2 Copyright (C) 2000, 2001, 2002, 2003, 2004,
3 2005 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 2, 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 COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
25 #include "coretypes.h"
27 #include "dyn-string.h"
35 #include "diagnostic.h"
45 /* The cp_lexer_* routines mediate between the lexer proper (in libcpp
46 and c-lex.c) and the C++ parser. */
48 /* A token's value and its associated deferred access checks and
51 struct tree_check GTY(())
53 /* The value associated with the token. */
55 /* The checks that have been associated with value. */
56 VEC (deferred_access_check, gc)* checks;
57 /* The token's qualifying scope (used when it is a
58 CPP_NESTED_NAME_SPECIFIER). */
59 tree qualifying_scope;
64 typedef struct cp_token GTY (())
66 /* The kind of token. */
67 ENUM_BITFIELD (cpp_ttype) type : 8;
68 /* If this token is a keyword, this value indicates which keyword.
69 Otherwise, this value is RID_MAX. */
70 ENUM_BITFIELD (rid) keyword : 8;
73 /* Identifier for the pragma. */
74 ENUM_BITFIELD (pragma_kind) pragma_kind : 6;
75 /* True if this token is from a system header. */
76 BOOL_BITFIELD in_system_header : 1;
77 /* True if this token is from a context where it is implicitly extern "C" */
78 BOOL_BITFIELD implicit_extern_c : 1;
79 /* True for a CPP_NAME token that is not a keyword (i.e., for which
80 KEYWORD is RID_MAX) iff this name was looked up and found to be
81 ambiguous. An error has already been reported. */
82 BOOL_BITFIELD ambiguous_p : 1;
83 /* The input file stack index at which this token was found. */
84 unsigned input_file_stack_index : INPUT_FILE_STACK_BITS;
85 /* The value associated with this token, if any. */
86 union cp_token_value {
87 /* Used for CPP_NESTED_NAME_SPECIFIER and CPP_TEMPLATE_ID. */
88 struct tree_check* GTY((tag ("1"))) tree_check_value;
89 /* Use for all other tokens. */
90 tree GTY((tag ("0"))) value;
91 } GTY((desc ("(%1.type == CPP_TEMPLATE_ID) || (%1.type == CPP_NESTED_NAME_SPECIFIER)"))) u;
92 /* The location at which this token was found. */
96 /* We use a stack of token pointer for saving token sets. */
97 typedef struct cp_token *cp_token_position;
98 DEF_VEC_P (cp_token_position);
99 DEF_VEC_ALLOC_P (cp_token_position,heap);
101 static const cp_token eof_token =
103 CPP_EOF, RID_MAX, 0, PRAGMA_NONE, 0, 0, false, 0, { NULL },
104 #if USE_MAPPED_LOCATION
111 /* The cp_lexer structure represents the C++ lexer. It is responsible
112 for managing the token stream from the preprocessor and supplying
113 it to the parser. Tokens are never added to the cp_lexer after
116 typedef struct cp_lexer GTY (())
118 /* The memory allocated for the buffer. NULL if this lexer does not
119 own the token buffer. */
120 cp_token * GTY ((length ("%h.buffer_length"))) buffer;
121 /* If the lexer owns the buffer, this is the number of tokens in the
123 size_t buffer_length;
125 /* A pointer just past the last available token. The tokens
126 in this lexer are [buffer, last_token). */
127 cp_token_position GTY ((skip)) last_token;
129 /* The next available token. If NEXT_TOKEN is &eof_token, then there are
130 no more available tokens. */
131 cp_token_position GTY ((skip)) next_token;
133 /* A stack indicating positions at which cp_lexer_save_tokens was
134 called. The top entry is the most recent position at which we
135 began saving tokens. If the stack is non-empty, we are saving
137 VEC(cp_token_position,heap) *GTY ((skip)) saved_tokens;
139 /* The next lexer in a linked list of lexers. */
140 struct cp_lexer *next;
142 /* True if we should output debugging information. */
145 /* True if we're in the context of parsing a pragma, and should not
146 increment past the end-of-line marker. */
150 /* cp_token_cache is a range of tokens. There is no need to represent
151 allocate heap memory for it, since tokens are never removed from the
152 lexer's array. There is also no need for the GC to walk through
153 a cp_token_cache, since everything in here is referenced through
156 typedef struct cp_token_cache GTY(())
158 /* The beginning of the token range. */
159 cp_token * GTY((skip)) first;
161 /* Points immediately after the last token in the range. */
162 cp_token * GTY ((skip)) last;
167 static cp_lexer *cp_lexer_new_main
169 static cp_lexer *cp_lexer_new_from_tokens
170 (cp_token_cache *tokens);
171 static void cp_lexer_destroy
173 static int cp_lexer_saving_tokens
175 static cp_token_position cp_lexer_token_position
177 static cp_token *cp_lexer_token_at
178 (cp_lexer *, cp_token_position);
179 static void cp_lexer_get_preprocessor_token
180 (cp_lexer *, cp_token *);
181 static inline cp_token *cp_lexer_peek_token
183 static cp_token *cp_lexer_peek_nth_token
184 (cp_lexer *, size_t);
185 static inline bool cp_lexer_next_token_is
186 (cp_lexer *, enum cpp_ttype);
187 static bool cp_lexer_next_token_is_not
188 (cp_lexer *, enum cpp_ttype);
189 static bool cp_lexer_next_token_is_keyword
190 (cp_lexer *, enum rid);
191 static cp_token *cp_lexer_consume_token
193 static void cp_lexer_purge_token
195 static void cp_lexer_purge_tokens_after
196 (cp_lexer *, cp_token_position);
197 static void cp_lexer_save_tokens
199 static void cp_lexer_commit_tokens
201 static void cp_lexer_rollback_tokens
203 #ifdef ENABLE_CHECKING
204 static void cp_lexer_print_token
205 (FILE *, cp_token *);
206 static inline bool cp_lexer_debugging_p
208 static void cp_lexer_start_debugging
209 (cp_lexer *) ATTRIBUTE_UNUSED;
210 static void cp_lexer_stop_debugging
211 (cp_lexer *) ATTRIBUTE_UNUSED;
213 /* If we define cp_lexer_debug_stream to NULL it will provoke warnings
214 about passing NULL to functions that require non-NULL arguments
215 (fputs, fprintf). It will never be used, so all we need is a value
216 of the right type that's guaranteed not to be NULL. */
217 #define cp_lexer_debug_stream stdout
218 #define cp_lexer_print_token(str, tok) (void) 0
219 #define cp_lexer_debugging_p(lexer) 0
220 #endif /* ENABLE_CHECKING */
222 static cp_token_cache *cp_token_cache_new
223 (cp_token *, cp_token *);
225 static void cp_parser_initial_pragma
228 /* Manifest constants. */
229 #define CP_LEXER_BUFFER_SIZE ((256 * 1024) / sizeof (cp_token))
230 #define CP_SAVED_TOKEN_STACK 5
232 /* A token type for keywords, as opposed to ordinary identifiers. */
233 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
235 /* A token type for template-ids. If a template-id is processed while
236 parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
237 the value of the CPP_TEMPLATE_ID is whatever was returned by
238 cp_parser_template_id. */
239 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
241 /* A token type for nested-name-specifiers. If a
242 nested-name-specifier is processed while parsing tentatively, it is
243 replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
244 CPP_NESTED_NAME_SPECIFIER is whatever was returned by
245 cp_parser_nested_name_specifier_opt. */
246 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
248 /* A token type for tokens that are not tokens at all; these are used
249 to represent slots in the array where there used to be a token
250 that has now been deleted. */
251 #define CPP_PURGED ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
253 /* The number of token types, including C++-specific ones. */
254 #define N_CP_TTYPES ((int) (CPP_PURGED + 1))
258 #ifdef ENABLE_CHECKING
259 /* The stream to which debugging output should be written. */
260 static FILE *cp_lexer_debug_stream;
261 #endif /* ENABLE_CHECKING */
263 /* Create a new main C++ lexer, the lexer that gets tokens from the
267 cp_lexer_new_main (void)
269 cp_token first_token;
276 /* It's possible that parsing the first pragma will load a PCH file,
277 which is a GC collection point. So we have to do that before
278 allocating any memory. */
279 cp_parser_initial_pragma (&first_token);
281 /* Tell c_lex_with_flags not to merge string constants. */
282 c_lex_return_raw_strings = true;
284 c_common_no_more_pch ();
286 /* Allocate the memory. */
287 lexer = GGC_CNEW (cp_lexer);
289 #ifdef ENABLE_CHECKING
290 /* Initially we are not debugging. */
291 lexer->debugging_p = false;
292 #endif /* ENABLE_CHECKING */
293 lexer->saved_tokens = VEC_alloc (cp_token_position, heap,
294 CP_SAVED_TOKEN_STACK);
296 /* Create the buffer. */
297 alloc = CP_LEXER_BUFFER_SIZE;
298 buffer = GGC_NEWVEC (cp_token, alloc);
300 /* Put the first token in the buffer. */
305 /* Get the remaining tokens from the preprocessor. */
306 while (pos->type != CPP_EOF)
313 buffer = GGC_RESIZEVEC (cp_token, buffer, alloc);
314 pos = buffer + space;
316 cp_lexer_get_preprocessor_token (lexer, pos);
318 lexer->buffer = buffer;
319 lexer->buffer_length = alloc - space;
320 lexer->last_token = pos;
321 lexer->next_token = lexer->buffer_length ? buffer : (cp_token *)&eof_token;
323 /* Subsequent preprocessor diagnostics should use compiler
324 diagnostic functions to get the compiler source location. */
325 cpp_get_options (parse_in)->client_diagnostic = true;
326 cpp_get_callbacks (parse_in)->error = cp_cpp_error;
328 gcc_assert (lexer->next_token->type != CPP_PURGED);
332 /* Create a new lexer whose token stream is primed with the tokens in
333 CACHE. When these tokens are exhausted, no new tokens will be read. */
336 cp_lexer_new_from_tokens (cp_token_cache *cache)
338 cp_token *first = cache->first;
339 cp_token *last = cache->last;
340 cp_lexer *lexer = GGC_CNEW (cp_lexer);
342 /* We do not own the buffer. */
343 lexer->buffer = NULL;
344 lexer->buffer_length = 0;
345 lexer->next_token = first == last ? (cp_token *)&eof_token : first;
346 lexer->last_token = last;
348 lexer->saved_tokens = VEC_alloc (cp_token_position, heap,
349 CP_SAVED_TOKEN_STACK);
351 #ifdef ENABLE_CHECKING
352 /* Initially we are not debugging. */
353 lexer->debugging_p = false;
356 gcc_assert (lexer->next_token->type != CPP_PURGED);
360 /* Frees all resources associated with LEXER. */
363 cp_lexer_destroy (cp_lexer *lexer)
366 ggc_free (lexer->buffer);
367 VEC_free (cp_token_position, heap, lexer->saved_tokens);
371 /* Returns nonzero if debugging information should be output. */
373 #ifdef ENABLE_CHECKING
376 cp_lexer_debugging_p (cp_lexer *lexer)
378 return lexer->debugging_p;
381 #endif /* ENABLE_CHECKING */
383 static inline cp_token_position
384 cp_lexer_token_position (cp_lexer *lexer, bool previous_p)
386 gcc_assert (!previous_p || lexer->next_token != &eof_token);
388 return lexer->next_token - previous_p;
391 static inline cp_token *
392 cp_lexer_token_at (cp_lexer *lexer ATTRIBUTE_UNUSED, cp_token_position pos)
397 /* nonzero if we are presently saving tokens. */
400 cp_lexer_saving_tokens (const cp_lexer* lexer)
402 return VEC_length (cp_token_position, lexer->saved_tokens) != 0;
405 /* Store the next token from the preprocessor in *TOKEN. Return true
409 cp_lexer_get_preprocessor_token (cp_lexer *lexer ATTRIBUTE_UNUSED ,
412 static int is_extern_c = 0;
414 /* Get a new token from the preprocessor. */
416 = c_lex_with_flags (&token->u.value, &token->location, &token->flags);
417 token->input_file_stack_index = input_file_stack_tick;
418 token->keyword = RID_MAX;
419 token->pragma_kind = PRAGMA_NONE;
420 token->in_system_header = in_system_header;
422 /* On some systems, some header files are surrounded by an
423 implicit extern "C" block. Set a flag in the token if it
424 comes from such a header. */
425 is_extern_c += pending_lang_change;
426 pending_lang_change = 0;
427 token->implicit_extern_c = is_extern_c > 0;
429 /* Check to see if this token is a keyword. */
430 if (token->type == CPP_NAME)
432 if (C_IS_RESERVED_WORD (token->u.value))
434 /* Mark this token as a keyword. */
435 token->type = CPP_KEYWORD;
436 /* Record which keyword. */
437 token->keyword = C_RID_CODE (token->u.value);
438 /* Update the value. Some keywords are mapped to particular
439 entities, rather than simply having the value of the
440 corresponding IDENTIFIER_NODE. For example, `__const' is
441 mapped to `const'. */
442 token->u.value = ridpointers[token->keyword];
446 if (warn_cxx0x_compat
447 && C_RID_CODE (token->u.value) >= RID_FIRST_CXX0X
448 && C_RID_CODE (token->u.value) <= RID_LAST_CXX0X)
450 /* Warn about the C++0x keyword (but still treat it as
452 warning (OPT_Wc__0x_compat,
453 "identifier %<%s%> will become a keyword in C++0x",
454 IDENTIFIER_POINTER (token->u.value));
456 /* Clear out the C_RID_CODE so we don't warn about this
457 particular identifier-turned-keyword again. */
458 C_RID_CODE (token->u.value) = RID_MAX;
461 token->ambiguous_p = false;
462 token->keyword = RID_MAX;
465 /* Handle Objective-C++ keywords. */
466 else if (token->type == CPP_AT_NAME)
468 token->type = CPP_KEYWORD;
469 switch (C_RID_CODE (token->u.value))
471 /* Map 'class' to '@class', 'private' to '@private', etc. */
472 case RID_CLASS: token->keyword = RID_AT_CLASS; break;
473 case RID_PRIVATE: token->keyword = RID_AT_PRIVATE; break;
474 case RID_PROTECTED: token->keyword = RID_AT_PROTECTED; break;
475 case RID_PUBLIC: token->keyword = RID_AT_PUBLIC; break;
476 case RID_THROW: token->keyword = RID_AT_THROW; break;
477 case RID_TRY: token->keyword = RID_AT_TRY; break;
478 case RID_CATCH: token->keyword = RID_AT_CATCH; break;
479 default: token->keyword = C_RID_CODE (token->u.value);
482 else if (token->type == CPP_PRAGMA)
484 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
485 token->pragma_kind = TREE_INT_CST_LOW (token->u.value);
486 token->u.value = NULL_TREE;
490 /* Update the globals input_location and in_system_header and the
491 input file stack from TOKEN. */
493 cp_lexer_set_source_position_from_token (cp_token *token)
495 if (token->type != CPP_EOF)
497 input_location = token->location;
498 in_system_header = token->in_system_header;
499 restore_input_file_stack (token->input_file_stack_index);
503 /* Return a pointer to the next token in the token stream, but do not
506 static inline cp_token *
507 cp_lexer_peek_token (cp_lexer *lexer)
509 if (cp_lexer_debugging_p (lexer))
511 fputs ("cp_lexer: peeking at token: ", cp_lexer_debug_stream);
512 cp_lexer_print_token (cp_lexer_debug_stream, lexer->next_token);
513 putc ('\n', cp_lexer_debug_stream);
515 return lexer->next_token;
518 /* Return true if the next token has the indicated TYPE. */
521 cp_lexer_next_token_is (cp_lexer* lexer, enum cpp_ttype type)
523 return cp_lexer_peek_token (lexer)->type == type;
526 /* Return true if the next token does not have the indicated TYPE. */
529 cp_lexer_next_token_is_not (cp_lexer* lexer, enum cpp_ttype type)
531 return !cp_lexer_next_token_is (lexer, type);
534 /* Return true if the next token is the indicated KEYWORD. */
537 cp_lexer_next_token_is_keyword (cp_lexer* lexer, enum rid keyword)
539 return cp_lexer_peek_token (lexer)->keyword == keyword;
542 /* Return true if the next token is a keyword for a decl-specifier. */
545 cp_lexer_next_token_is_decl_specifier_keyword (cp_lexer *lexer)
549 token = cp_lexer_peek_token (lexer);
550 switch (token->keyword)
552 /* Storage classes. */
559 /* Elaborated type specifiers. */
565 /* Simple type specifiers. */
577 /* GNU extensions. */
587 /* Return a pointer to the Nth token in the token stream. If N is 1,
588 then this is precisely equivalent to cp_lexer_peek_token (except
589 that it is not inline). One would like to disallow that case, but
590 there is one case (cp_parser_nth_token_starts_template_id) where
591 the caller passes a variable for N and it might be 1. */
594 cp_lexer_peek_nth_token (cp_lexer* lexer, size_t n)
598 /* N is 1-based, not zero-based. */
601 if (cp_lexer_debugging_p (lexer))
602 fprintf (cp_lexer_debug_stream,
603 "cp_lexer: peeking ahead %ld at token: ", (long)n);
606 token = lexer->next_token;
607 gcc_assert (!n || token != &eof_token);
611 if (token == lexer->last_token)
613 token = (cp_token *)&eof_token;
617 if (token->type != CPP_PURGED)
621 if (cp_lexer_debugging_p (lexer))
623 cp_lexer_print_token (cp_lexer_debug_stream, token);
624 putc ('\n', cp_lexer_debug_stream);
630 /* Return the next token, and advance the lexer's next_token pointer
631 to point to the next non-purged token. */
634 cp_lexer_consume_token (cp_lexer* lexer)
636 cp_token *token = lexer->next_token;
638 gcc_assert (token != &eof_token);
639 gcc_assert (!lexer->in_pragma || token->type != CPP_PRAGMA_EOL);
644 if (lexer->next_token == lexer->last_token)
646 lexer->next_token = (cp_token *)&eof_token;
651 while (lexer->next_token->type == CPP_PURGED);
653 cp_lexer_set_source_position_from_token (token);
655 /* Provide debugging output. */
656 if (cp_lexer_debugging_p (lexer))
658 fputs ("cp_lexer: consuming token: ", cp_lexer_debug_stream);
659 cp_lexer_print_token (cp_lexer_debug_stream, token);
660 putc ('\n', cp_lexer_debug_stream);
666 /* Permanently remove the next token from the token stream, and
667 advance the next_token pointer to refer to the next non-purged
671 cp_lexer_purge_token (cp_lexer *lexer)
673 cp_token *tok = lexer->next_token;
675 gcc_assert (tok != &eof_token);
676 tok->type = CPP_PURGED;
677 tok->location = UNKNOWN_LOCATION;
678 tok->u.value = NULL_TREE;
679 tok->keyword = RID_MAX;
684 if (tok == lexer->last_token)
686 tok = (cp_token *)&eof_token;
690 while (tok->type == CPP_PURGED);
691 lexer->next_token = tok;
694 /* Permanently remove all tokens after TOK, up to, but not
695 including, the token that will be returned next by
696 cp_lexer_peek_token. */
699 cp_lexer_purge_tokens_after (cp_lexer *lexer, cp_token *tok)
701 cp_token *peek = lexer->next_token;
703 if (peek == &eof_token)
704 peek = lexer->last_token;
706 gcc_assert (tok < peek);
708 for ( tok += 1; tok != peek; tok += 1)
710 tok->type = CPP_PURGED;
711 tok->location = UNKNOWN_LOCATION;
712 tok->u.value = NULL_TREE;
713 tok->keyword = RID_MAX;
717 /* Begin saving tokens. All tokens consumed after this point will be
721 cp_lexer_save_tokens (cp_lexer* lexer)
723 /* Provide debugging output. */
724 if (cp_lexer_debugging_p (lexer))
725 fprintf (cp_lexer_debug_stream, "cp_lexer: saving tokens\n");
727 VEC_safe_push (cp_token_position, heap,
728 lexer->saved_tokens, lexer->next_token);
731 /* Commit to the portion of the token stream most recently saved. */
734 cp_lexer_commit_tokens (cp_lexer* lexer)
736 /* Provide debugging output. */
737 if (cp_lexer_debugging_p (lexer))
738 fprintf (cp_lexer_debug_stream, "cp_lexer: committing tokens\n");
740 VEC_pop (cp_token_position, lexer->saved_tokens);
743 /* Return all tokens saved since the last call to cp_lexer_save_tokens
744 to the token stream. Stop saving tokens. */
747 cp_lexer_rollback_tokens (cp_lexer* lexer)
749 /* Provide debugging output. */
750 if (cp_lexer_debugging_p (lexer))
751 fprintf (cp_lexer_debug_stream, "cp_lexer: restoring tokens\n");
753 lexer->next_token = VEC_pop (cp_token_position, lexer->saved_tokens);
756 /* Print a representation of the TOKEN on the STREAM. */
758 #ifdef ENABLE_CHECKING
761 cp_lexer_print_token (FILE * stream, cp_token *token)
763 /* We don't use cpp_type2name here because the parser defines
764 a few tokens of its own. */
765 static const char *const token_names[] = {
766 /* cpplib-defined token types */
772 /* C++ parser token types - see "Manifest constants", above. */
775 "NESTED_NAME_SPECIFIER",
779 /* If we have a name for the token, print it out. Otherwise, we
780 simply give the numeric code. */
781 gcc_assert (token->type < ARRAY_SIZE(token_names));
782 fputs (token_names[token->type], stream);
784 /* For some tokens, print the associated data. */
788 /* Some keywords have a value that is not an IDENTIFIER_NODE.
789 For example, `struct' is mapped to an INTEGER_CST. */
790 if (TREE_CODE (token->u.value) != IDENTIFIER_NODE)
792 /* else fall through */
794 fputs (IDENTIFIER_POINTER (token->u.value), stream);
799 fprintf (stream, " \"%s\"", TREE_STRING_POINTER (token->u.value));
807 /* Start emitting debugging information. */
810 cp_lexer_start_debugging (cp_lexer* lexer)
812 lexer->debugging_p = true;
815 /* Stop emitting debugging information. */
818 cp_lexer_stop_debugging (cp_lexer* lexer)
820 lexer->debugging_p = false;
823 #endif /* ENABLE_CHECKING */
825 /* Create a new cp_token_cache, representing a range of tokens. */
827 static cp_token_cache *
828 cp_token_cache_new (cp_token *first, cp_token *last)
830 cp_token_cache *cache = GGC_NEW (cp_token_cache);
831 cache->first = first;
837 /* Decl-specifiers. */
839 /* Set *DECL_SPECS to represent an empty decl-specifier-seq. */
842 clear_decl_specs (cp_decl_specifier_seq *decl_specs)
844 memset (decl_specs, 0, sizeof (cp_decl_specifier_seq));
849 /* Nothing other than the parser should be creating declarators;
850 declarators are a semi-syntactic representation of C++ entities.
851 Other parts of the front end that need to create entities (like
852 VAR_DECLs or FUNCTION_DECLs) should do that directly. */
854 static cp_declarator *make_call_declarator
855 (cp_declarator *, cp_parameter_declarator *, cp_cv_quals, tree);
856 static cp_declarator *make_array_declarator
857 (cp_declarator *, tree);
858 static cp_declarator *make_pointer_declarator
859 (cp_cv_quals, cp_declarator *);
860 static cp_declarator *make_reference_declarator
861 (cp_cv_quals, cp_declarator *);
862 static cp_parameter_declarator *make_parameter_declarator
863 (cp_decl_specifier_seq *, cp_declarator *, tree);
864 static cp_declarator *make_ptrmem_declarator
865 (cp_cv_quals, tree, cp_declarator *);
867 /* An erroneous declarator. */
868 static cp_declarator *cp_error_declarator;
870 /* The obstack on which declarators and related data structures are
872 static struct obstack declarator_obstack;
874 /* Alloc BYTES from the declarator memory pool. */
877 alloc_declarator (size_t bytes)
879 return obstack_alloc (&declarator_obstack, bytes);
882 /* Allocate a declarator of the indicated KIND. Clear fields that are
883 common to all declarators. */
885 static cp_declarator *
886 make_declarator (cp_declarator_kind kind)
888 cp_declarator *declarator;
890 declarator = (cp_declarator *) alloc_declarator (sizeof (cp_declarator));
891 declarator->kind = kind;
892 declarator->attributes = NULL_TREE;
893 declarator->declarator = NULL;
894 declarator->parameter_pack_p = false;
899 /* Make a declarator for a generalized identifier. If
900 QUALIFYING_SCOPE is non-NULL, the identifier is
901 QUALIFYING_SCOPE::UNQUALIFIED_NAME; otherwise, it is just
902 UNQUALIFIED_NAME. SFK indicates the kind of special function this
905 static cp_declarator *
906 make_id_declarator (tree qualifying_scope, tree unqualified_name,
907 special_function_kind sfk)
909 cp_declarator *declarator;
911 /* It is valid to write:
913 class C { void f(); };
917 The standard is not clear about whether `typedef const C D' is
918 legal; as of 2002-09-15 the committee is considering that
919 question. EDG 3.0 allows that syntax. Therefore, we do as
921 if (qualifying_scope && TYPE_P (qualifying_scope))
922 qualifying_scope = TYPE_MAIN_VARIANT (qualifying_scope);
924 gcc_assert (TREE_CODE (unqualified_name) == IDENTIFIER_NODE
925 || TREE_CODE (unqualified_name) == BIT_NOT_EXPR
926 || TREE_CODE (unqualified_name) == TEMPLATE_ID_EXPR);
928 declarator = make_declarator (cdk_id);
929 declarator->u.id.qualifying_scope = qualifying_scope;
930 declarator->u.id.unqualified_name = unqualified_name;
931 declarator->u.id.sfk = sfk;
936 /* Make a declarator for a pointer to TARGET. CV_QUALIFIERS is a list
937 of modifiers such as const or volatile to apply to the pointer
938 type, represented as identifiers. */
941 make_pointer_declarator (cp_cv_quals cv_qualifiers, cp_declarator *target)
943 cp_declarator *declarator;
945 declarator = make_declarator (cdk_pointer);
946 declarator->declarator = target;
947 declarator->u.pointer.qualifiers = cv_qualifiers;
948 declarator->u.pointer.class_type = NULL_TREE;
951 declarator->parameter_pack_p = target->parameter_pack_p;
952 target->parameter_pack_p = false;
955 declarator->parameter_pack_p = false;
960 /* Like make_pointer_declarator -- but for references. */
963 make_reference_declarator (cp_cv_quals cv_qualifiers, cp_declarator *target)
965 cp_declarator *declarator;
967 declarator = make_declarator (cdk_reference);
968 declarator->declarator = target;
969 declarator->u.pointer.qualifiers = cv_qualifiers;
970 declarator->u.pointer.class_type = NULL_TREE;
973 declarator->parameter_pack_p = target->parameter_pack_p;
974 target->parameter_pack_p = false;
977 declarator->parameter_pack_p = false;
982 /* Like make_pointer_declarator -- but for a pointer to a non-static
983 member of CLASS_TYPE. */
986 make_ptrmem_declarator (cp_cv_quals cv_qualifiers, tree class_type,
987 cp_declarator *pointee)
989 cp_declarator *declarator;
991 declarator = make_declarator (cdk_ptrmem);
992 declarator->declarator = pointee;
993 declarator->u.pointer.qualifiers = cv_qualifiers;
994 declarator->u.pointer.class_type = class_type;
998 declarator->parameter_pack_p = pointee->parameter_pack_p;
999 pointee->parameter_pack_p = false;
1002 declarator->parameter_pack_p = false;
1007 /* Make a declarator for the function given by TARGET, with the
1008 indicated PARMS. The CV_QUALIFIERS aply to the function, as in
1009 "const"-qualified member function. The EXCEPTION_SPECIFICATION
1010 indicates what exceptions can be thrown. */
1013 make_call_declarator (cp_declarator *target,
1014 cp_parameter_declarator *parms,
1015 cp_cv_quals cv_qualifiers,
1016 tree exception_specification)
1018 cp_declarator *declarator;
1020 declarator = make_declarator (cdk_function);
1021 declarator->declarator = target;
1022 declarator->u.function.parameters = parms;
1023 declarator->u.function.qualifiers = cv_qualifiers;
1024 declarator->u.function.exception_specification = exception_specification;
1027 declarator->parameter_pack_p = target->parameter_pack_p;
1028 target->parameter_pack_p = false;
1031 declarator->parameter_pack_p = false;
1036 /* Make a declarator for an array of BOUNDS elements, each of which is
1037 defined by ELEMENT. */
1040 make_array_declarator (cp_declarator *element, tree bounds)
1042 cp_declarator *declarator;
1044 declarator = make_declarator (cdk_array);
1045 declarator->declarator = element;
1046 declarator->u.array.bounds = bounds;
1049 declarator->parameter_pack_p = element->parameter_pack_p;
1050 element->parameter_pack_p = false;
1053 declarator->parameter_pack_p = false;
1058 /* Determine whether the declarator we've seen so far can be a
1059 parameter pack, when followed by an ellipsis. */
1061 declarator_can_be_parameter_pack (cp_declarator *declarator)
1063 /* Search for a declarator name, or any other declarator that goes
1064 after the point where the ellipsis could appear in a parameter
1065 pack. If we find any of these, then this declarator can not be
1066 made into a parameter pack. */
1068 while (declarator && !found)
1070 switch ((int)declarator->kind)
1080 declarator = declarator->declarator;
1088 cp_parameter_declarator *no_parameters;
1090 /* Create a parameter declarator with the indicated DECL_SPECIFIERS,
1091 DECLARATOR and DEFAULT_ARGUMENT. */
1093 cp_parameter_declarator *
1094 make_parameter_declarator (cp_decl_specifier_seq *decl_specifiers,
1095 cp_declarator *declarator,
1096 tree default_argument)
1098 cp_parameter_declarator *parameter;
1100 parameter = ((cp_parameter_declarator *)
1101 alloc_declarator (sizeof (cp_parameter_declarator)));
1102 parameter->next = NULL;
1103 if (decl_specifiers)
1104 parameter->decl_specifiers = *decl_specifiers;
1106 clear_decl_specs (¶meter->decl_specifiers);
1107 parameter->declarator = declarator;
1108 parameter->default_argument = default_argument;
1109 parameter->ellipsis_p = false;
1114 /* Returns true iff DECLARATOR is a declaration for a function. */
1117 function_declarator_p (const cp_declarator *declarator)
1121 if (declarator->kind == cdk_function
1122 && declarator->declarator->kind == cdk_id)
1124 if (declarator->kind == cdk_id
1125 || declarator->kind == cdk_error)
1127 declarator = declarator->declarator;
1137 A cp_parser parses the token stream as specified by the C++
1138 grammar. Its job is purely parsing, not semantic analysis. For
1139 example, the parser breaks the token stream into declarators,
1140 expressions, statements, and other similar syntactic constructs.
1141 It does not check that the types of the expressions on either side
1142 of an assignment-statement are compatible, or that a function is
1143 not declared with a parameter of type `void'.
1145 The parser invokes routines elsewhere in the compiler to perform
1146 semantic analysis and to build up the abstract syntax tree for the
1149 The parser (and the template instantiation code, which is, in a
1150 way, a close relative of parsing) are the only parts of the
1151 compiler that should be calling push_scope and pop_scope, or
1152 related functions. The parser (and template instantiation code)
1153 keeps track of what scope is presently active; everything else
1154 should simply honor that. (The code that generates static
1155 initializers may also need to set the scope, in order to check
1156 access control correctly when emitting the initializers.)
1161 The parser is of the standard recursive-descent variety. Upcoming
1162 tokens in the token stream are examined in order to determine which
1163 production to use when parsing a non-terminal. Some C++ constructs
1164 require arbitrary look ahead to disambiguate. For example, it is
1165 impossible, in the general case, to tell whether a statement is an
1166 expression or declaration without scanning the entire statement.
1167 Therefore, the parser is capable of "parsing tentatively." When the
1168 parser is not sure what construct comes next, it enters this mode.
1169 Then, while we attempt to parse the construct, the parser queues up
1170 error messages, rather than issuing them immediately, and saves the
1171 tokens it consumes. If the construct is parsed successfully, the
1172 parser "commits", i.e., it issues any queued error messages and
1173 the tokens that were being preserved are permanently discarded.
1174 If, however, the construct is not parsed successfully, the parser
1175 rolls back its state completely so that it can resume parsing using
1176 a different alternative.
1181 The performance of the parser could probably be improved substantially.
1182 We could often eliminate the need to parse tentatively by looking ahead
1183 a little bit. In some places, this approach might not entirely eliminate
1184 the need to parse tentatively, but it might still speed up the average
1187 /* Flags that are passed to some parsing functions. These values can
1188 be bitwise-ored together. */
1190 typedef enum cp_parser_flags
1193 CP_PARSER_FLAGS_NONE = 0x0,
1194 /* The construct is optional. If it is not present, then no error
1195 should be issued. */
1196 CP_PARSER_FLAGS_OPTIONAL = 0x1,
1197 /* When parsing a type-specifier, do not allow user-defined types. */
1198 CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES = 0x2
1201 /* The different kinds of declarators we want to parse. */
1203 typedef enum cp_parser_declarator_kind
1205 /* We want an abstract declarator. */
1206 CP_PARSER_DECLARATOR_ABSTRACT,
1207 /* We want a named declarator. */
1208 CP_PARSER_DECLARATOR_NAMED,
1209 /* We don't mind, but the name must be an unqualified-id. */
1210 CP_PARSER_DECLARATOR_EITHER
1211 } cp_parser_declarator_kind;
1213 /* The precedence values used to parse binary expressions. The minimum value
1214 of PREC must be 1, because zero is reserved to quickly discriminate
1215 binary operators from other tokens. */
1220 PREC_LOGICAL_OR_EXPRESSION,
1221 PREC_LOGICAL_AND_EXPRESSION,
1222 PREC_INCLUSIVE_OR_EXPRESSION,
1223 PREC_EXCLUSIVE_OR_EXPRESSION,
1224 PREC_AND_EXPRESSION,
1225 PREC_EQUALITY_EXPRESSION,
1226 PREC_RELATIONAL_EXPRESSION,
1227 PREC_SHIFT_EXPRESSION,
1228 PREC_ADDITIVE_EXPRESSION,
1229 PREC_MULTIPLICATIVE_EXPRESSION,
1231 NUM_PREC_VALUES = PREC_PM_EXPRESSION
1234 /* A mapping from a token type to a corresponding tree node type, with a
1235 precedence value. */
1237 typedef struct cp_parser_binary_operations_map_node
1239 /* The token type. */
1240 enum cpp_ttype token_type;
1241 /* The corresponding tree code. */
1242 enum tree_code tree_type;
1243 /* The precedence of this operator. */
1244 enum cp_parser_prec prec;
1245 } cp_parser_binary_operations_map_node;
1247 /* The status of a tentative parse. */
1249 typedef enum cp_parser_status_kind
1251 /* No errors have occurred. */
1252 CP_PARSER_STATUS_KIND_NO_ERROR,
1253 /* An error has occurred. */
1254 CP_PARSER_STATUS_KIND_ERROR,
1255 /* We are committed to this tentative parse, whether or not an error
1257 CP_PARSER_STATUS_KIND_COMMITTED
1258 } cp_parser_status_kind;
1260 typedef struct cp_parser_expression_stack_entry
1262 /* Left hand side of the binary operation we are currently
1265 /* Original tree code for left hand side, if it was a binary
1266 expression itself (used for -Wparentheses). */
1267 enum tree_code lhs_type;
1268 /* Tree code for the binary operation we are parsing. */
1269 enum tree_code tree_type;
1270 /* Precedence of the binary operation we are parsing. */
1272 } cp_parser_expression_stack_entry;
1274 /* The stack for storing partial expressions. We only need NUM_PREC_VALUES
1275 entries because precedence levels on the stack are monotonically
1277 typedef struct cp_parser_expression_stack_entry
1278 cp_parser_expression_stack[NUM_PREC_VALUES];
1280 /* Context that is saved and restored when parsing tentatively. */
1281 typedef struct cp_parser_context GTY (())
1283 /* If this is a tentative parsing context, the status of the
1285 enum cp_parser_status_kind status;
1286 /* If non-NULL, we have just seen a `x->' or `x.' expression. Names
1287 that are looked up in this context must be looked up both in the
1288 scope given by OBJECT_TYPE (the type of `x' or `*x') and also in
1289 the context of the containing expression. */
1292 /* The next parsing context in the stack. */
1293 struct cp_parser_context *next;
1294 } cp_parser_context;
1298 /* Constructors and destructors. */
1300 static cp_parser_context *cp_parser_context_new
1301 (cp_parser_context *);
1303 /* Class variables. */
1305 static GTY((deletable)) cp_parser_context* cp_parser_context_free_list;
1307 /* The operator-precedence table used by cp_parser_binary_expression.
1308 Transformed into an associative array (binops_by_token) by
1311 static const cp_parser_binary_operations_map_node binops[] = {
1312 { CPP_DEREF_STAR, MEMBER_REF, PREC_PM_EXPRESSION },
1313 { CPP_DOT_STAR, DOTSTAR_EXPR, PREC_PM_EXPRESSION },
1315 { CPP_MULT, MULT_EXPR, PREC_MULTIPLICATIVE_EXPRESSION },
1316 { CPP_DIV, TRUNC_DIV_EXPR, PREC_MULTIPLICATIVE_EXPRESSION },
1317 { CPP_MOD, TRUNC_MOD_EXPR, PREC_MULTIPLICATIVE_EXPRESSION },
1319 { CPP_PLUS, PLUS_EXPR, PREC_ADDITIVE_EXPRESSION },
1320 { CPP_MINUS, MINUS_EXPR, PREC_ADDITIVE_EXPRESSION },
1322 { CPP_LSHIFT, LSHIFT_EXPR, PREC_SHIFT_EXPRESSION },
1323 { CPP_RSHIFT, RSHIFT_EXPR, PREC_SHIFT_EXPRESSION },
1325 { CPP_LESS, LT_EXPR, PREC_RELATIONAL_EXPRESSION },
1326 { CPP_GREATER, GT_EXPR, PREC_RELATIONAL_EXPRESSION },
1327 { CPP_LESS_EQ, LE_EXPR, PREC_RELATIONAL_EXPRESSION },
1328 { CPP_GREATER_EQ, GE_EXPR, PREC_RELATIONAL_EXPRESSION },
1330 { CPP_EQ_EQ, EQ_EXPR, PREC_EQUALITY_EXPRESSION },
1331 { CPP_NOT_EQ, NE_EXPR, PREC_EQUALITY_EXPRESSION },
1333 { CPP_AND, BIT_AND_EXPR, PREC_AND_EXPRESSION },
1335 { CPP_XOR, BIT_XOR_EXPR, PREC_EXCLUSIVE_OR_EXPRESSION },
1337 { CPP_OR, BIT_IOR_EXPR, PREC_INCLUSIVE_OR_EXPRESSION },
1339 { CPP_AND_AND, TRUTH_ANDIF_EXPR, PREC_LOGICAL_AND_EXPRESSION },
1341 { CPP_OR_OR, TRUTH_ORIF_EXPR, PREC_LOGICAL_OR_EXPRESSION }
1344 /* The same as binops, but initialized by cp_parser_new so that
1345 binops_by_token[N].token_type == N. Used in cp_parser_binary_expression
1347 static cp_parser_binary_operations_map_node binops_by_token[N_CP_TTYPES];
1349 /* Constructors and destructors. */
1351 /* Construct a new context. The context below this one on the stack
1352 is given by NEXT. */
1354 static cp_parser_context *
1355 cp_parser_context_new (cp_parser_context* next)
1357 cp_parser_context *context;
1359 /* Allocate the storage. */
1360 if (cp_parser_context_free_list != NULL)
1362 /* Pull the first entry from the free list. */
1363 context = cp_parser_context_free_list;
1364 cp_parser_context_free_list = context->next;
1365 memset (context, 0, sizeof (*context));
1368 context = GGC_CNEW (cp_parser_context);
1370 /* No errors have occurred yet in this context. */
1371 context->status = CP_PARSER_STATUS_KIND_NO_ERROR;
1372 /* If this is not the bottomost context, copy information that we
1373 need from the previous context. */
1376 /* If, in the NEXT context, we are parsing an `x->' or `x.'
1377 expression, then we are parsing one in this context, too. */
1378 context->object_type = next->object_type;
1379 /* Thread the stack. */
1380 context->next = next;
1386 /* The cp_parser structure represents the C++ parser. */
1388 typedef struct cp_parser GTY(())
1390 /* The lexer from which we are obtaining tokens. */
1393 /* The scope in which names should be looked up. If NULL_TREE, then
1394 we look up names in the scope that is currently open in the
1395 source program. If non-NULL, this is either a TYPE or
1396 NAMESPACE_DECL for the scope in which we should look. It can
1397 also be ERROR_MARK, when we've parsed a bogus scope.
1399 This value is not cleared automatically after a name is looked
1400 up, so we must be careful to clear it before starting a new look
1401 up sequence. (If it is not cleared, then `X::Y' followed by `Z'
1402 will look up `Z' in the scope of `X', rather than the current
1403 scope.) Unfortunately, it is difficult to tell when name lookup
1404 is complete, because we sometimes peek at a token, look it up,
1405 and then decide not to consume it. */
1408 /* OBJECT_SCOPE and QUALIFYING_SCOPE give the scopes in which the
1409 last lookup took place. OBJECT_SCOPE is used if an expression
1410 like "x->y" or "x.y" was used; it gives the type of "*x" or "x",
1411 respectively. QUALIFYING_SCOPE is used for an expression of the
1412 form "X::Y"; it refers to X. */
1414 tree qualifying_scope;
1416 /* A stack of parsing contexts. All but the bottom entry on the
1417 stack will be tentative contexts.
1419 We parse tentatively in order to determine which construct is in
1420 use in some situations. For example, in order to determine
1421 whether a statement is an expression-statement or a
1422 declaration-statement we parse it tentatively as a
1423 declaration-statement. If that fails, we then reparse the same
1424 token stream as an expression-statement. */
1425 cp_parser_context *context;
1427 /* True if we are parsing GNU C++. If this flag is not set, then
1428 GNU extensions are not recognized. */
1429 bool allow_gnu_extensions_p;
1431 /* TRUE if the `>' token should be interpreted as the greater-than
1432 operator. FALSE if it is the end of a template-id or
1433 template-parameter-list. In C++0x mode, this flag also applies to
1434 `>>' tokens, which are viewed as two consecutive `>' tokens when
1435 this flag is FALSE. */
1436 bool greater_than_is_operator_p;
1438 /* TRUE if default arguments are allowed within a parameter list
1439 that starts at this point. FALSE if only a gnu extension makes
1440 them permissible. */
1441 bool default_arg_ok_p;
1443 /* TRUE if we are parsing an integral constant-expression. See
1444 [expr.const] for a precise definition. */
1445 bool integral_constant_expression_p;
1447 /* TRUE if we are parsing an integral constant-expression -- but a
1448 non-constant expression should be permitted as well. This flag
1449 is used when parsing an array bound so that GNU variable-length
1450 arrays are tolerated. */
1451 bool allow_non_integral_constant_expression_p;
1453 /* TRUE if ALLOW_NON_CONSTANT_EXPRESSION_P is TRUE and something has
1454 been seen that makes the expression non-constant. */
1455 bool non_integral_constant_expression_p;
1457 /* TRUE if local variable names and `this' are forbidden in the
1459 bool local_variables_forbidden_p;
1461 /* TRUE if the declaration we are parsing is part of a
1462 linkage-specification of the form `extern string-literal
1464 bool in_unbraced_linkage_specification_p;
1466 /* TRUE if we are presently parsing a declarator, after the
1467 direct-declarator. */
1468 bool in_declarator_p;
1470 /* TRUE if we are presently parsing a template-argument-list. */
1471 bool in_template_argument_list_p;
1473 /* Set to IN_ITERATION_STMT if parsing an iteration-statement,
1474 to IN_OMP_BLOCK if parsing OpenMP structured block and
1475 IN_OMP_FOR if parsing OpenMP loop. If parsing a switch statement,
1476 this is bitwise ORed with IN_SWITCH_STMT, unless parsing an
1477 iteration-statement, OpenMP block or loop within that switch. */
1478 #define IN_SWITCH_STMT 1
1479 #define IN_ITERATION_STMT 2
1480 #define IN_OMP_BLOCK 4
1481 #define IN_OMP_FOR 8
1482 #define IN_IF_STMT 16
1483 unsigned char in_statement;
1485 /* TRUE if we are presently parsing the body of a switch statement.
1486 Note that this doesn't quite overlap with in_statement above.
1487 The difference relates to giving the right sets of error messages:
1488 "case not in switch" vs "break statement used with OpenMP...". */
1489 bool in_switch_statement_p;
1491 /* TRUE if we are parsing a type-id in an expression context. In
1492 such a situation, both "type (expr)" and "type (type)" are valid
1494 bool in_type_id_in_expr_p;
1496 /* TRUE if we are currently in a header file where declarations are
1497 implicitly extern "C". */
1498 bool implicit_extern_c;
1500 /* TRUE if strings in expressions should be translated to the execution
1502 bool translate_strings_p;
1504 /* TRUE if we are presently parsing the body of a function, but not
1506 bool in_function_body;
1508 /* If non-NULL, then we are parsing a construct where new type
1509 definitions are not permitted. The string stored here will be
1510 issued as an error message if a type is defined. */
1511 const char *type_definition_forbidden_message;
1513 /* A list of lists. The outer list is a stack, used for member
1514 functions of local classes. At each level there are two sub-list,
1515 one on TREE_VALUE and one on TREE_PURPOSE. Each of those
1516 sub-lists has a FUNCTION_DECL or TEMPLATE_DECL on their
1517 TREE_VALUE's. The functions are chained in reverse declaration
1520 The TREE_PURPOSE sublist contains those functions with default
1521 arguments that need post processing, and the TREE_VALUE sublist
1522 contains those functions with definitions that need post
1525 These lists can only be processed once the outermost class being
1526 defined is complete. */
1527 tree unparsed_functions_queues;
1529 /* The number of classes whose definitions are currently in
1531 unsigned num_classes_being_defined;
1533 /* The number of template parameter lists that apply directly to the
1534 current declaration. */
1535 unsigned num_template_parameter_lists;
1540 /* Constructors and destructors. */
1542 static cp_parser *cp_parser_new
1545 /* Routines to parse various constructs.
1547 Those that return `tree' will return the error_mark_node (rather
1548 than NULL_TREE) if a parse error occurs, unless otherwise noted.
1549 Sometimes, they will return an ordinary node if error-recovery was
1550 attempted, even though a parse error occurred. So, to check
1551 whether or not a parse error occurred, you should always use
1552 cp_parser_error_occurred. If the construct is optional (indicated
1553 either by an `_opt' in the name of the function that does the
1554 parsing or via a FLAGS parameter), then NULL_TREE is returned if
1555 the construct is not present. */
1557 /* Lexical conventions [gram.lex] */
1559 static tree cp_parser_identifier
1561 static tree cp_parser_string_literal
1562 (cp_parser *, bool, bool);
1564 /* Basic concepts [gram.basic] */
1566 static bool cp_parser_translation_unit
1569 /* Expressions [gram.expr] */
1571 static tree cp_parser_primary_expression
1572 (cp_parser *, bool, bool, bool, cp_id_kind *);
1573 static tree cp_parser_id_expression
1574 (cp_parser *, bool, bool, bool *, bool, bool);
1575 static tree cp_parser_unqualified_id
1576 (cp_parser *, bool, bool, bool, bool);
1577 static tree cp_parser_nested_name_specifier_opt
1578 (cp_parser *, bool, bool, bool, bool);
1579 static tree cp_parser_nested_name_specifier
1580 (cp_parser *, bool, bool, bool, bool);
1581 static tree cp_parser_class_or_namespace_name
1582 (cp_parser *, bool, bool, bool, bool, bool);
1583 static tree cp_parser_postfix_expression
1584 (cp_parser *, bool, bool);
1585 static tree cp_parser_postfix_open_square_expression
1586 (cp_parser *, tree, bool);
1587 static tree cp_parser_postfix_dot_deref_expression
1588 (cp_parser *, enum cpp_ttype, tree, bool, cp_id_kind *);
1589 static tree cp_parser_parenthesized_expression_list
1590 (cp_parser *, bool, bool, bool, bool *);
1591 static void cp_parser_pseudo_destructor_name
1592 (cp_parser *, tree *, tree *);
1593 static tree cp_parser_unary_expression
1594 (cp_parser *, bool, bool);
1595 static enum tree_code cp_parser_unary_operator
1597 static tree cp_parser_new_expression
1599 static tree cp_parser_new_placement
1601 static tree cp_parser_new_type_id
1602 (cp_parser *, tree *);
1603 static cp_declarator *cp_parser_new_declarator_opt
1605 static cp_declarator *cp_parser_direct_new_declarator
1607 static tree cp_parser_new_initializer
1609 static tree cp_parser_delete_expression
1611 static tree cp_parser_cast_expression
1612 (cp_parser *, bool, bool);
1613 static tree cp_parser_binary_expression
1614 (cp_parser *, bool);
1615 static tree cp_parser_question_colon_clause
1616 (cp_parser *, tree);
1617 static tree cp_parser_assignment_expression
1618 (cp_parser *, bool);
1619 static enum tree_code cp_parser_assignment_operator_opt
1621 static tree cp_parser_expression
1622 (cp_parser *, bool);
1623 static tree cp_parser_constant_expression
1624 (cp_parser *, bool, bool *);
1625 static tree cp_parser_builtin_offsetof
1628 /* Statements [gram.stmt.stmt] */
1630 static void cp_parser_statement
1631 (cp_parser *, tree, bool, bool *);
1632 static void cp_parser_label_for_labeled_statement
1634 static tree cp_parser_expression_statement
1635 (cp_parser *, tree);
1636 static tree cp_parser_compound_statement
1637 (cp_parser *, tree, bool);
1638 static void cp_parser_statement_seq_opt
1639 (cp_parser *, tree);
1640 static tree cp_parser_selection_statement
1641 (cp_parser *, bool *);
1642 static tree cp_parser_condition
1644 static tree cp_parser_iteration_statement
1646 static void cp_parser_for_init_statement
1648 static tree cp_parser_jump_statement
1650 static void cp_parser_declaration_statement
1653 static tree cp_parser_implicitly_scoped_statement
1654 (cp_parser *, bool *);
1655 static void cp_parser_already_scoped_statement
1658 /* Declarations [gram.dcl.dcl] */
1660 static void cp_parser_declaration_seq_opt
1662 static void cp_parser_declaration
1664 static void cp_parser_block_declaration
1665 (cp_parser *, bool);
1666 static void cp_parser_simple_declaration
1667 (cp_parser *, bool);
1668 static void cp_parser_decl_specifier_seq
1669 (cp_parser *, cp_parser_flags, cp_decl_specifier_seq *, int *);
1670 static tree cp_parser_storage_class_specifier_opt
1672 static tree cp_parser_function_specifier_opt
1673 (cp_parser *, cp_decl_specifier_seq *);
1674 static tree cp_parser_type_specifier
1675 (cp_parser *, cp_parser_flags, cp_decl_specifier_seq *, bool,
1677 static tree cp_parser_simple_type_specifier
1678 (cp_parser *, cp_decl_specifier_seq *, cp_parser_flags);
1679 static tree cp_parser_type_name
1681 static tree cp_parser_elaborated_type_specifier
1682 (cp_parser *, bool, bool);
1683 static tree cp_parser_enum_specifier
1685 static void cp_parser_enumerator_list
1686 (cp_parser *, tree);
1687 static void cp_parser_enumerator_definition
1688 (cp_parser *, tree);
1689 static tree cp_parser_namespace_name
1691 static void cp_parser_namespace_definition
1693 static void cp_parser_namespace_body
1695 static tree cp_parser_qualified_namespace_specifier
1697 static void cp_parser_namespace_alias_definition
1699 static bool cp_parser_using_declaration
1700 (cp_parser *, bool);
1701 static void cp_parser_using_directive
1703 static void cp_parser_asm_definition
1705 static void cp_parser_linkage_specification
1707 static void cp_parser_static_assert
1708 (cp_parser *, bool);
1710 /* Declarators [gram.dcl.decl] */
1712 static tree cp_parser_init_declarator
1713 (cp_parser *, cp_decl_specifier_seq *, VEC (deferred_access_check,gc)*, bool, bool, int, bool *);
1714 static cp_declarator *cp_parser_declarator
1715 (cp_parser *, cp_parser_declarator_kind, int *, bool *, bool);
1716 static cp_declarator *cp_parser_direct_declarator
1717 (cp_parser *, cp_parser_declarator_kind, int *, bool);
1718 static enum tree_code cp_parser_ptr_operator
1719 (cp_parser *, tree *, cp_cv_quals *);
1720 static cp_cv_quals cp_parser_cv_qualifier_seq_opt
1722 static tree cp_parser_declarator_id
1723 (cp_parser *, bool);
1724 static tree cp_parser_type_id
1726 static void cp_parser_type_specifier_seq
1727 (cp_parser *, bool, cp_decl_specifier_seq *);
1728 static cp_parameter_declarator *cp_parser_parameter_declaration_clause
1730 static cp_parameter_declarator *cp_parser_parameter_declaration_list
1731 (cp_parser *, bool *);
1732 static cp_parameter_declarator *cp_parser_parameter_declaration
1733 (cp_parser *, bool, bool *);
1734 static void cp_parser_function_body
1736 static tree cp_parser_initializer
1737 (cp_parser *, bool *, bool *);
1738 static tree cp_parser_initializer_clause
1739 (cp_parser *, bool *);
1740 static VEC(constructor_elt,gc) *cp_parser_initializer_list
1741 (cp_parser *, bool *);
1743 static bool cp_parser_ctor_initializer_opt_and_function_body
1746 /* Classes [gram.class] */
1748 static tree cp_parser_class_name
1749 (cp_parser *, bool, bool, enum tag_types, bool, bool, bool);
1750 static tree cp_parser_class_specifier
1752 static tree cp_parser_class_head
1753 (cp_parser *, bool *, tree *, tree *);
1754 static enum tag_types cp_parser_class_key
1756 static void cp_parser_member_specification_opt
1758 static void cp_parser_member_declaration
1760 static tree cp_parser_pure_specifier
1762 static tree cp_parser_constant_initializer
1765 /* Derived classes [gram.class.derived] */
1767 static tree cp_parser_base_clause
1769 static tree cp_parser_base_specifier
1772 /* Special member functions [gram.special] */
1774 static tree cp_parser_conversion_function_id
1776 static tree cp_parser_conversion_type_id
1778 static cp_declarator *cp_parser_conversion_declarator_opt
1780 static bool cp_parser_ctor_initializer_opt
1782 static void cp_parser_mem_initializer_list
1784 static tree cp_parser_mem_initializer
1786 static tree cp_parser_mem_initializer_id
1789 /* Overloading [gram.over] */
1791 static tree cp_parser_operator_function_id
1793 static tree cp_parser_operator
1796 /* Templates [gram.temp] */
1798 static void cp_parser_template_declaration
1799 (cp_parser *, bool);
1800 static tree cp_parser_template_parameter_list
1802 static tree cp_parser_template_parameter
1803 (cp_parser *, bool *, bool *);
1804 static tree cp_parser_type_parameter
1805 (cp_parser *, bool *);
1806 static tree cp_parser_template_id
1807 (cp_parser *, bool, bool, bool);
1808 static tree cp_parser_template_name
1809 (cp_parser *, bool, bool, bool, bool *);
1810 static tree cp_parser_template_argument_list
1812 static tree cp_parser_template_argument
1814 static void cp_parser_explicit_instantiation
1816 static void cp_parser_explicit_specialization
1819 /* Exception handling [gram.exception] */
1821 static tree cp_parser_try_block
1823 static bool cp_parser_function_try_block
1825 static void cp_parser_handler_seq
1827 static void cp_parser_handler
1829 static tree cp_parser_exception_declaration
1831 static tree cp_parser_throw_expression
1833 static tree cp_parser_exception_specification_opt
1835 static tree cp_parser_type_id_list
1838 /* GNU Extensions */
1840 static tree cp_parser_asm_specification_opt
1842 static tree cp_parser_asm_operand_list
1844 static tree cp_parser_asm_clobber_list
1846 static tree cp_parser_attributes_opt
1848 static tree cp_parser_attribute_list
1850 static bool cp_parser_extension_opt
1851 (cp_parser *, int *);
1852 static void cp_parser_label_declaration
1855 enum pragma_context { pragma_external, pragma_stmt, pragma_compound };
1856 static bool cp_parser_pragma
1857 (cp_parser *, enum pragma_context);
1859 /* Objective-C++ Productions */
1861 static tree cp_parser_objc_message_receiver
1863 static tree cp_parser_objc_message_args
1865 static tree cp_parser_objc_message_expression
1867 static tree cp_parser_objc_encode_expression
1869 static tree cp_parser_objc_defs_expression
1871 static tree cp_parser_objc_protocol_expression
1873 static tree cp_parser_objc_selector_expression
1875 static tree cp_parser_objc_expression
1877 static bool cp_parser_objc_selector_p
1879 static tree cp_parser_objc_selector
1881 static tree cp_parser_objc_protocol_refs_opt
1883 static void cp_parser_objc_declaration
1885 static tree cp_parser_objc_statement
1888 /* Utility Routines */
1890 static tree cp_parser_lookup_name
1891 (cp_parser *, tree, enum tag_types, bool, bool, bool, tree *);
1892 static tree cp_parser_lookup_name_simple
1893 (cp_parser *, tree);
1894 static tree cp_parser_maybe_treat_template_as_class
1896 static bool cp_parser_check_declarator_template_parameters
1897 (cp_parser *, cp_declarator *);
1898 static bool cp_parser_check_template_parameters
1899 (cp_parser *, unsigned);
1900 static tree cp_parser_simple_cast_expression
1902 static tree cp_parser_global_scope_opt
1903 (cp_parser *, bool);
1904 static bool cp_parser_constructor_declarator_p
1905 (cp_parser *, bool);
1906 static tree cp_parser_function_definition_from_specifiers_and_declarator
1907 (cp_parser *, cp_decl_specifier_seq *, tree, const cp_declarator *);
1908 static tree cp_parser_function_definition_after_declarator
1909 (cp_parser *, bool);
1910 static void cp_parser_template_declaration_after_export
1911 (cp_parser *, bool);
1912 static void cp_parser_perform_template_parameter_access_checks
1913 (VEC (deferred_access_check,gc)*);
1914 static tree cp_parser_single_declaration
1915 (cp_parser *, VEC (deferred_access_check,gc)*, bool, bool *);
1916 static tree cp_parser_functional_cast
1917 (cp_parser *, tree);
1918 static tree cp_parser_save_member_function_body
1919 (cp_parser *, cp_decl_specifier_seq *, cp_declarator *, tree);
1920 static tree cp_parser_enclosed_template_argument_list
1922 static void cp_parser_save_default_args
1923 (cp_parser *, tree);
1924 static void cp_parser_late_parsing_for_member
1925 (cp_parser *, tree);
1926 static void cp_parser_late_parsing_default_args
1927 (cp_parser *, tree);
1928 static tree cp_parser_sizeof_operand
1929 (cp_parser *, enum rid);
1930 static tree cp_parser_trait_expr
1931 (cp_parser *, enum rid);
1932 static bool cp_parser_declares_only_class_p
1934 static void cp_parser_set_storage_class
1935 (cp_parser *, cp_decl_specifier_seq *, enum rid);
1936 static void cp_parser_set_decl_spec_type
1937 (cp_decl_specifier_seq *, tree, bool);
1938 static bool cp_parser_friend_p
1939 (const cp_decl_specifier_seq *);
1940 static cp_token *cp_parser_require
1941 (cp_parser *, enum cpp_ttype, const char *);
1942 static cp_token *cp_parser_require_keyword
1943 (cp_parser *, enum rid, const char *);
1944 static bool cp_parser_token_starts_function_definition_p
1946 static bool cp_parser_next_token_starts_class_definition_p
1948 static bool cp_parser_next_token_ends_template_argument_p
1950 static bool cp_parser_nth_token_starts_template_argument_list_p
1951 (cp_parser *, size_t);
1952 static enum tag_types cp_parser_token_is_class_key
1954 static void cp_parser_check_class_key
1955 (enum tag_types, tree type);
1956 static void cp_parser_check_access_in_redeclaration
1958 static bool cp_parser_optional_template_keyword
1960 static void cp_parser_pre_parsed_nested_name_specifier
1962 static void cp_parser_cache_group
1963 (cp_parser *, enum cpp_ttype, unsigned);
1964 static void cp_parser_parse_tentatively
1966 static void cp_parser_commit_to_tentative_parse
1968 static void cp_parser_abort_tentative_parse
1970 static bool cp_parser_parse_definitely
1972 static inline bool cp_parser_parsing_tentatively
1974 static bool cp_parser_uncommitted_to_tentative_parse_p
1976 static void cp_parser_error
1977 (cp_parser *, const char *);
1978 static void cp_parser_name_lookup_error
1979 (cp_parser *, tree, tree, const char *);
1980 static bool cp_parser_simulate_error
1982 static bool cp_parser_check_type_definition
1984 static void cp_parser_check_for_definition_in_return_type
1985 (cp_declarator *, tree);
1986 static void cp_parser_check_for_invalid_template_id
1987 (cp_parser *, tree);
1988 static bool cp_parser_non_integral_constant_expression
1989 (cp_parser *, const char *);
1990 static void cp_parser_diagnose_invalid_type_name
1991 (cp_parser *, tree, tree);
1992 static bool cp_parser_parse_and_diagnose_invalid_type_name
1994 static int cp_parser_skip_to_closing_parenthesis
1995 (cp_parser *, bool, bool, bool);
1996 static void cp_parser_skip_to_end_of_statement
1998 static void cp_parser_consume_semicolon_at_end_of_statement
2000 static void cp_parser_skip_to_end_of_block_or_statement
2002 static void cp_parser_skip_to_closing_brace
2004 static void cp_parser_skip_to_end_of_template_parameter_list
2006 static void cp_parser_skip_to_pragma_eol
2007 (cp_parser*, cp_token *);
2008 static bool cp_parser_error_occurred
2010 static bool cp_parser_allow_gnu_extensions_p
2012 static bool cp_parser_is_string_literal
2014 static bool cp_parser_is_keyword
2015 (cp_token *, enum rid);
2016 static tree cp_parser_make_typename_type
2017 (cp_parser *, tree, tree);
2019 /* Returns nonzero if we are parsing tentatively. */
2022 cp_parser_parsing_tentatively (cp_parser* parser)
2024 return parser->context->next != NULL;
2027 /* Returns nonzero if TOKEN is a string literal. */
2030 cp_parser_is_string_literal (cp_token* token)
2032 return (token->type == CPP_STRING || token->type == CPP_WSTRING);
2035 /* Returns nonzero if TOKEN is the indicated KEYWORD. */
2038 cp_parser_is_keyword (cp_token* token, enum rid keyword)
2040 return token->keyword == keyword;
2043 /* If not parsing tentatively, issue a diagnostic of the form
2044 FILE:LINE: MESSAGE before TOKEN
2045 where TOKEN is the next token in the input stream. MESSAGE
2046 (specified by the caller) is usually of the form "expected
2050 cp_parser_error (cp_parser* parser, const char* message)
2052 if (!cp_parser_simulate_error (parser))
2054 cp_token *token = cp_lexer_peek_token (parser->lexer);
2055 /* This diagnostic makes more sense if it is tagged to the line
2056 of the token we just peeked at. */
2057 cp_lexer_set_source_position_from_token (token);
2059 if (token->type == CPP_PRAGMA)
2061 error ("%<#pragma%> is not allowed here");
2062 cp_parser_skip_to_pragma_eol (parser, token);
2066 c_parse_error (message,
2067 /* Because c_parser_error does not understand
2068 CPP_KEYWORD, keywords are treated like
2070 (token->type == CPP_KEYWORD ? CPP_NAME : token->type),
2075 /* Issue an error about name-lookup failing. NAME is the
2076 IDENTIFIER_NODE DECL is the result of
2077 the lookup (as returned from cp_parser_lookup_name). DESIRED is
2078 the thing that we hoped to find. */
2081 cp_parser_name_lookup_error (cp_parser* parser,
2084 const char* desired)
2086 /* If name lookup completely failed, tell the user that NAME was not
2088 if (decl == error_mark_node)
2090 if (parser->scope && parser->scope != global_namespace)
2091 error ("%<%E::%E%> has not been declared",
2092 parser->scope, name);
2093 else if (parser->scope == global_namespace)
2094 error ("%<::%E%> has not been declared", name);
2095 else if (parser->object_scope
2096 && !CLASS_TYPE_P (parser->object_scope))
2097 error ("request for member %qE in non-class type %qT",
2098 name, parser->object_scope);
2099 else if (parser->object_scope)
2100 error ("%<%T::%E%> has not been declared",
2101 parser->object_scope, name);
2103 error ("%qE has not been declared", name);
2105 else if (parser->scope && parser->scope != global_namespace)
2106 error ("%<%E::%E%> %s", parser->scope, name, desired);
2107 else if (parser->scope == global_namespace)
2108 error ("%<::%E%> %s", name, desired);
2110 error ("%qE %s", name, desired);
2113 /* If we are parsing tentatively, remember that an error has occurred
2114 during this tentative parse. Returns true if the error was
2115 simulated; false if a message should be issued by the caller. */
2118 cp_parser_simulate_error (cp_parser* parser)
2120 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
2122 parser->context->status = CP_PARSER_STATUS_KIND_ERROR;
2128 /* Check for repeated decl-specifiers. */
2131 cp_parser_check_decl_spec (cp_decl_specifier_seq *decl_specs)
2135 for (ds = ds_first; ds != ds_last; ++ds)
2137 unsigned count = decl_specs->specs[(int)ds];
2140 /* The "long" specifier is a special case because of "long long". */
2144 error ("%<long long long%> is too long for GCC");
2145 else if (pedantic && !in_system_header && warn_long_long)
2146 pedwarn ("ISO C++ does not support %<long long%>");
2150 static const char *const decl_spec_names[] = {
2166 error ("duplicate %qs", decl_spec_names[(int)ds]);
2171 /* This function is called when a type is defined. If type
2172 definitions are forbidden at this point, an error message is
2176 cp_parser_check_type_definition (cp_parser* parser)
2178 /* If types are forbidden here, issue a message. */
2179 if (parser->type_definition_forbidden_message)
2181 /* Use `%s' to print the string in case there are any escape
2182 characters in the message. */
2183 error ("%s", parser->type_definition_forbidden_message);
2189 /* This function is called when the DECLARATOR is processed. The TYPE
2190 was a type defined in the decl-specifiers. If it is invalid to
2191 define a type in the decl-specifiers for DECLARATOR, an error is
2195 cp_parser_check_for_definition_in_return_type (cp_declarator *declarator,
2198 /* [dcl.fct] forbids type definitions in return types.
2199 Unfortunately, it's not easy to know whether or not we are
2200 processing a return type until after the fact. */
2202 && (declarator->kind == cdk_pointer
2203 || declarator->kind == cdk_reference
2204 || declarator->kind == cdk_ptrmem))
2205 declarator = declarator->declarator;
2207 && declarator->kind == cdk_function)
2209 error ("new types may not be defined in a return type");
2210 inform ("(perhaps a semicolon is missing after the definition of %qT)",
2215 /* A type-specifier (TYPE) has been parsed which cannot be followed by
2216 "<" in any valid C++ program. If the next token is indeed "<",
2217 issue a message warning the user about what appears to be an
2218 invalid attempt to form a template-id. */
2221 cp_parser_check_for_invalid_template_id (cp_parser* parser,
2224 cp_token_position start = 0;
2226 if (cp_lexer_next_token_is (parser->lexer, CPP_LESS))
2229 error ("%qT is not a template", type);
2230 else if (TREE_CODE (type) == IDENTIFIER_NODE)
2231 error ("%qE is not a template", type);
2233 error ("invalid template-id");
2234 /* Remember the location of the invalid "<". */
2235 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
2236 start = cp_lexer_token_position (parser->lexer, true);
2237 /* Consume the "<". */
2238 cp_lexer_consume_token (parser->lexer);
2239 /* Parse the template arguments. */
2240 cp_parser_enclosed_template_argument_list (parser);
2241 /* Permanently remove the invalid template arguments so that
2242 this error message is not issued again. */
2244 cp_lexer_purge_tokens_after (parser->lexer, start);
2248 /* If parsing an integral constant-expression, issue an error message
2249 about the fact that THING appeared and return true. Otherwise,
2250 return false. In either case, set
2251 PARSER->NON_INTEGRAL_CONSTANT_EXPRESSION_P. */
2254 cp_parser_non_integral_constant_expression (cp_parser *parser,
2257 parser->non_integral_constant_expression_p = true;
2258 if (parser->integral_constant_expression_p)
2260 if (!parser->allow_non_integral_constant_expression_p)
2262 error ("%s cannot appear in a constant-expression", thing);
2269 /* Emit a diagnostic for an invalid type name. SCOPE is the
2270 qualifying scope (or NULL, if none) for ID. This function commits
2271 to the current active tentative parse, if any. (Otherwise, the
2272 problematic construct might be encountered again later, resulting
2273 in duplicate error messages.) */
2276 cp_parser_diagnose_invalid_type_name (cp_parser *parser, tree scope, tree id)
2278 tree decl, old_scope;
2279 /* Try to lookup the identifier. */
2280 old_scope = parser->scope;
2281 parser->scope = scope;
2282 decl = cp_parser_lookup_name_simple (parser, id);
2283 parser->scope = old_scope;
2284 /* If the lookup found a template-name, it means that the user forgot
2285 to specify an argument list. Emit a useful error message. */
2286 if (TREE_CODE (decl) == TEMPLATE_DECL)
2287 error ("invalid use of template-name %qE without an argument list", decl);
2288 else if (TREE_CODE (id) == BIT_NOT_EXPR)
2289 error ("invalid use of destructor %qD as a type", id);
2290 else if (TREE_CODE (decl) == TYPE_DECL)
2291 /* Something like 'unsigned A a;' */
2292 error ("invalid combination of multiple type-specifiers");
2293 else if (!parser->scope)
2295 /* Issue an error message. */
2296 error ("%qE does not name a type", id);
2297 /* If we're in a template class, it's possible that the user was
2298 referring to a type from a base class. For example:
2300 template <typename T> struct A { typedef T X; };
2301 template <typename T> struct B : public A<T> { X x; };
2303 The user should have said "typename A<T>::X". */
2304 if (processing_template_decl && current_class_type
2305 && TYPE_BINFO (current_class_type))
2309 for (b = TREE_CHAIN (TYPE_BINFO (current_class_type));
2313 tree base_type = BINFO_TYPE (b);
2314 if (CLASS_TYPE_P (base_type)
2315 && dependent_type_p (base_type))
2318 /* Go from a particular instantiation of the
2319 template (which will have an empty TYPE_FIELDs),
2320 to the main version. */
2321 base_type = CLASSTYPE_PRIMARY_TEMPLATE_TYPE (base_type);
2322 for (field = TYPE_FIELDS (base_type);
2324 field = TREE_CHAIN (field))
2325 if (TREE_CODE (field) == TYPE_DECL
2326 && DECL_NAME (field) == id)
2328 inform ("(perhaps %<typename %T::%E%> was intended)",
2329 BINFO_TYPE (b), id);
2338 /* Here we diagnose qualified-ids where the scope is actually correct,
2339 but the identifier does not resolve to a valid type name. */
2340 else if (parser->scope != error_mark_node)
2342 if (TREE_CODE (parser->scope) == NAMESPACE_DECL)
2343 error ("%qE in namespace %qE does not name a type",
2345 else if (TYPE_P (parser->scope))
2346 error ("%qE in class %qT does not name a type", id, parser->scope);
2350 cp_parser_commit_to_tentative_parse (parser);
2353 /* Check for a common situation where a type-name should be present,
2354 but is not, and issue a sensible error message. Returns true if an
2355 invalid type-name was detected.
