2 Copyright (C) 2000, 2001, 2002, 2003, 2004,
3 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
4 Written by Mark Mitchell <mark@codesourcery.com>.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
30 #include "c-family/c-pragma.h"
33 #include "diagnostic-core.h"
37 #include "c-family/c-common.h"
38 #include "c-family/c-objc.h"
44 /* The cp_lexer_* routines mediate between the lexer proper (in libcpp
45 and c-lex.c) and the C++ parser. */
47 /* A token's value and its associated deferred access checks and
50 struct GTY(()) tree_check
{
51 /* The value associated with the token. */
53 /* The checks that have been associated with value. */
54 VEC (deferred_access_check
, gc
)* checks
;
55 /* The token's qualifying scope (used when it is a
56 CPP_NESTED_NAME_SPECIFIER). */
57 tree qualifying_scope
;
62 typedef struct GTY (()) cp_token
{
63 /* The kind of token. */
64 ENUM_BITFIELD (cpp_ttype
) type
: 8;
65 /* If this token is a keyword, this value indicates which keyword.
66 Otherwise, this value is RID_MAX. */
67 ENUM_BITFIELD (rid
) keyword
: 8;
70 /* Identifier for the pragma. */
71 ENUM_BITFIELD (pragma_kind
) pragma_kind
: 6;
72 /* True if this token is from a context where it is implicitly extern "C" */
73 BOOL_BITFIELD implicit_extern_c
: 1;
74 /* True for a CPP_NAME token that is not a keyword (i.e., for which
75 KEYWORD is RID_MAX) iff this name was looked up and found to be
76 ambiguous. An error has already been reported. */
77 BOOL_BITFIELD ambiguous_p
: 1;
78 /* The location at which this token was found. */
80 /* The value associated with this token, if any. */
81 union cp_token_value
{
82 /* Used for CPP_NESTED_NAME_SPECIFIER and CPP_TEMPLATE_ID. */
83 struct tree_check
* GTY((tag ("1"))) tree_check_value
;
84 /* Use for all other tokens. */
85 tree
GTY((tag ("0"))) value
;
86 } GTY((desc ("(%1.type == CPP_TEMPLATE_ID) || (%1.type == CPP_NESTED_NAME_SPECIFIER)"))) u
;
89 /* We use a stack of token pointer for saving token sets. */
90 typedef struct cp_token
*cp_token_position
;
91 DEF_VEC_P (cp_token_position
);
92 DEF_VEC_ALLOC_P (cp_token_position
,heap
);
94 static cp_token eof_token
=
96 CPP_EOF
, RID_MAX
, 0, PRAGMA_NONE
, false, 0, 0, { NULL
}
99 /* The cp_lexer structure represents the C++ lexer. It is responsible
100 for managing the token stream from the preprocessor and supplying
101 it to the parser. Tokens are never added to the cp_lexer after
104 typedef struct GTY (()) cp_lexer
{
105 /* The memory allocated for the buffer. NULL if this lexer does not
106 own the token buffer. */
107 cp_token
* GTY ((length ("%h.buffer_length"))) buffer
;
108 /* If the lexer owns the buffer, this is the number of tokens in the
110 size_t buffer_length
;
112 /* A pointer just past the last available token. The tokens
113 in this lexer are [buffer, last_token). */
114 cp_token_position
GTY ((skip
)) last_token
;
116 /* The next available token. If NEXT_TOKEN is &eof_token, then there are
117 no more available tokens. */
118 cp_token_position
GTY ((skip
)) next_token
;
120 /* A stack indicating positions at which cp_lexer_save_tokens was
121 called. The top entry is the most recent position at which we
122 began saving tokens. If the stack is non-empty, we are saving
124 VEC(cp_token_position
,heap
) *GTY ((skip
)) saved_tokens
;
126 /* The next lexer in a linked list of lexers. */
127 struct cp_lexer
*next
;
129 /* True if we should output debugging information. */
132 /* True if we're in the context of parsing a pragma, and should not
133 increment past the end-of-line marker. */
137 /* cp_token_cache is a range of tokens. There is no need to represent
138 allocate heap memory for it, since tokens are never removed from the
139 lexer's array. There is also no need for the GC to walk through
140 a cp_token_cache, since everything in here is referenced through
143 typedef struct GTY(()) cp_token_cache
{
144 /* The beginning of the token range. */
145 cp_token
* GTY((skip
)) first
;
147 /* Points immediately after the last token in the range. */
148 cp_token
* GTY ((skip
)) last
;
151 /* The various kinds of non integral constant we encounter. */
152 typedef enum non_integral_constant
{
154 /* floating-point literal */
158 /* %<__FUNCTION__%> */
160 /* %<__PRETTY_FUNCTION__%> */
168 /* %<typeid%> operator */
170 /* non-constant compound literals */
172 /* a function call */
178 /* an array reference */
184 /* the address of a label */
198 /* calls to overloaded operators */
202 /* a comma operator */
204 /* a call to a constructor */
206 } non_integral_constant
;
208 /* The various kinds of errors about name-lookup failing. */
209 typedef enum name_lookup_error
{
214 /* is not a class or namespace */
216 /* is not a class, namespace, or enumeration */
220 /* The various kinds of required token */
221 typedef enum required_token
{
223 RT_SEMICOLON
, /* ';' */
224 RT_OPEN_PAREN
, /* '(' */
225 RT_CLOSE_BRACE
, /* '}' */
226 RT_OPEN_BRACE
, /* '{' */
227 RT_CLOSE_SQUARE
, /* ']' */
228 RT_OPEN_SQUARE
, /* '[' */
232 RT_GREATER
, /* '>' */
234 RT_ELLIPSIS
, /* '...' */
238 RT_COLON_SCOPE
, /* ':' or '::' */
239 RT_CLOSE_PAREN
, /* ')' */
240 RT_COMMA_CLOSE_PAREN
, /* ',' or ')' */
241 RT_PRAGMA_EOL
, /* end of line */
242 RT_NAME
, /* identifier */
244 /* The type is CPP_KEYWORD */
246 RT_DELETE
, /* delete */
247 RT_RETURN
, /* return */
248 RT_WHILE
, /* while */
249 RT_EXTERN
, /* extern */
250 RT_STATIC_ASSERT
, /* static_assert */
251 RT_DECLTYPE
, /* decltype */
252 RT_OPERATOR
, /* operator */
253 RT_CLASS
, /* class */
254 RT_TEMPLATE
, /* template */
255 RT_NAMESPACE
, /* namespace */
256 RT_USING
, /* using */
259 RT_CATCH
, /* catch */
260 RT_THROW
, /* throw */
261 RT_LABEL
, /* __label__ */
262 RT_AT_TRY
, /* @try */
263 RT_AT_SYNCHRONIZED
, /* @synchronized */
264 RT_AT_THROW
, /* @throw */
266 RT_SELECT
, /* selection-statement */
267 RT_INTERATION
, /* iteration-statement */
268 RT_JUMP
, /* jump-statement */
269 RT_CLASS_KEY
, /* class-key */
270 RT_CLASS_TYPENAME_TEMPLATE
/* class, typename, or template */
275 static cp_lexer
*cp_lexer_new_main
277 static cp_lexer
*cp_lexer_new_from_tokens
278 (cp_token_cache
*tokens
);
279 static void cp_lexer_destroy
281 static int cp_lexer_saving_tokens
283 static cp_token_position cp_lexer_token_position
285 static cp_token
*cp_lexer_token_at
286 (cp_lexer
*, cp_token_position
);
287 static void cp_lexer_get_preprocessor_token
288 (cp_lexer
*, cp_token
*);
289 static inline cp_token
*cp_lexer_peek_token
291 static cp_token
*cp_lexer_peek_nth_token
292 (cp_lexer
*, size_t);
293 static inline bool cp_lexer_next_token_is
294 (cp_lexer
*, enum cpp_ttype
);
295 static bool cp_lexer_next_token_is_not
296 (cp_lexer
*, enum cpp_ttype
);
297 static bool cp_lexer_next_token_is_keyword
298 (cp_lexer
*, enum rid
);
299 static cp_token
*cp_lexer_consume_token
301 static void cp_lexer_purge_token
303 static void cp_lexer_purge_tokens_after
304 (cp_lexer
*, cp_token_position
);
305 static void cp_lexer_save_tokens
307 static void cp_lexer_commit_tokens
309 static void cp_lexer_rollback_tokens
311 #ifdef ENABLE_CHECKING
312 static void cp_lexer_print_token
313 (FILE *, cp_token
*);
314 static inline bool cp_lexer_debugging_p
316 static void cp_lexer_start_debugging
317 (cp_lexer
*) ATTRIBUTE_UNUSED
;
318 static void cp_lexer_stop_debugging
319 (cp_lexer
*) ATTRIBUTE_UNUSED
;
321 /* If we define cp_lexer_debug_stream to NULL it will provoke warnings
322 about passing NULL to functions that require non-NULL arguments
323 (fputs, fprintf). It will never be used, so all we need is a value
324 of the right type that's guaranteed not to be NULL. */
325 #define cp_lexer_debug_stream stdout
326 #define cp_lexer_print_token(str, tok) (void) 0
327 #define cp_lexer_debugging_p(lexer) 0
328 #endif /* ENABLE_CHECKING */
330 static cp_token_cache
*cp_token_cache_new
331 (cp_token
*, cp_token
*);
333 static void cp_parser_initial_pragma
336 /* Manifest constants. */
337 #define CP_LEXER_BUFFER_SIZE ((256 * 1024) / sizeof (cp_token))
338 #define CP_SAVED_TOKEN_STACK 5
340 /* A token type for keywords, as opposed to ordinary identifiers. */
341 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
343 /* A token type for template-ids. If a template-id is processed while
344 parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
345 the value of the CPP_TEMPLATE_ID is whatever was returned by
346 cp_parser_template_id. */
347 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
349 /* A token type for nested-name-specifiers. If a
350 nested-name-specifier is processed while parsing tentatively, it is
351 replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
352 CPP_NESTED_NAME_SPECIFIER is whatever was returned by
353 cp_parser_nested_name_specifier_opt. */
354 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
356 /* A token type for tokens that are not tokens at all; these are used
357 to represent slots in the array where there used to be a token
358 that has now been deleted. */
359 #define CPP_PURGED ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
361 /* The number of token types, including C++-specific ones. */
362 #define N_CP_TTYPES ((int) (CPP_PURGED + 1))
366 #ifdef ENABLE_CHECKING
367 /* The stream to which debugging output should be written. */
368 static FILE *cp_lexer_debug_stream
;
369 #endif /* ENABLE_CHECKING */
371 /* Nonzero if we are parsing an unevaluated operand: an operand to
372 sizeof, typeof, or alignof. */
373 int cp_unevaluated_operand
;
375 /* Create a new main C++ lexer, the lexer that gets tokens from the
379 cp_lexer_new_main (void)
381 cp_token first_token
;
388 /* It's possible that parsing the first pragma will load a PCH file,
389 which is a GC collection point. So we have to do that before
390 allocating any memory. */
391 cp_parser_initial_pragma (&first_token
);
393 c_common_no_more_pch ();
395 /* Allocate the memory. */
396 lexer
= ggc_alloc_cleared_cp_lexer ();
398 #ifdef ENABLE_CHECKING
399 /* Initially we are not debugging. */
400 lexer
->debugging_p
= false;
401 #endif /* ENABLE_CHECKING */
402 lexer
->saved_tokens
= VEC_alloc (cp_token_position
, heap
,
403 CP_SAVED_TOKEN_STACK
);
405 /* Create the buffer. */
406 alloc
= CP_LEXER_BUFFER_SIZE
;
407 buffer
= ggc_alloc_vec_cp_token (alloc
);
409 /* Put the first token in the buffer. */
414 /* Get the remaining tokens from the preprocessor. */
415 while (pos
->type
!= CPP_EOF
)
422 buffer
= GGC_RESIZEVEC (cp_token
, buffer
, alloc
);
423 pos
= buffer
+ space
;
425 cp_lexer_get_preprocessor_token (lexer
, pos
);
427 lexer
->buffer
= buffer
;
428 lexer
->buffer_length
= alloc
- space
;
429 lexer
->last_token
= pos
;
430 lexer
->next_token
= lexer
->buffer_length
? buffer
: &eof_token
;
432 /* Subsequent preprocessor diagnostics should use compiler
433 diagnostic functions to get the compiler source location. */
436 gcc_assert (lexer
->next_token
->type
!= CPP_PURGED
);
440 /* Create a new lexer whose token stream is primed with the tokens in
441 CACHE. When these tokens are exhausted, no new tokens will be read. */
444 cp_lexer_new_from_tokens (cp_token_cache
*cache
)
446 cp_token
*first
= cache
->first
;
447 cp_token
*last
= cache
->last
;
448 cp_lexer
*lexer
= ggc_alloc_cleared_cp_lexer ();
450 /* We do not own the buffer. */
451 lexer
->buffer
= NULL
;
452 lexer
->buffer_length
= 0;
453 lexer
->next_token
= first
== last
? &eof_token
: first
;
454 lexer
->last_token
= last
;
456 lexer
->saved_tokens
= VEC_alloc (cp_token_position
, heap
,
457 CP_SAVED_TOKEN_STACK
);
459 #ifdef ENABLE_CHECKING
460 /* Initially we are not debugging. */
461 lexer
->debugging_p
= false;
464 gcc_assert (lexer
->next_token
->type
!= CPP_PURGED
);
468 /* Frees all resources associated with LEXER. */
471 cp_lexer_destroy (cp_lexer
*lexer
)
474 ggc_free (lexer
->buffer
);
475 VEC_free (cp_token_position
, heap
, lexer
->saved_tokens
);
479 /* Returns nonzero if debugging information should be output. */
481 #ifdef ENABLE_CHECKING
484 cp_lexer_debugging_p (cp_lexer
*lexer
)
486 return lexer
->debugging_p
;
489 #endif /* ENABLE_CHECKING */
491 static inline cp_token_position
492 cp_lexer_token_position (cp_lexer
*lexer
, bool previous_p
)
494 gcc_assert (!previous_p
|| lexer
->next_token
!= &eof_token
);
496 return lexer
->next_token
- previous_p
;
499 static inline cp_token
*
500 cp_lexer_token_at (cp_lexer
*lexer ATTRIBUTE_UNUSED
, cp_token_position pos
)
506 cp_lexer_set_token_position (cp_lexer
*lexer
, cp_token_position pos
)
508 lexer
->next_token
= cp_lexer_token_at (lexer
, pos
);
511 static inline cp_token_position
512 cp_lexer_previous_token_position (cp_lexer
*lexer
)
514 if (lexer
->next_token
== &eof_token
)
515 return lexer
->last_token
- 1;
517 return cp_lexer_token_position (lexer
, true);
520 static inline cp_token
*
521 cp_lexer_previous_token (cp_lexer
*lexer
)
523 cp_token_position tp
= cp_lexer_previous_token_position (lexer
);
525 return cp_lexer_token_at (lexer
, tp
);
528 /* nonzero if we are presently saving tokens. */
531 cp_lexer_saving_tokens (const cp_lexer
* lexer
)
533 return VEC_length (cp_token_position
, lexer
->saved_tokens
) != 0;
536 /* Store the next token from the preprocessor in *TOKEN. Return true
537 if we reach EOF. If LEXER is NULL, assume we are handling an
538 initial #pragma pch_preprocess, and thus want the lexer to return
539 processed strings. */
542 cp_lexer_get_preprocessor_token (cp_lexer
*lexer
, cp_token
*token
)
544 static int is_extern_c
= 0;
546 /* Get a new token from the preprocessor. */
548 = c_lex_with_flags (&token
->u
.value
, &token
->location
, &token
->flags
,
549 lexer
== NULL
? 0 : C_LEX_STRING_NO_JOIN
);
550 token
->keyword
= RID_MAX
;
551 token
->pragma_kind
= PRAGMA_NONE
;
553 /* On some systems, some header files are surrounded by an
554 implicit extern "C" block. Set a flag in the token if it
555 comes from such a header. */
556 is_extern_c
+= pending_lang_change
;
557 pending_lang_change
= 0;
558 token
->implicit_extern_c
= is_extern_c
> 0;
560 /* Check to see if this token is a keyword. */
561 if (token
->type
== CPP_NAME
)
563 if (C_IS_RESERVED_WORD (token
->u
.value
))
565 /* Mark this token as a keyword. */
566 token
->type
= CPP_KEYWORD
;
567 /* Record which keyword. */
568 token
->keyword
= C_RID_CODE (token
->u
.value
);
572 if (warn_cxx0x_compat
573 && C_RID_CODE (token
->u
.value
) >= RID_FIRST_CXX0X
574 && C_RID_CODE (token
->u
.value
) <= RID_LAST_CXX0X
)
576 /* Warn about the C++0x keyword (but still treat it as
578 warning (OPT_Wc__0x_compat
,
579 "identifier %qE will become a keyword in C++0x",
582 /* Clear out the C_RID_CODE so we don't warn about this
583 particular identifier-turned-keyword again. */
584 C_SET_RID_CODE (token
->u
.value
, RID_MAX
);
587 token
->ambiguous_p
= false;
588 token
->keyword
= RID_MAX
;
591 else if (token
->type
== CPP_AT_NAME
)
593 /* This only happens in Objective-C++; it must be a keyword. */
594 token
->type
= CPP_KEYWORD
;
595 switch (C_RID_CODE (token
->u
.value
))
597 /* Replace 'class' with '@class', 'private' with '@private',
598 etc. This prevents confusion with the C++ keyword
599 'class', and makes the tokens consistent with other
600 Objective-C 'AT' keywords. For example '@class' is
601 reported as RID_AT_CLASS which is consistent with
602 '@synchronized', which is reported as
605 case RID_CLASS
: token
->keyword
= RID_AT_CLASS
; break;
606 case RID_PRIVATE
: token
->keyword
= RID_AT_PRIVATE
; break;
607 case RID_PROTECTED
: token
->keyword
= RID_AT_PROTECTED
; break;
608 case RID_PUBLIC
: token
->keyword
= RID_AT_PUBLIC
; break;
609 case RID_THROW
: token
->keyword
= RID_AT_THROW
; break;
610 case RID_TRY
: token
->keyword
= RID_AT_TRY
; break;
611 case RID_CATCH
: token
->keyword
= RID_AT_CATCH
; break;
612 default: token
->keyword
= C_RID_CODE (token
->u
.value
);
615 else if (token
->type
== CPP_PRAGMA
)
617 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
618 token
->pragma_kind
= ((enum pragma_kind
)
619 TREE_INT_CST_LOW (token
->u
.value
));
620 token
->u
.value
= NULL_TREE
;
624 /* Update the globals input_location and the input file stack from TOKEN. */
626 cp_lexer_set_source_position_from_token (cp_token
*token
)
628 if (token
->type
!= CPP_EOF
)
630 input_location
= token
->location
;
634 /* Return a pointer to the next token in the token stream, but do not
637 static inline cp_token
*
638 cp_lexer_peek_token (cp_lexer
*lexer
)
640 if (cp_lexer_debugging_p (lexer
))
642 fputs ("cp_lexer: peeking at token: ", cp_lexer_debug_stream
);
643 cp_lexer_print_token (cp_lexer_debug_stream
, lexer
->next_token
);
644 putc ('\n', cp_lexer_debug_stream
);
646 return lexer
->next_token
;
649 /* Return true if the next token has the indicated TYPE. */
652 cp_lexer_next_token_is (cp_lexer
* lexer
, enum cpp_ttype type
)
654 return cp_lexer_peek_token (lexer
)->type
== type
;
657 /* Return true if the next token does not have the indicated TYPE. */
660 cp_lexer_next_token_is_not (cp_lexer
* lexer
, enum cpp_ttype type
)
662 return !cp_lexer_next_token_is (lexer
, type
);
665 /* Return true if the next token is the indicated KEYWORD. */
668 cp_lexer_next_token_is_keyword (cp_lexer
* lexer
, enum rid keyword
)
670 return cp_lexer_peek_token (lexer
)->keyword
== keyword
;
673 /* Return true if the next token is not the indicated KEYWORD. */
676 cp_lexer_next_token_is_not_keyword (cp_lexer
* lexer
, enum rid keyword
)
678 return cp_lexer_peek_token (lexer
)->keyword
!= keyword
;
681 /* Return true if the next token is a keyword for a decl-specifier. */
684 cp_lexer_next_token_is_decl_specifier_keyword (cp_lexer
*lexer
)
688 token
= cp_lexer_peek_token (lexer
);
689 switch (token
->keyword
)
691 /* auto specifier: storage-class-specifier in C++,
692 simple-type-specifier in C++0x. */
694 /* Storage classes. */
700 /* Elaborated type specifiers. */
706 /* Simple type specifiers. */
721 /* GNU extensions. */
724 /* C++0x extensions. */
733 /* Return a pointer to the Nth token in the token stream. If N is 1,
734 then this is precisely equivalent to cp_lexer_peek_token (except
735 that it is not inline). One would like to disallow that case, but
736 there is one case (cp_parser_nth_token_starts_template_id) where
737 the caller passes a variable for N and it might be 1. */
740 cp_lexer_peek_nth_token (cp_lexer
* lexer
, size_t n
)
744 /* N is 1-based, not zero-based. */
747 if (cp_lexer_debugging_p (lexer
))
748 fprintf (cp_lexer_debug_stream
,
749 "cp_lexer: peeking ahead %ld at token: ", (long)n
);
752 token
= lexer
->next_token
;
753 gcc_assert (!n
|| token
!= &eof_token
);
757 if (token
== lexer
->last_token
)
763 if (token
->type
!= CPP_PURGED
)
767 if (cp_lexer_debugging_p (lexer
))
769 cp_lexer_print_token (cp_lexer_debug_stream
, token
);
770 putc ('\n', cp_lexer_debug_stream
);
776 /* Return the next token, and advance the lexer's next_token pointer
777 to point to the next non-purged token. */
780 cp_lexer_consume_token (cp_lexer
* lexer
)
782 cp_token
*token
= lexer
->next_token
;
784 gcc_assert (token
!= &eof_token
);
785 gcc_assert (!lexer
->in_pragma
|| token
->type
!= CPP_PRAGMA_EOL
);
790 if (lexer
->next_token
== lexer
->last_token
)
792 lexer
->next_token
= &eof_token
;
797 while (lexer
->next_token
->type
== CPP_PURGED
);
799 cp_lexer_set_source_position_from_token (token
);
801 /* Provide debugging output. */
802 if (cp_lexer_debugging_p (lexer
))
804 fputs ("cp_lexer: consuming token: ", cp_lexer_debug_stream
);
805 cp_lexer_print_token (cp_lexer_debug_stream
, token
);
806 putc ('\n', cp_lexer_debug_stream
);
812 /* Permanently remove the next token from the token stream, and
813 advance the next_token pointer to refer to the next non-purged
817 cp_lexer_purge_token (cp_lexer
*lexer
)
819 cp_token
*tok
= lexer
->next_token
;
821 gcc_assert (tok
!= &eof_token
);
822 tok
->type
= CPP_PURGED
;
823 tok
->location
= UNKNOWN_LOCATION
;
824 tok
->u
.value
= NULL_TREE
;
825 tok
->keyword
= RID_MAX
;
830 if (tok
== lexer
->last_token
)
836 while (tok
->type
== CPP_PURGED
);
837 lexer
->next_token
= tok
;
840 /* Permanently remove all tokens after TOK, up to, but not
841 including, the token that will be returned next by
842 cp_lexer_peek_token. */
845 cp_lexer_purge_tokens_after (cp_lexer
*lexer
, cp_token
*tok
)
847 cp_token
*peek
= lexer
->next_token
;
849 if (peek
== &eof_token
)
850 peek
= lexer
->last_token
;
852 gcc_assert (tok
< peek
);
854 for ( tok
+= 1; tok
!= peek
; tok
+= 1)
856 tok
->type
= CPP_PURGED
;
857 tok
->location
= UNKNOWN_LOCATION
;
858 tok
->u
.value
= NULL_TREE
;
859 tok
->keyword
= RID_MAX
;
863 /* Begin saving tokens. All tokens consumed after this point will be
867 cp_lexer_save_tokens (cp_lexer
* lexer
)
869 /* Provide debugging output. */
870 if (cp_lexer_debugging_p (lexer
))
871 fprintf (cp_lexer_debug_stream
, "cp_lexer: saving tokens\n");
873 VEC_safe_push (cp_token_position
, heap
,
874 lexer
->saved_tokens
, lexer
->next_token
);
877 /* Commit to the portion of the token stream most recently saved. */
880 cp_lexer_commit_tokens (cp_lexer
* lexer
)
882 /* Provide debugging output. */
883 if (cp_lexer_debugging_p (lexer
))
884 fprintf (cp_lexer_debug_stream
, "cp_lexer: committing tokens\n");
886 VEC_pop (cp_token_position
, lexer
->saved_tokens
);
889 /* Return all tokens saved since the last call to cp_lexer_save_tokens
890 to the token stream. Stop saving tokens. */
893 cp_lexer_rollback_tokens (cp_lexer
* lexer
)
895 /* Provide debugging output. */
896 if (cp_lexer_debugging_p (lexer
))
897 fprintf (cp_lexer_debug_stream
, "cp_lexer: restoring tokens\n");
899 lexer
->next_token
= VEC_pop (cp_token_position
, lexer
->saved_tokens
);
902 /* Print a representation of the TOKEN on the STREAM. */
904 #ifdef ENABLE_CHECKING
907 cp_lexer_print_token (FILE * stream
, cp_token
*token
)
909 /* We don't use cpp_type2name here because the parser defines
910 a few tokens of its own. */
911 static const char *const token_names
[] = {
912 /* cpplib-defined token types */
918 /* C++ parser token types - see "Manifest constants", above. */
921 "NESTED_NAME_SPECIFIER",
925 /* If we have a name for the token, print it out. Otherwise, we
926 simply give the numeric code. */
927 gcc_assert (token
->type
< ARRAY_SIZE(token_names
));
928 fputs (token_names
[token
->type
], stream
);
930 /* For some tokens, print the associated data. */
934 /* Some keywords have a value that is not an IDENTIFIER_NODE.
935 For example, `struct' is mapped to an INTEGER_CST. */
936 if (TREE_CODE (token
->u
.value
) != IDENTIFIER_NODE
)
938 /* else fall through */
940 fputs (IDENTIFIER_POINTER (token
->u
.value
), stream
);
948 fprintf (stream
, " \"%s\"", TREE_STRING_POINTER (token
->u
.value
));
956 /* Start emitting debugging information. */
959 cp_lexer_start_debugging (cp_lexer
* lexer
)
961 lexer
->debugging_p
= true;
964 /* Stop emitting debugging information. */
967 cp_lexer_stop_debugging (cp_lexer
* lexer
)
969 lexer
->debugging_p
= false;
972 #endif /* ENABLE_CHECKING */
974 /* Create a new cp_token_cache, representing a range of tokens. */
976 static cp_token_cache
*
977 cp_token_cache_new (cp_token
*first
, cp_token
*last
)
979 cp_token_cache
*cache
= ggc_alloc_cp_token_cache ();
980 cache
->first
= first
;
986 /* Decl-specifiers. */
988 /* Set *DECL_SPECS to represent an empty decl-specifier-seq. */
991 clear_decl_specs (cp_decl_specifier_seq
*decl_specs
)
993 memset (decl_specs
, 0, sizeof (cp_decl_specifier_seq
));
998 /* Nothing other than the parser should be creating declarators;
999 declarators are a semi-syntactic representation of C++ entities.
1000 Other parts of the front end that need to create entities (like
1001 VAR_DECLs or FUNCTION_DECLs) should do that directly. */
1003 static cp_declarator
*make_call_declarator
1004 (cp_declarator
*, tree
, cp_cv_quals
, tree
, tree
);
1005 static cp_declarator
*make_array_declarator
1006 (cp_declarator
*, tree
);
1007 static cp_declarator
*make_pointer_declarator
1008 (cp_cv_quals
, cp_declarator
*);
1009 static cp_declarator
*make_reference_declarator
1010 (cp_cv_quals
, cp_declarator
*, bool);
1011 static cp_parameter_declarator
*make_parameter_declarator
1012 (cp_decl_specifier_seq
*, cp_declarator
*, tree
);
1013 static cp_declarator
*make_ptrmem_declarator
1014 (cp_cv_quals
, tree
, cp_declarator
*);
1016 /* An erroneous declarator. */
1017 static cp_declarator
*cp_error_declarator
;
1019 /* The obstack on which declarators and related data structures are
1021 static struct obstack declarator_obstack
;
1023 /* Alloc BYTES from the declarator memory pool. */
1025 static inline void *
1026 alloc_declarator (size_t bytes
)
1028 return obstack_alloc (&declarator_obstack
, bytes
);
1031 /* Allocate a declarator of the indicated KIND. Clear fields that are
1032 common to all declarators. */
1034 static cp_declarator
*
1035 make_declarator (cp_declarator_kind kind
)
1037 cp_declarator
*declarator
;
1039 declarator
= (cp_declarator
*) alloc_declarator (sizeof (cp_declarator
));
1040 declarator
->kind
= kind
;
1041 declarator
->attributes
= NULL_TREE
;
1042 declarator
->declarator
= NULL
;
1043 declarator
->parameter_pack_p
= false;
1044 declarator
->id_loc
= UNKNOWN_LOCATION
;
1049 /* Make a declarator for a generalized identifier. If
1050 QUALIFYING_SCOPE is non-NULL, the identifier is
1051 QUALIFYING_SCOPE::UNQUALIFIED_NAME; otherwise, it is just
1052 UNQUALIFIED_NAME. SFK indicates the kind of special function this
1055 static cp_declarator
*
1056 make_id_declarator (tree qualifying_scope
, tree unqualified_name
,
1057 special_function_kind sfk
)
1059 cp_declarator
*declarator
;
1061 /* It is valid to write:
1063 class C { void f(); };
1067 The standard is not clear about whether `typedef const C D' is
1068 legal; as of 2002-09-15 the committee is considering that
1069 question. EDG 3.0 allows that syntax. Therefore, we do as
1071 if (qualifying_scope
&& TYPE_P (qualifying_scope
))
1072 qualifying_scope
= TYPE_MAIN_VARIANT (qualifying_scope
);
1074 gcc_assert (TREE_CODE (unqualified_name
) == IDENTIFIER_NODE
1075 || TREE_CODE (unqualified_name
) == BIT_NOT_EXPR
1076 || TREE_CODE (unqualified_name
) == TEMPLATE_ID_EXPR
);
1078 declarator
= make_declarator (cdk_id
);
1079 declarator
->u
.id
.qualifying_scope
= qualifying_scope
;
1080 declarator
->u
.id
.unqualified_name
= unqualified_name
;
1081 declarator
->u
.id
.sfk
= sfk
;
1086 /* Make a declarator for a pointer to TARGET. CV_QUALIFIERS is a list
1087 of modifiers such as const or volatile to apply to the pointer
1088 type, represented as identifiers. */
1091 make_pointer_declarator (cp_cv_quals cv_qualifiers
, cp_declarator
*target
)
1093 cp_declarator
*declarator
;
1095 declarator
= make_declarator (cdk_pointer
);
1096 declarator
->declarator
= target
;
1097 declarator
->u
.pointer
.qualifiers
= cv_qualifiers
;
1098 declarator
->u
.pointer
.class_type
= NULL_TREE
;
1101 declarator
->id_loc
= target
->id_loc
;
1102 declarator
->parameter_pack_p
= target
->parameter_pack_p
;
1103 target
->parameter_pack_p
= false;
1106 declarator
->parameter_pack_p
= false;
1111 /* Like make_pointer_declarator -- but for references. */
1114 make_reference_declarator (cp_cv_quals cv_qualifiers
, cp_declarator
*target
,
1117 cp_declarator
*declarator
;
1119 declarator
= make_declarator (cdk_reference
);
1120 declarator
->declarator
= target
;
1121 declarator
->u
.reference
.qualifiers
= cv_qualifiers
;
1122 declarator
->u
.reference
.rvalue_ref
= rvalue_ref
;
1125 declarator
->id_loc
= target
->id_loc
;
1126 declarator
->parameter_pack_p
= target
->parameter_pack_p
;
1127 target
->parameter_pack_p
= false;
1130 declarator
->parameter_pack_p
= false;
1135 /* Like make_pointer_declarator -- but for a pointer to a non-static
1136 member of CLASS_TYPE. */
1139 make_ptrmem_declarator (cp_cv_quals cv_qualifiers
, tree class_type
,
1140 cp_declarator
*pointee
)
1142 cp_declarator
*declarator
;
1144 declarator
= make_declarator (cdk_ptrmem
);
1145 declarator
->declarator
= pointee
;
1146 declarator
->u
.pointer
.qualifiers
= cv_qualifiers
;
1147 declarator
->u
.pointer
.class_type
= class_type
;
1151 declarator
->parameter_pack_p
= pointee
->parameter_pack_p
;
1152 pointee
->parameter_pack_p
= false;
1155 declarator
->parameter_pack_p
= false;
1160 /* Make a declarator for the function given by TARGET, with the
1161 indicated PARMS. The CV_QUALIFIERS aply to the function, as in
1162 "const"-qualified member function. The EXCEPTION_SPECIFICATION
1163 indicates what exceptions can be thrown. */
1166 make_call_declarator (cp_declarator
*target
,
1168 cp_cv_quals cv_qualifiers
,
1169 tree exception_specification
,
1170 tree late_return_type
)
1172 cp_declarator
*declarator
;
1174 declarator
= make_declarator (cdk_function
);
1175 declarator
->declarator
= target
;
1176 declarator
->u
.function
.parameters
= parms
;
1177 declarator
->u
.function
.qualifiers
= cv_qualifiers
;
1178 declarator
->u
.function
.exception_specification
= exception_specification
;
1179 declarator
->u
.function
.late_return_type
= late_return_type
;
1182 declarator
->id_loc
= target
->id_loc
;
1183 declarator
->parameter_pack_p
= target
->parameter_pack_p
;
1184 target
->parameter_pack_p
= false;
1187 declarator
->parameter_pack_p
= false;
1192 /* Make a declarator for an array of BOUNDS elements, each of which is
1193 defined by ELEMENT. */
1196 make_array_declarator (cp_declarator
*element
, tree bounds
)
1198 cp_declarator
*declarator
;
1200 declarator
= make_declarator (cdk_array
);
1201 declarator
->declarator
= element
;
1202 declarator
->u
.array
.bounds
= bounds
;
1205 declarator
->id_loc
= element
->id_loc
;
1206 declarator
->parameter_pack_p
= element
->parameter_pack_p
;
1207 element
->parameter_pack_p
= false;
1210 declarator
->parameter_pack_p
= false;
1215 /* Determine whether the declarator we've seen so far can be a
1216 parameter pack, when followed by an ellipsis. */
1218 declarator_can_be_parameter_pack (cp_declarator
*declarator
)
1220 /* Search for a declarator name, or any other declarator that goes
1221 after the point where the ellipsis could appear in a parameter
1222 pack. If we find any of these, then this declarator can not be
1223 made into a parameter pack. */
1225 while (declarator
&& !found
)
1227 switch ((int)declarator
->kind
)
1238 declarator
= declarator
->declarator
;
1246 cp_parameter_declarator
*no_parameters
;
1248 /* Create a parameter declarator with the indicated DECL_SPECIFIERS,
1249 DECLARATOR and DEFAULT_ARGUMENT. */
1251 cp_parameter_declarator
*
1252 make_parameter_declarator (cp_decl_specifier_seq
*decl_specifiers
,
1253 cp_declarator
*declarator
,
1254 tree default_argument
)
1256 cp_parameter_declarator
*parameter
;
1258 parameter
= ((cp_parameter_declarator
*)
1259 alloc_declarator (sizeof (cp_parameter_declarator
)));
1260 parameter
->next
= NULL
;
1261 if (decl_specifiers
)
1262 parameter
->decl_specifiers
= *decl_specifiers
;
1264 clear_decl_specs (¶meter
->decl_specifiers
);
1265 parameter
->declarator
= declarator
;
1266 parameter
->default_argument
= default_argument
;
1267 parameter
->ellipsis_p
= false;
1272 /* Returns true iff DECLARATOR is a declaration for a function. */
1275 function_declarator_p (const cp_declarator
*declarator
)
1279 if (declarator
->kind
== cdk_function
1280 && declarator
->declarator
->kind
== cdk_id
)
1282 if (declarator
->kind
== cdk_id
1283 || declarator
->kind
== cdk_error
)
1285 declarator
= declarator
->declarator
;
1295 A cp_parser parses the token stream as specified by the C++
1296 grammar. Its job is purely parsing, not semantic analysis. For
1297 example, the parser breaks the token stream into declarators,
1298 expressions, statements, and other similar syntactic constructs.
1299 It does not check that the types of the expressions on either side
1300 of an assignment-statement are compatible, or that a function is
1301 not declared with a parameter of type `void'.
1303 The parser invokes routines elsewhere in the compiler to perform
1304 semantic analysis and to build up the abstract syntax tree for the
1307 The parser (and the template instantiation code, which is, in a
1308 way, a close relative of parsing) are the only parts of the
1309 compiler that should be calling push_scope and pop_scope, or
1310 related functions. The parser (and template instantiation code)
1311 keeps track of what scope is presently active; everything else
1312 should simply honor that. (The code that generates static
1313 initializers may also need to set the scope, in order to check
1314 access control correctly when emitting the initializers.)
1319 The parser is of the standard recursive-descent variety. Upcoming
1320 tokens in the token stream are examined in order to determine which
1321 production to use when parsing a non-terminal. Some C++ constructs
1322 require arbitrary look ahead to disambiguate. For example, it is
1323 impossible, in the general case, to tell whether a statement is an
1324 expression or declaration without scanning the entire statement.
1325 Therefore, the parser is capable of "parsing tentatively." When the
1326 parser is not sure what construct comes next, it enters this mode.
1327 Then, while we attempt to parse the construct, the parser queues up
1328 error messages, rather than issuing them immediately, and saves the
1329 tokens it consumes. If the construct is parsed successfully, the
1330 parser "commits", i.e., it issues any queued error messages and
1331 the tokens that were being preserved are permanently discarded.
1332 If, however, the construct is not parsed successfully, the parser
1333 rolls back its state completely so that it can resume parsing using
1334 a different alternative.
1339 The performance of the parser could probably be improved substantially.
1340 We could often eliminate the need to parse tentatively by looking ahead
1341 a little bit. In some places, this approach might not entirely eliminate
1342 the need to parse tentatively, but it might still speed up the average
1345 /* Flags that are passed to some parsing functions. These values can
1346 be bitwise-ored together. */
1351 CP_PARSER_FLAGS_NONE
= 0x0,
1352 /* The construct is optional. If it is not present, then no error
1353 should be issued. */
1354 CP_PARSER_FLAGS_OPTIONAL
= 0x1,
1355 /* When parsing a type-specifier, treat user-defined type-names
1356 as non-type identifiers. */
1357 CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES
= 0x2,
1358 /* When parsing a type-specifier, do not try to parse a class-specifier
1359 or enum-specifier. */
1360 CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS
= 0x4,
1361 /* When parsing a decl-specifier-seq, only allow type-specifier or
1363 CP_PARSER_FLAGS_ONLY_TYPE_OR_CONSTEXPR
= 0x8
1366 /* This type is used for parameters and variables which hold
1367 combinations of the above flags. */
1368 typedef int cp_parser_flags
;
1370 /* The different kinds of declarators we want to parse. */
1372 typedef enum cp_parser_declarator_kind
1374 /* We want an abstract declarator. */
1375 CP_PARSER_DECLARATOR_ABSTRACT
,
1376 /* We want a named declarator. */
1377 CP_PARSER_DECLARATOR_NAMED
,
1378 /* We don't mind, but the name must be an unqualified-id. */
1379 CP_PARSER_DECLARATOR_EITHER
1380 } cp_parser_declarator_kind
;
1382 /* The precedence values used to parse binary expressions. The minimum value
1383 of PREC must be 1, because zero is reserved to quickly discriminate
1384 binary operators from other tokens. */
1389 PREC_LOGICAL_OR_EXPRESSION
,
1390 PREC_LOGICAL_AND_EXPRESSION
,
1391 PREC_INCLUSIVE_OR_EXPRESSION
,
1392 PREC_EXCLUSIVE_OR_EXPRESSION
,
1393 PREC_AND_EXPRESSION
,
1394 PREC_EQUALITY_EXPRESSION
,
1395 PREC_RELATIONAL_EXPRESSION
,
1396 PREC_SHIFT_EXPRESSION
,
1397 PREC_ADDITIVE_EXPRESSION
,
1398 PREC_MULTIPLICATIVE_EXPRESSION
,
1400 NUM_PREC_VALUES
= PREC_PM_EXPRESSION
1403 /* A mapping from a token type to a corresponding tree node type, with a
1404 precedence value. */
1406 typedef struct cp_parser_binary_operations_map_node
1408 /* The token type. */
1409 enum cpp_ttype token_type
;
1410 /* The corresponding tree code. */
1411 enum tree_code tree_type
;
1412 /* The precedence of this operator. */
1413 enum cp_parser_prec prec
;
1414 } cp_parser_binary_operations_map_node
;
1416 /* The status of a tentative parse. */
1418 typedef enum cp_parser_status_kind
1420 /* No errors have occurred. */
1421 CP_PARSER_STATUS_KIND_NO_ERROR
,
1422 /* An error has occurred. */
1423 CP_PARSER_STATUS_KIND_ERROR
,
1424 /* We are committed to this tentative parse, whether or not an error
1426 CP_PARSER_STATUS_KIND_COMMITTED
1427 } cp_parser_status_kind
;
1429 typedef struct cp_parser_expression_stack_entry
1431 /* Left hand side of the binary operation we are currently
1434 /* Original tree code for left hand side, if it was a binary
1435 expression itself (used for -Wparentheses). */
1436 enum tree_code lhs_type
;
1437 /* Tree code for the binary operation we are parsing. */
1438 enum tree_code tree_type
;
1439 /* Precedence of the binary operation we are parsing. */
1440 enum cp_parser_prec prec
;
1441 } cp_parser_expression_stack_entry
;
1443 /* The stack for storing partial expressions. We only need NUM_PREC_VALUES
1444 entries because precedence levels on the stack are monotonically
1446 typedef struct cp_parser_expression_stack_entry
1447 cp_parser_expression_stack
[NUM_PREC_VALUES
];
1449 /* Context that is saved and restored when parsing tentatively. */
1450 typedef struct GTY (()) cp_parser_context
{
1451 /* If this is a tentative parsing context, the status of the
1453 enum cp_parser_status_kind status
;
1454 /* If non-NULL, we have just seen a `x->' or `x.' expression. Names
1455 that are looked up in this context must be looked up both in the
1456 scope given by OBJECT_TYPE (the type of `x' or `*x') and also in
1457 the context of the containing expression. */
1460 /* The next parsing context in the stack. */
1461 struct cp_parser_context
*next
;
1462 } cp_parser_context
;
1466 /* Constructors and destructors. */
1468 static cp_parser_context
*cp_parser_context_new
1469 (cp_parser_context
*);
1471 /* Class variables. */
1473 static GTY((deletable
)) cp_parser_context
* cp_parser_context_free_list
;
1475 /* The operator-precedence table used by cp_parser_binary_expression.
1476 Transformed into an associative array (binops_by_token) by
1479 static const cp_parser_binary_operations_map_node binops
[] = {
1480 { CPP_DEREF_STAR
, MEMBER_REF
, PREC_PM_EXPRESSION
},
1481 { CPP_DOT_STAR
, DOTSTAR_EXPR
, PREC_PM_EXPRESSION
},
1483 { CPP_MULT
, MULT_EXPR
, PREC_MULTIPLICATIVE_EXPRESSION
},
1484 { CPP_DIV
, TRUNC_DIV_EXPR
, PREC_MULTIPLICATIVE_EXPRESSION
},
1485 { CPP_MOD
, TRUNC_MOD_EXPR
, PREC_MULTIPLICATIVE_EXPRESSION
},
1487 { CPP_PLUS
, PLUS_EXPR
, PREC_ADDITIVE_EXPRESSION
},
1488 { CPP_MINUS
, MINUS_EXPR
, PREC_ADDITIVE_EXPRESSION
},
1490 { CPP_LSHIFT
, LSHIFT_EXPR
, PREC_SHIFT_EXPRESSION
},
1491 { CPP_RSHIFT
, RSHIFT_EXPR
, PREC_SHIFT_EXPRESSION
},
1493 { CPP_LESS
, LT_EXPR
, PREC_RELATIONAL_EXPRESSION
},
1494 { CPP_GREATER
, GT_EXPR
, PREC_RELATIONAL_EXPRESSION
},
1495 { CPP_LESS_EQ
, LE_EXPR
, PREC_RELATIONAL_EXPRESSION
},
1496 { CPP_GREATER_EQ
, GE_EXPR
, PREC_RELATIONAL_EXPRESSION
},
1498 { CPP_EQ_EQ
, EQ_EXPR
, PREC_EQUALITY_EXPRESSION
},
1499 { CPP_NOT_EQ
, NE_EXPR
, PREC_EQUALITY_EXPRESSION
},
1501 { CPP_AND
, BIT_AND_EXPR
, PREC_AND_EXPRESSION
},
1503 { CPP_XOR
, BIT_XOR_EXPR
, PREC_EXCLUSIVE_OR_EXPRESSION
},
1505 { CPP_OR
, BIT_IOR_EXPR
, PREC_INCLUSIVE_OR_EXPRESSION
},
1507 { CPP_AND_AND
, TRUTH_ANDIF_EXPR
, PREC_LOGICAL_AND_EXPRESSION
},
1509 { CPP_OR_OR
, TRUTH_ORIF_EXPR
, PREC_LOGICAL_OR_EXPRESSION
}
1512 /* The same as binops, but initialized by cp_parser_new so that
1513 binops_by_token[N].token_type == N. Used in cp_parser_binary_expression
1515 static cp_parser_binary_operations_map_node binops_by_token
[N_CP_TTYPES
];
1517 /* Constructors and destructors. */
1519 /* Construct a new context. The context below this one on the stack
1520 is given by NEXT. */
1522 static cp_parser_context
*
1523 cp_parser_context_new (cp_parser_context
* next
)
1525 cp_parser_context
*context
;
1527 /* Allocate the storage. */
1528 if (cp_parser_context_free_list
!= NULL
)
1530 /* Pull the first entry from the free list. */
1531 context
= cp_parser_context_free_list
;
1532 cp_parser_context_free_list
= context
->next
;
1533 memset (context
, 0, sizeof (*context
));
1536 context
= ggc_alloc_cleared_cp_parser_context ();
1538 /* No errors have occurred yet in this context. */
1539 context
->status
= CP_PARSER_STATUS_KIND_NO_ERROR
;
1540 /* If this is not the bottommost context, copy information that we
1541 need from the previous context. */
1544 /* If, in the NEXT context, we are parsing an `x->' or `x.'
1545 expression, then we are parsing one in this context, too. */
1546 context
->object_type
= next
->object_type
;
1547 /* Thread the stack. */
1548 context
->next
= next
;
1554 /* An entry in a queue of function arguments that require post-processing. */
1556 typedef struct GTY(()) cp_default_arg_entry_d
{
1557 /* The current_class_type when we parsed this arg. */
1560 /* The function decl itself. */
1562 } cp_default_arg_entry
;
1564 DEF_VEC_O(cp_default_arg_entry
);
1565 DEF_VEC_ALLOC_O(cp_default_arg_entry
,gc
);
1567 /* An entry in a stack for member functions of local classes. */
1569 typedef struct GTY(()) cp_unparsed_functions_entry_d
{
1570 /* Functions with default arguments that require post-processing.
1571 Functions appear in this list in declaration order. */
1572 VEC(cp_default_arg_entry
,gc
) *funs_with_default_args
;
1574 /* Functions with defintions that require post-processing. Functions
1575 appear in this list in declaration order. */
1576 VEC(tree
,gc
) *funs_with_definitions
;
1577 } cp_unparsed_functions_entry
;
1579 DEF_VEC_O(cp_unparsed_functions_entry
);
1580 DEF_VEC_ALLOC_O(cp_unparsed_functions_entry
,gc
);
1582 /* The cp_parser structure represents the C++ parser. */
1584 typedef struct GTY(()) cp_parser
{
1585 /* The lexer from which we are obtaining tokens. */
1588 /* The scope in which names should be looked up. If NULL_TREE, then
1589 we look up names in the scope that is currently open in the
1590 source program. If non-NULL, this is either a TYPE or
1591 NAMESPACE_DECL for the scope in which we should look. It can
1592 also be ERROR_MARK, when we've parsed a bogus scope.
1594 This value is not cleared automatically after a name is looked
1595 up, so we must be careful to clear it before starting a new look
1596 up sequence. (If it is not cleared, then `X::Y' followed by `Z'
1597 will look up `Z' in the scope of `X', rather than the current
1598 scope.) Unfortunately, it is difficult to tell when name lookup
1599 is complete, because we sometimes peek at a token, look it up,
1600 and then decide not to consume it. */
1603 /* OBJECT_SCOPE and QUALIFYING_SCOPE give the scopes in which the
1604 last lookup took place. OBJECT_SCOPE is used if an expression
1605 like "x->y" or "x.y" was used; it gives the type of "*x" or "x",
1606 respectively. QUALIFYING_SCOPE is used for an expression of the
1607 form "X::Y"; it refers to X. */
1609 tree qualifying_scope
;
1611 /* A stack of parsing contexts. All but the bottom entry on the
1612 stack will be tentative contexts.
1614 We parse tentatively in order to determine which construct is in
1615 use in some situations. For example, in order to determine
1616 whether a statement is an expression-statement or a
1617 declaration-statement we parse it tentatively as a
1618 declaration-statement. If that fails, we then reparse the same
1619 token stream as an expression-statement. */
1620 cp_parser_context
*context
;
1622 /* True if we are parsing GNU C++. If this flag is not set, then
1623 GNU extensions are not recognized. */
1624 bool allow_gnu_extensions_p
;
1626 /* TRUE if the `>' token should be interpreted as the greater-than
1627 operator. FALSE if it is the end of a template-id or
1628 template-parameter-list. In C++0x mode, this flag also applies to
1629 `>>' tokens, which are viewed as two consecutive `>' tokens when
1630 this flag is FALSE. */
1631 bool greater_than_is_operator_p
;
1633 /* TRUE if default arguments are allowed within a parameter list
1634 that starts at this point. FALSE if only a gnu extension makes
1635 them permissible. */
1636 bool default_arg_ok_p
;
1638 /* TRUE if we are parsing an integral constant-expression. See
1639 [expr.const] for a precise definition. */
1640 bool integral_constant_expression_p
;
1642 /* TRUE if we are parsing an integral constant-expression -- but a
1643 non-constant expression should be permitted as well. This flag
1644 is used when parsing an array bound so that GNU variable-length
1645 arrays are tolerated. */
1646 bool allow_non_integral_constant_expression_p
;
1648 /* TRUE if ALLOW_NON_CONSTANT_EXPRESSION_P is TRUE and something has
1649 been seen that makes the expression non-constant. */
1650 bool non_integral_constant_expression_p
;
1652 /* TRUE if local variable names and `this' are forbidden in the
1654 bool local_variables_forbidden_p
;
1656 /* TRUE if the declaration we are parsing is part of a
1657 linkage-specification of the form `extern string-literal
1659 bool in_unbraced_linkage_specification_p
;
1661 /* TRUE if we are presently parsing a declarator, after the
1662 direct-declarator. */
1663 bool in_declarator_p
;
1665 /* TRUE if we are presently parsing a template-argument-list. */
1666 bool in_template_argument_list_p
;
1668 /* Set to IN_ITERATION_STMT if parsing an iteration-statement,
1669 to IN_OMP_BLOCK if parsing OpenMP structured block and
1670 IN_OMP_FOR if parsing OpenMP loop. If parsing a switch statement,
1671 this is bitwise ORed with IN_SWITCH_STMT, unless parsing an
1672 iteration-statement, OpenMP block or loop within that switch. */
1673 #define IN_SWITCH_STMT 1
1674 #define IN_ITERATION_STMT 2
1675 #define IN_OMP_BLOCK 4
1676 #define IN_OMP_FOR 8
1677 #define IN_IF_STMT 16
1678 unsigned char in_statement
;
1680 /* TRUE if we are presently parsing the body of a switch statement.
1681 Note that this doesn't quite overlap with in_statement above.
1682 The difference relates to giving the right sets of error messages:
1683 "case not in switch" vs "break statement used with OpenMP...". */
1684 bool in_switch_statement_p
;
1686 /* TRUE if we are parsing a type-id in an expression context. In
1687 such a situation, both "type (expr)" and "type (type)" are valid
1689 bool in_type_id_in_expr_p
;
1691 /* TRUE if we are currently in a header file where declarations are
1692 implicitly extern "C". */
1693 bool implicit_extern_c
;
1695 /* TRUE if strings in expressions should be translated to the execution
1697 bool translate_strings_p
;
1699 /* TRUE if we are presently parsing the body of a function, but not
1701 bool in_function_body
;
1703 /* TRUE if we can auto-correct a colon to a scope operator. */
1704 bool colon_corrects_to_scope_p
;
1706 /* If non-NULL, then we are parsing a construct where new type
1707 definitions are not permitted. The string stored here will be
1708 issued as an error message if a type is defined. */
1709 const char *type_definition_forbidden_message
;
1711 /* A stack used for member functions of local classes. The lists
1712 contained in an individual entry can only be processed once the
1713 outermost class being defined is complete. */
1714 VEC(cp_unparsed_functions_entry
,gc
) *unparsed_queues
;
1716 /* The number of classes whose definitions are currently in
1718 unsigned num_classes_being_defined
;
1720 /* The number of template parameter lists that apply directly to the
1721 current declaration. */
1722 unsigned num_template_parameter_lists
;
1725 /* Managing the unparsed function queues. */
1727 #define unparsed_funs_with_default_args \
1728 VEC_last (cp_unparsed_functions_entry, parser->unparsed_queues)->funs_with_default_args
1729 #define unparsed_funs_with_definitions \
1730 VEC_last (cp_unparsed_functions_entry, parser->unparsed_queues)->funs_with_definitions
1733 push_unparsed_function_queues (cp_parser
*parser
)
1735 VEC_safe_push (cp_unparsed_functions_entry
, gc
,
1736 parser
->unparsed_queues
, NULL
);
1737 unparsed_funs_with_default_args
= NULL
;
1738 unparsed_funs_with_definitions
= make_tree_vector ();
1742 pop_unparsed_function_queues (cp_parser
*parser
)
1744 release_tree_vector (unparsed_funs_with_definitions
);
1745 VEC_pop (cp_unparsed_functions_entry
, parser
->unparsed_queues
);
1750 /* Constructors and destructors. */
1752 static cp_parser
*cp_parser_new
1755 /* Routines to parse various constructs.
1757 Those that return `tree' will return the error_mark_node (rather
1758 than NULL_TREE) if a parse error occurs, unless otherwise noted.
1759 Sometimes, they will return an ordinary node if error-recovery was
1760 attempted, even though a parse error occurred. So, to check
1761 whether or not a parse error occurred, you should always use
1762 cp_parser_error_occurred. If the construct is optional (indicated
1763 either by an `_opt' in the name of the function that does the
1764 parsing or via a FLAGS parameter), then NULL_TREE is returned if
1765 the construct is not present. */
1767 /* Lexical conventions [gram.lex] */
1769 static tree cp_parser_identifier
1771 static tree cp_parser_string_literal
1772 (cp_parser
*, bool, bool);
1774 /* Basic concepts [gram.basic] */
1776 static bool cp_parser_translation_unit
1779 /* Expressions [gram.expr] */
1781 static tree cp_parser_primary_expression
1782 (cp_parser
*, bool, bool, bool, cp_id_kind
*);
1783 static tree cp_parser_id_expression
1784 (cp_parser
*, bool, bool, bool *, bool, bool);
1785 static tree cp_parser_unqualified_id
1786 (cp_parser
*, bool, bool, bool, bool);
1787 static tree cp_parser_nested_name_specifier_opt
1788 (cp_parser
*, bool, bool, bool, bool);
1789 static tree cp_parser_nested_name_specifier
1790 (cp_parser
*, bool, bool, bool, bool);
1791 static tree cp_parser_qualifying_entity
1792 (cp_parser
*, bool, bool, bool, bool, bool);
1793 static tree cp_parser_postfix_expression
1794 (cp_parser
*, bool, bool, bool, cp_id_kind
*);
1795 static tree cp_parser_postfix_open_square_expression
1796 (cp_parser
*, tree
, bool);
1797 static tree cp_parser_postfix_dot_deref_expression
1798 (cp_parser
*, enum cpp_ttype
, tree
, bool, cp_id_kind
*, location_t
);
1799 static VEC(tree
,gc
) *cp_parser_parenthesized_expression_list
1800 (cp_parser
*, int, bool, bool, bool *);
1801 /* Values for the second parameter of cp_parser_parenthesized_expression_list. */
1802 enum { non_attr
= 0, normal_attr
= 1, id_attr
= 2 };
1803 static void cp_parser_pseudo_destructor_name
1804 (cp_parser
*, tree
*, tree
*);
1805 static tree cp_parser_unary_expression
1806 (cp_parser
*, bool, bool, cp_id_kind
*);
1807 static enum tree_code cp_parser_unary_operator
1809 static tree cp_parser_new_expression
1811 static VEC(tree
,gc
) *cp_parser_new_placement
1813 static tree cp_parser_new_type_id
1814 (cp_parser
*, tree
*);
1815 static cp_declarator
*cp_parser_new_declarator_opt
1817 static cp_declarator
*cp_parser_direct_new_declarator
1819 static VEC(tree
,gc
) *cp_parser_new_initializer
1821 static tree cp_parser_delete_expression
1823 static tree cp_parser_cast_expression
1824 (cp_parser
*, bool, bool, cp_id_kind
*);
1825 static tree cp_parser_binary_expression
1826 (cp_parser
*, bool, bool, enum cp_parser_prec
, cp_id_kind
*);
1827 static tree cp_parser_question_colon_clause
1828 (cp_parser
*, tree
);
1829 static tree cp_parser_assignment_expression
1830 (cp_parser
*, bool, cp_id_kind
*);
1831 static enum tree_code cp_parser_assignment_operator_opt
1833 static tree cp_parser_expression
1834 (cp_parser
*, bool, cp_id_kind
*);
1835 static tree cp_parser_constant_expression
1836 (cp_parser
*, bool, bool *);
1837 static tree cp_parser_builtin_offsetof
1839 static tree cp_parser_lambda_expression
1841 static void cp_parser_lambda_introducer
1842 (cp_parser
*, tree
);
1843 static void cp_parser_lambda_declarator_opt
1844 (cp_parser
*, tree
);
1845 static void cp_parser_lambda_body
1846 (cp_parser
*, tree
);
1848 /* Statements [gram.stmt.stmt] */
1850 static void cp_parser_statement
1851 (cp_parser
*, tree
, bool, bool *);
1852 static void cp_parser_label_for_labeled_statement
1854 static tree cp_parser_expression_statement
1855 (cp_parser
*, tree
);
1856 static tree cp_parser_compound_statement
1857 (cp_parser
*, tree
, bool);
1858 static void cp_parser_statement_seq_opt
1859 (cp_parser
*, tree
);
1860 static tree cp_parser_selection_statement
1861 (cp_parser
*, bool *);
1862 static tree cp_parser_condition
1864 static tree cp_parser_iteration_statement
1866 static void cp_parser_for_init_statement
1868 static tree cp_parser_c_for
1870 static tree cp_parser_range_for
1872 static tree cp_parser_jump_statement
1874 static void cp_parser_declaration_statement
1877 static tree cp_parser_implicitly_scoped_statement
1878 (cp_parser
*, bool *);
1879 static void cp_parser_already_scoped_statement
1882 /* Declarations [gram.dcl.dcl] */
1884 static void cp_parser_declaration_seq_opt
1886 static void cp_parser_declaration
1888 static void cp_parser_block_declaration
1889 (cp_parser
*, bool);
1890 static void cp_parser_simple_declaration
1891 (cp_parser
*, bool);
1892 static void cp_parser_decl_specifier_seq
1893 (cp_parser
*, cp_parser_flags
, cp_decl_specifier_seq
*, int *);
1894 static tree cp_parser_storage_class_specifier_opt
1896 static tree cp_parser_function_specifier_opt
1897 (cp_parser
*, cp_decl_specifier_seq
*);
1898 static tree cp_parser_type_specifier
1899 (cp_parser
*, cp_parser_flags
, cp_decl_specifier_seq
*, bool,
1901 static tree cp_parser_simple_type_specifier
1902 (cp_parser
*, cp_decl_specifier_seq
*, cp_parser_flags
);
1903 static tree cp_parser_type_name
1905 static tree cp_parser_nonclass_name
1906 (cp_parser
* parser
);
1907 static tree cp_parser_elaborated_type_specifier
1908 (cp_parser
*, bool, bool);
1909 static tree cp_parser_enum_specifier
1911 static void cp_parser_enumerator_list
1912 (cp_parser
*, tree
);
1913 static void cp_parser_enumerator_definition
1914 (cp_parser
*, tree
);
1915 static tree cp_parser_namespace_name
1917 static void cp_parser_namespace_definition
1919 static void cp_parser_namespace_body
1921 static tree cp_parser_qualified_namespace_specifier
1923 static void cp_parser_namespace_alias_definition
1925 static bool cp_parser_using_declaration
1926 (cp_parser
*, bool);
1927 static void cp_parser_using_directive
1929 static void cp_parser_asm_definition
1931 static void cp_parser_linkage_specification
1933 static void cp_parser_static_assert
1934 (cp_parser
*, bool);
1935 static tree cp_parser_decltype
1938 /* Declarators [gram.dcl.decl] */
1940 static tree cp_parser_init_declarator
1941 (cp_parser
*, cp_decl_specifier_seq
*, VEC (deferred_access_check
,gc
)*, bool, bool, int, bool *);
1942 static cp_declarator
*cp_parser_declarator
1943 (cp_parser
*, cp_parser_declarator_kind
, int *, bool *, bool);
1944 static cp_declarator
*cp_parser_direct_declarator
1945 (cp_parser
*, cp_parser_declarator_kind
, int *, bool);
1946 static enum tree_code cp_parser_ptr_operator
1947 (cp_parser
*, tree
*, cp_cv_quals
*);
1948 static cp_cv_quals cp_parser_cv_qualifier_seq_opt
1950 static tree cp_parser_late_return_type_opt
1952 static tree cp_parser_declarator_id
1953 (cp_parser
*, bool);
1954 static tree cp_parser_type_id
1956 static tree cp_parser_template_type_arg
1958 static tree
cp_parser_trailing_type_id (cp_parser
*);
1959 static tree cp_parser_type_id_1
1960 (cp_parser
*, bool, bool);
1961 static void cp_parser_type_specifier_seq
1962 (cp_parser
*, bool, bool, cp_decl_specifier_seq
*);
1963 static tree cp_parser_parameter_declaration_clause
1965 static tree cp_parser_parameter_declaration_list
1966 (cp_parser
*, bool *);
1967 static cp_parameter_declarator
*cp_parser_parameter_declaration
1968 (cp_parser
*, bool, bool *);
1969 static tree cp_parser_default_argument
1970 (cp_parser
*, bool);
1971 static void cp_parser_function_body
1973 static tree cp_parser_initializer
1974 (cp_parser
*, bool *, bool *);
1975 static tree cp_parser_initializer_clause
1976 (cp_parser
*, bool *);
1977 static tree cp_parser_braced_list
1978 (cp_parser
*, bool*);
1979 static VEC(constructor_elt
,gc
) *cp_parser_initializer_list
1980 (cp_parser
*, bool *);
1982 static bool cp_parser_ctor_initializer_opt_and_function_body
1985 /* Classes [gram.class] */
1987 static tree cp_parser_class_name
1988 (cp_parser
*, bool, bool, enum tag_types
, bool, bool, bool);
1989 static tree cp_parser_class_specifier
1991 static tree cp_parser_class_head
1992 (cp_parser
*, bool *, tree
*, tree
*);
1993 static enum tag_types cp_parser_class_key
1995 static void cp_parser_member_specification_opt
1997 static void cp_parser_member_declaration
1999 static tree cp_parser_pure_specifier
2001 static tree cp_parser_constant_initializer
2004 /* Derived classes [gram.class.derived] */
2006 static tree cp_parser_base_clause
2008 static tree cp_parser_base_specifier
2011 /* Special member functions [gram.special] */
2013 static tree cp_parser_conversion_function_id
2015 static tree cp_parser_conversion_type_id
2017 static cp_declarator
*cp_parser_conversion_declarator_opt
2019 static bool cp_parser_ctor_initializer_opt
2021 static void cp_parser_mem_initializer_list
2023 static tree cp_parser_mem_initializer
2025 static tree cp_parser_mem_initializer_id
2028 /* Overloading [gram.over] */
2030 static tree cp_parser_operator_function_id
2032 static tree cp_parser_operator
2035 /* Templates [gram.temp] */
2037 static void cp_parser_template_declaration
2038 (cp_parser
*, bool);
2039 static tree cp_parser_template_parameter_list
2041 static tree cp_parser_template_parameter
2042 (cp_parser
*, bool *, bool *);
2043 static tree cp_parser_type_parameter
2044 (cp_parser
*, bool *);
2045 static tree cp_parser_template_id
2046 (cp_parser
*, bool, bool, bool);
2047 static tree cp_parser_template_name
2048 (cp_parser
*, bool, bool, bool, bool *);
2049 static tree cp_parser_template_argument_list
2051 static tree cp_parser_template_argument
2053 static void cp_parser_explicit_instantiation
2055 static void cp_parser_explicit_specialization
2058 /* Exception handling [gram.exception] */
2060 static tree cp_parser_try_block
2062 static bool cp_parser_function_try_block
2064 static void cp_parser_handler_seq
2066 static void cp_parser_handler
2068 static tree cp_parser_exception_declaration
2070 static tree cp_parser_throw_expression
2072 static tree cp_parser_exception_specification_opt
2074 static tree cp_parser_type_id_list
2077 /* GNU Extensions */
2079 static tree cp_parser_asm_specification_opt
2081 static tree cp_parser_asm_operand_list
2083 static tree cp_parser_asm_clobber_list
2085 static tree cp_parser_asm_label_list
2087 static tree cp_parser_attributes_opt
2089 static tree cp_parser_attribute_list
2091 static bool cp_parser_extension_opt
2092 (cp_parser
*, int *);
2093 static void cp_parser_label_declaration
2096 enum pragma_context
{ pragma_external
, pragma_stmt
, pragma_compound
};
2097 static bool cp_parser_pragma
2098 (cp_parser
*, enum pragma_context
);
2100 /* Objective-C++ Productions */
2102 static tree cp_parser_objc_message_receiver
2104 static tree cp_parser_objc_message_args
2106 static tree cp_parser_objc_message_expression
2108 static tree cp_parser_objc_encode_expression
2110 static tree cp_parser_objc_defs_expression
2112 static tree cp_parser_objc_protocol_expression
2114 static tree cp_parser_objc_selector_expression
2116 static tree cp_parser_objc_expression
2118 static bool cp_parser_objc_selector_p
2120 static tree cp_parser_objc_selector
2122 static tree cp_parser_objc_protocol_refs_opt
2124 static void cp_parser_objc_declaration
2125 (cp_parser
*, tree
);
2126 static tree cp_parser_objc_statement
2128 static bool cp_parser_objc_valid_prefix_attributes
2129 (cp_parser
*, tree
*);
2130 static void cp_parser_objc_at_property_declaration
2132 static void cp_parser_objc_at_synthesize_declaration
2134 static void cp_parser_objc_at_dynamic_declaration
2136 static tree cp_parser_objc_struct_declaration
2139 /* Utility Routines */
2141 static tree cp_parser_lookup_name
2142 (cp_parser
*, tree
, enum tag_types
, bool, bool, bool, tree
*, location_t
);
2143 static tree cp_parser_lookup_name_simple
2144 (cp_parser
*, tree
, location_t
);
2145 static tree cp_parser_maybe_treat_template_as_class
2147 static bool cp_parser_check_declarator_template_parameters
2148 (cp_parser
*, cp_declarator
*, location_t
);
2149 static bool cp_parser_check_template_parameters
2150 (cp_parser
*, unsigned, location_t
, cp_declarator
*);
2151 static tree cp_parser_simple_cast_expression
2153 static tree cp_parser_global_scope_opt
2154 (cp_parser
*, bool);
2155 static bool cp_parser_constructor_declarator_p
2156 (cp_parser
*, bool);
2157 static tree cp_parser_function_definition_from_specifiers_and_declarator
2158 (cp_parser
*, cp_decl_specifier_seq
*, tree
, const cp_declarator
*);
2159 static tree cp_parser_function_definition_after_declarator
2160 (cp_parser
*, bool);
2161 static void cp_parser_template_declaration_after_export
2162 (cp_parser
*, bool);
2163 static void cp_parser_perform_template_parameter_access_checks
2164 (VEC (deferred_access_check
,gc
)*);
2165 static tree cp_parser_single_declaration
2166 (cp_parser
*, VEC (deferred_access_check
,gc
)*, bool, bool, bool *);
2167 static tree cp_parser_functional_cast
2168 (cp_parser
*, tree
);
2169 static tree cp_parser_save_member_function_body
2170 (cp_parser
*, cp_decl_specifier_seq
*, cp_declarator
*, tree
);
2171 static tree cp_parser_enclosed_template_argument_list
2173 static void cp_parser_save_default_args
2174 (cp_parser
*, tree
);
2175 static void cp_parser_late_parsing_for_member
2176 (cp_parser
*, tree
);
2177 static void cp_parser_late_parsing_default_args
2178 (cp_parser
*, tree
);
2179 static tree cp_parser_sizeof_operand
2180 (cp_parser
*, enum rid
);
2181 static tree cp_parser_trait_expr
2182 (cp_parser
*, enum rid
);
2183 static bool cp_parser_declares_only_class_p
2185 static void cp_parser_set_storage_class
2186 (cp_parser
*, cp_decl_specifier_seq
*, enum rid
, location_t
);
2187 static void cp_parser_set_decl_spec_type
2188 (cp_decl_specifier_seq
*, tree
, location_t
, bool);
2189 static bool cp_parser_friend_p
2190 (const cp_decl_specifier_seq
*);
2191 static void cp_parser_required_error
2192 (cp_parser
*, required_token
, bool);
2193 static cp_token
*cp_parser_require
2194 (cp_parser
*, enum cpp_ttype
, required_token
);
2195 static cp_token
*cp_parser_require_keyword
2196 (cp_parser
*, enum rid
, required_token
);
2197 static bool cp_parser_token_starts_function_definition_p
2199 static bool cp_parser_next_token_starts_class_definition_p
2201 static bool cp_parser_next_token_ends_template_argument_p
2203 static bool cp_parser_nth_token_starts_template_argument_list_p
2204 (cp_parser
*, size_t);
2205 static enum tag_types cp_parser_token_is_class_key
2207 static void cp_parser_check_class_key
2208 (enum tag_types
, tree type
);
2209 static void cp_parser_check_access_in_redeclaration
2210 (tree type
, location_t location
);
2211 static bool cp_parser_optional_template_keyword
2213 static void cp_parser_pre_parsed_nested_name_specifier
2215 static bool cp_parser_cache_group
2216 (cp_parser
*, enum cpp_ttype
, unsigned);
2217 static void cp_parser_parse_tentatively
2219 static void cp_parser_commit_to_tentative_parse
2221 static void cp_parser_abort_tentative_parse
2223 static bool cp_parser_parse_definitely
2225 static inline bool cp_parser_parsing_tentatively
2227 static bool cp_parser_uncommitted_to_tentative_parse_p
2229 static void cp_parser_error
2230 (cp_parser
*, const char *);
2231 static void cp_parser_name_lookup_error
2232 (cp_parser
*, tree
, tree
, name_lookup_error
, location_t
);
2233 static bool cp_parser_simulate_error
2235 static bool cp_parser_check_type_definition
2237 static void cp_parser_check_for_definition_in_return_type
2238 (cp_declarator
*, tree
, location_t type_location
);
2239 static void cp_parser_check_for_invalid_template_id
2240 (cp_parser
*, tree
, location_t location
);
2241 static bool cp_parser_non_integral_constant_expression
2242 (cp_parser
*, non_integral_constant
);
2243 static void cp_parser_diagnose_invalid_type_name
2244 (cp_parser
*, tree
, tree
, location_t
);
2245 static bool cp_parser_parse_and_diagnose_invalid_type_name
2247 static int cp_parser_skip_to_closing_parenthesis
2248 (cp_parser
*, bool, bool, bool);
2249 static void cp_parser_skip_to_end_of_statement
2251 static void cp_parser_consume_semicolon_at_end_of_statement
2253 static void cp_parser_skip_to_end_of_block_or_statement
2255 static bool cp_parser_skip_to_closing_brace
2257 static void cp_parser_skip_to_end_of_template_parameter_list
2259 static void cp_parser_skip_to_pragma_eol
2260 (cp_parser
*, cp_token
*);
2261 static bool cp_parser_error_occurred
2263 static bool cp_parser_allow_gnu_extensions_p
2265 static bool cp_parser_is_string_literal
2267 static bool cp_parser_is_keyword
2268 (cp_token
*, enum rid
);
2269 static tree cp_parser_make_typename_type
2270 (cp_parser
*, tree
, tree
, location_t location
);
2271 static cp_declarator
* cp_parser_make_indirect_declarator
2272 (enum tree_code
, tree
, cp_cv_quals
, cp_declarator
*);
2274 /* Returns nonzero if we are parsing tentatively. */
2277 cp_parser_parsing_tentatively (cp_parser
* parser
)
2279 return parser
->context
->next
!= NULL
;
2282 /* Returns nonzero if TOKEN is a string literal. */
2285 cp_parser_is_string_literal (cp_token
* token
)
2287 return (token
->type
== CPP_STRING
||
2288 token
->type
== CPP_STRING16
||
2289 token
->type
== CPP_STRING32
||
2290 token
->type
== CPP_WSTRING
||
2291 token
->type
== CPP_UTF8STRING
);
2294 /* Returns nonzero if TOKEN is the indicated KEYWORD. */
2297 cp_parser_is_keyword (cp_token
* token
, enum rid keyword
)
2299 return token
->keyword
== keyword
;
2302 /* If not parsing tentatively, issue a diagnostic of the form
2303 FILE:LINE: MESSAGE before TOKEN
2304 where TOKEN is the next token in the input stream. MESSAGE
2305 (specified by the caller) is usually of the form "expected
2309 cp_parser_error (cp_parser
* parser
, const char* gmsgid
)
2311 if (!cp_parser_simulate_error (parser
))
2313 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
2314 /* This diagnostic makes more sense if it is tagged to the line
2315 of the token we just peeked at. */
2316 cp_lexer_set_source_position_from_token (token
);
2318 if (token
->type
== CPP_PRAGMA
)
2320 error_at (token
->location
,
2321 "%<#pragma%> is not allowed here");
2322 cp_parser_skip_to_pragma_eol (parser
, token
);
2326 c_parse_error (gmsgid
,
2327 /* Because c_parser_error does not understand
2328 CPP_KEYWORD, keywords are treated like
2330 (token
->type
== CPP_KEYWORD
? CPP_NAME
: token
->type
),
2331 token
->u
.value
, token
->flags
);
2335 /* Issue an error about name-lookup failing. NAME is the
2336 IDENTIFIER_NODE DECL is the result of
2337 the lookup (as returned from cp_parser_lookup_name). DESIRED is
2338 the thing that we hoped to find. */
2341 cp_parser_name_lookup_error (cp_parser
* parser
,
2344 name_lookup_error desired
,
2345 location_t location
)
2347 /* If name lookup completely failed, tell the user that NAME was not
2349 if (decl
== error_mark_node
)
2351 if (parser
->scope
&& parser
->scope
!= global_namespace
)
2352 error_at (location
, "%<%E::%E%> has not been declared",
2353 parser
->scope
, name
);
2354 else if (parser
->scope
== global_namespace
)
2355 error_at (location
, "%<::%E%> has not been declared", name
);
2356 else if (parser
->object_scope
2357 && !CLASS_TYPE_P (parser
->object_scope
))
2358 error_at (location
, "request for member %qE in non-class type %qT",
2359 name
, parser
->object_scope
);
2360 else if (parser
->object_scope
)
2361 error_at (location
, "%<%T::%E%> has not been declared",
2362 parser
->object_scope
, name
);
2364 error_at (location
, "%qE has not been declared", name
);
2366 else if (parser
->scope
&& parser
->scope
!= global_namespace
)
2371 error_at (location
, "%<%E::%E%> is not a type",
2372 parser
->scope
, name
);
2375 error_at (location
, "%<%E::%E%> is not a class or namespace",
2376 parser
->scope
, name
);
2380 "%<%E::%E%> is not a class, namespace, or enumeration",
2381 parser
->scope
, name
);
2388 else if (parser
->scope
== global_namespace
)
2393 error_at (location
, "%<::%E%> is not a type", name
);
2396 error_at (location
, "%<::%E%> is not a class or namespace", name
);
2400 "%<::%E%> is not a class, namespace, or enumeration",
2412 error_at (location
, "%qE is not a type", name
);
2415 error_at (location
, "%qE is not a class or namespace", name
);
2419 "%qE is not a class, namespace, or enumeration", name
);
2427 /* If we are parsing tentatively, remember that an error has occurred
2428 during this tentative parse. Returns true if the error was
2429 simulated; false if a message should be issued by the caller. */
2432 cp_parser_simulate_error (cp_parser
* parser
)
2434 if (cp_parser_uncommitted_to_tentative_parse_p (parser
))
2436 parser
->context
->status
= CP_PARSER_STATUS_KIND_ERROR
;
2442 /* Check for repeated decl-specifiers. */
2445 cp_parser_check_decl_spec (cp_decl_specifier_seq
*decl_specs
,
2446 location_t location
)
2450 for (ds
= ds_first
; ds
!= ds_last
; ++ds
)
2452 unsigned count
= decl_specs
->specs
[ds
];
2455 /* The "long" specifier is a special case because of "long long". */
2459 error_at (location
, "%<long long long%> is too long for GCC");
2461 pedwarn_cxx98 (location
, OPT_Wlong_long
,
2462 "ISO C++ 1998 does not support %<long long%>");
2466 static const char *const decl_spec_names
[] = {
2483 error_at (location
, "duplicate %qs", decl_spec_names
[ds
]);
2488 /* This function is called when a type is defined. If type
2489 definitions are forbidden at this point, an error message is
2493 cp_parser_check_type_definition (cp_parser
* parser
)
2495 /* If types are forbidden here, issue a message. */
2496 if (parser
->type_definition_forbidden_message
)
2498 /* Don't use `%s' to print the string, because quotations (`%<', `%>')
2499 in the message need to be interpreted. */
2500 error (parser
->type_definition_forbidden_message
);
2506 /* This function is called when the DECLARATOR is processed. The TYPE
2507 was a type defined in the decl-specifiers. If it is invalid to
2508 define a type in the decl-specifiers for DECLARATOR, an error is
2509 issued. TYPE_LOCATION is the location of TYPE and is used
2510 for error reporting. */
2513 cp_parser_check_for_definition_in_return_type (cp_declarator
*declarator
,
2514 tree type
, location_t type_location
)
2516 /* [dcl.fct] forbids type definitions in return types.
2517 Unfortunately, it's not easy to know whether or not we are
2518 processing a return type until after the fact. */
2520 && (declarator
->kind
== cdk_pointer
2521 || declarator
->kind
== cdk_reference
2522 || declarator
->kind
== cdk_ptrmem
))
2523 declarator
= declarator
->declarator
;
2525 && declarator
->kind
== cdk_function
)
2527 error_at (type_location
,
2528 "new types may not be defined in a return type");
2529 inform (type_location
,
2530 "(perhaps a semicolon is missing after the definition of %qT)",
2535 /* A type-specifier (TYPE) has been parsed which cannot be followed by
2536 "<" in any valid C++ program. If the next token is indeed "<",
2537 issue a message warning the user about what appears to be an
2538 invalid attempt to form a template-id. LOCATION is the location
2539 of the type-specifier (TYPE) */
2542 cp_parser_check_for_invalid_template_id (cp_parser
* parser
,
2543 tree type
, location_t location
)
2545 cp_token_position start
= 0;
2547 if (cp_lexer_next_token_is (parser
->lexer
, CPP_LESS
))
2550 error_at (location
, "%qT is not a template", type
);
2551 else if (TREE_CODE (type
) == IDENTIFIER_NODE
)
2552 error_at (location
, "%qE is not a template", type
);
2554 error_at (location
, "invalid template-id");
2555 /* Remember the location of the invalid "<". */
2556 if (cp_parser_uncommitted_to_tentative_parse_p (parser
))
2557 start
= cp_lexer_token_position (parser
->lexer
, true);
2558 /* Consume the "<". */
2559 cp_lexer_consume_token (parser
->lexer
);
2560 /* Parse the template arguments. */
2561 cp_parser_enclosed_template_argument_list (parser
);
2562 /* Permanently remove the invalid template arguments so that
2563 this error message is not issued again. */
2565 cp_lexer_purge_tokens_after (parser
->lexer
, start
);
2569 /* If parsing an integral constant-expression, issue an error message
2570 about the fact that THING appeared and return true. Otherwise,
2571 return false. In either case, set
2572 PARSER->NON_INTEGRAL_CONSTANT_EXPRESSION_P. */
2575 cp_parser_non_integral_constant_expression (cp_parser
*parser
,
2576 non_integral_constant thing
)
2578 parser
->non_integral_constant_expression_p
= true;
2579 if (parser
->integral_constant_expression_p
)
2581 if (!parser
->allow_non_integral_constant_expression_p
)
2583 const char *msg
= NULL
;
2587 error ("floating-point literal "
2588 "cannot appear in a constant-expression");
2591 error ("a cast to a type other than an integral or "
2592 "enumeration type cannot appear in a "
2593 "constant-expression");
2596 error ("%<typeid%> operator "
2597 "cannot appear in a constant-expression");
2600 error ("non-constant compound literals "
2601 "cannot appear in a constant-expression");
2604 error ("a function call "
2605 "cannot appear in a constant-expression");
2608 error ("an increment "
2609 "cannot appear in a constant-expression");
2612 error ("an decrement "
2613 "cannot appear in a constant-expression");
2616 error ("an array reference "
2617 "cannot appear in a constant-expression");
2619 case NIC_ADDR_LABEL
:
2620 error ("the address of a label "
2621 "cannot appear in a constant-expression");
2623 case NIC_OVERLOADED
:
2624 error ("calls to overloaded operators "
2625 "cannot appear in a constant-expression");
2627 case NIC_ASSIGNMENT
:
2628 error ("an assignment cannot appear in a constant-expression");
2631 error ("a comma operator "
2632 "cannot appear in a constant-expression");
2634 case NIC_CONSTRUCTOR
:
2635 error ("a call to a constructor "
2636 "cannot appear in a constant-expression");
2642 msg
= "__FUNCTION__";
2644 case NIC_PRETTY_FUNC
:
2645 msg
= "__PRETTY_FUNCTION__";
2665 case NIC_PREINCREMENT
:
2668 case NIC_PREDECREMENT
:
2681 error ("%qs cannot appear in a constant-expression", msg
);
2688 /* Emit a diagnostic for an invalid type name. SCOPE is the
2689 qualifying scope (or NULL, if none) for ID. This function commits
2690 to the current active tentative parse, if any. (Otherwise, the
2691 problematic construct might be encountered again later, resulting
2692 in duplicate error messages.) LOCATION is the location of ID. */
2695 cp_parser_diagnose_invalid_type_name (cp_parser
*parser
,
2696 tree scope
, tree id
,
2697 location_t location
)
2699 tree decl
, old_scope
;
2700 /* Try to lookup the identifier. */
2701 old_scope
= parser
->scope
;
2702 parser
->scope
= scope
;
2703 decl
= cp_parser_lookup_name_simple (parser
, id
, location
);
2704 parser
->scope
= old_scope
;
2705 /* If the lookup found a template-name, it means that the user forgot
2706 to specify an argument list. Emit a useful error message. */
2707 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
2709 "invalid use of template-name %qE without an argument list",
2711 else if (TREE_CODE (id
) == BIT_NOT_EXPR
)
2712 error_at (location
, "invalid use of destructor %qD as a type", id
);
2713 else if (TREE_CODE (decl
) == TYPE_DECL
)
2714 /* Something like 'unsigned A a;' */
2715 error_at (location
, "invalid combination of multiple type-specifiers");
2716 else if (!parser
->scope
)
2718 /* Issue an error message. */
2719 error_at (location
, "%qE does not name a type", id
);
2720 /* If we're in a template class, it's possible that the user was
2721 referring to a type from a base class. For example:
2723 template <typename T> struct A { typedef T X; };
2724 template <typename T> struct B : public A<T> { X x; };
2726 The user should have said "typename A<T>::X". */
2727 if (cxx_dialect
< cxx0x
&& id
== ridpointers
[(int)RID_CONSTEXPR
])
2728 inform (location
, "C++0x %<constexpr%> only available with "
2729 "-std=c++0x or -std=gnu++0x");
2730 else if (processing_template_decl
&& current_class_type
2731 && TYPE_BINFO (current_class_type
))
2735 for (b
= TREE_CHAIN (TYPE_BINFO (current_class_type
));
2739 tree base_type
= BINFO_TYPE (b
);
2740 if (CLASS_TYPE_P (base_type
)
2741 && dependent_type_p (base_type
))
2744 /* Go from a particular instantiation of the
2745 template (which will have an empty TYPE_FIELDs),
2746 to the main version. */
2747 base_type
= CLASSTYPE_PRIMARY_TEMPLATE_TYPE (base_type
);
2748 for (field
= TYPE_FIELDS (base_type
);
2750 field
= DECL_CHAIN (field
))
2751 if (TREE_CODE (field
) == TYPE_DECL
2752 && DECL_NAME (field
) == id
)
2755 "(perhaps %<typename %T::%E%> was intended)",
2756 BINFO_TYPE (b
), id
);
2765 /* Here we diagnose qualified-ids where the scope is actually correct,
2766 but the identifier does not resolve to a valid type name. */
2767 else if (parser
->scope
!= error_mark_node
)
2769 if (TREE_CODE (parser
->scope
) == NAMESPACE_DECL
)
2770 error_at (location
, "%qE in namespace %qE does not name a type",
2772 else if (CLASS_TYPE_P (parser
->scope
)
2773 && constructor_name_p (id
, parser
->scope
))
2776 error_at (location
, "%<%T::%E%> names the constructor, not"
2777 " the type", parser
->scope
, id
);
2778 if (cp_lexer_next_token_is (parser
->lexer
, CPP_LESS
))
2779 error_at (location
, "and %qT has no template constructors",
2782 else if (TYPE_P (parser
->scope
)
2783 && dependent_scope_p (parser
->scope
))
2784 error_at (location
, "need %<typename%> before %<%T::%E%> because "
2785 "%qT is a dependent scope",
2786 parser
->scope
, id
, parser
->scope
);
2787 else if (TYPE_P (parser
->scope
))
2788 error_at (location
, "%qE in class %qT does not name a type",
2793 cp_parser_commit_to_tentative_parse (parser
);
2796 /* Check for a common situation where a type-name should be present,
2797 but is not, and issue a sensible error message. Returns true if an
2798 invalid type-name was detected.
2800 The situation handled by this function are variable declarations of the
2801 form `ID a', where `ID' is an id-expression and `a' is a plain identifier.
2802 Usually, `ID' should name a type, but if we got here it means that it
2803 does not. We try to emit the best possible error message depending on
2804 how exactly the id-expression looks like. */
2807 cp_parser_parse_and_diagnose_invalid_type_name (cp_parser
*parser
)
2810 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
2812 /* Avoid duplicate error about ambiguous lookup. */
2813 if (token
->type
== CPP_NESTED_NAME_SPECIFIER
)
2815 cp_token
*next
= cp_lexer_peek_nth_token (parser
->lexer
, 2);
2816 if (next
->type
== CPP_NAME
&& next
->ambiguous_p
)
2820 cp_parser_parse_tentatively (parser
);
2821 id
= cp_parser_id_expression (parser
,
2822 /*template_keyword_p=*/false,
2823 /*check_dependency_p=*/true,
2824 /*template_p=*/NULL
,
2825 /*declarator_p=*/true,
2826 /*optional_p=*/false);
2827 /* If the next token is a (, this is a function with no explicit return
2828 type, i.e. constructor, destructor or conversion op. */
2829 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_PAREN
)
2830 || TREE_CODE (id
) == TYPE_DECL
)
2832 cp_parser_abort_tentative_parse (parser
);
2835 if (!cp_parser_parse_definitely (parser
))
2838 /* Emit a diagnostic for the invalid type. */
2839 cp_parser_diagnose_invalid_type_name (parser
, parser
->scope
,
2840 id
, token
->location
);
2842 /* If we aren't in the middle of a declarator (i.e. in a
2843 parameter-declaration-clause), skip to the end of the declaration;
2844 there's no point in trying to process it. */
2845 if (!parser
->in_declarator_p
)
2846 cp_parser_skip_to_end_of_block_or_statement (parser
);
2850 /* Consume tokens up to, and including, the next non-nested closing `)'.
2851 Returns 1 iff we found a closing `)'. RECOVERING is true, if we
2852 are doing error recovery. Returns -1 if OR_COMMA is true and we
2853 found an unnested comma. */
2856 cp_parser_skip_to_closing_parenthesis (cp_parser
*parser
,
2861 unsigned paren_depth
= 0;
2862 unsigned brace_depth
= 0;
2863 unsigned square_depth
= 0;
2865 if (recovering
&& !or_comma
2866 && cp_parser_uncommitted_to_tentative_parse_p (parser
))
2871 cp_token
* token
= cp_lexer_peek_token (parser
->lexer
);
2873 switch (token
->type
)
2876 case CPP_PRAGMA_EOL
:
2877 /* If we've run out of tokens, then there is no closing `)'. */
2880 /* This is good for lambda expression capture-lists. */
2881 case CPP_OPEN_SQUARE
:
2884 case CPP_CLOSE_SQUARE
:
2885 if (!square_depth
--)
2890 /* This matches the processing in skip_to_end_of_statement. */
2895 case CPP_OPEN_BRACE
:
2898 case CPP_CLOSE_BRACE
:
2904 if (recovering
&& or_comma
&& !brace_depth
&& !paren_depth
2909 case CPP_OPEN_PAREN
:
2914 case CPP_CLOSE_PAREN
:
2915 if (!brace_depth
&& !paren_depth
--)
2918 cp_lexer_consume_token (parser
->lexer
);
2927 /* Consume the token. */
2928 cp_lexer_consume_token (parser
->lexer
);
2932 /* Consume tokens until we reach the end of the current statement.
2933 Normally, that will be just before consuming a `;'. However, if a
2934 non-nested `}' comes first, then we stop before consuming that. */
2937 cp_parser_skip_to_end_of_statement (cp_parser
* parser
)
2939 unsigned nesting_depth
= 0;
2943 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
2945 switch (token
->type
)
2948 case CPP_PRAGMA_EOL
:
2949 /* If we've run out of tokens, stop. */
2953 /* If the next token is a `;', we have reached the end of the
2959 case CPP_CLOSE_BRACE
:
2960 /* If this is a non-nested '}', stop before consuming it.
2961 That way, when confronted with something like:
2965 we stop before consuming the closing '}', even though we
2966 have not yet reached a `;'. */
2967 if (nesting_depth
== 0)
2970 /* If it is the closing '}' for a block that we have
2971 scanned, stop -- but only after consuming the token.
2977 we will stop after the body of the erroneously declared
2978 function, but before consuming the following `typedef'
2980 if (--nesting_depth
== 0)
2982 cp_lexer_consume_token (parser
->lexer
);
2986 case CPP_OPEN_BRACE
:
2994 /* Consume the token. */
2995 cp_lexer_consume_token (parser
->lexer
);
2999 /* This function is called at the end of a statement or declaration.
