1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
38 #include "tree-iterator.h"
39 #include "tree-inline.h"
47 #include "c-family/c-common.h"
48 #include "c-family/c-objc.h"
49 #include "c-family/c-pragma.h"
50 #include "diagnostic.h"
54 #include "pointer-set.h"
55 #include "splay-tree.h"
58 /* Possible cases of bad specifiers type used by bad_specifiers. */
60 BSP_VAR
, /* variable */
61 BSP_PARM
, /* parameter */
66 static tree
grokparms (tree parmlist
, tree
*);
67 static const char *redeclaration_error_message (tree
, tree
);
69 static int decl_jump_unsafe (tree
);
70 static void require_complete_types_for_parms (tree
);
71 static int ambi_op_p (enum tree_code
);
72 static int unary_op_p (enum tree_code
);
73 static void push_local_name (tree
);
74 static tree
grok_reference_init (tree
, tree
, tree
, tree
*);
75 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
77 static int check_static_variable_definition (tree
, tree
);
78 static void record_unknown_type (tree
, const char *);
79 static tree
builtin_function_1 (tree
, tree
, bool);
80 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
81 static int member_function_or_else (tree
, tree
, enum overload_flags
);
82 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
84 static void check_for_uninitialized_const_var (tree
);
85 static hashval_t
typename_hash (const void *);
86 static int typename_compare (const void *, const void *);
87 static tree
local_variable_p_walkfn (tree
*, int *, void *);
88 static tree
record_builtin_java_type (const char *, int);
89 static const char *tag_name (enum tag_types
);
90 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
91 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
92 static void maybe_deduce_size_from_array_init (tree
, tree
);
93 static void layout_var_decl (tree
);
94 static tree
check_initializer (tree
, tree
, int, tree
*);
95 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
96 static void save_function_data (tree
);
97 static void copy_type_enum (tree
, tree
);
98 static void check_function_type (tree
, tree
);
99 static void finish_constructor_body (void);
100 static void begin_destructor_body (void);
101 static void finish_destructor_body (void);
102 static void record_key_method_defined (tree
);
103 static tree
create_array_type_for_decl (tree
, tree
, tree
);
104 static tree
get_atexit_node (void);
105 static tree
get_dso_handle_node (void);
106 static tree
start_cleanup_fn (void);
107 static void end_cleanup_fn (void);
108 static tree
cp_make_fname_decl (location_t
, tree
, int);
109 static void initialize_predefined_identifiers (void);
110 static tree check_special_function_return_type
111 (special_function_kind
, tree
, tree
);
112 static tree
push_cp_library_fn (enum tree_code
, tree
);
113 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
114 static void store_parm_decls (tree
);
115 static void initialize_local_var (tree
, tree
);
116 static void expand_static_init (tree
, tree
);
118 /* The following symbols are subsumed in the cp_global_trees array, and
119 listed here individually for documentation purposes.
122 tree wchar_decl_node;
124 tree vtable_entry_type;
125 tree delta_type_node;
126 tree __t_desc_type_node;
128 tree class_type_node;
129 tree unknown_type_node;
131 Array type `vtable_entry_type[]'
134 tree vtbl_ptr_type_node;
141 A FUNCTION_DECL which can call `abort'. Not necessarily the
142 one that the user will declare, but sufficient to be called
143 by routines that want to abort the program.
147 The FUNCTION_DECL for the default `::operator delete'.
149 tree global_delete_fndecl;
152 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
153 tree tinfo_var_id; */
155 tree cp_global_trees
[CPTI_MAX
];
157 /* Indicates that there is a type value in some namespace, although
158 that is not necessarily in scope at the moment. */
160 tree global_type_node
;
162 /* The node that holds the "name" of the global scope. */
163 tree global_scope_name
;
165 #define local_names cp_function_chain->x_local_names
167 /* A list of objects which have constructors or destructors
168 which reside in the global scope. The decl is stored in
169 the TREE_VALUE slot and the initializer is stored
170 in the TREE_PURPOSE slot. */
171 tree static_aggregates
;
175 /* A node for the integer constant 2. */
177 tree integer_two_node
;
179 /* Used only for jumps to as-yet undefined labels, since jumps to
180 defined labels can have their validity checked immediately. */
182 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
183 struct named_label_use_entry
*next
;
184 /* The binding level to which this entry is *currently* attached.
185 This is initially the binding level in which the goto appeared,
186 but is modified as scopes are closed. */
187 cp_binding_level
*binding_level
;
188 /* The head of the names list that was current when the goto appeared,
189 or the inner scope popped. These are the decls that will *not* be
190 skipped when jumping to the label. */
192 /* The location of the goto, for error reporting. */
193 location_t o_goto_locus
;
194 /* True if an OpenMP structured block scope has been closed since
195 the goto appeared. This means that the branch from the label will
196 illegally exit an OpenMP scope. */
200 /* A list of all LABEL_DECLs in the function that have names. Here so
201 we can clear out their names' definitions at the end of the
202 function, and so we can check the validity of jumps to these labels. */
204 struct GTY(()) named_label_entry
{
205 /* The decl itself. */
208 /* The binding level to which the label is *currently* attached.
209 This is initially set to the binding level in which the label
210 is defined, but is modified as scopes are closed. */
211 cp_binding_level
*binding_level
;
212 /* The head of the names list that was current when the label was
213 defined, or the inner scope popped. These are the decls that will
214 be skipped when jumping to the label. */
216 /* A vector of all decls from all binding levels that would be
217 crossed by a backward branch to the label. */
218 VEC(tree
,gc
) *bad_decls
;
220 /* A list of uses of the label, before the label is defined. */
221 struct named_label_use_entry
*uses
;
223 /* The following bits are set after the label is defined, and are
224 updated as scopes are popped. They indicate that a backward jump
225 to the label will illegally enter a scope of the given flavor. */
231 #define named_labels cp_function_chain->x_named_labels
233 /* The number of function bodies which we are currently processing.
234 (Zero if we are at namespace scope, one inside the body of a
235 function, two inside the body of a function in a local class, etc.) */
238 /* To avoid unwanted recursion, finish_function defers all mark_used calls
239 encountered during its execution until it finishes. */
240 bool defer_mark_used_calls
;
241 VEC(tree
, gc
) *deferred_mark_used_calls
;
243 /* States indicating how grokdeclarator() should handle declspecs marked
244 with __attribute__((deprecated)). An object declared as
245 __attribute__((deprecated)) suppresses warnings of uses of other
247 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
250 /* A list of VAR_DECLs whose type was incomplete at the time the
251 variable was declared. */
253 typedef struct GTY(()) incomplete_var_d
{
255 tree incomplete_type
;
258 DEF_VEC_O(incomplete_var
);
259 DEF_VEC_ALLOC_O(incomplete_var
,gc
);
261 static GTY(()) VEC(incomplete_var
,gc
) *incomplete_vars
;
263 /* Returns the kind of template specialization we are currently
264 processing, given that it's declaration contained N_CLASS_SCOPES
265 explicit scope qualifications. */
268 current_tmpl_spec_kind (int n_class_scopes
)
270 int n_template_parm_scopes
= 0;
271 int seen_specialization_p
= 0;
272 int innermost_specialization_p
= 0;
275 /* Scan through the template parameter scopes. */
276 for (b
= current_binding_level
;
277 b
->kind
== sk_template_parms
;
280 /* If we see a specialization scope inside a parameter scope,
281 then something is wrong. That corresponds to a declaration
284 template <class T> template <> ...
286 which is always invalid since [temp.expl.spec] forbids the
287 specialization of a class member template if the enclosing
288 class templates are not explicitly specialized as well. */
289 if (b
->explicit_spec_p
)
291 if (n_template_parm_scopes
== 0)
292 innermost_specialization_p
= 1;
294 seen_specialization_p
= 1;
296 else if (seen_specialization_p
== 1)
297 return tsk_invalid_member_spec
;
299 ++n_template_parm_scopes
;
302 /* Handle explicit instantiations. */
303 if (processing_explicit_instantiation
)
305 if (n_template_parm_scopes
!= 0)
306 /* We've seen a template parameter list during an explicit
307 instantiation. For example:
309 template <class T> template void f(int);
311 This is erroneous. */
312 return tsk_invalid_expl_inst
;
314 return tsk_expl_inst
;
317 if (n_template_parm_scopes
< n_class_scopes
)
318 /* We've not seen enough template headers to match all the
319 specialized classes present. For example:
321 template <class T> void R<T>::S<T>::f(int);
323 This is invalid; there needs to be one set of template
324 parameters for each class. */
325 return tsk_insufficient_parms
;
326 else if (n_template_parm_scopes
== n_class_scopes
)
327 /* We're processing a non-template declaration (even though it may
328 be a member of a template class.) For example:
330 template <class T> void S<T>::f(int);
332 The `class T' matches the `S<T>', leaving no template headers
333 corresponding to the `f'. */
335 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
336 /* We've got too many template headers. For example:
338 template <> template <class T> void f (T);
340 There need to be more enclosing classes. */
341 return tsk_excessive_parms
;
343 /* This must be a template. It's of the form:
345 template <class T> template <class U> void S<T>::f(U);
347 This is a specialization if the innermost level was a
348 specialization; otherwise it's just a definition of the
350 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
353 /* Exit the current scope. */
361 /* When a label goes out of scope, check to see if that label was used
362 in a valid manner, and issue any appropriate warnings or errors. */
365 pop_label (tree label
, tree old_value
)
367 if (!processing_template_decl
)
369 if (DECL_INITIAL (label
) == NULL_TREE
)
373 error ("label %q+D used but not defined", label
);
374 location
= input_location
; /* FIXME want (input_filename, (line)0) */
375 /* Avoid crashing later. */
376 define_label (location
, DECL_NAME (label
));
379 warn_for_unused_label (label
);
382 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
385 /* At the end of a function, all labels declared within the function
386 go out of scope. BLOCK is the top-level block for the
390 pop_labels_1 (void **slot
, void *data
)
392 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
393 tree block
= (tree
) data
;
395 pop_label (ent
->label_decl
, NULL_TREE
);
397 /* Put the labels into the "variables" of the top-level block,
398 so debugger can see them. */
399 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
400 BLOCK_VARS (block
) = ent
->label_decl
;
402 htab_clear_slot (named_labels
, slot
);
408 pop_labels (tree block
)
412 htab_traverse (named_labels
, pop_labels_1
, block
);
417 /* At the end of a block with local labels, restore the outer definition. */
420 pop_local_label (tree label
, tree old_value
)
422 struct named_label_entry dummy
;
425 pop_label (label
, old_value
);
427 dummy
.label_decl
= label
;
428 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
429 htab_clear_slot (named_labels
, slot
);
432 /* The following two routines are used to interface to Objective-C++.
433 The binding level is purposely treated as an opaque type. */
436 objc_get_current_scope (void)
438 return current_binding_level
;
441 /* The following routine is used by the NeXT-style SJLJ exceptions;
442 variables get marked 'volatile' so as to not be clobbered by
443 _setjmp()/_longjmp() calls. All variables in the current scope,
444 as well as parent scopes up to (but not including) ENCLOSING_BLK
445 shall be thusly marked. */
448 objc_mark_locals_volatile (void *enclosing_blk
)
450 cp_binding_level
*scope
;
452 for (scope
= current_binding_level
;
453 scope
&& scope
!= enclosing_blk
;
454 scope
= scope
->level_chain
)
458 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
459 objc_volatilize_decl (decl
);
461 /* Do not climb up past the current function. */
462 if (scope
->kind
== sk_function_parms
)
467 /* Update data for defined and undefined labels when leaving a scope. */
470 poplevel_named_label_1 (void **slot
, void *data
)
472 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
473 cp_binding_level
*bl
= (cp_binding_level
*) data
;
474 cp_binding_level
*obl
= bl
->level_chain
;
476 if (ent
->binding_level
== bl
)
480 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
481 TREE_LISTs representing OVERLOADs, so be careful. */
482 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
484 : TREE_CHAIN (decl
)))
485 if (decl_jump_unsafe (decl
))
486 VEC_safe_push (tree
, gc
, ent
->bad_decls
, decl
);
488 ent
->binding_level
= obl
;
489 ent
->names_in_scope
= obl
->names
;
493 ent
->in_try_scope
= true;
496 ent
->in_catch_scope
= true;
499 ent
->in_omp_scope
= true;
507 struct named_label_use_entry
*use
;
509 for (use
= ent
->uses
; use
; use
= use
->next
)
510 if (use
->binding_level
== bl
)
512 use
->binding_level
= obl
;
513 use
->names_in_scope
= obl
->names
;
514 if (bl
->kind
== sk_omp
)
515 use
->in_omp_scope
= true;
522 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
523 when errors were reported, except for -Werror-unused-but-set-*. */
524 static int unused_but_set_errorcount
;
526 /* Exit a binding level.
527 Pop the level off, and restore the state of the identifier-decl mappings
528 that were in effect when this level was entered.
530 If KEEP == 1, this level had explicit declarations, so
531 and create a "block" (a BLOCK node) for the level
532 to record its declarations and subblocks for symbol table output.
534 If FUNCTIONBODY is nonzero, this level is the body of a function,
535 so create a block as if KEEP were set and also clear out all
538 If REVERSE is nonzero, reverse the order of decls before putting
539 them into the BLOCK. */
542 poplevel (int keep
, int reverse
, int functionbody
)
545 /* The chain of decls was accumulated in reverse order.
546 Put it into forward order, just for cleanliness. */
551 int leaving_for_scope
;
554 cp_label_binding
*label_bind
;
556 timevar_start (TV_NAME_LOOKUP
);
561 gcc_assert (current_binding_level
->kind
!= sk_class
);
563 if (current_binding_level
->kind
== sk_cleanup
)
565 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
567 gcc_assert (!VEC_length(cp_class_binding
,
568 current_binding_level
->class_shadowed
));
570 /* We used to use KEEP == 2 to indicate that the new block should go
571 at the beginning of the list of blocks at this binding level,
572 rather than the end. This hack is no longer used. */
573 gcc_assert (keep
== 0 || keep
== 1);
575 if (current_binding_level
->keep
)
578 /* Any uses of undefined labels, and any defined labels, now operate
579 under constraints of next binding contour. */
580 if (cfun
&& !functionbody
&& named_labels
)
581 htab_traverse (named_labels
, poplevel_named_label_1
,
582 current_binding_level
);
584 /* Get the decls in the order they were written.
585 Usually current_binding_level->names is in reverse order.
586 But parameter decls were previously put in forward order. */
589 current_binding_level
->names
590 = decls
= nreverse (current_binding_level
->names
);
592 decls
= current_binding_level
->names
;
594 /* If there were any declarations or structure tags in that level,
595 or if this level is a function body,
596 create a BLOCK to record them for the life of this function. */
598 if (keep
== 1 || functionbody
)
599 block
= make_node (BLOCK
);
600 if (block
!= NULL_TREE
)
602 BLOCK_VARS (block
) = decls
;
603 BLOCK_SUBBLOCKS (block
) = subblocks
;
606 /* In each subblock, record that this is its superior. */
608 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
609 BLOCK_SUPERCONTEXT (link
) = block
;
611 /* We still support the old for-scope rules, whereby the variables
612 in a for-init statement were in scope after the for-statement
613 ended. We only use the new rules if flag_new_for_scope is
616 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
618 /* Before we remove the declarations first check for unused variables. */
619 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
620 && !processing_template_decl
)
621 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
622 if (TREE_CODE (decl
) == VAR_DECL
623 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
624 && ! DECL_IN_SYSTEM_HEADER (decl
)
625 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
627 if (! TREE_USED (decl
))
628 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
629 else if (DECL_CONTEXT (decl
) == current_function_decl
630 && TREE_TYPE (decl
) != error_mark_node
631 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
632 && errorcount
== unused_but_set_errorcount
633 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
634 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
636 warning (OPT_Wunused_but_set_variable
,
637 "variable %q+D set but not used", decl
);
638 unused_but_set_errorcount
= errorcount
;
642 /* Remove declarations for all the DECLs in this level. */
643 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
645 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
648 tree name
= DECL_NAME (link
);
652 ob
= outer_binding (name
,
653 IDENTIFIER_BINDING (name
),
656 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
658 ns_binding
= NULL_TREE
;
660 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
661 /* We have something like:
666 and we are leaving the `for' scope. There's no reason to
667 keep the binding of the inner `i' in this case. */
668 pop_binding (name
, link
);
669 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
670 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
671 /* Here, we have something like:
679 We must pop the for-scope binding so we know what's a
680 type and what isn't. */
681 pop_binding (name
, link
);
684 /* Mark this VAR_DECL as dead so that we can tell we left it
685 there only for backward compatibility. */
686 DECL_DEAD_FOR_LOCAL (link
) = 1;
688 /* Keep track of what should have happened when we
689 popped the binding. */
692 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
693 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
696 /* Add it to the list of dead variables in the next
697 outermost binding to that we can remove these when we
698 leave that binding. */
699 VEC_safe_push (tree
, gc
,
700 current_binding_level
->level_chain
->dead_vars_from_for
,
703 /* Although we don't pop the cxx_binding, we do clear
704 its SCOPE since the scope is going away now. */
705 IDENTIFIER_BINDING (name
)->scope
706 = current_binding_level
->level_chain
;
713 /* Remove the binding. */
716 if (TREE_CODE (decl
) == TREE_LIST
)
717 decl
= TREE_VALUE (decl
);
720 if (TREE_CODE (name
) == OVERLOAD
)
721 name
= OVL_FUNCTION (name
);
723 gcc_assert (DECL_P (name
));
724 pop_binding (DECL_NAME (name
), decl
);
728 /* Remove declarations for any `for' variables from inner scopes
729 that we kept around. */
730 FOR_EACH_VEC_ELT_REVERSE (tree
, current_binding_level
->dead_vars_from_for
,
732 pop_binding (DECL_NAME (decl
), decl
);
734 /* Restore the IDENTIFIER_TYPE_VALUEs. */
735 for (link
= current_binding_level
->type_shadowed
;
736 link
; link
= TREE_CHAIN (link
))
737 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
739 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
740 FOR_EACH_VEC_ELT_REVERSE (cp_label_binding
,
741 current_binding_level
->shadowed_labels
,
743 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
745 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
746 list if a `using' declaration put them there. The debugging
747 back ends won't understand OVERLOAD, so we remove them here.
748 Because the BLOCK_VARS are (temporarily) shared with
749 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
750 popped all the bindings. */
755 for (d
= &BLOCK_VARS (block
); *d
; )
757 if (TREE_CODE (*d
) == TREE_LIST
)
758 *d
= TREE_CHAIN (*d
);
760 d
= &DECL_CHAIN (*d
);
764 /* If the level being exited is the top level of a function,
765 check over all the labels. */
768 /* Since this is the top level block of a function, the vars are
769 the function's parameters. Don't leave them in the BLOCK
770 because they are found in the FUNCTION_DECL instead. */
771 BLOCK_VARS (block
) = 0;
775 kind
= current_binding_level
->kind
;
776 if (kind
== sk_cleanup
)
780 /* If this is a temporary binding created for a cleanup, then we'll
781 have pushed a statement list level. Pop that, create a new
782 BIND_EXPR for the block, and insert it into the stream. */
783 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
784 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
791 /* The current function is being defined, so its DECL_INITIAL
792 should be error_mark_node. */
793 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
794 DECL_INITIAL (current_function_decl
) = block
;
797 current_binding_level
->blocks
798 = block_chainon (current_binding_level
->blocks
, block
);
800 /* If we did not make a block for the level just exited,
801 any blocks made for inner levels
802 (since they cannot be recorded as subblocks in that level)
803 must be carried forward so they will later become subblocks
804 of something else. */
806 current_binding_level
->blocks
807 = block_chainon (current_binding_level
->blocks
, subblocks
);
809 /* Each and every BLOCK node created here in `poplevel' is important
810 (e.g. for proper debugging information) so if we created one
811 earlier, mark it as "used". */
813 TREE_USED (block
) = 1;
815 /* All temporary bindings created for cleanups are popped silently. */
816 if (kind
== sk_cleanup
)
819 timevar_stop (TV_NAME_LOOKUP
);
823 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
824 itself, calling F for each. The DATA is passed to F as well. */
827 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
830 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
832 result
|= (*f
) (name_space
, data
);
834 for (; current
; current
= DECL_CHAIN (current
))
835 result
|= walk_namespaces_r (current
, f
, data
);
840 /* Walk all the namespaces, calling F for each. The DATA is passed to
844 walk_namespaces (walk_namespaces_fn f
, void* data
)
846 return walk_namespaces_r (global_namespace
, f
, data
);
849 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
850 DATA is non-NULL, this is the last time we will call
851 wrapup_global_declarations for this NAMESPACE. */
854 wrapup_globals_for_namespace (tree name_space
, void* data
)
856 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
857 VEC(tree
,gc
) *statics
= level
->static_decls
;
858 tree
*vec
= VEC_address (tree
, statics
);
859 int len
= VEC_length (tree
, statics
);
860 int last_time
= (data
!= 0);
864 check_global_declarations (vec
, len
);
865 emit_debug_global_declarations (vec
, len
);
869 /* Write out any globals that need to be output. */
870 return wrapup_global_declarations (vec
, len
);
874 /* In C++, you don't have to write `struct S' to refer to `S'; you
875 can just use `S'. We accomplish this by creating a TYPE_DECL as
876 if the user had written `typedef struct S S'. Create and return
877 the TYPE_DECL for TYPE. */
880 create_implicit_typedef (tree name
, tree type
)
884 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
885 DECL_ARTIFICIAL (decl
) = 1;
886 /* There are other implicit type declarations, like the one *within*
887 a class that allows you to write `S::S'. We must distinguish
889 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
890 TYPE_NAME (type
) = decl
;
891 TYPE_STUB_DECL (type
) = decl
;
896 /* Remember a local name for name-mangling purposes. */
899 push_local_name (tree decl
)
904 timevar_start (TV_NAME_LOOKUP
);
906 name
= DECL_NAME (decl
);
908 nelts
= VEC_length (tree
, local_names
);
909 for (i
= 0; i
< nelts
; i
++)
911 t
= VEC_index (tree
, local_names
, i
);
912 if (DECL_NAME (t
) == name
)
914 if (!DECL_LANG_SPECIFIC (decl
))
915 retrofit_lang_decl (decl
);
916 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
917 if (DECL_LANG_SPECIFIC (t
))
918 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
920 DECL_DISCRIMINATOR (decl
) = 1;
922 VEC_replace (tree
, local_names
, i
, decl
);
923 timevar_stop (TV_NAME_LOOKUP
);
928 VEC_safe_push (tree
, gc
, local_names
, decl
);
929 timevar_stop (TV_NAME_LOOKUP
);
932 /* Subroutine of duplicate_decls: return truthvalue of whether
933 or not types of these decls match.
935 For C++, we must compare the parameter list so that `int' can match
936 `int&' in a parameter position, but `int&' is not confused with
940 decls_match (tree newdecl
, tree olddecl
)
944 if (newdecl
== olddecl
)
947 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
948 /* If the two DECLs are not even the same kind of thing, we're not
949 interested in their types. */
952 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
954 tree f1
= TREE_TYPE (newdecl
);
955 tree f2
= TREE_TYPE (olddecl
);
956 tree p1
= TYPE_ARG_TYPES (f1
);
957 tree p2
= TYPE_ARG_TYPES (f2
);
959 /* Specializations of different templates are different functions
960 even if they have the same type. */
961 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
962 ? DECL_TI_TEMPLATE (newdecl
)
964 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
965 ? DECL_TI_TEMPLATE (olddecl
)
970 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
971 && ! (DECL_EXTERN_C_P (newdecl
)
972 && DECL_EXTERN_C_P (olddecl
)))
975 #ifdef NO_IMPLICIT_EXTERN_C
976 /* A new declaration doesn't match a built-in one unless it
977 is also extern "C". */
978 if (DECL_IS_BUILTIN (olddecl
)
979 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
983 if (TREE_CODE (f1
) != TREE_CODE (f2
))
986 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
988 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
989 && (DECL_BUILT_IN (olddecl
)
990 #ifndef NO_IMPLICIT_EXTERN_C
991 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
992 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
996 types_match
= self_promoting_args_p (p1
);
997 if (p1
== void_list_node
)
998 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1000 #ifndef NO_IMPLICIT_EXTERN_C
1001 else if (!prototype_p (f1
)
1002 && (DECL_EXTERN_C_P (olddecl
)
1003 && DECL_IN_SYSTEM_HEADER (olddecl
)
1004 && !DECL_CLASS_SCOPE_P (olddecl
))
1005 && (DECL_EXTERN_C_P (newdecl
)
1006 && DECL_IN_SYSTEM_HEADER (newdecl
)
1007 && !DECL_CLASS_SCOPE_P (newdecl
)))
1009 types_match
= self_promoting_args_p (p2
);
1010 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1016 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1017 || comp_type_attributes (TREE_TYPE (newdecl
),
1018 TREE_TYPE (olddecl
)) != 0);
1023 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1025 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1026 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1029 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1030 DECL_TEMPLATE_PARMS (olddecl
)))
1033 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1034 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1035 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1037 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1038 DECL_TEMPLATE_RESULT (newdecl
));
1042 /* Need to check scope for variable declaration (VAR_DECL).
1043 For typedef (TYPE_DECL), scope is ignored. */
1044 if (TREE_CODE (newdecl
) == VAR_DECL
1045 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1047 Two declarations for an object with C language linkage
1048 with the same name (ignoring the namespace that qualify
1049 it) that appear in different namespace scopes refer to
1051 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1054 if (TREE_TYPE (newdecl
) == error_mark_node
)
1055 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1056 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1057 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1058 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1061 types_match
= comptypes (TREE_TYPE (newdecl
),
1062 TREE_TYPE (olddecl
),
1063 COMPARE_REDECLARATION
);
1069 /* If NEWDECL is `static' and an `extern' was seen previously,
1070 warn about it. OLDDECL is the previous declaration.
1072 Note that this does not apply to the C++ case of declaring
1073 a variable `extern const' and then later `const'.
1075 Don't complain about built-in functions, since they are beyond
1076 the user's control. */
1079 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1081 if (TREE_CODE (newdecl
) == TYPE_DECL
1082 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1083 || TREE_CODE (newdecl
) == CONST_DECL
1084 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1087 /* Don't get confused by static member functions; that's a different
1089 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1090 && DECL_STATIC_FUNCTION_P (newdecl
))
1093 /* If the old declaration was `static', or the new one isn't, then
1094 everything is OK. */
1095 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1098 /* It's OK to declare a builtin function as `static'. */
1099 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1100 && DECL_ARTIFICIAL (olddecl
))
1103 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1104 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1107 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1108 function templates. If their exception specifications do not
1109 match, issue a diagnostic. */
1112 check_redeclaration_exception_specification (tree new_decl
,
1117 tree new_exceptions
;
1118 tree old_exceptions
;
1120 new_type
= TREE_TYPE (new_decl
);
1121 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1122 old_type
= TREE_TYPE (old_decl
);
1123 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1127 If any declaration of a function has an exception-specification,
1128 all declarations, including the definition and an explicit
1129 specialization, of that function shall have an
1130 exception-specification with the same set of type-ids. */
1131 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1132 && ! DECL_IS_BUILTIN (old_decl
)
1134 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1136 error ("declaration of %qF has a different exception specifier",
1138 error ("from previous declaration %q+F", old_decl
);
1142 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1143 Otherwise issue diagnostics. */
1146 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1148 old_decl
= STRIP_TEMPLATE (old_decl
);
1149 new_decl
= STRIP_TEMPLATE (new_decl
);
1150 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1151 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1153 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1154 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1156 if (TREE_CODE (old_decl
) == FUNCTION_DECL
&& DECL_BUILT_IN (old_decl
))
1158 /* Hide a built-in declaration. */
1159 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1160 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1163 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1164 error ("from previous declaration %q+D", old_decl
);
1168 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1169 && lookup_attribute ("gnu_inline", \
1170 DECL_ATTRIBUTES (fn)))
1172 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1173 If the redeclaration is invalid, a diagnostic is issued, and the
1174 error_mark_node is returned. Otherwise, OLDDECL is returned.
1176 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1179 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1182 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1184 unsigned olddecl_uid
= DECL_UID (olddecl
);
1185 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1186 int new_defines_function
= 0;
1187 tree new_template_info
;
1189 if (newdecl
== olddecl
)
1192 types_match
= decls_match (newdecl
, olddecl
);
1194 /* If either the type of the new decl or the type of the old decl is an
1195 error_mark_node, then that implies that we have already issued an
1196 error (earlier) for some bogus type specification, and in that case,
1197 it is rather pointless to harass the user with yet more error message
1198 about the same declaration, so just pretend the types match here. */
1199 if (TREE_TYPE (newdecl
) == error_mark_node
1200 || TREE_TYPE (olddecl
) == error_mark_node
)
1201 return error_mark_node
;
1203 if (DECL_P (olddecl
)
1204 && TREE_CODE (newdecl
) == FUNCTION_DECL
1205 && TREE_CODE (olddecl
) == FUNCTION_DECL
1206 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1208 if (DECL_DECLARED_INLINE_P (newdecl
)
1209 && DECL_UNINLINABLE (newdecl
)
1210 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1211 /* Already warned elsewhere. */;
1212 else if (DECL_DECLARED_INLINE_P (olddecl
)
1213 && DECL_UNINLINABLE (olddecl
)
1214 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1215 /* Already warned. */;
1216 else if (DECL_DECLARED_INLINE_P (newdecl
)
1217 && DECL_UNINLINABLE (olddecl
)
1218 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1220 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1222 warning (OPT_Wattributes
, "previous declaration of %q+D "
1223 "with attribute noinline", olddecl
);
1225 else if (DECL_DECLARED_INLINE_P (olddecl
)
1226 && DECL_UNINLINABLE (newdecl
)
1227 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1229 warning (OPT_Wattributes
, "function %q+D redeclared with "
1230 "attribute noinline", newdecl
);
1231 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1236 /* Check for redeclaration and other discrepancies. */
1237 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1238 && DECL_ARTIFICIAL (olddecl
))
1240 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1241 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1243 /* Avoid warnings redeclaring built-ins which have not been
1244 explicitly declared. */
1245 if (DECL_ANTICIPATED (olddecl
))
1248 /* If you declare a built-in or predefined function name as static,
1249 the old definition is overridden, but optionally warn this was a
1250 bad choice of name. */
1251 if (! TREE_PUBLIC (newdecl
))
1253 warning (OPT_Wshadow
,
1254 DECL_BUILT_IN (olddecl
)
1255 ? G_("shadowing built-in function %q#D")
1256 : G_("shadowing library function %q#D"), olddecl
);
1257 /* Discard the old built-in function. */
1260 /* If the built-in is not ansi, then programs can override
1261 it even globally without an error. */
1262 else if (! DECL_BUILT_IN (olddecl
))
1263 warning (0, "library function %q#D redeclared as non-function %q#D",
1267 error ("declaration of %q#D", newdecl
);
1268 error ("conflicts with built-in declaration %q#D",
1273 else if (!types_match
)
1275 /* Avoid warnings redeclaring built-ins which have not been
1276 explicitly declared. */
1277 if (DECL_ANTICIPATED (olddecl
))
1279 /* Deal with fileptr_type_node. FILE type is not known
1280 at the time we create the builtins. */
1283 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1284 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1286 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1289 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1291 tree t
= TREE_VALUE (t1
);
1293 if (TREE_CODE (t
) == POINTER_TYPE
1294 && TYPE_NAME (TREE_TYPE (t
))
1295 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1296 == get_identifier ("FILE")
1297 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1299 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1301 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1302 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1303 types_match
= decls_match (newdecl
, olddecl
);
1305 return duplicate_decls (newdecl
, olddecl
,
1307 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1310 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1313 else if ((DECL_EXTERN_C_P (newdecl
)
1314 && DECL_EXTERN_C_P (olddecl
))
1315 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1316 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1318 /* A near match; override the builtin. */
1320 if (TREE_PUBLIC (newdecl
))
1322 warning (0, "new declaration %q#D", newdecl
);
1323 warning (0, "ambiguates built-in declaration %q#D",
1327 warning (OPT_Wshadow
,
1328 DECL_BUILT_IN (olddecl
)
1329 ? G_("shadowing built-in function %q#D")
1330 : G_("shadowing library function %q#D"), olddecl
);
1333 /* Discard the old built-in function. */
1336 /* Replace the old RTL to avoid problems with inlining. */
1337 COPY_DECL_RTL (newdecl
, olddecl
);
1339 /* Even if the types match, prefer the new declarations type for
1340 built-ins which have not been explicitly declared, for
1341 exception lists, etc... */
1342 else if (DECL_IS_BUILTIN (olddecl
))
1344 tree type
= TREE_TYPE (newdecl
);
1345 tree attribs
= (*targetm
.merge_type_attributes
)
1346 (TREE_TYPE (olddecl
), type
);
1348 type
= cp_build_type_attribute_variant (type
, attribs
);
1349 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1352 /* If a function is explicitly declared "throw ()", propagate that to
1353 the corresponding builtin. */
1354 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1355 && DECL_ANTICIPATED (olddecl
)
1356 && TREE_NOTHROW (newdecl
)
1357 && !TREE_NOTHROW (olddecl
)
1358 && built_in_decls
[DECL_FUNCTION_CODE (olddecl
)] != NULL_TREE
1359 && built_in_decls
[DECL_FUNCTION_CODE (olddecl
)] != olddecl
1361 TREE_NOTHROW (built_in_decls
[DECL_FUNCTION_CODE (olddecl
)]) = 1;
1363 /* Whether or not the builtin can throw exceptions has no
1364 bearing on this declarator. */
1365 TREE_NOTHROW (olddecl
) = 0;
1367 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1369 /* If a builtin function is redeclared as `static', merge
1370 the declarations, but make the original one static. */
1371 DECL_THIS_STATIC (olddecl
) = 1;
1372 TREE_PUBLIC (olddecl
) = 0;
1374 /* Make the old declaration consistent with the new one so
1375 that all remnants of the builtin-ness of this function
1376 will be banished. */
1377 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1378 COPY_DECL_RTL (newdecl
, olddecl
);
1381 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1383 /* C++ Standard, 3.3, clause 4:
1384 "[Note: a namespace name or a class template name must be unique
1385 in its declarative region (7.3.2, clause 14). ]" */
1386 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1387 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1388 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1389 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1390 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1391 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1393 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1394 && TREE_CODE (newdecl
) != TYPE_DECL
)
1395 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1396 && TREE_CODE (olddecl
) != TYPE_DECL
))
1398 /* We do nothing special here, because C++ does such nasty
1399 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1400 get shadowed, and know that if we need to find a TYPE_DECL
1401 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1402 slot of the identifier. */
1406 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1407 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1408 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1409 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1413 error ("%q#D redeclared as different kind of symbol", newdecl
);
1414 if (TREE_CODE (olddecl
) == TREE_LIST
)
1415 olddecl
= TREE_VALUE (olddecl
);
1416 error ("previous declaration of %q+#D", olddecl
);
1418 return error_mark_node
;
1420 else if (!types_match
)
1422 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1423 /* These are certainly not duplicate declarations; they're
1424 from different scopes. */
1427 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1429 /* The name of a class template may not be declared to refer to
1430 any other template, class, function, object, namespace, value,
1431 or type in the same scope. */
1432 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1433 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1435 error ("declaration of template %q#D", newdecl
);
1436 error ("conflicts with previous declaration %q+#D", olddecl
);
1438 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1439 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1440 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1441 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1442 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1443 DECL_TEMPLATE_PARMS (olddecl
))
1444 /* Template functions can be disambiguated by
1446 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1447 TREE_TYPE (TREE_TYPE (olddecl
))))
1449 error ("new declaration %q#D", newdecl
);
1450 error ("ambiguates old declaration %q+#D", olddecl
);
1454 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1456 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1458 error ("declaration of C function %q#D conflicts with",
1460 error ("previous declaration %q+#D here", olddecl
);
1463 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1464 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1466 error ("new declaration %q#D", newdecl
);
1467 error ("ambiguates old declaration %q+#D", olddecl
);
1468 return error_mark_node
;
1475 error ("conflicting declaration %q#D", newdecl
);
1476 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1477 return error_mark_node
;
1480 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1481 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1482 && (!DECL_TEMPLATE_INFO (newdecl
)
1483 || (DECL_TI_TEMPLATE (newdecl
)
1484 != DECL_TI_TEMPLATE (olddecl
))))
1485 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1486 && (!DECL_TEMPLATE_INFO (olddecl
)
1487 || (DECL_TI_TEMPLATE (olddecl
)
1488 != DECL_TI_TEMPLATE (newdecl
))))))
1489 /* It's OK to have a template specialization and a non-template
1490 with the same type, or to have specializations of two
1491 different templates with the same type. Note that if one is a
1492 specialization, and the other is an instantiation of the same
1493 template, that we do not exit at this point. That situation
1494 can occur if we instantiate a template class, and then
1495 specialize one of its methods. This situation is valid, but
1496 the declarations must be merged in the usual way. */
1498 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1499 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1500 && !DECL_USE_TEMPLATE (newdecl
))
1501 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1502 && !DECL_USE_TEMPLATE (olddecl
))))
1503 /* One of the declarations is a template instantiation, and the
1504 other is not a template at all. That's OK. */
1506 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1508 /* In [namespace.alias] we have:
1510 In a declarative region, a namespace-alias-definition can be
1511 used to redefine a namespace-alias declared in that declarative
1512 region to refer only to the namespace to which it already
1515 Therefore, if we encounter a second alias directive for the same
1516 alias, we can just ignore the second directive. */
1517 if (DECL_NAMESPACE_ALIAS (newdecl
)
1518 && (DECL_NAMESPACE_ALIAS (newdecl
)
1519 == DECL_NAMESPACE_ALIAS (olddecl
)))
1521 /* [namespace.alias]
1523 A namespace-name or namespace-alias shall not be declared as
1524 the name of any other entity in the same declarative region.
1525 A namespace-name defined at global scope shall not be
1526 declared as the name of any other entity in any global scope
1528 error ("declaration of namespace %qD conflicts with", newdecl
);
1529 error ("previous declaration of namespace %q+D here", olddecl
);
1530 return error_mark_node
;
1534 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1537 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1538 if (DECL_NAME (olddecl
) != NULL_TREE
)
1539 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1540 ? "%q+#D previously defined here"
1541 : "%q+#D previously declared here", olddecl
);
1542 return error_mark_node
;
1544 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1545 && DECL_INITIAL (olddecl
) != NULL_TREE
1546 && !prototype_p (TREE_TYPE (olddecl
))
1547 && prototype_p (TREE_TYPE (newdecl
)))
1549 /* Prototype decl follows defn w/o prototype. */
1550 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1551 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1552 "follows non-prototype definition here");
1554 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1555 || TREE_CODE (olddecl
) == VAR_DECL
)
1556 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1559 If two declarations of the same function or object
1560 specify different linkage-specifications ..., the program
1561 is ill-formed.... Except for functions with C++ linkage,
1562 a function declaration without a linkage specification
1563 shall not precede the first linkage specification for
1564 that function. A function can be declared without a
1565 linkage specification after an explicit linkage
1566 specification has been seen; the linkage explicitly
1567 specified in the earlier declaration is not affected by
1568 such a function declaration.
1570 DR 563 raises the question why the restrictions on
1571 functions should not also apply to objects. Older
1572 versions of G++ silently ignore the linkage-specification
1580 which is clearly wrong. Therefore, we now treat objects
1582 if (current_lang_depth () == 0)
1584 /* There is no explicit linkage-specification, so we use
1585 the linkage from the previous declaration. */
1586 if (!DECL_LANG_SPECIFIC (newdecl
))
1587 retrofit_lang_decl (newdecl
);
1588 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1592 error ("previous declaration of %q+#D with %qL linkage",
1593 olddecl
, DECL_LANGUAGE (olddecl
));
1594 error ("conflicts with new declaration with %qL linkage",
1595 DECL_LANGUAGE (newdecl
));
1599 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1601 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1603 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1604 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1607 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1608 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1610 for (; t1
&& t1
!= void_list_node
;
1611 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1612 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1614 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1617 permerror (input_location
, "default argument given for parameter %d of %q#D",
1619 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1623 error ("default argument given for parameter %d of %q#D",
1625 error ("after previous specification in %q+#D",
1632 /* Do not merge an implicit typedef with an explicit one. In:
1636 typedef class A A __attribute__ ((foo));
1638 the attribute should apply only to the typedef. */
1639 if (TREE_CODE (olddecl
) == TYPE_DECL
1640 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1641 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1644 /* If new decl is `static' and an `extern' was seen previously,
1646 warn_extern_redeclared_static (newdecl
, olddecl
);
1648 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1649 return error_mark_node
;
1651 /* We have committed to returning 1 at this point. */
1652 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1654 /* Now that functions must hold information normally held
1655 by field decls, there is extra work to do so that
1656 declaration information does not get destroyed during
1658 if (DECL_VINDEX (olddecl
))
1659 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1660 if (DECL_CONTEXT (olddecl
))
1661 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1662 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1663 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1664 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1665 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1666 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1667 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1668 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1669 SET_OVERLOADED_OPERATOR_CODE
1670 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1671 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1673 /* Optionally warn about more than one declaration for the same
1674 name, but don't warn about a function declaration followed by a
1676 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1677 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1678 /* Don't warn about extern decl followed by definition. */
1679 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1680 /* Don't warn about friends, let add_friend take care of it. */
1681 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
)))
1683 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1684 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1687 if (DECL_DELETED_FN (newdecl
))
1689 error ("deleted definition of %qD", newdecl
);
1690 error ("after previous declaration %q+D", olddecl
);
1692 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1695 /* Deal with C++: must preserve virtual function table size. */
1696 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1698 tree newtype
= TREE_TYPE (newdecl
);
1699 tree oldtype
= TREE_TYPE (olddecl
);
1701 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1702 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1703 CLASSTYPE_FRIEND_CLASSES (newtype
)
1704 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1706 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1709 /* Copy all the DECL_... slots specified in the new decl
1710 except for any that we copy here from the old type. */
1711 DECL_ATTRIBUTES (newdecl
)
1712 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1714 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1718 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1719 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1720 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1721 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1722 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1723 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1725 DECL_ATTRIBUTES (old_result
)
1726 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1728 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1730 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1731 && DECL_INITIAL (new_result
))
1733 if (DECL_INITIAL (old_result
))
1734 DECL_UNINLINABLE (old_result
) = 1;
1736 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1737 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1738 DECL_NOT_REALLY_EXTERN (old_result
)
1739 = DECL_NOT_REALLY_EXTERN (new_result
);
1740 DECL_INTERFACE_KNOWN (old_result
)
1741 = DECL_INTERFACE_KNOWN (new_result
);
1742 DECL_DECLARED_INLINE_P (old_result
)
1743 = DECL_DECLARED_INLINE_P (new_result
);
1744 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1745 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1750 DECL_DECLARED_INLINE_P (old_result
)
1751 |= DECL_DECLARED_INLINE_P (new_result
);
1752 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1753 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1754 check_redeclaration_exception_specification (newdecl
, olddecl
);
1758 /* If the new declaration is a definition, update the file and
1759 line information on the declaration, and also make
1760 the old declaration the same definition. */
1761 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1763 DECL_SOURCE_LOCATION (olddecl
)
1764 = DECL_SOURCE_LOCATION (old_result
)
1765 = DECL_SOURCE_LOCATION (newdecl
);
1766 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1767 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1770 DECL_ARGUMENTS (old_result
)
1771 = DECL_ARGUMENTS (new_result
);
1772 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1773 parm
= DECL_CHAIN (parm
))
1774 DECL_CONTEXT (parm
) = old_result
;
1783 /* Automatically handles default parameters. */
1784 tree oldtype
= TREE_TYPE (olddecl
);
1787 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1788 maybe_instantiate_noexcept (olddecl
);
1790 /* Merge the data types specified in the two decls. */
1791 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1793 /* If merge_types produces a non-typedef type, just use the old type. */
1794 if (TREE_CODE (newdecl
) == TYPE_DECL
1795 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1798 if (TREE_CODE (newdecl
) == VAR_DECL
)
1800 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1801 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1802 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1803 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1804 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1805 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1807 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1808 if (DECL_LANG_SPECIFIC (olddecl
)
1809 && CP_DECL_THREADPRIVATE_P (olddecl
))
1811 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1812 if (!DECL_LANG_SPECIFIC (newdecl
))
1813 retrofit_lang_decl (newdecl
);
1815 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1816 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1820 /* Do this after calling `merge_types' so that default
1821 parameters don't confuse us. */
1822 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1823 check_redeclaration_exception_specification (newdecl
, olddecl
);
1824 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1826 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1827 check_default_args (newdecl
);
1829 /* Lay the type out, unless already done. */
1830 if (! same_type_p (newtype
, oldtype
)
1831 && TREE_TYPE (newdecl
) != error_mark_node
1832 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1833 layout_type (TREE_TYPE (newdecl
));
1835 if ((TREE_CODE (newdecl
) == VAR_DECL
1836 || TREE_CODE (newdecl
) == PARM_DECL
1837 || TREE_CODE (newdecl
) == RESULT_DECL
1838 || TREE_CODE (newdecl
) == FIELD_DECL
1839 || TREE_CODE (newdecl
) == TYPE_DECL
)
1840 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1841 layout_decl (newdecl
, 0);
1843 /* Merge the type qualifiers. */
1844 if (TREE_READONLY (newdecl
))
1845 TREE_READONLY (olddecl
) = 1;
1846 if (TREE_THIS_VOLATILE (newdecl
))
1847 TREE_THIS_VOLATILE (olddecl
) = 1;
1848 if (TREE_NOTHROW (newdecl
))
1849 TREE_NOTHROW (olddecl
) = 1;
1851 /* Merge deprecatedness. */
1852 if (TREE_DEPRECATED (newdecl
))
1853 TREE_DEPRECATED (olddecl
) = 1;
1855 /* Preserve function specific target and optimization options */
1856 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1858 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1859 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1860 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1861 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1863 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1864 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1865 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1866 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1869 /* Merge the initialization information. */
1870 if (DECL_INITIAL (newdecl
) == NULL_TREE
1871 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1873 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1874 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1875 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1877 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1878 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1882 /* Merge the section attribute.
