1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2015 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
31 #include "coretypes.h"
36 #include "tree-hasher.h"
37 #include "stringpool.h"
38 #include "stor-layout.h"
44 #include "tree-iterator.h"
45 #include "tree-inline.h"
51 #include "c-family/c-common.h"
52 #include "c-family/c-objc.h"
53 #include "c-family/c-pragma.h"
54 #include "c-family/c-target.h"
55 #include "c-family/c-ubsan.h"
56 #include "diagnostic.h"
60 #include "splay-tree.h"
62 #include "hard-reg-set.h"
68 /* Possible cases of bad specifiers type used by bad_specifiers. */
70 BSP_VAR
, /* variable */
71 BSP_PARM
, /* parameter */
76 static tree
grokparms (tree parmlist
, tree
*);
77 static const char *redeclaration_error_message (tree
, tree
);
79 static int decl_jump_unsafe (tree
);
80 static void require_complete_types_for_parms (tree
);
81 static int ambi_op_p (enum tree_code
);
82 static int unary_op_p (enum tree_code
);
83 static void push_local_name (tree
);
84 static tree
grok_reference_init (tree
, tree
, tree
, int);
85 static tree
grokvardecl (tree
, tree
, tree
, const cp_decl_specifier_seq
*,
87 static int check_static_variable_definition (tree
, tree
);
88 static void record_unknown_type (tree
, const char *);
89 static tree
builtin_function_1 (tree
, tree
, bool);
90 static int member_function_or_else (tree
, tree
, enum overload_flags
);
91 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
93 static void check_for_uninitialized_const_var (tree
);
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.
155 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
156 tree tinfo_var_id; */
158 tree cp_global_trees
[CPTI_MAX
];
160 /* Indicates that there is a type value in some namespace, although
161 that is not necessarily in scope at the moment. */
163 tree global_type_node
;
165 /* The node that holds the "name" of the global scope. */
166 tree global_scope_name
;
168 #define local_names cp_function_chain->x_local_names
170 /* A list of objects which have constructors or destructors
171 which reside in the global scope. The decl is stored in
172 the TREE_VALUE slot and the initializer is stored
173 in the TREE_PURPOSE slot. */
174 tree static_aggregates
;
176 /* Like static_aggregates, but for thread_local variables. */
181 /* A node for the integer constant 2. */
183 tree integer_two_node
;
185 /* Used only for jumps to as-yet undefined labels, since jumps to
186 defined labels can have their validity checked immediately. */
188 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
189 struct named_label_use_entry
*next
;
190 /* The binding level to which this entry is *currently* attached.
191 This is initially the binding level in which the goto appeared,
192 but is modified as scopes are closed. */
193 cp_binding_level
*binding_level
;
194 /* The head of the names list that was current when the goto appeared,
195 or the inner scope popped. These are the decls that will *not* be
196 skipped when jumping to the label. */
198 /* The location of the goto, for error reporting. */
199 location_t o_goto_locus
;
200 /* True if an OpenMP structured block scope has been closed since
201 the goto appeared. This means that the branch from the label will
202 illegally exit an OpenMP scope. */
206 /* A list of all LABEL_DECLs in the function that have names. Here so
207 we can clear out their names' definitions at the end of the
208 function, and so we can check the validity of jumps to these labels. */
210 struct GTY((for_user
)) named_label_entry
{
211 /* The decl itself. */
214 /* The binding level to which the label is *currently* attached.
215 This is initially set to the binding level in which the label
216 is defined, but is modified as scopes are closed. */
217 cp_binding_level
*binding_level
;
218 /* The head of the names list that was current when the label was
219 defined, or the inner scope popped. These are the decls that will
220 be skipped when jumping to the label. */
222 /* A vector of all decls from all binding levels that would be
223 crossed by a backward branch to the label. */
224 vec
<tree
, va_gc
> *bad_decls
;
226 /* A list of uses of the label, before the label is defined. */
227 struct named_label_use_entry
*uses
;
229 /* The following bits are set after the label is defined, and are
230 updated as scopes are popped. They indicate that a backward jump
231 to the label will illegally enter a scope of the given flavor. */
237 #define named_labels cp_function_chain->x_named_labels
239 /* The number of function bodies which we are currently processing.
