1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2014 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"
34 #include "stringpool.h"
35 #include "stor-layout.h"
41 #include "tree-iterator.h"
42 #include "tree-inline.h"
49 #include "c-family/c-common.h"
50 #include "c-family/c-objc.h"
51 #include "c-family/c-pragma.h"
52 #include "c-family/c-target.h"
53 #include "c-family/c-ubsan.h"
54 #include "diagnostic.h"
58 #include "pointer-set.h"
59 #include "splay-tree.h"
65 /* Possible cases of bad specifiers type used by bad_specifiers. */
67 BSP_VAR
, /* variable */
68 BSP_PARM
, /* parameter */
73 static tree
grokparms (tree parmlist
, tree
*);
74 static const char *redeclaration_error_message (tree
, tree
);
76 static int decl_jump_unsafe (tree
);
77 static void require_complete_types_for_parms (tree
);
78 static int ambi_op_p (enum tree_code
);
79 static int unary_op_p (enum tree_code
);
80 static void push_local_name (tree
);
81 static tree
grok_reference_init (tree
, tree
, tree
, int);
82 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
84 static int check_static_variable_definition (tree
, tree
);
85 static void record_unknown_type (tree
, const char *);
86 static tree
builtin_function_1 (tree
, tree
, bool);
87 static int member_function_or_else (tree
, tree
, enum overload_flags
);
88 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
90 static void check_for_uninitialized_const_var (tree
);
91 static hashval_t
typename_hash (const void *);
92 static int typename_compare (const void *, const void *);
93 static tree
local_variable_p_walkfn (tree
*, int *, void *);
94 static tree
record_builtin_java_type (const char *, int);
95 static const char *tag_name (enum tag_types
);
96 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
97 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
98 static void maybe_deduce_size_from_array_init (tree
, tree
);
99 static void layout_var_decl (tree
);
100 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
101 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
102 static void save_function_data (tree
);
103 static void copy_type_enum (tree
, tree
);
104 static void check_function_type (tree
, tree
);
105 static void finish_constructor_body (void);
106 static void begin_destructor_body (void);
107 static void finish_destructor_body (void);
108 static void record_key_method_defined (tree
);
109 static tree
create_array_type_for_decl (tree
, tree
, tree
);
110 static tree
get_atexit_node (void);
111 static tree
get_dso_handle_node (void);
112 static tree
start_cleanup_fn (void);
113 static void end_cleanup_fn (void);
114 static tree
cp_make_fname_decl (location_t
, tree
, int);
115 static void initialize_predefined_identifiers (void);
116 static tree check_special_function_return_type
117 (special_function_kind
, tree
, tree
);
118 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
119 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
120 static void store_parm_decls (tree
);
121 static void initialize_local_var (tree
, tree
);
122 static void expand_static_init (tree
, tree
);
124 /* The following symbols are subsumed in the cp_global_trees array, and
125 listed here individually for documentation purposes.
128 tree wchar_decl_node;
130 tree vtable_entry_type;
131 tree delta_type_node;
132 tree __t_desc_type_node;
134 tree class_type_node;
135 tree unknown_type_node;
137 Array type `vtable_entry_type[]'
140 tree vtbl_ptr_type_node;
147 A FUNCTION_DECL which can call `abort'. Not necessarily the
148 one that the user will declare, but sufficient to be called
149 by routines that want to abort the program.
153 The FUNCTION_DECL for the default `::operator delete'.
155 tree global_delete_fndecl;
158 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
159 tree tinfo_var_id; */
161 tree cp_global_trees
[CPTI_MAX
];
163 /* Indicates that there is a type value in some namespace, although
164 that is not necessarily in scope at the moment. */
166 tree global_type_node
;
168 /* The node that holds the "name" of the global scope. */
169 tree global_scope_name
;
171 #define local_names cp_function_chain->x_local_names
173 /* A list of objects which have constructors or destructors
174 which reside in the global scope. The decl is stored in
175 the TREE_VALUE slot and the initializer is stored
176 in the TREE_PURPOSE slot. */
177 tree static_aggregates
;
179 /* Like static_aggregates, but for thread_local variables. */
184 /* A node for the integer constant 2. */
186 tree integer_two_node
;
188 /* Used only for jumps to as-yet undefined labels, since jumps to
189 defined labels can have their validity checked immediately. */
191 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
192 struct named_label_use_entry
*next
;
193 /* The binding level to which this entry is *currently* attached.
194 This is initially the binding level in which the goto appeared,
195 but is modified as scopes are closed. */
196 cp_binding_level
*binding_level
;
197 /* The head of the names list that was current when the goto appeared,
198 or the inner scope popped. These are the decls that will *not* be
199 skipped when jumping to the label. */
201 /* The location of the goto, for error reporting. */
202 location_t o_goto_locus
;
203 /* True if an OpenMP structured block scope has been closed since
204 the goto appeared. This means that the branch from the label will
205 illegally exit an OpenMP scope. */
209 /* A list of all LABEL_DECLs in the function that have names. Here so
210 we can clear out their names' definitions at the end of the
211 function, and so we can check the validity of jumps to these labels. */
213 struct GTY(()) named_label_entry
{
214 /* The decl itself. */
217 /* The binding level to which the label is *currently* attached.
218 This is initially set to the binding level in which the label
219 is defined, but is modified as scopes are closed. */
220 cp_binding_level
*binding_level
;
221 /* The head of the names list that was current when the label was
222 defined, or the inner scope popped. These are the decls that will
223 be skipped when jumping to the label. */
225 /* A vector of all decls from all binding levels that would be
226 crossed by a backward branch to the label. */
227 vec
<tree
, va_gc
> *bad_decls
;
229 /* A list of uses of the label, before the label is defined. */
230 struct named_label_use_entry
*uses
;
232 /* The following bits are set after the label is defined, and are
233 updated as scopes are popped. They indicate that a backward jump
234 to the label will illegally enter a scope of the given flavor. */
240 #define named_labels cp_function_chain->x_named_labels
242 /* The number of function bodies which we are currently processing.
243 (Zero if we are at namespace scope, one inside the body of a
244 function, two inside the body of a function in a local class, etc.) */
247 /* To avoid unwanted recursion, finish_function defers all mark_used calls
248 encountered during its execution until it finishes. */
249 bool defer_mark_used_calls
;
250 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
252 /* States indicating how grokdeclarator() should handle declspecs marked
253 with __attribute__((deprecated)). An object declared as
254 __attribute__((deprecated)) suppresses warnings of uses of other
256 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
259 /* A list of VAR_DECLs whose type was incomplete at the time the
260 variable was declared. */
262 typedef struct GTY(()) incomplete_var_d
{
264 tree incomplete_type
;
268 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
270 /* Returns the kind of template specialization we are currently
271 processing, given that it's declaration contained N_CLASS_SCOPES
272 explicit scope qualifications. */
275 current_tmpl_spec_kind (int n_class_scopes
)
277 int n_template_parm_scopes
= 0;
278 int seen_specialization_p
= 0;
279 int innermost_specialization_p
= 0;
282 /* Scan through the template parameter scopes. */
283 for (b
= current_binding_level
;
284 b
->kind
== sk_template_parms
;
287 /* If we see a specialization scope inside a parameter scope,
288 then something is wrong. That corresponds to a declaration
291 template <class T> template <> ...
293 which is always invalid since [temp.expl.spec] forbids the
294 specialization of a class member template if the enclosing
295 class templates are not explicitly specialized as well. */
296 if (b
->explicit_spec_p
)
298 if (n_template_parm_scopes
== 0)
299 innermost_specialization_p
= 1;
301 seen_specialization_p
= 1;
303 else if (seen_specialization_p
== 1)
304 return tsk_invalid_member_spec
;
306 ++n_template_parm_scopes
;
309 /* Handle explicit instantiations. */
310 if (processing_explicit_instantiation
)
312 if (n_template_parm_scopes
!= 0)
313 /* We've seen a template parameter list during an explicit
314 instantiation. For example:
316 template <class T> template void f(int);
318 This is erroneous. */
319 return tsk_invalid_expl_inst
;
321 return tsk_expl_inst
;
324 if (n_template_parm_scopes
< n_class_scopes
)
325 /* We've not seen enough template headers to match all the
326 specialized classes present. For example:
328 template <class T> void R<T>::S<T>::f(int);
330 This is invalid; there needs to be one set of template
331 parameters for each class. */
332 return tsk_insufficient_parms
;
333 else if (n_template_parm_scopes
== n_class_scopes
)
334 /* We're processing a non-template declaration (even though it may
335 be a member of a template class.) For example:
337 template <class T> void S<T>::f(int);
339 The `class T' matches the `S<T>', leaving no template headers
340 corresponding to the `f'. */
342 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
343 /* We've got too many template headers. For example:
345 template <> template <class T> void f (T);
347 There need to be more enclosing classes. */
348 return tsk_excessive_parms
;
350 /* This must be a template. It's of the form:
352 template <class T> template <class U> void S<T>::f(U);
354 This is a specialization if the innermost level was a
355 specialization; otherwise it's just a definition of the
357 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
360 /* Exit the current scope. */
368 /* When a label goes out of scope, check to see if that label was used
369 in a valid manner, and issue any appropriate warnings or errors. */
372 pop_label (tree label
, tree old_value
)
374 if (!processing_template_decl
)
376 if (DECL_INITIAL (label
) == NULL_TREE
)
380 error ("label %q+D used but not defined", label
);
381 location
= input_location
;
382 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
383 /* Avoid crashing later. */
384 define_label (location
, DECL_NAME (label
));
387 warn_for_unused_label (label
);
390 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
393 /* At the end of a function, all labels declared within the function
394 go out of scope. BLOCK is the top-level block for the
398 pop_labels_1 (void **slot
, void *data
)
400 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
401 tree block
= (tree
) data
;
403 pop_label (ent
->label_decl
, NULL_TREE
);
405 /* Put the labels into the "variables" of the top-level block,
406 so debugger can see them. */
407 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
408 BLOCK_VARS (block
) = ent
->label_decl
;
410 htab_clear_slot (named_labels
, slot
);
416 pop_labels (tree block
)
420 htab_traverse (named_labels
, pop_labels_1
, block
);
425 /* At the end of a block with local labels, restore the outer definition. */
428 pop_local_label (tree label
, tree old_value
)
430 struct named_label_entry dummy
;
433 pop_label (label
, old_value
);
435 dummy
.label_decl
= label
;
436 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
437 htab_clear_slot (named_labels
, slot
);
440 /* The following two routines are used to interface to Objective-C++.
441 The binding level is purposely treated as an opaque type. */
444 objc_get_current_scope (void)
446 return current_binding_level
;
449 /* The following routine is used by the NeXT-style SJLJ exceptions;
450 variables get marked 'volatile' so as to not be clobbered by
451 _setjmp()/_longjmp() calls. All variables in the current scope,
452 as well as parent scopes up to (but not including) ENCLOSING_BLK
453 shall be thusly marked. */
456 objc_mark_locals_volatile (void *enclosing_blk
)
458 cp_binding_level
*scope
;
460 for (scope
= current_binding_level
;
461 scope
&& scope
!= enclosing_blk
;
462 scope
= scope
->level_chain
)
466 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
467 objc_volatilize_decl (decl
);
469 /* Do not climb up past the current function. */
470 if (scope
->kind
== sk_function_parms
)
475 /* Update data for defined and undefined labels when leaving a scope. */
478 poplevel_named_label_1 (void **slot
, void *data
)
480 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
481 cp_binding_level
*bl
= (cp_binding_level
*) data
;
482 cp_binding_level
*obl
= bl
->level_chain
;
484 if (ent
->binding_level
== bl
)
488 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
489 TREE_LISTs representing OVERLOADs, so be careful. */
490 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
492 : TREE_CHAIN (decl
)))
493 if (decl_jump_unsafe (decl
))
494 vec_safe_push (ent
->bad_decls
, decl
);
496 ent
->binding_level
= obl
;
497 ent
->names_in_scope
= obl
->names
;
501 ent
->in_try_scope
= true;
504 ent
->in_catch_scope
= true;
507 ent
->in_omp_scope
= true;
515 struct named_label_use_entry
*use
;
517 for (use
= ent
->uses
; use
; use
= use
->next
)
518 if (use
->binding_level
== bl
)
520 use
->binding_level
= obl
;
521 use
->names_in_scope
= obl
->names
;
522 if (bl
->kind
== sk_omp
)
523 use
->in_omp_scope
= true;
530 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
531 when errors were reported, except for -Werror-unused-but-set-*. */
532 static int unused_but_set_errorcount
;
534 /* Exit a binding level.
535 Pop the level off, and restore the state of the identifier-decl mappings
536 that were in effect when this level was entered.
538 If KEEP == 1, this level had explicit declarations, so
539 and create a "block" (a BLOCK node) for the level
540 to record its declarations and subblocks for symbol table output.
542 If FUNCTIONBODY is nonzero, this level is the body of a function,
543 so create a block as if KEEP were set and also clear out all
546 If REVERSE is nonzero, reverse the order of decls before putting
547 them into the BLOCK. */
550 poplevel (int keep
, int reverse
, int functionbody
)
553 /* The chain of decls was accumulated in reverse order.
554 Put it into forward order, just for cleanliness. */
559 int leaving_for_scope
;
562 cp_label_binding
*label_bind
;
564 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
570 gcc_assert (current_binding_level
->kind
!= sk_class
);
572 if (current_binding_level
->kind
== sk_cleanup
)
574 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
576 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
578 /* We used to use KEEP == 2 to indicate that the new block should go
579 at the beginning of the list of blocks at this binding level,
580 rather than the end. This hack is no longer used. */
581 gcc_assert (keep
== 0 || keep
== 1);
583 if (current_binding_level
->keep
)
586 /* Any uses of undefined labels, and any defined labels, now operate
587 under constraints of next binding contour. */
588 if (cfun
&& !functionbody
&& named_labels
)
589 htab_traverse (named_labels
, poplevel_named_label_1
,
590 current_binding_level
);
592 /* Get the decls in the order they were written.
593 Usually current_binding_level->names is in reverse order.
594 But parameter decls were previously put in forward order. */
597 current_binding_level
->names
598 = decls
= nreverse (current_binding_level
->names
);
600 decls
= current_binding_level
->names
;
602 /* If there were any declarations or structure tags in that level,
603 or if this level is a function body,
604 create a BLOCK to record them for the life of this function. */
606 if (keep
== 1 || functionbody
)
607 block
= make_node (BLOCK
);
608 if (block
!= NULL_TREE
)
610 BLOCK_VARS (block
) = decls
;
611 BLOCK_SUBBLOCKS (block
) = subblocks
;
614 /* In each subblock, record that this is its superior. */
616 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
617 BLOCK_SUPERCONTEXT (link
) = block
;
619 /* We still support the old for-scope rules, whereby the variables
620 in a for-init statement were in scope after the for-statement
621 ended. We only use the new rules if flag_new_for_scope is
624 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
626 /* Before we remove the declarations first check for unused variables. */
627 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
628 && !processing_template_decl
)
629 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
631 /* There are cases where D itself is a TREE_LIST. See in
632 push_local_binding where the list of decls returned by
633 getdecls is built. */
634 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
635 // See through references for improved -Wunused-variable (PR 38958).
636 tree type
= non_reference (TREE_TYPE (decl
));
638 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
639 && ! DECL_IN_SYSTEM_HEADER (decl
)
640 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
641 && type
!= error_mark_node
642 && (!CLASS_TYPE_P (type
)
643 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
644 || lookup_attribute ("warn_unused",
645 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
647 if (! TREE_USED (decl
))
648 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
649 else if (DECL_CONTEXT (decl
) == current_function_decl
650 // For -Wunused-but-set-variable leave references alone.
651 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
652 && errorcount
== unused_but_set_errorcount
)
654 warning (OPT_Wunused_but_set_variable
,
655 "variable %q+D 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. */
789 /* Since this is the top level block of a function, the vars are
790 the function's parameters. Don't leave them in the BLOCK
791 because they are found in the FUNCTION_DECL instead. */
792 BLOCK_VARS (block
) = 0;
796 kind
= current_binding_level
->kind
;
797 if (kind
== sk_cleanup
)
801 /* If this is a temporary binding created for a cleanup, then we'll
802 have pushed a statement list level. Pop that, create a new
803 BIND_EXPR for the block, and insert it into the stream. */
804 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
805 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
812 /* The current function is being defined, so its DECL_INITIAL
813 should be error_mark_node. */
814 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
815 DECL_INITIAL (current_function_decl
) = block
;
818 current_binding_level
->blocks
819 = block_chainon (current_binding_level
->blocks
, block
);
821 /* If we did not make a block for the level just exited,
822 any blocks made for inner levels
823 (since they cannot be recorded as subblocks in that level)
824 must be carried forward so they will later become subblocks
825 of something else. */
827 current_binding_level
->blocks
828 = block_chainon (current_binding_level
->blocks
, subblocks
);
830 /* Each and every BLOCK node created here in `poplevel' is important
831 (e.g. for proper debugging information) so if we created one
832 earlier, mark it as "used". */
834 TREE_USED (block
) = 1;
836 /* All temporary bindings created for cleanups are popped silently. */
837 if (kind
== sk_cleanup
)
840 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
844 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
845 itself, calling F for each. The DATA is passed to F as well. */
848 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
851 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
853 result
|= (*f
) (name_space
, data
);
855 for (; current
; current
= DECL_CHAIN (current
))
856 result
|= walk_namespaces_r (current
, f
, data
);
861 /* Walk all the namespaces, calling F for each. The DATA is passed to
865 walk_namespaces (walk_namespaces_fn f
, void* data
)
867 return walk_namespaces_r (global_namespace
, f
, data
);
870 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
871 DATA is non-NULL, this is the last time we will call
872 wrapup_global_declarations for this NAMESPACE. */
875 wrapup_globals_for_namespace (tree name_space
, void *data
)
877 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
878 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
879 tree
*vec
= statics
->address ();
880 int len
= statics
->length ();
881 int last_time
= (data
!= 0);
885 check_global_declarations (vec
, len
);
886 emit_debug_global_declarations (vec
, len
);
890 /* Write out any globals that need to be output. */
891 return wrapup_global_declarations (vec
, len
);
895 /* In C++, you don't have to write `struct S' to refer to `S'; you
896 can just use `S'. We accomplish this by creating a TYPE_DECL as
897 if the user had written `typedef struct S S'. Create and return
898 the TYPE_DECL for TYPE. */
901 create_implicit_typedef (tree name
, tree type
)
905 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
906 DECL_ARTIFICIAL (decl
) = 1;
907 /* There are other implicit type declarations, like the one *within*
908 a class that allows you to write `S::S'. We must distinguish
910 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
911 TYPE_NAME (type
) = decl
;
912 TYPE_STUB_DECL (type
) = decl
;
917 /* Remember a local name for name-mangling purposes. */
920 push_local_name (tree decl
)
925 timevar_start (TV_NAME_LOOKUP
);
927 name
= DECL_NAME (decl
);
929 nelts
= vec_safe_length (local_names
);
930 for (i
= 0; i
< nelts
; i
++)
932 t
= (*local_names
)[i
];
933 if (DECL_NAME (t
) == name
)
935 if (!DECL_LANG_SPECIFIC (decl
))
936 retrofit_lang_decl (decl
);
937 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
938 if (DECL_DISCRIMINATOR_SET_P (t
))
939 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
941 DECL_DISCRIMINATOR (decl
) = 1;
943 (*local_names
)[i
] = decl
;
944 timevar_stop (TV_NAME_LOOKUP
);
949 vec_safe_push (local_names
, decl
);
950 timevar_stop (TV_NAME_LOOKUP
);
953 /* Subroutine of duplicate_decls: return truthvalue of whether
954 or not types of these decls match.
956 For C++, we must compare the parameter list so that `int' can match
957 `int&' in a parameter position, but `int&' is not confused with
961 decls_match (tree newdecl
, tree olddecl
)
965 if (newdecl
== olddecl
)
968 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
969 /* If the two DECLs are not even the same kind of thing, we're not
970 interested in their types. */
973 gcc_assert (DECL_P (newdecl
));
975 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
977 tree f1
= TREE_TYPE (newdecl
);
978 tree f2
= TREE_TYPE (olddecl
);
979 tree p1
= TYPE_ARG_TYPES (f1
);
980 tree p2
= TYPE_ARG_TYPES (f2
);
983 /* Specializations of different templates are different functions
984 even if they have the same type. */
985 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
986 ? DECL_TI_TEMPLATE (newdecl
)
988 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
989 ? DECL_TI_TEMPLATE (olddecl
)
994 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
995 && ! (DECL_EXTERN_C_P (newdecl
)
996 && DECL_EXTERN_C_P (olddecl
)))
999 /* A new declaration doesn't match a built-in one unless it
1000 is also extern "C". */
1001 if (DECL_IS_BUILTIN (olddecl
)
1002 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1005 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1008 /* A declaration with deduced return type should use its pre-deduction
1009 type for declaration matching. */
1010 r2
= fndecl_declared_return_type (olddecl
);
1012 if (same_type_p (TREE_TYPE (f1
), r2
))
1014 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1015 && (DECL_BUILT_IN (olddecl
)
1016 #ifndef NO_IMPLICIT_EXTERN_C
1017 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1018 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1022 types_match
= self_promoting_args_p (p1
);
1023 if (p1
== void_list_node
)
1024 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1026 #ifndef NO_IMPLICIT_EXTERN_C
1027 else if (!prototype_p (f1
)
1028 && (DECL_EXTERN_C_P (olddecl
)
1029 && DECL_IN_SYSTEM_HEADER (olddecl
)
1030 && !DECL_CLASS_SCOPE_P (olddecl
))
1031 && (DECL_EXTERN_C_P (newdecl
)
1032 && DECL_IN_SYSTEM_HEADER (newdecl
)
1033 && !DECL_CLASS_SCOPE_P (newdecl
)))
1035 types_match
= self_promoting_args_p (p2
);
1036 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1042 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1043 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1044 || comp_type_attributes (TREE_TYPE (newdecl
),
1045 TREE_TYPE (olddecl
)) != 0);
1050 /* The decls dont match if they correspond to two different versions
1051 of the same function. Disallow extern "C" functions to be
1052 versions for now. */
1054 && !DECL_EXTERN_C_P (newdecl
)
1055 && !DECL_EXTERN_C_P (olddecl
)
1056 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1058 /* Mark functions as versions if necessary. Modify the mangled decl
1059 name if necessary. */
1060 if (DECL_FUNCTION_VERSIONED (newdecl
)
1061 && DECL_FUNCTION_VERSIONED (olddecl
))
1063 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1065 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1066 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1067 mangle_decl (newdecl
);
1069 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1071 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1072 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1073 mangle_decl (olddecl
);
1075 record_function_versions (olddecl
, newdecl
);
1079 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1081 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1082 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1085 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1086 DECL_TEMPLATE_PARMS (olddecl
)))
1089 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1090 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1091 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1093 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1094 DECL_TEMPLATE_RESULT (newdecl
));
1098 /* Need to check scope for variable declaration (VAR_DECL).
1099 For typedef (TYPE_DECL), scope is ignored. */
1101 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1103 Two declarations for an object with C language linkage
1104 with the same name (ignoring the namespace that qualify
1105 it) that appear in different namespace scopes refer to
1107 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1110 if (TREE_TYPE (newdecl
) == error_mark_node
)
1111 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1112 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1113 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1114 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1117 types_match
= comptypes (TREE_TYPE (newdecl
),
1118 TREE_TYPE (olddecl
),
1119 COMPARE_REDECLARATION
);
1125 /* If NEWDECL is `static' and an `extern' was seen previously,
1126 warn about it. OLDDECL is the previous declaration.
1128 Note that this does not apply to the C++ case of declaring
1129 a variable `extern const' and then later `const'.
1131 Don't complain about built-in functions, since they are beyond
1132 the user's control. */
1135 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1137 if (TREE_CODE (newdecl
) == TYPE_DECL
1138 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1139 || TREE_CODE (newdecl
) == CONST_DECL
1140 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1143 /* Don't get confused by static member functions; that's a different
1145 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1146 && DECL_STATIC_FUNCTION_P (newdecl
))
1149 /* If the old declaration was `static', or the new one isn't, then
1150 everything is OK. */
1151 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1154 /* It's OK to declare a builtin function as `static'. */
1155 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1156 && DECL_ARTIFICIAL (olddecl
))
1159 if (permerror (input_location
,
1160 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1161 inform (input_location
, "previous declaration of %q+D", olddecl
);
1164 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1165 function templates. If their exception specifications do not
1166 match, issue a diagnostic. */
1169 check_redeclaration_exception_specification (tree new_decl
,
1174 tree new_exceptions
;
1175 tree old_exceptions
;
1177 new_type
= TREE_TYPE (new_decl
);
1178 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1179 old_type
= TREE_TYPE (old_decl
);
1180 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1184 If any declaration of a function has an exception-specification,
1185 all declarations, including the definition and an explicit
1186 specialization, of that function shall have an
1187 exception-specification with the same set of type-ids. */
1188 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1189 && ! DECL_IS_BUILTIN (old_decl
)
1191 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1193 error ("declaration of %qF has a different exception specifier",
1195 error ("from previous declaration %q+F", old_decl
);
1199 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1200 Otherwise issue diagnostics. */
1203 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1205 old_decl
= STRIP_TEMPLATE (old_decl
);
1206 new_decl
= STRIP_TEMPLATE (new_decl
);
1207 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1208 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1210 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1211 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1213 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1215 if (DECL_BUILT_IN (old_decl
))
1217 /* Hide a built-in declaration. */
1218 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1219 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1222 /* 7.1.5 [dcl.constexpr]
1223 Note: An explicit specialization can differ from the template
1224 declaration with respect to the constexpr specifier. */
1225 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1226 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1229 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1230 error ("from previous declaration %q+D", old_decl
);
1236 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1237 && lookup_attribute ("gnu_inline", \
1238 DECL_ATTRIBUTES (fn)))
1240 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1241 If the redeclaration is invalid, a diagnostic is issued, and the
1242 error_mark_node is returned. Otherwise, OLDDECL is returned.
1244 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1247 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1250 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1252 unsigned olddecl_uid
= DECL_UID (olddecl
);
1253 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1254 int new_defines_function
= 0;
1255 tree new_template_info
;
1257 if (newdecl
== olddecl
)
1260 types_match
= decls_match (newdecl
, olddecl
);
1262 /* If either the type of the new decl or the type of the old decl is an
1263 error_mark_node, then that implies that we have already issued an
1264 error (earlier) for some bogus type specification, and in that case,
1265 it is rather pointless to harass the user with yet more error message
1266 about the same declaration, so just pretend the types match here. */
1267 if (TREE_TYPE (newdecl
) == error_mark_node
1268 || TREE_TYPE (olddecl
) == error_mark_node
)
1269 return error_mark_node
;
1271 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1272 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1274 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1275 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1276 && check_raw_literal_operator (olddecl
))
1277 error ("literal operator template %q+D conflicts with"
1278 " raw literal operator %qD", newdecl
, olddecl
);
1279 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1280 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1281 && check_raw_literal_operator (newdecl
))
1282 error ("raw literal operator %q+D conflicts with"
1283 " literal operator template %qD", newdecl
, olddecl
);
1286 if (DECL_P (olddecl
)
1287 && TREE_CODE (newdecl
) == FUNCTION_DECL
1288 && TREE_CODE (olddecl
) == FUNCTION_DECL
1289 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1291 if (DECL_DECLARED_INLINE_P (newdecl
)
1292 && DECL_UNINLINABLE (newdecl
)
1293 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1294 /* Already warned elsewhere. */;
1295 else if (DECL_DECLARED_INLINE_P (olddecl
)
1296 && DECL_UNINLINABLE (olddecl
)
1297 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1298 /* Already warned. */;
1299 else if (DECL_DECLARED_INLINE_P (newdecl
)
1300 && DECL_UNINLINABLE (olddecl
)
1301 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1303 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1305 inform (DECL_SOURCE_LOCATION (olddecl
),
1306 "previous declaration of %qD with attribute noinline",
1309 else if (DECL_DECLARED_INLINE_P (olddecl
)
1310 && DECL_UNINLINABLE (newdecl
)
1311 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1313 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1314 "attribute noinline", newdecl
))
1315 inform (DECL_SOURCE_LOCATION (olddecl
),
1316 "previous declaration of %qD was inline",
1321 /* Check for redeclaration and other discrepancies. */
1322 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1323 && DECL_ARTIFICIAL (olddecl
))
1325 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1326 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1328 /* Avoid warnings redeclaring built-ins which have not been
1329 explicitly declared. */
1330 if (DECL_ANTICIPATED (olddecl
))
1333 /* If you declare a built-in or predefined function name as static,
1334 the old definition is overridden, but optionally warn this was a
1335 bad choice of name. */
1336 if (! TREE_PUBLIC (newdecl
))
1338 warning (OPT_Wshadow
,
1339 DECL_BUILT_IN (olddecl
)
1340 ? G_("shadowing built-in function %q#D")
1341 : G_("shadowing library function %q#D"), olddecl
);
1342 /* Discard the old built-in function. */
1345 /* If the built-in is not ansi, then programs can override
1346 it even globally without an error. */
1347 else if (! DECL_BUILT_IN (olddecl
))
1348 warning (0, "library function %q#D redeclared as non-function %q#D",
1351 error ("declaration of %q#D conflicts with built-in "
1352 "declaration %q#D", newdecl
, olddecl
);
1355 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1357 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1358 error_at (DECL_SOURCE_LOCATION (newdecl
),
1359 "redeclaration of %<pragma omp declare reduction%>");
1360 inform (DECL_SOURCE_LOCATION (olddecl
),
1361 "previous %<pragma omp declare reduction%> declaration");
1362 return error_mark_node
;
1364 else if (!types_match
)
1366 /* Avoid warnings redeclaring built-ins which have not been
1367 explicitly declared. */
1368 if (DECL_ANTICIPATED (olddecl
))
1370 /* Deal with fileptr_type_node. FILE type is not known
1371 at the time we create the builtins. */
1374 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1375 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1377 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1380 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1382 tree t
= TREE_VALUE (t1
);
1385 && TYPE_NAME (TREE_TYPE (t
))
1386 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1387 == get_identifier ("FILE")
1388 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1390 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1392 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1393 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1394 types_match
= decls_match (newdecl
, olddecl
);
1396 return duplicate_decls (newdecl
, olddecl
,
1398 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1401 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1404 else if ((DECL_EXTERN_C_P (newdecl
)
1405 && DECL_EXTERN_C_P (olddecl
))
1406 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1407 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1409 /* A near match; override the builtin. */
1411 if (TREE_PUBLIC (newdecl
))
1412 warning (0, "new declaration %q#D ambiguates built-in "
1413 "declaration %q#D", newdecl
, olddecl
);
1415 warning (OPT_Wshadow
,
1416 DECL_BUILT_IN (olddecl
)
1417 ? G_("shadowing built-in function %q#D")
1418 : G_("shadowing library function %q#D"), olddecl
);
1421 /* Discard the old built-in function. */
1424 /* Replace the old RTL to avoid problems with inlining. */
1425 COPY_DECL_RTL (newdecl
, olddecl
);
1427 /* Even if the types match, prefer the new declarations type for
1428 built-ins which have not been explicitly declared, for
1429 exception lists, etc... */
1430 else if (DECL_IS_BUILTIN (olddecl
))
1432 tree type
= TREE_TYPE (newdecl
);
1433 tree attribs
= (*targetm
.merge_type_attributes
)
1434 (TREE_TYPE (olddecl
), type
);
1436 type
= cp_build_type_attribute_variant (type
, attribs
);
1437 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1440 /* If a function is explicitly declared "throw ()", propagate that to
1441 the corresponding builtin. */
1442 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1443 && DECL_ANTICIPATED (olddecl
)
1444 && TREE_NOTHROW (newdecl
)
1445 && !TREE_NOTHROW (olddecl
))
1447 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1448 tree tmpdecl
= builtin_decl_explicit (fncode
);
1449 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1450 TREE_NOTHROW (tmpdecl
) = 1;
1453 /* Whether or not the builtin can throw exceptions has no
1454 bearing on this declarator. */
1455 TREE_NOTHROW (olddecl
) = 0;
1457 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1459 /* If a builtin function is redeclared as `static', merge
1460 the declarations, but make the original one static. */
1461 DECL_THIS_STATIC (olddecl
) = 1;
1462 TREE_PUBLIC (olddecl
) = 0;
1464 /* Make the old declaration consistent with the new one so
1465 that all remnants of the builtin-ness of this function
1466 will be banished. */
1467 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1468 COPY_DECL_RTL (newdecl
, olddecl
);
1471 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1473 /* C++ Standard, 3.3, clause 4:
1474 "[Note: a namespace name or a class template name must be unique
1475 in its declarative region (7.3.2, clause 14). ]" */
1476 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1477 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1478 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1479 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1480 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1481 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1483 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1484 && TREE_CODE (newdecl
) != TYPE_DECL
)
1485 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1486 && TREE_CODE (olddecl
) != TYPE_DECL
))
1488 /* We do nothing special here, because C++ does such nasty
1489 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1490 get shadowed, and know that if we need to find a TYPE_DECL
1491 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1492 slot of the identifier. */
1496 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1497 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1498 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1499 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1503 error ("%q#D redeclared as different kind of symbol", newdecl
);
1504 if (TREE_CODE (olddecl
) == TREE_LIST
)
1505 olddecl
= TREE_VALUE (olddecl
);
1506 inform (DECL_SOURCE_LOCATION (olddecl
),
1507 "previous declaration %q#D", olddecl
);
1509 return error_mark_node
;
1511 else if (!types_match
)
1513 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1514 /* These are certainly not duplicate declarations; they're
1515 from different scopes. */
1518 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1520 /* The name of a class template may not be declared to refer to
1521 any other template, class, function, object, namespace, value,
1522 or type in the same scope. */
1523 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1524 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1526 error ("conflicting declaration of template %q#D", newdecl
);
1527 inform (DECL_SOURCE_LOCATION (olddecl
),
1528 "previous declaration %q#D", olddecl
);
1529 return error_mark_node
;
1531 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1532 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1533 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1534 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1535 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1536 DECL_TEMPLATE_PARMS (olddecl
))
1537 /* Template functions can be disambiguated by
1539 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1540 TREE_TYPE (TREE_TYPE (olddecl
))))
1542 error ("ambiguating new declaration %q#D", newdecl
);
1543 inform (DECL_SOURCE_LOCATION (olddecl
),
1544 "old declaration %q#D", olddecl
);
1548 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1550 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1552 error ("conflicting declaration of C function %q#D",
1554 inform (DECL_SOURCE_LOCATION (olddecl
),
1555 "previous declaration %q#D", olddecl
);
1558 /* For function versions, params and types match, but they
1559 are not ambiguous. */
1560 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1561 && !DECL_FUNCTION_VERSIONED (olddecl
))
1562 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1563 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1565 error ("ambiguating new declaration of %q#D", newdecl
);
1566 inform (DECL_SOURCE_LOCATION (olddecl
),
1567 "old declaration %q#D", olddecl
);
1568 return error_mark_node
;
1575 error ("conflicting declaration %q#D", newdecl
);
1576 inform (DECL_SOURCE_LOCATION (olddecl
),
1577 "previous declaration as %q#D", olddecl
);
1578 return error_mark_node
;
1581 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1582 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1583 && (!DECL_TEMPLATE_INFO (newdecl
)
1584 || (DECL_TI_TEMPLATE (newdecl
)
1585 != DECL_TI_TEMPLATE (olddecl
))))
1586 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1587 && (!DECL_TEMPLATE_INFO (olddecl
)
1588 || (DECL_TI_TEMPLATE (olddecl
)
1589 != DECL_TI_TEMPLATE (newdecl
))))))
1590 /* It's OK to have a template specialization and a non-template
1591 with the same type, or to have specializations of two
1592 different templates with the same type. Note that if one is a
1593 specialization, and the other is an instantiation of the same
1594 template, that we do not exit at this point. That situation
1595 can occur if we instantiate a template class, and then
1596 specialize one of its methods. This situation is valid, but
1597 the declarations must be merged in the usual way. */
1599 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1600 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1601 && !DECL_USE_TEMPLATE (newdecl
))
1602 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1603 && !DECL_USE_TEMPLATE (olddecl
))))
1604 /* One of the declarations is a template instantiation, and the
1605 other is not a template at all. That's OK. */
1607 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1609 /* In [namespace.alias] we have:
1611 In a declarative region, a namespace-alias-definition can be
1612 used to redefine a namespace-alias declared in that declarative
1613 region to refer only to the namespace to which it already
1616 Therefore, if we encounter a second alias directive for the same
1617 alias, we can just ignore the second directive. */
1618 if (DECL_NAMESPACE_ALIAS (newdecl
)
1619 && (DECL_NAMESPACE_ALIAS (newdecl
)
1620 == DECL_NAMESPACE_ALIAS (olddecl
)))
1622 /* [namespace.alias]
1624 A namespace-name or namespace-alias shall not be declared as
1625 the name of any other entity in the same declarative region.
1626 A namespace-name defined at global scope shall not be
1627 declared as the name of any other entity in any global scope
1629 error ("conflicting declaration of namespace %qD", newdecl
);
1630 inform (DECL_SOURCE_LOCATION (olddecl
),
1631 "previous declaration of namespace %qD here", olddecl
);
1632 return error_mark_node
;
1636 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1639 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1640 if (DECL_NAME (olddecl
) != NULL_TREE
)
1641 inform (input_location
,
1642 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1643 ? G_("%q+#D previously defined here")
1644 : G_("%q+#D previously declared here"), olddecl
);
1645 return error_mark_node
;
1647 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1648 && DECL_INITIAL (olddecl
) != NULL_TREE
1649 && !prototype_p (TREE_TYPE (olddecl
))
1650 && prototype_p (TREE_TYPE (newdecl
)))
1652 /* Prototype decl follows defn w/o prototype. */
1653 warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1654 "prototype specified for %q#D", newdecl
);
1655 inform (DECL_SOURCE_LOCATION (olddecl
),
1656 "previous non-prototype definition here");
1658 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1659 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1662 If two declarations of the same function or object
1663 specify different linkage-specifications ..., the program
1664 is ill-formed.... Except for functions with C++ linkage,
1665 a function declaration without a linkage specification
1666 shall not precede the first linkage specification for
1667 that function. A function can be declared without a
1668 linkage specification after an explicit linkage
1669 specification has been seen; the linkage explicitly
1670 specified in the earlier declaration is not affected by
1671 such a function declaration.
1673 DR 563 raises the question why the restrictions on
1674 functions should not also apply to objects. Older
1675 versions of G++ silently ignore the linkage-specification
1683 which is clearly wrong. Therefore, we now treat objects
1685 if (current_lang_depth () == 0)
1687 /* There is no explicit linkage-specification, so we use
1688 the linkage from the previous declaration. */
1689 if (!DECL_LANG_SPECIFIC (newdecl
))
1690 retrofit_lang_decl (newdecl
);
1691 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1695 error ("conflicting declaration of %q#D with %qL linkage",
1696 newdecl
, DECL_LANGUAGE (newdecl
));
1697 inform (DECL_SOURCE_LOCATION (olddecl
),
1698 "previous declaration with %qL linkage",
1699 DECL_LANGUAGE (olddecl
));
1703 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1705 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1707 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1708 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1711 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1712 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1714 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
1715 && CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (newdecl
)))
1718 Default arguments for a member function of a class template
1719 shall be specified on the initial declaration of the member
1720 function within the class template. */
1721 for (; t2
&& t2
!= void_list_node
; t2
= TREE_CHAIN (t2
))
1722 if (TREE_PURPOSE (t2
))
1724 permerror (input_location
,
1725 "redeclaration of %q#D may not have default "
1726 "arguments", newdecl
);
1732 for (; t1
&& t1
!= void_list_node
;
1733 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1734 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1736 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1739 if (permerror (input_location
,
1740 "default argument given for parameter "
1741 "%d of %q#D", i
, newdecl
))
1742 permerror (DECL_SOURCE_LOCATION (olddecl
),
1743 "previous specification in %q#D here",
1748 error ("default argument given for parameter %d "
1749 "of %q#D", i
, newdecl
);
1750 inform (DECL_SOURCE_LOCATION (olddecl
),
1751 "previous specification in %q#D here",
1759 /* Do not merge an implicit typedef with an explicit one. In:
1763 typedef class A A __attribute__ ((foo));
1765 the attribute should apply only to the typedef. */
1766 if (TREE_CODE (olddecl
) == TYPE_DECL
1767 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1768 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1771 /* If new decl is `static' and an `extern' was seen previously,
1773 warn_extern_redeclared_static (newdecl
, olddecl
);
1775 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1776 return error_mark_node
;
1778 /* We have committed to returning 1 at this point. */
1779 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1781 /* Now that functions must hold information normally held
1782 by field decls, there is extra work to do so that
1783 declaration information does not get destroyed during
1785 if (DECL_VINDEX (olddecl
))
1786 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1787 if (DECL_CONTEXT (olddecl
))
1788 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1789 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1790 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1791 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1792 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1793 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1794 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1795 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1796 SET_OVERLOADED_OPERATOR_CODE
1797 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1798 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1800 /* Optionally warn about more than one declaration for the same
1801 name, but don't warn about a function declaration followed by a
1803 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1804 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1805 /* Don't warn about extern decl followed by definition. */
1806 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1807 /* Don't warn about friends, let add_friend take care of it. */
1808 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1809 /* Don't warn about declaration followed by specialization. */
1810 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1811 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1813 if (warning (OPT_Wredundant_decls
,
1814 "redundant redeclaration of %qD in same scope",
1816 inform (DECL_SOURCE_LOCATION (olddecl
),
1817 "previous declaration of %qD", olddecl
);
1820 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1821 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1823 if (DECL_DELETED_FN (newdecl
))
1825 error ("deleted definition of %qD", newdecl
);
1826 inform (DECL_SOURCE_LOCATION (olddecl
),
1827 "previous declaration of %qD", olddecl
);
1829 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1833 /* Deal with C++: must preserve virtual function table size. */
1834 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1836 tree newtype
= TREE_TYPE (newdecl
);
1837 tree oldtype
= TREE_TYPE (olddecl
);
1839 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1840 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1841 CLASSTYPE_FRIEND_CLASSES (newtype
)
1842 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1844 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1847 /* Copy all the DECL_... slots specified in the new decl
1848 except for any that we copy here from the old type. */
1849 DECL_ATTRIBUTES (newdecl
)
1850 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1852 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1856 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1857 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1858 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1859 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1860 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1861 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1863 DECL_ATTRIBUTES (old_result
)
1864 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1866 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1868 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1869 && DECL_INITIAL (new_result
))
1871 if (DECL_INITIAL (old_result
))
1872 DECL_UNINLINABLE (old_result
) = 1;
1874 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1875 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1876 DECL_NOT_REALLY_EXTERN (old_result
)
1877 = DECL_NOT_REALLY_EXTERN (new_result
);
1878 DECL_INTERFACE_KNOWN (old_result
)
1879 = DECL_INTERFACE_KNOWN (new_result
);
1880 DECL_DECLARED_INLINE_P (old_result
)
1881 = DECL_DECLARED_INLINE_P (new_result
);
1882 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1883 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1888 DECL_DECLARED_INLINE_P (old_result
)
1889 |= DECL_DECLARED_INLINE_P (new_result
);
1890 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1891 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1892 check_redeclaration_exception_specification (newdecl
, olddecl
);
1896 /* If the new declaration is a definition, update the file and
1897 line information on the declaration, and also make
1898 the old declaration the same definition. */
1899 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1901 DECL_SOURCE_LOCATION (olddecl
)
1902 = DECL_SOURCE_LOCATION (old_result
)
1903 = DECL_SOURCE_LOCATION (newdecl
);
1904 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1905 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1908 DECL_ARGUMENTS (old_result
)
1909 = DECL_ARGUMENTS (new_result
);
1910 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1911 parm
= DECL_CHAIN (parm
))
1912 DECL_CONTEXT (parm
) = old_result
;
1921 /* Automatically handles default parameters. */
1922 tree oldtype
= TREE_TYPE (olddecl
);
1925 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1926 maybe_instantiate_noexcept (olddecl
);
1928 /* For typedefs use the old type, as the new type's DECL_NAME points
1929 at newdecl, which will be ggc_freed. */
1930 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1933 /* Merge the data types specified in the two decls. */
1934 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1936 if (VAR_P (newdecl
))
1938 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1939 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1940 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1941 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1942 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1943 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1945 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1946 if (DECL_LANG_SPECIFIC (olddecl
)
1947 && CP_DECL_THREADPRIVATE_P (olddecl
))
1949 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1950 if (!DECL_LANG_SPECIFIC (newdecl
))
1951 retrofit_lang_decl (newdecl
);
1953 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1954 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1958 /* Do this after calling `merge_types' so that default
1959 parameters don't confuse us. */
1960 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1961 check_redeclaration_exception_specification (newdecl
, olddecl
);
1962 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1964 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1965 check_default_args (newdecl
);
1967 /* Lay the type out, unless already done. */
1968 if (! same_type_p (newtype
, oldtype
)
1969 && TREE_TYPE (newdecl
) != error_mark_node
1970 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1971 layout_type (TREE_TYPE (newdecl
));
1973 if ((VAR_P (newdecl
)
1974 || TREE_CODE (newdecl
) == PARM_DECL
1975 || TREE_CODE (newdecl
) == RESULT_DECL
1976 || TREE_CODE (newdecl
) == FIELD_DECL
1977 || TREE_CODE (newdecl
) == TYPE_DECL
)
1978 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1979 layout_decl (newdecl
, 0);
1981 /* Merge the type qualifiers. */
1982 if (TREE_READONLY (newdecl
))
1983 TREE_READONLY (olddecl
) = 1;
1984 if (TREE_THIS_VOLATILE (newdecl
))
1985 TREE_THIS_VOLATILE (olddecl
) = 1;
1986 if (TREE_NOTHROW (newdecl
))
1987 TREE_NOTHROW (olddecl
) = 1;
1989 /* Merge deprecatedness. */
1990 if (TREE_DEPRECATED (newdecl
))
1991 TREE_DEPRECATED (olddecl
) = 1;
1993 /* Preserve function specific target and optimization options */
1994 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1996 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1997 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1998 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1999 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2001 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2002 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2003 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2004 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2007 /* Merge the initialization information. */
2008 if (DECL_INITIAL (newdecl
) == NULL_TREE
2009 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2011 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2012 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2013 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2015 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2016 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2020 /* Merge the section attribute.
