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"
66 /* Possible cases of bad specifiers type used by bad_specifiers. */
68 BSP_VAR
, /* variable */
69 BSP_PARM
, /* parameter */
74 static tree
grokparms (tree parmlist
, tree
*);
75 static const char *redeclaration_error_message (tree
, tree
);
77 static int decl_jump_unsafe (tree
);
78 static void require_complete_types_for_parms (tree
);
79 static int ambi_op_p (enum tree_code
);
80 static int unary_op_p (enum tree_code
);
81 static void push_local_name (tree
);
82 static tree
grok_reference_init (tree
, tree
, tree
, int);
83 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
85 static int check_static_variable_definition (tree
, tree
);
86 static void record_unknown_type (tree
, const char *);
87 static tree
builtin_function_1 (tree
, tree
, bool);
88 static int member_function_or_else (tree
, tree
, enum overload_flags
);
89 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
91 static void check_for_uninitialized_const_var (tree
);
92 static hashval_t
typename_hash (const void *);
93 static int typename_compare (const void *, const void *);
94 static tree
local_variable_p_walkfn (tree
*, int *, void *);
95 static tree
record_builtin_java_type (const char *, int);
96 static const char *tag_name (enum tag_types
);
97 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
98 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
99 static void maybe_deduce_size_from_array_init (tree
, tree
);
100 static void layout_var_decl (tree
);
101 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
102 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
103 static void save_function_data (tree
);
104 static void copy_type_enum (tree
, tree
);
105 static void check_function_type (tree
, tree
);
106 static void finish_constructor_body (void);
107 static void begin_destructor_body (void);
108 static void finish_destructor_body (void);
109 static void record_key_method_defined (tree
);
110 static tree
create_array_type_for_decl (tree
, tree
, tree
);
111 static tree
get_atexit_node (void);
112 static tree
get_dso_handle_node (void);
113 static tree
start_cleanup_fn (void);
114 static void end_cleanup_fn (void);
115 static tree
cp_make_fname_decl (location_t
, tree
, int);
116 static void initialize_predefined_identifiers (void);
117 static tree check_special_function_return_type
118 (special_function_kind
, tree
, tree
);
119 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
120 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
121 static void store_parm_decls (tree
);
122 static void initialize_local_var (tree
, tree
);
123 static void expand_static_init (tree
, tree
);
125 /* The following symbols are subsumed in the cp_global_trees array, and
126 listed here individually for documentation purposes.
129 tree wchar_decl_node;
131 tree vtable_entry_type;
132 tree delta_type_node;
133 tree __t_desc_type_node;
135 tree class_type_node;
136 tree unknown_type_node;
138 Array type `vtable_entry_type[]'
141 tree vtbl_ptr_type_node;
148 A FUNCTION_DECL which can call `abort'. Not necessarily the
149 one that the user will declare, but sufficient to be called
150 by routines that want to abort the program.
154 The FUNCTION_DECL for the default `::operator delete'.
156 tree global_delete_fndecl;
159 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
160 tree tinfo_var_id; */
162 tree cp_global_trees
[CPTI_MAX
];
164 /* Indicates that there is a type value in some namespace, although
165 that is not necessarily in scope at the moment. */
167 tree global_type_node
;
169 /* The node that holds the "name" of the global scope. */
170 tree global_scope_name
;
172 #define local_names cp_function_chain->x_local_names
174 /* A list of objects which have constructors or destructors
175 which reside in the global scope. The decl is stored in
176 the TREE_VALUE slot and the initializer is stored
177 in the TREE_PURPOSE slot. */
178 tree static_aggregates
;
180 /* Like static_aggregates, but for thread_local variables. */
185 /* A node for the integer constant 2. */
187 tree integer_two_node
;
189 /* Used only for jumps to as-yet undefined labels, since jumps to
190 defined labels can have their validity checked immediately. */
192 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
193 struct named_label_use_entry
*next
;
194 /* The binding level to which this entry is *currently* attached.
195 This is initially the binding level in which the goto appeared,
196 but is modified as scopes are closed. */
197 cp_binding_level
*binding_level
;
198 /* The head of the names list that was current when the goto appeared,
199 or the inner scope popped. These are the decls that will *not* be
200 skipped when jumping to the label. */
202 /* The location of the goto, for error reporting. */
203 location_t o_goto_locus
;
204 /* True if an OpenMP structured block scope has been closed since
205 the goto appeared. This means that the branch from the label will
206 illegally exit an OpenMP scope. */
210 /* A list of all LABEL_DECLs in the function that have names. Here so
211 we can clear out their names' definitions at the end of the
212 function, and so we can check the validity of jumps to these labels. */
214 struct GTY(()) named_label_entry
{
215 /* The decl itself. */
218 /* The binding level to which the label is *currently* attached.
219 This is initially set to the binding level in which the label
220 is defined, but is modified as scopes are closed. */
221 cp_binding_level
*binding_level
;
222 /* The head of the names list that was current when the label was
223 defined, or the inner scope popped. These are the decls that will
224 be skipped when jumping to the label. */
226 /* A vector of all decls from all binding levels that would be
227 crossed by a backward branch to the label. */
228 vec
<tree
, va_gc
> *bad_decls
;
230 /* A list of uses of the label, before the label is defined. */
231 struct named_label_use_entry
*uses
;
233 /* The following bits are set after the label is defined, and are
234 updated as scopes are popped. They indicate that a backward jump
235 to the label will illegally enter a scope of the given flavor. */
241 #define named_labels cp_function_chain->x_named_labels
243 /* The number of function bodies which we are currently processing.
244 (Zero if we are at namespace scope, one inside the body of a
245 function, two inside the body of a function in a local class, etc.) */
248 /* To avoid unwanted recursion, finish_function defers all mark_used calls
249 encountered during its execution until it finishes. */
250 bool defer_mark_used_calls
;
251 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
253 /* States indicating how grokdeclarator() should handle declspecs marked
254 with __attribute__((deprecated)). An object declared as
255 __attribute__((deprecated)) suppresses warnings of uses of other
257 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
260 /* A list of VAR_DECLs whose type was incomplete at the time the
261 variable was declared. */
263 typedef struct GTY(()) incomplete_var_d
{
265 tree incomplete_type
;
269 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
271 /* Returns the kind of template specialization we are currently
272 processing, given that it's declaration contained N_CLASS_SCOPES
273 explicit scope qualifications. */
276 current_tmpl_spec_kind (int n_class_scopes
)
278 int n_template_parm_scopes
= 0;
279 int seen_specialization_p
= 0;
280 int innermost_specialization_p
= 0;
283 /* Scan through the template parameter scopes. */
284 for (b
= current_binding_level
;
285 b
->kind
== sk_template_parms
;
288 /* If we see a specialization scope inside a parameter scope,
289 then something is wrong. That corresponds to a declaration
292 template <class T> template <> ...
294 which is always invalid since [temp.expl.spec] forbids the
295 specialization of a class member template if the enclosing
296 class templates are not explicitly specialized as well. */
297 if (b
->explicit_spec_p
)
299 if (n_template_parm_scopes
== 0)
300 innermost_specialization_p
= 1;
302 seen_specialization_p
= 1;
304 else if (seen_specialization_p
== 1)
305 return tsk_invalid_member_spec
;
307 ++n_template_parm_scopes
;
310 /* Handle explicit instantiations. */
311 if (processing_explicit_instantiation
)
313 if (n_template_parm_scopes
!= 0)
314 /* We've seen a template parameter list during an explicit
315 instantiation. For example:
317 template <class T> template void f(int);
319 This is erroneous. */
320 return tsk_invalid_expl_inst
;
322 return tsk_expl_inst
;
325 if (n_template_parm_scopes
< n_class_scopes
)
326 /* We've not seen enough template headers to match all the
327 specialized classes present. For example:
329 template <class T> void R<T>::S<T>::f(int);
331 This is invalid; there needs to be one set of template
332 parameters for each class. */
333 return tsk_insufficient_parms
;
334 else if (n_template_parm_scopes
== n_class_scopes
)
335 /* We're processing a non-template declaration (even though it may
336 be a member of a template class.) For example:
338 template <class T> void S<T>::f(int);
340 The `class T' matches the `S<T>', leaving no template headers
341 corresponding to the `f'. */
343 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
344 /* We've got too many template headers. For example:
346 template <> template <class T> void f (T);
348 There need to be more enclosing classes. */
349 return tsk_excessive_parms
;
351 /* This must be a template. It's of the form:
353 template <class T> template <class U> void S<T>::f(U);
355 This is a specialization if the innermost level was a
356 specialization; otherwise it's just a definition of the
358 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
361 /* Exit the current scope. */
369 /* When a label goes out of scope, check to see if that label was used
370 in a valid manner, and issue any appropriate warnings or errors. */
373 pop_label (tree label
, tree old_value
)
375 if (!processing_template_decl
)
377 if (DECL_INITIAL (label
) == NULL_TREE
)
381 error ("label %q+D used but not defined", label
);
382 location
= input_location
;
383 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
384 /* Avoid crashing later. */
385 define_label (location
, DECL_NAME (label
));
388 warn_for_unused_label (label
);
391 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
394 /* At the end of a function, all labels declared within the function
395 go out of scope. BLOCK is the top-level block for the
399 pop_labels_1 (void **slot
, void *data
)
401 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
402 tree block
= (tree
) data
;
404 pop_label (ent
->label_decl
, NULL_TREE
);
406 /* Put the labels into the "variables" of the top-level block,
407 so debugger can see them. */
408 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
409 BLOCK_VARS (block
) = ent
->label_decl
;
411 htab_clear_slot (named_labels
, slot
);
417 pop_labels (tree block
)
421 htab_traverse (named_labels
, pop_labels_1
, block
);
426 /* At the end of a block with local labels, restore the outer definition. */
429 pop_local_label (tree label
, tree old_value
)
431 struct named_label_entry dummy
;
434 pop_label (label
, old_value
);
436 dummy
.label_decl
= label
;
437 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
438 htab_clear_slot (named_labels
, slot
);
441 /* The following two routines are used to interface to Objective-C++.
442 The binding level is purposely treated as an opaque type. */
445 objc_get_current_scope (void)
447 return current_binding_level
;
450 /* The following routine is used by the NeXT-style SJLJ exceptions;
451 variables get marked 'volatile' so as to not be clobbered by
452 _setjmp()/_longjmp() calls. All variables in the current scope,
453 as well as parent scopes up to (but not including) ENCLOSING_BLK
454 shall be thusly marked. */
457 objc_mark_locals_volatile (void *enclosing_blk
)
459 cp_binding_level
*scope
;
461 for (scope
= current_binding_level
;
462 scope
&& scope
!= enclosing_blk
;
463 scope
= scope
->level_chain
)
467 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
468 objc_volatilize_decl (decl
);
470 /* Do not climb up past the current function. */
471 if (scope
->kind
== sk_function_parms
)
476 /* Update data for defined and undefined labels when leaving a scope. */
479 poplevel_named_label_1 (void **slot
, void *data
)
481 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
482 cp_binding_level
*bl
= (cp_binding_level
*) data
;
483 cp_binding_level
*obl
= bl
->level_chain
;
485 if (ent
->binding_level
== bl
)
489 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
490 TREE_LISTs representing OVERLOADs, so be careful. */
491 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
493 : TREE_CHAIN (decl
)))
494 if (decl_jump_unsafe (decl
))
495 vec_safe_push (ent
->bad_decls
, decl
);
497 ent
->binding_level
= obl
;
498 ent
->names_in_scope
= obl
->names
;
502 ent
->in_try_scope
= true;
505 ent
->in_catch_scope
= true;
508 ent
->in_omp_scope
= true;
516 struct named_label_use_entry
*use
;
518 for (use
= ent
->uses
; use
; use
= use
->next
)
519 if (use
->binding_level
== bl
)
521 use
->binding_level
= obl
;
522 use
->names_in_scope
= obl
->names
;
523 if (bl
->kind
== sk_omp
)
524 use
->in_omp_scope
= true;
531 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
532 when errors were reported, except for -Werror-unused-but-set-*. */
533 static int unused_but_set_errorcount
;
535 /* Exit a binding level.
536 Pop the level off, and restore the state of the identifier-decl mappings
537 that were in effect when this level was entered.
539 If KEEP == 1, this level had explicit declarations, so
540 and create a "block" (a BLOCK node) for the level
541 to record its declarations and subblocks for symbol table output.
543 If FUNCTIONBODY is nonzero, this level is the body of a function,
544 so create a block as if KEEP were set and also clear out all
547 If REVERSE is nonzero, reverse the order of decls before putting
548 them into the BLOCK. */
551 poplevel (int keep
, int reverse
, int functionbody
)
554 /* The chain of decls was accumulated in reverse order.
555 Put it into forward order, just for cleanliness. */
560 int leaving_for_scope
;
563 cp_label_binding
*label_bind
;
565 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
,
1172 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1173 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1175 /* Two default specs are equivalent, don't force evaluation. */
1176 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1177 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1180 maybe_instantiate_noexcept (new_decl
);
1181 maybe_instantiate_noexcept (old_decl
);
1182 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1183 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1187 If any declaration of a function has an exception-specification,
1188 all declarations, including the definition and an explicit
1189 specialization, of that function shall have an
1190 exception-specification with the same set of type-ids. */
1191 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1192 && ! DECL_IS_BUILTIN (old_decl
)
1194 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1196 error ("declaration of %qF has a different exception specifier",
1198 error ("from previous declaration %q+F", old_decl
);
1202 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1203 Otherwise issue diagnostics. */
1206 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1208 old_decl
= STRIP_TEMPLATE (old_decl
);
1209 new_decl
= STRIP_TEMPLATE (new_decl
);
1210 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1211 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1213 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1214 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1216 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1218 if (DECL_BUILT_IN (old_decl
))
1220 /* Hide a built-in declaration. */
1221 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1222 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1225 /* 7.1.5 [dcl.constexpr]
1226 Note: An explicit specialization can differ from the template
1227 declaration with respect to the constexpr specifier. */
1228 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1229 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1232 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1233 error ("from previous declaration %q+D", old_decl
);
1239 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1240 && lookup_attribute ("gnu_inline", \
1241 DECL_ATTRIBUTES (fn)))
1243 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1244 If the redeclaration is invalid, a diagnostic is issued, and the
1245 error_mark_node is returned. Otherwise, OLDDECL is returned.
1247 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1250 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1253 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1255 unsigned olddecl_uid
= DECL_UID (olddecl
);
1256 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1257 int new_defines_function
= 0;
1258 tree new_template_info
;
1260 if (newdecl
== olddecl
)
1263 types_match
= decls_match (newdecl
, olddecl
);
1265 /* If either the type of the new decl or the type of the old decl is an
1266 error_mark_node, then that implies that we have already issued an
1267 error (earlier) for some bogus type specification, and in that case,
1268 it is rather pointless to harass the user with yet more error message
1269 about the same declaration, so just pretend the types match here. */
1270 if (TREE_TYPE (newdecl
) == error_mark_node
1271 || TREE_TYPE (olddecl
) == error_mark_node
)
1272 return error_mark_node
;
1274 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1275 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1277 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1278 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1279 && check_raw_literal_operator (olddecl
))
1280 error ("literal operator template %q+D conflicts with"
1281 " raw literal operator %qD", newdecl
, olddecl
);
1282 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1283 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1284 && check_raw_literal_operator (newdecl
))
1285 error ("raw literal operator %q+D conflicts with"
1286 " literal operator template %qD", newdecl
, olddecl
);
1289 if (DECL_P (olddecl
)
1290 && TREE_CODE (newdecl
) == FUNCTION_DECL
1291 && TREE_CODE (olddecl
) == FUNCTION_DECL
1292 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1294 if (DECL_DECLARED_INLINE_P (newdecl
)
1295 && DECL_UNINLINABLE (newdecl
)
1296 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1297 /* Already warned elsewhere. */;
1298 else if (DECL_DECLARED_INLINE_P (olddecl
)
1299 && DECL_UNINLINABLE (olddecl
)
1300 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1301 /* Already warned. */;
1302 else if (DECL_DECLARED_INLINE_P (newdecl
)
1303 && DECL_UNINLINABLE (olddecl
)
1304 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1306 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1308 inform (DECL_SOURCE_LOCATION (olddecl
),
1309 "previous declaration of %qD with attribute noinline",
1312 else if (DECL_DECLARED_INLINE_P (olddecl
)
1313 && DECL_UNINLINABLE (newdecl
)
1314 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1316 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1317 "attribute noinline", newdecl
))
1318 inform (DECL_SOURCE_LOCATION (olddecl
),
1319 "previous declaration of %qD was inline",
1324 /* Check for redeclaration and other discrepancies. */
1325 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1326 && DECL_ARTIFICIAL (olddecl
))
1328 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1329 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1331 /* Avoid warnings redeclaring built-ins which have not been
1332 explicitly declared. */
1333 if (DECL_ANTICIPATED (olddecl
))
1336 /* If you declare a built-in or predefined function name as static,
1337 the old definition is overridden, but optionally warn this was a
1338 bad choice of name. */
1339 if (! TREE_PUBLIC (newdecl
))
1341 warning (OPT_Wshadow
,
1342 DECL_BUILT_IN (olddecl
)
1343 ? G_("shadowing built-in function %q#D")
1344 : G_("shadowing library function %q#D"), olddecl
);
1345 /* Discard the old built-in function. */
1348 /* If the built-in is not ansi, then programs can override
1349 it even globally without an error. */
1350 else if (! DECL_BUILT_IN (olddecl
))
1351 warning (0, "library function %q#D redeclared as non-function %q#D",
1354 error ("declaration of %q#D conflicts with built-in "
1355 "declaration %q#D", newdecl
, olddecl
);
1358 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1360 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1361 error_at (DECL_SOURCE_LOCATION (newdecl
),
1362 "redeclaration of %<pragma omp declare reduction%>");
1363 inform (DECL_SOURCE_LOCATION (olddecl
),
1364 "previous %<pragma omp declare reduction%> declaration");
1365 return error_mark_node
;
1367 else if (!types_match
)
1369 /* Avoid warnings redeclaring built-ins which have not been
1370 explicitly declared. */
1371 if (DECL_ANTICIPATED (olddecl
))
1373 /* Deal with fileptr_type_node. FILE type is not known
1374 at the time we create the builtins. */
1377 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1378 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1380 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1383 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1385 tree t
= TREE_VALUE (t1
);
1388 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1389 == get_identifier ("FILE")
1390 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1392 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1394 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1395 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1396 types_match
= decls_match (newdecl
, olddecl
);
1398 return duplicate_decls (newdecl
, olddecl
,
1400 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1403 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1406 else if ((DECL_EXTERN_C_P (newdecl
)
1407 && DECL_EXTERN_C_P (olddecl
))
1408 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1409 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1411 /* A near match; override the builtin. */
1413 if (TREE_PUBLIC (newdecl
))
1414 warning (0, "new declaration %q#D ambiguates built-in "
1415 "declaration %q#D", newdecl
, olddecl
);
1417 warning (OPT_Wshadow
,
1418 DECL_BUILT_IN (olddecl
)
1419 ? G_("shadowing built-in function %q#D")
1420 : G_("shadowing library function %q#D"), olddecl
);
1423 /* Discard the old built-in function. */
1426 /* Replace the old RTL to avoid problems with inlining. */
1427 COPY_DECL_RTL (newdecl
, olddecl
);
1429 /* Even if the types match, prefer the new declarations type for
1430 built-ins which have not been explicitly declared, for
1431 exception lists, etc... */
1432 else if (DECL_IS_BUILTIN (olddecl
))
1434 tree type
= TREE_TYPE (newdecl
);
1435 tree attribs
= (*targetm
.merge_type_attributes
)
1436 (TREE_TYPE (olddecl
), type
);
1438 type
= cp_build_type_attribute_variant (type
, attribs
);
1439 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1442 /* If a function is explicitly declared "throw ()", propagate that to
1443 the corresponding builtin. */
1444 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1445 && DECL_ANTICIPATED (olddecl
)
1446 && TREE_NOTHROW (newdecl
)
1447 && !TREE_NOTHROW (olddecl
))
1449 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1450 tree tmpdecl
= builtin_decl_explicit (fncode
);
1451 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1452 TREE_NOTHROW (tmpdecl
) = 1;
1455 /* Whether or not the builtin can throw exceptions has no
1456 bearing on this declarator. */
1457 TREE_NOTHROW (olddecl
) = 0;
1459 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1461 /* If a builtin function is redeclared as `static', merge
1462 the declarations, but make the original one static. */
1463 DECL_THIS_STATIC (olddecl
) = 1;
1464 TREE_PUBLIC (olddecl
) = 0;
1466 /* Make the old declaration consistent with the new one so
1467 that all remnants of the builtin-ness of this function
1468 will be banished. */
1469 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1470 COPY_DECL_RTL (newdecl
, olddecl
);
1473 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1475 /* C++ Standard, 3.3, clause 4:
1476 "[Note: a namespace name or a class template name must be unique
1477 in its declarative region (7.3.2, clause 14). ]" */
1478 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1479 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1480 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1481 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1482 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1483 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1485 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1486 && TREE_CODE (newdecl
) != TYPE_DECL
)
1487 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1488 && TREE_CODE (olddecl
) != TYPE_DECL
))
1490 /* We do nothing special here, because C++ does such nasty
1491 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1492 get shadowed, and know that if we need to find a TYPE_DECL
1493 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1494 slot of the identifier. */
1498 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1499 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1500 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1501 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1505 error ("%q#D redeclared as different kind of symbol", newdecl
);
1506 if (TREE_CODE (olddecl
) == TREE_LIST
)
1507 olddecl
= TREE_VALUE (olddecl
);
1508 inform (DECL_SOURCE_LOCATION (olddecl
),
1509 "previous declaration %q#D", olddecl
);
1511 return error_mark_node
;
1513 else if (!types_match
)
1515 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1516 /* These are certainly not duplicate declarations; they're
1517 from different scopes. */
1520 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1522 /* The name of a class template may not be declared to refer to
1523 any other template, class, function, object, namespace, value,
1524 or type in the same scope. */
1525 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1526 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1528 error ("conflicting declaration of template %q#D", newdecl
);
1529 inform (DECL_SOURCE_LOCATION (olddecl
),
1530 "previous declaration %q#D", olddecl
);
1531 return error_mark_node
;
1533 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1534 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1535 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1536 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1537 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1538 DECL_TEMPLATE_PARMS (olddecl
))
1539 /* Template functions can be disambiguated by
1541 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1542 TREE_TYPE (TREE_TYPE (olddecl
))))
1544 error ("ambiguating new declaration %q#D", newdecl
);
1545 inform (DECL_SOURCE_LOCATION (olddecl
),
1546 "old declaration %q#D", olddecl
);
1550 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1552 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1554 error ("conflicting declaration of C function %q#D",
1556 inform (DECL_SOURCE_LOCATION (olddecl
),
1557 "previous declaration %q#D", olddecl
);
1560 /* For function versions, params and types match, but they
1561 are not ambiguous. */
1562 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1563 && !DECL_FUNCTION_VERSIONED (olddecl
))
1564 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1565 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1567 error ("ambiguating new declaration of %q#D", newdecl
);
1568 inform (DECL_SOURCE_LOCATION (olddecl
),
1569 "old declaration %q#D", olddecl
);
1570 return error_mark_node
;
1577 error ("conflicting declaration %q#D", newdecl
);
1578 inform (DECL_SOURCE_LOCATION (olddecl
),
1579 "previous declaration as %q#D", olddecl
);
1580 return error_mark_node
;
1583 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1584 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1585 && (!DECL_TEMPLATE_INFO (newdecl
)
1586 || (DECL_TI_TEMPLATE (newdecl
)
1587 != DECL_TI_TEMPLATE (olddecl
))))
1588 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1589 && (!DECL_TEMPLATE_INFO (olddecl
)
1590 || (DECL_TI_TEMPLATE (olddecl
)
1591 != DECL_TI_TEMPLATE (newdecl
))))))
1592 /* It's OK to have a template specialization and a non-template
1593 with the same type, or to have specializations of two
1594 different templates with the same type. Note that if one is a
1595 specialization, and the other is an instantiation of the same
1596 template, that we do not exit at this point. That situation
1597 can occur if we instantiate a template class, and then
1598 specialize one of its methods. This situation is valid, but
1599 the declarations must be merged in the usual way. */
1601 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1602 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1603 && !DECL_USE_TEMPLATE (newdecl
))
1604 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1605 && !DECL_USE_TEMPLATE (olddecl
))))
1606 /* One of the declarations is a template instantiation, and the
1607 other is not a template at all. That's OK. */
1609 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1611 /* In [namespace.alias] we have:
1613 In a declarative region, a namespace-alias-definition can be
1614 used to redefine a namespace-alias declared in that declarative
1615 region to refer only to the namespace to which it already
1618 Therefore, if we encounter a second alias directive for the same
1619 alias, we can just ignore the second directive. */
1620 if (DECL_NAMESPACE_ALIAS (newdecl
)
1621 && (DECL_NAMESPACE_ALIAS (newdecl
)
1622 == DECL_NAMESPACE_ALIAS (olddecl
)))
1624 /* [namespace.alias]
1626 A namespace-name or namespace-alias shall not be declared as
1627 the name of any other entity in the same declarative region.
1628 A namespace-name defined at global scope shall not be
1629 declared as the name of any other entity in any global scope
1631 error ("conflicting declaration of namespace %qD", newdecl
);
1632 inform (DECL_SOURCE_LOCATION (olddecl
),
1633 "previous declaration of namespace %qD here", olddecl
);
1634 return error_mark_node
;
1638 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1641 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1642 if (DECL_NAME (olddecl
) != NULL_TREE
)
1643 inform (input_location
,
1644 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1645 ? G_("%q+#D previously defined here")
1646 : G_("%q+#D previously declared here"), olddecl
);
1647 return error_mark_node
;
1649 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1650 && DECL_INITIAL (olddecl
) != NULL_TREE
1651 && !prototype_p (TREE_TYPE (olddecl
))
1652 && prototype_p (TREE_TYPE (newdecl
)))
1654 /* Prototype decl follows defn w/o prototype. */
1655 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1656 "prototype specified for %q#D", newdecl
))
1657 inform (DECL_SOURCE_LOCATION (olddecl
),
1658 "previous non-prototype definition here");
1660 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1661 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1664 If two declarations of the same function or object
1665 specify different linkage-specifications ..., the program
1666 is ill-formed.... Except for functions with C++ linkage,
1667 a function declaration without a linkage specification
1668 shall not precede the first linkage specification for
1669 that function. A function can be declared without a
1670 linkage specification after an explicit linkage
1671 specification has been seen; the linkage explicitly
1672 specified in the earlier declaration is not affected by
1673 such a function declaration.
1675 DR 563 raises the question why the restrictions on
1676 functions should not also apply to objects. Older
1677 versions of G++ silently ignore the linkage-specification
1685 which is clearly wrong. Therefore, we now treat objects
1687 if (current_lang_depth () == 0)
1689 /* There is no explicit linkage-specification, so we use
1690 the linkage from the previous declaration. */
1691 if (!DECL_LANG_SPECIFIC (newdecl
))
1692 retrofit_lang_decl (newdecl
);
1693 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1697 error ("conflicting declaration of %q#D with %qL linkage",
1698 newdecl
, DECL_LANGUAGE (newdecl
));
1699 inform (DECL_SOURCE_LOCATION (olddecl
),
1700 "previous declaration with %qL linkage",
1701 DECL_LANGUAGE (olddecl
));
1705 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1707 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1709 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1710 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1713 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1714 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1716 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
1717 && CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (newdecl
)))
1720 Default arguments for a member function of a class template
1721 shall be specified on the initial declaration of the member
1722 function within the class template. */
1723 for (; t2
&& t2
!= void_list_node
; t2
= TREE_CHAIN (t2
))
1724 if (TREE_PURPOSE (t2
))
1726 permerror (input_location
,
1727 "redeclaration of %q#D may not have default "
1728 "arguments", newdecl
);
1734 for (; t1
&& t1
!= void_list_node
;
1735 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1736 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1738 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1741 if (permerror (input_location
,
1742 "default argument given for parameter "
1743 "%d of %q#D", i
, newdecl
))
1744 inform (DECL_SOURCE_LOCATION (olddecl
),
1745 "previous specification in %q#D here",
1750 error ("default argument given for parameter %d "
1751 "of %q#D", i
, newdecl
);
1752 inform (DECL_SOURCE_LOCATION (olddecl
),
1753 "previous specification in %q#D here",
1761 /* Do not merge an implicit typedef with an explicit one. In:
1765 typedef class A A __attribute__ ((foo));
1767 the attribute should apply only to the typedef. */
1768 if (TREE_CODE (olddecl
) == TYPE_DECL
1769 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1770 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1773 /* If new decl is `static' and an `extern' was seen previously,
1775 warn_extern_redeclared_static (newdecl
, olddecl
);
1777 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1778 return error_mark_node
;
1780 /* We have committed to returning 1 at this point. */
1781 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1783 /* Now that functions must hold information normally held
1784 by field decls, there is extra work to do so that
1785 declaration information does not get destroyed during
1787 if (DECL_VINDEX (olddecl
))
1788 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1789 if (DECL_CONTEXT (olddecl
))
1790 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1791 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1792 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1793 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1794 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1795 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1796 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1797 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1798 SET_OVERLOADED_OPERATOR_CODE
1799 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1800 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1802 /* Optionally warn about more than one declaration for the same
1803 name, but don't warn about a function declaration followed by a
1805 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1806 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1807 /* Don't warn about extern decl followed by definition. */
1808 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1809 /* Don't warn about friends, let add_friend take care of it. */
1810 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1811 /* Don't warn about declaration followed by specialization. */
1812 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1813 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1815 if (warning (OPT_Wredundant_decls
,
1816 "redundant redeclaration of %qD in same scope",
1818 inform (DECL_SOURCE_LOCATION (olddecl
),
1819 "previous declaration of %qD", olddecl
);
1822 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1823 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1825 if (DECL_DELETED_FN (newdecl
))
1827 error ("deleted definition of %qD", newdecl
);
1828 inform (DECL_SOURCE_LOCATION (olddecl
),
1829 "previous declaration of %qD", olddecl
);
1831 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1835 /* Deal with C++: must preserve virtual function table size. */
1836 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1838 tree newtype
= TREE_TYPE (newdecl
);
1839 tree oldtype
= TREE_TYPE (olddecl
);
1841 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1842 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1843 CLASSTYPE_FRIEND_CLASSES (newtype
)
1844 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1846 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1849 /* Copy all the DECL_... slots specified in the new decl
1850 except for any that we copy here from the old type. */
1851 DECL_ATTRIBUTES (newdecl
)
1852 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1854 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1858 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1859 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1860 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1861 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1862 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1863 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1865 DECL_ATTRIBUTES (old_result
)
1866 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1868 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1870 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1871 && DECL_INITIAL (new_result
))
1873 if (DECL_INITIAL (old_result
))
1874 DECL_UNINLINABLE (old_result
) = 1;
1876 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1877 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1878 DECL_NOT_REALLY_EXTERN (old_result
)
1879 = DECL_NOT_REALLY_EXTERN (new_result
);
1880 DECL_INTERFACE_KNOWN (old_result
)
1881 = DECL_INTERFACE_KNOWN (new_result
);
1882 DECL_DECLARED_INLINE_P (old_result
)
1883 = DECL_DECLARED_INLINE_P (new_result
);
1884 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1885 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1890 DECL_DECLARED_INLINE_P (old_result
)
1891 |= DECL_DECLARED_INLINE_P (new_result
);
1892 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1893 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1894 check_redeclaration_exception_specification (newdecl
, olddecl
);
1898 /* If the new declaration is a definition, update the file and
1899 line information on the declaration, and also make
1900 the old declaration the same definition. */
1901 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1903 DECL_SOURCE_LOCATION (olddecl
)
1904 = DECL_SOURCE_LOCATION (old_result
)
1905 = DECL_SOURCE_LOCATION (newdecl
);
1906 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1907 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1910 DECL_ARGUMENTS (old_result
)
1911 = DECL_ARGUMENTS (new_result
);
1912 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1913 parm
= DECL_CHAIN (parm
))
1914 DECL_CONTEXT (parm
) = old_result
;
1923 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1924 check_redeclaration_exception_specification (newdecl
, olddecl
);
1926 /* Automatically handles default parameters. */
1927 tree oldtype
= TREE_TYPE (olddecl
);
1930 /* For typedefs use the old type, as the new type's DECL_NAME points
1931 at newdecl, which will be ggc_freed. */
1932 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1935 /* Merge the data types specified in the two decls. */
1936 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1938 if (VAR_P (newdecl
))
1940 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1941 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1942 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1943 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1944 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1945 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1947 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1948 if (DECL_LANG_SPECIFIC (olddecl
)
1949 && CP_DECL_THREADPRIVATE_P (olddecl
))
1951 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1952 if (!DECL_LANG_SPECIFIC (newdecl
))
1953 retrofit_lang_decl (newdecl
);
1955 set_decl_tls_model (newdecl
, DECL_TLS_MODEL (olddecl
));
1956 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1960 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1962 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1963 check_default_args (newdecl
);
1965 /* Lay the type out, unless already done. */
1966 if (! same_type_p (newtype
, oldtype
)
1967 && TREE_TYPE (newdecl
) != error_mark_node
1968 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1969 layout_type (TREE_TYPE (newdecl
));
1971 if ((VAR_P (newdecl
)
1972 || TREE_CODE (newdecl
) == PARM_DECL
1973 || TREE_CODE (newdecl
) == RESULT_DECL
1974 || TREE_CODE (newdecl
) == FIELD_DECL
1975 || TREE_CODE (newdecl
) == TYPE_DECL
)
1976 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1977 layout_decl (newdecl
, 0);
1979 /* Merge the type qualifiers. */
1980 if (TREE_READONLY (newdecl
))
1981 TREE_READONLY (olddecl
) = 1;
1982 if (TREE_THIS_VOLATILE (newdecl
))
1983 TREE_THIS_VOLATILE (olddecl
) = 1;
1984 if (TREE_NOTHROW (newdecl
))
1985 TREE_NOTHROW (olddecl
) = 1;
1987 /* Merge deprecatedness. */
1988 if (TREE_DEPRECATED (newdecl
))
1989 TREE_DEPRECATED (olddecl
) = 1;
1991 /* Preserve function specific target and optimization options */
1992 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1994 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1995 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1996 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1997 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1999 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2000 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2001 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2002 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2005 /* Merge the initialization information. */
2006 if (DECL_INITIAL (newdecl
) == NULL_TREE
2007 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2009 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2010 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2011 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2013 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2014 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2018 /* Merge the section attribute.
2019 We want to issue an error if the sections conflict but that must be
2020 done later in decl_attributes since we are called before attributes
2022 if ((DECL_EXTERNAL (olddecl
) || TREE_PUBLIC (olddecl
) || TREE_STATIC (olddecl
))
2023 && DECL_SECTION_NAME (newdecl
) == NULL
2024 && DECL_SECTION_NAME (olddecl
) != NULL
)
2025 set_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 ((TREE_CODE (olddecl
) == FUNCTION_DECL
|| TREE_CODE (olddecl
) == VAR_DECL
)
2072 && (DECL_EXTERNAL (olddecl
) || TREE_PUBLIC (olddecl
) || TREE_STATIC (olddecl
))
2073 && DECL_ONE_ONLY (olddecl
))
2075 struct symtab_node
*symbol
;
2076 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2077 symbol
= cgraph_get_create_node (newdecl
);
2079 symbol
= varpool_node_for_decl (newdecl
);
2080 symbol
->set_comdat_group (symtab_get_node (olddecl
)->get_comdat_group ());
2083 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2084 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2085 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2086 if (! DECL_EXTERNAL (olddecl
))
2087 DECL_EXTERNAL (newdecl
) = 0;
2089 new_template_info
= NULL_TREE
;
2090 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2092 bool new_redefines_gnu_inline
= false;
2094 if (new_defines_function
2095 && ((DECL_INTERFACE_KNOWN (olddecl
)
2096 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2097 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2098 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2099 == FUNCTION_DECL
))))
2103 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2104 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2106 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2109 if (!new_redefines_gnu_inline
)
2111 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2112 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2113 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2115 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2116 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2117 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2119 /* If the OLDDECL is an instantiation and/or specialization,
2120 then the NEWDECL must be too. But, it may not yet be marked
2121 as such if the caller has created NEWDECL, but has not yet
2122 figured out that it is a redeclaration. */
2123 if (!DECL_USE_TEMPLATE (newdecl
))
2124 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2126 /* Don't really know how much of the language-specific
2127 values we should copy from old to new. */
2128 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2129 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2130 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2131 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2133 if (LANG_DECL_HAS_MIN (newdecl
))
2135 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2136 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2137 if (DECL_TEMPLATE_INFO (newdecl
))
2138 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2139 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2141 /* Only functions have these fields. */
2142 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2144 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2145 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2146 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2147 && DECL_HIDDEN_FRIEND_P (olddecl
)
2148 && newdecl_is_friend
);
2149 DECL_BEFRIENDING_CLASSES (newdecl
)
2150 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2151 DECL_BEFRIENDING_CLASSES (olddecl
));
2152 /* DECL_THUNKS is only valid for virtual functions,
2153 otherwise it is a DECL_FRIEND_CONTEXT. */
2154 if (DECL_VIRTUAL_P (newdecl
))
2155 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2157 /* Only variables have this field. */
2158 else if (VAR_P (newdecl
)
2159 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2160 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2163 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2167 /* Merge parameter attributes. */
2168 tree oldarg
, newarg
;
2169 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2170 newarg
= DECL_ARGUMENTS(newdecl
);
2172 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2173 DECL_ATTRIBUTES (newarg
)
2174 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2175 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2178 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2179 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2181 /* If newdecl is not a specialization, then it is not a
2182 template-related function at all. And that means that we
2183 should have exited above, returning 0. */
2184 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2186 if (DECL_ODR_USED (olddecl
))
2187 /* From [temp.expl.spec]:
2189 If a template, a member template or the member of a class
2190 template is explicitly specialized then that
2191 specialization shall be declared before the first use of
2192 that specialization that would cause an implicit
2193 instantiation to take place, in every translation unit in
2194 which such a use occurs. */
2195 error ("explicit specialization of %qD after first use",
2198 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2200 /* Don't propagate visibility from the template to the
2201 specialization here. We'll do that in determine_visibility if
2203 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2205 /* [temp.expl.spec/14] We don't inline explicit specialization
2206 just because the primary template says so. */
2208 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2209 the always_inline attribute. */
2210 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2211 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2213 if (DECL_DECLARED_INLINE_P (newdecl
))
2214 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2216 DECL_ATTRIBUTES (newdecl
)
2217 = remove_attribute ("always_inline",
2218 DECL_ATTRIBUTES (newdecl
));
2221 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2223 /* Never inline re-defined extern inline functions.
2224 FIXME: this could be better handled by keeping both
2225 function as separate declarations. */
2226 DECL_UNINLINABLE (newdecl
) = 1;
2230 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2231 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2233 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2235 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2236 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2238 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2239 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2240 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2241 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2244 /* Preserve abstractness on cloned [cd]tors. */
2245 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2247 /* Update newdecl's parms to point at olddecl. */
2248 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2249 parm
= DECL_CHAIN (parm
))
2250 DECL_CONTEXT (parm
) = olddecl
;
2254 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2255 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2256 COPY_DECL_RTL (newdecl
, olddecl
);
2258 if (! types_match
|| new_defines_function
)
2260 /* These need to be copied so that the names are available.
2261 Note that if the types do match, we'll preserve inline
2262 info and other bits, but if not, we won't. */
2263 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2264 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2266 /* If redeclaring a builtin function, it stays built in
2267 if newdecl is a gnu_inline definition, or if newdecl is just
2269 if (DECL_BUILT_IN (olddecl
)
2270 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2272 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2273 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2274 /* If we're keeping the built-in definition, keep the rtl,
2275 regardless of declaration matches. */
2276 COPY_DECL_RTL (olddecl
, newdecl
);
2277 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2279 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2282 /* If a compatible prototype of these builtin functions
2283 is seen, assume the runtime implements it with the
2284 expected semantics. */
2285 case BUILT_IN_STPCPY
:
2286 if (builtin_decl_explicit_p (fncode
))
2287 set_builtin_decl_implicit_p (fncode
, true);
2294 if (new_defines_function
)
2295 /* If defining a function declared with other language
2296 linkage, use the previously declared language linkage. */
2297 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2298 else if (types_match
)
2300 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2301 /* Don't clear out the arguments if we're just redeclaring a
2303 if (DECL_ARGUMENTS (olddecl
))
2304 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2307 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2308 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2310 /* Now preserve various other info from the definition. */
2311 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2312 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2313 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2314 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2316 /* Warn about conflicting visibility specifications. */
2317 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2318 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2319 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2321 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2322 "%qD: visibility attribute ignored because it "
2323 "conflicts with previous declaration", newdecl
))
2324 inform (DECL_SOURCE_LOCATION (olddecl
),
2325 "previous declaration of %qD", olddecl
);
2327 /* Choose the declaration which specified visibility. */
2328 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2330 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2331 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2333 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2334 so keep this behavior. */
2335 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2337 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2338 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2340 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2341 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2343 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2344 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2346 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2347 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2348 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2350 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2351 with that from NEWDECL below. */
2352 if (DECL_LANG_SPECIFIC (olddecl
))
2354 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2355 != DECL_LANG_SPECIFIC (newdecl
));
2356 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2359 /* Merge the USED information. */
2360 if (TREE_USED (olddecl
))
2361 TREE_USED (newdecl
) = 1;
2362 else if (TREE_USED (newdecl
))
2363 TREE_USED (olddecl
) = 1;
2364 if (VAR_P (newdecl
))
2366 if (DECL_READ_P (olddecl
))
2367 DECL_READ_P (newdecl
) = 1;
2368 else if (DECL_READ_P (newdecl
))
2369 DECL_READ_P (olddecl
) = 1;
2371 if (DECL_PRESERVE_P (olddecl
))
2372 DECL_PRESERVE_P (newdecl
) = 1;
2373 else if (DECL_PRESERVE_P (newdecl
))
2374 DECL_PRESERVE_P (olddecl
) = 1;
2376 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2377 to olddecl and deleted. */
2378 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2379 && DECL_FUNCTION_VERSIONED (olddecl
))
2381 /* Set the flag for newdecl so that it gets copied to olddecl. */
2382 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2383 /* newdecl will be purged after copying to olddecl and is no longer
2385 delete_function_version (newdecl
);
2388 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2391 struct symtab_node
*snode
= symtab_get_node (olddecl
);
2393 function_size
= sizeof (struct tree_decl_common
);
2395 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2396 (char *) newdecl
+ sizeof (struct tree_common
),
2397 function_size
- sizeof (struct tree_common
));
2399 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2400 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2401 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2403 /* Preserve symtab node mapping. */
2404 olddecl
->decl_with_vis
.symtab_node
= snode
;
2406 if (new_template_info
)
2407 /* If newdecl is a template instantiation, it is possible that
2408 the following sequence of events has occurred:
2410 o A friend function was declared in a class template. The
2411 class template was instantiated.