3000 If the next token is a semicolon, it is consumed; otherwise, error
3001 recovery is attempted. */
3004 cp_parser_consume_semicolon_at_end_of_statement (cp_parser
*parser
)
3006 /* Look for the trailing `;'. */
3007 if (!cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
))
3009 /* If there is additional (erroneous) input, skip to the end of
3011 cp_parser_skip_to_end_of_statement (parser
);
3012 /* If the next token is now a `;', consume it. */
3013 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
3014 cp_lexer_consume_token (parser
->lexer
);
3018 /* Skip tokens until we have consumed an entire block, or until we
3019 have consumed a non-nested `;'. */
3022 cp_parser_skip_to_end_of_block_or_statement (cp_parser
* parser
)
3024 int nesting_depth
= 0;
3026 while (nesting_depth
>= 0)
3028 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
3030 switch (token
->type
)
3033 case CPP_PRAGMA_EOL
:
3034 /* If we've run out of tokens, stop. */
3038 /* Stop if this is an unnested ';'. */
3043 case CPP_CLOSE_BRACE
:
3044 /* Stop if this is an unnested '}', or closes the outermost
3047 if (nesting_depth
< 0)
3053 case CPP_OPEN_BRACE
:
3062 /* Consume the token. */
3063 cp_lexer_consume_token (parser
->lexer
);
3067 /* Skip tokens until a non-nested closing curly brace is the next
3068 token, or there are no more tokens. Return true in the first case,
3072 cp_parser_skip_to_closing_brace (cp_parser
*parser
)
3074 unsigned nesting_depth
= 0;
3078 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
3080 switch (token
->type
)
3083 case CPP_PRAGMA_EOL
:
3084 /* If we've run out of tokens, stop. */
3087 case CPP_CLOSE_BRACE
:
3088 /* If the next token is a non-nested `}', then we have reached
3089 the end of the current block. */
3090 if (nesting_depth
-- == 0)
3094 case CPP_OPEN_BRACE
:
3095 /* If it the next token is a `{', then we are entering a new
3096 block. Consume the entire block. */
3104 /* Consume the token. */
3105 cp_lexer_consume_token (parser
->lexer
);
3109 /* Consume tokens until we reach the end of the pragma. The PRAGMA_TOK
3110 parameter is the PRAGMA token, allowing us to purge the entire pragma
3114 cp_parser_skip_to_pragma_eol (cp_parser
* parser
, cp_token
*pragma_tok
)
3118 parser
->lexer
->in_pragma
= false;
3121 token
= cp_lexer_consume_token (parser
->lexer
);
3122 while (token
->type
!= CPP_PRAGMA_EOL
&& token
->type
!= CPP_EOF
);
3124 /* Ensure that the pragma is not parsed again. */
3125 cp_lexer_purge_tokens_after (parser
->lexer
, pragma_tok
);
3128 /* Require pragma end of line, resyncing with it as necessary. The
3129 arguments are as for cp_parser_skip_to_pragma_eol. */
3132 cp_parser_require_pragma_eol (cp_parser
*parser
, cp_token
*pragma_tok
)
3134 parser
->lexer
->in_pragma
= false;
3135 if (!cp_parser_require (parser
, CPP_PRAGMA_EOL
, RT_PRAGMA_EOL
))
3136 cp_parser_skip_to_pragma_eol (parser
, pragma_tok
);
3139 /* This is a simple wrapper around make_typename_type. When the id is
3140 an unresolved identifier node, we can provide a superior diagnostic
3141 using cp_parser_diagnose_invalid_type_name. */
3144 cp_parser_make_typename_type (cp_parser
*parser
, tree scope
,
3145 tree id
, location_t id_location
)
3148 if (TREE_CODE (id
) == IDENTIFIER_NODE
)
3150 result
= make_typename_type (scope
, id
, typename_type
,
3151 /*complain=*/tf_none
);
3152 if (result
== error_mark_node
)
3153 cp_parser_diagnose_invalid_type_name (parser
, scope
, id
, id_location
);
3156 return make_typename_type (scope
, id
, typename_type
, tf_error
);
3159 /* This is a wrapper around the
3160 make_{pointer,ptrmem,reference}_declarator functions that decides
3161 which one to call based on the CODE and CLASS_TYPE arguments. The
3162 CODE argument should be one of the values returned by
3163 cp_parser_ptr_operator. */
3164 static cp_declarator
*
3165 cp_parser_make_indirect_declarator (enum tree_code code
, tree class_type
,
3166 cp_cv_quals cv_qualifiers
,
3167 cp_declarator
*target
)
3169 if (code
== ERROR_MARK
)
3170 return cp_error_declarator
;
3172 if (code
== INDIRECT_REF
)
3173 if (class_type
== NULL_TREE
)
3174 return make_pointer_declarator (cv_qualifiers
, target
);
3176 return make_ptrmem_declarator (cv_qualifiers
, class_type
, target
);
3177 else if (code
== ADDR_EXPR
&& class_type
== NULL_TREE
)
3178 return make_reference_declarator (cv_qualifiers
, target
, false);
3179 else if (code
== NON_LVALUE_EXPR
&& class_type
== NULL_TREE
)
3180 return make_reference_declarator (cv_qualifiers
, target
, true);
3184 /* Create a new C++ parser. */
3187 cp_parser_new (void)
3193 /* cp_lexer_new_main is called before doing GC allocation because
3194 cp_lexer_new_main might load a PCH file. */
3195 lexer
= cp_lexer_new_main ();
3197 /* Initialize the binops_by_token so that we can get the tree
3198 directly from the token. */
3199 for (i
= 0; i
< sizeof (binops
) / sizeof (binops
[0]); i
++)
3200 binops_by_token
[binops
[i
].token_type
] = binops
[i
];
3202 parser
= ggc_alloc_cleared_cp_parser ();
3203 parser
->lexer
= lexer
;
3204 parser
->context
= cp_parser_context_new (NULL
);
3206 /* For now, we always accept GNU extensions. */
3207 parser
->allow_gnu_extensions_p
= 1;
3209 /* The `>' token is a greater-than operator, not the end of a
3211 parser
->greater_than_is_operator_p
= true;
3213 parser
->default_arg_ok_p
= true;
3215 /* We are not parsing a constant-expression. */
3216 parser
->integral_constant_expression_p
= false;
3217 parser
->allow_non_integral_constant_expression_p
= false;
3218 parser
->non_integral_constant_expression_p
= false;
3220 /* Local variable names are not forbidden. */
3221 parser
->local_variables_forbidden_p
= false;
3223 /* We are not processing an `extern "C"' declaration. */
3224 parser
->in_unbraced_linkage_specification_p
= false;
3226 /* We are not processing a declarator. */
3227 parser
->in_declarator_p
= false;
3229 /* We are not processing a template-argument-list. */
3230 parser
->in_template_argument_list_p
= false;
3232 /* We are not in an iteration statement. */
3233 parser
->in_statement
= 0;
3235 /* We are not in a switch statement. */
3236 parser
->in_switch_statement_p
= false;
3238 /* We are not parsing a type-id inside an expression. */
3239 parser
->in_type_id_in_expr_p
= false;
3241 /* Declarations aren't implicitly extern "C". */
3242 parser
->implicit_extern_c
= false;
3244 /* String literals should be translated to the execution character set. */
3245 parser
->translate_strings_p
= true;
3247 /* We are not parsing a function body. */
3248 parser
->in_function_body
= false;
3250 /* We can correct until told otherwise. */
3251 parser
->colon_corrects_to_scope_p
= true;
3253 /* The unparsed function queue is empty. */
3254 push_unparsed_function_queues (parser
);
3256 /* There are no classes being defined. */
3257 parser
->num_classes_being_defined
= 0;
3259 /* No template parameters apply. */
3260 parser
->num_template_parameter_lists
= 0;
3265 /* Create a cp_lexer structure which will emit the tokens in CACHE
3266 and push it onto the parser's lexer stack. This is used for delayed
3267 parsing of in-class method bodies and default arguments, and should
3268 not be confused with tentative parsing. */
3270 cp_parser_push_lexer_for_tokens (cp_parser
*parser
, cp_token_cache
*cache
)
3272 cp_lexer
*lexer
= cp_lexer_new_from_tokens (cache
);
3273 lexer
->next
= parser
->lexer
;
3274 parser
->lexer
= lexer
;
3276 /* Move the current source position to that of the first token in the
3278 cp_lexer_set_source_position_from_token (lexer
->next_token
);
3281 /* Pop the top lexer off the parser stack. This is never used for the
3282 "main" lexer, only for those pushed by cp_parser_push_lexer_for_tokens. */
3284 cp_parser_pop_lexer (cp_parser
*parser
)
3286 cp_lexer
*lexer
= parser
->lexer
;
3287 parser
->lexer
= lexer
->next
;
3288 cp_lexer_destroy (lexer
);
3290 /* Put the current source position back where it was before this
3291 lexer was pushed. */
3292 cp_lexer_set_source_position_from_token (parser
->lexer
->next_token
);
3295 /* Lexical conventions [gram.lex] */
3297 /* Parse an identifier. Returns an IDENTIFIER_NODE representing the
3301 cp_parser_identifier (cp_parser
* parser
)
3305 /* Look for the identifier. */
3306 token
= cp_parser_require (parser
, CPP_NAME
, RT_NAME
);
3307 /* Return the value. */
3308 return token
? token
->u
.value
: error_mark_node
;
3311 /* Parse a sequence of adjacent string constants. Returns a
3312 TREE_STRING representing the combined, nul-terminated string
3313 constant. If TRANSLATE is true, translate the string to the
3314 execution character set. If WIDE_OK is true, a wide string is
3317 C++98 [lex.string] says that if a narrow string literal token is
3318 adjacent to a wide string literal token, the behavior is undefined.
3319 However, C99 6.4.5p4 says that this results in a wide string literal.
3320 We follow C99 here, for consistency with the C front end.
3322 This code is largely lifted from lex_string() in c-lex.c.
3324 FUTURE: ObjC++ will need to handle @-strings here. */
3326 cp_parser_string_literal (cp_parser
*parser
, bool translate
, bool wide_ok
)
3330 struct obstack str_ob
;
3331 cpp_string str
, istr
, *strs
;
3333 enum cpp_ttype type
;
3335 tok
= cp_lexer_peek_token (parser
->lexer
);
3336 if (!cp_parser_is_string_literal (tok
))
3338 cp_parser_error (parser
, "expected string-literal");
3339 return error_mark_node
;
3344 /* Try to avoid the overhead of creating and destroying an obstack
3345 for the common case of just one string. */
3346 if (!cp_parser_is_string_literal
3347 (cp_lexer_peek_nth_token (parser
->lexer
, 2)))
3349 cp_lexer_consume_token (parser
->lexer
);
3351 str
.text
= (const unsigned char *)TREE_STRING_POINTER (tok
->u
.value
);
3352 str
.len
= TREE_STRING_LENGTH (tok
->u
.value
);
3359 gcc_obstack_init (&str_ob
);
3364 cp_lexer_consume_token (parser
->lexer
);
3366 str
.text
= (const unsigned char *)TREE_STRING_POINTER (tok
->u
.value
);
3367 str
.len
= TREE_STRING_LENGTH (tok
->u
.value
);
3369 if (type
!= tok
->type
)
3371 if (type
== CPP_STRING
)
3373 else if (tok
->type
!= CPP_STRING
)
3374 error_at (tok
->location
,
3375 "unsupported non-standard concatenation "
3376 "of string literals");
3379 obstack_grow (&str_ob
, &str
, sizeof (cpp_string
));
3381 tok
= cp_lexer_peek_token (parser
->lexer
);
3383 while (cp_parser_is_string_literal (tok
));
3385 strs
= (cpp_string
*) obstack_finish (&str_ob
);
3388 if (type
!= CPP_STRING
&& !wide_ok
)
3390 cp_parser_error (parser
, "a wide string is invalid in this context");
3394 if ((translate
? cpp_interpret_string
: cpp_interpret_string_notranslate
)
3395 (parse_in
, strs
, count
, &istr
, type
))
3397 value
= build_string (istr
.len
, (const char *)istr
.text
);
3398 free (CONST_CAST (unsigned char *, istr
.text
));
3404 case CPP_UTF8STRING
:
3405 TREE_TYPE (value
) = char_array_type_node
;
3408 TREE_TYPE (value
) = char16_array_type_node
;
3411 TREE_TYPE (value
) = char32_array_type_node
;
3414 TREE_TYPE (value
) = wchar_array_type_node
;
3418 value
= fix_string_type (value
);
3421 /* cpp_interpret_string has issued an error. */
3422 value
= error_mark_node
;
3425 obstack_free (&str_ob
, 0);
3431 /* Basic concepts [gram.basic] */
3433 /* Parse a translation-unit.
3436 declaration-seq [opt]
3438 Returns TRUE if all went well. */
3441 cp_parser_translation_unit (cp_parser
* parser
)
3443 /* The address of the first non-permanent object on the declarator
3445 static void *declarator_obstack_base
;
3449 /* Create the declarator obstack, if necessary. */
3450 if (!cp_error_declarator
)
3452 gcc_obstack_init (&declarator_obstack
);
3453 /* Create the error declarator. */
3454 cp_error_declarator
= make_declarator (cdk_error
);
3455 /* Create the empty parameter list. */
3456 no_parameters
= make_parameter_declarator (NULL
, NULL
, NULL_TREE
);
3457 /* Remember where the base of the declarator obstack lies. */
3458 declarator_obstack_base
= obstack_next_free (&declarator_obstack
);
3461 cp_parser_declaration_seq_opt (parser
);
3463 /* If there are no tokens left then all went well. */
3464 if (cp_lexer_next_token_is (parser
->lexer
, CPP_EOF
))
3466 /* Get rid of the token array; we don't need it any more. */
3467 cp_lexer_destroy (parser
->lexer
);
3468 parser
->lexer
= NULL
;
3470 /* This file might have been a context that's implicitly extern
3471 "C". If so, pop the lang context. (Only relevant for PCH.) */
3472 if (parser
->implicit_extern_c
)
3474 pop_lang_context ();
3475 parser
->implicit_extern_c
= false;
3479 finish_translation_unit ();
3485 cp_parser_error (parser
, "expected declaration");
3489 /* Make sure the declarator obstack was fully cleaned up. */
3490 gcc_assert (obstack_next_free (&declarator_obstack
)
3491 == declarator_obstack_base
);
3493 /* All went well. */
3497 /* Expressions [gram.expr] */
3499 /* Parse a primary-expression.
3510 ( compound-statement )
3511 __builtin_va_arg ( assignment-expression , type-id )
3512 __builtin_offsetof ( type-id , offsetof-expression )
3515 __has_nothrow_assign ( type-id )
3516 __has_nothrow_constructor ( type-id )
3517 __has_nothrow_copy ( type-id )
3518 __has_trivial_assign ( type-id )
3519 __has_trivial_constructor ( type-id )
3520 __has_trivial_copy ( type-id )
3521 __has_trivial_destructor ( type-id )
3522 __has_virtual_destructor ( type-id )
3523 __is_abstract ( type-id )
3524 __is_base_of ( type-id , type-id )
3525 __is_class ( type-id )
3526 __is_convertible_to ( type-id , type-id )
3527 __is_empty ( type-id )
3528 __is_enum ( type-id )
3529 __is_pod ( type-id )
3530 __is_polymorphic ( type-id )
3531 __is_union ( type-id )
3533 Objective-C++ Extension:
3541 ADDRESS_P is true iff this expression was immediately preceded by
3542 "&" and therefore might denote a pointer-to-member. CAST_P is true
3543 iff this expression is the target of a cast. TEMPLATE_ARG_P is
3544 true iff this expression is a template argument.
3546 Returns a representation of the expression. Upon return, *IDK
3547 indicates what kind of id-expression (if any) was present. */
3550 cp_parser_primary_expression (cp_parser
*parser
,
3553 bool template_arg_p
,
3556 cp_token
*token
= NULL
;
3558 /* Assume the primary expression is not an id-expression. */
3559 *idk
= CP_ID_KIND_NONE
;
3561 /* Peek at the next token. */
3562 token
= cp_lexer_peek_token (parser
->lexer
);
3563 switch (token
->type
)
3576 token
= cp_lexer_consume_token (parser
->lexer
);
3577 if (TREE_CODE (token
->u
.value
) == FIXED_CST
)
3579 error_at (token
->location
,
3580 "fixed-point types not supported in C++");
3581 return error_mark_node
;
3583 /* Floating-point literals are only allowed in an integral
3584 constant expression if they are cast to an integral or
3585 enumeration type. */
3586 if (TREE_CODE (token
->u
.value
) == REAL_CST
3587 && parser
->integral_constant_expression_p
3590 /* CAST_P will be set even in invalid code like "int(2.7 +
3591 ...)". Therefore, we have to check that the next token
3592 is sure to end the cast. */
3595 cp_token
*next_token
;
3597 next_token
= cp_lexer_peek_token (parser
->lexer
);
3598 if (/* The comma at the end of an
3599 enumerator-definition. */
3600 next_token
->type
!= CPP_COMMA
3601 /* The curly brace at the end of an enum-specifier. */
3602 && next_token
->type
!= CPP_CLOSE_BRACE
3603 /* The end of a statement. */
3604 && next_token
->type
!= CPP_SEMICOLON
3605 /* The end of the cast-expression. */
3606 && next_token
->type
!= CPP_CLOSE_PAREN
3607 /* The end of an array bound. */
3608 && next_token
->type
!= CPP_CLOSE_SQUARE
3609 /* The closing ">" in a template-argument-list. */
3610 && (next_token
->type
!= CPP_GREATER
3611 || parser
->greater_than_is_operator_p
)
3612 /* C++0x only: A ">>" treated like two ">" tokens,
3613 in a template-argument-list. */
3614 && (next_token
->type
!= CPP_RSHIFT
3615 || (cxx_dialect
== cxx98
)
3616 || parser
->greater_than_is_operator_p
))
3620 /* If we are within a cast, then the constraint that the
3621 cast is to an integral or enumeration type will be
3622 checked at that point. If we are not within a cast, then
3623 this code is invalid. */
3625 cp_parser_non_integral_constant_expression (parser
, NIC_FLOAT
);
3627 return token
->u
.value
;
3633 case CPP_UTF8STRING
:
3634 /* ??? Should wide strings be allowed when parser->translate_strings_p
3635 is false (i.e. in attributes)? If not, we can kill the third
3636 argument to cp_parser_string_literal. */
3637 return cp_parser_string_literal (parser
,
3638 parser
->translate_strings_p
,
3641 case CPP_OPEN_PAREN
:
3644 bool saved_greater_than_is_operator_p
;
3646 /* Consume the `('. */
3647 cp_lexer_consume_token (parser
->lexer
);
3648 /* Within a parenthesized expression, a `>' token is always
3649 the greater-than operator. */
3650 saved_greater_than_is_operator_p
3651 = parser
->greater_than_is_operator_p
;
3652 parser
->greater_than_is_operator_p
= true;
3653 /* If we see `( { ' then we are looking at the beginning of
3654 a GNU statement-expression. */
3655 if (cp_parser_allow_gnu_extensions_p (parser
)
3656 && cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
3658 /* Statement-expressions are not allowed by the standard. */
3659 pedwarn (token
->location
, OPT_pedantic
,
3660 "ISO C++ forbids braced-groups within expressions");
3662 /* And they're not allowed outside of a function-body; you
3663 cannot, for example, write:
3665 int i = ({ int j = 3; j + 1; });
3667 at class or namespace scope. */
3668 if (!parser
->in_function_body
3669 || parser
->in_template_argument_list_p
)
3671 error_at (token
->location
,
3672 "statement-expressions are not allowed outside "
3673 "functions nor in template-argument lists");
3674 cp_parser_skip_to_end_of_block_or_statement (parser
);
3675 expr
= error_mark_node
;
3679 /* Start the statement-expression. */
3680 expr
= begin_stmt_expr ();
3681 /* Parse the compound-statement. */
3682 cp_parser_compound_statement (parser
, expr
, false);
3684 expr
= finish_stmt_expr (expr
, false);
3689 /* Parse the parenthesized expression. */
3690 expr
= cp_parser_expression (parser
, cast_p
, idk
);
3691 /* Let the front end know that this expression was
3692 enclosed in parentheses. This matters in case, for
3693 example, the expression is of the form `A::B', since
3694 `&A::B' might be a pointer-to-member, but `&(A::B)' is
3696 finish_parenthesized_expr (expr
);
3698 /* The `>' token might be the end of a template-id or
3699 template-parameter-list now. */
3700 parser
->greater_than_is_operator_p
3701 = saved_greater_than_is_operator_p
;
3702 /* Consume the `)'. */
3703 if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
3704 cp_parser_skip_to_end_of_statement (parser
);
3709 case CPP_OPEN_SQUARE
:
3710 if (c_dialect_objc ())
3711 /* We have an Objective-C++ message. */
3712 return cp_parser_objc_expression (parser
);
3713 maybe_warn_cpp0x (CPP0X_LAMBDA_EXPR
);
3714 return cp_parser_lambda_expression (parser
);
3716 case CPP_OBJC_STRING
:
3717 if (c_dialect_objc ())
3718 /* We have an Objective-C++ string literal. */
3719 return cp_parser_objc_expression (parser
);
3720 cp_parser_error (parser
, "expected primary-expression");
3721 return error_mark_node
;
3724 switch (token
->keyword
)
3726 /* These two are the boolean literals. */
3728 cp_lexer_consume_token (parser
->lexer
);
3729 return boolean_true_node
;
3731 cp_lexer_consume_token (parser
->lexer
);
3732 return boolean_false_node
;
3734 /* The `__null' literal. */
3736 cp_lexer_consume_token (parser
->lexer
);
3739 /* The `nullptr' literal. */
3741 cp_lexer_consume_token (parser
->lexer
);
3742 return nullptr_node
;
3744 /* Recognize the `this' keyword. */
3746 cp_lexer_consume_token (parser
->lexer
);
3747 if (parser
->local_variables_forbidden_p
)
3749 error_at (token
->location
,
3750 "%<this%> may not be used in this context");
3751 return error_mark_node
;
3753 /* Pointers cannot appear in constant-expressions. */
3754 if (cp_parser_non_integral_constant_expression (parser
, NIC_THIS
))
3755 return error_mark_node
;
3756 return finish_this_expr ();
3758 /* The `operator' keyword can be the beginning of an
3763 case RID_FUNCTION_NAME
:
3764 case RID_PRETTY_FUNCTION_NAME
:
3765 case RID_C99_FUNCTION_NAME
:
3767 non_integral_constant name
;
3769 /* The symbols __FUNCTION__, __PRETTY_FUNCTION__, and
3770 __func__ are the names of variables -- but they are
3771 treated specially. Therefore, they are handled here,
3772 rather than relying on the generic id-expression logic
3773 below. Grammatically, these names are id-expressions.
3775 Consume the token. */
3776 token
= cp_lexer_consume_token (parser
->lexer
);
3778 switch (token
->keyword
)
3780 case RID_FUNCTION_NAME
:
3781 name
= NIC_FUNC_NAME
;
3783 case RID_PRETTY_FUNCTION_NAME
:
3784 name
= NIC_PRETTY_FUNC
;
3786 case RID_C99_FUNCTION_NAME
:
3787 name
= NIC_C99_FUNC
;
3793 if (cp_parser_non_integral_constant_expression (parser
, name
))
3794 return error_mark_node
;
3796 /* Look up the name. */
3797 return finish_fname (token
->u
.value
);
3805 /* The `__builtin_va_arg' construct is used to handle
3806 `va_arg'. Consume the `__builtin_va_arg' token. */
3807 cp_lexer_consume_token (parser
->lexer
);
3808 /* Look for the opening `('. */
3809 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
3810 /* Now, parse the assignment-expression. */
3811 expression
= cp_parser_assignment_expression (parser
,
3812 /*cast_p=*/false, NULL
);
3813 /* Look for the `,'. */
3814 cp_parser_require (parser
, CPP_COMMA
, RT_COMMA
);
3815 /* Parse the type-id. */
3816 type
= cp_parser_type_id (parser
);
3817 /* Look for the closing `)'. */
3818 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
3819 /* Using `va_arg' in a constant-expression is not
3821 if (cp_parser_non_integral_constant_expression (parser
,
3823 return error_mark_node
;
3824 return build_x_va_arg (expression
, type
);
3828 return cp_parser_builtin_offsetof (parser
);
3830 case RID_HAS_NOTHROW_ASSIGN
:
3831 case RID_HAS_NOTHROW_CONSTRUCTOR
:
3832 case RID_HAS_NOTHROW_COPY
:
3833 case RID_HAS_TRIVIAL_ASSIGN
:
3834 case RID_HAS_TRIVIAL_CONSTRUCTOR
:
3835 case RID_HAS_TRIVIAL_COPY
:
3836 case RID_HAS_TRIVIAL_DESTRUCTOR
:
3837 case RID_HAS_VIRTUAL_DESTRUCTOR
:
3838 case RID_IS_ABSTRACT
:
3839 case RID_IS_BASE_OF
:
3841 case RID_IS_CONVERTIBLE_TO
:
3845 case RID_IS_POLYMORPHIC
:
3846 case RID_IS_STD_LAYOUT
:
3847 case RID_IS_TRIVIAL
:
3849 case RID_IS_LITERAL_TYPE
:
3850 return cp_parser_trait_expr (parser
, token
->keyword
);
3852 /* Objective-C++ expressions. */
3854 case RID_AT_PROTOCOL
:
3855 case RID_AT_SELECTOR
:
3856 return cp_parser_objc_expression (parser
);
3859 if (parser
->in_function_body
3860 && (cp_lexer_peek_nth_token (parser
->lexer
, 2)->type
3863 error_at (token
->location
,
3864 "a template declaration cannot appear at block scope");
3865 cp_parser_skip_to_end_of_block_or_statement (parser
);
3866 return error_mark_node
;
3869 cp_parser_error (parser
, "expected primary-expression");
3870 return error_mark_node
;
3873 /* An id-expression can start with either an identifier, a
3874 `::' as the beginning of a qualified-id, or the "operator"
3878 case CPP_TEMPLATE_ID
:
3879 case CPP_NESTED_NAME_SPECIFIER
:
3883 const char *error_msg
;
3886 cp_token
*id_expr_token
;
3889 /* Parse the id-expression. */
3891 = cp_parser_id_expression (parser
,
3892 /*template_keyword_p=*/false,
3893 /*check_dependency_p=*/true,
3895 /*declarator_p=*/false,
3896 /*optional_p=*/false);
3897 if (id_expression
== error_mark_node
)
3898 return error_mark_node
;
3899 id_expr_token
= token
;
3900 token
= cp_lexer_peek_token (parser
->lexer
);
3901 done
= (token
->type
!= CPP_OPEN_SQUARE
3902 && token
->type
!= CPP_OPEN_PAREN
3903 && token
->type
!= CPP_DOT
3904 && token
->type
!= CPP_DEREF
3905 && token
->type
!= CPP_PLUS_PLUS
3906 && token
->type
!= CPP_MINUS_MINUS
);
3907 /* If we have a template-id, then no further lookup is
3908 required. If the template-id was for a template-class, we
3909 will sometimes have a TYPE_DECL at this point. */
3910 if (TREE_CODE (id_expression
) == TEMPLATE_ID_EXPR
3911 || TREE_CODE (id_expression
) == TYPE_DECL
)
3912 decl
= id_expression
;
3913 /* Look up the name. */
3916 tree ambiguous_decls
;
3918 /* If we already know that this lookup is ambiguous, then
3919 we've already issued an error message; there's no reason
3921 if (id_expr_token
->type
== CPP_NAME
3922 && id_expr_token
->ambiguous_p
)
3924 cp_parser_simulate_error (parser
);
3925 return error_mark_node
;
3928 decl
= cp_parser_lookup_name (parser
, id_expression
,
3931 /*is_namespace=*/false,
3932 /*check_dependency=*/true,
3934 id_expr_token
->location
);
3935 /* If the lookup was ambiguous, an error will already have
3937 if (ambiguous_decls
)
3938 return error_mark_node
;
3940 /* In Objective-C++, we may have an Objective-C 2.0
3941 dot-syntax for classes here. */
3942 if (c_dialect_objc ()
3943 && cp_lexer_peek_token (parser
->lexer
)->type
== CPP_DOT
3944 && TREE_CODE (decl
) == TYPE_DECL
3945 && objc_is_class_name (decl
))
3948 cp_lexer_consume_token (parser
->lexer
);
3949 component
= cp_parser_identifier (parser
);
3950 if (component
== error_mark_node
)
3951 return error_mark_node
;
3953 return objc_build_class_component_ref (id_expression
, component
);
3956 /* In Objective-C++, an instance variable (ivar) may be preferred
3957 to whatever cp_parser_lookup_name() found. */
3958 decl
= objc_lookup_ivar (decl
, id_expression
);
3960 /* If name lookup gives us a SCOPE_REF, then the
3961 qualifying scope was dependent. */
3962 if (TREE_CODE (decl
) == SCOPE_REF
)
3964 /* At this point, we do not know if DECL is a valid
3965 integral constant expression. We assume that it is
3966 in fact such an expression, so that code like:
3968 template <int N> struct A {
3972 is accepted. At template-instantiation time, we
3973 will check that B<N>::i is actually a constant. */
3976 /* Check to see if DECL is a local variable in a context
3977 where that is forbidden. */
3978 if (parser
->local_variables_forbidden_p
3979 && local_variable_p (decl
))
3981 /* It might be that we only found DECL because we are
3982 trying to be generous with pre-ISO scoping rules.
3983 For example, consider:
3987 for (int i = 0; i < 10; ++i) {}
3988 extern void f(int j = i);
3991 Here, name look up will originally find the out
3992 of scope `i'. We need to issue a warning message,
3993 but then use the global `i'. */
3994 decl
= check_for_out_of_scope_variable (decl
);
3995 if (local_variable_p (decl
))
3997 error_at (id_expr_token
->location
,
3998 "local variable %qD may not appear in this context",
4000 return error_mark_node
;
4005 decl
= (finish_id_expression
4006 (id_expression
, decl
, parser
->scope
,
4008 parser
->integral_constant_expression_p
,
4009 parser
->allow_non_integral_constant_expression_p
,
4010 &parser
->non_integral_constant_expression_p
,
4011 template_p
, done
, address_p
,
4014 id_expr_token
->location
));
4016 cp_parser_error (parser
, error_msg
);
4020 /* Anything else is an error. */
4022 cp_parser_error (parser
, "expected primary-expression");
4023 return error_mark_node
;
4027 /* Parse an id-expression.
4034 :: [opt] nested-name-specifier template [opt] unqualified-id
4036 :: operator-function-id
4039 Return a representation of the unqualified portion of the
4040 identifier. Sets PARSER->SCOPE to the qualifying scope if there is
4041 a `::' or nested-name-specifier.
4043 Often, if the id-expression was a qualified-id, the caller will
4044 want to make a SCOPE_REF to represent the qualified-id. This
4045 function does not do this in order to avoid wastefully creating
4046 SCOPE_REFs when they are not required.
4048 If TEMPLATE_KEYWORD_P is true, then we have just seen the
4051 If CHECK_DEPENDENCY_P is false, then names are looked up inside
4052 uninstantiated templates.
4054 If *TEMPLATE_P is non-NULL, it is set to true iff the
4055 `template' keyword is used to explicitly indicate that the entity
4056 named is a template.
4058 If DECLARATOR_P is true, the id-expression is appearing as part of
4059 a declarator, rather than as part of an expression. */
4062 cp_parser_id_expression (cp_parser
*parser
,
4063 bool template_keyword_p
,
4064 bool check_dependency_p
,
4069 bool global_scope_p
;
4070 bool nested_name_specifier_p
;
4072 /* Assume the `template' keyword was not used. */
4074 *template_p
= template_keyword_p
;
4076 /* Look for the optional `::' operator. */
4078 = (cp_parser_global_scope_opt (parser
, /*current_scope_valid_p=*/false)
4080 /* Look for the optional nested-name-specifier. */
4081 nested_name_specifier_p
4082 = (cp_parser_nested_name_specifier_opt (parser
,
4083 /*typename_keyword_p=*/false,
4088 /* If there is a nested-name-specifier, then we are looking at
4089 the first qualified-id production. */
4090 if (nested_name_specifier_p
)
4093 tree saved_object_scope
;
4094 tree saved_qualifying_scope
;
4095 tree unqualified_id
;
4098 /* See if the next token is the `template' keyword. */
4100 template_p
= &is_template
;
4101 *template_p
= cp_parser_optional_template_keyword (parser
);
4102 /* Name lookup we do during the processing of the
4103 unqualified-id might obliterate SCOPE. */
4104 saved_scope
= parser
->scope
;
4105 saved_object_scope
= parser
->object_scope
;
4106 saved_qualifying_scope
= parser
->qualifying_scope
;
4107 /* Process the final unqualified-id. */
4108 unqualified_id
= cp_parser_unqualified_id (parser
, *template_p
,
4111 /*optional_p=*/false);
4112 /* Restore the SAVED_SCOPE for our caller. */
4113 parser
->scope
= saved_scope
;
4114 parser
->object_scope
= saved_object_scope
;
4115 parser
->qualifying_scope
= saved_qualifying_scope
;
4117 return unqualified_id
;
4119 /* Otherwise, if we are in global scope, then we are looking at one
4120 of the other qualified-id productions. */
4121 else if (global_scope_p
)
4126 /* Peek at the next token. */
4127 token
= cp_lexer_peek_token (parser
->lexer
);
4129 /* If it's an identifier, and the next token is not a "<", then
4130 we can avoid the template-id case. This is an optimization
4131 for this common case. */
4132 if (token
->type
== CPP_NAME
4133 && !cp_parser_nth_token_starts_template_argument_list_p
4135 return cp_parser_identifier (parser
);
4137 cp_parser_parse_tentatively (parser
);
4138 /* Try a template-id. */
4139 id
= cp_parser_template_id (parser
,
4140 /*template_keyword_p=*/false,
4141 /*check_dependency_p=*/true,
4143 /* If that worked, we're done. */
4144 if (cp_parser_parse_definitely (parser
))
4147 /* Peek at the next token. (Changes in the token buffer may
4148 have invalidated the pointer obtained above.) */
4149 token
= cp_lexer_peek_token (parser
->lexer
);
4151 switch (token
->type
)
4154 return cp_parser_identifier (parser
);
4157 if (token
->keyword
== RID_OPERATOR
)
4158 return cp_parser_operator_function_id (parser
);
4162 cp_parser_error (parser
, "expected id-expression");
4163 return error_mark_node
;
4167 return cp_parser_unqualified_id (parser
, template_keyword_p
,
4168 /*check_dependency_p=*/true,
4173 /* Parse an unqualified-id.
4177 operator-function-id
4178 conversion-function-id
4182 If TEMPLATE_KEYWORD_P is TRUE, we have just seen the `template'
4183 keyword, in a construct like `A::template ...'.
4185 Returns a representation of unqualified-id. For the `identifier'
4186 production, an IDENTIFIER_NODE is returned. For the `~ class-name'
4187 production a BIT_NOT_EXPR is returned; the operand of the
4188 BIT_NOT_EXPR is an IDENTIFIER_NODE for the class-name. For the
4189 other productions, see the documentation accompanying the
4190 corresponding parsing functions. If CHECK_DEPENDENCY_P is false,
4191 names are looked up in uninstantiated templates. If DECLARATOR_P
4192 is true, the unqualified-id is appearing as part of a declarator,
4193 rather than as part of an expression. */
4196 cp_parser_unqualified_id (cp_parser
* parser
,
4197 bool template_keyword_p
,
4198 bool check_dependency_p
,
4204 /* Peek at the next token. */
4205 token
= cp_lexer_peek_token (parser
->lexer
);
4207 switch (token
->type
)
4213 /* We don't know yet whether or not this will be a
4215 cp_parser_parse_tentatively (parser
);
4216 /* Try a template-id. */
4217 id
= cp_parser_template_id (parser
, template_keyword_p
,
4220 /* If it worked, we're done. */
4221 if (cp_parser_parse_definitely (parser
))
4223 /* Otherwise, it's an ordinary identifier. */
4224 return cp_parser_identifier (parser
);
4227 case CPP_TEMPLATE_ID
:
4228 return cp_parser_template_id (parser
, template_keyword_p
,
4235 tree qualifying_scope
;
4240 /* Consume the `~' token. */
4241 cp_lexer_consume_token (parser
->lexer
);
4242 /* Parse the class-name. The standard, as written, seems to
4245 template <typename T> struct S { ~S (); };
4246 template <typename T> S<T>::~S() {}
4248 is invalid, since `~' must be followed by a class-name, but
4249 `S<T>' is dependent, and so not known to be a class.
4250 That's not right; we need to look in uninstantiated
4251 templates. A further complication arises from:
4253 template <typename T> void f(T t) {
4257 Here, it is not possible to look up `T' in the scope of `T'
4258 itself. We must look in both the current scope, and the
4259 scope of the containing complete expression.
4261 Yet another issue is:
4270 The standard does not seem to say that the `S' in `~S'
4271 should refer to the type `S' and not the data member
4274 /* DR 244 says that we look up the name after the "~" in the
4275 same scope as we looked up the qualifying name. That idea
4276 isn't fully worked out; it's more complicated than that. */
4277 scope
= parser
->scope
;
4278 object_scope
= parser
->object_scope
;
4279 qualifying_scope
= parser
->qualifying_scope
;
4281 /* Check for invalid scopes. */
4282 if (scope
== error_mark_node
)
4284 if (cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
))
4285 cp_lexer_consume_token (parser
->lexer
);
4286 return error_mark_node
;
4288 if (scope
&& TREE_CODE (scope
) == NAMESPACE_DECL
)
4290 if (!cp_parser_uncommitted_to_tentative_parse_p (parser
))
4291 error_at (token
->location
,
4292 "scope %qT before %<~%> is not a class-name",
4294 cp_parser_simulate_error (parser
);
4295 if (cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
))
4296 cp_lexer_consume_token (parser
->lexer
);
4297 return error_mark_node
;
4299 gcc_assert (!scope
|| TYPE_P (scope
));
4301 /* If the name is of the form "X::~X" it's OK even if X is a
4303 token
= cp_lexer_peek_token (parser
->lexer
);
4305 && token
->type
== CPP_NAME
4306 && (cp_lexer_peek_nth_token (parser
->lexer
, 2)->type
4308 && (token
->u
.value
== TYPE_IDENTIFIER (scope
)
4309 || constructor_name_p (token
->u
.value
, scope
)))
4311 cp_lexer_consume_token (parser
->lexer
);
4312 return build_nt (BIT_NOT_EXPR
, scope
);
4315 /* If there was an explicit qualification (S::~T), first look
4316 in the scope given by the qualification (i.e., S).
4318 Note: in the calls to cp_parser_class_name below we pass
4319 typename_type so that lookup finds the injected-class-name
4320 rather than the constructor. */
4322 type_decl
= NULL_TREE
;
4325 cp_parser_parse_tentatively (parser
);
4326 type_decl
= cp_parser_class_name (parser
,
4327 /*typename_keyword_p=*/false,
4328 /*template_keyword_p=*/false,
4330 /*check_dependency=*/false,
4331 /*class_head_p=*/false,
4333 if (cp_parser_parse_definitely (parser
))
4336 /* In "N::S::~S", look in "N" as well. */
4337 if (!done
&& scope
&& qualifying_scope
)
4339 cp_parser_parse_tentatively (parser
);
4340 parser
->scope
= qualifying_scope
;
4341 parser
->object_scope
= NULL_TREE
;
4342 parser
->qualifying_scope
= NULL_TREE
;
4344 = cp_parser_class_name (parser
,
4345 /*typename_keyword_p=*/false,
4346 /*template_keyword_p=*/false,
4348 /*check_dependency=*/false,
4349 /*class_head_p=*/false,
4351 if (cp_parser_parse_definitely (parser
))
4354 /* In "p->S::~T", look in the scope given by "*p" as well. */
4355 else if (!done
&& object_scope
)
4357 cp_parser_parse_tentatively (parser
);
4358 parser
->scope
= object_scope
;
4359 parser
->object_scope
= NULL_TREE
;
4360 parser
->qualifying_scope
= NULL_TREE
;
4362 = cp_parser_class_name (parser
,
4363 /*typename_keyword_p=*/false,
4364 /*template_keyword_p=*/false,
4366 /*check_dependency=*/false,
4367 /*class_head_p=*/false,
4369 if (cp_parser_parse_definitely (parser
))
4372 /* Look in the surrounding context. */
4375 parser
->scope
= NULL_TREE
;
4376 parser
->object_scope
= NULL_TREE
;
4377 parser
->qualifying_scope
= NULL_TREE
;
4378 if (processing_template_decl
)
4379 cp_parser_parse_tentatively (parser
);
4381 = cp_parser_class_name (parser
,
4382 /*typename_keyword_p=*/false,
4383 /*template_keyword_p=*/false,
4385 /*check_dependency=*/false,
4386 /*class_head_p=*/false,
4388 if (processing_template_decl
4389 && ! cp_parser_parse_definitely (parser
))
4391 /* We couldn't find a type with this name, so just accept
4392 it and check for a match at instantiation time. */
4393 type_decl
= cp_parser_identifier (parser
);
4394 if (type_decl
!= error_mark_node
)
4395 type_decl
= build_nt (BIT_NOT_EXPR
, type_decl
);
4399 /* If an error occurred, assume that the name of the
4400 destructor is the same as the name of the qualifying
4401 class. That allows us to keep parsing after running
4402 into ill-formed destructor names. */
4403 if (type_decl
== error_mark_node
&& scope
)
4404 return build_nt (BIT_NOT_EXPR
, scope
);
4405 else if (type_decl
== error_mark_node
)
4406 return error_mark_node
;
4408 /* Check that destructor name and scope match. */
4409 if (declarator_p
&& scope
&& !check_dtor_name (scope
, type_decl
))
4411 if (!cp_parser_uncommitted_to_tentative_parse_p (parser
))
4412 error_at (token
->location
,
4413 "declaration of %<~%T%> as member of %qT",
4415 cp_parser_simulate_error (parser
);
4416 return error_mark_node
;
4421 A typedef-name that names a class shall not be used as the
4422 identifier in the declarator for a destructor declaration. */
4424 && !DECL_IMPLICIT_TYPEDEF_P (type_decl
)
4425 && !DECL_SELF_REFERENCE_P (type_decl
)
4426 && !cp_parser_uncommitted_to_tentative_parse_p (parser
))
4427 error_at (token
->location
,
4428 "typedef-name %qD used as destructor declarator",
4431 return build_nt (BIT_NOT_EXPR
, TREE_TYPE (type_decl
));
4435 if (token
->keyword
== RID_OPERATOR
)
4439 /* This could be a template-id, so we try that first. */
4440 cp_parser_parse_tentatively (parser
);
4441 /* Try a template-id. */
4442 id
= cp_parser_template_id (parser
, template_keyword_p
,
4443 /*check_dependency_p=*/true,
4445 /* If that worked, we're done. */
4446 if (cp_parser_parse_definitely (parser
))
4448 /* We still don't know whether we're looking at an
4449 operator-function-id or a conversion-function-id. */
4450 cp_parser_parse_tentatively (parser
);
4451 /* Try an operator-function-id. */
4452 id
= cp_parser_operator_function_id (parser
);
4453 /* If that didn't work, try a conversion-function-id. */
4454 if (!cp_parser_parse_definitely (parser
))
4455 id
= cp_parser_conversion_function_id (parser
);
4464 cp_parser_error (parser
, "expected unqualified-id");
4465 return error_mark_node
;
4469 /* Parse an (optional) nested-name-specifier.
4471 nested-name-specifier: [C++98]
4472 class-or-namespace-name :: nested-name-specifier [opt]
4473 class-or-namespace-name :: template nested-name-specifier [opt]
4475 nested-name-specifier: [C++0x]
4478 nested-name-specifier identifier ::
4479 nested-name-specifier template [opt] simple-template-id ::
4481 PARSER->SCOPE should be set appropriately before this function is
4482 called. TYPENAME_KEYWORD_P is TRUE if the `typename' keyword is in
4483 effect. TYPE_P is TRUE if we non-type bindings should be ignored
4486 Sets PARSER->SCOPE to the class (TYPE) or namespace
4487 (NAMESPACE_DECL) specified by the nested-name-specifier, or leaves
4488 it unchanged if there is no nested-name-specifier. Returns the new
4489 scope iff there is a nested-name-specifier, or NULL_TREE otherwise.
4491 If IS_DECLARATION is TRUE, the nested-name-specifier is known to be
4492 part of a declaration and/or decl-specifier. */
4495 cp_parser_nested_name_specifier_opt (cp_parser
*parser
,
4496 bool typename_keyword_p
,
4497 bool check_dependency_p
,
4499 bool is_declaration
)
4501 bool success
= false;
4502 cp_token_position start
= 0;
4505 /* Remember where the nested-name-specifier starts. */
4506 if (cp_parser_uncommitted_to_tentative_parse_p (parser
))
4508 start
= cp_lexer_token_position (parser
->lexer
, false);
4509 push_deferring_access_checks (dk_deferred
);
4516 tree saved_qualifying_scope
;
4517 bool template_keyword_p
;
4519 /* Spot cases that cannot be the beginning of a
4520 nested-name-specifier. */
4521 token
= cp_lexer_peek_token (parser
->lexer
);
4523 /* If the next token is CPP_NESTED_NAME_SPECIFIER, just process
4524 the already parsed nested-name-specifier. */
4525 if (token
->type
== CPP_NESTED_NAME_SPECIFIER
)
4527 /* Grab the nested-name-specifier and continue the loop. */
4528 cp_parser_pre_parsed_nested_name_specifier (parser
);
4529 /* If we originally encountered this nested-name-specifier
4530 with IS_DECLARATION set to false, we will not have
4531 resolved TYPENAME_TYPEs, so we must do so here. */
4533 && TREE_CODE (parser
->scope
) == TYPENAME_TYPE
)
4535 new_scope
= resolve_typename_type (parser
->scope
,
4536 /*only_current_p=*/false);
4537 if (TREE_CODE (new_scope
) != TYPENAME_TYPE
)
4538 parser
->scope
= new_scope
;
4544 /* Spot cases that cannot be the beginning of a
4545 nested-name-specifier. On the second and subsequent times
4546 through the loop, we look for the `template' keyword. */
4547 if (success
&& token
->keyword
== RID_TEMPLATE
)
4549 /* A template-id can start a nested-name-specifier. */
4550 else if (token
->type
== CPP_TEMPLATE_ID
)
4554 /* If the next token is not an identifier, then it is
4555 definitely not a type-name or namespace-name. */
4556 if (token
->type
!= CPP_NAME
)
4558 /* If the following token is neither a `<' (to begin a
4559 template-id), nor a `::', then we are not looking at a
4560 nested-name-specifier. */
4561 token
= cp_lexer_peek_nth_token (parser
->lexer
, 2);
4563 if (token
->type
== CPP_COLON
4564 && parser
->colon_corrects_to_scope_p
4565 && cp_lexer_peek_nth_token (parser
->lexer
, 3)->type
== CPP_NAME
)
4567 error_at (token
->location
,
4568 "found %<:%> in nested-name-specifier, expected %<::%>");
4569 token
->type
= CPP_SCOPE
;
4572 if (token
->type
!= CPP_SCOPE
4573 && !cp_parser_nth_token_starts_template_argument_list_p
4578 /* The nested-name-specifier is optional, so we parse
4580 cp_parser_parse_tentatively (parser
);
4582 /* Look for the optional `template' keyword, if this isn't the
4583 first time through the loop. */
4585 template_keyword_p
= cp_parser_optional_template_keyword (parser
);
4587 template_keyword_p
= false;
4589 /* Save the old scope since the name lookup we are about to do
4590 might destroy it. */
4591 old_scope
= parser
->scope
;
4592 saved_qualifying_scope
= parser
->qualifying_scope
;
4593 /* In a declarator-id like "X<T>::I::Y<T>" we must be able to
4594 look up names in "X<T>::I" in order to determine that "Y" is
4595 a template. So, if we have a typename at this point, we make
4596 an effort to look through it. */
4598 && !typename_keyword_p
4600 && TREE_CODE (parser
->scope
) == TYPENAME_TYPE
)
4601 parser
->scope
= resolve_typename_type (parser
->scope
,
4602 /*only_current_p=*/false);
4603 /* Parse the qualifying entity. */
4605 = cp_parser_qualifying_entity (parser
,
4611 /* Look for the `::' token. */
4612 cp_parser_require (parser
, CPP_SCOPE
, RT_SCOPE
);
4614 /* If we found what we wanted, we keep going; otherwise, we're
4616 if (!cp_parser_parse_definitely (parser
))
4618 bool error_p
= false;
4620 /* Restore the OLD_SCOPE since it was valid before the
4621 failed attempt at finding the last
4622 class-or-namespace-name. */
4623 parser
->scope
= old_scope
;
4624 parser
->qualifying_scope
= saved_qualifying_scope
;
4625 if (cp_parser_uncommitted_to_tentative_parse_p (parser
))
4627 /* If the next token is an identifier, and the one after
4628 that is a `::', then any valid interpretation would have
4629 found a class-or-namespace-name. */
4630 while (cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
)
4631 && (cp_lexer_peek_nth_token (parser
->lexer
, 2)->type
4633 && (cp_lexer_peek_nth_token (parser
->lexer
, 3)->type
4636 token
= cp_lexer_consume_token (parser
->lexer
);
4639 if (!token
->ambiguous_p
)
4642 tree ambiguous_decls
;
4644 decl
= cp_parser_lookup_name (parser
, token
->u
.value
,
4646 /*is_template=*/false,
4647 /*is_namespace=*/false,
4648 /*check_dependency=*/true,
4651 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
4652 error_at (token
->location
,
4653 "%qD used without template parameters",
4655 else if (ambiguous_decls
)
4657 error_at (token
->location
,
4658 "reference to %qD is ambiguous",
4660 print_candidates (ambiguous_decls
);
4661 decl
= error_mark_node
;
4665 if (cxx_dialect
!= cxx98
)
4666 cp_parser_name_lookup_error
4667 (parser
, token
->u
.value
, decl
, NLE_NOT_CXX98
,
4670 cp_parser_name_lookup_error
4671 (parser
, token
->u
.value
, decl
, NLE_CXX98
,
4675 parser
->scope
= error_mark_node
;
4677 /* Treat this as a successful nested-name-specifier
4682 If the name found is not a class-name (clause
4683 _class_) or namespace-name (_namespace.def_), the
4684 program is ill-formed. */
4687 cp_lexer_consume_token (parser
->lexer
);
4691 /* We've found one valid nested-name-specifier. */
4693 /* Name lookup always gives us a DECL. */
4694 if (TREE_CODE (new_scope
) == TYPE_DECL
)
4695 new_scope
= TREE_TYPE (new_scope
);
4696 /* Uses of "template" must be followed by actual templates. */
4697 if (template_keyword_p
4698 && !(CLASS_TYPE_P (new_scope
)
4699 && ((CLASSTYPE_USE_TEMPLATE (new_scope
)
4700 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (new_scope
)))
4701 || CLASSTYPE_IS_TEMPLATE (new_scope
)))
4702 && !(TREE_CODE (new_scope
) == TYPENAME_TYPE
4703 && (TREE_CODE (TYPENAME_TYPE_FULLNAME (new_scope
))
4704 == TEMPLATE_ID_EXPR
)))
4705 permerror (input_location
, TYPE_P (new_scope
)
4706 ? "%qT is not a template"
4707 : "%qD is not a template",
4709 /* If it is a class scope, try to complete it; we are about to
4710 be looking up names inside the class. */
4711 if (TYPE_P (new_scope
)
4712 /* Since checking types for dependency can be expensive,
4713 avoid doing it if the type is already complete. */
4714 && !COMPLETE_TYPE_P (new_scope
)
4715 /* Do not try to complete dependent types. */
4716 && !dependent_type_p (new_scope
))
4718 new_scope
= complete_type (new_scope
);
4719 /* If it is a typedef to current class, use the current
4720 class instead, as the typedef won't have any names inside
4722 if (!COMPLETE_TYPE_P (new_scope
)
4723 && currently_open_class (new_scope
))
4724 new_scope
= TYPE_MAIN_VARIANT (new_scope
);
4726 /* Make sure we look in the right scope the next time through
4728 parser
->scope
= new_scope
;
4731 /* If parsing tentatively, replace the sequence of tokens that makes
4732 up the nested-name-specifier with a CPP_NESTED_NAME_SPECIFIER
4733 token. That way, should we re-parse the token stream, we will
4734 not have to repeat the effort required to do the parse, nor will
4735 we issue duplicate error messages. */
4736 if (success
&& start
)
4740 token
= cp_lexer_token_at (parser
->lexer
, start
);
4741 /* Reset the contents of the START token. */
4742 token
->type
= CPP_NESTED_NAME_SPECIFIER
;
4743 /* Retrieve any deferred checks. Do not pop this access checks yet
4744 so the memory will not be reclaimed during token replacing below. */
4745 token
->u
.tree_check_value
= ggc_alloc_cleared_tree_check ();
4746 token
->u
.tree_check_value
->value
= parser
->scope
;
4747 token
->u
.tree_check_value
->checks
= get_deferred_access_checks ();
4748 token
->u
.tree_check_value
->qualifying_scope
=
4749 parser
->qualifying_scope
;
4750 token
->keyword
= RID_MAX
;
4752 /* Purge all subsequent tokens. */
4753 cp_lexer_purge_tokens_after (parser
->lexer
, start
);
4757 pop_to_parent_deferring_access_checks ();
4759 return success
? parser
->scope
: NULL_TREE
;
4762 /* Parse a nested-name-specifier. See
4763 cp_parser_nested_name_specifier_opt for details. This function
4764 behaves identically, except that it will an issue an error if no
4765 nested-name-specifier is present. */
4768 cp_parser_nested_name_specifier (cp_parser
*parser
,
4769 bool typename_keyword_p
,
4770 bool check_dependency_p
,
4772 bool is_declaration
)
4776 /* Look for the nested-name-specifier. */
4777 scope
= cp_parser_nested_name_specifier_opt (parser
,
4782 /* If it was not present, issue an error message. */
4785 cp_parser_error (parser
, "expected nested-name-specifier");
4786 parser
->scope
= NULL_TREE
;
4792 /* Parse the qualifying entity in a nested-name-specifier. For C++98,
4793 this is either a class-name or a namespace-name (which corresponds
4794 to the class-or-namespace-name production in the grammar). For
4795 C++0x, it can also be a type-name that refers to an enumeration
4798 TYPENAME_KEYWORD_P is TRUE iff the `typename' keyword is in effect.
4799 TEMPLATE_KEYWORD_P is TRUE iff the `template' keyword is in effect.
4800 CHECK_DEPENDENCY_P is FALSE iff dependent names should be looked up.
4801 TYPE_P is TRUE iff the next name should be taken as a class-name,
4802 even the same name is declared to be another entity in the same
4805 Returns the class (TYPE_DECL) or namespace (NAMESPACE_DECL)
4806 specified by the class-or-namespace-name. If neither is found the
4807 ERROR_MARK_NODE is returned. */
4810 cp_parser_qualifying_entity (cp_parser
*parser
,
4811 bool typename_keyword_p
,
4812 bool template_keyword_p
,
4813 bool check_dependency_p
,
4815 bool is_declaration
)
4818 tree saved_qualifying_scope
;
4819 tree saved_object_scope
;
4822 bool successful_parse_p
;
4824 /* Before we try to parse the class-name, we must save away the
4825 current PARSER->SCOPE since cp_parser_class_name will destroy
4827 saved_scope
= parser
->scope
;
4828 saved_qualifying_scope
= parser
->qualifying_scope
;
4829 saved_object_scope
= parser
->object_scope
;
4830 /* Try for a class-name first. If the SAVED_SCOPE is a type, then
4831 there is no need to look for a namespace-name. */
4832 only_class_p
= template_keyword_p
4833 || (saved_scope
&& TYPE_P (saved_scope
) && cxx_dialect
== cxx98
);
4835 cp_parser_parse_tentatively (parser
);
4836 scope
= cp_parser_class_name (parser
,
4839 type_p
? class_type
: none_type
,
4841 /*class_head_p=*/false,
4843 successful_parse_p
= only_class_p
|| cp_parser_parse_definitely (parser
);
4844 /* If that didn't work and we're in C++0x mode, try for a type-name. */
4846 && cxx_dialect
!= cxx98
4847 && !successful_parse_p
)
4849 /* Restore the saved scope. */
4850 parser
->scope
= saved_scope
;
4851 parser
->qualifying_scope
= saved_qualifying_scope
;
4852 parser
->object_scope
= saved_object_scope
;
4854 /* Parse tentatively. */
4855 cp_parser_parse_tentatively (parser
);
4857 /* Parse a typedef-name or enum-name. */
4858 scope
= cp_parser_nonclass_name (parser
);
4860 /* "If the name found does not designate a namespace or a class,
4861 enumeration, or dependent type, the program is ill-formed."
4863 We cover classes and dependent types above and namespaces below,
4864 so this code is only looking for enums. */
4865 if (!scope
|| TREE_CODE (scope
) != TYPE_DECL
4866 || TREE_CODE (TREE_TYPE (scope
)) != ENUMERAL_TYPE
)
4867 cp_parser_simulate_error (parser
);
4869 successful_parse_p
= cp_parser_parse_definitely (parser
);
4871 /* If that didn't work, try for a namespace-name. */
4872 if (!only_class_p
&& !successful_parse_p
)
4874 /* Restore the saved scope. */
4875 parser
->scope
= saved_scope
;
4876 parser
->qualifying_scope
= saved_qualifying_scope
;
4877 parser
->object_scope
= saved_object_scope
;
4878 /* If we are not looking at an identifier followed by the scope
4879 resolution operator, then this is not part of a
4880 nested-name-specifier. (Note that this function is only used
4881 to parse the components of a nested-name-specifier.) */
4882 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_NAME
)
4883 || cp_lexer_peek_nth_token (parser
->lexer
, 2)->type
!= CPP_SCOPE
)
4884 return error_mark_node
;
4885 scope
= cp_parser_namespace_name (parser
);
4891 /* Parse a postfix-expression.
4895 postfix-expression [ expression ]
4896 postfix-expression ( expression-list [opt] )
4897 simple-type-specifier ( expression-list [opt] )
4898 typename :: [opt] nested-name-specifier identifier
4899 ( expression-list [opt] )
4900 typename :: [opt] nested-name-specifier template [opt] template-id
4901 ( expression-list [opt] )
4902 postfix-expression . template [opt] id-expression
4903 postfix-expression -> template [opt] id-expression
4904 postfix-expression . pseudo-destructor-name
4905 postfix-expression -> pseudo-destructor-name
4906 postfix-expression ++
4907 postfix-expression --
4908 dynamic_cast < type-id > ( expression )
4909 static_cast < type-id > ( expression )
4910 reinterpret_cast < type-id > ( expression )
4911 const_cast < type-id > ( expression )
4912 typeid ( expression )
4918 ( type-id ) { initializer-list , [opt] }
4920 This extension is a GNU version of the C99 compound-literal
4921 construct. (The C99 grammar uses `type-name' instead of `type-id',
4922 but they are essentially the same concept.)
4924 If ADDRESS_P is true, the postfix expression is the operand of the
4925 `&' operator. CAST_P is true if this expression is the target of a
4928 If MEMBER_ACCESS_ONLY_P, we only allow postfix expressions that are
4929 class member access expressions [expr.ref].
4931 Returns a representation of the expression. */
4934 cp_parser_postfix_expression (cp_parser
*parser
, bool address_p
, bool cast_p
,
4935 bool member_access_only_p
,
4936 cp_id_kind
* pidk_return
)
4940 cp_id_kind idk
= CP_ID_KIND_NONE
;
4941 tree postfix_expression
= NULL_TREE
;
4942 bool is_member_access
= false;
4944 /* Peek at the next token. */
4945 token
= cp_lexer_peek_token (parser
->lexer
);
4946 /* Some of the productions are determined by keywords. */
4947 keyword
= token
->keyword
;
4957 const char *saved_message
;
4959 /* All of these can be handled in the same way from the point
4960 of view of parsing. Begin by consuming the token
4961 identifying the cast. */
4962 cp_lexer_consume_token (parser
->lexer
);
4964 /* New types cannot be defined in the cast. */
4965 saved_message
= parser
->type_definition_forbidden_message
;
4966 parser
->type_definition_forbidden_message
4967 = G_("types may not be defined in casts");
4969 /* Look for the opening `<'. */
4970 cp_parser_require (parser
, CPP_LESS
, RT_LESS
);
4971 /* Parse the type to which we are casting. */
4972 type
= cp_parser_type_id (parser
);
4973 /* Look for the closing `>'. */
4974 cp_parser_require (parser
, CPP_GREATER
, RT_GREATER
);
4975 /* Restore the old message. */
4976 parser
->type_definition_forbidden_message
= saved_message
;
4978 /* And the expression which is being cast. */
4979 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
4980 expression
= cp_parser_expression (parser
, /*cast_p=*/true, & idk
);
4981 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
4983 /* Only type conversions to integral or enumeration types
4984 can be used in constant-expressions. */
4985 if (!cast_valid_in_integral_constant_expression_p (type
)
4986 && cp_parser_non_integral_constant_expression (parser
, NIC_CAST
))
4987 return error_mark_node
;
4993 = build_dynamic_cast (type
, expression
, tf_warning_or_error
);
4997 = build_static_cast (type
, expression
, tf_warning_or_error
);
5001 = build_reinterpret_cast (type
, expression
,
5002 tf_warning_or_error
);
5006 = build_const_cast (type
, expression
, tf_warning_or_error
);
5017 const char *saved_message
;
5018 bool saved_in_type_id_in_expr_p
;
5020 /* Consume the `typeid' token. */
5021 cp_lexer_consume_token (parser
->lexer
);
5022 /* Look for the `(' token. */
5023 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
5024 /* Types cannot be defined in a `typeid' expression. */
5025 saved_message
= parser
->type_definition_forbidden_message
;
5026 parser
->type_definition_forbidden_message
5027 = G_("types may not be defined in a %<typeid%> expression");
5028 /* We can't be sure yet whether we're looking at a type-id or an
5030 cp_parser_parse_tentatively (parser
);
5031 /* Try a type-id first. */
5032 saved_in_type_id_in_expr_p
= parser
->in_type_id_in_expr_p
;
5033 parser
->in_type_id_in_expr_p
= true;
5034 type
= cp_parser_type_id (parser
);
5035 parser
->in_type_id_in_expr_p
= saved_in_type_id_in_expr_p
;
5036 /* Look for the `)' token. Otherwise, we can't be sure that
5037 we're not looking at an expression: consider `typeid (int
5038 (3))', for example. */
5039 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
5040 /* If all went well, simply lookup the type-id. */
5041 if (cp_parser_parse_definitely (parser
))
5042 postfix_expression
= get_typeid (type
);
5043 /* Otherwise, fall back to the expression variant. */
5048 /* Look for an expression. */
5049 expression
= cp_parser_expression (parser
, /*cast_p=*/false, & idk
);
5050 /* Compute its typeid. */
5051 postfix_expression
= build_typeid (expression
);
5052 /* Look for the `)' token. */
5053 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
5055 /* Restore the saved message. */
5056 parser
->type_definition_forbidden_message
= saved_message
;
5057 /* `typeid' may not appear in an integral constant expression. */
5058 if (cp_parser_non_integral_constant_expression(parser
, NIC_TYPEID
))
5059 return error_mark_node
;
5066 /* The syntax permitted here is the same permitted for an
5067 elaborated-type-specifier. */
5068 type
= cp_parser_elaborated_type_specifier (parser
,
5069 /*is_friend=*/false,
5070 /*is_declaration=*/false);
5071 postfix_expression
= cp_parser_functional_cast (parser
, type
);
5079 /* If the next thing is a simple-type-specifier, we may be
5080 looking at a functional cast. We could also be looking at
5081 an id-expression. So, we try the functional cast, and if
5082 that doesn't work we fall back to the primary-expression. */
5083 cp_parser_parse_tentatively (parser
);
5084 /* Look for the simple-type-specifier. */
5085 type
= cp_parser_simple_type_specifier (parser
,
5086 /*decl_specs=*/NULL
,
5087 CP_PARSER_FLAGS_NONE
);
5088 /* Parse the cast itself. */
5089 if (!cp_parser_error_occurred (parser
))
5091 = cp_parser_functional_cast (parser
, type
);
5092 /* If that worked, we're done. */
5093 if (cp_parser_parse_definitely (parser
))
5096 /* If the functional-cast didn't work out, try a
5097 compound-literal. */
5098 if (cp_parser_allow_gnu_extensions_p (parser
)
5099 && cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_PAREN
))
5101 VEC(constructor_elt
,gc
) *initializer_list
= NULL
;
5102 bool saved_in_type_id_in_expr_p
;
5104 cp_parser_parse_tentatively (parser
);
5105 /* Consume the `('. */
5106 cp_lexer_consume_token (parser
->lexer
);
5107 /* Parse the type. */
5108 saved_in_type_id_in_expr_p
= parser
->in_type_id_in_expr_p
;
5109 parser
->in_type_id_in_expr_p
= true;
5110 type
= cp_parser_type_id (parser
);
5111 parser
->in_type_id_in_expr_p
= saved_in_type_id_in_expr_p
;
5112 /* Look for the `)'. */
5113 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
5114 /* Look for the `{'. */
5115 cp_parser_require (parser
, CPP_OPEN_BRACE
, RT_OPEN_BRACE
);
5116 /* If things aren't going well, there's no need to
5118 if (!cp_parser_error_occurred (parser
))
5120 bool non_constant_p
;
5121 /* Parse the initializer-list. */
5123 = cp_parser_initializer_list (parser
, &non_constant_p
);
5124 /* Allow a trailing `,'. */
5125 if (cp_lexer_next_token_is (parser
->lexer
, CPP_COMMA
))
5126 cp_lexer_consume_token (parser
->lexer
);
5127 /* Look for the final `}'. */
5128 cp_parser_require (parser
, CPP_CLOSE_BRACE
, RT_CLOSE_BRACE
);
5130 /* If that worked, we're definitely looking at a
5131 compound-literal expression. */
5132 if (cp_parser_parse_definitely (parser
))
5134 /* Warn the user that a compound literal is not
5135 allowed in standard C++. */
5136 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids compound-literals");
5137 /* For simplicity, we disallow compound literals in
5138 constant-expressions. We could
5139 allow compound literals of integer type, whose
5140 initializer was a constant, in constant
5141 expressions. Permitting that usage, as a further
5142 extension, would not change the meaning of any
5143 currently accepted programs. (Of course, as
5144 compound literals are not part of ISO C++, the
5145 standard has nothing to say.) */
5146 if (cp_parser_non_integral_constant_expression (parser
,
5149 postfix_expression
= error_mark_node
;
5152 /* Form the representation of the compound-literal. */
5154 = (finish_compound_literal
5155 (type
, build_constructor (init_list_type_node
,
5156 initializer_list
)));
5161 /* It must be a primary-expression. */
5163 = cp_parser_primary_expression (parser
, address_p
, cast_p
,
5164 /*template_arg_p=*/false,
5170 /* Keep looping until the postfix-expression is complete. */
5173 if (idk
== CP_ID_KIND_UNQUALIFIED
5174 && TREE_CODE (postfix_expression
) == IDENTIFIER_NODE
5175 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_OPEN_PAREN
))
5176 /* It is not a Koenig lookup function call. */
5178 = unqualified_name_lookup_error (postfix_expression
);
5180 /* Peek at the next token. */
5181 token
= cp_lexer_peek_token (parser
->lexer
);
5183 switch (token
->type
)
5185 case CPP_OPEN_SQUARE
:
5187 = cp_parser_postfix_open_square_expression (parser
,
5190 idk
= CP_ID_KIND_NONE
;
5191 is_member_access
= false;
5194 case CPP_OPEN_PAREN
:
5195 /* postfix-expression ( expression-list [opt] ) */
5198 bool is_builtin_constant_p
;
5199 bool saved_integral_constant_expression_p
= false;
5200 bool saved_non_integral_constant_expression_p
= false;
5203 is_member_access
= false;
5205 is_builtin_constant_p
5206 = DECL_IS_BUILTIN_CONSTANT_P (postfix_expression
);
5207 if (is_builtin_constant_p
)
5209 /* The whole point of __builtin_constant_p is to allow
5210 non-constant expressions to appear as arguments. */
5211 saved_integral_constant_expression_p
5212 = parser
->integral_constant_expression_p
;
5213 saved_non_integral_constant_expression_p
5214 = parser
->non_integral_constant_expression_p
;
5215 parser
->integral_constant_expression_p
= false;
5217 args
= (cp_parser_parenthesized_expression_list
5219 /*cast_p=*/false, /*allow_expansion_p=*/true,
5220 /*non_constant_p=*/NULL
));
5221 if (is_builtin_constant_p
)
5223 parser
->integral_constant_expression_p
5224 = saved_integral_constant_expression_p
;
5225 parser
->non_integral_constant_expression_p
5226 = saved_non_integral_constant_expression_p
;
5231 postfix_expression
= error_mark_node
;
5235 /* Function calls are not permitted in
5236 constant-expressions. */
5237 if (! builtin_valid_in_constant_expr_p (postfix_expression
)
5238 && cp_parser_non_integral_constant_expression (parser
,
5241 postfix_expression
= error_mark_node
;
5242 release_tree_vector (args
);
5247 if (idk
== CP_ID_KIND_UNQUALIFIED
5248 || idk
== CP_ID_KIND_TEMPLATE_ID
)
5250 if (TREE_CODE (postfix_expression
) == IDENTIFIER_NODE
)
5252 if (!VEC_empty (tree
, args
))
5255 if (!any_type_dependent_arguments_p (args
))
5257 = perform_koenig_lookup (postfix_expression
, args
,
5258 /*include_std=*/false);
5262 = unqualified_fn_lookup_error (postfix_expression
);
5264 /* We do not perform argument-dependent lookup if
5265 normal lookup finds a non-function, in accordance
5266 with the expected resolution of DR 218. */
5267 else if (!VEC_empty (tree
, args
)
5268 && is_overloaded_fn (postfix_expression
))
5270 tree fn
= get_first_fn (postfix_expression
);
5271 fn
= STRIP_TEMPLATE (fn
);
5273 /* Do not do argument dependent lookup if regular
5274 lookup finds a member function or a block-scope
5275 function declaration. [basic.lookup.argdep]/3 */
5276 if (!DECL_FUNCTION_MEMBER_P (fn
)
5277 && !DECL_LOCAL_FUNCTION_P (fn
))
5280 if (!any_type_dependent_arguments_p (args
))
5282 = perform_koenig_lookup (postfix_expression
, args
,
5283 /*include_std=*/false);
5288 if (TREE_CODE (postfix_expression
) == COMPONENT_REF
)
5290 tree instance
= TREE_OPERAND (postfix_expression
, 0);
5291 tree fn
= TREE_OPERAND (postfix_expression
, 1);
5293 if (processing_template_decl
5294 && (type_dependent_expression_p (instance
)
5295 || (!BASELINK_P (fn
)
5296 && TREE_CODE (fn
) != FIELD_DECL
)
5297 || type_dependent_expression_p (fn
)
5298 || any_type_dependent_arguments_p (args
)))
5301 = build_nt_call_vec (postfix_expression
, args
);
5302 release_tree_vector (args
);
5306 if (BASELINK_P (fn
))
5309 = (build_new_method_call
5310 (instance
, fn
, &args
, NULL_TREE
,
5311 (idk
== CP_ID_KIND_QUALIFIED
5312 ? LOOKUP_NONVIRTUAL
: LOOKUP_NORMAL
),
5314 tf_warning_or_error
));
5318 = finish_call_expr (postfix_expression
, &args
,
5319 /*disallow_virtual=*/false,
5321 tf_warning_or_error
);
5323 else if (TREE_CODE (postfix_expression
) == OFFSET_REF
5324 || TREE_CODE (postfix_expression
) == MEMBER_REF
5325 || TREE_CODE (postfix_expression
) == DOTSTAR_EXPR
)
5326 postfix_expression
= (build_offset_ref_call_from_tree
5327 (postfix_expression
, &args
));
5328 else if (idk
== CP_ID_KIND_QUALIFIED
)
5329 /* A call to a static class member, or a namespace-scope
5332 = finish_call_expr (postfix_expression
, &args
,
5333 /*disallow_virtual=*/true,
5335 tf_warning_or_error
);
5337 /* All other function calls. */
5339 = finish_call_expr (postfix_expression
, &args
,
5340 /*disallow_virtual=*/false,
5342 tf_warning_or_error
);
5344 /* The POSTFIX_EXPRESSION is certainly no longer an id. */
5345 idk
= CP_ID_KIND_NONE
;
5347 release_tree_vector (args
);
5353 /* postfix-expression . template [opt] id-expression
5354 postfix-expression . pseudo-destructor-name
5355 postfix-expression -> template [opt] id-expression
5356 postfix-expression -> pseudo-destructor-name */
5358 /* Consume the `.' or `->' operator. */
5359 cp_lexer_consume_token (parser
->lexer
);
5362 = cp_parser_postfix_dot_deref_expression (parser
, token
->type
,
5367 is_member_access
= true;
5371 /* postfix-expression ++ */
5372 /* Consume the `++' token. */
5373 cp_lexer_consume_token (parser
->lexer
);
5374 /* Generate a representation for the complete expression. */
5376 = finish_increment_expr (postfix_expression
,
5377 POSTINCREMENT_EXPR
);
5378 /* Increments may not appear in constant-expressions. */
5379 if (cp_parser_non_integral_constant_expression (parser
, NIC_INC
))
5380 postfix_expression
= error_mark_node
;
5381 idk
= CP_ID_KIND_NONE
;
5382 is_member_access
= false;
5385 case CPP_MINUS_MINUS
:
5386 /* postfix-expression -- */
5387 /* Consume the `--' token. */
5388 cp_lexer_consume_token (parser
->lexer
);
5389 /* Generate a representation for the complete expression. */
5391 = finish_increment_expr (postfix_expression
,
5392 POSTDECREMENT_EXPR
);
5393 /* Decrements may not appear in constant-expressions. */
5394 if (cp_parser_non_integral_constant_expression (parser
, NIC_DEC
))
5395 postfix_expression
= error_mark_node
;
5396 idk
= CP_ID_KIND_NONE
;
5397 is_member_access
= false;
5401 if (pidk_return
!= NULL
)
5402 * pidk_return
= idk
;
5403 if (member_access_only_p
)
5404 return is_member_access
? postfix_expression
: error_mark_node
;
5406 return postfix_expression
;
5410 /* We should never get here. */
5412 return error_mark_node
;
5415 /* A subroutine of cp_parser_postfix_expression that also gets hijacked
5416 by cp_parser_builtin_offsetof. We're looking for
5418 postfix-expression [ expression ]
5420 FOR_OFFSETOF is set if we're being called in that context, which
5421 changes how we deal with integer constant expressions. */
5424 cp_parser_postfix_open_square_expression (cp_parser
*parser
,
5425 tree postfix_expression
,
5430 /* Consume the `[' token. */
5431 cp_lexer_consume_token (parser
->lexer
);
5433 /* Parse the index expression. */
5434 /* ??? For offsetof, there is a question of what to allow here. If
5435 offsetof is not being used in an integral constant expression context,
5436 then we *could* get the right answer by computing the value at runtime.
5437 If we are in an integral constant expression context, then we might
5438 could accept any constant expression; hard to say without analysis.
5439 Rather than open the barn door too wide right away, allow only integer
5440 constant expressions here. */
5442 index
= cp_parser_constant_expression (parser
, false, NULL
);
5444 index
= cp_parser_expression (parser
, /*cast_p=*/false, NULL
);
5446 /* Look for the closing `]'. */
5447 cp_parser_require (parser
, CPP_CLOSE_SQUARE
, RT_CLOSE_SQUARE
);
5449 /* Build the ARRAY_REF. */
5450 postfix_expression
= grok_array_decl (postfix_expression
, index
);
5452 /* When not doing offsetof, array references are not permitted in
5453 constant-expressions. */
5455 && (cp_parser_non_integral_constant_expression (parser
, NIC_ARRAY_REF
)))
5456 postfix_expression
= error_mark_node
;
5458 return postfix_expression
;
5461 /* A subroutine of cp_parser_postfix_expression that also gets hijacked
5462 by cp_parser_builtin_offsetof. We're looking for
5464 postfix-expression . template [opt] id-expression
5465 postfix-expression . pseudo-destructor-name
5466 postfix-expression -> template [opt] id-expression
5467 postfix-expression -> pseudo-destructor-name
5469 FOR_OFFSETOF is set if we're being called in that context. That sorta
5470 limits what of the above we'll actually accept, but nevermind.
5471 TOKEN_TYPE is the "." or "->" token, which will already have been
5472 removed from the stream. */
5475 cp_parser_postfix_dot_deref_expression (cp_parser
*parser
,
5476 enum cpp_ttype token_type
,
5477 tree postfix_expression
,
5478 bool for_offsetof
, cp_id_kind
*idk
,
5479 location_t location
)
5483 bool pseudo_destructor_p
;
5484 tree scope
= NULL_TREE
;
5486 /* If this is a `->' operator, dereference the pointer. */
5487 if (token_type
== CPP_DEREF
)
5488 postfix_expression
= build_x_arrow (postfix_expression
);
5489 /* Check to see whether or not the expression is type-dependent. */
5490 dependent_p
= type_dependent_expression_p (postfix_expression
);
5491 /* The identifier following the `->' or `.' is not qualified. */
5492 parser
->scope
= NULL_TREE
;
5493 parser
->qualifying_scope
= NULL_TREE
;
5494 parser
->object_scope
= NULL_TREE
;
5495 *idk
= CP_ID_KIND_NONE
;
5497 /* Enter the scope corresponding to the type of the object
5498 given by the POSTFIX_EXPRESSION. */
5499 if (!dependent_p
&& TREE_TYPE (postfix_expression
) != NULL_TREE
)
5501 scope
= TREE_TYPE (postfix_expression
);
5502 /* According to the standard, no expression should ever have
5503 reference type. Unfortunately, we do not currently match
5504 the standard in this respect in that our internal representation
5505 of an expression may have reference type even when the standard
5506 says it does not. Therefore, we have to manually obtain the
5507 underlying type here. */
5508 scope
= non_reference (scope
);
5509 /* The type of the POSTFIX_EXPRESSION must be complete. */
5510 if (scope
== unknown_type_node
)
5512 error_at (location
, "%qE does not have class type",
5513 postfix_expression
);
5517 scope
= complete_type_or_else (scope
, NULL_TREE
);
5518 /* Let the name lookup machinery know that we are processing a
5519 class member access expression. */
5520 parser
->context
->object_type
= scope
;
5521 /* If something went wrong, we want to be able to discern that case,
5522 as opposed to the case where there was no SCOPE due to the type
5523 of expression being dependent. */
5525 scope
= error_mark_node
;
5526 /* If the SCOPE was erroneous, make the various semantic analysis
5527 functions exit quickly -- and without issuing additional error
5529 if (scope
== error_mark_node
)
5530 postfix_expression
= error_mark_node
;
5533 /* Assume this expression is not a pseudo-destructor access. */
5534 pseudo_destructor_p
= false;
5536 /* If the SCOPE is a scalar type, then, if this is a valid program,
5537 we must be looking at a pseudo-destructor-name. If POSTFIX_EXPRESSION
5538 is type dependent, it can be pseudo-destructor-name or something else.
5539 Try to parse it as pseudo-destructor-name first. */
5540 if ((scope
&& SCALAR_TYPE_P (scope
)) || dependent_p
)
5545 cp_parser_parse_tentatively (parser
);
5546 /* Parse the pseudo-destructor-name. */
5548 cp_parser_pseudo_destructor_name (parser
, &s
, &type
);
5550 && (cp_parser_error_occurred (parser
)
5551 || TREE_CODE (type
) != TYPE_DECL
5552 || !SCALAR_TYPE_P (TREE_TYPE (type
))))
5553 cp_parser_abort_tentative_parse (parser
);
5554 else if (cp_parser_parse_definitely (parser
))
5556 pseudo_destructor_p
= true;
5558 = finish_pseudo_destructor_expr (postfix_expression
,
5559 s
, TREE_TYPE (type
));
5563 if (!pseudo_destructor_p
)
5565 /* If the SCOPE is not a scalar type, we are looking at an
5566 ordinary class member access expression, rather than a
5567 pseudo-destructor-name. */
5569 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
5570 /* Parse the id-expression. */
5571 name
= (cp_parser_id_expression
5573 cp_parser_optional_template_keyword (parser
),
5574 /*check_dependency_p=*/true,
5576 /*declarator_p=*/false,
5577 /*optional_p=*/false));
5578 /* In general, build a SCOPE_REF if the member name is qualified.
5579 However, if the name was not dependent and has already been
5580 resolved; there is no need to build the SCOPE_REF. For example;
5582 struct X { void f(); };
5583 template <typename T> void f(T* t) { t->X::f(); }
5585 Even though "t" is dependent, "X::f" is not and has been resolved
5586 to a BASELINK; there is no need to include scope information. */
5588 /* But we do need to remember that there was an explicit scope for
5589 virtual function calls. */
5591 *idk
= CP_ID_KIND_QUALIFIED
;
5593 /* If the name is a template-id that names a type, we will get a
5594 TYPE_DECL here. That is invalid code. */
5595 if (TREE_CODE (name
) == TYPE_DECL
)
5597 error_at (token
->location
, "invalid use of %qD", name
);
5598 postfix_expression
= error_mark_node
;
5602 if (name
!= error_mark_node
&& !BASELINK_P (name
) && parser
->scope
)
5604 name
= build_qualified_name (/*type=*/NULL_TREE
,
5608 parser
->scope
= NULL_TREE
;
5609 parser
->qualifying_scope
= NULL_TREE
;
5610 parser
->object_scope
= NULL_TREE
;
5612 if (scope
&& name
&& BASELINK_P (name
))
5613 adjust_result_of_qualified_name_lookup
5614 (name
, BINFO_TYPE (BASELINK_ACCESS_BINFO (name
)), scope
);
5616 = finish_class_member_access_expr (postfix_expression
, name
,
5618 tf_warning_or_error
);
5622 /* We no longer need to look up names in the scope of the object on
5623 the left-hand side of the `.' or `->' operator. */
5624 parser
->context
->object_type
= NULL_TREE
;
5626 /* Outside of offsetof, these operators may not appear in
5627 constant-expressions. */
5629 && (cp_parser_non_integral_constant_expression
5630 (parser
, token_type
== CPP_DEREF
? NIC_ARROW
: NIC_POINT
)))
5631 postfix_expression
= error_mark_node
;
5633 return postfix_expression
;
5636 /* Parse a parenthesized expression-list.
5639 assignment-expression
5640 expression-list, assignment-expression
5645 identifier, expression-list
5647 CAST_P is true if this expression is the target of a cast.
5649 ALLOW_EXPANSION_P is true if this expression allows expansion of an
5652 Returns a vector of trees. Each element is a representation of an
5653 assignment-expression. NULL is returned if the ( and or ) are
5654 missing. An empty, but allocated, vector is returned on no
5655 expressions. The parentheses are eaten. IS_ATTRIBUTE_LIST is id_attr
5656 if we are parsing an attribute list for an attribute that wants a
5657 plain identifier argument, normal_attr for an attribute that wants
5658 an expression, or non_attr if we aren't parsing an attribute list. If
5659 NON_CONSTANT_P is non-NULL, *NON_CONSTANT_P indicates whether or
5660 not all of the expressions in the list were constant. */
5662 static VEC(tree
,gc
) *
5663 cp_parser_parenthesized_expression_list (cp_parser
* parser
,
5664 int is_attribute_list
,
5666 bool allow_expansion_p
,
5667 bool *non_constant_p
)
5669 VEC(tree
,gc
) *expression_list
;
5670 bool fold_expr_p
= is_attribute_list
!= non_attr
;
5671 tree identifier
= NULL_TREE
;
5672 bool saved_greater_than_is_operator_p
;
5674 /* Assume all the expressions will be constant. */
5676 *non_constant_p
= false;
5678 if (!cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
5681 expression_list
= make_tree_vector ();
5683 /* Within a parenthesized expression, a `>' token is always
5684 the greater-than operator. */
5685 saved_greater_than_is_operator_p
5686 = parser
->greater_than_is_operator_p
;
5687 parser
->greater_than_is_operator_p
= true;
5689 /* Consume expressions until there are no more. */
5690 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_CLOSE_PAREN
))
5695 /* At the beginning of attribute lists, check to see if the
5696 next token is an identifier. */
5697 if (is_attribute_list
== id_attr
5698 && cp_lexer_peek_token (parser
->lexer
)->type
== CPP_NAME
)
5702 /* Consume the identifier. */
5703 token
= cp_lexer_consume_token (parser
->lexer
);
5704 /* Save the identifier. */
5705 identifier
= token
->u
.value
;
5709 bool expr_non_constant_p
;
5711 /* Parse the next assignment-expression. */
5712 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
5714 /* A braced-init-list. */
5715 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5716 expr
= cp_parser_braced_list (parser
, &expr_non_constant_p
);
5717 if (non_constant_p
&& expr_non_constant_p
)
5718 *non_constant_p
= true;
5720 else if (non_constant_p
)
5722 expr
= (cp_parser_constant_expression
5723 (parser
, /*allow_non_constant_p=*/true,
5724 &expr_non_constant_p
));
5725 if (expr_non_constant_p
)
5726 *non_constant_p
= true;
5729 expr
= cp_parser_assignment_expression (parser
, cast_p
, NULL
);
5732 expr
= fold_non_dependent_expr (expr
);
5734 /* If we have an ellipsis, then this is an expression
5736 if (allow_expansion_p
5737 && cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
5739 /* Consume the `...'. */
5740 cp_lexer_consume_token (parser
->lexer
);
5742 /* Build the argument pack. */
5743 expr
= make_pack_expansion (expr
);
5746 /* Add it to the list. We add error_mark_node
5747 expressions to the list, so that we can still tell if
5748 the correct form for a parenthesized expression-list
5749 is found. That gives better errors. */
5750 VEC_safe_push (tree
, gc
, expression_list
, expr
);
5752 if (expr
== error_mark_node
)
5756 /* After the first item, attribute lists look the same as
5757 expression lists. */
5758 is_attribute_list
= non_attr
;
5761 /* If the next token isn't a `,', then we are done. */
5762 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COMMA
))
5765 /* Otherwise, consume the `,' and keep going. */
5766 cp_lexer_consume_token (parser
->lexer
);
5769 if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
5774 /* We try and resync to an unnested comma, as that will give the
5775 user better diagnostics. */
5776 ending
= cp_parser_skip_to_closing_parenthesis (parser
,
5777 /*recovering=*/true,
5779 /*consume_paren=*/true);
5784 parser
->greater_than_is_operator_p
5785 = saved_greater_than_is_operator_p
;
5790 parser
->greater_than_is_operator_p
5791 = saved_greater_than_is_operator_p
;
5794 VEC_safe_insert (tree
, gc
, expression_list
, 0, identifier
);
5796 return expression_list
;
5799 /* Parse a pseudo-destructor-name.
5801 pseudo-destructor-name:
5802 :: [opt] nested-name-specifier [opt] type-name :: ~ type-name
5803 :: [opt] nested-name-specifier template template-id :: ~ type-name
5804 :: [opt] nested-name-specifier [opt] ~ type-name
5806 If either of the first two productions is used, sets *SCOPE to the
5807 TYPE specified before the final `::'. Otherwise, *SCOPE is set to
5808 NULL_TREE. *TYPE is set to the TYPE_DECL for the final type-name,
5809 or ERROR_MARK_NODE if the parse fails. */
5812 cp_parser_pseudo_destructor_name (cp_parser
* parser
,
5816 bool nested_name_specifier_p
;
5818 /* Assume that things will not work out. */
5819 *type
= error_mark_node
;
5821 /* Look for the optional `::' operator. */
5822 cp_parser_global_scope_opt (parser
, /*current_scope_valid_p=*/true);
5823 /* Look for the optional nested-name-specifier. */
5824 nested_name_specifier_p
5825 = (cp_parser_nested_name_specifier_opt (parser
,
5826 /*typename_keyword_p=*/false,
5827 /*check_dependency_p=*/true,
5829 /*is_declaration=*/false)
5831 /* Now, if we saw a nested-name-specifier, we might be doing the
5832 second production. */
5833 if (nested_name_specifier_p
5834 && cp_lexer_next_token_is_keyword (parser
->lexer
, RID_TEMPLATE
))
5836 /* Consume the `template' keyword. */
5837 cp_lexer_consume_token (parser
->lexer
);
5838 /* Parse the template-id. */
5839 cp_parser_template_id (parser
,
5840 /*template_keyword_p=*/true,
5841 /*check_dependency_p=*/false,
5842 /*is_declaration=*/true);
5843 /* Look for the `::' token. */
5844 cp_parser_require (parser
, CPP_SCOPE
, RT_SCOPE
);
5846 /* If the next token is not a `~', then there might be some
5847 additional qualification. */
5848 else if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COMPL
))
5850 /* At this point, we're looking for "type-name :: ~". The type-name
5851 must not be a class-name, since this is a pseudo-destructor. So,
5852 it must be either an enum-name, or a typedef-name -- both of which
5853 are just identifiers. So, we peek ahead to check that the "::"
5854 and "~" tokens are present; if they are not, then we can avoid
5855 calling type_name. */
5856 if (cp_lexer_peek_token (parser
->lexer
)->type
!= CPP_NAME
5857 || cp_lexer_peek_nth_token (parser
->lexer
, 2)->type
!= CPP_SCOPE
5858 || cp_lexer_peek_nth_token (parser
->lexer
, 3)->type
!= CPP_COMPL
)
5860 cp_parser_error (parser
, "non-scalar type");
5864 /* Look for the type-name. */
5865 *scope
= TREE_TYPE (cp_parser_nonclass_name (parser
));
5866 if (*scope
== error_mark_node
)
5869 /* Look for the `::' token. */
5870 cp_parser_require (parser
, CPP_SCOPE
, RT_SCOPE
);
5875 /* Look for the `~'. */
5876 cp_parser_require (parser
, CPP_COMPL
, RT_COMPL
);
5877 /* Look for the type-name again. We are not responsible for
5878 checking that it matches the first type-name. */
5879 *type
= cp_parser_nonclass_name (parser
);
5882 /* Parse a unary-expression.
5888 unary-operator cast-expression
5889 sizeof unary-expression
5891 alignof ( type-id ) [C++0x]
5898 __extension__ cast-expression
5899 __alignof__ unary-expression
5900 __alignof__ ( type-id )
5901 alignof unary-expression [C++0x]
5902 __real__ cast-expression
5903 __imag__ cast-expression
5906 ADDRESS_P is true iff the unary-expression is appearing as the
5907 operand of the `&' operator. CAST_P is true if this expression is
5908 the target of a cast.
5910 Returns a representation of the expression. */
5913 cp_parser_unary_expression (cp_parser
*parser
, bool address_p
, bool cast_p
,
5917 enum tree_code unary_operator
;
5919 /* Peek at the next token. */
5920 token
= cp_lexer_peek_token (parser
->lexer
);
5921 /* Some keywords give away the kind of expression. */
5922 if (token
->type
== CPP_KEYWORD
)
5924 enum rid keyword
= token
->keyword
;
5934 op
= keyword
== RID_ALIGNOF
? ALIGNOF_EXPR
: SIZEOF_EXPR
;
5935 /* Consume the token. */
5936 cp_lexer_consume_token (parser
->lexer
);
5937 /* Parse the operand. */
5938 operand
= cp_parser_sizeof_operand (parser
, keyword
);
5940 if (TYPE_P (operand
))
5941 return cxx_sizeof_or_alignof_type (operand
, op
, true);
5944 /* ISO C++ defines alignof only with types, not with
5945 expressions. So pedwarn if alignof is used with a non-
5946 type expression. However, __alignof__ is ok. */
5947 if (!strcmp (IDENTIFIER_POINTER (token
->u
.value
), "alignof"))
5948 pedwarn (token
->location
, OPT_pedantic
,
5949 "ISO C++ does not allow %<alignof%> "
5952 return cxx_sizeof_or_alignof_expr (operand
, op
, true);
5957 return cp_parser_new_expression (parser
);
5960 return cp_parser_delete_expression (parser
);
5964 /* The saved value of the PEDANTIC flag. */
5968 /* Save away the PEDANTIC flag. */
5969 cp_parser_extension_opt (parser
, &saved_pedantic
);
5970 /* Parse the cast-expression. */
5971 expr
= cp_parser_simple_cast_expression (parser
);
5972 /* Restore the PEDANTIC flag. */
5973 pedantic
= saved_pedantic
;
5983 /* Consume the `__real__' or `__imag__' token. */
5984 cp_lexer_consume_token (parser
->lexer
);
5985 /* Parse the cast-expression. */
5986 expression
= cp_parser_simple_cast_expression (parser
);
5987 /* Create the complete representation. */
5988 return build_x_unary_op ((keyword
== RID_REALPART
5989 ? REALPART_EXPR
: IMAGPART_EXPR
),
5991 tf_warning_or_error
);
5998 const char *saved_message
;
5999 bool saved_integral_constant_expression_p
;
6000 bool saved_non_integral_constant_expression_p
;
6001 bool saved_greater_than_is_operator_p
;
6003 cp_lexer_consume_token (parser
->lexer
);
6004 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
6006 saved_message
= parser
->type_definition_forbidden_message
;
6007 parser
->type_definition_forbidden_message
6008 = G_("types may not be defined in %<noexcept%> expressions");
6010 saved_integral_constant_expression_p
6011 = parser
->integral_constant_expression_p
;
6012 saved_non_integral_constant_expression_p
6013 = parser
->non_integral_constant_expression_p
;
6014 parser
->integral_constant_expression_p
= false;
6016 saved_greater_than_is_operator_p
6017 = parser
->greater_than_is_operator_p
;
6018 parser
->greater_than_is_operator_p
= true;
6020 ++cp_unevaluated_operand
;
6021 ++c_inhibit_evaluation_warnings
;
6022 expr
= cp_parser_expression (parser
, false, NULL
);
6023 --c_inhibit_evaluation_warnings
;
6024 --cp_unevaluated_operand
;
6026 parser
->greater_than_is_operator_p
6027 = saved_greater_than_is_operator_p
;
6029 parser
->integral_constant_expression_p
6030 = saved_integral_constant_expression_p
;
6031 parser
->non_integral_constant_expression_p
6032 = saved_non_integral_constant_expression_p
;
6034 parser
->type_definition_forbidden_message
= saved_message
;
6036 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
6037 return finish_noexcept_expr (expr
, tf_warning_or_error
);
6045 /* Look for the `:: new' and `:: delete', which also signal the
6046 beginning of a new-expression, or delete-expression,
6047 respectively. If the next token is `::', then it might be one of
6049 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SCOPE
))
6053 /* See if the token after the `::' is one of the keywords in
6054 which we're interested. */
6055 keyword
= cp_lexer_peek_nth_token (parser
->lexer
, 2)->keyword
;
6056 /* If it's `new', we have a new-expression. */
6057 if (keyword
== RID_NEW
)
6058 return cp_parser_new_expression (parser
);
6059 /* Similarly, for `delete'. */
6060 else if (keyword
== RID_DELETE
)
6061 return cp_parser_delete_expression (parser
);
6064 /* Look for a unary operator. */
6065 unary_operator
= cp_parser_unary_operator (token
);
6066 /* The `++' and `--' operators can be handled similarly, even though
6067 they are not technically unary-operators in the grammar. */
6068 if (unary_operator
== ERROR_MARK
)
6070 if (token
->type
== CPP_PLUS_PLUS
)
6071 unary_operator
= PREINCREMENT_EXPR
;
6072 else if (token
->type
== CPP_MINUS_MINUS
)
6073 unary_operator
= PREDECREMENT_EXPR
;
6074 /* Handle the GNU address-of-label extension. */
6075 else if (cp_parser_allow_gnu_extensions_p (parser
)
6076 && token
->type
== CPP_AND_AND
)
6080 location_t loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
6082 /* Consume the '&&' token. */
6083 cp_lexer_consume_token (parser
->lexer
);
6084 /* Look for the identifier. */
6085 identifier
= cp_parser_identifier (parser
);
6086 /* Create an expression representing the address. */
6087 expression
= finish_label_address_expr (identifier
, loc
);
6088 if (cp_parser_non_integral_constant_expression (parser
,
6090 expression
= error_mark_node
;
6094 if (unary_operator
!= ERROR_MARK
)
6096 tree cast_expression
;
6097 tree expression
= error_mark_node
;
6098 non_integral_constant non_constant_p
= NIC_NONE
;
6100 /* Consume the operator token. */
6101 token
= cp_lexer_consume_token (parser
->lexer
);
6102 /* Parse the cast-expression. */
6104 = cp_parser_cast_expression (parser
,
6105 unary_operator
== ADDR_EXPR
,
6106 /*cast_p=*/false, pidk
);
6107 /* Now, build an appropriate representation. */
6108 switch (unary_operator
)
6111 non_constant_p
= NIC_STAR
;
6112 expression
= build_x_indirect_ref (cast_expression
, RO_UNARY_STAR
,
6113 tf_warning_or_error
);
6117 non_constant_p
= NIC_ADDR
;
6120 expression
= build_x_unary_op (unary_operator
, cast_expression
,
6121 tf_warning_or_error
);
6124 case PREINCREMENT_EXPR
:
6125 case PREDECREMENT_EXPR
:
6126 non_constant_p
= unary_operator
== PREINCREMENT_EXPR
6127 ? NIC_PREINCREMENT
: NIC_PREDECREMENT
;
6129 case UNARY_PLUS_EXPR
:
6131 case TRUTH_NOT_EXPR
:
6132 expression
= finish_unary_op_expr (unary_operator
, cast_expression
);
6139 if (non_constant_p
!= NIC_NONE
6140 && cp_parser_non_integral_constant_expression (parser
,
6142 expression
= error_mark_node
;
6147 return cp_parser_postfix_expression (parser
, address_p
, cast_p
,
6148 /*member_access_only_p=*/false,
6152 /* Returns ERROR_MARK if TOKEN is not a unary-operator. If TOKEN is a
6153 unary-operator, the corresponding tree code is returned. */
6155 static enum tree_code
6156 cp_parser_unary_operator (cp_token
* token
)
6158 switch (token
->type
)
6161 return INDIRECT_REF
;
6167 return UNARY_PLUS_EXPR
;
6173 return TRUTH_NOT_EXPR
;
6176 return BIT_NOT_EXPR
;
6183 /* Parse a new-expression.
6186 :: [opt] new new-placement [opt] new-type-id new-initializer [opt]
6187 :: [opt] new new-placement [opt] ( type-id ) new-initializer [opt]
6189 Returns a representation of the expression. */
6192 cp_parser_new_expression (cp_parser
* parser
)
6194 bool global_scope_p
;
6195 VEC(tree
,gc
) *placement
;
6197 VEC(tree
,gc
) *initializer
;
6201 /* Look for the optional `::' operator. */
6203 = (cp_parser_global_scope_opt (parser
,
6204 /*current_scope_valid_p=*/false)
6206 /* Look for the `new' operator. */
6207 cp_parser_require_keyword (parser
, RID_NEW
, RT_NEW
);
6208 /* There's no easy way to tell a new-placement from the
6209 `( type-id )' construct. */
6210 cp_parser_parse_tentatively (parser
);
6211 /* Look for a new-placement. */
6212 placement
= cp_parser_new_placement (parser
);
6213 /* If that didn't work out, there's no new-placement. */
6214 if (!cp_parser_parse_definitely (parser
))
6216 if (placement
!= NULL
)
6217 release_tree_vector (placement
);
6221 /* If the next token is a `(', then we have a parenthesized
6223 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_PAREN
))
6226 /* Consume the `('. */
6227 cp_lexer_consume_token (parser
->lexer
);
6228 /* Parse the type-id. */
6229 type
= cp_parser_type_id (parser
);
6230 /* Look for the closing `)'. */
6231 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
6232 token
= cp_lexer_peek_token (parser
->lexer
);
6233 /* There should not be a direct-new-declarator in this production,
6234 but GCC used to allowed this, so we check and emit a sensible error
6235 message for this case. */
6236 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_SQUARE
))
6238 error_at (token
->location
,
6239 "array bound forbidden after parenthesized type-id");
6240 inform (token
->location
,
6241 "try removing the parentheses around the type-id");
6242 cp_parser_direct_new_declarator (parser
);
6246 /* Otherwise, there must be a new-type-id. */
6248 type
= cp_parser_new_type_id (parser
, &nelts
);
6250 /* If the next token is a `(' or '{', then we have a new-initializer. */
6251 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_PAREN
)
6252 || cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
6253 initializer
= cp_parser_new_initializer (parser
);
6257 /* A new-expression may not appear in an integral constant
6259 if (cp_parser_non_integral_constant_expression (parser
, NIC_NEW
))
6260 ret
= error_mark_node
;
6263 /* Create a representation of the new-expression. */
6264 ret
= build_new (&placement
, type
, nelts
, &initializer
, global_scope_p
,
6265 tf_warning_or_error
);
6268 if (placement
!= NULL
)
6269 release_tree_vector (placement
);
6270 if (initializer
!= NULL
)
6271 release_tree_vector (initializer
);
6276 /* Parse a new-placement.