1883 We want to issue an error if the sections conflict but that must be
1884 done later in decl_attributes since we are called before attributes
1886 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1887 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1889 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1891 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1892 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1893 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1894 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1895 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1896 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1897 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1898 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1899 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1900 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1901 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1902 /* Keep the old RTL. */
1903 COPY_DECL_RTL (olddecl
, newdecl
);
1905 else if (TREE_CODE (newdecl
) == VAR_DECL
1906 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1908 /* Keep the old RTL. We cannot keep the old RTL if the old
1909 declaration was for an incomplete object and the new
1910 declaration is not since many attributes of the RTL will
1912 COPY_DECL_RTL (olddecl
, newdecl
);
1915 /* If cannot merge, then use the new type and qualifiers,
1916 and don't preserve the old rtl. */
1919 /* Clean out any memory we had of the old declaration. */
1920 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1922 TREE_VALUE (oldstatic
) = error_mark_node
;
1924 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1925 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1926 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1927 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1930 /* Merge the storage class information. */
1931 merge_weak (newdecl
, olddecl
);
1933 if (DECL_ONE_ONLY (olddecl
))
1934 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
1936 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1937 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1938 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1939 if (! DECL_EXTERNAL (olddecl
))
1940 DECL_EXTERNAL (newdecl
) = 0;
1942 new_template_info
= NULL_TREE
;
1943 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1945 bool new_redefines_gnu_inline
= false;
1947 if (new_defines_function
1948 && ((DECL_INTERFACE_KNOWN (olddecl
)
1949 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
1950 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
1951 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1952 == FUNCTION_DECL
))))
1956 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
1957 fn
= DECL_TEMPLATE_RESULT (olddecl
);
1959 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
1962 if (!new_redefines_gnu_inline
)
1964 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1965 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1966 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1968 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1969 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1970 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
1972 /* If the OLDDECL is an instantiation and/or specialization,
1973 then the NEWDECL must be too. But, it may not yet be marked
1974 as such if the caller has created NEWDECL, but has not yet
1975 figured out that it is a redeclaration. */
1976 if (!DECL_USE_TEMPLATE (newdecl
))
1977 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
1979 /* Don't really know how much of the language-specific
1980 values we should copy from old to new. */
1981 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1982 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
1983 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1984 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1986 if (LANG_DECL_HAS_MIN (newdecl
))
1988 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
1989 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
1990 if (DECL_TEMPLATE_INFO (newdecl
))
1991 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
1992 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1994 /* Only functions have these fields. */
1995 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1996 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1998 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1999 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2000 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2001 && DECL_HIDDEN_FRIEND_P (olddecl
)
2002 && newdecl_is_friend
);
2003 DECL_BEFRIENDING_CLASSES (newdecl
)
2004 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2005 DECL_BEFRIENDING_CLASSES (olddecl
));
2006 /* DECL_THUNKS is only valid for virtual functions,
2007 otherwise it is a DECL_FRIEND_CONTEXT. */
2008 if (DECL_VIRTUAL_P (newdecl
))
2009 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
2011 /* Only variables have this field. */
2012 else if (TREE_CODE (newdecl
) == VAR_DECL
2013 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2014 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2017 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2021 /* Merge parameter attributes. */
2022 tree oldarg
, newarg
;
2023 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2024 newarg
= DECL_ARGUMENTS(newdecl
);
2026 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2027 DECL_ATTRIBUTES (newarg
)
2028 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2029 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2032 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2033 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2035 /* If newdecl is not a specialization, then it is not a
2036 template-related function at all. And that means that we
2037 should have exited above, returning 0. */
2038 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2040 if (DECL_ODR_USED (olddecl
))
2041 /* From [temp.expl.spec]:
2043 If a template, a member template or the member of a class
2044 template is explicitly specialized then that
2045 specialization shall be declared before the first use of
2046 that specialization that would cause an implicit
2047 instantiation to take place, in every translation unit in
2048 which such a use occurs. */
2049 error ("explicit specialization of %qD after first use",
2052 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2054 /* Don't propagate visibility from the template to the
2055 specialization here. We'll do that in determine_visibility if
2057 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2059 /* [temp.expl.spec/14] We don't inline explicit specialization
2060 just because the primary template says so. */
2062 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2063 the always_inline attribute. */
2064 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2065 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2067 if (DECL_DECLARED_INLINE_P (newdecl
))
2068 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2070 DECL_ATTRIBUTES (newdecl
)
2071 = remove_attribute ("always_inline",
2072 DECL_ATTRIBUTES (newdecl
));
2075 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2077 /* Never inline re-defined extern inline functions.
2078 FIXME: this could be better handled by keeping both
2079 function as separate declarations. */
2080 DECL_UNINLINABLE (newdecl
) = 1;
2084 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2085 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2087 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2089 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2090 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2092 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2093 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2094 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2095 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2098 /* Preserve abstractness on cloned [cd]tors. */
2099 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2101 /* Update newdecl's parms to point at olddecl. */
2102 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2103 parm
= DECL_CHAIN (parm
))
2104 DECL_CONTEXT (parm
) = olddecl
;
2108 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2109 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2110 COPY_DECL_RTL (newdecl
, olddecl
);
2112 if (! types_match
|| new_defines_function
)
2114 /* These need to be copied so that the names are available.
2115 Note that if the types do match, we'll preserve inline
2116 info and other bits, but if not, we won't. */
2117 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2118 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2120 if (new_defines_function
)
2121 /* If defining a function declared with other language
2122 linkage, use the previously declared language linkage. */
2123 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2124 else if (types_match
)
2126 /* If redeclaring a builtin function, and not a definition,
2127 it stays built in. */
2128 if (DECL_BUILT_IN (olddecl
))
2130 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2131 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2132 /* If we're keeping the built-in definition, keep the rtl,
2133 regardless of declaration matches. */
2134 COPY_DECL_RTL (olddecl
, newdecl
);
2137 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2138 /* Don't clear out the arguments if we're just redeclaring a
2140 if (DECL_ARGUMENTS (olddecl
))
2141 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2144 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2145 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2147 /* Now preserve various other info from the definition. */
2148 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2149 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2150 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2151 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2153 /* Warn about conflicting visibility specifications. */
2154 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2155 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2156 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2158 warning_at (input_location
, OPT_Wattributes
,
2159 "%q+D: visibility attribute ignored because it", newdecl
);
2160 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2161 "conflicts with previous declaration here");
2163 /* Choose the declaration which specified visibility. */
2164 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2166 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2167 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2169 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2170 so keep this behavior. */
2171 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2173 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2174 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2176 /* Likewise for DECL_USER_ALIGN and DECL_PACKED. */
2177 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2178 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2179 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2181 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2182 with that from NEWDECL below. */
2183 if (DECL_LANG_SPECIFIC (olddecl
))
2185 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2186 != DECL_LANG_SPECIFIC (newdecl
));
2187 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2190 /* Merge the USED information. */
2191 if (TREE_USED (olddecl
))
2192 TREE_USED (newdecl
) = 1;
2193 else if (TREE_USED (newdecl
))
2194 TREE_USED (olddecl
) = 1;
2195 if (TREE_CODE (newdecl
) == VAR_DECL
)
2197 if (DECL_READ_P (olddecl
))
2198 DECL_READ_P (newdecl
) = 1;
2199 else if (DECL_READ_P (newdecl
))
2200 DECL_READ_P (olddecl
) = 1;
2202 if (DECL_PRESERVE_P (olddecl
))
2203 DECL_PRESERVE_P (newdecl
) = 1;
2204 else if (DECL_PRESERVE_P (newdecl
))
2205 DECL_PRESERVE_P (olddecl
) = 1;
2207 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2211 function_size
= sizeof (struct tree_decl_common
);
2213 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2214 (char *) newdecl
+ sizeof (struct tree_common
),
2215 function_size
- sizeof (struct tree_common
));
2217 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2218 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2219 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2220 if (new_template_info
)
2221 /* If newdecl is a template instantiation, it is possible that
2222 the following sequence of events has occurred:
2224 o A friend function was declared in a class template. The
2225 class template was instantiated.
2227 o The instantiation of the friend declaration was
2228 recorded on the instantiation list, and is newdecl.
2230 o Later, however, instantiate_class_template called pushdecl
2231 on the newdecl to perform name injection. But, pushdecl in
2232 turn called duplicate_decls when it discovered that another
2233 declaration of a global function with the same name already
2236 o Here, in duplicate_decls, we decided to clobber newdecl.
2238 If we're going to do that, we'd better make sure that
2239 olddecl, and not newdecl, is on the list of
2240 instantiations so that if we try to do the instantiation
2241 again we won't get the clobbered declaration. */
2242 reregister_specialization (newdecl
,
2248 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2249 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2250 (char *) newdecl
+ sizeof (struct tree_common
),
2251 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2252 switch (TREE_CODE (olddecl
))
2262 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2263 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2264 size
- sizeof (struct tree_decl_common
)
2265 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2269 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2270 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2271 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2272 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2276 DECL_UID (olddecl
) = olddecl_uid
;
2278 DECL_FRIEND_P (olddecl
) = 1;
2281 DECL_ANTICIPATED (olddecl
) = 1;
2282 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2285 /* NEWDECL contains the merged attribute lists.
2286 Update OLDDECL to be the same. */
2287 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2289 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2290 so that encode_section_info has a chance to look at the new decl
2291 flags and attributes. */
2292 if (DECL_RTL_SET_P (olddecl
)
2293 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2294 || (TREE_CODE (olddecl
) == VAR_DECL
2295 && TREE_STATIC (olddecl
))))
2296 make_decl_rtl (olddecl
);
2298 /* The NEWDECL will no longer be needed. Because every out-of-class
2299 declaration of a member results in a call to duplicate_decls,
2300 freeing these nodes represents in a significant savings. */
2306 /* Return zero if the declaration NEWDECL is valid
2307 when the declaration OLDDECL (assumed to be for the same name)
2308 has already been seen.
2309 Otherwise return an error message format string with a %s
2310 where the identifier should go. */
2313 redeclaration_error_message (tree newdecl
, tree olddecl
)
2315 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2317 /* Because C++ can put things into name space for free,
2318 constructs like "typedef struct foo { ... } foo"
2319 would look like an erroneous redeclaration. */
2320 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2323 return G_("redefinition of %q#D");
2325 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2327 /* If this is a pure function, its olddecl will actually be
2328 the original initialization to `0' (which we force to call
2329 abort()). Don't complain about redefinition in this case. */
2330 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2331 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2334 /* If both functions come from different namespaces, this is not
2335 a redeclaration - this is a conflict with a used function. */
2336 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2337 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2338 && ! decls_match (olddecl
, newdecl
))
2339 return G_("%qD conflicts with used function");
2341 /* We'll complain about linkage mismatches in
2342 warn_extern_redeclared_static. */
2344 /* Defining the same name twice is no good. */
2345 if (DECL_INITIAL (olddecl
) != NULL_TREE
2346 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2348 if (DECL_NAME (olddecl
) == NULL_TREE
)
2349 return G_("%q#D not declared in class");
2350 else if (!GNU_INLINE_P (olddecl
)
2351 || GNU_INLINE_P (newdecl
))
2352 return G_("redefinition of %q#D");
2355 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2357 bool olda
= GNU_INLINE_P (olddecl
);
2358 bool newa
= GNU_INLINE_P (newdecl
);
2363 return G_("%q+D redeclared inline with "
2364 "%<gnu_inline%> attribute");
2366 return G_("%q+D redeclared inline without "
2367 "%<gnu_inline%> attribute");
2373 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2377 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2379 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2380 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2381 return G_("redefinition of %q#D");
2385 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2386 || (DECL_TEMPLATE_RESULT (newdecl
)
2387 == DECL_TEMPLATE_RESULT (olddecl
)))
2390 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2391 if (DECL_TEMPLATE_INFO (nt
))
2392 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2393 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2394 if (DECL_TEMPLATE_INFO (ot
))
2395 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2396 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2397 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2398 return G_("redefinition of %q#D");
2400 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2402 bool olda
= GNU_INLINE_P (ot
);
2403 bool newa
= GNU_INLINE_P (nt
);
2408 return G_("%q+D redeclared inline with "
2409 "%<gnu_inline%> attribute");
2411 return G_("%q+D redeclared inline without "
2412 "%<gnu_inline%> attribute");
2416 /* Core issue #226 (C++0x):
2418 If a friend function template declaration specifies a
2419 default template-argument, that declaration shall be a
2420 definition and shall be the only declaration of the
2421 function template in the translation unit. */
2422 if ((cxx_dialect
!= cxx98
)
2423 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2424 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2425 /*is_primary=*/1, /*is_partial=*/0,
2426 /*is_friend_decl=*/2))
2427 return G_("redeclaration of friend %q#D "
2428 "may not have default template arguments");
2432 else if (TREE_CODE (newdecl
) == VAR_DECL
2433 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2434 && (! DECL_LANG_SPECIFIC (olddecl
)
2435 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2436 || DECL_THREAD_LOCAL_P (newdecl
)))
2438 /* Only variables can be thread-local, and all declarations must
2439 agree on this property. */
2440 if (DECL_THREAD_LOCAL_P (newdecl
))
2441 return G_("thread-local declaration of %q#D follows "
2442 "non-thread-local declaration");
2444 return G_("non-thread-local declaration of %q#D follows "
2445 "thread-local declaration");
2447 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2449 /* The objects have been declared at namespace scope. If either
2450 is a member of an anonymous union, then this is an invalid
2451 redeclaration. For example:
2457 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2458 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2459 return G_("redeclaration of %q#D");
2460 /* If at least one declaration is a reference, there is no
2461 conflict. For example:
2467 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2469 /* Reject two definitions. */
2470 return G_("redefinition of %q#D");
2474 /* Objects declared with block scope: */
2475 /* Reject two definitions, and reject a definition
2476 together with an external reference. */
2477 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2478 return G_("redeclaration of %q#D");
2483 /* Hash and equality functions for the named_label table. */
2486 named_label_entry_hash (const void *data
)
2488 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2489 return DECL_UID (ent
->label_decl
);
2493 named_label_entry_eq (const void *a
, const void *b
)
2495 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2496 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2497 return ent_a
->label_decl
== ent_b
->label_decl
;
2500 /* Create a new label, named ID. */
2503 make_label_decl (tree id
, int local_p
)
2505 struct named_label_entry
*ent
;
2509 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2511 DECL_CONTEXT (decl
) = current_function_decl
;
2512 DECL_MODE (decl
) = VOIDmode
;
2513 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2515 /* Say where one reference is to the label, for the sake of the
2516 error if it is not defined. */
2517 DECL_SOURCE_LOCATION (decl
) = input_location
;
2519 /* Record the fact that this identifier is bound to this label. */
2520 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2522 /* Create the label htab for the function on demand. */
2524 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2525 named_label_entry_eq
, NULL
);
2527 /* Record this label on the list of labels used in this function.
2528 We do this before calling make_label_decl so that we get the
2529 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2530 ent
= ggc_alloc_cleared_named_label_entry ();
2531 ent
->label_decl
= decl
;
2533 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2534 gcc_assert (*slot
== NULL
);
2540 /* Look for a label named ID in the current function. If one cannot
2541 be found, create one. (We keep track of used, but undefined,
2542 labels, and complain about them at the end of a function.) */
2545 lookup_label_1 (tree id
)
2549 /* You can't use labels at global scope. */
2550 if (current_function_decl
== NULL_TREE
)
2552 error ("label %qE referenced outside of any function", id
);
2556 /* See if we've already got this label. */
2557 decl
= IDENTIFIER_LABEL_VALUE (id
);
2558 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2561 decl
= make_label_decl (id
, /*local_p=*/0);
2565 /* Wrapper for lookup_label_1. */
2568 lookup_label (tree id
)
2571 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2572 ret
= lookup_label_1 (id
);
2573 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2577 /* Declare a local label named ID. */
2580 declare_local_label (tree id
)
2583 cp_label_binding
*bind
;
2585 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2586 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2587 bind
= VEC_safe_push (cp_label_binding
, gc
,
2588 current_binding_level
->shadowed_labels
, NULL
);
2589 bind
->prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2591 decl
= make_label_decl (id
, /*local_p=*/1);
2597 /* Returns nonzero if it is ill-formed to jump past the declaration of
2598 DECL. Returns 2 if it's also a real problem. */
2601 decl_jump_unsafe (tree decl
)
2603 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2604 with automatic storage duration is not in scope to a point where it is
2605 in scope is ill-formed unless the variable has scalar type, class type
2606 with a trivial default constructor and a trivial destructor, a
2607 cv-qualified version of one of these types, or an array of one of the
2608 preceding types and is declared without an initializer (8.5). */
2609 tree type
= TREE_TYPE (decl
);
2611 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2612 || type
== error_mark_node
)
2615 type
= strip_array_types (type
);
2617 if (type_has_nontrivial_default_init (TREE_TYPE (decl
))
2618 || DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2621 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2627 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2630 identify_goto (tree decl
, const location_t
*locus
)
2633 permerror (input_location
, "jump to label %qD", decl
);
2635 permerror (input_location
, "jump to case label");
2637 permerror (*locus
, " from here");
2640 /* Check that a single previously seen jump to a newly defined label
2641 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2642 the jump context; NAMES are the names in scope in LEVEL at the jump
2643 context; LOCUS is the source position of the jump or 0. Returns
2644 true if all is well. */
2647 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2648 bool exited_omp
, const location_t
*locus
)
2650 cp_binding_level
*b
;
2651 bool identified
= false, saw_eh
= false, saw_omp
= false;
2655 identify_goto (decl
, locus
);
2656 error (" exits OpenMP structured block");
2657 identified
= saw_omp
= true;
2660 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2662 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2664 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2665 new_decls
= DECL_CHAIN (new_decls
))
2667 int problem
= decl_jump_unsafe (new_decls
);
2673 identify_goto (decl
, locus
);
2677 error (" crosses initialization of %q+#D", new_decls
);
2679 permerror (input_location
, " enters scope of %q+#D which has "
2680 "non-trivial destructor", new_decls
);
2685 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2689 identify_goto (decl
, locus
);
2692 if (b
->kind
== sk_try
)
2693 error (" enters try block");
2695 error (" enters catch block");
2698 if (b
->kind
== sk_omp
&& !saw_omp
)
2702 identify_goto (decl
, locus
);
2705 error (" enters OpenMP structured block");
2714 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2716 check_previous_goto_1 (decl
, use
->binding_level
,
2717 use
->names_in_scope
, use
->in_omp_scope
,
2718 &use
->o_goto_locus
);
2722 check_switch_goto (cp_binding_level
* level
)
2724 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2727 /* Check that a new jump to a label DECL is OK. Called by
2728 finish_goto_stmt. */
2731 check_goto (tree decl
)
2733 struct named_label_entry
*ent
, dummy
;
2734 bool saw_catch
= false, identified
= false;
2738 /* We can't know where a computed goto is jumping.
2739 So we assume that it's OK. */
2740 if (TREE_CODE (decl
) != LABEL_DECL
)
2743 /* We didn't record any information about this label when we created it,
2744 and there's not much point since it's trivial to analyze as a return. */
2745 if (decl
== cdtor_label
)
2748 dummy
.label_decl
= decl
;
2749 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2750 gcc_assert (ent
!= NULL
);
2752 /* If the label hasn't been defined yet, defer checking. */
2753 if (! DECL_INITIAL (decl
))
2755 struct named_label_use_entry
*new_use
;
2757 /* Don't bother creating another use if the last goto had the
2758 same data, and will therefore create the same set of errors. */
2760 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2763 new_use
= ggc_alloc_named_label_use_entry ();
2764 new_use
->binding_level
= current_binding_level
;
2765 new_use
->names_in_scope
= current_binding_level
->names
;
2766 new_use
->o_goto_locus
= input_location
;
2767 new_use
->in_omp_scope
= false;
2769 new_use
->next
= ent
->uses
;
2770 ent
->uses
= new_use
;
2774 if (ent
->in_try_scope
|| ent
->in_catch_scope
2775 || ent
->in_omp_scope
|| !VEC_empty (tree
, ent
->bad_decls
))
2777 permerror (input_location
, "jump to label %q+D", decl
);
2778 permerror (input_location
, " from here");
2782 FOR_EACH_VEC_ELT (tree
, ent
->bad_decls
, ix
, bad
)
2784 int u
= decl_jump_unsafe (bad
);
2786 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2788 /* Can't skip init of __exception_info. */
2789 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2793 error (" skips initialization of %q+#D", bad
);
2795 permerror (input_location
, " enters scope of %q+#D which has "
2796 "non-trivial destructor", bad
);
2799 if (ent
->in_try_scope
)
2800 error (" enters try block");
2801 else if (ent
->in_catch_scope
&& !saw_catch
)
2802 error (" enters catch block");
2804 if (ent
->in_omp_scope
)
2805 error (" enters OpenMP structured block");
2806 else if (flag_openmp
)
2808 cp_binding_level
*b
;
2809 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2811 if (b
== ent
->binding_level
)
2813 if (b
->kind
== sk_omp
)
2817 permerror (input_location
, "jump to label %q+D", decl
);
2818 permerror (input_location
, " from here");
2821 error (" exits OpenMP structured block");
2828 /* Check that a return is ok wrt OpenMP structured blocks.
2829 Called by finish_return_stmt. Returns true if all is well. */
2832 check_omp_return (void)
2834 cp_binding_level
*b
;
2835 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2836 if (b
->kind
== sk_omp
)
2838 error ("invalid exit from OpenMP structured block");
2841 else if (b
->kind
== sk_function_parms
)
2846 /* Define a label, specifying the location in the source file.
2847 Return the LABEL_DECL node for the label. */
2850 define_label_1 (location_t location
, tree name
)
2852 struct named_label_entry
*ent
, dummy
;
2853 cp_binding_level
*p
;
2856 decl
= lookup_label (name
);
2858 dummy
.label_decl
= decl
;
2859 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2860 gcc_assert (ent
!= NULL
);
2862 /* After labels, make any new cleanups in the function go into their
2863 own new (temporary) binding contour. */
2864 for (p
= current_binding_level
;
2865 p
->kind
!= sk_function_parms
;
2867 p
->more_cleanups_ok
= 0;
2869 if (name
== get_identifier ("wchar_t"))
2870 permerror (input_location
, "label named wchar_t");
2872 if (DECL_INITIAL (decl
) != NULL_TREE
)
2874 error ("duplicate label %qD", decl
);
2875 return error_mark_node
;
2879 struct named_label_use_entry
*use
;
2881 /* Mark label as having been defined. */
2882 DECL_INITIAL (decl
) = error_mark_node
;
2883 /* Say where in the source. */
2884 DECL_SOURCE_LOCATION (decl
) = location
;
2886 ent
->binding_level
= current_binding_level
;
2887 ent
->names_in_scope
= current_binding_level
->names
;
2889 for (use
= ent
->uses
; use
; use
= use
->next
)
2890 check_previous_goto (decl
, use
);
2897 /* Wrapper for define_label_1. */
2900 define_label (location_t location
, tree name
)
2903 timevar_start (TV_NAME_LOOKUP
);
2904 ret
= define_label_1 (location
, name
);
2905 timevar_stop (TV_NAME_LOOKUP
);
2912 cp_binding_level
*level
;
2913 struct cp_switch
*next
;
2914 /* The SWITCH_STMT being built. */
2916 /* A splay-tree mapping the low element of a case range to the high
2917 element, or NULL_TREE if there is no high element. Used to
2918 determine whether or not a new case label duplicates an old case
2919 label. We need a tree, rather than simply a hash table, because
2920 of the GNU case range extension. */
2924 /* A stack of the currently active switch statements. The innermost
2925 switch statement is on the top of the stack. There is no need to
2926 mark the stack for garbage collection because it is only active
2927 during the processing of the body of a function, and we never
2928 collect at that point. */
2930 static struct cp_switch
*switch_stack
;
2932 /* Called right after a switch-statement condition is parsed.
2933 SWITCH_STMT is the switch statement being parsed. */
2936 push_switch (tree switch_stmt
)
2938 struct cp_switch
*p
= XNEW (struct cp_switch
);
2939 p
->level
= current_binding_level
;
2940 p
->next
= switch_stack
;
2941 p
->switch_stmt
= switch_stmt
;
2942 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2949 struct cp_switch
*cs
= switch_stack
;
2950 location_t switch_location
;
2952 /* Emit warnings as needed. */
2953 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
2954 if (!processing_template_decl
)
2955 c_do_switch_warnings (cs
->cases
, switch_location
,
2956 SWITCH_STMT_TYPE (cs
->switch_stmt
),
2957 SWITCH_STMT_COND (cs
->switch_stmt
));
2959 splay_tree_delete (cs
->cases
);
2960 switch_stack
= switch_stack
->next
;
2964 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
2965 condition. Note that if TYPE and VALUE are already integral we don't
2966 really do the conversion because the language-independent
2967 warning/optimization code will work better that way. */
2970 case_conversion (tree type
, tree value
)
2972 if (value
== NULL_TREE
)
2975 if (cxx_dialect
>= cxx0x
2976 && (SCOPED_ENUM_P (type
)
2977 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
2979 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
2980 type
= type_promotes_to (type
);
2981 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
2983 return cxx_constant_value (value
);
2986 /* Note that we've seen a definition of a case label, and complain if this
2987 is a bad place for one. */
2990 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
2993 cp_binding_level
*p
;
2996 if (processing_template_decl
)
3000 /* For templates, just add the case label; we'll do semantic
3001 analysis at instantiation-time. */
3002 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3003 return add_stmt (build_case_label (low_value
, high_value
, label
));
3006 /* Find the condition on which this switch statement depends. */
3007 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3008 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3009 cond
= TREE_VALUE (cond
);
3011 if (!check_switch_goto (switch_stack
->level
))
3012 return error_mark_node
;
3014 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3016 low_value
= case_conversion (type
, low_value
);
3017 high_value
= case_conversion (type
, high_value
);
3019 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3020 low_value
, high_value
);
3022 /* After labels, make any new cleanups in the function go into their
3023 own new (temporary) binding contour. */
3024 for (p
= current_binding_level
;
3025 p
->kind
!= sk_function_parms
;
3027 p
->more_cleanups_ok
= 0;
3032 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3035 typename_hash (const void* k
)
3038 const_tree
const t
= (const_tree
) k
;
3040 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3041 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3046 typedef struct typename_info
{
3054 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3055 really of type `typename_info*' */
3058 typename_compare (const void * k1
, const void * k2
)
3060 const_tree
const t1
= (const_tree
) k1
;
3061 const typename_info
*const t2
= (const typename_info
*) k2
;
3063 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3064 && TYPE_CONTEXT (t1
) == t2
->scope
3065 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3066 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3067 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3070 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3071 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3073 Returns the new TYPENAME_TYPE. */
3075 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3078 build_typename_type (tree context
, tree name
, tree fullname
,
3079 enum tag_types tag_type
)
3087 if (typename_htab
== NULL
)
3088 typename_htab
= htab_create_ggc (61, &typename_hash
,
3089 &typename_compare
, NULL
);
3091 ti
.scope
= FROB_CONTEXT (context
);
3093 ti
.template_id
= fullname
;
3094 ti
.enum_p
= tag_type
== enum_type
;
3095 ti
.class_p
= (tag_type
== class_type
3096 || tag_type
== record_type
3097 || tag_type
== union_type
);
3098 hash
= (htab_hash_pointer (ti
.scope
)
3099 ^ htab_hash_pointer (ti
.name
));
3101 /* See if we already have this type. */
3102 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3107 /* Build the TYPENAME_TYPE. */
3108 t
= cxx_make_type (TYPENAME_TYPE
);
3109 TYPE_CONTEXT (t
) = ti
.scope
;
3110 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3111 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3112 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3114 /* Build the corresponding TYPE_DECL. */
3115 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3116 TYPE_NAME (TREE_TYPE (d
)) = d
;
3117 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3118 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3119 DECL_ARTIFICIAL (d
) = 1;
3121 /* Store it in the hash table. */
3124 /* TYPENAME_TYPEs must always be compared structurally, because
3125 they may or may not resolve down to another type depending on
3126 the currently open classes. */
3127 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3133 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3134 provided to name the type. Returns an appropriate type, unless an
3135 error occurs, in which case error_mark_node is returned. If we
3136 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3137 return that, rather than the _TYPE it corresponds to, in other
3138 cases we look through the type decl. If TF_ERROR is set, complain
3139 about errors, otherwise be quiet. */
3142 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3143 tsubst_flags_t complain
)
3149 if (name
== error_mark_node
3150 || context
== NULL_TREE
3151 || context
== error_mark_node
)
3152 return error_mark_node
;
3156 if (!(TYPE_LANG_SPECIFIC (name
)
3157 && (CLASSTYPE_IS_TEMPLATE (name
)
3158 || CLASSTYPE_USE_TEMPLATE (name
))))
3159 name
= TYPE_IDENTIFIER (name
);
3161 /* Create a TEMPLATE_ID_EXPR for the type. */
3162 name
= build_nt (TEMPLATE_ID_EXPR
,
3163 CLASSTYPE_TI_TEMPLATE (name
),
3164 CLASSTYPE_TI_ARGS (name
));
3166 else if (TREE_CODE (name
) == TYPE_DECL
)
3167 name
= DECL_NAME (name
);
3171 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3173 name
= TREE_OPERAND (name
, 0);
3174 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3175 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3176 else if (TREE_CODE (name
) == OVERLOAD
)
3178 error ("%qD is not a type", name
);
3179 return error_mark_node
;
3182 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3184 error ("%qD used without template parameters", name
);
3185 return error_mark_node
;
3187 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3188 gcc_assert (TYPE_P (context
));
3190 if (!MAYBE_CLASS_TYPE_P (context
))
3192 if (complain
& tf_error
)
3193 error ("%q#T is not a class", context
);
3194 return error_mark_node
;
3197 /* When the CONTEXT is a dependent type, NAME could refer to a
3198 dependent base class of CONTEXT. But look inside it anyway
3199 if CONTEXT is a currently open scope, in case it refers to a
3200 member of the current instantiation or a non-dependent base;
3201 lookup will stop when we hit a dependent base. */
3202 if (!dependent_scope_p (context
))
3203 /* We should only set WANT_TYPE when we're a nested typename type.
3204 Then we can give better diagnostics if we find a non-type. */
3205 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3209 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3210 return build_typename_type (context
, name
, fullname
, tag_type
);
3212 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3216 if (complain
& tf_error
)
3217 error (want_template
? "no class template named %q#T in %q#T"
3218 : "no type named %q#T in %q#T", name
, context
);
3219 return error_mark_node
;
3222 /* Pull out the template from an injected-class-name (or multiple). */
3224 t
= maybe_get_template_decl_from_type_decl (t
);
3226 if (TREE_CODE (t
) == TREE_LIST
)
3228 if (complain
& tf_error
)
3230 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3231 print_candidates (t
);
3233 return error_mark_node
;
3236 if (want_template
&& !DECL_CLASS_TEMPLATE_P (t
))
3238 if (complain
& tf_error
)
3239 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3241 return error_mark_node
;
3243 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3245 if (complain
& tf_error
)
3246 error ("%<typename %T::%D%> names %q#T, which is not a type",
3248 return error_mark_node
;
3251 if (complain
& tf_error
)
3252 perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
);
3254 /* If we are currently parsing a template and if T is a typedef accessed
3255 through CONTEXT then we need to remember and check access of T at
3256 template instantiation time. */
3257 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3260 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3262 /*entering_scope=*/0,
3263 tf_warning_or_error
| tf_user
);
3265 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3271 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3272 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3273 in which case error_mark_node is returned.
3275 If PARM_LIST is non-NULL, also make sure that the template parameter
3276 list of TEMPLATE_DECL matches.
3278 If COMPLAIN zero, don't complain about any errors that occur. */
3281 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3282 tsubst_flags_t complain
)
3288 name
= TYPE_IDENTIFIER (name
);
3289 else if (DECL_P (name
))
3290 name
= DECL_NAME (name
);
3291 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3293 if (!dependent_type_p (context
)
3294 || currently_open_class (context
))
3296 tree tmpl
= NULL_TREE
;
3298 if (MAYBE_CLASS_TYPE_P (context
))
3299 tmpl
= lookup_field (context
, name
, 0, false);
3301 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3302 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3304 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
3306 if (complain
& tf_error
)
3307 error ("no class template named %q#T in %q#T", name
, context
);
3308 return error_mark_node
;
3312 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3314 if (complain
& tf_error
)
3316 error ("template parameters do not match template");
3317 error ("%q+D declared here", tmpl
);
3319 return error_mark_node
;
3322 if (complain
& tf_error
)
3323 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
);
3328 /* Build the UNBOUND_CLASS_TEMPLATE. */
3329 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3330 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3331 TREE_TYPE (t
) = NULL_TREE
;
3332 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3334 /* Build the corresponding TEMPLATE_DECL. */
3335 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3336 TYPE_NAME (TREE_TYPE (d
)) = d
;
3337 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3338 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3339 DECL_ARTIFICIAL (d
) = 1;
3340 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3347 /* Push the declarations of builtin types into the namespace.
3348 RID_INDEX is the index of the builtin type in the array
3349 RID_POINTERS. NAME is the name used when looking up the builtin
3350 type. TYPE is the _TYPE node for the builtin type. */
3353 record_builtin_type (enum rid rid_index
,
3357 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3358 tree tdecl
= NULL_TREE
;
3360 if ((int) rid_index
< (int) RID_MAX
)
3361 rname
= ridpointers
[(int) rid_index
];
3363 tname
= get_identifier (name
);
3365 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3366 eliminated. Built-in types should not be looked up name; their
3367 names are keywords that the parser can recognize. However, there
3368 is code in c-common.c that uses identifier_global_value to look
3369 up built-in types by name. */
3372 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3373 DECL_ARTIFICIAL (tdecl
) = 1;
3374 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3380 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3381 DECL_ARTIFICIAL (tdecl
) = 1;
3383 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3386 if (!TYPE_NAME (type
))
3387 TYPE_NAME (type
) = tdecl
;
3390 debug_hooks
->type_decl (tdecl
, 0);
3393 /* Record one of the standard Java types.
3394 * Declare it as having the given NAME.
3395 * If SIZE > 0, it is the size of one of the integral types;
3396 * otherwise it is the negative of the size of one of the other types. */
3399 record_builtin_java_type (const char* name
, int size
)
3404 type
= build_nonstandard_integer_type (size
, 0);
3405 type
= build_distinct_type_copy (type
);
3407 else if (size
> -32)
3410 /* "__java_char" or ""__java_boolean". */
3411 type
= build_nonstandard_integer_type (-size
, 1);
3412 type
= build_distinct_type_copy (type
);
3413 /* Get the signed type cached and attached to the unsigned type,
3414 so it doesn't get garbage-collected at "random" times,
3415 causing potential codegen differences out of different UIDs
3416 and different alias set numbers. */
3417 stype
= build_nonstandard_integer_type (-size
, 0);
3418 stype
= build_distinct_type_copy (stype
);
3419 TREE_CHAIN (type
) = stype
;
3420 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3423 { /* "__java_float" or ""__java_double". */
3424 type
= make_node (REAL_TYPE
);
3425 TYPE_PRECISION (type
) = - size
;
3428 record_builtin_type (RID_MAX
, name
, type
);
3429 decl
= TYPE_NAME (type
);
3431 /* Suppress generate debug symbol entries for these types,
3432 since for normal C++ they are just clutter.
3433 However, push_lang_context undoes this if extern "Java" is seen. */
3434 DECL_IGNORED_P (decl
) = 1;
3436 TYPE_FOR_JAVA (type
) = 1;
3440 /* Push a type into the namespace so that the back ends ignore it. */
3443 record_unknown_type (tree type
, const char* name
)
3445 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3446 TYPE_DECL
, get_identifier (name
), type
));
3447 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3448 DECL_IGNORED_P (decl
) = 1;
3449 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3450 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3451 TYPE_ALIGN (type
) = 1;
3452 TYPE_USER_ALIGN (type
) = 0;
3453 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3456 /* A string for which we should create an IDENTIFIER_NODE at
3459 typedef struct predefined_identifier
3461 /* The name of the identifier. */
3462 const char *const name
;
3463 /* The place where the IDENTIFIER_NODE should be stored. */
3465 /* Nonzero if this is the name of a constructor or destructor. */
3466 const int ctor_or_dtor_p
;
3467 } predefined_identifier
;
3469 /* Create all the predefined identifiers. */
3472 initialize_predefined_identifiers (void)
3474 const predefined_identifier
*pid
;
3476 /* A table of identifiers to create at startup. */
3477 static const predefined_identifier predefined_identifiers
[] = {
3478 { "C++", &lang_name_cplusplus
, 0 },
3479 { "C", &lang_name_c
, 0 },
3480 { "Java", &lang_name_java
, 0 },
3481 /* Some of these names have a trailing space so that it is
3482 impossible for them to conflict with names written by users. */
3483 { "__ct ", &ctor_identifier
, 1 },
3484 { "__base_ctor ", &base_ctor_identifier
, 1 },
3485 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3486 { "__dt ", &dtor_identifier
, 1 },
3487 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3488 { "__base_dtor ", &base_dtor_identifier
, 1 },
3489 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3490 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3491 { "nelts", &nelts_identifier
, 0 },
3492 { THIS_NAME
, &this_identifier
, 0 },
3493 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3494 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3495 { "_vptr", &vptr_identifier
, 0 },
3496 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3497 { "::", &global_scope_name
, 0 },
3498 { "std", &std_identifier
, 0 },
3502 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3504 *pid
->node
= get_identifier (pid
->name
);
3505 if (pid
->ctor_or_dtor_p
)
3506 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3510 /* Create the predefined scalar types of C,
3511 and some nodes representing standard constants (0, 1, (void *)0).