240 (Zero if we are at namespace scope, one inside the body of a
241 function, two inside the body of a function in a local class, etc.) */
244 /* To avoid unwanted recursion, finish_function defers all mark_used calls
245 encountered during its execution until it finishes. */
246 bool defer_mark_used_calls
;
247 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
249 /* States indicating how grokdeclarator() should handle declspecs marked
250 with __attribute__((deprecated)). An object declared as
251 __attribute__((deprecated)) suppresses warnings of uses of other
253 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
256 /* A list of VAR_DECLs whose type was incomplete at the time the
257 variable was declared. */
259 typedef struct GTY(()) incomplete_var_d
{
261 tree incomplete_type
;
265 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
267 /* Returns the kind of template specialization we are currently
268 processing, given that it's declaration contained N_CLASS_SCOPES
269 explicit scope qualifications. */
272 current_tmpl_spec_kind (int n_class_scopes
)
274 int n_template_parm_scopes
= 0;
275 int seen_specialization_p
= 0;
276 int innermost_specialization_p
= 0;
279 /* Scan through the template parameter scopes. */
280 for (b
= current_binding_level
;
281 b
->kind
== sk_template_parms
;
284 /* If we see a specialization scope inside a parameter scope,
285 then something is wrong. That corresponds to a declaration
288 template <class T> template <> ...
290 which is always invalid since [temp.expl.spec] forbids the
291 specialization of a class member template if the enclosing
292 class templates are not explicitly specialized as well. */
293 if (b
->explicit_spec_p
)
295 if (n_template_parm_scopes
== 0)
296 innermost_specialization_p
= 1;
298 seen_specialization_p
= 1;
300 else if (seen_specialization_p
== 1)
301 return tsk_invalid_member_spec
;
303 ++n_template_parm_scopes
;
306 /* Handle explicit instantiations. */
307 if (processing_explicit_instantiation
)
309 if (n_template_parm_scopes
!= 0)
310 /* We've seen a template parameter list during an explicit
311 instantiation. For example:
313 template <class T> template void f(int);
315 This is erroneous. */
316 return tsk_invalid_expl_inst
;
318 return tsk_expl_inst
;
321 if (n_template_parm_scopes
< n_class_scopes
)
322 /* We've not seen enough template headers to match all the
323 specialized classes present. For example:
325 template <class T> void R<T>::S<T>::f(int);
327 This is invalid; there needs to be one set of template
328 parameters for each class. */
329 return tsk_insufficient_parms
;
330 else if (n_template_parm_scopes
== n_class_scopes
)
331 /* We're processing a non-template declaration (even though it may
332 be a member of a template class.) For example:
334 template <class T> void S<T>::f(int);
336 The `class T' matches the `S<T>', leaving no template headers
337 corresponding to the `f'. */
339 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
340 /* We've got too many template headers. For example:
342 template <> template <class T> void f (T);
344 There need to be more enclosing classes. */
345 return tsk_excessive_parms
;
347 /* This must be a template. It's of the form:
349 template <class T> template <class U> void S<T>::f(U);
351 This is a specialization if the innermost level was a
352 specialization; otherwise it's just a definition of the
354 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
357 /* Exit the current scope. */
365 /* When a label goes out of scope, check to see if that label was used
366 in a valid manner, and issue any appropriate warnings or errors. */
369 pop_label (tree label
, tree old_value
)
371 if (!processing_template_decl
)
373 if (DECL_INITIAL (label
) == NULL_TREE
)
377 error ("label %q+D used but not defined", label
);
378 location
= input_location
;
379 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
380 /* Avoid crashing later. */
381 define_label (location
, DECL_NAME (label
));
384 warn_for_unused_label (label
);
387 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
390 /* At the end of a function, all labels declared within the function
391 go out of scope. BLOCK is the top-level block for the
395 pop_labels_1 (named_label_entry
**slot
, tree block
)
397 struct named_label_entry
*ent
= *slot
;
399 pop_label (ent
->label_decl
, NULL_TREE
);
401 /* Put the labels into the "variables" of the top-level block,
402 so debugger can see them. */
403 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
404 BLOCK_VARS (block
) = ent
->label_decl
;
406 named_labels
->clear_slot (slot
);
412 pop_labels (tree block
)
416 named_labels
->traverse
<tree
, pop_labels_1
> (block
);
421 /* At the end of a block with local labels, restore the outer definition. */
424 pop_local_label (tree label
, tree old_value
)
426 struct named_label_entry dummy
;
428 pop_label (label
, old_value
);
430 dummy
.label_decl
= label
;
431 named_label_entry
**slot
= named_labels
->find_slot (&dummy
, NO_INSERT
);
432 named_labels
->clear_slot (slot
);
435 /* The following two routines are used to interface to Objective-C++.
