1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2015 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
31 #include "coretypes.h"
35 #include "tree-hasher.h"
36 #include "stringpool.h"
37 #include "stor-layout.h"
43 #include "tree-iterator.h"
44 #include "tree-inline.h"
50 #include "c-family/c-common.h"
51 #include "c-family/c-objc.h"
52 #include "c-family/c-pragma.h"
53 #include "c-family/c-target.h"
54 #include "c-family/c-ubsan.h"
55 #include "diagnostic.h"
59 #include "splay-tree.h"
61 #include "hard-reg-set.h"
67 /* Possible cases of bad specifiers type used by bad_specifiers. */
69 BSP_VAR
, /* variable */
70 BSP_PARM
, /* parameter */
75 static const char *redeclaration_error_message (tree
, tree
);
77 static int decl_jump_unsafe (tree
);
78 static void require_complete_types_for_parms (tree
);
79 static int ambi_op_p (enum tree_code
);
80 static int unary_op_p (enum tree_code
);
81 static void push_local_name (tree
);
82 static tree
grok_reference_init (tree
, tree
, tree
, int);
83 static tree
grokvardecl (tree
, tree
, tree
, const cp_decl_specifier_seq
*,
85 static int check_static_variable_definition (tree
, tree
);
86 static void record_unknown_type (tree
, const char *);
87 static tree
builtin_function_1 (tree
, tree
, bool);
88 static int member_function_or_else (tree
, tree
, enum overload_flags
);
89 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
91 static void check_for_uninitialized_const_var (tree
);
92 static tree
local_variable_p_walkfn (tree
*, int *, void *);
93 static tree
record_builtin_java_type (const char *, int);
94 static const char *tag_name (enum tag_types
);
95 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
96 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
97 static void maybe_deduce_size_from_array_init (tree
, tree
);
98 static void layout_var_decl (tree
);
99 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
100 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
101 static void save_function_data (tree
);
102 static void copy_type_enum (tree
, tree
);
103 static void check_function_type (tree
, tree
);
104 static void finish_constructor_body (void);
105 static void begin_destructor_body (void);
106 static void finish_destructor_body (void);
107 static void record_key_method_defined (tree
);
108 static tree
create_array_type_for_decl (tree
, tree
, tree
);
109 static tree
get_atexit_node (void);
110 static tree
get_dso_handle_node (void);
111 static tree
start_cleanup_fn (void);
112 static void end_cleanup_fn (void);
113 static tree
cp_make_fname_decl (location_t
, tree
, int);
114 static void initialize_predefined_identifiers (void);
115 static tree check_special_function_return_type
116 (special_function_kind
, tree
, tree
, int, const location_t
*);
117 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
118 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
119 static void store_parm_decls (tree
);
120 static void initialize_local_var (tree
, tree
);
121 static void expand_static_init (tree
, tree
);
123 /* The following symbols are subsumed in the cp_global_trees array, and
124 listed here individually for documentation purposes.
127 tree wchar_decl_node;
129 tree vtable_entry_type;
130 tree delta_type_node;
131 tree __t_desc_type_node;
133 tree class_type_node;
134 tree unknown_type_node;
136 Array type `vtable_entry_type[]'
139 tree vtbl_ptr_type_node;
146 A FUNCTION_DECL which can call `abort'. Not necessarily the
147 one that the user will declare, but sufficient to be called
148 by routines that want to abort the program.
153 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
154 tree tinfo_var_id; */
156 tree cp_global_trees
[CPTI_MAX
];
158 /* Indicates that there is a type value in some namespace, although
159 that is not necessarily in scope at the moment. */
161 tree global_type_node
;
163 /* The node that holds the "name" of the global scope. */
164 tree global_scope_name
;
166 #define local_names cp_function_chain->x_local_names
168 /* A list of objects which have constructors or destructors
169 which reside in the global scope. The decl is stored in
170 the TREE_VALUE slot and the initializer is stored
171 in the TREE_PURPOSE slot. */
172 tree static_aggregates
;
174 /* Like static_aggregates, but for thread_local variables. */
179 /* A node for the integer constant 2. */
181 tree integer_two_node
;
183 /* Used only for jumps to as-yet undefined labels, since jumps to
184 defined labels can have their validity checked immediately. */
186 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
187 struct named_label_use_entry
*next
;
188 /* The binding level to which this entry is *currently* attached.
189 This is initially the binding level in which the goto appeared,
190 but is modified as scopes are closed. */
191 cp_binding_level
*binding_level
;
192 /* The head of the names list that was current when the goto appeared,
193 or the inner scope popped. These are the decls that will *not* be
194 skipped when jumping to the label. */
196 /* The location of the goto, for error reporting. */
197 location_t o_goto_locus
;
198 /* True if an OpenMP structured block scope has been closed since
199 the goto appeared. This means that the branch from the label will
200 illegally exit an OpenMP scope. */
204 /* A list of all LABEL_DECLs in the function that have names. Here so
205 we can clear out their names' definitions at the end of the
206 function, and so we can check the validity of jumps to these labels. */
208 struct GTY((for_user
)) named_label_entry
{
209 /* The decl itself. */
212 /* The binding level to which the label is *currently* attached.
213 This is initially set to the binding level in which the label
214 is defined, but is modified as scopes are closed. */
215 cp_binding_level
*binding_level
;
216 /* The head of the names list that was current when the label was
217 defined, or the inner scope popped. These are the decls that will
218 be skipped when jumping to the label. */
220 /* A vector of all decls from all binding levels that would be
221 crossed by a backward branch to the label. */
222 vec
<tree
, va_gc
> *bad_decls
;
224 /* A list of uses of the label, before the label is defined. */
225 struct named_label_use_entry
*uses
;
227 /* The following bits are set after the label is defined, and are
228 updated as scopes are popped. They indicate that a backward jump
229 to the label will illegally enter a scope of the given flavor. */
233 bool in_transaction_scope
;
236 #define named_labels cp_function_chain->x_named_labels
238 /* The number of function bodies which we are currently processing.
239 (Zero if we are at namespace scope, one inside the body of a
240 function, two inside the body of a function in a local class, etc.) */
243 /* To avoid unwanted recursion, finish_function defers all mark_used calls
244 encountered during its execution until it finishes. */
245 bool defer_mark_used_calls
;
246 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
248 /* States indicating how grokdeclarator() should handle declspecs marked
249 with __attribute__((deprecated)). An object declared as
250 __attribute__((deprecated)) suppresses warnings of uses of other
252 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
255 /* A list of VAR_DECLs whose type was incomplete at the time the
256 variable was declared. */
258 struct GTY(()) incomplete_var
{
260 tree incomplete_type
;
264 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
266 /* Returns the kind of template specialization we are currently
267 processing, given that it's declaration contained N_CLASS_SCOPES
268 explicit scope qualifications. */
271 current_tmpl_spec_kind (int n_class_scopes
)
273 int n_template_parm_scopes
= 0;
274 int seen_specialization_p
= 0;
275 int innermost_specialization_p
= 0;
278 /* Scan through the template parameter scopes. */
279 for (b
= current_binding_level
;
280 b
->kind
== sk_template_parms
;
283 /* If we see a specialization scope inside a parameter scope,
284 then something is wrong. That corresponds to a declaration
287 template <class T> template <> ...
289 which is always invalid since [temp.expl.spec] forbids the
290 specialization of a class member template if the enclosing
291 class templates are not explicitly specialized as well. */
292 if (b
->explicit_spec_p
)
294 if (n_template_parm_scopes
== 0)
295 innermost_specialization_p
= 1;
297 seen_specialization_p
= 1;
299 else if (seen_specialization_p
== 1)
300 return tsk_invalid_member_spec
;
302 ++n_template_parm_scopes
;
305 /* Handle explicit instantiations. */
306 if (processing_explicit_instantiation
)
308 if (n_template_parm_scopes
!= 0)
309 /* We've seen a template parameter list during an explicit
310 instantiation. For example:
312 template <class T> template void f(int);
314 This is erroneous. */
315 return tsk_invalid_expl_inst
;
317 return tsk_expl_inst
;
320 if (n_template_parm_scopes
< n_class_scopes
)
321 /* We've not seen enough template headers to match all the
322 specialized classes present. For example:
324 template <class T> void R<T>::S<T>::f(int);
326 This is invalid; there needs to be one set of template
327 parameters for each class. */
328 return tsk_insufficient_parms
;
329 else if (n_template_parm_scopes
== n_class_scopes
)
330 /* We're processing a non-template declaration (even though it may
331 be a member of a template class.) For example:
333 template <class T> void S<T>::f(int);
335 The `class T' matches the `S<T>', leaving no template headers
336 corresponding to the `f'. */
338 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
339 /* We've got too many template headers. For example:
341 template <> template <class T> void f (T);
343 There need to be more enclosing classes. */
344 return tsk_excessive_parms
;
346 /* This must be a template. It's of the form:
348 template <class T> template <class U> void S<T>::f(U);
350 This is a specialization if the innermost level was a
351 specialization; otherwise it's just a definition of the
353 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
356 /* Exit the current scope. */
364 /* When a label goes out of scope, check to see if that label was used
365 in a valid manner, and issue any appropriate warnings or errors. */
368 pop_label (tree label
, tree old_value
)
370 if (!processing_template_decl
)
372 if (DECL_INITIAL (label
) == NULL_TREE
)
376 error ("label %q+D used but not defined", label
);
377 location
= input_location
;
378 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
379 /* Avoid crashing later. */
380 define_label (location
, DECL_NAME (label
));
383 warn_for_unused_label (label
);
386 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
389 /* At the end of a function, all labels declared within the function
390 go out of scope. BLOCK is the top-level block for the
394 pop_labels_1 (named_label_entry
**slot
, tree block
)
396 struct named_label_entry
*ent
= *slot
;
398 pop_label (ent
->label_decl
, NULL_TREE
);
400 /* Put the labels into the "variables" of the top-level block,
401 so debugger can see them. */
402 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
403 BLOCK_VARS (block
) = ent
->label_decl
;
405 named_labels
->clear_slot (slot
);
411 pop_labels (tree block
)
415 named_labels
->traverse
<tree
, pop_labels_1
> (block
);
420 /* At the end of a block with local labels, restore the outer definition. */
423 pop_local_label (tree label
, tree old_value
)
425 struct named_label_entry dummy
;
427 pop_label (label
, old_value
);
429 dummy
.label_decl
= label
;
430 named_label_entry
**slot
= named_labels
->find_slot (&dummy
, NO_INSERT
);
431 named_labels
->clear_slot (slot
);
434 /* The following two routines are used to interface to Objective-C++.
435 The binding level is purposely treated as an opaque type. */
438 objc_get_current_scope (void)
440 return current_binding_level
;
443 /* The following routine is used by the NeXT-style SJLJ exceptions;
444 variables get marked 'volatile' so as to not be clobbered by
445 _setjmp()/_longjmp() calls. All variables in the current scope,
446 as well as parent scopes up to (but not including) ENCLOSING_BLK
447 shall be thusly marked. */
450 objc_mark_locals_volatile (void *enclosing_blk
)
452 cp_binding_level
*scope
;
454 for (scope
= current_binding_level
;
455 scope
&& scope
!= enclosing_blk
;
456 scope
= scope
->level_chain
)
460 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
461 objc_volatilize_decl (decl
);
463 /* Do not climb up past the current function. */
464 if (scope
->kind
== sk_function_parms
)
469 /* Update data for defined and undefined labels when leaving a scope. */
472 poplevel_named_label_1 (named_label_entry
**slot
, cp_binding_level
*bl
)
474 named_label_entry
*ent
= *slot
;
475 cp_binding_level
*obl
= bl
->level_chain
;
477 if (ent
->binding_level
== bl
)
481 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
482 TREE_LISTs representing OVERLOADs, so be careful. */
483 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
485 : TREE_CHAIN (decl
)))
486 if (decl_jump_unsafe (decl
))
487 vec_safe_push (ent
->bad_decls
, decl
);
489 ent
->binding_level
= obl
;
490 ent
->names_in_scope
= obl
->names
;
494 ent
->in_try_scope
= true;
497 ent
->in_catch_scope
= true;
500 ent
->in_omp_scope
= true;
503 ent
->in_transaction_scope
= true;
511 struct named_label_use_entry
*use
;
513 for (use
= ent
->uses
; use
; use
= use
->next
)
514 if (use
->binding_level
== bl
)
516 use
->binding_level
= obl
;
517 use
->names_in_scope
= obl
->names
;
518 if (bl
->kind
== sk_omp
)
519 use
->in_omp_scope
= true;
526 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
527 when errors were reported, except for -Werror-unused-but-set-*. */
528 static int unused_but_set_errorcount
;
530 /* Exit a binding level.
531 Pop the level off, and restore the state of the identifier-decl mappings
532 that were in effect when this level was entered.
534 If KEEP == 1, this level had explicit declarations, so
535 and create a "block" (a BLOCK node) for the level
536 to record its declarations and subblocks for symbol table output.
538 If FUNCTIONBODY is nonzero, this level is the body of a function,
539 so create a block as if KEEP were set and also clear out all
542 If REVERSE is nonzero, reverse the order of decls before putting
543 them into the BLOCK. */
546 poplevel (int keep
, int reverse
, int functionbody
)
549 /* The chain of decls was accumulated in reverse order.
550 Put it into forward order, just for cleanliness. */
555 int leaving_for_scope
;
558 cp_label_binding
*label_bind
;
560 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
565 gcc_assert (current_binding_level
->kind
!= sk_class
);
567 if (current_binding_level
->kind
== sk_cleanup
)
569 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
571 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
573 /* We used to use KEEP == 2 to indicate that the new block should go
574 at the beginning of the list of blocks at this binding level,
575 rather than the end. This hack is no longer used. */
576 gcc_assert (keep
== 0 || keep
== 1);
578 if (current_binding_level
->keep
)
581 /* Any uses of undefined labels, and any defined labels, now operate
582 under constraints of next binding contour. */
583 if (cfun
&& !functionbody
&& named_labels
)
584 named_labels
->traverse
<cp_binding_level
*, poplevel_named_label_1
>
585 (current_binding_level
);
587 /* Get the decls in the order they were written.
588 Usually current_binding_level->names is in reverse order.
589 But parameter decls were previously put in forward order. */
592 current_binding_level
->names
593 = decls
= nreverse (current_binding_level
->names
);
595 decls
= current_binding_level
->names
;
597 /* If there were any declarations or structure tags in that level,
598 or if this level is a function body,
599 create a BLOCK to record them for the life of this function. */
601 /* Avoid function body block if possible. */
602 if (functionbody
&& subblocks
&& BLOCK_CHAIN (subblocks
) == NULL_TREE
)
604 else if (keep
== 1 || functionbody
)
605 block
= make_node (BLOCK
);
606 if (block
!= NULL_TREE
)
608 BLOCK_VARS (block
) = decls
;
609 BLOCK_SUBBLOCKS (block
) = subblocks
;
612 /* In each subblock, record that this is its superior. */
614 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
615 BLOCK_SUPERCONTEXT (link
) = block
;
617 /* We still support the old for-scope rules, whereby the variables
618 in a for-init statement were in scope after the for-statement
619 ended. We only use the new rules if flag_new_for_scope is
622 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
624 /* Before we remove the declarations first check for unused variables. */
625 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
626 && current_binding_level
->kind
!= sk_template_parms
627 && !processing_template_decl
)
628 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
630 /* There are cases where D itself is a TREE_LIST. See in
631 push_local_binding where the list of decls returned by
632 getdecls is built. */
633 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
634 tree type
= TREE_TYPE (decl
);
636 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
637 && ! DECL_IN_SYSTEM_HEADER (decl
)
638 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
639 && type
!= error_mark_node
640 && (!CLASS_TYPE_P (type
)
641 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
642 || lookup_attribute ("warn_unused",
643 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
645 if (! TREE_USED (decl
))
646 warning_at (DECL_SOURCE_LOCATION (decl
),
647 OPT_Wunused_variable
, "unused variable %qD", decl
);
648 else if (DECL_CONTEXT (decl
) == current_function_decl
649 // For -Wunused-but-set-variable leave references alone.
650 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
651 && errorcount
== unused_but_set_errorcount
)
653 warning_at (DECL_SOURCE_LOCATION (decl
),
654 OPT_Wunused_but_set_variable
,
655 "variable %qD set but not used", decl
);
656 unused_but_set_errorcount
= errorcount
;
661 /* Remove declarations for all the DECLs in this level. */
662 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
664 if (leaving_for_scope
&& VAR_P (link
)
665 /* It's hard to make this ARM compatibility hack play nicely with
666 lambdas, and it really isn't necessary in C++11 mode. */
667 && cxx_dialect
< cxx11
670 tree name
= DECL_NAME (link
);
674 ob
= outer_binding (name
,
675 IDENTIFIER_BINDING (name
),
678 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
680 ns_binding
= NULL_TREE
;
682 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
683 /* We have something like:
688 and we are leaving the `for' scope. There's no reason to
689 keep the binding of the inner `i' in this case. */
690 pop_binding (name
, link
);
691 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
692 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
693 /* Here, we have something like:
701 We must pop the for-scope binding so we know what's a
702 type and what isn't. */
703 pop_binding (name
, link
);
706 /* Mark this VAR_DECL as dead so that we can tell we left it
707 there only for backward compatibility. */
708 DECL_DEAD_FOR_LOCAL (link
) = 1;
710 /* Keep track of what should have happened when we
711 popped the binding. */
714 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
715 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
718 /* Add it to the list of dead variables in the next
719 outermost binding to that we can remove these when we
720 leave that binding. */
722 current_binding_level
->level_chain
->dead_vars_from_for
,
725 /* Although we don't pop the cxx_binding, we do clear
726 its SCOPE since the scope is going away now. */
727 IDENTIFIER_BINDING (name
)->scope
728 = current_binding_level
->level_chain
;
735 /* Remove the binding. */
738 if (TREE_CODE (decl
) == TREE_LIST
)
739 decl
= TREE_VALUE (decl
);
742 if (TREE_CODE (name
) == OVERLOAD
)
743 name
= OVL_FUNCTION (name
);
745 gcc_assert (DECL_P (name
));
746 pop_binding (DECL_NAME (name
), decl
);
750 /* Remove declarations for any `for' variables from inner scopes
751 that we kept around. */
752 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
754 pop_binding (DECL_NAME (decl
), decl
);
756 /* Restore the IDENTIFIER_TYPE_VALUEs. */
757 for (link
= current_binding_level
->type_shadowed
;
758 link
; link
= TREE_CHAIN (link
))
759 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
761 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
762 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
764 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
766 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
767 list if a `using' declaration put them there. The debugging
768 back ends won't understand OVERLOAD, so we remove them here.
769 Because the BLOCK_VARS are (temporarily) shared with
770 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
771 popped all the bindings. */
776 for (d
= &BLOCK_VARS (block
); *d
; )
778 if (TREE_CODE (*d
) == TREE_LIST
)
779 *d
= TREE_CHAIN (*d
);
781 d
= &DECL_CHAIN (*d
);
785 /* If the level being exited is the top level of a function,
786 check over all the labels. */
791 /* Since this is the top level block of a function, the vars are
792 the function's parameters. Don't leave them in the BLOCK
793 because they are found in the FUNCTION_DECL instead. */
794 BLOCK_VARS (block
) = 0;
798 pop_labels (subblocks
);
801 kind
= current_binding_level
->kind
;
802 if (kind
== sk_cleanup
)
806 /* If this is a temporary binding created for a cleanup, then we'll
807 have pushed a statement list level. Pop that, create a new
808 BIND_EXPR for the block, and insert it into the stream. */
809 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
810 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
817 /* The current function is being defined, so its DECL_INITIAL
818 should be error_mark_node. */
819 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
820 DECL_INITIAL (current_function_decl
) = block
? block
: subblocks
;
823 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
825 if (BLOCK_SUBBLOCKS (subblocks
))
826 BLOCK_OUTER_CURLY_BRACE_P (BLOCK_SUBBLOCKS (subblocks
)) = 1;
829 BLOCK_OUTER_CURLY_BRACE_P (subblocks
) = 1;
833 current_binding_level
->blocks
834 = block_chainon (current_binding_level
->blocks
, block
);
836 /* If we did not make a block for the level just exited,
837 any blocks made for inner levels
838 (since they cannot be recorded as subblocks in that level)
839 must be carried forward so they will later become subblocks
840 of something else. */
842 current_binding_level
->blocks
843 = block_chainon (current_binding_level
->blocks
, subblocks
);
845 /* Each and every BLOCK node created here in `poplevel' is important
846 (e.g. for proper debugging information) so if we created one
847 earlier, mark it as "used". */
849 TREE_USED (block
) = 1;
851 /* All temporary bindings created for cleanups are popped silently. */
852 if (kind
== sk_cleanup
)
855 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
859 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
860 itself, calling F for each. The DATA is passed to F as well. */
863 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
866 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
868 result
|= (*f
) (name_space
, data
);
870 for (; current
; current
= DECL_CHAIN (current
))
871 result
|= walk_namespaces_r (current
, f
, data
);
876 /* Walk all the namespaces, calling F for each. The DATA is passed to
880 walk_namespaces (walk_namespaces_fn f
, void* data
)
882 return walk_namespaces_r (global_namespace
, f
, data
);
885 /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
888 wrapup_globals_for_namespace (tree name_space
, void* data ATTRIBUTE_UNUSED
)
890 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
891 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
892 tree
*vec
= statics
->address ();
893 int len
= statics
->length ();
895 /* Write out any globals that need to be output. */
896 return wrapup_global_declarations (vec
, len
);
899 /* In C++, you don't have to write `struct S' to refer to `S'; you
900 can just use `S'. We accomplish this by creating a TYPE_DECL as
901 if the user had written `typedef struct S S'. Create and return
902 the TYPE_DECL for TYPE. */
905 create_implicit_typedef (tree name
, tree type
)
909 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
910 DECL_ARTIFICIAL (decl
) = 1;
911 /* There are other implicit type declarations, like the one *within*
912 a class that allows you to write `S::S'. We must distinguish
914 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
915 TYPE_NAME (type
) = decl
;
916 TYPE_STUB_DECL (type
) = decl
;
921 /* Remember a local name for name-mangling purposes. */
924 push_local_name (tree decl
)
929 timevar_start (TV_NAME_LOOKUP
);
931 name
= DECL_NAME (decl
);
933 nelts
= vec_safe_length (local_names
);
934 for (i
= 0; i
< nelts
; i
++)
936 t
= (*local_names
)[i
];
937 if (DECL_NAME (t
) == name
)
939 if (!DECL_LANG_SPECIFIC (decl
))
940 retrofit_lang_decl (decl
);
941 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
942 if (DECL_DISCRIMINATOR_SET_P (t
))
943 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
945 DECL_DISCRIMINATOR (decl
) = 1;
947 (*local_names
)[i
] = decl
;
948 timevar_stop (TV_NAME_LOOKUP
);
953 vec_safe_push (local_names
, decl
);
954 timevar_stop (TV_NAME_LOOKUP
);
957 /* Subroutine of duplicate_decls: return truthvalue of whether
958 or not types of these decls match.
960 For C++, we must compare the parameter list so that `int' can match
961 `int&' in a parameter position, but `int&' is not confused with
965 decls_match (tree newdecl
, tree olddecl
)
969 if (newdecl
== olddecl
)
972 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
973 /* If the two DECLs are not even the same kind of thing, we're not
974 interested in their types. */
977 gcc_assert (DECL_P (newdecl
));
979 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
981 tree f1
= TREE_TYPE (newdecl
);
982 tree f2
= TREE_TYPE (olddecl
);
983 tree p1
= TYPE_ARG_TYPES (f1
);
984 tree p2
= TYPE_ARG_TYPES (f2
);
987 /* Specializations of different templates are different functions
988 even if they have the same type. */
989 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
990 ? DECL_TI_TEMPLATE (newdecl
)
992 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
993 ? DECL_TI_TEMPLATE (olddecl
)
998 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
999 && ! (DECL_EXTERN_C_P (newdecl
)
1000 && DECL_EXTERN_C_P (olddecl
)))
1003 /* A new declaration doesn't match a built-in one unless it
1004 is also extern "C". */
1005 if (DECL_IS_BUILTIN (olddecl
)
1006 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1009 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1012 /* A declaration with deduced return type should use its pre-deduction
1013 type for declaration matching. */
1014 r2
= fndecl_declared_return_type (olddecl
);
1016 if (same_type_p (TREE_TYPE (f1
), r2
))
1018 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1019 && (DECL_BUILT_IN (olddecl
)
1020 #ifndef NO_IMPLICIT_EXTERN_C
1021 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1022 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1026 types_match
= self_promoting_args_p (p1
);
1027 if (p1
== void_list_node
)
1028 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1030 #ifndef NO_IMPLICIT_EXTERN_C
1031 else if (!prototype_p (f1
)
1032 && (DECL_EXTERN_C_P (olddecl
)
1033 && DECL_IN_SYSTEM_HEADER (olddecl
)
1034 && !DECL_CLASS_SCOPE_P (olddecl
))
1035 && (DECL_EXTERN_C_P (newdecl
)
1036 && DECL_IN_SYSTEM_HEADER (newdecl
)
1037 && !DECL_CLASS_SCOPE_P (newdecl
)))
1039 types_match
= self_promoting_args_p (p2
);
1040 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1046 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1047 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1048 || comp_type_attributes (TREE_TYPE (newdecl
),
1049 TREE_TYPE (olddecl
)) != 0);
1054 /* The decls dont match if they correspond to two different versions
1055 of the same function. Disallow extern "C" functions to be
1056 versions for now. */
1058 && !DECL_EXTERN_C_P (newdecl
)
1059 && !DECL_EXTERN_C_P (olddecl
)
1060 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1062 /* Mark functions as versions if necessary. Modify the mangled decl
1063 name if necessary. */
1064 if (DECL_FUNCTION_VERSIONED (newdecl
)
1065 && DECL_FUNCTION_VERSIONED (olddecl
))
1067 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1069 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1070 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1071 mangle_decl (newdecl
);
1073 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1075 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1076 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1077 mangle_decl (olddecl
);
1079 cgraph_node::record_function_versions (olddecl
, newdecl
);
1083 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1085 tree oldres
= DECL_TEMPLATE_RESULT (olddecl
);
1086 tree newres
= DECL_TEMPLATE_RESULT (newdecl
);
1088 if (TREE_CODE (newres
) != TREE_CODE (oldres
))
1091 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1092 DECL_TEMPLATE_PARMS (olddecl
)))
1095 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1096 types_match
= (same_type_p (TREE_TYPE (oldres
), TREE_TYPE (newres
))
1097 && equivalently_constrained (olddecl
, newdecl
));
1099 // We don't need to check equivalently_constrained for variable and
1100 // function templates because we check it on the results.
1101 types_match
= decls_match (oldres
, newres
);
1105 /* Need to check scope for variable declaration (VAR_DECL).
1106 For typedef (TYPE_DECL), scope is ignored. */
1108 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1110 Two declarations for an object with C language linkage
1111 with the same name (ignoring the namespace that qualify
1112 it) that appear in different namespace scopes refer to
1114 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1117 if (TREE_TYPE (newdecl
) == error_mark_node
)
1118 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1119 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1120 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1121 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1124 types_match
= comptypes (TREE_TYPE (newdecl
),
1125 TREE_TYPE (olddecl
),
1126 COMPARE_REDECLARATION
);
1129 // Normal functions can be constrained, as can variable partial
1131 if (types_match
&& VAR_OR_FUNCTION_DECL_P (newdecl
))
1132 types_match
= equivalently_constrained (newdecl
, olddecl
);
1137 /* If NEWDECL is `static' and an `extern' was seen previously,
1138 warn about it. OLDDECL is the previous declaration.
1140 Note that this does not apply to the C++ case of declaring
1141 a variable `extern const' and then later `const'.
1143 Don't complain about built-in functions, since they are beyond
1144 the user's control. */
1147 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1149 if (TREE_CODE (newdecl
) == TYPE_DECL
1150 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1151 || TREE_CODE (newdecl
) == CONST_DECL
1152 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1155 /* Don't get confused by static member functions; that's a different
1157 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1158 && DECL_STATIC_FUNCTION_P (newdecl
))
1161 /* If the old declaration was `static', or the new one isn't, then
1162 everything is OK. */
1163 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1166 /* It's OK to declare a builtin function as `static'. */
1167 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1168 && DECL_ARTIFICIAL (olddecl
))
1171 if (permerror (DECL_SOURCE_LOCATION (newdecl
),
1172 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1173 inform (DECL_SOURCE_LOCATION (olddecl
),
1174 "previous declaration of %qD", olddecl
);
1177 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1178 function templates. If their exception specifications do not
1179 match, issue a diagnostic. */
1182 check_redeclaration_exception_specification (tree new_decl
,
1185 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1186 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1188 /* Two default specs are equivalent, don't force evaluation. */
1189 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1190 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1193 maybe_instantiate_noexcept (new_decl
);
1194 maybe_instantiate_noexcept (old_decl
);
1195 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1196 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1200 If any declaration of a function has an exception-specification,
1201 all declarations, including the definition and an explicit
1202 specialization, of that function shall have an
1203 exception-specification with the same set of type-ids. */
1204 if (! DECL_IS_BUILTIN (old_decl
)
1206 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1209 = "declaration of %q+F has a different exception specifier";
1210 bool complained
= true;
1211 if (! DECL_IN_SYSTEM_HEADER (old_decl
))
1212 error (msg
, new_decl
);
1214 complained
= pedwarn (0, OPT_Wsystem_headers
, msg
, new_decl
);
1216 inform (0, "from previous declaration %q+F", old_decl
);
1220 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1221 Otherwise issue diagnostics. */
1224 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1226 old_decl
= STRIP_TEMPLATE (old_decl
);
1227 new_decl
= STRIP_TEMPLATE (new_decl
);
1228 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1229 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1231 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1232 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1234 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1236 if (DECL_BUILT_IN (old_decl
))
1238 /* Hide a built-in declaration. */
1239 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1240 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1243 /* 7.1.5 [dcl.constexpr]
1244 Note: An explicit specialization can differ from the template
1245 declaration with respect to the constexpr specifier. */
1246 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1247 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1250 error ("redeclaration %q+D differs in %<constexpr%>", new_decl
);
1251 error ("from previous declaration %q+D", old_decl
);
1257 // If OLDDECL and NEWDECL are concept declarations with the same type
1258 // (i.e., and template parameters), but different requirements,
1259 // emit diagnostics and return true. Otherwise, return false.
1261 check_concept_refinement (tree olddecl
, tree newdecl
)
1263 if (!DECL_DECLARED_CONCEPT_P (olddecl
) || !DECL_DECLARED_CONCEPT_P (newdecl
))
1266 tree d1
= DECL_TEMPLATE_RESULT (olddecl
);
1267 tree d2
= DECL_TEMPLATE_RESULT (newdecl
);
1268 if (TREE_CODE (d1
) != TREE_CODE (d2
))
1271 tree t1
= TREE_TYPE (d1
);
1272 tree t2
= TREE_TYPE (d2
);
1273 if (TREE_CODE (d1
) == FUNCTION_DECL
)
1275 if (compparms (TYPE_ARG_TYPES (t1
), TYPE_ARG_TYPES (t2
))
1276 && comp_template_parms (DECL_TEMPLATE_PARMS (olddecl
),
1277 DECL_TEMPLATE_PARMS (newdecl
))
1278 && !equivalently_constrained (olddecl
, newdecl
))
1280 error ("cannot specialize concept %q#D", olddecl
);
1287 /* DECL is a redeclaration of a function or function template. If
1288 it does have default arguments issue a diagnostic. Note: this
1289 function is used to enforce the requirements in C++11 8.3.6 about
1290 no default arguments in redeclarations. */
1293 check_redeclaration_no_default_args (tree decl
)
1295 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1297 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1298 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1299 if (TREE_PURPOSE (t
))
1301 permerror (DECL_SOURCE_LOCATION (decl
),
1302 "redeclaration of %q#D may not have default "
1308 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1309 && lookup_attribute ("gnu_inline", \
1310 DECL_ATTRIBUTES (fn)))
1312 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1313 If the redeclaration is invalid, a diagnostic is issued, and the
1314 error_mark_node is returned. Otherwise, OLDDECL is returned.
1316 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1319 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1322 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1324 unsigned olddecl_uid
= DECL_UID (olddecl
);
1325 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1326 int new_defines_function
= 0;
1327 tree new_template_info
;
1329 if (newdecl
== olddecl
)
1332 types_match
= decls_match (newdecl
, olddecl
);
1334 /* If either the type of the new decl or the type of the old decl is an
1335 error_mark_node, then that implies that we have already issued an
1336 error (earlier) for some bogus type specification, and in that case,
1337 it is rather pointless to harass the user with yet more error message
1338 about the same declaration, so just pretend the types match here. */
1339 if (TREE_TYPE (newdecl
) == error_mark_node
1340 || TREE_TYPE (olddecl
) == error_mark_node
)
1341 return error_mark_node
;
1343 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1344 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1346 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1347 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1348 && check_raw_literal_operator (olddecl
))
1349 error ("literal operator template %q+D conflicts with"
1350 " raw literal operator %qD", newdecl
, olddecl
);
1351 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1352 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1353 && check_raw_literal_operator (newdecl
))
1354 error ("raw literal operator %q+D conflicts with"
1355 " literal operator template %qD", newdecl
, olddecl
);
1358 if (DECL_P (olddecl
)
1359 && TREE_CODE (newdecl
) == FUNCTION_DECL
1360 && TREE_CODE (olddecl
) == FUNCTION_DECL
1361 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1363 if (DECL_DECLARED_INLINE_P (newdecl
)
1364 && DECL_UNINLINABLE (newdecl
)
1365 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1366 /* Already warned elsewhere. */;
1367 else if (DECL_DECLARED_INLINE_P (olddecl
)
1368 && DECL_UNINLINABLE (olddecl
)
1369 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1370 /* Already warned. */;
1371 else if (DECL_DECLARED_INLINE_P (newdecl
)
1372 && DECL_UNINLINABLE (olddecl
)
1373 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1375 if (warning_at (DECL_SOURCE_LOCATION (newdecl
),
1376 OPT_Wattributes
, "function %qD redeclared as inline",
1378 inform (DECL_SOURCE_LOCATION (olddecl
),
1379 "previous declaration of %qD with attribute noinline",
1382 else if (DECL_DECLARED_INLINE_P (olddecl
)
1383 && DECL_UNINLINABLE (newdecl
)
1384 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1386 if (warning_at (DECL_SOURCE_LOCATION (newdecl
),
1387 OPT_Wattributes
, "function %qD redeclared with "
1388 "attribute noinline", newdecl
))
1389 inform (DECL_SOURCE_LOCATION (olddecl
),
1390 "previous declaration of %qD was inline",
1395 /* Check for redeclaration and other discrepancies. */
1396 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1397 && DECL_ARTIFICIAL (olddecl
))
1399 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1400 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1402 /* Avoid warnings redeclaring built-ins which have not been
1403 explicitly declared. */
1404 if (DECL_ANTICIPATED (olddecl
))
1407 /* If you declare a built-in or predefined function name as static,
1408 the old definition is overridden, but optionally warn this was a
1409 bad choice of name. */
1410 if (! TREE_PUBLIC (newdecl
))
1412 warning (OPT_Wshadow
,
1413 DECL_BUILT_IN (olddecl
)
1414 ? G_("shadowing built-in function %q#D")
1415 : G_("shadowing library function %q#D"), olddecl
);
1416 /* Discard the old built-in function. */
1419 /* If the built-in is not ansi, then programs can override
1420 it even globally without an error. */
1421 else if (! DECL_BUILT_IN (olddecl
))
1422 warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1423 "library function %q#D redeclared as non-function %q#D",
1426 error ("declaration of %q+#D conflicts with built-in "
1427 "declaration %q#D", newdecl
, olddecl
);
1430 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1432 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1433 error_at (DECL_SOURCE_LOCATION (newdecl
),
1434 "redeclaration of %<pragma omp declare reduction%>");
1435 inform (DECL_SOURCE_LOCATION (olddecl
),
1436 "previous %<pragma omp declare reduction%> declaration");
1437 return error_mark_node
;
1439 else if (!types_match
)
1441 /* Avoid warnings redeclaring built-ins which have not been
1442 explicitly declared. */
1443 if (DECL_ANTICIPATED (olddecl
))
1445 /* Deal with fileptr_type_node. FILE type is not known
1446 at the time we create the builtins. */
1449 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1450 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1452 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1455 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1457 tree t
= TREE_VALUE (t1
);
1460 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1461 == get_identifier ("FILE")
1462 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1464 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1466 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1467 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1468 types_match
= decls_match (newdecl
, olddecl
);
1470 return duplicate_decls (newdecl
, olddecl
,
1472 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1475 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1478 else if ((DECL_EXTERN_C_P (newdecl
)
1479 && DECL_EXTERN_C_P (olddecl
))
1480 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1481 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1483 /* A near match; override the builtin. */
1485 if (TREE_PUBLIC (newdecl
))
1486 warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1487 "new declaration %q#D ambiguates built-in "
1488 "declaration %q#D", newdecl
, olddecl
);
1490 warning (OPT_Wshadow
,
1491 DECL_BUILT_IN (olddecl
)
1492 ? G_("shadowing built-in function %q#D")
1493 : G_("shadowing library function %q#D"), olddecl
);
1496 /* Discard the old built-in function. */
1499 /* Replace the old RTL to avoid problems with inlining. */
1500 COPY_DECL_RTL (newdecl
, olddecl
);
1502 /* Even if the types match, prefer the new declarations type for
1503 built-ins which have not been explicitly declared, for
1504 exception lists, etc... */
1505 else if (DECL_IS_BUILTIN (olddecl
))
1507 tree type
= TREE_TYPE (newdecl
);
1508 tree attribs
= (*targetm
.merge_type_attributes
)
1509 (TREE_TYPE (olddecl
), type
);
1511 type
= cp_build_type_attribute_variant (type
, attribs
);
1512 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1515 /* If a function is explicitly declared "throw ()", propagate that to
1516 the corresponding builtin. */
1517 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1518 && DECL_ANTICIPATED (olddecl
)
1519 && TREE_NOTHROW (newdecl
)
1520 && !TREE_NOTHROW (olddecl
))
1522 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1523 tree tmpdecl
= builtin_decl_explicit (fncode
);
1524 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1525 TREE_NOTHROW (tmpdecl
) = 1;
1528 /* Whether or not the builtin can throw exceptions has no
1529 bearing on this declarator. */
1530 TREE_NOTHROW (olddecl
) = 0;
1532 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1534 /* If a builtin function is redeclared as `static', merge
1535 the declarations, but make the original one static. */
1536 DECL_THIS_STATIC (olddecl
) = 1;
1537 TREE_PUBLIC (olddecl
) = 0;
1539 /* Make the old declaration consistent with the new one so
1540 that all remnants of the builtin-ness of this function
1541 will be banished. */
1542 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1543 COPY_DECL_RTL (newdecl
, olddecl
);
1546 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1548 /* C++ Standard, 3.3, clause 4:
1549 "[Note: a namespace name or a class template name must be unique
1550 in its declarative region (7.3.2, clause 14). ]" */
1551 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1552 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1553 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1554 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1555 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1556 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1558 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1559 && TREE_CODE (newdecl
) != TYPE_DECL
)
1560 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1561 && TREE_CODE (olddecl
) != TYPE_DECL
))
1563 /* We do nothing special here, because C++ does such nasty
1564 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1565 get shadowed, and know that if we need to find a TYPE_DECL
1566 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1567 slot of the identifier. */
1571 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1572 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1573 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1574 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1578 error ("%q#D redeclared as different kind of symbol", newdecl
);
1579 if (TREE_CODE (olddecl
) == TREE_LIST
)
1580 olddecl
= TREE_VALUE (olddecl
);
1581 inform (DECL_SOURCE_LOCATION (olddecl
),
1582 "previous declaration %q#D", olddecl
);
1584 return error_mark_node
;
1586 else if (!types_match
)
1588 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1589 /* These are certainly not duplicate declarations; they're
1590 from different scopes. */
1593 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1595 /* The name of a class template may not be declared to refer to
1596 any other template, class, function, object, namespace, value,
1597 or type in the same scope. */
1598 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1599 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1601 error ("conflicting declaration of template %q+#D", newdecl
);
1602 inform (DECL_SOURCE_LOCATION (olddecl
),
1603 "previous declaration %q#D", olddecl
);
1604 return error_mark_node
;
1606 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1607 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1608 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1609 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1610 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1611 DECL_TEMPLATE_PARMS (olddecl
))
1612 /* Template functions can be disambiguated by
1614 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1615 TREE_TYPE (TREE_TYPE (olddecl
)))
1616 // Template functions can also be disambiguated by
1618 && equivalently_constrained (olddecl
, newdecl
))
1620 error ("ambiguating new declaration %q+#D", newdecl
);
1621 inform (DECL_SOURCE_LOCATION (olddecl
),
1622 "old declaration %q#D", olddecl
);
1624 else if (check_concept_refinement (olddecl
, newdecl
))
1625 return error_mark_node
;
1628 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1630 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1632 error ("conflicting declaration of C function %q+#D",
1634 inform (DECL_SOURCE_LOCATION (olddecl
),
1635 "previous declaration %q#D", olddecl
);
1638 /* For function versions, params and types match, but they
1639 are not ambiguous. */
1640 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1641 && !DECL_FUNCTION_VERSIONED (olddecl
))
1642 // The functions have the same parameter types.
1643 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1644 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)))
1645 // And the same constraints.
1646 && equivalently_constrained (newdecl
, olddecl
))
1648 error ("ambiguating new declaration of %q+#D", newdecl
);
1649 inform (DECL_SOURCE_LOCATION (olddecl
),
1650 "old declaration %q#D", olddecl
);
1651 return error_mark_node
;
1658 error ("conflicting declaration %q+#D", newdecl
);
1659 inform (DECL_SOURCE_LOCATION (olddecl
),
1660 "previous declaration as %q#D", olddecl
);
1661 return error_mark_node
;
1664 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1665 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1666 && (!DECL_TEMPLATE_INFO (newdecl
)
1667 || (DECL_TI_TEMPLATE (newdecl
)
1668 != DECL_TI_TEMPLATE (olddecl
))))
1669 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1670 && (!DECL_TEMPLATE_INFO (olddecl
)
1671 || (DECL_TI_TEMPLATE (olddecl
)
1672 != DECL_TI_TEMPLATE (newdecl
))))))
1673 /* It's OK to have a template specialization and a non-template
1674 with the same type, or to have specializations of two
1675 different templates with the same type. Note that if one is a
1676 specialization, and the other is an instantiation of the same
1677 template, that we do not exit at this point. That situation
1678 can occur if we instantiate a template class, and then
1679 specialize one of its methods. This situation is valid, but
1680 the declarations must be merged in the usual way. */
1682 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1683 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1684 && !DECL_USE_TEMPLATE (newdecl
))
1685 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1686 && !DECL_USE_TEMPLATE (olddecl
))))
1687 /* One of the declarations is a template instantiation, and the
1688 other is not a template at all. That's OK. */
1690 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1692 /* In [namespace.alias] we have:
1694 In a declarative region, a namespace-alias-definition can be
1695 used to redefine a namespace-alias declared in that declarative
1696 region to refer only to the namespace to which it already
1699 Therefore, if we encounter a second alias directive for the same
1700 alias, we can just ignore the second directive. */
1701 if (DECL_NAMESPACE_ALIAS (newdecl
)
1702 && (DECL_NAMESPACE_ALIAS (newdecl
)
1703 == DECL_NAMESPACE_ALIAS (olddecl
)))
1705 /* [namespace.alias]
1707 A namespace-name or namespace-alias shall not be declared as
1708 the name of any other entity in the same declarative region.
1709 A namespace-name defined at global scope shall not be
1710 declared as the name of any other entity in any global scope
1712 error ("conflicting declaration of namespace %q+D", newdecl
);
1713 inform (DECL_SOURCE_LOCATION (olddecl
),
1714 "previous declaration of namespace %qD here", olddecl
);
1715 return error_mark_node
;
1719 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1722 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1723 if (DECL_NAME (olddecl
) != NULL_TREE
)
1724 inform (DECL_SOURCE_LOCATION (olddecl
),
1725 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1726 ? G_("%q#D previously defined here")
1727 : G_("%q#D previously declared here"), olddecl
);
1728 return error_mark_node
;
1730 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1731 && DECL_INITIAL (olddecl
) != NULL_TREE
1732 && !prototype_p (TREE_TYPE (olddecl
))
1733 && prototype_p (TREE_TYPE (newdecl
)))
1735 /* Prototype decl follows defn w/o prototype. */
1736 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1737 "prototype specified for %q#D", newdecl
))
1738 inform (DECL_SOURCE_LOCATION (olddecl
),
1739 "previous non-prototype definition here");
1741 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1742 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1745 If two declarations of the same function or object
1746 specify different linkage-specifications ..., the program
1747 is ill-formed.... Except for functions with C++ linkage,
1748 a function declaration without a linkage specification
1749 shall not precede the first linkage specification for
1750 that function. A function can be declared without a
1751 linkage specification after an explicit linkage
1752 specification has been seen; the linkage explicitly
1753 specified in the earlier declaration is not affected by
1754 such a function declaration.