3512 Initialize the global binding level.
3513 Make definitions for built-in primitive functions. */
3516 cxx_init_decl_processing (void)
3519 tree void_ftype_ptr
;
3521 /* Create all the identifiers we need. */
3522 initialize_predefined_identifiers ();
3524 /* Create the global variables. */
3525 push_to_top_level ();
3527 current_function_decl
= NULL_TREE
;
3528 current_binding_level
= NULL
;
3529 /* Enter the global namespace. */
3530 gcc_assert (global_namespace
== NULL_TREE
);
3531 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3533 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3534 TREE_PUBLIC (global_namespace
) = 1;
3535 begin_scope (sk_namespace
, global_namespace
);
3537 if (flag_visibility_ms_compat
)
3538 default_visibility
= VISIBILITY_HIDDEN
;
3541 current_lang_name
= lang_name_c
;
3543 /* Create the `std' namespace. */
3544 push_namespace (std_identifier
);
3545 std_node
= current_namespace
;
3548 c_common_nodes_and_builtins ();
3550 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3551 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3552 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3553 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3554 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3555 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3556 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3557 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3559 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3561 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3562 truthvalue_type_node
= boolean_type_node
;
3563 truthvalue_false_node
= boolean_false_node
;
3564 truthvalue_true_node
= boolean_true_node
;
3566 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3567 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3568 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3571 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3574 delta_type_node
= ptrdiff_type_node
;
3575 vtable_index_type
= ptrdiff_type_node
;
3577 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3578 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3579 void_ftype_ptr
= build_function_type_list (void_type_node
,
3580 ptr_type_node
, NULL_TREE
);
3582 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3584 /* C++ extensions */
3586 unknown_type_node
= make_node (LANG_TYPE
);
3587 record_unknown_type (unknown_type_node
, "unknown type");
3589 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3590 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3592 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3594 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3595 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3597 init_list_type_node
= make_node (LANG_TYPE
);
3598 record_unknown_type (init_list_type_node
, "init list");
3601 /* Make sure we get a unique function type, so we can give
3602 its pointer type a name. (This wins for gdb.) */
3603 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3604 TREE_TYPE (vfunc_type
) = integer_type_node
;
3605 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3606 layout_type (vfunc_type
);
3608 vtable_entry_type
= build_pointer_type (vfunc_type
);
3610 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3613 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3614 layout_type (vtbl_type_node
);
3615 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3616 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3617 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3618 layout_type (vtbl_ptr_type_node
);
3619 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3621 push_namespace (get_identifier ("__cxxabiv1"));
3622 abi_node
= current_namespace
;
3625 global_type_node
= make_node (LANG_TYPE
);
3626 record_unknown_type (global_type_node
, "global type");
3629 current_lang_name
= lang_name_cplusplus
;
3632 tree newtype
, deltype
;
3633 tree ptr_ftype_sizetype
;
3637 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3638 if (cxx_dialect
== cxx98
)
3641 tree bad_alloc_type_node
;
3642 tree bad_alloc_decl
;
3644 push_namespace (std_identifier
);
3645 bad_alloc_id
= get_identifier ("bad_alloc");
3646 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3647 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3649 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3650 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3654 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3657 new_eh_spec
= noexcept_false_spec
;
3659 newtype
= build_exception_variant (ptr_ftype_sizetype
, new_eh_spec
);
3660 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3661 push_cp_library_fn (NEW_EXPR
, newtype
);
3662 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3663 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3664 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3666 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3667 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3668 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3669 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3670 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3671 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3672 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3673 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3677 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3679 /* Perform other language dependent initializations. */
3680 init_class_processing ();
3681 init_rtti_processing ();
3682 init_template_processing ();
3684 if (flag_exceptions
)
3685 init_exception_processing ();
3687 if (! supports_one_only ())
3690 make_fname_decl
= cp_make_fname_decl
;
3691 start_fname_decls ();
3693 /* Show we use EH for cleanups. */
3694 if (flag_exceptions
)
3695 using_eh_for_cleanups ();
3698 /* Generate an initializer for a function naming variable from
3699 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3700 filled in with the type of the init. */
3703 cp_fname_init (const char* name
, tree
*type_p
)
3705 tree domain
= NULL_TREE
;
3707 tree init
= NULL_TREE
;
3712 length
= strlen (name
);
3713 domain
= build_index_type (size_int (length
));
3714 init
= build_string (length
+ 1, name
);
3717 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3718 type
= build_cplus_array_type (type
, domain
);
3723 TREE_TYPE (init
) = type
;
3725 init
= error_mark_node
;
3730 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3731 the decl, LOC is the location to give the decl, NAME is the
3732 initialization string and TYPE_DEP indicates whether NAME depended
3733 on the type of the function. We make use of that to detect
3734 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3735 at the point of first use, so we mustn't push the decl now. */
3738 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3740 const char *const name
= (type_dep
&& processing_template_decl
3741 ? NULL
: fname_as_string (type_dep
));
3743 tree init
= cp_fname_init (name
, &type
);
3744 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3747 free (CONST_CAST (char *, name
));
3749 /* As we're using pushdecl_with_scope, we must set the context. */
3750 DECL_CONTEXT (decl
) = current_function_decl
;
3751 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3753 TREE_STATIC (decl
) = 1;
3754 TREE_READONLY (decl
) = 1;
3755 DECL_ARTIFICIAL (decl
) = 1;
3757 TREE_USED (decl
) = 1;
3759 if (current_function_decl
)
3761 cp_binding_level
*b
= current_binding_level
;
3762 if (b
->kind
== sk_function_parms
)
3763 return error_mark_node
;
3764 while (b
->level_chain
->kind
!= sk_function_parms
)
3766 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3767 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3768 LOOKUP_ONLYCONVERTING
);
3772 DECL_THIS_STATIC (decl
) = true;
3773 pushdecl_top_level_and_finish (decl
, init
);
3780 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3782 tree id
= DECL_NAME (decl
);
3783 const char *name
= IDENTIFIER_POINTER (id
);
3785 retrofit_lang_decl (decl
);
3787 DECL_ARTIFICIAL (decl
) = 1;
3788 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3789 SET_DECL_LANGUAGE (decl
, lang_c
);
3790 /* Runtime library routines are, by definition, available in an
3791 external shared object. */
3792 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3793 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3795 DECL_CONTEXT (decl
) = context
;
3798 pushdecl_top_level (decl
);
3802 /* A function in the user's namespace should have an explicit
3803 declaration before it is used. Mark the built-in function as
3804 anticipated but not actually declared. */
3805 if (name
[0] != '_' || name
[1] != '_')
3806 DECL_ANTICIPATED (decl
) = 1;
3807 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3809 size_t len
= strlen (name
);
3811 /* Treat __*_chk fortification functions as anticipated as well,
3812 unless they are __builtin_*. */
3813 if (len
> strlen ("___chk")
3814 && memcmp (name
+ len
- strlen ("_chk"),
3815 "_chk", strlen ("_chk") + 1) == 0)
3816 DECL_ANTICIPATED (decl
) = 1;
3823 cxx_builtin_function (tree decl
)
3825 tree id
= DECL_NAME (decl
);
3826 const char *name
= IDENTIFIER_POINTER (id
);
3827 /* All builtins that don't begin with an '_' should additionally
3828 go in the 'std' namespace. */
3831 tree decl2
= copy_node(decl
);
3832 push_namespace (std_identifier
);
3833 builtin_function_1 (decl2
, std_node
, false);
3837 return builtin_function_1 (decl
, NULL_TREE
, false);
3840 /* Like cxx_builtin_function, but guarantee the function is added to the global
3841 scope. This is to allow function specific options to add new machine
3842 dependent builtins when the target ISA changes via attribute((target(...)))
3843 which saves space on program startup if the program does not use non-generic
3847 cxx_builtin_function_ext_scope (tree decl
)
3850 tree id
= DECL_NAME (decl
);
3851 const char *name
= IDENTIFIER_POINTER (id
);
3852 /* All builtins that don't begin with an '_' should additionally
3853 go in the 'std' namespace. */
3856 tree decl2
= copy_node(decl
);
3857 push_namespace (std_identifier
);
3858 builtin_function_1 (decl2
, std_node
, true);
3862 return builtin_function_1 (decl
, NULL_TREE
, true);
3865 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3866 function. Not called directly. */
3869 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3871 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3872 DECL_EXTERNAL (fn
) = 1;
3873 TREE_PUBLIC (fn
) = 1;
3874 DECL_ARTIFICIAL (fn
) = 1;
3875 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3876 SET_DECL_LANGUAGE (fn
, lang_c
);
3877 /* Runtime library routines are, by definition, available in an
3878 external shared object. */
3879 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3880 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3884 /* Returns the _DECL for a library function with C linkage.
3885 We assume that such functions never throw; if this is incorrect,
3886 callers should unset TREE_NOTHROW. */
3889 build_library_fn (tree name
, tree type
)
3891 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
3892 TREE_NOTHROW (fn
) = 1;
3896 /* Returns the _DECL for a library function with C++ linkage. */
3899 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3901 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3902 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3903 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3904 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3908 /* Like build_library_fn, but takes a C string instead of an
3912 build_library_fn_ptr (const char* name
, tree type
)
3914 return build_library_fn (get_identifier (name
), type
);
3917 /* Like build_cp_library_fn, but takes a C string instead of an
3921 build_cp_library_fn_ptr (const char* name
, tree type
)
3923 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3926 /* Like build_library_fn, but also pushes the function so that we will
3927 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3928 may throw exceptions listed in RAISES. */
3931 push_library_fn (tree name
, tree type
, tree raises
)
3936 type
= build_exception_variant (type
, raises
);
3938 fn
= build_library_fn (name
, type
);
3939 pushdecl_top_level (fn
);
3943 /* Like build_cp_library_fn, but also pushes the function so that it
3944 will be found by normal lookup. */
3947 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3949 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3956 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3960 push_void_library_fn (tree name
, tree parmtypes
)
3962 tree type
= build_function_type (void_type_node
, parmtypes
);
3963 return push_library_fn (name
, type
, NULL_TREE
);
3966 /* Like push_library_fn, but also note that this function throws
3967 and does not return. Used for __throw_foo and the like. */
3970 push_throw_library_fn (tree name
, tree type
)
3972 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
3973 TREE_THIS_VOLATILE (fn
) = 1;
3974 TREE_NOTHROW (fn
) = 0;
3978 /* When we call finish_struct for an anonymous union, we create
3979 default copy constructors and such. But, an anonymous union
3980 shouldn't have such things; this function undoes the damage to the
3981 anonymous union type T.
3983 (The reason that we create the synthesized methods is that we don't
3984 distinguish `union { int i; }' from `typedef union { int i; } U'.
3985 The first is an anonymous union; the second is just an ordinary
3989 fixup_anonymous_aggr (tree t
)
3993 /* Wipe out memory of synthesized methods. */
3994 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
3995 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3996 TYPE_HAS_COPY_CTOR (t
) = 0;
3997 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
3998 TYPE_HAS_COPY_ASSIGN (t
) = 0;
3999 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4001 /* Splice the implicitly generated functions out of the TYPE_METHODS
4003 q
= &TYPE_METHODS (t
);
4006 if (DECL_ARTIFICIAL (*q
))
4007 *q
= TREE_CHAIN (*q
);
4009 q
= &DECL_CHAIN (*q
);
4012 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4013 if (TYPE_METHODS (t
))
4015 tree decl
= TYPE_MAIN_DECL (t
);
4017 if (TREE_CODE (t
) != UNION_TYPE
)
4018 error_at (DECL_SOURCE_LOCATION (decl
),
4019 "an anonymous struct cannot have function members");
4021 error_at (DECL_SOURCE_LOCATION (decl
),
4022 "an anonymous union cannot have function members");
4025 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4026 assignment operators (because they cannot have these methods themselves).
4027 For anonymous unions this is already checked because they are not allowed
4028 in any union, otherwise we have to check it. */
4029 if (TREE_CODE (t
) != UNION_TYPE
)
4033 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4034 if (TREE_CODE (field
) == FIELD_DECL
)
4036 type
= TREE_TYPE (field
);
4037 if (CLASS_TYPE_P (type
))
4039 if (TYPE_NEEDS_CONSTRUCTING (type
))
4040 error ("member %q+#D with constructor not allowed "
4041 "in anonymous aggregate", field
);
4042 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4043 error ("member %q+#D with destructor not allowed "
4044 "in anonymous aggregate", field
);
4045 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4046 error ("member %q+#D with copy assignment operator "
4047 "not allowed in anonymous aggregate", field
);
4053 /* Make sure that a declaration with no declarator is well-formed, i.e.
4054 just declares a tagged type or anonymous union.
4056 Returns the type declared; or NULL_TREE if none. */
4059 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
4061 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
4062 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
4063 /* If a class, struct, or enum type is declared by the DECLSPECS
4064 (i.e, if a class-specifier, enum-specifier, or non-typename
4065 elaborated-type-specifier appears in the DECLSPECS),
4066 DECLARED_TYPE is set to the corresponding type. */
4067 tree declared_type
= NULL_TREE
;
4068 bool error_p
= false;
4070 if (declspecs
->multiple_types_p
)
4071 error ("multiple types in one declaration");
4072 else if (declspecs
->redefined_builtin_type
)
4074 if (!in_system_header
)
4075 permerror (input_location
, "redeclaration of C++ built-in type %qT",
4076 declspecs
->redefined_builtin_type
);
4081 && TYPE_P (declspecs
->type
)
4082 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4083 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4084 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4085 declared_type
= declspecs
->type
;
4086 else if (declspecs
->type
== error_mark_node
)
4088 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4089 permerror (input_location
, "declaration does not declare anything");
4090 /* Check for an anonymous union. */
4091 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4092 && TYPE_ANONYMOUS_P (declared_type
))
4094 /* 7/3 In a simple-declaration, the optional init-declarator-list
4095 can be omitted only when declaring a class (clause 9) or
4096 enumeration (7.2), that is, when the decl-specifier-seq contains
4097 either a class-specifier, an elaborated-type-specifier with
4098 a class-key (9.1), or an enum-specifier. In these cases and
4099 whenever a class-specifier or enum-specifier is present in the
4100 decl-specifier-seq, the identifiers in these specifiers are among
4101 the names being declared by the declaration (as class-name,
4102 enum-names, or enumerators, depending on the syntax). In such
4103 cases, and except for the declaration of an unnamed bit-field (9.6),
4104 the decl-specifier-seq shall introduce one or more names into the
4105 program, or shall redeclare a name introduced by a previous
4106 declaration. [Example:
4107 enum { }; // ill-formed
4108 typedef class { }; // ill-formed
4112 error ("missing type-name in typedef-declaration");
4115 /* Anonymous unions are objects, so they can have specifiers. */;
4116 SET_ANON_AGGR_TYPE_P (declared_type
);
4118 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4119 pedwarn (input_location
, OPT_pedantic
, "ISO C++ prohibits anonymous structs");
4124 if (declspecs
->specs
[(int)ds_inline
]
4125 || declspecs
->specs
[(int)ds_virtual
])
4126 error ("%qs can only be specified for functions",
4127 declspecs
->specs
[(int)ds_inline
]
4128 ? "inline" : "virtual");
4130 && (!current_class_type
4131 || current_scope () != current_class_type
))
4132 error ("%<friend%> can only be specified inside a class");
4133 else if (declspecs
->specs
[(int)ds_explicit
])
4134 error ("%<explicit%> can only be specified for constructors");
4135 else if (declspecs
->storage_class
)
4136 error ("a storage class can only be specified for objects "
4138 else if (declspecs
->specs
[(int)ds_const
]
4139 || declspecs
->specs
[(int)ds_volatile
]
4140 || declspecs
->specs
[(int)ds_restrict
]
4141 || declspecs
->specs
[(int)ds_thread
])
4142 error ("qualifiers can only be specified for objects "
4144 else if (saw_typedef
)
4145 warning (0, "%<typedef%> was ignored in this declaration");
4146 else if (declspecs
->specs
[(int) ds_constexpr
])
4147 error ("%<constexpr%> cannot be used for type declarations");
4150 return declared_type
;
4153 /* Called when a declaration is seen that contains no names to declare.
4154 If its type is a reference to a structure, union or enum inherited
4155 from a containing scope, shadow that tag name for the current scope
4156 with a forward reference.
4157 If its type defines a new named structure or union
4158 or defines an enum, it is valid but we need not do anything here.
4159 Otherwise, it is an error.
4161 C++: may have to grok the declspecs to learn about static,
4162 complain for anonymous unions.
4164 Returns the TYPE declared -- or NULL_TREE if none. */
4167 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4169 tree t
= check_tag_decl (declspecs
);
4174 if (declspecs
->attributes
)
4176 warning (0, "attribute ignored in declaration of %q+#T", t
);
4177 warning (0, "attribute for %q+#T must follow the %qs keyword",
4178 t
, class_key_or_enum_as_string (t
));
4182 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4185 /* This is where the variables in an anonymous union are
4186 declared. An anonymous union declaration looks like:
4188 because there is no declarator after the union, the parser
4189 sends that declaration here. */
4190 if (ANON_AGGR_TYPE_P (t
))
4192 fixup_anonymous_aggr (t
);
4194 if (TYPE_FIELDS (t
))
4196 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4197 declspecs
, NORMAL
, 0, NULL
);
4198 finish_anon_union (decl
);
4205 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4208 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4209 const cp_declarator
*declarator
,
4210 bool is_template_arg
)
4214 enum decl_context context
4215 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4216 attrs
= type_specifiers
->attributes
;
4217 type_specifiers
->attributes
= NULL_TREE
;
4218 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4219 if (attrs
&& type
!= error_mark_node
)
4221 if (CLASS_TYPE_P (type
))
4222 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4223 "outside of definition", type
);
4224 else if (MAYBE_CLASS_TYPE_P (type
))
4225 /* A template type parameter or other dependent type. */
4226 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4227 "type %qT without an associated declaration", type
);
4229 cplus_decl_attributes (&type
, attrs
, 0);
4234 /* Process a DECLARATOR for a function-scope variable declaration,
4235 namespace-scope variable declaration, or function declaration.
4236 (Function definitions go through start_function; class member
4237 declarations appearing in the body of the class go through
4238 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4239 If an error occurs, the error_mark_node is returned instead.
4241 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4242 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4243 for an explicitly defaulted function, or SD_DELETED for an explicitly
4244 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4245 implicitly initialized via a default constructor. ATTRIBUTES and
4246 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4247 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4248 set, the caller is responsible for calling pop_scope. */
4251 start_decl (const cp_declarator
*declarator
,
4252 cp_decl_specifier_seq
*declspecs
,
4255 tree prefix_attributes
,
4256 tree
*pushed_scope_p
)
4264 *pushed_scope_p
= NULL_TREE
;
4266 /* An object declared as __attribute__((deprecated)) suppresses
4267 warnings of uses of other deprecated items. */
4268 if (lookup_attribute ("deprecated", attributes
))
4269 deprecated_state
= DEPRECATED_SUPPRESS
;
4271 attributes
= chainon (attributes
, prefix_attributes
);
4273 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4276 deprecated_state
= DEPRECATED_NORMAL
;
4278 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4279 || decl
== error_mark_node
)
4280 return error_mark_node
;
4282 context
= CP_DECL_CONTEXT (decl
);
4283 if (context
!= global_namespace
)
4284 *pushed_scope_p
= push_scope (context
);
4287 /* Is it valid for this decl to have an initializer at all?
4288 If not, set INITIALIZED to zero, which will indirectly
4289 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4290 switch (TREE_CODE (decl
))
4293 error ("typedef %qD is initialized (use decltype instead)", decl
);
4294 return error_mark_node
;
4297 if (initialized
== SD_DELETED
)
4298 /* We'll handle the rest of the semantics later, but we need to
4299 set this now so it's visible to duplicate_decls. */
4300 DECL_DELETED_FN (decl
) = 1;
4309 if (! toplevel_bindings_p ()
4310 && DECL_EXTERNAL (decl
))
4311 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4313 DECL_EXTERNAL (decl
) = 0;
4314 if (toplevel_bindings_p ())
4315 TREE_STATIC (decl
) = 1;
4317 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4319 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4320 record_key_method_defined (decl
);
4322 /* If this is a typedef that names the class for linkage purposes
4323 (7.1.3p8), apply any attributes directly to the type. */
4324 if (TREE_CODE (decl
) == TYPE_DECL
4325 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4326 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4327 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4331 /* Set attributes here so if duplicate decl, will have proper attributes. */
4332 cplus_decl_attributes (&decl
, attributes
, flags
);
4334 /* Dllimported symbols cannot be defined. Static data members (which
4335 can be initialized in-class and dllimported) go through grokfield,
4336 not here, so we don't need to exclude those decls when checking for
4338 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4340 error ("definition of %q#D is marked %<dllimport%>", decl
);
4341 DECL_DLLIMPORT_P (decl
) = 0;
4344 /* If #pragma weak was used, mark the decl weak now. */
4345 maybe_apply_pragma_weak (decl
);
4347 if (TREE_CODE (decl
) == FUNCTION_DECL
4348 && DECL_DECLARED_INLINE_P (decl
)
4349 && DECL_UNINLINABLE (decl
)
4350 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4351 warning (0, "inline function %q+D given attribute noinline", decl
);
4353 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4355 if (TREE_CODE (decl
) == VAR_DECL
)
4357 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4358 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4359 error ("%q#D is not a static member of %q#T", decl
, context
);
4362 if (DECL_CONTEXT (field
) != context
)
4364 if (!same_type_p (DECL_CONTEXT (field
), context
))
4365 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4366 "to be defined as %<%T::%D%>",
4367 DECL_CONTEXT (field
), DECL_NAME (decl
),
4368 context
, DECL_NAME (decl
));
4369 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4371 if (processing_specialization
4372 && template_class_depth (context
) == 0
4373 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4374 error ("template header not allowed in member definition "
4375 "of explicitly specialized class");
4376 /* Static data member are tricky; an in-class initialization
4377 still doesn't provide a definition, so the in-class
4378 declaration will have DECL_EXTERNAL set, but will have an
4379 initialization. Thus, duplicate_decls won't warn
4380 about this situation, and so we check here. */
4381 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4382 error ("duplicate initialization of %qD", decl
);
4383 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4385 if (declspecs
->specs
[(int) ds_constexpr
]
4386 && !DECL_DECLARED_CONSTEXPR_P (field
))
4387 error ("%qD declared %<constexpr%> outside its class", field
);
4392 tree field
= check_classfn (context
, decl
,
4393 (processing_template_decl
4394 > template_class_depth (context
))
4395 ? current_template_parms
4397 if (field
&& field
!= error_mark_node
4398 && duplicate_decls (decl
, field
,
4399 /*newdecl_is_friend=*/false))
4403 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4404 DECL_IN_AGGR_P (decl
) = 0;
4405 /* Do not mark DECL as an explicit specialization if it was not
4406 already marked as an instantiation; a declaration should
4407 never be marked as a specialization unless we know what
4408 template is being specialized. */
4409 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4411 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4413 /* [temp.expl.spec] An explicit specialization of a static data
4414 member of a template is a definition if the declaration
4415 includes an initializer; otherwise, it is a declaration.
4417 We check for processing_specialization so this only applies
4418 to the new specialization syntax. */
4419 if (!initialized
&& processing_specialization
)
4420 DECL_EXTERNAL (decl
) = 1;
4423 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4424 /* Aliases are definitions. */
4426 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4430 was_public
= TREE_PUBLIC (decl
);
4432 /* Enter this declaration into the symbol table. */
4433 decl
= maybe_push_decl (decl
);
4435 if (processing_template_decl
)
4436 decl
= push_template_decl (decl
);
4437 if (decl
== error_mark_node
)
4438 return error_mark_node
;
4440 /* Tell the back end to use or not use .common as appropriate. If we say
4441 -fconserve-space, we want this to save .data space, at the expense of
4442 wrong semantics. If we say -fno-conserve-space, we want this to
4443 produce errors about redefs; to do this we force variables into the
4445 if (flag_conserve_space
4446 && TREE_CODE (decl
) == VAR_DECL
4447 && TREE_PUBLIC (decl
)
4448 && !DECL_THREAD_LOCAL_P (decl
)
4449 && !have_global_bss_p ())
4450 DECL_COMMON (decl
) = 1;
4452 if (TREE_CODE (decl
) == VAR_DECL
4453 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4454 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4456 /* This is a const variable with implicit 'static'. Set
4457 DECL_THIS_STATIC so we can tell it from variables that are
4458 !TREE_PUBLIC because of the anonymous namespace. */
4459 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4460 DECL_THIS_STATIC (decl
) = 1;
4463 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4464 start_decl_1 (decl
, initialized
);
4469 /* Process the declaration of a variable DECL. INITIALIZED is true
4470 iff DECL is explicitly initialized. (INITIALIZED is false if the
4471 variable is initialized via an implicitly-called constructor.)
4472 This function must be called for ordinary variables (including, for
4473 example, implicit instantiations of templates), but must not be
4474 called for template declarations. */
4477 start_decl_1 (tree decl
, bool initialized
)
4481 bool aggregate_definition_p
;
4483 gcc_assert (!processing_template_decl
);
4485 if (error_operand_p (decl
))
4488 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4490 type
= TREE_TYPE (decl
);
4491 complete_p
= COMPLETE_TYPE_P (type
);
4492 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4494 /* If an explicit initializer is present, or if this is a definition
4495 of an aggregate, then we need a complete type at this point.
4496 (Scalars are always complete types, so there is nothing to
4497 check.) This code just sets COMPLETE_P; errors (if necessary)
4498 are issued below. */
4499 if ((initialized
|| aggregate_definition_p
)
4501 && COMPLETE_TYPE_P (complete_type (type
)))
4504 /* We will not yet have set TREE_READONLY on DECL if the type
4505 was "const", but incomplete, before this point. But, now, we
4506 have a complete type, so we can try again. */
4507 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4511 /* Is it valid for this decl to have an initializer at all? */
4513 /* Don't allow initializations for incomplete types except for
4514 arrays which might be completed by the initialization. */
4516 ; /* A complete type is ok. */
4517 else if (type_uses_auto (type
))
4518 ; /* An auto type is ok. */
4519 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4521 error ("variable %q#D has initializer but incomplete type", decl
);
4522 type
= TREE_TYPE (decl
) = error_mark_node
;
4524 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4526 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4527 error ("elements of array %q#D have incomplete type", decl
);
4528 /* else we already gave an error in start_decl. */
4531 else if (aggregate_definition_p
&& !complete_p
)
4533 if (type_uses_auto (type
))
4534 error ("declaration of %q#D has no initializer", decl
);
4536 error ("aggregate %q#D has incomplete type and cannot be defined",
4538 /* Change the type so that assemble_variable will give
4539 DECL an rtl we can live with: (mem (const_int 0)). */
4540 type
= TREE_TYPE (decl
) = error_mark_node
;
4543 /* Create a new scope to hold this declaration if necessary.
4544 Whether or not a new scope is necessary cannot be determined
4545 until after the type has been completed; if the type is a
4546 specialization of a class template it is not until after
4547 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4548 will be set correctly. */
4549 maybe_push_cleanup_level (type
);
4552 /* Handle initialization of references. DECL, TYPE, and INIT have the
4553 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4554 but will be set to a new CLEANUP_STMT if a temporary is created
4555 that must be destroyed subsequently.
4557 Returns an initializer expression to use to initialize DECL, or
4558 NULL if the initialization can be performed statically.
4560 Quotes on semantics can be found in ARM 8.4.3. */
4563 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
4567 if (init
== NULL_TREE
)
4569 if ((DECL_LANG_SPECIFIC (decl
) == 0
4570 || DECL_IN_AGGR_P (decl
) == 0)
4571 && ! DECL_THIS_EXTERN (decl
))
4572 error ("%qD declared as reference but not initialized", decl
);
4576 if (TREE_CODE (init
) == TREE_LIST
)
4577 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4578 tf_warning_or_error
);
4580 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4581 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4582 /* Note: default conversion is only called in very special cases. */
4583 init
= decay_conversion (init
);
4585 /* Convert INIT to the reference type TYPE. This may involve the
4586 creation of a temporary, whose lifetime must be the same as that
4587 of the reference. If so, a DECL_EXPR for the temporary will be
4588 added just after the DECL_EXPR for DECL. That's why we don't set
4589 DECL_INITIAL for local references (instead assigning to them
4590 explicitly); we need to allow the temporary to be initialized
4592 tmp
= initialize_reference (type
, init
, decl
, cleanup
, tf_warning_or_error
);
4594 if (tmp
== error_mark_node
)
4596 else if (tmp
== NULL_TREE
)
4598 error ("cannot initialize %qT from %qT", type
, TREE_TYPE (init
));
4602 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
4605 DECL_INITIAL (decl
) = tmp
;
4610 /* Subroutine of check_initializer. We're initializing a DECL of
4611 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4612 extend the lifetime of the underlying array to match that of the decl,
4613 just like for reference initialization. CLEANUP is as for
4614 grok_reference_init. */
4617 build_init_list_var_init (tree decl
, tree type
, tree init
, tree
*array_init
,
4620 tree aggr_init
, array
, arrtype
;
4621 init
= perform_implicit_conversion (type
, init
, tf_warning_or_error
);
4622 if (error_operand_p (init
))
4623 return error_mark_node
;
4625 aggr_init
= TARGET_EXPR_INITIAL (init
);
4626 array
= CONSTRUCTOR_ELT (aggr_init
, 0)->value
;
4627 arrtype
= TREE_TYPE (array
);
4629 gcc_assert (TREE_CODE (array
) == ADDR_EXPR
);
4630 array
= TREE_OPERAND (array
, 0);
4631 /* If the array is constant, finish_compound_literal already made it a
4632 static variable and we don't need to do anything here. */
4633 if (decl
&& TREE_CODE (array
) == TARGET_EXPR
)
4635 tree var
= set_up_extended_ref_temp (decl
, array
, cleanup
, array_init
);
4636 var
= build_address (var
);
4637 var
= convert (arrtype
, var
);
4638 CONSTRUCTOR_ELT (aggr_init
, 0)->value
= var
;
4643 /* Designated initializers in arrays are not supported in GNU C++.
4644 The parser cannot detect this error since it does not know whether
4645 a given brace-enclosed initializer is for a class type or for an
4646 array. This function checks that CE does not use a designated
4647 initializer. If it does, an error is issued. Returns true if CE
4648 is valid, i.e., does not have a designated initializer. */
4651 check_array_designated_initializer (const constructor_elt
*ce
,
4652 unsigned HOST_WIDE_INT index
)
4654 /* Designated initializers for array elements are not supported. */
4657 /* The parser only allows identifiers as designated
4659 if (ce
->index
== error_mark_node
)
4660 error ("name used in a GNU-style designated "
4661 "initializer for an array");
4662 else if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4664 /* A C99 designator is OK if it matches the current index. */
4665 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4668 sorry ("non-trivial designated initializers not supported");
4672 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4673 error ("name %qD used in a GNU-style designated "
4674 "initializer for an array", ce
->index
);
4682 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4683 array until we finish parsing the initializer. If that's the
4684 situation we're in, update DECL accordingly. */
4687 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4689 tree type
= TREE_TYPE (decl
);
4691 if (TREE_CODE (type
) == ARRAY_TYPE
4692 && TYPE_DOMAIN (type
) == NULL_TREE
4693 && TREE_CODE (decl
) != TYPE_DECL
)
4695 /* do_default is really a C-ism to deal with tentative definitions.
4696 But let's leave it here to ease the eventual merge. */
4697 int do_default
= !DECL_EXTERNAL (decl
);
4698 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4701 /* Check that there are no designated initializers in INIT, as
4702 those are not supported in GNU C++, and as the middle-end
4703 will crash if presented with a non-numeric designated
4705 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4707 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4708 constructor_elt
*ce
;
4710 FOR_EACH_VEC_ELT (constructor_elt
, v
, i
, ce
)
4711 if (!check_array_designated_initializer (ce
, i
))
4717 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4721 error ("initializer fails to determine size of %qD", decl
);
4722 TREE_TYPE (decl
) = error_mark_node
;
4724 else if (failure
== 2)
4728 error ("array size missing in %qD", decl
);
4729 TREE_TYPE (decl
) = error_mark_node
;
4731 /* If a `static' var's size isn't known, make it extern as
4732 well as static, so it does not get allocated. If it's not
4733 `static', then don't mark it extern; finish_incomplete_decl
4734 will give it a default size and it will get allocated. */
4735 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4736 DECL_EXTERNAL (decl
) = 1;
4738 else if (failure
== 3)
4740 error ("zero-size array %qD", decl
);
4741 TREE_TYPE (decl
) = error_mark_node
;
4745 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4747 relayout_decl (decl
);
4751 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4752 any appropriate error messages regarding the layout. */
4755 layout_var_decl (tree decl
)
4759 type
= TREE_TYPE (decl
);
4760 if (type
== error_mark_node
)
4763 /* If we haven't already layed out this declaration, do so now.
4764 Note that we must not call complete type for an external object
4765 because it's type might involve templates that we are not
4766 supposed to instantiate yet. (And it's perfectly valid to say
4767 `extern X x' for some incomplete type `X'.) */
4768 if (!DECL_EXTERNAL (decl
))
4769 complete_type (type
);
4770 if (!DECL_SIZE (decl
)
4771 && TREE_TYPE (decl
) != error_mark_node
4772 && (COMPLETE_TYPE_P (type
)
4773 || (TREE_CODE (type
) == ARRAY_TYPE
4774 && !TYPE_DOMAIN (type
)
4775 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4776 layout_decl (decl
, 0);
4778 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4780 /* An automatic variable with an incomplete type: that is an error.
4781 Don't talk about array types here, since we took care of that
4782 message in grokdeclarator. */
4783 error ("storage size of %qD isn%'t known", decl
);
4784 TREE_TYPE (decl
) = error_mark_node
;
4787 /* Keep this code around in case we later want to control debug info
4788 based on whether a type is "used". (jason 1999-11-11) */
4790 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4791 /* Let debugger know it should output info for this type. */
4792 note_debug_info_needed (ttype
);
4794 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4795 note_debug_info_needed (DECL_CONTEXT (decl
));
4798 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4799 && DECL_SIZE (decl
) != NULL_TREE
4800 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4802 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4803 constant_expression_warning (DECL_SIZE (decl
));
4806 error ("storage size of %qD isn%'t constant", decl
);
4807 TREE_TYPE (decl
) = error_mark_node
;
4812 /* If a local static variable is declared in an inline function, or if
4813 we have a weak definition, we must endeavor to create only one
4814 instance of the variable at link-time. */
4817 maybe_commonize_var (tree decl
)
4819 /* Static data in a function with comdat linkage also has comdat
4821 if (TREE_STATIC (decl
)
4822 /* Don't mess with __FUNCTION__. */
4823 && ! DECL_ARTIFICIAL (decl
)
4824 && DECL_FUNCTION_SCOPE_P (decl
)
4825 && vague_linkage_p (DECL_CONTEXT (decl
)))
4829 /* With weak symbols, we simply make the variable COMDAT;
4830 that will cause copies in multiple translations units to
4832 comdat_linkage (decl
);
4836 if (DECL_INITIAL (decl
) == NULL_TREE
4837 || DECL_INITIAL (decl
) == error_mark_node
)
4839 /* Without weak symbols, we can use COMMON to merge
4840 uninitialized variables. */
4841 TREE_PUBLIC (decl
) = 1;
4842 DECL_COMMON (decl
) = 1;
4846 /* While for initialized variables, we must use internal
4847 linkage -- which means that multiple copies will not
4849 TREE_PUBLIC (decl
) = 0;
4850 DECL_COMMON (decl
) = 0;
4851 warning_at (input_location
, 0,
4852 "sorry: semantics of inline function static "
4853 "data %q+#D are wrong (you%'ll wind up "
4854 "with multiple copies)", decl
);
4855 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4856 " you can work around this by removing "
4861 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4862 /* Set it up again; we might have set DECL_INITIAL since the last
4864 comdat_linkage (decl
);
4867 /* Issue an error message if DECL is an uninitialized const variable. */
4870 check_for_uninitialized_const_var (tree decl
)
4872 tree type
= strip_array_types (TREE_TYPE (decl
));
4874 /* ``Unless explicitly declared extern, a const object does not have
4875 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4877 if (TREE_CODE (decl
) == VAR_DECL
4878 && TREE_CODE (type
) != REFERENCE_TYPE
4879 && CP_TYPE_CONST_P (type
)
4880 && (!TYPE_NEEDS_CONSTRUCTING (type
)
4881 || !type_has_user_provided_default_constructor (type
))
4882 && !DECL_INITIAL (decl
))
4884 permerror (DECL_SOURCE_LOCATION (decl
),
4885 "uninitialized const %qD", decl
);
4887 if (CLASS_TYPE_P (type
)
4888 && !type_has_user_provided_default_constructor (type
))
4890 tree defaulted_ctor
;
4892 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
4893 "%q#T has no user-provided default constructor", type
);
4894 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
4896 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
4897 "constructor is not user-provided because it is "
4898 "explicitly defaulted in the class body");
4903 /* Structure holding the current initializer being processed by reshape_init.
4904 CUR is a pointer to the current element being processed, END is a pointer
4905 after the last element present in the initializer. */
4906 typedef struct reshape_iterator_t
4908 constructor_elt
*cur
;
4909 constructor_elt
*end
;
4912 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
4914 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4915 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4916 initialized. If there are no more such fields, the return value
4920 next_initializable_field (tree field
)
4923 && (TREE_CODE (field
) != FIELD_DECL
4924 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4925 || DECL_ARTIFICIAL (field
)))
4926 field
= DECL_CHAIN (field
);
4931 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4932 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4933 INTEGER_CST representing the size of the array minus one (the maximum index),
4934 or NULL_TREE if the array was declared without specifying the size. D is
4935 the iterator within the constructor. */
4938 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
4939 tsubst_flags_t complain
)
4942 bool sized_array_p
= (max_index
!= NULL_TREE
);
4943 unsigned HOST_WIDE_INT max_index_cst
= 0;
4944 unsigned HOST_WIDE_INT index
;
4946 /* The initializer for an array is always a CONSTRUCTOR. */
4947 new_init
= build_constructor (init_list_type_node
, NULL
);
4951 /* Minus 1 is used for zero sized arrays. */
4952 if (integer_all_onesp (max_index
))
4955 if (host_integerp (max_index
, 1))
4956 max_index_cst
= tree_low_cst (max_index
, 1);
4957 /* sizetype is sign extended, not zero extended. */
4959 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4963 /* Loop until there are no more initializers. */
4965 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
4970 check_array_designated_initializer (d
->cur
, index
);
4971 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
4973 if (elt_init
== error_mark_node
)
4974 return error_mark_node
;
4975 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
4976 size_int (index
), elt_init
);
4977 if (!TREE_CONSTANT (elt_init
))
4978 TREE_CONSTANT (new_init
) = false;
4984 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4985 Parameters are the same of reshape_init_r. */
4988 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
4990 tree max_index
= NULL_TREE
;
4992 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
4994 if (TYPE_DOMAIN (type
))
4995 max_index
= array_type_nelts (type
);
4997 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5000 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5001 Parameters are the same of reshape_init_r. */
5004 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5006 tree max_index
= NULL_TREE
;
5008 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5010 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5012 tree value
= d
->cur
->value
;
5013 if (!same_type_p (TREE_TYPE (value
), type
))
5015 if (complain
& tf_error
)
5016 error ("invalid type %qT as initializer for a vector of type %qT",
5017 TREE_TYPE (d
->cur
->value
), type
);
5018 value
= error_mark_node
;
5024 /* For a vector, we initialize it as an array of the appropriate size. */
5025 if (TREE_CODE (type
) == VECTOR_TYPE
)
5026 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5028 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5031 /* Subroutine of reshape_init_r, processes the initializers for classes
5032 or union. Parameters are the same of reshape_init_r. */
5035 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5036 tsubst_flags_t complain
)
5041 gcc_assert (CLASS_TYPE_P (type
));
5043 /* The initializer for a class is always a CONSTRUCTOR. */
5044 new_init
= build_constructor (init_list_type_node
, NULL
);
5045 field
= next_initializable_field (TYPE_FIELDS (type
));
5051 An initializer for an aggregate member that is an
5052 empty class shall have the form of an empty
5053 initializer-list {}. */
5054 if (!first_initializer_p
)
5056 if (complain
& tf_error
)
5057 error ("initializer for %qT must be brace-enclosed", type
);
5058 return error_mark_node
;
5063 /* Loop through the initializable fields, gathering initializers. */
5064 while (d
->cur
!= d
->end
)
5068 /* Handle designated initializers, as an extension. */
5071 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5073 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5075 if (complain
& tf_error
)
5076 error ("%qT has no non-static data member named %qD", type
,
5078 return error_mark_node
;
5082 /* If we processed all the member of the class, we are done. */
5086 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5087 /*first_initializer_p=*/false, complain
);
5088 if (field_init
== error_mark_node
)
5089 return error_mark_node
;
5091 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5095 When a union is initialized with a brace-enclosed
5096 initializer, the braces shall only contain an
5097 initializer for the first member of the union. */
5098 if (TREE_CODE (type
) == UNION_TYPE
)
5101 field
= next_initializable_field (DECL_CHAIN (field
));
5107 /* Subroutine of reshape_init, which processes a single initializer (part of
5108 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5109 iterator within the CONSTRUCTOR which points to the initializer to process.
5110 FIRST_INITIALIZER_P is true if this is the first initializer of the
5111 outermost CONSTRUCTOR node. */
5114 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5115 tsubst_flags_t complain
)
5117 tree init
= d
->cur
->value
;
5119 if (error_operand_p (init
))
5120 return error_mark_node
;
5122 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5124 /* A complex type can be initialized from one or two initializers,
5125 but braces are not elided. */
5127 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5129 if (CONSTRUCTOR_NELTS (init
) > 2)
5131 if (complain
& tf_error
)
5132 error ("too many initializers for %qT", type
);
5134 return error_mark_node
;
5137 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5139 VEC(constructor_elt
, gc
) *v
= 0;
5140 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5141 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5143 init
= build_constructor (init_list_type_node
, v
);
5148 /* A non-aggregate type is always initialized with a single
5150 if (!CP_AGGREGATE_TYPE_P (type
))
5152 /* It is invalid to initialize a non-aggregate type with a
5153 brace-enclosed initializer before C++0x.
5154 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5155 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5156 a CONSTRUCTOR (with a record type). */
5157 if (TREE_CODE (init
) == CONSTRUCTOR
5158 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5160 if (SCALAR_TYPE_P (type
))
5162 if (complain
& tf_error
)
5163 error ("braces around scalar initializer for type %qT", type
);
5164 init
= error_mark_node
;
5167 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5176 All implicit type conversions (clause _conv_) are considered when
5177 initializing the aggregate member with an initializer from an
5178 initializer-list. If the initializer can initialize a member,
5179 the member is initialized. Otherwise, if the member is itself a
5180 non-empty subaggregate, brace elision is assumed and the
5181 initializer is considered for the initialization of the first
5182 member of the subaggregate. */
5183 if (TREE_CODE (init
) != CONSTRUCTOR
5184 /* But don't try this for the first initializer, since that would be
5185 looking through the outermost braces; A a2 = { a1 }; is not a
5186 valid aggregate initialization. */
5187 && !first_initializer_p
5188 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5189 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
)))
5195 /* [dcl.init.string]
5197 A char array (whether plain char, signed char, or unsigned char)
5198 can be initialized by a string-literal (optionally enclosed in
5199 braces); a wchar_t array can be initialized by a wide
5200 string-literal (optionally enclosed in braces). */
5201 if (TREE_CODE (type
) == ARRAY_TYPE
5202 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5204 tree str_init
= init
;
5206 /* Strip one level of braces if and only if they enclose a single
5207 element (as allowed by [dcl.init.string]). */
5208 if (!first_initializer_p
5209 && TREE_CODE (str_init
) == CONSTRUCTOR
5210 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
5212 str_init
= VEC_index (constructor_elt
,
5213 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
5216 /* If it's a string literal, then it's the initializer for the array
5217 as a whole. Otherwise, continue with normal initialization for
5218 array types (one value per array element). */
5219 if (TREE_CODE (str_init
) == STRING_CST
)
5226 /* The following cases are about aggregates. If we are not within a full
5227 initializer already, and there is not a CONSTRUCTOR, it means that there
5228 is a missing set of braces (that is, we are processing the case for
5229 which reshape_init exists). */
5230 if (!first_initializer_p
)
5232 if (TREE_CODE (init
) == CONSTRUCTOR
)
5234 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5235 /* There is no need to reshape pointer-to-member function
5236 initializers, as they are always constructed correctly
5237 by the front end. */
5239 else if (COMPOUND_LITERAL_P (init
))
5240 /* For a nested compound literal, there is no need to reshape since
5241 brace elision is not allowed. Even if we decided to allow it,
5242 we should add a call to reshape_init in finish_compound_literal,
5243 before calling digest_init, so changing this code would still
5244 not be necessary. */
5245 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5249 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5250 return reshape_init (type
, init
, complain
);
5254 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5258 /* Dispatch to specialized routines. */
5259 if (CLASS_TYPE_P (type
))
5260 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5261 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5262 return reshape_init_array (type
, d
, complain
);
5263 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5264 return reshape_init_vector (type
, d
, complain
);
5269 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5270 brace-enclosed aggregate initializer.