2021 We want to issue an error if the sections conflict but that must be
2022 done later in decl_attributes since we are called before attributes
2024 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
2025 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
2027 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2029 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2030 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2031 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2032 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2033 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2034 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2035 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2036 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2037 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2038 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2039 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2040 /* Keep the old RTL. */
2041 COPY_DECL_RTL (olddecl
, newdecl
);
2043 else if (VAR_P (newdecl
)
2044 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2046 /* Keep the old RTL. We cannot keep the old RTL if the old
2047 declaration was for an incomplete object and the new
2048 declaration is not since many attributes of the RTL will
2050 COPY_DECL_RTL (olddecl
, newdecl
);
2053 /* If cannot merge, then use the new type and qualifiers,
2054 and don't preserve the old rtl. */
2057 /* Clean out any memory we had of the old declaration. */
2058 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2060 TREE_VALUE (oldstatic
) = error_mark_node
;
2062 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2063 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2064 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2065 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2068 /* Merge the storage class information. */
2069 merge_weak (newdecl
, olddecl
);
2071 if (DECL_ONE_ONLY (olddecl
))
2072 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
2074 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2075 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2076 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2077 if (! DECL_EXTERNAL (olddecl
))
2078 DECL_EXTERNAL (newdecl
) = 0;
2080 new_template_info
= NULL_TREE
;
2081 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2083 bool new_redefines_gnu_inline
= false;
2085 if (new_defines_function
2086 && ((DECL_INTERFACE_KNOWN (olddecl
)
2087 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2088 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2089 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2090 == FUNCTION_DECL
))))
2094 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2095 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2097 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2100 if (!new_redefines_gnu_inline
)
2102 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2103 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2104 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2106 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2107 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2108 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2110 /* If the OLDDECL is an instantiation and/or specialization,
2111 then the NEWDECL must be too. But, it may not yet be marked
2112 as such if the caller has created NEWDECL, but has not yet
2113 figured out that it is a redeclaration. */
2114 if (!DECL_USE_TEMPLATE (newdecl
))
2115 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2117 /* Don't really know how much of the language-specific
2118 values we should copy from old to new. */
2119 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2120 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2121 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2122 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2124 if (LANG_DECL_HAS_MIN (newdecl
))
2126 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2127 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2128 if (DECL_TEMPLATE_INFO (newdecl
))
2129 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2130 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2132 /* Only functions have these fields. */
2133 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2135 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2136 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2137 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2138 && DECL_HIDDEN_FRIEND_P (olddecl
)
2139 && newdecl_is_friend
);
2140 DECL_BEFRIENDING_CLASSES (newdecl
)
2141 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2142 DECL_BEFRIENDING_CLASSES (olddecl
));
2143 /* DECL_THUNKS is only valid for virtual functions,
2144 otherwise it is a DECL_FRIEND_CONTEXT. */
2145 if (DECL_VIRTUAL_P (newdecl
))
2146 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2148 /* Only variables have this field. */
2149 else if (VAR_P (newdecl
)
2150 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2151 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2154 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2158 /* Merge parameter attributes. */
2159 tree oldarg
, newarg
;
2160 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2161 newarg
= DECL_ARGUMENTS(newdecl
);
2163 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2164 DECL_ATTRIBUTES (newarg
)
2165 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2166 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2169 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2170 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2172 /* If newdecl is not a specialization, then it is not a
2173 template-related function at all. And that means that we
2174 should have exited above, returning 0. */
2175 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2177 if (DECL_ODR_USED (olddecl
))
2178 /* From [temp.expl.spec]:
2180 If a template, a member template or the member of a class
2181 template is explicitly specialized then that
2182 specialization shall be declared before the first use of
2183 that specialization that would cause an implicit
2184 instantiation to take place, in every translation unit in
2185 which such a use occurs. */
2186 error ("explicit specialization of %qD after first use",
2189 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2191 /* Don't propagate visibility from the template to the
2192 specialization here. We'll do that in determine_visibility if
2194 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2196 /* [temp.expl.spec/14] We don't inline explicit specialization
2197 just because the primary template says so. */
2199 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2200 the always_inline attribute. */
2201 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2202 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2204 if (DECL_DECLARED_INLINE_P (newdecl
))
2205 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2207 DECL_ATTRIBUTES (newdecl
)
2208 = remove_attribute ("always_inline",
2209 DECL_ATTRIBUTES (newdecl
));
2212 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2214 /* Never inline re-defined extern inline functions.
2215 FIXME: this could be better handled by keeping both
2216 function as separate declarations. */
2217 DECL_UNINLINABLE (newdecl
) = 1;
2221 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2222 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2224 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2226 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2227 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2229 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2230 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2231 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2232 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2235 /* Preserve abstractness on cloned [cd]tors. */
2236 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2238 /* Update newdecl's parms to point at olddecl. */
2239 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2240 parm
= DECL_CHAIN (parm
))
2241 DECL_CONTEXT (parm
) = olddecl
;
2245 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2246 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2247 COPY_DECL_RTL (newdecl
, olddecl
);
2249 if (! types_match
|| new_defines_function
)
2251 /* These need to be copied so that the names are available.
2252 Note that if the types do match, we'll preserve inline
2253 info and other bits, but if not, we won't. */
2254 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2255 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2257 /* If redeclaring a builtin function, it stays built in
2258 if newdecl is a gnu_inline definition, or if newdecl is just
2260 if (DECL_BUILT_IN (olddecl
)
2261 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2263 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2264 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2265 /* If we're keeping the built-in definition, keep the rtl,
2266 regardless of declaration matches. */
2267 COPY_DECL_RTL (olddecl
, newdecl
);
2268 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2270 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2273 /* If a compatible prototype of these builtin functions
2274 is seen, assume the runtime implements it with the
2275 expected semantics. */
2276 case BUILT_IN_STPCPY
:
2277 if (builtin_decl_explicit_p (fncode
))
2278 set_builtin_decl_implicit_p (fncode
, true);
2285 if (new_defines_function
)
2286 /* If defining a function declared with other language
2287 linkage, use the previously declared language linkage. */
2288 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2289 else if (types_match
)
2291 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2292 /* Don't clear out the arguments if we're just redeclaring a
2294 if (DECL_ARGUMENTS (olddecl
))
2295 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2298 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2299 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2301 /* Now preserve various other info from the definition. */
2302 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2303 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2304 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2305 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2307 /* Warn about conflicting visibility specifications. */
2308 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2309 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2310 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2312 warning_at (input_location
, OPT_Wattributes
,
2313 "%q+D: visibility attribute ignored because it", newdecl
);
2314 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2315 "conflicts with previous declaration here");
2317 /* Choose the declaration which specified visibility. */
2318 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2320 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2321 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2323 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2324 so keep this behavior. */
2325 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2327 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2328 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2330 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2331 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2333 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2334 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2336 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2337 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2338 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2340 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2341 with that from NEWDECL below. */
2342 if (DECL_LANG_SPECIFIC (olddecl
))
2344 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2345 != DECL_LANG_SPECIFIC (newdecl
));
2346 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2349 /* Merge the USED information. */
2350 if (TREE_USED (olddecl
))
2351 TREE_USED (newdecl
) = 1;
2352 else if (TREE_USED (newdecl
))
2353 TREE_USED (olddecl
) = 1;
2354 if (VAR_P (newdecl
))
2356 if (DECL_READ_P (olddecl
))
2357 DECL_READ_P (newdecl
) = 1;
2358 else if (DECL_READ_P (newdecl
))
2359 DECL_READ_P (olddecl
) = 1;
2361 if (DECL_PRESERVE_P (olddecl
))
2362 DECL_PRESERVE_P (newdecl
) = 1;
2363 else if (DECL_PRESERVE_P (newdecl
))
2364 DECL_PRESERVE_P (olddecl
) = 1;
2366 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2367 to olddecl and deleted. */
2368 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2369 && DECL_FUNCTION_VERSIONED (olddecl
))
2371 /* Set the flag for newdecl so that it gets copied to olddecl. */
2372 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2373 /* newdecl will be purged after copying to olddecl and is no longer
2375 delete_function_version (newdecl
);
2378 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2382 function_size
= sizeof (struct tree_decl_common
);
2384 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2385 (char *) newdecl
+ sizeof (struct tree_common
),
2386 function_size
- sizeof (struct tree_common
));
2388 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2389 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2390 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2391 if (new_template_info
)
2392 /* If newdecl is a template instantiation, it is possible that
2393 the following sequence of events has occurred:
2395 o A friend function was declared in a class template. The
2396 class template was instantiated.
2398 o The instantiation of the friend declaration was
2399 recorded on the instantiation list, and is newdecl.
2401 o Later, however, instantiate_class_template called pushdecl
2402 on the newdecl to perform name injection. But, pushdecl in
2403 turn called duplicate_decls when it discovered that another
2404 declaration of a global function with the same name already
2407 o Here, in duplicate_decls, we decided to clobber newdecl.
2409 If we're going to do that, we'd better make sure that
2410 olddecl, and not newdecl, is on the list of
2411 instantiations so that if we try to do the instantiation
2412 again we won't get the clobbered declaration. */
2413 reregister_specialization (newdecl
,
2419 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2420 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2421 (char *) newdecl
+ sizeof (struct tree_common
),
2422 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2423 switch (TREE_CODE (olddecl
))
2433 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2434 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2435 size
- sizeof (struct tree_decl_common
)
2436 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2440 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2441 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2442 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2443 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2447 DECL_UID (olddecl
) = olddecl_uid
;
2449 DECL_FRIEND_P (olddecl
) = 1;
2452 DECL_ANTICIPATED (olddecl
) = 1;
2453 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2456 /* NEWDECL contains the merged attribute lists.
2457 Update OLDDECL to be the same. */
2458 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2460 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2461 so that encode_section_info has a chance to look at the new decl
2462 flags and attributes. */
2463 if (DECL_RTL_SET_P (olddecl
)
2464 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2466 && TREE_STATIC (olddecl
))))
2467 make_decl_rtl (olddecl
);
2469 /* The NEWDECL will no longer be needed. Because every out-of-class
2470 declaration of a member results in a call to duplicate_decls,
2471 freeing these nodes represents in a significant savings. */
2474 bool found_clone
= false;
2475 /* Fix dangling reference. */
2476 FOR_EACH_CLONE (clone
, newdecl
)
2478 if (DECL_CLONED_FUNCTION (clone
) == newdecl
)
2483 if (DECL_ABSTRACT_ORIGIN (clone
) == newdecl
)
2496 /* Return zero if the declaration NEWDECL is valid
2497 when the declaration OLDDECL (assumed to be for the same name)
2498 has already been seen.
2499 Otherwise return an error message format string with a %s
2500 where the identifier should go. */
2503 redeclaration_error_message (tree newdecl
, tree olddecl
)
2505 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2507 /* Because C++ can put things into name space for free,
2508 constructs like "typedef struct foo { ... } foo"
2509 would look like an erroneous redeclaration. */
2510 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2513 return G_("redefinition of %q#D");
2515 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2517 /* If this is a pure function, its olddecl will actually be
2518 the original initialization to `0' (which we force to call
2519 abort()). Don't complain about redefinition in this case. */
2520 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2521 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2524 /* If both functions come from different namespaces, this is not
2525 a redeclaration - this is a conflict with a used function. */
2526 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2527 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2528 && ! decls_match (olddecl
, newdecl
))
2529 return G_("%qD conflicts with used function");
2531 /* We'll complain about linkage mismatches in
2532 warn_extern_redeclared_static. */
2534 /* Defining the same name twice is no good. */
2535 if (DECL_INITIAL (olddecl
) != NULL_TREE
2536 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2538 if (DECL_NAME (olddecl
) == NULL_TREE
)
2539 return G_("%q#D not declared in class");
2540 else if (!GNU_INLINE_P (olddecl
)
2541 || GNU_INLINE_P (newdecl
))
2542 return G_("redefinition of %q#D");
2545 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2547 bool olda
= GNU_INLINE_P (olddecl
);
2548 bool newa
= GNU_INLINE_P (newdecl
);
2553 return G_("%q+D redeclared inline with "
2554 "%<gnu_inline%> attribute");
2556 return G_("%q+D redeclared inline without "
2557 "%<gnu_inline%> attribute");
2561 check_abi_tag_redeclaration
2562 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2563 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2567 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2571 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2573 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2574 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2575 return G_("redefinition of %q#D");
2579 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2580 || (DECL_TEMPLATE_RESULT (newdecl
)
2581 == DECL_TEMPLATE_RESULT (olddecl
)))
2584 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2585 if (DECL_TEMPLATE_INFO (nt
))
2586 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2587 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2588 if (DECL_TEMPLATE_INFO (ot
))
2589 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2590 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2591 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2592 return G_("redefinition of %q#D");
2594 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2596 bool olda
= GNU_INLINE_P (ot
);
2597 bool newa
= GNU_INLINE_P (nt
);
2602 return G_("%q+D redeclared inline with "
2603 "%<gnu_inline%> attribute");
2605 return G_("%q+D redeclared inline without "
2606 "%<gnu_inline%> attribute");
2610 /* Core issue #226 (C++0x):
2612 If a friend function template declaration specifies a
2613 default template-argument, that declaration shall be a
2614 definition and shall be the only declaration of the
2615 function template in the translation unit. */
2616 if ((cxx_dialect
!= cxx98
)
2617 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2618 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2619 /*is_primary=*/true,
2620 /*is_partial=*/false,
2621 /*is_friend_decl=*/2))
2622 return G_("redeclaration of friend %q#D "
2623 "may not have default template arguments");
2627 else if (VAR_P (newdecl
)
2628 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2629 && (! DECL_LANG_SPECIFIC (olddecl
)
2630 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2631 || DECL_THREAD_LOCAL_P (newdecl
)))
2633 /* Only variables can be thread-local, and all declarations must
2634 agree on this property. */
2635 if (DECL_THREAD_LOCAL_P (newdecl
))
2636 return G_("thread-local declaration of %q#D follows "
2637 "non-thread-local declaration");
2639 return G_("non-thread-local declaration of %q#D follows "
2640 "thread-local declaration");
2642 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2644 /* The objects have been declared at namespace scope. If either
2645 is a member of an anonymous union, then this is an invalid
2646 redeclaration. For example:
2652 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2653 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2654 return G_("redeclaration of %q#D");
2655 /* If at least one declaration is a reference, there is no
2656 conflict. For example:
2662 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2664 /* Reject two definitions. */
2665 return G_("redefinition of %q#D");
2669 /* Objects declared with block scope: */
2670 /* Reject two definitions, and reject a definition
2671 together with an external reference. */
2672 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2673 return G_("redeclaration of %q#D");
2678 /* Hash and equality functions for the named_label table. */
2681 named_label_entry_hash (const void *data
)
2683 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2684 return DECL_UID (ent
->label_decl
);
2688 named_label_entry_eq (const void *a
, const void *b
)
2690 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2691 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2692 return ent_a
->label_decl
== ent_b
->label_decl
;
2695 /* Create a new label, named ID. */
2698 make_label_decl (tree id
, int local_p
)
2700 struct named_label_entry
*ent
;
2704 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2706 DECL_CONTEXT (decl
) = current_function_decl
;
2707 DECL_MODE (decl
) = VOIDmode
;
2708 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2710 /* Say where one reference is to the label, for the sake of the
2711 error if it is not defined. */
2712 DECL_SOURCE_LOCATION (decl
) = input_location
;
2714 /* Record the fact that this identifier is bound to this label. */
2715 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2717 /* Create the label htab for the function on demand. */
2719 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2720 named_label_entry_eq
, NULL
);
2722 /* Record this label on the list of labels used in this function.
2723 We do this before calling make_label_decl so that we get the
2724 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2725 ent
= ggc_alloc_cleared_named_label_entry ();
2726 ent
->label_decl
= decl
;
2728 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2729 gcc_assert (*slot
== NULL
);
2735 /* Look for a label named ID in the current function. If one cannot
2736 be found, create one. (We keep track of used, but undefined,
2737 labels, and complain about them at the end of a function.) */
2740 lookup_label_1 (tree id
)
2744 /* You can't use labels at global scope. */
2745 if (current_function_decl
== NULL_TREE
)
2747 error ("label %qE referenced outside of any function", id
);
2751 /* See if we've already got this label. */
2752 decl
= IDENTIFIER_LABEL_VALUE (id
);
2753 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2756 decl
= make_label_decl (id
, /*local_p=*/0);
2760 /* Wrapper for lookup_label_1. */
2763 lookup_label (tree id
)
2766 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2767 ret
= lookup_label_1 (id
);
2768 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2772 /* Declare a local label named ID. */
2775 declare_local_label (tree id
)
2778 cp_label_binding bind
;
2780 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2781 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2782 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2784 decl
= make_label_decl (id
, /*local_p=*/1);
2786 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2791 /* Returns nonzero if it is ill-formed to jump past the declaration of
2792 DECL. Returns 2 if it's also a real problem. */
2795 decl_jump_unsafe (tree decl
)
2797 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2798 with automatic storage duration is not in scope to a point where it is
2799 in scope is ill-formed unless the variable has scalar type, class type
2800 with a trivial default constructor and a trivial destructor, a
2801 cv-qualified version of one of these types, or an array of one of the
2802 preceding types and is declared without an initializer (8.5). */
2803 tree type
= TREE_TYPE (decl
);
2805 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2806 || type
== error_mark_node
)
2809 type
= strip_array_types (type
);
2811 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2814 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2820 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2823 identify_goto (tree decl
, const location_t
*locus
)
2826 permerror (input_location
, "jump to label %qD", decl
);
2828 permerror (input_location
, "jump to case label");
2830 permerror (*locus
, " from here");
2833 /* Check that a single previously seen jump to a newly defined label
2834 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2835 the jump context; NAMES are the names in scope in LEVEL at the jump
2836 context; LOCUS is the source position of the jump or 0. Returns
2837 true if all is well. */
2840 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2841 bool exited_omp
, const location_t
*locus
)
2843 cp_binding_level
*b
;
2844 bool identified
= false, saw_eh
= false, saw_omp
= false;
2848 identify_goto (decl
, locus
);
2849 error (" exits OpenMP structured block");
2850 identified
= saw_omp
= true;
2853 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2855 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2857 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2858 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2859 : TREE_CHAIN (new_decls
)))
2861 int problem
= decl_jump_unsafe (new_decls
);
2867 identify_goto (decl
, locus
);
2871 error (" crosses initialization of %q+#D", new_decls
);
2873 permerror (input_location
, " enters scope of %q+#D which has "
2874 "non-trivial destructor", new_decls
);
2879 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2883 identify_goto (decl
, locus
);
2886 if (b
->kind
== sk_try
)
2887 error (" enters try block");
2889 error (" enters catch block");
2892 if (b
->kind
== sk_omp
&& !saw_omp
)
2896 identify_goto (decl
, locus
);
2899 error (" enters OpenMP structured block");
2908 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2910 check_previous_goto_1 (decl
, use
->binding_level
,
2911 use
->names_in_scope
, use
->in_omp_scope
,
2912 &use
->o_goto_locus
);
2916 check_switch_goto (cp_binding_level
* level
)
2918 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2921 /* Check that a new jump to a label DECL is OK. Called by
2922 finish_goto_stmt. */
2925 check_goto (tree decl
)
2927 struct named_label_entry
*ent
, dummy
;
2928 bool saw_catch
= false, identified
= false;
2932 /* We can't know where a computed goto is jumping.
2933 So we assume that it's OK. */
2934 if (TREE_CODE (decl
) != LABEL_DECL
)
2937 /* We didn't record any information about this label when we created it,
2938 and there's not much point since it's trivial to analyze as a return. */
2939 if (decl
== cdtor_label
)
2942 dummy
.label_decl
= decl
;
2943 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2944 gcc_assert (ent
!= NULL
);
2946 /* If the label hasn't been defined yet, defer checking. */
2947 if (! DECL_INITIAL (decl
))
2949 struct named_label_use_entry
*new_use
;
2951 /* Don't bother creating another use if the last goto had the
2952 same data, and will therefore create the same set of errors. */
2954 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2957 new_use
= ggc_alloc_named_label_use_entry ();
2958 new_use
->binding_level
= current_binding_level
;
2959 new_use
->names_in_scope
= current_binding_level
->names
;
2960 new_use
->o_goto_locus
= input_location
;
2961 new_use
->in_omp_scope
= false;
2963 new_use
->next
= ent
->uses
;
2964 ent
->uses
= new_use
;
2968 if (ent
->in_try_scope
|| ent
->in_catch_scope
2969 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
2971 permerror (input_location
, "jump to label %q+D", decl
);
2972 permerror (input_location
, " from here");
2976 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
2978 int u
= decl_jump_unsafe (bad
);
2980 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2982 /* Can't skip init of __exception_info. */
2983 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2987 error (" skips initialization of %q+#D", bad
);
2989 permerror (input_location
, " enters scope of %q+#D which has "
2990 "non-trivial destructor", bad
);
2993 if (ent
->in_try_scope
)
2994 error (" enters try block");
2995 else if (ent
->in_catch_scope
&& !saw_catch
)
2996 error (" enters catch block");
2998 if (ent
->in_omp_scope
)
2999 error (" enters OpenMP structured block");
3000 else if (flag_openmp
)
3002 cp_binding_level
*b
;
3003 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3005 if (b
== ent
->binding_level
)
3007 if (b
->kind
== sk_omp
)
3011 permerror (input_location
, "jump to label %q+D", decl
);
3012 permerror (input_location
, " from here");
3015 error (" exits OpenMP structured block");
3022 /* Check that a return is ok wrt OpenMP structured blocks.
3023 Called by finish_return_stmt. Returns true if all is well. */
3026 check_omp_return (void)
3028 cp_binding_level
*b
;
3029 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3030 if (b
->kind
== sk_omp
)
3032 error ("invalid exit from OpenMP structured block");
3035 else if (b
->kind
== sk_function_parms
)
3040 /* Define a label, specifying the location in the source file.
3041 Return the LABEL_DECL node for the label. */
3044 define_label_1 (location_t location
, tree name
)
3046 struct named_label_entry
*ent
, dummy
;
3047 cp_binding_level
*p
;
3050 decl
= lookup_label (name
);
3052 dummy
.label_decl
= decl
;
3053 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
3054 gcc_assert (ent
!= NULL
);
3056 /* After labels, make any new cleanups in the function go into their
3057 own new (temporary) binding contour. */
3058 for (p
= current_binding_level
;
3059 p
->kind
!= sk_function_parms
;
3061 p
->more_cleanups_ok
= 0;
3063 if (name
== get_identifier ("wchar_t"))
3064 permerror (input_location
, "label named wchar_t");
3066 if (DECL_INITIAL (decl
) != NULL_TREE
)
3068 error ("duplicate label %qD", decl
);
3069 return error_mark_node
;
3073 struct named_label_use_entry
*use
;
3075 /* Mark label as having been defined. */
3076 DECL_INITIAL (decl
) = error_mark_node
;
3077 /* Say where in the source. */
3078 DECL_SOURCE_LOCATION (decl
) = location
;
3080 ent
->binding_level
= current_binding_level
;
3081 ent
->names_in_scope
= current_binding_level
->names
;
3083 for (use
= ent
->uses
; use
; use
= use
->next
)
3084 check_previous_goto (decl
, use
);
3091 /* Wrapper for define_label_1. */
3094 define_label (location_t location
, tree name
)
3097 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3098 ret
= define_label_1 (location
, name
);
3099 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3106 cp_binding_level
*level
;
3107 struct cp_switch
*next
;
3108 /* The SWITCH_STMT being built. */
3110 /* A splay-tree mapping the low element of a case range to the high
3111 element, or NULL_TREE if there is no high element. Used to
3112 determine whether or not a new case label duplicates an old case
3113 label. We need a tree, rather than simply a hash table, because
3114 of the GNU case range extension. */
3118 /* A stack of the currently active switch statements. The innermost
3119 switch statement is on the top of the stack. There is no need to
3120 mark the stack for garbage collection because it is only active
3121 during the processing of the body of a function, and we never
3122 collect at that point. */
3124 static struct cp_switch
*switch_stack
;
3126 /* Called right after a switch-statement condition is parsed.
3127 SWITCH_STMT is the switch statement being parsed. */
3130 push_switch (tree switch_stmt
)
3132 struct cp_switch
*p
= XNEW (struct cp_switch
);
3133 p
->level
= current_binding_level
;
3134 p
->next
= switch_stack
;
3135 p
->switch_stmt
= switch_stmt
;
3136 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3143 struct cp_switch
*cs
= switch_stack
;
3144 location_t switch_location
;
3146 /* Emit warnings as needed. */
3147 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3148 if (!processing_template_decl
)
3149 c_do_switch_warnings (cs
->cases
, switch_location
,
3150 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3151 SWITCH_STMT_COND (cs
->switch_stmt
));
3153 splay_tree_delete (cs
->cases
);
3154 switch_stack
= switch_stack
->next
;
3158 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3159 condition. Note that if TYPE and VALUE are already integral we don't
3160 really do the conversion because the language-independent
3161 warning/optimization code will work better that way. */
3164 case_conversion (tree type
, tree value
)
3166 if (value
== NULL_TREE
)
3169 if (cxx_dialect
>= cxx11
3170 && (SCOPED_ENUM_P (type
)
3171 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3173 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3174 type
= type_promotes_to (type
);
3175 value
= (perform_implicit_conversion_flags
3176 (type
, value
, tf_warning_or_error
,
3177 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3179 return cxx_constant_value (value
);
3182 /* Note that we've seen a definition of a case label, and complain if this
3183 is a bad place for one. */
3186 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3189 cp_binding_level
*p
;
3192 if (processing_template_decl
)
3196 /* For templates, just add the case label; we'll do semantic
3197 analysis at instantiation-time. */
3198 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3199 return add_stmt (build_case_label (low_value
, high_value
, label
));
3202 /* Find the condition on which this switch statement depends. */
3203 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3204 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3205 cond
= TREE_VALUE (cond
);
3207 if (!check_switch_goto (switch_stack
->level
))
3208 return error_mark_node
;
3210 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3212 low_value
= case_conversion (type
, low_value
);
3213 high_value
= case_conversion (type
, high_value
);
3215 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3216 low_value
, high_value
);
3218 /* After labels, make any new cleanups in the function go into their
3219 own new (temporary) binding contour. */
3220 for (p
= current_binding_level
;
3221 p
->kind
!= sk_function_parms
;
3223 p
->more_cleanups_ok
= 0;
3228 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3231 typename_hash (const void* k
)
3234 const_tree
const t
= (const_tree
) k
;
3236 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3237 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3242 typedef struct typename_info
{
3250 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3251 really of type `typename_info*' */
3254 typename_compare (const void * k1
, const void * k2
)
3256 const_tree
const t1
= (const_tree
) k1
;
3257 const typename_info
*const t2
= (const typename_info
*) k2
;
3259 return (TYPE_IDENTIFIER (t1
) == t2
->name
3260 && TYPE_CONTEXT (t1
) == t2
->scope
3261 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3262 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3263 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3266 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3267 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3269 Returns the new TYPENAME_TYPE. */
3271 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3274 build_typename_type (tree context
, tree name
, tree fullname
,
3275 enum tag_types tag_type
)
3283 if (typename_htab
== NULL
)
3284 typename_htab
= htab_create_ggc (61, &typename_hash
,
3285 &typename_compare
, NULL
);
3287 ti
.scope
= FROB_CONTEXT (context
);
3289 ti
.template_id
= fullname
;
3290 ti
.enum_p
= tag_type
== enum_type
;
3291 ti
.class_p
= (tag_type
== class_type
3292 || tag_type
== record_type
3293 || tag_type
== union_type
);
3294 hash
= (htab_hash_pointer (ti
.scope
)
3295 ^ htab_hash_pointer (ti
.name
));
3297 /* See if we already have this type. */
3298 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3303 /* Build the TYPENAME_TYPE. */
3304 t
= cxx_make_type (TYPENAME_TYPE
);
3305 TYPE_CONTEXT (t
) = ti
.scope
;
3306 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3307 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3308 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3310 /* Build the corresponding TYPE_DECL. */
3311 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3312 TYPE_NAME (TREE_TYPE (d
)) = d
;
3313 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3314 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3315 DECL_ARTIFICIAL (d
) = 1;
3317 /* Store it in the hash table. */
3320 /* TYPENAME_TYPEs must always be compared structurally, because
3321 they may or may not resolve down to another type depending on
3322 the currently open classes. */
3323 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3329 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3330 provided to name the type. Returns an appropriate type, unless an
3331 error occurs, in which case error_mark_node is returned. If we
3332 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3333 return that, rather than the _TYPE it corresponds to, in other
3334 cases we look through the type decl. If TF_ERROR is set, complain
3335 about errors, otherwise be quiet. */
3338 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3339 tsubst_flags_t complain
)
3345 if (name
== error_mark_node
3346 || context
== NULL_TREE
3347 || context
== error_mark_node
)
3348 return error_mark_node
;
3352 if (!(TYPE_LANG_SPECIFIC (name
)
3353 && (CLASSTYPE_IS_TEMPLATE (name
)
3354 || CLASSTYPE_USE_TEMPLATE (name
))))
3355 name
= TYPE_IDENTIFIER (name
);
3357 /* Create a TEMPLATE_ID_EXPR for the type. */
3358 name
= build_nt (TEMPLATE_ID_EXPR
,
3359 CLASSTYPE_TI_TEMPLATE (name
),
3360 CLASSTYPE_TI_ARGS (name
));
3362 else if (TREE_CODE (name
) == TYPE_DECL
)
3363 name
= DECL_NAME (name
);
3367 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3369 name
= TREE_OPERAND (name
, 0);
3370 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3371 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3372 else if (TREE_CODE (name
) == OVERLOAD
)
3374 if (complain
& tf_error
)
3375 error ("%qD is not a type", name
);
3376 return error_mark_node
;
3379 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3381 if (complain
& tf_error
)
3382 error ("%qD used without template parameters", name
);
3383 return error_mark_node
;
3385 gcc_assert (identifier_p (name
));
3386 gcc_assert (TYPE_P (context
));
3388 if (!MAYBE_CLASS_TYPE_P (context
))
3390 if (complain
& tf_error
)
3391 error ("%q#T is not a class", context
);
3392 return error_mark_node
;
3395 /* When the CONTEXT is a dependent type, NAME could refer to a
3396 dependent base class of CONTEXT. But look inside it anyway
3397 if CONTEXT is a currently open scope, in case it refers to a
3398 member of the current instantiation or a non-dependent base;
3399 lookup will stop when we hit a dependent base. */
3400 if (!dependent_scope_p (context
))
3401 /* We should only set WANT_TYPE when we're a nested typename type.
3402 Then we can give better diagnostics if we find a non-type. */
3403 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3407 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3408 return build_typename_type (context
, name
, fullname
, tag_type
);
3410 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3414 if (complain
& tf_error
)
3415 error (want_template
? G_("no class template named %q#T in %q#T")
3416 : G_("no type named %q#T in %q#T"), name
, context
);
3417 return error_mark_node
;
3420 /* Pull out the template from an injected-class-name (or multiple). */
3422 t
= maybe_get_template_decl_from_type_decl (t
);
3424 if (TREE_CODE (t
) == TREE_LIST
)
3426 if (complain
& tf_error
)
3428 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3429 print_candidates (t
);
3431 return error_mark_node
;
3434 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3436 if (complain
& tf_error
)
3437 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3439 return error_mark_node
;
3441 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3443 if (complain
& tf_error
)
3444 error ("%<typename %T::%D%> names %q#T, which is not a type",
3446 return error_mark_node
;
3449 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3450 return error_mark_node
;
3452 /* If we are currently parsing a template and if T is a typedef accessed
3453 through CONTEXT then we need to remember and check access of T at
3454 template instantiation time. */
3455 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3458 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3460 /*entering_scope=*/0,
3461 tf_warning_or_error
| tf_user
);
3463 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3466 maybe_record_typedef_use (t
);
3471 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3472 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3473 in which case error_mark_node is returned.
3475 If PARM_LIST is non-NULL, also make sure that the template parameter
3476 list of TEMPLATE_DECL matches.
3478 If COMPLAIN zero, don't complain about any errors that occur. */
3481 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3482 tsubst_flags_t complain
)
3488 name
= TYPE_IDENTIFIER (name
);
3489 else if (DECL_P (name
))
3490 name
= DECL_NAME (name
);
3491 gcc_assert (identifier_p (name
));
3493 if (!dependent_type_p (context
)
3494 || currently_open_class (context
))
3496 tree tmpl
= NULL_TREE
;
3498 if (MAYBE_CLASS_TYPE_P (context
))
3499 tmpl
= lookup_field (context
, name
, 0, false);
3501 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3502 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3504 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3506 if (complain
& tf_error
)
3507 error ("no class template named %q#T in %q#T", name
, context
);
3508 return error_mark_node
;
3512 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3514 if (complain
& tf_error
)
3516 error ("template parameters do not match template");
3517 error ("%q+D declared here", tmpl
);
3519 return error_mark_node
;
3522 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3524 return error_mark_node
;
3529 /* Build the UNBOUND_CLASS_TEMPLATE. */
3530 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3531 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3532 TREE_TYPE (t
) = NULL_TREE
;
3533 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3535 /* Build the corresponding TEMPLATE_DECL. */
3536 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3537 TYPE_NAME (TREE_TYPE (d
)) = d
;
3538 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3539 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3540 DECL_ARTIFICIAL (d
) = 1;
3541 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3548 /* Push the declarations of builtin types into the namespace.
3549 RID_INDEX is the index of the builtin type in the array
3550 RID_POINTERS. NAME is the name used when looking up the builtin
3551 type. TYPE is the _TYPE node for the builtin type. */
3554 record_builtin_type (enum rid rid_index
,
3558 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3559 tree tdecl
= NULL_TREE
;
3561 if ((int) rid_index
< (int) RID_MAX
)
3562 rname
= ridpointers
[(int) rid_index
];
3564 tname
= get_identifier (name
);
3566 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3567 eliminated. Built-in types should not be looked up name; their
3568 names are keywords that the parser can recognize. However, there
3569 is code in c-common.c that uses identifier_global_value to look
3570 up built-in types by name. */
3573 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3574 DECL_ARTIFICIAL (tdecl
) = 1;
3575 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3581 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3582 DECL_ARTIFICIAL (tdecl
) = 1;
3584 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3587 if (!TYPE_NAME (type
))
3588 TYPE_NAME (type
) = tdecl
;
3591 debug_hooks
->type_decl (tdecl
, 0);
3594 /* Record one of the standard Java types.
3595 * Declare it as having the given NAME.
3596 * If SIZE > 0, it is the size of one of the integral types;
3597 * otherwise it is the negative of the size of one of the other types. */
3600 record_builtin_java_type (const char* name
, int size
)
3605 type
= build_nonstandard_integer_type (size
, 0);
3606 type
= build_distinct_type_copy (type
);
3608 else if (size
> -32)
3611 /* "__java_char" or ""__java_boolean". */
3612 type
= build_nonstandard_integer_type (-size
, 1);
3613 type
= build_distinct_type_copy (type
);
3614 /* Get the signed type cached and attached to the unsigned type,
3615 so it doesn't get garbage-collected at "random" times,
3616 causing potential codegen differences out of different UIDs
3617 and different alias set numbers. */
3618 stype
= build_nonstandard_integer_type (-size
, 0);
3619 stype
= build_distinct_type_copy (stype
);
3620 TREE_CHAIN (type
) = stype
;
3621 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3624 { /* "__java_float" or ""__java_double". */
3625 type
= make_node (REAL_TYPE
);
3626 TYPE_PRECISION (type
) = - size
;
3629 record_builtin_type (RID_MAX
, name
, type
);
3630 decl
= TYPE_NAME (type
);
3632 /* Suppress generate debug symbol entries for these types,
3633 since for normal C++ they are just clutter.
3634 However, push_lang_context undoes this if extern "Java" is seen. */
3635 DECL_IGNORED_P (decl
) = 1;
3637 TYPE_FOR_JAVA (type
) = 1;
3641 /* Push a type into the namespace so that the back ends ignore it. */
3644 record_unknown_type (tree type
, const char* name
)
3646 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3647 TYPE_DECL
, get_identifier (name
), type
));
3648 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3649 DECL_IGNORED_P (decl
) = 1;
3650 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3651 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3652 TYPE_ALIGN (type
) = 1;
3653 TYPE_USER_ALIGN (type
) = 0;
3654 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3657 /* A string for which we should create an IDENTIFIER_NODE at
3660 typedef struct predefined_identifier
3662 /* The name of the identifier. */
3663 const char *const name
;
3664 /* The place where the IDENTIFIER_NODE should be stored. */
3666 /* Nonzero if this is the name of a constructor or destructor. */
3667 const int ctor_or_dtor_p
;
3668 } predefined_identifier
;
3670 /* Create all the predefined identifiers. */
3673 initialize_predefined_identifiers (void)
3675 const predefined_identifier
*pid
;
3677 /* A table of identifiers to create at startup. */
3678 static const predefined_identifier predefined_identifiers
[] = {
3679 { "C++", &lang_name_cplusplus
, 0 },
3680 { "C", &lang_name_c
, 0 },
3681 { "Java", &lang_name_java
, 0 },
3682 /* Some of these names have a trailing space so that it is
3683 impossible for them to conflict with names written by users. */
3684 { "__ct ", &ctor_identifier
, 1 },
3685 { "__base_ctor ", &base_ctor_identifier
, 1 },
3686 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3687 { "__dt ", &dtor_identifier
, 1 },
3688 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3689 { "__base_dtor ", &base_dtor_identifier
, 1 },
3690 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3691 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3692 { "nelts", &nelts_identifier
, 0 },
3693 { THIS_NAME
, &this_identifier
, 0 },
3694 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3695 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3696 { "_vptr", &vptr_identifier
, 0 },
3697 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3698 { "::", &global_scope_name
, 0 },
3699 { "std", &std_identifier
, 0 },
3703 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3705 *pid
->node
= get_identifier (pid
->name
);
3706 if (pid
->ctor_or_dtor_p
)
3707 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3711 /* Create the predefined scalar types of C,
3712 and some nodes representing standard constants (0, 1, (void *)0).