6281 Returns the same representation as for an expression-list. */
6283 static VEC(tree
,gc
) *
6284 cp_parser_new_placement (cp_parser
* parser
)
6286 VEC(tree
,gc
) *expression_list
;
6288 /* Parse the expression-list. */
6289 expression_list
= (cp_parser_parenthesized_expression_list
6290 (parser
, non_attr
, /*cast_p=*/false,
6291 /*allow_expansion_p=*/true,
6292 /*non_constant_p=*/NULL
));
6294 return expression_list
;
6297 /* Parse a new-type-id.
6300 type-specifier-seq new-declarator [opt]
6302 Returns the TYPE allocated. If the new-type-id indicates an array
6303 type, *NELTS is set to the number of elements in the last array
6304 bound; the TYPE will not include the last array bound. */
6307 cp_parser_new_type_id (cp_parser
* parser
, tree
*nelts
)
6309 cp_decl_specifier_seq type_specifier_seq
;
6310 cp_declarator
*new_declarator
;
6311 cp_declarator
*declarator
;
6312 cp_declarator
*outer_declarator
;
6313 const char *saved_message
;
6316 /* The type-specifier sequence must not contain type definitions.
6317 (It cannot contain declarations of new types either, but if they
6318 are not definitions we will catch that because they are not
6320 saved_message
= parser
->type_definition_forbidden_message
;
6321 parser
->type_definition_forbidden_message
6322 = G_("types may not be defined in a new-type-id");
6323 /* Parse the type-specifier-seq. */
6324 cp_parser_type_specifier_seq (parser
, /*is_declaration=*/false,
6325 /*is_trailing_return=*/false,
6326 &type_specifier_seq
);
6327 /* Restore the old message. */
6328 parser
->type_definition_forbidden_message
= saved_message
;
6329 /* Parse the new-declarator. */
6330 new_declarator
= cp_parser_new_declarator_opt (parser
);
6332 /* Determine the number of elements in the last array dimension, if
6335 /* Skip down to the last array dimension. */
6336 declarator
= new_declarator
;
6337 outer_declarator
= NULL
;
6338 while (declarator
&& (declarator
->kind
== cdk_pointer
6339 || declarator
->kind
== cdk_ptrmem
))
6341 outer_declarator
= declarator
;
6342 declarator
= declarator
->declarator
;
6345 && declarator
->kind
== cdk_array
6346 && declarator
->declarator
6347 && declarator
->declarator
->kind
== cdk_array
)
6349 outer_declarator
= declarator
;
6350 declarator
= declarator
->declarator
;
6353 if (declarator
&& declarator
->kind
== cdk_array
)
6355 *nelts
= declarator
->u
.array
.bounds
;
6356 if (*nelts
== error_mark_node
)
6357 *nelts
= integer_one_node
;
6359 if (outer_declarator
)
6360 outer_declarator
->declarator
= declarator
->declarator
;
6362 new_declarator
= NULL
;
6365 type
= groktypename (&type_specifier_seq
, new_declarator
, false);
6369 /* Parse an (optional) new-declarator.
6372 ptr-operator new-declarator [opt]
6373 direct-new-declarator
6375 Returns the declarator. */
6377 static cp_declarator
*
6378 cp_parser_new_declarator_opt (cp_parser
* parser
)
6380 enum tree_code code
;
6382 cp_cv_quals cv_quals
;
6384 /* We don't know if there's a ptr-operator next, or not. */
6385 cp_parser_parse_tentatively (parser
);
6386 /* Look for a ptr-operator. */
6387 code
= cp_parser_ptr_operator (parser
, &type
, &cv_quals
);
6388 /* If that worked, look for more new-declarators. */
6389 if (cp_parser_parse_definitely (parser
))
6391 cp_declarator
*declarator
;
6393 /* Parse another optional declarator. */
6394 declarator
= cp_parser_new_declarator_opt (parser
);
6396 return cp_parser_make_indirect_declarator
6397 (code
, type
, cv_quals
, declarator
);
6400 /* If the next token is a `[', there is a direct-new-declarator. */
6401 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_SQUARE
))
6402 return cp_parser_direct_new_declarator (parser
);
6407 /* Parse a direct-new-declarator.
6409 direct-new-declarator:
6411 direct-new-declarator [constant-expression]
6415 static cp_declarator
*
6416 cp_parser_direct_new_declarator (cp_parser
* parser
)
6418 cp_declarator
*declarator
= NULL
;
6424 /* Look for the opening `['. */
6425 cp_parser_require (parser
, CPP_OPEN_SQUARE
, RT_OPEN_SQUARE
);
6426 /* The first expression is not required to be constant. */
6429 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
6430 expression
= cp_parser_expression (parser
, /*cast_p=*/false, NULL
);
6431 /* The standard requires that the expression have integral
6432 type. DR 74 adds enumeration types. We believe that the
6433 real intent is that these expressions be handled like the
6434 expression in a `switch' condition, which also allows
6435 classes with a single conversion to integral or
6436 enumeration type. */
6437 if (!processing_template_decl
)
6440 = build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
6445 error_at (token
->location
,
6446 "expression in new-declarator must have integral "
6447 "or enumeration type");
6448 expression
= error_mark_node
;
6452 /* But all the other expressions must be. */
6455 = cp_parser_constant_expression (parser
,
6456 /*allow_non_constant=*/false,
6458 /* Look for the closing `]'. */
6459 cp_parser_require (parser
, CPP_CLOSE_SQUARE
, RT_CLOSE_SQUARE
);
6461 /* Add this bound to the declarator. */
6462 declarator
= make_array_declarator (declarator
, expression
);
6464 /* If the next token is not a `[', then there are no more
6466 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_OPEN_SQUARE
))
6473 /* Parse a new-initializer.
6476 ( expression-list [opt] )
6479 Returns a representation of the expression-list. */
6481 static VEC(tree
,gc
) *
6482 cp_parser_new_initializer (cp_parser
* parser
)
6484 VEC(tree
,gc
) *expression_list
;
6486 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
6489 bool expr_non_constant_p
;
6490 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
6491 t
= cp_parser_braced_list (parser
, &expr_non_constant_p
);
6492 CONSTRUCTOR_IS_DIRECT_INIT (t
) = 1;
6493 expression_list
= make_tree_vector_single (t
);
6496 expression_list
= (cp_parser_parenthesized_expression_list
6497 (parser
, non_attr
, /*cast_p=*/false,
6498 /*allow_expansion_p=*/true,
6499 /*non_constant_p=*/NULL
));
6501 return expression_list
;
6504 /* Parse a delete-expression.
6507 :: [opt] delete cast-expression
6508 :: [opt] delete [ ] cast-expression
6510 Returns a representation of the expression. */
6513 cp_parser_delete_expression (cp_parser
* parser
)
6515 bool global_scope_p
;
6519 /* Look for the optional `::' operator. */
6521 = (cp_parser_global_scope_opt (parser
,
6522 /*current_scope_valid_p=*/false)
6524 /* Look for the `delete' keyword. */
6525 cp_parser_require_keyword (parser
, RID_DELETE
, RT_DELETE
);
6526 /* See if the array syntax is in use. */
6527 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_SQUARE
))
6529 /* Consume the `[' token. */
6530 cp_lexer_consume_token (parser
->lexer
);
6531 /* Look for the `]' token. */
6532 cp_parser_require (parser
, CPP_CLOSE_SQUARE
, RT_CLOSE_SQUARE
);
6533 /* Remember that this is the `[]' construct. */
6539 /* Parse the cast-expression. */
6540 expression
= cp_parser_simple_cast_expression (parser
);
6542 /* A delete-expression may not appear in an integral constant
6544 if (cp_parser_non_integral_constant_expression (parser
, NIC_DEL
))
6545 return error_mark_node
;
6547 return delete_sanity (expression
, NULL_TREE
, array_p
, global_scope_p
);
6550 /* Returns true if TOKEN may start a cast-expression and false
6554 cp_parser_token_starts_cast_expression (cp_token
*token
)
6556 switch (token
->type
)
6562 case CPP_CLOSE_SQUARE
:
6563 case CPP_CLOSE_PAREN
:
6564 case CPP_CLOSE_BRACE
:
6568 case CPP_DEREF_STAR
:
6576 case CPP_GREATER_EQ
:
6596 /* '[' may start a primary-expression in obj-c++. */
6597 case CPP_OPEN_SQUARE
:
6598 return c_dialect_objc ();
6605 /* Parse a cast-expression.
6609 ( type-id ) cast-expression
6611 ADDRESS_P is true iff the unary-expression is appearing as the
6612 operand of the `&' operator. CAST_P is true if this expression is
6613 the target of a cast.
6615 Returns a representation of the expression. */
6618 cp_parser_cast_expression (cp_parser
*parser
, bool address_p
, bool cast_p
,
6621 /* If it's a `(', then we might be looking at a cast. */
6622 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_PAREN
))
6624 tree type
= NULL_TREE
;
6625 tree expr
= NULL_TREE
;
6626 bool compound_literal_p
;
6627 const char *saved_message
;
6629 /* There's no way to know yet whether or not this is a cast.
6630 For example, `(int (3))' is a unary-expression, while `(int)
6631 3' is a cast. So, we resort to parsing tentatively. */
6632 cp_parser_parse_tentatively (parser
);
6633 /* Types may not be defined in a cast. */
6634 saved_message
= parser
->type_definition_forbidden_message
;
6635 parser
->type_definition_forbidden_message
6636 = G_("types may not be defined in casts");
6637 /* Consume the `('. */
6638 cp_lexer_consume_token (parser
->lexer
);
6639 /* A very tricky bit is that `(struct S) { 3 }' is a
6640 compound-literal (which we permit in C++ as an extension).
6641 But, that construct is not a cast-expression -- it is a
6642 postfix-expression. (The reason is that `(struct S) { 3 }.i'
6643 is legal; if the compound-literal were a cast-expression,
6644 you'd need an extra set of parentheses.) But, if we parse
6645 the type-id, and it happens to be a class-specifier, then we
6646 will commit to the parse at that point, because we cannot
6647 undo the action that is done when creating a new class. So,
6648 then we cannot back up and do a postfix-expression.
6650 Therefore, we scan ahead to the closing `)', and check to see
6651 if the token after the `)' is a `{'. If so, we are not
6652 looking at a cast-expression.
6654 Save tokens so that we can put them back. */
6655 cp_lexer_save_tokens (parser
->lexer
);
6656 /* Skip tokens until the next token is a closing parenthesis.
6657 If we find the closing `)', and the next token is a `{', then
6658 we are looking at a compound-literal. */
6660 = (cp_parser_skip_to_closing_parenthesis (parser
, false, false,
6661 /*consume_paren=*/true)
6662 && cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
));
6663 /* Roll back the tokens we skipped. */
6664 cp_lexer_rollback_tokens (parser
->lexer
);
6665 /* If we were looking at a compound-literal, simulate an error
6666 so that the call to cp_parser_parse_definitely below will
6668 if (compound_literal_p
)
6669 cp_parser_simulate_error (parser
);
6672 bool saved_in_type_id_in_expr_p
= parser
->in_type_id_in_expr_p
;
6673 parser
->in_type_id_in_expr_p
= true;
6674 /* Look for the type-id. */
6675 type
= cp_parser_type_id (parser
);
6676 /* Look for the closing `)'. */
6677 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
6678 parser
->in_type_id_in_expr_p
= saved_in_type_id_in_expr_p
;
6681 /* Restore the saved message. */
6682 parser
->type_definition_forbidden_message
= saved_message
;
6684 /* At this point this can only be either a cast or a
6685 parenthesized ctor such as `(T ())' that looks like a cast to
6686 function returning T. */
6687 if (!cp_parser_error_occurred (parser
)
6688 && cp_parser_token_starts_cast_expression (cp_lexer_peek_token
6691 cp_parser_parse_definitely (parser
);
6692 expr
= cp_parser_cast_expression (parser
,
6693 /*address_p=*/false,
6694 /*cast_p=*/true, pidk
);
6696 /* Warn about old-style casts, if so requested. */
6697 if (warn_old_style_cast
6698 && !in_system_header
6699 && !VOID_TYPE_P (type
)
6700 && current_lang_name
!= lang_name_c
)
6701 warning (OPT_Wold_style_cast
, "use of old-style cast");
6703 /* Only type conversions to integral or enumeration types
6704 can be used in constant-expressions. */
6705 if (!cast_valid_in_integral_constant_expression_p (type
)
6706 && cp_parser_non_integral_constant_expression (parser
,
6708 return error_mark_node
;
6710 /* Perform the cast. */
6711 expr
= build_c_cast (input_location
, type
, expr
);
6715 cp_parser_abort_tentative_parse (parser
);
6718 /* If we get here, then it's not a cast, so it must be a
6719 unary-expression. */
6720 return cp_parser_unary_expression (parser
, address_p
, cast_p
, pidk
);
6723 /* Parse a binary expression of the general form:
6727 pm-expression .* cast-expression
6728 pm-expression ->* cast-expression
6730 multiplicative-expression:
6732 multiplicative-expression * pm-expression
6733 multiplicative-expression / pm-expression
6734 multiplicative-expression % pm-expression
6736 additive-expression:
6737 multiplicative-expression
6738 additive-expression + multiplicative-expression
6739 additive-expression - multiplicative-expression
6743 shift-expression << additive-expression
6744 shift-expression >> additive-expression
6746 relational-expression:
6748 relational-expression < shift-expression
6749 relational-expression > shift-expression
6750 relational-expression <= shift-expression
6751 relational-expression >= shift-expression
6755 relational-expression:
6756 relational-expression <? shift-expression
6757 relational-expression >? shift-expression
6759 equality-expression:
6760 relational-expression
6761 equality-expression == relational-expression
6762 equality-expression != relational-expression
6766 and-expression & equality-expression
6768 exclusive-or-expression:
6770 exclusive-or-expression ^ and-expression
6772 inclusive-or-expression:
6773 exclusive-or-expression
6774 inclusive-or-expression | exclusive-or-expression
6776 logical-and-expression:
6777 inclusive-or-expression
6778 logical-and-expression && inclusive-or-expression
6780 logical-or-expression:
6781 logical-and-expression
6782 logical-or-expression || logical-and-expression
6784 All these are implemented with a single function like:
6787 simple-cast-expression
6788 binary-expression <token> binary-expression
6790 CAST_P is true if this expression is the target of a cast.
6792 The binops_by_token map is used to get the tree codes for each <token> type.
6793 binary-expressions are associated according to a precedence table. */
6795 #define TOKEN_PRECEDENCE(token) \
6796 (((token->type == CPP_GREATER \
6797 || ((cxx_dialect != cxx98) && token->type == CPP_RSHIFT)) \
6798 && !parser->greater_than_is_operator_p) \
6799 ? PREC_NOT_OPERATOR \
6800 : binops_by_token[token->type].prec)
6803 cp_parser_binary_expression (cp_parser
* parser
, bool cast_p
,
6804 bool no_toplevel_fold_p
,
6805 enum cp_parser_prec prec
,
6808 cp_parser_expression_stack stack
;
6809 cp_parser_expression_stack_entry
*sp
= &stack
[0];
6812 enum tree_code tree_type
, lhs_type
, rhs_type
;
6813 enum cp_parser_prec new_prec
, lookahead_prec
;
6816 /* Parse the first expression. */
6817 lhs
= cp_parser_cast_expression (parser
, /*address_p=*/false, cast_p
, pidk
);
6818 lhs_type
= ERROR_MARK
;
6822 /* Get an operator token. */
6823 token
= cp_lexer_peek_token (parser
->lexer
);
6825 if (warn_cxx0x_compat
6826 && token
->type
== CPP_RSHIFT
6827 && !parser
->greater_than_is_operator_p
)
6829 if (warning_at (token
->location
, OPT_Wc__0x_compat
,
6830 "%<>>%> operator will be treated as"
6831 " two right angle brackets in C++0x"))
6832 inform (token
->location
,
6833 "suggest parentheses around %<>>%> expression");
6836 new_prec
= TOKEN_PRECEDENCE (token
);
6838 /* Popping an entry off the stack means we completed a subexpression:
6839 - either we found a token which is not an operator (`>' where it is not
6840 an operator, or prec == PREC_NOT_OPERATOR), in which case popping
6841 will happen repeatedly;
6842 - or, we found an operator which has lower priority. This is the case
6843 where the recursive descent *ascends*, as in `3 * 4 + 5' after
6845 if (new_prec
<= prec
)
6854 tree_type
= binops_by_token
[token
->type
].tree_type
;
6856 /* We used the operator token. */
6857 cp_lexer_consume_token (parser
->lexer
);
6859 /* For "false && x" or "true || x", x will never be executed;
6860 disable warnings while evaluating it. */
6861 if (tree_type
== TRUTH_ANDIF_EXPR
)
6862 c_inhibit_evaluation_warnings
+= lhs
== truthvalue_false_node
;
6863 else if (tree_type
== TRUTH_ORIF_EXPR
)
6864 c_inhibit_evaluation_warnings
+= lhs
== truthvalue_true_node
;
6866 /* Extract another operand. It may be the RHS of this expression
6867 or the LHS of a new, higher priority expression. */
6868 rhs
= cp_parser_simple_cast_expression (parser
);
6869 rhs_type
= ERROR_MARK
;
6871 /* Get another operator token. Look up its precedence to avoid
6872 building a useless (immediately popped) stack entry for common
6873 cases such as 3 + 4 + 5 or 3 * 4 + 5. */
6874 token
= cp_lexer_peek_token (parser
->lexer
);
6875 lookahead_prec
= TOKEN_PRECEDENCE (token
);
6876 if (lookahead_prec
> new_prec
)
6878 /* ... and prepare to parse the RHS of the new, higher priority
6879 expression. Since precedence levels on the stack are
6880 monotonically increasing, we do not have to care about
6883 sp
->tree_type
= tree_type
;
6885 sp
->lhs_type
= lhs_type
;
6888 lhs_type
= rhs_type
;
6890 new_prec
= lookahead_prec
;
6894 lookahead_prec
= new_prec
;
6895 /* If the stack is not empty, we have parsed into LHS the right side
6896 (`4' in the example above) of an expression we had suspended.
6897 We can use the information on the stack to recover the LHS (`3')
6898 from the stack together with the tree code (`MULT_EXPR'), and
6899 the precedence of the higher level subexpression
6900 (`PREC_ADDITIVE_EXPRESSION'). TOKEN is the CPP_PLUS token,
6901 which will be used to actually build the additive expression. */
6904 tree_type
= sp
->tree_type
;
6906 rhs_type
= lhs_type
;
6908 lhs_type
= sp
->lhs_type
;
6911 /* Undo the disabling of warnings done above. */
6912 if (tree_type
== TRUTH_ANDIF_EXPR
)
6913 c_inhibit_evaluation_warnings
-= lhs
== truthvalue_false_node
;
6914 else if (tree_type
== TRUTH_ORIF_EXPR
)
6915 c_inhibit_evaluation_warnings
-= lhs
== truthvalue_true_node
;
6917 overloaded_p
= false;
6918 /* ??? Currently we pass lhs_type == ERROR_MARK and rhs_type ==
6919 ERROR_MARK for everything that is not a binary expression.
6920 This makes warn_about_parentheses miss some warnings that
6921 involve unary operators. For unary expressions we should
6922 pass the correct tree_code unless the unary expression was
6923 surrounded by parentheses.
6925 if (no_toplevel_fold_p
6926 && lookahead_prec
<= prec
6928 && TREE_CODE_CLASS (tree_type
) == tcc_comparison
)
6929 lhs
= build2 (tree_type
, boolean_type_node
, lhs
, rhs
);
6931 lhs
= build_x_binary_op (tree_type
, lhs
, lhs_type
, rhs
, rhs_type
,
6932 &overloaded_p
, tf_warning_or_error
);
6933 lhs_type
= tree_type
;
6935 /* If the binary operator required the use of an overloaded operator,
6936 then this expression cannot be an integral constant-expression.
6937 An overloaded operator can be used even if both operands are
6938 otherwise permissible in an integral constant-expression if at
6939 least one of the operands is of enumeration type. */
6942 && cp_parser_non_integral_constant_expression (parser
,
6944 return error_mark_node
;
6951 /* Parse the `? expression : assignment-expression' part of a
6952 conditional-expression. The LOGICAL_OR_EXPR is the
6953 logical-or-expression that started the conditional-expression.
6954 Returns a representation of the entire conditional-expression.
6956 This routine is used by cp_parser_assignment_expression.
6958 ? expression : assignment-expression
6962 ? : assignment-expression */
6965 cp_parser_question_colon_clause (cp_parser
* parser
, tree logical_or_expr
)
6968 tree assignment_expr
;
6969 struct cp_token
*token
;
6971 /* Consume the `?' token. */
6972 cp_lexer_consume_token (parser
->lexer
);
6973 token
= cp_lexer_peek_token (parser
->lexer
);
6974 if (cp_parser_allow_gnu_extensions_p (parser
)
6975 && token
->type
== CPP_COLON
)
6977 pedwarn (token
->location
, OPT_pedantic
,
6978 "ISO C++ does not allow ?: with omitted middle operand");
6979 /* Implicit true clause. */
6981 c_inhibit_evaluation_warnings
+= logical_or_expr
== truthvalue_true_node
;
6982 warn_for_omitted_condop (token
->location
, logical_or_expr
);
6986 bool saved_colon_corrects_to_scope_p
= parser
->colon_corrects_to_scope_p
;
6987 parser
->colon_corrects_to_scope_p
= false;
6988 /* Parse the expression. */
6989 c_inhibit_evaluation_warnings
+= logical_or_expr
== truthvalue_false_node
;
6990 expr
= cp_parser_expression (parser
, /*cast_p=*/false, NULL
);
6991 c_inhibit_evaluation_warnings
+=
6992 ((logical_or_expr
== truthvalue_true_node
)
6993 - (logical_or_expr
== truthvalue_false_node
));
6994 parser
->colon_corrects_to_scope_p
= saved_colon_corrects_to_scope_p
;
6997 /* The next token should be a `:'. */
6998 cp_parser_require (parser
, CPP_COLON
, RT_COLON
);
6999 /* Parse the assignment-expression. */
7000 assignment_expr
= cp_parser_assignment_expression (parser
, /*cast_p=*/false, NULL
);
7001 c_inhibit_evaluation_warnings
-= logical_or_expr
== truthvalue_true_node
;
7003 /* Build the conditional-expression. */
7004 return build_x_conditional_expr (logical_or_expr
,
7007 tf_warning_or_error
);
7010 /* Parse an assignment-expression.
7012 assignment-expression:
7013 conditional-expression
7014 logical-or-expression assignment-operator assignment_expression
7017 CAST_P is true if this expression is the target of a cast.
7019 Returns a representation for the expression. */
7022 cp_parser_assignment_expression (cp_parser
* parser
, bool cast_p
,
7027 /* If the next token is the `throw' keyword, then we're looking at
7028 a throw-expression. */
7029 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_THROW
))
7030 expr
= cp_parser_throw_expression (parser
);
7031 /* Otherwise, it must be that we are looking at a
7032 logical-or-expression. */
7035 /* Parse the binary expressions (logical-or-expression). */
7036 expr
= cp_parser_binary_expression (parser
, cast_p
, false,
7037 PREC_NOT_OPERATOR
, pidk
);
7038 /* If the next token is a `?' then we're actually looking at a
7039 conditional-expression. */
7040 if (cp_lexer_next_token_is (parser
->lexer
, CPP_QUERY
))
7041 return cp_parser_question_colon_clause (parser
, expr
);
7044 enum tree_code assignment_operator
;
7046 /* If it's an assignment-operator, we're using the second
7049 = cp_parser_assignment_operator_opt (parser
);
7050 if (assignment_operator
!= ERROR_MARK
)
7052 bool non_constant_p
;
7054 /* Parse the right-hand side of the assignment. */
7055 tree rhs
= cp_parser_initializer_clause (parser
, &non_constant_p
);
7057 if (BRACE_ENCLOSED_INITIALIZER_P (rhs
))
7058 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
7060 /* An assignment may not appear in a
7061 constant-expression. */
7062 if (cp_parser_non_integral_constant_expression (parser
,
7064 return error_mark_node
;
7065 /* Build the assignment expression. */
7066 expr
= build_x_modify_expr (expr
,
7067 assignment_operator
,
7069 tf_warning_or_error
);
7077 /* Parse an (optional) assignment-operator.
7079 assignment-operator: one of
7080 = *= /= %= += -= >>= <<= &= ^= |=
7084 assignment-operator: one of
7087 If the next token is an assignment operator, the corresponding tree
7088 code is returned, and the token is consumed. For example, for
7089 `+=', PLUS_EXPR is returned. For `=' itself, the code returned is
7090 NOP_EXPR. For `/', TRUNC_DIV_EXPR is returned; for `%',
7091 TRUNC_MOD_EXPR is returned. If TOKEN is not an assignment
7092 operator, ERROR_MARK is returned. */
7094 static enum tree_code
7095 cp_parser_assignment_operator_opt (cp_parser
* parser
)
7100 /* Peek at the next token. */
7101 token
= cp_lexer_peek_token (parser
->lexer
);
7103 switch (token
->type
)
7114 op
= TRUNC_DIV_EXPR
;
7118 op
= TRUNC_MOD_EXPR
;
7150 /* Nothing else is an assignment operator. */
7154 /* If it was an assignment operator, consume it. */
7155 if (op
!= ERROR_MARK
)
7156 cp_lexer_consume_token (parser
->lexer
);
7161 /* Parse an expression.
7164 assignment-expression
7165 expression , assignment-expression
7167 CAST_P is true if this expression is the target of a cast.
7169 Returns a representation of the expression. */
7172 cp_parser_expression (cp_parser
* parser
, bool cast_p
, cp_id_kind
* pidk
)
7174 tree expression
= NULL_TREE
;
7178 tree assignment_expression
;
7180 /* Parse the next assignment-expression. */
7181 assignment_expression
7182 = cp_parser_assignment_expression (parser
, cast_p
, pidk
);
7183 /* If this is the first assignment-expression, we can just
7186 expression
= assignment_expression
;
7188 expression
= build_x_compound_expr (expression
,
7189 assignment_expression
,
7190 tf_warning_or_error
);
7191 /* If the next token is not a comma, then we are done with the
7193 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COMMA
))
7195 /* Consume the `,'. */
7196 cp_lexer_consume_token (parser
->lexer
);
7197 /* A comma operator cannot appear in a constant-expression. */
7198 if (cp_parser_non_integral_constant_expression (parser
, NIC_COMMA
))
7199 expression
= error_mark_node
;
7205 /* Parse a constant-expression.
7207 constant-expression:
7208 conditional-expression
7210 If ALLOW_NON_CONSTANT_P a non-constant expression is silently
7211 accepted. If ALLOW_NON_CONSTANT_P is true and the expression is not
7212 constant, *NON_CONSTANT_P is set to TRUE. If ALLOW_NON_CONSTANT_P
7213 is false, NON_CONSTANT_P should be NULL. */
7216 cp_parser_constant_expression (cp_parser
* parser
,
7217 bool allow_non_constant_p
,
7218 bool *non_constant_p
)
7220 bool saved_integral_constant_expression_p
;
7221 bool saved_allow_non_integral_constant_expression_p
;
7222 bool saved_non_integral_constant_expression_p
;
7225 /* It might seem that we could simply parse the
7226 conditional-expression, and then check to see if it were
7227 TREE_CONSTANT. However, an expression that is TREE_CONSTANT is
7228 one that the compiler can figure out is constant, possibly after
7229 doing some simplifications or optimizations. The standard has a
7230 precise definition of constant-expression, and we must honor
7231 that, even though it is somewhat more restrictive.
7237 is not a legal declaration, because `(2, 3)' is not a
7238 constant-expression. The `,' operator is forbidden in a
7239 constant-expression. However, GCC's constant-folding machinery
7240 will fold this operation to an INTEGER_CST for `3'. */
7242 /* Save the old settings. */
7243 saved_integral_constant_expression_p
= parser
->integral_constant_expression_p
;
7244 saved_allow_non_integral_constant_expression_p
7245 = parser
->allow_non_integral_constant_expression_p
;
7246 saved_non_integral_constant_expression_p
= parser
->non_integral_constant_expression_p
;
7247 /* We are now parsing a constant-expression. */
7248 parser
->integral_constant_expression_p
= true;
7249 parser
->allow_non_integral_constant_expression_p
7250 = (allow_non_constant_p
|| cxx_dialect
>= cxx0x
);
7251 parser
->non_integral_constant_expression_p
= false;
7252 /* Although the grammar says "conditional-expression", we parse an
7253 "assignment-expression", which also permits "throw-expression"
7254 and the use of assignment operators. In the case that
7255 ALLOW_NON_CONSTANT_P is false, we get better errors than we would
7256 otherwise. In the case that ALLOW_NON_CONSTANT_P is true, it is
7257 actually essential that we look for an assignment-expression.
7258 For example, cp_parser_initializer_clauses uses this function to
7259 determine whether a particular assignment-expression is in fact
7261 expression
= cp_parser_assignment_expression (parser
, /*cast_p=*/false, NULL
);
7262 /* Restore the old settings. */
7263 parser
->integral_constant_expression_p
7264 = saved_integral_constant_expression_p
;
7265 parser
->allow_non_integral_constant_expression_p
7266 = saved_allow_non_integral_constant_expression_p
;
7267 if (allow_non_constant_p
)
7268 *non_constant_p
= parser
->non_integral_constant_expression_p
;
7269 else if (parser
->non_integral_constant_expression_p
7270 && cxx_dialect
< cxx0x
)
7271 expression
= error_mark_node
;
7272 parser
->non_integral_constant_expression_p
7273 = saved_non_integral_constant_expression_p
;
7278 /* Parse __builtin_offsetof.
7280 offsetof-expression:
7281 "__builtin_offsetof" "(" type-id "," offsetof-member-designator ")"
7283 offsetof-member-designator:
7285 | offsetof-member-designator "." id-expression
7286 | offsetof-member-designator "[" expression "]"
7287 | offsetof-member-designator "->" id-expression */
7290 cp_parser_builtin_offsetof (cp_parser
*parser
)
7292 int save_ice_p
, save_non_ice_p
;
7297 /* We're about to accept non-integral-constant things, but will
7298 definitely yield an integral constant expression. Save and
7299 restore these values around our local parsing. */
7300 save_ice_p
= parser
->integral_constant_expression_p
;
7301 save_non_ice_p
= parser
->non_integral_constant_expression_p
;
7303 /* Consume the "__builtin_offsetof" token. */
7304 cp_lexer_consume_token (parser
->lexer
);
7305 /* Consume the opening `('. */
7306 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
7307 /* Parse the type-id. */
7308 type
= cp_parser_type_id (parser
);
7309 /* Look for the `,'. */
7310 cp_parser_require (parser
, CPP_COMMA
, RT_COMMA
);
7311 token
= cp_lexer_peek_token (parser
->lexer
);
7313 /* Build the (type *)null that begins the traditional offsetof macro. */
7314 expr
= build_static_cast (build_pointer_type (type
), null_pointer_node
,
7315 tf_warning_or_error
);
7317 /* Parse the offsetof-member-designator. We begin as if we saw "expr->". */
7318 expr
= cp_parser_postfix_dot_deref_expression (parser
, CPP_DEREF
, expr
,
7319 true, &dummy
, token
->location
);
7322 token
= cp_lexer_peek_token (parser
->lexer
);
7323 switch (token
->type
)
7325 case CPP_OPEN_SQUARE
:
7326 /* offsetof-member-designator "[" expression "]" */
7327 expr
= cp_parser_postfix_open_square_expression (parser
, expr
, true);
7331 /* offsetof-member-designator "->" identifier */
7332 expr
= grok_array_decl (expr
, integer_zero_node
);
7336 /* offsetof-member-designator "." identifier */
7337 cp_lexer_consume_token (parser
->lexer
);
7338 expr
= cp_parser_postfix_dot_deref_expression (parser
, CPP_DOT
,
7343 case CPP_CLOSE_PAREN
:
7344 /* Consume the ")" token. */
7345 cp_lexer_consume_token (parser
->lexer
);
7349 /* Error. We know the following require will fail, but
7350 that gives the proper error message. */
7351 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
7352 cp_parser_skip_to_closing_parenthesis (parser
, true, false, true);
7353 expr
= error_mark_node
;
7359 /* If we're processing a template, we can't finish the semantics yet.
7360 Otherwise we can fold the entire expression now. */
7361 if (processing_template_decl
)
7362 expr
= build1 (OFFSETOF_EXPR
, size_type_node
, expr
);
7364 expr
= finish_offsetof (expr
);
7367 parser
->integral_constant_expression_p
= save_ice_p
;
7368 parser
->non_integral_constant_expression_p
= save_non_ice_p
;
7373 /* Parse a trait expression. */
7376 cp_parser_trait_expr (cp_parser
* parser
, enum rid keyword
)
7379 tree type1
, type2
= NULL_TREE
;
7380 bool binary
= false;
7381 cp_decl_specifier_seq decl_specs
;
7385 case RID_HAS_NOTHROW_ASSIGN
:
7386 kind
= CPTK_HAS_NOTHROW_ASSIGN
;
7388 case RID_HAS_NOTHROW_CONSTRUCTOR
:
7389 kind
= CPTK_HAS_NOTHROW_CONSTRUCTOR
;
7391 case RID_HAS_NOTHROW_COPY
:
7392 kind
= CPTK_HAS_NOTHROW_COPY
;
7394 case RID_HAS_TRIVIAL_ASSIGN
:
7395 kind
= CPTK_HAS_TRIVIAL_ASSIGN
;
7397 case RID_HAS_TRIVIAL_CONSTRUCTOR
:
7398 kind
= CPTK_HAS_TRIVIAL_CONSTRUCTOR
;
7400 case RID_HAS_TRIVIAL_COPY
:
7401 kind
= CPTK_HAS_TRIVIAL_COPY
;
7403 case RID_HAS_TRIVIAL_DESTRUCTOR
:
7404 kind
= CPTK_HAS_TRIVIAL_DESTRUCTOR
;
7406 case RID_HAS_VIRTUAL_DESTRUCTOR
:
7407 kind
= CPTK_HAS_VIRTUAL_DESTRUCTOR
;
7409 case RID_IS_ABSTRACT
:
7410 kind
= CPTK_IS_ABSTRACT
;
7412 case RID_IS_BASE_OF
:
7413 kind
= CPTK_IS_BASE_OF
;
7417 kind
= CPTK_IS_CLASS
;
7419 case RID_IS_CONVERTIBLE_TO
:
7420 kind
= CPTK_IS_CONVERTIBLE_TO
;
7424 kind
= CPTK_IS_EMPTY
;
7427 kind
= CPTK_IS_ENUM
;
7432 case RID_IS_POLYMORPHIC
:
7433 kind
= CPTK_IS_POLYMORPHIC
;
7435 case RID_IS_STD_LAYOUT
:
7436 kind
= CPTK_IS_STD_LAYOUT
;
7438 case RID_IS_TRIVIAL
:
7439 kind
= CPTK_IS_TRIVIAL
;
7442 kind
= CPTK_IS_UNION
;
7444 case RID_IS_LITERAL_TYPE
:
7445 kind
= CPTK_IS_LITERAL_TYPE
;
7451 /* Consume the token. */
7452 cp_lexer_consume_token (parser
->lexer
);
7454 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
7456 type1
= cp_parser_type_id (parser
);
7458 if (type1
== error_mark_node
)
7459 return error_mark_node
;
7461 /* Build a trivial decl-specifier-seq. */
7462 clear_decl_specs (&decl_specs
);
7463 decl_specs
.type
= type1
;
7465 /* Call grokdeclarator to figure out what type this is. */
7466 type1
= grokdeclarator (NULL
, &decl_specs
, TYPENAME
,
7467 /*initialized=*/0, /*attrlist=*/NULL
);
7471 cp_parser_require (parser
, CPP_COMMA
, RT_COMMA
);
7473 type2
= cp_parser_type_id (parser
);
7475 if (type2
== error_mark_node
)
7476 return error_mark_node
;
7478 /* Build a trivial decl-specifier-seq. */
7479 clear_decl_specs (&decl_specs
);
7480 decl_specs
.type
= type2
;
7482 /* Call grokdeclarator to figure out what type this is. */
7483 type2
= grokdeclarator (NULL
, &decl_specs
, TYPENAME
,
7484 /*initialized=*/0, /*attrlist=*/NULL
);
7487 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
7489 /* Complete the trait expression, which may mean either processing
7490 the trait expr now or saving it for template instantiation. */
7491 return finish_trait_expr (kind
, type1
, type2
);
7494 /* Lambdas that appear in variable initializer or default argument scope
7495 get that in their mangling, so we need to record it. We might as well
7496 use the count for function and namespace scopes as well. */
7497 static GTY(()) tree lambda_scope
;
7498 static GTY(()) int lambda_count
;
7499 typedef struct GTY(()) tree_int
7504 DEF_VEC_O(tree_int
);
7505 DEF_VEC_ALLOC_O(tree_int
,gc
);
7506 static GTY(()) VEC(tree_int
,gc
) *lambda_scope_stack
;
7509 start_lambda_scope (tree decl
)
7513 /* Once we're inside a function, we ignore other scopes and just push
7514 the function again so that popping works properly. */
7515 if (current_function_decl
&& TREE_CODE (decl
) != FUNCTION_DECL
)
7516 decl
= current_function_decl
;
7517 ti
.t
= lambda_scope
;
7518 ti
.i
= lambda_count
;
7519 VEC_safe_push (tree_int
, gc
, lambda_scope_stack
, &ti
);
7520 if (lambda_scope
!= decl
)
7522 /* Don't reset the count if we're still in the same function. */
7523 lambda_scope
= decl
;
7529 record_lambda_scope (tree lambda
)
7531 LAMBDA_EXPR_EXTRA_SCOPE (lambda
) = lambda_scope
;
7532 LAMBDA_EXPR_DISCRIMINATOR (lambda
) = lambda_count
++;
7536 finish_lambda_scope (void)
7538 tree_int
*p
= VEC_last (tree_int
, lambda_scope_stack
);
7539 if (lambda_scope
!= p
->t
)
7541 lambda_scope
= p
->t
;
7542 lambda_count
= p
->i
;
7544 VEC_pop (tree_int
, lambda_scope_stack
);
7547 /* Parse a lambda expression.
7550 lambda-introducer lambda-declarator [opt] compound-statement
7552 Returns a representation of the expression. */
7555 cp_parser_lambda_expression (cp_parser
* parser
)
7557 tree lambda_expr
= build_lambda_expr ();
7560 LAMBDA_EXPR_LOCATION (lambda_expr
)
7561 = cp_lexer_peek_token (parser
->lexer
)->location
;
7563 if (cp_unevaluated_operand
)
7564 error_at (LAMBDA_EXPR_LOCATION (lambda_expr
),
7565 "lambda-expression in unevaluated context");
7567 /* We may be in the middle of deferred access check. Disable
7569 push_deferring_access_checks (dk_no_deferred
);
7571 cp_parser_lambda_introducer (parser
, lambda_expr
);
7573 type
= begin_lambda_type (lambda_expr
);
7575 record_lambda_scope (lambda_expr
);
7577 /* Do this again now that LAMBDA_EXPR_EXTRA_SCOPE is set. */
7578 determine_visibility (TYPE_NAME (type
));
7580 /* Now that we've started the type, add the capture fields for any
7581 explicit captures. */
7582 register_capture_members (LAMBDA_EXPR_CAPTURE_LIST (lambda_expr
));
7585 /* Inside the class, surrounding template-parameter-lists do not apply. */
7586 unsigned int saved_num_template_parameter_lists
7587 = parser
->num_template_parameter_lists
;
7589 parser
->num_template_parameter_lists
= 0;
7591 /* By virtue of defining a local class, a lambda expression has access to
7592 the private variables of enclosing classes. */
7594 cp_parser_lambda_declarator_opt (parser
, lambda_expr
);
7596 cp_parser_lambda_body (parser
, lambda_expr
);
7598 /* The capture list was built up in reverse order; fix that now. */
7600 tree newlist
= NULL_TREE
;
7603 for (elt
= LAMBDA_EXPR_CAPTURE_LIST (lambda_expr
);
7606 tree field
= TREE_PURPOSE (elt
);
7609 next
= TREE_CHAIN (elt
);
7610 TREE_CHAIN (elt
) = newlist
;
7613 /* Also add __ to the beginning of the field name so that code
7614 outside the lambda body can't see the captured name. We could
7615 just remove the name entirely, but this is more useful for
7617 if (field
== LAMBDA_EXPR_THIS_CAPTURE (lambda_expr
))
7618 /* The 'this' capture already starts with __. */
7621 buf
= (char *) alloca (IDENTIFIER_LENGTH (DECL_NAME (field
)) + 3);
7622 buf
[1] = buf
[0] = '_';
7623 memcpy (buf
+ 2, IDENTIFIER_POINTER (DECL_NAME (field
)),
7624 IDENTIFIER_LENGTH (DECL_NAME (field
)) + 1);
7625 DECL_NAME (field
) = get_identifier (buf
);
7627 LAMBDA_EXPR_CAPTURE_LIST (lambda_expr
) = newlist
;
7630 maybe_add_lambda_conv_op (type
);
7632 type
= finish_struct (type
, /*attributes=*/NULL_TREE
);
7634 parser
->num_template_parameter_lists
= saved_num_template_parameter_lists
;
7637 pop_deferring_access_checks ();
7639 return build_lambda_object (lambda_expr
);
7642 /* Parse the beginning of a lambda expression.
7645 [ lambda-capture [opt] ]
7647 LAMBDA_EXPR is the current representation of the lambda expression. */
7650 cp_parser_lambda_introducer (cp_parser
* parser
, tree lambda_expr
)
7652 /* Need commas after the first capture. */
7655 /* Eat the leading `['. */
7656 cp_parser_require (parser
, CPP_OPEN_SQUARE
, RT_OPEN_SQUARE
);
7658 /* Record default capture mode. "[&" "[=" "[&," "[=," */
7659 if (cp_lexer_next_token_is (parser
->lexer
, CPP_AND
)
7660 && cp_lexer_peek_nth_token (parser
->lexer
, 2)->type
!= CPP_NAME
)
7661 LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr
) = CPLD_REFERENCE
;
7662 else if (cp_lexer_next_token_is (parser
->lexer
, CPP_EQ
))
7663 LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr
) = CPLD_COPY
;
7665 if (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr
) != CPLD_NONE
)
7667 cp_lexer_consume_token (parser
->lexer
);
7671 while (cp_lexer_next_token_is_not (parser
->lexer
, CPP_CLOSE_SQUARE
))
7673 cp_token
* capture_token
;
7675 tree capture_init_expr
;
7676 cp_id_kind idk
= CP_ID_KIND_NONE
;
7677 bool explicit_init_p
= false;
7679 enum capture_kind_type
7684 enum capture_kind_type capture_kind
= BY_COPY
;
7686 if (cp_lexer_next_token_is (parser
->lexer
, CPP_EOF
))
7688 error ("expected end of capture-list");
7695 cp_parser_require (parser
, CPP_COMMA
, RT_COMMA
);
7697 /* Possibly capture `this'. */
7698 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_THIS
))
7700 cp_lexer_consume_token (parser
->lexer
);
7701 add_capture (lambda_expr
,
7702 /*id=*/get_identifier ("__this"),
7703 /*initializer=*/finish_this_expr(),
7704 /*by_reference_p=*/false,
7709 /* Remember whether we want to capture as a reference or not. */
7710 if (cp_lexer_next_token_is (parser
->lexer
, CPP_AND
))
7712 capture_kind
= BY_REFERENCE
;
7713 cp_lexer_consume_token (parser
->lexer
);
7716 /* Get the identifier. */
7717 capture_token
= cp_lexer_peek_token (parser
->lexer
);
7718 capture_id
= cp_parser_identifier (parser
);
7720 if (capture_id
== error_mark_node
)
7721 /* Would be nice to have a cp_parser_skip_to_closing_x for general
7722 delimiters, but I modified this to stop on unnested ']' as well. It
7723 was already changed to stop on unnested '}', so the
7724 "closing_parenthesis" name is no more misleading with my change. */
7726 cp_parser_skip_to_closing_parenthesis (parser
,
7727 /*recovering=*/true,
7729 /*consume_paren=*/true);
7733 /* Find the initializer for this capture. */
7734 if (cp_lexer_next_token_is (parser
->lexer
, CPP_EQ
))
7736 /* An explicit expression exists. */
7737 cp_lexer_consume_token (parser
->lexer
);
7738 pedwarn (input_location
, OPT_pedantic
,
7739 "ISO C++ does not allow initializers "
7740 "in lambda expression capture lists");
7741 capture_init_expr
= cp_parser_assignment_expression (parser
,
7744 explicit_init_p
= true;
7748 const char* error_msg
;
7750 /* Turn the identifier into an id-expression. */
7752 = cp_parser_lookup_name
7756 /*is_template=*/false,
7757 /*is_namespace=*/false,
7758 /*check_dependency=*/true,
7759 /*ambiguous_decls=*/NULL
,
7760 capture_token
->location
);
7763 = finish_id_expression
7768 /*integral_constant_expression_p=*/false,
7769 /*allow_non_integral_constant_expression_p=*/false,
7770 /*non_integral_constant_expression_p=*/NULL
,
7771 /*template_p=*/false,
7773 /*address_p=*/false,
7774 /*template_arg_p=*/false,
7776 capture_token
->location
);
7779 if (TREE_CODE (capture_init_expr
) == IDENTIFIER_NODE
)
7781 = unqualified_name_lookup_error (capture_init_expr
);
7783 add_capture (lambda_expr
,
7786 /*by_reference_p=*/capture_kind
== BY_REFERENCE
,
7790 cp_parser_require (parser
, CPP_CLOSE_SQUARE
, RT_CLOSE_SQUARE
);
7793 /* Parse the (optional) middle of a lambda expression.
7796 ( parameter-declaration-clause [opt] )
7797 attribute-specifier [opt]
7799 exception-specification [opt]
7800 lambda-return-type-clause [opt]
7802 LAMBDA_EXPR is the current representation of the lambda expression. */
7805 cp_parser_lambda_declarator_opt (cp_parser
* parser
, tree lambda_expr
)
7807 /* 5.1.1.4 of the standard says:
7808 If a lambda-expression does not include a lambda-declarator, it is as if
7809 the lambda-declarator were ().
7810 This means an empty parameter list, no attributes, and no exception
7812 tree param_list
= void_list_node
;
7813 tree attributes
= NULL_TREE
;
7814 tree exception_spec
= NULL_TREE
;
7817 /* The lambda-declarator is optional, but must begin with an opening
7818 parenthesis if present. */
7819 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_PAREN
))
7821 cp_lexer_consume_token (parser
->lexer
);
7823 begin_scope (sk_function_parms
, /*entity=*/NULL_TREE
);
7825 /* Parse parameters. */
7826 param_list
= cp_parser_parameter_declaration_clause (parser
);
7828 /* Default arguments shall not be specified in the
7829 parameter-declaration-clause of a lambda-declarator. */
7830 for (t
= param_list
; t
; t
= TREE_CHAIN (t
))
7831 if (TREE_PURPOSE (t
))
7832 pedwarn (DECL_SOURCE_LOCATION (TREE_VALUE (t
)), OPT_pedantic
,
7833 "default argument specified for lambda parameter");
7835 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
7837 attributes
= cp_parser_attributes_opt (parser
);
7839 /* Parse optional `mutable' keyword. */
7840 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_MUTABLE
))
7842 cp_lexer_consume_token (parser
->lexer
);
7843 LAMBDA_EXPR_MUTABLE_P (lambda_expr
) = 1;
7846 /* Parse optional exception specification. */
7847 exception_spec
= cp_parser_exception_specification_opt (parser
);
7849 /* Parse optional trailing return type. */
7850 if (cp_lexer_next_token_is (parser
->lexer
, CPP_DEREF
))
7852 cp_lexer_consume_token (parser
->lexer
);
7853 LAMBDA_EXPR_RETURN_TYPE (lambda_expr
) = cp_parser_type_id (parser
);
7856 /* The function parameters must be in scope all the way until after the
7857 trailing-return-type in case of decltype. */
7858 for (t
= current_binding_level
->names
; t
; t
= DECL_CHAIN (t
))
7859 pop_binding (DECL_NAME (t
), t
);
7864 /* Create the function call operator.
7866 Messing with declarators like this is no uglier than building up the
7867 FUNCTION_DECL by hand, and this is less likely to get out of sync with
7870 cp_decl_specifier_seq return_type_specs
;
7871 cp_declarator
* declarator
;
7876 clear_decl_specs (&return_type_specs
);
7877 if (LAMBDA_EXPR_RETURN_TYPE (lambda_expr
))
7878 return_type_specs
.type
= LAMBDA_EXPR_RETURN_TYPE (lambda_expr
);
7880 /* Maybe we will deduce the return type later, but we can use void
7881 as a placeholder return type anyways. */
7882 return_type_specs
.type
= void_type_node
;
7884 p
= obstack_alloc (&declarator_obstack
, 0);
7886 declarator
= make_id_declarator (NULL_TREE
, ansi_opname (CALL_EXPR
),
7889 quals
= (LAMBDA_EXPR_MUTABLE_P (lambda_expr
)
7890 ? TYPE_UNQUALIFIED
: TYPE_QUAL_CONST
);
7891 declarator
= make_call_declarator (declarator
, param_list
, quals
,
7893 /*late_return_type=*/NULL_TREE
);
7894 declarator
->id_loc
= LAMBDA_EXPR_LOCATION (lambda_expr
);
7896 fco
= grokmethod (&return_type_specs
,
7899 DECL_INITIALIZED_IN_CLASS_P (fco
) = 1;
7900 DECL_ARTIFICIAL (fco
) = 1;
7902 finish_member_declaration (fco
);
7904 obstack_free (&declarator_obstack
, p
);
7908 /* Parse the body of a lambda expression, which is simply
7912 but which requires special handling.
7913 LAMBDA_EXPR is the current representation of the lambda expression. */
7916 cp_parser_lambda_body (cp_parser
* parser
, tree lambda_expr
)
7918 bool nested
= (current_function_decl
!= NULL_TREE
);
7920 push_function_context ();
7922 /* Finish the function call operator
7924 + late_parsing_for_member
7925 + function_definition_after_declarator
7926 + ctor_initializer_opt_and_function_body */
7928 tree fco
= lambda_function (lambda_expr
);
7932 /* Let the front end know that we are going to be defining this
7934 start_preparsed_function (fco
,
7936 SF_PRE_PARSED
| SF_INCLASS_INLINE
);
7938 start_lambda_scope (fco
);
7939 body
= begin_function_body ();
7941 /* 5.1.1.4 of the standard says:
7942 If a lambda-expression does not include a trailing-return-type, it
7943 is as if the trailing-return-type denotes the following type:
7944 * if the compound-statement is of the form
7945 { return attribute-specifier [opt] expression ; }
7946 the type of the returned expression after lvalue-to-rvalue
7947 conversion (_conv.lval_ 4.1), array-to-pointer conversion
7948 (_conv.array_ 4.2), and function-to-pointer conversion
7950 * otherwise, void. */
7952 /* In a lambda that has neither a lambda-return-type-clause
7953 nor a deducible form, errors should be reported for return statements
7954 in the body. Since we used void as the placeholder return type, parsing
7955 the body as usual will give such desired behavior. */
7956 if (!LAMBDA_EXPR_RETURN_TYPE (lambda_expr
)
7957 && cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
)
7958 && cp_lexer_peek_nth_token (parser
->lexer
, 2)->keyword
== RID_RETURN
7959 && cp_lexer_peek_nth_token (parser
->lexer
, 3)->type
!= CPP_SEMICOLON
)
7962 tree expr
= NULL_TREE
;
7963 cp_id_kind idk
= CP_ID_KIND_NONE
;
7965 /* Parse tentatively in case there's more after the initial return
7967 cp_parser_parse_tentatively (parser
);
7969 cp_parser_require (parser
, CPP_OPEN_BRACE
, RT_OPEN_BRACE
);
7970 cp_parser_require_keyword (parser
, RID_RETURN
, RT_RETURN
);
7972 expr
= cp_parser_expression (parser
, /*cast_p=*/false, &idk
);
7974 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
7975 cp_parser_require (parser
, CPP_CLOSE_BRACE
, RT_CLOSE_BRACE
);
7977 if (cp_parser_parse_definitely (parser
))
7979 apply_lambda_return_type (lambda_expr
, lambda_return_type (expr
));
7981 compound_stmt
= begin_compound_stmt (0);
7982 /* Will get error here if type not deduced yet. */
7983 finish_return_stmt (expr
);
7984 finish_compound_stmt (compound_stmt
);
7992 if (!LAMBDA_EXPR_RETURN_TYPE (lambda_expr
))
7993 LAMBDA_EXPR_DEDUCE_RETURN_TYPE_P (lambda_expr
) = true;
7994 /* TODO: does begin_compound_stmt want BCS_FN_BODY?
7995 cp_parser_compound_stmt does not pass it. */
7996 cp_parser_function_body (parser
);
7997 LAMBDA_EXPR_DEDUCE_RETURN_TYPE_P (lambda_expr
) = false;
8000 finish_function_body (body
);
8001 finish_lambda_scope ();
8003 /* Finish the function and generate code for it if necessary. */
8004 expand_or_defer_fn (finish_function (/*inline*/2));
8008 pop_function_context();
8011 /* Statements [gram.stmt.stmt] */
8013 /* Parse a statement.
8017 expression-statement
8022 declaration-statement
8025 IN_COMPOUND is true when the statement is nested inside a
8026 cp_parser_compound_statement; this matters for certain pragmas.
8028 If IF_P is not NULL, *IF_P is set to indicate whether the statement
8029 is a (possibly labeled) if statement which is not enclosed in braces
8030 and has an else clause. This is used to implement -Wparentheses. */
8033 cp_parser_statement (cp_parser
* parser
, tree in_statement_expr
,
8034 bool in_compound
, bool *if_p
)
8038 location_t statement_location
;
8043 /* There is no statement yet. */
8044 statement
= NULL_TREE
;
8045 /* Peek at the next token. */
8046 token
= cp_lexer_peek_token (parser
->lexer
);
8047 /* Remember the location of the first token in the statement. */
8048 statement_location
= token
->location
;
8049 /* If this is a keyword, then that will often determine what kind of
8050 statement we have. */
8051 if (token
->type
== CPP_KEYWORD
)
8053 enum rid keyword
= token
->keyword
;
8059 /* Looks like a labeled-statement with a case label.
8060 Parse the label, and then use tail recursion to parse
8062 cp_parser_label_for_labeled_statement (parser
);
8067 statement
= cp_parser_selection_statement (parser
, if_p
);
8073 statement
= cp_parser_iteration_statement (parser
);
8080 statement
= cp_parser_jump_statement (parser
);
8083 /* Objective-C++ exception-handling constructs. */
8086 case RID_AT_FINALLY
:
8087 case RID_AT_SYNCHRONIZED
:
8089 statement
= cp_parser_objc_statement (parser
);
8093 statement
= cp_parser_try_block (parser
);
8097 /* This must be a namespace alias definition. */
8098 cp_parser_declaration_statement (parser
);
8102 /* It might be a keyword like `int' that can start a
8103 declaration-statement. */
8107 else if (token
->type
== CPP_NAME
)
8109 /* If the next token is a `:', then we are looking at a
8110 labeled-statement. */
8111 token
= cp_lexer_peek_nth_token (parser
->lexer
, 2);
8112 if (token
->type
== CPP_COLON
)
8114 /* Looks like a labeled-statement with an ordinary label.
8115 Parse the label, and then use tail recursion to parse
8117 cp_parser_label_for_labeled_statement (parser
);
8121 /* Anything that starts with a `{' must be a compound-statement. */
8122 else if (token
->type
== CPP_OPEN_BRACE
)
8123 statement
= cp_parser_compound_statement (parser
, NULL
, false);
8124 /* CPP_PRAGMA is a #pragma inside a function body, which constitutes
8125 a statement all its own. */
8126 else if (token
->type
== CPP_PRAGMA
)
8128 /* Only certain OpenMP pragmas are attached to statements, and thus
8129 are considered statements themselves. All others are not. In
8130 the context of a compound, accept the pragma as a "statement" and
8131 return so that we can check for a close brace. Otherwise we
8132 require a real statement and must go back and read one. */
8134 cp_parser_pragma (parser
, pragma_compound
);
8135 else if (!cp_parser_pragma (parser
, pragma_stmt
))
8139 else if (token
->type
== CPP_EOF
)
8141 cp_parser_error (parser
, "expected statement");
8145 /* Everything else must be a declaration-statement or an
8146 expression-statement. Try for the declaration-statement
8147 first, unless we are looking at a `;', in which case we know that
8148 we have an expression-statement. */
8151 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
8153 cp_parser_parse_tentatively (parser
);
8154 /* Try to parse the declaration-statement. */
8155 cp_parser_declaration_statement (parser
);
8156 /* If that worked, we're done. */
8157 if (cp_parser_parse_definitely (parser
))
8160 /* Look for an expression-statement instead. */
8161 statement
= cp_parser_expression_statement (parser
, in_statement_expr
);
8164 /* Set the line number for the statement. */
8165 if (statement
&& STATEMENT_CODE_P (TREE_CODE (statement
)))
8166 SET_EXPR_LOCATION (statement
, statement_location
);
8169 /* Parse the label for a labeled-statement, i.e.
8172 case constant-expression :
8176 case constant-expression ... constant-expression : statement
8178 When a label is parsed without errors, the label is added to the
8179 parse tree by the finish_* functions, so this function doesn't
8180 have to return the label. */
8183 cp_parser_label_for_labeled_statement (cp_parser
* parser
)
8186 tree label
= NULL_TREE
;
8187 bool saved_colon_corrects_to_scope_p
= parser
->colon_corrects_to_scope_p
;
8189 /* The next token should be an identifier. */
8190 token
= cp_lexer_peek_token (parser
->lexer
);
8191 if (token
->type
!= CPP_NAME
8192 && token
->type
!= CPP_KEYWORD
)
8194 cp_parser_error (parser
, "expected labeled-statement");
8198 parser
->colon_corrects_to_scope_p
= false;
8199 switch (token
->keyword
)
8206 /* Consume the `case' token. */
8207 cp_lexer_consume_token (parser
->lexer
);
8208 /* Parse the constant-expression. */
8209 expr
= cp_parser_constant_expression (parser
,
8210 /*allow_non_constant_p=*/false,
8213 ellipsis
= cp_lexer_peek_token (parser
->lexer
);
8214 if (ellipsis
->type
== CPP_ELLIPSIS
)
8216 /* Consume the `...' token. */
8217 cp_lexer_consume_token (parser
->lexer
);
8219 cp_parser_constant_expression (parser
,
8220 /*allow_non_constant_p=*/false,
8222 /* We don't need to emit warnings here, as the common code
8223 will do this for us. */
8226 expr_hi
= NULL_TREE
;
8228 if (parser
->in_switch_statement_p
)
8229 finish_case_label (token
->location
, expr
, expr_hi
);
8231 error_at (token
->location
,
8232 "case label %qE not within a switch statement",
8238 /* Consume the `default' token. */
8239 cp_lexer_consume_token (parser
->lexer
);
8241 if (parser
->in_switch_statement_p
)
8242 finish_case_label (token
->location
, NULL_TREE
, NULL_TREE
);
8244 error_at (token
->location
, "case label not within a switch statement");
8248 /* Anything else must be an ordinary label. */
8249 label
= finish_label_stmt (cp_parser_identifier (parser
));
8253 /* Require the `:' token. */
8254 cp_parser_require (parser
, CPP_COLON
, RT_COLON
);
8256 /* An ordinary label may optionally be followed by attributes.
8257 However, this is only permitted if the attributes are then
8258 followed by a semicolon. This is because, for backward
8259 compatibility, when parsing
8260 lab: __attribute__ ((unused)) int i;
8261 we want the attribute to attach to "i", not "lab". */
8262 if (label
!= NULL_TREE
8263 && cp_lexer_next_token_is_keyword (parser
->lexer
, RID_ATTRIBUTE
))
8267 cp_parser_parse_tentatively (parser
);
8268 attrs
= cp_parser_attributes_opt (parser
);
8269 if (attrs
== NULL_TREE
8270 || cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
8271 cp_parser_abort_tentative_parse (parser
);
8272 else if (!cp_parser_parse_definitely (parser
))
8275 cplus_decl_attributes (&label
, attrs
, 0);
8278 parser
->colon_corrects_to_scope_p
= saved_colon_corrects_to_scope_p
;
8281 /* Parse an expression-statement.
8283 expression-statement:
8286 Returns the new EXPR_STMT -- or NULL_TREE if the expression
8287 statement consists of nothing more than an `;'. IN_STATEMENT_EXPR_P
8288 indicates whether this expression-statement is part of an
8289 expression statement. */
8292 cp_parser_expression_statement (cp_parser
* parser
, tree in_statement_expr
)
8294 tree statement
= NULL_TREE
;
8295 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
8297 /* If the next token is a ';', then there is no expression
8299 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
8300 statement
= cp_parser_expression (parser
, /*cast_p=*/false, NULL
);
8302 /* Give a helpful message for "A<T>::type t;" and the like. */
8303 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
)
8304 && !cp_parser_uncommitted_to_tentative_parse_p (parser
))
8306 if (TREE_CODE (statement
) == SCOPE_REF
)
8307 error_at (token
->location
, "need %<typename%> before %qE because "
8308 "%qT is a dependent scope",
8309 statement
, TREE_OPERAND (statement
, 0));
8310 else if (is_overloaded_fn (statement
)
8311 && DECL_CONSTRUCTOR_P (get_first_fn (statement
)))
8314 tree fn
= get_first_fn (statement
);
8315 error_at (token
->location
,
8316 "%<%T::%D%> names the constructor, not the type",
8317 DECL_CONTEXT (fn
), DECL_NAME (fn
));
8321 /* Consume the final `;'. */
8322 cp_parser_consume_semicolon_at_end_of_statement (parser
);
8324 if (in_statement_expr
8325 && cp_lexer_next_token_is (parser
->lexer
, CPP_CLOSE_BRACE
))
8326 /* This is the final expression statement of a statement
8328 statement
= finish_stmt_expr_expr (statement
, in_statement_expr
);
8330 statement
= finish_expr_stmt (statement
);
8337 /* Parse a compound-statement.
8340 { statement-seq [opt] }
8345 { label-declaration-seq [opt] statement-seq [opt] }
8347 label-declaration-seq:
8349 label-declaration-seq label-declaration
8351 Returns a tree representing the statement. */
8354 cp_parser_compound_statement (cp_parser
*parser
, tree in_statement_expr
,
8359 /* Consume the `{'. */
8360 if (!cp_parser_require (parser
, CPP_OPEN_BRACE
, RT_OPEN_BRACE
))
8361 return error_mark_node
;
8362 /* Begin the compound-statement. */
8363 compound_stmt
= begin_compound_stmt (in_try
? BCS_TRY_BLOCK
: 0);
8364 /* If the next keyword is `__label__' we have a label declaration. */
8365 while (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_LABEL
))
8366 cp_parser_label_declaration (parser
);
8367 /* Parse an (optional) statement-seq. */
8368 cp_parser_statement_seq_opt (parser
, in_statement_expr
);
8369 /* Finish the compound-statement. */
8370 finish_compound_stmt (compound_stmt
);
8371 /* Consume the `}'. */
8372 cp_parser_require (parser
, CPP_CLOSE_BRACE
, RT_CLOSE_BRACE
);
8374 return compound_stmt
;
8377 /* Parse an (optional) statement-seq.
8381 statement-seq [opt] statement */
8384 cp_parser_statement_seq_opt (cp_parser
* parser
, tree in_statement_expr
)
8386 /* Scan statements until there aren't any more. */
8389 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
8391 /* If we are looking at a `}', then we have run out of
8392 statements; the same is true if we have reached the end
8393 of file, or have stumbled upon a stray '@end'. */
8394 if (token
->type
== CPP_CLOSE_BRACE
8395 || token
->type
== CPP_EOF
8396 || token
->type
== CPP_PRAGMA_EOL
8397 || (token
->type
== CPP_KEYWORD
&& token
->keyword
== RID_AT_END
))
8400 /* If we are in a compound statement and find 'else' then
8401 something went wrong. */
8402 else if (token
->type
== CPP_KEYWORD
&& token
->keyword
== RID_ELSE
)
8404 if (parser
->in_statement
& IN_IF_STMT
)
8408 token
= cp_lexer_consume_token (parser
->lexer
);
8409 error_at (token
->location
, "%<else%> without a previous %<if%>");
8413 /* Parse the statement. */
8414 cp_parser_statement (parser
, in_statement_expr
, true, NULL
);
8418 /* Parse a selection-statement.
8420 selection-statement:
8421 if ( condition ) statement
8422 if ( condition ) statement else statement
8423 switch ( condition ) statement
8425 Returns the new IF_STMT or SWITCH_STMT.
8427 If IF_P is not NULL, *IF_P is set to indicate whether the statement
8428 is a (possibly labeled) if statement which is not enclosed in
8429 braces and has an else clause. This is used to implement
8433 cp_parser_selection_statement (cp_parser
* parser
, bool *if_p
)
8441 /* Peek at the next token. */
8442 token
= cp_parser_require (parser
, CPP_KEYWORD
, RT_SELECT
);
8444 /* See what kind of keyword it is. */
8445 keyword
= token
->keyword
;
8454 /* Look for the `('. */
8455 if (!cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
8457 cp_parser_skip_to_end_of_statement (parser
);
8458 return error_mark_node
;
8461 /* Begin the selection-statement. */
8462 if (keyword
== RID_IF
)
8463 statement
= begin_if_stmt ();
8465 statement
= begin_switch_stmt ();
8467 /* Parse the condition. */
8468 condition
= cp_parser_condition (parser
);
8469 /* Look for the `)'. */
8470 if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
8471 cp_parser_skip_to_closing_parenthesis (parser
, true, false,
8472 /*consume_paren=*/true);
8474 if (keyword
== RID_IF
)
8477 unsigned char in_statement
;
8479 /* Add the condition. */
8480 finish_if_stmt_cond (condition
, statement
);
8482 /* Parse the then-clause. */
8483 in_statement
= parser
->in_statement
;
8484 parser
->in_statement
|= IN_IF_STMT
;
8485 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
8487 location_t loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
8488 add_stmt (build_empty_stmt (loc
));
8489 cp_lexer_consume_token (parser
->lexer
);
8490 if (!cp_lexer_next_token_is_keyword (parser
->lexer
, RID_ELSE
))
8491 warning_at (loc
, OPT_Wempty_body
, "suggest braces around "
8492 "empty body in an %<if%> statement");
8496 cp_parser_implicitly_scoped_statement (parser
, &nested_if
);
8497 parser
->in_statement
= in_statement
;
8499 finish_then_clause (statement
);
8501 /* If the next token is `else', parse the else-clause. */
8502 if (cp_lexer_next_token_is_keyword (parser
->lexer
,
8505 /* Consume the `else' keyword. */
8506 cp_lexer_consume_token (parser
->lexer
);
8507 begin_else_clause (statement
);
8508 /* Parse the else-clause. */
8509 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
8512 loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
8514 OPT_Wempty_body
, "suggest braces around "
8515 "empty body in an %<else%> statement");
8516 add_stmt (build_empty_stmt (loc
));
8517 cp_lexer_consume_token (parser
->lexer
);
8520 cp_parser_implicitly_scoped_statement (parser
, NULL
);
8522 finish_else_clause (statement
);
8524 /* If we are currently parsing a then-clause, then
8525 IF_P will not be NULL. We set it to true to
8526 indicate that this if statement has an else clause.
8527 This may trigger the Wparentheses warning below
8528 when we get back up to the parent if statement. */
8534 /* This if statement does not have an else clause. If
8535 NESTED_IF is true, then the then-clause is an if
8536 statement which does have an else clause. We warn
8537 about the potential ambiguity. */
8539 warning_at (EXPR_LOCATION (statement
), OPT_Wparentheses
,
8540 "suggest explicit braces to avoid ambiguous"
8544 /* Now we're all done with the if-statement. */
8545 finish_if_stmt (statement
);
8549 bool in_switch_statement_p
;
8550 unsigned char in_statement
;
8552 /* Add the condition. */
8553 finish_switch_cond (condition
, statement
);
8555 /* Parse the body of the switch-statement. */
8556 in_switch_statement_p
= parser
->in_switch_statement_p
;
8557 in_statement
= parser
->in_statement
;
8558 parser
->in_switch_statement_p
= true;
8559 parser
->in_statement
|= IN_SWITCH_STMT
;
8560 cp_parser_implicitly_scoped_statement (parser
, NULL
);
8561 parser
->in_switch_statement_p
= in_switch_statement_p
;
8562 parser
->in_statement
= in_statement
;
8564 /* Now we're all done with the switch-statement. */
8565 finish_switch_stmt (statement
);
8573 cp_parser_error (parser
, "expected selection-statement");
8574 return error_mark_node
;
8578 /* Parse a condition.
8582 type-specifier-seq declarator = initializer-clause
8583 type-specifier-seq declarator braced-init-list
8588 type-specifier-seq declarator asm-specification [opt]
8589 attributes [opt] = assignment-expression
8591 Returns the expression that should be tested. */
8594 cp_parser_condition (cp_parser
* parser
)
8596 cp_decl_specifier_seq type_specifiers
;
8597 const char *saved_message
;
8598 int declares_class_or_enum
;
8600 /* Try the declaration first. */
8601 cp_parser_parse_tentatively (parser
);
8602 /* New types are not allowed in the type-specifier-seq for a
8604 saved_message
= parser
->type_definition_forbidden_message
;
8605 parser
->type_definition_forbidden_message
8606 = G_("types may not be defined in conditions");
8607 /* Parse the type-specifier-seq. */
8608 cp_parser_decl_specifier_seq (parser
,
8609 CP_PARSER_FLAGS_ONLY_TYPE_OR_CONSTEXPR
,
8611 &declares_class_or_enum
);
8612 /* Restore the saved message. */
8613 parser
->type_definition_forbidden_message
= saved_message
;
8614 /* If all is well, we might be looking at a declaration. */
8615 if (!cp_parser_error_occurred (parser
))
8618 tree asm_specification
;
8620 cp_declarator
*declarator
;
8621 tree initializer
= NULL_TREE
;
8623 /* Parse the declarator. */
8624 declarator
= cp_parser_declarator (parser
, CP_PARSER_DECLARATOR_NAMED
,
8625 /*ctor_dtor_or_conv_p=*/NULL
,
8626 /*parenthesized_p=*/NULL
,
8627 /*member_p=*/false);
8628 /* Parse the attributes. */
8629 attributes
= cp_parser_attributes_opt (parser
);
8630 /* Parse the asm-specification. */
8631 asm_specification
= cp_parser_asm_specification_opt (parser
);
8632 /* If the next token is not an `=' or '{', then we might still be
8633 looking at an expression. For example:
8637 looks like a decl-specifier-seq and a declarator -- but then
8638 there is no `=', so this is an expression. */
8639 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_EQ
)
8640 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_OPEN_BRACE
))
8641 cp_parser_simulate_error (parser
);
8643 /* If we did see an `=' or '{', then we are looking at a declaration
8645 if (cp_parser_parse_definitely (parser
))
8648 bool non_constant_p
;
8649 bool flags
= LOOKUP_ONLYCONVERTING
;
8651 /* Create the declaration. */
8652 decl
= start_decl (declarator
, &type_specifiers
,
8653 /*initialized_p=*/true,
8654 attributes
, /*prefix_attributes=*/NULL_TREE
,
8657 /* Parse the initializer. */
8658 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
8660 initializer
= cp_parser_braced_list (parser
, &non_constant_p
);
8661 CONSTRUCTOR_IS_DIRECT_INIT (initializer
) = 1;
8666 /* Consume the `='. */
8667 cp_parser_require (parser
, CPP_EQ
, RT_EQ
);
8668 initializer
= cp_parser_initializer_clause (parser
, &non_constant_p
);
8670 if (BRACE_ENCLOSED_INITIALIZER_P (initializer
))
8671 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
8673 if (!non_constant_p
)
8674 initializer
= fold_non_dependent_expr (initializer
);
8676 /* Process the initializer. */
8677 cp_finish_decl (decl
,
8678 initializer
, !non_constant_p
,
8683 pop_scope (pushed_scope
);
8685 return convert_from_reference (decl
);
8688 /* If we didn't even get past the declarator successfully, we are
8689 definitely not looking at a declaration. */
8691 cp_parser_abort_tentative_parse (parser
);
8693 /* Otherwise, we are looking at an expression. */
8694 return cp_parser_expression (parser
, /*cast_p=*/false, NULL
);
8697 /* Parses a traditional for-statement until the closing ')', not included. */
8700 cp_parser_c_for (cp_parser
*parser
)
8702 /* Normal for loop */
8704 tree condition
= NULL_TREE
;
8705 tree expression
= NULL_TREE
;
8707 /* Begin the for-statement. */
8708 stmt
= begin_for_stmt ();
8710 /* Parse the initialization. */
8711 cp_parser_for_init_statement (parser
);
8712 finish_for_init_stmt (stmt
);
8714 /* If there's a condition, process it. */
8715 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
8716 condition
= cp_parser_condition (parser
);
8717 finish_for_cond (condition
, stmt
);
8718 /* Look for the `;'. */
8719 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
8721 /* If there's an expression, process it. */
8722 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_CLOSE_PAREN
))
8723 expression
= cp_parser_expression (parser
, /*cast_p=*/false, NULL
);
8724 finish_for_expr (expression
, stmt
);
8729 /* Tries to parse a range-based for-statement:
8732 type-specifier-seq declarator : expression
8734 If succesful, assigns to *DECL the DECLARATOR and to *EXPR the
8735 expression. Note that the *DECL is returned unfinished, so
8736 later you should call cp_finish_decl().
8738 Returns TRUE iff a range-based for is parsed. */
8741 cp_parser_range_for (cp_parser
*parser
)
8743 tree stmt
, range_decl
, range_expr
;
8744 cp_decl_specifier_seq type_specifiers
;
8745 cp_declarator
*declarator
;
8746 const char *saved_message
;
8747 tree attributes
, pushed_scope
;
8748 bool saved_colon_corrects_to_scope_p
= parser
->colon_corrects_to_scope_p
;
8750 parser
->colon_corrects_to_scope_p
= false;
8751 cp_parser_parse_tentatively (parser
);
8752 /* New types are not allowed in the type-specifier-seq for a
8753 range-based for loop. */
8754 saved_message
= parser
->type_definition_forbidden_message
;
8755 parser
->type_definition_forbidden_message
8756 = G_("types may not be defined in range-based for loops");
8757 /* Parse the type-specifier-seq. */
8758 cp_parser_type_specifier_seq (parser
, /*is_declaration==*/true,
8759 /*is_trailing_return=*/false,
8761 /* Restore the saved message. */
8762 parser
->type_definition_forbidden_message
= saved_message
;
8763 /* If all is well, we might be looking at a declaration. */
8764 if (cp_parser_error_occurred (parser
))
8766 cp_parser_abort_tentative_parse (parser
);
8770 /* Parse the declarator. */
8771 declarator
= cp_parser_declarator (parser
, CP_PARSER_DECLARATOR_NAMED
,
8772 /*ctor_dtor_or_conv_p=*/NULL
,
8773 /*parenthesized_p=*/NULL
,
8774 /*member_p=*/false);
8775 /* Parse the attributes. */
8776 attributes
= cp_parser_attributes_opt (parser
);
8777 /* The next token should be `:'. */
8778 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COLON
))
8779 cp_parser_simulate_error (parser
);
8781 /* Check if it is a range-based for */
8782 if (!cp_parser_parse_definitely (parser
))
8785 cp_parser_require (parser
, CPP_COLON
, RT_COLON
);
8786 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
8788 bool expr_non_constant_p
;
8789 range_expr
= cp_parser_braced_list (parser
, &expr_non_constant_p
);
8792 range_expr
= cp_parser_expression (parser
, /*cast_p=*/false, NULL
);
8794 /* If in template, STMT is converted to a normal for-statements
8795 at instantiation. If not, it is done just ahead. */
8796 if (processing_template_decl
)
8797 stmt
= begin_range_for_stmt ();
8799 stmt
= begin_for_stmt ();
8801 /* Create the declaration. It must be after begin{,_range}_for_stmt(). */
8802 range_decl
= start_decl (declarator
, &type_specifiers
,
8803 /*initialized_p=*/SD_INITIALIZED
,
8804 attributes
, /*prefix_attributes=*/NULL_TREE
,
8806 /* No scope allowed here */
8807 pop_scope (pushed_scope
);
8809 if (TREE_CODE (stmt
) == RANGE_FOR_STMT
)
8810 finish_range_for_decl (stmt
, range_decl
, range_expr
);
8812 /* Convert the range-based for loop into a normal for-statement. */
8813 stmt
= cp_convert_range_for (stmt
, range_decl
, range_expr
);
8816 parser
->colon_corrects_to_scope_p
= saved_colon_corrects_to_scope_p
;
8820 /* Converts a range-based for-statement into a normal
8821 for-statement, as per the definition.
8823 for (RANGE_DECL : RANGE_EXPR)
8826 should be equivalent to:
8829 auto &&__range = RANGE_EXPR;
8830 for (auto __begin = BEGIN_EXPR, end = END_EXPR;
8834 RANGE_DECL = *__begin;
8839 If RANGE_EXPR is an array:
8840 BEGIN_EXPR = __range
8841 END_EXPR = __range + ARRAY_SIZE(__range)
8843 BEGIN_EXPR = begin(__range)
8844 END_EXPR = end(__range);
8846 When calling begin()/end() we must use argument dependent
8847 lookup, but always considering 'std' as an associated namespace. */
8850 cp_convert_range_for (tree statement
, tree range_decl
, tree range_expr
)
8852 tree range_type
, range_temp
;
8854 tree iter_type
, begin_expr
, end_expr
;
8855 tree condition
, expression
;
8857 /* Find out the type deduced by the declaration
8858 * `auto &&__range = range_expr' */
8859 range_type
= cp_build_reference_type (make_auto (), true);
8860 range_type
= do_auto_deduction (range_type
, range_expr
,
8861 type_uses_auto (range_type
));
8863 /* Create the __range variable */
8864 range_temp
= build_decl (input_location
, VAR_DECL
,
8865 get_identifier ("__for_range"), range_type
);
8866 TREE_USED (range_temp
) = 1;
8867 DECL_ARTIFICIAL (range_temp
) = 1;
8868 pushdecl (range_temp
);
8869 cp_finish_decl (range_temp
, range_expr
,
8870 /*is_constant_init*/false, NULL_TREE
,
8871 LOOKUP_ONLYCONVERTING
);
8873 range_temp
= convert_from_reference (range_temp
);
8875 if (TREE_CODE (TREE_TYPE (range_temp
)) == ARRAY_TYPE
)
8877 /* If RANGE_TEMP is an array we will use pointer arithmetic */
8878 iter_type
= build_pointer_type (TREE_TYPE (TREE_TYPE (range_temp
)));
8879 begin_expr
= range_temp
;
8881 = build_binary_op (input_location
, PLUS_EXPR
,
8883 array_type_nelts_top (TREE_TYPE (range_temp
)), 0);
8887 /* If it is not an array, we must call begin(__range)/end__range() */
8890 begin_expr
= get_identifier ("begin");
8891 vec
= make_tree_vector ();
8892 VEC_safe_push (tree
, gc
, vec
, range_temp
);
8893 begin_expr
= perform_koenig_lookup (begin_expr
, vec
,
8894 /*include_std=*/true);
8895 begin_expr
= finish_call_expr (begin_expr
, &vec
, false, true,
8896 tf_warning_or_error
);
8897 release_tree_vector (vec
);
8899 end_expr
= get_identifier ("end");
8900 vec
= make_tree_vector ();
8901 VEC_safe_push (tree
, gc
, vec
, range_temp
);
8902 end_expr
= perform_koenig_lookup (end_expr
, vec
,
8903 /*include_std=*/true);
8904 end_expr
= finish_call_expr (end_expr
, &vec
, false, true,
8905 tf_warning_or_error
);
8906 release_tree_vector (vec
);
8908 /* The unqualified type of the __begin and __end temporaries should
8909 * be the same as required by the multiple auto declaration */
8910 iter_type
= cv_unqualified (TREE_TYPE (begin_expr
));
8911 if (!same_type_p (iter_type
, cv_unqualified (TREE_TYPE (end_expr
))))
8912 error ("inconsistent begin/end types in range-based for: %qT and %qT",
8913 TREE_TYPE (begin_expr
), TREE_TYPE (end_expr
));
8916 /* The new for initialization statement */
8917 begin
= build_decl (input_location
, VAR_DECL
,
8918 get_identifier ("__for_begin"), iter_type
);
8919 TREE_USED (begin
) = 1;
8920 DECL_ARTIFICIAL (begin
) = 1;
8922 cp_finish_decl (begin
, begin_expr
,
8923 /*is_constant_init*/false, NULL_TREE
,
8924 LOOKUP_ONLYCONVERTING
);
8926 end
= build_decl (input_location
, VAR_DECL
,
8927 get_identifier ("__for_end"), iter_type
);
8928 TREE_USED (end
) = 1;
8929 DECL_ARTIFICIAL (end
) = 1;
8931 cp_finish_decl (end
, end_expr
,
8932 /*is_constant_init*/false, NULL_TREE
,
8933 LOOKUP_ONLYCONVERTING
);
8935 finish_for_init_stmt (statement
);
8937 /* The new for condition */
8938 condition
= build_x_binary_op (NE_EXPR
,
8941 NULL
, tf_warning_or_error
);
8942 finish_for_cond (condition
, statement
);
8944 /* The new increment expression */
8945 expression
= finish_unary_op_expr (PREINCREMENT_EXPR
, begin
);
8946 finish_for_expr (expression
, statement
);
8948 /* The declaration is initialized with *__begin inside the loop body */
8949 cp_finish_decl (range_decl
,
8950 build_x_indirect_ref (begin
, RO_NULL
, tf_warning_or_error
),
8951 /*is_constant_init*/false, NULL_TREE
,
8952 LOOKUP_ONLYCONVERTING
);
8958 /* Parse an iteration-statement.
8960 iteration-statement:
8961 while ( condition ) statement
8962 do statement while ( expression ) ;
8963 for ( for-init-statement condition [opt] ; expression [opt] )
8966 Returns the new WHILE_STMT, DO_STMT, FOR_STMT or RANGE_FOR_STMT. */
8969 cp_parser_iteration_statement (cp_parser
* parser
)
8974 unsigned char in_statement
;
8976 /* Peek at the next token. */
8977 token
= cp_parser_require (parser
, CPP_KEYWORD
, RT_INTERATION
);
8979 return error_mark_node
;
8981 /* Remember whether or not we are already within an iteration
8983 in_statement
= parser
->in_statement
;
8985 /* See what kind of keyword it is. */
8986 keyword
= token
->keyword
;
8993 /* Begin the while-statement. */
8994 statement
= begin_while_stmt ();
8995 /* Look for the `('. */
8996 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
8997 /* Parse the condition. */
8998 condition
= cp_parser_condition (parser
);
8999 finish_while_stmt_cond (condition
, statement
);
9000 /* Look for the `)'. */
9001 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
9002 /* Parse the dependent statement. */
9003 parser
->in_statement
= IN_ITERATION_STMT
;
9004 cp_parser_already_scoped_statement (parser
);
9005 parser
->in_statement
= in_statement
;
9006 /* We're done with the while-statement. */
9007 finish_while_stmt (statement
);
9015 /* Begin the do-statement. */
9016 statement
= begin_do_stmt ();
9017 /* Parse the body of the do-statement. */
9018 parser
->in_statement
= IN_ITERATION_STMT
;
9019 cp_parser_implicitly_scoped_statement (parser
, NULL
);
9020 parser
->in_statement
= in_statement
;
9021 finish_do_body (statement
);
9022 /* Look for the `while' keyword. */
9023 cp_parser_require_keyword (parser
, RID_WHILE
, RT_WHILE
);
9024 /* Look for the `('. */
9025 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
9026 /* Parse the expression. */
9027 expression
= cp_parser_expression (parser
, /*cast_p=*/false, NULL
);
9028 /* We're done with the do-statement. */
9029 finish_do_stmt (expression
, statement
);
9030 /* Look for the `)'. */
9031 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
9032 /* Look for the `;'. */
9033 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
9039 /* Look for the `('. */
9040 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
9042 if (cxx_dialect
== cxx0x
)
9043 statement
= cp_parser_range_for (parser
);
9045 statement
= NULL_TREE
;
9046 if (statement
== NULL_TREE
)
9047 statement
= cp_parser_c_for (parser
);
9049 /* Look for the `)'. */
9050 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
9052 /* Parse the body of the for-statement. */
9053 parser
->in_statement
= IN_ITERATION_STMT
;
9054 cp_parser_already_scoped_statement (parser
);
9055 parser
->in_statement
= in_statement
;
9057 /* We're done with the for-statement. */
9058 finish_for_stmt (statement
);
9063 cp_parser_error (parser
, "expected iteration-statement");
9064 statement
= error_mark_node
;
9071 /* Parse a for-init-statement.
9074 expression-statement
9075 simple-declaration */
9078 cp_parser_for_init_statement (cp_parser
* parser
)
9080 /* If the next token is a `;', then we have an empty
9081 expression-statement. Grammatically, this is also a
9082 simple-declaration, but an invalid one, because it does not
9083 declare anything. Therefore, if we did not handle this case
9084 specially, we would issue an error message about an invalid
9086 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
9088 /* We're going to speculatively look for a declaration, falling back
9089 to an expression, if necessary. */
9090 cp_parser_parse_tentatively (parser
);
9091 /* Parse the declaration. */
9092 cp_parser_simple_declaration (parser
,
9093 /*function_definition_allowed_p=*/false);
9094 /* If the tentative parse failed, then we shall need to look for an
9095 expression-statement. */
9096 if (cp_parser_parse_definitely (parser
))
9100 cp_parser_expression_statement (parser
, NULL_TREE
);
9103 /* Parse a jump-statement.
9108 return expression [opt] ;
9109 return braced-init-list ;
9117 Returns the new BREAK_STMT, CONTINUE_STMT, RETURN_EXPR, or GOTO_EXPR. */
9120 cp_parser_jump_statement (cp_parser
* parser
)
9122 tree statement
= error_mark_node
;
9125 unsigned char in_statement
;
9127 /* Peek at the next token. */
9128 token
= cp_parser_require (parser
, CPP_KEYWORD
, RT_JUMP
);
9130 return error_mark_node
;
9132 /* See what kind of keyword it is. */
9133 keyword
= token
->keyword
;
9137 in_statement
= parser
->in_statement
& ~IN_IF_STMT
;
9138 switch (in_statement
)
9141 error_at (token
->location
, "break statement not within loop or switch");
9144 gcc_assert ((in_statement
& IN_SWITCH_STMT
)
9145 || in_statement
== IN_ITERATION_STMT
);
9146 statement
= finish_break_stmt ();
9149 error_at (token
->location
, "invalid exit from OpenMP structured block");
9152 error_at (token
->location
, "break statement used with OpenMP for loop");
9155 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
9159 switch (parser
->in_statement
& ~(IN_SWITCH_STMT
| IN_IF_STMT
))
9162 error_at (token
->location
, "continue statement not within a loop");
9164 case IN_ITERATION_STMT
:
9166 statement
= finish_continue_stmt ();
9169 error_at (token
->location
, "invalid exit from OpenMP structured block");
9174 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
9180 bool expr_non_constant_p
;
9182 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
9184 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
9185 expr
= cp_parser_braced_list (parser
, &expr_non_constant_p
);
9187 else if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
9188 expr
= cp_parser_expression (parser
, /*cast_p=*/false, NULL
);
9190 /* If the next token is a `;', then there is no
9193 /* Build the return-statement. */
9194 statement
= finish_return_stmt (expr
);
9195 /* Look for the final `;'. */
9196 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
9201 /* Create the goto-statement. */
9202 if (cp_lexer_next_token_is (parser
->lexer
, CPP_MULT
))
9204 /* Issue a warning about this use of a GNU extension. */
9205 pedwarn (token
->location
, OPT_pedantic
, "ISO C++ forbids computed gotos");
9206 /* Consume the '*' token. */
9207 cp_lexer_consume_token (parser
->lexer
);
9208 /* Parse the dependent expression. */
9209 finish_goto_stmt (cp_parser_expression (parser
, /*cast_p=*/false, NULL
));
9212 finish_goto_stmt (cp_parser_identifier (parser
));
9213 /* Look for the final `;'. */
9214 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
9218 cp_parser_error (parser
, "expected jump-statement");
9225 /* Parse a declaration-statement.
9227 declaration-statement:
9228 block-declaration */
9231 cp_parser_declaration_statement (cp_parser
* parser
)
9235 /* Get the high-water mark for the DECLARATOR_OBSTACK. */
9236 p
= obstack_alloc (&declarator_obstack
, 0);
9238 /* Parse the block-declaration. */
9239 cp_parser_block_declaration (parser
, /*statement_p=*/true);
9241 /* Free any declarators allocated. */
9242 obstack_free (&declarator_obstack
, p
);
9244 /* Finish off the statement. */
9248 /* Some dependent statements (like `if (cond) statement'), are
9249 implicitly in their own scope. In other words, if the statement is
9250 a single statement (as opposed to a compound-statement), it is
9251 none-the-less treated as if it were enclosed in braces. Any
9252 declarations appearing in the dependent statement are out of scope
9253 after control passes that point. This function parses a statement,
9254 but ensures that is in its own scope, even if it is not a
9257 If IF_P is not NULL, *IF_P is set to indicate whether the statement
9258 is a (possibly labeled) if statement which is not enclosed in
9259 braces and has an else clause. This is used to implement
9262 Returns the new statement. */
9265 cp_parser_implicitly_scoped_statement (cp_parser
* parser
, bool *if_p
)
9272 /* Mark if () ; with a special NOP_EXPR. */
9273 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
9275 location_t loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
9276 cp_lexer_consume_token (parser
->lexer
);
9277 statement
= add_stmt (build_empty_stmt (loc
));
9279 /* if a compound is opened, we simply parse the statement directly. */
9280 else if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
9281 statement
= cp_parser_compound_statement (parser
, NULL
, false);
9282 /* If the token is not a `{', then we must take special action. */
9285 /* Create a compound-statement. */
9286 statement
= begin_compound_stmt (0);
9287 /* Parse the dependent-statement. */
9288 cp_parser_statement (parser
, NULL_TREE
, false, if_p
);
9289 /* Finish the dummy compound-statement. */
9290 finish_compound_stmt (statement
);
9293 /* Return the statement. */
9297 /* For some dependent statements (like `while (cond) statement'), we
9298 have already created a scope. Therefore, even if the dependent
9299 statement is a compound-statement, we do not want to create another
9303 cp_parser_already_scoped_statement (cp_parser
* parser
)
9305 /* If the token is a `{', then we must take special action. */
9306 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_OPEN_BRACE
))
9307 cp_parser_statement (parser
, NULL_TREE
, false, NULL
);
9310 /* Avoid calling cp_parser_compound_statement, so that we
9311 don't create a new scope. Do everything else by hand. */
9312 cp_parser_require (parser
, CPP_OPEN_BRACE
, RT_OPEN_BRACE
);
9313 /* If the next keyword is `__label__' we have a label declaration. */
9314 while (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_LABEL
))
9315 cp_parser_label_declaration (parser
);
9316 /* Parse an (optional) statement-seq. */
9317 cp_parser_statement_seq_opt (parser
, NULL_TREE
);
9318 cp_parser_require (parser
, CPP_CLOSE_BRACE
, RT_CLOSE_BRACE
);
9322 /* Declarations [gram.dcl.dcl] */
9324 /* Parse an optional declaration-sequence.
9328 declaration-seq declaration */
9331 cp_parser_declaration_seq_opt (cp_parser
* parser
)
9337 token
= cp_lexer_peek_token (parser
->lexer
);
9339 if (token
->type
== CPP_CLOSE_BRACE
9340 || token
->type
== CPP_EOF
9341 || token
->type
== CPP_PRAGMA_EOL
)
9344 if (token
->type
== CPP_SEMICOLON
)
9346 /* A declaration consisting of a single semicolon is
9347 invalid. Allow it unless we're being pedantic. */
9348 cp_lexer_consume_token (parser
->lexer
);
9349 if (!in_system_header
)
9350 pedwarn (input_location
, OPT_pedantic
, "extra %<;%>");
9354 /* If we're entering or exiting a region that's implicitly
9355 extern "C", modify the lang context appropriately. */
9356 if (!parser
->implicit_extern_c
&& token
->implicit_extern_c
)
9358 push_lang_context (lang_name_c
);
9359 parser
->implicit_extern_c
= true;
9361 else if (parser
->implicit_extern_c
&& !token
->implicit_extern_c
)
9363 pop_lang_context ();
9364 parser
->implicit_extern_c
= false;
9367 if (token
->type
== CPP_PRAGMA
)
9369 /* A top-level declaration can consist solely of a #pragma.
9370 A nested declaration cannot, so this is done here and not
9371 in cp_parser_declaration. (A #pragma at block scope is
9372 handled in cp_parser_statement.) */
9373 cp_parser_pragma (parser
, pragma_external
);
9377 /* Parse the declaration itself. */
9378 cp_parser_declaration (parser
);
9382 /* Parse a declaration.
9387 template-declaration
9388 explicit-instantiation
9389 explicit-specialization
9390 linkage-specification
9391 namespace-definition
9396 __extension__ declaration */
9399 cp_parser_declaration (cp_parser
* parser
)
9405 tree attributes
= NULL_TREE
;
9407 /* Check for the `__extension__' keyword. */
9408 if (cp_parser_extension_opt (parser
, &saved_pedantic
))
9410 /* Parse the qualified declaration. */
9411 cp_parser_declaration (parser
);
9412 /* Restore the PEDANTIC flag. */
9413 pedantic
= saved_pedantic
;
9418 /* Try to figure out what kind of declaration is present. */
9419 token1
= *cp_lexer_peek_token (parser
->lexer
);
9421 if (token1
.type
!= CPP_EOF
)
9422 token2
= *cp_lexer_peek_nth_token (parser
->lexer
, 2);
9425 token2
.type
= CPP_EOF
;
9426 token2
.keyword
= RID_MAX
;
9429 /* Get the high-water mark for the DECLARATOR_OBSTACK. */
9430 p
= obstack_alloc (&declarator_obstack
, 0);
9432 /* If the next token is `extern' and the following token is a string
9433 literal, then we have a linkage specification. */
9434 if (token1
.keyword
== RID_EXTERN
9435 && cp_parser_is_string_literal (&token2
))
9436 cp_parser_linkage_specification (parser
);
9437 /* If the next token is `template', then we have either a template
9438 declaration, an explicit instantiation, or an explicit
9440 else if (token1
.keyword
== RID_TEMPLATE
)
9442 /* `template <>' indicates a template specialization. */
9443 if (token2
.type
== CPP_LESS
9444 && cp_lexer_peek_nth_token (parser
->lexer
, 3)->type
== CPP_GREATER
)
9445 cp_parser_explicit_specialization (parser
);
9446 /* `template <' indicates a template declaration. */
9447 else if (token2
.type
== CPP_LESS
)
9448 cp_parser_template_declaration (parser
, /*member_p=*/false);
9449 /* Anything else must be an explicit instantiation. */
9451 cp_parser_explicit_instantiation (parser
);
9453 /* If the next token is `export', then we have a template
9455 else if (token1
.keyword
== RID_EXPORT
)
9456 cp_parser_template_declaration (parser
, /*member_p=*/false);
9457 /* If the next token is `extern', 'static' or 'inline' and the one
9458 after that is `template', we have a GNU extended explicit
9459 instantiation directive. */
9460 else if (cp_parser_allow_gnu_extensions_p (parser
)
9461 && (token1
.keyword
== RID_EXTERN
9462 || token1
.keyword
== RID_STATIC
9463 || token1
.keyword
== RID_INLINE
)
9464 && token2
.keyword
== RID_TEMPLATE
)
9465 cp_parser_explicit_instantiation (parser
);
9466 /* If the next token is `namespace', check for a named or unnamed
9467 namespace definition. */
9468 else if (token1
.keyword
== RID_NAMESPACE
9469 && (/* A named namespace definition. */
9470 (token2
.type
== CPP_NAME
9471 && (cp_lexer_peek_nth_token (parser
->lexer
, 3)->type
9473 /* An unnamed namespace definition. */
9474 || token2
.type
== CPP_OPEN_BRACE
9475 || token2
.keyword
== RID_ATTRIBUTE
))
9476 cp_parser_namespace_definition (parser
);
9477 /* An inline (associated) namespace definition. */
9478 else if (token1
.keyword
== RID_INLINE
9479 && token2
.keyword
== RID_NAMESPACE
)
9480 cp_parser_namespace_definition (parser
);
9481 /* Objective-C++ declaration/definition. */
9482 else if (c_dialect_objc () && OBJC_IS_AT_KEYWORD (token1
.keyword
))
9483 cp_parser_objc_declaration (parser
, NULL_TREE
);
9484 else if (c_dialect_objc ()
9485 && token1
.keyword
== RID_ATTRIBUTE
9486 && cp_parser_objc_valid_prefix_attributes (parser
, &attributes
))
9487 cp_parser_objc_declaration (parser
, attributes
);
9488 /* We must have either a block declaration or a function
9491 /* Try to parse a block-declaration, or a function-definition. */
9492 cp_parser_block_declaration (parser
, /*statement_p=*/false);
9494 /* Free any declarators allocated. */
9495 obstack_free (&declarator_obstack
, p
);
9498 /* Parse a block-declaration.