5272 INIT is the CONSTRUCTOR containing the list of initializers describing
5273 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5274 It may not presently match the shape of the TYPE; for example:
5276 struct S { int a; int b; };
5277 struct S a[] = { 1, 2, 3, 4 };
5279 Here INIT will hold a VEC of four elements, rather than a
5280 VEC of two elements, each itself a VEC of two elements. This
5281 routine transforms INIT from the former form into the latter. The
5282 revised CONSTRUCTOR node is returned. */
5285 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5287 VEC(constructor_elt
, gc
) *v
;
5291 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5293 v
= CONSTRUCTOR_ELTS (init
);
5295 /* An empty constructor does not need reshaping, and it is always a valid
5297 if (VEC_empty (constructor_elt
, v
))
5300 /* Recurse on this CONSTRUCTOR. */
5301 d
.cur
= VEC_index (constructor_elt
, v
, 0);
5302 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
5304 new_init
= reshape_init_r (type
, &d
, true, complain
);
5305 if (new_init
== error_mark_node
)
5306 return error_mark_node
;
5308 /* Make sure all the element of the constructor were used. Otherwise,
5309 issue an error about exceeding initializers. */
5312 if (complain
& tf_error
)
5313 error ("too many initializers for %qT", type
);
5315 return error_mark_node
;
5321 /* Verify array initializer. Returns true if errors have been reported. */
5324 check_array_initializer (tree decl
, tree type
, tree init
)
5326 tree element_type
= TREE_TYPE (type
);
5328 /* The array type itself need not be complete, because the
5329 initializer may tell us how many elements are in the array.
5330 But, the elements of the array must be complete. */
5331 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5334 error ("elements of array %q#D have incomplete type", decl
);
5336 error ("elements of array %q#T have incomplete type", type
);
5339 /* It is not valid to initialize a VLA. */
5341 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5342 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5345 error ("variable-sized object %qD may not be initialized", decl
);
5347 error ("variable-sized compound literal");
5353 /* Subroutine of check_initializer; args are passed down from that function.
5354 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5357 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5360 int saved_stmts_are_full_exprs_p
= 0;
5361 if (building_stmt_list_p ())
5363 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5364 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5366 init
= build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5367 if (building_stmt_list_p ())
5368 current_stmt_tree ()->stmts_are_full_exprs_p
=
5369 saved_stmts_are_full_exprs_p
;
5373 /* Verify INIT (the initializer for DECL), and record the
5374 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5375 grok_reference_init.
5377 If the return value is non-NULL, it is an expression that must be
5378 evaluated dynamically to initialize DECL. */
5381 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
5383 tree type
= TREE_TYPE (decl
);
5384 tree init_code
= NULL
;
5385 tree extra_init
= NULL_TREE
;
5388 /* Things that are going to be initialized need to have complete
5390 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5392 if (DECL_HAS_VALUE_EXPR_P (decl
))
5394 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5395 it doesn't have storage to be initialized. */
5396 gcc_assert (init
== NULL_TREE
);
5400 if (type
== error_mark_node
)
5401 /* We will have already complained. */
5404 if (TREE_CODE (type
) == ARRAY_TYPE
)
5406 if (check_array_initializer (decl
, type
, init
))
5409 else if (!COMPLETE_TYPE_P (type
))
5411 error ("%qD has incomplete type", decl
);
5412 TREE_TYPE (decl
) = error_mark_node
;
5416 /* There is no way to make a variable-sized class type in GNU C++. */
5417 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5419 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5421 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
5422 if (SCALAR_TYPE_P (type
))
5426 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5427 init
= build_zero_init (type
, NULL_TREE
, false);
5429 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5431 error ("scalar object %qD requires one element in initializer",
5433 TREE_TYPE (decl
) = error_mark_node
;
5439 if (TREE_CODE (decl
) == CONST_DECL
)
5441 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5443 DECL_INITIAL (decl
) = init
;
5445 gcc_assert (init
!= NULL_TREE
);
5448 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5450 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
5451 init
= grok_reference_init (decl
, type
, init
, cleanup
);
5452 else if (init
|| type_build_ctor_call (type
))
5455 check_for_uninitialized_const_var (decl
);
5456 /* Do not reshape constructors of vectors (they don't need to be
5458 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5460 if (is_std_init_list (type
))
5461 init
= build_init_list_var_init (decl
, type
, init
,
5462 &extra_init
, cleanup
);
5463 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5465 /* Don't reshape if the class has constructors. */
5466 if (cxx_dialect
== cxx98
)
5467 error ("in C++98 %qD must be initialized by constructor, "
5471 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5473 error ("opaque vector types cannot be initialized");
5474 init
= error_mark_node
;
5478 init
= reshape_init (type
, init
, tf_warning_or_error
);
5479 if (cxx_dialect
>= cxx0x
&& SCALAR_TYPE_P (type
))
5480 check_narrowing (type
, init
);
5484 /* If DECL has an array type without a specific bound, deduce the
5485 array size from the initializer. */
5486 maybe_deduce_size_from_array_init (decl
, init
);
5487 type
= TREE_TYPE (decl
);
5488 if (type
== error_mark_node
)
5491 if (type_build_ctor_call (type
)
5492 || (CLASS_TYPE_P (type
)
5493 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))))
5495 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5497 /* If this is a constexpr initializer, expand_default_init will
5498 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5499 case, pull the initializer back out and pass it down into
5500 store_init_value. */
5501 while (TREE_CODE (init_code
) == EXPR_STMT
5502 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5503 init_code
= TREE_OPERAND (init_code
, 0);
5504 if (TREE_CODE (init_code
) == INIT_EXPR
)
5506 init
= TREE_OPERAND (init_code
, 1);
5507 init_code
= NULL_TREE
;
5508 /* Don't call digest_init; it's unnecessary and will complain
5509 about aggregate initialization of non-aggregate classes. */
5510 flags
|= LOOKUP_ALREADY_DIGESTED
;
5512 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5514 /* Declared constexpr, but no suitable initializer; massage
5515 init appropriately so we can pass it into store_init_value
5517 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5518 init
= finish_compound_literal (type
, init
,
5519 tf_warning_or_error
);
5520 else if (CLASS_TYPE_P (type
)
5521 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5523 init
= build_functional_cast (type
, init
, tf_none
);
5524 if (init
!= error_mark_node
)
5525 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5527 init_code
= NULL_TREE
;
5533 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5535 init_code
= store_init_value (decl
, init
, flags
);
5536 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5537 && DECL_INITIAL (decl
)
5538 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5539 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5540 warning (0, "array %qD initialized by parenthesized string literal %qE",
5541 decl
, DECL_INITIAL (decl
));
5547 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5548 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5549 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5550 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5553 check_for_uninitialized_const_var (decl
);
5556 if (init
&& init
!= error_mark_node
)
5557 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5560 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5562 if (init_code
&& DECL_IN_AGGR_P (decl
))
5564 static int explained
= 0;
5566 if (cxx_dialect
< cxx0x
)
5567 error ("initializer invalid for static member with constructor");
5569 error ("non-constant in-class initialization invalid for static "
5570 "member %qD", decl
);
5573 error ("(an out of class initialization is required)");
5581 /* If DECL is not a local variable, give it RTL. */
5584 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5586 int toplev
= toplevel_bindings_p ();
5588 const char *filename
;
5590 /* Set the DECL_ASSEMBLER_NAME for the object. */
5593 /* The `register' keyword, when used together with an
5594 asm-specification, indicates that the variable should be
5595 placed in a particular register. */
5596 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5598 set_user_assembler_name (decl
, asmspec
);
5599 DECL_HARD_REGISTER (decl
) = 1;
5603 if (TREE_CODE (decl
) == FUNCTION_DECL
5604 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5605 set_builtin_user_assembler_name (decl
, asmspec
);
5606 set_user_assembler_name (decl
, asmspec
);
5610 /* Handle non-variables up front. */
5611 if (TREE_CODE (decl
) != VAR_DECL
)
5613 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5617 /* If we see a class member here, it should be a static data
5619 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5621 gcc_assert (TREE_STATIC (decl
));
5622 /* An in-class declaration of a static data member should be
5623 external; it is only a declaration, and not a definition. */
5624 if (init
== NULL_TREE
)
5625 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5628 /* We don't create any RTL for local variables. */
5629 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5632 /* We defer emission of local statics until the corresponding
5633 DECL_EXPR is expanded. */
5634 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5636 /* We try to defer namespace-scope static constants so that they are
5637 not emitted into the object file unnecessarily. */
5638 filename
= input_filename
;
5639 if (!DECL_VIRTUAL_P (decl
)
5640 && TREE_READONLY (decl
)
5641 && DECL_INITIAL (decl
) != NULL_TREE
5642 && DECL_INITIAL (decl
) != error_mark_node
5644 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5646 && !TREE_PUBLIC (decl
))
5648 /* Fool with the linkage of static consts according to #pragma
5650 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5651 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5653 TREE_PUBLIC (decl
) = 1;
5654 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5659 /* Likewise for template instantiations. */
5660 else if (DECL_LANG_SPECIFIC (decl
)
5661 && DECL_IMPLICIT_INSTANTIATION (decl
))
5664 /* If we're not deferring, go ahead and assemble the variable. */
5666 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5669 /* walk_tree helper for wrap_temporary_cleanups, below. */
5672 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5674 if (TYPE_P (*stmt_p
))
5680 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5682 tree guard
= (tree
)data
;
5683 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5685 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5686 /* Tell honor_protect_cleanup_actions to handle this as a separate
5688 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5690 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5696 /* We're initializing a local variable which has a cleanup GUARD. If there
5697 are any temporaries used in the initializer INIT of this variable, we
5698 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5699 variable will be cleaned up properly if one of them throws.
5701 Unfortunately, there's no way to express this properly in terms of
5702 nesting, as the regions for the temporaries overlap the region for the
5703 variable itself; if there are two temporaries, the variable needs to be
5704 the first thing destroyed if either of them throws. However, we only
5705 want to run the variable's cleanup if it actually got constructed. So
5706 we need to guard the temporary cleanups with the variable's cleanup if
5707 they are run on the normal path, but not if they are run on the
5708 exceptional path. We implement this by telling
5709 honor_protect_cleanup_actions to strip the variable cleanup from the
5710 exceptional path. */
5713 wrap_temporary_cleanups (tree init
, tree guard
)
5715 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5718 /* Generate code to initialize DECL (a local variable). */
5721 initialize_local_var (tree decl
, tree init
)
5723 tree type
= TREE_TYPE (decl
);
5727 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5728 || TREE_CODE (decl
) == RESULT_DECL
);
5729 gcc_assert (!TREE_STATIC (decl
));
5731 if (DECL_SIZE (decl
) == NULL_TREE
)
5733 /* If we used it already as memory, it must stay in memory. */
5734 DECL_INITIAL (decl
) = NULL_TREE
;
5735 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5739 if (type
== error_mark_node
)
5742 /* Compute and store the initial value. */
5743 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5744 if (TREE_USED (type
))
5745 DECL_READ_P (decl
) = 1;
5747 /* Generate a cleanup, if necessary. */
5748 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5750 /* Perform the initialization. */
5753 if (TREE_CODE (init
) == INIT_EXPR
5754 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5756 /* Stick simple initializers in DECL_INITIAL so that
5757 -Wno-init-self works (c++/34772). */
5758 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5759 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5763 int saved_stmts_are_full_exprs_p
;
5765 /* If we're only initializing a single object, guard the
5766 destructors of any temporaries used in its initializer with
5767 its destructor. This isn't right for arrays because each
5768 element initialization is a full-expression. */
5769 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5770 wrap_temporary_cleanups (init
, cleanup
);
5772 gcc_assert (building_stmt_list_p ());
5773 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5774 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5775 finish_expr_stmt (init
);
5776 current_stmt_tree ()->stmts_are_full_exprs_p
=
5777 saved_stmts_are_full_exprs_p
;
5781 /* Set this to 0 so we can tell whether an aggregate which was
5782 initialized was ever used. Don't do this if it has a
5783 destructor, so we don't complain about the 'resource
5784 allocation is initialization' idiom. Now set
5785 attribute((unused)) on types so decls of that type will be
5786 marked used. (see TREE_USED, above.) */
5787 if (TYPE_NEEDS_CONSTRUCTING (type
)
5789 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5790 && DECL_NAME (decl
))
5791 TREE_USED (decl
) = 0;
5792 else if (already_used
)
5793 TREE_USED (decl
) = 1;
5796 finish_decl_cleanup (decl
, cleanup
);
5799 /* DECL is a VAR_DECL for a compiler-generated variable with static
5800 storage duration (like a virtual table) whose initializer is a
5801 compile-time constant. Initialize the variable and provide it to the
5805 initialize_artificial_var (tree decl
, VEC(constructor_elt
,gc
) *v
)
5808 gcc_assert (DECL_ARTIFICIAL (decl
));
5809 init
= build_constructor (TREE_TYPE (decl
), v
);
5810 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5811 DECL_INITIAL (decl
) = init
;
5812 DECL_INITIALIZED_P (decl
) = 1;
5813 determine_visibility (decl
);
5814 layout_var_decl (decl
);
5815 maybe_commonize_var (decl
);
5816 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5819 /* INIT is the initializer for a variable, as represented by the
5820 parser. Returns true iff INIT is type-dependent. */
5823 type_dependent_init_p (tree init
)
5825 if (TREE_CODE (init
) == TREE_LIST
)
5826 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5827 return any_type_dependent_elements_p (init
);
5828 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5829 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5831 VEC(constructor_elt
, gc
) *elts
;
5835 elts
= CONSTRUCTOR_ELTS (init
);
5836 nelts
= VEC_length (constructor_elt
, elts
);
5837 for (i
= 0; i
< nelts
; ++i
)
5838 if (type_dependent_init_p (VEC_index (constructor_elt
,
5843 /* It must be a simple expression, e.g., int i = 3; */
5844 return type_dependent_expression_p (init
);
5849 /* INIT is the initializer for a variable, as represented by the
5850 parser. Returns true iff INIT is value-dependent. */
5853 value_dependent_init_p (tree init
)
5855 if (TREE_CODE (init
) == TREE_LIST
)
5856 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5857 return any_value_dependent_elements_p (init
);
5858 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5859 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5861 VEC(constructor_elt
, gc
) *elts
;
5865 elts
= CONSTRUCTOR_ELTS (init
);
5866 nelts
= VEC_length (constructor_elt
, elts
);
5867 for (i
= 0; i
< nelts
; ++i
)
5868 if (value_dependent_init_p (VEC_index (constructor_elt
,
5873 /* It must be a simple expression, e.g., int i = 3; */
5874 return value_dependent_expression_p (init
);
5879 /* Finish processing of a declaration;
5880 install its line number and initial value.
5881 If the length of an array type is not known before,
5882 it must be determined now, from the initial value, or it is an error.
5884 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5885 true, then INIT is an integral constant expression.
5887 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5888 if the (init) syntax was used. */
5891 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5892 tree asmspec_tree
, int flags
)
5896 const char *asmspec
= NULL
;
5897 int was_readonly
= 0;
5898 bool var_definition_p
= false;
5901 if (decl
== error_mark_node
)
5906 error ("assignment (not initialization) in declaration");
5910 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5911 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5912 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5914 type
= TREE_TYPE (decl
);
5915 if (type
== error_mark_node
)
5918 /* Assume no cleanup is required. */
5919 cleanup
= NULL_TREE
;
5921 /* If a name was specified, get the string. */
5922 if (at_namespace_scope_p ())
5923 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
5924 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
5925 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
5927 if (current_class_type
5928 && CP_DECL_CONTEXT (decl
) == current_class_type
5929 && TYPE_BEING_DEFINED (current_class_type
)
5930 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
5931 && (DECL_INITIAL (decl
) || init
))
5932 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
5934 auto_node
= type_uses_auto (type
);
5938 if (init
== NULL_TREE
)
5940 error ("declaration of %q#D has no initializer", decl
);
5941 TREE_TYPE (decl
) = error_mark_node
;
5945 if (TREE_CODE (d_init
) == TREE_LIST
)
5946 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
5947 tf_warning_or_error
);
5948 d_init
= resolve_nondeduced_context (d_init
);
5949 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
5951 if (type
== error_mark_node
)
5955 if (!ensure_literal_type_for_constexpr_object (decl
))
5956 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
5958 if (TREE_CODE (decl
) == VAR_DECL
5959 && DECL_CLASS_SCOPE_P (decl
)
5960 && DECL_INITIALIZED_IN_CLASS_P (decl
))
5961 check_static_variable_definition (decl
, type
);
5963 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
5966 if (init
== ridpointers
[(int)RID_DELETE
])
5968 /* FIXME check this is 1st decl. */
5969 DECL_DELETED_FN (decl
) = 1;
5970 DECL_DECLARED_INLINE_P (decl
) = 1;
5971 DECL_INITIAL (decl
) = error_mark_node
;
5972 FOR_EACH_CLONE (clone
, decl
)
5974 DECL_DELETED_FN (clone
) = 1;
5975 DECL_DECLARED_INLINE_P (clone
) = 1;
5976 DECL_INITIAL (clone
) = error_mark_node
;
5980 else if (init
== ridpointers
[(int)RID_DEFAULT
])
5982 if (defaultable_fn_check (decl
))
5983 DECL_DEFAULTED_FN (decl
) = 1;
5985 DECL_INITIAL (decl
) = NULL_TREE
;
5989 if (init
&& TREE_CODE (decl
) == VAR_DECL
)
5991 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
5992 /* If DECL is a reference, then we want to know whether init is a
5993 reference constant; init_const_expr_p as passed tells us whether
5994 it's an rvalue constant. */
5995 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5996 init_const_expr_p
= potential_constant_expression (init
);
5997 if (init_const_expr_p
)
5999 /* Set these flags now for templates. We'll update the flags in
6000 store_init_value for instantiations. */
6001 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6002 if (decl_maybe_constant_var_p (decl
))
6003 TREE_CONSTANT (decl
) = 1;
6007 if (processing_template_decl
)
6009 bool type_dependent_p
;
6011 /* Add this declaration to the statement-tree. */
6012 if (at_function_scope_p ())
6013 add_decl_expr (decl
);
6015 type_dependent_p
= dependent_type_p (type
);
6017 if (check_for_bare_parameter_packs (init
))
6020 DECL_INITIAL (decl
) = NULL_TREE
;
6023 /* Generally, initializers in templates are expanded when the
6024 template is instantiated. But, if DECL is a variable constant
6025 then it can be used in future constant expressions, so its value
6026 must be available. */
6028 if (TREE_CODE (decl
) != VAR_DECL
|| dependent_type_p (type
))
6029 /* We can't do anything if the decl has dependent type. */;
6031 && init_const_expr_p
6032 && !type_dependent_p
6033 && decl_maybe_constant_var_p (decl
)
6034 && !type_dependent_init_p (init
)
6035 && !value_dependent_init_p (init
))
6037 /* This variable seems to be a non-dependent constant, so process
6038 its initializer. If check_initializer returns non-null the
6039 initialization wasn't constant after all. */
6040 tree init_code
= check_initializer (decl
, init
, flags
, &cleanup
);
6041 if (init_code
== NULL_TREE
)
6044 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6045 /* Deduce array size even if the initializer is dependent. */
6046 maybe_deduce_size_from_array_init (decl
, init
);
6049 DECL_INITIAL (decl
) = init
;
6053 /* Take care of TYPE_DECLs up front. */
6054 if (TREE_CODE (decl
) == TYPE_DECL
)
6056 if (type
!= error_mark_node
6057 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6059 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6060 warning (0, "shadowing previous type declaration of %q#D", decl
);
6061 set_identifier_type_value (DECL_NAME (decl
), decl
);
6064 /* If we have installed this as the canonical typedef for this
6065 type, and that type has not been defined yet, delay emitting
6066 the debug information for it, as we will emit it later. */
6067 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6068 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6069 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6071 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6076 /* A reference will be modified here, as it is initialized. */
6077 if (! DECL_EXTERNAL (decl
)
6078 && TREE_READONLY (decl
)
6079 && TREE_CODE (type
) == REFERENCE_TYPE
)
6082 TREE_READONLY (decl
) = 0;
6085 if (TREE_CODE (decl
) == VAR_DECL
)
6087 /* Only variables with trivial initialization and destruction can
6088 have thread-local storage. */
6089 if (DECL_THREAD_LOCAL_P (decl
)
6090 && (type_has_nontrivial_default_init (TREE_TYPE (decl
))
6091 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
6092 error ("%qD cannot be thread-local because it has non-trivial "
6093 "type %qT", decl
, TREE_TYPE (decl
));
6094 /* If this is a local variable that will need a mangled name,
6095 register it now. We must do this before processing the
6096 initializer for the variable, since the initialization might
6097 require a guard variable, and since the mangled name of the
6098 guard variable will depend on the mangled name of this
6100 if (DECL_FUNCTION_SCOPE_P (decl
)
6101 && TREE_STATIC (decl
)
6102 && !DECL_ARTIFICIAL (decl
))
6104 push_local_name (decl
);
6105 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6106 || DECL_DESTRUCTOR_P (current_function_decl
))
6107 /* Normally local_decls is populated during GIMPLE lowering,
6108 but [cd]tors are never actually compiled directly. We need
6109 to put statics on the list so we can deal with the label
6110 address extension. */
6111 add_local_decl (cfun
, decl
);
6114 /* Convert the initializer to the type of DECL, if we have not
6115 already initialized DECL. */
6116 if (!DECL_INITIALIZED_P (decl
)
6117 /* If !DECL_EXTERNAL then DECL is being defined. In the
6118 case of a static data member initialized inside the
6119 class-specifier, there can be an initializer even if DECL
6120 is *not* defined. */
6121 && (!DECL_EXTERNAL (decl
) || init
))
6123 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6126 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6127 /* Allow libjava/prims.cc define primitive classes. */
6128 if (init
!= NULL_TREE
6129 || jclass
== NULL_TREE
6130 || TREE_CODE (jclass
) != TYPE_DECL
6131 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6132 || !same_type_ignoring_top_level_qualifiers_p
6133 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6134 error ("Java object %qD not allocated with %<new%>", decl
);
6137 init
= check_initializer (decl
, init
, flags
, &cleanup
);
6138 /* Thread-local storage cannot be dynamically initialized. */
6139 if (DECL_THREAD_LOCAL_P (decl
) && init
)
6141 error ("%qD is thread-local and so cannot be dynamically "
6142 "initialized", decl
);
6146 /* Check that the initializer for a static data member was a
6147 constant. Although we check in the parser that the
6148 initializer is an integral constant expression, we do not
6149 simplify division-by-zero at the point at which it
6150 occurs. Therefore, in:
6152 struct S { static const int i = 7 / 0; };
6154 we issue an error at this point. It would
6155 probably be better to forbid division by zero in
6156 integral constant expressions. */
6157 if (DECL_EXTERNAL (decl
) && init
)
6159 error ("%qD cannot be initialized by a non-constant expression"
6160 " when being declared", decl
);
6161 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6169 The memory occupied by any object of static storage
6170 duration is zero-initialized at program startup before
6171 any other initialization takes place.
6173 We cannot create an appropriate initializer until after
6174 the type of DECL is finalized. If DECL_INITIAL is set,
6175 then the DECL is statically initialized, and any
6176 necessary zero-initialization has already been performed. */
6177 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6178 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6179 /*nelts=*/NULL_TREE
,
6180 /*static_storage_p=*/true);
6181 /* Remember that the initialization for this variable has
6183 DECL_INITIALIZED_P (decl
) = 1;
6184 /* This declaration is the definition of this variable,
6185 unless we are initializing a static data member within
6186 the class specifier. */
6187 if (!DECL_EXTERNAL (decl
))
6188 var_definition_p
= true;
6190 /* If the variable has an array type, lay out the type, even if
6191 there is no initializer. It is valid to index through the
6192 array, and we must get TYPE_ALIGN set correctly on the array
6194 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6197 if (TREE_STATIC (decl
)
6198 && !at_function_scope_p ()
6199 && current_function_decl
== NULL
)
6200 /* So decl is a global variable or a static member of a
6201 non local class. Record the types it uses
6202 so that we can decide later to emit debug info for them. */
6203 record_types_used_by_current_var_decl (decl
);
6205 else if (TREE_CODE (decl
) == FIELD_DECL
6206 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6207 error ("non-static data member %qD has Java class type", decl
);
6209 /* Add this declaration to the statement-tree. This needs to happen
6210 after the call to check_initializer so that the DECL_EXPR for a
6211 reference temp is added before the DECL_EXPR for the reference itself. */
6212 if (DECL_FUNCTION_SCOPE_P (decl
))
6213 add_decl_expr (decl
);
6215 /* Let the middle end know about variables and functions -- but not
6216 static data members in uninstantiated class templates. */
6217 if (TREE_CODE (decl
) == VAR_DECL
6218 || TREE_CODE (decl
) == FUNCTION_DECL
)
6220 if (TREE_CODE (decl
) == VAR_DECL
)
6222 layout_var_decl (decl
);
6223 maybe_commonize_var (decl
);
6226 /* This needs to happen after the linkage is set. */
6227 determine_visibility (decl
);
6229 if (var_definition_p
&& TREE_STATIC (decl
))
6231 /* If a TREE_READONLY variable needs initialization
6232 at runtime, it is no longer readonly and we need to
6233 avoid MEM_READONLY_P being set on RTL created for it. */
6236 if (TREE_READONLY (decl
))
6237 TREE_READONLY (decl
) = 0;
6240 else if (was_readonly
)
6241 TREE_READONLY (decl
) = 1;
6244 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6246 /* Check for abstractness of the type. Notice that there is no
6247 need to strip array types here since the check for those types
6248 is already done within create_array_type_for_decl. */
6249 if (TREE_CODE (type
) == FUNCTION_TYPE
6250 || TREE_CODE (type
) == METHOD_TYPE
)
6251 abstract_virtuals_error (decl
, TREE_TYPE (type
));
6253 abstract_virtuals_error (decl
, type
);
6255 if (TREE_TYPE (decl
) == error_mark_node
)
6256 /* No initialization required. */
6258 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6262 if (init
== ridpointers
[(int)RID_DEFAULT
])
6264 /* An out-of-class default definition is defined at
6265 the point where it is explicitly defaulted. */
6266 if (DECL_DELETED_FN (decl
))
6267 maybe_explain_implicit_delete (decl
);
6268 else if (DECL_INITIAL (decl
) == error_mark_node
)
6269 synthesize_method (decl
);
6272 error ("function %q#D is initialized like a variable", decl
);
6274 /* else no initialization required. */
6276 else if (DECL_EXTERNAL (decl
)
6277 && ! (DECL_LANG_SPECIFIC (decl
)
6278 && DECL_NOT_REALLY_EXTERN (decl
)))
6281 DECL_INITIAL (decl
) = init
;
6283 /* A variable definition. */
6284 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6285 /* Initialize the local variable. */
6286 initialize_local_var (decl
, init
);
6288 /* If a variable is defined, and then a subsequent
6289 definition with external linkage is encountered, we will
6290 get here twice for the same variable. We want to avoid
6291 calling expand_static_init more than once. For variables
6292 that are not static data members, we can call
6293 expand_static_init only when we actually process the
6294 initializer. It is not legal to redeclare a static data
6295 member, so this issue does not arise in that case. */
6296 else if (var_definition_p
&& TREE_STATIC (decl
))
6297 expand_static_init (decl
, init
);
6300 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6301 reference, insert it in the statement-tree now. */
6303 push_cleanup (decl
, cleanup
, false);
6306 TREE_READONLY (decl
) = 1;
6309 /* Returns a declaration for a VAR_DECL as if:
6311 extern "C" TYPE NAME;
6313 had been seen. Used to create compiler-generated global
6317 declare_global_var (tree name
, tree type
)
6321 push_to_top_level ();
6322 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6323 TREE_PUBLIC (decl
) = 1;
6324 DECL_EXTERNAL (decl
) = 1;
6325 DECL_ARTIFICIAL (decl
) = 1;
6326 /* If the user has explicitly declared this variable (perhaps
6327 because the code we are compiling is part of a low-level runtime
6328 library), then it is possible that our declaration will be merged
6329 with theirs by pushdecl. */
6330 decl
= pushdecl (decl
);
6331 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6332 pop_from_top_level ();
6337 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6338 if "__cxa_atexit" is not being used) corresponding to the function
6339 to be called when the program exits. */
6342 get_atexit_fn_ptr_type (void)
6346 if (!atexit_fn_ptr_type_node
)
6349 if (flag_use_cxa_atexit
6350 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6351 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6352 arg_type
= ptr_type_node
;
6354 /* The parameter to "atexit" is "void (*)(void)". */
6355 arg_type
= NULL_TREE
;
6357 fn_type
= build_function_type_list (void_type_node
,
6358 arg_type
, NULL_TREE
);
6359 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6362 return atexit_fn_ptr_type_node
;
6365 /* Returns a pointer to the `atexit' function. Note that if
6366 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6367 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6370 get_atexit_node (void)
6376 bool use_aeabi_atexit
;
6381 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6383 /* The declaration for `__cxa_atexit' is:
6385 int __cxa_atexit (void (*)(void *), void *, void *)
6387 We build up the argument types and then the function type
6389 tree argtype0
, argtype1
, argtype2
;
6391 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6392 /* First, build the pointer-to-function type for the first
6394 fn_ptr_type
= get_atexit_fn_ptr_type ();
6395 /* Then, build the rest of the argument types. */
6396 argtype2
= ptr_type_node
;
6397 if (use_aeabi_atexit
)
6399 argtype1
= fn_ptr_type
;
6400 argtype0
= ptr_type_node
;
6404 argtype1
= ptr_type_node
;
6405 argtype0
= fn_ptr_type
;
6407 /* And the final __cxa_atexit type. */
6408 fn_type
= build_function_type_list (integer_type_node
,
6409 argtype0
, argtype1
, argtype2
,
6411 fn_ptr_type
= build_pointer_type (fn_type
);
6412 if (use_aeabi_atexit
)
6413 name
= "__aeabi_atexit";
6415 name
= "__cxa_atexit";
6419 /* The declaration for `atexit' is:
6421 int atexit (void (*)());
6423 We build up the argument types and then the function type
6425 fn_ptr_type
= get_atexit_fn_ptr_type ();
6426 /* Build the final atexit type. */
6427 fn_type
= build_function_type_list (integer_type_node
,
6428 fn_ptr_type
, NULL_TREE
);
6432 /* Now, build the function declaration. */
6433 push_lang_context (lang_name_c
);
6434 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6435 mark_used (atexit_fndecl
);
6436 pop_lang_context ();
6437 atexit_node
= decay_conversion (atexit_fndecl
);
6442 /* Returns the __dso_handle VAR_DECL. */
6445 get_dso_handle_node (void)
6447 if (dso_handle_node
)
6448 return dso_handle_node
;
6450 /* Declare the variable. */
6451 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6454 #ifdef HAVE_GAS_HIDDEN
6455 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6456 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6459 return dso_handle_node
;
6462 /* Begin a new function with internal linkage whose job will be simply
6463 to destroy some particular variable. */
6465 static GTY(()) int start_cleanup_cnt
;
6468 start_cleanup_fn (void)
6473 bool use_cxa_atexit
= flag_use_cxa_atexit
6474 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6476 push_to_top_level ();
6478 /* No need to mangle this. */
6479 push_lang_context (lang_name_c
);
6481 /* Build the name of the function. */
6482 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6483 /* Build the function declaration. */
6484 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6485 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6486 /* It's a function with internal linkage, generated by the
6488 TREE_PUBLIC (fndecl
) = 0;
6489 DECL_ARTIFICIAL (fndecl
) = 1;
6490 /* Make the function `inline' so that it is only emitted if it is
6491 actually needed. It is unlikely that it will be inlined, since
6492 it is only called via a function pointer, but we avoid unnecessary
6493 emissions this way. */
6494 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6495 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6496 /* Build the parameter. */
6501 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6502 DECL_CONTEXT (parmdecl
) = fndecl
;
6503 TREE_USED (parmdecl
) = 1;
6504 DECL_READ_P (parmdecl
) = 1;
6505 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6509 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6511 pop_lang_context ();
6513 return current_function_decl
;
6516 /* Finish the cleanup function begun by start_cleanup_fn. */
6519 end_cleanup_fn (void)
6521 expand_or_defer_fn (finish_function (0));
6523 pop_from_top_level ();
6526 /* Generate code to handle the destruction of DECL, an object with
6527 static storage duration. */
6530 register_dtor_fn (tree decl
)
6537 tree arg0
, arg1
= NULL_TREE
, arg2
= NULL_TREE
;
6539 type
= TREE_TYPE (decl
);
6540 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6541 return void_zero_node
;
6543 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6544 a class object, we can just pass the destructor to
6545 "__cxa_atexit"; we don't have to build a temporary function to do
6547 use_dtor
= (flag_use_cxa_atexit
6548 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
6549 && CLASS_TYPE_P (type
));
6554 /* Find the destructor. */
6555 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6556 gcc_assert (idx
>= 0);
6557 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
6558 /* Make sure it is accessible. */
6559 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
6563 /* Call build_cleanup before we enter the anonymous function so
6564 that any access checks will be done relative to the current
6565 scope, rather than the scope of the anonymous function. */
6566 build_cleanup (decl
);
6568 /* Now start the function. */
6569 cleanup
= start_cleanup_fn ();
6571 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6572 to the original function, rather than the anonymous one. That
6573 will make the back end think that nested functions are in use,
6574 which causes confusion. */
6575 push_deferring_access_checks (dk_no_check
);
6576 fcall
= build_cleanup (decl
);
6577 pop_deferring_access_checks ();
6579 /* Create the body of the anonymous function. */
6580 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6581 finish_expr_stmt (fcall
);
6582 finish_compound_stmt (compound_stmt
);
6586 /* Call atexit with the cleanup function. */
6587 mark_used (cleanup
);
6588 cleanup
= build_address (cleanup
);
6589 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6595 /* We must convert CLEANUP to the type that "__cxa_atexit"
6597 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6598 /* "__cxa_atexit" will pass the address of DECL to the
6599 cleanup function. */
6601 addr
= build_address (decl
);
6602 /* The declared type of the parameter to "__cxa_atexit" is
6603 "void *". For plain "T*", we could just let the
6604 machinery in cp_build_function_call convert it -- but if the
6605 type is "cv-qualified T *", then we need to convert it
6606 before passing it in, to avoid spurious errors. */
6607 addr
= build_nop (ptr_type_node
, addr
);
6610 /* Since the cleanup functions we build ignore the address
6611 they're given, there's no reason to pass the actual address
6612 in, and, in general, it's cheaper to pass NULL than any
6614 addr
= null_pointer_node
;
6615 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6616 tf_warning_or_error
);
6617 if (targetm
.cxx
.use_aeabi_atexit ())
6630 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error
,
6631 arg0
, arg1
, arg2
, NULL_TREE
);
6634 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6635 is its initializer. Generate code to handle the construction
6636 and destruction of DECL. */
6639 expand_static_init (tree decl
, tree init
)
6641 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6642 gcc_assert (TREE_STATIC (decl
));
6644 /* Some variables require no dynamic initialization. */
6646 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6649 if (DECL_FUNCTION_SCOPE_P (decl
))
6651 /* Emit code to perform this initialization but once. */
6652 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6653 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6654 tree guard
, guard_addr
;
6657 /* Emit code to perform this initialization but once. This code
6660 static <type> guard;
6661 if (!guard.first_byte) {
6662 if (__cxa_guard_acquire (&guard)) {
6665 // Do initialization.
6666 flag = true; __cxa_guard_release (&guard);
6667 // Register variable for destruction at end of program.
6669 if (!flag) __cxa_guard_abort (&guard);
6673 Note that the `flag' variable is only set to 1 *after* the
6674 initialization is complete. This ensures that an exception,
6675 thrown during the construction, will cause the variable to
6676 reinitialized when we pass through this code again, as per:
6680 If the initialization exits by throwing an exception, the
6681 initialization is not complete, so it will be tried again
6682 the next time control enters the declaration.
6684 This process should be thread-safe, too; multiple threads
6685 should not be able to initialize the variable more than
6688 /* Create the guard variable. */
6689 guard
= get_guard (decl
);
6691 /* This optimization isn't safe on targets with relaxed memory
6692 consistency. On such targets we force synchronization in
6693 __cxa_guard_acquire. */
6694 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6696 /* Begin the conditional initialization. */
6697 if_stmt
= begin_if_stmt ();
6698 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6699 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6702 if (flag_threadsafe_statics
)
6704 tree vfntype
= NULL_TREE
;
6705 tree acquire_name
, release_name
, abort_name
;
6706 tree acquire_fn
, release_fn
, abort_fn
;
6707 guard_addr
= build_address (guard
);
6709 acquire_name
= get_identifier ("__cxa_guard_acquire");
6710 release_name
= get_identifier ("__cxa_guard_release");
6711 abort_name
= get_identifier ("__cxa_guard_abort");
6712 acquire_fn
= identifier_global_value (acquire_name
);
6713 release_fn
= identifier_global_value (release_name
);
6714 abort_fn
= identifier_global_value (abort_name
);
6716 acquire_fn
= push_library_fn
6717 (acquire_name
, build_function_type_list (integer_type_node
,
6718 TREE_TYPE (guard_addr
),
6721 if (!release_fn
|| !abort_fn
)
6722 vfntype
= build_function_type_list (void_type_node
,
6723 TREE_TYPE (guard_addr
),
6726 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6728 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6730 inner_if_stmt
= begin_if_stmt ();
6731 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6734 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6735 begin
= get_target_expr (boolean_false_node
);
6736 flag
= TARGET_EXPR_SLOT (begin
);
6738 TARGET_EXPR_CLEANUP (begin
)
6739 = build3 (COND_EXPR
, void_type_node
, flag
,
6741 build_call_n (abort_fn
, 1, guard_addr
));
6742 CLEANUP_EH_ONLY (begin
) = 1;
6744 /* Do the initialization itself. */
6745 init
= add_stmt_to_compound (begin
, init
);
6746 init
= add_stmt_to_compound
6747 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6748 init
= add_stmt_to_compound
6749 (init
, build_call_n (release_fn
, 1, guard_addr
));
6752 init
= add_stmt_to_compound (init
, set_guard (guard
));
6754 /* Use atexit to register a function for destroying this static
6756 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
6758 finish_expr_stmt (init
);
6760 if (flag_threadsafe_statics
)
6762 finish_compound_stmt (inner_then_clause
);
6763 finish_then_clause (inner_if_stmt
);
6764 finish_if_stmt (inner_if_stmt
);
6767 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6769 finish_compound_stmt (then_clause
);
6770 finish_then_clause (if_stmt
);
6771 finish_if_stmt (if_stmt
);
6775 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6779 /* Make TYPE a complete type based on INITIAL_VALUE.
6780 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6781 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6782 3 if the initializer list is empty (in pedantic mode). */
6785 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6788 tree type
, elt_type
;
6792 unsigned HOST_WIDE_INT i
;
6795 /* An array of character type can be initialized from a
6796 brace-enclosed string constant.
6798 FIXME: this code is duplicated from reshape_init. Probably
6799 we should just call reshape_init here? */
6800 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6801 && TREE_CODE (initial_value
) == CONSTRUCTOR
6802 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6804 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6805 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6807 if (TREE_CODE (value
) == STRING_CST
6808 && VEC_length (constructor_elt
, v
) == 1)
6809 initial_value
= value
;
6812 /* If any of the elements are parameter packs, we can't actually
6813 complete this type now because the array size is dependent. */
6814 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
6816 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
6819 if (PACK_EXPANSION_P (value
))
6825 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6827 /* We can create the array before the element type is complete, which
6828 means that we didn't have these two bits set in the original type
6829 either. In completing the type, we are expected to propagate these
6830 bits. See also complete_type which does the same thing for arrays
6833 if (TYPE_DOMAIN (type
))
6835 elt_type
= TREE_TYPE (type
);
6836 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6837 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6838 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6844 /* As above, but either give an error or reject zero-size arrays, depending
6848 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
6849 bool do_default
, tsubst_flags_t complain
)
6852 bool sfinae
= !(complain
& tf_error
);
6853 /* In SFINAE context we can't be lenient about zero-size arrays. */
6856 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
6862 /* Not an error. */;
6863 else if (failure
== 1)
6864 error ("initializer fails to determine size of %qT", *ptype
);
6865 else if (failure
== 2)
6868 error ("array size missing in %qT", *ptype
);
6870 else if (failure
== 3)
6871 error ("zero-size array %qT", *ptype
);
6872 *ptype
= error_mark_node
;
6877 /* Return zero if something is declared to be a member of type
6878 CTYPE when in the context of CUR_TYPE. STRING is the error
6879 message to print in that case. Otherwise, quietly return 1. */
6882 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6884 if (ctype
&& ctype
!= cur_type
)
6886 if (flags
== DTOR_FLAG
)
6887 error ("destructor for alien class %qT cannot be a member", ctype
);
6889 error ("constructor for alien class %qT cannot be a member", ctype
);
6895 /* Subroutine of `grokdeclarator'. */
6897 /* Generate errors possibly applicable for a given set of specifiers.
6898 This is for ARM $7.1.2. */
6901 bad_specifiers (tree object
,
6902 enum bad_spec_place type
,
6913 error ("%qD declared as a %<virtual%> variable", object
);
6915 error ("%qD declared as an %<inline%> variable", object
);
6917 error ("%<const%> and %<volatile%> function specifiers on "
6918 "%qD invalid in variable declaration", object
);
6922 error ("%qD declared as a %<virtual%> parameter", object
);
6924 error ("%qD declared as an %<inline%> parameter", object
);
6926 error ("%<const%> and %<volatile%> function specifiers on "
6927 "%qD invalid in parameter declaration", object
);
6931 error ("%qD declared as a %<virtual%> type", object
);
6933 error ("%qD declared as an %<inline%> type", object
);
6935 error ("%<const%> and %<volatile%> function specifiers on "
6936 "%qD invalid in type declaration", object
);
6940 error ("%qD declared as a %<virtual%> field", object
);
6942 error ("%qD declared as an %<inline%> field", object
);
6944 error ("%<const%> and %<volatile%> function specifiers on "
6945 "%qD invalid in field declaration", object
);
6951 error ("%q+D declared as a friend", object
);
6953 && (TREE_CODE (object
) == TYPE_DECL
6954 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
6955 && !TYPE_REFFN_P (TREE_TYPE (object
))
6956 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
6957 error ("%q+D declared with an exception specification", object
);
6960 /* DECL is a member function or static data member and is presently
6961 being defined. Check that the definition is taking place in a
6965 check_class_member_definition_namespace (tree decl
)
6967 /* These checks only apply to member functions and static data
6969 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
6970 || TREE_CODE (decl
) == VAR_DECL
);
6971 /* We check for problems with specializations in pt.c in
6972 check_specialization_namespace, where we can issue better
6974 if (processing_specialization
)
6976 /* There are no restrictions on the placement of
6977 explicit instantiations. */
6978 if (processing_explicit_instantiation
)
6982 A member function definition that appears outside of the
6983 class definition shall appear in a namespace scope enclosing
6984 the class definition.
6988 The definition for a static data member shall appear in a
6989 namespace scope enclosing the member's class definition. */
6990 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
6991 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
6992 decl
, DECL_CONTEXT (decl
));
6995 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6996 METHOD_TYPE for a non-static member function; QUALS are the
6997 cv-qualifiers that apply to the function. */
7000 build_this_parm (tree type
, cp_cv_quals quals
)
7005 cp_cv_quals this_quals
;
7007 if (CLASS_TYPE_P (type
))
7010 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7011 this_type
= build_pointer_type (this_type
);
7014 this_type
= type_of_this_parm (type
);
7015 /* The `this' parameter is implicitly `const'; it cannot be
7017 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7018 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7019 parm
= build_artificial_parm (this_identifier
, qual_type
);
7020 cp_apply_type_quals_to_decl (this_quals
, parm
);
7024 /* DECL is a static member function. Complain if it was declared
7025 with function-cv-quals. */
7028 check_static_quals (tree decl
, cp_cv_quals quals
)
7030 if (quals
!= TYPE_UNQUALIFIED
)
7031 error ("static member function %q#D declared with type qualifiers",
7035 /* CTYPE is class type, or null if non-class.