3713 Initialize the global binding level.
3714 Make definitions for built-in primitive functions. */
3717 cxx_init_decl_processing (void)
3720 tree void_ftype_ptr
;
3721 tree void_ftype_ptr_sizetype
;
3723 /* Create all the identifiers we need. */
3724 initialize_predefined_identifiers ();
3726 /* Create the global variables. */
3727 push_to_top_level ();
3729 current_function_decl
= NULL_TREE
;
3730 current_binding_level
= NULL
;
3731 /* Enter the global namespace. */
3732 gcc_assert (global_namespace
== NULL_TREE
);
3733 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3735 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3736 TREE_PUBLIC (global_namespace
) = 1;
3737 begin_scope (sk_namespace
, global_namespace
);
3739 if (flag_visibility_ms_compat
)
3740 default_visibility
= VISIBILITY_HIDDEN
;
3743 current_lang_name
= lang_name_c
;
3745 /* Create the `std' namespace. */
3746 push_namespace (std_identifier
);
3747 std_node
= current_namespace
;
3750 c_common_nodes_and_builtins ();
3752 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3753 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3754 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3755 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3756 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3757 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3758 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3759 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3761 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3763 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3764 truthvalue_type_node
= boolean_type_node
;
3765 truthvalue_false_node
= boolean_false_node
;
3766 truthvalue_true_node
= boolean_true_node
;
3768 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3769 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3770 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3773 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3776 delta_type_node
= ptrdiff_type_node
;
3777 vtable_index_type
= ptrdiff_type_node
;
3779 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3780 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3781 void_ftype_ptr
= build_function_type_list (void_type_node
,
3782 ptr_type_node
, NULL_TREE
);
3783 void_ftype_ptr_sizetype
= build_function_type_list (void_type_node
,
3788 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3789 void_ftype_ptr_sizetype
3790 = build_exception_variant (void_ftype_ptr_sizetype
, empty_except_spec
);
3792 /* C++ extensions */
3794 unknown_type_node
= make_node (LANG_TYPE
);
3795 record_unknown_type (unknown_type_node
, "unknown type");
3797 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3798 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3800 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3802 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3803 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3805 init_list_type_node
= make_node (LANG_TYPE
);
3806 record_unknown_type (init_list_type_node
, "init list");
3809 /* Make sure we get a unique function type, so we can give
3810 its pointer type a name. (This wins for gdb.) */
3811 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3812 TREE_TYPE (vfunc_type
) = integer_type_node
;
3813 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3814 layout_type (vfunc_type
);
3816 vtable_entry_type
= build_pointer_type (vfunc_type
);
3818 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3821 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3822 layout_type (vtbl_type_node
);
3823 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3824 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3825 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3826 layout_type (vtbl_ptr_type_node
);
3827 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3829 push_namespace (get_identifier ("__cxxabiv1"));
3830 abi_node
= current_namespace
;
3833 global_type_node
= make_node (LANG_TYPE
);
3834 record_unknown_type (global_type_node
, "global type");
3837 current_lang_name
= lang_name_cplusplus
;
3840 tree newattrs
, extvisattr
;
3841 tree newtype
, deltype
, deltype2
;
3842 tree ptr_ftype_sizetype
;
3846 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3847 if (cxx_dialect
== cxx98
)
3850 tree bad_alloc_type_node
;
3851 tree bad_alloc_decl
;
3853 push_namespace (std_identifier
);
3854 bad_alloc_id
= get_identifier ("bad_alloc");
3855 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3856 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3858 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3859 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3863 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3866 new_eh_spec
= noexcept_false_spec
;
3868 /* Ensure attribs.c is initialized. */
3870 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3872 newattrs
= tree_cons (get_identifier ("alloc_size"),
3873 build_tree_list (NULL_TREE
, integer_one_node
),
3875 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3876 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3877 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3878 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3879 deltype2
= build_exception_variant (void_ftype_ptr_sizetype
, empty_except_spec
);
3880 DECL_IS_OPERATOR_NEW (push_cp_library_fn (NEW_EXPR
, newtype
, 0)) = 1;
3881 DECL_IS_OPERATOR_NEW (push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0)) = 1;
3882 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3883 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3884 push_cp_library_fn (DELETE_EXPR
, deltype2
, ECF_NOTHROW
);
3886 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3887 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3888 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3889 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3890 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3891 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3892 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3893 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3897 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
3898 ECF_NORETURN
| ECF_NOTHROW
);
3900 /* Perform other language dependent initializations. */
3901 init_class_processing ();
3902 init_rtti_processing ();
3903 init_template_processing ();
3905 if (flag_exceptions
)
3906 init_exception_processing ();
3908 if (! supports_one_only ())
3911 make_fname_decl
= cp_make_fname_decl
;
3912 start_fname_decls ();
3914 /* Show we use EH for cleanups. */
3915 if (flag_exceptions
)
3916 using_eh_for_cleanups ();
3919 /* Generate an initializer for a function naming variable from
3920 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3921 filled in with the type of the init. */
3924 cp_fname_init (const char* name
, tree
*type_p
)
3926 tree domain
= NULL_TREE
;
3928 tree init
= NULL_TREE
;
3933 length
= strlen (name
);
3934 domain
= build_index_type (size_int (length
));
3935 init
= build_string (length
+ 1, name
);
3938 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3939 type
= build_cplus_array_type (type
, domain
);
3944 TREE_TYPE (init
) = type
;
3946 init
= error_mark_node
;
3951 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3952 the decl, LOC is the location to give the decl, NAME is the
3953 initialization string and TYPE_DEP indicates whether NAME depended
3954 on the type of the function. We make use of that to detect
3955 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3956 at the point of first use, so we mustn't push the decl now. */
3959 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3961 const char *const name
= (type_dep
&& processing_template_decl
3962 ? NULL
: fname_as_string (type_dep
));
3964 tree init
= cp_fname_init (name
, &type
);
3965 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3968 free (CONST_CAST (char *, name
));
3970 /* As we're using pushdecl_with_scope, we must set the context. */
3971 DECL_CONTEXT (decl
) = current_function_decl
;
3973 TREE_STATIC (decl
) = 1;
3974 TREE_READONLY (decl
) = 1;
3975 DECL_ARTIFICIAL (decl
) = 1;
3977 TREE_USED (decl
) = 1;
3979 if (current_function_decl
)
3981 cp_binding_level
*b
= current_binding_level
;
3982 if (b
->kind
== sk_function_parms
)
3983 return error_mark_node
;
3984 while (b
->level_chain
->kind
!= sk_function_parms
)
3986 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3987 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3988 LOOKUP_ONLYCONVERTING
);
3992 DECL_THIS_STATIC (decl
) = true;
3993 pushdecl_top_level_and_finish (decl
, init
);
4000 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4002 tree id
= DECL_NAME (decl
);
4003 const char *name
= IDENTIFIER_POINTER (id
);
4005 retrofit_lang_decl (decl
);
4007 DECL_ARTIFICIAL (decl
) = 1;
4008 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4009 SET_DECL_LANGUAGE (decl
, lang_c
);
4010 /* Runtime library routines are, by definition, available in an
4011 external shared object. */
4012 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4013 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4015 DECL_CONTEXT (decl
) = context
;
4018 pushdecl_top_level (decl
);
4022 /* A function in the user's namespace should have an explicit
4023 declaration before it is used. Mark the built-in function as
4024 anticipated but not actually declared. */
4025 if (name
[0] != '_' || name
[1] != '_')
4026 DECL_ANTICIPATED (decl
) = 1;
4027 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4029 size_t len
= strlen (name
);
4031 /* Treat __*_chk fortification functions as anticipated as well,
4032 unless they are __builtin_*. */
4033 if (len
> strlen ("___chk")
4034 && memcmp (name
+ len
- strlen ("_chk"),
4035 "_chk", strlen ("_chk") + 1) == 0)
4036 DECL_ANTICIPATED (decl
) = 1;
4043 cxx_builtin_function (tree decl
)
4045 tree id
= DECL_NAME (decl
);
4046 const char *name
= IDENTIFIER_POINTER (id
);
4047 /* All builtins that don't begin with an '_' should additionally
4048 go in the 'std' namespace. */
4051 tree decl2
= copy_node(decl
);
4052 push_namespace (std_identifier
);
4053 builtin_function_1 (decl2
, std_node
, false);
4057 return builtin_function_1 (decl
, NULL_TREE
, false);
4060 /* Like cxx_builtin_function, but guarantee the function is added to the global
4061 scope. This is to allow function specific options to add new machine
4062 dependent builtins when the target ISA changes via attribute((target(...)))
4063 which saves space on program startup if the program does not use non-generic
4067 cxx_builtin_function_ext_scope (tree decl
)
4070 tree id
= DECL_NAME (decl
);
4071 const char *name
= IDENTIFIER_POINTER (id
);
4072 /* All builtins that don't begin with an '_' should additionally
4073 go in the 'std' namespace. */
4076 tree decl2
= copy_node(decl
);
4077 push_namespace (std_identifier
);
4078 builtin_function_1 (decl2
, std_node
, true);
4082 return builtin_function_1 (decl
, NULL_TREE
, true);
4085 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4086 function. Not called directly. */
4089 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4092 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4093 DECL_EXTERNAL (fn
) = 1;
4094 TREE_PUBLIC (fn
) = 1;
4095 DECL_ARTIFICIAL (fn
) = 1;
4096 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4097 SET_DECL_LANGUAGE (fn
, lang_c
);
4098 /* Runtime library routines are, by definition, available in an
4099 external shared object. */
4100 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4101 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4102 set_call_expr_flags (fn
, ecf_flags
);
4106 /* Returns the _DECL for a library function with C++ linkage. */
4109 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4112 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4113 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4114 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4118 /* Like build_library_fn, but takes a C string instead of an
4122 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4124 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4127 /* Like build_cp_library_fn, but takes a C string instead of an
4131 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4133 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4137 /* Like build_library_fn, but also pushes the function so that we will
4138 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4139 may throw exceptions listed in RAISES. */
4142 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4147 type
= build_exception_variant (type
, raises
);
4149 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4150 pushdecl_top_level (fn
);
4154 /* Like build_cp_library_fn, but also pushes the function so that it
4155 will be found by normal lookup. */
4158 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4161 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4166 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4170 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4174 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4176 tree type
= build_function_type (void_type_node
, parmtypes
);
4177 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4180 /* Like push_library_fn, but also note that this function throws
4181 and does not return. Used for __throw_foo and the like. */
4184 push_throw_library_fn (tree name
, tree type
)
4186 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4190 /* When we call finish_struct for an anonymous union, we create
4191 default copy constructors and such. But, an anonymous union
4192 shouldn't have such things; this function undoes the damage to the
4193 anonymous union type T.
4195 (The reason that we create the synthesized methods is that we don't
4196 distinguish `union { int i; }' from `typedef union { int i; } U'.
4197 The first is an anonymous union; the second is just an ordinary
4201 fixup_anonymous_aggr (tree t
)
4205 /* Wipe out memory of synthesized methods. */
4206 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4207 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4208 TYPE_HAS_COPY_CTOR (t
) = 0;
4209 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4210 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4211 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4213 /* Splice the implicitly generated functions out of the TYPE_METHODS
4215 q
= &TYPE_METHODS (t
);
4218 if (DECL_ARTIFICIAL (*q
))
4219 *q
= TREE_CHAIN (*q
);
4221 q
= &DECL_CHAIN (*q
);
4224 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4225 if (TYPE_METHODS (t
))
4227 tree decl
= TYPE_MAIN_DECL (t
);
4229 if (TREE_CODE (t
) != UNION_TYPE
)
4230 error_at (DECL_SOURCE_LOCATION (decl
),
4231 "an anonymous struct cannot have function members");
4233 error_at (DECL_SOURCE_LOCATION (decl
),
4234 "an anonymous union cannot have function members");
4237 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4238 assignment operators (because they cannot have these methods themselves).
4239 For anonymous unions this is already checked because they are not allowed
4240 in any union, otherwise we have to check it. */
4241 if (TREE_CODE (t
) != UNION_TYPE
)
4245 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4246 if (TREE_CODE (field
) == FIELD_DECL
)
4248 type
= TREE_TYPE (field
);
4249 if (CLASS_TYPE_P (type
))
4251 if (TYPE_NEEDS_CONSTRUCTING (type
))
4252 error ("member %q+#D with constructor not allowed "
4253 "in anonymous aggregate", field
);
4254 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4255 error ("member %q+#D with destructor not allowed "
4256 "in anonymous aggregate", field
);
4257 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4258 error ("member %q+#D with copy assignment operator "
4259 "not allowed in anonymous aggregate", field
);
4265 /* Warn for an attribute located at LOCATION that appertains to the
4266 class type CLASS_TYPE that has not been properly placed after its
4267 class-key, in it class-specifier. */
4270 warn_misplaced_attr_for_class_type (source_location location
,
4273 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4275 warning_at (location
, OPT_Wattributes
,
4276 "attribute ignored in declaration "
4277 "of %q#T", class_type
);
4279 "attribute for %q#T must follow the %qs keyword",
4280 class_type
, class_key_or_enum_as_string (class_type
));
4283 /* Make sure that a declaration with no declarator is well-formed, i.e.
4284 just declares a tagged type or anonymous union.
4286 Returns the type declared; or NULL_TREE if none. */
4289 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4290 bool explicit_type_instantiation_p
)
4292 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4293 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4294 /* If a class, struct, or enum type is declared by the DECLSPECS
4295 (i.e, if a class-specifier, enum-specifier, or non-typename
4296 elaborated-type-specifier appears in the DECLSPECS),
4297 DECLARED_TYPE is set to the corresponding type. */
4298 tree declared_type
= NULL_TREE
;
4299 bool error_p
= false;
4301 if (declspecs
->multiple_types_p
)
4302 error ("multiple types in one declaration");
4303 else if (declspecs
->redefined_builtin_type
)
4305 if (!in_system_header_at (input_location
))
4306 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4307 "redeclaration of C++ built-in type %qT",
4308 declspecs
->redefined_builtin_type
);
4313 && TYPE_P (declspecs
->type
)
4314 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4315 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4316 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4317 declared_type
= declspecs
->type
;
4318 else if (declspecs
->type
== error_mark_node
)
4320 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4321 permerror (input_location
, "declaration does not declare anything");
4322 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4324 error ("%<auto%> can only be specified for variables "
4325 "or function declarations");
4326 return error_mark_node
;
4328 /* Check for an anonymous union. */
4329 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4330 && TYPE_ANONYMOUS_P (declared_type
))
4332 /* 7/3 In a simple-declaration, the optional init-declarator-list
4333 can be omitted only when declaring a class (clause 9) or
4334 enumeration (7.2), that is, when the decl-specifier-seq contains
4335 either a class-specifier, an elaborated-type-specifier with
4336 a class-key (9.1), or an enum-specifier. In these cases and
4337 whenever a class-specifier or enum-specifier is present in the
4338 decl-specifier-seq, the identifiers in these specifiers are among
4339 the names being declared by the declaration (as class-name,
4340 enum-names, or enumerators, depending on the syntax). In such
4341 cases, and except for the declaration of an unnamed bit-field (9.6),
4342 the decl-specifier-seq shall introduce one or more names into the
4343 program, or shall redeclare a name introduced by a previous
4344 declaration. [Example:
4345 enum { }; // ill-formed
4346 typedef class { }; // ill-formed
4350 error ("missing type-name in typedef-declaration");
4353 /* Anonymous unions are objects, so they can have specifiers. */;
4354 SET_ANON_AGGR_TYPE_P (declared_type
);
4356 if (TREE_CODE (declared_type
) != UNION_TYPE
4357 && !in_system_header_at (input_location
))
4358 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4363 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4364 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4365 error ("%qs can only be specified for functions",
4366 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4367 ? "inline" : "virtual");
4369 && (!current_class_type
4370 || current_scope () != current_class_type
))
4371 error ("%<friend%> can only be specified inside a class");
4372 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4373 error ("%<explicit%> can only be specified for constructors");
4374 else if (declspecs
->storage_class
)
4375 error ("a storage class can only be specified for objects "
4377 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4378 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4379 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4380 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4381 error ("qualifiers can only be specified for objects "
4383 else if (saw_typedef
)
4384 warning (0, "%<typedef%> was ignored in this declaration");
4385 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4386 error ("%<constexpr%> cannot be used for type declarations");
4389 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4392 if (!CLASS_TYPE_P (declared_type
)
4393 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4394 /* For a non-template class, use the name location. */
4395 loc
= location_of (declared_type
);
4397 /* For a template class (an explicit instantiation), use the
4398 current location. */
4399 loc
= input_location
;
4401 if (explicit_type_instantiation_p
)
4402 /* [dcl.attr.grammar]/4:
4404 No attribute-specifier-seq shall appertain to an explicit
4407 warning_at (loc
, OPT_Wattributes
,
4408 "attribute ignored in explicit instantiation %q#T",
4411 "no attribute can be applied to "
4412 "an explicit instantiation");
4415 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4418 return declared_type
;
4421 /* Called when a declaration is seen that contains no names to declare.
4422 If its type is a reference to a structure, union or enum inherited
4423 from a containing scope, shadow that tag name for the current scope
4424 with a forward reference.
4425 If its type defines a new named structure or union
4426 or defines an enum, it is valid but we need not do anything here.
4427 Otherwise, it is an error.
4429 C++: may have to grok the declspecs to learn about static,
4430 complain for anonymous unions.
4432 Returns the TYPE declared -- or NULL_TREE if none. */
4435 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4437 tree t
= check_tag_decl (declspecs
,
4438 /*explicit_type_instantiation_p=*/false);
4443 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4446 /* This is where the variables in an anonymous union are
4447 declared. An anonymous union declaration looks like:
4449 because there is no declarator after the union, the parser
4450 sends that declaration here. */
4451 if (ANON_AGGR_TYPE_P (t
))
4453 fixup_anonymous_aggr (t
);
4455 if (TYPE_FIELDS (t
))
4457 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4458 declspecs
, NORMAL
, 0, NULL
);
4459 finish_anon_union (decl
);
4466 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4469 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4470 const cp_declarator
*declarator
,
4471 bool is_template_arg
)
4475 enum decl_context context
4476 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4477 attrs
= type_specifiers
->attributes
;
4478 type_specifiers
->attributes
= NULL_TREE
;
4479 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4480 if (attrs
&& type
!= error_mark_node
)
4482 if (CLASS_TYPE_P (type
))
4483 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4484 "outside of definition", type
);
4485 else if (MAYBE_CLASS_TYPE_P (type
))
4486 /* A template type parameter or other dependent type. */
4487 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4488 "type %qT without an associated declaration", type
);
4490 cplus_decl_attributes (&type
, attrs
, 0);
4495 /* Process a DECLARATOR for a function-scope variable declaration,
4496 namespace-scope variable declaration, or function declaration.
4497 (Function definitions go through start_function; class member
4498 declarations appearing in the body of the class go through
4499 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4500 If an error occurs, the error_mark_node is returned instead.
4502 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4503 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4504 for an explicitly defaulted function, or SD_DELETED for an explicitly
4505 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4506 implicitly initialized via a default constructor. ATTRIBUTES and
4507 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4509 The scope represented by the context of the returned DECL is pushed
4510 (if it is not the global namespace) and is assigned to
4511 *PUSHED_SCOPE_P. The caller is then responsible for calling
4512 pop_scope on *PUSHED_SCOPE_P if it is set. */
4515 start_decl (const cp_declarator
*declarator
,
4516 cp_decl_specifier_seq
*declspecs
,
4519 tree prefix_attributes
,
4520 tree
*pushed_scope_p
)
4528 *pushed_scope_p
= NULL_TREE
;
4530 /* An object declared as __attribute__((deprecated)) suppresses
4531 warnings of uses of other deprecated items. */
4532 if (lookup_attribute ("deprecated", attributes
))
4533 deprecated_state
= DEPRECATED_SUPPRESS
;
4535 attributes
= chainon (attributes
, prefix_attributes
);
4537 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4540 deprecated_state
= DEPRECATED_NORMAL
;
4542 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4543 || decl
== error_mark_node
)
4544 return error_mark_node
;
4546 context
= CP_DECL_CONTEXT (decl
);
4547 if (context
!= global_namespace
)
4548 *pushed_scope_p
= push_scope (context
);
4551 /* Is it valid for this decl to have an initializer at all?
4552 If not, set INITIALIZED to zero, which will indirectly
4553 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4554 switch (TREE_CODE (decl
))
4557 error ("typedef %qD is initialized (use decltype instead)", decl
);
4558 return error_mark_node
;
4561 if (initialized
== SD_DELETED
)
4562 /* We'll handle the rest of the semantics later, but we need to
4563 set this now so it's visible to duplicate_decls. */
4564 DECL_DELETED_FN (decl
) = 1;
4573 if (! toplevel_bindings_p ()
4574 && DECL_EXTERNAL (decl
))
4575 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4577 DECL_EXTERNAL (decl
) = 0;
4578 if (toplevel_bindings_p ())
4579 TREE_STATIC (decl
) = 1;
4581 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4583 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4584 record_key_method_defined (decl
);
4586 /* If this is a typedef that names the class for linkage purposes
4587 (7.1.3p8), apply any attributes directly to the type. */
4588 if (TREE_CODE (decl
) == TYPE_DECL
4589 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4590 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4591 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4595 /* Set attributes here so if duplicate decl, will have proper attributes. */
4596 cplus_decl_attributes (&decl
, attributes
, flags
);
4598 /* Dllimported symbols cannot be defined. Static data members (which
4599 can be initialized in-class and dllimported) go through grokfield,
4600 not here, so we don't need to exclude those decls when checking for
4602 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4604 error ("definition of %q#D is marked %<dllimport%>", decl
);
4605 DECL_DLLIMPORT_P (decl
) = 0;
4608 /* If #pragma weak was used, mark the decl weak now. */
4609 if (!processing_template_decl
)
4610 maybe_apply_pragma_weak (decl
);
4612 if (TREE_CODE (decl
) == FUNCTION_DECL
4613 && DECL_DECLARED_INLINE_P (decl
)
4614 && DECL_UNINLINABLE (decl
)
4615 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4616 warning (0, "inline function %q+D given attribute noinline", decl
);
4618 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4622 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4623 if (field
== NULL_TREE
|| !VAR_P (field
))
4624 error ("%q#D is not a static member of %q#T", decl
, context
);
4627 if (DECL_CONTEXT (field
) != context
)
4629 if (!same_type_p (DECL_CONTEXT (field
), context
))
4630 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4631 "to be defined as %<%T::%D%>",
4632 DECL_CONTEXT (field
), DECL_NAME (decl
),
4633 context
, DECL_NAME (decl
));
4634 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4636 /* Static data member are tricky; an in-class initialization
4637 still doesn't provide a definition, so the in-class
4638 declaration will have DECL_EXTERNAL set, but will have an
4639 initialization. Thus, duplicate_decls won't warn
4640 about this situation, and so we check here. */
4641 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4642 error ("duplicate initialization of %qD", decl
);
4643 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4645 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4646 && !DECL_DECLARED_CONSTEXPR_P (field
))
4647 error ("%qD declared %<constexpr%> outside its class", field
);
4652 tree field
= check_classfn (context
, decl
,
4653 (processing_template_decl
4654 > template_class_depth (context
))
4655 ? current_template_parms
4657 if (field
&& field
!= error_mark_node
4658 && duplicate_decls (decl
, field
,
4659 /*newdecl_is_friend=*/false))
4663 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4664 DECL_IN_AGGR_P (decl
) = 0;
4665 /* Do not mark DECL as an explicit specialization if it was not
4666 already marked as an instantiation; a declaration should
4667 never be marked as a specialization unless we know what
4668 template is being specialized. */
4669 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4671 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4673 /* [temp.expl.spec] An explicit specialization of a static data
4674 member of a template is a definition if the declaration
4675 includes an initializer; otherwise, it is a declaration.
4677 We check for processing_specialization so this only applies
4678 to the new specialization syntax. */
4679 if (!initialized
&& processing_specialization
)
4680 DECL_EXTERNAL (decl
) = 1;
4683 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4684 /* Aliases are definitions. */
4686 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4690 was_public
= TREE_PUBLIC (decl
);
4692 /* Enter this declaration into the symbol table. */
4693 decl
= maybe_push_decl (decl
);
4695 if (processing_template_decl
)
4696 decl
= push_template_decl (decl
);
4697 if (decl
== error_mark_node
)
4698 return error_mark_node
;
4701 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4702 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4704 /* This is a const variable with implicit 'static'. Set
4705 DECL_THIS_STATIC so we can tell it from variables that are
4706 !TREE_PUBLIC because of the anonymous namespace. */
4707 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4708 DECL_THIS_STATIC (decl
) = 1;
4711 if (!processing_template_decl
&& VAR_P (decl
))
4712 start_decl_1 (decl
, initialized
);
4717 /* Process the declaration of a variable DECL. INITIALIZED is true
4718 iff DECL is explicitly initialized. (INITIALIZED is false if the
4719 variable is initialized via an implicitly-called constructor.)
4720 This function must be called for ordinary variables (including, for
4721 example, implicit instantiations of templates), but must not be
4722 called for template declarations. */
4725 start_decl_1 (tree decl
, bool initialized
)
4729 bool aggregate_definition_p
;
4731 gcc_assert (!processing_template_decl
);
4733 if (error_operand_p (decl
))
4736 gcc_assert (VAR_P (decl
));
4738 type
= TREE_TYPE (decl
);
4739 complete_p
= COMPLETE_TYPE_P (type
);
4740 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4742 /* If an explicit initializer is present, or if this is a definition
4743 of an aggregate, then we need a complete type at this point.
4744 (Scalars are always complete types, so there is nothing to
4745 check.) This code just sets COMPLETE_P; errors (if necessary)
4746 are issued below. */
4747 if ((initialized
|| aggregate_definition_p
)
4749 && COMPLETE_TYPE_P (complete_type (type
)))
4752 /* We will not yet have set TREE_READONLY on DECL if the type
4753 was "const", but incomplete, before this point. But, now, we
4754 have a complete type, so we can try again. */
4755 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4759 /* Is it valid for this decl to have an initializer at all? */
4761 /* Don't allow initializations for incomplete types except for
4762 arrays which might be completed by the initialization. */
4764 ; /* A complete type is ok. */
4765 else if (type_uses_auto (type
))
4766 ; /* An auto type is ok. */
4767 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4769 error ("variable %q#D has initializer but incomplete type", decl
);
4770 type
= TREE_TYPE (decl
) = error_mark_node
;
4772 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4774 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4775 error ("elements of array %q#D have incomplete type", decl
);
4776 /* else we already gave an error in start_decl. */
4779 else if (aggregate_definition_p
&& !complete_p
)
4781 if (type_uses_auto (type
))
4782 error ("declaration of %q#D has no initializer", decl
);
4784 error ("aggregate %q#D has incomplete type and cannot be defined",
4786 /* Change the type so that assemble_variable will give
4787 DECL an rtl we can live with: (mem (const_int 0)). */
4788 type
= TREE_TYPE (decl
) = error_mark_node
;
4791 /* Create a new scope to hold this declaration if necessary.
4792 Whether or not a new scope is necessary cannot be determined
4793 until after the type has been completed; if the type is a
4794 specialization of a class template it is not until after
4795 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4796 will be set correctly. */
4797 maybe_push_cleanup_level (type
);
4800 /* Handle initialization of references. DECL, TYPE, and INIT have the
4801 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4802 but will be set to a new CLEANUP_STMT if a temporary is created
4803 that must be destroyed subsequently.
4805 Returns an initializer expression to use to initialize DECL, or
4806 NULL if the initialization can be performed statically.
4808 Quotes on semantics can be found in ARM 8.4.3. */
4811 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4813 if (init
== NULL_TREE
)
4815 if ((DECL_LANG_SPECIFIC (decl
) == 0
4816 || DECL_IN_AGGR_P (decl
) == 0)
4817 && ! DECL_THIS_EXTERN (decl
))
4818 error ("%qD declared as reference but not initialized", decl
);
4822 if (TREE_CODE (init
) == TREE_LIST
)
4823 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4824 tf_warning_or_error
);
4826 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4827 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4828 /* Note: default conversion is only called in very special cases. */
4829 init
= decay_conversion (init
, tf_warning_or_error
);
4831 /* Convert INIT to the reference type TYPE. This may involve the
4832 creation of a temporary, whose lifetime must be the same as that
4833 of the reference. If so, a DECL_EXPR for the temporary will be
4834 added just after the DECL_EXPR for DECL. That's why we don't set
4835 DECL_INITIAL for local references (instead assigning to them
4836 explicitly); we need to allow the temporary to be initialized
4838 return initialize_reference (type
, init
, flags
,
4839 tf_warning_or_error
);
4842 /* Designated initializers in arrays are not supported in GNU C++.
4843 The parser cannot detect this error since it does not know whether
4844 a given brace-enclosed initializer is for a class type or for an
4845 array. This function checks that CE does not use a designated
4846 initializer. If it does, an error is issued. Returns true if CE
4847 is valid, i.e., does not have a designated initializer. */
4850 check_array_designated_initializer (constructor_elt
*ce
,
4851 unsigned HOST_WIDE_INT index
)
4853 /* Designated initializers for array elements are not supported. */
4856 /* The parser only allows identifiers as designated
4858 if (ce
->index
== error_mark_node
)
4860 error ("name used in a GNU-style designated "
4861 "initializer for an array");
4864 else if (identifier_p (ce
->index
))
4866 error ("name %qD used in a GNU-style designated "
4867 "initializer for an array", ce
->index
);
4871 ce
->index
= cxx_constant_value (ce
->index
);
4873 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4875 /* A C99 designator is OK if it matches the current index. */
4876 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4879 sorry ("non-trivial designated initializers not supported");
4890 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4891 array until we finish parsing the initializer. If that's the
4892 situation we're in, update DECL accordingly. */
4895 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4897 tree type
= TREE_TYPE (decl
);
4899 if (TREE_CODE (type
) == ARRAY_TYPE
4900 && TYPE_DOMAIN (type
) == NULL_TREE
4901 && TREE_CODE (decl
) != TYPE_DECL
)
4903 /* do_default is really a C-ism to deal with tentative definitions.
4904 But let's leave it here to ease the eventual merge. */
4905 int do_default
= !DECL_EXTERNAL (decl
);
4906 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4909 /* Check that there are no designated initializers in INIT, as
4910 those are not supported in GNU C++, and as the middle-end
4911 will crash if presented with a non-numeric designated
4913 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
4915 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4916 constructor_elt
*ce
;
4918 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
4919 if (!check_array_designated_initializer (ce
, i
))
4925 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4929 error ("initializer fails to determine size of %qD", decl
);
4931 else if (failure
== 2)
4935 error ("array size missing in %qD", decl
);
4937 /* If a `static' var's size isn't known, make it extern as
4938 well as static, so it does not get allocated. If it's not
4939 `static', then don't mark it extern; finish_incomplete_decl
4940 will give it a default size and it will get allocated. */
4941 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4942 DECL_EXTERNAL (decl
) = 1;
4944 else if (failure
== 3)
4946 error ("zero-size array %qD", decl
);
4950 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4952 relayout_decl (decl
);
4956 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4957 any appropriate error messages regarding the layout. */
4960 layout_var_decl (tree decl
)
4964 type
= TREE_TYPE (decl
);
4965 if (type
== error_mark_node
)
4968 /* If we haven't already laid out this declaration, do so now.
4969 Note that we must not call complete type for an external object
4970 because it's type might involve templates that we are not
4971 supposed to instantiate yet. (And it's perfectly valid to say
4972 `extern X x' for some incomplete type `X'.) */
4973 if (!DECL_EXTERNAL (decl
))
4974 complete_type (type
);
4975 if (!DECL_SIZE (decl
)
4976 && TREE_TYPE (decl
) != error_mark_node
4977 && (COMPLETE_TYPE_P (type
)
4978 || (TREE_CODE (type
) == ARRAY_TYPE
4979 && !TYPE_DOMAIN (type
)
4980 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4981 layout_decl (decl
, 0);
4983 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4985 /* An automatic variable with an incomplete type: that is an error.
4986 Don't talk about array types here, since we took care of that
4987 message in grokdeclarator. */
4988 error ("storage size of %qD isn%'t known", decl
);
4989 TREE_TYPE (decl
) = error_mark_node
;
4992 /* Keep this code around in case we later want to control debug info
4993 based on whether a type is "used". (jason 1999-11-11) */
4995 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4996 /* Let debugger know it should output info for this type. */
4997 note_debug_info_needed (ttype
);
4999 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5000 note_debug_info_needed (DECL_CONTEXT (decl
));
5003 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5004 && DECL_SIZE (decl
) != NULL_TREE
5005 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5007 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5008 constant_expression_warning (DECL_SIZE (decl
));
5011 error ("storage size of %qD isn%'t constant", decl
);
5012 TREE_TYPE (decl
) = error_mark_node
;
5017 /* If a local static variable is declared in an inline function, or if
5018 we have a weak definition, we must endeavor to create only one
5019 instance of the variable at link-time. */
5022 maybe_commonize_var (tree decl
)
5024 /* Static data in a function with comdat linkage also has comdat
5026 if (TREE_STATIC (decl
)
5027 /* Don't mess with __FUNCTION__. */
5028 && ! DECL_ARTIFICIAL (decl
)
5029 && DECL_FUNCTION_SCOPE_P (decl
)
5030 && vague_linkage_p (DECL_CONTEXT (decl
)))
5034 /* With weak symbols, we simply make the variable COMDAT;
5035 that will cause copies in multiple translations units to
5037 comdat_linkage (decl
);
5041 if (DECL_INITIAL (decl
) == NULL_TREE
5042 || DECL_INITIAL (decl
) == error_mark_node
)
5044 /* Without weak symbols, we can use COMMON to merge
5045 uninitialized variables. */
5046 TREE_PUBLIC (decl
) = 1;
5047 DECL_COMMON (decl
) = 1;
5051 /* While for initialized variables, we must use internal
5052 linkage -- which means that multiple copies will not
5054 TREE_PUBLIC (decl
) = 0;
5055 DECL_COMMON (decl
) = 0;
5056 warning_at (input_location
, 0,
5057 "sorry: semantics of inline function static "
5058 "data %q+#D are wrong (you%'ll wind up "
5059 "with multiple copies)", decl
);
5060 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5061 " you can work around this by removing "
5066 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
5067 /* Set it up again; we might have set DECL_INITIAL since the last
5069 comdat_linkage (decl
);
5072 /* Issue an error message if DECL is an uninitialized const variable. */
5075 check_for_uninitialized_const_var (tree decl
)
5077 tree type
= strip_array_types (TREE_TYPE (decl
));
5079 /* ``Unless explicitly declared extern, a const object does not have
5080 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5083 && TREE_CODE (type
) != REFERENCE_TYPE
5084 && CP_TYPE_CONST_P (type
)
5085 && !DECL_INITIAL (decl
))
5087 tree field
= default_init_uninitialized_part (type
);
5091 permerror (DECL_SOURCE_LOCATION (decl
),
5092 "uninitialized const %qD", decl
);
5094 if (CLASS_TYPE_P (type
))
5096 tree defaulted_ctor
;
5098 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5099 "%q#T has no user-provided default constructor", type
);
5100 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5102 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5103 "constructor is not user-provided because it is "
5104 "explicitly defaulted in the class body");
5105 inform (0, "and the implicitly-defined constructor does not "
5106 "initialize %q+#D", field
);
5111 /* Structure holding the current initializer being processed by reshape_init.
5112 CUR is a pointer to the current element being processed, END is a pointer
5113 after the last element present in the initializer. */
5114 typedef struct reshape_iterator_t
5116 constructor_elt
*cur
;
5117 constructor_elt
*end
;
5120 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5122 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5123 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5124 initialized. If there are no more such fields, the return value
5128 next_initializable_field (tree field
)
5131 && (TREE_CODE (field
) != FIELD_DECL
5132 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5133 || DECL_ARTIFICIAL (field
)))
5134 field
= DECL_CHAIN (field
);
5139 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5140 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5141 INTEGER_CST representing the size of the array minus one (the maximum index),
5142 or NULL_TREE if the array was declared without specifying the size. D is
5143 the iterator within the constructor. */
5146 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5147 tsubst_flags_t complain
)
5150 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5151 unsigned HOST_WIDE_INT max_index_cst
= 0;
5152 unsigned HOST_WIDE_INT index
;
5154 /* The initializer for an array is always a CONSTRUCTOR. */
5155 new_init
= build_constructor (init_list_type_node
, NULL
);
5159 /* Minus 1 is used for zero sized arrays. */
5160 if (integer_all_onesp (max_index
))
5163 if (tree_fits_uhwi_p (max_index
))
5164 max_index_cst
= tree_to_uhwi (max_index
);
5165 /* sizetype is sign extended, not zero extended. */
5167 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5170 /* Loop until there are no more initializers. */
5172 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5176 constructor_elt
*old_cur
= d
->cur
;
5178 check_array_designated_initializer (d
->cur
, index
);
5179 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5181 if (elt_init
== error_mark_node
)
5182 return error_mark_node
;
5183 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5184 size_int (index
), elt_init
);
5185 if (!TREE_CONSTANT (elt_init
))
5186 TREE_CONSTANT (new_init
) = false;
5188 /* This can happen with an invalid initializer (c++/54501). */
5189 if (d
->cur
== old_cur
&& !sized_array_p
)
5196 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5197 Parameters are the same of reshape_init_r. */
5200 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5202 tree max_index
= NULL_TREE
;
5204 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5206 if (TYPE_DOMAIN (type
))
5207 max_index
= array_type_nelts (type
);
5209 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5212 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5213 Parameters are the same of reshape_init_r. */
5216 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5218 tree max_index
= NULL_TREE
;
5220 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5222 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5224 tree value
= d
->cur
->value
;
5225 if (!same_type_p (TREE_TYPE (value
), type
))
5227 if (complain
& tf_error
)
5228 error ("invalid type %qT as initializer for a vector of type %qT",
5229 TREE_TYPE (d
->cur
->value
), type
);
5230 value
= error_mark_node
;
5236 /* For a vector, we initialize it as an array of the appropriate size. */
5237 if (TREE_CODE (type
) == VECTOR_TYPE
)
5238 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5240 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5243 /* Subroutine of reshape_init_r, processes the initializers for classes
5244 or union. Parameters are the same of reshape_init_r. */
5247 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5248 tsubst_flags_t complain
)
5253 gcc_assert (CLASS_TYPE_P (type
));
5255 /* The initializer for a class is always a CONSTRUCTOR. */
5256 new_init
= build_constructor (init_list_type_node
, NULL
);
5257 field
= next_initializable_field (TYPE_FIELDS (type
));
5263 An initializer for an aggregate member that is an
5264 empty class shall have the form of an empty
5265 initializer-list {}. */
5266 if (!first_initializer_p
)
5268 if (complain
& tf_error
)
5269 error ("initializer for %qT must be brace-enclosed", type
);
5270 return error_mark_node
;
5275 /* Loop through the initializable fields, gathering initializers. */
5276 while (d
->cur
!= d
->end
)
5279 constructor_elt
*old_cur
= d
->cur
;
5281 /* Handle designated initializers, as an extension. */
5284 if (d
->cur
->index
== error_mark_node
)
5285 return error_mark_node
;
5287 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5289 if (complain
& tf_error
)
5290 error ("%<[%E] =%> used in a GNU-style designated initializer"
5291 " for class %qT", d
->cur
->index
, type
);
5292 return error_mark_node
;
5295 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5296 /* We already reshaped this. */
5297 gcc_assert (d
->cur
->index
== field
);
5299 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5301 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5303 if (complain
& tf_error
)
5304 error ("%qT has no non-static data member named %qD", type
,
5306 return error_mark_node
;
5310 /* If we processed all the member of the class, we are done. */
5314 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5315 /*first_initializer_p=*/false, complain
);
5316 if (field_init
== error_mark_node
)
5317 return error_mark_node
;
5319 if (d
->cur
== old_cur
&& d
->cur
->index
)
5321 /* This can happen with an invalid initializer for a flexible
5322 array member (c++/54441). */
5323 if (complain
& tf_error
)
5324 error ("invalid initializer for %q#D", field
);
5325 return error_mark_node
;
5328 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5332 When a union is initialized with a brace-enclosed
5333 initializer, the braces shall only contain an
5334 initializer for the first member of the union. */
5335 if (TREE_CODE (type
) == UNION_TYPE
)
5338 field
= next_initializable_field (DECL_CHAIN (field
));
5344 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5345 designators are not valid; either complain or return true to indicate
5346 that reshape_init_r should return error_mark_node. */
5349 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5353 if (complain
& tf_error
)
5354 error ("C99 designator %qE outside aggregate initializer",
5362 /* Subroutine of reshape_init, which processes a single initializer (part of
5363 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5364 iterator within the CONSTRUCTOR which points to the initializer to process.
5365 FIRST_INITIALIZER_P is true if this is the first initializer of the
5366 outermost CONSTRUCTOR node. */
5369 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5370 tsubst_flags_t complain
)
5372 tree init
= d
->cur
->value
;
5374 if (error_operand_p (init
))
5375 return error_mark_node
;
5377 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5378 && has_designator_problem (d
, complain
))
5379 return error_mark_node
;
5381 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5383 /* A complex type can be initialized from one or two initializers,
5384 but braces are not elided. */
5386 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5388 if (CONSTRUCTOR_NELTS (init
) > 2)
5390 if (complain
& tf_error
)
5391 error ("too many initializers for %qT", type
);
5393 return error_mark_node
;
5396 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5398 vec
<constructor_elt
, va_gc
> *v
= 0;
5399 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5400 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5401 if (has_designator_problem (d
, complain
))
5402 return error_mark_node
;
5404 init
= build_constructor (init_list_type_node
, v
);
5409 /* A non-aggregate type is always initialized with a single
5411 if (!CP_AGGREGATE_TYPE_P (type
))
5413 /* It is invalid to initialize a non-aggregate type with a
5414 brace-enclosed initializer before C++0x.
5415 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5416 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5417 a CONSTRUCTOR (with a record type). */
5418 if (TREE_CODE (init
) == CONSTRUCTOR
5419 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5421 if (SCALAR_TYPE_P (type
))
5423 if (complain
& tf_error
)
5424 error ("braces around scalar initializer for type %qT", type
);
5425 init
= error_mark_node
;
5428 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5437 All implicit type conversions (clause _conv_) are considered when
5438 initializing the aggregate member with an initializer from an
5439 initializer-list. If the initializer can initialize a member,
5440 the member is initialized. Otherwise, if the member is itself a
5441 non-empty subaggregate, brace elision is assumed and the
5442 initializer is considered for the initialization of the first
5443 member of the subaggregate. */
5444 if (TREE_CODE (init
) != CONSTRUCTOR
5445 /* But don't try this for the first initializer, since that would be
5446 looking through the outermost braces; A a2 = { a1 }; is not a
5447 valid aggregate initialization. */
5448 && !first_initializer_p
5449 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5450 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5457 /* [dcl.init.string]
5459 A char array (whether plain char, signed char, or unsigned char)
5460 can be initialized by a string-literal (optionally enclosed in
5461 braces); a wchar_t array can be initialized by a wide
5462 string-literal (optionally enclosed in braces). */
5463 if (TREE_CODE (type
) == ARRAY_TYPE
5464 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5466 tree str_init
= init
;
5468 /* Strip one level of braces if and only if they enclose a single
5469 element (as allowed by [dcl.init.string]). */
5470 if (!first_initializer_p
5471 && TREE_CODE (str_init
) == CONSTRUCTOR
5472 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5474 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5477 /* If it's a string literal, then it's the initializer for the array
5478 as a whole. Otherwise, continue with normal initialization for
5479 array types (one value per array element). */
5480 if (TREE_CODE (str_init
) == STRING_CST
)
5482 if (has_designator_problem (d
, complain
))
5483 return error_mark_node
;
5489 /* The following cases are about aggregates. If we are not within a full
5490 initializer already, and there is not a CONSTRUCTOR, it means that there
5491 is a missing set of braces (that is, we are processing the case for
5492 which reshape_init exists). */
5493 if (!first_initializer_p
)
5495 if (TREE_CODE (init
) == CONSTRUCTOR
)
5497 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5498 /* There is no need to reshape pointer-to-member function
5499 initializers, as they are always constructed correctly
5500 by the front end. */
5502 else if (COMPOUND_LITERAL_P (init
))
5503 /* For a nested compound literal, there is no need to reshape since
5504 brace elision is not allowed. Even if we decided to allow it,
5505 we should add a call to reshape_init in finish_compound_literal,
5506 before calling digest_init, so changing this code would still
5507 not be necessary. */
5508 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5512 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5513 return reshape_init (type
, init
, complain
);
5517 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5521 /* Dispatch to specialized routines. */
5522 if (CLASS_TYPE_P (type
))
5523 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5524 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5525 return reshape_init_array (type
, d
, complain
);
5526 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5527 return reshape_init_vector (type
, d
, complain
);
5532 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5533 brace-enclosed aggregate initializer.
5535 INIT is the CONSTRUCTOR containing the list of initializers describing
5536 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5537 It may not presently match the shape of the TYPE; for example:
5539 struct S { int a; int b; };
5540 struct S a[] = { 1, 2, 3, 4 };
5542 Here INIT will hold a vector of four elements, rather than a
5543 vector of two elements, each itself a vector of two elements. This
5544 routine transforms INIT from the former form into the latter. The
5545 revised CONSTRUCTOR node is returned. */
5548 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5550 vec
<constructor_elt
, va_gc
> *v
;
5554 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5556 v
= CONSTRUCTOR_ELTS (init
);
5558 /* An empty constructor does not need reshaping, and it is always a valid
5560 if (vec_safe_is_empty (v
))
5563 /* Recurse on this CONSTRUCTOR. */
5565 d
.end
= d
.cur
+ v
->length ();
5567 new_init
= reshape_init_r (type
, &d
, true, complain
);
5568 if (new_init
== error_mark_node
)
5569 return error_mark_node
;
5571 /* Make sure all the element of the constructor were used. Otherwise,
5572 issue an error about exceeding initializers. */
5575 if (complain
& tf_error
)
5576 error ("too many initializers for %qT", type
);
5578 return error_mark_node
;
5584 /* Verify array initializer. Returns true if errors have been reported. */
5587 check_array_initializer (tree decl
, tree type
, tree init
)
5589 tree element_type
= TREE_TYPE (type
);
5591 /* The array type itself need not be complete, because the
5592 initializer may tell us how many elements are in the array.
5593 But, the elements of the array must be complete. */
5594 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5597 error ("elements of array %q#D have incomplete type", decl
);
5599 error ("elements of array %q#T have incomplete type", type
);
5602 /* A compound literal can't have variable size. */
5604 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5605 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5607 error ("variable-sized compound literal");
5613 /* Subroutine of check_initializer; args are passed down from that function.
5614 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5617 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5620 gcc_assert (stmts_are_full_exprs_p ());
5621 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5624 /* Verify INIT (the initializer for DECL), and record the
5625 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5626 grok_reference_init.