2357 The situation handled by this function are variable declarations of the
2358 form `ID a', where `ID' is an id-expression and `a' is a plain identifier.
2359 Usually, `ID' should name a type, but if we got here it means that it
2360 does not. We try to emit the best possible error message depending on
2361 how exactly the id-expression looks like. */
2364 cp_parser_parse_and_diagnose_invalid_type_name (cp_parser *parser)
2368 cp_parser_parse_tentatively (parser);
2369 id = cp_parser_id_expression (parser,
2370 /*template_keyword_p=*/false,
2371 /*check_dependency_p=*/true,
2372 /*template_p=*/NULL,
2373 /*declarator_p=*/true,
2374 /*optional_p=*/false);
2375 /* After the id-expression, there should be a plain identifier,
2376 otherwise this is not a simple variable declaration. Also, if
2377 the scope is dependent, we cannot do much. */
2378 if (!cp_lexer_next_token_is (parser->lexer, CPP_NAME)
2379 || (parser->scope && TYPE_P (parser->scope)
2380 && dependent_type_p (parser->scope))
2381 || TREE_CODE (id) == TYPE_DECL)
2383 cp_parser_abort_tentative_parse (parser);
2386 if (!cp_parser_parse_definitely (parser))
2389 /* Emit a diagnostic for the invalid type. */
2390 cp_parser_diagnose_invalid_type_name (parser, parser->scope, id);
2391 /* Skip to the end of the declaration; there's no point in
2392 trying to process it. */
2393 cp_parser_skip_to_end_of_block_or_statement (parser);
2397 /* Consume tokens up to, and including, the next non-nested closing `)'.
2398 Returns 1 iff we found a closing `)'. RECOVERING is true, if we
2399 are doing error recovery. Returns -1 if OR_COMMA is true and we
2400 found an unnested comma. */
2403 cp_parser_skip_to_closing_parenthesis (cp_parser *parser,
2408 unsigned paren_depth = 0;
2409 unsigned brace_depth = 0;
2411 if (recovering && !or_comma
2412 && cp_parser_uncommitted_to_tentative_parse_p (parser))
2417 cp_token * token = cp_lexer_peek_token (parser->lexer);
2419 switch (token->type)
2422 case CPP_PRAGMA_EOL:
2423 /* If we've run out of tokens, then there is no closing `)'. */
2427 /* This matches the processing in skip_to_end_of_statement. */
2432 case CPP_OPEN_BRACE:
2435 case CPP_CLOSE_BRACE:
2441 if (recovering && or_comma && !brace_depth && !paren_depth)
2445 case CPP_OPEN_PAREN:
2450 case CPP_CLOSE_PAREN:
2451 if (!brace_depth && !paren_depth--)
2454 cp_lexer_consume_token (parser->lexer);
2463 /* Consume the token. */
2464 cp_lexer_consume_token (parser->lexer);
2468 /* Consume tokens until we reach the end of the current statement.
2469 Normally, that will be just before consuming a `;'. However, if a
2470 non-nested `}' comes first, then we stop before consuming that. */
2473 cp_parser_skip_to_end_of_statement (cp_parser* parser)
2475 unsigned nesting_depth = 0;
2479 cp_token *token = cp_lexer_peek_token (parser->lexer);
2481 switch (token->type)
2484 case CPP_PRAGMA_EOL:
2485 /* If we've run out of tokens, stop. */
2489 /* If the next token is a `;', we have reached the end of the
2495 case CPP_CLOSE_BRACE:
2496 /* If this is a non-nested '}', stop before consuming it.
2497 That way, when confronted with something like:
2501 we stop before consuming the closing '}', even though we
2502 have not yet reached a `;'. */
2503 if (nesting_depth == 0)
2506 /* If it is the closing '}' for a block that we have
2507 scanned, stop -- but only after consuming the token.
2513 we will stop after the body of the erroneously declared
2514 function, but before consuming the following `typedef'
2516 if (--nesting_depth == 0)
2518 cp_lexer_consume_token (parser->lexer);
2522 case CPP_OPEN_BRACE:
2530 /* Consume the token. */
2531 cp_lexer_consume_token (parser->lexer);
2535 /* This function is called at the end of a statement or declaration.
2536 If the next token is a semicolon, it is consumed; otherwise, error
2537 recovery is attempted. */
2540 cp_parser_consume_semicolon_at_end_of_statement (cp_parser *parser)
2542 /* Look for the trailing `;'. */
2543 if (!cp_parser_require (parser, CPP_SEMICOLON, "`;'"))
2545 /* If there is additional (erroneous) input, skip to the end of
2547 cp_parser_skip_to_end_of_statement (parser);
2548 /* If the next token is now a `;', consume it. */
2549 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
2550 cp_lexer_consume_token (parser->lexer);
2554 /* Skip tokens until we have consumed an entire block, or until we
2555 have consumed a non-nested `;'. */
2558 cp_parser_skip_to_end_of_block_or_statement (cp_parser* parser)
2560 int nesting_depth = 0;
2562 while (nesting_depth >= 0)
2564 cp_token *token = cp_lexer_peek_token (parser->lexer);
2566 switch (token->type)
2569 case CPP_PRAGMA_EOL:
2570 /* If we've run out of tokens, stop. */
2574 /* Stop if this is an unnested ';'. */
2579 case CPP_CLOSE_BRACE:
2580 /* Stop if this is an unnested '}', or closes the outermost
2587 case CPP_OPEN_BRACE:
2596 /* Consume the token. */
2597 cp_lexer_consume_token (parser->lexer);
2601 /* Skip tokens until a non-nested closing curly brace is the next
2605 cp_parser_skip_to_closing_brace (cp_parser *parser)
2607 unsigned nesting_depth = 0;
2611 cp_token *token = cp_lexer_peek_token (parser->lexer);
2613 switch (token->type)
2616 case CPP_PRAGMA_EOL:
2617 /* If we've run out of tokens, stop. */
2620 case CPP_CLOSE_BRACE:
2621 /* If the next token is a non-nested `}', then we have reached
2622 the end of the current block. */
2623 if (nesting_depth-- == 0)
2627 case CPP_OPEN_BRACE:
2628 /* If it the next token is a `{', then we are entering a new
2629 block. Consume the entire block. */
2637 /* Consume the token. */
2638 cp_lexer_consume_token (parser->lexer);
2642 /* Consume tokens until we reach the end of the pragma. The PRAGMA_TOK
2643 parameter is the PRAGMA token, allowing us to purge the entire pragma
2647 cp_parser_skip_to_pragma_eol (cp_parser* parser, cp_token *pragma_tok)
2651 parser->lexer->in_pragma = false;
2654 token = cp_lexer_consume_token (parser->lexer);
2655 while (token->type != CPP_PRAGMA_EOL && token->type != CPP_EOF);
2657 /* Ensure that the pragma is not parsed again. */
2658 cp_lexer_purge_tokens_after (parser->lexer, pragma_tok);
2661 /* Require pragma end of line, resyncing with it as necessary. The
2662 arguments are as for cp_parser_skip_to_pragma_eol. */
2665 cp_parser_require_pragma_eol (cp_parser *parser, cp_token *pragma_tok)
2667 parser->lexer->in_pragma = false;
2668 if (!cp_parser_require (parser, CPP_PRAGMA_EOL, "end of line"))
2669 cp_parser_skip_to_pragma_eol (parser, pragma_tok);
2672 /* This is a simple wrapper around make_typename_type. When the id is
2673 an unresolved identifier node, we can provide a superior diagnostic
2674 using cp_parser_diagnose_invalid_type_name. */
2677 cp_parser_make_typename_type (cp_parser *parser, tree scope, tree id)
2680 if (TREE_CODE (id) == IDENTIFIER_NODE)
2682 result = make_typename_type (scope, id, typename_type,
2683 /*complain=*/tf_none);
2684 if (result == error_mark_node)
2685 cp_parser_diagnose_invalid_type_name (parser, scope, id);
2688 return make_typename_type (scope, id, typename_type, tf_error);
2692 /* Create a new C++ parser. */
2695 cp_parser_new (void)
2701 /* cp_lexer_new_main is called before calling ggc_alloc because
2702 cp_lexer_new_main might load a PCH file. */
2703 lexer = cp_lexer_new_main ();
2705 /* Initialize the binops_by_token so that we can get the tree
2706 directly from the token. */
2707 for (i = 0; i < sizeof (binops) / sizeof (binops[0]); i++)
2708 binops_by_token[binops[i].token_type] = binops[i];
2710 parser = GGC_CNEW (cp_parser);
2711 parser->lexer = lexer;
2712 parser->context = cp_parser_context_new (NULL);
2714 /* For now, we always accept GNU extensions. */
2715 parser->allow_gnu_extensions_p = 1;
2717 /* The `>' token is a greater-than operator, not the end of a
2719 parser->greater_than_is_operator_p = true;
2721 parser->default_arg_ok_p = true;
2723 /* We are not parsing a constant-expression. */
2724 parser->integral_constant_expression_p = false;
2725 parser->allow_non_integral_constant_expression_p = false;
2726 parser->non_integral_constant_expression_p = false;
2728 /* Local variable names are not forbidden. */
2729 parser->local_variables_forbidden_p = false;
2731 /* We are not processing an `extern "C"' declaration. */
2732 parser->in_unbraced_linkage_specification_p = false;
2734 /* We are not processing a declarator. */
2735 parser->in_declarator_p = false;
2737 /* We are not processing a template-argument-list. */
2738 parser->in_template_argument_list_p = false;
2740 /* We are not in an iteration statement. */
2741 parser->in_statement = 0;
2743 /* We are not in a switch statement. */
2744 parser->in_switch_statement_p = false;
2746 /* We are not parsing a type-id inside an expression. */
2747 parser->in_type_id_in_expr_p = false;
2749 /* Declarations aren't implicitly extern "C". */
2750 parser->implicit_extern_c = false;
2752 /* String literals should be translated to the execution character set. */
2753 parser->translate_strings_p = true;
2755 /* We are not parsing a function body. */
2756 parser->in_function_body = false;
2758 /* The unparsed function queue is empty. */
2759 parser->unparsed_functions_queues = build_tree_list (NULL_TREE, NULL_TREE);
2761 /* There are no classes being defined. */
2762 parser->num_classes_being_defined = 0;
2764 /* No template parameters apply. */
2765 parser->num_template_parameter_lists = 0;
2770 /* Create a cp_lexer structure which will emit the tokens in CACHE
2771 and push it onto the parser's lexer stack. This is used for delayed
2772 parsing of in-class method bodies and default arguments, and should
2773 not be confused with tentative parsing. */
2775 cp_parser_push_lexer_for_tokens (cp_parser *parser, cp_token_cache *cache)
2777 cp_lexer *lexer = cp_lexer_new_from_tokens (cache);
2778 lexer->next = parser->lexer;
2779 parser->lexer = lexer;
2781 /* Move the current source position to that of the first token in the
2783 cp_lexer_set_source_position_from_token (lexer->next_token);
2786 /* Pop the top lexer off the parser stack. This is never used for the
2787 "main" lexer, only for those pushed by cp_parser_push_lexer_for_tokens. */
2789 cp_parser_pop_lexer (cp_parser *parser)
2791 cp_lexer *lexer = parser->lexer;
2792 parser->lexer = lexer->next;
2793 cp_lexer_destroy (lexer);
2795 /* Put the current source position back where it was before this
2796 lexer was pushed. */
2797 cp_lexer_set_source_position_from_token (parser->lexer->next_token);
2800 /* Lexical conventions [gram.lex] */
2802 /* Parse an identifier. Returns an IDENTIFIER_NODE representing the
2806 cp_parser_identifier (cp_parser* parser)
2810 /* Look for the identifier. */
2811 token = cp_parser_require (parser, CPP_NAME, "identifier");
2812 /* Return the value. */
2813 return token ? token->u.value : error_mark_node;
2816 /* Parse a sequence of adjacent string constants. Returns a
2817 TREE_STRING representing the combined, nul-terminated string
2818 constant. If TRANSLATE is true, translate the string to the
2819 execution character set. If WIDE_OK is true, a wide string is
2822 C++98 [lex.string] says that if a narrow string literal token is
2823 adjacent to a wide string literal token, the behavior is undefined.
2824 However, C99 6.4.5p4 says that this results in a wide string literal.
2825 We follow C99 here, for consistency with the C front end.
2827 This code is largely lifted from lex_string() in c-lex.c.
2829 FUTURE: ObjC++ will need to handle @-strings here. */
2831 cp_parser_string_literal (cp_parser *parser, bool translate, bool wide_ok)
2836 struct obstack str_ob;
2837 cpp_string str, istr, *strs;
2840 tok = cp_lexer_peek_token (parser->lexer);
2841 if (!cp_parser_is_string_literal (tok))
2843 cp_parser_error (parser, "expected string-literal");
2844 return error_mark_node;
2847 /* Try to avoid the overhead of creating and destroying an obstack
2848 for the common case of just one string. */
2849 if (!cp_parser_is_string_literal
2850 (cp_lexer_peek_nth_token (parser->lexer, 2)))
2852 cp_lexer_consume_token (parser->lexer);
2854 str.text = (const unsigned char *)TREE_STRING_POINTER (tok->u.value);
2855 str.len = TREE_STRING_LENGTH (tok->u.value);
2857 if (tok->type == CPP_WSTRING)
2864 gcc_obstack_init (&str_ob);
2869 cp_lexer_consume_token (parser->lexer);
2871 str.text = (unsigned char *)TREE_STRING_POINTER (tok->u.value);
2872 str.len = TREE_STRING_LENGTH (tok->u.value);
2873 if (tok->type == CPP_WSTRING)
2876 obstack_grow (&str_ob, &str, sizeof (cpp_string));
2878 tok = cp_lexer_peek_token (parser->lexer);
2880 while (cp_parser_is_string_literal (tok));
2882 strs = (cpp_string *) obstack_finish (&str_ob);
2885 if (wide && !wide_ok)
2887 cp_parser_error (parser, "a wide string is invalid in this context");
2891 if ((translate ? cpp_interpret_string : cpp_interpret_string_notranslate)
2892 (parse_in, strs, count, &istr, wide))
2894 value = build_string (istr.len, (char *)istr.text);
2895 free ((void *)istr.text);
2897 TREE_TYPE (value) = wide ? wchar_array_type_node : char_array_type_node;
2898 value = fix_string_type (value);
2901 /* cpp_interpret_string has issued an error. */
2902 value = error_mark_node;
2905 obstack_free (&str_ob, 0);
2911 /* Basic concepts [gram.basic] */
2913 /* Parse a translation-unit.
2916 declaration-seq [opt]
2918 Returns TRUE if all went well. */
2921 cp_parser_translation_unit (cp_parser* parser)
2923 /* The address of the first non-permanent object on the declarator
2925 static void *declarator_obstack_base;
2929 /* Create the declarator obstack, if necessary. */
2930 if (!cp_error_declarator)
2932 gcc_obstack_init (&declarator_obstack);
2933 /* Create the error declarator. */
2934 cp_error_declarator = make_declarator (cdk_error);
2935 /* Create the empty parameter list. */
2936 no_parameters = make_parameter_declarator (NULL, NULL, NULL_TREE);
2937 /* Remember where the base of the declarator obstack lies. */
2938 declarator_obstack_base = obstack_next_free (&declarator_obstack);
2941 cp_parser_declaration_seq_opt (parser);
2943 /* If there are no tokens left then all went well. */
2944 if (cp_lexer_next_token_is (parser->lexer, CPP_EOF))
2946 /* Get rid of the token array; we don't need it any more. */
2947 cp_lexer_destroy (parser->lexer);
2948 parser->lexer = NULL;
2950 /* This file might have been a context that's implicitly extern
2951 "C". If so, pop the lang context. (Only relevant for PCH.) */
2952 if (parser->implicit_extern_c)
2954 pop_lang_context ();
2955 parser->implicit_extern_c = false;
2959 finish_translation_unit ();
2965 cp_parser_error (parser, "expected declaration");
2969 /* Make sure the declarator obstack was fully cleaned up. */
2970 gcc_assert (obstack_next_free (&declarator_obstack)
2971 == declarator_obstack_base);
2973 /* All went well. */
2977 /* Expressions [gram.expr] */
2979 /* Parse a primary-expression.
2990 ( compound-statement )
2991 __builtin_va_arg ( assignment-expression , type-id )
2992 __builtin_offsetof ( type-id , offsetof-expression )
2995 __has_nothrow_assign ( type-id )
2996 __has_nothrow_constructor ( type-id )
2997 __has_nothrow_copy ( type-id )
2998 __has_trivial_assign ( type-id )
2999 __has_trivial_constructor ( type-id )
3000 __has_trivial_copy ( type-id )
3001 __has_trivial_destructor ( type-id )
3002 __has_virtual_destructor ( type-id )
3003 __is_abstract ( type-id )
3004 __is_base_of ( type-id , type-id )
3005 __is_class ( type-id )
3006 __is_convertible_to ( type-id , type-id )
3007 __is_empty ( type-id )
3008 __is_enum ( type-id )
3009 __is_pod ( type-id )
3010 __is_polymorphic ( type-id )
3011 __is_union ( type-id )
3013 Objective-C++ Extension:
3021 ADDRESS_P is true iff this expression was immediately preceded by
3022 "&" and therefore might denote a pointer-to-member. CAST_P is true
3023 iff this expression is the target of a cast. TEMPLATE_ARG_P is
3024 true iff this expression is a template argument.
3026 Returns a representation of the expression. Upon return, *IDK
3027 indicates what kind of id-expression (if any) was present. */
3030 cp_parser_primary_expression (cp_parser *parser,
3033 bool template_arg_p,
3038 /* Assume the primary expression is not an id-expression. */
3039 *idk = CP_ID_KIND_NONE;
3041 /* Peek at the next token. */
3042 token = cp_lexer_peek_token (parser->lexer);
3043 switch (token->type)
3054 token = cp_lexer_consume_token (parser->lexer);
3055 /* Floating-point literals are only allowed in an integral
3056 constant expression if they are cast to an integral or
3057 enumeration type. */
3058 if (TREE_CODE (token->u.value) == REAL_CST
3059 && parser->integral_constant_expression_p
3062 /* CAST_P will be set even in invalid code like "int(2.7 +
3063 ...)". Therefore, we have to check that the next token
3064 is sure to end the cast. */
3067 cp_token *next_token;
3069 next_token = cp_lexer_peek_token (parser->lexer);
3070 if (/* The comma at the end of an
3071 enumerator-definition. */
3072 next_token->type != CPP_COMMA
3073 /* The curly brace at the end of an enum-specifier. */
3074 && next_token->type != CPP_CLOSE_BRACE
3075 /* The end of a statement. */
3076 && next_token->type != CPP_SEMICOLON
3077 /* The end of the cast-expression. */
3078 && next_token->type != CPP_CLOSE_PAREN
3079 /* The end of an array bound. */
3080 && next_token->type != CPP_CLOSE_SQUARE
3081 /* The closing ">" in a template-argument-list. */
3082 && (next_token->type != CPP_GREATER
3083 || parser->greater_than_is_operator_p)
3084 /* C++0x only: A ">>" treated like two ">" tokens,
3085 in a template-argument-list. */
3086 && (next_token->type != CPP_RSHIFT
3088 || parser->greater_than_is_operator_p))
3092 /* If we are within a cast, then the constraint that the
3093 cast is to an integral or enumeration type will be
3094 checked at that point. If we are not within a cast, then
3095 this code is invalid. */
3097 cp_parser_non_integral_constant_expression
3098 (parser, "floating-point literal");
3100 return token->u.value;
3104 /* ??? Should wide strings be allowed when parser->translate_strings_p
3105 is false (i.e. in attributes)? If not, we can kill the third
3106 argument to cp_parser_string_literal. */
3107 return cp_parser_string_literal (parser,
3108 parser->translate_strings_p,
3111 case CPP_OPEN_PAREN:
3114 bool saved_greater_than_is_operator_p;
3116 /* Consume the `('. */
3117 cp_lexer_consume_token (parser->lexer);
3118 /* Within a parenthesized expression, a `>' token is always
3119 the greater-than operator. */
3120 saved_greater_than_is_operator_p
3121 = parser->greater_than_is_operator_p;
3122 parser->greater_than_is_operator_p = true;
3123 /* If we see `( { ' then we are looking at the beginning of
3124 a GNU statement-expression. */
3125 if (cp_parser_allow_gnu_extensions_p (parser)
3126 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
3128 /* Statement-expressions are not allowed by the standard. */
3130 pedwarn ("ISO C++ forbids braced-groups within expressions");
3132 /* And they're not allowed outside of a function-body; you
3133 cannot, for example, write:
3135 int i = ({ int j = 3; j + 1; });
3137 at class or namespace scope. */
3138 if (!parser->in_function_body)
3140 error ("statement-expressions are allowed only inside functions");
3141 cp_parser_skip_to_end_of_block_or_statement (parser);
3142 expr = error_mark_node;
3146 /* Start the statement-expression. */
3147 expr = begin_stmt_expr ();
3148 /* Parse the compound-statement. */
3149 cp_parser_compound_statement (parser, expr, false);
3151 expr = finish_stmt_expr (expr, false);
3156 /* Parse the parenthesized expression. */
3157 expr = cp_parser_expression (parser, cast_p);
3158 /* Let the front end know that this expression was
3159 enclosed in parentheses. This matters in case, for
3160 example, the expression is of the form `A::B', since
3161 `&A::B' might be a pointer-to-member, but `&(A::B)' is
3163 finish_parenthesized_expr (expr);
3165 /* The `>' token might be the end of a template-id or
3166 template-parameter-list now. */
3167 parser->greater_than_is_operator_p
3168 = saved_greater_than_is_operator_p;
3169 /* Consume the `)'. */
3170 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
3171 cp_parser_skip_to_end_of_statement (parser);
3177 switch (token->keyword)
3179 /* These two are the boolean literals. */
3181 cp_lexer_consume_token (parser->lexer);
3182 return boolean_true_node;
3184 cp_lexer_consume_token (parser->lexer);
3185 return boolean_false_node;
3187 /* The `__null' literal. */
3189 cp_lexer_consume_token (parser->lexer);
3192 /* Recognize the `this' keyword. */
3194 cp_lexer_consume_token (parser->lexer);
3195 if (parser->local_variables_forbidden_p)
3197 error ("%<this%> may not be used in this context");
3198 return error_mark_node;
3200 /* Pointers cannot appear in constant-expressions. */
3201 if (cp_parser_non_integral_constant_expression (parser,
3203 return error_mark_node;
3204 return finish_this_expr ();
3206 /* The `operator' keyword can be the beginning of an
3211 case RID_FUNCTION_NAME:
3212 case RID_PRETTY_FUNCTION_NAME:
3213 case RID_C99_FUNCTION_NAME:
3214 /* The symbols __FUNCTION__, __PRETTY_FUNCTION__, and
3215 __func__ are the names of variables -- but they are
3216 treated specially. Therefore, they are handled here,
3217 rather than relying on the generic id-expression logic
3218 below. Grammatically, these names are id-expressions.
3220 Consume the token. */
3221 token = cp_lexer_consume_token (parser->lexer);
3222 /* Look up the name. */
3223 return finish_fname (token->u.value);
3230 /* The `__builtin_va_arg' construct is used to handle
3231 `va_arg'. Consume the `__builtin_va_arg' token. */
3232 cp_lexer_consume_token (parser->lexer);
3233 /* Look for the opening `('. */
3234 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
3235 /* Now, parse the assignment-expression. */
3236 expression = cp_parser_assignment_expression (parser,
3238 /* Look for the `,'. */
3239 cp_parser_require (parser, CPP_COMMA, "`,'");
3240 /* Parse the type-id. */
3241 type = cp_parser_type_id (parser);
3242 /* Look for the closing `)'. */
3243 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
3244 /* Using `va_arg' in a constant-expression is not
3246 if (cp_parser_non_integral_constant_expression (parser,
3248 return error_mark_node;
3249 return build_x_va_arg (expression, type);
3253 return cp_parser_builtin_offsetof (parser);
3255 case RID_HAS_NOTHROW_ASSIGN:
3256 case RID_HAS_NOTHROW_CONSTRUCTOR:
3257 case RID_HAS_NOTHROW_COPY:
3258 case RID_HAS_TRIVIAL_ASSIGN:
3259 case RID_HAS_TRIVIAL_CONSTRUCTOR:
3260 case RID_HAS_TRIVIAL_COPY:
3261 case RID_HAS_TRIVIAL_DESTRUCTOR:
3262 case RID_HAS_VIRTUAL_DESTRUCTOR:
3263 case RID_IS_ABSTRACT:
3264 case RID_IS_BASE_OF:
3266 case RID_IS_CONVERTIBLE_TO:
3270 case RID_IS_POLYMORPHIC:
3272 return cp_parser_trait_expr (parser, token->keyword);
3274 /* Objective-C++ expressions. */
3276 case RID_AT_PROTOCOL:
3277 case RID_AT_SELECTOR:
3278 return cp_parser_objc_expression (parser);
3281 cp_parser_error (parser, "expected primary-expression");
3282 return error_mark_node;
3285 /* An id-expression can start with either an identifier, a
3286 `::' as the beginning of a qualified-id, or the "operator"
3290 case CPP_TEMPLATE_ID:
3291 case CPP_NESTED_NAME_SPECIFIER:
3295 const char *error_msg;
3300 /* Parse the id-expression. */
3302 = cp_parser_id_expression (parser,
3303 /*template_keyword_p=*/false,
3304 /*check_dependency_p=*/true,
3306 /*declarator_p=*/false,
3307 /*optional_p=*/false);
3308 if (id_expression == error_mark_node)
3309 return error_mark_node;
3310 token = cp_lexer_peek_token (parser->lexer);
3311 done = (token->type != CPP_OPEN_SQUARE
3312 && token->type != CPP_OPEN_PAREN
3313 && token->type != CPP_DOT
3314 && token->type != CPP_DEREF
3315 && token->type != CPP_PLUS_PLUS
3316 && token->type != CPP_MINUS_MINUS);
3317 /* If we have a template-id, then no further lookup is
3318 required. If the template-id was for a template-class, we
3319 will sometimes have a TYPE_DECL at this point. */
3320 if (TREE_CODE (id_expression) == TEMPLATE_ID_EXPR
3321 || TREE_CODE (id_expression) == TYPE_DECL)
3322 decl = id_expression;
3323 /* Look up the name. */
3326 tree ambiguous_decls;
3328 decl = cp_parser_lookup_name (parser, id_expression,
3331 /*is_namespace=*/false,
3332 /*check_dependency=*/true,
3334 /* If the lookup was ambiguous, an error will already have
3336 if (ambiguous_decls)
3337 return error_mark_node;
3339 /* In Objective-C++, an instance variable (ivar) may be preferred
3340 to whatever cp_parser_lookup_name() found. */
3341 decl = objc_lookup_ivar (decl, id_expression);
3343 /* If name lookup gives us a SCOPE_REF, then the
3344 qualifying scope was dependent. */
3345 if (TREE_CODE (decl) == SCOPE_REF)
3347 /* Check to see if DECL is a local variable in a context
3348 where that is forbidden. */
3349 if (parser->local_variables_forbidden_p
3350 && local_variable_p (decl))
3352 /* It might be that we only found DECL because we are
3353 trying to be generous with pre-ISO scoping rules.
3354 For example, consider:
3358 for (int i = 0; i < 10; ++i) {}
3359 extern void f(int j = i);
3362 Here, name look up will originally find the out
3363 of scope `i'. We need to issue a warning message,
3364 but then use the global `i'. */
3365 decl = check_for_out_of_scope_variable (decl);
3366 if (local_variable_p (decl))
3368 error ("local variable %qD may not appear in this context",
3370 return error_mark_node;
3375 decl = (finish_id_expression
3376 (id_expression, decl, parser->scope,
3378 parser->integral_constant_expression_p,
3379 parser->allow_non_integral_constant_expression_p,
3380 &parser->non_integral_constant_expression_p,
3381 template_p, done, address_p,
3385 cp_parser_error (parser, error_msg);
3389 /* Anything else is an error. */
3391 /* ...unless we have an Objective-C++ message or string literal,
3393 if (c_dialect_objc ()
3394 && (token->type == CPP_OPEN_SQUARE
3395 || token->type == CPP_OBJC_STRING))
3396 return cp_parser_objc_expression (parser);
3398 cp_parser_error (parser, "expected primary-expression");
3399 return error_mark_node;
3403 /* Parse an id-expression.
3410 :: [opt] nested-name-specifier template [opt] unqualified-id
3412 :: operator-function-id
3415 Return a representation of the unqualified portion of the
3416 identifier. Sets PARSER->SCOPE to the qualifying scope if there is
3417 a `::' or nested-name-specifier.
3419 Often, if the id-expression was a qualified-id, the caller will
3420 want to make a SCOPE_REF to represent the qualified-id. This
3421 function does not do this in order to avoid wastefully creating
3422 SCOPE_REFs when they are not required.
3424 If TEMPLATE_KEYWORD_P is true, then we have just seen the
3427 If CHECK_DEPENDENCY_P is false, then names are looked up inside
3428 uninstantiated templates.
3430 If *TEMPLATE_P is non-NULL, it is set to true iff the
3431 `template' keyword is used to explicitly indicate that the entity
3432 named is a template.
3434 If DECLARATOR_P is true, the id-expression is appearing as part of
3435 a declarator, rather than as part of an expression. */
3438 cp_parser_id_expression (cp_parser *parser,
3439 bool template_keyword_p,
3440 bool check_dependency_p,
3445 bool global_scope_p;
3446 bool nested_name_specifier_p;
3448 /* Assume the `template' keyword was not used. */
3450 *template_p = template_keyword_p;
3452 /* Look for the optional `::' operator. */
3454 = (cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false)
3456 /* Look for the optional nested-name-specifier. */
3457 nested_name_specifier_p
3458 = (cp_parser_nested_name_specifier_opt (parser,
3459 /*typename_keyword_p=*/false,
3464 /* If there is a nested-name-specifier, then we are looking at
3465 the first qualified-id production. */
3466 if (nested_name_specifier_p)
3469 tree saved_object_scope;
3470 tree saved_qualifying_scope;
3471 tree unqualified_id;
3474 /* See if the next token is the `template' keyword. */
3476 template_p = &is_template;
3477 *template_p = cp_parser_optional_template_keyword (parser);
3478 /* Name lookup we do during the processing of the
3479 unqualified-id might obliterate SCOPE. */
3480 saved_scope = parser->scope;
3481 saved_object_scope = parser->object_scope;
3482 saved_qualifying_scope = parser->qualifying_scope;
3483 /* Process the final unqualified-id. */
3484 unqualified_id = cp_parser_unqualified_id (parser, *template_p,
3487 /*optional_p=*/false);
3488 /* Restore the SAVED_SCOPE for our caller. */
3489 parser->scope = saved_scope;
3490 parser->object_scope = saved_object_scope;
3491 parser->qualifying_scope = saved_qualifying_scope;
3493 return unqualified_id;
3495 /* Otherwise, if we are in global scope, then we are looking at one
3496 of the other qualified-id productions. */
3497 else if (global_scope_p)
3502 /* Peek at the next token. */
3503 token = cp_lexer_peek_token (parser->lexer);
3505 /* If it's an identifier, and the next token is not a "<", then
3506 we can avoid the template-id case. This is an optimization
3507 for this common case. */
3508 if (token->type == CPP_NAME
3509 && !cp_parser_nth_token_starts_template_argument_list_p
3511 return cp_parser_identifier (parser);
3513 cp_parser_parse_tentatively (parser);
3514 /* Try a template-id. */
3515 id = cp_parser_template_id (parser,
3516 /*template_keyword_p=*/false,
3517 /*check_dependency_p=*/true,
3519 /* If that worked, we're done. */
3520 if (cp_parser_parse_definitely (parser))
3523 /* Peek at the next token. (Changes in the token buffer may
3524 have invalidated the pointer obtained above.) */
3525 token = cp_lexer_peek_token (parser->lexer);
3527 switch (token->type)
3530 return cp_parser_identifier (parser);
3533 if (token->keyword == RID_OPERATOR)
3534 return cp_parser_operator_function_id (parser);
3538 cp_parser_error (parser, "expected id-expression");
3539 return error_mark_node;
3543 return cp_parser_unqualified_id (parser, template_keyword_p,
3544 /*check_dependency_p=*/true,
3549 /* Parse an unqualified-id.
3553 operator-function-id
3554 conversion-function-id
3558 If TEMPLATE_KEYWORD_P is TRUE, we have just seen the `template'
3559 keyword, in a construct like `A::template ...'.
3561 Returns a representation of unqualified-id. For the `identifier'
3562 production, an IDENTIFIER_NODE is returned. For the `~ class-name'
3563 production a BIT_NOT_EXPR is returned; the operand of the
3564 BIT_NOT_EXPR is an IDENTIFIER_NODE for the class-name. For the
3565 other productions, see the documentation accompanying the
3566 corresponding parsing functions. If CHECK_DEPENDENCY_P is false,
3567 names are looked up in uninstantiated templates. If DECLARATOR_P
3568 is true, the unqualified-id is appearing as part of a declarator,
3569 rather than as part of an expression. */
3572 cp_parser_unqualified_id (cp_parser* parser,
3573 bool template_keyword_p,
3574 bool check_dependency_p,
3580 /* Peek at the next token. */
3581 token = cp_lexer_peek_token (parser->lexer);
3583 switch (token->type)
3589 /* We don't know yet whether or not this will be a
3591 cp_parser_parse_tentatively (parser);
3592 /* Try a template-id. */
3593 id = cp_parser_template_id (parser, template_keyword_p,
3596 /* If it worked, we're done. */
3597 if (cp_parser_parse_definitely (parser))
3599 /* Otherwise, it's an ordinary identifier. */
3600 return cp_parser_identifier (parser);
3603 case CPP_TEMPLATE_ID:
3604 return cp_parser_template_id (parser, template_keyword_p,
3611 tree qualifying_scope;
3616 /* Consume the `~' token. */
3617 cp_lexer_consume_token (parser->lexer);
3618 /* Parse the class-name. The standard, as written, seems to
3621 template <typename T> struct S { ~S (); };
3622 template <typename T> S<T>::~S() {}
3624 is invalid, since `~' must be followed by a class-name, but
3625 `S<T>' is dependent, and so not known to be a class.
3626 That's not right; we need to look in uninstantiated
3627 templates. A further complication arises from:
3629 template <typename T> void f(T t) {
3633 Here, it is not possible to look up `T' in the scope of `T'
3634 itself. We must look in both the current scope, and the
3635 scope of the containing complete expression.
3637 Yet another issue is:
3646 The standard does not seem to say that the `S' in `~S'
3647 should refer to the type `S' and not the data member
3650 /* DR 244 says that we look up the name after the "~" in the
3651 same scope as we looked up the qualifying name. That idea
3652 isn't fully worked out; it's more complicated than that. */
3653 scope = parser->scope;
3654 object_scope = parser->object_scope;
3655 qualifying_scope = parser->qualifying_scope;
3657 /* Check for invalid scopes. */
3658 if (scope == error_mark_node)
3660 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
3661 cp_lexer_consume_token (parser->lexer);
3662 return error_mark_node;
3664 if (scope && TREE_CODE (scope) == NAMESPACE_DECL)
3666 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
3667 error ("scope %qT before %<~%> is not a class-name", scope);
3668 cp_parser_simulate_error (parser);
3669 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
3670 cp_lexer_consume_token (parser->lexer);
3671 return error_mark_node;
3673 gcc_assert (!scope || TYPE_P (scope));
3675 /* If the name is of the form "X::~X" it's OK. */
3676 token = cp_lexer_peek_token (parser->lexer);
3678 && token->type == CPP_NAME
3679 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
3681 && constructor_name_p (token->u.value, scope))
3683 cp_lexer_consume_token (parser->lexer);
3684 return build_nt (BIT_NOT_EXPR, scope);
3687 /* If there was an explicit qualification (S::~T), first look
3688 in the scope given by the qualification (i.e., S). */
3690 type_decl = NULL_TREE;
3693 cp_parser_parse_tentatively (parser);
3694 type_decl = cp_parser_class_name (parser,
3695 /*typename_keyword_p=*/false,
3696 /*template_keyword_p=*/false,
3698 /*check_dependency=*/false,
3699 /*class_head_p=*/false,
3701 if (cp_parser_parse_definitely (parser))
3704 /* In "N::S::~S", look in "N" as well. */
3705 if (!done && scope && qualifying_scope)
3707 cp_parser_parse_tentatively (parser);
3708 parser->scope = qualifying_scope;
3709 parser->object_scope = NULL_TREE;
3710 parser->qualifying_scope = NULL_TREE;
3712 = cp_parser_class_name (parser,
3713 /*typename_keyword_p=*/false,
3714 /*template_keyword_p=*/false,
3716 /*check_dependency=*/false,
3717 /*class_head_p=*/false,
3719 if (cp_parser_parse_definitely (parser))
3722 /* In "p->S::~T", look in the scope given by "*p" as well. */
3723 else if (!done && object_scope)
3725 cp_parser_parse_tentatively (parser);
3726 parser->scope = object_scope;
3727 parser->object_scope = NULL_TREE;
3728 parser->qualifying_scope = NULL_TREE;
3730 = cp_parser_class_name (parser,
3731 /*typename_keyword_p=*/false,
3732 /*template_keyword_p=*/false,
3734 /*check_dependency=*/false,
3735 /*class_head_p=*/false,
3737 if (cp_parser_parse_definitely (parser))
3740 /* Look in the surrounding context. */
3743 parser->scope = NULL_TREE;
3744 parser->object_scope = NULL_TREE;
3745 parser->qualifying_scope = NULL_TREE;
3747 = cp_parser_class_name (parser,
3748 /*typename_keyword_p=*/false,
3749 /*template_keyword_p=*/false,
3751 /*check_dependency=*/false,
3752 /*class_head_p=*/false,
3755 /* If an error occurred, assume that the name of the
3756 destructor is the same as the name of the qualifying
3757 class. That allows us to keep parsing after running
3758 into ill-formed destructor names. */
3759 if (type_decl == error_mark_node && scope)
3760 return build_nt (BIT_NOT_EXPR, scope);
3761 else if (type_decl == error_mark_node)
3762 return error_mark_node;
3764 /* Check that destructor name and scope match. */
3765 if (declarator_p && scope && !check_dtor_name (scope, type_decl))
3767 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
3768 error ("declaration of %<~%T%> as member of %qT",
3770 cp_parser_simulate_error (parser);
3771 return error_mark_node;
3776 A typedef-name that names a class shall not be used as the
3777 identifier in the declarator for a destructor declaration. */
3779 && !DECL_IMPLICIT_TYPEDEF_P (type_decl)
3780 && !DECL_SELF_REFERENCE_P (type_decl)
3781 && !cp_parser_uncommitted_to_tentative_parse_p (parser))
3782 error ("typedef-name %qD used as destructor declarator",
3785 return build_nt (BIT_NOT_EXPR, TREE_TYPE (type_decl));
3789 if (token->keyword == RID_OPERATOR)
3793 /* This could be a template-id, so we try that first. */
3794 cp_parser_parse_tentatively (parser);
3795 /* Try a template-id. */
3796 id = cp_parser_template_id (parser, template_keyword_p,
3797 /*check_dependency_p=*/true,
3799 /* If that worked, we're done. */
3800 if (cp_parser_parse_definitely (parser))
3802 /* We still don't know whether we're looking at an
3803 operator-function-id or a conversion-function-id. */
3804 cp_parser_parse_tentatively (parser);
3805 /* Try an operator-function-id. */
3806 id = cp_parser_operator_function_id (parser);
3807 /* If that didn't work, try a conversion-function-id. */
3808 if (!cp_parser_parse_definitely (parser))
3809 id = cp_parser_conversion_function_id (parser);
3818 cp_parser_error (parser, "expected unqualified-id");
3819 return error_mark_node;
3823 /* Parse an (optional) nested-name-specifier.
3825 nested-name-specifier:
3826 class-or-namespace-name :: nested-name-specifier [opt]
3827 class-or-namespace-name :: template nested-name-specifier [opt]
3829 PARSER->SCOPE should be set appropriately before this function is
3830 called. TYPENAME_KEYWORD_P is TRUE if the `typename' keyword is in
3831 effect. TYPE_P is TRUE if we non-type bindings should be ignored
3834 Sets PARSER->SCOPE to the class (TYPE) or namespace
3835 (NAMESPACE_DECL) specified by the nested-name-specifier, or leaves
3836 it unchanged if there is no nested-name-specifier. Returns the new
3837 scope iff there is a nested-name-specifier, or NULL_TREE otherwise.
3839 If IS_DECLARATION is TRUE, the nested-name-specifier is known to be
3840 part of a declaration and/or decl-specifier. */
3843 cp_parser_nested_name_specifier_opt (cp_parser *parser,
3844 bool typename_keyword_p,
3845 bool check_dependency_p,
3847 bool is_declaration)
3849 bool success = false;
3850 cp_token_position start = 0;
3853 /* Remember where the nested-name-specifier starts. */
3854 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
3856 start = cp_lexer_token_position (parser->lexer, false);
3857 push_deferring_access_checks (dk_deferred);
3864 tree saved_qualifying_scope;
3865 bool template_keyword_p;
3867 /* Spot cases that cannot be the beginning of a
3868 nested-name-specifier. */
3869 token = cp_lexer_peek_token (parser->lexer);
3871 /* If the next token is CPP_NESTED_NAME_SPECIFIER, just process
3872 the already parsed nested-name-specifier. */
3873 if (token->type == CPP_NESTED_NAME_SPECIFIER)
3875 /* Grab the nested-name-specifier and continue the loop. */
3876 cp_parser_pre_parsed_nested_name_specifier (parser);
3877 /* If we originally encountered this nested-name-specifier
3878 with IS_DECLARATION set to false, we will not have
3879 resolved TYPENAME_TYPEs, so we must do so here. */
3881 && TREE_CODE (parser->scope) == TYPENAME_TYPE)
3883 new_scope = resolve_typename_type (parser->scope,
3884 /*only_current_p=*/false);
3885 if (new_scope != error_mark_node)
3886 parser->scope = new_scope;
3892 /* Spot cases that cannot be the beginning of a
3893 nested-name-specifier. On the second and subsequent times
3894 through the loop, we look for the `template' keyword. */
3895 if (success && token->keyword == RID_TEMPLATE)
3897 /* A template-id can start a nested-name-specifier. */
3898 else if (token->type == CPP_TEMPLATE_ID)
3902 /* If the next token is not an identifier, then it is
3903 definitely not a class-or-namespace-name. */
3904 if (token->type != CPP_NAME)
3906 /* If the following token is neither a `<' (to begin a
3907 template-id), nor a `::', then we are not looking at a
3908 nested-name-specifier. */
3909 token = cp_lexer_peek_nth_token (parser->lexer, 2);
3910 if (token->type != CPP_SCOPE
3911 && !cp_parser_nth_token_starts_template_argument_list_p
3916 /* The nested-name-specifier is optional, so we parse
3918 cp_parser_parse_tentatively (parser);
3920 /* Look for the optional `template' keyword, if this isn't the
3921 first time through the loop. */
3923 template_keyword_p = cp_parser_optional_template_keyword (parser);
3925 template_keyword_p = false;
3927 /* Save the old scope since the name lookup we are about to do
3928 might destroy it. */
3929 old_scope = parser->scope;
3930 saved_qualifying_scope = parser->qualifying_scope;
3931 /* In a declarator-id like "X<T>::I::Y<T>" we must be able to
3932 look up names in "X<T>::I" in order to determine that "Y" is
3933 a template. So, if we have a typename at this point, we make
3934 an effort to look through it. */
3936 && !typename_keyword_p
3938 && TREE_CODE (parser->scope) == TYPENAME_TYPE)
3939 parser->scope = resolve_typename_type (parser->scope,
3940 /*only_current_p=*/false);
3941 /* Parse the qualifying entity. */
3943 = cp_parser_class_or_namespace_name (parser,
3949 /* Look for the `::' token. */
3950 cp_parser_require (parser, CPP_SCOPE, "`::'");
3952 /* If we found what we wanted, we keep going; otherwise, we're
3954 if (!cp_parser_parse_definitely (parser))
3956 bool error_p = false;
3958 /* Restore the OLD_SCOPE since it was valid before the
3959 failed attempt at finding the last
3960 class-or-namespace-name. */
3961 parser->scope = old_scope;
3962 parser->qualifying_scope = saved_qualifying_scope;
3963 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
3965 /* If the next token is an identifier, and the one after
3966 that is a `::', then any valid interpretation would have
3967 found a class-or-namespace-name. */
3968 while (cp_lexer_next_token_is (parser->lexer, CPP_NAME)
3969 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
3971 && (cp_lexer_peek_nth_token (parser->lexer, 3)->type
3974 token = cp_lexer_consume_token (parser->lexer);
3977 if (!token->ambiguous_p)
3980 tree ambiguous_decls;
3982 decl = cp_parser_lookup_name (parser, token->u.value,
3984 /*is_template=*/false,
3985 /*is_namespace=*/false,
3986 /*check_dependency=*/true,
3988 if (TREE_CODE (decl) == TEMPLATE_DECL)
3989 error ("%qD used without template parameters", decl);
3990 else if (ambiguous_decls)
3992 error ("reference to %qD is ambiguous",
3994 print_candidates (ambiguous_decls);
3995 decl = error_mark_node;
3998 cp_parser_name_lookup_error
3999 (parser, token->u.value, decl,
4000 "is not a class or namespace");
4002 parser->scope = error_mark_node;
4004 /* Treat this as a successful nested-name-specifier
4009 If the name found is not a class-name (clause
4010 _class_) or namespace-name (_namespace.def_), the
4011 program is ill-formed. */
4014 cp_lexer_consume_token (parser->lexer);
4018 /* We've found one valid nested-name-specifier. */
4020 /* Name lookup always gives us a DECL. */
4021 if (TREE_CODE (new_scope) == TYPE_DECL)
4022 new_scope = TREE_TYPE (new_scope);
4023 /* Uses of "template" must be followed by actual templates. */
4024 if (template_keyword_p
4025 && !(CLASS_TYPE_P (new_scope)
4026 && ((CLASSTYPE_USE_TEMPLATE (new_scope)
4027 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (new_scope)))
4028 || CLASSTYPE_IS_TEMPLATE (new_scope)))
4029 && !(TREE_CODE (new_scope) == TYPENAME_TYPE
4030 && (TREE_CODE (TYPENAME_TYPE_FULLNAME (new_scope))
4031 == TEMPLATE_ID_EXPR)))
4032 pedwarn (TYPE_P (new_scope)
4033 ? "%qT is not a template"
4034 : "%qD is not a template",
4036 /* If it is a class scope, try to complete it; we are about to
4037 be looking up names inside the class. */
4038 if (TYPE_P (new_scope)
4039 /* Since checking types for dependency can be expensive,
4040 avoid doing it if the type is already complete. */
4041 && !COMPLETE_TYPE_P (new_scope)
4042 /* Do not try to complete dependent types. */
4043 && !dependent_type_p (new_scope))
4044 new_scope = complete_type (new_scope);
4045 /* Make sure we look in the right scope the next time through
4047 parser->scope = new_scope;
4050 /* If parsing tentatively, replace the sequence of tokens that makes
4051 up the nested-name-specifier with a CPP_NESTED_NAME_SPECIFIER
4052 token. That way, should we re-parse the token stream, we will
4053 not have to repeat the effort required to do the parse, nor will
4054 we issue duplicate error messages. */
4055 if (success && start)
4059 token = cp_lexer_token_at (parser->lexer, start);
4060 /* Reset the contents of the START token. */
4061 token->type = CPP_NESTED_NAME_SPECIFIER;
4062 /* Retrieve any deferred checks. Do not pop this access checks yet
4063 so the memory will not be reclaimed during token replacing below. */
4064 token->u.tree_check_value = GGC_CNEW (struct tree_check);
4065 token->u.tree_check_value->value = parser->scope;
4066 token->u.tree_check_value->checks = get_deferred_access_checks ();
4067 token->u.tree_check_value->qualifying_scope =
4068 parser->qualifying_scope;
4069 token->keyword = RID_MAX;
4071 /* Purge all subsequent tokens. */
4072 cp_lexer_purge_tokens_after (parser->lexer, start);
4076 pop_to_parent_deferring_access_checks ();
4078 return success ? parser->scope : NULL_TREE;
4081 /* Parse a nested-name-specifier. See
4082 cp_parser_nested_name_specifier_opt for details. This function
4083 behaves identically, except that it will an issue an error if no
4084 nested-name-specifier is present. */
4087 cp_parser_nested_name_specifier (cp_parser *parser,
4088 bool typename_keyword_p,
4089 bool check_dependency_p,
4091 bool is_declaration)
4095 /* Look for the nested-name-specifier. */
4096 scope = cp_parser_nested_name_specifier_opt (parser,
4101 /* If it was not present, issue an error message. */
4104 cp_parser_error (parser, "expected nested-name-specifier");
4105 parser->scope = NULL_TREE;
4111 /* Parse a class-or-namespace-name.
4113 class-or-namespace-name:
4117 TYPENAME_KEYWORD_P is TRUE iff the `typename' keyword is in effect.
4118 TEMPLATE_KEYWORD_P is TRUE iff the `template' keyword is in effect.
4119 CHECK_DEPENDENCY_P is FALSE iff dependent names should be looked up.
4120 TYPE_P is TRUE iff the next name should be taken as a class-name,
4121 even the same name is declared to be another entity in the same
4124 Returns the class (TYPE_DECL) or namespace (NAMESPACE_DECL)
4125 specified by the class-or-namespace-name. If neither is found the
4126 ERROR_MARK_NODE is returned. */
4129 cp_parser_class_or_namespace_name (cp_parser *parser,
4130 bool typename_keyword_p,
4131 bool template_keyword_p,
4132 bool check_dependency_p,
4134 bool is_declaration)
4137 tree saved_qualifying_scope;
4138 tree saved_object_scope;
4142 /* Before we try to parse the class-name, we must save away the
4143 current PARSER->SCOPE since cp_parser_class_name will destroy
4145 saved_scope = parser->scope;
4146 saved_qualifying_scope = parser->qualifying_scope;
4147 saved_object_scope = parser->object_scope;
4148 /* Try for a class-name first. If the SAVED_SCOPE is a type, then
4149 there is no need to look for a namespace-name. */
4150 only_class_p = template_keyword_p || (saved_scope && TYPE_P (saved_scope));
4152 cp_parser_parse_tentatively (parser);
4153 scope = cp_parser_class_name (parser,
4156 type_p ? class_type : none_type,
4158 /*class_head_p=*/false,
4160 /* If that didn't work, try for a namespace-name. */
4161 if (!only_class_p && !cp_parser_parse_definitely (parser))
4163 /* Restore the saved scope. */
4164 parser->scope = saved_scope;
4165 parser->qualifying_scope = saved_qualifying_scope;
4166 parser->object_scope = saved_object_scope;
4167 /* If we are not looking at an identifier followed by the scope
4168 resolution operator, then this is not part of a
4169 nested-name-specifier. (Note that this function is only used
4170 to parse the components of a nested-name-specifier.) */
4171 if (cp_lexer_next_token_is_not (parser->lexer, CPP_NAME)
4172 || cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_SCOPE)
4173 return error_mark_node;
4174 scope = cp_parser_namespace_name (parser);
4180 /* Parse a postfix-expression.
4184 postfix-expression [ expression ]
4185 postfix-expression ( expression-list [opt] )
4186 simple-type-specifier ( expression-list [opt] )
4187 typename :: [opt] nested-name-specifier identifier
4188 ( expression-list [opt] )
4189 typename :: [opt] nested-name-specifier template [opt] template-id
4190 ( expression-list [opt] )
4191 postfix-expression . template [opt] id-expression
4192 postfix-expression -> template [opt] id-expression
4193 postfix-expression . pseudo-destructor-name
4194 postfix-expression -> pseudo-destructor-name
4195 postfix-expression ++
4196 postfix-expression --
4197 dynamic_cast < type-id > ( expression )
4198 static_cast < type-id > ( expression )
4199 reinterpret_cast < type-id > ( expression )
4200 const_cast < type-id > ( expression )
4201 typeid ( expression )
4207 ( type-id ) { initializer-list , [opt] }
4209 This extension is a GNU version of the C99 compound-literal
4210 construct. (The C99 grammar uses `type-name' instead of `type-id',
4211 but they are essentially the same concept.)
4213 If ADDRESS_P is true, the postfix expression is the operand of the
4214 `&' operator. CAST_P is true if this expression is the target of a
4217 Returns a representation of the expression. */
4220 cp_parser_postfix_expression (cp_parser *parser, bool address_p, bool cast_p)
4224 cp_id_kind idk = CP_ID_KIND_NONE;
4225 tree postfix_expression = NULL_TREE;
4227 /* Peek at the next token. */
4228 token = cp_lexer_peek_token (parser->lexer);
4229 /* Some of the productions are determined by keywords. */
4230 keyword = token->keyword;
4240 const char *saved_message;
4242 /* All of these can be handled in the same way from the point
4243 of view of parsing. Begin by consuming the token
4244 identifying the cast. */
4245 cp_lexer_consume_token (parser->lexer);
4247 /* New types cannot be defined in the cast. */
4248 saved_message = parser->type_definition_forbidden_message;
4249 parser->type_definition_forbidden_message
4250 = "types may not be defined in casts";
4252 /* Look for the opening `<'. */
4253 cp_parser_require (parser, CPP_LESS, "`<'");
4254 /* Parse the type to which we are casting. */
4255 type = cp_parser_type_id (parser);
4256 /* Look for the closing `>'. */
4257 cp_parser_require (parser, CPP_GREATER, "`>'");
4258 /* Restore the old message. */
4259 parser->type_definition_forbidden_message = saved_message;
4261 /* And the expression which is being cast. */
4262 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
4263 expression = cp_parser_expression (parser, /*cast_p=*/true);
4264 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
4266 /* Only type conversions to integral or enumeration types
4267 can be used in constant-expressions. */
4268 if (!cast_valid_in_integral_constant_expression_p (type)
4269 && (cp_parser_non_integral_constant_expression
4271 "a cast to a type other than an integral or "
4272 "enumeration type")))
4273 return error_mark_node;
4279 = build_dynamic_cast (type, expression);
4283 = build_static_cast (type, expression);
4287 = build_reinterpret_cast (type, expression);
4291 = build_const_cast (type, expression);
4302 const char *saved_message;
4303 bool saved_in_type_id_in_expr_p;
4305 /* Consume the `typeid' token. */
4306 cp_lexer_consume_token (parser->lexer);
4307 /* Look for the `(' token. */
4308 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
4309 /* Types cannot be defined in a `typeid' expression. */
4310 saved_message = parser->type_definition_forbidden_message;
4311 parser->type_definition_forbidden_message
4312 = "types may not be defined in a `typeid\' expression";
4313 /* We can't be sure yet whether we're looking at a type-id or an
4315 cp_parser_parse_tentatively (parser);
4316 /* Try a type-id first. */
4317 saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
4318 parser->in_type_id_in_expr_p = true;
4319 type = cp_parser_type_id (parser);
4320 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
4321 /* Look for the `)' token. Otherwise, we can't be sure that
4322 we're not looking at an expression: consider `typeid (int
4323 (3))', for example. */
4324 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
4325 /* If all went well, simply lookup the type-id. */
4326 if (cp_parser_parse_definitely (parser))
4327 postfix_expression = get_typeid (type);
4328 /* Otherwise, fall back to the expression variant. */
4333 /* Look for an expression. */
4334 expression = cp_parser_expression (parser, /*cast_p=*/false);
4335 /* Compute its typeid. */
4336 postfix_expression = build_typeid (expression);
4337 /* Look for the `)' token. */
4338 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
4340 /* Restore the saved message. */
4341 parser->type_definition_forbidden_message = saved_message;
4342 /* `typeid' may not appear in an integral constant expression. */
4343 if (cp_parser_non_integral_constant_expression(parser,
4344 "`typeid' operator"))
4345 return error_mark_node;
4352 /* The syntax permitted here is the same permitted for an
4353 elaborated-type-specifier. */
4354 type = cp_parser_elaborated_type_specifier (parser,
4355 /*is_friend=*/false,
4356 /*is_declaration=*/false);
4357 postfix_expression = cp_parser_functional_cast (parser, type);
4365 /* If the next thing is a simple-type-specifier, we may be
4366 looking at a functional cast. We could also be looking at
4367 an id-expression. So, we try the functional cast, and if
4368 that doesn't work we fall back to the primary-expression. */
4369 cp_parser_parse_tentatively (parser);
4370 /* Look for the simple-type-specifier. */
4371 type = cp_parser_simple_type_specifier (parser,
4372 /*decl_specs=*/NULL,
4373 CP_PARSER_FLAGS_NONE);
4374 /* Parse the cast itself. */
4375 if (!cp_parser_error_occurred (parser))
4377 = cp_parser_functional_cast (parser, type);
4378 /* If that worked, we're done. */
4379 if (cp_parser_parse_definitely (parser))
4382 /* If the functional-cast didn't work out, try a
4383 compound-literal. */
4384 if (cp_parser_allow_gnu_extensions_p (parser)
4385 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
4387 VEC(constructor_elt,gc) *initializer_list = NULL;
4388 bool saved_in_type_id_in_expr_p;
4390 cp_parser_parse_tentatively (parser);
4391 /* Consume the `('. */
4392 cp_lexer_consume_token (parser->lexer);
4393 /* Parse the type. */
4394 saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
4395 parser->in_type_id_in_expr_p = true;
4396 type = cp_parser_type_id (parser);
4397 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
4398 /* Look for the `)'. */
4399 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
4400 /* Look for the `{'. */
4401 cp_parser_require (parser, CPP_OPEN_BRACE, "`{'");
4402 /* If things aren't going well, there's no need to
4404 if (!cp_parser_error_occurred (parser))
4406 bool non_constant_p;
4407 /* Parse the initializer-list. */
4409 = cp_parser_initializer_list (parser, &non_constant_p);
4410 /* Allow a trailing `,'. */
4411 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
4412 cp_lexer_consume_token (parser->lexer);
4413 /* Look for the final `}'. */
4414 cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'");
4416 /* If that worked, we're definitely looking at a
4417 compound-literal expression. */
4418 if (cp_parser_parse_definitely (parser))
4420 /* Warn the user that a compound literal is not
4421 allowed in standard C++. */
4423 pedwarn ("ISO C++ forbids compound-literals");
4424 /* For simplicity, we disallow compound literals in
4425 constant-expressions. We could
4426 allow compound literals of integer type, whose
4427 initializer was a constant, in constant
4428 expressions. Permitting that usage, as a further
4429 extension, would not change the meaning of any
4430 currently accepted programs. (Of course, as
4431 compound literals are not part of ISO C++, the
4432 standard has nothing to say.) */
4433 if (cp_parser_non_integral_constant_expression
4434 (parser, "non-constant compound literals"))
4436 postfix_expression = error_mark_node;
4439 /* Form the representation of the compound-literal. */
4441 = finish_compound_literal (type, initializer_list);
4446 /* It must be a primary-expression. */
4448 = cp_parser_primary_expression (parser, address_p, cast_p,
4449 /*template_arg_p=*/false,
4455 /* Keep looping until the postfix-expression is complete. */
4458 if (idk == CP_ID_KIND_UNQUALIFIED
4459 && TREE_CODE (postfix_expression) == IDENTIFIER_NODE
4460 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_PAREN))
4461 /* It is not a Koenig lookup function call. */
4463 = unqualified_name_lookup_error (postfix_expression);
4465 /* Peek at the next token. */
4466 token = cp_lexer_peek_token (parser->lexer);
4468 switch (token->type)
4470 case CPP_OPEN_SQUARE:
4472 = cp_parser_postfix_open_square_expression (parser,
4475 idk = CP_ID_KIND_NONE;
4478 case CPP_OPEN_PAREN:
4479 /* postfix-expression ( expression-list [opt] ) */
4482 bool is_builtin_constant_p;
4483 bool saved_integral_constant_expression_p = false;
4484 bool saved_non_integral_constant_expression_p = false;
4487 is_builtin_constant_p
4488 = DECL_IS_BUILTIN_CONSTANT_P (postfix_expression);
4489 if (is_builtin_constant_p)
4491 /* The whole point of __builtin_constant_p is to allow
4492 non-constant expressions to appear as arguments. */
4493 saved_integral_constant_expression_p
4494 = parser->integral_constant_expression_p;
4495 saved_non_integral_constant_expression_p
4496 = parser->non_integral_constant_expression_p;
4497 parser->integral_constant_expression_p = false;
4499 args = (cp_parser_parenthesized_expression_list
4500 (parser, /*is_attribute_list=*/false,
4501 /*cast_p=*/false, /*allow_expansion_p=*/true,
4502 /*non_constant_p=*/NULL));
4503 if (is_builtin_constant_p)
4505 parser->integral_constant_expression_p
4506 = saved_integral_constant_expression_p;
4507 parser->non_integral_constant_expression_p
4508 = saved_non_integral_constant_expression_p;
4511 if (args == error_mark_node)
4513 postfix_expression = error_mark_node;
4517 /* Function calls are not permitted in
4518 constant-expressions. */
4519 if (! builtin_valid_in_constant_expr_p (postfix_expression)
4520 && cp_parser_non_integral_constant_expression (parser,
4523 postfix_expression = error_mark_node;
4528 if (idk == CP_ID_KIND_UNQUALIFIED)
4530 if (TREE_CODE (postfix_expression) == IDENTIFIER_NODE)
4536 = perform_koenig_lookup (postfix_expression, args);
4540 = unqualified_fn_lookup_error (postfix_expression);
4542 /* We do not perform argument-dependent lookup if
4543 normal lookup finds a non-function, in accordance
4544 with the expected resolution of DR 218. */
4545 else if (args && is_overloaded_fn (postfix_expression))
4547 tree fn = get_first_fn (postfix_expression);
4549 if (TREE_CODE (fn) == TEMPLATE_ID_EXPR)
4550 fn = OVL_CURRENT (TREE_OPERAND (fn, 0));
4552 /* Only do argument dependent lookup if regular
4553 lookup does not find a set of member functions.
4554 [basic.lookup.koenig]/2a */
4555 if (!DECL_FUNCTION_MEMBER_P (fn))
4559 = perform_koenig_lookup (postfix_expression, args);
4564 if (TREE_CODE (postfix_expression) == COMPONENT_REF)
4566 tree instance = TREE_OPERAND (postfix_expression, 0);
4567 tree fn = TREE_OPERAND (postfix_expression, 1);
4569 if (processing_template_decl
4570 && (type_dependent_expression_p (instance)
4571 || (!BASELINK_P (fn)
4572 && TREE_CODE (fn) != FIELD_DECL)
4573 || type_dependent_expression_p (fn)
4574 || any_type_dependent_arguments_p (args)))
4577 = build_nt_call_list (postfix_expression, args);
4581 if (BASELINK_P (fn))
4583 = (build_new_method_call
4584 (instance, fn, args, NULL_TREE,
4585 (idk == CP_ID_KIND_QUALIFIED
4586 ? LOOKUP_NONVIRTUAL : LOOKUP_NORMAL),
4590 = finish_call_expr (postfix_expression, args,
4591 /*disallow_virtual=*/false,
4592 /*koenig_p=*/false);
4594 else if (TREE_CODE (postfix_expression) == OFFSET_REF
4595 || TREE_CODE (postfix_expression) == MEMBER_REF
4596 || TREE_CODE (postfix_expression) == DOTSTAR_EXPR)
4597 postfix_expression = (build_offset_ref_call_from_tree
4598 (postfix_expression, args));
4599 else if (idk == CP_ID_KIND_QUALIFIED)
4600 /* A call to a static class member, or a namespace-scope
4603 = finish_call_expr (postfix_expression, args,
4604 /*disallow_virtual=*/true,
4607 /* All other function calls. */
4609 = finish_call_expr (postfix_expression, args,
4610 /*disallow_virtual=*/false,
4613 /* The POSTFIX_EXPRESSION is certainly no longer an id. */
4614 idk = CP_ID_KIND_NONE;
4620 /* postfix-expression . template [opt] id-expression
4621 postfix-expression . pseudo-destructor-name
4622 postfix-expression -> template [opt] id-expression
4623 postfix-expression -> pseudo-destructor-name */
4625 /* Consume the `.' or `->' operator. */
4626 cp_lexer_consume_token (parser->lexer);
4629 = cp_parser_postfix_dot_deref_expression (parser, token->type,
4635 /* postfix-expression ++ */
4636 /* Consume the `++' token. */
4637 cp_lexer_consume_token (parser->lexer);
4638 /* Generate a representation for the complete expression. */
4640 = finish_increment_expr (postfix_expression,
4641 POSTINCREMENT_EXPR);
4642 /* Increments may not appear in constant-expressions. */
4643 if (cp_parser_non_integral_constant_expression (parser,
4645 postfix_expression = error_mark_node;
4646 idk = CP_ID_KIND_NONE;
4649 case CPP_MINUS_MINUS:
4650 /* postfix-expression -- */
4651 /* Consume the `--' token. */
4652 cp_lexer_consume_token (parser->lexer);
4653 /* Generate a representation for the complete expression. */
4655 = finish_increment_expr (postfix_expression,
4656 POSTDECREMENT_EXPR);
4657 /* Decrements may not appear in constant-expressions. */
4658 if (cp_parser_non_integral_constant_expression (parser,
4660 postfix_expression = error_mark_node;
4661 idk = CP_ID_KIND_NONE;
4665 return postfix_expression;
4669 /* We should never get here. */
4671 return error_mark_node;
4674 /* A subroutine of cp_parser_postfix_expression that also gets hijacked
4675 by cp_parser_builtin_offsetof. We're looking for
4677 postfix-expression [ expression ]
4679 FOR_OFFSETOF is set if we're being called in that context, which
4680 changes how we deal with integer constant expressions. */
4683 cp_parser_postfix_open_square_expression (cp_parser *parser,
4684 tree postfix_expression,
4689 /* Consume the `[' token. */
4690 cp_lexer_consume_token (parser->lexer);
4692 /* Parse the index expression. */
4693 /* ??? For offsetof, there is a question of what to allow here. If
4694 offsetof is not being used in an integral constant expression context,
4695 then we *could* get the right answer by computing the value at runtime.
4696 If we are in an integral constant expression context, then we might
4697 could accept any constant expression; hard to say without analysis.
4698 Rather than open the barn door too wide right away, allow only integer
4699 constant expressions here. */
4701 index = cp_parser_constant_expression (parser, false, NULL);
4703 index = cp_parser_expression (parser, /*cast_p=*/false);
4705 /* Look for the closing `]'. */
4706 cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'");
4708 /* Build the ARRAY_REF. */
4709 postfix_expression = grok_array_decl (postfix_expression, index);
4711 /* When not doing offsetof, array references are not permitted in
4712 constant-expressions. */
4714 && (cp_parser_non_integral_constant_expression
4715 (parser, "an array reference")))
4716 postfix_expression = error_mark_node;
4718 return postfix_expression;
4721 /* A subroutine of cp_parser_postfix_expression that also gets hijacked
4722 by cp_parser_builtin_offsetof. We're looking for
4724 postfix-expression . template [opt] id-expression
4725 postfix-expression . pseudo-destructor-name
4726 postfix-expression -> template [opt] id-expression
4727 postfix-expression -> pseudo-destructor-name
4729 FOR_OFFSETOF is set if we're being called in that context. That sorta
4730 limits what of the above we'll actually accept, but nevermind.
4731 TOKEN_TYPE is the "." or "->" token, which will already have been
4732 removed from the stream. */
4735 cp_parser_postfix_dot_deref_expression (cp_parser *parser,
4736 enum cpp_ttype token_type,
4737 tree postfix_expression,
4738 bool for_offsetof, cp_id_kind *idk)
4742 bool pseudo_destructor_p;
4743 tree scope = NULL_TREE;
4745 /* If this is a `->' operator, dereference the pointer. */
4746 if (token_type == CPP_DEREF)
4747 postfix_expression = build_x_arrow (postfix_expression);
4748 /* Check to see whether or not the expression is type-dependent. */
4749 dependent_p = type_dependent_expression_p (postfix_expression);
4750 /* The identifier following the `->' or `.' is not qualified. */
4751 parser->scope = NULL_TREE;
4752 parser->qualifying_scope = NULL_TREE;
4753 parser->object_scope = NULL_TREE;
4754 *idk = CP_ID_KIND_NONE;
4755 /* Enter the scope corresponding to the type of the object
4756 given by the POSTFIX_EXPRESSION. */
4757 if (!dependent_p && TREE_TYPE (postfix_expression) != NULL_TREE)
4759 scope = TREE_TYPE (postfix_expression);
4760 /* According to the standard, no expression should ever have
4761 reference type. Unfortunately, we do not currently match
4762 the standard in this respect in that our internal representation
4763 of an expression may have reference type even when the standard
4764 says it does not. Therefore, we have to manually obtain the
4765 underlying type here. */
4766 scope = non_reference (scope);
4767 /* The type of the POSTFIX_EXPRESSION must be complete. */
4768 if (scope == unknown_type_node)
4770 error ("%qE does not have class type", postfix_expression);
4774 scope = complete_type_or_else (scope, NULL_TREE);
4775 /* Let the name lookup machinery know that we are processing a
4776 class member access expression. */
4777 parser->context->object_type = scope;
4778 /* If something went wrong, we want to be able to discern that case,
4779 as opposed to the case where there was no SCOPE due to the type
4780 of expression being dependent. */
4782 scope = error_mark_node;
4783 /* If the SCOPE was erroneous, make the various semantic analysis
4784 functions exit quickly -- and without issuing additional error
4786 if (scope == error_mark_node)
4787 postfix_expression = error_mark_node;
4790 /* Assume this expression is not a pseudo-destructor access. */
4791 pseudo_destructor_p = false;
4793 /* If the SCOPE is a scalar type, then, if this is a valid program,
4794 we must be looking at a pseudo-destructor-name. */
4795 if (scope && SCALAR_TYPE_P (scope))
4800 cp_parser_parse_tentatively (parser);
4801 /* Parse the pseudo-destructor-name. */
4803 cp_parser_pseudo_destructor_name (parser, &s, &type);
4804 if (cp_parser_parse_definitely (parser))
4806 pseudo_destructor_p = true;
4808 = finish_pseudo_destructor_expr (postfix_expression,
4809 s, TREE_TYPE (type));
4813 if (!pseudo_destructor_p)
4815 /* If the SCOPE is not a scalar type, we are looking at an
4816 ordinary class member access expression, rather than a
4817 pseudo-destructor-name. */
4819 /* Parse the id-expression. */
4820 name = (cp_parser_id_expression
4822 cp_parser_optional_template_keyword (parser),
4823 /*check_dependency_p=*/true,
4825 /*declarator_p=*/false,
4826 /*optional_p=*/false));
4827 /* In general, build a SCOPE_REF if the member name is qualified.
4828 However, if the name was not dependent and has already been
4829 resolved; there is no need to build the SCOPE_REF. For example;
4831 struct X { void f(); };
4832 template <typename T> void f(T* t) { t->X::f(); }
4834 Even though "t" is dependent, "X::f" is not and has been resolved
4835 to a BASELINK; there is no need to include scope information. */
4837 /* But we do need to remember that there was an explicit scope for
4838 virtual function calls. */
4840 *idk = CP_ID_KIND_QUALIFIED;
4842 /* If the name is a template-id that names a type, we will get a
4843 TYPE_DECL here. That is invalid code. */
4844 if (TREE_CODE (name) == TYPE_DECL)
4846 error ("invalid use of %qD", name);
4847 postfix_expression = error_mark_node;
4851 if (name != error_mark_node && !BASELINK_P (name) && parser->scope)
4853 name = build_qualified_name (/*type=*/NULL_TREE,
4857 parser->scope = NULL_TREE;
4858 parser->qualifying_scope = NULL_TREE;
4859 parser->object_scope = NULL_TREE;
4861 if (scope && name && BASELINK_P (name))
4862 adjust_result_of_qualified_name_lookup
4863 (name, BINFO_TYPE (BASELINK_ACCESS_BINFO (name)), scope);
4865 = finish_class_member_access_expr (postfix_expression, name,
4870 /* We no longer need to look up names in the scope of the object on
4871 the left-hand side of the `.' or `->' operator. */
4872 parser->context->object_type = NULL_TREE;
4874 /* Outside of offsetof, these operators may not appear in
4875 constant-expressions. */
4877 && (cp_parser_non_integral_constant_expression
4878 (parser, token_type == CPP_DEREF ? "'->'" : "`.'")))