436 The binding level is purposely treated as an opaque type. */
439 objc_get_current_scope (void)
441 return current_binding_level
;
444 /* The following routine is used by the NeXT-style SJLJ exceptions;
445 variables get marked 'volatile' so as to not be clobbered by
446 _setjmp()/_longjmp() calls. All variables in the current scope,
447 as well as parent scopes up to (but not including) ENCLOSING_BLK
448 shall be thusly marked. */
451 objc_mark_locals_volatile (void *enclosing_blk
)
453 cp_binding_level
*scope
;
455 for (scope
= current_binding_level
;
456 scope
&& scope
!= enclosing_blk
;
457 scope
= scope
->level_chain
)
461 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
462 objc_volatilize_decl (decl
);
464 /* Do not climb up past the current function. */
465 if (scope
->kind
== sk_function_parms
)
470 /* Update data for defined and undefined labels when leaving a scope. */
473 poplevel_named_label_1 (named_label_entry
**slot
, cp_binding_level
*bl
)
475 named_label_entry
*ent
= *slot
;
476 cp_binding_level
*obl
= bl
->level_chain
;
478 if (ent
->binding_level
== bl
)
482 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
483 TREE_LISTs representing OVERLOADs, so be careful. */
484 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
486 : TREE_CHAIN (decl
)))
487 if (decl_jump_unsafe (decl
))
488 vec_safe_push (ent
->bad_decls
, decl
);
490 ent
->binding_level
= obl
;
491 ent
->names_in_scope
= obl
->names
;
495 ent
->in_try_scope
= true;
498 ent
->in_catch_scope
= true;
501 ent
->in_omp_scope
= true;
509 struct named_label_use_entry
*use
;
511 for (use
= ent
->uses
; use
; use
= use
->next
)
512 if (use
->binding_level
== bl
)
514 use
->binding_level
= obl
;
515 use
->names_in_scope
= obl
->names
;
516 if (bl
->kind
== sk_omp
)
517 use
->in_omp_scope
= true;
524 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
525 when errors were reported, except for -Werror-unused-but-set-*. */
526 static int unused_but_set_errorcount
;
528 /* Exit a binding level.
529 Pop the level off, and restore the state of the identifier-decl mappings
530 that were in effect when this level was entered.
532 If KEEP == 1, this level had explicit declarations, so
533 and create a "block" (a BLOCK node) for the level
534 to record its declarations and subblocks for symbol table output.
536 If FUNCTIONBODY is nonzero, this level is the body of a function,
537 so create a block as if KEEP were set and also clear out all
540 If REVERSE is nonzero, reverse the order of decls before putting
541 them into the BLOCK. */
544 poplevel (int keep
, int reverse
, int functionbody
)
547 /* The chain of decls was accumulated in reverse order.
548 Put it into forward order, just for cleanliness. */
553 int leaving_for_scope
;
556 cp_label_binding
*label_bind
;
558 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
563 gcc_assert (current_binding_level
->kind
!= sk_class
);
565 if (current_binding_level
->kind
== sk_cleanup
)
567 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
569 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
571 /* We used to use KEEP == 2 to indicate that the new block should go
572 at the beginning of the list of blocks at this binding level,
573 rather than the end. This hack is no longer used. */
574 gcc_assert (keep
== 0 || keep
== 1);
576 if (current_binding_level
->keep
)
579 /* Any uses of undefined labels, and any defined labels, now operate
580 under constraints of next binding contour. */
581 if (cfun
&& !functionbody
&& named_labels
)
582 named_labels
->traverse
<cp_binding_level
*, poplevel_named_label_1
>
583 (current_binding_level
);
585 /* Get the decls in the order they were written.