2413 o The instantiation of the friend declaration was
2414 recorded on the instantiation list, and is newdecl.
2416 o Later, however, instantiate_class_template called pushdecl
2417 on the newdecl to perform name injection. But, pushdecl in
2418 turn called duplicate_decls when it discovered that another
2419 declaration of a global function with the same name already
2422 o Here, in duplicate_decls, we decided to clobber newdecl.
2424 If we're going to do that, we'd better make sure that
2425 olddecl, and not newdecl, is on the list of
2426 instantiations so that if we try to do the instantiation
2427 again we won't get the clobbered declaration. */
2428 reregister_specialization (newdecl
,
2434 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2436 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2437 (char *) newdecl
+ sizeof (struct tree_common
),
2438 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2439 switch (TREE_CODE (olddecl
))
2449 struct symtab_node
*snode
= NULL
;
2451 if (TREE_CODE (olddecl
) == VAR_DECL
2452 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
) || DECL_EXTERNAL (olddecl
)))
2453 snode
= symtab_get_node (olddecl
);
2454 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2455 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2456 size
- sizeof (struct tree_decl_common
)
2457 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2458 if (TREE_CODE (olddecl
) == VAR_DECL
)
2459 olddecl
->decl_with_vis
.symtab_node
= snode
;
2463 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2464 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2465 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2466 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2470 DECL_UID (olddecl
) = olddecl_uid
;
2472 DECL_FRIEND_P (olddecl
) = 1;
2475 DECL_ANTICIPATED (olddecl
) = 1;
2476 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2479 /* NEWDECL contains the merged attribute lists.
2480 Update OLDDECL to be the same. */
2481 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2483 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2484 so that encode_section_info has a chance to look at the new decl
2485 flags and attributes. */
2486 if (DECL_RTL_SET_P (olddecl
)
2487 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2489 && TREE_STATIC (olddecl
))))
2490 make_decl_rtl (olddecl
);
2492 /* The NEWDECL will no longer be needed. Because every out-of-class
2493 declaration of a member results in a call to duplicate_decls,
2494 freeing these nodes represents in a significant savings.
2496 Before releasing the node, be sore to remove function from symbol
2497 table that might have been inserted there to record comdat group.
2498 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2499 structure is shared in between newdecl and oldecl. */
2500 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2501 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2502 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2503 || TREE_CODE (newdecl
) == VAR_DECL
)
2505 struct symtab_node
*snode
= symtab_get_node (newdecl
);
2507 symtab_remove_node (snode
);
2514 /* Return zero if the declaration NEWDECL is valid
2515 when the declaration OLDDECL (assumed to be for the same name)
2516 has already been seen.
2517 Otherwise return an error message format string with a %s
2518 where the identifier should go. */
2521 redeclaration_error_message (tree newdecl
, tree olddecl
)
2523 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2525 /* Because C++ can put things into name space for free,
2526 constructs like "typedef struct foo { ... } foo"
2527 would look like an erroneous redeclaration. */
2528 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2531 return G_("redefinition of %q#D");
2533 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2535 /* If this is a pure function, its olddecl will actually be
2536 the original initialization to `0' (which we force to call
2537 abort()). Don't complain about redefinition in this case. */
2538 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2539 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2542 /* If both functions come from different namespaces, this is not
2543 a redeclaration - this is a conflict with a used function. */
2544 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2545 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2546 && ! decls_match (olddecl
, newdecl
))
2547 return G_("%qD conflicts with used function");
2549 /* We'll complain about linkage mismatches in
2550 warn_extern_redeclared_static. */
2552 /* Defining the same name twice is no good. */
2553 if (DECL_INITIAL (olddecl
) != NULL_TREE
2554 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2556 if (DECL_NAME (olddecl
) == NULL_TREE
)
2557 return G_("%q#D not declared in class");
2558 else if (!GNU_INLINE_P (olddecl
)
2559 || GNU_INLINE_P (newdecl
))
2560 return G_("redefinition of %q#D");
2563 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2565 bool olda
= GNU_INLINE_P (olddecl
);
2566 bool newa
= GNU_INLINE_P (newdecl
);
2571 return G_("%q+D redeclared inline with "
2572 "%<gnu_inline%> attribute");
2574 return G_("%q+D redeclared inline without "
2575 "%<gnu_inline%> attribute");
2579 check_abi_tag_redeclaration
2580 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2581 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2585 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2589 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2591 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2592 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2593 return G_("redefinition of %q#D");
2597 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2598 || (DECL_TEMPLATE_RESULT (newdecl
)
2599 == DECL_TEMPLATE_RESULT (olddecl
)))
2602 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2603 if (DECL_TEMPLATE_INFO (nt
))
2604 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2605 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2606 if (DECL_TEMPLATE_INFO (ot
))
2607 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2608 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2609 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2610 return G_("redefinition of %q#D");
2612 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2614 bool olda
= GNU_INLINE_P (ot
);
2615 bool newa
= GNU_INLINE_P (nt
);
2620 return G_("%q+D redeclared inline with "
2621 "%<gnu_inline%> attribute");
2623 return G_("%q+D redeclared inline without "
2624 "%<gnu_inline%> attribute");
2628 /* Core issue #226 (C++0x):
2630 If a friend function template declaration specifies a
2631 default template-argument, that declaration shall be a
2632 definition and shall be the only declaration of the
2633 function template in the translation unit. */
2634 if ((cxx_dialect
!= cxx98
)
2635 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2636 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2637 /*is_primary=*/true,
2638 /*is_partial=*/false,
2639 /*is_friend_decl=*/2))
2640 return G_("redeclaration of friend %q#D "
2641 "may not have default template arguments");
2645 else if (VAR_P (newdecl
)
2646 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2647 && (! DECL_LANG_SPECIFIC (olddecl
)
2648 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2649 || DECL_THREAD_LOCAL_P (newdecl
)))
2651 /* Only variables can be thread-local, and all declarations must
2652 agree on this property. */
2653 if (DECL_THREAD_LOCAL_P (newdecl
))
2654 return G_("thread-local declaration of %q#D follows "
2655 "non-thread-local declaration");
2657 return G_("non-thread-local declaration of %q#D follows "
2658 "thread-local declaration");
2660 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2662 /* The objects have been declared at namespace scope. If either
2663 is a member of an anonymous union, then this is an invalid
2664 redeclaration. For example:
2670 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2671 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2672 return G_("redeclaration of %q#D");
2673 /* If at least one declaration is a reference, there is no
2674 conflict. For example:
2680 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2682 /* Reject two definitions. */
2683 return G_("redefinition of %q#D");
2687 /* Objects declared with block scope: */
2688 /* Reject two definitions, and reject a definition
2689 together with an external reference. */
2690 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2691 return G_("redeclaration of %q#D");
2696 /* Hash and equality functions for the named_label table. */
2699 named_label_entry_hash (const void *data
)
2701 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2702 return DECL_UID (ent
->label_decl
);
2706 named_label_entry_eq (const void *a
, const void *b
)
2708 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2709 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2710 return ent_a
->label_decl
== ent_b
->label_decl
;
2713 /* Create a new label, named ID. */
2716 make_label_decl (tree id
, int local_p
)
2718 struct named_label_entry
*ent
;
2722 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2724 DECL_CONTEXT (decl
) = current_function_decl
;
2725 DECL_MODE (decl
) = VOIDmode
;
2726 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2728 /* Say where one reference is to the label, for the sake of the
2729 error if it is not defined. */
2730 DECL_SOURCE_LOCATION (decl
) = input_location
;
2732 /* Record the fact that this identifier is bound to this label. */
2733 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2735 /* Create the label htab for the function on demand. */
2737 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2738 named_label_entry_eq
, NULL
);
2740 /* Record this label on the list of labels used in this function.
2741 We do this before calling make_label_decl so that we get the
2742 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2743 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2744 ent
->label_decl
= decl
;
2746 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2747 gcc_assert (*slot
== NULL
);
2753 /* Look for a label named ID in the current function. If one cannot
2754 be found, create one. (We keep track of used, but undefined,
2755 labels, and complain about them at the end of a function.) */
2758 lookup_label_1 (tree id
)
2762 /* You can't use labels at global scope. */
2763 if (current_function_decl
== NULL_TREE
)
2765 error ("label %qE referenced outside of any function", id
);
2769 /* See if we've already got this label. */
2770 decl
= IDENTIFIER_LABEL_VALUE (id
);
2771 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2774 decl
= make_label_decl (id
, /*local_p=*/0);
2778 /* Wrapper for lookup_label_1. */
2781 lookup_label (tree id
)
2784 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2785 ret
= lookup_label_1 (id
);
2786 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2790 /* Declare a local label named ID. */
2793 declare_local_label (tree id
)
2796 cp_label_binding bind
;
2798 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2799 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2800 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2802 decl
= make_label_decl (id
, /*local_p=*/1);
2804 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2809 /* Returns nonzero if it is ill-formed to jump past the declaration of
2810 DECL. Returns 2 if it's also a real problem. */
2813 decl_jump_unsafe (tree decl
)
2815 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2816 with automatic storage duration is not in scope to a point where it is
2817 in scope is ill-formed unless the variable has scalar type, class type
2818 with a trivial default constructor and a trivial destructor, a
2819 cv-qualified version of one of these types, or an array of one of the
2820 preceding types and is declared without an initializer (8.5). */
2821 tree type
= TREE_TYPE (decl
);
2823 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2824 || type
== error_mark_node
)
2827 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2828 || variably_modified_type_p (type
, NULL_TREE
))
2831 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2837 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2840 identify_goto (tree decl
, const location_t
*locus
)
2843 permerror (input_location
, "jump to label %qD", decl
);
2845 permerror (input_location
, "jump to case label");
2847 permerror (*locus
, " from here");
2850 /* Check that a single previously seen jump to a newly defined label
2851 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2852 the jump context; NAMES are the names in scope in LEVEL at the jump
2853 context; LOCUS is the source position of the jump or 0. Returns
2854 true if all is well. */
2857 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2858 bool exited_omp
, const location_t
*locus
)
2860 cp_binding_level
*b
;
2861 bool identified
= false, saw_eh
= false, saw_omp
= false;
2865 identify_goto (decl
, locus
);
2866 error (" exits OpenMP structured block");
2867 identified
= saw_omp
= true;
2870 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2872 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2874 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2875 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2876 : TREE_CHAIN (new_decls
)))
2878 int problem
= decl_jump_unsafe (new_decls
);
2884 identify_goto (decl
, locus
);
2888 error (" crosses initialization of %q+#D", new_decls
);
2890 permerror (input_location
, " enters scope of %q+#D which has "
2891 "non-trivial destructor", new_decls
);
2896 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2900 identify_goto (decl
, locus
);
2903 if (b
->kind
== sk_try
)
2904 error (" enters try block");
2906 error (" enters catch block");
2909 if (b
->kind
== sk_omp
&& !saw_omp
)
2913 identify_goto (decl
, locus
);
2916 error (" enters OpenMP structured block");
2925 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2927 check_previous_goto_1 (decl
, use
->binding_level
,
2928 use
->names_in_scope
, use
->in_omp_scope
,
2929 &use
->o_goto_locus
);
2933 check_switch_goto (cp_binding_level
* level
)
2935 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2938 /* Check that a new jump to a label DECL is OK. Called by
2939 finish_goto_stmt. */
2942 check_goto (tree decl
)
2944 struct named_label_entry
*ent
, dummy
;
2945 bool saw_catch
= false, identified
= false;
2949 /* We can't know where a computed goto is jumping.
2950 So we assume that it's OK. */
2951 if (TREE_CODE (decl
) != LABEL_DECL
)
2954 /* We didn't record any information about this label when we created it,
2955 and there's not much point since it's trivial to analyze as a return. */
2956 if (decl
== cdtor_label
)
2959 dummy
.label_decl
= decl
;
2960 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2961 gcc_assert (ent
!= NULL
);
2963 /* If the label hasn't been defined yet, defer checking. */
2964 if (! DECL_INITIAL (decl
))
2966 struct named_label_use_entry
*new_use
;
2968 /* Don't bother creating another use if the last goto had the
2969 same data, and will therefore create the same set of errors. */
2971 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2974 new_use
= ggc_alloc
<named_label_use_entry
> ();
2975 new_use
->binding_level
= current_binding_level
;
2976 new_use
->names_in_scope
= current_binding_level
->names
;
2977 new_use
->o_goto_locus
= input_location
;
2978 new_use
->in_omp_scope
= false;
2980 new_use
->next
= ent
->uses
;
2981 ent
->uses
= new_use
;
2985 if (ent
->in_try_scope
|| ent
->in_catch_scope
2986 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
2988 permerror (input_location
, "jump to label %q+D", decl
);
2989 permerror (input_location
, " from here");
2993 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
2995 int u
= decl_jump_unsafe (bad
);
2997 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2999 /* Can't skip init of __exception_info. */
3000 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3004 error (" skips initialization of %q+#D", bad
);
3006 permerror (input_location
, " enters scope of %q+#D which has "
3007 "non-trivial destructor", bad
);
3010 if (ent
->in_try_scope
)
3011 error (" enters try block");
3012 else if (ent
->in_catch_scope
&& !saw_catch
)
3013 error (" enters catch block");
3015 if (ent
->in_omp_scope
)
3016 error (" enters OpenMP structured block");
3017 else if (flag_openmp
)
3019 cp_binding_level
*b
;
3020 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3022 if (b
== ent
->binding_level
)
3024 if (b
->kind
== sk_omp
)
3028 permerror (input_location
, "jump to label %q+D", decl
);
3029 permerror (input_location
, " from here");
3032 error (" exits OpenMP structured block");
3039 /* Check that a return is ok wrt OpenMP structured blocks.
3040 Called by finish_return_stmt. Returns true if all is well. */
3043 check_omp_return (void)
3045 cp_binding_level
*b
;
3046 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3047 if (b
->kind
== sk_omp
)
3049 error ("invalid exit from OpenMP structured block");
3052 else if (b
->kind
== sk_function_parms
)
3057 /* Define a label, specifying the location in the source file.
3058 Return the LABEL_DECL node for the label. */
3061 define_label_1 (location_t location
, tree name
)
3063 struct named_label_entry
*ent
, dummy
;
3064 cp_binding_level
*p
;
3067 decl
= lookup_label (name
);
3069 dummy
.label_decl
= decl
;
3070 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
3071 gcc_assert (ent
!= NULL
);
3073 /* After labels, make any new cleanups in the function go into their
3074 own new (temporary) binding contour. */
3075 for (p
= current_binding_level
;
3076 p
->kind
!= sk_function_parms
;
3078 p
->more_cleanups_ok
= 0;
3080 if (name
== get_identifier ("wchar_t"))
3081 permerror (input_location
, "label named wchar_t");
3083 if (DECL_INITIAL (decl
) != NULL_TREE
)
3085 error ("duplicate label %qD", decl
);
3086 return error_mark_node
;
3090 struct named_label_use_entry
*use
;
3092 /* Mark label as having been defined. */
3093 DECL_INITIAL (decl
) = error_mark_node
;
3094 /* Say where in the source. */
3095 DECL_SOURCE_LOCATION (decl
) = location
;
3097 ent
->binding_level
= current_binding_level
;
3098 ent
->names_in_scope
= current_binding_level
->names
;
3100 for (use
= ent
->uses
; use
; use
= use
->next
)
3101 check_previous_goto (decl
, use
);
3108 /* Wrapper for define_label_1. */
3111 define_label (location_t location
, tree name
)
3114 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3115 ret
= define_label_1 (location
, name
);
3116 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3123 cp_binding_level
*level
;
3124 struct cp_switch
*next
;
3125 /* The SWITCH_STMT being built. */
3127 /* A splay-tree mapping the low element of a case range to the high
3128 element, or NULL_TREE if there is no high element. Used to
3129 determine whether or not a new case label duplicates an old case
3130 label. We need a tree, rather than simply a hash table, because
3131 of the GNU case range extension. */
3135 /* A stack of the currently active switch statements. The innermost
3136 switch statement is on the top of the stack. There is no need to
3137 mark the stack for garbage collection because it is only active
3138 during the processing of the body of a function, and we never
3139 collect at that point. */
3141 static struct cp_switch
*switch_stack
;
3143 /* Called right after a switch-statement condition is parsed.
3144 SWITCH_STMT is the switch statement being parsed. */
3147 push_switch (tree switch_stmt
)
3149 struct cp_switch
*p
= XNEW (struct cp_switch
);
3150 p
->level
= current_binding_level
;
3151 p
->next
= switch_stack
;
3152 p
->switch_stmt
= switch_stmt
;
3153 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3160 struct cp_switch
*cs
= switch_stack
;
3161 location_t switch_location
;
3163 /* Emit warnings as needed. */
3164 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3165 if (!processing_template_decl
)
3166 c_do_switch_warnings (cs
->cases
, switch_location
,
3167 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3168 SWITCH_STMT_COND (cs
->switch_stmt
));
3170 splay_tree_delete (cs
->cases
);
3171 switch_stack
= switch_stack
->next
;
3175 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3176 condition. Note that if TYPE and VALUE are already integral we don't
3177 really do the conversion because the language-independent
3178 warning/optimization code will work better that way. */
3181 case_conversion (tree type
, tree value
)
3183 if (value
== NULL_TREE
)
3186 if (cxx_dialect
>= cxx11
3187 && (SCOPED_ENUM_P (type
)
3188 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3190 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3191 type
= type_promotes_to (type
);
3192 value
= (perform_implicit_conversion_flags
3193 (type
, value
, tf_warning_or_error
,
3194 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3196 return cxx_constant_value (value
);
3199 /* Note that we've seen a definition of a case label, and complain if this
3200 is a bad place for one. */
3203 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3206 cp_binding_level
*p
;
3209 if (processing_template_decl
)
3213 /* For templates, just add the case label; we'll do semantic
3214 analysis at instantiation-time. */
3215 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3216 return add_stmt (build_case_label (low_value
, high_value
, label
));
3219 /* Find the condition on which this switch statement depends. */
3220 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3221 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3222 cond
= TREE_VALUE (cond
);
3224 if (!check_switch_goto (switch_stack
->level
))
3225 return error_mark_node
;
3227 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3229 low_value
= case_conversion (type
, low_value
);
3230 high_value
= case_conversion (type
, high_value
);
3232 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3233 low_value
, high_value
);
3235 /* After labels, make any new cleanups in the function go into their
3236 own new (temporary) binding contour. */
3237 for (p
= current_binding_level
;
3238 p
->kind
!= sk_function_parms
;
3240 p
->more_cleanups_ok
= 0;
3245 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3248 typename_hash (const void* k
)
3251 const_tree
const t
= (const_tree
) k
;
3253 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3254 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3259 typedef struct typename_info
{
3267 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3268 really of type `typename_info*' */
3271 typename_compare (const void * k1
, const void * k2
)
3273 const_tree
const t1
= (const_tree
) k1
;
3274 const typename_info
*const t2
= (const typename_info
*) k2
;
3276 return (TYPE_IDENTIFIER (t1
) == t2
->name
3277 && TYPE_CONTEXT (t1
) == t2
->scope
3278 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3279 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3280 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3283 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3284 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3286 Returns the new TYPENAME_TYPE. */
3288 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3291 build_typename_type (tree context
, tree name
, tree fullname
,
3292 enum tag_types tag_type
)
3300 if (typename_htab
== NULL
)
3301 typename_htab
= htab_create_ggc (61, &typename_hash
,
3302 &typename_compare
, NULL
);
3304 ti
.scope
= FROB_CONTEXT (context
);
3306 ti
.template_id
= fullname
;
3307 ti
.enum_p
= tag_type
== enum_type
;
3308 ti
.class_p
= (tag_type
== class_type
3309 || tag_type
== record_type
3310 || tag_type
== union_type
);
3311 hash
= (htab_hash_pointer (ti
.scope
)
3312 ^ htab_hash_pointer (ti
.name
));
3314 /* See if we already have this type. */
3315 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3320 /* Build the TYPENAME_TYPE. */
3321 t
= cxx_make_type (TYPENAME_TYPE
);
3322 TYPE_CONTEXT (t
) = ti
.scope
;
3323 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3324 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3325 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3327 /* Build the corresponding TYPE_DECL. */
3328 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3329 TYPE_NAME (TREE_TYPE (d
)) = d
;
3330 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3331 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3332 DECL_ARTIFICIAL (d
) = 1;
3334 /* Store it in the hash table. */
3337 /* TYPENAME_TYPEs must always be compared structurally, because
3338 they may or may not resolve down to another type depending on
3339 the currently open classes. */
3340 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3346 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3347 provided to name the type. Returns an appropriate type, unless an
3348 error occurs, in which case error_mark_node is returned. If we
3349 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3350 return that, rather than the _TYPE it corresponds to, in other
3351 cases we look through the type decl. If TF_ERROR is set, complain
3352 about errors, otherwise be quiet. */
3355 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3356 tsubst_flags_t complain
)
3362 if (name
== error_mark_node
3363 || context
== NULL_TREE
3364 || context
== error_mark_node
)
3365 return error_mark_node
;
3369 if (!(TYPE_LANG_SPECIFIC (name
)
3370 && (CLASSTYPE_IS_TEMPLATE (name
)
3371 || CLASSTYPE_USE_TEMPLATE (name
))))
3372 name
= TYPE_IDENTIFIER (name
);
3374 /* Create a TEMPLATE_ID_EXPR for the type. */
3375 name
= build_nt (TEMPLATE_ID_EXPR
,
3376 CLASSTYPE_TI_TEMPLATE (name
),
3377 CLASSTYPE_TI_ARGS (name
));
3379 else if (TREE_CODE (name
) == TYPE_DECL
)
3380 name
= DECL_NAME (name
);
3384 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3386 name
= TREE_OPERAND (name
, 0);
3387 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3388 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3389 else if (TREE_CODE (name
) == OVERLOAD
)
3391 if (complain
& tf_error
)
3392 error ("%qD is not a type", name
);
3393 return error_mark_node
;
3396 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3398 if (complain
& tf_error
)
3399 error ("%qD used without template parameters", name
);
3400 return error_mark_node
;
3402 gcc_assert (identifier_p (name
));
3403 gcc_assert (TYPE_P (context
));
3405 if (!MAYBE_CLASS_TYPE_P (context
))
3407 if (complain
& tf_error
)
3408 error ("%q#T is not a class", context
);
3409 return error_mark_node
;
3412 /* When the CONTEXT is a dependent type, NAME could refer to a
3413 dependent base class of CONTEXT. But look inside it anyway
3414 if CONTEXT is a currently open scope, in case it refers to a
3415 member of the current instantiation or a non-dependent base;
3416 lookup will stop when we hit a dependent base. */
3417 if (!dependent_scope_p (context
))
3418 /* We should only set WANT_TYPE when we're a nested typename type.
3419 Then we can give better diagnostics if we find a non-type. */
3420 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3424 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3425 return build_typename_type (context
, name
, fullname
, tag_type
);
3427 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3431 if (complain
& tf_error
)
3432 error (want_template
? G_("no class template named %q#T in %q#T")
3433 : G_("no type named %q#T in %q#T"), name
, context
);
3434 return error_mark_node
;
3437 /* Pull out the template from an injected-class-name (or multiple). */
3439 t
= maybe_get_template_decl_from_type_decl (t
);
3441 if (TREE_CODE (t
) == TREE_LIST
)
3443 if (complain
& tf_error
)
3445 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3446 print_candidates (t
);
3448 return error_mark_node
;
3451 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3453 if (complain
& tf_error
)
3454 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3456 return error_mark_node
;
3458 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3460 if (complain
& tf_error
)
3461 error ("%<typename %T::%D%> names %q#T, which is not a type",
3463 return error_mark_node
;
3466 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3467 return error_mark_node
;
3469 /* If we are currently parsing a template and if T is a typedef accessed
3470 through CONTEXT then we need to remember and check access of T at
3471 template instantiation time. */
3472 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3475 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3477 /*entering_scope=*/0,
3478 tf_warning_or_error
| tf_user
);
3480 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3483 maybe_record_typedef_use (t
);
3488 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3489 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3490 in which case error_mark_node is returned.
3492 If PARM_LIST is non-NULL, also make sure that the template parameter
3493 list of TEMPLATE_DECL matches.
3495 If COMPLAIN zero, don't complain about any errors that occur. */
3498 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3499 tsubst_flags_t complain
)
3505 name
= TYPE_IDENTIFIER (name
);
3506 else if (DECL_P (name
))
3507 name
= DECL_NAME (name
);
3508 gcc_assert (identifier_p (name
));
3510 if (!dependent_type_p (context
)
3511 || currently_open_class (context
))
3513 tree tmpl
= NULL_TREE
;
3515 if (MAYBE_CLASS_TYPE_P (context
))
3516 tmpl
= lookup_field (context
, name
, 0, false);
3518 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3519 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3521 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3523 if (complain
& tf_error
)
3524 error ("no class template named %q#T in %q#T", name
, context
);
3525 return error_mark_node
;
3529 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3531 if (complain
& tf_error
)
3533 error ("template parameters do not match template %qD", tmpl
);
3534 inform (DECL_SOURCE_LOCATION (tmpl
),
3535 "%qD declared here", tmpl
);
3537 return error_mark_node
;
3540 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3542 return error_mark_node
;
3547 /* Build the UNBOUND_CLASS_TEMPLATE. */
3548 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3549 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3550 TREE_TYPE (t
) = NULL_TREE
;
3551 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3553 /* Build the corresponding TEMPLATE_DECL. */
3554 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3555 TYPE_NAME (TREE_TYPE (d
)) = d
;
3556 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3557 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3558 DECL_ARTIFICIAL (d
) = 1;
3559 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3566 /* Push the declarations of builtin types into the namespace.
3567 RID_INDEX is the index of the builtin type in the array
3568 RID_POINTERS. NAME is the name used when looking up the builtin
3569 type. TYPE is the _TYPE node for the builtin type. */
3572 record_builtin_type (enum rid rid_index
,
3576 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3577 tree tdecl
= NULL_TREE
;
3579 if ((int) rid_index
< (int) RID_MAX
)
3580 rname
= ridpointers
[(int) rid_index
];
3582 tname
= get_identifier (name
);
3584 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3585 eliminated. Built-in types should not be looked up name; their
3586 names are keywords that the parser can recognize. However, there
3587 is code in c-common.c that uses identifier_global_value to look
3588 up built-in types by name. */
3591 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3592 DECL_ARTIFICIAL (tdecl
) = 1;
3593 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3599 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3600 DECL_ARTIFICIAL (tdecl
) = 1;
3602 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3605 if (!TYPE_NAME (type
))
3606 TYPE_NAME (type
) = tdecl
;
3609 debug_hooks
->type_decl (tdecl
, 0);
3612 /* Record one of the standard Java types.
3613 * Declare it as having the given NAME.
3614 * If SIZE > 0, it is the size of one of the integral types;
3615 * otherwise it is the negative of the size of one of the other types. */
3618 record_builtin_java_type (const char* name
, int size
)
3623 type
= build_nonstandard_integer_type (size
, 0);
3624 type
= build_distinct_type_copy (type
);
3626 else if (size
> -32)
3629 /* "__java_char" or ""__java_boolean". */
3630 type
= build_nonstandard_integer_type (-size
, 1);
3631 type
= build_distinct_type_copy (type
);
3632 /* Get the signed type cached and attached to the unsigned type,
3633 so it doesn't get garbage-collected at "random" times,
3634 causing potential codegen differences out of different UIDs
3635 and different alias set numbers. */
3636 stype
= build_nonstandard_integer_type (-size
, 0);
3637 stype
= build_distinct_type_copy (stype
);
3638 TREE_CHAIN (type
) = stype
;
3639 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3642 { /* "__java_float" or ""__java_double". */
3643 type
= make_node (REAL_TYPE
);
3644 TYPE_PRECISION (type
) = - size
;
3647 record_builtin_type (RID_MAX
, name
, type
);
3648 decl
= TYPE_NAME (type
);
3650 /* Suppress generate debug symbol entries for these types,
3651 since for normal C++ they are just clutter.
3652 However, push_lang_context undoes this if extern "Java" is seen. */
3653 DECL_IGNORED_P (decl
) = 1;
3655 TYPE_FOR_JAVA (type
) = 1;
3659 /* Push a type into the namespace so that the back ends ignore it. */
3662 record_unknown_type (tree type
, const char* name
)
3664 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3665 TYPE_DECL
, get_identifier (name
), type
));
3666 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3667 DECL_IGNORED_P (decl
) = 1;
3668 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3669 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3670 TYPE_ALIGN (type
) = 1;
3671 TYPE_USER_ALIGN (type
) = 0;
3672 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3675 /* A string for which we should create an IDENTIFIER_NODE at
3678 typedef struct predefined_identifier
3680 /* The name of the identifier. */
3681 const char *const name
;
3682 /* The place where the IDENTIFIER_NODE should be stored. */
3684 /* Nonzero if this is the name of a constructor or destructor. */
3685 const int ctor_or_dtor_p
;
3686 } predefined_identifier
;
3688 /* Create all the predefined identifiers. */
3691 initialize_predefined_identifiers (void)
3693 const predefined_identifier
*pid
;
3695 /* A table of identifiers to create at startup. */
3696 static const predefined_identifier predefined_identifiers
[] = {
3697 { "C++", &lang_name_cplusplus
, 0 },
3698 { "C", &lang_name_c
, 0 },
3699 { "Java", &lang_name_java
, 0 },
3700 /* Some of these names have a trailing space so that it is
3701 impossible for them to conflict with names written by users. */
3702 { "__ct ", &ctor_identifier
, 1 },
3703 { "__base_ctor ", &base_ctor_identifier
, 1 },
3704 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3705 { "__dt ", &dtor_identifier
, 1 },
3706 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3707 { "__base_dtor ", &base_dtor_identifier
, 1 },
3708 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3709 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3710 { "nelts", &nelts_identifier
, 0 },
3711 { THIS_NAME
, &this_identifier
, 0 },
3712 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3713 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3714 { "_vptr", &vptr_identifier
, 0 },
3715 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3716 { "::", &global_scope_name
, 0 },
3717 { "std", &std_identifier
, 0 },
3721 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3723 *pid
->node
= get_identifier (pid
->name
);
3724 if (pid
->ctor_or_dtor_p
)
3725 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3729 /* Create the predefined scalar types of C,
3730 and some nodes representing standard constants (0, 1, (void *)0).
3731 Initialize the global binding level.
3732 Make definitions for built-in primitive functions. */
3735 cxx_init_decl_processing (void)
3738 tree void_ftype_ptr
;
3740 /* Create all the identifiers we need. */
3741 initialize_predefined_identifiers ();
3743 /* Create the global variables. */
3744 push_to_top_level ();
3746 current_function_decl
= NULL_TREE
;
3747 current_binding_level
= NULL
;
3748 /* Enter the global namespace. */
3749 gcc_assert (global_namespace
== NULL_TREE
);
3750 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3752 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3753 TREE_PUBLIC (global_namespace
) = 1;
3754 begin_scope (sk_namespace
, global_namespace
);
3756 if (flag_visibility_ms_compat
)
3757 default_visibility
= VISIBILITY_HIDDEN
;
3760 current_lang_name
= lang_name_c
;
3762 /* Create the `std' namespace. */
3763 push_namespace (std_identifier
);
3764 std_node
= current_namespace
;
3767 c_common_nodes_and_builtins ();
3769 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3770 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3771 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3772 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3773 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3774 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3775 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3776 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3778 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3780 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3781 truthvalue_type_node
= boolean_type_node
;
3782 truthvalue_false_node
= boolean_false_node
;
3783 truthvalue_true_node
= boolean_true_node
;
3785 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3786 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3787 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3790 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3793 delta_type_node
= ptrdiff_type_node
;
3794 vtable_index_type
= ptrdiff_type_node
;
3796 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3797 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3798 void_ftype_ptr
= build_function_type_list (void_type_node
,
3799 ptr_type_node
, NULL_TREE
);
3801 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3803 /* C++ extensions */
3805 unknown_type_node
= make_node (LANG_TYPE
);
3806 record_unknown_type (unknown_type_node
, "unknown type");
3808 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3809 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3811 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3813 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3814 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3816 init_list_type_node
= make_node (LANG_TYPE
);
3817 record_unknown_type (init_list_type_node
, "init list");
3820 /* Make sure we get a unique function type, so we can give
3821 its pointer type a name. (This wins for gdb.) */
3822 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3823 TREE_TYPE (vfunc_type
) = integer_type_node
;
3824 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3825 layout_type (vfunc_type
);
3827 vtable_entry_type
= build_pointer_type (vfunc_type
);
3829 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3832 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3833 layout_type (vtbl_type_node
);
3834 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3835 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3836 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3837 layout_type (vtbl_ptr_type_node
);
3838 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3840 push_namespace (get_identifier ("__cxxabiv1"));
3841 abi_node
= current_namespace
;
3844 global_type_node
= make_node (LANG_TYPE
);
3845 record_unknown_type (global_type_node
, "global type");
3848 current_lang_name
= lang_name_cplusplus
;
3851 tree newattrs
, extvisattr
;
3852 tree newtype
, deltype
;
3853 tree ptr_ftype_sizetype
;
3857 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3858 if (cxx_dialect
== cxx98
)
3861 tree bad_alloc_type_node
;
3862 tree bad_alloc_decl
;
3864 push_namespace (std_identifier
);
3865 bad_alloc_id
= get_identifier ("bad_alloc");
3866 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3867 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3869 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3870 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3874 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3877 new_eh_spec
= noexcept_false_spec
;
3879 /* Ensure attribs.c is initialized. */
3881 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3883 newattrs
= tree_cons (get_identifier ("alloc_size"),
3884 build_tree_list (NULL_TREE
, integer_one_node
),
3886 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3887 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3888 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3889 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3890 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3891 DECL_IS_MALLOC (opnew
) = 1;
3892 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3893 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3894 DECL_IS_MALLOC (opnew
) = 1;
3895 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3896 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3897 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3899 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3900 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3901 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3902 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3903 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3904 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3905 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3906 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3910 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
3911 ECF_NORETURN
| ECF_NOTHROW
);
3913 /* Perform other language dependent initializations. */
3914 init_class_processing ();
3915 init_rtti_processing ();
3916 init_template_processing ();
3918 if (flag_exceptions
)
3919 init_exception_processing ();
3921 if (! supports_one_only ())
3924 make_fname_decl
= cp_make_fname_decl
;
3925 start_fname_decls ();
3927 /* Show we use EH for cleanups. */
3928 if (flag_exceptions
)
3929 using_eh_for_cleanups ();
3932 /* Generate an initializer for a function naming variable from
3933 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3934 filled in with the type of the init. */
3937 cp_fname_init (const char* name
, tree
*type_p
)
3939 tree domain
= NULL_TREE
;
3941 tree init
= NULL_TREE
;
3946 length
= strlen (name
);
3947 domain
= build_index_type (size_int (length
));
3948 init
= build_string (length
+ 1, name
);
3951 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3952 type
= build_cplus_array_type (type
, domain
);
3957 TREE_TYPE (init
) = type
;
3959 init
= error_mark_node
;
3964 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3965 the decl, LOC is the location to give the decl, NAME is the
3966 initialization string and TYPE_DEP indicates whether NAME depended
3967 on the type of the function. We make use of that to detect
3968 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3969 at the point of first use, so we mustn't push the decl now. */
3972 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3974 const char *const name
= (type_dep
&& processing_template_decl
3975 ? NULL
: fname_as_string (type_dep
));
3977 tree init
= cp_fname_init (name
, &type
);
3978 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3981 free (CONST_CAST (char *, name
));
3983 /* As we're using pushdecl_with_scope, we must set the context. */
3984 DECL_CONTEXT (decl
) = current_function_decl
;
3986 TREE_STATIC (decl
) = 1;
3987 TREE_READONLY (decl
) = 1;
3988 DECL_ARTIFICIAL (decl
) = 1;
3990 TREE_USED (decl
) = 1;
3992 if (current_function_decl
)
3994 cp_binding_level
*b
= current_binding_level
;
3995 if (b
->kind
== sk_function_parms
)
3996 return error_mark_node
;
3997 while (b
->level_chain
->kind
!= sk_function_parms
)
3999 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4000 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4001 LOOKUP_ONLYCONVERTING
);
4005 DECL_THIS_STATIC (decl
) = true;
4006 pushdecl_top_level_and_finish (decl
, init
);
4013 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4015 tree id
= DECL_NAME (decl
);
4016 const char *name
= IDENTIFIER_POINTER (id
);
4018 retrofit_lang_decl (decl
);
4020 DECL_ARTIFICIAL (decl
) = 1;
4021 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4022 SET_DECL_LANGUAGE (decl
, lang_c
);
4023 /* Runtime library routines are, by definition, available in an
4024 external shared object. */
4025 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4026 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4028 DECL_CONTEXT (decl
) = context
;
4031 pushdecl_top_level (decl
);
4035 /* A function in the user's namespace should have an explicit
4036 declaration before it is used. Mark the built-in function as
4037 anticipated but not actually declared. */
4038 if (name
[0] != '_' || name
[1] != '_')
4039 DECL_ANTICIPATED (decl
) = 1;
4040 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4042 size_t len
= strlen (name
);
4044 /* Treat __*_chk fortification functions as anticipated as well,
4045 unless they are __builtin_*. */
4046 if (len
> strlen ("___chk")
4047 && memcmp (name
+ len
- strlen ("_chk"),
4048 "_chk", strlen ("_chk") + 1) == 0)
4049 DECL_ANTICIPATED (decl
) = 1;
4056 cxx_builtin_function (tree decl
)
4058 tree id
= DECL_NAME (decl
);
4059 const char *name
= IDENTIFIER_POINTER (id
);
4060 /* All builtins that don't begin with an '_' should additionally
4061 go in the 'std' namespace. */
4064 tree decl2
= copy_node(decl
);
4065 push_namespace (std_identifier
);
4066 builtin_function_1 (decl2
, std_node
, false);
4070 return builtin_function_1 (decl
, NULL_TREE
, false);
4073 /* Like cxx_builtin_function, but guarantee the function is added to the global
4074 scope. This is to allow function specific options to add new machine
4075 dependent builtins when the target ISA changes via attribute((target(...)))
4076 which saves space on program startup if the program does not use non-generic
4080 cxx_builtin_function_ext_scope (tree decl
)
4083 tree id
= DECL_NAME (decl
);
4084 const char *name
= IDENTIFIER_POINTER (id
);
4085 /* All builtins that don't begin with an '_' should additionally
4086 go in the 'std' namespace. */
4089 tree decl2
= copy_node(decl
);
4090 push_namespace (std_identifier
);
4091 builtin_function_1 (decl2
, std_node
, true);
4095 return builtin_function_1 (decl
, NULL_TREE
, true);
4098 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4099 function. Not called directly. */
4102 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4105 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4106 DECL_EXTERNAL (fn
) = 1;
4107 TREE_PUBLIC (fn
) = 1;
4108 DECL_ARTIFICIAL (fn
) = 1;
4109 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4110 SET_DECL_LANGUAGE (fn
, lang_c
);
4111 /* Runtime library routines are, by definition, available in an
4112 external shared object. */
4113 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4114 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4115 set_call_expr_flags (fn
, ecf_flags
);
4119 /* Returns the _DECL for a library function with C++ linkage. */
4122 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4125 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4126 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4127 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4131 /* Like build_library_fn, but takes a C string instead of an
4135 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4137 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4140 /* Like build_cp_library_fn, but takes a C string instead of an
4144 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4146 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4150 /* Like build_library_fn, but also pushes the function so that we will
4151 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4152 may throw exceptions listed in RAISES. */
4155 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4160 type
= build_exception_variant (type
, raises
);
4162 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4163 pushdecl_top_level (fn
);
4167 /* Like build_cp_library_fn, but also pushes the function so that it
4168 will be found by normal lookup. */
4171 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4174 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4179 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4183 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4187 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4189 tree type
= build_function_type (void_type_node
, parmtypes
);
4190 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4193 /* Like push_library_fn, but also note that this function throws
4194 and does not return. Used for __throw_foo and the like. */
4197 push_throw_library_fn (tree name
, tree type
)
4199 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4203 /* When we call finish_struct for an anonymous union, we create
4204 default copy constructors and such. But, an anonymous union
4205 shouldn't have such things; this function undoes the damage to the
4206 anonymous union type T.
4208 (The reason that we create the synthesized methods is that we don't
4209 distinguish `union { int i; }' from `typedef union { int i; } U'.
4210 The first is an anonymous union; the second is just an ordinary
4214 fixup_anonymous_aggr (tree t
)
4218 /* Wipe out memory of synthesized methods. */
4219 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4220 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4221 TYPE_HAS_COPY_CTOR (t
) = 0;
4222 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4223 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4224 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4226 /* Splice the implicitly generated functions out of the TYPE_METHODS
4228 q
= &TYPE_METHODS (t
);
4231 if (DECL_ARTIFICIAL (*q
))
4232 *q
= TREE_CHAIN (*q
);
4234 q
= &DECL_CHAIN (*q
);
4237 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4238 if (TYPE_METHODS (t
))
4240 tree decl
= TYPE_MAIN_DECL (t
);
4242 if (TREE_CODE (t
) != UNION_TYPE
)
4243 error_at (DECL_SOURCE_LOCATION (decl
),
4244 "an anonymous struct cannot have function members");
4246 error_at (DECL_SOURCE_LOCATION (decl
),
4247 "an anonymous union cannot have function members");
4250 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4251 assignment operators (because they cannot have these methods themselves).
4252 For anonymous unions this is already checked because they are not allowed
4253 in any union, otherwise we have to check it. */
4254 if (TREE_CODE (t
) != UNION_TYPE
)
4258 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4259 if (TREE_CODE (field
) == FIELD_DECL
)
4261 type
= TREE_TYPE (field
);
4262 if (CLASS_TYPE_P (type
))
4264 if (TYPE_NEEDS_CONSTRUCTING (type
))
4265 error ("member %q+#D with constructor not allowed "
4266 "in anonymous aggregate", field
);
4267 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4268 error ("member %q+#D with destructor not allowed "
4269 "in anonymous aggregate", field
);
4270 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4271 error ("member %q+#D with copy assignment operator "
4272 "not allowed in anonymous aggregate", field
);
4278 /* Warn for an attribute located at LOCATION that appertains to the
4279 class type CLASS_TYPE that has not been properly placed after its
4280 class-key, in it class-specifier. */
4283 warn_misplaced_attr_for_class_type (source_location location
,
4286 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4288 if (warning_at (location
, OPT_Wattributes
,
4289 "attribute ignored in declaration "
4290 "of %q#T", class_type
))
4292 "attribute for %q#T must follow the %qs keyword",
4293 class_type
, class_key_or_enum_as_string (class_type
));
4296 /* Make sure that a declaration with no declarator is well-formed, i.e.
4297 just declares a tagged type or anonymous union.