1756 DR 563 raises the question why the restrictions on
1757 functions should not also apply to objects. Older
1758 versions of G++ silently ignore the linkage-specification
1766 which is clearly wrong. Therefore, we now treat objects
1768 if (current_lang_depth () == 0)
1770 /* There is no explicit linkage-specification, so we use
1771 the linkage from the previous declaration. */
1772 if (!DECL_LANG_SPECIFIC (newdecl
))
1773 retrofit_lang_decl (newdecl
);
1774 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1778 error ("conflicting declaration of %q+#D with %qL linkage",
1779 newdecl
, DECL_LANGUAGE (newdecl
));
1780 inform (DECL_SOURCE_LOCATION (olddecl
),
1781 "previous declaration with %qL linkage",
1782 DECL_LANGUAGE (olddecl
));
1786 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1788 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1790 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1791 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1792 && (/* grokfndecl passes member function templates too
1793 as FUNCTION_DECLs. */
1794 DECL_TEMPLATE_INFO (olddecl
)
1796 Default arguments for a member function of a class
1797 template shall be specified on the initial declaration
1798 of the member function within the class template. */
1799 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1800 check_redeclaration_no_default_args (newdecl
);
1803 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1804 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1807 for (; t1
&& t1
!= void_list_node
;
1808 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1809 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1811 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1814 if (permerror (input_location
,
1815 "default argument given for parameter "
1816 "%d of %q#D", i
, newdecl
))
1817 inform (DECL_SOURCE_LOCATION (olddecl
),
1818 "previous specification in %q#D here",
1823 error ("default argument given for parameter %d "
1824 "of %q#D", i
, newdecl
);
1825 inform (DECL_SOURCE_LOCATION (olddecl
),
1826 "previous specification in %q#D here",
1834 /* Do not merge an implicit typedef with an explicit one. In:
1838 typedef class A A __attribute__ ((foo));
1840 the attribute should apply only to the typedef. */
1841 if (TREE_CODE (olddecl
) == TYPE_DECL
1842 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1843 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1846 /* If new decl is `static' and an `extern' was seen previously,
1848 warn_extern_redeclared_static (newdecl
, olddecl
);
1850 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1851 return error_mark_node
;
1853 /* We have committed to returning 1 at this point. */
1854 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1856 /* Now that functions must hold information normally held
1857 by field decls, there is extra work to do so that
1858 declaration information does not get destroyed during
1860 if (DECL_VINDEX (olddecl
))
1861 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1862 if (DECL_CONTEXT (olddecl
))
1863 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1864 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1865 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1866 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1867 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1868 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1869 DECL_FINAL_P (newdecl
) |= DECL_FINAL_P (olddecl
);
1870 DECL_OVERRIDE_P (newdecl
) |= DECL_OVERRIDE_P (olddecl
);
1871 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1872 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1873 SET_OVERLOADED_OPERATOR_CODE
1874 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1875 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1877 /* Optionally warn about more than one declaration for the same
1878 name, but don't warn about a function declaration followed by a
1880 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1881 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1882 /* Don't warn about extern decl followed by definition. */
1883 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1884 /* Don't warn about friends, let add_friend take care of it. */
1885 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1886 /* Don't warn about declaration followed by specialization. */
1887 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1888 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1890 if (warning_at (DECL_SOURCE_LOCATION (newdecl
),
1891 OPT_Wredundant_decls
,
1892 "redundant redeclaration of %qD in same scope",
1894 inform (DECL_SOURCE_LOCATION (olddecl
),
1895 "previous declaration of %qD", olddecl
);
1898 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1899 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1901 if (DECL_DELETED_FN (newdecl
))
1903 error ("deleted definition of %q+D", newdecl
);
1904 inform (DECL_SOURCE_LOCATION (olddecl
),
1905 "previous declaration of %qD", olddecl
);
1907 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1911 /* Deal with C++: must preserve virtual function table size. */
1912 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1914 tree newtype
= TREE_TYPE (newdecl
);
1915 tree oldtype
= TREE_TYPE (olddecl
);
1917 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1918 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1919 CLASSTYPE_FRIEND_CLASSES (newtype
)
1920 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1922 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1925 /* Copy all the DECL_... slots specified in the new decl
1926 except for any that we copy here from the old type. */
1927 DECL_ATTRIBUTES (newdecl
)
1928 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1930 if (DECL_DECLARES_FUNCTION_P (olddecl
) && DECL_DECLARES_FUNCTION_P (newdecl
))
1932 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1933 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1934 && DECL_HIDDEN_FRIEND_P (olddecl
)
1935 && newdecl_is_friend
);
1938 DECL_ANTICIPATED (olddecl
) = 0;
1939 DECL_HIDDEN_FRIEND_P (olddecl
) = 0;
1943 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1947 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1948 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1949 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1950 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1951 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1952 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1954 DECL_ATTRIBUTES (old_result
)
1955 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1957 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1959 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1960 declarations of a function template. */
1961 if (DECL_SOURCE_LOCATION (newdecl
)
1962 != DECL_SOURCE_LOCATION (olddecl
))
1963 check_redeclaration_no_default_args (newdecl
);
1965 check_default_args (newdecl
);
1967 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1968 && DECL_INITIAL (new_result
))
1970 if (DECL_INITIAL (old_result
))
1971 DECL_UNINLINABLE (old_result
) = 1;
1973 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1974 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1975 DECL_NOT_REALLY_EXTERN (old_result
)
1976 = DECL_NOT_REALLY_EXTERN (new_result
);
1977 DECL_INTERFACE_KNOWN (old_result
)
1978 = DECL_INTERFACE_KNOWN (new_result
);
1979 DECL_DECLARED_INLINE_P (old_result
)
1980 = DECL_DECLARED_INLINE_P (new_result
);
1981 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1982 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1987 DECL_DECLARED_INLINE_P (old_result
)
1988 |= DECL_DECLARED_INLINE_P (new_result
);
1989 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1990 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1991 check_redeclaration_exception_specification (newdecl
, olddecl
);
1995 /* If the new declaration is a definition, update the file and
1996 line information on the declaration, and also make
1997 the old declaration the same definition. */
1998 if (DECL_INITIAL (new_result
) != NULL_TREE
)
2000 DECL_SOURCE_LOCATION (olddecl
)
2001 = DECL_SOURCE_LOCATION (old_result
)
2002 = DECL_SOURCE_LOCATION (newdecl
);
2003 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
2004 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
2007 DECL_ARGUMENTS (old_result
)
2008 = DECL_ARGUMENTS (new_result
);
2009 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
2010 parm
= DECL_CHAIN (parm
))
2011 DECL_CONTEXT (parm
) = old_result
;
2020 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2021 check_redeclaration_exception_specification (newdecl
, olddecl
);
2023 /* Automatically handles default parameters. */
2024 tree oldtype
= TREE_TYPE (olddecl
);
2027 /* For typedefs use the old type, as the new type's DECL_NAME points
2028 at newdecl, which will be ggc_freed. */
2029 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2032 /* Merge the data types specified in the two decls. */
2033 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
2035 if (VAR_P (newdecl
))
2037 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
2038 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
2039 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
2040 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
2041 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
2042 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
2044 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2045 if (DECL_LANG_SPECIFIC (olddecl
)
2046 && CP_DECL_THREADPRIVATE_P (olddecl
))
2048 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2049 if (!DECL_LANG_SPECIFIC (newdecl
))
2050 retrofit_lang_decl (newdecl
);
2052 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
2056 /* An explicit specialization of a function template or of a member
2057 function of a class template can be declared transaction_safe
2058 independently of whether the corresponding template entity is declared
2059 transaction_safe. */
2060 if (flag_tm
&& TREE_CODE (newdecl
) == FUNCTION_DECL
2061 && DECL_TEMPLATE_INSTANTIATION (olddecl
)
2062 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)
2063 && tx_safe_fn_type_p (newtype
)
2064 && !tx_safe_fn_type_p (TREE_TYPE (newdecl
)))
2065 newtype
= tx_unsafe_fn_variant (newtype
);
2067 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
2069 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2070 check_default_args (newdecl
);
2072 /* Lay the type out, unless already done. */
2073 if (! same_type_p (newtype
, oldtype
)
2074 && TREE_TYPE (newdecl
) != error_mark_node
2075 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2076 layout_type (TREE_TYPE (newdecl
));
2078 if ((VAR_P (newdecl
)
2079 || TREE_CODE (newdecl
) == PARM_DECL
2080 || TREE_CODE (newdecl
) == RESULT_DECL
2081 || TREE_CODE (newdecl
) == FIELD_DECL
2082 || TREE_CODE (newdecl
) == TYPE_DECL
)
2083 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2084 layout_decl (newdecl
, 0);
2086 /* Merge the type qualifiers. */
2087 if (TREE_READONLY (newdecl
))
2088 TREE_READONLY (olddecl
) = 1;
2089 if (TREE_THIS_VOLATILE (newdecl
))
2090 TREE_THIS_VOLATILE (olddecl
) = 1;
2091 if (TREE_NOTHROW (newdecl
))
2092 TREE_NOTHROW (olddecl
) = 1;
2094 /* Merge deprecatedness. */
2095 if (TREE_DEPRECATED (newdecl
))
2096 TREE_DEPRECATED (olddecl
) = 1;
2098 /* Preserve function specific target and optimization options */
2099 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2101 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2102 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2103 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2104 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2106 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2107 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2108 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2109 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2112 /* Merge the initialization information. */
2113 if (DECL_INITIAL (newdecl
) == NULL_TREE
2114 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2116 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2117 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2118 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2120 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2121 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2125 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2127 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2128 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2129 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2130 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2131 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2132 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2133 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2134 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2135 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2136 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2137 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2138 /* Keep the old RTL. */
2139 COPY_DECL_RTL (olddecl
, newdecl
);
2141 else if (VAR_P (newdecl
)
2142 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2144 /* Keep the old RTL. We cannot keep the old RTL if the old
2145 declaration was for an incomplete object and the new
2146 declaration is not since many attributes of the RTL will
2148 COPY_DECL_RTL (olddecl
, newdecl
);
2151 /* If cannot merge, then use the new type and qualifiers,
2152 and don't preserve the old rtl. */
2155 /* Clean out any memory we had of the old declaration. */
2156 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2158 TREE_VALUE (oldstatic
) = error_mark_node
;
2160 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2161 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2162 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2163 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2166 /* Merge the storage class information. */
2167 merge_weak (newdecl
, olddecl
);
2169 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2170 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2171 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2172 if (! DECL_EXTERNAL (olddecl
))
2173 DECL_EXTERNAL (newdecl
) = 0;
2174 if (! DECL_COMDAT (olddecl
))
2175 DECL_COMDAT (newdecl
) = 0;
2177 new_template_info
= NULL_TREE
;
2178 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2180 bool new_redefines_gnu_inline
= false;
2182 if (new_defines_function
2183 && ((DECL_INTERFACE_KNOWN (olddecl
)
2184 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2185 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2186 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2187 == FUNCTION_DECL
))))
2191 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2192 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2194 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2197 if (!new_redefines_gnu_inline
)
2199 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2200 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2201 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2203 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2204 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2205 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2207 /* If the OLDDECL is an instantiation and/or specialization,
2208 then the NEWDECL must be too. But, it may not yet be marked
2209 as such if the caller has created NEWDECL, but has not yet
2210 figured out that it is a redeclaration. */
2211 if (!DECL_USE_TEMPLATE (newdecl
))
2212 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2214 /* Don't really know how much of the language-specific
2215 values we should copy from old to new. */
2216 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2217 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2218 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2219 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2221 if (LANG_DECL_HAS_MIN (newdecl
))
2223 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2224 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2225 if (DECL_TEMPLATE_INFO (newdecl
))
2227 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2228 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2229 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2230 /* Remember the presence of explicit specialization args. */
2231 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2232 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2234 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2236 /* Only functions have these fields. */
2237 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2239 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2240 DECL_BEFRIENDING_CLASSES (newdecl
)
2241 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2242 DECL_BEFRIENDING_CLASSES (olddecl
));
2243 /* DECL_THUNKS is only valid for virtual functions,
2244 otherwise it is a DECL_FRIEND_CONTEXT. */
2245 if (DECL_VIRTUAL_P (newdecl
))
2246 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2248 /* Only variables have this field. */
2249 else if (VAR_P (newdecl
)
2250 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2251 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2254 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2258 /* Merge parameter attributes. */
2259 tree oldarg
, newarg
;
2260 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2261 newarg
= DECL_ARGUMENTS(newdecl
);
2263 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2264 DECL_ATTRIBUTES (newarg
)
2265 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2266 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2269 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2270 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2272 /* If newdecl is not a specialization, then it is not a
2273 template-related function at all. And that means that we
2274 should have exited above, returning 0. */
2275 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2277 if (DECL_ODR_USED (olddecl
))
2278 /* From [temp.expl.spec]:
2280 If a template, a member template or the member of a class
2281 template is explicitly specialized then that
2282 specialization shall be declared before the first use of
2283 that specialization that would cause an implicit
2284 instantiation to take place, in every translation unit in
2285 which such a use occurs. */
2286 error ("explicit specialization of %qD after first use",
2289 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2290 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2291 && DECL_DECLARED_INLINE_P (newdecl
));
2293 /* Don't propagate visibility from the template to the
2294 specialization here. We'll do that in determine_visibility if
2296 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2298 /* [temp.expl.spec/14] We don't inline explicit specialization
2299 just because the primary template says so. */
2301 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2302 the always_inline attribute. */
2303 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2304 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2306 if (DECL_DECLARED_INLINE_P (newdecl
))
2307 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2309 DECL_ATTRIBUTES (newdecl
)
2310 = remove_attribute ("always_inline",
2311 DECL_ATTRIBUTES (newdecl
));
2314 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2316 /* Never inline re-defined extern inline functions.
2317 FIXME: this could be better handled by keeping both
2318 function as separate declarations. */
2319 DECL_UNINLINABLE (newdecl
) = 1;
2323 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2324 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2326 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2328 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2329 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2331 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2332 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2333 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2334 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2337 /* Preserve abstractness on cloned [cd]tors. */
2338 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2340 /* Update newdecl's parms to point at olddecl. */
2341 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2342 parm
= DECL_CHAIN (parm
))
2343 DECL_CONTEXT (parm
) = olddecl
;
2347 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2348 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2349 COPY_DECL_RTL (newdecl
, olddecl
);
2351 if (! types_match
|| new_defines_function
)
2353 /* These need to be copied so that the names are available.
2354 Note that if the types do match, we'll preserve inline
2355 info and other bits, but if not, we won't. */
2356 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2357 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2359 /* If redeclaring a builtin function, it stays built in
2360 if newdecl is a gnu_inline definition, or if newdecl is just
2362 if (DECL_BUILT_IN (olddecl
)
2363 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2365 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2366 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2367 /* If we're keeping the built-in definition, keep the rtl,
2368 regardless of declaration matches. */
2369 COPY_DECL_RTL (olddecl
, newdecl
);
2370 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2372 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2375 /* If a compatible prototype of these builtin functions
2376 is seen, assume the runtime implements it with the
2377 expected semantics. */
2378 case BUILT_IN_STPCPY
:
2379 if (builtin_decl_explicit_p (fncode
))
2380 set_builtin_decl_implicit_p (fncode
, true);
2383 if (builtin_decl_explicit_p (fncode
))
2384 set_builtin_decl_declared_p (fncode
, true);
2389 if (new_defines_function
)
2390 /* If defining a function declared with other language
2391 linkage, use the previously declared language linkage. */
2392 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2393 else if (types_match
)
2395 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2396 /* Don't clear out the arguments if we're just redeclaring a
2398 if (DECL_ARGUMENTS (olddecl
))
2399 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2402 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2403 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2405 /* Now preserve various other info from the definition. */
2406 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2407 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2408 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2409 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2411 /* Warn about conflicting visibility specifications. */
2412 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2413 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2414 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2416 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2417 "%qD: visibility attribute ignored because it "
2418 "conflicts with previous declaration", newdecl
))
2419 inform (DECL_SOURCE_LOCATION (olddecl
),
2420 "previous declaration of %qD", olddecl
);
2422 /* Choose the declaration which specified visibility. */
2423 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2425 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2426 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2428 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2429 so keep this behavior. */
2430 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2432 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2433 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2435 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2436 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2438 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2439 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2441 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2442 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2443 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2445 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2446 with that from NEWDECL below. */
2447 if (DECL_LANG_SPECIFIC (olddecl
))
2449 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2450 != DECL_LANG_SPECIFIC (newdecl
));
2451 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2454 /* Merge the USED information. */
2455 if (TREE_USED (olddecl
))
2456 TREE_USED (newdecl
) = 1;
2457 else if (TREE_USED (newdecl
))
2458 TREE_USED (olddecl
) = 1;
2459 if (VAR_P (newdecl
))
2461 if (DECL_READ_P (olddecl
))
2462 DECL_READ_P (newdecl
) = 1;
2463 else if (DECL_READ_P (newdecl
))
2464 DECL_READ_P (olddecl
) = 1;
2466 if (DECL_PRESERVE_P (olddecl
))
2467 DECL_PRESERVE_P (newdecl
) = 1;
2468 else if (DECL_PRESERVE_P (newdecl
))
2469 DECL_PRESERVE_P (olddecl
) = 1;
2471 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2472 to olddecl and deleted. */
2473 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2474 && DECL_FUNCTION_VERSIONED (olddecl
))
2476 /* Set the flag for newdecl so that it gets copied to olddecl. */
2477 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2478 /* newdecl will be purged after copying to olddecl and is no longer
2480 cgraph_node::delete_function_version (newdecl
);
2483 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2486 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2488 function_size
= sizeof (struct tree_decl_common
);
2490 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2491 (char *) newdecl
+ sizeof (struct tree_common
),
2492 function_size
- sizeof (struct tree_common
));
2494 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2495 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2496 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2498 /* Preserve symtab node mapping. */
2499 olddecl
->decl_with_vis
.symtab_node
= snode
;
2501 if (new_template_info
)
2502 /* If newdecl is a template instantiation, it is possible that
2503 the following sequence of events has occurred:
2505 o A friend function was declared in a class template. The
2506 class template was instantiated.
2508 o The instantiation of the friend declaration was
2509 recorded on the instantiation list, and is newdecl.
2511 o Later, however, instantiate_class_template called pushdecl
2512 on the newdecl to perform name injection. But, pushdecl in
2513 turn called duplicate_decls when it discovered that another
2514 declaration of a global function with the same name already
2517 o Here, in duplicate_decls, we decided to clobber newdecl.
2519 If we're going to do that, we'd better make sure that
2520 olddecl, and not newdecl, is on the list of
2521 instantiations so that if we try to do the instantiation
2522 again we won't get the clobbered declaration. */
2523 reregister_specialization (newdecl
,
2529 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2531 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2532 (char *) newdecl
+ sizeof (struct tree_common
),
2533 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2534 switch (TREE_CODE (newdecl
))
2544 struct symtab_node
*snode
= NULL
;
2547 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
)
2548 || DECL_EXTERNAL (olddecl
)))
2549 snode
= symtab_node::get (olddecl
);
2550 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2551 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2552 size
- sizeof (struct tree_decl_common
)
2553 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2554 if (VAR_P (newdecl
))
2555 olddecl
->decl_with_vis
.symtab_node
= snode
;
2559 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2560 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2561 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2562 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2567 if (VAR_OR_FUNCTION_DECL_P (newdecl
))
2569 if (DECL_EXTERNAL (olddecl
)
2570 || TREE_PUBLIC (olddecl
)
2571 || TREE_STATIC (olddecl
))
2573 /* Merge the section attribute.
2574 We want to issue an error if the sections conflict but that must be
2575 done later in decl_attributes since we are called before attributes
2577 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2578 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2580 if (DECL_ONE_ONLY (newdecl
))
2582 struct symtab_node
*oldsym
, *newsym
;
2583 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2584 oldsym
= cgraph_node::get_create (olddecl
);
2586 oldsym
= varpool_node::get_create (olddecl
);
2587 newsym
= symtab_node::get (newdecl
);
2588 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2593 && CP_DECL_THREAD_LOCAL_P (newdecl
))
2595 CP_DECL_THREAD_LOCAL_P (olddecl
) = true;
2596 if (!processing_template_decl
)
2597 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2601 DECL_UID (olddecl
) = olddecl_uid
;
2603 DECL_FRIEND_P (olddecl
) = 1;
2606 DECL_ANTICIPATED (olddecl
) = 1;
2607 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2610 /* NEWDECL contains the merged attribute lists.
2611 Update OLDDECL to be the same. */
2612 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2614 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2615 so that encode_section_info has a chance to look at the new decl
2616 flags and attributes. */
2617 if (DECL_RTL_SET_P (olddecl
)
2618 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2620 && TREE_STATIC (olddecl
))))
2621 make_decl_rtl (olddecl
);
2623 /* The NEWDECL will no longer be needed. Because every out-of-class
2624 declaration of a member results in a call to duplicate_decls,
2625 freeing these nodes represents in a significant savings.
2627 Before releasing the node, be sore to remove function from symbol
2628 table that might have been inserted there to record comdat group.
2629 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2630 structure is shared in between newdecl and oldecl. */
2631 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2632 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2633 if (VAR_OR_FUNCTION_DECL_P (newdecl
))
2635 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2640 /* Remove the associated constraints for newdecl, if any, before
2641 reclaiming memory. */
2643 remove_constraints (newdecl
);
2650 /* Return zero if the declaration NEWDECL is valid
2651 when the declaration OLDDECL (assumed to be for the same name)
2652 has already been seen.
2653 Otherwise return an error message format string with a %s
2654 where the identifier should go. */
2657 redeclaration_error_message (tree newdecl
, tree olddecl
)
2659 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2661 /* Because C++ can put things into name space for free,
2662 constructs like "typedef struct foo { ... } foo"
2663 would look like an erroneous redeclaration. */
2664 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2667 return G_("redefinition of %q#D");
2669 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2671 /* If this is a pure function, its olddecl will actually be
2672 the original initialization to `0' (which we force to call
2673 abort()). Don't complain about redefinition in this case. */
2674 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2675 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2678 /* If both functions come from different namespaces, this is not
2679 a redeclaration - this is a conflict with a used function. */
2680 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2681 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2682 && ! decls_match (olddecl
, newdecl
))
2683 return G_("%qD conflicts with used function");
2685 /* We'll complain about linkage mismatches in
2686 warn_extern_redeclared_static. */
2688 /* Defining the same name twice is no good. */
2689 if (DECL_INITIAL (olddecl
) != NULL_TREE
2690 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2692 if (DECL_NAME (olddecl
) == NULL_TREE
)
2693 return G_("%q#D not declared in class");
2694 else if (!GNU_INLINE_P (olddecl
)
2695 || GNU_INLINE_P (newdecl
))
2696 return G_("redefinition of %q#D");
2699 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2701 bool olda
= GNU_INLINE_P (olddecl
);
2702 bool newa
= GNU_INLINE_P (newdecl
);
2707 return G_("%q+D redeclared inline with "
2708 "%<gnu_inline%> attribute");
2710 return G_("%q+D redeclared inline without "
2711 "%<gnu_inline%> attribute");
2715 check_abi_tag_redeclaration
2716 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2717 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2721 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2725 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2727 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2728 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2729 return G_("redefinition of %q#D");
2733 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2734 || (DECL_TEMPLATE_RESULT (newdecl
)
2735 == DECL_TEMPLATE_RESULT (olddecl
)))
2738 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2739 if (DECL_TEMPLATE_INFO (nt
))
2740 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2741 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2742 if (DECL_TEMPLATE_INFO (ot
))
2743 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2744 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2745 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2746 return G_("redefinition of %q#D");
2748 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2750 bool olda
= GNU_INLINE_P (ot
);
2751 bool newa
= GNU_INLINE_P (nt
);
2756 return G_("%q+D redeclared inline with "
2757 "%<gnu_inline%> attribute");
2759 return G_("%q+D redeclared inline without "
2760 "%<gnu_inline%> attribute");
2764 /* Core issue #226 (C++0x):
2766 If a friend function template declaration specifies a
2767 default template-argument, that declaration shall be a
2768 definition and shall be the only declaration of the
2769 function template in the translation unit. */
2770 if ((cxx_dialect
!= cxx98
)
2771 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2772 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2773 /*is_primary=*/true,
2774 /*is_partial=*/false,
2775 /*is_friend_decl=*/2))
2776 return G_("redeclaration of friend %q#D "
2777 "may not have default template arguments");
2781 else if (VAR_P (newdecl
)
2782 && CP_DECL_THREAD_LOCAL_P (newdecl
) != CP_DECL_THREAD_LOCAL_P (olddecl
)
2783 && (! DECL_LANG_SPECIFIC (olddecl
)
2784 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2785 || CP_DECL_THREAD_LOCAL_P (newdecl
)))
2787 /* Only variables can be thread-local, and all declarations must
2788 agree on this property. */
2789 if (CP_DECL_THREAD_LOCAL_P (newdecl
))
2790 return G_("thread-local declaration of %q#D follows "
2791 "non-thread-local declaration");
2793 return G_("non-thread-local declaration of %q#D follows "
2794 "thread-local declaration");
2796 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2798 /* The objects have been declared at namespace scope. If either
2799 is a member of an anonymous union, then this is an invalid
2800 redeclaration. For example:
2806 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2807 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2808 return G_("redeclaration of %q#D");
2809 /* If at least one declaration is a reference, there is no
2810 conflict. For example:
2816 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2818 /* Reject two definitions. */
2819 return G_("redefinition of %q#D");
2823 /* Objects declared with block scope: */
2824 /* Reject two definitions, and reject a definition
2825 together with an external reference. */
2826 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2827 return G_("redeclaration of %q#D");
2832 /* Hash and equality functions for the named_label table. */
2835 named_label_hasher::hash (named_label_entry
*ent
)
2837 return DECL_UID (ent
->label_decl
);
2841 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2843 return a
->label_decl
== b
->label_decl
;
2846 /* Create a new label, named ID. */
2849 make_label_decl (tree id
, int local_p
)
2851 struct named_label_entry
*ent
;
2854 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2856 DECL_CONTEXT (decl
) = current_function_decl
;
2857 DECL_MODE (decl
) = VOIDmode
;
2858 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2860 /* Say where one reference is to the label, for the sake of the
2861 error if it is not defined. */
2862 DECL_SOURCE_LOCATION (decl
) = input_location
;
2864 /* Record the fact that this identifier is bound to this label. */
2865 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2867 /* Create the label htab for the function on demand. */
2869 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2871 /* Record this label on the list of labels used in this function.
2872 We do this before calling make_label_decl so that we get the
2873 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2874 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2875 ent
->label_decl
= decl
;
2877 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2878 gcc_assert (*slot
== NULL
);
2884 /* Look for a label named ID in the current function. If one cannot
2885 be found, create one. (We keep track of used, but undefined,
2886 labels, and complain about them at the end of a function.) */
2889 lookup_label_1 (tree id
)
2893 /* You can't use labels at global scope. */
2894 if (current_function_decl
== NULL_TREE
)
2896 error ("label %qE referenced outside of any function", id
);
2900 /* See if we've already got this label. */
2901 decl
= IDENTIFIER_LABEL_VALUE (id
);
2902 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2905 decl
= make_label_decl (id
, /*local_p=*/0);
2909 /* Wrapper for lookup_label_1. */
2912 lookup_label (tree id
)
2915 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2916 ret
= lookup_label_1 (id
);
2917 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2921 /* Declare a local label named ID. */
2924 declare_local_label (tree id
)
2927 cp_label_binding bind
;
2929 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2930 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2931 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2933 decl
= make_label_decl (id
, /*local_p=*/1);
2935 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2940 /* Returns nonzero if it is ill-formed to jump past the declaration of
2941 DECL. Returns 2 if it's also a real problem. */
2944 decl_jump_unsafe (tree decl
)
2946 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2947 with automatic storage duration is not in scope to a point where it is
2948 in scope is ill-formed unless the variable has scalar type, class type
2949 with a trivial default constructor and a trivial destructor, a
2950 cv-qualified version of one of these types, or an array of one of the
2951 preceding types and is declared without an initializer (8.5). */
2952 tree type
= TREE_TYPE (decl
);
2954 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2955 || type
== error_mark_node
)
2958 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2959 || variably_modified_type_p (type
, NULL_TREE
))
2962 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2968 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2971 identify_goto (tree decl
, const location_t
*locus
)
2973 bool complained
= (decl
2974 ? permerror (input_location
, "jump to label %qD", decl
)
2975 : permerror (input_location
, "jump to case label"));
2976 if (complained
&& locus
)
2977 inform (*locus
, " from here");
2981 /* Check that a single previously seen jump to a newly defined label
2982 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2983 the jump context; NAMES are the names in scope in LEVEL at the jump
2984 context; LOCUS is the source position of the jump or 0. Returns
2985 true if all is well. */
2988 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2989 bool exited_omp
, const location_t
*locus
)
2991 cp_binding_level
*b
;
2992 bool identified
= false, complained
= false;
2993 bool saw_eh
= false, saw_omp
= false, saw_tm
= false;
2997 complained
= identify_goto (decl
, locus
);
2999 inform (input_location
, " exits OpenMP structured block");
3000 identified
= saw_omp
= true;
3003 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3005 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
3007 for (new_decls
= b
->names
; new_decls
!= old_decls
;
3008 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
3009 : TREE_CHAIN (new_decls
)))
3011 int problem
= decl_jump_unsafe (new_decls
);
3017 complained
= identify_goto (decl
, locus
);
3023 inform (DECL_SOURCE_LOCATION (new_decls
),
3024 " crosses initialization of %q#D", new_decls
);
3026 inform (DECL_SOURCE_LOCATION (new_decls
),
3027 " enters scope of %q#D which has "
3028 "non-trivial destructor", new_decls
);
3034 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
3038 complained
= identify_goto (decl
, locus
);
3043 if (b
->kind
== sk_try
)
3044 inform (input_location
, " enters try block");
3046 inform (input_location
, " enters catch block");
3050 if (b
->kind
== sk_omp
&& !saw_omp
)
3054 complained
= identify_goto (decl
, locus
);
3058 inform (input_location
, " enters OpenMP structured block");
3061 if (b
->kind
== sk_transaction
&& !saw_tm
)
3065 complained
= identify_goto (decl
, locus
);
3069 inform (input_location
,
3070 " enters synchronized or atomic statement");
3079 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
3081 check_previous_goto_1 (decl
, use
->binding_level
,
3082 use
->names_in_scope
, use
->in_omp_scope
,
3083 &use
->o_goto_locus
);
3087 check_switch_goto (cp_binding_level
* level
)
3089 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
3092 /* Check that a new jump to a label DECL is OK. Called by
3093 finish_goto_stmt. */
3096 check_goto (tree decl
)
3098 struct named_label_entry
*ent
, dummy
;
3099 bool saw_catch
= false, identified
= false, complained
= false;
3103 /* We can't know where a computed goto is jumping.
3104 So we assume that it's OK. */
3105 if (TREE_CODE (decl
) != LABEL_DECL
)
3108 /* We didn't record any information about this label when we created it,
3109 and there's not much point since it's trivial to analyze as a return. */
3110 if (decl
== cdtor_label
)
3113 dummy
.label_decl
= decl
;
3114 ent
= named_labels
->find (&dummy
);
3115 gcc_assert (ent
!= NULL
);
3117 /* If the label hasn't been defined yet, defer checking. */
3118 if (! DECL_INITIAL (decl
))
3120 struct named_label_use_entry
*new_use
;
3122 /* Don't bother creating another use if the last goto had the
3123 same data, and will therefore create the same set of errors. */
3125 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3128 new_use
= ggc_alloc
<named_label_use_entry
> ();
3129 new_use
->binding_level
= current_binding_level
;
3130 new_use
->names_in_scope
= current_binding_level
->names
;
3131 new_use
->o_goto_locus
= input_location
;
3132 new_use
->in_omp_scope
= false;
3134 new_use
->next
= ent
->uses
;
3135 ent
->uses
= new_use
;
3139 if (ent
->in_try_scope
|| ent
->in_catch_scope
|| ent
->in_transaction_scope
3140 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3142 complained
= permerror (DECL_SOURCE_LOCATION (decl
),
3143 "jump to label %qD", decl
);
3145 inform (input_location
, " from here");
3149 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3151 int u
= decl_jump_unsafe (bad
);
3153 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3155 /* Can't skip init of __exception_info. */
3157 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3160 else if (complained
)
3163 inform (DECL_SOURCE_LOCATION (bad
),
3164 " skips initialization of %q#D", bad
);
3166 inform (DECL_SOURCE_LOCATION (bad
),
3167 " enters scope of %q#D which has "
3168 "non-trivial destructor", bad
);
3174 if (ent
->in_try_scope
)
3175 inform (input_location
, " enters try block");
3176 else if (ent
->in_catch_scope
&& !saw_catch
)
3177 inform (input_location
, " enters catch block");
3178 else if (ent
->in_transaction_scope
)
3179 inform (input_location
, " enters synchronized or atomic statement");
3182 if (ent
->in_omp_scope
)
3185 inform (input_location
, " enters OpenMP structured block");
3187 else if (flag_openmp
)
3189 cp_binding_level
*b
;
3190 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3192 if (b
== ent
->binding_level
)
3194 if (b
->kind
== sk_omp
)
3198 complained
= permerror (DECL_SOURCE_LOCATION (decl
),
3199 "jump to label %qD", decl
);
3201 inform (input_location
, " from here");
3205 inform (input_location
, " exits OpenMP structured block");
3212 /* Check that a return is ok wrt OpenMP structured blocks.
3213 Called by finish_return_stmt. Returns true if all is well. */
3216 check_omp_return (void)
3218 cp_binding_level
*b
;
3219 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3220 if (b
->kind
== sk_omp
)
3222 error ("invalid exit from OpenMP structured block");
3225 else if (b
->kind
== sk_function_parms
)
3230 /* Define a label, specifying the location in the source file.
3231 Return the LABEL_DECL node for the label. */
3234 define_label_1 (location_t location
, tree name
)
3236 struct named_label_entry
*ent
, dummy
;
3237 cp_binding_level
*p
;
3240 decl
= lookup_label (name
);
3242 dummy
.label_decl
= decl
;
3243 ent
= named_labels
->find (&dummy
);
3244 gcc_assert (ent
!= NULL
);
3246 /* After labels, make any new cleanups in the function go into their
3247 own new (temporary) binding contour. */
3248 for (p
= current_binding_level
;
3249 p
->kind
!= sk_function_parms
;
3251 p
->more_cleanups_ok
= 0;
3253 if (name
== get_identifier ("wchar_t"))
3254 permerror (input_location
, "label named wchar_t");
3256 if (DECL_INITIAL (decl
) != NULL_TREE
)
3258 error ("duplicate label %qD", decl
);
3259 return error_mark_node
;
3263 struct named_label_use_entry
*use
;
3265 /* Mark label as having been defined. */
3266 DECL_INITIAL (decl
) = error_mark_node
;
3267 /* Say where in the source. */
3268 DECL_SOURCE_LOCATION (decl
) = location
;
3270 ent
->binding_level
= current_binding_level
;
3271 ent
->names_in_scope
= current_binding_level
->names
;
3273 for (use
= ent
->uses
; use
; use
= use
->next
)
3274 check_previous_goto (decl
, use
);
3281 /* Wrapper for define_label_1. */
3284 define_label (location_t location
, tree name
)
3287 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3288 ret
= define_label_1 (location
, name
);
3289 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3296 cp_binding_level
*level
;
3297 struct cp_switch
*next
;
3298 /* The SWITCH_STMT being built. */
3300 /* A splay-tree mapping the low element of a case range to the high
3301 element, or NULL_TREE if there is no high element. Used to
3302 determine whether or not a new case label duplicates an old case
3303 label. We need a tree, rather than simply a hash table, because
3304 of the GNU case range extension. */
3306 /* Remember whether there was a case value that is outside the
3307 range of the original type of the controlling expression. */
3308 bool outside_range_p
;
3311 /* A stack of the currently active switch statements. The innermost
3312 switch statement is on the top of the stack. There is no need to
3313 mark the stack for garbage collection because it is only active
3314 during the processing of the body of a function, and we never
3315 collect at that point. */
3317 static struct cp_switch
*switch_stack
;
3319 /* Called right after a switch-statement condition is parsed.
3320 SWITCH_STMT is the switch statement being parsed. */
3323 push_switch (tree switch_stmt
)
3325 struct cp_switch
*p
= XNEW (struct cp_switch
);
3326 p
->level
= current_binding_level
;
3327 p
->next
= switch_stack
;
3328 p
->switch_stmt
= switch_stmt
;
3329 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3330 p
->outside_range_p
= false;
3337 struct cp_switch
*cs
= switch_stack
;
3338 location_t switch_location
;
3340 /* Emit warnings as needed. */
3341 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3342 const bool bool_cond_p
3343 = (SWITCH_STMT_TYPE (cs
->switch_stmt
)
3344 && TREE_CODE (SWITCH_STMT_TYPE (cs
->switch_stmt
)) == BOOLEAN_TYPE
);
3345 if (!processing_template_decl
)
3346 c_do_switch_warnings (cs
->cases
, switch_location
,
3347 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3348 SWITCH_STMT_COND (cs
->switch_stmt
),
3349 bool_cond_p
, cs
->outside_range_p
);
3351 splay_tree_delete (cs
->cases
);
3352 switch_stack
= switch_stack
->next
;
3356 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3357 condition. Note that if TYPE and VALUE are already integral we don't
3358 really do the conversion because the language-independent
3359 warning/optimization code will work better that way. */
3362 case_conversion (tree type
, tree value
)
3364 if (value
== NULL_TREE
)
3367 if (cxx_dialect
>= cxx11
3368 && (SCOPED_ENUM_P (type
)
3369 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3371 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3372 type
= type_promotes_to (type
);
3373 value
= (perform_implicit_conversion_flags
3374 (type
, value
, tf_warning_or_error
,
3375 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3377 return cxx_constant_value (value
);
3380 /* Note that we've seen a definition of a case label, and complain if this
3381 is a bad place for one. */
3384 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3387 cp_binding_level
*p
;
3390 if (processing_template_decl
)
3394 /* For templates, just add the case label; we'll do semantic
3395 analysis at instantiation-time. */
3396 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3397 return add_stmt (build_case_label (low_value
, high_value
, label
));
3400 /* Find the condition on which this switch statement depends. */
3401 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3402 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3403 cond
= TREE_VALUE (cond
);
3405 if (!check_switch_goto (switch_stack
->level
))
3406 return error_mark_node
;
3408 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3410 low_value
= case_conversion (type
, low_value
);
3411 high_value
= case_conversion (type
, high_value
);
3413 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3414 low_value
, high_value
,
3415 &switch_stack
->outside_range_p
);
3417 /* After labels, make any new cleanups in the function go into their
3418 own new (temporary) binding contour. */
3419 for (p
= current_binding_level
;
3420 p
->kind
!= sk_function_parms
;
3422 p
->more_cleanups_ok
= 0;
3427 struct typename_info
{
3435 struct typename_hasher
: ggc_ptr_hash
<tree_node
>
3437 typedef typename_info
*compare_type
;
3439 /* Hash a TYPENAME_TYPE. */
3446 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3447 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3452 /* Compare two TYPENAME_TYPEs. */
3455 equal (tree t1
, const typename_info
*t2
)
3457 return (TYPE_IDENTIFIER (t1
) == t2
->name
3458 && TYPE_CONTEXT (t1
) == t2
->scope
3459 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3460 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3461 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3465 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3466 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3468 Returns the new TYPENAME_TYPE. */
3470 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3473 build_typename_type (tree context
, tree name
, tree fullname
,
3474 enum tag_types tag_type
)
3482 if (typename_htab
== NULL
)
3483 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3485 ti
.scope
= FROB_CONTEXT (context
);
3487 ti
.template_id
= fullname
;
3488 ti
.enum_p
= tag_type
== enum_type
;
3489 ti
.class_p
= (tag_type
== class_type
3490 || tag_type
== record_type
3491 || tag_type
== union_type
);
3492 hash
= (htab_hash_pointer (ti
.scope
)
3493 ^ htab_hash_pointer (ti
.name
));
3495 /* See if we already have this type. */
3496 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3501 /* Build the TYPENAME_TYPE. */
3502 t
= cxx_make_type (TYPENAME_TYPE
);
3503 TYPE_CONTEXT (t
) = ti
.scope
;
3504 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3505 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3506 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3508 /* Build the corresponding TYPE_DECL. */
3509 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3510 TYPE_NAME (TREE_TYPE (d
)) = d
;
3511 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3512 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3513 DECL_ARTIFICIAL (d
) = 1;
3515 /* Store it in the hash table. */
3518 /* TYPENAME_TYPEs must always be compared structurally, because
3519 they may or may not resolve down to another type depending on
3520 the currently open classes. */
3521 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3527 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3528 provided to name the type. Returns an appropriate type, unless an
3529 error occurs, in which case error_mark_node is returned. If we
3530 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3531 return that, rather than the _TYPE it corresponds to, in other
3532 cases we look through the type decl. If TF_ERROR is set, complain
3533 about errors, otherwise be quiet. */
3536 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3537 tsubst_flags_t complain
)
3543 if (name
== error_mark_node
3544 || context
== NULL_TREE
3545 || context
== error_mark_node
)
3546 return error_mark_node
;
3550 if (!(TYPE_LANG_SPECIFIC (name
)
3551 && (CLASSTYPE_IS_TEMPLATE (name
)
3552 || CLASSTYPE_USE_TEMPLATE (name
))))
3553 name
= TYPE_IDENTIFIER (name
);
3555 /* Create a TEMPLATE_ID_EXPR for the type. */
3556 name
= build_nt (TEMPLATE_ID_EXPR
,
3557 CLASSTYPE_TI_TEMPLATE (name
),
3558 CLASSTYPE_TI_ARGS (name
));
3560 else if (TREE_CODE (name
) == TYPE_DECL
)
3561 name
= DECL_NAME (name
);
3565 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3567 name
= TREE_OPERAND (name
, 0);
3568 if (DECL_TYPE_TEMPLATE_P (name
))
3569 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3570 if (TREE_CODE (name
) != IDENTIFIER_NODE
)
3572 if (complain
& tf_error
)
3573 error ("%qD is not a type", name
);
3574 return error_mark_node
;
3577 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3579 if (complain
& tf_error
)
3580 error ("%qD used without template parameters", name
);
3581 return error_mark_node
;
3583 gcc_assert (identifier_p (name
));
3584 gcc_assert (TYPE_P (context
));
3586 if (!MAYBE_CLASS_TYPE_P (context
))
3588 if (complain
& tf_error
)
3589 error ("%q#T is not a class", context
);
3590 return error_mark_node
;
3593 /* When the CONTEXT is a dependent type, NAME could refer to a
3594 dependent base class of CONTEXT. But look inside it anyway
3595 if CONTEXT is a currently open scope, in case it refers to a
3596 member of the current instantiation or a non-dependent base;
3597 lookup will stop when we hit a dependent base. */
3598 if (!dependent_scope_p (context
))
3599 /* We should only set WANT_TYPE when we're a nested typename type.
3600 Then we can give better diagnostics if we find a non-type. */
3601 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3605 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3606 return build_typename_type (context
, name
, fullname
, tag_type
);
3608 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3612 if (complain
& tf_error
)
3613 error (want_template
? G_("no class template named %q#T in %q#T")
3614 : G_("no type named %q#T in %q#T"), name
, context
);
3615 return error_mark_node
;
3618 /* Pull out the template from an injected-class-name (or multiple). */
3620 t
= maybe_get_template_decl_from_type_decl (t
);
3622 if (TREE_CODE (t
) == TREE_LIST
)
3624 if (complain
& tf_error
)
3626 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3627 print_candidates (t
);
3629 return error_mark_node
;
3632 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3634 if (complain
& tf_error
)
3635 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3637 return error_mark_node
;
3639 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3641 if (complain
& tf_error
)
3642 error ("%<typename %T::%D%> names %q#T, which is not a type",
3644 return error_mark_node
;
3647 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3648 return error_mark_node
;
3650 /* If we are currently parsing a template and if T is a typedef accessed
3651 through CONTEXT then we need to remember and check access of T at
3652 template instantiation time. */
3653 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3656 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3658 /*entering_scope=*/0,
3659 complain
| tf_user
);
3661 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3664 maybe_record_typedef_use (t
);
3669 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3670 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3671 in which case error_mark_node is returned.
3673 If PARM_LIST is non-NULL, also make sure that the template parameter
3674 list of TEMPLATE_DECL matches.
3676 If COMPLAIN zero, don't complain about any errors that occur. */
3679 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3680 tsubst_flags_t complain
)
3686 name
= TYPE_IDENTIFIER (name
);
3687 else if (DECL_P (name
))
3688 name
= DECL_NAME (name
);
3689 gcc_assert (identifier_p (name
));
3691 if (!dependent_type_p (context
)
3692 || currently_open_class (context
))
3694 tree tmpl
= NULL_TREE
;
3696 if (MAYBE_CLASS_TYPE_P (context
))
3697 tmpl
= lookup_field (context
, name
, 0, false);
3699 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3700 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3702 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3704 if (complain
& tf_error
)
3705 error ("no class template named %q#T in %q#T", name
, context
);
3706 return error_mark_node
;
3710 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3712 if (complain
& tf_error
)
3714 error ("template parameters do not match template %qD", tmpl
);
3715 inform (DECL_SOURCE_LOCATION (tmpl
),
3716 "%qD declared here", tmpl
);
3718 return error_mark_node
;
3721 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3723 return error_mark_node
;
3728 /* Build the UNBOUND_CLASS_TEMPLATE. */
3729 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3730 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3731 TREE_TYPE (t
) = NULL_TREE
;
3732 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3734 /* Build the corresponding TEMPLATE_DECL. */
3735 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3736 TYPE_NAME (TREE_TYPE (d
)) = d
;
3737 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3738 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3739 DECL_ARTIFICIAL (d
) = 1;
3740 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3747 /* Push the declarations of builtin types into the namespace.
3748 RID_INDEX is the index of the builtin type in the array
3749 RID_POINTERS. NAME is the name used when looking up the builtin
3750 type. TYPE is the _TYPE node for the builtin type. */
3753 record_builtin_type (enum rid rid_index
,
3757 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3758 tree tdecl
= NULL_TREE
;
3760 if ((int) rid_index
< (int) RID_MAX
)
3761 rname
= ridpointers
[(int) rid_index
];
3763 tname
= get_identifier (name
);
3765 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3766 eliminated. Built-in types should not be looked up name; their
3767 names are keywords that the parser can recognize. However, there
3768 is code in c-common.c that uses identifier_global_value to look
3769 up built-in types by name. */
3772 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3773 DECL_ARTIFICIAL (tdecl
) = 1;
3774 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3780 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3781 DECL_ARTIFICIAL (tdecl
) = 1;
3783 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3786 if (!TYPE_NAME (type
))
3787 TYPE_NAME (type
) = tdecl
;
3790 debug_hooks
->type_decl (tdecl
, 0);
3793 /* Record one of the standard Java types.
3794 * Declare it as having the given NAME.
3795 * If SIZE > 0, it is the size of one of the integral types;
3796 * otherwise it is the negative of the size of one of the other types. */
3799 record_builtin_java_type (const char* name
, int size
)
3804 type
= build_nonstandard_integer_type (size
, 0);
3805 type
= build_distinct_type_copy (type
);
3807 else if (size
> -32)
3810 /* "__java_char" or ""__java_boolean". */
3811 type
= build_nonstandard_integer_type (-size
, 1);
3812 type
= build_distinct_type_copy (type
);
3813 /* Get the signed type cached and attached to the unsigned type,
3814 so it doesn't get garbage-collected at "random" times,
3815 causing potential codegen differences out of different UIDs
3816 and different alias set numbers. */
3817 stype
= build_nonstandard_integer_type (-size
, 0);
3818 stype
= build_distinct_type_copy (stype
);
3819 TREE_CHAIN (type
) = stype
;
3820 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3823 { /* "__java_float" or ""__java_double". */
3824 type
= make_node (REAL_TYPE
);
3825 TYPE_PRECISION (type
) = - size
;
3828 record_builtin_type (RID_MAX
, name
, type
);
3829 decl
= TYPE_NAME (type
);
3831 /* Suppress generate debug symbol entries for these types,
3832 since for normal C++ they are just clutter.
3833 However, push_lang_context undoes this if extern "Java" is seen. */
3834 DECL_IGNORED_P (decl
) = 1;
3836 TYPE_FOR_JAVA (type
) = 1;
3840 /* Push a type into the namespace so that the back ends ignore it. */
3843 record_unknown_type (tree type
, const char* name
)
3845 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3846 TYPE_DECL
, get_identifier (name
), type
));
3847 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3848 DECL_IGNORED_P (decl
) = 1;
3849 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3850 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3851 TYPE_ALIGN (type
) = 1;
3852 TYPE_USER_ALIGN (type
) = 0;
3853 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3856 /* A string for which we should create an IDENTIFIER_NODE at
3859 struct predefined_identifier
3861 /* The name of the identifier. */
3862 const char *const name
;
3863 /* The place where the IDENTIFIER_NODE should be stored. */
3865 /* Nonzero if this is the name of a constructor or destructor. */
3866 const int ctor_or_dtor_p
;
3869 /* Create all the predefined identifiers. */
3872 initialize_predefined_identifiers (void)
3874 const predefined_identifier
*pid
;
3876 /* A table of identifiers to create at startup. */
3877 static const predefined_identifier predefined_identifiers
[] = {
3878 { "C++", &lang_name_cplusplus
, 0 },
3879 { "C", &lang_name_c
, 0 },
3880 { "Java", &lang_name_java
, 0 },
3881 /* Some of these names have a trailing space so that it is
3882 impossible for them to conflict with names written by users. */
3883 { "__ct ", &ctor_identifier
, 1 },
3884 { "__base_ctor ", &base_ctor_identifier
, 1 },
3885 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3886 { "__dt ", &dtor_identifier
, 1 },
3887 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3888 { "__base_dtor ", &base_dtor_identifier
, 1 },
3889 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3890 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3891 { "nelts", &nelts_identifier
, 0 },
3892 { THIS_NAME
, &this_identifier
, 0 },
3893 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3894 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3895 { "_vptr", &vptr_identifier
, 0 },
3896 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3897 { "::", &global_scope_name
, 0 },
3898 { "std", &std_identifier
, 0 },
3902 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3904 *pid
->node
= get_identifier (pid
->name
);
3905 if (pid
->ctor_or_dtor_p
)
3906 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3910 /* Create the predefined scalar types of C,
3911 and some nodes representing standard constants (0, 1, (void *)0).