5628 If the return value is non-NULL, it is an expression that must be
5629 evaluated dynamically to initialize DECL. */
5632 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5634 tree type
= TREE_TYPE (decl
);
5635 tree init_code
= NULL
;
5638 /* Things that are going to be initialized need to have complete
5640 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5642 if (DECL_HAS_VALUE_EXPR_P (decl
))
5644 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5645 it doesn't have storage to be initialized. */
5646 gcc_assert (init
== NULL_TREE
);
5650 if (type
== error_mark_node
)
5651 /* We will have already complained. */
5654 if (TREE_CODE (type
) == ARRAY_TYPE
)
5656 if (check_array_initializer (decl
, type
, init
))
5659 else if (!COMPLETE_TYPE_P (type
))
5661 error ("%q#D has incomplete type", decl
);
5662 TREE_TYPE (decl
) = error_mark_node
;
5666 /* There is no way to make a variable-sized class type in GNU C++. */
5667 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5669 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5671 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5672 if (SCALAR_TYPE_P (type
))
5676 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5677 init
= build_zero_init (type
, NULL_TREE
, false);
5679 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5681 error ("scalar object %qD requires one element in initializer",
5683 TREE_TYPE (decl
) = error_mark_node
;
5689 if (TREE_CODE (decl
) == CONST_DECL
)
5691 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5693 DECL_INITIAL (decl
) = init
;
5695 gcc_assert (init
!= NULL_TREE
);
5698 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5700 else if (init
|| type_build_ctor_call (type
)
5701 || TREE_CODE (type
) == REFERENCE_TYPE
)
5703 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5705 init
= grok_reference_init (decl
, type
, init
, flags
);
5706 flags
|= LOOKUP_ALREADY_DIGESTED
;
5709 check_for_uninitialized_const_var (decl
);
5710 /* Do not reshape constructors of vectors (they don't need to be
5712 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5714 if (is_std_init_list (type
))
5716 init
= perform_implicit_conversion (type
, init
,
5717 tf_warning_or_error
);
5718 flags
|= LOOKUP_ALREADY_DIGESTED
;
5720 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5722 /* Don't reshape if the class has constructors. */
5723 if (cxx_dialect
== cxx98
)
5724 error ("in C++98 %qD must be initialized by constructor, "
5728 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5730 error ("opaque vector types cannot be initialized");
5731 init
= error_mark_node
;
5735 init
= reshape_init (type
, init
, tf_warning_or_error
);
5736 if (SCALAR_TYPE_P (type
))
5737 check_narrowing (type
, init
);
5741 /* If DECL has an array type without a specific bound, deduce the
5742 array size from the initializer. */
5743 maybe_deduce_size_from_array_init (decl
, init
);
5744 type
= TREE_TYPE (decl
);
5745 if (type
== error_mark_node
)
5748 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5749 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5750 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5751 && CP_AGGREGATE_TYPE_P (type
)
5752 && (CLASS_TYPE_P (type
)
5753 || !TYPE_NEEDS_CONSTRUCTING (type
)
5754 || type_has_extended_temps (type
))))
5756 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5758 /* A constructor call is a non-trivial initializer even if
5759 it isn't explicitly written. */
5760 if (TREE_SIDE_EFFECTS (init_code
))
5761 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5763 /* If this is a constexpr initializer, expand_default_init will
5764 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5765 case, pull the initializer back out and pass it down into
5766 store_init_value. */
5767 while (TREE_CODE (init_code
) == EXPR_STMT
5768 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5769 init_code
= TREE_OPERAND (init_code
, 0);
5770 if (TREE_CODE (init_code
) == INIT_EXPR
)
5772 init
= TREE_OPERAND (init_code
, 1);
5773 init_code
= NULL_TREE
;
5774 /* Don't call digest_init; it's unnecessary and will complain
5775 about aggregate initialization of non-aggregate classes. */
5776 flags
|= LOOKUP_ALREADY_DIGESTED
;
5778 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5780 /* Declared constexpr, but no suitable initializer; massage
5781 init appropriately so we can pass it into store_init_value
5783 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5784 init
= finish_compound_literal (type
, init
,
5785 tf_warning_or_error
);
5786 else if (CLASS_TYPE_P (type
)
5787 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5789 init
= build_functional_cast (type
, init
, tf_none
);
5790 if (TREE_CODE (init
) == TARGET_EXPR
)
5791 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5793 init_code
= NULL_TREE
;
5799 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5801 /* In aggregate initialization of a variable, each element
5802 initialization is a full-expression because there is no
5803 enclosing expression. */
5804 gcc_assert (stmts_are_full_exprs_p ());
5806 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5808 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5809 && DECL_INITIAL (decl
)
5810 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5811 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5812 warning (0, "array %qD initialized by parenthesized string literal %qE",
5813 decl
, DECL_INITIAL (decl
));
5819 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5820 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5821 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5822 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5825 check_for_uninitialized_const_var (decl
);
5828 if (init
&& init
!= error_mark_node
)
5829 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5831 if (init_code
&& DECL_IN_AGGR_P (decl
))
5833 static int explained
= 0;
5835 if (cxx_dialect
< cxx11
)
5836 error ("initializer invalid for static member with constructor");
5838 error ("non-constant in-class initialization invalid for static "
5839 "member %qD", decl
);
5842 inform (input_location
,
5843 "(an out of class initialization is required)");
5852 /* If DECL is not a local variable, give it RTL. */
5855 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5857 int toplev
= toplevel_bindings_p ();
5859 const char *filename
;
5861 /* Set the DECL_ASSEMBLER_NAME for the object. */
5864 /* The `register' keyword, when used together with an
5865 asm-specification, indicates that the variable should be
5866 placed in a particular register. */
5867 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5869 set_user_assembler_name (decl
, asmspec
);
5870 DECL_HARD_REGISTER (decl
) = 1;
5874 if (TREE_CODE (decl
) == FUNCTION_DECL
5875 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5876 set_builtin_user_assembler_name (decl
, asmspec
);
5877 set_user_assembler_name (decl
, asmspec
);
5881 /* Handle non-variables up front. */
5884 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5888 /* If we see a class member here, it should be a static data
5890 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5892 gcc_assert (TREE_STATIC (decl
));
5893 /* An in-class declaration of a static data member should be
5894 external; it is only a declaration, and not a definition. */
5895 if (init
== NULL_TREE
)
5896 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5899 /* We don't create any RTL for local variables. */
5900 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5903 /* We defer emission of local statics until the corresponding
5904 DECL_EXPR is expanded. */
5905 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5907 /* We try to defer namespace-scope static constants so that they are
5908 not emitted into the object file unnecessarily. */
5909 filename
= LOCATION_FILE (input_location
);
5910 if (!DECL_VIRTUAL_P (decl
)
5911 && TREE_READONLY (decl
)
5912 && DECL_INITIAL (decl
) != NULL_TREE
5913 && DECL_INITIAL (decl
) != error_mark_node
5915 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5917 && !TREE_PUBLIC (decl
))
5919 /* Fool with the linkage of static consts according to #pragma
5921 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5922 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5924 TREE_PUBLIC (decl
) = 1;
5925 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5930 /* Likewise for template instantiations. */
5931 else if (DECL_LANG_SPECIFIC (decl
)
5932 && DECL_IMPLICIT_INSTANTIATION (decl
))
5935 /* Capture the current module info. */
5936 if (L_IPO_COMP_MODE
)
5937 varpool_node_for_decl (decl
);
5939 /* If we're not deferring, go ahead and assemble the variable. */
5941 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5944 /* walk_tree helper for wrap_temporary_cleanups, below. */
5947 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5949 /* Stop at types or full-expression boundaries. */
5950 if (TYPE_P (*stmt_p
)
5951 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5957 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5959 tree guard
= (tree
)data
;
5960 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5962 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5963 /* Tell honor_protect_cleanup_actions to handle this as a separate
5965 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5967 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5973 /* We're initializing a local variable which has a cleanup GUARD. If there
5974 are any temporaries used in the initializer INIT of this variable, we
5975 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5976 variable will be cleaned up properly if one of them throws.
5978 Unfortunately, there's no way to express this properly in terms of
5979 nesting, as the regions for the temporaries overlap the region for the
5980 variable itself; if there are two temporaries, the variable needs to be
5981 the first thing destroyed if either of them throws. However, we only
5982 want to run the variable's cleanup if it actually got constructed. So
5983 we need to guard the temporary cleanups with the variable's cleanup if
5984 they are run on the normal path, but not if they are run on the
5985 exceptional path. We implement this by telling
5986 honor_protect_cleanup_actions to strip the variable cleanup from the
5987 exceptional path. */
5990 wrap_temporary_cleanups (tree init
, tree guard
)
5992 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5995 /* Generate code to initialize DECL (a local variable). */
5998 initialize_local_var (tree decl
, tree init
)
6000 tree type
= TREE_TYPE (decl
);
6004 gcc_assert (VAR_P (decl
)
6005 || TREE_CODE (decl
) == RESULT_DECL
);
6006 gcc_assert (!TREE_STATIC (decl
));
6008 if (DECL_SIZE (decl
) == NULL_TREE
)
6010 /* If we used it already as memory, it must stay in memory. */
6011 DECL_INITIAL (decl
) = NULL_TREE
;
6012 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6016 if (type
== error_mark_node
)
6019 /* Compute and store the initial value. */
6020 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6021 if (TREE_USED (type
))
6022 DECL_READ_P (decl
) = 1;
6024 /* Generate a cleanup, if necessary. */
6025 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6027 /* Perform the initialization. */
6030 if (TREE_CODE (init
) == INIT_EXPR
6031 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
6033 /* Stick simple initializers in DECL_INITIAL so that
6034 -Wno-init-self works (c++/34772). */
6035 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6036 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
6040 int saved_stmts_are_full_exprs_p
;
6042 /* If we're only initializing a single object, guard the
6043 destructors of any temporaries used in its initializer with
6044 its destructor. This isn't right for arrays because each
6045 element initialization is a full-expression. */
6046 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6047 wrap_temporary_cleanups (init
, cleanup
);
6049 gcc_assert (building_stmt_list_p ());
6050 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6051 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6052 finish_expr_stmt (init
);
6053 current_stmt_tree ()->stmts_are_full_exprs_p
=
6054 saved_stmts_are_full_exprs_p
;
6058 /* Set this to 0 so we can tell whether an aggregate which was
6059 initialized was ever used. Don't do this if it has a
6060 destructor, so we don't complain about the 'resource
6061 allocation is initialization' idiom. Now set
6062 attribute((unused)) on types so decls of that type will be
6063 marked used. (see TREE_USED, above.) */
6064 if (TYPE_NEEDS_CONSTRUCTING (type
)
6066 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6067 && DECL_NAME (decl
))
6068 TREE_USED (decl
) = 0;
6069 else if (already_used
)
6070 TREE_USED (decl
) = 1;
6073 finish_decl_cleanup (decl
, cleanup
);
6076 /* DECL is a VAR_DECL for a compiler-generated variable with static
6077 storage duration (like a virtual table) whose initializer is a
6078 compile-time constant. Initialize the variable and provide it to the
6082 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6085 gcc_assert (DECL_ARTIFICIAL (decl
));
6086 init
= build_constructor (TREE_TYPE (decl
), v
);
6087 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6088 DECL_INITIAL (decl
) = init
;
6089 DECL_INITIALIZED_P (decl
) = 1;
6090 determine_visibility (decl
);
6091 layout_var_decl (decl
);
6092 maybe_commonize_var (decl
);
6093 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6096 /* INIT is the initializer for a variable, as represented by the
6097 parser. Returns true iff INIT is type-dependent. */
6100 type_dependent_init_p (tree init
)
6102 if (TREE_CODE (init
) == TREE_LIST
)
6103 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6104 return any_type_dependent_elements_p (init
);
6105 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6106 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6108 vec
<constructor_elt
, va_gc
> *elts
;
6112 elts
= CONSTRUCTOR_ELTS (init
);
6113 nelts
= vec_safe_length (elts
);
6114 for (i
= 0; i
< nelts
; ++i
)
6115 if (type_dependent_init_p ((*elts
)[i
].value
))
6119 /* It must be a simple expression, e.g., int i = 3; */
6120 return type_dependent_expression_p (init
);
6125 /* INIT is the initializer for a variable, as represented by the
6126 parser. Returns true iff INIT is value-dependent. */
6129 value_dependent_init_p (tree init
)
6131 if (TREE_CODE (init
) == TREE_LIST
)
6132 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6133 return any_value_dependent_elements_p (init
);
6134 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6135 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6137 vec
<constructor_elt
, va_gc
> *elts
;
6141 elts
= CONSTRUCTOR_ELTS (init
);
6142 nelts
= vec_safe_length (elts
);
6143 for (i
= 0; i
< nelts
; ++i
)
6144 if (value_dependent_init_p ((*elts
)[i
].value
))
6148 /* It must be a simple expression, e.g., int i = 3; */
6149 return value_dependent_expression_p (init
);
6154 /* Finish processing of a declaration;
6155 install its line number and initial value.
6156 If the length of an array type is not known before,
6157 it must be determined now, from the initial value, or it is an error.
6159 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6160 true, then INIT is an integral constant expression.
6162 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6163 if the (init) syntax was used. */
6166 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6167 tree asmspec_tree
, int flags
)
6170 vec
<tree
, va_gc
> *cleanups
= NULL
;
6171 const char *asmspec
= NULL
;
6172 int was_readonly
= 0;
6173 bool var_definition_p
= false;
6176 if (decl
== error_mark_node
)
6181 error ("assignment (not initialization) in declaration");
6185 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6186 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6187 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6189 type
= TREE_TYPE (decl
);
6190 if (type
== error_mark_node
)
6193 /* If a name was specified, get the string. */
6194 if (at_namespace_scope_p ())
6195 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6196 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6197 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6199 if (current_class_type
6200 && CP_DECL_CONTEXT (decl
) == current_class_type
6201 && TYPE_BEING_DEFINED (current_class_type
)
6202 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6203 && (DECL_INITIAL (decl
) || init
))
6204 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6206 if (TREE_CODE (decl
) != FUNCTION_DECL
6207 && (auto_node
= type_uses_auto (type
)))
6210 if (init
== NULL_TREE
)
6212 if (DECL_LANG_SPECIFIC (decl
)
6213 && DECL_TEMPLATE_INSTANTIATION (decl
)
6214 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6216 /* init is null because we're deferring instantiating the
6217 initializer until we need it. Well, we need it now. */
6218 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6222 error ("declaration of %q#D has no initializer", decl
);
6223 TREE_TYPE (decl
) = error_mark_node
;
6227 if (TREE_CODE (d_init
) == TREE_LIST
)
6228 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6229 tf_warning_or_error
);
6230 d_init
= resolve_nondeduced_context (d_init
);
6231 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6233 if (type
== error_mark_node
)
6235 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6238 if (!ensure_literal_type_for_constexpr_object (decl
))
6239 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6242 && DECL_CLASS_SCOPE_P (decl
)
6243 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6244 check_static_variable_definition (decl
, type
);
6246 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6249 if (init
== ridpointers
[(int)RID_DELETE
])
6251 /* FIXME check this is 1st decl. */
6252 DECL_DELETED_FN (decl
) = 1;
6253 DECL_DECLARED_INLINE_P (decl
) = 1;
6254 DECL_INITIAL (decl
) = error_mark_node
;
6255 FOR_EACH_CLONE (clone
, decl
)
6257 DECL_DELETED_FN (clone
) = 1;
6258 DECL_DECLARED_INLINE_P (clone
) = 1;
6259 DECL_INITIAL (clone
) = error_mark_node
;
6263 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6265 if (defaultable_fn_check (decl
))
6266 DECL_DEFAULTED_FN (decl
) = 1;
6268 DECL_INITIAL (decl
) = NULL_TREE
;
6272 if (init
&& VAR_P (decl
))
6274 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6275 /* If DECL is a reference, then we want to know whether init is a
6276 reference constant; init_const_expr_p as passed tells us whether
6277 it's an rvalue constant. */
6278 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6279 init_const_expr_p
= potential_constant_expression (init
);
6280 if (init_const_expr_p
)
6282 /* Set these flags now for templates. We'll update the flags in
6283 store_init_value for instantiations. */
6284 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6285 if (decl_maybe_constant_var_p (decl
))
6286 TREE_CONSTANT (decl
) = 1;
6290 if (processing_template_decl
)
6292 bool type_dependent_p
;
6294 /* Add this declaration to the statement-tree. */
6295 if (at_function_scope_p ())
6296 add_decl_expr (decl
);
6298 type_dependent_p
= dependent_type_p (type
);
6300 if (check_for_bare_parameter_packs (init
))
6303 DECL_INITIAL (decl
) = NULL_TREE
;
6306 /* Generally, initializers in templates are expanded when the
6307 template is instantiated. But, if DECL is a variable constant
6308 then it can be used in future constant expressions, so its value
6309 must be available. */
6311 if (!VAR_P (decl
) || dependent_type_p (type
))
6312 /* We can't do anything if the decl has dependent type. */;
6314 && init_const_expr_p
6315 && !type_dependent_p
6316 && decl_maybe_constant_var_p (decl
)
6317 && !type_dependent_init_p (init
)
6318 && !value_dependent_init_p (init
))
6320 /* This variable seems to be a non-dependent constant, so process
6321 its initializer. If check_initializer returns non-null the
6322 initialization wasn't constant after all. */
6324 cleanups
= make_tree_vector ();
6325 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6326 if (init_code
== NULL_TREE
)
6328 release_tree_vector (cleanups
);
6330 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6332 /* Deduce array size even if the initializer is dependent. */
6333 maybe_deduce_size_from_array_init (decl
, init
);
6334 /* And complain about multiple initializers. */
6335 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6336 && !MAYBE_CLASS_TYPE_P (type
))
6337 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6338 tf_warning_or_error
);
6342 DECL_INITIAL (decl
) = init
;
6346 /* Just store non-static data member initializers for later. */
6347 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6348 DECL_INITIAL (decl
) = init
;
6350 /* Take care of TYPE_DECLs up front. */
6351 if (TREE_CODE (decl
) == TYPE_DECL
)
6353 if (type
!= error_mark_node
6354 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6356 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6357 warning (0, "shadowing previous type declaration of %q#D", decl
);
6358 set_identifier_type_value (DECL_NAME (decl
), decl
);
6361 /* If we have installed this as the canonical typedef for this
6362 type, and that type has not been defined yet, delay emitting
6363 the debug information for it, as we will emit it later. */
6364 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6365 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6366 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6368 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6373 /* A reference will be modified here, as it is initialized. */
6374 if (! DECL_EXTERNAL (decl
)
6375 && TREE_READONLY (decl
)
6376 && TREE_CODE (type
) == REFERENCE_TYPE
)
6379 TREE_READONLY (decl
) = 0;
6384 /* If this is a local variable that will need a mangled name,
6385 register it now. We must do this before processing the
6386 initializer for the variable, since the initialization might
6387 require a guard variable, and since the mangled name of the
6388 guard variable will depend on the mangled name of this
6390 if (DECL_FUNCTION_SCOPE_P (decl
)
6391 && TREE_STATIC (decl
)
6392 && !DECL_ARTIFICIAL (decl
))
6394 push_local_name (decl
);
6395 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6396 || DECL_DESTRUCTOR_P (current_function_decl
))
6397 /* Normally local_decls is populated during GIMPLE lowering,
6398 but [cd]tors are never actually compiled directly. We need
6399 to put statics on the list so we can deal with the label
6400 address extension. FIXME. */
6401 add_local_decl (cfun
, decl
);
6404 /* Convert the initializer to the type of DECL, if we have not
6405 already initialized DECL. */
6406 if (!DECL_INITIALIZED_P (decl
)
6407 /* If !DECL_EXTERNAL then DECL is being defined. In the
6408 case of a static data member initialized inside the
6409 class-specifier, there can be an initializer even if DECL
6410 is *not* defined. */
6411 && (!DECL_EXTERNAL (decl
) || init
))
6413 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6416 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6417 /* Allow libjava/prims.cc define primitive classes. */
6418 if (init
!= NULL_TREE
6419 || jclass
== NULL_TREE
6420 || TREE_CODE (jclass
) != TYPE_DECL
6421 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6422 || !same_type_ignoring_top_level_qualifiers_p
6423 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6424 error ("Java object %qD not allocated with %<new%>", decl
);
6427 cleanups
= make_tree_vector ();
6428 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6434 The memory occupied by any object of static storage
6435 duration is zero-initialized at program startup before
6436 any other initialization takes place.
6438 We cannot create an appropriate initializer until after
6439 the type of DECL is finalized. If DECL_INITIAL is set,
6440 then the DECL is statically initialized, and any
6441 necessary zero-initialization has already been performed. */
6442 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6443 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6444 /*nelts=*/NULL_TREE
,
6445 /*static_storage_p=*/true);
6446 /* Remember that the initialization for this variable has
6448 DECL_INITIALIZED_P (decl
) = 1;
6449 /* This declaration is the definition of this variable,
6450 unless we are initializing a static data member within
6451 the class specifier. */
6452 if (!DECL_EXTERNAL (decl
))
6453 var_definition_p
= true;
6455 /* If the variable has an array type, lay out the type, even if
6456 there is no initializer. It is valid to index through the
6457 array, and we must get TYPE_ALIGN set correctly on the array
6459 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6462 if (TREE_STATIC (decl
)
6463 && !at_function_scope_p ()
6464 && current_function_decl
== NULL
)
6465 /* So decl is a global variable or a static member of a
6466 non local class. Record the types it uses
6467 so that we can decide later to emit debug info for them. */
6468 record_types_used_by_current_var_decl (decl
);
6470 else if (TREE_CODE (decl
) == FIELD_DECL
6471 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6472 error ("non-static data member %qD has Java class type", decl
);
6474 /* Add this declaration to the statement-tree. This needs to happen
6475 after the call to check_initializer so that the DECL_EXPR for a
6476 reference temp is added before the DECL_EXPR for the reference itself. */
6477 if (DECL_FUNCTION_SCOPE_P (decl
))
6478 add_decl_expr (decl
);
6480 /* Let the middle end know about variables and functions -- but not
6481 static data members in uninstantiated class templates. */
6482 if (VAR_OR_FUNCTION_DECL_P (decl
))
6486 layout_var_decl (decl
);
6487 maybe_commonize_var (decl
);
6490 /* This needs to happen after the linkage is set. */
6491 determine_visibility (decl
);
6493 if (var_definition_p
&& TREE_STATIC (decl
))
6495 /* If a TREE_READONLY variable needs initialization
6496 at runtime, it is no longer readonly and we need to
6497 avoid MEM_READONLY_P being set on RTL created for it. */
6500 if (TREE_READONLY (decl
))
6501 TREE_READONLY (decl
) = 0;
6504 else if (was_readonly
)
6505 TREE_READONLY (decl
) = 1;
6507 /* Likewise if it needs destruction. */
6508 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6509 TREE_READONLY (decl
) = 0;
6512 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6514 /* Check for abstractness of the type. Notice that there is no
6515 need to strip array types here since the check for those types
6516 is already done within create_array_type_for_decl. */
6517 abstract_virtuals_error (decl
, type
);
6519 if (TREE_TYPE (decl
) == error_mark_node
)
6520 /* No initialization required. */
6522 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6526 if (init
== ridpointers
[(int)RID_DEFAULT
])
6528 /* An out-of-class default definition is defined at
6529 the point where it is explicitly defaulted. */
6530 if (DECL_DELETED_FN (decl
))
6531 maybe_explain_implicit_delete (decl
);
6532 else if (DECL_INITIAL (decl
) == error_mark_node
)
6533 synthesize_method (decl
);
6536 error ("function %q#D is initialized like a variable", decl
);
6538 /* else no initialization required. */
6540 else if (DECL_EXTERNAL (decl
)
6541 && ! (DECL_LANG_SPECIFIC (decl
)
6542 && DECL_NOT_REALLY_EXTERN (decl
)))
6545 DECL_INITIAL (decl
) = init
;
6547 /* A variable definition. */
6548 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6549 /* Initialize the local variable. */
6550 initialize_local_var (decl
, init
);
6552 /* If a variable is defined, and then a subsequent
6553 definition with external linkage is encountered, we will
6554 get here twice for the same variable. We want to avoid
6555 calling expand_static_init more than once. For variables
6556 that are not static data members, we can call
6557 expand_static_init only when we actually process the
6558 initializer. It is not legal to redeclare a static data
6559 member, so this issue does not arise in that case. */
6560 else if (var_definition_p
&& TREE_STATIC (decl
))
6561 expand_static_init (decl
, init
);
6564 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6565 reference, insert it in the statement-tree now. */
6569 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6570 push_cleanup (decl
, t
, false);
6571 release_tree_vector (cleanups
);
6575 TREE_READONLY (decl
) = 1;
6577 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6580 /* Returns a declaration for a VAR_DECL as if:
6582 extern "C" TYPE NAME;
6584 had been seen. Used to create compiler-generated global
6588 declare_global_var (tree name
, tree type
)
6592 push_to_top_level ();
6593 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6594 TREE_PUBLIC (decl
) = 1;
6595 DECL_EXTERNAL (decl
) = 1;
6596 DECL_ARTIFICIAL (decl
) = 1;
6597 /* If the user has explicitly declared this variable (perhaps
6598 because the code we are compiling is part of a low-level runtime
6599 library), then it is possible that our declaration will be merged
6600 with theirs by pushdecl. */
6601 decl
= pushdecl (decl
);
6602 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6603 pop_from_top_level ();
6608 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6609 if "__cxa_atexit" is not being used) corresponding to the function
6610 to be called when the program exits. */
6613 get_atexit_fn_ptr_type (void)
6617 if (!atexit_fn_ptr_type_node
)
6620 if (flag_use_cxa_atexit
6621 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6622 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6623 arg_type
= ptr_type_node
;
6625 /* The parameter to "atexit" is "void (*)(void)". */
6626 arg_type
= NULL_TREE
;
6628 fn_type
= build_function_type_list (void_type_node
,
6629 arg_type
, NULL_TREE
);
6630 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6633 return atexit_fn_ptr_type_node
;
6636 /* Returns a pointer to the `atexit' function. Note that if
6637 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6638 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6641 get_atexit_node (void)
6647 bool use_aeabi_atexit
;
6652 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6654 /* The declaration for `__cxa_atexit' is:
6656 int __cxa_atexit (void (*)(void *), void *, void *)
6658 We build up the argument types and then the function type
6660 tree argtype0
, argtype1
, argtype2
;
6662 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6663 /* First, build the pointer-to-function type for the first
6665 fn_ptr_type
= get_atexit_fn_ptr_type ();
6666 /* Then, build the rest of the argument types. */
6667 argtype2
= ptr_type_node
;
6668 if (use_aeabi_atexit
)
6670 argtype1
= fn_ptr_type
;
6671 argtype0
= ptr_type_node
;
6675 argtype1
= ptr_type_node
;
6676 argtype0
= fn_ptr_type
;
6678 /* And the final __cxa_atexit type. */
6679 fn_type
= build_function_type_list (integer_type_node
,
6680 argtype0
, argtype1
, argtype2
,
6682 if (use_aeabi_atexit
)
6683 name
= "__aeabi_atexit";
6685 name
= "__cxa_atexit";
6689 /* The declaration for `atexit' is:
6691 int atexit (void (*)());
6693 We build up the argument types and then the function type
6695 fn_ptr_type
= get_atexit_fn_ptr_type ();
6696 /* Build the final atexit type. */
6697 fn_type
= build_function_type_list (integer_type_node
,
6698 fn_ptr_type
, NULL_TREE
);
6702 /* Now, build the function declaration. */
6703 push_lang_context (lang_name_c
);
6704 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6705 mark_used (atexit_fndecl
);
6706 pop_lang_context ();
6707 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6712 /* Like get_atexit_node, but for thread-local cleanups. */
6715 get_thread_atexit_node (void)
6717 /* The declaration for `__cxa_thread_atexit' is:
6719 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6720 tree fn_type
= build_function_type_list (integer_type_node
,
6721 get_atexit_fn_ptr_type (),
6722 ptr_type_node
, ptr_type_node
,
6725 /* Now, build the function declaration. */
6726 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6727 ECF_LEAF
| ECF_NOTHROW
);
6728 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6731 /* Returns the __dso_handle VAR_DECL. */
6734 get_dso_handle_node (void)
6736 if (dso_handle_node
)
6737 return dso_handle_node
;
6739 /* Declare the variable. */
6740 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6743 #ifdef HAVE_GAS_HIDDEN
6744 if (dso_handle_node
!= error_mark_node
)
6746 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6747 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6751 return dso_handle_node
;
6754 /* Begin a new function with internal linkage whose job will be simply
6755 to destroy some particular variable. */
6757 static GTY(()) int start_cleanup_cnt
;
6760 start_cleanup_fn (void)
6765 bool use_cxa_atexit
= flag_use_cxa_atexit
6766 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6768 push_to_top_level ();
6770 /* No need to mangle this. */
6771 push_lang_context (lang_name_c
);
6773 /* Build the name of the function. */
6774 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6775 /* Build the function declaration. */
6776 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6777 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6778 /* It's a function with internal linkage, generated by the
6780 TREE_PUBLIC (fndecl
) = 0;
6781 DECL_ARTIFICIAL (fndecl
) = 1;
6782 /* Make the function `inline' so that it is only emitted if it is
6783 actually needed. It is unlikely that it will be inlined, since
6784 it is only called via a function pointer, but we avoid unnecessary
6785 emissions this way. */
6786 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6787 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6788 /* Build the parameter. */
6793 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6794 DECL_CONTEXT (parmdecl
) = fndecl
;
6795 TREE_USED (parmdecl
) = 1;
6796 DECL_READ_P (parmdecl
) = 1;
6797 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6801 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6803 pop_lang_context ();
6805 return current_function_decl
;
6808 /* Finish the cleanup function begun by start_cleanup_fn. */
6811 end_cleanup_fn (void)
6813 expand_or_defer_fn (finish_function (0));
6815 pop_from_top_level ();
6818 /* Generate code to handle the destruction of DECL, an object with
6819 static storage duration. */
6822 register_dtor_fn (tree decl
)
6829 bool ob_parm
, dso_parm
, use_dtor
;
6830 tree arg0
, arg1
, arg2
;
6833 type
= TREE_TYPE (decl
);
6834 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6835 return void_zero_node
;
6837 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6838 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6839 destructor to "__cxa_atexit"; we don't have to build a temporary
6840 function to do the cleanup. */
6841 dso_parm
= (flag_use_cxa_atexit
6842 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6843 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6844 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6849 /* Find the destructor. */
6850 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6851 gcc_assert (idx
>= 0);
6852 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6853 /* Make sure it is accessible. */
6854 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6855 tf_warning_or_error
);
6859 /* Call build_cleanup before we enter the anonymous function so
6860 that any access checks will be done relative to the current
6861 scope, rather than the scope of the anonymous function. */
6862 build_cleanup (decl
);
6864 /* Now start the function. */
6865 cleanup
= start_cleanup_fn ();
6867 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6868 to the original function, rather than the anonymous one. That
6869 will make the back end think that nested functions are in use,
6870 which causes confusion. */
6871 push_deferring_access_checks (dk_no_check
);
6872 fcall
= build_cleanup (decl
);
6873 pop_deferring_access_checks ();
6875 /* Create the body of the anonymous function. */
6876 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6877 finish_expr_stmt (fcall
);
6878 finish_compound_stmt (compound_stmt
);
6882 /* Call atexit with the cleanup function. */
6883 mark_used (cleanup
);
6884 cleanup
= build_address (cleanup
);
6886 if (DECL_THREAD_LOCAL_P (decl
))
6887 atex_node
= get_thread_atexit_node ();
6889 atex_node
= get_atexit_node ();
6893 /* We must convert CLEANUP to the type that "__cxa_atexit"
6895 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6896 /* "__cxa_atexit" will pass the address of DECL to the
6897 cleanup function. */
6899 addr
= build_address (decl
);
6900 /* The declared type of the parameter to "__cxa_atexit" is
6901 "void *". For plain "T*", we could just let the
6902 machinery in cp_build_function_call convert it -- but if the
6903 type is "cv-qualified T *", then we need to convert it
6904 before passing it in, to avoid spurious errors. */
6905 addr
= build_nop (ptr_type_node
, addr
);
6908 /* Since the cleanup functions we build ignore the address
6909 they're given, there's no reason to pass the actual address
6910 in, and, in general, it's cheaper to pass NULL than any
6912 addr
= null_pointer_node
;
6915 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6916 tf_warning_or_error
);
6918 /* Just pass NULL to the dso handle parm if we don't actually
6919 have a DSO handle on this target. */
6920 arg2
= null_pointer_node
;
6926 if (!DECL_THREAD_LOCAL_P (decl
)
6927 && targetm
.cxx
.use_aeabi_atexit ())
6943 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6944 arg0
, arg1
, arg2
, NULL_TREE
);
6947 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6948 is its initializer. Generate code to handle the construction
6949 and destruction of DECL. */
6952 expand_static_init (tree decl
, tree init
)
6954 gcc_assert (VAR_P (decl
));
6955 gcc_assert (TREE_STATIC (decl
));
6957 /* Some variables require no dynamic initialization. */
6959 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6961 /* Make sure the destructor is callable. */
6962 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6966 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
6967 && !DECL_FUNCTION_SCOPE_P (decl
))
6970 error ("non-local variable %qD declared %<__thread%> "
6971 "needs dynamic initialization", decl
);
6973 error ("non-local variable %qD declared %<__thread%> "
6974 "has a non-trivial destructor", decl
);
6975 static bool informed
;
6978 inform (DECL_SOURCE_LOCATION (decl
),
6979 "C++11 %<thread_local%> allows dynamic initialization "
6986 if (DECL_FUNCTION_SCOPE_P (decl
))
6988 /* Emit code to perform this initialization but once. */
6989 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6990 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6991 tree guard
, guard_addr
;
6993 /* We don't need thread-safety code for thread-local vars. */
6994 bool thread_guard
= (flag_threadsafe_statics
6995 && !DECL_THREAD_LOCAL_P (decl
));
6997 /* Emit code to perform this initialization but once. This code
7000 static <type> guard;
7001 if (!guard.first_byte) {
7002 if (__cxa_guard_acquire (&guard)) {
7005 // Do initialization.
7006 flag = true; __cxa_guard_release (&guard);
7007 // Register variable for destruction at end of program.
7009 if (!flag) __cxa_guard_abort (&guard);
7013 Note that the `flag' variable is only set to 1 *after* the
7014 initialization is complete. This ensures that an exception,
7015 thrown during the construction, will cause the variable to
7016 reinitialized when we pass through this code again, as per:
7020 If the initialization exits by throwing an exception, the
7021 initialization is not complete, so it will be tried again
7022 the next time control enters the declaration.
7024 This process should be thread-safe, too; multiple threads
7025 should not be able to initialize the variable more than
7028 /* Create the guard variable. */
7029 guard
= get_guard (decl
);
7031 /* This optimization isn't safe on targets with relaxed memory
7032 consistency. On such targets we force synchronization in
7033 __cxa_guard_acquire. */
7034 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7036 /* Begin the conditional initialization. */
7037 if_stmt
= begin_if_stmt ();
7038 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
7039 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7044 tree vfntype
= NULL_TREE
;
7045 tree acquire_name
, release_name
, abort_name
;
7046 tree acquire_fn
, release_fn
, abort_fn
;
7047 guard_addr
= build_address (guard
);
7049 acquire_name
= get_identifier ("__cxa_guard_acquire");
7050 release_name
= get_identifier ("__cxa_guard_release");
7051 abort_name
= get_identifier ("__cxa_guard_abort");
7052 acquire_fn
= identifier_global_value (acquire_name
);
7053 release_fn
= identifier_global_value (release_name
);
7054 abort_fn
= identifier_global_value (abort_name
);
7056 acquire_fn
= push_library_fn
7057 (acquire_name
, build_function_type_list (integer_type_node
,
7058 TREE_TYPE (guard_addr
),
7060 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7061 if (!release_fn
|| !abort_fn
)
7062 vfntype
= build_function_type_list (void_type_node
,
7063 TREE_TYPE (guard_addr
),
7066 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7067 ECF_NOTHROW
| ECF_LEAF
);
7069 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7070 ECF_NOTHROW
| ECF_LEAF
);
7072 inner_if_stmt
= begin_if_stmt ();
7073 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7076 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7077 begin
= get_target_expr (boolean_false_node
);
7078 flag
= TARGET_EXPR_SLOT (begin
);
7080 TARGET_EXPR_CLEANUP (begin
)
7081 = build3 (COND_EXPR
, void_type_node
, flag
,
7083 build_call_n (abort_fn
, 1, guard_addr
));
7084 CLEANUP_EH_ONLY (begin
) = 1;
7086 /* Do the initialization itself. */
7087 init
= add_stmt_to_compound (begin
, init
);
7088 init
= add_stmt_to_compound
7089 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7090 init
= add_stmt_to_compound
7091 (init
, build_call_n (release_fn
, 1, guard_addr
));
7094 init
= add_stmt_to_compound (init
, set_guard (guard
));
7096 /* Use atexit to register a function for destroying this static
7098 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7100 finish_expr_stmt (init
);
7104 finish_compound_stmt (inner_then_clause
);
7105 finish_then_clause (inner_if_stmt
);
7106 finish_if_stmt (inner_if_stmt
);
7109 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7111 finish_compound_stmt (then_clause
);
7112 finish_then_clause (if_stmt
);
7113 finish_if_stmt (if_stmt
);
7116 else if (DECL_THREAD_LOCAL_P (decl
))
7117 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7119 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7123 /* Make TYPE a complete type based on INITIAL_VALUE.
7124 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7125 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7126 3 if the initializer list is empty (in pedantic mode). */
7129 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7132 tree type
, elt_type
;
7134 /* Don't get confused by a CONSTRUCTOR for some other type. */
7135 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7136 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7141 unsigned HOST_WIDE_INT i
;
7144 /* An array of character type can be initialized from a
7145 brace-enclosed string constant.
7147 FIXME: this code is duplicated from reshape_init. Probably
7148 we should just call reshape_init here? */
7149 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7150 && TREE_CODE (initial_value
) == CONSTRUCTOR
7151 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7153 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7154 tree value
= (*v
)[0].value
;
7156 if (TREE_CODE (value
) == STRING_CST
7157 && v
->length () == 1)
7158 initial_value
= value
;
7161 /* If any of the elements are parameter packs, we can't actually
7162 complete this type now because the array size is dependent. */
7163 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7165 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7168 if (PACK_EXPANSION_P (value
))
7174 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7176 /* We can create the array before the element type is complete, which
7177 means that we didn't have these two bits set in the original type
7178 either. In completing the type, we are expected to propagate these
7179 bits. See also complete_type which does the same thing for arrays
7182 if (TYPE_DOMAIN (type
))
7184 elt_type
= TREE_TYPE (type
);
7185 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7186 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7187 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7193 /* As above, but either give an error or reject zero-size arrays, depending
7197 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7198 bool do_default
, tsubst_flags_t complain
)
7201 bool sfinae
= !(complain
& tf_error
);
7202 /* In SFINAE context we can't be lenient about zero-size arrays. */
7205 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7211 /* Not an error. */;
7212 else if (failure
== 1)
7213 error ("initializer fails to determine size of %qT", *ptype
);
7214 else if (failure
== 2)
7217 error ("array size missing in %qT", *ptype
);
7219 else if (failure
== 3)
7220 error ("zero-size array %qT", *ptype
);
7221 *ptype
= error_mark_node
;
7226 /* Return zero if something is declared to be a member of type
7227 CTYPE when in the context of CUR_TYPE. STRING is the error
7228 message to print in that case. Otherwise, quietly return 1. */
7231 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7233 if (ctype
&& ctype
!= cur_type
)
7235 if (flags
== DTOR_FLAG
)
7236 error ("destructor for alien class %qT cannot be a member", ctype
);
7238 error ("constructor for alien class %qT cannot be a member", ctype
);
7244 /* Subroutine of `grokdeclarator'. */
7246 /* Generate errors possibly applicable for a given set of specifiers.
7247 This is for ARM $7.1.2. */
7250 bad_specifiers (tree object
,
7251 enum bad_spec_place type
,
7262 error ("%qD declared as a %<virtual%> variable", object
);
7264 error ("%qD declared as an %<inline%> variable", object
);
7266 error ("%<const%> and %<volatile%> function specifiers on "
7267 "%qD invalid in variable declaration", object
);
7271 error ("%qD declared as a %<virtual%> parameter", object
);
7273 error ("%qD declared as an %<inline%> parameter", object
);
7275 error ("%<const%> and %<volatile%> function specifiers on "
7276 "%qD invalid in parameter declaration", object
);
7280 error ("%qD declared as a %<virtual%> type", object
);
7282 error ("%qD declared as an %<inline%> type", object
);
7284 error ("%<const%> and %<volatile%> function specifiers on "
7285 "%qD invalid in type declaration", object
);
7289 error ("%qD declared as a %<virtual%> field", object
);
7291 error ("%qD declared as an %<inline%> field", object
);
7293 error ("%<const%> and %<volatile%> function specifiers on "
7294 "%qD invalid in field declaration", object
);
7300 error ("%q+D declared as a friend", object
);
7302 && (TREE_CODE (object
) == TYPE_DECL
7303 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7304 && !TYPE_REFFN_P (TREE_TYPE (object
))
7305 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7306 error ("%q+D declared with an exception specification", object
);
7309 /* DECL is a member function or static data member and is presently
7310 being defined. Check that the definition is taking place in a
7314 check_class_member_definition_namespace (tree decl
)
7316 /* These checks only apply to member functions and static data
7318 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7319 /* We check for problems with specializations in pt.c in
7320 check_specialization_namespace, where we can issue better
7322 if (processing_specialization
)
7324 /* There are no restrictions on the placement of
7325 explicit instantiations. */
7326 if (processing_explicit_instantiation
)
7330 A member function definition that appears outside of the
7331 class definition shall appear in a namespace scope enclosing
7332 the class definition.
7336 The definition for a static data member shall appear in a
7337 namespace scope enclosing the member's class definition. */
7338 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7339 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7340 decl
, DECL_CONTEXT (decl
));
7343 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7344 METHOD_TYPE for a non-static member function; QUALS are the
7345 cv-qualifiers that apply to the function. */
7348 build_this_parm (tree type
, cp_cv_quals quals
)
7353 cp_cv_quals this_quals
;
7355 if (CLASS_TYPE_P (type
))
7358 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7359 this_type
= build_pointer_type (this_type
);
7362 this_type
= type_of_this_parm (type
);
7363 /* The `this' parameter is implicitly `const'; it cannot be
7365 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7366 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7367 parm
= build_artificial_parm (this_identifier
, qual_type
);
7368 cp_apply_type_quals_to_decl (this_quals
, parm
);
7372 /* DECL is a static member function. Complain if it was declared
7373 with function-cv-quals. */
7376 check_static_quals (tree decl
, cp_cv_quals quals
)
7378 if (quals
!= TYPE_UNQUALIFIED
)
7379 error ("static member function %q#D declared with type qualifiers",
7383 /* Helper function. Replace the temporary this parameter injected
7384 during cp_finish_omp_declare_simd with the real this parameter. */
7387 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7389 tree this_parm
= (tree
) data
;
7390 if (TREE_CODE (*tp
) == PARM_DECL
7391 && DECL_NAME (*tp
) == this_identifier
7392 && *tp
!= this_parm
)
7394 else if (TYPE_P (*tp
))
7399 /* CTYPE is class type, or null if non-class.
7400 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7402 DECLARATOR is the function's name.
7403 PARMS is a chain of PARM_DECLs for the function.
7404 VIRTUALP is truthvalue of whether the function is virtual or not.
7405 FLAGS are to be passed through to `grokclassfn'.
7406 QUALS are qualifiers indicating whether the function is `const'
7408 RAISES is a list of exceptions that this function can raise.
7409 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7410 not look, and -1 if we should not call `grokclassfn' at all.