7036 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7038 DECLARATOR is the function's name.
7039 PARMS is a chain of PARM_DECLs for the function.
7040 VIRTUALP is truthvalue of whether the function is virtual or not.
7041 FLAGS are to be passed through to `grokclassfn'.
7042 QUALS are qualifiers indicating whether the function is `const'
7044 RAISES is a list of exceptions that this function can raise.
7045 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7046 not look, and -1 if we should not call `grokclassfn' at all.
7048 SFK is the kind of special function (if any) for the new function.
7050 Returns `NULL_TREE' if something goes wrong, after issuing
7051 applicable error messages. */
7054 grokfndecl (tree ctype
,
7058 tree orig_declarator
,
7060 enum overload_flags flags
,
7067 special_function_kind sfk
,
7072 location_t location
)
7075 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7079 type
= build_exception_variant (type
, raises
);
7081 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7083 /* If we have an explicit location, use it, otherwise use whatever
7084 build_lang_decl used (probably input_location). */
7085 if (location
!= UNKNOWN_LOCATION
)
7086 DECL_SOURCE_LOCATION (decl
) = location
;
7088 if (TREE_CODE (type
) == METHOD_TYPE
)
7091 parm
= build_this_parm (type
, quals
);
7092 DECL_CHAIN (parm
) = parms
;
7095 DECL_ARGUMENTS (decl
) = parms
;
7096 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7097 DECL_CONTEXT (t
) = decl
;
7098 /* Propagate volatile out from type to decl. */
7099 if (TYPE_VOLATILE (type
))
7100 TREE_THIS_VOLATILE (decl
) = 1;
7102 /* Setup decl according to sfk. */
7105 case sfk_constructor
:
7106 case sfk_copy_constructor
:
7107 case sfk_move_constructor
:
7108 DECL_CONSTRUCTOR_P (decl
) = 1;
7110 case sfk_destructor
:
7111 DECL_DESTRUCTOR_P (decl
) = 1;
7117 /* If pointers to member functions use the least significant bit to
7118 indicate whether a function is virtual, ensure a pointer
7119 to this function will have that bit clear. */
7120 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7121 && TREE_CODE (type
) == METHOD_TYPE
7122 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7123 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7126 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7130 ("defining explicit specialization %qD in friend declaration",
7134 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7135 tree args
= TREE_OPERAND (orig_declarator
, 1);
7137 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7139 /* Something like `template <class T> friend void f<T>()'. */
7140 error ("invalid use of template-id %qD in declaration "
7141 "of primary template",
7147 /* A friend declaration of the form friend void f<>(). Record
7148 the information in the TEMPLATE_ID_EXPR. */
7149 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7151 if (TREE_CODE (fns
) == COMPONENT_REF
)
7153 /* Due to bison parser ickiness, we will have already looked
7154 up an operator_name or PFUNCNAME within the current class
7155 (see template_id in parse.y). If the current class contains
7156 such a name, we'll get a COMPONENT_REF here. Undo that. */
7158 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7159 == current_class_type
);
7160 fns
= TREE_OPERAND (fns
, 1);
7162 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
7163 || TREE_CODE (fns
) == OVERLOAD
);
7164 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7166 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7167 if (TREE_PURPOSE (t
)
7168 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7170 error ("default arguments are not allowed in declaration "
7171 "of friend template specialization %qD",
7178 error ("%<inline%> is not allowed in declaration of friend "
7179 "template specialization %qD",
7186 /* If this decl has namespace scope, set that up. */
7188 set_decl_namespace (decl
, in_namespace
, friendp
);
7190 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7192 /* `main' and builtins have implicit 'C' linkage. */
7193 if ((MAIN_NAME_P (declarator
)
7194 || (IDENTIFIER_LENGTH (declarator
) > 10
7195 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7196 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7197 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7198 && current_lang_name
== lang_name_cplusplus
7199 && ctype
== NULL_TREE
7200 && DECL_FILE_SCOPE_P (decl
))
7201 SET_DECL_LANGUAGE (decl
, lang_c
);
7203 /* Should probably propagate const out from type to decl I bet (mrs). */
7206 DECL_STATIC_FUNCTION_P (decl
) = 1;
7207 DECL_CONTEXT (decl
) = ctype
;
7212 DECL_CONTEXT (decl
) = ctype
;
7214 check_class_member_definition_namespace (decl
);
7217 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7219 if (processing_template_decl
)
7220 error ("cannot declare %<::main%> to be a template");
7222 error ("cannot declare %<::main%> to be inline");
7224 error ("cannot declare %<::main%> to be static");
7229 /* Members of anonymous types and local classes have no linkage; make
7230 them internal. If a typedef is made later, this will be changed. */
7231 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7232 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7235 if (publicp
&& cxx_dialect
== cxx98
)
7237 /* [basic.link]: A name with no linkage (notably, the name of a class
7238 or enumeration declared in a local scope) shall not be used to
7239 declare an entity with linkage.
7241 DR 757 relaxes this restriction for C++0x. */
7242 t
= no_linkage_check (TREE_TYPE (decl
),
7243 /*relaxed_p=*/false);
7246 if (TYPE_ANONYMOUS_P (t
))
7248 if (DECL_EXTERN_C_P (decl
))
7249 /* Allow this; it's pretty common in C. */;
7252 permerror (input_location
, "anonymous type with no linkage "
7253 "used to declare function %q#D with linkage",
7255 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7256 permerror (input_location
, "%q+#D does not refer to the unqualified "
7257 "type, so it is not used for linkage",
7262 permerror (input_location
, "type %qT with no linkage used to "
7263 "declare function %q#D with linkage", t
, decl
);
7267 TREE_PUBLIC (decl
) = publicp
;
7270 DECL_INTERFACE_KNOWN (decl
) = 1;
7271 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7274 /* If the declaration was declared inline, mark it as such. */
7276 DECL_DECLARED_INLINE_P (decl
) = 1;
7278 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7280 DECL_EXTERNAL (decl
) = 1;
7281 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7284 ? G_("static member function %qD cannot have cv-qualifier")
7285 : G_("non-member function %qD cannot have cv-qualifier"),
7287 quals
= TYPE_UNQUALIFIED
;
7290 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7291 && !grok_op_properties (decl
, /*complain=*/true))
7295 /* Make the init_value nonzero so pushdecl knows this is not
7296 tentative. error_mark_node is replaced later with the BLOCK. */
7297 DECL_INITIAL (decl
) = error_mark_node
;
7299 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7300 TREE_NOTHROW (decl
) = 1;
7302 /* Caller will do the rest of this. */
7306 if (ctype
!= NULL_TREE
)
7307 grokclassfn (ctype
, decl
, flags
);
7309 decl
= check_explicit_specialization (orig_declarator
, decl
,
7312 4 * (friendp
!= 0));
7313 if (decl
== error_mark_node
)
7316 if (DECL_STATIC_FUNCTION_P (decl
))
7317 check_static_quals (decl
, quals
);
7321 cplus_decl_attributes (&decl
, *attrlist
, 0);
7322 *attrlist
= NULL_TREE
;
7325 /* Check main's type after attributes have been applied. */
7326 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7328 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7331 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7333 error ("%<::main%> must return %<int%>");
7334 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7335 TREE_TYPE (decl
) = newtype
;
7338 check_main_parameter_types (decl
);
7341 if (ctype
!= NULL_TREE
7342 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7345 tree old_decl
= check_classfn (ctype
, decl
,
7346 (processing_template_decl
7347 > template_class_depth (ctype
))
7348 ? current_template_parms
7351 if (old_decl
== error_mark_node
)
7359 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7360 /* Because grokfndecl is always supposed to return a
7361 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7362 here. We depend on our callers to figure out that its
7363 really a template that's being returned. */
7364 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7366 if (DECL_STATIC_FUNCTION_P (old_decl
)
7367 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7369 /* Remove the `this' parm added by grokclassfn. */
7370 revert_static_member_fn (decl
);
7371 check_static_quals (decl
, quals
);
7373 if (DECL_ARTIFICIAL (old_decl
))
7375 error ("definition of implicitly-declared %qD", old_decl
);
7379 /* Since we've smashed OLD_DECL to its
7380 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7381 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7382 decl
= DECL_TEMPLATE_RESULT (decl
);
7384 /* Attempt to merge the declarations. This can fail, in
7385 the case of some invalid specialization declarations. */
7386 pushed_scope
= push_scope (ctype
);
7387 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7389 pop_scope (pushed_scope
);
7392 error ("no %q#D member function declared in class %qT",
7400 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7403 if (ctype
== NULL_TREE
|| check
)
7407 DECL_VIRTUAL_P (decl
) = 1;
7412 /* decl is a FUNCTION_DECL.
7413 specifiers are the parsed virt-specifiers.
7415 Set flags to reflect the virt-specifiers.
7420 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7422 if (decl
== NULL_TREE
)
7424 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7425 DECL_OVERRIDE_P (decl
) = 1;
7426 if (specifiers
& VIRT_SPEC_FINAL
)
7427 DECL_FINAL_P (decl
) = 1;
7431 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7432 the linkage that DECL will receive in the object file. */
7435 set_linkage_for_static_data_member (tree decl
)
7437 /* A static data member always has static storage duration and
7438 external linkage. Note that static data members are forbidden in
7439 local classes -- the only situation in which a class has
7440 non-external linkage. */
7441 TREE_PUBLIC (decl
) = 1;
7442 TREE_STATIC (decl
) = 1;
7443 /* For non-template classes, static data members are always put
7444 out in exactly those files where they are defined, just as
7445 with ordinary namespace-scope variables. */
7446 if (!processing_template_decl
)
7447 DECL_INTERFACE_KNOWN (decl
) = 1;
7450 /* Create a VAR_DECL named NAME with the indicated TYPE.
7452 If SCOPE is non-NULL, it is the class type or namespace containing
7453 the variable. If SCOPE is NULL, the variable should is created in
7454 the innermost enclosings scope. */
7457 grokvardecl (tree type
,
7459 const cp_decl_specifier_seq
*declspecs
,
7465 tree explicit_scope
;
7467 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
7469 /* Compute the scope in which to place the variable, but remember
7470 whether or not that scope was explicitly specified by the user. */
7471 explicit_scope
= scope
;
7474 /* An explicit "extern" specifier indicates a namespace-scope
7476 if (declspecs
->storage_class
== sc_extern
)
7477 scope
= current_decl_namespace ();
7478 else if (!at_function_scope_p ())
7479 scope
= current_scope ();
7483 && (/* If the variable is a namespace-scope variable declared in a
7484 template, we need DECL_LANG_SPECIFIC. */
7485 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7486 /* Similarly for namespace-scope variables with language linkage
7488 || (TREE_CODE (scope
) == NAMESPACE_DECL
7489 && current_lang_name
!= lang_name_cplusplus
)
7490 /* Similarly for static data members. */
7492 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7494 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7496 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7497 set_decl_namespace (decl
, explicit_scope
, 0);
7499 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7501 if (declspecs
->storage_class
== sc_extern
)
7503 DECL_THIS_EXTERN (decl
) = 1;
7504 DECL_EXTERNAL (decl
) = !initialized
;
7507 if (DECL_CLASS_SCOPE_P (decl
))
7509 set_linkage_for_static_data_member (decl
);
7510 /* This function is only called with out-of-class definitions. */
7511 DECL_EXTERNAL (decl
) = 0;
7512 check_class_member_definition_namespace (decl
);
7514 /* At top level, either `static' or no s.c. makes a definition
7515 (perhaps tentative), and absence of `static' makes it public. */
7516 else if (toplevel_bindings_p ())
7518 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7519 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7520 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7522 /* Not at top level, only `static' makes a static definition. */
7525 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7526 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7529 if (declspecs
->specs
[(int)ds_thread
])
7530 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7532 /* If the type of the decl has no linkage, make sure that we'll
7533 notice that in mark_used. */
7534 if (cxx_dialect
> cxx98
7535 && decl_linkage (decl
) != lk_none
7536 && DECL_LANG_SPECIFIC (decl
) == NULL
7537 && !DECL_EXTERN_C_P (decl
)
7538 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7539 retrofit_lang_decl (decl
);
7541 if (TREE_PUBLIC (decl
))
7543 /* [basic.link]: A name with no linkage (notably, the name of a class
7544 or enumeration declared in a local scope) shall not be used to
7545 declare an entity with linkage.
7547 DR 757 relaxes this restriction for C++0x. */
7548 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7549 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7552 if (TYPE_ANONYMOUS_P (t
))
7554 if (DECL_EXTERN_C_P (decl
))
7555 /* Allow this; it's pretty common in C. */
7559 /* DRs 132, 319 and 389 seem to indicate types with
7560 no linkage can only be used to declare extern "C"
7561 entities. Since it's not always an error in the
7562 ISO C++ 90 Standard, we only issue a warning. */
7563 warning (0, "anonymous type with no linkage used to declare "
7564 "variable %q#D with linkage", decl
);
7565 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7566 warning (0, "%q+#D does not refer to the unqualified "
7567 "type, so it is not used for linkage",
7572 warning (0, "type %qT with no linkage used to declare variable "
7573 "%q#D with linkage", t
, decl
);
7577 DECL_INTERFACE_KNOWN (decl
) = 1;
7582 /* Create and return a canonical pointer to member function type, for
7583 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7586 build_ptrmemfunc_type (tree type
)
7590 tree unqualified_variant
= NULL_TREE
;
7592 if (type
== error_mark_node
)
7595 /* If a canonical type already exists for this type, use it. We use
7596 this method instead of type_hash_canon, because it only does a
7597 simple equality check on the list of field members. */
7599 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7602 /* Make sure that we always have the unqualified pointer-to-member
7604 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7606 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7608 t
= make_class_type (RECORD_TYPE
);
7609 xref_basetypes (t
, NULL_TREE
);
7611 /* Let the front end know this is a pointer to member function... */
7612 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7613 /* ... and not really a class type. */
7614 SET_CLASS_TYPE_P (t
, 0);
7616 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7619 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7621 DECL_CHAIN (field
) = fields
;
7624 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7626 /* Zap out the name so that the back end will give us the debugging
7627 information for this anonymous RECORD_TYPE. */
7628 TYPE_NAME (t
) = NULL_TREE
;
7630 /* If this is not the unqualified form of this pointer-to-member
7631 type, set the TYPE_MAIN_VARIANT for this type to be the
7632 unqualified type. Since they are actually RECORD_TYPEs that are
7633 not variants of each other, we must do this manually.
7634 As we just built a new type there is no need to do yet another copy. */
7635 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7637 int type_quals
= cp_type_quals (type
);
7638 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7639 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7640 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7641 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7642 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7643 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7644 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7647 /* Cache this pointer-to-member type so that we can find it again
7649 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7651 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7652 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7653 else if (TYPE_CANONICAL (type
) != type
)
7654 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7659 /* Create and return a pointer to data member type. */
7662 build_ptrmem_type (tree class_type
, tree member_type
)
7664 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7666 cp_cv_quals quals
= type_memfn_quals (member_type
);
7667 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7668 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7672 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7673 return build_offset_type (class_type
, member_type
);
7677 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7678 Check to see that the definition is valid. Issue appropriate error
7679 messages. Return 1 if the definition is particularly bad, or 0
7683 check_static_variable_definition (tree decl
, tree type
)
7685 /* Can't check yet if we don't know the type. */
7686 if (dependent_type_p (type
))
7688 /* If DECL is declared constexpr, we'll do the appropriate checks
7689 in check_initializer. */
7690 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
7692 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7694 if (literal_type_p (type
))
7695 error ("%<constexpr%> needed for in-class initialization of static "
7696 "data member %q#D of non-integral type", decl
);
7698 error ("in-class initialization of static data member %q#D of "
7699 "non-literal type", decl
);
7703 /* Motion 10 at San Diego: If a static const integral data member is
7704 initialized with an integral constant expression, the initializer
7705 may appear either in the declaration (within the class), or in
7706 the definition, but not both. If it appears in the class, the
7707 member is a member constant. The file-scope definition is always
7709 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
7711 error ("invalid in-class initialization of static data member "
7712 "of non-integral type %qT",
7716 else if (!CP_TYPE_CONST_P (type
))
7717 error ("ISO C++ forbids in-class initialization of non-const "
7718 "static member %qD",
7720 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7721 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids initialization of member constant "
7722 "%qD of non-integral type %qT", decl
, type
);
7727 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7728 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7729 expressions out into temporary variables so that walk_tree doesn't
7730 step into them (c++/15764). */
7733 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
7735 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
7736 tree expr
= *expr_p
;
7737 if (TREE_CODE (expr
) == SAVE_EXPR
)
7739 tree op
= TREE_OPERAND (expr
, 0);
7740 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
7741 if (TREE_SIDE_EFFECTS (op
))
7742 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
7745 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
7750 /* Entry point for the above. */
7753 stabilize_vla_size (tree size
)
7755 struct pointer_set_t
*pset
= pointer_set_create ();
7756 /* Break out any function calls into temporary variables. */
7757 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
7760 /* Given the SIZE (i.e., number of elements) in an array, compute an
7761 appropriate index type for the array. If non-NULL, NAME is the
7762 name of the thing being declared. */
7765 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
7770 tree abi_1_itype
= NULL_TREE
;
7772 if (error_operand_p (size
))
7773 return error_mark_node
;
7775 type
= TREE_TYPE (size
);
7776 /* type_dependent_expression_p? */
7777 if (!dependent_type_p (type
))
7779 mark_rvalue_use (size
);
7781 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
7782 && TREE_SIDE_EFFECTS (size
))
7783 /* In C++98, we mark a non-constant array bound with a magic
7784 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7787 size
= fold_non_dependent_expr (size
);
7789 if (CLASS_TYPE_P (type
)
7790 && CLASSTYPE_LITERAL_P (type
))
7792 size
= build_expr_type_conversion (WANT_INT
, size
, true);
7795 if (!(complain
& tf_error
))
7796 return error_mark_node
;
7798 error ("size of array %qD has non-integral type %qT",
7801 error ("size of array has non-integral type %qT", type
);
7802 size
= integer_one_node
;
7804 if (size
== error_mark_node
)
7805 return error_mark_node
;
7806 type
= TREE_TYPE (size
);
7807 /* We didn't support this case in GCC 3.2, so don't bother
7808 trying to model it now in ABI v1. */
7809 abi_1_itype
= error_mark_node
;
7812 size
= maybe_constant_value (size
);
7813 if (!TREE_CONSTANT (size
))
7817 if (error_operand_p (size
))
7818 return error_mark_node
;
7820 /* The array bound must be an integer type. */
7821 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
7823 if (!(complain
& tf_error
))
7824 return error_mark_node
;
7826 error ("size of array %qD has non-integral type %qT", name
, type
);
7828 error ("size of array has non-integral type %qT", type
);
7829 size
= integer_one_node
;
7830 type
= TREE_TYPE (size
);
7834 /* A type is dependent if it is...an array type constructed from any
7835 dependent type or whose size is specified by a constant expression
7836 that is value-dependent. */
7837 /* We can only call value_dependent_expression_p on integral constant
7838 expressions; treat non-constant expressions as dependent, too. */
7839 if (processing_template_decl
7840 && (dependent_type_p (type
)
7841 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
7843 /* We cannot do any checking for a SIZE that isn't known to be
7844 constant. Just build the index type and mark that it requires
7845 structural equality checks. */
7846 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7847 size
, integer_one_node
));
7848 TYPE_DEPENDENT_P (itype
) = 1;
7849 TYPE_DEPENDENT_P_VALID (itype
) = 1;
7850 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7854 if (!abi_version_at_least (2) && processing_template_decl
7855 && abi_1_itype
== NULL_TREE
)
7856 /* For abi-1, we handled all instances in templates the same way,
7857 even when they were non-dependent. This affects the manglings
7858 produced. So, we do the normal checking for non-dependent
7859 sizes, but at the end we'll return the same type that abi-1
7860 would have, but with TYPE_CANONICAL set to the "right"
7861 value that the current ABI would provide. */
7862 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7863 osize
, integer_one_node
));
7865 /* Normally, the array-bound will be a constant. */
7866 if (TREE_CODE (size
) == INTEGER_CST
)
7868 /* Check to see if the array bound overflowed. Make that an
7869 error, no matter how generous we're being. */
7870 constant_expression_error (size
);
7872 /* An array must have a positive number of elements. */
7873 if (INT_CST_LT (size
, integer_zero_node
))
7875 if (!(complain
& tf_error
))
7876 return error_mark_node
;
7878 error ("size of array %qD is negative", name
);
7880 error ("size of array is negative");
7881 size
= integer_one_node
;
7883 /* As an extension we allow zero-sized arrays. */
7884 else if (integer_zerop (size
))
7886 if (!(complain
& tf_error
))
7887 /* We must fail if performing argument deduction (as
7888 indicated by the state of complain), so that
7889 another substitution can be found. */
7890 return error_mark_node
;
7891 else if (in_system_header
)
7892 /* Allow them in system headers because glibc uses them. */;
7894 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array %qD", name
);
7896 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array");
7899 else if (TREE_CONSTANT (size
)
7900 /* We don't allow VLAs at non-function scopes, or during
7901 tentative template substitution. */
7902 || !at_function_scope_p () || !(complain
& tf_error
))
7904 if (!(complain
& tf_error
))
7905 return error_mark_node
;
7906 /* `(int) &fn' is not a valid array bound. */
7908 error ("size of array %qD is not an integral constant-expression",
7911 error ("size of array is not an integral constant-expression");
7912 size
= integer_one_node
;
7914 else if (pedantic
&& warn_vla
!= 0)
7917 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
7919 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
7921 else if (warn_vla
> 0)
7925 "variable length array %qD is used", name
);
7928 "variable length array is used");
7931 if (processing_template_decl
&& !TREE_CONSTANT (size
))
7932 /* A variable sized array. */
7933 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
7936 HOST_WIDE_INT saved_processing_template_decl
;
7938 /* Compute the index of the largest element in the array. It is
7939 one less than the number of elements in the array. We save
7940 and restore PROCESSING_TEMPLATE_DECL so that computations in
7941 cp_build_binary_op will be appropriately folded. */
7942 saved_processing_template_decl
= processing_template_decl
;
7943 processing_template_decl
= 0;
7944 itype
= cp_build_binary_op (input_location
,
7946 cp_convert (ssizetype
, size
),
7947 cp_convert (ssizetype
, integer_one_node
),
7948 tf_warning_or_error
);
7949 itype
= fold (itype
);
7950 processing_template_decl
= saved_processing_template_decl
;
7952 if (!TREE_CONSTANT (itype
))
7953 /* A variable sized array. */
7954 itype
= variable_size (itype
);
7955 /* Make sure that there was no overflow when creating to a signed
7956 index type. (For example, on a 32-bit machine, an array with
7957 size 2^32 - 1 is too big.) */
7958 else if (TREE_CODE (itype
) == INTEGER_CST
7959 && TREE_OVERFLOW (itype
))
7961 if (!(complain
& tf_error
))
7962 return error_mark_node
;
7963 error ("overflow in array dimension");
7964 TREE_OVERFLOW (itype
) = 0;
7968 /* Create and return the appropriate index type. */
7969 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
7971 tree t
= build_index_type (itype
);
7972 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
7973 itype
= abi_1_itype
;
7976 itype
= build_index_type (itype
);
7978 /* If the index type were dependent, we would have returned early, so
7979 remember that it isn't. */
7980 TYPE_DEPENDENT_P (itype
) = 0;
7981 TYPE_DEPENDENT_P_VALID (itype
) = 1;
7985 /* Returns the scope (if any) in which the entity declared by
7986 DECLARATOR will be located. If the entity was declared with an
7987 unqualified name, NULL_TREE is returned. */
7990 get_scope_of_declarator (const cp_declarator
*declarator
)
7992 while (declarator
&& declarator
->kind
!= cdk_id
)
7993 declarator
= declarator
->declarator
;
7995 /* If the declarator-id is a SCOPE_REF, the scope in which the
7996 declaration occurs is the first operand. */
7998 && declarator
->u
.id
.qualifying_scope
)
7999 return declarator
->u
.id
.qualifying_scope
;
8001 /* Otherwise, the declarator is not a qualified name; the entity will
8002 be declared in the current scope. */
8006 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8007 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8011 create_array_type_for_decl (tree name
, tree type
, tree size
)
8013 tree itype
= NULL_TREE
;
8015 /* If things have already gone awry, bail now. */
8016 if (type
== error_mark_node
|| size
== error_mark_node
)
8017 return error_mark_node
;
8019 /* 8.3.4/1: If the type of the identifier of D contains the auto
8020 type-specifier, the program is ill-formed. */
8021 if (pedantic
&& type_uses_auto (type
))
8022 pedwarn (input_location
, OPT_pedantic
,
8023 "declaration of %qD as array of %<auto%>", name
);
8025 /* If there are some types which cannot be array elements,
8026 issue an error-message and return. */
8027 switch (TREE_CODE (type
))
8031 error ("declaration of %qD as array of void", name
);
8033 error ("creating array of void");
8034 return error_mark_node
;
8038 error ("declaration of %qD as array of functions", name
);
8040 error ("creating array of functions");
8041 return error_mark_node
;
8043 case REFERENCE_TYPE
:
8045 error ("declaration of %qD as array of references", name
);
8047 error ("creating array of references");
8048 return error_mark_node
;
8052 error ("declaration of %qD as array of function members", name
);
8054 error ("creating array of function members");
8055 return error_mark_node
;
8063 The constant expressions that specify the bounds of the arrays
8064 can be omitted only for the first member of the sequence. */
8065 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8068 error ("declaration of %qD as multidimensional array must "
8069 "have bounds for all dimensions except the first",
8072 error ("multidimensional array must have bounds for all "
8073 "dimensions except the first");
8075 return error_mark_node
;
8078 /* Figure out the index type for the array. */
8080 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8083 T is called the array element type; this type shall not be [...] an
8084 abstract class type. */
8085 abstract_virtuals_error (name
, type
);
8087 return build_cplus_array_type (type
, itype
);
8090 /* Check that it's OK to declare a function with the indicated TYPE.
8091 SFK indicates the kind of special function (if any) that this
8092 function is. OPTYPE is the type given in a conversion operator
8093 declaration, or the class type for a constructor/destructor.
8094 Returns the actual return type of the function; that
8095 may be different than TYPE if an error occurs, or for certain
8096 special functions. */
8099 check_special_function_return_type (special_function_kind sfk
,
8105 case sfk_constructor
:
8107 error ("return type specification for constructor invalid");
8109 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8110 type
= build_pointer_type (optype
);
8112 type
= void_type_node
;
8115 case sfk_destructor
:
8117 error ("return type specification for destructor invalid");
8118 /* We can't use the proper return type here because we run into
8119 problems with ambiguous bases and covariant returns.
8120 Java classes are left unchanged because (void *) isn't a valid
8121 Java type, and we don't want to change the Java ABI. */
8122 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8123 type
= build_pointer_type (void_type_node
);
8125 type
= void_type_node
;
8128 case sfk_conversion
:
8130 error ("return type specified for %<operator %T%>", optype
);
8141 /* A variable or data member (whose unqualified name is IDENTIFIER)
8142 has been declared with the indicated TYPE. If the TYPE is not
8143 acceptable, issue an error message and return a type to use for
8144 error-recovery purposes. */
8147 check_var_type (tree identifier
, tree type
)
8149 if (VOID_TYPE_P (type
))
8152 error ("unnamed variable or field declared void");
8153 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
8155 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8156 error ("variable or field %qE declared void", identifier
);
8159 error ("variable or field declared void");
8160 type
= error_mark_node
;
8166 /* Given declspecs and a declarator (abstract or otherwise), determine
8167 the name and type of the object declared and construct a DECL node
8170 DECLSPECS points to the representation of declaration-specifier
8171 sequence that precedes declarator.
8173 DECL_CONTEXT says which syntactic context this declaration is in:
8174 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8175 FUNCDEF for a function definition. Like NORMAL but a few different
8176 error messages in each case. Return value may be zero meaning
8177 this definition is too screwy to try to parse.
8178 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8179 handle member functions (which have FIELD context).
8180 Return value may be zero meaning this definition is too screwy to
8182 PARM for a parameter declaration (either within a function prototype
8183 or before a function body). Make a PARM_DECL, or return void_type_node.
8184 TPARM for a template parameter declaration.
8185 CATCHPARM for a parameter declaration before a catch clause.
8186 TYPENAME if for a typename (in a cast or sizeof).
8187 Don't make a DECL node; just return the ..._TYPE node.
8188 FIELD for a struct or union field; make a FIELD_DECL.
8189 BITFIELD for a field with specified width.
8191 INITIALIZED is as for start_decl.
8193 ATTRLIST is a pointer to the list of attributes, which may be NULL
8194 if there are none; *ATTRLIST may be modified if attributes from inside
8195 the declarator should be applied to the declaration.
8197 When this function is called, scoping variables (such as
8198 CURRENT_CLASS_TYPE) should reflect the scope in which the
8199 declaration occurs, not the scope in which the new declaration will
8200 be placed. For example, on:
8204 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8207 Returns a DECL (if a declarator is present), a TYPE (if there is no
8208 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8212 grokdeclarator (const cp_declarator
*declarator
,
8213 const cp_decl_specifier_seq
*declspecs
,
8214 enum decl_context decl_context
,
8218 tree type
= NULL_TREE
;
8220 int explicit_int128
= 0;
8221 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8222 int explicit_int
= 0;
8223 int explicit_char
= 0;
8224 int defaulted_int
= 0;
8225 tree dependent_name
= NULL_TREE
;
8227 tree typedef_decl
= NULL_TREE
;
8228 const char *name
= NULL
;
8229 tree typedef_type
= NULL_TREE
;
8230 /* True if this declarator is a function definition. */
8231 bool funcdef_flag
= false;
8232 cp_declarator_kind innermost_code
= cdk_error
;
8235 /* See the code below that used this. */
8236 tree decl_attr
= NULL_TREE
;
8239 /* Keep track of what sort of function is being processed
8240 so that we can warn about default return values, or explicit
8241 return values which do not match prescribed defaults. */
8242 special_function_kind sfk
= sfk_none
;
8244 tree dname
= NULL_TREE
;
8245 tree ctor_return_type
= NULL_TREE
;
8246 enum overload_flags flags
= NO_SPECIAL
;
8247 /* cv-qualifiers that apply to the declarator, for a declaration of
8248 a member function. */
8249 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8250 /* virt-specifiers that apply to the declarator, for a declaration of
8251 a member function. */
8252 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8253 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8255 tree raises
= NULL_TREE
;
8256 int template_count
= 0;
8257 tree returned_attrs
= NULL_TREE
;
8258 tree parms
= NULL_TREE
;
8259 const cp_declarator
*id_declarator
;
8260 /* The unqualified name of the declarator; either an
8261 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8262 tree unqualified_id
;
8263 /* The class type, if any, in which this entity is located,
8264 or NULL_TREE if none. Note that this value may be different from
8265 the current class type; for example if an attempt is made to declare
8266 "A::f" inside "B", this value will be "A". */
8267 tree ctype
= current_class_type
;
8268 /* The NAMESPACE_DECL for the namespace in which this entity is
8269 located. If an unqualified name is used to declare the entity,
8270 this value will be NULL_TREE, even if the entity is located at
8272 tree in_namespace
= NULL_TREE
;
8273 cp_storage_class storage_class
;
8274 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8275 bool type_was_error_mark_node
= false;
8276 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8277 bool template_type_arg
= false;
8278 bool template_parm_flag
= false;
8279 bool constexpr_p
= declspecs
->specs
[(int) ds_constexpr
];
8282 signed_p
= declspecs
->specs
[(int)ds_signed
];
8283 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
8284 short_p
= declspecs
->specs
[(int)ds_short
];
8285 long_p
= declspecs
->specs
[(int)ds_long
];
8286 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
8287 explicit_int128
= declspecs
->explicit_int128_p
;
8288 thread_p
= declspecs
->specs
[(int)ds_thread
];
8290 if (decl_context
== FUNCDEF
)
8291 funcdef_flag
= true, decl_context
= NORMAL
;
8292 else if (decl_context
== MEMFUNCDEF
)
8293 funcdef_flag
= true, decl_context
= FIELD
;
8294 else if (decl_context
== BITFIELD
)
8295 bitfield
= 1, decl_context
= FIELD
;
8296 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8297 template_type_arg
= true, decl_context
= TYPENAME
;
8298 else if (decl_context
== TPARM
)
8299 template_parm_flag
= true, decl_context
= PARM
;
8301 if (initialized
> 1)
8302 funcdef_flag
= true;
8304 /* Look inside a declarator for the name being declared
8305 and get it as a string, for an error message. */
8306 for (id_declarator
= declarator
;
8308 id_declarator
= id_declarator
->declarator
)
8310 if (id_declarator
->kind
!= cdk_id
)
8311 innermost_code
= id_declarator
->kind
;
8313 switch (id_declarator
->kind
)
8316 if (id_declarator
->declarator
8317 && id_declarator
->declarator
->kind
== cdk_id
)
8319 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8320 if (sfk
== sfk_destructor
)
8327 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8328 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8331 if (qualifying_scope
)
8333 if (at_function_scope_p ())
8337 A declarator-id shall not be qualified except
8340 None of the cases are permitted in block
8342 if (qualifying_scope
== global_namespace
)
8343 error ("invalid use of qualified-name %<::%D%>",
8345 else if (TYPE_P (qualifying_scope
))
8346 error ("invalid use of qualified-name %<%T::%D%>",
8347 qualifying_scope
, decl
);
8349 error ("invalid use of qualified-name %<%D::%D%>",
8350 qualifying_scope
, decl
);
8351 return error_mark_node
;
8353 else if (TYPE_P (qualifying_scope
))
8355 ctype
= qualifying_scope
;
8356 if (!MAYBE_CLASS_TYPE_P (ctype
))
8358 error ("%q#T is not a class or a namespace", ctype
);
8361 else if (innermost_code
!= cdk_function
8362 && current_class_type
8363 && !UNIQUELY_DERIVED_FROM_P (ctype
,
8364 current_class_type
))
8366 error ("type %qT is not derived from type %qT",
8367 ctype
, current_class_type
);
8368 return error_mark_node
;
8371 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8372 in_namespace
= qualifying_scope
;
8374 switch (TREE_CODE (decl
))
8380 if (innermost_code
!= cdk_function
)
8382 error ("declaration of %qD as non-function", decl
);
8383 return error_mark_node
;
8385 else if (!qualifying_scope
8386 && !(current_class_type
&& at_class_scope_p ()))
8388 error ("declaration of %qD as non-member", decl
);
8389 return error_mark_node
;
8392 type
= TREE_OPERAND (decl
, 0);
8394 type
= constructor_name (type
);
8395 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8400 case TEMPLATE_ID_EXPR
:
8402 tree fns
= TREE_OPERAND (decl
, 0);
8405 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
8407 gcc_assert (is_overloaded_fn (dname
));
8408 dname
= DECL_NAME (get_first_fn (dname
));
8413 case IDENTIFIER_NODE
:
8414 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
8417 if (C_IS_RESERVED_WORD (dname
))
8419 error ("declarator-id missing; using reserved word %qD",
8421 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8423 else if (!IDENTIFIER_TYPENAME_P (dname
))
8424 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8427 gcc_assert (flags
== NO_SPECIAL
);
8428 flags
= TYPENAME_FLAG
;
8429 ctor_return_type
= TREE_TYPE (dname
);
8430 sfk
= sfk_conversion
;
8431 if (is_typename_at_global_scope (dname
))
8432 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8434 name
= "<invalid operator>";
8451 return error_mark_node
;
8456 if (id_declarator
->kind
== cdk_id
)
8462 The declarator in a function-definition shall have the form
8463 D1 ( parameter-declaration-clause) ... */
8464 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8466 error ("function definition does not declare parameters");
8467 return error_mark_node
;
8470 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8471 && innermost_code
!= cdk_function
8472 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8474 error ("declaration of %qD as non-function", dname
);
8475 return error_mark_node
;
8478 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8480 if (declspecs
->specs
[(int)ds_typedef
])
8482 error ("declaration of %qD as %<typedef%>", dname
);
8483 return error_mark_node
;
8485 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8487 error ("declaration of %qD as parameter", dname
);
8488 return error_mark_node
;
8492 /* Anything declared one level down from the top level
8493 must be one of the parameters of a function
8494 (because the body is at least two levels down). */
8496 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8497 by not allowing C++ class definitions to specify their parameters
8498 with xdecls (must be spec.d in the parmlist).
8500 Since we now wait to push a class scope until we are sure that
8501 we are in a legitimate method context, we must set oldcname
8502 explicitly (since current_class_name is not yet alive).
8504 We also want to avoid calling this a PARM if it is in a namespace. */
8506 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8508 cp_binding_level
*b
= current_binding_level
;
8509 current_binding_level
= b
->level_chain
;
8510 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8511 decl_context
= PARM
;
8512 current_binding_level
= b
;
8516 name
= decl_context
== PARM
? "parameter" : "type name";
8518 if (constexpr_p
&& declspecs
->specs
[(int)ds_typedef
])
8520 error ("%<constexpr%> cannot appear in a typedef declaration");
8521 return error_mark_node
;
8524 /* If there were multiple types specified in the decl-specifier-seq,
8525 issue an error message. */
8526 if (declspecs
->multiple_types_p
)
8528 error ("two or more data types in declaration of %qs", name
);
8529 return error_mark_node
;
8532 if (declspecs
->conflicting_specifiers_p
)
8534 error ("conflicting specifiers in declaration of %qs", name
);
8535 return error_mark_node
;
8538 /* Extract the basic type from the decl-specifier-seq. */
8539 type
= declspecs
->type
;
8540 if (type
== error_mark_node
)
8543 type_was_error_mark_node
= true;
8545 /* If the entire declaration is itself tagged as deprecated then
8546 suppress reports of deprecated items. */
8547 if (type
&& TREE_DEPRECATED (type
)
8548 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8549 warn_deprecated_use (type
, NULL_TREE
);
8550 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8552 typedef_decl
= type
;
8553 type
= TREE_TYPE (typedef_decl
);
8554 if (TREE_DEPRECATED (type
)
8555 && DECL_ARTIFICIAL (typedef_decl
)
8556 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8557 warn_deprecated_use (type
, NULL_TREE
);
8559 /* No type at all: default to `int', and set DEFAULTED_INT
8560 because it was not a user-defined typedef. */
8561 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8563 /* These imply 'int'. */
8564 type
= integer_type_node
;
8568 explicit_int
= declspecs
->explicit_int_p
;
8569 explicit_char
= declspecs
->explicit_char_p
;
8572 /* See the code below that used this. */
8574 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
8576 typedef_type
= type
;
8579 if (sfk
!= sfk_conversion
)
8580 ctor_return_type
= ctype
;
8582 if (sfk
!= sfk_none
)
8583 type
= check_special_function_return_type (sfk
, type
,
8585 else if (type
== NULL_TREE
)
8591 /* We handle `main' specially here, because 'main () { }' is so
8592 common. With no options, it is allowed. With -Wreturn-type,
8593 it is a warning. It is only an error with -pedantic-errors. */
8594 is_main
= (funcdef_flag
8595 && dname
&& TREE_CODE (dname
) == IDENTIFIER_NODE
8596 && MAIN_NAME_P (dname
)
8597 && ctype
== NULL_TREE
8598 && in_namespace
== NULL_TREE
8599 && current_namespace
== global_namespace
);
8601 if (type_was_error_mark_node
)
8602 /* We've already issued an error, don't complain more. */;
8603 else if (in_system_header
|| flag_ms_extensions
)
8604 /* Allow it, sigh. */;
8606 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
8608 pedwarn (input_location
, OPT_pedantic
,
8609 "ISO C++ forbids declaration of %qs with no type", name
);
8611 warning (OPT_Wreturn_type
,
8612 "ISO C++ forbids declaration of %qs with no type", name
);
8614 type
= integer_type_node
;
8619 /* Now process the modifiers that were specified
8620 and check for invalid combinations. */
8622 /* Long double is a special combination. */
8623 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
8626 type
= cp_build_qualified_type (long_double_type_node
,
8627 cp_type_quals (type
));
8630 /* Check all other uses of type modifiers. */
8632 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
8636 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8637 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8638 else if (signed_p
&& unsigned_p
)
8639 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
8640 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
8641 error ("%<long long%> invalid for %qs", name
);
8642 else if (explicit_int128
&& TREE_CODE (type
) != INTEGER_TYPE
)
8643 error ("%<__int128%> invalid for %qs", name
);
8644 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
8645 error ("%<long%> invalid for %qs", name
);
8646 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
8647 error ("%<short%> invalid for %qs", name
);
8648 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8649 error ("%<long%> or %<short%> invalid for %qs", name
);
8650 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
8651 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
8652 else if ((long_p
|| short_p
) && explicit_char
)
8653 error ("%<long%> or %<short%> specified with char for %qs", name
);
8654 else if (long_p
&& short_p
)
8655 error ("%<long%> and %<short%> specified together for %qs", name
);
8656 else if (type
== char16_type_node
|| type
== char32_type_node
)
8658 if (signed_p
|| unsigned_p
)
8659 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8660 else if (short_p
|| long_p
)
8661 error ("%<short%> or %<long%> invalid for %qs", name
);
8666 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
8668 pedwarn (input_location
, OPT_pedantic
,
8669 "long, short, signed or unsigned used invalidly for %qs",
8671 if (flag_pedantic_errors
)
8674 if (explicit_int128
)
8676 if (int128_integer_type_node
== NULL_TREE
)
8678 error ("%<__int128%> is not supported by this target");
8683 pedwarn (input_location
, OPT_pedantic
,
8684 "ISO C++ does not support %<__int128%> for %qs",
8686 if (flag_pedantic_errors
)
8692 /* Discard the type modifiers if they are invalid. */
8700 explicit_int128
= false;
8704 /* Decide whether an integer type is signed or not.
8705 Optionally treat bitfields as signed by default. */
8709 It is implementation-defined whether a plain (neither
8710 explicitly signed or unsigned) char, short, int, or long
8711 bit-field is signed or unsigned.