3912 Initialize the global binding level.
3913 Make definitions for built-in primitive functions. */
3916 cxx_init_decl_processing (void)
3919 tree void_ftype_ptr
;
3921 /* Create all the identifiers we need. */
3922 initialize_predefined_identifiers ();
3924 /* Create the global variables. */
3925 push_to_top_level ();
3927 current_function_decl
= NULL_TREE
;
3928 current_binding_level
= NULL
;
3929 /* Enter the global namespace. */
3930 gcc_assert (global_namespace
== NULL_TREE
);
3931 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3933 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3934 debug_hooks
->register_main_translation_unit
3935 (DECL_CONTEXT (global_namespace
));
3936 TREE_PUBLIC (global_namespace
) = 1;
3937 begin_scope (sk_namespace
, global_namespace
);
3939 if (flag_visibility_ms_compat
)
3940 default_visibility
= VISIBILITY_HIDDEN
;
3943 current_lang_name
= lang_name_c
;
3945 /* Create the `std' namespace. */
3946 push_namespace (std_identifier
);
3947 std_node
= current_namespace
;
3950 c_common_nodes_and_builtins ();
3952 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3953 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3954 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3955 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3956 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3957 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3958 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3959 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3961 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3963 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3964 truthvalue_type_node
= boolean_type_node
;
3965 truthvalue_false_node
= boolean_false_node
;
3966 truthvalue_true_node
= boolean_true_node
;
3968 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3969 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3970 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3973 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3976 delta_type_node
= ptrdiff_type_node
;
3977 vtable_index_type
= ptrdiff_type_node
;
3979 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3980 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3981 void_ftype_ptr
= build_function_type_list (void_type_node
,
3982 ptr_type_node
, NULL_TREE
);
3984 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3986 /* C++ extensions */
3988 unknown_type_node
= make_node (LANG_TYPE
);
3989 record_unknown_type (unknown_type_node
, "unknown type");
3991 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3992 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3994 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3996 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3997 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3999 init_list_type_node
= make_node (LANG_TYPE
);
4000 record_unknown_type (init_list_type_node
, "init list");
4003 /* Make sure we get a unique function type, so we can give
4004 its pointer type a name. (This wins for gdb.) */
4005 tree vfunc_type
= make_node (FUNCTION_TYPE
);
4006 TREE_TYPE (vfunc_type
) = integer_type_node
;
4007 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
4008 layout_type (vfunc_type
);
4010 vtable_entry_type
= build_pointer_type (vfunc_type
);
4012 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
4015 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
4016 layout_type (vtbl_type_node
);
4017 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
4018 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
4019 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
4020 layout_type (vtbl_ptr_type_node
);
4021 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
4023 push_namespace (get_identifier ("__cxxabiv1"));
4024 abi_node
= current_namespace
;
4027 global_type_node
= make_node (LANG_TYPE
);
4028 record_unknown_type (global_type_node
, "global type");
4031 current_lang_name
= lang_name_cplusplus
;
4034 tree newattrs
, extvisattr
;
4035 tree newtype
, deltype
;
4036 tree ptr_ftype_sizetype
;
4040 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
4041 if (cxx_dialect
== cxx98
)
4044 tree bad_alloc_type_node
;
4045 tree bad_alloc_decl
;
4047 push_namespace (std_identifier
);
4048 bad_alloc_id
= get_identifier ("bad_alloc");
4049 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
4050 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
4052 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
4053 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
4057 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
4060 new_eh_spec
= noexcept_false_spec
;
4062 /* Ensure attribs.c is initialized. */
4065 /* Ensure constraint.cc is initialized. */
4066 init_constraint_processing ();
4068 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
4070 newattrs
= tree_cons (get_identifier ("alloc_size"),
4071 build_tree_list (NULL_TREE
, integer_one_node
),
4073 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
4074 newtype
= build_exception_variant (newtype
, new_eh_spec
);
4075 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
4076 deltype
= build_exception_variant (deltype
, empty_except_spec
);
4077 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
4078 DECL_IS_MALLOC (opnew
) = 1;
4079 DECL_IS_OPERATOR_NEW (opnew
) = 1;
4080 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
4081 DECL_IS_MALLOC (opnew
) = 1;
4082 DECL_IS_OPERATOR_NEW (opnew
) = 1;
4083 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4084 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4085 if (flag_sized_deallocation
)
4087 /* Also push the sized deallocation variants:
4088 void operator delete(void*, std::size_t) throw();
4089 void operator delete[](void*, std::size_t) throw(); */
4090 tree void_ftype_ptr_size
4091 = build_function_type_list (void_type_node
, ptr_type_node
,
4092 size_type_node
, NULL_TREE
);
4093 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
4095 deltype
= build_exception_variant (deltype
, empty_except_spec
);
4096 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4097 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4100 nullptr_type_node
= make_node (NULLPTR_TYPE
);
4101 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
4102 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
4103 TYPE_UNSIGNED (nullptr_type_node
) = 1;
4104 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
4105 if (abi_version_at_least (9))
4106 TYPE_ALIGN (nullptr_type_node
) = GET_MODE_ALIGNMENT (ptr_mode
);
4107 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
4108 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
4109 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
4113 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
4114 ECF_NORETURN
| ECF_NOTHROW
);
4116 /* Perform other language dependent initializations. */
4117 init_class_processing ();
4118 init_rtti_processing ();
4119 init_template_processing ();
4121 if (flag_exceptions
)
4122 init_exception_processing ();
4124 if (! supports_one_only ())
4127 make_fname_decl
= cp_make_fname_decl
;
4128 start_fname_decls ();
4130 /* Show we use EH for cleanups. */
4131 if (flag_exceptions
)
4132 using_eh_for_cleanups ();
4135 /* Generate an initializer for a function naming variable from
4136 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4137 filled in with the type of the init. */
4140 cp_fname_init (const char* name
, tree
*type_p
)
4142 tree domain
= NULL_TREE
;
4144 tree init
= NULL_TREE
;
4149 length
= strlen (name
);
4150 domain
= build_index_type (size_int (length
));
4151 init
= build_string (length
+ 1, name
);
4154 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4155 type
= build_cplus_array_type (type
, domain
);
4160 TREE_TYPE (init
) = type
;
4162 init
= error_mark_node
;
4167 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4168 the decl, LOC is the location to give the decl, NAME is the
4169 initialization string and TYPE_DEP indicates whether NAME depended
4170 on the type of the function. We make use of that to detect
4171 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4172 at the point of first use, so we mustn't push the decl now. */
4175 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4177 const char *const name
= (type_dep
&& processing_template_decl
4178 ? NULL
: fname_as_string (type_dep
));
4180 tree init
= cp_fname_init (name
, &type
);
4181 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4184 free (CONST_CAST (char *, name
));
4186 /* As we're using pushdecl_with_scope, we must set the context. */
4187 DECL_CONTEXT (decl
) = current_function_decl
;
4189 TREE_STATIC (decl
) = 1;
4190 TREE_READONLY (decl
) = 1;
4191 DECL_ARTIFICIAL (decl
) = 1;
4193 TREE_USED (decl
) = 1;
4195 if (current_function_decl
)
4197 cp_binding_level
*b
= current_binding_level
;
4198 if (b
->kind
== sk_function_parms
)
4199 return error_mark_node
;
4200 while (b
->level_chain
->kind
!= sk_function_parms
)
4202 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4203 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4204 LOOKUP_ONLYCONVERTING
);
4208 DECL_THIS_STATIC (decl
) = true;
4209 pushdecl_top_level_and_finish (decl
, init
);
4216 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4218 tree id
= DECL_NAME (decl
);
4219 const char *name
= IDENTIFIER_POINTER (id
);
4221 retrofit_lang_decl (decl
);
4223 DECL_ARTIFICIAL (decl
) = 1;
4224 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4225 SET_DECL_LANGUAGE (decl
, lang_c
);
4226 /* Runtime library routines are, by definition, available in an
4227 external shared object. */
4228 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4229 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4231 DECL_CONTEXT (decl
) = context
;
4234 pushdecl_top_level (decl
);
4238 /* A function in the user's namespace should have an explicit
4239 declaration before it is used. Mark the built-in function as
4240 anticipated but not actually declared. */
4241 if (name
[0] != '_' || name
[1] != '_')
4242 DECL_ANTICIPATED (decl
) = 1;
4243 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4245 size_t len
= strlen (name
);
4247 /* Treat __*_chk fortification functions as anticipated as well,
4248 unless they are __builtin_*. */
4249 if (len
> strlen ("___chk")
4250 && memcmp (name
+ len
- strlen ("_chk"),
4251 "_chk", strlen ("_chk") + 1) == 0)
4252 DECL_ANTICIPATED (decl
) = 1;
4259 cxx_builtin_function (tree decl
)
4261 tree id
= DECL_NAME (decl
);
4262 const char *name
= IDENTIFIER_POINTER (id
);
4263 /* All builtins that don't begin with an '_' should additionally
4264 go in the 'std' namespace. */
4267 tree decl2
= copy_node(decl
);
4268 push_namespace (std_identifier
);
4269 builtin_function_1 (decl2
, std_node
, false);
4273 return builtin_function_1 (decl
, NULL_TREE
, false);
4276 /* Like cxx_builtin_function, but guarantee the function is added to the global
4277 scope. This is to allow function specific options to add new machine
4278 dependent builtins when the target ISA changes via attribute((target(...)))
4279 which saves space on program startup if the program does not use non-generic
4283 cxx_builtin_function_ext_scope (tree decl
)
4286 tree id
= DECL_NAME (decl
);
4287 const char *name
= IDENTIFIER_POINTER (id
);
4288 /* All builtins that don't begin with an '_' should additionally
4289 go in the 'std' namespace. */
4292 tree decl2
= copy_node(decl
);
4293 push_namespace (std_identifier
);
4294 builtin_function_1 (decl2
, std_node
, true);
4298 return builtin_function_1 (decl
, NULL_TREE
, true);
4301 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4302 function. Not called directly. */
4305 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4308 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4309 DECL_EXTERNAL (fn
) = 1;
4310 TREE_PUBLIC (fn
) = 1;
4311 DECL_ARTIFICIAL (fn
) = 1;
4312 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4313 SET_DECL_LANGUAGE (fn
, lang_c
);
4314 /* Runtime library routines are, by definition, available in an
4315 external shared object. */
4316 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4317 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4318 set_call_expr_flags (fn
, ecf_flags
);
4322 /* Returns the _DECL for a library function with C++ linkage. */
4325 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4328 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4329 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4330 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4334 /* Like build_library_fn, but takes a C string instead of an
4338 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4340 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4343 /* Like build_cp_library_fn, but takes a C string instead of an
4347 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4349 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4353 /* Like build_library_fn, but also pushes the function so that we will
4354 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4355 may throw exceptions listed in RAISES. */
4358 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4363 type
= build_exception_variant (type
, raises
);
4365 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4366 pushdecl_top_level (fn
);
4370 /* Like build_cp_library_fn, but also pushes the function so that it
4371 will be found by normal lookup. */
4374 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4377 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4382 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4386 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4390 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4392 tree type
= build_function_type (void_type_node
, parmtypes
);
4393 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4396 /* Like push_library_fn, but also note that this function throws
4397 and does not return. Used for __throw_foo and the like. */
4400 push_throw_library_fn (tree name
, tree type
)
4402 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4406 /* When we call finish_struct for an anonymous union, we create
4407 default copy constructors and such. But, an anonymous union
4408 shouldn't have such things; this function undoes the damage to the
4409 anonymous union type T.
4411 (The reason that we create the synthesized methods is that we don't
4412 distinguish `union { int i; }' from `typedef union { int i; } U'.
4413 The first is an anonymous union; the second is just an ordinary
4417 fixup_anonymous_aggr (tree t
)
4421 /* Wipe out memory of synthesized methods. */
4422 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4423 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4424 TYPE_HAS_COPY_CTOR (t
) = 0;
4425 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4426 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4427 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4429 /* Splice the implicitly generated functions out of the TYPE_METHODS
4431 q
= &TYPE_METHODS (t
);
4434 if (DECL_ARTIFICIAL (*q
))
4435 *q
= TREE_CHAIN (*q
);
4437 q
= &DECL_CHAIN (*q
);
4440 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4441 if (TYPE_METHODS (t
))
4443 tree decl
= TYPE_MAIN_DECL (t
);
4445 if (TREE_CODE (t
) != UNION_TYPE
)
4446 error_at (DECL_SOURCE_LOCATION (decl
),
4447 "an anonymous struct cannot have function members");
4449 error_at (DECL_SOURCE_LOCATION (decl
),
4450 "an anonymous union cannot have function members");
4453 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4454 assignment operators (because they cannot have these methods themselves).
4455 For anonymous unions this is already checked because they are not allowed
4456 in any union, otherwise we have to check it. */
4457 if (TREE_CODE (t
) != UNION_TYPE
)
4461 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4462 if (TREE_CODE (field
) == FIELD_DECL
)
4464 type
= TREE_TYPE (field
);
4465 if (CLASS_TYPE_P (type
))
4467 if (TYPE_NEEDS_CONSTRUCTING (type
))
4468 error ("member %q+#D with constructor not allowed "
4469 "in anonymous aggregate", field
);
4470 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4471 error ("member %q+#D with destructor not allowed "
4472 "in anonymous aggregate", field
);
4473 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4474 error ("member %q+#D with copy assignment operator "
4475 "not allowed in anonymous aggregate", field
);
4481 /* Warn for an attribute located at LOCATION that appertains to the
4482 class type CLASS_TYPE that has not been properly placed after its
4483 class-key, in it class-specifier. */
4486 warn_misplaced_attr_for_class_type (source_location location
,
4489 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4491 if (warning_at (location
, OPT_Wattributes
,
4492 "attribute ignored in declaration "
4493 "of %q#T", class_type
))
4495 "attribute for %q#T must follow the %qs keyword",
4496 class_type
, class_key_or_enum_as_string (class_type
));
4499 /* Make sure that a declaration with no declarator is well-formed, i.e.
4500 just declares a tagged type or anonymous union.
4502 Returns the type declared; or NULL_TREE if none. */
4505 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4506 bool explicit_type_instantiation_p
)
4508 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4509 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4510 /* If a class, struct, or enum type is declared by the DECLSPECS
4511 (i.e, if a class-specifier, enum-specifier, or non-typename
4512 elaborated-type-specifier appears in the DECLSPECS),
4513 DECLARED_TYPE is set to the corresponding type. */
4514 tree declared_type
= NULL_TREE
;
4515 bool error_p
= false;
4517 if (declspecs
->multiple_types_p
)
4518 error ("multiple types in one declaration");
4519 else if (declspecs
->redefined_builtin_type
)
4521 if (!in_system_header_at (input_location
))
4522 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4523 "redeclaration of C++ built-in type %qT",
4524 declspecs
->redefined_builtin_type
);
4529 && TYPE_P (declspecs
->type
)
4530 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4531 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4532 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4533 declared_type
= declspecs
->type
;
4534 else if (declspecs
->type
== error_mark_node
)
4536 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4537 permerror (input_location
, "declaration does not declare anything");
4538 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4540 error ("%<auto%> can only be specified for variables "
4541 "or function declarations");
4542 return error_mark_node
;
4544 /* Check for an anonymous union. */
4545 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4546 && TYPE_ANONYMOUS_P (declared_type
))
4548 /* 7/3 In a simple-declaration, the optional init-declarator-list
4549 can be omitted only when declaring a class (clause 9) or
4550 enumeration (7.2), that is, when the decl-specifier-seq contains
4551 either a class-specifier, an elaborated-type-specifier with
4552 a class-key (9.1), or an enum-specifier. In these cases and
4553 whenever a class-specifier or enum-specifier is present in the
4554 decl-specifier-seq, the identifiers in these specifiers are among
4555 the names being declared by the declaration (as class-name,
4556 enum-names, or enumerators, depending on the syntax). In such
4557 cases, and except for the declaration of an unnamed bit-field (9.6),
4558 the decl-specifier-seq shall introduce one or more names into the
4559 program, or shall redeclare a name introduced by a previous
4560 declaration. [Example:
4561 enum { }; // ill-formed
4562 typedef class { }; // ill-formed
4566 error ("missing type-name in typedef-declaration");
4569 /* Anonymous unions are objects, so they can have specifiers. */;
4570 SET_ANON_AGGR_TYPE_P (declared_type
);
4572 if (TREE_CODE (declared_type
) != UNION_TYPE
4573 && !in_system_header_at (input_location
))
4574 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4579 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
4580 error_at (declspecs
->locations
[ds_inline
],
4581 "%<inline%> can only be specified for functions");
4582 else if (decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4583 error_at (declspecs
->locations
[ds_virtual
],
4584 "%<virtual%> can only be specified for functions");
4586 && (!current_class_type
4587 || current_scope () != current_class_type
))
4588 error_at (declspecs
->locations
[ds_friend
],
4589 "%<friend%> can only be specified inside a class");
4590 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4591 error_at (declspecs
->locations
[ds_explicit
],
4592 "%<explicit%> can only be specified for constructors");
4593 else if (declspecs
->storage_class
)
4594 error_at (declspecs
->locations
[ds_storage_class
],
4595 "a storage class can only be specified for objects "
4597 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
4598 error_at (declspecs
->locations
[ds_const
],
4599 "%<const%> can only be specified for objects and "
4601 else if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
4602 error_at (declspecs
->locations
[ds_volatile
],
4603 "%<volatile%> can only be specified for objects and "
4605 else if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
4606 error_at (declspecs
->locations
[ds_restrict
],
4607 "%<__restrict%> can only be specified for objects and "
4609 else if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4610 error_at (declspecs
->locations
[ds_thread
],
4611 "%<__thread%> can only be specified for objects "
4613 else if (saw_typedef
)
4614 warning_at (declspecs
->locations
[ds_typedef
], 0,
4615 "%<typedef%> was ignored in this declaration");
4616 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4617 error_at (declspecs
->locations
[ds_constexpr
],
4618 "%<constexpr%> cannot be used for type declarations");
4621 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4624 if (!CLASS_TYPE_P (declared_type
)
4625 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4626 /* For a non-template class, use the name location. */
4627 loc
= location_of (declared_type
);
4629 /* For a template class (an explicit instantiation), use the
4630 current location. */
4631 loc
= input_location
;
4633 if (explicit_type_instantiation_p
)
4634 /* [dcl.attr.grammar]/4:
4636 No attribute-specifier-seq shall appertain to an explicit
4639 if (warning_at (loc
, OPT_Wattributes
,
4640 "attribute ignored in explicit instantiation %q#T",
4643 "no attribute can be applied to "
4644 "an explicit instantiation");
4647 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4650 return declared_type
;
4653 /* Called when a declaration is seen that contains no names to declare.
4654 If its type is a reference to a structure, union or enum inherited
4655 from a containing scope, shadow that tag name for the current scope
4656 with a forward reference.
4657 If its type defines a new named structure or union
4658 or defines an enum, it is valid but we need not do anything here.
4659 Otherwise, it is an error.
4661 C++: may have to grok the declspecs to learn about static,
4662 complain for anonymous unions.
4664 Returns the TYPE declared -- or NULL_TREE if none. */
4667 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4669 tree t
= check_tag_decl (declspecs
,
4670 /*explicit_type_instantiation_p=*/false);
4675 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4678 /* This is where the variables in an anonymous union are
4679 declared. An anonymous union declaration looks like:
4681 because there is no declarator after the union, the parser
4682 sends that declaration here. */
4683 if (ANON_AGGR_TYPE_P (t
))
4685 fixup_anonymous_aggr (t
);
4687 if (TYPE_FIELDS (t
))
4689 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4690 declspecs
, NORMAL
, 0, NULL
);
4691 finish_anon_union (decl
);
4698 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4701 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4702 const cp_declarator
*declarator
,
4703 bool is_template_arg
)
4707 enum decl_context context
4708 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4709 attrs
= type_specifiers
->attributes
;
4710 type_specifiers
->attributes
= NULL_TREE
;
4711 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4712 if (attrs
&& type
!= error_mark_node
)
4714 if (CLASS_TYPE_P (type
))
4715 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4716 "outside of definition", type
);
4717 else if (MAYBE_CLASS_TYPE_P (type
))
4718 /* A template type parameter or other dependent type. */
4719 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4720 "type %qT without an associated declaration", type
);
4722 cplus_decl_attributes (&type
, attrs
, 0);
4727 /* Process a DECLARATOR for a function-scope variable declaration,
4728 namespace-scope variable declaration, or function declaration.
4729 (Function definitions go through start_function; class member
4730 declarations appearing in the body of the class go through
4731 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4732 If an error occurs, the error_mark_node is returned instead.
4734 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4735 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4736 for an explicitly defaulted function, or SD_DELETED for an explicitly
4737 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4738 implicitly initialized via a default constructor. ATTRIBUTES and
4739 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4741 The scope represented by the context of the returned DECL is pushed
4742 (if it is not the global namespace) and is assigned to
4743 *PUSHED_SCOPE_P. The caller is then responsible for calling
4744 pop_scope on *PUSHED_SCOPE_P if it is set. */
4747 start_decl (const cp_declarator
*declarator
,
4748 cp_decl_specifier_seq
*declspecs
,
4751 tree prefix_attributes
,
4752 tree
*pushed_scope_p
)
4760 *pushed_scope_p
= NULL_TREE
;
4762 /* An object declared as __attribute__((deprecated)) suppresses
4763 warnings of uses of other deprecated items. */
4764 if (lookup_attribute ("deprecated", attributes
))
4765 deprecated_state
= DEPRECATED_SUPPRESS
;
4767 attributes
= chainon (attributes
, prefix_attributes
);
4769 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4772 deprecated_state
= DEPRECATED_NORMAL
;
4774 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4775 || decl
== error_mark_node
)
4776 return error_mark_node
;
4778 context
= CP_DECL_CONTEXT (decl
);
4779 if (context
!= global_namespace
)
4780 *pushed_scope_p
= push_scope (context
);
4782 /* Is it valid for this decl to have an initializer at all?
4783 If not, set INITIALIZED to zero, which will indirectly
4784 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4786 && TREE_CODE (decl
) == TYPE_DECL
)
4788 error ("typedef %qD is initialized (use decltype instead)", decl
);
4789 return error_mark_node
;
4794 if (! toplevel_bindings_p ()
4795 && DECL_EXTERNAL (decl
))
4796 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4798 DECL_EXTERNAL (decl
) = 0;
4799 if (toplevel_bindings_p ())
4800 TREE_STATIC (decl
) = 1;
4802 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4804 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4805 record_key_method_defined (decl
);
4807 /* If this is a typedef that names the class for linkage purposes
4808 (7.1.3p8), apply any attributes directly to the type. */
4809 if (TREE_CODE (decl
) == TYPE_DECL
4810 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4811 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4812 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4816 /* Set attributes here so if duplicate decl, will have proper attributes. */
4817 cplus_decl_attributes (&decl
, attributes
, flags
);
4819 /* Dllimported symbols cannot be defined. Static data members (which
4820 can be initialized in-class and dllimported) go through grokfield,
4821 not here, so we don't need to exclude those decls when checking for
4823 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4825 error ("definition of %q#D is marked %<dllimport%>", decl
);
4826 DECL_DLLIMPORT_P (decl
) = 0;
4829 /* If #pragma weak was used, mark the decl weak now. */
4830 if (!processing_template_decl
)
4831 maybe_apply_pragma_weak (decl
);
4833 if (TREE_CODE (decl
) == FUNCTION_DECL
4834 && DECL_DECLARED_INLINE_P (decl
)
4835 && DECL_UNINLINABLE (decl
)
4836 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4837 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4838 "inline function %qD given attribute noinline", decl
);
4840 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4842 bool this_tmpl
= (processing_template_decl
4843 > template_class_depth (context
));
4846 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4847 if (field
== NULL_TREE
4848 || !(VAR_P (field
) || variable_template_p (field
)))
4849 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4850 else if (variable_template_p (field
) && !this_tmpl
)
4852 if (DECL_LANG_SPECIFIC (decl
)
4853 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4854 /* OK, specialization was already checked. */;
4857 error_at (DECL_SOURCE_LOCATION (decl
),
4858 "non-member-template declaration of %qD", decl
);
4859 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4860 "member template declaration here");
4861 return error_mark_node
;
4866 if (variable_template_p (field
))
4867 field
= DECL_TEMPLATE_RESULT (field
);
4869 if (DECL_CONTEXT (field
) != context
)
4871 if (!same_type_p (DECL_CONTEXT (field
), context
))
4872 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4873 "to be defined as %<%T::%D%>",
4874 DECL_CONTEXT (field
), DECL_NAME (decl
),
4875 context
, DECL_NAME (decl
));
4876 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4878 /* Static data member are tricky; an in-class initialization
4879 still doesn't provide a definition, so the in-class
4880 declaration will have DECL_EXTERNAL set, but will have an
4881 initialization. Thus, duplicate_decls won't warn
4882 about this situation, and so we check here. */
4883 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4884 error ("duplicate initialization of %qD", decl
);
4885 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4887 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4888 && !DECL_DECLARED_CONSTEXPR_P (field
))
4889 error ("%qD declared %<constexpr%> outside its class", field
);
4894 tree field
= check_classfn (context
, decl
,
4896 ? current_template_parms
4898 if (field
&& field
!= error_mark_node
4899 && duplicate_decls (decl
, field
,
4900 /*newdecl_is_friend=*/false))
4904 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4905 DECL_IN_AGGR_P (decl
) = 0;
4906 /* Do not mark DECL as an explicit specialization if it was not
4907 already marked as an instantiation; a declaration should
4908 never be marked as a specialization unless we know what
4909 template is being specialized. */
4910 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4912 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4913 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4914 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4915 && DECL_DECLARED_INLINE_P (decl
));
4917 DECL_COMDAT (decl
) = false;
4919 /* [temp.expl.spec] An explicit specialization of a static data
4920 member of a template is a definition if the declaration
4921 includes an initializer; otherwise, it is a declaration.
4923 We check for processing_specialization so this only applies
4924 to the new specialization syntax. */
4925 if (!initialized
&& processing_specialization
)
4926 DECL_EXTERNAL (decl
) = 1;
4929 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4930 /* Aliases are definitions. */
4932 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4936 was_public
= TREE_PUBLIC (decl
);
4938 /* Enter this declaration into the symbol table. Don't push the plain
4939 VAR_DECL for a variable template. */
4940 if (!template_parm_scope_p ()
4942 decl
= maybe_push_decl (decl
);
4944 if (processing_template_decl
)
4945 decl
= push_template_decl (decl
);
4946 if (decl
== error_mark_node
)
4947 return error_mark_node
;
4950 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4951 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4953 /* This is a const variable with implicit 'static'. Set
4954 DECL_THIS_STATIC so we can tell it from variables that are
4955 !TREE_PUBLIC because of the anonymous namespace. */
4956 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4957 DECL_THIS_STATIC (decl
) = 1;
4960 if (current_function_decl
&& VAR_P (decl
)
4961 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4964 if (CP_DECL_THREAD_LOCAL_P (decl
))
4965 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4967 else if (TREE_STATIC (decl
))
4968 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4972 cp_function_chain
->invalid_constexpr
= true;
4975 if (!processing_template_decl
&& VAR_P (decl
))
4976 start_decl_1 (decl
, initialized
);
4981 /* Process the declaration of a variable DECL. INITIALIZED is true
4982 iff DECL is explicitly initialized. (INITIALIZED is false if the
4983 variable is initialized via an implicitly-called constructor.)
4984 This function must be called for ordinary variables (including, for
4985 example, implicit instantiations of templates), but must not be
4986 called for template declarations. */
4989 start_decl_1 (tree decl
, bool initialized
)
4993 bool aggregate_definition_p
;
4995 gcc_assert (!processing_template_decl
);
4997 if (error_operand_p (decl
))
5000 gcc_assert (VAR_P (decl
));
5002 type
= TREE_TYPE (decl
);
5003 complete_p
= COMPLETE_TYPE_P (type
);
5004 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
5006 /* If an explicit initializer is present, or if this is a definition
5007 of an aggregate, then we need a complete type at this point.
5008 (Scalars are always complete types, so there is nothing to
5009 check.) This code just sets COMPLETE_P; errors (if necessary)
5010 are issued below. */
5011 if ((initialized
|| aggregate_definition_p
)
5013 && COMPLETE_TYPE_P (complete_type (type
)))
5016 /* We will not yet have set TREE_READONLY on DECL if the type
5017 was "const", but incomplete, before this point. But, now, we
5018 have a complete type, so we can try again. */
5019 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
5023 /* Is it valid for this decl to have an initializer at all? */
5025 /* Don't allow initializations for incomplete types except for
5026 arrays which might be completed by the initialization. */
5028 ; /* A complete type is ok. */
5029 else if (type_uses_auto (type
))
5030 ; /* An auto type is ok. */
5031 else if (TREE_CODE (type
) != ARRAY_TYPE
)
5033 error ("variable %q#D has initializer but incomplete type", decl
);
5034 type
= TREE_TYPE (decl
) = error_mark_node
;
5036 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
5038 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
5039 error ("elements of array %q#D have incomplete type", decl
);
5040 /* else we already gave an error in start_decl. */
5043 else if (aggregate_definition_p
&& !complete_p
)
5045 if (type_uses_auto (type
))
5046 error ("declaration of %q#D has no initializer", decl
);
5048 error ("aggregate %q#D has incomplete type and cannot be defined",
5050 /* Change the type so that assemble_variable will give
5051 DECL an rtl we can live with: (mem (const_int 0)). */
5052 type
= TREE_TYPE (decl
) = error_mark_node
;
5055 /* Create a new scope to hold this declaration if necessary.
5056 Whether or not a new scope is necessary cannot be determined
5057 until after the type has been completed; if the type is a
5058 specialization of a class template it is not until after
5059 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
5060 will be set correctly. */
5061 maybe_push_cleanup_level (type
);
5064 /* Handle initialization of references. DECL, TYPE, and INIT have the
5065 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
5066 but will be set to a new CLEANUP_STMT if a temporary is created
5067 that must be destroyed subsequently.
5069 Returns an initializer expression to use to initialize DECL, or
5070 NULL if the initialization can be performed statically.
5072 Quotes on semantics can be found in ARM 8.4.3. */
5075 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
5077 if (init
== NULL_TREE
)
5079 if ((DECL_LANG_SPECIFIC (decl
) == 0
5080 || DECL_IN_AGGR_P (decl
) == 0)
5081 && ! DECL_THIS_EXTERN (decl
))
5082 error ("%qD declared as reference but not initialized", decl
);
5086 if (TREE_CODE (init
) == TREE_LIST
)
5087 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5088 tf_warning_or_error
);
5090 tree ttype
= TREE_TYPE (type
);
5091 if (TREE_CODE (ttype
) != ARRAY_TYPE
5092 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
5093 /* Note: default conversion is only called in very special cases. */
5094 init
= decay_conversion (init
, tf_warning_or_error
);
5096 /* check_initializer handles this for non-reference variables, but for
5097 references we need to do it here or the initializer will get the
5098 incomplete array type and confuse later calls to
5099 cp_complete_array_type. */
5100 if (TREE_CODE (ttype
) == ARRAY_TYPE
5101 && TYPE_DOMAIN (ttype
) == NULL_TREE
5102 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
5103 || TREE_CODE (init
) == STRING_CST
))
5105 cp_complete_array_type (&ttype
, init
, false);
5106 if (ttype
!= TREE_TYPE (type
))
5107 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
5110 /* Convert INIT to the reference type TYPE. This may involve the
5111 creation of a temporary, whose lifetime must be the same as that
5112 of the reference. If so, a DECL_EXPR for the temporary will be
5113 added just after the DECL_EXPR for DECL. That's why we don't set
5114 DECL_INITIAL for local references (instead assigning to them
5115 explicitly); we need to allow the temporary to be initialized
5117 return initialize_reference (type
, init
, flags
,
5118 tf_warning_or_error
);
5121 /* Designated initializers in arrays are not supported in GNU C++.
5122 The parser cannot detect this error since it does not know whether
5123 a given brace-enclosed initializer is for a class type or for an
5124 array. This function checks that CE does not use a designated
5125 initializer. If it does, an error is issued. Returns true if CE
5126 is valid, i.e., does not have a designated initializer. */
5129 check_array_designated_initializer (constructor_elt
*ce
,
5130 unsigned HOST_WIDE_INT index
)
5132 /* Designated initializers for array elements are not supported. */
5135 /* The parser only allows identifiers as designated
5137 if (ce
->index
== error_mark_node
)
5139 error ("name used in a GNU-style designated "
5140 "initializer for an array");
5143 else if (identifier_p (ce
->index
))
5145 error ("name %qD used in a GNU-style designated "
5146 "initializer for an array", ce
->index
);
5150 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5153 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5154 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5157 /* A C99 designator is OK if it matches the current index. */
5158 if (wi::eq_p (ce_index
, index
))
5161 sorry ("non-trivial designated initializers not supported");
5164 error ("C99 designator %qE is not an integral constant-expression",
5173 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5174 array until we finish parsing the initializer. If that's the
5175 situation we're in, update DECL accordingly. */
5178 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5180 tree type
= TREE_TYPE (decl
);
5182 if (TREE_CODE (type
) == ARRAY_TYPE
5183 && TYPE_DOMAIN (type
) == NULL_TREE
5184 && TREE_CODE (decl
) != TYPE_DECL
)
5186 /* do_default is really a C-ism to deal with tentative definitions.
5187 But let's leave it here to ease the eventual merge. */
5188 int do_default
= !DECL_EXTERNAL (decl
);
5189 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5192 /* Check that there are no designated initializers in INIT, as
5193 those are not supported in GNU C++, and as the middle-end
5194 will crash if presented with a non-numeric designated
5196 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5198 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5199 constructor_elt
*ce
;
5201 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5202 if (!check_array_designated_initializer (ce
, i
))
5208 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5212 error ("initializer fails to determine size of %qD", decl
);
5214 else if (failure
== 2)
5218 error ("array size missing in %qD", decl
);
5220 /* If a `static' var's size isn't known, make it extern as
5221 well as static, so it does not get allocated. If it's not
5222 `static', then don't mark it extern; finish_incomplete_decl
5223 will give it a default size and it will get allocated. */
5224 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5225 DECL_EXTERNAL (decl
) = 1;
5227 else if (failure
== 3)
5229 error ("zero-size array %qD", decl
);
5233 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5235 relayout_decl (decl
);
5239 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5240 any appropriate error messages regarding the layout. */
5243 layout_var_decl (tree decl
)
5247 type
= TREE_TYPE (decl
);
5248 if (type
== error_mark_node
)
5251 /* If we haven't already laid out this declaration, do so now.
5252 Note that we must not call complete type for an external object
5253 because it's type might involve templates that we are not
5254 supposed to instantiate yet. (And it's perfectly valid to say
5255 `extern X x' for some incomplete type `X'.) */
5256 if (!DECL_EXTERNAL (decl
))
5257 complete_type (type
);
5258 if (!DECL_SIZE (decl
)
5259 && TREE_TYPE (decl
) != error_mark_node
5260 && (COMPLETE_TYPE_P (type
)
5261 || (TREE_CODE (type
) == ARRAY_TYPE
5262 && !TYPE_DOMAIN (type
)
5263 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5264 layout_decl (decl
, 0);
5266 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5268 /* An automatic variable with an incomplete type: that is an error.
5269 Don't talk about array types here, since we took care of that
5270 message in grokdeclarator. */
5271 error ("storage size of %qD isn%'t known", decl
);
5272 TREE_TYPE (decl
) = error_mark_node
;
5275 /* Keep this code around in case we later want to control debug info
5276 based on whether a type is "used". (jason 1999-11-11) */
5278 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5279 /* Let debugger know it should output info for this type. */
5280 note_debug_info_needed (ttype
);
5282 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5283 note_debug_info_needed (DECL_CONTEXT (decl
));
5286 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5287 && DECL_SIZE (decl
) != NULL_TREE
5288 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5290 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5291 constant_expression_warning (DECL_SIZE (decl
));
5294 error ("storage size of %qD isn%'t constant", decl
);
5295 TREE_TYPE (decl
) = error_mark_node
;
5300 /* If a local static variable is declared in an inline function, or if
5301 we have a weak definition, we must endeavor to create only one
5302 instance of the variable at link-time. */
5305 maybe_commonize_var (tree decl
)
5307 /* Static data in a function with comdat linkage also has comdat
5309 if (TREE_STATIC (decl
)
5310 /* Don't mess with __FUNCTION__. */
5311 && ! DECL_ARTIFICIAL (decl
)
5312 && DECL_FUNCTION_SCOPE_P (decl
)
5313 && vague_linkage_p (DECL_CONTEXT (decl
)))
5317 /* With weak symbols, we simply make the variable COMDAT;
5318 that will cause copies in multiple translations units to
5320 comdat_linkage (decl
);
5324 if (DECL_INITIAL (decl
) == NULL_TREE
5325 || DECL_INITIAL (decl
) == error_mark_node
)
5327 /* Without weak symbols, we can use COMMON to merge
5328 uninitialized variables. */
5329 TREE_PUBLIC (decl
) = 1;
5330 DECL_COMMON (decl
) = 1;
5334 /* While for initialized variables, we must use internal
5335 linkage -- which means that multiple copies will not
5337 TREE_PUBLIC (decl
) = 0;
5338 DECL_COMMON (decl
) = 0;
5339 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5340 "sorry: semantics of inline function static "
5341 "data %q#D are wrong (you%'ll wind up "
5342 "with multiple copies)", decl
))
5343 inform (DECL_SOURCE_LOCATION (decl
),
5344 "you can work around this by removing the initializer");
5350 /* Issue an error message if DECL is an uninitialized const variable. */
5353 check_for_uninitialized_const_var (tree decl
)
5355 tree type
= strip_array_types (TREE_TYPE (decl
));
5357 /* ``Unless explicitly declared extern, a const object does not have
5358 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5361 && TREE_CODE (type
) != REFERENCE_TYPE
5362 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5363 && !DECL_INITIAL (decl
))
5365 tree field
= default_init_uninitialized_part (type
);
5369 if (CP_TYPE_CONST_P (type
))
5370 permerror (DECL_SOURCE_LOCATION (decl
),
5371 "uninitialized const %qD", decl
);
5374 error_at (DECL_SOURCE_LOCATION (decl
),
5375 "uninitialized variable %qD in %<constexpr%> function",
5377 cp_function_chain
->invalid_constexpr
= true;
5380 if (CLASS_TYPE_P (type
))
5382 tree defaulted_ctor
;
5384 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5385 "%q#T has no user-provided default constructor", type
);
5386 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5388 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5389 "constructor is not user-provided because it is "
5390 "explicitly defaulted in the class body");
5391 inform (DECL_SOURCE_LOCATION (field
),
5392 "and the implicitly-defined constructor does not "
5393 "initialize %q#D", field
);
5398 /* Structure holding the current initializer being processed by reshape_init.
5399 CUR is a pointer to the current element being processed, END is a pointer
5400 after the last element present in the initializer. */
5403 constructor_elt
*cur
;
5404 constructor_elt
*end
;
5407 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5409 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5410 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5411 initialized. If there are no more such fields, the return value
5415 next_initializable_field (tree field
)
5418 && (TREE_CODE (field
) != FIELD_DECL
5419 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5420 || DECL_ARTIFICIAL (field
)))
5421 field
= DECL_CHAIN (field
);
5426 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5427 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5428 INTEGER_CST representing the size of the array minus one (the maximum index),
5429 or NULL_TREE if the array was declared without specifying the size. D is
5430 the iterator within the constructor. */
5433 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5434 tsubst_flags_t complain
)
5437 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5438 unsigned HOST_WIDE_INT max_index_cst
= 0;
5439 unsigned HOST_WIDE_INT index
;
5441 /* The initializer for an array is always a CONSTRUCTOR. */
5442 new_init
= build_constructor (init_list_type_node
, NULL
);
5446 /* Minus 1 is used for zero sized arrays. */
5447 if (integer_all_onesp (max_index
))
5450 if (tree_fits_uhwi_p (max_index
))
5451 max_index_cst
= tree_to_uhwi (max_index
);
5452 /* sizetype is sign extended, not zero extended. */
5454 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5457 /* Loop until there are no more initializers. */
5459 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5463 constructor_elt
*old_cur
= d
->cur
;
5465 check_array_designated_initializer (d
->cur
, index
);
5466 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5468 if (elt_init
== error_mark_node
)
5469 return error_mark_node
;
5470 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5471 size_int (index
), elt_init
);
5472 if (!TREE_CONSTANT (elt_init
))
5473 TREE_CONSTANT (new_init
) = false;
5475 /* This can happen with an invalid initializer (c++/54501). */
5476 if (d
->cur
== old_cur
&& !sized_array_p
)
5483 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5484 Parameters are the same of reshape_init_r. */
5487 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5489 tree max_index
= NULL_TREE
;
5491 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5493 if (TYPE_DOMAIN (type
))
5494 max_index
= array_type_nelts (type
);
5496 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5499 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5500 Parameters are the same of reshape_init_r. */
5503 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5505 tree max_index
= NULL_TREE
;
5507 gcc_assert (VECTOR_TYPE_P (type
));
5509 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5511 tree value
= d
->cur
->value
;
5512 if (!same_type_p (TREE_TYPE (value
), type
))
5514 if (complain
& tf_error
)
5515 error ("invalid type %qT as initializer for a vector of type %qT",
5516 TREE_TYPE (d
->cur
->value
), type
);
5517 value
= error_mark_node
;
5523 /* For a vector, we initialize it as an array of the appropriate size. */
5524 if (VECTOR_TYPE_P (type
))
5525 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5527 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5530 /* Subroutine of reshape_init_r, processes the initializers for classes
5531 or union. Parameters are the same of reshape_init_r. */
5534 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5535 tsubst_flags_t complain
)
5540 gcc_assert (CLASS_TYPE_P (type
));
5542 /* The initializer for a class is always a CONSTRUCTOR. */
5543 new_init
= build_constructor (init_list_type_node
, NULL
);
5544 field
= next_initializable_field (TYPE_FIELDS (type
));
5550 An initializer for an aggregate member that is an
5551 empty class shall have the form of an empty
5552 initializer-list {}. */
5553 if (!first_initializer_p
)
5555 if (complain
& tf_error
)
5556 error ("initializer for %qT must be brace-enclosed", type
);
5557 return error_mark_node
;
5562 /* Loop through the initializable fields, gathering initializers. */
5563 while (d
->cur
!= d
->end
)
5566 constructor_elt
*old_cur
= d
->cur
;
5568 /* Handle designated initializers, as an extension. */
5571 if (d
->cur
->index
== error_mark_node
)
5572 return error_mark_node
;
5574 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5575 /* We already reshaped this. */
5576 gcc_assert (d
->cur
->index
== field
);
5577 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5578 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5581 if (complain
& tf_error
)
5582 error ("%<[%E] =%> used in a GNU-style designated initializer"
5583 " for class %qT", d
->cur
->index
, type
);
5584 return error_mark_node
;
5587 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5589 if (complain
& tf_error
)
5590 error ("%qT has no non-static data member named %qD", type
,
5592 return error_mark_node
;
5596 /* If we processed all the member of the class, we are done. */
5600 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5601 /*first_initializer_p=*/false, complain
);
5602 if (field_init
== error_mark_node
)
5603 return error_mark_node
;
5605 if (d
->cur
== old_cur
&& d
->cur
->index
)
5607 /* This can happen with an invalid initializer for a flexible
5608 array member (c++/54441). */
5609 if (complain
& tf_error
)
5610 error ("invalid initializer for %q#D", field
);
5611 return error_mark_node
;
5614 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5618 When a union is initialized with a brace-enclosed
5619 initializer, the braces shall only contain an
5620 initializer for the first member of the union. */
5621 if (TREE_CODE (type
) == UNION_TYPE
)
5624 field
= next_initializable_field (DECL_CHAIN (field
));
5630 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5631 designators are not valid; either complain or return true to indicate
5632 that reshape_init_r should return error_mark_node. */
5635 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5639 if (complain
& tf_error
)
5640 error ("C99 designator %qE outside aggregate initializer",
5648 /* Subroutine of reshape_init, which processes a single initializer (part of
5649 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5650 iterator within the CONSTRUCTOR which points to the initializer to process.
5651 FIRST_INITIALIZER_P is true if this is the first initializer of the
5652 outermost CONSTRUCTOR node. */
5655 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5656 tsubst_flags_t complain
)
5658 tree init
= d
->cur
->value
;
5660 if (error_operand_p (init
))
5661 return error_mark_node
;
5663 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5664 && has_designator_problem (d
, complain
))
5665 return error_mark_node
;
5667 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5669 /* A complex type can be initialized from one or two initializers,
5670 but braces are not elided. */
5672 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5674 if (CONSTRUCTOR_NELTS (init
) > 2)
5676 if (complain
& tf_error
)
5677 error ("too many initializers for %qT", type
);
5679 return error_mark_node
;
5682 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5684 vec
<constructor_elt
, va_gc
> *v
= 0;
5685 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5686 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5687 if (has_designator_problem (d
, complain
))
5688 return error_mark_node
;
5690 init
= build_constructor (init_list_type_node
, v
);
5695 /* A non-aggregate type is always initialized with a single
5697 if (!CP_AGGREGATE_TYPE_P (type
))
5699 /* It is invalid to initialize a non-aggregate type with a
5700 brace-enclosed initializer before C++0x.
5701 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5702 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5703 a CONSTRUCTOR (with a record type). */
5704 if (TREE_CODE (init
) == CONSTRUCTOR
5705 /* Don't complain about a capture-init. */
5706 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5707 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5709 if (SCALAR_TYPE_P (type
))
5711 if (cxx_dialect
< cxx11
5712 /* Isn't value-initialization. */
5713 || CONSTRUCTOR_NELTS (init
) > 0)
5715 if (complain
& tf_error
)
5716 error ("braces around scalar initializer for type %qT",
5718 init
= error_mark_node
;
5722 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5729 /* "If T is a class type and the initializer list has a single element of
5730 type cv U, where U is T or a class derived from T, the object is
5731 initialized from that element." Even if T is an aggregate. */
5732 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5733 && first_initializer_p
5734 && d
->end
- d
->cur
== 1
5735 && reference_related_p (type
, TREE_TYPE (init
)))
5743 All implicit type conversions (clause _conv_) are considered when
5744 initializing the aggregate member with an initializer from an
5745 initializer-list. If the initializer can initialize a member,
5746 the member is initialized. Otherwise, if the member is itself a
5747 non-empty subaggregate, brace elision is assumed and the
5748 initializer is considered for the initialization of the first
5749 member of the subaggregate. */
5750 if (TREE_CODE (init
) != CONSTRUCTOR
5751 /* But don't try this for the first initializer, since that would be
5752 looking through the outermost braces; A a2 = { a1 }; is not a
5753 valid aggregate initialization. */
5754 && !first_initializer_p
5755 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5756 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5763 /* [dcl.init.string]
5765 A char array (whether plain char, signed char, or unsigned char)
5766 can be initialized by a string-literal (optionally enclosed in
5767 braces); a wchar_t array can be initialized by a wide
5768 string-literal (optionally enclosed in braces). */
5769 if (TREE_CODE (type
) == ARRAY_TYPE
5770 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5772 tree str_init
= init
;
5774 /* Strip one level of braces if and only if they enclose a single
5775 element (as allowed by [dcl.init.string]). */
5776 if (!first_initializer_p
5777 && TREE_CODE (str_init
) == CONSTRUCTOR
5778 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5780 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5783 /* If it's a string literal, then it's the initializer for the array
5784 as a whole. Otherwise, continue with normal initialization for
5785 array types (one value per array element). */
5786 if (TREE_CODE (str_init
) == STRING_CST
)
5788 if (has_designator_problem (d
, complain
))
5789 return error_mark_node
;
5795 /* The following cases are about aggregates. If we are not within a full
5796 initializer already, and there is not a CONSTRUCTOR, it means that there
5797 is a missing set of braces (that is, we are processing the case for
5798 which reshape_init exists). */
5799 if (!first_initializer_p
)
5801 if (TREE_CODE (init
) == CONSTRUCTOR
)
5803 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5804 /* There is no need to reshape pointer-to-member function
5805 initializers, as they are always constructed correctly
5806 by the front end. */
5808 else if (COMPOUND_LITERAL_P (init
))
5809 /* For a nested compound literal, there is no need to reshape since
5810 brace elision is not allowed. Even if we decided to allow it,
5811 we should add a call to reshape_init in finish_compound_literal,
5812 before calling digest_init, so changing this code would still
5813 not be necessary. */
5814 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5818 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5819 return reshape_init (type
, init
, complain
);
5823 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5827 /* Dispatch to specialized routines. */
5828 if (CLASS_TYPE_P (type
))
5829 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5830 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5831 return reshape_init_array (type
, d
, complain
);
5832 else if (VECTOR_TYPE_P (type
))
5833 return reshape_init_vector (type
, d
, complain
);
5838 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5839 brace-enclosed aggregate initializer.