586 Usually current_binding_level->names is in reverse order.
587 But parameter decls were previously put in forward order. */
590 current_binding_level
->names
591 = decls
= nreverse (current_binding_level
->names
);
593 decls
= current_binding_level
->names
;
595 /* If there were any declarations or structure tags in that level,
596 or if this level is a function body,
597 create a BLOCK to record them for the life of this function. */
599 /* Avoid function body block if possible. */
600 if (functionbody
&& subblocks
&& BLOCK_CHAIN (subblocks
) == NULL_TREE
)
602 else if (keep
== 1 || functionbody
)
603 block
= make_node (BLOCK
);
604 if (block
!= NULL_TREE
)
606 BLOCK_VARS (block
) = decls
;
607 BLOCK_SUBBLOCKS (block
) = subblocks
;
610 /* In each subblock, record that this is its superior. */
612 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
613 BLOCK_SUPERCONTEXT (link
) = block
;
615 /* We still support the old for-scope rules, whereby the variables
616 in a for-init statement were in scope after the for-statement
617 ended. We only use the new rules if flag_new_for_scope is
620 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
622 /* Before we remove the declarations first check for unused variables. */
623 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
624 && current_binding_level
->kind
!= sk_template_parms
625 && !processing_template_decl
)
626 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
628 /* There are cases where D itself is a TREE_LIST. See in
629 push_local_binding where the list of decls returned by
630 getdecls is built. */
631 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
632 tree type
= TREE_TYPE (decl
);
634 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
635 && ! DECL_IN_SYSTEM_HEADER (decl
)
636 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
637 && type
!= error_mark_node
638 && (!CLASS_TYPE_P (type
)
639 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
640 || lookup_attribute ("warn_unused",
641 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
643 if (! TREE_USED (decl
))
644 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
645 else if (DECL_CONTEXT (decl
) == current_function_decl
646 // For -Wunused-but-set-variable leave references alone.
647 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
648 && errorcount
== unused_but_set_errorcount
)
650 warning (OPT_Wunused_but_set_variable
,
651 "variable %q+D set but not used", decl
);
652 unused_but_set_errorcount
= errorcount
;
657 /* Remove declarations for all the DECLs in this level. */
658 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
660 if (leaving_for_scope
&& VAR_P (link
)
661 /* It's hard to make this ARM compatibility hack play nicely with
662 lambdas, and it really isn't necessary in C++11 mode. */
663 && cxx_dialect
< cxx11
666 tree name
= DECL_NAME (link
);
670 ob
= outer_binding (name
,
671 IDENTIFIER_BINDING (name
),
674 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
676 ns_binding
= NULL_TREE
;
678 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
679 /* We have something like:
684 and we are leaving the `for' scope. There's no reason to
685 keep the binding of the inner `i' in this case. */
686 pop_binding (name
, link
);
687 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
688 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
689 /* Here, we have something like:
697 We must pop the for-scope binding so we know what's a
698 type and what isn't. */
699 pop_binding (name
, link
);
702 /* Mark this VAR_DECL as dead so that we can tell we left it
703 there only for backward compatibility. */
704 DECL_DEAD_FOR_LOCAL (link
) = 1;
706 /* Keep track of what should have happened when we
707 popped the binding. */
710 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
711 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
714 /* Add it to the list of dead variables in the next
715 outermost binding to that we can remove these when we
716 leave that binding. */
718 current_binding_level
->level_chain
->dead_vars_from_for
,
721 /* Although we don't pop the cxx_binding, we do clear
722 its SCOPE since the scope is going away now. */
723 IDENTIFIER_BINDING (name
)->scope
724 = current_binding_level
->level_chain
;
731 /* Remove the binding. */
734 if (TREE_CODE (decl
) == TREE_LIST
)
735 decl
= TREE_VALUE (decl
);
738 if (TREE_CODE (name
) == OVERLOAD
)
739 name
= OVL_FUNCTION (name
);
741 gcc_assert (DECL_P (name
));
742 pop_binding (DECL_NAME (name
), decl
);
746 /* Remove declarations for any `for' variables from inner scopes
747 that we kept around. */
748 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
750 pop_binding (DECL_NAME (decl
), decl
);
752 /* Restore the IDENTIFIER_TYPE_VALUEs. */
753 for (link
= current_binding_level
->type_shadowed
;
754 link
; link
= TREE_CHAIN (link
))
755 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
757 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
758 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
760 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
762 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
763 list if a `using' declaration put them there. The debugging
764 back ends won't understand OVERLOAD, so we remove them here.