9503 namespace-alias-definition
9510 __extension__ block-declaration
9515 static_assert-declaration
9517 If STATEMENT_P is TRUE, then this block-declaration is occurring as
9518 part of a declaration-statement. */
9521 cp_parser_block_declaration (cp_parser
*parser
,
9527 /* Check for the `__extension__' keyword. */
9528 if (cp_parser_extension_opt (parser
, &saved_pedantic
))
9530 /* Parse the qualified declaration. */
9531 cp_parser_block_declaration (parser
, statement_p
);
9532 /* Restore the PEDANTIC flag. */
9533 pedantic
= saved_pedantic
;
9538 /* Peek at the next token to figure out which kind of declaration is
9540 token1
= cp_lexer_peek_token (parser
->lexer
);
9542 /* If the next keyword is `asm', we have an asm-definition. */
9543 if (token1
->keyword
== RID_ASM
)
9546 cp_parser_commit_to_tentative_parse (parser
);
9547 cp_parser_asm_definition (parser
);
9549 /* If the next keyword is `namespace', we have a
9550 namespace-alias-definition. */
9551 else if (token1
->keyword
== RID_NAMESPACE
)
9552 cp_parser_namespace_alias_definition (parser
);
9553 /* If the next keyword is `using', we have either a
9554 using-declaration or a using-directive. */
9555 else if (token1
->keyword
== RID_USING
)
9560 cp_parser_commit_to_tentative_parse (parser
);
9561 /* If the token after `using' is `namespace', then we have a
9563 token2
= cp_lexer_peek_nth_token (parser
->lexer
, 2);
9564 if (token2
->keyword
== RID_NAMESPACE
)
9565 cp_parser_using_directive (parser
);
9566 /* Otherwise, it's a using-declaration. */
9568 cp_parser_using_declaration (parser
,
9569 /*access_declaration_p=*/false);
9571 /* If the next keyword is `__label__' we have a misplaced label
9573 else if (token1
->keyword
== RID_LABEL
)
9575 cp_lexer_consume_token (parser
->lexer
);
9576 error_at (token1
->location
, "%<__label__%> not at the beginning of a block");
9577 cp_parser_skip_to_end_of_statement (parser
);
9578 /* If the next token is now a `;', consume it. */
9579 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
9580 cp_lexer_consume_token (parser
->lexer
);
9582 /* If the next token is `static_assert' we have a static assertion. */
9583 else if (token1
->keyword
== RID_STATIC_ASSERT
)
9584 cp_parser_static_assert (parser
, /*member_p=*/false);
9585 /* Anything else must be a simple-declaration. */
9587 cp_parser_simple_declaration (parser
, !statement_p
);
9590 /* Parse a simple-declaration.
9593 decl-specifier-seq [opt] init-declarator-list [opt] ;
9595 init-declarator-list:
9597 init-declarator-list , init-declarator
9599 If FUNCTION_DEFINITION_ALLOWED_P is TRUE, then we also recognize a
9600 function-definition as a simple-declaration. */
9603 cp_parser_simple_declaration (cp_parser
* parser
,
9604 bool function_definition_allowed_p
)
9606 cp_decl_specifier_seq decl_specifiers
;
9607 int declares_class_or_enum
;
9608 bool saw_declarator
;
9610 /* Defer access checks until we know what is being declared; the
9611 checks for names appearing in the decl-specifier-seq should be
9612 done as if we were in the scope of the thing being declared. */
9613 push_deferring_access_checks (dk_deferred
);
9615 /* Parse the decl-specifier-seq. We have to keep track of whether
9616 or not the decl-specifier-seq declares a named class or
9617 enumeration type, since that is the only case in which the
9618 init-declarator-list is allowed to be empty.
9622 In a simple-declaration, the optional init-declarator-list can be
9623 omitted only when declaring a class or enumeration, that is when
9624 the decl-specifier-seq contains either a class-specifier, an
9625 elaborated-type-specifier, or an enum-specifier. */
9626 cp_parser_decl_specifier_seq (parser
,
9627 CP_PARSER_FLAGS_OPTIONAL
,
9629 &declares_class_or_enum
);
9630 /* We no longer need to defer access checks. */
9631 stop_deferring_access_checks ();
9633 /* In a block scope, a valid declaration must always have a
9634 decl-specifier-seq. By not trying to parse declarators, we can
9635 resolve the declaration/expression ambiguity more quickly. */
9636 if (!function_definition_allowed_p
9637 && !decl_specifiers
.any_specifiers_p
)
9639 cp_parser_error (parser
, "expected declaration");
9643 /* If the next two tokens are both identifiers, the code is
9644 erroneous. The usual cause of this situation is code like:
9648 where "T" should name a type -- but does not. */
9649 if (!decl_specifiers
.any_type_specifiers_p
9650 && cp_parser_parse_and_diagnose_invalid_type_name (parser
))
9652 /* If parsing tentatively, we should commit; we really are
9653 looking at a declaration. */
9654 cp_parser_commit_to_tentative_parse (parser
);
9659 /* If we have seen at least one decl-specifier, and the next token
9660 is not a parenthesis, then we must be looking at a declaration.
9661 (After "int (" we might be looking at a functional cast.) */
9662 if (decl_specifiers
.any_specifiers_p
9663 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_OPEN_PAREN
)
9664 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_OPEN_BRACE
)
9665 && !cp_parser_error_occurred (parser
))
9666 cp_parser_commit_to_tentative_parse (parser
);
9668 /* Keep going until we hit the `;' at the end of the simple
9670 saw_declarator
= false;
9671 while (cp_lexer_next_token_is_not (parser
->lexer
,
9675 bool function_definition_p
;
9680 /* If we are processing next declarator, coma is expected */
9681 token
= cp_lexer_peek_token (parser
->lexer
);
9682 gcc_assert (token
->type
== CPP_COMMA
);
9683 cp_lexer_consume_token (parser
->lexer
);
9686 saw_declarator
= true;
9688 /* Parse the init-declarator. */
9689 decl
= cp_parser_init_declarator (parser
, &decl_specifiers
,
9691 function_definition_allowed_p
,
9693 declares_class_or_enum
,
9694 &function_definition_p
);
9695 /* If an error occurred while parsing tentatively, exit quickly.
9696 (That usually happens when in the body of a function; each
9697 statement is treated as a declaration-statement until proven
9699 if (cp_parser_error_occurred (parser
))
9701 /* Handle function definitions specially. */
9702 if (function_definition_p
)
9704 /* If the next token is a `,', then we are probably
9705 processing something like:
9709 which is erroneous. */
9710 if (cp_lexer_next_token_is (parser
->lexer
, CPP_COMMA
))
9712 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
9713 error_at (token
->location
,
9715 " declarations and function-definitions is forbidden");
9717 /* Otherwise, we're done with the list of declarators. */
9720 pop_deferring_access_checks ();
9724 /* The next token should be either a `,' or a `;'. */
9725 token
= cp_lexer_peek_token (parser
->lexer
);
9726 /* If it's a `,', there are more declarators to come. */
9727 if (token
->type
== CPP_COMMA
)
9728 /* will be consumed next time around */;
9729 /* If it's a `;', we are done. */
9730 else if (token
->type
== CPP_SEMICOLON
)
9732 /* Anything else is an error. */
9735 /* If we have already issued an error message we don't need
9736 to issue another one. */
9737 if (decl
!= error_mark_node
9738 || cp_parser_uncommitted_to_tentative_parse_p (parser
))
9739 cp_parser_error (parser
, "expected %<,%> or %<;%>");
9740 /* Skip tokens until we reach the end of the statement. */
9741 cp_parser_skip_to_end_of_statement (parser
);
9742 /* If the next token is now a `;', consume it. */
9743 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
9744 cp_lexer_consume_token (parser
->lexer
);
9747 /* After the first time around, a function-definition is not
9748 allowed -- even if it was OK at first. For example:
9753 function_definition_allowed_p
= false;
9756 /* Issue an error message if no declarators are present, and the
9757 decl-specifier-seq does not itself declare a class or
9759 if (!saw_declarator
)
9761 if (cp_parser_declares_only_class_p (parser
))
9762 shadow_tag (&decl_specifiers
);
9763 /* Perform any deferred access checks. */
9764 perform_deferred_access_checks ();
9767 /* Consume the `;'. */
9768 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
9771 pop_deferring_access_checks ();
9774 /* Parse a decl-specifier-seq.
9777 decl-specifier-seq [opt] decl-specifier
9780 storage-class-specifier
9791 Set *DECL_SPECS to a representation of the decl-specifier-seq.
9793 The parser flags FLAGS is used to control type-specifier parsing.
9795 *DECLARES_CLASS_OR_ENUM is set to the bitwise or of the following
9798 1: one of the decl-specifiers is an elaborated-type-specifier
9799 (i.e., a type declaration)
9800 2: one of the decl-specifiers is an enum-specifier or a
9801 class-specifier (i.e., a type definition)
9806 cp_parser_decl_specifier_seq (cp_parser
* parser
,
9807 cp_parser_flags flags
,
9808 cp_decl_specifier_seq
*decl_specs
,
9809 int* declares_class_or_enum
)
9811 bool constructor_possible_p
= !parser
->in_declarator_p
;
9812 cp_token
*start_token
= NULL
;
9814 /* Clear DECL_SPECS. */
9815 clear_decl_specs (decl_specs
);
9817 /* Assume no class or enumeration type is declared. */
9818 *declares_class_or_enum
= 0;
9820 /* Keep reading specifiers until there are no more to read. */
9824 bool found_decl_spec
;
9827 /* Peek at the next token. */
9828 token
= cp_lexer_peek_token (parser
->lexer
);
9830 /* Save the first token of the decl spec list for error
9833 start_token
= token
;
9834 /* Handle attributes. */
9835 if (token
->keyword
== RID_ATTRIBUTE
)
9837 /* Parse the attributes. */
9838 decl_specs
->attributes
9839 = chainon (decl_specs
->attributes
,
9840 cp_parser_attributes_opt (parser
));
9843 /* Assume we will find a decl-specifier keyword. */
9844 found_decl_spec
= true;
9845 /* If the next token is an appropriate keyword, we can simply
9846 add it to the list. */
9847 switch (token
->keyword
)
9853 if (!at_class_scope_p ())
9855 error_at (token
->location
, "%<friend%> used outside of class");
9856 cp_lexer_purge_token (parser
->lexer
);
9860 ++decl_specs
->specs
[(int) ds_friend
];
9861 /* Consume the token. */
9862 cp_lexer_consume_token (parser
->lexer
);
9867 ++decl_specs
->specs
[(int) ds_constexpr
];
9868 cp_lexer_consume_token (parser
->lexer
);
9871 /* function-specifier:
9878 cp_parser_function_specifier_opt (parser
, decl_specs
);
9884 ++decl_specs
->specs
[(int) ds_typedef
];
9885 /* Consume the token. */
9886 cp_lexer_consume_token (parser
->lexer
);
9887 /* A constructor declarator cannot appear in a typedef. */
9888 constructor_possible_p
= false;
9889 /* The "typedef" keyword can only occur in a declaration; we
9890 may as well commit at this point. */
9891 cp_parser_commit_to_tentative_parse (parser
);
9893 if (decl_specs
->storage_class
!= sc_none
)
9894 decl_specs
->conflicting_specifiers_p
= true;
9897 /* storage-class-specifier:
9907 if (cxx_dialect
== cxx98
)
9909 /* Consume the token. */
9910 cp_lexer_consume_token (parser
->lexer
);
9912 /* Complain about `auto' as a storage specifier, if
9913 we're complaining about C++0x compatibility. */
9914 warning_at (token
->location
, OPT_Wc__0x_compat
, "%<auto%>"
9915 " will change meaning in C++0x; please remove it");
9917 /* Set the storage class anyway. */
9918 cp_parser_set_storage_class (parser
, decl_specs
, RID_AUTO
,
9922 /* C++0x auto type-specifier. */
9923 found_decl_spec
= false;
9930 /* Consume the token. */
9931 cp_lexer_consume_token (parser
->lexer
);
9932 cp_parser_set_storage_class (parser
, decl_specs
, token
->keyword
,
9936 /* Consume the token. */
9937 cp_lexer_consume_token (parser
->lexer
);
9938 ++decl_specs
->specs
[(int) ds_thread
];
9942 /* We did not yet find a decl-specifier yet. */
9943 found_decl_spec
= false;
9948 && (flags
& CP_PARSER_FLAGS_ONLY_TYPE_OR_CONSTEXPR
)
9949 && token
->keyword
!= RID_CONSTEXPR
)
9950 error ("decl-specifier invalid in condition");
9952 /* Constructors are a special case. The `S' in `S()' is not a
9953 decl-specifier; it is the beginning of the declarator. */
9956 && constructor_possible_p
9957 && (cp_parser_constructor_declarator_p
9958 (parser
, decl_specs
->specs
[(int) ds_friend
] != 0)));
9960 /* If we don't have a DECL_SPEC yet, then we must be looking at
9961 a type-specifier. */
9962 if (!found_decl_spec
&& !constructor_p
)
9964 int decl_spec_declares_class_or_enum
;
9965 bool is_cv_qualifier
;
9969 = cp_parser_type_specifier (parser
, flags
,
9971 /*is_declaration=*/true,
9972 &decl_spec_declares_class_or_enum
,
9974 *declares_class_or_enum
|= decl_spec_declares_class_or_enum
;
9976 /* If this type-specifier referenced a user-defined type
9977 (a typedef, class-name, etc.), then we can't allow any
9978 more such type-specifiers henceforth.
9982 The longest sequence of decl-specifiers that could
9983 possibly be a type name is taken as the
9984 decl-specifier-seq of a declaration. The sequence shall
9985 be self-consistent as described below.
9989 As a general rule, at most one type-specifier is allowed
9990 in the complete decl-specifier-seq of a declaration. The
9991 only exceptions are the following:
9993 -- const or volatile can be combined with any other
9996 -- signed or unsigned can be combined with char, long,
10004 void g (const int Pc);
10006 Here, Pc is *not* part of the decl-specifier seq; it's
10007 the declarator. Therefore, once we see a type-specifier
10008 (other than a cv-qualifier), we forbid any additional
10009 user-defined types. We *do* still allow things like `int
10010 int' to be considered a decl-specifier-seq, and issue the
10011 error message later. */
10012 if (type_spec
&& !is_cv_qualifier
)
10013 flags
|= CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES
;
10014 /* A constructor declarator cannot follow a type-specifier. */
10017 constructor_possible_p
= false;
10018 found_decl_spec
= true;
10019 if (!is_cv_qualifier
)
10020 decl_specs
->any_type_specifiers_p
= true;
10024 /* If we still do not have a DECL_SPEC, then there are no more
10025 decl-specifiers. */
10026 if (!found_decl_spec
)
10029 decl_specs
->any_specifiers_p
= true;
10030 /* After we see one decl-specifier, further decl-specifiers are
10031 always optional. */
10032 flags
|= CP_PARSER_FLAGS_OPTIONAL
;
10035 cp_parser_check_decl_spec (decl_specs
, start_token
->location
);
10037 /* Don't allow a friend specifier with a class definition. */
10038 if (decl_specs
->specs
[(int) ds_friend
] != 0
10039 && (*declares_class_or_enum
& 2))
10040 error_at (start_token
->location
,
10041 "class definition may not be declared a friend");
10044 /* Parse an (optional) storage-class-specifier.
10046 storage-class-specifier:
10055 storage-class-specifier:
10058 Returns an IDENTIFIER_NODE corresponding to the keyword used. */
10061 cp_parser_storage_class_specifier_opt (cp_parser
* parser
)
10063 switch (cp_lexer_peek_token (parser
->lexer
)->keyword
)
10066 if (cxx_dialect
!= cxx98
)
10068 /* Fall through for C++98. */
10075 /* Consume the token. */
10076 return cp_lexer_consume_token (parser
->lexer
)->u
.value
;
10083 /* Parse an (optional) function-specifier.
10085 function-specifier:
10090 Returns an IDENTIFIER_NODE corresponding to the keyword used.
10091 Updates DECL_SPECS, if it is non-NULL. */
10094 cp_parser_function_specifier_opt (cp_parser
* parser
,
10095 cp_decl_specifier_seq
*decl_specs
)
10097 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
10098 switch (token
->keyword
)
10102 ++decl_specs
->specs
[(int) ds_inline
];
10106 /* 14.5.2.3 [temp.mem]
10108 A member function template shall not be virtual. */
10109 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
10110 error_at (token
->location
, "templates may not be %<virtual%>");
10111 else if (decl_specs
)
10112 ++decl_specs
->specs
[(int) ds_virtual
];
10117 ++decl_specs
->specs
[(int) ds_explicit
];
10124 /* Consume the token. */
10125 return cp_lexer_consume_token (parser
->lexer
)->u
.value
;
10128 /* Parse a linkage-specification.
10130 linkage-specification:
10131 extern string-literal { declaration-seq [opt] }
10132 extern string-literal declaration */
10135 cp_parser_linkage_specification (cp_parser
* parser
)
10139 /* Look for the `extern' keyword. */
10140 cp_parser_require_keyword (parser
, RID_EXTERN
, RT_EXTERN
);
10142 /* Look for the string-literal. */
10143 linkage
= cp_parser_string_literal (parser
, false, false);
10145 /* Transform the literal into an identifier. If the literal is a
10146 wide-character string, or contains embedded NULs, then we can't
10147 handle it as the user wants. */
10148 if (strlen (TREE_STRING_POINTER (linkage
))
10149 != (size_t) (TREE_STRING_LENGTH (linkage
) - 1))
10151 cp_parser_error (parser
, "invalid linkage-specification");
10152 /* Assume C++ linkage. */
10153 linkage
= lang_name_cplusplus
;
10156 linkage
= get_identifier (TREE_STRING_POINTER (linkage
));
10158 /* We're now using the new linkage. */
10159 push_lang_context (linkage
);
10161 /* If the next token is a `{', then we're using the first
10163 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
10165 /* Consume the `{' token. */
10166 cp_lexer_consume_token (parser
->lexer
);
10167 /* Parse the declarations. */
10168 cp_parser_declaration_seq_opt (parser
);
10169 /* Look for the closing `}'. */
10170 cp_parser_require (parser
, CPP_CLOSE_BRACE
, RT_CLOSE_BRACE
);
10172 /* Otherwise, there's just one declaration. */
10175 bool saved_in_unbraced_linkage_specification_p
;
10177 saved_in_unbraced_linkage_specification_p
10178 = parser
->in_unbraced_linkage_specification_p
;
10179 parser
->in_unbraced_linkage_specification_p
= true;
10180 cp_parser_declaration (parser
);
10181 parser
->in_unbraced_linkage_specification_p
10182 = saved_in_unbraced_linkage_specification_p
;
10185 /* We're done with the linkage-specification. */
10186 pop_lang_context ();
10189 /* Parse a static_assert-declaration.
10191 static_assert-declaration:
10192 static_assert ( constant-expression , string-literal ) ;
10194 If MEMBER_P, this static_assert is a class member. */
10197 cp_parser_static_assert(cp_parser
*parser
, bool member_p
)
10202 location_t saved_loc
;
10204 /* Peek at the `static_assert' token so we can keep track of exactly
10205 where the static assertion started. */
10206 token
= cp_lexer_peek_token (parser
->lexer
);
10207 saved_loc
= token
->location
;
10209 /* Look for the `static_assert' keyword. */
10210 if (!cp_parser_require_keyword (parser
, RID_STATIC_ASSERT
,
10214 /* We know we are in a static assertion; commit to any tentative
10216 if (cp_parser_parsing_tentatively (parser
))
10217 cp_parser_commit_to_tentative_parse (parser
);
10219 /* Parse the `(' starting the static assertion condition. */
10220 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
10222 /* Parse the constant-expression. */
10224 cp_parser_constant_expression (parser
,
10225 /*allow_non_constant_p=*/false,
10226 /*non_constant_p=*/NULL
);
10228 /* Parse the separating `,'. */
10229 cp_parser_require (parser
, CPP_COMMA
, RT_COMMA
);
10231 /* Parse the string-literal message. */
10232 message
= cp_parser_string_literal (parser
,
10233 /*translate=*/false,
10236 /* A `)' completes the static assertion. */
10237 if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
10238 cp_parser_skip_to_closing_parenthesis (parser
,
10239 /*recovering=*/true,
10240 /*or_comma=*/false,
10241 /*consume_paren=*/true);
10243 /* A semicolon terminates the declaration. */
10244 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
10246 /* Complete the static assertion, which may mean either processing
10247 the static assert now or saving it for template instantiation. */
10248 finish_static_assert (condition
, message
, saved_loc
, member_p
);
10251 /* Parse a `decltype' type. Returns the type.
10253 simple-type-specifier:
10254 decltype ( expression ) */
10257 cp_parser_decltype (cp_parser
*parser
)
10260 bool id_expression_or_member_access_p
= false;
10261 const char *saved_message
;
10262 bool saved_integral_constant_expression_p
;
10263 bool saved_non_integral_constant_expression_p
;
10264 cp_token
*id_expr_start_token
;
10266 /* Look for the `decltype' token. */
10267 if (!cp_parser_require_keyword (parser
, RID_DECLTYPE
, RT_DECLTYPE
))
10268 return error_mark_node
;
10270 /* Types cannot be defined in a `decltype' expression. Save away the
10272 saved_message
= parser
->type_definition_forbidden_message
;
10274 /* And create the new one. */
10275 parser
->type_definition_forbidden_message
10276 = G_("types may not be defined in %<decltype%> expressions");
10278 /* The restrictions on constant-expressions do not apply inside
10279 decltype expressions. */
10280 saved_integral_constant_expression_p
10281 = parser
->integral_constant_expression_p
;
10282 saved_non_integral_constant_expression_p
10283 = parser
->non_integral_constant_expression_p
;
10284 parser
->integral_constant_expression_p
= false;
10286 /* Do not actually evaluate the expression. */
10287 ++cp_unevaluated_operand
;
10289 /* Do not warn about problems with the expression. */
10290 ++c_inhibit_evaluation_warnings
;
10292 /* Parse the opening `('. */
10293 if (!cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
10294 return error_mark_node
;
10296 /* First, try parsing an id-expression. */
10297 id_expr_start_token
= cp_lexer_peek_token (parser
->lexer
);
10298 cp_parser_parse_tentatively (parser
);
10299 expr
= cp_parser_id_expression (parser
,
10300 /*template_keyword_p=*/false,
10301 /*check_dependency_p=*/true,
10302 /*template_p=*/NULL
,
10303 /*declarator_p=*/false,
10304 /*optional_p=*/false);
10306 if (!cp_parser_error_occurred (parser
) && expr
!= error_mark_node
)
10308 bool non_integral_constant_expression_p
= false;
10309 tree id_expression
= expr
;
10311 const char *error_msg
;
10313 if (TREE_CODE (expr
) == IDENTIFIER_NODE
)
10314 /* Lookup the name we got back from the id-expression. */
10315 expr
= cp_parser_lookup_name (parser
, expr
,
10317 /*is_template=*/false,
10318 /*is_namespace=*/false,
10319 /*check_dependency=*/true,
10320 /*ambiguous_decls=*/NULL
,
10321 id_expr_start_token
->location
);
10324 && expr
!= error_mark_node
10325 && TREE_CODE (expr
) != TEMPLATE_ID_EXPR
10326 && TREE_CODE (expr
) != TYPE_DECL
10327 && (TREE_CODE (expr
) != BIT_NOT_EXPR
10328 || !TYPE_P (TREE_OPERAND (expr
, 0)))
10329 && cp_lexer_peek_token (parser
->lexer
)->type
== CPP_CLOSE_PAREN
)
10331 /* Complete lookup of the id-expression. */
10332 expr
= (finish_id_expression
10333 (id_expression
, expr
, parser
->scope
, &idk
,
10334 /*integral_constant_expression_p=*/false,
10335 /*allow_non_integral_constant_expression_p=*/true,
10336 &non_integral_constant_expression_p
,
10337 /*template_p=*/false,
10339 /*address_p=*/false,
10340 /*template_arg_p=*/false,
10342 id_expr_start_token
->location
));
10344 if (expr
== error_mark_node
)
10345 /* We found an id-expression, but it was something that we
10346 should not have found. This is an error, not something
10347 we can recover from, so note that we found an
10348 id-expression and we'll recover as gracefully as
10350 id_expression_or_member_access_p
= true;
10354 && expr
!= error_mark_node
10355 && cp_lexer_peek_token (parser
->lexer
)->type
== CPP_CLOSE_PAREN
)
10356 /* We have an id-expression. */
10357 id_expression_or_member_access_p
= true;
10360 if (!id_expression_or_member_access_p
)
10362 /* Abort the id-expression parse. */
10363 cp_parser_abort_tentative_parse (parser
);
10365 /* Parsing tentatively, again. */
10366 cp_parser_parse_tentatively (parser
);
10368 /* Parse a class member access. */
10369 expr
= cp_parser_postfix_expression (parser
, /*address_p=*/false,
10371 /*member_access_only_p=*/true, NULL
);
10374 && expr
!= error_mark_node
10375 && cp_lexer_peek_token (parser
->lexer
)->type
== CPP_CLOSE_PAREN
)
10376 /* We have an id-expression. */
10377 id_expression_or_member_access_p
= true;
10380 if (id_expression_or_member_access_p
)
10381 /* We have parsed the complete id-expression or member access. */
10382 cp_parser_parse_definitely (parser
);
10385 bool saved_greater_than_is_operator_p
;
10387 /* Abort our attempt to parse an id-expression or member access
10389 cp_parser_abort_tentative_parse (parser
);
10391 /* Within a parenthesized expression, a `>' token is always
10392 the greater-than operator. */
10393 saved_greater_than_is_operator_p
10394 = parser
->greater_than_is_operator_p
;
10395 parser
->greater_than_is_operator_p
= true;
10397 /* Parse a full expression. */
10398 expr
= cp_parser_expression (parser
, /*cast_p=*/false, NULL
);
10400 /* The `>' token might be the end of a template-id or
10401 template-parameter-list now. */
10402 parser
->greater_than_is_operator_p
10403 = saved_greater_than_is_operator_p
;
10406 /* Go back to evaluating expressions. */
10407 --cp_unevaluated_operand
;
10408 --c_inhibit_evaluation_warnings
;
10410 /* Restore the old message and the integral constant expression
10412 parser
->type_definition_forbidden_message
= saved_message
;
10413 parser
->integral_constant_expression_p
10414 = saved_integral_constant_expression_p
;
10415 parser
->non_integral_constant_expression_p
10416 = saved_non_integral_constant_expression_p
;
10418 if (expr
== error_mark_node
)
10420 /* Skip everything up to the closing `)'. */
10421 cp_parser_skip_to_closing_parenthesis (parser
, true, false,
10422 /*consume_paren=*/true);
10423 return error_mark_node
;
10426 /* Parse to the closing `)'. */
10427 if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
10429 cp_parser_skip_to_closing_parenthesis (parser
, true, false,
10430 /*consume_paren=*/true);
10431 return error_mark_node
;
10434 return finish_decltype_type (expr
, id_expression_or_member_access_p
);
10437 /* Special member functions [gram.special] */
10439 /* Parse a conversion-function-id.
10441 conversion-function-id:
10442 operator conversion-type-id
10444 Returns an IDENTIFIER_NODE representing the operator. */
10447 cp_parser_conversion_function_id (cp_parser
* parser
)
10451 tree saved_qualifying_scope
;
10452 tree saved_object_scope
;
10453 tree pushed_scope
= NULL_TREE
;
10455 /* Look for the `operator' token. */
10456 if (!cp_parser_require_keyword (parser
, RID_OPERATOR
, RT_OPERATOR
))
10457 return error_mark_node
;
10458 /* When we parse the conversion-type-id, the current scope will be
10459 reset. However, we need that information in able to look up the
10460 conversion function later, so we save it here. */
10461 saved_scope
= parser
->scope
;
10462 saved_qualifying_scope
= parser
->qualifying_scope
;
10463 saved_object_scope
= parser
->object_scope
;
10464 /* We must enter the scope of the class so that the names of
10465 entities declared within the class are available in the
10466 conversion-type-id. For example, consider:
10473 S::operator I() { ... }
10475 In order to see that `I' is a type-name in the definition, we
10476 must be in the scope of `S'. */
10478 pushed_scope
= push_scope (saved_scope
);
10479 /* Parse the conversion-type-id. */
10480 type
= cp_parser_conversion_type_id (parser
);
10481 /* Leave the scope of the class, if any. */
10483 pop_scope (pushed_scope
);
10484 /* Restore the saved scope. */
10485 parser
->scope
= saved_scope
;
10486 parser
->qualifying_scope
= saved_qualifying_scope
;
10487 parser
->object_scope
= saved_object_scope
;
10488 /* If the TYPE is invalid, indicate failure. */
10489 if (type
== error_mark_node
)
10490 return error_mark_node
;
10491 return mangle_conv_op_name_for_type (type
);
10494 /* Parse a conversion-type-id:
10496 conversion-type-id:
10497 type-specifier-seq conversion-declarator [opt]
10499 Returns the TYPE specified. */
10502 cp_parser_conversion_type_id (cp_parser
* parser
)
10505 cp_decl_specifier_seq type_specifiers
;
10506 cp_declarator
*declarator
;
10507 tree type_specified
;
10509 /* Parse the attributes. */
10510 attributes
= cp_parser_attributes_opt (parser
);
10511 /* Parse the type-specifiers. */
10512 cp_parser_type_specifier_seq (parser
, /*is_declaration=*/false,
10513 /*is_trailing_return=*/false,
10515 /* If that didn't work, stop. */
10516 if (type_specifiers
.type
== error_mark_node
)
10517 return error_mark_node
;
10518 /* Parse the conversion-declarator. */
10519 declarator
= cp_parser_conversion_declarator_opt (parser
);
10521 type_specified
= grokdeclarator (declarator
, &type_specifiers
, TYPENAME
,
10522 /*initialized=*/0, &attributes
);
10524 cplus_decl_attributes (&type_specified
, attributes
, /*flags=*/0);
10526 /* Don't give this error when parsing tentatively. This happens to
10527 work because we always parse this definitively once. */
10528 if (! cp_parser_uncommitted_to_tentative_parse_p (parser
)
10529 && type_uses_auto (type_specified
))
10531 error ("invalid use of %<auto%> in conversion operator");
10532 return error_mark_node
;
10535 return type_specified
;
10538 /* Parse an (optional) conversion-declarator.
10540 conversion-declarator:
10541 ptr-operator conversion-declarator [opt]
10545 static cp_declarator
*
10546 cp_parser_conversion_declarator_opt (cp_parser
* parser
)
10548 enum tree_code code
;
10550 cp_cv_quals cv_quals
;
10552 /* We don't know if there's a ptr-operator next, or not. */
10553 cp_parser_parse_tentatively (parser
);
10554 /* Try the ptr-operator. */
10555 code
= cp_parser_ptr_operator (parser
, &class_type
, &cv_quals
);
10556 /* If it worked, look for more conversion-declarators. */
10557 if (cp_parser_parse_definitely (parser
))
10559 cp_declarator
*declarator
;
10561 /* Parse another optional declarator. */
10562 declarator
= cp_parser_conversion_declarator_opt (parser
);
10564 return cp_parser_make_indirect_declarator
10565 (code
, class_type
, cv_quals
, declarator
);
10571 /* Parse an (optional) ctor-initializer.
10574 : mem-initializer-list
10576 Returns TRUE iff the ctor-initializer was actually present. */
10579 cp_parser_ctor_initializer_opt (cp_parser
* parser
)
10581 /* If the next token is not a `:', then there is no
10582 ctor-initializer. */
10583 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COLON
))
10585 /* Do default initialization of any bases and members. */
10586 if (DECL_CONSTRUCTOR_P (current_function_decl
))
10587 finish_mem_initializers (NULL_TREE
);
10592 /* Consume the `:' token. */
10593 cp_lexer_consume_token (parser
->lexer
);
10594 /* And the mem-initializer-list. */
10595 cp_parser_mem_initializer_list (parser
);
10600 /* Parse a mem-initializer-list.
10602 mem-initializer-list:
10603 mem-initializer ... [opt]
10604 mem-initializer ... [opt] , mem-initializer-list */
10607 cp_parser_mem_initializer_list (cp_parser
* parser
)
10609 tree mem_initializer_list
= NULL_TREE
;
10610 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
10612 /* Let the semantic analysis code know that we are starting the
10613 mem-initializer-list. */
10614 if (!DECL_CONSTRUCTOR_P (current_function_decl
))
10615 error_at (token
->location
,
10616 "only constructors take member initializers");
10618 /* Loop through the list. */
10621 tree mem_initializer
;
10623 token
= cp_lexer_peek_token (parser
->lexer
);
10624 /* Parse the mem-initializer. */
10625 mem_initializer
= cp_parser_mem_initializer (parser
);
10626 /* If the next token is a `...', we're expanding member initializers. */
10627 if (cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
10629 /* Consume the `...'. */
10630 cp_lexer_consume_token (parser
->lexer
);
10632 /* The TREE_PURPOSE must be a _TYPE, because base-specifiers
10633 can be expanded but members cannot. */
10634 if (mem_initializer
!= error_mark_node
10635 && !TYPE_P (TREE_PURPOSE (mem_initializer
)))
10637 error_at (token
->location
,
10638 "cannot expand initializer for member %<%D%>",
10639 TREE_PURPOSE (mem_initializer
));
10640 mem_initializer
= error_mark_node
;
10643 /* Construct the pack expansion type. */
10644 if (mem_initializer
!= error_mark_node
)
10645 mem_initializer
= make_pack_expansion (mem_initializer
);
10647 /* Add it to the list, unless it was erroneous. */
10648 if (mem_initializer
!= error_mark_node
)
10650 TREE_CHAIN (mem_initializer
) = mem_initializer_list
;
10651 mem_initializer_list
= mem_initializer
;
10653 /* If the next token is not a `,', we're done. */
10654 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COMMA
))
10656 /* Consume the `,' token. */
10657 cp_lexer_consume_token (parser
->lexer
);
10660 /* Perform semantic analysis. */
10661 if (DECL_CONSTRUCTOR_P (current_function_decl
))
10662 finish_mem_initializers (mem_initializer_list
);
10665 /* Parse a mem-initializer.
10668 mem-initializer-id ( expression-list [opt] )
10669 mem-initializer-id braced-init-list
10674 ( expression-list [opt] )
10676 Returns a TREE_LIST. The TREE_PURPOSE is the TYPE (for a base
10677 class) or FIELD_DECL (for a non-static data member) to initialize;
10678 the TREE_VALUE is the expression-list. An empty initialization
10679 list is represented by void_list_node. */
10682 cp_parser_mem_initializer (cp_parser
* parser
)
10684 tree mem_initializer_id
;
10685 tree expression_list
;
10687 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
10689 /* Find out what is being initialized. */
10690 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_PAREN
))
10692 permerror (token
->location
,
10693 "anachronistic old-style base class initializer");
10694 mem_initializer_id
= NULL_TREE
;
10698 mem_initializer_id
= cp_parser_mem_initializer_id (parser
);
10699 if (mem_initializer_id
== error_mark_node
)
10700 return mem_initializer_id
;
10702 member
= expand_member_init (mem_initializer_id
);
10703 if (member
&& !DECL_P (member
))
10704 in_base_initializer
= 1;
10706 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
10708 bool expr_non_constant_p
;
10709 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
10710 expression_list
= cp_parser_braced_list (parser
, &expr_non_constant_p
);
10711 CONSTRUCTOR_IS_DIRECT_INIT (expression_list
) = 1;
10712 expression_list
= build_tree_list (NULL_TREE
, expression_list
);
10717 vec
= cp_parser_parenthesized_expression_list (parser
, non_attr
,
10719 /*allow_expansion_p=*/true,
10720 /*non_constant_p=*/NULL
);
10722 return error_mark_node
;
10723 expression_list
= build_tree_list_vec (vec
);
10724 release_tree_vector (vec
);
10727 if (expression_list
== error_mark_node
)
10728 return error_mark_node
;
10729 if (!expression_list
)
10730 expression_list
= void_type_node
;
10732 in_base_initializer
= 0;
10734 return member
? build_tree_list (member
, expression_list
) : error_mark_node
;
10737 /* Parse a mem-initializer-id.
10739 mem-initializer-id:
10740 :: [opt] nested-name-specifier [opt] class-name
10743 Returns a TYPE indicating the class to be initializer for the first
10744 production. Returns an IDENTIFIER_NODE indicating the data member
10745 to be initialized for the second production. */
10748 cp_parser_mem_initializer_id (cp_parser
* parser
)
10750 bool global_scope_p
;
10751 bool nested_name_specifier_p
;
10752 bool template_p
= false;
10755 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
10757 /* `typename' is not allowed in this context ([temp.res]). */
10758 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_TYPENAME
))
10760 error_at (token
->location
,
10761 "keyword %<typename%> not allowed in this context (a qualified "
10762 "member initializer is implicitly a type)");
10763 cp_lexer_consume_token (parser
->lexer
);
10765 /* Look for the optional `::' operator. */
10767 = (cp_parser_global_scope_opt (parser
,
10768 /*current_scope_valid_p=*/false)
10770 /* Look for the optional nested-name-specifier. The simplest way to
10775 The keyword `typename' is not permitted in a base-specifier or
10776 mem-initializer; in these contexts a qualified name that
10777 depends on a template-parameter is implicitly assumed to be a
10780 is to assume that we have seen the `typename' keyword at this
10782 nested_name_specifier_p
10783 = (cp_parser_nested_name_specifier_opt (parser
,
10784 /*typename_keyword_p=*/true,
10785 /*check_dependency_p=*/true,
10787 /*is_declaration=*/true)
10789 if (nested_name_specifier_p
)
10790 template_p
= cp_parser_optional_template_keyword (parser
);
10791 /* If there is a `::' operator or a nested-name-specifier, then we
10792 are definitely looking for a class-name. */
10793 if (global_scope_p
|| nested_name_specifier_p
)
10794 return cp_parser_class_name (parser
,
10795 /*typename_keyword_p=*/true,
10796 /*template_keyword_p=*/template_p
,
10798 /*check_dependency_p=*/true,
10799 /*class_head_p=*/false,
10800 /*is_declaration=*/true);
10801 /* Otherwise, we could also be looking for an ordinary identifier. */
10802 cp_parser_parse_tentatively (parser
);
10803 /* Try a class-name. */
10804 id
= cp_parser_class_name (parser
,
10805 /*typename_keyword_p=*/true,
10806 /*template_keyword_p=*/false,
10808 /*check_dependency_p=*/true,
10809 /*class_head_p=*/false,
10810 /*is_declaration=*/true);
10811 /* If we found one, we're done. */
10812 if (cp_parser_parse_definitely (parser
))
10814 /* Otherwise, look for an ordinary identifier. */
10815 return cp_parser_identifier (parser
);
10818 /* Overloading [gram.over] */
10820 /* Parse an operator-function-id.
10822 operator-function-id:
10825 Returns an IDENTIFIER_NODE for the operator which is a
10826 human-readable spelling of the identifier, e.g., `operator +'. */
10829 cp_parser_operator_function_id (cp_parser
* parser
)
10831 /* Look for the `operator' keyword. */
10832 if (!cp_parser_require_keyword (parser
, RID_OPERATOR
, RT_OPERATOR
))
10833 return error_mark_node
;
10834 /* And then the name of the operator itself. */
10835 return cp_parser_operator (parser
);
10838 /* Parse an operator.
10841 new delete new[] delete[] + - * / % ^ & | ~ ! = < >
10842 += -= *= /= %= ^= &= |= << >> >>= <<= == != <= >= &&
10843 || ++ -- , ->* -> () []
10850 Returns an IDENTIFIER_NODE for the operator which is a
10851 human-readable spelling of the identifier, e.g., `operator +'. */
10854 cp_parser_operator (cp_parser
* parser
)
10856 tree id
= NULL_TREE
;
10859 /* Peek at the next token. */
10860 token
= cp_lexer_peek_token (parser
->lexer
);
10861 /* Figure out which operator we have. */
10862 switch (token
->type
)
10868 /* The keyword should be either `new' or `delete'. */
10869 if (token
->keyword
== RID_NEW
)
10871 else if (token
->keyword
== RID_DELETE
)
10876 /* Consume the `new' or `delete' token. */
10877 cp_lexer_consume_token (parser
->lexer
);
10879 /* Peek at the next token. */
10880 token
= cp_lexer_peek_token (parser
->lexer
);
10881 /* If it's a `[' token then this is the array variant of the
10883 if (token
->type
== CPP_OPEN_SQUARE
)
10885 /* Consume the `[' token. */
10886 cp_lexer_consume_token (parser
->lexer
);
10887 /* Look for the `]' token. */
10888 cp_parser_require (parser
, CPP_CLOSE_SQUARE
, RT_CLOSE_SQUARE
);
10889 id
= ansi_opname (op
== NEW_EXPR
10890 ? VEC_NEW_EXPR
: VEC_DELETE_EXPR
);
10892 /* Otherwise, we have the non-array variant. */
10894 id
= ansi_opname (op
);
10900 id
= ansi_opname (PLUS_EXPR
);
10904 id
= ansi_opname (MINUS_EXPR
);
10908 id
= ansi_opname (MULT_EXPR
);
10912 id
= ansi_opname (TRUNC_DIV_EXPR
);
10916 id
= ansi_opname (TRUNC_MOD_EXPR
);
10920 id
= ansi_opname (BIT_XOR_EXPR
);
10924 id
= ansi_opname (BIT_AND_EXPR
);
10928 id
= ansi_opname (BIT_IOR_EXPR
);
10932 id
= ansi_opname (BIT_NOT_EXPR
);
10936 id
= ansi_opname (TRUTH_NOT_EXPR
);
10940 id
= ansi_assopname (NOP_EXPR
);
10944 id
= ansi_opname (LT_EXPR
);
10948 id
= ansi_opname (GT_EXPR
);
10952 id
= ansi_assopname (PLUS_EXPR
);
10956 id
= ansi_assopname (MINUS_EXPR
);
10960 id
= ansi_assopname (MULT_EXPR
);
10964 id
= ansi_assopname (TRUNC_DIV_EXPR
);
10968 id
= ansi_assopname (TRUNC_MOD_EXPR
);
10972 id
= ansi_assopname (BIT_XOR_EXPR
);
10976 id
= ansi_assopname (BIT_AND_EXPR
);
10980 id
= ansi_assopname (BIT_IOR_EXPR
);
10984 id
= ansi_opname (LSHIFT_EXPR
);
10988 id
= ansi_opname (RSHIFT_EXPR
);
10991 case CPP_LSHIFT_EQ
:
10992 id
= ansi_assopname (LSHIFT_EXPR
);
10995 case CPP_RSHIFT_EQ
:
10996 id
= ansi_assopname (RSHIFT_EXPR
);
11000 id
= ansi_opname (EQ_EXPR
);
11004 id
= ansi_opname (NE_EXPR
);
11008 id
= ansi_opname (LE_EXPR
);
11011 case CPP_GREATER_EQ
:
11012 id
= ansi_opname (GE_EXPR
);
11016 id
= ansi_opname (TRUTH_ANDIF_EXPR
);
11020 id
= ansi_opname (TRUTH_ORIF_EXPR
);
11023 case CPP_PLUS_PLUS
:
11024 id
= ansi_opname (POSTINCREMENT_EXPR
);
11027 case CPP_MINUS_MINUS
:
11028 id
= ansi_opname (PREDECREMENT_EXPR
);
11032 id
= ansi_opname (COMPOUND_EXPR
);
11035 case CPP_DEREF_STAR
:
11036 id
= ansi_opname (MEMBER_REF
);
11040 id
= ansi_opname (COMPONENT_REF
);
11043 case CPP_OPEN_PAREN
:
11044 /* Consume the `('. */
11045 cp_lexer_consume_token (parser
->lexer
);
11046 /* Look for the matching `)'. */
11047 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
11048 return ansi_opname (CALL_EXPR
);
11050 case CPP_OPEN_SQUARE
:
11051 /* Consume the `['. */
11052 cp_lexer_consume_token (parser
->lexer
);
11053 /* Look for the matching `]'. */
11054 cp_parser_require (parser
, CPP_CLOSE_SQUARE
, RT_CLOSE_SQUARE
);
11055 return ansi_opname (ARRAY_REF
);
11058 /* Anything else is an error. */
11062 /* If we have selected an identifier, we need to consume the
11065 cp_lexer_consume_token (parser
->lexer
);
11066 /* Otherwise, no valid operator name was present. */
11069 cp_parser_error (parser
, "expected operator");
11070 id
= error_mark_node
;
11076 /* Parse a template-declaration.
11078 template-declaration:
11079 export [opt] template < template-parameter-list > declaration
11081 If MEMBER_P is TRUE, this template-declaration occurs within a
11084 The grammar rule given by the standard isn't correct. What
11085 is really meant is:
11087 template-declaration:
11088 export [opt] template-parameter-list-seq
11089 decl-specifier-seq [opt] init-declarator [opt] ;
11090 export [opt] template-parameter-list-seq
11091 function-definition
11093 template-parameter-list-seq:
11094 template-parameter-list-seq [opt]
11095 template < template-parameter-list > */
11098 cp_parser_template_declaration (cp_parser
* parser
, bool member_p
)
11100 /* Check for `export'. */
11101 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_EXPORT
))
11103 /* Consume the `export' token. */
11104 cp_lexer_consume_token (parser
->lexer
);
11105 /* Warn that we do not support `export'. */
11106 warning (0, "keyword %<export%> not implemented, and will be ignored");
11109 cp_parser_template_declaration_after_export (parser
, member_p
);
11112 /* Parse a template-parameter-list.
11114 template-parameter-list:
11116 template-parameter-list , template-parameter
11118 Returns a TREE_LIST. Each node represents a template parameter.
11119 The nodes are connected via their TREE_CHAINs. */
11122 cp_parser_template_parameter_list (cp_parser
* parser
)
11124 tree parameter_list
= NULL_TREE
;
11126 begin_template_parm_list ();
11128 /* The loop below parses the template parms. We first need to know
11129 the total number of template parms to be able to compute proper
11130 canonical types of each dependent type. So after the loop, when
11131 we know the total number of template parms,
11132 end_template_parm_list computes the proper canonical types and
11133 fixes up the dependent types accordingly. */
11138 bool is_parameter_pack
;
11139 location_t parm_loc
;
11141 /* Parse the template-parameter. */
11142 parm_loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
11143 parameter
= cp_parser_template_parameter (parser
,
11145 &is_parameter_pack
);
11146 /* Add it to the list. */
11147 if (parameter
!= error_mark_node
)
11148 parameter_list
= process_template_parm (parameter_list
,
11156 tree err_parm
= build_tree_list (parameter
, parameter
);
11157 parameter_list
= chainon (parameter_list
, err_parm
);
11160 /* If the next token is not a `,', we're done. */
11161 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COMMA
))
11163 /* Otherwise, consume the `,' token. */
11164 cp_lexer_consume_token (parser
->lexer
);
11167 return end_template_parm_list (parameter_list
);
11170 /* Parse a template-parameter.
11172 template-parameter:
11174 parameter-declaration
11176 If all goes well, returns a TREE_LIST. The TREE_VALUE represents
11177 the parameter. The TREE_PURPOSE is the default value, if any.
11178 Returns ERROR_MARK_NODE on failure. *IS_NON_TYPE is set to true
11179 iff this parameter is a non-type parameter. *IS_PARAMETER_PACK is
11180 set to true iff this parameter is a parameter pack. */
11183 cp_parser_template_parameter (cp_parser
* parser
, bool *is_non_type
,
11184 bool *is_parameter_pack
)
11187 cp_parameter_declarator
*parameter_declarator
;
11188 cp_declarator
*id_declarator
;
11191 /* Assume it is a type parameter or a template parameter. */
11192 *is_non_type
= false;
11193 /* Assume it not a parameter pack. */
11194 *is_parameter_pack
= false;
11195 /* Peek at the next token. */
11196 token
= cp_lexer_peek_token (parser
->lexer
);
11197 /* If it is `class' or `template', we have a type-parameter. */
11198 if (token
->keyword
== RID_TEMPLATE
)
11199 return cp_parser_type_parameter (parser
, is_parameter_pack
);
11200 /* If it is `class' or `typename' we do not know yet whether it is a
11201 type parameter or a non-type parameter. Consider:
11203 template <typename T, typename T::X X> ...
11207 template <class C, class D*> ...
11209 Here, the first parameter is a type parameter, and the second is
11210 a non-type parameter. We can tell by looking at the token after
11211 the identifier -- if it is a `,', `=', or `>' then we have a type
11213 if (token
->keyword
== RID_TYPENAME
|| token
->keyword
== RID_CLASS
)
11215 /* Peek at the token after `class' or `typename'. */
11216 token
= cp_lexer_peek_nth_token (parser
->lexer
, 2);
11217 /* If it's an ellipsis, we have a template type parameter
11219 if (token
->type
== CPP_ELLIPSIS
)
11220 return cp_parser_type_parameter (parser
, is_parameter_pack
);
11221 /* If it's an identifier, skip it. */
11222 if (token
->type
== CPP_NAME
)
11223 token
= cp_lexer_peek_nth_token (parser
->lexer
, 3);
11224 /* Now, see if the token looks like the end of a template
11226 if (token
->type
== CPP_COMMA
11227 || token
->type
== CPP_EQ
11228 || token
->type
== CPP_GREATER
)
11229 return cp_parser_type_parameter (parser
, is_parameter_pack
);
11232 /* Otherwise, it is a non-type parameter.
11236 When parsing a default template-argument for a non-type
11237 template-parameter, the first non-nested `>' is taken as the end
11238 of the template parameter-list rather than a greater-than
11240 *is_non_type
= true;
11241 parameter_declarator
11242 = cp_parser_parameter_declaration (parser
, /*template_parm_p=*/true,
11243 /*parenthesized_p=*/NULL
);
11245 /* If the parameter declaration is marked as a parameter pack, set
11246 *IS_PARAMETER_PACK to notify the caller. Also, unmark the
11247 declarator's PACK_EXPANSION_P, otherwise we'll get errors from
11249 if (parameter_declarator
11250 && parameter_declarator
->declarator
11251 && parameter_declarator
->declarator
->parameter_pack_p
)
11253 *is_parameter_pack
= true;
11254 parameter_declarator
->declarator
->parameter_pack_p
= false;
11257 /* If the next token is an ellipsis, and we don't already have it
11258 marked as a parameter pack, then we have a parameter pack (that
11259 has no declarator). */
11260 if (!*is_parameter_pack
11261 && cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
)
11262 && declarator_can_be_parameter_pack (parameter_declarator
->declarator
))
11264 /* Consume the `...'. */
11265 cp_lexer_consume_token (parser
->lexer
);
11266 maybe_warn_variadic_templates ();
11268 *is_parameter_pack
= true;
11270 /* We might end up with a pack expansion as the type of the non-type
11271 template parameter, in which case this is a non-type template
11273 else if (parameter_declarator
11274 && parameter_declarator
->decl_specifiers
.type
11275 && PACK_EXPANSION_P (parameter_declarator
->decl_specifiers
.type
))
11277 *is_parameter_pack
= true;
11278 parameter_declarator
->decl_specifiers
.type
=
11279 PACK_EXPANSION_PATTERN (parameter_declarator
->decl_specifiers
.type
);
11282 if (*is_parameter_pack
&& cp_lexer_next_token_is (parser
->lexer
, CPP_EQ
))
11284 /* Parameter packs cannot have default arguments. However, a
11285 user may try to do so, so we'll parse them and give an
11286 appropriate diagnostic here. */
11288 /* Consume the `='. */
11289 cp_token
*start_token
= cp_lexer_peek_token (parser
->lexer
);
11290 cp_lexer_consume_token (parser
->lexer
);
11292 /* Find the name of the parameter pack. */
11293 id_declarator
= parameter_declarator
->declarator
;
11294 while (id_declarator
&& id_declarator
->kind
!= cdk_id
)
11295 id_declarator
= id_declarator
->declarator
;
11297 if (id_declarator
&& id_declarator
->kind
== cdk_id
)
11298 error_at (start_token
->location
,
11299 "template parameter pack %qD cannot have a default argument",
11300 id_declarator
->u
.id
.unqualified_name
);
11302 error_at (start_token
->location
,
11303 "template parameter pack cannot have a default argument");
11305 /* Parse the default argument, but throw away the result. */
11306 cp_parser_default_argument (parser
, /*template_parm_p=*/true);
11309 parm
= grokdeclarator (parameter_declarator
->declarator
,
11310 ¶meter_declarator
->decl_specifiers
,
11311 TPARM
, /*initialized=*/0,
11312 /*attrlist=*/NULL
);
11313 if (parm
== error_mark_node
)
11314 return error_mark_node
;
11316 return build_tree_list (parameter_declarator
->default_argument
, parm
);
11319 /* Parse a type-parameter.
11322 class identifier [opt]
11323 class identifier [opt] = type-id
11324 typename identifier [opt]
11325 typename identifier [opt] = type-id
11326 template < template-parameter-list > class identifier [opt]
11327 template < template-parameter-list > class identifier [opt]
11330 GNU Extension (variadic templates):
11333 class ... identifier [opt]
11334 typename ... identifier [opt]
11336 Returns a TREE_LIST. The TREE_VALUE is itself a TREE_LIST. The
11337 TREE_PURPOSE is the default-argument, if any. The TREE_VALUE is
11338 the declaration of the parameter.
11340 Sets *IS_PARAMETER_PACK if this is a template parameter pack. */
11343 cp_parser_type_parameter (cp_parser
* parser
, bool *is_parameter_pack
)
11348 /* Look for a keyword to tell us what kind of parameter this is. */
11349 token
= cp_parser_require (parser
, CPP_KEYWORD
, RT_CLASS_TYPENAME_TEMPLATE
);
11351 return error_mark_node
;
11353 switch (token
->keyword
)
11359 tree default_argument
;
11361 /* If the next token is an ellipsis, we have a template
11363 if (cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
11365 /* Consume the `...' token. */
11366 cp_lexer_consume_token (parser
->lexer
);
11367 maybe_warn_variadic_templates ();
11369 *is_parameter_pack
= true;
11372 /* If the next token is an identifier, then it names the
11374 if (cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
))
11375 identifier
= cp_parser_identifier (parser
);
11377 identifier
= NULL_TREE
;
11379 /* Create the parameter. */
11380 parameter
= finish_template_type_parm (class_type_node
, identifier
);
11382 /* If the next token is an `=', we have a default argument. */
11383 if (cp_lexer_next_token_is (parser
->lexer
, CPP_EQ
))
11385 /* Consume the `=' token. */
11386 cp_lexer_consume_token (parser
->lexer
);
11387 /* Parse the default-argument. */
11388 push_deferring_access_checks (dk_no_deferred
);
11389 default_argument
= cp_parser_type_id (parser
);
11391 /* Template parameter packs cannot have default
11393 if (*is_parameter_pack
)
11396 error_at (token
->location
,
11397 "template parameter pack %qD cannot have a "
11398 "default argument", identifier
);
11400 error_at (token
->location
,
11401 "template parameter packs cannot have "
11402 "default arguments");
11403 default_argument
= NULL_TREE
;
11405 pop_deferring_access_checks ();
11408 default_argument
= NULL_TREE
;
11410 /* Create the combined representation of the parameter and the
11411 default argument. */
11412 parameter
= build_tree_list (default_argument
, parameter
);
11419 tree default_argument
;
11421 /* Look for the `<'. */
11422 cp_parser_require (parser
, CPP_LESS
, RT_LESS
);
11423 /* Parse the template-parameter-list. */
11424 cp_parser_template_parameter_list (parser
);
11425 /* Look for the `>'. */
11426 cp_parser_require (parser
, CPP_GREATER
, RT_GREATER
);
11427 /* Look for the `class' keyword. */
11428 cp_parser_require_keyword (parser
, RID_CLASS
, RT_CLASS
);
11429 /* If the next token is an ellipsis, we have a template
11431 if (cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
11433 /* Consume the `...' token. */
11434 cp_lexer_consume_token (parser
->lexer
);
11435 maybe_warn_variadic_templates ();
11437 *is_parameter_pack
= true;
11439 /* If the next token is an `=', then there is a
11440 default-argument. If the next token is a `>', we are at
11441 the end of the parameter-list. If the next token is a `,',
11442 then we are at the end of this parameter. */
11443 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_EQ
)
11444 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_GREATER
)
11445 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_COMMA
))
11447 identifier
= cp_parser_identifier (parser
);
11448 /* Treat invalid names as if the parameter were nameless. */
11449 if (identifier
== error_mark_node
)
11450 identifier
= NULL_TREE
;
11453 identifier
= NULL_TREE
;
11455 /* Create the template parameter. */
11456 parameter
= finish_template_template_parm (class_type_node
,
11459 /* If the next token is an `=', then there is a
11460 default-argument. */
11461 if (cp_lexer_next_token_is (parser
->lexer
, CPP_EQ
))
11465 /* Consume the `='. */
11466 cp_lexer_consume_token (parser
->lexer
);
11467 /* Parse the id-expression. */
11468 push_deferring_access_checks (dk_no_deferred
);
11469 /* save token before parsing the id-expression, for error
11471 token
= cp_lexer_peek_token (parser
->lexer
);
11473 = cp_parser_id_expression (parser
,
11474 /*template_keyword_p=*/false,
11475 /*check_dependency_p=*/true,
11476 /*template_p=*/&is_template
,
11477 /*declarator_p=*/false,
11478 /*optional_p=*/false);
11479 if (TREE_CODE (default_argument
) == TYPE_DECL
)
11480 /* If the id-expression was a template-id that refers to
11481 a template-class, we already have the declaration here,
11482 so no further lookup is needed. */
11485 /* Look up the name. */
11487 = cp_parser_lookup_name (parser
, default_argument
,
11489 /*is_template=*/is_template
,
11490 /*is_namespace=*/false,
11491 /*check_dependency=*/true,
11492 /*ambiguous_decls=*/NULL
,
11494 /* See if the default argument is valid. */
11496 = check_template_template_default_arg (default_argument
);
11498 /* Template parameter packs cannot have default
11500 if (*is_parameter_pack
)
11503 error_at (token
->location
,
11504 "template parameter pack %qD cannot "
11505 "have a default argument",
11508 error_at (token
->location
, "template parameter packs cannot "
11509 "have default arguments");
11510 default_argument
= NULL_TREE
;
11512 pop_deferring_access_checks ();
11515 default_argument
= NULL_TREE
;
11517 /* Create the combined representation of the parameter and the
11518 default argument. */
11519 parameter
= build_tree_list (default_argument
, parameter
);
11524 gcc_unreachable ();
11531 /* Parse a template-id.
11534 template-name < template-argument-list [opt] >
11536 If TEMPLATE_KEYWORD_P is TRUE, then we have just seen the
11537 `template' keyword. In this case, a TEMPLATE_ID_EXPR will be
11538 returned. Otherwise, if the template-name names a function, or set
11539 of functions, returns a TEMPLATE_ID_EXPR. If the template-name
11540 names a class, returns a TYPE_DECL for the specialization.
11542 If CHECK_DEPENDENCY_P is FALSE, names are looked up in
11543 uninstantiated templates. */
11546 cp_parser_template_id (cp_parser
*parser
,
11547 bool template_keyword_p
,
11548 bool check_dependency_p
,
11549 bool is_declaration
)
11555 cp_token_position start_of_id
= 0;
11556 deferred_access_check
*chk
;
11557 VEC (deferred_access_check
,gc
) *access_check
;
11558 cp_token
*next_token
= NULL
, *next_token_2
= NULL
;
11559 bool is_identifier
;
11561 /* If the next token corresponds to a template-id, there is no need
11563 next_token
= cp_lexer_peek_token (parser
->lexer
);
11564 if (next_token
->type
== CPP_TEMPLATE_ID
)
11566 struct tree_check
*check_value
;
11568 /* Get the stored value. */
11569 check_value
= cp_lexer_consume_token (parser
->lexer
)->u
.tree_check_value
;
11570 /* Perform any access checks that were deferred. */
11571 access_check
= check_value
->checks
;
11574 FOR_EACH_VEC_ELT (deferred_access_check
, access_check
, i
, chk
)
11575 perform_or_defer_access_check (chk
->binfo
,
11579 /* Return the stored value. */
11580 return check_value
->value
;
11583 /* Avoid performing name lookup if there is no possibility of
11584 finding a template-id. */
11585 if ((next_token
->type
!= CPP_NAME
&& next_token
->keyword
!= RID_OPERATOR
)
11586 || (next_token
->type
== CPP_NAME
11587 && !cp_parser_nth_token_starts_template_argument_list_p
11590 cp_parser_error (parser
, "expected template-id");
11591 return error_mark_node
;
11594 /* Remember where the template-id starts. */
11595 if (cp_parser_uncommitted_to_tentative_parse_p (parser
))
11596 start_of_id
= cp_lexer_token_position (parser
->lexer
, false);
11598 push_deferring_access_checks (dk_deferred
);
11600 /* Parse the template-name. */
11601 is_identifier
= false;
11602 templ
= cp_parser_template_name (parser
, template_keyword_p
,
11603 check_dependency_p
,
11606 if (templ
== error_mark_node
|| is_identifier
)
11608 pop_deferring_access_checks ();
11612 /* If we find the sequence `[:' after a template-name, it's probably
11613 a digraph-typo for `< ::'. Substitute the tokens and check if we can
11614 parse correctly the argument list. */
11615 next_token
= cp_lexer_peek_token (parser
->lexer
);
11616 next_token_2
= cp_lexer_peek_nth_token (parser
->lexer
, 2);
11617 if (next_token
->type
== CPP_OPEN_SQUARE
11618 && next_token
->flags
& DIGRAPH
11619 && next_token_2
->type
== CPP_COLON
11620 && !(next_token_2
->flags
& PREV_WHITE
))
11622 cp_parser_parse_tentatively (parser
);
11623 /* Change `:' into `::'. */
11624 next_token_2
->type
= CPP_SCOPE
;
11625 /* Consume the first token (CPP_OPEN_SQUARE - which we pretend it is
11627 cp_lexer_consume_token (parser
->lexer
);
11629 /* Parse the arguments. */
11630 arguments
= cp_parser_enclosed_template_argument_list (parser
);
11631 if (!cp_parser_parse_definitely (parser
))
11633 /* If we couldn't parse an argument list, then we revert our changes
11634 and return simply an error. Maybe this is not a template-id
11636 next_token_2
->type
= CPP_COLON
;
11637 cp_parser_error (parser
, "expected %<<%>");
11638 pop_deferring_access_checks ();
11639 return error_mark_node
;
11641 /* Otherwise, emit an error about the invalid digraph, but continue
11642 parsing because we got our argument list. */
11643 if (permerror (next_token
->location
,
11644 "%<<::%> cannot begin a template-argument list"))
11646 static bool hint
= false;
11647 inform (next_token
->location
,
11648 "%<<:%> is an alternate spelling for %<[%>."
11649 " Insert whitespace between %<<%> and %<::%>");
11650 if (!hint
&& !flag_permissive
)
11652 inform (next_token
->location
, "(if you use %<-fpermissive%>"
11653 " G++ will accept your code)");
11660 /* Look for the `<' that starts the template-argument-list. */
11661 if (!cp_parser_require (parser
, CPP_LESS
, RT_LESS
))
11663 pop_deferring_access_checks ();
11664 return error_mark_node
;
11666 /* Parse the arguments. */
11667 arguments
= cp_parser_enclosed_template_argument_list (parser
);
11670 /* Build a representation of the specialization. */
11671 if (TREE_CODE (templ
) == IDENTIFIER_NODE
)
11672 template_id
= build_min_nt (TEMPLATE_ID_EXPR
, templ
, arguments
);
11673 else if (DECL_CLASS_TEMPLATE_P (templ
)
11674 || DECL_TEMPLATE_TEMPLATE_PARM_P (templ
))
11676 bool entering_scope
;
11677 /* In "template <typename T> ... A<T>::", A<T> is the abstract A
11678 template (rather than some instantiation thereof) only if
11679 is not nested within some other construct. For example, in
11680 "template <typename T> void f(T) { A<T>::", A<T> is just an
11681 instantiation of A. */
11682 entering_scope
= (template_parm_scope_p ()
11683 && cp_lexer_next_token_is (parser
->lexer
,
11686 = finish_template_type (templ
, arguments
, entering_scope
);
11690 /* If it's not a class-template or a template-template, it should be
11691 a function-template. */
11692 gcc_assert ((DECL_FUNCTION_TEMPLATE_P (templ
)
11693 || TREE_CODE (templ
) == OVERLOAD
11694 || BASELINK_P (templ
)));
11696 template_id
= lookup_template_function (templ
, arguments
);
11699 /* If parsing tentatively, replace the sequence of tokens that makes
11700 up the template-id with a CPP_TEMPLATE_ID token. That way,
11701 should we re-parse the token stream, we will not have to repeat
11702 the effort required to do the parse, nor will we issue duplicate
11703 error messages about problems during instantiation of the
11707 cp_token
*token
= cp_lexer_token_at (parser
->lexer
, start_of_id
);
11709 /* Reset the contents of the START_OF_ID token. */
11710 token
->type
= CPP_TEMPLATE_ID
;
11711 /* Retrieve any deferred checks. Do not pop this access checks yet
11712 so the memory will not be reclaimed during token replacing below. */
11713 token
->u
.tree_check_value
= ggc_alloc_cleared_tree_check ();
11714 token
->u
.tree_check_value
->value
= template_id
;
11715 token
->u
.tree_check_value
->checks
= get_deferred_access_checks ();
11716 token
->keyword
= RID_MAX
;
11718 /* Purge all subsequent tokens. */
11719 cp_lexer_purge_tokens_after (parser
->lexer
, start_of_id
);
11721 /* ??? Can we actually assume that, if template_id ==
11722 error_mark_node, we will have issued a diagnostic to the
11723 user, as opposed to simply marking the tentative parse as
11725 if (cp_parser_error_occurred (parser
) && template_id
!= error_mark_node
)
11726 error_at (token
->location
, "parse error in template argument list");
11729 pop_deferring_access_checks ();
11730 return template_id
;
11733 /* Parse a template-name.
11738 The standard should actually say:
11742 operator-function-id
11744 A defect report has been filed about this issue.
11746 A conversion-function-id cannot be a template name because they cannot
11747 be part of a template-id. In fact, looking at this code:
11749 a.operator K<int>()
11751 the conversion-function-id is "operator K<int>", and K<int> is a type-id.
11752 It is impossible to call a templated conversion-function-id with an
11753 explicit argument list, since the only allowed template parameter is
11754 the type to which it is converting.
11756 If TEMPLATE_KEYWORD_P is true, then we have just seen the
11757 `template' keyword, in a construction like:
11761 In that case `f' is taken to be a template-name, even though there
11762 is no way of knowing for sure.
11764 Returns the TEMPLATE_DECL for the template, or an OVERLOAD if the
11765 name refers to a set of overloaded functions, at least one of which
11766 is a template, or an IDENTIFIER_NODE with the name of the template,
11767 if TEMPLATE_KEYWORD_P is true. If CHECK_DEPENDENCY_P is FALSE,
11768 names are looked up inside uninstantiated templates. */
11771 cp_parser_template_name (cp_parser
* parser
,
11772 bool template_keyword_p
,
11773 bool check_dependency_p
,
11774 bool is_declaration
,
11775 bool *is_identifier
)
11780 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
11782 /* If the next token is `operator', then we have either an
11783 operator-function-id or a conversion-function-id. */
11784 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_OPERATOR
))
11786 /* We don't know whether we're looking at an
11787 operator-function-id or a conversion-function-id. */
11788 cp_parser_parse_tentatively (parser
);
11789 /* Try an operator-function-id. */
11790 identifier
= cp_parser_operator_function_id (parser
);
11791 /* If that didn't work, try a conversion-function-id. */
11792 if (!cp_parser_parse_definitely (parser
))
11794 cp_parser_error (parser
, "expected template-name");
11795 return error_mark_node
;
11798 /* Look for the identifier. */
11800 identifier
= cp_parser_identifier (parser
);
11802 /* If we didn't find an identifier, we don't have a template-id. */
11803 if (identifier
== error_mark_node
)
11804 return error_mark_node
;
11806 /* If the name immediately followed the `template' keyword, then it
11807 is a template-name. However, if the next token is not `<', then
11808 we do not treat it as a template-name, since it is not being used
11809 as part of a template-id. This enables us to handle constructs
11812 template <typename T> struct S { S(); };
11813 template <typename T> S<T>::S();
11815 correctly. We would treat `S' as a template -- if it were `S<T>'
11816 -- but we do not if there is no `<'. */
11818 if (processing_template_decl
11819 && cp_parser_nth_token_starts_template_argument_list_p (parser
, 1))
11821 /* In a declaration, in a dependent context, we pretend that the
11822 "template" keyword was present in order to improve error
11823 recovery. For example, given:
11825 template <typename T> void f(T::X<int>);
11827 we want to treat "X<int>" as a template-id. */
11829 && !template_keyword_p
11830 && parser
->scope
&& TYPE_P (parser
->scope
)
11831 && check_dependency_p
11832 && dependent_scope_p (parser
->scope
)
11833 /* Do not do this for dtors (or ctors), since they never
11834 need the template keyword before their name. */
11835 && !constructor_name_p (identifier
, parser
->scope
))
11837 cp_token_position start
= 0;
11839 /* Explain what went wrong. */
11840 error_at (token
->location
, "non-template %qD used as template",
11842 inform (token
->location
, "use %<%T::template %D%> to indicate that it is a template",
11843 parser
->scope
, identifier
);
11844 /* If parsing tentatively, find the location of the "<" token. */
11845 if (cp_parser_simulate_error (parser
))
11846 start
= cp_lexer_token_position (parser
->lexer
, true);
11847 /* Parse the template arguments so that we can issue error
11848 messages about them. */
11849 cp_lexer_consume_token (parser
->lexer
);
11850 cp_parser_enclosed_template_argument_list (parser
);
11851 /* Skip tokens until we find a good place from which to
11852 continue parsing. */
11853 cp_parser_skip_to_closing_parenthesis (parser
,
11854 /*recovering=*/true,
11856 /*consume_paren=*/false);
11857 /* If parsing tentatively, permanently remove the
11858 template argument list. That will prevent duplicate
11859 error messages from being issued about the missing
11860 "template" keyword. */
11862 cp_lexer_purge_tokens_after (parser
->lexer
, start
);
11864 *is_identifier
= true;
11868 /* If the "template" keyword is present, then there is generally
11869 no point in doing name-lookup, so we just return IDENTIFIER.
11870 But, if the qualifying scope is non-dependent then we can
11871 (and must) do name-lookup normally. */
11872 if (template_keyword_p
11874 || (TYPE_P (parser
->scope
)
11875 && dependent_type_p (parser
->scope
))))
11879 /* Look up the name. */
11880 decl
= cp_parser_lookup_name (parser
, identifier
,
11882 /*is_template=*/true,
11883 /*is_namespace=*/false,
11884 check_dependency_p
,
11885 /*ambiguous_decls=*/NULL
,
11888 /* If DECL is a template, then the name was a template-name. */
11889 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
11893 tree fn
= NULL_TREE
;
11895 /* The standard does not explicitly indicate whether a name that
11896 names a set of overloaded declarations, some of which are
11897 templates, is a template-name. However, such a name should
11898 be a template-name; otherwise, there is no way to form a
11899 template-id for the overloaded templates. */
11900 fns
= BASELINK_P (decl
) ? BASELINK_FUNCTIONS (decl
) : decl
;
11901 if (TREE_CODE (fns
) == OVERLOAD
)
11902 for (fn
= fns
; fn
; fn
= OVL_NEXT (fn
))
11903 if (TREE_CODE (OVL_CURRENT (fn
)) == TEMPLATE_DECL
)
11908 /* The name does not name a template. */
11909 cp_parser_error (parser
, "expected template-name");
11910 return error_mark_node
;
11914 /* If DECL is dependent, and refers to a function, then just return
11915 its name; we will look it up again during template instantiation. */
11916 if (DECL_FUNCTION_TEMPLATE_P (decl
) || !DECL_P (decl
))
11918 tree scope
= CP_DECL_CONTEXT (get_first_fn (decl
));
11919 if (TYPE_P (scope
) && dependent_type_p (scope
))
11926 /* Parse a template-argument-list.
11928 template-argument-list:
11929 template-argument ... [opt]
11930 template-argument-list , template-argument ... [opt]
11932 Returns a TREE_VEC containing the arguments. */
11935 cp_parser_template_argument_list (cp_parser
* parser
)
11937 tree fixed_args
[10];
11938 unsigned n_args
= 0;
11939 unsigned alloced
= 10;
11940 tree
*arg_ary
= fixed_args
;
11942 bool saved_in_template_argument_list_p
;
11944 bool saved_non_ice_p
;
11946 saved_in_template_argument_list_p
= parser
->in_template_argument_list_p
;
11947 parser
->in_template_argument_list_p
= true;
11948 /* Even if the template-id appears in an integral
11949 constant-expression, the contents of the argument list do
11951 saved_ice_p
= parser
->integral_constant_expression_p
;
11952 parser
->integral_constant_expression_p
= false;
11953 saved_non_ice_p
= parser
->non_integral_constant_expression_p
;
11954 parser
->non_integral_constant_expression_p
= false;
11955 /* Parse the arguments. */
11961 /* Consume the comma. */
11962 cp_lexer_consume_token (parser
->lexer
);
11964 /* Parse the template-argument. */
11965 argument
= cp_parser_template_argument (parser
);
11967 /* If the next token is an ellipsis, we're expanding a template
11969 if (cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
11971 if (argument
== error_mark_node
)
11973 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
11974 error_at (token
->location
,
11975 "expected parameter pack before %<...%>");
11977 /* Consume the `...' token. */
11978 cp_lexer_consume_token (parser
->lexer
);
11980 /* Make the argument into a TYPE_PACK_EXPANSION or
11981 EXPR_PACK_EXPANSION. */
11982 argument
= make_pack_expansion (argument
);
11985 if (n_args
== alloced
)
11989 if (arg_ary
== fixed_args
)
11991 arg_ary
= XNEWVEC (tree
, alloced
);
11992 memcpy (arg_ary
, fixed_args
, sizeof (tree
) * n_args
);
11995 arg_ary
= XRESIZEVEC (tree
, arg_ary
, alloced
);
11997 arg_ary
[n_args
++] = argument
;
11999 while (cp_lexer_next_token_is (parser
->lexer
, CPP_COMMA
));
12001 vec
= make_tree_vec (n_args
);
12004 TREE_VEC_ELT (vec
, n_args
) = arg_ary
[n_args
];
12006 if (arg_ary
!= fixed_args
)
12008 parser
->non_integral_constant_expression_p
= saved_non_ice_p
;
12009 parser
->integral_constant_expression_p
= saved_ice_p
;
12010 parser
->in_template_argument_list_p
= saved_in_template_argument_list_p
;
12011 #ifdef ENABLE_CHECKING
12012 SET_NON_DEFAULT_TEMPLATE_ARGS_COUNT (vec
, TREE_VEC_LENGTH (vec
));
12017 /* Parse a template-argument.
12020 assignment-expression
12024 The representation is that of an assignment-expression, type-id, or
12025 id-expression -- except that the qualified id-expression is
12026 evaluated, so that the value returned is either a DECL or an
12029 Although the standard says "assignment-expression", it forbids
12030 throw-expressions or assignments in the template argument.
12031 Therefore, we use "conditional-expression" instead. */
12034 cp_parser_template_argument (cp_parser
* parser
)
12039 bool maybe_type_id
= false;
12040 cp_token
*token
= NULL
, *argument_start_token
= NULL
;
12043 /* There's really no way to know what we're looking at, so we just
12044 try each alternative in order.
12048 In a template-argument, an ambiguity between a type-id and an
12049 expression is resolved to a type-id, regardless of the form of
12050 the corresponding template-parameter.
12052 Therefore, we try a type-id first. */
12053 cp_parser_parse_tentatively (parser
);
12054 argument
= cp_parser_template_type_arg (parser
);
12055 /* If there was no error parsing the type-id but the next token is a
12056 '>>', our behavior depends on which dialect of C++ we're
12057 parsing. In C++98, we probably found a typo for '> >'. But there
12058 are type-id which are also valid expressions. For instance:
12060 struct X { int operator >> (int); };
12061 template <int V> struct Foo {};
12064 Here 'X()' is a valid type-id of a function type, but the user just
12065 wanted to write the expression "X() >> 5". Thus, we remember that we
12066 found a valid type-id, but we still try to parse the argument as an
12067 expression to see what happens.
12069 In C++0x, the '>>' will be considered two separate '>'
12071 if (!cp_parser_error_occurred (parser
)
12072 && cxx_dialect
== cxx98
12073 && cp_lexer_next_token_is (parser
->lexer
, CPP_RSHIFT
))
12075 maybe_type_id
= true;
12076 cp_parser_abort_tentative_parse (parser
);
12080 /* If the next token isn't a `,' or a `>', then this argument wasn't
12081 really finished. This means that the argument is not a valid
12083 if (!cp_parser_next_token_ends_template_argument_p (parser
))
12084 cp_parser_error (parser
, "expected template-argument");
12085 /* If that worked, we're done. */
12086 if (cp_parser_parse_definitely (parser
))
12089 /* We're still not sure what the argument will be. */
12090 cp_parser_parse_tentatively (parser
);
12091 /* Try a template. */
12092 argument_start_token
= cp_lexer_peek_token (parser
->lexer
);
12093 argument
= cp_parser_id_expression (parser
,
12094 /*template_keyword_p=*/false,
12095 /*check_dependency_p=*/true,
12097 /*declarator_p=*/false,
12098 /*optional_p=*/false);
12099 /* If the next token isn't a `,' or a `>', then this argument wasn't
12100 really finished. */
12101 if (!cp_parser_next_token_ends_template_argument_p (parser
))
12102 cp_parser_error (parser
, "expected template-argument");
12103 if (!cp_parser_error_occurred (parser
))
12105 /* Figure out what is being referred to. If the id-expression
12106 was for a class template specialization, then we will have a
12107 TYPE_DECL at this point. There is no need to do name lookup
12108 at this point in that case. */
12109 if (TREE_CODE (argument
) != TYPE_DECL
)
12110 argument
= cp_parser_lookup_name (parser
, argument
,
12112 /*is_template=*/template_p
,
12113 /*is_namespace=*/false,
12114 /*check_dependency=*/true,
12115 /*ambiguous_decls=*/NULL
,
12116 argument_start_token
->location
);
12117 if (TREE_CODE (argument
) != TEMPLATE_DECL
12118 && TREE_CODE (argument
) != UNBOUND_CLASS_TEMPLATE
)
12119 cp_parser_error (parser
, "expected template-name");
12121 if (cp_parser_parse_definitely (parser
))
12123 /* It must be a non-type argument. There permitted cases are given
12124 in [temp.arg.nontype]:
12126 -- an integral constant-expression of integral or enumeration
12129 -- the name of a non-type template-parameter; or
12131 -- the name of an object or function with external linkage...
12133 -- the address of an object or function with external linkage...
12135 -- a pointer to member... */
12136 /* Look for a non-type template parameter. */
12137 if (cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
))
12139 cp_parser_parse_tentatively (parser
);
12140 argument
= cp_parser_primary_expression (parser
,
12141 /*address_p=*/false,
12143 /*template_arg_p=*/true,
12145 if (TREE_CODE (argument
) != TEMPLATE_PARM_INDEX
12146 || !cp_parser_next_token_ends_template_argument_p (parser
))
12147 cp_parser_simulate_error (parser
);
12148 if (cp_parser_parse_definitely (parser
))
12152 /* If the next token is "&", the argument must be the address of an
12153 object or function with external linkage. */
12154 address_p
= cp_lexer_next_token_is (parser
->lexer
, CPP_AND
);
12156 cp_lexer_consume_token (parser
->lexer
);
12157 /* See if we might have an id-expression. */
12158 token
= cp_lexer_peek_token (parser
->lexer
);
12159 if (token
->type
== CPP_NAME
12160 || token
->keyword
== RID_OPERATOR
12161 || token
->type
== CPP_SCOPE
12162 || token
->type
== CPP_TEMPLATE_ID
12163 || token
->type
== CPP_NESTED_NAME_SPECIFIER
)
12165 cp_parser_parse_tentatively (parser
);
12166 argument
= cp_parser_primary_expression (parser
,
12169 /*template_arg_p=*/true,
12171 if (cp_parser_error_occurred (parser
)
12172 || !cp_parser_next_token_ends_template_argument_p (parser
))
12173 cp_parser_abort_tentative_parse (parser
);
12178 if (TREE_CODE (argument
) == INDIRECT_REF
)
12180 gcc_assert (REFERENCE_REF_P (argument
));
12181 argument
= TREE_OPERAND (argument
, 0);
12184 /* If we're in a template, we represent a qualified-id referring
12185 to a static data member as a SCOPE_REF even if the scope isn't
12186 dependent so that we can check access control later. */
12188 if (TREE_CODE (probe
) == SCOPE_REF
)
12189 probe
= TREE_OPERAND (probe
, 1);
12190 if (TREE_CODE (probe
) == VAR_DECL
)
12192 /* A variable without external linkage might still be a
12193 valid constant-expression, so no error is issued here
12194 if the external-linkage check fails. */
12195 if (!address_p
&& !DECL_EXTERNAL_LINKAGE_P (probe
))
12196 cp_parser_simulate_error (parser
);
12198 else if (is_overloaded_fn (argument
))
12199 /* All overloaded functions are allowed; if the external
12200 linkage test does not pass, an error will be issued
12204 && (TREE_CODE (argument
) == OFFSET_REF
12205 || TREE_CODE (argument
) == SCOPE_REF
))
12206 /* A pointer-to-member. */
12208 else if (TREE_CODE (argument
) == TEMPLATE_PARM_INDEX
)
12211 cp_parser_simulate_error (parser
);
12213 if (cp_parser_parse_definitely (parser
))
12216 argument
= build_x_unary_op (ADDR_EXPR
, argument
,
12217 tf_warning_or_error
);
12222 /* If the argument started with "&", there are no other valid
12223 alternatives at this point. */
12226 cp_parser_error (parser
, "invalid non-type template argument");
12227 return error_mark_node
;
12230 /* If the argument wasn't successfully parsed as a type-id followed
12231 by '>>', the argument can only be a constant expression now.
12232 Otherwise, we try parsing the constant-expression tentatively,
12233 because the argument could really be a type-id. */
12235 cp_parser_parse_tentatively (parser
);
12236 argument
= cp_parser_constant_expression (parser
,
12237 /*allow_non_constant_p=*/false,
12238 /*non_constant_p=*/NULL
);
12239 argument
= fold_non_dependent_expr (argument
);
12240 if (!maybe_type_id
)
12242 if (!cp_parser_next_token_ends_template_argument_p (parser
))
12243 cp_parser_error (parser
, "expected template-argument");
12244 if (cp_parser_parse_definitely (parser
))
12246 /* We did our best to parse the argument as a non type-id, but that
12247 was the only alternative that matched (albeit with a '>' after
12248 it). We can assume it's just a typo from the user, and a
12249 diagnostic will then be issued. */
12250 return cp_parser_template_type_arg (parser
);
12253 /* Parse an explicit-instantiation.
12255 explicit-instantiation:
12256 template declaration
12258 Although the standard says `declaration', what it really means is:
12260 explicit-instantiation:
12261 template decl-specifier-seq [opt] declarator [opt] ;
12263 Things like `template int S<int>::i = 5, int S<double>::j;' are not
12264 supposed to be allowed. A defect report has been filed about this
12269 explicit-instantiation:
12270 storage-class-specifier template
12271 decl-specifier-seq [opt] declarator [opt] ;
12272 function-specifier template
12273 decl-specifier-seq [opt] declarator [opt] ; */
12276 cp_parser_explicit_instantiation (cp_parser
* parser
)
12278 int declares_class_or_enum
;
12279 cp_decl_specifier_seq decl_specifiers
;
12280 tree extension_specifier
= NULL_TREE
;
12282 /* Look for an (optional) storage-class-specifier or
12283 function-specifier. */
12284 if (cp_parser_allow_gnu_extensions_p (parser
))
12286 extension_specifier
12287 = cp_parser_storage_class_specifier_opt (parser
);
12288 if (!extension_specifier
)
12289 extension_specifier
12290 = cp_parser_function_specifier_opt (parser
,
12291 /*decl_specs=*/NULL
);
12294 /* Look for the `template' keyword. */
12295 cp_parser_require_keyword (parser
, RID_TEMPLATE
, RT_TEMPLATE
);
12296 /* Let the front end know that we are processing an explicit
12298 begin_explicit_instantiation ();
12299 /* [temp.explicit] says that we are supposed to ignore access
12300 control while processing explicit instantiation directives. */
12301 push_deferring_access_checks (dk_no_check
);
12302 /* Parse a decl-specifier-seq. */
12303 cp_parser_decl_specifier_seq (parser
,
12304 CP_PARSER_FLAGS_OPTIONAL
,
12306 &declares_class_or_enum
);
12307 /* If there was exactly one decl-specifier, and it declared a class,
12308 and there's no declarator, then we have an explicit type
12310 if (declares_class_or_enum
&& cp_parser_declares_only_class_p (parser
))
12314 type
= check_tag_decl (&decl_specifiers
);
12315 /* Turn access control back on for names used during
12316 template instantiation. */
12317 pop_deferring_access_checks ();
12319 do_type_instantiation (type
, extension_specifier
,
12320 /*complain=*/tf_error
);
12324 cp_declarator
*declarator
;
12327 /* Parse the declarator. */
12329 = cp_parser_declarator (parser
, CP_PARSER_DECLARATOR_NAMED
,
12330 /*ctor_dtor_or_conv_p=*/NULL
,
12331 /*parenthesized_p=*/NULL
,
12332 /*member_p=*/false);
12333 if (declares_class_or_enum
& 2)
12334 cp_parser_check_for_definition_in_return_type (declarator
,
12335 decl_specifiers
.type
,
12336 decl_specifiers
.type_location
);
12337 if (declarator
!= cp_error_declarator
)
12339 if (decl_specifiers
.specs
[(int)ds_inline
])
12340 permerror (input_location
, "explicit instantiation shall not use"
12341 " %<inline%> specifier");
12342 if (decl_specifiers
.specs
[(int)ds_constexpr
])
12343 permerror (input_location
, "explicit instantiation shall not use"
12344 " %<constexpr%> specifier");
12346 decl
= grokdeclarator (declarator
, &decl_specifiers
,
12347 NORMAL
, 0, &decl_specifiers
.attributes
);
12348 /* Turn access control back on for names used during
12349 template instantiation. */
12350 pop_deferring_access_checks ();
12351 /* Do the explicit instantiation. */
12352 do_decl_instantiation (decl
, extension_specifier
);
12356 pop_deferring_access_checks ();
12357 /* Skip the body of the explicit instantiation. */
12358 cp_parser_skip_to_end_of_statement (parser
);
12361 /* We're done with the instantiation. */
12362 end_explicit_instantiation ();
12364 cp_parser_consume_semicolon_at_end_of_statement (parser
);
12367 /* Parse an explicit-specialization.
12369 explicit-specialization:
12370 template < > declaration
12372 Although the standard says `declaration', what it really means is:
12374 explicit-specialization:
12375 template <> decl-specifier [opt] init-declarator [opt] ;
12376 template <> function-definition
12377 template <> explicit-specialization
12378 template <> template-declaration */
12381 cp_parser_explicit_specialization (cp_parser
* parser
)
12383 bool need_lang_pop
;
12384 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
12386 /* Look for the `template' keyword. */
12387 cp_parser_require_keyword (parser
, RID_TEMPLATE
, RT_TEMPLATE
);
12388 /* Look for the `<'. */
12389 cp_parser_require (parser
, CPP_LESS
, RT_LESS
);
12390 /* Look for the `>'. */
12391 cp_parser_require (parser
, CPP_GREATER
, RT_GREATER
);
12392 /* We have processed another parameter list. */
12393 ++parser
->num_template_parameter_lists
;
12396 A template ... explicit specialization ... shall not have C
12398 if (current_lang_name
== lang_name_c
)
12400 error_at (token
->location
, "template specialization with C linkage");
12401 /* Give it C++ linkage to avoid confusing other parts of the
12403 push_lang_context (lang_name_cplusplus
);
12404 need_lang_pop
= true;
12407 need_lang_pop
= false;
12408 /* Let the front end know that we are beginning a specialization. */
12409 if (!begin_specialization ())
12411 end_specialization ();
12415 /* If the next keyword is `template', we need to figure out whether
12416 or not we're looking a template-declaration. */
12417 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_TEMPLATE
))
12419 if (cp_lexer_peek_nth_token (parser
->lexer
, 2)->type
== CPP_LESS
12420 && cp_lexer_peek_nth_token (parser
->lexer
, 3)->type
!= CPP_GREATER
)
12421 cp_parser_template_declaration_after_export (parser
,
12422 /*member_p=*/false);
12424 cp_parser_explicit_specialization (parser
);
12427 /* Parse the dependent declaration. */
12428 cp_parser_single_declaration (parser
,
12430 /*member_p=*/false,
12431 /*explicit_specialization_p=*/true,
12432 /*friend_p=*/NULL
);
12433 /* We're done with the specialization. */
12434 end_specialization ();
12435 /* For the erroneous case of a template with C linkage, we pushed an
12436 implicit C++ linkage scope; exit that scope now. */
12438 pop_lang_context ();
12439 /* We're done with this parameter list. */
12440 --parser
->num_template_parameter_lists
;
12443 /* Parse a type-specifier.
12446 simple-type-specifier
12449 elaborated-type-specifier
12457 Returns a representation of the type-specifier. For a
12458 class-specifier, enum-specifier, or elaborated-type-specifier, a
12459 TREE_TYPE is returned; otherwise, a TYPE_DECL is returned.
12461 The parser flags FLAGS is used to control type-specifier parsing.
12463 If IS_DECLARATION is TRUE, then this type-specifier is appearing
12464 in a decl-specifier-seq.
12466 If DECLARES_CLASS_OR_ENUM is non-NULL, and the type-specifier is a
12467 class-specifier, enum-specifier, or elaborated-type-specifier, then
12468 *DECLARES_CLASS_OR_ENUM is set to a nonzero value. The value is 1
12469 if a type is declared; 2 if it is defined. Otherwise, it is set to
12472 If IS_CV_QUALIFIER is non-NULL, and the type-specifier is a
12473 cv-qualifier, then IS_CV_QUALIFIER is set to TRUE. Otherwise, it
12474 is set to FALSE. */
12477 cp_parser_type_specifier (cp_parser
* parser
,
12478 cp_parser_flags flags
,
12479 cp_decl_specifier_seq
*decl_specs
,
12480 bool is_declaration
,
12481 int* declares_class_or_enum
,
12482 bool* is_cv_qualifier
)
12484 tree type_spec
= NULL_TREE
;
12487 cp_decl_spec ds
= ds_last
;
12489 /* Assume this type-specifier does not declare a new type. */
12490 if (declares_class_or_enum
)
12491 *declares_class_or_enum
= 0;
12492 /* And that it does not specify a cv-qualifier. */
12493 if (is_cv_qualifier
)
12494 *is_cv_qualifier
= false;
12495 /* Peek at the next token. */
12496 token
= cp_lexer_peek_token (parser
->lexer
);
12498 /* If we're looking at a keyword, we can use that to guide the
12499 production we choose. */
12500 keyword
= token
->keyword
;
12504 if ((flags
& CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS
))
12505 goto elaborated_type_specifier
;
12507 /* Look for the enum-specifier. */
12508 type_spec
= cp_parser_enum_specifier (parser
);
12509 /* If that worked, we're done. */
12512 if (declares_class_or_enum
)
12513 *declares_class_or_enum
= 2;
12515 cp_parser_set_decl_spec_type (decl_specs
,
12518 /*user_defined_p=*/true);
12522 goto elaborated_type_specifier
;
12524 /* Any of these indicate either a class-specifier, or an
12525 elaborated-type-specifier. */
12529 if ((flags
& CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS
))
12530 goto elaborated_type_specifier
;
12532 /* Parse tentatively so that we can back up if we don't find a
12533 class-specifier. */
12534 cp_parser_parse_tentatively (parser
);
12535 /* Look for the class-specifier. */
12536 type_spec
= cp_parser_class_specifier (parser
);
12537 invoke_plugin_callbacks (PLUGIN_FINISH_TYPE
, type_spec
);
12538 /* If that worked, we're done. */
12539 if (cp_parser_parse_definitely (parser
))
12541 if (declares_class_or_enum
)
12542 *declares_class_or_enum
= 2;
12544 cp_parser_set_decl_spec_type (decl_specs
,
12547 /*user_defined_p=*/true);
12551 /* Fall through. */
12552 elaborated_type_specifier
:
12553 /* We're declaring (not defining) a class or enum. */
12554 if (declares_class_or_enum
)
12555 *declares_class_or_enum
= 1;
12557 /* Fall through. */
12559 /* Look for an elaborated-type-specifier. */
12561 = (cp_parser_elaborated_type_specifier
12563 decl_specs
&& decl_specs
->specs
[(int) ds_friend
],
12566 cp_parser_set_decl_spec_type (decl_specs
,
12569 /*user_defined_p=*/true);
12574 if (is_cv_qualifier
)
12575 *is_cv_qualifier
= true;
12580 if (is_cv_qualifier
)
12581 *is_cv_qualifier
= true;
12586 if (is_cv_qualifier
)
12587 *is_cv_qualifier
= true;
12591 /* The `__complex__' keyword is a GNU extension. */
12599 /* Handle simple keywords. */
12604 ++decl_specs
->specs
[(int)ds
];
12605 decl_specs
->any_specifiers_p
= true;
12607 return cp_lexer_consume_token (parser
->lexer
)->u
.value
;
12610 /* If we do not already have a type-specifier, assume we are looking
12611 at a simple-type-specifier. */
12612 type_spec
= cp_parser_simple_type_specifier (parser
,
12616 /* If we didn't find a type-specifier, and a type-specifier was not
12617 optional in this context, issue an error message. */
12618 if (!type_spec
&& !(flags
& CP_PARSER_FLAGS_OPTIONAL
))
12620 cp_parser_error (parser
, "expected type specifier");
12621 return error_mark_node
;
12627 /* Parse a simple-type-specifier.