7412 SFK is the kind of special function (if any) for the new function.
7414 Returns `NULL_TREE' if something goes wrong, after issuing
7415 applicable error messages. */
7418 grokfndecl (tree ctype
,
7422 tree orig_declarator
,
7424 enum overload_flags flags
,
7426 cp_ref_qualifier rqual
,
7432 special_function_kind sfk
,
7437 location_t location
)
7440 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7444 type
= build_ref_qualified_type (type
, rqual
);
7446 type
= build_exception_variant (type
, raises
);
7448 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7450 /* If we have an explicit location, use it, otherwise use whatever
7451 build_lang_decl used (probably input_location). */
7452 if (location
!= UNKNOWN_LOCATION
)
7453 DECL_SOURCE_LOCATION (decl
) = location
;
7455 if (TREE_CODE (type
) == METHOD_TYPE
)
7458 parm
= build_this_parm (type
, quals
);
7459 DECL_CHAIN (parm
) = parms
;
7462 DECL_ARGUMENTS (decl
) = parms
;
7463 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7464 DECL_CONTEXT (t
) = decl
;
7465 /* Propagate volatile out from type to decl. */
7466 if (TYPE_VOLATILE (type
))
7467 TREE_THIS_VOLATILE (decl
) = 1;
7469 /* Setup decl according to sfk. */
7472 case sfk_constructor
:
7473 case sfk_copy_constructor
:
7474 case sfk_move_constructor
:
7475 DECL_CONSTRUCTOR_P (decl
) = 1;
7477 case sfk_destructor
:
7478 DECL_DESTRUCTOR_P (decl
) = 1;
7484 /* If pointers to member functions use the least significant bit to
7485 indicate whether a function is virtual, ensure a pointer
7486 to this function will have that bit clear. */
7487 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7488 && TREE_CODE (type
) == METHOD_TYPE
7489 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7490 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7493 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7497 ("defining explicit specialization %qD in friend declaration",
7501 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7502 tree args
= TREE_OPERAND (orig_declarator
, 1);
7504 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7506 /* Something like `template <class T> friend void f<T>()'. */
7507 error ("invalid use of template-id %qD in declaration "
7508 "of primary template",
7514 /* A friend declaration of the form friend void f<>(). Record
7515 the information in the TEMPLATE_ID_EXPR. */
7516 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7518 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7519 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7521 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7522 if (TREE_PURPOSE (t
)
7523 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7525 error ("default arguments are not allowed in declaration "
7526 "of friend template specialization %qD",
7532 error ("%<inline%> is not allowed in declaration of friend "
7533 "template specialization %qD",
7536 error ("%<constexpr%> is not allowed in declaration of friend "
7537 "template specialization %qD",
7544 /* If this decl has namespace scope, set that up. */
7546 set_decl_namespace (decl
, in_namespace
, friendp
);
7548 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7550 /* `main' and builtins have implicit 'C' linkage. */
7551 if ((MAIN_NAME_P (declarator
)
7552 || (IDENTIFIER_LENGTH (declarator
) > 10
7553 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7554 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7555 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7556 || (targetcm
.cxx_implicit_extern_c
7557 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7558 && current_lang_name
== lang_name_cplusplus
7559 && ctype
== NULL_TREE
7560 && DECL_FILE_SCOPE_P (decl
))
7561 SET_DECL_LANGUAGE (decl
, lang_c
);
7563 /* Should probably propagate const out from type to decl I bet (mrs). */
7566 DECL_STATIC_FUNCTION_P (decl
) = 1;
7567 DECL_CONTEXT (decl
) = ctype
;
7572 DECL_CONTEXT (decl
) = ctype
;
7574 check_class_member_definition_namespace (decl
);
7577 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7579 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7580 error ("cannot declare %<::main%> to be a template");
7582 error ("cannot declare %<::main%> to be inline");
7584 error ("cannot declare %<::main%> to be constexpr");
7586 error ("cannot declare %<::main%> to be static");
7591 /* Members of anonymous types and local classes have no linkage; make
7592 them internal. If a typedef is made later, this will be changed. */
7593 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7594 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7597 if (publicp
&& cxx_dialect
== cxx98
)
7599 /* [basic.link]: A name with no linkage (notably, the name of a class
7600 or enumeration declared in a local scope) shall not be used to
7601 declare an entity with linkage.
7603 DR 757 relaxes this restriction for C++0x. */
7604 no_linkage_error (decl
);
7607 TREE_PUBLIC (decl
) = publicp
;
7610 DECL_INTERFACE_KNOWN (decl
) = 1;
7611 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7614 /* If the declaration was declared inline, mark it as such. */
7616 DECL_DECLARED_INLINE_P (decl
) = 1;
7618 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7620 DECL_EXTERNAL (decl
) = 1;
7621 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7626 ? G_("static member function %qD cannot have cv-qualifier")
7627 : G_("non-member function %qD cannot have cv-qualifier"),
7629 quals
= TYPE_UNQUALIFIED
;
7635 ? G_("static member function %qD cannot have ref-qualifier")
7636 : G_("non-member function %qD cannot have ref-qualifier"),
7638 rqual
= REF_QUAL_NONE
;
7642 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7643 && !grok_op_properties (decl
, /*complain=*/true))
7645 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7647 bool long_long_unsigned_p
;
7649 const char *suffix
= NULL
;
7650 /* [over.literal]/6: Literal operators shall not have C linkage. */
7651 if (DECL_LANGUAGE (decl
) == lang_c
)
7653 error ("literal operator with C linkage");
7657 if (DECL_NAMESPACE_SCOPE_P (decl
))
7659 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7662 error ("%qD has invalid argument list", decl
);
7666 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7667 if (long_long_unsigned_p
)
7669 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7670 warning (0, "integer suffix %<%s%>"
7671 " shadowed by implementation", suffix
);
7673 else if (long_double_p
)
7675 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7676 warning (0, "floating point suffix %<%s%>"
7677 " shadowed by implementation", suffix
);
7682 error ("%qD must be a non-member function", decl
);
7688 /* Make the init_value nonzero so pushdecl knows this is not
7689 tentative. error_mark_node is replaced later with the BLOCK. */
7690 DECL_INITIAL (decl
) = error_mark_node
;
7692 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7693 TREE_NOTHROW (decl
) = 1;
7695 if (flag_openmp
|| flag_cilkplus
)
7697 /* Adjust "omp declare simd" attributes. */
7698 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7702 for (attr
= ods
; attr
;
7703 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7705 if (TREE_CODE (type
) == METHOD_TYPE
)
7706 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7707 DECL_ARGUMENTS (decl
), NULL
);
7708 if (TREE_VALUE (attr
) != NULL_TREE
)
7710 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7711 cl
= c_omp_declare_simd_clauses_to_numbers
7712 (DECL_ARGUMENTS (decl
), cl
);
7714 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7716 TREE_VALUE (attr
) = NULL_TREE
;
7722 /* Caller will do the rest of this. */
7726 if (ctype
!= NULL_TREE
)
7727 grokclassfn (ctype
, decl
, flags
);
7730 if (cxx_dialect
>= cxx11
7731 && DECL_DESTRUCTOR_P (decl
)
7732 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7733 && !processing_template_decl
)
7734 deduce_noexcept_on_destructor (decl
);
7736 decl
= check_explicit_specialization (orig_declarator
, decl
,
7739 4 * (friendp
!= 0));
7740 if (decl
== error_mark_node
)
7743 if (DECL_STATIC_FUNCTION_P (decl
))
7744 check_static_quals (decl
, quals
);
7748 cplus_decl_attributes (&decl
, *attrlist
, 0);
7749 *attrlist
= NULL_TREE
;
7752 /* Check main's type after attributes have been applied. */
7753 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7755 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7758 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7760 error ("%<::main%> must return %<int%>");
7761 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7762 TREE_TYPE (decl
) = newtype
;
7765 check_main_parameter_types (decl
);
7768 if (ctype
!= NULL_TREE
7769 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7772 tree old_decl
= check_classfn (ctype
, decl
,
7773 (processing_template_decl
7774 > template_class_depth (ctype
))
7775 ? current_template_parms
7778 if (old_decl
== error_mark_node
)
7786 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7787 /* Because grokfndecl is always supposed to return a
7788 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7789 here. We depend on our callers to figure out that its
7790 really a template that's being returned. */
7791 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7793 if (DECL_STATIC_FUNCTION_P (old_decl
)
7794 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7796 /* Remove the `this' parm added by grokclassfn. */
7797 revert_static_member_fn (decl
);
7798 check_static_quals (decl
, quals
);
7800 if (DECL_ARTIFICIAL (old_decl
))
7802 error ("definition of implicitly-declared %qD", old_decl
);
7805 else if (DECL_DEFAULTED_FN (old_decl
))
7807 error ("definition of explicitly-defaulted %q+D", decl
);
7808 error ("%q+#D explicitly defaulted here", old_decl
);
7812 /* Since we've smashed OLD_DECL to its
7813 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7814 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7815 decl
= DECL_TEMPLATE_RESULT (decl
);
7817 /* Attempt to merge the declarations. This can fail, in
7818 the case of some invalid specialization declarations. */
7819 pushed_scope
= push_scope (ctype
);
7820 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7822 pop_scope (pushed_scope
);
7825 error ("no %q#D member function declared in class %qT",
7833 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7836 if (ctype
== NULL_TREE
|| check
)
7840 DECL_VIRTUAL_P (decl
) = 1;
7845 /* decl is a FUNCTION_DECL.
7846 specifiers are the parsed virt-specifiers.
7848 Set flags to reflect the virt-specifiers.
7853 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7855 if (decl
== NULL_TREE
)
7857 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7858 DECL_OVERRIDE_P (decl
) = 1;
7859 if (specifiers
& VIRT_SPEC_FINAL
)
7860 DECL_FINAL_P (decl
) = 1;
7864 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7865 the linkage that DECL will receive in the object file. */
7868 set_linkage_for_static_data_member (tree decl
)
7870 /* A static data member always has static storage duration and
7871 external linkage. Note that static data members are forbidden in
7872 local classes -- the only situation in which a class has
7873 non-external linkage. */
7874 TREE_PUBLIC (decl
) = 1;
7875 TREE_STATIC (decl
) = 1;
7876 /* For non-template classes, static data members are always put
7877 out in exactly those files where they are defined, just as
7878 with ordinary namespace-scope variables. */
7879 if (!processing_template_decl
)
7880 DECL_INTERFACE_KNOWN (decl
) = 1;
7883 /* Create a VAR_DECL named NAME with the indicated TYPE.
7885 If SCOPE is non-NULL, it is the class type or namespace containing
7886 the variable. If SCOPE is NULL, the variable should is created in
7887 the innermost enclosing scope. */
7890 grokvardecl (tree type
,
7892 const cp_decl_specifier_seq
*declspecs
,
7898 tree explicit_scope
;
7900 gcc_assert (!name
|| identifier_p (name
));
7902 /* Compute the scope in which to place the variable, but remember
7903 whether or not that scope was explicitly specified by the user. */
7904 explicit_scope
= scope
;
7907 /* An explicit "extern" specifier indicates a namespace-scope
7909 if (declspecs
->storage_class
== sc_extern
)
7910 scope
= current_decl_namespace ();
7911 else if (!at_function_scope_p ())
7912 scope
= current_scope ();
7916 && (/* If the variable is a namespace-scope variable declared in a
7917 template, we need DECL_LANG_SPECIFIC. */
7918 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7919 /* Similarly for namespace-scope variables with language linkage
7921 || (TREE_CODE (scope
) == NAMESPACE_DECL
7922 && current_lang_name
!= lang_name_cplusplus
)
7923 /* Similarly for static data members. */
7925 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7927 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7929 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7930 set_decl_namespace (decl
, explicit_scope
, 0);
7932 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7934 if (declspecs
->storage_class
== sc_extern
)
7936 DECL_THIS_EXTERN (decl
) = 1;
7937 DECL_EXTERNAL (decl
) = !initialized
;
7940 if (DECL_CLASS_SCOPE_P (decl
))
7942 set_linkage_for_static_data_member (decl
);
7943 /* This function is only called with out-of-class definitions. */
7944 DECL_EXTERNAL (decl
) = 0;
7945 check_class_member_definition_namespace (decl
);
7947 /* At top level, either `static' or no s.c. makes a definition
7948 (perhaps tentative), and absence of `static' makes it public. */
7949 else if (toplevel_bindings_p ())
7951 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7952 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7953 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7955 /* Not at top level, only `static' makes a static definition. */
7958 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7959 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7962 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
7964 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7965 if (declspecs
->gnu_thread_keyword_p
)
7966 DECL_GNU_TLS_P (decl
) = true;
7969 /* If the type of the decl has no linkage, make sure that we'll
7970 notice that in mark_used. */
7971 if (cxx_dialect
> cxx98
7972 && decl_linkage (decl
) != lk_none
7973 && DECL_LANG_SPECIFIC (decl
) == NULL
7974 && !DECL_EXTERN_C_P (decl
)
7975 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7976 retrofit_lang_decl (decl
);
7978 if (TREE_PUBLIC (decl
))
7980 /* [basic.link]: A name with no linkage (notably, the name of a class
7981 or enumeration declared in a local scope) shall not be used to
7982 declare an entity with linkage.
7984 DR 757 relaxes this restriction for C++0x. */
7985 if (cxx_dialect
< cxx11
)
7986 no_linkage_error (decl
);
7989 DECL_INTERFACE_KNOWN (decl
) = 1;
7994 /* Create and return a canonical pointer to member function type, for
7995 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7998 build_ptrmemfunc_type (tree type
)
8002 tree unqualified_variant
= NULL_TREE
;
8004 if (type
== error_mark_node
)
8007 /* If a canonical type already exists for this type, use it. We use
8008 this method instead of type_hash_canon, because it only does a
8009 simple equality check on the list of field members. */
8011 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8014 /* Make sure that we always have the unqualified pointer-to-member
8016 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8018 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8020 t
= make_class_type (RECORD_TYPE
);
8021 xref_basetypes (t
, NULL_TREE
);
8023 /* Let the front end know this is a pointer to member function... */
8024 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8025 /* ... and not really a class type. */
8026 SET_CLASS_TYPE_P (t
, 0);
8028 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8031 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8033 DECL_CHAIN (field
) = fields
;
8036 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8038 /* Zap out the name so that the back end will give us the debugging
8039 information for this anonymous RECORD_TYPE. */
8040 TYPE_NAME (t
) = NULL_TREE
;
8042 /* If this is not the unqualified form of this pointer-to-member
8043 type, set the TYPE_MAIN_VARIANT for this type to be the
8044 unqualified type. Since they are actually RECORD_TYPEs that are
8045 not variants of each other, we must do this manually.
8046 As we just built a new type there is no need to do yet another copy. */
8047 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8049 int type_quals
= cp_type_quals (type
);
8050 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
8051 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
8052 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
8053 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
8054 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
8055 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
8056 TREE_TYPE (TYPE_BINFO (t
)) = t
;
8059 /* Cache this pointer-to-member type so that we can find it again
8061 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8063 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8064 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8065 else if (TYPE_CANONICAL (type
) != type
)
8066 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8071 /* Create and return a pointer to data member type. */
8074 build_ptrmem_type (tree class_type
, tree member_type
)
8076 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8078 cp_cv_quals quals
= type_memfn_quals (member_type
);
8079 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8080 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8081 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8085 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8086 return build_offset_type (class_type
, member_type
);
8090 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8091 Check to see that the definition is valid. Issue appropriate error
8092 messages. Return 1 if the definition is particularly bad, or 0
8096 check_static_variable_definition (tree decl
, tree type
)
8098 /* Can't check yet if we don't know the type. */
8099 if (dependent_type_p (type
))
8101 /* If DECL is declared constexpr, we'll do the appropriate checks
8102 in check_initializer. */
8103 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8105 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8107 if (!COMPLETE_TYPE_P (type
))
8108 error ("in-class initialization of static data member %q#D of "
8109 "incomplete type", decl
);
8110 else if (literal_type_p (type
))
8111 permerror (input_location
,
8112 "%<constexpr%> needed for in-class initialization of "
8113 "static data member %q#D of non-integral type", decl
);
8115 error ("in-class initialization of static data member %q#D of "
8116 "non-literal type", decl
);
8120 /* Motion 10 at San Diego: If a static const integral data member is
8121 initialized with an integral constant expression, the initializer
8122 may appear either in the declaration (within the class), or in
8123 the definition, but not both. If it appears in the class, the
8124 member is a member constant. The file-scope definition is always
8126 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8128 error ("invalid in-class initialization of static data member "
8129 "of non-integral type %qT",
8133 else if (!CP_TYPE_CONST_P (type
))
8134 error ("ISO C++ forbids in-class initialization of non-const "
8135 "static member %qD",
8137 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8138 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8139 "%qD of non-integral type %qT", decl
, type
);
8144 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8145 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8146 expressions out into temporary variables so that walk_tree doesn't
8147 step into them (c++/15764). */
8150 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8152 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8153 tree expr
= *expr_p
;
8154 if (TREE_CODE (expr
) == SAVE_EXPR
)
8156 tree op
= TREE_OPERAND (expr
, 0);
8157 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8158 if (TREE_SIDE_EFFECTS (op
))
8159 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8162 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8167 /* Entry point for the above. */
8170 stabilize_vla_size (tree size
)
8172 struct pointer_set_t
*pset
= pointer_set_create ();
8173 /* Break out any function calls into temporary variables. */
8174 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8175 pointer_set_destroy (pset
);
8178 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8179 not inside of SAVE_EXPR and fold them. */
8182 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8184 tree expr
= *expr_p
;
8185 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8187 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8189 *(bool *)data
= true;
8190 if (SIZEOF_EXPR_TYPE_P (expr
))
8191 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8192 SIZEOF_EXPR
, false);
8193 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8194 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8197 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8199 if (expr
== error_mark_node
)
8200 expr
= size_one_node
;
8207 /* Given the SIZE (i.e., number of elements) in an array, compute an
8208 appropriate index type for the array. If non-NULL, NAME is the
8209 name of the thing being declared. */
8212 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8216 tree abi_1_itype
= NULL_TREE
;
8218 if (error_operand_p (size
))
8219 return error_mark_node
;
8221 if (!type_dependent_expression_p (size
))
8223 tree type
= TREE_TYPE (size
);
8225 mark_rvalue_use (size
);
8227 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8228 && TREE_SIDE_EFFECTS (size
))
8229 /* In C++98, we mark a non-constant array bound with a magic
8230 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8233 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8235 if (CLASS_TYPE_P (type
)
8236 && CLASSTYPE_LITERAL_P (type
))
8238 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8241 if (!(complain
& tf_error
))
8242 return error_mark_node
;
8244 error ("size of array %qD has non-integral type %qT",
8247 error ("size of array has non-integral type %qT", type
);
8248 size
= integer_one_node
;
8250 if (size
== error_mark_node
)
8251 return error_mark_node
;
8252 type
= TREE_TYPE (size
);
8253 /* We didn't support this case in GCC 3.2, so don't bother
8254 trying to model it now in ABI v1. */
8255 abi_1_itype
= error_mark_node
;
8258 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8259 size
= maybe_constant_value (size
);
8261 if (!TREE_CONSTANT (size
))
8265 if (error_operand_p (size
))
8266 return error_mark_node
;
8268 /* The array bound must be an integer type. */
8269 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8271 if (!(complain
& tf_error
))
8272 return error_mark_node
;
8274 error ("size of array %qD has non-integral type %qT", name
, type
);
8276 error ("size of array has non-integral type %qT", type
);
8277 size
= integer_one_node
;
8278 type
= TREE_TYPE (size
);
8282 /* A type is dependent if it is...an array type constructed from any
8283 dependent type or whose size is specified by a constant expression
8284 that is value-dependent. */
8285 /* We can only call value_dependent_expression_p on integral constant
8286 expressions; treat non-constant expressions as dependent, too. */
8287 if (processing_template_decl
8288 && (type_dependent_expression_p (size
)
8289 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8291 /* We cannot do any checking for a SIZE that isn't known to be
8292 constant. Just build the index type and mark that it requires
8293 structural equality checks. */
8294 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8295 size
, size_one_node
));
8296 TYPE_DEPENDENT_P (itype
) = 1;
8297 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8298 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8302 if (!abi_version_at_least (2) && processing_template_decl
8303 && abi_1_itype
== NULL_TREE
)
8304 /* For abi-1, we handled all instances in templates the same way,
8305 even when they were non-dependent. This affects the manglings
8306 produced. So, we do the normal checking for non-dependent
8307 sizes, but at the end we'll return the same type that abi-1
8308 would have, but with TYPE_CANONICAL set to the "right"
8309 value that the current ABI would provide. */
8310 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8311 osize
, integer_one_node
));
8313 /* Normally, the array-bound will be a constant. */
8314 if (TREE_CODE (size
) == INTEGER_CST
)
8316 /* Check to see if the array bound overflowed. Make that an
8317 error, no matter how generous we're being. */
8318 constant_expression_error (size
);
8320 /* An array must have a positive number of elements. */
8321 if (INT_CST_LT (size
, integer_zero_node
))
8323 if (!(complain
& tf_error
))
8324 return error_mark_node
;
8326 error ("size of array %qD is negative", name
);
8328 error ("size of array is negative");
8329 size
= integer_one_node
;
8331 /* As an extension we allow zero-sized arrays. */
8332 else if (integer_zerop (size
))
8334 if (!(complain
& tf_error
))
8335 /* We must fail if performing argument deduction (as
8336 indicated by the state of complain), so that
8337 another substitution can be found. */
8338 return error_mark_node
;
8339 else if (in_system_header_at (input_location
))
8340 /* Allow them in system headers because glibc uses them. */;
8342 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8344 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8347 else if (TREE_CONSTANT (size
)
8348 /* We don't allow VLAs at non-function scopes, or during
8349 tentative template substitution. */
8350 || !at_function_scope_p ()
8351 || (cxx_dialect
< cxx1y
&& !(complain
& tf_error
)))
8353 if (!(complain
& tf_error
))
8354 return error_mark_node
;
8355 /* `(int) &fn' is not a valid array bound. */
8357 error ("size of array %qD is not an integral constant-expression",
8360 error ("size of array is not an integral constant-expression");
8361 size
= integer_one_node
;
8363 else if (cxx_dialect
< cxx1y
&& pedantic
&& warn_vla
!= 0)
8366 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8368 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8370 else if (warn_vla
> 0)
8374 "variable length array %qD is used", name
);
8377 "variable length array is used");
8380 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8381 /* A variable sized array. */
8382 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8385 HOST_WIDE_INT saved_processing_template_decl
;
8387 /* Compute the index of the largest element in the array. It is
8388 one less than the number of elements in the array. We save
8389 and restore PROCESSING_TEMPLATE_DECL so that computations in
8390 cp_build_binary_op will be appropriately folded. */
8391 saved_processing_template_decl
= processing_template_decl
;
8392 processing_template_decl
= 0;
8393 itype
= cp_build_binary_op (input_location
,
8395 cp_convert (ssizetype
, size
, complain
),
8396 cp_convert (ssizetype
, integer_one_node
,
8399 itype
= fold (itype
);
8400 processing_template_decl
= saved_processing_template_decl
;
8402 if (!TREE_CONSTANT (itype
))
8404 /* A variable sized array. */
8405 itype
= variable_size (itype
);
8407 if (TREE_CODE (itype
) != SAVE_EXPR
)
8409 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8410 they might survive till gimplification. */
8411 tree newitype
= itype
;
8413 cp_walk_tree_without_duplicates (&newitype
,
8414 fold_sizeof_expr_r
, &found
);
8416 itype
= variable_size (fold (newitype
));
8419 stabilize_vla_size (itype
);
8421 if (cxx_dialect
>= cxx1y
&& flag_exceptions
)
8423 /* If the VLA bound is larger than half the address space,
8424 or less than zero, throw std::bad_array_length. */
8425 tree comp
= build2 (LT_EXPR
, boolean_type_node
, itype
,
8427 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
8428 throw_bad_array_length (), void_zero_node
);
8429 finish_expr_stmt (comp
);
8431 else if (flag_sanitize
& SANITIZE_VLA
)
8433 /* From C++1y onwards, we throw an exception on a negative
8434 length size of an array; see above. */
8436 /* We have to add 1 -- in the ubsan routine we generate
8437 LE_EXPR rather than LT_EXPR. */
8438 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8439 build_one_cst (TREE_TYPE (itype
)));
8440 t
= ubsan_instrument_vla (input_location
, t
);
8441 finish_expr_stmt (t
);
8444 /* Make sure that there was no overflow when creating to a signed
8445 index type. (For example, on a 32-bit machine, an array with
8446 size 2^32 - 1 is too big.) */
8447 else if (TREE_CODE (itype
) == INTEGER_CST
8448 && TREE_OVERFLOW (itype
))
8450 if (!(complain
& tf_error
))
8451 return error_mark_node
;
8452 error ("overflow in array dimension");
8453 TREE_OVERFLOW (itype
) = 0;
8457 /* Create and return the appropriate index type. */
8458 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8460 tree t
= build_index_type (itype
);
8461 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8462 itype
= abi_1_itype
;
8465 itype
= build_index_type (itype
);
8467 /* If the index type were dependent, we would have returned early, so
8468 remember that it isn't. */
8469 TYPE_DEPENDENT_P (itype
) = 0;
8470 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8474 /* Returns the scope (if any) in which the entity declared by
8475 DECLARATOR will be located. If the entity was declared with an
8476 unqualified name, NULL_TREE is returned. */
8479 get_scope_of_declarator (const cp_declarator
*declarator
)
8481 while (declarator
&& declarator
->kind
!= cdk_id
)
8482 declarator
= declarator
->declarator
;
8484 /* If the declarator-id is a SCOPE_REF, the scope in which the
8485 declaration occurs is the first operand. */
8487 && declarator
->u
.id
.qualifying_scope
)
8488 return declarator
->u
.id
.qualifying_scope
;
8490 /* Otherwise, the declarator is not a qualified name; the entity will
8491 be declared in the current scope. */
8495 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8496 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8500 create_array_type_for_decl (tree name
, tree type
, tree size
)
8502 tree itype
= NULL_TREE
;
8504 /* If things have already gone awry, bail now. */
8505 if (type
== error_mark_node
|| size
== error_mark_node
)
8506 return error_mark_node
;
8508 /* 8.3.4/1: If the type of the identifier of D contains the auto
8509 type-specifier, the program is ill-formed. */
8510 if (pedantic
&& type_uses_auto (type
))
8511 pedwarn (input_location
, OPT_Wpedantic
,
8512 "declaration of %qD as array of %<auto%>", name
);
8514 /* If there are some types which cannot be array elements,
8515 issue an error-message and return. */
8516 switch (TREE_CODE (type
))
8520 error ("declaration of %qD as array of void", name
);
8522 error ("creating array of void");
8523 return error_mark_node
;
8527 error ("declaration of %qD as array of functions", name
);
8529 error ("creating array of functions");
8530 return error_mark_node
;
8532 case REFERENCE_TYPE
:
8534 error ("declaration of %qD as array of references", name
);
8536 error ("creating array of references");
8537 return error_mark_node
;
8541 error ("declaration of %qD as array of function members", name
);
8543 error ("creating array of function members");
8544 return error_mark_node
;
8552 The constant expressions that specify the bounds of the arrays
8553 can be omitted only for the first member of the sequence. */
8554 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8557 error ("declaration of %qD as multidimensional array must "
8558 "have bounds for all dimensions except the first",
8561 error ("multidimensional array must have bounds for all "
8562 "dimensions except the first");
8564 return error_mark_node
;
8567 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
)
8568 && (flag_iso
|| warn_vla
> 0))
8569 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8571 /* 8.3.4p1: ...if the type of the identifier of D contains the auto
8572 type-specifier, the program is ill-formed. */
8573 if (type_uses_auto (type
))
8575 error ("%qD declared as array of %qT", name
, type
);
8576 return error_mark_node
;
8579 /* Figure out the index type for the array. */
8581 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8584 T is called the array element type; this type shall not be [...] an
8585 abstract class type. */
8586 abstract_virtuals_error (name
, type
);
8588 return build_cplus_array_type (type
, itype
);
8591 /* Check that it's OK to declare a function with the indicated TYPE.
8592 SFK indicates the kind of special function (if any) that this
8593 function is. OPTYPE is the type given in a conversion operator
8594 declaration, or the class type for a constructor/destructor.
8595 Returns the actual return type of the function; that
8596 may be different than TYPE if an error occurs, or for certain
8597 special functions. */
8600 check_special_function_return_type (special_function_kind sfk
,
8606 case sfk_constructor
:
8608 error ("return type specification for constructor invalid");
8610 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8611 type
= build_pointer_type (optype
);
8613 type
= void_type_node
;
8616 case sfk_destructor
:
8618 error ("return type specification for destructor invalid");
8619 /* We can't use the proper return type here because we run into
8620 problems with ambiguous bases and covariant returns.
8621 Java classes are left unchanged because (void *) isn't a valid
8622 Java type, and we don't want to change the Java ABI. */
8623 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8624 type
= build_pointer_type (void_type_node
);
8626 type
= void_type_node
;
8629 case sfk_conversion
:
8631 error ("return type specified for %<operator %T%>", optype
);
8642 /* A variable or data member (whose unqualified name is IDENTIFIER)
8643 has been declared with the indicated TYPE. If the TYPE is not
8644 acceptable, issue an error message and return a type to use for
8645 error-recovery purposes. */
8648 check_var_type (tree identifier
, tree type
)
8650 if (VOID_TYPE_P (type
))
8653 error ("unnamed variable or field declared void");
8654 else if (identifier_p (identifier
))
8656 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8657 error ("variable or field %qE declared void", identifier
);
8660 error ("variable or field declared void");
8661 type
= error_mark_node
;
8667 /* Given declspecs and a declarator (abstract or otherwise), determine
8668 the name and type of the object declared and construct a DECL node
8671 DECLSPECS points to the representation of declaration-specifier
8672 sequence that precedes declarator.
8674 DECL_CONTEXT says which syntactic context this declaration is in:
8675 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8676 FUNCDEF for a function definition. Like NORMAL but a few different
8677 error messages in each case. Return value may be zero meaning
8678 this definition is too screwy to try to parse.
8679 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8680 handle member functions (which have FIELD context).
8681 Return value may be zero meaning this definition is too screwy to
8683 PARM for a parameter declaration (either within a function prototype
8684 or before a function body). Make a PARM_DECL, or return void_type_node.
8685 TPARM for a template parameter declaration.
8686 CATCHPARM for a parameter declaration before a catch clause.
8687 TYPENAME if for a typename (in a cast or sizeof).
8688 Don't make a DECL node; just return the ..._TYPE node.
8689 FIELD for a struct or union field; make a FIELD_DECL.
8690 BITFIELD for a field with specified width.
8692 INITIALIZED is as for start_decl.
8694 ATTRLIST is a pointer to the list of attributes, which may be NULL
8695 if there are none; *ATTRLIST may be modified if attributes from inside
8696 the declarator should be applied to the declaration.
8698 When this function is called, scoping variables (such as
8699 CURRENT_CLASS_TYPE) should reflect the scope in which the
8700 declaration occurs, not the scope in which the new declaration will
8701 be placed. For example, on:
8705 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8708 Returns a DECL (if a declarator is present), a TYPE (if there is no
8709 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8713 grokdeclarator (const cp_declarator
*declarator
,
8714 cp_decl_specifier_seq
*declspecs
,
8715 enum decl_context decl_context
,
8719 tree type
= NULL_TREE
;
8721 int explicit_int128
= 0;
8722 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8723 int explicit_int
= 0;
8724 int explicit_char
= 0;
8725 int defaulted_int
= 0;
8727 tree typedef_decl
= NULL_TREE
;
8728 const char *name
= NULL
;
8729 tree typedef_type
= NULL_TREE
;
8730 /* True if this declarator is a function definition. */
8731 bool funcdef_flag
= false;
8732 cp_declarator_kind innermost_code
= cdk_error
;
8735 /* See the code below that used this. */
8736 tree decl_attr
= NULL_TREE
;
8739 /* Keep track of what sort of function is being processed
8740 so that we can warn about default return values, or explicit
8741 return values which do not match prescribed defaults. */
8742 special_function_kind sfk
= sfk_none
;
8744 tree dname
= NULL_TREE
;
8745 tree ctor_return_type
= NULL_TREE
;
8746 enum overload_flags flags
= NO_SPECIAL
;
8747 /* cv-qualifiers that apply to the declarator, for a declaration of
8748 a member function. */
8749 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8750 /* virt-specifiers that apply to the declarator, for a declaration of
8751 a member function. */
8752 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8753 /* ref-qualifier that applies to the declarator, for a declaration of
8754 a member function. */
8755 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8756 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8758 tree raises
= NULL_TREE
;
8759 int template_count
= 0;
8760 tree returned_attrs
= NULL_TREE
;
8761 tree parms
= NULL_TREE
;
8762 const cp_declarator
*id_declarator
;
8763 /* The unqualified name of the declarator; either an
8764 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8765 tree unqualified_id
;
8766 /* The class type, if any, in which this entity is located,
8767 or NULL_TREE if none. Note that this value may be different from
8768 the current class type; for example if an attempt is made to declare
8769 "A::f" inside "B", this value will be "A". */
8770 tree ctype
= current_class_type
;
8771 /* The NAMESPACE_DECL for the namespace in which this entity is
8772 located. If an unqualified name is used to declare the entity,
8773 this value will be NULL_TREE, even if the entity is located at
8775 tree in_namespace
= NULL_TREE
;
8776 cp_storage_class storage_class
;
8777 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8778 bool type_was_error_mark_node
= false;
8779 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8780 bool template_type_arg
= false;
8781 bool template_parm_flag
= false;
8782 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8783 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8784 source_location saved_loc
= input_location
;
8787 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8788 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8789 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8790 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8791 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8792 explicit_int128
= declspecs
->explicit_int128_p
;
8793 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8795 if (decl_context
== FUNCDEF
)
8796 funcdef_flag
= true, decl_context
= NORMAL
;
8797 else if (decl_context
== MEMFUNCDEF
)
8798 funcdef_flag
= true, decl_context
= FIELD
;
8799 else if (decl_context
== BITFIELD
)
8800 bitfield
= 1, decl_context
= FIELD
;
8801 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8802 template_type_arg
= true, decl_context
= TYPENAME
;
8803 else if (decl_context
== TPARM
)
8804 template_parm_flag
= true, decl_context
= PARM
;
8806 if (initialized
> 1)
8807 funcdef_flag
= true;
8809 /* Look inside a declarator for the name being declared
8810 and get it as a string, for an error message. */
8811 for (id_declarator
= declarator
;
8813 id_declarator
= id_declarator
->declarator
)
8815 if (id_declarator
->kind
!= cdk_id
)
8816 innermost_code
= id_declarator
->kind
;
8818 switch (id_declarator
->kind
)
8821 if (id_declarator
->declarator
8822 && id_declarator
->declarator
->kind
== cdk_id
)
8824 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8825 if (sfk
== sfk_destructor
)
8832 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8833 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8836 if (qualifying_scope
)
8838 if (at_function_scope_p ())
8842 A declarator-id shall not be qualified except
8845 None of the cases are permitted in block
8847 if (qualifying_scope
== global_namespace
)
8848 error ("invalid use of qualified-name %<::%D%>",
8850 else if (TYPE_P (qualifying_scope
))
8851 error ("invalid use of qualified-name %<%T::%D%>",
8852 qualifying_scope
, decl
);
8854 error ("invalid use of qualified-name %<%D::%D%>",
8855 qualifying_scope
, decl
);
8856 return error_mark_node
;
8858 else if (TYPE_P (qualifying_scope
))
8860 ctype
= qualifying_scope
;
8861 if (!MAYBE_CLASS_TYPE_P (ctype
))
8863 error ("%q#T is not a class or a namespace", ctype
);
8866 else if (innermost_code
!= cdk_function
8867 && current_class_type
8868 && !uniquely_derived_from_p (ctype
,
8869 current_class_type
))
8871 error ("invalid use of qualified-name %<%T::%D%>",
8872 qualifying_scope
, decl
);
8873 return error_mark_node
;
8876 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8877 in_namespace
= qualifying_scope
;
8879 switch (TREE_CODE (decl
))
8885 if (innermost_code
!= cdk_function
)
8887 error ("declaration of %qD as non-function", decl
);
8888 return error_mark_node
;
8890 else if (!qualifying_scope
8891 && !(current_class_type
&& at_class_scope_p ()))
8893 error ("declaration of %qD as non-member", decl
);
8894 return error_mark_node
;
8897 type
= TREE_OPERAND (decl
, 0);
8899 type
= constructor_name (type
);
8900 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8905 case TEMPLATE_ID_EXPR
:
8907 tree fns
= TREE_OPERAND (decl
, 0);
8910 if (!identifier_p (dname
))
8912 gcc_assert (is_overloaded_fn (dname
));
8913 dname
= DECL_NAME (get_first_fn (dname
));
8918 case IDENTIFIER_NODE
:
8919 if (identifier_p (decl
))
8922 if (C_IS_RESERVED_WORD (dname
))
8924 error ("declarator-id missing; using reserved word %qD",
8926 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8928 else if (!IDENTIFIER_TYPENAME_P (dname
))
8929 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8932 gcc_assert (flags
== NO_SPECIAL
);
8933 flags
= TYPENAME_FLAG
;
8934 ctor_return_type
= TREE_TYPE (dname
);
8935 sfk
= sfk_conversion
;
8936 if (is_typename_at_global_scope (dname
))
8937 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8939 name
= "<invalid operator>";
8956 return error_mark_node
;
8961 if (id_declarator
->kind
== cdk_id
)
8967 The declarator in a function-definition shall have the form
8968 D1 ( parameter-declaration-clause) ... */
8969 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8971 error ("function definition does not declare parameters");
8972 return error_mark_node
;
8975 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8976 && innermost_code
!= cdk_function
8977 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8979 error ("declaration of %qD as non-function", dname
);
8980 return error_mark_node
;
8984 && identifier_p (dname
)
8985 && UDLIT_OPER_P (dname
)
8986 && innermost_code
!= cdk_function
)
8988 error ("declaration of %qD as non-function", dname
);
8989 return error_mark_node
;
8992 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8996 error ("declaration of %qD as %<typedef%>", dname
);
8997 return error_mark_node
;
8999 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9001 error ("declaration of %qD as parameter", dname
);
9002 return error_mark_node
;
9006 /* Anything declared one level down from the top level
9007 must be one of the parameters of a function
9008 (because the body is at least two levels down). */
9010 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9011 by not allowing C++ class definitions to specify their parameters
9012 with xdecls (must be spec.d in the parmlist).
9014 Since we now wait to push a class scope until we are sure that
9015 we are in a legitimate method context, we must set oldcname
9016 explicitly (since current_class_name is not yet alive).
9018 We also want to avoid calling this a PARM if it is in a namespace. */
9020 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9022 cp_binding_level
*b
= current_binding_level
;
9023 current_binding_level
= b
->level_chain
;
9024 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9025 decl_context
= PARM
;
9026 current_binding_level
= b
;
9030 name
= decl_context
== PARM
? "parameter" : "type name";
9032 if (constexpr_p
&& typedef_p
)
9034 error ("%<constexpr%> cannot appear in a typedef declaration");
9035 return error_mark_node
;
9038 /* If there were multiple types specified in the decl-specifier-seq,
9039 issue an error message. */
9040 if (declspecs
->multiple_types_p
)
9042 error ("two or more data types in declaration of %qs", name
);
9043 return error_mark_node
;
9046 if (declspecs
->conflicting_specifiers_p
)
9048 error ("conflicting specifiers in declaration of %qs", name
);
9049 return error_mark_node
;
9052 /* Extract the basic type from the decl-specifier-seq. */
9053 type
= declspecs
->type
;
9054 if (type
== error_mark_node
)
9057 type_was_error_mark_node
= true;
9059 /* If the entire declaration is itself tagged as deprecated then
9060 suppress reports of deprecated items. */
9061 if (type
&& TREE_DEPRECATED (type
)
9062 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9063 warn_deprecated_use (type
, NULL_TREE
);
9064 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9066 typedef_decl
= type
;
9067 type
= TREE_TYPE (typedef_decl
);
9068 if (TREE_DEPRECATED (type
)
9069 && DECL_ARTIFICIAL (typedef_decl
)
9070 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9071 warn_deprecated_use (type
, NULL_TREE
);
9073 /* No type at all: default to `int', and set DEFAULTED_INT
9074 because it was not a user-defined typedef. */
9075 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
9077 /* These imply 'int'. */
9078 type
= integer_type_node
;
9082 explicit_int
= declspecs
->explicit_int_p
;
9083 explicit_char
= declspecs
->explicit_char_p
;
9086 /* See the code below that used this. */
9088 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9090 typedef_type
= type
;
9093 if (sfk
!= sfk_conversion
)
9094 ctor_return_type
= ctype
;
9096 if (sfk
!= sfk_none
)
9097 type
= check_special_function_return_type (sfk
, type
,
9099 else if (type
== NULL_TREE
)
9105 /* We handle `main' specially here, because 'main () { }' is so
9106 common. With no options, it is allowed. With -Wreturn-type,
9107 it is a warning. It is only an error with -pedantic-errors. */
9108 is_main
= (funcdef_flag
9109 && dname
&& identifier_p (dname
)
9110 && MAIN_NAME_P (dname
)
9111 && ctype
== NULL_TREE
9112 && in_namespace
== NULL_TREE
9113 && current_namespace
== global_namespace
);
9115 if (type_was_error_mark_node
)
9116 /* We've already issued an error, don't complain more. */;
9117 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9118 /* Allow it, sigh. */;
9120 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9122 pedwarn (input_location
, OPT_Wpedantic
,
9123 "ISO C++ forbids declaration of %qs with no type", name
);
9125 warning (OPT_Wreturn_type
,
9126 "ISO C++ forbids declaration of %qs with no type", name
);
9128 type
= integer_type_node
;
9133 if (explicit_int128
)
9135 if (int128_integer_type_node
== NULL_TREE
)
9137 error ("%<__int128%> is not supported by this target");
9138 explicit_int128
= false;
9140 else if (pedantic
&& ! in_system_header_at (input_location
))
9141 pedwarn (input_location
, OPT_Wpedantic
,
9142 "ISO C++ does not support %<__int128%> for %qs", name
);
9145 /* Now process the modifiers that were specified
9146 and check for invalid combinations. */
9148 /* Long double is a special combination. */
9149 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9152 type
= cp_build_qualified_type (long_double_type_node
,
9153 cp_type_quals (type
));
9156 /* Check all other uses of type modifiers. */
9158 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9162 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9163 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9164 else if (signed_p
&& unsigned_p
)
9165 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9166 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9167 error ("%<long long%> invalid for %qs", name
);
9168 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9169 error ("%<long%> invalid for %qs", name
);
9170 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9171 error ("%<short%> invalid for %qs", name
);
9172 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9173 error ("%<long%> or %<short%> invalid for %qs", name
);
9174 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9175 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9176 else if ((long_p
|| short_p
) && explicit_char
)
9177 error ("%<long%> or %<short%> specified with char for %qs", name
);
9178 else if (long_p
&& short_p
)
9179 error ("%<long%> and %<short%> specified together for %qs", name
);
9180 else if (type
== char16_type_node
|| type
== char32_type_node
)
9182 if (signed_p
|| unsigned_p
)
9183 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9184 else if (short_p
|| long_p
)
9185 error ("%<short%> or %<long%> invalid for %qs", name
);
9190 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9192 pedwarn (input_location
, OPT_Wpedantic
,
9193 "long, short, signed or unsigned used invalidly for %qs",
9195 if (flag_pedantic_errors
)
9200 /* Discard the type modifiers if they are invalid. */
9211 /* Decide whether an integer type is signed or not.
9212 Optionally treat bitfields as signed by default. */
9216 It is implementation-defined whether a plain (neither
9217 explicitly signed or unsigned) char, short, int, or long
9218 bit-field is signed or unsigned.