4299 Returns the type declared; or NULL_TREE if none. */
4302 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4303 bool explicit_type_instantiation_p
)
4305 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4306 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4307 /* If a class, struct, or enum type is declared by the DECLSPECS
4308 (i.e, if a class-specifier, enum-specifier, or non-typename
4309 elaborated-type-specifier appears in the DECLSPECS),
4310 DECLARED_TYPE is set to the corresponding type. */
4311 tree declared_type
= NULL_TREE
;
4312 bool error_p
= false;
4314 if (declspecs
->multiple_types_p
)
4315 error ("multiple types in one declaration");
4316 else if (declspecs
->redefined_builtin_type
)
4318 if (!in_system_header_at (input_location
))
4319 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4320 "redeclaration of C++ built-in type %qT",
4321 declspecs
->redefined_builtin_type
);
4326 && TYPE_P (declspecs
->type
)
4327 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4328 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4329 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4330 declared_type
= declspecs
->type
;
4331 else if (declspecs
->type
== error_mark_node
)
4333 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4334 permerror (input_location
, "declaration does not declare anything");
4335 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4337 error ("%<auto%> can only be specified for variables "
4338 "or function declarations");
4339 return error_mark_node
;
4341 /* Check for an anonymous union. */
4342 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4343 && TYPE_ANONYMOUS_P (declared_type
))
4345 /* 7/3 In a simple-declaration, the optional init-declarator-list
4346 can be omitted only when declaring a class (clause 9) or
4347 enumeration (7.2), that is, when the decl-specifier-seq contains
4348 either a class-specifier, an elaborated-type-specifier with
4349 a class-key (9.1), or an enum-specifier. In these cases and
4350 whenever a class-specifier or enum-specifier is present in the
4351 decl-specifier-seq, the identifiers in these specifiers are among
4352 the names being declared by the declaration (as class-name,
4353 enum-names, or enumerators, depending on the syntax). In such
4354 cases, and except for the declaration of an unnamed bit-field (9.6),
4355 the decl-specifier-seq shall introduce one or more names into the
4356 program, or shall redeclare a name introduced by a previous
4357 declaration. [Example:
4358 enum { }; // ill-formed
4359 typedef class { }; // ill-formed
4363 error ("missing type-name in typedef-declaration");
4366 /* Anonymous unions are objects, so they can have specifiers. */;
4367 SET_ANON_AGGR_TYPE_P (declared_type
);
4369 if (TREE_CODE (declared_type
) != UNION_TYPE
4370 && !in_system_header_at (input_location
))
4371 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4376 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4377 || decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4378 error ("%qs can only be specified for functions",
4379 decl_spec_seq_has_spec_p (declspecs
, ds_inline
)
4380 ? "inline" : "virtual");
4382 && (!current_class_type
4383 || current_scope () != current_class_type
))
4384 error ("%<friend%> can only be specified inside a class");
4385 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4386 error ("%<explicit%> can only be specified for constructors");
4387 else if (declspecs
->storage_class
)
4388 error ("a storage class can only be specified for objects "
4390 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
)
4391 || decl_spec_seq_has_spec_p (declspecs
, ds_volatile
)
4392 || decl_spec_seq_has_spec_p (declspecs
, ds_restrict
)
4393 || decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4394 error ("qualifiers can only be specified for objects "
4396 else if (saw_typedef
)
4397 warning (0, "%<typedef%> was ignored in this declaration");
4398 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4399 error ("%<constexpr%> cannot be used for type declarations");
4402 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4405 if (!CLASS_TYPE_P (declared_type
)
4406 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4407 /* For a non-template class, use the name location. */
4408 loc
= location_of (declared_type
);
4410 /* For a template class (an explicit instantiation), use the
4411 current location. */
4412 loc
= input_location
;
4414 if (explicit_type_instantiation_p
)
4415 /* [dcl.attr.grammar]/4:
4417 No attribute-specifier-seq shall appertain to an explicit
4420 if (warning_at (loc
, OPT_Wattributes
,
4421 "attribute ignored in explicit instantiation %q#T",
4424 "no attribute can be applied to "
4425 "an explicit instantiation");
4428 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4431 return declared_type
;
4434 /* Called when a declaration is seen that contains no names to declare.
4435 If its type is a reference to a structure, union or enum inherited
4436 from a containing scope, shadow that tag name for the current scope
4437 with a forward reference.
4438 If its type defines a new named structure or union
4439 or defines an enum, it is valid but we need not do anything here.
4440 Otherwise, it is an error.
4442 C++: may have to grok the declspecs to learn about static,
4443 complain for anonymous unions.
4445 Returns the TYPE declared -- or NULL_TREE if none. */
4448 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4450 tree t
= check_tag_decl (declspecs
,
4451 /*explicit_type_instantiation_p=*/false);
4456 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4459 /* This is where the variables in an anonymous union are
4460 declared. An anonymous union declaration looks like:
4462 because there is no declarator after the union, the parser
4463 sends that declaration here. */
4464 if (ANON_AGGR_TYPE_P (t
))
4466 fixup_anonymous_aggr (t
);
4468 if (TYPE_FIELDS (t
))
4470 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4471 declspecs
, NORMAL
, 0, NULL
);
4472 finish_anon_union (decl
);
4479 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4482 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4483 const cp_declarator
*declarator
,
4484 bool is_template_arg
)
4488 enum decl_context context
4489 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4490 attrs
= type_specifiers
->attributes
;
4491 type_specifiers
->attributes
= NULL_TREE
;
4492 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4493 if (attrs
&& type
!= error_mark_node
)
4495 if (CLASS_TYPE_P (type
))
4496 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4497 "outside of definition", type
);
4498 else if (MAYBE_CLASS_TYPE_P (type
))
4499 /* A template type parameter or other dependent type. */
4500 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4501 "type %qT without an associated declaration", type
);
4503 cplus_decl_attributes (&type
, attrs
, 0);
4508 /* Process a DECLARATOR for a function-scope variable declaration,
4509 namespace-scope variable declaration, or function declaration.
4510 (Function definitions go through start_function; class member
4511 declarations appearing in the body of the class go through
4512 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4513 If an error occurs, the error_mark_node is returned instead.
4515 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4516 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4517 for an explicitly defaulted function, or SD_DELETED for an explicitly
4518 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4519 implicitly initialized via a default constructor. ATTRIBUTES and
4520 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4522 The scope represented by the context of the returned DECL is pushed
4523 (if it is not the global namespace) and is assigned to
4524 *PUSHED_SCOPE_P. The caller is then responsible for calling
4525 pop_scope on *PUSHED_SCOPE_P if it is set. */
4528 start_decl (const cp_declarator
*declarator
,
4529 cp_decl_specifier_seq
*declspecs
,
4532 tree prefix_attributes
,
4533 tree
*pushed_scope_p
)
4541 *pushed_scope_p
= NULL_TREE
;
4543 /* An object declared as __attribute__((deprecated)) suppresses
4544 warnings of uses of other deprecated items. */
4545 if (lookup_attribute ("deprecated", attributes
))
4546 deprecated_state
= DEPRECATED_SUPPRESS
;
4548 attributes
= chainon (attributes
, prefix_attributes
);
4550 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4553 deprecated_state
= DEPRECATED_NORMAL
;
4555 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4556 || decl
== error_mark_node
)
4557 return error_mark_node
;
4559 context
= CP_DECL_CONTEXT (decl
);
4560 if (context
!= global_namespace
)
4561 *pushed_scope_p
= push_scope (context
);
4564 /* Is it valid for this decl to have an initializer at all?
4565 If not, set INITIALIZED to zero, which will indirectly
4566 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4567 switch (TREE_CODE (decl
))
4570 error ("typedef %qD is initialized (use decltype instead)", decl
);
4571 return error_mark_node
;
4574 if (initialized
== SD_DELETED
)
4575 /* We'll handle the rest of the semantics later, but we need to
4576 set this now so it's visible to duplicate_decls. */
4577 DECL_DELETED_FN (decl
) = 1;
4586 if (! toplevel_bindings_p ()
4587 && DECL_EXTERNAL (decl
))
4588 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4590 DECL_EXTERNAL (decl
) = 0;
4591 if (toplevel_bindings_p ())
4592 TREE_STATIC (decl
) = 1;
4594 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4596 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4597 record_key_method_defined (decl
);
4599 /* If this is a typedef that names the class for linkage purposes
4600 (7.1.3p8), apply any attributes directly to the type. */
4601 if (TREE_CODE (decl
) == TYPE_DECL
4602 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4603 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4604 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4608 /* Set attributes here so if duplicate decl, will have proper attributes. */
4609 cplus_decl_attributes (&decl
, attributes
, flags
);
4611 /* Dllimported symbols cannot be defined. Static data members (which
4612 can be initialized in-class and dllimported) go through grokfield,
4613 not here, so we don't need to exclude those decls when checking for
4615 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4617 error ("definition of %q#D is marked %<dllimport%>", decl
);
4618 DECL_DLLIMPORT_P (decl
) = 0;
4621 /* If #pragma weak was used, mark the decl weak now. */
4622 if (!processing_template_decl
)
4623 maybe_apply_pragma_weak (decl
);
4625 if (TREE_CODE (decl
) == FUNCTION_DECL
4626 && DECL_DECLARED_INLINE_P (decl
)
4627 && DECL_UNINLINABLE (decl
)
4628 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4629 warning (0, "inline function %q+D given attribute noinline", decl
);
4631 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4635 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4636 if (field
== NULL_TREE
|| !VAR_P (field
))
4637 error ("%q#D is not a static member of %q#T", decl
, context
);
4640 if (DECL_CONTEXT (field
) != context
)
4642 if (!same_type_p (DECL_CONTEXT (field
), context
))
4643 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4644 "to be defined as %<%T::%D%>",
4645 DECL_CONTEXT (field
), DECL_NAME (decl
),
4646 context
, DECL_NAME (decl
));
4647 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4649 /* Static data member are tricky; an in-class initialization
4650 still doesn't provide a definition, so the in-class
4651 declaration will have DECL_EXTERNAL set, but will have an
4652 initialization. Thus, duplicate_decls won't warn
4653 about this situation, and so we check here. */
4654 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4655 error ("duplicate initialization of %qD", decl
);
4656 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4658 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4659 && !DECL_DECLARED_CONSTEXPR_P (field
))
4660 error ("%qD declared %<constexpr%> outside its class", field
);
4665 tree field
= check_classfn (context
, decl
,
4666 (processing_template_decl
4667 > template_class_depth (context
))
4668 ? current_template_parms
4670 if (field
&& field
!= error_mark_node
4671 && duplicate_decls (decl
, field
,
4672 /*newdecl_is_friend=*/false))
4676 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4677 DECL_IN_AGGR_P (decl
) = 0;
4678 /* Do not mark DECL as an explicit specialization if it was not
4679 already marked as an instantiation; a declaration should
4680 never be marked as a specialization unless we know what
4681 template is being specialized. */
4682 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4684 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4686 /* [temp.expl.spec] An explicit specialization of a static data
4687 member of a template is a definition if the declaration
4688 includes an initializer; otherwise, it is a declaration.
4690 We check for processing_specialization so this only applies
4691 to the new specialization syntax. */
4692 if (!initialized
&& processing_specialization
)
4693 DECL_EXTERNAL (decl
) = 1;
4696 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4697 /* Aliases are definitions. */
4699 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4703 was_public
= TREE_PUBLIC (decl
);
4705 /* Enter this declaration into the symbol table. */
4706 decl
= maybe_push_decl (decl
);
4708 if (processing_template_decl
)
4709 decl
= push_template_decl (decl
);
4710 if (decl
== error_mark_node
)
4711 return error_mark_node
;
4714 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4715 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4717 /* This is a const variable with implicit 'static'. Set
4718 DECL_THIS_STATIC so we can tell it from variables that are
4719 !TREE_PUBLIC because of the anonymous namespace. */
4720 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4721 DECL_THIS_STATIC (decl
) = 1;
4724 if (!processing_template_decl
&& VAR_P (decl
))
4725 start_decl_1 (decl
, initialized
);
4730 /* Process the declaration of a variable DECL. INITIALIZED is true
4731 iff DECL is explicitly initialized. (INITIALIZED is false if the
4732 variable is initialized via an implicitly-called constructor.)
4733 This function must be called for ordinary variables (including, for
4734 example, implicit instantiations of templates), but must not be
4735 called for template declarations. */
4738 start_decl_1 (tree decl
, bool initialized
)
4742 bool aggregate_definition_p
;
4744 gcc_assert (!processing_template_decl
);
4746 if (error_operand_p (decl
))
4749 gcc_assert (VAR_P (decl
));
4751 type
= TREE_TYPE (decl
);
4752 complete_p
= COMPLETE_TYPE_P (type
);
4753 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4755 /* If an explicit initializer is present, or if this is a definition
4756 of an aggregate, then we need a complete type at this point.
4757 (Scalars are always complete types, so there is nothing to
4758 check.) This code just sets COMPLETE_P; errors (if necessary)
4759 are issued below. */
4760 if ((initialized
|| aggregate_definition_p
)
4762 && COMPLETE_TYPE_P (complete_type (type
)))
4765 /* We will not yet have set TREE_READONLY on DECL if the type
4766 was "const", but incomplete, before this point. But, now, we
4767 have a complete type, so we can try again. */
4768 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4772 /* Is it valid for this decl to have an initializer at all? */
4774 /* Don't allow initializations for incomplete types except for
4775 arrays which might be completed by the initialization. */
4777 ; /* A complete type is ok. */
4778 else if (type_uses_auto (type
))
4779 ; /* An auto type is ok. */
4780 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4782 error ("variable %q#D has initializer but incomplete type", decl
);
4783 type
= TREE_TYPE (decl
) = error_mark_node
;
4785 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4787 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4788 error ("elements of array %q#D have incomplete type", decl
);
4789 /* else we already gave an error in start_decl. */
4792 else if (aggregate_definition_p
&& !complete_p
)
4794 if (type_uses_auto (type
))
4795 error ("declaration of %q#D has no initializer", decl
);
4797 error ("aggregate %q#D has incomplete type and cannot be defined",
4799 /* Change the type so that assemble_variable will give
4800 DECL an rtl we can live with: (mem (const_int 0)). */
4801 type
= TREE_TYPE (decl
) = error_mark_node
;
4804 /* Create a new scope to hold this declaration if necessary.
4805 Whether or not a new scope is necessary cannot be determined
4806 until after the type has been completed; if the type is a
4807 specialization of a class template it is not until after
4808 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4809 will be set correctly. */
4810 maybe_push_cleanup_level (type
);
4813 /* Handle initialization of references. DECL, TYPE, and INIT have the
4814 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4815 but will be set to a new CLEANUP_STMT if a temporary is created
4816 that must be destroyed subsequently.
4818 Returns an initializer expression to use to initialize DECL, or
4819 NULL if the initialization can be performed statically.
4821 Quotes on semantics can be found in ARM 8.4.3. */
4824 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4826 if (init
== NULL_TREE
)
4828 if ((DECL_LANG_SPECIFIC (decl
) == 0
4829 || DECL_IN_AGGR_P (decl
) == 0)
4830 && ! DECL_THIS_EXTERN (decl
))
4831 error ("%qD declared as reference but not initialized", decl
);
4835 if (TREE_CODE (init
) == TREE_LIST
)
4836 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4837 tf_warning_or_error
);
4839 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4840 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4841 /* Note: default conversion is only called in very special cases. */
4842 init
= decay_conversion (init
, tf_warning_or_error
);
4844 /* Convert INIT to the reference type TYPE. This may involve the
4845 creation of a temporary, whose lifetime must be the same as that
4846 of the reference. If so, a DECL_EXPR for the temporary will be
4847 added just after the DECL_EXPR for DECL. That's why we don't set
4848 DECL_INITIAL for local references (instead assigning to them
4849 explicitly); we need to allow the temporary to be initialized
4851 return initialize_reference (type
, init
, flags
,
4852 tf_warning_or_error
);
4855 /* Designated initializers in arrays are not supported in GNU C++.
4856 The parser cannot detect this error since it does not know whether
4857 a given brace-enclosed initializer is for a class type or for an
4858 array. This function checks that CE does not use a designated
4859 initializer. If it does, an error is issued. Returns true if CE
4860 is valid, i.e., does not have a designated initializer. */
4863 check_array_designated_initializer (constructor_elt
*ce
,
4864 unsigned HOST_WIDE_INT index
)
4866 /* Designated initializers for array elements are not supported. */
4869 /* The parser only allows identifiers as designated
4871 if (ce
->index
== error_mark_node
)
4873 error ("name used in a GNU-style designated "
4874 "initializer for an array");
4877 else if (identifier_p (ce
->index
))
4879 error ("name %qD used in a GNU-style designated "
4880 "initializer for an array", ce
->index
);
4884 ce
->index
= cxx_constant_value (ce
->index
);
4886 if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4888 /* A C99 designator is OK if it matches the current index. */
4889 if (wi::eq_p (ce
->index
, index
))
4892 sorry ("non-trivial designated initializers not supported");
4903 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4904 array until we finish parsing the initializer. If that's the
4905 situation we're in, update DECL accordingly. */
4908 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4910 tree type
= TREE_TYPE (decl
);
4912 if (TREE_CODE (type
) == ARRAY_TYPE
4913 && TYPE_DOMAIN (type
) == NULL_TREE
4914 && TREE_CODE (decl
) != TYPE_DECL
)
4916 /* do_default is really a C-ism to deal with tentative definitions.
4917 But let's leave it here to ease the eventual merge. */
4918 int do_default
= !DECL_EXTERNAL (decl
);
4919 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4922 /* Check that there are no designated initializers in INIT, as
4923 those are not supported in GNU C++, and as the middle-end
4924 will crash if presented with a non-numeric designated
4926 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
4928 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
4929 constructor_elt
*ce
;
4931 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
4932 if (!check_array_designated_initializer (ce
, i
))
4938 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4942 error ("initializer fails to determine size of %qD", decl
);
4944 else if (failure
== 2)
4948 error ("array size missing in %qD", decl
);
4950 /* If a `static' var's size isn't known, make it extern as
4951 well as static, so it does not get allocated. If it's not
4952 `static', then don't mark it extern; finish_incomplete_decl
4953 will give it a default size and it will get allocated. */
4954 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4955 DECL_EXTERNAL (decl
) = 1;
4957 else if (failure
== 3)
4959 error ("zero-size array %qD", decl
);
4963 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4965 relayout_decl (decl
);
4969 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4970 any appropriate error messages regarding the layout. */
4973 layout_var_decl (tree decl
)
4977 type
= TREE_TYPE (decl
);
4978 if (type
== error_mark_node
)
4981 /* If we haven't already laid out this declaration, do so now.
4982 Note that we must not call complete type for an external object
4983 because it's type might involve templates that we are not
4984 supposed to instantiate yet. (And it's perfectly valid to say
4985 `extern X x' for some incomplete type `X'.) */
4986 if (!DECL_EXTERNAL (decl
))
4987 complete_type (type
);
4988 if (!DECL_SIZE (decl
)
4989 && TREE_TYPE (decl
) != error_mark_node
4990 && (COMPLETE_TYPE_P (type
)
4991 || (TREE_CODE (type
) == ARRAY_TYPE
4992 && !TYPE_DOMAIN (type
)
4993 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4994 layout_decl (decl
, 0);
4996 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4998 /* An automatic variable with an incomplete type: that is an error.
4999 Don't talk about array types here, since we took care of that
5000 message in grokdeclarator. */
5001 error ("storage size of %qD isn%'t known", decl
);
5002 TREE_TYPE (decl
) = error_mark_node
;
5005 /* Keep this code around in case we later want to control debug info
5006 based on whether a type is "used". (jason 1999-11-11) */
5008 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5009 /* Let debugger know it should output info for this type. */
5010 note_debug_info_needed (ttype
);
5012 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5013 note_debug_info_needed (DECL_CONTEXT (decl
));
5016 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5017 && DECL_SIZE (decl
) != NULL_TREE
5018 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5020 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5021 constant_expression_warning (DECL_SIZE (decl
));
5024 error ("storage size of %qD isn%'t constant", decl
);
5025 TREE_TYPE (decl
) = error_mark_node
;
5030 /* If a local static variable is declared in an inline function, or if
5031 we have a weak definition, we must endeavor to create only one
5032 instance of the variable at link-time. */
5035 maybe_commonize_var (tree decl
)
5037 /* Static data in a function with comdat linkage also has comdat
5039 if (TREE_STATIC (decl
)
5040 /* Don't mess with __FUNCTION__. */
5041 && ! DECL_ARTIFICIAL (decl
)
5042 && DECL_FUNCTION_SCOPE_P (decl
)
5043 && vague_linkage_p (DECL_CONTEXT (decl
)))
5047 /* With weak symbols, we simply make the variable COMDAT;
5048 that will cause copies in multiple translations units to
5050 comdat_linkage (decl
);
5054 if (DECL_INITIAL (decl
) == NULL_TREE
5055 || DECL_INITIAL (decl
) == error_mark_node
)
5057 /* Without weak symbols, we can use COMMON to merge
5058 uninitialized variables. */
5059 TREE_PUBLIC (decl
) = 1;
5060 DECL_COMMON (decl
) = 1;
5064 /* While for initialized variables, we must use internal
5065 linkage -- which means that multiple copies will not
5067 TREE_PUBLIC (decl
) = 0;
5068 DECL_COMMON (decl
) = 0;
5069 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5070 "sorry: semantics of inline function static "
5071 "data %q#D are wrong (you%'ll wind up "
5072 "with multiple copies)", decl
))
5073 inform (DECL_SOURCE_LOCATION (decl
),
5074 "you can work around this by removing the initializer");
5078 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
5079 /* Set it up again; we might have set DECL_INITIAL since the last
5081 comdat_linkage (decl
);
5084 /* Issue an error message if DECL is an uninitialized const variable. */
5087 check_for_uninitialized_const_var (tree decl
)
5089 tree type
= strip_array_types (TREE_TYPE (decl
));
5091 /* ``Unless explicitly declared extern, a const object does not have
5092 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5095 && TREE_CODE (type
) != REFERENCE_TYPE
5096 && CP_TYPE_CONST_P (type
)
5097 && !DECL_INITIAL (decl
))
5099 tree field
= default_init_uninitialized_part (type
);
5103 permerror (DECL_SOURCE_LOCATION (decl
),
5104 "uninitialized const %qD", decl
);
5106 if (CLASS_TYPE_P (type
))
5108 tree defaulted_ctor
;
5110 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5111 "%q#T has no user-provided default constructor", type
);
5112 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5114 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5115 "constructor is not user-provided because it is "
5116 "explicitly defaulted in the class body");
5117 inform (0, "and the implicitly-defined constructor does not "
5118 "initialize %q+#D", field
);
5123 /* Structure holding the current initializer being processed by reshape_init.
5124 CUR is a pointer to the current element being processed, END is a pointer
5125 after the last element present in the initializer. */
5126 typedef struct reshape_iterator_t
5128 constructor_elt
*cur
;
5129 constructor_elt
*end
;
5132 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5134 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5135 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5136 initialized. If there are no more such fields, the return value
5140 next_initializable_field (tree field
)
5143 && (TREE_CODE (field
) != FIELD_DECL
5144 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5145 || DECL_ARTIFICIAL (field
)))
5146 field
= DECL_CHAIN (field
);
5151 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5152 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5153 INTEGER_CST representing the size of the array minus one (the maximum index),
5154 or NULL_TREE if the array was declared without specifying the size. D is
5155 the iterator within the constructor. */
5158 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5159 tsubst_flags_t complain
)
5162 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5163 unsigned HOST_WIDE_INT max_index_cst
= 0;
5164 unsigned HOST_WIDE_INT index
;
5166 /* The initializer for an array is always a CONSTRUCTOR. */
5167 new_init
= build_constructor (init_list_type_node
, NULL
);
5171 /* Minus 1 is used for zero sized arrays. */
5172 if (integer_all_onesp (max_index
))
5175 if (tree_fits_uhwi_p (max_index
))
5176 max_index_cst
= tree_to_uhwi (max_index
);
5177 /* sizetype is sign extended, not zero extended. */
5179 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5182 /* Loop until there are no more initializers. */
5184 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5188 constructor_elt
*old_cur
= d
->cur
;
5190 check_array_designated_initializer (d
->cur
, index
);
5191 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5193 if (elt_init
== error_mark_node
)
5194 return error_mark_node
;
5195 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5196 size_int (index
), elt_init
);
5197 if (!TREE_CONSTANT (elt_init
))
5198 TREE_CONSTANT (new_init
) = false;
5200 /* This can happen with an invalid initializer (c++/54501). */
5201 if (d
->cur
== old_cur
&& !sized_array_p
)
5208 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5209 Parameters are the same of reshape_init_r. */
5212 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5214 tree max_index
= NULL_TREE
;
5216 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5218 if (TYPE_DOMAIN (type
))
5219 max_index
= array_type_nelts (type
);
5221 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5224 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5225 Parameters are the same of reshape_init_r. */
5228 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5230 tree max_index
= NULL_TREE
;
5232 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5234 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5236 tree value
= d
->cur
->value
;
5237 if (!same_type_p (TREE_TYPE (value
), type
))
5239 if (complain
& tf_error
)
5240 error ("invalid type %qT as initializer for a vector of type %qT",
5241 TREE_TYPE (d
->cur
->value
), type
);
5242 value
= error_mark_node
;
5248 /* For a vector, we initialize it as an array of the appropriate size. */
5249 if (TREE_CODE (type
) == VECTOR_TYPE
)
5250 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5252 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5255 /* Subroutine of reshape_init_r, processes the initializers for classes
5256 or union. Parameters are the same of reshape_init_r. */
5259 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5260 tsubst_flags_t complain
)
5265 gcc_assert (CLASS_TYPE_P (type
));
5267 /* The initializer for a class is always a CONSTRUCTOR. */
5268 new_init
= build_constructor (init_list_type_node
, NULL
);
5269 field
= next_initializable_field (TYPE_FIELDS (type
));
5275 An initializer for an aggregate member that is an
5276 empty class shall have the form of an empty
5277 initializer-list {}. */
5278 if (!first_initializer_p
)
5280 if (complain
& tf_error
)
5281 error ("initializer for %qT must be brace-enclosed", type
);
5282 return error_mark_node
;
5287 /* Loop through the initializable fields, gathering initializers. */
5288 while (d
->cur
!= d
->end
)
5291 constructor_elt
*old_cur
= d
->cur
;
5293 /* Handle designated initializers, as an extension. */
5296 if (d
->cur
->index
== error_mark_node
)
5297 return error_mark_node
;
5299 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5300 /* We already reshaped this. */
5301 gcc_assert (d
->cur
->index
== field
);
5302 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5303 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5306 if (complain
& tf_error
)
5307 error ("%<[%E] =%> used in a GNU-style designated initializer"
5308 " for class %qT", d
->cur
->index
, type
);
5309 return error_mark_node
;
5312 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5314 if (complain
& tf_error
)
5315 error ("%qT has no non-static data member named %qD", type
,
5317 return error_mark_node
;
5321 /* If we processed all the member of the class, we are done. */
5325 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5326 /*first_initializer_p=*/false, complain
);
5327 if (field_init
== error_mark_node
)
5328 return error_mark_node
;
5330 if (d
->cur
== old_cur
&& d
->cur
->index
)
5332 /* This can happen with an invalid initializer for a flexible
5333 array member (c++/54441). */
5334 if (complain
& tf_error
)
5335 error ("invalid initializer for %q#D", field
);
5336 return error_mark_node
;
5339 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5343 When a union is initialized with a brace-enclosed
5344 initializer, the braces shall only contain an
5345 initializer for the first member of the union. */
5346 if (TREE_CODE (type
) == UNION_TYPE
)
5349 field
= next_initializable_field (DECL_CHAIN (field
));
5355 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5356 designators are not valid; either complain or return true to indicate
5357 that reshape_init_r should return error_mark_node. */
5360 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5364 if (complain
& tf_error
)
5365 error ("C99 designator %qE outside aggregate initializer",
5373 /* Subroutine of reshape_init, which processes a single initializer (part of
5374 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5375 iterator within the CONSTRUCTOR which points to the initializer to process.
5376 FIRST_INITIALIZER_P is true if this is the first initializer of the
5377 outermost CONSTRUCTOR node. */
5380 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5381 tsubst_flags_t complain
)
5383 tree init
= d
->cur
->value
;
5385 if (error_operand_p (init
))
5386 return error_mark_node
;
5388 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5389 && has_designator_problem (d
, complain
))
5390 return error_mark_node
;
5392 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5394 /* A complex type can be initialized from one or two initializers,
5395 but braces are not elided. */
5397 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5399 if (CONSTRUCTOR_NELTS (init
) > 2)
5401 if (complain
& tf_error
)
5402 error ("too many initializers for %qT", type
);
5404 return error_mark_node
;
5407 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5409 vec
<constructor_elt
, va_gc
> *v
= 0;
5410 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5411 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5412 if (has_designator_problem (d
, complain
))
5413 return error_mark_node
;
5415 init
= build_constructor (init_list_type_node
, v
);
5420 /* A non-aggregate type is always initialized with a single
5422 if (!CP_AGGREGATE_TYPE_P (type
))
5424 /* It is invalid to initialize a non-aggregate type with a
5425 brace-enclosed initializer before C++0x.
5426 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5427 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5428 a CONSTRUCTOR (with a record type). */
5429 if (TREE_CODE (init
) == CONSTRUCTOR
5430 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5432 if (SCALAR_TYPE_P (type
))
5434 if (complain
& tf_error
)
5435 error ("braces around scalar initializer for type %qT", type
);
5436 init
= error_mark_node
;
5439 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5446 /* "If T is a class type and the initializer list has a single element of
5447 type cv U, where U is T or a class derived from T, the object is
5448 initialized from that element." Even if T is an aggregate. */
5449 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5450 && first_initializer_p
5451 && d
->end
- d
->cur
== 1
5452 && reference_related_p (type
, TREE_TYPE (init
)))
5460 All implicit type conversions (clause _conv_) are considered when
5461 initializing the aggregate member with an initializer from an
5462 initializer-list. If the initializer can initialize a member,
5463 the member is initialized. Otherwise, if the member is itself a
5464 non-empty subaggregate, brace elision is assumed and the
5465 initializer is considered for the initialization of the first
5466 member of the subaggregate. */
5467 if (TREE_CODE (init
) != CONSTRUCTOR
5468 /* But don't try this for the first initializer, since that would be
5469 looking through the outermost braces; A a2 = { a1 }; is not a
5470 valid aggregate initialization. */
5471 && !first_initializer_p
5472 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5473 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5480 /* [dcl.init.string]
5482 A char array (whether plain char, signed char, or unsigned char)
5483 can be initialized by a string-literal (optionally enclosed in
5484 braces); a wchar_t array can be initialized by a wide
5485 string-literal (optionally enclosed in braces). */
5486 if (TREE_CODE (type
) == ARRAY_TYPE
5487 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5489 tree str_init
= init
;
5491 /* Strip one level of braces if and only if they enclose a single
5492 element (as allowed by [dcl.init.string]). */
5493 if (!first_initializer_p
5494 && TREE_CODE (str_init
) == CONSTRUCTOR
5495 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5497 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5500 /* If it's a string literal, then it's the initializer for the array
5501 as a whole. Otherwise, continue with normal initialization for
5502 array types (one value per array element). */
5503 if (TREE_CODE (str_init
) == STRING_CST
)
5505 if (has_designator_problem (d
, complain
))
5506 return error_mark_node
;
5512 /* The following cases are about aggregates. If we are not within a full
5513 initializer already, and there is not a CONSTRUCTOR, it means that there
5514 is a missing set of braces (that is, we are processing the case for
5515 which reshape_init exists). */
5516 if (!first_initializer_p
)
5518 if (TREE_CODE (init
) == CONSTRUCTOR
)
5520 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5521 /* There is no need to reshape pointer-to-member function
5522 initializers, as they are always constructed correctly
5523 by the front end. */
5525 else if (COMPOUND_LITERAL_P (init
))
5526 /* For a nested compound literal, there is no need to reshape since
5527 brace elision is not allowed. Even if we decided to allow it,
5528 we should add a call to reshape_init in finish_compound_literal,
5529 before calling digest_init, so changing this code would still
5530 not be necessary. */
5531 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5535 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5536 return reshape_init (type
, init
, complain
);
5540 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5544 /* Dispatch to specialized routines. */
5545 if (CLASS_TYPE_P (type
))
5546 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5547 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5548 return reshape_init_array (type
, d
, complain
);
5549 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5550 return reshape_init_vector (type
, d
, complain
);
5555 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5556 brace-enclosed aggregate initializer.
5558 INIT is the CONSTRUCTOR containing the list of initializers describing
5559 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5560 It may not presently match the shape of the TYPE; for example:
5562 struct S { int a; int b; };
5563 struct S a[] = { 1, 2, 3, 4 };
5565 Here INIT will hold a vector of four elements, rather than a
5566 vector of two elements, each itself a vector of two elements. This
5567 routine transforms INIT from the former form into the latter. The
5568 revised CONSTRUCTOR node is returned. */
5571 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5573 vec
<constructor_elt
, va_gc
> *v
;
5577 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5579 v
= CONSTRUCTOR_ELTS (init
);
5581 /* An empty constructor does not need reshaping, and it is always a valid
5583 if (vec_safe_is_empty (v
))
5586 /* Recurse on this CONSTRUCTOR. */
5588 d
.end
= d
.cur
+ v
->length ();
5590 new_init
= reshape_init_r (type
, &d
, true, complain
);
5591 if (new_init
== error_mark_node
)
5592 return error_mark_node
;
5594 /* Make sure all the element of the constructor were used. Otherwise,
5595 issue an error about exceeding initializers. */
5598 if (complain
& tf_error
)
5599 error ("too many initializers for %qT", type
);
5601 return error_mark_node
;
5607 /* Verify array initializer. Returns true if errors have been reported. */
5610 check_array_initializer (tree decl
, tree type
, tree init
)
5612 tree element_type
= TREE_TYPE (type
);
5614 /* The array type itself need not be complete, because the
5615 initializer may tell us how many elements are in the array.
5616 But, the elements of the array must be complete. */
5617 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5620 error ("elements of array %q#D have incomplete type", decl
);
5622 error ("elements of array %q#T have incomplete type", type
);
5625 /* A compound literal can't have variable size. */
5627 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5628 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5630 error ("variable-sized compound literal");
5636 /* Subroutine of check_initializer; args are passed down from that function.
5637 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5640 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5643 gcc_assert (stmts_are_full_exprs_p ());
5644 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5647 /* Verify INIT (the initializer for DECL), and record the
5648 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5649 grok_reference_init.
5651 If the return value is non-NULL, it is an expression that must be
5652 evaluated dynamically to initialize DECL. */
5655 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5657 tree type
= TREE_TYPE (decl
);
5658 tree init_code
= NULL
;
5661 /* Things that are going to be initialized need to have complete
5663 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5665 if (DECL_HAS_VALUE_EXPR_P (decl
))
5667 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5668 it doesn't have storage to be initialized. */
5669 gcc_assert (init
== NULL_TREE
);
5673 if (type
== error_mark_node
)
5674 /* We will have already complained. */
5677 if (TREE_CODE (type
) == ARRAY_TYPE
)
5679 if (check_array_initializer (decl
, type
, init
))
5682 else if (!COMPLETE_TYPE_P (type
))
5684 error ("%q#D has incomplete type", decl
);
5685 TREE_TYPE (decl
) = error_mark_node
;
5689 /* There is no way to make a variable-sized class type in GNU C++. */
5690 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5692 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5694 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5695 if (SCALAR_TYPE_P (type
))
5699 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5700 init
= build_zero_init (type
, NULL_TREE
, false);
5702 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5704 error ("scalar object %qD requires one element in initializer",
5706 TREE_TYPE (decl
) = error_mark_node
;
5712 if (TREE_CODE (decl
) == CONST_DECL
)
5714 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5716 DECL_INITIAL (decl
) = init
;
5718 gcc_assert (init
!= NULL_TREE
);
5721 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5723 else if (init
|| type_build_ctor_call (type
)
5724 || TREE_CODE (type
) == REFERENCE_TYPE
)
5726 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5728 init
= grok_reference_init (decl
, type
, init
, flags
);
5729 flags
|= LOOKUP_ALREADY_DIGESTED
;
5732 check_for_uninitialized_const_var (decl
);
5733 /* Do not reshape constructors of vectors (they don't need to be
5735 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5737 if (is_std_init_list (type
))
5739 init
= perform_implicit_conversion (type
, init
,
5740 tf_warning_or_error
);
5741 flags
|= LOOKUP_ALREADY_DIGESTED
;
5743 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5745 /* Don't reshape if the class has constructors. */
5746 if (cxx_dialect
== cxx98
)
5747 error ("in C++98 %qD must be initialized by constructor, "
5751 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5753 error ("opaque vector types cannot be initialized");
5754 init
= error_mark_node
;
5758 init
= reshape_init (type
, init
, tf_warning_or_error
);
5759 flags
|= LOOKUP_NO_NARROWING
;
5762 else if (TREE_CODE (init
) == TREE_LIST
5763 && TREE_TYPE (init
) != unknown_type_node
5764 && !MAYBE_CLASS_TYPE_P (type
))
5766 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5768 /* We get here with code like `int a (2);' */
5769 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5770 tf_warning_or_error
);
5773 /* If DECL has an array type without a specific bound, deduce the
5774 array size from the initializer. */
5775 maybe_deduce_size_from_array_init (decl
, init
);
5776 type
= TREE_TYPE (decl
);
5777 if (type
== error_mark_node
)
5780 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5781 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5782 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5783 && CP_AGGREGATE_TYPE_P (type
)
5784 && (CLASS_TYPE_P (type
)
5785 || !TYPE_NEEDS_CONSTRUCTING (type
)
5786 || type_has_extended_temps (type
))))
5788 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5790 /* A constructor call is a non-trivial initializer even if
5791 it isn't explicitly written. */
5792 if (TREE_SIDE_EFFECTS (init_code
))
5793 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5795 /* If this is a constexpr initializer, expand_default_init will
5796 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5797 case, pull the initializer back out and pass it down into
5798 store_init_value. */
5799 while (TREE_CODE (init_code
) == EXPR_STMT
5800 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5801 init_code
= TREE_OPERAND (init_code
, 0);
5802 if (TREE_CODE (init_code
) == INIT_EXPR
)
5804 init
= TREE_OPERAND (init_code
, 1);
5805 init_code
= NULL_TREE
;
5806 /* Don't call digest_init; it's unnecessary and will complain
5807 about aggregate initialization of non-aggregate classes. */
5808 flags
|= LOOKUP_ALREADY_DIGESTED
;
5810 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5812 /* Declared constexpr, but no suitable initializer; massage
5813 init appropriately so we can pass it into store_init_value
5815 if (CLASS_TYPE_P (type
)
5816 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5818 init
= build_functional_cast (type
, init
, tf_none
);
5819 if (TREE_CODE (init
) == TARGET_EXPR
)
5820 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5822 init_code
= NULL_TREE
;
5828 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5830 /* In aggregate initialization of a variable, each element
5831 initialization is a full-expression because there is no
5832 enclosing expression. */
5833 gcc_assert (stmts_are_full_exprs_p ());
5835 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5837 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5838 && DECL_INITIAL (decl
)
5839 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5840 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5841 warning (0, "array %qD initialized by parenthesized string literal %qE",
5842 decl
, DECL_INITIAL (decl
));
5848 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5849 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5850 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5851 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5854 check_for_uninitialized_const_var (decl
);
5857 if (init
&& init
!= error_mark_node
)
5858 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5862 /* We might have set these in cp_finish_decl. */
5863 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
5864 TREE_CONSTANT (decl
) = false;
5867 if (init_code
&& DECL_IN_AGGR_P (decl
))
5869 static int explained
= 0;
5871 if (cxx_dialect
< cxx11
)
5872 error ("initializer invalid for static member with constructor");
5874 error ("non-constant in-class initialization invalid for static "
5875 "member %qD", decl
);
5878 inform (input_location
,
5879 "(an out of class initialization is required)");
5888 /* If DECL is not a local variable, give it RTL. */
5891 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5893 int toplev
= toplevel_bindings_p ();
5895 const char *filename
;
5897 /* Set the DECL_ASSEMBLER_NAME for the object. */
5900 /* The `register' keyword, when used together with an
5901 asm-specification, indicates that the variable should be
5902 placed in a particular register. */
5903 if (VAR_P (decl
) && DECL_REGISTER (decl
))
5905 set_user_assembler_name (decl
, asmspec
);
5906 DECL_HARD_REGISTER (decl
) = 1;
5910 if (TREE_CODE (decl
) == FUNCTION_DECL
5911 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5912 set_builtin_user_assembler_name (decl
, asmspec
);
5913 set_user_assembler_name (decl
, asmspec
);
5917 /* Handle non-variables up front. */
5920 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5924 /* If we see a class member here, it should be a static data
5926 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5928 gcc_assert (TREE_STATIC (decl
));
5929 /* An in-class declaration of a static data member should be
5930 external; it is only a declaration, and not a definition. */
5931 if (init
== NULL_TREE
)
5932 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5935 /* We don't create any RTL for local variables. */
5936 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5939 /* We defer emission of local statics until the corresponding
5940 DECL_EXPR is expanded. */
5941 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5943 /* We try to defer namespace-scope static constants so that they are
5944 not emitted into the object file unnecessarily. */
5945 filename
= LOCATION_FILE (input_location
);
5946 if (!DECL_VIRTUAL_P (decl
)
5947 && TREE_READONLY (decl
)
5948 && DECL_INITIAL (decl
) != NULL_TREE
5949 && DECL_INITIAL (decl
) != error_mark_node
5951 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5953 && !TREE_PUBLIC (decl
))
5955 /* Fool with the linkage of static consts according to #pragma
5957 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5958 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5960 TREE_PUBLIC (decl
) = 1;
5961 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5966 /* Likewise for template instantiations. */
5967 else if (DECL_LANG_SPECIFIC (decl
)
5968 && DECL_IMPLICIT_INSTANTIATION (decl
))
5971 /* If we're not deferring, go ahead and assemble the variable. */
5973 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5976 /* walk_tree helper for wrap_temporary_cleanups, below. */
5979 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5981 /* Stop at types or full-expression boundaries. */
5982 if (TYPE_P (*stmt_p
)
5983 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5989 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5991 tree guard
= (tree
)data
;
5992 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5994 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5995 /* Tell honor_protect_cleanup_actions to handle this as a separate
5997 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5999 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6005 /* We're initializing a local variable which has a cleanup GUARD. If there
6006 are any temporaries used in the initializer INIT of this variable, we
6007 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6008 variable will be cleaned up properly if one of them throws.