12629 simple-type-specifier:
12630 :: [opt] nested-name-specifier [opt] type-name
12631 :: [opt] nested-name-specifier template template-id
12646 simple-type-specifier:
12648 decltype ( expression )
12654 simple-type-specifier:
12656 __typeof__ unary-expression
12657 __typeof__ ( type-id )
12659 Returns the indicated TYPE_DECL. If DECL_SPECS is not NULL, it is
12660 appropriately updated. */
12663 cp_parser_simple_type_specifier (cp_parser
* parser
,
12664 cp_decl_specifier_seq
*decl_specs
,
12665 cp_parser_flags flags
)
12667 tree type
= NULL_TREE
;
12670 /* Peek at the next token. */
12671 token
= cp_lexer_peek_token (parser
->lexer
);
12673 /* If we're looking at a keyword, things are easy. */
12674 switch (token
->keyword
)
12678 decl_specs
->explicit_char_p
= true;
12679 type
= char_type_node
;
12682 type
= char16_type_node
;
12685 type
= char32_type_node
;
12688 type
= wchar_type_node
;
12691 type
= boolean_type_node
;
12695 ++decl_specs
->specs
[(int) ds_short
];
12696 type
= short_integer_type_node
;
12700 decl_specs
->explicit_int_p
= true;
12701 type
= integer_type_node
;
12704 if (!int128_integer_type_node
)
12707 decl_specs
->explicit_int128_p
= true;
12708 type
= int128_integer_type_node
;
12712 ++decl_specs
->specs
[(int) ds_long
];
12713 type
= long_integer_type_node
;
12717 ++decl_specs
->specs
[(int) ds_signed
];
12718 type
= integer_type_node
;
12722 ++decl_specs
->specs
[(int) ds_unsigned
];
12723 type
= unsigned_type_node
;
12726 type
= float_type_node
;
12729 type
= double_type_node
;
12732 type
= void_type_node
;
12736 maybe_warn_cpp0x (CPP0X_AUTO
);
12737 type
= make_auto ();
12741 /* Parse the `decltype' type. */
12742 type
= cp_parser_decltype (parser
);
12745 cp_parser_set_decl_spec_type (decl_specs
, type
,
12747 /*user_defined_p=*/true);
12752 /* Consume the `typeof' token. */
12753 cp_lexer_consume_token (parser
->lexer
);
12754 /* Parse the operand to `typeof'. */
12755 type
= cp_parser_sizeof_operand (parser
, RID_TYPEOF
);
12756 /* If it is not already a TYPE, take its type. */
12757 if (!TYPE_P (type
))
12758 type
= finish_typeof (type
);
12761 cp_parser_set_decl_spec_type (decl_specs
, type
,
12763 /*user_defined_p=*/true);
12771 /* If the type-specifier was for a built-in type, we're done. */
12774 /* Record the type. */
12776 && (token
->keyword
!= RID_SIGNED
12777 && token
->keyword
!= RID_UNSIGNED
12778 && token
->keyword
!= RID_SHORT
12779 && token
->keyword
!= RID_LONG
))
12780 cp_parser_set_decl_spec_type (decl_specs
,
12783 /*user_defined=*/false);
12785 decl_specs
->any_specifiers_p
= true;
12787 /* Consume the token. */
12788 cp_lexer_consume_token (parser
->lexer
);
12790 /* There is no valid C++ program where a non-template type is
12791 followed by a "<". That usually indicates that the user thought
12792 that the type was a template. */
12793 cp_parser_check_for_invalid_template_id (parser
, type
, token
->location
);
12795 return TYPE_NAME (type
);
12798 /* The type-specifier must be a user-defined type. */
12799 if (!(flags
& CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES
))
12804 /* Don't gobble tokens or issue error messages if this is an
12805 optional type-specifier. */
12806 if (flags
& CP_PARSER_FLAGS_OPTIONAL
)
12807 cp_parser_parse_tentatively (parser
);
12809 /* Look for the optional `::' operator. */
12811 = (cp_parser_global_scope_opt (parser
,
12812 /*current_scope_valid_p=*/false)
12814 /* Look for the nested-name specifier. */
12816 = (cp_parser_nested_name_specifier_opt (parser
,
12817 /*typename_keyword_p=*/false,
12818 /*check_dependency_p=*/true,
12820 /*is_declaration=*/false)
12822 token
= cp_lexer_peek_token (parser
->lexer
);
12823 /* If we have seen a nested-name-specifier, and the next token
12824 is `template', then we are using the template-id production. */
12826 && cp_parser_optional_template_keyword (parser
))
12828 /* Look for the template-id. */
12829 type
= cp_parser_template_id (parser
,
12830 /*template_keyword_p=*/true,
12831 /*check_dependency_p=*/true,
12832 /*is_declaration=*/false);
12833 /* If the template-id did not name a type, we are out of
12835 if (TREE_CODE (type
) != TYPE_DECL
)
12837 cp_parser_error (parser
, "expected template-id for type");
12841 /* Otherwise, look for a type-name. */
12843 type
= cp_parser_type_name (parser
);
12844 /* Keep track of all name-lookups performed in class scopes. */
12848 && TREE_CODE (type
) == TYPE_DECL
12849 && TREE_CODE (DECL_NAME (type
)) == IDENTIFIER_NODE
)
12850 maybe_note_name_used_in_class (DECL_NAME (type
), type
);
12851 /* If it didn't work out, we don't have a TYPE. */
12852 if ((flags
& CP_PARSER_FLAGS_OPTIONAL
)
12853 && !cp_parser_parse_definitely (parser
))
12855 if (type
&& decl_specs
)
12856 cp_parser_set_decl_spec_type (decl_specs
, type
,
12858 /*user_defined=*/true);
12861 /* If we didn't get a type-name, issue an error message. */
12862 if (!type
&& !(flags
& CP_PARSER_FLAGS_OPTIONAL
))
12864 cp_parser_error (parser
, "expected type-name");
12865 return error_mark_node
;
12868 if (type
&& type
!= error_mark_node
)
12870 /* See if TYPE is an Objective-C type, and if so, parse and
12871 accept any protocol references following it. Do this before
12872 the cp_parser_check_for_invalid_template_id() call, because
12873 Objective-C types can be followed by '<...>' which would
12874 enclose protocol names rather than template arguments, and so
12875 everything is fine. */
12876 if (c_dialect_objc () && !parser
->scope
12877 && (objc_is_id (type
) || objc_is_class_name (type
)))
12879 tree protos
= cp_parser_objc_protocol_refs_opt (parser
);
12880 tree qual_type
= objc_get_protocol_qualified_type (type
, protos
);
12882 /* Clobber the "unqualified" type previously entered into
12883 DECL_SPECS with the new, improved protocol-qualified version. */
12885 decl_specs
->type
= qual_type
;
12890 /* There is no valid C++ program where a non-template type is
12891 followed by a "<". That usually indicates that the user
12892 thought that the type was a template. */
12893 cp_parser_check_for_invalid_template_id (parser
, TREE_TYPE (type
),
12900 /* Parse a type-name.
12913 Returns a TYPE_DECL for the type. */
12916 cp_parser_type_name (cp_parser
* parser
)
12920 /* We can't know yet whether it is a class-name or not. */
12921 cp_parser_parse_tentatively (parser
);
12922 /* Try a class-name. */
12923 type_decl
= cp_parser_class_name (parser
,
12924 /*typename_keyword_p=*/false,
12925 /*template_keyword_p=*/false,
12927 /*check_dependency_p=*/true,
12928 /*class_head_p=*/false,
12929 /*is_declaration=*/false);
12930 /* If it's not a class-name, keep looking. */
12931 if (!cp_parser_parse_definitely (parser
))
12933 /* It must be a typedef-name or an enum-name. */
12934 return cp_parser_nonclass_name (parser
);
12940 /* Parse a non-class type-name, that is, either an enum-name or a typedef-name.
12948 Returns a TYPE_DECL for the type. */
12951 cp_parser_nonclass_name (cp_parser
* parser
)
12956 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
12957 identifier
= cp_parser_identifier (parser
);
12958 if (identifier
== error_mark_node
)
12959 return error_mark_node
;
12961 /* Look up the type-name. */
12962 type_decl
= cp_parser_lookup_name_simple (parser
, identifier
, token
->location
);
12964 if (TREE_CODE (type_decl
) != TYPE_DECL
12965 && (objc_is_id (identifier
) || objc_is_class_name (identifier
)))
12967 /* See if this is an Objective-C type. */
12968 tree protos
= cp_parser_objc_protocol_refs_opt (parser
);
12969 tree type
= objc_get_protocol_qualified_type (identifier
, protos
);
12971 type_decl
= TYPE_NAME (type
);
12974 /* Issue an error if we did not find a type-name. */
12975 if (TREE_CODE (type_decl
) != TYPE_DECL
12976 /* In Objective-C, we have the complication that class names are
12977 normally type names and start declarations (eg, the
12978 "NSObject" in "NSObject *object;"), but can be used in an
12979 Objective-C 2.0 dot-syntax (as in "NSObject.version") which
12980 is an expression. So, a classname followed by a dot is not a
12981 valid type-name. */
12982 || (objc_is_class_name (TREE_TYPE (type_decl
))
12983 && cp_lexer_peek_token (parser
->lexer
)->type
== CPP_DOT
))
12985 if (!cp_parser_simulate_error (parser
))
12986 cp_parser_name_lookup_error (parser
, identifier
, type_decl
,
12987 NLE_TYPE
, token
->location
);
12988 return error_mark_node
;
12990 /* Remember that the name was used in the definition of the
12991 current class so that we can check later to see if the
12992 meaning would have been different after the class was
12993 entirely defined. */
12994 else if (type_decl
!= error_mark_node
12996 maybe_note_name_used_in_class (identifier
, type_decl
);
13001 /* Parse an elaborated-type-specifier. Note that the grammar given
13002 here incorporates the resolution to DR68.
13004 elaborated-type-specifier:
13005 class-key :: [opt] nested-name-specifier [opt] identifier
13006 class-key :: [opt] nested-name-specifier [opt] template [opt] template-id
13007 enum-key :: [opt] nested-name-specifier [opt] identifier
13008 typename :: [opt] nested-name-specifier identifier
13009 typename :: [opt] nested-name-specifier template [opt]
13014 elaborated-type-specifier:
13015 class-key attributes :: [opt] nested-name-specifier [opt] identifier
13016 class-key attributes :: [opt] nested-name-specifier [opt]
13017 template [opt] template-id
13018 enum attributes :: [opt] nested-name-specifier [opt] identifier
13020 If IS_FRIEND is TRUE, then this elaborated-type-specifier is being
13021 declared `friend'. If IS_DECLARATION is TRUE, then this
13022 elaborated-type-specifier appears in a decl-specifiers-seq, i.e.,
13023 something is being declared.
13025 Returns the TYPE specified. */
13028 cp_parser_elaborated_type_specifier (cp_parser
* parser
,
13030 bool is_declaration
)
13032 enum tag_types tag_type
;
13034 tree type
= NULL_TREE
;
13035 tree attributes
= NULL_TREE
;
13037 cp_token
*token
= NULL
;
13039 /* See if we're looking at the `enum' keyword. */
13040 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_ENUM
))
13042 /* Consume the `enum' token. */
13043 cp_lexer_consume_token (parser
->lexer
);
13044 /* Remember that it's an enumeration type. */
13045 tag_type
= enum_type
;
13046 /* Issue a warning if the `struct' or `class' key (for C++0x scoped
13047 enums) is used here. */
13048 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_CLASS
)
13049 || cp_lexer_next_token_is_keyword (parser
->lexer
, RID_STRUCT
))
13051 pedwarn (input_location
, 0, "elaborated-type-specifier "
13052 "for a scoped enum must not use the %<%D%> keyword",
13053 cp_lexer_peek_token (parser
->lexer
)->u
.value
);
13054 /* Consume the `struct' or `class' and parse it anyway. */
13055 cp_lexer_consume_token (parser
->lexer
);
13057 /* Parse the attributes. */
13058 attributes
= cp_parser_attributes_opt (parser
);
13060 /* Or, it might be `typename'. */
13061 else if (cp_lexer_next_token_is_keyword (parser
->lexer
,
13064 /* Consume the `typename' token. */
13065 cp_lexer_consume_token (parser
->lexer
);
13066 /* Remember that it's a `typename' type. */
13067 tag_type
= typename_type
;
13069 /* Otherwise it must be a class-key. */
13072 tag_type
= cp_parser_class_key (parser
);
13073 if (tag_type
== none_type
)
13074 return error_mark_node
;
13075 /* Parse the attributes. */
13076 attributes
= cp_parser_attributes_opt (parser
);
13079 /* Look for the `::' operator. */
13080 globalscope
= cp_parser_global_scope_opt (parser
,
13081 /*current_scope_valid_p=*/false);
13082 /* Look for the nested-name-specifier. */
13083 if (tag_type
== typename_type
&& !globalscope
)
13085 if (!cp_parser_nested_name_specifier (parser
,
13086 /*typename_keyword_p=*/true,
13087 /*check_dependency_p=*/true,
13090 return error_mark_node
;
13093 /* Even though `typename' is not present, the proposed resolution
13094 to Core Issue 180 says that in `class A<T>::B', `B' should be
13095 considered a type-name, even if `A<T>' is dependent. */
13096 cp_parser_nested_name_specifier_opt (parser
,
13097 /*typename_keyword_p=*/true,
13098 /*check_dependency_p=*/true,
13101 /* For everything but enumeration types, consider a template-id.
13102 For an enumeration type, consider only a plain identifier. */
13103 if (tag_type
!= enum_type
)
13105 bool template_p
= false;
13108 /* Allow the `template' keyword. */
13109 template_p
= cp_parser_optional_template_keyword (parser
);
13110 /* If we didn't see `template', we don't know if there's a
13111 template-id or not. */
13113 cp_parser_parse_tentatively (parser
);
13114 /* Parse the template-id. */
13115 token
= cp_lexer_peek_token (parser
->lexer
);
13116 decl
= cp_parser_template_id (parser
, template_p
,
13117 /*check_dependency_p=*/true,
13119 /* If we didn't find a template-id, look for an ordinary
13121 if (!template_p
&& !cp_parser_parse_definitely (parser
))
13123 /* If DECL is a TEMPLATE_ID_EXPR, and the `typename' keyword is
13124 in effect, then we must assume that, upon instantiation, the
13125 template will correspond to a class. */
13126 else if (TREE_CODE (decl
) == TEMPLATE_ID_EXPR
13127 && tag_type
== typename_type
)
13128 type
= make_typename_type (parser
->scope
, decl
,
13130 /*complain=*/tf_error
);
13131 /* If the `typename' keyword is in effect and DECL is not a type
13132 decl. Then type is non existant. */
13133 else if (tag_type
== typename_type
&& TREE_CODE (decl
) != TYPE_DECL
)
13136 type
= TREE_TYPE (decl
);
13141 token
= cp_lexer_peek_token (parser
->lexer
);
13142 identifier
= cp_parser_identifier (parser
);
13144 if (identifier
== error_mark_node
)
13146 parser
->scope
= NULL_TREE
;
13147 return error_mark_node
;
13150 /* For a `typename', we needn't call xref_tag. */
13151 if (tag_type
== typename_type
13152 && TREE_CODE (parser
->scope
) != NAMESPACE_DECL
)
13153 return cp_parser_make_typename_type (parser
, parser
->scope
,
13156 /* Look up a qualified name in the usual way. */
13160 tree ambiguous_decls
;
13162 decl
= cp_parser_lookup_name (parser
, identifier
,
13164 /*is_template=*/false,
13165 /*is_namespace=*/false,
13166 /*check_dependency=*/true,
13170 /* If the lookup was ambiguous, an error will already have been
13172 if (ambiguous_decls
)
13173 return error_mark_node
;
13175 /* If we are parsing friend declaration, DECL may be a
13176 TEMPLATE_DECL tree node here. However, we need to check
13177 whether this TEMPLATE_DECL results in valid code. Consider
13178 the following example:
13181 template <class T> class C {};
13184 template <class T> friend class N::C; // #1, valid code
13186 template <class T> class Y {
13187 friend class N::C; // #2, invalid code
13190 For both case #1 and #2, we arrive at a TEMPLATE_DECL after
13191 name lookup of `N::C'. We see that friend declaration must
13192 be template for the code to be valid. Note that
13193 processing_template_decl does not work here since it is
13194 always 1 for the above two cases. */
13196 decl
= (cp_parser_maybe_treat_template_as_class
13197 (decl
, /*tag_name_p=*/is_friend
13198 && parser
->num_template_parameter_lists
));
13200 if (TREE_CODE (decl
) != TYPE_DECL
)
13202 cp_parser_diagnose_invalid_type_name (parser
,
13206 return error_mark_node
;
13209 if (TREE_CODE (TREE_TYPE (decl
)) != TYPENAME_TYPE
)
13211 bool allow_template
= (parser
->num_template_parameter_lists
13212 || DECL_SELF_REFERENCE_P (decl
));
13213 type
= check_elaborated_type_specifier (tag_type
, decl
,
13216 if (type
== error_mark_node
)
13217 return error_mark_node
;
13220 /* Forward declarations of nested types, such as
13225 are invalid unless all components preceding the final '::'
13226 are complete. If all enclosing types are complete, these
13227 declarations become merely pointless.
13229 Invalid forward declarations of nested types are errors
13230 caught elsewhere in parsing. Those that are pointless arrive
13233 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
)
13234 && !is_friend
&& !processing_explicit_instantiation
)
13235 warning (0, "declaration %qD does not declare anything", decl
);
13237 type
= TREE_TYPE (decl
);
13241 /* An elaborated-type-specifier sometimes introduces a new type and
13242 sometimes names an existing type. Normally, the rule is that it
13243 introduces a new type only if there is not an existing type of
13244 the same name already in scope. For example, given:
13247 void f() { struct S s; }
13249 the `struct S' in the body of `f' is the same `struct S' as in
13250 the global scope; the existing definition is used. However, if
13251 there were no global declaration, this would introduce a new
13252 local class named `S'.
13254 An exception to this rule applies to the following code:
13256 namespace N { struct S; }
13258 Here, the elaborated-type-specifier names a new type
13259 unconditionally; even if there is already an `S' in the
13260 containing scope this declaration names a new type.
13261 This exception only applies if the elaborated-type-specifier
13262 forms the complete declaration:
13266 A declaration consisting solely of `class-key identifier ;' is
13267 either a redeclaration of the name in the current scope or a
13268 forward declaration of the identifier as a class name. It
13269 introduces the name into the current scope.
13271 We are in this situation precisely when the next token is a `;'.
13273 An exception to the exception is that a `friend' declaration does
13274 *not* name a new type; i.e., given:
13276 struct S { friend struct T; };
13278 `T' is not a new type in the scope of `S'.
13280 Also, `new struct S' or `sizeof (struct S)' never results in the
13281 definition of a new type; a new type can only be declared in a
13282 declaration context. */
13288 /* Friends have special name lookup rules. */
13289 ts
= ts_within_enclosing_non_class
;
13290 else if (is_declaration
13291 && cp_lexer_next_token_is (parser
->lexer
,
13293 /* This is a `class-key identifier ;' */
13299 (parser
->num_template_parameter_lists
13300 && (cp_parser_next_token_starts_class_definition_p (parser
)
13301 || cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
)));
13302 /* An unqualified name was used to reference this type, so
13303 there were no qualifying templates. */
13304 if (!cp_parser_check_template_parameters (parser
,
13305 /*num_templates=*/0,
13307 /*declarator=*/NULL
))
13308 return error_mark_node
;
13309 type
= xref_tag (tag_type
, identifier
, ts
, template_p
);
13313 if (type
== error_mark_node
)
13314 return error_mark_node
;
13316 /* Allow attributes on forward declarations of classes. */
13319 if (TREE_CODE (type
) == TYPENAME_TYPE
)
13320 warning (OPT_Wattributes
,
13321 "attributes ignored on uninstantiated type");
13322 else if (tag_type
!= enum_type
&& CLASSTYPE_TEMPLATE_INSTANTIATION (type
)
13323 && ! processing_explicit_instantiation
)
13324 warning (OPT_Wattributes
,
13325 "attributes ignored on template instantiation");
13326 else if (is_declaration
&& cp_parser_declares_only_class_p (parser
))
13327 cplus_decl_attributes (&type
, attributes
, (int) ATTR_FLAG_TYPE_IN_PLACE
);
13329 warning (OPT_Wattributes
,
13330 "attributes ignored on elaborated-type-specifier that is not a forward declaration");
13333 if (tag_type
!= enum_type
)
13334 cp_parser_check_class_key (tag_type
, type
);
13336 /* A "<" cannot follow an elaborated type specifier. If that
13337 happens, the user was probably trying to form a template-id. */
13338 cp_parser_check_for_invalid_template_id (parser
, type
, token
->location
);
13343 /* Parse an enum-specifier.
13346 enum-head { enumerator-list [opt] }
13349 enum-key identifier [opt] enum-base [opt]
13350 enum-key nested-name-specifier identifier enum-base [opt]
13355 enum struct [C++0x]
13358 : type-specifier-seq
13360 opaque-enum-specifier:
13361 enum-key identifier enum-base [opt] ;
13364 enum-key attributes[opt] identifier [opt] enum-base [opt]
13365 { enumerator-list [opt] }attributes[opt]
13367 Returns an ENUM_TYPE representing the enumeration, or NULL_TREE
13368 if the token stream isn't an enum-specifier after all. */
13371 cp_parser_enum_specifier (cp_parser
* parser
)
13374 tree type
= NULL_TREE
;
13376 tree nested_name_specifier
= NULL_TREE
;
13378 bool scoped_enum_p
= false;
13379 bool has_underlying_type
= false;
13380 bool nested_being_defined
= false;
13381 bool new_value_list
= false;
13382 bool is_new_type
= false;
13383 bool is_anonymous
= false;
13384 tree underlying_type
= NULL_TREE
;
13385 cp_token
*type_start_token
= NULL
;
13386 bool saved_colon_corrects_to_scope_p
= parser
->colon_corrects_to_scope_p
;
13388 parser
->colon_corrects_to_scope_p
= false;
13390 /* Parse tentatively so that we can back up if we don't find a
13392 cp_parser_parse_tentatively (parser
);
13394 /* Caller guarantees that the current token is 'enum', an identifier
13395 possibly follows, and the token after that is an opening brace.
13396 If we don't have an identifier, fabricate an anonymous name for
13397 the enumeration being defined. */
13398 cp_lexer_consume_token (parser
->lexer
);
13400 /* Parse the "class" or "struct", which indicates a scoped
13401 enumeration type in C++0x. */
13402 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_CLASS
)
13403 || cp_lexer_next_token_is_keyword (parser
->lexer
, RID_STRUCT
))
13405 if (cxx_dialect
< cxx0x
)
13406 maybe_warn_cpp0x (CPP0X_SCOPED_ENUMS
);
13408 /* Consume the `struct' or `class' token. */
13409 cp_lexer_consume_token (parser
->lexer
);
13411 scoped_enum_p
= true;
13414 attributes
= cp_parser_attributes_opt (parser
);
13416 /* Clear the qualification. */
13417 parser
->scope
= NULL_TREE
;
13418 parser
->qualifying_scope
= NULL_TREE
;
13419 parser
->object_scope
= NULL_TREE
;
13421 /* Figure out in what scope the declaration is being placed. */
13422 prev_scope
= current_scope ();
13424 type_start_token
= cp_lexer_peek_token (parser
->lexer
);
13426 push_deferring_access_checks (dk_no_check
);
13427 nested_name_specifier
13428 = cp_parser_nested_name_specifier_opt (parser
,
13429 /*typename_keyword_p=*/true,
13430 /*check_dependency_p=*/false,
13432 /*is_declaration=*/false);
13434 if (nested_name_specifier
)
13438 identifier
= cp_parser_identifier (parser
);
13439 name
= cp_parser_lookup_name (parser
, identifier
,
13441 /*is_template=*/false,
13442 /*is_namespace=*/false,
13443 /*check_dependency=*/true,
13444 /*ambiguous_decls=*/NULL
,
13448 type
= TREE_TYPE (name
);
13449 if (TREE_CODE (type
) == TYPENAME_TYPE
)
13451 /* Are template enums allowed in ISO? */
13452 if (template_parm_scope_p ())
13453 pedwarn (type_start_token
->location
, OPT_pedantic
,
13454 "%qD is an enumeration template", name
);
13455 /* ignore a typename reference, for it will be solved by name
13461 error_at (type_start_token
->location
,
13462 "%qD is not an enumerator-name", identifier
);
13466 if (cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
))
13467 identifier
= cp_parser_identifier (parser
);
13470 identifier
= make_anon_name ();
13471 is_anonymous
= true;
13474 pop_deferring_access_checks ();
13476 /* Check for the `:' that denotes a specified underlying type in C++0x.
13477 Note that a ':' could also indicate a bitfield width, however. */
13478 if (cp_lexer_next_token_is (parser
->lexer
, CPP_COLON
))
13480 cp_decl_specifier_seq type_specifiers
;
13482 /* Consume the `:'. */
13483 cp_lexer_consume_token (parser
->lexer
);
13485 /* Parse the type-specifier-seq. */
13486 cp_parser_type_specifier_seq (parser
, /*is_declaration=*/false,
13487 /*is_trailing_return=*/false,
13490 /* At this point this is surely not elaborated type specifier. */
13491 if (!cp_parser_parse_definitely (parser
))
13494 if (cxx_dialect
< cxx0x
)
13495 maybe_warn_cpp0x (CPP0X_SCOPED_ENUMS
);
13497 has_underlying_type
= true;
13499 /* If that didn't work, stop. */
13500 if (type_specifiers
.type
!= error_mark_node
)
13502 underlying_type
= grokdeclarator (NULL
, &type_specifiers
, TYPENAME
,
13503 /*initialized=*/0, NULL
);
13504 if (underlying_type
== error_mark_node
)
13505 underlying_type
= NULL_TREE
;
13509 /* Look for the `{' but don't consume it yet. */
13510 if (!cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
13512 if (cxx_dialect
< cxx0x
|| (!scoped_enum_p
&& !underlying_type
))
13514 cp_parser_error (parser
, "expected %<{%>");
13515 if (has_underlying_type
)
13521 /* An opaque-enum-specifier must have a ';' here. */
13522 if ((scoped_enum_p
|| underlying_type
)
13523 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
13525 cp_parser_error (parser
, "expected %<;%> or %<{%>");
13526 if (has_underlying_type
)
13534 if (!has_underlying_type
&& !cp_parser_parse_definitely (parser
))
13537 if (nested_name_specifier
)
13539 if (CLASS_TYPE_P (nested_name_specifier
))
13541 nested_being_defined
= TYPE_BEING_DEFINED (nested_name_specifier
);
13542 TYPE_BEING_DEFINED (nested_name_specifier
) = 1;
13543 push_scope (nested_name_specifier
);
13545 else if (TREE_CODE (nested_name_specifier
) == NAMESPACE_DECL
)
13547 push_nested_namespace (nested_name_specifier
);
13551 /* Issue an error message if type-definitions are forbidden here. */
13552 if (!cp_parser_check_type_definition (parser
))
13553 type
= error_mark_node
;
13555 /* Create the new type. We do this before consuming the opening
13556 brace so the enum will be recorded as being on the line of its
13557 tag (or the 'enum' keyword, if there is no tag). */
13558 type
= start_enum (identifier
, type
, underlying_type
,
13559 scoped_enum_p
, &is_new_type
);
13561 /* If the next token is not '{' it is an opaque-enum-specifier or an
13562 elaborated-type-specifier. */
13563 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
13565 if (nested_name_specifier
)
13567 /* The following catches invalid code such as:
13568 enum class S<int>::E { A, B, C }; */
13569 if (!processing_specialization
13570 && CLASS_TYPE_P (nested_name_specifier
)
13571 && CLASSTYPE_USE_TEMPLATE (nested_name_specifier
))
13572 error_at (type_start_token
->location
, "cannot add an enumerator "
13573 "list to a template instantiation");
13575 /* If that scope does not contain the scope in which the
13576 class was originally declared, the program is invalid. */
13577 if (prev_scope
&& !is_ancestor (prev_scope
, nested_name_specifier
))
13579 if (at_namespace_scope_p ())
13580 error_at (type_start_token
->location
,
13581 "declaration of %qD in namespace %qD which does not "
13583 type
, prev_scope
, nested_name_specifier
);
13585 error_at (type_start_token
->location
,
13586 "declaration of %qD in %qD which does not enclose %qD",
13587 type
, prev_scope
, nested_name_specifier
);
13588 type
= error_mark_node
;
13593 begin_scope (sk_scoped_enum
, type
);
13595 /* Consume the opening brace. */
13596 cp_lexer_consume_token (parser
->lexer
);
13598 if (type
== error_mark_node
)
13599 ; /* Nothing to add */
13600 else if (OPAQUE_ENUM_P (type
)
13601 || (cxx_dialect
> cxx98
&& processing_specialization
))
13603 new_value_list
= true;
13604 SET_OPAQUE_ENUM_P (type
, false);
13605 DECL_SOURCE_LOCATION (TYPE_NAME (type
)) = type_start_token
->location
;
13609 error_at (type_start_token
->location
, "multiple definition of %q#T", type
);
13610 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
13611 "previous definition here");
13612 type
= error_mark_node
;
13615 if (type
== error_mark_node
)
13616 cp_parser_skip_to_end_of_block_or_statement (parser
);
13617 /* If the next token is not '}', then there are some enumerators. */
13618 else if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_CLOSE_BRACE
))
13619 cp_parser_enumerator_list (parser
, type
);
13621 /* Consume the final '}'. */
13622 cp_parser_require (parser
, CPP_CLOSE_BRACE
, RT_CLOSE_BRACE
);
13629 /* If a ';' follows, then it is an opaque-enum-specifier
13630 and additional restrictions apply. */
13631 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
13634 error_at (type_start_token
->location
,
13635 "opaque-enum-specifier without name");
13636 else if (nested_name_specifier
)
13637 error_at (type_start_token
->location
,
13638 "opaque-enum-specifier must use a simple identifier");
13642 /* Look for trailing attributes to apply to this enumeration, and
13643 apply them if appropriate. */
13644 if (cp_parser_allow_gnu_extensions_p (parser
))
13646 tree trailing_attr
= cp_parser_attributes_opt (parser
);
13647 trailing_attr
= chainon (trailing_attr
, attributes
);
13648 cplus_decl_attributes (&type
,
13650 (int) ATTR_FLAG_TYPE_IN_PLACE
);
13653 /* Finish up the enumeration. */
13654 if (type
!= error_mark_node
)
13656 if (new_value_list
)
13657 finish_enum_value_list (type
);
13659 finish_enum (type
);
13662 if (nested_name_specifier
)
13664 if (CLASS_TYPE_P (nested_name_specifier
))
13666 TYPE_BEING_DEFINED (nested_name_specifier
) = nested_being_defined
;
13667 pop_scope (nested_name_specifier
);
13669 else if (TREE_CODE (nested_name_specifier
) == NAMESPACE_DECL
)
13671 pop_nested_namespace (nested_name_specifier
);
13675 parser
->colon_corrects_to_scope_p
= saved_colon_corrects_to_scope_p
;
13679 /* Parse an enumerator-list. The enumerators all have the indicated
13683 enumerator-definition
13684 enumerator-list , enumerator-definition */
13687 cp_parser_enumerator_list (cp_parser
* parser
, tree type
)
13691 /* Parse an enumerator-definition. */
13692 cp_parser_enumerator_definition (parser
, type
);
13694 /* If the next token is not a ',', we've reached the end of
13696 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COMMA
))
13698 /* Otherwise, consume the `,' and keep going. */
13699 cp_lexer_consume_token (parser
->lexer
);
13700 /* If the next token is a `}', there is a trailing comma. */
13701 if (cp_lexer_next_token_is (parser
->lexer
, CPP_CLOSE_BRACE
))
13703 if (!in_system_header
)
13704 pedwarn (input_location
, OPT_pedantic
, "comma at end of enumerator list");
13710 /* Parse an enumerator-definition. The enumerator has the indicated
13713 enumerator-definition:
13715 enumerator = constant-expression
13721 cp_parser_enumerator_definition (cp_parser
* parser
, tree type
)
13727 /* Save the input location because we are interested in the location
13728 of the identifier and not the location of the explicit value. */
13729 loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
13731 /* Look for the identifier. */
13732 identifier
= cp_parser_identifier (parser
);
13733 if (identifier
== error_mark_node
)
13736 /* If the next token is an '=', then there is an explicit value. */
13737 if (cp_lexer_next_token_is (parser
->lexer
, CPP_EQ
))
13739 /* Consume the `=' token. */
13740 cp_lexer_consume_token (parser
->lexer
);
13741 /* Parse the value. */
13742 value
= cp_parser_constant_expression (parser
,
13743 /*allow_non_constant_p=*/false,
13749 /* If we are processing a template, make sure the initializer of the
13750 enumerator doesn't contain any bare template parameter pack. */
13751 if (check_for_bare_parameter_packs (value
))
13752 value
= error_mark_node
;
13754 /* Create the enumerator. */
13755 build_enumerator (identifier
, value
, type
, loc
);
13758 /* Parse a namespace-name.
13761 original-namespace-name
13764 Returns the NAMESPACE_DECL for the namespace. */
13767 cp_parser_namespace_name (cp_parser
* parser
)
13770 tree namespace_decl
;
13772 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
13774 /* Get the name of the namespace. */
13775 identifier
= cp_parser_identifier (parser
);
13776 if (identifier
== error_mark_node
)
13777 return error_mark_node
;
13779 /* Look up the identifier in the currently active scope. Look only
13780 for namespaces, due to:
13782 [basic.lookup.udir]
13784 When looking up a namespace-name in a using-directive or alias
13785 definition, only namespace names are considered.
13789 [basic.lookup.qual]
13791 During the lookup of a name preceding the :: scope resolution
13792 operator, object, function, and enumerator names are ignored.
13794 (Note that cp_parser_qualifying_entity only calls this
13795 function if the token after the name is the scope resolution
13797 namespace_decl
= cp_parser_lookup_name (parser
, identifier
,
13799 /*is_template=*/false,
13800 /*is_namespace=*/true,
13801 /*check_dependency=*/true,
13802 /*ambiguous_decls=*/NULL
,
13804 /* If it's not a namespace, issue an error. */
13805 if (namespace_decl
== error_mark_node
13806 || TREE_CODE (namespace_decl
) != NAMESPACE_DECL
)
13808 if (!cp_parser_uncommitted_to_tentative_parse_p (parser
))
13809 error_at (token
->location
, "%qD is not a namespace-name", identifier
);
13810 cp_parser_error (parser
, "expected namespace-name");
13811 namespace_decl
= error_mark_node
;
13814 return namespace_decl
;
13817 /* Parse a namespace-definition.
13819 namespace-definition:
13820 named-namespace-definition
13821 unnamed-namespace-definition
13823 named-namespace-definition:
13824 original-namespace-definition
13825 extension-namespace-definition
13827 original-namespace-definition:
13828 namespace identifier { namespace-body }
13830 extension-namespace-definition:
13831 namespace original-namespace-name { namespace-body }
13833 unnamed-namespace-definition:
13834 namespace { namespace-body } */
13837 cp_parser_namespace_definition (cp_parser
* parser
)
13839 tree identifier
, attribs
;
13840 bool has_visibility
;
13843 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_INLINE
))
13845 maybe_warn_cpp0x (CPP0X_INLINE_NAMESPACES
);
13847 cp_lexer_consume_token (parser
->lexer
);
13852 /* Look for the `namespace' keyword. */
13853 cp_parser_require_keyword (parser
, RID_NAMESPACE
, RT_NAMESPACE
);
13855 /* Get the name of the namespace. We do not attempt to distinguish
13856 between an original-namespace-definition and an
13857 extension-namespace-definition at this point. The semantic
13858 analysis routines are responsible for that. */
13859 if (cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
))
13860 identifier
= cp_parser_identifier (parser
);
13862 identifier
= NULL_TREE
;
13864 /* Parse any specified attributes. */
13865 attribs
= cp_parser_attributes_opt (parser
);
13867 /* Look for the `{' to start the namespace. */
13868 cp_parser_require (parser
, CPP_OPEN_BRACE
, RT_OPEN_BRACE
);
13869 /* Start the namespace. */
13870 push_namespace (identifier
);
13872 /* "inline namespace" is equivalent to a stub namespace definition
13873 followed by a strong using directive. */
13876 tree name_space
= current_namespace
;
13877 /* Set up namespace association. */
13878 DECL_NAMESPACE_ASSOCIATIONS (name_space
)
13879 = tree_cons (CP_DECL_CONTEXT (name_space
), NULL_TREE
,
13880 DECL_NAMESPACE_ASSOCIATIONS (name_space
));
13881 /* Import the contents of the inline namespace. */
13883 do_using_directive (name_space
);
13884 push_namespace (identifier
);
13887 has_visibility
= handle_namespace_attrs (current_namespace
, attribs
);
13889 /* Parse the body of the namespace. */
13890 cp_parser_namespace_body (parser
);
13892 if (has_visibility
)
13893 pop_visibility (1);
13895 /* Finish the namespace. */
13897 /* Look for the final `}'. */
13898 cp_parser_require (parser
, CPP_CLOSE_BRACE
, RT_CLOSE_BRACE
);
13901 /* Parse a namespace-body.
13904 declaration-seq [opt] */
13907 cp_parser_namespace_body (cp_parser
* parser
)
13909 cp_parser_declaration_seq_opt (parser
);
13912 /* Parse a namespace-alias-definition.
13914 namespace-alias-definition:
13915 namespace identifier = qualified-namespace-specifier ; */
13918 cp_parser_namespace_alias_definition (cp_parser
* parser
)
13921 tree namespace_specifier
;
13923 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
13925 /* Look for the `namespace' keyword. */
13926 cp_parser_require_keyword (parser
, RID_NAMESPACE
, RT_NAMESPACE
);
13927 /* Look for the identifier. */
13928 identifier
= cp_parser_identifier (parser
);
13929 if (identifier
== error_mark_node
)
13931 /* Look for the `=' token. */
13932 if (!cp_parser_uncommitted_to_tentative_parse_p (parser
)
13933 && cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
13935 error_at (token
->location
, "%<namespace%> definition is not allowed here");
13936 /* Skip the definition. */
13937 cp_lexer_consume_token (parser
->lexer
);
13938 if (cp_parser_skip_to_closing_brace (parser
))
13939 cp_lexer_consume_token (parser
->lexer
);
13942 cp_parser_require (parser
, CPP_EQ
, RT_EQ
);
13943 /* Look for the qualified-namespace-specifier. */
13944 namespace_specifier
13945 = cp_parser_qualified_namespace_specifier (parser
);
13946 /* Look for the `;' token. */
13947 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
13949 /* Register the alias in the symbol table. */
13950 do_namespace_alias (identifier
, namespace_specifier
);
13953 /* Parse a qualified-namespace-specifier.
13955 qualified-namespace-specifier:
13956 :: [opt] nested-name-specifier [opt] namespace-name
13958 Returns a NAMESPACE_DECL corresponding to the specified
13962 cp_parser_qualified_namespace_specifier (cp_parser
* parser
)
13964 /* Look for the optional `::'. */
13965 cp_parser_global_scope_opt (parser
,
13966 /*current_scope_valid_p=*/false);
13968 /* Look for the optional nested-name-specifier. */
13969 cp_parser_nested_name_specifier_opt (parser
,
13970 /*typename_keyword_p=*/false,
13971 /*check_dependency_p=*/true,
13973 /*is_declaration=*/true);
13975 return cp_parser_namespace_name (parser
);
13978 /* Parse a using-declaration, or, if ACCESS_DECLARATION_P is true, an
13979 access declaration.
13982 using typename [opt] :: [opt] nested-name-specifier unqualified-id ;
13983 using :: unqualified-id ;
13985 access-declaration:
13991 cp_parser_using_declaration (cp_parser
* parser
,
13992 bool access_declaration_p
)
13995 bool typename_p
= false;
13996 bool global_scope_p
;
14001 if (access_declaration_p
)
14002 cp_parser_parse_tentatively (parser
);
14005 /* Look for the `using' keyword. */
14006 cp_parser_require_keyword (parser
, RID_USING
, RT_USING
);
14008 /* Peek at the next token. */
14009 token
= cp_lexer_peek_token (parser
->lexer
);
14010 /* See if it's `typename'. */
14011 if (token
->keyword
== RID_TYPENAME
)
14013 /* Remember that we've seen it. */
14015 /* Consume the `typename' token. */
14016 cp_lexer_consume_token (parser
->lexer
);
14020 /* Look for the optional global scope qualification. */
14022 = (cp_parser_global_scope_opt (parser
,
14023 /*current_scope_valid_p=*/false)
14026 /* If we saw `typename', or didn't see `::', then there must be a
14027 nested-name-specifier present. */
14028 if (typename_p
|| !global_scope_p
)
14029 qscope
= cp_parser_nested_name_specifier (parser
, typename_p
,
14030 /*check_dependency_p=*/true,
14032 /*is_declaration=*/true);
14033 /* Otherwise, we could be in either of the two productions. In that
14034 case, treat the nested-name-specifier as optional. */
14036 qscope
= cp_parser_nested_name_specifier_opt (parser
,
14037 /*typename_keyword_p=*/false,
14038 /*check_dependency_p=*/true,
14040 /*is_declaration=*/true);
14042 qscope
= global_namespace
;
14044 if (access_declaration_p
&& cp_parser_error_occurred (parser
))
14045 /* Something has already gone wrong; there's no need to parse
14046 further. Since an error has occurred, the return value of
14047 cp_parser_parse_definitely will be false, as required. */
14048 return cp_parser_parse_definitely (parser
);
14050 token
= cp_lexer_peek_token (parser
->lexer
);
14051 /* Parse the unqualified-id. */
14052 identifier
= cp_parser_unqualified_id (parser
,
14053 /*template_keyword_p=*/false,
14054 /*check_dependency_p=*/true,
14055 /*declarator_p=*/true,
14056 /*optional_p=*/false);
14058 if (access_declaration_p
)
14060 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
14061 cp_parser_simulate_error (parser
);
14062 if (!cp_parser_parse_definitely (parser
))
14066 /* The function we call to handle a using-declaration is different
14067 depending on what scope we are in. */
14068 if (qscope
== error_mark_node
|| identifier
== error_mark_node
)
14070 else if (TREE_CODE (identifier
) != IDENTIFIER_NODE
14071 && TREE_CODE (identifier
) != BIT_NOT_EXPR
)
14072 /* [namespace.udecl]
14074 A using declaration shall not name a template-id. */
14075 error_at (token
->location
,
14076 "a template-id may not appear in a using-declaration");
14079 if (at_class_scope_p ())
14081 /* Create the USING_DECL. */
14082 decl
= do_class_using_decl (parser
->scope
, identifier
);
14084 if (check_for_bare_parameter_packs (decl
))
14087 /* Add it to the list of members in this class. */
14088 finish_member_declaration (decl
);
14092 decl
= cp_parser_lookup_name_simple (parser
,
14095 if (decl
== error_mark_node
)
14096 cp_parser_name_lookup_error (parser
, identifier
,
14099 else if (check_for_bare_parameter_packs (decl
))
14101 else if (!at_namespace_scope_p ())
14102 do_local_using_decl (decl
, qscope
, identifier
);
14104 do_toplevel_using_decl (decl
, qscope
, identifier
);
14108 /* Look for the final `;'. */
14109 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
14114 /* Parse a using-directive.
14117 using namespace :: [opt] nested-name-specifier [opt]
14118 namespace-name ; */
14121 cp_parser_using_directive (cp_parser
* parser
)
14123 tree namespace_decl
;
14126 /* Look for the `using' keyword. */
14127 cp_parser_require_keyword (parser
, RID_USING
, RT_USING
);
14128 /* And the `namespace' keyword. */
14129 cp_parser_require_keyword (parser
, RID_NAMESPACE
, RT_NAMESPACE
);
14130 /* Look for the optional `::' operator. */
14131 cp_parser_global_scope_opt (parser
, /*current_scope_valid_p=*/false);
14132 /* And the optional nested-name-specifier. */
14133 cp_parser_nested_name_specifier_opt (parser
,
14134 /*typename_keyword_p=*/false,
14135 /*check_dependency_p=*/true,
14137 /*is_declaration=*/true);
14138 /* Get the namespace being used. */
14139 namespace_decl
= cp_parser_namespace_name (parser
);
14140 /* And any specified attributes. */
14141 attribs
= cp_parser_attributes_opt (parser
);
14142 /* Update the symbol table. */
14143 parse_using_directive (namespace_decl
, attribs
);
14144 /* Look for the final `;'. */
14145 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
14148 /* Parse an asm-definition.
14151 asm ( string-literal ) ;
14156 asm volatile [opt] ( string-literal ) ;
14157 asm volatile [opt] ( string-literal : asm-operand-list [opt] ) ;
14158 asm volatile [opt] ( string-literal : asm-operand-list [opt]
14159 : asm-operand-list [opt] ) ;
14160 asm volatile [opt] ( string-literal : asm-operand-list [opt]
14161 : asm-operand-list [opt]
14162 : asm-clobber-list [opt] ) ;
14163 asm volatile [opt] goto ( string-literal : : asm-operand-list [opt]
14164 : asm-clobber-list [opt]
14165 : asm-goto-list ) ; */
14168 cp_parser_asm_definition (cp_parser
* parser
)
14171 tree outputs
= NULL_TREE
;
14172 tree inputs
= NULL_TREE
;
14173 tree clobbers
= NULL_TREE
;
14174 tree labels
= NULL_TREE
;
14176 bool volatile_p
= false;
14177 bool extended_p
= false;
14178 bool invalid_inputs_p
= false;
14179 bool invalid_outputs_p
= false;
14180 bool goto_p
= false;
14181 required_token missing
= RT_NONE
;
14183 /* Look for the `asm' keyword. */
14184 cp_parser_require_keyword (parser
, RID_ASM
, RT_ASM
);
14185 /* See if the next token is `volatile'. */
14186 if (cp_parser_allow_gnu_extensions_p (parser
)
14187 && cp_lexer_next_token_is_keyword (parser
->lexer
, RID_VOLATILE
))
14189 /* Remember that we saw the `volatile' keyword. */
14191 /* Consume the token. */
14192 cp_lexer_consume_token (parser
->lexer
);
14194 if (cp_parser_allow_gnu_extensions_p (parser
)
14195 && parser
->in_function_body
14196 && cp_lexer_next_token_is_keyword (parser
->lexer
, RID_GOTO
))
14198 /* Remember that we saw the `goto' keyword. */
14200 /* Consume the token. */
14201 cp_lexer_consume_token (parser
->lexer
);
14203 /* Look for the opening `('. */
14204 if (!cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
14206 /* Look for the string. */
14207 string
= cp_parser_string_literal (parser
, false, false);
14208 if (string
== error_mark_node
)
14210 cp_parser_skip_to_closing_parenthesis (parser
, true, false,
14211 /*consume_paren=*/true);
14215 /* If we're allowing GNU extensions, check for the extended assembly
14216 syntax. Unfortunately, the `:' tokens need not be separated by
14217 a space in C, and so, for compatibility, we tolerate that here
14218 too. Doing that means that we have to treat the `::' operator as
14220 if (cp_parser_allow_gnu_extensions_p (parser
)
14221 && parser
->in_function_body
14222 && (cp_lexer_next_token_is (parser
->lexer
, CPP_COLON
)
14223 || cp_lexer_next_token_is (parser
->lexer
, CPP_SCOPE
)))
14225 bool inputs_p
= false;
14226 bool clobbers_p
= false;
14227 bool labels_p
= false;
14229 /* The extended syntax was used. */
14232 /* Look for outputs. */
14233 if (cp_lexer_next_token_is (parser
->lexer
, CPP_COLON
))
14235 /* Consume the `:'. */
14236 cp_lexer_consume_token (parser
->lexer
);
14237 /* Parse the output-operands. */
14238 if (cp_lexer_next_token_is_not (parser
->lexer
,
14240 && cp_lexer_next_token_is_not (parser
->lexer
,
14242 && cp_lexer_next_token_is_not (parser
->lexer
,
14245 outputs
= cp_parser_asm_operand_list (parser
);
14247 if (outputs
== error_mark_node
)
14248 invalid_outputs_p
= true;
14250 /* If the next token is `::', there are no outputs, and the
14251 next token is the beginning of the inputs. */
14252 else if (cp_lexer_next_token_is (parser
->lexer
, CPP_SCOPE
))
14253 /* The inputs are coming next. */
14256 /* Look for inputs. */
14258 || cp_lexer_next_token_is (parser
->lexer
, CPP_COLON
))
14260 /* Consume the `:' or `::'. */
14261 cp_lexer_consume_token (parser
->lexer
);
14262 /* Parse the output-operands. */
14263 if (cp_lexer_next_token_is_not (parser
->lexer
,
14265 && cp_lexer_next_token_is_not (parser
->lexer
,
14267 && cp_lexer_next_token_is_not (parser
->lexer
,
14269 inputs
= cp_parser_asm_operand_list (parser
);
14271 if (inputs
== error_mark_node
)
14272 invalid_inputs_p
= true;
14274 else if (cp_lexer_next_token_is (parser
->lexer
, CPP_SCOPE
))
14275 /* The clobbers are coming next. */
14278 /* Look for clobbers. */
14280 || cp_lexer_next_token_is (parser
->lexer
, CPP_COLON
))
14283 /* Consume the `:' or `::'. */
14284 cp_lexer_consume_token (parser
->lexer
);
14285 /* Parse the clobbers. */
14286 if (cp_lexer_next_token_is_not (parser
->lexer
,
14288 && cp_lexer_next_token_is_not (parser
->lexer
,
14290 clobbers
= cp_parser_asm_clobber_list (parser
);
14293 && cp_lexer_next_token_is (parser
->lexer
, CPP_SCOPE
))
14294 /* The labels are coming next. */
14297 /* Look for labels. */
14299 || (goto_p
&& cp_lexer_next_token_is (parser
->lexer
, CPP_COLON
)))
14302 /* Consume the `:' or `::'. */
14303 cp_lexer_consume_token (parser
->lexer
);
14304 /* Parse the labels. */
14305 labels
= cp_parser_asm_label_list (parser
);
14308 if (goto_p
&& !labels_p
)
14309 missing
= clobbers_p
? RT_COLON
: RT_COLON_SCOPE
;
14312 missing
= RT_COLON_SCOPE
;
14314 /* Look for the closing `)'. */
14315 if (!cp_parser_require (parser
, missing
? CPP_COLON
: CPP_CLOSE_PAREN
,
14316 missing
? missing
: RT_CLOSE_PAREN
))
14317 cp_parser_skip_to_closing_parenthesis (parser
, true, false,
14318 /*consume_paren=*/true);
14319 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
14321 if (!invalid_inputs_p
&& !invalid_outputs_p
)
14323 /* Create the ASM_EXPR. */
14324 if (parser
->in_function_body
)
14326 asm_stmt
= finish_asm_stmt (volatile_p
, string
, outputs
,
14327 inputs
, clobbers
, labels
);
14328 /* If the extended syntax was not used, mark the ASM_EXPR. */
14331 tree temp
= asm_stmt
;
14332 if (TREE_CODE (temp
) == CLEANUP_POINT_EXPR
)
14333 temp
= TREE_OPERAND (temp
, 0);
14335 ASM_INPUT_P (temp
) = 1;
14339 cgraph_add_asm_node (string
);
14343 /* Declarators [gram.dcl.decl] */
14345 /* Parse an init-declarator.
14348 declarator initializer [opt]
14353 declarator asm-specification [opt] attributes [opt] initializer [opt]
14355 function-definition:
14356 decl-specifier-seq [opt] declarator ctor-initializer [opt]
14358 decl-specifier-seq [opt] declarator function-try-block
14362 function-definition:
14363 __extension__ function-definition
14365 The DECL_SPECIFIERS apply to this declarator. Returns a
14366 representation of the entity declared. If MEMBER_P is TRUE, then
14367 this declarator appears in a class scope. The new DECL created by
14368 this declarator is returned.
14370 The CHECKS are access checks that should be performed once we know
14371 what entity is being declared (and, therefore, what classes have
14374 If FUNCTION_DEFINITION_ALLOWED_P then we handle the declarator and
14375 for a function-definition here as well. If the declarator is a
14376 declarator for a function-definition, *FUNCTION_DEFINITION_P will
14377 be TRUE upon return. By that point, the function-definition will
14378 have been completely parsed.
14380 FUNCTION_DEFINITION_P may be NULL if FUNCTION_DEFINITION_ALLOWED_P
14384 cp_parser_init_declarator (cp_parser
* parser
,
14385 cp_decl_specifier_seq
*decl_specifiers
,
14386 VEC (deferred_access_check
,gc
)* checks
,
14387 bool function_definition_allowed_p
,
14389 int declares_class_or_enum
,
14390 bool* function_definition_p
)
14392 cp_token
*token
= NULL
, *asm_spec_start_token
= NULL
,
14393 *attributes_start_token
= NULL
;
14394 cp_declarator
*declarator
;
14395 tree prefix_attributes
;
14397 tree asm_specification
;
14399 tree decl
= NULL_TREE
;
14401 int is_initialized
;
14402 /* Only valid if IS_INITIALIZED is true. In that case, CPP_EQ if
14403 initialized with "= ..", CPP_OPEN_PAREN if initialized with
14405 enum cpp_ttype initialization_kind
;
14406 bool is_direct_init
= false;
14407 bool is_non_constant_init
;
14408 int ctor_dtor_or_conv_p
;
14410 tree pushed_scope
= NULL
;
14412 /* Gather the attributes that were provided with the
14413 decl-specifiers. */
14414 prefix_attributes
= decl_specifiers
->attributes
;
14416 /* Assume that this is not the declarator for a function
14418 if (function_definition_p
)
14419 *function_definition_p
= false;
14421 /* Defer access checks while parsing the declarator; we cannot know
14422 what names are accessible until we know what is being
14424 resume_deferring_access_checks ();
14426 /* Parse the declarator. */
14427 token
= cp_lexer_peek_token (parser
->lexer
);
14429 = cp_parser_declarator (parser
, CP_PARSER_DECLARATOR_NAMED
,
14430 &ctor_dtor_or_conv_p
,
14431 /*parenthesized_p=*/NULL
,
14432 /*member_p=*/false);
14433 /* Gather up the deferred checks. */
14434 stop_deferring_access_checks ();
14436 /* If the DECLARATOR was erroneous, there's no need to go
14438 if (declarator
== cp_error_declarator
)
14439 return error_mark_node
;
14441 /* Check that the number of template-parameter-lists is OK. */
14442 if (!cp_parser_check_declarator_template_parameters (parser
, declarator
,
14444 return error_mark_node
;
14446 if (declares_class_or_enum
& 2)
14447 cp_parser_check_for_definition_in_return_type (declarator
,
14448 decl_specifiers
->type
,
14449 decl_specifiers
->type_location
);
14451 /* Figure out what scope the entity declared by the DECLARATOR is
14452 located in. `grokdeclarator' sometimes changes the scope, so
14453 we compute it now. */
14454 scope
= get_scope_of_declarator (declarator
);
14456 /* Perform any lookups in the declared type which were thought to be
14457 dependent, but are not in the scope of the declarator. */
14458 decl_specifiers
->type
14459 = maybe_update_decl_type (decl_specifiers
->type
, scope
);
14461 /* If we're allowing GNU extensions, look for an asm-specification
14463 if (cp_parser_allow_gnu_extensions_p (parser
))
14465 /* Look for an asm-specification. */
14466 asm_spec_start_token
= cp_lexer_peek_token (parser
->lexer
);
14467 asm_specification
= cp_parser_asm_specification_opt (parser
);
14468 /* And attributes. */
14469 attributes_start_token
= cp_lexer_peek_token (parser
->lexer
);
14470 attributes
= cp_parser_attributes_opt (parser
);
14474 asm_specification
= NULL_TREE
;
14475 attributes
= NULL_TREE
;
14478 /* Peek at the next token. */
14479 token
= cp_lexer_peek_token (parser
->lexer
);
14480 /* Check to see if the token indicates the start of a
14481 function-definition. */
14482 if (function_declarator_p (declarator
)
14483 && cp_parser_token_starts_function_definition_p (token
))
14485 if (!function_definition_allowed_p
)
14487 /* If a function-definition should not appear here, issue an
14489 cp_parser_error (parser
,
14490 "a function-definition is not allowed here");
14491 return error_mark_node
;
14495 location_t func_brace_location
14496 = cp_lexer_peek_token (parser
->lexer
)->location
;
14498 /* Neither attributes nor an asm-specification are allowed
14499 on a function-definition. */
14500 if (asm_specification
)
14501 error_at (asm_spec_start_token
->location
,
14502 "an asm-specification is not allowed "
14503 "on a function-definition");
14505 error_at (attributes_start_token
->location
,
14506 "attributes are not allowed on a function-definition");
14507 /* This is a function-definition. */
14508 *function_definition_p
= true;
14510 /* Parse the function definition. */
14512 decl
= cp_parser_save_member_function_body (parser
,
14515 prefix_attributes
);
14518 = (cp_parser_function_definition_from_specifiers_and_declarator
14519 (parser
, decl_specifiers
, prefix_attributes
, declarator
));
14521 if (decl
!= error_mark_node
&& DECL_STRUCT_FUNCTION (decl
))
14523 /* This is where the prologue starts... */
14524 DECL_STRUCT_FUNCTION (decl
)->function_start_locus
14525 = func_brace_location
;
14534 Only in function declarations for constructors, destructors, and
14535 type conversions can the decl-specifier-seq be omitted.
14537 We explicitly postpone this check past the point where we handle
14538 function-definitions because we tolerate function-definitions
14539 that are missing their return types in some modes. */
14540 if (!decl_specifiers
->any_specifiers_p
&& ctor_dtor_or_conv_p
<= 0)
14542 cp_parser_error (parser
,
14543 "expected constructor, destructor, or type conversion");
14544 return error_mark_node
;
14547 /* An `=' or an `(', or an '{' in C++0x, indicates an initializer. */
14548 if (token
->type
== CPP_EQ
14549 || token
->type
== CPP_OPEN_PAREN
14550 || token
->type
== CPP_OPEN_BRACE
)
14552 is_initialized
= SD_INITIALIZED
;
14553 initialization_kind
= token
->type
;
14555 if (token
->type
== CPP_EQ
14556 && function_declarator_p (declarator
))
14558 cp_token
*t2
= cp_lexer_peek_nth_token (parser
->lexer
, 2);
14559 if (t2
->keyword
== RID_DEFAULT
)
14560 is_initialized
= SD_DEFAULTED
;
14561 else if (t2
->keyword
== RID_DELETE
)
14562 is_initialized
= SD_DELETED
;
14567 /* If the init-declarator isn't initialized and isn't followed by a
14568 `,' or `;', it's not a valid init-declarator. */
14569 if (token
->type
!= CPP_COMMA
14570 && token
->type
!= CPP_SEMICOLON
)
14572 cp_parser_error (parser
, "expected initializer");
14573 return error_mark_node
;
14575 is_initialized
= SD_UNINITIALIZED
;
14576 initialization_kind
= CPP_EOF
;
14579 /* Because start_decl has side-effects, we should only call it if we
14580 know we're going ahead. By this point, we know that we cannot
14581 possibly be looking at any other construct. */
14582 cp_parser_commit_to_tentative_parse (parser
);
14584 /* If the decl specifiers were bad, issue an error now that we're
14585 sure this was intended to be a declarator. Then continue
14586 declaring the variable(s), as int, to try to cut down on further
14588 if (decl_specifiers
->any_specifiers_p
14589 && decl_specifiers
->type
== error_mark_node
)
14591 cp_parser_error (parser
, "invalid type in declaration");
14592 decl_specifiers
->type
= integer_type_node
;
14595 /* Check to see whether or not this declaration is a friend. */
14596 friend_p
= cp_parser_friend_p (decl_specifiers
);
14598 /* Enter the newly declared entry in the symbol table. If we're
14599 processing a declaration in a class-specifier, we wait until
14600 after processing the initializer. */
14603 if (parser
->in_unbraced_linkage_specification_p
)
14604 decl_specifiers
->storage_class
= sc_extern
;
14605 decl
= start_decl (declarator
, decl_specifiers
,
14606 is_initialized
, attributes
, prefix_attributes
,
14608 /* Adjust location of decl if declarator->id_loc is more appropriate:
14609 set, and decl wasn't merged with another decl, in which case its
14610 location would be different from input_location, and more accurate. */
14612 && declarator
->id_loc
!= UNKNOWN_LOCATION
14613 && DECL_SOURCE_LOCATION (decl
) == input_location
)
14614 DECL_SOURCE_LOCATION (decl
) = declarator
->id_loc
;
14617 /* Enter the SCOPE. That way unqualified names appearing in the
14618 initializer will be looked up in SCOPE. */
14619 pushed_scope
= push_scope (scope
);
14621 /* Perform deferred access control checks, now that we know in which
14622 SCOPE the declared entity resides. */
14623 if (!member_p
&& decl
)
14625 tree saved_current_function_decl
= NULL_TREE
;
14627 /* If the entity being declared is a function, pretend that we
14628 are in its scope. If it is a `friend', it may have access to
14629 things that would not otherwise be accessible. */
14630 if (TREE_CODE (decl
) == FUNCTION_DECL
)
14632 saved_current_function_decl
= current_function_decl
;
14633 current_function_decl
= decl
;
14636 /* Perform access checks for template parameters. */
14637 cp_parser_perform_template_parameter_access_checks (checks
);
14639 /* Perform the access control checks for the declarator and the
14640 decl-specifiers. */
14641 perform_deferred_access_checks ();
14643 /* Restore the saved value. */
14644 if (TREE_CODE (decl
) == FUNCTION_DECL
)
14645 current_function_decl
= saved_current_function_decl
;
14648 /* Parse the initializer. */
14649 initializer
= NULL_TREE
;
14650 is_direct_init
= false;
14651 is_non_constant_init
= true;
14652 if (is_initialized
)
14654 if (function_declarator_p (declarator
))
14656 cp_token
*initializer_start_token
= cp_lexer_peek_token (parser
->lexer
);
14657 if (initialization_kind
== CPP_EQ
)
14658 initializer
= cp_parser_pure_specifier (parser
);
14661 /* If the declaration was erroneous, we don't really
14662 know what the user intended, so just silently
14663 consume the initializer. */
14664 if (decl
!= error_mark_node
)
14665 error_at (initializer_start_token
->location
,
14666 "initializer provided for function");
14667 cp_parser_skip_to_closing_parenthesis (parser
,
14668 /*recovering=*/true,
14669 /*or_comma=*/false,
14670 /*consume_paren=*/true);
14675 /* We want to record the extra mangling scope for in-class
14676 initializers of class members and initializers of static data
14677 member templates. The former is a C++0x feature which isn't
14678 implemented yet, and I expect it will involve deferring
14679 parsing of the initializer until end of class as with default
14680 arguments. So right here we only handle the latter. */
14681 if (!member_p
&& processing_template_decl
)
14682 start_lambda_scope (decl
);
14683 initializer
= cp_parser_initializer (parser
,
14685 &is_non_constant_init
);
14686 if (!member_p
&& processing_template_decl
)
14687 finish_lambda_scope ();
14691 /* The old parser allows attributes to appear after a parenthesized
14692 initializer. Mark Mitchell proposed removing this functionality
14693 on the GCC mailing lists on 2002-08-13. This parser accepts the
14694 attributes -- but ignores them. */
14695 if (cp_parser_allow_gnu_extensions_p (parser
)
14696 && initialization_kind
== CPP_OPEN_PAREN
)
14697 if (cp_parser_attributes_opt (parser
))
14698 warning (OPT_Wattributes
,
14699 "attributes after parenthesized initializer ignored");
14701 /* For an in-class declaration, use `grokfield' to create the
14707 pop_scope (pushed_scope
);
14708 pushed_scope
= false;
14710 decl
= grokfield (declarator
, decl_specifiers
,
14711 initializer
, !is_non_constant_init
,
14712 /*asmspec=*/NULL_TREE
,
14713 prefix_attributes
);
14714 if (decl
&& TREE_CODE (decl
) == FUNCTION_DECL
)
14715 cp_parser_save_default_args (parser
, decl
);
14718 /* Finish processing the declaration. But, skip friend
14720 if (!friend_p
&& decl
&& decl
!= error_mark_node
)
14722 cp_finish_decl (decl
,
14723 initializer
, !is_non_constant_init
,
14725 /* If the initializer is in parentheses, then this is
14726 a direct-initialization, which means that an
14727 `explicit' constructor is OK. Otherwise, an
14728 `explicit' constructor cannot be used. */
14729 ((is_direct_init
|| !is_initialized
)
14730 ? LOOKUP_NORMAL
: LOOKUP_IMPLICIT
));
14732 else if ((cxx_dialect
!= cxx98
) && friend_p
14733 && decl
&& TREE_CODE (decl
) == FUNCTION_DECL
)
14734 /* Core issue #226 (C++0x only): A default template-argument
14735 shall not be specified in a friend class template
14737 check_default_tmpl_args (decl
, current_template_parms
, /*is_primary=*/1,
14738 /*is_partial=*/0, /*is_friend_decl=*/1);
14740 if (!friend_p
&& pushed_scope
)
14741 pop_scope (pushed_scope
);
14746 /* Parse a declarator.
14750 ptr-operator declarator
14752 abstract-declarator:
14753 ptr-operator abstract-declarator [opt]
14754 direct-abstract-declarator
14759 attributes [opt] direct-declarator
14760 attributes [opt] ptr-operator declarator
14762 abstract-declarator:
14763 attributes [opt] ptr-operator abstract-declarator [opt]
14764 attributes [opt] direct-abstract-declarator
14766 If CTOR_DTOR_OR_CONV_P is not NULL, *CTOR_DTOR_OR_CONV_P is used to
14767 detect constructor, destructor or conversion operators. It is set
14768 to -1 if the declarator is a name, and +1 if it is a
14769 function. Otherwise it is set to zero. Usually you just want to
14770 test for >0, but internally the negative value is used.
14772 (The reason for CTOR_DTOR_OR_CONV_P is that a declaration must have
14773 a decl-specifier-seq unless it declares a constructor, destructor,
14774 or conversion. It might seem that we could check this condition in
14775 semantic analysis, rather than parsing, but that makes it difficult
14776 to handle something like `f()'. We want to notice that there are
14777 no decl-specifiers, and therefore realize that this is an
14778 expression, not a declaration.)
14780 If PARENTHESIZED_P is non-NULL, *PARENTHESIZED_P is set to true iff
14781 the declarator is a direct-declarator of the form "(...)".
14783 MEMBER_P is true iff this declarator is a member-declarator. */
14785 static cp_declarator
*
14786 cp_parser_declarator (cp_parser
* parser
,
14787 cp_parser_declarator_kind dcl_kind
,
14788 int* ctor_dtor_or_conv_p
,
14789 bool* parenthesized_p
,
14792 cp_declarator
*declarator
;
14793 enum tree_code code
;
14794 cp_cv_quals cv_quals
;
14796 tree attributes
= NULL_TREE
;
14798 /* Assume this is not a constructor, destructor, or type-conversion
14800 if (ctor_dtor_or_conv_p
)
14801 *ctor_dtor_or_conv_p
= 0;
14803 if (cp_parser_allow_gnu_extensions_p (parser
))
14804 attributes
= cp_parser_attributes_opt (parser
);
14806 /* Check for the ptr-operator production. */
14807 cp_parser_parse_tentatively (parser
);
14808 /* Parse the ptr-operator. */
14809 code
= cp_parser_ptr_operator (parser
,
14812 /* If that worked, then we have a ptr-operator. */
14813 if (cp_parser_parse_definitely (parser
))
14815 /* If a ptr-operator was found, then this declarator was not
14817 if (parenthesized_p
)
14818 *parenthesized_p
= true;
14819 /* The dependent declarator is optional if we are parsing an
14820 abstract-declarator. */
14821 if (dcl_kind
!= CP_PARSER_DECLARATOR_NAMED
)
14822 cp_parser_parse_tentatively (parser
);
14824 /* Parse the dependent declarator. */
14825 declarator
= cp_parser_declarator (parser
, dcl_kind
,
14826 /*ctor_dtor_or_conv_p=*/NULL
,
14827 /*parenthesized_p=*/NULL
,
14828 /*member_p=*/false);
14830 /* If we are parsing an abstract-declarator, we must handle the
14831 case where the dependent declarator is absent. */
14832 if (dcl_kind
!= CP_PARSER_DECLARATOR_NAMED
14833 && !cp_parser_parse_definitely (parser
))
14836 declarator
= cp_parser_make_indirect_declarator
14837 (code
, class_type
, cv_quals
, declarator
);
14839 /* Everything else is a direct-declarator. */
14842 if (parenthesized_p
)
14843 *parenthesized_p
= cp_lexer_next_token_is (parser
->lexer
,
14845 declarator
= cp_parser_direct_declarator (parser
, dcl_kind
,
14846 ctor_dtor_or_conv_p
,
14850 if (attributes
&& declarator
&& declarator
!= cp_error_declarator
)
14851 declarator
->attributes
= attributes
;
14856 /* Parse a direct-declarator or direct-abstract-declarator.
14860 direct-declarator ( parameter-declaration-clause )
14861 cv-qualifier-seq [opt]
14862 exception-specification [opt]
14863 direct-declarator [ constant-expression [opt] ]
14866 direct-abstract-declarator:
14867 direct-abstract-declarator [opt]
14868 ( parameter-declaration-clause )
14869 cv-qualifier-seq [opt]
14870 exception-specification [opt]
14871 direct-abstract-declarator [opt] [ constant-expression [opt] ]
14872 ( abstract-declarator )
14874 Returns a representation of the declarator. DCL_KIND is
14875 CP_PARSER_DECLARATOR_ABSTRACT, if we are parsing a
14876 direct-abstract-declarator. It is CP_PARSER_DECLARATOR_NAMED, if
14877 we are parsing a direct-declarator. It is
14878 CP_PARSER_DECLARATOR_EITHER, if we can accept either - in the case
14879 of ambiguity we prefer an abstract declarator, as per
14880 [dcl.ambig.res]. CTOR_DTOR_OR_CONV_P and MEMBER_P are as for
14881 cp_parser_declarator. */
14883 static cp_declarator
*
14884 cp_parser_direct_declarator (cp_parser
* parser
,
14885 cp_parser_declarator_kind dcl_kind
,
14886 int* ctor_dtor_or_conv_p
,
14890 cp_declarator
*declarator
= NULL
;
14891 tree scope
= NULL_TREE
;
14892 bool saved_default_arg_ok_p
= parser
->default_arg_ok_p
;
14893 bool saved_in_declarator_p
= parser
->in_declarator_p
;
14895 tree pushed_scope
= NULL_TREE
;
14899 /* Peek at the next token. */
14900 token
= cp_lexer_peek_token (parser
->lexer
);
14901 if (token
->type
== CPP_OPEN_PAREN
)
14903 /* This is either a parameter-declaration-clause, or a
14904 parenthesized declarator. When we know we are parsing a
14905 named declarator, it must be a parenthesized declarator
14906 if FIRST is true. For instance, `(int)' is a
14907 parameter-declaration-clause, with an omitted
14908 direct-abstract-declarator. But `((*))', is a
14909 parenthesized abstract declarator. Finally, when T is a
14910 template parameter `(T)' is a
14911 parameter-declaration-clause, and not a parenthesized
14914 We first try and parse a parameter-declaration-clause,
14915 and then try a nested declarator (if FIRST is true).
14917 It is not an error for it not to be a
14918 parameter-declaration-clause, even when FIRST is
14924 The first is the declaration of a function while the
14925 second is the definition of a variable, including its
14928 Having seen only the parenthesis, we cannot know which of
14929 these two alternatives should be selected. Even more
14930 complex are examples like:
14935 The former is a function-declaration; the latter is a
14936 variable initialization.
14938 Thus again, we try a parameter-declaration-clause, and if
14939 that fails, we back out and return. */
14941 if (!first
|| dcl_kind
!= CP_PARSER_DECLARATOR_NAMED
)
14944 unsigned saved_num_template_parameter_lists
;
14945 bool is_declarator
= false;
14948 /* In a member-declarator, the only valid interpretation
14949 of a parenthesis is the start of a
14950 parameter-declaration-clause. (It is invalid to
14951 initialize a static data member with a parenthesized
14952 initializer; only the "=" form of initialization is
14955 cp_parser_parse_tentatively (parser
);
14957 /* Consume the `('. */
14958 cp_lexer_consume_token (parser
->lexer
);
14961 /* If this is going to be an abstract declarator, we're
14962 in a declarator and we can't have default args. */
14963 parser
->default_arg_ok_p
= false;
14964 parser
->in_declarator_p
= true;
14967 /* Inside the function parameter list, surrounding
14968 template-parameter-lists do not apply. */
14969 saved_num_template_parameter_lists
14970 = parser
->num_template_parameter_lists
;
14971 parser
->num_template_parameter_lists
= 0;
14973 begin_scope (sk_function_parms
, NULL_TREE
);
14975 /* Parse the parameter-declaration-clause. */
14976 params
= cp_parser_parameter_declaration_clause (parser
);
14978 parser
->num_template_parameter_lists
14979 = saved_num_template_parameter_lists
;
14981 /* If all went well, parse the cv-qualifier-seq and the
14982 exception-specification. */
14983 if (member_p
|| cp_parser_parse_definitely (parser
))
14985 cp_cv_quals cv_quals
;
14986 tree exception_specification
;
14989 is_declarator
= true;
14991 if (ctor_dtor_or_conv_p
)
14992 *ctor_dtor_or_conv_p
= *ctor_dtor_or_conv_p
< 0;
14994 /* Consume the `)'. */
14995 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
14997 /* Parse the cv-qualifier-seq. */
14998 cv_quals
= cp_parser_cv_qualifier_seq_opt (parser
);
14999 /* And the exception-specification. */
15000 exception_specification
15001 = cp_parser_exception_specification_opt (parser
);
15004 = cp_parser_late_return_type_opt (parser
);
15006 /* Create the function-declarator. */
15007 declarator
= make_call_declarator (declarator
,
15010 exception_specification
,
15012 /* Any subsequent parameter lists are to do with
15013 return type, so are not those of the declared
15015 parser
->default_arg_ok_p
= false;
15018 /* Remove the function parms from scope. */
15019 for (t
= current_binding_level
->names
; t
; t
= DECL_CHAIN (t
))
15020 pop_binding (DECL_NAME (t
), t
);
15024 /* Repeat the main loop. */
15028 /* If this is the first, we can try a parenthesized
15032 bool saved_in_type_id_in_expr_p
;
15034 parser
->default_arg_ok_p
= saved_default_arg_ok_p
;
15035 parser
->in_declarator_p
= saved_in_declarator_p
;
15037 /* Consume the `('. */
15038 cp_lexer_consume_token (parser
->lexer
);
15039 /* Parse the nested declarator. */
15040 saved_in_type_id_in_expr_p
= parser
->in_type_id_in_expr_p
;
15041 parser
->in_type_id_in_expr_p
= true;
15043 = cp_parser_declarator (parser
, dcl_kind
, ctor_dtor_or_conv_p
,
15044 /*parenthesized_p=*/NULL
,
15046 parser
->in_type_id_in_expr_p
= saved_in_type_id_in_expr_p
;
15048 /* Expect a `)'. */
15049 if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
15050 declarator
= cp_error_declarator
;
15051 if (declarator
== cp_error_declarator
)
15054 goto handle_declarator
;
15056 /* Otherwise, we must be done. */
15060 else if ((!first
|| dcl_kind
!= CP_PARSER_DECLARATOR_NAMED
)
15061 && token
->type
== CPP_OPEN_SQUARE
)
15063 /* Parse an array-declarator. */
15066 if (ctor_dtor_or_conv_p
)
15067 *ctor_dtor_or_conv_p
= 0;
15070 parser
->default_arg_ok_p
= false;
15071 parser
->in_declarator_p
= true;
15072 /* Consume the `['. */
15073 cp_lexer_consume_token (parser
->lexer
);
15074 /* Peek at the next token. */
15075 token
= cp_lexer_peek_token (parser
->lexer
);
15076 /* If the next token is `]', then there is no
15077 constant-expression. */
15078 if (token
->type
!= CPP_CLOSE_SQUARE
)
15080 bool non_constant_p
;
15083 = cp_parser_constant_expression (parser
,
15084 /*allow_non_constant=*/true,
15086 if (!non_constant_p
|| cxx_dialect
>= cxx0x
)
15088 /* Normally, the array bound must be an integral constant
15089 expression. However, as an extension, we allow VLAs
15090 in function scopes as long as they aren't part of a
15091 parameter declaration. */
15092 else if (!parser
->in_function_body
15093 || current_binding_level
->kind
== sk_function_parms
)
15095 cp_parser_error (parser
,
15096 "array bound is not an integer constant");
15097 bounds
= error_mark_node
;
15099 else if (processing_template_decl
&& !error_operand_p (bounds
))
15101 /* Remember this wasn't a constant-expression. */
15102 bounds
= build_nop (TREE_TYPE (bounds
), bounds
);
15103 TREE_SIDE_EFFECTS (bounds
) = 1;
15107 bounds
= NULL_TREE
;
15108 /* Look for the closing `]'. */
15109 if (!cp_parser_require (parser
, CPP_CLOSE_SQUARE
, RT_CLOSE_SQUARE
))
15111 declarator
= cp_error_declarator
;
15115 declarator
= make_array_declarator (declarator
, bounds
);
15117 else if (first
&& dcl_kind
!= CP_PARSER_DECLARATOR_ABSTRACT
)
15120 tree qualifying_scope
;
15121 tree unqualified_name
;
15122 special_function_kind sfk
;
15124 bool pack_expansion_p
= false;
15125 cp_token
*declarator_id_start_token
;
15127 /* Parse a declarator-id */
15128 abstract_ok
= (dcl_kind
== CP_PARSER_DECLARATOR_EITHER
);
15131 cp_parser_parse_tentatively (parser
);
15133 /* If we see an ellipsis, we should be looking at a
15135 if (token
->type
== CPP_ELLIPSIS
)
15137 /* Consume the `...' */
15138 cp_lexer_consume_token (parser
->lexer
);
15140 pack_expansion_p
= true;
15144 declarator_id_start_token
= cp_lexer_peek_token (parser
->lexer
);
15146 = cp_parser_declarator_id (parser
, /*optional_p=*/abstract_ok
);
15147 qualifying_scope
= parser
->scope
;
15152 if (!unqualified_name
&& pack_expansion_p
)
15154 /* Check whether an error occurred. */
15155 okay
= !cp_parser_error_occurred (parser
);
15157 /* We already consumed the ellipsis to mark a
15158 parameter pack, but we have no way to report it,
15159 so abort the tentative parse. We will be exiting
15160 immediately anyway. */
15161 cp_parser_abort_tentative_parse (parser
);
15164 okay
= cp_parser_parse_definitely (parser
);
15167 unqualified_name
= error_mark_node
;
15168 else if (unqualified_name
15169 && (qualifying_scope
15170 || (TREE_CODE (unqualified_name
)
15171 != IDENTIFIER_NODE
)))
15173 cp_parser_error (parser
, "expected unqualified-id");
15174 unqualified_name
= error_mark_node
;
15178 if (!unqualified_name
)
15180 if (unqualified_name
== error_mark_node
)
15182 declarator
= cp_error_declarator
;
15183 pack_expansion_p
= false;
15184 declarator
->parameter_pack_p
= false;
15188 if (qualifying_scope
&& at_namespace_scope_p ()
15189 && TREE_CODE (qualifying_scope
) == TYPENAME_TYPE
)
15191 /* In the declaration of a member of a template class
15192 outside of the class itself, the SCOPE will sometimes
15193 be a TYPENAME_TYPE. For example, given:
15195 template <typename T>
15196 int S<T>::R::i = 3;
15198 the SCOPE will be a TYPENAME_TYPE for `S<T>::R'. In
15199 this context, we must resolve S<T>::R to an ordinary
15200 type, rather than a typename type.
15202 The reason we normally avoid resolving TYPENAME_TYPEs
15203 is that a specialization of `S' might render
15204 `S<T>::R' not a type. However, if `S' is
15205 specialized, then this `i' will not be used, so there
15206 is no harm in resolving the types here. */
15209 /* Resolve the TYPENAME_TYPE. */
15210 type
= resolve_typename_type (qualifying_scope
,
15211 /*only_current_p=*/false);
15212 /* If that failed, the declarator is invalid. */
15213 if (TREE_CODE (type
) == TYPENAME_TYPE
)
15215 if (typedef_variant_p (type
))
15216 error_at (declarator_id_start_token
->location
,
15217 "cannot define member of dependent typedef "
15220 error_at (declarator_id_start_token
->location
,
15221 "%<%T::%E%> is not a type",
15222 TYPE_CONTEXT (qualifying_scope
),
15223 TYPE_IDENTIFIER (qualifying_scope
));
15225 qualifying_scope
= type
;
15230 if (unqualified_name
)
15234 if (qualifying_scope
15235 && CLASS_TYPE_P (qualifying_scope
))
15236 class_type
= qualifying_scope
;
15238 class_type
= current_class_type
;
15240 if (TREE_CODE (unqualified_name
) == TYPE_DECL
)
15242 tree name_type
= TREE_TYPE (unqualified_name
);
15243 if (class_type
&& same_type_p (name_type
, class_type
))
15245 if (qualifying_scope
15246 && CLASSTYPE_USE_TEMPLATE (name_type
))
15248 error_at (declarator_id_start_token
->location
,
15249 "invalid use of constructor as a template");
15250 inform (declarator_id_start_token
->location
,
15251 "use %<%T::%D%> instead of %<%T::%D%> to "
15252 "name the constructor in a qualified name",
15254 DECL_NAME (TYPE_TI_TEMPLATE (class_type
)),
15255 class_type
, name_type
);
15256 declarator
= cp_error_declarator
;
15260 unqualified_name
= constructor_name (class_type
);
15264 /* We do not attempt to print the declarator
15265 here because we do not have enough
15266 information about its original syntactic
15268 cp_parser_error (parser
, "invalid declarator");
15269 declarator
= cp_error_declarator
;
15276 if (TREE_CODE (unqualified_name
) == BIT_NOT_EXPR
)
15277 sfk
= sfk_destructor
;
15278 else if (IDENTIFIER_TYPENAME_P (unqualified_name
))
15279 sfk
= sfk_conversion
;
15280 else if (/* There's no way to declare a constructor
15281 for an anonymous type, even if the type
15282 got a name for linkage purposes. */
15283 !TYPE_WAS_ANONYMOUS (class_type
)
15284 && constructor_name_p (unqualified_name
,
15287 unqualified_name
= constructor_name (class_type
);
15288 sfk
= sfk_constructor
;
15290 else if (is_overloaded_fn (unqualified_name
)
15291 && DECL_CONSTRUCTOR_P (get_first_fn
15292 (unqualified_name
)))
15293 sfk
= sfk_constructor
;
15295 if (ctor_dtor_or_conv_p
&& sfk
!= sfk_none
)
15296 *ctor_dtor_or_conv_p
= -1;
15299 declarator
= make_id_declarator (qualifying_scope
,
15302 declarator
->id_loc
= token
->location
;
15303 declarator
->parameter_pack_p
= pack_expansion_p
;
15305 if (pack_expansion_p
)
15306 maybe_warn_variadic_templates ();
15309 handle_declarator
:;
15310 scope
= get_scope_of_declarator (declarator
);
15312 /* Any names that appear after the declarator-id for a
15313 member are looked up in the containing scope. */
15314 pushed_scope
= push_scope (scope
);
15315 parser
->in_declarator_p
= true;
15316 if ((ctor_dtor_or_conv_p
&& *ctor_dtor_or_conv_p
)
15317 || (declarator
&& declarator
->kind
== cdk_id
))
15318 /* Default args are only allowed on function
15320 parser
->default_arg_ok_p
= saved_default_arg_ok_p
;
15322 parser
->default_arg_ok_p
= false;
15331 /* For an abstract declarator, we might wind up with nothing at this
15332 point. That's an error; the declarator is not optional. */
15334 cp_parser_error (parser
, "expected declarator");
15336 /* If we entered a scope, we must exit it now. */
15338 pop_scope (pushed_scope
);
15340 parser
->default_arg_ok_p
= saved_default_arg_ok_p
;
15341 parser
->in_declarator_p
= saved_in_declarator_p
;
15346 /* Parse a ptr-operator.
15349 * cv-qualifier-seq [opt]
15351 :: [opt] nested-name-specifier * cv-qualifier-seq [opt]
15356 & cv-qualifier-seq [opt]
15358 Returns INDIRECT_REF if a pointer, or pointer-to-member, was used.
15359 Returns ADDR_EXPR if a reference was used, or NON_LVALUE_EXPR for
15360 an rvalue reference. In the case of a pointer-to-member, *TYPE is
15361 filled in with the TYPE containing the member. *CV_QUALS is
15362 filled in with the cv-qualifier-seq, or TYPE_UNQUALIFIED, if there
15363 are no cv-qualifiers. Returns ERROR_MARK if an error occurred.
15364 Note that the tree codes returned by this function have nothing
15365 to do with the types of trees that will be eventually be created
15366 to represent the pointer or reference type being parsed. They are
15367 just constants with suggestive names. */
15368 static enum tree_code
15369 cp_parser_ptr_operator (cp_parser
* parser
,
15371 cp_cv_quals
*cv_quals
)
15373 enum tree_code code
= ERROR_MARK
;
15376 /* Assume that it's not a pointer-to-member. */
15378 /* And that there are no cv-qualifiers. */
15379 *cv_quals
= TYPE_UNQUALIFIED
;
15381 /* Peek at the next token. */
15382 token
= cp_lexer_peek_token (parser
->lexer
);
15384 /* If it's a `*', `&' or `&&' we have a pointer or reference. */
15385 if (token
->type
== CPP_MULT
)
15386 code
= INDIRECT_REF
;
15387 else if (token
->type
== CPP_AND
)
15389 else if ((cxx_dialect
!= cxx98
) &&
15390 token
->type
== CPP_AND_AND
) /* C++0x only */
15391 code
= NON_LVALUE_EXPR
;
15393 if (code
!= ERROR_MARK
)
15395 /* Consume the `*', `&' or `&&'. */
15396 cp_lexer_consume_token (parser
->lexer
);
15398 /* A `*' can be followed by a cv-qualifier-seq, and so can a
15399 `&', if we are allowing GNU extensions. (The only qualifier
15400 that can legally appear after `&' is `restrict', but that is
15401 enforced during semantic analysis. */
15402 if (code
== INDIRECT_REF
15403 || cp_parser_allow_gnu_extensions_p (parser
))
15404 *cv_quals
= cp_parser_cv_qualifier_seq_opt (parser
);
15408 /* Try the pointer-to-member case. */
15409 cp_parser_parse_tentatively (parser
);
15410 /* Look for the optional `::' operator. */
15411 cp_parser_global_scope_opt (parser
,
15412 /*current_scope_valid_p=*/false);
15413 /* Look for the nested-name specifier. */
15414 token
= cp_lexer_peek_token (parser
->lexer
);
15415 cp_parser_nested_name_specifier (parser
,
15416 /*typename_keyword_p=*/false,
15417 /*check_dependency_p=*/true,
15419 /*is_declaration=*/false);
15420 /* If we found it, and the next token is a `*', then we are
15421 indeed looking at a pointer-to-member operator. */
15422 if (!cp_parser_error_occurred (parser
)
15423 && cp_parser_require (parser
, CPP_MULT
, RT_MULT
))
15425 /* Indicate that the `*' operator was used. */
15426 code
= INDIRECT_REF
;
15428 if (TREE_CODE (parser
->scope
) == NAMESPACE_DECL
)
15429 error_at (token
->location
, "%qD is a namespace", parser
->scope
);
15432 /* The type of which the member is a member is given by the
15434 *type
= parser
->scope
;
15435 /* The next name will not be qualified. */
15436 parser
->scope
= NULL_TREE
;
15437 parser
->qualifying_scope
= NULL_TREE
;
15438 parser
->object_scope
= NULL_TREE
;
15439 /* Look for the optional cv-qualifier-seq. */
15440 *cv_quals
= cp_parser_cv_qualifier_seq_opt (parser
);
15443 /* If that didn't work we don't have a ptr-operator. */
15444 if (!cp_parser_parse_definitely (parser
))
15445 cp_parser_error (parser
, "expected ptr-operator");
15451 /* Parse an (optional) cv-qualifier-seq.
15454 cv-qualifier cv-qualifier-seq [opt]
15465 Returns a bitmask representing the cv-qualifiers. */
15468 cp_parser_cv_qualifier_seq_opt (cp_parser
* parser
)
15470 cp_cv_quals cv_quals
= TYPE_UNQUALIFIED
;
15475 cp_cv_quals cv_qualifier
;
15477 /* Peek at the next token. */
15478 token
= cp_lexer_peek_token (parser
->lexer
);
15479 /* See if it's a cv-qualifier. */
15480 switch (token
->keyword
)
15483 cv_qualifier
= TYPE_QUAL_CONST
;
15487 cv_qualifier
= TYPE_QUAL_VOLATILE
;
15491 cv_qualifier
= TYPE_QUAL_RESTRICT
;
15495 cv_qualifier
= TYPE_UNQUALIFIED
;
15502 if (cv_quals
& cv_qualifier
)
15504 error_at (token
->location
, "duplicate cv-qualifier");
15505 cp_lexer_purge_token (parser
->lexer
);
15509 cp_lexer_consume_token (parser
->lexer
);
15510 cv_quals
|= cv_qualifier
;
15517 /* Parse a late-specified return type, if any. This is not a separate
15518 non-terminal, but part of a function declarator, which looks like
15520 -> trailing-type-specifier-seq abstract-declarator(opt)
15522 Returns the type indicated by the type-id. */
15525 cp_parser_late_return_type_opt (cp_parser
* parser
)
15529 /* Peek at the next token. */
15530 token
= cp_lexer_peek_token (parser
->lexer
);
15531 /* A late-specified return type is indicated by an initial '->'. */
15532 if (token
->type
!= CPP_DEREF
)
15535 /* Consume the ->. */
15536 cp_lexer_consume_token (parser
->lexer
);
15538 return cp_parser_trailing_type_id (parser
);
15541 /* Parse a declarator-id.
15545 :: [opt] nested-name-specifier [opt] type-name
15547 In the `id-expression' case, the value returned is as for
15548 cp_parser_id_expression if the id-expression was an unqualified-id.
15549 If the id-expression was a qualified-id, then a SCOPE_REF is
15550 returned. The first operand is the scope (either a NAMESPACE_DECL
15551 or TREE_TYPE), but the second is still just a representation of an
15555 cp_parser_declarator_id (cp_parser
* parser
, bool optional_p
)
15558 /* The expression must be an id-expression. Assume that qualified
15559 names are the names of types so that:
15562 int S<T>::R::i = 3;
15564 will work; we must treat `S<T>::R' as the name of a type.
15565 Similarly, assume that qualified names are templates, where
15569 int S<T>::R<T>::i = 3;
15572 id
= cp_parser_id_expression (parser
,
15573 /*template_keyword_p=*/false,
15574 /*check_dependency_p=*/false,
15575 /*template_p=*/NULL
,
15576 /*declarator_p=*/true,
15578 if (id
&& BASELINK_P (id
))
15579 id
= BASELINK_FUNCTIONS (id
);
15583 /* Parse a type-id.
15586 type-specifier-seq abstract-declarator [opt]
15588 Returns the TYPE specified. */
15591 cp_parser_type_id_1 (cp_parser
* parser
, bool is_template_arg
,
15592 bool is_trailing_return
)
15594 cp_decl_specifier_seq type_specifier_seq
;
15595 cp_declarator
*abstract_declarator
;
15597 /* Parse the type-specifier-seq. */
15598 cp_parser_type_specifier_seq (parser
, /*is_declaration=*/false,
15599 is_trailing_return
,
15600 &type_specifier_seq
);
15601 if (type_specifier_seq
.type
== error_mark_node
)
15602 return error_mark_node
;
15604 /* There might or might not be an abstract declarator. */
15605 cp_parser_parse_tentatively (parser
);
15606 /* Look for the declarator. */
15607 abstract_declarator
15608 = cp_parser_declarator (parser
, CP_PARSER_DECLARATOR_ABSTRACT
, NULL
,
15609 /*parenthesized_p=*/NULL
,
15610 /*member_p=*/false);
15611 /* Check to see if there really was a declarator. */
15612 if (!cp_parser_parse_definitely (parser
))
15613 abstract_declarator
= NULL
;
15615 if (type_specifier_seq
.type
15616 && type_uses_auto (type_specifier_seq
.type
))
15618 /* A type-id with type 'auto' is only ok if the abstract declarator
15619 is a function declarator with a late-specified return type. */
15620 if (abstract_declarator
15621 && abstract_declarator
->kind
== cdk_function
15622 && abstract_declarator
->u
.function
.late_return_type
)
15626 error ("invalid use of %<auto%>");
15627 return error_mark_node
;
15631 return groktypename (&type_specifier_seq
, abstract_declarator
,
15635 static tree
cp_parser_type_id (cp_parser
*parser
)
15637 return cp_parser_type_id_1 (parser
, false, false);
15640 static tree
cp_parser_template_type_arg (cp_parser
*parser
)
15642 return cp_parser_type_id_1 (parser
, true, false);
15645 static tree
cp_parser_trailing_type_id (cp_parser
*parser
)
15647 return cp_parser_type_id_1 (parser
, false, true);
15650 /* Parse a type-specifier-seq.
15652 type-specifier-seq:
15653 type-specifier type-specifier-seq [opt]
15657 type-specifier-seq:
15658 attributes type-specifier-seq [opt]
15660 If IS_DECLARATION is true, we are at the start of a "condition" or
15661 exception-declaration, so we might be followed by a declarator-id.
15663 If IS_TRAILING_RETURN is true, we are in a trailing-return-type,
15664 i.e. we've just seen "->".
15666 Sets *TYPE_SPECIFIER_SEQ to represent the sequence. */
15669 cp_parser_type_specifier_seq (cp_parser
* parser
,
15670 bool is_declaration
,
15671 bool is_trailing_return
,
15672 cp_decl_specifier_seq
*type_specifier_seq
)
15674 bool seen_type_specifier
= false;
15675 cp_parser_flags flags
= CP_PARSER_FLAGS_OPTIONAL
;
15676 cp_token
*start_token
= NULL
;
15678 /* Clear the TYPE_SPECIFIER_SEQ. */
15679 clear_decl_specs (type_specifier_seq
);
15681 /* In the context of a trailing return type, enum E { } is an
15682 elaborated-type-specifier followed by a function-body, not an
15684 if (is_trailing_return
)
15685 flags
|= CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS
;
15687 /* Parse the type-specifiers and attributes. */
15690 tree type_specifier
;
15691 bool is_cv_qualifier
;
15693 /* Check for attributes first. */
15694 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_ATTRIBUTE
))
15696 type_specifier_seq
->attributes
=
15697 chainon (type_specifier_seq
->attributes
,
15698 cp_parser_attributes_opt (parser
));
15702 /* record the token of the beginning of the type specifier seq,
15703 for error reporting purposes*/
15705 start_token
= cp_lexer_peek_token (parser
->lexer
);
15707 /* Look for the type-specifier. */
15708 type_specifier
= cp_parser_type_specifier (parser
,
15710 type_specifier_seq
,
15711 /*is_declaration=*/false,
15714 if (!type_specifier
)
15716 /* If the first type-specifier could not be found, this is not a
15717 type-specifier-seq at all. */
15718 if (!seen_type_specifier
)
15720 cp_parser_error (parser
, "expected type-specifier");
15721 type_specifier_seq
->type
= error_mark_node
;
15724 /* If subsequent type-specifiers could not be found, the
15725 type-specifier-seq is complete. */
15729 seen_type_specifier
= true;
15730 /* The standard says that a condition can be:
15732 type-specifier-seq declarator = assignment-expression
15739 we should treat the "S" as a declarator, not as a
15740 type-specifier. The standard doesn't say that explicitly for
15741 type-specifier-seq, but it does say that for
15742 decl-specifier-seq in an ordinary declaration. Perhaps it
15743 would be clearer just to allow a decl-specifier-seq here, and
15744 then add a semantic restriction that if any decl-specifiers
15745 that are not type-specifiers appear, the program is invalid. */
15746 if (is_declaration
&& !is_cv_qualifier
)
15747 flags
|= CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES
;
15750 cp_parser_check_decl_spec (type_specifier_seq
, start_token
->location
);
15753 /* Parse a parameter-declaration-clause.
15755 parameter-declaration-clause:
15756 parameter-declaration-list [opt] ... [opt]
15757 parameter-declaration-list , ...