4879 postfix_expression = error_mark_node;
4881 return postfix_expression;
4884 /* Parse a parenthesized expression-list.
4887 assignment-expression
4888 expression-list, assignment-expression
4893 identifier, expression-list
4895 CAST_P is true if this expression is the target of a cast.
4897 ALLOW_EXPANSION_P is true if this expression allows expansion of an
4900 Returns a TREE_LIST. The TREE_VALUE of each node is a
4901 representation of an assignment-expression. Note that a TREE_LIST
4902 is returned even if there is only a single expression in the list.
4903 error_mark_node is returned if the ( and or ) are
4904 missing. NULL_TREE is returned on no expressions. The parentheses
4905 are eaten. IS_ATTRIBUTE_LIST is true if this is really an attribute
4906 list being parsed. If NON_CONSTANT_P is non-NULL, *NON_CONSTANT_P
4907 indicates whether or not all of the expressions in the list were
4911 cp_parser_parenthesized_expression_list (cp_parser* parser,
4912 bool is_attribute_list,
4914 bool allow_expansion_p,
4915 bool *non_constant_p)
4917 tree expression_list = NULL_TREE;
4918 bool fold_expr_p = is_attribute_list;
4919 tree identifier = NULL_TREE;
4921 /* Assume all the expressions will be constant. */
4923 *non_constant_p = false;
4925 if (!cp_parser_require (parser, CPP_OPEN_PAREN, "`('"))
4926 return error_mark_node;
4928 /* Consume expressions until there are no more. */
4929 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN))
4934 /* At the beginning of attribute lists, check to see if the
4935 next token is an identifier. */
4936 if (is_attribute_list
4937 && cp_lexer_peek_token (parser->lexer)->type == CPP_NAME)
4941 /* Consume the identifier. */
4942 token = cp_lexer_consume_token (parser->lexer);
4943 /* Save the identifier. */
4944 identifier = token->u.value;
4948 /* Parse the next assignment-expression. */
4951 bool expr_non_constant_p;
4952 expr = (cp_parser_constant_expression
4953 (parser, /*allow_non_constant_p=*/true,
4954 &expr_non_constant_p));
4955 if (expr_non_constant_p)
4956 *non_constant_p = true;
4959 expr = cp_parser_assignment_expression (parser, cast_p);
4962 expr = fold_non_dependent_expr (expr);
4964 /* If we have an ellipsis, then this is an expression
4966 if (allow_expansion_p
4967 && cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
4969 /* Consume the `...'. */
4970 cp_lexer_consume_token (parser->lexer);
4972 /* Build the argument pack. */
4973 expr = make_pack_expansion (expr);
4976 /* Add it to the list. We add error_mark_node
4977 expressions to the list, so that we can still tell if
4978 the correct form for a parenthesized expression-list
4979 is found. That gives better errors. */
4980 expression_list = tree_cons (NULL_TREE, expr, expression_list);
4982 if (expr == error_mark_node)
4986 /* After the first item, attribute lists look the same as
4987 expression lists. */
4988 is_attribute_list = false;
4991 /* If the next token isn't a `,', then we are done. */
4992 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
4995 /* Otherwise, consume the `,' and keep going. */
4996 cp_lexer_consume_token (parser->lexer);
4999 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
5004 /* We try and resync to an unnested comma, as that will give the
5005 user better diagnostics. */
5006 ending = cp_parser_skip_to_closing_parenthesis (parser,
5007 /*recovering=*/true,
5009 /*consume_paren=*/true);
5013 return error_mark_node;
5016 /* We built up the list in reverse order so we must reverse it now. */
5017 expression_list = nreverse (expression_list);
5019 expression_list = tree_cons (NULL_TREE, identifier, expression_list);
5021 return expression_list;
5024 /* Parse a pseudo-destructor-name.
5026 pseudo-destructor-name:
5027 :: [opt] nested-name-specifier [opt] type-name :: ~ type-name
5028 :: [opt] nested-name-specifier template template-id :: ~ type-name
5029 :: [opt] nested-name-specifier [opt] ~ type-name
5031 If either of the first two productions is used, sets *SCOPE to the
5032 TYPE specified before the final `::'. Otherwise, *SCOPE is set to
5033 NULL_TREE. *TYPE is set to the TYPE_DECL for the final type-name,
5034 or ERROR_MARK_NODE if the parse fails. */
5037 cp_parser_pseudo_destructor_name (cp_parser* parser,
5041 bool nested_name_specifier_p;
5043 /* Assume that things will not work out. */
5044 *type = error_mark_node;
5046 /* Look for the optional `::' operator. */
5047 cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/true);
5048 /* Look for the optional nested-name-specifier. */
5049 nested_name_specifier_p
5050 = (cp_parser_nested_name_specifier_opt (parser,
5051 /*typename_keyword_p=*/false,
5052 /*check_dependency_p=*/true,
5054 /*is_declaration=*/true)
5056 /* Now, if we saw a nested-name-specifier, we might be doing the
5057 second production. */
5058 if (nested_name_specifier_p
5059 && cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
5061 /* Consume the `template' keyword. */
5062 cp_lexer_consume_token (parser->lexer);
5063 /* Parse the template-id. */
5064 cp_parser_template_id (parser,
5065 /*template_keyword_p=*/true,
5066 /*check_dependency_p=*/false,
5067 /*is_declaration=*/true);
5068 /* Look for the `::' token. */
5069 cp_parser_require (parser, CPP_SCOPE, "`::'");
5071 /* If the next token is not a `~', then there might be some
5072 additional qualification. */
5073 else if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMPL))
5075 /* Look for the type-name. */
5076 *scope = TREE_TYPE (cp_parser_type_name (parser));
5078 if (*scope == error_mark_node)
5081 /* If we don't have ::~, then something has gone wrong. Since
5082 the only caller of this function is looking for something
5083 after `.' or `->' after a scalar type, most likely the
5084 program is trying to get a member of a non-aggregate
5086 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SCOPE)
5087 || cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_COMPL)
5089 cp_parser_error (parser, "request for member of non-aggregate type");
5093 /* Look for the `::' token. */
5094 cp_parser_require (parser, CPP_SCOPE, "`::'");
5099 /* Look for the `~'. */
5100 cp_parser_require (parser, CPP_COMPL, "`~'");
5101 /* Look for the type-name again. We are not responsible for
5102 checking that it matches the first type-name. */
5103 *type = cp_parser_type_name (parser);
5106 /* Parse a unary-expression.
5112 unary-operator cast-expression
5113 sizeof unary-expression
5121 __extension__ cast-expression
5122 __alignof__ unary-expression
5123 __alignof__ ( type-id )
5124 __real__ cast-expression
5125 __imag__ cast-expression
5128 ADDRESS_P is true iff the unary-expression is appearing as the
5129 operand of the `&' operator. CAST_P is true if this expression is
5130 the target of a cast.
5132 Returns a representation of the expression. */
5135 cp_parser_unary_expression (cp_parser *parser, bool address_p, bool cast_p)
5138 enum tree_code unary_operator;
5140 /* Peek at the next token. */
5141 token = cp_lexer_peek_token (parser->lexer);
5142 /* Some keywords give away the kind of expression. */
5143 if (token->type == CPP_KEYWORD)
5145 enum rid keyword = token->keyword;
5155 op = keyword == RID_ALIGNOF ? ALIGNOF_EXPR : SIZEOF_EXPR;
5156 /* Consume the token. */
5157 cp_lexer_consume_token (parser->lexer);
5158 /* Parse the operand. */
5159 operand = cp_parser_sizeof_operand (parser, keyword);
5161 if (TYPE_P (operand))
5162 return cxx_sizeof_or_alignof_type (operand, op, true);
5164 return cxx_sizeof_or_alignof_expr (operand, op);
5168 return cp_parser_new_expression (parser);
5171 return cp_parser_delete_expression (parser);
5175 /* The saved value of the PEDANTIC flag. */
5179 /* Save away the PEDANTIC flag. */
5180 cp_parser_extension_opt (parser, &saved_pedantic);
5181 /* Parse the cast-expression. */
5182 expr = cp_parser_simple_cast_expression (parser);
5183 /* Restore the PEDANTIC flag. */
5184 pedantic = saved_pedantic;
5194 /* Consume the `__real__' or `__imag__' token. */
5195 cp_lexer_consume_token (parser->lexer);
5196 /* Parse the cast-expression. */
5197 expression = cp_parser_simple_cast_expression (parser);
5198 /* Create the complete representation. */
5199 return build_x_unary_op ((keyword == RID_REALPART
5200 ? REALPART_EXPR : IMAGPART_EXPR),
5210 /* Look for the `:: new' and `:: delete', which also signal the
5211 beginning of a new-expression, or delete-expression,
5212 respectively. If the next token is `::', then it might be one of
5214 if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
5218 /* See if the token after the `::' is one of the keywords in
5219 which we're interested. */
5220 keyword = cp_lexer_peek_nth_token (parser->lexer, 2)->keyword;
5221 /* If it's `new', we have a new-expression. */
5222 if (keyword == RID_NEW)
5223 return cp_parser_new_expression (parser);
5224 /* Similarly, for `delete'. */
5225 else if (keyword == RID_DELETE)
5226 return cp_parser_delete_expression (parser);
5229 /* Look for a unary operator. */
5230 unary_operator = cp_parser_unary_operator (token);
5231 /* The `++' and `--' operators can be handled similarly, even though
5232 they are not technically unary-operators in the grammar. */
5233 if (unary_operator == ERROR_MARK)
5235 if (token->type == CPP_PLUS_PLUS)
5236 unary_operator = PREINCREMENT_EXPR;
5237 else if (token->type == CPP_MINUS_MINUS)
5238 unary_operator = PREDECREMENT_EXPR;
5239 /* Handle the GNU address-of-label extension. */
5240 else if (cp_parser_allow_gnu_extensions_p (parser)
5241 && token->type == CPP_AND_AND)
5245 /* Consume the '&&' token. */
5246 cp_lexer_consume_token (parser->lexer);
5247 /* Look for the identifier. */
5248 identifier = cp_parser_identifier (parser);
5249 /* Create an expression representing the address. */
5250 return finish_label_address_expr (identifier);
5253 if (unary_operator != ERROR_MARK)
5255 tree cast_expression;
5256 tree expression = error_mark_node;
5257 const char *non_constant_p = NULL;
5259 /* Consume the operator token. */
5260 token = cp_lexer_consume_token (parser->lexer);
5261 /* Parse the cast-expression. */
5263 = cp_parser_cast_expression (parser,
5264 unary_operator == ADDR_EXPR,
5266 /* Now, build an appropriate representation. */
5267 switch (unary_operator)
5270 non_constant_p = "`*'";
5271 expression = build_x_indirect_ref (cast_expression, "unary *");
5275 non_constant_p = "`&'";
5278 expression = build_x_unary_op (unary_operator, cast_expression);
5281 case PREINCREMENT_EXPR:
5282 case PREDECREMENT_EXPR:
5283 non_constant_p = (unary_operator == PREINCREMENT_EXPR
5286 case UNARY_PLUS_EXPR:
5288 case TRUTH_NOT_EXPR:
5289 expression = finish_unary_op_expr (unary_operator, cast_expression);
5297 && cp_parser_non_integral_constant_expression (parser,
5299 expression = error_mark_node;
5304 return cp_parser_postfix_expression (parser, address_p, cast_p);
5307 /* Returns ERROR_MARK if TOKEN is not a unary-operator. If TOKEN is a
5308 unary-operator, the corresponding tree code is returned. */
5310 static enum tree_code
5311 cp_parser_unary_operator (cp_token* token)
5313 switch (token->type)
5316 return INDIRECT_REF;
5322 return UNARY_PLUS_EXPR;
5328 return TRUTH_NOT_EXPR;
5331 return BIT_NOT_EXPR;
5338 /* Parse a new-expression.
5341 :: [opt] new new-placement [opt] new-type-id new-initializer [opt]
5342 :: [opt] new new-placement [opt] ( type-id ) new-initializer [opt]
5344 Returns a representation of the expression. */
5347 cp_parser_new_expression (cp_parser* parser)
5349 bool global_scope_p;
5355 /* Look for the optional `::' operator. */
5357 = (cp_parser_global_scope_opt (parser,
5358 /*current_scope_valid_p=*/false)
5360 /* Look for the `new' operator. */
5361 cp_parser_require_keyword (parser, RID_NEW, "`new'");
5362 /* There's no easy way to tell a new-placement from the
5363 `( type-id )' construct. */
5364 cp_parser_parse_tentatively (parser);
5365 /* Look for a new-placement. */
5366 placement = cp_parser_new_placement (parser);
5367 /* If that didn't work out, there's no new-placement. */
5368 if (!cp_parser_parse_definitely (parser))
5369 placement = NULL_TREE;
5371 /* If the next token is a `(', then we have a parenthesized
5373 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
5375 /* Consume the `('. */
5376 cp_lexer_consume_token (parser->lexer);
5377 /* Parse the type-id. */
5378 type = cp_parser_type_id (parser);
5379 /* Look for the closing `)'. */
5380 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
5381 /* There should not be a direct-new-declarator in this production,
5382 but GCC used to allowed this, so we check and emit a sensible error
5383 message for this case. */
5384 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
5386 error ("array bound forbidden after parenthesized type-id");
5387 inform ("try removing the parentheses around the type-id");
5388 cp_parser_direct_new_declarator (parser);
5392 /* Otherwise, there must be a new-type-id. */
5394 type = cp_parser_new_type_id (parser, &nelts);
5396 /* If the next token is a `(', then we have a new-initializer. */
5397 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
5398 initializer = cp_parser_new_initializer (parser);
5400 initializer = NULL_TREE;
5402 /* A new-expression may not appear in an integral constant
5404 if (cp_parser_non_integral_constant_expression (parser, "`new'"))
5405 return error_mark_node;
5407 /* Create a representation of the new-expression. */
5408 return build_new (placement, type, nelts, initializer, global_scope_p);
5411 /* Parse a new-placement.
5416 Returns the same representation as for an expression-list. */
5419 cp_parser_new_placement (cp_parser* parser)
5421 tree expression_list;
5423 /* Parse the expression-list. */
5424 expression_list = (cp_parser_parenthesized_expression_list
5425 (parser, false, /*cast_p=*/false, /*allow_expansion_p=*/true,
5426 /*non_constant_p=*/NULL));
5428 return expression_list;
5431 /* Parse a new-type-id.
5434 type-specifier-seq new-declarator [opt]
5436 Returns the TYPE allocated. If the new-type-id indicates an array
5437 type, *NELTS is set to the number of elements in the last array
5438 bound; the TYPE will not include the last array bound. */
5441 cp_parser_new_type_id (cp_parser* parser, tree *nelts)
5443 cp_decl_specifier_seq type_specifier_seq;
5444 cp_declarator *new_declarator;
5445 cp_declarator *declarator;
5446 cp_declarator *outer_declarator;
5447 const char *saved_message;
5450 /* The type-specifier sequence must not contain type definitions.
5451 (It cannot contain declarations of new types either, but if they
5452 are not definitions we will catch that because they are not
5454 saved_message = parser->type_definition_forbidden_message;
5455 parser->type_definition_forbidden_message
5456 = "types may not be defined in a new-type-id";
5457 /* Parse the type-specifier-seq. */
5458 cp_parser_type_specifier_seq (parser, /*is_condition=*/false,
5459 &type_specifier_seq);
5460 /* Restore the old message. */
5461 parser->type_definition_forbidden_message = saved_message;
5462 /* Parse the new-declarator. */
5463 new_declarator = cp_parser_new_declarator_opt (parser);
5465 /* Determine the number of elements in the last array dimension, if
5468 /* Skip down to the last array dimension. */
5469 declarator = new_declarator;
5470 outer_declarator = NULL;
5471 while (declarator && (declarator->kind == cdk_pointer
5472 || declarator->kind == cdk_ptrmem))
5474 outer_declarator = declarator;
5475 declarator = declarator->declarator;
5478 && declarator->kind == cdk_array
5479 && declarator->declarator
5480 && declarator->declarator->kind == cdk_array)
5482 outer_declarator = declarator;
5483 declarator = declarator->declarator;
5486 if (declarator && declarator->kind == cdk_array)
5488 *nelts = declarator->u.array.bounds;
5489 if (*nelts == error_mark_node)
5490 *nelts = integer_one_node;
5492 if (outer_declarator)
5493 outer_declarator->declarator = declarator->declarator;
5495 new_declarator = NULL;
5498 type = groktypename (&type_specifier_seq, new_declarator);
5499 if (TREE_CODE (type) == ARRAY_TYPE && *nelts == NULL_TREE)
5501 *nelts = array_type_nelts_top (type);
5502 type = TREE_TYPE (type);
5507 /* Parse an (optional) new-declarator.
5510 ptr-operator new-declarator [opt]
5511 direct-new-declarator
5513 Returns the declarator. */
5515 static cp_declarator *
5516 cp_parser_new_declarator_opt (cp_parser* parser)
5518 enum tree_code code;
5520 cp_cv_quals cv_quals;
5522 /* We don't know if there's a ptr-operator next, or not. */
5523 cp_parser_parse_tentatively (parser);
5524 /* Look for a ptr-operator. */
5525 code = cp_parser_ptr_operator (parser, &type, &cv_quals);
5526 /* If that worked, look for more new-declarators. */
5527 if (cp_parser_parse_definitely (parser))
5529 cp_declarator *declarator;
5531 /* Parse another optional declarator. */
5532 declarator = cp_parser_new_declarator_opt (parser);
5534 /* Create the representation of the declarator. */
5536 declarator = make_ptrmem_declarator (cv_quals, type, declarator);
5537 else if (code == INDIRECT_REF)
5538 declarator = make_pointer_declarator (cv_quals, declarator);
5540 declarator = make_reference_declarator (cv_quals, declarator);
5545 /* If the next token is a `[', there is a direct-new-declarator. */
5546 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
5547 return cp_parser_direct_new_declarator (parser);
5552 /* Parse a direct-new-declarator.
5554 direct-new-declarator:
5556 direct-new-declarator [constant-expression]
5560 static cp_declarator *
5561 cp_parser_direct_new_declarator (cp_parser* parser)
5563 cp_declarator *declarator = NULL;
5569 /* Look for the opening `['. */
5570 cp_parser_require (parser, CPP_OPEN_SQUARE, "`['");
5571 /* The first expression is not required to be constant. */
5574 expression = cp_parser_expression (parser, /*cast_p=*/false);
5575 /* The standard requires that the expression have integral
5576 type. DR 74 adds enumeration types. We believe that the
5577 real intent is that these expressions be handled like the
5578 expression in a `switch' condition, which also allows
5579 classes with a single conversion to integral or
5580 enumeration type. */
5581 if (!processing_template_decl)
5584 = build_expr_type_conversion (WANT_INT | WANT_ENUM,
5589 error ("expression in new-declarator must have integral "
5590 "or enumeration type");
5591 expression = error_mark_node;
5595 /* But all the other expressions must be. */
5598 = cp_parser_constant_expression (parser,
5599 /*allow_non_constant=*/false,
5601 /* Look for the closing `]'. */
5602 cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'");
5604 /* Add this bound to the declarator. */
5605 declarator = make_array_declarator (declarator, expression);
5607 /* If the next token is not a `[', then there are no more
5609 if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_SQUARE))
5616 /* Parse a new-initializer.
5619 ( expression-list [opt] )
5621 Returns a representation of the expression-list. If there is no
5622 expression-list, VOID_ZERO_NODE is returned. */
5625 cp_parser_new_initializer (cp_parser* parser)
5627 tree expression_list;
5629 expression_list = (cp_parser_parenthesized_expression_list
5630 (parser, false, /*cast_p=*/false, /*allow_expansion_p=*/true,
5631 /*non_constant_p=*/NULL));
5632 if (!expression_list)
5633 expression_list = void_zero_node;
5635 return expression_list;
5638 /* Parse a delete-expression.
5641 :: [opt] delete cast-expression
5642 :: [opt] delete [ ] cast-expression
5644 Returns a representation of the expression. */
5647 cp_parser_delete_expression (cp_parser* parser)
5649 bool global_scope_p;
5653 /* Look for the optional `::' operator. */
5655 = (cp_parser_global_scope_opt (parser,
5656 /*current_scope_valid_p=*/false)
5658 /* Look for the `delete' keyword. */
5659 cp_parser_require_keyword (parser, RID_DELETE, "`delete'");
5660 /* See if the array syntax is in use. */
5661 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
5663 /* Consume the `[' token. */
5664 cp_lexer_consume_token (parser->lexer);
5665 /* Look for the `]' token. */
5666 cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'");
5667 /* Remember that this is the `[]' construct. */
5673 /* Parse the cast-expression. */
5674 expression = cp_parser_simple_cast_expression (parser);
5676 /* A delete-expression may not appear in an integral constant
5678 if (cp_parser_non_integral_constant_expression (parser, "`delete'"))
5679 return error_mark_node;
5681 return delete_sanity (expression, NULL_TREE, array_p, global_scope_p);
5684 /* Parse a cast-expression.
5688 ( type-id ) cast-expression
5690 ADDRESS_P is true iff the unary-expression is appearing as the
5691 operand of the `&' operator. CAST_P is true if this expression is
5692 the target of a cast.
5694 Returns a representation of the expression. */
5697 cp_parser_cast_expression (cp_parser *parser, bool address_p, bool cast_p)
5699 /* If it's a `(', then we might be looking at a cast. */
5700 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
5702 tree type = NULL_TREE;
5703 tree expr = NULL_TREE;
5704 bool compound_literal_p;
5705 const char *saved_message;
5707 /* There's no way to know yet whether or not this is a cast.
5708 For example, `(int (3))' is a unary-expression, while `(int)
5709 3' is a cast. So, we resort to parsing tentatively. */
5710 cp_parser_parse_tentatively (parser);
5711 /* Types may not be defined in a cast. */
5712 saved_message = parser->type_definition_forbidden_message;
5713 parser->type_definition_forbidden_message
5714 = "types may not be defined in casts";
5715 /* Consume the `('. */
5716 cp_lexer_consume_token (parser->lexer);
5717 /* A very tricky bit is that `(struct S) { 3 }' is a
5718 compound-literal (which we permit in C++ as an extension).
5719 But, that construct is not a cast-expression -- it is a
5720 postfix-expression. (The reason is that `(struct S) { 3 }.i'
5721 is legal; if the compound-literal were a cast-expression,
5722 you'd need an extra set of parentheses.) But, if we parse
5723 the type-id, and it happens to be a class-specifier, then we
5724 will commit to the parse at that point, because we cannot
5725 undo the action that is done when creating a new class. So,
5726 then we cannot back up and do a postfix-expression.
5728 Therefore, we scan ahead to the closing `)', and check to see
5729 if the token after the `)' is a `{'. If so, we are not
5730 looking at a cast-expression.
5732 Save tokens so that we can put them back. */
5733 cp_lexer_save_tokens (parser->lexer);
5734 /* Skip tokens until the next token is a closing parenthesis.
5735 If we find the closing `)', and the next token is a `{', then
5736 we are looking at a compound-literal. */
5738 = (cp_parser_skip_to_closing_parenthesis (parser, false, false,
5739 /*consume_paren=*/true)
5740 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE));
5741 /* Roll back the tokens we skipped. */
5742 cp_lexer_rollback_tokens (parser->lexer);
5743 /* If we were looking at a compound-literal, simulate an error
5744 so that the call to cp_parser_parse_definitely below will
5746 if (compound_literal_p)
5747 cp_parser_simulate_error (parser);
5750 bool saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
5751 parser->in_type_id_in_expr_p = true;
5752 /* Look for the type-id. */
5753 type = cp_parser_type_id (parser);
5754 /* Look for the closing `)'. */
5755 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
5756 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
5759 /* Restore the saved message. */
5760 parser->type_definition_forbidden_message = saved_message;
5762 /* If ok so far, parse the dependent expression. We cannot be
5763 sure it is a cast. Consider `(T ())'. It is a parenthesized
5764 ctor of T, but looks like a cast to function returning T
5765 without a dependent expression. */
5766 if (!cp_parser_error_occurred (parser))
5767 expr = cp_parser_cast_expression (parser,
5768 /*address_p=*/false,
5771 if (cp_parser_parse_definitely (parser))
5773 /* Warn about old-style casts, if so requested. */
5774 if (warn_old_style_cast
5775 && !in_system_header
5776 && !VOID_TYPE_P (type)
5777 && current_lang_name != lang_name_c)
5778 warning (OPT_Wold_style_cast, "use of old-style cast");
5780 /* Only type conversions to integral or enumeration types
5781 can be used in constant-expressions. */
5782 if (!cast_valid_in_integral_constant_expression_p (type)
5783 && (cp_parser_non_integral_constant_expression
5785 "a cast to a type other than an integral or "
5786 "enumeration type")))
5787 return error_mark_node;
5789 /* Perform the cast. */
5790 expr = build_c_cast (type, expr);
5795 /* If we get here, then it's not a cast, so it must be a
5796 unary-expression. */
5797 return cp_parser_unary_expression (parser, address_p, cast_p);
5800 /* Parse a binary expression of the general form:
5804 pm-expression .* cast-expression
5805 pm-expression ->* cast-expression
5807 multiplicative-expression:
5809 multiplicative-expression * pm-expression
5810 multiplicative-expression / pm-expression
5811 multiplicative-expression % pm-expression
5813 additive-expression:
5814 multiplicative-expression
5815 additive-expression + multiplicative-expression
5816 additive-expression - multiplicative-expression
5820 shift-expression << additive-expression
5821 shift-expression >> additive-expression
5823 relational-expression:
5825 relational-expression < shift-expression
5826 relational-expression > shift-expression
5827 relational-expression <= shift-expression
5828 relational-expression >= shift-expression
5832 relational-expression:
5833 relational-expression <? shift-expression
5834 relational-expression >? shift-expression
5836 equality-expression:
5837 relational-expression
5838 equality-expression == relational-expression
5839 equality-expression != relational-expression
5843 and-expression & equality-expression
5845 exclusive-or-expression:
5847 exclusive-or-expression ^ and-expression
5849 inclusive-or-expression:
5850 exclusive-or-expression
5851 inclusive-or-expression | exclusive-or-expression
5853 logical-and-expression:
5854 inclusive-or-expression
5855 logical-and-expression && inclusive-or-expression
5857 logical-or-expression:
5858 logical-and-expression
5859 logical-or-expression || logical-and-expression
5861 All these are implemented with a single function like:
5864 simple-cast-expression
5865 binary-expression <token> binary-expression
5867 CAST_P is true if this expression is the target of a cast.
5869 The binops_by_token map is used to get the tree codes for each <token> type.
5870 binary-expressions are associated according to a precedence table. */
5872 #define TOKEN_PRECEDENCE(token) \
5873 (((token->type == CPP_GREATER \
5874 || (flag_cpp0x && token->type == CPP_RSHIFT)) \
5875 && !parser->greater_than_is_operator_p) \
5876 ? PREC_NOT_OPERATOR \
5877 : binops_by_token[token->type].prec)
5880 cp_parser_binary_expression (cp_parser* parser, bool cast_p)
5882 cp_parser_expression_stack stack;
5883 cp_parser_expression_stack_entry *sp = &stack[0];
5886 enum tree_code tree_type, lhs_type, rhs_type;
5887 enum cp_parser_prec prec = PREC_NOT_OPERATOR, new_prec, lookahead_prec;
5890 /* Parse the first expression. */
5891 lhs = cp_parser_cast_expression (parser, /*address_p=*/false, cast_p);
5892 lhs_type = ERROR_MARK;
5896 /* Get an operator token. */
5897 token = cp_lexer_peek_token (parser->lexer);
5899 if (warn_cxx0x_compat
5900 && token->type == CPP_RSHIFT
5901 && !parser->greater_than_is_operator_p)
5903 warning (OPT_Wc__0x_compat,
5904 "%H%<>>%> operator will be treated as two right angle brackets in C++0x",
5906 warning (OPT_Wc__0x_compat,
5907 "suggest parentheses around %<>>%> expression");
5910 new_prec = TOKEN_PRECEDENCE (token);
5912 /* Popping an entry off the stack means we completed a subexpression:
5913 - either we found a token which is not an operator (`>' where it is not
5914 an operator, or prec == PREC_NOT_OPERATOR), in which case popping
5915 will happen repeatedly;
5916 - or, we found an operator which has lower priority. This is the case
5917 where the recursive descent *ascends*, as in `3 * 4 + 5' after
5919 if (new_prec <= prec)
5928 tree_type = binops_by_token[token->type].tree_type;
5930 /* We used the operator token. */
5931 cp_lexer_consume_token (parser->lexer);
5933 /* Extract another operand. It may be the RHS of this expression
5934 or the LHS of a new, higher priority expression. */
5935 rhs = cp_parser_simple_cast_expression (parser);
5936 rhs_type = ERROR_MARK;
5938 /* Get another operator token. Look up its precedence to avoid
5939 building a useless (immediately popped) stack entry for common
5940 cases such as 3 + 4 + 5 or 3 * 4 + 5. */
5941 token = cp_lexer_peek_token (parser->lexer);
5942 lookahead_prec = TOKEN_PRECEDENCE (token);
5943 if (lookahead_prec > new_prec)
5945 /* ... and prepare to parse the RHS of the new, higher priority
5946 expression. Since precedence levels on the stack are
5947 monotonically increasing, we do not have to care about
5950 sp->tree_type = tree_type;
5952 sp->lhs_type = lhs_type;
5955 lhs_type = rhs_type;
5957 new_prec = lookahead_prec;
5961 /* If the stack is not empty, we have parsed into LHS the right side
5962 (`4' in the example above) of an expression we had suspended.
5963 We can use the information on the stack to recover the LHS (`3')
5964 from the stack together with the tree code (`MULT_EXPR'), and
5965 the precedence of the higher level subexpression
5966 (`PREC_ADDITIVE_EXPRESSION'). TOKEN is the CPP_PLUS token,
5967 which will be used to actually build the additive expression. */
5970 tree_type = sp->tree_type;
5972 rhs_type = lhs_type;
5974 lhs_type = sp->lhs_type;
5977 overloaded_p = false;
5978 lhs = build_x_binary_op (tree_type, lhs, lhs_type, rhs, rhs_type,
5980 lhs_type = tree_type;
5982 /* If the binary operator required the use of an overloaded operator,
5983 then this expression cannot be an integral constant-expression.
5984 An overloaded operator can be used even if both operands are
5985 otherwise permissible in an integral constant-expression if at
5986 least one of the operands is of enumeration type. */
5989 && (cp_parser_non_integral_constant_expression
5990 (parser, "calls to overloaded operators")))
5991 return error_mark_node;
5998 /* Parse the `? expression : assignment-expression' part of a
5999 conditional-expression. The LOGICAL_OR_EXPR is the
6000 logical-or-expression that started the conditional-expression.
6001 Returns a representation of the entire conditional-expression.
6003 This routine is used by cp_parser_assignment_expression.
6005 ? expression : assignment-expression
6009 ? : assignment-expression */
6012 cp_parser_question_colon_clause (cp_parser* parser, tree logical_or_expr)
6015 tree assignment_expr;
6017 /* Consume the `?' token. */
6018 cp_lexer_consume_token (parser->lexer);
6019 if (cp_parser_allow_gnu_extensions_p (parser)
6020 && cp_lexer_next_token_is (parser->lexer, CPP_COLON))
6021 /* Implicit true clause. */
6024 /* Parse the expression. */
6025 expr = cp_parser_expression (parser, /*cast_p=*/false);
6027 /* The next token should be a `:'. */
6028 cp_parser_require (parser, CPP_COLON, "`:'");
6029 /* Parse the assignment-expression. */
6030 assignment_expr = cp_parser_assignment_expression (parser, /*cast_p=*/false);
6032 /* Build the conditional-expression. */
6033 return build_x_conditional_expr (logical_or_expr,
6038 /* Parse an assignment-expression.
6040 assignment-expression:
6041 conditional-expression
6042 logical-or-expression assignment-operator assignment_expression
6045 CAST_P is true if this expression is the target of a cast.
6047 Returns a representation for the expression. */
6050 cp_parser_assignment_expression (cp_parser* parser, bool cast_p)
6054 /* If the next token is the `throw' keyword, then we're looking at
6055 a throw-expression. */
6056 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_THROW))
6057 expr = cp_parser_throw_expression (parser);
6058 /* Otherwise, it must be that we are looking at a
6059 logical-or-expression. */
6062 /* Parse the binary expressions (logical-or-expression). */
6063 expr = cp_parser_binary_expression (parser, cast_p);
6064 /* If the next token is a `?' then we're actually looking at a
6065 conditional-expression. */
6066 if (cp_lexer_next_token_is (parser->lexer, CPP_QUERY))
6067 return cp_parser_question_colon_clause (parser, expr);
6070 enum tree_code assignment_operator;
6072 /* If it's an assignment-operator, we're using the second
6075 = cp_parser_assignment_operator_opt (parser);
6076 if (assignment_operator != ERROR_MARK)
6080 /* Parse the right-hand side of the assignment. */
6081 rhs = cp_parser_assignment_expression (parser, cast_p);
6082 /* An assignment may not appear in a
6083 constant-expression. */
6084 if (cp_parser_non_integral_constant_expression (parser,
6086 return error_mark_node;
6087 /* Build the assignment expression. */
6088 expr = build_x_modify_expr (expr,
6089 assignment_operator,
6098 /* Parse an (optional) assignment-operator.
6100 assignment-operator: one of
6101 = *= /= %= += -= >>= <<= &= ^= |=
6105 assignment-operator: one of
6108 If the next token is an assignment operator, the corresponding tree
6109 code is returned, and the token is consumed. For example, for
6110 `+=', PLUS_EXPR is returned. For `=' itself, the code returned is
6111 NOP_EXPR. For `/', TRUNC_DIV_EXPR is returned; for `%',
6112 TRUNC_MOD_EXPR is returned. If TOKEN is not an assignment
6113 operator, ERROR_MARK is returned. */
6115 static enum tree_code
6116 cp_parser_assignment_operator_opt (cp_parser* parser)
6121 /* Peek at the next toen. */
6122 token = cp_lexer_peek_token (parser->lexer);
6124 switch (token->type)
6135 op = TRUNC_DIV_EXPR;
6139 op = TRUNC_MOD_EXPR;
6171 /* Nothing else is an assignment operator. */
6175 /* If it was an assignment operator, consume it. */
6176 if (op != ERROR_MARK)
6177 cp_lexer_consume_token (parser->lexer);
6182 /* Parse an expression.
6185 assignment-expression
6186 expression , assignment-expression
6188 CAST_P is true if this expression is the target of a cast.
6190 Returns a representation of the expression. */
6193 cp_parser_expression (cp_parser* parser, bool cast_p)
6195 tree expression = NULL_TREE;
6199 tree assignment_expression;
6201 /* Parse the next assignment-expression. */
6202 assignment_expression
6203 = cp_parser_assignment_expression (parser, cast_p);
6204 /* If this is the first assignment-expression, we can just
6207 expression = assignment_expression;
6209 expression = build_x_compound_expr (expression,
6210 assignment_expression);
6211 /* If the next token is not a comma, then we are done with the
6213 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
6215 /* Consume the `,'. */
6216 cp_lexer_consume_token (parser->lexer);
6217 /* A comma operator cannot appear in a constant-expression. */
6218 if (cp_parser_non_integral_constant_expression (parser,
6219 "a comma operator"))
6220 expression = error_mark_node;
6226 /* Parse a constant-expression.
6228 constant-expression:
6229 conditional-expression
6231 If ALLOW_NON_CONSTANT_P a non-constant expression is silently
6232 accepted. If ALLOW_NON_CONSTANT_P is true and the expression is not
6233 constant, *NON_CONSTANT_P is set to TRUE. If ALLOW_NON_CONSTANT_P
6234 is false, NON_CONSTANT_P should be NULL. */
6237 cp_parser_constant_expression (cp_parser* parser,
6238 bool allow_non_constant_p,
6239 bool *non_constant_p)
6241 bool saved_integral_constant_expression_p;
6242 bool saved_allow_non_integral_constant_expression_p;
6243 bool saved_non_integral_constant_expression_p;
6246 /* It might seem that we could simply parse the
6247 conditional-expression, and then check to see if it were
6248 TREE_CONSTANT. However, an expression that is TREE_CONSTANT is
6249 one that the compiler can figure out is constant, possibly after
6250 doing some simplifications or optimizations. The standard has a
6251 precise definition of constant-expression, and we must honor
6252 that, even though it is somewhat more restrictive.
6258 is not a legal declaration, because `(2, 3)' is not a
6259 constant-expression. The `,' operator is forbidden in a
6260 constant-expression. However, GCC's constant-folding machinery
6261 will fold this operation to an INTEGER_CST for `3'. */
6263 /* Save the old settings. */
6264 saved_integral_constant_expression_p = parser->integral_constant_expression_p;
6265 saved_allow_non_integral_constant_expression_p
6266 = parser->allow_non_integral_constant_expression_p;
6267 saved_non_integral_constant_expression_p = parser->non_integral_constant_expression_p;
6268 /* We are now parsing a constant-expression. */
6269 parser->integral_constant_expression_p = true;
6270 parser->allow_non_integral_constant_expression_p = allow_non_constant_p;
6271 parser->non_integral_constant_expression_p = false;
6272 /* Although the grammar says "conditional-expression", we parse an
6273 "assignment-expression", which also permits "throw-expression"
6274 and the use of assignment operators. In the case that
6275 ALLOW_NON_CONSTANT_P is false, we get better errors than we would
6276 otherwise. In the case that ALLOW_NON_CONSTANT_P is true, it is
6277 actually essential that we look for an assignment-expression.
6278 For example, cp_parser_initializer_clauses uses this function to
6279 determine whether a particular assignment-expression is in fact
6281 expression = cp_parser_assignment_expression (parser, /*cast_p=*/false);
6282 /* Restore the old settings. */
6283 parser->integral_constant_expression_p
6284 = saved_integral_constant_expression_p;
6285 parser->allow_non_integral_constant_expression_p
6286 = saved_allow_non_integral_constant_expression_p;
6287 if (allow_non_constant_p)
6288 *non_constant_p = parser->non_integral_constant_expression_p;
6289 else if (parser->non_integral_constant_expression_p)
6290 expression = error_mark_node;
6291 parser->non_integral_constant_expression_p
6292 = saved_non_integral_constant_expression_p;
6297 /* Parse __builtin_offsetof.
6299 offsetof-expression:
6300 "__builtin_offsetof" "(" type-id "," offsetof-member-designator ")"
6302 offsetof-member-designator:
6304 | offsetof-member-designator "." id-expression
6305 | offsetof-member-designator "[" expression "]" */
6308 cp_parser_builtin_offsetof (cp_parser *parser)
6310 int save_ice_p, save_non_ice_p;
6314 /* We're about to accept non-integral-constant things, but will
6315 definitely yield an integral constant expression. Save and
6316 restore these values around our local parsing. */
6317 save_ice_p = parser->integral_constant_expression_p;
6318 save_non_ice_p = parser->non_integral_constant_expression_p;
6320 /* Consume the "__builtin_offsetof" token. */
6321 cp_lexer_consume_token (parser->lexer);
6322 /* Consume the opening `('. */
6323 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
6324 /* Parse the type-id. */
6325 type = cp_parser_type_id (parser);
6326 /* Look for the `,'. */
6327 cp_parser_require (parser, CPP_COMMA, "`,'");
6329 /* Build the (type *)null that begins the traditional offsetof macro. */
6330 expr = build_static_cast (build_pointer_type (type), null_pointer_node);
6332 /* Parse the offsetof-member-designator. We begin as if we saw "expr->". */
6333 expr = cp_parser_postfix_dot_deref_expression (parser, CPP_DEREF, expr,
6337 cp_token *token = cp_lexer_peek_token (parser->lexer);
6338 switch (token->type)
6340 case CPP_OPEN_SQUARE:
6341 /* offsetof-member-designator "[" expression "]" */
6342 expr = cp_parser_postfix_open_square_expression (parser, expr, true);
6346 /* offsetof-member-designator "." identifier */
6347 cp_lexer_consume_token (parser->lexer);
6348 expr = cp_parser_postfix_dot_deref_expression (parser, CPP_DOT, expr,
6352 case CPP_CLOSE_PAREN:
6353 /* Consume the ")" token. */
6354 cp_lexer_consume_token (parser->lexer);
6358 /* Error. We know the following require will fail, but
6359 that gives the proper error message. */
6360 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
6361 cp_parser_skip_to_closing_parenthesis (parser, true, false, true);
6362 expr = error_mark_node;
6368 /* If we're processing a template, we can't finish the semantics yet.
6369 Otherwise we can fold the entire expression now. */
6370 if (processing_template_decl)
6371 expr = build1 (OFFSETOF_EXPR, size_type_node, expr);
6373 expr = finish_offsetof (expr);
6376 parser->integral_constant_expression_p = save_ice_p;
6377 parser->non_integral_constant_expression_p = save_non_ice_p;
6382 /* Parse a trait expression. */
6385 cp_parser_trait_expr (cp_parser* parser, enum rid keyword)
6388 tree type1, type2 = NULL_TREE;
6389 bool binary = false;
6390 cp_decl_specifier_seq decl_specs;
6394 case RID_HAS_NOTHROW_ASSIGN:
6395 kind = CPTK_HAS_NOTHROW_ASSIGN;
6397 case RID_HAS_NOTHROW_CONSTRUCTOR:
6398 kind = CPTK_HAS_NOTHROW_CONSTRUCTOR;
6400 case RID_HAS_NOTHROW_COPY:
6401 kind = CPTK_HAS_NOTHROW_COPY;
6403 case RID_HAS_TRIVIAL_ASSIGN:
6404 kind = CPTK_HAS_TRIVIAL_ASSIGN;
6406 case RID_HAS_TRIVIAL_CONSTRUCTOR:
6407 kind = CPTK_HAS_TRIVIAL_CONSTRUCTOR;
6409 case RID_HAS_TRIVIAL_COPY:
6410 kind = CPTK_HAS_TRIVIAL_COPY;
6412 case RID_HAS_TRIVIAL_DESTRUCTOR:
6413 kind = CPTK_HAS_TRIVIAL_DESTRUCTOR;
6415 case RID_HAS_VIRTUAL_DESTRUCTOR:
6416 kind = CPTK_HAS_VIRTUAL_DESTRUCTOR;
6418 case RID_IS_ABSTRACT:
6419 kind = CPTK_IS_ABSTRACT;
6421 case RID_IS_BASE_OF:
6422 kind = CPTK_IS_BASE_OF;
6426 kind = CPTK_IS_CLASS;
6428 case RID_IS_CONVERTIBLE_TO:
6429 kind = CPTK_IS_CONVERTIBLE_TO;
6433 kind = CPTK_IS_EMPTY;
6436 kind = CPTK_IS_ENUM;
6441 case RID_IS_POLYMORPHIC:
6442 kind = CPTK_IS_POLYMORPHIC;
6445 kind = CPTK_IS_UNION;
6451 /* Consume the token. */
6452 cp_lexer_consume_token (parser->lexer);
6454 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
6456 type1 = cp_parser_type_id (parser);
6458 /* Build a trivial decl-specifier-seq. */
6459 clear_decl_specs (&decl_specs);
6460 decl_specs.type = type1;
6462 /* Call grokdeclarator to figure out what type this is. */
6463 type1 = grokdeclarator (NULL, &decl_specs, TYPENAME,
6464 /*initialized=*/0, /*attrlist=*/NULL);
6468 cp_parser_require (parser, CPP_COMMA, "`,'");
6470 type2 = cp_parser_type_id (parser);
6472 /* Build a trivial decl-specifier-seq. */
6473 clear_decl_specs (&decl_specs);
6474 decl_specs.type = type2;
6476 /* Call grokdeclarator to figure out what type this is. */
6477 type2 = grokdeclarator (NULL, &decl_specs, TYPENAME,
6478 /*initialized=*/0, /*attrlist=*/NULL);
6481 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
6483 /* Complete the trait expr, which may mean either processing the
6484 static assert now or saving it for template instantiation. */
6485 return finish_trait_expr (kind, type1, type2);
6488 /* Statements [gram.stmt.stmt] */
6490 /* Parse a statement.
6494 expression-statement
6499 declaration-statement
6502 IN_COMPOUND is true when the statement is nested inside a
6503 cp_parser_compound_statement; this matters for certain pragmas.
6505 If IF_P is not NULL, *IF_P is set to indicate whether the statement
6506 is a (possibly labeled) if statement which is not enclosed in braces
6507 and has an else clause. This is used to implement -Wparentheses. */
6510 cp_parser_statement (cp_parser* parser, tree in_statement_expr,
6511 bool in_compound, bool *if_p)
6515 location_t statement_location;
6520 /* There is no statement yet. */
6521 statement = NULL_TREE;
6522 /* Peek at the next token. */
6523 token = cp_lexer_peek_token (parser->lexer);
6524 /* Remember the location of the first token in the statement. */
6525 statement_location = token->location;
6526 /* If this is a keyword, then that will often determine what kind of
6527 statement we have. */
6528 if (token->type == CPP_KEYWORD)
6530 enum rid keyword = token->keyword;
6536 /* Looks like a labeled-statement with a case label.
6537 Parse the label, and then use tail recursion to parse
6539 cp_parser_label_for_labeled_statement (parser);
6544 statement = cp_parser_selection_statement (parser, if_p);
6550 statement = cp_parser_iteration_statement (parser);
6557 statement = cp_parser_jump_statement (parser);
6560 /* Objective-C++ exception-handling constructs. */
6563 case RID_AT_FINALLY:
6564 case RID_AT_SYNCHRONIZED:
6566 statement = cp_parser_objc_statement (parser);
6570 statement = cp_parser_try_block (parser);
6574 /* This must be a namespace alias definition. */
6575 cp_parser_declaration_statement (parser);
6579 /* It might be a keyword like `int' that can start a
6580 declaration-statement. */
6584 else if (token->type == CPP_NAME)
6586 /* If the next token is a `:', then we are looking at a
6587 labeled-statement. */
6588 token = cp_lexer_peek_nth_token (parser->lexer, 2);
6589 if (token->type == CPP_COLON)
6591 /* Looks like a labeled-statement with an ordinary label.
6592 Parse the label, and then use tail recursion to parse
6594 cp_parser_label_for_labeled_statement (parser);
6598 /* Anything that starts with a `{' must be a compound-statement. */
6599 else if (token->type == CPP_OPEN_BRACE)
6600 statement = cp_parser_compound_statement (parser, NULL, false);
6601 /* CPP_PRAGMA is a #pragma inside a function body, which constitutes
6602 a statement all its own. */
6603 else if (token->type == CPP_PRAGMA)
6605 /* Only certain OpenMP pragmas are attached to statements, and thus
6606 are considered statements themselves. All others are not. In
6607 the context of a compound, accept the pragma as a "statement" and
6608 return so that we can check for a close brace. Otherwise we
6609 require a real statement and must go back and read one. */
6611 cp_parser_pragma (parser, pragma_compound);
6612 else if (!cp_parser_pragma (parser, pragma_stmt))
6616 else if (token->type == CPP_EOF)
6618 cp_parser_error (parser, "expected statement");
6622 /* Everything else must be a declaration-statement or an
6623 expression-statement. Try for the declaration-statement
6624 first, unless we are looking at a `;', in which case we know that
6625 we have an expression-statement. */
6628 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
6630 cp_parser_parse_tentatively (parser);
6631 /* Try to parse the declaration-statement. */
6632 cp_parser_declaration_statement (parser);
6633 /* If that worked, we're done. */
6634 if (cp_parser_parse_definitely (parser))
6637 /* Look for an expression-statement instead. */
6638 statement = cp_parser_expression_statement (parser, in_statement_expr);
6641 /* Set the line number for the statement. */
6642 if (statement && STATEMENT_CODE_P (TREE_CODE (statement)))
6643 SET_EXPR_LOCATION (statement, statement_location);
6646 /* Parse the label for a labeled-statement, i.e.
6649 case constant-expression :
6653 case constant-expression ... constant-expression : statement
6655 When a label is parsed without errors, the label is added to the
6656 parse tree by the finish_* functions, so this function doesn't
6657 have to return the label. */
6660 cp_parser_label_for_labeled_statement (cp_parser* parser)
6664 /* The next token should be an identifier. */
6665 token = cp_lexer_peek_token (parser->lexer);
6666 if (token->type != CPP_NAME
6667 && token->type != CPP_KEYWORD)
6669 cp_parser_error (parser, "expected labeled-statement");
6673 switch (token->keyword)
6680 /* Consume the `case' token. */
6681 cp_lexer_consume_token (parser->lexer);
6682 /* Parse the constant-expression. */
6683 expr = cp_parser_constant_expression (parser,
6684 /*allow_non_constant_p=*/false,
6687 ellipsis = cp_lexer_peek_token (parser->lexer);
6688 if (ellipsis->type == CPP_ELLIPSIS)
6690 /* Consume the `...' token. */
6691 cp_lexer_consume_token (parser->lexer);
6693 cp_parser_constant_expression (parser,
6694 /*allow_non_constant_p=*/false,
6696 /* We don't need to emit warnings here, as the common code
6697 will do this for us. */
6700 expr_hi = NULL_TREE;
6702 if (parser->in_switch_statement_p)
6703 finish_case_label (expr, expr_hi);
6705 error ("case label %qE not within a switch statement", expr);
6710 /* Consume the `default' token. */
6711 cp_lexer_consume_token (parser->lexer);
6713 if (parser->in_switch_statement_p)
6714 finish_case_label (NULL_TREE, NULL_TREE);
6716 error ("case label not within a switch statement");
6720 /* Anything else must be an ordinary label. */
6721 finish_label_stmt (cp_parser_identifier (parser));
6725 /* Require the `:' token. */
6726 cp_parser_require (parser, CPP_COLON, "`:'");
6729 /* Parse an expression-statement.
6731 expression-statement:
6734 Returns the new EXPR_STMT -- or NULL_TREE if the expression
6735 statement consists of nothing more than an `;'. IN_STATEMENT_EXPR_P
6736 indicates whether this expression-statement is part of an
6737 expression statement. */
6740 cp_parser_expression_statement (cp_parser* parser, tree in_statement_expr)
6742 tree statement = NULL_TREE;
6744 /* If the next token is a ';', then there is no expression
6746 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
6747 statement = cp_parser_expression (parser, /*cast_p=*/false);
6749 /* Consume the final `;'. */
6750 cp_parser_consume_semicolon_at_end_of_statement (parser);
6752 if (in_statement_expr
6753 && cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
6754 /* This is the final expression statement of a statement
6756 statement = finish_stmt_expr_expr (statement, in_statement_expr);
6758 statement = finish_expr_stmt (statement);
6765 /* Parse a compound-statement.
6768 { statement-seq [opt] }
6770 Returns a tree representing the statement. */
6773 cp_parser_compound_statement (cp_parser *parser, tree in_statement_expr,
6778 /* Consume the `{'. */
6779 if (!cp_parser_require (parser, CPP_OPEN_BRACE, "`{'"))
6780 return error_mark_node;
6781 /* Begin the compound-statement. */
6782 compound_stmt = begin_compound_stmt (in_try ? BCS_TRY_BLOCK : 0);
6783 /* Parse an (optional) statement-seq. */
6784 cp_parser_statement_seq_opt (parser, in_statement_expr);
6785 /* Finish the compound-statement. */
6786 finish_compound_stmt (compound_stmt);
6787 /* Consume the `}'. */
6788 cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'");
6790 return compound_stmt;
6793 /* Parse an (optional) statement-seq.
6797 statement-seq [opt] statement */
6800 cp_parser_statement_seq_opt (cp_parser* parser, tree in_statement_expr)
6802 /* Scan statements until there aren't any more. */
6805 cp_token *token = cp_lexer_peek_token (parser->lexer);
6807 /* If we're looking at a `}', then we've run out of statements. */
6808 if (token->type == CPP_CLOSE_BRACE
6809 || token->type == CPP_EOF
6810 || token->type == CPP_PRAGMA_EOL)
6813 /* If we are in a compound statement and find 'else' then
6814 something went wrong. */
6815 else if (token->type == CPP_KEYWORD && token->keyword == RID_ELSE)
6817 if (parser->in_statement & IN_IF_STMT)
6821 token = cp_lexer_consume_token (parser->lexer);
6822 error ("%<else%> without a previous %<if%>");
6826 /* Parse the statement. */
6827 cp_parser_statement (parser, in_statement_expr, true, NULL);
6831 /* Parse a selection-statement.
6833 selection-statement:
6834 if ( condition ) statement
6835 if ( condition ) statement else statement
6836 switch ( condition ) statement
6838 Returns the new IF_STMT or SWITCH_STMT.
6840 If IF_P is not NULL, *IF_P is set to indicate whether the statement
6841 is a (possibly labeled) if statement which is not enclosed in
6842 braces and has an else clause. This is used to implement
6846 cp_parser_selection_statement (cp_parser* parser, bool *if_p)
6854 /* Peek at the next token. */
6855 token = cp_parser_require (parser, CPP_KEYWORD, "selection-statement");
6857 /* See what kind of keyword it is. */
6858 keyword = token->keyword;
6867 /* Look for the `('. */
6868 if (!cp_parser_require (parser, CPP_OPEN_PAREN, "`('"))
6870 cp_parser_skip_to_end_of_statement (parser);
6871 return error_mark_node;
6874 /* Begin the selection-statement. */
6875 if (keyword == RID_IF)
6876 statement = begin_if_stmt ();
6878 statement = begin_switch_stmt ();
6880 /* Parse the condition. */
6881 condition = cp_parser_condition (parser);
6882 /* Look for the `)'. */
6883 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
6884 cp_parser_skip_to_closing_parenthesis (parser, true, false,
6885 /*consume_paren=*/true);
6887 if (keyword == RID_IF)
6890 unsigned char in_statement;
6892 /* Add the condition. */
6893 finish_if_stmt_cond (condition, statement);
6895 /* Parse the then-clause. */
6896 in_statement = parser->in_statement;
6897 parser->in_statement |= IN_IF_STMT;
6898 cp_parser_implicitly_scoped_statement (parser, &nested_if);
6899 parser->in_statement = in_statement;
6901 finish_then_clause (statement);
6903 /* If the next token is `else', parse the else-clause. */
6904 if (cp_lexer_next_token_is_keyword (parser->lexer,
6907 /* Consume the `else' keyword. */
6908 cp_lexer_consume_token (parser->lexer);
6909 begin_else_clause (statement);
6910 /* Parse the else-clause. */
6911 cp_parser_implicitly_scoped_statement (parser, NULL);
6912 finish_else_clause (statement);
6914 /* If we are currently parsing a then-clause, then
6915 IF_P will not be NULL. We set it to true to
6916 indicate that this if statement has an else clause.
6917 This may trigger the Wparentheses warning below
6918 when we get back up to the parent if statement. */
6924 /* This if statement does not have an else clause. If
6925 NESTED_IF is true, then the then-clause is an if
6926 statement which does have an else clause. We warn
6927 about the potential ambiguity. */
6929 warning (OPT_Wparentheses,
6930 ("%Hsuggest explicit braces "
6931 "to avoid ambiguous %<else%>"),
6932 EXPR_LOCUS (statement));
6935 /* Now we're all done with the if-statement. */
6936 finish_if_stmt (statement);
6940 bool in_switch_statement_p;
6941 unsigned char in_statement;
6943 /* Add the condition. */
6944 finish_switch_cond (condition, statement);
6946 /* Parse the body of the switch-statement. */
6947 in_switch_statement_p = parser->in_switch_statement_p;
6948 in_statement = parser->in_statement;
6949 parser->in_switch_statement_p = true;
6950 parser->in_statement |= IN_SWITCH_STMT;
6951 cp_parser_implicitly_scoped_statement (parser, NULL);
6952 parser->in_switch_statement_p = in_switch_statement_p;
6953 parser->in_statement = in_statement;
6955 /* Now we're all done with the switch-statement. */
6956 finish_switch_stmt (statement);
6964 cp_parser_error (parser, "expected selection-statement");
6965 return error_mark_node;
6969 /* Parse a condition.
6973 type-specifier-seq declarator = assignment-expression
6978 type-specifier-seq declarator asm-specification [opt]
6979 attributes [opt] = assignment-expression
6981 Returns the expression that should be tested. */
6984 cp_parser_condition (cp_parser* parser)
6986 cp_decl_specifier_seq type_specifiers;
6987 const char *saved_message;
6989 /* Try the declaration first. */
6990 cp_parser_parse_tentatively (parser);
6991 /* New types are not allowed in the type-specifier-seq for a
6993 saved_message = parser->type_definition_forbidden_message;
6994 parser->type_definition_forbidden_message
6995 = "types may not be defined in conditions";
6996 /* Parse the type-specifier-seq. */
6997 cp_parser_type_specifier_seq (parser, /*is_condition==*/true,
6999 /* Restore the saved message. */
7000 parser->type_definition_forbidden_message = saved_message;
7001 /* If all is well, we might be looking at a declaration. */
7002 if (!cp_parser_error_occurred (parser))
7005 tree asm_specification;
7007 cp_declarator *declarator;
7008 tree initializer = NULL_TREE;
7010 /* Parse the declarator. */
7011 declarator = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
7012 /*ctor_dtor_or_conv_p=*/NULL,
7013 /*parenthesized_p=*/NULL,
7014 /*member_p=*/false);
7015 /* Parse the attributes. */
7016 attributes = cp_parser_attributes_opt (parser);
7017 /* Parse the asm-specification. */
7018 asm_specification = cp_parser_asm_specification_opt (parser);
7019 /* If the next token is not an `=', then we might still be
7020 looking at an expression. For example:
7024 looks like a decl-specifier-seq and a declarator -- but then
7025 there is no `=', so this is an expression. */
7026 cp_parser_require (parser, CPP_EQ, "`='");
7027 /* If we did see an `=', then we are looking at a declaration
7029 if (cp_parser_parse_definitely (parser))
7032 bool non_constant_p;
7034 /* Create the declaration. */
7035 decl = start_decl (declarator, &type_specifiers,
7036 /*initialized_p=*/true,
7037 attributes, /*prefix_attributes=*/NULL_TREE,
7039 /* Parse the assignment-expression. */
7041 = cp_parser_constant_expression (parser,
7042 /*allow_non_constant_p=*/true,
7044 if (!non_constant_p)
7045 initializer = fold_non_dependent_expr (initializer);
7047 /* Process the initializer. */
7048 cp_finish_decl (decl,
7049 initializer, !non_constant_p,
7051 LOOKUP_ONLYCONVERTING);
7054 pop_scope (pushed_scope);
7056 return convert_from_reference (decl);
7059 /* If we didn't even get past the declarator successfully, we are
7060 definitely not looking at a declaration. */
7062 cp_parser_abort_tentative_parse (parser);
7064 /* Otherwise, we are looking at an expression. */
7065 return cp_parser_expression (parser, /*cast_p=*/false);
7068 /* We check for a ) immediately followed by ; with no whitespacing
7069 between. This is used to issue a warning for:
7077 as the semicolon is probably extraneous.
7079 On parse errors, the next token might not be a ), so do nothing in
7083 check_empty_body (cp_parser* parser, const char* type)
7086 cp_token *close_paren;
7087 expanded_location close_loc;
7088 expanded_location semi_loc;
7090 close_paren = cp_lexer_peek_token (parser->lexer);
7091 if (close_paren->type != CPP_CLOSE_PAREN)
7094 close_loc = expand_location (close_paren->location);
7095 token = cp_lexer_peek_nth_token (parser->lexer, 2);
7097 if (token->type != CPP_SEMICOLON
7098 || (token->flags & PREV_WHITE))
7101 semi_loc = expand_location (token->location);
7102 if (close_loc.line == semi_loc.line
7103 #ifdef USE_MAPPED_LOCATION
7104 && close_loc.column+1 == semi_loc.column
7107 warning (OPT_Wempty_body,
7108 "suggest a space before %<;%> or explicit braces around empty "
7109 "body in %<%s%> statement",
7113 /* Parse an iteration-statement.
7115 iteration-statement:
7116 while ( condition ) statement
7117 do statement while ( expression ) ;
7118 for ( for-init-statement condition [opt] ; expression [opt] )
7121 Returns the new WHILE_STMT, DO_STMT, or FOR_STMT. */
7124 cp_parser_iteration_statement (cp_parser* parser)
7129 unsigned char in_statement;
7131 /* Peek at the next token. */
7132 token = cp_parser_require (parser, CPP_KEYWORD, "iteration-statement");
7134 return error_mark_node;
7136 /* Remember whether or not we are already within an iteration
7138 in_statement = parser->in_statement;
7140 /* See what kind of keyword it is. */
7141 keyword = token->keyword;
7148 /* Begin the while-statement. */
7149 statement = begin_while_stmt ();
7150 /* Look for the `('. */
7151 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
7152 /* Parse the condition. */
7153 condition = cp_parser_condition (parser);
7154 finish_while_stmt_cond (condition, statement);
7155 check_empty_body (parser, "while");
7156 /* Look for the `)'. */
7157 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
7158 /* Parse the dependent statement. */
7159 parser->in_statement = IN_ITERATION_STMT;
7160 cp_parser_already_scoped_statement (parser);
7161 parser->in_statement = in_statement;
7162 /* We're done with the while-statement. */
7163 finish_while_stmt (statement);
7171 /* Begin the do-statement. */
7172 statement = begin_do_stmt ();
7173 /* Parse the body of the do-statement. */
7174 parser->in_statement = IN_ITERATION_STMT;
7175 cp_parser_implicitly_scoped_statement (parser, NULL);
7176 parser->in_statement = in_statement;
7177 finish_do_body (statement);
7178 /* Look for the `while' keyword. */
7179 cp_parser_require_keyword (parser, RID_WHILE, "`while'");
7180 /* Look for the `('. */
7181 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
7182 /* Parse the expression. */
7183 expression = cp_parser_expression (parser, /*cast_p=*/false);
7184 /* We're done with the do-statement. */
7185 finish_do_stmt (expression, statement);
7186 /* Look for the `)'. */
7187 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
7188 /* Look for the `;'. */
7189 cp_parser_require (parser, CPP_SEMICOLON, "`;'");
7195 tree condition = NULL_TREE;
7196 tree expression = NULL_TREE;
7198 /* Begin the for-statement. */
7199 statement = begin_for_stmt ();
7200 /* Look for the `('. */
7201 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
7202 /* Parse the initialization. */
7203 cp_parser_for_init_statement (parser);
7204 finish_for_init_stmt (statement);
7206 /* If there's a condition, process it. */
7207 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
7208 condition = cp_parser_condition (parser);
7209 finish_for_cond (condition, statement);
7210 /* Look for the `;'. */
7211 cp_parser_require (parser, CPP_SEMICOLON, "`;'");
7213 /* If there's an expression, process it. */
7214 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN))
7215 expression = cp_parser_expression (parser, /*cast_p=*/false);
7216 finish_for_expr (expression, statement);
7217 check_empty_body (parser, "for");
7218 /* Look for the `)'. */
7219 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
7221 /* Parse the body of the for-statement. */
7222 parser->in_statement = IN_ITERATION_STMT;
7223 cp_parser_already_scoped_statement (parser);
7224 parser->in_statement = in_statement;
7226 /* We're done with the for-statement. */
7227 finish_for_stmt (statement);
7232 cp_parser_error (parser, "expected iteration-statement");
7233 statement = error_mark_node;
7240 /* Parse a for-init-statement.
7243 expression-statement
7244 simple-declaration */
7247 cp_parser_for_init_statement (cp_parser* parser)
7249 /* If the next token is a `;', then we have an empty
7250 expression-statement. Grammatically, this is also a
7251 simple-declaration, but an invalid one, because it does not
7252 declare anything. Therefore, if we did not handle this case
7253 specially, we would issue an error message about an invalid
7255 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
7257 /* We're going to speculatively look for a declaration, falling back
7258 to an expression, if necessary. */
7259 cp_parser_parse_tentatively (parser);
7260 /* Parse the declaration. */
7261 cp_parser_simple_declaration (parser,
7262 /*function_definition_allowed_p=*/false);
7263 /* If the tentative parse failed, then we shall need to look for an
7264 expression-statement. */
7265 if (cp_parser_parse_definitely (parser))
7269 cp_parser_expression_statement (parser, false);
7272 /* Parse a jump-statement.
7277 return expression [opt] ;
7285 Returns the new BREAK_STMT, CONTINUE_STMT, RETURN_EXPR, or GOTO_EXPR. */
7288 cp_parser_jump_statement (cp_parser* parser)
7290 tree statement = error_mark_node;
7293 unsigned char in_statement;
7295 /* Peek at the next token. */
7296 token = cp_parser_require (parser, CPP_KEYWORD, "jump-statement");
7298 return error_mark_node;
7300 /* See what kind of keyword it is. */
7301 keyword = token->keyword;
7305 in_statement = parser->in_statement & ~IN_IF_STMT;
7306 switch (in_statement)
7309 error ("break statement not within loop or switch");
7312 gcc_assert ((in_statement & IN_SWITCH_STMT)
7313 || in_statement == IN_ITERATION_STMT);
7314 statement = finish_break_stmt ();
7317 error ("invalid exit from OpenMP structured block");
7320 error ("break statement used with OpenMP for loop");
7323 cp_parser_require (parser, CPP_SEMICOLON, "%<;%>");
7327 switch (parser->in_statement & ~(IN_SWITCH_STMT | IN_IF_STMT))
7330 error ("continue statement not within a loop");
7332 case IN_ITERATION_STMT:
7334 statement = finish_continue_stmt ();
7337 error ("invalid exit from OpenMP structured block");
7342 cp_parser_require (parser, CPP_SEMICOLON, "%<;%>");
7349 /* If the next token is a `;', then there is no
7351 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
7352 expr = cp_parser_expression (parser, /*cast_p=*/false);
7355 /* Build the return-statement. */
7356 statement = finish_return_stmt (expr);
7357 /* Look for the final `;'. */
7358 cp_parser_require (parser, CPP_SEMICOLON, "%<;%>");
7363 /* Create the goto-statement. */
7364 if (cp_lexer_next_token_is (parser->lexer, CPP_MULT))
7366 /* Issue a warning about this use of a GNU extension. */
7368 pedwarn ("ISO C++ forbids computed gotos");
7369 /* Consume the '*' token. */
7370 cp_lexer_consume_token (parser->lexer);
7371 /* Parse the dependent expression. */
7372 finish_goto_stmt (cp_parser_expression (parser, /*cast_p=*/false));
7375 finish_goto_stmt (cp_parser_identifier (parser));
7376 /* Look for the final `;'. */
7377 cp_parser_require (parser, CPP_SEMICOLON, "%<;%>");
7381 cp_parser_error (parser, "expected jump-statement");
7388 /* Parse a declaration-statement.
7390 declaration-statement:
7391 block-declaration */
7394 cp_parser_declaration_statement (cp_parser* parser)
7398 /* Get the high-water mark for the DECLARATOR_OBSTACK. */
7399 p = obstack_alloc (&declarator_obstack, 0);
7401 /* Parse the block-declaration. */
7402 cp_parser_block_declaration (parser, /*statement_p=*/true);
7404 /* Free any declarators allocated. */
7405 obstack_free (&declarator_obstack, p);
7407 /* Finish off the statement. */
7411 /* Some dependent statements (like `if (cond) statement'), are
7412 implicitly in their own scope. In other words, if the statement is
7413 a single statement (as opposed to a compound-statement), it is
7414 none-the-less treated as if it were enclosed in braces. Any
7415 declarations appearing in the dependent statement are out of scope
7416 after control passes that point. This function parses a statement,
7417 but ensures that is in its own scope, even if it is not a
7420 If IF_P is not NULL, *IF_P is set to indicate whether the statement
7421 is a (possibly labeled) if statement which is not enclosed in
7422 braces and has an else clause. This is used to implement
7425 Returns the new statement. */
7428 cp_parser_implicitly_scoped_statement (cp_parser* parser, bool *if_p)
7435 /* Mark if () ; with a special NOP_EXPR. */
7436 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
7438 cp_lexer_consume_token (parser->lexer);
7439 statement = add_stmt (build_empty_stmt ());
7441 /* if a compound is opened, we simply parse the statement directly. */
7442 else if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
7443 statement = cp_parser_compound_statement (parser, NULL, false);
7444 /* If the token is not a `{', then we must take special action. */
7447 /* Create a compound-statement. */
7448 statement = begin_compound_stmt (0);
7449 /* Parse the dependent-statement. */
7450 cp_parser_statement (parser, NULL_TREE, false, if_p);
7451 /* Finish the dummy compound-statement. */
7452 finish_compound_stmt (statement);
7455 /* Return the statement. */
7459 /* For some dependent statements (like `while (cond) statement'), we
7460 have already created a scope. Therefore, even if the dependent
7461 statement is a compound-statement, we do not want to create another
7465 cp_parser_already_scoped_statement (cp_parser* parser)
7467 /* If the token is a `{', then we must take special action. */
7468 if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE))
7469 cp_parser_statement (parser, NULL_TREE, false, NULL);
7472 /* Avoid calling cp_parser_compound_statement, so that we
7473 don't create a new scope. Do everything else by hand. */
7474 cp_parser_require (parser, CPP_OPEN_BRACE, "`{'");
7475 cp_parser_statement_seq_opt (parser, NULL_TREE);
7476 cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'");
7480 /* Declarations [gram.dcl.dcl] */
7482 /* Parse an optional declaration-sequence.
7486 declaration-seq declaration */
7489 cp_parser_declaration_seq_opt (cp_parser* parser)
7495 token = cp_lexer_peek_token (parser->lexer);
7497 if (token->type == CPP_CLOSE_BRACE
7498 || token->type == CPP_EOF
7499 || token->type == CPP_PRAGMA_EOL)
7502 if (token->type == CPP_SEMICOLON)
7504 /* A declaration consisting of a single semicolon is
7505 invalid. Allow it unless we're being pedantic. */
7506 cp_lexer_consume_token (parser->lexer);
7507 if (pedantic && !in_system_header)
7508 pedwarn ("extra %<;%>");
7512 /* If we're entering or exiting a region that's implicitly
7513 extern "C", modify the lang context appropriately. */
7514 if (!parser->implicit_extern_c && token->implicit_extern_c)
7516 push_lang_context (lang_name_c);
7517 parser->implicit_extern_c = true;
7519 else if (parser->implicit_extern_c && !token->implicit_extern_c)
7521 pop_lang_context ();
7522 parser->implicit_extern_c = false;
7525 if (token->type == CPP_PRAGMA)
7527 /* A top-level declaration can consist solely of a #pragma.
7528 A nested declaration cannot, so this is done here and not
7529 in cp_parser_declaration. (A #pragma at block scope is
7530 handled in cp_parser_statement.) */
7531 cp_parser_pragma (parser, pragma_external);
7535 /* Parse the declaration itself. */
7536 cp_parser_declaration (parser);
7540 /* Parse a declaration.