8713 Naturally, we extend this to long long as well. Note that
8714 this does not include wchar_t. */
8715 || (bitfield
&& !flag_signed_bitfields
8717 /* A typedef for plain `int' without `signed' can be
8718 controlled just like plain `int', but a typedef for
8719 `signed int' cannot be so controlled. */
8721 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
8722 && TREE_CODE (type
) == INTEGER_TYPE
8723 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
8725 if (explicit_int128
)
8726 type
= int128_unsigned_type_node
;
8728 type
= long_long_unsigned_type_node
;
8730 type
= long_unsigned_type_node
;
8732 type
= short_unsigned_type_node
;
8733 else if (type
== char_type_node
)
8734 type
= unsigned_char_type_node
;
8735 else if (typedef_decl
)
8736 type
= unsigned_type_for (type
);
8738 type
= unsigned_type_node
;
8740 else if (signed_p
&& type
== char_type_node
)
8741 type
= signed_char_type_node
;
8742 else if (explicit_int128
)
8743 type
= int128_integer_type_node
;
8745 type
= long_long_integer_type_node
;
8747 type
= long_integer_type_node
;
8749 type
= short_integer_type_node
;
8751 if (declspecs
->specs
[(int)ds_complex
])
8753 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
8754 error ("complex invalid for %qs", name
);
8755 /* If we just have "complex", it is equivalent to
8756 "complex double", but if any modifiers at all are specified it is
8757 the complex form of TYPE. E.g, "complex short" is
8758 "complex short int". */
8759 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
8760 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
8761 type
= complex_double_type_node
;
8762 else if (type
== integer_type_node
)
8763 type
= complex_integer_type_node
;
8764 else if (type
== float_type_node
)
8765 type
= complex_float_type_node
;
8766 else if (type
== double_type_node
)
8767 type
= complex_double_type_node
;
8768 else if (type
== long_double_type_node
)
8769 type
= complex_long_double_type_node
;
8771 type
= build_complex_type (type
);
8774 type_quals
= TYPE_UNQUALIFIED
;
8775 if (declspecs
->specs
[(int)ds_const
])
8776 type_quals
|= TYPE_QUAL_CONST
;
8777 if (declspecs
->specs
[(int)ds_volatile
])
8778 type_quals
|= TYPE_QUAL_VOLATILE
;
8779 if (declspecs
->specs
[(int)ds_restrict
])
8780 type_quals
|= TYPE_QUAL_RESTRICT
;
8781 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
8782 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8785 type_quals
|= cp_type_quals (type
);
8786 type
= cp_build_qualified_type_real
8787 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
8788 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
8789 /* We might have ignored or rejected some of the qualifiers. */
8790 type_quals
= cp_type_quals (type
);
8793 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
8794 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
8795 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
8797 storage_class
= declspecs
->storage_class
;
8798 if (storage_class
== sc_static
)
8799 staticp
= 1 + (decl_context
== FIELD
);
8801 if (virtualp
&& staticp
== 2)
8803 error ("member %qD cannot be declared both virtual and static", dname
);
8804 storage_class
= sc_none
;
8807 friendp
= !! declspecs
->specs
[(int)ds_friend
];
8809 if (dependent_name
&& !friendp
)
8811 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
8812 return error_mark_node
;
8815 /* Issue errors about use of storage classes for parameters. */
8816 if (decl_context
== PARM
)
8818 if (declspecs
->specs
[(int)ds_typedef
])
8820 error ("typedef declaration invalid in parameter declaration");
8821 return error_mark_node
;
8823 else if (template_parm_flag
&& storage_class
!= sc_none
)
8825 error ("storage class specified for template parameter %qs", name
);
8826 return error_mark_node
;
8828 else if (storage_class
== sc_static
8829 || storage_class
== sc_extern
8831 error ("storage class specifiers invalid in parameter declarations");
8833 /* Function parameters cannot be constexpr. If we saw one, moan
8834 and pretend it wasn't there. */
8837 error ("a parameter cannot be declared %<constexpr%>");
8842 /* Give error if `virtual' is used outside of class declaration. */
8844 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
8846 error ("%<virtual%> outside class declaration");
8850 /* Static anonymous unions are dealt with here. */
8851 if (staticp
&& decl_context
== TYPENAME
8853 && ANON_AGGR_TYPE_P (declspecs
->type
))
8854 decl_context
= FIELD
;
8856 /* Warn about storage classes that are invalid for certain
8857 kinds of declarations (parameters, typenames, etc.). */
8860 && storage_class
!= sc_extern
8861 && storage_class
!= sc_static
)
8862 || declspecs
->specs
[(int)ds_typedef
]))
8864 error ("multiple storage classes in declaration of %qs", name
);
8867 if (decl_context
!= NORMAL
8868 && ((storage_class
!= sc_none
8869 && storage_class
!= sc_mutable
)
8872 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
8873 && (storage_class
== sc_register
8874 || storage_class
== sc_auto
))
8876 else if (declspecs
->specs
[(int)ds_typedef
])
8878 else if (decl_context
== FIELD
8879 /* C++ allows static class elements. */
8880 && storage_class
== sc_static
)
8881 /* C++ also allows inlines and signed and unsigned elements,
8882 but in those cases we don't come in here. */
8886 if (decl_context
== FIELD
)
8887 error ("storage class specified for %qs", name
);
8890 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8891 error ("storage class specified for parameter %qs", name
);
8893 error ("storage class specified for typename");
8895 if (storage_class
== sc_register
8896 || storage_class
== sc_auto
8897 || storage_class
== sc_extern
8899 storage_class
= sc_none
;
8902 else if (storage_class
== sc_extern
&& funcdef_flag
8903 && ! toplevel_bindings_p ())
8904 error ("nested function %qs declared %<extern%>", name
);
8905 else if (toplevel_bindings_p ())
8907 if (storage_class
== sc_auto
)
8908 error ("top-level declaration of %qs specifies %<auto%>", name
);
8911 && storage_class
!= sc_extern
8912 && storage_class
!= sc_static
)
8914 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8919 if (storage_class
&& friendp
)
8921 error ("storage class specifiers invalid in friend function declarations");
8922 storage_class
= sc_none
;
8927 unqualified_id
= NULL_TREE
;
8930 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
8931 switch (TREE_CODE (unqualified_id
))
8934 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
8935 if (TYPE_P (unqualified_id
))
8936 unqualified_id
= constructor_name (unqualified_id
);
8939 case IDENTIFIER_NODE
:
8940 case TEMPLATE_ID_EXPR
:
8948 /* Determine the type of the entity declared by recurring on the
8950 for (; declarator
; declarator
= declarator
->declarator
)
8952 const cp_declarator
*inner_declarator
;
8955 if (type
== error_mark_node
)
8956 return error_mark_node
;
8958 attrs
= declarator
->attributes
;
8964 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
8965 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
8966 if (declarator
->kind
== cdk_function
)
8967 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
8968 if (declarator
->kind
== cdk_array
)
8969 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
8970 returned_attrs
= decl_attributes (&type
,
8971 chainon (returned_attrs
, attrs
),
8975 if (declarator
->kind
== cdk_id
)
8978 inner_declarator
= declarator
->declarator
;
8980 switch (declarator
->kind
)
8983 type
= create_array_type_for_decl (dname
, type
,
8984 declarator
->u
.array
.bounds
);
8992 /* Declaring a function type.
8993 Make sure we have a valid type for the function to return. */
8995 if (type_quals
!= TYPE_UNQUALIFIED
)
8997 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
8998 warning (OPT_Wignored_qualifiers
,
8999 "type qualifiers ignored on function return type");
9000 /* We now know that the TYPE_QUALS don't apply to the
9001 decl, but to its return type. */
9002 type_quals
= TYPE_UNQUALIFIED
;
9004 errmsg
= targetm
.invalid_return_type (type
);
9008 type
= integer_type_node
;
9011 /* Error about some types functions can't return. */
9013 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9015 error ("%qs declared as function returning a function", name
);
9016 return error_mark_node
;
9018 if (TREE_CODE (type
) == ARRAY_TYPE
)
9020 error ("%qs declared as function returning an array", name
);
9021 return error_mark_node
;
9024 /* Pick up type qualifiers which should be applied to `this'. */
9025 memfn_quals
= declarator
->u
.function
.qualifiers
;
9026 /* Pick up virt-specifiers. */
9027 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9028 /* Pick up the exception specifications. */
9029 raises
= declarator
->u
.function
.exception_specification
;
9031 /* Say it's a definition only for the CALL_EXPR
9032 closest to the identifier. */
9033 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9035 /* Handle a late-specified return type. */
9038 if (type_uses_auto (type
))
9040 if (!declarator
->u
.function
.late_return_type
)
9042 error ("%qs function uses %<auto%> type specifier without"
9043 " late return type", name
);
9044 return error_mark_node
;
9046 else if (!is_auto (type
))
9048 error ("%qs function with late return type has"
9049 " %qT as its type rather than plain %<auto%>",
9051 return error_mark_node
;
9054 else if (declarator
->u
.function
.late_return_type
)
9056 error ("%qs function with late return type not declared"
9057 " with %<auto%> type specifier", name
);
9058 return error_mark_node
;
9061 type
= splice_late_return_type
9062 (type
, declarator
->u
.function
.late_return_type
);
9063 if (type
== error_mark_node
)
9064 return error_mark_node
;
9066 if (ctype
== NULL_TREE
9067 && decl_context
== FIELD
9069 && (friendp
== 0 || dname
== current_class_name
))
9070 ctype
= current_class_type
;
9072 if (ctype
&& (sfk
== sfk_constructor
9073 || sfk
== sfk_destructor
))
9075 /* We are within a class's scope. If our declarator name
9076 is the same as the class name, and we are defining
9077 a function, then it is a constructor/destructor, and
9078 therefore returns a void type. */
9080 /* ISO C++ 12.4/2. A destructor may not be declared
9081 const or volatile. A destructor may not be
9084 ISO C++ 12.1. A constructor may not be declared
9085 const or volatile. A constructor may not be
9086 virtual. A constructor may not be static. */
9088 error ((flags
== DTOR_FLAG
)
9089 ? "destructor cannot be static member function"
9090 : "constructor cannot be static member function");
9093 error ((flags
== DTOR_FLAG
)
9094 ? "destructors may not be cv-qualified"
9095 : "constructors may not be cv-qualified");
9096 memfn_quals
= TYPE_UNQUALIFIED
;
9099 if (decl_context
== FIELD
9100 && !member_function_or_else (ctype
,
9103 return error_mark_node
;
9105 if (flags
!= DTOR_FLAG
)
9107 /* It's a constructor. */
9112 permerror (input_location
, "constructors cannot be declared virtual");
9115 if (decl_context
== FIELD
9116 && sfk
!= sfk_constructor
)
9117 return error_mark_node
;
9119 if (decl_context
== FIELD
)
9125 error ("can%'t initialize friend function %qs", name
);
9128 /* Cannot be both friend and virtual. */
9129 error ("virtual functions cannot be friends");
9132 if (decl_context
== NORMAL
)
9133 error ("friend declaration not in class definition");
9134 if (current_function_decl
&& funcdef_flag
)
9135 error ("can%'t define friend function %qs in a local "
9139 else if (ctype
&& sfk
== sfk_conversion
)
9143 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9148 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9151 if (inner_declarator
9152 && inner_declarator
->kind
== cdk_id
9153 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9154 && arg_types
!= void_list_node
)
9156 error ("destructors may not have parameters");
9157 arg_types
= void_list_node
;
9161 type
= build_function_type (type
, arg_types
);
9168 /* Filter out pointers-to-references and references-to-references.
9169 We can get these if a TYPE_DECL is used. */
9171 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9173 if (declarator
->kind
!= cdk_reference
)
9175 error ("cannot declare pointer to %q#T", type
);
9176 type
= TREE_TYPE (type
);
9179 /* In C++0x, we allow reference to reference declarations
9180 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9181 and template type arguments [14.3.1/4 temp.arg.type]. The
9182 check for direct reference to reference declarations, which
9183 are still forbidden, occurs below. Reasoning behind the change
9184 can be found in DR106, DR540, and the rvalue reference
9186 else if (cxx_dialect
== cxx98
)
9188 error ("cannot declare reference to %q#T", type
);
9189 type
= TREE_TYPE (type
);
9192 else if (VOID_TYPE_P (type
))
9194 if (declarator
->kind
== cdk_reference
)
9195 error ("cannot declare reference to %q#T", type
);
9196 else if (declarator
->kind
== cdk_ptrmem
)
9197 error ("cannot declare pointer to %q#T member", type
);
9200 /* We now know that the TYPE_QUALS don't apply to the decl,
9201 but to the target of the pointer. */
9202 type_quals
= TYPE_UNQUALIFIED
;
9204 if (declarator
->kind
== cdk_ptrmem
9205 && (TREE_CODE (type
) == FUNCTION_TYPE
9206 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
9208 memfn_quals
|= type_memfn_quals (type
);
9209 type
= build_memfn_type (type
,
9210 declarator
->u
.pointer
.class_type
,
9212 if (type
== error_mark_node
)
9213 return error_mark_node
;
9214 memfn_quals
= TYPE_UNQUALIFIED
;
9217 if (TREE_CODE (type
) == FUNCTION_TYPE
9218 && type_memfn_quals (type
) != TYPE_UNQUALIFIED
)
9219 error (declarator
->kind
== cdk_reference
9220 ? G_("cannot declare reference to qualified function type %qT")
9221 : G_("cannot declare pointer to qualified function type %qT"),
9224 /* When the pointed-to type involves components of variable size,
9225 care must be taken to ensure that the size evaluation code is
9226 emitted early enough to dominate all the possible later uses
9227 and late enough for the variables on which it depends to have
9230 This is expected to happen automatically when the pointed-to
9231 type has a name/declaration of it's own, but special attention
9232 is required if the type is anonymous.
9234 We handle the NORMAL and FIELD contexts here by inserting a
9235 dummy statement that just evaluates the size at a safe point
9236 and ensures it is not deferred until e.g. within a deeper
9237 conditional context (c++/43555).
9239 We expect nothing to be needed here for PARM or TYPENAME.
9240 Evaluating the size at this point for TYPENAME would
9241 actually be incorrect, as we might be in the middle of an
9242 expression with side effects on the pointed-to type size
9243 "arguments" prior to the pointer declaration point and the
9244 size evaluation could end up prior to the side effects. */
9246 if (!TYPE_NAME (type
)
9247 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9248 && at_function_scope_p ()
9249 && variably_modified_type_p (type
, NULL_TREE
))
9251 /* First break out any side-effects. */
9252 stabilize_vla_size (TYPE_SIZE (type
));
9253 /* And then force evaluation of the SAVE_EXPR. */
9254 finish_expr_stmt (TYPE_SIZE (type
));
9257 if (declarator
->kind
== cdk_reference
)
9259 /* In C++0x, the type we are creating a reference to might be
9260 a typedef which is itself a reference type. In that case,
9261 we follow the reference collapsing rules in
9262 [7.1.3/8 dcl.typedef] to create the final reference type:
9264 "If a typedef TD names a type that is a reference to a type
9265 T, an attempt to create the type 'lvalue reference to cv TD'
9266 creates the type 'lvalue reference to T,' while an attempt
9267 to create the type "rvalue reference to cv TD' creates the
9270 if (VOID_TYPE_P (type
))
9271 /* We already gave an error. */;
9272 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9274 if (declarator
->u
.reference
.rvalue_ref
)
9275 /* Leave type alone. */;
9277 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9280 type
= cp_build_reference_type
9281 (type
, declarator
->u
.reference
.rvalue_ref
);
9283 /* In C++0x, we need this check for direct reference to
9284 reference declarations, which are forbidden by
9285 [8.3.2/5 dcl.ref]. Reference to reference declarations
9286 are only allowed indirectly through typedefs and template
9287 type arguments. Example:
9289 void foo(int & &); // invalid ref-to-ref decl
9291 typedef int & int_ref;
9292 void foo(int_ref &); // valid ref-to-ref decl
9294 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9295 error ("cannot declare reference to %q#T, which is not "
9296 "a typedef or a template type argument", type
);
9298 else if (TREE_CODE (type
) == METHOD_TYPE
)
9299 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9300 else if (declarator
->kind
== cdk_ptrmem
)
9302 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9304 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9305 /* We will already have complained. */
9306 type
= error_mark_node
;
9308 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9312 type
= build_pointer_type (type
);
9314 /* Process a list of type modifier keywords (such as
9315 const or volatile) that were given inside the `*' or `&'. */
9317 if (declarator
->u
.pointer
.qualifiers
)
9320 = cp_build_qualified_type (type
,
9321 declarator
->u
.pointer
.qualifiers
);
9322 type_quals
= cp_type_quals (type
);
9335 /* We need to stabilize side-effects in VLA sizes for regular array
9336 declarations too, not just pointers to arrays. */
9337 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9338 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9339 && at_function_scope_p ()
9340 && variably_modified_type_p (type
, NULL_TREE
))
9341 stabilize_vla_size (TYPE_SIZE (type
));
9343 /* A `constexpr' specifier used in an object declaration declares
9344 the object as `const'. */
9345 if (constexpr_p
&& innermost_code
!= cdk_function
)
9347 if (type_quals
& TYPE_QUAL_CONST
)
9348 error ("both %<const%> and %<constexpr%> cannot be used here");
9349 if (type_quals
& TYPE_QUAL_VOLATILE
)
9350 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9351 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9353 type_quals
|= TYPE_QUAL_CONST
;
9354 type
= cp_build_qualified_type (type
, type_quals
);
9358 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9359 && TREE_CODE (type
) != FUNCTION_TYPE
9360 && TREE_CODE (type
) != METHOD_TYPE
)
9362 error ("template-id %qD used as a declarator",
9364 unqualified_id
= dname
;
9367 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9368 qualified with a class-name, turn it into a METHOD_TYPE, unless
9369 we know that the function is static. We take advantage of this
9370 opportunity to do other processing that pertains to entities
9371 explicitly declared to be class members. Note that if DECLARATOR
9372 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9373 would not have exited the loop above. */
9375 && declarator
->u
.id
.qualifying_scope
9376 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9380 ctype
= declarator
->u
.id
.qualifying_scope
;
9381 ctype
= TYPE_MAIN_VARIANT (ctype
);
9383 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
9385 /* You're supposed to have one `template <...>' for every
9386 template class, but you don't need one for a full
9387 specialization. For example:
9389 template <class T> struct S{};
9390 template <> struct S<int> { void f(); };
9391 void S<int>::f () {}
9393 is correct; there shouldn't be a `template <>' for the
9394 definition of `S<int>::f'. */
9395 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
9396 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
9397 /* T is an explicit (not partial) specialization. All
9398 containing classes must therefore also be explicitly
9401 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
9402 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
9403 template_count
+= 1;
9405 t
= TYPE_MAIN_DECL (t
);
9406 t
= DECL_CONTEXT (t
);
9409 if (ctype
== current_class_type
)
9413 permerror (input_location
, "member functions are implicitly friends of their class");
9417 permerror (declarator
->id_loc
,
9418 "extra qualification %<%T::%> on member %qs",
9421 else if (/* If the qualifying type is already complete, then we
9422 can skip the following checks. */
9423 !COMPLETE_TYPE_P (ctype
)
9424 && (/* If the function is being defined, then
9425 qualifying type must certainly be complete. */
9427 /* A friend declaration of "T::f" is OK, even if
9428 "T" is a template parameter. But, if this
9429 function is not a friend, the qualifying type
9431 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9432 /* For a declaration, the type need not be
9433 complete, if either it is dependent (since there
9434 is no meaningful definition of complete in that
9435 case) or the qualifying class is currently being
9437 || !(dependent_type_p (ctype
)
9438 || currently_open_class (ctype
)))
9439 /* Check that the qualifying type is complete. */
9440 && !complete_type_or_else (ctype
, NULL_TREE
))
9441 return error_mark_node
;
9442 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9444 if (current_class_type
9445 && (!friendp
|| funcdef_flag
))
9448 ? "cannot define member function %<%T::%s%> within %<%T%>"
9449 : "cannot declare member function %<%T::%s%> within %<%T%>",
9450 ctype
, name
, current_class_type
);
9451 return error_mark_node
;
9454 else if (declspecs
->specs
[(int)ds_typedef
]
9455 && current_class_type
)
9457 error ("cannot declare member %<%T::%s%> within %qT",
9458 ctype
, name
, current_class_type
);
9459 return error_mark_node
;
9463 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9464 ctype
= current_class_type
;
9466 /* Now TYPE has the actual type. */
9471 *attrlist
= chainon (returned_attrs
, *attrlist
);
9473 attrlist
= &returned_attrs
;
9476 /* Handle parameter packs. */
9477 if (parameter_pack_p
)
9479 if (decl_context
== PARM
)
9480 /* Turn the type into a pack expansion.*/
9481 type
= make_pack_expansion (type
);
9483 error ("non-parameter %qs cannot be a parameter pack", name
);
9486 /* Did array size calculations overflow? */
9488 if (TREE_CODE (type
) == ARRAY_TYPE
9489 && COMPLETE_TYPE_P (type
)
9490 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9491 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
9493 error ("size of array %qs is too large", name
);
9494 /* If we proceed with the array type as it is, we'll eventually
9495 crash in tree_low_cst(). */
9496 type
= error_mark_node
;
9499 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9500 && !processing_template_decl
9501 && variably_modified_type_p (type
, NULL_TREE
))
9503 if (decl_context
== FIELD
)
9504 error ("data member may not have variably modified type %qT", type
);
9506 error ("parameter may not have variably modified type %qT", type
);
9507 type
= error_mark_node
;
9510 if (explicitp
== 1 || (explicitp
&& friendp
))
9512 /* [dcl.fct.spec] The explicit specifier shall only be used in
9513 declarations of constructors within a class definition. */
9514 error ("only declarations of constructors can be %<explicit%>");
9518 if (storage_class
== sc_mutable
)
9520 if (decl_context
!= FIELD
|| friendp
)
9522 error ("non-member %qs cannot be declared %<mutable%>", name
);
9523 storage_class
= sc_none
;
9525 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
9527 error ("non-object member %qs cannot be declared %<mutable%>", name
);
9528 storage_class
= sc_none
;
9530 else if (TREE_CODE (type
) == FUNCTION_TYPE
9531 || TREE_CODE (type
) == METHOD_TYPE
)
9533 error ("function %qs cannot be declared %<mutable%>", name
);
9534 storage_class
= sc_none
;
9538 error ("static %qs cannot be declared %<mutable%>", name
);
9539 storage_class
= sc_none
;
9541 else if (type_quals
& TYPE_QUAL_CONST
)
9543 error ("const %qs cannot be declared %<mutable%>", name
);
9544 storage_class
= sc_none
;
9546 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9548 permerror (input_location
, "reference %qs cannot be declared "
9549 "%<mutable%>", name
);
9550 storage_class
= sc_none
;
9554 /* If this is declaring a typedef name, return a TYPE_DECL. */
9555 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
9559 /* Note that the grammar rejects storage classes
9560 in typenames, fields or parameters. */
9561 if (current_lang_name
== lang_name_java
)
9562 TYPE_FOR_JAVA (type
) = 1;
9564 /* This declaration:
9566 typedef void f(int) const;
9568 declares a function type which is not a member of any
9569 particular class, but which is cv-qualified; for
9570 example "f S::*" declares a pointer to a const-qualified
9571 member function of S. We record the cv-qualification in the
9573 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9575 type
= apply_memfn_quals (type
, memfn_quals
);
9577 /* We have now dealt with these qualifiers. */
9578 memfn_quals
= TYPE_UNQUALIFIED
;
9581 if (type_uses_auto (type
))
9583 error ("typedef declared %<auto%>");
9584 type
= error_mark_node
;
9587 if (decl_context
== FIELD
)
9588 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
9590 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
9591 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
9592 error_at (DECL_SOURCE_LOCATION (decl
),
9593 "typedef name may not be a nested-name-specifier");
9594 TREE_TYPE (decl
) = error_mark_node
;
9597 if (decl_context
!= FIELD
)
9599 if (!current_function_decl
)
9600 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
9601 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
9602 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9603 (current_function_decl
)))
9604 /* The TYPE_DECL is "abstract" because there will be
9605 clones of this constructor/destructor, and there will
9606 be copies of this TYPE_DECL generated in those
9608 DECL_ABSTRACT (decl
) = 1;
9610 else if (constructor_name_p (unqualified_id
, current_class_type
))
9611 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
9612 "as enclosing class",
9615 /* If the user declares "typedef struct {...} foo" then the
9616 struct will have an anonymous name. Fill that name in now.
9617 Nothing can refer to it, so nothing needs know about the name
9619 if (type
!= error_mark_node
9622 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
9623 && TYPE_ANONYMOUS_P (type
)
9624 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
9628 /* Replace the anonymous name with the real name everywhere. */
9629 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
9631 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
9632 /* We do not rename the debug info representing the
9633 anonymous tagged type because the standard says in
9634 [dcl.typedef] that the naming applies only for
9635 linkage purposes. */
9636 /*debug_hooks->set_name (t, decl);*/
9637 TYPE_NAME (t
) = decl
;
9640 if (TYPE_LANG_SPECIFIC (type
))
9641 TYPE_WAS_ANONYMOUS (type
) = 1;
9643 /* If this is a typedef within a template class, the nested
9644 type is a (non-primary) template. The name for the
9645 template needs updating as well. */
9646 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
9647 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
9648 = TYPE_IDENTIFIER (type
);
9650 /* Adjust linkage now that we aren't anonymous anymore. */
9651 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
9652 determine_visibility (TYPE_MAIN_DECL (type
));
9654 /* FIXME remangle member functions; member functions of a
9655 type with external linkage have external linkage. */
9659 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
9660 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
9662 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
9663 memfn_quals
!= TYPE_UNQUALIFIED
,
9664 inlinep
, friendp
, raises
!= NULL_TREE
);
9669 /* Detect the case of an array type of unspecified size
9670 which came, as such, direct from a typedef name.
9671 We must copy the type, so that the array's domain can be
9672 individually set by the object's initializer. */
9674 if (type
&& typedef_type
9675 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
9676 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
9677 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
9679 /* Detect where we're using a typedef of function type to declare a
9680 function. PARMS will not be set, so we must create it now. */
9682 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9684 tree decls
= NULL_TREE
;
9687 for (args
= TYPE_ARG_TYPES (type
);
9688 args
&& args
!= void_list_node
;
9689 args
= TREE_CHAIN (args
))
9691 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
9693 DECL_CHAIN (decl
) = decls
;
9697 parms
= nreverse (decls
);
9699 if (decl_context
!= TYPENAME
)
9701 /* A cv-qualifier-seq shall only be part of the function type
9702 for a non-static member function. [8.3.5/4 dcl.fct] */
9703 if (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9704 && (current_class_type
== NULL_TREE
|| staticp
) )
9707 ? G_("qualified function types cannot be used to "
9708 "declare static member functions")
9709 : G_("qualified function types cannot be used to "
9710 "declare free functions"));
9711 type
= TYPE_MAIN_VARIANT (type
);
9714 /* The qualifiers on the function type become the qualifiers on
9715 the non-static member function. */
9716 memfn_quals
|= type_memfn_quals (type
);
9717 type_quals
= TYPE_UNQUALIFIED
;
9721 /* If this is a type name (such as, in a cast or sizeof),
9722 compute the type and return it now. */
9724 if (decl_context
== TYPENAME
)
9726 /* Note that the grammar rejects storage classes
9727 in typenames, fields or parameters. */
9728 if (type_quals
!= TYPE_UNQUALIFIED
)
9729 type_quals
= TYPE_UNQUALIFIED
;
9731 /* Special case: "friend class foo" looks like a TYPENAME context. */
9734 if (type_quals
!= TYPE_UNQUALIFIED
)
9736 error ("type qualifiers specified for friend class declaration");
9737 type_quals
= TYPE_UNQUALIFIED
;
9741 error ("%<inline%> specified for friend class declaration");
9747 /* Don't allow friend declaration without a class-key. */
9748 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9749 permerror (input_location
, "template parameters cannot be friends");
9750 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
9751 permerror (input_location
, "friend declaration requires class-key, "
9752 "i.e. %<friend class %T::%D%>",
9753 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
9755 permerror (input_location
, "friend declaration requires class-key, "
9756 "i.e. %<friend %#T%>",
9760 /* Only try to do this stuff if we didn't already give up. */
9761 if (type
!= integer_type_node
)
9763 /* A friendly class? */
9764 if (current_class_type
)
9765 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
9768 error ("trying to make class %qT a friend of global scope",
9771 type
= void_type_node
;
9774 else if (memfn_quals
)
9776 if (ctype
== NULL_TREE
9777 && TREE_CODE (type
) == METHOD_TYPE
)
9778 ctype
= TYPE_METHOD_BASETYPE (type
);
9781 type
= build_memfn_type (type
, ctype
, memfn_quals
);
9782 /* Core issue #547: need to allow this in template type args. */
9783 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9784 type
= apply_memfn_quals (type
, memfn_quals
);
9786 error ("invalid qualifiers on non-member function type");
9791 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
9792 && decl_context
!= CATCHPARM
9793 && TREE_CODE (type
) != UNION_TYPE
9796 error ("abstract declarator %qT used as declaration", type
);
9797 return error_mark_node
;
9800 /* Only functions may be declared using an operator-function-id. */
9802 && IDENTIFIER_OPNAME_P (unqualified_id
)
9803 && TREE_CODE (type
) != FUNCTION_TYPE
9804 && TREE_CODE (type
) != METHOD_TYPE
)
9806 error ("declaration of %qD as non-function", unqualified_id
);
9807 return error_mark_node
;
9810 /* We don't check parameter types here because we can emit a better
9811 error message later. */
9812 if (decl_context
!= PARM
)
9814 type
= check_var_type (unqualified_id
, type
);
9815 if (type
== error_mark_node
)
9816 return error_mark_node
;
9819 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9820 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9822 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9824 if (ctype
|| in_namespace
)
9825 error ("cannot use %<::%> in parameter declaration");
9827 if (type_uses_auto (type
))
9829 error ("parameter declared %<auto%>");
9830 type
= error_mark_node
;
9833 /* A parameter declared as an array of T is really a pointer to T.
9834 One declared as a function is really a pointer to a function.
9835 One declared as a member is really a pointer to member. */
9837 if (TREE_CODE (type
) == ARRAY_TYPE
)
9839 /* Transfer const-ness of array into that of type pointed to. */
9840 type
= build_pointer_type (TREE_TYPE (type
));
9841 type_quals
= TYPE_UNQUALIFIED
;
9843 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9844 type
= build_pointer_type (type
);
9847 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
9848 && !NEW_DELETE_OPNAME_P (unqualified_id
))
9850 cp_cv_quals real_quals
= memfn_quals
;
9851 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
9852 real_quals
|= TYPE_QUAL_CONST
;
9853 type
= build_memfn_type (type
, ctype
, real_quals
);
9859 if (decl_context
== PARM
)
9861 decl
= cp_build_parm_decl (unqualified_id
, type
);
9863 bad_specifiers (decl
, BSP_PARM
, virtualp
,
9864 memfn_quals
!= TYPE_UNQUALIFIED
,
9865 inlinep
, friendp
, raises
!= NULL_TREE
);
9867 else if (decl_context
== FIELD
)
9869 /* The C99 flexible array extension. */
9870 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
9871 && TYPE_DOMAIN (type
) == NULL_TREE
)
9873 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
9874 tf_warning_or_error
);
9875 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
9878 if (type
== error_mark_node
)
9880 /* Happens when declaring arrays of sizes which
9881 are error_mark_node, for example. */
9884 else if (in_namespace
&& !friendp
)
9886 /* Something like struct S { int N::j; }; */
9887 error ("invalid use of %<::%>");
9888 return error_mark_node
;
9890 else if (TREE_CODE (type
) == FUNCTION_TYPE
9891 || TREE_CODE (type
) == METHOD_TYPE
)
9894 tree function_context
;
9898 /* This should never happen in pure C++ (the check
9899 could be an assert). It could happen in
9900 Objective-C++ if someone writes invalid code that
9901 uses a function declaration for an instance
9902 variable or property (instance variables and
9903 properties are parsed as FIELD_DECLs, but they are
9904 part of an Objective-C class, not a C++ class).
9905 That code is invalid and is caught by this
9909 error ("declaration of function %qD in invalid context",
9911 return error_mark_node
;
9914 /* ``A union may [ ... ] not [ have ] virtual functions.''
9916 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
9918 error ("function %qD declared virtual inside a union",
9920 return error_mark_node
;
9923 if (NEW_DELETE_OPNAME_P (unqualified_id
))
9927 error ("%qD cannot be declared virtual, since it "
9935 /* Check that the name used for a destructor makes sense. */
9936 if (sfk
== sfk_destructor
)
9938 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
9942 gcc_assert (friendp
);
9943 error ("expected qualified name in friend declaration "
9944 "for destructor %qD", uqname
);
9945 return error_mark_node
;
9948 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
9950 error ("declaration of %qD as member of %qT",
9952 return error_mark_node
;
9956 error ("a destructor cannot be %<constexpr%>");
9957 return error_mark_node
;
9960 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
9962 error ("expected qualified name in friend declaration "
9963 "for constructor %qD",
9964 id_declarator
->u
.id
.unqualified_name
);
9965 return error_mark_node
;
9968 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9969 function_context
= (ctype
!= NULL_TREE
) ?
9970 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
9971 publicp
= (! friendp
|| ! staticp
)
9972 && function_context
== NULL_TREE
;
9973 decl
= grokfndecl (ctype
, type
,
9974 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
9975 ? unqualified_id
: dname
,
9978 virtualp
, flags
, memfn_quals
, raises
,
9979 friendp
? -1 : 0, friendp
, publicp
,
9980 inlinep
| (2 * constexpr_p
),
9982 funcdef_flag
, template_count
, in_namespace
,
9983 attrlist
, declarator
->id_loc
);
9984 decl
= set_virt_specifiers (decl
, virt_specifiers
);
9985 if (decl
== NULL_TREE
)
9986 return error_mark_node
;
9988 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9989 /* The decl and setting of decl_attr is also turned off. */
9990 decl
= build_decl_attribute_variant (decl
, decl_attr
);
9993 /* [class.conv.ctor]
9995 A constructor declared without the function-specifier
9996 explicit that can be called with a single parameter
9997 specifies a conversion from the type of its first
9998 parameter to the type of its class. Such a constructor
9999 is called a converting constructor. */
10000 if (explicitp
== 2)
10001 DECL_NONCONVERTING_P (decl
) = 1;
10003 else if (!staticp
&& !dependent_type_p (type
)
10004 && !COMPLETE_TYPE_P (complete_type (type
))
10005 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10007 if (unqualified_id
)
10008 error ("field %qD has incomplete type", unqualified_id
);
10010 error ("name %qT has incomplete type", type
);
10012 /* If we're instantiating a template, tell them which
10013 instantiation made the field's type be incomplete. */
10014 if (current_class_type
10015 && TYPE_NAME (current_class_type
)
10016 && IDENTIFIER_TEMPLATE (current_class_name
)
10018 && declspecs
->type
== type
)
10019 error (" in instantiation of template %qT",
10020 current_class_type
);
10022 return error_mark_node
;
10028 error ("%qE is neither function nor member function; "
10029 "cannot be declared friend", unqualified_id
);
10037 /* Friends are treated specially. */
10038 if (ctype
== current_class_type
)
10039 ; /* We already issued a permerror. */
10040 else if (decl
&& DECL_NAME (decl
))
10042 if (template_class_depth (current_class_type
) == 0)
10044 decl
= check_explicit_specialization
10045 (unqualified_id
, decl
, template_count
,
10046 2 * funcdef_flag
+ 4);
10047 if (decl
== error_mark_node
)
10048 return error_mark_node
;
10051 decl
= do_friend (ctype
, unqualified_id
, decl
,
10057 return error_mark_node
;
10060 /* Structure field. It may not be a function, except for C++. */
10062 if (decl
== NULL_TREE
)
10068 /* An attempt is being made to initialize a non-static
10069 member. But, from [class.mem]:
10071 4 A member-declarator can contain a
10072 constant-initializer only if it declares a static
10073 member (_class.static_) of integral or enumeration
10074 type, see _class.static.data_.
10076 This used to be relatively common practice, but
10077 the rest of the compiler does not correctly
10078 handle the initialization unless the member is
10079 static so we make it static below. */
10080 if (cxx_dialect
>= cxx0x
)
10082 sorry ("non-static data member initializers");
10086 permerror (input_location
, "ISO C++ forbids initialization of member %qD",
10088 permerror (input_location
, "making %qD static", unqualified_id
);
10096 /* C++ allows static class members. All other work
10097 for this is done by grokfield. */
10098 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
10099 set_linkage_for_static_data_member (decl
);
10100 /* Even if there is an in-class initialization, DECL
10101 is considered undefined until an out-of-class
10102 definition is provided. */
10103 DECL_EXTERNAL (decl
) = 1;
10106 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10108 if (constexpr_p
&& !initialized
)
10110 error ("constexpr static data member %qD must have an "
10111 "initializer", decl
);
10112 constexpr_p
= false;
10119 error ("non-static data member %qE declared %<constexpr%>",
10121 constexpr_p
= false;
10123 decl
= build_decl (input_location
,
10124 FIELD_DECL
, unqualified_id
, type
);
10125 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10126 if (bitfield
&& !unqualified_id
)
10127 TREE_NO_WARNING (decl
) = 1;
10129 if (storage_class
== sc_mutable
)
10131 DECL_MUTABLE_P (decl
) = 1;
10132 storage_class
= sc_none
;
10136 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10137 memfn_quals
!= TYPE_UNQUALIFIED
,
10138 inlinep
, friendp
, raises
!= NULL_TREE
);
10141 else if (TREE_CODE (type
) == FUNCTION_TYPE
10142 || TREE_CODE (type
) == METHOD_TYPE
)
10144 tree original_name
;
10147 if (!unqualified_id
)
10148 return error_mark_node
;
10150 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10151 original_name
= dname
;
10153 original_name
= unqualified_id
;
10155 if (storage_class
== sc_auto
)
10156 error ("storage class %<auto%> invalid for function %qs", name
);
10157 else if (storage_class
== sc_register
)
10158 error ("storage class %<register%> invalid for function %qs", name
);
10160 error ("storage class %<__thread%> invalid for function %qs", name
);
10162 if (virt_specifiers
)
10163 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10164 /* Function declaration not at top level.
10165 Storage classes other than `extern' are not allowed
10166 and `extern' makes no difference. */
10167 if (! toplevel_bindings_p ()
10168 && (storage_class
== sc_static
10169 || declspecs
->specs
[(int)ds_inline
])
10172 if (storage_class
== sc_static
)
10173 pedwarn (input_location
, OPT_pedantic
,
10174 "%<static%> specified invalid for function %qs "
10175 "declared out of global scope", name
);
10177 pedwarn (input_location
, OPT_pedantic
,
10178 "%<inline%> specifier invalid for function %qs "
10179 "declared out of global scope", name
);
10182 if (ctype
== NULL_TREE
)
10186 error ("virtual non-class function %qs", name
);
10189 else if (sfk
== sfk_constructor
10190 || sfk
== sfk_destructor
)
10192 error (funcdef_flag
10193 ? "%qs defined in a non-class scope"
10194 : "%qs declared in a non-class scope", name
);
10199 /* Record presence of `static'. */
10200 publicp
= (ctype
!= NULL_TREE
10201 || storage_class
== sc_extern
10202 || storage_class
!= sc_static
);
10204 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10205 virtualp
, flags
, memfn_quals
, raises
,
10207 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10209 template_count
, in_namespace
, attrlist
,
10210 declarator
->id_loc
);
10211 if (decl
== NULL_TREE
)
10212 return error_mark_node
;
10216 int invalid_static
= 0;
10218 /* Don't allow a static member function in a class, and forbid
10219 declaring main to be static. */
10220 if (TREE_CODE (type
) == METHOD_TYPE
)
10222 permerror (input_location
, "cannot declare member function %qD to have "
10223 "static linkage", decl
);
10224 invalid_static
= 1;
10226 else if (current_function_decl
)
10228 /* FIXME need arm citation */
10229 error ("cannot declare static function inside another function");
10230 invalid_static
= 1;
10233 if (invalid_static
)
10236 storage_class
= sc_none
;
10242 /* It's a variable. */
10244 /* An uninitialized decl with `extern' is a reference. */
10245 decl
= grokvardecl (type
, unqualified_id
,
10248 (type_quals
& TYPE_QUAL_CONST
) != 0,
10249 ctype
? ctype
: in_namespace
);
10250 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10251 memfn_quals
!= TYPE_UNQUALIFIED
,
10252 inlinep
, friendp
, raises
!= NULL_TREE
);
10256 DECL_CONTEXT (decl
) = ctype
;
10259 permerror (input_location
, "%<static%> may not be used when defining "
10260 "(as opposed to declaring) a static data member");
10262 storage_class
= sc_none
;
10264 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10266 error ("static member %qD declared %<register%>", decl
);
10267 storage_class
= sc_none
;
10269 if (storage_class
== sc_extern
&& pedantic
)
10271 pedwarn (input_location
, OPT_pedantic
,
10272 "cannot explicitly declare member %q#D to have "
10273 "extern linkage", decl
);
10274 storage_class
= sc_none
;
10277 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10279 error ("declaration of constexpr variable %qD is not a definition",
10281 constexpr_p
= false;
10285 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10287 if (toplevel_bindings_p ())
10289 /* It's common practice (and completely valid) to have a const
10290 be initialized and declared extern. */
10291 if (!(type_quals
& TYPE_QUAL_CONST
))
10292 warning (0, "%qs initialized and declared %<extern%>", name
);
10296 error ("%qs has both %<extern%> and initializer", name
);
10297 return error_mark_node
;
10301 /* Record `register' declaration for warnings on &
10302 and in case doing stupid register allocation. */
10304 if (storage_class
== sc_register
)
10305 DECL_REGISTER (decl
) = 1;
10306 else if (storage_class
== sc_extern
)
10307 DECL_THIS_EXTERN (decl
) = 1;
10308 else if (storage_class
== sc_static
)
10309 DECL_THIS_STATIC (decl
) = 1;
10311 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10312 if (constexpr_p
&& TREE_CODE (decl
) == VAR_DECL
)
10313 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10315 /* Record constancy and volatility on the DECL itself . There's
10316 no need to do this when processing a template; we'll do this
10317 for the instantiated declaration based on the type of DECL. */
10318 if (!processing_template_decl
)
10319 cp_apply_type_quals_to_decl (type_quals
, decl
);
10325 /* Subroutine of start_function. Ensure that each of the parameter
10326 types (as listed in PARMS) is complete, as is required for a
10327 function definition. */
10330 require_complete_types_for_parms (tree parms
)
10332 for (; parms
; parms
= DECL_CHAIN (parms
))
10334 if (dependent_type_p (TREE_TYPE (parms
)))
10336 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10337 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10339 relayout_decl (parms
);
10340 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10343 /* grokparms or complete_type_or_else will have already issued
10345 TREE_TYPE (parms
) = error_mark_node
;
10349 /* Returns nonzero if T is a local variable. */
10352 local_variable_p (const_tree t
)
10354 if ((TREE_CODE (t
) == VAR_DECL
10355 /* A VAR_DECL with a context that is a _TYPE is a static data
10357 && !TYPE_P (CP_DECL_CONTEXT (t
))
10358 /* Any other non-local variable must be at namespace scope. */
10359 && !DECL_NAMESPACE_SCOPE_P (t
))
10360 || (TREE_CODE (t
) == PARM_DECL
))
10366 /* Like local_variable_p, but suitable for use as a tree-walking
10370 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10371 void *data ATTRIBUTE_UNUSED
)
10373 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
10375 else if (TYPE_P (*tp
))
10376 *walk_subtrees
= 0;
10382 /* Check that ARG, which is a default-argument expression for a
10383 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10384 something goes wrong. DECL may also be a _TYPE node, rather than a
10385 DECL, if there is no DECL available. */
10388 check_default_argument (tree decl
, tree arg
)
10393 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10394 /* We get a DEFAULT_ARG when looking at an in-class declaration
10395 with a default argument. Ignore the argument for now; we'll
10396 deal with it after the class is complete. */
10405 decl_type
= TREE_TYPE (decl
);
10407 if (arg
== error_mark_node
10408 || decl
== error_mark_node
10409 || TREE_TYPE (arg
) == error_mark_node
10410 || decl_type
== error_mark_node
)
10411 /* Something already went wrong. There's no need to check
10413 return error_mark_node
;
10415 /* [dcl.fct.default]
10417 A default argument expression is implicitly converted to the
10419 if (!TREE_TYPE (arg
)
10420 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
10423 error ("default argument for %q#D has type %qT",
10424 decl
, TREE_TYPE (arg
));
10426 error ("default argument for parameter of type %qT has type %qT",
10427 decl_type
, TREE_TYPE (arg
));
10429 return error_mark_node
;
10432 /* [dcl.fct.default]
10434 Local variables shall not be used in default argument
10437 The keyword `this' shall not be used in a default argument of a
10438 member function. */
10439 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10442 error ("default argument %qE uses local variable %qD", arg
, var
);
10443 return error_mark_node
;
10450 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10453 type_is_deprecated (tree type
)
10455 enum tree_code code
;
10456 if (TREE_DEPRECATED (type
))
10458 if (TYPE_NAME (type
)
10459 && TREE_DEPRECATED (TYPE_NAME (type
)))
10462 /* Do warn about using typedefs to a deprecated class. */
10463 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10464 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10466 code
= TREE_CODE (type
);
10468 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10469 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10470 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10471 return type_is_deprecated (TREE_TYPE (type
));
10473 if (TYPE_PTRMEMFUNC_P (type
))
10474 return type_is_deprecated
10475 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10480 /* Decode the list of parameter types for a function type.