5841 INIT is the CONSTRUCTOR containing the list of initializers describing
5842 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5843 It may not presently match the shape of the TYPE; for example:
5845 struct S { int a; int b; };
5846 struct S a[] = { 1, 2, 3, 4 };
5848 Here INIT will hold a vector of four elements, rather than a
5849 vector of two elements, each itself a vector of two elements. This
5850 routine transforms INIT from the former form into the latter. The
5851 revised CONSTRUCTOR node is returned. */
5854 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5856 vec
<constructor_elt
, va_gc
> *v
;
5860 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5862 v
= CONSTRUCTOR_ELTS (init
);
5864 /* An empty constructor does not need reshaping, and it is always a valid
5866 if (vec_safe_is_empty (v
))
5869 /* Recurse on this CONSTRUCTOR. */
5871 d
.end
= d
.cur
+ v
->length ();
5873 new_init
= reshape_init_r (type
, &d
, true, complain
);
5874 if (new_init
== error_mark_node
)
5875 return error_mark_node
;
5877 /* Make sure all the element of the constructor were used. Otherwise,
5878 issue an error about exceeding initializers. */
5881 if (complain
& tf_error
)
5882 error ("too many initializers for %qT", type
);
5884 return error_mark_node
;
5890 /* Verify array initializer. Returns true if errors have been reported. */
5893 check_array_initializer (tree decl
, tree type
, tree init
)
5895 tree element_type
= TREE_TYPE (type
);
5897 /* The array type itself need not be complete, because the
5898 initializer may tell us how many elements are in the array.
5899 But, the elements of the array must be complete. */
5900 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5903 error ("elements of array %q#D have incomplete type", decl
);
5905 error ("elements of array %q#T have incomplete type", type
);
5908 /* A compound literal can't have variable size. */
5910 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5911 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5913 error ("variable-sized compound literal");
5919 /* Subroutine of check_initializer; args are passed down from that function.
5920 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5923 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5926 gcc_assert (stmts_are_full_exprs_p ());
5927 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5930 /* Verify INIT (the initializer for DECL), and record the
5931 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5932 grok_reference_init.
5934 If the return value is non-NULL, it is an expression that must be
5935 evaluated dynamically to initialize DECL. */
5938 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5940 tree type
= TREE_TYPE (decl
);
5941 tree init_code
= NULL
;
5944 /* Things that are going to be initialized need to have complete
5946 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5948 if (DECL_HAS_VALUE_EXPR_P (decl
))
5950 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5951 it doesn't have storage to be initialized. */
5952 gcc_assert (init
== NULL_TREE
);
5956 if (type
== error_mark_node
)
5957 /* We will have already complained. */
5960 if (TREE_CODE (type
) == ARRAY_TYPE
)
5962 if (check_array_initializer (decl
, type
, init
))
5965 else if (!COMPLETE_TYPE_P (type
))
5967 error ("%q#D has incomplete type", decl
);
5968 TREE_TYPE (decl
) = error_mark_node
;
5972 /* There is no way to make a variable-sized class type in GNU C++. */
5973 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5975 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5977 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5978 if (SCALAR_TYPE_P (type
))
5982 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5983 init
= build_zero_init (type
, NULL_TREE
, false);
5985 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5987 error ("scalar object %qD requires one element in initializer",
5989 TREE_TYPE (decl
) = error_mark_node
;
5995 if (TREE_CODE (decl
) == CONST_DECL
)
5997 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5999 DECL_INITIAL (decl
) = init
;
6001 gcc_assert (init
!= NULL_TREE
);
6004 else if (!init
&& DECL_REALLY_EXTERN (decl
))
6006 else if (init
|| type_build_ctor_call (type
)
6007 || TREE_CODE (type
) == REFERENCE_TYPE
)
6009 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6011 init
= grok_reference_init (decl
, type
, init
, flags
);
6012 flags
|= LOOKUP_ALREADY_DIGESTED
;
6015 check_for_uninitialized_const_var (decl
);
6016 /* Do not reshape constructors of vectors (they don't need to be
6018 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
6020 if (is_std_init_list (type
))
6022 init
= perform_implicit_conversion (type
, init
,
6023 tf_warning_or_error
);
6024 flags
|= LOOKUP_ALREADY_DIGESTED
;
6026 else if (TYPE_NON_AGGREGATE_CLASS (type
))
6028 /* Don't reshape if the class has constructors. */
6029 if (cxx_dialect
== cxx98
)
6030 error ("in C++98 %qD must be initialized by constructor, "
6034 else if (VECTOR_TYPE_P (type
) && TYPE_VECTOR_OPAQUE (type
))
6036 error ("opaque vector types cannot be initialized");
6037 init
= error_mark_node
;
6041 init
= reshape_init (type
, init
, tf_warning_or_error
);
6042 flags
|= LOOKUP_NO_NARROWING
;
6045 else if (TREE_CODE (init
) == TREE_LIST
6046 && TREE_TYPE (init
) != unknown_type_node
6047 && !MAYBE_CLASS_TYPE_P (type
))
6049 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6051 /* We get here with code like `int a (2);' */
6052 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6053 tf_warning_or_error
);
6056 /* If DECL has an array type without a specific bound, deduce the
6057 array size from the initializer. */
6058 maybe_deduce_size_from_array_init (decl
, init
);
6059 type
= TREE_TYPE (decl
);
6060 if (type
== error_mark_node
)
6063 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
6064 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
6065 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
6066 && CP_AGGREGATE_TYPE_P (type
)
6067 && (CLASS_TYPE_P (type
)
6068 || !TYPE_NEEDS_CONSTRUCTING (type
)
6069 || type_has_extended_temps (type
))))
6071 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
6073 /* A constructor call is a non-trivial initializer even if
6074 it isn't explicitly written. */
6075 if (TREE_SIDE_EFFECTS (init_code
))
6076 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
6078 /* If this is a constexpr initializer, expand_default_init will
6079 have returned an INIT_EXPR rather than a CALL_EXPR. In that
6080 case, pull the initializer back out and pass it down into
6081 store_init_value. */
6082 while (TREE_CODE (init_code
) == EXPR_STMT
6083 || TREE_CODE (init_code
) == CONVERT_EXPR
)
6084 init_code
= TREE_OPERAND (init_code
, 0);
6085 if (TREE_CODE (init_code
) == INIT_EXPR
)
6087 init
= TREE_OPERAND (init_code
, 1);
6088 init_code
= NULL_TREE
;
6089 /* Don't call digest_init; it's unnecessary and will complain
6090 about aggregate initialization of non-aggregate classes. */
6091 flags
|= LOOKUP_ALREADY_DIGESTED
;
6093 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
6095 /* Declared constexpr, but no suitable initializer; massage
6096 init appropriately so we can pass it into store_init_value
6098 if (CLASS_TYPE_P (type
)
6099 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
6101 init
= build_functional_cast (type
, init
, tf_none
);
6102 if (TREE_CODE (init
) == TARGET_EXPR
)
6103 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
6105 init_code
= NULL_TREE
;
6111 if (init
&& TREE_CODE (init
) != TREE_VEC
)
6113 /* In aggregate initialization of a variable, each element
6114 initialization is a full-expression because there is no
6115 enclosing expression. */
6116 gcc_assert (stmts_are_full_exprs_p ());
6118 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
6120 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
6121 && DECL_INITIAL (decl
)
6122 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
6123 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
6124 warning (0, "array %qD initialized by parenthesized string literal %qE",
6125 decl
, DECL_INITIAL (decl
));
6131 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
6132 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
6133 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
6134 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
6137 check_for_uninitialized_const_var (decl
);
6140 if (init
&& init
!= error_mark_node
)
6141 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
6145 /* We might have set these in cp_finish_decl. */
6146 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
6147 TREE_CONSTANT (decl
) = false;
6150 if (init_code
&& DECL_IN_AGGR_P (decl
))
6152 static int explained
= 0;
6154 if (cxx_dialect
< cxx11
)
6155 error ("initializer invalid for static member with constructor");
6157 error ("non-constant in-class initialization invalid for static "
6158 "member %qD", decl
);
6161 inform (input_location
,
6162 "(an out of class initialization is required)");
6171 /* If DECL is not a local variable, give it RTL. */
6174 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6176 int toplev
= toplevel_bindings_p ();
6179 /* Set the DECL_ASSEMBLER_NAME for the object. */
6182 /* The `register' keyword, when used together with an
6183 asm-specification, indicates that the variable should be
6184 placed in a particular register. */
6185 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6187 set_user_assembler_name (decl
, asmspec
);
6188 DECL_HARD_REGISTER (decl
) = 1;
6192 if (TREE_CODE (decl
) == FUNCTION_DECL
6193 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6194 set_builtin_user_assembler_name (decl
, asmspec
);
6195 set_user_assembler_name (decl
, asmspec
);
6199 /* Handle non-variables up front. */
6202 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6206 /* If we see a class member here, it should be a static data
6208 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6210 gcc_assert (TREE_STATIC (decl
));
6211 /* An in-class declaration of a static data member should be
6212 external; it is only a declaration, and not a definition. */
6213 if (init
== NULL_TREE
)
6214 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6217 /* We don't create any RTL for local variables. */
6218 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6221 /* We defer emission of local statics until the corresponding
6222 DECL_EXPR is expanded. */
6223 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6225 /* Defer template instantiations. */
6226 if (DECL_LANG_SPECIFIC (decl
)
6227 && DECL_IMPLICIT_INSTANTIATION (decl
))
6230 /* If we're not deferring, go ahead and assemble the variable. */
6232 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6235 /* walk_tree helper for wrap_temporary_cleanups, below. */
6238 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6240 /* Stop at types or full-expression boundaries. */
6241 if (TYPE_P (*stmt_p
)
6242 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6248 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6250 tree guard
= (tree
)data
;
6251 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6253 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6254 /* Tell honor_protect_cleanup_actions to handle this as a separate
6256 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6258 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6264 /* We're initializing a local variable which has a cleanup GUARD. If there
6265 are any temporaries used in the initializer INIT of this variable, we
6266 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6267 variable will be cleaned up properly if one of them throws.
6269 Unfortunately, there's no way to express this properly in terms of
6270 nesting, as the regions for the temporaries overlap the region for the
6271 variable itself; if there are two temporaries, the variable needs to be
6272 the first thing destroyed if either of them throws. However, we only
6273 want to run the variable's cleanup if it actually got constructed. So
6274 we need to guard the temporary cleanups with the variable's cleanup if
6275 they are run on the normal path, but not if they are run on the
6276 exceptional path. We implement this by telling
6277 honor_protect_cleanup_actions to strip the variable cleanup from the
6278 exceptional path. */
6281 wrap_temporary_cleanups (tree init
, tree guard
)
6283 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6286 /* Generate code to initialize DECL (a local variable). */
6289 initialize_local_var (tree decl
, tree init
)
6291 tree type
= TREE_TYPE (decl
);
6295 gcc_assert (VAR_P (decl
)
6296 || TREE_CODE (decl
) == RESULT_DECL
);
6297 gcc_assert (!TREE_STATIC (decl
));
6299 if (DECL_SIZE (decl
) == NULL_TREE
)
6301 /* If we used it already as memory, it must stay in memory. */
6302 DECL_INITIAL (decl
) = NULL_TREE
;
6303 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6307 if (type
== error_mark_node
)
6310 /* Compute and store the initial value. */
6311 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6312 if (TREE_USED (type
))
6313 DECL_READ_P (decl
) = 1;
6315 /* Generate a cleanup, if necessary. */
6316 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6318 /* Perform the initialization. */
6321 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6322 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6323 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6325 /* Stick simple initializers in DECL_INITIAL so that
6326 -Wno-init-self works (c++/34772). */
6327 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6328 DECL_INITIAL (decl
) = rinit
;
6330 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6334 warning_at (DECL_SOURCE_LOCATION (decl
),
6336 "reference %qD is initialized with itself", decl
);
6341 int saved_stmts_are_full_exprs_p
;
6343 /* If we're only initializing a single object, guard the
6344 destructors of any temporaries used in its initializer with
6345 its destructor. This isn't right for arrays because each
6346 element initialization is a full-expression. */
6347 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6348 wrap_temporary_cleanups (init
, cleanup
);
6350 gcc_assert (building_stmt_list_p ());
6351 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6352 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6353 finish_expr_stmt (init
);
6354 current_stmt_tree ()->stmts_are_full_exprs_p
=
6355 saved_stmts_are_full_exprs_p
;
6359 /* Set this to 0 so we can tell whether an aggregate which was
6360 initialized was ever used. Don't do this if it has a
6361 destructor, so we don't complain about the 'resource
6362 allocation is initialization' idiom. Now set
6363 attribute((unused)) on types so decls of that type will be
6364 marked used. (see TREE_USED, above.) */
6365 if (TYPE_NEEDS_CONSTRUCTING (type
)
6367 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6368 && DECL_NAME (decl
))
6369 TREE_USED (decl
) = 0;
6370 else if (already_used
)
6371 TREE_USED (decl
) = 1;
6374 finish_decl_cleanup (decl
, cleanup
);
6377 /* DECL is a VAR_DECL for a compiler-generated variable with static
6378 storage duration (like a virtual table) whose initializer is a
6379 compile-time constant. Initialize the variable and provide it to the
6383 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6386 gcc_assert (DECL_ARTIFICIAL (decl
));
6387 init
= build_constructor (TREE_TYPE (decl
), v
);
6388 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6389 DECL_INITIAL (decl
) = init
;
6390 DECL_INITIALIZED_P (decl
) = 1;
6391 determine_visibility (decl
);
6392 layout_var_decl (decl
);
6393 maybe_commonize_var (decl
);
6394 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6397 /* INIT is the initializer for a variable, as represented by the
6398 parser. Returns true iff INIT is type-dependent. */
6401 type_dependent_init_p (tree init
)
6403 if (TREE_CODE (init
) == TREE_LIST
)
6404 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6405 return any_type_dependent_elements_p (init
);
6406 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6407 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6409 vec
<constructor_elt
, va_gc
> *elts
;
6413 elts
= CONSTRUCTOR_ELTS (init
);
6414 nelts
= vec_safe_length (elts
);
6415 for (i
= 0; i
< nelts
; ++i
)
6416 if (type_dependent_init_p ((*elts
)[i
].value
))
6420 /* It must be a simple expression, e.g., int i = 3; */
6421 return type_dependent_expression_p (init
);
6426 /* INIT is the initializer for a variable, as represented by the
6427 parser. Returns true iff INIT is value-dependent. */
6430 value_dependent_init_p (tree init
)
6432 if (TREE_CODE (init
) == TREE_LIST
)
6433 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6434 return any_value_dependent_elements_p (init
);
6435 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6436 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6438 vec
<constructor_elt
, va_gc
> *elts
;
6442 elts
= CONSTRUCTOR_ELTS (init
);
6443 nelts
= vec_safe_length (elts
);
6444 for (i
= 0; i
< nelts
; ++i
)
6445 if (value_dependent_init_p ((*elts
)[i
].value
))
6449 /* It must be a simple expression, e.g., int i = 3; */
6450 return value_dependent_expression_p (init
);
6455 // Returns true if a DECL is VAR_DECL with the concept specifier.
6457 is_concept_var (tree decl
)
6459 return (VAR_P (decl
)
6460 // Not all variables have DECL_LANG_SPECIFIC.
6461 && DECL_LANG_SPECIFIC (decl
)
6462 && DECL_DECLARED_CONCEPT_P (decl
));
6465 /* Finish processing of a declaration;
6466 install its line number and initial value.
6467 If the length of an array type is not known before,
6468 it must be determined now, from the initial value, or it is an error.
6470 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6471 true, then INIT is an integral constant expression.
6473 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6474 if the (init) syntax was used. */
6477 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6478 tree asmspec_tree
, int flags
)
6481 vec
<tree
, va_gc
> *cleanups
= NULL
;
6482 const char *asmspec
= NULL
;
6483 int was_readonly
= 0;
6484 bool var_definition_p
= false;
6487 if (decl
== error_mark_node
)
6492 error ("assignment (not initialization) in declaration");
6496 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6497 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6498 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6500 type
= TREE_TYPE (decl
);
6501 if (type
== error_mark_node
)
6504 /* If a name was specified, get the string. */
6505 if (at_namespace_scope_p ())
6506 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6507 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6508 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6510 if (current_class_type
6511 && CP_DECL_CONTEXT (decl
) == current_class_type
6512 && TYPE_BEING_DEFINED (current_class_type
)
6513 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6514 && (DECL_INITIAL (decl
) || init
))
6515 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6517 if (TREE_CODE (decl
) != FUNCTION_DECL
6518 && (auto_node
= type_uses_auto (type
)))
6521 if (init
== NULL_TREE
)
6523 if (DECL_LANG_SPECIFIC (decl
)
6524 && DECL_TEMPLATE_INSTANTIATION (decl
)
6525 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6527 /* init is null because we're deferring instantiating the
6528 initializer until we need it. Well, we need it now. */
6529 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6533 error ("declaration of %q#D has no initializer", decl
);
6534 TREE_TYPE (decl
) = error_mark_node
;
6538 if (TREE_CODE (d_init
) == TREE_LIST
)
6539 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6540 tf_warning_or_error
);
6541 d_init
= resolve_nondeduced_context (d_init
);
6542 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6544 tf_warning_or_error
,
6546 if (type
== error_mark_node
)
6548 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6551 if (!ensure_literal_type_for_constexpr_object (decl
))
6552 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6555 && DECL_CLASS_SCOPE_P (decl
)
6556 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6557 check_static_variable_definition (decl
, type
);
6559 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6562 if (init
== ridpointers
[(int)RID_DELETE
])
6564 /* FIXME check this is 1st decl. */
6565 DECL_DELETED_FN (decl
) = 1;
6566 DECL_DECLARED_INLINE_P (decl
) = 1;
6567 DECL_INITIAL (decl
) = error_mark_node
;
6568 FOR_EACH_CLONE (clone
, decl
)
6570 DECL_DELETED_FN (clone
) = 1;
6571 DECL_DECLARED_INLINE_P (clone
) = 1;
6572 DECL_INITIAL (clone
) = error_mark_node
;
6576 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6578 if (defaultable_fn_check (decl
))
6579 DECL_DEFAULTED_FN (decl
) = 1;
6581 DECL_INITIAL (decl
) = NULL_TREE
;
6585 if (init
&& VAR_P (decl
))
6587 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6588 /* If DECL is a reference, then we want to know whether init is a
6589 reference constant; init_const_expr_p as passed tells us whether
6590 it's an rvalue constant. */
6591 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6592 init_const_expr_p
= potential_constant_expression (init
);
6593 if (init_const_expr_p
)
6595 /* Set these flags now for templates. We'll update the flags in
6596 store_init_value for instantiations. */
6597 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6598 if (decl_maybe_constant_var_p (decl
))
6599 TREE_CONSTANT (decl
) = 1;
6603 if (processing_template_decl
)
6605 bool type_dependent_p
;
6607 /* Add this declaration to the statement-tree. */
6608 if (at_function_scope_p ())
6609 add_decl_expr (decl
);
6611 type_dependent_p
= dependent_type_p (type
);
6613 if (check_for_bare_parameter_packs (init
))
6616 DECL_INITIAL (decl
) = NULL_TREE
;
6619 /* Generally, initializers in templates are expanded when the
6620 template is instantiated. But, if DECL is a variable constant
6621 then it can be used in future constant expressions, so its value
6622 must be available. */
6624 if (!VAR_P (decl
) || type_dependent_p
)
6625 /* We can't do anything if the decl has dependent type. */;
6627 && init_const_expr_p
6628 && TREE_CODE (type
) != REFERENCE_TYPE
6629 && decl_maybe_constant_var_p (decl
)
6630 && !type_dependent_init_p (init
)
6631 && !value_dependent_init_p (init
))
6633 /* This variable seems to be a non-dependent constant, so process
6634 its initializer. If check_initializer returns non-null the
6635 initialization wasn't constant after all. */
6637 cleanups
= make_tree_vector ();
6638 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6639 if (init_code
== NULL_TREE
)
6641 release_tree_vector (cleanups
);
6643 else if (!init
&& is_concept_var (decl
))
6644 error ("variable concept has no initializer");
6645 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6647 /* Deduce array size even if the initializer is dependent. */
6648 maybe_deduce_size_from_array_init (decl
, init
);
6649 /* And complain about multiple initializers. */
6650 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6651 && !MAYBE_CLASS_TYPE_P (type
))
6652 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6653 tf_warning_or_error
);
6657 DECL_INITIAL (decl
) = init
;
6661 /* Just store non-static data member initializers for later. */
6662 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6663 DECL_INITIAL (decl
) = init
;
6665 /* Take care of TYPE_DECLs up front. */
6666 if (TREE_CODE (decl
) == TYPE_DECL
)
6668 if (type
!= error_mark_node
6669 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6671 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6672 warning (0, "shadowing previous type declaration of %q#D", decl
);
6673 set_identifier_type_value (DECL_NAME (decl
), decl
);
6676 /* If we have installed this as the canonical typedef for this
6677 type, and that type has not been defined yet, delay emitting
6678 the debug information for it, as we will emit it later. */
6679 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6680 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6681 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6683 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6688 /* A reference will be modified here, as it is initialized. */
6689 if (! DECL_EXTERNAL (decl
)
6690 && TREE_READONLY (decl
)
6691 && TREE_CODE (type
) == REFERENCE_TYPE
)
6694 TREE_READONLY (decl
) = 0;
6699 /* If this is a local variable that will need a mangled name,
6700 register it now. We must do this before processing the
6701 initializer for the variable, since the initialization might
6702 require a guard variable, and since the mangled name of the
6703 guard variable will depend on the mangled name of this
6705 if (DECL_FUNCTION_SCOPE_P (decl
)
6706 && TREE_STATIC (decl
)
6707 && !DECL_ARTIFICIAL (decl
))
6709 push_local_name (decl
);
6710 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6711 || DECL_DESTRUCTOR_P (current_function_decl
))
6712 /* Normally local_decls is populated during GIMPLE lowering,
6713 but [cd]tors are never actually compiled directly. We need
6714 to put statics on the list so we can deal with the label
6715 address extension. FIXME. */
6716 add_local_decl (cfun
, decl
);
6717 /* And make sure it's in the symbol table for
6718 c_parse_final_cleanups to find. */
6719 varpool_node::get_create (decl
);
6722 /* Convert the initializer to the type of DECL, if we have not
6723 already initialized DECL. */
6724 if (!DECL_INITIALIZED_P (decl
)
6725 /* If !DECL_EXTERNAL then DECL is being defined. In the
6726 case of a static data member initialized inside the
6727 class-specifier, there can be an initializer even if DECL
6728 is *not* defined. */
6729 && (!DECL_EXTERNAL (decl
) || init
))
6731 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6734 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6735 /* Allow libjava/prims.cc define primitive classes. */
6736 if (init
!= NULL_TREE
6737 || jclass
== NULL_TREE
6738 || TREE_CODE (jclass
) != TYPE_DECL
6739 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6740 || !same_type_ignoring_top_level_qualifiers_p
6741 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6742 error ("Java object %qD not allocated with %<new%>", decl
);
6745 cleanups
= make_tree_vector ();
6746 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6752 The memory occupied by any object of static storage
6753 duration is zero-initialized at program startup before
6754 any other initialization takes place.
6756 We cannot create an appropriate initializer until after
6757 the type of DECL is finalized. If DECL_INITIAL is set,
6758 then the DECL is statically initialized, and any
6759 necessary zero-initialization has already been performed. */
6760 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6761 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6762 /*nelts=*/NULL_TREE
,
6763 /*static_storage_p=*/true);
6764 /* Remember that the initialization for this variable has
6766 DECL_INITIALIZED_P (decl
) = 1;
6767 /* This declaration is the definition of this variable,
6768 unless we are initializing a static data member within
6769 the class specifier. */
6770 if (!DECL_EXTERNAL (decl
))
6771 var_definition_p
= true;
6773 /* If the variable has an array type, lay out the type, even if
6774 there is no initializer. It is valid to index through the
6775 array, and we must get TYPE_ALIGN set correctly on the array
6777 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6780 if (TREE_STATIC (decl
)
6781 && !at_function_scope_p ()
6782 && current_function_decl
== NULL
)
6783 /* So decl is a global variable or a static member of a
6784 non local class. Record the types it uses
6785 so that we can decide later to emit debug info for them. */
6786 record_types_used_by_current_var_decl (decl
);
6788 else if (TREE_CODE (decl
) == FIELD_DECL
6789 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6790 error ("non-static data member %qD has Java class type", decl
);
6792 /* Add this declaration to the statement-tree. This needs to happen
6793 after the call to check_initializer so that the DECL_EXPR for a
6794 reference temp is added before the DECL_EXPR for the reference itself. */
6795 if (DECL_FUNCTION_SCOPE_P (decl
))
6797 /* If we're building a variable sized type, and we might be
6798 reachable other than via the top of the current binding
6799 level, then create a new BIND_EXPR so that we deallocate
6800 the object at the right time. */
6803 && !TREE_CONSTANT (DECL_SIZE (decl
))
6804 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6807 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6808 TREE_SIDE_EFFECTS (bind
) = 1;
6810 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6812 add_decl_expr (decl
);
6815 /* Let the middle end know about variables and functions -- but not
6816 static data members in uninstantiated class templates. */
6817 if (VAR_OR_FUNCTION_DECL_P (decl
))
6821 layout_var_decl (decl
);
6822 maybe_commonize_var (decl
);
6825 /* This needs to happen after the linkage is set. */
6826 determine_visibility (decl
);
6828 if (var_definition_p
&& TREE_STATIC (decl
))
6830 /* If a TREE_READONLY variable needs initialization
6831 at runtime, it is no longer readonly and we need to
6832 avoid MEM_READONLY_P being set on RTL created for it. */
6835 if (TREE_READONLY (decl
))
6836 TREE_READONLY (decl
) = 0;
6839 else if (was_readonly
)
6840 TREE_READONLY (decl
) = 1;
6842 /* Likewise if it needs destruction. */
6843 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6844 TREE_READONLY (decl
) = 0;
6847 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6849 /* Check for abstractness of the type. Notice that there is no
6850 need to strip array types here since the check for those types
6851 is already done within create_array_type_for_decl. */
6852 abstract_virtuals_error (decl
, type
);
6854 if (TREE_TYPE (decl
) == error_mark_node
)
6855 /* No initialization required. */
6857 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6861 if (init
== ridpointers
[(int)RID_DEFAULT
])
6863 /* An out-of-class default definition is defined at
6864 the point where it is explicitly defaulted. */
6865 if (DECL_DELETED_FN (decl
))
6866 maybe_explain_implicit_delete (decl
);
6867 else if (DECL_INITIAL (decl
) == error_mark_node
)
6868 synthesize_method (decl
);
6871 error ("function %q#D is initialized like a variable", decl
);
6873 /* else no initialization required. */
6875 else if (DECL_EXTERNAL (decl
)
6876 && ! (DECL_LANG_SPECIFIC (decl
)
6877 && DECL_NOT_REALLY_EXTERN (decl
)))
6880 DECL_INITIAL (decl
) = init
;
6882 /* A variable definition. */
6883 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6884 /* Initialize the local variable. */
6885 initialize_local_var (decl
, init
);
6887 /* If a variable is defined, and then a subsequent
6888 definition with external linkage is encountered, we will
6889 get here twice for the same variable. We want to avoid
6890 calling expand_static_init more than once. For variables
6891 that are not static data members, we can call
6892 expand_static_init only when we actually process the
6893 initializer. It is not legal to redeclare a static data
6894 member, so this issue does not arise in that case. */
6895 else if (var_definition_p
&& TREE_STATIC (decl
))
6896 expand_static_init (decl
, init
);
6899 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6900 reference, insert it in the statement-tree now. */
6904 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6905 push_cleanup (decl
, t
, false);
6906 release_tree_vector (cleanups
);
6910 TREE_READONLY (decl
) = 1;
6912 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6915 /* Returns a declaration for a VAR_DECL as if:
6917 extern "C" TYPE NAME;
6919 had been seen. Used to create compiler-generated global
6923 declare_global_var (tree name
, tree type
)
6927 push_to_top_level ();
6928 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6929 TREE_PUBLIC (decl
) = 1;
6930 DECL_EXTERNAL (decl
) = 1;
6931 DECL_ARTIFICIAL (decl
) = 1;
6932 /* If the user has explicitly declared this variable (perhaps
6933 because the code we are compiling is part of a low-level runtime
6934 library), then it is possible that our declaration will be merged
6935 with theirs by pushdecl. */
6936 decl
= pushdecl (decl
);
6937 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6938 pop_from_top_level ();
6943 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6944 if "__cxa_atexit" is not being used) corresponding to the function
6945 to be called when the program exits. */
6948 get_atexit_fn_ptr_type (void)
6952 if (!atexit_fn_ptr_type_node
)
6955 if (flag_use_cxa_atexit
6956 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6957 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6958 arg_type
= ptr_type_node
;
6960 /* The parameter to "atexit" is "void (*)(void)". */
6961 arg_type
= NULL_TREE
;
6963 fn_type
= build_function_type_list (void_type_node
,
6964 arg_type
, NULL_TREE
);
6965 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6968 return atexit_fn_ptr_type_node
;
6971 /* Returns a pointer to the `atexit' function. Note that if
6972 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6973 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6976 get_atexit_node (void)
6982 bool use_aeabi_atexit
;
6987 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6989 /* The declaration for `__cxa_atexit' is:
6991 int __cxa_atexit (void (*)(void *), void *, void *)
6993 We build up the argument types and then the function type
6995 tree argtype0
, argtype1
, argtype2
;
6997 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6998 /* First, build the pointer-to-function type for the first
7000 fn_ptr_type
= get_atexit_fn_ptr_type ();
7001 /* Then, build the rest of the argument types. */
7002 argtype2
= ptr_type_node
;
7003 if (use_aeabi_atexit
)
7005 argtype1
= fn_ptr_type
;
7006 argtype0
= ptr_type_node
;
7010 argtype1
= ptr_type_node
;
7011 argtype0
= fn_ptr_type
;
7013 /* And the final __cxa_atexit type. */
7014 fn_type
= build_function_type_list (integer_type_node
,
7015 argtype0
, argtype1
, argtype2
,
7017 if (use_aeabi_atexit
)
7018 name
= "__aeabi_atexit";
7020 name
= "__cxa_atexit";
7024 /* The declaration for `atexit' is:
7026 int atexit (void (*)());
7028 We build up the argument types and then the function type
7030 fn_ptr_type
= get_atexit_fn_ptr_type ();
7031 /* Build the final atexit type. */
7032 fn_type
= build_function_type_list (integer_type_node
,
7033 fn_ptr_type
, NULL_TREE
);
7037 /* Now, build the function declaration. */
7038 push_lang_context (lang_name_c
);
7039 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
7040 mark_used (atexit_fndecl
);
7041 pop_lang_context ();
7042 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
7047 /* Like get_atexit_node, but for thread-local cleanups. */
7050 get_thread_atexit_node (void)
7052 /* The declaration for `__cxa_thread_atexit' is:
7054 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
7055 tree fn_type
= build_function_type_list (integer_type_node
,
7056 get_atexit_fn_ptr_type (),
7057 ptr_type_node
, ptr_type_node
,
7060 /* Now, build the function declaration. */
7061 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
7062 ECF_LEAF
| ECF_NOTHROW
);
7063 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
7066 /* Returns the __dso_handle VAR_DECL. */
7069 get_dso_handle_node (void)
7071 if (dso_handle_node
)
7072 return dso_handle_node
;
7074 /* Declare the variable. */
7075 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
7078 #ifdef HAVE_GAS_HIDDEN
7079 if (dso_handle_node
!= error_mark_node
)
7081 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
7082 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
7086 return dso_handle_node
;
7089 /* Begin a new function with internal linkage whose job will be simply
7090 to destroy some particular variable. */
7092 static GTY(()) int start_cleanup_cnt
;
7095 start_cleanup_fn (void)
7100 bool use_cxa_atexit
= flag_use_cxa_atexit
7101 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
7103 push_to_top_level ();
7105 /* No need to mangle this. */
7106 push_lang_context (lang_name_c
);
7108 /* Build the name of the function. */
7109 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
7110 /* Build the function declaration. */
7111 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
7112 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
7113 /* It's a function with internal linkage, generated by the
7115 TREE_PUBLIC (fndecl
) = 0;
7116 DECL_ARTIFICIAL (fndecl
) = 1;
7117 /* Make the function `inline' so that it is only emitted if it is
7118 actually needed. It is unlikely that it will be inlined, since
7119 it is only called via a function pointer, but we avoid unnecessary
7120 emissions this way. */
7121 DECL_DECLARED_INLINE_P (fndecl
) = 1;
7122 DECL_INTERFACE_KNOWN (fndecl
) = 1;
7123 /* Build the parameter. */
7128 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
7129 DECL_CONTEXT (parmdecl
) = fndecl
;
7130 TREE_USED (parmdecl
) = 1;
7131 DECL_READ_P (parmdecl
) = 1;
7132 DECL_ARGUMENTS (fndecl
) = parmdecl
;
7136 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
7138 pop_lang_context ();
7140 return current_function_decl
;
7143 /* Finish the cleanup function begun by start_cleanup_fn. */
7146 end_cleanup_fn (void)
7148 expand_or_defer_fn (finish_function (0));
7150 pop_from_top_level ();
7153 /* Generate code to handle the destruction of DECL, an object with
7154 static storage duration. */
7157 register_dtor_fn (tree decl
)
7164 bool ob_parm
, dso_parm
, use_dtor
;
7165 tree arg0
, arg1
, arg2
;
7168 type
= TREE_TYPE (decl
);
7169 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7172 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7173 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7174 destructor to "__cxa_atexit"; we don't have to build a temporary
7175 function to do the cleanup. */
7176 dso_parm
= (flag_use_cxa_atexit
7177 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7178 ob_parm
= (CP_DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7179 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7184 /* Find the destructor. */
7185 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7186 gcc_assert (idx
>= 0);
7187 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7188 /* Make sure it is accessible. */
7189 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7190 tf_warning_or_error
);
7194 /* Call build_cleanup before we enter the anonymous function so
7195 that any access checks will be done relative to the current
7196 scope, rather than the scope of the anonymous function. */
7197 build_cleanup (decl
);
7199 /* Now start the function. */
7200 cleanup
= start_cleanup_fn ();
7202 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7203 to the original function, rather than the anonymous one. That
7204 will make the back end think that nested functions are in use,
7205 which causes confusion. */
7206 push_deferring_access_checks (dk_no_check
);
7207 fcall
= build_cleanup (decl
);
7208 pop_deferring_access_checks ();
7210 /* Create the body of the anonymous function. */
7211 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7212 finish_expr_stmt (fcall
);
7213 finish_compound_stmt (compound_stmt
);
7217 /* Call atexit with the cleanup function. */
7218 mark_used (cleanup
);
7219 cleanup
= build_address (cleanup
);
7221 if (CP_DECL_THREAD_LOCAL_P (decl
))
7222 atex_node
= get_thread_atexit_node ();
7224 atex_node
= get_atexit_node ();
7228 /* We must convert CLEANUP to the type that "__cxa_atexit"
7230 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7231 /* "__cxa_atexit" will pass the address of DECL to the
7232 cleanup function. */
7234 addr
= build_address (decl
);
7235 /* The declared type of the parameter to "__cxa_atexit" is
7236 "void *". For plain "T*", we could just let the
7237 machinery in cp_build_function_call convert it -- but if the
7238 type is "cv-qualified T *", then we need to convert it
7239 before passing it in, to avoid spurious errors. */
7240 addr
= build_nop (ptr_type_node
, addr
);
7243 /* Since the cleanup functions we build ignore the address
7244 they're given, there's no reason to pass the actual address
7245 in, and, in general, it's cheaper to pass NULL than any
7247 addr
= null_pointer_node
;
7250 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7251 tf_warning_or_error
);
7253 /* Just pass NULL to the dso handle parm if we don't actually
7254 have a DSO handle on this target. */
7255 arg2
= null_pointer_node
;
7261 if (!CP_DECL_THREAD_LOCAL_P (decl
)
7262 && targetm
.cxx
.use_aeabi_atexit ())
7278 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7279 arg0
, arg1
, arg2
, NULL_TREE
);
7282 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7283 is its initializer. Generate code to handle the construction
7284 and destruction of DECL. */
7287 expand_static_init (tree decl
, tree init
)
7289 gcc_assert (VAR_P (decl
));
7290 gcc_assert (TREE_STATIC (decl
));
7292 /* Some variables require no dynamic initialization. */
7293 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7295 /* Make sure the destructor is callable. */
7296 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7301 if (CP_DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7302 && !DECL_FUNCTION_SCOPE_P (decl
))
7305 error ("non-local variable %qD declared %<__thread%> "
7306 "needs dynamic initialization", decl
);
7308 error ("non-local variable %qD declared %<__thread%> "
7309 "has a non-trivial destructor", decl
);
7310 static bool informed
;
7313 inform (DECL_SOURCE_LOCATION (decl
),
7314 "C++11 %<thread_local%> allows dynamic initialization "
7321 if (DECL_FUNCTION_SCOPE_P (decl
))
7323 /* Emit code to perform this initialization but once. */
7324 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7325 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7326 tree guard
, guard_addr
;
7328 /* We don't need thread-safety code for thread-local vars. */
7329 bool thread_guard
= (flag_threadsafe_statics
7330 && !CP_DECL_THREAD_LOCAL_P (decl
));
7332 /* Emit code to perform this initialization but once. This code
7335 static <type> guard;
7336 if (!__atomic_load (guard.first_byte)) {
7337 if (__cxa_guard_acquire (&guard)) {
7340 // Do initialization.
7341 flag = true; __cxa_guard_release (&guard);
7342 // Register variable for destruction at end of program.
7344 if (!flag) __cxa_guard_abort (&guard);
7348 Note that the `flag' variable is only set to 1 *after* the
7349 initialization is complete. This ensures that an exception,
7350 thrown during the construction, will cause the variable to
7351 reinitialized when we pass through this code again, as per:
7355 If the initialization exits by throwing an exception, the
7356 initialization is not complete, so it will be tried again
7357 the next time control enters the declaration.
7359 This process should be thread-safe, too; multiple threads
7360 should not be able to initialize the variable more than
7363 /* Create the guard variable. */
7364 guard
= get_guard (decl
);
7366 /* Begin the conditional initialization. */
7367 if_stmt
= begin_if_stmt ();
7369 finish_if_stmt_cond (get_guard_cond (guard
, thread_guard
), if_stmt
);
7370 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7374 tree vfntype
= NULL_TREE
;
7375 tree acquire_name
, release_name
, abort_name
;
7376 tree acquire_fn
, release_fn
, abort_fn
;
7377 guard_addr
= build_address (guard
);
7379 acquire_name
= get_identifier ("__cxa_guard_acquire");
7380 release_name
= get_identifier ("__cxa_guard_release");
7381 abort_name
= get_identifier ("__cxa_guard_abort");
7382 acquire_fn
= identifier_global_value (acquire_name
);
7383 release_fn
= identifier_global_value (release_name
);
7384 abort_fn
= identifier_global_value (abort_name
);
7386 acquire_fn
= push_library_fn
7387 (acquire_name
, build_function_type_list (integer_type_node
,
7388 TREE_TYPE (guard_addr
),
7390 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7391 if (!release_fn
|| !abort_fn
)
7392 vfntype
= build_function_type_list (void_type_node
,
7393 TREE_TYPE (guard_addr
),
7396 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7397 ECF_NOTHROW
| ECF_LEAF
);
7399 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7400 ECF_NOTHROW
| ECF_LEAF
);
7402 inner_if_stmt
= begin_if_stmt ();
7403 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7406 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7407 begin
= get_target_expr (boolean_false_node
);
7408 flag
= TARGET_EXPR_SLOT (begin
);
7410 TARGET_EXPR_CLEANUP (begin
)
7411 = build3 (COND_EXPR
, void_type_node
, flag
,
7413 build_call_n (abort_fn
, 1, guard_addr
));
7414 CLEANUP_EH_ONLY (begin
) = 1;
7416 /* Do the initialization itself. */
7417 init
= add_stmt_to_compound (begin
, init
);
7418 init
= add_stmt_to_compound
7419 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7420 init
= add_stmt_to_compound
7421 (init
, build_call_n (release_fn
, 1, guard_addr
));
7424 init
= add_stmt_to_compound (init
, set_guard (guard
));
7426 /* Use atexit to register a function for destroying this static
7428 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7430 finish_expr_stmt (init
);
7434 finish_compound_stmt (inner_then_clause
);
7435 finish_then_clause (inner_if_stmt
);
7436 finish_if_stmt (inner_if_stmt
);
7439 finish_compound_stmt (then_clause
);
7440 finish_then_clause (if_stmt
);
7441 finish_if_stmt (if_stmt
);
7443 else if (CP_DECL_THREAD_LOCAL_P (decl
))
7444 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7446 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7450 /* Make TYPE a complete type based on INITIAL_VALUE.
7451 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7452 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7453 3 if the initializer list is empty (in pedantic mode). */
7456 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7459 tree type
, elt_type
;
7461 /* Don't get confused by a CONSTRUCTOR for some other type. */
7462 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7463 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7468 unsigned HOST_WIDE_INT i
;
7471 /* An array of character type can be initialized from a
7472 brace-enclosed string constant.
7474 FIXME: this code is duplicated from reshape_init. Probably
7475 we should just call reshape_init here? */
7476 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7477 && TREE_CODE (initial_value
) == CONSTRUCTOR
7478 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7480 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7481 tree value
= (*v
)[0].value
;
7483 if (TREE_CODE (value
) == STRING_CST
7484 && v
->length () == 1)
7485 initial_value
= value
;
7488 /* If any of the elements are parameter packs, we can't actually
7489 complete this type now because the array size is dependent. */
7490 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7492 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7495 if (PACK_EXPANSION_P (value
))
7501 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7503 /* We can create the array before the element type is complete, which
7504 means that we didn't have these two bits set in the original type
7505 either. In completing the type, we are expected to propagate these
7506 bits. See also complete_type which does the same thing for arrays
7509 if (TYPE_DOMAIN (type
))
7511 elt_type
= TREE_TYPE (type
);
7512 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7513 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7514 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7520 /* As above, but either give an error or reject zero-size arrays, depending
7524 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7525 bool do_default
, tsubst_flags_t complain
)
7528 bool sfinae
= !(complain
& tf_error
);
7529 /* In SFINAE context we can't be lenient about zero-size arrays. */
7532 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7538 /* Not an error. */;
7539 else if (failure
== 1)
7540 error ("initializer fails to determine size of %qT", *ptype
);
7541 else if (failure
== 2)
7544 error ("array size missing in %qT", *ptype
);
7546 else if (failure
== 3)
7547 error ("zero-size array %qT", *ptype
);
7548 *ptype
= error_mark_node
;
7553 /* Return zero if something is declared to be a member of type
7554 CTYPE when in the context of CUR_TYPE. STRING is the error
7555 message to print in that case. Otherwise, quietly return 1. */
7558 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7560 if (ctype
&& ctype
!= cur_type
)
7562 if (flags
== DTOR_FLAG
)
7563 error ("destructor for alien class %qT cannot be a member", ctype
);
7565 error ("constructor for alien class %qT cannot be a member", ctype
);
7571 /* Subroutine of `grokdeclarator'. */
7573 /* Generate errors possibly applicable for a given set of specifiers.
7574 This is for ARM $7.1.2. */
7577 bad_specifiers (tree object
,
7578 enum bad_spec_place type
,
7589 error ("%qD declared as a %<virtual%> variable", object
);
7591 error ("%qD declared as an %<inline%> variable", object
);
7593 error ("%<const%> and %<volatile%> function specifiers on "
7594 "%qD invalid in variable declaration", object
);
7598 error ("%qD declared as a %<virtual%> parameter", object
);
7600 error ("%qD declared as an %<inline%> parameter", object
);
7602 error ("%<const%> and %<volatile%> function specifiers on "
7603 "%qD invalid in parameter declaration", object
);
7607 error ("%qD declared as a %<virtual%> type", object
);
7609 error ("%qD declared as an %<inline%> type", object
);
7611 error ("%<const%> and %<volatile%> function specifiers on "
7612 "%qD invalid in type declaration", object
);
7616 error ("%qD declared as a %<virtual%> field", object
);
7618 error ("%qD declared as an %<inline%> field", object
);
7620 error ("%<const%> and %<volatile%> function specifiers on "
7621 "%qD invalid in field declaration", object
);
7627 error ("%q+D declared as a friend", object
);
7629 && (TREE_CODE (object
) == TYPE_DECL
7630 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7631 && !TYPE_REFFN_P (TREE_TYPE (object
))
7632 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7633 error ("%q+D declared with an exception specification", object
);
7636 /* DECL is a member function or static data member and is presently
7637 being defined. Check that the definition is taking place in a
7641 check_class_member_definition_namespace (tree decl
)
7643 /* These checks only apply to member functions and static data
7645 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7646 /* We check for problems with specializations in pt.c in
7647 check_specialization_namespace, where we can issue better
7649 if (processing_specialization
)
7651 /* There are no restrictions on the placement of
7652 explicit instantiations. */
7653 if (processing_explicit_instantiation
)
7657 A member function definition that appears outside of the
7658 class definition shall appear in a namespace scope enclosing
7659 the class definition.
7663 The definition for a static data member shall appear in a
7664 namespace scope enclosing the member's class definition. */
7665 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7666 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7667 decl
, DECL_CONTEXT (decl
));
7670 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7671 METHOD_TYPE for a non-static member function; QUALS are the
7672 cv-qualifiers that apply to the function. */
7675 build_this_parm (tree type
, cp_cv_quals quals
)
7680 cp_cv_quals this_quals
;
7682 if (CLASS_TYPE_P (type
))
7685 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7686 this_type
= build_pointer_type (this_type
);
7689 this_type
= type_of_this_parm (type
);
7690 /* The `this' parameter is implicitly `const'; it cannot be
7692 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7693 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7694 parm
= build_artificial_parm (this_identifier
, qual_type
);
7695 cp_apply_type_quals_to_decl (this_quals
, parm
);
7699 /* DECL is a static member function. Complain if it was declared
7700 with function-cv-quals. */
7703 check_static_quals (tree decl
, cp_cv_quals quals
)
7705 if (quals
!= TYPE_UNQUALIFIED
)
7706 error ("static member function %q#D declared with type qualifiers",
7710 // Check that FN takes no arguments and returns bool.