7545 template-declaration
7546 explicit-instantiation
7547 explicit-specialization
7548 linkage-specification
7549 namespace-definition
7554 __extension__ declaration */
7557 cp_parser_declaration (cp_parser* parser)
7564 /* Check for the `__extension__' keyword. */
7565 if (cp_parser_extension_opt (parser, &saved_pedantic))
7567 /* Parse the qualified declaration. */
7568 cp_parser_declaration (parser);
7569 /* Restore the PEDANTIC flag. */
7570 pedantic = saved_pedantic;
7575 /* Try to figure out what kind of declaration is present. */
7576 token1 = *cp_lexer_peek_token (parser->lexer);
7578 if (token1.type != CPP_EOF)
7579 token2 = *cp_lexer_peek_nth_token (parser->lexer, 2);
7582 token2.type = CPP_EOF;
7583 token2.keyword = RID_MAX;
7586 /* Get the high-water mark for the DECLARATOR_OBSTACK. */
7587 p = obstack_alloc (&declarator_obstack, 0);
7589 /* If the next token is `extern' and the following token is a string
7590 literal, then we have a linkage specification. */
7591 if (token1.keyword == RID_EXTERN
7592 && cp_parser_is_string_literal (&token2))
7593 cp_parser_linkage_specification (parser);
7594 /* If the next token is `template', then we have either a template
7595 declaration, an explicit instantiation, or an explicit
7597 else if (token1.keyword == RID_TEMPLATE)
7599 /* `template <>' indicates a template specialization. */
7600 if (token2.type == CPP_LESS
7601 && cp_lexer_peek_nth_token (parser->lexer, 3)->type == CPP_GREATER)
7602 cp_parser_explicit_specialization (parser);
7603 /* `template <' indicates a template declaration. */
7604 else if (token2.type == CPP_LESS)
7605 cp_parser_template_declaration (parser, /*member_p=*/false);
7606 /* Anything else must be an explicit instantiation. */
7608 cp_parser_explicit_instantiation (parser);
7610 /* If the next token is `export', then we have a template
7612 else if (token1.keyword == RID_EXPORT)
7613 cp_parser_template_declaration (parser, /*member_p=*/false);
7614 /* If the next token is `extern', 'static' or 'inline' and the one
7615 after that is `template', we have a GNU extended explicit
7616 instantiation directive. */
7617 else if (cp_parser_allow_gnu_extensions_p (parser)
7618 && (token1.keyword == RID_EXTERN
7619 || token1.keyword == RID_STATIC
7620 || token1.keyword == RID_INLINE)
7621 && token2.keyword == RID_TEMPLATE)
7622 cp_parser_explicit_instantiation (parser);
7623 /* If the next token is `namespace', check for a named or unnamed
7624 namespace definition. */
7625 else if (token1.keyword == RID_NAMESPACE
7626 && (/* A named namespace definition. */
7627 (token2.type == CPP_NAME
7628 && (cp_lexer_peek_nth_token (parser->lexer, 3)->type
7630 /* An unnamed namespace definition. */
7631 || token2.type == CPP_OPEN_BRACE
7632 || token2.keyword == RID_ATTRIBUTE))
7633 cp_parser_namespace_definition (parser);
7634 /* Objective-C++ declaration/definition. */
7635 else if (c_dialect_objc () && OBJC_IS_AT_KEYWORD (token1.keyword))
7636 cp_parser_objc_declaration (parser);
7637 /* We must have either a block declaration or a function
7640 /* Try to parse a block-declaration, or a function-definition. */
7641 cp_parser_block_declaration (parser, /*statement_p=*/false);
7643 /* Free any declarators allocated. */
7644 obstack_free (&declarator_obstack, p);
7647 /* Parse a block-declaration.
7652 namespace-alias-definition
7659 __extension__ block-declaration
7665 static_assert-declaration
7667 If STATEMENT_P is TRUE, then this block-declaration is occurring as
7668 part of a declaration-statement. */
7671 cp_parser_block_declaration (cp_parser *parser,
7677 /* Check for the `__extension__' keyword. */
7678 if (cp_parser_extension_opt (parser, &saved_pedantic))
7680 /* Parse the qualified declaration. */
7681 cp_parser_block_declaration (parser, statement_p);
7682 /* Restore the PEDANTIC flag. */
7683 pedantic = saved_pedantic;
7688 /* Peek at the next token to figure out which kind of declaration is
7690 token1 = cp_lexer_peek_token (parser->lexer);
7692 /* If the next keyword is `asm', we have an asm-definition. */
7693 if (token1->keyword == RID_ASM)
7696 cp_parser_commit_to_tentative_parse (parser);
7697 cp_parser_asm_definition (parser);
7699 /* If the next keyword is `namespace', we have a
7700 namespace-alias-definition. */
7701 else if (token1->keyword == RID_NAMESPACE)
7702 cp_parser_namespace_alias_definition (parser);
7703 /* If the next keyword is `using', we have either a
7704 using-declaration or a using-directive. */
7705 else if (token1->keyword == RID_USING)
7710 cp_parser_commit_to_tentative_parse (parser);
7711 /* If the token after `using' is `namespace', then we have a
7713 token2 = cp_lexer_peek_nth_token (parser->lexer, 2);
7714 if (token2->keyword == RID_NAMESPACE)
7715 cp_parser_using_directive (parser);
7716 /* Otherwise, it's a using-declaration. */
7718 cp_parser_using_declaration (parser,
7719 /*access_declaration_p=*/false);
7721 /* If the next keyword is `__label__' we have a label declaration. */
7722 else if (token1->keyword == RID_LABEL)
7725 cp_parser_commit_to_tentative_parse (parser);
7726 cp_parser_label_declaration (parser);
7728 /* If the next token is `static_assert' we have a static assertion. */
7729 else if (token1->keyword == RID_STATIC_ASSERT)
7730 cp_parser_static_assert (parser, /*member_p=*/false);
7731 /* Anything else must be a simple-declaration. */
7733 cp_parser_simple_declaration (parser, !statement_p);
7736 /* Parse a simple-declaration.
7739 decl-specifier-seq [opt] init-declarator-list [opt] ;
7741 init-declarator-list:
7743 init-declarator-list , init-declarator
7745 If FUNCTION_DEFINITION_ALLOWED_P is TRUE, then we also recognize a
7746 function-definition as a simple-declaration. */
7749 cp_parser_simple_declaration (cp_parser* parser,
7750 bool function_definition_allowed_p)
7752 cp_decl_specifier_seq decl_specifiers;
7753 int declares_class_or_enum;
7754 bool saw_declarator;
7756 /* Defer access checks until we know what is being declared; the
7757 checks for names appearing in the decl-specifier-seq should be
7758 done as if we were in the scope of the thing being declared. */
7759 push_deferring_access_checks (dk_deferred);
7761 /* Parse the decl-specifier-seq. We have to keep track of whether
7762 or not the decl-specifier-seq declares a named class or
7763 enumeration type, since that is the only case in which the
7764 init-declarator-list is allowed to be empty.
7768 In a simple-declaration, the optional init-declarator-list can be
7769 omitted only when declaring a class or enumeration, that is when
7770 the decl-specifier-seq contains either a class-specifier, an
7771 elaborated-type-specifier, or an enum-specifier. */
7772 cp_parser_decl_specifier_seq (parser,
7773 CP_PARSER_FLAGS_OPTIONAL,
7775 &declares_class_or_enum);
7776 /* We no longer need to defer access checks. */
7777 stop_deferring_access_checks ();
7779 /* In a block scope, a valid declaration must always have a
7780 decl-specifier-seq. By not trying to parse declarators, we can
7781 resolve the declaration/expression ambiguity more quickly. */
7782 if (!function_definition_allowed_p
7783 && !decl_specifiers.any_specifiers_p)
7785 cp_parser_error (parser, "expected declaration");
7789 /* If the next two tokens are both identifiers, the code is
7790 erroneous. The usual cause of this situation is code like:
7794 where "T" should name a type -- but does not. */
7795 if (!decl_specifiers.type
7796 && cp_parser_parse_and_diagnose_invalid_type_name (parser))
7798 /* If parsing tentatively, we should commit; we really are
7799 looking at a declaration. */
7800 cp_parser_commit_to_tentative_parse (parser);
7805 /* If we have seen at least one decl-specifier, and the next token
7806 is not a parenthesis, then we must be looking at a declaration.
7807 (After "int (" we might be looking at a functional cast.) */
7808 if (decl_specifiers.any_specifiers_p
7809 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_PAREN))
7810 cp_parser_commit_to_tentative_parse (parser);
7812 /* Keep going until we hit the `;' at the end of the simple
7814 saw_declarator = false;
7815 while (cp_lexer_next_token_is_not (parser->lexer,
7819 bool function_definition_p;
7824 /* If we are processing next declarator, coma is expected */
7825 token = cp_lexer_peek_token (parser->lexer);
7826 gcc_assert (token->type == CPP_COMMA);
7827 cp_lexer_consume_token (parser->lexer);
7830 saw_declarator = true;
7832 /* Parse the init-declarator. */
7833 decl = cp_parser_init_declarator (parser, &decl_specifiers,
7835 function_definition_allowed_p,
7837 declares_class_or_enum,
7838 &function_definition_p);
7839 /* If an error occurred while parsing tentatively, exit quickly.
7840 (That usually happens when in the body of a function; each
7841 statement is treated as a declaration-statement until proven
7843 if (cp_parser_error_occurred (parser))
7845 /* Handle function definitions specially. */
7846 if (function_definition_p)
7848 /* If the next token is a `,', then we are probably
7849 processing something like:
7853 which is erroneous. */
7854 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
7855 error ("mixing declarations and function-definitions is forbidden");
7856 /* Otherwise, we're done with the list of declarators. */
7859 pop_deferring_access_checks ();
7863 /* The next token should be either a `,' or a `;'. */
7864 token = cp_lexer_peek_token (parser->lexer);
7865 /* If it's a `,', there are more declarators to come. */
7866 if (token->type == CPP_COMMA)
7867 /* will be consumed next time around */;
7868 /* If it's a `;', we are done. */
7869 else if (token->type == CPP_SEMICOLON)
7871 /* Anything else is an error. */
7874 /* If we have already issued an error message we don't need
7875 to issue another one. */
7876 if (decl != error_mark_node
7877 || cp_parser_uncommitted_to_tentative_parse_p (parser))
7878 cp_parser_error (parser, "expected %<,%> or %<;%>");
7879 /* Skip tokens until we reach the end of the statement. */
7880 cp_parser_skip_to_end_of_statement (parser);
7881 /* If the next token is now a `;', consume it. */
7882 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
7883 cp_lexer_consume_token (parser->lexer);
7886 /* After the first time around, a function-definition is not
7887 allowed -- even if it was OK at first. For example:
7892 function_definition_allowed_p = false;
7895 /* Issue an error message if no declarators are present, and the
7896 decl-specifier-seq does not itself declare a class or
7898 if (!saw_declarator)
7900 if (cp_parser_declares_only_class_p (parser))
7901 shadow_tag (&decl_specifiers);
7902 /* Perform any deferred access checks. */
7903 perform_deferred_access_checks ();
7906 /* Consume the `;'. */
7907 cp_parser_require (parser, CPP_SEMICOLON, "`;'");
7910 pop_deferring_access_checks ();
7913 /* Parse a decl-specifier-seq.
7916 decl-specifier-seq [opt] decl-specifier
7919 storage-class-specifier
7930 Set *DECL_SPECS to a representation of the decl-specifier-seq.
7932 The parser flags FLAGS is used to control type-specifier parsing.
7934 *DECLARES_CLASS_OR_ENUM is set to the bitwise or of the following
7937 1: one of the decl-specifiers is an elaborated-type-specifier
7938 (i.e., a type declaration)
7939 2: one of the decl-specifiers is an enum-specifier or a
7940 class-specifier (i.e., a type definition)
7945 cp_parser_decl_specifier_seq (cp_parser* parser,
7946 cp_parser_flags flags,
7947 cp_decl_specifier_seq *decl_specs,
7948 int* declares_class_or_enum)
7950 bool constructor_possible_p = !parser->in_declarator_p;
7952 /* Clear DECL_SPECS. */
7953 clear_decl_specs (decl_specs);
7955 /* Assume no class or enumeration type is declared. */
7956 *declares_class_or_enum = 0;
7958 /* Keep reading specifiers until there are no more to read. */
7962 bool found_decl_spec;
7965 /* Peek at the next token. */
7966 token = cp_lexer_peek_token (parser->lexer);
7967 /* Handle attributes. */
7968 if (token->keyword == RID_ATTRIBUTE)
7970 /* Parse the attributes. */
7971 decl_specs->attributes
7972 = chainon (decl_specs->attributes,
7973 cp_parser_attributes_opt (parser));
7976 /* Assume we will find a decl-specifier keyword. */
7977 found_decl_spec = true;
7978 /* If the next token is an appropriate keyword, we can simply
7979 add it to the list. */
7980 switch (token->keyword)
7985 if (!at_class_scope_p ())
7987 error ("%<friend%> used outside of class");
7988 cp_lexer_purge_token (parser->lexer);
7992 ++decl_specs->specs[(int) ds_friend];
7993 /* Consume the token. */
7994 cp_lexer_consume_token (parser->lexer);
7998 /* function-specifier:
8005 cp_parser_function_specifier_opt (parser, decl_specs);
8011 ++decl_specs->specs[(int) ds_typedef];
8012 /* Consume the token. */
8013 cp_lexer_consume_token (parser->lexer);
8014 /* A constructor declarator cannot appear in a typedef. */
8015 constructor_possible_p = false;
8016 /* The "typedef" keyword can only occur in a declaration; we
8017 may as well commit at this point. */
8018 cp_parser_commit_to_tentative_parse (parser);
8020 if (decl_specs->storage_class != sc_none)
8021 decl_specs->conflicting_specifiers_p = true;
8024 /* storage-class-specifier:
8038 /* Consume the token. */
8039 cp_lexer_consume_token (parser->lexer);
8040 cp_parser_set_storage_class (parser, decl_specs, token->keyword);
8043 /* Consume the token. */
8044 cp_lexer_consume_token (parser->lexer);
8045 ++decl_specs->specs[(int) ds_thread];
8049 /* We did not yet find a decl-specifier yet. */
8050 found_decl_spec = false;
8054 /* Constructors are a special case. The `S' in `S()' is not a
8055 decl-specifier; it is the beginning of the declarator. */
8058 && constructor_possible_p
8059 && (cp_parser_constructor_declarator_p
8060 (parser, decl_specs->specs[(int) ds_friend] != 0)));
8062 /* If we don't have a DECL_SPEC yet, then we must be looking at
8063 a type-specifier. */
8064 if (!found_decl_spec && !constructor_p)
8066 int decl_spec_declares_class_or_enum;
8067 bool is_cv_qualifier;
8071 = cp_parser_type_specifier (parser, flags,
8073 /*is_declaration=*/true,
8074 &decl_spec_declares_class_or_enum,
8077 *declares_class_or_enum |= decl_spec_declares_class_or_enum;
8079 /* If this type-specifier referenced a user-defined type
8080 (a typedef, class-name, etc.), then we can't allow any
8081 more such type-specifiers henceforth.
8085 The longest sequence of decl-specifiers that could
8086 possibly be a type name is taken as the
8087 decl-specifier-seq of a declaration. The sequence shall
8088 be self-consistent as described below.
8092 As a general rule, at most one type-specifier is allowed
8093 in the complete decl-specifier-seq of a declaration. The
8094 only exceptions are the following:
8096 -- const or volatile can be combined with any other
8099 -- signed or unsigned can be combined with char, long,
8107 void g (const int Pc);
8109 Here, Pc is *not* part of the decl-specifier seq; it's
8110 the declarator. Therefore, once we see a type-specifier
8111 (other than a cv-qualifier), we forbid any additional
8112 user-defined types. We *do* still allow things like `int
8113 int' to be considered a decl-specifier-seq, and issue the
8114 error message later. */
8115 if (type_spec && !is_cv_qualifier)
8116 flags |= CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES;
8117 /* A constructor declarator cannot follow a type-specifier. */
8120 constructor_possible_p = false;
8121 found_decl_spec = true;
8125 /* If we still do not have a DECL_SPEC, then there are no more
8127 if (!found_decl_spec)
8130 decl_specs->any_specifiers_p = true;
8131 /* After we see one decl-specifier, further decl-specifiers are
8133 flags |= CP_PARSER_FLAGS_OPTIONAL;
8136 cp_parser_check_decl_spec (decl_specs);
8138 /* Don't allow a friend specifier with a class definition. */
8139 if (decl_specs->specs[(int) ds_friend] != 0
8140 && (*declares_class_or_enum & 2))
8141 error ("class definition may not be declared a friend");
8144 /* Parse an (optional) storage-class-specifier.
8146 storage-class-specifier:
8155 storage-class-specifier:
8158 Returns an IDENTIFIER_NODE corresponding to the keyword used. */
8161 cp_parser_storage_class_specifier_opt (cp_parser* parser)
8163 switch (cp_lexer_peek_token (parser->lexer)->keyword)
8171 /* Consume the token. */
8172 return cp_lexer_consume_token (parser->lexer)->u.value;
8179 /* Parse an (optional) function-specifier.
8186 Returns an IDENTIFIER_NODE corresponding to the keyword used.
8187 Updates DECL_SPECS, if it is non-NULL. */
8190 cp_parser_function_specifier_opt (cp_parser* parser,
8191 cp_decl_specifier_seq *decl_specs)
8193 switch (cp_lexer_peek_token (parser->lexer)->keyword)
8197 ++decl_specs->specs[(int) ds_inline];
8201 /* 14.5.2.3 [temp.mem]
8203 A member function template shall not be virtual. */
8204 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
8205 error ("templates may not be %<virtual%>");
8206 else if (decl_specs)
8207 ++decl_specs->specs[(int) ds_virtual];
8212 ++decl_specs->specs[(int) ds_explicit];
8219 /* Consume the token. */
8220 return cp_lexer_consume_token (parser->lexer)->u.value;
8223 /* Parse a linkage-specification.
8225 linkage-specification:
8226 extern string-literal { declaration-seq [opt] }
8227 extern string-literal declaration */
8230 cp_parser_linkage_specification (cp_parser* parser)
8234 /* Look for the `extern' keyword. */
8235 cp_parser_require_keyword (parser, RID_EXTERN, "`extern'");
8237 /* Look for the string-literal. */
8238 linkage = cp_parser_string_literal (parser, false, false);
8240 /* Transform the literal into an identifier. If the literal is a
8241 wide-character string, or contains embedded NULs, then we can't
8242 handle it as the user wants. */
8243 if (strlen (TREE_STRING_POINTER (linkage))
8244 != (size_t) (TREE_STRING_LENGTH (linkage) - 1))
8246 cp_parser_error (parser, "invalid linkage-specification");
8247 /* Assume C++ linkage. */
8248 linkage = lang_name_cplusplus;
8251 linkage = get_identifier (TREE_STRING_POINTER (linkage));
8253 /* We're now using the new linkage. */
8254 push_lang_context (linkage);
8256 /* If the next token is a `{', then we're using the first
8258 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
8260 /* Consume the `{' token. */
8261 cp_lexer_consume_token (parser->lexer);
8262 /* Parse the declarations. */
8263 cp_parser_declaration_seq_opt (parser);
8264 /* Look for the closing `}'. */
8265 cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'");
8267 /* Otherwise, there's just one declaration. */
8270 bool saved_in_unbraced_linkage_specification_p;
8272 saved_in_unbraced_linkage_specification_p
8273 = parser->in_unbraced_linkage_specification_p;
8274 parser->in_unbraced_linkage_specification_p = true;
8275 cp_parser_declaration (parser);
8276 parser->in_unbraced_linkage_specification_p
8277 = saved_in_unbraced_linkage_specification_p;
8280 /* We're done with the linkage-specification. */
8281 pop_lang_context ();
8284 /* Parse a static_assert-declaration.
8286 static_assert-declaration:
8287 static_assert ( constant-expression , string-literal ) ;
8289 If MEMBER_P, this static_assert is a class member. */
8292 cp_parser_static_assert(cp_parser *parser, bool member_p)
8297 location_t saved_loc;
8299 /* Peek at the `static_assert' token so we can keep track of exactly
8300 where the static assertion started. */
8301 token = cp_lexer_peek_token (parser->lexer);
8302 saved_loc = token->location;
8304 /* Look for the `static_assert' keyword. */
8305 if (!cp_parser_require_keyword (parser, RID_STATIC_ASSERT,
8309 /* We know we are in a static assertion; commit to any tentative
8311 if (cp_parser_parsing_tentatively (parser))
8312 cp_parser_commit_to_tentative_parse (parser);
8314 /* Parse the `(' starting the static assertion condition. */
8315 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
8317 /* Parse the constant-expression. */
8319 cp_parser_constant_expression (parser,
8320 /*allow_non_constant_p=*/false,
8321 /*non_constant_p=*/NULL);
8323 /* Parse the separating `,'. */
8324 cp_parser_require (parser, CPP_COMMA, "`,'");
8326 /* Parse the string-literal message. */
8327 message = cp_parser_string_literal (parser,
8328 /*translate=*/false,
8331 /* A `)' completes the static assertion. */
8332 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
8333 cp_parser_skip_to_closing_parenthesis (parser,
8334 /*recovering=*/true,
8336 /*consume_paren=*/true);
8338 /* A semicolon terminates the declaration. */
8339 cp_parser_require (parser, CPP_SEMICOLON, "`;'");
8341 /* Complete the static assertion, which may mean either processing
8342 the static assert now or saving it for template instantiation. */
8343 finish_static_assert (condition, message, saved_loc, member_p);
8346 /* Special member functions [gram.special] */
8348 /* Parse a conversion-function-id.
8350 conversion-function-id:
8351 operator conversion-type-id
8353 Returns an IDENTIFIER_NODE representing the operator. */
8356 cp_parser_conversion_function_id (cp_parser* parser)
8360 tree saved_qualifying_scope;
8361 tree saved_object_scope;
8362 tree pushed_scope = NULL_TREE;
8364 /* Look for the `operator' token. */
8365 if (!cp_parser_require_keyword (parser, RID_OPERATOR, "`operator'"))
8366 return error_mark_node;
8367 /* When we parse the conversion-type-id, the current scope will be
8368 reset. However, we need that information in able to look up the
8369 conversion function later, so we save it here. */
8370 saved_scope = parser->scope;
8371 saved_qualifying_scope = parser->qualifying_scope;
8372 saved_object_scope = parser->object_scope;
8373 /* We must enter the scope of the class so that the names of
8374 entities declared within the class are available in the
8375 conversion-type-id. For example, consider:
8382 S::operator I() { ... }
8384 In order to see that `I' is a type-name in the definition, we
8385 must be in the scope of `S'. */
8387 pushed_scope = push_scope (saved_scope);
8388 /* Parse the conversion-type-id. */
8389 type = cp_parser_conversion_type_id (parser);
8390 /* Leave the scope of the class, if any. */
8392 pop_scope (pushed_scope);
8393 /* Restore the saved scope. */
8394 parser->scope = saved_scope;
8395 parser->qualifying_scope = saved_qualifying_scope;
8396 parser->object_scope = saved_object_scope;
8397 /* If the TYPE is invalid, indicate failure. */
8398 if (type == error_mark_node)
8399 return error_mark_node;
8400 return mangle_conv_op_name_for_type (type);
8403 /* Parse a conversion-type-id:
8406 type-specifier-seq conversion-declarator [opt]
8408 Returns the TYPE specified. */
8411 cp_parser_conversion_type_id (cp_parser* parser)
8414 cp_decl_specifier_seq type_specifiers;
8415 cp_declarator *declarator;
8416 tree type_specified;
8418 /* Parse the attributes. */
8419 attributes = cp_parser_attributes_opt (parser);
8420 /* Parse the type-specifiers. */
8421 cp_parser_type_specifier_seq (parser, /*is_condition=*/false,
8423 /* If that didn't work, stop. */
8424 if (type_specifiers.type == error_mark_node)
8425 return error_mark_node;
8426 /* Parse the conversion-declarator. */
8427 declarator = cp_parser_conversion_declarator_opt (parser);
8429 type_specified = grokdeclarator (declarator, &type_specifiers, TYPENAME,
8430 /*initialized=*/0, &attributes);
8432 cplus_decl_attributes (&type_specified, attributes, /*flags=*/0);
8433 return type_specified;
8436 /* Parse an (optional) conversion-declarator.
8438 conversion-declarator:
8439 ptr-operator conversion-declarator [opt]
8443 static cp_declarator *
8444 cp_parser_conversion_declarator_opt (cp_parser* parser)
8446 enum tree_code code;
8448 cp_cv_quals cv_quals;
8450 /* We don't know if there's a ptr-operator next, or not. */
8451 cp_parser_parse_tentatively (parser);
8452 /* Try the ptr-operator. */
8453 code = cp_parser_ptr_operator (parser, &class_type, &cv_quals);
8454 /* If it worked, look for more conversion-declarators. */
8455 if (cp_parser_parse_definitely (parser))
8457 cp_declarator *declarator;
8459 /* Parse another optional declarator. */
8460 declarator = cp_parser_conversion_declarator_opt (parser);
8462 /* Create the representation of the declarator. */
8464 declarator = make_ptrmem_declarator (cv_quals, class_type,
8466 else if (code == INDIRECT_REF)
8467 declarator = make_pointer_declarator (cv_quals, declarator);
8469 declarator = make_reference_declarator (cv_quals, declarator);
8477 /* Parse an (optional) ctor-initializer.
8480 : mem-initializer-list
8482 Returns TRUE iff the ctor-initializer was actually present. */
8485 cp_parser_ctor_initializer_opt (cp_parser* parser)
8487 /* If the next token is not a `:', then there is no
8488 ctor-initializer. */
8489 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COLON))
8491 /* Do default initialization of any bases and members. */
8492 if (DECL_CONSTRUCTOR_P (current_function_decl))
8493 finish_mem_initializers (NULL_TREE);
8498 /* Consume the `:' token. */
8499 cp_lexer_consume_token (parser->lexer);
8500 /* And the mem-initializer-list. */
8501 cp_parser_mem_initializer_list (parser);
8506 /* Parse a mem-initializer-list.
8508 mem-initializer-list:
8509 mem-initializer ... [opt]
8510 mem-initializer ... [opt] , mem-initializer-list */
8513 cp_parser_mem_initializer_list (cp_parser* parser)
8515 tree mem_initializer_list = NULL_TREE;
8517 /* Let the semantic analysis code know that we are starting the
8518 mem-initializer-list. */
8519 if (!DECL_CONSTRUCTOR_P (current_function_decl))
8520 error ("only constructors take base initializers");
8522 /* Loop through the list. */
8525 tree mem_initializer;
8527 /* Parse the mem-initializer. */
8528 mem_initializer = cp_parser_mem_initializer (parser);
8529 /* If the next token is a `...', we're expanding member initializers. */
8530 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
8532 /* Consume the `...'. */
8533 cp_lexer_consume_token (parser->lexer);
8535 /* The TREE_PURPOSE must be a _TYPE, because base-specifiers
8536 can be expanded but members cannot. */
8537 if (mem_initializer != error_mark_node
8538 && !TYPE_P (TREE_PURPOSE (mem_initializer)))
8540 error ("cannot expand initializer for member %<%D%>",
8541 TREE_PURPOSE (mem_initializer));
8542 mem_initializer = error_mark_node;
8545 /* Construct the pack expansion type. */
8546 if (mem_initializer != error_mark_node)
8547 mem_initializer = make_pack_expansion (mem_initializer);
8549 /* Add it to the list, unless it was erroneous. */
8550 if (mem_initializer != error_mark_node)
8552 TREE_CHAIN (mem_initializer) = mem_initializer_list;
8553 mem_initializer_list = mem_initializer;
8555 /* If the next token is not a `,', we're done. */
8556 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
8558 /* Consume the `,' token. */
8559 cp_lexer_consume_token (parser->lexer);
8562 /* Perform semantic analysis. */
8563 if (DECL_CONSTRUCTOR_P (current_function_decl))
8564 finish_mem_initializers (mem_initializer_list);
8567 /* Parse a mem-initializer.
8570 mem-initializer-id ( expression-list [opt] )
8575 ( expression-list [opt] )
8577 Returns a TREE_LIST. The TREE_PURPOSE is the TYPE (for a base
8578 class) or FIELD_DECL (for a non-static data member) to initialize;
8579 the TREE_VALUE is the expression-list. An empty initialization
8580 list is represented by void_list_node. */
8583 cp_parser_mem_initializer (cp_parser* parser)
8585 tree mem_initializer_id;
8586 tree expression_list;
8589 /* Find out what is being initialized. */
8590 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
8592 pedwarn ("anachronistic old-style base class initializer");
8593 mem_initializer_id = NULL_TREE;
8596 mem_initializer_id = cp_parser_mem_initializer_id (parser);
8597 member = expand_member_init (mem_initializer_id);
8598 if (member && !DECL_P (member))
8599 in_base_initializer = 1;
8602 = cp_parser_parenthesized_expression_list (parser, false,
8604 /*allow_expansion_p=*/true,
8605 /*non_constant_p=*/NULL);
8606 if (expression_list == error_mark_node)
8607 return error_mark_node;
8608 if (!expression_list)
8609 expression_list = void_type_node;
8611 in_base_initializer = 0;
8613 return member ? build_tree_list (member, expression_list) : error_mark_node;
8616 /* Parse a mem-initializer-id.
8619 :: [opt] nested-name-specifier [opt] class-name
8622 Returns a TYPE indicating the class to be initializer for the first
8623 production. Returns an IDENTIFIER_NODE indicating the data member
8624 to be initialized for the second production. */
8627 cp_parser_mem_initializer_id (cp_parser* parser)
8629 bool global_scope_p;
8630 bool nested_name_specifier_p;
8631 bool template_p = false;
8634 /* `typename' is not allowed in this context ([temp.res]). */
8635 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TYPENAME))
8637 error ("keyword %<typename%> not allowed in this context (a qualified "
8638 "member initializer is implicitly a type)");
8639 cp_lexer_consume_token (parser->lexer);
8641 /* Look for the optional `::' operator. */
8643 = (cp_parser_global_scope_opt (parser,
8644 /*current_scope_valid_p=*/false)
8646 /* Look for the optional nested-name-specifier. The simplest way to
8651 The keyword `typename' is not permitted in a base-specifier or
8652 mem-initializer; in these contexts a qualified name that
8653 depends on a template-parameter is implicitly assumed to be a
8656 is to assume that we have seen the `typename' keyword at this
8658 nested_name_specifier_p
8659 = (cp_parser_nested_name_specifier_opt (parser,
8660 /*typename_keyword_p=*/true,
8661 /*check_dependency_p=*/true,
8663 /*is_declaration=*/true)
8665 if (nested_name_specifier_p)
8666 template_p = cp_parser_optional_template_keyword (parser);
8667 /* If there is a `::' operator or a nested-name-specifier, then we
8668 are definitely looking for a class-name. */
8669 if (global_scope_p || nested_name_specifier_p)
8670 return cp_parser_class_name (parser,
8671 /*typename_keyword_p=*/true,
8672 /*template_keyword_p=*/template_p,
8674 /*check_dependency_p=*/true,
8675 /*class_head_p=*/false,
8676 /*is_declaration=*/true);
8677 /* Otherwise, we could also be looking for an ordinary identifier. */
8678 cp_parser_parse_tentatively (parser);
8679 /* Try a class-name. */
8680 id = cp_parser_class_name (parser,
8681 /*typename_keyword_p=*/true,
8682 /*template_keyword_p=*/false,
8684 /*check_dependency_p=*/true,
8685 /*class_head_p=*/false,
8686 /*is_declaration=*/true);
8687 /* If we found one, we're done. */
8688 if (cp_parser_parse_definitely (parser))
8690 /* Otherwise, look for an ordinary identifier. */
8691 return cp_parser_identifier (parser);
8694 /* Overloading [gram.over] */
8696 /* Parse an operator-function-id.
8698 operator-function-id:
8701 Returns an IDENTIFIER_NODE for the operator which is a
8702 human-readable spelling of the identifier, e.g., `operator +'. */
8705 cp_parser_operator_function_id (cp_parser* parser)
8707 /* Look for the `operator' keyword. */
8708 if (!cp_parser_require_keyword (parser, RID_OPERATOR, "`operator'"))
8709 return error_mark_node;
8710 /* And then the name of the operator itself. */
8711 return cp_parser_operator (parser);
8714 /* Parse an operator.
8717 new delete new[] delete[] + - * / % ^ & | ~ ! = < >
8718 += -= *= /= %= ^= &= |= << >> >>= <<= == != <= >= &&
8719 || ++ -- , ->* -> () []
8726 Returns an IDENTIFIER_NODE for the operator which is a
8727 human-readable spelling of the identifier, e.g., `operator +'. */
8730 cp_parser_operator (cp_parser* parser)
8732 tree id = NULL_TREE;
8735 /* Peek at the next token. */
8736 token = cp_lexer_peek_token (parser->lexer);
8737 /* Figure out which operator we have. */
8738 switch (token->type)
8744 /* The keyword should be either `new' or `delete'. */
8745 if (token->keyword == RID_NEW)
8747 else if (token->keyword == RID_DELETE)
8752 /* Consume the `new' or `delete' token. */
8753 cp_lexer_consume_token (parser->lexer);
8755 /* Peek at the next token. */
8756 token = cp_lexer_peek_token (parser->lexer);
8757 /* If it's a `[' token then this is the array variant of the
8759 if (token->type == CPP_OPEN_SQUARE)
8761 /* Consume the `[' token. */
8762 cp_lexer_consume_token (parser->lexer);
8763 /* Look for the `]' token. */
8764 cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'");
8765 id = ansi_opname (op == NEW_EXPR
8766 ? VEC_NEW_EXPR : VEC_DELETE_EXPR);
8768 /* Otherwise, we have the non-array variant. */
8770 id = ansi_opname (op);
8776 id = ansi_opname (PLUS_EXPR);
8780 id = ansi_opname (MINUS_EXPR);
8784 id = ansi_opname (MULT_EXPR);
8788 id = ansi_opname (TRUNC_DIV_EXPR);
8792 id = ansi_opname (TRUNC_MOD_EXPR);
8796 id = ansi_opname (BIT_XOR_EXPR);
8800 id = ansi_opname (BIT_AND_EXPR);
8804 id = ansi_opname (BIT_IOR_EXPR);
8808 id = ansi_opname (BIT_NOT_EXPR);
8812 id = ansi_opname (TRUTH_NOT_EXPR);
8816 id = ansi_assopname (NOP_EXPR);
8820 id = ansi_opname (LT_EXPR);
8824 id = ansi_opname (GT_EXPR);
8828 id = ansi_assopname (PLUS_EXPR);
8832 id = ansi_assopname (MINUS_EXPR);
8836 id = ansi_assopname (MULT_EXPR);
8840 id = ansi_assopname (TRUNC_DIV_EXPR);
8844 id = ansi_assopname (TRUNC_MOD_EXPR);
8848 id = ansi_assopname (BIT_XOR_EXPR);
8852 id = ansi_assopname (BIT_AND_EXPR);
8856 id = ansi_assopname (BIT_IOR_EXPR);
8860 id = ansi_opname (LSHIFT_EXPR);
8864 id = ansi_opname (RSHIFT_EXPR);
8868 id = ansi_assopname (LSHIFT_EXPR);
8872 id = ansi_assopname (RSHIFT_EXPR);
8876 id = ansi_opname (EQ_EXPR);
8880 id = ansi_opname (NE_EXPR);
8884 id = ansi_opname (LE_EXPR);
8887 case CPP_GREATER_EQ:
8888 id = ansi_opname (GE_EXPR);
8892 id = ansi_opname (TRUTH_ANDIF_EXPR);
8896 id = ansi_opname (TRUTH_ORIF_EXPR);
8900 id = ansi_opname (POSTINCREMENT_EXPR);
8903 case CPP_MINUS_MINUS:
8904 id = ansi_opname (PREDECREMENT_EXPR);
8908 id = ansi_opname (COMPOUND_EXPR);
8911 case CPP_DEREF_STAR:
8912 id = ansi_opname (MEMBER_REF);
8916 id = ansi_opname (COMPONENT_REF);
8919 case CPP_OPEN_PAREN:
8920 /* Consume the `('. */
8921 cp_lexer_consume_token (parser->lexer);
8922 /* Look for the matching `)'. */
8923 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
8924 return ansi_opname (CALL_EXPR);
8926 case CPP_OPEN_SQUARE:
8927 /* Consume the `['. */
8928 cp_lexer_consume_token (parser->lexer);
8929 /* Look for the matching `]'. */
8930 cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'");
8931 return ansi_opname (ARRAY_REF);
8934 /* Anything else is an error. */
8938 /* If we have selected an identifier, we need to consume the
8941 cp_lexer_consume_token (parser->lexer);
8942 /* Otherwise, no valid operator name was present. */
8945 cp_parser_error (parser, "expected operator");
8946 id = error_mark_node;
8952 /* Parse a template-declaration.
8954 template-declaration:
8955 export [opt] template < template-parameter-list > declaration
8957 If MEMBER_P is TRUE, this template-declaration occurs within a
8960 The grammar rule given by the standard isn't correct. What
8963 template-declaration:
8964 export [opt] template-parameter-list-seq
8965 decl-specifier-seq [opt] init-declarator [opt] ;
8966 export [opt] template-parameter-list-seq
8969 template-parameter-list-seq:
8970 template-parameter-list-seq [opt]
8971 template < template-parameter-list > */
8974 cp_parser_template_declaration (cp_parser* parser, bool member_p)
8976 /* Check for `export'. */
8977 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_EXPORT))
8979 /* Consume the `export' token. */
8980 cp_lexer_consume_token (parser->lexer);
8981 /* Warn that we do not support `export'. */
8982 warning (0, "keyword %<export%> not implemented, and will be ignored");
8985 cp_parser_template_declaration_after_export (parser, member_p);
8988 /* Parse a template-parameter-list.
8990 template-parameter-list:
8992 template-parameter-list , template-parameter
8994 Returns a TREE_LIST. Each node represents a template parameter.
8995 The nodes are connected via their TREE_CHAINs. */
8998 cp_parser_template_parameter_list (cp_parser* parser)
9000 tree parameter_list = NULL_TREE;
9002 begin_template_parm_list ();
9008 bool is_parameter_pack;
9010 /* Parse the template-parameter. */
9011 parameter = cp_parser_template_parameter (parser,
9013 &is_parameter_pack);
9014 /* Add it to the list. */
9015 if (parameter != error_mark_node)
9016 parameter_list = process_template_parm (parameter_list,
9022 tree err_parm = build_tree_list (parameter, parameter);
9023 TREE_VALUE (err_parm) = error_mark_node;
9024 parameter_list = chainon (parameter_list, err_parm);
9027 /* Peek at the next token. */
9028 token = cp_lexer_peek_token (parser->lexer);
9029 /* If it's not a `,', we're done. */
9030 if (token->type != CPP_COMMA)
9032 /* Otherwise, consume the `,' token. */
9033 cp_lexer_consume_token (parser->lexer);
9036 return end_template_parm_list (parameter_list);
9039 /* Parse a template-parameter.
9043 parameter-declaration
9045 If all goes well, returns a TREE_LIST. The TREE_VALUE represents
9046 the parameter. The TREE_PURPOSE is the default value, if any.
9047 Returns ERROR_MARK_NODE on failure. *IS_NON_TYPE is set to true
9048 iff this parameter is a non-type parameter. *IS_PARAMETER_PACK is
9049 set to true iff this parameter is a parameter pack. */
9052 cp_parser_template_parameter (cp_parser* parser, bool *is_non_type,
9053 bool *is_parameter_pack)
9056 cp_parameter_declarator *parameter_declarator;
9059 /* Assume it is a type parameter or a template parameter. */
9060 *is_non_type = false;
9061 /* Assume it not a parameter pack. */
9062 *is_parameter_pack = false;
9063 /* Peek at the next token. */
9064 token = cp_lexer_peek_token (parser->lexer);
9065 /* If it is `class' or `template', we have a type-parameter. */
9066 if (token->keyword == RID_TEMPLATE)
9067 return cp_parser_type_parameter (parser, is_parameter_pack);
9068 /* If it is `class' or `typename' we do not know yet whether it is a
9069 type parameter or a non-type parameter. Consider:
9071 template <typename T, typename T::X X> ...
9075 template <class C, class D*> ...
9077 Here, the first parameter is a type parameter, and the second is
9078 a non-type parameter. We can tell by looking at the token after
9079 the identifier -- if it is a `,', `=', or `>' then we have a type
9081 if (token->keyword == RID_TYPENAME || token->keyword == RID_CLASS)
9083 /* Peek at the token after `class' or `typename'. */
9084 token = cp_lexer_peek_nth_token (parser->lexer, 2);
9085 /* If it's an ellipsis, we have a template type parameter
9087 if (token->type == CPP_ELLIPSIS)
9088 return cp_parser_type_parameter (parser, is_parameter_pack);
9089 /* If it's an identifier, skip it. */
9090 if (token->type == CPP_NAME)
9091 token = cp_lexer_peek_nth_token (parser->lexer, 3);
9092 /* Now, see if the token looks like the end of a template
9094 if (token->type == CPP_COMMA
9095 || token->type == CPP_EQ
9096 || token->type == CPP_GREATER)
9097 return cp_parser_type_parameter (parser, is_parameter_pack);
9100 /* Otherwise, it is a non-type parameter.
9104 When parsing a default template-argument for a non-type
9105 template-parameter, the first non-nested `>' is taken as the end
9106 of the template parameter-list rather than a greater-than
9108 *is_non_type = true;
9109 parameter_declarator
9110 = cp_parser_parameter_declaration (parser, /*template_parm_p=*/true,
9111 /*parenthesized_p=*/NULL);
9113 /* If the parameter declaration is marked as a parameter pack, set
9114 *IS_PARAMETER_PACK to notify the caller. Also, unmark the
9115 declarator's PACK_EXPANSION_P, otherwise we'll get errors from
9117 if (parameter_declarator
9118 && parameter_declarator->declarator
9119 && parameter_declarator->declarator->parameter_pack_p)
9121 *is_parameter_pack = true;
9122 parameter_declarator->declarator->parameter_pack_p = false;
9125 /* If the next token is an ellipsis, and we don't already have it
9126 marked as a parameter pack, then we have a parameter pack (that
9127 has no declarator); */
9128 if (!*is_parameter_pack
9129 && cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS)
9130 && declarator_can_be_parameter_pack (parameter_declarator->declarator))
9132 /* Consume the `...'. */
9133 cp_lexer_consume_token (parser->lexer);
9134 maybe_warn_variadic_templates ();
9136 *is_parameter_pack = true;
9139 parm = grokdeclarator (parameter_declarator->declarator,
9140 ¶meter_declarator->decl_specifiers,
9141 PARM, /*initialized=*/0,
9143 if (parm == error_mark_node)
9144 return error_mark_node;
9146 return build_tree_list (parameter_declarator->default_argument, parm);
9149 /* Parse a type-parameter.
9152 class identifier [opt]
9153 class identifier [opt] = type-id
9154 typename identifier [opt]
9155 typename identifier [opt] = type-id
9156 template < template-parameter-list > class identifier [opt]
9157 template < template-parameter-list > class identifier [opt]
9160 GNU Extension (variadic templates):
9163 class ... identifier [opt]
9164 typename ... identifier [opt]
9166 Returns a TREE_LIST. The TREE_VALUE is itself a TREE_LIST. The
9167 TREE_PURPOSE is the default-argument, if any. The TREE_VALUE is
9168 the declaration of the parameter.
9170 Sets *IS_PARAMETER_PACK if this is a template parameter pack. */
9173 cp_parser_type_parameter (cp_parser* parser, bool *is_parameter_pack)
9178 /* Look for a keyword to tell us what kind of parameter this is. */
9179 token = cp_parser_require (parser, CPP_KEYWORD,
9180 "`class', `typename', or `template'");
9182 return error_mark_node;
9184 switch (token->keyword)
9190 tree default_argument;
9192 /* If the next token is an ellipsis, we have a template
9194 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
9196 /* Consume the `...' token. */
9197 cp_lexer_consume_token (parser->lexer);
9198 maybe_warn_variadic_templates ();
9200 *is_parameter_pack = true;
9203 /* If the next token is an identifier, then it names the
9205 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
9206 identifier = cp_parser_identifier (parser);
9208 identifier = NULL_TREE;
9210 /* Create the parameter. */
9211 parameter = finish_template_type_parm (class_type_node, identifier);
9213 /* If the next token is an `=', we have a default argument. */
9214 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
9216 /* Consume the `=' token. */
9217 cp_lexer_consume_token (parser->lexer);
9218 /* Parse the default-argument. */
9219 push_deferring_access_checks (dk_no_deferred);
9220 default_argument = cp_parser_type_id (parser);
9222 /* Template parameter packs cannot have default
9224 if (*is_parameter_pack)
9227 error ("template parameter pack %qD cannot have a default argument",
9230 error ("template parameter packs cannot have default arguments");
9231 default_argument = NULL_TREE;
9233 pop_deferring_access_checks ();
9236 default_argument = NULL_TREE;
9238 /* Create the combined representation of the parameter and the
9239 default argument. */
9240 parameter = build_tree_list (default_argument, parameter);
9246 tree parameter_list;
9248 tree default_argument;
9250 /* Look for the `<'. */
9251 cp_parser_require (parser, CPP_LESS, "`<'");
9252 /* Parse the template-parameter-list. */
9253 parameter_list = cp_parser_template_parameter_list (parser);
9254 /* Look for the `>'. */
9255 cp_parser_require (parser, CPP_GREATER, "`>'");
9256 /* Look for the `class' keyword. */
9257 cp_parser_require_keyword (parser, RID_CLASS, "`class'");
9258 /* If the next token is an ellipsis, we have a template
9260 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
9262 /* Consume the `...' token. */
9263 cp_lexer_consume_token (parser->lexer);
9264 maybe_warn_variadic_templates ();
9266 *is_parameter_pack = true;
9268 /* If the next token is an `=', then there is a
9269 default-argument. If the next token is a `>', we are at
9270 the end of the parameter-list. If the next token is a `,',
9271 then we are at the end of this parameter. */
9272 if (cp_lexer_next_token_is_not (parser->lexer, CPP_EQ)
9273 && cp_lexer_next_token_is_not (parser->lexer, CPP_GREATER)
9274 && cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
9276 identifier = cp_parser_identifier (parser);
9277 /* Treat invalid names as if the parameter were nameless. */
9278 if (identifier == error_mark_node)
9279 identifier = NULL_TREE;
9282 identifier = NULL_TREE;
9284 /* Create the template parameter. */
9285 parameter = finish_template_template_parm (class_type_node,
9288 /* If the next token is an `=', then there is a
9289 default-argument. */
9290 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
9294 /* Consume the `='. */
9295 cp_lexer_consume_token (parser->lexer);
9296 /* Parse the id-expression. */
9297 push_deferring_access_checks (dk_no_deferred);
9299 = cp_parser_id_expression (parser,
9300 /*template_keyword_p=*/false,
9301 /*check_dependency_p=*/true,
9302 /*template_p=*/&is_template,
9303 /*declarator_p=*/false,
9304 /*optional_p=*/false);
9305 if (TREE_CODE (default_argument) == TYPE_DECL)
9306 /* If the id-expression was a template-id that refers to
9307 a template-class, we already have the declaration here,
9308 so no further lookup is needed. */
9311 /* Look up the name. */
9313 = cp_parser_lookup_name (parser, default_argument,
9315 /*is_template=*/is_template,
9316 /*is_namespace=*/false,
9317 /*check_dependency=*/true,
9318 /*ambiguous_decls=*/NULL);
9319 /* See if the default argument is valid. */
9321 = check_template_template_default_arg (default_argument);
9323 /* Template parameter packs cannot have default
9325 if (*is_parameter_pack)
9328 error ("template parameter pack %qD cannot have a default argument",
9331 error ("template parameter packs cannot have default arguments");
9332 default_argument = NULL_TREE;
9334 pop_deferring_access_checks ();
9337 default_argument = NULL_TREE;
9339 /* Create the combined representation of the parameter and the
9340 default argument. */
9341 parameter = build_tree_list (default_argument, parameter);
9353 /* Parse a template-id.
9356 template-name < template-argument-list [opt] >
9358 If TEMPLATE_KEYWORD_P is TRUE, then we have just seen the
9359 `template' keyword. In this case, a TEMPLATE_ID_EXPR will be
9360 returned. Otherwise, if the template-name names a function, or set
9361 of functions, returns a TEMPLATE_ID_EXPR. If the template-name
9362 names a class, returns a TYPE_DECL for the specialization.
9364 If CHECK_DEPENDENCY_P is FALSE, names are looked up in
9365 uninstantiated templates. */
9368 cp_parser_template_id (cp_parser *parser,
9369 bool template_keyword_p,
9370 bool check_dependency_p,
9371 bool is_declaration)
9377 cp_token_position start_of_id = 0;
9378 deferred_access_check *chk;
9379 VEC (deferred_access_check,gc) *access_check;
9380 cp_token *next_token, *next_token_2;
9383 /* If the next token corresponds to a template-id, there is no need
9385 next_token = cp_lexer_peek_token (parser->lexer);
9386 if (next_token->type == CPP_TEMPLATE_ID)
9388 struct tree_check *check_value;
9390 /* Get the stored value. */
9391 check_value = cp_lexer_consume_token (parser->lexer)->u.tree_check_value;
9392 /* Perform any access checks that were deferred. */
9393 access_check = check_value->checks;
9397 VEC_iterate (deferred_access_check, access_check, i, chk) ;
9400 perform_or_defer_access_check (chk->binfo,
9405 /* Return the stored value. */
9406 return check_value->value;
9409 /* Avoid performing name lookup if there is no possibility of
9410 finding a template-id. */
9411 if ((next_token->type != CPP_NAME && next_token->keyword != RID_OPERATOR)
9412 || (next_token->type == CPP_NAME
9413 && !cp_parser_nth_token_starts_template_argument_list_p
9416 cp_parser_error (parser, "expected template-id");
9417 return error_mark_node;
9420 /* Remember where the template-id starts. */
9421 if (cp_parser_uncommitted_to_tentative_parse_p (parser))
9422 start_of_id = cp_lexer_token_position (parser->lexer, false);
9424 push_deferring_access_checks (dk_deferred);
9426 /* Parse the template-name. */
9427 is_identifier = false;
9428 template = cp_parser_template_name (parser, template_keyword_p,
9432 if (template == error_mark_node || is_identifier)
9434 pop_deferring_access_checks ();
9438 /* If we find the sequence `[:' after a template-name, it's probably
9439 a digraph-typo for `< ::'. Substitute the tokens and check if we can
9440 parse correctly the argument list. */
9441 next_token = cp_lexer_peek_token (parser->lexer);
9442 next_token_2 = cp_lexer_peek_nth_token (parser->lexer, 2);
9443 if (next_token->type == CPP_OPEN_SQUARE
9444 && next_token->flags & DIGRAPH
9445 && next_token_2->type == CPP_COLON
9446 && !(next_token_2->flags & PREV_WHITE))
9448 cp_parser_parse_tentatively (parser);
9449 /* Change `:' into `::'. */
9450 next_token_2->type = CPP_SCOPE;
9451 /* Consume the first token (CPP_OPEN_SQUARE - which we pretend it is
9453 cp_lexer_consume_token (parser->lexer);
9454 /* Parse the arguments. */
9455 arguments = cp_parser_enclosed_template_argument_list (parser);
9456 if (!cp_parser_parse_definitely (parser))
9458 /* If we couldn't parse an argument list, then we revert our changes
9459 and return simply an error. Maybe this is not a template-id
9461 next_token_2->type = CPP_COLON;
9462 cp_parser_error (parser, "expected %<<%>");
9463 pop_deferring_access_checks ();
9464 return error_mark_node;
9466 /* Otherwise, emit an error about the invalid digraph, but continue
9467 parsing because we got our argument list. */
9468 pedwarn ("%<<::%> cannot begin a template-argument list");
9469 inform ("%<<:%> is an alternate spelling for %<[%>. Insert whitespace "
9470 "between %<<%> and %<::%>");
9471 if (!flag_permissive)
9476 inform ("(if you use -fpermissive G++ will accept your code)");
9483 /* Look for the `<' that starts the template-argument-list. */
9484 if (!cp_parser_require (parser, CPP_LESS, "`<'"))
9486 pop_deferring_access_checks ();
9487 return error_mark_node;
9489 /* Parse the arguments. */
9490 arguments = cp_parser_enclosed_template_argument_list (parser);
9493 /* Build a representation of the specialization. */
9494 if (TREE_CODE (template) == IDENTIFIER_NODE)
9495 template_id = build_min_nt (TEMPLATE_ID_EXPR, template, arguments);
9496 else if (DECL_CLASS_TEMPLATE_P (template)
9497 || DECL_TEMPLATE_TEMPLATE_PARM_P (template))
9499 bool entering_scope;
9500 /* In "template <typename T> ... A<T>::", A<T> is the abstract A
9501 template (rather than some instantiation thereof) only if
9502 is not nested within some other construct. For example, in
9503 "template <typename T> void f(T) { A<T>::", A<T> is just an
9504 instantiation of A. */
9505 entering_scope = (template_parm_scope_p ()
9506 && cp_lexer_next_token_is (parser->lexer,
9509 = finish_template_type (template, arguments, entering_scope);
9513 /* If it's not a class-template or a template-template, it should be
9514 a function-template. */
9515 gcc_assert ((DECL_FUNCTION_TEMPLATE_P (template)
9516 || TREE_CODE (template) == OVERLOAD
9517 || BASELINK_P (template)));
9519 template_id = lookup_template_function (template, arguments);
9522 /* If parsing tentatively, replace the sequence of tokens that makes
9523 up the template-id with a CPP_TEMPLATE_ID token. That way,
9524 should we re-parse the token stream, we will not have to repeat
9525 the effort required to do the parse, nor will we issue duplicate
9526 error messages about problems during instantiation of the
9530 cp_token *token = cp_lexer_token_at (parser->lexer, start_of_id);
9532 /* Reset the contents of the START_OF_ID token. */
9533 token->type = CPP_TEMPLATE_ID;
9534 /* Retrieve any deferred checks. Do not pop this access checks yet
9535 so the memory will not be reclaimed during token replacing below. */
9536 token->u.tree_check_value = GGC_CNEW (struct tree_check);
9537 token->u.tree_check_value->value = template_id;
9538 token->u.tree_check_value->checks = get_deferred_access_checks ();
9539 token->keyword = RID_MAX;
9541 /* Purge all subsequent tokens. */
9542 cp_lexer_purge_tokens_after (parser->lexer, start_of_id);
9544 /* ??? Can we actually assume that, if template_id ==
9545 error_mark_node, we will have issued a diagnostic to the
9546 user, as opposed to simply marking the tentative parse as
9548 if (cp_parser_error_occurred (parser) && template_id != error_mark_node)
9549 error ("parse error in template argument list");
9552 pop_deferring_access_checks ();
9556 /* Parse a template-name.
9561 The standard should actually say:
9565 operator-function-id
9567 A defect report has been filed about this issue.
9569 A conversion-function-id cannot be a template name because they cannot
9570 be part of a template-id. In fact, looking at this code:
9574 the conversion-function-id is "operator K<int>", and K<int> is a type-id.
9575 It is impossible to call a templated conversion-function-id with an
9576 explicit argument list, since the only allowed template parameter is
9577 the type to which it is converting.
9579 If TEMPLATE_KEYWORD_P is true, then we have just seen the
9580 `template' keyword, in a construction like:
9584 In that case `f' is taken to be a template-name, even though there
9585 is no way of knowing for sure.
9587 Returns the TEMPLATE_DECL for the template, or an OVERLOAD if the
9588 name refers to a set of overloaded functions, at least one of which
9589 is a template, or an IDENTIFIER_NODE with the name of the template,
9590 if TEMPLATE_KEYWORD_P is true. If CHECK_DEPENDENCY_P is FALSE,
9591 names are looked up inside uninstantiated templates. */
9594 cp_parser_template_name (cp_parser* parser,
9595 bool template_keyword_p,
9596 bool check_dependency_p,
9597 bool is_declaration,
9598 bool *is_identifier)
9604 /* If the next token is `operator', then we have either an
9605 operator-function-id or a conversion-function-id. */
9606 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_OPERATOR))
9608 /* We don't know whether we're looking at an
9609 operator-function-id or a conversion-function-id. */
9610 cp_parser_parse_tentatively (parser);
9611 /* Try an operator-function-id. */
9612 identifier = cp_parser_operator_function_id (parser);
9613 /* If that didn't work, try a conversion-function-id. */
9614 if (!cp_parser_parse_definitely (parser))
9616 cp_parser_error (parser, "expected template-name");
9617 return error_mark_node;
9620 /* Look for the identifier. */
9622 identifier = cp_parser_identifier (parser);
9624 /* If we didn't find an identifier, we don't have a template-id. */
9625 if (identifier == error_mark_node)
9626 return error_mark_node;
9628 /* If the name immediately followed the `template' keyword, then it
9629 is a template-name. However, if the next token is not `<', then
9630 we do not treat it as a template-name, since it is not being used
9631 as part of a template-id. This enables us to handle constructs
9634 template <typename T> struct S { S(); };
9635 template <typename T> S<T>::S();
9637 correctly. We would treat `S' as a template -- if it were `S<T>'
9638 -- but we do not if there is no `<'. */
9640 if (processing_template_decl
9641 && cp_parser_nth_token_starts_template_argument_list_p (parser, 1))
9643 /* In a declaration, in a dependent context, we pretend that the
9644 "template" keyword was present in order to improve error
9645 recovery. For example, given:
9647 template <typename T> void f(T::X<int>);
9649 we want to treat "X<int>" as a template-id. */
9651 && !template_keyword_p
9652 && parser->scope && TYPE_P (parser->scope)
9653 && check_dependency_p
9654 && dependent_type_p (parser->scope)
9655 /* Do not do this for dtors (or ctors), since they never
9656 need the template keyword before their name. */
9657 && !constructor_name_p (identifier, parser->scope))
9659 cp_token_position start = 0;
9661 /* Explain what went wrong. */
9662 error ("non-template %qD used as template", identifier);
9663 inform ("use %<%T::template %D%> to indicate that it is a template",
9664 parser->scope, identifier);
9665 /* If parsing tentatively, find the location of the "<" token. */
9666 if (cp_parser_simulate_error (parser))
9667 start = cp_lexer_token_position (parser->lexer, true);
9668 /* Parse the template arguments so that we can issue error
9669 messages about them. */
9670 cp_lexer_consume_token (parser->lexer);
9671 cp_parser_enclosed_template_argument_list (parser);
9672 /* Skip tokens until we find a good place from which to
9673 continue parsing. */
9674 cp_parser_skip_to_closing_parenthesis (parser,
9675 /*recovering=*/true,
9677 /*consume_paren=*/false);
9678 /* If parsing tentatively, permanently remove the
9679 template argument list. That will prevent duplicate
9680 error messages from being issued about the missing
9681 "template" keyword. */
9683 cp_lexer_purge_tokens_after (parser->lexer, start);
9685 *is_identifier = true;
9689 /* If the "template" keyword is present, then there is generally
9690 no point in doing name-lookup, so we just return IDENTIFIER.
9691 But, if the qualifying scope is non-dependent then we can
9692 (and must) do name-lookup normally. */
9693 if (template_keyword_p
9695 || (TYPE_P (parser->scope)
9696 && dependent_type_p (parser->scope))))
9700 /* Look up the name. */
9701 decl = cp_parser_lookup_name (parser, identifier,
9703 /*is_template=*/false,
9704 /*is_namespace=*/false,
9706 /*ambiguous_decls=*/NULL);
9707 decl = maybe_get_template_decl_from_type_decl (decl);
9709 /* If DECL is a template, then the name was a template-name. */
9710 if (TREE_CODE (decl) == TEMPLATE_DECL)
9714 tree fn = NULL_TREE;
9716 /* The standard does not explicitly indicate whether a name that
9717 names a set of overloaded declarations, some of which are
9718 templates, is a template-name. However, such a name should
9719 be a template-name; otherwise, there is no way to form a
9720 template-id for the overloaded templates. */
9721 fns = BASELINK_P (decl) ? BASELINK_FUNCTIONS (decl) : decl;
9722 if (TREE_CODE (fns) == OVERLOAD)
9723 for (fn = fns; fn; fn = OVL_NEXT (fn))
9724 if (TREE_CODE (OVL_CURRENT (fn)) == TEMPLATE_DECL)
9729 /* The name does not name a template. */
9730 cp_parser_error (parser, "expected template-name");
9731 return error_mark_node;
9735 /* If DECL is dependent, and refers to a function, then just return
9736 its name; we will look it up again during template instantiation. */
9737 if (DECL_FUNCTION_TEMPLATE_P (decl) || !DECL_P (decl))
9739 tree scope = CP_DECL_CONTEXT (get_first_fn (decl));
9740 if (TYPE_P (scope) && dependent_type_p (scope))
9747 /* Parse a template-argument-list.
9749 template-argument-list:
9750 template-argument ... [opt]
9751 template-argument-list , template-argument ... [opt]
9753 Returns a TREE_VEC containing the arguments. */
9756 cp_parser_template_argument_list (cp_parser* parser)
9758 tree fixed_args[10];
9759 unsigned n_args = 0;
9760 unsigned alloced = 10;
9761 tree *arg_ary = fixed_args;
9763 bool saved_in_template_argument_list_p;
9765 bool saved_non_ice_p;
9767 saved_in_template_argument_list_p = parser->in_template_argument_list_p;
9768 parser->in_template_argument_list_p = true;
9769 /* Even if the template-id appears in an integral
9770 constant-expression, the contents of the argument list do
9772 saved_ice_p = parser->integral_constant_expression_p;
9773 parser->integral_constant_expression_p = false;
9774 saved_non_ice_p = parser->non_integral_constant_expression_p;
9775 parser->non_integral_constant_expression_p = false;
9776 /* Parse the arguments. */
9782 /* Consume the comma. */
9783 cp_lexer_consume_token (parser->lexer);
9785 /* Parse the template-argument. */
9786 argument = cp_parser_template_argument (parser);
9788 /* If the next token is an ellipsis, we're expanding a template
9790 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
9792 /* Consume the `...' token. */
9793 cp_lexer_consume_token (parser->lexer);
9795 /* Make the argument into a TYPE_PACK_EXPANSION or
9796 EXPR_PACK_EXPANSION. */
9797 argument = make_pack_expansion (argument);
9800 if (n_args == alloced)
9804 if (arg_ary == fixed_args)
9806 arg_ary = XNEWVEC (tree, alloced);
9807 memcpy (arg_ary, fixed_args, sizeof (tree) * n_args);
9810 arg_ary = XRESIZEVEC (tree, arg_ary, alloced);
9812 arg_ary[n_args++] = argument;
9814 while (cp_lexer_next_token_is (parser->lexer, CPP_COMMA));
9816 vec = make_tree_vec (n_args);
9819 TREE_VEC_ELT (vec, n_args) = arg_ary[n_args];
9821 if (arg_ary != fixed_args)
9823 parser->non_integral_constant_expression_p = saved_non_ice_p;
9824 parser->integral_constant_expression_p = saved_ice_p;
9825 parser->in_template_argument_list_p = saved_in_template_argument_list_p;
9829 /* Parse a template-argument.
9832 assignment-expression
9836 The representation is that of an assignment-expression, type-id, or
9837 id-expression -- except that the qualified id-expression is
9838 evaluated, so that the value returned is either a DECL or an
9841 Although the standard says "assignment-expression", it forbids
9842 throw-expressions or assignments in the template argument.
9843 Therefore, we use "conditional-expression" instead. */
9846 cp_parser_template_argument (cp_parser* parser)
9851 bool maybe_type_id = false;
9855 /* There's really no way to know what we're looking at, so we just
9856 try each alternative in order.
9860 In a template-argument, an ambiguity between a type-id and an
9861 expression is resolved to a type-id, regardless of the form of
9862 the corresponding template-parameter.
9864 Therefore, we try a type-id first. */
9865 cp_parser_parse_tentatively (parser);
9866 argument = cp_parser_type_id (parser);
9867 /* If there was no error parsing the type-id but the next token is a '>>',
9868 we probably found a typo for '> >'. But there are type-id which are
9869 also valid expressions. For instance:
9871 struct X { int operator >> (int); };
9872 template <int V> struct Foo {};
9875 Here 'X()' is a valid type-id of a function type, but the user just
9876 wanted to write the expression "X() >> 5". Thus, we remember that we
9877 found a valid type-id, but we still try to parse the argument as an
9878 expression to see what happens. */
9879 if (!cp_parser_error_occurred (parser)
9880 && cp_lexer_next_token_is (parser->lexer, CPP_RSHIFT))
9882 maybe_type_id = true;
9883 cp_parser_abort_tentative_parse (parser);
9887 /* If the next token isn't a `,' or a `>', then this argument wasn't
9888 really finished. This means that the argument is not a valid
9890 if (!cp_parser_next_token_ends_template_argument_p (parser))
9891 cp_parser_error (parser, "expected template-argument");
9892 /* If that worked, we're done. */
9893 if (cp_parser_parse_definitely (parser))
9896 /* We're still not sure what the argument will be. */
9897 cp_parser_parse_tentatively (parser);
9898 /* Try a template. */
9899 argument = cp_parser_id_expression (parser,
9900 /*template_keyword_p=*/false,
9901 /*check_dependency_p=*/true,
9903 /*declarator_p=*/false,
9904 /*optional_p=*/false);
9905 /* If the next token isn't a `,' or a `>', then this argument wasn't
9907 if (!cp_parser_next_token_ends_template_argument_p (parser))
9908 cp_parser_error (parser, "expected template-argument");
9909 if (!cp_parser_error_occurred (parser))
9911 /* Figure out what is being referred to. If the id-expression
9912 was for a class template specialization, then we will have a
9913 TYPE_DECL at this point. There is no need to do name lookup
9914 at this point in that case. */
9915 if (TREE_CODE (argument) != TYPE_DECL)
9916 argument = cp_parser_lookup_name (parser, argument,
9918 /*is_template=*/template_p,
9919 /*is_namespace=*/false,
9920 /*check_dependency=*/true,
9921 /*ambiguous_decls=*/NULL);
9922 if (TREE_CODE (argument) != TEMPLATE_DECL
9923 && TREE_CODE (argument) != UNBOUND_CLASS_TEMPLATE)
9924 cp_parser_error (parser, "expected template-name");
9926 if (cp_parser_parse_definitely (parser))
9928 /* It must be a non-type argument. There permitted cases are given
9929 in [temp.arg.nontype]:
9931 -- an integral constant-expression of integral or enumeration
9934 -- the name of a non-type template-parameter; or
9936 -- the name of an object or function with external linkage...
9938 -- the address of an object or function with external linkage...
9940 -- a pointer to member... */
9941 /* Look for a non-type template parameter. */
9942 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
9944 cp_parser_parse_tentatively (parser);
9945 argument = cp_parser_primary_expression (parser,
9948 /*template_arg_p=*/true,
9950 if (TREE_CODE (argument) != TEMPLATE_PARM_INDEX
9951 || !cp_parser_next_token_ends_template_argument_p (parser))
9952 cp_parser_simulate_error (parser);
9953 if (cp_parser_parse_definitely (parser))
9957 /* If the next token is "&", the argument must be the address of an
9958 object or function with external linkage. */
9959 address_p = cp_lexer_next_token_is (parser->lexer, CPP_AND);
9961 cp_lexer_consume_token (parser->lexer);
9962 /* See if we might have an id-expression. */
9963 token = cp_lexer_peek_token (parser->lexer);
9964 if (token->type == CPP_NAME
9965 || token->keyword == RID_OPERATOR
9966 || token->type == CPP_SCOPE
9967 || token->type == CPP_TEMPLATE_ID
9968 || token->type == CPP_NESTED_NAME_SPECIFIER)
9970 cp_parser_parse_tentatively (parser);
9971 argument = cp_parser_primary_expression (parser,
9974 /*template_arg_p=*/true,
9976 if (cp_parser_error_occurred (parser)
9977 || !cp_parser_next_token_ends_template_argument_p (parser))
9978 cp_parser_abort_tentative_parse (parser);
9981 if (TREE_CODE (argument) == INDIRECT_REF)
9983 gcc_assert (REFERENCE_REF_P (argument));
9984 argument = TREE_OPERAND (argument, 0);
9987 if (TREE_CODE (argument) == VAR_DECL)
9989 /* A variable without external linkage might still be a
9990 valid constant-expression, so no error is issued here
9991 if the external-linkage check fails. */
9992 if (!address_p && !DECL_EXTERNAL_LINKAGE_P (argument))
9993 cp_parser_simulate_error (parser);
9995 else if (is_overloaded_fn (argument))
9996 /* All overloaded functions are allowed; if the external
9997 linkage test does not pass, an error will be issued
10001 && (TREE_CODE (argument) == OFFSET_REF
10002 || TREE_CODE (argument) == SCOPE_REF))
10003 /* A pointer-to-member. */
10005 else if (TREE_CODE (argument) == TEMPLATE_PARM_INDEX)
10008 cp_parser_simulate_error (parser);
10010 if (cp_parser_parse_definitely (parser))
10013 argument = build_x_unary_op (ADDR_EXPR, argument);
10018 /* If the argument started with "&", there are no other valid
10019 alternatives at this point. */
10022 cp_parser_error (parser, "invalid non-type template argument");
10023 return error_mark_node;
10026 /* If the argument wasn't successfully parsed as a type-id followed
10027 by '>>', the argument can only be a constant expression now.
10028 Otherwise, we try parsing the constant-expression tentatively,
10029 because the argument could really be a type-id. */
10031 cp_parser_parse_tentatively (parser);
10032 argument = cp_parser_constant_expression (parser,
10033 /*allow_non_constant_p=*/false,
10034 /*non_constant_p=*/NULL);
10035 argument = fold_non_dependent_expr (argument);
10036 if (!maybe_type_id)
10038 if (!cp_parser_next_token_ends_template_argument_p (parser))
10039 cp_parser_error (parser, "expected template-argument");
10040 if (cp_parser_parse_definitely (parser))
10042 /* We did our best to parse the argument as a non type-id, but that
10043 was the only alternative that matched (albeit with a '>' after
10044 it). We can assume it's just a typo from the user, and a
10045 diagnostic will then be issued. */
10046 return cp_parser_type_id (parser);
10049 /* Parse an explicit-instantiation.
10051 explicit-instantiation:
10052 template declaration
10054 Although the standard says `declaration', what it really means is:
10056 explicit-instantiation:
10057 template decl-specifier-seq [opt] declarator [opt] ;
10059 Things like `template int S<int>::i = 5, int S<double>::j;' are not
10060 supposed to be allowed. A defect report has been filed about this
10065 explicit-instantiation:
10066 storage-class-specifier template
10067 decl-specifier-seq [opt] declarator [opt] ;
10068 function-specifier template
10069 decl-specifier-seq [opt] declarator [opt] ; */
10072 cp_parser_explicit_instantiation (cp_parser* parser)
10074 int declares_class_or_enum;
10075 cp_decl_specifier_seq decl_specifiers;
10076 tree extension_specifier = NULL_TREE;
10078 /* Look for an (optional) storage-class-specifier or
10079 function-specifier. */
10080 if (cp_parser_allow_gnu_extensions_p (parser))
10082 extension_specifier
10083 = cp_parser_storage_class_specifier_opt (parser);
10084 if (!extension_specifier)
10085 extension_specifier
10086 = cp_parser_function_specifier_opt (parser,
10087 /*decl_specs=*/NULL);
10090 /* Look for the `template' keyword. */
10091 cp_parser_require_keyword (parser, RID_TEMPLATE, "`template'");
10092 /* Let the front end know that we are processing an explicit
10094 begin_explicit_instantiation ();
10095 /* [temp.explicit] says that we are supposed to ignore access
10096 control while processing explicit instantiation directives. */
10097 push_deferring_access_checks (dk_no_check);
10098 /* Parse a decl-specifier-seq. */
10099 cp_parser_decl_specifier_seq (parser,
10100 CP_PARSER_FLAGS_OPTIONAL,
10102 &declares_class_or_enum);
10103 /* If there was exactly one decl-specifier, and it declared a class,
10104 and there's no declarator, then we have an explicit type
10106 if (declares_class_or_enum && cp_parser_declares_only_class_p (parser))
10110 type = check_tag_decl (&decl_specifiers);
10111 /* Turn access control back on for names used during
10112 template instantiation. */
10113 pop_deferring_access_checks ();
10115 do_type_instantiation (type, extension_specifier,
10116 /*complain=*/tf_error);
10120 cp_declarator *declarator;
10123 /* Parse the declarator. */
10125 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
10126 /*ctor_dtor_or_conv_p=*/NULL,
10127 /*parenthesized_p=*/NULL,
10128 /*member_p=*/false);
10129 if (declares_class_or_enum & 2)
10130 cp_parser_check_for_definition_in_return_type (declarator,
10131 decl_specifiers.type);
10132 if (declarator != cp_error_declarator)
10134 decl = grokdeclarator (declarator, &decl_specifiers,
10135 NORMAL, 0, &decl_specifiers.attributes);
10136 /* Turn access control back on for names used during
10137 template instantiation. */
10138 pop_deferring_access_checks ();
10139 /* Do the explicit instantiation. */
10140 do_decl_instantiation (decl, extension_specifier);
10144 pop_deferring_access_checks ();
10145 /* Skip the body of the explicit instantiation. */
10146 cp_parser_skip_to_end_of_statement (parser);
10149 /* We're done with the instantiation. */
10150 end_explicit_instantiation ();
10152 cp_parser_consume_semicolon_at_end_of_statement (parser);
10155 /* Parse an explicit-specialization.