10481 Given the list of things declared inside the parens,
10482 return a list of types.
10484 If this parameter does not end with an ellipsis, we append
10487 *PARMS is set to the chain of PARM_DECLs created. */
10490 grokparms (tree parmlist
, tree
*parms
)
10492 tree result
= NULL_TREE
;
10493 tree decls
= NULL_TREE
;
10497 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
10499 tree type
= NULL_TREE
;
10500 tree init
= TREE_PURPOSE (parm
);
10501 tree decl
= TREE_VALUE (parm
);
10502 const char *errmsg
;
10504 if (parm
== void_list_node
)
10507 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
10510 type
= TREE_TYPE (decl
);
10511 if (VOID_TYPE_P (type
))
10513 if (same_type_p (type
, void_type_node
)
10514 && DECL_SELF_REFERENCE_P (type
)
10515 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
10516 /* this is a parmlist of `(void)', which is ok. */
10518 cxx_incomplete_type_error (decl
, type
);
10519 /* It's not a good idea to actually create parameters of
10520 type `void'; other parts of the compiler assume that a
10521 void type terminates the parameter list. */
10522 type
= error_mark_node
;
10523 TREE_TYPE (decl
) = error_mark_node
;
10526 if (type
!= error_mark_node
10527 && TYPE_FOR_JAVA (type
)
10528 && MAYBE_CLASS_TYPE_P (type
))
10530 error ("parameter %qD has Java class type", decl
);
10531 type
= error_mark_node
;
10532 TREE_TYPE (decl
) = error_mark_node
;
10536 if (type
!= error_mark_node
10537 && (errmsg
= targetm
.invalid_parameter_type (type
)))
10540 type
= error_mark_node
;
10541 TREE_TYPE (decl
) = error_mark_node
;
10544 if (type
!= error_mark_node
)
10546 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
10548 tree deptype
= type_is_deprecated (type
);
10550 warn_deprecated_use (deptype
, NULL_TREE
);
10553 /* Top-level qualifiers on the parameters are
10554 ignored for function types. */
10555 type
= cp_build_qualified_type (type
, 0);
10556 if (TREE_CODE (type
) == METHOD_TYPE
)
10558 error ("parameter %qD invalidly declared method type", decl
);
10559 type
= build_pointer_type (type
);
10560 TREE_TYPE (decl
) = type
;
10562 else if (abstract_virtuals_error (decl
, type
))
10563 any_error
= 1; /* Seems like a good idea. */
10564 else if (POINTER_TYPE_P (type
))
10566 /* [dcl.fct]/6, parameter types cannot contain pointers
10567 (references) to arrays of unknown bound. */
10568 tree t
= TREE_TYPE (type
);
10569 int ptr
= TYPE_PTR_P (type
);
10573 if (TYPE_PTR_P (t
))
10575 else if (TREE_CODE (t
) != ARRAY_TYPE
)
10577 else if (!TYPE_DOMAIN (t
))
10581 if (TREE_CODE (t
) == ARRAY_TYPE
)
10583 ? G_("parameter %qD includes pointer to array of "
10584 "unknown bound %qT")
10585 : G_("parameter %qD includes reference to array of "
10586 "unknown bound %qT"),
10592 else if (init
&& !processing_template_decl
)
10593 init
= check_default_argument (decl
, init
);
10596 DECL_CHAIN (decl
) = decls
;
10598 result
= tree_cons (init
, type
, result
);
10600 decls
= nreverse (decls
);
10601 result
= nreverse (result
);
10603 result
= chainon (result
, void_list_node
);
10610 /* D is a constructor or overloaded `operator='.
10612 Let T be the class in which D is declared. Then, this function
10615 -1 if D's is an ill-formed constructor or copy assignment operator
10616 whose first parameter is of type `T'.
10617 0 if D is not a copy constructor or copy assignment
10619 1 if D is a copy constructor or copy assignment operator whose
10620 first parameter is a reference to non-const qualified T.
10621 2 if D is a copy constructor or copy assignment operator whose
10622 first parameter is a reference to const qualified T.
10624 This function can be used as a predicate. Positive values indicate
10625 a copy constructor and nonzero values indicate a copy assignment
10629 copy_fn_p (const_tree d
)
10635 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10637 if (TREE_CODE (d
) == TEMPLATE_DECL
10638 || (DECL_TEMPLATE_INFO (d
)
10639 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10640 /* Instantiations of template member functions are never copy
10641 functions. Note that member functions of templated classes are
10642 represented as template functions internally, and we must
10643 accept those as copy functions. */
10646 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10650 arg_type
= TREE_VALUE (args
);
10651 if (arg_type
== error_mark_node
)
10654 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
10656 /* Pass by value copy assignment operator. */
10659 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10660 && !TYPE_REF_IS_RVALUE (arg_type
)
10661 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
10663 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
10669 args
= TREE_CHAIN (args
);
10671 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10672 /* There are more non-optional args. */
10678 /* D is a constructor or overloaded `operator='.
10680 Let T be the class in which D is declared. Then, this function
10681 returns true when D is a move constructor or move assignment
10682 operator, false otherwise. */
10685 move_fn_p (const_tree d
)
10689 bool result
= false;
10691 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10693 if (cxx_dialect
== cxx98
)
10694 /* There are no move constructors if we are in C++98 mode. */
10697 if (TREE_CODE (d
) == TEMPLATE_DECL
10698 || (DECL_TEMPLATE_INFO (d
)
10699 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10700 /* Instantiations of template member functions are never copy
10701 functions. Note that member functions of templated classes are
10702 represented as template functions internally, and we must
10703 accept those as copy functions. */
10706 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10710 arg_type
= TREE_VALUE (args
);
10711 if (arg_type
== error_mark_node
)
10714 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10715 && TYPE_REF_IS_RVALUE (arg_type
)
10716 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
10720 args
= TREE_CHAIN (args
);
10722 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10723 /* There are more non-optional args. */
10729 /* Remember any special properties of member function DECL. */
10732 grok_special_member_properties (tree decl
)
10736 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
10739 class_type
= DECL_CONTEXT (decl
);
10740 if (DECL_CONSTRUCTOR_P (decl
))
10742 int ctor
= copy_fn_p (decl
);
10744 if (!DECL_ARTIFICIAL (decl
))
10745 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
10751 A non-template constructor for class X is a copy
10752 constructor if its first parameter is of type X&, const
10753 X&, volatile X& or const volatile X&, and either there
10754 are no other parameters or else all other parameters have
10755 default arguments. */
10756 TYPE_HAS_COPY_CTOR (class_type
) = 1;
10757 if (user_provided_p (decl
))
10758 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
10760 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
10762 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
10764 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
10765 if (user_provided_p (decl
))
10766 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
10768 else if (move_fn_p (decl
) && user_provided_p (decl
))
10769 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
10770 else if (is_list_ctor (decl
))
10771 TYPE_HAS_LIST_CTOR (class_type
) = 1;
10773 if (DECL_DECLARED_CONSTEXPR_P (decl
)
10774 && !copy_fn_p (decl
) && !move_fn_p (decl
))
10775 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
10777 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
10781 A non-template assignment operator for class X is a copy
10782 assignment operator if its parameter is of type X, X&, const
10783 X&, volatile X& or const volatile X&. */
10785 int assop
= copy_fn_p (decl
);
10789 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
10790 if (user_provided_p (decl
))
10791 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
10793 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
10795 else if (move_fn_p (decl
) && user_provided_p (decl
))
10796 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
10798 /* Destructors are handled in check_methods. */
10801 /* Check a constructor DECL has the correct form. Complains
10802 if the class has a constructor of the form X(X). */
10805 grok_ctor_properties (const_tree ctype
, const_tree decl
)
10807 int ctor_parm
= copy_fn_p (decl
);
10813 A declaration of a constructor for a class X is ill-formed if
10814 its first parameter is of type (optionally cv-qualified) X
10815 and either there are no other parameters or else all other
10816 parameters have default arguments.
10818 We *don't* complain about member template instantiations that
10819 have this form, though; they can occur as we try to decide
10820 what constructor to use during overload resolution. Since
10821 overload resolution will never prefer such a constructor to
10822 the non-template copy constructor (which is either explicitly
10823 or implicitly defined), there's no need to worry about their
10824 existence. Theoretically, they should never even be
10825 instantiated, but that's hard to forestall. */
10826 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10834 /* An operator with this code is unary, but can also be binary. */
10837 ambi_op_p (enum tree_code code
)
10839 return (code
== INDIRECT_REF
10840 || code
== ADDR_EXPR
10841 || code
== UNARY_PLUS_EXPR
10842 || code
== NEGATE_EXPR
10843 || code
== PREINCREMENT_EXPR
10844 || code
== PREDECREMENT_EXPR
);
10847 /* An operator with this name can only be unary. */
10850 unary_op_p (enum tree_code code
)
10852 return (code
== TRUTH_NOT_EXPR
10853 || code
== BIT_NOT_EXPR
10854 || code
== COMPONENT_REF
10855 || code
== TYPE_EXPR
);
10858 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10859 errors are issued for invalid declarations. */
10862 grok_op_properties (tree decl
, bool complain
)
10864 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
10866 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
10867 tree name
= DECL_NAME (decl
);
10868 enum tree_code operator_code
;
10873 /* Count the number of arguments and check for ellipsis. */
10874 for (argtype
= argtypes
, arity
= 0;
10875 argtype
&& argtype
!= void_list_node
;
10876 argtype
= TREE_CHAIN (argtype
))
10878 ellipsis_p
= !argtype
;
10880 class_type
= DECL_CONTEXT (decl
);
10881 if (class_type
&& !CLASS_TYPE_P (class_type
))
10882 class_type
= NULL_TREE
;
10884 if (DECL_CONV_FN_P (decl
))
10885 operator_code
= TYPE_EXPR
;
10889 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10890 if (ansi_opname (CODE) == name) \
10892 operator_code = (CODE); \
10895 else if (ansi_assopname (CODE) == name) \
10897 operator_code = (CODE); \
10898 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10902 #include "operators.def"
10903 #undef DEF_OPERATOR
10905 gcc_unreachable ();
10908 gcc_assert (operator_code
!= MAX_TREE_CODES
);
10909 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
10912 switch (operator_code
)
10915 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
10919 TYPE_GETS_DELETE (class_type
) |= 1;
10923 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
10926 case VEC_DELETE_EXPR
:
10927 TYPE_GETS_DELETE (class_type
) |= 2;
10934 /* [basic.std.dynamic.allocation]/1:
10936 A program is ill-formed if an allocation function is declared
10937 in a namespace scope other than global scope or declared static
10940 The same also holds true for deallocation functions. */
10941 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
10942 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
10944 if (DECL_NAMESPACE_SCOPE_P (decl
))
10946 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
10948 error ("%qD may not be declared within a namespace", decl
);
10951 else if (!TREE_PUBLIC (decl
))
10953 error ("%qD may not be declared as static", decl
);
10959 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
10961 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
10962 DECL_IS_OPERATOR_NEW (decl
) = 1;
10964 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
10965 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
10968 /* An operator function must either be a non-static member function
10969 or have at least one parameter of a class, a reference to a class,
10970 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10971 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
10973 if (operator_code
== TYPE_EXPR
10974 || operator_code
== CALL_EXPR
10975 || operator_code
== COMPONENT_REF
10976 || operator_code
== ARRAY_REF
10977 || operator_code
== NOP_EXPR
)
10979 error ("%qD must be a nonstatic member function", decl
);
10986 if (DECL_STATIC_FUNCTION_P (decl
))
10988 error ("%qD must be either a non-static member "
10989 "function or a non-member function", decl
);
10993 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
10995 tree arg
= non_reference (TREE_VALUE (p
));
10996 if (arg
== error_mark_node
)
10999 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11000 because these checks are performed even on
11001 template functions. */
11002 if (MAYBE_CLASS_TYPE_P (arg
)
11003 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11007 if (!p
|| p
== void_list_node
)
11010 error ("%qD must have an argument of class or "
11011 "enumerated type", decl
);
11017 /* There are no restrictions on the arguments to an overloaded
11019 if (operator_code
== CALL_EXPR
)
11022 /* Warn about conversion operators that will never be used. */
11023 if (IDENTIFIER_TYPENAME_P (name
)
11024 && ! DECL_TEMPLATE_INFO (decl
)
11026 /* Warn only declaring the function; there is no need to
11027 warn again about out-of-class definitions. */
11028 && class_type
== current_class_type
)
11030 tree t
= TREE_TYPE (name
);
11031 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11034 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11036 if (TREE_CODE (t
) == VOID_TYPE
)
11037 warning (OPT_Wconversion
,
11039 ? G_("conversion to a reference to void "
11040 "will never use a type conversion operator")
11041 : G_("conversion to void "
11042 "will never use a type conversion operator"));
11043 else if (class_type
)
11045 if (t
== class_type
)
11046 warning (OPT_Wconversion
,
11048 ? G_("conversion to a reference to the same type "
11049 "will never use a type conversion operator")
11050 : G_("conversion to the same type "
11051 "will never use a type conversion operator"));
11052 /* Don't force t to be complete here. */
11053 else if (MAYBE_CLASS_TYPE_P (t
)
11054 && COMPLETE_TYPE_P (t
)
11055 && DERIVED_FROM_P (t
, class_type
))
11056 warning (OPT_Wconversion
,
11058 ? G_("conversion to a reference to a base class "
11059 "will never use a type conversion operator")
11060 : G_("conversion to a base class "
11061 "will never use a type conversion operator"));
11066 if (operator_code
== COND_EXPR
)
11069 error ("ISO C++ prohibits overloading operator ?:");
11072 else if (ellipsis_p
)
11074 error ("%qD must not have variable number of arguments", decl
);
11077 else if (ambi_op_p (operator_code
))
11080 /* We pick the one-argument operator codes by default, so
11081 we don't have to change anything. */
11083 else if (arity
== 2)
11085 /* If we thought this was a unary operator, we now know
11086 it to be a binary operator. */
11087 switch (operator_code
)
11090 operator_code
= MULT_EXPR
;
11094 operator_code
= BIT_AND_EXPR
;
11097 case UNARY_PLUS_EXPR
:
11098 operator_code
= PLUS_EXPR
;
11102 operator_code
= MINUS_EXPR
;
11105 case PREINCREMENT_EXPR
:
11106 operator_code
= POSTINCREMENT_EXPR
;
11109 case PREDECREMENT_EXPR
:
11110 operator_code
= POSTDECREMENT_EXPR
;
11114 gcc_unreachable ();
11117 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11119 if ((operator_code
== POSTINCREMENT_EXPR
11120 || operator_code
== POSTDECREMENT_EXPR
)
11121 && ! processing_template_decl
11122 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11125 error ("postfix %qD must take %<int%> as its argument",
11128 error ("postfix %qD must take %<int%> as its second "
11136 error ("%qD must take either zero or one argument", decl
);
11138 error ("%qD must take either one or two arguments", decl
);
11142 /* More Effective C++ rule 6. */
11144 && (operator_code
== POSTINCREMENT_EXPR
11145 || operator_code
== POSTDECREMENT_EXPR
11146 || operator_code
== PREINCREMENT_EXPR
11147 || operator_code
== PREDECREMENT_EXPR
))
11149 tree arg
= TREE_VALUE (argtypes
);
11150 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11151 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11152 arg
= TREE_TYPE (arg
);
11153 arg
= TYPE_MAIN_VARIANT (arg
);
11154 if (operator_code
== PREINCREMENT_EXPR
11155 || operator_code
== PREDECREMENT_EXPR
)
11157 if (TREE_CODE (ret
) != REFERENCE_TYPE
11158 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11160 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11161 build_reference_type (arg
));
11165 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11166 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11170 else if (unary_op_p (operator_code
))
11175 error ("%qD must take %<void%>", decl
);
11177 error ("%qD must take exactly one argument", decl
);
11181 else /* if (binary_op_p (operator_code)) */
11186 error ("%qD must take exactly one argument", decl
);
11188 error ("%qD must take exactly two arguments", decl
);
11192 /* More Effective C++ rule 7. */
11194 && (operator_code
== TRUTH_ANDIF_EXPR
11195 || operator_code
== TRUTH_ORIF_EXPR
11196 || operator_code
== COMPOUND_EXPR
))
11197 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11201 /* Effective C++ rule 23. */
11204 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11205 && (operator_code
== PLUS_EXPR
11206 || operator_code
== MINUS_EXPR
11207 || operator_code
== TRUNC_DIV_EXPR
11208 || operator_code
== MULT_EXPR
11209 || operator_code
== TRUNC_MOD_EXPR
)
11210 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11211 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11213 /* [over.oper]/8 */
11214 for (; argtypes
&& argtypes
!= void_list_node
;
11215 argtypes
= TREE_CHAIN (argtypes
))
11216 if (TREE_PURPOSE (argtypes
))
11218 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11219 if (operator_code
== POSTINCREMENT_EXPR
11220 || operator_code
== POSTDECREMENT_EXPR
)
11222 pedwarn (input_location
, OPT_pedantic
, "%qD cannot have default arguments",
11227 error ("%qD cannot have default arguments", decl
);
11235 /* Return a string giving the keyword associate with CODE. */
11237 static const char *
11238 tag_name (enum tag_types code
)
11250 case typename_type
:
11253 gcc_unreachable ();
11257 /* Name lookup in an elaborated-type-specifier (after the keyword
11258 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11259 elaborated-type-specifier is invalid, issue a diagnostic and return
11260 error_mark_node; otherwise, return the *_TYPE to which it referred.
11261 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11264 check_elaborated_type_specifier (enum tag_types tag_code
,
11266 bool allow_template_p
)
11272 struct S { struct S *p; };
11274 name lookup will find the TYPE_DECL for the implicit "S::S"
11275 typedef. Adjust for that here. */
11276 if (DECL_SELF_REFERENCE_P (decl
))
11277 decl
= TYPE_NAME (TREE_TYPE (decl
));
11279 type
= TREE_TYPE (decl
);
11281 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11282 is false for this case as well. */
11283 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11285 error ("using template type parameter %qT after %qs",
11286 type
, tag_name (tag_code
));
11287 return error_mark_node
;
11291 If the identifier resolves to a typedef-name or a template
11292 type-parameter, the elaborated-type-specifier is ill-formed.
11294 In other words, the only legitimate declaration to use in the
11295 elaborated type specifier is the implicit typedef created when
11296 the type is declared. */
11297 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11298 && !DECL_SELF_REFERENCE_P (decl
)
11299 && tag_code
!= typename_type
)
11301 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11302 error ("%q+D has a previous declaration here", decl
);
11303 return error_mark_node
;
11305 else if (TREE_CODE (type
) != RECORD_TYPE
11306 && TREE_CODE (type
) != UNION_TYPE
11307 && tag_code
!= enum_type
11308 && tag_code
!= typename_type
)
11310 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11311 error ("%q+T has a previous declaration here", type
);
11312 return error_mark_node
;
11314 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11315 && tag_code
== enum_type
)
11317 error ("%qT referred to as enum", type
);
11318 error ("%q+T has a previous declaration here", type
);
11319 return error_mark_node
;
11321 else if (!allow_template_p
11322 && TREE_CODE (type
) == RECORD_TYPE
11323 && CLASSTYPE_IS_TEMPLATE (type
))
11325 /* If a class template appears as elaborated type specifier
11326 without a template header such as:
11328 template <class T> class C {};
11329 void f(class C); // No template header here
11331 then the required template argument is missing. */
11332 error ("template argument required for %<%s %T%>",
11333 tag_name (tag_code
),
11334 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11335 return error_mark_node
;
11341 /* Lookup NAME in elaborate type specifier in scope according to
11342 SCOPE and issue diagnostics if necessary.
11343 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11344 found, and ERROR_MARK_NODE for type error. */
11347 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11348 tag_scope scope
, bool template_header_p
)
11352 if (scope
== ts_global
)
11354 /* First try ordinary name lookup, ignoring hidden class name
11355 injected via friend declaration. */
11356 decl
= lookup_name_prefer_type (name
, 2);
11357 /* If that fails, the name will be placed in the smallest
11358 non-class, non-function-prototype scope according to 3.3.1/5.
11359 We may already have a hidden name declared as friend in this
11360 scope. So lookup again but not ignoring hidden names.
11361 If we find one, that name will be made visible rather than
11362 creating a new tag. */
11364 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11367 decl
= lookup_type_scope (name
, scope
);
11369 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
11370 decl
= DECL_TEMPLATE_RESULT (decl
);
11372 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11374 /* Look for invalid nested type:
11378 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11380 error ("%qD has the same name as the class in which it is "
11383 return error_mark_node
;
11386 /* Two cases we need to consider when deciding if a class
11387 template is allowed as an elaborated type specifier:
11388 1. It is a self reference to its own class.
11389 2. It comes with a template header.
11393 template <class T> class C {
11394 class C *c1; // DECL_SELF_REFERENCE_P is true
11397 template <class U> class C; // template_header_p is true
11398 template <class T> class C<T>::D {
11399 class C *c2; // DECL_SELF_REFERENCE_P is true
11402 t
= check_elaborated_type_specifier (tag_code
,
11405 | DECL_SELF_REFERENCE_P (decl
));
11408 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11410 error ("reference to %qD is ambiguous", name
);
11411 print_candidates (decl
);
11412 return error_mark_node
;
11418 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11419 Define the tag as a forward-reference if it is not defined.
11421 If a declaration is given, process it here, and report an error if
11422 multiple declarations are not identical.
11424 SCOPE is TS_CURRENT when this is also a definition. Only look in
11425 the current frame for the name (since C++ allows new names in any
11426 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11427 declaration. Only look beginning from the current scope outward up
11428 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11430 TEMPLATE_HEADER_P is true when this declaration is preceded by
11431 a set of template parameters. */
11434 xref_tag_1 (enum tag_types tag_code
, tree name
,
11435 tag_scope scope
, bool template_header_p
)
11437 enum tree_code code
;
11439 tree context
= NULL_TREE
;
11441 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11447 code
= RECORD_TYPE
;
11453 code
= ENUMERAL_TYPE
;
11456 gcc_unreachable ();
11459 /* In case of anonymous name, xref_tag is only called to
11460 make type node and push name. Name lookup is not required. */
11461 if (ANON_AGGRNAME_P (name
))
11464 t
= lookup_and_check_tag (tag_code
, name
,
11465 scope
, template_header_p
);
11467 if (t
== error_mark_node
)
11468 return error_mark_node
;
11470 if (scope
!= ts_current
&& t
&& current_class_type
11471 && template_class_depth (current_class_type
)
11472 && template_header_p
)
11474 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11475 definition of this tag. Since, in addition, we are currently
11476 processing a (member) template declaration of a template
11477 class, we must be very careful; consider:
11484 { template <class V>
11485 friend struct S1; };
11487 Here, the S2::S1 declaration should not be confused with the
11488 outer declaration. In particular, the inner version should
11489 have a template parameter of level 2, not level 1. This
11490 would be particularly important if the member declaration
11493 template <class V = U> friend struct S1;
11495 say, when we should tsubst into `U' when instantiating
11496 S2. On the other hand, when presented with:
11506 we must find the inner binding eventually. We
11507 accomplish this by making sure that the new type we
11508 create to represent this declaration has the right
11510 context
= TYPE_CONTEXT (t
);
11516 /* If no such tag is yet defined, create a forward-reference node
11517 and record it as the "definition".
11518 When a real declaration of this type is found,
11519 the forward-reference will be altered into a real type. */
11520 if (code
== ENUMERAL_TYPE
)
11522 error ("use of enum %q#D without previous declaration", name
);
11523 return error_mark_node
;
11527 t
= make_class_type (code
);
11528 TYPE_CONTEXT (t
) = context
;
11529 t
= pushtag (name
, t
, scope
);
11534 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
11536 if (!redeclare_class_template (t
, current_template_parms
))
11537 return error_mark_node
;
11539 else if (!processing_template_decl
11540 && CLASS_TYPE_P (t
)
11541 && CLASSTYPE_IS_TEMPLATE (t
))
11543 error ("redeclaration of %qT as a non-template", t
);
11544 error ("previous declaration %q+D", t
);
11545 return error_mark_node
;
11548 /* Make injected friend class visible. */
11549 if (scope
!= ts_within_enclosing_non_class
11550 && hidden_name_p (TYPE_NAME (t
)))
11552 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
11553 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
11555 if (TYPE_TEMPLATE_INFO (t
))
11557 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
11558 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
11566 /* Wrapper for xref_tag_1. */
11569 xref_tag (enum tag_types tag_code
, tree name
,
11570 tag_scope scope
, bool template_header_p
)
11573 timevar_start (TV_NAME_LOOKUP
);
11574 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
11575 timevar_stop (TV_NAME_LOOKUP
);
11581 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
11583 enum tag_types tag_kind
;
11585 if (TREE_CODE (old
) == RECORD_TYPE
)
11586 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
11588 tag_kind
= union_type
;
11590 if (id
== NULL_TREE
)
11591 id
= TYPE_IDENTIFIER (old
);
11593 return xref_tag (tag_kind
, id
, scope
, false);
11596 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11597 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11598 access_* node, and the TREE_VALUE is the type of the base-class.
11599 Non-NULL TREE_TYPE indicates virtual inheritance.
11601 Returns true if the binfo hierarchy was successfully created,
11602 false if an error was detected. */
11605 xref_basetypes (tree ref
, tree base_list
)
11608 tree binfo
, base_binfo
;
11609 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
11610 unsigned max_bases
= 0; /* Maximum direct bases. */
11612 tree default_access
;
11613 tree igo_prev
; /* Track Inheritance Graph Order. */
11615 if (ref
== error_mark_node
)
11618 /* The base of a derived class is private by default, all others are
11620 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
11621 && CLASSTYPE_DECLARED_CLASS (ref
)
11622 ? access_private_node
: access_public_node
);
11624 /* First, make sure that any templates in base-classes are
11625 instantiated. This ensures that if we call ourselves recursively
11626 we do not get confused about which classes are marked and which
11628 basep
= &base_list
;
11631 tree basetype
= TREE_VALUE (*basep
);
11633 if (!(processing_template_decl
&& uses_template_parms (basetype
))
11634 && !complete_type_or_else (basetype
, NULL
))
11635 /* An incomplete type. Remove it from the list. */
11636 *basep
= TREE_CHAIN (*basep
);
11640 if (TREE_TYPE (*basep
))
11642 if (CLASS_TYPE_P (basetype
))
11643 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
11644 basep
= &TREE_CHAIN (*basep
);
11648 TYPE_MARKED_P (ref
) = 1;
11650 /* The binfo slot should be empty, unless this is an (ill-formed)
11652 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
11654 error ("redefinition of %q#T", ref
);
11658 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
11660 binfo
= make_tree_binfo (max_bases
);
11662 TYPE_BINFO (ref
) = binfo
;
11663 BINFO_OFFSET (binfo
) = size_zero_node
;
11664 BINFO_TYPE (binfo
) = ref
;
11666 /* Apply base-class info set up to the variants of this type. */
11667 fixup_type_variants (ref
);
11671 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
11672 /* An aggregate cannot have baseclasses. */
11673 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
11675 if (TREE_CODE (ref
) == UNION_TYPE
)
11677 error ("derived union %qT invalid", ref
);
11684 if (TYPE_FOR_JAVA (ref
))
11686 error ("Java class %qT cannot have multiple bases", ref
);
11693 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
11695 if (TYPE_FOR_JAVA (ref
))
11697 error ("Java class %qT cannot have virtual bases", ref
);
11702 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
11704 tree access
= TREE_PURPOSE (base_list
);
11705 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
11706 tree basetype
= TREE_VALUE (base_list
);
11708 if (access
== access_default_node
)
11709 access
= default_access
;
11711 if (PACK_EXPANSION_P (basetype
))
11712 basetype
= PACK_EXPANSION_PATTERN (basetype
);
11713 if (TREE_CODE (basetype
) == TYPE_DECL
)
11714 basetype
= TREE_TYPE (basetype
);
11715 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
11717 error ("base type %qT fails to be a struct or class type",
11722 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
11723 TYPE_FOR_JAVA (ref
) = 1;
11725 base_binfo
= NULL_TREE
;
11726 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
11728 base_binfo
= TYPE_BINFO (basetype
);
11729 /* The original basetype could have been a typedef'd type. */
11730 basetype
= BINFO_TYPE (base_binfo
);
11732 /* Inherit flags from the base. */
11733 TYPE_HAS_NEW_OPERATOR (ref
)
11734 |= TYPE_HAS_NEW_OPERATOR (basetype
);
11735 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
11736 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
11737 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
11738 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
11739 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
11740 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
11741 CLASSTYPE_REPEATED_BASE_P (ref
)
11742 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
11745 /* We must do this test after we've seen through a typedef
11747 if (TYPE_MARKED_P (basetype
))
11749 if (basetype
== ref
)
11750 error ("recursive type %qT undefined", basetype
);
11752 error ("duplicate base type %qT invalid", basetype
);
11756 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
11757 /* Regenerate the pack expansion for the bases. */
11758 basetype
= make_pack_expansion (basetype
);
11760 TYPE_MARKED_P (basetype
) = 1;
11762 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
11763 &igo_prev
, via_virtual
);
11764 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
11765 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
11767 BINFO_BASE_APPEND (binfo
, base_binfo
);
11768 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
11771 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
11772 /* If we have space in the vbase vector, we must have shared at
11773 least one of them, and are therefore diamond shaped. */
11774 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
11776 /* Unmark all the types. */
11777 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
11778 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11779 TYPE_MARKED_P (ref
) = 0;
11781 /* Now see if we have a repeated base type. */
11782 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
11784 for (base_binfo
= binfo
; base_binfo
;
11785 base_binfo
= TREE_CHAIN (base_binfo
))
11787 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11789 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
11792 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
11794 for (base_binfo
= binfo
; base_binfo
;
11795 base_binfo
= TREE_CHAIN (base_binfo
))
11796 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11797 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11806 /* Copies the enum-related properties from type SRC to type DST.
11807 Used with the underlying type of an enum and the enum itself. */
11809 copy_type_enum (tree dst
, tree src
)
11811 TYPE_MIN_VALUE (dst
) = TYPE_MIN_VALUE (src
);
11812 TYPE_MAX_VALUE (dst
) = TYPE_MAX_VALUE (src
);
11813 TYPE_SIZE (dst
) = TYPE_SIZE (src
);
11814 TYPE_SIZE_UNIT (dst
) = TYPE_SIZE_UNIT (src
);
11815 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
11816 TYPE_PRECISION (dst
) = TYPE_PRECISION (src
);
11817 TYPE_ALIGN (dst
) = TYPE_ALIGN (src
);
11818 TYPE_USER_ALIGN (dst
) = TYPE_USER_ALIGN (src
);
11819 TYPE_UNSIGNED (dst
) = TYPE_UNSIGNED (src
);
11822 /* Begin compiling the definition of an enumeration type.
11825 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11827 UNDERLYING_TYPE is the type that will be used as the storage for
11828 the enumeration type. This should be NULL_TREE if no storage type
11831 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11833 if IS_NEW is not NULL, gets TRUE iff a new type is created.
11835 Returns the type object, as yet incomplete.
11836 Also records info about it so that build_enumerator
11837 may be used to declare the individual values as they are read. */
11840 start_enum (tree name
, tree enumtype
, tree underlying_type
,
11841 bool scoped_enum_p
, bool *is_new
)
11843 tree prevtype
= NULL_TREE
;
11844 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11848 /* [C++0x dcl.enum]p5:
11850 If not explicitly specified, the underlying type of a scoped
11851 enumeration type is int. */
11852 if (!underlying_type
&& scoped_enum_p
)
11853 underlying_type
= integer_type_node
;
11855 if (underlying_type
)
11856 underlying_type
= cv_unqualified (underlying_type
);
11858 /* If this is the real definition for a previous forward reference,
11859 fill in the contents in the same object that used to be the
11860 forward reference. */
11862 enumtype
= lookup_and_check_tag (enum_type
, name
,
11863 /*tag_scope=*/ts_current
,
11864 /*template_header_p=*/false);
11866 /* In case of a template_decl, the only check that should be deferred
11867 to instantiation time is the comparison of underlying types. */
11868 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
11870 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
11872 error_at (input_location
, "scoped/unscoped mismatch "
11873 "in enum %q#T", enumtype
);
11874 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
11875 "previous definition here");
11876 enumtype
= error_mark_node
;
11878 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
11880 error_at (input_location
, "underlying type mismatch "
11881 "in enum %q#T", enumtype
);
11882 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
11883 "previous definition here");
11884 enumtype
= error_mark_node
;
11886 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
11887 && !dependent_type_p (underlying_type
)
11888 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
11889 && !same_type_p (underlying_type
,
11890 ENUM_UNDERLYING_TYPE (enumtype
)))
11892 error_at (input_location
, "different underlying type "
11893 "in enum %q#T", enumtype
);
11894 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
11895 "previous definition here");
11896 underlying_type
= NULL_TREE
;
11900 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
11901 || processing_template_decl
)
11903 /* In case of error, make a dummy enum to allow parsing to
11905 if (enumtype
== error_mark_node
)
11907 name
= make_anon_name ();
11908 enumtype
= NULL_TREE
;
11911 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
11912 of an opaque enum, or an opaque enum of an already defined
11913 enumeration (C++0x only).
11914 In any other case, it'll be NULL_TREE. */
11920 prevtype
= enumtype
;
11921 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
11922 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
11923 if (enumtype
== error_mark_node
)
11924 return error_mark_node
;
11926 /* The enum is considered opaque until the opening '{' of the
11927 enumerator list. */
11928 SET_OPAQUE_ENUM_P (enumtype
, true);
11929 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
11932 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
11934 if (underlying_type
)
11936 if (CP_INTEGRAL_TYPE_P (underlying_type
))
11938 copy_type_enum (enumtype
, underlying_type
);
11939 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
11941 else if (dependent_type_p (underlying_type
))
11942 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
11944 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11945 underlying_type
, enumtype
);
11948 /* If into a template class, the returned enum is always the first
11949 declaration (opaque or not) seen. This way all the references to
11950 this type will be to the same declaration. The following ones are used
11951 only to check for definition errors. */
11952 if (prevtype
&& processing_template_decl
)
11958 /* After processing and defining all the values of an enumeration type,
11959 install their decls in the enumeration type.
11960 ENUMTYPE is the type object. */
11963 finish_enum_value_list (tree enumtype
)
11966 tree underlying_type
;
11969 tree minnode
, maxnode
;
11972 bool fixed_underlying_type_p
11973 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
11975 /* We built up the VALUES in reverse order. */
11976 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
11978 /* For an enum defined in a template, just set the type of the values;
11979 all further processing is postponed until the template is
11980 instantiated. We need to set the type so that tsubst of a CONST_DECL
11982 if (processing_template_decl
)
11984 for (values
= TYPE_VALUES (enumtype
);
11986 values
= TREE_CHAIN (values
))
11987 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
11991 /* Determine the minimum and maximum values of the enumerators. */
11992 if (TYPE_VALUES (enumtype
))
11994 minnode
= maxnode
= NULL_TREE
;
11996 for (values
= TYPE_VALUES (enumtype
);
11998 values
= TREE_CHAIN (values
))
12000 decl
= TREE_VALUE (values
);
12002 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12003 each enumerator has the type of its enumeration. Prior to the
12004 closing brace, the type of each enumerator is the type of its
12005 initializing value. */
12006 TREE_TYPE (decl
) = enumtype
;
12008 /* Update the minimum and maximum values, if appropriate. */
12009 value
= DECL_INITIAL (decl
);
12010 if (value
== error_mark_node
)
12011 value
= integer_zero_node
;
12012 /* Figure out what the minimum and maximum values of the
12013 enumerators are. */
12015 minnode
= maxnode
= value
;
12016 else if (tree_int_cst_lt (maxnode
, value
))
12018 else if (tree_int_cst_lt (value
, minnode
))
12025 If the enumerator-list is empty, the underlying type is as if
12026 the enumeration had a single enumerator with value 0. */
12027 minnode
= maxnode
= integer_zero_node
;
12029 if (!fixed_underlying_type_p
)
12031 /* Compute the number of bits require to represent all values of the
12032 enumeration. We must do this before the type of MINNODE and
12033 MAXNODE are transformed, since tree_int_cst_min_precision relies
12034 on the TREE_TYPE of the value it is passed. */
12035 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12036 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12037 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12038 int precision
= MAX (lowprec
, highprec
);
12040 bool use_short_enum
;
12042 /* Determine the underlying type of the enumeration.
12046 The underlying type of an enumeration is an integral type that
12047 can represent all the enumerator values defined in the
12048 enumeration. It is implementation-defined which integral type is
12049 used as the underlying type for an enumeration except that the
12050 underlying type shall not be larger than int unless the value of
12051 an enumerator cannot fit in an int or unsigned int.
12053 We use "int" or an "unsigned int" as the underlying type, even if
12054 a smaller integral type would work, unless the user has
12055 explicitly requested that we use the smallest possible type. The
12056 user can request that for all enumerations with a command line
12057 flag, or for just one enumeration with an attribute. */
12059 use_short_enum
= flag_short_enums
12060 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12062 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12066 underlying_type
= integer_types
[itk
];
12067 if (underlying_type
!= NULL_TREE
12068 && TYPE_PRECISION (underlying_type
) >= precision
12069 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12072 if (itk
== itk_none
)
12076 IF no integral type can represent all the enumerator values, the
12077 enumeration is ill-formed. */
12078 error ("no integral type can represent all of the enumerator values "
12079 "for %qT", enumtype
);
12080 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12081 underlying_type
= integer_types
[itk_unsigned_long_long
];
12086 The value of sizeof() applied to an enumeration type, an object
12087 of an enumeration type, or an enumerator, is the value of sizeof()
12088 applied to the underlying type. */
12089 copy_type_enum (enumtype
, underlying_type
);
12091 /* Compute the minimum and maximum values for the type.
12095 For an enumeration where emin is the smallest enumerator and emax
12096 is the largest, the values of the enumeration are the values of the
12097 underlying type in the range bmin to bmax, where bmin and bmax are,
12098 respectively, the smallest and largest values of the smallest bit-
12099 field that can store emin and emax. */
12101 /* The middle-end currently assumes that types with TYPE_PRECISION
12102 narrower than their underlying type are suitably zero or sign
12103 extended to fill their mode. Similarly, it assumes that the front
12104 end assures that a value of a particular type must be within
12105 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12107 We used to set these fields based on bmin and bmax, but that led
12108 to invalid assumptions like optimizing away bounds checking. So
12109 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12110 TYPE_MAX_VALUE to the values for the mode above and only restrict
12111 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12112 ENUM_UNDERLYING_TYPE (enumtype
)
12113 = build_distinct_type_copy (underlying_type
);
12114 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12115 set_min_and_max_values_for_integral_type
12116 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12118 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12119 if (flag_strict_enums
)
12120 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12124 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12126 /* Convert each of the enumerators to the type of the underlying
12127 type of the enumeration. */
12128 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12130 location_t saved_location
;
12132 decl
= TREE_VALUE (values
);
12133 saved_location
= input_location
;
12134 input_location
= DECL_SOURCE_LOCATION (decl
);
12135 if (fixed_underlying_type_p
)
12136 /* If the enumeration type has a fixed underlying type, we
12137 already checked all of the enumerator values. */
12138 value
= DECL_INITIAL (decl
);
12140 value
= perform_implicit_conversion (underlying_type
,
12141 DECL_INITIAL (decl
),
12142 tf_warning_or_error
);
12143 input_location
= saved_location
;
12145 /* Do not clobber shared ints. */
12146 value
= copy_node (value
);
12148 TREE_TYPE (value
) = enumtype
;
12149 DECL_INITIAL (decl
) = value
;
12152 /* Fix up all variant types of this enum type. */
12153 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12154 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12156 /* Finish debugging output for this type. */
12157 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12160 /* Finishes the enum type. This is called only the first time an
12161 enumeration is seen, be it opaque or odinary.
12162 ENUMTYPE is the type object. */
12165 finish_enum (tree enumtype
)
12167 if (processing_template_decl
)
12169 if (at_function_scope_p ())
12170 add_stmt (build_min (TAG_DEFN
, enumtype
));
12174 /* Here there should not be any variants of this type. */
12175 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12176 && !TYPE_NEXT_VARIANT (enumtype
));
12179 /* Build and install a CONST_DECL for an enumeration constant of the
12180 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12181 LOC is the location of NAME.