765 Because the BLOCK_VARS are (temporarily) shared with
766 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
767 popped all the bindings. */
772 for (d
= &BLOCK_VARS (block
); *d
; )
774 if (TREE_CODE (*d
) == TREE_LIST
)
775 *d
= TREE_CHAIN (*d
);
777 d
= &DECL_CHAIN (*d
);
781 /* If the level being exited is the top level of a function,
782 check over all the labels. */
787 /* Since this is the top level block of a function, the vars are
788 the function's parameters. Don't leave them in the BLOCK
789 because they are found in the FUNCTION_DECL instead. */
790 BLOCK_VARS (block
) = 0;
794 pop_labels (subblocks
);
797 kind
= current_binding_level
->kind
;
798 if (kind
== sk_cleanup
)
802 /* If this is a temporary binding created for a cleanup, then we'll
803 have pushed a statement list level. Pop that, create a new
804 BIND_EXPR for the block, and insert it into the stream. */
805 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
806 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
813 /* The current function is being defined, so its DECL_INITIAL
814 should be error_mark_node. */
815 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
816 DECL_INITIAL (current_function_decl
) = block
? block
: subblocks
;
819 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
821 if (BLOCK_SUBBLOCKS (subblocks
))
822 BLOCK_OUTER_CURLY_BRACE_P (BLOCK_SUBBLOCKS (subblocks
)) = 1;
825 BLOCK_OUTER_CURLY_BRACE_P (subblocks
) = 1;
829 current_binding_level
->blocks
830 = block_chainon (current_binding_level
->blocks
, block
);
832 /* If we did not make a block for the level just exited,
833 any blocks made for inner levels
834 (since they cannot be recorded as subblocks in that level)
835 must be carried forward so they will later become subblocks
836 of something else. */
838 current_binding_level
->blocks
839 = block_chainon (current_binding_level
->blocks
, subblocks
);
841 /* Each and every BLOCK node created here in `poplevel' is important
842 (e.g. for proper debugging information) so if we created one
843 earlier, mark it as "used". */
845 TREE_USED (block
) = 1;
847 /* All temporary bindings created for cleanups are popped silently. */
848 if (kind
== sk_cleanup
)
851 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
855 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
856 itself, calling F for each. The DATA is passed to F as well. */
859 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
862 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
864 result
|= (*f
) (name_space
, data
);
866 for (; current
; current
= DECL_CHAIN (current
))
867 result
|= walk_namespaces_r (current
, f
, data
);
872 /* Walk all the namespaces, calling F for each. The DATA is passed to
876 walk_namespaces (walk_namespaces_fn f
, void* data
)
878 return walk_namespaces_r (global_namespace
, f
, data
);
881 /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
884 wrapup_globals_for_namespace (tree name_space
, void* data ATTRIBUTE_UNUSED
)
886 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
887 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
888 tree
*vec
= statics
->address ();
889 int len
= statics
->length ();
891 /* Write out any globals that need to be output. */
892 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 cgraph_node::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 (DECL_SOURCE_LOCATION (newdecl
),
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 (! DECL_IS_BUILTIN (old_decl
)
1193 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1196 = "declaration of %q+F has a different exception specifier";
1197 bool complained
= true;
1198 if (! DECL_IN_SYSTEM_HEADER (old_decl
))
1199 error (msg
, new_decl
);
1201 complained
= pedwarn (0, OPT_Wsystem_headers
, msg
, new_decl
);
1203 inform (0, "from previous declaration %q+F", old_decl
);
1207 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1208 Otherwise issue diagnostics. */
1211 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1213 old_decl
= STRIP_TEMPLATE (old_decl
);
1214 new_decl
= STRIP_TEMPLATE (new_decl
);
1215 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1216 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1218 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1219 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1221 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1223 if (DECL_BUILT_IN (old_decl
))
1225 /* Hide a built-in declaration. */