9220 Naturally, we extend this to long long as well. Note that
9221 this does not include wchar_t. */
9222 || (bitfield
&& !flag_signed_bitfields
9224 /* A typedef for plain `int' without `signed' can be
9225 controlled just like plain `int', but a typedef for
9226 `signed int' cannot be so controlled. */
9228 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9229 && TREE_CODE (type
) == INTEGER_TYPE
9230 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9232 if (explicit_int128
)
9233 type
= int128_unsigned_type_node
;
9235 type
= long_long_unsigned_type_node
;
9237 type
= long_unsigned_type_node
;
9239 type
= short_unsigned_type_node
;
9240 else if (type
== char_type_node
)
9241 type
= unsigned_char_type_node
;
9242 else if (typedef_decl
)
9243 type
= unsigned_type_for (type
);
9245 type
= unsigned_type_node
;
9247 else if (signed_p
&& type
== char_type_node
)
9248 type
= signed_char_type_node
;
9249 else if (explicit_int128
)
9250 type
= int128_integer_type_node
;
9252 type
= long_long_integer_type_node
;
9254 type
= long_integer_type_node
;
9256 type
= short_integer_type_node
;
9258 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9260 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9261 error ("complex invalid for %qs", name
);
9262 /* If we just have "complex", it is equivalent to
9263 "complex double", but if any modifiers at all are specified it is
9264 the complex form of TYPE. E.g, "complex short" is
9265 "complex short int". */
9266 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9267 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9268 type
= complex_double_type_node
;
9269 else if (type
== integer_type_node
)
9270 type
= complex_integer_type_node
;
9271 else if (type
== float_type_node
)
9272 type
= complex_float_type_node
;
9273 else if (type
== double_type_node
)
9274 type
= complex_double_type_node
;
9275 else if (type
== long_double_type_node
)
9276 type
= complex_long_double_type_node
;
9278 type
= build_complex_type (type
);
9281 type_quals
= TYPE_UNQUALIFIED
;
9282 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9283 type_quals
|= TYPE_QUAL_CONST
;
9284 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9285 type_quals
|= TYPE_QUAL_VOLATILE
;
9286 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9287 type_quals
|= TYPE_QUAL_RESTRICT
;
9288 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9289 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9292 /* If we're using the injected-class-name to form a compound type or a
9293 declaration, replace it with the underlying class so we don't get
9294 redundant typedefs in the debug output. But if we are returning the
9295 type unchanged, leave it alone so that it's available to
9296 maybe_get_template_decl_from_type_decl. */
9297 if (CLASS_TYPE_P (type
)
9298 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9299 && type
== TREE_TYPE (TYPE_NAME (type
))
9300 && (declarator
|| type_quals
))
9301 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9303 type_quals
|= cp_type_quals (type
);
9304 type
= cp_build_qualified_type_real
9305 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9306 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9307 /* We might have ignored or rejected some of the qualifiers. */
9308 type_quals
= cp_type_quals (type
);
9311 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9312 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9313 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9315 storage_class
= declspecs
->storage_class
;
9316 if (storage_class
== sc_static
)
9317 staticp
= 1 + (decl_context
== FIELD
);
9319 if (virtualp
&& staticp
== 2)
9321 error ("member %qD cannot be declared both virtual and static", dname
);
9322 storage_class
= sc_none
;
9325 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9327 /* Issue errors about use of storage classes for parameters. */
9328 if (decl_context
== PARM
)
9332 error ("typedef declaration invalid in parameter declaration");
9333 return error_mark_node
;
9335 else if (template_parm_flag
&& storage_class
!= sc_none
)
9337 error ("storage class specified for template parameter %qs", name
);
9338 return error_mark_node
;
9340 else if (storage_class
== sc_static
9341 || storage_class
== sc_extern
9343 error ("storage class specifiers invalid in parameter declarations");
9345 /* Function parameters cannot be constexpr. If we saw one, moan
9346 and pretend it wasn't there. */
9349 error ("a parameter cannot be declared %<constexpr%>");
9354 /* Give error if `virtual' is used outside of class declaration. */
9356 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9358 error ("%<virtual%> outside class declaration");
9362 /* Static anonymous unions are dealt with here. */
9363 if (staticp
&& decl_context
== TYPENAME
9365 && ANON_AGGR_TYPE_P (declspecs
->type
))
9366 decl_context
= FIELD
;
9368 /* Warn about storage classes that are invalid for certain
9369 kinds of declarations (parameters, typenames, etc.). */
9372 && storage_class
!= sc_extern
9373 && storage_class
!= sc_static
)
9376 error ("multiple storage classes in declaration of %qs", name
);
9379 if (decl_context
!= NORMAL
9380 && ((storage_class
!= sc_none
9381 && storage_class
!= sc_mutable
)
9384 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9385 && (storage_class
== sc_register
9386 || storage_class
== sc_auto
))
9390 else if (decl_context
== FIELD
9391 /* C++ allows static class elements. */
9392 && storage_class
== sc_static
)
9393 /* C++ also allows inlines and signed and unsigned elements,
9394 but in those cases we don't come in here. */
9398 if (decl_context
== FIELD
)
9399 error ("storage class specified for %qs", name
);
9402 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9403 error ("storage class specified for parameter %qs", name
);
9405 error ("storage class specified for typename");
9407 if (storage_class
== sc_register
9408 || storage_class
== sc_auto
9409 || storage_class
== sc_extern
9411 storage_class
= sc_none
;
9414 else if (storage_class
== sc_extern
&& funcdef_flag
9415 && ! toplevel_bindings_p ())
9416 error ("nested function %qs declared %<extern%>", name
);
9417 else if (toplevel_bindings_p ())
9419 if (storage_class
== sc_auto
)
9420 error ("top-level declaration of %qs specifies %<auto%>", name
);
9423 && storage_class
!= sc_extern
9424 && storage_class
!= sc_static
)
9426 if (declspecs
->gnu_thread_keyword_p
)
9427 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9428 "declared %<__thread%>", name
);
9430 /* When thread_local is applied to a variable of block scope the
9431 storage-class-specifier static is implied if it does not appear
9433 storage_class
= declspecs
->storage_class
= sc_static
;
9437 if (storage_class
&& friendp
)
9439 error ("storage class specifiers invalid in friend function declarations");
9440 storage_class
= sc_none
;
9445 unqualified_id
= NULL_TREE
;
9448 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9449 switch (TREE_CODE (unqualified_id
))
9452 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9453 if (TYPE_P (unqualified_id
))
9454 unqualified_id
= constructor_name (unqualified_id
);
9457 case IDENTIFIER_NODE
:
9458 case TEMPLATE_ID_EXPR
:
9466 if (declspecs
->std_attributes
)
9468 /* Apply the c++11 attributes to the type preceding them. */
9469 input_location
= declspecs
->locations
[ds_std_attribute
];
9470 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9471 input_location
= saved_loc
;
9474 /* Determine the type of the entity declared by recurring on the
9476 for (; declarator
; declarator
= declarator
->declarator
)
9478 const cp_declarator
*inner_declarator
;
9481 if (type
== error_mark_node
)
9482 return error_mark_node
;
9484 attrs
= declarator
->attributes
;
9490 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9491 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9492 if (declarator
->kind
== cdk_function
)
9493 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9494 if (declarator
->kind
== cdk_array
)
9495 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9496 returned_attrs
= decl_attributes (&type
,
9497 chainon (returned_attrs
, attrs
),
9501 if (declarator
->kind
== cdk_id
)
9504 inner_declarator
= declarator
->declarator
;
9506 switch (declarator
->kind
)
9509 type
= create_array_type_for_decl (dname
, type
,
9510 declarator
->u
.array
.bounds
);
9511 if (declarator
->std_attributes
)
9514 The optional attribute-specifier-seq appertains to the
9516 returned_attrs
= chainon (returned_attrs
,
9517 declarator
->std_attributes
);
9525 /* Declaring a function type.
9526 Make sure we have a valid type for the function to return. */
9528 if (type_quals
!= TYPE_UNQUALIFIED
)
9530 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9531 warning (OPT_Wignored_qualifiers
,
9532 "type qualifiers ignored on function return type");
9533 /* We now know that the TYPE_QUALS don't apply to the
9534 decl, but to its return type. */
9535 type_quals
= TYPE_UNQUALIFIED
;
9537 errmsg
= targetm
.invalid_return_type (type
);
9541 type
= integer_type_node
;
9544 /* Error about some types functions can't return. */
9546 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9548 error ("%qs declared as function returning a function", name
);
9549 return error_mark_node
;
9551 if (TREE_CODE (type
) == ARRAY_TYPE
)
9553 error ("%qs declared as function returning an array", name
);
9554 return error_mark_node
;
9557 input_location
= declspecs
->locations
[ds_type_spec
];
9558 abstract_virtuals_error (ACU_RETURN
, type
);
9559 input_location
= saved_loc
;
9561 /* Pick up type qualifiers which should be applied to `this'. */
9562 memfn_quals
= declarator
->u
.function
.qualifiers
;
9563 /* Pick up virt-specifiers. */
9564 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9565 /* And ref-qualifier, too */
9566 rqual
= declarator
->u
.function
.ref_qualifier
;
9567 /* Pick up the exception specifications. */
9568 raises
= declarator
->u
.function
.exception_specification
;
9569 /* If the exception-specification is ill-formed, let's pretend
9570 there wasn't one. */
9571 if (raises
== error_mark_node
)
9574 /* Say it's a definition only for the CALL_EXPR
9575 closest to the identifier. */
9576 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9578 /* Handle a late-specified return type. */
9581 if (type_uses_auto (type
))
9583 if (!declarator
->u
.function
.late_return_type
)
9585 if (current_class_type
9586 && LAMBDA_TYPE_P (current_class_type
))
9587 /* OK for C++11 lambdas. */;
9588 else if (cxx_dialect
< cxx1y
)
9590 error ("%qs function uses "
9591 "%<auto%> type specifier without trailing "
9592 "return type", name
);
9593 inform (input_location
, "deduced return type "
9594 "only available with -std=c++1y or "
9598 error ("virtual function cannot "
9599 "have deduced return type");
9601 else if (!is_auto (type
))
9603 error ("%qs function with trailing return type has"
9604 " %qT as its type rather than plain %<auto%>",
9606 return error_mark_node
;
9609 else if (declarator
->u
.function
.late_return_type
)
9611 if (cxx_dialect
< cxx11
)
9612 /* Not using maybe_warn_cpp0x because this should
9613 always be an error. */
9614 error ("trailing return type only available with "
9615 "-std=c++11 or -std=gnu++11");
9617 error ("%qs function with trailing return type not "
9618 "declared with %<auto%> type specifier", name
);
9619 return error_mark_node
;
9622 type
= splice_late_return_type
9623 (type
, declarator
->u
.function
.late_return_type
);
9624 if (type
== error_mark_node
)
9625 return error_mark_node
;
9627 if (ctype
== NULL_TREE
9628 && decl_context
== FIELD
9630 && (friendp
== 0 || dname
== current_class_name
))
9631 ctype
= current_class_type
;
9633 if (ctype
&& (sfk
== sfk_constructor
9634 || sfk
== sfk_destructor
))
9636 /* We are within a class's scope. If our declarator name
9637 is the same as the class name, and we are defining
9638 a function, then it is a constructor/destructor, and
9639 therefore returns a void type. */
9641 /* ISO C++ 12.4/2. A destructor may not be declared
9642 const or volatile. A destructor may not be static.
9643 A destructor may not be declared with ref-qualifier.
9645 ISO C++ 12.1. A constructor may not be declared
9646 const or volatile. A constructor may not be
9647 virtual. A constructor may not be static.
9648 A constructor may not be declared with ref-qualifier. */
9650 error ((flags
== DTOR_FLAG
)
9651 ? G_("destructor cannot be static member function")
9652 : G_("constructor cannot be static member function"));
9655 error ((flags
== DTOR_FLAG
)
9656 ? G_("destructors may not be cv-qualified")
9657 : G_("constructors may not be cv-qualified"));
9658 memfn_quals
= TYPE_UNQUALIFIED
;
9663 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9664 error ((flags
== DTOR_FLAG
)
9665 ? "destructors may not be ref-qualified"
9666 : "constructors may not be ref-qualified");
9667 rqual
= REF_QUAL_NONE
;
9670 if (decl_context
== FIELD
9671 && !member_function_or_else (ctype
,
9674 return error_mark_node
;
9676 if (flags
!= DTOR_FLAG
)
9678 /* It's a constructor. */
9683 permerror (input_location
, "constructors cannot be declared virtual");
9686 if (decl_context
== FIELD
9687 && sfk
!= sfk_constructor
)
9688 return error_mark_node
;
9690 if (decl_context
== FIELD
)
9696 error ("can%'t initialize friend function %qs", name
);
9699 /* Cannot be both friend and virtual. */
9700 error ("virtual functions cannot be friends");
9703 if (decl_context
== NORMAL
)
9704 error ("friend declaration not in class definition");
9705 if (current_function_decl
&& funcdef_flag
)
9706 error ("can%'t define friend function %qs in a local "
9710 else if (ctype
&& sfk
== sfk_conversion
)
9714 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9719 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9722 if (inner_declarator
9723 && inner_declarator
->kind
== cdk_id
9724 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9725 && arg_types
!= void_list_node
)
9727 error ("destructors may not have parameters");
9728 arg_types
= void_list_node
;
9732 type
= build_function_type (type
, arg_types
);
9733 if (declarator
->std_attributes
)
9736 The optional attribute-specifier-seq appertains to
9737 the function type. */
9738 decl_attributes (&type
, declarator
->std_attributes
,
9746 /* Filter out pointers-to-references and references-to-references.
9747 We can get these if a TYPE_DECL is used. */
9749 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9751 if (declarator
->kind
!= cdk_reference
)
9753 error ("cannot declare pointer to %q#T", type
);
9754 type
= TREE_TYPE (type
);
9757 /* In C++0x, we allow reference to reference declarations
9758 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9759 and template type arguments [14.3.1/4 temp.arg.type]. The
9760 check for direct reference to reference declarations, which
9761 are still forbidden, occurs below. Reasoning behind the change
9762 can be found in DR106, DR540, and the rvalue reference
9764 else if (cxx_dialect
== cxx98
)
9766 error ("cannot declare reference to %q#T", type
);
9767 type
= TREE_TYPE (type
);
9770 else if (VOID_TYPE_P (type
))
9772 if (declarator
->kind
== cdk_reference
)
9773 error ("cannot declare reference to %q#T", type
);
9774 else if (declarator
->kind
== cdk_ptrmem
)
9775 error ("cannot declare pointer to %q#T member", type
);
9778 /* We now know that the TYPE_QUALS don't apply to the decl,
9779 but to the target of the pointer. */
9780 type_quals
= TYPE_UNQUALIFIED
;
9782 /* This code used to handle METHOD_TYPE, but I don't think it's
9783 possible to get it here anymore. */
9784 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9785 if (declarator
->kind
== cdk_ptrmem
9786 && TREE_CODE (type
) == FUNCTION_TYPE
)
9788 memfn_quals
|= type_memfn_quals (type
);
9789 type
= build_memfn_type (type
,
9790 declarator
->u
.pointer
.class_type
,
9793 if (type
== error_mark_node
)
9794 return error_mark_node
;
9796 rqual
= REF_QUAL_NONE
;
9797 memfn_quals
= TYPE_UNQUALIFIED
;
9800 if (TREE_CODE (type
) == FUNCTION_TYPE
9801 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9802 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9803 error (declarator
->kind
== cdk_reference
9804 ? G_("cannot declare reference to qualified function type %qT")
9805 : G_("cannot declare pointer to qualified function type %qT"),
9808 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
)
9809 && (flag_iso
|| warn_vla
> 0))
9810 pedwarn (input_location
, OPT_Wvla
,
9811 declarator
->kind
== cdk_reference
9812 ? G_("reference to array of runtime bound")
9813 : G_("pointer to array of runtime bound"));
9815 /* When the pointed-to type involves components of variable size,
9816 care must be taken to ensure that the size evaluation code is
9817 emitted early enough to dominate all the possible later uses
9818 and late enough for the variables on which it depends to have
9821 This is expected to happen automatically when the pointed-to
9822 type has a name/declaration of it's own, but special attention
9823 is required if the type is anonymous.
9825 We handle the NORMAL and FIELD contexts here by inserting a
9826 dummy statement that just evaluates the size at a safe point
9827 and ensures it is not deferred until e.g. within a deeper
9828 conditional context (c++/43555).
9830 We expect nothing to be needed here for PARM or TYPENAME.
9831 Evaluating the size at this point for TYPENAME would
9832 actually be incorrect, as we might be in the middle of an
9833 expression with side effects on the pointed-to type size
9834 "arguments" prior to the pointer declaration point and the
9835 size evaluation could end up prior to the side effects. */
9837 if (!TYPE_NAME (type
)
9838 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9839 && at_function_scope_p ()
9840 && variably_modified_type_p (type
, NULL_TREE
))
9841 /* Force evaluation of the SAVE_EXPR. */
9842 finish_expr_stmt (TYPE_SIZE (type
));
9844 if (declarator
->kind
== cdk_reference
)
9846 /* In C++0x, the type we are creating a reference to might be
9847 a typedef which is itself a reference type. In that case,
9848 we follow the reference collapsing rules in
9849 [7.1.3/8 dcl.typedef] to create the final reference type:
9851 "If a typedef TD names a type that is a reference to a type
9852 T, an attempt to create the type 'lvalue reference to cv TD'
9853 creates the type 'lvalue reference to T,' while an attempt
9854 to create the type "rvalue reference to cv TD' creates the
9857 if (VOID_TYPE_P (type
))
9858 /* We already gave an error. */;
9859 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9861 if (declarator
->u
.reference
.rvalue_ref
)
9862 /* Leave type alone. */;
9864 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9867 type
= cp_build_reference_type
9868 (type
, declarator
->u
.reference
.rvalue_ref
);
9870 /* In C++0x, we need this check for direct reference to
9871 reference declarations, which are forbidden by
9872 [8.3.2/5 dcl.ref]. Reference to reference declarations
9873 are only allowed indirectly through typedefs and template
9874 type arguments. Example:
9876 void foo(int & &); // invalid ref-to-ref decl
9878 typedef int & int_ref;
9879 void foo(int_ref &); // valid ref-to-ref decl
9881 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9882 error ("cannot declare reference to %q#T, which is not "
9883 "a typedef or a template type argument", type
);
9885 else if (TREE_CODE (type
) == METHOD_TYPE
)
9886 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9887 else if (declarator
->kind
== cdk_ptrmem
)
9889 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9891 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9892 /* We will already have complained. */
9893 type
= error_mark_node
;
9895 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9899 type
= build_pointer_type (type
);
9901 /* Process a list of type modifier keywords (such as
9902 const or volatile) that were given inside the `*' or `&'. */
9904 if (declarator
->u
.pointer
.qualifiers
)
9907 = cp_build_qualified_type (type
,
9908 declarator
->u
.pointer
.qualifiers
);
9909 type_quals
= cp_type_quals (type
);
9912 /* Apply C++11 attributes to the pointer, and not to the
9913 type pointed to. This is unlike what is done for GNU
9914 attributes above. It is to comply with [dcl.ptr]/1:
9916 [the optional attribute-specifier-seq (7.6.1) appertains
9917 to the pointer and not to the object pointed to]. */
9918 if (declarator
->std_attributes
)
9919 decl_attributes (&type
, declarator
->std_attributes
,
9933 /* A `constexpr' specifier used in an object declaration declares
9934 the object as `const'. */
9935 if (constexpr_p
&& innermost_code
!= cdk_function
)
9937 if (type_quals
& TYPE_QUAL_VOLATILE
)
9938 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9939 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9941 type_quals
|= TYPE_QUAL_CONST
;
9942 type
= cp_build_qualified_type (type
, type_quals
);
9946 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9947 && TREE_CODE (type
) != FUNCTION_TYPE
9948 && TREE_CODE (type
) != METHOD_TYPE
)
9950 error ("template-id %qD used as a declarator",
9952 unqualified_id
= dname
;
9955 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9956 qualified with a class-name, turn it into a METHOD_TYPE, unless
9957 we know that the function is static. We take advantage of this
9958 opportunity to do other processing that pertains to entities
9959 explicitly declared to be class members. Note that if DECLARATOR
9960 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9961 would not have exited the loop above. */
9963 && declarator
->u
.id
.qualifying_scope
9964 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9966 ctype
= declarator
->u
.id
.qualifying_scope
;
9967 ctype
= TYPE_MAIN_VARIANT (ctype
);
9968 template_count
= num_template_headers_for_class (ctype
);
9970 if (ctype
== current_class_type
)
9974 permerror (input_location
, "member functions are implicitly friends of their class");
9978 permerror (declarator
->id_loc
,
9979 "extra qualification %<%T::%> on member %qs",
9982 else if (/* If the qualifying type is already complete, then we
9983 can skip the following checks. */
9984 !COMPLETE_TYPE_P (ctype
)
9985 && (/* If the function is being defined, then
9986 qualifying type must certainly be complete. */
9988 /* A friend declaration of "T::f" is OK, even if
9989 "T" is a template parameter. But, if this
9990 function is not a friend, the qualifying type
9992 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9993 /* For a declaration, the type need not be
9994 complete, if either it is dependent (since there
9995 is no meaningful definition of complete in that
9996 case) or the qualifying class is currently being
9998 || !(dependent_type_p (ctype
)
9999 || currently_open_class (ctype
)))
10000 /* Check that the qualifying type is complete. */
10001 && !complete_type_or_else (ctype
, NULL_TREE
))
10002 return error_mark_node
;
10003 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10005 if (current_class_type
10006 && (!friendp
|| funcdef_flag
))
10008 error (funcdef_flag
10009 ? G_("cannot define member function %<%T::%s%> "
10011 : G_("cannot declare member function %<%T::%s%> "
10013 ctype
, name
, current_class_type
);
10014 return error_mark_node
;
10017 else if (typedef_p
&& current_class_type
)
10019 error ("cannot declare member %<%T::%s%> within %qT",
10020 ctype
, name
, current_class_type
);
10021 return error_mark_node
;
10025 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10026 ctype
= current_class_type
;
10028 /* Now TYPE has the actual type. */
10030 if (returned_attrs
)
10033 *attrlist
= chainon (returned_attrs
, *attrlist
);
10035 attrlist
= &returned_attrs
;
10039 && declarator
->kind
== cdk_id
10040 && declarator
->std_attributes
)
10041 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10042 a declarator-id appertains to the entity that is declared. */
10043 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10045 /* Handle parameter packs. */
10046 if (parameter_pack_p
)
10048 if (decl_context
== PARM
)
10049 /* Turn the type into a pack expansion.*/
10050 type
= make_pack_expansion (type
);
10052 error ("non-parameter %qs cannot be a parameter pack", name
);
10055 /* Did array size calculations overflow or does the array cover more
10056 than half of the address-space? */
10057 if (TREE_CODE (type
) == ARRAY_TYPE
10058 && COMPLETE_TYPE_P (type
)
10059 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10060 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10062 error ("size of array %qs is too large", name
);
10063 /* If we proceed with the array type as it is, we'll eventually
10064 crash in tree_to_[su]hwi(). */
10065 type
= error_mark_node
;
10068 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10069 && !processing_template_decl
10070 && variably_modified_type_p (type
, NULL_TREE
))
10072 if (decl_context
== FIELD
)
10073 error ("data member may not have variably modified type %qT", type
);
10075 error ("parameter may not have variably modified type %qT", type
);
10076 type
= error_mark_node
;
10079 if (explicitp
== 1 || (explicitp
&& friendp
))
10081 /* [dcl.fct.spec] The explicit specifier shall only be used in
10082 declarations of constructors within a class definition. */
10083 error ("only declarations of constructors can be %<explicit%>");
10087 if (storage_class
== sc_mutable
)
10089 if (decl_context
!= FIELD
|| friendp
)
10091 error ("non-member %qs cannot be declared %<mutable%>", name
);
10092 storage_class
= sc_none
;
10094 else if (decl_context
== TYPENAME
|| typedef_p
)
10096 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10097 storage_class
= sc_none
;
10099 else if (TREE_CODE (type
) == FUNCTION_TYPE
10100 || TREE_CODE (type
) == METHOD_TYPE
)
10102 error ("function %qs cannot be declared %<mutable%>", name
);
10103 storage_class
= sc_none
;
10107 error ("static %qs cannot be declared %<mutable%>", name
);
10108 storage_class
= sc_none
;
10110 else if (type_quals
& TYPE_QUAL_CONST
)
10112 error ("const %qs cannot be declared %<mutable%>", name
);
10113 storage_class
= sc_none
;
10115 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10117 permerror (input_location
, "reference %qs cannot be declared "
10118 "%<mutable%>", name
);
10119 storage_class
= sc_none
;
10123 /* If this is declaring a typedef name, return a TYPE_DECL. */
10124 if (typedef_p
&& decl_context
!= TYPENAME
)
10128 /* Note that the grammar rejects storage classes
10129 in typenames, fields or parameters. */
10130 if (current_lang_name
== lang_name_java
)
10131 TYPE_FOR_JAVA (type
) = 1;
10133 /* This declaration:
10135 typedef void f(int) const;
10137 declares a function type which is not a member of any
10138 particular class, but which is cv-qualified; for
10139 example "f S::*" declares a pointer to a const-qualified
10140 member function of S. We record the cv-qualification in the
10142 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10144 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10146 /* We have now dealt with these qualifiers. */
10147 memfn_quals
= TYPE_UNQUALIFIED
;
10148 rqual
= REF_QUAL_NONE
;
10151 if (type_uses_auto (type
))
10153 error ("typedef declared %<auto%>");
10154 type
= error_mark_node
;
10157 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
)
10158 && (flag_iso
|| warn_vla
> 0))
10159 pedwarn (input_location
, OPT_Wvla
,
10160 "typedef naming array of runtime bound");
10162 if (decl_context
== FIELD
)
10163 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10165 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10166 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10167 error_at (DECL_SOURCE_LOCATION (decl
),
10168 "typedef name may not be a nested-name-specifier");
10169 TREE_TYPE (decl
) = error_mark_node
;
10172 if (decl_context
!= FIELD
)
10174 if (!current_function_decl
)
10175 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10176 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10177 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10178 (current_function_decl
)))
10179 /* The TYPE_DECL is "abstract" because there will be
10180 clones of this constructor/destructor, and there will
10181 be copies of this TYPE_DECL generated in those
10182 clones. The decloning optimization (for space) may
10183 revert this subsequently if it determines that
10184 the clones should share a common implementation. */
10185 DECL_ABSTRACT (decl
) = 1;
10187 else if (current_class_type
10188 && constructor_name_p (unqualified_id
, current_class_type
))
10189 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10190 "as enclosing class",
10193 /* If the user declares "typedef struct {...} foo" then the
10194 struct will have an anonymous name. Fill that name in now.
10195 Nothing can refer to it, so nothing needs know about the name
10197 if (type
!= error_mark_node
10199 && TYPE_NAME (type
)
10200 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10201 && TYPE_ANONYMOUS_P (type
)
10202 && declspecs
->type_definition_p
10203 && attributes_naming_typedef_ok (*attrlist
)
10204 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10208 /* Replace the anonymous name with the real name everywhere. */
10209 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10211 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10212 /* We do not rename the debug info representing the
10213 anonymous tagged type because the standard says in
10214 [dcl.typedef] that the naming applies only for
10215 linkage purposes. */
10216 /*debug_hooks->set_name (t, decl);*/
10217 TYPE_NAME (t
) = decl
;
10220 if (TYPE_LANG_SPECIFIC (type
))
10221 TYPE_WAS_ANONYMOUS (type
) = 1;
10223 /* If this is a typedef within a template class, the nested
10224 type is a (non-primary) template. The name for the
10225 template needs updating as well. */
10226 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10227 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10228 = TYPE_IDENTIFIER (type
);
10230 /* Adjust linkage now that we aren't anonymous anymore. */
10231 reset_type_linkage (type
);
10233 /* FIXME remangle member functions; member functions of a
10234 type with external linkage have external linkage. */
10238 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10239 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10241 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10242 memfn_quals
!= TYPE_UNQUALIFIED
,
10243 inlinep
, friendp
, raises
!= NULL_TREE
);
10245 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10246 /* Acknowledge that this was written:
10247 `using analias = atype;'. */
10248 TYPE_DECL_ALIAS_P (decl
) = 1;
10253 /* Detect the case of an array type of unspecified size
10254 which came, as such, direct from a typedef name.
10255 We must copy the type, so that the array's domain can be
10256 individually set by the object's initializer. */
10258 if (type
&& typedef_type
10259 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10260 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10261 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10263 /* Detect where we're using a typedef of function type to declare a
10264 function. PARMS will not be set, so we must create it now. */
10266 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10268 tree decls
= NULL_TREE
;
10271 for (args
= TYPE_ARG_TYPES (type
);
10272 args
&& args
!= void_list_node
;
10273 args
= TREE_CHAIN (args
))
10275 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10277 DECL_CHAIN (decl
) = decls
;
10281 parms
= nreverse (decls
);
10283 if (decl_context
!= TYPENAME
)
10285 /* The qualifiers on the function type become the qualifiers on
10286 the non-static member function. */
10287 memfn_quals
|= type_memfn_quals (type
);
10288 rqual
= type_memfn_rqual (type
);
10289 type_quals
= TYPE_UNQUALIFIED
;
10293 /* If this is a type name (such as, in a cast or sizeof),
10294 compute the type and return it now. */
10296 if (decl_context
== TYPENAME
)
10298 /* Note that the grammar rejects storage classes
10299 in typenames, fields or parameters. */
10300 if (type_quals
!= TYPE_UNQUALIFIED
)
10301 type_quals
= TYPE_UNQUALIFIED
;
10303 /* Special case: "friend class foo" looks like a TYPENAME context. */
10306 if (type_quals
!= TYPE_UNQUALIFIED
)
10308 error ("type qualifiers specified for friend class declaration");
10309 type_quals
= TYPE_UNQUALIFIED
;
10313 error ("%<inline%> specified for friend class declaration");
10319 /* Don't allow friend declaration without a class-key. */
10320 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10321 permerror (input_location
, "template parameters cannot be friends");
10322 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10323 permerror (input_location
, "friend declaration requires class-key, "
10324 "i.e. %<friend class %T::%D%>",
10325 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10327 permerror (input_location
, "friend declaration requires class-key, "
10328 "i.e. %<friend %#T%>",
10332 /* Only try to do this stuff if we didn't already give up. */
10333 if (type
!= integer_type_node
)
10335 /* A friendly class? */
10336 if (current_class_type
)
10337 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10338 /*complain=*/true);
10340 error ("trying to make class %qT a friend of global scope",
10343 type
= void_type_node
;
10346 else if (memfn_quals
|| rqual
)
10348 if (ctype
== NULL_TREE
10349 && TREE_CODE (type
) == METHOD_TYPE
)
10350 ctype
= TYPE_METHOD_BASETYPE (type
);
10353 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10354 /* Core issue #547: need to allow this in template type args.
10355 Allow it in general in C++11 for alias-declarations. */
10356 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10357 && TREE_CODE (type
) == FUNCTION_TYPE
)
10358 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10360 error ("invalid qualifiers on non-member function type");
10365 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10366 && decl_context
!= CATCHPARM
10367 && TREE_CODE (type
) != UNION_TYPE
10370 error ("abstract declarator %qT used as declaration", type
);
10371 return error_mark_node
;
10374 /* Only functions may be declared using an operator-function-id. */
10376 && IDENTIFIER_OPNAME_P (unqualified_id
)
10377 && TREE_CODE (type
) != FUNCTION_TYPE
10378 && TREE_CODE (type
) != METHOD_TYPE
)
10380 error ("declaration of %qD as non-function", unqualified_id
);
10381 return error_mark_node
;
10384 /* We don't check parameter types here because we can emit a better
10385 error message later. */
10386 if (decl_context
!= PARM
)
10388 type
= check_var_type (unqualified_id
, type
);
10389 if (type
== error_mark_node
)
10390 return error_mark_node
;
10393 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10394 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10396 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10398 if (ctype
|| in_namespace
)
10399 error ("cannot use %<::%> in parameter declaration");
10401 if (type_uses_auto (type
))
10403 if (cxx_dialect
>= cxx1y
)
10404 error ("%<auto%> parameter not permitted in this context");
10406 error ("parameter declared %<auto%>");
10407 type
= error_mark_node
;
10410 /* A parameter declared as an array of T is really a pointer to T.
10411 One declared as a function is really a pointer to a function.
10412 One declared as a member is really a pointer to member. */
10414 if (TREE_CODE (type
) == ARRAY_TYPE
)
10416 /* Transfer const-ness of array into that of type pointed to. */
10417 type
= build_pointer_type (TREE_TYPE (type
));
10418 type_quals
= TYPE_UNQUALIFIED
;
10420 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10421 type
= build_pointer_type (type
);
10424 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10425 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10427 cp_cv_quals real_quals
= memfn_quals
;
10428 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10429 real_quals
|= TYPE_QUAL_CONST
;
10430 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10436 if (decl_context
== PARM
)
10438 decl
= cp_build_parm_decl (unqualified_id
, type
);
10440 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10441 memfn_quals
!= TYPE_UNQUALIFIED
,
10442 inlinep
, friendp
, raises
!= NULL_TREE
);
10444 else if (decl_context
== FIELD
)
10446 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10447 && type_uses_auto (type
))
10449 error ("non-static data member declared %<auto%>");
10450 type
= error_mark_node
;
10453 /* The C99 flexible array extension. */
10454 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10455 && TYPE_DOMAIN (type
) == NULL_TREE
)
10457 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10458 tf_warning_or_error
);
10459 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10462 if (type
== error_mark_node
)
10464 /* Happens when declaring arrays of sizes which
10465 are error_mark_node, for example. */
10468 else if (in_namespace
&& !friendp
)
10470 /* Something like struct S { int N::j; }; */
10471 error ("invalid use of %<::%>");
10472 return error_mark_node
;
10474 else if (TREE_CODE (type
) == FUNCTION_TYPE
10475 || TREE_CODE (type
) == METHOD_TYPE
)
10478 tree function_context
;
10482 /* This should never happen in pure C++ (the check
10483 could be an assert). It could happen in
10484 Objective-C++ if someone writes invalid code that
10485 uses a function declaration for an instance
10486 variable or property (instance variables and
10487 properties are parsed as FIELD_DECLs, but they are
10488 part of an Objective-C class, not a C++ class).
10489 That code is invalid and is caught by this
10493 error ("declaration of function %qD in invalid context",
10495 return error_mark_node
;
10498 /* ``A union may [ ... ] not [ have ] virtual functions.''
10500 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10502 error ("function %qD declared virtual inside a union",
10504 return error_mark_node
;
10507 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10511 error ("%qD cannot be declared virtual, since it "
10512 "is always static",
10519 /* Check that the name used for a destructor makes sense. */
10520 if (sfk
== sfk_destructor
)
10522 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10526 gcc_assert (friendp
);
10527 error ("expected qualified name in friend declaration "
10528 "for destructor %qD", uqname
);
10529 return error_mark_node
;
10532 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10534 error ("declaration of %qD as member of %qT",
10536 return error_mark_node
;
10540 error ("a destructor cannot be %<constexpr%>");
10541 return error_mark_node
;
10544 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10546 error ("expected qualified name in friend declaration "
10547 "for constructor %qD",
10548 id_declarator
->u
.id
.unqualified_name
);
10549 return error_mark_node
;
10552 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10553 function_context
= (ctype
!= NULL_TREE
) ?
10554 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10555 publicp
= (! friendp
|| ! staticp
)
10556 && function_context
== NULL_TREE
;
10557 decl
= grokfndecl (ctype
, type
,
10558 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10559 ? unqualified_id
: dname
,
10562 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10563 friendp
? -1 : 0, friendp
, publicp
,
10564 inlinep
| (2 * constexpr_p
),
10566 funcdef_flag
, template_count
, in_namespace
,
10567 attrlist
, declarator
->id_loc
);
10568 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10569 if (decl
== NULL_TREE
)
10570 return error_mark_node
;
10572 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10573 /* The decl and setting of decl_attr is also turned off. */
10574 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10577 /* [class.conv.ctor]
10579 A constructor declared without the function-specifier
10580 explicit that can be called with a single parameter
10581 specifies a conversion from the type of its first
10582 parameter to the type of its class. Such a constructor
10583 is called a converting constructor. */
10584 if (explicitp
== 2)
10585 DECL_NONCONVERTING_P (decl
) = 1;
10587 else if (!staticp
&& !dependent_type_p (type
)
10588 && !COMPLETE_TYPE_P (complete_type (type
))
10589 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10591 if (unqualified_id
)
10592 error ("field %qD has incomplete type %qT",
10593 unqualified_id
, type
);
10595 error ("name %qT has incomplete type", type
);
10597 type
= error_mark_node
;
10604 error ("%qE is neither function nor member function; "
10605 "cannot be declared friend", unqualified_id
);
10613 /* Friends are treated specially. */
10614 if (ctype
== current_class_type
)
10615 ; /* We already issued a permerror. */
10616 else if (decl
&& DECL_NAME (decl
))
10618 if (template_class_depth (current_class_type
) == 0)
10620 decl
= check_explicit_specialization
10621 (unqualified_id
, decl
, template_count
,
10622 2 * funcdef_flag
+ 4);
10623 if (decl
== error_mark_node
)
10624 return error_mark_node
;
10627 decl
= do_friend (ctype
, unqualified_id
, decl
,
10633 return error_mark_node
;
10636 /* Structure field. It may not be a function, except for C++. */
10638 if (decl
== NULL_TREE
)
10642 /* C++ allows static class members. All other work
10643 for this is done by grokfield. */
10644 decl
= build_lang_decl_loc (declarator
10645 ? declarator
->id_loc
10647 VAR_DECL
, unqualified_id
, type
);
10648 set_linkage_for_static_data_member (decl
);
10649 /* Even if there is an in-class initialization, DECL
10650 is considered undefined until an out-of-class
10651 definition is provided. */
10652 DECL_EXTERNAL (decl
) = 1;
10656 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10657 if (declspecs
->gnu_thread_keyword_p
)
10658 DECL_GNU_TLS_P (decl
) = true;
10661 if (constexpr_p
&& !initialized
)
10663 error ("constexpr static data member %qD must have an "
10664 "initializer", decl
);
10665 constexpr_p
= false;
10672 error ("non-static data member %qE declared %<constexpr%>",
10674 constexpr_p
= false;
10676 decl
= build_decl (input_location
,
10677 FIELD_DECL
, unqualified_id
, type
);
10678 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10679 if (bitfield
&& !unqualified_id
)
10680 TREE_NO_WARNING (decl
) = 1;
10682 if (storage_class
== sc_mutable
)
10684 DECL_MUTABLE_P (decl
) = 1;
10685 storage_class
= sc_none
;
10690 /* An attempt is being made to initialize a non-static
10691 member. This is new in C++11. */
10692 maybe_warn_cpp0x (CPP0X_NSDMI
);
10694 /* If this has been parsed with static storage class, but
10695 errors forced staticp to be cleared, ensure NSDMI is
10697 if (declspecs
->storage_class
== sc_static
)
10698 DECL_INITIAL (decl
) = error_mark_node
;
10702 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10703 memfn_quals
!= TYPE_UNQUALIFIED
,
10704 inlinep
, friendp
, raises
!= NULL_TREE
);
10707 else if (TREE_CODE (type
) == FUNCTION_TYPE
10708 || TREE_CODE (type
) == METHOD_TYPE
)
10710 tree original_name
;
10713 if (!unqualified_id
)
10714 return error_mark_node
;
10716 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10717 original_name
= dname
;
10719 original_name
= unqualified_id
;
10721 if (storage_class
== sc_auto
)
10722 error ("storage class %<auto%> invalid for function %qs", name
);
10723 else if (storage_class
== sc_register
)
10724 error ("storage class %<register%> invalid for function %qs", name
);
10727 if (declspecs
->gnu_thread_keyword_p
)
10728 error ("storage class %<__thread%> invalid for function %qs",
10731 error ("storage class %<thread_local%> invalid for function %qs",
10735 if (virt_specifiers
)
10736 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10737 /* Function declaration not at top level.
10738 Storage classes other than `extern' are not allowed
10739 and `extern' makes no difference. */
10740 if (! toplevel_bindings_p ()
10741 && (storage_class
== sc_static
10742 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10745 if (storage_class
== sc_static
)
10746 pedwarn (input_location
, OPT_Wpedantic
,
10747 "%<static%> specified invalid for function %qs "
10748 "declared out of global scope", name
);
10750 pedwarn (input_location
, OPT_Wpedantic
,
10751 "%<inline%> specifier invalid for function %qs "
10752 "declared out of global scope", name
);
10755 if (ctype
== NULL_TREE
)
10759 error ("virtual non-class function %qs", name
);
10762 else if (sfk
== sfk_constructor
10763 || sfk
== sfk_destructor
)
10765 error (funcdef_flag
10766 ? G_("%qs defined in a non-class scope")
10767 : G_("%qs declared in a non-class scope"), name
);
10772 /* Record whether the function is public. */
10773 publicp
= (ctype
!= NULL_TREE
10774 || storage_class
!= sc_static
);
10776 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10777 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10779 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10781 template_count
, in_namespace
, attrlist
,
10782 declarator
->id_loc
);
10783 if (decl
== NULL_TREE
)
10784 return error_mark_node
;
10788 int invalid_static
= 0;
10790 /* Don't allow a static member function in a class, and forbid
10791 declaring main to be static. */
10792 if (TREE_CODE (type
) == METHOD_TYPE
)
10794 permerror (input_location
, "cannot declare member function %qD to have "
10795 "static linkage", decl
);
10796 invalid_static
= 1;
10798 else if (current_function_decl
)
10800 /* FIXME need arm citation */
10801 error ("cannot declare static function inside another function");
10802 invalid_static
= 1;
10805 if (invalid_static
)
10808 storage_class
= sc_none
;
10814 /* It's a variable. */
10816 /* An uninitialized decl with `extern' is a reference. */
10817 decl
= grokvardecl (type
, unqualified_id
,
10820 (type_quals
& TYPE_QUAL_CONST
) != 0,
10821 ctype
? ctype
: in_namespace
);
10822 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10823 memfn_quals
!= TYPE_UNQUALIFIED
,
10824 inlinep
, friendp
, raises
!= NULL_TREE
);
10828 DECL_CONTEXT (decl
) = ctype
;
10831 permerror (input_location
, "%<static%> may not be used when defining "
10832 "(as opposed to declaring) a static data member");
10834 storage_class
= sc_none
;
10836 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10838 error ("static member %qD declared %<register%>", decl
);
10839 storage_class
= sc_none
;
10841 if (storage_class
== sc_extern
&& pedantic
)
10843 pedwarn (input_location
, OPT_Wpedantic
,
10844 "cannot explicitly declare member %q#D to have "
10845 "extern linkage", decl
);
10846 storage_class
= sc_none
;
10849 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10851 error ("declaration of constexpr variable %qD is not a definition",
10853 constexpr_p
= false;
10857 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10859 if (toplevel_bindings_p ())
10861 /* It's common practice (and completely valid) to have a const
10862 be initialized and declared extern. */
10863 if (!(type_quals
& TYPE_QUAL_CONST
))
10864 warning (0, "%qs initialized and declared %<extern%>", name
);
10868 error ("%qs has both %<extern%> and initializer", name
);
10869 return error_mark_node
;
10873 /* Record `register' declaration for warnings on &
10874 and in case doing stupid register allocation. */
10876 if (storage_class
== sc_register
)
10877 DECL_REGISTER (decl
) = 1;
10878 else if (storage_class
== sc_extern
)
10879 DECL_THIS_EXTERN (decl
) = 1;
10880 else if (storage_class
== sc_static
)
10881 DECL_THIS_STATIC (decl
) = 1;
10883 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10884 if (constexpr_p
&& VAR_P (decl
))
10885 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10887 /* Record constancy and volatility on the DECL itself . There's
10888 no need to do this when processing a template; we'll do this
10889 for the instantiated declaration based on the type of DECL. */
10890 if (!processing_template_decl
)
10891 cp_apply_type_quals_to_decl (type_quals
, decl
);
10897 /* Subroutine of start_function. Ensure that each of the parameter
10898 types (as listed in PARMS) is complete, as is required for a
10899 function definition. */
10902 require_complete_types_for_parms (tree parms
)
10904 for (; parms
; parms
= DECL_CHAIN (parms
))
10906 if (dependent_type_p (TREE_TYPE (parms
)))
10908 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10909 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10911 relayout_decl (parms
);
10912 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10915 /* grokparms or complete_type_or_else will have already issued
10917 TREE_TYPE (parms
) = error_mark_node
;
10921 /* Returns nonzero if T is a local variable. */
10924 local_variable_p (const_tree t
)
10927 /* A VAR_DECL with a context that is a _TYPE is a static data
10929 && !TYPE_P (CP_DECL_CONTEXT (t
))
10930 /* Any other non-local variable must be at namespace scope. */
10931 && !DECL_NAMESPACE_SCOPE_P (t
))
10932 || (TREE_CODE (t
) == PARM_DECL
))
10938 /* Like local_variable_p, but suitable for use as a tree-walking
10942 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10945 if (local_variable_p (*tp
)
10946 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
10948 else if (TYPE_P (*tp
))
10949 *walk_subtrees
= 0;
10954 /* Check that ARG, which is a default-argument expression for a
10955 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10956 something goes wrong. DECL may also be a _TYPE node, rather than a
10957 DECL, if there is no DECL available. */
10960 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
10965 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10966 /* We get a DEFAULT_ARG when looking at an in-class declaration
10967 with a default argument. Ignore the argument for now; we'll
10968 deal with it after the class is complete. */
10977 decl_type
= TREE_TYPE (decl
);
10979 if (arg
== error_mark_node
10980 || decl
== error_mark_node
10981 || TREE_TYPE (arg
) == error_mark_node
10982 || decl_type
== error_mark_node
)
10983 /* Something already went wrong. There's no need to check
10985 return error_mark_node
;
10987 /* [dcl.fct.default]
10989 A default argument expression is implicitly converted to the
10991 ++cp_unevaluated_operand
;
10992 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
10994 --cp_unevaluated_operand
;
10996 if (warn_zero_as_null_pointer_constant
10997 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
10998 && null_ptr_cst_p (arg
)
10999 && (complain
& tf_warning
)
11000 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
11001 return nullptr_node
;
11003 /* [dcl.fct.default]
11005 Local variables shall not be used in default argument
11008 The keyword `this' shall not be used in a default argument of a
11009 member function. */
11010 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11013 if (complain
& tf_warning_or_error
)
11015 if (DECL_NAME (var
) == this_identifier
)
11016 permerror (input_location
, "default argument %qE uses %qD",
11019 error ("default argument %qE uses local variable %qD", arg
, var
);
11021 return error_mark_node
;
11028 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11031 type_is_deprecated (tree type
)
11033 enum tree_code code
;
11034 if (TREE_DEPRECATED (type
))
11036 if (TYPE_NAME (type
)
11037 && TREE_DEPRECATED (TYPE_NAME (type
)))
11040 /* Do warn about using typedefs to a deprecated class. */
11041 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11042 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11044 code
= TREE_CODE (type
);
11046 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11047 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11048 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11049 return type_is_deprecated (TREE_TYPE (type
));
11051 if (TYPE_PTRMEMFUNC_P (type
))
11052 return type_is_deprecated
11053 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11058 /* Decode the list of parameter types for a function type.
