the `__extension__' keyword is present. The caller is responsible
19006 for restoring the value of the PEDANTIC flag. */
19009 cp_parser_extension_opt (cp_parser* parser, int* saved_pedantic)
19011 /* Save the old value of the PEDANTIC flag. */
19012 *saved_pedantic = pedantic;
19014 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_EXTENSION))
19016 /* Consume the `__extension__' token. */
19017 cp_lexer_consume_token (parser->lexer);
19018 /* We're not being pedantic while the `__extension__' keyword is
19028 /* Parse a label declaration.
19031 __label__ label-declarator-seq ;
19033 label-declarator-seq:
19034 identifier , label-declarator-seq
19038 cp_parser_label_declaration (cp_parser* parser)
19040 /* Look for the `__label__' keyword. */
19041 cp_parser_require_keyword (parser, RID_LABEL, RT_LABEL);
19047 /* Look for an identifier. */
19048 identifier = cp_parser_identifier (parser);
19049 /* If we failed, stop. */
19050 if (identifier == error_mark_node)
19052 /* Declare it as a label. */
19053 finish_label_decl (identifier);
19054 /* If the next token is a `;', stop. */
19055 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
19057 /* Look for the `,' separating the label declarations. */
19058 cp_parser_require (parser, CPP_COMMA, RT_COMMA);
19061 /* Look for the final `;'. */
19062 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
19065 /* Support Functions */
19067 /* Looks up NAME in the current scope, as given by PARSER->SCOPE.
19068 NAME should have one of the representations used for an
19069 id-expression. If NAME is the ERROR_MARK_NODE, the ERROR_MARK_NODE
19070 is returned. If PARSER->SCOPE is a dependent type, then a
19071 SCOPE_REF is returned.
19073 If NAME is a TEMPLATE_ID_EXPR, then it will be immediately
19074 returned; the name was already resolved when the TEMPLATE_ID_EXPR
19075 was formed. Abstractly, such entities should not be passed to this
19076 function, because they do not need to be looked up, but it is
19077 simpler to check for this special case here, rather than at the
19080 In cases not explicitly covered above, this function returns a
19081 DECL, OVERLOAD, or baselink representing the result of the lookup.
19082 If there was no entity with the indicated NAME, the ERROR_MARK_NODE
19085 If TAG_TYPE is not NONE_TYPE, it indicates an explicit type keyword
19086 (e.g., "struct") that was used. In that case bindings that do not
19087 refer to types are ignored.
19089 If IS_TEMPLATE is TRUE, bindings that do not refer to templates are
19092 If IS_NAMESPACE is TRUE, bindings that do not refer to namespaces
19095 If CHECK_DEPENDENCY is TRUE, names are not looked up in dependent
19098 If AMBIGUOUS_DECLS is non-NULL, *AMBIGUOUS_DECLS is set to a
19099 TREE_LIST of candidates if name-lookup results in an ambiguity, and
19100 NULL_TREE otherwise. */
19103 cp_parser_lookup_name (cp_parser *parser, tree name,
19104 enum tag_types tag_type,
19107 bool check_dependency,
19108 tree *ambiguous_decls,
19109 location_t name_location)
19113 tree object_type = parser->context->object_type;
19115 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
19116 flags |= LOOKUP_COMPLAIN;
19118 /* Assume that the lookup will be unambiguous. */
19119 if (ambiguous_decls)
19120 *ambiguous_decls = NULL_TREE;
19122 /* Now that we have looked up the name, the OBJECT_TYPE (if any) is
19123 no longer valid. Note that if we are parsing tentatively, and
19124 the parse fails, OBJECT_TYPE will be automatically restored. */
19125 parser->context->object_type = NULL_TREE;
19127 if (name == error_mark_node)
19128 return error_mark_node;
19130 /* A template-id has already been resolved; there is no lookup to
19132 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
19134 if (BASELINK_P (name))
19136 gcc_assert (TREE_CODE (BASELINK_FUNCTIONS (name))
19137 == TEMPLATE_ID_EXPR);
19141 /* A BIT_NOT_EXPR is used to represent a destructor. By this point,
19142 it should already have been checked to make sure that the name
19143 used matches the type being destroyed. */
19144 if (TREE_CODE (name) == BIT_NOT_EXPR)
19148 /* Figure out to which type this destructor applies. */
19150 type = parser->scope;
19151 else if (object_type)
19152 type = object_type;
19154 type = current_class_type;
19155 /* If that's not a class type, there is no destructor. */
19156 if (!type || !CLASS_TYPE_P (type))
19157 return error_mark_node;
19158 if (CLASSTYPE_LAZY_DESTRUCTOR (type))
19159 lazily_declare_fn (sfk_destructor, type);
19160 if (!CLASSTYPE_DESTRUCTORS (type))
19161 return error_mark_node;
19162 /* If it was a class type, return the destructor. */
19163 return CLASSTYPE_DESTRUCTORS (type);
19166 /* By this point, the NAME should be an ordinary identifier. If
19167 the id-expression was a qualified name, the qualifying scope is
19168 stored in PARSER->SCOPE at this point. */
19169 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
19171 /* Perform the lookup. */
19176 if (parser->scope == error_mark_node)
19177 return error_mark_node;
19179 /* If the SCOPE is dependent, the lookup must be deferred until
19180 the template is instantiated -- unless we are explicitly
19181 looking up names in uninstantiated templates. Even then, we
19182 cannot look up the name if the scope is not a class type; it
19183 might, for example, be a template type parameter. */
19184 dependent_p = (TYPE_P (parser->scope)
19185 && dependent_scope_p (parser->scope));
19186 if ((check_dependency || !CLASS_TYPE_P (parser->scope))
19188 /* Defer lookup. */
19189 decl = error_mark_node;
19192 tree pushed_scope = NULL_TREE;
19194 /* If PARSER->SCOPE is a dependent type, then it must be a
19195 class type, and we must not be checking dependencies;
19196 otherwise, we would have processed this lookup above. So
19197 that PARSER->SCOPE is not considered a dependent base by
19198 lookup_member, we must enter the scope here. */
19200 pushed_scope = push_scope (parser->scope);
19202 /* If the PARSER->SCOPE is a template specialization, it
19203 may be instantiated during name lookup. In that case,
19204 errors may be issued. Even if we rollback the current
19205 tentative parse, those errors are valid. */
19206 decl = lookup_qualified_name (parser->scope, name,
19207 tag_type != none_type,
19208 /*complain=*/true);
19210 /* 3.4.3.1: In a lookup in which the constructor is an acceptable
19211 lookup result and the nested-name-specifier nominates a class C:
19212 * if the name specified after the nested-name-specifier, when
19213 looked up in C, is the injected-class-name of C (Clause 9), or
19214 * if the name specified after the nested-name-specifier is the
19215 same as the identifier or the simple-template-id's template-
19216 name in the last component of the nested-name-specifier,
19217 the name is instead considered to name the constructor of
19218 class C. [ Note: for example, the constructor is not an
19219 acceptable lookup result in an elaborated-type-specifier so
19220 the constructor would not be used in place of the
19221 injected-class-name. --end note ] Such a constructor name
19222 shall be used only in the declarator-id of a declaration that
19223 names a constructor or in a using-declaration. */
19224 if (tag_type == none_type
19225 && DECL_SELF_REFERENCE_P (decl)
19226 && same_type_p (DECL_CONTEXT (decl), parser->scope))
19227 decl = lookup_qualified_name (parser->scope, ctor_identifier,
19228 tag_type != none_type,
19229 /*complain=*/true);
19231 /* If we have a single function from a using decl, pull it out. */
19232 if (TREE_CODE (decl) == OVERLOAD
19233 && !really_overloaded_fn (decl))
19234 decl = OVL_FUNCTION (decl);
19237 pop_scope (pushed_scope);
19240 /* If the scope is a dependent type and either we deferred lookup or
19241 we did lookup but didn't find the name, rememeber the name. */
19242 if (decl == error_mark_node && TYPE_P (parser->scope)
19243 && dependent_type_p (parser->scope))
19249 /* The resolution to Core Issue 180 says that `struct
19250 A::B' should be considered a type-name, even if `A'
19252 type = make_typename_type (parser->scope, name, tag_type,
19253 /*complain=*/tf_error);
19254 decl = TYPE_NAME (type);
19256 else if (is_template
19257 && (cp_parser_next_token_ends_template_argument_p (parser)
19258 || cp_lexer_next_token_is (parser->lexer,
19260 decl = make_unbound_class_template (parser->scope,
19262 /*complain=*/tf_error);
19264 decl = build_qualified_name (/*type=*/NULL_TREE,
19265 parser->scope, name,
19268 parser->qualifying_scope = parser->scope;
19269 parser->object_scope = NULL_TREE;
19271 else if (object_type)
19273 tree object_decl = NULL_TREE;
19274 /* Look up the name in the scope of the OBJECT_TYPE, unless the
19275 OBJECT_TYPE is not a class. */
19276 if (CLASS_TYPE_P (object_type))
19277 /* If the OBJECT_TYPE is a template specialization, it may
19278 be instantiated during name lookup. In that case, errors
19279 may be issued. Even if we rollback the current tentative
19280 parse, those errors are valid. */
19281 object_decl = lookup_member (object_type,
19284 tag_type != none_type);
19285 /* Look it up in the enclosing context, too. */
19286 decl = lookup_name_real (name, tag_type != none_type,
19288 /*block_p=*/true, is_namespace, flags);
19289 parser->object_scope = object_type;
19290 parser->qualifying_scope = NULL_TREE;
19292 decl = object_decl;
19296 decl = lookup_name_real (name, tag_type != none_type,
19298 /*block_p=*/true, is_namespace, flags);
19299 parser->qualifying_scope = NULL_TREE;
19300 parser->object_scope = NULL_TREE;
19303 /* If the lookup failed, let our caller know. */
19304 if (!decl || decl == error_mark_node)
19305 return error_mark_node;
19307 /* Pull out the template from an injected-class-name (or multiple). */
19309 decl = maybe_get_template_decl_from_type_decl (decl);
19311 /* If it's a TREE_LIST, the result of the lookup was ambiguous. */
19312 if (TREE_CODE (decl) == TREE_LIST)
19314 if (ambiguous_decls)
19315 *ambiguous_decls = decl;
19316 /* The error message we have to print is too complicated for
19317 cp_parser_error, so we incorporate its actions directly. */
19318 if (!cp_parser_simulate_error (parser))
19320 error_at (name_location, "reference to %qD is ambiguous",
19322 print_candidates (decl);
19324 return error_mark_node;
19327 gcc_assert (DECL_P (decl)
19328 || TREE_CODE (decl) == OVERLOAD
19329 || TREE_CODE (decl) == SCOPE_REF
19330 || TREE_CODE (decl) == UNBOUND_CLASS_TEMPLATE
19331 || BASELINK_P (decl));
19333 /* If we have resolved the name of a member declaration, check to
19334 see if the declaration is accessible. When the name resolves to
19335 set of overloaded functions, accessibility is checked when
19336 overload resolution is done.
19338 During an explicit instantiation, access is not checked at all,
19339 as per [temp.explicit]. */
19341 check_accessibility_of_qualified_id (decl, object_type, parser->scope);
19346 /* Like cp_parser_lookup_name, but for use in the typical case where
19347 CHECK_ACCESS is TRUE, IS_TYPE is FALSE, IS_TEMPLATE is FALSE,
19348 IS_NAMESPACE is FALSE, and CHECK_DEPENDENCY is TRUE. */
19351 cp_parser_lookup_name_simple (cp_parser* parser, tree name, location_t location)
19353 return cp_parser_lookup_name (parser, name,
19355 /*is_template=*/false,
19356 /*is_namespace=*/false,
19357 /*check_dependency=*/true,
19358 /*ambiguous_decls=*/NULL,
19362 /* If DECL is a TEMPLATE_DECL that can be treated like a TYPE_DECL in
19363 the current context, return the TYPE_DECL. If TAG_NAME_P is
19364 true, the DECL indicates the class being defined in a class-head,
19365 or declared in an elaborated-type-specifier.
19367 Otherwise, return DECL. */
19370 cp_parser_maybe_treat_template_as_class (tree decl, bool tag_name_p)
19372 /* If the TEMPLATE_DECL is being declared as part of a class-head,
19373 the translation from TEMPLATE_DECL to TYPE_DECL occurs:
19376 template <typename T> struct B;
19379 template <typename T> struct A::B {};
19381 Similarly, in an elaborated-type-specifier:
19383 namespace N { struct X{}; }
19386 template <typename T> friend struct N::X;
19389 However, if the DECL refers to a class type, and we are in
19390 the scope of the class, then the name lookup automatically
19391 finds the TYPE_DECL created by build_self_reference rather
19392 than a TEMPLATE_DECL. For example, in:
19394 template <class T> struct S {
19398 there is no need to handle such case. */
19400 if (DECL_CLASS_TEMPLATE_P (decl) && tag_name_p)
19401 return DECL_TEMPLATE_RESULT (decl);
19406 /* If too many, or too few, template-parameter lists apply to the
19407 declarator, issue an error message. Returns TRUE if all went well,
19408 and FALSE otherwise. */
19411 cp_parser_check_declarator_template_parameters (cp_parser* parser,
19412 cp_declarator *declarator,
19413 location_t declarator_location)
19415 unsigned num_templates;
19417 /* We haven't seen any classes that involve template parameters yet. */
19420 switch (declarator->kind)
19423 if (declarator->u.id.qualifying_scope)
19427 scope = declarator->u.id.qualifying_scope;
19429 while (scope && CLASS_TYPE_P (scope))
19431 /* You're supposed to have one `template <...>'
19432 for every template class, but you don't need one
19433 for a full specialization. For example:
19435 template <class T> struct S{};
19436 template <> struct S<int> { void f(); };
19437 void S<int>::f () {}
19439 is correct; there shouldn't be a `template <>' for
19440 the definition of `S<int>::f'. */
19441 if (!CLASSTYPE_TEMPLATE_INFO (scope))
19442 /* If SCOPE does not have template information of any
19443 kind, then it is not a template, nor is it nested
19444 within a template. */
19446 if (explicit_class_specialization_p (scope))
19448 if (PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (scope)))
19451 scope = TYPE_CONTEXT (scope);
19454 else if (TREE_CODE (declarator->u.id.unqualified_name)
19455 == TEMPLATE_ID_EXPR)
19456 /* If the DECLARATOR has the form `X<y>' then it uses one
19457 additional level of template parameters. */
19460 return cp_parser_check_template_parameters
19461 (parser, num_templates, declarator_location, declarator);
19467 case cdk_reference:
19469 return (cp_parser_check_declarator_template_parameters
19470 (parser, declarator->declarator, declarator_location));
19476 gcc_unreachable ();
19481 /* NUM_TEMPLATES were used in the current declaration. If that is
19482 invalid, return FALSE and issue an error messages. Otherwise,
19483 return TRUE. If DECLARATOR is non-NULL, then we are checking a
19484 declarator and we can print more accurate diagnostics. */
19487 cp_parser_check_template_parameters (cp_parser* parser,
19488 unsigned num_templates,
19489 location_t location,
19490 cp_declarator *declarator)
19492 /* If there are the same number of template classes and parameter
19493 lists, that's OK. */
19494 if (parser->num_template_parameter_lists == num_templates)
19496 /* If there are more, but only one more, then we are referring to a
19497 member template. That's OK too. */
19498 if (parser->num_template_parameter_lists == num_templates + 1)
19500 /* If there are more template classes than parameter lists, we have
19503 template <class T> void S<T>::R<T>::f (); */
19504 if (parser->num_template_parameter_lists < num_templates)
19506 if (declarator && !current_function_decl)
19507 error_at (location, "specializing member %<%T::%E%> "
19508 "requires %<template<>%> syntax",
19509 declarator->u.id.qualifying_scope,
19510 declarator->u.id.unqualified_name);
19511 else if (declarator)
19512 error_at (location, "invalid declaration of %<%T::%E%>",
19513 declarator->u.id.qualifying_scope,
19514 declarator->u.id.unqualified_name);
19516 error_at (location, "too few template-parameter-lists");
19519 /* Otherwise, there are too many template parameter lists. We have
19522 template <class T> template <class U> void S::f(); */
19523 error_at (location, "too many template-parameter-lists");
19527 /* Parse an optional `::' token indicating that the following name is
19528 from the global namespace. If so, PARSER->SCOPE is set to the
19529 GLOBAL_NAMESPACE. Otherwise, PARSER->SCOPE is set to NULL_TREE,
19530 unless CURRENT_SCOPE_VALID_P is TRUE, in which case it is left alone.
19531 Returns the new value of PARSER->SCOPE, if the `::' token is
19532 present, and NULL_TREE otherwise. */
19535 cp_parser_global_scope_opt (cp_parser* parser, bool current_scope_valid_p)
19539 /* Peek at the next token. */
19540 token = cp_lexer_peek_token (parser->lexer);
19541 /* If we're looking at a `::' token then we're starting from the
19542 global namespace, not our current location. */
19543 if (token->type == CPP_SCOPE)
19545 /* Consume the `::' token. */
19546 cp_lexer_consume_token (parser->lexer);
19547 /* Set the SCOPE so that we know where to start the lookup. */
19548 parser->scope = global_namespace;
19549 parser->qualifying_scope = global_namespace;
19550 parser->object_scope = NULL_TREE;
19552 return parser->scope;
19554 else if (!current_scope_valid_p)
19556 parser->scope = NULL_TREE;
19557 parser->qualifying_scope = NULL_TREE;
19558 parser->object_scope = NULL_TREE;
19564 /* Returns TRUE if the upcoming token sequence is the start of a
19565 constructor declarator. If FRIEND_P is true, the declarator is
19566 preceded by the `friend' specifier. */
19569 cp_parser_constructor_declarator_p (cp_parser *parser, bool friend_p)
19571 bool constructor_p;
19572 tree nested_name_specifier;
19573 cp_token *next_token;
19575 /* The common case is that this is not a constructor declarator, so
19576 try to avoid doing lots of work if at all possible. It's not
19577 valid declare a constructor at function scope. */
19578 if (parser->in_function_body)
19580 /* And only certain tokens can begin a constructor declarator. */
19581 next_token = cp_lexer_peek_token (parser->lexer);
19582 if (next_token->type != CPP_NAME
19583 && next_token->type != CPP_SCOPE
19584 && next_token->type != CPP_NESTED_NAME_SPECIFIER
19585 && next_token->type != CPP_TEMPLATE_ID)
19588 /* Parse tentatively; we are going to roll back all of the tokens
19590 cp_parser_parse_tentatively (parser);
19591 /* Assume that we are looking at a constructor declarator. */
19592 constructor_p = true;
19594 /* Look for the optional `::' operator. */
19595 cp_parser_global_scope_opt (parser,
19596 /*current_scope_valid_p=*/false);
19597 /* Look for the nested-name-specifier. */
19598 nested_name_specifier
19599 = (cp_parser_nested_name_specifier_opt (parser,
19600 /*typename_keyword_p=*/false,
19601 /*check_dependency_p=*/false,
19603 /*is_declaration=*/false));
19604 /* Outside of a class-specifier, there must be a
19605 nested-name-specifier. */
19606 if (!nested_name_specifier &&
19607 (!at_class_scope_p () || !TYPE_BEING_DEFINED (current_class_type)
19609 constructor_p = false;
19610 else if (nested_name_specifier == error_mark_node)
19611 constructor_p = false;
19613 /* If we have a class scope, this is easy; DR 147 says that S::S always
19614 names the constructor, and no other qualified name could. */
19615 if (constructor_p && nested_name_specifier
19616 && CLASS_TYPE_P (nested_name_specifier))
19618 tree id = cp_parser_unqualified_id (parser,
19619 /*template_keyword_p=*/false,
19620 /*check_dependency_p=*/false,
19621 /*declarator_p=*/true,
19622 /*optional_p=*/false);
19623 if (is_overloaded_fn (id))
19624 id = DECL_NAME (get_first_fn (id));
19625 if (!constructor_name_p (id, nested_name_specifier))
19626 constructor_p = false;
19628 /* If we still think that this might be a constructor-declarator,
19629 look for a class-name. */
19630 else if (constructor_p)
19634 template <typename T> struct S {
19638 we must recognize that the nested `S' names a class. */
19640 type_decl = cp_parser_class_name (parser,
19641 /*typename_keyword_p=*/false,
19642 /*template_keyword_p=*/false,
19644 /*check_dependency_p=*/false,
19645 /*class_head_p=*/false,
19646 /*is_declaration=*/false);
19647 /* If there was no class-name, then this is not a constructor. */
19648 constructor_p = !cp_parser_error_occurred (parser);
19650 /* If we're still considering a constructor, we have to see a `(',
19651 to begin the parameter-declaration-clause, followed by either a
19652 `)', an `...', or a decl-specifier. We need to check for a
19653 type-specifier to avoid being fooled into thinking that:
19657 is a constructor. (It is actually a function named `f' that
19658 takes one parameter (of type `int') and returns a value of type
19661 && !cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
19662 constructor_p = false;
19665 && cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN)
19666 && cp_lexer_next_token_is_not (parser->lexer, CPP_ELLIPSIS)
19667 /* A parameter declaration begins with a decl-specifier,
19668 which is either the "attribute" keyword, a storage class
19669 specifier, or (usually) a type-specifier. */
19670 && !cp_lexer_next_token_is_decl_specifier_keyword (parser->lexer))
19673 tree pushed_scope = NULL_TREE;
19674 unsigned saved_num_template_parameter_lists;
19676 /* Names appearing in the type-specifier should be looked up
19677 in the scope of the class. */
19678 if (current_class_type)
19682 type = TREE_TYPE (type_decl);
19683 if (TREE_CODE (type) == TYPENAME_TYPE)
19685 type = resolve_typename_type (type,
19686 /*only_current_p=*/false);
19687 if (TREE_CODE (type) == TYPENAME_TYPE)
19689 cp_parser_abort_tentative_parse (parser);
19693 pushed_scope = push_scope (type);
19696 /* Inside the constructor parameter list, surrounding
19697 template-parameter-lists do not apply. */
19698 saved_num_template_parameter_lists
19699 = parser->num_template_parameter_lists;
19700 parser->num_template_parameter_lists = 0;
19702 /* Look for the type-specifier. */
19703 cp_parser_type_specifier (parser,
19704 CP_PARSER_FLAGS_NONE,
19705 /*decl_specs=*/NULL,
19706 /*is_declarator=*/true,
19707 /*declares_class_or_enum=*/NULL,
19708 /*is_cv_qualifier=*/NULL);
19710 parser->num_template_parameter_lists
19711 = saved_num_template_parameter_lists;
19713 /* Leave the scope of the class. */
19715 pop_scope (pushed_scope);
19717 constructor_p = !cp_parser_error_occurred (parser);
19721 /* We did not really want to consume any tokens. */
19722 cp_parser_abort_tentative_parse (parser);
19724 return constructor_p;
19727 /* Parse the definition of the function given by the DECL_SPECIFIERS,
19728 ATTRIBUTES, and DECLARATOR. The access checks have been deferred;
19729 they must be performed once we are in the scope of the function.