10157 explicit-specialization:
10158 template < > declaration
10160 Although the standard says `declaration', what it really means is:
10162 explicit-specialization:
10163 template <> decl-specifier [opt] init-declarator [opt] ;
10164 template <> function-definition
10165 template <> explicit-specialization
10166 template <> template-declaration */
10169 cp_parser_explicit_specialization (cp_parser* parser)
10171 bool need_lang_pop;
10172 /* Look for the `template' keyword. */
10173 cp_parser_require_keyword (parser, RID_TEMPLATE, "`template'");
10174 /* Look for the `<'. */
10175 cp_parser_require (parser, CPP_LESS, "`<'");
10176 /* Look for the `>'. */
10177 cp_parser_require (parser, CPP_GREATER, "`>'");
10178 /* We have processed another parameter list. */
10179 ++parser->num_template_parameter_lists;
10182 A template ... explicit specialization ... shall not have C
10184 if (current_lang_name == lang_name_c)
10186 error ("template specialization with C linkage");
10187 /* Give it C++ linkage to avoid confusing other parts of the
10189 push_lang_context (lang_name_cplusplus);
10190 need_lang_pop = true;
10193 need_lang_pop = false;
10194 /* Let the front end know that we are beginning a specialization. */
10195 if (!begin_specialization ())
10197 end_specialization ();
10198 cp_parser_skip_to_end_of_block_or_statement (parser);
10202 /* If the next keyword is `template', we need to figure out whether
10203 or not we're looking a template-declaration. */
10204 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
10206 if (cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_LESS
10207 && cp_lexer_peek_nth_token (parser->lexer, 3)->type != CPP_GREATER)
10208 cp_parser_template_declaration_after_export (parser,
10209 /*member_p=*/false);
10211 cp_parser_explicit_specialization (parser);
10214 /* Parse the dependent declaration. */
10215 cp_parser_single_declaration (parser,
10217 /*member_p=*/false,
10218 /*friend_p=*/NULL);
10219 /* We're done with the specialization. */
10220 end_specialization ();
10221 /* For the erroneous case of a template with C linkage, we pushed an
10222 implicit C++ linkage scope; exit that scope now. */
10224 pop_lang_context ();
10225 /* We're done with this parameter list. */
10226 --parser->num_template_parameter_lists;
10229 /* Parse a type-specifier.
10232 simple-type-specifier
10235 elaborated-type-specifier
10243 Returns a representation of the type-specifier. For a
10244 class-specifier, enum-specifier, or elaborated-type-specifier, a
10245 TREE_TYPE is returned; otherwise, a TYPE_DECL is returned.
10247 The parser flags FLAGS is used to control type-specifier parsing.
10249 If IS_DECLARATION is TRUE, then this type-specifier is appearing
10250 in a decl-specifier-seq.
10252 If DECLARES_CLASS_OR_ENUM is non-NULL, and the type-specifier is a
10253 class-specifier, enum-specifier, or elaborated-type-specifier, then
10254 *DECLARES_CLASS_OR_ENUM is set to a nonzero value. The value is 1
10255 if a type is declared; 2 if it is defined. Otherwise, it is set to
10258 If IS_CV_QUALIFIER is non-NULL, and the type-specifier is a
10259 cv-qualifier, then IS_CV_QUALIFIER is set to TRUE. Otherwise, it
10260 is set to FALSE. */
10263 cp_parser_type_specifier (cp_parser* parser,
10264 cp_parser_flags flags,
10265 cp_decl_specifier_seq *decl_specs,
10266 bool is_declaration,
10267 int* declares_class_or_enum,
10268 bool* is_cv_qualifier)
10270 tree type_spec = NULL_TREE;
10273 cp_decl_spec ds = ds_last;
10275 /* Assume this type-specifier does not declare a new type. */
10276 if (declares_class_or_enum)
10277 *declares_class_or_enum = 0;
10278 /* And that it does not specify a cv-qualifier. */
10279 if (is_cv_qualifier)
10280 *is_cv_qualifier = false;
10281 /* Peek at the next token. */
10282 token = cp_lexer_peek_token (parser->lexer);
10284 /* If we're looking at a keyword, we can use that to guide the
10285 production we choose. */
10286 keyword = token->keyword;
10290 /* Look for the enum-specifier. */
10291 type_spec = cp_parser_enum_specifier (parser);
10292 /* If that worked, we're done. */
10295 if (declares_class_or_enum)
10296 *declares_class_or_enum = 2;
10298 cp_parser_set_decl_spec_type (decl_specs,
10300 /*user_defined_p=*/true);
10304 goto elaborated_type_specifier;
10306 /* Any of these indicate either a class-specifier, or an
10307 elaborated-type-specifier. */
10311 /* Parse tentatively so that we can back up if we don't find a
10312 class-specifier. */
10313 cp_parser_parse_tentatively (parser);
10314 /* Look for the class-specifier. */
10315 type_spec = cp_parser_class_specifier (parser);
10316 /* If that worked, we're done. */
10317 if (cp_parser_parse_definitely (parser))
10319 if (declares_class_or_enum)
10320 *declares_class_or_enum = 2;
10322 cp_parser_set_decl_spec_type (decl_specs,
10324 /*user_defined_p=*/true);
10328 /* Fall through. */
10329 elaborated_type_specifier:
10330 /* We're declaring (not defining) a class or enum. */
10331 if (declares_class_or_enum)
10332 *declares_class_or_enum = 1;
10334 /* Fall through. */
10336 /* Look for an elaborated-type-specifier. */
10338 = (cp_parser_elaborated_type_specifier
10340 decl_specs && decl_specs->specs[(int) ds_friend],
10343 cp_parser_set_decl_spec_type (decl_specs,
10345 /*user_defined_p=*/true);
10350 if (is_cv_qualifier)
10351 *is_cv_qualifier = true;
10356 if (is_cv_qualifier)
10357 *is_cv_qualifier = true;
10362 if (is_cv_qualifier)
10363 *is_cv_qualifier = true;
10367 /* The `__complex__' keyword is a GNU extension. */
10375 /* Handle simple keywords. */
10380 ++decl_specs->specs[(int)ds];
10381 decl_specs->any_specifiers_p = true;
10383 return cp_lexer_consume_token (parser->lexer)->u.value;
10386 /* If we do not already have a type-specifier, assume we are looking
10387 at a simple-type-specifier. */
10388 type_spec = cp_parser_simple_type_specifier (parser,
10392 /* If we didn't find a type-specifier, and a type-specifier was not
10393 optional in this context, issue an error message. */
10394 if (!type_spec && !(flags & CP_PARSER_FLAGS_OPTIONAL))
10396 cp_parser_error (parser, "expected type specifier");
10397 return error_mark_node;
10403 /* Parse a simple-type-specifier.
10405 simple-type-specifier:
10406 :: [opt] nested-name-specifier [opt] type-name
10407 :: [opt] nested-name-specifier template template-id
10422 simple-type-specifier:
10423 __typeof__ unary-expression
10424 __typeof__ ( type-id )
10426 Returns the indicated TYPE_DECL. If DECL_SPECS is not NULL, it is
10427 appropriately updated. */
10430 cp_parser_simple_type_specifier (cp_parser* parser,
10431 cp_decl_specifier_seq *decl_specs,
10432 cp_parser_flags flags)
10434 tree type = NULL_TREE;
10437 /* Peek at the next token. */
10438 token = cp_lexer_peek_token (parser->lexer);
10440 /* If we're looking at a keyword, things are easy. */
10441 switch (token->keyword)
10445 decl_specs->explicit_char_p = true;
10446 type = char_type_node;
10449 type = wchar_type_node;
10452 type = boolean_type_node;
10456 ++decl_specs->specs[(int) ds_short];
10457 type = short_integer_type_node;
10461 decl_specs->explicit_int_p = true;
10462 type = integer_type_node;
10466 ++decl_specs->specs[(int) ds_long];
10467 type = long_integer_type_node;
10471 ++decl_specs->specs[(int) ds_signed];
10472 type = integer_type_node;
10476 ++decl_specs->specs[(int) ds_unsigned];
10477 type = unsigned_type_node;
10480 type = float_type_node;
10483 type = double_type_node;
10486 type = void_type_node;
10490 /* Consume the `typeof' token. */
10491 cp_lexer_consume_token (parser->lexer);
10492 /* Parse the operand to `typeof'. */
10493 type = cp_parser_sizeof_operand (parser, RID_TYPEOF);
10494 /* If it is not already a TYPE, take its type. */
10495 if (!TYPE_P (type))
10496 type = finish_typeof (type);
10499 cp_parser_set_decl_spec_type (decl_specs, type,
10500 /*user_defined_p=*/true);
10508 /* If the type-specifier was for a built-in type, we're done. */
10513 /* Record the type. */
10515 && (token->keyword != RID_SIGNED
10516 && token->keyword != RID_UNSIGNED
10517 && token->keyword != RID_SHORT
10518 && token->keyword != RID_LONG))
10519 cp_parser_set_decl_spec_type (decl_specs,
10521 /*user_defined=*/false);
10523 decl_specs->any_specifiers_p = true;
10525 /* Consume the token. */
10526 id = cp_lexer_consume_token (parser->lexer)->u.value;
10528 /* There is no valid C++ program where a non-template type is
10529 followed by a "<". That usually indicates that the user thought
10530 that the type was a template. */
10531 cp_parser_check_for_invalid_template_id (parser, type);
10533 return TYPE_NAME (type);
10536 /* The type-specifier must be a user-defined type. */
10537 if (!(flags & CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES))
10542 /* Don't gobble tokens or issue error messages if this is an
10543 optional type-specifier. */
10544 if (flags & CP_PARSER_FLAGS_OPTIONAL)
10545 cp_parser_parse_tentatively (parser);
10547 /* Look for the optional `::' operator. */
10549 = (cp_parser_global_scope_opt (parser,
10550 /*current_scope_valid_p=*/false)
10552 /* Look for the nested-name specifier. */
10554 = (cp_parser_nested_name_specifier_opt (parser,
10555 /*typename_keyword_p=*/false,
10556 /*check_dependency_p=*/true,
10558 /*is_declaration=*/false)
10560 /* If we have seen a nested-name-specifier, and the next token
10561 is `template', then we are using the template-id production. */
10563 && cp_parser_optional_template_keyword (parser))
10565 /* Look for the template-id. */
10566 type = cp_parser_template_id (parser,
10567 /*template_keyword_p=*/true,
10568 /*check_dependency_p=*/true,
10569 /*is_declaration=*/false);
10570 /* If the template-id did not name a type, we are out of
10572 if (TREE_CODE (type) != TYPE_DECL)
10574 cp_parser_error (parser, "expected template-id for type");
10578 /* Otherwise, look for a type-name. */
10580 type = cp_parser_type_name (parser);
10581 /* Keep track of all name-lookups performed in class scopes. */
10585 && TREE_CODE (type) == TYPE_DECL
10586 && TREE_CODE (DECL_NAME (type)) == IDENTIFIER_NODE)
10587 maybe_note_name_used_in_class (DECL_NAME (type), type);
10588 /* If it didn't work out, we don't have a TYPE. */
10589 if ((flags & CP_PARSER_FLAGS_OPTIONAL)
10590 && !cp_parser_parse_definitely (parser))
10592 if (type && decl_specs)
10593 cp_parser_set_decl_spec_type (decl_specs, type,
10594 /*user_defined=*/true);
10597 /* If we didn't get a type-name, issue an error message. */
10598 if (!type && !(flags & CP_PARSER_FLAGS_OPTIONAL))
10600 cp_parser_error (parser, "expected type-name");
10601 return error_mark_node;
10604 /* There is no valid C++ program where a non-template type is
10605 followed by a "<". That usually indicates that the user thought
10606 that the type was a template. */
10607 if (type && type != error_mark_node)
10609 /* As a last-ditch effort, see if TYPE is an Objective-C type.
10610 If it is, then the '<'...'>' enclose protocol names rather than
10611 template arguments, and so everything is fine. */
10612 if (c_dialect_objc ()
10613 && (objc_is_id (type) || objc_is_class_name (type)))
10615 tree protos = cp_parser_objc_protocol_refs_opt (parser);
10616 tree qual_type = objc_get_protocol_qualified_type (type, protos);
10618 /* Clobber the "unqualified" type previously entered into
10619 DECL_SPECS with the new, improved protocol-qualified version. */
10621 decl_specs->type = qual_type;
10626 cp_parser_check_for_invalid_template_id (parser, TREE_TYPE (type));
10632 /* Parse a type-name.
10645 Returns a TYPE_DECL for the type. */
10648 cp_parser_type_name (cp_parser* parser)
10653 /* We can't know yet whether it is a class-name or not. */
10654 cp_parser_parse_tentatively (parser);
10655 /* Try a class-name. */
10656 type_decl = cp_parser_class_name (parser,
10657 /*typename_keyword_p=*/false,
10658 /*template_keyword_p=*/false,
10660 /*check_dependency_p=*/true,
10661 /*class_head_p=*/false,
10662 /*is_declaration=*/false);
10663 /* If it's not a class-name, keep looking. */
10664 if (!cp_parser_parse_definitely (parser))
10666 /* It must be a typedef-name or an enum-name. */
10667 identifier = cp_parser_identifier (parser);
10668 if (identifier == error_mark_node)
10669 return error_mark_node;
10671 /* Look up the type-name. */
10672 type_decl = cp_parser_lookup_name_simple (parser, identifier);
10674 if (TREE_CODE (type_decl) != TYPE_DECL
10675 && (objc_is_id (identifier) || objc_is_class_name (identifier)))
10677 /* See if this is an Objective-C type. */
10678 tree protos = cp_parser_objc_protocol_refs_opt (parser);
10679 tree type = objc_get_protocol_qualified_type (identifier, protos);
10681 type_decl = TYPE_NAME (type);
10684 /* Issue an error if we did not find a type-name. */
10685 if (TREE_CODE (type_decl) != TYPE_DECL)
10687 if (!cp_parser_simulate_error (parser))
10688 cp_parser_name_lookup_error (parser, identifier, type_decl,
10690 type_decl = error_mark_node;
10692 /* Remember that the name was used in the definition of the
10693 current class so that we can check later to see if the
10694 meaning would have been different after the class was
10695 entirely defined. */
10696 else if (type_decl != error_mark_node
10698 maybe_note_name_used_in_class (identifier, type_decl);
10705 /* Parse an elaborated-type-specifier. Note that the grammar given
10706 here incorporates the resolution to DR68.
10708 elaborated-type-specifier:
10709 class-key :: [opt] nested-name-specifier [opt] identifier
10710 class-key :: [opt] nested-name-specifier [opt] template [opt] template-id
10711 enum :: [opt] nested-name-specifier [opt] identifier
10712 typename :: [opt] nested-name-specifier identifier
10713 typename :: [opt] nested-name-specifier template [opt]
10718 elaborated-type-specifier:
10719 class-key attributes :: [opt] nested-name-specifier [opt] identifier
10720 class-key attributes :: [opt] nested-name-specifier [opt]
10721 template [opt] template-id
10722 enum attributes :: [opt] nested-name-specifier [opt] identifier
10724 If IS_FRIEND is TRUE, then this elaborated-type-specifier is being
10725 declared `friend'. If IS_DECLARATION is TRUE, then this
10726 elaborated-type-specifier appears in a decl-specifiers-seq, i.e.,
10727 something is being declared.
10729 Returns the TYPE specified. */
10732 cp_parser_elaborated_type_specifier (cp_parser* parser,
10734 bool is_declaration)
10736 enum tag_types tag_type;
10738 tree type = NULL_TREE;
10739 tree attributes = NULL_TREE;
10741 /* See if we're looking at the `enum' keyword. */
10742 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_ENUM))
10744 /* Consume the `enum' token. */
10745 cp_lexer_consume_token (parser->lexer);
10746 /* Remember that it's an enumeration type. */
10747 tag_type = enum_type;
10748 /* Parse the attributes. */
10749 attributes = cp_parser_attributes_opt (parser);
10751 /* Or, it might be `typename'. */
10752 else if (cp_lexer_next_token_is_keyword (parser->lexer,
10755 /* Consume the `typename' token. */
10756 cp_lexer_consume_token (parser->lexer);
10757 /* Remember that it's a `typename' type. */
10758 tag_type = typename_type;
10759 /* The `typename' keyword is only allowed in templates. */
10760 if (!processing_template_decl)
10761 pedwarn ("using %<typename%> outside of template");
10763 /* Otherwise it must be a class-key. */
10766 tag_type = cp_parser_class_key (parser);
10767 if (tag_type == none_type)
10768 return error_mark_node;
10769 /* Parse the attributes. */
10770 attributes = cp_parser_attributes_opt (parser);
10773 /* Look for the `::' operator. */
10774 cp_parser_global_scope_opt (parser,
10775 /*current_scope_valid_p=*/false);
10776 /* Look for the nested-name-specifier. */
10777 if (tag_type == typename_type)
10779 if (!cp_parser_nested_name_specifier (parser,
10780 /*typename_keyword_p=*/true,
10781 /*check_dependency_p=*/true,
10784 return error_mark_node;
10787 /* Even though `typename' is not present, the proposed resolution
10788 to Core Issue 180 says that in `class A<T>::B', `B' should be
10789 considered a type-name, even if `A<T>' is dependent. */
10790 cp_parser_nested_name_specifier_opt (parser,
10791 /*typename_keyword_p=*/true,
10792 /*check_dependency_p=*/true,
10795 /* For everything but enumeration types, consider a template-id.
10796 For an enumeration type, consider only a plain identifier. */
10797 if (tag_type != enum_type)
10799 bool template_p = false;
10802 /* Allow the `template' keyword. */
10803 template_p = cp_parser_optional_template_keyword (parser);
10804 /* If we didn't see `template', we don't know if there's a
10805 template-id or not. */
10807 cp_parser_parse_tentatively (parser);
10808 /* Parse the template-id. */
10809 decl = cp_parser_template_id (parser, template_p,
10810 /*check_dependency_p=*/true,
10812 /* If we didn't find a template-id, look for an ordinary
10814 if (!template_p && !cp_parser_parse_definitely (parser))
10816 /* If DECL is a TEMPLATE_ID_EXPR, and the `typename' keyword is
10817 in effect, then we must assume that, upon instantiation, the
10818 template will correspond to a class. */
10819 else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR
10820 && tag_type == typename_type)
10821 type = make_typename_type (parser->scope, decl,
10823 /*complain=*/tf_error);
10825 type = TREE_TYPE (decl);
10830 identifier = cp_parser_identifier (parser);
10832 if (identifier == error_mark_node)
10834 parser->scope = NULL_TREE;
10835 return error_mark_node;
10838 /* For a `typename', we needn't call xref_tag. */
10839 if (tag_type == typename_type
10840 && TREE_CODE (parser->scope) != NAMESPACE_DECL)
10841 return cp_parser_make_typename_type (parser, parser->scope,
10843 /* Look up a qualified name in the usual way. */
10848 decl = cp_parser_lookup_name (parser, identifier,
10850 /*is_template=*/false,
10851 /*is_namespace=*/false,
10852 /*check_dependency=*/true,
10853 /*ambiguous_decls=*/NULL);
10855 /* If we are parsing friend declaration, DECL may be a
10856 TEMPLATE_DECL tree node here. However, we need to check
10857 whether this TEMPLATE_DECL results in valid code. Consider
10858 the following example:
10861 template <class T> class C {};
10864 template <class T> friend class N::C; // #1, valid code
10866 template <class T> class Y {
10867 friend class N::C; // #2, invalid code
10870 For both case #1 and #2, we arrive at a TEMPLATE_DECL after
10871 name lookup of `N::C'. We see that friend declaration must
10872 be template for the code to be valid. Note that
10873 processing_template_decl does not work here since it is
10874 always 1 for the above two cases. */
10876 decl = (cp_parser_maybe_treat_template_as_class
10877 (decl, /*tag_name_p=*/is_friend
10878 && parser->num_template_parameter_lists));
10880 if (TREE_CODE (decl) != TYPE_DECL)
10882 cp_parser_diagnose_invalid_type_name (parser,
10885 return error_mark_node;
10888 if (TREE_CODE (TREE_TYPE (decl)) != TYPENAME_TYPE)
10890 bool allow_template = (parser->num_template_parameter_lists
10891 || DECL_SELF_REFERENCE_P (decl));
10892 type = check_elaborated_type_specifier (tag_type, decl,
10895 if (type == error_mark_node)
10896 return error_mark_node;
10899 type = TREE_TYPE (decl);
10903 /* An elaborated-type-specifier sometimes introduces a new type and
10904 sometimes names an existing type. Normally, the rule is that it
10905 introduces a new type only if there is not an existing type of
10906 the same name already in scope. For example, given:
10909 void f() { struct S s; }
10911 the `struct S' in the body of `f' is the same `struct S' as in
10912 the global scope; the existing definition is used. However, if
10913 there were no global declaration, this would introduce a new
10914 local class named `S'.
10916 An exception to this rule applies to the following code:
10918 namespace N { struct S; }
10920 Here, the elaborated-type-specifier names a new type
10921 unconditionally; even if there is already an `S' in the
10922 containing scope this declaration names a new type.
10923 This exception only applies if the elaborated-type-specifier
10924 forms the complete declaration:
10928 A declaration consisting solely of `class-key identifier ;' is
10929 either a redeclaration of the name in the current scope or a
10930 forward declaration of the identifier as a class name. It
10931 introduces the name into the current scope.
10933 We are in this situation precisely when the next token is a `;'.
10935 An exception to the exception is that a `friend' declaration does
10936 *not* name a new type; i.e., given:
10938 struct S { friend struct T; };
10940 `T' is not a new type in the scope of `S'.
10942 Also, `new struct S' or `sizeof (struct S)' never results in the
10943 definition of a new type; a new type can only be declared in a
10944 declaration context. */
10950 /* Friends have special name lookup rules. */
10951 ts = ts_within_enclosing_non_class;
10952 else if (is_declaration
10953 && cp_lexer_next_token_is (parser->lexer,
10955 /* This is a `class-key identifier ;' */
10961 (parser->num_template_parameter_lists
10962 && (cp_parser_next_token_starts_class_definition_p (parser)
10963 || cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)));
10964 /* An unqualified name was used to reference this type, so
10965 there were no qualifying templates. */
10966 if (!cp_parser_check_template_parameters (parser,
10967 /*num_templates=*/0))
10968 return error_mark_node;
10969 type = xref_tag (tag_type, identifier, ts, template_p);
10973 if (type == error_mark_node)
10974 return error_mark_node;
10976 /* Allow attributes on forward declarations of classes. */
10979 if (TREE_CODE (type) == TYPENAME_TYPE)
10980 warning (OPT_Wattributes,
10981 "attributes ignored on uninstantiated type");
10982 else if (tag_type != enum_type && CLASSTYPE_TEMPLATE_INSTANTIATION (type)
10983 && ! processing_explicit_instantiation)
10984 warning (OPT_Wattributes,
10985 "attributes ignored on template instantiation");
10986 else if (is_declaration && cp_parser_declares_only_class_p (parser))
10987 cplus_decl_attributes (&type, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE);
10989 warning (OPT_Wattributes,
10990 "attributes ignored on elaborated-type-specifier that is not a forward declaration");
10993 if (tag_type != enum_type)
10994 cp_parser_check_class_key (tag_type, type);
10996 /* A "<" cannot follow an elaborated type specifier. If that
10997 happens, the user was probably trying to form a template-id. */
10998 cp_parser_check_for_invalid_template_id (parser, type);
11003 /* Parse an enum-specifier.
11006 enum identifier [opt] { enumerator-list [opt] }
11009 enum attributes[opt] identifier [opt] { enumerator-list [opt] }
11012 Returns an ENUM_TYPE representing the enumeration, or NULL_TREE
11013 if the token stream isn't an enum-specifier after all. */
11016 cp_parser_enum_specifier (cp_parser* parser)
11022 /* Parse tentatively so that we can back up if we don't find a
11024 cp_parser_parse_tentatively (parser);
11026 /* Caller guarantees that the current token is 'enum', an identifier
11027 possibly follows, and the token after that is an opening brace.
11028 If we don't have an identifier, fabricate an anonymous name for
11029 the enumeration being defined. */
11030 cp_lexer_consume_token (parser->lexer);
11032 attributes = cp_parser_attributes_opt (parser);
11034 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
11035 identifier = cp_parser_identifier (parser);
11037 identifier = make_anon_name ();
11039 /* Look for the `{' but don't consume it yet. */
11040 if (!cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
11041 cp_parser_simulate_error (parser);
11043 if (!cp_parser_parse_definitely (parser))
11046 /* Issue an error message if type-definitions are forbidden here. */
11047 if (!cp_parser_check_type_definition (parser))
11048 type = error_mark_node;
11050 /* Create the new type. We do this before consuming the opening
11051 brace so the enum will be recorded as being on the line of its
11052 tag (or the 'enum' keyword, if there is no tag). */
11053 type = start_enum (identifier);
11055 /* Consume the opening brace. */
11056 cp_lexer_consume_token (parser->lexer);
11058 if (type == error_mark_node)
11060 cp_parser_skip_to_end_of_block_or_statement (parser);
11061 return error_mark_node;
11064 /* If the next token is not '}', then there are some enumerators. */
11065 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_BRACE))
11066 cp_parser_enumerator_list (parser, type);
11068 /* Consume the final '}'. */
11069 cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'");
11071 /* Look for trailing attributes to apply to this enumeration, and
11072 apply them if appropriate. */
11073 if (cp_parser_allow_gnu_extensions_p (parser))
11075 tree trailing_attr = cp_parser_attributes_opt (parser);
11076 cplus_decl_attributes (&type,
11078 (int) ATTR_FLAG_TYPE_IN_PLACE);
11081 /* Finish up the enumeration. */
11082 finish_enum (type);
11087 /* Parse an enumerator-list. The enumerators all have the indicated
11091 enumerator-definition
11092 enumerator-list , enumerator-definition */
11095 cp_parser_enumerator_list (cp_parser* parser, tree type)
11099 /* Parse an enumerator-definition. */
11100 cp_parser_enumerator_definition (parser, type);
11102 /* If the next token is not a ',', we've reached the end of
11104 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
11106 /* Otherwise, consume the `,' and keep going. */
11107 cp_lexer_consume_token (parser->lexer);
11108 /* If the next token is a `}', there is a trailing comma. */
11109 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
11111 if (pedantic && !in_system_header)
11112 pedwarn ("comma at end of enumerator list");
11118 /* Parse an enumerator-definition. The enumerator has the indicated
11121 enumerator-definition:
11123 enumerator = constant-expression
11129 cp_parser_enumerator_definition (cp_parser* parser, tree type)
11134 /* Look for the identifier. */
11135 identifier = cp_parser_identifier (parser);
11136 if (identifier == error_mark_node)
11139 /* If the next token is an '=', then there is an explicit value. */
11140 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
11142 /* Consume the `=' token. */
11143 cp_lexer_consume_token (parser->lexer);
11144 /* Parse the value. */
11145 value = cp_parser_constant_expression (parser,
11146 /*allow_non_constant_p=*/false,
11152 /* Create the enumerator. */
11153 build_enumerator (identifier, value, type);
11156 /* Parse a namespace-name.
11159 original-namespace-name
11162 Returns the NAMESPACE_DECL for the namespace. */
11165 cp_parser_namespace_name (cp_parser* parser)
11168 tree namespace_decl;
11170 /* Get the name of the namespace. */
11171 identifier = cp_parser_identifier (parser);
11172 if (identifier == error_mark_node)
11173 return error_mark_node;
11175 /* Look up the identifier in the currently active scope. Look only
11176 for namespaces, due to:
11178 [basic.lookup.udir]
11180 When looking up a namespace-name in a using-directive or alias
11181 definition, only namespace names are considered.
11185 [basic.lookup.qual]
11187 During the lookup of a name preceding the :: scope resolution
11188 operator, object, function, and enumerator names are ignored.
11190 (Note that cp_parser_class_or_namespace_name only calls this
11191 function if the token after the name is the scope resolution
11193 namespace_decl = cp_parser_lookup_name (parser, identifier,
11195 /*is_template=*/false,
11196 /*is_namespace=*/true,
11197 /*check_dependency=*/true,
11198 /*ambiguous_decls=*/NULL);
11199 /* If it's not a namespace, issue an error. */
11200 if (namespace_decl == error_mark_node
11201 || TREE_CODE (namespace_decl) != NAMESPACE_DECL)
11203 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
11204 error ("%qD is not a namespace-name", identifier);
11205 cp_parser_error (parser, "expected namespace-name");
11206 namespace_decl = error_mark_node;
11209 return namespace_decl;
11212 /* Parse a namespace-definition.
11214 namespace-definition:
11215 named-namespace-definition
11216 unnamed-namespace-definition
11218 named-namespace-definition:
11219 original-namespace-definition
11220 extension-namespace-definition
11222 original-namespace-definition:
11223 namespace identifier { namespace-body }
11225 extension-namespace-definition:
11226 namespace original-namespace-name { namespace-body }
11228 unnamed-namespace-definition:
11229 namespace { namespace-body } */
11232 cp_parser_namespace_definition (cp_parser* parser)
11234 tree identifier, attribs;
11236 /* Look for the `namespace' keyword. */
11237 cp_parser_require_keyword (parser, RID_NAMESPACE, "`namespace'");
11239 /* Get the name of the namespace. We do not attempt to distinguish
11240 between an original-namespace-definition and an
11241 extension-namespace-definition at this point. The semantic
11242 analysis routines are responsible for that. */
11243 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
11244 identifier = cp_parser_identifier (parser);
11246 identifier = NULL_TREE;
11248 /* Parse any specified attributes. */
11249 attribs = cp_parser_attributes_opt (parser);
11251 /* Look for the `{' to start the namespace. */
11252 cp_parser_require (parser, CPP_OPEN_BRACE, "`{'");
11253 /* Start the namespace. */
11254 push_namespace_with_attribs (identifier, attribs);
11255 /* Parse the body of the namespace. */
11256 cp_parser_namespace_body (parser);
11257 /* Finish the namespace. */
11259 /* Look for the final `}'. */
11260 cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'");
11263 /* Parse a namespace-body.
11266 declaration-seq [opt] */
11269 cp_parser_namespace_body (cp_parser* parser)
11271 cp_parser_declaration_seq_opt (parser);
11274 /* Parse a namespace-alias-definition.
11276 namespace-alias-definition:
11277 namespace identifier = qualified-namespace-specifier ; */
11280 cp_parser_namespace_alias_definition (cp_parser* parser)
11283 tree namespace_specifier;
11285 /* Look for the `namespace' keyword. */
11286 cp_parser_require_keyword (parser, RID_NAMESPACE, "`namespace'");
11287 /* Look for the identifier. */
11288 identifier = cp_parser_identifier (parser);
11289 if (identifier == error_mark_node)
11291 /* Look for the `=' token. */
11292 if (!cp_parser_uncommitted_to_tentative_parse_p (parser)
11293 && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
11295 error ("%<namespace%> definition is not allowed here");
11296 /* Skip the definition. */
11297 cp_lexer_consume_token (parser->lexer);
11298 cp_parser_skip_to_closing_brace (parser);
11299 cp_lexer_consume_token (parser->lexer);
11302 cp_parser_require (parser, CPP_EQ, "`='");
11303 /* Look for the qualified-namespace-specifier. */
11304 namespace_specifier
11305 = cp_parser_qualified_namespace_specifier (parser);
11306 /* Look for the `;' token. */
11307 cp_parser_require (parser, CPP_SEMICOLON, "`;'");
11309 /* Register the alias in the symbol table. */
11310 do_namespace_alias (identifier, namespace_specifier);
11313 /* Parse a qualified-namespace-specifier.
11315 qualified-namespace-specifier:
11316 :: [opt] nested-name-specifier [opt] namespace-name
11318 Returns a NAMESPACE_DECL corresponding to the specified
11322 cp_parser_qualified_namespace_specifier (cp_parser* parser)
11324 /* Look for the optional `::'. */
11325 cp_parser_global_scope_opt (parser,
11326 /*current_scope_valid_p=*/false);
11328 /* Look for the optional nested-name-specifier. */
11329 cp_parser_nested_name_specifier_opt (parser,
11330 /*typename_keyword_p=*/false,
11331 /*check_dependency_p=*/true,
11333 /*is_declaration=*/true);
11335 return cp_parser_namespace_name (parser);
11338 /* Parse a using-declaration, or, if ACCESS_DECLARATION_P is true, an
11339 access declaration.
11342 using typename [opt] :: [opt] nested-name-specifier unqualified-id ;
11343 using :: unqualified-id ;
11345 access-declaration:
11351 cp_parser_using_declaration (cp_parser* parser,
11352 bool access_declaration_p)
11355 bool typename_p = false;
11356 bool global_scope_p;
11361 if (access_declaration_p)
11362 cp_parser_parse_tentatively (parser);
11365 /* Look for the `using' keyword. */
11366 cp_parser_require_keyword (parser, RID_USING, "`using'");
11368 /* Peek at the next token. */
11369 token = cp_lexer_peek_token (parser->lexer);
11370 /* See if it's `typename'. */
11371 if (token->keyword == RID_TYPENAME)
11373 /* Remember that we've seen it. */
11375 /* Consume the `typename' token. */
11376 cp_lexer_consume_token (parser->lexer);
11380 /* Look for the optional global scope qualification. */
11382 = (cp_parser_global_scope_opt (parser,
11383 /*current_scope_valid_p=*/false)
11386 /* If we saw `typename', or didn't see `::', then there must be a
11387 nested-name-specifier present. */
11388 if (typename_p || !global_scope_p)
11389 qscope = cp_parser_nested_name_specifier (parser, typename_p,
11390 /*check_dependency_p=*/true,
11392 /*is_declaration=*/true);
11393 /* Otherwise, we could be in either of the two productions. In that
11394 case, treat the nested-name-specifier as optional. */
11396 qscope = cp_parser_nested_name_specifier_opt (parser,
11397 /*typename_keyword_p=*/false,
11398 /*check_dependency_p=*/true,
11400 /*is_declaration=*/true);
11402 qscope = global_namespace;
11404 if (access_declaration_p && cp_parser_error_occurred (parser))
11405 /* Something has already gone wrong; there's no need to parse
11406 further. Since an error has occurred, the return value of
11407 cp_parser_parse_definitely will be false, as required. */
11408 return cp_parser_parse_definitely (parser);
11410 /* Parse the unqualified-id. */
11411 identifier = cp_parser_unqualified_id (parser,
11412 /*template_keyword_p=*/false,
11413 /*check_dependency_p=*/true,
11414 /*declarator_p=*/true,
11415 /*optional_p=*/false);
11417 if (access_declaration_p)
11419 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
11420 cp_parser_simulate_error (parser);
11421 if (!cp_parser_parse_definitely (parser))
11425 /* The function we call to handle a using-declaration is different
11426 depending on what scope we are in. */
11427 if (qscope == error_mark_node || identifier == error_mark_node)
11429 else if (TREE_CODE (identifier) != IDENTIFIER_NODE
11430 && TREE_CODE (identifier) != BIT_NOT_EXPR)
11431 /* [namespace.udecl]
11433 A using declaration shall not name a template-id. */
11434 error ("a template-id may not appear in a using-declaration");
11437 if (at_class_scope_p ())
11439 /* Create the USING_DECL. */
11440 decl = do_class_using_decl (parser->scope, identifier);
11441 /* Add it to the list of members in this class. */
11442 finish_member_declaration (decl);
11446 decl = cp_parser_lookup_name_simple (parser, identifier);
11447 if (decl == error_mark_node)
11448 cp_parser_name_lookup_error (parser, identifier, decl, NULL);
11449 else if (!at_namespace_scope_p ())
11450 do_local_using_decl (decl, qscope, identifier);
11452 do_toplevel_using_decl (decl, qscope, identifier);
11456 /* Look for the final `;'. */
11457 cp_parser_require (parser, CPP_SEMICOLON, "`;'");
11462 /* Parse a using-directive.
11465 using namespace :: [opt] nested-name-specifier [opt]
11466 namespace-name ; */
11469 cp_parser_using_directive (cp_parser* parser)
11471 tree namespace_decl;
11474 /* Look for the `using' keyword. */
11475 cp_parser_require_keyword (parser, RID_USING, "`using'");
11476 /* And the `namespace' keyword. */
11477 cp_parser_require_keyword (parser, RID_NAMESPACE, "`namespace'");
11478 /* Look for the optional `::' operator. */
11479 cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false);
11480 /* And the optional nested-name-specifier. */
11481 cp_parser_nested_name_specifier_opt (parser,
11482 /*typename_keyword_p=*/false,
11483 /*check_dependency_p=*/true,
11485 /*is_declaration=*/true);
11486 /* Get the namespace being used. */
11487 namespace_decl = cp_parser_namespace_name (parser);
11488 /* And any specified attributes. */
11489 attribs = cp_parser_attributes_opt (parser);
11490 /* Update the symbol table. */
11491 parse_using_directive (namespace_decl, attribs);
11492 /* Look for the final `;'. */
11493 cp_parser_require (parser, CPP_SEMICOLON, "`;'");
11496 /* Parse an asm-definition.
11499 asm ( string-literal ) ;
11504 asm volatile [opt] ( string-literal ) ;
11505 asm volatile [opt] ( string-literal : asm-operand-list [opt] ) ;
11506 asm volatile [opt] ( string-literal : asm-operand-list [opt]
11507 : asm-operand-list [opt] ) ;
11508 asm volatile [opt] ( string-literal : asm-operand-list [opt]
11509 : asm-operand-list [opt]
11510 : asm-operand-list [opt] ) ; */
11513 cp_parser_asm_definition (cp_parser* parser)
11516 tree outputs = NULL_TREE;
11517 tree inputs = NULL_TREE;
11518 tree clobbers = NULL_TREE;
11520 bool volatile_p = false;
11521 bool extended_p = false;
11523 /* Look for the `asm' keyword. */
11524 cp_parser_require_keyword (parser, RID_ASM, "`asm'");
11525 /* See if the next token is `volatile'. */
11526 if (cp_parser_allow_gnu_extensions_p (parser)
11527 && cp_lexer_next_token_is_keyword (parser->lexer, RID_VOLATILE))
11529 /* Remember that we saw the `volatile' keyword. */
11531 /* Consume the token. */
11532 cp_lexer_consume_token (parser->lexer);
11534 /* Look for the opening `('. */
11535 if (!cp_parser_require (parser, CPP_OPEN_PAREN, "`('"))
11537 /* Look for the string. */
11538 string = cp_parser_string_literal (parser, false, false);
11539 if (string == error_mark_node)
11541 cp_parser_skip_to_closing_parenthesis (parser, true, false,
11542 /*consume_paren=*/true);
11546 /* If we're allowing GNU extensions, check for the extended assembly
11547 syntax. Unfortunately, the `:' tokens need not be separated by
11548 a space in C, and so, for compatibility, we tolerate that here
11549 too. Doing that means that we have to treat the `::' operator as
11551 if (cp_parser_allow_gnu_extensions_p (parser)
11552 && parser->in_function_body
11553 && (cp_lexer_next_token_is (parser->lexer, CPP_COLON)
11554 || cp_lexer_next_token_is (parser->lexer, CPP_SCOPE)))
11556 bool inputs_p = false;
11557 bool clobbers_p = false;
11559 /* The extended syntax was used. */
11562 /* Look for outputs. */
11563 if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
11565 /* Consume the `:'. */
11566 cp_lexer_consume_token (parser->lexer);
11567 /* Parse the output-operands. */
11568 if (cp_lexer_next_token_is_not (parser->lexer,
11570 && cp_lexer_next_token_is_not (parser->lexer,
11572 && cp_lexer_next_token_is_not (parser->lexer,
11574 outputs = cp_parser_asm_operand_list (parser);
11576 /* If the next token is `::', there are no outputs, and the
11577 next token is the beginning of the inputs. */
11578 else if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
11579 /* The inputs are coming next. */
11582 /* Look for inputs. */
11584 || cp_lexer_next_token_is (parser->lexer, CPP_COLON))
11586 /* Consume the `:' or `::'. */
11587 cp_lexer_consume_token (parser->lexer);
11588 /* Parse the output-operands. */
11589 if (cp_lexer_next_token_is_not (parser->lexer,
11591 && cp_lexer_next_token_is_not (parser->lexer,
11593 inputs = cp_parser_asm_operand_list (parser);
11595 else if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
11596 /* The clobbers are coming next. */
11599 /* Look for clobbers. */
11601 || cp_lexer_next_token_is (parser->lexer, CPP_COLON))
11603 /* Consume the `:' or `::'. */
11604 cp_lexer_consume_token (parser->lexer);
11605 /* Parse the clobbers. */
11606 if (cp_lexer_next_token_is_not (parser->lexer,
11608 clobbers = cp_parser_asm_clobber_list (parser);
11611 /* Look for the closing `)'. */
11612 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
11613 cp_parser_skip_to_closing_parenthesis (parser, true, false,
11614 /*consume_paren=*/true);
11615 cp_parser_require (parser, CPP_SEMICOLON, "`;'");
11617 /* Create the ASM_EXPR. */
11618 if (parser->in_function_body)
11620 asm_stmt = finish_asm_stmt (volatile_p, string, outputs,
11622 /* If the extended syntax was not used, mark the ASM_EXPR. */
11625 tree temp = asm_stmt;
11626 if (TREE_CODE (temp) == CLEANUP_POINT_EXPR)
11627 temp = TREE_OPERAND (temp, 0);
11629 ASM_INPUT_P (temp) = 1;
11633 cgraph_add_asm_node (string);
11636 /* Declarators [gram.dcl.decl] */
11638 /* Parse an init-declarator.
11641 declarator initializer [opt]
11646 declarator asm-specification [opt] attributes [opt] initializer [opt]
11648 function-definition:
11649 decl-specifier-seq [opt] declarator ctor-initializer [opt]
11651 decl-specifier-seq [opt] declarator function-try-block
11655 function-definition:
11656 __extension__ function-definition
11658 The DECL_SPECIFIERS apply to this declarator. Returns a
11659 representation of the entity declared. If MEMBER_P is TRUE, then
11660 this declarator appears in a class scope. The new DECL created by
11661 this declarator is returned.
11663 The CHECKS are access checks that should be performed once we know
11664 what entity is being declared (and, therefore, what classes have
11667 If FUNCTION_DEFINITION_ALLOWED_P then we handle the declarator and
11668 for a function-definition here as well. If the declarator is a
11669 declarator for a function-definition, *FUNCTION_DEFINITION_P will
11670 be TRUE upon return. By that point, the function-definition will
11671 have been completely parsed.
11673 FUNCTION_DEFINITION_P may be NULL if FUNCTION_DEFINITION_ALLOWED_P
11677 cp_parser_init_declarator (cp_parser* parser,
11678 cp_decl_specifier_seq *decl_specifiers,
11679 VEC (deferred_access_check,gc)* checks,
11680 bool function_definition_allowed_p,
11682 int declares_class_or_enum,
11683 bool* function_definition_p)
11686 cp_declarator *declarator;
11687 tree prefix_attributes;
11689 tree asm_specification;
11691 tree decl = NULL_TREE;
11693 bool is_initialized;
11694 /* Only valid if IS_INITIALIZED is true. In that case, CPP_EQ if
11695 initialized with "= ..", CPP_OPEN_PAREN if initialized with
11697 enum cpp_ttype initialization_kind;
11698 bool is_parenthesized_init = false;
11699 bool is_non_constant_init;
11700 int ctor_dtor_or_conv_p;
11702 tree pushed_scope = NULL;
11704 /* Gather the attributes that were provided with the
11705 decl-specifiers. */
11706 prefix_attributes = decl_specifiers->attributes;
11708 /* Assume that this is not the declarator for a function
11710 if (function_definition_p)
11711 *function_definition_p = false;
11713 /* Defer access checks while parsing the declarator; we cannot know
11714 what names are accessible until we know what is being
11716 resume_deferring_access_checks ();
11718 /* Parse the declarator. */
11720 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
11721 &ctor_dtor_or_conv_p,
11722 /*parenthesized_p=*/NULL,
11723 /*member_p=*/false);
11724 /* Gather up the deferred checks. */
11725 stop_deferring_access_checks ();
11727 /* If the DECLARATOR was erroneous, there's no need to go
11729 if (declarator == cp_error_declarator)
11730 return error_mark_node;
11732 /* Check that the number of template-parameter-lists is OK. */
11733 if (!cp_parser_check_declarator_template_parameters (parser, declarator))
11734 return error_mark_node;
11736 if (declares_class_or_enum & 2)
11737 cp_parser_check_for_definition_in_return_type (declarator,
11738 decl_specifiers->type);
11740 /* Figure out what scope the entity declared by the DECLARATOR is
11741 located in. `grokdeclarator' sometimes changes the scope, so
11742 we compute it now. */
11743 scope = get_scope_of_declarator (declarator);
11745 /* If we're allowing GNU extensions, look for an asm-specification
11747 if (cp_parser_allow_gnu_extensions_p (parser))
11749 /* Look for an asm-specification. */
11750 asm_specification = cp_parser_asm_specification_opt (parser);
11751 /* And attributes. */
11752 attributes = cp_parser_attributes_opt (parser);
11756 asm_specification = NULL_TREE;
11757 attributes = NULL_TREE;
11760 /* Peek at the next token. */
11761 token = cp_lexer_peek_token (parser->lexer);
11762 /* Check to see if the token indicates the start of a
11763 function-definition. */
11764 if (cp_parser_token_starts_function_definition_p (token))
11766 if (!function_definition_allowed_p)
11768 /* If a function-definition should not appear here, issue an
11770 cp_parser_error (parser,
11771 "a function-definition is not allowed here");
11772 return error_mark_node;
11776 /* Neither attributes nor an asm-specification are allowed
11777 on a function-definition. */
11778 if (asm_specification)
11779 error ("an asm-specification is not allowed on a function-definition");
11781 error ("attributes are not allowed on a function-definition");
11782 /* This is a function-definition. */
11783 *function_definition_p = true;
11785 /* Parse the function definition. */
11787 decl = cp_parser_save_member_function_body (parser,
11790 prefix_attributes);
11793 = (cp_parser_function_definition_from_specifiers_and_declarator
11794 (parser, decl_specifiers, prefix_attributes, declarator));
11802 Only in function declarations for constructors, destructors, and
11803 type conversions can the decl-specifier-seq be omitted.
11805 We explicitly postpone this check past the point where we handle
11806 function-definitions because we tolerate function-definitions
11807 that are missing their return types in some modes. */
11808 if (!decl_specifiers->any_specifiers_p && ctor_dtor_or_conv_p <= 0)
11810 cp_parser_error (parser,
11811 "expected constructor, destructor, or type conversion");
11812 return error_mark_node;
11815 /* An `=' or an `(' indicates an initializer. */
11816 if (token->type == CPP_EQ
11817 || token->type == CPP_OPEN_PAREN)
11819 is_initialized = true;
11820 initialization_kind = token->type;
11824 /* If the init-declarator isn't initialized and isn't followed by a
11825 `,' or `;', it's not a valid init-declarator. */
11826 if (token->type != CPP_COMMA
11827 && token->type != CPP_SEMICOLON)
11829 cp_parser_error (parser, "expected initializer");
11830 return error_mark_node;
11832 is_initialized = false;
11833 initialization_kind = CPP_EOF;
11836 /* Because start_decl has side-effects, we should only call it if we
11837 know we're going ahead. By this point, we know that we cannot
11838 possibly be looking at any other construct. */
11839 cp_parser_commit_to_tentative_parse (parser);
11841 /* If the decl specifiers were bad, issue an error now that we're
11842 sure this was intended to be a declarator. Then continue
11843 declaring the variable(s), as int, to try to cut down on further
11845 if (decl_specifiers->any_specifiers_p
11846 && decl_specifiers->type == error_mark_node)
11848 cp_parser_error (parser, "invalid type in declaration");
11849 decl_specifiers->type = integer_type_node;
11852 /* Check to see whether or not this declaration is a friend. */
11853 friend_p = cp_parser_friend_p (decl_specifiers);
11855 /* Enter the newly declared entry in the symbol table. If we're
11856 processing a declaration in a class-specifier, we wait until
11857 after processing the initializer. */
11860 if (parser->in_unbraced_linkage_specification_p)
11861 decl_specifiers->storage_class = sc_extern;
11862 decl = start_decl (declarator, decl_specifiers,
11863 is_initialized, attributes, prefix_attributes,
11867 /* Enter the SCOPE. That way unqualified names appearing in the
11868 initializer will be looked up in SCOPE. */
11869 pushed_scope = push_scope (scope);
11871 /* Perform deferred access control checks, now that we know in which
11872 SCOPE the declared entity resides. */
11873 if (!member_p && decl)
11875 tree saved_current_function_decl = NULL_TREE;
11877 /* If the entity being declared is a function, pretend that we
11878 are in its scope. If it is a `friend', it may have access to
11879 things that would not otherwise be accessible. */
11880 if (TREE_CODE (decl) == FUNCTION_DECL)
11882 saved_current_function_decl = current_function_decl;
11883 current_function_decl = decl;
11886 /* Perform access checks for template parameters. */
11887 cp_parser_perform_template_parameter_access_checks (checks);
11889 /* Perform the access control checks for the declarator and the
11890 the decl-specifiers. */
11891 perform_deferred_access_checks ();
11893 /* Restore the saved value. */
11894 if (TREE_CODE (decl) == FUNCTION_DECL)
11895 current_function_decl = saved_current_function_decl;
11898 /* Parse the initializer. */
11899 initializer = NULL_TREE;
11900 is_parenthesized_init = false;
11901 is_non_constant_init = true;
11902 if (is_initialized)
11904 if (function_declarator_p (declarator))
11906 if (initialization_kind == CPP_EQ)
11907 initializer = cp_parser_pure_specifier (parser);
11910 /* If the declaration was erroneous, we don't really
11911 know what the user intended, so just silently
11912 consume the initializer. */
11913 if (decl != error_mark_node)
11914 error ("initializer provided for function");
11915 cp_parser_skip_to_closing_parenthesis (parser,
11916 /*recovering=*/true,
11917 /*or_comma=*/false,
11918 /*consume_paren=*/true);
11922 initializer = cp_parser_initializer (parser,
11923 &is_parenthesized_init,
11924 &is_non_constant_init);
11927 /* The old parser allows attributes to appear after a parenthesized
11928 initializer. Mark Mitchell proposed removing this functionality
11929 on the GCC mailing lists on 2002-08-13. This parser accepts the
11930 attributes -- but ignores them. */
11931 if (cp_parser_allow_gnu_extensions_p (parser) && is_parenthesized_init)
11932 if (cp_parser_attributes_opt (parser))
11933 warning (OPT_Wattributes,
11934 "attributes after parenthesized initializer ignored");
11936 /* For an in-class declaration, use `grokfield' to create the
11942 pop_scope (pushed_scope);
11943 pushed_scope = false;
11945 decl = grokfield (declarator, decl_specifiers,
11946 initializer, !is_non_constant_init,
11947 /*asmspec=*/NULL_TREE,
11948 prefix_attributes);
11949 if (decl && TREE_CODE (decl) == FUNCTION_DECL)
11950 cp_parser_save_default_args (parser, decl);
11953 /* Finish processing the declaration. But, skip friend
11955 if (!friend_p && decl && decl != error_mark_node)
11957 cp_finish_decl (decl,
11958 initializer, !is_non_constant_init,
11960 /* If the initializer is in parentheses, then this is
11961 a direct-initialization, which means that an
11962 `explicit' constructor is OK. Otherwise, an
11963 `explicit' constructor cannot be used. */
11964 ((is_parenthesized_init || !is_initialized)
11965 ? 0 : LOOKUP_ONLYCONVERTING));
11967 else if (flag_cpp0x && friend_p && decl && TREE_CODE (decl) == FUNCTION_DECL)
11968 /* Core issue #226 (C++0x only): A default template-argument
11969 shall not be specified in a friend class template
11971 check_default_tmpl_args (decl, current_template_parms, /*is_primary=*/1,
11972 /*is_partial=*/0, /*is_friend_decl=*/1);
11974 if (!friend_p && pushed_scope)
11975 pop_scope (pushed_scope);
11980 /* Parse a declarator.
11984 ptr-operator declarator
11986 abstract-declarator:
11987 ptr-operator abstract-declarator [opt]
11988 direct-abstract-declarator
11993 attributes [opt] direct-declarator
11994 attributes [opt] ptr-operator declarator
11996 abstract-declarator:
11997 attributes [opt] ptr-operator abstract-declarator [opt]
11998 attributes [opt] direct-abstract-declarator
12000 If CTOR_DTOR_OR_CONV_P is not NULL, *CTOR_DTOR_OR_CONV_P is used to
12001 detect constructor, destructor or conversion operators. It is set
12002 to -1 if the declarator is a name, and +1 if it is a
12003 function. Otherwise it is set to zero. Usually you just want to
12004 test for >0, but internally the negative value is used.
12006 (The reason for CTOR_DTOR_OR_CONV_P is that a declaration must have
12007 a decl-specifier-seq unless it declares a constructor, destructor,
12008 or conversion. It might seem that we could check this condition in
12009 semantic analysis, rather than parsing, but that makes it difficult
12010 to handle something like `f()'. We want to notice that there are
12011 no decl-specifiers, and therefore realize that this is an
12012 expression, not a declaration.)
12014 If PARENTHESIZED_P is non-NULL, *PARENTHESIZED_P is set to true iff
12015 the declarator is a direct-declarator of the form "(...)".
12017 MEMBER_P is true iff this declarator is a member-declarator. */
12019 static cp_declarator *
12020 cp_parser_declarator (cp_parser* parser,
12021 cp_parser_declarator_kind dcl_kind,
12022 int* ctor_dtor_or_conv_p,
12023 bool* parenthesized_p,
12027 cp_declarator *declarator;
12028 enum tree_code code;
12029 cp_cv_quals cv_quals;
12031 tree attributes = NULL_TREE;
12033 /* Assume this is not a constructor, destructor, or type-conversion
12035 if (ctor_dtor_or_conv_p)
12036 *ctor_dtor_or_conv_p = 0;
12038 if (cp_parser_allow_gnu_extensions_p (parser))
12039 attributes = cp_parser_attributes_opt (parser);
12041 /* Peek at the next token. */
12042 token = cp_lexer_peek_token (parser->lexer);
12044 /* Check for the ptr-operator production. */
12045 cp_parser_parse_tentatively (parser);
12046 /* Parse the ptr-operator. */
12047 code = cp_parser_ptr_operator (parser,
12050 /* If that worked, then we have a ptr-operator. */
12051 if (cp_parser_parse_definitely (parser))
12053 /* If a ptr-operator was found, then this declarator was not
12055 if (parenthesized_p)
12056 *parenthesized_p = true;
12057 /* The dependent declarator is optional if we are parsing an
12058 abstract-declarator. */
12059 if (dcl_kind != CP_PARSER_DECLARATOR_NAMED)
12060 cp_parser_parse_tentatively (parser);
12062 /* Parse the dependent declarator. */
12063 declarator = cp_parser_declarator (parser, dcl_kind,
12064 /*ctor_dtor_or_conv_p=*/NULL,
12065 /*parenthesized_p=*/NULL,
12066 /*member_p=*/false);
12068 /* If we are parsing an abstract-declarator, we must handle the
12069 case where the dependent declarator is absent. */
12070 if (dcl_kind != CP_PARSER_DECLARATOR_NAMED
12071 && !cp_parser_parse_definitely (parser))
12074 /* Build the representation of the ptr-operator. */
12076 declarator = make_ptrmem_declarator (cv_quals,
12079 else if (code == INDIRECT_REF)
12080 declarator = make_pointer_declarator (cv_quals, declarator);
12082 declarator = make_reference_declarator (cv_quals, declarator);
12084 /* Everything else is a direct-declarator. */
12087 if (parenthesized_p)
12088 *parenthesized_p = cp_lexer_next_token_is (parser->lexer,
12090 declarator = cp_parser_direct_declarator (parser, dcl_kind,
12091 ctor_dtor_or_conv_p,
12095 if (attributes && declarator && declarator != cp_error_declarator)
12096 declarator->attributes = attributes;
12101 /* Parse a direct-declarator or direct-abstract-declarator.
12105 direct-declarator ( parameter-declaration-clause )
12106 cv-qualifier-seq [opt]
12107 exception-specification [opt]
12108 direct-declarator [ constant-expression [opt] ]
12111 direct-abstract-declarator:
12112 direct-abstract-declarator [opt]
12113 ( parameter-declaration-clause )
12114 cv-qualifier-seq [opt]
12115 exception-specification [opt]
12116 direct-abstract-declarator [opt] [ constant-expression [opt] ]
12117 ( abstract-declarator )
12119 Returns a representation of the declarator. DCL_KIND is
12120 CP_PARSER_DECLARATOR_ABSTRACT, if we are parsing a
12121 direct-abstract-declarator. It is CP_PARSER_DECLARATOR_NAMED, if
12122 we are parsing a direct-declarator. It is
12123 CP_PARSER_DECLARATOR_EITHER, if we can accept either - in the case
12124 of ambiguity we prefer an abstract declarator, as per
12125 [dcl.ambig.res]. CTOR_DTOR_OR_CONV_P and MEMBER_P are as for
12126 cp_parser_declarator. */
12128 static cp_declarator *
12129 cp_parser_direct_declarator (cp_parser* parser,
12130 cp_parser_declarator_kind dcl_kind,
12131 int* ctor_dtor_or_conv_p,
12135 cp_declarator *declarator = NULL;
12136 tree scope = NULL_TREE;
12137 bool saved_default_arg_ok_p = parser->default_arg_ok_p;
12138 bool saved_in_declarator_p = parser->in_declarator_p;
12140 tree pushed_scope = NULL_TREE;
12144 /* Peek at the next token. */
12145 token = cp_lexer_peek_token (parser->lexer);
12146 if (token->type == CPP_OPEN_PAREN)
12148 /* This is either a parameter-declaration-clause, or a
12149 parenthesized declarator. When we know we are parsing a
12150 named declarator, it must be a parenthesized declarator
12151 if FIRST is true. For instance, `(int)' is a
12152 parameter-declaration-clause, with an omitted
12153 direct-abstract-declarator. But `((*))', is a
12154 parenthesized abstract declarator. Finally, when T is a
12155 template parameter `(T)' is a
12156 parameter-declaration-clause, and not a parenthesized
12159 We first try and parse a parameter-declaration-clause,
12160 and then try a nested declarator (if FIRST is true).
12162 It is not an error for it not to be a
12163 parameter-declaration-clause, even when FIRST is
12169 The first is the declaration of a function while the
12170 second is a the definition of a variable, including its
12173 Having seen only the parenthesis, we cannot know which of
12174 these two alternatives should be selected. Even more
12175 complex are examples like:
12180 The former is a function-declaration; the latter is a
12181 variable initialization.
12183 Thus again, we try a parameter-declaration-clause, and if
12184 that fails, we back out and return. */
12186 if (!first || dcl_kind != CP_PARSER_DECLARATOR_NAMED)
12188 cp_parameter_declarator *params;
12189 unsigned saved_num_template_parameter_lists;
12191 /* In a member-declarator, the only valid interpretation
12192 of a parenthesis is the start of a
12193 parameter-declaration-clause. (It is invalid to
12194 initialize a static data member with a parenthesized
12195 initializer; only the "=" form of initialization is
12198 cp_parser_parse_tentatively (parser);
12200 /* Consume the `('. */
12201 cp_lexer_consume_token (parser->lexer);
12204 /* If this is going to be an abstract declarator, we're
12205 in a declarator and we can't have default args. */
12206 parser->default_arg_ok_p = false;
12207 parser->in_declarator_p = true;
12210 /* Inside the function parameter list, surrounding
12211 template-parameter-lists do not apply. */
12212 saved_num_template_parameter_lists
12213 = parser->num_template_parameter_lists;
12214 parser->num_template_parameter_lists = 0;
12216 /* Parse the parameter-declaration-clause. */
12217 params = cp_parser_parameter_declaration_clause (parser);
12219 parser->num_template_parameter_lists
12220 = saved_num_template_parameter_lists;
12222 /* If all went well, parse the cv-qualifier-seq and the
12223 exception-specification. */
12224 if (member_p || cp_parser_parse_definitely (parser))
12226 cp_cv_quals cv_quals;
12227 tree exception_specification;
12229 if (ctor_dtor_or_conv_p)
12230 *ctor_dtor_or_conv_p = *ctor_dtor_or_conv_p < 0;
12232 /* Consume the `)'. */
12233 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
12235 /* Parse the cv-qualifier-seq. */
12236 cv_quals = cp_parser_cv_qualifier_seq_opt (parser);
12237 /* And the exception-specification. */
12238 exception_specification
12239 = cp_parser_exception_specification_opt (parser);
12241 /* Create the function-declarator. */
12242 declarator = make_call_declarator (declarator,
12245 exception_specification);
12246 /* Any subsequent parameter lists are to do with
12247 return type, so are not those of the declared
12249 parser->default_arg_ok_p = false;
12251 /* Repeat the main loop. */
12256 /* If this is the first, we can try a parenthesized
12260 bool saved_in_type_id_in_expr_p;
12262 parser->default_arg_ok_p = saved_default_arg_ok_p;
12263 parser->in_declarator_p = saved_in_declarator_p;
12265 /* Consume the `('. */
12266 cp_lexer_consume_token (parser->lexer);
12267 /* Parse the nested declarator. */
12268 saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
12269 parser->in_type_id_in_expr_p = true;
12271 = cp_parser_declarator (parser, dcl_kind, ctor_dtor_or_conv_p,
12272 /*parenthesized_p=*/NULL,
12274 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
12276 /* Expect a `)'. */
12277 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
12278 declarator = cp_error_declarator;
12279 if (declarator == cp_error_declarator)
12282 goto handle_declarator;
12284 /* Otherwise, we must be done. */
12288 else if ((!first || dcl_kind != CP_PARSER_DECLARATOR_NAMED)
12289 && token->type == CPP_OPEN_SQUARE)
12291 /* Parse an array-declarator. */
12294 if (ctor_dtor_or_conv_p)
12295 *ctor_dtor_or_conv_p = 0;
12298 parser->default_arg_ok_p = false;
12299 parser->in_declarator_p = true;
12300 /* Consume the `['. */
12301 cp_lexer_consume_token (parser->lexer);
12302 /* Peek at the next token. */
12303 token = cp_lexer_peek_token (parser->lexer);
12304 /* If the next token is `]', then there is no
12305 constant-expression. */
12306 if (token->type != CPP_CLOSE_SQUARE)
12308 bool non_constant_p;
12311 = cp_parser_constant_expression (parser,
12312 /*allow_non_constant=*/true,
12314 if (!non_constant_p)
12315 bounds = fold_non_dependent_expr (bounds);
12316 /* Normally, the array bound must be an integral constant
12317 expression. However, as an extension, we allow VLAs
12318 in function scopes. */
12319 else if (!parser->in_function_body)
12321 error ("array bound is not an integer constant");
12322 bounds = error_mark_node;
12326 bounds = NULL_TREE;
12327 /* Look for the closing `]'. */
12328 if (!cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'"))
12330 declarator = cp_error_declarator;
12334 declarator = make_array_declarator (declarator, bounds);
12336 else if (first && dcl_kind != CP_PARSER_DECLARATOR_ABSTRACT)
12338 tree qualifying_scope;
12339 tree unqualified_name;
12340 special_function_kind sfk;
12342 bool pack_expansion_p = false;
12344 /* Parse a declarator-id */
12345 abstract_ok = (dcl_kind == CP_PARSER_DECLARATOR_EITHER);
12348 cp_parser_parse_tentatively (parser);
12350 /* If we see an ellipsis, we should be looking at a
12352 if (token->type == CPP_ELLIPSIS)
12354 /* Consume the `...' */
12355 cp_lexer_consume_token (parser->lexer);
12357 pack_expansion_p = true;
12362 = cp_parser_declarator_id (parser, /*optional_p=*/abstract_ok);
12363 qualifying_scope = parser->scope;
12368 if (!unqualified_name && pack_expansion_p)
12370 /* Check whether an error occurred. */
12371 okay = !cp_parser_error_occurred (parser);
12373 /* We already consumed the ellipsis to mark a
12374 parameter pack, but we have no way to report it,
12375 so abort the tentative parse. We will be exiting
12376 immediately anyway. */
12377 cp_parser_abort_tentative_parse (parser);
12380 okay = cp_parser_parse_definitely (parser);
12383 unqualified_name = error_mark_node;
12384 else if (unqualified_name
12385 && (qualifying_scope
12386 || (TREE_CODE (unqualified_name)
12387 != IDENTIFIER_NODE)))
12389 cp_parser_error (parser, "expected unqualified-id");
12390 unqualified_name = error_mark_node;
12394 if (!unqualified_name)
12396 if (unqualified_name == error_mark_node)
12398 declarator = cp_error_declarator;
12399 pack_expansion_p = false;
12400 declarator->parameter_pack_p = false;
12404 if (qualifying_scope && at_namespace_scope_p ()
12405 && TREE_CODE (qualifying_scope) == TYPENAME_TYPE)
12407 /* In the declaration of a member of a template class
12408 outside of the class itself, the SCOPE will sometimes
12409 be a TYPENAME_TYPE. For example, given:
12411 template <typename T>
12412 int S<T>::R::i = 3;
12414 the SCOPE will be a TYPENAME_TYPE for `S<T>::R'. In
12415 this context, we must resolve S<T>::R to an ordinary
12416 type, rather than a typename type.
12418 The reason we normally avoid resolving TYPENAME_TYPEs
12419 is that a specialization of `S' might render
12420 `S<T>::R' not a type. However, if `S' is
12421 specialized, then this `i' will not be used, so there
12422 is no harm in resolving the types here. */
12425 /* Resolve the TYPENAME_TYPE. */
12426 type = resolve_typename_type (qualifying_scope,
12427 /*only_current_p=*/false);
12428 /* If that failed, the declarator is invalid. */
12429 if (type == error_mark_node)
12430 error ("%<%T::%E%> is not a type",
12431 TYPE_CONTEXT (qualifying_scope),
12432 TYPE_IDENTIFIER (qualifying_scope));
12433 qualifying_scope = type;
12438 if (unqualified_name)
12442 if (qualifying_scope
12443 && CLASS_TYPE_P (qualifying_scope))
12444 class_type = qualifying_scope;
12446 class_type = current_class_type;
12448 if (TREE_CODE (unqualified_name) == TYPE_DECL)
12450 tree name_type = TREE_TYPE (unqualified_name);
12451 if (class_type && same_type_p (name_type, class_type))
12453 if (qualifying_scope
12454 && CLASSTYPE_USE_TEMPLATE (name_type))
12456 error ("invalid use of constructor as a template");
12457 inform ("use %<%T::%D%> instead of %<%T::%D%> to "
12458 "name the constructor in a qualified name",
12460 DECL_NAME (TYPE_TI_TEMPLATE (class_type)),
12461 class_type, name_type);
12462 declarator = cp_error_declarator;
12466 unqualified_name = constructor_name (class_type);
12470 /* We do not attempt to print the declarator
12471 here because we do not have enough
12472 information about its original syntactic
12474 cp_parser_error (parser, "invalid declarator");
12475 declarator = cp_error_declarator;
12482 if (TREE_CODE (unqualified_name) == BIT_NOT_EXPR)
12483 sfk = sfk_destructor;
12484 else if (IDENTIFIER_TYPENAME_P (unqualified_name))
12485 sfk = sfk_conversion;
12486 else if (/* There's no way to declare a constructor
12487 for an anonymous type, even if the type
12488 got a name for linkage purposes. */
12489 !TYPE_WAS_ANONYMOUS (class_type)
12490 && constructor_name_p (unqualified_name,
12493 unqualified_name = constructor_name (class_type);
12494 sfk = sfk_constructor;
12497 if (ctor_dtor_or_conv_p && sfk != sfk_none)
12498 *ctor_dtor_or_conv_p = -1;
12501 declarator = make_id_declarator (qualifying_scope,
12504 declarator->id_loc = token->location;
12505 declarator->parameter_pack_p = pack_expansion_p;
12507 if (pack_expansion_p)
12508 maybe_warn_variadic_templates ();
12510 handle_declarator:;
12511 scope = get_scope_of_declarator (declarator);
12513 /* Any names that appear after the declarator-id for a
12514 member are looked up in the containing scope. */
12515 pushed_scope = push_scope (scope);
12516 parser->in_declarator_p = true;
12517 if ((ctor_dtor_or_conv_p && *ctor_dtor_or_conv_p)
12518 || (declarator && declarator->kind == cdk_id))
12519 /* Default args are only allowed on function
12521 parser->default_arg_ok_p = saved_default_arg_ok_p;
12523 parser->default_arg_ok_p = false;
12532 /* For an abstract declarator, we might wind up with nothing at this
12533 point. That's an error; the declarator is not optional. */
12535 cp_parser_error (parser, "expected declarator");
12537 /* If we entered a scope, we must exit it now. */
12539 pop_scope (pushed_scope);
12541 parser->default_arg_ok_p = saved_default_arg_ok_p;
12542 parser->in_declarator_p = saved_in_declarator_p;
12547 /* Parse a ptr-operator.
12550 * cv-qualifier-seq [opt]
12552 :: [opt] nested-name-specifier * cv-qualifier-seq [opt]
12557 & cv-qualifier-seq [opt]
12559 Returns INDIRECT_REF if a pointer, or pointer-to-member, was used.
12560 Returns ADDR_EXPR if a reference was used. In the case of a
12561 pointer-to-member, *TYPE is filled in with the TYPE containing the
12562 member. *CV_QUALS is filled in with the cv-qualifier-seq, or
12563 TYPE_UNQUALIFIED, if there are no cv-qualifiers. Returns
12564 ERROR_MARK if an error occurred. */
12566 static enum tree_code
12567 cp_parser_ptr_operator (cp_parser* parser,
12569 cp_cv_quals *cv_quals)
12571 enum tree_code code = ERROR_MARK;
12574 /* Assume that it's not a pointer-to-member. */
12576 /* And that there are no cv-qualifiers. */
12577 *cv_quals = TYPE_UNQUALIFIED;
12579 /* Peek at the next token. */
12580 token = cp_lexer_peek_token (parser->lexer);
12581 /* If it's a `*' or `&' we have a pointer or reference. */
12582 if (token->type == CPP_MULT || token->type == CPP_AND)
12584 /* Remember which ptr-operator we were processing. */
12585 code = (token->type == CPP_AND ? ADDR_EXPR : INDIRECT_REF);
12587 /* Consume the `*' or `&'. */
12588 cp_lexer_consume_token (parser->lexer);
12590 /* A `*' can be followed by a cv-qualifier-seq, and so can a
12591 `&', if we are allowing GNU extensions. (The only qualifier
12592 that can legally appear after `&' is `restrict', but that is
12593 enforced during semantic analysis. */
12594 if (code == INDIRECT_REF
12595 || cp_parser_allow_gnu_extensions_p (parser))
12596 *cv_quals = cp_parser_cv_qualifier_seq_opt (parser);
12600 /* Try the pointer-to-member case. */
12601 cp_parser_parse_tentatively (parser);
12602 /* Look for the optional `::' operator. */
12603 cp_parser_global_scope_opt (parser,
12604 /*current_scope_valid_p=*/false);
12605 /* Look for the nested-name specifier. */
12606 cp_parser_nested_name_specifier (parser,
12607 /*typename_keyword_p=*/false,
12608 /*check_dependency_p=*/true,
12610 /*is_declaration=*/false);
12611 /* If we found it, and the next token is a `*', then we are
12612 indeed looking at a pointer-to-member operator. */
12613 if (!cp_parser_error_occurred (parser)
12614 && cp_parser_require (parser, CPP_MULT, "`*'"))
12616 /* Indicate that the `*' operator was used. */
12617 code = INDIRECT_REF;
12619 if (TREE_CODE (parser->scope) == NAMESPACE_DECL)
12620 error ("%qD is a namespace", parser->scope);
12623 /* The type of which the member is a member is given by the
12625 *type = parser->scope;
12626 /* The next name will not be qualified. */
12627 parser->scope = NULL_TREE;
12628 parser->qualifying_scope = NULL_TREE;
12629 parser->object_scope = NULL_TREE;
12630 /* Look for the optional cv-qualifier-seq. */
12631 *cv_quals = cp_parser_cv_qualifier_seq_opt (parser);
12634 /* If that didn't work we don't have a ptr-operator. */
12635 if (!cp_parser_parse_definitely (parser))
12636 cp_parser_error (parser, "expected ptr-operator");
12642 /* Parse an (optional) cv-qualifier-seq.