7712 check_concept_fn (tree fn
)
7714 // A constraint is nullary.
7715 if (DECL_ARGUMENTS (fn
))
7716 error ("concept %q#D declared with function parameters", fn
);
7718 // The declared return type of the concept shall be bool, and
7719 // it shall not be deduced from it definition.
7720 tree type
= TREE_TYPE (TREE_TYPE (fn
));
7722 error ("concept %q#D declared with a deduced return type", fn
);
7723 else if (type
!= boolean_type_node
)
7724 error ("concept %q#D with non-%<bool%> return type %qT", fn
, type
);
7727 /* Helper function. Replace the temporary this parameter injected
7728 during cp_finish_omp_declare_simd with the real this parameter. */
7731 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7733 tree this_parm
= (tree
) data
;
7734 if (TREE_CODE (*tp
) == PARM_DECL
7735 && DECL_NAME (*tp
) == this_identifier
7736 && *tp
!= this_parm
)
7738 else if (TYPE_P (*tp
))
7743 /* CTYPE is class type, or null if non-class.
7744 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7746 DECLARATOR is the function's name.
7747 PARMS is a chain of PARM_DECLs for the function.
7748 VIRTUALP is truthvalue of whether the function is virtual or not.
7749 FLAGS are to be passed through to `grokclassfn'.
7750 QUALS are qualifiers indicating whether the function is `const'
7752 RAISES is a list of exceptions that this function can raise.
7753 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7754 not look, and -1 if we should not call `grokclassfn' at all.
7756 SFK is the kind of special function (if any) for the new function.
7758 Returns `NULL_TREE' if something goes wrong, after issuing
7759 applicable error messages. */
7762 grokfndecl (tree ctype
,
7766 tree orig_declarator
,
7769 enum overload_flags flags
,
7771 cp_ref_qualifier rqual
,
7778 special_function_kind sfk
,
7783 location_t location
)
7786 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7789 // Was the concept specifier present?
7790 bool concept_p
= inlinep
& 4;
7792 // Concept declarations must have a corresponding definition.
7793 if (concept_p
&& !funcdef_flag
)
7795 error ("concept %qD has no definition", declarator
);
7800 type
= build_ref_qualified_type (type
, rqual
);
7802 type
= build_exception_variant (type
, raises
);
7804 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7806 /* Set the constraints on the declaration. */
7809 tree tmpl_reqs
= NULL_TREE
;
7810 if (processing_template_decl
> template_class_depth (ctype
))
7811 tmpl_reqs
= TEMPLATE_PARMS_CONSTRAINTS (current_template_parms
);
7813 /* Adjust the required expression into a constraint. */
7815 decl_reqs
= make_predicate_constraint (decl_reqs
);
7817 tree ci
= build_constraints (tmpl_reqs
, decl_reqs
);
7818 set_constraints (decl
, ci
);
7821 /* If we have an explicit location, use it, otherwise use whatever
7822 build_lang_decl used (probably input_location). */
7823 if (location
!= UNKNOWN_LOCATION
)
7824 DECL_SOURCE_LOCATION (decl
) = location
;
7826 if (TREE_CODE (type
) == METHOD_TYPE
)
7829 parm
= build_this_parm (type
, quals
);
7830 DECL_CHAIN (parm
) = parms
;
7833 /* Allocate space to hold the vptr bit if needed. */
7834 DECL_ALIGN (decl
) = MINIMUM_METHOD_BOUNDARY
;
7836 DECL_ARGUMENTS (decl
) = parms
;
7837 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7838 DECL_CONTEXT (t
) = decl
;
7839 /* Propagate volatile out from type to decl. */
7840 if (TYPE_VOLATILE (type
))
7841 TREE_THIS_VOLATILE (decl
) = 1;
7843 /* Setup decl according to sfk. */
7846 case sfk_constructor
:
7847 case sfk_copy_constructor
:
7848 case sfk_move_constructor
:
7849 DECL_CONSTRUCTOR_P (decl
) = 1;
7851 case sfk_destructor
:
7852 DECL_DESTRUCTOR_P (decl
) = 1;
7859 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7863 ("defining explicit specialization %qD in friend declaration",
7867 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7868 tree args
= TREE_OPERAND (orig_declarator
, 1);
7870 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7872 /* Something like `template <class T> friend void f<T>()'. */
7873 error ("invalid use of template-id %qD in declaration "
7874 "of primary template",
7880 /* A friend declaration of the form friend void f<>(). Record
7881 the information in the TEMPLATE_ID_EXPR. */
7882 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7884 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7885 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7887 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7888 if (TREE_PURPOSE (t
)
7889 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7891 error ("default arguments are not allowed in declaration "
7892 "of friend template specialization %qD",
7899 error ("%<inline%> is not allowed in declaration of friend "
7900 "template specialization %qD",
7907 /* If this decl has namespace scope, set that up. */
7909 set_decl_namespace (decl
, in_namespace
, friendp
);
7911 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7913 /* `main' and builtins have implicit 'C' linkage. */
7914 if ((MAIN_NAME_P (declarator
)
7915 || (IDENTIFIER_LENGTH (declarator
) > 10
7916 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7917 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7918 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7919 || (targetcm
.cxx_implicit_extern_c
7920 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7921 && current_lang_name
== lang_name_cplusplus
7922 && ctype
== NULL_TREE
7923 && DECL_FILE_SCOPE_P (decl
))
7924 SET_DECL_LANGUAGE (decl
, lang_c
);
7926 /* Should probably propagate const out from type to decl I bet (mrs). */
7929 DECL_STATIC_FUNCTION_P (decl
) = 1;
7930 DECL_CONTEXT (decl
) = ctype
;
7934 DECL_DELETED_FN (decl
) = 1;
7938 DECL_CONTEXT (decl
) = ctype
;
7940 check_class_member_definition_namespace (decl
);
7943 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7945 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7946 error ("cannot declare %<::main%> to be a template");
7948 error ("cannot declare %<::main%> to be inline");
7950 error ("cannot declare %<::main%> to be constexpr");
7952 error ("cannot declare %<::main%> to be static");
7957 /* Members of anonymous types and local classes have no linkage; make
7958 them internal. If a typedef is made later, this will be changed. */
7959 if (ctype
&& (!TREE_PUBLIC (TYPE_MAIN_DECL (ctype
))
7960 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7963 if (publicp
&& cxx_dialect
== cxx98
)
7965 /* [basic.link]: A name with no linkage (notably, the name of a class
7966 or enumeration declared in a local scope) shall not be used to
7967 declare an entity with linkage.
7969 DR 757 relaxes this restriction for C++0x. */
7970 no_linkage_error (decl
);
7973 TREE_PUBLIC (decl
) = publicp
;
7976 DECL_INTERFACE_KNOWN (decl
) = 1;
7977 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7980 /* If the declaration was declared inline, mark it as such. */
7983 DECL_DECLARED_INLINE_P (decl
) = 1;
7985 DECL_COMDAT (decl
) = 1;
7988 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7990 // If the concept declaration specifier was found, check
7991 // that the declaration satisfies the necessary requirements.
7994 DECL_DECLARED_CONCEPT_P (decl
) = true;
7995 check_concept_fn (decl
);
7998 DECL_EXTERNAL (decl
) = 1;
7999 if (TREE_CODE (type
) == FUNCTION_TYPE
)
8004 ? G_("static member function %qD cannot have cv-qualifier")
8005 : G_("non-member function %qD cannot have cv-qualifier"),
8007 quals
= TYPE_UNQUALIFIED
;
8013 ? G_("static member function %qD cannot have ref-qualifier")
8014 : G_("non-member function %qD cannot have ref-qualifier"),
8016 rqual
= REF_QUAL_NONE
;
8020 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
8021 && !grok_op_properties (decl
, /*complain=*/true))
8023 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
8025 bool long_long_unsigned_p
;
8027 const char *suffix
= NULL
;
8028 /* [over.literal]/6: Literal operators shall not have C linkage. */
8029 if (DECL_LANGUAGE (decl
) == lang_c
)
8031 error ("literal operator with C linkage");
8035 if (DECL_NAMESPACE_SCOPE_P (decl
))
8037 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
8040 error ("%qD has invalid argument list", decl
);
8044 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
8045 if (long_long_unsigned_p
)
8047 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
8048 warning (0, "integer suffix %<%s%>"
8049 " shadowed by implementation", suffix
);
8051 else if (long_double_p
)
8053 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
8054 warning (0, "floating point suffix %<%s%>"
8055 " shadowed by implementation", suffix
);
8060 error ("%qD must be a non-member function", decl
);
8066 /* Make the init_value nonzero so pushdecl knows this is not
8067 tentative. error_mark_node is replaced later with the BLOCK. */
8068 DECL_INITIAL (decl
) = error_mark_node
;
8070 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
8071 TREE_NOTHROW (decl
) = 1;
8073 if (flag_openmp
|| flag_openmp_simd
|| flag_cilkplus
)
8075 /* Adjust "omp declare simd" attributes. */
8076 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
8080 for (attr
= ods
; attr
;
8081 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
8083 if (TREE_CODE (type
) == METHOD_TYPE
)
8084 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
8085 DECL_ARGUMENTS (decl
), NULL
);
8086 if (TREE_VALUE (attr
) != NULL_TREE
)
8088 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
8089 cl
= c_omp_declare_simd_clauses_to_numbers
8090 (DECL_ARGUMENTS (decl
), cl
);
8092 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
8094 TREE_VALUE (attr
) = NULL_TREE
;
8100 /* Caller will do the rest of this. */
8104 if (ctype
!= NULL_TREE
)
8105 grokclassfn (ctype
, decl
, flags
);
8108 if (cxx_dialect
>= cxx11
8109 && DECL_DESTRUCTOR_P (decl
)
8110 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
8111 && !processing_template_decl
)
8112 deduce_noexcept_on_destructor (decl
);
8114 decl
= check_explicit_specialization (orig_declarator
, decl
,
8117 4 * (friendp
!= 0) +
8119 if (decl
== error_mark_node
)
8122 if (DECL_STATIC_FUNCTION_P (decl
))
8123 check_static_quals (decl
, quals
);
8127 cplus_decl_attributes (&decl
, *attrlist
, 0);
8128 *attrlist
= NULL_TREE
;
8131 /* Check main's type after attributes have been applied. */
8132 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
8134 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
8137 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8139 error ("%<::main%> must return %<int%>");
8140 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
8141 TREE_TYPE (decl
) = newtype
;
8144 check_main_parameter_types (decl
);
8147 if (ctype
!= NULL_TREE
8148 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
8151 tree old_decl
= check_classfn (ctype
, decl
,
8152 (processing_template_decl
8153 > template_class_depth (ctype
))
8154 ? current_template_parms
8157 if (old_decl
== error_mark_node
)
8165 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
8166 /* Because grokfndecl is always supposed to return a
8167 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8168 here. We depend on our callers to figure out that its
8169 really a template that's being returned. */
8170 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
8172 if (DECL_STATIC_FUNCTION_P (old_decl
)
8173 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8175 /* Remove the `this' parm added by grokclassfn. */
8176 revert_static_member_fn (decl
);
8177 check_static_quals (decl
, quals
);
8179 if (DECL_ARTIFICIAL (old_decl
))
8181 error ("definition of implicitly-declared %qD", old_decl
);
8184 else if (DECL_DEFAULTED_FN (old_decl
))
8186 error ("definition of explicitly-defaulted %q+D", decl
);
8187 error ("%q+#D explicitly defaulted here", old_decl
);
8191 /* Since we've smashed OLD_DECL to its
8192 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8193 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8194 decl
= DECL_TEMPLATE_RESULT (decl
);
8196 /* Attempt to merge the declarations. This can fail, in
8197 the case of some invalid specialization declarations. */
8198 pushed_scope
= push_scope (ctype
);
8199 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8201 pop_scope (pushed_scope
);
8204 error ("no %q#D member function declared in class %qT",
8208 if (ok
== error_mark_node
)
8214 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8217 if (ctype
== NULL_TREE
|| check
)
8221 DECL_VIRTUAL_P (decl
) = 1;
8226 /* decl is a FUNCTION_DECL.
8227 specifiers are the parsed virt-specifiers.
8229 Set flags to reflect the virt-specifiers.
8234 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8236 if (decl
== NULL_TREE
)
8238 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8239 DECL_OVERRIDE_P (decl
) = 1;
8240 if (specifiers
& VIRT_SPEC_FINAL
)
8241 DECL_FINAL_P (decl
) = 1;
8245 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8246 the linkage that DECL will receive in the object file. */
8249 set_linkage_for_static_data_member (tree decl
)
8251 /* A static data member always has static storage duration and
8252 external linkage. Note that static data members are forbidden in
8253 local classes -- the only situation in which a class has
8254 non-external linkage. */
8255 TREE_PUBLIC (decl
) = 1;
8256 TREE_STATIC (decl
) = 1;
8257 /* For non-template classes, static data members are always put
8258 out in exactly those files where they are defined, just as
8259 with ordinary namespace-scope variables. */
8260 if (!processing_template_decl
)
8261 DECL_INTERFACE_KNOWN (decl
) = 1;
8264 /* Create a VAR_DECL named NAME with the indicated TYPE.
8266 If SCOPE is non-NULL, it is the class type or namespace containing
8267 the variable. If SCOPE is NULL, the variable should is created in
8268 the innermost enclosing scope. */
8271 grokvardecl (tree type
,
8273 tree orig_declarator
,
8274 const cp_decl_specifier_seq
*declspecs
,
8281 tree explicit_scope
;
8283 gcc_assert (!name
|| identifier_p (name
));
8285 bool constp
= flags
&1;
8286 bool conceptp
= flags
&2;
8288 /* Compute the scope in which to place the variable, but remember
8289 whether or not that scope was explicitly specified by the user. */
8290 explicit_scope
= scope
;
8293 /* An explicit "extern" specifier indicates a namespace-scope
8295 if (declspecs
->storage_class
== sc_extern
)
8296 scope
= current_decl_namespace ();
8297 else if (!at_function_scope_p ())
8298 scope
= current_scope ();
8302 && (/* If the variable is a namespace-scope variable declared in a
8303 template, we need DECL_LANG_SPECIFIC. */
8304 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8305 /* Similarly for namespace-scope variables with language linkage
8307 || (TREE_CODE (scope
) == NAMESPACE_DECL
8308 && current_lang_name
!= lang_name_cplusplus
)
8309 /* Similarly for static data members. */
8311 /* Similarly for explicit specializations. */
8313 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8314 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8316 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8318 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8319 set_decl_namespace (decl
, explicit_scope
, 0);
8321 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8323 if (declspecs
->storage_class
== sc_extern
)
8325 DECL_THIS_EXTERN (decl
) = 1;
8326 DECL_EXTERNAL (decl
) = !initialized
;
8329 if (DECL_CLASS_SCOPE_P (decl
))
8331 set_linkage_for_static_data_member (decl
);
8332 /* This function is only called with out-of-class definitions. */
8333 DECL_EXTERNAL (decl
) = 0;
8334 check_class_member_definition_namespace (decl
);
8336 /* At top level, either `static' or no s.c. makes a definition
8337 (perhaps tentative), and absence of `static' makes it public. */
8338 else if (toplevel_bindings_p ())
8340 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8341 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8342 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8344 /* Not at top level, only `static' makes a static definition. */
8347 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8348 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8351 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8353 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8355 CP_DECL_THREAD_LOCAL_P (decl
) = true;
8356 if (!processing_template_decl
)
8357 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8359 if (declspecs
->gnu_thread_keyword_p
)
8360 SET_DECL_GNU_TLS_P (decl
);
8363 /* If the type of the decl has no linkage, make sure that we'll
8364 notice that in mark_used. */
8365 if (cxx_dialect
> cxx98
8366 && decl_linkage (decl
) != lk_none
8367 && DECL_LANG_SPECIFIC (decl
) == NULL
8368 && !DECL_EXTERN_C_P (decl
)
8369 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8370 retrofit_lang_decl (decl
);
8372 if (TREE_PUBLIC (decl
))
8374 /* [basic.link]: A name with no linkage (notably, the name of a class
8375 or enumeration declared in a local scope) shall not be used to
8376 declare an entity with linkage.
8378 DR 757 relaxes this restriction for C++0x. */
8379 if (cxx_dialect
< cxx11
)
8380 no_linkage_error (decl
);
8383 DECL_INTERFACE_KNOWN (decl
) = 1;
8385 if (DECL_NAME (decl
)
8386 && MAIN_NAME_P (DECL_NAME (decl
))
8387 && scope
== global_namespace
)
8388 error ("cannot declare %<::main%> to be a global variable");
8390 /* Check that the variable can be safely declared as a concept.
8391 Note that this also forbids explicit specializations. */
8394 if (!processing_template_decl
)
8396 error ("a non-template variable cannot be %<concept%>");
8400 DECL_DECLARED_CONCEPT_P (decl
) = true;
8401 if (!same_type_ignoring_top_level_qualifiers_p (type
, boolean_type_node
))
8402 error_at (declspecs
->locations
[ds_type_spec
],
8403 "concept must have type %<bool%>");
8405 else if (flag_concepts
8406 && processing_template_decl
> template_class_depth (scope
))
8408 tree reqs
= TEMPLATE_PARMS_CONSTRAINTS (current_template_parms
);
8409 tree ci
= build_constraints (reqs
, NULL_TREE
);
8410 set_constraints (decl
, ci
);
8413 // Handle explicit specializations and instantiations of variable templates.
8414 if (orig_declarator
)
8415 decl
= check_explicit_specialization (orig_declarator
, decl
,
8416 template_count
, conceptp
* 8);
8418 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8421 /* Create and return a canonical pointer to member function type, for
8422 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8425 build_ptrmemfunc_type (tree type
)
8430 if (type
== error_mark_node
)
8433 /* Make sure that we always have the unqualified pointer-to-member
8435 if (cp_cv_quals quals
= cp_type_quals (type
))
8437 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8438 return cp_build_qualified_type (unqual
, quals
);
8441 /* If a canonical type already exists for this type, use it. We use
8442 this method instead of type_hash_canon, because it only does a
8443 simple equality check on the list of field members. */
8445 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8448 t
= make_node (RECORD_TYPE
);
8450 /* Let the front end know this is a pointer to member function. */
8451 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8453 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8456 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8458 DECL_CHAIN (field
) = fields
;
8461 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8463 /* Zap out the name so that the back end will give us the debugging
8464 information for this anonymous RECORD_TYPE. */
8465 TYPE_NAME (t
) = NULL_TREE
;
8467 /* Cache this pointer-to-member type so that we can find it again
8469 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8471 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8472 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8473 else if (TYPE_CANONICAL (type
) != type
)
8474 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8479 /* Create and return a pointer to data member type. */
8482 build_ptrmem_type (tree class_type
, tree member_type
)
8484 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8486 cp_cv_quals quals
= type_memfn_quals (member_type
);
8487 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8488 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8489 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8493 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8494 return build_offset_type (class_type
, member_type
);
8498 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8499 Check to see that the definition is valid. Issue appropriate error
8500 messages. Return 1 if the definition is particularly bad, or 0
8504 check_static_variable_definition (tree decl
, tree type
)
8506 /* Can't check yet if we don't know the type. */
8507 if (dependent_type_p (type
))
8509 /* If DECL is declared constexpr, we'll do the appropriate checks
8510 in check_initializer. */
8511 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8513 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8515 if (!COMPLETE_TYPE_P (type
))
8516 error ("in-class initialization of static data member %q#D of "
8517 "incomplete type", decl
);
8518 else if (literal_type_p (type
))
8519 permerror (input_location
,
8520 "%<constexpr%> needed for in-class initialization of "
8521 "static data member %q#D of non-integral type", decl
);
8523 error ("in-class initialization of static data member %q#D of "
8524 "non-literal type", decl
);
8528 /* Motion 10 at San Diego: If a static const integral data member is
8529 initialized with an integral constant expression, the initializer
8530 may appear either in the declaration (within the class), or in
8531 the definition, but not both. If it appears in the class, the
8532 member is a member constant. The file-scope definition is always
8534 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8536 error ("invalid in-class initialization of static data member "
8537 "of non-integral type %qT",
8541 else if (!CP_TYPE_CONST_P (type
))
8542 error ("ISO C++ forbids in-class initialization of non-const "
8543 "static member %qD",
8545 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8546 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8547 "%qD of non-integral type %qT", decl
, type
);
8552 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8553 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8554 expressions out into temporary variables so that walk_tree doesn't
8555 step into them (c++/15764). */
8558 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8560 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8561 tree expr
= *expr_p
;
8562 if (TREE_CODE (expr
) == SAVE_EXPR
)
8564 tree op
= TREE_OPERAND (expr
, 0);
8565 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8566 if (TREE_SIDE_EFFECTS (op
))
8567 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8570 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8575 /* Entry point for the above. */
8578 stabilize_vla_size (tree size
)
8580 hash_set
<tree
> pset
;
8581 /* Break out any function calls into temporary variables. */
8582 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8585 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8586 not inside of SAVE_EXPR and fold them. */
8589 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8591 tree expr
= *expr_p
;
8592 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8594 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8596 *(bool *)data
= true;
8597 if (SIZEOF_EXPR_TYPE_P (expr
))
8598 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8599 SIZEOF_EXPR
, false);
8600 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8601 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8604 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8606 if (expr
== error_mark_node
)
8607 expr
= size_one_node
;
8614 /* Given the SIZE (i.e., number of elements) in an array, compute an
8615 appropriate index type for the array. If non-NULL, NAME is the
8616 name of the thing being declared. */
8619 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8624 if (error_operand_p (size
))
8625 return error_mark_node
;
8627 if (!type_dependent_expression_p (size
))
8629 tree type
= TREE_TYPE (size
);
8631 mark_rvalue_use (size
);
8633 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8634 && TREE_SIDE_EFFECTS (size
))
8635 /* In C++98, we mark a non-constant array bound with a magic
8636 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8639 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8641 if (CLASS_TYPE_P (type
)
8642 && CLASSTYPE_LITERAL_P (type
))
8644 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8647 if (!(complain
& tf_error
))
8648 return error_mark_node
;
8650 error ("size of array %qD has non-integral type %qT",
8653 error ("size of array has non-integral type %qT", type
);
8654 size
= integer_one_node
;
8656 if (size
== error_mark_node
)
8657 return error_mark_node
;
8658 type
= TREE_TYPE (size
);
8661 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8662 size
= maybe_constant_value (size
);
8664 if (!TREE_CONSTANT (size
))
8668 if (error_operand_p (size
))
8669 return error_mark_node
;
8671 /* The array bound must be an integer type. */
8672 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8674 if (!(complain
& tf_error
))
8675 return error_mark_node
;
8677 error ("size of array %qD has non-integral type %qT", name
, type
);
8679 error ("size of array has non-integral type %qT", type
);
8680 size
= integer_one_node
;
8681 type
= TREE_TYPE (size
);
8685 /* A type is dependent if it is...an array type constructed from any
8686 dependent type or whose size is specified by a constant expression
8687 that is value-dependent. */
8688 /* We can only call value_dependent_expression_p on integral constant
8689 expressions; treat non-constant expressions as dependent, too. */
8690 if (processing_template_decl
8691 && (type_dependent_expression_p (size
)
8692 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8694 /* We cannot do any checking for a SIZE that isn't known to be
8695 constant. Just build the index type and mark that it requires
8696 structural equality checks. */
8697 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8698 size
, size_one_node
));
8699 TYPE_DEPENDENT_P (itype
) = 1;
8700 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8701 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8705 /* Normally, the array-bound will be a constant. */
8706 if (TREE_CODE (size
) == INTEGER_CST
)
8708 /* Check to see if the array bound overflowed. Make that an
8709 error, no matter how generous we're being. */
8710 constant_expression_error (size
);
8712 /* An array must have a positive number of elements. */
8713 if (tree_int_cst_lt (size
, integer_zero_node
))
8715 if (!(complain
& tf_error
))
8716 return error_mark_node
;
8718 error ("size of array %qD is negative", name
);
8720 error ("size of array is negative");
8721 size
= integer_one_node
;
8723 /* As an extension we allow zero-sized arrays. */
8724 else if (integer_zerop (size
))
8726 if (!(complain
& tf_error
))
8727 /* We must fail if performing argument deduction (as
8728 indicated by the state of complain), so that
8729 another substitution can be found. */
8730 return error_mark_node
;
8731 else if (in_system_header_at (input_location
))
8732 /* Allow them in system headers because glibc uses them. */;
8734 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8736 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8739 else if (TREE_CONSTANT (size
)
8740 /* We don't allow VLAs at non-function scopes, or during
8741 tentative template substitution. */
8742 || !at_function_scope_p ()
8743 || !(complain
& tf_error
))
8745 if (!(complain
& tf_error
))
8746 return error_mark_node
;
8747 /* `(int) &fn' is not a valid array bound. */
8749 error ("size of array %qD is not an integral constant-expression",
8752 error ("size of array is not an integral constant-expression");
8753 size
= integer_one_node
;
8755 else if (pedantic
&& warn_vla
!= 0)
8758 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8760 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8762 else if (warn_vla
> 0)
8766 "variable length array %qD is used", name
);
8769 "variable length array is used");
8772 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8773 /* A variable sized array. */
8774 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8777 HOST_WIDE_INT saved_processing_template_decl
;
8779 /* Compute the index of the largest element in the array. It is
8780 one less than the number of elements in the array. We save
8781 and restore PROCESSING_TEMPLATE_DECL so that computations in
8782 cp_build_binary_op will be appropriately folded. */
8783 saved_processing_template_decl
= processing_template_decl
;
8784 processing_template_decl
= 0;
8785 itype
= cp_build_binary_op (input_location
,
8787 cp_convert (ssizetype
, size
, complain
),
8788 cp_convert (ssizetype
, integer_one_node
,
8791 itype
= fold (itype
);
8792 processing_template_decl
= saved_processing_template_decl
;
8794 if (!TREE_CONSTANT (itype
))
8796 /* A variable sized array. */
8797 itype
= variable_size (itype
);
8799 if (TREE_CODE (itype
) != SAVE_EXPR
)
8801 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8802 they might survive till gimplification. */
8803 tree newitype
= itype
;
8805 cp_walk_tree_without_duplicates (&newitype
,
8806 fold_sizeof_expr_r
, &found
);
8808 itype
= variable_size (fold (newitype
));
8811 stabilize_vla_size (itype
);
8813 if (flag_sanitize
& SANITIZE_VLA
8814 && do_ubsan_in_current_function ())
8816 /* We have to add 1 -- in the ubsan routine we generate
8817 LE_EXPR rather than LT_EXPR. */
8818 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8819 build_one_cst (TREE_TYPE (itype
)));
8820 t
= ubsan_instrument_vla (input_location
, t
);
8821 finish_expr_stmt (t
);
8824 /* Make sure that there was no overflow when creating to a signed
8825 index type. (For example, on a 32-bit machine, an array with
8826 size 2^32 - 1 is too big.) */
8827 else if (TREE_CODE (itype
) == INTEGER_CST
8828 && TREE_OVERFLOW (itype
))
8830 if (!(complain
& tf_error
))
8831 return error_mark_node
;
8832 error ("overflow in array dimension");
8833 TREE_OVERFLOW (itype
) = 0;
8837 /* Create and return the appropriate index type. */
8838 itype
= build_index_type (itype
);
8840 /* If the index type were dependent, we would have returned early, so
8841 remember that it isn't. */
8842 TYPE_DEPENDENT_P (itype
) = 0;
8843 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8847 /* Returns the scope (if any) in which the entity declared by
8848 DECLARATOR will be located. If the entity was declared with an
8849 unqualified name, NULL_TREE is returned. */
8852 get_scope_of_declarator (const cp_declarator
*declarator
)
8854 while (declarator
&& declarator
->kind
!= cdk_id
)
8855 declarator
= declarator
->declarator
;
8857 /* If the declarator-id is a SCOPE_REF, the scope in which the
8858 declaration occurs is the first operand. */
8860 && declarator
->u
.id
.qualifying_scope
)
8861 return declarator
->u
.id
.qualifying_scope
;
8863 /* Otherwise, the declarator is not a qualified name; the entity will
8864 be declared in the current scope. */
8868 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8869 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8873 create_array_type_for_decl (tree name
, tree type
, tree size
)
8875 tree itype
= NULL_TREE
;
8877 /* If things have already gone awry, bail now. */
8878 if (type
== error_mark_node
|| size
== error_mark_node
)
8879 return error_mark_node
;
8881 /* 8.3.4/1: If the type of the identifier of D contains the auto
8882 type-specifier, the program is ill-formed. */
8883 if (type_uses_auto (type
))
8885 error ("%qD declared as array of %qT", name
, type
);
8886 return error_mark_node
;
8889 /* If there are some types which cannot be array elements,
8890 issue an error-message and return. */
8891 switch (TREE_CODE (type
))
8895 error ("declaration of %qD as array of void", name
);
8897 error ("creating array of void");
8898 return error_mark_node
;
8902 error ("declaration of %qD as array of functions", name
);
8904 error ("creating array of functions");
8905 return error_mark_node
;
8907 case REFERENCE_TYPE
:
8909 error ("declaration of %qD as array of references", name
);
8911 error ("creating array of references");
8912 return error_mark_node
;
8916 error ("declaration of %qD as array of function members", name
);
8918 error ("creating array of function members");
8919 return error_mark_node
;
8927 The constant expressions that specify the bounds of the arrays
8928 can be omitted only for the first member of the sequence. */
8929 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8932 error ("declaration of %qD as multidimensional array must "
8933 "have bounds for all dimensions except the first",
8936 error ("multidimensional array must have bounds for all "
8937 "dimensions except the first");
8939 return error_mark_node
;
8942 /* Figure out the index type for the array. */
8944 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8947 T is called the array element type; this type shall not be [...] an
8948 abstract class type. */
8949 abstract_virtuals_error (name
, type
);
8951 return build_cplus_array_type (type
, itype
);
8954 /* Returns the smallest location != UNKNOWN_LOCATION among the
8955 three stored in LOCATIONS[ds_const], LOCATIONS[ds_volatile],
8956 and LOCATIONS[ds_restrict]. */
8959 smallest_type_quals_location (int type_quals
, const location_t
* locations
)
8961 location_t loc
= UNKNOWN_LOCATION
;
8963 if (type_quals
& TYPE_QUAL_CONST
)
8964 loc
= locations
[ds_const
];
8966 if ((type_quals
& TYPE_QUAL_VOLATILE
)
8967 && (loc
== UNKNOWN_LOCATION
|| locations
[ds_volatile
] < loc
))
8968 loc
= locations
[ds_volatile
];
8970 if ((type_quals
& TYPE_QUAL_RESTRICT
)
8971 && (loc
== UNKNOWN_LOCATION
|| locations
[ds_restrict
] < loc
))
8972 loc
= locations
[ds_restrict
];
8977 /* Check that it's OK to declare a function with the indicated TYPE
8978 and TYPE_QUALS. SFK indicates the kind of special function (if any)
8979 that this function is. OPTYPE is the type given in a conversion
8980 operator declaration, or the class type for a constructor/destructor.
8981 Returns the actual return type of the function; that may be different
8982 than TYPE if an error occurs, or for certain special functions. */
8985 check_special_function_return_type (special_function_kind sfk
,
8989 const location_t
* locations
)
8993 case sfk_constructor
:
8995 error ("return type specification for constructor invalid");
8996 else if (type_quals
!= TYPE_UNQUALIFIED
)
8997 error_at (smallest_type_quals_location (type_quals
, locations
),
8998 "qualifiers are not allowed on constructor declaration");
9000 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
9001 type
= build_pointer_type (optype
);
9003 type
= void_type_node
;
9006 case sfk_destructor
:
9008 error ("return type specification for destructor invalid");
9009 else if (type_quals
!= TYPE_UNQUALIFIED
)
9010 error_at (smallest_type_quals_location (type_quals
, locations
),
9011 "qualifiers are not allowed on destructor declaration");
9013 /* We can't use the proper return type here because we run into
9014 problems with ambiguous bases and covariant returns.
9015 Java classes are left unchanged because (void *) isn't a valid
9016 Java type, and we don't want to change the Java ABI. */
9017 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
9018 type
= build_pointer_type (void_type_node
);
9020 type
= void_type_node
;
9023 case sfk_conversion
:
9025 error ("return type specified for %<operator %T%>", optype
);
9026 else if (type_quals
!= TYPE_UNQUALIFIED
)
9027 error_at (smallest_type_quals_location (type_quals
, locations
),
9028 "qualifiers are not allowed on declaration of "
9029 "%<operator %T%>", optype
);
9041 /* A variable or data member (whose unqualified name is IDENTIFIER)
9042 has been declared with the indicated TYPE. If the TYPE is not
9043 acceptable, issue an error message and return a type to use for
9044 error-recovery purposes. */
9047 check_var_type (tree identifier
, tree type
)
9049 if (VOID_TYPE_P (type
))
9052 error ("unnamed variable or field declared void");
9053 else if (identifier_p (identifier
))
9055 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
9056 error ("variable or field %qE declared void", identifier
);
9059 error ("variable or field declared void");
9060 type
= error_mark_node
;
9066 /* Given declspecs and a declarator (abstract or otherwise), determine
9067 the name and type of the object declared and construct a DECL node
9070 DECLSPECS points to the representation of declaration-specifier
9071 sequence that precedes declarator.
9073 DECL_CONTEXT says which syntactic context this declaration is in:
9074 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
9075 FUNCDEF for a function definition. Like NORMAL but a few different
9076 error messages in each case. Return value may be zero meaning
9077 this definition is too screwy to try to parse.
9078 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
9079 handle member functions (which have FIELD context).
9080 Return value may be zero meaning this definition is too screwy to
9082 PARM for a parameter declaration (either within a function prototype
9083 or before a function body). Make a PARM_DECL, or return void_type_node.
9084 TPARM for a template parameter declaration.
9085 CATCHPARM for a parameter declaration before a catch clause.
9086 TYPENAME if for a typename (in a cast or sizeof).
9087 Don't make a DECL node; just return the ..._TYPE node.
9088 FIELD for a struct or union field; make a FIELD_DECL.
9089 BITFIELD for a field with specified width.
9091 INITIALIZED is as for start_decl.
9093 ATTRLIST is a pointer to the list of attributes, which may be NULL
9094 if there are none; *ATTRLIST may be modified if attributes from inside
9095 the declarator should be applied to the declaration.
9097 When this function is called, scoping variables (such as
9098 CURRENT_CLASS_TYPE) should reflect the scope in which the
9099 declaration occurs, not the scope in which the new declaration will
9100 be placed. For example, on:
9104 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
9107 Returns a DECL (if a declarator is present), a TYPE (if there is no
9108 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
9112 grokdeclarator (const cp_declarator
*declarator
,
9113 cp_decl_specifier_seq
*declspecs
,
9114 enum decl_context decl_context
,
9118 tree type
= NULL_TREE
;
9120 int explicit_intN
= 0;
9121 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
9122 int explicit_int
= 0;
9123 int explicit_char
= 0;
9124 int defaulted_int
= 0;
9126 tree typedef_decl
= NULL_TREE
;
9127 const char *name
= NULL
;
9128 tree typedef_type
= NULL_TREE
;
9129 /* True if this declarator is a function definition. */
9130 bool funcdef_flag
= false;
9131 cp_declarator_kind innermost_code
= cdk_error
;
9134 /* See the code below that used this. */
9135 tree decl_attr
= NULL_TREE
;
9138 /* Keep track of what sort of function is being processed
9139 so that we can warn about default return values, or explicit
9140 return values which do not match prescribed defaults. */
9141 special_function_kind sfk
= sfk_none
;
9143 tree dname
= NULL_TREE
;
9144 tree ctor_return_type
= NULL_TREE
;
9145 enum overload_flags flags
= NO_SPECIAL
;
9146 /* cv-qualifiers that apply to the declarator, for a declaration of
9147 a member function. */
9148 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
9149 /* virt-specifiers that apply to the declarator, for a declaration of
9150 a member function. */
9151 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
9152 /* ref-qualifier that applies to the declarator, for a declaration of
9153 a member function. */
9154 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
9155 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
9156 int type_quals
= TYPE_UNQUALIFIED
;
9157 tree raises
= NULL_TREE
;
9158 int template_count
= 0;
9159 tree returned_attrs
= NULL_TREE
;
9160 tree parms
= NULL_TREE
;
9161 const cp_declarator
*id_declarator
;
9162 /* The unqualified name of the declarator; either an
9163 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
9164 tree unqualified_id
;
9165 /* The class type, if any, in which this entity is located,
9166 or NULL_TREE if none. Note that this value may be different from
9167 the current class type; for example if an attempt is made to declare
9168 "A::f" inside "B", this value will be "A". */
9169 tree ctype
= current_class_type
;
9170 /* The NAMESPACE_DECL for the namespace in which this entity is
9171 located. If an unqualified name is used to declare the entity,
9172 this value will be NULL_TREE, even if the entity is located at
9174 tree in_namespace
= NULL_TREE
;
9175 cp_storage_class storage_class
;
9176 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
9177 bool type_was_error_mark_node
= false;
9178 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
9179 bool template_type_arg
= false;
9180 bool template_parm_flag
= false;
9181 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
9182 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
9183 bool late_return_type_p
= false;
9184 bool array_parameter_p
= false;
9185 source_location saved_loc
= input_location
;
9187 tree reqs
= NULL_TREE
;
9189 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
9190 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
9191 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
9192 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
9193 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
9194 explicit_intN
= declspecs
->explicit_intN_p
;
9195 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
9197 // Was concept_p specified? Note that ds_concept
9198 // implies ds_constexpr!
9199 bool concept_p
= decl_spec_seq_has_spec_p (declspecs
, ds_concept
);
9203 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9204 type_quals
|= TYPE_QUAL_CONST
;
9205 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9206 type_quals
|= TYPE_QUAL_VOLATILE
;
9207 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9208 type_quals
|= TYPE_QUAL_RESTRICT
;
9210 if (decl_context
== FUNCDEF
)
9211 funcdef_flag
= true, decl_context
= NORMAL
;
9212 else if (decl_context
== MEMFUNCDEF
)
9213 funcdef_flag
= true, decl_context
= FIELD
;
9214 else if (decl_context
== BITFIELD
)
9215 bitfield
= 1, decl_context
= FIELD
;
9216 else if (decl_context
== TEMPLATE_TYPE_ARG
)
9217 template_type_arg
= true, decl_context
= TYPENAME
;
9218 else if (decl_context
== TPARM
)
9219 template_parm_flag
= true, decl_context
= PARM
;
9221 if (initialized
> 1)
9222 funcdef_flag
= true;
9224 /* Look inside a declarator for the name being declared
9225 and get it as a string, for an error message. */
9226 for (id_declarator
= declarator
;
9228 id_declarator
= id_declarator
->declarator
)
9230 if (id_declarator
->kind
!= cdk_id
)
9231 innermost_code
= id_declarator
->kind
;
9233 switch (id_declarator
->kind
)
9236 if (id_declarator
->declarator
9237 && id_declarator
->declarator
->kind
== cdk_id
)
9239 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
9240 if (sfk
== sfk_destructor
)
9247 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
9248 tree decl
= id_declarator
->u
.id
.unqualified_name
;
9251 if (qualifying_scope
)
9253 if (at_function_scope_p ())
9257 A declarator-id shall not be qualified except
9260 None of the cases are permitted in block
9262 if (qualifying_scope
== global_namespace
)
9263 error ("invalid use of qualified-name %<::%D%>",
9265 else if (TYPE_P (qualifying_scope
))
9266 error ("invalid use of qualified-name %<%T::%D%>",
9267 qualifying_scope
, decl
);
9269 error ("invalid use of qualified-name %<%D::%D%>",
9270 qualifying_scope
, decl
);
9271 return error_mark_node
;
9273 else if (TYPE_P (qualifying_scope
))
9275 ctype
= qualifying_scope
;
9276 if (!MAYBE_CLASS_TYPE_P (ctype
))
9278 error ("%q#T is not a class or a namespace", ctype
);
9281 else if (innermost_code
!= cdk_function
9282 && current_class_type
9283 && !uniquely_derived_from_p (ctype
,
9284 current_class_type
))
9286 error ("invalid use of qualified-name %<%T::%D%>",
9287 qualifying_scope
, decl
);
9288 return error_mark_node
;
9291 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9292 in_namespace
= qualifying_scope
;
9294 switch (TREE_CODE (decl
))
9300 if (innermost_code
!= cdk_function
)
9302 error ("declaration of %qD as non-function", decl
);
9303 return error_mark_node
;
9305 else if (!qualifying_scope
9306 && !(current_class_type
&& at_class_scope_p ()))
9308 error ("declaration of %qD as non-member", decl
);
9309 return error_mark_node
;
9312 type
= TREE_OPERAND (decl
, 0);
9314 type
= constructor_name (type
);
9315 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9320 case TEMPLATE_ID_EXPR
:
9322 tree fns
= TREE_OPERAND (decl
, 0);
9325 if (!identifier_p (dname
))
9327 if (variable_template_p (dname
))
9328 dname
= DECL_NAME (dname
);
9331 gcc_assert (is_overloaded_fn (dname
));
9332 dname
= DECL_NAME (get_first_fn (dname
));
9338 case IDENTIFIER_NODE
:
9339 if (identifier_p (decl
))
9342 if (C_IS_RESERVED_WORD (dname
))
9344 error ("declarator-id missing; using reserved word %qD",
9346 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9348 else if (!IDENTIFIER_TYPENAME_P (dname
))
9349 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9352 gcc_assert (flags
== NO_SPECIAL
);
9353 flags
= TYPENAME_FLAG
;
9354 ctor_return_type
= TREE_TYPE (dname
);
9355 sfk
= sfk_conversion
;
9356 if (is_typename_at_global_scope (dname
))
9357 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9359 name
= "<invalid operator>";
9376 return error_mark_node
;
9381 if (id_declarator
->kind
== cdk_id
)
9387 The declarator in a function-definition shall have the form
9388 D1 ( parameter-declaration-clause) ... */
9389 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9391 error ("function definition does not declare parameters");
9392 return error_mark_node
;
9395 if (flags
== TYPENAME_FLAG
9396 && innermost_code
!= cdk_function
9397 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9399 error ("declaration of %qD as non-function", dname
);
9400 return error_mark_node
;
9404 && identifier_p (dname
)
9405 && UDLIT_OPER_P (dname
)
9406 && innermost_code
!= cdk_function
)
9408 error ("declaration of %qD as non-function", dname
);
9409 return error_mark_node
;
9412 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9416 error ("declaration of %qD as %<typedef%>", dname
);
9417 return error_mark_node
;
9419 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9421 error ("declaration of %qD as parameter", dname
);
9422 return error_mark_node
;
9426 /* Anything declared one level down from the top level
9427 must be one of the parameters of a function
9428 (because the body is at least two levels down). */
9430 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9431 by not allowing C++ class definitions to specify their parameters
9432 with xdecls (must be spec.d in the parmlist).
9434 Since we now wait to push a class scope until we are sure that
9435 we are in a legitimate method context, we must set oldcname
9436 explicitly (since current_class_name is not yet alive).
9438 We also want to avoid calling this a PARM if it is in a namespace. */
9440 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9442 cp_binding_level
*b
= current_binding_level
;
9443 current_binding_level
= b
->level_chain
;
9444 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9445 decl_context
= PARM
;
9446 current_binding_level
= b
;
9450 name
= decl_context
== PARM
? "parameter" : "type name";
9452 if (concept_p
&& typedef_p
)
9454 error ("%<concept%> cannot appear in a typedef declaration");
9455 return error_mark_node
;
9458 if (constexpr_p
&& typedef_p
)
9460 error ("%<constexpr%> cannot appear in a typedef declaration");
9461 return error_mark_node
;
9464 /* If there were multiple types specified in the decl-specifier-seq,
9465 issue an error message. */
9466 if (declspecs
->multiple_types_p
)
9468 error ("two or more data types in declaration of %qs", name
);
9469 return error_mark_node
;
9472 if (declspecs
->conflicting_specifiers_p
)
9474 error ("conflicting specifiers in declaration of %qs", name
);
9475 return error_mark_node
;
9478 /* Extract the basic type from the decl-specifier-seq. */
9479 type
= declspecs
->type
;
9480 if (type
== error_mark_node
)
9483 type_was_error_mark_node
= true;
9485 /* If the entire declaration is itself tagged as deprecated then
9486 suppress reports of deprecated items. */
9487 if (type
&& TREE_DEPRECATED (type
)
9488 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9489 warn_deprecated_use (type
, NULL_TREE
);
9490 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9492 typedef_decl
= type
;
9493 type
= TREE_TYPE (typedef_decl
);
9494 if (TREE_DEPRECATED (type
)
9495 && DECL_ARTIFICIAL (typedef_decl
)
9496 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9497 warn_deprecated_use (type
, NULL_TREE
);
9499 /* No type at all: default to `int', and set DEFAULTED_INT
9500 because it was not a user-defined typedef. */
9501 if (type
== NULL_TREE
)
9503 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9505 /* These imply 'int'. */
9506 type
= integer_type_node
;
9509 /* If we just have "complex", it is equivalent to "complex double". */
9510 else if (!longlong
&& !explicit_intN
9511 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9513 type
= double_type_node
;
9514 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9515 "ISO C++ does not support plain %<complex%> meaning "
9516 "%<double complex%>");
9520 explicit_int
= declspecs
->explicit_int_p
;
9521 explicit_char
= declspecs
->explicit_char_p
;
9524 /* See the code below that used this. */
9526 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9528 typedef_type
= type
;
9531 if (sfk
!= sfk_conversion
)
9532 ctor_return_type
= ctype
;
9534 if (sfk
!= sfk_none
)
9536 type
= check_special_function_return_type (sfk
, type
,
9539 declspecs
->locations
);
9540 type_quals
= TYPE_UNQUALIFIED
;
9542 else if (type
== NULL_TREE
)
9548 /* We handle `main' specially here, because 'main () { }' is so
9549 common. With no options, it is allowed. With -Wreturn-type,
9550 it is a warning. It is only an error with -pedantic-errors. */
9551 is_main
= (funcdef_flag
9552 && dname
&& identifier_p (dname
)
9553 && MAIN_NAME_P (dname
)
9554 && ctype
== NULL_TREE
9555 && in_namespace
== NULL_TREE
9556 && current_namespace
== global_namespace
);
9558 if (type_was_error_mark_node
)
9559 /* We've already issued an error, don't complain more. */;
9560 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9561 /* Allow it, sigh. */;
9563 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9565 pedwarn (input_location
, OPT_Wpedantic
,
9566 "ISO C++ forbids declaration of %qs with no type", name
);
9568 warning (OPT_Wreturn_type
,
9569 "ISO C++ forbids declaration of %qs with no type", name
);
9571 if (type_was_error_mark_node
&& template_parm_flag
)
9572 /* FIXME we should be able to propagate the error_mark_node as is
9573 for other contexts too. */
9574 type
= error_mark_node
;
9576 type
= integer_type_node
;
9583 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9585 error ("%<__int%d%> is not supported by this target",
9586 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9587 explicit_intN
= false;
9589 else if (pedantic
&& ! in_system_header_at (input_location
))
9590 pedwarn (input_location
, OPT_Wpedantic
,
9591 "ISO C++ does not support %<__int%d%> for %qs",
9592 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9595 /* Now process the modifiers that were specified
9596 and check for invalid combinations. */
9598 /* Long double is a special combination. */
9599 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9602 type
= cp_build_qualified_type (long_double_type_node
,
9603 cp_type_quals (type
));
9606 /* Check all other uses of type modifiers. */
9608 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9612 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9613 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9614 else if (signed_p
&& unsigned_p
)
9615 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9616 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9617 error ("%<long long%> invalid for %qs", name
);
9618 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9619 error ("%<long%> invalid for %qs", name
);
9620 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9621 error ("%<short%> invalid for %qs", name
);
9622 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9623 error ("%<long%> or %<short%> invalid for %qs", name
);
9624 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9625 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9626 else if ((long_p
|| short_p
) && explicit_char
)
9627 error ("%<long%> or %<short%> specified with char for %qs", name
);
9628 else if (long_p
&& short_p
)
9629 error ("%<long%> and %<short%> specified together for %qs", name
);
9630 else if (type
== char16_type_node
|| type
== char32_type_node
)
9632 if (signed_p
|| unsigned_p
)
9633 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9634 else if (short_p
|| long_p
)
9635 error ("%<short%> or %<long%> invalid for %qs", name
);
9640 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9642 pedwarn (input_location
, OPT_Wpedantic
,
9643 "long, short, signed or unsigned used invalidly for %qs",
9645 if (flag_pedantic_errors
)
9650 /* Discard the type modifiers if they are invalid. */
9661 /* Decide whether an integer type is signed or not.