19731 Returns the function defined. */
19734 cp_parser_function_definition_from_specifiers_and_declarator
19735 (cp_parser* parser,
19736 cp_decl_specifier_seq *decl_specifiers,
19738 const cp_declarator *declarator)
19743 /* Begin the function-definition. */
19744 success_p = start_function (decl_specifiers, declarator, attributes);
19746 /* The things we're about to see are not directly qualified by any
19747 template headers we've seen thus far. */
19748 reset_specialization ();
19750 /* If there were names looked up in the decl-specifier-seq that we
19751 did not check, check them now. We must wait until we are in the
19752 scope of the function to perform the checks, since the function
19753 might be a friend. */
19754 perform_deferred_access_checks ();
19758 /* Skip the entire function. */
19759 cp_parser_skip_to_end_of_block_or_statement (parser);
19760 fn = error_mark_node;
19762 else if (DECL_INITIAL (current_function_decl) != error_mark_node)
19764 /* Seen already, skip it. An error message has already been output. */
19765 cp_parser_skip_to_end_of_block_or_statement (parser);
19766 fn = current_function_decl;
19767 current_function_decl = NULL_TREE;
19768 /* If this is a function from a class, pop the nested class. */
19769 if (current_class_name)
19770 pop_nested_class ();
19775 if (DECL_DECLARED_INLINE_P (current_function_decl))
19776 tv = TV_PARSE_INLINE;
19778 tv = TV_PARSE_FUNC;
19780 fn = cp_parser_function_definition_after_declarator (parser,
19781 /*inline_p=*/false);
19788 /* Parse the part of a function-definition that follows the
19789 declarator. INLINE_P is TRUE iff this function is an inline
19790 function defined within a class-specifier.
19792 Returns the function defined. */
19795 cp_parser_function_definition_after_declarator (cp_parser* parser,
19799 bool ctor_initializer_p = false;
19800 bool saved_in_unbraced_linkage_specification_p;
19801 bool saved_in_function_body;
19802 unsigned saved_num_template_parameter_lists;
19805 saved_in_function_body = parser->in_function_body;
19806 parser->in_function_body = true;
19807 /* If the next token is `return', then the code may be trying to
19808 make use of the "named return value" extension that G++ used to
19810 token = cp_lexer_peek_token (parser->lexer);
19811 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_RETURN))
19813 /* Consume the `return' keyword. */
19814 cp_lexer_consume_token (parser->lexer);
19815 /* Look for the identifier that indicates what value is to be
19817 cp_parser_identifier (parser);
19818 /* Issue an error message. */
19819 error_at (token->location,
19820 "named return values are no longer supported");
19821 /* Skip tokens until we reach the start of the function body. */
19824 cp_token *token = cp_lexer_peek_token (parser->lexer);
19825 if (token->type == CPP_OPEN_BRACE
19826 || token->type == CPP_EOF
19827 || token->type == CPP_PRAGMA_EOL)
19829 cp_lexer_consume_token (parser->lexer);
19832 /* The `extern' in `extern "C" void f () { ... }' does not apply to
19833 anything declared inside `f'. */
19834 saved_in_unbraced_linkage_specification_p
19835 = parser->in_unbraced_linkage_specification_p;
19836 parser->in_unbraced_linkage_specification_p = false;
19837 /* Inside the function, surrounding template-parameter-lists do not
19839 saved_num_template_parameter_lists
19840 = parser->num_template_parameter_lists;
19841 parser->num_template_parameter_lists = 0;
19843 start_lambda_scope (current_function_decl);
19845 /* If the next token is `try', then we are looking at a
19846 function-try-block. */
19847 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TRY))
19848 ctor_initializer_p = cp_parser_function_try_block (parser);
19849 /* A function-try-block includes the function-body, so we only do
19850 this next part if we're not processing a function-try-block. */
19853 = cp_parser_ctor_initializer_opt_and_function_body (parser);
19855 finish_lambda_scope ();
19857 /* Finish the function. */
19858 fn = finish_function ((ctor_initializer_p ? 1 : 0) |
19859 (inline_p ? 2 : 0));
19860 /* Generate code for it, if necessary. */
19861 expand_or_defer_fn (fn);
19862 /* Restore the saved values. */
19863 parser->in_unbraced_linkage_specification_p
19864 = saved_in_unbraced_linkage_specification_p;
19865 parser->num_template_parameter_lists
19866 = saved_num_template_parameter_lists;
19867 parser->in_function_body = saved_in_function_body;
19872 /* Parse a template-declaration, assuming that the `export' (and
19873 `extern') keywords, if present, has already been scanned. MEMBER_P
19874 is as for cp_parser_template_declaration. */
19877 cp_parser_template_declaration_after_export (cp_parser* parser, bool member_p)
19879 tree decl = NULL_TREE;
19880 VEC (deferred_access_check,gc) *checks;
19881 tree parameter_list;
19882 bool friend_p = false;
19883 bool need_lang_pop;
19886 /* Look for the `template' keyword. */
19887 token = cp_lexer_peek_token (parser->lexer);
19888 if (!cp_parser_require_keyword (parser, RID_TEMPLATE, RT_TEMPLATE))
19892 if (!cp_parser_require (parser, CPP_LESS, RT_LESS))
19894 if (at_class_scope_p () && current_function_decl)
19896 /* 14.5.2.2 [temp.mem]
19898 A local class shall not have member templates. */
19899 error_at (token->location,
19900 "invalid declaration of member template in local class");
19901 cp_parser_skip_to_end_of_block_or_statement (parser);
19906 A template ... shall not have C linkage. */
19907 if (current_lang_name == lang_name_c)
19909 error_at (token->location, "template with C linkage");
19910 /* Give it C++ linkage to avoid confusing other parts of the
19912 push_lang_context (lang_name_cplusplus);
19913 need_lang_pop = true;
19916 need_lang_pop = false;
19918 /* We cannot perform access checks on the template parameter
19919 declarations until we know what is being declared, just as we
19920 cannot check the decl-specifier list. */
19921 push_deferring_access_checks (dk_deferred);
19923 /* If the next token is `>', then we have an invalid
19924 specialization. Rather than complain about an invalid template
19925 parameter, issue an error message here. */
19926 if (cp_lexer_next_token_is (parser->lexer, CPP_GREATER))
19928 cp_parser_error (parser, "invalid explicit specialization");
19929 begin_specialization ();
19930 parameter_list = NULL_TREE;
19934 /* Parse the template parameters. */
19935 parameter_list = cp_parser_template_parameter_list (parser);
19936 fixup_template_parms ();
19939 /* Get the deferred access checks from the parameter list. These
19940 will be checked once we know what is being declared, as for a
19941 member template the checks must be performed in the scope of the
19942 class containing the member. */
19943 checks = get_deferred_access_checks ();
19945 /* Look for the `>'. */
19946 cp_parser_skip_to_end_of_template_parameter_list (parser);
19947 /* We just processed one more parameter list. */
19948 ++parser->num_template_parameter_lists;
19949 /* If the next token is `template', there are more template
19951 if (cp_lexer_next_token_is_keyword (parser->lexer,
19953 cp_parser_template_declaration_after_export (parser, member_p);
19956 /* There are no access checks when parsing a template, as we do not
19957 know if a specialization will be a friend. */
19958 push_deferring_access_checks (dk_no_check);
19959 token = cp_lexer_peek_token (parser->lexer);
19960 decl = cp_parser_single_declaration (parser,
19963 /*explicit_specialization_p=*/false,
19965 pop_deferring_access_checks ();
19967 /* If this is a member template declaration, let the front
19969 if (member_p && !friend_p && decl)
19971 if (TREE_CODE (decl) == TYPE_DECL)
19972 cp_parser_check_access_in_redeclaration (decl, token->location);
19974 decl = finish_member_template_decl (decl);
19976 else if (friend_p && decl && TREE_CODE (decl) == TYPE_DECL)
19977 make_friend_class (current_class_type, TREE_TYPE (decl),
19978 /*complain=*/true);
19980 /* We are done with the current parameter list. */
19981 --parser->num_template_parameter_lists;
19983 pop_deferring_access_checks ();
19986 finish_template_decl (parameter_list);
19988 /* Register member declarations. */
19989 if (member_p && !friend_p && decl && !DECL_CLASS_TEMPLATE_P (decl))
19990 finish_member_declaration (decl);
19991 /* For the erroneous case of a template with C linkage, we pushed an
19992 implicit C++ linkage scope; exit that scope now. */
19994 pop_lang_context ();
19995 /* If DECL is a function template, we must return to parse it later.
19996 (Even though there is no definition, there might be default
19997 arguments that need handling.) */
19998 if (member_p && decl
19999 && (TREE_CODE (decl) == FUNCTION_DECL
20000 || DECL_FUNCTION_TEMPLATE_P (decl)))
20001 VEC_safe_push (tree, gc, unparsed_funs_with_definitions, decl);
20004 /* Perform the deferred access checks from a template-parameter-list.
20005 CHECKS is a TREE_LIST of access checks, as returned by
20006 get_deferred_access_checks. */
20009 cp_parser_perform_template_parameter_access_checks (VEC (deferred_access_check,gc)* checks)
20011 ++processing_template_parmlist;
20012 perform_access_checks (checks);
20013 --processing_template_parmlist;
20016 /* Parse a `decl-specifier-seq [opt] init-declarator [opt] ;' or
20017 `function-definition' sequence. MEMBER_P is true, this declaration
20018 appears in a class scope.
20020 Returns the DECL for the declared entity. If FRIEND_P is non-NULL,
20021 *FRIEND_P is set to TRUE iff the declaration is a friend. */
20024 cp_parser_single_declaration (cp_parser* parser,
20025 VEC (deferred_access_check,gc)* checks,
20027 bool explicit_specialization_p,
20030 int declares_class_or_enum;
20031 tree decl = NULL_TREE;
20032 cp_decl_specifier_seq decl_specifiers;
20033 bool function_definition_p = false;
20034 cp_token *decl_spec_token_start;
20036 /* This function is only used when processing a template
20038 gcc_assert (innermost_scope_kind () == sk_template_parms
20039 || innermost_scope_kind () == sk_template_spec);
20041 /* Defer access checks until we know what is being declared. */
20042 push_deferring_access_checks (dk_deferred);
20044 /* Try the `decl-specifier-seq [opt] init-declarator [opt]'
20046 decl_spec_token_start = cp_lexer_peek_token (parser->lexer);
20047 cp_parser_decl_specifier_seq (parser,
20048 CP_PARSER_FLAGS_OPTIONAL,
20050 &declares_class_or_enum);
20052 *friend_p = cp_parser_friend_p (&decl_specifiers);
20054 /* There are no template typedefs. */
20055 if (decl_specifiers.specs[(int) ds_typedef])
20057 error_at (decl_spec_token_start->location,
20058 "template declaration of %<typedef%>");
20059 decl = error_mark_node;
20062 /* Gather up the access checks that occurred the
20063 decl-specifier-seq. */
20064 stop_deferring_access_checks ();
20066 /* Check for the declaration of a template class. */
20067 if (declares_class_or_enum)
20069 if (cp_parser_declares_only_class_p (parser))
20071 decl = shadow_tag (&decl_specifiers);
20076 friend template <typename T> struct A<T>::B;
20079 A<T>::B will be represented by a TYPENAME_TYPE, and
20080 therefore not recognized by shadow_tag. */
20081 if (friend_p && *friend_p
20083 && decl_specifiers.type
20084 && TYPE_P (decl_specifiers.type))
20085 decl = decl_specifiers.type;
20087 if (decl && decl != error_mark_node)
20088 decl = TYPE_NAME (decl);
20090 decl = error_mark_node;
20092 /* Perform access checks for template parameters. */
20093 cp_parser_perform_template_parameter_access_checks (checks);
20097 /* Complain about missing 'typename' or other invalid type names. */
20098 if (!decl_specifiers.any_type_specifiers_p
20099 && cp_parser_parse_and_diagnose_invalid_type_name (parser))
20101 /* cp_parser_parse_and_diagnose_invalid_type_name calls
20102 cp_parser_skip_to_end_of_block_or_statement, so don't try to parse
20103 the rest of this declaration. */
20104 decl = error_mark_node;
20108 /* If it's not a template class, try for a template function. If
20109 the next token is a `;', then this declaration does not declare
20110 anything. But, if there were errors in the decl-specifiers, then
20111 the error might well have come from an attempted class-specifier.
20112 In that case, there's no need to warn about a missing declarator. */
20114 && (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON)
20115 || decl_specifiers.type != error_mark_node))
20117 decl = cp_parser_init_declarator (parser,
20120 /*function_definition_allowed_p=*/true,
20122 declares_class_or_enum,
20123 &function_definition_p,
20126 /* 7.1.1-1 [dcl.stc]
20128 A storage-class-specifier shall not be specified in an explicit
20129 specialization... */
20131 && explicit_specialization_p
20132 && decl_specifiers.storage_class != sc_none)
20134 error_at (decl_spec_token_start->location,
20135 "explicit template specialization cannot have a storage class");
20136 decl = error_mark_node;
20140 /* Look for a trailing `;' after the declaration. */
20141 if (!function_definition_p
20142 && (decl == error_mark_node
20143 || !cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON)))
20144 cp_parser_skip_to_end_of_block_or_statement (parser);
20147 pop_deferring_access_checks ();
20149 /* Clear any current qualification; whatever comes next is the start
20150 of something new. */
20151 parser->scope = NULL_TREE;
20152 parser->qualifying_scope = NULL_TREE;
20153 parser->object_scope = NULL_TREE;
20158 /* Parse a cast-expression that is not the operand of a unary "&". */
20161 cp_parser_simple_cast_expression (cp_parser *parser)
20163 return cp_parser_cast_expression (parser, /*address_p=*/false,
20164 /*cast_p=*/false, NULL);
20167 /* Parse a functional cast to TYPE. Returns an expression
20168 representing the cast. */
20171 cp_parser_functional_cast (cp_parser* parser, tree type)
20174 tree expression_list;
20178 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
20180 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
20181 expression_list = cp_parser_braced_list (parser, &nonconst_p);
20182 CONSTRUCTOR_IS_DIRECT_INIT (expression_list) = 1;
20183 if (TREE_CODE (type) == TYPE_DECL)
20184 type = TREE_TYPE (type);
20185 return finish_compound_literal (type, expression_list,
20186 tf_warning_or_error);
20190 vec = cp_parser_parenthesized_expression_list (parser, non_attr,
20192 /*allow_expansion_p=*/true,
20193 /*non_constant_p=*/NULL);
20195 expression_list = error_mark_node;
20198 expression_list = build_tree_list_vec (vec);
20199 release_tree_vector (vec);
20202 cast = build_functional_cast (type, expression_list,
20203 tf_warning_or_error);
20204 /* [expr.const]/1: In an integral constant expression "only type
20205 conversions to integral or enumeration type can be used". */
20206 if (TREE_CODE (type) == TYPE_DECL)
20207 type = TREE_TYPE (type);
20208 if (cast != error_mark_node
20209 && !cast_valid_in_integral_constant_expression_p (type)
20210 && cp_parser_non_integral_constant_expression (parser,
20212 return error_mark_node;
20216 /* Save the tokens that make up the body of a member function defined
20217 in a class-specifier. The DECL_SPECIFIERS and DECLARATOR have
20218 already been parsed. The ATTRIBUTES are any GNU "__attribute__"
20219 specifiers applied to the declaration. Returns the FUNCTION_DECL
20220 for the member function. */
20223 cp_parser_save_member_function_body (cp_parser* parser,
20224 cp_decl_specifier_seq *decl_specifiers,
20225 cp_declarator *declarator,
20232 /* Create the FUNCTION_DECL. */
20233 fn = grokmethod (decl_specifiers, declarator, attributes);
20234 /* If something went badly wrong, bail out now. */
20235 if (fn == error_mark_node)
20237 /* If there's a function-body, skip it. */
20238 if (cp_parser_token_starts_function_definition_p
20239 (cp_lexer_peek_token (parser->lexer)))
20240 cp_parser_skip_to_end_of_block_or_statement (parser);
20241 return error_mark_node;
20244 /* Remember it, if there default args to post process. */
20245 cp_parser_save_default_args (parser, fn);
20247 /* Save away the tokens that make up the body of the
20249 first = parser->lexer->next_token;
20250 /* We can have braced-init-list mem-initializers before the fn body. */
20251 if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
20253 cp_lexer_consume_token (parser->lexer);
20254 while (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE)
20255 && cp_lexer_next_token_is_not_keyword (parser->lexer, RID_TRY))
20257 /* cache_group will stop after an un-nested { } pair, too. */
20258 if (cp_parser_cache_group (parser, CPP_CLOSE_PAREN, /*depth=*/0))
20261 /* variadic mem-inits have ... after the ')'. */
20262 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
20263 cp_lexer_consume_token (parser->lexer);
20266 cp_parser_cache_group (parser, CPP_CLOSE_BRACE, /*depth=*/0);
20267 /* Handle function try blocks. */
20268 while (cp_lexer_next_token_is_keyword (parser->lexer, RID_CATCH))
20269 cp_parser_cache_group (parser, CPP_CLOSE_BRACE, /*depth=*/0);
20270 last = parser->lexer->next_token;
20272 /* Save away the inline definition; we will process it when the
20273 class is complete. */
20274 DECL_PENDING_INLINE_INFO (fn) = cp_token_cache_new (first, last);
20275 DECL_PENDING_INLINE_P (fn) = 1;
20277 /* We need to know that this was defined in the class, so that
20278 friend templates are handled correctly. */
20279 DECL_INITIALIZED_IN_CLASS_P (fn) = 1;
20281 /* Add FN to the queue of functions to be parsed later. */
20282 VEC_safe_push (tree, gc, unparsed_funs_with_definitions, fn);
20287 /* Parse a template-argument-list, as well as the trailing ">" (but
20288 not the opening ">"). See cp_parser_template_argument_list for the
20292 cp_parser_enclosed_template_argument_list (cp_parser* parser)
20296 tree saved_qualifying_scope;
20297 tree saved_object_scope;
20298 bool saved_greater_than_is_operator_p;
20299 int saved_unevaluated_operand;
20300 int saved_inhibit_evaluation_warnings;
20304 When parsing a template-id, the first non-nested `>' is taken as
20305 the end of the template-argument-list rather than a greater-than
20307 saved_greater_than_is_operator_p
20308 = parser->greater_than_is_operator_p;
20309 parser->greater_than_is_operator_p = false;
20310 /* Parsing the argument list may modify SCOPE, so we save it
20312 saved_scope = parser->scope;
20313 saved_qualifying_scope = parser->qualifying_scope;
20314 saved_object_scope = parser->object_scope;
20315 /* We need to evaluate the template arguments, even though this
20316 template-id may be nested within a "sizeof". */
20317 saved_unevaluated_operand = cp_unevaluated_operand;
20318 cp_unevaluated_operand = 0;
20319 saved_inhibit_evaluation_warnings = c_inhibit_evaluation_warnings;
20320 c_inhibit_evaluation_warnings = 0;
20321 /* Parse the template-argument-list itself. */
20322 if (cp_lexer_next_token_is (parser->lexer, CPP_GREATER)
20323 || cp_lexer_next_token_is (parser->lexer, CPP_RSHIFT))
20324 arguments = NULL_TREE;
20326 arguments = cp_parser_template_argument_list (parser);
20327 /* Look for the `>' that ends the template-argument-list. If we find
20328 a '>>' instead, it's probably just a typo. */
20329 if (cp_lexer_next_token_is (parser->lexer, CPP_RSHIFT))
20331 if (cxx_dialect != cxx98)
20333 /* In C++0x, a `>>' in a template argument list or cast
20334 expression is considered to be two separate `>'
20335 tokens. So, change the current token to a `>', but don't
20336 consume it: it will be consumed later when the outer
20337 template argument list (or cast expression) is parsed.
20338 Note that this replacement of `>' for `>>' is necessary
20339 even if we are parsing tentatively: in the tentative
20340 case, after calling
20341 cp_parser_enclosed_template_argument_list we will always
20342 throw away all of the template arguments and the first
20343 closing `>', either because the template argument list
20344 was erroneous or because we are replacing those tokens
20345 with a CPP_TEMPLATE_ID token. The second `>' (which will
20346 not have been thrown away) is needed either to close an
20347 outer template argument list or to complete a new-style
20349 cp_token *token = cp_lexer_peek_token (parser->lexer);
20350 token->type = CPP_GREATER;
20352 else if (!saved_greater_than_is_operator_p)
20354 /* If we're in a nested template argument list, the '>>' has
20355 to be a typo for '> >'. We emit the error message, but we
20356 continue parsing and we push a '>' as next token, so that
20357 the argument list will be parsed correctly. Note that the
20358 global source location is still on the token before the
20359 '>>', so we need to say explicitly where we want it. */
20360 cp_token *token = cp_lexer_peek_token (parser->lexer);
20361 error_at (token->location, "%<>>%> should be %<> >%> "
20362 "within a nested template argument list");
20364 token->type = CPP_GREATER;
20368 /* If this is not a nested template argument list, the '>>'
20369 is a typo for '>'. Emit an error message and continue.