6010 Unfortunately, there's no way to express this properly in terms of
6011 nesting, as the regions for the temporaries overlap the region for the
6012 variable itself; if there are two temporaries, the variable needs to be
6013 the first thing destroyed if either of them throws. However, we only
6014 want to run the variable's cleanup if it actually got constructed. So
6015 we need to guard the temporary cleanups with the variable's cleanup if
6016 they are run on the normal path, but not if they are run on the
6017 exceptional path. We implement this by telling
6018 honor_protect_cleanup_actions to strip the variable cleanup from the
6019 exceptional path. */
6022 wrap_temporary_cleanups (tree init
, tree guard
)
6024 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6027 /* Generate code to initialize DECL (a local variable). */
6030 initialize_local_var (tree decl
, tree init
)
6032 tree type
= TREE_TYPE (decl
);
6036 gcc_assert (VAR_P (decl
)
6037 || TREE_CODE (decl
) == RESULT_DECL
);
6038 gcc_assert (!TREE_STATIC (decl
));
6040 if (DECL_SIZE (decl
) == NULL_TREE
)
6042 /* If we used it already as memory, it must stay in memory. */
6043 DECL_INITIAL (decl
) = NULL_TREE
;
6044 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6048 if (type
== error_mark_node
)
6051 /* Compute and store the initial value. */
6052 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6053 if (TREE_USED (type
))
6054 DECL_READ_P (decl
) = 1;
6056 /* Generate a cleanup, if necessary. */
6057 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6059 /* Perform the initialization. */
6062 if (TREE_CODE (init
) == INIT_EXPR
6063 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
6065 /* Stick simple initializers in DECL_INITIAL so that
6066 -Wno-init-self works (c++/34772). */
6067 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6068 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
6072 int saved_stmts_are_full_exprs_p
;
6074 /* If we're only initializing a single object, guard the
6075 destructors of any temporaries used in its initializer with
6076 its destructor. This isn't right for arrays because each
6077 element initialization is a full-expression. */
6078 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6079 wrap_temporary_cleanups (init
, cleanup
);
6081 gcc_assert (building_stmt_list_p ());
6082 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6083 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6084 finish_expr_stmt (init
);
6085 current_stmt_tree ()->stmts_are_full_exprs_p
=
6086 saved_stmts_are_full_exprs_p
;
6090 /* Set this to 0 so we can tell whether an aggregate which was
6091 initialized was ever used. Don't do this if it has a
6092 destructor, so we don't complain about the 'resource
6093 allocation is initialization' idiom. Now set
6094 attribute((unused)) on types so decls of that type will be
6095 marked used. (see TREE_USED, above.) */
6096 if (TYPE_NEEDS_CONSTRUCTING (type
)
6098 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6099 && DECL_NAME (decl
))
6100 TREE_USED (decl
) = 0;
6101 else if (already_used
)
6102 TREE_USED (decl
) = 1;
6105 finish_decl_cleanup (decl
, cleanup
);
6108 /* DECL is a VAR_DECL for a compiler-generated variable with static
6109 storage duration (like a virtual table) whose initializer is a
6110 compile-time constant. Initialize the variable and provide it to the
6114 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6117 gcc_assert (DECL_ARTIFICIAL (decl
));
6118 init
= build_constructor (TREE_TYPE (decl
), v
);
6119 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6120 DECL_INITIAL (decl
) = init
;
6121 DECL_INITIALIZED_P (decl
) = 1;
6122 determine_visibility (decl
);
6123 layout_var_decl (decl
);
6124 maybe_commonize_var (decl
);
6125 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6128 /* INIT is the initializer for a variable, as represented by the
6129 parser. Returns true iff INIT is type-dependent. */
6132 type_dependent_init_p (tree init
)
6134 if (TREE_CODE (init
) == TREE_LIST
)
6135 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6136 return any_type_dependent_elements_p (init
);
6137 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6138 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6140 vec
<constructor_elt
, va_gc
> *elts
;
6144 elts
= CONSTRUCTOR_ELTS (init
);
6145 nelts
= vec_safe_length (elts
);
6146 for (i
= 0; i
< nelts
; ++i
)
6147 if (type_dependent_init_p ((*elts
)[i
].value
))
6151 /* It must be a simple expression, e.g., int i = 3; */
6152 return type_dependent_expression_p (init
);
6157 /* INIT is the initializer for a variable, as represented by the
6158 parser. Returns true iff INIT is value-dependent. */
6161 value_dependent_init_p (tree init
)
6163 if (TREE_CODE (init
) == TREE_LIST
)
6164 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6165 return any_value_dependent_elements_p (init
);
6166 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6167 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6169 vec
<constructor_elt
, va_gc
> *elts
;
6173 elts
= CONSTRUCTOR_ELTS (init
);
6174 nelts
= vec_safe_length (elts
);
6175 for (i
= 0; i
< nelts
; ++i
)
6176 if (value_dependent_init_p ((*elts
)[i
].value
))
6180 /* It must be a simple expression, e.g., int i = 3; */
6181 return value_dependent_expression_p (init
);
6186 /* Finish processing of a declaration;
6187 install its line number and initial value.
6188 If the length of an array type is not known before,
6189 it must be determined now, from the initial value, or it is an error.
6191 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6192 true, then INIT is an integral constant expression.
6194 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6195 if the (init) syntax was used. */
6198 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6199 tree asmspec_tree
, int flags
)
6202 vec
<tree
, va_gc
> *cleanups
= NULL
;
6203 const char *asmspec
= NULL
;
6204 int was_readonly
= 0;
6205 bool var_definition_p
= false;
6208 if (decl
== error_mark_node
)
6213 error ("assignment (not initialization) in declaration");
6217 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6218 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6219 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6221 type
= TREE_TYPE (decl
);
6222 if (type
== error_mark_node
)
6225 /* If a name was specified, get the string. */
6226 if (at_namespace_scope_p ())
6227 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6228 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6229 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6231 if (current_class_type
6232 && CP_DECL_CONTEXT (decl
) == current_class_type
6233 && TYPE_BEING_DEFINED (current_class_type
)
6234 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6235 && (DECL_INITIAL (decl
) || init
))
6236 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6238 if (TREE_CODE (decl
) != FUNCTION_DECL
6239 && (auto_node
= type_uses_auto (type
)))
6242 if (init
== NULL_TREE
)
6244 if (DECL_LANG_SPECIFIC (decl
)
6245 && DECL_TEMPLATE_INSTANTIATION (decl
)
6246 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6248 /* init is null because we're deferring instantiating the
6249 initializer until we need it. Well, we need it now. */
6250 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6254 error ("declaration of %q#D has no initializer", decl
);
6255 TREE_TYPE (decl
) = error_mark_node
;
6259 if (TREE_CODE (d_init
) == TREE_LIST
)
6260 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6261 tf_warning_or_error
);
6262 d_init
= resolve_nondeduced_context (d_init
);
6263 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6265 if (type
== error_mark_node
)
6267 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6270 if (!ensure_literal_type_for_constexpr_object (decl
))
6271 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6274 && DECL_CLASS_SCOPE_P (decl
)
6275 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6276 check_static_variable_definition (decl
, type
);
6278 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6281 if (init
== ridpointers
[(int)RID_DELETE
])
6283 /* FIXME check this is 1st decl. */
6284 DECL_DELETED_FN (decl
) = 1;
6285 DECL_DECLARED_INLINE_P (decl
) = 1;
6286 DECL_INITIAL (decl
) = error_mark_node
;
6287 FOR_EACH_CLONE (clone
, decl
)
6289 DECL_DELETED_FN (clone
) = 1;
6290 DECL_DECLARED_INLINE_P (clone
) = 1;
6291 DECL_INITIAL (clone
) = error_mark_node
;
6295 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6297 if (defaultable_fn_check (decl
))
6298 DECL_DEFAULTED_FN (decl
) = 1;
6300 DECL_INITIAL (decl
) = NULL_TREE
;
6304 if (init
&& VAR_P (decl
))
6306 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6307 /* If DECL is a reference, then we want to know whether init is a
6308 reference constant; init_const_expr_p as passed tells us whether
6309 it's an rvalue constant. */
6310 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6311 init_const_expr_p
= potential_constant_expression (init
);
6312 if (init_const_expr_p
)
6314 /* Set these flags now for templates. We'll update the flags in
6315 store_init_value for instantiations. */
6316 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6317 if (decl_maybe_constant_var_p (decl
))
6318 TREE_CONSTANT (decl
) = 1;
6322 if (processing_template_decl
)
6324 bool type_dependent_p
;
6326 /* Add this declaration to the statement-tree. */
6327 if (at_function_scope_p ())
6328 add_decl_expr (decl
);
6330 type_dependent_p
= dependent_type_p (type
);
6332 if (check_for_bare_parameter_packs (init
))
6335 DECL_INITIAL (decl
) = NULL_TREE
;
6338 /* Generally, initializers in templates are expanded when the
6339 template is instantiated. But, if DECL is a variable constant
6340 then it can be used in future constant expressions, so its value
6341 must be available. */
6343 if (!VAR_P (decl
) || dependent_type_p (type
))
6344 /* We can't do anything if the decl has dependent type. */;
6346 && init_const_expr_p
6347 && !type_dependent_p
6348 && decl_maybe_constant_var_p (decl
)
6349 && !type_dependent_init_p (init
)
6350 && !value_dependent_init_p (init
))
6352 /* This variable seems to be a non-dependent constant, so process
6353 its initializer. If check_initializer returns non-null the
6354 initialization wasn't constant after all. */
6356 cleanups
= make_tree_vector ();
6357 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6358 if (init_code
== NULL_TREE
)
6360 release_tree_vector (cleanups
);
6362 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6364 /* Deduce array size even if the initializer is dependent. */
6365 maybe_deduce_size_from_array_init (decl
, init
);
6366 /* And complain about multiple initializers. */
6367 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6368 && !MAYBE_CLASS_TYPE_P (type
))
6369 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6370 tf_warning_or_error
);
6374 DECL_INITIAL (decl
) = init
;
6378 /* Just store non-static data member initializers for later. */
6379 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6380 DECL_INITIAL (decl
) = init
;
6382 /* Take care of TYPE_DECLs up front. */
6383 if (TREE_CODE (decl
) == TYPE_DECL
)
6385 if (type
!= error_mark_node
6386 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6388 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6389 warning (0, "shadowing previous type declaration of %q#D", decl
);
6390 set_identifier_type_value (DECL_NAME (decl
), decl
);
6393 /* If we have installed this as the canonical typedef for this
6394 type, and that type has not been defined yet, delay emitting
6395 the debug information for it, as we will emit it later. */
6396 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6397 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6398 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6400 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6405 /* A reference will be modified here, as it is initialized. */
6406 if (! DECL_EXTERNAL (decl
)
6407 && TREE_READONLY (decl
)
6408 && TREE_CODE (type
) == REFERENCE_TYPE
)
6411 TREE_READONLY (decl
) = 0;
6416 /* If this is a local variable that will need a mangled name,
6417 register it now. We must do this before processing the
6418 initializer for the variable, since the initialization might
6419 require a guard variable, and since the mangled name of the
6420 guard variable will depend on the mangled name of this
6422 if (DECL_FUNCTION_SCOPE_P (decl
)
6423 && TREE_STATIC (decl
)
6424 && !DECL_ARTIFICIAL (decl
))
6426 push_local_name (decl
);
6427 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6428 || DECL_DESTRUCTOR_P (current_function_decl
))
6429 /* Normally local_decls is populated during GIMPLE lowering,
6430 but [cd]tors are never actually compiled directly. We need
6431 to put statics on the list so we can deal with the label
6432 address extension. FIXME. */
6433 add_local_decl (cfun
, decl
);
6436 /* Convert the initializer to the type of DECL, if we have not
6437 already initialized DECL. */
6438 if (!DECL_INITIALIZED_P (decl
)
6439 /* If !DECL_EXTERNAL then DECL is being defined. In the
6440 case of a static data member initialized inside the
6441 class-specifier, there can be an initializer even if DECL
6442 is *not* defined. */
6443 && (!DECL_EXTERNAL (decl
) || init
))
6445 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6448 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6449 /* Allow libjava/prims.cc define primitive classes. */
6450 if (init
!= NULL_TREE
6451 || jclass
== NULL_TREE
6452 || TREE_CODE (jclass
) != TYPE_DECL
6453 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6454 || !same_type_ignoring_top_level_qualifiers_p
6455 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6456 error ("Java object %qD not allocated with %<new%>", decl
);
6459 cleanups
= make_tree_vector ();
6460 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6466 The memory occupied by any object of static storage
6467 duration is zero-initialized at program startup before
6468 any other initialization takes place.
6470 We cannot create an appropriate initializer until after
6471 the type of DECL is finalized. If DECL_INITIAL is set,
6472 then the DECL is statically initialized, and any
6473 necessary zero-initialization has already been performed. */
6474 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6475 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6476 /*nelts=*/NULL_TREE
,
6477 /*static_storage_p=*/true);
6478 /* Remember that the initialization for this variable has
6480 DECL_INITIALIZED_P (decl
) = 1;
6481 /* This declaration is the definition of this variable,
6482 unless we are initializing a static data member within
6483 the class specifier. */
6484 if (!DECL_EXTERNAL (decl
))
6485 var_definition_p
= true;
6487 /* If the variable has an array type, lay out the type, even if
6488 there is no initializer. It is valid to index through the
6489 array, and we must get TYPE_ALIGN set correctly on the array
6491 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6494 if (TREE_STATIC (decl
)
6495 && !at_function_scope_p ()
6496 && current_function_decl
== NULL
)
6497 /* So decl is a global variable or a static member of a
6498 non local class. Record the types it uses
6499 so that we can decide later to emit debug info for them. */
6500 record_types_used_by_current_var_decl (decl
);
6502 else if (TREE_CODE (decl
) == FIELD_DECL
6503 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6504 error ("non-static data member %qD has Java class type", decl
);
6506 /* Add this declaration to the statement-tree. This needs to happen
6507 after the call to check_initializer so that the DECL_EXPR for a
6508 reference temp is added before the DECL_EXPR for the reference itself. */
6509 if (DECL_FUNCTION_SCOPE_P (decl
))
6511 /* If we're building a variable sized type, and we might be
6512 reachable other than via the top of the current binding
6513 level, then create a new BIND_EXPR so that we deallocate
6514 the object at the right time. */
6517 && !TREE_CONSTANT (DECL_SIZE (decl
))
6518 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6521 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6522 TREE_SIDE_EFFECTS (bind
) = 1;
6524 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6526 add_decl_expr (decl
);
6529 /* Let the middle end know about variables and functions -- but not
6530 static data members in uninstantiated class templates. */
6531 if (VAR_OR_FUNCTION_DECL_P (decl
))
6535 layout_var_decl (decl
);
6536 maybe_commonize_var (decl
);
6539 /* This needs to happen after the linkage is set. */
6540 determine_visibility (decl
);
6542 if (var_definition_p
&& TREE_STATIC (decl
))
6544 /* If a TREE_READONLY variable needs initialization
6545 at runtime, it is no longer readonly and we need to
6546 avoid MEM_READONLY_P being set on RTL created for it. */
6549 if (TREE_READONLY (decl
))
6550 TREE_READONLY (decl
) = 0;
6553 else if (was_readonly
)
6554 TREE_READONLY (decl
) = 1;
6556 /* Likewise if it needs destruction. */
6557 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6558 TREE_READONLY (decl
) = 0;
6561 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6563 /* Check for abstractness of the type. Notice that there is no
6564 need to strip array types here since the check for those types
6565 is already done within create_array_type_for_decl. */
6566 abstract_virtuals_error (decl
, type
);
6568 if (TREE_TYPE (decl
) == error_mark_node
)
6569 /* No initialization required. */
6571 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6575 if (init
== ridpointers
[(int)RID_DEFAULT
])
6577 /* An out-of-class default definition is defined at
6578 the point where it is explicitly defaulted. */
6579 if (DECL_DELETED_FN (decl
))
6580 maybe_explain_implicit_delete (decl
);
6581 else if (DECL_INITIAL (decl
) == error_mark_node
)
6582 synthesize_method (decl
);
6585 error ("function %q#D is initialized like a variable", decl
);
6587 /* else no initialization required. */
6589 else if (DECL_EXTERNAL (decl
)
6590 && ! (DECL_LANG_SPECIFIC (decl
)
6591 && DECL_NOT_REALLY_EXTERN (decl
)))
6594 DECL_INITIAL (decl
) = init
;
6596 /* A variable definition. */
6597 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6598 /* Initialize the local variable. */
6599 initialize_local_var (decl
, init
);
6601 /* If a variable is defined, and then a subsequent
6602 definition with external linkage is encountered, we will
6603 get here twice for the same variable. We want to avoid
6604 calling expand_static_init more than once. For variables
6605 that are not static data members, we can call
6606 expand_static_init only when we actually process the
6607 initializer. It is not legal to redeclare a static data
6608 member, so this issue does not arise in that case. */
6609 else if (var_definition_p
&& TREE_STATIC (decl
))
6610 expand_static_init (decl
, init
);
6613 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6614 reference, insert it in the statement-tree now. */
6618 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6619 push_cleanup (decl
, t
, false);
6620 release_tree_vector (cleanups
);
6624 TREE_READONLY (decl
) = 1;
6626 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6629 /* Returns a declaration for a VAR_DECL as if:
6631 extern "C" TYPE NAME;
6633 had been seen. Used to create compiler-generated global
6637 declare_global_var (tree name
, tree type
)
6641 push_to_top_level ();
6642 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6643 TREE_PUBLIC (decl
) = 1;
6644 DECL_EXTERNAL (decl
) = 1;
6645 DECL_ARTIFICIAL (decl
) = 1;
6646 /* If the user has explicitly declared this variable (perhaps
6647 because the code we are compiling is part of a low-level runtime
6648 library), then it is possible that our declaration will be merged
6649 with theirs by pushdecl. */
6650 decl
= pushdecl (decl
);
6651 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6652 pop_from_top_level ();
6657 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6658 if "__cxa_atexit" is not being used) corresponding to the function
6659 to be called when the program exits. */
6662 get_atexit_fn_ptr_type (void)
6666 if (!atexit_fn_ptr_type_node
)
6669 if (flag_use_cxa_atexit
6670 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6671 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6672 arg_type
= ptr_type_node
;
6674 /* The parameter to "atexit" is "void (*)(void)". */
6675 arg_type
= NULL_TREE
;
6677 fn_type
= build_function_type_list (void_type_node
,
6678 arg_type
, NULL_TREE
);
6679 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6682 return atexit_fn_ptr_type_node
;
6685 /* Returns a pointer to the `atexit' function. Note that if
6686 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6687 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6690 get_atexit_node (void)
6696 bool use_aeabi_atexit
;
6701 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6703 /* The declaration for `__cxa_atexit' is:
6705 int __cxa_atexit (void (*)(void *), void *, void *)
6707 We build up the argument types and then the function type
6709 tree argtype0
, argtype1
, argtype2
;
6711 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6712 /* First, build the pointer-to-function type for the first
6714 fn_ptr_type
= get_atexit_fn_ptr_type ();
6715 /* Then, build the rest of the argument types. */
6716 argtype2
= ptr_type_node
;
6717 if (use_aeabi_atexit
)
6719 argtype1
= fn_ptr_type
;
6720 argtype0
= ptr_type_node
;
6724 argtype1
= ptr_type_node
;
6725 argtype0
= fn_ptr_type
;
6727 /* And the final __cxa_atexit type. */
6728 fn_type
= build_function_type_list (integer_type_node
,
6729 argtype0
, argtype1
, argtype2
,
6731 if (use_aeabi_atexit
)
6732 name
= "__aeabi_atexit";
6734 name
= "__cxa_atexit";
6738 /* The declaration for `atexit' is:
6740 int atexit (void (*)());
6742 We build up the argument types and then the function type
6744 fn_ptr_type
= get_atexit_fn_ptr_type ();
6745 /* Build the final atexit type. */
6746 fn_type
= build_function_type_list (integer_type_node
,
6747 fn_ptr_type
, NULL_TREE
);
6751 /* Now, build the function declaration. */
6752 push_lang_context (lang_name_c
);
6753 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6754 mark_used (atexit_fndecl
);
6755 pop_lang_context ();
6756 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6761 /* Like get_atexit_node, but for thread-local cleanups. */
6764 get_thread_atexit_node (void)
6766 /* The declaration for `__cxa_thread_atexit' is:
6768 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6769 tree fn_type
= build_function_type_list (integer_type_node
,
6770 get_atexit_fn_ptr_type (),
6771 ptr_type_node
, ptr_type_node
,
6774 /* Now, build the function declaration. */
6775 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6776 ECF_LEAF
| ECF_NOTHROW
);
6777 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6780 /* Returns the __dso_handle VAR_DECL. */
6783 get_dso_handle_node (void)
6785 if (dso_handle_node
)
6786 return dso_handle_node
;
6788 /* Declare the variable. */
6789 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6792 #ifdef HAVE_GAS_HIDDEN
6793 if (dso_handle_node
!= error_mark_node
)
6795 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6796 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6800 return dso_handle_node
;
6803 /* Begin a new function with internal linkage whose job will be simply
6804 to destroy some particular variable. */
6806 static GTY(()) int start_cleanup_cnt
;
6809 start_cleanup_fn (void)
6814 bool use_cxa_atexit
= flag_use_cxa_atexit
6815 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6817 push_to_top_level ();
6819 /* No need to mangle this. */
6820 push_lang_context (lang_name_c
);
6822 /* Build the name of the function. */
6823 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6824 /* Build the function declaration. */
6825 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6826 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6827 /* It's a function with internal linkage, generated by the
6829 TREE_PUBLIC (fndecl
) = 0;
6830 DECL_ARTIFICIAL (fndecl
) = 1;
6831 /* Make the function `inline' so that it is only emitted if it is
6832 actually needed. It is unlikely that it will be inlined, since
6833 it is only called via a function pointer, but we avoid unnecessary
6834 emissions this way. */
6835 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6836 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6837 /* Build the parameter. */
6842 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6843 DECL_CONTEXT (parmdecl
) = fndecl
;
6844 TREE_USED (parmdecl
) = 1;
6845 DECL_READ_P (parmdecl
) = 1;
6846 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6850 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6852 pop_lang_context ();
6854 return current_function_decl
;
6857 /* Finish the cleanup function begun by start_cleanup_fn. */
6860 end_cleanup_fn (void)
6862 expand_or_defer_fn (finish_function (0));
6864 pop_from_top_level ();
6867 /* Generate code to handle the destruction of DECL, an object with
6868 static storage duration. */
6871 register_dtor_fn (tree decl
)
6878 bool ob_parm
, dso_parm
, use_dtor
;
6879 tree arg0
, arg1
, arg2
;
6882 type
= TREE_TYPE (decl
);
6883 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6886 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
6887 "__aeabi_atexit"), and DECL is a class object, we can just pass the
6888 destructor to "__cxa_atexit"; we don't have to build a temporary
6889 function to do the cleanup. */
6890 dso_parm
= (flag_use_cxa_atexit
6891 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
6892 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
6893 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
6898 /* Find the destructor. */
6899 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6900 gcc_assert (idx
>= 0);
6901 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
6902 /* Make sure it is accessible. */
6903 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
6904 tf_warning_or_error
);
6908 /* Call build_cleanup before we enter the anonymous function so
6909 that any access checks will be done relative to the current
6910 scope, rather than the scope of the anonymous function. */
6911 build_cleanup (decl
);
6913 /* Now start the function. */
6914 cleanup
= start_cleanup_fn ();
6916 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6917 to the original function, rather than the anonymous one. That
6918 will make the back end think that nested functions are in use,
6919 which causes confusion. */
6920 push_deferring_access_checks (dk_no_check
);
6921 fcall
= build_cleanup (decl
);
6922 pop_deferring_access_checks ();
6924 /* Create the body of the anonymous function. */
6925 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6926 finish_expr_stmt (fcall
);
6927 finish_compound_stmt (compound_stmt
);
6931 /* Call atexit with the cleanup function. */
6932 mark_used (cleanup
);
6933 cleanup
= build_address (cleanup
);
6935 if (DECL_THREAD_LOCAL_P (decl
))
6936 atex_node
= get_thread_atexit_node ();
6938 atex_node
= get_atexit_node ();
6942 /* We must convert CLEANUP to the type that "__cxa_atexit"
6944 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6945 /* "__cxa_atexit" will pass the address of DECL to the
6946 cleanup function. */
6948 addr
= build_address (decl
);
6949 /* The declared type of the parameter to "__cxa_atexit" is
6950 "void *". For plain "T*", we could just let the
6951 machinery in cp_build_function_call convert it -- but if the
6952 type is "cv-qualified T *", then we need to convert it
6953 before passing it in, to avoid spurious errors. */
6954 addr
= build_nop (ptr_type_node
, addr
);
6957 /* Since the cleanup functions we build ignore the address
6958 they're given, there's no reason to pass the actual address
6959 in, and, in general, it's cheaper to pass NULL than any
6961 addr
= null_pointer_node
;
6964 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6965 tf_warning_or_error
);
6967 /* Just pass NULL to the dso handle parm if we don't actually
6968 have a DSO handle on this target. */
6969 arg2
= null_pointer_node
;
6975 if (!DECL_THREAD_LOCAL_P (decl
)
6976 && targetm
.cxx
.use_aeabi_atexit ())
6992 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
6993 arg0
, arg1
, arg2
, NULL_TREE
);
6996 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6997 is its initializer. Generate code to handle the construction
6998 and destruction of DECL. */
7001 expand_static_init (tree decl
, tree init
)
7003 gcc_assert (VAR_P (decl
));
7004 gcc_assert (TREE_STATIC (decl
));
7006 /* Some variables require no dynamic initialization. */
7008 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7010 /* Make sure the destructor is callable. */
7011 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7015 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7016 && !DECL_FUNCTION_SCOPE_P (decl
))
7019 error ("non-local variable %qD declared %<__thread%> "
7020 "needs dynamic initialization", decl
);
7022 error ("non-local variable %qD declared %<__thread%> "
7023 "has a non-trivial destructor", decl
);
7024 static bool informed
;
7027 inform (DECL_SOURCE_LOCATION (decl
),
7028 "C++11 %<thread_local%> allows dynamic initialization "
7035 if (DECL_FUNCTION_SCOPE_P (decl
))
7037 /* Emit code to perform this initialization but once. */
7038 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7039 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7040 tree guard
, guard_addr
;
7042 /* We don't need thread-safety code for thread-local vars. */
7043 bool thread_guard
= (flag_threadsafe_statics
7044 && !DECL_THREAD_LOCAL_P (decl
));
7046 /* Emit code to perform this initialization but once. This code
7049 static <type> guard;
7050 if (!guard.first_byte) {
7051 if (__cxa_guard_acquire (&guard)) {
7054 // Do initialization.
7055 flag = true; __cxa_guard_release (&guard);
7056 // Register variable for destruction at end of program.
7058 if (!flag) __cxa_guard_abort (&guard);
7062 Note that the `flag' variable is only set to 1 *after* the
7063 initialization is complete. This ensures that an exception,
7064 thrown during the construction, will cause the variable to
7065 reinitialized when we pass through this code again, as per:
7069 If the initialization exits by throwing an exception, the
7070 initialization is not complete, so it will be tried again
7071 the next time control enters the declaration.
7073 This process should be thread-safe, too; multiple threads
7074 should not be able to initialize the variable more than
7077 /* Create the guard variable. */
7078 guard
= get_guard (decl
);
7080 /* This optimization isn't safe on targets with relaxed memory
7081 consistency. On such targets we force synchronization in
7082 __cxa_guard_acquire. */
7083 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7085 /* Begin the conditional initialization. */
7086 if_stmt
= begin_if_stmt ();
7087 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
7088 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7093 tree vfntype
= NULL_TREE
;
7094 tree acquire_name
, release_name
, abort_name
;
7095 tree acquire_fn
, release_fn
, abort_fn
;
7096 guard_addr
= build_address (guard
);
7098 acquire_name
= get_identifier ("__cxa_guard_acquire");
7099 release_name
= get_identifier ("__cxa_guard_release");
7100 abort_name
= get_identifier ("__cxa_guard_abort");
7101 acquire_fn
= identifier_global_value (acquire_name
);
7102 release_fn
= identifier_global_value (release_name
);
7103 abort_fn
= identifier_global_value (abort_name
);
7105 acquire_fn
= push_library_fn
7106 (acquire_name
, build_function_type_list (integer_type_node
,
7107 TREE_TYPE (guard_addr
),
7109 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7110 if (!release_fn
|| !abort_fn
)
7111 vfntype
= build_function_type_list (void_type_node
,
7112 TREE_TYPE (guard_addr
),
7115 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7116 ECF_NOTHROW
| ECF_LEAF
);
7118 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7119 ECF_NOTHROW
| ECF_LEAF
);
7121 inner_if_stmt
= begin_if_stmt ();
7122 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7125 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7126 begin
= get_target_expr (boolean_false_node
);
7127 flag
= TARGET_EXPR_SLOT (begin
);
7129 TARGET_EXPR_CLEANUP (begin
)
7130 = build3 (COND_EXPR
, void_type_node
, flag
,
7132 build_call_n (abort_fn
, 1, guard_addr
));
7133 CLEANUP_EH_ONLY (begin
) = 1;
7135 /* Do the initialization itself. */
7136 init
= add_stmt_to_compound (begin
, init
);
7137 init
= add_stmt_to_compound
7138 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7139 init
= add_stmt_to_compound
7140 (init
, build_call_n (release_fn
, 1, guard_addr
));
7143 init
= add_stmt_to_compound (init
, set_guard (guard
));
7145 /* Use atexit to register a function for destroying this static
7147 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7149 finish_expr_stmt (init
);
7153 finish_compound_stmt (inner_then_clause
);
7154 finish_then_clause (inner_if_stmt
);
7155 finish_if_stmt (inner_if_stmt
);
7158 if (!targetm
.relaxed_ordering
|| !thread_guard
)
7160 finish_compound_stmt (then_clause
);
7161 finish_then_clause (if_stmt
);
7162 finish_if_stmt (if_stmt
);
7165 else if (DECL_THREAD_LOCAL_P (decl
))
7166 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7168 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7172 /* Make TYPE a complete type based on INITIAL_VALUE.
7173 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7174 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7175 3 if the initializer list is empty (in pedantic mode). */
7178 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7181 tree type
, elt_type
;
7183 /* Don't get confused by a CONSTRUCTOR for some other type. */
7184 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7185 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7190 unsigned HOST_WIDE_INT i
;
7193 /* An array of character type can be initialized from a
7194 brace-enclosed string constant.
7196 FIXME: this code is duplicated from reshape_init. Probably
7197 we should just call reshape_init here? */
7198 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7199 && TREE_CODE (initial_value
) == CONSTRUCTOR
7200 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7202 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7203 tree value
= (*v
)[0].value
;
7205 if (TREE_CODE (value
) == STRING_CST
7206 && v
->length () == 1)
7207 initial_value
= value
;
7210 /* If any of the elements are parameter packs, we can't actually
7211 complete this type now because the array size is dependent. */
7212 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7214 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7217 if (PACK_EXPANSION_P (value
))
7223 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7225 /* We can create the array before the element type is complete, which
7226 means that we didn't have these two bits set in the original type
7227 either. In completing the type, we are expected to propagate these
7228 bits. See also complete_type which does the same thing for arrays
7231 if (TYPE_DOMAIN (type
))
7233 elt_type
= TREE_TYPE (type
);
7234 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7235 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7236 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7242 /* As above, but either give an error or reject zero-size arrays, depending
7246 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7247 bool do_default
, tsubst_flags_t complain
)
7250 bool sfinae
= !(complain
& tf_error
);
7251 /* In SFINAE context we can't be lenient about zero-size arrays. */
7254 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7260 /* Not an error. */;
7261 else if (failure
== 1)
7262 error ("initializer fails to determine size of %qT", *ptype
);
7263 else if (failure
== 2)
7266 error ("array size missing in %qT", *ptype
);
7268 else if (failure
== 3)
7269 error ("zero-size array %qT", *ptype
);
7270 *ptype
= error_mark_node
;
7275 /* Return zero if something is declared to be a member of type
7276 CTYPE when in the context of CUR_TYPE. STRING is the error
7277 message to print in that case. Otherwise, quietly return 1. */
7280 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7282 if (ctype
&& ctype
!= cur_type
)
7284 if (flags
== DTOR_FLAG
)
7285 error ("destructor for alien class %qT cannot be a member", ctype
);
7287 error ("constructor for alien class %qT cannot be a member", ctype
);
7293 /* Subroutine of `grokdeclarator'. */
7295 /* Generate errors possibly applicable for a given set of specifiers.
7296 This is for ARM $7.1.2. */
7299 bad_specifiers (tree object
,
7300 enum bad_spec_place type
,
7311 error ("%qD declared as a %<virtual%> variable", object
);
7313 error ("%qD declared as an %<inline%> variable", object
);
7315 error ("%<const%> and %<volatile%> function specifiers on "
7316 "%qD invalid in variable declaration", object
);
7320 error ("%qD declared as a %<virtual%> parameter", object
);
7322 error ("%qD declared as an %<inline%> parameter", object
);
7324 error ("%<const%> and %<volatile%> function specifiers on "
7325 "%qD invalid in parameter declaration", object
);
7329 error ("%qD declared as a %<virtual%> type", object
);
7331 error ("%qD declared as an %<inline%> type", object
);
7333 error ("%<const%> and %<volatile%> function specifiers on "
7334 "%qD invalid in type declaration", object
);
7338 error ("%qD declared as a %<virtual%> field", object
);
7340 error ("%qD declared as an %<inline%> field", object
);
7342 error ("%<const%> and %<volatile%> function specifiers on "
7343 "%qD invalid in field declaration", object
);
7349 error ("%q+D declared as a friend", object
);
7351 && (TREE_CODE (object
) == TYPE_DECL
7352 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7353 && !TYPE_REFFN_P (TREE_TYPE (object
))
7354 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7355 error ("%q+D declared with an exception specification", object
);
7358 /* DECL is a member function or static data member and is presently
7359 being defined. Check that the definition is taking place in a
7363 check_class_member_definition_namespace (tree decl
)
7365 /* These checks only apply to member functions and static data
7367 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7368 /* We check for problems with specializations in pt.c in
7369 check_specialization_namespace, where we can issue better
7371 if (processing_specialization
)
7373 /* There are no restrictions on the placement of
7374 explicit instantiations. */
7375 if (processing_explicit_instantiation
)
7379 A member function definition that appears outside of the
7380 class definition shall appear in a namespace scope enclosing
7381 the class definition.
7385 The definition for a static data member shall appear in a
7386 namespace scope enclosing the member's class definition. */
7387 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7388 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7389 decl
, DECL_CONTEXT (decl
));
7392 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7393 METHOD_TYPE for a non-static member function; QUALS are the
7394 cv-qualifiers that apply to the function. */
7397 build_this_parm (tree type
, cp_cv_quals quals
)
7402 cp_cv_quals this_quals
;
7404 if (CLASS_TYPE_P (type
))
7407 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7408 this_type
= build_pointer_type (this_type
);
7411 this_type
= type_of_this_parm (type
);
7412 /* The `this' parameter is implicitly `const'; it cannot be
7414 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7415 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7416 parm
= build_artificial_parm (this_identifier
, qual_type
);
7417 cp_apply_type_quals_to_decl (this_quals
, parm
);
7421 /* DECL is a static member function. Complain if it was declared
7422 with function-cv-quals. */
7425 check_static_quals (tree decl
, cp_cv_quals quals
)
7427 if (quals
!= TYPE_UNQUALIFIED
)
7428 error ("static member function %q#D declared with type qualifiers",
7432 /* Helper function. Replace the temporary this parameter injected
7433 during cp_finish_omp_declare_simd with the real this parameter. */
7436 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7438 tree this_parm
= (tree
) data
;
7439 if (TREE_CODE (*tp
) == PARM_DECL
7440 && DECL_NAME (*tp
) == this_identifier
7441 && *tp
!= this_parm
)
7443 else if (TYPE_P (*tp
))
7448 /* CTYPE is class type, or null if non-class.
7449 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7451 DECLARATOR is the function's name.
7452 PARMS is a chain of PARM_DECLs for the function.
7453 VIRTUALP is truthvalue of whether the function is virtual or not.
7454 FLAGS are to be passed through to `grokclassfn'.
7455 QUALS are qualifiers indicating whether the function is `const'
7457 RAISES is a list of exceptions that this function can raise.
7458 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7459 not look, and -1 if we should not call `grokclassfn' at all.
7461 SFK is the kind of special function (if any) for the new function.
7463 Returns `NULL_TREE' if something goes wrong, after issuing
7464 applicable error messages. */
7467 grokfndecl (tree ctype
,
7471 tree orig_declarator
,
7473 enum overload_flags flags
,
7475 cp_ref_qualifier rqual
,
7481 special_function_kind sfk
,
7486 location_t location
)
7489 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7493 type
= build_ref_qualified_type (type
, rqual
);
7495 type
= build_exception_variant (type
, raises
);
7497 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7499 /* If we have an explicit location, use it, otherwise use whatever
7500 build_lang_decl used (probably input_location). */
7501 if (location
!= UNKNOWN_LOCATION
)
7502 DECL_SOURCE_LOCATION (decl
) = location
;
7504 if (TREE_CODE (type
) == METHOD_TYPE
)
7507 parm
= build_this_parm (type
, quals
);
7508 DECL_CHAIN (parm
) = parms
;
7511 DECL_ARGUMENTS (decl
) = parms
;
7512 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7513 DECL_CONTEXT (t
) = decl
;
7514 /* Propagate volatile out from type to decl. */
7515 if (TYPE_VOLATILE (type
))
7516 TREE_THIS_VOLATILE (decl
) = 1;
7518 /* Setup decl according to sfk. */
7521 case sfk_constructor
:
7522 case sfk_copy_constructor
:
7523 case sfk_move_constructor
:
7524 DECL_CONSTRUCTOR_P (decl
) = 1;
7526 case sfk_destructor
:
7527 DECL_DESTRUCTOR_P (decl
) = 1;
7533 /* If pointers to member functions use the least significant bit to
7534 indicate whether a function is virtual, ensure a pointer
7535 to this function will have that bit clear. */
7536 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7537 && TREE_CODE (type
) == METHOD_TYPE
7538 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7539 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7542 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7546 ("defining explicit specialization %qD in friend declaration",
7550 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7551 tree args
= TREE_OPERAND (orig_declarator
, 1);
7553 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7555 /* Something like `template <class T> friend void f<T>()'. */
7556 error ("invalid use of template-id %qD in declaration "
7557 "of primary template",
7563 /* A friend declaration of the form friend void f<>(). Record
7564 the information in the TEMPLATE_ID_EXPR. */
7565 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7567 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7568 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7570 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7571 if (TREE_PURPOSE (t
)
7572 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7574 error ("default arguments are not allowed in declaration "
7575 "of friend template specialization %qD",
7581 error ("%<inline%> is not allowed in declaration of friend "
7582 "template specialization %qD",
7585 error ("%<constexpr%> is not allowed in declaration of friend "
7586 "template specialization %qD",
7593 /* If this decl has namespace scope, set that up. */
7595 set_decl_namespace (decl
, in_namespace
, friendp
);
7597 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7599 /* `main' and builtins have implicit 'C' linkage. */
7600 if ((MAIN_NAME_P (declarator
)
7601 || (IDENTIFIER_LENGTH (declarator
) > 10
7602 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7603 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7604 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7605 || (targetcm
.cxx_implicit_extern_c
7606 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7607 && current_lang_name
== lang_name_cplusplus
7608 && ctype
== NULL_TREE
7609 && DECL_FILE_SCOPE_P (decl
))
7610 SET_DECL_LANGUAGE (decl
, lang_c
);
7612 /* Should probably propagate const out from type to decl I bet (mrs). */
7615 DECL_STATIC_FUNCTION_P (decl
) = 1;
7616 DECL_CONTEXT (decl
) = ctype
;
7621 DECL_CONTEXT (decl
) = ctype
;
7623 check_class_member_definition_namespace (decl
);
7626 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7628 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7629 error ("cannot declare %<::main%> to be a template");
7631 error ("cannot declare %<::main%> to be inline");
7633 error ("cannot declare %<::main%> to be constexpr");
7635 error ("cannot declare %<::main%> to be static");
7640 /* Members of anonymous types and local classes have no linkage; make
7641 them internal. If a typedef is made later, this will be changed. */
7642 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7643 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7646 if (publicp
&& cxx_dialect
== cxx98
)
7648 /* [basic.link]: A name with no linkage (notably, the name of a class
7649 or enumeration declared in a local scope) shall not be used to
7650 declare an entity with linkage.