9662 Optionally treat bitfields as signed by default. */
9666 It is implementation-defined whether a plain (neither
9667 explicitly signed or unsigned) char, short, int, or long
9668 bit-field is signed or unsigned.
9670 Naturally, we extend this to long long as well. Note that
9671 this does not include wchar_t. */
9672 || (bitfield
&& !flag_signed_bitfields
9674 /* A typedef for plain `int' without `signed' can be
9675 controlled just like plain `int', but a typedef for
9676 `signed int' cannot be so controlled. */
9678 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9679 && TREE_CODE (type
) == INTEGER_TYPE
9680 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9683 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9685 type
= long_long_unsigned_type_node
;
9687 type
= long_unsigned_type_node
;
9689 type
= short_unsigned_type_node
;
9690 else if (type
== char_type_node
)
9691 type
= unsigned_char_type_node
;
9692 else if (typedef_decl
)
9693 type
= unsigned_type_for (type
);
9695 type
= unsigned_type_node
;
9697 else if (signed_p
&& type
== char_type_node
)
9698 type
= signed_char_type_node
;
9699 else if (explicit_intN
)
9700 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9702 type
= long_long_integer_type_node
;
9704 type
= long_integer_type_node
;
9706 type
= short_integer_type_node
;
9708 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9710 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9711 error ("complex invalid for %qs", name
);
9712 /* If a modifier is specified, the resulting complex is the complex
9713 form of TYPE. E.g, "complex short" is "complex short int". */
9714 else if (type
== integer_type_node
)
9715 type
= complex_integer_type_node
;
9716 else if (type
== float_type_node
)
9717 type
= complex_float_type_node
;
9718 else if (type
== double_type_node
)
9719 type
= complex_double_type_node
;
9720 else if (type
== long_double_type_node
)
9721 type
= complex_long_double_type_node
;
9723 type
= build_complex_type (type
);
9726 /* If we're using the injected-class-name to form a compound type or a
9727 declaration, replace it with the underlying class so we don't get
9728 redundant typedefs in the debug output. But if we are returning the
9729 type unchanged, leave it alone so that it's available to
9730 maybe_get_template_decl_from_type_decl. */
9731 if (CLASS_TYPE_P (type
)
9732 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9733 && type
== TREE_TYPE (TYPE_NAME (type
))
9734 && (declarator
|| type_quals
))
9735 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9737 type_quals
|= cp_type_quals (type
);
9738 type
= cp_build_qualified_type_real
9739 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9740 || declspecs
->decltype_p
)
9741 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9742 /* We might have ignored or rejected some of the qualifiers. */
9743 type_quals
= cp_type_quals (type
);
9746 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9747 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9748 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9750 storage_class
= declspecs
->storage_class
;
9751 if (storage_class
== sc_static
)
9752 staticp
= 1 + (decl_context
== FIELD
);
9754 if (virtualp
&& staticp
== 2)
9756 error ("member %qD cannot be declared both virtual and static", dname
);
9757 storage_class
= sc_none
;
9760 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9762 /* Issue errors about use of storage classes for parameters. */
9763 if (decl_context
== PARM
)
9767 error ("typedef declaration invalid in parameter declaration");
9768 return error_mark_node
;
9770 else if (template_parm_flag
&& storage_class
!= sc_none
)
9772 error ("storage class specified for template parameter %qs", name
);
9773 return error_mark_node
;
9775 else if (storage_class
== sc_static
9776 || storage_class
== sc_extern
9778 error ("storage class specifiers invalid in parameter declarations");
9780 /* Function parameters cannot be concept. */
9782 error ("a parameter cannot be declared %<concept%>");
9783 /* Function parameters cannot be constexpr. If we saw one, moan
9784 and pretend it wasn't there. */
9785 else if (constexpr_p
)
9787 error ("a parameter cannot be declared %<constexpr%>");
9792 /* Give error if `virtual' is used outside of class declaration. */
9794 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9796 error_at (declspecs
->locations
[ds_virtual
],
9797 "%<virtual%> outside class declaration");
9801 /* Static anonymous unions are dealt with here. */
9802 if (staticp
&& decl_context
== TYPENAME
9804 && ANON_AGGR_TYPE_P (declspecs
->type
))
9805 decl_context
= FIELD
;
9807 /* Warn about storage classes that are invalid for certain
9808 kinds of declarations (parameters, typenames, etc.). */
9811 && storage_class
!= sc_extern
9812 && storage_class
!= sc_static
)
9815 error ("multiple storage classes in declaration of %qs", name
);
9818 if (decl_context
!= NORMAL
9819 && ((storage_class
!= sc_none
9820 && storage_class
!= sc_mutable
)
9823 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9824 && (storage_class
== sc_register
9825 || storage_class
== sc_auto
))
9829 else if (decl_context
== FIELD
9830 /* C++ allows static class elements. */
9831 && storage_class
== sc_static
)
9832 /* C++ also allows inlines and signed and unsigned elements,
9833 but in those cases we don't come in here. */
9837 if (decl_context
== FIELD
)
9838 error ("storage class specified for %qs", name
);
9841 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9842 error ("storage class specified for parameter %qs", name
);
9844 error ("storage class specified for typename");
9846 if (storage_class
== sc_register
9847 || storage_class
== sc_auto
9848 || storage_class
== sc_extern
9850 storage_class
= sc_none
;
9853 else if (storage_class
== sc_extern
&& funcdef_flag
9854 && ! toplevel_bindings_p ())
9855 error ("nested function %qs declared %<extern%>", name
);
9856 else if (toplevel_bindings_p ())
9858 if (storage_class
== sc_auto
)
9859 error ("top-level declaration of %qs specifies %<auto%>", name
);
9862 && storage_class
!= sc_extern
9863 && storage_class
!= sc_static
)
9865 if (declspecs
->gnu_thread_keyword_p
)
9866 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9867 "declared %<__thread%>", name
);
9869 /* When thread_local is applied to a variable of block scope the
9870 storage-class-specifier static is implied if it does not appear
9872 storage_class
= declspecs
->storage_class
= sc_static
;
9876 if (storage_class
&& friendp
)
9878 error ("storage class specifiers invalid in friend function declarations");
9879 storage_class
= sc_none
;
9884 unqualified_id
= NULL_TREE
;
9887 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9888 switch (TREE_CODE (unqualified_id
))
9891 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9892 if (TYPE_P (unqualified_id
))
9893 unqualified_id
= constructor_name (unqualified_id
);
9896 case IDENTIFIER_NODE
:
9897 case TEMPLATE_ID_EXPR
:
9905 if (declspecs
->std_attributes
)
9907 /* Apply the c++11 attributes to the type preceding them. */
9908 input_location
= declspecs
->locations
[ds_std_attribute
];
9909 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9910 input_location
= saved_loc
;
9913 /* Determine the type of the entity declared by recurring on the
9915 for (; declarator
; declarator
= declarator
->declarator
)
9917 const cp_declarator
*inner_declarator
;
9920 if (type
== error_mark_node
)
9921 return error_mark_node
;
9923 attrs
= declarator
->attributes
;
9929 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9930 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9931 if (declarator
->kind
== cdk_function
)
9932 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9933 if (declarator
->kind
== cdk_array
)
9934 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9935 returned_attrs
= decl_attributes (&type
,
9936 chainon (returned_attrs
, attrs
),
9940 if (declarator
->kind
== cdk_id
)
9943 inner_declarator
= declarator
->declarator
;
9945 switch (declarator
->kind
)
9948 type
= create_array_type_for_decl (dname
, type
,
9949 declarator
->u
.array
.bounds
);
9950 if (declarator
->std_attributes
)
9953 The optional attribute-specifier-seq appertains to the
9955 returned_attrs
= chainon (returned_attrs
,
9956 declarator
->std_attributes
);
9964 /* Declaring a function type.
9965 Make sure we have a valid type for the function to return. */
9967 if (type_quals
!= TYPE_UNQUALIFIED
)
9969 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9970 warning (OPT_Wignored_qualifiers
,
9971 "type qualifiers ignored on function return type");
9972 /* We now know that the TYPE_QUALS don't apply to the
9973 decl, but to its return type. */
9974 type_quals
= TYPE_UNQUALIFIED
;
9976 errmsg
= targetm
.invalid_return_type (type
);
9980 type
= integer_type_node
;
9983 /* Error about some types functions can't return. */
9985 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9987 error ("%qs declared as function returning a function", name
);
9988 return error_mark_node
;
9990 if (TREE_CODE (type
) == ARRAY_TYPE
)
9992 error ("%qs declared as function returning an array", name
);
9993 return error_mark_node
;
9996 input_location
= declspecs
->locations
[ds_type_spec
];
9997 abstract_virtuals_error (ACU_RETURN
, type
);
9998 input_location
= saved_loc
;
10000 /* Pick up type qualifiers which should be applied to `this'. */
10001 memfn_quals
= declarator
->u
.function
.qualifiers
;
10002 /* Pick up virt-specifiers. */
10003 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
10004 /* And ref-qualifier, too */
10005 rqual
= declarator
->u
.function
.ref_qualifier
;
10006 /* And tx-qualifier. */
10007 tree tx_qual
= declarator
->u
.function
.tx_qualifier
;
10008 /* Pick up the exception specifications. */
10009 raises
= declarator
->u
.function
.exception_specification
;
10010 /* If the exception-specification is ill-formed, let's pretend
10011 there wasn't one. */
10012 if (raises
== error_mark_node
)
10013 raises
= NULL_TREE
;
10016 error_at (location_of (reqs
), "requires-clause on return type");
10017 reqs
= declarator
->u
.function
.requires_clause
;
10019 /* Say it's a definition only for the CALL_EXPR
10020 closest to the identifier. */
10021 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
10023 /* Handle a late-specified return type. */
10026 if (type_uses_auto (type
))
10028 if (!declarator
->u
.function
.late_return_type
)
10030 if (current_class_type
10031 && LAMBDA_TYPE_P (current_class_type
))
10032 /* OK for C++11 lambdas. */;
10033 else if (cxx_dialect
< cxx14
)
10035 error ("%qs function uses "
10036 "%<auto%> type specifier without trailing "
10037 "return type", name
);
10038 inform (input_location
, "deduced return type "
10039 "only available with -std=c++14 or "
10044 error ("virtual function cannot "
10045 "have deduced return type");
10049 else if (!is_auto (type
) && sfk
!= sfk_conversion
)
10051 error ("%qs function with trailing return type has"
10052 " %qT as its type rather than plain %<auto%>",
10054 return error_mark_node
;
10057 else if (declarator
->u
.function
.late_return_type
10058 && sfk
!= sfk_conversion
)
10060 if (cxx_dialect
< cxx11
)
10061 /* Not using maybe_warn_cpp0x because this should
10062 always be an error. */
10063 error ("trailing return type only available with "
10064 "-std=c++11 or -std=gnu++11");
10066 error ("%qs function with trailing return type not "
10067 "declared with %<auto%> type specifier", name
);
10068 return error_mark_node
;
10071 type
= splice_late_return_type
10072 (type
, declarator
->u
.function
.late_return_type
);
10073 if (type
== error_mark_node
)
10074 return error_mark_node
;
10076 if (declarator
->u
.function
.late_return_type
)
10077 late_return_type_p
= true;
10079 if (ctype
== NULL_TREE
10080 && decl_context
== FIELD
10083 ctype
= current_class_type
;
10085 if (ctype
&& (sfk
== sfk_constructor
10086 || sfk
== sfk_destructor
))
10088 /* We are within a class's scope. If our declarator name
10089 is the same as the class name, and we are defining
10090 a function, then it is a constructor/destructor, and
10091 therefore returns a void type. */
10093 /* ISO C++ 12.4/2. A destructor may not be declared
10094 const or volatile. A destructor may not be static.
10095 A destructor may not be declared with ref-qualifier.
10097 ISO C++ 12.1. A constructor may not be declared
10098 const or volatile. A constructor may not be
10099 virtual. A constructor may not be static.
10100 A constructor may not be declared with ref-qualifier. */
10102 error ((flags
== DTOR_FLAG
)
10103 ? G_("destructor cannot be static member function")
10104 : G_("constructor cannot be static member function"));
10107 error ((flags
== DTOR_FLAG
)
10108 ? G_("destructors may not be cv-qualified")
10109 : G_("constructors may not be cv-qualified"));
10110 memfn_quals
= TYPE_UNQUALIFIED
;
10115 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
10116 error ((flags
== DTOR_FLAG
)
10117 ? "destructors may not be ref-qualified"
10118 : "constructors may not be ref-qualified");
10119 rqual
= REF_QUAL_NONE
;
10122 if (decl_context
== FIELD
10123 && !member_function_or_else (ctype
,
10124 current_class_type
,
10126 return error_mark_node
;
10128 if (flags
!= DTOR_FLAG
)
10130 /* It's a constructor. */
10131 if (explicitp
== 1)
10135 permerror (input_location
, "constructors cannot be declared virtual");
10138 if (decl_context
== FIELD
10139 && sfk
!= sfk_constructor
)
10140 return error_mark_node
;
10142 if (decl_context
== FIELD
)
10149 /* Cannot be both friend and virtual. */
10150 error ("virtual functions cannot be friends");
10153 if (decl_context
== NORMAL
)
10154 error ("friend declaration not in class definition");
10155 if (current_function_decl
&& funcdef_flag
)
10156 error ("can%'t define friend function %qs in a local "
10157 "class definition",
10160 else if (ctype
&& sfk
== sfk_conversion
)
10162 if (explicitp
== 1)
10164 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
10167 if (late_return_type_p
)
10168 error ("a conversion function cannot have a trailing return type");
10171 arg_types
= grokparms (declarator
->u
.function
.parameters
,
10174 if (inner_declarator
10175 && inner_declarator
->kind
== cdk_id
10176 && inner_declarator
->u
.id
.sfk
== sfk_destructor
10177 && arg_types
!= void_list_node
)
10179 error ("destructors may not have parameters");
10180 arg_types
= void_list_node
;
10184 type
= build_function_type (type
, arg_types
);
10186 tree attrs
= declarator
->std_attributes
;
10189 tree att
= build_tree_list (tx_qual
, NULL_TREE
);
10190 /* transaction_safe applies to the type, but
10191 transaction_safe_dynamic applies to the function. */
10192 if (is_attribute_p ("transaction_safe", tx_qual
))
10193 attrs
= chainon (attrs
, att
);
10195 returned_attrs
= chainon (returned_attrs
, att
);
10200 The optional attribute-specifier-seq appertains to
10201 the function type. */
10202 decl_attributes (&type
, attrs
, 0);
10207 case cdk_reference
:
10209 /* Filter out pointers-to-references and references-to-references.
10210 We can get these if a TYPE_DECL is used. */
10212 if (TREE_CODE (type
) == REFERENCE_TYPE
)
10214 if (declarator
->kind
!= cdk_reference
)
10216 error ("cannot declare pointer to %q#T", type
);
10217 type
= TREE_TYPE (type
);
10220 /* In C++0x, we allow reference to reference declarations
10221 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
10222 and template type arguments [14.3.1/4 temp.arg.type]. The
10223 check for direct reference to reference declarations, which
10224 are still forbidden, occurs below. Reasoning behind the change
10225 can be found in DR106, DR540, and the rvalue reference
10227 else if (cxx_dialect
== cxx98
)
10229 error ("cannot declare reference to %q#T", type
);
10230 type
= TREE_TYPE (type
);
10233 else if (VOID_TYPE_P (type
))
10235 if (declarator
->kind
== cdk_reference
)
10236 error ("cannot declare reference to %q#T", type
);
10237 else if (declarator
->kind
== cdk_ptrmem
)
10238 error ("cannot declare pointer to %q#T member", type
);
10241 /* We now know that the TYPE_QUALS don't apply to the decl,
10242 but to the target of the pointer. */
10243 type_quals
= TYPE_UNQUALIFIED
;
10245 /* This code used to handle METHOD_TYPE, but I don't think it's
10246 possible to get it here anymore. */
10247 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
10248 if (declarator
->kind
== cdk_ptrmem
10249 && TREE_CODE (type
) == FUNCTION_TYPE
)
10251 memfn_quals
|= type_memfn_quals (type
);
10252 type
= build_memfn_type (type
,
10253 declarator
->u
.pointer
.class_type
,
10256 if (type
== error_mark_node
)
10257 return error_mark_node
;
10259 rqual
= REF_QUAL_NONE
;
10260 memfn_quals
= TYPE_UNQUALIFIED
;
10263 if (TREE_CODE (type
) == FUNCTION_TYPE
10264 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
10265 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
10266 error (declarator
->kind
== cdk_reference
10267 ? G_("cannot declare reference to qualified function type %qT")
10268 : G_("cannot declare pointer to qualified function type %qT"),
10271 /* When the pointed-to type involves components of variable size,
10272 care must be taken to ensure that the size evaluation code is
10273 emitted early enough to dominate all the possible later uses
10274 and late enough for the variables on which it depends to have
10277 This is expected to happen automatically when the pointed-to
10278 type has a name/declaration of it's own, but special attention
10279 is required if the type is anonymous.
10281 We handle the NORMAL and FIELD contexts here by inserting a
10282 dummy statement that just evaluates the size at a safe point
10283 and ensures it is not deferred until e.g. within a deeper
10284 conditional context (c++/43555).
10286 We expect nothing to be needed here for PARM or TYPENAME.
10287 Evaluating the size at this point for TYPENAME would
10288 actually be incorrect, as we might be in the middle of an
10289 expression with side effects on the pointed-to type size
10290 "arguments" prior to the pointer declaration point and the
10291 size evaluation could end up prior to the side effects. */
10293 if (!TYPE_NAME (type
)
10294 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10295 && at_function_scope_p ()
10296 && variably_modified_type_p (type
, NULL_TREE
))
10297 /* Force evaluation of the SAVE_EXPR. */
10298 finish_expr_stmt (TYPE_SIZE (type
));
10300 if (declarator
->kind
== cdk_reference
)
10302 /* In C++0x, the type we are creating a reference to might be
10303 a typedef which is itself a reference type. In that case,
10304 we follow the reference collapsing rules in
10305 [7.1.3/8 dcl.typedef] to create the final reference type:
10307 "If a typedef TD names a type that is a reference to a type
10308 T, an attempt to create the type 'lvalue reference to cv TD'
10309 creates the type 'lvalue reference to T,' while an attempt
10310 to create the type "rvalue reference to cv TD' creates the
10313 if (VOID_TYPE_P (type
))
10314 /* We already gave an error. */;
10315 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10317 if (declarator
->u
.reference
.rvalue_ref
)
10318 /* Leave type alone. */;
10320 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10323 type
= cp_build_reference_type
10324 (type
, declarator
->u
.reference
.rvalue_ref
);
10326 /* In C++0x, we need this check for direct reference to
10327 reference declarations, which are forbidden by
10328 [8.3.2/5 dcl.ref]. Reference to reference declarations
10329 are only allowed indirectly through typedefs and template
10330 type arguments. Example:
10332 void foo(int & &); // invalid ref-to-ref decl
10334 typedef int & int_ref;
10335 void foo(int_ref &); // valid ref-to-ref decl
10337 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10338 error ("cannot declare reference to %q#T, which is not "
10339 "a typedef or a template type argument", type
);
10341 else if (TREE_CODE (type
) == METHOD_TYPE
)
10342 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10343 else if (declarator
->kind
== cdk_ptrmem
)
10345 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10346 != NAMESPACE_DECL
);
10347 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10348 /* We will already have complained. */
10349 type
= error_mark_node
;
10351 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10355 type
= build_pointer_type (type
);
10357 /* Process a list of type modifier keywords (such as
10358 const or volatile) that were given inside the `*' or `&'. */
10360 if (declarator
->u
.pointer
.qualifiers
)
10363 = cp_build_qualified_type (type
,
10364 declarator
->u
.pointer
.qualifiers
);
10365 type_quals
= cp_type_quals (type
);
10368 /* Apply C++11 attributes to the pointer, and not to the
10369 type pointed to. This is unlike what is done for GNU
10370 attributes above. It is to comply with [dcl.ptr]/1:
10372 [the optional attribute-specifier-seq (7.6.1) appertains
10373 to the pointer and not to the object pointed to]. */
10374 if (declarator
->std_attributes
)
10375 decl_attributes (&type
, declarator
->std_attributes
,
10385 gcc_unreachable ();
10389 /* A `constexpr' specifier used in an object declaration declares
10390 the object as `const'. */
10391 if (constexpr_p
&& innermost_code
!= cdk_function
)
10393 /* DR1688 says that a `constexpr' specifier in combination with
10394 `volatile' is valid. */
10396 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10398 type_quals
|= TYPE_QUAL_CONST
;
10399 type
= cp_build_qualified_type (type
, type_quals
);
10403 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10404 && TREE_CODE (type
) != FUNCTION_TYPE
10405 && TREE_CODE (type
) != METHOD_TYPE
10406 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10408 error ("template-id %qD used as a declarator",
10410 unqualified_id
= dname
;
10413 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10414 qualified with a class-name, turn it into a METHOD_TYPE, unless
10415 we know that the function is static. We take advantage of this
10416 opportunity to do other processing that pertains to entities
10417 explicitly declared to be class members. Note that if DECLARATOR
10418 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10419 would not have exited the loop above. */
10421 && declarator
->u
.id
.qualifying_scope
10422 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10424 ctype
= declarator
->u
.id
.qualifying_scope
;
10425 ctype
= TYPE_MAIN_VARIANT (ctype
);
10426 template_count
= num_template_headers_for_class (ctype
);
10428 if (ctype
== current_class_type
)
10432 permerror (input_location
, "member functions are implicitly friends of their class");
10436 permerror (declarator
->id_loc
,
10437 "extra qualification %<%T::%> on member %qs",
10440 else if (/* If the qualifying type is already complete, then we
10441 can skip the following checks. */
10442 !COMPLETE_TYPE_P (ctype
)
10443 && (/* If the function is being defined, then
10444 qualifying type must certainly be complete. */
10446 /* A friend declaration of "T::f" is OK, even if
10447 "T" is a template parameter. But, if this
10448 function is not a friend, the qualifying type
10449 must be a class. */
10450 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10451 /* For a declaration, the type need not be
10452 complete, if either it is dependent (since there
10453 is no meaningful definition of complete in that
10454 case) or the qualifying class is currently being
10456 || !(dependent_type_p (ctype
)
10457 || currently_open_class (ctype
)))
10458 /* Check that the qualifying type is complete. */
10459 && !complete_type_or_else (ctype
, NULL_TREE
))
10460 return error_mark_node
;
10461 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10463 if (current_class_type
10464 && (!friendp
|| funcdef_flag
))
10466 error (funcdef_flag
10467 ? G_("cannot define member function %<%T::%s%> "
10469 : G_("cannot declare member function %<%T::%s%> "
10471 ctype
, name
, current_class_type
);
10472 return error_mark_node
;
10475 else if (typedef_p
&& current_class_type
)
10477 error ("cannot declare member %<%T::%s%> within %qT",
10478 ctype
, name
, current_class_type
);
10479 return error_mark_node
;
10483 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10484 ctype
= current_class_type
;
10486 /* Now TYPE has the actual type. */
10488 if (returned_attrs
)
10491 *attrlist
= chainon (returned_attrs
, *attrlist
);
10493 attrlist
= &returned_attrs
;
10497 && declarator
->kind
== cdk_id
10498 && declarator
->std_attributes
)
10499 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10500 a declarator-id appertains to the entity that is declared. */
10501 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10503 /* Handle parameter packs. */
10504 if (parameter_pack_p
)
10506 if (decl_context
== PARM
)
10507 /* Turn the type into a pack expansion.*/
10508 type
= make_pack_expansion (type
);
10510 error ("non-parameter %qs cannot be a parameter pack", name
);
10513 /* Did array size calculations overflow or does the array cover more
10514 than half of the address-space? */
10515 if (TREE_CODE (type
) == ARRAY_TYPE
10516 && COMPLETE_TYPE_P (type
)
10517 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10518 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10520 error ("size of array %qs is too large", name
);
10521 /* If we proceed with the array type as it is, we'll eventually
10522 crash in tree_to_[su]hwi(). */
10523 type
= error_mark_node
;
10526 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10527 && !processing_template_decl
10528 && variably_modified_type_p (type
, NULL_TREE
))
10530 if (decl_context
== FIELD
)
10531 error ("data member may not have variably modified type %qT", type
);
10533 error ("parameter may not have variably modified type %qT", type
);
10534 type
= error_mark_node
;
10537 if (explicitp
== 1 || (explicitp
&& friendp
))
10539 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10540 in the declaration of a constructor or conversion function within
10541 a class definition. */
10542 if (!current_class_type
)
10543 error_at (declspecs
->locations
[ds_explicit
],
10544 "%<explicit%> outside class declaration");
10546 error_at (declspecs
->locations
[ds_explicit
],
10547 "%<explicit%> in friend declaration");
10549 error_at (declspecs
->locations
[ds_explicit
],
10550 "only declarations of constructors and conversion operators "
10551 "can be %<explicit%>");
10555 if (storage_class
== sc_mutable
)
10557 if (decl_context
!= FIELD
|| friendp
)
10559 error ("non-member %qs cannot be declared %<mutable%>", name
);
10560 storage_class
= sc_none
;
10562 else if (decl_context
== TYPENAME
|| typedef_p
)
10564 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10565 storage_class
= sc_none
;
10567 else if (TREE_CODE (type
) == FUNCTION_TYPE
10568 || TREE_CODE (type
) == METHOD_TYPE
)
10570 error ("function %qs cannot be declared %<mutable%>", name
);
10571 storage_class
= sc_none
;
10575 error ("static %qs cannot be declared %<mutable%>", name
);
10576 storage_class
= sc_none
;
10578 else if (type_quals
& TYPE_QUAL_CONST
)
10580 error ("const %qs cannot be declared %<mutable%>", name
);
10581 storage_class
= sc_none
;
10583 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10585 permerror (input_location
, "reference %qs cannot be declared "
10586 "%<mutable%>", name
);
10587 storage_class
= sc_none
;
10591 /* If this is declaring a typedef name, return a TYPE_DECL. */
10592 if (typedef_p
&& decl_context
!= TYPENAME
)
10596 /* Note that the grammar rejects storage classes
10597 in typenames, fields or parameters. */
10598 if (current_lang_name
== lang_name_java
)
10599 TYPE_FOR_JAVA (type
) = 1;
10601 /* This declaration:
10603 typedef void f(int) const;
10605 declares a function type which is not a member of any
10606 particular class, but which is cv-qualified; for
10607 example "f S::*" declares a pointer to a const-qualified
10608 member function of S. We record the cv-qualification in the
10610 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10612 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10614 /* We have now dealt with these qualifiers. */
10615 memfn_quals
= TYPE_UNQUALIFIED
;
10616 rqual
= REF_QUAL_NONE
;
10619 if (type_uses_auto (type
))
10621 error ("typedef declared %<auto%>");
10622 type
= error_mark_node
;
10626 error_at (location_of (reqs
), "requires-clause on typedef");
10628 if (decl_context
== FIELD
)
10629 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10631 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10632 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10633 error_at (DECL_SOURCE_LOCATION (decl
),
10634 "typedef name may not be a nested-name-specifier");
10635 TREE_TYPE (decl
) = error_mark_node
;
10638 if (decl_context
!= FIELD
)
10640 if (!current_function_decl
)
10641 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10642 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10643 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10644 (current_function_decl
)))
10645 /* The TYPE_DECL is "abstract" because there will be
10646 clones of this constructor/destructor, and there will
10647 be copies of this TYPE_DECL generated in those
10648 clones. The decloning optimization (for space) may
10649 revert this subsequently if it determines that
10650 the clones should share a common implementation. */
10651 DECL_ABSTRACT_P (decl
) = true;
10653 else if (current_class_type
10654 && constructor_name_p (unqualified_id
, current_class_type
))
10655 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10656 "as enclosing class",
10659 /* If the user declares "typedef struct {...} foo" then the
10660 struct will have an anonymous name. Fill that name in now.
10661 Nothing can refer to it, so nothing needs know about the name
10663 if (type
!= error_mark_node
10665 && TYPE_NAME (type
)
10666 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10667 && TYPE_ANONYMOUS_P (type
)
10668 && declspecs
->type_definition_p
10669 && attributes_naming_typedef_ok (*attrlist
)
10670 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10674 /* Replace the anonymous name with the real name everywhere. */
10675 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10677 if (anon_aggrname_p (TYPE_IDENTIFIER (t
)))
10678 /* We do not rename the debug info representing the
10679 anonymous tagged type because the standard says in
10680 [dcl.typedef] that the naming applies only for
10681 linkage purposes. */
10682 /*debug_hooks->set_name (t, decl);*/
10683 TYPE_NAME (t
) = decl
;
10686 if (TYPE_LANG_SPECIFIC (type
))
10687 TYPE_WAS_ANONYMOUS (type
) = 1;
10689 /* If this is a typedef within a template class, the nested
10690 type is a (non-primary) template. The name for the
10691 template needs updating as well. */
10692 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10693 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10694 = TYPE_IDENTIFIER (type
);
10696 /* Adjust linkage now that we aren't anonymous anymore. */
10697 reset_type_linkage (type
);
10699 /* FIXME remangle member functions; member functions of a
10700 type with external linkage have external linkage. */
10704 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10705 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10707 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10708 memfn_quals
!= TYPE_UNQUALIFIED
,
10709 inlinep
, friendp
, raises
!= NULL_TREE
);
10711 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10712 /* Acknowledge that this was written:
10713 `using analias = atype;'. */
10714 TYPE_DECL_ALIAS_P (decl
) = 1;
10719 /* Detect the case of an array type of unspecified size
10720 which came, as such, direct from a typedef name.
10721 We must copy the type, so that the array's domain can be
10722 individually set by the object's initializer. */
10724 if (type
&& typedef_type
10725 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10726 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10727 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10729 /* Detect where we're using a typedef of function type to declare a
10730 function. PARMS will not be set, so we must create it now. */
10732 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10734 tree decls
= NULL_TREE
;
10737 for (args
= TYPE_ARG_TYPES (type
);
10738 args
&& args
!= void_list_node
;
10739 args
= TREE_CHAIN (args
))
10741 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10743 DECL_CHAIN (decl
) = decls
;
10747 parms
= nreverse (decls
);
10749 if (decl_context
!= TYPENAME
)
10751 /* The qualifiers on the function type become the qualifiers on
10752 the non-static member function. */
10753 memfn_quals
|= type_memfn_quals (type
);
10754 rqual
= type_memfn_rqual (type
);
10755 type_quals
= TYPE_UNQUALIFIED
;
10759 /* If this is a type name (such as, in a cast or sizeof),
10760 compute the type and return it now. */
10762 if (decl_context
== TYPENAME
)
10764 /* Note that here we don't care about type_quals. */
10766 /* Special case: "friend class foo" looks like a TYPENAME context. */
10771 error ("%<inline%> specified for friend class declaration");
10777 /* Don't allow friend declaration without a class-key. */
10778 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10779 permerror (input_location
, "template parameters cannot be friends");
10780 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10781 permerror (input_location
, "friend declaration requires class-key, "
10782 "i.e. %<friend class %T::%D%>",
10783 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10785 permerror (input_location
, "friend declaration requires class-key, "
10786 "i.e. %<friend %#T%>",
10790 /* Only try to do this stuff if we didn't already give up. */
10791 if (type
!= integer_type_node
)
10793 /* A friendly class? */
10794 if (current_class_type
)
10795 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10796 /*complain=*/true);
10798 error ("trying to make class %qT a friend of global scope",
10801 type
= void_type_node
;
10804 else if (memfn_quals
|| rqual
)
10806 if (ctype
== NULL_TREE
10807 && TREE_CODE (type
) == METHOD_TYPE
)
10808 ctype
= TYPE_METHOD_BASETYPE (type
);
10811 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10812 /* Core issue #547: need to allow this in template type args.
10813 Allow it in general in C++11 for alias-declarations. */
10814 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10815 && TREE_CODE (type
) == FUNCTION_TYPE
)
10816 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10818 error ("invalid qualifiers on non-member function type");
10822 error_at (location_of (reqs
), "requires-clause on type-id");
10826 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10827 && decl_context
!= CATCHPARM
10828 && TREE_CODE (type
) != UNION_TYPE
10831 error ("abstract declarator %qT used as declaration", type
);
10832 return error_mark_node
;
10835 /* Only functions may be declared using an operator-function-id. */
10837 && IDENTIFIER_OPNAME_P (unqualified_id
)
10838 && TREE_CODE (type
) != FUNCTION_TYPE
10839 && TREE_CODE (type
) != METHOD_TYPE
)
10841 error ("declaration of %qD as non-function", unqualified_id
);
10842 return error_mark_node
;
10846 && TREE_CODE (type
) != FUNCTION_TYPE
10847 && TREE_CODE (type
) != METHOD_TYPE
)
10848 error_at (location_of (reqs
),
10849 "requires-clause on declaration of non-function type %qT",
10852 /* We don't check parameter types here because we can emit a better
10853 error message later. */
10854 if (decl_context
!= PARM
)
10856 type
= check_var_type (unqualified_id
, type
);
10857 if (type
== error_mark_node
)
10858 return error_mark_node
;
10861 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10862 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10864 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10866 if (ctype
|| in_namespace
)
10867 error ("cannot use %<::%> in parameter declaration");
10869 if (type_uses_auto (type
))
10871 if (cxx_dialect
>= cxx14
)
10872 error ("%<auto%> parameter not permitted in this context");
10874 error ("parameter declared %<auto%>");
10875 type
= error_mark_node
;
10878 /* A parameter declared as an array of T is really a pointer to T.
10879 One declared as a function is really a pointer to a function.
10880 One declared as a member is really a pointer to member. */
10882 if (TREE_CODE (type
) == ARRAY_TYPE
)
10884 /* Transfer const-ness of array into that of type pointed to. */
10885 type
= build_pointer_type (TREE_TYPE (type
));
10886 type_quals
= TYPE_UNQUALIFIED
;
10887 array_parameter_p
= true;
10889 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10890 type
= build_pointer_type (type
);
10893 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10894 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10896 cp_cv_quals real_quals
= memfn_quals
;
10897 if (cxx_dialect
< cxx14
&& constexpr_p
10898 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10899 real_quals
|= TYPE_QUAL_CONST
;
10900 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10906 if (decl_context
== PARM
)
10908 decl
= cp_build_parm_decl (unqualified_id
, type
);
10909 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10911 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10912 memfn_quals
!= TYPE_UNQUALIFIED
,
10913 inlinep
, friendp
, raises
!= NULL_TREE
);
10915 else if (decl_context
== FIELD
)
10917 if (!staticp
&& !friendp
&& TREE_CODE (type
) != METHOD_TYPE
10918 && type_uses_auto (type
))
10920 error ("non-static data member declared %<auto%>");
10921 type
= error_mark_node
;
10924 /* The C99 flexible array extension. */
10925 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10926 && TYPE_DOMAIN (type
) == NULL_TREE
)
10928 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10929 tf_warning_or_error
);
10930 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10933 if (type
== error_mark_node
)
10935 /* Happens when declaring arrays of sizes which
10936 are error_mark_node, for example. */
10939 else if (in_namespace
&& !friendp
)
10941 /* Something like struct S { int N::j; }; */
10942 error ("invalid use of %<::%>");
10943 return error_mark_node
;
10945 else if (TREE_CODE (type
) == FUNCTION_TYPE
10946 || TREE_CODE (type
) == METHOD_TYPE
)
10949 tree function_context
;
10953 /* This should never happen in pure C++ (the check
10954 could be an assert). It could happen in
10955 Objective-C++ if someone writes invalid code that
10956 uses a function declaration for an instance
10957 variable or property (instance variables and
10958 properties are parsed as FIELD_DECLs, but they are
10959 part of an Objective-C class, not a C++ class).
10960 That code is invalid and is caught by this
10964 error ("declaration of function %qD in invalid context",
10966 return error_mark_node
;
10969 /* ``A union may [ ... ] not [ have ] virtual functions.''
10971 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10973 error ("function %qD declared virtual inside a union",
10975 return error_mark_node
;
10978 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10982 error ("%qD cannot be declared virtual, since it "
10983 "is always static",
10990 /* Check that the name used for a destructor makes sense. */
10991 if (sfk
== sfk_destructor
)
10993 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10997 gcc_assert (friendp
);
10998 error ("expected qualified name in friend declaration "
10999 "for destructor %qD", uqname
);
11000 return error_mark_node
;
11003 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
11005 error ("declaration of %qD as member of %qT",
11007 return error_mark_node
;
11011 error ("a destructor cannot be %<concept%>");
11012 return error_mark_node
;
11016 error ("a destructor cannot be %<constexpr%>");
11017 return error_mark_node
;
11020 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
11022 error ("expected qualified name in friend declaration "
11023 "for constructor %qD",
11024 id_declarator
->u
.id
.unqualified_name
);
11025 return error_mark_node
;
11027 if (sfk
== sfk_constructor
)
11030 error ("a constructor cannot be %<concept%>");
11031 return error_mark_node
;
11035 error ("a concept cannot be a member function");
11039 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
11041 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
11042 if (variable_template_p (tmpl
))
11044 error ("specialization of variable template %qD "
11045 "declared as function", tmpl
);
11046 inform (DECL_SOURCE_LOCATION (tmpl
),
11047 "variable template declared here");
11048 return error_mark_node
;
11052 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
11053 function_context
= (ctype
!= NULL_TREE
) ?
11054 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
11055 publicp
= (! friendp
|| ! staticp
)
11056 && function_context
== NULL_TREE
;
11058 if (late_return_type_p
)
11059 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
11061 decl
= grokfndecl (ctype
, type
,
11062 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
11063 ? unqualified_id
: dname
,
11067 virtualp
, flags
, memfn_quals
, rqual
, raises
,
11068 friendp
? -1 : 0, friendp
, publicp
,
11069 inlinep
| (2 * constexpr_p
) | (4 * concept_p
),
11070 initialized
== SD_DELETED
, sfk
,
11071 funcdef_flag
, template_count
, in_namespace
,
11072 attrlist
, declarator
->id_loc
);
11073 decl
= set_virt_specifiers (decl
, virt_specifiers
);
11074 if (decl
== NULL_TREE
)
11075 return error_mark_node
;
11077 /* This clobbers the attrs stored in `decl' from `attrlist'. */
11078 /* The decl and setting of decl_attr is also turned off. */
11079 decl
= build_decl_attribute_variant (decl
, decl_attr
);
11082 /* [class.conv.ctor]
11084 A constructor declared without the function-specifier
11085 explicit that can be called with a single parameter
11086 specifies a conversion from the type of its first
11087 parameter to the type of its class. Such a constructor
11088 is called a converting constructor. */
11089 if (explicitp
== 2)
11090 DECL_NONCONVERTING_P (decl
) = 1;
11092 else if (!staticp
&& !dependent_type_p (type
)
11093 && !COMPLETE_TYPE_P (complete_type (type
))
11094 && (TREE_CODE (type
) != ARRAY_TYPE
11095 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
11096 || initialized
== 0))
11098 if (unqualified_id
)
11100 error ("field %qD has incomplete type %qT",
11101 unqualified_id
, type
);
11102 cxx_incomplete_type_inform (strip_array_types (type
));
11105 error ("name %qT has incomplete type", type
);
11107 type
= error_mark_node
;
11114 error ("%qE is neither function nor member function; "
11115 "cannot be declared friend", unqualified_id
);
11123 /* Friends are treated specially. */
11124 if (ctype
== current_class_type
)
11125 ; /* We already issued a permerror. */
11126 else if (decl
&& DECL_NAME (decl
))
11128 if (template_class_depth (current_class_type
) == 0)
11130 decl
= check_explicit_specialization
11131 (unqualified_id
, decl
, template_count
,
11132 2 * funcdef_flag
+ 4);
11133 if (decl
== error_mark_node
)
11134 return error_mark_node
;
11137 decl
= do_friend (ctype
, unqualified_id
, decl
,
11143 return error_mark_node
;
11146 /* Structure field. It may not be a function, except for C++. */
11148 if (decl
== NULL_TREE
)
11152 /* C++ allows static class members. All other work
11153 for this is done by grokfield. */
11154 decl
= build_lang_decl_loc (declarator
11155 ? declarator
->id_loc
11157 VAR_DECL
, unqualified_id
, type
);
11158 set_linkage_for_static_data_member (decl
);
11159 /* Even if there is an in-class initialization, DECL
11160 is considered undefined until an out-of-class
11161 definition is provided. */
11162 DECL_EXTERNAL (decl
) = 1;
11166 CP_DECL_THREAD_LOCAL_P (decl
) = true;
11167 if (!processing_template_decl
)
11168 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
11169 if (declspecs
->gnu_thread_keyword_p
)
11170 SET_DECL_GNU_TLS_P (decl
);
11173 error ("static data member %qE declared %<concept%>",
11175 else if (constexpr_p
&& !initialized
)
11177 error ("constexpr static data member %qD must have an "
11178 "initializer", decl
);
11179 constexpr_p
= false;
11185 error ("non-static data member %qE declared %<concept%>",
11187 else if (constexpr_p
)
11189 error ("non-static data member %qE declared %<constexpr%>",
11191 constexpr_p
= false;
11193 decl
= build_decl (input_location
,
11194 FIELD_DECL
, unqualified_id
, type
);
11195 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
11196 if (bitfield
&& !unqualified_id
)
11197 TREE_NO_WARNING (decl
) = 1;
11199 if (storage_class
== sc_mutable
)
11201 DECL_MUTABLE_P (decl
) = 1;
11202 storage_class
= sc_none
;
11207 /* An attempt is being made to initialize a non-static
11208 member. This is new in C++11. */
11209 maybe_warn_cpp0x (CPP0X_NSDMI
);
11211 /* If this has been parsed with static storage class, but
11212 errors forced staticp to be cleared, ensure NSDMI is
11214 if (declspecs
->storage_class
== sc_static
)
11215 DECL_INITIAL (decl
) = error_mark_node
;
11219 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
11220 memfn_quals
!= TYPE_UNQUALIFIED
,
11221 inlinep
, friendp
, raises
!= NULL_TREE
);
11224 else if (TREE_CODE (type
) == FUNCTION_TYPE
11225 || TREE_CODE (type
) == METHOD_TYPE
)
11227 tree original_name
;
11230 if (!unqualified_id
)
11231 return error_mark_node
;
11233 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
11234 original_name
= dname
;
11236 original_name
= unqualified_id
;
11238 if (storage_class
== sc_auto
)
11239 error ("storage class %<auto%> invalid for function %qs", name
);
11240 else if (storage_class
== sc_register
)
11241 error ("storage class %<register%> invalid for function %qs", name
);
11244 if (declspecs
->gnu_thread_keyword_p
)
11245 error ("storage class %<__thread%> invalid for function %qs",
11248 error ("storage class %<thread_local%> invalid for function %qs",
11252 if (virt_specifiers
)
11253 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
11254 /* Function declaration not at top level.
11255 Storage classes other than `extern' are not allowed
11256 and `extern' makes no difference. */
11257 if (! toplevel_bindings_p ()
11258 && (storage_class
== sc_static
11259 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
11262 if (storage_class
== sc_static
)
11263 pedwarn (input_location
, OPT_Wpedantic
,
11264 "%<static%> specified invalid for function %qs "
11265 "declared out of global scope", name
);
11267 pedwarn (input_location
, OPT_Wpedantic
,
11268 "%<inline%> specifier invalid for function %qs "
11269 "declared out of global scope", name
);
11272 if (ctype
== NULL_TREE
)
11276 error ("virtual non-class function %qs", name
);
11279 else if (sfk
== sfk_constructor
11280 || sfk
== sfk_destructor
)
11282 error (funcdef_flag
11283 ? G_("%qs defined in a non-class scope")
11284 : G_("%qs declared in a non-class scope"), name
);
11289 /* Record whether the function is public. */
11290 publicp
= (ctype
!= NULL_TREE
11291 || storage_class
!= sc_static
);
11293 if (late_return_type_p
)
11294 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
11296 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
11297 reqs
, virtualp
, flags
, memfn_quals
, rqual
, raises
,
11300 inlinep
| (2 * constexpr_p
) | (4 * concept_p
),
11301 initialized
== SD_DELETED
,
11304 template_count
, in_namespace
, attrlist
,
11305 declarator
->id_loc
);
11306 if (decl
== NULL_TREE
)
11307 return error_mark_node
;
11311 int invalid_static
= 0;
11313 /* Don't allow a static member function in a class, and forbid
11314 declaring main to be static. */
11315 if (TREE_CODE (type
) == METHOD_TYPE
)
11317 permerror (input_location
, "cannot declare member function %qD to have "
11318 "static linkage", decl
);
11319 invalid_static
= 1;
11321 else if (current_function_decl
)
11323 /* FIXME need arm citation */
11324 error ("cannot declare static function inside another function");
11325 invalid_static
= 1;
11328 if (invalid_static
)
11331 storage_class
= sc_none
;
11337 /* It's a variable. */
11339 /* An uninitialized decl with `extern' is a reference. */
11340 decl
= grokvardecl (type
, dname
, unqualified_id
,
11343 ((type_quals
& TYPE_QUAL_CONST
) != 0) | (2 * concept_p
),
11345 ctype
? ctype
: in_namespace
);
11346 if (decl
== NULL_TREE
)
11347 return error_mark_node
;
11349 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11350 memfn_quals
!= TYPE_UNQUALIFIED
,
11351 inlinep
, friendp
, raises
!= NULL_TREE
);
11355 DECL_CONTEXT (decl
) = ctype
;
11358 permerror (input_location
, "%<static%> may not be used when defining "
11359 "(as opposed to declaring) a static data member");
11361 storage_class
= sc_none
;
11363 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11365 error ("static member %qD declared %<register%>", decl
);
11366 storage_class
= sc_none
;
11368 if (storage_class
== sc_extern
&& pedantic
)
11370 pedwarn (input_location
, OPT_Wpedantic
,
11371 "cannot explicitly declare member %q#D to have "
11372 "extern linkage", decl
);
11373 storage_class
= sc_none
;
11376 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11378 error ("declaration of constexpr variable %qD is not a definition",
11380 constexpr_p
= false;
11384 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11386 if (toplevel_bindings_p ())
11388 /* It's common practice (and completely valid) to have a const
11389 be initialized and declared extern. */
11390 if (!(type_quals
& TYPE_QUAL_CONST
))
11391 warning (0, "%qs initialized and declared %<extern%>", name
);
11395 error ("%qs has both %<extern%> and initializer", name
);
11396 return error_mark_node
;
11400 /* Record `register' declaration for warnings on &
11401 and in case doing stupid register allocation. */
11403 if (storage_class
== sc_register
)
11404 DECL_REGISTER (decl
) = 1;
11405 else if (storage_class
== sc_extern
)
11406 DECL_THIS_EXTERN (decl
) = 1;
11407 else if (storage_class
== sc_static
)
11408 DECL_THIS_STATIC (decl
) = 1;
11410 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11411 if (constexpr_p
&& VAR_P (decl
))
11412 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11414 /* Record constancy and volatility on the DECL itself . There's
11415 no need to do this when processing a template; we'll do this
11416 for the instantiated declaration based on the type of DECL. */
11417 if (!processing_template_decl
)
11418 cp_apply_type_quals_to_decl (type_quals
, decl
);
11424 /* Subroutine of start_function. Ensure that each of the parameter
11425 types (as listed in PARMS) is complete, as is required for a
11426 function definition. */
11429 require_complete_types_for_parms (tree parms
)
11431 for (; parms
; parms
= DECL_CHAIN (parms
))
11433 if (dependent_type_p (TREE_TYPE (parms
)))
11435 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11436 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11438 relayout_decl (parms
);
11439 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11442 /* grokparms or complete_type_or_else will have already issued
11444 TREE_TYPE (parms
) = error_mark_node
;
11448 /* Returns nonzero if T is a local variable. */
11451 local_variable_p (const_tree t
)
11454 /* A VAR_DECL with a context that is a _TYPE is a static data
11456 && !TYPE_P (CP_DECL_CONTEXT (t
))
11457 /* Any other non-local variable must be at namespace scope. */
11458 && !DECL_NAMESPACE_SCOPE_P (t
))
11459 || (TREE_CODE (t
) == PARM_DECL
))
11465 /* Like local_variable_p, but suitable for use as a tree-walking
11469 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11472 if (local_variable_p (*tp
)
11473 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11475 else if (TYPE_P (*tp
))
11476 *walk_subtrees
= 0;
11481 /* Check that ARG, which is a default-argument expression for a
11482 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11483 something goes wrong. DECL may also be a _TYPE node, rather than a
11484 DECL, if there is no DECL available. */
11487 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11492 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11493 /* We get a DEFAULT_ARG when looking at an in-class declaration
11494 with a default argument. Ignore the argument for now; we'll
11495 deal with it after the class is complete. */
11504 decl_type
= TREE_TYPE (decl
);
11506 if (arg
== error_mark_node
11507 || decl
== error_mark_node
11508 || TREE_TYPE (arg
) == error_mark_node
11509 || decl_type
== error_mark_node
)
11510 /* Something already went wrong. There's no need to check
11512 return error_mark_node
;
11514 /* [dcl.fct.default]
11516 A default argument expression is implicitly converted to the
11518 ++cp_unevaluated_operand
;
11519 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11521 --cp_unevaluated_operand
;
11523 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
11525 if (TYPE_PTR_OR_PTRMEM_P (decl_type
)
11526 && null_ptr_cst_p (arg
))
11527 return nullptr_node
;
11529 /* [dcl.fct.default]
11531 Local variables shall not be used in default argument
11534 The keyword `this' shall not be used in a default argument of a
11535 member function. */
11536 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11539 if (complain
& tf_warning_or_error
)
11541 if (DECL_NAME (var
) == this_identifier
)
11542 permerror (input_location
, "default argument %qE uses %qD",
11545 error ("default argument %qE uses local variable %qD", arg
, var
);
11547 return error_mark_node
;
11554 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11557 type_is_deprecated (tree type
)
11559 enum tree_code code
;
11560 if (TREE_DEPRECATED (type
))
11562 if (TYPE_NAME (type
)
11563 && TREE_DEPRECATED (TYPE_NAME (type
)))
11566 /* Do warn about using typedefs to a deprecated class. */
11567 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11568 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11570 code
= TREE_CODE (type
);
11572 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11573 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11574 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11575 return type_is_deprecated (TREE_TYPE (type
));
11577 if (TYPE_PTRMEMFUNC_P (type
))
11578 return type_is_deprecated
11579 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11584 /* Decode the list of parameter types for a function type.