20370 Same deal about the token location, but here we can get it
20371 right by consuming the '>>' before issuing the diagnostic. */
20372 cp_token *token = cp_lexer_consume_token (parser->lexer);
20373 error_at (token->location,
20374 "spurious %<>>%>, use %<>%> to terminate "
20375 "a template argument list");
20379 cp_parser_skip_to_end_of_template_parameter_list (parser);
20380 /* The `>' token might be a greater-than operator again now. */
20381 parser->greater_than_is_operator_p
20382 = saved_greater_than_is_operator_p;
20383 /* Restore the SAVED_SCOPE. */
20384 parser->scope = saved_scope;
20385 parser->qualifying_scope = saved_qualifying_scope;
20386 parser->object_scope = saved_object_scope;
20387 cp_unevaluated_operand = saved_unevaluated_operand;
20388 c_inhibit_evaluation_warnings = saved_inhibit_evaluation_warnings;
20393 /* MEMBER_FUNCTION is a member function, or a friend. If default
20394 arguments, or the body of the function have not yet been parsed,
20398 cp_parser_late_parsing_for_member (cp_parser* parser, tree member_function)
20400 timevar_push (TV_PARSE_INMETH);
20401 /* If this member is a template, get the underlying
20403 if (DECL_FUNCTION_TEMPLATE_P (member_function))
20404 member_function = DECL_TEMPLATE_RESULT (member_function);
20406 /* There should not be any class definitions in progress at this
20407 point; the bodies of members are only parsed outside of all class
20409 gcc_assert (parser->num_classes_being_defined == 0);
20410 /* While we're parsing the member functions we might encounter more
20411 classes. We want to handle them right away, but we don't want
20412 them getting mixed up with functions that are currently in the
20414 push_unparsed_function_queues (parser);
20416 /* Make sure that any template parameters are in scope. */
20417 maybe_begin_member_template_processing (member_function);
20419 /* If the body of the function has not yet been parsed, parse it
20421 if (DECL_PENDING_INLINE_P (member_function))
20423 tree function_scope;
20424 cp_token_cache *tokens;
20426 /* The function is no longer pending; we are processing it. */
20427 tokens = DECL_PENDING_INLINE_INFO (member_function);
20428 DECL_PENDING_INLINE_INFO (member_function) = NULL;
20429 DECL_PENDING_INLINE_P (member_function) = 0;
20431 /* If this is a local class, enter the scope of the containing
20433 function_scope = current_function_decl;
20434 if (function_scope)
20435 push_function_context ();
20437 /* Push the body of the function onto the lexer stack. */
20438 cp_parser_push_lexer_for_tokens (parser, tokens);
20440 /* Let the front end know that we going to be defining this
20442 start_preparsed_function (member_function, NULL_TREE,
20443 SF_PRE_PARSED | SF_INCLASS_INLINE);
20445 /* Don't do access checking if it is a templated function. */
20446 if (processing_template_decl)
20447 push_deferring_access_checks (dk_no_check);
20449 /* Now, parse the body of the function. */
20450 cp_parser_function_definition_after_declarator (parser,
20451 /*inline_p=*/true);
20453 if (processing_template_decl)
20454 pop_deferring_access_checks ();
20456 /* Leave the scope of the containing function. */
20457 if (function_scope)
20458 pop_function_context ();
20459 cp_parser_pop_lexer (parser);
20462 /* Remove any template parameters from the symbol table. */
20463 maybe_end_member_template_processing ();
20465 /* Restore the queue. */
20466 pop_unparsed_function_queues (parser);
20467 timevar_pop (TV_PARSE_INMETH);
20470 /* If DECL contains any default args, remember it on the unparsed
20471 functions queue. */
20474 cp_parser_save_default_args (cp_parser* parser, tree decl)
20478 for (probe = TYPE_ARG_TYPES (TREE_TYPE (decl));
20480 probe = TREE_CHAIN (probe))
20481 if (TREE_PURPOSE (probe))
20483 cp_default_arg_entry *entry
20484 = VEC_safe_push (cp_default_arg_entry, gc,
20485 unparsed_funs_with_default_args, NULL);
20486 entry->class_type = current_class_type;
20487 entry->decl = decl;
20492 /* FN is a FUNCTION_DECL which may contains a parameter with an
20493 unparsed DEFAULT_ARG. Parse the default args now. This function
20494 assumes that the current scope is the scope in which the default
20495 argument should be processed. */
20498 cp_parser_late_parsing_default_args (cp_parser *parser, tree fn)
20500 bool saved_local_variables_forbidden_p;
20501 tree parm, parmdecl;
20503 /* While we're parsing the default args, we might (due to the
20504 statement expression extension) encounter more classes. We want
20505 to handle them right away, but we don't want them getting mixed
20506 up with default args that are currently in the queue. */
20507 push_unparsed_function_queues (parser);
20509 /* Local variable names (and the `this' keyword) may not appear
20510 in a default argument. */
20511 saved_local_variables_forbidden_p = parser->local_variables_forbidden_p;
20512 parser->local_variables_forbidden_p = true;
20514 push_defarg_context (fn);
20516 for (parm = TYPE_ARG_TYPES (TREE_TYPE (fn)),
20517 parmdecl = DECL_ARGUMENTS (fn);
20518 parm && parm != void_list_node;
20519 parm = TREE_CHAIN (parm),
20520 parmdecl = DECL_CHAIN (parmdecl))
20522 cp_token_cache *tokens;
20523 tree default_arg = TREE_PURPOSE (parm);
20525 VEC(tree,gc) *insts;
20532 if (TREE_CODE (default_arg) != DEFAULT_ARG)
20533 /* This can happen for a friend declaration for a function
20534 already declared with default arguments. */
20537 /* Push the saved tokens for the default argument onto the parser's
20539 tokens = DEFARG_TOKENS (default_arg);
20540 cp_parser_push_lexer_for_tokens (parser, tokens);
20542 start_lambda_scope (parmdecl);
20544 /* Parse the assignment-expression. */
20545 parsed_arg = cp_parser_assignment_expression (parser, /*cast_p=*/false, NULL);
20546 if (parsed_arg == error_mark_node)
20548 cp_parser_pop_lexer (parser);
20552 if (!processing_template_decl)
20553 parsed_arg = check_default_argument (TREE_VALUE (parm), parsed_arg);
20555 TREE_PURPOSE (parm) = parsed_arg;
20557 /* Update any instantiations we've already created. */
20558 for (insts = DEFARG_INSTANTIATIONS (default_arg), ix = 0;
20559 VEC_iterate (tree, insts, ix, copy); ix++)
20560 TREE_PURPOSE (copy) = parsed_arg;
20562 finish_lambda_scope ();
20564 /* If the token stream has not been completely used up, then
20565 there was extra junk after the end of the default
20567 if (!cp_lexer_next_token_is (parser->lexer, CPP_EOF))
20568 cp_parser_error (parser, "expected %<,%>");
20570 /* Revert to the main lexer. */
20571 cp_parser_pop_lexer (parser);
20574 pop_defarg_context ();
20576 /* Make sure no default arg is missing. */
20577 check_default_args (fn);
20579 /* Restore the state of local_variables_forbidden_p. */
20580 parser->local_variables_forbidden_p = saved_local_variables_forbidden_p;
20582 /* Restore the queue. */
20583 pop_unparsed_function_queues (parser);
20586 /* Parse the operand of `sizeof' (or a similar operator). Returns
20587 either a TYPE or an expression, depending on the form of the
20588 input. The KEYWORD indicates which kind of expression we have
20592 cp_parser_sizeof_operand (cp_parser* parser, enum rid keyword)
20594 tree expr = NULL_TREE;
20595 const char *saved_message;
20597 bool saved_integral_constant_expression_p;
20598 bool saved_non_integral_constant_expression_p;
20599 bool pack_expansion_p = false;
20601 /* Types cannot be defined in a `sizeof' expression. Save away the
20603 saved_message = parser->type_definition_forbidden_message;
20604 /* And create the new one. */
20605 tmp = concat ("types may not be defined in %<",
20606 IDENTIFIER_POINTER (ridpointers[keyword]),
20607 "%> expressions", NULL);
20608 parser->type_definition_forbidden_message = tmp;
20610 /* The restrictions on constant-expressions do not apply inside
20611 sizeof expressions. */
20612 saved_integral_constant_expression_p
20613 = parser->integral_constant_expression_p;
20614 saved_non_integral_constant_expression_p
20615 = parser->non_integral_constant_expression_p;
20616 parser->integral_constant_expression_p = false;
20618 /* If it's a `...', then we are computing the length of a parameter
20620 if (keyword == RID_SIZEOF
20621 && cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
20623 /* Consume the `...'. */
20624 cp_lexer_consume_token (parser->lexer);
20625 maybe_warn_variadic_templates ();
20627 /* Note that this is an expansion. */
20628 pack_expansion_p = true;
20631 /* Do not actually evaluate the expression. */
20632 ++cp_unevaluated_operand;
20633 ++c_inhibit_evaluation_warnings;
20634 /* If it's a `(', then we might be looking at the type-id
20636 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
20639 bool saved_in_type_id_in_expr_p;
20641 /* We can't be sure yet whether we're looking at a type-id or an
20643 cp_parser_parse_tentatively (parser);
20644 /* Consume the `('. */
20645 cp_lexer_consume_token (parser->lexer);
20646 /* Parse the type-id. */
20647 saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
20648 parser->in_type_id_in_expr_p = true;
20649 type = cp_parser_type_id (parser);
20650 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
20651 /* Now, look for the trailing `)'. */
20652 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
20653 /* If all went well, then we're done. */
20654 if (cp_parser_parse_definitely (parser))
20656 cp_decl_specifier_seq decl_specs;
20658 /* Build a trivial decl-specifier-seq. */
20659 clear_decl_specs (&decl_specs);
20660 decl_specs.type = type;
20662 /* Call grokdeclarator to figure out what type this is. */
20663 expr = grokdeclarator (NULL,
20667 /*attrlist=*/NULL);
20671 /* If the type-id production did not work out, then we must be
20672 looking at the unary-expression production. */
20674 expr = cp_parser_unary_expression (parser, /*address_p=*/false,
20675 /*cast_p=*/false, NULL);
20677 if (pack_expansion_p)
20678 /* Build a pack expansion. */
20679 expr = make_pack_expansion (expr);
20681 /* Go back to evaluating expressions. */
20682 --cp_unevaluated_operand;
20683 --c_inhibit_evaluation_warnings;
20685 /* Free the message we created. */
20687 /* And restore the old one. */
20688 parser->type_definition_forbidden_message = saved_message;
20689 parser->integral_constant_expression_p
20690 = saved_integral_constant_expression_p;
20691 parser->non_integral_constant_expression_p
20692 = saved_non_integral_constant_expression_p;
20697 /* If the current declaration has no declarator, return true. */
20700 cp_parser_declares_only_class_p (cp_parser *parser)
20702 /* If the next token is a `;' or a `,' then there is no
20704 return (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)
20705 || cp_lexer_next_token_is (parser->lexer, CPP_COMMA));
20708 /* Update the DECL_SPECS to reflect the storage class indicated by
20712 cp_parser_set_storage_class (cp_parser *parser,
20713 cp_decl_specifier_seq *decl_specs,
20715 location_t location)
20717 cp_storage_class storage_class;
20719 if (parser->in_unbraced_linkage_specification_p)
20721 error_at (location, "invalid use of %qD in linkage specification",
20722 ridpointers[keyword]);
20725 else if (decl_specs->storage_class != sc_none)
20727 decl_specs->conflicting_specifiers_p = true;
20731 if ((keyword == RID_EXTERN || keyword == RID_STATIC)
20732 && decl_specs->specs[(int) ds_thread])
20734 error_at (location, "%<__thread%> before %qD", ridpointers[keyword]);
20735 decl_specs->specs[(int) ds_thread] = 0;
20741 storage_class = sc_auto;
20744 storage_class = sc_register;
20747 storage_class = sc_static;
20750 storage_class = sc_extern;
20753 storage_class = sc_mutable;
20756 gcc_unreachable ();
20758 decl_specs->storage_class = storage_class;
20760 /* A storage class specifier cannot be applied alongside a typedef
20761 specifier. If there is a typedef specifier present then set
20762 conflicting_specifiers_p which will trigger an error later
20763 on in grokdeclarator. */
20764 if (decl_specs->specs[(int)ds_typedef])
20765 decl_specs->conflicting_specifiers_p = true;
20768 /* Update the DECL_SPECS to reflect the TYPE_SPEC. If USER_DEFINED_P
20769 is true, the type is a user-defined type; otherwise it is a
20770 built-in type specified by a keyword. */
20773 cp_parser_set_decl_spec_type (cp_decl_specifier_seq *decl_specs,
20775 location_t location,
20776 bool user_defined_p)
20778 decl_specs->any_specifiers_p = true;
20780 /* If the user tries to redeclare bool, char16_t, char32_t, or wchar_t
20781 (with, for example, in "typedef int wchar_t;") we remember that
20782 this is what happened. In system headers, we ignore these
20783 declarations so that G++ can work with system headers that are not
20785 if (decl_specs->specs[(int) ds_typedef]
20787 && (type_spec == boolean_type_node
20788 || type_spec == char16_type_node
20789 || type_spec == char32_type_node
20790 || type_spec == wchar_type_node)
20791 && (decl_specs->type
20792 || decl_specs->specs[(int) ds_long]
20793 || decl_specs->specs[(int) ds_short]
20794 || decl_specs->specs[(int) ds_unsigned]
20795 || decl_specs->specs[(int) ds_signed]))
20797 decl_specs->redefined_builtin_type = type_spec;
20798 if (!decl_specs->type)
20800 decl_specs->type = type_spec;
20801 decl_specs->user_defined_type_p = false;
20802 decl_specs->type_location = location;
20805 else if (decl_specs->type)
20806 decl_specs->multiple_types_p = true;
20809 decl_specs->type = type_spec;
20810 decl_specs->user_defined_type_p = user_defined_p;
20811 decl_specs->redefined_builtin_type = NULL_TREE;
20812 decl_specs->type_location = location;
20816 /* DECL_SPECIFIERS is the representation of a decl-specifier-seq.
20817 Returns TRUE iff `friend' appears among the DECL_SPECIFIERS. */
20820 cp_parser_friend_p (const cp_decl_specifier_seq *decl_specifiers)
20822 return decl_specifiers->specs[(int) ds_friend] != 0;
20825 /* Issue an error message indicating that TOKEN_DESC was expected.
20826 If KEYWORD is true, it indicated this function is called by
20827 cp_parser_require_keword and the required token can only be
20828 a indicated keyword. */
20831 cp_parser_required_error (cp_parser *parser,
20832 required_token token_desc,
20835 switch (token_desc)
20838 cp_parser_error (parser, "expected %<new%>");
20841 cp_parser_error (parser, "expected %<delete%>");
20844 cp_parser_error (parser, "expected %<return%>");
20847 cp_parser_error (parser, "expected %<while%>");
20850 cp_parser_error (parser, "expected %<extern%>");
20852 case RT_STATIC_ASSERT:
20853 cp_parser_error (parser, "expected %<static_assert%>");
20856 cp_parser_error (parser, "expected %<decltype%>");
20859 cp_parser_error (parser, "expected %<operator%>");
20862 cp_parser_error (parser, "expected %<class%>");
20865 cp_parser_error (parser, "expected %<template%>");
20868 cp_parser_error (parser, "expected %<namespace%>");
20871 cp_parser_error (parser, "expected %<using%>");
20874 cp_parser_error (parser, "expected %<asm%>");
20877 cp_parser_error (parser, "expected %<try%>");
20880 cp_parser_error (parser, "expected %<catch%>");
20883 cp_parser_error (parser, "expected %<throw%>");
20886 cp_parser_error (parser, "expected %<__label__%>");
20889 cp_parser_error (parser, "expected %<@try%>");
20891 case RT_AT_SYNCHRONIZED:
20892 cp_parser_error (parser, "expected %<@synchronized%>");
20895 cp_parser_error (parser, "expected %<@throw%>");
20902 switch (token_desc)
20905 cp_parser_error (parser, "expected %<;%>");
20907 case RT_OPEN_PAREN:
20908 cp_parser_error (parser, "expected %<(%>");
20910 case RT_CLOSE_BRACE:
20911 cp_parser_error (parser, "expected %<}%>");
20913 case RT_OPEN_BRACE:
20914 cp_parser_error (parser, "expected %<{%>");
20916 case RT_CLOSE_SQUARE:
20917 cp_parser_error (parser, "expected %<]%>");
20919 case RT_OPEN_SQUARE:
20920 cp_parser_error (parser, "expected %<[%>");
20923 cp_parser_error (parser, "expected %<,%>");
20926 cp_parser_error (parser, "expected %<::%>");
20929 cp_parser_error (parser, "expected %<<%>");
20932 cp_parser_error (parser, "expected %<>%>");
20935 cp_parser_error (parser, "expected %<=%>");
20938 cp_parser_error (parser, "expected %<...%>");
20941 cp_parser_error (parser, "expected %<*%>");
20944 cp_parser_error (parser, "expected %<~%>");
20947 cp_parser_error (parser, "expected %<:%>");
20949 case RT_COLON_SCOPE:
20950 cp_parser_error (parser, "expected %<:%> or %<::%>");
20952 case RT_CLOSE_PAREN:
20953 cp_parser_error (parser, "expected %<)%>");
20955 case RT_COMMA_CLOSE_PAREN:
20956 cp_parser_error (parser, "expected %<,%> or %<)%>");
20958 case RT_PRAGMA_EOL:
20959 cp_parser_error (parser, "expected end of line");
20962 cp_parser_error (parser, "expected identifier");
20965 cp_parser_error (parser, "expected selection-statement");
20967 case RT_INTERATION:
20968 cp_parser_error (parser, "expected iteration-statement");
20971 cp_parser_error (parser, "expected jump-statement");
20974 cp_parser_error (parser, "expected class-key");
20976 case RT_CLASS_TYPENAME_TEMPLATE:
20977 cp_parser_error (parser,
20978 "expected %<class%>, %<typename%>, or %<template%>");
20981 gcc_unreachable ();
20985 gcc_unreachable ();
20990 /* If the next token is of the indicated TYPE, consume it. Otherwise,
20991 issue an error message indicating that TOKEN_DESC was expected.
20993 Returns the token consumed, if the token had the appropriate type.
20994 Otherwise, returns NULL. */
20997 cp_parser_require (cp_parser* parser,
20998 enum cpp_ttype type,
20999 required_token token_desc)
21001 if (cp_lexer_next_token_is (parser->lexer, type))
21002 return cp_lexer_consume_token (parser->lexer);
21005 /* Output the MESSAGE -- unless we're parsing tentatively. */
21006 if (!cp_parser_simulate_error (parser))
21007 cp_parser_required_error (parser, token_desc, /*keyword=*/false);
21012 /* An error message is produced if the next token is not '>'.
21013 All further tokens are skipped until the desired token is
21014 found or '{', '}', ';' or an unbalanced ')' or ']'. */
21017 cp_parser_skip_to_end_of_template_parameter_list (cp_parser* parser)
21019 /* Current level of '< ... >'. */
21020 unsigned level = 0;
21021 /* Ignore '<' and '>' nested inside '( ... )' or '[ ... ]'. */
21022 unsigned nesting_depth = 0;
21024 /* Are we ready, yet? If not, issue error message. */
21025 if (cp_parser_require (parser, CPP_GREATER, RT_GREATER))
21028 /* Skip tokens until the desired token is found. */
21031 /* Peek at the next token. */
21032 switch (cp_lexer_peek_token (parser->lexer)->type)
21035 if (!nesting_depth)
21040 if (cxx_dialect == cxx98)
21041 /* C++0x views the `>>' operator as two `>' tokens, but
21044 else if (!nesting_depth && level-- == 0)
21046 /* We've hit a `>>' where the first `>' closes the
21047 template argument list, and the second `>' is
21048 spurious. Just consume the `>>' and stop; we've
21049 already produced at least one error. */
21050 cp_lexer_consume_token (parser->lexer);
21053 /* Fall through for C++0x, so we handle the second `>' in
21057 if (!nesting_depth && level-- == 0)
21059 /* We've reached the token we want, consume it and stop. */
21060 cp_lexer_consume_token (parser->lexer);
21065 case CPP_OPEN_PAREN:
21066 case CPP_OPEN_SQUARE:
21070 case CPP_CLOSE_PAREN:
21071 case CPP_CLOSE_SQUARE:
21072 if (nesting_depth-- == 0)
21077 case CPP_PRAGMA_EOL:
21078 case CPP_SEMICOLON:
21079 case CPP_OPEN_BRACE:
21080 case CPP_CLOSE_BRACE:
21081 /* The '>' was probably forgotten, don't look further. */
21088 /* Consume this token. */
21089 cp_lexer_consume_token (parser->lexer);
21093 /* If the next token is the indicated keyword, consume it. Otherwise,
21094 issue an error message indicating that TOKEN_DESC was expected.
21096 Returns the token consumed, if the token had the appropriate type.
21097 Otherwise, returns NULL. */
21100 cp_parser_require_keyword (cp_parser* parser,
21102 required_token token_desc)
21104 cp_token *token = cp_parser_require (parser, CPP_KEYWORD, token_desc);
21106 if (token && token->keyword != keyword)
21108 cp_parser_required_error (parser, token_desc, /*keyword=*/true);
21115 /* Returns TRUE iff TOKEN is a token that can begin the body of a
21116 function-definition. */
21119 cp_parser_token_starts_function_definition_p (cp_token* token)
21121 return (/* An ordinary function-body begins with an `{'. */
21122 token->type == CPP_OPEN_BRACE
21123 /* A ctor-initializer begins with a `:'. */
21124 || token->type == CPP_COLON
21125 /* A function-try-block begins with `try'. */
21126 || token->keyword == RID_TRY
21127 /* The named return value extension begins with `return'. */
21128 || token->keyword == RID_RETURN);
21131 /* Returns TRUE iff the next token is the ":" or "{" beginning a class
21135 cp_parser_next_token_starts_class_definition_p (cp_parser *parser)
21139 token = cp_lexer_peek_token (parser->lexer);
21140 return (token->type == CPP_OPEN_BRACE || token->type == CPP_COLON);
21143 /* Returns TRUE iff the next token is the "," or ">" (or `>>', in
21144 C++0x) ending a template-argument. */
21147 cp_parser_next_token_ends_template_argument_p (cp_parser *parser)
21151 token = cp_lexer_peek_token (parser->lexer);
21152 return (token->type == CPP_COMMA
21153 || token->type == CPP_GREATER
21154 || token->type == CPP_ELLIPSIS
21155 || ((cxx_dialect != cxx98) && token->type == CPP_RSHIFT));
21158 /* Returns TRUE iff the n-th token is a "<", or the n-th is a "[" and the
21159 (n+1)-th is a ":" (which is a possible digraph typo for "< ::"). */
21162 cp_parser_nth_token_starts_template_argument_list_p (cp_parser * parser,
21167 token = cp_lexer_peek_nth_token (parser->lexer, n);
21168 if (token->type == CPP_LESS)
21170 /* Check for the sequence `<::' in the original code. It would be lexed as
21171 `[:', where `[' is a digraph, and there is no whitespace before
21173 if (token->type == CPP_OPEN_SQUARE && token->flags & DIGRAPH)
21176 token2 = cp_lexer_peek_nth_token (parser->lexer, n+1);
21177 if (token2->type == CPP_COLON && !(token2->flags & PREV_WHITE))
21183 /* Returns the kind of tag indicated by TOKEN, if it is a class-key,
21184 or none_type otherwise. */
21186 static enum tag_types
21187 cp_parser_token_is_class_key (cp_token* token)
21189 switch (token->keyword)
21194 return record_type;
21203 /* Issue an error message if the CLASS_KEY does not match the TYPE. */
21206 cp_parser_check_class_key (enum tag_types class_key, tree type)
21208 if ((TREE_CODE (type) == UNION_TYPE) != (class_key == union_type))
21209 permerror (input_location, "%qs tag used in naming %q#T",
21210 class_key == union_type ? "union"
21211 : class_key == record_type ? "struct" : "class",
21215 /* Issue an error message if DECL is redeclared with different
21216 access than its original declaration [class.access.spec/3].