7652 DR 757 relaxes this restriction for C++0x. */
7653 no_linkage_error (decl
);
7656 TREE_PUBLIC (decl
) = publicp
;
7659 DECL_INTERFACE_KNOWN (decl
) = 1;
7660 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7663 /* If the declaration was declared inline, mark it as such. */
7665 DECL_DECLARED_INLINE_P (decl
) = 1;
7667 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7669 DECL_EXTERNAL (decl
) = 1;
7670 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7675 ? G_("static member function %qD cannot have cv-qualifier")
7676 : G_("non-member function %qD cannot have cv-qualifier"),
7678 quals
= TYPE_UNQUALIFIED
;
7684 ? G_("static member function %qD cannot have ref-qualifier")
7685 : G_("non-member function %qD cannot have ref-qualifier"),
7687 rqual
= REF_QUAL_NONE
;
7691 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7692 && !grok_op_properties (decl
, /*complain=*/true))
7694 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7696 bool long_long_unsigned_p
;
7698 const char *suffix
= NULL
;
7699 /* [over.literal]/6: Literal operators shall not have C linkage. */
7700 if (DECL_LANGUAGE (decl
) == lang_c
)
7702 error ("literal operator with C linkage");
7706 if (DECL_NAMESPACE_SCOPE_P (decl
))
7708 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7711 error ("%qD has invalid argument list", decl
);
7715 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7716 if (long_long_unsigned_p
)
7718 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7719 warning (0, "integer suffix %<%s%>"
7720 " shadowed by implementation", suffix
);
7722 else if (long_double_p
)
7724 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7725 warning (0, "floating point suffix %<%s%>"
7726 " shadowed by implementation", suffix
);
7731 error ("%qD must be a non-member function", decl
);
7737 /* Make the init_value nonzero so pushdecl knows this is not
7738 tentative. error_mark_node is replaced later with the BLOCK. */
7739 DECL_INITIAL (decl
) = error_mark_node
;
7741 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7742 TREE_NOTHROW (decl
) = 1;
7744 if (flag_openmp
|| flag_cilkplus
)
7746 /* Adjust "omp declare simd" attributes. */
7747 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7751 for (attr
= ods
; attr
;
7752 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7754 if (TREE_CODE (type
) == METHOD_TYPE
)
7755 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7756 DECL_ARGUMENTS (decl
), NULL
);
7757 if (TREE_VALUE (attr
) != NULL_TREE
)
7759 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7760 cl
= c_omp_declare_simd_clauses_to_numbers
7761 (DECL_ARGUMENTS (decl
), cl
);
7763 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7765 TREE_VALUE (attr
) = NULL_TREE
;
7771 /* Caller will do the rest of this. */
7775 if (ctype
!= NULL_TREE
)
7776 grokclassfn (ctype
, decl
, flags
);
7779 if (cxx_dialect
>= cxx11
7780 && DECL_DESTRUCTOR_P (decl
)
7781 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7782 && !processing_template_decl
)
7783 deduce_noexcept_on_destructor (decl
);
7785 decl
= check_explicit_specialization (orig_declarator
, decl
,
7788 4 * (friendp
!= 0));
7789 if (decl
== error_mark_node
)
7792 if (DECL_STATIC_FUNCTION_P (decl
))
7793 check_static_quals (decl
, quals
);
7797 cplus_decl_attributes (&decl
, *attrlist
, 0);
7798 *attrlist
= NULL_TREE
;
7801 /* Check main's type after attributes have been applied. */
7802 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7804 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7807 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7809 error ("%<::main%> must return %<int%>");
7810 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7811 TREE_TYPE (decl
) = newtype
;
7814 check_main_parameter_types (decl
);
7817 if (ctype
!= NULL_TREE
7818 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7821 tree old_decl
= check_classfn (ctype
, decl
,
7822 (processing_template_decl
7823 > template_class_depth (ctype
))
7824 ? current_template_parms
7827 if (old_decl
== error_mark_node
)
7835 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7836 /* Because grokfndecl is always supposed to return a
7837 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7838 here. We depend on our callers to figure out that its
7839 really a template that's being returned. */
7840 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7842 if (DECL_STATIC_FUNCTION_P (old_decl
)
7843 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7845 /* Remove the `this' parm added by grokclassfn. */
7846 revert_static_member_fn (decl
);
7847 check_static_quals (decl
, quals
);
7849 if (DECL_ARTIFICIAL (old_decl
))
7851 error ("definition of implicitly-declared %qD", old_decl
);
7854 else if (DECL_DEFAULTED_FN (old_decl
))
7856 error ("definition of explicitly-defaulted %q+D", decl
);
7857 error ("%q+#D explicitly defaulted here", old_decl
);
7861 /* Since we've smashed OLD_DECL to its
7862 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7863 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7864 decl
= DECL_TEMPLATE_RESULT (decl
);
7866 /* Attempt to merge the declarations. This can fail, in
7867 the case of some invalid specialization declarations. */
7868 pushed_scope
= push_scope (ctype
);
7869 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7871 pop_scope (pushed_scope
);
7874 error ("no %q#D member function declared in class %qT",
7878 if (ok
== error_mark_node
)
7884 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7887 if (ctype
== NULL_TREE
|| check
)
7891 DECL_VIRTUAL_P (decl
) = 1;
7896 /* decl is a FUNCTION_DECL.
7897 specifiers are the parsed virt-specifiers.
7899 Set flags to reflect the virt-specifiers.
7904 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7906 if (decl
== NULL_TREE
)
7908 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7909 DECL_OVERRIDE_P (decl
) = 1;
7910 if (specifiers
& VIRT_SPEC_FINAL
)
7911 DECL_FINAL_P (decl
) = 1;
7915 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7916 the linkage that DECL will receive in the object file. */
7919 set_linkage_for_static_data_member (tree decl
)
7921 /* A static data member always has static storage duration and
7922 external linkage. Note that static data members are forbidden in
7923 local classes -- the only situation in which a class has
7924 non-external linkage. */
7925 TREE_PUBLIC (decl
) = 1;
7926 TREE_STATIC (decl
) = 1;
7927 /* For non-template classes, static data members are always put
7928 out in exactly those files where they are defined, just as
7929 with ordinary namespace-scope variables. */
7930 if (!processing_template_decl
)
7931 DECL_INTERFACE_KNOWN (decl
) = 1;
7934 /* Create a VAR_DECL named NAME with the indicated TYPE.
7936 If SCOPE is non-NULL, it is the class type or namespace containing
7937 the variable. If SCOPE is NULL, the variable should is created in
7938 the innermost enclosing scope. */
7941 grokvardecl (tree type
,
7943 const cp_decl_specifier_seq
*declspecs
,
7949 tree explicit_scope
;
7951 gcc_assert (!name
|| identifier_p (name
));
7953 /* Compute the scope in which to place the variable, but remember
7954 whether or not that scope was explicitly specified by the user. */
7955 explicit_scope
= scope
;
7958 /* An explicit "extern" specifier indicates a namespace-scope
7960 if (declspecs
->storage_class
== sc_extern
)
7961 scope
= current_decl_namespace ();
7962 else if (!at_function_scope_p ())
7963 scope
= current_scope ();
7967 && (/* If the variable is a namespace-scope variable declared in a
7968 template, we need DECL_LANG_SPECIFIC. */
7969 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7970 /* Similarly for namespace-scope variables with language linkage
7972 || (TREE_CODE (scope
) == NAMESPACE_DECL
7973 && current_lang_name
!= lang_name_cplusplus
)
7974 /* Similarly for static data members. */
7976 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7978 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7980 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7981 set_decl_namespace (decl
, explicit_scope
, 0);
7983 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7985 if (declspecs
->storage_class
== sc_extern
)
7987 DECL_THIS_EXTERN (decl
) = 1;
7988 DECL_EXTERNAL (decl
) = !initialized
;
7991 if (DECL_CLASS_SCOPE_P (decl
))
7993 set_linkage_for_static_data_member (decl
);
7994 /* This function is only called with out-of-class definitions. */
7995 DECL_EXTERNAL (decl
) = 0;
7996 check_class_member_definition_namespace (decl
);
7998 /* At top level, either `static' or no s.c. makes a definition
7999 (perhaps tentative), and absence of `static' makes it public. */
8000 else if (toplevel_bindings_p ())
8002 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8003 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8004 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8006 /* Not at top level, only `static' makes a static definition. */
8009 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8010 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8013 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8015 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8016 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8017 if (declspecs
->gnu_thread_keyword_p
)
8018 DECL_GNU_TLS_P (decl
) = true;
8021 /* If the type of the decl has no linkage, make sure that we'll
8022 notice that in mark_used. */
8023 if (cxx_dialect
> cxx98
8024 && decl_linkage (decl
) != lk_none
8025 && DECL_LANG_SPECIFIC (decl
) == NULL
8026 && !DECL_EXTERN_C_P (decl
)
8027 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8028 retrofit_lang_decl (decl
);
8030 if (TREE_PUBLIC (decl
))
8032 /* [basic.link]: A name with no linkage (notably, the name of a class
8033 or enumeration declared in a local scope) shall not be used to
8034 declare an entity with linkage.
8036 DR 757 relaxes this restriction for C++0x. */
8037 if (cxx_dialect
< cxx11
)
8038 no_linkage_error (decl
);
8041 DECL_INTERFACE_KNOWN (decl
) = 1;
8046 /* Create and return a canonical pointer to member function type, for
8047 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8050 build_ptrmemfunc_type (tree type
)
8054 tree unqualified_variant
= NULL_TREE
;
8056 if (type
== error_mark_node
)
8059 /* If a canonical type already exists for this type, use it. We use
8060 this method instead of type_hash_canon, because it only does a
8061 simple equality check on the list of field members. */
8063 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8066 /* Make sure that we always have the unqualified pointer-to-member
8068 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8070 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8072 t
= make_node (RECORD_TYPE
);
8074 /* Let the front end know this is a pointer to member function. */
8075 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8077 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8080 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8082 DECL_CHAIN (field
) = fields
;
8085 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8087 /* Zap out the name so that the back end will give us the debugging
8088 information for this anonymous RECORD_TYPE. */
8089 TYPE_NAME (t
) = NULL_TREE
;
8091 /* If this is not the unqualified form of this pointer-to-member
8092 type, set the TYPE_MAIN_VARIANT for this type to be the
8093 unqualified type. Since they are actually RECORD_TYPEs that are
8094 not variants of each other, we must do this manually.
8095 As we just built a new type there is no need to do yet another copy. */
8096 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8098 int type_quals
= cp_type_quals (type
);
8099 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
8100 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
8101 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
8102 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
8103 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
8104 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
8107 /* Cache this pointer-to-member type so that we can find it again
8109 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8111 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8112 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8113 else if (TYPE_CANONICAL (type
) != type
)
8114 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8119 /* Create and return a pointer to data member type. */
8122 build_ptrmem_type (tree class_type
, tree member_type
)
8124 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8126 cp_cv_quals quals
= type_memfn_quals (member_type
);
8127 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8128 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8129 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8133 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8134 return build_offset_type (class_type
, member_type
);
8138 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8139 Check to see that the definition is valid. Issue appropriate error
8140 messages. Return 1 if the definition is particularly bad, or 0
8144 check_static_variable_definition (tree decl
, tree type
)
8146 /* Can't check yet if we don't know the type. */
8147 if (dependent_type_p (type
))
8149 /* If DECL is declared constexpr, we'll do the appropriate checks
8150 in check_initializer. */
8151 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8153 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8155 if (!COMPLETE_TYPE_P (type
))
8156 error ("in-class initialization of static data member %q#D of "
8157 "incomplete type", decl
);
8158 else if (literal_type_p (type
))
8159 permerror (input_location
,
8160 "%<constexpr%> needed for in-class initialization of "
8161 "static data member %q#D of non-integral type", decl
);
8163 error ("in-class initialization of static data member %q#D of "
8164 "non-literal type", decl
);
8168 /* Motion 10 at San Diego: If a static const integral data member is
8169 initialized with an integral constant expression, the initializer
8170 may appear either in the declaration (within the class), or in
8171 the definition, but not both. If it appears in the class, the
8172 member is a member constant. The file-scope definition is always
8174 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8176 error ("invalid in-class initialization of static data member "
8177 "of non-integral type %qT",
8181 else if (!CP_TYPE_CONST_P (type
))
8182 error ("ISO C++ forbids in-class initialization of non-const "
8183 "static member %qD",
8185 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8186 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8187 "%qD of non-integral type %qT", decl
, type
);
8192 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8193 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8194 expressions out into temporary variables so that walk_tree doesn't
8195 step into them (c++/15764). */
8198 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8200 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
8201 tree expr
= *expr_p
;
8202 if (TREE_CODE (expr
) == SAVE_EXPR
)
8204 tree op
= TREE_OPERAND (expr
, 0);
8205 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8206 if (TREE_SIDE_EFFECTS (op
))
8207 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8210 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8215 /* Entry point for the above. */
8218 stabilize_vla_size (tree size
)
8220 struct pointer_set_t
*pset
= pointer_set_create ();
8221 /* Break out any function calls into temporary variables. */
8222 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
8223 pointer_set_destroy (pset
);
8226 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8227 not inside of SAVE_EXPR and fold them. */
8230 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8232 tree expr
= *expr_p
;
8233 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8235 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8237 *(bool *)data
= true;
8238 if (SIZEOF_EXPR_TYPE_P (expr
))
8239 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8240 SIZEOF_EXPR
, false);
8241 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8242 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8245 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8247 if (expr
== error_mark_node
)
8248 expr
= size_one_node
;
8255 /* Given the SIZE (i.e., number of elements) in an array, compute an
8256 appropriate index type for the array. If non-NULL, NAME is the
8257 name of the thing being declared. */
8260 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8265 if (error_operand_p (size
))
8266 return error_mark_node
;
8268 if (!type_dependent_expression_p (size
))
8270 tree type
= TREE_TYPE (size
);
8272 mark_rvalue_use (size
);
8274 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8275 && TREE_SIDE_EFFECTS (size
))
8276 /* In C++98, we mark a non-constant array bound with a magic
8277 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8280 size
= fold_non_dependent_expr_sfinae (size
, complain
);
8282 if (CLASS_TYPE_P (type
)
8283 && CLASSTYPE_LITERAL_P (type
))
8285 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8288 if (!(complain
& tf_error
))
8289 return error_mark_node
;
8291 error ("size of array %qD has non-integral type %qT",
8294 error ("size of array has non-integral type %qT", type
);
8295 size
= integer_one_node
;
8297 if (size
== error_mark_node
)
8298 return error_mark_node
;
8299 type
= TREE_TYPE (size
);
8302 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8303 size
= maybe_constant_value (size
);
8305 if (!TREE_CONSTANT (size
))
8309 if (error_operand_p (size
))
8310 return error_mark_node
;
8312 /* The array bound must be an integer type. */
8313 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8315 if (!(complain
& tf_error
))
8316 return error_mark_node
;
8318 error ("size of array %qD has non-integral type %qT", name
, type
);
8320 error ("size of array has non-integral type %qT", type
);
8321 size
= integer_one_node
;
8322 type
= TREE_TYPE (size
);
8326 /* A type is dependent if it is...an array type constructed from any
8327 dependent type or whose size is specified by a constant expression
8328 that is value-dependent. */
8329 /* We can only call value_dependent_expression_p on integral constant
8330 expressions; treat non-constant expressions as dependent, too. */
8331 if (processing_template_decl
8332 && (type_dependent_expression_p (size
)
8333 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8335 /* We cannot do any checking for a SIZE that isn't known to be
8336 constant. Just build the index type and mark that it requires
8337 structural equality checks. */
8338 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8339 size
, size_one_node
));
8340 TYPE_DEPENDENT_P (itype
) = 1;
8341 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8342 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8346 /* Normally, the array-bound will be a constant. */
8347 if (TREE_CODE (size
) == INTEGER_CST
)
8349 /* Check to see if the array bound overflowed. Make that an
8350 error, no matter how generous we're being. */
8351 constant_expression_error (size
);
8353 /* An array must have a positive number of elements. */
8354 if (tree_int_cst_lt (size
, integer_zero_node
))
8356 if (!(complain
& tf_error
))
8357 return error_mark_node
;
8359 error ("size of array %qD is negative", name
);
8361 error ("size of array is negative");
8362 size
= integer_one_node
;
8364 /* As an extension we allow zero-sized arrays. */
8365 else if (integer_zerop (size
))
8367 if (!(complain
& tf_error
))
8368 /* We must fail if performing argument deduction (as
8369 indicated by the state of complain), so that
8370 another substitution can be found. */
8371 return error_mark_node
;
8372 else if (in_system_header_at (input_location
))
8373 /* Allow them in system headers because glibc uses them. */;
8375 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8377 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8380 else if (TREE_CONSTANT (size
)
8381 /* We don't allow VLAs at non-function scopes, or during
8382 tentative template substitution. */
8383 || !at_function_scope_p ()
8384 || (cxx_dialect
< cxx1y
&& !(complain
& tf_error
)))
8386 if (!(complain
& tf_error
))
8387 return error_mark_node
;
8388 /* `(int) &fn' is not a valid array bound. */
8390 error ("size of array %qD is not an integral constant-expression",
8393 error ("size of array is not an integral constant-expression");
8394 size
= integer_one_node
;
8396 else if (cxx_dialect
< cxx1y
&& pedantic
&& warn_vla
!= 0)
8399 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8401 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8403 else if (warn_vla
> 0)
8407 "variable length array %qD is used", name
);
8410 "variable length array is used");
8413 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8414 /* A variable sized array. */
8415 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8418 HOST_WIDE_INT saved_processing_template_decl
;
8420 /* Compute the index of the largest element in the array. It is
8421 one less than the number of elements in the array. We save
8422 and restore PROCESSING_TEMPLATE_DECL so that computations in
8423 cp_build_binary_op will be appropriately folded. */
8424 saved_processing_template_decl
= processing_template_decl
;
8425 processing_template_decl
= 0;
8426 itype
= cp_build_binary_op (input_location
,
8428 cp_convert (ssizetype
, size
, complain
),
8429 cp_convert (ssizetype
, integer_one_node
,
8432 itype
= fold (itype
);
8433 processing_template_decl
= saved_processing_template_decl
;
8435 if (!TREE_CONSTANT (itype
))
8437 /* A variable sized array. */
8438 itype
= variable_size (itype
);
8440 if (TREE_CODE (itype
) != SAVE_EXPR
)
8442 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8443 they might survive till gimplification. */
8444 tree newitype
= itype
;
8446 cp_walk_tree_without_duplicates (&newitype
,
8447 fold_sizeof_expr_r
, &found
);
8449 itype
= variable_size (fold (newitype
));
8452 stabilize_vla_size (itype
);
8454 if (cxx_dialect
>= cxx1y
&& flag_exceptions
)
8456 /* If the VLA bound is larger than half the address space,
8457 or less than zero, throw std::bad_array_length. */
8458 tree comp
= build2 (LT_EXPR
, boolean_type_node
, itype
,
8460 comp
= build3 (COND_EXPR
, void_type_node
, comp
,
8461 throw_bad_array_length (), void_node
);
8462 finish_expr_stmt (comp
);
8464 else if (flag_sanitize
& SANITIZE_VLA
8465 && current_function_decl
!= NULL_TREE
8466 && !lookup_attribute ("no_sanitize_undefined",
8468 (current_function_decl
)))
8470 /* From C++1y onwards, we throw an exception on a negative
8471 length size of an array; see above. */
8473 /* We have to add 1 -- in the ubsan routine we generate
8474 LE_EXPR rather than LT_EXPR. */
8475 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8476 build_one_cst (TREE_TYPE (itype
)));
8477 t
= ubsan_instrument_vla (input_location
, t
);
8478 finish_expr_stmt (t
);
8481 /* Make sure that there was no overflow when creating to a signed
8482 index type. (For example, on a 32-bit machine, an array with
8483 size 2^32 - 1 is too big.) */
8484 else if (TREE_CODE (itype
) == INTEGER_CST
8485 && TREE_OVERFLOW (itype
))
8487 if (!(complain
& tf_error
))
8488 return error_mark_node
;
8489 error ("overflow in array dimension");
8490 TREE_OVERFLOW (itype
) = 0;
8494 /* Create and return the appropriate index type. */
8495 itype
= build_index_type (itype
);
8497 /* If the index type were dependent, we would have returned early, so
8498 remember that it isn't. */
8499 TYPE_DEPENDENT_P (itype
) = 0;
8500 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8504 /* Returns the scope (if any) in which the entity declared by
8505 DECLARATOR will be located. If the entity was declared with an
8506 unqualified name, NULL_TREE is returned. */
8509 get_scope_of_declarator (const cp_declarator
*declarator
)
8511 while (declarator
&& declarator
->kind
!= cdk_id
)
8512 declarator
= declarator
->declarator
;
8514 /* If the declarator-id is a SCOPE_REF, the scope in which the
8515 declaration occurs is the first operand. */
8517 && declarator
->u
.id
.qualifying_scope
)
8518 return declarator
->u
.id
.qualifying_scope
;
8520 /* Otherwise, the declarator is not a qualified name; the entity will
8521 be declared in the current scope. */
8525 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8526 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8530 create_array_type_for_decl (tree name
, tree type
, tree size
)
8532 tree itype
= NULL_TREE
;
8534 /* If things have already gone awry, bail now. */
8535 if (type
== error_mark_node
|| size
== error_mark_node
)
8536 return error_mark_node
;
8538 /* 8.3.4/1: If the type of the identifier of D contains the auto
8539 type-specifier, the program is ill-formed. */
8540 if (type_uses_auto (type
))
8542 error ("%qD declared as array of %qT", name
, type
);
8543 return error_mark_node
;
8546 /* If there are some types which cannot be array elements,
8547 issue an error-message and return. */
8548 switch (TREE_CODE (type
))
8552 error ("declaration of %qD as array of void", name
);
8554 error ("creating array of void");
8555 return error_mark_node
;
8559 error ("declaration of %qD as array of functions", name
);
8561 error ("creating array of functions");
8562 return error_mark_node
;
8564 case REFERENCE_TYPE
:
8566 error ("declaration of %qD as array of references", name
);
8568 error ("creating array of references");
8569 return error_mark_node
;
8573 error ("declaration of %qD as array of function members", name
);
8575 error ("creating array of function members");
8576 return error_mark_node
;
8584 The constant expressions that specify the bounds of the arrays
8585 can be omitted only for the first member of the sequence. */
8586 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8589 error ("declaration of %qD as multidimensional array must "
8590 "have bounds for all dimensions except the first",
8593 error ("multidimensional array must have bounds for all "
8594 "dimensions except the first");
8596 return error_mark_node
;
8599 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
)
8600 && (flag_iso
|| warn_vla
> 0))
8601 pedwarn (input_location
, OPT_Wvla
, "array of array of runtime bound");
8603 /* Figure out the index type for the array. */
8605 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8608 T is called the array element type; this type shall not be [...] an
8609 abstract class type. */
8610 abstract_virtuals_error (name
, type
);
8612 return build_cplus_array_type (type
, itype
);
8615 /* Check that it's OK to declare a function with the indicated TYPE.
8616 SFK indicates the kind of special function (if any) that this
8617 function is. OPTYPE is the type given in a conversion operator
8618 declaration, or the class type for a constructor/destructor.
8619 Returns the actual return type of the function; that
8620 may be different than TYPE if an error occurs, or for certain
8621 special functions. */
8624 check_special_function_return_type (special_function_kind sfk
,
8630 case sfk_constructor
:
8632 error ("return type specification for constructor invalid");
8634 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8635 type
= build_pointer_type (optype
);
8637 type
= void_type_node
;
8640 case sfk_destructor
:
8642 error ("return type specification for destructor invalid");
8643 /* We can't use the proper return type here because we run into
8644 problems with ambiguous bases and covariant returns.
8645 Java classes are left unchanged because (void *) isn't a valid
8646 Java type, and we don't want to change the Java ABI. */
8647 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8648 type
= build_pointer_type (void_type_node
);
8650 type
= void_type_node
;
8653 case sfk_conversion
:
8655 error ("return type specified for %<operator %T%>", optype
);
8666 /* A variable or data member (whose unqualified name is IDENTIFIER)
8667 has been declared with the indicated TYPE. If the TYPE is not
8668 acceptable, issue an error message and return a type to use for
8669 error-recovery purposes. */
8672 check_var_type (tree identifier
, tree type
)
8674 if (VOID_TYPE_P (type
))
8677 error ("unnamed variable or field declared void");
8678 else if (identifier_p (identifier
))
8680 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8681 error ("variable or field %qE declared void", identifier
);
8684 error ("variable or field declared void");
8685 type
= error_mark_node
;
8691 /* Given declspecs and a declarator (abstract or otherwise), determine
8692 the name and type of the object declared and construct a DECL node
8695 DECLSPECS points to the representation of declaration-specifier
8696 sequence that precedes declarator.
8698 DECL_CONTEXT says which syntactic context this declaration is in:
8699 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8700 FUNCDEF for a function definition. Like NORMAL but a few different
8701 error messages in each case. Return value may be zero meaning
8702 this definition is too screwy to try to parse.
8703 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8704 handle member functions (which have FIELD context).
8705 Return value may be zero meaning this definition is too screwy to
8707 PARM for a parameter declaration (either within a function prototype
8708 or before a function body). Make a PARM_DECL, or return void_type_node.
8709 TPARM for a template parameter declaration.
8710 CATCHPARM for a parameter declaration before a catch clause.
8711 TYPENAME if for a typename (in a cast or sizeof).
8712 Don't make a DECL node; just return the ..._TYPE node.
8713 FIELD for a struct or union field; make a FIELD_DECL.
8714 BITFIELD for a field with specified width.
8716 INITIALIZED is as for start_decl.
8718 ATTRLIST is a pointer to the list of attributes, which may be NULL
8719 if there are none; *ATTRLIST may be modified if attributes from inside
8720 the declarator should be applied to the declaration.
8722 When this function is called, scoping variables (such as
8723 CURRENT_CLASS_TYPE) should reflect the scope in which the
8724 declaration occurs, not the scope in which the new declaration will
8725 be placed. For example, on:
8729 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8732 Returns a DECL (if a declarator is present), a TYPE (if there is no
8733 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8737 grokdeclarator (const cp_declarator
*declarator
,
8738 cp_decl_specifier_seq
*declspecs
,
8739 enum decl_context decl_context
,
8743 tree type
= NULL_TREE
;
8745 int explicit_int128
= 0;
8746 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8747 int explicit_int
= 0;
8748 int explicit_char
= 0;
8749 int defaulted_int
= 0;
8751 tree typedef_decl
= NULL_TREE
;
8752 const char *name
= NULL
;
8753 tree typedef_type
= NULL_TREE
;
8754 /* True if this declarator is a function definition. */
8755 bool funcdef_flag
= false;
8756 cp_declarator_kind innermost_code
= cdk_error
;
8759 /* See the code below that used this. */
8760 tree decl_attr
= NULL_TREE
;
8763 /* Keep track of what sort of function is being processed
8764 so that we can warn about default return values, or explicit
8765 return values which do not match prescribed defaults. */
8766 special_function_kind sfk
= sfk_none
;
8768 tree dname
= NULL_TREE
;
8769 tree ctor_return_type
= NULL_TREE
;
8770 enum overload_flags flags
= NO_SPECIAL
;
8771 /* cv-qualifiers that apply to the declarator, for a declaration of
8772 a member function. */
8773 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8774 /* virt-specifiers that apply to the declarator, for a declaration of
8775 a member function. */
8776 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8777 /* ref-qualifier that applies to the declarator, for a declaration of
8778 a member function. */
8779 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8780 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8782 tree raises
= NULL_TREE
;
8783 int template_count
= 0;
8784 tree returned_attrs
= NULL_TREE
;
8785 tree parms
= NULL_TREE
;
8786 const cp_declarator
*id_declarator
;
8787 /* The unqualified name of the declarator; either an
8788 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8789 tree unqualified_id
;
8790 /* The class type, if any, in which this entity is located,
8791 or NULL_TREE if none. Note that this value may be different from
8792 the current class type; for example if an attempt is made to declare
8793 "A::f" inside "B", this value will be "A". */
8794 tree ctype
= current_class_type
;
8795 /* The NAMESPACE_DECL for the namespace in which this entity is
8796 located. If an unqualified name is used to declare the entity,
8797 this value will be NULL_TREE, even if the entity is located at
8799 tree in_namespace
= NULL_TREE
;
8800 cp_storage_class storage_class
;
8801 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8802 bool type_was_error_mark_node
= false;
8803 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8804 bool template_type_arg
= false;
8805 bool template_parm_flag
= false;
8806 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8807 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8808 bool late_return_type_p
= false;
8809 bool array_parameter_p
= false;
8810 source_location saved_loc
= input_location
;
8813 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8814 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8815 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8816 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8817 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8818 explicit_int128
= declspecs
->explicit_int128_p
;
8819 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8821 if (decl_context
== FUNCDEF
)
8822 funcdef_flag
= true, decl_context
= NORMAL
;
8823 else if (decl_context
== MEMFUNCDEF
)
8824 funcdef_flag
= true, decl_context
= FIELD
;
8825 else if (decl_context
== BITFIELD
)
8826 bitfield
= 1, decl_context
= FIELD
;
8827 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8828 template_type_arg
= true, decl_context
= TYPENAME
;
8829 else if (decl_context
== TPARM
)
8830 template_parm_flag
= true, decl_context
= PARM
;
8832 if (initialized
> 1)
8833 funcdef_flag
= true;
8835 /* Look inside a declarator for the name being declared
8836 and get it as a string, for an error message. */
8837 for (id_declarator
= declarator
;
8839 id_declarator
= id_declarator
->declarator
)
8841 if (id_declarator
->kind
!= cdk_id
)
8842 innermost_code
= id_declarator
->kind
;
8844 switch (id_declarator
->kind
)
8847 if (id_declarator
->declarator
8848 && id_declarator
->declarator
->kind
== cdk_id
)
8850 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8851 if (sfk
== sfk_destructor
)
8858 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8859 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8862 if (qualifying_scope
)
8864 if (at_function_scope_p ())
8868 A declarator-id shall not be qualified except
8871 None of the cases are permitted in block
8873 if (qualifying_scope
== global_namespace
)
8874 error ("invalid use of qualified-name %<::%D%>",
8876 else if (TYPE_P (qualifying_scope
))
8877 error ("invalid use of qualified-name %<%T::%D%>",
8878 qualifying_scope
, decl
);
8880 error ("invalid use of qualified-name %<%D::%D%>",
8881 qualifying_scope
, decl
);
8882 return error_mark_node
;
8884 else if (TYPE_P (qualifying_scope
))
8886 ctype
= qualifying_scope
;
8887 if (!MAYBE_CLASS_TYPE_P (ctype
))
8889 error ("%q#T is not a class or a namespace", ctype
);
8892 else if (innermost_code
!= cdk_function
8893 && current_class_type
8894 && !uniquely_derived_from_p (ctype
,
8895 current_class_type
))
8897 error ("invalid use of qualified-name %<%T::%D%>",
8898 qualifying_scope
, decl
);
8899 return error_mark_node
;
8902 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8903 in_namespace
= qualifying_scope
;
8905 switch (TREE_CODE (decl
))
8911 if (innermost_code
!= cdk_function
)
8913 error ("declaration of %qD as non-function", decl
);
8914 return error_mark_node
;
8916 else if (!qualifying_scope
8917 && !(current_class_type
&& at_class_scope_p ()))
8919 error ("declaration of %qD as non-member", decl
);
8920 return error_mark_node
;
8923 type
= TREE_OPERAND (decl
, 0);
8925 type
= constructor_name (type
);
8926 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8931 case TEMPLATE_ID_EXPR
:
8933 tree fns
= TREE_OPERAND (decl
, 0);
8936 if (!identifier_p (dname
))
8938 gcc_assert (is_overloaded_fn (dname
));
8939 dname
= DECL_NAME (get_first_fn (dname
));
8944 case IDENTIFIER_NODE
:
8945 if (identifier_p (decl
))
8948 if (C_IS_RESERVED_WORD (dname
))
8950 error ("declarator-id missing; using reserved word %qD",
8952 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8954 else if (!IDENTIFIER_TYPENAME_P (dname
))
8955 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8958 gcc_assert (flags
== NO_SPECIAL
);
8959 flags
= TYPENAME_FLAG
;
8960 ctor_return_type
= TREE_TYPE (dname
);
8961 sfk
= sfk_conversion
;
8962 if (is_typename_at_global_scope (dname
))
8963 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8965 name
= "<invalid operator>";
8982 return error_mark_node
;
8987 if (id_declarator
->kind
== cdk_id
)
8993 The declarator in a function-definition shall have the form
8994 D1 ( parameter-declaration-clause) ... */
8995 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8997 error ("function definition does not declare parameters");
8998 return error_mark_node
;
9001 if (flags
== TYPENAME_FLAG
9002 && innermost_code
!= cdk_function
9003 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9005 error ("declaration of %qD as non-function", dname
);
9006 return error_mark_node
;
9010 && identifier_p (dname
)
9011 && UDLIT_OPER_P (dname
)
9012 && innermost_code
!= cdk_function
)
9014 error ("declaration of %qD as non-function", dname
);
9015 return error_mark_node
;
9018 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9022 error ("declaration of %qD as %<typedef%>", dname
);
9023 return error_mark_node
;
9025 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9027 error ("declaration of %qD as parameter", dname
);
9028 return error_mark_node
;
9032 /* Anything declared one level down from the top level
9033 must be one of the parameters of a function
9034 (because the body is at least two levels down). */
9036 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9037 by not allowing C++ class definitions to specify their parameters
9038 with xdecls (must be spec.d in the parmlist).
9040 Since we now wait to push a class scope until we are sure that
9041 we are in a legitimate method context, we must set oldcname
9042 explicitly (since current_class_name is not yet alive).
9044 We also want to avoid calling this a PARM if it is in a namespace. */
9046 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9048 cp_binding_level
*b
= current_binding_level
;
9049 current_binding_level
= b
->level_chain
;
9050 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9051 decl_context
= PARM
;
9052 current_binding_level
= b
;
9056 name
= decl_context
== PARM
? "parameter" : "type name";
9058 if (constexpr_p
&& typedef_p
)
9060 error ("%<constexpr%> cannot appear in a typedef declaration");
9061 return error_mark_node
;
9064 /* If there were multiple types specified in the decl-specifier-seq,
9065 issue an error message. */
9066 if (declspecs
->multiple_types_p
)
9068 error ("two or more data types in declaration of %qs", name
);
9069 return error_mark_node
;
9072 if (declspecs
->conflicting_specifiers_p
)
9074 error ("conflicting specifiers in declaration of %qs", name
);
9075 return error_mark_node
;
9078 /* Extract the basic type from the decl-specifier-seq. */
9079 type
= declspecs
->type
;
9080 if (type
== error_mark_node
)
9083 type_was_error_mark_node
= true;
9085 /* If the entire declaration is itself tagged as deprecated then
9086 suppress reports of deprecated items. */
9087 if (type
&& TREE_DEPRECATED (type
)
9088 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9089 warn_deprecated_use (type
, NULL_TREE
);
9090 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9092 typedef_decl
= type
;
9093 type
= TREE_TYPE (typedef_decl
);
9094 if (TREE_DEPRECATED (type
)
9095 && DECL_ARTIFICIAL (typedef_decl
)
9096 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9097 warn_deprecated_use (type
, NULL_TREE
);
9099 /* No type at all: default to `int', and set DEFAULTED_INT
9100 because it was not a user-defined typedef. */
9101 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
9103 /* These imply 'int'. */
9104 type
= integer_type_node
;
9108 explicit_int
= declspecs
->explicit_int_p
;
9109 explicit_char
= declspecs
->explicit_char_p
;
9112 /* See the code below that used this. */
9114 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9116 typedef_type
= type
;
9119 if (sfk
!= sfk_conversion
)
9120 ctor_return_type
= ctype
;
9122 if (sfk
!= sfk_none
)
9123 type
= check_special_function_return_type (sfk
, type
,
9125 else if (type
== NULL_TREE
)
9131 /* We handle `main' specially here, because 'main () { }' is so
9132 common. With no options, it is allowed. With -Wreturn-type,
9133 it is a warning. It is only an error with -pedantic-errors. */
9134 is_main
= (funcdef_flag
9135 && dname
&& identifier_p (dname
)
9136 && MAIN_NAME_P (dname
)
9137 && ctype
== NULL_TREE
9138 && in_namespace
== NULL_TREE
9139 && current_namespace
== global_namespace
);
9141 if (type_was_error_mark_node
)
9142 /* We've already issued an error, don't complain more. */;
9143 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9144 /* Allow it, sigh. */;
9146 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9148 pedwarn (input_location
, OPT_Wpedantic
,
9149 "ISO C++ forbids declaration of %qs with no type", name
);
9151 warning (OPT_Wreturn_type
,
9152 "ISO C++ forbids declaration of %qs with no type", name
);
9154 type
= integer_type_node
;
9159 if (explicit_int128
)
9161 if (int128_integer_type_node
== NULL_TREE
)
9163 error ("%<__int128%> is not supported by this target");
9164 explicit_int128
= false;
9166 else if (pedantic
&& ! in_system_header_at (input_location
))
9167 pedwarn (input_location
, OPT_Wpedantic
,
9168 "ISO C++ does not support %<__int128%> for %qs", name
);
9171 /* Now process the modifiers that were specified
9172 and check for invalid combinations. */
9174 /* Long double is a special combination. */
9175 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9178 type
= cp_build_qualified_type (long_double_type_node
,
9179 cp_type_quals (type
));
9182 /* Check all other uses of type modifiers. */
9184 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9188 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9189 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9190 else if (signed_p
&& unsigned_p
)
9191 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9192 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9193 error ("%<long long%> invalid for %qs", name
);
9194 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9195 error ("%<long%> invalid for %qs", name
);
9196 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9197 error ("%<short%> invalid for %qs", name
);
9198 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9199 error ("%<long%> or %<short%> invalid for %qs", name
);
9200 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
9201 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9202 else if ((long_p
|| short_p
) && explicit_char
)
9203 error ("%<long%> or %<short%> specified with char for %qs", name
);
9204 else if (long_p
&& short_p
)
9205 error ("%<long%> and %<short%> specified together for %qs", name
);
9206 else if (type
== char16_type_node
|| type
== char32_type_node
)
9208 if (signed_p
|| unsigned_p
)
9209 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9210 else if (short_p
|| long_p
)
9211 error ("%<short%> or %<long%> invalid for %qs", name
);
9216 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
9218 pedwarn (input_location
, OPT_Wpedantic
,
9219 "long, short, signed or unsigned used invalidly for %qs",
9221 if (flag_pedantic_errors
)
9226 /* Discard the type modifiers if they are invalid. */
9237 /* Decide whether an integer type is signed or not.
9238 Optionally treat bitfields as signed by default. */
9242 It is implementation-defined whether a plain (neither
9243 explicitly signed or unsigned) char, short, int, or long
9244 bit-field is signed or unsigned.
9246 Naturally, we extend this to long long as well. Note that
9247 this does not include wchar_t. */
9248 || (bitfield
&& !flag_signed_bitfields
9250 /* A typedef for plain `int' without `signed' can be
9251 controlled just like plain `int', but a typedef for
9252 `signed int' cannot be so controlled. */
9254 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9255 && TREE_CODE (type
) == INTEGER_TYPE
9256 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9258 if (explicit_int128
)
9259 type
= int128_unsigned_type_node
;
9261 type
= long_long_unsigned_type_node
;
9263 type
= long_unsigned_type_node
;
9265 type
= short_unsigned_type_node
;
9266 else if (type
== char_type_node
)
9267 type
= unsigned_char_type_node
;
9268 else if (typedef_decl
)
9269 type
= unsigned_type_for (type
);
9271 type
= unsigned_type_node
;
9273 else if (signed_p
&& type
== char_type_node
)
9274 type
= signed_char_type_node
;
9275 else if (explicit_int128
)
9276 type
= int128_integer_type_node
;
9278 type
= long_long_integer_type_node
;
9280 type
= long_integer_type_node
;
9282 type
= short_integer_type_node
;
9284 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9286 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9287 error ("complex invalid for %qs", name
);
9288 /* If we just have "complex", it is equivalent to
9289 "complex double", but if any modifiers at all are specified it is
9290 the complex form of TYPE. E.g, "complex short" is
9291 "complex short int". */
9292 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
9293 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
9294 type
= complex_double_type_node
;
9295 else if (type
== integer_type_node
)
9296 type
= complex_integer_type_node
;
9297 else if (type
== float_type_node
)
9298 type
= complex_float_type_node
;
9299 else if (type
== double_type_node
)
9300 type
= complex_double_type_node
;
9301 else if (type
== long_double_type_node
)
9302 type
= complex_long_double_type_node
;
9304 type
= build_complex_type (type
);
9307 type_quals
= TYPE_UNQUALIFIED
;
9308 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9309 type_quals
|= TYPE_QUAL_CONST
;
9310 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9311 type_quals
|= TYPE_QUAL_VOLATILE
;
9312 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9313 type_quals
|= TYPE_QUAL_RESTRICT
;
9314 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9315 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9318 /* If we're using the injected-class-name to form a compound type or a
9319 declaration, replace it with the underlying class so we don't get
9320 redundant typedefs in the debug output. But if we are returning the
9321 type unchanged, leave it alone so that it's available to
9322 maybe_get_template_decl_from_type_decl. */
9323 if (CLASS_TYPE_P (type
)
9324 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9325 && type
== TREE_TYPE (TYPE_NAME (type
))
9326 && (declarator
|| type_quals
))
9327 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9329 type_quals
|= cp_type_quals (type
);
9330 type
= cp_build_qualified_type_real
9331 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
9332 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9333 /* We might have ignored or rejected some of the qualifiers. */
9334 type_quals
= cp_type_quals (type
);
9337 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9338 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9339 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9341 storage_class
= declspecs
->storage_class
;
9342 if (storage_class
== sc_static
)
9343 staticp
= 1 + (decl_context
== FIELD
);
9345 if (virtualp
&& staticp
== 2)
9347 error ("member %qD cannot be declared both virtual and static", dname
);
9348 storage_class
= sc_none
;
9351 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9353 /* Issue errors about use of storage classes for parameters. */
9354 if (decl_context
== PARM
)
9358 error ("typedef declaration invalid in parameter declaration");
9359 return error_mark_node
;
9361 else if (template_parm_flag
&& storage_class
!= sc_none
)
9363 error ("storage class specified for template parameter %qs", name
);
9364 return error_mark_node
;
9366 else if (storage_class
== sc_static
9367 || storage_class
== sc_extern
9369 error ("storage class specifiers invalid in parameter declarations");
9371 /* Function parameters cannot be constexpr. If we saw one, moan
9372 and pretend it wasn't there. */
9375 error ("a parameter cannot be declared %<constexpr%>");
9380 /* Give error if `virtual' is used outside of class declaration. */
9382 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9384 error ("%<virtual%> outside class declaration");
9388 /* Static anonymous unions are dealt with here. */
9389 if (staticp
&& decl_context
== TYPENAME
9391 && ANON_AGGR_TYPE_P (declspecs
->type
))
9392 decl_context
= FIELD
;
9394 /* Warn about storage classes that are invalid for certain
9395 kinds of declarations (parameters, typenames, etc.). */
9398 && storage_class
!= sc_extern
9399 && storage_class
!= sc_static
)
9402 error ("multiple storage classes in declaration of %qs", name
);
9405 if (decl_context
!= NORMAL
9406 && ((storage_class
!= sc_none
9407 && storage_class
!= sc_mutable
)
9410 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9411 && (storage_class
== sc_register
9412 || storage_class
== sc_auto
))
9416 else if (decl_context
== FIELD
9417 /* C++ allows static class elements. */
9418 && storage_class
== sc_static
)
9419 /* C++ also allows inlines and signed and unsigned elements,
9420 but in those cases we don't come in here. */
9424 if (decl_context
== FIELD
)
9425 error ("storage class specified for %qs", name
);
9428 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9429 error ("storage class specified for parameter %qs", name
);
9431 error ("storage class specified for typename");
9433 if (storage_class
== sc_register
9434 || storage_class
== sc_auto
9435 || storage_class
== sc_extern
9437 storage_class
= sc_none
;
9440 else if (storage_class
== sc_extern
&& funcdef_flag
9441 && ! toplevel_bindings_p ())
9442 error ("nested function %qs declared %<extern%>", name
);
9443 else if (toplevel_bindings_p ())
9445 if (storage_class
== sc_auto
)
9446 error ("top-level declaration of %qs specifies %<auto%>", name
);
9449 && storage_class
!= sc_extern
9450 && storage_class
!= sc_static
)
9452 if (declspecs
->gnu_thread_keyword_p
)
9453 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9454 "declared %<__thread%>", name
);
9456 /* When thread_local is applied to a variable of block scope the
9457 storage-class-specifier static is implied if it does not appear
9459 storage_class
= declspecs
->storage_class
= sc_static
;
9463 if (storage_class
&& friendp
)
9465 error ("storage class specifiers invalid in friend function declarations");
9466 storage_class
= sc_none
;
9471 unqualified_id
= NULL_TREE
;
9474 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9475 switch (TREE_CODE (unqualified_id
))
9478 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9479 if (TYPE_P (unqualified_id
))
9480 unqualified_id
= constructor_name (unqualified_id
);
9483 case IDENTIFIER_NODE
:
9484 case TEMPLATE_ID_EXPR
:
9492 if (declspecs
->std_attributes
)
9494 /* Apply the c++11 attributes to the type preceding them. */
9495 input_location
= declspecs
->locations
[ds_std_attribute
];
9496 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9497 input_location
= saved_loc
;
9500 /* Determine the type of the entity declared by recurring on the
9502 for (; declarator
; declarator
= declarator
->declarator
)
9504 const cp_declarator
*inner_declarator
;
9507 if (type
== error_mark_node
)
9508 return error_mark_node
;
9510 attrs
= declarator
->attributes
;
9516 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9517 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9518 if (declarator
->kind
== cdk_function
)
9519 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9520 if (declarator
->kind
== cdk_array
)
9521 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9522 returned_attrs
= decl_attributes (&type
,
9523 chainon (returned_attrs
, attrs
),
9527 if (declarator
->kind
== cdk_id
)
9530 inner_declarator
= declarator
->declarator
;
9532 switch (declarator
->kind
)
9535 type
= create_array_type_for_decl (dname
, type
,
9536 declarator
->u
.array
.bounds
);
9537 if (declarator
->std_attributes
)
9540 The optional attribute-specifier-seq appertains to the
9542 returned_attrs
= chainon (returned_attrs
,
9543 declarator
->std_attributes
);
9551 /* Declaring a function type.