12182 Assignment of sequential values by default is handled here. */
12185 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12191 /* If the VALUE was erroneous, pretend it wasn't there; that will
12192 result in the enum being assigned the next value in sequence. */
12193 if (value
== error_mark_node
)
12196 /* Remove no-op casts from the value. */
12198 STRIP_TYPE_NOPS (value
);
12200 if (! processing_template_decl
)
12202 /* Validate and default VALUE. */
12203 if (value
!= NULL_TREE
)
12205 value
= cxx_constant_value (value
);
12207 if (TREE_CODE (value
) == INTEGER_CST
12208 && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12210 value
= perform_integral_promotions (value
);
12214 error ("enumerator value for %qD is not an integer constant", name
);
12219 /* Default based on previous value. */
12220 if (value
== NULL_TREE
)
12222 if (TYPE_VALUES (enumtype
))
12225 unsigned HOST_WIDE_INT lo
;
12229 /* C++03 7.2/4: If no initializer is specified for the first
12230 enumerator, the type is an unspecified integral
12231 type. Otherwise the type is the same as the type of the
12232 initializing value of the preceding enumerator unless the
12233 incremented value is not representable in that type, in
12234 which case the type is an unspecified integral type
12235 sufficient to contain the incremented value. */
12236 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12237 if (error_operand_p (prev_value
))
12238 value
= error_mark_node
;
12241 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
12242 TREE_INT_CST_HIGH (prev_value
),
12247 tree type
= TREE_TYPE (prev_value
);
12248 bool pos
= (TYPE_UNSIGNED (type
) || hi
>= 0);
12249 di
.low
= lo
; di
.high
= hi
;
12250 if (!double_int_fits_to_tree_p (type
, di
))
12253 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12255 type
= integer_types
[itk
];
12256 if (type
!= NULL_TREE
12257 && (pos
|| !TYPE_UNSIGNED (type
))
12258 && double_int_fits_to_tree_p (type
, di
))
12261 if (type
&& cxx_dialect
< cxx0x
12262 && itk
> itk_unsigned_long
)
12263 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12264 incremented enumerator value is too large for %<unsigned long%>" : "\
12265 incremented enumerator value is too large for %<long%>");
12267 if (type
== NULL_TREE
)
12270 value
= double_int_to_tree (type
, di
);
12275 error ("overflow in enumeration values at %qD", name
);
12276 value
= error_mark_node
;
12281 value
= integer_zero_node
;
12284 /* Remove no-op casts from the value. */
12285 STRIP_TYPE_NOPS (value
);
12287 /* If the underlying type of the enum is fixed, check whether
12288 the enumerator values fits in the underlying type. If it
12289 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12290 if (ENUM_UNDERLYING_TYPE (enumtype
)
12292 && TREE_CODE (value
) == INTEGER_CST
12293 && !int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12295 error ("enumerator value %E is too large for underlying type %<%T%>",
12296 value
, ENUM_UNDERLYING_TYPE (enumtype
));
12298 /* Silently convert the value so that we can continue. */
12299 value
= perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype
),
12304 /* C++ associates enums with global, function, or class declarations. */
12305 context
= current_scope ();
12307 /* Build the actual enumeration constant. Note that the enumeration
12308 constants have the underlying type of the enum (if it is fixed)
12309 or the type of their initializer (if the underlying type of the
12310 enum is not fixed):
12314 If the underlying type is fixed, the type of each enumerator
12315 prior to the closing brace is the underlying type; if the
12316 initializing value of an enumerator cannot be represented by
12317 the underlying type, the program is ill-formed. If the
12318 underlying type is not fixed, the type of each enumerator is
12319 the type of its initializing value.
12321 If the underlying type is not fixed, it will be computed by
12322 finish_enum and we will reset the type of this enumerator. Of
12323 course, if we're processing a template, there may be no value. */
12324 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12326 if (context
&& context
== current_class_type
)
12327 /* This enum declaration is local to the class. We need the full
12328 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12329 decl
= build_lang_decl_loc (loc
, CONST_DECL
, name
, type
);
12331 /* It's a global enum, or it's local to a function. (Note local to
12332 a function could mean local to a class method. */
12333 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12335 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
12336 TREE_CONSTANT (decl
) = 1;
12337 TREE_READONLY (decl
) = 1;
12338 DECL_INITIAL (decl
) = value
;
12340 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12341 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12342 on the TYPE_FIELDS list for `S'. (That's so that you can say
12343 things like `S::i' later.) */
12344 finish_member_declaration (decl
);
12348 /* Add this enumeration constant to the list for this type. */
12349 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12352 /* Look for an enumerator with the given NAME within the enumeration
12353 type ENUMTYPE. This routine is used primarily for qualified name
12354 lookup into an enumerator in C++0x, e.g.,
12356 enum class Color { Red, Green, Blue };
12358 Color color = Color::Red;
12360 Returns the value corresponding to the enumerator, or
12361 NULL_TREE if no such enumerator was found. */
12363 lookup_enumerator (tree enumtype
, tree name
)
12366 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12368 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12369 return e
? TREE_VALUE (e
) : NULL_TREE
;
12373 /* We're defining DECL. Make sure that its type is OK. */
12376 check_function_type (tree decl
, tree current_function_parms
)
12378 tree fntype
= TREE_TYPE (decl
);
12379 tree return_type
= complete_type (TREE_TYPE (fntype
));
12381 /* In a function definition, arg types must be complete. */
12382 require_complete_types_for_parms (current_function_parms
);
12384 if (dependent_type_p (return_type
))
12386 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12387 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12389 tree args
= TYPE_ARG_TYPES (fntype
);
12391 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12392 error ("return type %q#T is incomplete", return_type
);
12394 error ("return type has Java class type %q#T", return_type
);
12396 /* Make it return void instead. */
12397 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12398 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12400 TREE_CHAIN (args
));
12402 fntype
= build_function_type (void_type_node
, args
);
12404 = build_exception_variant (fntype
,
12405 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12406 fntype
= (cp_build_type_attribute_variant
12407 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12408 TREE_TYPE (decl
) = fntype
;
12411 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12414 /* Create the FUNCTION_DECL for a function definition.
12415 DECLSPECS and DECLARATOR are the parts of the declaration;
12416 they describe the function's name and the type it returns,
12417 but twisted together in a fashion that parallels the syntax of C.
12419 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12420 DECLARATOR is really the DECL for the function we are about to
12421 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12422 indicating that the function is an inline defined in-class.
12424 This function creates a binding context for the function body
12425 as well as setting up the FUNCTION_DECL in current_function_decl.
12427 For C++, we must first check whether that datum makes any sense.
12428 For example, "class A local_a(1,2);" means that variable local_a
12429 is an aggregate of type A, which should have a constructor
12430 applied to it with the argument list [1, 2].
12432 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12433 or may be a BLOCK if the function has been defined previously
12434 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12435 error_mark_node if the function has never been defined, or
12436 a BLOCK if the function has been defined somewhere. */
12439 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
12441 tree ctype
= NULL_TREE
;
12444 int doing_friend
= 0;
12445 cp_binding_level
*bl
;
12446 tree current_function_parms
;
12447 struct c_fileinfo
*finfo
12448 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
12449 bool honor_interface
;
12451 /* Sanity check. */
12452 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
12453 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
12455 fntype
= TREE_TYPE (decl1
);
12456 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12457 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12459 /* ISO C++ 11.4/5. A friend function defined in a class is in
12460 the (lexical) scope of the class in which it is defined. */
12461 if (!ctype
&& DECL_FRIEND_P (decl1
))
12463 ctype
= DECL_FRIEND_CONTEXT (decl1
);
12465 /* CTYPE could be null here if we're dealing with a template;
12466 for example, `inline friend float foo()' inside a template
12467 will have no CTYPE set. */
12468 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
12474 if (DECL_DECLARED_INLINE_P (decl1
)
12475 && lookup_attribute ("noinline", attrs
))
12476 warning (0, "inline function %q+D given attribute noinline", decl1
);
12478 /* Handle gnu_inline attribute. */
12479 if (GNU_INLINE_P (decl1
))
12481 DECL_EXTERNAL (decl1
) = 1;
12482 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
12483 DECL_INTERFACE_KNOWN (decl1
) = 1;
12484 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
12487 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
12488 /* This is a constructor, we must ensure that any default args
12489 introduced by this definition are propagated to the clones
12490 now. The clones are used directly in overload resolution. */
12491 adjust_clone_args (decl1
);
12493 /* Sometimes we don't notice that a function is a static member, and
12494 build a METHOD_TYPE for it. Fix that up now. */
12495 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
12496 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
12498 /* Set up current_class_type, and enter the scope of the class, if
12501 push_nested_class (ctype
);
12502 else if (DECL_STATIC_FUNCTION_P (decl1
))
12503 push_nested_class (DECL_CONTEXT (decl1
));
12505 /* Now that we have entered the scope of the class, we must restore
12506 the bindings for any template parameters surrounding DECL1, if it
12507 is an inline member template. (Order is important; consider the
12508 case where a template parameter has the same name as a field of
12509 the class.) It is not until after this point that
12510 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12511 if (flags
& SF_INCLASS_INLINE
)
12512 maybe_begin_member_template_processing (decl1
);
12514 /* Effective C++ rule 15. */
12516 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
12517 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
12518 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
12520 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12521 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12522 if (!DECL_INITIAL (decl1
))
12523 DECL_INITIAL (decl1
) = error_mark_node
;
12525 /* This function exists in static storage.
12526 (This does not mean `static' in the C sense!) */
12527 TREE_STATIC (decl1
) = 1;
12529 /* We must call push_template_decl after current_class_type is set
12530 up. (If we are processing inline definitions after exiting a
12531 class scope, current_class_type will be NULL_TREE until set above
12532 by push_nested_class.) */
12533 if (processing_template_decl
)
12535 /* FIXME: Handle error_mark_node more gracefully. */
12536 tree newdecl1
= push_template_decl (decl1
);
12537 if (newdecl1
!= error_mark_node
)
12541 /* We are now in the scope of the function being defined. */
12542 current_function_decl
= decl1
;
12544 /* Save the parm names or decls from this function's declarator
12545 where store_parm_decls will find them. */
12546 current_function_parms
= DECL_ARGUMENTS (decl1
);
12548 /* Make sure the parameter and return types are reasonable. When
12549 you declare a function, these types can be incomplete, but they
12550 must be complete when you define the function. */
12551 check_function_type (decl1
, current_function_parms
);
12553 /* Build the return declaration for the function. */
12554 restype
= TREE_TYPE (fntype
);
12555 if (DECL_RESULT (decl1
) == NULL_TREE
)
12559 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
12560 DECL_ARTIFICIAL (resdecl
) = 1;
12561 DECL_IGNORED_P (resdecl
) = 1;
12562 DECL_RESULT (decl1
) = resdecl
;
12564 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
12567 /* Let the user know we're compiling this function. */
12568 announce_function (decl1
);
12570 /* Record the decl so that the function name is defined.
12571 If we already have a decl for this name, and it is a FUNCTION_DECL,
12572 use the old decl. */
12573 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
12575 /* A specialization is not used to guide overload resolution. */
12576 if (!DECL_FUNCTION_MEMBER_P (decl1
)
12577 && !(DECL_USE_TEMPLATE (decl1
) &&
12578 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
12580 tree olddecl
= pushdecl (decl1
);
12582 if (olddecl
== error_mark_node
)
12583 /* If something went wrong when registering the declaration,
12584 use DECL1; we have to have a FUNCTION_DECL to use when
12585 parsing the body of the function. */
12589 /* Otherwise, OLDDECL is either a previous declaration
12590 of the same function or DECL1 itself. */
12592 if (warn_missing_declarations
12593 && olddecl
== decl1
12594 && !DECL_MAIN_P (decl1
)
12595 && TREE_PUBLIC (decl1
)
12596 && !DECL_DECLARED_INLINE_P (decl1
))
12600 /* Check whether DECL1 is in an anonymous
12602 for (context
= DECL_CONTEXT (decl1
);
12604 context
= DECL_CONTEXT (context
))
12606 if (TREE_CODE (context
) == NAMESPACE_DECL
12607 && DECL_NAME (context
) == NULL_TREE
)
12611 if (context
== NULL
)
12612 warning (OPT_Wmissing_declarations
,
12613 "no previous declaration for %q+D", decl1
);
12621 /* We need to set the DECL_CONTEXT. */
12622 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
12623 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
12625 fntype
= TREE_TYPE (decl1
);
12627 /* If #pragma weak applies, mark the decl appropriately now.
12628 The pragma only applies to global functions. Because
12629 determining whether or not the #pragma applies involves
12630 computing the mangled name for the declaration, we cannot
12631 apply the pragma until after we have merged this declaration
12632 with any previous declarations; if the original declaration
12633 has a linkage specification, that specification applies to
12634 the definition as well, and may affect the mangled name. */
12635 if (DECL_FILE_SCOPE_P (decl1
))
12636 maybe_apply_pragma_weak (decl1
);
12639 /* constexpr functions must have literal argument types and
12640 literal return type. */
12641 validate_constexpr_fundecl (decl1
);
12643 /* Reset this in case the call to pushdecl changed it. */
12644 current_function_decl
= decl1
;
12646 gcc_assert (DECL_INITIAL (decl1
));
12648 /* This function may already have been parsed, in which case just
12649 return; our caller will skip over the body without parsing. */
12650 if (DECL_INITIAL (decl1
) != error_mark_node
)
12653 /* Initialize RTL machinery. We cannot do this until
12654 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12655 even when processing a template; this is how we get
12656 CFUN set up, and our per-function variables initialized.
12657 FIXME factor out the non-RTL stuff. */
12658 bl
= current_binding_level
;
12659 allocate_struct_function (decl1
, processing_template_decl
);
12661 /* Initialize the language data structures. Whenever we start
12662 a new function, we destroy temporaries in the usual way. */
12663 cfun
->language
= ggc_alloc_cleared_language_function ();
12664 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
12665 current_binding_level
= bl
;
12667 /* Start the statement-tree, start the tree now. */
12668 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
12670 /* If we are (erroneously) defining a function that we have already
12671 defined before, wipe out what we knew before. */
12672 if (!DECL_PENDING_INLINE_P (decl1
))
12673 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
12675 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
12677 /* We know that this was set up by `grokclassfn'. We do not
12678 wait until `store_parm_decls', since evil parse errors may
12679 never get us to that point. Here we keep the consistency
12680 between `current_class_type' and `current_class_ptr'. */
12681 tree t
= DECL_ARGUMENTS (decl1
);
12683 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
12684 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
12686 cp_function_chain
->x_current_class_ref
12687 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
12688 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
12689 cp_function_chain
->x_current_class_ptr
= t
;
12691 /* Constructors and destructors need to know whether they're "in
12692 charge" of initializing virtual base classes. */
12693 t
= DECL_CHAIN (t
);
12694 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
12696 current_in_charge_parm
= t
;
12697 t
= DECL_CHAIN (t
);
12699 if (DECL_HAS_VTT_PARM_P (decl1
))
12701 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
12702 current_vtt_parm
= t
;
12706 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
12707 /* Implicitly-defined methods (like the
12708 destructor for a class in which no destructor
12709 is explicitly declared) must not be defined
12710 until their definition is needed. So, we
12711 ignore interface specifications for
12712 compiler-generated functions. */
12713 && !DECL_ARTIFICIAL (decl1
));
12715 if (processing_template_decl
)
12716 /* Don't mess with interface flags. */;
12717 else if (DECL_INTERFACE_KNOWN (decl1
))
12719 tree ctx
= decl_function_context (decl1
);
12721 if (DECL_NOT_REALLY_EXTERN (decl1
))
12722 DECL_EXTERNAL (decl1
) = 0;
12724 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
12725 && TREE_PUBLIC (ctx
))
12726 /* This is a function in a local class in an extern inline
12728 comdat_linkage (decl1
);
12730 /* If this function belongs to an interface, it is public.
12731 If it belongs to someone else's interface, it is also external.
12732 This only affects inlines and template instantiations. */
12733 else if (!finfo
->interface_unknown
&& honor_interface
)
12735 if (DECL_DECLARED_INLINE_P (decl1
)
12736 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12738 DECL_EXTERNAL (decl1
)
12739 = (finfo
->interface_only
12740 || (DECL_DECLARED_INLINE_P (decl1
)
12741 && ! flag_implement_inlines
12742 && !DECL_VINDEX (decl1
)));
12744 /* For WIN32 we also want to put these in linkonce sections. */
12745 maybe_make_one_only (decl1
);
12748 DECL_EXTERNAL (decl1
) = 0;
12749 DECL_INTERFACE_KNOWN (decl1
) = 1;
12750 /* If this function is in an interface implemented in this file,
12751 make sure that the back end knows to emit this function
12753 if (!DECL_EXTERNAL (decl1
))
12754 mark_needed (decl1
);
12756 else if (finfo
->interface_unknown
&& finfo
->interface_only
12757 && honor_interface
)
12759 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12760 interface, we will have both finfo->interface_unknown and
12761 finfo->interface_only set. In that case, we don't want to
12762 use the normal heuristics because someone will supply a
12763 #pragma implementation elsewhere, and deducing it here would
12764 produce a conflict. */
12765 comdat_linkage (decl1
);
12766 DECL_EXTERNAL (decl1
) = 0;
12767 DECL_INTERFACE_KNOWN (decl1
) = 1;
12768 DECL_DEFER_OUTPUT (decl1
) = 1;
12772 /* This is a definition, not a reference.
12773 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12774 if (!GNU_INLINE_P (decl1
))
12775 DECL_EXTERNAL (decl1
) = 0;
12777 if ((DECL_DECLARED_INLINE_P (decl1
)
12778 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12779 && ! DECL_INTERFACE_KNOWN (decl1
))
12780 DECL_DEFER_OUTPUT (decl1
) = 1;
12782 DECL_INTERFACE_KNOWN (decl1
) = 1;
12785 /* Determine the ELF visibility attribute for the function. We must not
12786 do this before calling "pushdecl", as we must allow "duplicate_decls"
12787 to merge any attributes appropriately. We also need to wait until
12789 if (!DECL_CLONED_FUNCTION_P (decl1
))
12790 determine_visibility (decl1
);
12792 begin_scope (sk_function_parms
, decl1
);
12796 if (DECL_DESTRUCTOR_P (decl1
)
12797 || (DECL_CONSTRUCTOR_P (decl1
)
12798 && targetm
.cxx
.cdtor_returns_this ()))
12800 cdtor_label
= build_decl (input_location
,
12801 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
12802 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
12805 start_fname_decls ();
12807 store_parm_decls (current_function_parms
);
12811 /* Like start_preparsed_function, except that instead of a
12812 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12814 Returns 1 on success. If the DECLARATOR is not suitable for a function
12815 (it defines a datum instead), we return 0, which tells
12816 yyparse to report a parse error. */
12819 start_function (cp_decl_specifier_seq
*declspecs
,
12820 const cp_declarator
*declarator
,
12825 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
12826 if (decl1
== error_mark_node
)
12828 /* If the declarator is not suitable for a function definition,
12829 cause a syntax error. */
12830 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
12832 error ("invalid function declaration");
12836 if (DECL_MAIN_P (decl1
))
12837 /* main must return int. grokfndecl should have corrected it
12838 (and issued a diagnostic) if the user got it wrong. */
12839 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
12840 integer_type_node
));
12842 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
12847 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12851 use_eh_spec_block (tree fn
)
12853 return (flag_exceptions
&& flag_enforce_eh_specs
12854 && !processing_template_decl
12855 && !type_throw_all_p (TREE_TYPE (fn
))
12856 /* We insert the EH_SPEC_BLOCK only in the original
12857 function; then, it is copied automatically to the
12859 && !DECL_CLONED_FUNCTION_P (fn
)
12860 /* Implicitly-generated constructors and destructors have
12861 exception specifications. However, those specifications
12862 are the union of the possible exceptions specified by the
12863 constructors/destructors for bases and members, so no
12864 unallowed exception will ever reach this function. By
12865 not creating the EH_SPEC_BLOCK we save a little memory,
12866 and we avoid spurious warnings about unreachable
12868 && !DECL_DEFAULTED_FN (fn
));
12871 /* Store the parameter declarations into the current function declaration.
12872 This is called after parsing the parameter declarations, before
12873 digesting the body of the function.
12875 Also install to binding contour return value identifier, if any. */
12878 store_parm_decls (tree current_function_parms
)
12880 tree fndecl
= current_function_decl
;
12883 /* This is a chain of any other decls that came in among the parm
12884 declarations. If a parm is declared with enum {foo, bar} x;
12885 then CONST_DECLs for foo and bar are put here. */
12886 tree nonparms
= NULL_TREE
;
12888 if (current_function_parms
)
12890 /* This case is when the function was defined with an ANSI prototype.
12891 The parms already have decls, so we need not do anything here
12892 except record them as in effect
12893 and complain if any redundant old-style parm decls were written. */
12895 tree specparms
= current_function_parms
;
12898 /* Must clear this because it might contain TYPE_DECLs declared
12900 current_binding_level
->names
= NULL
;
12902 /* If we're doing semantic analysis, then we'll call pushdecl
12903 for each of these. We must do them in reverse order so that
12904 they end in the correct forward order. */
12905 specparms
= nreverse (specparms
);
12907 for (parm
= specparms
; parm
; parm
= next
)
12909 next
= DECL_CHAIN (parm
);
12910 if (TREE_CODE (parm
) == PARM_DECL
)
12912 if (DECL_NAME (parm
) == NULL_TREE
12913 || TREE_CODE (parm
) != VOID_TYPE
)
12916 error ("parameter %qD declared void", parm
);
12920 /* If we find an enum constant or a type tag,
12921 put it aside for the moment. */
12922 TREE_CHAIN (parm
) = NULL_TREE
;
12923 nonparms
= chainon (nonparms
, parm
);
12927 /* Get the decls in their original chain order and record in the
12928 function. This is all and only the PARM_DECLs that were
12929 pushed into scope by the loop above. */
12930 DECL_ARGUMENTS (fndecl
) = getdecls ();
12933 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
12935 /* Now store the final chain of decls for the arguments
12936 as the decl-chain of the current lexical scope.
12937 Put the enumerators in as well, at the front so that
12938 DECL_ARGUMENTS is not modified. */
12939 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
12941 if (use_eh_spec_block (current_function_decl
))
12942 current_eh_spec_block
= begin_eh_spec_block ();
12946 /* We have finished doing semantic analysis on DECL, but have not yet
12947 generated RTL for its body. Save away our current state, so that
12948 when we want to generate RTL later we know what to do. */
12951 save_function_data (tree decl
)
12953 struct language_function
*f
;
12955 /* Save the language-specific per-function data so that we can
12956 get it back when we really expand this function. */
12957 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
12960 f
= ggc_alloc_language_function ();
12961 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
12962 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
12964 /* Clear out the bits we don't need. */
12965 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
12966 f
->bindings
= NULL
;
12967 f
->x_local_names
= NULL
;
12971 /* Set the return value of the constructor (if present). */
12974 finish_constructor_body (void)
12979 if (targetm
.cxx
.cdtor_returns_this ()
12980 && (! TYPE_FOR_JAVA (current_class_type
)))
12982 /* Any return from a constructor will end up here. */
12983 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
12985 val
= DECL_ARGUMENTS (current_function_decl
);
12986 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
12987 DECL_RESULT (current_function_decl
), val
);
12988 /* Return the address of the object. */
12989 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
12990 add_stmt (exprstmt
);
12994 /* Do all the processing for the beginning of a destructor; set up the
12995 vtable pointers and cleanups for bases and members. */
12998 begin_destructor_body (void)
13000 tree compound_stmt
;
13002 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13003 issued an error message. We still want to try to process the
13004 body of the function, but initialize_vtbl_ptrs will crash if
13005 TYPE_BINFO is NULL. */
13006 if (COMPLETE_TYPE_P (current_class_type
))
13008 compound_stmt
= begin_compound_stmt (0);
13009 /* Make all virtual function table pointers in non-virtual base
13010 classes point to CURRENT_CLASS_TYPE's virtual function
13012 initialize_vtbl_ptrs (current_class_ptr
);
13013 finish_compound_stmt (compound_stmt
);
13015 /* And insert cleanups for our bases and members so that they
13016 will be properly destroyed if we throw. */
13017 push_base_cleanups ();
13021 /* At the end of every destructor we generate code to delete the object if
13022 necessary. Do that now. */
13025 finish_destructor_body (void)
13029 /* Any return from a destructor will end up here; that way all base
13030 and member cleanups will be run when the function returns. */
13031 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13033 /* In a virtual destructor, we must call delete. */
13034 if (DECL_VIRTUAL_P (current_function_decl
))
13037 tree virtual_size
= cxx_sizeof (current_class_type
);
13041 At the point of definition of a virtual destructor (including
13042 an implicit definition), non-placement operator delete shall
13043 be looked up in the scope of the destructor's class and if
13044 found shall be accessible and unambiguous. */
13045 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
13047 /*global_p=*/false,
13048 /*placement=*/NULL_TREE
,
13049 /*alloc_fn=*/NULL_TREE
);
13051 if_stmt
= begin_if_stmt ();
13052 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13053 current_in_charge_parm
,
13056 finish_expr_stmt (exprstmt
);
13057 finish_then_clause (if_stmt
);
13058 finish_if_stmt (if_stmt
);
13061 if (targetm
.cxx
.cdtor_returns_this ())
13065 val
= DECL_ARGUMENTS (current_function_decl
);
13066 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13067 DECL_RESULT (current_function_decl
), val
);
13068 /* Return the address of the object. */
13069 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13070 add_stmt (exprstmt
);
13074 /* Do the necessary processing for the beginning of a function body, which
13075 in this case includes member-initializers, but not the catch clauses of
13076 a function-try-block. Currently, this means opening a binding level
13077 for the member-initializers (in a ctor), member cleanups (in a dtor),
13078 and capture proxies (in a lambda operator()). */
13081 begin_function_body (void)
13085 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13088 if (processing_template_decl
)
13089 /* Do nothing now. */;
13091 /* Always keep the BLOCK node associated with the outermost pair of
13092 curly braces of a function. These are needed for correct
13093 operation of dwarfout.c. */
13094 keep_next_level (true);
13096 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13098 if (processing_template_decl
)
13099 /* Do nothing now. */;
13100 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13101 begin_destructor_body ();
13106 /* Do the processing for the end of a function body. Currently, this means
13107 closing out the cleanups for fully-constructed bases and members, and in
13108 the case of the destructor, deleting the object if desired. Again, this
13109 is only meaningful for [cd]tors, since they are the only functions where
13110 there is a significant distinction between the main body and any
13111 function catch clauses. Handling, say, main() return semantics here
13112 would be wrong, as flowing off the end of a function catch clause for
13113 main() would also need to return 0. */
13116 finish_function_body (tree compstmt
)
13118 if (compstmt
== NULL_TREE
)
13121 /* Close the block. */
13122 finish_compound_stmt (compstmt
);
13124 if (processing_template_decl
)
13125 /* Do nothing now. */;
13126 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13127 finish_constructor_body ();
13128 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13129 finish_destructor_body ();
13132 /* Given a function, returns the BLOCK corresponding to the outermost level
13133 of curly braces, skipping the artificial block created for constructor
13137 outer_curly_brace_block (tree fndecl
)
13139 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13140 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13141 /* Skip the artificial function body block. */
13142 block
= BLOCK_SUBBLOCKS (block
);
13146 /* If FNDECL is a class's key method, add the class to the list of
13147 keyed classes that should be emitted. */
13150 record_key_method_defined (tree fndecl
)
13152 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13153 && DECL_VIRTUAL_P (fndecl
)
13154 && !processing_template_decl
)
13156 tree fnclass
= DECL_CONTEXT (fndecl
);
13157 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13158 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13162 /* Subroutine of finish_function.
13163 Save the body of constexpr functions for possible
13164 future compile time evaluation. */
13167 maybe_save_function_definition (tree fun
)
13169 if (!processing_template_decl
13170 && DECL_DECLARED_CONSTEXPR_P (fun
)
13171 && !DECL_CLONED_FUNCTION_P (fun
))
13172 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13175 /* Finish up a function declaration and compile that function
13176 all the way to assembler language output. The free the storage
13177 for the function definition.
13179 FLAGS is a bitwise or of the following values:
13181 We just finished processing the body of an in-class inline
13182 function definition. (This processing will have taken place
13183 after the class definition is complete.) */
13186 finish_function (int flags
)
13188 tree fndecl
= current_function_decl
;
13189 tree fntype
, ctype
= NULL_TREE
;
13190 int inclass_inline
= (flags
& 2) != 0;
13192 /* When we get some parse errors, we can end up without a
13193 current_function_decl, so cope. */
13194 if (fndecl
== NULL_TREE
)
13195 return error_mark_node
;
13197 if (c_dialect_objc ())
13198 objc_finish_function ();
13200 gcc_assert (!defer_mark_used_calls
);
13201 defer_mark_used_calls
= true;
13203 record_key_method_defined (fndecl
);
13205 fntype
= TREE_TYPE (fndecl
);
13207 /* TREE_READONLY (fndecl) = 1;
13208 This caused &foo to be of type ptr-to-const-function
13209 which then got a warning when stored in a ptr-to-function variable. */
13211 gcc_assert (building_stmt_list_p ());
13212 /* The current function is being defined, so its DECL_INITIAL should
13213 be set, and unless there's a multiple definition, it should be
13214 error_mark_node. */
13215 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13217 /* For a cloned function, we've already got all the code we need;
13218 there's no need to add any extra bits. */
13219 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13221 if (DECL_MAIN_P (current_function_decl
))
13225 /* Make it so that `main' always returns 0 by default (or
13228 stmt
= finish_return_stmt (integer_one_node
);
13230 stmt
= finish_return_stmt (integer_zero_node
);
13232 /* Hack. We don't want the middle-end to warn that this
13233 return is unreachable, so put the statement on the
13236 location_t linezero
= linemap_line_start (line_table
, 0, 1);
13237 SET_EXPR_LOCATION (stmt
, linezero
);
13241 if (use_eh_spec_block (current_function_decl
))
13242 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13243 (TREE_TYPE (current_function_decl
)),
13244 current_eh_spec_block
);
13247 /* If we're saving up tree structure, tie off the function now. */
13248 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13250 finish_fname_decls ();
13252 /* If this function can't throw any exceptions, remember that. */
13253 if (!processing_template_decl
13254 && !cp_function_chain
->can_throw
13255 && !flag_non_call_exceptions
13256 && !decl_replaceable_p (fndecl
))
13257 TREE_NOTHROW (fndecl
) = 1;
13259 /* This must come after expand_function_end because cleanups might
13260 have declarations (from inline functions) that need to go into
13261 this function's blocks. */
13263 /* If the current binding level isn't the outermost binding level
13264 for this function, either there is a bug, or we have experienced
13265 syntax errors and the statement tree is malformed. */
13266 if (current_binding_level
->kind
!= sk_function_parms
)
13268 /* Make sure we have already experienced errors. */
13269 gcc_assert (errorcount
);
13271 /* Throw away the broken statement tree and extra binding
13273 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13275 while (current_binding_level
->kind
!= sk_function_parms
)
13277 if (current_binding_level
->kind
== sk_class
)
13278 pop_nested_class ();
13280 poplevel (0, 0, 0);
13283 poplevel (1, 0, 1);
13285 /* Statements should always be full-expressions at the outermost set
13286 of curly braces for a function. */
13287 gcc_assert (stmts_are_full_exprs_p ());
13289 /* Save constexpr function body before it gets munged by
13290 the NRV transformation. */
13291 maybe_save_function_definition (fndecl
);
13293 /* Set up the named return value optimization, if we can. Candidate
13294 variables are selected in check_return_expr. */
13295 if (current_function_return_value
)
13297 tree r
= current_function_return_value
;
13300 if (r
!= error_mark_node
13301 /* This is only worth doing for fns that return in memory--and
13302 simpler, since we don't have to worry about promoted modes. */
13303 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13304 /* Only allow this for variables declared in the outer scope of
13305 the function so we know that their lifetime always ends with a
13306 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13307 we were to do this optimization in tree-ssa. */
13308 && (outer
= outer_curly_brace_block (fndecl
))
13309 && chain_member (r
, BLOCK_VARS (outer
)))
13310 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13312 current_function_return_value
= NULL_TREE
;
13315 /* Remember that we were in class scope. */
13316 if (current_class_name
)
13317 ctype
= current_class_type
;
13319 /* Must mark the RESULT_DECL as being in this function. */
13320 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13322 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13323 to the FUNCTION_DECL node itself. */
13324 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13326 /* Save away current state, if appropriate. */
13327 if (!processing_template_decl
)
13328 save_function_data (fndecl
);
13330 /* Complain if there's just no return statement. */
13331 if (warn_return_type
13332 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
13333 && !dependent_type_p (TREE_TYPE (fntype
))
13334 && !current_function_returns_value
&& !current_function_returns_null
13335 /* Don't complain if we abort or throw. */
13336 && !current_function_returns_abnormally
13337 /* Don't complain if we are declared noreturn. */
13338 && !TREE_THIS_VOLATILE (fndecl
)
13339 && !DECL_NAME (DECL_RESULT (fndecl
))
13340 && !TREE_NO_WARNING (fndecl
)
13341 /* Structor return values (if any) are set by the compiler. */
13342 && !DECL_CONSTRUCTOR_P (fndecl
)
13343 && !DECL_DESTRUCTOR_P (fndecl
))
13345 warning (OPT_Wreturn_type
,
13346 "no return statement in function returning non-void");
13347 TREE_NO_WARNING (fndecl
) = 1;
13350 /* Store the end of the function, so that we get good line number
13351 info for the epilogue. */
13352 cfun
->function_end_locus
= input_location
;
13354 /* Complain about parameters that are only set, but never otherwise used. */
13355 if (warn_unused_but_set_parameter
13356 && !processing_template_decl
13357 && errorcount
== unused_but_set_errorcount
13358 && !DECL_CLONED_FUNCTION_P (fndecl
))
13362 for (decl
= DECL_ARGUMENTS (fndecl
);
13364 decl
= DECL_CHAIN (decl
))
13365 if (TREE_USED (decl
)
13366 && TREE_CODE (decl
) == PARM_DECL
13367 && !DECL_READ_P (decl
)
13368 && DECL_NAME (decl
)
13369 && !DECL_ARTIFICIAL (decl
)
13370 && !TREE_NO_WARNING (decl
)
13371 && !DECL_IN_SYSTEM_HEADER (decl
)
13372 && TREE_TYPE (decl
) != error_mark_node
13373 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13374 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13375 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13376 warning (OPT_Wunused_but_set_parameter
,
13377 "parameter %q+D set but not used", decl
);
13378 unused_but_set_errorcount
= errorcount
;
13381 /* Genericize before inlining. */
13382 if (!processing_template_decl
)
13384 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13385 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13386 cp_genericize (fndecl
);
13387 /* Clear out the bits we don't need. */
13388 f
->x_current_class_ptr
= NULL
;
13389 f
->x_current_class_ref
= NULL
;
13390 f
->x_eh_spec_block
= NULL
;
13391 f
->x_in_charge_parm
= NULL
;
13392 f
->x_vtt_parm
= NULL
;
13393 f
->x_return_value
= NULL
;
13394 f
->bindings
= NULL
;
13395 f
->extern_decl_map
= NULL
;
13397 /* Clear out the bits we don't need. */
13398 local_names
= NULL
;
13400 /* We're leaving the context of this function, so zap cfun. It's still in
13401 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13403 current_function_decl
= NULL
;
13405 /* If this is an in-class inline definition, we may have to pop the
13406 bindings for the template parameters that we added in
13407 maybe_begin_member_template_processing when start_function was
13409 if (inclass_inline
)
13410 maybe_end_member_template_processing ();
13412 /* Leave the scope of the class. */
13414 pop_nested_class ();
13419 current_function_decl
= NULL_TREE
;
13421 defer_mark_used_calls
= false;
13422 if (deferred_mark_used_calls
)
13427 FOR_EACH_VEC_ELT (tree
, deferred_mark_used_calls
, i
, decl
)
13429 VEC_free (tree
, gc
, deferred_mark_used_calls
);
13435 /* Create the FUNCTION_DECL for a function definition.
13436 DECLSPECS and DECLARATOR are the parts of the declaration;
13437 they describe the return type and the name of the function,
13438 but twisted together in a fashion that parallels the syntax of C.
13440 This function creates a binding context for the function body
13441 as well as setting up the FUNCTION_DECL in current_function_decl.
13443 Returns a FUNCTION_DECL on success.
13445 If the DECLARATOR is not suitable for a function (it defines a datum
13446 instead), we return 0, which tells yyparse to report a parse error.
13448 May return void_type_node indicating that this method is actually
13449 a friend. See grokfield for more details.
13451 Came here with a `.pushlevel' .
13453 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13454 CHANGES TO CODE IN `grokfield'. */
13457 grokmethod (cp_decl_specifier_seq
*declspecs
,
13458 const cp_declarator
*declarator
, tree attrlist
)
13460 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
13463 if (fndecl
== error_mark_node
)
13464 return error_mark_node
;
13466 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
13468 error ("invalid member function declaration");
13469 return error_mark_node
;
13473 cplus_decl_attributes (&fndecl
, attrlist
, 0);
13475 /* Pass friends other than inline friend functions back. */
13476 if (fndecl
== void_type_node
)
13479 if (DECL_IN_AGGR_P (fndecl
))
13481 if (DECL_CLASS_SCOPE_P (fndecl
))
13482 error ("%qD is already defined in class %qT", fndecl
,
13483 DECL_CONTEXT (fndecl
));
13484 return error_mark_node
;
13487 check_template_shadow (fndecl
);
13489 DECL_DECLARED_INLINE_P (fndecl
) = 1;
13490 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
13492 /* We process method specializations in finish_struct_1. */
13493 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
13495 fndecl
= push_template_decl (fndecl
);
13496 if (fndecl
== error_mark_node
)
13500 if (! DECL_FRIEND_P (fndecl
))
13502 if (DECL_CHAIN (fndecl
))
13504 fndecl
= copy_node (fndecl
);
13505 TREE_CHAIN (fndecl
) = NULL_TREE
;
13509 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
13511 DECL_IN_AGGR_P (fndecl
) = 1;
13516 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13517 we can lay it out later, when and if its type becomes complete. */
13520 maybe_register_incomplete_var (tree var
)
13522 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
13524 /* Keep track of variables with incomplete types. */
13525 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
13526 && DECL_EXTERNAL (var
))
13528 tree inner_type
= TREE_TYPE (var
);
13530 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
13531 inner_type
= TREE_TYPE (inner_type
);
13532 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
13534 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
13535 /* RTTI TD entries are created while defining the type_info. */
13536 || (TYPE_LANG_SPECIFIC (inner_type
)
13537 && TYPE_BEING_DEFINED (inner_type
)))
13540 = VEC_safe_push (incomplete_var
, gc
, incomplete_vars
, NULL
);
13542 iv
->incomplete_type
= inner_type
;
13547 /* Called when a class type (given by TYPE) is defined. If there are
13548 any existing VAR_DECLs whose type has been completed by this
13549 declaration, update them now. */
13552 complete_vars (tree type
)
13555 incomplete_var
*iv
;
13557 for (ix
= 0; VEC_iterate (incomplete_var
, incomplete_vars
, ix
, iv
); )
13559 if (same_type_p (type
, iv
->incomplete_type
))
13561 tree var
= iv
->decl
;
13562 tree type
= TREE_TYPE (var
);
13563 /* Complete the type of the variable. The VAR_DECL itself
13564 will be laid out in expand_expr. */
13565 complete_type (type
);
13566 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
13567 /* Remove this entry from the list. */
13568 VEC_unordered_remove (incomplete_var
, incomplete_vars
, ix
);
13574 /* Check for pending declarations which may have abstract type. */
13575 complete_type_check_abstract (type
);
13578 /* If DECL is of a type which needs a cleanup, build and return an
13579 expression to perform that cleanup here. Return NULL_TREE if no
13580 cleanup need be done. */
13583 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
13589 /* Assume no cleanup is required. */
13590 cleanup
= NULL_TREE
;
13592 if (error_operand_p (decl
))
13595 /* Handle "__attribute__((cleanup))". We run the cleanup function
13596 before the destructor since the destructor is what actually
13597 terminates the lifetime of the object. */
13598 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
13605 /* Get the name specified by the user for the cleanup function. */
13606 id
= TREE_VALUE (TREE_VALUE (attr
));
13607 /* Look up the name to find the cleanup function to call. It is
13608 important to use lookup_name here because that is what is
13609 used in c-common.c:handle_cleanup_attribute when performing
13610 initial checks on the attribute. Note that those checks
13611 include ensuring that the function found is not an overloaded
13612 function, or an object with an overloaded call operator,
13613 etc.; we can rely on the fact that the function found is an
13614 ordinary FUNCTION_DECL. */
13615 fn
= lookup_name (id
);
13616 arg
= build_address (decl
);
13618 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
13619 if (cleanup
== error_mark_node
)
13620 return error_mark_node
;
13622 /* Handle ordinary C++ destructors. */
13623 type
= TREE_TYPE (decl
);
13624 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
13626 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
13627 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
13628 && CLASSTYPE_VBASECLASSES (type
));
13632 if (TREE_CODE (type
) == ARRAY_TYPE
)
13635 addr
= build_address (decl
);
13637 /* Optimize for space over speed here. */
13638 if (!has_vbases
|| flag_expensive_optimizations
)
13639 flags
|= LOOKUP_NONVIRTUAL
;
13641 call
= build_delete (TREE_TYPE (addr
), addr
,
13642 sfk_complete_destructor
, flags
, 0, complain
);
13643 if (call
== error_mark_node
)
13644 cleanup
= error_mark_node
;
13646 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
13654 /* When a stmt has been parsed, this function is called. */
13661 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13662 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13663 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13666 static_fn_type (tree memfntype
)
13671 if (TYPE_PTRMEMFUNC_P (memfntype
))
13672 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
13673 if (POINTER_TYPE_P (memfntype
)
13674 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
13675 memfntype
= TREE_TYPE (memfntype
);
13676 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
13678 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
13679 args
= TYPE_ARG_TYPES (memfntype
);
13680 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
13681 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
));
13682 fntype
= (cp_build_type_attribute_variant
13683 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
13684 fntype
= (build_exception_variant
13685 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
13689 /* DECL was originally constructed as a non-static member function,
13690 but turned out to be static. Update it accordingly. */
13693 revert_static_member_fn (tree decl
)
13695 tree stype
= static_fn_type (decl
);
13696 cp_cv_quals quals
= type_memfn_quals (stype
);
13698 if (quals
!= TYPE_UNQUALIFIED
)
13699 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
);
13701 TREE_TYPE (decl
) = stype
;
13703 if (DECL_ARGUMENTS (decl
))
13704 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
13705 DECL_STATIC_FUNCTION_P (decl
) = 1;
13708 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13709 one of the language-independent trees. */
13711 enum cp_tree_node_structure_enum
13712 cp_tree_node_structure (union lang_tree_node
* t
)
13714 switch (TREE_CODE (&t
->generic
))
13716 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
13717 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
13718 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
13719 case OVERLOAD
: return TS_CP_OVERLOAD
;
13720 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
13721 case PTRMEM_CST
: return TS_CP_PTRMEM
;
13722 case BASELINK
: return TS_CP_BASELINK
;
13723 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
13724 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
13725 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
13726 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
13727 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
13728 default: return TS_CP_GENERIC
;
13732 /* Build the void_list_node (void_type_node having been created). */
13734 build_void_list_node (void)
13736 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
13741 cp_missing_noreturn_ok_p (tree decl
)
13743 /* A missing noreturn is ok for the `main' function. */
13744 return DECL_MAIN_P (decl
);
13747 /* Return the COMDAT group into which DECL should be placed. */
13750 cxx_comdat_group (tree decl
)
13754 /* Virtual tables, construction virtual tables, and virtual table
13755 tables all go in a single COMDAT group, named after the primary
13757 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
13758 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
13759 /* For all other DECLs, the COMDAT group is the mangled name of the
13760 declaration itself. */
13763 while (DECL_THUNK_P (decl
))
13765 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13766 into the same section as the target function. In that case
13767 we must return target's name. */
13768 tree target
= THUNK_TARGET (decl
);
13769 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
13770 && DECL_SECTION_NAME (target
) != NULL
13771 && DECL_ONE_ONLY (target
))
13776 name
= DECL_ASSEMBLER_NAME (decl
);
13782 #include "gt-cp-decl.h"