21217 This applies to nested classes and nested class templates.
21221 cp_parser_check_access_in_redeclaration (tree decl, location_t location)
21223 if (!decl || !CLASS_TYPE_P (TREE_TYPE (decl)))
21226 if ((TREE_PRIVATE (decl)
21227 != (current_access_specifier == access_private_node))
21228 || (TREE_PROTECTED (decl)
21229 != (current_access_specifier == access_protected_node)))
21230 error_at (location, "%qD redeclared with different access", decl);
21233 /* Look for the `template' keyword, as a syntactic disambiguator.
21234 Return TRUE iff it is present, in which case it will be
21238 cp_parser_optional_template_keyword (cp_parser *parser)
21240 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
21242 /* The `template' keyword can only be used within templates;
21243 outside templates the parser can always figure out what is a
21244 template and what is not. */
21245 if (!processing_template_decl)
21247 cp_token *token = cp_lexer_peek_token (parser->lexer);
21248 error_at (token->location,
21249 "%<template%> (as a disambiguator) is only allowed "
21250 "within templates");
21251 /* If this part of the token stream is rescanned, the same
21252 error message would be generated. So, we purge the token
21253 from the stream. */
21254 cp_lexer_purge_token (parser->lexer);
21259 /* Consume the `template' keyword. */
21260 cp_lexer_consume_token (parser->lexer);
21268 /* The next token is a CPP_NESTED_NAME_SPECIFIER. Consume the token,
21269 set PARSER->SCOPE, and perform other related actions. */
21272 cp_parser_pre_parsed_nested_name_specifier (cp_parser *parser)
21275 struct tree_check *check_value;
21276 deferred_access_check *chk;
21277 VEC (deferred_access_check,gc) *checks;
21279 /* Get the stored value. */
21280 check_value = cp_lexer_consume_token (parser->lexer)->u.tree_check_value;
21281 /* Perform any access checks that were deferred. */
21282 checks = check_value->checks;
21285 FOR_EACH_VEC_ELT (deferred_access_check, checks, i, chk)
21286 perform_or_defer_access_check (chk->binfo,
21290 /* Set the scope from the stored value. */
21291 parser->scope = check_value->value;
21292 parser->qualifying_scope = check_value->qualifying_scope;
21293 parser->object_scope = NULL_TREE;
21296 /* Consume tokens up through a non-nested END token. Returns TRUE if we
21297 encounter the end of a block before what we were looking for. */
21300 cp_parser_cache_group (cp_parser *parser,
21301 enum cpp_ttype end,
21306 cp_token *token = cp_lexer_peek_token (parser->lexer);
21308 /* Abort a parenthesized expression if we encounter a semicolon. */
21309 if ((end == CPP_CLOSE_PAREN || depth == 0)
21310 && token->type == CPP_SEMICOLON)
21312 /* If we've reached the end of the file, stop. */
21313 if (token->type == CPP_EOF
21314 || (end != CPP_PRAGMA_EOL
21315 && token->type == CPP_PRAGMA_EOL))
21317 if (token->type == CPP_CLOSE_BRACE && depth == 0)
21318 /* We've hit the end of an enclosing block, so there's been some
21319 kind of syntax error. */
21322 /* Consume the token. */
21323 cp_lexer_consume_token (parser->lexer);
21324 /* See if it starts a new group. */
21325 if (token->type == CPP_OPEN_BRACE)
21327 cp_parser_cache_group (parser, CPP_CLOSE_BRACE, depth + 1);
21328 /* In theory this should probably check end == '}', but
21329 cp_parser_save_member_function_body needs it to exit
21330 after either '}' or ')' when called with ')'. */
21334 else if (token->type == CPP_OPEN_PAREN)
21336 cp_parser_cache_group (parser, CPP_CLOSE_PAREN, depth + 1);
21337 if (depth == 0 && end == CPP_CLOSE_PAREN)
21340 else if (token->type == CPP_PRAGMA)
21341 cp_parser_cache_group (parser, CPP_PRAGMA_EOL, depth + 1);
21342 else if (token->type == end)
21347 /* Begin parsing tentatively. We always save tokens while parsing
21348 tentatively so that if the tentative parsing fails we can restore the
21352 cp_parser_parse_tentatively (cp_parser* parser)
21354 /* Enter a new parsing context. */
21355 parser->context = cp_parser_context_new (parser->context);
21356 /* Begin saving tokens. */
21357 cp_lexer_save_tokens (parser->lexer);
21358 /* In order to avoid repetitive access control error messages,
21359 access checks are queued up until we are no longer parsing
21361 push_deferring_access_checks (dk_deferred);
21364 /* Commit to the currently active tentative parse. */
21367 cp_parser_commit_to_tentative_parse (cp_parser* parser)
21369 cp_parser_context *context;
21372 /* Mark all of the levels as committed. */
21373 lexer = parser->lexer;
21374 for (context = parser->context; context->next; context = context->next)
21376 if (context->status == CP_PARSER_STATUS_KIND_COMMITTED)
21378 context->status = CP_PARSER_STATUS_KIND_COMMITTED;
21379 while (!cp_lexer_saving_tokens (lexer))
21380 lexer = lexer->next;
21381 cp_lexer_commit_tokens (lexer);
21385 /* Abort the currently active tentative parse. All consumed tokens
21386 will be rolled back, and no diagnostics will be issued. */
21389 cp_parser_abort_tentative_parse (cp_parser* parser)
21391 gcc_assert (parser->context->status != CP_PARSER_STATUS_KIND_COMMITTED
21392 || errorcount > 0);
21393 cp_parser_simulate_error (parser);
21394 /* Now, pretend that we want to see if the construct was
21395 successfully parsed. */
21396 cp_parser_parse_definitely (parser);
21399 /* Stop parsing tentatively. If a parse error has occurred, restore the
21400 token stream. Otherwise, commit to the tokens we have consumed.
21401 Returns true if no error occurred; false otherwise. */
21404 cp_parser_parse_definitely (cp_parser* parser)
21406 bool error_occurred;
21407 cp_parser_context *context;
21409 /* Remember whether or not an error occurred, since we are about to
21410 destroy that information. */
21411 error_occurred = cp_parser_error_occurred (parser);
21412 /* Remove the topmost context from the stack. */
21413 context = parser->context;
21414 parser->context = context->next;
21415 /* If no parse errors occurred, commit to the tentative parse. */
21416 if (!error_occurred)
21418 /* Commit to the tokens read tentatively, unless that was
21420 if (context->status != CP_PARSER_STATUS_KIND_COMMITTED)
21421 cp_lexer_commit_tokens (parser->lexer);
21423 pop_to_parent_deferring_access_checks ();
21425 /* Otherwise, if errors occurred, roll back our state so that things
21426 are just as they were before we began the tentative parse. */
21429 cp_lexer_rollback_tokens (parser->lexer);
21430 pop_deferring_access_checks ();
21432 /* Add the context to the front of the free list. */
21433 context->next = cp_parser_context_free_list;
21434 cp_parser_context_free_list = context;
21436 return !error_occurred;
21439 /* Returns true if we are parsing tentatively and are not committed to
21440 this tentative parse. */
21443 cp_parser_uncommitted_to_tentative_parse_p (cp_parser* parser)
21445 return (cp_parser_parsing_tentatively (parser)
21446 && parser->context->status != CP_PARSER_STATUS_KIND_COMMITTED);
21449 /* Returns nonzero iff an error has occurred during the most recent
21450 tentative parse. */
21453 cp_parser_error_occurred (cp_parser* parser)
21455 return (cp_parser_parsing_tentatively (parser)
21456 && parser->context->status == CP_PARSER_STATUS_KIND_ERROR);
21459 /* Returns nonzero if GNU extensions are allowed. */
21462 cp_parser_allow_gnu_extensions_p (cp_parser* parser)
21464 return parser->allow_gnu_extensions_p;
21467 /* Objective-C++ Productions */
21470 /* Parse an Objective-C expression, which feeds into a primary-expression
21474 objc-message-expression
21475 objc-string-literal
21476 objc-encode-expression
21477 objc-protocol-expression
21478 objc-selector-expression
21480 Returns a tree representation of the expression. */
21483 cp_parser_objc_expression (cp_parser* parser)
21485 /* Try to figure out what kind of declaration is present. */
21486 cp_token *kwd = cp_lexer_peek_token (parser->lexer);
21490 case CPP_OPEN_SQUARE:
21491 return cp_parser_objc_message_expression (parser);
21493 case CPP_OBJC_STRING:
21494 kwd = cp_lexer_consume_token (parser->lexer);
21495 return objc_build_string_object (kwd->u.value);
21498 switch (kwd->keyword)
21500 case RID_AT_ENCODE:
21501 return cp_parser_objc_encode_expression (parser);
21503 case RID_AT_PROTOCOL:
21504 return cp_parser_objc_protocol_expression (parser);
21506 case RID_AT_SELECTOR:
21507 return cp_parser_objc_selector_expression (parser);
21513 error_at (kwd->location,
21514 "misplaced %<@%D%> Objective-C++ construct",
21516 cp_parser_skip_to_end_of_block_or_statement (parser);
21519 return error_mark_node;
21522 /* Parse an Objective-C message expression.
21524 objc-message-expression:
21525 [ objc-message-receiver objc-message-args ]
21527 Returns a representation of an Objective-C message. */
21530 cp_parser_objc_message_expression (cp_parser* parser)
21532 tree receiver, messageargs;
21534 cp_lexer_consume_token (parser->lexer); /* Eat '['. */
21535 receiver = cp_parser_objc_message_receiver (parser);
21536 messageargs = cp_parser_objc_message_args (parser);
21537 cp_parser_require (parser, CPP_CLOSE_SQUARE, RT_CLOSE_SQUARE);
21539 return objc_build_message_expr (receiver, messageargs);
21542 /* Parse an objc-message-receiver.
21544 objc-message-receiver:
21546 simple-type-specifier
21548 Returns a representation of the type or expression. */
21551 cp_parser_objc_message_receiver (cp_parser* parser)
21555 /* An Objective-C message receiver may be either (1) a type
21556 or (2) an expression. */
21557 cp_parser_parse_tentatively (parser);
21558 rcv = cp_parser_expression (parser, false, NULL);
21560 if (cp_parser_parse_definitely (parser))
21563 rcv = cp_parser_simple_type_specifier (parser,
21564 /*decl_specs=*/NULL,
21565 CP_PARSER_FLAGS_NONE);
21567 return objc_get_class_reference (rcv);
21570 /* Parse the arguments and selectors comprising an Objective-C message.
21575 objc-selector-args , objc-comma-args
21577 objc-selector-args:
21578 objc-selector [opt] : assignment-expression
21579 objc-selector-args objc-selector [opt] : assignment-expression
21582 assignment-expression
21583 objc-comma-args , assignment-expression
21585 Returns a TREE_LIST, with TREE_PURPOSE containing a list of
21586 selector arguments and TREE_VALUE containing a list of comma
21590 cp_parser_objc_message_args (cp_parser* parser)
21592 tree sel_args = NULL_TREE, addl_args = NULL_TREE;
21593 bool maybe_unary_selector_p = true;
21594 cp_token *token = cp_lexer_peek_token (parser->lexer);
21596 while (cp_parser_objc_selector_p (token->type) || token->type == CPP_COLON)
21598 tree selector = NULL_TREE, arg;
21600 if (token->type != CPP_COLON)
21601 selector = cp_parser_objc_selector (parser);
21603 /* Detect if we have a unary selector. */
21604 if (maybe_unary_selector_p
21605 && cp_lexer_next_token_is_not (parser->lexer, CPP_COLON))
21606 return build_tree_list (selector, NULL_TREE);
21608 maybe_unary_selector_p = false;
21609 cp_parser_require (parser, CPP_COLON, RT_COLON);
21610 arg = cp_parser_assignment_expression (parser, false, NULL);
21613 = chainon (sel_args,
21614 build_tree_list (selector, arg));
21616 token = cp_lexer_peek_token (parser->lexer);
21619 /* Handle non-selector arguments, if any. */
21620 while (token->type == CPP_COMMA)
21624 cp_lexer_consume_token (parser->lexer);
21625 arg = cp_parser_assignment_expression (parser, false, NULL);
21628 = chainon (addl_args,
21629 build_tree_list (NULL_TREE, arg));
21631 token = cp_lexer_peek_token (parser->lexer);
21634 if (sel_args == NULL_TREE && addl_args == NULL_TREE)
21636 cp_parser_error (parser, "objective-c++ message argument(s) are expected");
21637 return build_tree_list (error_mark_node, error_mark_node);
21640 return build_tree_list (sel_args, addl_args);
21643 /* Parse an Objective-C encode expression.
21645 objc-encode-expression:
21646 @encode objc-typename
21648 Returns an encoded representation of the type argument. */
21651 cp_parser_objc_encode_expression (cp_parser* parser)
21656 cp_lexer_consume_token (parser->lexer); /* Eat '@encode'. */
21657 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
21658 token = cp_lexer_peek_token (parser->lexer);
21659 type = complete_type (cp_parser_type_id (parser));
21660 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
21664 error_at (token->location,
21665 "%<@encode%> must specify a type as an argument");
21666 return error_mark_node;
21669 /* This happens if we find @encode(T) (where T is a template
21670 typename or something dependent on a template typename) when
21671 parsing a template. In that case, we can't compile it
21672 immediately, but we rather create an AT_ENCODE_EXPR which will
21673 need to be instantiated when the template is used.
21675 if (dependent_type_p (type))
21677 tree value = build_min (AT_ENCODE_EXPR, size_type_node, type);
21678 TREE_READONLY (value) = 1;
21682 return objc_build_encode_expr (type);
21685 /* Parse an Objective-C @defs expression. */
21688 cp_parser_objc_defs_expression (cp_parser *parser)
21692 cp_lexer_consume_token (parser->lexer); /* Eat '@defs'. */
21693 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
21694 name = cp_parser_identifier (parser);
21695 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
21697 return objc_get_class_ivars (name);
21700 /* Parse an Objective-C protocol expression.
21702 objc-protocol-expression:
21703 @protocol ( identifier )
21705 Returns a representation of the protocol expression. */
21708 cp_parser_objc_protocol_expression (cp_parser* parser)
21712 cp_lexer_consume_token (parser->lexer); /* Eat '@protocol'. */
21713 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
21714 proto = cp_parser_identifier (parser);
21715 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
21717 return objc_build_protocol_expr (proto);
21720 /* Parse an Objective-C selector expression.
21722 objc-selector-expression:
21723 @selector ( objc-method-signature )
21725 objc-method-signature:
21731 objc-selector-seq objc-selector :
21733 Returns a representation of the method selector. */
21736 cp_parser_objc_selector_expression (cp_parser* parser)
21738 tree sel_seq = NULL_TREE;
21739 bool maybe_unary_selector_p = true;
21741 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
21743 cp_lexer_consume_token (parser->lexer); /* Eat '@selector'. */
21744 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
21745 token = cp_lexer_peek_token (parser->lexer);
21747 while (cp_parser_objc_selector_p (token->type) || token->type == CPP_COLON
21748 || token->type == CPP_SCOPE)
21750 tree selector = NULL_TREE;
21752 if (token->type != CPP_COLON
21753 || token->type == CPP_SCOPE)
21754 selector = cp_parser_objc_selector (parser);
21756 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COLON)
21757 && cp_lexer_next_token_is_not (parser->lexer, CPP_SCOPE))
21759 /* Detect if we have a unary selector. */
21760 if (maybe_unary_selector_p)
21762 sel_seq = selector;
21763 goto finish_selector;
21767 cp_parser_error (parser, "expected %<:%>");
21770 maybe_unary_selector_p = false;
21771 token = cp_lexer_consume_token (parser->lexer);
21773 if (token->type == CPP_SCOPE)
21776 = chainon (sel_seq,
21777 build_tree_list (selector, NULL_TREE));
21779 = chainon (sel_seq,
21780 build_tree_list (NULL_TREE, NULL_TREE));
21784 = chainon (sel_seq,
21785 build_tree_list (selector, NULL_TREE));
21787 token = cp_lexer_peek_token (parser->lexer);
21791 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
21793 return objc_build_selector_expr (loc, sel_seq);
21796 /* Parse a list of identifiers.
21798 objc-identifier-list:
21800 objc-identifier-list , identifier
21802 Returns a TREE_LIST of identifier nodes. */
21805 cp_parser_objc_identifier_list (cp_parser* parser)
21811 identifier = cp_parser_identifier (parser);
21812 if (identifier == error_mark_node)
21813 return error_mark_node;
21815 list = build_tree_list (NULL_TREE, identifier);
21816 sep = cp_lexer_peek_token (parser->lexer);
21818 while (sep->type == CPP_COMMA)
21820 cp_lexer_consume_token (parser->lexer); /* Eat ','. */
21821 identifier = cp_parser_identifier (parser);
21822 if (identifier == error_mark_node)
21825 list = chainon (list, build_tree_list (NULL_TREE,
21827 sep = cp_lexer_peek_token (parser->lexer);
21833 /* Parse an Objective-C alias declaration.
21835 objc-alias-declaration:
21836 @compatibility_alias identifier identifier ;
21838 This function registers the alias mapping with the Objective-C front end.
21839 It returns nothing. */
21842 cp_parser_objc_alias_declaration (cp_parser* parser)
21846 cp_lexer_consume_token (parser->lexer); /* Eat '@compatibility_alias'. */
21847 alias = cp_parser_identifier (parser);
21848 orig = cp_parser_identifier (parser);
21849 objc_declare_alias (alias, orig);
21850 cp_parser_consume_semicolon_at_end_of_statement (parser);
21853 /* Parse an Objective-C class forward-declaration.
21855 objc-class-declaration:
21856 @class objc-identifier-list ;
21858 The function registers the forward declarations with the Objective-C
21859 front end. It returns nothing. */
21862 cp_parser_objc_class_declaration (cp_parser* parser)
21864 cp_lexer_consume_token (parser->lexer); /* Eat '@class'. */
21869 id = cp_parser_identifier (parser);
21870 if (id == error_mark_node)
21873 objc_declare_class (id);
21875 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
21876 cp_lexer_consume_token (parser->lexer);
21880 cp_parser_consume_semicolon_at_end_of_statement (parser);
21883 /* Parse a list of Objective-C protocol references.