11059 Given the list of things declared inside the parens,
11060 return a list of types.
11062 If this parameter does not end with an ellipsis, we append
11065 *PARMS is set to the chain of PARM_DECLs created. */
11068 grokparms (tree parmlist
, tree
*parms
)
11070 tree result
= NULL_TREE
;
11071 tree decls
= NULL_TREE
;
11075 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11077 tree type
= NULL_TREE
;
11078 tree init
= TREE_PURPOSE (parm
);
11079 tree decl
= TREE_VALUE (parm
);
11080 const char *errmsg
;
11082 if (parm
== void_list_node
)
11085 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11088 type
= TREE_TYPE (decl
);
11089 if (VOID_TYPE_P (type
))
11091 if (same_type_p (type
, void_type_node
)
11092 && DECL_SELF_REFERENCE_P (type
)
11093 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
11094 /* this is a parmlist of `(void)', which is ok. */
11096 cxx_incomplete_type_error (decl
, type
);
11097 /* It's not a good idea to actually create parameters of
11098 type `void'; other parts of the compiler assume that a
11099 void type terminates the parameter list. */
11100 type
= error_mark_node
;
11101 TREE_TYPE (decl
) = error_mark_node
;
11104 if (type
!= error_mark_node
11105 && TYPE_FOR_JAVA (type
)
11106 && MAYBE_CLASS_TYPE_P (type
))
11108 error ("parameter %qD has Java class type", decl
);
11109 type
= error_mark_node
;
11110 TREE_TYPE (decl
) = error_mark_node
;
11114 if (type
!= error_mark_node
11115 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11118 type
= error_mark_node
;
11119 TREE_TYPE (decl
) = error_mark_node
;
11122 if (type
!= error_mark_node
)
11124 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11126 tree deptype
= type_is_deprecated (type
);
11128 warn_deprecated_use (deptype
, NULL_TREE
);
11131 /* Top-level qualifiers on the parameters are
11132 ignored for function types. */
11133 type
= cp_build_qualified_type (type
, 0);
11134 if (TREE_CODE (type
) == METHOD_TYPE
)
11136 error ("parameter %qD invalidly declared method type", decl
);
11137 type
= build_pointer_type (type
);
11138 TREE_TYPE (decl
) = type
;
11140 else if (abstract_virtuals_error (decl
, type
))
11141 any_error
= 1; /* Seems like a good idea. */
11142 else if (POINTER_TYPE_P (type
))
11144 /* [dcl.fct]/6, parameter types cannot contain pointers
11145 (references) to arrays of unknown bound. */
11146 tree t
= TREE_TYPE (type
);
11147 int ptr
= TYPE_PTR_P (type
);
11151 if (TYPE_PTR_P (t
))
11153 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11155 else if (!TYPE_DOMAIN (t
))
11159 if (TREE_CODE (t
) == ARRAY_TYPE
)
11161 ? G_("parameter %qD includes pointer to array of "
11162 "unknown bound %qT")
11163 : G_("parameter %qD includes reference to array of "
11164 "unknown bound %qT"),
11170 else if (init
&& !processing_template_decl
)
11171 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11174 DECL_CHAIN (decl
) = decls
;
11176 result
= tree_cons (init
, type
, result
);
11178 decls
= nreverse (decls
);
11179 result
= nreverse (result
);
11181 result
= chainon (result
, void_list_node
);
11188 /* D is a constructor or overloaded `operator='.
11190 Let T be the class in which D is declared. Then, this function
11193 -1 if D's is an ill-formed constructor or copy assignment operator
11194 whose first parameter is of type `T'.
11195 0 if D is not a copy constructor or copy assignment
11197 1 if D is a copy constructor or copy assignment operator whose
11198 first parameter is a reference to non-const qualified T.
11199 2 if D is a copy constructor or copy assignment operator whose
11200 first parameter is a reference to const qualified T.
11202 This function can be used as a predicate. Positive values indicate
11203 a copy constructor and nonzero values indicate a copy assignment
11207 copy_fn_p (const_tree d
)
11213 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11215 if (TREE_CODE (d
) == TEMPLATE_DECL
11216 || (DECL_TEMPLATE_INFO (d
)
11217 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11218 /* Instantiations of template member functions are never copy
11219 functions. Note that member functions of templated classes are
11220 represented as template functions internally, and we must
11221 accept those as copy functions. */
11224 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11228 arg_type
= TREE_VALUE (args
);
11229 if (arg_type
== error_mark_node
)
11232 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11234 /* Pass by value copy assignment operator. */
11237 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11238 && !TYPE_REF_IS_RVALUE (arg_type
)
11239 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11241 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11247 args
= TREE_CHAIN (args
);
11249 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11250 /* There are more non-optional args. */
11256 /* D is a constructor or overloaded `operator='.
11258 Let T be the class in which D is declared. Then, this function
11259 returns true when D is a move constructor or move assignment
11260 operator, false otherwise. */
11263 move_fn_p (const_tree d
)
11265 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11267 if (cxx_dialect
== cxx98
)
11268 /* There are no move constructors if we are in C++98 mode. */
11271 if (TREE_CODE (d
) == TEMPLATE_DECL
11272 || (DECL_TEMPLATE_INFO (d
)
11273 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11274 /* Instantiations of template member functions are never move
11275 functions. Note that member functions of templated classes are
11276 represented as template functions internally, and we must
11277 accept those as move functions. */
11280 return move_signature_fn_p (d
);
11283 /* D is a constructor or overloaded `operator='.
11285 Then, this function returns true when D has the same signature as a move
11286 constructor or move assignment operator (because either it is such a
11287 ctor/op= or it is a template specialization with the same signature),
11288 false otherwise. */
11291 move_signature_fn_p (const_tree d
)
11295 bool result
= false;
11297 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11301 arg_type
= TREE_VALUE (args
);
11302 if (arg_type
== error_mark_node
)
11305 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11306 && TYPE_REF_IS_RVALUE (arg_type
)
11307 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11311 args
= TREE_CHAIN (args
);
11313 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11314 /* There are more non-optional args. */
11320 /* Remember any special properties of member function DECL. */
11323 grok_special_member_properties (tree decl
)
11327 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11330 class_type
= DECL_CONTEXT (decl
);
11331 if (DECL_CONSTRUCTOR_P (decl
))
11333 int ctor
= copy_fn_p (decl
);
11335 if (!DECL_ARTIFICIAL (decl
))
11336 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11342 A non-template constructor for class X is a copy
11343 constructor if its first parameter is of type X&, const
11344 X&, volatile X& or const volatile X&, and either there
11345 are no other parameters or else all other parameters have
11346 default arguments. */
11347 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11348 if (user_provided_p (decl
))
11349 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11351 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11353 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11355 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11356 if (user_provided_p (decl
))
11357 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11359 else if (move_fn_p (decl
) && user_provided_p (decl
))
11360 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11361 else if (is_list_ctor (decl
))
11362 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11364 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11365 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11366 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11368 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11372 A non-template assignment operator for class X is a copy
11373 assignment operator if its parameter is of type X, X&, const
11374 X&, volatile X& or const volatile X&. */
11376 int assop
= copy_fn_p (decl
);
11380 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11381 if (user_provided_p (decl
))
11382 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11384 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11386 else if (move_fn_p (decl
) && user_provided_p (decl
))
11387 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11389 /* Destructors are handled in check_methods. */
11392 /* Check a constructor DECL has the correct form. Complains
11393 if the class has a constructor of the form X(X). */
11396 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11398 int ctor_parm
= copy_fn_p (decl
);
11404 A declaration of a constructor for a class X is ill-formed if
11405 its first parameter is of type (optionally cv-qualified) X
11406 and either there are no other parameters or else all other
11407 parameters have default arguments.
11409 We *don't* complain about member template instantiations that
11410 have this form, though; they can occur as we try to decide
11411 what constructor to use during overload resolution. Since
11412 overload resolution will never prefer such a constructor to
11413 the non-template copy constructor (which is either explicitly
11414 or implicitly defined), there's no need to worry about their
11415 existence. Theoretically, they should never even be
11416 instantiated, but that's hard to forestall. */
11417 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11425 /* An operator with this code is unary, but can also be binary. */
11428 ambi_op_p (enum tree_code code
)
11430 return (code
== INDIRECT_REF
11431 || code
== ADDR_EXPR
11432 || code
== UNARY_PLUS_EXPR
11433 || code
== NEGATE_EXPR
11434 || code
== PREINCREMENT_EXPR
11435 || code
== PREDECREMENT_EXPR
);
11438 /* An operator with this name can only be unary. */
11441 unary_op_p (enum tree_code code
)
11443 return (code
== TRUTH_NOT_EXPR
11444 || code
== BIT_NOT_EXPR
11445 || code
== COMPONENT_REF
11446 || code
== TYPE_EXPR
);
11449 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11450 errors are issued for invalid declarations. */
11453 grok_op_properties (tree decl
, bool complain
)
11455 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11457 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11458 tree name
= DECL_NAME (decl
);
11459 enum tree_code operator_code
;
11464 /* Count the number of arguments and check for ellipsis. */
11465 for (argtype
= argtypes
, arity
= 0;
11466 argtype
&& argtype
!= void_list_node
;
11467 argtype
= TREE_CHAIN (argtype
))
11469 ellipsis_p
= !argtype
;
11471 class_type
= DECL_CONTEXT (decl
);
11472 if (class_type
&& !CLASS_TYPE_P (class_type
))
11473 class_type
= NULL_TREE
;
11475 if (DECL_CONV_FN_P (decl
))
11476 operator_code
= TYPE_EXPR
;
11480 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11481 if (ansi_opname (CODE) == name) \
11483 operator_code = (CODE); \
11486 else if (ansi_assopname (CODE) == name) \
11488 operator_code = (CODE); \
11489 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11493 #include "operators.def"
11494 #undef DEF_OPERATOR
11496 gcc_unreachable ();
11499 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11500 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11503 switch (operator_code
)
11506 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11510 TYPE_GETS_DELETE (class_type
) |= 1;
11514 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11517 case VEC_DELETE_EXPR
:
11518 TYPE_GETS_DELETE (class_type
) |= 2;
11525 /* [basic.std.dynamic.allocation]/1:
11527 A program is ill-formed if an allocation function is declared
11528 in a namespace scope other than global scope or declared static
11531 The same also holds true for deallocation functions. */
11532 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11533 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11535 if (DECL_NAMESPACE_SCOPE_P (decl
))
11537 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11539 error ("%qD may not be declared within a namespace", decl
);
11542 else if (!TREE_PUBLIC (decl
))
11544 error ("%qD may not be declared as static", decl
);
11550 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11552 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11553 DECL_IS_OPERATOR_NEW (decl
) = 1;
11555 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11556 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11559 /* An operator function must either be a non-static member function
11560 or have at least one parameter of a class, a reference to a class,
11561 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11562 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11564 if (operator_code
== TYPE_EXPR
11565 || operator_code
== CALL_EXPR
11566 || operator_code
== COMPONENT_REF
11567 || operator_code
== ARRAY_REF
11568 || operator_code
== NOP_EXPR
)
11570 error ("%qD must be a nonstatic member function", decl
);
11577 if (DECL_STATIC_FUNCTION_P (decl
))
11579 error ("%qD must be either a non-static member "
11580 "function or a non-member function", decl
);
11584 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11586 tree arg
= non_reference (TREE_VALUE (p
));
11587 if (arg
== error_mark_node
)
11590 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11591 because these checks are performed even on
11592 template functions. */
11593 if (MAYBE_CLASS_TYPE_P (arg
)
11594 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11598 if (!p
|| p
== void_list_node
)
11601 error ("%qD must have an argument of class or "
11602 "enumerated type", decl
);
11608 /* There are no restrictions on the arguments to an overloaded
11610 if (operator_code
== CALL_EXPR
)
11613 /* Warn about conversion operators that will never be used. */
11614 if (IDENTIFIER_TYPENAME_P (name
)
11615 && ! DECL_TEMPLATE_INFO (decl
)
11617 /* Warn only declaring the function; there is no need to
11618 warn again about out-of-class definitions. */
11619 && class_type
== current_class_type
)
11621 tree t
= TREE_TYPE (name
);
11622 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11625 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11627 if (VOID_TYPE_P (t
))
11628 warning (OPT_Wconversion
,
11630 ? G_("conversion to a reference to void "
11631 "will never use a type conversion operator")
11632 : G_("conversion to void "
11633 "will never use a type conversion operator"));
11634 else if (class_type
)
11636 if (t
== class_type
)
11637 warning (OPT_Wconversion
,
11639 ? G_("conversion to a reference to the same type "
11640 "will never use a type conversion operator")
11641 : G_("conversion to the same type "
11642 "will never use a type conversion operator"));
11643 /* Don't force t to be complete here. */
11644 else if (MAYBE_CLASS_TYPE_P (t
)
11645 && COMPLETE_TYPE_P (t
)
11646 && DERIVED_FROM_P (t
, class_type
))
11647 warning (OPT_Wconversion
,
11649 ? G_("conversion to a reference to a base class "
11650 "will never use a type conversion operator")
11651 : G_("conversion to a base class "
11652 "will never use a type conversion operator"));
11657 if (operator_code
== COND_EXPR
)
11660 error ("ISO C++ prohibits overloading operator ?:");
11663 else if (ellipsis_p
)
11665 error ("%qD must not have variable number of arguments", decl
);
11668 else if (ambi_op_p (operator_code
))
11671 /* We pick the one-argument operator codes by default, so
11672 we don't have to change anything. */
11674 else if (arity
== 2)
11676 /* If we thought this was a unary operator, we now know
11677 it to be a binary operator. */
11678 switch (operator_code
)
11681 operator_code
= MULT_EXPR
;
11685 operator_code
= BIT_AND_EXPR
;
11688 case UNARY_PLUS_EXPR
:
11689 operator_code
= PLUS_EXPR
;
11693 operator_code
= MINUS_EXPR
;
11696 case PREINCREMENT_EXPR
:
11697 operator_code
= POSTINCREMENT_EXPR
;
11700 case PREDECREMENT_EXPR
:
11701 operator_code
= POSTDECREMENT_EXPR
;
11705 gcc_unreachable ();
11708 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11710 if ((operator_code
== POSTINCREMENT_EXPR
11711 || operator_code
== POSTDECREMENT_EXPR
)
11712 && ! processing_template_decl
11713 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11716 error ("postfix %qD must take %<int%> as its argument",
11719 error ("postfix %qD must take %<int%> as its second "
11727 error ("%qD must take either zero or one argument", decl
);
11729 error ("%qD must take either one or two arguments", decl
);
11733 /* More Effective C++ rule 6. */
11735 && (operator_code
== POSTINCREMENT_EXPR
11736 || operator_code
== POSTDECREMENT_EXPR
11737 || operator_code
== PREINCREMENT_EXPR
11738 || operator_code
== PREDECREMENT_EXPR
))
11740 tree arg
= TREE_VALUE (argtypes
);
11741 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11742 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11743 arg
= TREE_TYPE (arg
);
11744 arg
= TYPE_MAIN_VARIANT (arg
);
11745 if (operator_code
== PREINCREMENT_EXPR
11746 || operator_code
== PREDECREMENT_EXPR
)
11748 if (TREE_CODE (ret
) != REFERENCE_TYPE
11749 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11751 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11752 build_reference_type (arg
));
11756 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11757 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11761 else if (unary_op_p (operator_code
))
11766 error ("%qD must take %<void%>", decl
);
11768 error ("%qD must take exactly one argument", decl
);
11772 else /* if (binary_op_p (operator_code)) */
11777 error ("%qD must take exactly one argument", decl
);
11779 error ("%qD must take exactly two arguments", decl
);
11783 /* More Effective C++ rule 7. */
11785 && (operator_code
== TRUTH_ANDIF_EXPR
11786 || operator_code
== TRUTH_ORIF_EXPR
11787 || operator_code
== COMPOUND_EXPR
))
11788 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11792 /* Effective C++ rule 23. */
11795 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11796 && (operator_code
== PLUS_EXPR
11797 || operator_code
== MINUS_EXPR
11798 || operator_code
== TRUNC_DIV_EXPR
11799 || operator_code
== MULT_EXPR
11800 || operator_code
== TRUNC_MOD_EXPR
)
11801 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11802 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11804 /* [over.oper]/8 */
11805 for (; argtypes
&& argtypes
!= void_list_node
;
11806 argtypes
= TREE_CHAIN (argtypes
))
11807 if (TREE_PURPOSE (argtypes
))
11809 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11810 if (operator_code
== POSTINCREMENT_EXPR
11811 || operator_code
== POSTDECREMENT_EXPR
)
11813 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11818 error ("%qD cannot have default arguments", decl
);
11826 /* Return a string giving the keyword associate with CODE. */
11828 static const char *
11829 tag_name (enum tag_types code
)
11841 case typename_type
:
11844 gcc_unreachable ();
11848 /* Name lookup in an elaborated-type-specifier (after the keyword
11849 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11850 elaborated-type-specifier is invalid, issue a diagnostic and return
11851 error_mark_node; otherwise, return the *_TYPE to which it referred.
11852 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11855 check_elaborated_type_specifier (enum tag_types tag_code
,
11857 bool allow_template_p
)
11863 struct S { struct S *p; };
11865 name lookup will find the TYPE_DECL for the implicit "S::S"
11866 typedef. Adjust for that here. */
11867 if (DECL_SELF_REFERENCE_P (decl
))
11868 decl
= TYPE_NAME (TREE_TYPE (decl
));
11870 type
= TREE_TYPE (decl
);
11872 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11873 is false for this case as well. */
11874 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11876 error ("using template type parameter %qT after %qs",
11877 type
, tag_name (tag_code
));
11878 return error_mark_node
;
11880 /* Accept template template parameters. */
11881 else if (allow_template_p
11882 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11883 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11887 If the identifier resolves to a typedef-name or the
11888 simple-template-id resolves to an alias template
11889 specialization, the elaborated-type-specifier is ill-formed.
11891 In other words, the only legitimate declaration to use in the
11892 elaborated type specifier is the implicit typedef created when
11893 the type is declared. */
11894 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11895 && !DECL_SELF_REFERENCE_P (decl
)
11896 && tag_code
!= typename_type
)
11898 if (alias_template_specialization_p (type
))
11899 error ("using alias template specialization %qT after %qs",
11900 type
, tag_name (tag_code
));
11902 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11903 inform (DECL_SOURCE_LOCATION (decl
),
11904 "%qD has a previous declaration here", decl
);
11905 return error_mark_node
;
11907 else if (TREE_CODE (type
) != RECORD_TYPE
11908 && TREE_CODE (type
) != UNION_TYPE
11909 && tag_code
!= enum_type
11910 && tag_code
!= typename_type
)
11912 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11913 inform (input_location
, "%q+T has a previous declaration here", type
);
11914 return error_mark_node
;
11916 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11917 && tag_code
== enum_type
)
11919 error ("%qT referred to as enum", type
);
11920 inform (input_location
, "%q+T has a previous declaration here", type
);
11921 return error_mark_node
;
11923 else if (!allow_template_p
11924 && TREE_CODE (type
) == RECORD_TYPE
11925 && CLASSTYPE_IS_TEMPLATE (type
))
11927 /* If a class template appears as elaborated type specifier
11928 without a template header such as:
11930 template <class T> class C {};
11931 void f(class C); // No template header here
11933 then the required template argument is missing. */
11934 error ("template argument required for %<%s %T%>",
11935 tag_name (tag_code
),
11936 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11937 return error_mark_node
;
11943 /* Lookup NAME in elaborate type specifier in scope according to
11944 SCOPE and issue diagnostics if necessary.
11945 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11946 found, and ERROR_MARK_NODE for type error. */
11949 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11950 tag_scope scope
, bool template_header_p
)
11954 if (scope
== ts_global
)
11956 /* First try ordinary name lookup, ignoring hidden class name
11957 injected via friend declaration. */
11958 decl
= lookup_name_prefer_type (name
, 2);
11959 /* If that fails, the name will be placed in the smallest
11960 non-class, non-function-prototype scope according to 3.3.1/5.
11961 We may already have a hidden name declared as friend in this
11962 scope. So lookup again but not ignoring hidden names.
11963 If we find one, that name will be made visible rather than
11964 creating a new tag. */
11966 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11969 decl
= lookup_type_scope (name
, scope
);
11972 && (DECL_CLASS_TEMPLATE_P (decl
)
11973 /* If scope is ts_current we're defining a class, so ignore a
11974 template template parameter. */
11975 || (scope
!= ts_current
11976 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
11977 decl
= DECL_TEMPLATE_RESULT (decl
);
11979 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11981 /* Look for invalid nested type:
11985 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11987 error ("%qD has the same name as the class in which it is "
11990 return error_mark_node
;
11993 /* Two cases we need to consider when deciding if a class
11994 template is allowed as an elaborated type specifier:
11995 1. It is a self reference to its own class.
11996 2. It comes with a template header.
12000 template <class T> class C {
12001 class C *c1; // DECL_SELF_REFERENCE_P is true
12004 template <class U> class C; // template_header_p is true
12005 template <class T> class C<T>::D {
12006 class C *c2; // DECL_SELF_REFERENCE_P is true
12009 t
= check_elaborated_type_specifier (tag_code
,
12012 | DECL_SELF_REFERENCE_P (decl
));
12015 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12017 error ("reference to %qD is ambiguous", name
);
12018 print_candidates (decl
);
12019 return error_mark_node
;
12025 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12026 Define the tag as a forward-reference if it is not defined.
12028 If a declaration is given, process it here, and report an error if
12029 multiple declarations are not identical.
12031 SCOPE is TS_CURRENT when this is also a definition. Only look in
12032 the current frame for the name (since C++ allows new names in any
12033 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12034 declaration. Only look beginning from the current scope outward up
12035 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12037 TEMPLATE_HEADER_P is true when this declaration is preceded by
12038 a set of template parameters. */
12041 xref_tag_1 (enum tag_types tag_code
, tree name
,
12042 tag_scope orig_scope
, bool template_header_p
)
12044 enum tree_code code
;
12046 tree context
= NULL_TREE
;
12049 gcc_assert (identifier_p (name
));
12055 code
= RECORD_TYPE
;
12061 code
= ENUMERAL_TYPE
;
12064 gcc_unreachable ();
12067 if (orig_scope
== ts_lambda
)
12068 scope
= ts_current
;
12070 scope
= orig_scope
;
12072 /* In case of anonymous name, xref_tag is only called to
12073 make type node and push name. Name lookup is not required. */
12074 if (ANON_AGGRNAME_P (name
))
12077 t
= lookup_and_check_tag (tag_code
, name
,
12078 scope
, template_header_p
);
12080 if (t
== error_mark_node
)
12081 return error_mark_node
;
12083 if (scope
!= ts_current
&& t
&& current_class_type
12084 && template_class_depth (current_class_type
)
12085 && template_header_p
)
12087 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12090 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12091 definition of this tag. Since, in addition, we are currently
12092 processing a (member) template declaration of a template
12093 class, we must be very careful; consider:
12100 { template <class V>
12101 friend struct S1; };
12103 Here, the S2::S1 declaration should not be confused with the
12104 outer declaration. In particular, the inner version should
12105 have a template parameter of level 2, not level 1. This
12106 would be particularly important if the member declaration
12109 template <class V = U> friend struct S1;
12111 say, when we should tsubst into `U' when instantiating
12112 S2. On the other hand, when presented with:
12122 we must find the inner binding eventually. We
12123 accomplish this by making sure that the new type we
12124 create to represent this declaration has the right
12126 context
= TYPE_CONTEXT (t
);
12132 /* If no such tag is yet defined, create a forward-reference node
12133 and record it as the "definition".
12134 When a real declaration of this type is found,
12135 the forward-reference will be altered into a real type. */
12136 if (code
== ENUMERAL_TYPE
)
12138 error ("use of enum %q#D without previous declaration", name
);
12139 return error_mark_node
;
12143 t
= make_class_type (code
);
12144 TYPE_CONTEXT (t
) = context
;
12145 if (orig_scope
== ts_lambda
)
12146 /* Remember that we're declaring a lambda to avoid bogus errors
12147 in push_template_decl. */
12148 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12149 t
= pushtag (name
, t
, scope
);
12154 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12156 if (!redeclare_class_template (t
, current_template_parms
))
12157 return error_mark_node
;
12159 else if (!processing_template_decl
12160 && CLASS_TYPE_P (t
)
12161 && CLASSTYPE_IS_TEMPLATE (t
))
12163 error ("redeclaration of %qT as a non-template", t
);
12164 error ("previous declaration %q+D", t
);
12165 return error_mark_node
;
12168 /* Make injected friend class visible. */
12169 if (scope
!= ts_within_enclosing_non_class
12170 && hidden_name_p (TYPE_NAME (t
)))
12172 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12173 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12175 if (TYPE_TEMPLATE_INFO (t
))
12177 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12178 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12186 /* Wrapper for xref_tag_1. */
12189 xref_tag (enum tag_types tag_code
, tree name
,
12190 tag_scope scope
, bool template_header_p
)
12194 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12195 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12196 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12202 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12204 enum tag_types tag_kind
;
12206 if (TREE_CODE (old
) == RECORD_TYPE
)
12207 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12209 tag_kind
= union_type
;
12211 if (id
== NULL_TREE
)
12212 id
= TYPE_IDENTIFIER (old
);
12214 return xref_tag (tag_kind
, id
, scope
, false);
12217 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12218 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12219 access_* node, and the TREE_VALUE is the type of the base-class.
12220 Non-NULL TREE_TYPE indicates virtual inheritance.
12222 Returns true if the binfo hierarchy was successfully created,
12223 false if an error was detected. */
12226 xref_basetypes (tree ref
, tree base_list
)
12229 tree binfo
, base_binfo
;
12230 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12231 unsigned max_bases
= 0; /* Maximum direct bases. */
12233 tree default_access
;
12234 tree igo_prev
; /* Track Inheritance Graph Order. */
12236 if (ref
== error_mark_node
)
12239 /* The base of a derived class is private by default, all others are
12241 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12242 && CLASSTYPE_DECLARED_CLASS (ref
)
12243 ? access_private_node
: access_public_node
);
12245 /* First, make sure that any templates in base-classes are
12246 instantiated. This ensures that if we call ourselves recursively
12247 we do not get confused about which classes are marked and which
12249 basep
= &base_list
;
12252 tree basetype
= TREE_VALUE (*basep
);
12254 /* The dependent_type_p call below should really be dependent_scope_p
12255 so that we give a hard error about using an incomplete type as a
12256 base, but we allow it with a pedwarn for backward
12258 if (processing_template_decl
12259 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12260 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12261 if (!dependent_type_p (basetype
)
12262 && !complete_type_or_else (basetype
, NULL
))
12263 /* An incomplete type. Remove it from the list. */
12264 *basep
= TREE_CHAIN (*basep
);
12268 if (TREE_TYPE (*basep
))
12270 if (CLASS_TYPE_P (basetype
))
12271 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12272 basep
= &TREE_CHAIN (*basep
);
12276 TYPE_MARKED_P (ref
) = 1;
12278 /* The binfo slot should be empty, unless this is an (ill-formed)
12280 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12282 error ("redefinition of %q#T", ref
);
12286 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12288 binfo
= make_tree_binfo (max_bases
);
12290 TYPE_BINFO (ref
) = binfo
;
12291 BINFO_OFFSET (binfo
) = size_zero_node
;
12292 BINFO_TYPE (binfo
) = ref
;
12294 /* Apply base-class info set up to the variants of this type. */
12295 fixup_type_variants (ref
);
12299 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12300 /* An aggregate cannot have baseclasses. */
12301 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12303 if (TREE_CODE (ref
) == UNION_TYPE
)
12305 error ("derived union %qT invalid", ref
);
12312 if (TYPE_FOR_JAVA (ref
))
12314 error ("Java class %qT cannot have multiple bases", ref
);
12321 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12323 if (TYPE_FOR_JAVA (ref
))
12325 error ("Java class %qT cannot have virtual bases", ref
);
12330 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12332 tree access
= TREE_PURPOSE (base_list
);
12333 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12334 tree basetype
= TREE_VALUE (base_list
);
12336 if (access
== access_default_node
)
12337 access
= default_access
;
12339 if (PACK_EXPANSION_P (basetype
))
12340 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12341 if (TREE_CODE (basetype
) == TYPE_DECL
)
12342 basetype
= TREE_TYPE (basetype
);
12343 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12345 error ("base type %qT fails to be a struct or class type",
12350 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12351 TYPE_FOR_JAVA (ref
) = 1;
12353 base_binfo
= NULL_TREE
;
12354 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12356 base_binfo
= TYPE_BINFO (basetype
);
12357 /* The original basetype could have been a typedef'd type. */
12358 basetype
= BINFO_TYPE (base_binfo
);
12360 /* Inherit flags from the base. */
12361 TYPE_HAS_NEW_OPERATOR (ref
)
12362 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12363 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12364 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12365 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12366 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12367 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12368 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12369 CLASSTYPE_REPEATED_BASE_P (ref
)
12370 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12373 /* We must do this test after we've seen through a typedef
12375 if (TYPE_MARKED_P (basetype
))
12377 if (basetype
== ref
)
12378 error ("recursive type %qT undefined", basetype
);
12380 error ("duplicate base type %qT invalid", basetype
);
12384 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12385 /* Regenerate the pack expansion for the bases. */
12386 basetype
= make_pack_expansion (basetype
);
12388 TYPE_MARKED_P (basetype
) = 1;
12390 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12391 &igo_prev
, via_virtual
);
12392 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12393 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12395 BINFO_BASE_APPEND (binfo
, base_binfo
);
12396 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12399 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12400 /* If we didn't get max_vbases vbases, we must have shared at
12401 least one of them, and are therefore diamond shaped. */
12402 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12404 /* Unmark all the types. */
12405 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12406 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12407 TYPE_MARKED_P (ref
) = 0;
12409 /* Now see if we have a repeated base type. */
12410 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12412 for (base_binfo
= binfo
; base_binfo
;
12413 base_binfo
= TREE_CHAIN (base_binfo
))
12415 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12417 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12420 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12422 for (base_binfo
= binfo
; base_binfo
;
12423 base_binfo
= TREE_CHAIN (base_binfo
))
12424 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12425 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12434 /* Copies the enum-related properties from type SRC to type DST.
12435 Used with the underlying type of an enum and the enum itself. */
12437 copy_type_enum (tree dst
, tree src
)
12440 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12442 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12443 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12444 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12445 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12446 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12447 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12448 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12449 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12450 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12454 /* Begin compiling the definition of an enumeration type.
12457 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12459 UNDERLYING_TYPE is the type that will be used as the storage for
12460 the enumeration type. This should be NULL_TREE if no storage type
12463 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12465 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12467 Returns the type object, as yet incomplete.
12468 Also records info about it so that build_enumerator
12469 may be used to declare the individual values as they are read. */
12472 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12473 bool scoped_enum_p
, bool *is_new
)
12475 tree prevtype
= NULL_TREE
;
12476 gcc_assert (identifier_p (name
));
12480 /* [C++0x dcl.enum]p5:
12482 If not explicitly specified, the underlying type of a scoped
12483 enumeration type is int. */
12484 if (!underlying_type
&& scoped_enum_p
)
12485 underlying_type
= integer_type_node
;
12487 if (underlying_type
)
12488 underlying_type
= cv_unqualified (underlying_type
);
12490 /* If this is the real definition for a previous forward reference,
12491 fill in the contents in the same object that used to be the
12492 forward reference. */
12494 enumtype
= lookup_and_check_tag (enum_type
, name
,
12495 /*tag_scope=*/ts_current
,
12496 /*template_header_p=*/false);
12498 /* In case of a template_decl, the only check that should be deferred
12499 to instantiation time is the comparison of underlying types. */
12500 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12502 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12504 error_at (input_location
, "scoped/unscoped mismatch "
12505 "in enum %q#T", enumtype
);
12506 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12507 "previous definition here");
12508 enumtype
= error_mark_node
;
12510 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12512 error_at (input_location
, "underlying type mismatch "
12513 "in enum %q#T", enumtype
);
12514 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12515 "previous definition here");
12516 enumtype
= error_mark_node
;
12518 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12519 && !dependent_type_p (underlying_type
)
12520 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12521 && !same_type_p (underlying_type
,
12522 ENUM_UNDERLYING_TYPE (enumtype
)))
12524 error_at (input_location
, "different underlying type "
12525 "in enum %q#T", enumtype
);
12526 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12527 "previous definition here");
12528 underlying_type
= NULL_TREE
;
12532 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12533 || processing_template_decl
)
12535 /* In case of error, make a dummy enum to allow parsing to
12537 if (enumtype
== error_mark_node
)
12539 name
= make_anon_name ();
12540 enumtype
= NULL_TREE
;
12543 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12544 of an opaque enum, or an opaque enum of an already defined
12545 enumeration (C++0x only).
12546 In any other case, it'll be NULL_TREE. */
12552 prevtype
= enumtype
;
12554 /* Do not push the decl more than once, unless we need to
12555 compare underlying types at instantiation time */
12557 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12558 || (underlying_type
12559 && dependent_type_p (underlying_type
))
12560 || (ENUM_UNDERLYING_TYPE (enumtype
)
12561 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12563 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12564 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12567 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12570 if (enumtype
== error_mark_node
)
12571 return error_mark_node
;
12573 /* The enum is considered opaque until the opening '{' of the
12574 enumerator list. */
12575 SET_OPAQUE_ENUM_P (enumtype
, true);
12576 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12579 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12581 if (underlying_type
)
12583 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12585 copy_type_enum (enumtype
, underlying_type
);
12586 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12588 else if (dependent_type_p (underlying_type
))
12589 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12591 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12592 underlying_type
, enumtype
);
12595 /* If into a template class, the returned enum is always the first
12596 declaration (opaque or not) seen. This way all the references to
12597 this type will be to the same declaration. The following ones are used
12598 only to check for definition errors. */
12599 if (prevtype
&& processing_template_decl
)
12605 /* After processing and defining all the values of an enumeration type,
12606 install their decls in the enumeration type.
12607 ENUMTYPE is the type object. */
12610 finish_enum_value_list (tree enumtype
)
12613 tree underlying_type
;
12616 tree minnode
, maxnode
;
12619 bool fixed_underlying_type_p
12620 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12622 /* We built up the VALUES in reverse order. */
12623 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12625 /* For an enum defined in a template, just set the type of the values;
12626 all further processing is postponed until the template is
12627 instantiated. We need to set the type so that tsubst of a CONST_DECL
12629 if (processing_template_decl
)
12631 for (values
= TYPE_VALUES (enumtype
);
12633 values
= TREE_CHAIN (values
))
12634 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12638 /* Determine the minimum and maximum values of the enumerators. */
12639 if (TYPE_VALUES (enumtype
))
12641 minnode
= maxnode
= NULL_TREE
;
12643 for (values
= TYPE_VALUES (enumtype
);
12645 values
= TREE_CHAIN (values
))
12647 decl
= TREE_VALUE (values
);
12649 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12650 each enumerator has the type of its enumeration. Prior to the
12651 closing brace, the type of each enumerator is the type of its
12652 initializing value. */
12653 TREE_TYPE (decl
) = enumtype
;
12655 /* Update the minimum and maximum values, if appropriate. */
12656 value
= DECL_INITIAL (decl
);
12657 if (value
== error_mark_node
)
12658 value
= integer_zero_node
;
12659 /* Figure out what the minimum and maximum values of the
12660 enumerators are. */
12662 minnode
= maxnode
= value
;
12663 else if (tree_int_cst_lt (maxnode
, value
))
12665 else if (tree_int_cst_lt (value
, minnode
))
12672 If the enumerator-list is empty, the underlying type is as if
12673 the enumeration had a single enumerator with value 0. */
12674 minnode
= maxnode
= integer_zero_node
;
12676 if (!fixed_underlying_type_p
)
12678 /* Compute the number of bits require to represent all values of the
12679 enumeration. We must do this before the type of MINNODE and
12680 MAXNODE are transformed, since tree_int_cst_min_precision relies
12681 on the TREE_TYPE of the value it is passed. */
12682 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12683 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12684 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12685 int precision
= MAX (lowprec
, highprec
);
12687 bool use_short_enum
;
12689 /* Determine the underlying type of the enumeration.
12693 The underlying type of an enumeration is an integral type that
12694 can represent all the enumerator values defined in the
12695 enumeration. It is implementation-defined which integral type is
12696 used as the underlying type for an enumeration except that the
12697 underlying type shall not be larger than int unless the value of
12698 an enumerator cannot fit in an int or unsigned int.
12700 We use "int" or an "unsigned int" as the underlying type, even if
12701 a smaller integral type would work, unless the user has
12702 explicitly requested that we use the smallest possible type. The
12703 user can request that for all enumerations with a command line
12704 flag, or for just one enumeration with an attribute. */
12706 use_short_enum
= flag_short_enums
12707 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12709 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12713 underlying_type
= integer_types
[itk
];
12714 if (underlying_type
!= NULL_TREE
12715 && TYPE_PRECISION (underlying_type
) >= precision
12716 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12719 if (itk
== itk_none
)
12723 IF no integral type can represent all the enumerator values, the
12724 enumeration is ill-formed. */
12725 error ("no integral type can represent all of the enumerator values "
12726 "for %qT", enumtype
);
12727 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12728 underlying_type
= integer_types
[itk_unsigned_long_long
];
12733 The value of sizeof() applied to an enumeration type, an object
12734 of an enumeration type, or an enumerator, is the value of sizeof()
12735 applied to the underlying type. */
12736 copy_type_enum (enumtype
, underlying_type
);
12738 /* Compute the minimum and maximum values for the type.
12742 For an enumeration where emin is the smallest enumerator and emax
12743 is the largest, the values of the enumeration are the values of the
12744 underlying type in the range bmin to bmax, where bmin and bmax are,
12745 respectively, the smallest and largest values of the smallest bit-
12746 field that can store emin and emax. */
12748 /* The middle-end currently assumes that types with TYPE_PRECISION
12749 narrower than their underlying type are suitably zero or sign
12750 extended to fill their mode. Similarly, it assumes that the front
12751 end assures that a value of a particular type must be within
12752 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12754 We used to set these fields based on bmin and bmax, but that led
12755 to invalid assumptions like optimizing away bounds checking. So
12756 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12757 TYPE_MAX_VALUE to the values for the mode above and only restrict
12758 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12759 ENUM_UNDERLYING_TYPE (enumtype
)
12760 = build_distinct_type_copy (underlying_type
);
12761 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12762 set_min_and_max_values_for_integral_type
12763 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12765 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12766 if (flag_strict_enums
)
12767 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12771 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12773 /* Convert each of the enumerators to the type of the underlying
12774 type of the enumeration. */
12775 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12777 location_t saved_location
;
12779 decl
= TREE_VALUE (values
);
12780 saved_location
= input_location
;
12781 input_location
= DECL_SOURCE_LOCATION (decl
);
12782 if (fixed_underlying_type_p
)
12783 /* If the enumeration type has a fixed underlying type, we
12784 already checked all of the enumerator values. */
12785 value
= DECL_INITIAL (decl
);
12787 value
= perform_implicit_conversion (underlying_type
,
12788 DECL_INITIAL (decl
),
12789 tf_warning_or_error
);
12790 input_location
= saved_location
;
12792 /* Do not clobber shared ints. */
12793 value
= copy_node (value
);
12795 TREE_TYPE (value
) = enumtype
;
12796 DECL_INITIAL (decl
) = value
;
12799 /* Fix up all variant types of this enum type. */
12800 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12801 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12803 if (at_class_scope_p ()
12804 && COMPLETE_TYPE_P (current_class_type
)
12805 && UNSCOPED_ENUM_P (enumtype
))
12806 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12807 current_class_type
);
12809 /* Finish debugging output for this type. */
12810 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12813 /* Finishes the enum type. This is called only the first time an
12814 enumeration is seen, be it opaque or odinary.
12815 ENUMTYPE is the type object. */
12818 finish_enum (tree enumtype
)
12820 if (processing_template_decl
)
12822 if (at_function_scope_p ())
12823 add_stmt (build_min (TAG_DEFN
, enumtype
));
12827 /* If this is a forward declaration, there should not be any variants,
12828 though we can get a variant in the middle of an enum-specifier with
12829 wacky code like 'enum E { e = sizeof(const E*) };' */
12830 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12831 && (TYPE_VALUES (enumtype
)
12832 || !TYPE_NEXT_VARIANT (enumtype
)));
12835 /* Build and install a CONST_DECL for an enumeration constant of the
12836 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12837 LOC is the location of NAME.
12838 Assignment of sequential values by default is handled here. */
12841 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12847 /* If the VALUE was erroneous, pretend it wasn't there; that will
12848 result in the enum being assigned the next value in sequence. */
12849 if (value
== error_mark_node
)
12852 /* Remove no-op casts from the value. */
12854 STRIP_TYPE_NOPS (value
);
12856 if (! processing_template_decl
)
12858 /* Validate and default VALUE. */
12859 if (value
!= NULL_TREE
)
12861 value
= cxx_constant_value (value
);
12863 if (TREE_CODE (value
) != INTEGER_CST
12864 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12866 error ("enumerator value for %qD is not an integer constant",
12872 /* Default based on previous value. */
12873 if (value
== NULL_TREE
)
12875 if (TYPE_VALUES (enumtype
))
12880 /* C++03 7.2/4: If no initializer is specified for the first
12881 enumerator, the type is an unspecified integral
12882 type. Otherwise the type is the same as the type of the
12883 initializing value of the preceding enumerator unless the
12884 incremented value is not representable in that type, in
12885 which case the type is an unspecified integral type
12886 sufficient to contain the incremented value. */
12887 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12888 if (error_operand_p (prev_value
))
12889 value
= error_mark_node
;
12892 double_int di
= TREE_INT_CST (prev_value
)
12893 .add_with_sign (double_int_one
,
12894 false, &overflowed
);
12897 tree type
= TREE_TYPE (prev_value
);
12898 bool pos
= TYPE_UNSIGNED (type
) || !di
.is_negative ();
12899 if (!double_int_fits_to_tree_p (type
, di
))
12902 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12904 type
= integer_types
[itk
];
12905 if (type
!= NULL_TREE
12906 && (pos
|| !TYPE_UNSIGNED (type
))
12907 && double_int_fits_to_tree_p (type
, di
))
12910 if (type
&& cxx_dialect
< cxx11
12911 && itk
> itk_unsigned_long
)
12912 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12913 incremented enumerator value is too large for %<unsigned long%>" : "\
12914 incremented enumerator value is too large for %<long%>");
12916 if (type
== NULL_TREE
)
12919 value
= double_int_to_tree (type
, di
);
12924 error ("overflow in enumeration values at %qD", name
);
12925 value
= error_mark_node
;
12930 value
= integer_zero_node
;
12933 /* Remove no-op casts from the value. */
12934 STRIP_TYPE_NOPS (value
);
12936 /* If the underlying type of the enum is fixed, check whether
12937 the enumerator values fits in the underlying type. If it
12938 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12939 if (ENUM_UNDERLYING_TYPE (enumtype
)
12941 && TREE_CODE (value
) == INTEGER_CST
)
12943 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12944 error ("enumerator value %E is outside the range of underlying "
12945 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
12947 /* Convert the value to the appropriate type. */
12948 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
12952 /* C++ associates enums with global, function, or class declarations. */
12953 context
= current_scope ();
12955 /* Build the actual enumeration constant. Note that the enumeration
12956 constants have the underlying type of the enum (if it is fixed)
12957 or the type of their initializer (if the underlying type of the
12958 enum is not fixed):
12962 If the underlying type is fixed, the type of each enumerator
12963 prior to the closing brace is the underlying type; if the
12964 initializing value of an enumerator cannot be represented by
12965 the underlying type, the program is ill-formed. If the
12966 underlying type is not fixed, the type of each enumerator is
12967 the type of its initializing value.