11585 Given the list of things declared inside the parens,
11586 return a list of types.
11588 If this parameter does not end with an ellipsis, we append
11591 *PARMS is set to the chain of PARM_DECLs created. */
11594 grokparms (tree parmlist
, tree
*parms
)
11596 tree result
= NULL_TREE
;
11597 tree decls
= NULL_TREE
;
11601 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11603 tree type
= NULL_TREE
;
11604 tree init
= TREE_PURPOSE (parm
);
11605 tree decl
= TREE_VALUE (parm
);
11606 const char *errmsg
;
11608 if (parm
== void_list_node
)
11611 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11614 type
= TREE_TYPE (decl
);
11615 if (VOID_TYPE_P (type
))
11617 if (same_type_p (type
, void_type_node
)
11619 && !DECL_NAME (decl
) && !result
11620 && TREE_CHAIN (parm
) == void_list_node
)
11621 /* DR 577: A parameter list consisting of a single
11622 unnamed parameter of non-dependent type 'void'. */
11624 else if (cv_qualified_p (type
))
11625 error_at (DECL_SOURCE_LOCATION (decl
),
11626 "invalid use of cv-qualified type %qT in "
11627 "parameter declaration", type
);
11629 error_at (DECL_SOURCE_LOCATION (decl
),
11630 "invalid use of type %<void%> in parameter "
11632 /* It's not a good idea to actually create parameters of
11633 type `void'; other parts of the compiler assume that a
11634 void type terminates the parameter list. */
11635 type
= error_mark_node
;
11636 TREE_TYPE (decl
) = error_mark_node
;
11639 if (type
!= error_mark_node
11640 && TYPE_FOR_JAVA (type
)
11641 && MAYBE_CLASS_TYPE_P (type
))
11643 error ("parameter %qD has Java class type", decl
);
11644 type
= error_mark_node
;
11645 TREE_TYPE (decl
) = error_mark_node
;
11649 if (type
!= error_mark_node
11650 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11653 type
= error_mark_node
;
11654 TREE_TYPE (decl
) = error_mark_node
;
11657 if (type
!= error_mark_node
)
11659 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11661 tree deptype
= type_is_deprecated (type
);
11663 warn_deprecated_use (deptype
, NULL_TREE
);
11666 /* Top-level qualifiers on the parameters are
11667 ignored for function types. */
11668 type
= cp_build_qualified_type (type
, 0);
11669 if (TREE_CODE (type
) == METHOD_TYPE
)
11671 error ("parameter %qD invalidly declared method type", decl
);
11672 type
= build_pointer_type (type
);
11673 TREE_TYPE (decl
) = type
;
11675 else if (abstract_virtuals_error (decl
, type
))
11676 any_error
= 1; /* Seems like a good idea. */
11677 else if (POINTER_TYPE_P (type
))
11679 /* [dcl.fct]/6, parameter types cannot contain pointers
11680 (references) to arrays of unknown bound. */
11681 tree t
= TREE_TYPE (type
);
11682 int ptr
= TYPE_PTR_P (type
);
11686 if (TYPE_PTR_P (t
))
11688 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11690 else if (!TYPE_DOMAIN (t
))
11694 if (TREE_CODE (t
) == ARRAY_TYPE
)
11696 ? G_("parameter %qD includes pointer to array of "
11697 "unknown bound %qT")
11698 : G_("parameter %qD includes reference to array of "
11699 "unknown bound %qT"),
11705 else if (init
&& !processing_template_decl
)
11706 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11709 DECL_CHAIN (decl
) = decls
;
11711 result
= tree_cons (init
, type
, result
);
11713 decls
= nreverse (decls
);
11714 result
= nreverse (result
);
11716 result
= chainon (result
, void_list_node
);
11723 /* D is a constructor or overloaded `operator='.
11725 Let T be the class in which D is declared. Then, this function
11728 -1 if D's is an ill-formed constructor or copy assignment operator
11729 whose first parameter is of type `T'.
11730 0 if D is not a copy constructor or copy assignment
11732 1 if D is a copy constructor or copy assignment operator whose
11733 first parameter is a reference to non-const qualified T.
11734 2 if D is a copy constructor or copy assignment operator whose
11735 first parameter is a reference to const qualified T.
11737 This function can be used as a predicate. Positive values indicate
11738 a copy constructor and nonzero values indicate a copy assignment
11742 copy_fn_p (const_tree d
)
11748 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11750 if (TREE_CODE (d
) == TEMPLATE_DECL
11751 || (DECL_TEMPLATE_INFO (d
)
11752 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11753 /* Instantiations of template member functions are never copy
11754 functions. Note that member functions of templated classes are
11755 represented as template functions internally, and we must
11756 accept those as copy functions. */
11759 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11763 arg_type
= TREE_VALUE (args
);
11764 if (arg_type
== error_mark_node
)
11767 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11769 /* Pass by value copy assignment operator. */
11772 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11773 && !TYPE_REF_IS_RVALUE (arg_type
)
11774 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11776 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11782 args
= TREE_CHAIN (args
);
11784 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11785 /* There are more non-optional args. */
11791 /* D is a constructor or overloaded `operator='.
11793 Let T be the class in which D is declared. Then, this function
11794 returns true when D is a move constructor or move assignment
11795 operator, false otherwise. */
11798 move_fn_p (const_tree d
)
11800 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11802 if (cxx_dialect
== cxx98
)
11803 /* There are no move constructors if we are in C++98 mode. */
11806 if (TREE_CODE (d
) == TEMPLATE_DECL
11807 || (DECL_TEMPLATE_INFO (d
)
11808 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11809 /* Instantiations of template member functions are never move
11810 functions. Note that member functions of templated classes are
11811 represented as template functions internally, and we must
11812 accept those as move functions. */
11815 return move_signature_fn_p (d
);
11818 /* D is a constructor or overloaded `operator='.
11820 Then, this function returns true when D has the same signature as a move
11821 constructor or move assignment operator (because either it is such a
11822 ctor/op= or it is a template specialization with the same signature),
11823 false otherwise. */
11826 move_signature_fn_p (const_tree d
)
11830 bool result
= false;
11832 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11836 arg_type
= TREE_VALUE (args
);
11837 if (arg_type
== error_mark_node
)
11840 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11841 && TYPE_REF_IS_RVALUE (arg_type
)
11842 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11846 args
= TREE_CHAIN (args
);
11848 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11849 /* There are more non-optional args. */
11855 /* Remember any special properties of member function DECL. */
11858 grok_special_member_properties (tree decl
)
11862 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11865 class_type
= DECL_CONTEXT (decl
);
11866 if (DECL_CONSTRUCTOR_P (decl
))
11868 int ctor
= copy_fn_p (decl
);
11870 if (!DECL_ARTIFICIAL (decl
))
11871 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11877 A non-template constructor for class X is a copy
11878 constructor if its first parameter is of type X&, const
11879 X&, volatile X& or const volatile X&, and either there
11880 are no other parameters or else all other parameters have
11881 default arguments. */
11882 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11883 if (user_provided_p (decl
))
11884 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11886 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11888 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11889 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11890 else if (move_fn_p (decl
) && user_provided_p (decl
))
11891 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11892 else if (is_list_ctor (decl
))
11893 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11895 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11896 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11897 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11899 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11903 A non-template assignment operator for class X is a copy
11904 assignment operator if its parameter is of type X, X&, const
11905 X&, volatile X& or const volatile X&. */
11907 int assop
= copy_fn_p (decl
);
11911 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11912 if (user_provided_p (decl
))
11913 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11915 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11917 else if (move_fn_p (decl
) && user_provided_p (decl
))
11918 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11920 /* Destructors are handled in check_methods. */
11923 /* Check a constructor DECL has the correct form. Complains
11924 if the class has a constructor of the form X(X). */
11927 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11929 int ctor_parm
= copy_fn_p (decl
);
11935 A declaration of a constructor for a class X is ill-formed if
11936 its first parameter is of type (optionally cv-qualified) X
11937 and either there are no other parameters or else all other
11938 parameters have default arguments.
11940 We *don't* complain about member template instantiations that
11941 have this form, though; they can occur as we try to decide
11942 what constructor to use during overload resolution. Since
11943 overload resolution will never prefer such a constructor to
11944 the non-template copy constructor (which is either explicitly
11945 or implicitly defined), there's no need to worry about their
11946 existence. Theoretically, they should never even be
11947 instantiated, but that's hard to forestall. */
11948 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11956 /* An operator with this code is unary, but can also be binary. */
11959 ambi_op_p (enum tree_code code
)
11961 return (code
== INDIRECT_REF
11962 || code
== ADDR_EXPR
11963 || code
== UNARY_PLUS_EXPR
11964 || code
== NEGATE_EXPR
11965 || code
== PREINCREMENT_EXPR
11966 || code
== PREDECREMENT_EXPR
);
11969 /* An operator with this name can only be unary. */
11972 unary_op_p (enum tree_code code
)
11974 return (code
== TRUTH_NOT_EXPR
11975 || code
== BIT_NOT_EXPR
11976 || code
== COMPONENT_REF
11977 || code
== TYPE_EXPR
);
11980 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11981 errors are issued for invalid declarations. */
11984 grok_op_properties (tree decl
, bool complain
)
11986 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11988 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11989 tree name
= DECL_NAME (decl
);
11990 enum tree_code operator_code
;
11995 /* Count the number of arguments and check for ellipsis. */
11996 for (argtype
= argtypes
, arity
= 0;
11997 argtype
&& argtype
!= void_list_node
;
11998 argtype
= TREE_CHAIN (argtype
))
12000 ellipsis_p
= !argtype
;
12002 class_type
= DECL_CONTEXT (decl
);
12003 if (class_type
&& !CLASS_TYPE_P (class_type
))
12004 class_type
= NULL_TREE
;
12006 if (DECL_CONV_FN_P (decl
))
12007 operator_code
= TYPE_EXPR
;
12011 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
12012 if (ansi_opname (CODE) == name) \
12014 operator_code = (CODE); \
12017 else if (ansi_assopname (CODE) == name) \
12019 operator_code = (CODE); \
12020 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
12024 #include "operators.def"
12025 #undef DEF_OPERATOR
12027 gcc_unreachable ();
12030 gcc_assert (operator_code
!= MAX_TREE_CODES
);
12031 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
12034 switch (operator_code
)
12037 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
12041 TYPE_GETS_DELETE (class_type
) |= 1;
12045 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
12048 case VEC_DELETE_EXPR
:
12049 TYPE_GETS_DELETE (class_type
) |= 2;
12056 /* [basic.std.dynamic.allocation]/1:
12058 A program is ill-formed if an allocation function is declared
12059 in a namespace scope other than global scope or declared static
12062 The same also holds true for deallocation functions. */
12063 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
12064 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
12066 if (DECL_NAMESPACE_SCOPE_P (decl
))
12068 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
12070 error ("%qD may not be declared within a namespace", decl
);
12073 else if (!TREE_PUBLIC (decl
))
12075 error ("%qD may not be declared as static", decl
);
12081 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
12083 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
12084 DECL_IS_OPERATOR_NEW (decl
) = 1;
12086 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
12087 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
12090 /* An operator function must either be a non-static member function
12091 or have at least one parameter of a class, a reference to a class,
12092 an enumeration, or a reference to an enumeration. 13.4.0.6 */
12093 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
12095 if (operator_code
== TYPE_EXPR
12096 || operator_code
== CALL_EXPR
12097 || operator_code
== COMPONENT_REF
12098 || operator_code
== ARRAY_REF
12099 || operator_code
== NOP_EXPR
)
12101 error ("%qD must be a nonstatic member function", decl
);
12108 if (DECL_STATIC_FUNCTION_P (decl
))
12110 error ("%qD must be either a non-static member "
12111 "function or a non-member function", decl
);
12115 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
12117 tree arg
= non_reference (TREE_VALUE (p
));
12118 if (arg
== error_mark_node
)
12121 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
12122 because these checks are performed even on
12123 template functions. */
12124 if (MAYBE_CLASS_TYPE_P (arg
)
12125 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
12129 if (!p
|| p
== void_list_node
)
12132 error ("%qD must have an argument of class or "
12133 "enumerated type", decl
);
12139 /* There are no restrictions on the arguments to an overloaded
12141 if (operator_code
== CALL_EXPR
)
12144 /* Warn about conversion operators that will never be used. */
12145 if (IDENTIFIER_TYPENAME_P (name
)
12146 && ! DECL_TEMPLATE_INFO (decl
)
12148 /* Warn only declaring the function; there is no need to
12149 warn again about out-of-class definitions. */
12150 && class_type
== current_class_type
)
12152 tree t
= TREE_TYPE (name
);
12153 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
12156 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
12158 if (VOID_TYPE_P (t
))
12159 warning (OPT_Wconversion
,
12161 ? G_("conversion to a reference to void "
12162 "will never use a type conversion operator")
12163 : G_("conversion to void "
12164 "will never use a type conversion operator"));
12165 else if (class_type
)
12167 if (t
== class_type
)
12168 warning (OPT_Wconversion
,
12170 ? G_("conversion to a reference to the same type "
12171 "will never use a type conversion operator")
12172 : G_("conversion to the same type "
12173 "will never use a type conversion operator"));
12174 /* Don't force t to be complete here. */
12175 else if (MAYBE_CLASS_TYPE_P (t
)
12176 && COMPLETE_TYPE_P (t
)
12177 && DERIVED_FROM_P (t
, class_type
))
12178 warning (OPT_Wconversion
,
12180 ? G_("conversion to a reference to a base class "
12181 "will never use a type conversion operator")
12182 : G_("conversion to a base class "
12183 "will never use a type conversion operator"));
12188 if (operator_code
== COND_EXPR
)
12191 error ("ISO C++ prohibits overloading operator ?:");
12194 else if (ellipsis_p
)
12196 error ("%qD must not have variable number of arguments", decl
);
12199 else if (ambi_op_p (operator_code
))
12202 /* We pick the one-argument operator codes by default, so
12203 we don't have to change anything. */
12205 else if (arity
== 2)
12207 /* If we thought this was a unary operator, we now know
12208 it to be a binary operator. */
12209 switch (operator_code
)
12212 operator_code
= MULT_EXPR
;
12216 operator_code
= BIT_AND_EXPR
;
12219 case UNARY_PLUS_EXPR
:
12220 operator_code
= PLUS_EXPR
;
12224 operator_code
= MINUS_EXPR
;
12227 case PREINCREMENT_EXPR
:
12228 operator_code
= POSTINCREMENT_EXPR
;
12231 case PREDECREMENT_EXPR
:
12232 operator_code
= POSTDECREMENT_EXPR
;
12236 gcc_unreachable ();
12239 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
12241 if ((operator_code
== POSTINCREMENT_EXPR
12242 || operator_code
== POSTDECREMENT_EXPR
)
12243 && ! processing_template_decl
12244 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
12247 error ("postfix %qD must take %<int%> as its argument",
12250 error ("postfix %qD must take %<int%> as its second "
12258 error ("%qD must take either zero or one argument", decl
);
12260 error ("%qD must take either one or two arguments", decl
);
12264 /* More Effective C++ rule 6. */
12266 && (operator_code
== POSTINCREMENT_EXPR
12267 || operator_code
== POSTDECREMENT_EXPR
12268 || operator_code
== PREINCREMENT_EXPR
12269 || operator_code
== PREDECREMENT_EXPR
))
12271 tree arg
= TREE_VALUE (argtypes
);
12272 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
12273 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
12274 arg
= TREE_TYPE (arg
);
12275 arg
= TYPE_MAIN_VARIANT (arg
);
12276 if (operator_code
== PREINCREMENT_EXPR
12277 || operator_code
== PREDECREMENT_EXPR
)
12279 if (TREE_CODE (ret
) != REFERENCE_TYPE
12280 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
12282 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
12283 build_reference_type (arg
));
12287 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
12288 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
12292 else if (unary_op_p (operator_code
))
12297 error ("%qD must take %<void%>", decl
);
12299 error ("%qD must take exactly one argument", decl
);
12303 else /* if (binary_op_p (operator_code)) */
12308 error ("%qD must take exactly one argument", decl
);
12310 error ("%qD must take exactly two arguments", decl
);
12314 /* More Effective C++ rule 7. */
12316 && (operator_code
== TRUTH_ANDIF_EXPR
12317 || operator_code
== TRUTH_ORIF_EXPR
12318 || operator_code
== COMPOUND_EXPR
))
12319 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12323 /* Effective C++ rule 23. */
12326 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12327 && (operator_code
== PLUS_EXPR
12328 || operator_code
== MINUS_EXPR
12329 || operator_code
== TRUNC_DIV_EXPR
12330 || operator_code
== MULT_EXPR
12331 || operator_code
== TRUNC_MOD_EXPR
)
12332 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12333 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12335 /* [over.oper]/8 */
12336 for (; argtypes
&& argtypes
!= void_list_node
;
12337 argtypes
= TREE_CHAIN (argtypes
))
12338 if (TREE_PURPOSE (argtypes
))
12340 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12341 if (operator_code
== POSTINCREMENT_EXPR
12342 || operator_code
== POSTDECREMENT_EXPR
)
12344 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12349 error ("%qD cannot have default arguments", decl
);
12357 /* Return a string giving the keyword associate with CODE. */
12359 static const char *
12360 tag_name (enum tag_types code
)
12372 case typename_type
:
12375 gcc_unreachable ();
12379 /* Name lookup in an elaborated-type-specifier (after the keyword
12380 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12381 elaborated-type-specifier is invalid, issue a diagnostic and return
12382 error_mark_node; otherwise, return the *_TYPE to which it referred.
12383 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12386 check_elaborated_type_specifier (enum tag_types tag_code
,
12388 bool allow_template_p
)
12394 struct S { struct S *p; };
12396 name lookup will find the TYPE_DECL for the implicit "S::S"
12397 typedef. Adjust for that here. */
12398 if (DECL_SELF_REFERENCE_P (decl
))
12399 decl
= TYPE_NAME (TREE_TYPE (decl
));
12401 type
= TREE_TYPE (decl
);
12403 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12404 is false for this case as well. */
12405 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12407 error ("using template type parameter %qT after %qs",
12408 type
, tag_name (tag_code
));
12409 return error_mark_node
;
12411 /* Accept template template parameters. */
12412 else if (allow_template_p
12413 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12414 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12418 If the identifier resolves to a typedef-name or the
12419 simple-template-id resolves to an alias template
12420 specialization, the elaborated-type-specifier is ill-formed.
12422 In other words, the only legitimate declaration to use in the
12423 elaborated type specifier is the implicit typedef created when
12424 the type is declared. */
12425 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12426 && !DECL_SELF_REFERENCE_P (decl
)
12427 && tag_code
!= typename_type
)
12429 if (alias_template_specialization_p (type
))
12430 error ("using alias template specialization %qT after %qs",
12431 type
, tag_name (tag_code
));
12433 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12434 inform (DECL_SOURCE_LOCATION (decl
),
12435 "%qD has a previous declaration here", decl
);
12436 return error_mark_node
;
12438 else if (TREE_CODE (type
) != RECORD_TYPE
12439 && TREE_CODE (type
) != UNION_TYPE
12440 && tag_code
!= enum_type
12441 && tag_code
!= typename_type
)
12443 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12444 inform (input_location
, "%q+T has a previous declaration here", type
);
12445 return error_mark_node
;
12447 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12448 && tag_code
== enum_type
)
12450 error ("%qT referred to as enum", type
);
12451 inform (input_location
, "%q+T has a previous declaration here", type
);
12452 return error_mark_node
;
12454 else if (!allow_template_p
12455 && TREE_CODE (type
) == RECORD_TYPE
12456 && CLASSTYPE_IS_TEMPLATE (type
))
12458 /* If a class template appears as elaborated type specifier
12459 without a template header such as:
12461 template <class T> class C {};
12462 void f(class C); // No template header here
12464 then the required template argument is missing. */
12465 error ("template argument required for %<%s %T%>",
12466 tag_name (tag_code
),
12467 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12468 return error_mark_node
;
12474 /* Lookup NAME in elaborate type specifier in scope according to
12475 SCOPE and issue diagnostics if necessary.
12476 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12477 found, and ERROR_MARK_NODE for type error. */
12480 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12481 tag_scope scope
, bool template_header_p
)
12485 if (scope
== ts_global
)
12487 /* First try ordinary name lookup, ignoring hidden class name
12488 injected via friend declaration. */
12489 decl
= lookup_name_prefer_type (name
, 2);
12490 decl
= strip_using_decl (decl
);
12491 /* If that fails, the name will be placed in the smallest
12492 non-class, non-function-prototype scope according to 3.3.1/5.
12493 We may already have a hidden name declared as friend in this
12494 scope. So lookup again but not ignoring hidden names.
12495 If we find one, that name will be made visible rather than
12496 creating a new tag. */
12498 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12501 decl
= lookup_type_scope (name
, scope
);
12504 && (DECL_CLASS_TEMPLATE_P (decl
)
12505 /* If scope is ts_current we're defining a class, so ignore a
12506 template template parameter. */
12507 || (scope
!= ts_current
12508 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12509 decl
= DECL_TEMPLATE_RESULT (decl
);
12511 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12513 /* Look for invalid nested type:
12517 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12519 error ("%qD has the same name as the class in which it is "
12522 return error_mark_node
;
12525 /* Two cases we need to consider when deciding if a class
12526 template is allowed as an elaborated type specifier:
12527 1. It is a self reference to its own class.
12528 2. It comes with a template header.
12532 template <class T> class C {
12533 class C *c1; // DECL_SELF_REFERENCE_P is true
12536 template <class U> class C; // template_header_p is true
12537 template <class T> class C<T>::D {
12538 class C *c2; // DECL_SELF_REFERENCE_P is true
12541 t
= check_elaborated_type_specifier (tag_code
,
12544 | DECL_SELF_REFERENCE_P (decl
));
12547 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12549 error ("reference to %qD is ambiguous", name
);
12550 print_candidates (decl
);
12551 return error_mark_node
;
12557 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12558 Define the tag as a forward-reference if it is not defined.
12560 If a declaration is given, process it here, and report an error if
12561 multiple declarations are not identical.
12563 SCOPE is TS_CURRENT when this is also a definition. Only look in
12564 the current frame for the name (since C++ allows new names in any
12565 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12566 declaration. Only look beginning from the current scope outward up
12567 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12569 TEMPLATE_HEADER_P is true when this declaration is preceded by
12570 a set of template parameters. */
12573 xref_tag_1 (enum tag_types tag_code
, tree name
,
12574 tag_scope orig_scope
, bool template_header_p
)
12576 enum tree_code code
;
12578 tree context
= NULL_TREE
;
12581 gcc_assert (identifier_p (name
));
12587 code
= RECORD_TYPE
;
12593 code
= ENUMERAL_TYPE
;
12596 gcc_unreachable ();
12599 if (orig_scope
== ts_lambda
)
12600 scope
= ts_current
;
12602 scope
= orig_scope
;
12604 /* In case of anonymous name, xref_tag is only called to
12605 make type node and push name. Name lookup is not required. */
12606 if (anon_aggrname_p (name
))
12609 t
= lookup_and_check_tag (tag_code
, name
,
12610 scope
, template_header_p
);
12612 if (t
== error_mark_node
)
12613 return error_mark_node
;
12615 if (scope
!= ts_current
&& t
&& current_class_type
12616 && template_class_depth (current_class_type
)
12617 && template_header_p
)
12619 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12622 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12623 definition of this tag. Since, in addition, we are currently
12624 processing a (member) template declaration of a template
12625 class, we must be very careful; consider:
12632 { template <class V>
12633 friend struct S1; };
12635 Here, the S2::S1 declaration should not be confused with the
12636 outer declaration. In particular, the inner version should
12637 have a template parameter of level 2, not level 1. This
12638 would be particularly important if the member declaration
12641 template <class V = U> friend struct S1;
12643 say, when we should tsubst into `U' when instantiating
12644 S2. On the other hand, when presented with:
12654 we must find the inner binding eventually. We
12655 accomplish this by making sure that the new type we
12656 create to represent this declaration has the right
12658 context
= TYPE_CONTEXT (t
);
12664 /* If no such tag is yet defined, create a forward-reference node
12665 and record it as the "definition".
12666 When a real declaration of this type is found,
12667 the forward-reference will be altered into a real type. */
12668 if (code
== ENUMERAL_TYPE
)
12670 error ("use of enum %q#D without previous declaration", name
);
12671 return error_mark_node
;
12675 t
= make_class_type (code
);
12676 TYPE_CONTEXT (t
) = context
;
12677 if (orig_scope
== ts_lambda
)
12678 /* Remember that we're declaring a lambda to avoid bogus errors
12679 in push_template_decl. */
12680 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12681 t
= pushtag (name
, t
, scope
);
12686 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12688 /* Check that we aren't trying to overload a class with different
12690 tree constr
= NULL_TREE
;
12691 if (current_template_parms
)
12693 tree reqs
= TEMPLATE_PARMS_CONSTRAINTS (current_template_parms
);
12694 constr
= build_constraints (reqs
, NULL_TREE
);
12696 if (!redeclare_class_template (t
, current_template_parms
, constr
))
12697 return error_mark_node
;
12699 else if (!processing_template_decl
12700 && CLASS_TYPE_P (t
)
12701 && CLASSTYPE_IS_TEMPLATE (t
))
12703 error ("redeclaration of %qT as a non-template", t
);
12704 error ("previous declaration %q+D", t
);
12705 return error_mark_node
;
12708 /* Make injected friend class visible. */
12709 if (scope
!= ts_within_enclosing_non_class
12710 && hidden_name_p (TYPE_NAME (t
)))
12712 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12713 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12715 if (TYPE_TEMPLATE_INFO (t
))
12717 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12718 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12726 /* Wrapper for xref_tag_1. */
12729 xref_tag (enum tag_types tag_code
, tree name
,
12730 tag_scope scope
, bool template_header_p
)
12734 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12735 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12736 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12742 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12744 enum tag_types tag_kind
;
12746 if (TREE_CODE (old
) == RECORD_TYPE
)
12747 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12749 tag_kind
= union_type
;
12751 if (id
== NULL_TREE
)
12752 id
= TYPE_IDENTIFIER (old
);
12754 return xref_tag (tag_kind
, id
, scope
, false);
12757 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12758 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12759 access_* node, and the TREE_VALUE is the type of the base-class.
12760 Non-NULL TREE_TYPE indicates virtual inheritance.
12762 Returns true if the binfo hierarchy was successfully created,
12763 false if an error was detected. */
12766 xref_basetypes (tree ref
, tree base_list
)
12769 tree binfo
, base_binfo
;
12770 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12771 unsigned max_bases
= 0; /* Maximum direct bases. */
12772 unsigned max_dvbases
= 0; /* Maximum direct virtual bases. */
12774 tree default_access
;
12775 tree igo_prev
; /* Track Inheritance Graph Order. */
12777 if (ref
== error_mark_node
)
12780 /* The base of a derived class is private by default, all others are
12782 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12783 && CLASSTYPE_DECLARED_CLASS (ref
)
12784 ? access_private_node
: access_public_node
);
12786 /* First, make sure that any templates in base-classes are
12787 instantiated. This ensures that if we call ourselves recursively
12788 we do not get confused about which classes are marked and which
12790 basep
= &base_list
;
12793 tree basetype
= TREE_VALUE (*basep
);
12795 /* The dependent_type_p call below should really be dependent_scope_p
12796 so that we give a hard error about using an incomplete type as a
12797 base, but we allow it with a pedwarn for backward
12799 if (processing_template_decl
12800 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12801 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12802 if (!dependent_type_p (basetype
)
12803 && !complete_type_or_else (basetype
, NULL
))
12804 /* An incomplete type. Remove it from the list. */
12805 *basep
= TREE_CHAIN (*basep
);
12809 if (TREE_TYPE (*basep
))
12811 if (CLASS_TYPE_P (basetype
))
12812 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12813 basep
= &TREE_CHAIN (*basep
);
12816 max_vbases
+= max_dvbases
;
12818 TYPE_MARKED_P (ref
) = 1;
12820 /* The binfo slot should be empty, unless this is an (ill-formed)
12822 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12824 error ("redefinition of %q#T", ref
);
12828 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12830 binfo
= make_tree_binfo (max_bases
);
12832 TYPE_BINFO (ref
) = binfo
;
12833 BINFO_OFFSET (binfo
) = size_zero_node
;
12834 BINFO_TYPE (binfo
) = ref
;
12836 /* Apply base-class info set up to the variants of this type. */
12837 fixup_type_variants (ref
);
12841 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12842 /* An aggregate cannot have baseclasses. */
12843 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12845 if (TREE_CODE (ref
) == UNION_TYPE
)
12847 error ("derived union %qT invalid", ref
);
12854 if (TYPE_FOR_JAVA (ref
))
12856 error ("Java class %qT cannot have multiple bases", ref
);
12860 warning (OPT_Wmultiple_inheritance
,
12861 "%qT defined with multiple direct bases", ref
);
12866 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12868 if (TYPE_FOR_JAVA (ref
))
12870 error ("Java class %qT cannot have virtual bases", ref
);
12873 else if (max_dvbases
)
12874 warning (OPT_Wvirtual_inheritance
,
12875 "%qT defined with direct virtual base", ref
);
12878 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12880 tree access
= TREE_PURPOSE (base_list
);
12881 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12882 tree basetype
= TREE_VALUE (base_list
);
12884 if (access
== access_default_node
)
12885 access
= default_access
;
12887 if (PACK_EXPANSION_P (basetype
))
12888 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12889 if (TREE_CODE (basetype
) == TYPE_DECL
)
12890 basetype
= TREE_TYPE (basetype
);
12891 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12893 error ("base type %qT fails to be a struct or class type",
12898 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12899 TYPE_FOR_JAVA (ref
) = 1;
12901 base_binfo
= NULL_TREE
;
12902 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12904 base_binfo
= TYPE_BINFO (basetype
);
12905 /* The original basetype could have been a typedef'd type. */
12906 basetype
= BINFO_TYPE (base_binfo
);
12908 /* Inherit flags from the base. */
12909 TYPE_HAS_NEW_OPERATOR (ref
)
12910 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12911 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12912 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12913 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12914 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12915 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12916 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12917 CLASSTYPE_REPEATED_BASE_P (ref
)
12918 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12921 /* We must do this test after we've seen through a typedef
12923 if (TYPE_MARKED_P (basetype
))
12925 if (basetype
== ref
)
12926 error ("recursive type %qT undefined", basetype
);
12928 error ("duplicate base type %qT invalid", basetype
);
12932 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12933 /* Regenerate the pack expansion for the bases. */
12934 basetype
= make_pack_expansion (basetype
);
12936 TYPE_MARKED_P (basetype
) = 1;
12938 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12939 &igo_prev
, via_virtual
);
12940 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12941 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12943 BINFO_BASE_APPEND (binfo
, base_binfo
);
12944 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12947 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12948 /* If we didn't get max_vbases vbases, we must have shared at
12949 least one of them, and are therefore diamond shaped. */
12950 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12952 /* Unmark all the types. */
12953 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12954 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12955 TYPE_MARKED_P (ref
) = 0;
12957 /* Now see if we have a repeated base type. */
12958 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12960 for (base_binfo
= binfo
; base_binfo
;
12961 base_binfo
= TREE_CHAIN (base_binfo
))
12963 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12965 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12968 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12970 for (base_binfo
= binfo
; base_binfo
;
12971 base_binfo
= TREE_CHAIN (base_binfo
))
12972 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12973 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12982 /* Copies the enum-related properties from type SRC to type DST.
12983 Used with the underlying type of an enum and the enum itself. */
12985 copy_type_enum (tree dst
, tree src
)
12988 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12990 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12991 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12992 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12993 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12994 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12995 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12996 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12997 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12998 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
13002 /* Begin compiling the definition of an enumeration type.
13005 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
13007 UNDERLYING_TYPE is the type that will be used as the storage for
13008 the enumeration type. This should be NULL_TREE if no storage type
13011 SCOPED_ENUM_P is true if this is a scoped enumeration type.
13013 if IS_NEW is not NULL, gets TRUE iff a new type is created.
13015 Returns the type object, as yet incomplete.
13016 Also records info about it so that build_enumerator
13017 may be used to declare the individual values as they are read. */
13020 start_enum (tree name
, tree enumtype
, tree underlying_type
,
13021 bool scoped_enum_p
, bool *is_new
)
13023 tree prevtype
= NULL_TREE
;
13024 gcc_assert (identifier_p (name
));
13028 /* [C++0x dcl.enum]p5:
13030 If not explicitly specified, the underlying type of a scoped
13031 enumeration type is int. */
13032 if (!underlying_type
&& scoped_enum_p
)
13033 underlying_type
= integer_type_node
;
13035 if (underlying_type
)
13036 underlying_type
= cv_unqualified (underlying_type
);
13038 /* If this is the real definition for a previous forward reference,
13039 fill in the contents in the same object that used to be the
13040 forward reference. */
13042 enumtype
= lookup_and_check_tag (enum_type
, name
,
13043 /*tag_scope=*/ts_current
,
13044 /*template_header_p=*/false);
13046 /* In case of a template_decl, the only check that should be deferred
13047 to instantiation time is the comparison of underlying types. */
13048 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
13050 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
13052 error_at (input_location
, "scoped/unscoped mismatch "
13053 "in enum %q#T", enumtype
);
13054 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
13055 "previous definition here");
13056 enumtype
= error_mark_node
;
13058 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
13060 error_at (input_location
, "underlying type mismatch "
13061 "in enum %q#T", enumtype
);
13062 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
13063 "previous definition here");
13064 enumtype
= error_mark_node
;
13066 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
13067 && !dependent_type_p (underlying_type
)
13068 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
13069 && !same_type_p (underlying_type
,
13070 ENUM_UNDERLYING_TYPE (enumtype
)))
13072 error_at (input_location
, "different underlying type "
13073 "in enum %q#T", enumtype
);
13074 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
13075 "previous definition here");
13076 underlying_type
= NULL_TREE
;
13080 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
13081 || processing_template_decl
)
13083 /* In case of error, make a dummy enum to allow parsing to
13085 if (enumtype
== error_mark_node
)
13087 name
= make_anon_name ();
13088 enumtype
= NULL_TREE
;
13091 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
13092 of an opaque enum, or an opaque enum of an already defined
13093 enumeration (C++0x only).
13094 In any other case, it'll be NULL_TREE. */
13100 prevtype
= enumtype
;
13102 /* Do not push the decl more than once, unless we need to
13103 compare underlying types at instantiation time */
13105 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
13106 || (underlying_type
13107 && dependent_type_p (underlying_type
))
13108 || (ENUM_UNDERLYING_TYPE (enumtype
)
13109 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
13111 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
13112 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
13115 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
13118 if (enumtype
== error_mark_node
)
13119 return error_mark_node
;
13121 /* The enum is considered opaque until the opening '{' of the
13122 enumerator list. */
13123 SET_OPAQUE_ENUM_P (enumtype
, true);
13124 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
13127 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
13129 if (underlying_type
)
13131 if (CP_INTEGRAL_TYPE_P (underlying_type
))
13133 copy_type_enum (enumtype
, underlying_type
);
13134 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
13136 else if (dependent_type_p (underlying_type
))
13137 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
13139 error ("underlying type %<%T%> of %<%T%> must be an integral type",
13140 underlying_type
, enumtype
);
13143 /* If into a template class, the returned enum is always the first
13144 declaration (opaque or not) seen. This way all the references to
13145 this type will be to the same declaration. The following ones are used
13146 only to check for definition errors. */
13147 if (prevtype
&& processing_template_decl
)
13153 /* After processing and defining all the values of an enumeration type,
13154 install their decls in the enumeration type.
13155 ENUMTYPE is the type object. */
13158 finish_enum_value_list (tree enumtype
)
13161 tree underlying_type
;
13164 tree minnode
, maxnode
;
13167 bool fixed_underlying_type_p
13168 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
13170 /* We built up the VALUES in reverse order. */
13171 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
13173 /* For an enum defined in a template, just set the type of the values;
13174 all further processing is postponed until the template is
13175 instantiated. We need to set the type so that tsubst of a CONST_DECL
13177 if (processing_template_decl
)
13179 for (values
= TYPE_VALUES (enumtype
);
13181 values
= TREE_CHAIN (values
))
13182 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
13186 /* Determine the minimum and maximum values of the enumerators. */
13187 if (TYPE_VALUES (enumtype
))
13189 minnode
= maxnode
= NULL_TREE
;
13191 for (values
= TYPE_VALUES (enumtype
);
13193 values
= TREE_CHAIN (values
))
13195 decl
= TREE_VALUE (values
);
13197 /* [dcl.enum]: Following the closing brace of an enum-specifier,
13198 each enumerator has the type of its enumeration. Prior to the
13199 closing brace, the type of each enumerator is the type of its
13200 initializing value. */
13201 TREE_TYPE (decl
) = enumtype
;
13203 /* Update the minimum and maximum values, if appropriate. */
13204 value
= DECL_INITIAL (decl
);
13205 if (value
== error_mark_node
)
13206 value
= integer_zero_node
;
13207 /* Figure out what the minimum and maximum values of the
13208 enumerators are. */
13210 minnode
= maxnode
= value
;
13211 else if (tree_int_cst_lt (maxnode
, value
))
13213 else if (tree_int_cst_lt (value
, minnode
))
13220 If the enumerator-list is empty, the underlying type is as if
13221 the enumeration had a single enumerator with value 0. */
13222 minnode
= maxnode
= integer_zero_node
;
13224 if (!fixed_underlying_type_p
)
13226 /* Compute the number of bits require to represent all values of the
13227 enumeration. We must do this before the type of MINNODE and
13228 MAXNODE are transformed, since tree_int_cst_min_precision relies
13229 on the TREE_TYPE of the value it is passed. */
13230 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
13231 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
13232 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
13233 int precision
= MAX (lowprec
, highprec
);
13235 bool use_short_enum
;
13237 /* Determine the underlying type of the enumeration.
13241 The underlying type of an enumeration is an integral type that
13242 can represent all the enumerator values defined in the
13243 enumeration. It is implementation-defined which integral type is
13244 used as the underlying type for an enumeration except that the
13245 underlying type shall not be larger than int unless the value of
13246 an enumerator cannot fit in an int or unsigned int.
13248 We use "int" or an "unsigned int" as the underlying type, even if
13249 a smaller integral type would work, unless the user has
13250 explicitly requested that we use the smallest possible type. The
13251 user can request that for all enumerations with a command line
13252 flag, or for just one enumeration with an attribute. */
13254 use_short_enum
= flag_short_enums
13255 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
13257 for (itk
= (use_short_enum
? itk_char
: itk_int
);
13261 underlying_type
= integer_types
[itk
];
13262 if (underlying_type
!= NULL_TREE
13263 && TYPE_PRECISION (underlying_type
) >= precision
13264 && TYPE_SIGN (underlying_type
) == sgn
)
13267 if (itk
== itk_none
)
13271 IF no integral type can represent all the enumerator values, the
13272 enumeration is ill-formed. */
13273 error ("no integral type can represent all of the enumerator values "
13274 "for %qT", enumtype
);
13275 precision
= TYPE_PRECISION (long_long_integer_type_node
);
13276 underlying_type
= integer_types
[itk_unsigned_long_long
];
13281 The value of sizeof() applied to an enumeration type, an object
13282 of an enumeration type, or an enumerator, is the value of sizeof()
13283 applied to the underlying type. */
13284 copy_type_enum (enumtype
, underlying_type
);
13286 /* Compute the minimum and maximum values for the type.
13290 For an enumeration where emin is the smallest enumerator and emax
13291 is the largest, the values of the enumeration are the values of the
13292 underlying type in the range bmin to bmax, where bmin and bmax are,
13293 respectively, the smallest and largest values of the smallest bit-
13294 field that can store emin and emax. */
13296 /* The middle-end currently assumes that types with TYPE_PRECISION
13297 narrower than their underlying type are suitably zero or sign
13298 extended to fill their mode. Similarly, it assumes that the front
13299 end assures that a value of a particular type must be within
13300 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
13302 We used to set these fields based on bmin and bmax, but that led
13303 to invalid assumptions like optimizing away bounds checking. So
13304 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
13305 TYPE_MAX_VALUE to the values for the mode above and only restrict
13306 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
13307 ENUM_UNDERLYING_TYPE (enumtype
)
13308 = build_distinct_type_copy (underlying_type
);
13309 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
13310 set_min_and_max_values_for_integral_type
13311 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
13313 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
13314 if (flag_strict_enums
)
13315 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
13318 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
13320 /* Convert each of the enumerators to the type of the underlying
13321 type of the enumeration. */
13322 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
13324 location_t saved_location
;
13326 decl
= TREE_VALUE (values
);
13327 saved_location
= input_location
;
13328 input_location
= DECL_SOURCE_LOCATION (decl
);
13329 if (fixed_underlying_type_p
)
13330 /* If the enumeration type has a fixed underlying type, we
13331 already checked all of the enumerator values. */
13332 value
= DECL_INITIAL (decl
);
13334 value
= perform_implicit_conversion (underlying_type
,
13335 DECL_INITIAL (decl
),
13336 tf_warning_or_error
);
13337 input_location
= saved_location
;
13339 /* Do not clobber shared ints. */
13340 value
= copy_node (value
);
13342 TREE_TYPE (value
) = enumtype
;
13343 DECL_INITIAL (decl
) = value
;
13346 /* Fix up all variant types of this enum type. */
13347 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13348 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13350 if (at_class_scope_p ()
13351 && COMPLETE_TYPE_P (current_class_type
)
13352 && UNSCOPED_ENUM_P (enumtype
))
13353 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13354 current_class_type
);
13356 /* Finish debugging output for this type. */
13357 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13360 /* Finishes the enum type. This is called only the first time an
13361 enumeration is seen, be it opaque or odinary.
13362 ENUMTYPE is the type object. */
13365 finish_enum (tree enumtype
)
13367 if (processing_template_decl
)
13369 if (at_function_scope_p ())
13370 add_stmt (build_min (TAG_DEFN
, enumtype
));
13374 /* If this is a forward declaration, there should not be any variants,
13375 though we can get a variant in the middle of an enum-specifier with
13376 wacky code like 'enum E { e = sizeof(const E*) };' */
13377 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13378 && (TYPE_VALUES (enumtype
)
13379 || !TYPE_NEXT_VARIANT (enumtype
)));
13382 /* Build and install a CONST_DECL for an enumeration constant of the
13383 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13384 Apply ATTRIBUTES if available. LOC is the location of NAME.