21885 objc-protocol-refs-opt:
21886 objc-protocol-refs [opt]
21888 objc-protocol-refs:
21889 < objc-identifier-list >
21891 Returns a TREE_LIST of identifiers, if any. */
21894 cp_parser_objc_protocol_refs_opt (cp_parser* parser)
21896 tree protorefs = NULL_TREE;
21898 if(cp_lexer_next_token_is (parser->lexer, CPP_LESS))
21900 cp_lexer_consume_token (parser->lexer); /* Eat '<'. */
21901 protorefs = cp_parser_objc_identifier_list (parser);
21902 cp_parser_require (parser, CPP_GREATER, RT_GREATER);
21908 /* Parse a Objective-C visibility specification. */
21911 cp_parser_objc_visibility_spec (cp_parser* parser)
21913 cp_token *vis = cp_lexer_peek_token (parser->lexer);
21915 switch (vis->keyword)
21917 case RID_AT_PRIVATE:
21918 objc_set_visibility (OBJC_IVAR_VIS_PRIVATE);
21920 case RID_AT_PROTECTED:
21921 objc_set_visibility (OBJC_IVAR_VIS_PROTECTED);
21923 case RID_AT_PUBLIC:
21924 objc_set_visibility (OBJC_IVAR_VIS_PUBLIC);
21926 case RID_AT_PACKAGE:
21927 objc_set_visibility (OBJC_IVAR_VIS_PACKAGE);
21933 /* Eat '@private'/'@protected'/'@public'. */
21934 cp_lexer_consume_token (parser->lexer);
21937 /* Parse an Objective-C method type. Return 'true' if it is a class
21938 (+) method, and 'false' if it is an instance (-) method. */
21941 cp_parser_objc_method_type (cp_parser* parser)
21943 if (cp_lexer_consume_token (parser->lexer)->type == CPP_PLUS)
21949 /* Parse an Objective-C protocol qualifier. */
21952 cp_parser_objc_protocol_qualifiers (cp_parser* parser)
21954 tree quals = NULL_TREE, node;
21955 cp_token *token = cp_lexer_peek_token (parser->lexer);
21957 node = token->u.value;
21959 while (node && TREE_CODE (node) == IDENTIFIER_NODE
21960 && (node == ridpointers [(int) RID_IN]
21961 || node == ridpointers [(int) RID_OUT]
21962 || node == ridpointers [(int) RID_INOUT]
21963 || node == ridpointers [(int) RID_BYCOPY]
21964 || node == ridpointers [(int) RID_BYREF]
21965 || node == ridpointers [(int) RID_ONEWAY]))
21967 quals = tree_cons (NULL_TREE, node, quals);
21968 cp_lexer_consume_token (parser->lexer);
21969 token = cp_lexer_peek_token (parser->lexer);
21970 node = token->u.value;
21976 /* Parse an Objective-C typename. */
21979 cp_parser_objc_typename (cp_parser* parser)
21981 tree type_name = NULL_TREE;
21983 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
21985 tree proto_quals, cp_type = NULL_TREE;
21987 cp_lexer_consume_token (parser->lexer); /* Eat '('. */
21988 proto_quals = cp_parser_objc_protocol_qualifiers (parser);
21990 /* An ObjC type name may consist of just protocol qualifiers, in which
21991 case the type shall default to 'id'. */
21992 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN))
21994 cp_type = cp_parser_type_id (parser);
21996 /* If the type could not be parsed, an error has already
21997 been produced. For error recovery, behave as if it had
21998 not been specified, which will use the default type
22000 if (cp_type == error_mark_node)
22002 cp_type = NULL_TREE;
22003 /* We need to skip to the closing parenthesis as
22004 cp_parser_type_id() does not seem to do it for
22006 cp_parser_skip_to_closing_parenthesis (parser,
22007 /*recovering=*/true,
22008 /*or_comma=*/false,
22009 /*consume_paren=*/false);
22013 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
22014 type_name = build_tree_list (proto_quals, cp_type);
22020 /* Check to see if TYPE refers to an Objective-C selector name. */
22023 cp_parser_objc_selector_p (enum cpp_ttype type)
22025 return (type == CPP_NAME || type == CPP_KEYWORD
22026 || type == CPP_AND_AND || type == CPP_AND_EQ || type == CPP_AND
22027 || type == CPP_OR || type == CPP_COMPL || type == CPP_NOT
22028 || type == CPP_NOT_EQ || type == CPP_OR_OR || type == CPP_OR_EQ
22029 || type == CPP_XOR || type == CPP_XOR_EQ);
22032 /* Parse an Objective-C selector. */
22035 cp_parser_objc_selector (cp_parser* parser)
22037 cp_token *token = cp_lexer_consume_token (parser->lexer);
22039 if (!cp_parser_objc_selector_p (token->type))
22041 error_at (token->location, "invalid Objective-C++ selector name");
22042 return error_mark_node;
22045 /* C++ operator names are allowed to appear in ObjC selectors. */
22046 switch (token->type)
22048 case CPP_AND_AND: return get_identifier ("and");
22049 case CPP_AND_EQ: return get_identifier ("and_eq");
22050 case CPP_AND: return get_identifier ("bitand");
22051 case CPP_OR: return get_identifier ("bitor");
22052 case CPP_COMPL: return get_identifier ("compl");
22053 case CPP_NOT: return get_identifier ("not");
22054 case CPP_NOT_EQ: return get_identifier ("not_eq");
22055 case CPP_OR_OR: return get_identifier ("or");
22056 case CPP_OR_EQ: return get_identifier ("or_eq");
22057 case CPP_XOR: return get_identifier ("xor");
22058 case CPP_XOR_EQ: return get_identifier ("xor_eq");
22059 default: return token->u.value;
22063 /* Parse an Objective-C params list. */
22066 cp_parser_objc_method_keyword_params (cp_parser* parser, tree* attributes)
22068 tree params = NULL_TREE;
22069 bool maybe_unary_selector_p = true;
22070 cp_token *token = cp_lexer_peek_token (parser->lexer);
22072 while (cp_parser_objc_selector_p (token->type) || token->type == CPP_COLON)
22074 tree selector = NULL_TREE, type_name, identifier;
22075 tree parm_attr = NULL_TREE;
22077 if (token->keyword == RID_ATTRIBUTE)
22080 if (token->type != CPP_COLON)
22081 selector = cp_parser_objc_selector (parser);
22083 /* Detect if we have a unary selector. */
22084 if (maybe_unary_selector_p
22085 && cp_lexer_next_token_is_not (parser->lexer, CPP_COLON))
22087 params = selector; /* Might be followed by attributes. */
22091 maybe_unary_selector_p = false;
22092 if (!cp_parser_require (parser, CPP_COLON, RT_COLON))
22094 /* Something went quite wrong. There should be a colon
22095 here, but there is not. Stop parsing parameters. */
22098 type_name = cp_parser_objc_typename (parser);
22099 /* New ObjC allows attributes on parameters too. */
22100 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_ATTRIBUTE))
22101 parm_attr = cp_parser_attributes_opt (parser);
22102 identifier = cp_parser_identifier (parser);
22106 objc_build_keyword_decl (selector,
22111 token = cp_lexer_peek_token (parser->lexer);
22114 if (params == NULL_TREE)
22116 cp_parser_error (parser, "objective-c++ method declaration is expected");
22117 return error_mark_node;
22120 /* We allow tail attributes for the method. */
22121 if (token->keyword == RID_ATTRIBUTE)
22123 *attributes = cp_parser_attributes_opt (parser);
22124 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)
22125 || cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
22127 cp_parser_error (parser,
22128 "method attributes must be specified at the end");
22129 return error_mark_node;
22132 if (params == NULL_TREE)
22134 cp_parser_error (parser, "objective-c++ method declaration is expected");
22135 return error_mark_node;
22140 /* Parse the non-keyword Objective-C params. */
22143 cp_parser_objc_method_tail_params_opt (cp_parser* parser, bool *ellipsisp,
22146 tree params = make_node (TREE_LIST);
22147 cp_token *token = cp_lexer_peek_token (parser->lexer);
22148 *ellipsisp = false; /* Initially, assume no ellipsis. */
22150 while (token->type == CPP_COMMA)
22152 cp_parameter_declarator *parmdecl;
22155 cp_lexer_consume_token (parser->lexer); /* Eat ','. */
22156 token = cp_lexer_peek_token (parser->lexer);
22158 if (token->type == CPP_ELLIPSIS)
22160 cp_lexer_consume_token (parser->lexer); /* Eat '...'. */
22162 token = cp_lexer_peek_token (parser->lexer);
22166 /* TODO: parse attributes for tail parameters. */
22167 parmdecl = cp_parser_parameter_declaration (parser, false, NULL);
22168 parm = grokdeclarator (parmdecl->declarator,
22169 &parmdecl->decl_specifiers,
22170 PARM, /*initialized=*/0,
22171 /*attrlist=*/NULL);
22173 chainon (params, build_tree_list (NULL_TREE, parm));
22174 token = cp_lexer_peek_token (parser->lexer);
22177 /* We allow tail attributes for the method. */
22178 if (token->keyword == RID_ATTRIBUTE)
22180 if (*attributes == NULL_TREE)
22182 *attributes = cp_parser_attributes_opt (parser);
22183 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)
22184 || cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
22188 /* We have an error, but parse the attributes, so that we can
22190 *attributes = cp_parser_attributes_opt (parser);
22192 cp_parser_error (parser,
22193 "method attributes must be specified at the end");
22194 return error_mark_node;
22200 /* Parse a linkage specification, a pragma, an extra semicolon or a block. */
22203 cp_parser_objc_interstitial_code (cp_parser* parser)
22205 cp_token *token = cp_lexer_peek_token (parser->lexer);
22207 /* If the next token is `extern' and the following token is a string
22208 literal, then we have a linkage specification. */
22209 if (token->keyword == RID_EXTERN
22210 && cp_parser_is_string_literal (cp_lexer_peek_nth_token (parser->lexer, 2)))
22211 cp_parser_linkage_specification (parser);
22212 /* Handle #pragma, if any. */
22213 else if (token->type == CPP_PRAGMA)
22214 cp_parser_pragma (parser, pragma_external);
22215 /* Allow stray semicolons. */
22216 else if (token->type == CPP_SEMICOLON)
22217 cp_lexer_consume_token (parser->lexer);
22218 /* Mark methods as optional or required, when building protocols. */
22219 else if (token->keyword == RID_AT_OPTIONAL)
22221 cp_lexer_consume_token (parser->lexer);
22222 objc_set_method_opt (true);
22224 else if (token->keyword == RID_AT_REQUIRED)
22226 cp_lexer_consume_token (parser->lexer);
22227 objc_set_method_opt (false);
22229 else if (token->keyword == RID_NAMESPACE)
22230 cp_parser_namespace_definition (parser);
22231 /* Other stray characters must generate errors. */
22232 else if (token->type == CPP_OPEN_BRACE || token->type == CPP_CLOSE_BRACE)
22234 cp_lexer_consume_token (parser->lexer);
22235 error ("stray %qs between Objective-C++ methods",
22236 token->type == CPP_OPEN_BRACE ? "{" : "}");
22238 /* Finally, try to parse a block-declaration, or a function-definition. */
22240 cp_parser_block_declaration (parser, /*statement_p=*/false);
22243 /* Parse a method signature. */
22246 cp_parser_objc_method_signature (cp_parser* parser, tree* attributes)
22248 tree rettype, kwdparms, optparms;
22249 bool ellipsis = false;
22250 bool is_class_method;
22252 is_class_method = cp_parser_objc_method_type (parser);
22253 rettype = cp_parser_objc_typename (parser);
22254 *attributes = NULL_TREE;
22255 kwdparms = cp_parser_objc_method_keyword_params (parser, attributes);
22256 if (kwdparms == error_mark_node)
22257 return error_mark_node;
22258 optparms = cp_parser_objc_method_tail_params_opt (parser, &ellipsis, attributes);
22259 if (optparms == error_mark_node)
22260 return error_mark_node;
22262 return objc_build_method_signature (is_class_method, rettype, kwdparms, optparms, ellipsis);
22266 cp_parser_objc_method_maybe_bad_prefix_attributes (cp_parser* parser)
22269 cp_lexer_save_tokens (parser->lexer);
22270 tattr = cp_parser_attributes_opt (parser);
22271 gcc_assert (tattr) ;
22273 /* If the attributes are followed by a method introducer, this is not allowed.
22274 Dump the attributes and flag the situation. */
22275 if (cp_lexer_next_token_is (parser->lexer, CPP_PLUS)
22276 || cp_lexer_next_token_is (parser->lexer, CPP_MINUS))
22279 /* Otherwise, the attributes introduce some interstitial code, possibly so
22280 rewind to allow that check. */
22281 cp_lexer_rollback_tokens (parser->lexer);
22285 /* Parse an Objective-C method prototype list. */
22288 cp_parser_objc_method_prototype_list (cp_parser* parser)
22290 cp_token *token = cp_lexer_peek_token (parser->lexer);
22292 while (token->keyword != RID_AT_END && token->type != CPP_EOF)
22294 if (token->type == CPP_PLUS || token->type == CPP_MINUS)
22296 tree attributes, sig;
22297 bool is_class_method;
22298 if (token->type == CPP_PLUS)
22299 is_class_method = true;
22301 is_class_method = false;
22302 sig = cp_parser_objc_method_signature (parser, &attributes);
22303 if (sig == error_mark_node)
22305 cp_parser_skip_to_end_of_block_or_statement (parser);
22306 token = cp_lexer_peek_token (parser->lexer);
22309 objc_add_method_declaration (is_class_method, sig, attributes);
22310 cp_parser_consume_semicolon_at_end_of_statement (parser);
22312 else if (token->keyword == RID_AT_PROPERTY)
22313 cp_parser_objc_at_property_declaration (parser);
22314 else if (token->keyword == RID_ATTRIBUTE
22315 && cp_parser_objc_method_maybe_bad_prefix_attributes(parser))
22316 warning_at (cp_lexer_peek_token (parser->lexer)->location,
22318 "prefix attributes are ignored for methods");
22320 /* Allow for interspersed non-ObjC++ code. */
22321 cp_parser_objc_interstitial_code (parser);
22323 token = cp_lexer_peek_token (parser->lexer);
22326 if (token->type != CPP_EOF)
22327 cp_lexer_consume_token (parser->lexer); /* Eat '@end'. */
22329 cp_parser_error (parser, "expected %<@end%>");
22331 objc_finish_interface ();
22334 /* Parse an Objective-C method definition list. */
22337 cp_parser_objc_method_definition_list (cp_parser* parser)
22339 cp_token *token = cp_lexer_peek_token (parser->lexer);
22341 while (token->keyword != RID_AT_END && token->type != CPP_EOF)
22345 if (token->type == CPP_PLUS || token->type == CPP_MINUS)
22348 tree sig, attribute;
22349 bool is_class_method;
22350 if (token->type == CPP_PLUS)
22351 is_class_method = true;
22353 is_class_method = false;
22354 push_deferring_access_checks (dk_deferred);
22355 sig = cp_parser_objc_method_signature (parser, &attribute);
22356 if (sig == error_mark_node)
22358 cp_parser_skip_to_end_of_block_or_statement (parser);
22359 token = cp_lexer_peek_token (parser->lexer);
22362 objc_start_method_definition (is_class_method, sig, attribute,
22365 /* For historical reasons, we accept an optional semicolon. */
22366 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
22367 cp_lexer_consume_token (parser->lexer);
22369 ptk = cp_lexer_peek_token (parser->lexer);
22370 if (!(ptk->type == CPP_PLUS || ptk->type == CPP_MINUS
22371 || ptk->type == CPP_EOF || ptk->keyword == RID_AT_END))
22373 perform_deferred_access_checks ();
22374 stop_deferring_access_checks ();
22375 meth = cp_parser_function_definition_after_declarator (parser,
22377 pop_deferring_access_checks ();
22378 objc_finish_method_definition (meth);
22381 /* The following case will be removed once @synthesize is
22382 completely implemented. */
22383 else if (token->keyword == RID_AT_PROPERTY)
22384 cp_parser_objc_at_property_declaration (parser);
22385 else if (token->keyword == RID_AT_SYNTHESIZE)
22386 cp_parser_objc_at_synthesize_declaration (parser);
22387 else if (token->keyword == RID_AT_DYNAMIC)
22388 cp_parser_objc_at_dynamic_declaration (parser);
22389 else if (token->keyword == RID_ATTRIBUTE
22390 && cp_parser_objc_method_maybe_bad_prefix_attributes(parser))
22391 warning_at (token->location, OPT_Wattributes,
22392 "prefix attributes are ignored for methods");
22394 /* Allow for interspersed non-ObjC++ code. */
22395 cp_parser_objc_interstitial_code (parser);
22397 token = cp_lexer_peek_token (parser->lexer);
22400 if (token->type != CPP_EOF)
22401 cp_lexer_consume_token (parser->lexer); /* Eat '@end'. */
22403 cp_parser_error (parser, "expected %<@end%>");
22405 objc_finish_implementation ();
22408 /* Parse Objective-C ivars. */
22411 cp_parser_objc_class_ivars (cp_parser* parser)
22413 cp_token *token = cp_lexer_peek_token (parser->lexer);
22415 if (token->type != CPP_OPEN_BRACE)
22416 return; /* No ivars specified. */
22418 cp_lexer_consume_token (parser->lexer); /* Eat '{'. */
22419 token = cp_lexer_peek_token (parser->lexer);
22421 while (token->type != CPP_CLOSE_BRACE
22422 && token->keyword != RID_AT_END && token->type != CPP_EOF)
22424 cp_decl_specifier_seq declspecs;
22425 int decl_class_or_enum_p;
22426 tree prefix_attributes;
22428 cp_parser_objc_visibility_spec (parser);
22430 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
22433 cp_parser_decl_specifier_seq (parser,
22434 CP_PARSER_FLAGS_OPTIONAL,
22436 &decl_class_or_enum_p);
22438 /* auto, register, static, extern, mutable. */
22439 if (declspecs.storage_class != sc_none)
22441 cp_parser_error (parser, "invalid type for instance variable");
22442 declspecs.storage_class = sc_none;
22446 if (declspecs.specs[(int) ds_thread])
22448 cp_parser_error (parser, "invalid type for instance variable");
22449 declspecs.specs[(int) ds_thread] = 0;
22453 if (declspecs.specs[(int) ds_typedef])
22455 cp_parser_error (parser, "invalid type for instance variable");
22456 declspecs.specs[(int) ds_typedef] = 0;
22459 prefix_attributes = declspecs.attributes;
22460 declspecs.attributes = NULL_TREE;
22462 /* Keep going until we hit the `;' at the end of the
22464 while (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
22466 tree width = NULL_TREE, attributes, first_attribute, decl;
22467 cp_declarator *declarator = NULL;
22468 int ctor_dtor_or_conv_p;
22470 /* Check for a (possibly unnamed) bitfield declaration. */
22471 token = cp_lexer_peek_token (parser->lexer);
22472 if (token->type == CPP_COLON)
22475 if (token->type == CPP_NAME
22476 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
22479 /* Get the name of the bitfield. */
22480 declarator = make_id_declarator (NULL_TREE,
22481 cp_parser_identifier (parser),
22485 cp_lexer_consume_token (parser->lexer); /* Eat ':'. */
22486 /* Get the width of the bitfield. */
22488 = cp_parser_constant_expression (parser,
22489 /*allow_non_constant=*/false,
22494 /* Parse the declarator. */
22496 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
22497 &ctor_dtor_or_conv_p,
22498 /*parenthesized_p=*/NULL,
22499 /*member_p=*/false);
22502 /* Look for attributes that apply to the ivar. */
22503 attributes = cp_parser_attributes_opt (parser);
22504 /* Remember which attributes are prefix attributes and
22506 first_attribute = attributes;
22507 /* Combine the attributes. */
22508 attributes = chainon (prefix_attributes, attributes);
22511 /* Create the bitfield declaration. */
22512 decl = grokbitfield (declarator, &declspecs,
22516 decl = grokfield (declarator, &declspecs,
22517 NULL_TREE, /*init_const_expr_p=*/false,
22518 NULL_TREE, attributes);
22520 /* Add the instance variable. */
22521 if (decl != error_mark_node && decl != NULL_TREE)
22522 objc_add_instance_variable (decl);
22524 /* Reset PREFIX_ATTRIBUTES. */
22525 while (attributes && TREE_CHAIN (attributes) != first_attribute)
22526 attributes = TREE_CHAIN (attributes);
22528 TREE_CHAIN (attributes) = NULL_TREE;
22530 token = cp_lexer_peek_token (parser->lexer);
22532 if (token->type == CPP_COMMA)
22534 cp_lexer_consume_token (parser->lexer); /* Eat ','. */
22540 cp_parser_consume_semicolon_at_end_of_statement (parser);
22541 token = cp_lexer_peek_token (parser->lexer);
22544 if (token->keyword == RID_AT_END)
22545 cp_parser_error (parser, "expected %<}%>");
22547 /* Do not consume the RID_AT_END, so it will be read again as terminating
22548 the @interface of @implementation. */
22549 if (token->keyword != RID_AT_END && token->type != CPP_EOF)
22550 cp_lexer_consume_token (parser->lexer); /* Eat '}'. */
22552 /* For historical reasons, we accept an optional semicolon. */
22553 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
22554 cp_lexer_consume_token (parser->lexer);
22557 /* Parse an Objective-C protocol declaration. */
22560 cp_parser_objc_protocol_declaration (cp_parser* parser, tree attributes)
22562 tree proto, protorefs;
22565 cp_lexer_consume_token (parser->lexer); /* Eat '@protocol'. */
22566 if (cp_lexer_next_token_is_not (parser->lexer, CPP_NAME))
22568 tok = cp_lexer_peek_token (parser->lexer);
22569 error_at (tok->location, "identifier expected after %<@protocol%>");
22570 cp_parser_consume_semicolon_at_end_of_statement (parser);
22574 /* See if we have a forward declaration or a definition. */
22575 tok = cp_lexer_peek_nth_token (parser->lexer, 2);
22577 /* Try a forward declaration first. */
22578 if (tok->type == CPP_COMMA || tok->type == CPP_SEMICOLON)
22584 id = cp_parser_identifier (parser);
22585 if (id == error_mark_node)
22588 objc_declare_protocol (id, attributes);
22590 if(cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
22591 cp_lexer_consume_token (parser->lexer);
22595 cp_parser_consume_semicolon_at_end_of_statement (parser);
22598 /* Ok, we got a full-fledged definition (or at least should). */
22601 proto = cp_parser_identifier (parser);
22602 protorefs = cp_parser_objc_protocol_refs_opt (parser);
22603 objc_start_protocol (proto, protorefs, attributes);
22604 cp_parser_objc_method_prototype_list (parser);
22608 /* Parse an Objective-C superclass or category. */
22611 cp_parser_objc_superclass_or_category (cp_parser *parser,
22614 tree *categ, bool *is_class_extension)
22616 cp_token *next = cp_lexer_peek_token (parser->lexer);
22618 *super = *categ = NULL_TREE;
22619 *is_class_extension = false;
22620 if (next->type == CPP_COLON)
22622 cp_lexer_consume_token (parser->lexer); /* Eat ':'. */
22623 *super = cp_parser_identifier (parser);
22625 else if (next->type == CPP_OPEN_PAREN)
22627 cp_lexer_consume_token (parser->lexer); /* Eat '('. */
22629 /* If there is no category name, and this is an @interface, we
22630 have a class extension. */
22631 if (iface_p && cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_PAREN))
22633 *categ = NULL_TREE;
22634 *is_class_extension = true;
22637 *categ = cp_parser_identifier (parser);
22639 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
22643 /* Parse an Objective-C class interface. */
22646 cp_parser_objc_class_interface (cp_parser* parser, tree attributes)
22648 tree name, super, categ, protos;
22649 bool is_class_extension;
22651 cp_lexer_consume_token (parser->lexer); /* Eat '@interface'. */
22652 name = cp_parser_identifier (parser);
22653 if (name == error_mark_node)
22655 /* It's hard to recover because even if valid @interface stuff
22656 is to follow, we can't compile it (or validate it) if we
22657 don't even know which class it refers to. Let's assume this
22658 was a stray '@interface' token in the stream and skip it.
22662 cp_parser_objc_superclass_or_category (parser, true, &super, &categ,
22663 &is_class_extension);
22664 protos = cp_parser_objc_protocol_refs_opt (parser);
22666 /* We have either a class or a category on our hands. */
22667 if (categ || is_class_extension)
22668 objc_start_category_interface (name, categ, protos, attributes);
22671 objc_start_class_interface (name, super, protos, attributes);
22672 /* Handle instance variable declarations, if any. */
22673 cp_parser_objc_class_ivars (parser);
22674 objc_continue_interface ();
22677 cp_parser_objc_method_prototype_list (parser);
22680 /* Parse an Objective-C class implementation. */
22683 cp_parser_objc_class_implementation (cp_parser* parser)
22685 tree name, super, categ;
22686 bool is_class_extension;
22688 cp_lexer_consume_token (parser->lexer); /* Eat '@implementation'. */
22689 name = cp_parser_identifier (parser);
22690 if (name == error_mark_node)
22692 /* It's hard to recover because even if valid @implementation
22693 stuff is to follow, we can't compile it (or validate it) if
22694 we don't even know which class it refers to. Let's assume
22695 this was a stray '@implementation' token in the stream and
22700 cp_parser_objc_superclass_or_category (parser, false, &super, &categ,
22701 &is_class_extension);
22703 /* We have either a class or a category on our hands. */
22705 objc_start_category_implementation (name, categ);
22708 objc_start_class_implementation (name, super);
22709 /* Handle instance variable declarations, if any. */
22710 cp_parser_objc_class_ivars (parser);
22711 objc_continue_implementation ();
22714 cp_parser_objc_method_definition_list (parser);
22717 /* Consume the @end token and finish off the implementation. */
22720 cp_parser_objc_end_implementation (cp_parser* parser)
22722 cp_lexer_consume_token (parser->lexer); /* Eat '@end'. */
22723 objc_finish_implementation ();
22726 /* Parse an Objective-C declaration. */
22729 cp_parser_objc_declaration (cp_parser* parser, tree attributes)
22731 /* Try to figure out what kind of declaration is present. */
22732 cp_token *kwd = cp_lexer_peek_token (parser->lexer);
22735 switch (kwd->keyword)
22740 error_at (kwd->location, "attributes may not be specified before"
22741 " the %<@%D%> Objective-C++ keyword",
22745 case RID_AT_IMPLEMENTATION:
22746 warning_at (kwd->location, OPT_Wattributes,
22747 "prefix attributes are ignored before %<@%D%>",
22754 switch (kwd->keyword)
22757 cp_parser_objc_alias_declaration (parser);
22760 cp_parser_objc_class_declaration (parser);
22762 case RID_AT_PROTOCOL:
22763 cp_parser_objc_protocol_declaration (parser, attributes);
22765 case RID_AT_INTERFACE:
22766 cp_parser_objc_class_interface (parser, attributes);
22768 case RID_AT_IMPLEMENTATION:
22769 cp_parser_objc_class_implementation (parser);
22772 cp_parser_objc_end_implementation (parser);
22775 error_at (kwd->location, "misplaced %<@%D%> Objective-C++ construct",
22777 cp_parser_skip_to_end_of_block_or_statement (parser);
22781 /* Parse an Objective-C try-catch-finally statement.
22783 objc-try-catch-finally-stmt:
22784 @try compound-statement objc-catch-clause-seq [opt]
22785 objc-finally-clause [opt]
22787 objc-catch-clause-seq:
22788 objc-catch-clause objc-catch-clause-seq [opt]
22791 @catch ( objc-exception-declaration ) compound-statement
22793 objc-finally-clause:
22794 @finally compound-statement
22796 objc-exception-declaration:
22797 parameter-declaration
22800 where '...' is to be interpreted literally, that is, it means CPP_ELLIPSIS.