12969 If the underlying type is not fixed, it will be computed by
12970 finish_enum and we will reset the type of this enumerator. Of
12971 course, if we're processing a template, there may be no value. */
12972 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12974 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12976 DECL_CONTEXT (decl
) = enumtype
;
12977 TREE_CONSTANT (decl
) = 1;
12978 TREE_READONLY (decl
) = 1;
12979 DECL_INITIAL (decl
) = value
;
12981 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12982 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12983 on the TYPE_FIELDS list for `S'. (That's so that you can say
12984 things like `S::i' later.) */
12985 finish_member_declaration (decl
);
12989 /* Add this enumeration constant to the list for this type. */
12990 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12993 /* Look for an enumerator with the given NAME within the enumeration
12994 type ENUMTYPE. This routine is used primarily for qualified name
12995 lookup into an enumerator in C++0x, e.g.,
12997 enum class Color { Red, Green, Blue };
12999 Color color = Color::Red;
13001 Returns the value corresponding to the enumerator, or
13002 NULL_TREE if no such enumerator was found. */
13004 lookup_enumerator (tree enumtype
, tree name
)
13007 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13009 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13010 return e
? TREE_VALUE (e
) : NULL_TREE
;
13014 /* We're defining DECL. Make sure that its type is OK. */
13017 check_function_type (tree decl
, tree current_function_parms
)
13019 tree fntype
= TREE_TYPE (decl
);
13020 tree return_type
= complete_type (TREE_TYPE (fntype
));
13022 /* In a function definition, arg types must be complete. */
13023 require_complete_types_for_parms (current_function_parms
);
13025 if (dependent_type_p (return_type
)
13026 || type_uses_auto (return_type
))
13028 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13029 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13031 tree args
= TYPE_ARG_TYPES (fntype
);
13033 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13034 error ("return type %q#T is incomplete", return_type
);
13036 error ("return type has Java class type %q#T", return_type
);
13038 /* Make it return void instead. */
13039 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13040 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13042 TREE_CHAIN (args
));
13044 fntype
= build_function_type (void_type_node
, args
);
13046 = build_exception_variant (fntype
,
13047 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13048 fntype
= (cp_build_type_attribute_variant
13049 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13050 TREE_TYPE (decl
) = fntype
;
13053 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13056 /* Create the FUNCTION_DECL for a function definition.
13057 DECLSPECS and DECLARATOR are the parts of the declaration;
13058 they describe the function's name and the type it returns,
13059 but twisted together in a fashion that parallels the syntax of C.
13061 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13062 DECLARATOR is really the DECL for the function we are about to
13063 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13064 indicating that the function is an inline defined in-class.
13066 This function creates a binding context for the function body
13067 as well as setting up the FUNCTION_DECL in current_function_decl.
13069 For C++, we must first check whether that datum makes any sense.
13070 For example, "class A local_a(1,2);" means that variable local_a
13071 is an aggregate of type A, which should have a constructor
13072 applied to it with the argument list [1, 2].
13074 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13075 or may be a BLOCK if the function has been defined previously
13076 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13077 error_mark_node if the function has never been defined, or
13078 a BLOCK if the function has been defined somewhere. */
13081 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13083 tree ctype
= NULL_TREE
;
13086 int doing_friend
= 0;
13087 cp_binding_level
*bl
;
13088 tree current_function_parms
;
13089 struct c_fileinfo
*finfo
13090 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13091 bool honor_interface
;
13093 /* Sanity check. */
13094 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13095 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13097 fntype
= TREE_TYPE (decl1
);
13098 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13099 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13101 /* ISO C++ 11.4/5. A friend function defined in a class is in
13102 the (lexical) scope of the class in which it is defined. */
13103 if (!ctype
&& DECL_FRIEND_P (decl1
))
13105 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13107 /* CTYPE could be null here if we're dealing with a template;
13108 for example, `inline friend float foo()' inside a template
13109 will have no CTYPE set. */
13110 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13116 if (DECL_DECLARED_INLINE_P (decl1
)
13117 && lookup_attribute ("noinline", attrs
))
13118 warning (0, "inline function %q+D given attribute noinline", decl1
);
13120 /* Handle gnu_inline attribute. */
13121 if (GNU_INLINE_P (decl1
))
13123 DECL_EXTERNAL (decl1
) = 1;
13124 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13125 DECL_INTERFACE_KNOWN (decl1
) = 1;
13126 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13129 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13130 /* This is a constructor, we must ensure that any default args
13131 introduced by this definition are propagated to the clones
13132 now. The clones are used directly in overload resolution. */
13133 adjust_clone_args (decl1
);
13135 /* Sometimes we don't notice that a function is a static member, and
13136 build a METHOD_TYPE for it. Fix that up now. */
13137 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13138 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13140 /* Set up current_class_type, and enter the scope of the class, if
13143 push_nested_class (ctype
);
13144 else if (DECL_STATIC_FUNCTION_P (decl1
))
13145 push_nested_class (DECL_CONTEXT (decl1
));
13147 /* Now that we have entered the scope of the class, we must restore
13148 the bindings for any template parameters surrounding DECL1, if it
13149 is an inline member template. (Order is important; consider the
13150 case where a template parameter has the same name as a field of
13151 the class.) It is not until after this point that
13152 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13153 if (flags
& SF_INCLASS_INLINE
)
13154 maybe_begin_member_template_processing (decl1
);
13156 /* Effective C++ rule 15. */
13158 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13159 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13160 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13162 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13163 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13164 if (!DECL_INITIAL (decl1
))
13165 DECL_INITIAL (decl1
) = error_mark_node
;
13167 /* This function exists in static storage.
13168 (This does not mean `static' in the C sense!) */
13169 TREE_STATIC (decl1
) = 1;
13171 /* We must call push_template_decl after current_class_type is set
13172 up. (If we are processing inline definitions after exiting a
13173 class scope, current_class_type will be NULL_TREE until set above
13174 by push_nested_class.) */
13175 if (processing_template_decl
)
13177 tree newdecl1
= push_template_decl (decl1
);
13178 if (newdecl1
== error_mark_node
)
13180 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13181 pop_nested_class ();
13187 /* We are now in the scope of the function being defined. */
13188 current_function_decl
= decl1
;
13190 /* Save the parm names or decls from this function's declarator
13191 where store_parm_decls will find them. */
13192 current_function_parms
= DECL_ARGUMENTS (decl1
);
13194 /* Make sure the parameter and return types are reasonable. When
13195 you declare a function, these types can be incomplete, but they
13196 must be complete when you define the function. */
13197 check_function_type (decl1
, current_function_parms
);
13199 /* Build the return declaration for the function. */
13200 restype
= TREE_TYPE (fntype
);
13202 if (DECL_RESULT (decl1
) == NULL_TREE
)
13206 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13207 DECL_ARTIFICIAL (resdecl
) = 1;
13208 DECL_IGNORED_P (resdecl
) = 1;
13209 DECL_RESULT (decl1
) = resdecl
;
13211 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13214 /* Let the user know we're compiling this function. */
13215 announce_function (decl1
);
13217 /* Record the decl so that the function name is defined.
13218 If we already have a decl for this name, and it is a FUNCTION_DECL,
13219 use the old decl. */
13220 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13222 /* A specialization is not used to guide overload resolution. */
13223 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13224 && !(DECL_USE_TEMPLATE (decl1
) &&
13225 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13227 tree olddecl
= pushdecl (decl1
);
13229 if (olddecl
== error_mark_node
)
13230 /* If something went wrong when registering the declaration,
13231 use DECL1; we have to have a FUNCTION_DECL to use when
13232 parsing the body of the function. */
13236 /* Otherwise, OLDDECL is either a previous declaration
13237 of the same function or DECL1 itself. */
13239 if (warn_missing_declarations
13240 && olddecl
== decl1
13241 && !DECL_MAIN_P (decl1
)
13242 && TREE_PUBLIC (decl1
)
13243 && !DECL_DECLARED_INLINE_P (decl1
))
13247 /* Check whether DECL1 is in an anonymous
13249 for (context
= DECL_CONTEXT (decl1
);
13251 context
= DECL_CONTEXT (context
))
13253 if (TREE_CODE (context
) == NAMESPACE_DECL
13254 && DECL_NAME (context
) == NULL_TREE
)
13258 if (context
== NULL
)
13259 warning (OPT_Wmissing_declarations
,
13260 "no previous declaration for %q+D", decl1
);
13268 /* We need to set the DECL_CONTEXT. */
13269 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13270 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13272 fntype
= TREE_TYPE (decl1
);
13273 restype
= TREE_TYPE (fntype
);
13275 /* If #pragma weak applies, mark the decl appropriately now.
13276 The pragma only applies to global functions. Because
13277 determining whether or not the #pragma applies involves
13278 computing the mangled name for the declaration, we cannot
13279 apply the pragma until after we have merged this declaration
13280 with any previous declarations; if the original declaration
13281 has a linkage specification, that specification applies to
13282 the definition as well, and may affect the mangled name. */
13283 if (DECL_FILE_SCOPE_P (decl1
))
13284 maybe_apply_pragma_weak (decl1
);
13287 /* Reset this in case the call to pushdecl changed it. */
13288 current_function_decl
= decl1
;
13290 gcc_assert (DECL_INITIAL (decl1
));
13292 /* This function may already have been parsed, in which case just
13293 return; our caller will skip over the body without parsing. */
13294 if (DECL_INITIAL (decl1
) != error_mark_node
)
13297 /* Initialize RTL machinery. We cannot do this until
13298 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13299 even when processing a template; this is how we get
13300 CFUN set up, and our per-function variables initialized.
13301 FIXME factor out the non-RTL stuff. */
13302 bl
= current_binding_level
;
13303 allocate_struct_function (decl1
, processing_template_decl
);
13305 /* Initialize the language data structures. Whenever we start
13306 a new function, we destroy temporaries in the usual way. */
13307 cfun
->language
= ggc_alloc_cleared_language_function ();
13308 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13309 current_binding_level
= bl
;
13311 if (!processing_template_decl
&& type_uses_auto (restype
))
13313 FNDECL_USED_AUTO (decl1
) = true;
13314 current_function_auto_return_pattern
= restype
;
13317 /* Start the statement-tree, start the tree now. */
13318 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13320 /* If we are (erroneously) defining a function that we have already
13321 defined before, wipe out what we knew before. */
13322 if (!DECL_PENDING_INLINE_P (decl1
))
13323 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13325 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13327 /* We know that this was set up by `grokclassfn'. We do not
13328 wait until `store_parm_decls', since evil parse errors may
13329 never get us to that point. Here we keep the consistency
13330 between `current_class_type' and `current_class_ptr'. */
13331 tree t
= DECL_ARGUMENTS (decl1
);
13333 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13334 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13336 cp_function_chain
->x_current_class_ref
13337 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13338 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13339 cp_function_chain
->x_current_class_ptr
= t
;
13341 /* Constructors and destructors need to know whether they're "in
13342 charge" of initializing virtual base classes. */
13343 t
= DECL_CHAIN (t
);
13344 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13346 current_in_charge_parm
= t
;
13347 t
= DECL_CHAIN (t
);
13349 if (DECL_HAS_VTT_PARM_P (decl1
))
13351 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13352 current_vtt_parm
= t
;
13356 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13357 /* Implicitly-defined methods (like the
13358 destructor for a class in which no destructor
13359 is explicitly declared) must not be defined
13360 until their definition is needed. So, we
13361 ignore interface specifications for
13362 compiler-generated functions. */
13363 && !DECL_ARTIFICIAL (decl1
));
13365 if (processing_template_decl
)
13366 /* Don't mess with interface flags. */;
13367 else if (DECL_INTERFACE_KNOWN (decl1
))
13369 tree ctx
= decl_function_context (decl1
);
13371 if (DECL_NOT_REALLY_EXTERN (decl1
))
13372 DECL_EXTERNAL (decl1
) = 0;
13374 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13375 /* This is a function in a local class in an extern inline
13376 or template function. */
13377 comdat_linkage (decl1
);
13379 /* If this function belongs to an interface, it is public.
13380 If it belongs to someone else's interface, it is also external.
13381 This only affects inlines and template instantiations. */
13382 else if (!finfo
->interface_unknown
&& honor_interface
)
13384 if (DECL_DECLARED_INLINE_P (decl1
)
13385 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13387 DECL_EXTERNAL (decl1
)
13388 = (finfo
->interface_only
13389 || (DECL_DECLARED_INLINE_P (decl1
)
13390 && ! flag_implement_inlines
13391 && !DECL_VINDEX (decl1
)));
13393 /* For WIN32 we also want to put these in linkonce sections. */
13394 maybe_make_one_only (decl1
);
13397 DECL_EXTERNAL (decl1
) = 0;
13398 DECL_INTERFACE_KNOWN (decl1
) = 1;
13399 /* If this function is in an interface implemented in this file,
13400 make sure that the back end knows to emit this function
13402 if (!DECL_EXTERNAL (decl1
))
13403 mark_needed (decl1
);
13405 else if (finfo
->interface_unknown
&& finfo
->interface_only
13406 && honor_interface
)
13408 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13409 interface, we will have both finfo->interface_unknown and
13410 finfo->interface_only set. In that case, we don't want to
13411 use the normal heuristics because someone will supply a
13412 #pragma implementation elsewhere, and deducing it here would
13413 produce a conflict. */
13414 comdat_linkage (decl1
);
13415 DECL_EXTERNAL (decl1
) = 0;
13416 DECL_INTERFACE_KNOWN (decl1
) = 1;
13417 DECL_DEFER_OUTPUT (decl1
) = 1;
13421 /* This is a definition, not a reference.
13422 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13423 if (!GNU_INLINE_P (decl1
))
13424 DECL_EXTERNAL (decl1
) = 0;
13426 if ((DECL_DECLARED_INLINE_P (decl1
)
13427 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13428 && ! DECL_INTERFACE_KNOWN (decl1
))
13429 DECL_DEFER_OUTPUT (decl1
) = 1;
13431 DECL_INTERFACE_KNOWN (decl1
) = 1;
13434 /* Determine the ELF visibility attribute for the function. We must not
13435 do this before calling "pushdecl", as we must allow "duplicate_decls"
13436 to merge any attributes appropriately. We also need to wait until
13438 if (!DECL_CLONED_FUNCTION_P (decl1
))
13439 determine_visibility (decl1
);
13441 begin_scope (sk_function_parms
, decl1
);
13445 if (DECL_DESTRUCTOR_P (decl1
)
13446 || (DECL_CONSTRUCTOR_P (decl1
)
13447 && targetm
.cxx
.cdtor_returns_this ()))
13449 cdtor_label
= build_decl (input_location
,
13450 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13451 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13454 start_fname_decls ();
13456 store_parm_decls (current_function_parms
);
13462 /* Like start_preparsed_function, except that instead of a
13463 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13465 Returns true on success. If the DECLARATOR is not suitable
13466 for a function, we return false, which tells the parser to
13467 skip the entire function. */
13470 start_function (cp_decl_specifier_seq
*declspecs
,
13471 const cp_declarator
*declarator
,
13476 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13477 if (decl1
== error_mark_node
)
13479 /* If the declarator is not suitable for a function definition,
13480 cause a syntax error. */
13481 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13483 error ("invalid function declaration");
13487 if (DECL_MAIN_P (decl1
))
13488 /* main must return int. grokfndecl should have corrected it
13489 (and issued a diagnostic) if the user got it wrong. */
13490 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13491 integer_type_node
));
13493 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13496 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13500 use_eh_spec_block (tree fn
)
13502 return (flag_exceptions
&& flag_enforce_eh_specs
13503 && !processing_template_decl
13504 && !type_throw_all_p (TREE_TYPE (fn
))
13505 /* We insert the EH_SPEC_BLOCK only in the original
13506 function; then, it is copied automatically to the
13508 && !DECL_CLONED_FUNCTION_P (fn
)
13509 /* Implicitly-generated constructors and destructors have
13510 exception specifications. However, those specifications
13511 are the union of the possible exceptions specified by the
13512 constructors/destructors for bases and members, so no
13513 unallowed exception will ever reach this function. By
13514 not creating the EH_SPEC_BLOCK we save a little memory,
13515 and we avoid spurious warnings about unreachable
13517 && !DECL_DEFAULTED_FN (fn
));
13520 /* Store the parameter declarations into the current function declaration.
13521 This is called after parsing the parameter declarations, before
13522 digesting the body of the function.
13524 Also install to binding contour return value identifier, if any. */
13527 store_parm_decls (tree current_function_parms
)
13529 tree fndecl
= current_function_decl
;
13532 /* This is a chain of any other decls that came in among the parm
13533 declarations. If a parm is declared with enum {foo, bar} x;
13534 then CONST_DECLs for foo and bar are put here. */
13535 tree nonparms
= NULL_TREE
;
13537 if (current_function_parms
)
13539 /* This case is when the function was defined with an ANSI prototype.
13540 The parms already have decls, so we need not do anything here
13541 except record them as in effect
13542 and complain if any redundant old-style parm decls were written. */
13544 tree specparms
= current_function_parms
;
13547 /* Must clear this because it might contain TYPE_DECLs declared
13549 current_binding_level
->names
= NULL
;
13551 /* If we're doing semantic analysis, then we'll call pushdecl
13552 for each of these. We must do them in reverse order so that
13553 they end in the correct forward order. */
13554 specparms
= nreverse (specparms
);
13556 for (parm
= specparms
; parm
; parm
= next
)
13558 next
= DECL_CHAIN (parm
);
13559 if (TREE_CODE (parm
) == PARM_DECL
)
13561 if (DECL_NAME (parm
) == NULL_TREE
13562 || !VOID_TYPE_P (parm
))
13565 error ("parameter %qD declared void", parm
);
13569 /* If we find an enum constant or a type tag,
13570 put it aside for the moment. */
13571 TREE_CHAIN (parm
) = NULL_TREE
;
13572 nonparms
= chainon (nonparms
, parm
);
13576 /* Get the decls in their original chain order and record in the
13577 function. This is all and only the PARM_DECLs that were
13578 pushed into scope by the loop above. */
13579 DECL_ARGUMENTS (fndecl
) = getdecls ();
13582 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13584 /* Now store the final chain of decls for the arguments
13585 as the decl-chain of the current lexical scope.
13586 Put the enumerators in as well, at the front so that
13587 DECL_ARGUMENTS is not modified. */
13588 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13590 if (use_eh_spec_block (current_function_decl
))
13591 current_eh_spec_block
= begin_eh_spec_block ();
13595 /* We have finished doing semantic analysis on DECL, but have not yet
13596 generated RTL for its body. Save away our current state, so that
13597 when we want to generate RTL later we know what to do. */
13600 save_function_data (tree decl
)
13602 struct language_function
*f
;
13604 /* Save the language-specific per-function data so that we can
13605 get it back when we really expand this function. */
13606 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13609 f
= ggc_alloc_language_function ();
13610 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13611 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13613 /* Clear out the bits we don't need. */
13614 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13615 f
->bindings
= NULL
;
13616 f
->x_local_names
= NULL
;
13617 f
->base
.local_typedefs
= NULL
;
13621 /* Set the return value of the constructor (if present). */
13624 finish_constructor_body (void)
13629 if (targetm
.cxx
.cdtor_returns_this ()
13630 && (! TYPE_FOR_JAVA (current_class_type
)))
13632 /* Any return from a constructor will end up here. */
13633 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13635 val
= DECL_ARGUMENTS (current_function_decl
);
13636 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13637 DECL_RESULT (current_function_decl
), val
);
13638 /* Return the address of the object. */
13639 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13640 add_stmt (exprstmt
);
13644 /* Do all the processing for the beginning of a destructor; set up the
13645 vtable pointers and cleanups for bases and members. */
13648 begin_destructor_body (void)
13650 tree compound_stmt
;
13652 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13653 issued an error message. We still want to try to process the
13654 body of the function, but initialize_vtbl_ptrs will crash if
13655 TYPE_BINFO is NULL. */
13656 if (COMPLETE_TYPE_P (current_class_type
))
13658 compound_stmt
= begin_compound_stmt (0);
13659 /* Make all virtual function table pointers in non-virtual base
13660 classes point to CURRENT_CLASS_TYPE's virtual function
13662 initialize_vtbl_ptrs (current_class_ptr
);
13663 finish_compound_stmt (compound_stmt
);
13665 /* Insert a cleanup to let the back end know that the object is dead
13666 when we exit the destructor, either normally or via exception. */
13667 tree clobber
= build_constructor (current_class_type
, NULL
);
13668 TREE_THIS_VOLATILE (clobber
) = true;
13669 tree exprstmt
= build2 (MODIFY_EXPR
, current_class_type
,
13670 current_class_ref
, clobber
);
13671 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13673 /* And insert cleanups for our bases and members so that they
13674 will be properly destroyed if we throw. */
13675 push_base_cleanups ();
13679 /* At the end of every destructor we generate code to delete the object if
13680 necessary. Do that now. */
13683 finish_destructor_body (void)
13687 /* Any return from a destructor will end up here; that way all base
13688 and member cleanups will be run when the function returns. */
13689 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13691 /* In a virtual destructor, we must call delete. */
13692 if (DECL_VIRTUAL_P (current_function_decl
))
13695 tree virtual_size
= cxx_sizeof (current_class_type
);
13699 At the point of definition of a virtual destructor (including
13700 an implicit definition), non-placement operator delete shall
13701 be looked up in the scope of the destructor's class and if
13702 found shall be accessible and unambiguous. */
13703 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13705 /*global_p=*/false,
13706 /*placement=*/NULL_TREE
,
13707 /*alloc_fn=*/NULL_TREE
,
13708 tf_warning_or_error
);
13710 if_stmt
= begin_if_stmt ();
13711 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13712 current_in_charge_parm
,
13715 finish_expr_stmt (exprstmt
);
13716 finish_then_clause (if_stmt
);
13717 finish_if_stmt (if_stmt
);
13720 if (targetm
.cxx
.cdtor_returns_this ())
13724 val
= DECL_ARGUMENTS (current_function_decl
);
13725 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13726 DECL_RESULT (current_function_decl
), val
);
13727 /* Return the address of the object. */
13728 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13729 add_stmt (exprstmt
);
13733 /* Do the necessary processing for the beginning of a function body, which
13734 in this case includes member-initializers, but not the catch clauses of
13735 a function-try-block. Currently, this means opening a binding level
13736 for the member-initializers (in a ctor), member cleanups (in a dtor),
13737 and capture proxies (in a lambda operator()). */
13740 begin_function_body (void)
13744 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13747 if (processing_template_decl
)
13748 /* Do nothing now. */;
13750 /* Always keep the BLOCK node associated with the outermost pair of
13751 curly braces of a function. These are needed for correct
13752 operation of dwarfout.c. */
13753 keep_next_level (true);
13755 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13757 if (processing_template_decl
)
13758 /* Do nothing now. */;
13759 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13760 begin_destructor_body ();
13765 /* Do the processing for the end of a function body. Currently, this means
13766 closing out the cleanups for fully-constructed bases and members, and in
13767 the case of the destructor, deleting the object if desired. Again, this
13768 is only meaningful for [cd]tors, since they are the only functions where
13769 there is a significant distinction between the main body and any
13770 function catch clauses. Handling, say, main() return semantics here
13771 would be wrong, as flowing off the end of a function catch clause for
13772 main() would also need to return 0. */
13775 finish_function_body (tree compstmt
)
13777 if (compstmt
== NULL_TREE
)
13780 /* Close the block. */
13781 finish_compound_stmt (compstmt
);
13783 if (processing_template_decl
)
13784 /* Do nothing now. */;
13785 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13786 finish_constructor_body ();
13787 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13788 finish_destructor_body ();
13791 /* Given a function, returns the BLOCK corresponding to the outermost level
13792 of curly braces, skipping the artificial block created for constructor
13796 outer_curly_brace_block (tree fndecl
)
13798 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13799 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13800 /* Skip the artificial function body block. */
13801 block
= BLOCK_SUBBLOCKS (block
);
13805 /* If FNDECL is a class's key method, add the class to the list of
13806 keyed classes that should be emitted. */
13809 record_key_method_defined (tree fndecl
)
13811 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13812 && DECL_VIRTUAL_P (fndecl
)
13813 && !processing_template_decl
)
13815 tree fnclass
= DECL_CONTEXT (fndecl
);
13816 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13817 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13821 /* Subroutine of finish_function.
13822 Save the body of constexpr functions for possible
13823 future compile time evaluation. */
13826 maybe_save_function_definition (tree fun
)
13828 if (!processing_template_decl
13829 && DECL_DECLARED_CONSTEXPR_P (fun
)
13830 && !DECL_CLONED_FUNCTION_P (fun
))
13831 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13834 /* Finish up a function declaration and compile that function
13835 all the way to assembler language output. The free the storage
13836 for the function definition.
13838 FLAGS is a bitwise or of the following values:
13840 We just finished processing the body of an in-class inline
13841 function definition. (This processing will have taken place
13842 after the class definition is complete.) */
13845 finish_function (int flags
)
13847 tree fndecl
= current_function_decl
;
13848 tree fntype
, ctype
= NULL_TREE
;
13849 int inclass_inline
= (flags
& 2) != 0;
13851 /* When we get some parse errors, we can end up without a
13852 current_function_decl, so cope. */
13853 if (fndecl
== NULL_TREE
)
13854 return error_mark_node
;
13856 if (c_dialect_objc ())
13857 objc_finish_function ();
13859 gcc_assert (!defer_mark_used_calls
);
13860 defer_mark_used_calls
= true;
13862 record_key_method_defined (fndecl
);
13864 fntype
= TREE_TYPE (fndecl
);
13866 /* TREE_READONLY (fndecl) = 1;
13867 This caused &foo to be of type ptr-to-const-function
13868 which then got a warning when stored in a ptr-to-function variable. */
13870 gcc_assert (building_stmt_list_p ());
13871 /* The current function is being defined, so its DECL_INITIAL should
13872 be set, and unless there's a multiple definition, it should be
13873 error_mark_node. */
13874 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13876 /* For a cloned function, we've already got all the code we need;
13877 there's no need to add any extra bits. */
13878 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13880 /* Make it so that `main' always returns 0 by default. */
13881 if (DECL_MAIN_P (current_function_decl
))
13882 finish_return_stmt (integer_zero_node
);
13884 if (use_eh_spec_block (current_function_decl
))
13885 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13886 (TREE_TYPE (current_function_decl
)),
13887 current_eh_spec_block
);
13890 /* If we're saving up tree structure, tie off the function now. */
13891 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13893 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
13894 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
13896 finish_fname_decls ();
13898 /* If this function can't throw any exceptions, remember that. */
13899 if (!processing_template_decl
13900 && !cp_function_chain
->can_throw
13901 && !flag_non_call_exceptions
13902 && !decl_replaceable_p (fndecl
))
13903 TREE_NOTHROW (fndecl
) = 1;
13905 /* This must come after expand_function_end because cleanups might
13906 have declarations (from inline functions) that need to go into
13907 this function's blocks. */
13909 /* If the current binding level isn't the outermost binding level
13910 for this function, either there is a bug, or we have experienced
13911 syntax errors and the statement tree is malformed. */
13912 if (current_binding_level
->kind
!= sk_function_parms
)
13914 /* Make sure we have already experienced errors. */
13915 gcc_assert (errorcount
);
13917 /* Throw away the broken statement tree and extra binding
13919 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13921 while (current_binding_level
->kind
!= sk_function_parms
)
13923 if (current_binding_level
->kind
== sk_class
)
13924 pop_nested_class ();
13926 poplevel (0, 0, 0);
13929 poplevel (1, 0, 1);
13931 /* Statements should always be full-expressions at the outermost set
13932 of curly braces for a function. */
13933 gcc_assert (stmts_are_full_exprs_p ());
13935 /* If there are no return statements in a function with auto return type,
13936 the return type is void. But if the declared type is something like
13937 auto*, this is an error. */
13938 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
13939 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
13941 if (!is_auto (current_function_auto_return_pattern
)
13942 && !current_function_returns_value
&& !current_function_returns_null
)
13944 error ("no return statements in function returning %qT",
13945 current_function_auto_return_pattern
);
13946 inform (input_location
, "only plain %<auto%> return type can be "
13947 "deduced to %<void%>");
13949 apply_deduced_return_type (fndecl
, void_type_node
);
13950 fntype
= TREE_TYPE (fndecl
);
13953 /* Save constexpr function body before it gets munged by
13954 the NRV transformation. */
13955 maybe_save_function_definition (fndecl
);
13957 /* Set up the named return value optimization, if we can. Candidate
13958 variables are selected in check_return_expr. */
13959 if (current_function_return_value
)
13961 tree r
= current_function_return_value
;
13964 if (r
!= error_mark_node
13965 /* This is only worth doing for fns that return in memory--and
13966 simpler, since we don't have to worry about promoted modes. */
13967 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13968 /* Only allow this for variables declared in the outer scope of
13969 the function so we know that their lifetime always ends with a
13970 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13971 we were to do this optimization in tree-ssa. */
13972 && (outer
= outer_curly_brace_block (fndecl
))
13973 && chain_member (r
, BLOCK_VARS (outer
)))
13974 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13976 current_function_return_value
= NULL_TREE
;
13979 /* Remember that we were in class scope. */
13980 if (current_class_name
)
13981 ctype
= current_class_type
;
13983 /* Must mark the RESULT_DECL as being in this function. */
13984 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13986 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13987 to the FUNCTION_DECL node itself. */
13988 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13990 /* Save away current state, if appropriate. */
13991 if (!processing_template_decl
)
13992 save_function_data (fndecl
);
13994 /* Complain if there's just no return statement. */
13995 if (warn_return_type
13996 && !VOID_TYPE_P (TREE_TYPE (fntype
))
13997 && !dependent_type_p (TREE_TYPE (fntype
))
13998 && !current_function_returns_value
&& !current_function_returns_null
13999 /* Don't complain if we abort or throw. */
14000 && !current_function_returns_abnormally
14001 /* Don't complain if there's an infinite loop. */
14002 && !current_function_infinite_loop
14003 /* Don't complain if we are declared noreturn. */
14004 && !TREE_THIS_VOLATILE (fndecl
)
14005 && !DECL_NAME (DECL_RESULT (fndecl
))
14006 && !TREE_NO_WARNING (fndecl
)
14007 /* Structor return values (if any) are set by the compiler. */
14008 && !DECL_CONSTRUCTOR_P (fndecl
)
14009 && !DECL_DESTRUCTOR_P (fndecl
)
14010 && targetm
.warn_func_return (fndecl
))
14012 warning (OPT_Wreturn_type
,
14013 "no return statement in function returning non-void");
14014 TREE_NO_WARNING (fndecl
) = 1;
14017 /* Store the end of the function, so that we get good line number
14018 info for the epilogue. */
14019 cfun
->function_end_locus
= input_location
;
14021 /* Complain about parameters that are only set, but never otherwise used. */
14022 if (warn_unused_but_set_parameter
14023 && !processing_template_decl
14024 && errorcount
== unused_but_set_errorcount
14025 && !DECL_CLONED_FUNCTION_P (fndecl
))
14029 for (decl
= DECL_ARGUMENTS (fndecl
);
14031 decl
= DECL_CHAIN (decl
))
14032 if (TREE_USED (decl
)
14033 && TREE_CODE (decl
) == PARM_DECL
14034 && !DECL_READ_P (decl
)
14035 && DECL_NAME (decl
)
14036 && !DECL_ARTIFICIAL (decl
)
14037 && !TREE_NO_WARNING (decl
)
14038 && !DECL_IN_SYSTEM_HEADER (decl
)
14039 && TREE_TYPE (decl
) != error_mark_node
14040 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14041 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14042 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14043 warning (OPT_Wunused_but_set_parameter
,
14044 "parameter %q+D set but not used", decl
);
14045 unused_but_set_errorcount
= errorcount
;
14048 /* Complain about locally defined typedefs that are not used in this
14050 maybe_warn_unused_local_typedefs ();
14052 /* Genericize before inlining. */
14053 if (!processing_template_decl
)
14055 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14056 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14057 cp_genericize (fndecl
);
14058 /* Clear out the bits we don't need. */
14059 f
->x_current_class_ptr
= NULL
;
14060 f
->x_current_class_ref
= NULL
;
14061 f
->x_eh_spec_block
= NULL
;
14062 f
->x_in_charge_parm
= NULL
;
14063 f
->x_vtt_parm
= NULL
;
14064 f
->x_return_value
= NULL
;
14065 f
->bindings
= NULL
;
14066 f
->extern_decl_map
= NULL
;
14067 f
->infinite_loops
= NULL
;
14069 /* Clear out the bits we don't need. */
14070 local_names
= NULL
;
14072 /* We're leaving the context of this function, so zap cfun. It's still in
14073 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14075 current_function_decl
= NULL
;
14077 /* If this is an in-class inline definition, we may have to pop the
14078 bindings for the template parameters that we added in
14079 maybe_begin_member_template_processing when start_function was
14081 if (inclass_inline
)
14082 maybe_end_member_template_processing ();
14084 /* Leave the scope of the class. */
14086 pop_nested_class ();
14091 current_function_decl
= NULL_TREE
;
14093 defer_mark_used_calls
= false;
14094 if (deferred_mark_used_calls
)
14099 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14101 vec_free (deferred_mark_used_calls
);
14107 /* Create the FUNCTION_DECL for a function definition.
14108 DECLSPECS and DECLARATOR are the parts of the declaration;
14109 they describe the return type and the name of the function,
14110 but twisted together in a fashion that parallels the syntax of C.
14112 This function creates a binding context for the function body
14113 as well as setting up the FUNCTION_DECL in current_function_decl.
14115 Returns a FUNCTION_DECL on success.
14117 If the DECLARATOR is not suitable for a function (it defines a datum
14118 instead), we return 0, which tells yyparse to report a parse error.
14120 May return void_type_node indicating that this method is actually
14121 a friend. See grokfield for more details.
14123 Came here with a `.pushlevel' .
14125 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14126 CHANGES TO CODE IN `grokfield'. */
14129 grokmethod (cp_decl_specifier_seq
*declspecs
,
14130 const cp_declarator
*declarator
, tree attrlist
)
14132 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14135 if (fndecl
== error_mark_node
)
14136 return error_mark_node
;
14138 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14140 error ("invalid member function declaration");
14141 return error_mark_node
;
14145 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14147 /* Pass friends other than inline friend functions back. */
14148 if (fndecl
== void_type_node
)
14151 if (DECL_IN_AGGR_P (fndecl
))
14153 if (DECL_CLASS_SCOPE_P (fndecl
))
14154 error ("%qD is already defined in class %qT", fndecl
,
14155 DECL_CONTEXT (fndecl
));
14156 return error_mark_node
;
14159 check_template_shadow (fndecl
);
14161 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14162 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14164 /* We process method specializations in finish_struct_1. */
14165 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14167 fndecl
= push_template_decl (fndecl
);
14168 if (fndecl
== error_mark_node
)
14172 if (! DECL_FRIEND_P (fndecl
))
14174 if (DECL_CHAIN (fndecl
))
14176 fndecl
= copy_node (fndecl
);
14177 TREE_CHAIN (fndecl
) = NULL_TREE
;
14181 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14183 DECL_IN_AGGR_P (fndecl
) = 1;
14188 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14189 we can lay it out later, when and if its type becomes complete.
14191 Also handle constexpr pointer to member variables where the initializer
14192 is an unlowered PTRMEM_CST because the class isn't complete yet. */
14195 maybe_register_incomplete_var (tree var
)
14197 gcc_assert (VAR_P (var
));
14199 /* Keep track of variables with incomplete types. */
14200 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14201 && DECL_EXTERNAL (var
))
14203 tree inner_type
= TREE_TYPE (var
);
14205 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14206 inner_type
= TREE_TYPE (inner_type
);
14207 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14209 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14210 /* RTTI TD entries are created while defining the type_info. */
14211 || (TYPE_LANG_SPECIFIC (inner_type
)
14212 && TYPE_BEING_DEFINED (inner_type
)))
14214 incomplete_var iv
= {var
, inner_type
};
14215 vec_safe_push (incomplete_vars
, iv
);
14217 else if (TYPE_PTRMEM_P (inner_type
)
14218 && DECL_INITIAL (var
)
14219 && TREE_CODE (DECL_INITIAL (var
)) == PTRMEM_CST
)
14221 tree context
= TYPE_PTRMEM_CLASS_TYPE (inner_type
);
14222 gcc_assert (TYPE_BEING_DEFINED (context
));
14223 incomplete_var iv
= {var
, context
};
14224 vec_safe_push (incomplete_vars
, iv
);
14229 /* Called when a class type (given by TYPE) is defined. If there are
14230 any existing VAR_DECLs whose type has been completed by this
14231 declaration, update them now. */
14234 complete_vars (tree type
)
14237 incomplete_var
*iv
;
14239 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14241 if (same_type_p (type
, iv
->incomplete_type
))
14243 tree var
= iv
->decl
;
14244 tree type
= TREE_TYPE (var
);
14246 if (TYPE_PTRMEM_P (type
))
14247 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14250 /* Complete the type of the variable. The VAR_DECL itself
14251 will be laid out in expand_expr. */
14252 complete_type (type
);
14253 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14256 /* Remove this entry from the list. */
14257 incomplete_vars
->unordered_remove (ix
);
14263 /* Check for pending declarations which may have abstract type. */
14264 complete_type_check_abstract (type
);
14267 /* If DECL is of a type which needs a cleanup, build and return an
14268 expression to perform that cleanup here. Return NULL_TREE if no
14269 cleanup need be done. */
14272 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14278 /* Assume no cleanup is required. */
14279 cleanup
= NULL_TREE
;
14281 if (error_operand_p (decl
))
14284 /* Handle "__attribute__((cleanup))". We run the cleanup function
14285 before the destructor since the destructor is what actually
14286 terminates the lifetime of the object. */
14287 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14294 /* Get the name specified by the user for the cleanup function. */
14295 id
= TREE_VALUE (TREE_VALUE (attr
));
14296 /* Look up the name to find the cleanup function to call. It is
14297 important to use lookup_name here because that is what is
14298 used in c-common.c:handle_cleanup_attribute when performing
14299 initial checks on the attribute. Note that those checks
14300 include ensuring that the function found is not an overloaded
14301 function, or an object with an overloaded call operator,
14302 etc.; we can rely on the fact that the function found is an
14303 ordinary FUNCTION_DECL. */
14304 fn
= lookup_name (id
);
14305 arg
= build_address (decl
);
14307 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14308 if (cleanup
== error_mark_node
)
14309 return error_mark_node
;
14311 /* Handle ordinary C++ destructors. */
14312 type
= TREE_TYPE (decl
);
14313 if (type_build_dtor_call (type
))
14315 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14319 if (TREE_CODE (type
) == ARRAY_TYPE
)
14322 addr
= build_address (decl
);
14324 call
= build_delete (TREE_TYPE (addr
), addr
,
14325 sfk_complete_destructor
, flags
, 0, complain
);
14326 if (call
== error_mark_node
)
14327 cleanup
= error_mark_node
;
14328 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14329 /* Discard the call. */;
14331 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14336 /* build_delete sets the location of the destructor call to the
14337 current location, even though the destructor is going to be
14338 called later, at the end of the current scope. This can lead to
14339 a "jumpy" behaviour for users of debuggers when they step around
14340 the end of the block. So let's unset the location of the
14341 destructor call instead. */
14342 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14343 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14346 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
))))
14347 /* Treat objects with destructors as used; the destructor may do
14348 something substantive. */
14355 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14356 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14357 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14360 static_fn_type (tree memfntype
)
14365 if (TYPE_PTRMEMFUNC_P (memfntype
))
14366 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14367 if (POINTER_TYPE_P (memfntype
)
14368 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14369 memfntype
= TREE_TYPE (memfntype
);
14370 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14372 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14373 args
= TYPE_ARG_TYPES (memfntype
);
14374 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14375 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14376 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14377 fntype
= (cp_build_type_attribute_variant
14378 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14379 fntype
= (build_exception_variant
14380 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14384 /* DECL was originally constructed as a non-static member function,
14385 but turned out to be static. Update it accordingly. */
14388 revert_static_member_fn (tree decl
)
14390 tree stype
= static_fn_type (decl
);
14391 cp_cv_quals quals
= type_memfn_quals (stype
);
14392 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14394 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14395 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14397 TREE_TYPE (decl
) = stype
;
14399 if (DECL_ARGUMENTS (decl
))
14400 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14401 DECL_STATIC_FUNCTION_P (decl
) = 1;
14404 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14405 one of the language-independent trees. */
14407 enum cp_tree_node_structure_enum
14408 cp_tree_node_structure (union lang_tree_node
* t
)
14410 switch (TREE_CODE (&t
->generic
))
14412 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14413 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14414 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14415 case OVERLOAD
: return TS_CP_OVERLOAD
;
14416 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14417 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14418 case BASELINK
: return TS_CP_BASELINK
;
14419 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14420 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14421 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14422 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14423 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14424 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14425 default: return TS_CP_GENERIC
;
14429 /* Build the void_list_node (void_type_node having been created). */
14431 build_void_list_node (void)
14433 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14438 cp_missing_noreturn_ok_p (tree decl
)
14440 /* A missing noreturn is ok for the `main' function. */
14441 return DECL_MAIN_P (decl
);
14444 /* Return the COMDAT group into which DECL should be placed. */
14447 cxx_comdat_group (tree decl
)
14451 /* Virtual tables, construction virtual tables, and virtual table
14452 tables all go in a single COMDAT group, named after the primary
14454 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14455 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
14456 /* For all other DECLs, the COMDAT group is the mangled name of the
14457 declaration itself. */
14460 while (DECL_THUNK_P (decl
))
14462 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14463 into the same section as the target function. In that case
14464 we must return target's name. */
14465 tree target
= THUNK_TARGET (decl
);
14466 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14467 && DECL_SECTION_NAME (target
) != NULL
14468 && DECL_ONE_ONLY (target
))
14473 name
= DECL_ASSEMBLER_NAME (decl
);
14479 /* Returns the return type for FN as written by the user, which may include
14480 a placeholder for a deduced return type. */
14483 fndecl_declared_return_type (tree fn
)
14485 fn
= STRIP_TEMPLATE (fn
);
14486 if (FNDECL_USED_AUTO (fn
))
14488 struct language_function
*f
= NULL
;
14489 if (DECL_STRUCT_FUNCTION (fn
))
14490 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14492 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14493 return f
->x_auto_return_pattern
;
14495 return TREE_TYPE (TREE_TYPE (fn
));
14498 /* Returns true iff DECL was declared with an auto return type and it has
14499 not yet been deduced to a real type. */
14502 undeduced_auto_decl (tree decl
)
14504 if (cxx_dialect
< cxx1y
)
14506 return type_uses_auto (TREE_TYPE (decl
));
14509 /* Complain if DECL has an undeduced return type. */
14512 require_deduced_type (tree decl
)
14514 if (undeduced_auto_decl (decl
))
14515 error ("use of %qD before deduction of %<auto%>", decl
);
14518 #include "gt-cp-decl.h"