15759 Returns a representation for the parameter declarations. A return
15760 value of NULL indicates a parameter-declaration-clause consisting
15761 only of an ellipsis. */
15764 cp_parser_parameter_declaration_clause (cp_parser
* parser
)
15771 /* Peek at the next token. */
15772 token
= cp_lexer_peek_token (parser
->lexer
);
15773 /* Check for trivial parameter-declaration-clauses. */
15774 if (token
->type
== CPP_ELLIPSIS
)
15776 /* Consume the `...' token. */
15777 cp_lexer_consume_token (parser
->lexer
);
15780 else if (token
->type
== CPP_CLOSE_PAREN
)
15781 /* There are no parameters. */
15783 #ifndef NO_IMPLICIT_EXTERN_C
15784 if (in_system_header
&& current_class_type
== NULL
15785 && current_lang_name
== lang_name_c
)
15789 return void_list_node
;
15791 /* Check for `(void)', too, which is a special case. */
15792 else if (token
->keyword
== RID_VOID
15793 && (cp_lexer_peek_nth_token (parser
->lexer
, 2)->type
15794 == CPP_CLOSE_PAREN
))
15796 /* Consume the `void' token. */
15797 cp_lexer_consume_token (parser
->lexer
);
15798 /* There are no parameters. */
15799 return void_list_node
;
15802 /* Parse the parameter-declaration-list. */
15803 parameters
= cp_parser_parameter_declaration_list (parser
, &is_error
);
15804 /* If a parse error occurred while parsing the
15805 parameter-declaration-list, then the entire
15806 parameter-declaration-clause is erroneous. */
15810 /* Peek at the next token. */
15811 token
= cp_lexer_peek_token (parser
->lexer
);
15812 /* If it's a `,', the clause should terminate with an ellipsis. */
15813 if (token
->type
== CPP_COMMA
)
15815 /* Consume the `,'. */
15816 cp_lexer_consume_token (parser
->lexer
);
15817 /* Expect an ellipsis. */
15819 = (cp_parser_require (parser
, CPP_ELLIPSIS
, RT_ELLIPSIS
) != NULL
);
15821 /* It might also be `...' if the optional trailing `,' was
15823 else if (token
->type
== CPP_ELLIPSIS
)
15825 /* Consume the `...' token. */
15826 cp_lexer_consume_token (parser
->lexer
);
15827 /* And remember that we saw it. */
15831 ellipsis_p
= false;
15833 /* Finish the parameter list. */
15835 parameters
= chainon (parameters
, void_list_node
);
15840 /* Parse a parameter-declaration-list.
15842 parameter-declaration-list:
15843 parameter-declaration
15844 parameter-declaration-list , parameter-declaration
15846 Returns a representation of the parameter-declaration-list, as for
15847 cp_parser_parameter_declaration_clause. However, the
15848 `void_list_node' is never appended to the list. Upon return,
15849 *IS_ERROR will be true iff an error occurred. */
15852 cp_parser_parameter_declaration_list (cp_parser
* parser
, bool *is_error
)
15854 tree parameters
= NULL_TREE
;
15855 tree
*tail
= ¶meters
;
15856 bool saved_in_unbraced_linkage_specification_p
;
15859 /* Assume all will go well. */
15861 /* The special considerations that apply to a function within an
15862 unbraced linkage specifications do not apply to the parameters
15863 to the function. */
15864 saved_in_unbraced_linkage_specification_p
15865 = parser
->in_unbraced_linkage_specification_p
;
15866 parser
->in_unbraced_linkage_specification_p
= false;
15868 /* Look for more parameters. */
15871 cp_parameter_declarator
*parameter
;
15872 tree decl
= error_mark_node
;
15873 bool parenthesized_p
;
15874 /* Parse the parameter. */
15876 = cp_parser_parameter_declaration (parser
,
15877 /*template_parm_p=*/false,
15880 /* We don't know yet if the enclosing context is deprecated, so wait
15881 and warn in grokparms if appropriate. */
15882 deprecated_state
= DEPRECATED_SUPPRESS
;
15885 decl
= grokdeclarator (parameter
->declarator
,
15886 ¶meter
->decl_specifiers
,
15888 parameter
->default_argument
!= NULL_TREE
,
15889 ¶meter
->decl_specifiers
.attributes
);
15891 deprecated_state
= DEPRECATED_NORMAL
;
15893 /* If a parse error occurred parsing the parameter declaration,
15894 then the entire parameter-declaration-list is erroneous. */
15895 if (decl
== error_mark_node
)
15898 parameters
= error_mark_node
;
15902 if (parameter
->decl_specifiers
.attributes
)
15903 cplus_decl_attributes (&decl
,
15904 parameter
->decl_specifiers
.attributes
,
15906 if (DECL_NAME (decl
))
15907 decl
= pushdecl (decl
);
15909 if (decl
!= error_mark_node
)
15911 retrofit_lang_decl (decl
);
15912 DECL_PARM_INDEX (decl
) = ++index
;
15915 /* Add the new parameter to the list. */
15916 *tail
= build_tree_list (parameter
->default_argument
, decl
);
15917 tail
= &TREE_CHAIN (*tail
);
15919 /* Peek at the next token. */
15920 if (cp_lexer_next_token_is (parser
->lexer
, CPP_CLOSE_PAREN
)
15921 || cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
)
15922 /* These are for Objective-C++ */
15923 || cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
)
15924 || cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
15925 /* The parameter-declaration-list is complete. */
15927 else if (cp_lexer_next_token_is (parser
->lexer
, CPP_COMMA
))
15931 /* Peek at the next token. */
15932 token
= cp_lexer_peek_nth_token (parser
->lexer
, 2);
15933 /* If it's an ellipsis, then the list is complete. */
15934 if (token
->type
== CPP_ELLIPSIS
)
15936 /* Otherwise, there must be more parameters. Consume the
15938 cp_lexer_consume_token (parser
->lexer
);
15939 /* When parsing something like:
15941 int i(float f, double d)
15943 we can tell after seeing the declaration for "f" that we
15944 are not looking at an initialization of a variable "i",
15945 but rather at the declaration of a function "i".
15947 Due to the fact that the parsing of template arguments
15948 (as specified to a template-id) requires backtracking we
15949 cannot use this technique when inside a template argument
15951 if (!parser
->in_template_argument_list_p
15952 && !parser
->in_type_id_in_expr_p
15953 && cp_parser_uncommitted_to_tentative_parse_p (parser
)
15954 /* However, a parameter-declaration of the form
15955 "foat(f)" (which is a valid declaration of a
15956 parameter "f") can also be interpreted as an
15957 expression (the conversion of "f" to "float"). */
15958 && !parenthesized_p
)
15959 cp_parser_commit_to_tentative_parse (parser
);
15963 cp_parser_error (parser
, "expected %<,%> or %<...%>");
15964 if (!cp_parser_uncommitted_to_tentative_parse_p (parser
))
15965 cp_parser_skip_to_closing_parenthesis (parser
,
15966 /*recovering=*/true,
15967 /*or_comma=*/false,
15968 /*consume_paren=*/false);
15973 parser
->in_unbraced_linkage_specification_p
15974 = saved_in_unbraced_linkage_specification_p
;
15979 /* Parse a parameter declaration.
15981 parameter-declaration:
15982 decl-specifier-seq ... [opt] declarator
15983 decl-specifier-seq declarator = assignment-expression
15984 decl-specifier-seq ... [opt] abstract-declarator [opt]
15985 decl-specifier-seq abstract-declarator [opt] = assignment-expression
15987 If TEMPLATE_PARM_P is TRUE, then this parameter-declaration
15988 declares a template parameter. (In that case, a non-nested `>'
15989 token encountered during the parsing of the assignment-expression
15990 is not interpreted as a greater-than operator.)
15992 Returns a representation of the parameter, or NULL if an error
15993 occurs. If PARENTHESIZED_P is non-NULL, *PARENTHESIZED_P is set to
15994 true iff the declarator is of the form "(p)". */
15996 static cp_parameter_declarator
*
15997 cp_parser_parameter_declaration (cp_parser
*parser
,
15998 bool template_parm_p
,
15999 bool *parenthesized_p
)
16001 int declares_class_or_enum
;
16002 cp_decl_specifier_seq decl_specifiers
;
16003 cp_declarator
*declarator
;
16004 tree default_argument
;
16005 cp_token
*token
= NULL
, *declarator_token_start
= NULL
;
16006 const char *saved_message
;
16008 /* In a template parameter, `>' is not an operator.
16012 When parsing a default template-argument for a non-type
16013 template-parameter, the first non-nested `>' is taken as the end
16014 of the template parameter-list rather than a greater-than
16017 /* Type definitions may not appear in parameter types. */
16018 saved_message
= parser
->type_definition_forbidden_message
;
16019 parser
->type_definition_forbidden_message
16020 = G_("types may not be defined in parameter types");
16022 /* Parse the declaration-specifiers. */
16023 cp_parser_decl_specifier_seq (parser
,
16024 CP_PARSER_FLAGS_NONE
,
16026 &declares_class_or_enum
);
16028 /* Complain about missing 'typename' or other invalid type names. */
16029 if (!decl_specifiers
.any_type_specifiers_p
)
16030 cp_parser_parse_and_diagnose_invalid_type_name (parser
);
16032 /* If an error occurred, there's no reason to attempt to parse the
16033 rest of the declaration. */
16034 if (cp_parser_error_occurred (parser
))
16036 parser
->type_definition_forbidden_message
= saved_message
;
16040 /* Peek at the next token. */
16041 token
= cp_lexer_peek_token (parser
->lexer
);
16043 /* If the next token is a `)', `,', `=', `>', or `...', then there
16044 is no declarator. However, when variadic templates are enabled,
16045 there may be a declarator following `...'. */
16046 if (token
->type
== CPP_CLOSE_PAREN
16047 || token
->type
== CPP_COMMA
16048 || token
->type
== CPP_EQ
16049 || token
->type
== CPP_GREATER
)
16052 if (parenthesized_p
)
16053 *parenthesized_p
= false;
16055 /* Otherwise, there should be a declarator. */
16058 bool saved_default_arg_ok_p
= parser
->default_arg_ok_p
;
16059 parser
->default_arg_ok_p
= false;
16061 /* After seeing a decl-specifier-seq, if the next token is not a
16062 "(", there is no possibility that the code is a valid
16063 expression. Therefore, if parsing tentatively, we commit at
16065 if (!parser
->in_template_argument_list_p
16066 /* In an expression context, having seen:
16070 we cannot be sure whether we are looking at a
16071 function-type (taking a "char" as a parameter) or a cast
16072 of some object of type "char" to "int". */
16073 && !parser
->in_type_id_in_expr_p
16074 && cp_parser_uncommitted_to_tentative_parse_p (parser
)
16075 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_OPEN_PAREN
))
16076 cp_parser_commit_to_tentative_parse (parser
);
16077 /* Parse the declarator. */
16078 declarator_token_start
= token
;
16079 declarator
= cp_parser_declarator (parser
,
16080 CP_PARSER_DECLARATOR_EITHER
,
16081 /*ctor_dtor_or_conv_p=*/NULL
,
16083 /*member_p=*/false);
16084 parser
->default_arg_ok_p
= saved_default_arg_ok_p
;
16085 /* After the declarator, allow more attributes. */
16086 decl_specifiers
.attributes
16087 = chainon (decl_specifiers
.attributes
,
16088 cp_parser_attributes_opt (parser
));
16091 /* If the next token is an ellipsis, and we have not seen a
16092 declarator name, and the type of the declarator contains parameter
16093 packs but it is not a TYPE_PACK_EXPANSION, then we actually have
16094 a parameter pack expansion expression. Otherwise, leave the
16095 ellipsis for a C-style variadic function. */
16096 token
= cp_lexer_peek_token (parser
->lexer
);
16097 if (cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
16099 tree type
= decl_specifiers
.type
;
16101 if (type
&& DECL_P (type
))
16102 type
= TREE_TYPE (type
);
16105 && TREE_CODE (type
) != TYPE_PACK_EXPANSION
16106 && declarator_can_be_parameter_pack (declarator
)
16107 && (!declarator
|| !declarator
->parameter_pack_p
)
16108 && uses_parameter_packs (type
))
16110 /* Consume the `...'. */
16111 cp_lexer_consume_token (parser
->lexer
);
16112 maybe_warn_variadic_templates ();
16114 /* Build a pack expansion type */
16116 declarator
->parameter_pack_p
= true;
16118 decl_specifiers
.type
= make_pack_expansion (type
);
16122 /* The restriction on defining new types applies only to the type
16123 of the parameter, not to the default argument. */
16124 parser
->type_definition_forbidden_message
= saved_message
;
16126 /* If the next token is `=', then process a default argument. */
16127 if (cp_lexer_next_token_is (parser
->lexer
, CPP_EQ
))
16129 /* Consume the `='. */
16130 cp_lexer_consume_token (parser
->lexer
);
16132 /* If we are defining a class, then the tokens that make up the
16133 default argument must be saved and processed later. */
16134 if (!template_parm_p
&& at_class_scope_p ()
16135 && TYPE_BEING_DEFINED (current_class_type
)
16136 && !LAMBDA_TYPE_P (current_class_type
))
16138 unsigned depth
= 0;
16139 int maybe_template_id
= 0;
16140 cp_token
*first_token
;
16143 /* Add tokens until we have processed the entire default
16144 argument. We add the range [first_token, token). */
16145 first_token
= cp_lexer_peek_token (parser
->lexer
);
16150 /* Peek at the next token. */
16151 token
= cp_lexer_peek_token (parser
->lexer
);
16152 /* What we do depends on what token we have. */
16153 switch (token
->type
)
16155 /* In valid code, a default argument must be
16156 immediately followed by a `,' `)', or `...'. */
16158 if (depth
== 0 && maybe_template_id
)
16160 /* If we've seen a '<', we might be in a
16161 template-argument-list. Until Core issue 325 is
16162 resolved, we don't know how this situation ought
16163 to be handled, so try to DTRT. We check whether
16164 what comes after the comma is a valid parameter
16165 declaration list. If it is, then the comma ends
16166 the default argument; otherwise the default
16167 argument continues. */
16168 bool error
= false;
16171 /* Set ITALP so cp_parser_parameter_declaration_list
16172 doesn't decide to commit to this parse. */
16173 bool saved_italp
= parser
->in_template_argument_list_p
;
16174 parser
->in_template_argument_list_p
= true;
16176 cp_parser_parse_tentatively (parser
);
16177 cp_lexer_consume_token (parser
->lexer
);
16178 begin_scope (sk_function_parms
, NULL_TREE
);
16179 cp_parser_parameter_declaration_list (parser
, &error
);
16180 for (t
= current_binding_level
->names
; t
; t
= DECL_CHAIN (t
))
16181 pop_binding (DECL_NAME (t
), t
);
16183 if (!cp_parser_error_occurred (parser
) && !error
)
16185 cp_parser_abort_tentative_parse (parser
);
16187 parser
->in_template_argument_list_p
= saved_italp
;
16190 case CPP_CLOSE_PAREN
:
16192 /* If we run into a non-nested `;', `}', or `]',
16193 then the code is invalid -- but the default
16194 argument is certainly over. */
16195 case CPP_SEMICOLON
:
16196 case CPP_CLOSE_BRACE
:
16197 case CPP_CLOSE_SQUARE
:
16200 /* Update DEPTH, if necessary. */
16201 else if (token
->type
== CPP_CLOSE_PAREN
16202 || token
->type
== CPP_CLOSE_BRACE
16203 || token
->type
== CPP_CLOSE_SQUARE
)
16207 case CPP_OPEN_PAREN
:
16208 case CPP_OPEN_SQUARE
:
16209 case CPP_OPEN_BRACE
:
16215 /* This might be the comparison operator, or it might
16216 start a template argument list. */
16217 ++maybe_template_id
;
16221 if (cxx_dialect
== cxx98
)
16223 /* Fall through for C++0x, which treats the `>>'
16224 operator like two `>' tokens in certain
16230 /* This might be an operator, or it might close a
16231 template argument list. But if a previous '<'
16232 started a template argument list, this will have
16233 closed it, so we can't be in one anymore. */
16234 maybe_template_id
-= 1 + (token
->type
== CPP_RSHIFT
);
16235 if (maybe_template_id
< 0)
16236 maybe_template_id
= 0;
16240 /* If we run out of tokens, issue an error message. */
16242 case CPP_PRAGMA_EOL
:
16243 error_at (token
->location
, "file ends in default argument");
16249 /* In these cases, we should look for template-ids.
16250 For example, if the default argument is
16251 `X<int, double>()', we need to do name lookup to
16252 figure out whether or not `X' is a template; if
16253 so, the `,' does not end the default argument.
16255 That is not yet done. */
16262 /* If we've reached the end, stop. */
16266 /* Add the token to the token block. */
16267 token
= cp_lexer_consume_token (parser
->lexer
);
16270 /* Create a DEFAULT_ARG to represent the unparsed default
16272 default_argument
= make_node (DEFAULT_ARG
);
16273 DEFARG_TOKENS (default_argument
)
16274 = cp_token_cache_new (first_token
, token
);
16275 DEFARG_INSTANTIATIONS (default_argument
) = NULL
;
16277 /* Outside of a class definition, we can just parse the
16278 assignment-expression. */
16281 token
= cp_lexer_peek_token (parser
->lexer
);
16283 = cp_parser_default_argument (parser
, template_parm_p
);
16286 if (!parser
->default_arg_ok_p
)
16288 if (flag_permissive
)
16289 warning (0, "deprecated use of default argument for parameter of non-function");
16292 error_at (token
->location
,
16293 "default arguments are only "
16294 "permitted for function parameters");
16295 default_argument
= NULL_TREE
;
16298 else if ((declarator
&& declarator
->parameter_pack_p
)
16299 || (decl_specifiers
.type
16300 && PACK_EXPANSION_P (decl_specifiers
.type
)))
16302 /* Find the name of the parameter pack. */
16303 cp_declarator
*id_declarator
= declarator
;
16304 while (id_declarator
&& id_declarator
->kind
!= cdk_id
)
16305 id_declarator
= id_declarator
->declarator
;
16307 if (id_declarator
&& id_declarator
->kind
== cdk_id
)
16308 error_at (declarator_token_start
->location
,
16310 ? "template parameter pack %qD"
16311 " cannot have a default argument"
16312 : "parameter pack %qD cannot have a default argument",
16313 id_declarator
->u
.id
.unqualified_name
);
16315 error_at (declarator_token_start
->location
,
16317 ? "template parameter pack cannot have a default argument"
16318 : "parameter pack cannot have a default argument");
16320 default_argument
= NULL_TREE
;
16324 default_argument
= NULL_TREE
;
16326 return make_parameter_declarator (&decl_specifiers
,
16331 /* Parse a default argument and return it.
16333 TEMPLATE_PARM_P is true if this is a default argument for a
16334 non-type template parameter. */
16336 cp_parser_default_argument (cp_parser
*parser
, bool template_parm_p
)
16338 tree default_argument
= NULL_TREE
;
16339 bool saved_greater_than_is_operator_p
;
16340 bool saved_local_variables_forbidden_p
;
16342 /* Make sure that PARSER->GREATER_THAN_IS_OPERATOR_P is
16344 saved_greater_than_is_operator_p
= parser
->greater_than_is_operator_p
;
16345 parser
->greater_than_is_operator_p
= !template_parm_p
;
16346 /* Local variable names (and the `this' keyword) may not
16347 appear in a default argument. */
16348 saved_local_variables_forbidden_p
= parser
->local_variables_forbidden_p
;
16349 parser
->local_variables_forbidden_p
= true;
16350 /* Parse the assignment-expression. */
16351 if (template_parm_p
)
16352 push_deferring_access_checks (dk_no_deferred
);
16354 = cp_parser_assignment_expression (parser
, /*cast_p=*/false, NULL
);
16355 if (template_parm_p
)
16356 pop_deferring_access_checks ();
16357 parser
->greater_than_is_operator_p
= saved_greater_than_is_operator_p
;
16358 parser
->local_variables_forbidden_p
= saved_local_variables_forbidden_p
;
16360 return default_argument
;
16363 /* Parse a function-body.
16366 compound_statement */
16369 cp_parser_function_body (cp_parser
*parser
)
16371 cp_parser_compound_statement (parser
, NULL
, false);
16374 /* Parse a ctor-initializer-opt followed by a function-body. Return
16375 true if a ctor-initializer was present. */
16378 cp_parser_ctor_initializer_opt_and_function_body (cp_parser
*parser
)
16381 bool ctor_initializer_p
;
16382 const bool check_body_p
=
16383 DECL_CONSTRUCTOR_P (current_function_decl
)
16384 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
);
16387 /* Begin the function body. */
16388 body
= begin_function_body ();
16389 /* Parse the optional ctor-initializer. */
16390 ctor_initializer_p
= cp_parser_ctor_initializer_opt (parser
);
16392 /* If we're parsing a constexpr constructor definition, we need
16393 to check that the constructor body is indeed empty. However,
16394 before we get to cp_parser_function_body lot of junk has been
16395 generated, so we can't just check that we have an empty block.
16396 Rather we take a snapshot of the outermost block, and check whether
16397 cp_parser_function_body changed its state. */
16401 if (TREE_CODE (list
) == BIND_EXPR
)
16402 list
= BIND_EXPR_BODY (list
);
16403 if (TREE_CODE (list
) == STATEMENT_LIST
16404 && STATEMENT_LIST_TAIL (list
) != NULL
)
16405 last
= STATEMENT_LIST_TAIL (list
)->stmt
;
16407 /* Parse the function-body. */
16408 cp_parser_function_body (parser
);
16410 check_constexpr_ctor_body (last
, list
);
16411 /* Finish the function body. */
16412 finish_function_body (body
);
16414 return ctor_initializer_p
;
16417 /* Parse an initializer.
16420 = initializer-clause
16421 ( expression-list )
16423 Returns an expression representing the initializer. If no
16424 initializer is present, NULL_TREE is returned.
16426 *IS_DIRECT_INIT is set to FALSE if the `= initializer-clause'
16427 production is used, and TRUE otherwise. *IS_DIRECT_INIT is
16428 set to TRUE if there is no initializer present. If there is an
16429 initializer, and it is not a constant-expression, *NON_CONSTANT_P
16430 is set to true; otherwise it is set to false. */
16433 cp_parser_initializer (cp_parser
* parser
, bool* is_direct_init
,
16434 bool* non_constant_p
)
16439 /* Peek at the next token. */
16440 token
= cp_lexer_peek_token (parser
->lexer
);
16442 /* Let our caller know whether or not this initializer was
16444 *is_direct_init
= (token
->type
!= CPP_EQ
);
16445 /* Assume that the initializer is constant. */
16446 *non_constant_p
= false;
16448 if (token
->type
== CPP_EQ
)
16450 /* Consume the `='. */
16451 cp_lexer_consume_token (parser
->lexer
);
16452 /* Parse the initializer-clause. */
16453 init
= cp_parser_initializer_clause (parser
, non_constant_p
);
16455 else if (token
->type
== CPP_OPEN_PAREN
)
16458 vec
= cp_parser_parenthesized_expression_list (parser
, non_attr
,
16460 /*allow_expansion_p=*/true,
16463 return error_mark_node
;
16464 init
= build_tree_list_vec (vec
);
16465 release_tree_vector (vec
);
16467 else if (token
->type
== CPP_OPEN_BRACE
)
16469 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
16470 init
= cp_parser_braced_list (parser
, non_constant_p
);
16471 CONSTRUCTOR_IS_DIRECT_INIT (init
) = 1;
16475 /* Anything else is an error. */
16476 cp_parser_error (parser
, "expected initializer");
16477 init
= error_mark_node
;
16483 /* Parse an initializer-clause.
16485 initializer-clause:
16486 assignment-expression
16489 Returns an expression representing the initializer.
16491 If the `assignment-expression' production is used the value
16492 returned is simply a representation for the expression.
16494 Otherwise, calls cp_parser_braced_list. */
16497 cp_parser_initializer_clause (cp_parser
* parser
, bool* non_constant_p
)
16501 /* Assume the expression is constant. */
16502 *non_constant_p
= false;
16504 /* If it is not a `{', then we are looking at an
16505 assignment-expression. */
16506 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_OPEN_BRACE
))
16509 = cp_parser_constant_expression (parser
,
16510 /*allow_non_constant_p=*/true,
16512 if (!*non_constant_p
)
16514 /* We only want to fold if this is really a constant
16515 expression. FIXME Actually, we don't want to fold here, but in
16517 tree folded
= fold_non_dependent_expr (initializer
);
16518 folded
= maybe_constant_value (folded
);
16519 if (TREE_CONSTANT (folded
))
16520 initializer
= folded
;
16524 initializer
= cp_parser_braced_list (parser
, non_constant_p
);
16526 return initializer
;
16529 /* Parse a brace-enclosed initializer list.
16532 { initializer-list , [opt] }
16535 Returns a CONSTRUCTOR. The CONSTRUCTOR_ELTS will be
16536 the elements of the initializer-list (or NULL, if the last
16537 production is used). The TREE_TYPE for the CONSTRUCTOR will be
16538 NULL_TREE. There is no way to detect whether or not the optional
16539 trailing `,' was provided. NON_CONSTANT_P is as for
16540 cp_parser_initializer. */
16543 cp_parser_braced_list (cp_parser
* parser
, bool* non_constant_p
)
16547 /* Consume the `{' token. */
16548 cp_lexer_consume_token (parser
->lexer
);
16549 /* Create a CONSTRUCTOR to represent the braced-initializer. */
16550 initializer
= make_node (CONSTRUCTOR
);
16551 /* If it's not a `}', then there is a non-trivial initializer. */
16552 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_CLOSE_BRACE
))
16554 /* Parse the initializer list. */
16555 CONSTRUCTOR_ELTS (initializer
)
16556 = cp_parser_initializer_list (parser
, non_constant_p
);
16557 /* A trailing `,' token is allowed. */
16558 if (cp_lexer_next_token_is (parser
->lexer
, CPP_COMMA
))
16559 cp_lexer_consume_token (parser
->lexer
);
16561 /* Now, there should be a trailing `}'. */
16562 cp_parser_require (parser
, CPP_CLOSE_BRACE
, RT_CLOSE_BRACE
);
16563 TREE_TYPE (initializer
) = init_list_type_node
;
16564 return initializer
;
16567 /* Parse an initializer-list.
16570 initializer-clause ... [opt]
16571 initializer-list , initializer-clause ... [opt]
16576 identifier : initializer-clause
16577 initializer-list, identifier : initializer-clause
16579 Returns a VEC of constructor_elt. The VALUE of each elt is an expression
16580 for the initializer. If the INDEX of the elt is non-NULL, it is the
16581 IDENTIFIER_NODE naming the field to initialize. NON_CONSTANT_P is
16582 as for cp_parser_initializer. */
16584 static VEC(constructor_elt
,gc
) *
16585 cp_parser_initializer_list (cp_parser
* parser
, bool* non_constant_p
)
16587 VEC(constructor_elt
,gc
) *v
= NULL
;
16589 /* Assume all of the expressions are constant. */
16590 *non_constant_p
= false;
16592 /* Parse the rest of the list. */
16598 bool clause_non_constant_p
;
16600 /* If the next token is an identifier and the following one is a
16601 colon, we are looking at the GNU designated-initializer
16603 if (cp_parser_allow_gnu_extensions_p (parser
)
16604 && cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
)
16605 && cp_lexer_peek_nth_token (parser
->lexer
, 2)->type
== CPP_COLON
)
16607 /* Warn the user that they are using an extension. */
16608 pedwarn (input_location
, OPT_pedantic
,
16609 "ISO C++ does not allow designated initializers");
16610 /* Consume the identifier. */
16611 identifier
= cp_lexer_consume_token (parser
->lexer
)->u
.value
;
16612 /* Consume the `:'. */
16613 cp_lexer_consume_token (parser
->lexer
);
16616 identifier
= NULL_TREE
;
16618 /* Parse the initializer. */
16619 initializer
= cp_parser_initializer_clause (parser
,
16620 &clause_non_constant_p
);
16621 /* If any clause is non-constant, so is the entire initializer. */
16622 if (clause_non_constant_p
)
16623 *non_constant_p
= true;
16625 /* If we have an ellipsis, this is an initializer pack
16627 if (cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
16629 /* Consume the `...'. */
16630 cp_lexer_consume_token (parser
->lexer
);
16632 /* Turn the initializer into an initializer expansion. */
16633 initializer
= make_pack_expansion (initializer
);
16636 /* Add it to the vector. */
16637 CONSTRUCTOR_APPEND_ELT(v
, identifier
, initializer
);
16639 /* If the next token is not a comma, we have reached the end of
16641 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COMMA
))
16644 /* Peek at the next token. */
16645 token
= cp_lexer_peek_nth_token (parser
->lexer
, 2);
16646 /* If the next token is a `}', then we're still done. An
16647 initializer-clause can have a trailing `,' after the
16648 initializer-list and before the closing `}'. */
16649 if (token
->type
== CPP_CLOSE_BRACE
)
16652 /* Consume the `,' token. */
16653 cp_lexer_consume_token (parser
->lexer
);
16659 /* Classes [gram.class] */
16661 /* Parse a class-name.
16667 TYPENAME_KEYWORD_P is true iff the `typename' keyword has been used
16668 to indicate that names looked up in dependent types should be
16669 assumed to be types. TEMPLATE_KEYWORD_P is true iff the `template'
16670 keyword has been used to indicate that the name that appears next
16671 is a template. TAG_TYPE indicates the explicit tag given before
16672 the type name, if any. If CHECK_DEPENDENCY_P is FALSE, names are
16673 looked up in dependent scopes. If CLASS_HEAD_P is TRUE, this class
16674 is the class being defined in a class-head.
16676 Returns the TYPE_DECL representing the class. */
16679 cp_parser_class_name (cp_parser
*parser
,
16680 bool typename_keyword_p
,
16681 bool template_keyword_p
,
16682 enum tag_types tag_type
,
16683 bool check_dependency_p
,
16685 bool is_declaration
)
16691 tree identifier
= NULL_TREE
;
16693 /* All class-names start with an identifier. */
16694 token
= cp_lexer_peek_token (parser
->lexer
);
16695 if (token
->type
!= CPP_NAME
&& token
->type
!= CPP_TEMPLATE_ID
)
16697 cp_parser_error (parser
, "expected class-name");
16698 return error_mark_node
;
16701 /* PARSER->SCOPE can be cleared when parsing the template-arguments
16702 to a template-id, so we save it here. */
16703 scope
= parser
->scope
;
16704 if (scope
== error_mark_node
)
16705 return error_mark_node
;
16707 /* Any name names a type if we're following the `typename' keyword
16708 in a qualified name where the enclosing scope is type-dependent. */
16709 typename_p
= (typename_keyword_p
&& scope
&& TYPE_P (scope
)
16710 && dependent_type_p (scope
));
16711 /* Handle the common case (an identifier, but not a template-id)
16713 if (token
->type
== CPP_NAME
16714 && !cp_parser_nth_token_starts_template_argument_list_p (parser
, 2))
16716 cp_token
*identifier_token
;
16719 /* Look for the identifier. */
16720 identifier_token
= cp_lexer_peek_token (parser
->lexer
);
16721 ambiguous_p
= identifier_token
->ambiguous_p
;
16722 identifier
= cp_parser_identifier (parser
);
16723 /* If the next token isn't an identifier, we are certainly not
16724 looking at a class-name. */
16725 if (identifier
== error_mark_node
)
16726 decl
= error_mark_node
;
16727 /* If we know this is a type-name, there's no need to look it
16729 else if (typename_p
)
16733 tree ambiguous_decls
;
16734 /* If we already know that this lookup is ambiguous, then
16735 we've already issued an error message; there's no reason
16739 cp_parser_simulate_error (parser
);
16740 return error_mark_node
;
16742 /* If the next token is a `::', then the name must be a type
16745 [basic.lookup.qual]
16747 During the lookup for a name preceding the :: scope
16748 resolution operator, object, function, and enumerator
16749 names are ignored. */
16750 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SCOPE
))
16751 tag_type
= typename_type
;
16752 /* Look up the name. */
16753 decl
= cp_parser_lookup_name (parser
, identifier
,
16755 /*is_template=*/false,
16756 /*is_namespace=*/false,
16757 check_dependency_p
,
16759 identifier_token
->location
);
16760 if (ambiguous_decls
)
16762 if (cp_parser_parsing_tentatively (parser
))
16763 cp_parser_simulate_error (parser
);
16764 return error_mark_node
;
16770 /* Try a template-id. */
16771 decl
= cp_parser_template_id (parser
, template_keyword_p
,
16772 check_dependency_p
,
16774 if (decl
== error_mark_node
)
16775 return error_mark_node
;
16778 decl
= cp_parser_maybe_treat_template_as_class (decl
, class_head_p
);
16780 /* If this is a typename, create a TYPENAME_TYPE. */
16781 if (typename_p
&& decl
!= error_mark_node
)
16783 decl
= make_typename_type (scope
, decl
, typename_type
,
16784 /*complain=*/tf_error
);
16785 if (decl
!= error_mark_node
)
16786 decl
= TYPE_NAME (decl
);
16789 /* Check to see that it is really the name of a class. */
16790 if (TREE_CODE (decl
) == TEMPLATE_ID_EXPR
16791 && TREE_CODE (TREE_OPERAND (decl
, 0)) == IDENTIFIER_NODE
16792 && cp_lexer_next_token_is (parser
->lexer
, CPP_SCOPE
))
16793 /* Situations like this:
16795 template <typename T> struct A {
16796 typename T::template X<int>::I i;
16799 are problematic. Is `T::template X<int>' a class-name? The
16800 standard does not seem to be definitive, but there is no other
16801 valid interpretation of the following `::'. Therefore, those
16802 names are considered class-names. */
16804 decl
= make_typename_type (scope
, decl
, tag_type
, tf_error
);
16805 if (decl
!= error_mark_node
)
16806 decl
= TYPE_NAME (decl
);
16808 else if (TREE_CODE (decl
) != TYPE_DECL
16809 || TREE_TYPE (decl
) == error_mark_node
16810 || !MAYBE_CLASS_TYPE_P (TREE_TYPE (decl
))
16811 /* In Objective-C 2.0, a classname followed by '.' starts a
16812 dot-syntax expression, and it's not a type-name. */
16813 || (c_dialect_objc ()
16814 && cp_lexer_peek_token (parser
->lexer
)->type
== CPP_DOT
16815 && objc_is_class_name (decl
)))
16816 decl
= error_mark_node
;
16818 if (decl
== error_mark_node
)
16819 cp_parser_error (parser
, "expected class-name");
16820 else if (identifier
&& !parser
->scope
)
16821 maybe_note_name_used_in_class (identifier
, decl
);
16826 /* Parse a class-specifier.
16829 class-head { member-specification [opt] }
16831 Returns the TREE_TYPE representing the class. */
16834 cp_parser_class_specifier (cp_parser
* parser
)
16837 tree attributes
= NULL_TREE
;
16838 bool nested_name_specifier_p
;
16839 unsigned saved_num_template_parameter_lists
;
16840 bool saved_in_function_body
;
16841 bool saved_in_unbraced_linkage_specification_p
;
16842 tree old_scope
= NULL_TREE
;
16843 tree scope
= NULL_TREE
;
16846 push_deferring_access_checks (dk_no_deferred
);
16848 /* Parse the class-head. */
16849 type
= cp_parser_class_head (parser
,
16850 &nested_name_specifier_p
,
16853 /* If the class-head was a semantic disaster, skip the entire body
16857 cp_parser_skip_to_end_of_block_or_statement (parser
);
16858 pop_deferring_access_checks ();
16859 return error_mark_node
;
16862 /* Look for the `{'. */
16863 if (!cp_parser_require (parser
, CPP_OPEN_BRACE
, RT_OPEN_BRACE
))
16865 pop_deferring_access_checks ();
16866 return error_mark_node
;
16869 /* Process the base classes. If they're invalid, skip the
16870 entire class body. */
16871 if (!xref_basetypes (type
, bases
))
16873 /* Consuming the closing brace yields better error messages
16875 if (cp_parser_skip_to_closing_brace (parser
))
16876 cp_lexer_consume_token (parser
->lexer
);
16877 pop_deferring_access_checks ();
16878 return error_mark_node
;
16881 /* Issue an error message if type-definitions are forbidden here. */
16882 cp_parser_check_type_definition (parser
);
16883 /* Remember that we are defining one more class. */
16884 ++parser
->num_classes_being_defined
;
16885 /* Inside the class, surrounding template-parameter-lists do not
16887 saved_num_template_parameter_lists
16888 = parser
->num_template_parameter_lists
;
16889 parser
->num_template_parameter_lists
= 0;
16890 /* We are not in a function body. */
16891 saved_in_function_body
= parser
->in_function_body
;
16892 parser
->in_function_body
= false;
16893 /* We are not immediately inside an extern "lang" block. */
16894 saved_in_unbraced_linkage_specification_p
16895 = parser
->in_unbraced_linkage_specification_p
;
16896 parser
->in_unbraced_linkage_specification_p
= false;
16898 /* Start the class. */
16899 if (nested_name_specifier_p
)
16901 scope
= CP_DECL_CONTEXT (TYPE_MAIN_DECL (type
));
16902 old_scope
= push_inner_scope (scope
);
16904 type
= begin_class_definition (type
, attributes
);
16906 if (type
== error_mark_node
)
16907 /* If the type is erroneous, skip the entire body of the class. */
16908 cp_parser_skip_to_closing_brace (parser
);
16910 /* Parse the member-specification. */
16911 cp_parser_member_specification_opt (parser
);
16913 /* Look for the trailing `}'. */
16914 cp_parser_require (parser
, CPP_CLOSE_BRACE
, RT_CLOSE_BRACE
);
16915 /* Look for trailing attributes to apply to this class. */
16916 if (cp_parser_allow_gnu_extensions_p (parser
))
16917 attributes
= cp_parser_attributes_opt (parser
);
16918 if (type
!= error_mark_node
)
16919 type
= finish_struct (type
, attributes
);
16920 if (nested_name_specifier_p
)
16921 pop_inner_scope (old_scope
, scope
);
16923 /* We've finished a type definition. Check for the common syntax
16924 error of forgetting a semicolon after the definition. We need to
16925 be careful, as we can't just check for not-a-semicolon and be done
16926 with it; the user might have typed:
16928 class X { } c = ...;
16929 class X { } *p = ...;
16931 and so forth. Instead, enumerate all the possible tokens that
16932 might follow this production; if we don't see one of them, then
16933 complain and silently insert the semicolon. */
16935 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
16936 bool want_semicolon
= true;
16938 switch (token
->type
)
16941 case CPP_SEMICOLON
:
16944 case CPP_OPEN_PAREN
:
16945 case CPP_CLOSE_PAREN
:
16947 want_semicolon
= false;
16950 /* While it's legal for type qualifiers and storage class
16951 specifiers to follow type definitions in the grammar, only
16952 compiler testsuites contain code like that. Assume that if
16953 we see such code, then what we're really seeing is a case
16957 const <type> var = ...;
16962 static <type> func (...) ...
16964 i.e. the qualifier or specifier applies to the next
16965 declaration. To do so, however, we need to look ahead one
16966 more token to see if *that* token is a type specifier.
16968 This code could be improved to handle:
16971 static const <type> var = ...; */
16973 if (keyword_is_storage_class_specifier (token
->keyword
)
16974 || keyword_is_type_qualifier (token
->keyword
))
16976 cp_token
*lookahead
= cp_lexer_peek_nth_token (parser
->lexer
, 2);
16978 if (lookahead
->type
== CPP_KEYWORD
16979 && !keyword_begins_type_specifier (lookahead
->keyword
))
16980 want_semicolon
= false;
16981 else if (lookahead
->type
== CPP_NAME
)
16982 /* Handling user-defined types here would be nice, but
16984 want_semicolon
= false;
16991 /* If we don't have a type, then something is very wrong and we
16992 shouldn't try to do anything clever. */
16993 if (TYPE_P (type
) && want_semicolon
)
16995 cp_token_position prev
16996 = cp_lexer_previous_token_position (parser
->lexer
);
16997 cp_token
*prev_token
= cp_lexer_token_at (parser
->lexer
, prev
);
16998 location_t loc
= prev_token
->location
;
17000 if (CLASSTYPE_DECLARED_CLASS (type
))
17001 error_at (loc
, "expected %<;%> after class definition");
17002 else if (TREE_CODE (type
) == RECORD_TYPE
)
17003 error_at (loc
, "expected %<;%> after struct definition");
17004 else if (TREE_CODE (type
) == UNION_TYPE
)
17005 error_at (loc
, "expected %<;%> after union definition");
17007 gcc_unreachable ();
17009 /* Unget one token and smash it to look as though we encountered
17010 a semicolon in the input stream. */
17011 cp_lexer_set_token_position (parser
->lexer
, prev
);
17012 token
= cp_lexer_peek_token (parser
->lexer
);
17013 token
->type
= CPP_SEMICOLON
;
17014 token
->keyword
= RID_MAX
;
17018 /* If this class is not itself within the scope of another class,
17019 then we need to parse the bodies of all of the queued function
17020 definitions. Note that the queued functions defined in a class
17021 are not always processed immediately following the
17022 class-specifier for that class. Consider:
17025 struct B { void f() { sizeof (A); } };
17028 If `f' were processed before the processing of `A' were
17029 completed, there would be no way to compute the size of `A'.
17030 Note that the nesting we are interested in here is lexical --
17031 not the semantic nesting given by TYPE_CONTEXT. In particular,
17034 struct A { struct B; };
17035 struct A::B { void f() { } };
17037 there is no need to delay the parsing of `A::B::f'. */
17038 if (--parser
->num_classes_being_defined
== 0)
17041 tree class_type
= NULL_TREE
;
17042 tree pushed_scope
= NULL_TREE
;
17044 cp_default_arg_entry
*e
;
17046 /* In a first pass, parse default arguments to the functions.
17047 Then, in a second pass, parse the bodies of the functions.
17048 This two-phased approach handles cases like:
17056 FOR_EACH_VEC_ELT (cp_default_arg_entry
, unparsed_funs_with_default_args
,
17060 /* If there are default arguments that have not yet been processed,
17061 take care of them now. */
17062 if (class_type
!= e
->class_type
)
17065 pop_scope (pushed_scope
);
17066 class_type
= e
->class_type
;
17067 pushed_scope
= push_scope (class_type
);
17069 /* Make sure that any template parameters are in scope. */
17070 maybe_begin_member_template_processing (fn
);
17071 /* Parse the default argument expressions. */
17072 cp_parser_late_parsing_default_args (parser
, fn
);
17073 /* Remove any template parameters from the symbol table. */
17074 maybe_end_member_template_processing ();
17077 pop_scope (pushed_scope
);
17078 VEC_truncate (cp_default_arg_entry
, unparsed_funs_with_default_args
, 0);
17079 /* Now parse the body of the functions. */
17080 FOR_EACH_VEC_ELT (tree
, unparsed_funs_with_definitions
, ix
, fn
)
17081 cp_parser_late_parsing_for_member (parser
, fn
);
17082 VEC_truncate (tree
, unparsed_funs_with_definitions
, 0);
17085 /* Put back any saved access checks. */
17086 pop_deferring_access_checks ();
17088 /* Restore saved state. */
17089 parser
->in_function_body
= saved_in_function_body
;
17090 parser
->num_template_parameter_lists
17091 = saved_num_template_parameter_lists
;
17092 parser
->in_unbraced_linkage_specification_p
17093 = saved_in_unbraced_linkage_specification_p
;
17098 /* Parse a class-head.
17101 class-key identifier [opt] base-clause [opt]
17102 class-key nested-name-specifier identifier base-clause [opt]
17103 class-key nested-name-specifier [opt] template-id
17107 class-key attributes identifier [opt] base-clause [opt]
17108 class-key attributes nested-name-specifier identifier base-clause [opt]
17109 class-key attributes nested-name-specifier [opt] template-id
17112 Upon return BASES is initialized to the list of base classes (or
17113 NULL, if there are none) in the same form returned by
17114 cp_parser_base_clause.
17116 Returns the TYPE of the indicated class. Sets
17117 *NESTED_NAME_SPECIFIER_P to TRUE iff one of the productions
17118 involving a nested-name-specifier was used, and FALSE otherwise.
17120 Returns error_mark_node if this is not a class-head.
17122 Returns NULL_TREE if the class-head is syntactically valid, but
17123 semantically invalid in a way that means we should skip the entire
17124 body of the class. */
17127 cp_parser_class_head (cp_parser
* parser
,
17128 bool* nested_name_specifier_p
,
17129 tree
*attributes_p
,
17132 tree nested_name_specifier
;
17133 enum tag_types class_key
;
17134 tree id
= NULL_TREE
;
17135 tree type
= NULL_TREE
;
17137 bool template_id_p
= false;
17138 bool qualified_p
= false;
17139 bool invalid_nested_name_p
= false;
17140 bool invalid_explicit_specialization_p
= false;
17141 bool saved_colon_corrects_to_scope_p
= parser
->colon_corrects_to_scope_p
;
17142 tree pushed_scope
= NULL_TREE
;
17143 unsigned num_templates
;
17144 cp_token
*type_start_token
= NULL
, *nested_name_specifier_token_start
= NULL
;
17145 /* Assume no nested-name-specifier will be present. */
17146 *nested_name_specifier_p
= false;
17147 /* Assume no template parameter lists will be used in defining the
17150 parser
->colon_corrects_to_scope_p
= false;
17152 *bases
= NULL_TREE
;
17154 /* Look for the class-key. */
17155 class_key
= cp_parser_class_key (parser
);
17156 if (class_key
== none_type
)
17157 return error_mark_node
;
17159 /* Parse the attributes. */
17160 attributes
= cp_parser_attributes_opt (parser
);
17162 /* If the next token is `::', that is invalid -- but sometimes
17163 people do try to write:
17167 Handle this gracefully by accepting the extra qualifier, and then
17168 issuing an error about it later if this really is a
17169 class-head. If it turns out just to be an elaborated type
17170 specifier, remain silent. */
17171 if (cp_parser_global_scope_opt (parser
, /*current_scope_valid_p=*/false))
17172 qualified_p
= true;
17174 push_deferring_access_checks (dk_no_check
);
17176 /* Determine the name of the class. Begin by looking for an
17177 optional nested-name-specifier. */
17178 nested_name_specifier_token_start
= cp_lexer_peek_token (parser
->lexer
);
17179 nested_name_specifier
17180 = cp_parser_nested_name_specifier_opt (parser
,
17181 /*typename_keyword_p=*/false,
17182 /*check_dependency_p=*/false,
17184 /*is_declaration=*/false);
17185 /* If there was a nested-name-specifier, then there *must* be an
17187 if (nested_name_specifier
)
17189 type_start_token
= cp_lexer_peek_token (parser
->lexer
);
17190 /* Although the grammar says `identifier', it really means
17191 `class-name' or `template-name'. You are only allowed to
17192 define a class that has already been declared with this
17195 The proposed resolution for Core Issue 180 says that wherever
17196 you see `class T::X' you should treat `X' as a type-name.
17198 It is OK to define an inaccessible class; for example:
17200 class A { class B; };
17203 We do not know if we will see a class-name, or a
17204 template-name. We look for a class-name first, in case the
17205 class-name is a template-id; if we looked for the
17206 template-name first we would stop after the template-name. */
17207 cp_parser_parse_tentatively (parser
);
17208 type
= cp_parser_class_name (parser
,
17209 /*typename_keyword_p=*/false,
17210 /*template_keyword_p=*/false,
17212 /*check_dependency_p=*/false,
17213 /*class_head_p=*/true,
17214 /*is_declaration=*/false);
17215 /* If that didn't work, ignore the nested-name-specifier. */
17216 if (!cp_parser_parse_definitely (parser
))
17218 invalid_nested_name_p
= true;
17219 type_start_token
= cp_lexer_peek_token (parser
->lexer
);
17220 id
= cp_parser_identifier (parser
);
17221 if (id
== error_mark_node
)
17224 /* If we could not find a corresponding TYPE, treat this
17225 declaration like an unqualified declaration. */
17226 if (type
== error_mark_node
)
17227 nested_name_specifier
= NULL_TREE
;
17228 /* Otherwise, count the number of templates used in TYPE and its
17229 containing scopes. */
17234 for (scope
= TREE_TYPE (type
);
17235 scope
&& TREE_CODE (scope
) != NAMESPACE_DECL
;
17236 scope
= (TYPE_P (scope
)
17237 ? TYPE_CONTEXT (scope
)
17238 : DECL_CONTEXT (scope
)))
17240 && CLASS_TYPE_P (scope
)
17241 && CLASSTYPE_TEMPLATE_INFO (scope
)
17242 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (scope
))
17243 && !CLASSTYPE_TEMPLATE_SPECIALIZATION (scope
))
17247 /* Otherwise, the identifier is optional. */
17250 /* We don't know whether what comes next is a template-id,
17251 an identifier, or nothing at all. */
17252 cp_parser_parse_tentatively (parser
);
17253 /* Check for a template-id. */
17254 type_start_token
= cp_lexer_peek_token (parser
->lexer
);
17255 id
= cp_parser_template_id (parser
,
17256 /*template_keyword_p=*/false,
17257 /*check_dependency_p=*/true,
17258 /*is_declaration=*/true);
17259 /* If that didn't work, it could still be an identifier. */
17260 if (!cp_parser_parse_definitely (parser
))
17262 if (cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
))
17264 type_start_token
= cp_lexer_peek_token (parser
->lexer
);
17265 id
= cp_parser_identifier (parser
);
17272 template_id_p
= true;
17277 pop_deferring_access_checks ();
17280 cp_parser_check_for_invalid_template_id (parser
, id
,
17281 type_start_token
->location
);
17283 /* If it's not a `:' or a `{' then we can't really be looking at a
17284 class-head, since a class-head only appears as part of a
17285 class-specifier. We have to detect this situation before calling
17286 xref_tag, since that has irreversible side-effects. */
17287 if (!cp_parser_next_token_starts_class_definition_p (parser
))
17289 cp_parser_error (parser
, "expected %<{%> or %<:%>");
17290 type
= error_mark_node
;
17294 /* At this point, we're going ahead with the class-specifier, even
17295 if some other problem occurs. */
17296 cp_parser_commit_to_tentative_parse (parser
);
17297 /* Issue the error about the overly-qualified name now. */
17300 cp_parser_error (parser
,
17301 "global qualification of class name is invalid");
17302 type
= error_mark_node
;
17305 else if (invalid_nested_name_p
)
17307 cp_parser_error (parser
,
17308 "qualified name does not name a class");
17309 type
= error_mark_node
;
17312 else if (nested_name_specifier
)
17316 /* Reject typedef-names in class heads. */
17317 if (!DECL_IMPLICIT_TYPEDEF_P (type
))
17319 error_at (type_start_token
->location
,
17320 "invalid class name in declaration of %qD",
17326 /* Figure out in what scope the declaration is being placed. */
17327 scope
= current_scope ();
17328 /* If that scope does not contain the scope in which the
17329 class was originally declared, the program is invalid. */
17330 if (scope
&& !is_ancestor (scope
, nested_name_specifier
))
17332 if (at_namespace_scope_p ())
17333 error_at (type_start_token
->location
,
17334 "declaration of %qD in namespace %qD which does not "
17336 type
, scope
, nested_name_specifier
);
17338 error_at (type_start_token
->location
,
17339 "declaration of %qD in %qD which does not enclose %qD",
17340 type
, scope
, nested_name_specifier
);
17346 A declarator-id shall not be qualified except for the
17347 definition of a ... nested class outside of its class
17348 ... [or] the definition or explicit instantiation of a
17349 class member of a namespace outside of its namespace. */
17350 if (scope
== nested_name_specifier
)
17352 permerror (nested_name_specifier_token_start
->location
,
17353 "extra qualification not allowed");
17354 nested_name_specifier
= NULL_TREE
;
17358 /* An explicit-specialization must be preceded by "template <>". If
17359 it is not, try to recover gracefully. */
17360 if (at_namespace_scope_p ()
17361 && parser
->num_template_parameter_lists
== 0
17364 error_at (type_start_token
->location
,
17365 "an explicit specialization must be preceded by %<template <>%>");
17366 invalid_explicit_specialization_p
= true;
17367 /* Take the same action that would have been taken by
17368 cp_parser_explicit_specialization. */
17369 ++parser
->num_template_parameter_lists
;
17370 begin_specialization ();
17372 /* There must be no "return" statements between this point and the
17373 end of this function; set "type "to the correct return value and
17374 use "goto done;" to return. */
17375 /* Make sure that the right number of template parameters were
17377 if (!cp_parser_check_template_parameters (parser
, num_templates
,
17378 type_start_token
->location
,
17379 /*declarator=*/NULL
))
17381 /* If something went wrong, there is no point in even trying to
17382 process the class-definition. */
17387 /* Look up the type. */
17390 if (TREE_CODE (id
) == TEMPLATE_ID_EXPR
17391 && (DECL_FUNCTION_TEMPLATE_P (TREE_OPERAND (id
, 0))
17392 || TREE_CODE (TREE_OPERAND (id
, 0)) == OVERLOAD
))
17394 error_at (type_start_token
->location
,
17395 "function template %qD redeclared as a class template", id
);
17396 type
= error_mark_node
;
17400 type
= TREE_TYPE (id
);
17401 type
= maybe_process_partial_specialization (type
);
17403 if (nested_name_specifier
)
17404 pushed_scope
= push_scope (nested_name_specifier
);
17406 else if (nested_name_specifier
)
17412 template <typename T> struct S { struct T };
17413 template <typename T> struct S<T>::T { };
17415 we will get a TYPENAME_TYPE when processing the definition of
17416 `S::T'. We need to resolve it to the actual type before we
17417 try to define it. */
17418 if (TREE_CODE (TREE_TYPE (type
)) == TYPENAME_TYPE
)
17420 class_type
= resolve_typename_type (TREE_TYPE (type
),
17421 /*only_current_p=*/false);
17422 if (TREE_CODE (class_type
) != TYPENAME_TYPE
)
17423 type
= TYPE_NAME (class_type
);
17426 cp_parser_error (parser
, "could not resolve typename type");
17427 type
= error_mark_node
;
17431 if (maybe_process_partial_specialization (TREE_TYPE (type
))
17432 == error_mark_node
)
17438 class_type
= current_class_type
;
17439 /* Enter the scope indicated by the nested-name-specifier. */
17440 pushed_scope
= push_scope (nested_name_specifier
);
17441 /* Get the canonical version of this type. */
17442 type
= TYPE_MAIN_DECL (TREE_TYPE (type
));
17443 if (PROCESSING_REAL_TEMPLATE_DECL_P ()
17444 && !CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_TYPE (type
)))
17446 type
= push_template_decl (type
);
17447 if (type
== error_mark_node
)
17454 type
= TREE_TYPE (type
);
17455 *nested_name_specifier_p
= true;
17457 else /* The name is not a nested name. */
17459 /* If the class was unnamed, create a dummy name. */
17461 id
= make_anon_name ();
17462 type
= xref_tag (class_key
, id
, /*tag_scope=*/ts_current
,
17463 parser
->num_template_parameter_lists
);
17466 /* Indicate whether this class was declared as a `class' or as a
17468 if (TREE_CODE (type
) == RECORD_TYPE
)
17469 CLASSTYPE_DECLARED_CLASS (type
) = (class_key
== class_type
);
17470 cp_parser_check_class_key (class_key
, type
);
17472 /* If this type was already complete, and we see another definition,
17473 that's an error. */
17474 if (type
!= error_mark_node
&& COMPLETE_TYPE_P (type
))
17476 error_at (type_start_token
->location
, "redefinition of %q#T",
17478 error_at (type_start_token
->location
, "previous definition of %q+#T",
17483 else if (type
== error_mark_node
)
17486 /* We will have entered the scope containing the class; the names of
17487 base classes should be looked up in that context. For example:
17489 struct A { struct B {}; struct C; };
17490 struct A::C : B {};
17494 /* Get the list of base-classes, if there is one. */
17495 if (cp_lexer_next_token_is (parser
->lexer
, CPP_COLON
))
17496 *bases
= cp_parser_base_clause (parser
);
17499 /* Leave the scope given by the nested-name-specifier. We will
17500 enter the class scope itself while processing the members. */
17502 pop_scope (pushed_scope
);
17504 if (invalid_explicit_specialization_p
)
17506 end_specialization ();
17507 --parser
->num_template_parameter_lists
;
17511 DECL_SOURCE_LOCATION (TYPE_NAME (type
)) = type_start_token
->location
;
17512 *attributes_p
= attributes
;
17514 parser
->colon_corrects_to_scope_p
= saved_colon_corrects_to_scope_p
;
17518 /* Parse a class-key.
17525 Returns the kind of class-key specified, or none_type to indicate
17528 static enum tag_types
17529 cp_parser_class_key (cp_parser
* parser
)
17532 enum tag_types tag_type
;
17534 /* Look for the class-key. */
17535 token
= cp_parser_require (parser
, CPP_KEYWORD
, RT_CLASS_KEY
);
17539 /* Check to see if the TOKEN is a class-key. */
17540 tag_type
= cp_parser_token_is_class_key (token
);
17542 cp_parser_error (parser
, "expected class-key");
17546 /* Parse an (optional) member-specification.
17548 member-specification:
17549 member-declaration member-specification [opt]
17550 access-specifier : member-specification [opt] */
17553 cp_parser_member_specification_opt (cp_parser
* parser
)
17560 /* Peek at the next token. */
17561 token
= cp_lexer_peek_token (parser
->lexer
);
17562 /* If it's a `}', or EOF then we've seen all the members. */
17563 if (token
->type
== CPP_CLOSE_BRACE
17564 || token
->type
== CPP_EOF
17565 || token
->type
== CPP_PRAGMA_EOL
)
17568 /* See if this token is a keyword. */
17569 keyword
= token
->keyword
;
17573 case RID_PROTECTED
:
17575 /* Consume the access-specifier. */
17576 cp_lexer_consume_token (parser
->lexer
);
17577 /* Remember which access-specifier is active. */
17578 current_access_specifier
= token
->u
.value
;
17579 /* Look for the `:'. */
17580 cp_parser_require (parser
, CPP_COLON
, RT_COLON
);
17584 /* Accept #pragmas at class scope. */
17585 if (token
->type
== CPP_PRAGMA
)
17587 cp_parser_pragma (parser
, pragma_external
);
17591 /* Otherwise, the next construction must be a
17592 member-declaration. */
17593 cp_parser_member_declaration (parser
);
17598 /* Parse a member-declaration.
17600 member-declaration:
17601 decl-specifier-seq [opt] member-declarator-list [opt] ;
17602 function-definition ; [opt]
17603 :: [opt] nested-name-specifier template [opt] unqualified-id ;
17605 template-declaration
17607 member-declarator-list:
17609 member-declarator-list , member-declarator
17612 declarator pure-specifier [opt]
17613 declarator constant-initializer [opt]
17614 identifier [opt] : constant-expression
17618 member-declaration:
17619 __extension__ member-declaration
17622 declarator attributes [opt] pure-specifier [opt]
17623 declarator attributes [opt] constant-initializer [opt]
17624 identifier [opt] attributes [opt] : constant-expression
17628 member-declaration:
17629 static_assert-declaration */
17632 cp_parser_member_declaration (cp_parser
* parser
)
17634 cp_decl_specifier_seq decl_specifiers
;
17635 tree prefix_attributes
;
17637 int declares_class_or_enum
;
17639 cp_token
*token
= NULL
;
17640 cp_token
*decl_spec_token_start
= NULL
;
17641 cp_token
*initializer_token_start
= NULL
;
17642 int saved_pedantic
;
17643 bool saved_colon_corrects_to_scope_p
= parser
->colon_corrects_to_scope_p
;
17645 /* Check for the `__extension__' keyword. */
17646 if (cp_parser_extension_opt (parser
, &saved_pedantic
))
17649 cp_parser_member_declaration (parser
);
17650 /* Restore the old value of the PEDANTIC flag. */
17651 pedantic
= saved_pedantic
;
17656 /* Check for a template-declaration. */
17657 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_TEMPLATE
))
17659 /* An explicit specialization here is an error condition, and we
17660 expect the specialization handler to detect and report this. */
17661 if (cp_lexer_peek_nth_token (parser
->lexer
, 2)->type
== CPP_LESS
17662 && cp_lexer_peek_nth_token (parser
->lexer
, 3)->type
== CPP_GREATER
)
17663 cp_parser_explicit_specialization (parser
);
17665 cp_parser_template_declaration (parser
, /*member_p=*/true);
17670 /* Check for a using-declaration. */
17671 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_USING
))
17673 /* Parse the using-declaration. */
17674 cp_parser_using_declaration (parser
,
17675 /*access_declaration_p=*/false);
17679 /* Check for @defs. */
17680 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_AT_DEFS
))
17683 tree ivar_chains
= cp_parser_objc_defs_expression (parser
);
17684 ivar
= ivar_chains
;
17688 ivar
= TREE_CHAIN (member
);
17689 TREE_CHAIN (member
) = NULL_TREE
;
17690 finish_member_declaration (member
);
17695 /* If the next token is `static_assert' we have a static assertion. */
17696 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_STATIC_ASSERT
))
17698 cp_parser_static_assert (parser
, /*member_p=*/true);
17702 parser
->colon_corrects_to_scope_p
= false;
17704 if (cp_parser_using_declaration (parser
, /*access_declaration=*/true))
17707 /* Parse the decl-specifier-seq. */
17708 decl_spec_token_start
= cp_lexer_peek_token (parser
->lexer
);
17709 cp_parser_decl_specifier_seq (parser
,
17710 CP_PARSER_FLAGS_OPTIONAL
,
17712 &declares_class_or_enum
);
17713 prefix_attributes
= decl_specifiers
.attributes
;
17714 decl_specifiers
.attributes
= NULL_TREE
;
17715 /* Check for an invalid type-name. */
17716 if (!decl_specifiers
.any_type_specifiers_p
17717 && cp_parser_parse_and_diagnose_invalid_type_name (parser
))
17719 /* If there is no declarator, then the decl-specifier-seq should
17721 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
17723 /* If there was no decl-specifier-seq, and the next token is a
17724 `;', then we have something like:
17730 Each member-declaration shall declare at least one member
17731 name of the class. */
17732 if (!decl_specifiers
.any_specifiers_p
)
17734 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
17735 if (!in_system_header_at (token
->location
))
17736 pedwarn (token
->location
, OPT_pedantic
, "extra %<;%>");
17742 /* See if this declaration is a friend. */
17743 friend_p
= cp_parser_friend_p (&decl_specifiers
);
17744 /* If there were decl-specifiers, check to see if there was
17745 a class-declaration. */
17746 type
= check_tag_decl (&decl_specifiers
);
17747 /* Nested classes have already been added to the class, but
17748 a `friend' needs to be explicitly registered. */
17751 /* If the `friend' keyword was present, the friend must
17752 be introduced with a class-key. */
17753 if (!declares_class_or_enum
)
17754 error_at (decl_spec_token_start
->location
,
17755 "a class-key must be used when declaring a friend");
17758 template <typename T> struct A {
17759 friend struct A<T>::B;
17762 A<T>::B will be represented by a TYPENAME_TYPE, and
17763 therefore not recognized by check_tag_decl. */
17765 && decl_specifiers
.type
17766 && TYPE_P (decl_specifiers
.type
))
17767 type
= decl_specifiers
.type
;
17768 if (!type
|| !TYPE_P (type
))
17769 error_at (decl_spec_token_start
->location
,
17770 "friend declaration does not name a class or "
17773 make_friend_class (current_class_type
, type
,
17774 /*complain=*/true);
17776 /* If there is no TYPE, an error message will already have
17778 else if (!type
|| type
== error_mark_node
)
17780 /* An anonymous aggregate has to be handled specially; such
17781 a declaration really declares a data member (with a
17782 particular type), as opposed to a nested class. */
17783 else if (ANON_AGGR_TYPE_P (type
))
17785 /* Remove constructors and such from TYPE, now that we
17786 know it is an anonymous aggregate. */
17787 fixup_anonymous_aggr (type
);
17788 /* And make the corresponding data member. */
17789 decl
= build_decl (decl_spec_token_start
->location
,
17790 FIELD_DECL
, NULL_TREE
, type
);
17791 /* Add it to the class. */
17792 finish_member_declaration (decl
);
17795 cp_parser_check_access_in_redeclaration
17797 decl_spec_token_start
->location
);
17802 bool assume_semicolon
= false;
17804 /* See if these declarations will be friends. */
17805 friend_p
= cp_parser_friend_p (&decl_specifiers
);
17807 /* Keep going until we hit the `;' at the end of the
17809 while (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
17811 tree attributes
= NULL_TREE
;
17812 tree first_attribute
;
17814 /* Peek at the next token. */
17815 token
= cp_lexer_peek_token (parser
->lexer
);
17817 /* Check for a bitfield declaration. */
17818 if (token
->type
== CPP_COLON
17819 || (token
->type
== CPP_NAME
17820 && cp_lexer_peek_nth_token (parser
->lexer
, 2)->type
17826 /* Get the name of the bitfield. Note that we cannot just
17827 check TOKEN here because it may have been invalidated by
17828 the call to cp_lexer_peek_nth_token above. */
17829 if (cp_lexer_peek_token (parser
->lexer
)->type
!= CPP_COLON
)
17830 identifier
= cp_parser_identifier (parser
);
17832 identifier
= NULL_TREE
;
17834 /* Consume the `:' token. */
17835 cp_lexer_consume_token (parser
->lexer
);
17836 /* Get the width of the bitfield. */
17838 = cp_parser_constant_expression (parser
,
17839 /*allow_non_constant=*/false,
17842 /* Look for attributes that apply to the bitfield. */
17843 attributes
= cp_parser_attributes_opt (parser
);
17844 /* Remember which attributes are prefix attributes and
17846 first_attribute
= attributes
;
17847 /* Combine the attributes. */
17848 attributes
= chainon (prefix_attributes
, attributes
);
17850 /* Create the bitfield declaration. */
17851 decl
= grokbitfield (identifier
17852 ? make_id_declarator (NULL_TREE
,
17862 cp_declarator
*declarator
;
17864 tree asm_specification
;
17865 int ctor_dtor_or_conv_p
;
17867 /* Parse the declarator. */
17869 = cp_parser_declarator (parser
, CP_PARSER_DECLARATOR_NAMED
,
17870 &ctor_dtor_or_conv_p
,
17871 /*parenthesized_p=*/NULL
,
17872 /*member_p=*/true);
17874 /* If something went wrong parsing the declarator, make sure
17875 that we at least consume some tokens. */
17876 if (declarator
== cp_error_declarator
)
17878 /* Skip to the end of the statement. */
17879 cp_parser_skip_to_end_of_statement (parser
);
17880 /* If the next token is not a semicolon, that is
17881 probably because we just skipped over the body of
17882 a function. So, we consume a semicolon if
17883 present, but do not issue an error message if it
17885 if (cp_lexer_next_token_is (parser
->lexer
,
17887 cp_lexer_consume_token (parser
->lexer
);
17891 if (declares_class_or_enum
& 2)
17892 cp_parser_check_for_definition_in_return_type
17893 (declarator
, decl_specifiers
.type
,
17894 decl_specifiers
.type_location
);
17896 /* Look for an asm-specification. */
17897 asm_specification
= cp_parser_asm_specification_opt (parser
);
17898 /* Look for attributes that apply to the declaration. */
17899 attributes
= cp_parser_attributes_opt (parser
);
17900 /* Remember which attributes are prefix attributes and
17902 first_attribute
= attributes
;
17903 /* Combine the attributes. */
17904 attributes
= chainon (prefix_attributes
, attributes
);
17906 /* If it's an `=', then we have a constant-initializer or a
17907 pure-specifier. It is not correct to parse the
17908 initializer before registering the member declaration
17909 since the member declaration should be in scope while
17910 its initializer is processed. However, the rest of the
17911 front end does not yet provide an interface that allows
17912 us to handle this correctly. */
17913 if (cp_lexer_next_token_is (parser
->lexer
, CPP_EQ
))
17917 A pure-specifier shall be used only in the declaration of
17918 a virtual function.
17920 A member-declarator can contain a constant-initializer
17921 only if it declares a static member of integral or
17924 Therefore, if the DECLARATOR is for a function, we look
17925 for a pure-specifier; otherwise, we look for a
17926 constant-initializer. When we call `grokfield', it will
17927 perform more stringent semantics checks. */
17928 initializer_token_start
= cp_lexer_peek_token (parser
->lexer
);
17929 if (function_declarator_p (declarator
))
17930 initializer
= cp_parser_pure_specifier (parser
);
17932 /* Parse the initializer. */
17933 initializer
= cp_parser_constant_initializer (parser
);
17935 /* Otherwise, there is no initializer. */
17937 initializer
= NULL_TREE
;
17939 /* See if we are probably looking at a function
17940 definition. We are certainly not looking at a
17941 member-declarator. Calling `grokfield' has
17942 side-effects, so we must not do it unless we are sure
17943 that we are looking at a member-declarator. */
17944 if (cp_parser_token_starts_function_definition_p
17945 (cp_lexer_peek_token (parser
->lexer
)))
17947 /* The grammar does not allow a pure-specifier to be
17948 used when a member function is defined. (It is
17949 possible that this fact is an oversight in the
17950 standard, since a pure function may be defined
17951 outside of the class-specifier. */
17953 error_at (initializer_token_start
->location
,
17954 "pure-specifier on function-definition");
17955 decl
= cp_parser_save_member_function_body (parser
,
17959 /* If the member was not a friend, declare it here. */
17961 finish_member_declaration (decl
);
17962 /* Peek at the next token. */
17963 token
= cp_lexer_peek_token (parser
->lexer
);
17964 /* If the next token is a semicolon, consume it. */
17965 if (token
->type
== CPP_SEMICOLON
)
17966 cp_lexer_consume_token (parser
->lexer
);
17970 if (declarator
->kind
== cdk_function
)
17971 declarator
->id_loc
= token
->location
;
17972 /* Create the declaration. */
17973 decl
= grokfield (declarator
, &decl_specifiers
,
17974 initializer
, /*init_const_expr_p=*/true,
17979 /* Reset PREFIX_ATTRIBUTES. */
17980 while (attributes
&& TREE_CHAIN (attributes
) != first_attribute
)
17981 attributes
= TREE_CHAIN (attributes
);
17983 TREE_CHAIN (attributes
) = NULL_TREE
;
17985 /* If there is any qualification still in effect, clear it
17986 now; we will be starting fresh with the next declarator. */
17987 parser
->scope
= NULL_TREE
;
17988 parser
->qualifying_scope
= NULL_TREE
;
17989 parser
->object_scope
= NULL_TREE
;
17990 /* If it's a `,', then there are more declarators. */
17991 if (cp_lexer_next_token_is (parser
->lexer
, CPP_COMMA
))
17992 cp_lexer_consume_token (parser
->lexer
);
17993 /* If the next token isn't a `;', then we have a parse error. */
17994 else if (cp_lexer_next_token_is_not (parser
->lexer
,
17997 /* The next token might be a ways away from where the
17998 actual semicolon is missing. Find the previous token
17999 and use that for our error position. */
18000 cp_token
*token
= cp_lexer_previous_token (parser
->lexer
);
18001 error_at (token
->location
,
18002 "expected %<;%> at end of member declaration");
18004 /* Assume that the user meant to provide a semicolon. If
18005 we were to cp_parser_skip_to_end_of_statement, we might
18006 skip to a semicolon inside a member function definition
18007 and issue nonsensical error messages. */
18008 assume_semicolon
= true;
18013 /* Add DECL to the list of members. */
18015 finish_member_declaration (decl
);
18017 if (TREE_CODE (decl
) == FUNCTION_DECL
)
18018 cp_parser_save_default_args (parser
, decl
);
18021 if (assume_semicolon
)
18026 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
18028 parser
->colon_corrects_to_scope_p
= saved_colon_corrects_to_scope_p
;
18031 /* Parse a pure-specifier.
18036 Returns INTEGER_ZERO_NODE if a pure specifier is found.
18037 Otherwise, ERROR_MARK_NODE is returned. */
18040 cp_parser_pure_specifier (cp_parser
* parser
)
18044 /* Look for the `=' token. */
18045 if (!cp_parser_require (parser
, CPP_EQ
, RT_EQ
))
18046 return error_mark_node
;
18047 /* Look for the `0' token. */
18048 token
= cp_lexer_peek_token (parser
->lexer
);
18050 if (token
->type
== CPP_EOF
18051 || token
->type
== CPP_PRAGMA_EOL
)
18052 return error_mark_node
;
18054 cp_lexer_consume_token (parser
->lexer
);
18056 /* Accept = default or = delete in c++0x mode. */
18057 if (token
->keyword
== RID_DEFAULT
18058 || token
->keyword
== RID_DELETE
)
18060 maybe_warn_cpp0x (CPP0X_DEFAULTED_DELETED
);
18061 return token
->u
.value
;
18064 /* c_lex_with_flags marks a single digit '0' with PURE_ZERO. */
18065 if (token
->type
!= CPP_NUMBER
|| !(token
->flags
& PURE_ZERO
))
18067 cp_parser_error (parser
,
18068 "invalid pure specifier (only %<= 0%> is allowed)");
18069 cp_parser_skip_to_end_of_statement (parser
);
18070 return error_mark_node
;
18072 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
18074 error_at (token
->location
, "templates may not be %<virtual%>");
18075 return error_mark_node
;
18078 return integer_zero_node
;
18081 /* Parse a constant-initializer.
18083 constant-initializer:
18084 = constant-expression
18086 Returns a representation of the constant-expression. */
18089 cp_parser_constant_initializer (cp_parser
* parser
)
18091 /* Look for the `=' token. */
18092 if (!cp_parser_require (parser
, CPP_EQ
, RT_EQ
))
18093 return error_mark_node
;
18095 /* It is invalid to write:
18097 struct S { static const int i = { 7 }; };
18100 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
18102 cp_parser_error (parser
,
18103 "a brace-enclosed initializer is not allowed here");
18104 /* Consume the opening brace. */
18105 cp_lexer_consume_token (parser
->lexer
);
18106 /* Skip the initializer. */
18107 cp_parser_skip_to_closing_brace (parser
);
18108 /* Look for the trailing `}'. */
18109 cp_parser_require (parser
, CPP_CLOSE_BRACE
, RT_CLOSE_BRACE
);
18111 return error_mark_node
;
18114 return cp_parser_constant_expression (parser
,
18115 /*allow_non_constant=*/false,
18119 /* Derived classes [gram.class.derived] */
18121 /* Parse a base-clause.
18124 : base-specifier-list
18126 base-specifier-list:
18127 base-specifier ... [opt]
18128 base-specifier-list , base-specifier ... [opt]
18130 Returns a TREE_LIST representing the base-classes, in the order in
18131 which they were declared. The representation of each node is as
18132 described by cp_parser_base_specifier.
18134 In the case that no bases are specified, this function will return
18135 NULL_TREE, not ERROR_MARK_NODE. */
18138 cp_parser_base_clause (cp_parser
* parser
)
18140 tree bases
= NULL_TREE
;
18142 /* Look for the `:' that begins the list. */
18143 cp_parser_require (parser
, CPP_COLON
, RT_COLON
);
18145 /* Scan the base-specifier-list. */
18150 bool pack_expansion_p
= false;
18152 /* Look for the base-specifier. */
18153 base
= cp_parser_base_specifier (parser
);
18154 /* Look for the (optional) ellipsis. */
18155 if (cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
18157 /* Consume the `...'. */
18158 cp_lexer_consume_token (parser
->lexer
);
18160 pack_expansion_p
= true;
18163 /* Add BASE to the front of the list. */
18164 if (base
!= error_mark_node
)
18166 if (pack_expansion_p
)
18167 /* Make this a pack expansion type. */
18168 TREE_VALUE (base
) = make_pack_expansion (TREE_VALUE (base
));
18171 if (!check_for_bare_parameter_packs (TREE_VALUE (base
)))
18173 TREE_CHAIN (base
) = bases
;
18177 /* Peek at the next token. */
18178 token
= cp_lexer_peek_token (parser
->lexer
);
18179 /* If it's not a comma, then the list is complete. */
18180 if (token
->type
!= CPP_COMMA
)
18182 /* Consume the `,'. */
18183 cp_lexer_consume_token (parser
->lexer
);
18186 /* PARSER->SCOPE may still be non-NULL at this point, if the last
18187 base class had a qualified name. However, the next name that
18188 appears is certainly not qualified. */
18189 parser
->scope
= NULL_TREE
;
18190 parser
->qualifying_scope
= NULL_TREE
;
18191 parser
->object_scope
= NULL_TREE
;
18193 return nreverse (bases
);
18196 /* Parse a base-specifier.
18199 :: [opt] nested-name-specifier [opt] class-name
18200 virtual access-specifier [opt] :: [opt] nested-name-specifier
18202 access-specifier virtual [opt] :: [opt] nested-name-specifier
18205 Returns a TREE_LIST. The TREE_PURPOSE will be one of
18206 ACCESS_{DEFAULT,PUBLIC,PROTECTED,PRIVATE}_[VIRTUAL]_NODE to
18207 indicate the specifiers provided. The TREE_VALUE will be a TYPE
18208 (or the ERROR_MARK_NODE) indicating the type that was specified. */
18211 cp_parser_base_specifier (cp_parser
* parser
)
18215 bool virtual_p
= false;
18216 bool duplicate_virtual_error_issued_p
= false;
18217 bool duplicate_access_error_issued_p
= false;
18218 bool class_scope_p
, template_p
;
18219 tree access
= access_default_node
;
18222 /* Process the optional `virtual' and `access-specifier'. */
18225 /* Peek at the next token. */
18226 token
= cp_lexer_peek_token (parser
->lexer
);
18227 /* Process `virtual'. */
18228 switch (token
->keyword
)
18231 /* If `virtual' appears more than once, issue an error. */
18232 if (virtual_p
&& !duplicate_virtual_error_issued_p
)
18234 cp_parser_error (parser
,
18235 "%<virtual%> specified more than once in base-specified");
18236 duplicate_virtual_error_issued_p
= true;
18241 /* Consume the `virtual' token. */
18242 cp_lexer_consume_token (parser
->lexer
);
18247 case RID_PROTECTED
:
18249 /* If more than one access specifier appears, issue an
18251 if (access
!= access_default_node
18252 && !duplicate_access_error_issued_p
)
18254 cp_parser_error (parser
,
18255 "more than one access specifier in base-specified");
18256 duplicate_access_error_issued_p
= true;
18259 access
= ridpointers
[(int) token
->keyword
];
18261 /* Consume the access-specifier. */
18262 cp_lexer_consume_token (parser
->lexer
);
18271 /* It is not uncommon to see programs mechanically, erroneously, use
18272 the 'typename' keyword to denote (dependent) qualified types
18273 as base classes. */
18274 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_TYPENAME
))
18276 token
= cp_lexer_peek_token (parser
->lexer
);
18277 if (!processing_template_decl
)
18278 error_at (token
->location
,
18279 "keyword %<typename%> not allowed outside of templates");
18281 error_at (token
->location
,
18282 "keyword %<typename%> not allowed in this context "
18283 "(the base class is implicitly a type)");
18284 cp_lexer_consume_token (parser
->lexer
);
18287 /* Look for the optional `::' operator. */
18288 cp_parser_global_scope_opt (parser
, /*current_scope_valid_p=*/false);
18289 /* Look for the nested-name-specifier. The simplest way to
18294 The keyword `typename' is not permitted in a base-specifier or
18295 mem-initializer; in these contexts a qualified name that
18296 depends on a template-parameter is implicitly assumed to be a
18299 is to pretend that we have seen the `typename' keyword at this
18301 cp_parser_nested_name_specifier_opt (parser
,
18302 /*typename_keyword_p=*/true,
18303 /*check_dependency_p=*/true,
18305 /*is_declaration=*/true);
18306 /* If the base class is given by a qualified name, assume that names
18307 we see are type names or templates, as appropriate. */
18308 class_scope_p
= (parser
->scope
&& TYPE_P (parser
->scope
));
18309 template_p
= class_scope_p
&& cp_parser_optional_template_keyword (parser
);
18311 /* Finally, look for the class-name. */
18312 type
= cp_parser_class_name (parser
,
18316 /*check_dependency_p=*/true,
18317 /*class_head_p=*/false,
18318 /*is_declaration=*/true);
18320 if (type
== error_mark_node
)
18321 return error_mark_node
;
18323 return finish_base_specifier (TREE_TYPE (type
), access
, virtual_p
);
18326 /* Exception handling [gram.exception] */
18328 /* Parse an (optional) exception-specification.
18330 exception-specification:
18331 throw ( type-id-list [opt] )
18333 Returns a TREE_LIST representing the exception-specification. The
18334 TREE_VALUE of each node is a type. */
18337 cp_parser_exception_specification_opt (cp_parser
* parser
)
18341 const char *saved_message
;
18343 /* Peek at the next token. */
18344 token
= cp_lexer_peek_token (parser
->lexer
);
18346 /* Is it a noexcept-specification? */
18347 if (cp_parser_is_keyword (token
, RID_NOEXCEPT
))
18350 cp_lexer_consume_token (parser
->lexer
);
18352 if (cp_lexer_peek_token (parser
->lexer
)->type
== CPP_OPEN_PAREN
)
18354 cp_lexer_consume_token (parser
->lexer
);
18356 /* Types may not be defined in an exception-specification. */
18357 saved_message
= parser
->type_definition_forbidden_message
;
18358 parser
->type_definition_forbidden_message
18359 = G_("types may not be defined in an exception-specification");
18361 expr
= cp_parser_constant_expression (parser
, false, NULL
);
18363 /* Restore the saved message. */
18364 parser
->type_definition_forbidden_message
= saved_message
;
18366 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
18369 expr
= boolean_true_node
;
18371 return build_noexcept_spec (expr
, tf_warning_or_error
);
18374 /* If it's not `throw', then there's no exception-specification. */
18375 if (!cp_parser_is_keyword (token
, RID_THROW
))
18379 /* Enable this once a lot of code has transitioned to noexcept? */
18380 if (cxx_dialect
== cxx0x
&& !in_system_header
)
18381 warning (OPT_Wdeprecated
, "dynamic exception specifications are "
18382 "deprecated in C++0x; use %<noexcept%> instead");
18385 /* Consume the `throw'. */
18386 cp_lexer_consume_token (parser
->lexer
);
18388 /* Look for the `('. */
18389 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
18391 /* Peek at the next token. */
18392 token
= cp_lexer_peek_token (parser
->lexer
);
18393 /* If it's not a `)', then there is a type-id-list. */
18394 if (token
->type
!= CPP_CLOSE_PAREN
)
18396 /* Types may not be defined in an exception-specification. */
18397 saved_message
= parser
->type_definition_forbidden_message
;
18398 parser
->type_definition_forbidden_message
18399 = G_("types may not be defined in an exception-specification");
18400 /* Parse the type-id-list. */
18401 type_id_list
= cp_parser_type_id_list (parser
);
18402 /* Restore the saved message. */
18403 parser
->type_definition_forbidden_message
= saved_message
;
18406 type_id_list
= empty_except_spec
;
18408 /* Look for the `)'. */
18409 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
18411 return type_id_list
;
18414 /* Parse an (optional) type-id-list.
18418 type-id-list , type-id ... [opt]
18420 Returns a TREE_LIST. The TREE_VALUE of each node is a TYPE,
18421 in the order that the types were presented. */
18424 cp_parser_type_id_list (cp_parser
* parser
)
18426 tree types
= NULL_TREE
;
18433 /* Get the next type-id. */
18434 type
= cp_parser_type_id (parser
);
18435 /* Parse the optional ellipsis. */
18436 if (cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
18438 /* Consume the `...'. */
18439 cp_lexer_consume_token (parser
->lexer
);
18441 /* Turn the type into a pack expansion expression. */
18442 type
= make_pack_expansion (type
);
18444 /* Add it to the list. */
18445 types
= add_exception_specifier (types
, type
, /*complain=*/1);
18446 /* Peek at the next token. */
18447 token
= cp_lexer_peek_token (parser
->lexer
);
18448 /* If it is not a `,', we are done. */
18449 if (token
->type
!= CPP_COMMA
)
18451 /* Consume the `,'. */
18452 cp_lexer_consume_token (parser
->lexer
);
18455 return nreverse (types
);
18458 /* Parse a try-block.
18461 try compound-statement handler-seq */
18464 cp_parser_try_block (cp_parser
* parser
)
18468 cp_parser_require_keyword (parser
, RID_TRY
, RT_TRY
);
18469 try_block
= begin_try_block ();
18470 cp_parser_compound_statement (parser
, NULL
, true);
18471 finish_try_block (try_block
);
18472 cp_parser_handler_seq (parser
);
18473 finish_handler_sequence (try_block
);
18478 /* Parse a function-try-block.
18480 function-try-block:
18481 try ctor-initializer [opt] function-body handler-seq */
18484 cp_parser_function_try_block (cp_parser
* parser
)
18486 tree compound_stmt
;
18488 bool ctor_initializer_p
;
18490 /* Look for the `try' keyword. */
18491 if (!cp_parser_require_keyword (parser
, RID_TRY
, RT_TRY
))
18493 /* Let the rest of the front end know where we are. */
18494 try_block
= begin_function_try_block (&compound_stmt
);
18495 /* Parse the function-body. */
18497 = cp_parser_ctor_initializer_opt_and_function_body (parser
);
18498 /* We're done with the `try' part. */
18499 finish_function_try_block (try_block
);
18500 /* Parse the handlers. */
18501 cp_parser_handler_seq (parser
);
18502 /* We're done with the handlers. */
18503 finish_function_handler_sequence (try_block
, compound_stmt
);
18505 return ctor_initializer_p
;
18508 /* Parse a handler-seq.
18511 handler handler-seq [opt] */
18514 cp_parser_handler_seq (cp_parser
* parser
)
18520 /* Parse the handler. */
18521 cp_parser_handler (parser
);
18522 /* Peek at the next token. */
18523 token
= cp_lexer_peek_token (parser
->lexer
);
18524 /* If it's not `catch' then there are no more handlers. */
18525 if (!cp_parser_is_keyword (token
, RID_CATCH
))
18530 /* Parse a handler.
18533 catch ( exception-declaration ) compound-statement */
18536 cp_parser_handler (cp_parser
* parser
)
18541 cp_parser_require_keyword (parser
, RID_CATCH
, RT_CATCH
);
18542 handler
= begin_handler ();
18543 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
18544 declaration
= cp_parser_exception_declaration (parser
);
18545 finish_handler_parms (declaration
, handler
);
18546 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
18547 cp_parser_compound_statement (parser
, NULL
, false);
18548 finish_handler (handler
);
18551 /* Parse an exception-declaration.
18553 exception-declaration:
18554 type-specifier-seq declarator
18555 type-specifier-seq abstract-declarator
18559 Returns a VAR_DECL for the declaration, or NULL_TREE if the
18560 ellipsis variant is used. */
18563 cp_parser_exception_declaration (cp_parser
* parser
)
18565 cp_decl_specifier_seq type_specifiers
;
18566 cp_declarator
*declarator
;
18567 const char *saved_message
;
18569 /* If it's an ellipsis, it's easy to handle. */
18570 if (cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
18572 /* Consume the `...' token. */
18573 cp_lexer_consume_token (parser
->lexer
);
18577 /* Types may not be defined in exception-declarations. */
18578 saved_message
= parser
->type_definition_forbidden_message
;
18579 parser
->type_definition_forbidden_message
18580 = G_("types may not be defined in exception-declarations");
18582 /* Parse the type-specifier-seq. */
18583 cp_parser_type_specifier_seq (parser
, /*is_declaration=*/true,
18584 /*is_trailing_return=*/false,
18586 /* If it's a `)', then there is no declarator. */
18587 if (cp_lexer_next_token_is (parser
->lexer
, CPP_CLOSE_PAREN
))
18590 declarator
= cp_parser_declarator (parser
, CP_PARSER_DECLARATOR_EITHER
,
18591 /*ctor_dtor_or_conv_p=*/NULL
,
18592 /*parenthesized_p=*/NULL
,
18593 /*member_p=*/false);
18595 /* Restore the saved message. */
18596 parser
->type_definition_forbidden_message
= saved_message
;
18598 if (!type_specifiers
.any_specifiers_p
)
18599 return error_mark_node
;
18601 return grokdeclarator (declarator
, &type_specifiers
, CATCHPARM
, 1, NULL
);
18604 /* Parse a throw-expression.
18607 throw assignment-expression [opt]
18609 Returns a THROW_EXPR representing the throw-expression. */
18612 cp_parser_throw_expression (cp_parser
* parser
)
18617 cp_parser_require_keyword (parser
, RID_THROW
, RT_THROW
);
18618 token
= cp_lexer_peek_token (parser
->lexer
);
18619 /* Figure out whether or not there is an assignment-expression
18620 following the "throw" keyword. */
18621 if (token
->type
== CPP_COMMA
18622 || token
->type
== CPP_SEMICOLON
18623 || token
->type
== CPP_CLOSE_PAREN
18624 || token
->type
== CPP_CLOSE_SQUARE
18625 || token
->type
== CPP_CLOSE_BRACE
18626 || token
->type
== CPP_COLON
)
18627 expression
= NULL_TREE
;
18629 expression
= cp_parser_assignment_expression (parser
,
18630 /*cast_p=*/false, NULL
);
18632 return build_throw (expression
);
18635 /* GNU Extensions */
18637 /* Parse an (optional) asm-specification.
18640 asm ( string-literal )
18642 If the asm-specification is present, returns a STRING_CST
18643 corresponding to the string-literal. Otherwise, returns
18647 cp_parser_asm_specification_opt (cp_parser
* parser
)
18650 tree asm_specification
;
18652 /* Peek at the next token. */
18653 token
= cp_lexer_peek_token (parser
->lexer
);
18654 /* If the next token isn't the `asm' keyword, then there's no
18655 asm-specification. */
18656 if (!cp_parser_is_keyword (token
, RID_ASM
))
18659 /* Consume the `asm' token. */
18660 cp_lexer_consume_token (parser
->lexer
);
18661 /* Look for the `('. */
18662 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
18664 /* Look for the string-literal. */
18665 asm_specification
= cp_parser_string_literal (parser
, false, false);
18667 /* Look for the `)'. */
18668 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
18670 return asm_specification
;
18673 /* Parse an asm-operand-list.
18677 asm-operand-list , asm-operand
18680 string-literal ( expression )
18681 [ string-literal ] string-literal ( expression )
18683 Returns a TREE_LIST representing the operands. The TREE_VALUE of
18684 each node is the expression. The TREE_PURPOSE is itself a
18685 TREE_LIST whose TREE_PURPOSE is a STRING_CST for the bracketed
18686 string-literal (or NULL_TREE if not present) and whose TREE_VALUE
18687 is a STRING_CST for the string literal before the parenthesis. Returns
18688 ERROR_MARK_NODE if any of the operands are invalid. */
18691 cp_parser_asm_operand_list (cp_parser
* parser
)
18693 tree asm_operands
= NULL_TREE
;
18694 bool invalid_operands
= false;
18698 tree string_literal
;
18702 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_SQUARE
))
18704 /* Consume the `[' token. */
18705 cp_lexer_consume_token (parser
->lexer
);
18706 /* Read the operand name. */
18707 name
= cp_parser_identifier (parser
);
18708 if (name
!= error_mark_node
)
18709 name
= build_string (IDENTIFIER_LENGTH (name
),
18710 IDENTIFIER_POINTER (name
));
18711 /* Look for the closing `]'. */
18712 cp_parser_require (parser
, CPP_CLOSE_SQUARE
, RT_CLOSE_SQUARE
);
18716 /* Look for the string-literal. */
18717 string_literal
= cp_parser_string_literal (parser
, false, false);
18719 /* Look for the `('. */
18720 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
18721 /* Parse the expression. */
18722 expression
= cp_parser_expression (parser
, /*cast_p=*/false, NULL
);
18723 /* Look for the `)'. */
18724 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
18726 if (name
== error_mark_node
18727 || string_literal
== error_mark_node
18728 || expression
== error_mark_node
)
18729 invalid_operands
= true;
18731 /* Add this operand to the list. */
18732 asm_operands
= tree_cons (build_tree_list (name
, string_literal
),
18735 /* If the next token is not a `,', there are no more
18737 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COMMA
))
18739 /* Consume the `,'. */
18740 cp_lexer_consume_token (parser
->lexer
);
18743 return invalid_operands
? error_mark_node
: nreverse (asm_operands
);
18746 /* Parse an asm-clobber-list.
18750 asm-clobber-list , string-literal
18752 Returns a TREE_LIST, indicating the clobbers in the order that they
18753 appeared. The TREE_VALUE of each node is a STRING_CST. */
18756 cp_parser_asm_clobber_list (cp_parser
* parser
)
18758 tree clobbers
= NULL_TREE
;
18762 tree string_literal
;
18764 /* Look for the string literal. */
18765 string_literal
= cp_parser_string_literal (parser
, false, false);
18766 /* Add it to the list. */
18767 clobbers
= tree_cons (NULL_TREE
, string_literal
, clobbers
);
18768 /* If the next token is not a `,', then the list is
18770 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COMMA
))
18772 /* Consume the `,' token. */
18773 cp_lexer_consume_token (parser
->lexer
);
18779 /* Parse an asm-label-list.
18783 asm-label-list , identifier
18785 Returns a TREE_LIST, indicating the labels in the order that they
18786 appeared. The TREE_VALUE of each node is a label. */
18789 cp_parser_asm_label_list (cp_parser
* parser
)
18791 tree labels
= NULL_TREE
;
18795 tree identifier
, label
, name
;
18797 /* Look for the identifier. */
18798 identifier
= cp_parser_identifier (parser
);
18799 if (!error_operand_p (identifier
))
18801 label
= lookup_label (identifier
);
18802 if (TREE_CODE (label
) == LABEL_DECL
)
18804 TREE_USED (label
) = 1;
18805 check_goto (label
);
18806 name
= build_string (IDENTIFIER_LENGTH (identifier
),
18807 IDENTIFIER_POINTER (identifier
));
18808 labels
= tree_cons (name
, label
, labels
);
18811 /* If the next token is not a `,', then the list is
18813 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COMMA
))
18815 /* Consume the `,' token. */
18816 cp_lexer_consume_token (parser
->lexer
);
18819 return nreverse (labels
);
18822 /* Parse an (optional) series of attributes.
18825 attributes attribute
18828 __attribute__ (( attribute-list [opt] ))
18830 The return value is as for cp_parser_attribute_list. */
18833 cp_parser_attributes_opt (cp_parser
* parser
)
18835 tree attributes
= NULL_TREE
;
18840 tree attribute_list
;
18842 /* Peek at the next token. */
18843 token
= cp_lexer_peek_token (parser
->lexer
);
18844 /* If it's not `__attribute__', then we're done. */
18845 if (token
->keyword
!= RID_ATTRIBUTE
)
18848 /* Consume the `__attribute__' keyword. */
18849 cp_lexer_consume_token (parser
->lexer
);
18850 /* Look for the two `(' tokens. */
18851 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
18852 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
18854 /* Peek at the next token. */
18855 token
= cp_lexer_peek_token (parser
->lexer
);
18856 if (token
->type
!= CPP_CLOSE_PAREN
)
18857 /* Parse the attribute-list. */
18858 attribute_list
= cp_parser_attribute_list (parser
);
18860 /* If the next token is a `)', then there is no attribute
18862 attribute_list
= NULL
;
18864 /* Look for the two `)' tokens. */
18865 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
18866 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
18868 /* Add these new attributes to the list. */
18869 attributes
= chainon (attributes
, attribute_list
);
18875 /* Parse an attribute-list.