22804 PS: This function is identical to c_parser_objc_try_catch_finally_statement
22805 for C. Keep them in sync. */
22808 cp_parser_objc_try_catch_finally_statement (cp_parser *parser)
22810 location_t location;
22813 cp_parser_require_keyword (parser, RID_AT_TRY, RT_AT_TRY);
22814 location = cp_lexer_peek_token (parser->lexer)->location;
22815 objc_maybe_warn_exceptions (location);
22816 /* NB: The @try block needs to be wrapped in its own STATEMENT_LIST
22817 node, lest it get absorbed into the surrounding block. */
22818 stmt = push_stmt_list ();
22819 cp_parser_compound_statement (parser, NULL, false, false);
22820 objc_begin_try_stmt (location, pop_stmt_list (stmt));
22822 while (cp_lexer_next_token_is_keyword (parser->lexer, RID_AT_CATCH))
22824 cp_parameter_declarator *parm;
22825 tree parameter_declaration = error_mark_node;
22826 bool seen_open_paren = false;
22828 cp_lexer_consume_token (parser->lexer);
22829 if (cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
22830 seen_open_paren = true;
22831 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
22833 /* We have "@catch (...)" (where the '...' are literally
22834 what is in the code). Skip the '...'.
22835 parameter_declaration is set to NULL_TREE, and
22836 objc_being_catch_clauses() knows that that means
22838 cp_lexer_consume_token (parser->lexer);
22839 parameter_declaration = NULL_TREE;
22843 /* We have "@catch (NSException *exception)" or something
22844 like that. Parse the parameter declaration. */
22845 parm = cp_parser_parameter_declaration (parser, false, NULL);
22847 parameter_declaration = error_mark_node;
22849 parameter_declaration = grokdeclarator (parm->declarator,
22850 &parm->decl_specifiers,
22851 PARM, /*initialized=*/0,
22852 /*attrlist=*/NULL);
22854 if (seen_open_paren)
22855 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
22858 /* If there was no open parenthesis, we are recovering from
22859 an error, and we are trying to figure out what mistake
22860 the user has made. */
22862 /* If there is an immediate closing parenthesis, the user
22863 probably forgot the opening one (ie, they typed "@catch
22864 NSException *e)". Parse the closing parenthesis and keep
22866 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_PAREN))
22867 cp_lexer_consume_token (parser->lexer);
22869 /* If these is no immediate closing parenthesis, the user
22870 probably doesn't know that parenthesis are required at
22871 all (ie, they typed "@catch NSException *e"). So, just
22872 forget about the closing parenthesis and keep going. */
22874 objc_begin_catch_clause (parameter_declaration);
22875 cp_parser_compound_statement (parser, NULL, false, false);
22876 objc_finish_catch_clause ();
22878 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_AT_FINALLY))
22880 cp_lexer_consume_token (parser->lexer);
22881 location = cp_lexer_peek_token (parser->lexer)->location;
22882 /* NB: The @finally block needs to be wrapped in its own STATEMENT_LIST
22883 node, lest it get absorbed into the surrounding block. */
22884 stmt = push_stmt_list ();
22885 cp_parser_compound_statement (parser, NULL, false, false);
22886 objc_build_finally_clause (location, pop_stmt_list (stmt));
22889 return objc_finish_try_stmt ();
22892 /* Parse an Objective-C synchronized statement.
22894 objc-synchronized-stmt:
22895 @synchronized ( expression ) compound-statement
22897 Returns NULL_TREE. */
22900 cp_parser_objc_synchronized_statement (cp_parser *parser)
22902 location_t location;
22905 cp_parser_require_keyword (parser, RID_AT_SYNCHRONIZED, RT_AT_SYNCHRONIZED);
22907 location = cp_lexer_peek_token (parser->lexer)->location;
22908 objc_maybe_warn_exceptions (location);
22909 cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN);
22910 lock = cp_parser_expression (parser, false, NULL);
22911 cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
22913 /* NB: The @synchronized block needs to be wrapped in its own STATEMENT_LIST
22914 node, lest it get absorbed into the surrounding block. */
22915 stmt = push_stmt_list ();
22916 cp_parser_compound_statement (parser, NULL, false, false);
22918 return objc_build_synchronized (location, lock, pop_stmt_list (stmt));
22921 /* Parse an Objective-C throw statement.
22924 @throw assignment-expression [opt] ;
22926 Returns a constructed '@throw' statement. */
22929 cp_parser_objc_throw_statement (cp_parser *parser)
22931 tree expr = NULL_TREE;
22932 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
22934 cp_parser_require_keyword (parser, RID_AT_THROW, RT_AT_THROW);
22936 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
22937 expr = cp_parser_expression (parser, /*cast_p=*/false, NULL);
22939 cp_parser_consume_semicolon_at_end_of_statement (parser);
22941 return objc_build_throw_stmt (loc, expr);
22944 /* Parse an Objective-C statement. */
22947 cp_parser_objc_statement (cp_parser * parser)
22949 /* Try to figure out what kind of declaration is present. */
22950 cp_token *kwd = cp_lexer_peek_token (parser->lexer);
22952 switch (kwd->keyword)
22955 return cp_parser_objc_try_catch_finally_statement (parser);
22956 case RID_AT_SYNCHRONIZED:
22957 return cp_parser_objc_synchronized_statement (parser);
22959 return cp_parser_objc_throw_statement (parser);
22961 error_at (kwd->location, "misplaced %<@%D%> Objective-C++ construct",
22963 cp_parser_skip_to_end_of_block_or_statement (parser);
22966 return error_mark_node;
22969 /* If we are compiling ObjC++ and we see an __attribute__ we neeed to
22970 look ahead to see if an objc keyword follows the attributes. This
22971 is to detect the use of prefix attributes on ObjC @interface and
22975 cp_parser_objc_valid_prefix_attributes (cp_parser* parser, tree *attrib)
22977 cp_lexer_save_tokens (parser->lexer);
22978 *attrib = cp_parser_attributes_opt (parser);
22979 gcc_assert (*attrib);
22980 if (OBJC_IS_AT_KEYWORD (cp_lexer_peek_token (parser->lexer)->keyword))
22982 cp_lexer_commit_tokens (parser->lexer);
22985 cp_lexer_rollback_tokens (parser->lexer);
22989 /* This routine is a minimal replacement for
22990 c_parser_struct_declaration () used when parsing the list of
22991 types/names or ObjC++ properties. For example, when parsing the
22994 @property (readonly) int a, b, c;
22996 this function is responsible for parsing "int a, int b, int c" and
22997 returning the declarations as CHAIN of DECLs.
22999 TODO: Share this code with cp_parser_objc_class_ivars. It's very
23000 similar parsing. */
23002 cp_parser_objc_struct_declaration (cp_parser *parser)
23004 tree decls = NULL_TREE;
23005 cp_decl_specifier_seq declspecs;
23006 int decl_class_or_enum_p;
23007 tree prefix_attributes;
23009 cp_parser_decl_specifier_seq (parser,
23010 CP_PARSER_FLAGS_NONE,
23012 &decl_class_or_enum_p);
23014 if (declspecs.type == error_mark_node)
23015 return error_mark_node;
23017 /* auto, register, static, extern, mutable. */
23018 if (declspecs.storage_class != sc_none)
23020 cp_parser_error (parser, "invalid type for property");
23021 declspecs.storage_class = sc_none;
23025 if (declspecs.specs[(int) ds_thread])
23027 cp_parser_error (parser, "invalid type for property");
23028 declspecs.specs[(int) ds_thread] = 0;
23032 if (declspecs.specs[(int) ds_typedef])
23034 cp_parser_error (parser, "invalid type for property");
23035 declspecs.specs[(int) ds_typedef] = 0;
23038 prefix_attributes = declspecs.attributes;
23039 declspecs.attributes = NULL_TREE;
23041 /* Keep going until we hit the `;' at the end of the declaration. */
23042 while (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
23044 tree attributes, first_attribute, decl;
23045 cp_declarator *declarator;
23048 /* Parse the declarator. */
23049 declarator = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
23050 NULL, NULL, false);
23052 /* Look for attributes that apply to the ivar. */
23053 attributes = cp_parser_attributes_opt (parser);
23054 /* Remember which attributes are prefix attributes and
23056 first_attribute = attributes;
23057 /* Combine the attributes. */
23058 attributes = chainon (prefix_attributes, attributes);
23060 decl = grokfield (declarator, &declspecs,
23061 NULL_TREE, /*init_const_expr_p=*/false,
23062 NULL_TREE, attributes);
23064 if (decl == error_mark_node || decl == NULL_TREE)
23065 return error_mark_node;
23067 /* Reset PREFIX_ATTRIBUTES. */
23068 while (attributes && TREE_CHAIN (attributes) != first_attribute)
23069 attributes = TREE_CHAIN (attributes);
23071 TREE_CHAIN (attributes) = NULL_TREE;
23073 DECL_CHAIN (decl) = decls;
23076 token = cp_lexer_peek_token (parser->lexer);
23077 if (token->type == CPP_COMMA)
23079 cp_lexer_consume_token (parser->lexer); /* Eat ','. */
23088 /* Parse an Objective-C @property declaration. The syntax is:
23090 objc-property-declaration:
23091 '@property' objc-property-attributes[opt] struct-declaration ;
23093 objc-property-attributes:
23094 '(' objc-property-attribute-list ')'
23096 objc-property-attribute-list:
23097 objc-property-attribute
23098 objc-property-attribute-list, objc-property-attribute
23100 objc-property-attribute
23101 'getter' = identifier
23102 'setter' = identifier
23111 @property NSString *name;
23112 @property (readonly) id object;
23113 @property (retain, nonatomic, getter=getTheName) id name;
23114 @property int a, b, c;
23116 PS: This function is identical to
23117 c_parser_objc_at_property_declaration for C. Keep them in sync. */
23119 cp_parser_objc_at_property_declaration (cp_parser *parser)
23121 /* The following variables hold the attributes of the properties as
23122 parsed. They are 'false' or 'NULL_TREE' if the attribute was not
23123 seen. When we see an attribute, we set them to 'true' (if they
23124 are boolean properties) or to the identifier (if they have an
23125 argument, ie, for getter and setter). Note that here we only
23126 parse the list of attributes, check the syntax and accumulate the
23127 attributes that we find. objc_add_property_declaration() will
23128 then process the information. */
23129 bool property_assign = false;
23130 bool property_copy = false;
23131 tree property_getter_ident = NULL_TREE;
23132 bool property_nonatomic = false;
23133 bool property_readonly = false;
23134 bool property_readwrite = false;
23135 bool property_retain = false;
23136 tree property_setter_ident = NULL_TREE;
23138 /* 'properties' is the list of properties that we read. Usually a
23139 single one, but maybe more (eg, in "@property int a, b, c;" there
23144 loc = cp_lexer_peek_token (parser->lexer)->location;
23146 cp_lexer_consume_token (parser->lexer); /* Eat '@property'. */
23148 /* Parse the optional attribute list... */
23149 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
23152 cp_lexer_consume_token (parser->lexer);
23156 bool syntax_error = false;
23157 cp_token *token = cp_lexer_peek_token (parser->lexer);
23160 if (token->type != CPP_NAME)
23162 cp_parser_error (parser, "expected identifier");
23165 keyword = C_RID_CODE (token->u.value);
23166 cp_lexer_consume_token (parser->lexer);
23169 case RID_ASSIGN: property_assign = true; break;
23170 case RID_COPY: property_copy = true; break;
23171 case RID_NONATOMIC: property_nonatomic = true; break;
23172 case RID_READONLY: property_readonly = true; break;
23173 case RID_READWRITE: property_readwrite = true; break;
23174 case RID_RETAIN: property_retain = true; break;
23178 if (cp_lexer_next_token_is_not (parser->lexer, CPP_EQ))
23180 if (keyword == RID_GETTER)
23181 cp_parser_error (parser,
23182 "missing %<=%> (after %<getter%> attribute)");
23184 cp_parser_error (parser,
23185 "missing %<=%> (after %<setter%> attribute)");
23186 syntax_error = true;
23189 cp_lexer_consume_token (parser->lexer); /* eat the = */
23190 if (!cp_parser_objc_selector_p (cp_lexer_peek_token (parser->lexer)->type))
23192 cp_parser_error (parser, "expected identifier");
23193 syntax_error = true;
23196 if (keyword == RID_SETTER)
23198 if (property_setter_ident != NULL_TREE)
23200 cp_parser_error (parser, "the %<setter%> attribute may only be specified once");
23201 cp_lexer_consume_token (parser->lexer);
23204 property_setter_ident = cp_parser_objc_selector (parser);
23205 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COLON))
23206 cp_parser_error (parser, "setter name must terminate with %<:%>");
23208 cp_lexer_consume_token (parser->lexer);
23212 if (property_getter_ident != NULL_TREE)
23214 cp_parser_error (parser, "the %<getter%> attribute may only be specified once");
23215 cp_lexer_consume_token (parser->lexer);
23218 property_getter_ident = cp_parser_objc_selector (parser);
23222 cp_parser_error (parser, "unknown property attribute");
23223 syntax_error = true;
23230 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
23231 cp_lexer_consume_token (parser->lexer);
23236 /* FIXME: "@property (setter, assign);" will generate a spurious
23237 "error: expected ‘)’ before ‘,’ token". This is because
23238 cp_parser_require, unlike the C counterpart, will produce an
23239 error even if we are in error recovery. */
23240 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
23242 cp_parser_skip_to_closing_parenthesis (parser,
23243 /*recovering=*/true,
23244 /*or_comma=*/false,
23245 /*consume_paren=*/true);
23249 /* ... and the property declaration(s). */
23250 properties = cp_parser_objc_struct_declaration (parser);
23252 if (properties == error_mark_node)
23254 cp_parser_skip_to_end_of_statement (parser);
23255 /* If the next token is now a `;', consume it. */
23256 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
23257 cp_lexer_consume_token (parser->lexer);
23261 if (properties == NULL_TREE)
23262 cp_parser_error (parser, "expected identifier");
23265 /* Comma-separated properties are chained together in
23266 reverse order; add them one by one. */
23267 properties = nreverse (properties);
23269 for (; properties; properties = TREE_CHAIN (properties))
23270 objc_add_property_declaration (loc, copy_node (properties),
23271 property_readonly, property_readwrite,
23272 property_assign, property_retain,
23273 property_copy, property_nonatomic,
23274 property_getter_ident, property_setter_ident);
23277 cp_parser_consume_semicolon_at_end_of_statement (parser);
23280 /* Parse an Objective-C++ @synthesize declaration. The syntax is:
23282 objc-synthesize-declaration:
23283 @synthesize objc-synthesize-identifier-list ;
23285 objc-synthesize-identifier-list:
23286 objc-synthesize-identifier
23287 objc-synthesize-identifier-list, objc-synthesize-identifier
23289 objc-synthesize-identifier
23291 identifier = identifier
23294 @synthesize MyProperty;
23295 @synthesize OneProperty, AnotherProperty=MyIvar, YetAnotherProperty;
23297 PS: This function is identical to c_parser_objc_at_synthesize_declaration
23298 for C. Keep them in sync.
23301 cp_parser_objc_at_synthesize_declaration (cp_parser *parser)
23303 tree list = NULL_TREE;
23305 loc = cp_lexer_peek_token (parser->lexer)->location;
23307 cp_lexer_consume_token (parser->lexer); /* Eat '@synthesize'. */
23310 tree property, ivar;
23311 property = cp_parser_identifier (parser);
23312 if (property == error_mark_node)
23314 cp_parser_consume_semicolon_at_end_of_statement (parser);
23317 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
23319 cp_lexer_consume_token (parser->lexer);
23320 ivar = cp_parser_identifier (parser);
23321 if (ivar == error_mark_node)
23323 cp_parser_consume_semicolon_at_end_of_statement (parser);
23329 list = chainon (list, build_tree_list (ivar, property));
23330 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
23331 cp_lexer_consume_token (parser->lexer);
23335 cp_parser_consume_semicolon_at_end_of_statement (parser);
23336 objc_add_synthesize_declaration (loc, list);
23339 /* Parse an Objective-C++ @dynamic declaration. The syntax is:
23341 objc-dynamic-declaration:
23342 @dynamic identifier-list ;
23345 @dynamic MyProperty;
23346 @dynamic MyProperty, AnotherProperty;
23348 PS: This function is identical to c_parser_objc_at_dynamic_declaration
23349 for C. Keep them in sync.
23352 cp_parser_objc_at_dynamic_declaration (cp_parser *parser)
23354 tree list = NULL_TREE;
23356 loc = cp_lexer_peek_token (parser->lexer)->location;
23358 cp_lexer_consume_token (parser->lexer); /* Eat '@dynamic'. */
23362 property = cp_parser_identifier (parser);
23363 if (property == error_mark_node)
23365 cp_parser_consume_semicolon_at_end_of_statement (parser);
23368 list = chainon (list, build_tree_list (NULL, property));
23369 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
23370 cp_lexer_consume_token (parser->lexer);
23374 cp_parser_consume_semicolon_at_end_of_statement (parser);
23375 objc_add_dynamic_declaration (loc, list);
23379 /* OpenMP 2.5 parsing routines. */
23381 /* Returns name of the next clause.
23382 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
23383 the token is not consumed. Otherwise appropriate pragma_omp_clause is
23384 returned and the token is consumed. */
23386 static pragma_omp_clause
23387 cp_parser_omp_clause_name (cp_parser *parser)
23389 pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE;
23391 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_IF))
23392 result = PRAGMA_OMP_CLAUSE_IF;
23393 else if (cp_lexer_next_token_is_keyword (parser->lexer, RID_DEFAULT))
23394 result = PRAGMA_OMP_CLAUSE_DEFAULT;
23395 else if (cp_lexer_next_token_is_keyword (parser->lexer, RID_PRIVATE))
23396 result = PRAGMA_OMP_CLAUSE_PRIVATE;
23397 else if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
23399 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
23400 const char *p = IDENTIFIER_POINTER (id);
23405 if (!strcmp ("collapse", p))
23406 result = PRAGMA_OMP_CLAUSE_COLLAPSE;
23407 else if (!strcmp ("copyin", p))
23408 result = PRAGMA_OMP_CLAUSE_COPYIN;
23409 else if (!strcmp ("copyprivate", p))
23410 result = PRAGMA_OMP_CLAUSE_COPYPRIVATE;
23413 if (!strcmp ("firstprivate", p))
23414 result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE;
23417 if (!strcmp ("lastprivate", p))
23418 result = PRAGMA_OMP_CLAUSE_LASTPRIVATE;
23421 if (!strcmp ("nowait", p))
23422 result = PRAGMA_OMP_CLAUSE_NOWAIT;
23423 else if (!strcmp ("num_threads", p))
23424 result = PRAGMA_OMP_CLAUSE_NUM_THREADS;
23427 if (!strcmp ("ordered", p))
23428 result = PRAGMA_OMP_CLAUSE_ORDERED;
23431 if (!strcmp ("reduction", p))
23432 result = PRAGMA_OMP_CLAUSE_REDUCTION;
23435 if (!strcmp ("schedule", p))
23436 result = PRAGMA_OMP_CLAUSE_SCHEDULE;
23437 else if (!strcmp ("shared", p))
23438 result = PRAGMA_OMP_CLAUSE_SHARED;
23441 if (!strcmp ("untied", p))
23442 result = PRAGMA_OMP_CLAUSE_UNTIED;
23447 if (result != PRAGMA_OMP_CLAUSE_NONE)
23448 cp_lexer_consume_token (parser->lexer);
23453 /* Validate that a clause of the given type does not already exist. */
23456 check_no_duplicate_clause (tree clauses, enum omp_clause_code code,
23457 const char *name, location_t location)
23461 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
23462 if (OMP_CLAUSE_CODE (c) == code)
23464 error_at (location, "too many %qs clauses", name);
23472 variable-list , identifier
23474 In addition, we match a closing parenthesis. An opening parenthesis
23475 will have been consumed by the caller.
23477 If KIND is nonzero, create the appropriate node and install the decl
23478 in OMP_CLAUSE_DECL and add the node to the head of the list.