1226 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1227 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1230 /* 7.1.5 [dcl.constexpr]
1231 Note: An explicit specialization can differ from the template
1232 declaration with respect to the constexpr specifier. */
1233 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1234 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1237 error ("redeclaration %q+D differs in %<constexpr%>", new_decl
);
1238 error ("from previous declaration %q+D", old_decl
);
1244 /* DECL is a redeclaration of a function or function template. If
1245 it does have default arguments issue a diagnostic. Note: this
1246 function is used to enforce the requirements in C++11 8.3.6 about
1247 no default arguments in redeclarations. */
1250 check_redeclaration_no_default_args (tree decl
)
1252 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1254 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1255 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1256 if (TREE_PURPOSE (t
))
1258 permerror (input_location
,
1259 "redeclaration of %q+#D may not have default "
1265 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1266 && lookup_attribute ("gnu_inline", \
1267 DECL_ATTRIBUTES (fn)))
1269 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1270 If the redeclaration is invalid, a diagnostic is issued, and the
1271 error_mark_node is returned. Otherwise, OLDDECL is returned.
1273 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1276 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1279 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1281 unsigned olddecl_uid
= DECL_UID (olddecl
);
1282 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1283 int new_defines_function
= 0;
1284 tree new_template_info
;
1286 if (newdecl
== olddecl
)
1289 types_match
= decls_match (newdecl
, olddecl
);
1291 /* If either the type of the new decl or the type of the old decl is an
1292 error_mark_node, then that implies that we have already issued an
1293 error (earlier) for some bogus type specification, and in that case,
1294 it is rather pointless to harass the user with yet more error message
1295 about the same declaration, so just pretend the types match here. */
1296 if (TREE_TYPE (newdecl
) == error_mark_node
1297 || TREE_TYPE (olddecl
) == error_mark_node
)
1298 return error_mark_node
;
1300 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1301 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1303 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1304 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1305 && check_raw_literal_operator (olddecl
))
1306 error ("literal operator template %q+D conflicts with"
1307 " raw literal operator %qD", newdecl
, olddecl
);
1308 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1309 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1310 && check_raw_literal_operator (newdecl
))
1311 error ("raw literal operator %q+D conflicts with"
1312 " literal operator template %qD", newdecl
, olddecl
);
1315 if (DECL_P (olddecl
)
1316 && TREE_CODE (newdecl
) == FUNCTION_DECL
1317 && TREE_CODE (olddecl
) == FUNCTION_DECL
1318 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1320 if (DECL_DECLARED_INLINE_P (newdecl
)
1321 && DECL_UNINLINABLE (newdecl
)
1322 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1323 /* Already warned elsewhere. */;
1324 else if (DECL_DECLARED_INLINE_P (olddecl
)
1325 && DECL_UNINLINABLE (olddecl
)
1326 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1327 /* Already warned. */;
1328 else if (DECL_DECLARED_INLINE_P (newdecl
)
1329 && DECL_UNINLINABLE (olddecl
)
1330 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1332 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1334 inform (DECL_SOURCE_LOCATION (olddecl
),
1335 "previous declaration of %qD with attribute noinline",
1338 else if (DECL_DECLARED_INLINE_P (olddecl
)
1339 && DECL_UNINLINABLE (newdecl
)
1340 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1342 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1343 "attribute noinline", newdecl
))
1344 inform (DECL_SOURCE_LOCATION (olddecl
),
1345 "previous declaration of %qD was inline",
1350 /* Check for redeclaration and other discrepancies. */
1351 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1352 && DECL_ARTIFICIAL (olddecl
))