12645 cv-qualifier cv-qualifier-seq [opt]
12656 Returns a bitmask representing the cv-qualifiers. */
12659 cp_parser_cv_qualifier_seq_opt (cp_parser* parser)
12661 cp_cv_quals cv_quals = TYPE_UNQUALIFIED;
12666 cp_cv_quals cv_qualifier;
12668 /* Peek at the next token. */
12669 token = cp_lexer_peek_token (parser->lexer);
12670 /* See if it's a cv-qualifier. */
12671 switch (token->keyword)
12674 cv_qualifier = TYPE_QUAL_CONST;
12678 cv_qualifier = TYPE_QUAL_VOLATILE;
12682 cv_qualifier = TYPE_QUAL_RESTRICT;
12686 cv_qualifier = TYPE_UNQUALIFIED;
12693 if (cv_quals & cv_qualifier)
12695 error ("duplicate cv-qualifier");
12696 cp_lexer_purge_token (parser->lexer);
12700 cp_lexer_consume_token (parser->lexer);
12701 cv_quals |= cv_qualifier;
12708 /* Parse a declarator-id.
12712 :: [opt] nested-name-specifier [opt] type-name
12714 In the `id-expression' case, the value returned is as for
12715 cp_parser_id_expression if the id-expression was an unqualified-id.
12716 If the id-expression was a qualified-id, then a SCOPE_REF is
12717 returned. The first operand is the scope (either a NAMESPACE_DECL
12718 or TREE_TYPE), but the second is still just a representation of an
12722 cp_parser_declarator_id (cp_parser* parser, bool optional_p)
12725 /* The expression must be an id-expression. Assume that qualified
12726 names are the names of types so that:
12729 int S<T>::R::i = 3;
12731 will work; we must treat `S<T>::R' as the name of a type.
12732 Similarly, assume that qualified names are templates, where
12736 int S<T>::R<T>::i = 3;
12739 id = cp_parser_id_expression (parser,
12740 /*template_keyword_p=*/false,
12741 /*check_dependency_p=*/false,
12742 /*template_p=*/NULL,
12743 /*declarator_p=*/true,
12745 if (id && BASELINK_P (id))
12746 id = BASELINK_FUNCTIONS (id);
12750 /* Parse a type-id.
12753 type-specifier-seq abstract-declarator [opt]
12755 Returns the TYPE specified. */
12758 cp_parser_type_id (cp_parser* parser)
12760 cp_decl_specifier_seq type_specifier_seq;
12761 cp_declarator *abstract_declarator;
12763 /* Parse the type-specifier-seq. */
12764 cp_parser_type_specifier_seq (parser, /*is_condition=*/false,
12765 &type_specifier_seq);
12766 if (type_specifier_seq.type == error_mark_node)
12767 return error_mark_node;
12769 /* There might or might not be an abstract declarator. */
12770 cp_parser_parse_tentatively (parser);
12771 /* Look for the declarator. */
12772 abstract_declarator
12773 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_ABSTRACT, NULL,
12774 /*parenthesized_p=*/NULL,
12775 /*member_p=*/false);
12776 /* Check to see if there really was a declarator. */
12777 if (!cp_parser_parse_definitely (parser))
12778 abstract_declarator = NULL;
12780 return groktypename (&type_specifier_seq, abstract_declarator);
12783 /* Parse a type-specifier-seq.
12785 type-specifier-seq:
12786 type-specifier type-specifier-seq [opt]
12790 type-specifier-seq:
12791 attributes type-specifier-seq [opt]
12793 If IS_CONDITION is true, we are at the start of a "condition",
12794 e.g., we've just seen "if (".
12796 Sets *TYPE_SPECIFIER_SEQ to represent the sequence. */
12799 cp_parser_type_specifier_seq (cp_parser* parser,
12801 cp_decl_specifier_seq *type_specifier_seq)
12803 bool seen_type_specifier = false;
12804 cp_parser_flags flags = CP_PARSER_FLAGS_OPTIONAL;
12806 /* Clear the TYPE_SPECIFIER_SEQ. */
12807 clear_decl_specs (type_specifier_seq);
12809 /* Parse the type-specifiers and attributes. */
12812 tree type_specifier;
12813 bool is_cv_qualifier;
12815 /* Check for attributes first. */
12816 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_ATTRIBUTE))
12818 type_specifier_seq->attributes =
12819 chainon (type_specifier_seq->attributes,
12820 cp_parser_attributes_opt (parser));
12824 /* Look for the type-specifier. */
12825 type_specifier = cp_parser_type_specifier (parser,
12827 type_specifier_seq,
12828 /*is_declaration=*/false,
12831 if (!type_specifier)
12833 /* If the first type-specifier could not be found, this is not a
12834 type-specifier-seq at all. */
12835 if (!seen_type_specifier)
12837 cp_parser_error (parser, "expected type-specifier");
12838 type_specifier_seq->type = error_mark_node;
12841 /* If subsequent type-specifiers could not be found, the
12842 type-specifier-seq is complete. */
12846 seen_type_specifier = true;
12847 /* The standard says that a condition can be:
12849 type-specifier-seq declarator = assignment-expression
12856 we should treat the "S" as a declarator, not as a
12857 type-specifier. The standard doesn't say that explicitly for
12858 type-specifier-seq, but it does say that for
12859 decl-specifier-seq in an ordinary declaration. Perhaps it
12860 would be clearer just to allow a decl-specifier-seq here, and
12861 then add a semantic restriction that if any decl-specifiers
12862 that are not type-specifiers appear, the program is invalid. */
12863 if (is_condition && !is_cv_qualifier)
12864 flags |= CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES;
12867 cp_parser_check_decl_spec (type_specifier_seq);
12870 /* Parse a parameter-declaration-clause.
12872 parameter-declaration-clause:
12873 parameter-declaration-list [opt] ... [opt]
12874 parameter-declaration-list , ...
12876 Returns a representation for the parameter declarations. A return
12877 value of NULL indicates a parameter-declaration-clause consisting
12878 only of an ellipsis. */
12880 static cp_parameter_declarator *
12881 cp_parser_parameter_declaration_clause (cp_parser* parser)
12883 cp_parameter_declarator *parameters;
12888 /* Peek at the next token. */
12889 token = cp_lexer_peek_token (parser->lexer);
12890 /* Check for trivial parameter-declaration-clauses. */
12891 if (token->type == CPP_ELLIPSIS)
12893 /* Consume the `...' token. */
12894 cp_lexer_consume_token (parser->lexer);
12897 else if (token->type == CPP_CLOSE_PAREN)
12898 /* There are no parameters. */
12900 #ifndef NO_IMPLICIT_EXTERN_C
12901 if (in_system_header && current_class_type == NULL
12902 && current_lang_name == lang_name_c)
12906 return no_parameters;
12908 /* Check for `(void)', too, which is a special case. */
12909 else if (token->keyword == RID_VOID
12910 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
12911 == CPP_CLOSE_PAREN))
12913 /* Consume the `void' token. */
12914 cp_lexer_consume_token (parser->lexer);
12915 /* There are no parameters. */
12916 return no_parameters;
12919 /* Parse the parameter-declaration-list. */
12920 parameters = cp_parser_parameter_declaration_list (parser, &is_error);
12921 /* If a parse error occurred while parsing the
12922 parameter-declaration-list, then the entire
12923 parameter-declaration-clause is erroneous. */
12927 /* Peek at the next token. */
12928 token = cp_lexer_peek_token (parser->lexer);
12929 /* If it's a `,', the clause should terminate with an ellipsis. */
12930 if (token->type == CPP_COMMA)
12932 /* Consume the `,'. */
12933 cp_lexer_consume_token (parser->lexer);
12934 /* Expect an ellipsis. */
12936 = (cp_parser_require (parser, CPP_ELLIPSIS, "`...'") != NULL);
12938 /* It might also be `...' if the optional trailing `,' was
12940 else if (token->type == CPP_ELLIPSIS)
12942 /* Consume the `...' token. */
12943 cp_lexer_consume_token (parser->lexer);
12944 /* And remember that we saw it. */
12948 ellipsis_p = false;
12950 /* Finish the parameter list. */
12951 if (parameters && ellipsis_p)
12952 parameters->ellipsis_p = true;
12957 /* Parse a parameter-declaration-list.
12959 parameter-declaration-list:
12960 parameter-declaration
12961 parameter-declaration-list , parameter-declaration
12963 Returns a representation of the parameter-declaration-list, as for
12964 cp_parser_parameter_declaration_clause. However, the
12965 `void_list_node' is never appended to the list. Upon return,
12966 *IS_ERROR will be true iff an error occurred. */
12968 static cp_parameter_declarator *
12969 cp_parser_parameter_declaration_list (cp_parser* parser, bool *is_error)
12971 cp_parameter_declarator *parameters = NULL;
12972 cp_parameter_declarator **tail = ¶meters;
12973 bool saved_in_unbraced_linkage_specification_p;
12975 /* Assume all will go well. */
12977 /* The special considerations that apply to a function within an
12978 unbraced linkage specifications do not apply to the parameters
12979 to the function. */
12980 saved_in_unbraced_linkage_specification_p
12981 = parser->in_unbraced_linkage_specification_p;
12982 parser->in_unbraced_linkage_specification_p = false;
12984 /* Look for more parameters. */
12987 cp_parameter_declarator *parameter;
12988 bool parenthesized_p;
12989 /* Parse the parameter. */
12991 = cp_parser_parameter_declaration (parser,
12992 /*template_parm_p=*/false,
12995 /* If a parse error occurred parsing the parameter declaration,
12996 then the entire parameter-declaration-list is erroneous. */
13003 /* Add the new parameter to the list. */
13005 tail = ¶meter->next;
13007 /* Peek at the next token. */
13008 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_PAREN)
13009 || cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS)
13010 /* These are for Objective-C++ */
13011 || cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)
13012 || cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
13013 /* The parameter-declaration-list is complete. */
13015 else if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
13019 /* Peek at the next token. */
13020 token = cp_lexer_peek_nth_token (parser->lexer, 2);
13021 /* If it's an ellipsis, then the list is complete. */
13022 if (token->type == CPP_ELLIPSIS)
13024 /* Otherwise, there must be more parameters. Consume the
13026 cp_lexer_consume_token (parser->lexer);
13027 /* When parsing something like:
13029 int i(float f, double d)
13031 we can tell after seeing the declaration for "f" that we
13032 are not looking at an initialization of a variable "i",
13033 but rather at the declaration of a function "i".
13035 Due to the fact that the parsing of template arguments
13036 (as specified to a template-id) requires backtracking we
13037 cannot use this technique when inside a template argument
13039 if (!parser->in_template_argument_list_p
13040 && !parser->in_type_id_in_expr_p
13041 && cp_parser_uncommitted_to_tentative_parse_p (parser)
13042 /* However, a parameter-declaration of the form
13043 "foat(f)" (which is a valid declaration of a
13044 parameter "f") can also be interpreted as an
13045 expression (the conversion of "f" to "float"). */
13046 && !parenthesized_p)
13047 cp_parser_commit_to_tentative_parse (parser);
13051 cp_parser_error (parser, "expected %<,%> or %<...%>");
13052 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
13053 cp_parser_skip_to_closing_parenthesis (parser,
13054 /*recovering=*/true,
13055 /*or_comma=*/false,
13056 /*consume_paren=*/false);
13061 parser->in_unbraced_linkage_specification_p
13062 = saved_in_unbraced_linkage_specification_p;
13067 /* Parse a parameter declaration.
13069 parameter-declaration:
13070 decl-specifier-seq ... [opt] declarator
13071 decl-specifier-seq declarator = assignment-expression
13072 decl-specifier-seq ... [opt] abstract-declarator [opt]
13073 decl-specifier-seq abstract-declarator [opt] = assignment-expression
13075 If TEMPLATE_PARM_P is TRUE, then this parameter-declaration
13076 declares a template parameter. (In that case, a non-nested `>'
13077 token encountered during the parsing of the assignment-expression
13078 is not interpreted as a greater-than operator.)
13080 Returns a representation of the parameter, or NULL if an error
13081 occurs. If PARENTHESIZED_P is non-NULL, *PARENTHESIZED_P is set to
13082 true iff the declarator is of the form "(p)". */
13084 static cp_parameter_declarator *
13085 cp_parser_parameter_declaration (cp_parser *parser,
13086 bool template_parm_p,
13087 bool *parenthesized_p)
13089 int declares_class_or_enum;
13090 bool greater_than_is_operator_p;
13091 cp_decl_specifier_seq decl_specifiers;
13092 cp_declarator *declarator;
13093 tree default_argument;
13095 const char *saved_message;
13097 /* In a template parameter, `>' is not an operator.
13101 When parsing a default template-argument for a non-type
13102 template-parameter, the first non-nested `>' is taken as the end
13103 of the template parameter-list rather than a greater-than
13105 greater_than_is_operator_p = !template_parm_p;
13107 /* Type definitions may not appear in parameter types. */
13108 saved_message = parser->type_definition_forbidden_message;
13109 parser->type_definition_forbidden_message
13110 = "types may not be defined in parameter types";
13112 /* Parse the declaration-specifiers. */
13113 cp_parser_decl_specifier_seq (parser,
13114 CP_PARSER_FLAGS_NONE,
13116 &declares_class_or_enum);
13117 /* If an error occurred, there's no reason to attempt to parse the
13118 rest of the declaration. */
13119 if (cp_parser_error_occurred (parser))
13121 parser->type_definition_forbidden_message = saved_message;
13125 /* Peek at the next token. */
13126 token = cp_lexer_peek_token (parser->lexer);
13128 /* If the next token is a `)', `,', `=', `>', or `...', then there
13129 is no declarator. However, when variadic templates are enabled,
13130 there may be a declarator following `...'. */
13131 if (token->type == CPP_CLOSE_PAREN
13132 || token->type == CPP_COMMA
13133 || token->type == CPP_EQ
13134 || token->type == CPP_GREATER)
13137 if (parenthesized_p)
13138 *parenthesized_p = false;
13140 /* Otherwise, there should be a declarator. */
13143 bool saved_default_arg_ok_p = parser->default_arg_ok_p;
13144 parser->default_arg_ok_p = false;
13146 /* After seeing a decl-specifier-seq, if the next token is not a
13147 "(", there is no possibility that the code is a valid
13148 expression. Therefore, if parsing tentatively, we commit at
13150 if (!parser->in_template_argument_list_p
13151 /* In an expression context, having seen:
13155 we cannot be sure whether we are looking at a
13156 function-type (taking a "char" as a parameter) or a cast
13157 of some object of type "char" to "int". */
13158 && !parser->in_type_id_in_expr_p
13159 && cp_parser_uncommitted_to_tentative_parse_p (parser)
13160 && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_PAREN))
13161 cp_parser_commit_to_tentative_parse (parser);
13162 /* Parse the declarator. */
13163 declarator = cp_parser_declarator (parser,
13164 CP_PARSER_DECLARATOR_EITHER,
13165 /*ctor_dtor_or_conv_p=*/NULL,
13167 /*member_p=*/false);
13168 parser->default_arg_ok_p = saved_default_arg_ok_p;
13169 /* After the declarator, allow more attributes. */
13170 decl_specifiers.attributes
13171 = chainon (decl_specifiers.attributes,
13172 cp_parser_attributes_opt (parser));
13175 /* If the next token is an ellipsis, and we have not seen a
13176 declarator name, and the type of the declarator contains parameter
13177 packs but it is not a TYPE_PACK_EXPANSION, then we actually have
13178 a parameter pack expansion expression. Otherwise, leave the
13179 ellipsis for a C-style variadic function. */
13180 token = cp_lexer_peek_token (parser->lexer);
13181 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
13183 tree type = decl_specifiers.type;
13185 if (type && DECL_P (type))
13186 type = TREE_TYPE (type);
13189 && TREE_CODE (type) != TYPE_PACK_EXPANSION
13190 && declarator_can_be_parameter_pack (declarator)
13191 && (!declarator || !declarator->parameter_pack_p)
13192 && uses_parameter_packs (type))
13194 /* Consume the `...'. */
13195 cp_lexer_consume_token (parser->lexer);
13196 maybe_warn_variadic_templates ();
13198 /* Build a pack expansion type */
13200 declarator->parameter_pack_p = true;
13202 decl_specifiers.type = make_pack_expansion (type);
13206 /* The restriction on defining new types applies only to the type
13207 of the parameter, not to the default argument. */
13208 parser->type_definition_forbidden_message = saved_message;
13210 /* If the next token is `=', then process a default argument. */
13211 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
13213 bool saved_greater_than_is_operator_p;
13214 /* Consume the `='. */
13215 cp_lexer_consume_token (parser->lexer);
13217 /* If we are defining a class, then the tokens that make up the
13218 default argument must be saved and processed later. */
13219 if (!template_parm_p && at_class_scope_p ()
13220 && TYPE_BEING_DEFINED (current_class_type))
13222 unsigned depth = 0;
13223 cp_token *first_token;
13226 /* Add tokens until we have processed the entire default
13227 argument. We add the range [first_token, token). */
13228 first_token = cp_lexer_peek_token (parser->lexer);
13233 /* Peek at the next token. */
13234 token = cp_lexer_peek_token (parser->lexer);
13235 /* What we do depends on what token we have. */
13236 switch (token->type)
13238 /* In valid code, a default argument must be
13239 immediately followed by a `,' `)', or `...'. */
13241 case CPP_CLOSE_PAREN:
13243 /* If we run into a non-nested `;', `}', or `]',
13244 then the code is invalid -- but the default
13245 argument is certainly over. */
13246 case CPP_SEMICOLON:
13247 case CPP_CLOSE_BRACE:
13248 case CPP_CLOSE_SQUARE:
13251 /* Update DEPTH, if necessary. */
13252 else if (token->type == CPP_CLOSE_PAREN
13253 || token->type == CPP_CLOSE_BRACE
13254 || token->type == CPP_CLOSE_SQUARE)
13258 case CPP_OPEN_PAREN:
13259 case CPP_OPEN_SQUARE:
13260 case CPP_OPEN_BRACE:
13267 /* Fall through for C++0x, which treats the `>>'
13268 operator like two `>' tokens in certain
13272 /* If we see a non-nested `>', and `>' is not an
13273 operator, then it marks the end of the default
13275 if (!depth && !greater_than_is_operator_p)
13279 /* If we run out of tokens, issue an error message. */
13281 case CPP_PRAGMA_EOL:
13282 error ("file ends in default argument");
13288 /* In these cases, we should look for template-ids.
13289 For example, if the default argument is
13290 `X<int, double>()', we need to do name lookup to
13291 figure out whether or not `X' is a template; if
13292 so, the `,' does not end the default argument.
13294 That is not yet done. */
13301 /* If we've reached the end, stop. */
13305 /* Add the token to the token block. */
13306 token = cp_lexer_consume_token (parser->lexer);
13309 /* Create a DEFAULT_ARG to represented the unparsed default
13311 default_argument = make_node (DEFAULT_ARG);
13312 DEFARG_TOKENS (default_argument)
13313 = cp_token_cache_new (first_token, token);
13314 DEFARG_INSTANTIATIONS (default_argument) = NULL;
13316 /* Outside of a class definition, we can just parse the
13317 assignment-expression. */
13320 bool saved_local_variables_forbidden_p;
13322 /* Make sure that PARSER->GREATER_THAN_IS_OPERATOR_P is
13324 saved_greater_than_is_operator_p
13325 = parser->greater_than_is_operator_p;
13326 parser->greater_than_is_operator_p = greater_than_is_operator_p;
13327 /* Local variable names (and the `this' keyword) may not
13328 appear in a default argument. */
13329 saved_local_variables_forbidden_p
13330 = parser->local_variables_forbidden_p;
13331 parser->local_variables_forbidden_p = true;
13332 /* The default argument expression may cause implicitly
13333 defined member functions to be synthesized, which will
13334 result in garbage collection. We must treat this
13335 situation as if we were within the body of function so as
13336 to avoid collecting live data on the stack. */
13338 /* Parse the assignment-expression. */
13339 if (template_parm_p)
13340 push_deferring_access_checks (dk_no_deferred);
13342 = cp_parser_assignment_expression (parser, /*cast_p=*/false);
13343 if (template_parm_p)
13344 pop_deferring_access_checks ();
13345 /* Restore saved state. */
13347 parser->greater_than_is_operator_p
13348 = saved_greater_than_is_operator_p;
13349 parser->local_variables_forbidden_p
13350 = saved_local_variables_forbidden_p;
13352 if (!parser->default_arg_ok_p)
13354 if (!flag_pedantic_errors)
13355 warning (0, "deprecated use of default argument for parameter of non-function");
13358 error ("default arguments are only permitted for function parameters");
13359 default_argument = NULL_TREE;
13364 default_argument = NULL_TREE;
13366 return make_parameter_declarator (&decl_specifiers,
13371 /* Parse a function-body.
13374 compound_statement */
13377 cp_parser_function_body (cp_parser *parser)
13379 cp_parser_compound_statement (parser, NULL, false);
13382 /* Parse a ctor-initializer-opt followed by a function-body. Return
13383 true if a ctor-initializer was present. */
13386 cp_parser_ctor_initializer_opt_and_function_body (cp_parser *parser)
13389 bool ctor_initializer_p;
13391 /* Begin the function body. */
13392 body = begin_function_body ();
13393 /* Parse the optional ctor-initializer. */
13394 ctor_initializer_p = cp_parser_ctor_initializer_opt (parser);
13395 /* Parse the function-body. */
13396 cp_parser_function_body (parser);
13397 /* Finish the function body. */
13398 finish_function_body (body);
13400 return ctor_initializer_p;
13403 /* Parse an initializer.
13406 = initializer-clause
13407 ( expression-list )
13409 Returns an expression representing the initializer. If no
13410 initializer is present, NULL_TREE is returned.
13412 *IS_PARENTHESIZED_INIT is set to TRUE if the `( expression-list )'
13413 production is used, and zero otherwise. *IS_PARENTHESIZED_INIT is
13414 set to FALSE if there is no initializer present. If there is an
13415 initializer, and it is not a constant-expression, *NON_CONSTANT_P
13416 is set to true; otherwise it is set to false. */
13419 cp_parser_initializer (cp_parser* parser, bool* is_parenthesized_init,
13420 bool* non_constant_p)
13425 /* Peek at the next token. */
13426 token = cp_lexer_peek_token (parser->lexer);
13428 /* Let our caller know whether or not this initializer was
13430 *is_parenthesized_init = (token->type == CPP_OPEN_PAREN);
13431 /* Assume that the initializer is constant. */
13432 *non_constant_p = false;
13434 if (token->type == CPP_EQ)
13436 /* Consume the `='. */
13437 cp_lexer_consume_token (parser->lexer);
13438 /* Parse the initializer-clause. */
13439 init = cp_parser_initializer_clause (parser, non_constant_p);
13441 else if (token->type == CPP_OPEN_PAREN)
13442 init = cp_parser_parenthesized_expression_list (parser, false,
13444 /*allow_expansion_p=*/true,
13448 /* Anything else is an error. */
13449 cp_parser_error (parser, "expected initializer");
13450 init = error_mark_node;
13456 /* Parse an initializer-clause.
13458 initializer-clause:
13459 assignment-expression
13460 { initializer-list , [opt] }
13463 Returns an expression representing the initializer.
13465 If the `assignment-expression' production is used the value
13466 returned is simply a representation for the expression.
13468 Otherwise, a CONSTRUCTOR is returned. The CONSTRUCTOR_ELTS will be
13469 the elements of the initializer-list (or NULL, if the last
13470 production is used). The TREE_TYPE for the CONSTRUCTOR will be
13471 NULL_TREE. There is no way to detect whether or not the optional
13472 trailing `,' was provided. NON_CONSTANT_P is as for
13473 cp_parser_initializer. */
13476 cp_parser_initializer_clause (cp_parser* parser, bool* non_constant_p)
13480 /* Assume the expression is constant. */
13481 *non_constant_p = false;
13483 /* If it is not a `{', then we are looking at an
13484 assignment-expression. */
13485 if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE))
13488 = cp_parser_constant_expression (parser,
13489 /*allow_non_constant_p=*/true,
13491 if (!*non_constant_p)
13492 initializer = fold_non_dependent_expr (initializer);
13496 /* Consume the `{' token. */
13497 cp_lexer_consume_token (parser->lexer);
13498 /* Create a CONSTRUCTOR to represent the braced-initializer. */
13499 initializer = make_node (CONSTRUCTOR);
13500 /* If it's not a `}', then there is a non-trivial initializer. */
13501 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_BRACE))
13503 /* Parse the initializer list. */
13504 CONSTRUCTOR_ELTS (initializer)
13505 = cp_parser_initializer_list (parser, non_constant_p);
13506 /* A trailing `,' token is allowed. */
13507 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
13508 cp_lexer_consume_token (parser->lexer);
13510 /* Now, there should be a trailing `}'. */
13511 cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'");
13514 return initializer;
13517 /* Parse an initializer-list.
13520 initializer-clause ... [opt]
13521 initializer-list , initializer-clause ... [opt]
13526 identifier : initializer-clause
13527 initializer-list, identifier : initializer-clause
13529 Returns a VEC of constructor_elt. The VALUE of each elt is an expression
13530 for the initializer. If the INDEX of the elt is non-NULL, it is the
13531 IDENTIFIER_NODE naming the field to initialize. NON_CONSTANT_P is
13532 as for cp_parser_initializer. */
13534 static VEC(constructor_elt,gc) *
13535 cp_parser_initializer_list (cp_parser* parser, bool* non_constant_p)
13537 VEC(constructor_elt,gc) *v = NULL;
13539 /* Assume all of the expressions are constant. */
13540 *non_constant_p = false;
13542 /* Parse the rest of the list. */
13548 bool clause_non_constant_p;
13550 /* If the next token is an identifier and the following one is a
13551 colon, we are looking at the GNU designated-initializer
13553 if (cp_parser_allow_gnu_extensions_p (parser)
13554 && cp_lexer_next_token_is (parser->lexer, CPP_NAME)
13555 && cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_COLON)
13557 /* Warn the user that they are using an extension. */
13559 pedwarn ("ISO C++ does not allow designated initializers");
13560 /* Consume the identifier. */
13561 identifier = cp_lexer_consume_token (parser->lexer)->u.value;
13562 /* Consume the `:'. */
13563 cp_lexer_consume_token (parser->lexer);
13566 identifier = NULL_TREE;
13568 /* Parse the initializer. */
13569 initializer = cp_parser_initializer_clause (parser,
13570 &clause_non_constant_p);
13571 /* If any clause is non-constant, so is the entire initializer. */
13572 if (clause_non_constant_p)
13573 *non_constant_p = true;
13575 /* If we have an ellipsis, this is an initializer pack
13577 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
13579 /* Consume the `...'. */
13580 cp_lexer_consume_token (parser->lexer);
13582 /* Turn the initializer into an initializer expansion. */
13583 initializer = make_pack_expansion (initializer);
13586 /* Add it to the vector. */
13587 CONSTRUCTOR_APPEND_ELT(v, identifier, initializer);
13589 /* If the next token is not a comma, we have reached the end of
13591 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
13594 /* Peek at the next token. */
13595 token = cp_lexer_peek_nth_token (parser->lexer, 2);
13596 /* If the next token is a `}', then we're still done. An
13597 initializer-clause can have a trailing `,' after the
13598 initializer-list and before the closing `}'. */
13599 if (token->type == CPP_CLOSE_BRACE)
13602 /* Consume the `,' token. */
13603 cp_lexer_consume_token (parser->lexer);
13609 /* Classes [gram.class] */
13611 /* Parse a class-name.
13617 TYPENAME_KEYWORD_P is true iff the `typename' keyword has been used
13618 to indicate that names looked up in dependent types should be
13619 assumed to be types. TEMPLATE_KEYWORD_P is true iff the `template'
13620 keyword has been used to indicate that the name that appears next
13621 is a template. TAG_TYPE indicates the explicit tag given before
13622 the type name, if any. If CHECK_DEPENDENCY_P is FALSE, names are
13623 looked up in dependent scopes. If CLASS_HEAD_P is TRUE, this class
13624 is the class being defined in a class-head.
13626 Returns the TYPE_DECL representing the class. */
13629 cp_parser_class_name (cp_parser *parser,
13630 bool typename_keyword_p,
13631 bool template_keyword_p,
13632 enum tag_types tag_type,
13633 bool check_dependency_p,
13635 bool is_declaration)
13642 /* All class-names start with an identifier. */
13643 token = cp_lexer_peek_token (parser->lexer);
13644 if (token->type != CPP_NAME && token->type != CPP_TEMPLATE_ID)
13646 cp_parser_error (parser, "expected class-name");
13647 return error_mark_node;
13650 /* PARSER->SCOPE can be cleared when parsing the template-arguments
13651 to a template-id, so we save it here. */
13652 scope = parser->scope;
13653 if (scope == error_mark_node)
13654 return error_mark_node;
13656 /* Any name names a type if we're following the `typename' keyword
13657 in a qualified name where the enclosing scope is type-dependent. */
13658 typename_p = (typename_keyword_p && scope && TYPE_P (scope)
13659 && dependent_type_p (scope));
13660 /* Handle the common case (an identifier, but not a template-id)
13662 if (token->type == CPP_NAME
13663 && !cp_parser_nth_token_starts_template_argument_list_p (parser, 2))
13665 cp_token *identifier_token;
13669 /* Look for the identifier. */
13670 identifier_token = cp_lexer_peek_token (parser->lexer);
13671 ambiguous_p = identifier_token->ambiguous_p;
13672 identifier = cp_parser_identifier (parser);
13673 /* If the next token isn't an identifier, we are certainly not
13674 looking at a class-name. */
13675 if (identifier == error_mark_node)
13676 decl = error_mark_node;
13677 /* If we know this is a type-name, there's no need to look it
13679 else if (typename_p)
13683 tree ambiguous_decls;
13684 /* If we already know that this lookup is ambiguous, then
13685 we've already issued an error message; there's no reason
13689 cp_parser_simulate_error (parser);
13690 return error_mark_node;
13692 /* If the next token is a `::', then the name must be a type
13695 [basic.lookup.qual]
13697 During the lookup for a name preceding the :: scope
13698 resolution operator, object, function, and enumerator
13699 names are ignored. */
13700 if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
13701 tag_type = typename_type;
13702 /* Look up the name. */
13703 decl = cp_parser_lookup_name (parser, identifier,
13705 /*is_template=*/false,
13706 /*is_namespace=*/false,
13707 check_dependency_p,
13709 if (ambiguous_decls)
13711 error ("reference to %qD is ambiguous", identifier);
13712 print_candidates (ambiguous_decls);
13713 if (cp_parser_parsing_tentatively (parser))
13715 identifier_token->ambiguous_p = true;
13716 cp_parser_simulate_error (parser);
13718 return error_mark_node;
13724 /* Try a template-id. */
13725 decl = cp_parser_template_id (parser, template_keyword_p,
13726 check_dependency_p,
13728 if (decl == error_mark_node)
13729 return error_mark_node;
13732 decl = cp_parser_maybe_treat_template_as_class (decl, class_head_p);
13734 /* If this is a typename, create a TYPENAME_TYPE. */
13735 if (typename_p && decl != error_mark_node)
13737 decl = make_typename_type (scope, decl, typename_type,
13738 /*complain=*/tf_error);
13739 if (decl != error_mark_node)
13740 decl = TYPE_NAME (decl);
13743 /* Check to see that it is really the name of a class. */
13744 if (TREE_CODE (decl) == TEMPLATE_ID_EXPR
13745 && TREE_CODE (TREE_OPERAND (decl, 0)) == IDENTIFIER_NODE
13746 && cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
13747 /* Situations like this:
13749 template <typename T> struct A {
13750 typename T::template X<int>::I i;
13753 are problematic. Is `T::template X<int>' a class-name? The
13754 standard does not seem to be definitive, but there is no other
13755 valid interpretation of the following `::'. Therefore, those
13756 names are considered class-names. */
13758 decl = make_typename_type (scope, decl, tag_type, tf_error);
13759 if (decl != error_mark_node)
13760 decl = TYPE_NAME (decl);
13762 else if (TREE_CODE (decl) != TYPE_DECL
13763 || TREE_TYPE (decl) == error_mark_node
13764 || !IS_AGGR_TYPE (TREE_TYPE (decl)))
13765 decl = error_mark_node;
13767 if (decl == error_mark_node)
13768 cp_parser_error (parser, "expected class-name");
13773 /* Parse a class-specifier.
13776 class-head { member-specification [opt] }
13778 Returns the TREE_TYPE representing the class. */
13781 cp_parser_class_specifier (cp_parser* parser)
13785 tree attributes = NULL_TREE;
13786 int has_trailing_semicolon;
13787 bool nested_name_specifier_p;
13788 unsigned saved_num_template_parameter_lists;
13789 bool saved_in_function_body;
13790 tree old_scope = NULL_TREE;
13791 tree scope = NULL_TREE;
13794 push_deferring_access_checks (dk_no_deferred);
13796 /* Parse the class-head. */
13797 type = cp_parser_class_head (parser,
13798 &nested_name_specifier_p,
13801 /* If the class-head was a semantic disaster, skip the entire body
13805 cp_parser_skip_to_end_of_block_or_statement (parser);
13806 pop_deferring_access_checks ();
13807 return error_mark_node;
13810 /* Look for the `{'. */
13811 if (!cp_parser_require (parser, CPP_OPEN_BRACE, "`{'"))
13813 pop_deferring_access_checks ();
13814 return error_mark_node;
13817 /* Process the base classes. If they're invalid, skip the
13818 entire class body. */
13819 if (!xref_basetypes (type, bases))
13821 cp_parser_skip_to_closing_brace (parser);
13823 /* Consuming the closing brace yields better error messages
13825 cp_lexer_consume_token (parser->lexer);
13826 pop_deferring_access_checks ();
13827 return error_mark_node;
13830 /* Issue an error message if type-definitions are forbidden here. */
13831 cp_parser_check_type_definition (parser);
13832 /* Remember that we are defining one more class. */
13833 ++parser->num_classes_being_defined;
13834 /* Inside the class, surrounding template-parameter-lists do not
13836 saved_num_template_parameter_lists
13837 = parser->num_template_parameter_lists;
13838 parser->num_template_parameter_lists = 0;
13839 /* We are not in a function body. */
13840 saved_in_function_body = parser->in_function_body;
13841 parser->in_function_body = false;
13843 /* Start the class. */
13844 if (nested_name_specifier_p)
13846 scope = CP_DECL_CONTEXT (TYPE_MAIN_DECL (type));
13847 old_scope = push_inner_scope (scope);
13849 type = begin_class_definition (type, attributes);
13851 if (type == error_mark_node)
13852 /* If the type is erroneous, skip the entire body of the class. */
13853 cp_parser_skip_to_closing_brace (parser);
13855 /* Parse the member-specification. */
13856 cp_parser_member_specification_opt (parser);
13858 /* Look for the trailing `}'. */
13859 cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'");
13860 /* We get better error messages by noticing a common problem: a
13861 missing trailing `;'. */
13862 token = cp_lexer_peek_token (parser->lexer);
13863 has_trailing_semicolon = (token->type == CPP_SEMICOLON);
13864 /* Look for trailing attributes to apply to this class. */
13865 if (cp_parser_allow_gnu_extensions_p (parser))
13866 attributes = cp_parser_attributes_opt (parser);
13867 if (type != error_mark_node)
13868 type = finish_struct (type, attributes);
13869 if (nested_name_specifier_p)
13870 pop_inner_scope (old_scope, scope);
13871 /* If this class is not itself within the scope of another class,
13872 then we need to parse the bodies of all of the queued function
13873 definitions. Note that the queued functions defined in a class
13874 are not always processed immediately following the
13875 class-specifier for that class. Consider:
13878 struct B { void f() { sizeof (A); } };
13881 If `f' were processed before the processing of `A' were
13882 completed, there would be no way to compute the size of `A'.
13883 Note that the nesting we are interested in here is lexical --
13884 not the semantic nesting given by TYPE_CONTEXT. In particular,
13887 struct A { struct B; };
13888 struct A::B { void f() { } };
13890 there is no need to delay the parsing of `A::B::f'. */
13891 if (--parser->num_classes_being_defined == 0)
13895 tree class_type = NULL_TREE;
13896 tree pushed_scope = NULL_TREE;
13898 /* In a first pass, parse default arguments to the functions.
13899 Then, in a second pass, parse the bodies of the functions.
13900 This two-phased approach handles cases like:
13908 for (TREE_PURPOSE (parser->unparsed_functions_queues)
13909 = nreverse (TREE_PURPOSE (parser->unparsed_functions_queues));
13910 (queue_entry = TREE_PURPOSE (parser->unparsed_functions_queues));
13911 TREE_PURPOSE (parser->unparsed_functions_queues)
13912 = TREE_CHAIN (TREE_PURPOSE (parser->unparsed_functions_queues)))
13914 fn = TREE_VALUE (queue_entry);
13915 /* If there are default arguments that have not yet been processed,
13916 take care of them now. */
13917 if (class_type != TREE_PURPOSE (queue_entry))
13920 pop_scope (pushed_scope);
13921 class_type = TREE_PURPOSE (queue_entry);
13922 pushed_scope = push_scope (class_type);
13924 /* Make sure that any template parameters are in scope. */
13925 maybe_begin_member_template_processing (fn);
13926 /* Parse the default argument expressions. */
13927 cp_parser_late_parsing_default_args (parser, fn);
13928 /* Remove any template parameters from the symbol table. */
13929 maybe_end_member_template_processing ();
13932 pop_scope (pushed_scope);
13933 /* Now parse the body of the functions. */
13934 for (TREE_VALUE (parser->unparsed_functions_queues)
13935 = nreverse (TREE_VALUE (parser->unparsed_functions_queues));
13936 (queue_entry = TREE_VALUE (parser->unparsed_functions_queues));
13937 TREE_VALUE (parser->unparsed_functions_queues)
13938 = TREE_CHAIN (TREE_VALUE (parser->unparsed_functions_queues)))
13940 /* Figure out which function we need to process. */
13941 fn = TREE_VALUE (queue_entry);
13942 /* Parse the function. */
13943 cp_parser_late_parsing_for_member (parser, fn);
13947 /* Put back any saved access checks. */
13948 pop_deferring_access_checks ();
13950 /* Restore saved state. */
13951 parser->in_function_body = saved_in_function_body;
13952 parser->num_template_parameter_lists
13953 = saved_num_template_parameter_lists;
13958 /* Parse a class-head.
13961 class-key identifier [opt] base-clause [opt]
13962 class-key nested-name-specifier identifier base-clause [opt]
13963 class-key nested-name-specifier [opt] template-id
13967 class-key attributes identifier [opt] base-clause [opt]
13968 class-key attributes nested-name-specifier identifier base-clause [opt]
13969 class-key attributes nested-name-specifier [opt] template-id
13972 Upon return BASES is initialized to the list of base classes (or
13973 NULL, if there are none) in the same form returned by
13974 cp_parser_base_clause.
13976 Returns the TYPE of the indicated class. Sets
13977 *NESTED_NAME_SPECIFIER_P to TRUE iff one of the productions
13978 involving a nested-name-specifier was used, and FALSE otherwise.
13980 Returns error_mark_node if this is not a class-head.
13982 Returns NULL_TREE if the class-head is syntactically valid, but
13983 semantically invalid in a way that means we should skip the entire
13984 body of the class. */
13987 cp_parser_class_head (cp_parser* parser,
13988 bool* nested_name_specifier_p,
13989 tree *attributes_p,
13992 tree nested_name_specifier;
13993 enum tag_types class_key;
13994 tree id = NULL_TREE;
13995 tree type = NULL_TREE;
13997 bool template_id_p = false;
13998 bool qualified_p = false;
13999 bool invalid_nested_name_p = false;
14000 bool invalid_explicit_specialization_p = false;
14001 tree pushed_scope = NULL_TREE;
14002 unsigned num_templates;
14004 /* Assume no nested-name-specifier will be present. */
14005 *nested_name_specifier_p = false;
14006 /* Assume no template parameter lists will be used in defining the
14010 *bases = NULL_TREE;
14012 /* Look for the class-key. */
14013 class_key = cp_parser_class_key (parser);
14014 if (class_key == none_type)
14015 return error_mark_node;
14017 /* Parse the attributes. */
14018 attributes = cp_parser_attributes_opt (parser);
14020 /* If the next token is `::', that is invalid -- but sometimes
14021 people do try to write:
14025 Handle this gracefully by accepting the extra qualifier, and then
14026 issuing an error about it later if this really is a
14027 class-head. If it turns out just to be an elaborated type
14028 specifier, remain silent. */
14029 if (cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false))
14030 qualified_p = true;
14032 push_deferring_access_checks (dk_no_check);
14034 /* Determine the name of the class. Begin by looking for an
14035 optional nested-name-specifier. */
14036 nested_name_specifier
14037 = cp_parser_nested_name_specifier_opt (parser,
14038 /*typename_keyword_p=*/false,
14039 /*check_dependency_p=*/false,
14041 /*is_declaration=*/false);
14042 /* If there was a nested-name-specifier, then there *must* be an
14044 if (nested_name_specifier)
14046 /* Although the grammar says `identifier', it really means
14047 `class-name' or `template-name'. You are only allowed to
14048 define a class that has already been declared with this
14051 The proposed resolution for Core Issue 180 says that wherever
14052 you see `class T::X' you should treat `X' as a type-name.
14054 It is OK to define an inaccessible class; for example:
14056 class A { class B; };
14059 We do not know if we will see a class-name, or a
14060 template-name. We look for a class-name first, in case the
14061 class-name is a template-id; if we looked for the
14062 template-name first we would stop after the template-name. */
14063 cp_parser_parse_tentatively (parser);
14064 type = cp_parser_class_name (parser,
14065 /*typename_keyword_p=*/false,
14066 /*template_keyword_p=*/false,
14068 /*check_dependency_p=*/false,
14069 /*class_head_p=*/true,
14070 /*is_declaration=*/false);
14071 /* If that didn't work, ignore the nested-name-specifier. */
14072 if (!cp_parser_parse_definitely (parser))
14074 invalid_nested_name_p = true;
14075 id = cp_parser_identifier (parser);
14076 if (id == error_mark_node)
14079 /* If we could not find a corresponding TYPE, treat this
14080 declaration like an unqualified declaration. */
14081 if (type == error_mark_node)
14082 nested_name_specifier = NULL_TREE;
14083 /* Otherwise, count the number of templates used in TYPE and its
14084 containing scopes. */
14089 for (scope = TREE_TYPE (type);
14090 scope && TREE_CODE (scope) != NAMESPACE_DECL;
14091 scope = (TYPE_P (scope)
14092 ? TYPE_CONTEXT (scope)
14093 : DECL_CONTEXT (scope)))
14095 && CLASS_TYPE_P (scope)
14096 && CLASSTYPE_TEMPLATE_INFO (scope)
14097 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (scope))
14098 && !CLASSTYPE_TEMPLATE_SPECIALIZATION (scope))
14102 /* Otherwise, the identifier is optional. */
14105 /* We don't know whether what comes next is a template-id,
14106 an identifier, or nothing at all. */
14107 cp_parser_parse_tentatively (parser);
14108 /* Check for a template-id. */
14109 id = cp_parser_template_id (parser,
14110 /*template_keyword_p=*/false,
14111 /*check_dependency_p=*/true,
14112 /*is_declaration=*/true);
14113 /* If that didn't work, it could still be an identifier. */
14114 if (!cp_parser_parse_definitely (parser))
14116 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
14117 id = cp_parser_identifier (parser);
14123 template_id_p = true;
14128 pop_deferring_access_checks ();
14131 cp_parser_check_for_invalid_template_id (parser, id);
14133 /* If it's not a `:' or a `{' then we can't really be looking at a
14134 class-head, since a class-head only appears as part of a
14135 class-specifier. We have to detect this situation before calling
14136 xref_tag, since that has irreversible side-effects. */
14137 if (!cp_parser_next_token_starts_class_definition_p (parser))
14139 cp_parser_error (parser, "expected %<{%> or %<:%>");
14140 return error_mark_node;
14143 /* At this point, we're going ahead with the class-specifier, even
14144 if some other problem occurs. */
14145 cp_parser_commit_to_tentative_parse (parser);
14146 /* Issue the error about the overly-qualified name now. */
14148 cp_parser_error (parser,
14149 "global qualification of class name is invalid");
14150 else if (invalid_nested_name_p)
14151 cp_parser_error (parser,
14152 "qualified name does not name a class");
14153 else if (nested_name_specifier)
14157 /* Reject typedef-names in class heads. */
14158 if (!DECL_IMPLICIT_TYPEDEF_P (type))
14160 error ("invalid class name in declaration of %qD", type);
14165 /* Figure out in what scope the declaration is being placed. */
14166 scope = current_scope ();
14167 /* If that scope does not contain the scope in which the
14168 class was originally declared, the program is invalid. */
14169 if (scope && !is_ancestor (scope, nested_name_specifier))
14171 error ("declaration of %qD in %qD which does not enclose %qD",
14172 type, scope, nested_name_specifier);
14178 A declarator-id shall not be qualified exception of the
14179 definition of a ... nested class outside of its class
14180 ... [or] a the definition or explicit instantiation of a
14181 class member of a namespace outside of its namespace. */
14182 if (scope == nested_name_specifier)
14184 pedwarn ("extra qualification ignored");
14185 nested_name_specifier = NULL_TREE;
14189 /* An explicit-specialization must be preceded by "template <>". If
14190 it is not, try to recover gracefully. */
14191 if (at_namespace_scope_p ()
14192 && parser->num_template_parameter_lists == 0
14195 error ("an explicit specialization must be preceded by %<template <>%>");
14196 invalid_explicit_specialization_p = true;
14197 /* Take the same action that would have been taken by
14198 cp_parser_explicit_specialization. */
14199 ++parser->num_template_parameter_lists;
14200 begin_specialization ();
14202 /* There must be no "return" statements between this point and the
14203 end of this function; set "type "to the correct return value and
14204 use "goto done;" to return. */
14205 /* Make sure that the right number of template parameters were
14207 if (!cp_parser_check_template_parameters (parser, num_templates))
14209 /* If something went wrong, there is no point in even trying to
14210 process the class-definition. */
14215 /* Look up the type. */
14218 type = TREE_TYPE (id);
14219 type = maybe_process_partial_specialization (type);
14220 if (nested_name_specifier)
14221 pushed_scope = push_scope (nested_name_specifier);
14223 else if (nested_name_specifier)
14229 template <typename T> struct S { struct T };
14230 template <typename T> struct S<T>::T { };
14232 we will get a TYPENAME_TYPE when processing the definition of
14233 `S::T'. We need to resolve it to the actual type before we
14234 try to define it. */
14235 if (TREE_CODE (TREE_TYPE (type)) == TYPENAME_TYPE)
14237 class_type = resolve_typename_type (TREE_TYPE (type),
14238 /*only_current_p=*/false);
14239 if (class_type != error_mark_node)
14240 type = TYPE_NAME (class_type);
14243 cp_parser_error (parser, "could not resolve typename type");
14244 type = error_mark_node;
14248 maybe_process_partial_specialization (TREE_TYPE (type));
14249 class_type = current_class_type;
14250 /* Enter the scope indicated by the nested-name-specifier. */
14251 pushed_scope = push_scope (nested_name_specifier);
14252 /* Get the canonical version of this type. */
14253 type = TYPE_MAIN_DECL (TREE_TYPE (type));
14254 if (PROCESSING_REAL_TEMPLATE_DECL_P ()
14255 && !CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_TYPE (type)))
14257 type = push_template_decl (type);
14258 if (type == error_mark_node)
14265 type = TREE_TYPE (type);
14266 *nested_name_specifier_p = true;
14268 else /* The name is not a nested name. */
14270 /* If the class was unnamed, create a dummy name. */
14272 id = make_anon_name ();
14273 type = xref_tag (class_key, id, /*tag_scope=*/ts_current,
14274 parser->num_template_parameter_lists);
14277 /* Indicate whether this class was declared as a `class' or as a
14279 if (TREE_CODE (type) == RECORD_TYPE)
14280 CLASSTYPE_DECLARED_CLASS (type) = (class_key == class_type);
14281 cp_parser_check_class_key (class_key, type);
14283 /* If this type was already complete, and we see another definition,
14284 that's an error. */
14285 if (type != error_mark_node && COMPLETE_TYPE_P (type))
14287 error ("redefinition of %q#T", type);
14288 error ("previous definition of %q+#T", type);
14292 else if (type == error_mark_node)
14295 /* We will have entered the scope containing the class; the names of
14296 base classes should be looked up in that context. For example:
14298 struct A { struct B {}; struct C; };
14299 struct A::C : B {};
14303 /* Get the list of base-classes, if there is one. */
14304 if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
14305 *bases = cp_parser_base_clause (parser);
14308 /* Leave the scope given by the nested-name-specifier. We will
14309 enter the class scope itself while processing the members. */
14311 pop_scope (pushed_scope);
14313 if (invalid_explicit_specialization_p)
14315 end_specialization ();
14316 --parser->num_template_parameter_lists;
14318 *attributes_p = attributes;
14322 /* Parse a class-key.
14329 Returns the kind of class-key specified, or none_type to indicate
14332 static enum tag_types
14333 cp_parser_class_key (cp_parser* parser)
14336 enum tag_types tag_type;
14338 /* Look for the class-key. */
14339 token = cp_parser_require (parser, CPP_KEYWORD, "class-key");
14343 /* Check to see if the TOKEN is a class-key. */
14344 tag_type = cp_parser_token_is_class_key (token);
14346 cp_parser_error (parser, "expected class-key");
14350 /* Parse an (optional) member-specification.
14352 member-specification:
14353 member-declaration member-specification [opt]
14354 access-specifier : member-specification [opt] */
14357 cp_parser_member_specification_opt (cp_parser* parser)
14364 /* Peek at the next token. */
14365 token = cp_lexer_peek_token (parser->lexer);
14366 /* If it's a `}', or EOF then we've seen all the members. */
14367 if (token->type == CPP_CLOSE_BRACE
14368 || token->type == CPP_EOF
14369 || token->type == CPP_PRAGMA_EOL)
14372 /* See if this token is a keyword. */
14373 keyword = token->keyword;
14377 case RID_PROTECTED:
14379 /* Consume the access-specifier. */
14380 cp_lexer_consume_token (parser->lexer);
14381 /* Remember which access-specifier is active. */
14382 current_access_specifier = token->u.value;
14383 /* Look for the `:'. */
14384 cp_parser_require (parser, CPP_COLON, "`:'");
14388 /* Accept #pragmas at class scope. */
14389 if (token->type == CPP_PRAGMA)
14391 cp_parser_pragma (parser, pragma_external);
14395 /* Otherwise, the next construction must be a
14396 member-declaration. */
14397 cp_parser_member_declaration (parser);
14402 /* Parse a member-declaration.
14404 member-declaration:
14405 decl-specifier-seq [opt] member-declarator-list [opt] ;
14406 function-definition ; [opt]
14407 :: [opt] nested-name-specifier template [opt] unqualified-id ;
14409 template-declaration
14411 member-declarator-list:
14413 member-declarator-list , member-declarator
14416 declarator pure-specifier [opt]
14417 declarator constant-initializer [opt]
14418 identifier [opt] : constant-expression
14422 member-declaration:
14423 __extension__ member-declaration
14426 declarator attributes [opt] pure-specifier [opt]
14427 declarator attributes [opt] constant-initializer [opt]
14428 identifier [opt] attributes [opt] : constant-expression
14432 member-declaration:
14433 static_assert-declaration */
14436 cp_parser_member_declaration (cp_parser* parser)
14438 cp_decl_specifier_seq decl_specifiers;
14439 tree prefix_attributes;
14441 int declares_class_or_enum;
14444 int saved_pedantic;
14446 /* Check for the `__extension__' keyword. */
14447 if (cp_parser_extension_opt (parser, &saved_pedantic))
14450 cp_parser_member_declaration (parser);
14451 /* Restore the old value of the PEDANTIC flag. */
14452 pedantic = saved_pedantic;
14457 /* Check for a template-declaration. */
14458 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
14460 /* An explicit specialization here is an error condition, and we
14461 expect the specialization handler to detect and report this. */
14462 if (cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_LESS
14463 && cp_lexer_peek_nth_token (parser->lexer, 3)->type == CPP_GREATER)
14464 cp_parser_explicit_specialization (parser);
14466 cp_parser_template_declaration (parser, /*member_p=*/true);
14471 /* Check for a using-declaration. */
14472 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_USING))
14474 /* Parse the using-declaration. */
14475 cp_parser_using_declaration (parser,
14476 /*access_declaration_p=*/false);
14480 /* Check for @defs. */
14481 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_AT_DEFS))
14484 tree ivar_chains = cp_parser_objc_defs_expression (parser);
14485 ivar = ivar_chains;
14489 ivar = TREE_CHAIN (member);
14490 TREE_CHAIN (member) = NULL_TREE;
14491 finish_member_declaration (member);
14496 /* If the next token is `static_assert' we have a static assertion. */
14497 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_STATIC_ASSERT))
14499 cp_parser_static_assert (parser, /*member_p=*/true);
14503 if (cp_parser_using_declaration (parser, /*access_declaration=*/true))
14506 /* Parse the decl-specifier-seq. */
14507 cp_parser_decl_specifier_seq (parser,
14508 CP_PARSER_FLAGS_OPTIONAL,
14510 &declares_class_or_enum);
14511 prefix_attributes = decl_specifiers.attributes;
14512 decl_specifiers.attributes = NULL_TREE;
14513 /* Check for an invalid type-name. */
14514 if (!decl_specifiers.type
14515 && cp_parser_parse_and_diagnose_invalid_type_name (parser))
14517 /* If there is no declarator, then the decl-specifier-seq should
14519 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
14521 /* If there was no decl-specifier-seq, and the next token is a
14522 `;', then we have something like:
14528 Each member-declaration shall declare at least one member
14529 name of the class. */
14530 if (!decl_specifiers.any_specifiers_p)
14532 cp_token *token = cp_lexer_peek_token (parser->lexer);
14533 if (pedantic && !token->in_system_header)
14534 pedwarn ("%Hextra %<;%>", &token->location);
14540 /* See if this declaration is a friend. */
14541 friend_p = cp_parser_friend_p (&decl_specifiers);
14542 /* If there were decl-specifiers, check to see if there was
14543 a class-declaration. */
14544 type = check_tag_decl (&decl_specifiers);
14545 /* Nested classes have already been added to the class, but
14546 a `friend' needs to be explicitly registered. */
14549 /* If the `friend' keyword was present, the friend must
14550 be introduced with a class-key. */
14551 if (!declares_class_or_enum)
14552 error ("a class-key must be used when declaring a friend");
14555 template <typename T> struct A {
14556 friend struct A<T>::B;
14559 A<T>::B will be represented by a TYPENAME_TYPE, and
14560 therefore not recognized by check_tag_decl. */
14562 && decl_specifiers.type
14563 && TYPE_P (decl_specifiers.type))
14564 type = decl_specifiers.type;
14565 if (!type || !TYPE_P (type))
14566 error ("friend declaration does not name a class or "
14569 make_friend_class (current_class_type, type,
14570 /*complain=*/true);
14572 /* If there is no TYPE, an error message will already have
14574 else if (!type || type == error_mark_node)
14576 /* An anonymous aggregate has to be handled specially; such
14577 a declaration really declares a data member (with a
14578 particular type), as opposed to a nested class. */
14579 else if (ANON_AGGR_TYPE_P (type))
14581 /* Remove constructors and such from TYPE, now that we
14582 know it is an anonymous aggregate. */
14583 fixup_anonymous_aggr (type);
14584 /* And make the corresponding data member. */
14585 decl = build_decl (FIELD_DECL, NULL_TREE, type);
14586 /* Add it to the class. */
14587 finish_member_declaration (decl);
14590 cp_parser_check_access_in_redeclaration (TYPE_NAME (type));
14595 /* See if these declarations will be friends. */
14596 friend_p = cp_parser_friend_p (&decl_specifiers);
14598 /* Keep going until we hit the `;' at the end of the
14600 while (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
14602 tree attributes = NULL_TREE;
14603 tree first_attribute;
14605 /* Peek at the next token. */
14606 token = cp_lexer_peek_token (parser->lexer);
14608 /* Check for a bitfield declaration. */
14609 if (token->type == CPP_COLON
14610 || (token->type == CPP_NAME
14611 && cp_lexer_peek_nth_token (parser->lexer, 2)->type
14617 /* Get the name of the bitfield. Note that we cannot just
14618 check TOKEN here because it may have been invalidated by
14619 the call to cp_lexer_peek_nth_token above. */
14620 if (cp_lexer_peek_token (parser->lexer)->type != CPP_COLON)
14621 identifier = cp_parser_identifier (parser);
14623 identifier = NULL_TREE;
14625 /* Consume the `:' token. */
14626 cp_lexer_consume_token (parser->lexer);
14627 /* Get the width of the bitfield. */
14629 = cp_parser_constant_expression (parser,
14630 /*allow_non_constant=*/false,
14633 /* Look for attributes that apply to the bitfield. */
14634 attributes = cp_parser_attributes_opt (parser);
14635 /* Remember which attributes are prefix attributes and
14637 first_attribute = attributes;
14638 /* Combine the attributes. */
14639 attributes = chainon (prefix_attributes, attributes);
14641 /* Create the bitfield declaration. */
14642 decl = grokbitfield (identifier
14643 ? make_id_declarator (NULL_TREE,
14649 /* Apply the attributes. */
14650 cplus_decl_attributes (&decl, attributes, /*flags=*/0);
14654 cp_declarator *declarator;
14656 tree asm_specification;
14657 int ctor_dtor_or_conv_p;
14659 /* Parse the declarator. */
14661 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
14662 &ctor_dtor_or_conv_p,
14663 /*parenthesized_p=*/NULL,
14664 /*member_p=*/true);
14666 /* If something went wrong parsing the declarator, make sure
14667 that we at least consume some tokens. */
14668 if (declarator == cp_error_declarator)
14670 /* Skip to the end of the statement. */
14671 cp_parser_skip_to_end_of_statement (parser);
14672 /* If the next token is not a semicolon, that is
14673 probably because we just skipped over the body of
14674 a function. So, we consume a semicolon if
14675 present, but do not issue an error message if it
14677 if (cp_lexer_next_token_is (parser->lexer,
14679 cp_lexer_consume_token (parser->lexer);
14683 if (declares_class_or_enum & 2)
14684 cp_parser_check_for_definition_in_return_type
14685 (declarator, decl_specifiers.type);
14687 /* Look for an asm-specification. */
14688 asm_specification = cp_parser_asm_specification_opt (parser);
14689 /* Look for attributes that apply to the declaration. */
14690 attributes = cp_parser_attributes_opt (parser);
14691 /* Remember which attributes are prefix attributes and
14693 first_attribute = attributes;
14694 /* Combine the attributes. */
14695 attributes = chainon (prefix_attributes, attributes);
14697 /* If it's an `=', then we have a constant-initializer or a
14698 pure-specifier. It is not correct to parse the
14699 initializer before registering the member declaration
14700 since the member declaration should be in scope while
14701 its initializer is processed. However, the rest of the
14702 front end does not yet provide an interface that allows
14703 us to handle this correctly. */
14704 if (cp_lexer_next_token_is (parser->lexer, CPP_EQ))
14708 A pure-specifier shall be used only in the declaration of
14709 a virtual function.
14711 A member-declarator can contain a constant-initializer
14712 only if it declares a static member of integral or
14715 Therefore, if the DECLARATOR is for a function, we look
14716 for a pure-specifier; otherwise, we look for a
14717 constant-initializer. When we call `grokfield', it will
14718 perform more stringent semantics checks. */
14719 if (function_declarator_p (declarator))
14720 initializer = cp_parser_pure_specifier (parser);
14722 /* Parse the initializer. */
14723 initializer = cp_parser_constant_initializer (parser);
14725 /* Otherwise, there is no initializer. */
14727 initializer = NULL_TREE;
14729 /* See if we are probably looking at a function
14730 definition. We are certainly not looking at a
14731 member-declarator. Calling `grokfield' has
14732 side-effects, so we must not do it unless we are sure
14733 that we are looking at a member-declarator. */
14734 if (cp_parser_token_starts_function_definition_p
14735 (cp_lexer_peek_token (parser->lexer)))
14737 /* The grammar does not allow a pure-specifier to be
14738 used when a member function is defined. (It is
14739 possible that this fact is an oversight in the
14740 standard, since a pure function may be defined
14741 outside of the class-specifier. */
14743 error ("pure-specifier on function-definition");
14744 decl = cp_parser_save_member_function_body (parser,
14748 /* If the member was not a friend, declare it here. */
14750 finish_member_declaration (decl);
14751 /* Peek at the next token. */
14752 token = cp_lexer_peek_token (parser->lexer);
14753 /* If the next token is a semicolon, consume it. */
14754 if (token->type == CPP_SEMICOLON)
14756 if (pedantic && !in_system_header)
14757 pedwarn ("extra %<;%>");
14758 cp_lexer_consume_token (parser->lexer);
14763 /* Create the declaration. */
14764 decl = grokfield (declarator, &decl_specifiers,
14765 initializer, /*init_const_expr_p=*/true,
14770 /* Reset PREFIX_ATTRIBUTES. */
14771 while (attributes && TREE_CHAIN (attributes) != first_attribute)
14772 attributes = TREE_CHAIN (attributes);
14774 TREE_CHAIN (attributes) = NULL_TREE;
14776 /* If there is any qualification still in effect, clear it
14777 now; we will be starting fresh with the next declarator. */
14778 parser->scope = NULL_TREE;
14779 parser->qualifying_scope = NULL_TREE;
14780 parser->object_scope = NULL_TREE;
14781 /* If it's a `,', then there are more declarators. */
14782 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
14783 cp_lexer_consume_token (parser->lexer);
14784 /* If the next token isn't a `;', then we have a parse error. */
14785 else if (cp_lexer_next_token_is_not (parser->lexer,
14788 cp_parser_error (parser, "expected %<;%>");
14789 /* Skip tokens until we find a `;'. */
14790 cp_parser_skip_to_end_of_statement (parser);
14797 /* Add DECL to the list of members. */
14799 finish_member_declaration (decl);
14801 if (TREE_CODE (decl) == FUNCTION_DECL)
14802 cp_parser_save_default_args (parser, decl);
14807 cp_parser_require (parser, CPP_SEMICOLON, "`;'");
14810 /* Parse a pure-specifier.
14815 Returns INTEGER_ZERO_NODE if a pure specifier is found.
14816 Otherwise, ERROR_MARK_NODE is returned. */
14819 cp_parser_pure_specifier (cp_parser* parser)
14823 /* Look for the `=' token. */
14824 if (!cp_parser_require (parser, CPP_EQ, "`='"))
14825 return error_mark_node;
14826 /* Look for the `0' token. */
14827 token = cp_lexer_consume_token (parser->lexer);
14828 /* c_lex_with_flags marks a single digit '0' with PURE_ZERO. */
14829 if (token->type != CPP_NUMBER || !(token->flags & PURE_ZERO))
14831 cp_parser_error (parser,
14832 "invalid pure specifier (only `= 0' is allowed)");
14833 cp_parser_skip_to_end_of_statement (parser);
14834 return error_mark_node;
14836 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
14838 error ("templates may not be %<virtual%>");
14839 return error_mark_node;
14842 return integer_zero_node;
14845 /* Parse a constant-initializer.
14847 constant-initializer:
14848 = constant-expression
14850 Returns a representation of the constant-expression. */
14853 cp_parser_constant_initializer (cp_parser* parser)
14855 /* Look for the `=' token. */
14856 if (!cp_parser_require (parser, CPP_EQ, "`='"))
14857 return error_mark_node;
14859 /* It is invalid to write:
14861 struct S { static const int i = { 7 }; };
14864 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE))
14866 cp_parser_error (parser,
14867 "a brace-enclosed initializer is not allowed here");
14868 /* Consume the opening brace. */
14869 cp_lexer_consume_token (parser->lexer);
14870 /* Skip the initializer. */
14871 cp_parser_skip_to_closing_brace (parser);
14872 /* Look for the trailing `}'. */
14873 cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'");
14875 return error_mark_node;
14878 return cp_parser_constant_expression (parser,
14879 /*allow_non_constant=*/false,
14883 /* Derived classes [gram.class.derived] */
14885 /* Parse a base-clause.
14888 : base-specifier-list
14890 base-specifier-list:
14891 base-specifier ... [opt]
14892 base-specifier-list , base-specifier ... [opt]
14894 Returns a TREE_LIST representing the base-classes, in the order in
14895 which they were declared. The representation of each node is as
14896 described by cp_parser_base_specifier.
14898 In the case that no bases are specified, this function will return
14899 NULL_TREE, not ERROR_MARK_NODE. */
14902 cp_parser_base_clause (cp_parser* parser)
14904 tree bases = NULL_TREE;
14906 /* Look for the `:' that begins the list. */
14907 cp_parser_require (parser, CPP_COLON, "`:'");
14909 /* Scan the base-specifier-list. */
14914 bool pack_expansion_p = false;
14916 /* Look for the base-specifier. */
14917 base = cp_parser_base_specifier (parser);
14918 /* Look for the (optional) ellipsis. */
14919 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
14921 /* Consume the `...'. */
14922 cp_lexer_consume_token (parser->lexer);
14924 pack_expansion_p = true;
14927 /* Add BASE to the front of the list. */
14928 if (base != error_mark_node)
14930 if (pack_expansion_p)
14931 /* Make this a pack expansion type. */
14932 TREE_VALUE (base) = make_pack_expansion (TREE_VALUE (base));
14934 check_for_bare_parameter_packs (TREE_VALUE (base));
14936 TREE_CHAIN (base) = bases;
14939 /* Peek at the next token. */
14940 token = cp_lexer_peek_token (parser->lexer);
14941 /* If it's not a comma, then the list is complete. */
14942 if (token->type != CPP_COMMA)
14944 /* Consume the `,'. */
14945 cp_lexer_consume_token (parser->lexer);
14948 /* PARSER->SCOPE may still be non-NULL at this point, if the last
14949 base class had a qualified name. However, the next name that
14950 appears is certainly not qualified. */
14951 parser->scope = NULL_TREE;
14952 parser->qualifying_scope = NULL_TREE;
14953 parser->object_scope = NULL_TREE;
14955 return nreverse (bases);
14958 /* Parse a base-specifier.
14961 :: [opt] nested-name-specifier [opt] class-name
14962 virtual access-specifier [opt] :: [opt] nested-name-specifier
14964 access-specifier virtual [opt] :: [opt] nested-name-specifier
14967 Returns a TREE_LIST. The TREE_PURPOSE will be one of
14968 ACCESS_{DEFAULT,PUBLIC,PROTECTED,PRIVATE}_[VIRTUAL]_NODE to
14969 indicate the specifiers provided. The TREE_VALUE will be a TYPE
14970 (or the ERROR_MARK_NODE) indicating the type that was specified. */
14973 cp_parser_base_specifier (cp_parser* parser)
14977 bool virtual_p = false;
14978 bool duplicate_virtual_error_issued_p = false;
14979 bool duplicate_access_error_issued_p = false;
14980 bool class_scope_p, template_p;
14981 tree access = access_default_node;
14984 /* Process the optional `virtual' and `access-specifier'. */
14987 /* Peek at the next token. */
14988 token = cp_lexer_peek_token (parser->lexer);
14989 /* Process `virtual'. */
14990 switch (token->keyword)
14993 /* If `virtual' appears more than once, issue an error. */
14994 if (virtual_p && !duplicate_virtual_error_issued_p)
14996 cp_parser_error (parser,
14997 "%<virtual%> specified more than once in base-specified");
14998 duplicate_virtual_error_issued_p = true;
15003 /* Consume the `virtual' token. */
15004 cp_lexer_consume_token (parser->lexer);
15009 case RID_PROTECTED:
15011 /* If more than one access specifier appears, issue an
15013 if (access != access_default_node
15014 && !duplicate_access_error_issued_p)
15016 cp_parser_error (parser,
15017 "more than one access specifier in base-specified");
15018 duplicate_access_error_issued_p = true;
15021 access = ridpointers[(int) token->keyword];
15023 /* Consume the access-specifier. */
15024 cp_lexer_consume_token (parser->lexer);
15033 /* It is not uncommon to see programs mechanically, erroneously, use
15034 the 'typename' keyword to denote (dependent) qualified types
15035 as base classes. */
15036 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TYPENAME))
15038 if (!processing_template_decl)
15039 error ("keyword %<typename%> not allowed outside of templates");
15041 error ("keyword %<typename%> not allowed in this context "
15042 "(the base class is implicitly a type)");
15043 cp_lexer_consume_token (parser->lexer);
15046 /* Look for the optional `::' operator. */
15047 cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false);
15048 /* Look for the nested-name-specifier. The simplest way to
15053 The keyword `typename' is not permitted in a base-specifier or
15054 mem-initializer; in these contexts a qualified name that
15055 depends on a template-parameter is implicitly assumed to be a
15058 is to pretend that we have seen the `typename' keyword at this
15060 cp_parser_nested_name_specifier_opt (parser,
15061 /*typename_keyword_p=*/true,
15062 /*check_dependency_p=*/true,
15064 /*is_declaration=*/true);
15065 /* If the base class is given by a qualified name, assume that names
15066 we see are type names or templates, as appropriate. */
15067 class_scope_p = (parser->scope && TYPE_P (parser->scope));
15068 template_p = class_scope_p && cp_parser_optional_template_keyword (parser);
15070 /* Finally, look for the class-name. */
15071 type = cp_parser_class_name (parser,
15075 /*check_dependency_p=*/true,
15076 /*class_head_p=*/false,
15077 /*is_declaration=*/true);
15079 if (type == error_mark_node)
15080 return error_mark_node;
15082 return finish_base_specifier (TREE_TYPE (type), access, virtual_p);
15085 /* Exception handling [gram.exception] */
15087 /* Parse an (optional) exception-specification.