23480 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
23481 return the list created. */
23484 cp_parser_omp_var_list_no_open (cp_parser *parser, enum omp_clause_code kind,
23492 token = cp_lexer_peek_token (parser->lexer);
23493 name = cp_parser_id_expression (parser, /*template_p=*/false,
23494 /*check_dependency_p=*/true,
23495 /*template_p=*/NULL,
23496 /*declarator_p=*/false,
23497 /*optional_p=*/false);
23498 if (name == error_mark_node)
23501 decl = cp_parser_lookup_name_simple (parser, name, token->location);
23502 if (decl == error_mark_node)
23503 cp_parser_name_lookup_error (parser, name, decl, NLE_NULL,
23505 else if (kind != 0)
23507 tree u = build_omp_clause (token->location, kind);
23508 OMP_CLAUSE_DECL (u) = decl;
23509 OMP_CLAUSE_CHAIN (u) = list;
23513 list = tree_cons (decl, NULL_TREE, list);
23516 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
23518 cp_lexer_consume_token (parser->lexer);
23521 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
23525 /* Try to resync to an unnested comma. Copied from
23526 cp_parser_parenthesized_expression_list. */
23528 ending = cp_parser_skip_to_closing_parenthesis (parser,
23529 /*recovering=*/true,
23531 /*consume_paren=*/true);
23539 /* Similarly, but expect leading and trailing parenthesis. This is a very
23540 common case for omp clauses. */
23543 cp_parser_omp_var_list (cp_parser *parser, enum omp_clause_code kind, tree list)
23545 if (cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
23546 return cp_parser_omp_var_list_no_open (parser, kind, list);
23551 collapse ( constant-expression ) */
23554 cp_parser_omp_clause_collapse (cp_parser *parser, tree list, location_t location)
23560 loc = cp_lexer_peek_token (parser->lexer)->location;
23561 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
23564 num = cp_parser_constant_expression (parser, false, NULL);
23566 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
23567 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
23568 /*or_comma=*/false,
23569 /*consume_paren=*/true);
23571 if (num == error_mark_node)
23573 num = fold_non_dependent_expr (num);
23574 if (!INTEGRAL_TYPE_P (TREE_TYPE (num))
23575 || !host_integerp (num, 0)
23576 || (n = tree_low_cst (num, 0)) <= 0
23579 error_at (loc, "collapse argument needs positive constant integer expression");
23583 check_no_duplicate_clause (list, OMP_CLAUSE_COLLAPSE, "collapse", location);
23584 c = build_omp_clause (loc, OMP_CLAUSE_COLLAPSE);
23585 OMP_CLAUSE_CHAIN (c) = list;
23586 OMP_CLAUSE_COLLAPSE_EXPR (c) = num;
23592 default ( shared | none ) */
23595 cp_parser_omp_clause_default (cp_parser *parser, tree list, location_t location)
23597 enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED;
23600 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
23602 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
23604 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
23605 const char *p = IDENTIFIER_POINTER (id);
23610 if (strcmp ("none", p) != 0)
23612 kind = OMP_CLAUSE_DEFAULT_NONE;
23616 if (strcmp ("shared", p) != 0)
23618 kind = OMP_CLAUSE_DEFAULT_SHARED;
23625 cp_lexer_consume_token (parser->lexer);
23630 cp_parser_error (parser, "expected %<none%> or %<shared%>");
23633 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
23634 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
23635 /*or_comma=*/false,
23636 /*consume_paren=*/true);
23638 if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED)
23641 check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default", location);
23642 c = build_omp_clause (location, OMP_CLAUSE_DEFAULT);
23643 OMP_CLAUSE_CHAIN (c) = list;
23644 OMP_CLAUSE_DEFAULT_KIND (c) = kind;
23650 if ( expression ) */
23653 cp_parser_omp_clause_if (cp_parser *parser, tree list, location_t location)
23657 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
23660 t = cp_parser_condition (parser);
23662 if (t == error_mark_node
23663 || !cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
23664 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
23665 /*or_comma=*/false,
23666 /*consume_paren=*/true);
23668 check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if", location);
23670 c = build_omp_clause (location, OMP_CLAUSE_IF);
23671 OMP_CLAUSE_IF_EXPR (c) = t;
23672 OMP_CLAUSE_CHAIN (c) = list;
23681 cp_parser_omp_clause_nowait (cp_parser *parser ATTRIBUTE_UNUSED,
23682 tree list, location_t location)
23686 check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait", location);
23688 c = build_omp_clause (location, OMP_CLAUSE_NOWAIT);
23689 OMP_CLAUSE_CHAIN (c) = list;
23694 num_threads ( expression ) */
23697 cp_parser_omp_clause_num_threads (cp_parser *parser, tree list,
23698 location_t location)
23702 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
23705 t = cp_parser_expression (parser, false, NULL);
23707 if (t == error_mark_node
23708 || !cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
23709 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
23710 /*or_comma=*/false,
23711 /*consume_paren=*/true);
23713 check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS,
23714 "num_threads", location);
23716 c = build_omp_clause (location, OMP_CLAUSE_NUM_THREADS);
23717 OMP_CLAUSE_NUM_THREADS_EXPR (c) = t;
23718 OMP_CLAUSE_CHAIN (c) = list;
23727 cp_parser_omp_clause_ordered (cp_parser *parser ATTRIBUTE_UNUSED,
23728 tree list, location_t location)
23732 check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED,
23733 "ordered", location);
23735 c = build_omp_clause (location, OMP_CLAUSE_ORDERED);
23736 OMP_CLAUSE_CHAIN (c) = list;
23741 reduction ( reduction-operator : variable-list )
23743 reduction-operator:
23744 One of: + * - & ^ | && || */
23747 cp_parser_omp_clause_reduction (cp_parser *parser, tree list)
23749 enum tree_code code;
23752 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
23755 switch (cp_lexer_peek_token (parser->lexer)->type)
23767 code = BIT_AND_EXPR;
23770 code = BIT_XOR_EXPR;
23773 code = BIT_IOR_EXPR;
23776 code = TRUTH_ANDIF_EXPR;
23779 code = TRUTH_ORIF_EXPR;
23782 cp_parser_error (parser, "expected %<+%>, %<*%>, %<-%>, %<&%>, %<^%>, "
23783 "%<|%>, %<&&%>, or %<||%>");
23785 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
23786 /*or_comma=*/false,
23787 /*consume_paren=*/true);
23790 cp_lexer_consume_token (parser->lexer);
23792 if (!cp_parser_require (parser, CPP_COLON, RT_COLON))
23795 nlist = cp_parser_omp_var_list_no_open (parser, OMP_CLAUSE_REDUCTION, list);
23796 for (c = nlist; c != list; c = OMP_CLAUSE_CHAIN (c))
23797 OMP_CLAUSE_REDUCTION_CODE (c) = code;
23803 schedule ( schedule-kind )
23804 schedule ( schedule-kind , expression )
23807 static | dynamic | guided | runtime | auto */
23810 cp_parser_omp_clause_schedule (cp_parser *parser, tree list, location_t location)
23814 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
23817 c = build_omp_clause (location, OMP_CLAUSE_SCHEDULE);
23819 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
23821 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
23822 const char *p = IDENTIFIER_POINTER (id);
23827 if (strcmp ("dynamic", p) != 0)
23829 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC;
23833 if (strcmp ("guided", p) != 0)
23835 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED;
23839 if (strcmp ("runtime", p) != 0)
23841 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME;
23848 else if (cp_lexer_next_token_is_keyword (parser->lexer, RID_STATIC))
23849 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC;
23850 else if (cp_lexer_next_token_is_keyword (parser->lexer, RID_AUTO))
23851 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO;
23854 cp_lexer_consume_token (parser->lexer);
23856 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
23859 cp_lexer_consume_token (parser->lexer);
23861 token = cp_lexer_peek_token (parser->lexer);
23862 t = cp_parser_assignment_expression (parser, false, NULL);
23864 if (t == error_mark_node)
23866 else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME)
23867 error_at (token->location, "schedule %<runtime%> does not take "
23868 "a %<chunk_size%> parameter");
23869 else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_AUTO)
23870 error_at (token->location, "schedule %<auto%> does not take "
23871 "a %<chunk_size%> parameter");
23873 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t;
23875 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
23878 else if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_COMMA_CLOSE_PAREN))
23881 check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule", location);
23882 OMP_CLAUSE_CHAIN (c) = list;
23886 cp_parser_error (parser, "invalid schedule kind");
23888 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
23889 /*or_comma=*/false,
23890 /*consume_paren=*/true);
23898 cp_parser_omp_clause_untied (cp_parser *parser ATTRIBUTE_UNUSED,
23899 tree list, location_t location)
23903 check_no_duplicate_clause (list, OMP_CLAUSE_UNTIED, "untied", location);
23905 c = build_omp_clause (location, OMP_CLAUSE_UNTIED);
23906 OMP_CLAUSE_CHAIN (c) = list;
23910 /* Parse all OpenMP clauses. The set clauses allowed by the directive
23911 is a bitmask in MASK. Return the list of clauses found; the result
23912 of clause default goes in *pdefault. */
23915 cp_parser_omp_all_clauses (cp_parser *parser, unsigned int mask,
23916 const char *where, cp_token *pragma_tok)
23918 tree clauses = NULL;
23920 cp_token *token = NULL;
23922 while (cp_lexer_next_token_is_not (parser->lexer, CPP_PRAGMA_EOL))
23924 pragma_omp_clause c_kind;
23925 const char *c_name;
23926 tree prev = clauses;
23928 if (!first && cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
23929 cp_lexer_consume_token (parser->lexer);
23931 token = cp_lexer_peek_token (parser->lexer);
23932 c_kind = cp_parser_omp_clause_name (parser);
23937 case PRAGMA_OMP_CLAUSE_COLLAPSE:
23938 clauses = cp_parser_omp_clause_collapse (parser, clauses,
23940 c_name = "collapse";
23942 case PRAGMA_OMP_CLAUSE_COPYIN:
23943 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_COPYIN, clauses);
23946 case PRAGMA_OMP_CLAUSE_COPYPRIVATE:
23947 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_COPYPRIVATE,
23949 c_name = "copyprivate";
23951 case PRAGMA_OMP_CLAUSE_DEFAULT:
23952 clauses = cp_parser_omp_clause_default (parser, clauses,
23954 c_name = "default";
23956 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE:
23957 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_FIRSTPRIVATE,
23959 c_name = "firstprivate";
23961 case PRAGMA_OMP_CLAUSE_IF:
23962 clauses = cp_parser_omp_clause_if (parser, clauses, token->location);
23965 case PRAGMA_OMP_CLAUSE_LASTPRIVATE:
23966 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_LASTPRIVATE,
23968 c_name = "lastprivate";
23970 case PRAGMA_OMP_CLAUSE_NOWAIT:
23971 clauses = cp_parser_omp_clause_nowait (parser, clauses, token->location);
23974 case PRAGMA_OMP_CLAUSE_NUM_THREADS:
23975 clauses = cp_parser_omp_clause_num_threads (parser, clauses,
23977 c_name = "num_threads";
23979 case PRAGMA_OMP_CLAUSE_ORDERED:
23980 clauses = cp_parser_omp_clause_ordered (parser, clauses,
23982 c_name = "ordered";
23984 case PRAGMA_OMP_CLAUSE_PRIVATE:
23985 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_PRIVATE,
23987 c_name = "private";
23989 case PRAGMA_OMP_CLAUSE_REDUCTION:
23990 clauses = cp_parser_omp_clause_reduction (parser, clauses);
23991 c_name = "reduction";
23993 case PRAGMA_OMP_CLAUSE_SCHEDULE:
23994 clauses = cp_parser_omp_clause_schedule (parser, clauses,
23996 c_name = "schedule";
23998 case PRAGMA_OMP_CLAUSE_SHARED:
23999 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_SHARED,
24003 case PRAGMA_OMP_CLAUSE_UNTIED:
24004 clauses = cp_parser_omp_clause_untied (parser, clauses,
24009 cp_parser_error (parser, "expected %<#pragma omp%> clause");
24013 if (((mask >> c_kind) & 1) == 0)
24015 /* Remove the invalid clause(s) from the list to avoid
24016 confusing the rest of the compiler. */
24018 error_at (token->location, "%qs is not valid for %qs", c_name, where);
24022 cp_parser_skip_to_pragma_eol (parser, pragma_tok);
24023 return finish_omp_clauses (clauses);
24030 In practice, we're also interested in adding the statement to an
24031 outer node. So it is convenient if we work around the fact that
24032 cp_parser_statement calls add_stmt. */
24035 cp_parser_begin_omp_structured_block (cp_parser *parser)
24037 unsigned save = parser->in_statement;
24039 /* Only move the values to IN_OMP_BLOCK if they weren't false.
24040 This preserves the "not within loop or switch" style error messages
24041 for nonsense cases like
24047 if (parser->in_statement)
24048 parser->in_statement = IN_OMP_BLOCK;
24054 cp_parser_end_omp_structured_block (cp_parser *parser, unsigned save)
24056 parser->in_statement = save;
24060 cp_parser_omp_structured_block (cp_parser *parser)
24062 tree stmt = begin_omp_structured_block ();
24063 unsigned int save = cp_parser_begin_omp_structured_block (parser);
24065 cp_parser_statement (parser, NULL_TREE, false, NULL);
24067 cp_parser_end_omp_structured_block (parser, save);
24068 return finish_omp_structured_block (stmt);
24072 # pragma omp atomic new-line
24076 x binop= expr | x++ | ++x | x-- | --x
24078 +, *, -, /, &, ^, |, <<, >>
24080 where x is an lvalue expression with scalar type. */
24083 cp_parser_omp_atomic (cp_parser *parser, cp_token *pragma_tok)
24086 enum tree_code code;
24088 cp_parser_require_pragma_eol (parser, pragma_tok);
24090 lhs = cp_parser_unary_expression (parser, /*address_p=*/false,
24091 /*cast_p=*/false, NULL);
24092 switch (TREE_CODE (lhs))
24097 case PREINCREMENT_EXPR:
24098 case POSTINCREMENT_EXPR:
24099 lhs = TREE_OPERAND (lhs, 0);
24101 rhs = integer_one_node;
24104 case PREDECREMENT_EXPR:
24105 case POSTDECREMENT_EXPR:
24106 lhs = TREE_OPERAND (lhs, 0);
24108 rhs = integer_one_node;
24111 case COMPOUND_EXPR:
24112 if (TREE_CODE (TREE_OPERAND (lhs, 0)) == SAVE_EXPR
24113 && TREE_CODE (TREE_OPERAND (lhs, 1)) == COMPOUND_EXPR
24114 && TREE_CODE (TREE_OPERAND (TREE_OPERAND (lhs, 1), 0)) == MODIFY_EXPR
24115 && TREE_OPERAND (TREE_OPERAND (lhs, 1), 1) == TREE_OPERAND (lhs, 0)
24116 && TREE_CODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND
24117 (TREE_OPERAND (lhs, 1), 0), 0)))
24119 /* Undo effects of boolean_increment for post {in,de}crement. */
24120 lhs = TREE_OPERAND (TREE_OPERAND (lhs, 1), 0);
24123 if (TREE_CODE (lhs) == MODIFY_EXPR
24124 && TREE_CODE (TREE_TYPE (TREE_OPERAND (lhs, 0))) == BOOLEAN_TYPE)
24126 /* Undo effects of boolean_increment. */
24127 if (integer_onep (TREE_OPERAND (lhs, 1)))
24129 /* This is pre or post increment. */
24130 rhs = TREE_OPERAND (lhs, 1);
24131 lhs = TREE_OPERAND (lhs, 0);
24138 switch (cp_lexer_peek_token (parser->lexer)->type)
24144 code = TRUNC_DIV_EXPR;
24152 case CPP_LSHIFT_EQ:
24153 code = LSHIFT_EXPR;
24155 case CPP_RSHIFT_EQ:
24156 code = RSHIFT_EXPR;
24159 code = BIT_AND_EXPR;
24162 code = BIT_IOR_EXPR;
24165 code = BIT_XOR_EXPR;
24168 cp_parser_error (parser,
24169 "invalid operator for %<#pragma omp atomic%>");
24172 cp_lexer_consume_token (parser->lexer);
24174 rhs = cp_parser_expression (parser, false, NULL);
24175 if (rhs == error_mark_node)
24179 finish_omp_atomic (code, lhs, rhs);
24180 cp_parser_consume_semicolon_at_end_of_statement (parser);
24184 cp_parser_skip_to_end_of_block_or_statement (parser);
24189 # pragma omp barrier new-line */
24192 cp_parser_omp_barrier (cp_parser *parser, cp_token *pragma_tok)
24194 cp_parser_require_pragma_eol (parser, pragma_tok);
24195 finish_omp_barrier ();
24199 # pragma omp critical [(name)] new-line
24200 structured-block */
24203 cp_parser_omp_critical (cp_parser *parser, cp_token *pragma_tok)
24205 tree stmt, name = NULL;
24207 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
24209 cp_lexer_consume_token (parser->lexer);
24211 name = cp_parser_identifier (parser);
24213 if (name == error_mark_node
24214 || !cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
24215 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
24216 /*or_comma=*/false,
24217 /*consume_paren=*/true);
24218 if (name == error_mark_node)
24221 cp_parser_require_pragma_eol (parser, pragma_tok);
24223 stmt = cp_parser_omp_structured_block (parser);
24224 return c_finish_omp_critical (input_location, stmt, name);
24228 # pragma omp flush flush-vars[opt] new-line
24231 ( variable-list ) */
24234 cp_parser_omp_flush (cp_parser *parser, cp_token *pragma_tok)
24236 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
24237 (void) cp_parser_omp_var_list (parser, OMP_CLAUSE_ERROR, NULL);
24238 cp_parser_require_pragma_eol (parser, pragma_tok);
24240 finish_omp_flush ();
24243 /* Helper function, to parse omp for increment expression. */
24246 cp_parser_omp_for_cond (cp_parser *parser, tree decl)
24248 tree cond = cp_parser_binary_expression (parser, false, true,
24249 PREC_NOT_OPERATOR, NULL);
24252 if (cond == error_mark_node
24253 || cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
24255 cp_parser_skip_to_end_of_statement (parser);
24256 return error_mark_node;
24259 switch (TREE_CODE (cond))
24267 return error_mark_node;
24270 /* If decl is an iterator, preserve LHS and RHS of the relational
24271 expr until finish_omp_for. */
24273 && (type_dependent_expression_p (decl)
24274 || CLASS_TYPE_P (TREE_TYPE (decl))))
24277 return build_x_binary_op (TREE_CODE (cond),
24278 TREE_OPERAND (cond, 0), ERROR_MARK,
24279 TREE_OPERAND (cond, 1), ERROR_MARK,
24280 &overloaded_p, tf_warning_or_error);
24283 /* Helper function, to parse omp for increment expression. */
24286 cp_parser_omp_for_incr (cp_parser *parser, tree decl)
24288 cp_token *token = cp_lexer_peek_token (parser->lexer);
24294 if (token->type == CPP_PLUS_PLUS || token->type == CPP_MINUS_MINUS)
24296 op = (token->type == CPP_PLUS_PLUS
24297 ? PREINCREMENT_EXPR : PREDECREMENT_EXPR);
24298 cp_lexer_consume_token (parser->lexer);
24299 lhs = cp_parser_cast_expression (parser, false, false, NULL);
24301 return error_mark_node;
24302 return build2 (op, TREE_TYPE (decl), decl, NULL_TREE);
24305 lhs = cp_parser_primary_expression (parser, false, false, false, &idk);
24307 return error_mark_node;
24309 token = cp_lexer_peek_token (parser->lexer);
24310 if (token->type == CPP_PLUS_PLUS || token->type == CPP_MINUS_MINUS)
24312 op = (token->type == CPP_PLUS_PLUS
24313 ? POSTINCREMENT_EXPR : POSTDECREMENT_EXPR);
24314 cp_lexer_consume_token (parser->lexer);
24315 return build2 (op, TREE_TYPE (decl), decl, NULL_TREE);
24318 op = cp_parser_assignment_operator_opt (parser);
24319 if (op == ERROR_MARK)
24320 return error_mark_node;
24322 if (op != NOP_EXPR)
24324 rhs = cp_parser_assignment_expression (parser, false, NULL);
24325 rhs = build2 (op, TREE_TYPE (decl), decl, rhs);
24326 return build2 (MODIFY_EXPR, TREE_TYPE (decl), decl, rhs);
24329 lhs = cp_parser_binary_expression (parser, false, false,
24330 PREC_ADDITIVE_EXPRESSION, NULL);
24331 token = cp_lexer_peek_token (parser->lexer);
24332 decl_first = lhs == decl;
24335 if (token->type != CPP_PLUS
24336 && token->type != CPP_MINUS)
24337 return error_mark_node;
24341 op = token->type == CPP_PLUS ? PLUS_EXPR : MINUS_EXPR;
24342 cp_lexer_consume_token (parser->lexer);
24343 rhs = cp_parser_binary_expression (parser, false, false,
24344 PREC_ADDITIVE_EXPRESSION, NULL);
24345 token = cp_lexer_peek_token (parser->lexer);
24346 if (token->type == CPP_PLUS || token->type == CPP_MINUS || decl_first)
24348 if (lhs == NULL_TREE)
24350 if (op == PLUS_EXPR)
24353 lhs = build_x_unary_op (NEGATE_EXPR, rhs, tf_warning_or_error);
24356 lhs = build_x_binary_op (op, lhs, ERROR_MARK, rhs, ERROR_MARK,
24357 NULL, tf_warning_or_error);
24360 while (token->type == CPP_PLUS || token->type == CPP_MINUS);
24364 if (rhs != decl || op == MINUS_EXPR)
24365 return error_mark_node;
24366 rhs = build2 (op, TREE_TYPE (decl), lhs, decl);
24369 rhs = build2 (PLUS_EXPR, TREE_TYPE (decl), decl, lhs);
24371 return build2 (MODIFY_EXPR, TREE_TYPE (decl), decl, rhs);
24374 /* Parse the restricted form of the for statement allowed by OpenMP. */
24377 cp_parser_omp_for_loop (cp_parser *parser, tree clauses, tree *par_clauses)
24379 tree init, cond, incr, body, decl, pre_body = NULL_TREE, ret;
24380 tree real_decl, initv, condv, incrv, declv;
24381 tree this_pre_body, cl;
24382 location_t loc_first;
24383 bool collapse_err = false;
24384 int i, collapse = 1, nbraces = 0;
24385 VEC(tree,gc) *for_block = make_tree_vector ();
24387 for (cl = clauses; cl; cl = OMP_CLAUSE_CHAIN (cl))
24388 if (OMP_CLAUSE_CODE (cl) == OMP_CLAUSE_COLLAPSE)
24389 collapse = tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl), 0);
24391 gcc_assert (collapse >= 1);
24393 declv = make_tree_vec (collapse);
24394 initv = make_tree_vec (collapse);
24395 condv = make_tree_vec (collapse);
24396 incrv = make_tree_vec (collapse);
24398 loc_first = cp_lexer_peek_token (parser->lexer)->location;
24400 for (i = 0; i < collapse; i++)
24402 int bracecount = 0;
24403 bool add_private_clause = false;
24406 if (!cp_lexer_next_token_is_keyword (parser->lexer, RID_FOR))
24408 cp_parser_error (parser, "for statement expected");
24411 loc = cp_lexer_consume_token (parser->lexer)->location;
24413 if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
24416 init = decl = real_decl = NULL;
24417 this_pre_body = push_stmt_list ();
24418 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
24420 /* See 2.5.1 (in OpenMP 3.0, similar wording is in 2.5 standard too):
24424 integer-type var = lb
24425 random-access-iterator-type var = lb
24426 pointer-type var = lb
24428 cp_decl_specifier_seq type_specifiers;
24430 /* First, try to parse as an initialized declaration. See
24431 cp_parser_condition, from whence the bulk of this is copied. */
24433 cp_parser_parse_tentatively (parser);
24434 cp_parser_type_specifier_seq (parser, /*is_declaration=*/true,
24435 /*is_trailing_return=*/false,
24437 if (cp_parser_parse_definitely (parser))
24439 /* If parsing a type specifier seq succeeded, then this
24440 MUST be a initialized declaration. */
24441 tree asm_specification, attributes;
24442 cp_declarator *declarator;
24444 declarator = cp_parser_declarator (parser,
24445 CP_PARSER_DECLARATOR_NAMED,
24446 /*ctor_dtor_or_conv_p=*/NULL,
24447 /*parenthesized_p=*/NULL,
24448 /*member_p=*/false);
24449 attributes = cp_parser_attributes_opt (parser);
24450 asm_specification = cp_parser_asm_specification_opt (parser);
24452 if (declarator == cp_error_declarator)
24453 cp_parser_skip_to_end_of_statement (parser);
24457 tree pushed_scope, auto_node;
24459 decl = start_decl (declarator, &type_specifiers,
24460 SD_INITIALIZED, attributes,
24461 /*prefix_attributes=*/NULL_TREE,
24464 auto_node = type_uses_auto (TREE_TYPE (decl));
24465 if (cp_lexer_next_token_is_not (parser->lexer, CPP_EQ))
24467 if (cp_lexer_next_token_is (parser->lexer,
24469 error ("parenthesized initialization is not allowed in "
24470 "OpenMP %<for%> loop");
24472 /* Trigger an error. */
24473 cp_parser_require (parser, CPP_EQ, RT_EQ);
24475 init = error_mark_node;
24476 cp_parser_skip_to_end_of_statement (parser);
24478 else if (CLASS_TYPE_P (TREE_TYPE (decl))
24479 || type_dependent_expression_p (decl)
24482 bool is_direct_init, is_non_constant_init;
24484 init = cp_parser_initializer (parser,
24486 &is_non_constant_init);
24488 if (auto_node && describable_type (init))
24491 = do_auto_deduction (TREE_TYPE (decl), init,
24494 if (!CLASS_TYPE_P (TREE_TYPE (decl))
24495 && !type_dependent_expression_p (decl))
24499 cp_finish_decl (decl, init, !is_non_constant_init,
24501 LOOKUP_ONLYCONVERTING);
24502 if (CLASS_TYPE_P (TREE_TYPE (decl)))
24504 VEC_safe_push (tree, gc, for_block, this_pre_body);
24508 init = pop_stmt_list (this_pre_body);
24509 this_pre_body = NULL_TREE;
24514 cp_lexer_consume_token (parser->lexer);
24515 init = cp_parser_assignment_expression (parser, false, NULL);
24518 if (TREE_CODE (TREE_TYPE (decl)) == REFERENCE_TYPE)
24519 init = error_mark_node;
24521 cp_finish_decl (decl, NULL_TREE,
24522 /*init_const_expr_p=*/false,
24524 LOOKUP_ONLYCONVERTING);
24528 pop_scope (pushed_scope);
24534 /* If parsing a type specifier sequence failed, then
24535 this MUST be a simple expression. */
24536 cp_parser_parse_tentatively (parser);
24537 decl = cp_parser_primary_expression (parser, false, false,
24539 if (!cp_parser_error_occurred (parser)
24542 && CLASS_TYPE_P (TREE_TYPE (decl)))
24546 cp_parser_parse_definitely (parser);
24547 cp_parser_require (parser, CPP_EQ, RT_EQ);
24548 rhs = cp_parser_assignment_expression (parser, false, NULL);
24549 finish_expr_stmt (build_x_modify_expr (decl, NOP_EXPR,
24551 tf_warning_or_error));
24552 add_private_clause = true;
24557 cp_parser_abort_tentative_parse (parser);
24558 init = cp_parser_expression (parser, false, NULL);
24561 if (TREE_CODE (init) == MODIFY_EXPR
24562 || TREE_CODE (init) == MODOP_EXPR)
24563 real_decl = TREE_OPERAND (init, 0);
24568 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
24571 this_pre_body = pop_stmt_list (this_pre_body);
24575 pre_body = push_stmt_list ();
24577 add_stmt (this_pre_body);
24578 pre_body = pop_stmt_list (pre_body);
24581 pre_body = this_pre_body;
24586 if (par_clauses != NULL && real_decl != NULL_TREE)
24589 for (c = par_clauses; *c ; )
24590 if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_FIRSTPRIVATE
24591 && OMP_CLAUSE_DECL (*c) == real_decl)
24593 error_at (loc, "iteration variable %qD"
24594 " should not be firstprivate", real_decl);
24595 *c = OMP_CLAUSE_CHAIN (*c);
24597 else if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_LASTPRIVATE
24598 && OMP_CLAUSE_DECL (*c) == real_decl)
24600 /* Add lastprivate (decl) clause to OMP_FOR_CLAUSES,
24601 change it to shared (decl) in OMP_PARALLEL_CLAUSES. */
24602 tree l = build_omp_clause (loc, OMP_CLAUSE_LASTPRIVATE);
24603 OMP_CLAUSE_DECL (l) = real_decl;
24604 OMP_CLAUSE_CHAIN (l) = clauses;
24605 CP_OMP_CLAUSE_INFO (l) = CP_OMP_CLAUSE_INFO (*c);
24607 OMP_CLAUSE_SET_CODE (*c, OMP_CLAUSE_SHARED);
24608 CP_OMP_CLAUSE_INFO (*c) = NULL;
24609 add_private_clause = false;
24613 if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_PRIVATE
24614 && OMP_CLAUSE_DECL (*c) == real_decl)
24615 add_private_clause = false;
24616 c = &OMP_CLAUSE_CHAIN (*c);
24620 if (add_private_clause)
24623 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
24625 if ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_PRIVATE
24626 || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE)
24627 && OMP_CLAUSE_DECL (c) == decl)
24629 else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE
24630 && OMP_CLAUSE_DECL (c) == decl)
24631 error_at (loc, "iteration variable %qD "
24632 "should not be firstprivate",
24634 else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION
24635 && OMP_CLAUSE_DECL (c) == decl)
24636 error_at (loc, "iteration variable %qD should not be reduction",
24641 c = build_omp_clause (loc, OMP_CLAUSE_PRIVATE);
24642 OMP_CLAUSE_DECL (c) = decl;
24643 c = finish_omp_clauses (c);
24646 OMP_CLAUSE_CHAIN (c) = clauses;
24653 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
24654 cond = cp_parser_omp_for_cond (parser, decl);
24655 cp_parser_require (parser, CPP_SEMICOLON, RT_SEMICOLON);
24658 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN))
24660 /* If decl is an iterator, preserve the operator on decl
24661 until finish_omp_for. */
24663 && ((type_dependent_expression_p (decl)
24664 && !POINTER_TYPE_P (TREE_TYPE (decl)))
24665 || CLASS_TYPE_P (TREE_TYPE (decl))))
24666 incr = cp_parser_omp_for_incr (parser, decl);
24668 incr = cp_parser_expression (parser, false, NULL);
24671 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN))
24672 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
24673 /*or_comma=*/false,
24674 /*consume_paren=*/true);
24676 TREE_VEC_ELT (declv, i) = decl;
24677 TREE_VEC_ELT (initv, i) = init;
24678 TREE_VEC_ELT (condv, i) = cond;
24679 TREE_VEC_ELT (incrv, i) = incr;
24681 if (i == collapse - 1)
24684 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
24685 in between the collapsed for loops to be still considered perfectly
24686 nested. Hopefully the final version clarifies this.