9552 Make sure we have a valid type for the function to return. */
9554 if (type_quals
!= TYPE_UNQUALIFIED
)
9556 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9557 warning (OPT_Wignored_qualifiers
,
9558 "type qualifiers ignored on function return type");
9559 /* We now know that the TYPE_QUALS don't apply to the
9560 decl, but to its return type. */
9561 type_quals
= TYPE_UNQUALIFIED
;
9563 errmsg
= targetm
.invalid_return_type (type
);
9567 type
= integer_type_node
;
9570 /* Error about some types functions can't return. */
9572 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9574 error ("%qs declared as function returning a function", name
);
9575 return error_mark_node
;
9577 if (TREE_CODE (type
) == ARRAY_TYPE
)
9579 error ("%qs declared as function returning an array", name
);
9580 return error_mark_node
;
9583 input_location
= declspecs
->locations
[ds_type_spec
];
9584 abstract_virtuals_error (ACU_RETURN
, type
);
9585 input_location
= saved_loc
;
9587 /* Pick up type qualifiers which should be applied to `this'. */
9588 memfn_quals
= declarator
->u
.function
.qualifiers
;
9589 /* Pick up virt-specifiers. */
9590 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9591 /* And ref-qualifier, too */
9592 rqual
= declarator
->u
.function
.ref_qualifier
;
9593 /* Pick up the exception specifications. */
9594 raises
= declarator
->u
.function
.exception_specification
;
9595 /* If the exception-specification is ill-formed, let's pretend
9596 there wasn't one. */
9597 if (raises
== error_mark_node
)
9600 /* Say it's a definition only for the CALL_EXPR
9601 closest to the identifier. */
9602 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9604 /* Handle a late-specified return type. */
9607 if (type_uses_auto (type
))
9609 if (!declarator
->u
.function
.late_return_type
)
9611 if (current_class_type
9612 && LAMBDA_TYPE_P (current_class_type
))
9613 /* OK for C++11 lambdas. */;
9614 else if (cxx_dialect
< cxx1y
)
9616 error ("%qs function uses "
9617 "%<auto%> type specifier without trailing "
9618 "return type", name
);
9619 inform (input_location
, "deduced return type "
9620 "only available with -std=c++1y or "
9625 error ("virtual function cannot "
9626 "have deduced return type");
9630 else if (!is_auto (type
))
9632 error ("%qs function with trailing return type has"
9633 " %qT as its type rather than plain %<auto%>",
9635 return error_mark_node
;
9638 else if (declarator
->u
.function
.late_return_type
)
9640 if (cxx_dialect
< cxx11
)
9641 /* Not using maybe_warn_cpp0x because this should
9642 always be an error. */
9643 error ("trailing return type only available with "
9644 "-std=c++11 or -std=gnu++11");
9646 error ("%qs function with trailing return type not "
9647 "declared with %<auto%> type specifier", name
);
9648 return error_mark_node
;
9651 type
= splice_late_return_type
9652 (type
, declarator
->u
.function
.late_return_type
);
9653 if (type
== error_mark_node
)
9654 return error_mark_node
;
9656 if (declarator
->u
.function
.late_return_type
)
9657 late_return_type_p
= true;
9659 if (ctype
== NULL_TREE
9660 && decl_context
== FIELD
9663 ctype
= current_class_type
;
9665 if (ctype
&& (sfk
== sfk_constructor
9666 || sfk
== sfk_destructor
))
9668 /* We are within a class's scope. If our declarator name
9669 is the same as the class name, and we are defining
9670 a function, then it is a constructor/destructor, and
9671 therefore returns a void type. */
9673 /* ISO C++ 12.4/2. A destructor may not be declared
9674 const or volatile. A destructor may not be static.
9675 A destructor may not be declared with ref-qualifier.
9677 ISO C++ 12.1. A constructor may not be declared
9678 const or volatile. A constructor may not be
9679 virtual. A constructor may not be static.
9680 A constructor may not be declared with ref-qualifier. */
9682 error ((flags
== DTOR_FLAG
)
9683 ? G_("destructor cannot be static member function")
9684 : G_("constructor cannot be static member function"));
9687 error ((flags
== DTOR_FLAG
)
9688 ? G_("destructors may not be cv-qualified")
9689 : G_("constructors may not be cv-qualified"));
9690 memfn_quals
= TYPE_UNQUALIFIED
;
9695 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9696 error ((flags
== DTOR_FLAG
)
9697 ? "destructors may not be ref-qualified"
9698 : "constructors may not be ref-qualified");
9699 rqual
= REF_QUAL_NONE
;
9702 if (decl_context
== FIELD
9703 && !member_function_or_else (ctype
,
9706 return error_mark_node
;
9708 if (flags
!= DTOR_FLAG
)
9710 /* It's a constructor. */
9715 permerror (input_location
, "constructors cannot be declared virtual");
9718 if (decl_context
== FIELD
9719 && sfk
!= sfk_constructor
)
9720 return error_mark_node
;
9722 if (decl_context
== FIELD
)
9728 error ("can%'t initialize friend function %qs", name
);
9731 /* Cannot be both friend and virtual. */
9732 error ("virtual functions cannot be friends");
9735 if (decl_context
== NORMAL
)
9736 error ("friend declaration not in class definition");
9737 if (current_function_decl
&& funcdef_flag
)
9738 error ("can%'t define friend function %qs in a local "
9742 else if (ctype
&& sfk
== sfk_conversion
)
9746 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9751 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9754 if (inner_declarator
9755 && inner_declarator
->kind
== cdk_id
9756 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9757 && arg_types
!= void_list_node
)
9759 error ("destructors may not have parameters");
9760 arg_types
= void_list_node
;
9764 type
= build_function_type (type
, arg_types
);
9765 if (declarator
->std_attributes
)
9768 The optional attribute-specifier-seq appertains to
9769 the function type. */
9770 decl_attributes (&type
, declarator
->std_attributes
,
9778 /* Filter out pointers-to-references and references-to-references.
9779 We can get these if a TYPE_DECL is used. */
9781 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9783 if (declarator
->kind
!= cdk_reference
)
9785 error ("cannot declare pointer to %q#T", type
);
9786 type
= TREE_TYPE (type
);
9789 /* In C++0x, we allow reference to reference declarations
9790 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9791 and template type arguments [14.3.1/4 temp.arg.type]. The
9792 check for direct reference to reference declarations, which
9793 are still forbidden, occurs below. Reasoning behind the change
9794 can be found in DR106, DR540, and the rvalue reference
9796 else if (cxx_dialect
== cxx98
)
9798 error ("cannot declare reference to %q#T", type
);
9799 type
= TREE_TYPE (type
);
9802 else if (VOID_TYPE_P (type
))
9804 if (declarator
->kind
== cdk_reference
)
9805 error ("cannot declare reference to %q#T", type
);
9806 else if (declarator
->kind
== cdk_ptrmem
)
9807 error ("cannot declare pointer to %q#T member", type
);
9810 /* We now know that the TYPE_QUALS don't apply to the decl,
9811 but to the target of the pointer. */
9812 type_quals
= TYPE_UNQUALIFIED
;
9814 /* This code used to handle METHOD_TYPE, but I don't think it's
9815 possible to get it here anymore. */
9816 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9817 if (declarator
->kind
== cdk_ptrmem
9818 && TREE_CODE (type
) == FUNCTION_TYPE
)
9820 memfn_quals
|= type_memfn_quals (type
);
9821 type
= build_memfn_type (type
,
9822 declarator
->u
.pointer
.class_type
,
9825 if (type
== error_mark_node
)
9826 return error_mark_node
;
9828 rqual
= REF_QUAL_NONE
;
9829 memfn_quals
= TYPE_UNQUALIFIED
;
9832 if (TREE_CODE (type
) == FUNCTION_TYPE
9833 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9834 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9835 error (declarator
->kind
== cdk_reference
9836 ? G_("cannot declare reference to qualified function type %qT")
9837 : G_("cannot declare pointer to qualified function type %qT"),
9840 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
)
9841 && (flag_iso
|| warn_vla
> 0))
9842 pedwarn (input_location
, OPT_Wvla
,
9843 declarator
->kind
== cdk_reference
9844 ? G_("reference to array of runtime bound")
9845 : G_("pointer to array of runtime bound"));
9847 /* When the pointed-to type involves components of variable size,
9848 care must be taken to ensure that the size evaluation code is
9849 emitted early enough to dominate all the possible later uses
9850 and late enough for the variables on which it depends to have
9853 This is expected to happen automatically when the pointed-to
9854 type has a name/declaration of it's own, but special attention
9855 is required if the type is anonymous.
9857 We handle the NORMAL and FIELD contexts here by inserting a
9858 dummy statement that just evaluates the size at a safe point
9859 and ensures it is not deferred until e.g. within a deeper
9860 conditional context (c++/43555).
9862 We expect nothing to be needed here for PARM or TYPENAME.
9863 Evaluating the size at this point for TYPENAME would
9864 actually be incorrect, as we might be in the middle of an
9865 expression with side effects on the pointed-to type size
9866 "arguments" prior to the pointer declaration point and the
9867 size evaluation could end up prior to the side effects. */
9869 if (!TYPE_NAME (type
)
9870 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9871 && at_function_scope_p ()
9872 && variably_modified_type_p (type
, NULL_TREE
))
9873 /* Force evaluation of the SAVE_EXPR. */
9874 finish_expr_stmt (TYPE_SIZE (type
));
9876 if (declarator
->kind
== cdk_reference
)
9878 /* In C++0x, the type we are creating a reference to might be
9879 a typedef which is itself a reference type. In that case,
9880 we follow the reference collapsing rules in
9881 [7.1.3/8 dcl.typedef] to create the final reference type:
9883 "If a typedef TD names a type that is a reference to a type
9884 T, an attempt to create the type 'lvalue reference to cv TD'
9885 creates the type 'lvalue reference to T,' while an attempt
9886 to create the type "rvalue reference to cv TD' creates the
9889 if (VOID_TYPE_P (type
))
9890 /* We already gave an error. */;
9891 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9893 if (declarator
->u
.reference
.rvalue_ref
)
9894 /* Leave type alone. */;
9896 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9899 type
= cp_build_reference_type
9900 (type
, declarator
->u
.reference
.rvalue_ref
);
9902 /* In C++0x, we need this check for direct reference to
9903 reference declarations, which are forbidden by
9904 [8.3.2/5 dcl.ref]. Reference to reference declarations
9905 are only allowed indirectly through typedefs and template
9906 type arguments. Example:
9908 void foo(int & &); // invalid ref-to-ref decl
9910 typedef int & int_ref;
9911 void foo(int_ref &); // valid ref-to-ref decl
9913 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9914 error ("cannot declare reference to %q#T, which is not "
9915 "a typedef or a template type argument", type
);
9917 else if (TREE_CODE (type
) == METHOD_TYPE
)
9918 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9919 else if (declarator
->kind
== cdk_ptrmem
)
9921 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9923 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9924 /* We will already have complained. */
9925 type
= error_mark_node
;
9927 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9931 type
= build_pointer_type (type
);
9933 /* Process a list of type modifier keywords (such as
9934 const or volatile) that were given inside the `*' or `&'. */
9936 if (declarator
->u
.pointer
.qualifiers
)
9939 = cp_build_qualified_type (type
,
9940 declarator
->u
.pointer
.qualifiers
);
9941 type_quals
= cp_type_quals (type
);
9944 /* Apply C++11 attributes to the pointer, and not to the
9945 type pointed to. This is unlike what is done for GNU
9946 attributes above. It is to comply with [dcl.ptr]/1:
9948 [the optional attribute-specifier-seq (7.6.1) appertains
9949 to the pointer and not to the object pointed to]. */
9950 if (declarator
->std_attributes
)
9951 decl_attributes (&type
, declarator
->std_attributes
,
9965 /* A `constexpr' specifier used in an object declaration declares
9966 the object as `const'. */
9967 if (constexpr_p
&& innermost_code
!= cdk_function
)
9969 if (type_quals
& TYPE_QUAL_VOLATILE
)
9970 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9971 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9973 type_quals
|= TYPE_QUAL_CONST
;
9974 type
= cp_build_qualified_type (type
, type_quals
);
9978 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9979 && TREE_CODE (type
) != FUNCTION_TYPE
9980 && TREE_CODE (type
) != METHOD_TYPE
)
9982 error ("template-id %qD used as a declarator",
9984 unqualified_id
= dname
;
9987 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9988 qualified with a class-name, turn it into a METHOD_TYPE, unless
9989 we know that the function is static. We take advantage of this
9990 opportunity to do other processing that pertains to entities
9991 explicitly declared to be class members. Note that if DECLARATOR
9992 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9993 would not have exited the loop above. */
9995 && declarator
->u
.id
.qualifying_scope
9996 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9998 ctype
= declarator
->u
.id
.qualifying_scope
;
9999 ctype
= TYPE_MAIN_VARIANT (ctype
);
10000 template_count
= num_template_headers_for_class (ctype
);
10002 if (ctype
== current_class_type
)
10006 permerror (input_location
, "member functions are implicitly friends of their class");
10010 permerror (declarator
->id_loc
,
10011 "extra qualification %<%T::%> on member %qs",
10014 else if (/* If the qualifying type is already complete, then we
10015 can skip the following checks. */
10016 !COMPLETE_TYPE_P (ctype
)
10017 && (/* If the function is being defined, then
10018 qualifying type must certainly be complete. */
10020 /* A friend declaration of "T::f" is OK, even if
10021 "T" is a template parameter. But, if this
10022 function is not a friend, the qualifying type
10023 must be a class. */
10024 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10025 /* For a declaration, the type need not be
10026 complete, if either it is dependent (since there
10027 is no meaningful definition of complete in that
10028 case) or the qualifying class is currently being
10030 || !(dependent_type_p (ctype
)
10031 || currently_open_class (ctype
)))
10032 /* Check that the qualifying type is complete. */
10033 && !complete_type_or_else (ctype
, NULL_TREE
))
10034 return error_mark_node
;
10035 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10037 if (current_class_type
10038 && (!friendp
|| funcdef_flag
))
10040 error (funcdef_flag
10041 ? G_("cannot define member function %<%T::%s%> "
10043 : G_("cannot declare member function %<%T::%s%> "
10045 ctype
, name
, current_class_type
);
10046 return error_mark_node
;
10049 else if (typedef_p
&& current_class_type
)
10051 error ("cannot declare member %<%T::%s%> within %qT",
10052 ctype
, name
, current_class_type
);
10053 return error_mark_node
;
10057 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10058 ctype
= current_class_type
;
10060 /* Now TYPE has the actual type. */
10062 if (returned_attrs
)
10065 *attrlist
= chainon (returned_attrs
, *attrlist
);
10067 attrlist
= &returned_attrs
;
10071 && declarator
->kind
== cdk_id
10072 && declarator
->std_attributes
)
10073 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10074 a declarator-id appertains to the entity that is declared. */
10075 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10077 /* Handle parameter packs. */
10078 if (parameter_pack_p
)
10080 if (decl_context
== PARM
)
10081 /* Turn the type into a pack expansion.*/
10082 type
= make_pack_expansion (type
);
10084 error ("non-parameter %qs cannot be a parameter pack", name
);
10087 /* Did array size calculations overflow or does the array cover more
10088 than half of the address-space? */
10089 if (TREE_CODE (type
) == ARRAY_TYPE
10090 && COMPLETE_TYPE_P (type
)
10091 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10092 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10094 error ("size of array %qs is too large", name
);
10095 /* If we proceed with the array type as it is, we'll eventually
10096 crash in tree_to_[su]hwi(). */
10097 type
= error_mark_node
;
10100 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10101 && !processing_template_decl
10102 && variably_modified_type_p (type
, NULL_TREE
))
10104 if (decl_context
== FIELD
)
10105 error ("data member may not have variably modified type %qT", type
);
10107 error ("parameter may not have variably modified type %qT", type
);
10108 type
= error_mark_node
;
10111 if (explicitp
== 1 || (explicitp
&& friendp
))
10113 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10114 in the declaration of a constructor or conversion function within
10115 a class definition. */
10116 if (!current_class_type
)
10117 error ("%<explicit%> outside class declaration");
10119 error ("%<explicit%> in friend declaration");
10121 error ("only declarations of constructors and conversion operators "
10122 "can be %<explicit%>");
10126 if (storage_class
== sc_mutable
)
10128 if (decl_context
!= FIELD
|| friendp
)
10130 error ("non-member %qs cannot be declared %<mutable%>", name
);
10131 storage_class
= sc_none
;
10133 else if (decl_context
== TYPENAME
|| typedef_p
)
10135 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10136 storage_class
= sc_none
;
10138 else if (TREE_CODE (type
) == FUNCTION_TYPE
10139 || TREE_CODE (type
) == METHOD_TYPE
)
10141 error ("function %qs cannot be declared %<mutable%>", name
);
10142 storage_class
= sc_none
;
10146 error ("static %qs cannot be declared %<mutable%>", name
);
10147 storage_class
= sc_none
;
10149 else if (type_quals
& TYPE_QUAL_CONST
)
10151 error ("const %qs cannot be declared %<mutable%>", name
);
10152 storage_class
= sc_none
;
10154 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10156 permerror (input_location
, "reference %qs cannot be declared "
10157 "%<mutable%>", name
);
10158 storage_class
= sc_none
;
10162 /* If this is declaring a typedef name, return a TYPE_DECL. */
10163 if (typedef_p
&& decl_context
!= TYPENAME
)
10167 /* Note that the grammar rejects storage classes
10168 in typenames, fields or parameters. */
10169 if (current_lang_name
== lang_name_java
)
10170 TYPE_FOR_JAVA (type
) = 1;
10172 /* This declaration:
10174 typedef void f(int) const;
10176 declares a function type which is not a member of any
10177 particular class, but which is cv-qualified; for
10178 example "f S::*" declares a pointer to a const-qualified
10179 member function of S. We record the cv-qualification in the
10181 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10183 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10185 /* We have now dealt with these qualifiers. */
10186 memfn_quals
= TYPE_UNQUALIFIED
;
10187 rqual
= REF_QUAL_NONE
;
10190 if (type_uses_auto (type
))
10192 error ("typedef declared %<auto%>");
10193 type
= error_mark_node
;
10196 if (cxx_dialect
>= cxx1y
&& array_of_runtime_bound_p (type
)
10197 && (flag_iso
|| warn_vla
> 0))
10198 pedwarn (input_location
, OPT_Wvla
,
10199 "typedef naming array of runtime bound");
10201 if (decl_context
== FIELD
)
10202 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10204 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10205 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10206 error_at (DECL_SOURCE_LOCATION (decl
),
10207 "typedef name may not be a nested-name-specifier");
10208 TREE_TYPE (decl
) = error_mark_node
;
10211 if (decl_context
!= FIELD
)
10213 if (!current_function_decl
)
10214 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10215 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10216 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10217 (current_function_decl
)))
10218 /* The TYPE_DECL is "abstract" because there will be
10219 clones of this constructor/destructor, and there will
10220 be copies of this TYPE_DECL generated in those
10221 clones. The decloning optimization (for space) may
10222 revert this subsequently if it determines that
10223 the clones should share a common implementation. */
10224 DECL_ABSTRACT (decl
) = 1;
10226 else if (current_class_type
10227 && constructor_name_p (unqualified_id
, current_class_type
))
10228 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10229 "as enclosing class",
10232 /* If the user declares "typedef struct {...} foo" then the
10233 struct will have an anonymous name. Fill that name in now.
10234 Nothing can refer to it, so nothing needs know about the name
10236 if (type
!= error_mark_node
10238 && TYPE_NAME (type
)
10239 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10240 && TYPE_ANONYMOUS_P (type
)
10241 && declspecs
->type_definition_p
10242 && attributes_naming_typedef_ok (*attrlist
)
10243 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10247 /* Replace the anonymous name with the real name everywhere. */
10248 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10250 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
10251 /* We do not rename the debug info representing the
10252 anonymous tagged type because the standard says in
10253 [dcl.typedef] that the naming applies only for
10254 linkage purposes. */
10255 /*debug_hooks->set_name (t, decl);*/
10256 TYPE_NAME (t
) = decl
;
10259 if (TYPE_LANG_SPECIFIC (type
))
10260 TYPE_WAS_ANONYMOUS (type
) = 1;
10262 /* If this is a typedef within a template class, the nested
10263 type is a (non-primary) template. The name for the
10264 template needs updating as well. */
10265 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10266 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10267 = TYPE_IDENTIFIER (type
);
10269 /* Adjust linkage now that we aren't anonymous anymore. */
10270 reset_type_linkage (type
);
10272 /* FIXME remangle member functions; member functions of a
10273 type with external linkage have external linkage. */
10277 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10278 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10280 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10281 memfn_quals
!= TYPE_UNQUALIFIED
,
10282 inlinep
, friendp
, raises
!= NULL_TREE
);
10284 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10285 /* Acknowledge that this was written:
10286 `using analias = atype;'. */
10287 TYPE_DECL_ALIAS_P (decl
) = 1;
10292 /* Detect the case of an array type of unspecified size
10293 which came, as such, direct from a typedef name.
10294 We must copy the type, so that the array's domain can be
10295 individually set by the object's initializer. */
10297 if (type
&& typedef_type
10298 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10299 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10300 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10302 /* Detect where we're using a typedef of function type to declare a
10303 function. PARMS will not be set, so we must create it now. */
10305 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10307 tree decls
= NULL_TREE
;
10310 for (args
= TYPE_ARG_TYPES (type
);
10311 args
&& args
!= void_list_node
;
10312 args
= TREE_CHAIN (args
))
10314 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10316 DECL_CHAIN (decl
) = decls
;
10320 parms
= nreverse (decls
);
10322 if (decl_context
!= TYPENAME
)
10324 /* The qualifiers on the function type become the qualifiers on
10325 the non-static member function. */
10326 memfn_quals
|= type_memfn_quals (type
);
10327 rqual
= type_memfn_rqual (type
);
10328 type_quals
= TYPE_UNQUALIFIED
;
10332 /* If this is a type name (such as, in a cast or sizeof),
10333 compute the type and return it now. */
10335 if (decl_context
== TYPENAME
)
10337 /* Note that the grammar rejects storage classes
10338 in typenames, fields or parameters. */
10339 if (type_quals
!= TYPE_UNQUALIFIED
)
10340 type_quals
= TYPE_UNQUALIFIED
;
10342 /* Special case: "friend class foo" looks like a TYPENAME context. */
10345 if (type_quals
!= TYPE_UNQUALIFIED
)
10347 error ("type qualifiers specified for friend class declaration");
10348 type_quals
= TYPE_UNQUALIFIED
;
10352 error ("%<inline%> specified for friend class declaration");
10358 /* Don't allow friend declaration without a class-key. */
10359 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10360 permerror (input_location
, "template parameters cannot be friends");
10361 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10362 permerror (input_location
, "friend declaration requires class-key, "
10363 "i.e. %<friend class %T::%D%>",
10364 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10366 permerror (input_location
, "friend declaration requires class-key, "
10367 "i.e. %<friend %#T%>",
10371 /* Only try to do this stuff if we didn't already give up. */
10372 if (type
!= integer_type_node
)
10374 /* A friendly class? */
10375 if (current_class_type
)
10376 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10377 /*complain=*/true);
10379 error ("trying to make class %qT a friend of global scope",
10382 type
= void_type_node
;
10385 else if (memfn_quals
|| rqual
)
10387 if (ctype
== NULL_TREE
10388 && TREE_CODE (type
) == METHOD_TYPE
)
10389 ctype
= TYPE_METHOD_BASETYPE (type
);
10392 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10393 /* Core issue #547: need to allow this in template type args.
10394 Allow it in general in C++11 for alias-declarations. */
10395 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10396 && TREE_CODE (type
) == FUNCTION_TYPE
)
10397 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10399 error ("invalid qualifiers on non-member function type");
10404 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10405 && decl_context
!= CATCHPARM
10406 && TREE_CODE (type
) != UNION_TYPE
10409 error ("abstract declarator %qT used as declaration", type
);
10410 return error_mark_node
;
10413 /* Only functions may be declared using an operator-function-id. */
10415 && IDENTIFIER_OPNAME_P (unqualified_id
)
10416 && TREE_CODE (type
) != FUNCTION_TYPE
10417 && TREE_CODE (type
) != METHOD_TYPE
)
10419 error ("declaration of %qD as non-function", unqualified_id
);
10420 return error_mark_node
;
10423 /* We don't check parameter types here because we can emit a better
10424 error message later. */
10425 if (decl_context
!= PARM
)
10427 type
= check_var_type (unqualified_id
, type
);
10428 if (type
== error_mark_node
)
10429 return error_mark_node
;
10432 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10433 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10435 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10437 if (ctype
|| in_namespace
)
10438 error ("cannot use %<::%> in parameter declaration");
10440 if (type_uses_auto (type
))
10442 if (cxx_dialect
>= cxx1y
)
10443 error ("%<auto%> parameter not permitted in this context");
10445 error ("parameter declared %<auto%>");
10446 type
= error_mark_node
;
10449 /* A parameter declared as an array of T is really a pointer to T.
10450 One declared as a function is really a pointer to a function.
10451 One declared as a member is really a pointer to member. */
10453 if (TREE_CODE (type
) == ARRAY_TYPE
)
10455 /* Transfer const-ness of array into that of type pointed to. */
10456 type
= build_pointer_type (TREE_TYPE (type
));
10457 type_quals
= TYPE_UNQUALIFIED
;
10458 array_parameter_p
= true;
10460 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10461 type
= build_pointer_type (type
);
10464 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10465 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10467 cp_cv_quals real_quals
= memfn_quals
;
10468 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10469 real_quals
|= TYPE_QUAL_CONST
;
10470 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10476 if (decl_context
== PARM
)
10478 decl
= cp_build_parm_decl (unqualified_id
, type
);
10479 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10481 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10482 memfn_quals
!= TYPE_UNQUALIFIED
,
10483 inlinep
, friendp
, raises
!= NULL_TREE
);
10485 else if (decl_context
== FIELD
)
10487 if (!staticp
&& TREE_CODE (type
) != METHOD_TYPE
10488 && type_uses_auto (type
))
10490 error ("non-static data member declared %<auto%>");
10491 type
= error_mark_node
;
10494 /* The C99 flexible array extension. */
10495 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10496 && TYPE_DOMAIN (type
) == NULL_TREE
)
10498 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10499 tf_warning_or_error
);
10500 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10503 if (type
== error_mark_node
)
10505 /* Happens when declaring arrays of sizes which
10506 are error_mark_node, for example. */
10509 else if (in_namespace
&& !friendp
)
10511 /* Something like struct S { int N::j; }; */
10512 error ("invalid use of %<::%>");
10513 return error_mark_node
;
10515 else if (TREE_CODE (type
) == FUNCTION_TYPE
10516 || TREE_CODE (type
) == METHOD_TYPE
)
10519 tree function_context
;
10523 /* This should never happen in pure C++ (the check
10524 could be an assert). It could happen in
10525 Objective-C++ if someone writes invalid code that
10526 uses a function declaration for an instance
10527 variable or property (instance variables and
10528 properties are parsed as FIELD_DECLs, but they are
10529 part of an Objective-C class, not a C++ class).
10530 That code is invalid and is caught by this
10534 error ("declaration of function %qD in invalid context",
10536 return error_mark_node
;
10539 /* ``A union may [ ... ] not [ have ] virtual functions.''
10541 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10543 error ("function %qD declared virtual inside a union",
10545 return error_mark_node
;
10548 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10552 error ("%qD cannot be declared virtual, since it "
10553 "is always static",
10560 /* Check that the name used for a destructor makes sense. */
10561 if (sfk
== sfk_destructor
)
10563 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10567 gcc_assert (friendp
);
10568 error ("expected qualified name in friend declaration "
10569 "for destructor %qD", uqname
);
10570 return error_mark_node
;
10573 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10575 error ("declaration of %qD as member of %qT",
10577 return error_mark_node
;
10581 error ("a destructor cannot be %<constexpr%>");
10582 return error_mark_node
;
10585 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10587 error ("expected qualified name in friend declaration "
10588 "for constructor %qD",
10589 id_declarator
->u
.id
.unqualified_name
);
10590 return error_mark_node
;
10593 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10594 function_context
= (ctype
!= NULL_TREE
) ?
10595 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10596 publicp
= (! friendp
|| ! staticp
)
10597 && function_context
== NULL_TREE
;
10599 if (late_return_type_p
)
10600 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10602 decl
= grokfndecl (ctype
, type
,
10603 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10604 ? unqualified_id
: dname
,
10607 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10608 friendp
? -1 : 0, friendp
, publicp
,
10609 inlinep
| (2 * constexpr_p
),
10611 funcdef_flag
, template_count
, in_namespace
,
10612 attrlist
, declarator
->id_loc
);
10613 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10614 if (decl
== NULL_TREE
)
10615 return error_mark_node
;
10617 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10618 /* The decl and setting of decl_attr is also turned off. */
10619 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10622 /* [class.conv.ctor]
10624 A constructor declared without the function-specifier
10625 explicit that can be called with a single parameter
10626 specifies a conversion from the type of its first
10627 parameter to the type of its class. Such a constructor
10628 is called a converting constructor. */
10629 if (explicitp
== 2)
10630 DECL_NONCONVERTING_P (decl
) = 1;
10632 else if (!staticp
&& !dependent_type_p (type
)
10633 && !COMPLETE_TYPE_P (complete_type (type
))
10634 && (TREE_CODE (type
) != ARRAY_TYPE
10635 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10636 || initialized
== 0))
10638 if (unqualified_id
)
10640 error ("field %qD has incomplete type %qT",
10641 unqualified_id
, type
);
10642 cxx_incomplete_type_inform (strip_array_types (type
));
10645 error ("name %qT has incomplete type", type
);
10647 type
= error_mark_node
;
10654 error ("%qE is neither function nor member function; "
10655 "cannot be declared friend", unqualified_id
);
10663 /* Friends are treated specially. */
10664 if (ctype
== current_class_type
)
10665 ; /* We already issued a permerror. */
10666 else if (decl
&& DECL_NAME (decl
))
10668 if (template_class_depth (current_class_type
) == 0)
10670 decl
= check_explicit_specialization
10671 (unqualified_id
, decl
, template_count
,
10672 2 * funcdef_flag
+ 4);
10673 if (decl
== error_mark_node
)
10674 return error_mark_node
;
10677 decl
= do_friend (ctype
, unqualified_id
, decl
,
10683 return error_mark_node
;
10686 /* Structure field. It may not be a function, except for C++. */
10688 if (decl
== NULL_TREE
)
10692 /* C++ allows static class members. All other work
10693 for this is done by grokfield. */
10694 decl
= build_lang_decl_loc (declarator
10695 ? declarator
->id_loc
10697 VAR_DECL
, unqualified_id
, type
);
10698 set_linkage_for_static_data_member (decl
);
10699 /* Even if there is an in-class initialization, DECL
10700 is considered undefined until an out-of-class
10701 definition is provided. */
10702 DECL_EXTERNAL (decl
) = 1;
10706 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10707 if (declspecs
->gnu_thread_keyword_p
)
10708 DECL_GNU_TLS_P (decl
) = true;
10711 if (constexpr_p
&& !initialized
)
10713 error ("constexpr static data member %qD must have an "
10714 "initializer", decl
);
10715 constexpr_p
= false;
10722 error ("non-static data member %qE declared %<constexpr%>",
10724 constexpr_p
= false;
10726 decl
= build_decl (input_location
,
10727 FIELD_DECL
, unqualified_id
, type
);
10728 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10729 if (bitfield
&& !unqualified_id
)
10730 TREE_NO_WARNING (decl
) = 1;
10732 if (storage_class
== sc_mutable
)
10734 DECL_MUTABLE_P (decl
) = 1;
10735 storage_class
= sc_none
;
10740 /* An attempt is being made to initialize a non-static
10741 member. This is new in C++11. */
10742 maybe_warn_cpp0x (CPP0X_NSDMI
);
10744 /* If this has been parsed with static storage class, but
10745 errors forced staticp to be cleared, ensure NSDMI is
10747 if (declspecs
->storage_class
== sc_static
)
10748 DECL_INITIAL (decl
) = error_mark_node
;
10752 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10753 memfn_quals
!= TYPE_UNQUALIFIED
,
10754 inlinep
, friendp
, raises
!= NULL_TREE
);
10757 else if (TREE_CODE (type
) == FUNCTION_TYPE
10758 || TREE_CODE (type
) == METHOD_TYPE
)
10760 tree original_name
;
10763 if (!unqualified_id
)
10764 return error_mark_node
;
10766 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10767 original_name
= dname
;
10769 original_name
= unqualified_id
;
10771 if (storage_class
== sc_auto
)
10772 error ("storage class %<auto%> invalid for function %qs", name
);
10773 else if (storage_class
== sc_register
)
10774 error ("storage class %<register%> invalid for function %qs", name
);
10777 if (declspecs
->gnu_thread_keyword_p
)
10778 error ("storage class %<__thread%> invalid for function %qs",
10781 error ("storage class %<thread_local%> invalid for function %qs",
10785 if (virt_specifiers
)
10786 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10787 /* Function declaration not at top level.
10788 Storage classes other than `extern' are not allowed
10789 and `extern' makes no difference. */
10790 if (! toplevel_bindings_p ()
10791 && (storage_class
== sc_static
10792 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10795 if (storage_class
== sc_static
)
10796 pedwarn (input_location
, OPT_Wpedantic
,
10797 "%<static%> specified invalid for function %qs "
10798 "declared out of global scope", name
);
10800 pedwarn (input_location
, OPT_Wpedantic
,
10801 "%<inline%> specifier invalid for function %qs "
10802 "declared out of global scope", name
);
10805 if (ctype
== NULL_TREE
)
10809 error ("virtual non-class function %qs", name
);
10812 else if (sfk
== sfk_constructor
10813 || sfk
== sfk_destructor
)
10815 error (funcdef_flag
10816 ? G_("%qs defined in a non-class scope")
10817 : G_("%qs declared in a non-class scope"), name
);
10822 /* Record whether the function is public. */
10823 publicp
= (ctype
!= NULL_TREE
10824 || storage_class
!= sc_static
);
10826 if (late_return_type_p
)
10827 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10829 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10830 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10832 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10834 template_count
, in_namespace
, attrlist
,
10835 declarator
->id_loc
);
10836 if (decl
== NULL_TREE
)
10837 return error_mark_node
;
10841 int invalid_static
= 0;
10843 /* Don't allow a static member function in a class, and forbid
10844 declaring main to be static. */
10845 if (TREE_CODE (type
) == METHOD_TYPE
)
10847 permerror (input_location
, "cannot declare member function %qD to have "
10848 "static linkage", decl
);
10849 invalid_static
= 1;
10851 else if (current_function_decl
)
10853 /* FIXME need arm citation */
10854 error ("cannot declare static function inside another function");
10855 invalid_static
= 1;
10858 if (invalid_static
)
10861 storage_class
= sc_none
;
10867 /* It's a variable. */
10869 /* An uninitialized decl with `extern' is a reference. */
10870 decl
= grokvardecl (type
, unqualified_id
,
10873 (type_quals
& TYPE_QUAL_CONST
) != 0,
10874 ctype
? ctype
: in_namespace
);
10875 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10876 memfn_quals
!= TYPE_UNQUALIFIED
,
10877 inlinep
, friendp
, raises
!= NULL_TREE
);
10881 DECL_CONTEXT (decl
) = ctype
;
10884 permerror (input_location
, "%<static%> may not be used when defining "
10885 "(as opposed to declaring) a static data member");
10887 storage_class
= sc_none
;
10889 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10891 error ("static member %qD declared %<register%>", decl
);
10892 storage_class
= sc_none
;
10894 if (storage_class
== sc_extern
&& pedantic
)
10896 pedwarn (input_location
, OPT_Wpedantic
,
10897 "cannot explicitly declare member %q#D to have "
10898 "extern linkage", decl
);
10899 storage_class
= sc_none
;
10902 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10904 error ("declaration of constexpr variable %qD is not a definition",
10906 constexpr_p
= false;
10910 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10912 if (toplevel_bindings_p ())
10914 /* It's common practice (and completely valid) to have a const
10915 be initialized and declared extern. */
10916 if (!(type_quals
& TYPE_QUAL_CONST
))
10917 warning (0, "%qs initialized and declared %<extern%>", name
);
10921 error ("%qs has both %<extern%> and initializer", name
);
10922 return error_mark_node
;
10926 /* Record `register' declaration for warnings on &
10927 and in case doing stupid register allocation. */
10929 if (storage_class
== sc_register
)
10930 DECL_REGISTER (decl
) = 1;
10931 else if (storage_class
== sc_extern
)
10932 DECL_THIS_EXTERN (decl
) = 1;
10933 else if (storage_class
== sc_static
)
10934 DECL_THIS_STATIC (decl
) = 1;
10936 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10937 if (constexpr_p
&& VAR_P (decl
))
10938 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10940 /* Record constancy and volatility on the DECL itself . There's
10941 no need to do this when processing a template; we'll do this
10942 for the instantiated declaration based on the type of DECL. */
10943 if (!processing_template_decl
)
10944 cp_apply_type_quals_to_decl (type_quals
, decl
);
10950 /* Subroutine of start_function. Ensure that each of the parameter
10951 types (as listed in PARMS) is complete, as is required for a
10952 function definition. */
10955 require_complete_types_for_parms (tree parms
)
10957 for (; parms
; parms
= DECL_CHAIN (parms
))
10959 if (dependent_type_p (TREE_TYPE (parms
)))
10961 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10962 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10964 relayout_decl (parms
);
10965 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10968 /* grokparms or complete_type_or_else will have already issued
10970 TREE_TYPE (parms
) = error_mark_node
;
10974 /* Returns nonzero if T is a local variable. */
10977 local_variable_p (const_tree t
)
10980 /* A VAR_DECL with a context that is a _TYPE is a static data
10982 && !TYPE_P (CP_DECL_CONTEXT (t
))
10983 /* Any other non-local variable must be at namespace scope. */
10984 && !DECL_NAMESPACE_SCOPE_P (t
))
10985 || (TREE_CODE (t
) == PARM_DECL
))
10991 /* Like local_variable_p, but suitable for use as a tree-walking
10995 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10998 if (local_variable_p (*tp
)
10999 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11001 else if (TYPE_P (*tp
))
11002 *walk_subtrees
= 0;
11007 /* Check that ARG, which is a default-argument expression for a
11008 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11009 something goes wrong. DECL may also be a _TYPE node, rather than a
11010 DECL, if there is no DECL available. */
11013 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11018 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11019 /* We get a DEFAULT_ARG when looking at an in-class declaration
11020 with a default argument. Ignore the argument for now; we'll
11021 deal with it after the class is complete. */
11030 decl_type
= TREE_TYPE (decl
);
11032 if (arg
== error_mark_node
11033 || decl
== error_mark_node
11034 || TREE_TYPE (arg
) == error_mark_node
11035 || decl_type
== error_mark_node
)
11036 /* Something already went wrong. There's no need to check
11038 return error_mark_node
;
11040 /* [dcl.fct.default]
11042 A default argument expression is implicitly converted to the
11044 ++cp_unevaluated_operand
;
11045 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11047 --cp_unevaluated_operand
;
11049 if (warn_zero_as_null_pointer_constant
11050 && TYPE_PTR_OR_PTRMEM_P (decl_type
)
11051 && null_ptr_cst_p (arg
)
11052 && (complain
& tf_warning
)
11053 && maybe_warn_zero_as_null_pointer_constant (arg
, input_location
))
11054 return nullptr_node
;
11056 /* [dcl.fct.default]
11058 Local variables shall not be used in default argument
11061 The keyword `this' shall not be used in a default argument of a
11062 member function. */
11063 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11066 if (complain
& tf_warning_or_error
)
11068 if (DECL_NAME (var
) == this_identifier
)
11069 permerror (input_location
, "default argument %qE uses %qD",
11072 error ("default argument %qE uses local variable %qD", arg
, var
);
11074 return error_mark_node
;
11081 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11084 type_is_deprecated (tree type
)
11086 enum tree_code code
;
11087 if (TREE_DEPRECATED (type
))
11089 if (TYPE_NAME (type
)
11090 && TREE_DEPRECATED (TYPE_NAME (type
)))
11093 /* Do warn about using typedefs to a deprecated class. */
11094 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11095 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11097 code
= TREE_CODE (type
);
11099 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11100 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11101 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11102 return type_is_deprecated (TREE_TYPE (type
));
11104 if (TYPE_PTRMEMFUNC_P (type
))
11105 return type_is_deprecated
11106 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11111 /* Decode the list of parameter types for a function type.
11112 Given the list of things declared inside the parens,
11113 return a list of types.