13385 Assignment of sequential values by default is handled here. */
13388 build_enumerator (tree name
, tree value
, tree enumtype
, tree attributes
,
13395 /* scalar_constant_value will pull out this expression, so make sure
13396 it's folded as appropriate. */
13397 if (processing_template_decl
)
13398 value
= fold_non_dependent_expr (value
);
13400 /* If the VALUE was erroneous, pretend it wasn't there; that will
13401 result in the enum being assigned the next value in sequence. */
13402 if (value
== error_mark_node
)
13405 /* Remove no-op casts from the value. */
13407 STRIP_TYPE_NOPS (value
);
13409 if (! processing_template_decl
)
13411 /* Validate and default VALUE. */
13412 if (value
!= NULL_TREE
)
13414 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13416 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13421 else if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
13422 (TREE_TYPE (value
)))
13423 value
= perform_implicit_conversion_flags
13424 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13425 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13427 if (value
== error_mark_node
)
13430 if (value
!= NULL_TREE
)
13432 value
= cxx_constant_value (value
);
13434 if (TREE_CODE (value
) != INTEGER_CST
13435 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13437 error ("enumerator value for %qD is not an integer constant",
13444 /* Default based on previous value. */
13445 if (value
== NULL_TREE
)
13447 if (TYPE_VALUES (enumtype
))
13452 /* C++03 7.2/4: If no initializer is specified for the first
13453 enumerator, the type is an unspecified integral
13454 type. Otherwise the type is the same as the type of the
13455 initializing value of the preceding enumerator unless the
13456 incremented value is not representable in that type, in
13457 which case the type is an unspecified integral type
13458 sufficient to contain the incremented value. */
13459 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13460 if (error_operand_p (prev_value
))
13461 value
= error_mark_node
;
13464 tree type
= TREE_TYPE (prev_value
);
13465 signop sgn
= TYPE_SIGN (type
);
13466 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13470 bool pos
= !wi::neg_p (wi
, sgn
);
13471 if (!wi::fits_to_tree_p (wi
, type
))
13474 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13476 type
= integer_types
[itk
];
13477 if (type
!= NULL_TREE
13478 && (pos
|| !TYPE_UNSIGNED (type
))
13479 && wi::fits_to_tree_p (wi
, type
))
13482 if (type
&& cxx_dialect
< cxx11
13483 && itk
> itk_unsigned_long
)
13484 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13485 incremented enumerator value is too large for %<unsigned long%>" : "\
13486 incremented enumerator value is too large for %<long%>");
13488 if (type
== NULL_TREE
)
13491 value
= wide_int_to_tree (type
, wi
);
13496 error ("overflow in enumeration values at %qD", name
);
13497 value
= error_mark_node
;
13502 value
= integer_zero_node
;
13505 /* Remove no-op casts from the value. */
13506 STRIP_TYPE_NOPS (value
);
13508 /* If the underlying type of the enum is fixed, check whether
13509 the enumerator values fits in the underlying type. If it
13510 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13511 if (ENUM_UNDERLYING_TYPE (enumtype
)
13513 && TREE_CODE (value
) == INTEGER_CST
)
13515 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13516 error ("enumerator value %E is outside the range of underlying "
13517 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13519 /* Convert the value to the appropriate type. */
13520 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13524 /* C++ associates enums with global, function, or class declarations. */
13525 context
= current_scope ();
13527 /* Build the actual enumeration constant. Note that the enumeration
13528 constants have the underlying type of the enum (if it is fixed)
13529 or the type of their initializer (if the underlying type of the
13530 enum is not fixed):
13534 If the underlying type is fixed, the type of each enumerator
13535 prior to the closing brace is the underlying type; if the
13536 initializing value of an enumerator cannot be represented by
13537 the underlying type, the program is ill-formed. If the
13538 underlying type is not fixed, the type of each enumerator is
13539 the type of its initializing value.
13541 If the underlying type is not fixed, it will be computed by
13542 finish_enum and we will reset the type of this enumerator. Of
13543 course, if we're processing a template, there may be no value. */
13544 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13546 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13548 DECL_CONTEXT (decl
) = enumtype
;
13549 TREE_CONSTANT (decl
) = 1;
13550 TREE_READONLY (decl
) = 1;
13551 DECL_INITIAL (decl
) = value
;
13554 cplus_decl_attributes (&decl
, attributes
, 0);
13556 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13557 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13558 on the TYPE_FIELDS list for `S'. (That's so that you can say
13559 things like `S::i' later.) */
13560 finish_member_declaration (decl
);
13564 /* Add this enumeration constant to the list for this type. */
13565 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13568 /* Look for an enumerator with the given NAME within the enumeration
13569 type ENUMTYPE. This routine is used primarily for qualified name
13570 lookup into an enumerator in C++0x, e.g.,
13572 enum class Color { Red, Green, Blue };
13574 Color color = Color::Red;
13576 Returns the value corresponding to the enumerator, or
13577 NULL_TREE if no such enumerator was found. */
13579 lookup_enumerator (tree enumtype
, tree name
)
13582 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13584 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13585 return e
? TREE_VALUE (e
) : NULL_TREE
;
13589 /* We're defining DECL. Make sure that its type is OK. */
13592 check_function_type (tree decl
, tree current_function_parms
)
13594 tree fntype
= TREE_TYPE (decl
);
13595 tree return_type
= complete_type (TREE_TYPE (fntype
));
13597 /* In a function definition, arg types must be complete. */
13598 require_complete_types_for_parms (current_function_parms
);
13600 if (dependent_type_p (return_type
)
13601 || type_uses_auto (return_type
))
13603 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13604 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13606 tree args
= TYPE_ARG_TYPES (fntype
);
13608 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13609 error ("return type %q#T is incomplete", return_type
);
13611 error ("return type has Java class type %q#T", return_type
);
13613 /* Make it return void instead. */
13614 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13615 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13617 TREE_CHAIN (args
));
13619 fntype
= build_function_type (void_type_node
, args
);
13621 = build_exception_variant (fntype
,
13622 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13623 fntype
= (cp_build_type_attribute_variant
13624 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13625 TREE_TYPE (decl
) = fntype
;
13628 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13631 /* True iff FN is an implicitly-defined default constructor. */
13634 implicit_default_ctor_p (tree fn
)
13636 return (DECL_CONSTRUCTOR_P (fn
)
13637 && !user_provided_p (fn
)
13638 && sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (fn
)));
13641 /* Create the FUNCTION_DECL for a function definition.
13642 DECLSPECS and DECLARATOR are the parts of the declaration;
13643 they describe the function's name and the type it returns,
13644 but twisted together in a fashion that parallels the syntax of C.
13646 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13647 DECLARATOR is really the DECL for the function we are about to
13648 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13649 indicating that the function is an inline defined in-class.
13651 This function creates a binding context for the function body
13652 as well as setting up the FUNCTION_DECL in current_function_decl.
13654 For C++, we must first check whether that datum makes any sense.
13655 For example, "class A local_a(1,2);" means that variable local_a
13656 is an aggregate of type A, which should have a constructor
13657 applied to it with the argument list [1, 2].
13659 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13660 or may be a BLOCK if the function has been defined previously
13661 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13662 error_mark_node if the function has never been defined, or
13663 a BLOCK if the function has been defined somewhere. */
13666 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13668 tree ctype
= NULL_TREE
;
13671 int doing_friend
= 0;
13672 cp_binding_level
*bl
;
13673 tree current_function_parms
;
13674 struct c_fileinfo
*finfo
13675 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13676 bool honor_interface
;
13678 /* Sanity check. */
13679 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13680 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13682 fntype
= TREE_TYPE (decl1
);
13683 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13684 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13686 /* ISO C++ 11.4/5. A friend function defined in a class is in
13687 the (lexical) scope of the class in which it is defined. */
13688 if (!ctype
&& DECL_FRIEND_P (decl1
))
13690 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13692 /* CTYPE could be null here if we're dealing with a template;
13693 for example, `inline friend float foo()' inside a template
13694 will have no CTYPE set. */
13695 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13701 if (DECL_DECLARED_INLINE_P (decl1
)
13702 && lookup_attribute ("noinline", attrs
))
13703 warning_at (DECL_SOURCE_LOCATION (decl1
), 0,
13704 "inline function %qD given attribute noinline", decl1
);
13706 /* Handle gnu_inline attribute. */
13707 if (GNU_INLINE_P (decl1
))
13709 DECL_EXTERNAL (decl1
) = 1;
13710 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13711 DECL_INTERFACE_KNOWN (decl1
) = 1;
13712 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13715 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13716 /* This is a constructor, we must ensure that any default args
13717 introduced by this definition are propagated to the clones
13718 now. The clones are used directly in overload resolution. */
13719 adjust_clone_args (decl1
);
13721 /* Sometimes we don't notice that a function is a static member, and
13722 build a METHOD_TYPE for it. Fix that up now. */
13723 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13724 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13726 /* Set up current_class_type, and enter the scope of the class, if
13729 push_nested_class (ctype
);
13730 else if (DECL_STATIC_FUNCTION_P (decl1
))
13731 push_nested_class (DECL_CONTEXT (decl1
));
13733 /* Now that we have entered the scope of the class, we must restore
13734 the bindings for any template parameters surrounding DECL1, if it
13735 is an inline member template. (Order is important; consider the
13736 case where a template parameter has the same name as a field of
13737 the class.) It is not until after this point that
13738 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13739 if (flags
& SF_INCLASS_INLINE
)
13740 maybe_begin_member_template_processing (decl1
);
13742 /* Effective C++ rule 15. */
13744 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13745 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13746 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13748 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13749 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13750 if (!DECL_INITIAL (decl1
))
13751 DECL_INITIAL (decl1
) = error_mark_node
;
13753 /* This function exists in static storage.
13754 (This does not mean `static' in the C sense!) */
13755 TREE_STATIC (decl1
) = 1;
13757 /* We must call push_template_decl after current_class_type is set
13758 up. (If we are processing inline definitions after exiting a
13759 class scope, current_class_type will be NULL_TREE until set above
13760 by push_nested_class.) */
13761 if (processing_template_decl
)
13763 tree newdecl1
= push_template_decl (decl1
);
13764 if (newdecl1
== error_mark_node
)
13766 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13767 pop_nested_class ();
13773 /* We are now in the scope of the function being defined. */
13774 current_function_decl
= decl1
;
13776 /* Save the parm names or decls from this function's declarator
13777 where store_parm_decls will find them. */
13778 current_function_parms
= DECL_ARGUMENTS (decl1
);
13780 /* Make sure the parameter and return types are reasonable. When
13781 you declare a function, these types can be incomplete, but they
13782 must be complete when you define the function. */
13783 check_function_type (decl1
, current_function_parms
);
13785 /* Build the return declaration for the function. */
13786 restype
= TREE_TYPE (fntype
);
13788 if (DECL_RESULT (decl1
) == NULL_TREE
)
13792 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13793 DECL_ARTIFICIAL (resdecl
) = 1;
13794 DECL_IGNORED_P (resdecl
) = 1;
13795 DECL_RESULT (decl1
) = resdecl
;
13797 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13800 /* Let the user know we're compiling this function. */
13801 announce_function (decl1
);
13803 /* Record the decl so that the function name is defined.
13804 If we already have a decl for this name, and it is a FUNCTION_DECL,
13805 use the old decl. */
13806 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13808 /* A specialization is not used to guide overload resolution. */
13809 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13810 && !(DECL_USE_TEMPLATE (decl1
) &&
13811 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13813 tree olddecl
= pushdecl (decl1
);
13815 if (olddecl
== error_mark_node
)
13816 /* If something went wrong when registering the declaration,
13817 use DECL1; we have to have a FUNCTION_DECL to use when
13818 parsing the body of the function. */
13822 /* Otherwise, OLDDECL is either a previous declaration
13823 of the same function or DECL1 itself. */
13825 if (warn_missing_declarations
13826 && olddecl
== decl1
13827 && !DECL_MAIN_P (decl1
)
13828 && TREE_PUBLIC (decl1
)
13829 && !DECL_DECLARED_INLINE_P (decl1
))
13833 /* Check whether DECL1 is in an anonymous
13835 for (context
= DECL_CONTEXT (decl1
);
13837 context
= DECL_CONTEXT (context
))
13839 if (TREE_CODE (context
) == NAMESPACE_DECL
13840 && DECL_NAME (context
) == NULL_TREE
)
13844 if (context
== NULL
)
13845 warning_at (DECL_SOURCE_LOCATION (decl1
),
13846 OPT_Wmissing_declarations
,
13847 "no previous declaration for %qD", decl1
);
13855 /* We need to set the DECL_CONTEXT. */
13856 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13857 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13859 fntype
= TREE_TYPE (decl1
);
13860 restype
= TREE_TYPE (fntype
);
13862 /* If #pragma weak applies, mark the decl appropriately now.
13863 The pragma only applies to global functions. Because
13864 determining whether or not the #pragma applies involves
13865 computing the mangled name for the declaration, we cannot
13866 apply the pragma until after we have merged this declaration
13867 with any previous declarations; if the original declaration
13868 has a linkage specification, that specification applies to
13869 the definition as well, and may affect the mangled name. */
13870 if (DECL_FILE_SCOPE_P (decl1
))
13871 maybe_apply_pragma_weak (decl1
);
13874 /* Reset this in case the call to pushdecl changed it. */
13875 current_function_decl
= decl1
;
13877 gcc_assert (DECL_INITIAL (decl1
));
13879 /* This function may already have been parsed, in which case just
13880 return; our caller will skip over the body without parsing. */
13881 if (DECL_INITIAL (decl1
) != error_mark_node
)
13884 /* Initialize RTL machinery. We cannot do this until
13885 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13886 even when processing a template; this is how we get
13887 CFUN set up, and our per-function variables initialized.
13888 FIXME factor out the non-RTL stuff. */
13889 bl
= current_binding_level
;
13890 allocate_struct_function (decl1
, processing_template_decl
);
13892 /* Initialize the language data structures. Whenever we start
13893 a new function, we destroy temporaries in the usual way. */
13894 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13895 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13896 current_binding_level
= bl
;
13898 if (!processing_template_decl
&& type_uses_auto (restype
))
13900 FNDECL_USED_AUTO (decl1
) = true;
13901 current_function_auto_return_pattern
= restype
;
13904 /* Start the statement-tree, start the tree now. */
13905 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13907 /* If we are (erroneously) defining a function that we have already
13908 defined before, wipe out what we knew before. */
13909 if (!DECL_PENDING_INLINE_P (decl1
))
13910 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13912 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13914 /* We know that this was set up by `grokclassfn'. We do not
13915 wait until `store_parm_decls', since evil parse errors may
13916 never get us to that point. Here we keep the consistency
13917 between `current_class_type' and `current_class_ptr'. */
13918 tree t
= DECL_ARGUMENTS (decl1
);
13920 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13921 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13923 cp_function_chain
->x_current_class_ref
13924 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13925 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13926 cp_function_chain
->x_current_class_ptr
= t
;
13928 /* Constructors and destructors need to know whether they're "in
13929 charge" of initializing virtual base classes. */
13930 t
= DECL_CHAIN (t
);
13931 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13933 current_in_charge_parm
= t
;
13934 t
= DECL_CHAIN (t
);
13936 if (DECL_HAS_VTT_PARM_P (decl1
))
13938 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13939 current_vtt_parm
= t
;
13943 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13944 /* Implicitly-defined methods (like the
13945 destructor for a class in which no destructor
13946 is explicitly declared) must not be defined
13947 until their definition is needed. So, we
13948 ignore interface specifications for
13949 compiler-generated functions. */
13950 && !DECL_ARTIFICIAL (decl1
));
13952 if (processing_template_decl
)
13953 /* Don't mess with interface flags. */;
13954 else if (DECL_INTERFACE_KNOWN (decl1
))
13956 tree ctx
= decl_function_context (decl1
);
13958 if (DECL_NOT_REALLY_EXTERN (decl1
))
13959 DECL_EXTERNAL (decl1
) = 0;
13961 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13962 /* This is a function in a local class in an extern inline
13963 or template function. */
13964 comdat_linkage (decl1
);
13966 /* If this function belongs to an interface, it is public.
13967 If it belongs to someone else's interface, it is also external.
13968 This only affects inlines and template instantiations. */
13969 else if (!finfo
->interface_unknown
&& honor_interface
)
13971 if (DECL_DECLARED_INLINE_P (decl1
)
13972 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13974 DECL_EXTERNAL (decl1
)
13975 = (finfo
->interface_only
13976 || (DECL_DECLARED_INLINE_P (decl1
)
13977 && ! flag_implement_inlines
13978 && !DECL_VINDEX (decl1
)));
13980 /* For WIN32 we also want to put these in linkonce sections. */
13981 maybe_make_one_only (decl1
);
13984 DECL_EXTERNAL (decl1
) = 0;
13985 DECL_INTERFACE_KNOWN (decl1
) = 1;
13986 /* If this function is in an interface implemented in this file,
13987 make sure that the back end knows to emit this function
13989 if (!DECL_EXTERNAL (decl1
))
13990 mark_needed (decl1
);
13992 else if (finfo
->interface_unknown
&& finfo
->interface_only
13993 && honor_interface
)
13995 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13996 interface, we will have both finfo->interface_unknown and
13997 finfo->interface_only set. In that case, we don't want to
13998 use the normal heuristics because someone will supply a
13999 #pragma implementation elsewhere, and deducing it here would
14000 produce a conflict. */
14001 comdat_linkage (decl1
);
14002 DECL_EXTERNAL (decl1
) = 0;
14003 DECL_INTERFACE_KNOWN (decl1
) = 1;
14004 DECL_DEFER_OUTPUT (decl1
) = 1;
14008 /* This is a definition, not a reference.
14009 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
14010 if (!GNU_INLINE_P (decl1
))
14011 DECL_EXTERNAL (decl1
) = 0;
14013 if ((DECL_DECLARED_INLINE_P (decl1
)
14014 || DECL_TEMPLATE_INSTANTIATION (decl1
))
14015 && ! DECL_INTERFACE_KNOWN (decl1
))
14016 DECL_DEFER_OUTPUT (decl1
) = 1;
14018 DECL_INTERFACE_KNOWN (decl1
) = 1;
14021 /* Determine the ELF visibility attribute for the function. We must not
14022 do this before calling "pushdecl", as we must allow "duplicate_decls"
14023 to merge any attributes appropriately. We also need to wait until
14025 if (!DECL_CLONED_FUNCTION_P (decl1
))
14026 determine_visibility (decl1
);
14028 if (!processing_template_decl
)
14029 maybe_instantiate_noexcept (decl1
);
14031 begin_scope (sk_function_parms
, decl1
);
14035 if (DECL_DESTRUCTOR_P (decl1
)
14036 || (DECL_CONSTRUCTOR_P (decl1
)
14037 && targetm
.cxx
.cdtor_returns_this ()))
14039 cdtor_label
= create_artificial_label (input_location
);
14042 start_fname_decls ();
14044 store_parm_decls (current_function_parms
);
14046 if (!processing_template_decl
14047 && flag_lifetime_dse
&& DECL_CONSTRUCTOR_P (decl1
)
14048 /* We can't clobber safely for an implicitly-defined default constructor
14049 because part of the initialization might happen before we enter the
14050 constructor, via AGGR_INIT_ZERO_FIRST (c++/68006). */
14051 && !implicit_default_ctor_p (decl1
))
14053 /* Insert a clobber to let the back end know that the object storage
14054 is dead when we enter the constructor. */
14055 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
14056 tree clobber
= build_constructor (btype
, NULL
);
14057 TREE_THIS_VOLATILE (clobber
) = true;
14058 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
14059 bref
= convert_from_reference (bref
);
14060 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
14061 finish_expr_stmt (exprstmt
);
14068 /* Like start_preparsed_function, except that instead of a
14069 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
14071 Returns true on success. If the DECLARATOR is not suitable
14072 for a function, we return false, which tells the parser to
14073 skip the entire function. */
14076 start_function (cp_decl_specifier_seq
*declspecs
,
14077 const cp_declarator
*declarator
,
14082 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
14083 invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION
, decl1
);
14084 if (decl1
== error_mark_node
)
14086 /* If the declarator is not suitable for a function definition,
14087 cause a syntax error. */
14088 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
14090 error ("invalid function declaration");
14094 if (DECL_MAIN_P (decl1
))
14095 /* main must return int. grokfndecl should have corrected it
14096 (and issued a diagnostic) if the user got it wrong. */
14097 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
14098 integer_type_node
));
14100 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
14103 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
14107 use_eh_spec_block (tree fn
)
14109 return (flag_exceptions
&& flag_enforce_eh_specs
14110 && !processing_template_decl
14111 && !type_throw_all_p (TREE_TYPE (fn
))
14112 /* We insert the EH_SPEC_BLOCK only in the original
14113 function; then, it is copied automatically to the
14115 && !DECL_CLONED_FUNCTION_P (fn
)
14116 /* Implicitly-generated constructors and destructors have
14117 exception specifications. However, those specifications
14118 are the union of the possible exceptions specified by the
14119 constructors/destructors for bases and members, so no
14120 unallowed exception will ever reach this function. By
14121 not creating the EH_SPEC_BLOCK we save a little memory,
14122 and we avoid spurious warnings about unreachable
14124 && !DECL_DEFAULTED_FN (fn
));
14127 /* Store the parameter declarations into the current function declaration.
14128 This is called after parsing the parameter declarations, before
14129 digesting the body of the function.
14131 Also install to binding contour return value identifier, if any. */
14134 store_parm_decls (tree current_function_parms
)
14136 tree fndecl
= current_function_decl
;
14139 /* This is a chain of any other decls that came in among the parm
14140 declarations. If a parm is declared with enum {foo, bar} x;
14141 then CONST_DECLs for foo and bar are put here. */
14142 tree nonparms
= NULL_TREE
;
14144 if (current_function_parms
)
14146 /* This case is when the function was defined with an ANSI prototype.
14147 The parms already have decls, so we need not do anything here
14148 except record them as in effect
14149 and complain if any redundant old-style parm decls were written. */
14151 tree specparms
= current_function_parms
;
14154 /* Must clear this because it might contain TYPE_DECLs declared
14156 current_binding_level
->names
= NULL
;
14158 /* If we're doing semantic analysis, then we'll call pushdecl
14159 for each of these. We must do them in reverse order so that
14160 they end in the correct forward order. */
14161 specparms
= nreverse (specparms
);
14163 for (parm
= specparms
; parm
; parm
= next
)
14165 next
= DECL_CHAIN (parm
);
14166 if (TREE_CODE (parm
) == PARM_DECL
)
14168 if (DECL_NAME (parm
) == NULL_TREE
14169 || !VOID_TYPE_P (parm
))
14172 error ("parameter %qD declared void", parm
);
14176 /* If we find an enum constant or a type tag,
14177 put it aside for the moment. */
14178 TREE_CHAIN (parm
) = NULL_TREE
;
14179 nonparms
= chainon (nonparms
, parm
);
14183 /* Get the decls in their original chain order and record in the
14184 function. This is all and only the PARM_DECLs that were
14185 pushed into scope by the loop above. */
14186 DECL_ARGUMENTS (fndecl
) = getdecls ();
14189 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
14191 /* Now store the final chain of decls for the arguments
14192 as the decl-chain of the current lexical scope.
14193 Put the enumerators in as well, at the front so that
14194 DECL_ARGUMENTS is not modified. */
14195 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
14197 if (use_eh_spec_block (current_function_decl
))
14198 current_eh_spec_block
= begin_eh_spec_block ();
14202 /* We have finished doing semantic analysis on DECL, but have not yet
14203 generated RTL for its body. Save away our current state, so that
14204 when we want to generate RTL later we know what to do. */
14207 save_function_data (tree decl
)
14209 struct language_function
*f
;
14211 /* Save the language-specific per-function data so that we can
14212 get it back when we really expand this function. */
14213 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
14216 f
= ggc_alloc
<language_function
> ();
14217 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
14218 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
14220 /* Clear out the bits we don't need. */
14221 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
14222 f
->bindings
= NULL
;
14223 f
->x_local_names
= NULL
;
14224 f
->base
.local_typedefs
= NULL
;
14228 /* Set the return value of the constructor (if present). */
14231 finish_constructor_body (void)
14236 if (targetm
.cxx
.cdtor_returns_this ()
14237 && (! TYPE_FOR_JAVA (current_class_type
)))
14239 /* Any return from a constructor will end up here. */
14240 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
14242 val
= DECL_ARGUMENTS (current_function_decl
);
14243 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
14244 DECL_RESULT (current_function_decl
), val
);
14245 /* Return the address of the object. */
14246 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
14247 add_stmt (exprstmt
);
14251 /* Do all the processing for the beginning of a destructor; set up the
14252 vtable pointers and cleanups for bases and members. */
14255 begin_destructor_body (void)
14257 tree compound_stmt
;
14259 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
14260 issued an error message. We still want to try to process the
14261 body of the function, but initialize_vtbl_ptrs will crash if
14262 TYPE_BINFO is NULL. */
14263 if (COMPLETE_TYPE_P (current_class_type
))
14265 compound_stmt
= begin_compound_stmt (0);
14266 /* Make all virtual function table pointers in non-virtual base
14267 classes point to CURRENT_CLASS_TYPE's virtual function
14269 initialize_vtbl_ptrs (current_class_ptr
);
14270 finish_compound_stmt (compound_stmt
);
14272 if (flag_lifetime_dse
)
14274 /* Insert a cleanup to let the back end know that the object is dead
14275 when we exit the destructor, either normally or via exception. */
14276 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
14277 tree clobber
= build_constructor (btype
, NULL
);
14278 TREE_THIS_VOLATILE (clobber
) = true;
14279 tree bref
= build_nop (build_reference_type (btype
),
14280 current_class_ptr
);
14281 bref
= convert_from_reference (bref
);
14282 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
14283 finish_decl_cleanup (NULL_TREE
, exprstmt
);
14286 /* And insert cleanups for our bases and members so that they
14287 will be properly destroyed if we throw. */
14288 push_base_cleanups ();
14292 /* At the end of every destructor we generate code to delete the object if
14293 necessary. Do that now. */
14296 finish_destructor_body (void)
14300 /* Any return from a destructor will end up here; that way all base
14301 and member cleanups will be run when the function returns. */
14302 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
14304 /* In a virtual destructor, we must call delete. */
14305 if (DECL_VIRTUAL_P (current_function_decl
))
14308 tree virtual_size
= cxx_sizeof (current_class_type
);
14312 At the point of definition of a virtual destructor (including
14313 an implicit definition), non-placement operator delete shall
14314 be looked up in the scope of the destructor's class and if
14315 found shall be accessible and unambiguous. */
14316 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
14318 /*global_p=*/false,
14319 /*placement=*/NULL_TREE
,
14320 /*alloc_fn=*/NULL_TREE
,
14321 tf_warning_or_error
);
14323 if_stmt
= begin_if_stmt ();
14324 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
14325 current_in_charge_parm
,
14328 finish_expr_stmt (exprstmt
);
14329 finish_then_clause (if_stmt
);
14330 finish_if_stmt (if_stmt
);
14333 if (targetm
.cxx
.cdtor_returns_this ())
14337 val
= DECL_ARGUMENTS (current_function_decl
);
14338 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
14339 DECL_RESULT (current_function_decl
), val
);
14340 /* Return the address of the object. */
14341 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
14342 add_stmt (exprstmt
);
14346 /* Do the necessary processing for the beginning of a function body, which
14347 in this case includes member-initializers, but not the catch clauses of
14348 a function-try-block. Currently, this means opening a binding level
14349 for the member-initializers (in a ctor), member cleanups (in a dtor),
14350 and capture proxies (in a lambda operator()). */
14353 begin_function_body (void)
14357 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14360 if (processing_template_decl
)
14361 /* Do nothing now. */;
14363 /* Always keep the BLOCK node associated with the outermost pair of
14364 curly braces of a function. These are needed for correct
14365 operation of dwarfout.c. */
14366 keep_next_level (true);
14368 stmt
= begin_compound_stmt (BCS_FN_BODY
);
14370 if (processing_template_decl
)
14371 /* Do nothing now. */;
14372 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14373 begin_destructor_body ();
14378 /* Do the processing for the end of a function body. Currently, this means
14379 closing out the cleanups for fully-constructed bases and members, and in
14380 the case of the destructor, deleting the object if desired. Again, this
14381 is only meaningful for [cd]tors, since they are the only functions where
14382 there is a significant distinction between the main body and any
14383 function catch clauses. Handling, say, main() return semantics here
14384 would be wrong, as flowing off the end of a function catch clause for
14385 main() would also need to return 0. */
14388 finish_function_body (tree compstmt
)
14390 if (compstmt
== NULL_TREE
)
14393 /* Close the block. */
14394 finish_compound_stmt (compstmt
);
14396 if (processing_template_decl
)
14397 /* Do nothing now. */;
14398 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14399 finish_constructor_body ();
14400 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14401 finish_destructor_body ();
14404 /* Given a function, returns the BLOCK corresponding to the outermost level
14405 of curly braces, skipping the artificial block created for constructor
14409 outer_curly_brace_block (tree fndecl
)
14411 tree block
= DECL_INITIAL (fndecl
);
14412 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14414 block
= BLOCK_SUBBLOCKS (block
);
14415 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14417 block
= BLOCK_SUBBLOCKS (block
);
14418 gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block
));
14422 /* If FNDECL is a class's key method, add the class to the list of
14423 keyed classes that should be emitted. */
14426 record_key_method_defined (tree fndecl
)
14428 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14429 && DECL_VIRTUAL_P (fndecl
)
14430 && !processing_template_decl
)
14432 tree fnclass
= DECL_CONTEXT (fndecl
);
14433 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14434 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14438 /* Subroutine of finish_function.
14439 Save the body of constexpr functions for possible
14440 future compile time evaluation. */
14443 maybe_save_function_definition (tree fun
)
14445 if (!processing_template_decl
14446 && DECL_DECLARED_CONSTEXPR_P (fun
)
14447 && !cp_function_chain
->invalid_constexpr
14448 && !DECL_CLONED_FUNCTION_P (fun
))
14449 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14452 /* Finish up a function declaration and compile that function
14453 all the way to assembler language output. The free the storage
14454 for the function definition.
14456 FLAGS is a bitwise or of the following values:
14458 We just finished processing the body of an in-class inline
14459 function definition. (This processing will have taken place
14460 after the class definition is complete.) */
14463 finish_function (int flags
)
14465 tree fndecl
= current_function_decl
;
14466 tree fntype
, ctype
= NULL_TREE
;
14467 int inclass_inline
= (flags
& 2) != 0;
14469 /* When we get some parse errors, we can end up without a
14470 current_function_decl, so cope. */
14471 if (fndecl
== NULL_TREE
)
14472 return error_mark_node
;
14474 if (c_dialect_objc ())
14475 objc_finish_function ();
14477 gcc_assert (!defer_mark_used_calls
);
14478 defer_mark_used_calls
= true;
14480 record_key_method_defined (fndecl
);
14482 fntype
= TREE_TYPE (fndecl
);
14484 /* TREE_READONLY (fndecl) = 1;
14485 This caused &foo to be of type ptr-to-const-function
14486 which then got a warning when stored in a ptr-to-function variable. */
14488 gcc_assert (building_stmt_list_p ());
14489 /* The current function is being defined, so its DECL_INITIAL should
14490 be set, and unless there's a multiple definition, it should be
14491 error_mark_node. */
14492 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14494 /* For a cloned function, we've already got all the code we need;
14495 there's no need to add any extra bits. */
14496 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14498 /* Make it so that `main' always returns 0 by default. */
14499 if (DECL_MAIN_P (current_function_decl
))
14500 finish_return_stmt (integer_zero_node
);
14502 if (use_eh_spec_block (current_function_decl
))
14503 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14504 (TREE_TYPE (current_function_decl
)),
14505 current_eh_spec_block
);
14508 /* If we're saving up tree structure, tie off the function now. */
14509 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14511 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14512 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14514 finish_fname_decls ();
14516 /* If this function can't throw any exceptions, remember that. */
14517 if (!processing_template_decl
14518 && !cp_function_chain
->can_throw
14519 && !flag_non_call_exceptions
14520 && !decl_replaceable_p (fndecl
))
14521 TREE_NOTHROW (fndecl
) = 1;
14523 /* This must come after expand_function_end because cleanups might
14524 have declarations (from inline functions) that need to go into
14525 this function's blocks. */
14527 /* If the current binding level isn't the outermost binding level
14528 for this function, either there is a bug, or we have experienced
14529 syntax errors and the statement tree is malformed. */
14530 if (current_binding_level
->kind
!= sk_function_parms
)
14532 /* Make sure we have already experienced errors. */
14533 gcc_assert (errorcount
);
14535 /* Throw away the broken statement tree and extra binding
14537 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14539 while (current_binding_level
->kind
!= sk_function_parms
)
14541 if (current_binding_level
->kind
== sk_class
)
14542 pop_nested_class ();
14544 poplevel (0, 0, 0);
14547 poplevel (1, 0, 1);
14549 /* Statements should always be full-expressions at the outermost set
14550 of curly braces for a function. */
14551 gcc_assert (stmts_are_full_exprs_p ());
14553 /* If there are no return statements in a function with auto return type,
14554 the return type is void. But if the declared type is something like
14555 auto*, this is an error. */
14556 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14557 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14559 if (!is_auto (current_function_auto_return_pattern
)
14560 && !current_function_returns_value
&& !current_function_returns_null
)
14562 error ("no return statements in function returning %qT",
14563 current_function_auto_return_pattern
);
14564 inform (input_location
, "only plain %<auto%> return type can be "
14565 "deduced to %<void%>");
14567 apply_deduced_return_type (fndecl
, void_type_node
);
14568 fntype
= TREE_TYPE (fndecl
);
14571 // If this is a concept, check that the definition is reasonable.
14572 if (DECL_DECLARED_CONCEPT_P (fndecl
))
14573 check_function_concept (fndecl
);
14575 /* Save constexpr function body before it gets munged by
14576 the NRV transformation. */
14577 maybe_save_function_definition (fndecl
);
14579 /* Set up the named return value optimization, if we can. Candidate
14580 variables are selected in check_return_expr. */
14581 if (current_function_return_value
)
14583 tree r
= current_function_return_value
;
14586 if (r
!= error_mark_node
14587 /* This is only worth doing for fns that return in memory--and
14588 simpler, since we don't have to worry about promoted modes. */
14589 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14590 /* Only allow this for variables declared in the outer scope of
14591 the function so we know that their lifetime always ends with a
14592 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14593 we were to do this optimization in tree-ssa. */
14594 && (outer
= outer_curly_brace_block (fndecl
))
14595 && chain_member (r
, BLOCK_VARS (outer
)))
14596 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14598 current_function_return_value
= NULL_TREE
;
14601 /* Remember that we were in class scope. */
14602 if (current_class_name
)
14603 ctype
= current_class_type
;
14605 /* Must mark the RESULT_DECL as being in this function. */
14606 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14608 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14609 to the FUNCTION_DECL node itself. */
14610 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14612 /* Save away current state, if appropriate. */
14613 if (!processing_template_decl
)
14614 save_function_data (fndecl
);
14616 /* Complain if there's just no return statement. */
14617 if (warn_return_type
14618 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14619 && !dependent_type_p (TREE_TYPE (fntype
))
14620 && !current_function_returns_value
&& !current_function_returns_null
14621 /* Don't complain if we abort or throw. */
14622 && !current_function_returns_abnormally
14623 /* Don't complain if there's an infinite loop. */
14624 && !current_function_infinite_loop
14625 /* Don't complain if we are declared noreturn. */
14626 && !TREE_THIS_VOLATILE (fndecl
)
14627 && !DECL_NAME (DECL_RESULT (fndecl
))
14628 && !TREE_NO_WARNING (fndecl
)
14629 /* Structor return values (if any) are set by the compiler. */
14630 && !DECL_CONSTRUCTOR_P (fndecl
)
14631 && !DECL_DESTRUCTOR_P (fndecl
)
14632 && targetm
.warn_func_return (fndecl
))
14634 warning (OPT_Wreturn_type
,
14635 "no return statement in function returning non-void");
14636 TREE_NO_WARNING (fndecl
) = 1;
14639 /* Store the end of the function, so that we get good line number
14640 info for the epilogue. */
14641 cfun
->function_end_locus
= input_location
;
14643 /* Complain about parameters that are only set, but never otherwise used. */
14644 if (warn_unused_but_set_parameter
14645 && !processing_template_decl
14646 && errorcount
== unused_but_set_errorcount
14647 && !DECL_CLONED_FUNCTION_P (fndecl
))
14651 for (decl
= DECL_ARGUMENTS (fndecl
);
14653 decl
= DECL_CHAIN (decl
))
14654 if (TREE_USED (decl
)
14655 && TREE_CODE (decl
) == PARM_DECL
14656 && !DECL_READ_P (decl
)
14657 && DECL_NAME (decl
)
14658 && !DECL_ARTIFICIAL (decl
)
14659 && !TREE_NO_WARNING (decl
)
14660 && !DECL_IN_SYSTEM_HEADER (decl
)
14661 && TREE_TYPE (decl
) != error_mark_node
14662 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14663 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14664 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14665 warning_at (DECL_SOURCE_LOCATION (decl
),
14666 OPT_Wunused_but_set_parameter
,
14667 "parameter %qD set but not used", decl
);
14668 unused_but_set_errorcount
= errorcount
;
14671 /* Complain about locally defined typedefs that are not used in this
14673 maybe_warn_unused_local_typedefs ();
14675 /* Possibly warn about unused parameters. */
14676 if (warn_unused_parameter
14677 && !processing_template_decl
14678 && !DECL_CLONED_FUNCTION_P (fndecl
))
14679 do_warn_unused_parameter (fndecl
);
14681 /* Genericize before inlining. */
14682 if (!processing_template_decl
)
14684 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14685 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14686 cp_genericize (fndecl
);
14687 /* Clear out the bits we don't need. */
14688 f
->x_current_class_ptr
= NULL
;
14689 f
->x_current_class_ref
= NULL
;
14690 f
->x_eh_spec_block
= NULL
;
14691 f
->x_in_charge_parm
= NULL
;
14692 f
->x_vtt_parm
= NULL
;
14693 f
->x_return_value
= NULL
;
14694 f
->bindings
= NULL
;
14695 f
->extern_decl_map
= NULL
;
14696 f
->infinite_loops
= NULL
;
14698 /* Clear out the bits we don't need. */
14699 local_names
= NULL
;
14701 /* We're leaving the context of this function, so zap cfun. It's still in
14702 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14704 current_function_decl
= NULL
;
14706 /* If this is an in-class inline definition, we may have to pop the
14707 bindings for the template parameters that we added in
14708 maybe_begin_member_template_processing when start_function was
14710 if (inclass_inline
)
14711 maybe_end_member_template_processing ();
14713 /* Leave the scope of the class. */
14715 pop_nested_class ();
14720 current_function_decl
= NULL_TREE
;
14722 defer_mark_used_calls
= false;
14723 if (deferred_mark_used_calls
)
14728 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14730 vec_free (deferred_mark_used_calls
);
14733 invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION
, fndecl
);
14737 /* Create the FUNCTION_DECL for a function definition.
14738 DECLSPECS and DECLARATOR are the parts of the declaration;
14739 they describe the return type and the name of the function,
14740 but twisted together in a fashion that parallels the syntax of C.
14742 This function creates a binding context for the function body
14743 as well as setting up the FUNCTION_DECL in current_function_decl.
14745 Returns a FUNCTION_DECL on success.
14747 If the DECLARATOR is not suitable for a function (it defines a datum
14748 instead), we return 0, which tells yyparse to report a parse error.
14750 May return void_type_node indicating that this method is actually
14751 a friend. See grokfield for more details.
14753 Came here with a `.pushlevel' .
14755 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14756 CHANGES TO CODE IN `grokfield'. */
14759 grokmethod (cp_decl_specifier_seq
*declspecs
,
14760 const cp_declarator
*declarator
, tree attrlist
)
14762 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14765 if (fndecl
== error_mark_node
)
14766 return error_mark_node
;
14768 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14770 error ("invalid member function declaration");
14771 return error_mark_node
;
14775 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14777 /* Pass friends other than inline friend functions back. */
14778 if (fndecl
== void_type_node
)
14781 if (DECL_IN_AGGR_P (fndecl
))
14783 if (DECL_CLASS_SCOPE_P (fndecl
))
14784 error ("%qD is already defined in class %qT", fndecl
,
14785 DECL_CONTEXT (fndecl
));
14786 return error_mark_node
;
14789 check_template_shadow (fndecl
);
14791 if (TREE_PUBLIC (fndecl
))
14792 DECL_COMDAT (fndecl
) = 1;
14793 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14794 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14796 /* We process method specializations in finish_struct_1. */
14797 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14799 fndecl
= push_template_decl (fndecl
);
14800 if (fndecl
== error_mark_node
)
14804 if (! DECL_FRIEND_P (fndecl
))
14806 if (DECL_CHAIN (fndecl
))
14808 fndecl
= copy_node (fndecl
);
14809 TREE_CHAIN (fndecl
) = NULL_TREE
;
14813 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14815 DECL_IN_AGGR_P (fndecl
) = 1;
14820 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14821 we can lay it out later, when and if its type becomes complete.
14823 Also handle constexpr variables where the initializer involves
14824 an unlowered PTRMEM_CST because the class isn't complete yet. */
14827 maybe_register_incomplete_var (tree var
)
14829 gcc_assert (VAR_P (var
));
14831 /* Keep track of variables with incomplete types. */
14832 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14833 && DECL_EXTERNAL (var
))
14835 tree inner_type
= TREE_TYPE (var
);
14837 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14838 inner_type
= TREE_TYPE (inner_type
);
14839 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14841 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14842 /* RTTI TD entries are created while defining the type_info. */
14843 || (TYPE_LANG_SPECIFIC (inner_type
)
14844 && TYPE_BEING_DEFINED (inner_type
)))
14846 incomplete_var iv
= {var
, inner_type
};
14847 vec_safe_push (incomplete_vars
, iv
);
14849 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14850 && decl_constant_var_p (var
)
14851 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14853 /* When the outermost open class is complete we can resolve any
14854 pointers-to-members. */
14855 tree context
= outermost_open_class ();
14856 incomplete_var iv
= {var
, context
};
14857 vec_safe_push (incomplete_vars
, iv
);
14862 /* Called when a class type (given by TYPE) is defined. If there are
14863 any existing VAR_DECLs whose type has been completed by this
14864 declaration, update them now. */
14867 complete_vars (tree type
)
14870 incomplete_var
*iv
;
14872 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14874 if (same_type_p (type
, iv
->incomplete_type
))
14876 tree var
= iv
->decl
;
14877 tree type
= TREE_TYPE (var
);
14879 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14880 == iv
->incomplete_type
)
14882 /* Complete the type of the variable. The VAR_DECL itself
14883 will be laid out in expand_expr. */
14884 complete_type (type
);
14885 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14888 /* Remove this entry from the list. */
14889 incomplete_vars
->unordered_remove (ix
);
14895 /* Check for pending declarations which may have abstract type. */
14896 complete_type_check_abstract (type
);
14899 /* If DECL is of a type which needs a cleanup, build and return an
14900 expression to perform that cleanup here. Return NULL_TREE if no
14901 cleanup need be done. */
14904 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14910 /* Assume no cleanup is required. */
14911 cleanup
= NULL_TREE
;
14913 if (error_operand_p (decl
))
14916 /* Handle "__attribute__((cleanup))". We run the cleanup function
14917 before the destructor since the destructor is what actually
14918 terminates the lifetime of the object. */
14919 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14926 /* Get the name specified by the user for the cleanup function. */
14927 id
= TREE_VALUE (TREE_VALUE (attr
));
14928 /* Look up the name to find the cleanup function to call. It is
14929 important to use lookup_name here because that is what is
14930 used in c-common.c:handle_cleanup_attribute when performing
14931 initial checks on the attribute. Note that those checks
14932 include ensuring that the function found is not an overloaded
14933 function, or an object with an overloaded call operator,
14934 etc.; we can rely on the fact that the function found is an
14935 ordinary FUNCTION_DECL. */
14936 fn
= lookup_name (id
);
14937 arg
= build_address (decl
);
14938 if (!mark_used (decl
, complain
) && !(complain
& tf_error
))
14939 return error_mark_node
;
14940 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14941 if (cleanup
== error_mark_node
)
14942 return error_mark_node
;
14944 /* Handle ordinary C++ destructors. */
14945 type
= TREE_TYPE (decl
);
14946 if (type_build_dtor_call (type
))
14948 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14952 if (TREE_CODE (type
) == ARRAY_TYPE
)
14955 addr
= build_address (decl
);
14957 call
= build_delete (TREE_TYPE (addr
), addr
,
14958 sfk_complete_destructor
, flags
, 0, complain
);
14959 if (call
== error_mark_node
)
14960 cleanup
= error_mark_node
;
14961 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14962 /* Discard the call. */;
14964 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14969 /* build_delete sets the location of the destructor call to the
14970 current location, even though the destructor is going to be
14971 called later, at the end of the current scope. This can lead to
14972 a "jumpy" behaviour for users of debuggers when they step around
14973 the end of the block. So let's unset the location of the
14974 destructor call instead. */
14975 protected_set_expr_location (cleanup
, UNKNOWN_LOCATION
);
14978 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
)))
14979 /* Treat objects with destructors as used; the destructor may do
14980 something substantive. */
14981 && !mark_used (decl
, complain
) && !(complain
& tf_error
))
14982 return error_mark_node
;
14988 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14989 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14990 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14993 static_fn_type (tree memfntype
)
14998 if (TYPE_PTRMEMFUNC_P (memfntype
))
14999 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
15000 if (POINTER_TYPE_P (memfntype
)
15001 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
15002 memfntype
= TREE_TYPE (memfntype
);
15003 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
15005 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
15006 args
= TYPE_ARG_TYPES (memfntype
);
15007 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
15008 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
15009 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
15010 fntype
= (cp_build_type_attribute_variant
15011 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
15012 fntype
= (build_exception_variant
15013 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
15014 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
15015 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
15019 /* DECL was originally constructed as a non-static member function,
15020 but turned out to be static. Update it accordingly. */
15023 revert_static_member_fn (tree decl
)
15025 tree stype
= static_fn_type (decl
);
15026 cp_cv_quals quals
= type_memfn_quals (stype
);
15027 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
15029 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
15030 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
15032 TREE_TYPE (decl
) = stype
;
15034 if (DECL_ARGUMENTS (decl
))
15035 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
15036 DECL_STATIC_FUNCTION_P (decl
) = 1;
15039 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
15040 one of the language-independent trees. */
15042 enum cp_tree_node_structure_enum
15043 cp_tree_node_structure (union lang_tree_node
* t
)
15045 switch (TREE_CODE (&t
->generic
))
15047 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
15048 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
15049 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
15050 case OVERLOAD
: return TS_CP_OVERLOAD
;
15051 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
15052 case PTRMEM_CST
: return TS_CP_PTRMEM
;
15053 case BASELINK
: return TS_CP_BASELINK
;
15054 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
15055 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
15056 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
15057 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
15058 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
15059 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
15060 case CONSTRAINT_INFO
: return TS_CP_CONSTRAINT_INFO
;
15061 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
15062 default: return TS_CP_GENERIC
;
15066 /* Build the void_list_node (void_type_node having been created). */
15068 build_void_list_node (void)
15070 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
15075 cp_missing_noreturn_ok_p (tree decl
)
15077 /* A missing noreturn is ok for the `main' function. */
15078 return DECL_MAIN_P (decl
);
15081 /* Return the decl used to identify the COMDAT group into which DECL should
15085 cxx_comdat_group (tree decl
)
15087 /* Virtual tables, construction virtual tables, and virtual table
15088 tables all go in a single COMDAT group, named after the primary
15090 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
15091 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
15092 /* For all other DECLs, the COMDAT group is the mangled name of the
15093 declaration itself. */
15096 while (DECL_THUNK_P (decl
))
15098 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
15099 into the same section as the target function. In that case
15100 we must return target's name. */
15101 tree target
= THUNK_TARGET (decl
);
15102 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
15103 && DECL_SECTION_NAME (target
) != NULL
15104 && DECL_ONE_ONLY (target
))
15114 /* Returns the return type for FN as written by the user, which may include
15115 a placeholder for a deduced return type. */
15118 fndecl_declared_return_type (tree fn
)
15120 fn
= STRIP_TEMPLATE (fn
);
15121 if (FNDECL_USED_AUTO (fn
))
15123 struct language_function
*f
= NULL
;
15124 if (DECL_STRUCT_FUNCTION (fn
))
15125 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
15127 f
= DECL_SAVED_FUNCTION_DATA (fn
);
15128 return f
->x_auto_return_pattern
;
15130 return TREE_TYPE (TREE_TYPE (fn
));
15133 /* Returns true iff DECL was declared with an auto return type and it has
15134 not yet been deduced to a real type. */
15137 undeduced_auto_decl (tree decl
)
15139 if (cxx_dialect
< cxx14
)
15141 return type_uses_auto (TREE_TYPE (decl
));
15144 /* Complain if DECL has an undeduced return type. */
15147 require_deduced_type (tree decl
)
15149 if (undeduced_auto_decl (decl
))
15150 error ("use of %qD before deduction of %<auto%>", decl
);
15153 #include "gt-cp-decl.h"