24687 For now handle (multiple) {'s and empty statements. */
24688 cp_parser_parse_tentatively (parser);
24691 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_FOR))
24693 else if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
24695 cp_lexer_consume_token (parser->lexer);
24698 else if (bracecount
24699 && cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
24700 cp_lexer_consume_token (parser->lexer);
24703 loc = cp_lexer_peek_token (parser->lexer)->location;
24704 error_at (loc, "not enough collapsed for loops");
24705 collapse_err = true;
24706 cp_parser_abort_tentative_parse (parser);
24715 cp_parser_parse_definitely (parser);
24716 nbraces += bracecount;
24720 /* Note that we saved the original contents of this flag when we entered
24721 the structured block, and so we don't need to re-save it here. */
24722 parser->in_statement = IN_OMP_FOR;
24724 /* Note that the grammar doesn't call for a structured block here,
24725 though the loop as a whole is a structured block. */
24726 body = push_stmt_list ();
24727 cp_parser_statement (parser, NULL_TREE, false, NULL);
24728 body = pop_stmt_list (body);
24730 if (declv == NULL_TREE)
24733 ret = finish_omp_for (loc_first, declv, initv, condv, incrv, body,
24734 pre_body, clauses);
24738 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
24740 cp_lexer_consume_token (parser->lexer);
24743 else if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
24744 cp_lexer_consume_token (parser->lexer);
24749 error_at (cp_lexer_peek_token (parser->lexer)->location,
24750 "collapsed loops not perfectly nested");
24752 collapse_err = true;
24753 cp_parser_statement_seq_opt (parser, NULL);
24754 if (cp_lexer_next_token_is (parser->lexer, CPP_EOF))
24759 while (!VEC_empty (tree, for_block))
24760 add_stmt (pop_stmt_list (VEC_pop (tree, for_block)));
24761 release_tree_vector (for_block);
24767 #pragma omp for for-clause[optseq] new-line
24770 #define OMP_FOR_CLAUSE_MASK \
24771 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
24772 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
24773 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
24774 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
24775 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
24776 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
24777 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT) \
24778 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE))
24781 cp_parser_omp_for (cp_parser *parser, cp_token *pragma_tok)
24783 tree clauses, sb, ret;
24786 clauses = cp_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK,
24787 "#pragma omp for", pragma_tok);
24789 sb = begin_omp_structured_block ();
24790 save = cp_parser_begin_omp_structured_block (parser);
24792 ret = cp_parser_omp_for_loop (parser, clauses, NULL);
24794 cp_parser_end_omp_structured_block (parser, save);
24795 add_stmt (finish_omp_structured_block (sb));
24801 # pragma omp master new-line
24802 structured-block */
24805 cp_parser_omp_master (cp_parser *parser, cp_token *pragma_tok)
24807 cp_parser_require_pragma_eol (parser, pragma_tok);
24808 return c_finish_omp_master (input_location,
24809 cp_parser_omp_structured_block (parser));
24813 # pragma omp ordered new-line
24814 structured-block */
24817 cp_parser_omp_ordered (cp_parser *parser, cp_token *pragma_tok)
24819 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
24820 cp_parser_require_pragma_eol (parser, pragma_tok);
24821 return c_finish_omp_ordered (loc, cp_parser_omp_structured_block (parser));
24827 { section-sequence }
24830 section-directive[opt] structured-block
24831 section-sequence section-directive structured-block */
24834 cp_parser_omp_sections_scope (cp_parser *parser)
24836 tree stmt, substmt;
24837 bool error_suppress = false;
24840 if (!cp_parser_require (parser, CPP_OPEN_BRACE, RT_OPEN_BRACE))
24843 stmt = push_stmt_list ();
24845 if (cp_lexer_peek_token (parser->lexer)->pragma_kind != PRAGMA_OMP_SECTION)
24849 substmt = begin_omp_structured_block ();
24850 save = cp_parser_begin_omp_structured_block (parser);
24854 cp_parser_statement (parser, NULL_TREE, false, NULL);
24856 tok = cp_lexer_peek_token (parser->lexer);
24857 if (tok->pragma_kind == PRAGMA_OMP_SECTION)
24859 if (tok->type == CPP_CLOSE_BRACE)
24861 if (tok->type == CPP_EOF)
24865 cp_parser_end_omp_structured_block (parser, save);
24866 substmt = finish_omp_structured_block (substmt);
24867 substmt = build1 (OMP_SECTION, void_type_node, substmt);
24868 add_stmt (substmt);
24873 tok = cp_lexer_peek_token (parser->lexer);
24874 if (tok->type == CPP_CLOSE_BRACE)
24876 if (tok->type == CPP_EOF)
24879 if (tok->pragma_kind == PRAGMA_OMP_SECTION)
24881 cp_lexer_consume_token (parser->lexer);
24882 cp_parser_require_pragma_eol (parser, tok);
24883 error_suppress = false;
24885 else if (!error_suppress)
24887 cp_parser_error (parser, "expected %<#pragma omp section%> or %<}%>");
24888 error_suppress = true;
24891 substmt = cp_parser_omp_structured_block (parser);
24892 substmt = build1 (OMP_SECTION, void_type_node, substmt);
24893 add_stmt (substmt);
24895 cp_parser_require (parser, CPP_CLOSE_BRACE, RT_CLOSE_BRACE);
24897 substmt = pop_stmt_list (stmt);
24899 stmt = make_node (OMP_SECTIONS);
24900 TREE_TYPE (stmt) = void_type_node;
24901 OMP_SECTIONS_BODY (stmt) = substmt;
24908 # pragma omp sections sections-clause[optseq] newline
24911 #define OMP_SECTIONS_CLAUSE_MASK \
24912 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
24913 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
24914 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
24915 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
24916 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
24919 cp_parser_omp_sections (cp_parser *parser, cp_token *pragma_tok)
24923 clauses = cp_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK,
24924 "#pragma omp sections", pragma_tok);
24926 ret = cp_parser_omp_sections_scope (parser);
24928 OMP_SECTIONS_CLAUSES (ret) = clauses;
24934 # pragma parallel parallel-clause new-line
24935 # pragma parallel for parallel-for-clause new-line
24936 # pragma parallel sections parallel-sections-clause new-line */
24938 #define OMP_PARALLEL_CLAUSE_MASK \
24939 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
24940 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
24941 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
24942 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
24943 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
24944 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
24945 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
24946 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
24949 cp_parser_omp_parallel (cp_parser *parser, cp_token *pragma_tok)
24951 enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL;
24952 const char *p_name = "#pragma omp parallel";
24953 tree stmt, clauses, par_clause, ws_clause, block;
24954 unsigned int mask = OMP_PARALLEL_CLAUSE_MASK;
24956 location_t loc = cp_lexer_peek_token (parser->lexer)->location;
24958 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_FOR))
24960 cp_lexer_consume_token (parser->lexer);
24961 p_kind = PRAGMA_OMP_PARALLEL_FOR;
24962 p_name = "#pragma omp parallel for";
24963 mask |= OMP_FOR_CLAUSE_MASK;
24964 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
24966 else if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
24968 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
24969 const char *p = IDENTIFIER_POINTER (id);
24970 if (strcmp (p, "sections") == 0)
24972 cp_lexer_consume_token (parser->lexer);
24973 p_kind = PRAGMA_OMP_PARALLEL_SECTIONS;
24974 p_name = "#pragma omp parallel sections";
24975 mask |= OMP_SECTIONS_CLAUSE_MASK;
24976 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
24980 clauses = cp_parser_omp_all_clauses (parser, mask, p_name, pragma_tok);
24981 block = begin_omp_parallel ();
24982 save = cp_parser_begin_omp_structured_block (parser);
24986 case PRAGMA_OMP_PARALLEL:
24987 cp_parser_statement (parser, NULL_TREE, false, NULL);
24988 par_clause = clauses;
24991 case PRAGMA_OMP_PARALLEL_FOR:
24992 c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause);
24993 cp_parser_omp_for_loop (parser, ws_clause, &par_clause);
24996 case PRAGMA_OMP_PARALLEL_SECTIONS:
24997 c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause);
24998 stmt = cp_parser_omp_sections_scope (parser);
25000 OMP_SECTIONS_CLAUSES (stmt) = ws_clause;
25004 gcc_unreachable ();
25007 cp_parser_end_omp_structured_block (parser, save);
25008 stmt = finish_omp_parallel (par_clause, block);
25009 if (p_kind != PRAGMA_OMP_PARALLEL)
25010 OMP_PARALLEL_COMBINED (stmt) = 1;
25015 # pragma omp single single-clause[optseq] new-line
25016 structured-block */
25018 #define OMP_SINGLE_CLAUSE_MASK \
25019 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
25020 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
25021 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
25022 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
25025 cp_parser_omp_single (cp_parser *parser, cp_token *pragma_tok)
25027 tree stmt = make_node (OMP_SINGLE);
25028 TREE_TYPE (stmt) = void_type_node;
25030 OMP_SINGLE_CLAUSES (stmt)
25031 = cp_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK,
25032 "#pragma omp single", pragma_tok);
25033 OMP_SINGLE_BODY (stmt) = cp_parser_omp_structured_block (parser);
25035 return add_stmt (stmt);
25039 # pragma omp task task-clause[optseq] new-line
25040 structured-block */
25042 #define OMP_TASK_CLAUSE_MASK \
25043 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
25044 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
25045 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
25046 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
25047 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
25048 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
25051 cp_parser_omp_task (cp_parser *parser, cp_token *pragma_tok)
25053 tree clauses, block;
25056 clauses = cp_parser_omp_all_clauses (parser, OMP_TASK_CLAUSE_MASK,
25057 "#pragma omp task", pragma_tok);
25058 block = begin_omp_task ();
25059 save = cp_parser_begin_omp_structured_block (parser);
25060 cp_parser_statement (parser, NULL_TREE, false, NULL);
25061 cp_parser_end_omp_structured_block (parser, save);
25062 return finish_omp_task (clauses, block);
25066 # pragma omp taskwait new-line */
25069 cp_parser_omp_taskwait (cp_parser *parser, cp_token *pragma_tok)
25071 cp_parser_require_pragma_eol (parser, pragma_tok);
25072 finish_omp_taskwait ();
25076 # pragma omp threadprivate (variable-list) */
25079 cp_parser_omp_threadprivate (cp_parser *parser, cp_token *pragma_tok)
25083 vars = cp_parser_omp_var_list (parser, OMP_CLAUSE_ERROR, NULL);
25084 cp_parser_require_pragma_eol (parser, pragma_tok);
25086 finish_omp_threadprivate (vars);
25089 /* Main entry point to OpenMP statement pragmas. */
25092 cp_parser_omp_construct (cp_parser *parser, cp_token *pragma_tok)
25096 switch (pragma_tok->pragma_kind)
25098 case PRAGMA_OMP_ATOMIC:
25099 cp_parser_omp_atomic (parser, pragma_tok);
25101 case PRAGMA_OMP_CRITICAL:
25102 stmt = cp_parser_omp_critical (parser, pragma_tok);
25104 case PRAGMA_OMP_FOR:
25105 stmt = cp_parser_omp_for (parser, pragma_tok);
25107 case PRAGMA_OMP_MASTER:
25108 stmt = cp_parser_omp_master (parser, pragma_tok);
25110 case PRAGMA_OMP_ORDERED:
25111 stmt = cp_parser_omp_ordered (parser, pragma_tok);
25113 case PRAGMA_OMP_PARALLEL:
25114 stmt = cp_parser_omp_parallel (parser, pragma_tok);
25116 case PRAGMA_OMP_SECTIONS:
25117 stmt = cp_parser_omp_sections (parser, pragma_tok);
25119 case PRAGMA_OMP_SINGLE:
25120 stmt = cp_parser_omp_single (parser, pragma_tok);
25122 case PRAGMA_OMP_TASK:
25123 stmt = cp_parser_omp_task (parser, pragma_tok);
25126 gcc_unreachable ();
25130 SET_EXPR_LOCATION (stmt, pragma_tok->location);
25135 static GTY (()) cp_parser *the_parser;
25138 /* Special handling for the first token or line in the file. The first
25139 thing in the file might be #pragma GCC pch_preprocess, which loads a
25140 PCH file, which is a GC collection point. So we need to handle this
25141 first pragma without benefit of an existing lexer structure.
25143 Always returns one token to the caller in *FIRST_TOKEN. This is
25144 either the true first token of the file, or the first token after
25145 the initial pragma. */
25148 cp_parser_initial_pragma (cp_token *first_token)
25152 cp_lexer_get_preprocessor_token (NULL, first_token);
25153 if (first_token->pragma_kind != PRAGMA_GCC_PCH_PREPROCESS)
25156 cp_lexer_get_preprocessor_token (NULL, first_token);
25157 if (first_token->type == CPP_STRING)
25159 name = first_token->u.value;
25161 cp_lexer_get_preprocessor_token (NULL, first_token);
25162 if (first_token->type != CPP_PRAGMA_EOL)
25163 error_at (first_token->location,
25164 "junk at end of %<#pragma GCC pch_preprocess%>");
25167 error_at (first_token->location, "expected string literal");
25169 /* Skip to the end of the pragma. */
25170 while (first_token->type != CPP_PRAGMA_EOL && first_token->type != CPP_EOF)
25171 cp_lexer_get_preprocessor_token (NULL, first_token);
25173 /* Now actually load the PCH file. */
25175 c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name));
25177 /* Read one more token to return to our caller. We have to do this
25178 after reading the PCH file in, since its pointers have to be
25180 cp_lexer_get_preprocessor_token (NULL, first_token);
25183 /* Normal parsing of a pragma token. Here we can (and must) use the
25187 cp_parser_pragma (cp_parser *parser, enum pragma_context context)
25189 cp_token *pragma_tok;
25192 pragma_tok = cp_lexer_consume_token (parser->lexer);
25193 gcc_assert (pragma_tok->type == CPP_PRAGMA);
25194 parser->lexer->in_pragma = true;
25196 id = pragma_tok->pragma_kind;
25199 case PRAGMA_GCC_PCH_PREPROCESS:
25200 error_at (pragma_tok->location,
25201 "%<#pragma GCC pch_preprocess%> must be first");
25204 case PRAGMA_OMP_BARRIER:
25207 case pragma_compound:
25208 cp_parser_omp_barrier (parser, pragma_tok);
25211 error_at (pragma_tok->location, "%<#pragma omp barrier%> may only be "
25212 "used in compound statements");
25219 case PRAGMA_OMP_FLUSH:
25222 case pragma_compound:
25223 cp_parser_omp_flush (parser, pragma_tok);
25226 error_at (pragma_tok->location, "%<#pragma omp flush%> may only be "
25227 "used in compound statements");
25234 case PRAGMA_OMP_TASKWAIT:
25237 case pragma_compound:
25238 cp_parser_omp_taskwait (parser, pragma_tok);
25241 error_at (pragma_tok->location,
25242 "%<#pragma omp taskwait%> may only be "
25243 "used in compound statements");
25250 case PRAGMA_OMP_THREADPRIVATE:
25251 cp_parser_omp_threadprivate (parser, pragma_tok);
25254 case PRAGMA_OMP_ATOMIC:
25255 case PRAGMA_OMP_CRITICAL:
25256 case PRAGMA_OMP_FOR:
25257 case PRAGMA_OMP_MASTER:
25258 case PRAGMA_OMP_ORDERED:
25259 case PRAGMA_OMP_PARALLEL:
25260 case PRAGMA_OMP_SECTIONS:
25261 case PRAGMA_OMP_SINGLE:
25262 case PRAGMA_OMP_TASK:
25263 if (context == pragma_external)
25265 cp_parser_omp_construct (parser, pragma_tok);
25268 case PRAGMA_OMP_SECTION:
25269 error_at (pragma_tok->location,
25270 "%<#pragma omp section%> may only be used in "
25271 "%<#pragma omp sections%> construct");
25275 gcc_assert (id >= PRAGMA_FIRST_EXTERNAL);
25276 c_invoke_pragma_handler (id);
25280 cp_parser_error (parser, "expected declaration specifiers");
25284 cp_parser_skip_to_pragma_eol (parser, pragma_tok);
25288 /* The interface the pragma parsers have to the lexer. */
25291 pragma_lex (tree *value)
25294 enum cpp_ttype ret;
25296 tok = cp_lexer_peek_token (the_parser->lexer);
25299 *value = tok->u.value;
25301 if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF)
25303 else if (ret == CPP_STRING)
25304 *value = cp_parser_string_literal (the_parser, false, false);
25307 cp_lexer_consume_token (the_parser->lexer);
25308 if (ret == CPP_KEYWORD)
25316 /* External interface. */
25318 /* Parse one entire translation unit. */
25321 c_parse_file (void)
25323 static bool already_called = false;
25325 if (already_called)
25327 sorry ("inter-module optimizations not implemented for C++");
25330 already_called = true;
25332 the_parser = cp_parser_new ();
25333 push_deferring_access_checks (flag_access_control
25334 ? dk_no_deferred : dk_no_check);
25335 cp_parser_translation_unit (the_parser);
25339 #include "gt-cp-parser.h"