11115 If this parameter does not end with an ellipsis, we append
11118 *PARMS is set to the chain of PARM_DECLs created. */
11121 grokparms (tree parmlist
, tree
*parms
)
11123 tree result
= NULL_TREE
;
11124 tree decls
= NULL_TREE
;
11128 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11130 tree type
= NULL_TREE
;
11131 tree init
= TREE_PURPOSE (parm
);
11132 tree decl
= TREE_VALUE (parm
);
11133 const char *errmsg
;
11135 if (parm
== void_list_node
)
11138 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11141 type
= TREE_TYPE (decl
);
11142 if (VOID_TYPE_P (type
))
11144 if (same_type_p (type
, void_type_node
)
11146 && !DECL_NAME (decl
) && !result
11147 && TREE_CHAIN (parm
) == void_list_node
)
11148 /* DR 577: A parameter list consisting of a single
11149 unnamed parameter of non-dependent type 'void'. */
11151 else if (cv_qualified_p (type
))
11152 error_at (DECL_SOURCE_LOCATION (decl
),
11153 "invalid use of cv-qualified type %qT in "
11154 "parameter declaration", type
);
11156 error_at (DECL_SOURCE_LOCATION (decl
),
11157 "invalid use of type %<void%> in parameter "
11159 /* It's not a good idea to actually create parameters of
11160 type `void'; other parts of the compiler assume that a
11161 void type terminates the parameter list. */
11162 type
= error_mark_node
;
11163 TREE_TYPE (decl
) = error_mark_node
;
11166 if (type
!= error_mark_node
11167 && TYPE_FOR_JAVA (type
)
11168 && MAYBE_CLASS_TYPE_P (type
))
11170 error ("parameter %qD has Java class type", decl
);
11171 type
= error_mark_node
;
11172 TREE_TYPE (decl
) = error_mark_node
;
11176 if (type
!= error_mark_node
11177 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11180 type
= error_mark_node
;
11181 TREE_TYPE (decl
) = error_mark_node
;
11184 if (type
!= error_mark_node
)
11186 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11188 tree deptype
= type_is_deprecated (type
);
11190 warn_deprecated_use (deptype
, NULL_TREE
);
11193 /* Top-level qualifiers on the parameters are
11194 ignored for function types. */
11195 type
= cp_build_qualified_type (type
, 0);
11196 if (TREE_CODE (type
) == METHOD_TYPE
)
11198 error ("parameter %qD invalidly declared method type", decl
);
11199 type
= build_pointer_type (type
);
11200 TREE_TYPE (decl
) = type
;
11202 else if (abstract_virtuals_error (decl
, type
))
11203 any_error
= 1; /* Seems like a good idea. */
11204 else if (POINTER_TYPE_P (type
))
11206 /* [dcl.fct]/6, parameter types cannot contain pointers
11207 (references) to arrays of unknown bound. */
11208 tree t
= TREE_TYPE (type
);
11209 int ptr
= TYPE_PTR_P (type
);
11213 if (TYPE_PTR_P (t
))
11215 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11217 else if (!TYPE_DOMAIN (t
))
11221 if (TREE_CODE (t
) == ARRAY_TYPE
)
11223 ? G_("parameter %qD includes pointer to array of "
11224 "unknown bound %qT")
11225 : G_("parameter %qD includes reference to array of "
11226 "unknown bound %qT"),
11232 else if (init
&& !processing_template_decl
)
11233 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11236 DECL_CHAIN (decl
) = decls
;
11238 result
= tree_cons (init
, type
, result
);
11240 decls
= nreverse (decls
);
11241 result
= nreverse (result
);
11243 result
= chainon (result
, void_list_node
);
11250 /* D is a constructor or overloaded `operator='.
11252 Let T be the class in which D is declared. Then, this function
11255 -1 if D's is an ill-formed constructor or copy assignment operator
11256 whose first parameter is of type `T'.
11257 0 if D is not a copy constructor or copy assignment
11259 1 if D is a copy constructor or copy assignment operator whose
11260 first parameter is a reference to non-const qualified T.
11261 2 if D is a copy constructor or copy assignment operator whose
11262 first parameter is a reference to const qualified T.
11264 This function can be used as a predicate. Positive values indicate
11265 a copy constructor and nonzero values indicate a copy assignment
11269 copy_fn_p (const_tree d
)
11275 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11277 if (TREE_CODE (d
) == TEMPLATE_DECL
11278 || (DECL_TEMPLATE_INFO (d
)
11279 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11280 /* Instantiations of template member functions are never copy
11281 functions. Note that member functions of templated classes are
11282 represented as template functions internally, and we must
11283 accept those as copy functions. */
11286 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11290 arg_type
= TREE_VALUE (args
);
11291 if (arg_type
== error_mark_node
)
11294 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11296 /* Pass by value copy assignment operator. */
11299 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11300 && !TYPE_REF_IS_RVALUE (arg_type
)
11301 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11303 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11309 args
= TREE_CHAIN (args
);
11311 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11312 /* There are more non-optional args. */
11318 /* D is a constructor or overloaded `operator='.
11320 Let T be the class in which D is declared. Then, this function
11321 returns true when D is a move constructor or move assignment
11322 operator, false otherwise. */
11325 move_fn_p (const_tree d
)
11327 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11329 if (cxx_dialect
== cxx98
)
11330 /* There are no move constructors if we are in C++98 mode. */
11333 if (TREE_CODE (d
) == TEMPLATE_DECL
11334 || (DECL_TEMPLATE_INFO (d
)
11335 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11336 /* Instantiations of template member functions are never move
11337 functions. Note that member functions of templated classes are
11338 represented as template functions internally, and we must
11339 accept those as move functions. */
11342 return move_signature_fn_p (d
);
11345 /* D is a constructor or overloaded `operator='.
11347 Then, this function returns true when D has the same signature as a move
11348 constructor or move assignment operator (because either it is such a
11349 ctor/op= or it is a template specialization with the same signature),
11350 false otherwise. */
11353 move_signature_fn_p (const_tree d
)
11357 bool result
= false;
11359 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11363 arg_type
= TREE_VALUE (args
);
11364 if (arg_type
== error_mark_node
)
11367 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11368 && TYPE_REF_IS_RVALUE (arg_type
)
11369 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11373 args
= TREE_CHAIN (args
);
11375 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11376 /* There are more non-optional args. */
11382 /* Remember any special properties of member function DECL. */
11385 grok_special_member_properties (tree decl
)
11389 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11392 class_type
= DECL_CONTEXT (decl
);
11393 if (DECL_CONSTRUCTOR_P (decl
))
11395 int ctor
= copy_fn_p (decl
);
11397 if (!DECL_ARTIFICIAL (decl
))
11398 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11404 A non-template constructor for class X is a copy
11405 constructor if its first parameter is of type X&, const
11406 X&, volatile X& or const volatile X&, and either there
11407 are no other parameters or else all other parameters have
11408 default arguments. */
11409 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11410 if (user_provided_p (decl
))
11411 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11413 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11415 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11417 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11418 if (user_provided_p (decl
))
11419 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
11421 else if (move_fn_p (decl
) && user_provided_p (decl
))
11422 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11423 else if (is_list_ctor (decl
))
11424 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11426 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11427 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11428 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11430 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11434 A non-template assignment operator for class X is a copy
11435 assignment operator if its parameter is of type X, X&, const
11436 X&, volatile X& or const volatile X&. */
11438 int assop
= copy_fn_p (decl
);
11442 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11443 if (user_provided_p (decl
))
11444 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11446 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11448 else if (move_fn_p (decl
) && user_provided_p (decl
))
11449 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11451 /* Destructors are handled in check_methods. */
11454 /* Check a constructor DECL has the correct form. Complains
11455 if the class has a constructor of the form X(X). */
11458 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11460 int ctor_parm
= copy_fn_p (decl
);
11466 A declaration of a constructor for a class X is ill-formed if
11467 its first parameter is of type (optionally cv-qualified) X
11468 and either there are no other parameters or else all other
11469 parameters have default arguments.
11471 We *don't* complain about member template instantiations that
11472 have this form, though; they can occur as we try to decide
11473 what constructor to use during overload resolution. Since
11474 overload resolution will never prefer such a constructor to
11475 the non-template copy constructor (which is either explicitly
11476 or implicitly defined), there's no need to worry about their
11477 existence. Theoretically, they should never even be
11478 instantiated, but that's hard to forestall. */
11479 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11487 /* An operator with this code is unary, but can also be binary. */
11490 ambi_op_p (enum tree_code code
)
11492 return (code
== INDIRECT_REF
11493 || code
== ADDR_EXPR
11494 || code
== UNARY_PLUS_EXPR
11495 || code
== NEGATE_EXPR
11496 || code
== PREINCREMENT_EXPR
11497 || code
== PREDECREMENT_EXPR
);
11500 /* An operator with this name can only be unary. */
11503 unary_op_p (enum tree_code code
)
11505 return (code
== TRUTH_NOT_EXPR
11506 || code
== BIT_NOT_EXPR
11507 || code
== COMPONENT_REF
11508 || code
== TYPE_EXPR
);
11511 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11512 errors are issued for invalid declarations. */
11515 grok_op_properties (tree decl
, bool complain
)
11517 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11519 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11520 tree name
= DECL_NAME (decl
);
11521 enum tree_code operator_code
;
11526 /* Count the number of arguments and check for ellipsis. */
11527 for (argtype
= argtypes
, arity
= 0;
11528 argtype
&& argtype
!= void_list_node
;
11529 argtype
= TREE_CHAIN (argtype
))
11531 ellipsis_p
= !argtype
;
11533 class_type
= DECL_CONTEXT (decl
);
11534 if (class_type
&& !CLASS_TYPE_P (class_type
))
11535 class_type
= NULL_TREE
;
11537 if (DECL_CONV_FN_P (decl
))
11538 operator_code
= TYPE_EXPR
;
11542 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11543 if (ansi_opname (CODE) == name) \
11545 operator_code = (CODE); \
11548 else if (ansi_assopname (CODE) == name) \
11550 operator_code = (CODE); \
11551 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11555 #include "operators.def"
11556 #undef DEF_OPERATOR
11558 gcc_unreachable ();
11561 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11562 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11565 switch (operator_code
)
11568 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11572 TYPE_GETS_DELETE (class_type
) |= 1;
11576 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11579 case VEC_DELETE_EXPR
:
11580 TYPE_GETS_DELETE (class_type
) |= 2;
11587 /* [basic.std.dynamic.allocation]/1:
11589 A program is ill-formed if an allocation function is declared
11590 in a namespace scope other than global scope or declared static
11593 The same also holds true for deallocation functions. */
11594 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11595 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11597 if (DECL_NAMESPACE_SCOPE_P (decl
))
11599 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11601 error ("%qD may not be declared within a namespace", decl
);
11604 else if (!TREE_PUBLIC (decl
))
11606 error ("%qD may not be declared as static", decl
);
11612 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11614 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11615 DECL_IS_OPERATOR_NEW (decl
) = 1;
11617 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11618 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11621 /* An operator function must either be a non-static member function
11622 or have at least one parameter of a class, a reference to a class,
11623 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11624 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11626 if (operator_code
== TYPE_EXPR
11627 || operator_code
== CALL_EXPR
11628 || operator_code
== COMPONENT_REF
11629 || operator_code
== ARRAY_REF
11630 || operator_code
== NOP_EXPR
)
11632 error ("%qD must be a nonstatic member function", decl
);
11639 if (DECL_STATIC_FUNCTION_P (decl
))
11641 error ("%qD must be either a non-static member "
11642 "function or a non-member function", decl
);
11646 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11648 tree arg
= non_reference (TREE_VALUE (p
));
11649 if (arg
== error_mark_node
)
11652 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11653 because these checks are performed even on
11654 template functions. */
11655 if (MAYBE_CLASS_TYPE_P (arg
)
11656 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11660 if (!p
|| p
== void_list_node
)
11663 error ("%qD must have an argument of class or "
11664 "enumerated type", decl
);
11670 /* There are no restrictions on the arguments to an overloaded
11672 if (operator_code
== CALL_EXPR
)
11675 /* Warn about conversion operators that will never be used. */
11676 if (IDENTIFIER_TYPENAME_P (name
)
11677 && ! DECL_TEMPLATE_INFO (decl
)
11679 /* Warn only declaring the function; there is no need to
11680 warn again about out-of-class definitions. */
11681 && class_type
== current_class_type
)
11683 tree t
= TREE_TYPE (name
);
11684 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11687 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11689 if (VOID_TYPE_P (t
))
11690 warning (OPT_Wconversion
,
11692 ? G_("conversion to a reference to void "
11693 "will never use a type conversion operator")
11694 : G_("conversion to void "
11695 "will never use a type conversion operator"));
11696 else if (class_type
)
11698 if (t
== class_type
)
11699 warning (OPT_Wconversion
,
11701 ? G_("conversion to a reference to the same type "
11702 "will never use a type conversion operator")
11703 : G_("conversion to the same type "
11704 "will never use a type conversion operator"));
11705 /* Don't force t to be complete here. */
11706 else if (MAYBE_CLASS_TYPE_P (t
)
11707 && COMPLETE_TYPE_P (t
)
11708 && DERIVED_FROM_P (t
, class_type
))
11709 warning (OPT_Wconversion
,
11711 ? G_("conversion to a reference to a base class "
11712 "will never use a type conversion operator")
11713 : G_("conversion to a base class "
11714 "will never use a type conversion operator"));
11719 if (operator_code
== COND_EXPR
)
11722 error ("ISO C++ prohibits overloading operator ?:");
11725 else if (ellipsis_p
)
11727 error ("%qD must not have variable number of arguments", decl
);
11730 else if (ambi_op_p (operator_code
))
11733 /* We pick the one-argument operator codes by default, so
11734 we don't have to change anything. */
11736 else if (arity
== 2)
11738 /* If we thought this was a unary operator, we now know
11739 it to be a binary operator. */
11740 switch (operator_code
)
11743 operator_code
= MULT_EXPR
;
11747 operator_code
= BIT_AND_EXPR
;
11750 case UNARY_PLUS_EXPR
:
11751 operator_code
= PLUS_EXPR
;
11755 operator_code
= MINUS_EXPR
;
11758 case PREINCREMENT_EXPR
:
11759 operator_code
= POSTINCREMENT_EXPR
;
11762 case PREDECREMENT_EXPR
:
11763 operator_code
= POSTDECREMENT_EXPR
;
11767 gcc_unreachable ();
11770 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11772 if ((operator_code
== POSTINCREMENT_EXPR
11773 || operator_code
== POSTDECREMENT_EXPR
)
11774 && ! processing_template_decl
11775 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11778 error ("postfix %qD must take %<int%> as its argument",
11781 error ("postfix %qD must take %<int%> as its second "
11789 error ("%qD must take either zero or one argument", decl
);
11791 error ("%qD must take either one or two arguments", decl
);
11795 /* More Effective C++ rule 6. */
11797 && (operator_code
== POSTINCREMENT_EXPR
11798 || operator_code
== POSTDECREMENT_EXPR
11799 || operator_code
== PREINCREMENT_EXPR
11800 || operator_code
== PREDECREMENT_EXPR
))
11802 tree arg
= TREE_VALUE (argtypes
);
11803 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11804 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11805 arg
= TREE_TYPE (arg
);
11806 arg
= TYPE_MAIN_VARIANT (arg
);
11807 if (operator_code
== PREINCREMENT_EXPR
11808 || operator_code
== PREDECREMENT_EXPR
)
11810 if (TREE_CODE (ret
) != REFERENCE_TYPE
11811 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11813 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11814 build_reference_type (arg
));
11818 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11819 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11823 else if (unary_op_p (operator_code
))
11828 error ("%qD must take %<void%>", decl
);
11830 error ("%qD must take exactly one argument", decl
);
11834 else /* if (binary_op_p (operator_code)) */
11839 error ("%qD must take exactly one argument", decl
);
11841 error ("%qD must take exactly two arguments", decl
);
11845 /* More Effective C++ rule 7. */
11847 && (operator_code
== TRUTH_ANDIF_EXPR
11848 || operator_code
== TRUTH_ORIF_EXPR
11849 || operator_code
== COMPOUND_EXPR
))
11850 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11854 /* Effective C++ rule 23. */
11857 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11858 && (operator_code
== PLUS_EXPR
11859 || operator_code
== MINUS_EXPR
11860 || operator_code
== TRUNC_DIV_EXPR
11861 || operator_code
== MULT_EXPR
11862 || operator_code
== TRUNC_MOD_EXPR
)
11863 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11864 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11866 /* [over.oper]/8 */
11867 for (; argtypes
&& argtypes
!= void_list_node
;
11868 argtypes
= TREE_CHAIN (argtypes
))
11869 if (TREE_PURPOSE (argtypes
))
11871 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11872 if (operator_code
== POSTINCREMENT_EXPR
11873 || operator_code
== POSTDECREMENT_EXPR
)
11875 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
11880 error ("%qD cannot have default arguments", decl
);
11888 /* Return a string giving the keyword associate with CODE. */
11890 static const char *
11891 tag_name (enum tag_types code
)
11903 case typename_type
:
11906 gcc_unreachable ();
11910 /* Name lookup in an elaborated-type-specifier (after the keyword
11911 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11912 elaborated-type-specifier is invalid, issue a diagnostic and return
11913 error_mark_node; otherwise, return the *_TYPE to which it referred.
11914 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11917 check_elaborated_type_specifier (enum tag_types tag_code
,
11919 bool allow_template_p
)
11925 struct S { struct S *p; };
11927 name lookup will find the TYPE_DECL for the implicit "S::S"
11928 typedef. Adjust for that here. */
11929 if (DECL_SELF_REFERENCE_P (decl
))
11930 decl
= TYPE_NAME (TREE_TYPE (decl
));
11932 type
= TREE_TYPE (decl
);
11934 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11935 is false for this case as well. */
11936 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11938 error ("using template type parameter %qT after %qs",
11939 type
, tag_name (tag_code
));
11940 return error_mark_node
;
11942 /* Accept template template parameters. */
11943 else if (allow_template_p
11944 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
11945 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
11949 If the identifier resolves to a typedef-name or the
11950 simple-template-id resolves to an alias template
11951 specialization, the elaborated-type-specifier is ill-formed.
11953 In other words, the only legitimate declaration to use in the
11954 elaborated type specifier is the implicit typedef created when
11955 the type is declared. */
11956 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11957 && !DECL_SELF_REFERENCE_P (decl
)
11958 && tag_code
!= typename_type
)
11960 if (alias_template_specialization_p (type
))
11961 error ("using alias template specialization %qT after %qs",
11962 type
, tag_name (tag_code
));
11964 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11965 inform (DECL_SOURCE_LOCATION (decl
),
11966 "%qD has a previous declaration here", decl
);
11967 return error_mark_node
;
11969 else if (TREE_CODE (type
) != RECORD_TYPE
11970 && TREE_CODE (type
) != UNION_TYPE
11971 && tag_code
!= enum_type
11972 && tag_code
!= typename_type
)
11974 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11975 inform (input_location
, "%q+T has a previous declaration here", type
);
11976 return error_mark_node
;
11978 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11979 && tag_code
== enum_type
)
11981 error ("%qT referred to as enum", type
);
11982 inform (input_location
, "%q+T has a previous declaration here", type
);
11983 return error_mark_node
;
11985 else if (!allow_template_p
11986 && TREE_CODE (type
) == RECORD_TYPE
11987 && CLASSTYPE_IS_TEMPLATE (type
))
11989 /* If a class template appears as elaborated type specifier
11990 without a template header such as:
11992 template <class T> class C {};
11993 void f(class C); // No template header here
11995 then the required template argument is missing. */
11996 error ("template argument required for %<%s %T%>",
11997 tag_name (tag_code
),
11998 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11999 return error_mark_node
;
12005 /* Lookup NAME in elaborate type specifier in scope according to
12006 SCOPE and issue diagnostics if necessary.
12007 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12008 found, and ERROR_MARK_NODE for type error. */
12011 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12012 tag_scope scope
, bool template_header_p
)
12016 if (scope
== ts_global
)
12018 /* First try ordinary name lookup, ignoring hidden class name
12019 injected via friend declaration. */
12020 decl
= lookup_name_prefer_type (name
, 2);
12021 /* If that fails, the name will be placed in the smallest
12022 non-class, non-function-prototype scope according to 3.3.1/5.
12023 We may already have a hidden name declared as friend in this
12024 scope. So lookup again but not ignoring hidden names.
12025 If we find one, that name will be made visible rather than
12026 creating a new tag. */
12028 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12031 decl
= lookup_type_scope (name
, scope
);
12034 && (DECL_CLASS_TEMPLATE_P (decl
)
12035 /* If scope is ts_current we're defining a class, so ignore a
12036 template template parameter. */
12037 || (scope
!= ts_current
12038 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12039 decl
= DECL_TEMPLATE_RESULT (decl
);
12041 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12043 /* Look for invalid nested type:
12047 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12049 error ("%qD has the same name as the class in which it is "
12052 return error_mark_node
;
12055 /* Two cases we need to consider when deciding if a class
12056 template is allowed as an elaborated type specifier:
12057 1. It is a self reference to its own class.
12058 2. It comes with a template header.
12062 template <class T> class C {
12063 class C *c1; // DECL_SELF_REFERENCE_P is true
12066 template <class U> class C; // template_header_p is true
12067 template <class T> class C<T>::D {
12068 class C *c2; // DECL_SELF_REFERENCE_P is true
12071 t
= check_elaborated_type_specifier (tag_code
,
12074 | DECL_SELF_REFERENCE_P (decl
));
12077 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12079 error ("reference to %qD is ambiguous", name
);
12080 print_candidates (decl
);
12081 return error_mark_node
;
12087 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12088 Define the tag as a forward-reference if it is not defined.
12090 If a declaration is given, process it here, and report an error if
12091 multiple declarations are not identical.
12093 SCOPE is TS_CURRENT when this is also a definition. Only look in
12094 the current frame for the name (since C++ allows new names in any
12095 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12096 declaration. Only look beginning from the current scope outward up
12097 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12099 TEMPLATE_HEADER_P is true when this declaration is preceded by
12100 a set of template parameters. */
12103 xref_tag_1 (enum tag_types tag_code
, tree name
,
12104 tag_scope orig_scope
, bool template_header_p
)
12106 enum tree_code code
;
12108 tree context
= NULL_TREE
;
12111 gcc_assert (identifier_p (name
));
12117 code
= RECORD_TYPE
;
12123 code
= ENUMERAL_TYPE
;
12126 gcc_unreachable ();
12129 if (orig_scope
== ts_lambda
)
12130 scope
= ts_current
;
12132 scope
= orig_scope
;
12134 /* In case of anonymous name, xref_tag is only called to
12135 make type node and push name. Name lookup is not required. */
12136 if (ANON_AGGRNAME_P (name
))
12139 t
= lookup_and_check_tag (tag_code
, name
,
12140 scope
, template_header_p
);
12142 if (t
== error_mark_node
)
12143 return error_mark_node
;
12145 if (scope
!= ts_current
&& t
&& current_class_type
12146 && template_class_depth (current_class_type
)
12147 && template_header_p
)
12149 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12152 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12153 definition of this tag. Since, in addition, we are currently
12154 processing a (member) template declaration of a template
12155 class, we must be very careful; consider:
12162 { template <class V>
12163 friend struct S1; };
12165 Here, the S2::S1 declaration should not be confused with the
12166 outer declaration. In particular, the inner version should
12167 have a template parameter of level 2, not level 1. This
12168 would be particularly important if the member declaration
12171 template <class V = U> friend struct S1;
12173 say, when we should tsubst into `U' when instantiating
12174 S2. On the other hand, when presented with:
12184 we must find the inner binding eventually. We
12185 accomplish this by making sure that the new type we
12186 create to represent this declaration has the right
12188 context
= TYPE_CONTEXT (t
);
12194 /* If no such tag is yet defined, create a forward-reference node
12195 and record it as the "definition".
12196 When a real declaration of this type is found,
12197 the forward-reference will be altered into a real type. */
12198 if (code
== ENUMERAL_TYPE
)
12200 error ("use of enum %q#D without previous declaration", name
);
12201 return error_mark_node
;
12205 t
= make_class_type (code
);
12206 TYPE_CONTEXT (t
) = context
;
12207 if (orig_scope
== ts_lambda
)
12208 /* Remember that we're declaring a lambda to avoid bogus errors
12209 in push_template_decl. */
12210 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12211 t
= pushtag (name
, t
, scope
);
12216 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12218 if (!redeclare_class_template (t
, current_template_parms
))
12219 return error_mark_node
;
12221 else if (!processing_template_decl
12222 && CLASS_TYPE_P (t
)
12223 && CLASSTYPE_IS_TEMPLATE (t
))
12225 error ("redeclaration of %qT as a non-template", t
);
12226 error ("previous declaration %q+D", t
);
12227 return error_mark_node
;
12230 /* Make injected friend class visible. */
12231 if (scope
!= ts_within_enclosing_non_class
12232 && hidden_name_p (TYPE_NAME (t
)))
12234 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12235 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12237 if (TYPE_TEMPLATE_INFO (t
))
12239 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12240 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12248 /* Wrapper for xref_tag_1. */
12251 xref_tag (enum tag_types tag_code
, tree name
,
12252 tag_scope scope
, bool template_header_p
)
12256 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12257 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12258 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12264 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12266 enum tag_types tag_kind
;
12268 if (TREE_CODE (old
) == RECORD_TYPE
)
12269 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12271 tag_kind
= union_type
;
12273 if (id
== NULL_TREE
)
12274 id
= TYPE_IDENTIFIER (old
);
12276 return xref_tag (tag_kind
, id
, scope
, false);
12279 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12280 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12281 access_* node, and the TREE_VALUE is the type of the base-class.
12282 Non-NULL TREE_TYPE indicates virtual inheritance.
12284 Returns true if the binfo hierarchy was successfully created,
12285 false if an error was detected. */
12288 xref_basetypes (tree ref
, tree base_list
)
12291 tree binfo
, base_binfo
;
12292 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12293 unsigned max_bases
= 0; /* Maximum direct bases. */
12295 tree default_access
;
12296 tree igo_prev
; /* Track Inheritance Graph Order. */
12298 if (ref
== error_mark_node
)
12301 /* The base of a derived class is private by default, all others are
12303 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12304 && CLASSTYPE_DECLARED_CLASS (ref
)
12305 ? access_private_node
: access_public_node
);
12307 /* First, make sure that any templates in base-classes are
12308 instantiated. This ensures that if we call ourselves recursively
12309 we do not get confused about which classes are marked and which
12311 basep
= &base_list
;
12314 tree basetype
= TREE_VALUE (*basep
);
12316 /* The dependent_type_p call below should really be dependent_scope_p
12317 so that we give a hard error about using an incomplete type as a
12318 base, but we allow it with a pedwarn for backward
12320 if (processing_template_decl
12321 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12322 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12323 if (!dependent_type_p (basetype
)
12324 && !complete_type_or_else (basetype
, NULL
))
12325 /* An incomplete type. Remove it from the list. */
12326 *basep
= TREE_CHAIN (*basep
);
12330 if (TREE_TYPE (*basep
))
12332 if (CLASS_TYPE_P (basetype
))
12333 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12334 basep
= &TREE_CHAIN (*basep
);
12338 TYPE_MARKED_P (ref
) = 1;
12340 /* The binfo slot should be empty, unless this is an (ill-formed)
12342 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12344 error ("redefinition of %q#T", ref
);
12348 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12350 binfo
= make_tree_binfo (max_bases
);
12352 TYPE_BINFO (ref
) = binfo
;
12353 BINFO_OFFSET (binfo
) = size_zero_node
;
12354 BINFO_TYPE (binfo
) = ref
;
12356 /* Apply base-class info set up to the variants of this type. */
12357 fixup_type_variants (ref
);
12361 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12362 /* An aggregate cannot have baseclasses. */
12363 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12365 if (TREE_CODE (ref
) == UNION_TYPE
)
12367 error ("derived union %qT invalid", ref
);
12374 if (TYPE_FOR_JAVA (ref
))
12376 error ("Java class %qT cannot have multiple bases", ref
);
12383 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12385 if (TYPE_FOR_JAVA (ref
))
12387 error ("Java class %qT cannot have virtual bases", ref
);
12392 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12394 tree access
= TREE_PURPOSE (base_list
);
12395 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12396 tree basetype
= TREE_VALUE (base_list
);
12398 if (access
== access_default_node
)
12399 access
= default_access
;
12401 if (PACK_EXPANSION_P (basetype
))
12402 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12403 if (TREE_CODE (basetype
) == TYPE_DECL
)
12404 basetype
= TREE_TYPE (basetype
);
12405 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12407 error ("base type %qT fails to be a struct or class type",
12412 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12413 TYPE_FOR_JAVA (ref
) = 1;
12415 base_binfo
= NULL_TREE
;
12416 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12418 base_binfo
= TYPE_BINFO (basetype
);
12419 /* The original basetype could have been a typedef'd type. */
12420 basetype
= BINFO_TYPE (base_binfo
);
12422 /* Inherit flags from the base. */
12423 TYPE_HAS_NEW_OPERATOR (ref
)
12424 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12425 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12426 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12427 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12428 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12429 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12430 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12431 CLASSTYPE_REPEATED_BASE_P (ref
)
12432 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12435 /* We must do this test after we've seen through a typedef
12437 if (TYPE_MARKED_P (basetype
))
12439 if (basetype
== ref
)
12440 error ("recursive type %qT undefined", basetype
);
12442 error ("duplicate base type %qT invalid", basetype
);
12446 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12447 /* Regenerate the pack expansion for the bases. */
12448 basetype
= make_pack_expansion (basetype
);
12450 TYPE_MARKED_P (basetype
) = 1;
12452 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12453 &igo_prev
, via_virtual
);
12454 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12455 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12457 BINFO_BASE_APPEND (binfo
, base_binfo
);
12458 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12461 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12462 /* If we didn't get max_vbases vbases, we must have shared at
12463 least one of them, and are therefore diamond shaped. */
12464 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12466 /* Unmark all the types. */
12467 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12468 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12469 TYPE_MARKED_P (ref
) = 0;
12471 /* Now see if we have a repeated base type. */
12472 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12474 for (base_binfo
= binfo
; base_binfo
;
12475 base_binfo
= TREE_CHAIN (base_binfo
))
12477 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12479 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12482 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12484 for (base_binfo
= binfo
; base_binfo
;
12485 base_binfo
= TREE_CHAIN (base_binfo
))
12486 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12487 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12496 /* Copies the enum-related properties from type SRC to type DST.
12497 Used with the underlying type of an enum and the enum itself. */
12499 copy_type_enum (tree dst
, tree src
)
12502 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12504 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12505 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12506 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12507 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12508 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12509 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12510 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12511 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12512 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12516 /* Begin compiling the definition of an enumeration type.
12519 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12521 UNDERLYING_TYPE is the type that will be used as the storage for
12522 the enumeration type. This should be NULL_TREE if no storage type
12525 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12527 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12529 Returns the type object, as yet incomplete.
12530 Also records info about it so that build_enumerator
12531 may be used to declare the individual values as they are read. */
12534 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12535 bool scoped_enum_p
, bool *is_new
)
12537 tree prevtype
= NULL_TREE
;
12538 gcc_assert (identifier_p (name
));
12542 /* [C++0x dcl.enum]p5:
12544 If not explicitly specified, the underlying type of a scoped
12545 enumeration type is int. */
12546 if (!underlying_type
&& scoped_enum_p
)
12547 underlying_type
= integer_type_node
;
12549 if (underlying_type
)
12550 underlying_type
= cv_unqualified (underlying_type
);
12552 /* If this is the real definition for a previous forward reference,
12553 fill in the contents in the same object that used to be the
12554 forward reference. */
12556 enumtype
= lookup_and_check_tag (enum_type
, name
,
12557 /*tag_scope=*/ts_current
,
12558 /*template_header_p=*/false);
12560 /* In case of a template_decl, the only check that should be deferred
12561 to instantiation time is the comparison of underlying types. */
12562 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12564 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12566 error_at (input_location
, "scoped/unscoped mismatch "
12567 "in enum %q#T", enumtype
);
12568 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12569 "previous definition here");
12570 enumtype
= error_mark_node
;
12572 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12574 error_at (input_location
, "underlying type mismatch "
12575 "in enum %q#T", enumtype
);
12576 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12577 "previous definition here");
12578 enumtype
= error_mark_node
;
12580 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12581 && !dependent_type_p (underlying_type
)
12582 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12583 && !same_type_p (underlying_type
,
12584 ENUM_UNDERLYING_TYPE (enumtype
)))
12586 error_at (input_location
, "different underlying type "
12587 "in enum %q#T", enumtype
);
12588 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12589 "previous definition here");
12590 underlying_type
= NULL_TREE
;
12594 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12595 || processing_template_decl
)
12597 /* In case of error, make a dummy enum to allow parsing to
12599 if (enumtype
== error_mark_node
)
12601 name
= make_anon_name ();
12602 enumtype
= NULL_TREE
;
12605 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12606 of an opaque enum, or an opaque enum of an already defined
12607 enumeration (C++0x only).
12608 In any other case, it'll be NULL_TREE. */
12614 prevtype
= enumtype
;
12616 /* Do not push the decl more than once, unless we need to
12617 compare underlying types at instantiation time */
12619 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12620 || (underlying_type
12621 && dependent_type_p (underlying_type
))
12622 || (ENUM_UNDERLYING_TYPE (enumtype
)
12623 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12625 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12626 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12629 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12632 if (enumtype
== error_mark_node
)
12633 return error_mark_node
;
12635 /* The enum is considered opaque until the opening '{' of the
12636 enumerator list. */
12637 SET_OPAQUE_ENUM_P (enumtype
, true);
12638 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12641 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12643 if (underlying_type
)
12645 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12647 copy_type_enum (enumtype
, underlying_type
);
12648 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12650 else if (dependent_type_p (underlying_type
))
12651 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12653 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12654 underlying_type
, enumtype
);
12657 /* If into a template class, the returned enum is always the first
12658 declaration (opaque or not) seen. This way all the references to
12659 this type will be to the same declaration. The following ones are used
12660 only to check for definition errors. */
12661 if (prevtype
&& processing_template_decl
)
12667 /* After processing and defining all the values of an enumeration type,
12668 install their decls in the enumeration type.
12669 ENUMTYPE is the type object. */
12672 finish_enum_value_list (tree enumtype
)
12675 tree underlying_type
;
12678 tree minnode
, maxnode
;
12681 bool fixed_underlying_type_p
12682 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12684 /* We built up the VALUES in reverse order. */
12685 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12687 /* For an enum defined in a template, just set the type of the values;
12688 all further processing is postponed until the template is
12689 instantiated. We need to set the type so that tsubst of a CONST_DECL
12691 if (processing_template_decl
)
12693 for (values
= TYPE_VALUES (enumtype
);
12695 values
= TREE_CHAIN (values
))
12696 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12700 /* Determine the minimum and maximum values of the enumerators. */
12701 if (TYPE_VALUES (enumtype
))
12703 minnode
= maxnode
= NULL_TREE
;
12705 for (values
= TYPE_VALUES (enumtype
);
12707 values
= TREE_CHAIN (values
))
12709 decl
= TREE_VALUE (values
);
12711 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12712 each enumerator has the type of its enumeration. Prior to the
12713 closing brace, the type of each enumerator is the type of its
12714 initializing value. */
12715 TREE_TYPE (decl
) = enumtype
;
12717 /* Update the minimum and maximum values, if appropriate. */
12718 value
= DECL_INITIAL (decl
);
12719 if (value
== error_mark_node
)
12720 value
= integer_zero_node
;
12721 /* Figure out what the minimum and maximum values of the
12722 enumerators are. */
12724 minnode
= maxnode
= value
;
12725 else if (tree_int_cst_lt (maxnode
, value
))
12727 else if (tree_int_cst_lt (value
, minnode
))
12734 If the enumerator-list is empty, the underlying type is as if
12735 the enumeration had a single enumerator with value 0. */
12736 minnode
= maxnode
= integer_zero_node
;
12738 if (!fixed_underlying_type_p
)
12740 /* Compute the number of bits require to represent all values of the
12741 enumeration. We must do this before the type of MINNODE and
12742 MAXNODE are transformed, since tree_int_cst_min_precision relies
12743 on the TREE_TYPE of the value it is passed. */
12744 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12745 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12746 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12747 int precision
= MAX (lowprec
, highprec
);
12749 bool use_short_enum
;
12751 /* Determine the underlying type of the enumeration.
12755 The underlying type of an enumeration is an integral type that
12756 can represent all the enumerator values defined in the
12757 enumeration. It is implementation-defined which integral type is
12758 used as the underlying type for an enumeration except that the
12759 underlying type shall not be larger than int unless the value of
12760 an enumerator cannot fit in an int or unsigned int.
12762 We use "int" or an "unsigned int" as the underlying type, even if
12763 a smaller integral type would work, unless the user has
12764 explicitly requested that we use the smallest possible type. The
12765 user can request that for all enumerations with a command line
12766 flag, or for just one enumeration with an attribute. */
12768 use_short_enum
= flag_short_enums
12769 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12771 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12775 underlying_type
= integer_types
[itk
];
12776 if (underlying_type
!= NULL_TREE
12777 && TYPE_PRECISION (underlying_type
) >= precision
12778 && TYPE_SIGN (underlying_type
) == sgn
)
12781 if (itk
== itk_none
)
12785 IF no integral type can represent all the enumerator values, the
12786 enumeration is ill-formed. */
12787 error ("no integral type can represent all of the enumerator values "
12788 "for %qT", enumtype
);
12789 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12790 underlying_type
= integer_types
[itk_unsigned_long_long
];
12795 The value of sizeof() applied to an enumeration type, an object
12796 of an enumeration type, or an enumerator, is the value of sizeof()
12797 applied to the underlying type. */
12798 copy_type_enum (enumtype
, underlying_type
);
12800 /* Compute the minimum and maximum values for the type.
12804 For an enumeration where emin is the smallest enumerator and emax
12805 is the largest, the values of the enumeration are the values of the
12806 underlying type in the range bmin to bmax, where bmin and bmax are,
12807 respectively, the smallest and largest values of the smallest bit-
12808 field that can store emin and emax. */
12810 /* The middle-end currently assumes that types with TYPE_PRECISION
12811 narrower than their underlying type are suitably zero or sign
12812 extended to fill their mode. Similarly, it assumes that the front
12813 end assures that a value of a particular type must be within
12814 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12816 We used to set these fields based on bmin and bmax, but that led
12817 to invalid assumptions like optimizing away bounds checking. So
12818 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12819 TYPE_MAX_VALUE to the values for the mode above and only restrict
12820 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12821 ENUM_UNDERLYING_TYPE (enumtype
)
12822 = build_distinct_type_copy (underlying_type
);
12823 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12824 set_min_and_max_values_for_integral_type
12825 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12827 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12828 if (flag_strict_enums
)
12829 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12832 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12834 /* Convert each of the enumerators to the type of the underlying
12835 type of the enumeration. */
12836 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12838 location_t saved_location
;
12840 decl
= TREE_VALUE (values
);
12841 saved_location
= input_location
;
12842 input_location
= DECL_SOURCE_LOCATION (decl
);
12843 if (fixed_underlying_type_p
)
12844 /* If the enumeration type has a fixed underlying type, we
12845 already checked all of the enumerator values. */
12846 value
= DECL_INITIAL (decl
);
12848 value
= perform_implicit_conversion (underlying_type
,
12849 DECL_INITIAL (decl
),
12850 tf_warning_or_error
);
12851 input_location
= saved_location
;
12853 /* Do not clobber shared ints. */
12854 value
= copy_node (value
);
12856 TREE_TYPE (value
) = enumtype
;
12857 DECL_INITIAL (decl
) = value
;
12860 /* Fix up all variant types of this enum type. */
12861 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12862 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12864 if (at_class_scope_p ()
12865 && COMPLETE_TYPE_P (current_class_type
)
12866 && UNSCOPED_ENUM_P (enumtype
))
12867 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
12868 current_class_type
);
12870 /* Finish debugging output for this type. */
12871 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12874 /* Finishes the enum type. This is called only the first time an
12875 enumeration is seen, be it opaque or odinary.
12876 ENUMTYPE is the type object. */
12879 finish_enum (tree enumtype
)
12881 if (processing_template_decl
)
12883 if (at_function_scope_p ())
12884 add_stmt (build_min (TAG_DEFN
, enumtype
));
12888 /* If this is a forward declaration, there should not be any variants,
12889 though we can get a variant in the middle of an enum-specifier with
12890 wacky code like 'enum E { e = sizeof(const E*) };' */
12891 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12892 && (TYPE_VALUES (enumtype
)
12893 || !TYPE_NEXT_VARIANT (enumtype
)));
12896 /* Build and install a CONST_DECL for an enumeration constant of the
12897 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12898 LOC is the location of NAME.
12899 Assignment of sequential values by default is handled here. */
12902 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12908 /* If the VALUE was erroneous, pretend it wasn't there; that will
12909 result in the enum being assigned the next value in sequence. */
12910 if (value
== error_mark_node
)
12913 /* Remove no-op casts from the value. */
12915 STRIP_TYPE_NOPS (value
);
12917 if (! processing_template_decl
)
12919 /* Validate and default VALUE. */
12920 if (value
!= NULL_TREE
)
12922 value
= cxx_constant_value (value
);
12924 if (TREE_CODE (value
) != INTEGER_CST
12925 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12927 error ("enumerator value for %qD is not an integer constant",
12933 /* Default based on previous value. */
12934 if (value
== NULL_TREE
)
12936 if (TYPE_VALUES (enumtype
))
12941 /* C++03 7.2/4: If no initializer is specified for the first
12942 enumerator, the type is an unspecified integral
12943 type. Otherwise the type is the same as the type of the
12944 initializing value of the preceding enumerator unless the
12945 incremented value is not representable in that type, in
12946 which case the type is an unspecified integral type
12947 sufficient to contain the incremented value. */
12948 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12949 if (error_operand_p (prev_value
))
12950 value
= error_mark_node
;
12953 tree type
= TREE_TYPE (prev_value
);
12954 signop sgn
= TYPE_SIGN (type
);
12955 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
12959 bool pos
= !wi::neg_p (wi
, sgn
);
12960 if (!wi::fits_to_tree_p (wi
, type
))
12963 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12965 type
= integer_types
[itk
];
12966 if (type
!= NULL_TREE
12967 && (pos
|| !TYPE_UNSIGNED (type
))
12968 && wi::fits_to_tree_p (wi
, type
))
12971 if (type
&& cxx_dialect
< cxx11
12972 && itk
> itk_unsigned_long
)
12973 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12974 incremented enumerator value is too large for %<unsigned long%>" : "\
12975 incremented enumerator value is too large for %<long%>");
12977 if (type
== NULL_TREE
)
12980 value
= wide_int_to_tree (type
, wi
);
12985 error ("overflow in enumeration values at %qD", name
);
12986 value
= error_mark_node
;
12991 value
= integer_zero_node
;
12994 /* Remove no-op casts from the value. */
12995 STRIP_TYPE_NOPS (value
);
12997 /* If the underlying type of the enum is fixed, check whether
12998 the enumerator values fits in the underlying type. If it
12999 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13000 if (ENUM_UNDERLYING_TYPE (enumtype
)
13002 && TREE_CODE (value
) == INTEGER_CST
)
13004 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13005 error ("enumerator value %E is outside the range of underlying "
13006 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13008 /* Convert the value to the appropriate type. */
13009 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13013 /* C++ associates enums with global, function, or class declarations. */
13014 context
= current_scope ();
13016 /* Build the actual enumeration constant. Note that the enumeration
13017 constants have the underlying type of the enum (if it is fixed)
13018 or the type of their initializer (if the underlying type of the
13019 enum is not fixed):
13023 If the underlying type is fixed, the type of each enumerator
13024 prior to the closing brace is the underlying type; if the
13025 initializing value of an enumerator cannot be represented by
13026 the underlying type, the program is ill-formed. If the
13027 underlying type is not fixed, the type of each enumerator is
13028 the type of its initializing value.