18879 attribute-list , attribute
18883 identifier ( identifier )
18884 identifier ( identifier , expression-list )
18885 identifier ( expression-list )
18887 Returns a TREE_LIST, or NULL_TREE on error. Each node corresponds
18888 to an attribute. The TREE_PURPOSE of each node is the identifier
18889 indicating which attribute is in use. The TREE_VALUE represents
18890 the arguments, if any. */
18893 cp_parser_attribute_list (cp_parser
* parser
)
18895 tree attribute_list
= NULL_TREE
;
18896 bool save_translate_strings_p
= parser
->translate_strings_p
;
18898 parser
->translate_strings_p
= false;
18905 /* Look for the identifier. We also allow keywords here; for
18906 example `__attribute__ ((const))' is legal. */
18907 token
= cp_lexer_peek_token (parser
->lexer
);
18908 if (token
->type
== CPP_NAME
18909 || token
->type
== CPP_KEYWORD
)
18911 tree arguments
= NULL_TREE
;
18913 /* Consume the token. */
18914 token
= cp_lexer_consume_token (parser
->lexer
);
18916 /* Save away the identifier that indicates which attribute
18918 identifier
= (token
->type
== CPP_KEYWORD
)
18919 /* For keywords, use the canonical spelling, not the
18920 parsed identifier. */
18921 ? ridpointers
[(int) token
->keyword
]
18924 attribute
= build_tree_list (identifier
, NULL_TREE
);
18926 /* Peek at the next token. */
18927 token
= cp_lexer_peek_token (parser
->lexer
);
18928 /* If it's an `(', then parse the attribute arguments. */
18929 if (token
->type
== CPP_OPEN_PAREN
)
18932 int attr_flag
= (attribute_takes_identifier_p (identifier
)
18933 ? id_attr
: normal_attr
);
18934 vec
= cp_parser_parenthesized_expression_list
18935 (parser
, attr_flag
, /*cast_p=*/false,
18936 /*allow_expansion_p=*/false,
18937 /*non_constant_p=*/NULL
);
18939 arguments
= error_mark_node
;
18942 arguments
= build_tree_list_vec (vec
);
18943 release_tree_vector (vec
);
18945 /* Save the arguments away. */
18946 TREE_VALUE (attribute
) = arguments
;
18949 if (arguments
!= error_mark_node
)
18951 /* Add this attribute to the list. */
18952 TREE_CHAIN (attribute
) = attribute_list
;
18953 attribute_list
= attribute
;
18956 token
= cp_lexer_peek_token (parser
->lexer
);
18958 /* Now, look for more attributes. If the next token isn't a
18959 `,', we're done. */
18960 if (token
->type
!= CPP_COMMA
)
18963 /* Consume the comma and keep going. */
18964 cp_lexer_consume_token (parser
->lexer
);
18966 parser
->translate_strings_p
= save_translate_strings_p
;
18968 /* We built up the list in reverse order. */
18969 return nreverse (attribute_list
);
18972 /* Parse an optional `__extension__' keyword. Returns TRUE if it is
18973 present, and FALSE otherwise. *SAVED_PEDANTIC is set to the
18974 current value of the PEDANTIC flag, regardless of whether or not
18975 the `__extension__' keyword is present. The caller is responsible
18976 for restoring the value of the PEDANTIC flag. */
18979 cp_parser_extension_opt (cp_parser
* parser
, int* saved_pedantic
)
18981 /* Save the old value of the PEDANTIC flag. */
18982 *saved_pedantic
= pedantic
;
18984 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_EXTENSION
))
18986 /* Consume the `__extension__' token. */
18987 cp_lexer_consume_token (parser
->lexer
);
18988 /* We're not being pedantic while the `__extension__' keyword is
18998 /* Parse a label declaration.
19001 __label__ label-declarator-seq ;
19003 label-declarator-seq:
19004 identifier , label-declarator-seq
19008 cp_parser_label_declaration (cp_parser
* parser
)
19010 /* Look for the `__label__' keyword. */
19011 cp_parser_require_keyword (parser
, RID_LABEL
, RT_LABEL
);
19017 /* Look for an identifier. */
19018 identifier
= cp_parser_identifier (parser
);
19019 /* If we failed, stop. */
19020 if (identifier
== error_mark_node
)
19022 /* Declare it as a label. */
19023 finish_label_decl (identifier
);
19024 /* If the next token is a `;', stop. */
19025 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
19027 /* Look for the `,' separating the label declarations. */
19028 cp_parser_require (parser
, CPP_COMMA
, RT_COMMA
);
19031 /* Look for the final `;'. */
19032 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
19035 /* Support Functions */
19037 /* Looks up NAME in the current scope, as given by PARSER->SCOPE.
19038 NAME should have one of the representations used for an
19039 id-expression. If NAME is the ERROR_MARK_NODE, the ERROR_MARK_NODE
19040 is returned. If PARSER->SCOPE is a dependent type, then a
19041 SCOPE_REF is returned.
19043 If NAME is a TEMPLATE_ID_EXPR, then it will be immediately
19044 returned; the name was already resolved when the TEMPLATE_ID_EXPR
19045 was formed. Abstractly, such entities should not be passed to this
19046 function, because they do not need to be looked up, but it is
19047 simpler to check for this special case here, rather than at the
19050 In cases not explicitly covered above, this function returns a
19051 DECL, OVERLOAD, or baselink representing the result of the lookup.
19052 If there was no entity with the indicated NAME, the ERROR_MARK_NODE
19055 If TAG_TYPE is not NONE_TYPE, it indicates an explicit type keyword
19056 (e.g., "struct") that was used. In that case bindings that do not
19057 refer to types are ignored.
19059 If IS_TEMPLATE is TRUE, bindings that do not refer to templates are
19062 If IS_NAMESPACE is TRUE, bindings that do not refer to namespaces
19065 If CHECK_DEPENDENCY is TRUE, names are not looked up in dependent
19068 If AMBIGUOUS_DECLS is non-NULL, *AMBIGUOUS_DECLS is set to a
19069 TREE_LIST of candidates if name-lookup results in an ambiguity, and
19070 NULL_TREE otherwise. */
19073 cp_parser_lookup_name (cp_parser
*parser
, tree name
,
19074 enum tag_types tag_type
,
19077 bool check_dependency
,
19078 tree
*ambiguous_decls
,
19079 location_t name_location
)
19083 tree object_type
= parser
->context
->object_type
;
19085 if (!cp_parser_uncommitted_to_tentative_parse_p (parser
))
19086 flags
|= LOOKUP_COMPLAIN
;
19088 /* Assume that the lookup will be unambiguous. */
19089 if (ambiguous_decls
)
19090 *ambiguous_decls
= NULL_TREE
;
19092 /* Now that we have looked up the name, the OBJECT_TYPE (if any) is
19093 no longer valid. Note that if we are parsing tentatively, and
19094 the parse fails, OBJECT_TYPE will be automatically restored. */
19095 parser
->context
->object_type
= NULL_TREE
;
19097 if (name
== error_mark_node
)
19098 return error_mark_node
;
19100 /* A template-id has already been resolved; there is no lookup to
19102 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
19104 if (BASELINK_P (name
))
19106 gcc_assert (TREE_CODE (BASELINK_FUNCTIONS (name
))
19107 == TEMPLATE_ID_EXPR
);
19111 /* A BIT_NOT_EXPR is used to represent a destructor. By this point,
19112 it should already have been checked to make sure that the name
19113 used matches the type being destroyed. */
19114 if (TREE_CODE (name
) == BIT_NOT_EXPR
)
19118 /* Figure out to which type this destructor applies. */
19120 type
= parser
->scope
;
19121 else if (object_type
)
19122 type
= object_type
;
19124 type
= current_class_type
;
19125 /* If that's not a class type, there is no destructor. */
19126 if (!type
|| !CLASS_TYPE_P (type
))
19127 return error_mark_node
;
19128 if (CLASSTYPE_LAZY_DESTRUCTOR (type
))
19129 lazily_declare_fn (sfk_destructor
, type
);
19130 if (!CLASSTYPE_DESTRUCTORS (type
))
19131 return error_mark_node
;
19132 /* If it was a class type, return the destructor. */
19133 return CLASSTYPE_DESTRUCTORS (type
);
19136 /* By this point, the NAME should be an ordinary identifier. If
19137 the id-expression was a qualified name, the qualifying scope is
19138 stored in PARSER->SCOPE at this point. */
19139 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
19141 /* Perform the lookup. */
19146 if (parser
->scope
== error_mark_node
)
19147 return error_mark_node
;
19149 /* If the SCOPE is dependent, the lookup must be deferred until
19150 the template is instantiated -- unless we are explicitly
19151 looking up names in uninstantiated templates. Even then, we
19152 cannot look up the name if the scope is not a class type; it
19153 might, for example, be a template type parameter. */
19154 dependent_p
= (TYPE_P (parser
->scope
)
19155 && dependent_scope_p (parser
->scope
));
19156 if ((check_dependency
|| !CLASS_TYPE_P (parser
->scope
))
19158 /* Defer lookup. */
19159 decl
= error_mark_node
;
19162 tree pushed_scope
= NULL_TREE
;
19164 /* If PARSER->SCOPE is a dependent type, then it must be a
19165 class type, and we must not be checking dependencies;
19166 otherwise, we would have processed this lookup above. So
19167 that PARSER->SCOPE is not considered a dependent base by
19168 lookup_member, we must enter the scope here. */
19170 pushed_scope
= push_scope (parser
->scope
);
19172 /* If the PARSER->SCOPE is a template specialization, it
19173 may be instantiated during name lookup. In that case,
19174 errors may be issued. Even if we rollback the current
19175 tentative parse, those errors are valid. */
19176 decl
= lookup_qualified_name (parser
->scope
, name
,
19177 tag_type
!= none_type
,
19178 /*complain=*/true);
19180 /* 3.4.3.1: In a lookup in which the constructor is an acceptable
19181 lookup result and the nested-name-specifier nominates a class C:
19182 * if the name specified after the nested-name-specifier, when
19183 looked up in C, is the injected-class-name of C (Clause 9), or
19184 * if the name specified after the nested-name-specifier is the
19185 same as the identifier or the simple-template-id's template-
19186 name in the last component of the nested-name-specifier,
19187 the name is instead considered to name the constructor of
19188 class C. [ Note: for example, the constructor is not an
19189 acceptable lookup result in an elaborated-type-specifier so
19190 the constructor would not be used in place of the
19191 injected-class-name. --end note ] Such a constructor name
19192 shall be used only in the declarator-id of a declaration that
19193 names a constructor or in a using-declaration. */
19194 if (tag_type
== none_type
19195 && DECL_SELF_REFERENCE_P (decl
)
19196 && same_type_p (DECL_CONTEXT (decl
), parser
->scope
))
19197 decl
= lookup_qualified_name (parser
->scope
, ctor_identifier
,
19198 tag_type
!= none_type
,
19199 /*complain=*/true);
19201 /* If we have a single function from a using decl, pull it out. */
19202 if (TREE_CODE (decl
) == OVERLOAD
19203 && !really_overloaded_fn (decl
))
19204 decl
= OVL_FUNCTION (decl
);
19207 pop_scope (pushed_scope
);
19210 /* If the scope is a dependent type and either we deferred lookup or
19211 we did lookup but didn't find the name, rememeber the name. */
19212 if (decl
== error_mark_node
&& TYPE_P (parser
->scope
)
19213 && dependent_type_p (parser
->scope
))
19219 /* The resolution to Core Issue 180 says that `struct
19220 A::B' should be considered a type-name, even if `A'
19222 type
= make_typename_type (parser
->scope
, name
, tag_type
,
19223 /*complain=*/tf_error
);
19224 decl
= TYPE_NAME (type
);
19226 else if (is_template
19227 && (cp_parser_next_token_ends_template_argument_p (parser
)
19228 || cp_lexer_next_token_is (parser
->lexer
,
19230 decl
= make_unbound_class_template (parser
->scope
,
19232 /*complain=*/tf_error
);
19234 decl
= build_qualified_name (/*type=*/NULL_TREE
,
19235 parser
->scope
, name
,
19238 parser
->qualifying_scope
= parser
->scope
;
19239 parser
->object_scope
= NULL_TREE
;
19241 else if (object_type
)
19243 tree object_decl
= NULL_TREE
;
19244 /* Look up the name in the scope of the OBJECT_TYPE, unless the
19245 OBJECT_TYPE is not a class. */
19246 if (CLASS_TYPE_P (object_type
))
19247 /* If the OBJECT_TYPE is a template specialization, it may
19248 be instantiated during name lookup. In that case, errors
19249 may be issued. Even if we rollback the current tentative
19250 parse, those errors are valid. */
19251 object_decl
= lookup_member (object_type
,
19254 tag_type
!= none_type
);
19255 /* Look it up in the enclosing context, too. */
19256 decl
= lookup_name_real (name
, tag_type
!= none_type
,
19258 /*block_p=*/true, is_namespace
, flags
);
19259 parser
->object_scope
= object_type
;
19260 parser
->qualifying_scope
= NULL_TREE
;
19262 decl
= object_decl
;
19266 decl
= lookup_name_real (name
, tag_type
!= none_type
,
19268 /*block_p=*/true, is_namespace
, flags
);
19269 parser
->qualifying_scope
= NULL_TREE
;
19270 parser
->object_scope
= NULL_TREE
;
19273 /* If the lookup failed, let our caller know. */
19274 if (!decl
|| decl
== error_mark_node
)
19275 return error_mark_node
;
19277 /* Pull out the template from an injected-class-name (or multiple). */
19279 decl
= maybe_get_template_decl_from_type_decl (decl
);
19281 /* If it's a TREE_LIST, the result of the lookup was ambiguous. */
19282 if (TREE_CODE (decl
) == TREE_LIST
)
19284 if (ambiguous_decls
)
19285 *ambiguous_decls
= decl
;
19286 /* The error message we have to print is too complicated for
19287 cp_parser_error, so we incorporate its actions directly. */
19288 if (!cp_parser_simulate_error (parser
))
19290 error_at (name_location
, "reference to %qD is ambiguous",
19292 print_candidates (decl
);
19294 return error_mark_node
;
19297 gcc_assert (DECL_P (decl
)
19298 || TREE_CODE (decl
) == OVERLOAD
19299 || TREE_CODE (decl
) == SCOPE_REF
19300 || TREE_CODE (decl
) == UNBOUND_CLASS_TEMPLATE
19301 || BASELINK_P (decl
));
19303 /* If we have resolved the name of a member declaration, check to
19304 see if the declaration is accessible. When the name resolves to
19305 set of overloaded functions, accessibility is checked when
19306 overload resolution is done.
19308 During an explicit instantiation, access is not checked at all,
19309 as per [temp.explicit]. */
19311 check_accessibility_of_qualified_id (decl
, object_type
, parser
->scope
);
19316 /* Like cp_parser_lookup_name, but for use in the typical case where
19317 CHECK_ACCESS is TRUE, IS_TYPE is FALSE, IS_TEMPLATE is FALSE,
19318 IS_NAMESPACE is FALSE, and CHECK_DEPENDENCY is TRUE. */
19321 cp_parser_lookup_name_simple (cp_parser
* parser
, tree name
, location_t location
)
19323 return cp_parser_lookup_name (parser
, name
,
19325 /*is_template=*/false,
19326 /*is_namespace=*/false,
19327 /*check_dependency=*/true,
19328 /*ambiguous_decls=*/NULL
,
19332 /* If DECL is a TEMPLATE_DECL that can be treated like a TYPE_DECL in
19333 the current context, return the TYPE_DECL. If TAG_NAME_P is
19334 true, the DECL indicates the class being defined in a class-head,
19335 or declared in an elaborated-type-specifier.
19337 Otherwise, return DECL. */
19340 cp_parser_maybe_treat_template_as_class (tree decl
, bool tag_name_p
)
19342 /* If the TEMPLATE_DECL is being declared as part of a class-head,
19343 the translation from TEMPLATE_DECL to TYPE_DECL occurs:
19346 template <typename T> struct B;
19349 template <typename T> struct A::B {};
19351 Similarly, in an elaborated-type-specifier:
19353 namespace N { struct X{}; }
19356 template <typename T> friend struct N::X;
19359 However, if the DECL refers to a class type, and we are in
19360 the scope of the class, then the name lookup automatically
19361 finds the TYPE_DECL created by build_self_reference rather
19362 than a TEMPLATE_DECL. For example, in:
19364 template <class T> struct S {
19368 there is no need to handle such case. */
19370 if (DECL_CLASS_TEMPLATE_P (decl
) && tag_name_p
)
19371 return DECL_TEMPLATE_RESULT (decl
);
19376 /* If too many, or too few, template-parameter lists apply to the
19377 declarator, issue an error message. Returns TRUE if all went well,
19378 and FALSE otherwise. */
19381 cp_parser_check_declarator_template_parameters (cp_parser
* parser
,
19382 cp_declarator
*declarator
,
19383 location_t declarator_location
)
19385 unsigned num_templates
;
19387 /* We haven't seen any classes that involve template parameters yet. */
19390 switch (declarator
->kind
)
19393 if (declarator
->u
.id
.qualifying_scope
)
19397 scope
= declarator
->u
.id
.qualifying_scope
;
19399 while (scope
&& CLASS_TYPE_P (scope
))
19401 /* You're supposed to have one `template <...>'
19402 for every template class, but you don't need one
19403 for a full specialization. For example:
19405 template <class T> struct S{};
19406 template <> struct S<int> { void f(); };
19407 void S<int>::f () {}
19409 is correct; there shouldn't be a `template <>' for
19410 the definition of `S<int>::f'. */
19411 if (!CLASSTYPE_TEMPLATE_INFO (scope
))
19412 /* If SCOPE does not have template information of any
19413 kind, then it is not a template, nor is it nested
19414 within a template. */
19416 if (explicit_class_specialization_p (scope
))
19418 if (PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (scope
)))
19421 scope
= TYPE_CONTEXT (scope
);
19424 else if (TREE_CODE (declarator
->u
.id
.unqualified_name
)
19425 == TEMPLATE_ID_EXPR
)
19426 /* If the DECLARATOR has the form `X<y>' then it uses one
19427 additional level of template parameters. */
19430 return cp_parser_check_template_parameters
19431 (parser
, num_templates
, declarator_location
, declarator
);
19437 case cdk_reference
:
19439 return (cp_parser_check_declarator_template_parameters
19440 (parser
, declarator
->declarator
, declarator_location
));
19446 gcc_unreachable ();
19451 /* NUM_TEMPLATES were used in the current declaration. If that is
19452 invalid, return FALSE and issue an error messages. Otherwise,
19453 return TRUE. If DECLARATOR is non-NULL, then we are checking a
19454 declarator and we can print more accurate diagnostics. */
19457 cp_parser_check_template_parameters (cp_parser
* parser
,
19458 unsigned num_templates
,
19459 location_t location
,
19460 cp_declarator
*declarator
)
19462 /* If there are the same number of template classes and parameter
19463 lists, that's OK. */
19464 if (parser
->num_template_parameter_lists
== num_templates
)
19466 /* If there are more, but only one more, then we are referring to a
19467 member template. That's OK too. */
19468 if (parser
->num_template_parameter_lists
== num_templates
+ 1)
19470 /* If there are more template classes than parameter lists, we have
19473 template <class T> void S<T>::R<T>::f (); */
19474 if (parser
->num_template_parameter_lists
< num_templates
)
19476 if (declarator
&& !current_function_decl
)
19477 error_at (location
, "specializing member %<%T::%E%> "
19478 "requires %<template<>%> syntax",
19479 declarator
->u
.id
.qualifying_scope
,
19480 declarator
->u
.id
.unqualified_name
);
19481 else if (declarator
)
19482 error_at (location
, "invalid declaration of %<%T::%E%>",
19483 declarator
->u
.id
.qualifying_scope
,
19484 declarator
->u
.id
.unqualified_name
);
19486 error_at (location
, "too few template-parameter-lists");
19489 /* Otherwise, there are too many template parameter lists. We have
19492 template <class T> template <class U> void S::f(); */
19493 error_at (location
, "too many template-parameter-lists");
19497 /* Parse an optional `::' token indicating that the following name is
19498 from the global namespace. If so, PARSER->SCOPE is set to the
19499 GLOBAL_NAMESPACE. Otherwise, PARSER->SCOPE is set to NULL_TREE,
19500 unless CURRENT_SCOPE_VALID_P is TRUE, in which case it is left alone.
19501 Returns the new value of PARSER->SCOPE, if the `::' token is
19502 present, and NULL_TREE otherwise. */
19505 cp_parser_global_scope_opt (cp_parser
* parser
, bool current_scope_valid_p
)
19509 /* Peek at the next token. */
19510 token
= cp_lexer_peek_token (parser
->lexer
);
19511 /* If we're looking at a `::' token then we're starting from the
19512 global namespace, not our current location. */
19513 if (token
->type
== CPP_SCOPE
)
19515 /* Consume the `::' token. */
19516 cp_lexer_consume_token (parser
->lexer
);
19517 /* Set the SCOPE so that we know where to start the lookup. */
19518 parser
->scope
= global_namespace
;
19519 parser
->qualifying_scope
= global_namespace
;
19520 parser
->object_scope
= NULL_TREE
;
19522 return parser
->scope
;
19524 else if (!current_scope_valid_p
)
19526 parser
->scope
= NULL_TREE
;
19527 parser
->qualifying_scope
= NULL_TREE
;
19528 parser
->object_scope
= NULL_TREE
;
19534 /* Returns TRUE if the upcoming token sequence is the start of a
19535 constructor declarator. If FRIEND_P is true, the declarator is
19536 preceded by the `friend' specifier. */
19539 cp_parser_constructor_declarator_p (cp_parser
*parser
, bool friend_p
)
19541 bool constructor_p
;
19542 tree nested_name_specifier
;
19543 cp_token
*next_token
;
19545 /* The common case is that this is not a constructor declarator, so
19546 try to avoid doing lots of work if at all possible. It's not
19547 valid declare a constructor at function scope. */
19548 if (parser
->in_function_body
)
19550 /* And only certain tokens can begin a constructor declarator. */
19551 next_token
= cp_lexer_peek_token (parser
->lexer
);
19552 if (next_token
->type
!= CPP_NAME
19553 && next_token
->type
!= CPP_SCOPE
19554 && next_token
->type
!= CPP_NESTED_NAME_SPECIFIER
19555 && next_token
->type
!= CPP_TEMPLATE_ID
)
19558 /* Parse tentatively; we are going to roll back all of the tokens
19560 cp_parser_parse_tentatively (parser
);
19561 /* Assume that we are looking at a constructor declarator. */
19562 constructor_p
= true;
19564 /* Look for the optional `::' operator. */
19565 cp_parser_global_scope_opt (parser
,
19566 /*current_scope_valid_p=*/false);
19567 /* Look for the nested-name-specifier. */
19568 nested_name_specifier
19569 = (cp_parser_nested_name_specifier_opt (parser
,
19570 /*typename_keyword_p=*/false,
19571 /*check_dependency_p=*/false,
19573 /*is_declaration=*/false));
19574 /* Outside of a class-specifier, there must be a
19575 nested-name-specifier. */
19576 if (!nested_name_specifier
&&
19577 (!at_class_scope_p () || !TYPE_BEING_DEFINED (current_class_type
)
19579 constructor_p
= false;
19580 else if (nested_name_specifier
== error_mark_node
)
19581 constructor_p
= false;
19583 /* If we have a class scope, this is easy; DR 147 says that S::S always
19584 names the constructor, and no other qualified name could. */
19585 if (constructor_p
&& nested_name_specifier
19586 && TYPE_P (nested_name_specifier
))
19588 tree id
= cp_parser_unqualified_id (parser
,
19589 /*template_keyword_p=*/false,
19590 /*check_dependency_p=*/false,
19591 /*declarator_p=*/true,
19592 /*optional_p=*/false);
19593 if (is_overloaded_fn (id
))
19594 id
= DECL_NAME (get_first_fn (id
));
19595 if (!constructor_name_p (id
, nested_name_specifier
))
19596 constructor_p
= false;
19598 /* If we still think that this might be a constructor-declarator,
19599 look for a class-name. */
19600 else if (constructor_p
)
19604 template <typename T> struct S {
19608 we must recognize that the nested `S' names a class. */
19610 type_decl
= cp_parser_class_name (parser
,
19611 /*typename_keyword_p=*/false,
19612 /*template_keyword_p=*/false,
19614 /*check_dependency_p=*/false,
19615 /*class_head_p=*/false,
19616 /*is_declaration=*/false);
19617 /* If there was no class-name, then this is not a constructor. */
19618 constructor_p
= !cp_parser_error_occurred (parser
);
19620 /* If we're still considering a constructor, we have to see a `(',
19621 to begin the parameter-declaration-clause, followed by either a
19622 `)', an `...', or a decl-specifier. We need to check for a
19623 type-specifier to avoid being fooled into thinking that:
19627 is a constructor. (It is actually a function named `f' that
19628 takes one parameter (of type `int') and returns a value of type
19631 && !cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
19632 constructor_p
= false;
19635 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_CLOSE_PAREN
)
19636 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_ELLIPSIS
)
19637 /* A parameter declaration begins with a decl-specifier,
19638 which is either the "attribute" keyword, a storage class
19639 specifier, or (usually) a type-specifier. */
19640 && !cp_lexer_next_token_is_decl_specifier_keyword (parser
->lexer
))
19643 tree pushed_scope
= NULL_TREE
;
19644 unsigned saved_num_template_parameter_lists
;
19646 /* Names appearing in the type-specifier should be looked up
19647 in the scope of the class. */
19648 if (current_class_type
)
19652 type
= TREE_TYPE (type_decl
);
19653 if (TREE_CODE (type
) == TYPENAME_TYPE
)
19655 type
= resolve_typename_type (type
,
19656 /*only_current_p=*/false);
19657 if (TREE_CODE (type
) == TYPENAME_TYPE
)
19659 cp_parser_abort_tentative_parse (parser
);
19663 pushed_scope
= push_scope (type
);
19666 /* Inside the constructor parameter list, surrounding
19667 template-parameter-lists do not apply. */
19668 saved_num_template_parameter_lists
19669 = parser
->num_template_parameter_lists
;
19670 parser
->num_template_parameter_lists
= 0;
19672 /* Look for the type-specifier. */
19673 cp_parser_type_specifier (parser
,
19674 CP_PARSER_FLAGS_NONE
,
19675 /*decl_specs=*/NULL
,
19676 /*is_declarator=*/true,
19677 /*declares_class_or_enum=*/NULL
,
19678 /*is_cv_qualifier=*/NULL
);
19680 parser
->num_template_parameter_lists
19681 = saved_num_template_parameter_lists
;
19683 /* Leave the scope of the class. */
19685 pop_scope (pushed_scope
);
19687 constructor_p
= !cp_parser_error_occurred (parser
);
19691 /* We did not really want to consume any tokens. */
19692 cp_parser_abort_tentative_parse (parser
);
19694 return constructor_p
;
19697 /* Parse the definition of the function given by the DECL_SPECIFIERS,
19698 ATTRIBUTES, and DECLARATOR. The access checks have been deferred;
19699 they must be performed once we are in the scope of the function.
19701 Returns the function defined. */
19704 cp_parser_function_definition_from_specifiers_and_declarator
19705 (cp_parser
* parser
,
19706 cp_decl_specifier_seq
*decl_specifiers
,
19708 const cp_declarator
*declarator
)
19713 /* Begin the function-definition. */
19714 success_p
= start_function (decl_specifiers
, declarator
, attributes
);
19716 /* The things we're about to see are not directly qualified by any
19717 template headers we've seen thus far. */
19718 reset_specialization ();
19720 /* If there were names looked up in the decl-specifier-seq that we
19721 did not check, check them now. We must wait until we are in the
19722 scope of the function to perform the checks, since the function
19723 might be a friend. */
19724 perform_deferred_access_checks ();
19728 /* Skip the entire function. */
19729 cp_parser_skip_to_end_of_block_or_statement (parser
);
19730 fn
= error_mark_node
;
19732 else if (DECL_INITIAL (current_function_decl
) != error_mark_node
)
19734 /* Seen already, skip it. An error message has already been output. */
19735 cp_parser_skip_to_end_of_block_or_statement (parser
);
19736 fn
= current_function_decl
;
19737 current_function_decl
= NULL_TREE
;
19738 /* If this is a function from a class, pop the nested class. */
19739 if (current_class_name
)
19740 pop_nested_class ();
19743 fn
= cp_parser_function_definition_after_declarator (parser
,
19744 /*inline_p=*/false);
19749 /* Parse the part of a function-definition that follows the
19750 declarator. INLINE_P is TRUE iff this function is an inline
19751 function defined within a class-specifier.
19753 Returns the function defined. */
19756 cp_parser_function_definition_after_declarator (cp_parser
* parser
,
19760 bool ctor_initializer_p
= false;
19761 bool saved_in_unbraced_linkage_specification_p
;
19762 bool saved_in_function_body
;
19763 unsigned saved_num_template_parameter_lists
;
19766 saved_in_function_body
= parser
->in_function_body
;
19767 parser
->in_function_body
= true;
19768 /* If the next token is `return', then the code may be trying to
19769 make use of the "named return value" extension that G++ used to
19771 token
= cp_lexer_peek_token (parser
->lexer
);
19772 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_RETURN
))
19774 /* Consume the `return' keyword. */
19775 cp_lexer_consume_token (parser
->lexer
);
19776 /* Look for the identifier that indicates what value is to be
19778 cp_parser_identifier (parser
);
19779 /* Issue an error message. */
19780 error_at (token
->location
,
19781 "named return values are no longer supported");
19782 /* Skip tokens until we reach the start of the function body. */
19785 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
19786 if (token
->type
== CPP_OPEN_BRACE
19787 || token
->type
== CPP_EOF
19788 || token
->type
== CPP_PRAGMA_EOL
)
19790 cp_lexer_consume_token (parser
->lexer
);
19793 /* The `extern' in `extern "C" void f () { ... }' does not apply to
19794 anything declared inside `f'. */
19795 saved_in_unbraced_linkage_specification_p
19796 = parser
->in_unbraced_linkage_specification_p
;
19797 parser
->in_unbraced_linkage_specification_p
= false;
19798 /* Inside the function, surrounding template-parameter-lists do not
19800 saved_num_template_parameter_lists
19801 = parser
->num_template_parameter_lists
;
19802 parser
->num_template_parameter_lists
= 0;
19804 start_lambda_scope (current_function_decl
);
19806 /* If the next token is `try', then we are looking at a
19807 function-try-block. */
19808 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_TRY
))
19809 ctor_initializer_p
= cp_parser_function_try_block (parser
);
19810 /* A function-try-block includes the function-body, so we only do
19811 this next part if we're not processing a function-try-block. */
19814 = cp_parser_ctor_initializer_opt_and_function_body (parser
);
19816 finish_lambda_scope ();
19818 /* Finish the function. */
19819 fn
= finish_function ((ctor_initializer_p
? 1 : 0) |
19820 (inline_p
? 2 : 0));
19821 /* Generate code for it, if necessary. */
19822 expand_or_defer_fn (fn
);
19823 /* Restore the saved values. */
19824 parser
->in_unbraced_linkage_specification_p
19825 = saved_in_unbraced_linkage_specification_p
;
19826 parser
->num_template_parameter_lists
19827 = saved_num_template_parameter_lists
;
19828 parser
->in_function_body
= saved_in_function_body
;
19833 /* Parse a template-declaration, assuming that the `export' (and
19834 `extern') keywords, if present, has already been scanned. MEMBER_P
19835 is as for cp_parser_template_declaration. */
19838 cp_parser_template_declaration_after_export (cp_parser
* parser
, bool member_p
)
19840 tree decl
= NULL_TREE
;
19841 VEC (deferred_access_check
,gc
) *checks
;
19842 tree parameter_list
;
19843 bool friend_p
= false;
19844 bool need_lang_pop
;
19847 /* Look for the `template' keyword. */
19848 token
= cp_lexer_peek_token (parser
->lexer
);
19849 if (!cp_parser_require_keyword (parser
, RID_TEMPLATE
, RT_TEMPLATE
))
19853 if (!cp_parser_require (parser
, CPP_LESS
, RT_LESS
))
19855 if (at_class_scope_p () && current_function_decl
)
19857 /* 14.5.2.2 [temp.mem]
19859 A local class shall not have member templates. */
19860 error_at (token
->location
,
19861 "invalid declaration of member template in local class");
19862 cp_parser_skip_to_end_of_block_or_statement (parser
);
19867 A template ... shall not have C linkage. */
19868 if (current_lang_name
== lang_name_c
)
19870 error_at (token
->location
, "template with C linkage");
19871 /* Give it C++ linkage to avoid confusing other parts of the
19873 push_lang_context (lang_name_cplusplus
);
19874 need_lang_pop
= true;
19877 need_lang_pop
= false;
19879 /* We cannot perform access checks on the template parameter
19880 declarations until we know what is being declared, just as we
19881 cannot check the decl-specifier list. */
19882 push_deferring_access_checks (dk_deferred
);
19884 /* If the next token is `>', then we have an invalid
19885 specialization. Rather than complain about an invalid template
19886 parameter, issue an error message here. */
19887 if (cp_lexer_next_token_is (parser
->lexer
, CPP_GREATER
))
19889 cp_parser_error (parser
, "invalid explicit specialization");
19890 begin_specialization ();
19891 parameter_list
= NULL_TREE
;
19894 /* Parse the template parameters. */
19895 parameter_list
= cp_parser_template_parameter_list (parser
);
19897 /* Get the deferred access checks from the parameter list. These
19898 will be checked once we know what is being declared, as for a
19899 member template the checks must be performed in the scope of the
19900 class containing the member. */
19901 checks
= get_deferred_access_checks ();
19903 /* Look for the `>'. */
19904 cp_parser_skip_to_end_of_template_parameter_list (parser
);
19905 /* We just processed one more parameter list. */
19906 ++parser
->num_template_parameter_lists
;
19907 /* If the next token is `template', there are more template
19909 if (cp_lexer_next_token_is_keyword (parser
->lexer
,
19911 cp_parser_template_declaration_after_export (parser
, member_p
);
19914 /* There are no access checks when parsing a template, as we do not
19915 know if a specialization will be a friend. */
19916 push_deferring_access_checks (dk_no_check
);
19917 token
= cp_lexer_peek_token (parser
->lexer
);
19918 decl
= cp_parser_single_declaration (parser
,
19921 /*explicit_specialization_p=*/false,
19923 pop_deferring_access_checks ();
19925 /* If this is a member template declaration, let the front
19927 if (member_p
&& !friend_p
&& decl
)
19929 if (TREE_CODE (decl
) == TYPE_DECL
)
19930 cp_parser_check_access_in_redeclaration (decl
, token
->location
);
19932 decl
= finish_member_template_decl (decl
);
19934 else if (friend_p
&& decl
&& TREE_CODE (decl
) == TYPE_DECL
)
19935 make_friend_class (current_class_type
, TREE_TYPE (decl
),
19936 /*complain=*/true);
19938 /* We are done with the current parameter list. */
19939 --parser
->num_template_parameter_lists
;
19941 pop_deferring_access_checks ();
19944 finish_template_decl (parameter_list
);
19946 /* Register member declarations. */
19947 if (member_p
&& !friend_p
&& decl
&& !DECL_CLASS_TEMPLATE_P (decl
))
19948 finish_member_declaration (decl
);
19949 /* For the erroneous case of a template with C linkage, we pushed an
19950 implicit C++ linkage scope; exit that scope now. */
19952 pop_lang_context ();
19953 /* If DECL is a function template, we must return to parse it later.
19954 (Even though there is no definition, there might be default
19955 arguments that need handling.) */
19956 if (member_p
&& decl
19957 && (TREE_CODE (decl
) == FUNCTION_DECL
19958 || DECL_FUNCTION_TEMPLATE_P (decl
)))
19959 VEC_safe_push (tree
, gc
, unparsed_funs_with_definitions
, decl
);
19962 /* Perform the deferred access checks from a template-parameter-list.
19963 CHECKS is a TREE_LIST of access checks, as returned by
19964 get_deferred_access_checks. */
19967 cp_parser_perform_template_parameter_access_checks (VEC (deferred_access_check
,gc
)* checks
)
19969 ++processing_template_parmlist
;
19970 perform_access_checks (checks
);
19971 --processing_template_parmlist
;
19974 /* Parse a `decl-specifier-seq [opt] init-declarator [opt] ;' or
19975 `function-definition' sequence. MEMBER_P is true, this declaration
19976 appears in a class scope.
19978 Returns the DECL for the declared entity. If FRIEND_P is non-NULL,
19979 *FRIEND_P is set to TRUE iff the declaration is a friend. */
19982 cp_parser_single_declaration (cp_parser
* parser
,
19983 VEC (deferred_access_check
,gc
)* checks
,
19985 bool explicit_specialization_p
,
19988 int declares_class_or_enum
;
19989 tree decl
= NULL_TREE
;
19990 cp_decl_specifier_seq decl_specifiers
;
19991 bool function_definition_p
= false;
19992 cp_token
*decl_spec_token_start
;
19994 /* This function is only used when processing a template
19996 gcc_assert (innermost_scope_kind () == sk_template_parms
19997 || innermost_scope_kind () == sk_template_spec
);
19999 /* Defer access checks until we know what is being declared. */
20000 push_deferring_access_checks (dk_deferred
);
20002 /* Try the `decl-specifier-seq [opt] init-declarator [opt]'
20004 decl_spec_token_start
= cp_lexer_peek_token (parser
->lexer
);
20005 cp_parser_decl_specifier_seq (parser
,
20006 CP_PARSER_FLAGS_OPTIONAL
,
20008 &declares_class_or_enum
);
20010 *friend_p
= cp_parser_friend_p (&decl_specifiers
);
20012 /* There are no template typedefs. */
20013 if (decl_specifiers
.specs
[(int) ds_typedef
])
20015 error_at (decl_spec_token_start
->location
,
20016 "template declaration of %<typedef%>");
20017 decl
= error_mark_node
;
20020 /* Gather up the access checks that occurred the
20021 decl-specifier-seq. */
20022 stop_deferring_access_checks ();
20024 /* Check for the declaration of a template class. */
20025 if (declares_class_or_enum
)
20027 if (cp_parser_declares_only_class_p (parser
))
20029 decl
= shadow_tag (&decl_specifiers
);
20034 friend template <typename T> struct A<T>::B;
20037 A<T>::B will be represented by a TYPENAME_TYPE, and
20038 therefore not recognized by shadow_tag. */
20039 if (friend_p
&& *friend_p
20041 && decl_specifiers
.type
20042 && TYPE_P (decl_specifiers
.type
))
20043 decl
= decl_specifiers
.type
;
20045 if (decl
&& decl
!= error_mark_node
)
20046 decl
= TYPE_NAME (decl
);
20048 decl
= error_mark_node
;
20050 /* Perform access checks for template parameters. */
20051 cp_parser_perform_template_parameter_access_checks (checks
);
20055 /* Complain about missing 'typename' or other invalid type names. */
20056 if (!decl_specifiers
.any_type_specifiers_p
)
20057 cp_parser_parse_and_diagnose_invalid_type_name (parser
);
20059 /* If it's not a template class, try for a template function. If
20060 the next token is a `;', then this declaration does not declare
20061 anything. But, if there were errors in the decl-specifiers, then
20062 the error might well have come from an attempted class-specifier.
20063 In that case, there's no need to warn about a missing declarator. */
20065 && (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
)
20066 || decl_specifiers
.type
!= error_mark_node
))
20068 decl
= cp_parser_init_declarator (parser
,
20071 /*function_definition_allowed_p=*/true,
20073 declares_class_or_enum
,
20074 &function_definition_p
);
20076 /* 7.1.1-1 [dcl.stc]
20078 A storage-class-specifier shall not be specified in an explicit
20079 specialization... */
20081 && explicit_specialization_p
20082 && decl_specifiers
.storage_class
!= sc_none
)
20084 error_at (decl_spec_token_start
->location
,
20085 "explicit template specialization cannot have a storage class");
20086 decl
= error_mark_node
;
20090 pop_deferring_access_checks ();
20092 /* Clear any current qualification; whatever comes next is the start
20093 of something new. */
20094 parser
->scope
= NULL_TREE
;
20095 parser
->qualifying_scope
= NULL_TREE
;
20096 parser
->object_scope
= NULL_TREE
;
20097 /* Look for a trailing `;' after the declaration. */
20098 if (!function_definition_p
20099 && (decl
== error_mark_node
20100 || !cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
)))
20101 cp_parser_skip_to_end_of_block_or_statement (parser
);
20106 /* Parse a cast-expression that is not the operand of a unary "&". */
20109 cp_parser_simple_cast_expression (cp_parser
*parser
)
20111 return cp_parser_cast_expression (parser
, /*address_p=*/false,
20112 /*cast_p=*/false, NULL
);
20115 /* Parse a functional cast to TYPE. Returns an expression
20116 representing the cast. */
20119 cp_parser_functional_cast (cp_parser
* parser
, tree type
)
20122 tree expression_list
;
20126 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
20128 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
20129 expression_list
= cp_parser_braced_list (parser
, &nonconst_p
);
20130 CONSTRUCTOR_IS_DIRECT_INIT (expression_list
) = 1;
20131 if (TREE_CODE (type
) == TYPE_DECL
)
20132 type
= TREE_TYPE (type
);
20133 return finish_compound_literal (type
, expression_list
);
20137 vec
= cp_parser_parenthesized_expression_list (parser
, non_attr
,
20139 /*allow_expansion_p=*/true,
20140 /*non_constant_p=*/NULL
);
20142 expression_list
= error_mark_node
;
20145 expression_list
= build_tree_list_vec (vec
);
20146 release_tree_vector (vec
);
20149 cast
= build_functional_cast (type
, expression_list
,
20150 tf_warning_or_error
);
20151 /* [expr.const]/1: In an integral constant expression "only type
20152 conversions to integral or enumeration type can be used". */
20153 if (TREE_CODE (type
) == TYPE_DECL
)
20154 type
= TREE_TYPE (type
);
20155 if (cast
!= error_mark_node
20156 && !cast_valid_in_integral_constant_expression_p (type
)
20157 && cp_parser_non_integral_constant_expression (parser
,
20159 return error_mark_node
;
20163 /* Save the tokens that make up the body of a member function defined
20164 in a class-specifier. The DECL_SPECIFIERS and DECLARATOR have
20165 already been parsed. The ATTRIBUTES are any GNU "__attribute__"
20166 specifiers applied to the declaration. Returns the FUNCTION_DECL
20167 for the member function. */
20170 cp_parser_save_member_function_body (cp_parser
* parser
,
20171 cp_decl_specifier_seq
*decl_specifiers
,
20172 cp_declarator
*declarator
,
20179 /* Create the FUNCTION_DECL. */
20180 fn
= grokmethod (decl_specifiers
, declarator
, attributes
);
20181 /* If something went badly wrong, bail out now. */
20182 if (fn
== error_mark_node
)
20184 /* If there's a function-body, skip it. */
20185 if (cp_parser_token_starts_function_definition_p
20186 (cp_lexer_peek_token (parser
->lexer
)))
20187 cp_parser_skip_to_end_of_block_or_statement (parser
);
20188 return error_mark_node
;
20191 /* Remember it, if there default args to post process. */
20192 cp_parser_save_default_args (parser
, fn
);
20194 /* Save away the tokens that make up the body of the
20196 first
= parser
->lexer
->next_token
;
20197 /* We can have braced-init-list mem-initializers before the fn body. */
20198 if (cp_lexer_next_token_is (parser
->lexer
, CPP_COLON
))
20200 cp_lexer_consume_token (parser
->lexer
);
20201 while (cp_lexer_next_token_is_not (parser
->lexer
, CPP_OPEN_BRACE
)
20202 && cp_lexer_next_token_is_not_keyword (parser
->lexer
, RID_TRY
))
20204 /* cache_group will stop after an un-nested { } pair, too. */
20205 if (cp_parser_cache_group (parser
, CPP_CLOSE_PAREN
, /*depth=*/0))
20208 /* variadic mem-inits have ... after the ')'. */
20209 if (cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
20210 cp_lexer_consume_token (parser
->lexer
);
20213 cp_parser_cache_group (parser
, CPP_CLOSE_BRACE
, /*depth=*/0);
20214 /* Handle function try blocks. */
20215 while (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_CATCH
))
20216 cp_parser_cache_group (parser
, CPP_CLOSE_BRACE
, /*depth=*/0);
20217 last
= parser
->lexer
->next_token
;
20219 /* Save away the inline definition; we will process it when the
20220 class is complete. */
20221 DECL_PENDING_INLINE_INFO (fn
) = cp_token_cache_new (first
, last
);
20222 DECL_PENDING_INLINE_P (fn
) = 1;
20224 /* We need to know that this was defined in the class, so that
20225 friend templates are handled correctly. */
20226 DECL_INITIALIZED_IN_CLASS_P (fn
) = 1;
20228 /* Add FN to the queue of functions to be parsed later. */
20229 VEC_safe_push (tree
, gc
, unparsed_funs_with_definitions
, fn
);
20234 /* Parse a template-argument-list, as well as the trailing ">" (but
20235 not the opening ">"). See cp_parser_template_argument_list for the
20239 cp_parser_enclosed_template_argument_list (cp_parser
* parser
)
20243 tree saved_qualifying_scope
;
20244 tree saved_object_scope
;
20245 bool saved_greater_than_is_operator_p
;
20246 int saved_unevaluated_operand
;
20247 int saved_inhibit_evaluation_warnings
;
20251 When parsing a template-id, the first non-nested `>' is taken as
20252 the end of the template-argument-list rather than a greater-than
20254 saved_greater_than_is_operator_p
20255 = parser
->greater_than_is_operator_p
;
20256 parser
->greater_than_is_operator_p
= false;
20257 /* Parsing the argument list may modify SCOPE, so we save it
20259 saved_scope
= parser
->scope
;
20260 saved_qualifying_scope
= parser
->qualifying_scope
;
20261 saved_object_scope
= parser
->object_scope
;
20262 /* We need to evaluate the template arguments, even though this
20263 template-id may be nested within a "sizeof". */
20264 saved_unevaluated_operand
= cp_unevaluated_operand
;
20265 cp_unevaluated_operand
= 0;
20266 saved_inhibit_evaluation_warnings
= c_inhibit_evaluation_warnings
;
20267 c_inhibit_evaluation_warnings
= 0;
20268 /* Parse the template-argument-list itself. */
20269 if (cp_lexer_next_token_is (parser
->lexer
, CPP_GREATER
)
20270 || cp_lexer_next_token_is (parser
->lexer
, CPP_RSHIFT
))
20271 arguments
= NULL_TREE
;
20273 arguments
= cp_parser_template_argument_list (parser
);
20274 /* Look for the `>' that ends the template-argument-list. If we find
20275 a '>>' instead, it's probably just a typo. */
20276 if (cp_lexer_next_token_is (parser
->lexer
, CPP_RSHIFT
))
20278 if (cxx_dialect
!= cxx98
)
20280 /* In C++0x, a `>>' in a template argument list or cast
20281 expression is considered to be two separate `>'
20282 tokens. So, change the current token to a `>', but don't
20283 consume it: it will be consumed later when the outer
20284 template argument list (or cast expression) is parsed.
20285 Note that this replacement of `>' for `>>' is necessary
20286 even if we are parsing tentatively: in the tentative
20287 case, after calling
20288 cp_parser_enclosed_template_argument_list we will always
20289 throw away all of the template arguments and the first
20290 closing `>', either because the template argument list
20291 was erroneous or because we are replacing those tokens
20292 with a CPP_TEMPLATE_ID token. The second `>' (which will
20293 not have been thrown away) is needed either to close an
20294 outer template argument list or to complete a new-style
20296 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
20297 token
->type
= CPP_GREATER
;
20299 else if (!saved_greater_than_is_operator_p
)
20301 /* If we're in a nested template argument list, the '>>' has
20302 to be a typo for '> >'. We emit the error message, but we
20303 continue parsing and we push a '>' as next token, so that
20304 the argument list will be parsed correctly. Note that the
20305 global source location is still on the token before the
20306 '>>', so we need to say explicitly where we want it. */
20307 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
20308 error_at (token
->location
, "%<>>%> should be %<> >%> "
20309 "within a nested template argument list");
20311 token
->type
= CPP_GREATER
;
20315 /* If this is not a nested template argument list, the '>>'
20316 is a typo for '>'. Emit an error message and continue.
20317 Same deal about the token location, but here we can get it
20318 right by consuming the '>>' before issuing the diagnostic. */
20319 cp_token
*token
= cp_lexer_consume_token (parser
->lexer
);
20320 error_at (token
->location
,
20321 "spurious %<>>%>, use %<>%> to terminate "
20322 "a template argument list");
20326 cp_parser_skip_to_end_of_template_parameter_list (parser
);
20327 /* The `>' token might be a greater-than operator again now. */
20328 parser
->greater_than_is_operator_p
20329 = saved_greater_than_is_operator_p
;
20330 /* Restore the SAVED_SCOPE. */
20331 parser
->scope
= saved_scope
;
20332 parser
->qualifying_scope
= saved_qualifying_scope
;
20333 parser
->object_scope
= saved_object_scope
;
20334 cp_unevaluated_operand
= saved_unevaluated_operand
;
20335 c_inhibit_evaluation_warnings
= saved_inhibit_evaluation_warnings
;
20340 /* MEMBER_FUNCTION is a member function, or a friend. If default
20341 arguments, or the body of the function have not yet been parsed,
20345 cp_parser_late_parsing_for_member (cp_parser
* parser
, tree member_function
)
20347 /* If this member is a template, get the underlying
20349 if (DECL_FUNCTION_TEMPLATE_P (member_function
))
20350 member_function
= DECL_TEMPLATE_RESULT (member_function
);
20352 /* There should not be any class definitions in progress at this
20353 point; the bodies of members are only parsed outside of all class
20355 gcc_assert (parser
->num_classes_being_defined
== 0);
20356 /* While we're parsing the member functions we might encounter more
20357 classes. We want to handle them right away, but we don't want
20358 them getting mixed up with functions that are currently in the
20360 push_unparsed_function_queues (parser
);
20362 /* Make sure that any template parameters are in scope. */
20363 maybe_begin_member_template_processing (member_function
);
20365 /* If the body of the function has not yet been parsed, parse it
20367 if (DECL_PENDING_INLINE_P (member_function
))
20369 tree function_scope
;
20370 cp_token_cache
*tokens
;
20372 /* The function is no longer pending; we are processing it. */
20373 tokens
= DECL_PENDING_INLINE_INFO (member_function
);
20374 DECL_PENDING_INLINE_INFO (member_function
) = NULL
;
20375 DECL_PENDING_INLINE_P (member_function
) = 0;
20377 /* If this is a local class, enter the scope of the containing
20379 function_scope
= current_function_decl
;
20380 if (function_scope
)
20381 push_function_context ();
20383 /* Push the body of the function onto the lexer stack. */
20384 cp_parser_push_lexer_for_tokens (parser
, tokens
);
20386 /* Let the front end know that we going to be defining this
20388 start_preparsed_function (member_function
, NULL_TREE
,
20389 SF_PRE_PARSED
| SF_INCLASS_INLINE
);
20391 /* Don't do access checking if it is a templated function. */
20392 if (processing_template_decl
)
20393 push_deferring_access_checks (dk_no_check
);
20395 /* Now, parse the body of the function. */
20396 cp_parser_function_definition_after_declarator (parser
,
20397 /*inline_p=*/true);
20399 if (processing_template_decl
)
20400 pop_deferring_access_checks ();
20402 /* Leave the scope of the containing function. */
20403 if (function_scope
)
20404 pop_function_context ();
20405 cp_parser_pop_lexer (parser
);
20408 /* Remove any template parameters from the symbol table. */
20409 maybe_end_member_template_processing ();
20411 /* Restore the queue. */
20412 pop_unparsed_function_queues (parser
);
20415 /* If DECL contains any default args, remember it on the unparsed
20416 functions queue. */
20419 cp_parser_save_default_args (cp_parser
* parser
, tree decl
)
20423 for (probe
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
20425 probe
= TREE_CHAIN (probe
))
20426 if (TREE_PURPOSE (probe
))
20428 cp_default_arg_entry
*entry
20429 = VEC_safe_push (cp_default_arg_entry
, gc
,
20430 unparsed_funs_with_default_args
, NULL
);
20431 entry
->class_type
= current_class_type
;
20432 entry
->decl
= decl
;
20437 /* FN is a FUNCTION_DECL which may contains a parameter with an
20438 unparsed DEFAULT_ARG. Parse the default args now. This function
20439 assumes that the current scope is the scope in which the default
20440 argument should be processed. */
20443 cp_parser_late_parsing_default_args (cp_parser
*parser
, tree fn
)
20445 bool saved_local_variables_forbidden_p
;
20446 tree parm
, parmdecl
;
20448 /* While we're parsing the default args, we might (due to the
20449 statement expression extension) encounter more classes. We want
20450 to handle them right away, but we don't want them getting mixed
20451 up with default args that are currently in the queue. */
20452 push_unparsed_function_queues (parser
);
20454 /* Local variable names (and the `this' keyword) may not appear
20455 in a default argument. */
20456 saved_local_variables_forbidden_p
= parser
->local_variables_forbidden_p
;
20457 parser
->local_variables_forbidden_p
= true;
20459 for (parm
= TYPE_ARG_TYPES (TREE_TYPE (fn
)),
20460 parmdecl
= DECL_ARGUMENTS (fn
);
20461 parm
&& parm
!= void_list_node
;
20462 parm
= TREE_CHAIN (parm
),
20463 parmdecl
= DECL_CHAIN (parmdecl
))
20465 cp_token_cache
*tokens
;
20466 tree default_arg
= TREE_PURPOSE (parm
);
20468 VEC(tree
,gc
) *insts
;
20475 if (TREE_CODE (default_arg
) != DEFAULT_ARG
)
20476 /* This can happen for a friend declaration for a function
20477 already declared with default arguments. */
20480 /* Push the saved tokens for the default argument onto the parser's
20482 tokens
= DEFARG_TOKENS (default_arg
);
20483 cp_parser_push_lexer_for_tokens (parser
, tokens
);
20485 start_lambda_scope (parmdecl
);
20487 /* Parse the assignment-expression. */
20488 parsed_arg
= cp_parser_assignment_expression (parser
, /*cast_p=*/false, NULL
);
20489 if (parsed_arg
== error_mark_node
)
20491 cp_parser_pop_lexer (parser
);
20495 if (!processing_template_decl
)
20496 parsed_arg
= check_default_argument (TREE_VALUE (parm
), parsed_arg
);
20498 TREE_PURPOSE (parm
) = parsed_arg
;
20500 /* Update any instantiations we've already created. */
20501 for (insts
= DEFARG_INSTANTIATIONS (default_arg
), ix
= 0;
20502 VEC_iterate (tree
, insts
, ix
, copy
); ix
++)
20503 TREE_PURPOSE (copy
) = parsed_arg
;
20505 finish_lambda_scope ();
20507 /* If the token stream has not been completely used up, then
20508 there was extra junk after the end of the default
20510 if (!cp_lexer_next_token_is (parser
->lexer
, CPP_EOF
))
20511 cp_parser_error (parser
, "expected %<,%>");
20513 /* Revert to the main lexer. */
20514 cp_parser_pop_lexer (parser
);
20517 /* Make sure no default arg is missing. */
20518 check_default_args (fn
);
20520 /* Restore the state of local_variables_forbidden_p. */
20521 parser
->local_variables_forbidden_p
= saved_local_variables_forbidden_p
;
20523 /* Restore the queue. */
20524 pop_unparsed_function_queues (parser
);
20527 /* Parse the operand of `sizeof' (or a similar operator). Returns
20528 either a TYPE or an expression, depending on the form of the
20529 input. The KEYWORD indicates which kind of expression we have
20533 cp_parser_sizeof_operand (cp_parser
* parser
, enum rid keyword
)
20535 tree expr
= NULL_TREE
;
20536 const char *saved_message
;
20538 bool saved_integral_constant_expression_p
;
20539 bool saved_non_integral_constant_expression_p
;
20540 bool pack_expansion_p
= false;
20542 /* Types cannot be defined in a `sizeof' expression. Save away the
20544 saved_message
= parser
->type_definition_forbidden_message
;
20545 /* And create the new one. */
20546 tmp
= concat ("types may not be defined in %<",
20547 IDENTIFIER_POINTER (ridpointers
[keyword
]),
20548 "%> expressions", NULL
);
20549 parser
->type_definition_forbidden_message
= tmp
;
20551 /* The restrictions on constant-expressions do not apply inside
20552 sizeof expressions. */
20553 saved_integral_constant_expression_p
20554 = parser
->integral_constant_expression_p
;
20555 saved_non_integral_constant_expression_p
20556 = parser
->non_integral_constant_expression_p
;
20557 parser
->integral_constant_expression_p
= false;
20559 /* If it's a `...', then we are computing the length of a parameter
20561 if (keyword
== RID_SIZEOF
20562 && cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
20564 /* Consume the `...'. */
20565 cp_lexer_consume_token (parser
->lexer
);
20566 maybe_warn_variadic_templates ();
20568 /* Note that this is an expansion. */
20569 pack_expansion_p
= true;
20572 /* Do not actually evaluate the expression. */
20573 ++cp_unevaluated_operand
;
20574 ++c_inhibit_evaluation_warnings
;
20575 /* If it's a `(', then we might be looking at the type-id
20577 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_PAREN
))
20580 bool saved_in_type_id_in_expr_p
;
20582 /* We can't be sure yet whether we're looking at a type-id or an
20584 cp_parser_parse_tentatively (parser
);
20585 /* Consume the `('. */
20586 cp_lexer_consume_token (parser
->lexer
);
20587 /* Parse the type-id. */
20588 saved_in_type_id_in_expr_p
= parser
->in_type_id_in_expr_p
;
20589 parser
->in_type_id_in_expr_p
= true;
20590 type
= cp_parser_type_id (parser
);
20591 parser
->in_type_id_in_expr_p
= saved_in_type_id_in_expr_p
;
20592 /* Now, look for the trailing `)'. */
20593 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
20594 /* If all went well, then we're done. */
20595 if (cp_parser_parse_definitely (parser
))
20597 cp_decl_specifier_seq decl_specs
;
20599 /* Build a trivial decl-specifier-seq. */
20600 clear_decl_specs (&decl_specs
);
20601 decl_specs
.type
= type
;
20603 /* Call grokdeclarator to figure out what type this is. */
20604 expr
= grokdeclarator (NULL
,
20608 /*attrlist=*/NULL
);
20612 /* If the type-id production did not work out, then we must be
20613 looking at the unary-expression production. */
20615 expr
= cp_parser_unary_expression (parser
, /*address_p=*/false,
20616 /*cast_p=*/false, NULL
);
20618 if (pack_expansion_p
)
20619 /* Build a pack expansion. */
20620 expr
= make_pack_expansion (expr
);
20622 /* Go back to evaluating expressions. */
20623 --cp_unevaluated_operand
;
20624 --c_inhibit_evaluation_warnings
;
20626 /* Free the message we created. */
20628 /* And restore the old one. */
20629 parser
->type_definition_forbidden_message
= saved_message
;
20630 parser
->integral_constant_expression_p
20631 = saved_integral_constant_expression_p
;
20632 parser
->non_integral_constant_expression_p
20633 = saved_non_integral_constant_expression_p
;
20638 /* If the current declaration has no declarator, return true. */
20641 cp_parser_declares_only_class_p (cp_parser
*parser
)
20643 /* If the next token is a `;' or a `,' then there is no
20645 return (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
)
20646 || cp_lexer_next_token_is (parser
->lexer
, CPP_COMMA
));
20649 /* Update the DECL_SPECS to reflect the storage class indicated by
20653 cp_parser_set_storage_class (cp_parser
*parser
,
20654 cp_decl_specifier_seq
*decl_specs
,
20656 location_t location
)
20658 cp_storage_class storage_class
;
20660 if (parser
->in_unbraced_linkage_specification_p
)
20662 error_at (location
, "invalid use of %qD in linkage specification",
20663 ridpointers
[keyword
]);
20666 else if (decl_specs
->storage_class
!= sc_none
)
20668 decl_specs
->conflicting_specifiers_p
= true;
20672 if ((keyword
== RID_EXTERN
|| keyword
== RID_STATIC
)
20673 && decl_specs
->specs
[(int) ds_thread
])
20675 error_at (location
, "%<__thread%> before %qD", ridpointers
[keyword
]);
20676 decl_specs
->specs
[(int) ds_thread
] = 0;
20682 storage_class
= sc_auto
;
20685 storage_class
= sc_register
;
20688 storage_class
= sc_static
;
20691 storage_class
= sc_extern
;
20694 storage_class
= sc_mutable
;
20697 gcc_unreachable ();
20699 decl_specs
->storage_class
= storage_class
;
20701 /* A storage class specifier cannot be applied alongside a typedef
20702 specifier. If there is a typedef specifier present then set
20703 conflicting_specifiers_p which will trigger an error later
20704 on in grokdeclarator. */
20705 if (decl_specs
->specs
[(int)ds_typedef
])
20706 decl_specs
->conflicting_specifiers_p
= true;
20709 /* Update the DECL_SPECS to reflect the TYPE_SPEC. If USER_DEFINED_P
20710 is true, the type is a user-defined type; otherwise it is a
20711 built-in type specified by a keyword. */
20714 cp_parser_set_decl_spec_type (cp_decl_specifier_seq
*decl_specs
,
20716 location_t location
,
20717 bool user_defined_p
)
20719 decl_specs
->any_specifiers_p
= true;
20721 /* If the user tries to redeclare bool, char16_t, char32_t, or wchar_t
20722 (with, for example, in "typedef int wchar_t;") we remember that
20723 this is what happened. In system headers, we ignore these
20724 declarations so that G++ can work with system headers that are not
20726 if (decl_specs
->specs
[(int) ds_typedef
]
20728 && (type_spec
== boolean_type_node
20729 || type_spec
== char16_type_node
20730 || type_spec
== char32_type_node
20731 || type_spec
== wchar_type_node
)
20732 && (decl_specs
->type
20733 || decl_specs
->specs
[(int) ds_long
]
20734 || decl_specs
->specs
[(int) ds_short
]
20735 || decl_specs
->specs
[(int) ds_unsigned
]
20736 || decl_specs
->specs
[(int) ds_signed
]))
20738 decl_specs
->redefined_builtin_type
= type_spec
;
20739 if (!decl_specs
->type
)
20741 decl_specs
->type
= type_spec
;
20742 decl_specs
->user_defined_type_p
= false;
20743 decl_specs
->type_location
= location
;
20746 else if (decl_specs
->type
)
20747 decl_specs
->multiple_types_p
= true;
20750 decl_specs
->type
= type_spec
;
20751 decl_specs
->user_defined_type_p
= user_defined_p
;
20752 decl_specs
->redefined_builtin_type
= NULL_TREE
;
20753 decl_specs
->type_location
= location
;
20757 /* DECL_SPECIFIERS is the representation of a decl-specifier-seq.
20758 Returns TRUE iff `friend' appears among the DECL_SPECIFIERS. */
20761 cp_parser_friend_p (const cp_decl_specifier_seq
*decl_specifiers
)
20763 return decl_specifiers
->specs
[(int) ds_friend
] != 0;
20766 /* Issue an error message indicating that TOKEN_DESC was expected.
20767 If KEYWORD is true, it indicated this function is called by
20768 cp_parser_require_keword and the required token can only be
20769 a indicated keyword. */
20772 cp_parser_required_error (cp_parser
*parser
,
20773 required_token token_desc
,
20776 switch (token_desc
)
20779 cp_parser_error (parser
, "expected %<new%>");
20782 cp_parser_error (parser
, "expected %<delete%>");
20785 cp_parser_error (parser
, "expected %<return%>");
20788 cp_parser_error (parser
, "expected %<while%>");
20791 cp_parser_error (parser
, "expected %<extern%>");
20793 case RT_STATIC_ASSERT
:
20794 cp_parser_error (parser
, "expected %<static_assert%>");
20797 cp_parser_error (parser
, "expected %<decltype%>");
20800 cp_parser_error (parser
, "expected %<operator%>");
20803 cp_parser_error (parser
, "expected %<class%>");
20806 cp_parser_error (parser
, "expected %<template%>");
20809 cp_parser_error (parser
, "expected %<namespace%>");
20812 cp_parser_error (parser
, "expected %<using%>");
20815 cp_parser_error (parser
, "expected %<asm%>");
20818 cp_parser_error (parser
, "expected %<try%>");
20821 cp_parser_error (parser
, "expected %<catch%>");
20824 cp_parser_error (parser
, "expected %<throw%>");
20827 cp_parser_error (parser
, "expected %<__label__%>");
20830 cp_parser_error (parser
, "expected %<@try%>");
20832 case RT_AT_SYNCHRONIZED
:
20833 cp_parser_error (parser
, "expected %<@synchronized%>");
20836 cp_parser_error (parser
, "expected %<@throw%>");
20843 switch (token_desc
)
20846 cp_parser_error (parser
, "expected %<;%>");
20848 case RT_OPEN_PAREN
:
20849 cp_parser_error (parser
, "expected %<(%>");
20851 case RT_CLOSE_BRACE
:
20852 cp_parser_error (parser
, "expected %<}%>");
20854 case RT_OPEN_BRACE
:
20855 cp_parser_error (parser
, "expected %<{%>");
20857 case RT_CLOSE_SQUARE
:
20858 cp_parser_error (parser
, "expected %<]%>");
20860 case RT_OPEN_SQUARE
:
20861 cp_parser_error (parser
, "expected %<[%>");
20864 cp_parser_error (parser
, "expected %<,%>");
20867 cp_parser_error (parser
, "expected %<::%>");
20870 cp_parser_error (parser
, "expected %<<%>");
20873 cp_parser_error (parser
, "expected %<>%>");
20876 cp_parser_error (parser
, "expected %<=%>");
20879 cp_parser_error (parser
, "expected %<...%>");
20882 cp_parser_error (parser
, "expected %<*%>");
20885 cp_parser_error (parser
, "expected %<~%>");
20888 cp_parser_error (parser
, "expected %<:%>");
20890 case RT_COLON_SCOPE
:
20891 cp_parser_error (parser
, "expected %<:%> or %<::%>");
20893 case RT_CLOSE_PAREN
:
20894 cp_parser_error (parser
, "expected %<)%>");
20896 case RT_COMMA_CLOSE_PAREN
:
20897 cp_parser_error (parser
, "expected %<,%> or %<)%>");
20899 case RT_PRAGMA_EOL
:
20900 cp_parser_error (parser
, "expected end of line");
20903 cp_parser_error (parser
, "expected identifier");
20906 cp_parser_error (parser
, "expected selection-statement");
20908 case RT_INTERATION
:
20909 cp_parser_error (parser
, "expected iteration-statement");
20912 cp_parser_error (parser
, "expected jump-statement");
20915 cp_parser_error (parser
, "expected class-key");
20917 case RT_CLASS_TYPENAME_TEMPLATE
:
20918 cp_parser_error (parser
,
20919 "expected %<class%>, %<typename%>, or %<template%>");
20922 gcc_unreachable ();
20926 gcc_unreachable ();
20931 /* If the next token is of the indicated TYPE, consume it. Otherwise,
20932 issue an error message indicating that TOKEN_DESC was expected.
20934 Returns the token consumed, if the token had the appropriate type.
20935 Otherwise, returns NULL. */
20938 cp_parser_require (cp_parser
* parser
,
20939 enum cpp_ttype type
,
20940 required_token token_desc
)
20942 if (cp_lexer_next_token_is (parser
->lexer
, type
))
20943 return cp_lexer_consume_token (parser
->lexer
);
20946 /* Output the MESSAGE -- unless we're parsing tentatively. */
20947 if (!cp_parser_simulate_error (parser
))
20948 cp_parser_required_error (parser
, token_desc
, /*keyword=*/false);
20953 /* An error message is produced if the next token is not '>'.
20954 All further tokens are skipped until the desired token is
20955 found or '{', '}', ';' or an unbalanced ')' or ']'. */
20958 cp_parser_skip_to_end_of_template_parameter_list (cp_parser
* parser
)
20960 /* Current level of '< ... >'. */
20961 unsigned level
= 0;
20962 /* Ignore '<' and '>' nested inside '( ... )' or '[ ... ]'. */
20963 unsigned nesting_depth
= 0;
20965 /* Are we ready, yet? If not, issue error message. */
20966 if (cp_parser_require (parser
, CPP_GREATER
, RT_GREATER
))
20969 /* Skip tokens until the desired token is found. */
20972 /* Peek at the next token. */
20973 switch (cp_lexer_peek_token (parser
->lexer
)->type
)
20976 if (!nesting_depth
)
20981 if (cxx_dialect
== cxx98
)
20982 /* C++0x views the `>>' operator as two `>' tokens, but
20985 else if (!nesting_depth
&& level
-- == 0)
20987 /* We've hit a `>>' where the first `>' closes the
20988 template argument list, and the second `>' is
20989 spurious. Just consume the `>>' and stop; we've
20990 already produced at least one error. */
20991 cp_lexer_consume_token (parser
->lexer
);
20994 /* Fall through for C++0x, so we handle the second `>' in
20998 if (!nesting_depth
&& level
-- == 0)
21000 /* We've reached the token we want, consume it and stop. */
21001 cp_lexer_consume_token (parser
->lexer
);
21006 case CPP_OPEN_PAREN
:
21007 case CPP_OPEN_SQUARE
:
21011 case CPP_CLOSE_PAREN
:
21012 case CPP_CLOSE_SQUARE
:
21013 if (nesting_depth
-- == 0)
21018 case CPP_PRAGMA_EOL
:
21019 case CPP_SEMICOLON
:
21020 case CPP_OPEN_BRACE
:
21021 case CPP_CLOSE_BRACE
:
21022 /* The '>' was probably forgotten, don't look further. */
21029 /* Consume this token. */
21030 cp_lexer_consume_token (parser
->lexer
);
21034 /* If the next token is the indicated keyword, consume it. Otherwise,
21035 issue an error message indicating that TOKEN_DESC was expected.
21037 Returns the token consumed, if the token had the appropriate type.
21038 Otherwise, returns NULL. */
21041 cp_parser_require_keyword (cp_parser
* parser
,
21043 required_token token_desc
)
21045 cp_token
*token
= cp_parser_require (parser
, CPP_KEYWORD
, token_desc
);
21047 if (token
&& token
->keyword
!= keyword
)
21049 cp_parser_required_error (parser
, token_desc
, /*keyword=*/true);
21056 /* Returns TRUE iff TOKEN is a token that can begin the body of a
21057 function-definition. */
21060 cp_parser_token_starts_function_definition_p (cp_token
* token
)
21062 return (/* An ordinary function-body begins with an `{'. */
21063 token
->type
== CPP_OPEN_BRACE
21064 /* A ctor-initializer begins with a `:'. */
21065 || token
->type
== CPP_COLON
21066 /* A function-try-block begins with `try'. */
21067 || token
->keyword
== RID_TRY
21068 /* The named return value extension begins with `return'. */
21069 || token
->keyword
== RID_RETURN
);
21072 /* Returns TRUE iff the next token is the ":" or "{" beginning a class
21076 cp_parser_next_token_starts_class_definition_p (cp_parser
*parser
)
21080 token
= cp_lexer_peek_token (parser
->lexer
);
21081 return (token
->type
== CPP_OPEN_BRACE
|| token
->type
== CPP_COLON
);
21084 /* Returns TRUE iff the next token is the "," or ">" (or `>>', in
21085 C++0x) ending a template-argument. */
21088 cp_parser_next_token_ends_template_argument_p (cp_parser
*parser
)
21092 token
= cp_lexer_peek_token (parser
->lexer
);
21093 return (token
->type
== CPP_COMMA
21094 || token
->type
== CPP_GREATER
21095 || token
->type
== CPP_ELLIPSIS
21096 || ((cxx_dialect
!= cxx98
) && token
->type
== CPP_RSHIFT
));
21099 /* Returns TRUE iff the n-th token is a "<", or the n-th is a "[" and the
21100 (n+1)-th is a ":" (which is a possible digraph typo for "< ::"). */
21103 cp_parser_nth_token_starts_template_argument_list_p (cp_parser
* parser
,
21108 token
= cp_lexer_peek_nth_token (parser
->lexer
, n
);
21109 if (token
->type
== CPP_LESS
)
21111 /* Check for the sequence `<::' in the original code. It would be lexed as
21112 `[:', where `[' is a digraph, and there is no whitespace before
21114 if (token
->type
== CPP_OPEN_SQUARE
&& token
->flags
& DIGRAPH
)
21117 token2
= cp_lexer_peek_nth_token (parser
->lexer
, n
+1);
21118 if (token2
->type
== CPP_COLON
&& !(token2
->flags
& PREV_WHITE
))
21124 /* Returns the kind of tag indicated by TOKEN, if it is a class-key,
21125 or none_type otherwise. */
21127 static enum tag_types
21128 cp_parser_token_is_class_key (cp_token
* token
)
21130 switch (token
->keyword
)
21135 return record_type
;
21144 /* Issue an error message if the CLASS_KEY does not match the TYPE. */
21147 cp_parser_check_class_key (enum tag_types class_key
, tree type
)
21149 if ((TREE_CODE (type
) == UNION_TYPE
) != (class_key
== union_type
))
21150 permerror (input_location
, "%qs tag used in naming %q#T",
21151 class_key
== union_type
? "union"
21152 : class_key
== record_type
? "struct" : "class",
21156 /* Issue an error message if DECL is redeclared with different
21157 access than its original declaration [class.access.spec/3].
21158 This applies to nested classes and nested class templates.
21162 cp_parser_check_access_in_redeclaration (tree decl
, location_t location
)
21164 if (!decl
|| !CLASS_TYPE_P (TREE_TYPE (decl
)))
21167 if ((TREE_PRIVATE (decl
)
21168 != (current_access_specifier
== access_private_node
))
21169 || (TREE_PROTECTED (decl
)
21170 != (current_access_specifier
== access_protected_node
)))
21171 error_at (location
, "%qD redeclared with different access", decl
);
21174 /* Look for the `template' keyword, as a syntactic disambiguator.
21175 Return TRUE iff it is present, in which case it will be
21179 cp_parser_optional_template_keyword (cp_parser
*parser
)
21181 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_TEMPLATE
))
21183 /* The `template' keyword can only be used within templates;
21184 outside templates the parser can always figure out what is a
21185 template and what is not. */
21186 if (!processing_template_decl
)
21188 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
21189 error_at (token
->location
,
21190 "%<template%> (as a disambiguator) is only allowed "
21191 "within templates");
21192 /* If this part of the token stream is rescanned, the same
21193 error message would be generated. So, we purge the token
21194 from the stream. */
21195 cp_lexer_purge_token (parser
->lexer
);
21200 /* Consume the `template' keyword. */
21201 cp_lexer_consume_token (parser
->lexer
);
21209 /* The next token is a CPP_NESTED_NAME_SPECIFIER. Consume the token,
21210 set PARSER->SCOPE, and perform other related actions. */
21213 cp_parser_pre_parsed_nested_name_specifier (cp_parser
*parser
)
21216 struct tree_check
*check_value
;
21217 deferred_access_check
*chk
;
21218 VEC (deferred_access_check
,gc
) *checks
;
21220 /* Get the stored value. */
21221 check_value
= cp_lexer_consume_token (parser
->lexer
)->u
.tree_check_value
;
21222 /* Perform any access checks that were deferred. */
21223 checks
= check_value
->checks
;
21226 FOR_EACH_VEC_ELT (deferred_access_check
, checks
, i
, chk
)
21227 perform_or_defer_access_check (chk
->binfo
,
21231 /* Set the scope from the stored value. */
21232 parser
->scope
= check_value
->value
;
21233 parser
->qualifying_scope
= check_value
->qualifying_scope
;
21234 parser
->object_scope
= NULL_TREE
;
21237 /* Consume tokens up through a non-nested END token. Returns TRUE if we
21238 encounter the end of a block before what we were looking for. */
21241 cp_parser_cache_group (cp_parser
*parser
,
21242 enum cpp_ttype end
,
21247 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
21249 /* Abort a parenthesized expression if we encounter a semicolon. */
21250 if ((end
== CPP_CLOSE_PAREN
|| depth
== 0)
21251 && token
->type
== CPP_SEMICOLON
)
21253 /* If we've reached the end of the file, stop. */
21254 if (token
->type
== CPP_EOF
21255 || (end
!= CPP_PRAGMA_EOL
21256 && token
->type
== CPP_PRAGMA_EOL
))
21258 if (token
->type
== CPP_CLOSE_BRACE
&& depth
== 0)
21259 /* We've hit the end of an enclosing block, so there's been some
21260 kind of syntax error. */
21263 /* Consume the token. */
21264 cp_lexer_consume_token (parser
->lexer
);
21265 /* See if it starts a new group. */
21266 if (token
->type
== CPP_OPEN_BRACE
)
21268 cp_parser_cache_group (parser
, CPP_CLOSE_BRACE
, depth
+ 1);
21269 /* In theory this should probably check end == '}', but
21270 cp_parser_save_member_function_body needs it to exit
21271 after either '}' or ')' when called with ')'. */
21275 else if (token
->type
== CPP_OPEN_PAREN
)
21277 cp_parser_cache_group (parser
, CPP_CLOSE_PAREN
, depth
+ 1);
21278 if (depth
== 0 && end
== CPP_CLOSE_PAREN
)
21281 else if (token
->type
== CPP_PRAGMA
)
21282 cp_parser_cache_group (parser
, CPP_PRAGMA_EOL
, depth
+ 1);
21283 else if (token
->type
== end
)
21288 /* Begin parsing tentatively. We always save tokens while parsing
21289 tentatively so that if the tentative parsing fails we can restore the
21293 cp_parser_parse_tentatively (cp_parser
* parser
)
21295 /* Enter a new parsing context. */
21296 parser
->context
= cp_parser_context_new (parser
->context
);
21297 /* Begin saving tokens. */
21298 cp_lexer_save_tokens (parser
->lexer
);
21299 /* In order to avoid repetitive access control error messages,
21300 access checks are queued up until we are no longer parsing
21302 push_deferring_access_checks (dk_deferred
);
21305 /* Commit to the currently active tentative parse. */
21308 cp_parser_commit_to_tentative_parse (cp_parser
* parser
)
21310 cp_parser_context
*context
;
21313 /* Mark all of the levels as committed. */
21314 lexer
= parser
->lexer
;
21315 for (context
= parser
->context
; context
->next
; context
= context
->next
)
21317 if (context
->status
== CP_PARSER_STATUS_KIND_COMMITTED
)
21319 context
->status
= CP_PARSER_STATUS_KIND_COMMITTED
;
21320 while (!cp_lexer_saving_tokens (lexer
))
21321 lexer
= lexer
->next
;
21322 cp_lexer_commit_tokens (lexer
);
21326 /* Abort the currently active tentative parse. All consumed tokens
21327 will be rolled back, and no diagnostics will be issued. */
21330 cp_parser_abort_tentative_parse (cp_parser
* parser
)
21332 cp_parser_simulate_error (parser
);
21333 /* Now, pretend that we want to see if the construct was
21334 successfully parsed. */
21335 cp_parser_parse_definitely (parser
);
21338 /* Stop parsing tentatively. If a parse error has occurred, restore the
21339 token stream. Otherwise, commit to the tokens we have consumed.
21340 Returns true if no error occurred; false otherwise. */
21343 cp_parser_parse_definitely (cp_parser
* parser
)
21345 bool error_occurred
;
21346 cp_parser_context
*context
;
21348 /* Remember whether or not an error occurred, since we are about to
21349 destroy that information. */
21350 error_occurred
= cp_parser_error_occurred (parser
);
21351 /* Remove the topmost context from the stack. */
21352 context
= parser
->context
;
21353 parser
->context
= context
->next
;
21354 /* If no parse errors occurred, commit to the tentative parse. */
21355 if (!error_occurred
)
21357 /* Commit to the tokens read tentatively, unless that was
21359 if (context
->status
!= CP_PARSER_STATUS_KIND_COMMITTED
)
21360 cp_lexer_commit_tokens (parser
->lexer
);
21362 pop_to_parent_deferring_access_checks ();
21364 /* Otherwise, if errors occurred, roll back our state so that things
21365 are just as they were before we began the tentative parse. */
21368 cp_lexer_rollback_tokens (parser
->lexer
);
21369 pop_deferring_access_checks ();
21371 /* Add the context to the front of the free list. */
21372 context
->next
= cp_parser_context_free_list
;
21373 cp_parser_context_free_list
= context
;
21375 return !error_occurred
;
21378 /* Returns true if we are parsing tentatively and are not committed to
21379 this tentative parse. */
21382 cp_parser_uncommitted_to_tentative_parse_p (cp_parser
* parser
)
21384 return (cp_parser_parsing_tentatively (parser
)
21385 && parser
->context
->status
!= CP_PARSER_STATUS_KIND_COMMITTED
);
21388 /* Returns nonzero iff an error has occurred during the most recent
21389 tentative parse. */
21392 cp_parser_error_occurred (cp_parser
* parser
)
21394 return (cp_parser_parsing_tentatively (parser
)
21395 && parser
->context
->status
== CP_PARSER_STATUS_KIND_ERROR
);
21398 /* Returns nonzero if GNU extensions are allowed. */
21401 cp_parser_allow_gnu_extensions_p (cp_parser
* parser
)
21403 return parser
->allow_gnu_extensions_p
;
21406 /* Objective-C++ Productions */
21409 /* Parse an Objective-C expression, which feeds into a primary-expression
21413 objc-message-expression
21414 objc-string-literal
21415 objc-encode-expression
21416 objc-protocol-expression
21417 objc-selector-expression
21419 Returns a tree representation of the expression. */
21422 cp_parser_objc_expression (cp_parser
* parser
)
21424 /* Try to figure out what kind of declaration is present. */
21425 cp_token
*kwd
= cp_lexer_peek_token (parser
->lexer
);
21429 case CPP_OPEN_SQUARE
:
21430 return cp_parser_objc_message_expression (parser
);
21432 case CPP_OBJC_STRING
:
21433 kwd
= cp_lexer_consume_token (parser
->lexer
);
21434 return objc_build_string_object (kwd
->u
.value
);
21437 switch (kwd
->keyword
)
21439 case RID_AT_ENCODE
:
21440 return cp_parser_objc_encode_expression (parser
);
21442 case RID_AT_PROTOCOL
:
21443 return cp_parser_objc_protocol_expression (parser
);
21445 case RID_AT_SELECTOR
:
21446 return cp_parser_objc_selector_expression (parser
);
21452 error_at (kwd
->location
,
21453 "misplaced %<@%D%> Objective-C++ construct",
21455 cp_parser_skip_to_end_of_block_or_statement (parser
);
21458 return error_mark_node
;
21461 /* Parse an Objective-C message expression.
21463 objc-message-expression:
21464 [ objc-message-receiver objc-message-args ]
21466 Returns a representation of an Objective-C message. */
21469 cp_parser_objc_message_expression (cp_parser
* parser
)
21471 tree receiver
, messageargs
;
21473 cp_lexer_consume_token (parser
->lexer
); /* Eat '['. */
21474 receiver
= cp_parser_objc_message_receiver (parser
);
21475 messageargs
= cp_parser_objc_message_args (parser
);
21476 cp_parser_require (parser
, CPP_CLOSE_SQUARE
, RT_CLOSE_SQUARE
);
21478 return objc_build_message_expr (build_tree_list (receiver
, messageargs
));
21481 /* Parse an objc-message-receiver.
21483 objc-message-receiver:
21485 simple-type-specifier
21487 Returns a representation of the type or expression. */
21490 cp_parser_objc_message_receiver (cp_parser
* parser
)
21494 /* An Objective-C message receiver may be either (1) a type
21495 or (2) an expression. */
21496 cp_parser_parse_tentatively (parser
);
21497 rcv
= cp_parser_expression (parser
, false, NULL
);
21499 if (cp_parser_parse_definitely (parser
))
21502 rcv
= cp_parser_simple_type_specifier (parser
,
21503 /*decl_specs=*/NULL
,
21504 CP_PARSER_FLAGS_NONE
);
21506 return objc_get_class_reference (rcv
);
21509 /* Parse the arguments and selectors comprising an Objective-C message.
21514 objc-selector-args , objc-comma-args
21516 objc-selector-args:
21517 objc-selector [opt] : assignment-expression
21518 objc-selector-args objc-selector [opt] : assignment-expression
21521 assignment-expression
21522 objc-comma-args , assignment-expression
21524 Returns a TREE_LIST, with TREE_PURPOSE containing a list of
21525 selector arguments and TREE_VALUE containing a list of comma
21529 cp_parser_objc_message_args (cp_parser
* parser
)
21531 tree sel_args
= NULL_TREE
, addl_args
= NULL_TREE
;
21532 bool maybe_unary_selector_p
= true;
21533 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
21535 while (cp_parser_objc_selector_p (token
->type
) || token
->type
== CPP_COLON
)
21537 tree selector
= NULL_TREE
, arg
;
21539 if (token
->type
!= CPP_COLON
)
21540 selector
= cp_parser_objc_selector (parser
);
21542 /* Detect if we have a unary selector. */
21543 if (maybe_unary_selector_p
21544 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_COLON
))
21545 return build_tree_list (selector
, NULL_TREE
);
21547 maybe_unary_selector_p
= false;
21548 cp_parser_require (parser
, CPP_COLON
, RT_COLON
);
21549 arg
= cp_parser_assignment_expression (parser
, false, NULL
);
21552 = chainon (sel_args
,
21553 build_tree_list (selector
, arg
));
21555 token
= cp_lexer_peek_token (parser
->lexer
);
21558 /* Handle non-selector arguments, if any. */
21559 while (token
->type
== CPP_COMMA
)
21563 cp_lexer_consume_token (parser
->lexer
);
21564 arg
= cp_parser_assignment_expression (parser
, false, NULL
);
21567 = chainon (addl_args
,
21568 build_tree_list (NULL_TREE
, arg
));
21570 token
= cp_lexer_peek_token (parser
->lexer
);
21573 if (sel_args
== NULL_TREE
&& addl_args
== NULL_TREE
)
21575 cp_parser_error (parser
, "objective-c++ message argument(s) are expected");
21576 return build_tree_list (error_mark_node
, error_mark_node
);
21579 return build_tree_list (sel_args
, addl_args
);
21582 /* Parse an Objective-C encode expression.
21584 objc-encode-expression:
21585 @encode objc-typename
21587 Returns an encoded representation of the type argument. */
21590 cp_parser_objc_encode_expression (cp_parser
* parser
)
21595 cp_lexer_consume_token (parser
->lexer
); /* Eat '@encode'. */
21596 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
21597 token
= cp_lexer_peek_token (parser
->lexer
);
21598 type
= complete_type (cp_parser_type_id (parser
));
21599 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
21603 error_at (token
->location
,
21604 "%<@encode%> must specify a type as an argument");
21605 return error_mark_node
;
21608 /* This happens if we find @encode(T) (where T is a template
21609 typename or something dependent on a template typename) when
21610 parsing a template. In that case, we can't compile it
21611 immediately, but we rather create an AT_ENCODE_EXPR which will
21612 need to be instantiated when the template is used.
21614 if (dependent_type_p (type
))
21616 tree value
= build_min (AT_ENCODE_EXPR
, size_type_node
, type
);
21617 TREE_READONLY (value
) = 1;
21621 return objc_build_encode_expr (type
);
21624 /* Parse an Objective-C @defs expression. */
21627 cp_parser_objc_defs_expression (cp_parser
*parser
)
21631 cp_lexer_consume_token (parser
->lexer
); /* Eat '@defs'. */
21632 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
21633 name
= cp_parser_identifier (parser
);
21634 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
21636 return objc_get_class_ivars (name
);
21639 /* Parse an Objective-C protocol expression.
21641 objc-protocol-expression:
21642 @protocol ( identifier )
21644 Returns a representation of the protocol expression. */
21647 cp_parser_objc_protocol_expression (cp_parser
* parser
)
21651 cp_lexer_consume_token (parser
->lexer
); /* Eat '@protocol'. */
21652 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
21653 proto
= cp_parser_identifier (parser
);
21654 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
21656 return objc_build_protocol_expr (proto
);
21659 /* Parse an Objective-C selector expression.
21661 objc-selector-expression:
21662 @selector ( objc-method-signature )
21664 objc-method-signature:
21670 objc-selector-seq objc-selector :
21672 Returns a representation of the method selector. */
21675 cp_parser_objc_selector_expression (cp_parser
* parser
)
21677 tree sel_seq
= NULL_TREE
;
21678 bool maybe_unary_selector_p
= true;
21680 location_t loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
21682 cp_lexer_consume_token (parser
->lexer
); /* Eat '@selector'. */
21683 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
21684 token
= cp_lexer_peek_token (parser
->lexer
);
21686 while (cp_parser_objc_selector_p (token
->type
) || token
->type
== CPP_COLON
21687 || token
->type
== CPP_SCOPE
)
21689 tree selector
= NULL_TREE
;
21691 if (token
->type
!= CPP_COLON
21692 || token
->type
== CPP_SCOPE
)
21693 selector
= cp_parser_objc_selector (parser
);
21695 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COLON
)
21696 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_SCOPE
))
21698 /* Detect if we have a unary selector. */
21699 if (maybe_unary_selector_p
)
21701 sel_seq
= selector
;
21702 goto finish_selector
;
21706 cp_parser_error (parser
, "expected %<:%>");
21709 maybe_unary_selector_p
= false;
21710 token
= cp_lexer_consume_token (parser
->lexer
);
21712 if (token
->type
== CPP_SCOPE
)
21715 = chainon (sel_seq
,
21716 build_tree_list (selector
, NULL_TREE
));
21718 = chainon (sel_seq
,
21719 build_tree_list (NULL_TREE
, NULL_TREE
));
21723 = chainon (sel_seq
,
21724 build_tree_list (selector
, NULL_TREE
));
21726 token
= cp_lexer_peek_token (parser
->lexer
);
21730 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
21732 return objc_build_selector_expr (loc
, sel_seq
);
21735 /* Parse a list of identifiers.
21737 objc-identifier-list:
21739 objc-identifier-list , identifier
21741 Returns a TREE_LIST of identifier nodes. */
21744 cp_parser_objc_identifier_list (cp_parser
* parser
)
21750 identifier
= cp_parser_identifier (parser
);
21751 if (identifier
== error_mark_node
)
21752 return error_mark_node
;
21754 list
= build_tree_list (NULL_TREE
, identifier
);
21755 sep
= cp_lexer_peek_token (parser
->lexer
);
21757 while (sep
->type
== CPP_COMMA
)
21759 cp_lexer_consume_token (parser
->lexer
); /* Eat ','. */
21760 identifier
= cp_parser_identifier (parser
);
21761 if (identifier
== error_mark_node
)
21764 list
= chainon (list
, build_tree_list (NULL_TREE
,
21766 sep
= cp_lexer_peek_token (parser
->lexer
);
21772 /* Parse an Objective-C alias declaration.
21774 objc-alias-declaration:
21775 @compatibility_alias identifier identifier ;
21777 This function registers the alias mapping with the Objective-C front end.
21778 It returns nothing. */
21781 cp_parser_objc_alias_declaration (cp_parser
* parser
)
21785 cp_lexer_consume_token (parser
->lexer
); /* Eat '@compatibility_alias'. */
21786 alias
= cp_parser_identifier (parser
);
21787 orig
= cp_parser_identifier (parser
);
21788 objc_declare_alias (alias
, orig
);
21789 cp_parser_consume_semicolon_at_end_of_statement (parser
);
21792 /* Parse an Objective-C class forward-declaration.
21794 objc-class-declaration:
21795 @class objc-identifier-list ;
21797 The function registers the forward declarations with the Objective-C
21798 front end. It returns nothing. */
21801 cp_parser_objc_class_declaration (cp_parser
* parser
)
21803 cp_lexer_consume_token (parser
->lexer
); /* Eat '@class'. */
21804 objc_declare_class (cp_parser_objc_identifier_list (parser
));
21805 cp_parser_consume_semicolon_at_end_of_statement (parser
);
21808 /* Parse a list of Objective-C protocol references.