15089 exception-specification:
15090 throw ( type-id-list [opt] )
15092 Returns a TREE_LIST representing the exception-specification. The
15093 TREE_VALUE of each node is a type. */
15096 cp_parser_exception_specification_opt (cp_parser* parser)
15101 /* Peek at the next token. */
15102 token = cp_lexer_peek_token (parser->lexer);
15103 /* If it's not `throw', then there's no exception-specification. */
15104 if (!cp_parser_is_keyword (token, RID_THROW))
15107 /* Consume the `throw'. */
15108 cp_lexer_consume_token (parser->lexer);
15110 /* Look for the `('. */
15111 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
15113 /* Peek at the next token. */
15114 token = cp_lexer_peek_token (parser->lexer);
15115 /* If it's not a `)', then there is a type-id-list. */
15116 if (token->type != CPP_CLOSE_PAREN)
15118 const char *saved_message;
15120 /* Types may not be defined in an exception-specification. */
15121 saved_message = parser->type_definition_forbidden_message;
15122 parser->type_definition_forbidden_message
15123 = "types may not be defined in an exception-specification";
15124 /* Parse the type-id-list. */
15125 type_id_list = cp_parser_type_id_list (parser);
15126 /* Restore the saved message. */
15127 parser->type_definition_forbidden_message = saved_message;
15130 type_id_list = empty_except_spec;
15132 /* Look for the `)'. */
15133 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
15135 return type_id_list;
15138 /* Parse an (optional) type-id-list.
15142 type-id-list , type-id ... [opt]
15144 Returns a TREE_LIST. The TREE_VALUE of each node is a TYPE,
15145 in the order that the types were presented. */
15148 cp_parser_type_id_list (cp_parser* parser)
15150 tree types = NULL_TREE;
15157 /* Get the next type-id. */
15158 type = cp_parser_type_id (parser);
15159 /* Parse the optional ellipsis. */
15160 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
15162 /* Consume the `...'. */
15163 cp_lexer_consume_token (parser->lexer);
15165 /* Turn the type into a pack expansion expression. */
15166 type = make_pack_expansion (type);
15168 /* Add it to the list. */
15169 types = add_exception_specifier (types, type, /*complain=*/1);
15170 /* Peek at the next token. */
15171 token = cp_lexer_peek_token (parser->lexer);
15172 /* If it is not a `,', we are done. */
15173 if (token->type != CPP_COMMA)
15175 /* Consume the `,'. */
15176 cp_lexer_consume_token (parser->lexer);
15179 return nreverse (types);
15182 /* Parse a try-block.
15185 try compound-statement handler-seq */
15188 cp_parser_try_block (cp_parser* parser)
15192 cp_parser_require_keyword (parser, RID_TRY, "`try'");
15193 try_block = begin_try_block ();
15194 cp_parser_compound_statement (parser, NULL, true);
15195 finish_try_block (try_block);
15196 cp_parser_handler_seq (parser);
15197 finish_handler_sequence (try_block);
15202 /* Parse a function-try-block.
15204 function-try-block:
15205 try ctor-initializer [opt] function-body handler-seq */
15208 cp_parser_function_try_block (cp_parser* parser)
15210 tree compound_stmt;
15212 bool ctor_initializer_p;
15214 /* Look for the `try' keyword. */
15215 if (!cp_parser_require_keyword (parser, RID_TRY, "`try'"))
15217 /* Let the rest of the front end know where we are. */
15218 try_block = begin_function_try_block (&compound_stmt);
15219 /* Parse the function-body. */
15221 = cp_parser_ctor_initializer_opt_and_function_body (parser);
15222 /* We're done with the `try' part. */
15223 finish_function_try_block (try_block);
15224 /* Parse the handlers. */
15225 cp_parser_handler_seq (parser);
15226 /* We're done with the handlers. */
15227 finish_function_handler_sequence (try_block, compound_stmt);
15229 return ctor_initializer_p;
15232 /* Parse a handler-seq.
15235 handler handler-seq [opt] */
15238 cp_parser_handler_seq (cp_parser* parser)
15244 /* Parse the handler. */
15245 cp_parser_handler (parser);
15246 /* Peek at the next token. */
15247 token = cp_lexer_peek_token (parser->lexer);
15248 /* If it's not `catch' then there are no more handlers. */
15249 if (!cp_parser_is_keyword (token, RID_CATCH))
15254 /* Parse a handler.
15257 catch ( exception-declaration ) compound-statement */
15260 cp_parser_handler (cp_parser* parser)
15265 cp_parser_require_keyword (parser, RID_CATCH, "`catch'");
15266 handler = begin_handler ();
15267 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
15268 declaration = cp_parser_exception_declaration (parser);
15269 finish_handler_parms (declaration, handler);
15270 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
15271 cp_parser_compound_statement (parser, NULL, false);
15272 finish_handler (handler);
15275 /* Parse an exception-declaration.
15277 exception-declaration:
15278 type-specifier-seq declarator
15279 type-specifier-seq abstract-declarator
15283 Returns a VAR_DECL for the declaration, or NULL_TREE if the
15284 ellipsis variant is used. */
15287 cp_parser_exception_declaration (cp_parser* parser)
15289 cp_decl_specifier_seq type_specifiers;
15290 cp_declarator *declarator;
15291 const char *saved_message;
15293 /* If it's an ellipsis, it's easy to handle. */
15294 if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
15296 /* Consume the `...' token. */
15297 cp_lexer_consume_token (parser->lexer);
15301 /* Types may not be defined in exception-declarations. */
15302 saved_message = parser->type_definition_forbidden_message;
15303 parser->type_definition_forbidden_message
15304 = "types may not be defined in exception-declarations";
15306 /* Parse the type-specifier-seq. */
15307 cp_parser_type_specifier_seq (parser, /*is_condition=*/false,
15309 /* If it's a `)', then there is no declarator. */
15310 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_PAREN))
15313 declarator = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_EITHER,
15314 /*ctor_dtor_or_conv_p=*/NULL,
15315 /*parenthesized_p=*/NULL,
15316 /*member_p=*/false);
15318 /* Restore the saved message. */
15319 parser->type_definition_forbidden_message = saved_message;
15321 if (!type_specifiers.any_specifiers_p)
15322 return error_mark_node;
15324 return grokdeclarator (declarator, &type_specifiers, CATCHPARM, 1, NULL);
15327 /* Parse a throw-expression.
15330 throw assignment-expression [opt]
15332 Returns a THROW_EXPR representing the throw-expression. */
15335 cp_parser_throw_expression (cp_parser* parser)
15340 cp_parser_require_keyword (parser, RID_THROW, "`throw'");
15341 token = cp_lexer_peek_token (parser->lexer);
15342 /* Figure out whether or not there is an assignment-expression
15343 following the "throw" keyword. */
15344 if (token->type == CPP_COMMA
15345 || token->type == CPP_SEMICOLON
15346 || token->type == CPP_CLOSE_PAREN
15347 || token->type == CPP_CLOSE_SQUARE
15348 || token->type == CPP_CLOSE_BRACE
15349 || token->type == CPP_COLON)
15350 expression = NULL_TREE;
15352 expression = cp_parser_assignment_expression (parser,
15355 return build_throw (expression);
15358 /* GNU Extensions */
15360 /* Parse an (optional) asm-specification.
15363 asm ( string-literal )
15365 If the asm-specification is present, returns a STRING_CST
15366 corresponding to the string-literal. Otherwise, returns
15370 cp_parser_asm_specification_opt (cp_parser* parser)
15373 tree asm_specification;
15375 /* Peek at the next token. */
15376 token = cp_lexer_peek_token (parser->lexer);
15377 /* If the next token isn't the `asm' keyword, then there's no
15378 asm-specification. */
15379 if (!cp_parser_is_keyword (token, RID_ASM))
15382 /* Consume the `asm' token. */
15383 cp_lexer_consume_token (parser->lexer);
15384 /* Look for the `('. */
15385 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
15387 /* Look for the string-literal. */
15388 asm_specification = cp_parser_string_literal (parser, false, false);
15390 /* Look for the `)'. */
15391 cp_parser_require (parser, CPP_CLOSE_PAREN, "`('");
15393 return asm_specification;
15396 /* Parse an asm-operand-list.
15400 asm-operand-list , asm-operand
15403 string-literal ( expression )
15404 [ string-literal ] string-literal ( expression )
15406 Returns a TREE_LIST representing the operands. The TREE_VALUE of
15407 each node is the expression. The TREE_PURPOSE is itself a
15408 TREE_LIST whose TREE_PURPOSE is a STRING_CST for the bracketed
15409 string-literal (or NULL_TREE if not present) and whose TREE_VALUE
15410 is a STRING_CST for the string literal before the parenthesis. */
15413 cp_parser_asm_operand_list (cp_parser* parser)
15415 tree asm_operands = NULL_TREE;
15419 tree string_literal;
15423 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE))
15425 /* Consume the `[' token. */
15426 cp_lexer_consume_token (parser->lexer);
15427 /* Read the operand name. */
15428 name = cp_parser_identifier (parser);
15429 if (name != error_mark_node)
15430 name = build_string (IDENTIFIER_LENGTH (name),
15431 IDENTIFIER_POINTER (name));
15432 /* Look for the closing `]'. */
15433 cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'");
15437 /* Look for the string-literal. */
15438 string_literal = cp_parser_string_literal (parser, false, false);
15440 /* Look for the `('. */
15441 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
15442 /* Parse the expression. */
15443 expression = cp_parser_expression (parser, /*cast_p=*/false);
15444 /* Look for the `)'. */
15445 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
15447 /* Add this operand to the list. */
15448 asm_operands = tree_cons (build_tree_list (name, string_literal),
15451 /* If the next token is not a `,', there are no more
15453 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
15455 /* Consume the `,'. */
15456 cp_lexer_consume_token (parser->lexer);
15459 return nreverse (asm_operands);
15462 /* Parse an asm-clobber-list.
15466 asm-clobber-list , string-literal
15468 Returns a TREE_LIST, indicating the clobbers in the order that they
15469 appeared. The TREE_VALUE of each node is a STRING_CST. */
15472 cp_parser_asm_clobber_list (cp_parser* parser)
15474 tree clobbers = NULL_TREE;
15478 tree string_literal;
15480 /* Look for the string literal. */
15481 string_literal = cp_parser_string_literal (parser, false, false);
15482 /* Add it to the list. */
15483 clobbers = tree_cons (NULL_TREE, string_literal, clobbers);
15484 /* If the next token is not a `,', then the list is
15486 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
15488 /* Consume the `,' token. */
15489 cp_lexer_consume_token (parser->lexer);
15495 /* Parse an (optional) series of attributes.
15498 attributes attribute
15501 __attribute__ (( attribute-list [opt] ))
15503 The return value is as for cp_parser_attribute_list. */
15506 cp_parser_attributes_opt (cp_parser* parser)
15508 tree attributes = NULL_TREE;
15513 tree attribute_list;
15515 /* Peek at the next token. */
15516 token = cp_lexer_peek_token (parser->lexer);
15517 /* If it's not `__attribute__', then we're done. */
15518 if (token->keyword != RID_ATTRIBUTE)
15521 /* Consume the `__attribute__' keyword. */
15522 cp_lexer_consume_token (parser->lexer);
15523 /* Look for the two `(' tokens. */
15524 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
15525 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
15527 /* Peek at the next token. */
15528 token = cp_lexer_peek_token (parser->lexer);
15529 if (token->type != CPP_CLOSE_PAREN)
15530 /* Parse the attribute-list. */
15531 attribute_list = cp_parser_attribute_list (parser);
15533 /* If the next token is a `)', then there is no attribute
15535 attribute_list = NULL;
15537 /* Look for the two `)' tokens. */
15538 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
15539 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
15541 /* Add these new attributes to the list. */
15542 attributes = chainon (attributes, attribute_list);
15548 /* Parse an attribute-list.
15552 attribute-list , attribute
15556 identifier ( identifier )
15557 identifier ( identifier , expression-list )
15558 identifier ( expression-list )
15560 Returns a TREE_LIST, or NULL_TREE on error. Each node corresponds
15561 to an attribute. The TREE_PURPOSE of each node is the identifier
15562 indicating which attribute is in use. The TREE_VALUE represents
15563 the arguments, if any. */
15566 cp_parser_attribute_list (cp_parser* parser)
15568 tree attribute_list = NULL_TREE;
15569 bool save_translate_strings_p = parser->translate_strings_p;
15571 parser->translate_strings_p = false;
15578 /* Look for the identifier. We also allow keywords here; for
15579 example `__attribute__ ((const))' is legal. */
15580 token = cp_lexer_peek_token (parser->lexer);
15581 if (token->type == CPP_NAME
15582 || token->type == CPP_KEYWORD)
15584 tree arguments = NULL_TREE;
15586 /* Consume the token. */
15587 token = cp_lexer_consume_token (parser->lexer);
15589 /* Save away the identifier that indicates which attribute
15591 identifier = token->u.value;
15592 attribute = build_tree_list (identifier, NULL_TREE);
15594 /* Peek at the next token. */
15595 token = cp_lexer_peek_token (parser->lexer);
15596 /* If it's an `(', then parse the attribute arguments. */
15597 if (token->type == CPP_OPEN_PAREN)
15599 arguments = cp_parser_parenthesized_expression_list
15600 (parser, true, /*cast_p=*/false,
15601 /*allow_expansion_p=*/false,
15602 /*non_constant_p=*/NULL);
15603 /* Save the arguments away. */
15604 TREE_VALUE (attribute) = arguments;
15607 if (arguments != error_mark_node)
15609 /* Add this attribute to the list. */
15610 TREE_CHAIN (attribute) = attribute_list;
15611 attribute_list = attribute;
15614 token = cp_lexer_peek_token (parser->lexer);
15616 /* Now, look for more attributes. If the next token isn't a
15617 `,', we're done. */
15618 if (token->type != CPP_COMMA)
15621 /* Consume the comma and keep going. */
15622 cp_lexer_consume_token (parser->lexer);
15624 parser->translate_strings_p = save_translate_strings_p;
15626 /* We built up the list in reverse order. */
15627 return nreverse (attribute_list);
15630 /* Parse an optional `__extension__' keyword. Returns TRUE if it is
15631 present, and FALSE otherwise. *SAVED_PEDANTIC is set to the
15632 current value of the PEDANTIC flag, regardless of whether or not
15633 the `__extension__' keyword is present. The caller is responsible
15634 for restoring the value of the PEDANTIC flag. */
15637 cp_parser_extension_opt (cp_parser* parser, int* saved_pedantic)
15639 /* Save the old value of the PEDANTIC flag. */
15640 *saved_pedantic = pedantic;
15642 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_EXTENSION))
15644 /* Consume the `__extension__' token. */
15645 cp_lexer_consume_token (parser->lexer);
15646 /* We're not being pedantic while the `__extension__' keyword is
15656 /* Parse a label declaration.
15659 __label__ label-declarator-seq ;
15661 label-declarator-seq:
15662 identifier , label-declarator-seq
15666 cp_parser_label_declaration (cp_parser* parser)
15668 /* Look for the `__label__' keyword. */
15669 cp_parser_require_keyword (parser, RID_LABEL, "`__label__'");
15675 /* Look for an identifier. */
15676 identifier = cp_parser_identifier (parser);
15677 /* If we failed, stop. */
15678 if (identifier == error_mark_node)
15680 /* Declare it as a label. */
15681 finish_label_decl (identifier);
15682 /* If the next token is a `;', stop. */
15683 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
15685 /* Look for the `,' separating the label declarations. */
15686 cp_parser_require (parser, CPP_COMMA, "`,'");
15689 /* Look for the final `;'. */
15690 cp_parser_require (parser, CPP_SEMICOLON, "`;'");
15693 /* Support Functions */
15695 /* Looks up NAME in the current scope, as given by PARSER->SCOPE.
15696 NAME should have one of the representations used for an
15697 id-expression. If NAME is the ERROR_MARK_NODE, the ERROR_MARK_NODE
15698 is returned. If PARSER->SCOPE is a dependent type, then a
15699 SCOPE_REF is returned.
15701 If NAME is a TEMPLATE_ID_EXPR, then it will be immediately
15702 returned; the name was already resolved when the TEMPLATE_ID_EXPR
15703 was formed. Abstractly, such entities should not be passed to this
15704 function, because they do not need to be looked up, but it is
15705 simpler to check for this special case here, rather than at the
15708 In cases not explicitly covered above, this function returns a
15709 DECL, OVERLOAD, or baselink representing the result of the lookup.
15710 If there was no entity with the indicated NAME, the ERROR_MARK_NODE
15713 If TAG_TYPE is not NONE_TYPE, it indicates an explicit type keyword
15714 (e.g., "struct") that was used. In that case bindings that do not
15715 refer to types are ignored.
15717 If IS_TEMPLATE is TRUE, bindings that do not refer to templates are
15720 If IS_NAMESPACE is TRUE, bindings that do not refer to namespaces
15723 If CHECK_DEPENDENCY is TRUE, names are not looked up in dependent
15726 If AMBIGUOUS_DECLS is non-NULL, *AMBIGUOUS_DECLS is set to a
15727 TREE_LIST of candidates if name-lookup results in an ambiguity, and
15728 NULL_TREE otherwise. */
15731 cp_parser_lookup_name (cp_parser *parser, tree name,
15732 enum tag_types tag_type,
15735 bool check_dependency,
15736 tree *ambiguous_decls)
15740 tree object_type = parser->context->object_type;
15742 if (!cp_parser_uncommitted_to_tentative_parse_p (parser))
15743 flags |= LOOKUP_COMPLAIN;
15745 /* Assume that the lookup will be unambiguous. */
15746 if (ambiguous_decls)
15747 *ambiguous_decls = NULL_TREE;
15749 /* Now that we have looked up the name, the OBJECT_TYPE (if any) is
15750 no longer valid. Note that if we are parsing tentatively, and
15751 the parse fails, OBJECT_TYPE will be automatically restored. */
15752 parser->context->object_type = NULL_TREE;
15754 if (name == error_mark_node)
15755 return error_mark_node;
15757 /* A template-id has already been resolved; there is no lookup to
15759 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
15761 if (BASELINK_P (name))
15763 gcc_assert (TREE_CODE (BASELINK_FUNCTIONS (name))
15764 == TEMPLATE_ID_EXPR);
15768 /* A BIT_NOT_EXPR is used to represent a destructor. By this point,
15769 it should already have been checked to make sure that the name
15770 used matches the type being destroyed. */
15771 if (TREE_CODE (name) == BIT_NOT_EXPR)
15775 /* Figure out to which type this destructor applies. */
15777 type = parser->scope;
15778 else if (object_type)
15779 type = object_type;
15781 type = current_class_type;
15782 /* If that's not a class type, there is no destructor. */
15783 if (!type || !CLASS_TYPE_P (type))
15784 return error_mark_node;
15785 if (CLASSTYPE_LAZY_DESTRUCTOR (type))
15786 lazily_declare_fn (sfk_destructor, type);
15787 if (!CLASSTYPE_DESTRUCTORS (type))
15788 return error_mark_node;
15789 /* If it was a class type, return the destructor. */
15790 return CLASSTYPE_DESTRUCTORS (type);
15793 /* By this point, the NAME should be an ordinary identifier. If
15794 the id-expression was a qualified name, the qualifying scope is
15795 stored in PARSER->SCOPE at this point. */
15796 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
15798 /* Perform the lookup. */
15803 if (parser->scope == error_mark_node)
15804 return error_mark_node;
15806 /* If the SCOPE is dependent, the lookup must be deferred until
15807 the template is instantiated -- unless we are explicitly
15808 looking up names in uninstantiated templates. Even then, we
15809 cannot look up the name if the scope is not a class type; it
15810 might, for example, be a template type parameter. */
15811 dependent_p = (TYPE_P (parser->scope)
15812 && !(parser->in_declarator_p
15813 && currently_open_class (parser->scope))
15814 && dependent_type_p (parser->scope));
15815 if ((check_dependency || !CLASS_TYPE_P (parser->scope))
15822 /* The resolution to Core Issue 180 says that `struct
15823 A::B' should be considered a type-name, even if `A'
15825 type = make_typename_type (parser->scope, name, tag_type,
15826 /*complain=*/tf_error);
15827 decl = TYPE_NAME (type);
15829 else if (is_template
15830 && (cp_parser_next_token_ends_template_argument_p (parser)
15831 || cp_lexer_next_token_is (parser->lexer,
15833 decl = make_unbound_class_template (parser->scope,
15835 /*complain=*/tf_error);
15837 decl = build_qualified_name (/*type=*/NULL_TREE,
15838 parser->scope, name,
15843 tree pushed_scope = NULL_TREE;
15845 /* If PARSER->SCOPE is a dependent type, then it must be a
15846 class type, and we must not be checking dependencies;
15847 otherwise, we would have processed this lookup above. So
15848 that PARSER->SCOPE is not considered a dependent base by
15849 lookup_member, we must enter the scope here. */
15851 pushed_scope = push_scope (parser->scope);
15852 /* If the PARSER->SCOPE is a template specialization, it
15853 may be instantiated during name lookup. In that case,
15854 errors may be issued. Even if we rollback the current
15855 tentative parse, those errors are valid. */
15856 decl = lookup_qualified_name (parser->scope, name,
15857 tag_type != none_type,
15858 /*complain=*/true);
15860 pop_scope (pushed_scope);
15862 parser->qualifying_scope = parser->scope;
15863 parser->object_scope = NULL_TREE;
15865 else if (object_type)
15867 tree object_decl = NULL_TREE;
15868 /* Look up the name in the scope of the OBJECT_TYPE, unless the
15869 OBJECT_TYPE is not a class. */
15870 if (CLASS_TYPE_P (object_type))
15871 /* If the OBJECT_TYPE is a template specialization, it may
15872 be instantiated during name lookup. In that case, errors
15873 may be issued. Even if we rollback the current tentative
15874 parse, those errors are valid. */
15875 object_decl = lookup_member (object_type,
15878 tag_type != none_type);
15879 /* Look it up in the enclosing context, too. */
15880 decl = lookup_name_real (name, tag_type != none_type,
15882 /*block_p=*/true, is_namespace, flags);
15883 parser->object_scope = object_type;
15884 parser->qualifying_scope = NULL_TREE;
15886 decl = object_decl;
15890 decl = lookup_name_real (name, tag_type != none_type,
15892 /*block_p=*/true, is_namespace, flags);
15893 parser->qualifying_scope = NULL_TREE;
15894 parser->object_scope = NULL_TREE;
15897 /* If the lookup failed, let our caller know. */
15898 if (!decl || decl == error_mark_node)
15899 return error_mark_node;
15901 /* If it's a TREE_LIST, the result of the lookup was ambiguous. */
15902 if (TREE_CODE (decl) == TREE_LIST)
15904 if (ambiguous_decls)
15905 *ambiguous_decls = decl;
15906 /* The error message we have to print is too complicated for
15907 cp_parser_error, so we incorporate its actions directly. */
15908 if (!cp_parser_simulate_error (parser))
15910 error ("reference to %qD is ambiguous", name);
15911 print_candidates (decl);
15913 return error_mark_node;
15916 gcc_assert (DECL_P (decl)
15917 || TREE_CODE (decl) == OVERLOAD
15918 || TREE_CODE (decl) == SCOPE_REF
15919 || TREE_CODE (decl) == UNBOUND_CLASS_TEMPLATE
15920 || BASELINK_P (decl));
15922 /* If we have resolved the name of a member declaration, check to
15923 see if the declaration is accessible. When the name resolves to
15924 set of overloaded functions, accessibility is checked when
15925 overload resolution is done.
15927 During an explicit instantiation, access is not checked at all,
15928 as per [temp.explicit]. */
15930 check_accessibility_of_qualified_id (decl, object_type, parser->scope);
15935 /* Like cp_parser_lookup_name, but for use in the typical case where
15936 CHECK_ACCESS is TRUE, IS_TYPE is FALSE, IS_TEMPLATE is FALSE,
15937 IS_NAMESPACE is FALSE, and CHECK_DEPENDENCY is TRUE. */
15940 cp_parser_lookup_name_simple (cp_parser* parser, tree name)
15942 return cp_parser_lookup_name (parser, name,
15944 /*is_template=*/false,
15945 /*is_namespace=*/false,
15946 /*check_dependency=*/true,
15947 /*ambiguous_decls=*/NULL);
15950 /* If DECL is a TEMPLATE_DECL that can be treated like a TYPE_DECL in
15951 the current context, return the TYPE_DECL. If TAG_NAME_P is
15952 true, the DECL indicates the class being defined in a class-head,
15953 or declared in an elaborated-type-specifier.
15955 Otherwise, return DECL. */
15958 cp_parser_maybe_treat_template_as_class (tree decl, bool tag_name_p)
15960 /* If the TEMPLATE_DECL is being declared as part of a class-head,
15961 the translation from TEMPLATE_DECL to TYPE_DECL occurs:
15964 template <typename T> struct B;
15967 template <typename T> struct A::B {};
15969 Similarly, in an elaborated-type-specifier:
15971 namespace N { struct X{}; }
15974 template <typename T> friend struct N::X;
15977 However, if the DECL refers to a class type, and we are in
15978 the scope of the class, then the name lookup automatically
15979 finds the TYPE_DECL created by build_self_reference rather
15980 than a TEMPLATE_DECL. For example, in:
15982 template <class T> struct S {
15986 there is no need to handle such case. */
15988 if (DECL_CLASS_TEMPLATE_P (decl) && tag_name_p)
15989 return DECL_TEMPLATE_RESULT (decl);
15994 /* If too many, or too few, template-parameter lists apply to the
15995 declarator, issue an error message. Returns TRUE if all went well,
15996 and FALSE otherwise. */
15999 cp_parser_check_declarator_template_parameters (cp_parser* parser,
16000 cp_declarator *declarator)
16002 unsigned num_templates;
16004 /* We haven't seen any classes that involve template parameters yet. */
16007 switch (declarator->kind)
16010 if (declarator->u.id.qualifying_scope)
16015 scope = declarator->u.id.qualifying_scope;
16016 member = declarator->u.id.unqualified_name;
16018 while (scope && CLASS_TYPE_P (scope))
16020 /* You're supposed to have one `template <...>'
16021 for every template class, but you don't need one
16022 for a full specialization. For example:
16024 template <class T> struct S{};
16025 template <> struct S<int> { void f(); };
16026 void S<int>::f () {}
16028 is correct; there shouldn't be a `template <>' for
16029 the definition of `S<int>::f'. */
16030 if (!CLASSTYPE_TEMPLATE_INFO (scope))
16031 /* If SCOPE does not have template information of any
16032 kind, then it is not a template, nor is it nested
16033 within a template. */
16035 if (explicit_class_specialization_p (scope))
16037 if (PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (scope)))
16040 scope = TYPE_CONTEXT (scope);
16043 else if (TREE_CODE (declarator->u.id.unqualified_name)
16044 == TEMPLATE_ID_EXPR)
16045 /* If the DECLARATOR has the form `X<y>' then it uses one
16046 additional level of template parameters. */
16049 return cp_parser_check_template_parameters (parser,
16055 case cdk_reference:
16057 return (cp_parser_check_declarator_template_parameters
16058 (parser, declarator->declarator));
16064 gcc_unreachable ();
16069 /* NUM_TEMPLATES were used in the current declaration. If that is
16070 invalid, return FALSE and issue an error messages. Otherwise,
16074 cp_parser_check_template_parameters (cp_parser* parser,
16075 unsigned num_templates)
16077 /* If there are more template classes than parameter lists, we have
16080 template <class T> void S<T>::R<T>::f (); */
16081 if (parser->num_template_parameter_lists < num_templates)
16083 error ("too few template-parameter-lists");
16086 /* If there are the same number of template classes and parameter
16087 lists, that's OK. */
16088 if (parser->num_template_parameter_lists == num_templates)
16090 /* If there are more, but only one more, then we are referring to a
16091 member template. That's OK too. */
16092 if (parser->num_template_parameter_lists == num_templates + 1)
16094 /* Otherwise, there are too many template parameter lists. We have
16097 template <class T> template <class U> void S::f(); */
16098 error ("too many template-parameter-lists");
16102 /* Parse an optional `::' token indicating that the following name is
16103 from the global namespace. If so, PARSER->SCOPE is set to the
16104 GLOBAL_NAMESPACE. Otherwise, PARSER->SCOPE is set to NULL_TREE,
16105 unless CURRENT_SCOPE_VALID_P is TRUE, in which case it is left alone.
16106 Returns the new value of PARSER->SCOPE, if the `::' token is
16107 present, and NULL_TREE otherwise. */
16110 cp_parser_global_scope_opt (cp_parser* parser, bool current_scope_valid_p)
16114 /* Peek at the next token. */
16115 token = cp_lexer_peek_token (parser->lexer);
16116 /* If we're looking at a `::' token then we're starting from the
16117 global namespace, not our current location. */
16118 if (token->type == CPP_SCOPE)
16120 /* Consume the `::' token. */
16121 cp_lexer_consume_token (parser->lexer);
16122 /* Set the SCOPE so that we know where to start the lookup. */
16123 parser->scope = global_namespace;
16124 parser->qualifying_scope = global_namespace;
16125 parser->object_scope = NULL_TREE;
16127 return parser->scope;
16129 else if (!current_scope_valid_p)
16131 parser->scope = NULL_TREE;
16132 parser->qualifying_scope = NULL_TREE;
16133 parser->object_scope = NULL_TREE;
16139 /* Returns TRUE if the upcoming token sequence is the start of a
16140 constructor declarator. If FRIEND_P is true, the declarator is
16141 preceded by the `friend' specifier. */
16144 cp_parser_constructor_declarator_p (cp_parser *parser, bool friend_p)
16146 bool constructor_p;
16147 tree type_decl = NULL_TREE;
16148 bool nested_name_p;
16149 cp_token *next_token;
16151 /* The common case is that this is not a constructor declarator, so
16152 try to avoid doing lots of work if at all possible. It's not
16153 valid declare a constructor at function scope. */
16154 if (parser->in_function_body)
16156 /* And only certain tokens can begin a constructor declarator. */
16157 next_token = cp_lexer_peek_token (parser->lexer);
16158 if (next_token->type != CPP_NAME
16159 && next_token->type != CPP_SCOPE
16160 && next_token->type != CPP_NESTED_NAME_SPECIFIER
16161 && next_token->type != CPP_TEMPLATE_ID)
16164 /* Parse tentatively; we are going to roll back all of the tokens
16166 cp_parser_parse_tentatively (parser);
16167 /* Assume that we are looking at a constructor declarator. */
16168 constructor_p = true;
16170 /* Look for the optional `::' operator. */
16171 cp_parser_global_scope_opt (parser,
16172 /*current_scope_valid_p=*/false);
16173 /* Look for the nested-name-specifier. */
16175 = (cp_parser_nested_name_specifier_opt (parser,
16176 /*typename_keyword_p=*/false,
16177 /*check_dependency_p=*/false,
16179 /*is_declaration=*/false)
16181 /* Outside of a class-specifier, there must be a
16182 nested-name-specifier. */
16183 if (!nested_name_p &&
16184 (!at_class_scope_p () || !TYPE_BEING_DEFINED (current_class_type)
16186 constructor_p = false;
16187 /* If we still think that this might be a constructor-declarator,
16188 look for a class-name. */
16193 template <typename T> struct S { S(); };
16194 template <typename T> S<T>::S ();
16196 we must recognize that the nested `S' names a class.
16199 template <typename T> S<T>::S<T> ();
16201 we must recognize that the nested `S' names a template. */
16202 type_decl = cp_parser_class_name (parser,
16203 /*typename_keyword_p=*/false,
16204 /*template_keyword_p=*/false,
16206 /*check_dependency_p=*/false,
16207 /*class_head_p=*/false,
16208 /*is_declaration=*/false);
16209 /* If there was no class-name, then this is not a constructor. */
16210 constructor_p = !cp_parser_error_occurred (parser);
16213 /* If we're still considering a constructor, we have to see a `(',
16214 to begin the parameter-declaration-clause, followed by either a
16215 `)', an `...', or a decl-specifier. We need to check for a
16216 type-specifier to avoid being fooled into thinking that:
16220 is a constructor. (It is actually a function named `f' that
16221 takes one parameter (of type `int') and returns a value of type
16224 && cp_parser_require (parser, CPP_OPEN_PAREN, "`('"))
16226 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN)
16227 && cp_lexer_next_token_is_not (parser->lexer, CPP_ELLIPSIS)
16228 /* A parameter declaration begins with a decl-specifier,
16229 which is either the "attribute" keyword, a storage class
16230 specifier, or (usually) a type-specifier. */
16231 && !cp_lexer_next_token_is_decl_specifier_keyword (parser->lexer))
16234 tree pushed_scope = NULL_TREE;
16235 unsigned saved_num_template_parameter_lists;
16237 /* Names appearing in the type-specifier should be looked up
16238 in the scope of the class. */
16239 if (current_class_type)
16243 type = TREE_TYPE (type_decl);
16244 if (TREE_CODE (type) == TYPENAME_TYPE)
16246 type = resolve_typename_type (type,
16247 /*only_current_p=*/false);
16248 if (type == error_mark_node)
16250 cp_parser_abort_tentative_parse (parser);
16254 pushed_scope = push_scope (type);
16257 /* Inside the constructor parameter list, surrounding
16258 template-parameter-lists do not apply. */
16259 saved_num_template_parameter_lists
16260 = parser->num_template_parameter_lists;
16261 parser->num_template_parameter_lists = 0;
16263 /* Look for the type-specifier. */
16264 cp_parser_type_specifier (parser,
16265 CP_PARSER_FLAGS_NONE,
16266 /*decl_specs=*/NULL,
16267 /*is_declarator=*/true,
16268 /*declares_class_or_enum=*/NULL,
16269 /*is_cv_qualifier=*/NULL);
16271 parser->num_template_parameter_lists
16272 = saved_num_template_parameter_lists;
16274 /* Leave the scope of the class. */
16276 pop_scope (pushed_scope);
16278 constructor_p = !cp_parser_error_occurred (parser);
16282 constructor_p = false;
16283 /* We did not really want to consume any tokens. */
16284 cp_parser_abort_tentative_parse (parser);
16286 return constructor_p;
16289 /* Parse the definition of the function given by the DECL_SPECIFIERS,
16290 ATTRIBUTES, and DECLARATOR. The access checks have been deferred;
16291 they must be performed once we are in the scope of the function.
16293 Returns the function defined. */
16296 cp_parser_function_definition_from_specifiers_and_declarator
16297 (cp_parser* parser,
16298 cp_decl_specifier_seq *decl_specifiers,
16300 const cp_declarator *declarator)
16305 /* Begin the function-definition. */
16306 success_p = start_function (decl_specifiers, declarator, attributes);
16308 /* The things we're about to see are not directly qualified by any
16309 template headers we've seen thus far. */
16310 reset_specialization ();
16312 /* If there were names looked up in the decl-specifier-seq that we
16313 did not check, check them now. We must wait until we are in the
16314 scope of the function to perform the checks, since the function
16315 might be a friend. */
16316 perform_deferred_access_checks ();
16320 /* Skip the entire function. */
16321 cp_parser_skip_to_end_of_block_or_statement (parser);
16322 fn = error_mark_node;
16324 else if (DECL_INITIAL (current_function_decl) != error_mark_node)
16326 /* Seen already, skip it. An error message has already been output. */
16327 cp_parser_skip_to_end_of_block_or_statement (parser);
16328 fn = current_function_decl;
16329 current_function_decl = NULL_TREE;
16330 /* If this is a function from a class, pop the nested class. */
16331 if (current_class_name)
16332 pop_nested_class ();
16335 fn = cp_parser_function_definition_after_declarator (parser,
16336 /*inline_p=*/false);
16341 /* Parse the part of a function-definition that follows the
16342 declarator. INLINE_P is TRUE iff this function is an inline
16343 function defined with a class-specifier.
16345 Returns the function defined. */
16348 cp_parser_function_definition_after_declarator (cp_parser* parser,
16352 bool ctor_initializer_p = false;
16353 bool saved_in_unbraced_linkage_specification_p;
16354 bool saved_in_function_body;
16355 unsigned saved_num_template_parameter_lists;
16357 saved_in_function_body = parser->in_function_body;
16358 parser->in_function_body = true;
16359 /* If the next token is `return', then the code may be trying to
16360 make use of the "named return value" extension that G++ used to
16362 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_RETURN))
16364 /* Consume the `return' keyword. */
16365 cp_lexer_consume_token (parser->lexer);
16366 /* Look for the identifier that indicates what value is to be
16368 cp_parser_identifier (parser);
16369 /* Issue an error message. */
16370 error ("named return values are no longer supported");
16371 /* Skip tokens until we reach the start of the function body. */
16374 cp_token *token = cp_lexer_peek_token (parser->lexer);
16375 if (token->type == CPP_OPEN_BRACE
16376 || token->type == CPP_EOF
16377 || token->type == CPP_PRAGMA_EOL)
16379 cp_lexer_consume_token (parser->lexer);
16382 /* The `extern' in `extern "C" void f () { ... }' does not apply to
16383 anything declared inside `f'. */
16384 saved_in_unbraced_linkage_specification_p
16385 = parser->in_unbraced_linkage_specification_p;
16386 parser->in_unbraced_linkage_specification_p = false;
16387 /* Inside the function, surrounding template-parameter-lists do not
16389 saved_num_template_parameter_lists
16390 = parser->num_template_parameter_lists;
16391 parser->num_template_parameter_lists = 0;
16392 /* If the next token is `try', then we are looking at a
16393 function-try-block. */
16394 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TRY))
16395 ctor_initializer_p = cp_parser_function_try_block (parser);
16396 /* A function-try-block includes the function-body, so we only do
16397 this next part if we're not processing a function-try-block. */
16400 = cp_parser_ctor_initializer_opt_and_function_body (parser);
16402 /* Finish the function. */
16403 fn = finish_function ((ctor_initializer_p ? 1 : 0) |
16404 (inline_p ? 2 : 0));
16405 /* Generate code for it, if necessary. */
16406 expand_or_defer_fn (fn);
16407 /* Restore the saved values. */
16408 parser->in_unbraced_linkage_specification_p
16409 = saved_in_unbraced_linkage_specification_p;
16410 parser->num_template_parameter_lists
16411 = saved_num_template_parameter_lists;
16412 parser->in_function_body = saved_in_function_body;
16417 /* Parse a template-declaration, assuming that the `export' (and
16418 `extern') keywords, if present, has already been scanned. MEMBER_P
16419 is as for cp_parser_template_declaration. */
16422 cp_parser_template_declaration_after_export (cp_parser* parser, bool member_p)
16424 tree decl = NULL_TREE;
16425 VEC (deferred_access_check,gc) *checks;
16426 tree parameter_list;
16427 bool friend_p = false;
16428 bool need_lang_pop;
16430 /* Look for the `template' keyword. */
16431 if (!cp_parser_require_keyword (parser, RID_TEMPLATE, "`template'"))
16435 if (!cp_parser_require (parser, CPP_LESS, "`<'"))
16437 if (at_class_scope_p () && current_function_decl)
16439 /* 14.5.2.2 [temp.mem]
16441 A local class shall not have member templates. */
16442 error ("invalid declaration of member template in local class");
16443 cp_parser_skip_to_end_of_block_or_statement (parser);
16448 A template ... shall not have C linkage. */
16449 if (current_lang_name == lang_name_c)
16451 error ("template with C linkage");
16452 /* Give it C++ linkage to avoid confusing other parts of the
16454 push_lang_context (lang_name_cplusplus);
16455 need_lang_pop = true;
16458 need_lang_pop = false;
16460 /* We cannot perform access checks on the template parameter
16461 declarations until we know what is being declared, just as we
16462 cannot check the decl-specifier list. */
16463 push_deferring_access_checks (dk_deferred);
16465 /* If the next token is `>', then we have an invalid
16466 specialization. Rather than complain about an invalid template
16467 parameter, issue an error message here. */
16468 if (cp_lexer_next_token_is (parser->lexer, CPP_GREATER))
16470 cp_parser_error (parser, "invalid explicit specialization");
16471 begin_specialization ();
16472 parameter_list = NULL_TREE;
16475 /* Parse the template parameters. */
16476 parameter_list = cp_parser_template_parameter_list (parser);
16478 /* Get the deferred access checks from the parameter list. These
16479 will be checked once we know what is being declared, as for a
16480 member template the checks must be performed in the scope of the
16481 class containing the member. */
16482 checks = get_deferred_access_checks ();
16484 /* Look for the `>'. */
16485 cp_parser_skip_to_end_of_template_parameter_list (parser);
16486 /* We just processed one more parameter list. */
16487 ++parser->num_template_parameter_lists;
16488 /* If the next token is `template', there are more template
16490 if (cp_lexer_next_token_is_keyword (parser->lexer,
16492 cp_parser_template_declaration_after_export (parser, member_p);
16495 /* There are no access checks when parsing a template, as we do not
16496 know if a specialization will be a friend. */
16497 push_deferring_access_checks (dk_no_check);
16498 decl = cp_parser_single_declaration (parser,
16502 pop_deferring_access_checks ();
16504 /* If this is a member template declaration, let the front
16506 if (member_p && !friend_p && decl)
16508 if (TREE_CODE (decl) == TYPE_DECL)
16509 cp_parser_check_access_in_redeclaration (decl);
16511 decl = finish_member_template_decl (decl);
16513 else if (friend_p && decl && TREE_CODE (decl) == TYPE_DECL)
16514 make_friend_class (current_class_type, TREE_TYPE (decl),
16515 /*complain=*/true);
16517 /* We are done with the current parameter list. */
16518 --parser->num_template_parameter_lists;
16520 pop_deferring_access_checks ();
16523 finish_template_decl (parameter_list);
16525 /* Register member declarations. */
16526 if (member_p && !friend_p && decl && !DECL_CLASS_TEMPLATE_P (decl))
16527 finish_member_declaration (decl);
16528 /* For the erroneous case of a template with C linkage, we pushed an
16529 implicit C++ linkage scope; exit that scope now. */
16531 pop_lang_context ();
16532 /* If DECL is a function template, we must return to parse it later.
16533 (Even though there is no definition, there might be default
16534 arguments that need handling.) */
16535 if (member_p && decl
16536 && (TREE_CODE (decl) == FUNCTION_DECL
16537 || DECL_FUNCTION_TEMPLATE_P (decl)))
16538 TREE_VALUE (parser->unparsed_functions_queues)
16539 = tree_cons (NULL_TREE, decl,
16540 TREE_VALUE (parser->unparsed_functions_queues));
16543 /* Perform the deferred access checks from a template-parameter-list.
16544 CHECKS is a TREE_LIST of access checks, as returned by
16545 get_deferred_access_checks. */
16548 cp_parser_perform_template_parameter_access_checks (VEC (deferred_access_check,gc)* checks)
16550 ++processing_template_parmlist;
16551 perform_access_checks (checks);
16552 --processing_template_parmlist;
16555 /* Parse a `decl-specifier-seq [opt] init-declarator [opt] ;' or
16556 `function-definition' sequence. MEMBER_P is true, this declaration
16557 appears in a class scope.
16559 Returns the DECL for the declared entity. If FRIEND_P is non-NULL,
16560 *FRIEND_P is set to TRUE iff the declaration is a friend. */
16563 cp_parser_single_declaration (cp_parser* parser,
16564 VEC (deferred_access_check,gc)* checks,
16568 int declares_class_or_enum;
16569 tree decl = NULL_TREE;
16570 cp_decl_specifier_seq decl_specifiers;
16571 bool function_definition_p = false;
16573 /* This function is only used when processing a template
16575 gcc_assert (innermost_scope_kind () == sk_template_parms
16576 || innermost_scope_kind () == sk_template_spec);
16578 /* Defer access checks until we know what is being declared. */
16579 push_deferring_access_checks (dk_deferred);
16581 /* Try the `decl-specifier-seq [opt] init-declarator [opt]'
16583 cp_parser_decl_specifier_seq (parser,
16584 CP_PARSER_FLAGS_OPTIONAL,
16586 &declares_class_or_enum);
16588 *friend_p = cp_parser_friend_p (&decl_specifiers);
16590 /* There are no template typedefs. */
16591 if (decl_specifiers.specs[(int) ds_typedef])
16593 error ("template declaration of %qs", "typedef");
16594 decl = error_mark_node;
16597 /* Gather up the access checks that occurred the
16598 decl-specifier-seq. */
16599 stop_deferring_access_checks ();
16601 /* Check for the declaration of a template class. */
16602 if (declares_class_or_enum)
16604 if (cp_parser_declares_only_class_p (parser))
16606 decl = shadow_tag (&decl_specifiers);
16611 friend template <typename T> struct A<T>::B;
16614 A<T>::B will be represented by a TYPENAME_TYPE, and
16615 therefore not recognized by shadow_tag. */
16616 if (friend_p && *friend_p
16618 && decl_specifiers.type
16619 && TYPE_P (decl_specifiers.type))
16620 decl = decl_specifiers.type;
16622 if (decl && decl != error_mark_node)
16623 decl = TYPE_NAME (decl);
16625 decl = error_mark_node;
16627 /* Perform access checks for template parameters. */
16628 cp_parser_perform_template_parameter_access_checks (checks);
16631 /* If it's not a template class, try for a template function. If
16632 the next token is a `;', then this declaration does not declare
16633 anything. But, if there were errors in the decl-specifiers, then
16634 the error might well have come from an attempted class-specifier.
16635 In that case, there's no need to warn about a missing declarator. */
16637 && (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON)
16638 || decl_specifiers.type != error_mark_node))
16639 decl = cp_parser_init_declarator (parser,
16642 /*function_definition_allowed_p=*/true,
16644 declares_class_or_enum,
16645 &function_definition_p);
16647 pop_deferring_access_checks ();
16649 /* Clear any current qualification; whatever comes next is the start
16650 of something new. */
16651 parser->scope = NULL_TREE;
16652 parser->qualifying_scope = NULL_TREE;
16653 parser->object_scope = NULL_TREE;
16654 /* Look for a trailing `;' after the declaration. */
16655 if (!function_definition_p
16656 && (decl == error_mark_node
16657 || !cp_parser_require (parser, CPP_SEMICOLON, "`;'")))
16658 cp_parser_skip_to_end_of_block_or_statement (parser);
16663 /* Parse a cast-expression that is not the operand of a unary "&". */
16666 cp_parser_simple_cast_expression (cp_parser *parser)
16668 return cp_parser_cast_expression (parser, /*address_p=*/false,
16672 /* Parse a functional cast to TYPE. Returns an expression
16673 representing the cast. */
16676 cp_parser_functional_cast (cp_parser* parser, tree type)
16678 tree expression_list;
16682 = cp_parser_parenthesized_expression_list (parser, false,
16684 /*allow_expansion_p=*/true,
16685 /*non_constant_p=*/NULL);
16687 cast = build_functional_cast (type, expression_list);
16688 /* [expr.const]/1: In an integral constant expression "only type
16689 conversions to integral or enumeration type can be used". */
16690 if (TREE_CODE (type) == TYPE_DECL)
16691 type = TREE_TYPE (type);
16692 if (cast != error_mark_node
16693 && !cast_valid_in_integral_constant_expression_p (type)
16694 && (cp_parser_non_integral_constant_expression
16695 (parser, "a call to a constructor")))
16696 return error_mark_node;
16700 /* Save the tokens that make up the body of a member function defined
16701 in a class-specifier. The DECL_SPECIFIERS and DECLARATOR have
16702 already been parsed. The ATTRIBUTES are any GNU "__attribute__"
16703 specifiers applied to the declaration. Returns the FUNCTION_DECL
16704 for the member function. */
16707 cp_parser_save_member_function_body (cp_parser* parser,
16708 cp_decl_specifier_seq *decl_specifiers,
16709 cp_declarator *declarator,
16716 /* Create the function-declaration. */
16717 fn = start_method (decl_specifiers, declarator, attributes);
16718 /* If something went badly wrong, bail out now. */
16719 if (fn == error_mark_node)
16721 /* If there's a function-body, skip it. */
16722 if (cp_parser_token_starts_function_definition_p
16723 (cp_lexer_peek_token (parser->lexer)))
16724 cp_parser_skip_to_end_of_block_or_statement (parser);
16725 return error_mark_node;
16728 /* Remember it, if there default args to post process. */
16729 cp_parser_save_default_args (parser, fn);
16731 /* Save away the tokens that make up the body of the
16733 first = parser->lexer->next_token;
16734 cp_parser_cache_group (parser, CPP_CLOSE_BRACE, /*depth=*/0);
16735 /* Handle function try blocks. */
16736 while (cp_lexer_next_token_is_keyword (parser->lexer, RID_CATCH))
16737 cp_parser_cache_group (parser, CPP_CLOSE_BRACE, /*depth=*/0);
16738 last = parser->lexer->next_token;
16740 /* Save away the inline definition; we will process it when the
16741 class is complete. */
16742 DECL_PENDING_INLINE_INFO (fn) = cp_token_cache_new (first, last);
16743 DECL_PENDING_INLINE_P (fn) = 1;
16745 /* We need to know that this was defined in the class, so that
16746 friend templates are handled correctly. */
16747 DECL_INITIALIZED_IN_CLASS_P (fn) = 1;
16749 /* We're done with the inline definition. */
16750 finish_method (fn);
16752 /* Add FN to the queue of functions to be parsed later. */
16753 TREE_VALUE (parser->unparsed_functions_queues)
16754 = tree_cons (NULL_TREE, fn,
16755 TREE_VALUE (parser->unparsed_functions_queues));
16760 /* Parse a template-argument-list, as well as the trailing ">" (but
16761 not the opening ">"). See cp_parser_template_argument_list for the
16765 cp_parser_enclosed_template_argument_list (cp_parser* parser)
16769 tree saved_qualifying_scope;
16770 tree saved_object_scope;
16771 bool saved_greater_than_is_operator_p;
16772 bool saved_skip_evaluation;
16776 When parsing a template-id, the first non-nested `>' is taken as
16777 the end of the template-argument-list rather than a greater-than
16779 saved_greater_than_is_operator_p
16780 = parser->greater_than_is_operator_p;
16781 parser->greater_than_is_operator_p = false;
16782 /* Parsing the argument list may modify SCOPE, so we save it
16784 saved_scope = parser->scope;
16785 saved_qualifying_scope = parser->qualifying_scope;
16786 saved_object_scope = parser->object_scope;
16787 /* We need to evaluate the template arguments, even though this
16788 template-id may be nested within a "sizeof". */
16789 saved_skip_evaluation = skip_evaluation;
16790 skip_evaluation = false;
16791 /* Parse the template-argument-list itself. */
16792 if (cp_lexer_next_token_is (parser->lexer, CPP_GREATER)
16793 || cp_lexer_next_token_is (parser->lexer, CPP_RSHIFT))
16794 arguments = NULL_TREE;
16796 arguments = cp_parser_template_argument_list (parser);
16797 /* Look for the `>' that ends the template-argument-list. If we find
16798 a '>>' instead, it's probably just a typo. */
16799 if (cp_lexer_next_token_is (parser->lexer, CPP_RSHIFT))
16803 /* In C++0x, a `>>' in a template argument list or cast
16804 expression is considered to be two separate `>'
16805 tokens. So, change the current token to a `>', but don't
16806 consume it: it will be consumed later when the outer
16807 template argument list (or cast expression) is parsed.
16808 Note that this replacement of `>' for `>>' is necessary
16809 even if we are parsing tentatively: in the tentative
16810 case, after calling
16811 cp_parser_enclosed_template_argument_list we will always
16812 throw away all of the template arguments and the first
16813 closing `>', either because the template argument list
16814 was erroneous or because we are replacing those tokens
16815 with a CPP_TEMPLATE_ID token. The second `>' (which will
16816 not have been thrown away) is needed either to close an
16817 outer template argument list or to complete a new-style
16819 cp_token *token = cp_lexer_peek_token (parser->lexer);
16820 token->type = CPP_GREATER;
16822 else if (!saved_greater_than_is_operator_p)
16824 /* If we're in a nested template argument list, the '>>' has
16825 to be a typo for '> >'. We emit the error message, but we
16826 continue parsing and we push a '>' as next token, so that
16827 the argument list will be parsed correctly. Note that the
16828 global source location is still on the token before the
16829 '>>', so we need to say explicitly where we want it. */
16830 cp_token *token = cp_lexer_peek_token (parser->lexer);
16831 error ("%H%<>>%> should be %<> >%> "
16832 "within a nested template argument list",
16835 token->type = CPP_GREATER;
16839 /* If this is not a nested template argument list, the '>>'
16840 is a typo for '>'. Emit an error message and continue.
16841 Same deal about the token location, but here we can get it
16842 right by consuming the '>>' before issuing the diagnostic. */
16843 cp_lexer_consume_token (parser->lexer);
16844 error ("spurious %<>>%>, use %<>%> to terminate "
16845 "a template argument list");
16849 cp_parser_skip_to_end_of_template_parameter_list (parser);
16850 /* The `>' token might be a greater-than operator again now. */
16851 parser->greater_than_is_operator_p
16852 = saved_greater_than_is_operator_p;
16853 /* Restore the SAVED_SCOPE. */
16854 parser->scope = saved_scope;
16855 parser->qualifying_scope = saved_qualifying_scope;
16856 parser->object_scope = saved_object_scope;
16857 skip_evaluation = saved_skip_evaluation;
16862 /* MEMBER_FUNCTION is a member function, or a friend. If default
16863 arguments, or the body of the function have not yet been parsed,
16867 cp_parser_late_parsing_for_member (cp_parser* parser, tree member_function)
16869 /* If this member is a template, get the underlying
16871 if (DECL_FUNCTION_TEMPLATE_P (member_function))
16872 member_function = DECL_TEMPLATE_RESULT (member_function);
16874 /* There should not be any class definitions in progress at this
16875 point; the bodies of members are only parsed outside of all class
16877 gcc_assert (parser->num_classes_being_defined == 0);
16878 /* While we're parsing the member functions we might encounter more
16879 classes. We want to handle them right away, but we don't want
16880 them getting mixed up with functions that are currently in the
16882 parser->unparsed_functions_queues
16883 = tree_cons (NULL_TREE, NULL_TREE, parser->unparsed_functions_queues);
16885 /* Make sure that any template parameters are in scope. */
16886 maybe_begin_member_template_processing (member_function);
16888 /* If the body of the function has not yet been parsed, parse it
16890 if (DECL_PENDING_INLINE_P (member_function))
16892 tree function_scope;
16893 cp_token_cache *tokens;
16895 /* The function is no longer pending; we are processing it. */
16896 tokens = DECL_PENDING_INLINE_INFO (member_function);
16897 DECL_PENDING_INLINE_INFO (member_function) = NULL;
16898 DECL_PENDING_INLINE_P (member_function) = 0;
16900 /* If this is a local class, enter the scope of the containing
16902 function_scope = current_function_decl;
16903 if (function_scope)
16904 push_function_context_to (function_scope);
16907 /* Push the body of the function onto the lexer stack. */
16908 cp_parser_push_lexer_for_tokens (parser, tokens);
16910 /* Let the front end know that we going to be defining this
16912 start_preparsed_function (member_function, NULL_TREE,
16913 SF_PRE_PARSED | SF_INCLASS_INLINE);
16915 /* Don't do access checking if it is a templated function. */
16916 if (processing_template_decl)
16917 push_deferring_access_checks (dk_no_check);
16919 /* Now, parse the body of the function. */
16920 cp_parser_function_definition_after_declarator (parser,
16921 /*inline_p=*/true);
16923 if (processing_template_decl)
16924 pop_deferring_access_checks ();
16926 /* Leave the scope of the containing function. */
16927 if (function_scope)
16928 pop_function_context_from (function_scope);
16929 cp_parser_pop_lexer (parser);
16932 /* Remove any template parameters from the symbol table. */
16933 maybe_end_member_template_processing ();
16935 /* Restore the queue. */
16936 parser->unparsed_functions_queues
16937 = TREE_CHAIN (parser->unparsed_functions_queues);
16940 /* If DECL contains any default args, remember it on the unparsed
16941 functions queue. */
16944 cp_parser_save_default_args (cp_parser* parser, tree decl)
16948 for (probe = TYPE_ARG_TYPES (TREE_TYPE (decl));
16950 probe = TREE_CHAIN (probe))
16951 if (TREE_PURPOSE (probe))
16953 TREE_PURPOSE (parser->unparsed_functions_queues)
16954 = tree_cons (current_class_type, decl,
16955 TREE_PURPOSE (parser->unparsed_functions_queues));
16960 /* FN is a FUNCTION_DECL which may contains a parameter with an
16961 unparsed DEFAULT_ARG. Parse the default args now. This function
16962 assumes that the current scope is the scope in which the default
16963 argument should be processed. */
16966 cp_parser_late_parsing_default_args (cp_parser *parser, tree fn)
16968 bool saved_local_variables_forbidden_p;
16971 /* While we're parsing the default args, we might (due to the
16972 statement expression extension) encounter more classes. We want
16973 to handle them right away, but we don't want them getting mixed
16974 up with default args that are currently in the queue. */
16975 parser->unparsed_functions_queues
16976 = tree_cons (NULL_TREE, NULL_TREE, parser->unparsed_functions_queues);
16978 /* Local variable names (and the `this' keyword) may not appear
16979 in a default argument. */
16980 saved_local_variables_forbidden_p = parser->local_variables_forbidden_p;
16981 parser->local_variables_forbidden_p = true;
16983 for (parm = TYPE_ARG_TYPES (TREE_TYPE (fn));
16985 parm = TREE_CHAIN (parm))
16987 cp_token_cache *tokens;
16988 tree default_arg = TREE_PURPOSE (parm);
16990 VEC(tree,gc) *insts;
16997 if (TREE_CODE (default_arg) != DEFAULT_ARG)
16998 /* This can happen for a friend declaration for a function
16999 already declared with default arguments. */
17002 /* Push the saved tokens for the default argument onto the parser's
17004 tokens = DEFARG_TOKENS (default_arg);
17005 cp_parser_push_lexer_for_tokens (parser, tokens);
17007 /* Parse the assignment-expression. */
17008 parsed_arg = cp_parser_assignment_expression (parser, /*cast_p=*/false);
17010 if (!processing_template_decl)
17011 parsed_arg = check_default_argument (TREE_VALUE (parm), parsed_arg);
17013 TREE_PURPOSE (parm) = parsed_arg;
17015 /* Update any instantiations we've already created. */
17016 for (insts = DEFARG_INSTANTIATIONS (default_arg), ix = 0;
17017 VEC_iterate (tree, insts, ix, copy); ix++)
17018 TREE_PURPOSE (copy) = parsed_arg;
17020 /* If the token stream has not been completely used up, then
17021 there was extra junk after the end of the default
17023 if (!cp_lexer_next_token_is (parser->lexer, CPP_EOF))
17024 cp_parser_error (parser, "expected %<,%>");
17026 /* Revert to the main lexer. */
17027 cp_parser_pop_lexer (parser);
17030 /* Make sure no default arg is missing. */
17031 check_default_args (fn);
17033 /* Restore the state of local_variables_forbidden_p. */
17034 parser->local_variables_forbidden_p = saved_local_variables_forbidden_p;
17036 /* Restore the queue. */
17037 parser->unparsed_functions_queues
17038 = TREE_CHAIN (parser->unparsed_functions_queues);
17041 /* Parse the operand of `sizeof' (or a similar operator). Returns
17042 either a TYPE or an expression, depending on the form of the
17043 input. The KEYWORD indicates which kind of expression we have
17047 cp_parser_sizeof_operand (cp_parser* parser, enum rid keyword)
17049 static const char *format;
17050 tree expr = NULL_TREE;
17051 const char *saved_message;
17052 bool saved_integral_constant_expression_p;
17053 bool saved_non_integral_constant_expression_p;
17054 bool pack_expansion_p = false;
17056 /* Initialize FORMAT the first time we get here. */
17058 format = "types may not be defined in '%s' expressions";
17060 /* Types cannot be defined in a `sizeof' expression. Save away the
17062 saved_message = parser->type_definition_forbidden_message;
17063 /* And create the new one. */
17064 parser->type_definition_forbidden_message
17065 = XNEWVEC (const char, strlen (format)
17066 + strlen (IDENTIFIER_POINTER (ridpointers[keyword]))
17068 sprintf ((char *) parser->type_definition_forbidden_message,
17069 format, IDENTIFIER_POINTER (ridpointers[keyword]));
17071 /* The restrictions on constant-expressions do not apply inside
17072 sizeof expressions. */
17073 saved_integral_constant_expression_p
17074 = parser->integral_constant_expression_p;
17075 saved_non_integral_constant_expression_p
17076 = parser->non_integral_constant_expression_p;
17077 parser->integral_constant_expression_p = false;
17079 /* If it's a `...', then we are computing the length of a parameter
17081 if (keyword == RID_SIZEOF
17082 && cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS))
17084 /* Consume the `...'. */
17085 cp_lexer_consume_token (parser->lexer);
17086 maybe_warn_variadic_templates ();
17088 /* Note that this is an expansion. */
17089 pack_expansion_p = true;
17092 /* Do not actually evaluate the expression. */
17094 /* If it's a `(', then we might be looking at the type-id
17096 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
17099 bool saved_in_type_id_in_expr_p;
17101 /* We can't be sure yet whether we're looking at a type-id or an
17103 cp_parser_parse_tentatively (parser);
17104 /* Consume the `('. */
17105 cp_lexer_consume_token (parser->lexer);
17106 /* Parse the type-id. */
17107 saved_in_type_id_in_expr_p = parser->in_type_id_in_expr_p;
17108 parser->in_type_id_in_expr_p = true;
17109 type = cp_parser_type_id (parser);
17110 parser->in_type_id_in_expr_p = saved_in_type_id_in_expr_p;
17111 /* Now, look for the trailing `)'. */
17112 cp_parser_require (parser, CPP_CLOSE_PAREN, "%<)%>");
17113 /* If all went well, then we're done. */
17114 if (cp_parser_parse_definitely (parser))
17116 cp_decl_specifier_seq decl_specs;
17118 /* Build a trivial decl-specifier-seq. */
17119 clear_decl_specs (&decl_specs);
17120 decl_specs.type = type;
17122 /* Call grokdeclarator to figure out what type this is. */
17123 expr = grokdeclarator (NULL,
17127 /*attrlist=*/NULL);
17131 /* If the type-id production did not work out, then we must be
17132 looking at the unary-expression production. */
17134 expr = cp_parser_unary_expression (parser, /*address_p=*/false,
17137 if (pack_expansion_p)
17138 /* Build a pack expansion. */
17139 expr = make_pack_expansion (expr);
17141 /* Go back to evaluating expressions. */
17144 /* Free the message we created. */
17145 free ((char *) parser->type_definition_forbidden_message);
17146 /* And restore the old one. */
17147 parser->type_definition_forbidden_message = saved_message;
17148 parser->integral_constant_expression_p
17149 = saved_integral_constant_expression_p;
17150 parser->non_integral_constant_expression_p
17151 = saved_non_integral_constant_expression_p;
17156 /* If the current declaration has no declarator, return true. */
17159 cp_parser_declares_only_class_p (cp_parser *parser)
17161 /* If the next token is a `;' or a `,' then there is no
17163 return (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)
17164 || cp_lexer_next_token_is (parser->lexer, CPP_COMMA));
17167 /* Update the DECL_SPECS to reflect the storage class indicated by
17171 cp_parser_set_storage_class (cp_parser *parser,
17172 cp_decl_specifier_seq *decl_specs,
17175 cp_storage_class storage_class;
17177 if (parser->in_unbraced_linkage_specification_p)
17179 error ("invalid use of %qD in linkage specification",
17180 ridpointers[keyword]);
17183 else if (decl_specs->storage_class != sc_none)
17185 decl_specs->conflicting_specifiers_p = true;
17189 if ((keyword == RID_EXTERN || keyword == RID_STATIC)
17190 && decl_specs->specs[(int) ds_thread])
17192 error ("%<__thread%> before %qD", ridpointers[keyword]);
17193 decl_specs->specs[(int) ds_thread] = 0;
17199 storage_class = sc_auto;
17202 storage_class = sc_register;
17205 storage_class = sc_static;
17208 storage_class = sc_extern;
17211 storage_class = sc_mutable;
17214 gcc_unreachable ();
17216 decl_specs->storage_class = storage_class;
17218 /* A storage class specifier cannot be applied alongside a typedef
17219 specifier. If there is a typedef specifier present then set
17220 conflicting_specifiers_p which will trigger an error later
17221 on in grokdeclarator. */
17222 if (decl_specs->specs[(int)ds_typedef])
17223 decl_specs->conflicting_specifiers_p = true;
17226 /* Update the DECL_SPECS to reflect the TYPE_SPEC. If USER_DEFINED_P
17227 is true, the type is a user-defined type; otherwise it is a
17228 built-in type specified by a keyword. */
17231 cp_parser_set_decl_spec_type (cp_decl_specifier_seq *decl_specs,
17233 bool user_defined_p)
17235 decl_specs->any_specifiers_p = true;
17237 /* If the user tries to redeclare bool or wchar_t (with, for
17238 example, in "typedef int wchar_t;") we remember that this is what
17239 happened. In system headers, we ignore these declarations so
17240 that G++ can work with system headers that are not C++-safe. */
17241 if (decl_specs->specs[(int) ds_typedef]
17243 && (type_spec == boolean_type_node
17244 || type_spec == wchar_type_node)
17245 && (decl_specs->type
17246 || decl_specs->specs[(int) ds_long]
17247 || decl_specs->specs[(int) ds_short]
17248 || decl_specs->specs[(int) ds_unsigned]
17249 || decl_specs->specs[(int) ds_signed]))
17251 decl_specs->redefined_builtin_type = type_spec;
17252 if (!decl_specs->type)
17254 decl_specs->type = type_spec;
17255 decl_specs->user_defined_type_p = false;
17258 else if (decl_specs->type)
17259 decl_specs->multiple_types_p = true;
17262 decl_specs->type = type_spec;
17263 decl_specs->user_defined_type_p = user_defined_p;
17264 decl_specs->redefined_builtin_type = NULL_TREE;
17268 /* DECL_SPECIFIERS is the representation of a decl-specifier-seq.
17269 Returns TRUE iff `friend' appears among the DECL_SPECIFIERS. */
17272 cp_parser_friend_p (const cp_decl_specifier_seq *decl_specifiers)
17274 return decl_specifiers->specs[(int) ds_friend] != 0;
17277 /* If the next token is of the indicated TYPE, consume it. Otherwise,
17278 issue an error message indicating that TOKEN_DESC was expected.
17280 Returns the token consumed, if the token had the appropriate type.
17281 Otherwise, returns NULL. */
17284 cp_parser_require (cp_parser* parser,
17285 enum cpp_ttype type,
17286 const char* token_desc)
17288 if (cp_lexer_next_token_is (parser->lexer, type))
17289 return cp_lexer_consume_token (parser->lexer);
17292 /* Output the MESSAGE -- unless we're parsing tentatively. */
17293 if (!cp_parser_simulate_error (parser))
17295 char *message = concat ("expected ", token_desc, NULL);
17296 cp_parser_error (parser, message);
17303 /* An error message is produced if the next token is not '>'.
17304 All further tokens are skipped until the desired token is
17305 found or '{', '}', ';' or an unbalanced ')' or ']'. */
17308 cp_parser_skip_to_end_of_template_parameter_list (cp_parser* parser)
17310 /* Current level of '< ... >'. */
17311 unsigned level = 0;
17312 /* Ignore '<' and '>' nested inside '( ... )' or '[ ... ]'. */
17313 unsigned nesting_depth = 0;
17315 /* Are we ready, yet? If not, issue error message. */
17316 if (cp_parser_require (parser, CPP_GREATER, "%<>%>"))
17319 /* Skip tokens until the desired token is found. */
17322 /* Peek at the next token. */
17323 switch (cp_lexer_peek_token (parser->lexer)->type)
17326 if (!nesting_depth)
17332 /* C++0x views the `>>' operator as two `>' tokens, but
17335 else if (!nesting_depth && level-- == 0)
17337 /* We've hit a `>>' where the first `>' closes the
17338 template argument list, and the second `>' is
17339 spurious. Just consume the `>>' and stop; we've
17340 already produced at least one error. */
17341 cp_lexer_consume_token (parser->lexer);
17344 /* Fall through for C++0x, so we handle the second `>' in
17348 if (!nesting_depth && level-- == 0)
17350 /* We've reached the token we want, consume it and stop. */
17351 cp_lexer_consume_token (parser->lexer);
17356 case CPP_OPEN_PAREN:
17357 case CPP_OPEN_SQUARE:
17361 case CPP_CLOSE_PAREN:
17362 case CPP_CLOSE_SQUARE:
17363 if (nesting_depth-- == 0)
17368 case CPP_PRAGMA_EOL:
17369 case CPP_SEMICOLON:
17370 case CPP_OPEN_BRACE:
17371 case CPP_CLOSE_BRACE:
17372 /* The '>' was probably forgotten, don't look further. */
17379 /* Consume this token. */
17380 cp_lexer_consume_token (parser->lexer);
17384 /* If the next token is the indicated keyword, consume it. Otherwise,
17385 issue an error message indicating that TOKEN_DESC was expected.
17387 Returns the token consumed, if the token had the appropriate type.
17388 Otherwise, returns NULL. */
17391 cp_parser_require_keyword (cp_parser* parser,
17393 const char* token_desc)
17395 cp_token *token = cp_parser_require (parser, CPP_KEYWORD, token_desc);
17397 if (token && token->keyword != keyword)
17399 dyn_string_t error_msg;
17401 /* Format the error message. */
17402 error_msg = dyn_string_new (0);
17403 dyn_string_append_cstr (error_msg, "expected ");
17404 dyn_string_append_cstr (error_msg, token_desc);
17405 cp_parser_error (parser, error_msg->s);
17406 dyn_string_delete (error_msg);
17413 /* Returns TRUE iff TOKEN is a token that can begin the body of a
17414 function-definition. */
17417 cp_parser_token_starts_function_definition_p (cp_token* token)
17419 return (/* An ordinary function-body begins with an `{'. */
17420 token->type == CPP_OPEN_BRACE
17421 /* A ctor-initializer begins with a `:'. */
17422 || token->type == CPP_COLON
17423 /* A function-try-block begins with `try'. */
17424 || token->keyword == RID_TRY
17425 /* The named return value extension begins with `return'. */
17426 || token->keyword == RID_RETURN);
17429 /* Returns TRUE iff the next token is the ":" or "{" beginning a class
17433 cp_parser_next_token_starts_class_definition_p (cp_parser *parser)
17437 token = cp_lexer_peek_token (parser->lexer);
17438 return (token->type == CPP_OPEN_BRACE || token->type == CPP_COLON);
17441 /* Returns TRUE iff the next token is the "," or ">" (or `>>', in
17442 C++0x) ending a template-argument. */
17445 cp_parser_next_token_ends_template_argument_p (cp_parser *parser)
17449 token = cp_lexer_peek_token (parser->lexer);
17450 return (token->type == CPP_COMMA
17451 || token->type == CPP_GREATER
17452 || token->type == CPP_ELLIPSIS
17453 || (flag_cpp0x && token->type == CPP_RSHIFT));
17456 /* Returns TRUE iff the n-th token is a "<", or the n-th is a "[" and the
17457 (n+1)-th is a ":" (which is a possible digraph typo for "< ::"). */
17460 cp_parser_nth_token_starts_template_argument_list_p (cp_parser * parser,
17465 token = cp_lexer_peek_nth_token (parser->lexer, n);
17466 if (token->type == CPP_LESS)
17468 /* Check for the sequence `<::' in the original code. It would be lexed as
17469 `[:', where `[' is a digraph, and there is no whitespace before
17471 if (token->type == CPP_OPEN_SQUARE && token->flags & DIGRAPH)
17474 token2 = cp_lexer_peek_nth_token (parser->lexer, n+1);
17475 if (token2->type == CPP_COLON && !(token2->flags & PREV_WHITE))
17481 /* Returns the kind of tag indicated by TOKEN, if it is a class-key,
17482 or none_type otherwise. */
17484 static enum tag_types
17485 cp_parser_token_is_class_key (cp_token* token)
17487 switch (token->keyword)
17492 return record_type;
17501 /* Issue an error message if the CLASS_KEY does not match the TYPE. */
17504 cp_parser_check_class_key (enum tag_types class_key, tree type)
17506 if ((TREE_CODE (type) == UNION_TYPE) != (class_key == union_type))
17507 pedwarn ("%qs tag used in naming %q#T",
17508 class_key == union_type ? "union"
17509 : class_key == record_type ? "struct" : "class",
17513 /* Issue an error message if DECL is redeclared with different
17514 access than its original declaration [class.access.spec/3].