13030 If the underlying type is not fixed, it will be computed by
13031 finish_enum and we will reset the type of this enumerator. Of
13032 course, if we're processing a template, there may be no value. */
13033 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13035 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13037 DECL_CONTEXT (decl
) = enumtype
;
13038 TREE_CONSTANT (decl
) = 1;
13039 TREE_READONLY (decl
) = 1;
13040 DECL_INITIAL (decl
) = value
;
13042 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13043 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13044 on the TYPE_FIELDS list for `S'. (That's so that you can say
13045 things like `S::i' later.) */
13046 finish_member_declaration (decl
);
13050 /* Add this enumeration constant to the list for this type. */
13051 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13054 /* Look for an enumerator with the given NAME within the enumeration
13055 type ENUMTYPE. This routine is used primarily for qualified name
13056 lookup into an enumerator in C++0x, e.g.,
13058 enum class Color { Red, Green, Blue };
13060 Color color = Color::Red;
13062 Returns the value corresponding to the enumerator, or
13063 NULL_TREE if no such enumerator was found. */
13065 lookup_enumerator (tree enumtype
, tree name
)
13068 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13070 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13071 return e
? TREE_VALUE (e
) : NULL_TREE
;
13075 /* We're defining DECL. Make sure that its type is OK. */
13078 check_function_type (tree decl
, tree current_function_parms
)
13080 tree fntype
= TREE_TYPE (decl
);
13081 tree return_type
= complete_type (TREE_TYPE (fntype
));
13083 /* In a function definition, arg types must be complete. */
13084 require_complete_types_for_parms (current_function_parms
);
13086 if (dependent_type_p (return_type
)
13087 || type_uses_auto (return_type
))
13089 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13090 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13092 tree args
= TYPE_ARG_TYPES (fntype
);
13094 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13095 error ("return type %q#T is incomplete", return_type
);
13097 error ("return type has Java class type %q#T", return_type
);
13099 /* Make it return void instead. */
13100 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13101 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13103 TREE_CHAIN (args
));
13105 fntype
= build_function_type (void_type_node
, args
);
13107 = build_exception_variant (fntype
,
13108 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13109 fntype
= (cp_build_type_attribute_variant
13110 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13111 TREE_TYPE (decl
) = fntype
;
13114 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13117 /* Create the FUNCTION_DECL for a function definition.
13118 DECLSPECS and DECLARATOR are the parts of the declaration;
13119 they describe the function's name and the type it returns,
13120 but twisted together in a fashion that parallels the syntax of C.
13122 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13123 DECLARATOR is really the DECL for the function we are about to
13124 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13125 indicating that the function is an inline defined in-class.
13127 This function creates a binding context for the function body
13128 as well as setting up the FUNCTION_DECL in current_function_decl.
13130 For C++, we must first check whether that datum makes any sense.
13131 For example, "class A local_a(1,2);" means that variable local_a
13132 is an aggregate of type A, which should have a constructor
13133 applied to it with the argument list [1, 2].
13135 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13136 or may be a BLOCK if the function has been defined previously
13137 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13138 error_mark_node if the function has never been defined, or
13139 a BLOCK if the function has been defined somewhere. */
13142 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13144 tree ctype
= NULL_TREE
;
13147 int doing_friend
= 0;
13148 cp_binding_level
*bl
;
13149 tree current_function_parms
;
13150 struct c_fileinfo
*finfo
13151 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13152 bool honor_interface
;
13154 /* Sanity check. */
13155 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13156 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13158 fntype
= TREE_TYPE (decl1
);
13159 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13160 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13162 /* ISO C++ 11.4/5. A friend function defined in a class is in
13163 the (lexical) scope of the class in which it is defined. */
13164 if (!ctype
&& DECL_FRIEND_P (decl1
))
13166 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13168 /* CTYPE could be null here if we're dealing with a template;
13169 for example, `inline friend float foo()' inside a template
13170 will have no CTYPE set. */
13171 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13177 if (DECL_DECLARED_INLINE_P (decl1
)
13178 && lookup_attribute ("noinline", attrs
))
13179 warning (0, "inline function %q+D given attribute noinline", decl1
);
13181 /* Handle gnu_inline attribute. */
13182 if (GNU_INLINE_P (decl1
))
13184 DECL_EXTERNAL (decl1
) = 1;
13185 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13186 DECL_INTERFACE_KNOWN (decl1
) = 1;
13187 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13190 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13191 /* This is a constructor, we must ensure that any default args
13192 introduced by this definition are propagated to the clones
13193 now. The clones are used directly in overload resolution. */
13194 adjust_clone_args (decl1
);
13196 /* Sometimes we don't notice that a function is a static member, and
13197 build a METHOD_TYPE for it. Fix that up now. */
13198 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13199 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13201 /* Set up current_class_type, and enter the scope of the class, if
13204 push_nested_class (ctype
);
13205 else if (DECL_STATIC_FUNCTION_P (decl1
))
13206 push_nested_class (DECL_CONTEXT (decl1
));
13208 /* Now that we have entered the scope of the class, we must restore
13209 the bindings for any template parameters surrounding DECL1, if it
13210 is an inline member template. (Order is important; consider the
13211 case where a template parameter has the same name as a field of
13212 the class.) It is not until after this point that
13213 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13214 if (flags
& SF_INCLASS_INLINE
)
13215 maybe_begin_member_template_processing (decl1
);
13217 /* Effective C++ rule 15. */
13219 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13220 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13221 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13223 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13224 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13225 if (!DECL_INITIAL (decl1
))
13226 DECL_INITIAL (decl1
) = error_mark_node
;
13228 /* This function exists in static storage.
13229 (This does not mean `static' in the C sense!) */
13230 TREE_STATIC (decl1
) = 1;
13232 /* We must call push_template_decl after current_class_type is set
13233 up. (If we are processing inline definitions after exiting a
13234 class scope, current_class_type will be NULL_TREE until set above
13235 by push_nested_class.) */
13236 if (processing_template_decl
)
13238 tree newdecl1
= push_template_decl (decl1
);
13239 if (newdecl1
== error_mark_node
)
13241 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13242 pop_nested_class ();
13248 /* We are now in the scope of the function being defined. */
13249 current_function_decl
= decl1
;
13251 /* Save the parm names or decls from this function's declarator
13252 where store_parm_decls will find them. */
13253 current_function_parms
= DECL_ARGUMENTS (decl1
);
13255 /* Make sure the parameter and return types are reasonable. When
13256 you declare a function, these types can be incomplete, but they
13257 must be complete when you define the function. */
13258 check_function_type (decl1
, current_function_parms
);
13260 /* Build the return declaration for the function. */
13261 restype
= TREE_TYPE (fntype
);
13263 if (DECL_RESULT (decl1
) == NULL_TREE
)
13267 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13268 DECL_ARTIFICIAL (resdecl
) = 1;
13269 DECL_IGNORED_P (resdecl
) = 1;
13270 DECL_RESULT (decl1
) = resdecl
;
13272 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13275 /* Let the user know we're compiling this function. */
13276 announce_function (decl1
);
13278 /* Record the decl so that the function name is defined.
13279 If we already have a decl for this name, and it is a FUNCTION_DECL,
13280 use the old decl. */
13281 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13283 /* A specialization is not used to guide overload resolution. */
13284 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13285 && !(DECL_USE_TEMPLATE (decl1
) &&
13286 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13288 tree olddecl
= pushdecl (decl1
);
13290 if (olddecl
== error_mark_node
)
13291 /* If something went wrong when registering the declaration,
13292 use DECL1; we have to have a FUNCTION_DECL to use when
13293 parsing the body of the function. */
13297 /* Otherwise, OLDDECL is either a previous declaration
13298 of the same function or DECL1 itself. */
13300 if (warn_missing_declarations
13301 && olddecl
== decl1
13302 && !DECL_MAIN_P (decl1
)
13303 && TREE_PUBLIC (decl1
)
13304 && !DECL_DECLARED_INLINE_P (decl1
))
13308 /* Check whether DECL1 is in an anonymous
13310 for (context
= DECL_CONTEXT (decl1
);
13312 context
= DECL_CONTEXT (context
))
13314 if (TREE_CODE (context
) == NAMESPACE_DECL
13315 && DECL_NAME (context
) == NULL_TREE
)
13319 if (context
== NULL
)
13320 warning (OPT_Wmissing_declarations
,
13321 "no previous declaration for %q+D", decl1
);
13329 /* We need to set the DECL_CONTEXT. */
13330 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13331 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13333 fntype
= TREE_TYPE (decl1
);
13334 restype
= TREE_TYPE (fntype
);
13336 /* If #pragma weak applies, mark the decl appropriately now.
13337 The pragma only applies to global functions. Because
13338 determining whether or not the #pragma applies involves
13339 computing the mangled name for the declaration, we cannot
13340 apply the pragma until after we have merged this declaration
13341 with any previous declarations; if the original declaration
13342 has a linkage specification, that specification applies to
13343 the definition as well, and may affect the mangled name. */
13344 if (DECL_FILE_SCOPE_P (decl1
))
13345 maybe_apply_pragma_weak (decl1
);
13348 /* Reset this in case the call to pushdecl changed it. */
13349 current_function_decl
= decl1
;
13351 gcc_assert (DECL_INITIAL (decl1
));
13353 /* This function may already have been parsed, in which case just
13354 return; our caller will skip over the body without parsing. */
13355 if (DECL_INITIAL (decl1
) != error_mark_node
)
13358 /* Initialize RTL machinery. We cannot do this until
13359 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13360 even when processing a template; this is how we get
13361 CFUN set up, and our per-function variables initialized.
13362 FIXME factor out the non-RTL stuff. */
13363 bl
= current_binding_level
;
13364 allocate_struct_function (decl1
, processing_template_decl
);
13366 /* Initialize the language data structures. Whenever we start
13367 a new function, we destroy temporaries in the usual way. */
13368 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13369 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13370 current_binding_level
= bl
;
13372 if (!processing_template_decl
&& type_uses_auto (restype
))
13374 FNDECL_USED_AUTO (decl1
) = true;
13375 current_function_auto_return_pattern
= restype
;
13378 /* Start the statement-tree, start the tree now. */
13379 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13381 /* If we are (erroneously) defining a function that we have already
13382 defined before, wipe out what we knew before. */
13383 if (!DECL_PENDING_INLINE_P (decl1
))
13384 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13386 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13388 /* We know that this was set up by `grokclassfn'. We do not
13389 wait until `store_parm_decls', since evil parse errors may
13390 never get us to that point. Here we keep the consistency
13391 between `current_class_type' and `current_class_ptr'. */
13392 tree t
= DECL_ARGUMENTS (decl1
);
13394 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13395 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13397 cp_function_chain
->x_current_class_ref
13398 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13399 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13400 cp_function_chain
->x_current_class_ptr
= t
;
13402 /* Constructors and destructors need to know whether they're "in
13403 charge" of initializing virtual base classes. */
13404 t
= DECL_CHAIN (t
);
13405 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13407 current_in_charge_parm
= t
;
13408 t
= DECL_CHAIN (t
);
13410 if (DECL_HAS_VTT_PARM_P (decl1
))
13412 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13413 current_vtt_parm
= t
;
13417 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13418 /* Implicitly-defined methods (like the
13419 destructor for a class in which no destructor
13420 is explicitly declared) must not be defined
13421 until their definition is needed. So, we
13422 ignore interface specifications for
13423 compiler-generated functions. */
13424 && !DECL_ARTIFICIAL (decl1
));
13426 if (processing_template_decl
)
13427 /* Don't mess with interface flags. */;
13428 else if (DECL_INTERFACE_KNOWN (decl1
))
13430 tree ctx
= decl_function_context (decl1
);
13432 if (DECL_NOT_REALLY_EXTERN (decl1
))
13433 DECL_EXTERNAL (decl1
) = 0;
13435 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13436 /* This is a function in a local class in an extern inline
13437 or template function. */
13438 comdat_linkage (decl1
);
13440 /* If this function belongs to an interface, it is public.
13441 If it belongs to someone else's interface, it is also external.
13442 This only affects inlines and template instantiations. */
13443 else if (!finfo
->interface_unknown
&& honor_interface
)
13445 if (DECL_DECLARED_INLINE_P (decl1
)
13446 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13448 DECL_EXTERNAL (decl1
)
13449 = (finfo
->interface_only
13450 || (DECL_DECLARED_INLINE_P (decl1
)
13451 && ! flag_implement_inlines
13452 && !DECL_VINDEX (decl1
)));
13454 /* For WIN32 we also want to put these in linkonce sections. */
13455 maybe_make_one_only (decl1
);
13458 DECL_EXTERNAL (decl1
) = 0;
13459 DECL_INTERFACE_KNOWN (decl1
) = 1;
13460 /* If this function is in an interface implemented in this file,
13461 make sure that the back end knows to emit this function
13463 if (!DECL_EXTERNAL (decl1
))
13464 mark_needed (decl1
);
13466 else if (finfo
->interface_unknown
&& finfo
->interface_only
13467 && honor_interface
)
13469 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13470 interface, we will have both finfo->interface_unknown and
13471 finfo->interface_only set. In that case, we don't want to
13472 use the normal heuristics because someone will supply a
13473 #pragma implementation elsewhere, and deducing it here would
13474 produce a conflict. */
13475 comdat_linkage (decl1
);
13476 DECL_EXTERNAL (decl1
) = 0;
13477 DECL_INTERFACE_KNOWN (decl1
) = 1;
13478 DECL_DEFER_OUTPUT (decl1
) = 1;
13482 /* This is a definition, not a reference.
13483 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13484 if (!GNU_INLINE_P (decl1
))
13485 DECL_EXTERNAL (decl1
) = 0;
13487 if ((DECL_DECLARED_INLINE_P (decl1
)
13488 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13489 && ! DECL_INTERFACE_KNOWN (decl1
))
13490 DECL_DEFER_OUTPUT (decl1
) = 1;
13492 DECL_INTERFACE_KNOWN (decl1
) = 1;
13495 /* Determine the ELF visibility attribute for the function. We must not
13496 do this before calling "pushdecl", as we must allow "duplicate_decls"
13497 to merge any attributes appropriately. We also need to wait until
13499 if (!DECL_CLONED_FUNCTION_P (decl1
))
13500 determine_visibility (decl1
);
13502 if (!processing_template_decl
)
13503 maybe_instantiate_noexcept (decl1
);
13505 begin_scope (sk_function_parms
, decl1
);
13509 if (DECL_DESTRUCTOR_P (decl1
)
13510 || (DECL_CONSTRUCTOR_P (decl1
)
13511 && targetm
.cxx
.cdtor_returns_this ()))
13513 cdtor_label
= build_decl (input_location
,
13514 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13515 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
13518 start_fname_decls ();
13520 store_parm_decls (current_function_parms
);
13526 /* Like start_preparsed_function, except that instead of a
13527 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13529 Returns true on success. If the DECLARATOR is not suitable
13530 for a function, we return false, which tells the parser to
13531 skip the entire function. */
13534 start_function (cp_decl_specifier_seq
*declspecs
,
13535 const cp_declarator
*declarator
,
13540 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13541 if (decl1
== error_mark_node
)
13543 /* If the declarator is not suitable for a function definition,
13544 cause a syntax error. */
13545 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13547 error ("invalid function declaration");
13551 if (DECL_MAIN_P (decl1
))
13552 /* main must return int. grokfndecl should have corrected it
13553 (and issued a diagnostic) if the user got it wrong. */
13554 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13555 integer_type_node
));
13557 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13560 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13564 use_eh_spec_block (tree fn
)
13566 return (flag_exceptions
&& flag_enforce_eh_specs
13567 && !processing_template_decl
13568 && !type_throw_all_p (TREE_TYPE (fn
))
13569 /* We insert the EH_SPEC_BLOCK only in the original
13570 function; then, it is copied automatically to the
13572 && !DECL_CLONED_FUNCTION_P (fn
)
13573 /* Implicitly-generated constructors and destructors have
13574 exception specifications. However, those specifications
13575 are the union of the possible exceptions specified by the
13576 constructors/destructors for bases and members, so no
13577 unallowed exception will ever reach this function. By
13578 not creating the EH_SPEC_BLOCK we save a little memory,
13579 and we avoid spurious warnings about unreachable
13581 && !DECL_DEFAULTED_FN (fn
));
13584 /* Store the parameter declarations into the current function declaration.
13585 This is called after parsing the parameter declarations, before
13586 digesting the body of the function.
13588 Also install to binding contour return value identifier, if any. */
13591 store_parm_decls (tree current_function_parms
)
13593 tree fndecl
= current_function_decl
;
13596 /* This is a chain of any other decls that came in among the parm
13597 declarations. If a parm is declared with enum {foo, bar} x;
13598 then CONST_DECLs for foo and bar are put here. */
13599 tree nonparms
= NULL_TREE
;
13601 if (current_function_parms
)
13603 /* This case is when the function was defined with an ANSI prototype.
13604 The parms already have decls, so we need not do anything here
13605 except record them as in effect
13606 and complain if any redundant old-style parm decls were written. */
13608 tree specparms
= current_function_parms
;
13611 /* Must clear this because it might contain TYPE_DECLs declared
13613 current_binding_level
->names
= NULL
;
13615 /* If we're doing semantic analysis, then we'll call pushdecl
13616 for each of these. We must do them in reverse order so that
13617 they end in the correct forward order. */
13618 specparms
= nreverse (specparms
);
13620 for (parm
= specparms
; parm
; parm
= next
)
13622 next
= DECL_CHAIN (parm
);
13623 if (TREE_CODE (parm
) == PARM_DECL
)
13625 if (DECL_NAME (parm
) == NULL_TREE
13626 || !VOID_TYPE_P (parm
))
13629 error ("parameter %qD declared void", parm
);
13633 /* If we find an enum constant or a type tag,
13634 put it aside for the moment. */
13635 TREE_CHAIN (parm
) = NULL_TREE
;
13636 nonparms
= chainon (nonparms
, parm
);
13640 /* Get the decls in their original chain order and record in the
13641 function. This is all and only the PARM_DECLs that were
13642 pushed into scope by the loop above. */
13643 DECL_ARGUMENTS (fndecl
) = getdecls ();
13646 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13648 /* Now store the final chain of decls for the arguments
13649 as the decl-chain of the current lexical scope.
13650 Put the enumerators in as well, at the front so that
13651 DECL_ARGUMENTS is not modified. */
13652 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13654 if (use_eh_spec_block (current_function_decl
))
13655 current_eh_spec_block
= begin_eh_spec_block ();
13659 /* We have finished doing semantic analysis on DECL, but have not yet
13660 generated RTL for its body. Save away our current state, so that
13661 when we want to generate RTL later we know what to do. */
13664 save_function_data (tree decl
)
13666 struct language_function
*f
;
13668 /* Save the language-specific per-function data so that we can
13669 get it back when we really expand this function. */
13670 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13673 f
= ggc_alloc
<language_function
> ();
13674 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13675 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13677 /* Clear out the bits we don't need. */
13678 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13679 f
->bindings
= NULL
;
13680 f
->x_local_names
= NULL
;
13681 f
->base
.local_typedefs
= NULL
;
13685 /* Set the return value of the constructor (if present). */
13688 finish_constructor_body (void)
13693 if (targetm
.cxx
.cdtor_returns_this ()
13694 && (! TYPE_FOR_JAVA (current_class_type
)))
13696 /* Any return from a constructor will end up here. */
13697 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13699 val
= DECL_ARGUMENTS (current_function_decl
);
13700 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13701 DECL_RESULT (current_function_decl
), val
);
13702 /* Return the address of the object. */
13703 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13704 add_stmt (exprstmt
);
13708 /* Do all the processing for the beginning of a destructor; set up the
13709 vtable pointers and cleanups for bases and members. */
13712 begin_destructor_body (void)
13714 tree compound_stmt
;
13716 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13717 issued an error message. We still want to try to process the
13718 body of the function, but initialize_vtbl_ptrs will crash if
13719 TYPE_BINFO is NULL. */
13720 if (COMPLETE_TYPE_P (current_class_type
))
13722 compound_stmt
= begin_compound_stmt (0);
13723 /* Make all virtual function table pointers in non-virtual base
13724 classes point to CURRENT_CLASS_TYPE's virtual function
13726 initialize_vtbl_ptrs (current_class_ptr
);
13727 finish_compound_stmt (compound_stmt
);
13729 /* Insert a cleanup to let the back end know that the object is dead
13730 when we exit the destructor, either normally or via exception. */
13731 tree clobber
= build_constructor (current_class_type
, NULL
);
13732 TREE_THIS_VOLATILE (clobber
) = true;
13733 tree exprstmt
= build2 (MODIFY_EXPR
, current_class_type
,
13734 current_class_ref
, clobber
);
13735 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13737 /* And insert cleanups for our bases and members so that they
13738 will be properly destroyed if we throw. */
13739 push_base_cleanups ();
13743 /* At the end of every destructor we generate code to delete the object if
13744 necessary. Do that now. */
13747 finish_destructor_body (void)
13751 /* Any return from a destructor will end up here; that way all base
13752 and member cleanups will be run when the function returns. */
13753 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13755 /* In a virtual destructor, we must call delete. */
13756 if (DECL_VIRTUAL_P (current_function_decl
))
13759 tree virtual_size
= cxx_sizeof (current_class_type
);
13763 At the point of definition of a virtual destructor (including
13764 an implicit definition), non-placement operator delete shall
13765 be looked up in the scope of the destructor's class and if
13766 found shall be accessible and unambiguous. */
13767 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13769 /*global_p=*/false,
13770 /*placement=*/NULL_TREE
,
13771 /*alloc_fn=*/NULL_TREE
,
13772 tf_warning_or_error
);
13774 if_stmt
= begin_if_stmt ();
13775 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13776 current_in_charge_parm
,
13779 finish_expr_stmt (exprstmt
);
13780 finish_then_clause (if_stmt
);
13781 finish_if_stmt (if_stmt
);
13784 if (targetm
.cxx
.cdtor_returns_this ())
13788 val
= DECL_ARGUMENTS (current_function_decl
);
13789 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13790 DECL_RESULT (current_function_decl
), val
);
13791 /* Return the address of the object. */
13792 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13793 add_stmt (exprstmt
);
13797 /* Do the necessary processing for the beginning of a function body, which
13798 in this case includes member-initializers, but not the catch clauses of
13799 a function-try-block. Currently, this means opening a binding level
13800 for the member-initializers (in a ctor), member cleanups (in a dtor),
13801 and capture proxies (in a lambda operator()). */
13804 begin_function_body (void)
13808 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13811 if (processing_template_decl
)
13812 /* Do nothing now. */;
13814 /* Always keep the BLOCK node associated with the outermost pair of
13815 curly braces of a function. These are needed for correct
13816 operation of dwarfout.c. */
13817 keep_next_level (true);
13819 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13821 if (processing_template_decl
)
13822 /* Do nothing now. */;
13823 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13824 begin_destructor_body ();
13829 /* Do the processing for the end of a function body. Currently, this means
13830 closing out the cleanups for fully-constructed bases and members, and in
13831 the case of the destructor, deleting the object if desired. Again, this
13832 is only meaningful for [cd]tors, since they are the only functions where
13833 there is a significant distinction between the main body and any
13834 function catch clauses. Handling, say, main() return semantics here
13835 would be wrong, as flowing off the end of a function catch clause for
13836 main() would also need to return 0. */
13839 finish_function_body (tree compstmt
)
13841 if (compstmt
== NULL_TREE
)
13844 /* Close the block. */
13845 finish_compound_stmt (compstmt
);
13847 if (processing_template_decl
)
13848 /* Do nothing now. */;
13849 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13850 finish_constructor_body ();
13851 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13852 finish_destructor_body ();
13855 /* Given a function, returns the BLOCK corresponding to the outermost level
13856 of curly braces, skipping the artificial block created for constructor
13860 outer_curly_brace_block (tree fndecl
)
13862 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13863 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13864 /* Skip the artificial function body block. */
13865 block
= BLOCK_SUBBLOCKS (block
);
13869 /* If FNDECL is a class's key method, add the class to the list of
13870 keyed classes that should be emitted. */
13873 record_key_method_defined (tree fndecl
)
13875 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13876 && DECL_VIRTUAL_P (fndecl
)
13877 && !processing_template_decl
)
13879 tree fnclass
= DECL_CONTEXT (fndecl
);
13880 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13881 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13885 /* Subroutine of finish_function.
13886 Save the body of constexpr functions for possible
13887 future compile time evaluation. */
13890 maybe_save_function_definition (tree fun
)
13892 if (!processing_template_decl
13893 && DECL_DECLARED_CONSTEXPR_P (fun
)
13894 && !DECL_CLONED_FUNCTION_P (fun
))
13895 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13898 /* Finish up a function declaration and compile that function
13899 all the way to assembler language output. The free the storage
13900 for the function definition.
13902 FLAGS is a bitwise or of the following values:
13904 We just finished processing the body of an in-class inline
13905 function definition. (This processing will have taken place
13906 after the class definition is complete.) */
13909 finish_function (int flags
)
13911 tree fndecl
= current_function_decl
;
13912 tree fntype
, ctype
= NULL_TREE
;
13913 int inclass_inline
= (flags
& 2) != 0;
13915 /* When we get some parse errors, we can end up without a
13916 current_function_decl, so cope. */
13917 if (fndecl
== NULL_TREE
)
13918 return error_mark_node
;
13920 if (c_dialect_objc ())
13921 objc_finish_function ();
13923 gcc_assert (!defer_mark_used_calls
);
13924 defer_mark_used_calls
= true;
13926 record_key_method_defined (fndecl
);
13928 fntype
= TREE_TYPE (fndecl
);
13930 /* TREE_READONLY (fndecl) = 1;
13931 This caused &foo to be of type ptr-to-const-function
13932 which then got a warning when stored in a ptr-to-function variable. */
13934 gcc_assert (building_stmt_list_p ());
13935 /* The current function is being defined, so its DECL_INITIAL should
13936 be set, and unless there's a multiple definition, it should be
13937 error_mark_node. */
13938 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13940 /* For a cloned function, we've already got all the code we need;
13941 there's no need to add any extra bits. */
13942 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13944 /* Make it so that `main' always returns 0 by default. */
13945 if (DECL_MAIN_P (current_function_decl
))
13946 finish_return_stmt (integer_zero_node
);
13948 if (use_eh_spec_block (current_function_decl
))
13949 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13950 (TREE_TYPE (current_function_decl
)),
13951 current_eh_spec_block
);
13954 /* If we're saving up tree structure, tie off the function now. */
13955 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13957 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
13958 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
13960 finish_fname_decls ();
13962 /* If this function can't throw any exceptions, remember that. */
13963 if (!processing_template_decl
13964 && !cp_function_chain
->can_throw
13965 && !flag_non_call_exceptions
13966 && !decl_replaceable_p (fndecl
))
13967 TREE_NOTHROW (fndecl
) = 1;
13969 /* This must come after expand_function_end because cleanups might
13970 have declarations (from inline functions) that need to go into
13971 this function's blocks. */
13973 /* If the current binding level isn't the outermost binding level
13974 for this function, either there is a bug, or we have experienced
13975 syntax errors and the statement tree is malformed. */
13976 if (current_binding_level
->kind
!= sk_function_parms
)
13978 /* Make sure we have already experienced errors. */
13979 gcc_assert (errorcount
);
13981 /* Throw away the broken statement tree and extra binding
13983 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13985 while (current_binding_level
->kind
!= sk_function_parms
)
13987 if (current_binding_level
->kind
== sk_class
)
13988 pop_nested_class ();
13990 poplevel (0, 0, 0);
13993 poplevel (1, 0, 1);
13995 /* Statements should always be full-expressions at the outermost set
13996 of curly braces for a function. */
13997 gcc_assert (stmts_are_full_exprs_p ());
13999 /* If there are no return statements in a function with auto return type,
14000 the return type is void. But if the declared type is something like
14001 auto*, this is an error. */
14002 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14003 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14005 if (!is_auto (current_function_auto_return_pattern
)
14006 && !current_function_returns_value
&& !current_function_returns_null
)
14008 error ("no return statements in function returning %qT",
14009 current_function_auto_return_pattern
);
14010 inform (input_location
, "only plain %<auto%> return type can be "
14011 "deduced to %<void%>");
14013 apply_deduced_return_type (fndecl
, void_type_node
);
14014 fntype
= TREE_TYPE (fndecl
);
14017 /* Save constexpr function body before it gets munged by
14018 the NRV transformation. */
14019 maybe_save_function_definition (fndecl
);
14021 /* Set up the named return value optimization, if we can. Candidate
14022 variables are selected in check_return_expr. */
14023 if (current_function_return_value
)
14025 tree r
= current_function_return_value
;
14028 if (r
!= error_mark_node
14029 /* This is only worth doing for fns that return in memory--and
14030 simpler, since we don't have to worry about promoted modes. */
14031 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14032 /* Only allow this for variables declared in the outer scope of
14033 the function so we know that their lifetime always ends with a
14034 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14035 we were to do this optimization in tree-ssa. */
14036 && (outer
= outer_curly_brace_block (fndecl
))
14037 && chain_member (r
, BLOCK_VARS (outer
)))
14038 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14040 current_function_return_value
= NULL_TREE
;
14043 /* Remember that we were in class scope. */
14044 if (current_class_name
)
14045 ctype
= current_class_type
;
14047 /* Must mark the RESULT_DECL as being in this function. */
14048 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14050 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14051 to the FUNCTION_DECL node itself. */
14052 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14054 /* Save away current state, if appropriate. */
14055 if (!processing_template_decl
)
14056 save_function_data (fndecl
);
14058 /* Complain if there's just no return statement. */
14059 if (warn_return_type
14060 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14061 && !dependent_type_p (TREE_TYPE (fntype
))
14062 && !current_function_returns_value
&& !current_function_returns_null
14063 /* Don't complain if we abort or throw. */
14064 && !current_function_returns_abnormally
14065 /* Don't complain if there's an infinite loop. */
14066 && !current_function_infinite_loop
14067 /* Don't complain if we are declared noreturn. */
14068 && !TREE_THIS_VOLATILE (fndecl
)
14069 && !DECL_NAME (DECL_RESULT (fndecl
))
14070 && !TREE_NO_WARNING (fndecl
)
14071 /* Structor return values (if any) are set by the compiler. */
14072 && !DECL_CONSTRUCTOR_P (fndecl
)
14073 && !DECL_DESTRUCTOR_P (fndecl
)
14074 && targetm
.warn_func_return (fndecl
))
14076 warning (OPT_Wreturn_type
,
14077 "no return statement in function returning non-void");
14078 TREE_NO_WARNING (fndecl
) = 1;
14081 /* Store the end of the function, so that we get good line number
14082 info for the epilogue. */
14083 cfun
->function_end_locus
= input_location
;
14085 /* Complain about parameters that are only set, but never otherwise used. */
14086 if (warn_unused_but_set_parameter
14087 && !processing_template_decl
14088 && errorcount
== unused_but_set_errorcount
14089 && !DECL_CLONED_FUNCTION_P (fndecl
))
14093 for (decl
= DECL_ARGUMENTS (fndecl
);
14095 decl
= DECL_CHAIN (decl
))
14096 if (TREE_USED (decl
)
14097 && TREE_CODE (decl
) == PARM_DECL
14098 && !DECL_READ_P (decl
)
14099 && DECL_NAME (decl
)
14100 && !DECL_ARTIFICIAL (decl
)
14101 && !TREE_NO_WARNING (decl
)
14102 && !DECL_IN_SYSTEM_HEADER (decl
)
14103 && TREE_TYPE (decl
) != error_mark_node
14104 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14105 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14106 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14107 warning (OPT_Wunused_but_set_parameter
,
14108 "parameter %q+D set but not used", decl
);
14109 unused_but_set_errorcount
= errorcount
;
14112 /* Complain about locally defined typedefs that are not used in this
14114 maybe_warn_unused_local_typedefs ();
14116 /* Genericize before inlining. */
14117 if (!processing_template_decl
)
14119 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14120 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14121 cp_genericize (fndecl
);
14122 /* Clear out the bits we don't need. */
14123 f
->x_current_class_ptr
= NULL
;
14124 f
->x_current_class_ref
= NULL
;
14125 f
->x_eh_spec_block
= NULL
;
14126 f
->x_in_charge_parm
= NULL
;
14127 f
->x_vtt_parm
= NULL
;
14128 f
->x_return_value
= NULL
;
14129 f
->bindings
= NULL
;
14130 f
->extern_decl_map
= NULL
;
14131 f
->infinite_loops
= NULL
;
14133 /* Clear out the bits we don't need. */
14134 local_names
= NULL
;
14136 /* We're leaving the context of this function, so zap cfun. It's still in
14137 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14139 current_function_decl
= NULL
;
14141 /* If this is an in-class inline definition, we may have to pop the
14142 bindings for the template parameters that we added in
14143 maybe_begin_member_template_processing when start_function was
14145 if (inclass_inline
)
14146 maybe_end_member_template_processing ();
14148 /* Leave the scope of the class. */
14150 pop_nested_class ();
14155 current_function_decl
= NULL_TREE
;
14157 defer_mark_used_calls
= false;
14158 if (deferred_mark_used_calls
)
14163 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14165 vec_free (deferred_mark_used_calls
);
14171 /* Create the FUNCTION_DECL for a function definition.
14172 DECLSPECS and DECLARATOR are the parts of the declaration;
14173 they describe the return type and the name of the function,
14174 but twisted together in a fashion that parallels the syntax of C.
14176 This function creates a binding context for the function body
14177 as well as setting up the FUNCTION_DECL in current_function_decl.
14179 Returns a FUNCTION_DECL on success.
14181 If the DECLARATOR is not suitable for a function (it defines a datum
14182 instead), we return 0, which tells yyparse to report a parse error.
14184 May return void_type_node indicating that this method is actually
14185 a friend. See grokfield for more details.
14187 Came here with a `.pushlevel' .
14189 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14190 CHANGES TO CODE IN `grokfield'. */
14193 grokmethod (cp_decl_specifier_seq
*declspecs
,
14194 const cp_declarator
*declarator
, tree attrlist
)
14196 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14199 if (fndecl
== error_mark_node
)
14200 return error_mark_node
;
14202 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14204 error ("invalid member function declaration");
14205 return error_mark_node
;
14209 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14211 /* Pass friends other than inline friend functions back. */
14212 if (fndecl
== void_type_node
)
14215 if (DECL_IN_AGGR_P (fndecl
))
14217 if (DECL_CLASS_SCOPE_P (fndecl
))
14218 error ("%qD is already defined in class %qT", fndecl
,
14219 DECL_CONTEXT (fndecl
));
14220 return error_mark_node
;
14223 check_template_shadow (fndecl
);
14225 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14226 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14228 /* We process method specializations in finish_struct_1. */
14229 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14231 fndecl
= push_template_decl (fndecl
);
14232 if (fndecl
== error_mark_node
)
14236 if (! DECL_FRIEND_P (fndecl
))
14238 if (DECL_CHAIN (fndecl
))
14240 fndecl
= copy_node (fndecl
);
14241 TREE_CHAIN (fndecl
) = NULL_TREE
;
14245 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14247 DECL_IN_AGGR_P (fndecl
) = 1;
14252 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14253 we can lay it out later, when and if its type becomes complete.
14255 Also handle constexpr pointer to member variables where the initializer
14256 is an unlowered PTRMEM_CST because the class isn't complete yet. */
14259 maybe_register_incomplete_var (tree var
)
14261 gcc_assert (VAR_P (var
));
14263 /* Keep track of variables with incomplete types. */
14264 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14265 && DECL_EXTERNAL (var
))
14267 tree inner_type
= TREE_TYPE (var
);
14269 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14270 inner_type
= TREE_TYPE (inner_type
);
14271 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14273 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14274 /* RTTI TD entries are created while defining the type_info. */
14275 || (TYPE_LANG_SPECIFIC (inner_type
)
14276 && TYPE_BEING_DEFINED (inner_type
)))
14278 incomplete_var iv
= {var
, inner_type
};
14279 vec_safe_push (incomplete_vars
, iv
);
14281 else if (TYPE_PTRMEM_P (inner_type
)
14282 && DECL_INITIAL (var
)
14283 && TREE_CODE (DECL_INITIAL (var
)) == PTRMEM_CST
)
14285 tree context
= TYPE_PTRMEM_CLASS_TYPE (inner_type
);
14286 gcc_assert (TYPE_BEING_DEFINED (context
));
14287 incomplete_var iv
= {var
, context
};
14288 vec_safe_push (incomplete_vars
, iv
);
14293 /* Called when a class type (given by TYPE) is defined. If there are
14294 any existing VAR_DECLs whose type has been completed by this
14295 declaration, update them now. */
14298 complete_vars (tree type
)
14301 incomplete_var
*iv
;
14303 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14305 if (same_type_p (type
, iv
->incomplete_type
))
14307 tree var
= iv
->decl
;
14308 tree type
= TREE_TYPE (var
);
14310 if (TYPE_PTRMEM_P (type
))
14311 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14314 /* Complete the type of the variable. The VAR_DECL itself
14315 will be laid out in expand_expr. */
14316 complete_type (type
);
14317 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14320 /* Remove this entry from the list. */
14321 incomplete_vars
->unordered_remove (ix
);
14327 /* Check for pending declarations which may have abstract type. */
14328 complete_type_check_abstract (type
);
14331 /* If DECL is of a type which needs a cleanup, build and return an
14332 expression to perform that cleanup here. Return NULL_TREE if no
14333 cleanup need be done. */
14336 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14342 /* Assume no cleanup is required. */
14343 cleanup
= NULL_TREE
;
14345 if (error_operand_p (decl
))
14348 /* Handle "__attribute__((cleanup))". We run the cleanup function
14349 before the destructor since the destructor is what actually
14350 terminates the lifetime of the object. */
14351 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14358 /* Get the name specified by the user for the cleanup function. */
14359 id
= TREE_VALUE (TREE_VALUE (attr
));
14360 /* Look up the name to find the cleanup function to call. It is
14361 important to use lookup_name here because that is what is
14362 used in c-common.c:handle_cleanup_attribute when performing
14363 initial checks on the attribute. Note that those checks
14364 include ensuring that the function found is not an overloaded
14365 function, or an object with an overloaded call operator,
14366 etc.; we can rely on the fact that the function found is an
14367 ordinary FUNCTION_DECL. */
14368 fn
= lookup_name (id
);
14369 arg
= build_address (decl
);
14371 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14372 if (cleanup
== error_mark_node
)
14373 return error_mark_node
;
14375 /* Handle ordinary C++ destructors. */
14376 type
= TREE_TYPE (decl
);
14377 if (type_build_dtor_call (type
))
14379 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14383 if (TREE_CODE (type
) == ARRAY_TYPE
)
14386 addr
= build_address (decl
);
14388 call
= build_delete (TREE_TYPE (addr
), addr
,
14389 sfk_complete_destructor
, flags
, 0, complain
);
14390 if (call
== error_mark_node
)
14391 cleanup
= error_mark_node
;
14392 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14393 /* Discard the call. */;
14395 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14400 /* build_delete sets the location of the destructor call to the
14401 current location, even though the destructor is going to be
14402 called later, at the end of the current scope. This can lead to
14403 a "jumpy" behaviour for users of debuggers when they step around
14404 the end of the block. So let's unset the location of the
14405 destructor call instead. */
14406 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14407 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14410 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
))))
14411 /* Treat objects with destructors as used; the destructor may do
14412 something substantive. */
14419 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14420 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14421 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14424 static_fn_type (tree memfntype
)
14429 if (TYPE_PTRMEMFUNC_P (memfntype
))
14430 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14431 if (POINTER_TYPE_P (memfntype
)
14432 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14433 memfntype
= TREE_TYPE (memfntype
);
14434 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14436 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14437 args
= TYPE_ARG_TYPES (memfntype
);
14438 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14439 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14440 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14441 fntype
= (cp_build_type_attribute_variant
14442 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14443 fntype
= (build_exception_variant
14444 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14445 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14446 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14450 /* DECL was originally constructed as a non-static member function,
14451 but turned out to be static. Update it accordingly. */
14454 revert_static_member_fn (tree decl
)
14456 tree stype
= static_fn_type (decl
);
14457 cp_cv_quals quals
= type_memfn_quals (stype
);
14458 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14460 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14461 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14463 TREE_TYPE (decl
) = stype
;
14465 if (DECL_ARGUMENTS (decl
))
14466 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14467 DECL_STATIC_FUNCTION_P (decl
) = 1;
14470 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14471 one of the language-independent trees. */
14473 enum cp_tree_node_structure_enum
14474 cp_tree_node_structure (union lang_tree_node
* t
)
14476 switch (TREE_CODE (&t
->generic
))
14478 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14479 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14480 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14481 case OVERLOAD
: return TS_CP_OVERLOAD
;
14482 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14483 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14484 case BASELINK
: return TS_CP_BASELINK
;
14485 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14486 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14487 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14488 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14489 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14490 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14491 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14492 default: return TS_CP_GENERIC
;
14496 /* Build the void_list_node (void_type_node having been created). */
14498 build_void_list_node (void)
14500 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14505 cp_missing_noreturn_ok_p (tree decl
)
14507 /* A missing noreturn is ok for the `main' function. */
14508 return DECL_MAIN_P (decl
);
14511 /* Return the decl used to identify the COMDAT group into which DECL should
14515 cxx_comdat_group (tree decl
)
14517 /* Virtual tables, construction virtual tables, and virtual table
14518 tables all go in a single COMDAT group, named after the primary
14520 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14521 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14522 /* For all other DECLs, the COMDAT group is the mangled name of the
14523 declaration itself. */
14526 while (DECL_THUNK_P (decl
))
14528 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14529 into the same section as the target function. In that case
14530 we must return target's name. */
14531 tree target
= THUNK_TARGET (decl
);
14532 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14533 && DECL_SECTION_NAME (target
) != NULL
14534 && DECL_ONE_ONLY (target
))
14544 /* Returns the return type for FN as written by the user, which may include
14545 a placeholder for a deduced return type. */
14548 fndecl_declared_return_type (tree fn
)
14550 fn
= STRIP_TEMPLATE (fn
);
14551 if (FNDECL_USED_AUTO (fn
))
14553 struct language_function
*f
= NULL
;
14554 if (DECL_STRUCT_FUNCTION (fn
))
14555 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14557 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14558 return f
->x_auto_return_pattern
;
14560 return TREE_TYPE (TREE_TYPE (fn
));
14563 /* Returns true iff DECL was declared with an auto return type and it has
14564 not yet been deduced to a real type. */
14567 undeduced_auto_decl (tree decl
)
14569 if (cxx_dialect
< cxx1y
)
14571 return type_uses_auto (TREE_TYPE (decl
));
14574 /* Complain if DECL has an undeduced return type. */
14577 require_deduced_type (tree decl
)
14579 if (undeduced_auto_decl (decl
))
14580 error ("use of %qD before deduction of %<auto%>", decl
);
14583 #include "gt-cp-decl.h"