21810 objc-protocol-refs-opt:
21811 objc-protocol-refs [opt]
21813 objc-protocol-refs:
21814 < objc-identifier-list >
21816 Returns a TREE_LIST of identifiers, if any. */
21819 cp_parser_objc_protocol_refs_opt (cp_parser
* parser
)
21821 tree protorefs
= NULL_TREE
;
21823 if(cp_lexer_next_token_is (parser
->lexer
, CPP_LESS
))
21825 cp_lexer_consume_token (parser
->lexer
); /* Eat '<'. */
21826 protorefs
= cp_parser_objc_identifier_list (parser
);
21827 cp_parser_require (parser
, CPP_GREATER
, RT_GREATER
);
21833 /* Parse a Objective-C visibility specification. */
21836 cp_parser_objc_visibility_spec (cp_parser
* parser
)
21838 cp_token
*vis
= cp_lexer_peek_token (parser
->lexer
);
21840 switch (vis
->keyword
)
21842 case RID_AT_PRIVATE
:
21843 objc_set_visibility (OBJC_IVAR_VIS_PRIVATE
);
21845 case RID_AT_PROTECTED
:
21846 objc_set_visibility (OBJC_IVAR_VIS_PROTECTED
);
21848 case RID_AT_PUBLIC
:
21849 objc_set_visibility (OBJC_IVAR_VIS_PUBLIC
);
21851 case RID_AT_PACKAGE
:
21852 objc_set_visibility (OBJC_IVAR_VIS_PACKAGE
);
21858 /* Eat '@private'/'@protected'/'@public'. */
21859 cp_lexer_consume_token (parser
->lexer
);
21862 /* Parse an Objective-C method type. Return 'true' if it is a class
21863 (+) method, and 'false' if it is an instance (-) method. */
21866 cp_parser_objc_method_type (cp_parser
* parser
)
21868 if (cp_lexer_consume_token (parser
->lexer
)->type
== CPP_PLUS
)
21874 /* Parse an Objective-C protocol qualifier. */
21877 cp_parser_objc_protocol_qualifiers (cp_parser
* parser
)
21879 tree quals
= NULL_TREE
, node
;
21880 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
21882 node
= token
->u
.value
;
21884 while (node
&& TREE_CODE (node
) == IDENTIFIER_NODE
21885 && (node
== ridpointers
[(int) RID_IN
]
21886 || node
== ridpointers
[(int) RID_OUT
]
21887 || node
== ridpointers
[(int) RID_INOUT
]
21888 || node
== ridpointers
[(int) RID_BYCOPY
]
21889 || node
== ridpointers
[(int) RID_BYREF
]
21890 || node
== ridpointers
[(int) RID_ONEWAY
]))
21892 quals
= tree_cons (NULL_TREE
, node
, quals
);
21893 cp_lexer_consume_token (parser
->lexer
);
21894 token
= cp_lexer_peek_token (parser
->lexer
);
21895 node
= token
->u
.value
;
21901 /* Parse an Objective-C typename. */
21904 cp_parser_objc_typename (cp_parser
* parser
)
21906 tree type_name
= NULL_TREE
;
21908 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_PAREN
))
21910 tree proto_quals
, cp_type
= NULL_TREE
;
21912 cp_lexer_consume_token (parser
->lexer
); /* Eat '('. */
21913 proto_quals
= cp_parser_objc_protocol_qualifiers (parser
);
21915 /* An ObjC type name may consist of just protocol qualifiers, in which
21916 case the type shall default to 'id'. */
21917 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_CLOSE_PAREN
))
21919 cp_type
= cp_parser_type_id (parser
);
21921 /* If the type could not be parsed, an error has already
21922 been produced. For error recovery, behave as if it had
21923 not been specified, which will use the default type
21925 if (cp_type
== error_mark_node
)
21927 cp_type
= NULL_TREE
;
21928 /* We need to skip to the closing parenthesis as
21929 cp_parser_type_id() does not seem to do it for
21931 cp_parser_skip_to_closing_parenthesis (parser
,
21932 /*recovering=*/true,
21933 /*or_comma=*/false,
21934 /*consume_paren=*/false);
21938 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
21939 type_name
= build_tree_list (proto_quals
, cp_type
);
21945 /* Check to see if TYPE refers to an Objective-C selector name. */
21948 cp_parser_objc_selector_p (enum cpp_ttype type
)
21950 return (type
== CPP_NAME
|| type
== CPP_KEYWORD
21951 || type
== CPP_AND_AND
|| type
== CPP_AND_EQ
|| type
== CPP_AND
21952 || type
== CPP_OR
|| type
== CPP_COMPL
|| type
== CPP_NOT
21953 || type
== CPP_NOT_EQ
|| type
== CPP_OR_OR
|| type
== CPP_OR_EQ
21954 || type
== CPP_XOR
|| type
== CPP_XOR_EQ
);
21957 /* Parse an Objective-C selector. */
21960 cp_parser_objc_selector (cp_parser
* parser
)
21962 cp_token
*token
= cp_lexer_consume_token (parser
->lexer
);
21964 if (!cp_parser_objc_selector_p (token
->type
))
21966 error_at (token
->location
, "invalid Objective-C++ selector name");
21967 return error_mark_node
;
21970 /* C++ operator names are allowed to appear in ObjC selectors. */
21971 switch (token
->type
)
21973 case CPP_AND_AND
: return get_identifier ("and");
21974 case CPP_AND_EQ
: return get_identifier ("and_eq");
21975 case CPP_AND
: return get_identifier ("bitand");
21976 case CPP_OR
: return get_identifier ("bitor");
21977 case CPP_COMPL
: return get_identifier ("compl");
21978 case CPP_NOT
: return get_identifier ("not");
21979 case CPP_NOT_EQ
: return get_identifier ("not_eq");
21980 case CPP_OR_OR
: return get_identifier ("or");
21981 case CPP_OR_EQ
: return get_identifier ("or_eq");
21982 case CPP_XOR
: return get_identifier ("xor");
21983 case CPP_XOR_EQ
: return get_identifier ("xor_eq");
21984 default: return token
->u
.value
;
21988 /* Parse an Objective-C params list. */
21991 cp_parser_objc_method_keyword_params (cp_parser
* parser
, tree
* attributes
)
21993 tree params
= NULL_TREE
;
21994 bool maybe_unary_selector_p
= true;
21995 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
21997 while (cp_parser_objc_selector_p (token
->type
) || token
->type
== CPP_COLON
)
21999 tree selector
= NULL_TREE
, type_name
, identifier
;
22000 tree parm_attr
= NULL_TREE
;
22002 if (token
->keyword
== RID_ATTRIBUTE
)
22005 if (token
->type
!= CPP_COLON
)
22006 selector
= cp_parser_objc_selector (parser
);
22008 /* Detect if we have a unary selector. */
22009 if (maybe_unary_selector_p
22010 && cp_lexer_next_token_is_not (parser
->lexer
, CPP_COLON
))
22012 params
= selector
; /* Might be followed by attributes. */
22016 maybe_unary_selector_p
= false;
22017 if (!cp_parser_require (parser
, CPP_COLON
, RT_COLON
))
22019 /* Something went quite wrong. There should be a colon
22020 here, but there is not. Stop parsing parameters. */
22023 type_name
= cp_parser_objc_typename (parser
);
22024 /* New ObjC allows attributes on parameters too. */
22025 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_ATTRIBUTE
))
22026 parm_attr
= cp_parser_attributes_opt (parser
);
22027 identifier
= cp_parser_identifier (parser
);
22031 objc_build_keyword_decl (selector
,
22036 token
= cp_lexer_peek_token (parser
->lexer
);
22039 if (params
== NULL_TREE
)
22041 cp_parser_error (parser
, "objective-c++ method declaration is expected");
22042 return error_mark_node
;
22045 /* We allow tail attributes for the method. */
22046 if (token
->keyword
== RID_ATTRIBUTE
)
22048 *attributes
= cp_parser_attributes_opt (parser
);
22049 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
)
22050 || cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
22052 cp_parser_error (parser
,
22053 "method attributes must be specified at the end");
22054 return error_mark_node
;
22057 if (params
== NULL_TREE
)
22059 cp_parser_error (parser
, "objective-c++ method declaration is expected");
22060 return error_mark_node
;
22065 /* Parse the non-keyword Objective-C params. */
22068 cp_parser_objc_method_tail_params_opt (cp_parser
* parser
, bool *ellipsisp
,
22071 tree params
= make_node (TREE_LIST
);
22072 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
22073 *ellipsisp
= false; /* Initially, assume no ellipsis. */
22075 while (token
->type
== CPP_COMMA
)
22077 cp_parameter_declarator
*parmdecl
;
22080 cp_lexer_consume_token (parser
->lexer
); /* Eat ','. */
22081 token
= cp_lexer_peek_token (parser
->lexer
);
22083 if (token
->type
== CPP_ELLIPSIS
)
22085 cp_lexer_consume_token (parser
->lexer
); /* Eat '...'. */
22087 token
= cp_lexer_peek_token (parser
->lexer
);
22091 /* TODO: parse attributes for tail parameters. */
22092 parmdecl
= cp_parser_parameter_declaration (parser
, false, NULL
);
22093 parm
= grokdeclarator (parmdecl
->declarator
,
22094 &parmdecl
->decl_specifiers
,
22095 PARM
, /*initialized=*/0,
22096 /*attrlist=*/NULL
);
22098 chainon (params
, build_tree_list (NULL_TREE
, parm
));
22099 token
= cp_lexer_peek_token (parser
->lexer
);
22102 /* We allow tail attributes for the method. */
22103 if (token
->keyword
== RID_ATTRIBUTE
)
22105 if (*attributes
== NULL_TREE
)
22107 *attributes
= cp_parser_attributes_opt (parser
);
22108 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
)
22109 || cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
22113 /* We have an error, but parse the attributes, so that we can
22115 *attributes
= cp_parser_attributes_opt (parser
);
22117 cp_parser_error (parser
,
22118 "method attributes must be specified at the end");
22119 return error_mark_node
;
22125 /* Parse a linkage specification, a pragma, an extra semicolon or a block. */
22128 cp_parser_objc_interstitial_code (cp_parser
* parser
)
22130 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
22132 /* If the next token is `extern' and the following token is a string
22133 literal, then we have a linkage specification. */
22134 if (token
->keyword
== RID_EXTERN
22135 && cp_parser_is_string_literal (cp_lexer_peek_nth_token (parser
->lexer
, 2)))
22136 cp_parser_linkage_specification (parser
);
22137 /* Handle #pragma, if any. */
22138 else if (token
->type
== CPP_PRAGMA
)
22139 cp_parser_pragma (parser
, pragma_external
);
22140 /* Allow stray semicolons. */
22141 else if (token
->type
== CPP_SEMICOLON
)
22142 cp_lexer_consume_token (parser
->lexer
);
22143 /* Mark methods as optional or required, when building protocols. */
22144 else if (token
->keyword
== RID_AT_OPTIONAL
)
22146 cp_lexer_consume_token (parser
->lexer
);
22147 objc_set_method_opt (true);
22149 else if (token
->keyword
== RID_AT_REQUIRED
)
22151 cp_lexer_consume_token (parser
->lexer
);
22152 objc_set_method_opt (false);
22154 else if (token
->keyword
== RID_NAMESPACE
)
22155 cp_parser_namespace_definition (parser
);
22156 /* Other stray characters must generate errors. */
22157 else if (token
->type
== CPP_OPEN_BRACE
|| token
->type
== CPP_CLOSE_BRACE
)
22159 cp_lexer_consume_token (parser
->lexer
);
22160 error ("stray %qs between Objective-C++ methods",
22161 token
->type
== CPP_OPEN_BRACE
? "{" : "}");
22163 /* Finally, try to parse a block-declaration, or a function-definition. */
22165 cp_parser_block_declaration (parser
, /*statement_p=*/false);
22168 /* Parse a method signature. */
22171 cp_parser_objc_method_signature (cp_parser
* parser
, tree
* attributes
)
22173 tree rettype
, kwdparms
, optparms
;
22174 bool ellipsis
= false;
22175 bool is_class_method
;
22177 is_class_method
= cp_parser_objc_method_type (parser
);
22178 rettype
= cp_parser_objc_typename (parser
);
22179 *attributes
= NULL_TREE
;
22180 kwdparms
= cp_parser_objc_method_keyword_params (parser
, attributes
);
22181 if (kwdparms
== error_mark_node
)
22182 return error_mark_node
;
22183 optparms
= cp_parser_objc_method_tail_params_opt (parser
, &ellipsis
, attributes
);
22184 if (optparms
== error_mark_node
)
22185 return error_mark_node
;
22187 return objc_build_method_signature (is_class_method
, rettype
, kwdparms
, optparms
, ellipsis
);
22191 cp_parser_objc_method_maybe_bad_prefix_attributes (cp_parser
* parser
)
22194 cp_lexer_save_tokens (parser
->lexer
);
22195 tattr
= cp_parser_attributes_opt (parser
);
22196 gcc_assert (tattr
) ;
22198 /* If the attributes are followed by a method introducer, this is not allowed.
22199 Dump the attributes and flag the situation. */
22200 if (cp_lexer_next_token_is (parser
->lexer
, CPP_PLUS
)
22201 || cp_lexer_next_token_is (parser
->lexer
, CPP_MINUS
))
22204 /* Otherwise, the attributes introduce some interstitial code, possibly so
22205 rewind to allow that check. */
22206 cp_lexer_rollback_tokens (parser
->lexer
);
22210 /* Parse an Objective-C method prototype list. */
22213 cp_parser_objc_method_prototype_list (cp_parser
* parser
)
22215 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
22217 while (token
->keyword
!= RID_AT_END
&& token
->type
!= CPP_EOF
)
22219 if (token
->type
== CPP_PLUS
|| token
->type
== CPP_MINUS
)
22221 tree attributes
, sig
;
22222 bool is_class_method
;
22223 if (token
->type
== CPP_PLUS
)
22224 is_class_method
= true;
22226 is_class_method
= false;
22227 sig
= cp_parser_objc_method_signature (parser
, &attributes
);
22228 if (sig
== error_mark_node
)
22230 cp_parser_skip_to_end_of_block_or_statement (parser
);
22231 token
= cp_lexer_peek_token (parser
->lexer
);
22234 objc_add_method_declaration (is_class_method
, sig
, attributes
);
22235 cp_parser_consume_semicolon_at_end_of_statement (parser
);
22237 else if (token
->keyword
== RID_AT_PROPERTY
)
22238 cp_parser_objc_at_property_declaration (parser
);
22239 else if (token
->keyword
== RID_ATTRIBUTE
22240 && cp_parser_objc_method_maybe_bad_prefix_attributes(parser
))
22241 warning_at (cp_lexer_peek_token (parser
->lexer
)->location
,
22243 "prefix attributes are ignored for methods");
22245 /* Allow for interspersed non-ObjC++ code. */
22246 cp_parser_objc_interstitial_code (parser
);
22248 token
= cp_lexer_peek_token (parser
->lexer
);
22251 if (token
->type
!= CPP_EOF
)
22252 cp_lexer_consume_token (parser
->lexer
); /* Eat '@end'. */
22254 cp_parser_error (parser
, "expected %<@end%>");
22256 objc_finish_interface ();
22259 /* Parse an Objective-C method definition list. */
22262 cp_parser_objc_method_definition_list (cp_parser
* parser
)
22264 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
22266 while (token
->keyword
!= RID_AT_END
&& token
->type
!= CPP_EOF
)
22270 if (token
->type
== CPP_PLUS
|| token
->type
== CPP_MINUS
)
22273 tree sig
, attribute
;
22274 bool is_class_method
;
22275 if (token
->type
== CPP_PLUS
)
22276 is_class_method
= true;
22278 is_class_method
= false;
22279 push_deferring_access_checks (dk_deferred
);
22280 sig
= cp_parser_objc_method_signature (parser
, &attribute
);
22281 if (sig
== error_mark_node
)
22283 cp_parser_skip_to_end_of_block_or_statement (parser
);
22284 token
= cp_lexer_peek_token (parser
->lexer
);
22287 objc_start_method_definition (is_class_method
, sig
, attribute
);
22289 /* For historical reasons, we accept an optional semicolon. */
22290 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
22291 cp_lexer_consume_token (parser
->lexer
);
22293 ptk
= cp_lexer_peek_token (parser
->lexer
);
22294 if (!(ptk
->type
== CPP_PLUS
|| ptk
->type
== CPP_MINUS
22295 || ptk
->type
== CPP_EOF
|| ptk
->keyword
== RID_AT_END
))
22297 perform_deferred_access_checks ();
22298 stop_deferring_access_checks ();
22299 meth
= cp_parser_function_definition_after_declarator (parser
,
22301 pop_deferring_access_checks ();
22302 objc_finish_method_definition (meth
);
22305 /* The following case will be removed once @synthesize is
22306 completely implemented. */
22307 else if (token
->keyword
== RID_AT_PROPERTY
)
22308 cp_parser_objc_at_property_declaration (parser
);
22309 else if (token
->keyword
== RID_AT_SYNTHESIZE
)
22310 cp_parser_objc_at_synthesize_declaration (parser
);
22311 else if (token
->keyword
== RID_AT_DYNAMIC
)
22312 cp_parser_objc_at_dynamic_declaration (parser
);
22313 else if (token
->keyword
== RID_ATTRIBUTE
22314 && cp_parser_objc_method_maybe_bad_prefix_attributes(parser
))
22315 warning_at (token
->location
, OPT_Wattributes
,
22316 "prefix attributes are ignored for methods");
22318 /* Allow for interspersed non-ObjC++ code. */
22319 cp_parser_objc_interstitial_code (parser
);
22321 token
= cp_lexer_peek_token (parser
->lexer
);
22324 if (token
->type
!= CPP_EOF
)
22325 cp_lexer_consume_token (parser
->lexer
); /* Eat '@end'. */
22327 cp_parser_error (parser
, "expected %<@end%>");
22329 objc_finish_implementation ();
22332 /* Parse Objective-C ivars. */
22335 cp_parser_objc_class_ivars (cp_parser
* parser
)
22337 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
22339 if (token
->type
!= CPP_OPEN_BRACE
)
22340 return; /* No ivars specified. */
22342 cp_lexer_consume_token (parser
->lexer
); /* Eat '{'. */
22343 token
= cp_lexer_peek_token (parser
->lexer
);
22345 while (token
->type
!= CPP_CLOSE_BRACE
22346 && token
->keyword
!= RID_AT_END
&& token
->type
!= CPP_EOF
)
22348 cp_decl_specifier_seq declspecs
;
22349 int decl_class_or_enum_p
;
22350 tree prefix_attributes
;
22352 cp_parser_objc_visibility_spec (parser
);
22354 if (cp_lexer_next_token_is (parser
->lexer
, CPP_CLOSE_BRACE
))
22357 cp_parser_decl_specifier_seq (parser
,
22358 CP_PARSER_FLAGS_OPTIONAL
,
22360 &decl_class_or_enum_p
);
22362 /* auto, register, static, extern, mutable. */
22363 if (declspecs
.storage_class
!= sc_none
)
22365 cp_parser_error (parser
, "invalid type for instance variable");
22366 declspecs
.storage_class
= sc_none
;
22370 if (declspecs
.specs
[(int) ds_thread
])
22372 cp_parser_error (parser
, "invalid type for instance variable");
22373 declspecs
.specs
[(int) ds_thread
] = 0;
22377 if (declspecs
.specs
[(int) ds_typedef
])
22379 cp_parser_error (parser
, "invalid type for instance variable");
22380 declspecs
.specs
[(int) ds_typedef
] = 0;
22383 prefix_attributes
= declspecs
.attributes
;
22384 declspecs
.attributes
= NULL_TREE
;
22386 /* Keep going until we hit the `;' at the end of the
22388 while (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
22390 tree width
= NULL_TREE
, attributes
, first_attribute
, decl
;
22391 cp_declarator
*declarator
= NULL
;
22392 int ctor_dtor_or_conv_p
;
22394 /* Check for a (possibly unnamed) bitfield declaration. */
22395 token
= cp_lexer_peek_token (parser
->lexer
);
22396 if (token
->type
== CPP_COLON
)
22399 if (token
->type
== CPP_NAME
22400 && (cp_lexer_peek_nth_token (parser
->lexer
, 2)->type
22403 /* Get the name of the bitfield. */
22404 declarator
= make_id_declarator (NULL_TREE
,
22405 cp_parser_identifier (parser
),
22409 cp_lexer_consume_token (parser
->lexer
); /* Eat ':'. */
22410 /* Get the width of the bitfield. */
22412 = cp_parser_constant_expression (parser
,
22413 /*allow_non_constant=*/false,
22418 /* Parse the declarator. */
22420 = cp_parser_declarator (parser
, CP_PARSER_DECLARATOR_NAMED
,
22421 &ctor_dtor_or_conv_p
,
22422 /*parenthesized_p=*/NULL
,
22423 /*member_p=*/false);
22426 /* Look for attributes that apply to the ivar. */
22427 attributes
= cp_parser_attributes_opt (parser
);
22428 /* Remember which attributes are prefix attributes and
22430 first_attribute
= attributes
;
22431 /* Combine the attributes. */
22432 attributes
= chainon (prefix_attributes
, attributes
);
22435 /* Create the bitfield declaration. */
22436 decl
= grokbitfield (declarator
, &declspecs
,
22440 decl
= grokfield (declarator
, &declspecs
,
22441 NULL_TREE
, /*init_const_expr_p=*/false,
22442 NULL_TREE
, attributes
);
22444 /* Add the instance variable. */
22445 objc_add_instance_variable (decl
);
22447 /* Reset PREFIX_ATTRIBUTES. */
22448 while (attributes
&& TREE_CHAIN (attributes
) != first_attribute
)
22449 attributes
= TREE_CHAIN (attributes
);
22451 TREE_CHAIN (attributes
) = NULL_TREE
;
22453 token
= cp_lexer_peek_token (parser
->lexer
);
22455 if (token
->type
== CPP_COMMA
)
22457 cp_lexer_consume_token (parser
->lexer
); /* Eat ','. */
22463 cp_parser_consume_semicolon_at_end_of_statement (parser
);
22464 token
= cp_lexer_peek_token (parser
->lexer
);
22467 if (token
->keyword
== RID_AT_END
)
22468 cp_parser_error (parser
, "expected %<}%>");
22470 /* Do not consume the RID_AT_END, so it will be read again as terminating
22471 the @interface of @implementation. */
22472 if (token
->keyword
!= RID_AT_END
&& token
->type
!= CPP_EOF
)
22473 cp_lexer_consume_token (parser
->lexer
); /* Eat '}'. */
22475 /* For historical reasons, we accept an optional semicolon. */
22476 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
22477 cp_lexer_consume_token (parser
->lexer
);
22480 /* Parse an Objective-C protocol declaration. */
22483 cp_parser_objc_protocol_declaration (cp_parser
* parser
, tree attributes
)
22485 tree proto
, protorefs
;
22488 cp_lexer_consume_token (parser
->lexer
); /* Eat '@protocol'. */
22489 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_NAME
))
22491 tok
= cp_lexer_peek_token (parser
->lexer
);
22492 error_at (tok
->location
, "identifier expected after %<@protocol%>");
22496 /* See if we have a forward declaration or a definition. */
22497 tok
= cp_lexer_peek_nth_token (parser
->lexer
, 2);
22499 /* Try a forward declaration first. */
22500 if (tok
->type
== CPP_COMMA
|| tok
->type
== CPP_SEMICOLON
)
22502 objc_declare_protocols (cp_parser_objc_identifier_list (parser
),
22505 cp_parser_consume_semicolon_at_end_of_statement (parser
);
22508 /* Ok, we got a full-fledged definition (or at least should). */
22511 proto
= cp_parser_identifier (parser
);
22512 protorefs
= cp_parser_objc_protocol_refs_opt (parser
);
22513 objc_start_protocol (proto
, protorefs
, attributes
);
22514 cp_parser_objc_method_prototype_list (parser
);
22518 /* Parse an Objective-C superclass or category. */
22521 cp_parser_objc_superclass_or_category (cp_parser
*parser
,
22524 tree
*categ
, bool *is_class_extension
)
22526 cp_token
*next
= cp_lexer_peek_token (parser
->lexer
);
22528 *super
= *categ
= NULL_TREE
;
22529 *is_class_extension
= false;
22530 if (next
->type
== CPP_COLON
)
22532 cp_lexer_consume_token (parser
->lexer
); /* Eat ':'. */
22533 *super
= cp_parser_identifier (parser
);
22535 else if (next
->type
== CPP_OPEN_PAREN
)
22537 cp_lexer_consume_token (parser
->lexer
); /* Eat '('. */
22539 /* If there is no category name, and this is an @interface, we
22540 have a class extension. */
22541 if (iface_p
&& cp_lexer_next_token_is (parser
->lexer
, CPP_CLOSE_PAREN
))
22543 *categ
= NULL_TREE
;
22544 *is_class_extension
= true;
22547 *categ
= cp_parser_identifier (parser
);
22549 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
22553 /* Parse an Objective-C class interface. */
22556 cp_parser_objc_class_interface (cp_parser
* parser
, tree attributes
)
22558 tree name
, super
, categ
, protos
;
22559 bool is_class_extension
;
22561 cp_lexer_consume_token (parser
->lexer
); /* Eat '@interface'. */
22562 name
= cp_parser_identifier (parser
);
22563 if (name
== error_mark_node
)
22565 /* It's hard to recover because even if valid @interface stuff
22566 is to follow, we can't compile it (or validate it) if we
22567 don't even know which class it refers to. Let's assume this
22568 was a stray '@interface' token in the stream and skip it.
22572 cp_parser_objc_superclass_or_category (parser
, true, &super
, &categ
,
22573 &is_class_extension
);
22574 protos
= cp_parser_objc_protocol_refs_opt (parser
);
22576 /* We have either a class or a category on our hands. */
22577 if (categ
|| is_class_extension
)
22578 objc_start_category_interface (name
, categ
, protos
, attributes
);
22581 objc_start_class_interface (name
, super
, protos
, attributes
);
22582 /* Handle instance variable declarations, if any. */
22583 cp_parser_objc_class_ivars (parser
);
22584 objc_continue_interface ();
22587 cp_parser_objc_method_prototype_list (parser
);
22590 /* Parse an Objective-C class implementation. */
22593 cp_parser_objc_class_implementation (cp_parser
* parser
)
22595 tree name
, super
, categ
;
22596 bool is_class_extension
;
22598 cp_lexer_consume_token (parser
->lexer
); /* Eat '@implementation'. */
22599 name
= cp_parser_identifier (parser
);
22600 if (name
== error_mark_node
)
22602 /* It's hard to recover because even if valid @implementation
22603 stuff is to follow, we can't compile it (or validate it) if
22604 we don't even know which class it refers to. Let's assume
22605 this was a stray '@implementation' token in the stream and
22610 cp_parser_objc_superclass_or_category (parser
, false, &super
, &categ
,
22611 &is_class_extension
);
22613 /* We have either a class or a category on our hands. */
22615 objc_start_category_implementation (name
, categ
);
22618 objc_start_class_implementation (name
, super
);
22619 /* Handle instance variable declarations, if any. */
22620 cp_parser_objc_class_ivars (parser
);
22621 objc_continue_implementation ();
22624 cp_parser_objc_method_definition_list (parser
);
22627 /* Consume the @end token and finish off the implementation. */
22630 cp_parser_objc_end_implementation (cp_parser
* parser
)
22632 cp_lexer_consume_token (parser
->lexer
); /* Eat '@end'. */
22633 objc_finish_implementation ();
22636 /* Parse an Objective-C declaration. */
22639 cp_parser_objc_declaration (cp_parser
* parser
, tree attributes
)
22641 /* Try to figure out what kind of declaration is present. */
22642 cp_token
*kwd
= cp_lexer_peek_token (parser
->lexer
);
22645 switch (kwd
->keyword
)
22650 error_at (kwd
->location
, "attributes may not be specified before"
22651 " the %<@%D%> Objective-C++ keyword",
22655 case RID_AT_IMPLEMENTATION
:
22656 warning_at (kwd
->location
, OPT_Wattributes
,
22657 "prefix attributes are ignored before %<@%D%>",
22664 switch (kwd
->keyword
)
22667 cp_parser_objc_alias_declaration (parser
);
22670 cp_parser_objc_class_declaration (parser
);
22672 case RID_AT_PROTOCOL
:
22673 cp_parser_objc_protocol_declaration (parser
, attributes
);
22675 case RID_AT_INTERFACE
:
22676 cp_parser_objc_class_interface (parser
, attributes
);
22678 case RID_AT_IMPLEMENTATION
:
22679 cp_parser_objc_class_implementation (parser
);
22682 cp_parser_objc_end_implementation (parser
);
22685 error_at (kwd
->location
, "misplaced %<@%D%> Objective-C++ construct",
22687 cp_parser_skip_to_end_of_block_or_statement (parser
);
22691 /* Parse an Objective-C try-catch-finally statement.
22693 objc-try-catch-finally-stmt:
22694 @try compound-statement objc-catch-clause-seq [opt]
22695 objc-finally-clause [opt]
22697 objc-catch-clause-seq:
22698 objc-catch-clause objc-catch-clause-seq [opt]
22701 @catch ( objc-exception-declaration ) compound-statement
22703 objc-finally-clause:
22704 @finally compound-statement
22706 objc-exception-declaration:
22707 parameter-declaration
22710 where '...' is to be interpreted literally, that is, it means CPP_ELLIPSIS.
22714 PS: This function is identical to c_parser_objc_try_catch_finally_statement
22715 for C. Keep them in sync. */
22718 cp_parser_objc_try_catch_finally_statement (cp_parser
*parser
)
22720 location_t location
;
22723 cp_parser_require_keyword (parser
, RID_AT_TRY
, RT_AT_TRY
);
22724 location
= cp_lexer_peek_token (parser
->lexer
)->location
;
22725 objc_maybe_warn_exceptions (location
);
22726 /* NB: The @try block needs to be wrapped in its own STATEMENT_LIST
22727 node, lest it get absorbed into the surrounding block. */
22728 stmt
= push_stmt_list ();
22729 cp_parser_compound_statement (parser
, NULL
, false);
22730 objc_begin_try_stmt (location
, pop_stmt_list (stmt
));
22732 while (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_AT_CATCH
))
22734 cp_parameter_declarator
*parm
;
22735 tree parameter_declaration
= error_mark_node
;
22736 bool seen_open_paren
= false;
22738 cp_lexer_consume_token (parser
->lexer
);
22739 if (cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
22740 seen_open_paren
= true;
22741 if (cp_lexer_next_token_is (parser
->lexer
, CPP_ELLIPSIS
))
22743 /* We have "@catch (...)" (where the '...' are literally
22744 what is in the code). Skip the '...'.
22745 parameter_declaration is set to NULL_TREE, and
22746 objc_being_catch_clauses() knows that that means
22748 cp_lexer_consume_token (parser
->lexer
);
22749 parameter_declaration
= NULL_TREE
;
22753 /* We have "@catch (NSException *exception)" or something
22754 like that. Parse the parameter declaration. */
22755 parm
= cp_parser_parameter_declaration (parser
, false, NULL
);
22757 parameter_declaration
= error_mark_node
;
22759 parameter_declaration
= grokdeclarator (parm
->declarator
,
22760 &parm
->decl_specifiers
,
22761 PARM
, /*initialized=*/0,
22762 /*attrlist=*/NULL
);
22764 if (seen_open_paren
)
22765 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
22768 /* If there was no open parenthesis, we are recovering from
22769 an error, and we are trying to figure out what mistake
22770 the user has made. */
22772 /* If there is an immediate closing parenthesis, the user
22773 probably forgot the opening one (ie, they typed "@catch
22774 NSException *e)". Parse the closing parenthesis and keep
22776 if (cp_lexer_next_token_is (parser
->lexer
, CPP_CLOSE_PAREN
))
22777 cp_lexer_consume_token (parser
->lexer
);
22779 /* If these is no immediate closing parenthesis, the user
22780 probably doesn't know that parenthesis are required at
22781 all (ie, they typed "@catch NSException *e"). So, just
22782 forget about the closing parenthesis and keep going. */
22784 objc_begin_catch_clause (parameter_declaration
);
22785 cp_parser_compound_statement (parser
, NULL
, false);
22786 objc_finish_catch_clause ();
22788 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_AT_FINALLY
))
22790 cp_lexer_consume_token (parser
->lexer
);
22791 location
= cp_lexer_peek_token (parser
->lexer
)->location
;
22792 /* NB: The @finally block needs to be wrapped in its own STATEMENT_LIST
22793 node, lest it get absorbed into the surrounding block. */
22794 stmt
= push_stmt_list ();
22795 cp_parser_compound_statement (parser
, NULL
, false);
22796 objc_build_finally_clause (location
, pop_stmt_list (stmt
));
22799 return objc_finish_try_stmt ();
22802 /* Parse an Objective-C synchronized statement.
22804 objc-synchronized-stmt:
22805 @synchronized ( expression ) compound-statement
22807 Returns NULL_TREE. */
22810 cp_parser_objc_synchronized_statement (cp_parser
*parser
)
22812 location_t location
;
22815 cp_parser_require_keyword (parser
, RID_AT_SYNCHRONIZED
, RT_AT_SYNCHRONIZED
);
22817 location
= cp_lexer_peek_token (parser
->lexer
)->location
;
22818 objc_maybe_warn_exceptions (location
);
22819 cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
);
22820 lock
= cp_parser_expression (parser
, false, NULL
);
22821 cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
);
22823 /* NB: The @synchronized block needs to be wrapped in its own STATEMENT_LIST
22824 node, lest it get absorbed into the surrounding block. */
22825 stmt
= push_stmt_list ();
22826 cp_parser_compound_statement (parser
, NULL
, false);
22828 return objc_build_synchronized (location
, lock
, pop_stmt_list (stmt
));
22831 /* Parse an Objective-C throw statement.
22834 @throw assignment-expression [opt] ;
22836 Returns a constructed '@throw' statement. */
22839 cp_parser_objc_throw_statement (cp_parser
*parser
)
22841 tree expr
= NULL_TREE
;
22842 location_t loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
22844 cp_parser_require_keyword (parser
, RID_AT_THROW
, RT_AT_THROW
);
22846 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
22847 expr
= cp_parser_expression (parser
, /*cast_p=*/false, NULL
);
22849 cp_parser_consume_semicolon_at_end_of_statement (parser
);
22851 return objc_build_throw_stmt (loc
, expr
);
22854 /* Parse an Objective-C statement. */
22857 cp_parser_objc_statement (cp_parser
* parser
)
22859 /* Try to figure out what kind of declaration is present. */
22860 cp_token
*kwd
= cp_lexer_peek_token (parser
->lexer
);
22862 switch (kwd
->keyword
)
22865 return cp_parser_objc_try_catch_finally_statement (parser
);
22866 case RID_AT_SYNCHRONIZED
:
22867 return cp_parser_objc_synchronized_statement (parser
);
22869 return cp_parser_objc_throw_statement (parser
);
22871 error_at (kwd
->location
, "misplaced %<@%D%> Objective-C++ construct",
22873 cp_parser_skip_to_end_of_block_or_statement (parser
);
22876 return error_mark_node
;
22879 /* If we are compiling ObjC++ and we see an __attribute__ we neeed to
22880 look ahead to see if an objc keyword follows the attributes. This
22881 is to detect the use of prefix attributes on ObjC @interface and
22885 cp_parser_objc_valid_prefix_attributes (cp_parser
* parser
, tree
*attrib
)
22887 cp_lexer_save_tokens (parser
->lexer
);
22888 *attrib
= cp_parser_attributes_opt (parser
);
22889 gcc_assert (*attrib
);
22890 if (OBJC_IS_AT_KEYWORD (cp_lexer_peek_token (parser
->lexer
)->keyword
))
22892 cp_lexer_commit_tokens (parser
->lexer
);
22895 cp_lexer_rollback_tokens (parser
->lexer
);
22899 /* This routine is a minimal replacement for
22900 c_parser_struct_declaration () used when parsing the list of
22901 types/names or ObjC++ properties. For example, when parsing the
22904 @property (readonly) int a, b, c;
22906 this function is responsible for parsing "int a, int b, int c" and
22907 returning the declarations as CHAIN of DECLs.
22909 TODO: Share this code with cp_parser_objc_class_ivars. It's very
22910 similar parsing. */
22912 cp_parser_objc_struct_declaration (cp_parser
*parser
)
22914 tree decls
= NULL_TREE
;
22915 cp_decl_specifier_seq declspecs
;
22916 int decl_class_or_enum_p
;
22917 tree prefix_attributes
;
22919 cp_parser_decl_specifier_seq (parser
,
22920 CP_PARSER_FLAGS_NONE
,
22922 &decl_class_or_enum_p
);
22924 if (declspecs
.type
== error_mark_node
)
22925 return error_mark_node
;
22927 /* auto, register, static, extern, mutable. */
22928 if (declspecs
.storage_class
!= sc_none
)
22930 cp_parser_error (parser
, "invalid type for property");
22931 declspecs
.storage_class
= sc_none
;
22935 if (declspecs
.specs
[(int) ds_thread
])
22937 cp_parser_error (parser
, "invalid type for property");
22938 declspecs
.specs
[(int) ds_thread
] = 0;
22942 if (declspecs
.specs
[(int) ds_typedef
])
22944 cp_parser_error (parser
, "invalid type for property");
22945 declspecs
.specs
[(int) ds_typedef
] = 0;
22948 prefix_attributes
= declspecs
.attributes
;
22949 declspecs
.attributes
= NULL_TREE
;
22951 /* Keep going until we hit the `;' at the end of the declaration. */
22952 while (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
22954 tree attributes
, first_attribute
, decl
;
22955 cp_declarator
*declarator
;
22958 /* Parse the declarator. */
22959 declarator
= cp_parser_declarator (parser
, CP_PARSER_DECLARATOR_NAMED
,
22960 NULL
, NULL
, false);
22962 /* Look for attributes that apply to the ivar. */
22963 attributes
= cp_parser_attributes_opt (parser
);
22964 /* Remember which attributes are prefix attributes and
22966 first_attribute
= attributes
;
22967 /* Combine the attributes. */
22968 attributes
= chainon (prefix_attributes
, attributes
);
22970 decl
= grokfield (declarator
, &declspecs
,
22971 NULL_TREE
, /*init_const_expr_p=*/false,
22972 NULL_TREE
, attributes
);
22974 if (decl
== error_mark_node
|| decl
== NULL_TREE
)
22975 return error_mark_node
;
22977 /* Reset PREFIX_ATTRIBUTES. */
22978 while (attributes
&& TREE_CHAIN (attributes
) != first_attribute
)
22979 attributes
= TREE_CHAIN (attributes
);
22981 TREE_CHAIN (attributes
) = NULL_TREE
;
22983 DECL_CHAIN (decl
) = decls
;
22986 token
= cp_lexer_peek_token (parser
->lexer
);
22987 if (token
->type
== CPP_COMMA
)
22989 cp_lexer_consume_token (parser
->lexer
); /* Eat ','. */
22998 /* Parse an Objective-C @property declaration. The syntax is:
23000 objc-property-declaration:
23001 '@property' objc-property-attributes[opt] struct-declaration ;
23003 objc-property-attributes:
23004 '(' objc-property-attribute-list ')'
23006 objc-property-attribute-list:
23007 objc-property-attribute
23008 objc-property-attribute-list, objc-property-attribute
23010 objc-property-attribute
23011 'getter' = identifier
23012 'setter' = identifier
23021 @property NSString *name;
23022 @property (readonly) id object;
23023 @property (retain, nonatomic, getter=getTheName) id name;
23024 @property int a, b, c;
23026 PS: This function is identical to
23027 c_parser_objc_at_property_declaration for C. Keep them in sync. */
23029 cp_parser_objc_at_property_declaration (cp_parser
*parser
)
23031 /* The following variables hold the attributes of the properties as
23032 parsed. They are 'false' or 'NULL_TREE' if the attribute was not
23033 seen. When we see an attribute, we set them to 'true' (if they
23034 are boolean properties) or to the identifier (if they have an
23035 argument, ie, for getter and setter). Note that here we only
23036 parse the list of attributes, check the syntax and accumulate the
23037 attributes that we find. objc_add_property_declaration() will
23038 then process the information. */
23039 bool property_assign
= false;
23040 bool property_copy
= false;
23041 tree property_getter_ident
= NULL_TREE
;
23042 bool property_nonatomic
= false;
23043 bool property_readonly
= false;
23044 bool property_readwrite
= false;
23045 bool property_retain
= false;
23046 tree property_setter_ident
= NULL_TREE
;
23048 /* 'properties' is the list of properties that we read. Usually a
23049 single one, but maybe more (eg, in "@property int a, b, c;" there
23054 loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
23056 cp_lexer_consume_token (parser
->lexer
); /* Eat '@property'. */
23058 /* Parse the optional attribute list... */
23059 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_PAREN
))
23062 cp_lexer_consume_token (parser
->lexer
);
23066 bool syntax_error
= false;
23067 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
23070 if (token
->type
!= CPP_NAME
)
23072 cp_parser_error (parser
, "expected identifier");
23075 keyword
= C_RID_CODE (token
->u
.value
);
23076 cp_lexer_consume_token (parser
->lexer
);
23079 case RID_ASSIGN
: property_assign
= true; break;
23080 case RID_COPY
: property_copy
= true; break;
23081 case RID_NONATOMIC
: property_nonatomic
= true; break;
23082 case RID_READONLY
: property_readonly
= true; break;
23083 case RID_READWRITE
: property_readwrite
= true; break;
23084 case RID_RETAIN
: property_retain
= true; break;
23088 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_EQ
))
23090 if (keyword
== RID_GETTER
)
23091 cp_parser_error (parser
,
23092 "missing %<=%> (after %<getter%> attribute)");
23094 cp_parser_error (parser
,
23095 "missing %<=%> (after %<setter%> attribute)");
23096 syntax_error
= true;
23099 cp_lexer_consume_token (parser
->lexer
); /* eat the = */
23100 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_NAME
))
23102 cp_parser_error (parser
, "expected identifier");
23103 syntax_error
= true;
23106 if (keyword
== RID_SETTER
)
23108 if (property_setter_ident
!= NULL_TREE
)
23109 cp_parser_error (parser
, "the %<setter%> attribute may only be specified once");
23111 property_setter_ident
= cp_lexer_peek_token (parser
->lexer
)->u
.value
;
23112 cp_lexer_consume_token (parser
->lexer
);
23113 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COLON
))
23114 cp_parser_error (parser
, "setter name must terminate with %<:%>");
23116 cp_lexer_consume_token (parser
->lexer
);
23120 if (property_getter_ident
!= NULL_TREE
)
23121 cp_parser_error (parser
, "the %<getter%> attribute may only be specified once");
23123 property_getter_ident
= cp_lexer_peek_token (parser
->lexer
)->u
.value
;
23124 cp_lexer_consume_token (parser
->lexer
);
23128 cp_parser_error (parser
, "unknown property attribute");
23129 syntax_error
= true;
23136 if (cp_lexer_next_token_is (parser
->lexer
, CPP_COMMA
))
23137 cp_lexer_consume_token (parser
->lexer
);
23142 /* FIXME: "@property (setter, assign);" will generate a spurious
23143 "error: expected ‘)’ before ‘,’ token". This is because
23144 cp_parser_require, unlike the C counterpart, will produce an
23145 error even if we are in error recovery. */
23146 if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
23148 cp_parser_skip_to_closing_parenthesis (parser
,
23149 /*recovering=*/true,
23150 /*or_comma=*/false,
23151 /*consume_paren=*/true);
23155 /* ... and the property declaration(s). */
23156 properties
= cp_parser_objc_struct_declaration (parser
);
23158 if (properties
== error_mark_node
)
23160 cp_parser_skip_to_end_of_statement (parser
);
23161 /* If the next token is now a `;', consume it. */
23162 if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
23163 cp_lexer_consume_token (parser
->lexer
);
23167 if (properties
== NULL_TREE
)
23168 cp_parser_error (parser
, "expected identifier");
23171 /* Comma-separated properties are chained together in
23172 reverse order; add them one by one. */
23173 properties
= nreverse (properties
);
23175 for (; properties
; properties
= TREE_CHAIN (properties
))
23176 objc_add_property_declaration (loc
, copy_node (properties
),
23177 property_readonly
, property_readwrite
,
23178 property_assign
, property_retain
,
23179 property_copy
, property_nonatomic
,
23180 property_getter_ident
, property_setter_ident
);
23183 cp_parser_consume_semicolon_at_end_of_statement (parser
);
23186 /* Parse an Objective-C++ @synthesize declaration. The syntax is:
23188 objc-synthesize-declaration:
23189 @synthesize objc-synthesize-identifier-list ;
23191 objc-synthesize-identifier-list:
23192 objc-synthesize-identifier
23193 objc-synthesize-identifier-list, objc-synthesize-identifier
23195 objc-synthesize-identifier
23197 identifier = identifier
23200 @synthesize MyProperty;
23201 @synthesize OneProperty, AnotherProperty=MyIvar, YetAnotherProperty;
23203 PS: This function is identical to c_parser_objc_at_synthesize_declaration
23204 for C. Keep them in sync.
23207 cp_parser_objc_at_synthesize_declaration (cp_parser
*parser
)
23209 tree list
= NULL_TREE
;
23211 loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
23213 cp_lexer_consume_token (parser
->lexer
); /* Eat '@synthesize'. */
23216 tree property
, ivar
;
23217 property
= cp_parser_identifier (parser
);
23218 if (property
== error_mark_node
)
23220 cp_parser_consume_semicolon_at_end_of_statement (parser
);
23223 if (cp_lexer_next_token_is (parser
->lexer
, CPP_EQ
))
23225 cp_lexer_consume_token (parser
->lexer
);
23226 ivar
= cp_parser_identifier (parser
);
23227 if (ivar
== error_mark_node
)
23229 cp_parser_consume_semicolon_at_end_of_statement (parser
);
23235 list
= chainon (list
, build_tree_list (ivar
, property
));
23236 if (cp_lexer_next_token_is (parser
->lexer
, CPP_COMMA
))
23237 cp_lexer_consume_token (parser
->lexer
);
23241 cp_parser_consume_semicolon_at_end_of_statement (parser
);
23242 objc_add_synthesize_declaration (loc
, list
);
23245 /* Parse an Objective-C++ @dynamic declaration. The syntax is:
23247 objc-dynamic-declaration:
23248 @dynamic identifier-list ;
23251 @dynamic MyProperty;
23252 @dynamic MyProperty, AnotherProperty;
23254 PS: This function is identical to c_parser_objc_at_dynamic_declaration
23255 for C. Keep them in sync.
23258 cp_parser_objc_at_dynamic_declaration (cp_parser
*parser
)
23260 tree list
= NULL_TREE
;
23262 loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
23264 cp_lexer_consume_token (parser
->lexer
); /* Eat '@dynamic'. */
23268 property
= cp_parser_identifier (parser
);
23269 if (property
== error_mark_node
)
23271 cp_parser_consume_semicolon_at_end_of_statement (parser
);
23274 list
= chainon (list
, build_tree_list (NULL
, property
));
23275 if (cp_lexer_next_token_is (parser
->lexer
, CPP_COMMA
))
23276 cp_lexer_consume_token (parser
->lexer
);
23280 cp_parser_consume_semicolon_at_end_of_statement (parser
);
23281 objc_add_dynamic_declaration (loc
, list
);
23285 /* OpenMP 2.5 parsing routines. */
23287 /* Returns name of the next clause.
23288 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
23289 the token is not consumed. Otherwise appropriate pragma_omp_clause is
23290 returned and the token is consumed. */
23292 static pragma_omp_clause
23293 cp_parser_omp_clause_name (cp_parser
*parser
)
23295 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
23297 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_IF
))
23298 result
= PRAGMA_OMP_CLAUSE_IF
;
23299 else if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_DEFAULT
))
23300 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
23301 else if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_PRIVATE
))
23302 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
23303 else if (cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
))
23305 tree id
= cp_lexer_peek_token (parser
->lexer
)->u
.value
;
23306 const char *p
= IDENTIFIER_POINTER (id
);
23311 if (!strcmp ("collapse", p
))
23312 result
= PRAGMA_OMP_CLAUSE_COLLAPSE
;
23313 else if (!strcmp ("copyin", p
))
23314 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
23315 else if (!strcmp ("copyprivate", p
))
23316 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
23319 if (!strcmp ("firstprivate", p
))
23320 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
23323 if (!strcmp ("lastprivate", p
))
23324 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
23327 if (!strcmp ("nowait", p
))
23328 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
23329 else if (!strcmp ("num_threads", p
))
23330 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
23333 if (!strcmp ("ordered", p
))
23334 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
23337 if (!strcmp ("reduction", p
))
23338 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
23341 if (!strcmp ("schedule", p
))
23342 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
23343 else if (!strcmp ("shared", p
))
23344 result
= PRAGMA_OMP_CLAUSE_SHARED
;
23347 if (!strcmp ("untied", p
))
23348 result
= PRAGMA_OMP_CLAUSE_UNTIED
;
23353 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
23354 cp_lexer_consume_token (parser
->lexer
);
23359 /* Validate that a clause of the given type does not already exist. */
23362 check_no_duplicate_clause (tree clauses
, enum omp_clause_code code
,
23363 const char *name
, location_t location
)
23367 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
23368 if (OMP_CLAUSE_CODE (c
) == code
)
23370 error_at (location
, "too many %qs clauses", name
);
23378 variable-list , identifier
23380 In addition, we match a closing parenthesis. An opening parenthesis
23381 will have been consumed by the caller.
23383 If KIND is nonzero, create the appropriate node and install the decl
23384 in OMP_CLAUSE_DECL and add the node to the head of the list.
23386 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
23387 return the list created. */
23390 cp_parser_omp_var_list_no_open (cp_parser
*parser
, enum omp_clause_code kind
,
23398 token
= cp_lexer_peek_token (parser
->lexer
);
23399 name
= cp_parser_id_expression (parser
, /*template_p=*/false,
23400 /*check_dependency_p=*/true,
23401 /*template_p=*/NULL
,
23402 /*declarator_p=*/false,
23403 /*optional_p=*/false);
23404 if (name
== error_mark_node
)
23407 decl
= cp_parser_lookup_name_simple (parser
, name
, token
->location
);
23408 if (decl
== error_mark_node
)
23409 cp_parser_name_lookup_error (parser
, name
, decl
, NLE_NULL
,
23411 else if (kind
!= 0)
23413 tree u
= build_omp_clause (token
->location
, kind
);
23414 OMP_CLAUSE_DECL (u
) = decl
;
23415 OMP_CLAUSE_CHAIN (u
) = list
;
23419 list
= tree_cons (decl
, NULL_TREE
, list
);
23422 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_COMMA
))
23424 cp_lexer_consume_token (parser
->lexer
);
23427 if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
23431 /* Try to resync to an unnested comma. Copied from
23432 cp_parser_parenthesized_expression_list. */
23434 ending
= cp_parser_skip_to_closing_parenthesis (parser
,
23435 /*recovering=*/true,
23437 /*consume_paren=*/true);
23445 /* Similarly, but expect leading and trailing parenthesis. This is a very
23446 common case for omp clauses. */
23449 cp_parser_omp_var_list (cp_parser
*parser
, enum omp_clause_code kind
, tree list
)
23451 if (cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
23452 return cp_parser_omp_var_list_no_open (parser
, kind
, list
);
23457 collapse ( constant-expression ) */
23460 cp_parser_omp_clause_collapse (cp_parser
*parser
, tree list
, location_t location
)
23466 loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
23467 if (!cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
23470 num
= cp_parser_constant_expression (parser
, false, NULL
);
23472 if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
23473 cp_parser_skip_to_closing_parenthesis (parser
, /*recovering=*/true,
23474 /*or_comma=*/false,
23475 /*consume_paren=*/true);
23477 if (num
== error_mark_node
)
23479 num
= fold_non_dependent_expr (num
);
23480 if (!INTEGRAL_TYPE_P (TREE_TYPE (num
))
23481 || !host_integerp (num
, 0)
23482 || (n
= tree_low_cst (num
, 0)) <= 0
23485 error_at (loc
, "collapse argument needs positive constant integer expression");
23489 check_no_duplicate_clause (list
, OMP_CLAUSE_COLLAPSE
, "collapse", location
);
23490 c
= build_omp_clause (loc
, OMP_CLAUSE_COLLAPSE
);
23491 OMP_CLAUSE_CHAIN (c
) = list
;
23492 OMP_CLAUSE_COLLAPSE_EXPR (c
) = num
;
23498 default ( shared | none ) */
23501 cp_parser_omp_clause_default (cp_parser
*parser
, tree list
, location_t location
)
23503 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
23506 if (!cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
23508 if (cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
))
23510 tree id
= cp_lexer_peek_token (parser
->lexer
)->u
.value
;
23511 const char *p
= IDENTIFIER_POINTER (id
);
23516 if (strcmp ("none", p
) != 0)
23518 kind
= OMP_CLAUSE_DEFAULT_NONE
;
23522 if (strcmp ("shared", p
) != 0)
23524 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
23531 cp_lexer_consume_token (parser
->lexer
);
23536 cp_parser_error (parser
, "expected %<none%> or %<shared%>");
23539 if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
23540 cp_parser_skip_to_closing_parenthesis (parser
, /*recovering=*/true,
23541 /*or_comma=*/false,
23542 /*consume_paren=*/true);
23544 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
23547 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default", location
);
23548 c
= build_omp_clause (location
, OMP_CLAUSE_DEFAULT
);
23549 OMP_CLAUSE_CHAIN (c
) = list
;
23550 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
23556 if ( expression ) */
23559 cp_parser_omp_clause_if (cp_parser
*parser
, tree list
, location_t location
)
23563 if (!cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
23566 t
= cp_parser_condition (parser
);
23568 if (t
== error_mark_node
23569 || !cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
23570 cp_parser_skip_to_closing_parenthesis (parser
, /*recovering=*/true,
23571 /*or_comma=*/false,
23572 /*consume_paren=*/true);
23574 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if", location
);
23576 c
= build_omp_clause (location
, OMP_CLAUSE_IF
);
23577 OMP_CLAUSE_IF_EXPR (c
) = t
;
23578 OMP_CLAUSE_CHAIN (c
) = list
;
23587 cp_parser_omp_clause_nowait (cp_parser
*parser ATTRIBUTE_UNUSED
,
23588 tree list
, location_t location
)
23592 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait", location
);
23594 c
= build_omp_clause (location
, OMP_CLAUSE_NOWAIT
);
23595 OMP_CLAUSE_CHAIN (c
) = list
;
23600 num_threads ( expression ) */
23603 cp_parser_omp_clause_num_threads (cp_parser
*parser
, tree list
,
23604 location_t location
)
23608 if (!cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
23611 t
= cp_parser_expression (parser
, false, NULL
);
23613 if (t
== error_mark_node
23614 || !cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
23615 cp_parser_skip_to_closing_parenthesis (parser
, /*recovering=*/true,
23616 /*or_comma=*/false,
23617 /*consume_paren=*/true);
23619 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
,
23620 "num_threads", location
);
23622 c
= build_omp_clause (location
, OMP_CLAUSE_NUM_THREADS
);
23623 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
23624 OMP_CLAUSE_CHAIN (c
) = list
;
23633 cp_parser_omp_clause_ordered (cp_parser
*parser ATTRIBUTE_UNUSED
,
23634 tree list
, location_t location
)
23638 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
,
23639 "ordered", location
);
23641 c
= build_omp_clause (location
, OMP_CLAUSE_ORDERED
);
23642 OMP_CLAUSE_CHAIN (c
) = list
;
23647 reduction ( reduction-operator : variable-list )
23649 reduction-operator:
23650 One of: + * - & ^ | && || */
23653 cp_parser_omp_clause_reduction (cp_parser
*parser
, tree list
)
23655 enum tree_code code
;
23658 if (!cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
23661 switch (cp_lexer_peek_token (parser
->lexer
)->type
)
23673 code
= BIT_AND_EXPR
;
23676 code
= BIT_XOR_EXPR
;
23679 code
= BIT_IOR_EXPR
;
23682 code
= TRUTH_ANDIF_EXPR
;
23685 code
= TRUTH_ORIF_EXPR
;
23688 cp_parser_error (parser
, "expected %<+%>, %<*%>, %<-%>, %<&%>, %<^%>, "
23689 "%<|%>, %<&&%>, or %<||%>");
23691 cp_parser_skip_to_closing_parenthesis (parser
, /*recovering=*/true,
23692 /*or_comma=*/false,
23693 /*consume_paren=*/true);
23696 cp_lexer_consume_token (parser
->lexer
);
23698 if (!cp_parser_require (parser
, CPP_COLON
, RT_COLON
))
23701 nlist
= cp_parser_omp_var_list_no_open (parser
, OMP_CLAUSE_REDUCTION
, list
);
23702 for (c
= nlist
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
23703 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
23709 schedule ( schedule-kind )
23710 schedule ( schedule-kind , expression )
23713 static | dynamic | guided | runtime | auto */
23716 cp_parser_omp_clause_schedule (cp_parser
*parser
, tree list
, location_t location
)
23720 if (!cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
23723 c
= build_omp_clause (location
, OMP_CLAUSE_SCHEDULE
);
23725 if (cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
))
23727 tree id
= cp_lexer_peek_token (parser
->lexer
)->u
.value
;
23728 const char *p
= IDENTIFIER_POINTER (id
);
23733 if (strcmp ("dynamic", p
) != 0)
23735 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
23739 if (strcmp ("guided", p
) != 0)
23741 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
23745 if (strcmp ("runtime", p
) != 0)
23747 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
23754 else if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_STATIC
))
23755 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
23756 else if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_AUTO
))
23757 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_AUTO
;
23760 cp_lexer_consume_token (parser
->lexer
);
23762 if (cp_lexer_next_token_is (parser
->lexer
, CPP_COMMA
))
23765 cp_lexer_consume_token (parser
->lexer
);
23767 token
= cp_lexer_peek_token (parser
->lexer
);
23768 t
= cp_parser_assignment_expression (parser
, false, NULL
);
23770 if (t
== error_mark_node
)
23772 else if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
23773 error_at (token
->location
, "schedule %<runtime%> does not take "
23774 "a %<chunk_size%> parameter");
23775 else if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_AUTO
)
23776 error_at (token
->location
, "schedule %<auto%> does not take "
23777 "a %<chunk_size%> parameter");
23779 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
23781 if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
23784 else if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_COMMA_CLOSE_PAREN
))
23787 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule", location
);
23788 OMP_CLAUSE_CHAIN (c
) = list
;
23792 cp_parser_error (parser
, "invalid schedule kind");
23794 cp_parser_skip_to_closing_parenthesis (parser
, /*recovering=*/true,
23795 /*or_comma=*/false,
23796 /*consume_paren=*/true);
23804 cp_parser_omp_clause_untied (cp_parser
*parser ATTRIBUTE_UNUSED
,
23805 tree list
, location_t location
)
23809 check_no_duplicate_clause (list
, OMP_CLAUSE_UNTIED
, "untied", location
);
23811 c
= build_omp_clause (location
, OMP_CLAUSE_UNTIED
);
23812 OMP_CLAUSE_CHAIN (c
) = list
;
23816 /* Parse all OpenMP clauses. The set clauses allowed by the directive
23817 is a bitmask in MASK. Return the list of clauses found; the result
23818 of clause default goes in *pdefault. */
23821 cp_parser_omp_all_clauses (cp_parser
*parser
, unsigned int mask
,
23822 const char *where
, cp_token
*pragma_tok
)
23824 tree clauses
= NULL
;
23826 cp_token
*token
= NULL
;
23828 while (cp_lexer_next_token_is_not (parser
->lexer
, CPP_PRAGMA_EOL
))
23830 pragma_omp_clause c_kind
;
23831 const char *c_name
;
23832 tree prev
= clauses
;
23834 if (!first
&& cp_lexer_next_token_is (parser
->lexer
, CPP_COMMA
))
23835 cp_lexer_consume_token (parser
->lexer
);
23837 token
= cp_lexer_peek_token (parser
->lexer
);
23838 c_kind
= cp_parser_omp_clause_name (parser
);
23843 case PRAGMA_OMP_CLAUSE_COLLAPSE
:
23844 clauses
= cp_parser_omp_clause_collapse (parser
, clauses
,
23846 c_name
= "collapse";
23848 case PRAGMA_OMP_CLAUSE_COPYIN
:
23849 clauses
= cp_parser_omp_var_list (parser
, OMP_CLAUSE_COPYIN
, clauses
);
23852 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
23853 clauses
= cp_parser_omp_var_list (parser
, OMP_CLAUSE_COPYPRIVATE
,
23855 c_name
= "copyprivate";
23857 case PRAGMA_OMP_CLAUSE_DEFAULT
:
23858 clauses
= cp_parser_omp_clause_default (parser
, clauses
,
23860 c_name
= "default";
23862 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
23863 clauses
= cp_parser_omp_var_list (parser
, OMP_CLAUSE_FIRSTPRIVATE
,
23865 c_name
= "firstprivate";
23867 case PRAGMA_OMP_CLAUSE_IF
:
23868 clauses
= cp_parser_omp_clause_if (parser
, clauses
, token
->location
);
23871 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
23872 clauses
= cp_parser_omp_var_list (parser
, OMP_CLAUSE_LASTPRIVATE
,
23874 c_name
= "lastprivate";
23876 case PRAGMA_OMP_CLAUSE_NOWAIT
:
23877 clauses
= cp_parser_omp_clause_nowait (parser
, clauses
, token
->location
);
23880 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
23881 clauses
= cp_parser_omp_clause_num_threads (parser
, clauses
,
23883 c_name
= "num_threads";
23885 case PRAGMA_OMP_CLAUSE_ORDERED
:
23886 clauses
= cp_parser_omp_clause_ordered (parser
, clauses
,
23888 c_name
= "ordered";
23890 case PRAGMA_OMP_CLAUSE_PRIVATE
:
23891 clauses
= cp_parser_omp_var_list (parser
, OMP_CLAUSE_PRIVATE
,
23893 c_name
= "private";
23895 case PRAGMA_OMP_CLAUSE_REDUCTION
:
23896 clauses
= cp_parser_omp_clause_reduction (parser
, clauses
);
23897 c_name
= "reduction";
23899 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
23900 clauses
= cp_parser_omp_clause_schedule (parser
, clauses
,
23902 c_name
= "schedule";
23904 case PRAGMA_OMP_CLAUSE_SHARED
:
23905 clauses
= cp_parser_omp_var_list (parser
, OMP_CLAUSE_SHARED
,
23909 case PRAGMA_OMP_CLAUSE_UNTIED
:
23910 clauses
= cp_parser_omp_clause_untied (parser
, clauses
,
23915 cp_parser_error (parser
, "expected %<#pragma omp%> clause");
23919 if (((mask
>> c_kind
) & 1) == 0)
23921 /* Remove the invalid clause(s) from the list to avoid
23922 confusing the rest of the compiler. */
23924 error_at (token
->location
, "%qs is not valid for %qs", c_name
, where
);
23928 cp_parser_skip_to_pragma_eol (parser
, pragma_tok
);
23929 return finish_omp_clauses (clauses
);
23936 In practice, we're also interested in adding the statement to an
23937 outer node. So it is convenient if we work around the fact that
23938 cp_parser_statement calls add_stmt. */
23941 cp_parser_begin_omp_structured_block (cp_parser
*parser
)
23943 unsigned save
= parser
->in_statement
;
23945 /* Only move the values to IN_OMP_BLOCK if they weren't false.
23946 This preserves the "not within loop or switch" style error messages
23947 for nonsense cases like
23953 if (parser
->in_statement
)
23954 parser
->in_statement
= IN_OMP_BLOCK
;
23960 cp_parser_end_omp_structured_block (cp_parser
*parser
, unsigned save
)
23962 parser
->in_statement
= save
;
23966 cp_parser_omp_structured_block (cp_parser
*parser
)
23968 tree stmt
= begin_omp_structured_block ();
23969 unsigned int save
= cp_parser_begin_omp_structured_block (parser
);
23971 cp_parser_statement (parser
, NULL_TREE
, false, NULL
);
23973 cp_parser_end_omp_structured_block (parser
, save
);
23974 return finish_omp_structured_block (stmt
);
23978 # pragma omp atomic new-line
23982 x binop= expr | x++ | ++x | x-- | --x
23984 +, *, -, /, &, ^, |, <<, >>
23986 where x is an lvalue expression with scalar type. */
23989 cp_parser_omp_atomic (cp_parser
*parser
, cp_token
*pragma_tok
)
23992 enum tree_code code
;
23994 cp_parser_require_pragma_eol (parser
, pragma_tok
);
23996 lhs
= cp_parser_unary_expression (parser
, /*address_p=*/false,
23997 /*cast_p=*/false, NULL
);
23998 switch (TREE_CODE (lhs
))
24003 case PREINCREMENT_EXPR
:
24004 case POSTINCREMENT_EXPR
:
24005 lhs
= TREE_OPERAND (lhs
, 0);
24007 rhs
= integer_one_node
;
24010 case PREDECREMENT_EXPR
:
24011 case POSTDECREMENT_EXPR
:
24012 lhs
= TREE_OPERAND (lhs
, 0);
24014 rhs
= integer_one_node
;
24017 case COMPOUND_EXPR
:
24018 if (TREE_CODE (TREE_OPERAND (lhs
, 0)) == SAVE_EXPR
24019 && TREE_CODE (TREE_OPERAND (lhs
, 1)) == COMPOUND_EXPR
24020 && TREE_CODE (TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0)) == MODIFY_EXPR
24021 && TREE_OPERAND (TREE_OPERAND (lhs
, 1), 1) == TREE_OPERAND (lhs
, 0)
24022 && TREE_CODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND
24023 (TREE_OPERAND (lhs
, 1), 0), 0)))
24025 /* Undo effects of boolean_increment for post {in,de}crement. */
24026 lhs
= TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0);
24029 if (TREE_CODE (lhs
) == MODIFY_EXPR
24030 && TREE_CODE (TREE_TYPE (TREE_OPERAND (lhs
, 0))) == BOOLEAN_TYPE
)
24032 /* Undo effects of boolean_increment. */
24033 if (integer_onep (TREE_OPERAND (lhs
, 1)))
24035 /* This is pre or post increment. */
24036 rhs
= TREE_OPERAND (lhs
, 1);
24037 lhs
= TREE_OPERAND (lhs
, 0);
24044 switch (cp_lexer_peek_token (parser
->lexer
)->type
)
24050 code
= TRUNC_DIV_EXPR
;
24058 case CPP_LSHIFT_EQ
:
24059 code
= LSHIFT_EXPR
;
24061 case CPP_RSHIFT_EQ
:
24062 code
= RSHIFT_EXPR
;
24065 code
= BIT_AND_EXPR
;
24068 code
= BIT_IOR_EXPR
;
24071 code
= BIT_XOR_EXPR
;
24074 cp_parser_error (parser
,
24075 "invalid operator for %<#pragma omp atomic%>");
24078 cp_lexer_consume_token (parser
->lexer
);
24080 rhs
= cp_parser_expression (parser
, false, NULL
);
24081 if (rhs
== error_mark_node
)
24085 finish_omp_atomic (code
, lhs
, rhs
);
24086 cp_parser_consume_semicolon_at_end_of_statement (parser
);
24090 cp_parser_skip_to_end_of_block_or_statement (parser
);
24095 # pragma omp barrier new-line */
24098 cp_parser_omp_barrier (cp_parser
*parser
, cp_token
*pragma_tok
)
24100 cp_parser_require_pragma_eol (parser
, pragma_tok
);
24101 finish_omp_barrier ();
24105 # pragma omp critical [(name)] new-line
24106 structured-block */
24109 cp_parser_omp_critical (cp_parser
*parser
, cp_token
*pragma_tok
)
24111 tree stmt
, name
= NULL
;
24113 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_PAREN
))
24115 cp_lexer_consume_token (parser
->lexer
);
24117 name
= cp_parser_identifier (parser
);
24119 if (name
== error_mark_node
24120 || !cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
24121 cp_parser_skip_to_closing_parenthesis (parser
, /*recovering=*/true,
24122 /*or_comma=*/false,
24123 /*consume_paren=*/true);
24124 if (name
== error_mark_node
)
24127 cp_parser_require_pragma_eol (parser
, pragma_tok
);
24129 stmt
= cp_parser_omp_structured_block (parser
);
24130 return c_finish_omp_critical (input_location
, stmt
, name
);
24134 # pragma omp flush flush-vars[opt] new-line
24137 ( variable-list ) */
24140 cp_parser_omp_flush (cp_parser
*parser
, cp_token
*pragma_tok
)
24142 if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_PAREN
))
24143 (void) cp_parser_omp_var_list (parser
, OMP_CLAUSE_ERROR
, NULL
);
24144 cp_parser_require_pragma_eol (parser
, pragma_tok
);
24146 finish_omp_flush ();
24149 /* Helper function, to parse omp for increment expression. */
24152 cp_parser_omp_for_cond (cp_parser
*parser
, tree decl
)
24154 tree cond
= cp_parser_binary_expression (parser
, false, true,
24155 PREC_NOT_OPERATOR
, NULL
);
24158 if (cond
== error_mark_node
24159 || cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
24161 cp_parser_skip_to_end_of_statement (parser
);
24162 return error_mark_node
;
24165 switch (TREE_CODE (cond
))
24173 return error_mark_node
;
24176 /* If decl is an iterator, preserve LHS and RHS of the relational
24177 expr until finish_omp_for. */
24179 && (type_dependent_expression_p (decl
)
24180 || CLASS_TYPE_P (TREE_TYPE (decl
))))
24183 return build_x_binary_op (TREE_CODE (cond
),
24184 TREE_OPERAND (cond
, 0), ERROR_MARK
,
24185 TREE_OPERAND (cond
, 1), ERROR_MARK
,
24186 &overloaded_p
, tf_warning_or_error
);
24189 /* Helper function, to parse omp for increment expression. */
24192 cp_parser_omp_for_incr (cp_parser
*parser
, tree decl
)
24194 cp_token
*token
= cp_lexer_peek_token (parser
->lexer
);
24200 if (token
->type
== CPP_PLUS_PLUS
|| token
->type
== CPP_MINUS_MINUS
)
24202 op
= (token
->type
== CPP_PLUS_PLUS
24203 ? PREINCREMENT_EXPR
: PREDECREMENT_EXPR
);
24204 cp_lexer_consume_token (parser
->lexer
);
24205 lhs
= cp_parser_cast_expression (parser
, false, false, NULL
);
24207 return error_mark_node
;
24208 return build2 (op
, TREE_TYPE (decl
), decl
, NULL_TREE
);
24211 lhs
= cp_parser_primary_expression (parser
, false, false, false, &idk
);
24213 return error_mark_node
;
24215 token
= cp_lexer_peek_token (parser
->lexer
);
24216 if (token
->type
== CPP_PLUS_PLUS
|| token
->type
== CPP_MINUS_MINUS
)
24218 op
= (token
->type
== CPP_PLUS_PLUS
24219 ? POSTINCREMENT_EXPR
: POSTDECREMENT_EXPR
);
24220 cp_lexer_consume_token (parser
->lexer
);
24221 return build2 (op
, TREE_TYPE (decl
), decl
, NULL_TREE
);
24224 op
= cp_parser_assignment_operator_opt (parser
);
24225 if (op
== ERROR_MARK
)
24226 return error_mark_node
;
24228 if (op
!= NOP_EXPR
)
24230 rhs
= cp_parser_assignment_expression (parser
, false, NULL
);
24231 rhs
= build2 (op
, TREE_TYPE (decl
), decl
, rhs
);
24232 return build2 (MODIFY_EXPR
, TREE_TYPE (decl
), decl
, rhs
);
24235 lhs
= cp_parser_binary_expression (parser
, false, false,
24236 PREC_ADDITIVE_EXPRESSION
, NULL
);
24237 token
= cp_lexer_peek_token (parser
->lexer
);
24238 decl_first
= lhs
== decl
;
24241 if (token
->type
!= CPP_PLUS
24242 && token
->type
!= CPP_MINUS
)
24243 return error_mark_node
;
24247 op
= token
->type
== CPP_PLUS
? PLUS_EXPR
: MINUS_EXPR
;
24248 cp_lexer_consume_token (parser
->lexer
);
24249 rhs
= cp_parser_binary_expression (parser
, false, false,
24250 PREC_ADDITIVE_EXPRESSION
, NULL
);
24251 token
= cp_lexer_peek_token (parser
->lexer
);
24252 if (token
->type
== CPP_PLUS
|| token
->type
== CPP_MINUS
|| decl_first
)
24254 if (lhs
== NULL_TREE
)
24256 if (op
== PLUS_EXPR
)
24259 lhs
= build_x_unary_op (NEGATE_EXPR
, rhs
, tf_warning_or_error
);
24262 lhs
= build_x_binary_op (op
, lhs
, ERROR_MARK
, rhs
, ERROR_MARK
,
24263 NULL
, tf_warning_or_error
);
24266 while (token
->type
== CPP_PLUS
|| token
->type
== CPP_MINUS
);
24270 if (rhs
!= decl
|| op
== MINUS_EXPR
)
24271 return error_mark_node
;
24272 rhs
= build2 (op
, TREE_TYPE (decl
), lhs
, decl
);
24275 rhs
= build2 (PLUS_EXPR
, TREE_TYPE (decl
), decl
, lhs
);
24277 return build2 (MODIFY_EXPR
, TREE_TYPE (decl
), decl
, rhs
);
24280 /* Parse the restricted form of the for statement allowed by OpenMP. */
24283 cp_parser_omp_for_loop (cp_parser
*parser
, tree clauses
, tree
*par_clauses
)
24285 tree init
, cond
, incr
, body
, decl
, pre_body
= NULL_TREE
, ret
;
24286 tree real_decl
, initv
, condv
, incrv
, declv
;
24287 tree this_pre_body
, cl
;
24288 location_t loc_first
;
24289 bool collapse_err
= false;
24290 int i
, collapse
= 1, nbraces
= 0;
24291 VEC(tree
,gc
) *for_block
= make_tree_vector ();
24293 for (cl
= clauses
; cl
; cl
= OMP_CLAUSE_CHAIN (cl
))
24294 if (OMP_CLAUSE_CODE (cl
) == OMP_CLAUSE_COLLAPSE
)
24295 collapse
= tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl
), 0);
24297 gcc_assert (collapse
>= 1);
24299 declv
= make_tree_vec (collapse
);
24300 initv
= make_tree_vec (collapse
);
24301 condv
= make_tree_vec (collapse
);
24302 incrv
= make_tree_vec (collapse
);
24304 loc_first
= cp_lexer_peek_token (parser
->lexer
)->location
;
24306 for (i
= 0; i
< collapse
; i
++)
24308 int bracecount
= 0;
24309 bool add_private_clause
= false;
24312 if (!cp_lexer_next_token_is_keyword (parser
->lexer
, RID_FOR
))
24314 cp_parser_error (parser
, "for statement expected");
24317 loc
= cp_lexer_consume_token (parser
->lexer
)->location
;
24319 if (!cp_parser_require (parser
, CPP_OPEN_PAREN
, RT_OPEN_PAREN
))
24322 init
= decl
= real_decl
= NULL
;
24323 this_pre_body
= push_stmt_list ();
24324 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
24326 /* See 2.5.1 (in OpenMP 3.0, similar wording is in 2.5 standard too):
24330 integer-type var = lb
24331 random-access-iterator-type var = lb
24332 pointer-type var = lb
24334 cp_decl_specifier_seq type_specifiers
;
24336 /* First, try to parse as an initialized declaration. See
24337 cp_parser_condition, from whence the bulk of this is copied. */
24339 cp_parser_parse_tentatively (parser
);
24340 cp_parser_type_specifier_seq (parser
, /*is_declaration=*/true,
24341 /*is_trailing_return=*/false,
24343 if (cp_parser_parse_definitely (parser
))
24345 /* If parsing a type specifier seq succeeded, then this
24346 MUST be a initialized declaration. */
24347 tree asm_specification
, attributes
;
24348 cp_declarator
*declarator
;
24350 declarator
= cp_parser_declarator (parser
,
24351 CP_PARSER_DECLARATOR_NAMED
,
24352 /*ctor_dtor_or_conv_p=*/NULL
,
24353 /*parenthesized_p=*/NULL
,
24354 /*member_p=*/false);
24355 attributes
= cp_parser_attributes_opt (parser
);
24356 asm_specification
= cp_parser_asm_specification_opt (parser
);
24358 if (declarator
== cp_error_declarator
)
24359 cp_parser_skip_to_end_of_statement (parser
);
24363 tree pushed_scope
, auto_node
;
24365 decl
= start_decl (declarator
, &type_specifiers
,
24366 SD_INITIALIZED
, attributes
,
24367 /*prefix_attributes=*/NULL_TREE
,
24370 auto_node
= type_uses_auto (TREE_TYPE (decl
));
24371 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_EQ
))
24373 if (cp_lexer_next_token_is (parser
->lexer
,
24375 error ("parenthesized initialization is not allowed in "
24376 "OpenMP %<for%> loop");
24378 /* Trigger an error. */
24379 cp_parser_require (parser
, CPP_EQ
, RT_EQ
);
24381 init
= error_mark_node
;
24382 cp_parser_skip_to_end_of_statement (parser
);
24384 else if (CLASS_TYPE_P (TREE_TYPE (decl
))
24385 || type_dependent_expression_p (decl
)
24388 bool is_direct_init
, is_non_constant_init
;
24390 init
= cp_parser_initializer (parser
,
24392 &is_non_constant_init
);
24394 if (auto_node
&& describable_type (init
))
24397 = do_auto_deduction (TREE_TYPE (decl
), init
,
24400 if (!CLASS_TYPE_P (TREE_TYPE (decl
))
24401 && !type_dependent_expression_p (decl
))
24405 cp_finish_decl (decl
, init
, !is_non_constant_init
,
24407 LOOKUP_ONLYCONVERTING
);
24408 if (CLASS_TYPE_P (TREE_TYPE (decl
)))
24410 VEC_safe_push (tree
, gc
, for_block
, this_pre_body
);
24414 init
= pop_stmt_list (this_pre_body
);
24415 this_pre_body
= NULL_TREE
;
24420 cp_lexer_consume_token (parser
->lexer
);
24421 init
= cp_parser_assignment_expression (parser
, false, NULL
);
24424 if (TREE_CODE (TREE_TYPE (decl
)) == REFERENCE_TYPE
)
24425 init
= error_mark_node
;
24427 cp_finish_decl (decl
, NULL_TREE
,
24428 /*init_const_expr_p=*/false,
24430 LOOKUP_ONLYCONVERTING
);
24434 pop_scope (pushed_scope
);
24440 /* If parsing a type specifier sequence failed, then
24441 this MUST be a simple expression. */
24442 cp_parser_parse_tentatively (parser
);
24443 decl
= cp_parser_primary_expression (parser
, false, false,
24445 if (!cp_parser_error_occurred (parser
)
24448 && CLASS_TYPE_P (TREE_TYPE (decl
)))
24452 cp_parser_parse_definitely (parser
);
24453 cp_parser_require (parser
, CPP_EQ
, RT_EQ
);
24454 rhs
= cp_parser_assignment_expression (parser
, false, NULL
);
24455 finish_expr_stmt (build_x_modify_expr (decl
, NOP_EXPR
,
24457 tf_warning_or_error
));
24458 add_private_clause
= true;
24463 cp_parser_abort_tentative_parse (parser
);
24464 init
= cp_parser_expression (parser
, false, NULL
);
24467 if (TREE_CODE (init
) == MODIFY_EXPR
24468 || TREE_CODE (init
) == MODOP_EXPR
)
24469 real_decl
= TREE_OPERAND (init
, 0);
24474 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
24477 this_pre_body
= pop_stmt_list (this_pre_body
);
24481 pre_body
= push_stmt_list ();
24483 add_stmt (this_pre_body
);
24484 pre_body
= pop_stmt_list (pre_body
);
24487 pre_body
= this_pre_body
;
24492 if (par_clauses
!= NULL
&& real_decl
!= NULL_TREE
)
24495 for (c
= par_clauses
; *c
; )
24496 if (OMP_CLAUSE_CODE (*c
) == OMP_CLAUSE_FIRSTPRIVATE
24497 && OMP_CLAUSE_DECL (*c
) == real_decl
)
24499 error_at (loc
, "iteration variable %qD"
24500 " should not be firstprivate", real_decl
);
24501 *c
= OMP_CLAUSE_CHAIN (*c
);
24503 else if (OMP_CLAUSE_CODE (*c
) == OMP_CLAUSE_LASTPRIVATE
24504 && OMP_CLAUSE_DECL (*c
) == real_decl
)
24506 /* Add lastprivate (decl) clause to OMP_FOR_CLAUSES,
24507 change it to shared (decl) in OMP_PARALLEL_CLAUSES. */
24508 tree l
= build_omp_clause (loc
, OMP_CLAUSE_LASTPRIVATE
);
24509 OMP_CLAUSE_DECL (l
) = real_decl
;
24510 OMP_CLAUSE_CHAIN (l
) = clauses
;
24511 CP_OMP_CLAUSE_INFO (l
) = CP_OMP_CLAUSE_INFO (*c
);
24513 OMP_CLAUSE_SET_CODE (*c
, OMP_CLAUSE_SHARED
);
24514 CP_OMP_CLAUSE_INFO (*c
) = NULL
;
24515 add_private_clause
= false;
24519 if (OMP_CLAUSE_CODE (*c
) == OMP_CLAUSE_PRIVATE
24520 && OMP_CLAUSE_DECL (*c
) == real_decl
)
24521 add_private_clause
= false;
24522 c
= &OMP_CLAUSE_CHAIN (*c
);
24526 if (add_private_clause
)
24529 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
24531 if ((OMP_CLAUSE_CODE (c
) == OMP_CLAUSE_PRIVATE
24532 || OMP_CLAUSE_CODE (c
) == OMP_CLAUSE_LASTPRIVATE
)
24533 && OMP_CLAUSE_DECL (c
) == decl
)
24535 else if (OMP_CLAUSE_CODE (c
) == OMP_CLAUSE_FIRSTPRIVATE
24536 && OMP_CLAUSE_DECL (c
) == decl
)
24537 error_at (loc
, "iteration variable %qD "
24538 "should not be firstprivate",
24540 else if (OMP_CLAUSE_CODE (c
) == OMP_CLAUSE_REDUCTION
24541 && OMP_CLAUSE_DECL (c
) == decl
)
24542 error_at (loc
, "iteration variable %qD should not be reduction",
24547 c
= build_omp_clause (loc
, OMP_CLAUSE_PRIVATE
);
24548 OMP_CLAUSE_DECL (c
) = decl
;
24549 c
= finish_omp_clauses (c
);
24552 OMP_CLAUSE_CHAIN (c
) = clauses
;
24559 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_SEMICOLON
))
24560 cond
= cp_parser_omp_for_cond (parser
, decl
);
24561 cp_parser_require (parser
, CPP_SEMICOLON
, RT_SEMICOLON
);
24564 if (cp_lexer_next_token_is_not (parser
->lexer
, CPP_CLOSE_PAREN
))
24566 /* If decl is an iterator, preserve the operator on decl
24567 until finish_omp_for. */
24569 && (type_dependent_expression_p (decl
)
24570 || CLASS_TYPE_P (TREE_TYPE (decl
))))
24571 incr
= cp_parser_omp_for_incr (parser
, decl
);
24573 incr
= cp_parser_expression (parser
, false, NULL
);
24576 if (!cp_parser_require (parser
, CPP_CLOSE_PAREN
, RT_CLOSE_PAREN
))
24577 cp_parser_skip_to_closing_parenthesis (parser
, /*recovering=*/true,
24578 /*or_comma=*/false,
24579 /*consume_paren=*/true);
24581 TREE_VEC_ELT (declv
, i
) = decl
;
24582 TREE_VEC_ELT (initv
, i
) = init
;
24583 TREE_VEC_ELT (condv
, i
) = cond
;
24584 TREE_VEC_ELT (incrv
, i
) = incr
;
24586 if (i
== collapse
- 1)
24589 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
24590 in between the collapsed for loops to be still considered perfectly
24591 nested. Hopefully the final version clarifies this.
24592 For now handle (multiple) {'s and empty statements. */
24593 cp_parser_parse_tentatively (parser
);
24596 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_FOR
))
24598 else if (cp_lexer_next_token_is (parser
->lexer
, CPP_OPEN_BRACE
))
24600 cp_lexer_consume_token (parser
->lexer
);
24603 else if (bracecount
24604 && cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
24605 cp_lexer_consume_token (parser
->lexer
);
24608 loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
24609 error_at (loc
, "not enough collapsed for loops");
24610 collapse_err
= true;
24611 cp_parser_abort_tentative_parse (parser
);
24620 cp_parser_parse_definitely (parser
);
24621 nbraces
+= bracecount
;
24625 /* Note that we saved the original contents of this flag when we entered
24626 the structured block, and so we don't need to re-save it here. */
24627 parser
->in_statement
= IN_OMP_FOR
;
24629 /* Note that the grammar doesn't call for a structured block here,
24630 though the loop as a whole is a structured block. */
24631 body
= push_stmt_list ();
24632 cp_parser_statement (parser
, NULL_TREE
, false, NULL
);
24633 body
= pop_stmt_list (body
);
24635 if (declv
== NULL_TREE
)
24638 ret
= finish_omp_for (loc_first
, declv
, initv
, condv
, incrv
, body
,
24639 pre_body
, clauses
);
24643 if (cp_lexer_next_token_is (parser
->lexer
, CPP_CLOSE_BRACE
))
24645 cp_lexer_consume_token (parser
->lexer
);
24648 else if (cp_lexer_next_token_is (parser
->lexer
, CPP_SEMICOLON
))
24649 cp_lexer_consume_token (parser
->lexer
);
24654 error_at (cp_lexer_peek_token (parser
->lexer
)->location
,
24655 "collapsed loops not perfectly nested");
24657 collapse_err
= true;
24658 cp_parser_statement_seq_opt (parser
, NULL
);
24659 if (cp_lexer_next_token_is (parser
->lexer
, CPP_EOF
))
24664 while (!VEC_empty (tree
, for_block
))
24665 add_stmt (pop_stmt_list (VEC_pop (tree
, for_block
)));
24666 release_tree_vector (for_block
);
24672 #pragma omp for for-clause[optseq] new-line
24675 #define OMP_FOR_CLAUSE_MASK \
24676 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
24677 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
24678 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
24679 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
24680 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
24681 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
24682 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT) \
24683 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE))
24686 cp_parser_omp_for (cp_parser
*parser
, cp_token
*pragma_tok
)
24688 tree clauses
, sb
, ret
;
24691 clauses
= cp_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
24692 "#pragma omp for", pragma_tok
);
24694 sb
= begin_omp_structured_block ();
24695 save
= cp_parser_begin_omp_structured_block (parser
);
24697 ret
= cp_parser_omp_for_loop (parser
, clauses
, NULL
);
24699 cp_parser_end_omp_structured_block (parser
, save
);
24700 add_stmt (finish_omp_structured_block (sb
));
24706 # pragma omp master new-line
24707 structured-block */
24710 cp_parser_omp_master (cp_parser
*parser
, cp_token
*pragma_tok
)
24712 cp_parser_require_pragma_eol (parser
, pragma_tok
);
24713 return c_finish_omp_master (input_location
,
24714 cp_parser_omp_structured_block (parser
));
24718 # pragma omp ordered new-line
24719 structured-block */
24722 cp_parser_omp_ordered (cp_parser
*parser
, cp_token
*pragma_tok
)
24724 location_t loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
24725 cp_parser_require_pragma_eol (parser
, pragma_tok
);
24726 return c_finish_omp_ordered (loc
, cp_parser_omp_structured_block (parser
));
24732 { section-sequence }
24735 section-directive[opt] structured-block
24736 section-sequence section-directive structured-block */
24739 cp_parser_omp_sections_scope (cp_parser
*parser
)
24741 tree stmt
, substmt
;
24742 bool error_suppress
= false;
24745 if (!cp_parser_require (parser
, CPP_OPEN_BRACE
, RT_OPEN_BRACE
))
24748 stmt
= push_stmt_list ();
24750 if (cp_lexer_peek_token (parser
->lexer
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
24754 substmt
= begin_omp_structured_block ();
24755 save
= cp_parser_begin_omp_structured_block (parser
);
24759 cp_parser_statement (parser
, NULL_TREE
, false, NULL
);
24761 tok
= cp_lexer_peek_token (parser
->lexer
);
24762 if (tok
->pragma_kind
== PRAGMA_OMP_SECTION
)
24764 if (tok
->type
== CPP_CLOSE_BRACE
)
24766 if (tok
->type
== CPP_EOF
)
24770 cp_parser_end_omp_structured_block (parser
, save
);
24771 substmt
= finish_omp_structured_block (substmt
);
24772 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
24773 add_stmt (substmt
);
24778 tok
= cp_lexer_peek_token (parser
->lexer
);
24779 if (tok
->type
== CPP_CLOSE_BRACE
)
24781 if (tok
->type
== CPP_EOF
)
24784 if (tok
->pragma_kind
== PRAGMA_OMP_SECTION
)
24786 cp_lexer_consume_token (parser
->lexer
);
24787 cp_parser_require_pragma_eol (parser
, tok
);
24788 error_suppress
= false;
24790 else if (!error_suppress
)
24792 cp_parser_error (parser
, "expected %<#pragma omp section%> or %<}%>");
24793 error_suppress
= true;
24796 substmt
= cp_parser_omp_structured_block (parser
);
24797 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
24798 add_stmt (substmt
);
24800 cp_parser_require (parser
, CPP_CLOSE_BRACE
, RT_CLOSE_BRACE
);
24802 substmt
= pop_stmt_list (stmt
);
24804 stmt
= make_node (OMP_SECTIONS
);
24805 TREE_TYPE (stmt
) = void_type_node
;
24806 OMP_SECTIONS_BODY (stmt
) = substmt
;
24813 # pragma omp sections sections-clause[optseq] newline
24816 #define OMP_SECTIONS_CLAUSE_MASK \
24817 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
24818 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
24819 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
24820 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
24821 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
24824 cp_parser_omp_sections (cp_parser
*parser
, cp_token
*pragma_tok
)
24828 clauses
= cp_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
24829 "#pragma omp sections", pragma_tok
);
24831 ret
= cp_parser_omp_sections_scope (parser
);
24833 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
24839 # pragma parallel parallel-clause new-line
24840 # pragma parallel for parallel-for-clause new-line
24841 # pragma parallel sections parallel-sections-clause new-line */
24843 #define OMP_PARALLEL_CLAUSE_MASK \
24844 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
24845 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
24846 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
24847 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
24848 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
24849 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
24850 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
24851 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
24854 cp_parser_omp_parallel (cp_parser
*parser
, cp_token
*pragma_tok
)
24856 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
24857 const char *p_name
= "#pragma omp parallel";
24858 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
24859 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
24861 location_t loc
= cp_lexer_peek_token (parser
->lexer
)->location
;
24863 if (cp_lexer_next_token_is_keyword (parser
->lexer
, RID_FOR
))
24865 cp_lexer_consume_token (parser
->lexer
);
24866 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
24867 p_name
= "#pragma omp parallel for";
24868 mask
|= OMP_FOR_CLAUSE_MASK
;
24869 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
24871 else if (cp_lexer_next_token_is (parser
->lexer
, CPP_NAME
))
24873 tree id
= cp_lexer_peek_token (parser
->lexer
)->u
.value
;
24874 const char *p
= IDENTIFIER_POINTER (id
);
24875 if (strcmp (p
, "sections") == 0)
24877 cp_lexer_consume_token (parser
->lexer
);
24878 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
24879 p_name
= "#pragma omp parallel sections";
24880 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
24881 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
24885 clauses
= cp_parser_omp_all_clauses (parser
, mask
, p_name
, pragma_tok
);
24886 block
= begin_omp_parallel ();
24887 save
= cp_parser_begin_omp_structured_block (parser
);
24891 case PRAGMA_OMP_PARALLEL
:
24892 cp_parser_statement (parser
, NULL_TREE
, false, NULL
);
24893 par_clause
= clauses
;
24896 case PRAGMA_OMP_PARALLEL_FOR
:
24897 c_split_parallel_clauses (loc
, clauses
, &par_clause
, &ws_clause
);
24898 cp_parser_omp_for_loop (parser
, ws_clause
, &par_clause
);
24901 case PRAGMA_OMP_PARALLEL_SECTIONS
:
24902 c_split_parallel_clauses (loc
, clauses
, &par_clause
, &ws_clause
);
24903 stmt
= cp_parser_omp_sections_scope (parser
);
24905 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
24909 gcc_unreachable ();
24912 cp_parser_end_omp_structured_block (parser
, save
);
24913 stmt
= finish_omp_parallel (par_clause
, block
);
24914 if (p_kind
!= PRAGMA_OMP_PARALLEL
)
24915 OMP_PARALLEL_COMBINED (stmt
) = 1;
24920 # pragma omp single single-clause[optseq] new-line
24921 structured-block */
24923 #define OMP_SINGLE_CLAUSE_MASK \
24924 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
24925 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
24926 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
24927 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
24930 cp_parser_omp_single (cp_parser
*parser
, cp_token
*pragma_tok
)
24932 tree stmt
= make_node (OMP_SINGLE
);
24933 TREE_TYPE (stmt
) = void_type_node
;
24935 OMP_SINGLE_CLAUSES (stmt
)
24936 = cp_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
24937 "#pragma omp single", pragma_tok
);
24938 OMP_SINGLE_BODY (stmt
) = cp_parser_omp_structured_block (parser
);
24940 return add_stmt (stmt
);
24944 # pragma omp task task-clause[optseq] new-line
24945 structured-block */
24947 #define OMP_TASK_CLAUSE_MASK \
24948 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
24949 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
24950 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
24951 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
24952 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
24953 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
24956 cp_parser_omp_task (cp_parser
*parser
, cp_token
*pragma_tok
)
24958 tree clauses
, block
;
24961 clauses
= cp_parser_omp_all_clauses (parser
, OMP_TASK_CLAUSE_MASK
,
24962 "#pragma omp task", pragma_tok
);
24963 block
= begin_omp_task ();
24964 save
= cp_parser_begin_omp_structured_block (parser
);
24965 cp_parser_statement (parser
, NULL_TREE
, false, NULL
);
24966 cp_parser_end_omp_structured_block (parser
, save
);
24967 return finish_omp_task (clauses
, block
);
24971 # pragma omp taskwait new-line */
24974 cp_parser_omp_taskwait (cp_parser
*parser
, cp_token
*pragma_tok
)
24976 cp_parser_require_pragma_eol (parser
, pragma_tok
);
24977 finish_omp_taskwait ();
24981 # pragma omp threadprivate (variable-list) */
24984 cp_parser_omp_threadprivate (cp_parser
*parser
, cp_token
*pragma_tok
)
24988 vars
= cp_parser_omp_var_list (parser
, OMP_CLAUSE_ERROR
, NULL
);
24989 cp_parser_require_pragma_eol (parser
, pragma_tok
);
24991 finish_omp_threadprivate (vars
);
24994 /* Main entry point to OpenMP statement pragmas. */
24997 cp_parser_omp_construct (cp_parser
*parser
, cp_token
*pragma_tok
)
25001 switch (pragma_tok
->pragma_kind
)
25003 case PRAGMA_OMP_ATOMIC
:
25004 cp_parser_omp_atomic (parser
, pragma_tok
);
25006 case PRAGMA_OMP_CRITICAL
:
25007 stmt
= cp_parser_omp_critical (parser
, pragma_tok
);
25009 case PRAGMA_OMP_FOR
:
25010 stmt
= cp_parser_omp_for (parser
, pragma_tok
);
25012 case PRAGMA_OMP_MASTER
:
25013 stmt
= cp_parser_omp_master (parser
, pragma_tok
);
25015 case PRAGMA_OMP_ORDERED
:
25016 stmt
= cp_parser_omp_ordered (parser
, pragma_tok
);
25018 case PRAGMA_OMP_PARALLEL
:
25019 stmt
= cp_parser_omp_parallel (parser
, pragma_tok
);
25021 case PRAGMA_OMP_SECTIONS
:
25022 stmt
= cp_parser_omp_sections (parser
, pragma_tok
);
25024 case PRAGMA_OMP_SINGLE
:
25025 stmt
= cp_parser_omp_single (parser
, pragma_tok
);
25027 case PRAGMA_OMP_TASK
:
25028 stmt
= cp_parser_omp_task (parser
, pragma_tok
);
25031 gcc_unreachable ();
25035 SET_EXPR_LOCATION (stmt
, pragma_tok
->location
);
25040 static GTY (()) cp_parser
*the_parser
;
25043 /* Special handling for the first token or line in the file. The first
25044 thing in the file might be #pragma GCC pch_preprocess, which loads a
25045 PCH file, which is a GC collection point. So we need to handle this
25046 first pragma without benefit of an existing lexer structure.
25048 Always returns one token to the caller in *FIRST_TOKEN. This is
25049 either the true first token of the file, or the first token after
25050 the initial pragma. */
25053 cp_parser_initial_pragma (cp_token
*first_token
)
25057 cp_lexer_get_preprocessor_token (NULL
, first_token
);
25058 if (first_token
->pragma_kind
!= PRAGMA_GCC_PCH_PREPROCESS
)
25061 cp_lexer_get_preprocessor_token (NULL
, first_token
);
25062 if (first_token
->type
== CPP_STRING
)
25064 name
= first_token
->u
.value
;
25066 cp_lexer_get_preprocessor_token (NULL
, first_token
);
25067 if (first_token
->type
!= CPP_PRAGMA_EOL
)
25068 error_at (first_token
->location
,
25069 "junk at end of %<#pragma GCC pch_preprocess%>");
25072 error_at (first_token
->location
, "expected string literal");
25074 /* Skip to the end of the pragma. */
25075 while (first_token
->type
!= CPP_PRAGMA_EOL
&& first_token
->type
!= CPP_EOF
)
25076 cp_lexer_get_preprocessor_token (NULL
, first_token
);
25078 /* Now actually load the PCH file. */
25080 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
25082 /* Read one more token to return to our caller. We have to do this
25083 after reading the PCH file in, since its pointers have to be
25085 cp_lexer_get_preprocessor_token (NULL
, first_token
);
25088 /* Normal parsing of a pragma token. Here we can (and must) use the
25092 cp_parser_pragma (cp_parser
*parser
, enum pragma_context context
)
25094 cp_token
*pragma_tok
;
25097 pragma_tok
= cp_lexer_consume_token (parser
->lexer
);
25098 gcc_assert (pragma_tok
->type
== CPP_PRAGMA
);
25099 parser
->lexer
->in_pragma
= true;
25101 id
= pragma_tok
->pragma_kind
;
25104 case PRAGMA_GCC_PCH_PREPROCESS
:
25105 error_at (pragma_tok
->location
,
25106 "%<#pragma GCC pch_preprocess%> must be first");
25109 case PRAGMA_OMP_BARRIER
:
25112 case pragma_compound
:
25113 cp_parser_omp_barrier (parser
, pragma_tok
);
25116 error_at (pragma_tok
->location
, "%<#pragma omp barrier%> may only be "
25117 "used in compound statements");
25124 case PRAGMA_OMP_FLUSH
:
25127 case pragma_compound
:
25128 cp_parser_omp_flush (parser
, pragma_tok
);
25131 error_at (pragma_tok
->location
, "%<#pragma omp flush%> may only be "
25132 "used in compound statements");
25139 case PRAGMA_OMP_TASKWAIT
:
25142 case pragma_compound
:
25143 cp_parser_omp_taskwait (parser
, pragma_tok
);
25146 error_at (pragma_tok
->location
,
25147 "%<#pragma omp taskwait%> may only be "
25148 "used in compound statements");
25155 case PRAGMA_OMP_THREADPRIVATE
:
25156 cp_parser_omp_threadprivate (parser
, pragma_tok
);
25159 case PRAGMA_OMP_ATOMIC
:
25160 case PRAGMA_OMP_CRITICAL
:
25161 case PRAGMA_OMP_FOR
:
25162 case PRAGMA_OMP_MASTER
:
25163 case PRAGMA_OMP_ORDERED
:
25164 case PRAGMA_OMP_PARALLEL
:
25165 case PRAGMA_OMP_SECTIONS
:
25166 case PRAGMA_OMP_SINGLE
:
25167 case PRAGMA_OMP_TASK
:
25168 if (context
== pragma_external
)
25170 cp_parser_omp_construct (parser
, pragma_tok
);
25173 case PRAGMA_OMP_SECTION
:
25174 error_at (pragma_tok
->location
,
25175 "%<#pragma omp section%> may only be used in "
25176 "%<#pragma omp sections%> construct");
25180 gcc_assert (id
>= PRAGMA_FIRST_EXTERNAL
);
25181 c_invoke_pragma_handler (id
);
25185 cp_parser_error (parser
, "expected declaration specifiers");
25189 cp_parser_skip_to_pragma_eol (parser
, pragma_tok
);
25193 /* The interface the pragma parsers have to the lexer. */
25196 pragma_lex (tree
*value
)
25199 enum cpp_ttype ret
;
25201 tok
= cp_lexer_peek_token (the_parser
->lexer
);
25204 *value
= tok
->u
.value
;
25206 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
25208 else if (ret
== CPP_STRING
)
25209 *value
= cp_parser_string_literal (the_parser
, false, false);
25212 cp_lexer_consume_token (the_parser
->lexer
);
25213 if (ret
== CPP_KEYWORD
)
25221 /* External interface. */
25223 /* Parse one entire translation unit. */
25226 c_parse_file (void)
25228 static bool already_called
= false;
25230 if (already_called
)
25232 sorry ("inter-module optimizations not implemented for C++");
25235 already_called
= true;
25237 the_parser
= cp_parser_new ();
25238 push_deferring_access_checks (flag_access_control
25239 ? dk_no_deferred
: dk_no_check
);
25240 cp_parser_translation_unit (the_parser
);
25244 #include "gt-cp-parser.h"