17515 This applies to nested classes and nested class templates.
17519 cp_parser_check_access_in_redeclaration (tree decl)
17521 if (!CLASS_TYPE_P (TREE_TYPE (decl)))
17524 if ((TREE_PRIVATE (decl)
17525 != (current_access_specifier == access_private_node))
17526 || (TREE_PROTECTED (decl)
17527 != (current_access_specifier == access_protected_node)))
17528 error ("%qD redeclared with different access", decl);
17531 /* Look for the `template' keyword, as a syntactic disambiguator.
17532 Return TRUE iff it is present, in which case it will be
17536 cp_parser_optional_template_keyword (cp_parser *parser)
17538 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE))
17540 /* The `template' keyword can only be used within templates;
17541 outside templates the parser can always figure out what is a
17542 template and what is not. */
17543 if (!processing_template_decl)
17545 error ("%<template%> (as a disambiguator) is only allowed "
17546 "within templates");
17547 /* If this part of the token stream is rescanned, the same
17548 error message would be generated. So, we purge the token
17549 from the stream. */
17550 cp_lexer_purge_token (parser->lexer);
17555 /* Consume the `template' keyword. */
17556 cp_lexer_consume_token (parser->lexer);
17564 /* The next token is a CPP_NESTED_NAME_SPECIFIER. Consume the token,
17565 set PARSER->SCOPE, and perform other related actions. */
17568 cp_parser_pre_parsed_nested_name_specifier (cp_parser *parser)
17571 struct tree_check *check_value;
17572 deferred_access_check *chk;
17573 VEC (deferred_access_check,gc) *checks;
17575 /* Get the stored value. */
17576 check_value = cp_lexer_consume_token (parser->lexer)->u.tree_check_value;
17577 /* Perform any access checks that were deferred. */
17578 checks = check_value->checks;
17582 VEC_iterate (deferred_access_check, checks, i, chk) ;
17585 perform_or_defer_access_check (chk->binfo,
17590 /* Set the scope from the stored value. */
17591 parser->scope = check_value->value;
17592 parser->qualifying_scope = check_value->qualifying_scope;
17593 parser->object_scope = NULL_TREE;
17596 /* Consume tokens up through a non-nested END token. */
17599 cp_parser_cache_group (cp_parser *parser,
17600 enum cpp_ttype end,
17607 /* Abort a parenthesized expression if we encounter a brace. */
17608 if ((end == CPP_CLOSE_PAREN || depth == 0)
17609 && cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
17611 /* If we've reached the end of the file, stop. */
17612 if (cp_lexer_next_token_is (parser->lexer, CPP_EOF)
17613 || (end != CPP_PRAGMA_EOL
17614 && cp_lexer_next_token_is (parser->lexer, CPP_PRAGMA_EOL)))
17616 /* Consume the next token. */
17617 token = cp_lexer_consume_token (parser->lexer);
17618 /* See if it starts a new group. */
17619 if (token->type == CPP_OPEN_BRACE)
17621 cp_parser_cache_group (parser, CPP_CLOSE_BRACE, depth + 1);
17625 else if (token->type == CPP_OPEN_PAREN)
17626 cp_parser_cache_group (parser, CPP_CLOSE_PAREN, depth + 1);
17627 else if (token->type == CPP_PRAGMA)
17628 cp_parser_cache_group (parser, CPP_PRAGMA_EOL, depth + 1);
17629 else if (token->type == end)
17634 /* Begin parsing tentatively. We always save tokens while parsing
17635 tentatively so that if the tentative parsing fails we can restore the
17639 cp_parser_parse_tentatively (cp_parser* parser)
17641 /* Enter a new parsing context. */
17642 parser->context = cp_parser_context_new (parser->context);
17643 /* Begin saving tokens. */
17644 cp_lexer_save_tokens (parser->lexer);
17645 /* In order to avoid repetitive access control error messages,
17646 access checks are queued up until we are no longer parsing
17648 push_deferring_access_checks (dk_deferred);
17651 /* Commit to the currently active tentative parse. */
17654 cp_parser_commit_to_tentative_parse (cp_parser* parser)
17656 cp_parser_context *context;
17659 /* Mark all of the levels as committed. */
17660 lexer = parser->lexer;
17661 for (context = parser->context; context->next; context = context->next)
17663 if (context->status == CP_PARSER_STATUS_KIND_COMMITTED)
17665 context->status = CP_PARSER_STATUS_KIND_COMMITTED;
17666 while (!cp_lexer_saving_tokens (lexer))
17667 lexer = lexer->next;
17668 cp_lexer_commit_tokens (lexer);
17672 /* Abort the currently active tentative parse. All consumed tokens
17673 will be rolled back, and no diagnostics will be issued. */
17676 cp_parser_abort_tentative_parse (cp_parser* parser)
17678 cp_parser_simulate_error (parser);
17679 /* Now, pretend that we want to see if the construct was
17680 successfully parsed. */
17681 cp_parser_parse_definitely (parser);
17684 /* Stop parsing tentatively. If a parse error has occurred, restore the
17685 token stream. Otherwise, commit to the tokens we have consumed.
17686 Returns true if no error occurred; false otherwise. */
17689 cp_parser_parse_definitely (cp_parser* parser)
17691 bool error_occurred;
17692 cp_parser_context *context;
17694 /* Remember whether or not an error occurred, since we are about to
17695 destroy that information. */
17696 error_occurred = cp_parser_error_occurred (parser);
17697 /* Remove the topmost context from the stack. */
17698 context = parser->context;
17699 parser->context = context->next;
17700 /* If no parse errors occurred, commit to the tentative parse. */
17701 if (!error_occurred)
17703 /* Commit to the tokens read tentatively, unless that was
17705 if (context->status != CP_PARSER_STATUS_KIND_COMMITTED)
17706 cp_lexer_commit_tokens (parser->lexer);
17708 pop_to_parent_deferring_access_checks ();
17710 /* Otherwise, if errors occurred, roll back our state so that things
17711 are just as they were before we began the tentative parse. */
17714 cp_lexer_rollback_tokens (parser->lexer);
17715 pop_deferring_access_checks ();
17717 /* Add the context to the front of the free list. */
17718 context->next = cp_parser_context_free_list;
17719 cp_parser_context_free_list = context;
17721 return !error_occurred;
17724 /* Returns true if we are parsing tentatively and are not committed to
17725 this tentative parse. */
17728 cp_parser_uncommitted_to_tentative_parse_p (cp_parser* parser)
17730 return (cp_parser_parsing_tentatively (parser)
17731 && parser->context->status != CP_PARSER_STATUS_KIND_COMMITTED);
17734 /* Returns nonzero iff an error has occurred during the most recent
17735 tentative parse. */
17738 cp_parser_error_occurred (cp_parser* parser)
17740 return (cp_parser_parsing_tentatively (parser)
17741 && parser->context->status == CP_PARSER_STATUS_KIND_ERROR);
17744 /* Returns nonzero if GNU extensions are allowed. */
17747 cp_parser_allow_gnu_extensions_p (cp_parser* parser)
17749 return parser->allow_gnu_extensions_p;
17752 /* Objective-C++ Productions */
17755 /* Parse an Objective-C expression, which feeds into a primary-expression
17759 objc-message-expression
17760 objc-string-literal
17761 objc-encode-expression
17762 objc-protocol-expression
17763 objc-selector-expression
17765 Returns a tree representation of the expression. */
17768 cp_parser_objc_expression (cp_parser* parser)
17770 /* Try to figure out what kind of declaration is present. */
17771 cp_token *kwd = cp_lexer_peek_token (parser->lexer);
17775 case CPP_OPEN_SQUARE:
17776 return cp_parser_objc_message_expression (parser);
17778 case CPP_OBJC_STRING:
17779 kwd = cp_lexer_consume_token (parser->lexer);
17780 return objc_build_string_object (kwd->u.value);
17783 switch (kwd->keyword)
17785 case RID_AT_ENCODE:
17786 return cp_parser_objc_encode_expression (parser);
17788 case RID_AT_PROTOCOL:
17789 return cp_parser_objc_protocol_expression (parser);
17791 case RID_AT_SELECTOR:
17792 return cp_parser_objc_selector_expression (parser);
17798 error ("misplaced %<@%D%> Objective-C++ construct", kwd->u.value);
17799 cp_parser_skip_to_end_of_block_or_statement (parser);
17802 return error_mark_node;
17805 /* Parse an Objective-C message expression.
17807 objc-message-expression:
17808 [ objc-message-receiver objc-message-args ]
17810 Returns a representation of an Objective-C message. */
17813 cp_parser_objc_message_expression (cp_parser* parser)
17815 tree receiver, messageargs;
17817 cp_lexer_consume_token (parser->lexer); /* Eat '['. */
17818 receiver = cp_parser_objc_message_receiver (parser);
17819 messageargs = cp_parser_objc_message_args (parser);
17820 cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'");
17822 return objc_build_message_expr (build_tree_list (receiver, messageargs));
17825 /* Parse an objc-message-receiver.
17827 objc-message-receiver:
17829 simple-type-specifier
17831 Returns a representation of the type or expression. */
17834 cp_parser_objc_message_receiver (cp_parser* parser)
17838 /* An Objective-C message receiver may be either (1) a type
17839 or (2) an expression. */
17840 cp_parser_parse_tentatively (parser);
17841 rcv = cp_parser_expression (parser, false);
17843 if (cp_parser_parse_definitely (parser))
17846 rcv = cp_parser_simple_type_specifier (parser,
17847 /*decl_specs=*/NULL,
17848 CP_PARSER_FLAGS_NONE);
17850 return objc_get_class_reference (rcv);
17853 /* Parse the arguments and selectors comprising an Objective-C message.
17858 objc-selector-args , objc-comma-args
17860 objc-selector-args:
17861 objc-selector [opt] : assignment-expression
17862 objc-selector-args objc-selector [opt] : assignment-expression
17865 assignment-expression
17866 objc-comma-args , assignment-expression
17868 Returns a TREE_LIST, with TREE_PURPOSE containing a list of
17869 selector arguments and TREE_VALUE containing a list of comma
17873 cp_parser_objc_message_args (cp_parser* parser)
17875 tree sel_args = NULL_TREE, addl_args = NULL_TREE;
17876 bool maybe_unary_selector_p = true;
17877 cp_token *token = cp_lexer_peek_token (parser->lexer);
17879 while (cp_parser_objc_selector_p (token->type) || token->type == CPP_COLON)
17881 tree selector = NULL_TREE, arg;
17883 if (token->type != CPP_COLON)
17884 selector = cp_parser_objc_selector (parser);
17886 /* Detect if we have a unary selector. */
17887 if (maybe_unary_selector_p
17888 && cp_lexer_next_token_is_not (parser->lexer, CPP_COLON))
17889 return build_tree_list (selector, NULL_TREE);
17891 maybe_unary_selector_p = false;
17892 cp_parser_require (parser, CPP_COLON, "`:'");
17893 arg = cp_parser_assignment_expression (parser, false);
17896 = chainon (sel_args,
17897 build_tree_list (selector, arg));
17899 token = cp_lexer_peek_token (parser->lexer);
17902 /* Handle non-selector arguments, if any. */
17903 while (token->type == CPP_COMMA)
17907 cp_lexer_consume_token (parser->lexer);
17908 arg = cp_parser_assignment_expression (parser, false);
17911 = chainon (addl_args,
17912 build_tree_list (NULL_TREE, arg));
17914 token = cp_lexer_peek_token (parser->lexer);
17917 return build_tree_list (sel_args, addl_args);
17920 /* Parse an Objective-C encode expression.
17922 objc-encode-expression:
17923 @encode objc-typename
17925 Returns an encoded representation of the type argument. */
17928 cp_parser_objc_encode_expression (cp_parser* parser)
17932 cp_lexer_consume_token (parser->lexer); /* Eat '@encode'. */
17933 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
17934 type = complete_type (cp_parser_type_id (parser));
17935 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
17939 error ("%<@encode%> must specify a type as an argument");
17940 return error_mark_node;
17943 return objc_build_encode_expr (type);
17946 /* Parse an Objective-C @defs expression. */
17949 cp_parser_objc_defs_expression (cp_parser *parser)
17953 cp_lexer_consume_token (parser->lexer); /* Eat '@defs'. */
17954 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
17955 name = cp_parser_identifier (parser);
17956 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
17958 return objc_get_class_ivars (name);
17961 /* Parse an Objective-C protocol expression.
17963 objc-protocol-expression:
17964 @protocol ( identifier )
17966 Returns a representation of the protocol expression. */
17969 cp_parser_objc_protocol_expression (cp_parser* parser)
17973 cp_lexer_consume_token (parser->lexer); /* Eat '@protocol'. */
17974 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
17975 proto = cp_parser_identifier (parser);
17976 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
17978 return objc_build_protocol_expr (proto);
17981 /* Parse an Objective-C selector expression.
17983 objc-selector-expression:
17984 @selector ( objc-method-signature )
17986 objc-method-signature:
17992 objc-selector-seq objc-selector :
17994 Returns a representation of the method selector. */
17997 cp_parser_objc_selector_expression (cp_parser* parser)
17999 tree sel_seq = NULL_TREE;
18000 bool maybe_unary_selector_p = true;
18003 cp_lexer_consume_token (parser->lexer); /* Eat '@selector'. */
18004 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
18005 token = cp_lexer_peek_token (parser->lexer);
18007 while (cp_parser_objc_selector_p (token->type) || token->type == CPP_COLON
18008 || token->type == CPP_SCOPE)
18010 tree selector = NULL_TREE;
18012 if (token->type != CPP_COLON
18013 || token->type == CPP_SCOPE)
18014 selector = cp_parser_objc_selector (parser);
18016 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COLON)
18017 && cp_lexer_next_token_is_not (parser->lexer, CPP_SCOPE))
18019 /* Detect if we have a unary selector. */
18020 if (maybe_unary_selector_p)
18022 sel_seq = selector;
18023 goto finish_selector;
18027 cp_parser_error (parser, "expected %<:%>");
18030 maybe_unary_selector_p = false;
18031 token = cp_lexer_consume_token (parser->lexer);
18033 if (token->type == CPP_SCOPE)
18036 = chainon (sel_seq,
18037 build_tree_list (selector, NULL_TREE));
18039 = chainon (sel_seq,
18040 build_tree_list (NULL_TREE, NULL_TREE));
18044 = chainon (sel_seq,
18045 build_tree_list (selector, NULL_TREE));
18047 token = cp_lexer_peek_token (parser->lexer);
18051 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
18053 return objc_build_selector_expr (sel_seq);
18056 /* Parse a list of identifiers.
18058 objc-identifier-list:
18060 objc-identifier-list , identifier
18062 Returns a TREE_LIST of identifier nodes. */
18065 cp_parser_objc_identifier_list (cp_parser* parser)
18067 tree list = build_tree_list (NULL_TREE, cp_parser_identifier (parser));
18068 cp_token *sep = cp_lexer_peek_token (parser->lexer);
18070 while (sep->type == CPP_COMMA)
18072 cp_lexer_consume_token (parser->lexer); /* Eat ','. */
18073 list = chainon (list,
18074 build_tree_list (NULL_TREE,
18075 cp_parser_identifier (parser)));
18076 sep = cp_lexer_peek_token (parser->lexer);
18082 /* Parse an Objective-C alias declaration.
18084 objc-alias-declaration:
18085 @compatibility_alias identifier identifier ;
18087 This function registers the alias mapping with the Objective-C front end.
18088 It returns nothing. */
18091 cp_parser_objc_alias_declaration (cp_parser* parser)
18095 cp_lexer_consume_token (parser->lexer); /* Eat '@compatibility_alias'. */
18096 alias = cp_parser_identifier (parser);
18097 orig = cp_parser_identifier (parser);
18098 objc_declare_alias (alias, orig);
18099 cp_parser_consume_semicolon_at_end_of_statement (parser);
18102 /* Parse an Objective-C class forward-declaration.
18104 objc-class-declaration:
18105 @class objc-identifier-list ;
18107 The function registers the forward declarations with the Objective-C
18108 front end. It returns nothing. */
18111 cp_parser_objc_class_declaration (cp_parser* parser)
18113 cp_lexer_consume_token (parser->lexer); /* Eat '@class'. */
18114 objc_declare_class (cp_parser_objc_identifier_list (parser));
18115 cp_parser_consume_semicolon_at_end_of_statement (parser);
18118 /* Parse a list of Objective-C protocol references.
18120 objc-protocol-refs-opt:
18121 objc-protocol-refs [opt]
18123 objc-protocol-refs:
18124 < objc-identifier-list >
18126 Returns a TREE_LIST of identifiers, if any. */
18129 cp_parser_objc_protocol_refs_opt (cp_parser* parser)
18131 tree protorefs = NULL_TREE;
18133 if(cp_lexer_next_token_is (parser->lexer, CPP_LESS))
18135 cp_lexer_consume_token (parser->lexer); /* Eat '<'. */
18136 protorefs = cp_parser_objc_identifier_list (parser);
18137 cp_parser_require (parser, CPP_GREATER, "`>'");
18143 /* Parse a Objective-C visibility specification. */
18146 cp_parser_objc_visibility_spec (cp_parser* parser)
18148 cp_token *vis = cp_lexer_peek_token (parser->lexer);
18150 switch (vis->keyword)
18152 case RID_AT_PRIVATE:
18153 objc_set_visibility (2);
18155 case RID_AT_PROTECTED:
18156 objc_set_visibility (0);
18158 case RID_AT_PUBLIC:
18159 objc_set_visibility (1);
18165 /* Eat '@private'/'@protected'/'@public'. */
18166 cp_lexer_consume_token (parser->lexer);
18169 /* Parse an Objective-C method type. */
18172 cp_parser_objc_method_type (cp_parser* parser)
18174 objc_set_method_type
18175 (cp_lexer_consume_token (parser->lexer)->type == CPP_PLUS
18180 /* Parse an Objective-C protocol qualifier. */
18183 cp_parser_objc_protocol_qualifiers (cp_parser* parser)
18185 tree quals = NULL_TREE, node;
18186 cp_token *token = cp_lexer_peek_token (parser->lexer);
18188 node = token->u.value;
18190 while (node && TREE_CODE (node) == IDENTIFIER_NODE
18191 && (node == ridpointers [(int) RID_IN]
18192 || node == ridpointers [(int) RID_OUT]
18193 || node == ridpointers [(int) RID_INOUT]
18194 || node == ridpointers [(int) RID_BYCOPY]
18195 || node == ridpointers [(int) RID_BYREF]
18196 || node == ridpointers [(int) RID_ONEWAY]))
18198 quals = tree_cons (NULL_TREE, node, quals);
18199 cp_lexer_consume_token (parser->lexer);
18200 token = cp_lexer_peek_token (parser->lexer);
18201 node = token->u.value;
18207 /* Parse an Objective-C typename. */
18210 cp_parser_objc_typename (cp_parser* parser)
18212 tree typename = NULL_TREE;
18214 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
18216 tree proto_quals, cp_type = NULL_TREE;
18218 cp_lexer_consume_token (parser->lexer); /* Eat '('. */
18219 proto_quals = cp_parser_objc_protocol_qualifiers (parser);
18221 /* An ObjC type name may consist of just protocol qualifiers, in which
18222 case the type shall default to 'id'. */
18223 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN))
18224 cp_type = cp_parser_type_id (parser);
18226 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
18227 typename = build_tree_list (proto_quals, cp_type);
18233 /* Check to see if TYPE refers to an Objective-C selector name. */
18236 cp_parser_objc_selector_p (enum cpp_ttype type)
18238 return (type == CPP_NAME || type == CPP_KEYWORD
18239 || type == CPP_AND_AND || type == CPP_AND_EQ || type == CPP_AND
18240 || type == CPP_OR || type == CPP_COMPL || type == CPP_NOT
18241 || type == CPP_NOT_EQ || type == CPP_OR_OR || type == CPP_OR_EQ
18242 || type == CPP_XOR || type == CPP_XOR_EQ);
18245 /* Parse an Objective-C selector. */
18248 cp_parser_objc_selector (cp_parser* parser)
18250 cp_token *token = cp_lexer_consume_token (parser->lexer);
18252 if (!cp_parser_objc_selector_p (token->type))
18254 error ("invalid Objective-C++ selector name");
18255 return error_mark_node;
18258 /* C++ operator names are allowed to appear in ObjC selectors. */
18259 switch (token->type)
18261 case CPP_AND_AND: return get_identifier ("and");
18262 case CPP_AND_EQ: return get_identifier ("and_eq");
18263 case CPP_AND: return get_identifier ("bitand");
18264 case CPP_OR: return get_identifier ("bitor");
18265 case CPP_COMPL: return get_identifier ("compl");
18266 case CPP_NOT: return get_identifier ("not");
18267 case CPP_NOT_EQ: return get_identifier ("not_eq");
18268 case CPP_OR_OR: return get_identifier ("or");
18269 case CPP_OR_EQ: return get_identifier ("or_eq");
18270 case CPP_XOR: return get_identifier ("xor");
18271 case CPP_XOR_EQ: return get_identifier ("xor_eq");
18272 default: return token->u.value;
18276 /* Parse an Objective-C params list. */
18279 cp_parser_objc_method_keyword_params (cp_parser* parser)
18281 tree params = NULL_TREE;
18282 bool maybe_unary_selector_p = true;
18283 cp_token *token = cp_lexer_peek_token (parser->lexer);
18285 while (cp_parser_objc_selector_p (token->type) || token->type == CPP_COLON)
18287 tree selector = NULL_TREE, typename, identifier;
18289 if (token->type != CPP_COLON)
18290 selector = cp_parser_objc_selector (parser);
18292 /* Detect if we have a unary selector. */
18293 if (maybe_unary_selector_p
18294 && cp_lexer_next_token_is_not (parser->lexer, CPP_COLON))
18297 maybe_unary_selector_p = false;
18298 cp_parser_require (parser, CPP_COLON, "`:'");
18299 typename = cp_parser_objc_typename (parser);
18300 identifier = cp_parser_identifier (parser);
18304 objc_build_keyword_decl (selector,
18308 token = cp_lexer_peek_token (parser->lexer);
18314 /* Parse the non-keyword Objective-C params. */
18317 cp_parser_objc_method_tail_params_opt (cp_parser* parser, bool *ellipsisp)
18319 tree params = make_node (TREE_LIST);
18320 cp_token *token = cp_lexer_peek_token (parser->lexer);
18321 *ellipsisp = false; /* Initially, assume no ellipsis. */
18323 while (token->type == CPP_COMMA)
18325 cp_parameter_declarator *parmdecl;
18328 cp_lexer_consume_token (parser->lexer); /* Eat ','. */
18329 token = cp_lexer_peek_token (parser->lexer);
18331 if (token->type == CPP_ELLIPSIS)
18333 cp_lexer_consume_token (parser->lexer); /* Eat '...'. */
18338 parmdecl = cp_parser_parameter_declaration (parser, false, NULL);
18339 parm = grokdeclarator (parmdecl->declarator,
18340 &parmdecl->decl_specifiers,
18341 PARM, /*initialized=*/0,
18342 /*attrlist=*/NULL);
18344 chainon (params, build_tree_list (NULL_TREE, parm));
18345 token = cp_lexer_peek_token (parser->lexer);
18351 /* Parse a linkage specification, a pragma, an extra semicolon or a block. */
18354 cp_parser_objc_interstitial_code (cp_parser* parser)
18356 cp_token *token = cp_lexer_peek_token (parser->lexer);
18358 /* If the next token is `extern' and the following token is a string
18359 literal, then we have a linkage specification. */
18360 if (token->keyword == RID_EXTERN
18361 && cp_parser_is_string_literal (cp_lexer_peek_nth_token (parser->lexer, 2)))
18362 cp_parser_linkage_specification (parser);
18363 /* Handle #pragma, if any. */
18364 else if (token->type == CPP_PRAGMA)
18365 cp_parser_pragma (parser, pragma_external);
18366 /* Allow stray semicolons. */
18367 else if (token->type == CPP_SEMICOLON)
18368 cp_lexer_consume_token (parser->lexer);
18369 /* Finally, try to parse a block-declaration, or a function-definition. */
18371 cp_parser_block_declaration (parser, /*statement_p=*/false);
18374 /* Parse a method signature. */
18377 cp_parser_objc_method_signature (cp_parser* parser)
18379 tree rettype, kwdparms, optparms;
18380 bool ellipsis = false;
18382 cp_parser_objc_method_type (parser);
18383 rettype = cp_parser_objc_typename (parser);
18384 kwdparms = cp_parser_objc_method_keyword_params (parser);
18385 optparms = cp_parser_objc_method_tail_params_opt (parser, &ellipsis);
18387 return objc_build_method_signature (rettype, kwdparms, optparms, ellipsis);
18390 /* Pars an Objective-C method prototype list. */
18393 cp_parser_objc_method_prototype_list (cp_parser* parser)
18395 cp_token *token = cp_lexer_peek_token (parser->lexer);
18397 while (token->keyword != RID_AT_END)
18399 if (token->type == CPP_PLUS || token->type == CPP_MINUS)
18401 objc_add_method_declaration
18402 (cp_parser_objc_method_signature (parser));
18403 cp_parser_consume_semicolon_at_end_of_statement (parser);
18406 /* Allow for interspersed non-ObjC++ code. */
18407 cp_parser_objc_interstitial_code (parser);
18409 token = cp_lexer_peek_token (parser->lexer);
18412 cp_lexer_consume_token (parser->lexer); /* Eat '@end'. */
18413 objc_finish_interface ();
18416 /* Parse an Objective-C method definition list. */
18419 cp_parser_objc_method_definition_list (cp_parser* parser)
18421 cp_token *token = cp_lexer_peek_token (parser->lexer);
18423 while (token->keyword != RID_AT_END)
18427 if (token->type == CPP_PLUS || token->type == CPP_MINUS)
18429 push_deferring_access_checks (dk_deferred);
18430 objc_start_method_definition
18431 (cp_parser_objc_method_signature (parser));
18433 /* For historical reasons, we accept an optional semicolon. */
18434 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
18435 cp_lexer_consume_token (parser->lexer);
18437 perform_deferred_access_checks ();
18438 stop_deferring_access_checks ();
18439 meth = cp_parser_function_definition_after_declarator (parser,
18441 pop_deferring_access_checks ();
18442 objc_finish_method_definition (meth);
18445 /* Allow for interspersed non-ObjC++ code. */
18446 cp_parser_objc_interstitial_code (parser);
18448 token = cp_lexer_peek_token (parser->lexer);
18451 cp_lexer_consume_token (parser->lexer); /* Eat '@end'. */
18452 objc_finish_implementation ();
18455 /* Parse Objective-C ivars. */
18458 cp_parser_objc_class_ivars (cp_parser* parser)
18460 cp_token *token = cp_lexer_peek_token (parser->lexer);
18462 if (token->type != CPP_OPEN_BRACE)
18463 return; /* No ivars specified. */
18465 cp_lexer_consume_token (parser->lexer); /* Eat '{'. */
18466 token = cp_lexer_peek_token (parser->lexer);
18468 while (token->type != CPP_CLOSE_BRACE)
18470 cp_decl_specifier_seq declspecs;
18471 int decl_class_or_enum_p;
18472 tree prefix_attributes;
18474 cp_parser_objc_visibility_spec (parser);
18476 if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE))
18479 cp_parser_decl_specifier_seq (parser,
18480 CP_PARSER_FLAGS_OPTIONAL,
18482 &decl_class_or_enum_p);
18483 prefix_attributes = declspecs.attributes;
18484 declspecs.attributes = NULL_TREE;
18486 /* Keep going until we hit the `;' at the end of the
18488 while (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
18490 tree width = NULL_TREE, attributes, first_attribute, decl;
18491 cp_declarator *declarator = NULL;
18492 int ctor_dtor_or_conv_p;
18494 /* Check for a (possibly unnamed) bitfield declaration. */
18495 token = cp_lexer_peek_token (parser->lexer);
18496 if (token->type == CPP_COLON)
18499 if (token->type == CPP_NAME
18500 && (cp_lexer_peek_nth_token (parser->lexer, 2)->type
18503 /* Get the name of the bitfield. */
18504 declarator = make_id_declarator (NULL_TREE,
18505 cp_parser_identifier (parser),
18509 cp_lexer_consume_token (parser->lexer); /* Eat ':'. */
18510 /* Get the width of the bitfield. */
18512 = cp_parser_constant_expression (parser,
18513 /*allow_non_constant=*/false,
18518 /* Parse the declarator. */
18520 = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED,
18521 &ctor_dtor_or_conv_p,
18522 /*parenthesized_p=*/NULL,
18523 /*member_p=*/false);
18526 /* Look for attributes that apply to the ivar. */
18527 attributes = cp_parser_attributes_opt (parser);
18528 /* Remember which attributes are prefix attributes and
18530 first_attribute = attributes;
18531 /* Combine the attributes. */
18532 attributes = chainon (prefix_attributes, attributes);
18536 /* Create the bitfield declaration. */
18537 decl = grokbitfield (declarator, &declspecs, width);
18538 cplus_decl_attributes (&decl, attributes, /*flags=*/0);
18541 decl = grokfield (declarator, &declspecs,
18542 NULL_TREE, /*init_const_expr_p=*/false,
18543 NULL_TREE, attributes);
18545 /* Add the instance variable. */
18546 objc_add_instance_variable (decl);
18548 /* Reset PREFIX_ATTRIBUTES. */
18549 while (attributes && TREE_CHAIN (attributes) != first_attribute)
18550 attributes = TREE_CHAIN (attributes);
18552 TREE_CHAIN (attributes) = NULL_TREE;
18554 token = cp_lexer_peek_token (parser->lexer);
18556 if (token->type == CPP_COMMA)
18558 cp_lexer_consume_token (parser->lexer); /* Eat ','. */
18564 cp_parser_consume_semicolon_at_end_of_statement (parser);
18565 token = cp_lexer_peek_token (parser->lexer);
18568 cp_lexer_consume_token (parser->lexer); /* Eat '}'. */
18569 /* For historical reasons, we accept an optional semicolon. */
18570 if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON))
18571 cp_lexer_consume_token (parser->lexer);
18574 /* Parse an Objective-C protocol declaration. */
18577 cp_parser_objc_protocol_declaration (cp_parser* parser)
18579 tree proto, protorefs;
18582 cp_lexer_consume_token (parser->lexer); /* Eat '@protocol'. */
18583 if (cp_lexer_next_token_is_not (parser->lexer, CPP_NAME))
18585 error ("identifier expected after %<@protocol%>");
18589 /* See if we have a forward declaration or a definition. */
18590 tok = cp_lexer_peek_nth_token (parser->lexer, 2);
18592 /* Try a forward declaration first. */
18593 if (tok->type == CPP_COMMA || tok->type == CPP_SEMICOLON)
18595 objc_declare_protocols (cp_parser_objc_identifier_list (parser));
18597 cp_parser_consume_semicolon_at_end_of_statement (parser);
18600 /* Ok, we got a full-fledged definition (or at least should). */
18603 proto = cp_parser_identifier (parser);
18604 protorefs = cp_parser_objc_protocol_refs_opt (parser);
18605 objc_start_protocol (proto, protorefs);
18606 cp_parser_objc_method_prototype_list (parser);
18610 /* Parse an Objective-C superclass or category. */
18613 cp_parser_objc_superclass_or_category (cp_parser *parser, tree *super,
18616 cp_token *next = cp_lexer_peek_token (parser->lexer);
18618 *super = *categ = NULL_TREE;
18619 if (next->type == CPP_COLON)
18621 cp_lexer_consume_token (parser->lexer); /* Eat ':'. */
18622 *super = cp_parser_identifier (parser);
18624 else if (next->type == CPP_OPEN_PAREN)
18626 cp_lexer_consume_token (parser->lexer); /* Eat '('. */
18627 *categ = cp_parser_identifier (parser);
18628 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
18632 /* Parse an Objective-C class interface. */
18635 cp_parser_objc_class_interface (cp_parser* parser)
18637 tree name, super, categ, protos;
18639 cp_lexer_consume_token (parser->lexer); /* Eat '@interface'. */
18640 name = cp_parser_identifier (parser);
18641 cp_parser_objc_superclass_or_category (parser, &super, &categ);
18642 protos = cp_parser_objc_protocol_refs_opt (parser);
18644 /* We have either a class or a category on our hands. */
18646 objc_start_category_interface (name, categ, protos);
18649 objc_start_class_interface (name, super, protos);
18650 /* Handle instance variable declarations, if any. */
18651 cp_parser_objc_class_ivars (parser);
18652 objc_continue_interface ();
18655 cp_parser_objc_method_prototype_list (parser);
18658 /* Parse an Objective-C class implementation. */
18661 cp_parser_objc_class_implementation (cp_parser* parser)
18663 tree name, super, categ;
18665 cp_lexer_consume_token (parser->lexer); /* Eat '@implementation'. */
18666 name = cp_parser_identifier (parser);
18667 cp_parser_objc_superclass_or_category (parser, &super, &categ);
18669 /* We have either a class or a category on our hands. */
18671 objc_start_category_implementation (name, categ);
18674 objc_start_class_implementation (name, super);
18675 /* Handle instance variable declarations, if any. */
18676 cp_parser_objc_class_ivars (parser);
18677 objc_continue_implementation ();
18680 cp_parser_objc_method_definition_list (parser);
18683 /* Consume the @end token and finish off the implementation. */
18686 cp_parser_objc_end_implementation (cp_parser* parser)
18688 cp_lexer_consume_token (parser->lexer); /* Eat '@end'. */
18689 objc_finish_implementation ();
18692 /* Parse an Objective-C declaration. */
18695 cp_parser_objc_declaration (cp_parser* parser)
18697 /* Try to figure out what kind of declaration is present. */
18698 cp_token *kwd = cp_lexer_peek_token (parser->lexer);
18700 switch (kwd->keyword)
18703 cp_parser_objc_alias_declaration (parser);
18706 cp_parser_objc_class_declaration (parser);
18708 case RID_AT_PROTOCOL:
18709 cp_parser_objc_protocol_declaration (parser);
18711 case RID_AT_INTERFACE:
18712 cp_parser_objc_class_interface (parser);
18714 case RID_AT_IMPLEMENTATION:
18715 cp_parser_objc_class_implementation (parser);
18718 cp_parser_objc_end_implementation (parser);
18721 error ("misplaced %<@%D%> Objective-C++ construct", kwd->u.value);
18722 cp_parser_skip_to_end_of_block_or_statement (parser);
18726 /* Parse an Objective-C try-catch-finally statement.
18728 objc-try-catch-finally-stmt:
18729 @try compound-statement objc-catch-clause-seq [opt]
18730 objc-finally-clause [opt]
18732 objc-catch-clause-seq:
18733 objc-catch-clause objc-catch-clause-seq [opt]
18736 @catch ( exception-declaration ) compound-statement
18738 objc-finally-clause
18739 @finally compound-statement
18741 Returns NULL_TREE. */
18744 cp_parser_objc_try_catch_finally_statement (cp_parser *parser) {
18745 location_t location;
18748 cp_parser_require_keyword (parser, RID_AT_TRY, "`@try'");
18749 location = cp_lexer_peek_token (parser->lexer)->location;
18750 /* NB: The @try block needs to be wrapped in its own STATEMENT_LIST
18751 node, lest it get absorbed into the surrounding block. */
18752 stmt = push_stmt_list ();
18753 cp_parser_compound_statement (parser, NULL, false);
18754 objc_begin_try_stmt (location, pop_stmt_list (stmt));
18756 while (cp_lexer_next_token_is_keyword (parser->lexer, RID_AT_CATCH))
18758 cp_parameter_declarator *parmdecl;
18761 cp_lexer_consume_token (parser->lexer);
18762 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
18763 parmdecl = cp_parser_parameter_declaration (parser, false, NULL);
18764 parm = grokdeclarator (parmdecl->declarator,
18765 &parmdecl->decl_specifiers,
18766 PARM, /*initialized=*/0,
18767 /*attrlist=*/NULL);
18768 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
18769 objc_begin_catch_clause (parm);
18770 cp_parser_compound_statement (parser, NULL, false);
18771 objc_finish_catch_clause ();
18774 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_AT_FINALLY))
18776 cp_lexer_consume_token (parser->lexer);
18777 location = cp_lexer_peek_token (parser->lexer)->location;
18778 /* NB: The @finally block needs to be wrapped in its own STATEMENT_LIST
18779 node, lest it get absorbed into the surrounding block. */
18780 stmt = push_stmt_list ();
18781 cp_parser_compound_statement (parser, NULL, false);
18782 objc_build_finally_clause (location, pop_stmt_list (stmt));
18785 return objc_finish_try_stmt ();
18788 /* Parse an Objective-C synchronized statement.
18790 objc-synchronized-stmt:
18791 @synchronized ( expression ) compound-statement
18793 Returns NULL_TREE. */
18796 cp_parser_objc_synchronized_statement (cp_parser *parser) {
18797 location_t location;
18800 cp_parser_require_keyword (parser, RID_AT_SYNCHRONIZED, "`@synchronized'");
18802 location = cp_lexer_peek_token (parser->lexer)->location;
18803 cp_parser_require (parser, CPP_OPEN_PAREN, "`('");
18804 lock = cp_parser_expression (parser, false);
18805 cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'");
18807 /* NB: The @synchronized block needs to be wrapped in its own STATEMENT_LIST
18808 node, lest it get absorbed into the surrounding block. */
18809 stmt = push_stmt_list ();
18810 cp_parser_compound_statement (parser, NULL, false);
18812 return objc_build_synchronized (location, lock, pop_stmt_list (stmt));
18815 /* Parse an Objective-C throw statement.
18818 @throw assignment-expression [opt] ;
18820 Returns a constructed '@throw' statement. */
18823 cp_parser_objc_throw_statement (cp_parser *parser) {
18824 tree expr = NULL_TREE;
18826 cp_parser_require_keyword (parser, RID_AT_THROW, "`@throw'");
18828 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
18829 expr = cp_parser_assignment_expression (parser, false);
18831 cp_parser_consume_semicolon_at_end_of_statement (parser);
18833 return objc_build_throw_stmt (expr);
18836 /* Parse an Objective-C statement. */
18839 cp_parser_objc_statement (cp_parser * parser) {
18840 /* Try to figure out what kind of declaration is present. */
18841 cp_token *kwd = cp_lexer_peek_token (parser->lexer);
18843 switch (kwd->keyword)
18846 return cp_parser_objc_try_catch_finally_statement (parser);
18847 case RID_AT_SYNCHRONIZED:
18848 return cp_parser_objc_synchronized_statement (parser);
18850 return cp_parser_objc_throw_statement (parser);
18852 error ("misplaced %<@%D%> Objective-C++ construct", kwd->u.value);
18853 cp_parser_skip_to_end_of_block_or_statement (parser);
18856 return error_mark_node;
18859 /* OpenMP 2.5 parsing routines. */
18861 /* Returns name of the next clause.
18862 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
18863 the token is not consumed. Otherwise appropriate pragma_omp_clause is
18864 returned and the token is consumed. */
18866 static pragma_omp_clause
18867 cp_parser_omp_clause_name (cp_parser *parser)
18869 pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE;
18871 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_IF))
18872 result = PRAGMA_OMP_CLAUSE_IF;
18873 else if (cp_lexer_next_token_is_keyword (parser->lexer, RID_DEFAULT))
18874 result = PRAGMA_OMP_CLAUSE_DEFAULT;
18875 else if (cp_lexer_next_token_is_keyword (parser->lexer, RID_PRIVATE))
18876 result = PRAGMA_OMP_CLAUSE_PRIVATE;
18877 else if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
18879 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
18880 const char *p = IDENTIFIER_POINTER (id);
18885 if (!strcmp ("copyin", p))
18886 result = PRAGMA_OMP_CLAUSE_COPYIN;
18887 else if (!strcmp ("copyprivate", p))
18888 result = PRAGMA_OMP_CLAUSE_COPYPRIVATE;
18891 if (!strcmp ("firstprivate", p))
18892 result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE;
18895 if (!strcmp ("lastprivate", p))
18896 result = PRAGMA_OMP_CLAUSE_LASTPRIVATE;
18899 if (!strcmp ("nowait", p))
18900 result = PRAGMA_OMP_CLAUSE_NOWAIT;
18901 else if (!strcmp ("num_threads", p))
18902 result = PRAGMA_OMP_CLAUSE_NUM_THREADS;
18905 if (!strcmp ("ordered", p))
18906 result = PRAGMA_OMP_CLAUSE_ORDERED;
18909 if (!strcmp ("reduction", p))
18910 result = PRAGMA_OMP_CLAUSE_REDUCTION;
18913 if (!strcmp ("schedule", p))
18914 result = PRAGMA_OMP_CLAUSE_SCHEDULE;
18915 else if (!strcmp ("shared", p))
18916 result = PRAGMA_OMP_CLAUSE_SHARED;
18921 if (result != PRAGMA_OMP_CLAUSE_NONE)
18922 cp_lexer_consume_token (parser->lexer);
18927 /* Validate that a clause of the given type does not already exist. */
18930 check_no_duplicate_clause (tree clauses, enum tree_code code, const char *name)
18934 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
18935 if (OMP_CLAUSE_CODE (c) == code)
18937 error ("too many %qs clauses", name);
18945 variable-list , identifier
18947 In addition, we match a closing parenthesis. An opening parenthesis
18948 will have been consumed by the caller.
18950 If KIND is nonzero, create the appropriate node and install the decl
18951 in OMP_CLAUSE_DECL and add the node to the head of the list.
18953 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
18954 return the list created. */
18957 cp_parser_omp_var_list_no_open (cp_parser *parser, enum omp_clause_code kind,
18964 name = cp_parser_id_expression (parser, /*template_p=*/false,
18965 /*check_dependency_p=*/true,
18966 /*template_p=*/NULL,
18967 /*declarator_p=*/false,
18968 /*optional_p=*/false);
18969 if (name == error_mark_node)
18972 decl = cp_parser_lookup_name_simple (parser, name);
18973 if (decl == error_mark_node)
18974 cp_parser_name_lookup_error (parser, name, decl, NULL);
18975 else if (kind != 0)
18977 tree u = build_omp_clause (kind);
18978 OMP_CLAUSE_DECL (u) = decl;
18979 OMP_CLAUSE_CHAIN (u) = list;
18983 list = tree_cons (decl, NULL_TREE, list);
18986 if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA))
18988 cp_lexer_consume_token (parser->lexer);
18991 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
18995 /* Try to resync to an unnested comma. Copied from
18996 cp_parser_parenthesized_expression_list. */
18998 ending = cp_parser_skip_to_closing_parenthesis (parser,
18999 /*recovering=*/true,
19001 /*consume_paren=*/true);
19009 /* Similarly, but expect leading and trailing parenthesis. This is a very
19010 common case for omp clauses. */
19013 cp_parser_omp_var_list (cp_parser *parser, enum omp_clause_code kind, tree list)
19015 if (cp_parser_require (parser, CPP_OPEN_PAREN, "`('"))
19016 return cp_parser_omp_var_list_no_open (parser, kind, list);
19021 default ( shared | none ) */
19024 cp_parser_omp_clause_default (cp_parser *parser, tree list)
19026 enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED;
19029 if (!cp_parser_require (parser, CPP_OPEN_PAREN, "`('"))
19031 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
19033 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
19034 const char *p = IDENTIFIER_POINTER (id);
19039 if (strcmp ("none", p) != 0)
19041 kind = OMP_CLAUSE_DEFAULT_NONE;
19045 if (strcmp ("shared", p) != 0)
19047 kind = OMP_CLAUSE_DEFAULT_SHARED;
19054 cp_lexer_consume_token (parser->lexer);
19059 cp_parser_error (parser, "expected %<none%> or %<shared%>");
19062 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
19063 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
19064 /*or_comma=*/false,
19065 /*consume_paren=*/true);
19067 if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED)
19070 check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default");
19071 c = build_omp_clause (OMP_CLAUSE_DEFAULT);
19072 OMP_CLAUSE_CHAIN (c) = list;
19073 OMP_CLAUSE_DEFAULT_KIND (c) = kind;
19079 if ( expression ) */
19082 cp_parser_omp_clause_if (cp_parser *parser, tree list)
19086 if (!cp_parser_require (parser, CPP_OPEN_PAREN, "`('"))
19089 t = cp_parser_condition (parser);
19091 if (t == error_mark_node
19092 || !cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
19093 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
19094 /*or_comma=*/false,
19095 /*consume_paren=*/true);
19097 check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if");
19099 c = build_omp_clause (OMP_CLAUSE_IF);
19100 OMP_CLAUSE_IF_EXPR (c) = t;
19101 OMP_CLAUSE_CHAIN (c) = list;
19110 cp_parser_omp_clause_nowait (cp_parser *parser ATTRIBUTE_UNUSED, tree list)
19114 check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait");
19116 c = build_omp_clause (OMP_CLAUSE_NOWAIT);
19117 OMP_CLAUSE_CHAIN (c) = list;
19122 num_threads ( expression ) */
19125 cp_parser_omp_clause_num_threads (cp_parser *parser, tree list)
19129 if (!cp_parser_require (parser, CPP_OPEN_PAREN, "`('"))
19132 t = cp_parser_expression (parser, false);
19134 if (t == error_mark_node
19135 || !cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
19136 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
19137 /*or_comma=*/false,
19138 /*consume_paren=*/true);
19140 check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads");
19142 c = build_omp_clause (OMP_CLAUSE_NUM_THREADS);
19143 OMP_CLAUSE_NUM_THREADS_EXPR (c) = t;
19144 OMP_CLAUSE_CHAIN (c) = list;
19153 cp_parser_omp_clause_ordered (cp_parser *parser ATTRIBUTE_UNUSED, tree list)
19157 check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered");
19159 c = build_omp_clause (OMP_CLAUSE_ORDERED);
19160 OMP_CLAUSE_CHAIN (c) = list;
19165 reduction ( reduction-operator : variable-list )
19167 reduction-operator:
19168 One of: + * - & ^ | && || */
19171 cp_parser_omp_clause_reduction (cp_parser *parser, tree list)
19173 enum tree_code code;
19176 if (!cp_parser_require (parser, CPP_OPEN_PAREN, "`('"))
19179 switch (cp_lexer_peek_token (parser->lexer)->type)
19191 code = BIT_AND_EXPR;
19194 code = BIT_XOR_EXPR;
19197 code = BIT_IOR_EXPR;
19200 code = TRUTH_ANDIF_EXPR;
19203 code = TRUTH_ORIF_EXPR;
19206 cp_parser_error (parser, "`+', `*', `-', `&', `^', `|', `&&', or `||'");
19208 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
19209 /*or_comma=*/false,
19210 /*consume_paren=*/true);
19213 cp_lexer_consume_token (parser->lexer);
19215 if (!cp_parser_require (parser, CPP_COLON, "`:'"))
19218 nlist = cp_parser_omp_var_list_no_open (parser, OMP_CLAUSE_REDUCTION, list);
19219 for (c = nlist; c != list; c = OMP_CLAUSE_CHAIN (c))
19220 OMP_CLAUSE_REDUCTION_CODE (c) = code;
19226 schedule ( schedule-kind )
19227 schedule ( schedule-kind , expression )
19230 static | dynamic | guided | runtime */
19233 cp_parser_omp_clause_schedule (cp_parser *parser, tree list)
19237 if (!cp_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
19240 c = build_omp_clause (OMP_CLAUSE_SCHEDULE);
19242 if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
19244 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
19245 const char *p = IDENTIFIER_POINTER (id);
19250 if (strcmp ("dynamic", p) != 0)
19252 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC;
19256 if (strcmp ("guided", p) != 0)
19258 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED;
19262 if (strcmp ("runtime", p) != 0)
19264 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME;
19271 else if (cp_lexer_next_token_is_keyword (parser->lexer, RID_STATIC))
19272 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC;
19275 cp_lexer_consume_token (parser->lexer);
19277 if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA))
19279 cp_lexer_consume_token (parser->lexer);
19281 t = cp_parser_assignment_expression (parser, false);
19283 if (t == error_mark_node)
19285 else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME)
19286 error ("schedule %<runtime%> does not take "
19287 "a %<chunk_size%> parameter");
19289 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t;
19291 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
19294 else if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`,' or `)'"))
19297 check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule");
19298 OMP_CLAUSE_CHAIN (c) = list;
19302 cp_parser_error (parser, "invalid schedule kind");
19304 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
19305 /*or_comma=*/false,
19306 /*consume_paren=*/true);
19310 /* Parse all OpenMP clauses. The set clauses allowed by the directive
19311 is a bitmask in MASK. Return the list of clauses found; the result
19312 of clause default goes in *pdefault. */
19315 cp_parser_omp_all_clauses (cp_parser *parser, unsigned int mask,
19316 const char *where, cp_token *pragma_tok)
19318 tree clauses = NULL;
19320 while (cp_lexer_next_token_is_not (parser->lexer, CPP_PRAGMA_EOL))
19322 pragma_omp_clause c_kind = cp_parser_omp_clause_name (parser);
19323 const char *c_name;
19324 tree prev = clauses;
19328 case PRAGMA_OMP_CLAUSE_COPYIN:
19329 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_COPYIN, clauses);
19332 case PRAGMA_OMP_CLAUSE_COPYPRIVATE:
19333 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_COPYPRIVATE,
19335 c_name = "copyprivate";
19337 case PRAGMA_OMP_CLAUSE_DEFAULT:
19338 clauses = cp_parser_omp_clause_default (parser, clauses);
19339 c_name = "default";
19341 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE:
19342 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_FIRSTPRIVATE,
19344 c_name = "firstprivate";
19346 case PRAGMA_OMP_CLAUSE_IF:
19347 clauses = cp_parser_omp_clause_if (parser, clauses);
19350 case PRAGMA_OMP_CLAUSE_LASTPRIVATE:
19351 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_LASTPRIVATE,
19353 c_name = "lastprivate";
19355 case PRAGMA_OMP_CLAUSE_NOWAIT:
19356 clauses = cp_parser_omp_clause_nowait (parser, clauses);
19359 case PRAGMA_OMP_CLAUSE_NUM_THREADS:
19360 clauses = cp_parser_omp_clause_num_threads (parser, clauses);
19361 c_name = "num_threads";
19363 case PRAGMA_OMP_CLAUSE_ORDERED:
19364 clauses = cp_parser_omp_clause_ordered (parser, clauses);
19365 c_name = "ordered";
19367 case PRAGMA_OMP_CLAUSE_PRIVATE:
19368 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_PRIVATE,
19370 c_name = "private";
19372 case PRAGMA_OMP_CLAUSE_REDUCTION:
19373 clauses = cp_parser_omp_clause_reduction (parser, clauses);
19374 c_name = "reduction";
19376 case PRAGMA_OMP_CLAUSE_SCHEDULE:
19377 clauses = cp_parser_omp_clause_schedule (parser, clauses);
19378 c_name = "schedule";
19380 case PRAGMA_OMP_CLAUSE_SHARED:
19381 clauses = cp_parser_omp_var_list (parser, OMP_CLAUSE_SHARED,
19386 cp_parser_error (parser, "expected %<#pragma omp%> clause");
19390 if (((mask >> c_kind) & 1) == 0)
19392 /* Remove the invalid clause(s) from the list to avoid
19393 confusing the rest of the compiler. */
19395 error ("%qs is not valid for %qs", c_name, where);
19399 cp_parser_skip_to_pragma_eol (parser, pragma_tok);
19400 return finish_omp_clauses (clauses);
19407 In practice, we're also interested in adding the statement to an
19408 outer node. So it is convenient if we work around the fact that
19409 cp_parser_statement calls add_stmt. */
19412 cp_parser_begin_omp_structured_block (cp_parser *parser)
19414 unsigned save = parser->in_statement;
19416 /* Only move the values to IN_OMP_BLOCK if they weren't false.
19417 This preserves the "not within loop or switch" style error messages
19418 for nonsense cases like
19424 if (parser->in_statement)
19425 parser->in_statement = IN_OMP_BLOCK;
19431 cp_parser_end_omp_structured_block (cp_parser *parser, unsigned save)
19433 parser->in_statement = save;
19437 cp_parser_omp_structured_block (cp_parser *parser)
19439 tree stmt = begin_omp_structured_block ();
19440 unsigned int save = cp_parser_begin_omp_structured_block (parser);
19442 cp_parser_statement (parser, NULL_TREE, false, NULL);
19444 cp_parser_end_omp_structured_block (parser, save);
19445 return finish_omp_structured_block (stmt);
19449 # pragma omp atomic new-line
19453 x binop= expr | x++ | ++x | x-- | --x
19455 +, *, -, /, &, ^, |, <<, >>
19457 where x is an lvalue expression with scalar type. */
19460 cp_parser_omp_atomic (cp_parser *parser, cp_token *pragma_tok)
19463 enum tree_code code;
19465 cp_parser_require_pragma_eol (parser, pragma_tok);
19467 lhs = cp_parser_unary_expression (parser, /*address_p=*/false,
19469 switch (TREE_CODE (lhs))
19474 case PREINCREMENT_EXPR:
19475 case POSTINCREMENT_EXPR:
19476 lhs = TREE_OPERAND (lhs, 0);
19478 rhs = integer_one_node;
19481 case PREDECREMENT_EXPR:
19482 case POSTDECREMENT_EXPR:
19483 lhs = TREE_OPERAND (lhs, 0);
19485 rhs = integer_one_node;
19489 switch (cp_lexer_peek_token (parser->lexer)->type)
19495 code = TRUNC_DIV_EXPR;
19503 case CPP_LSHIFT_EQ:
19504 code = LSHIFT_EXPR;
19506 case CPP_RSHIFT_EQ:
19507 code = RSHIFT_EXPR;
19510 code = BIT_AND_EXPR;
19513 code = BIT_IOR_EXPR;
19516 code = BIT_XOR_EXPR;
19519 cp_parser_error (parser,
19520 "invalid operator for %<#pragma omp atomic%>");
19523 cp_lexer_consume_token (parser->lexer);
19525 rhs = cp_parser_expression (parser, false);
19526 if (rhs == error_mark_node)
19530 finish_omp_atomic (code, lhs, rhs);
19531 cp_parser_consume_semicolon_at_end_of_statement (parser);
19535 cp_parser_skip_to_end_of_block_or_statement (parser);
19540 # pragma omp barrier new-line */
19543 cp_parser_omp_barrier (cp_parser *parser, cp_token *pragma_tok)
19545 cp_parser_require_pragma_eol (parser, pragma_tok);
19546 finish_omp_barrier ();
19550 # pragma omp critical [(name)] new-line
19551 structured-block */
19554 cp_parser_omp_critical (cp_parser *parser, cp_token *pragma_tok)
19556 tree stmt, name = NULL;
19558 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
19560 cp_lexer_consume_token (parser->lexer);
19562 name = cp_parser_identifier (parser);
19564 if (name == error_mark_node
19565 || !cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
19566 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
19567 /*or_comma=*/false,
19568 /*consume_paren=*/true);
19569 if (name == error_mark_node)
19572 cp_parser_require_pragma_eol (parser, pragma_tok);
19574 stmt = cp_parser_omp_structured_block (parser);
19575 return c_finish_omp_critical (stmt, name);
19579 # pragma omp flush flush-vars[opt] new-line
19582 ( variable-list ) */
19585 cp_parser_omp_flush (cp_parser *parser, cp_token *pragma_tok)
19587 if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN))
19588 (void) cp_parser_omp_var_list (parser, 0, NULL);
19589 cp_parser_require_pragma_eol (parser, pragma_tok);
19591 finish_omp_flush ();
19594 /* Parse the restricted form of the for statment allowed by OpenMP. */
19597 cp_parser_omp_for_loop (cp_parser *parser)
19599 tree init, cond, incr, body, decl, pre_body;
19602 if (!cp_lexer_next_token_is_keyword (parser->lexer, RID_FOR))
19604 cp_parser_error (parser, "for statement expected");
19607 loc = cp_lexer_consume_token (parser->lexer)->location;
19608 if (!cp_parser_require (parser, CPP_OPEN_PAREN, "`('"))
19611 init = decl = NULL;
19612 pre_body = push_stmt_list ();
19613 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
19615 cp_decl_specifier_seq type_specifiers;
19617 /* First, try to parse as an initialized declaration. See
19618 cp_parser_condition, from whence the bulk of this is copied. */
19620 cp_parser_parse_tentatively (parser);
19621 cp_parser_type_specifier_seq (parser, /*is_condition=*/false,
19623 if (!cp_parser_error_occurred (parser))
19625 tree asm_specification, attributes;
19626 cp_declarator *declarator;
19628 declarator = cp_parser_declarator (parser,
19629 CP_PARSER_DECLARATOR_NAMED,
19630 /*ctor_dtor_or_conv_p=*/NULL,
19631 /*parenthesized_p=*/NULL,
19632 /*member_p=*/false);
19633 attributes = cp_parser_attributes_opt (parser);
19634 asm_specification = cp_parser_asm_specification_opt (parser);
19636 cp_parser_require (parser, CPP_EQ, "`='");
19637 if (cp_parser_parse_definitely (parser))
19641 decl = start_decl (declarator, &type_specifiers,
19642 /*initialized_p=*/false, attributes,
19643 /*prefix_attributes=*/NULL_TREE,
19646 init = cp_parser_assignment_expression (parser, false);
19648 cp_finish_decl (decl, NULL_TREE, /*init_const_expr_p=*/false,
19649 asm_specification, LOOKUP_ONLYCONVERTING);
19652 pop_scope (pushed_scope);
19656 cp_parser_abort_tentative_parse (parser);
19658 /* If parsing as an initialized declaration failed, try again as
19659 a simple expression. */
19661 init = cp_parser_expression (parser, false);
19663 cp_parser_require (parser, CPP_SEMICOLON, "`;'");
19664 pre_body = pop_stmt_list (pre_body);
19667 if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON))
19668 cond = cp_parser_condition (parser);
19669 cp_parser_require (parser, CPP_SEMICOLON, "`;'");
19672 if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN))
19673 incr = cp_parser_expression (parser, false);
19675 if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"))
19676 cp_parser_skip_to_closing_parenthesis (parser, /*recovering=*/true,
19677 /*or_comma=*/false,
19678 /*consume_paren=*/true);
19680 /* Note that we saved the original contents of this flag when we entered
19681 the structured block, and so we don't need to re-save it here. */
19682 parser->in_statement = IN_OMP_FOR;
19684 /* Note that the grammar doesn't call for a structured block here,
19685 though the loop as a whole is a structured block. */
19686 body = push_stmt_list ();
19687 cp_parser_statement (parser, NULL_TREE, false, NULL);
19688 body = pop_stmt_list (body);
19690 return finish_omp_for (loc, decl, init, cond, incr, body, pre_body);
19694 #pragma omp for for-clause[optseq] new-line
19697 #define OMP_FOR_CLAUSE_MASK \
19698 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
19699 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
19700 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
19701 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
19702 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
19703 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
19704 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
19707 cp_parser_omp_for (cp_parser *parser, cp_token *pragma_tok)
19709 tree clauses, sb, ret;
19712 clauses = cp_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK,
19713 "#pragma omp for", pragma_tok);
19715 sb = begin_omp_structured_block ();
19716 save = cp_parser_begin_omp_structured_block (parser);
19718 ret = cp_parser_omp_for_loop (parser);
19720 OMP_FOR_CLAUSES (ret) = clauses;
19722 cp_parser_end_omp_structured_block (parser, save);
19723 add_stmt (finish_omp_structured_block (sb));
19729 # pragma omp master new-line
19730 structured-block */
19733 cp_parser_omp_master (cp_parser *parser, cp_token *pragma_tok)
19735 cp_parser_require_pragma_eol (parser, pragma_tok);
19736 return c_finish_omp_master (cp_parser_omp_structured_block (parser));
19740 # pragma omp ordered new-line
19741 structured-block */
19744 cp_parser_omp_ordered (cp_parser *parser, cp_token *pragma_tok)
19746 cp_parser_require_pragma_eol (parser, pragma_tok);
19747 return c_finish_omp_ordered (cp_parser_omp_structured_block (parser));
19753 { section-sequence }
19756 section-directive[opt] structured-block
19757 section-sequence section-directive structured-block */
19760 cp_parser_omp_sections_scope (cp_parser *parser)
19762 tree stmt, substmt;
19763 bool error_suppress = false;
19766 if (!cp_parser_require (parser, CPP_OPEN_BRACE, "`{'"))
19769 stmt = push_stmt_list ();
19771 if (cp_lexer_peek_token (parser->lexer)->pragma_kind != PRAGMA_OMP_SECTION)
19775 substmt = begin_omp_structured_block ();
19776 save = cp_parser_begin_omp_structured_block (parser);
19780 cp_parser_statement (parser, NULL_TREE, false, NULL);
19782 tok = cp_lexer_peek_token (parser->lexer);
19783 if (tok->pragma_kind == PRAGMA_OMP_SECTION)
19785 if (tok->type == CPP_CLOSE_BRACE)
19787 if (tok->type == CPP_EOF)
19791 cp_parser_end_omp_structured_block (parser, save);
19792 substmt = finish_omp_structured_block (substmt);
19793 substmt = build1 (OMP_SECTION, void_type_node, substmt);
19794 add_stmt (substmt);
19799 tok = cp_lexer_peek_token (parser->lexer);
19800 if (tok->type == CPP_CLOSE_BRACE)
19802 if (tok->type == CPP_EOF)
19805 if (tok->pragma_kind == PRAGMA_OMP_SECTION)
19807 cp_lexer_consume_token (parser->lexer);
19808 cp_parser_require_pragma_eol (parser, tok);
19809 error_suppress = false;
19811 else if (!error_suppress)
19813 cp_parser_error (parser, "expected %<#pragma omp section%> or %<}%>");
19814 error_suppress = true;
19817 substmt = cp_parser_omp_structured_block (parser);
19818 substmt = build1 (OMP_SECTION, void_type_node, substmt);
19819 add_stmt (substmt);
19821 cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'");
19823 substmt = pop_stmt_list (stmt);
19825 stmt = make_node (OMP_SECTIONS);
19826 TREE_TYPE (stmt) = void_type_node;
19827 OMP_SECTIONS_BODY (stmt) = substmt;
19834 # pragma omp sections sections-clause[optseq] newline
19837 #define OMP_SECTIONS_CLAUSE_MASK \
19838 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
19839 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
19840 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
19841 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
19842 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
19845 cp_parser_omp_sections (cp_parser *parser, cp_token *pragma_tok)
19849 clauses = cp_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK,
19850 "#pragma omp sections", pragma_tok);
19852 ret = cp_parser_omp_sections_scope (parser);
19854 OMP_SECTIONS_CLAUSES (ret) = clauses;
19860 # pragma parallel parallel-clause new-line
19861 # pragma parallel for parallel-for-clause new-line
19862 # pragma parallel sections parallel-sections-clause new-line */
19864 #define OMP_PARALLEL_CLAUSE_MASK \
19865 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
19866 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
19867 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
19868 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
19869 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
19870 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
19871 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
19872 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
19875 cp_parser_omp_parallel (cp_parser *parser, cp_token *pragma_tok)
19877 enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL;
19878 const char *p_name = "#pragma omp parallel";
19879 tree stmt, clauses, par_clause, ws_clause, block;
19880 unsigned int mask = OMP_PARALLEL_CLAUSE_MASK;
19883 if (cp_lexer_next_token_is_keyword (parser->lexer, RID_FOR))
19885 cp_lexer_consume_token (parser->lexer);
19886 p_kind = PRAGMA_OMP_PARALLEL_FOR;
19887 p_name = "#pragma omp parallel for";
19888 mask |= OMP_FOR_CLAUSE_MASK;
19889 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
19891 else if (cp_lexer_next_token_is (parser->lexer, CPP_NAME))
19893 tree id = cp_lexer_peek_token (parser->lexer)->u.value;
19894 const char *p = IDENTIFIER_POINTER (id);
19895 if (strcmp (p, "sections") == 0)
19897 cp_lexer_consume_token (parser->lexer);
19898 p_kind = PRAGMA_OMP_PARALLEL_SECTIONS;
19899 p_name = "#pragma omp parallel sections";
19900 mask |= OMP_SECTIONS_CLAUSE_MASK;
19901 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
19905 clauses = cp_parser_omp_all_clauses (parser, mask, p_name, pragma_tok);
19906 block = begin_omp_parallel ();
19907 save = cp_parser_begin_omp_structured_block (parser);
19911 case PRAGMA_OMP_PARALLEL:
19912 cp_parser_already_scoped_statement (parser);
19913 par_clause = clauses;
19916 case PRAGMA_OMP_PARALLEL_FOR:
19917 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
19918 stmt = cp_parser_omp_for_loop (parser);
19920 OMP_FOR_CLAUSES (stmt) = ws_clause;
19923 case PRAGMA_OMP_PARALLEL_SECTIONS:
19924 c_split_parallel_clauses (clauses, &par_clause, &ws_clause);
19925 stmt = cp_parser_omp_sections_scope (parser);
19927 OMP_SECTIONS_CLAUSES (stmt) = ws_clause;
19931 gcc_unreachable ();
19934 cp_parser_end_omp_structured_block (parser, save);
19935 stmt = finish_omp_parallel (par_clause, block);
19936 if (p_kind != PRAGMA_OMP_PARALLEL)
19937 OMP_PARALLEL_COMBINED (stmt) = 1;
19942 # pragma omp single single-clause[optseq] new-line
19943 structured-block */
19945 #define OMP_SINGLE_CLAUSE_MASK \
19946 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
19947 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
19948 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
19949 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
19952 cp_parser_omp_single (cp_parser *parser, cp_token *pragma_tok)
19954 tree stmt = make_node (OMP_SINGLE);
19955 TREE_TYPE (stmt) = void_type_node;
19957 OMP_SINGLE_CLAUSES (stmt)
19958 = cp_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK,
19959 "#pragma omp single", pragma_tok);
19960 OMP_SINGLE_BODY (stmt) = cp_parser_omp_structured_block (parser);
19962 return add_stmt (stmt);
19966 # pragma omp threadprivate (variable-list) */
19969 cp_parser_omp_threadprivate (cp_parser *parser, cp_token *pragma_tok)
19973 vars = cp_parser_omp_var_list (parser, 0, NULL);
19974 cp_parser_require_pragma_eol (parser, pragma_tok);
19976 finish_omp_threadprivate (vars);
19979 /* Main entry point to OpenMP statement pragmas. */
19982 cp_parser_omp_construct (cp_parser *parser, cp_token *pragma_tok)
19986 switch (pragma_tok->pragma_kind)
19988 case PRAGMA_OMP_ATOMIC:
19989 cp_parser_omp_atomic (parser, pragma_tok);
19991 case PRAGMA_OMP_CRITICAL:
19992 stmt = cp_parser_omp_critical (parser, pragma_tok);
19994 case PRAGMA_OMP_FOR:
19995 stmt = cp_parser_omp_for (parser, pragma_tok);
19997 case PRAGMA_OMP_MASTER:
19998 stmt = cp_parser_omp_master (parser, pragma_tok);
20000 case PRAGMA_OMP_ORDERED:
20001 stmt = cp_parser_omp_ordered (parser, pragma_tok);
20003 case PRAGMA_OMP_PARALLEL:
20004 stmt = cp_parser_omp_parallel (parser, pragma_tok);
20006 case PRAGMA_OMP_SECTIONS:
20007 stmt = cp_parser_omp_sections (parser, pragma_tok);
20009 case PRAGMA_OMP_SINGLE:
20010 stmt = cp_parser_omp_single (parser, pragma_tok);
20013 gcc_unreachable ();
20017 SET_EXPR_LOCATION (stmt, pragma_tok->location);
20022 static GTY (()) cp_parser *the_parser;
20025 /* Special handling for the first token or line in the file. The first
20026 thing in the file might be #pragma GCC pch_preprocess, which loads a
20027 PCH file, which is a GC collection point. So we need to handle this
20028 first pragma without benefit of an existing lexer structure.
20030 Always returns one token to the caller in *FIRST_TOKEN. This is
20031 either the true first token of the file, or the first token after
20032 the initial pragma. */
20035 cp_parser_initial_pragma (cp_token *first_token)
20039 cp_lexer_get_preprocessor_token (NULL, first_token);
20040 if (first_token->pragma_kind != PRAGMA_GCC_PCH_PREPROCESS)
20043 cp_lexer_get_preprocessor_token (NULL, first_token);
20044 if (first_token->type == CPP_STRING)
20046 name = first_token->u.value;
20048 cp_lexer_get_preprocessor_token (NULL, first_token);
20049 if (first_token->type != CPP_PRAGMA_EOL)
20050 error ("junk at end of %<#pragma GCC pch_preprocess%>");
20053 error ("expected string literal");
20055 /* Skip to the end of the pragma. */
20056 while (first_token->type != CPP_PRAGMA_EOL && first_token->type != CPP_EOF)
20057 cp_lexer_get_preprocessor_token (NULL, first_token);
20059 /* Now actually load the PCH file. */
20061 c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name));
20063 /* Read one more token to return to our caller. We have to do this
20064 after reading the PCH file in, since its pointers have to be
20066 cp_lexer_get_preprocessor_token (NULL, first_token);
20069 /* Normal parsing of a pragma token. Here we can (and must) use the
20073 cp_parser_pragma (cp_parser *parser, enum pragma_context context)
20075 cp_token *pragma_tok;
20078 pragma_tok = cp_lexer_consume_token (parser->lexer);
20079 gcc_assert (pragma_tok->type == CPP_PRAGMA);
20080 parser->lexer->in_pragma = true;
20082 id = pragma_tok->pragma_kind;
20085 case PRAGMA_GCC_PCH_PREPROCESS:
20086 error ("%<#pragma GCC pch_preprocess%> must be first");
20089 case PRAGMA_OMP_BARRIER:
20092 case pragma_compound:
20093 cp_parser_omp_barrier (parser, pragma_tok);
20096 error ("%<#pragma omp barrier%> may only be "
20097 "used in compound statements");
20104 case PRAGMA_OMP_FLUSH:
20107 case pragma_compound:
20108 cp_parser_omp_flush (parser, pragma_tok);
20111 error ("%<#pragma omp flush%> may only be "
20112 "used in compound statements");
20119 case PRAGMA_OMP_THREADPRIVATE:
20120 cp_parser_omp_threadprivate (parser, pragma_tok);
20123 case PRAGMA_OMP_ATOMIC:
20124 case PRAGMA_OMP_CRITICAL:
20125 case PRAGMA_OMP_FOR:
20126 case PRAGMA_OMP_MASTER:
20127 case PRAGMA_OMP_ORDERED:
20128 case PRAGMA_OMP_PARALLEL:
20129 case PRAGMA_OMP_SECTIONS:
20130 case PRAGMA_OMP_SINGLE:
20131 if (context == pragma_external)
20133 cp_parser_omp_construct (parser, pragma_tok);
20136 case PRAGMA_OMP_SECTION:
20137 error ("%<#pragma omp section%> may only be used in "
20138 "%<#pragma omp sections%> construct");
20142 gcc_assert (id >= PRAGMA_FIRST_EXTERNAL);
20143 c_invoke_pragma_handler (id);
20147 cp_parser_error (parser, "expected declaration specifiers");
20151 cp_parser_skip_to_pragma_eol (parser, pragma_tok);
20155 /* The interface the pragma parsers have to the lexer. */
20158 pragma_lex (tree *value)
20161 enum cpp_ttype ret;
20163 tok = cp_lexer_peek_token (the_parser->lexer);
20166 *value = tok->u.value;
20168 if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF)
20170 else if (ret == CPP_STRING)
20171 *value = cp_parser_string_literal (the_parser, false, false);
20174 cp_lexer_consume_token (the_parser->lexer);
20175 if (ret == CPP_KEYWORD)
20183 /* External interface. */
20185 /* Parse one entire translation unit. */
20188 c_parse_file (void)
20190 bool error_occurred;
20191 static bool already_called = false;
20193 if (already_called)
20195 sorry ("inter-module optimizations not implemented for C++");
20198 already_called = true;
20200 the_parser = cp_parser_new ();
20201 push_deferring_access_checks (flag_access_control
20202 ? dk_no_deferred : dk_no_check);
20203 error_occurred = cp_parser_translation_unit (the_parser);
20207 #include "gt-cp-parser.h"