1354 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1355 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1357 /* Avoid warnings redeclaring built-ins which have not been
1358 explicitly declared. */
1359 if (DECL_ANTICIPATED (olddecl
))
1362 /* If you declare a built-in or predefined function name as static,
1363 the old definition is overridden, but optionally warn this was a
1364 bad choice of name. */
1365 if (! TREE_PUBLIC (newdecl
))
1367 warning (OPT_Wshadow
,
1368 DECL_BUILT_IN (olddecl
)
1369 ? G_("shadowing built-in function %q#D")
1370 : G_("shadowing library function %q#D"), olddecl
);
1371 /* Discard the old built-in function. */
1374 /* If the built-in is not ansi, then programs can override
1375 it even globally without an error. */
1376 else if (! DECL_BUILT_IN (olddecl
))
1377 warning (0, "library function %q#D redeclared as non-function %q+#D",
1380 error ("declaration of %q+#D conflicts with built-in "
1381 "declaration %q#D", newdecl
, olddecl
);
1384 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1386 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1387 error_at (DECL_SOURCE_LOCATION (newdecl
),
1388 "redeclaration of %<pragma omp declare reduction%>");
1389 inform (DECL_SOURCE_LOCATION (olddecl
),
1390 "previous %<pragma omp declare reduction%> declaration");
1391 return error_mark_node
;
1393 else if (!types_match
)
1395 /* Avoid warnings redeclaring built-ins which have not been
1396 explicitly declared. */
1397 if (DECL_ANTICIPATED (olddecl
))
1399 /* Deal with fileptr_type_node. FILE type is not known
1400 at the time we create the builtins. */
1403 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1404 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1406 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1409 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1411 tree t
= TREE_VALUE (t1
);
1414 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1415 == get_identifier ("FILE")
1416 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1418 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1420 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1421 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1422 types_match
= decls_match (newdecl
, olddecl
);
1424 return duplicate_decls (newdecl
, olddecl
,
1426 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1429 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1432 else if ((DECL_EXTERN_C_P (newdecl
)
1433 && DECL_EXTERN_C_P (olddecl
))
1434 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1435 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1437 /* A near match; override the builtin. */
1439 if (TREE_PUBLIC (newdecl
))
1440 warning (0, "new declaration %q+#D ambiguates built-in "
1441 "declaration %q#D", newdecl
, olddecl
);
1443 warning (OPT_Wshadow
,
1444 DECL_BUILT_IN (olddecl
)
1445 ? G_("shadowing built-in function %q#D")
1446 : G_("shadowing library function %q#D"), olddecl
);
1449 /* Discard the old built-in function. */
1452 /* Replace the old RTL to avoid problems with inlining. */
1453 COPY_DECL_RTL (newdecl
, olddecl
);
1455 /* Even if the types match, prefer the new declarations type for
1456 built-ins which have not been explicitly declared, for
1457 exception lists, etc... */
1458 else if (DECL_IS_BUILTIN (olddecl
))
1460 tree type
= TREE_TYPE (newdecl
);
1461 tree attribs
= (*targetm
.merge_type_attributes
)
1462 (TREE_TYPE (olddecl
), type
);
1464 type
= cp_build_type_attribute_variant (type
, attribs
);
1465 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1468 /* If a function is explicitly declared "throw ()", propagate that to
1469 the corresponding builtin. */
1470 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1471 && DECL_ANTICIPATED (olddecl
)
1472 && TREE_NOTHROW (newdecl
)
1473 && !TREE_NOTHROW (olddecl
))
1475 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1476 tree tmpdecl
= builtin_decl_explicit (fncode
);
1477 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1478 TREE_NOTHROW (tmpdecl
) = 1;
1481 /* Whether or not the builtin can throw exceptions has no
1482 bearing on this declarator. */
1483 TREE_NOTHROW (olddecl
) = 0;
1485 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1487 /* If a builtin function is redeclared as `static', merge
1488 the declarations, but make the original one static. */
1489 DECL_THIS_STATIC (olddecl
) = 1;
1490 TREE_PUBLIC (olddecl
) = 0;
1492 /* Make the old declaration consistent with the new one so
1493 that all remnants of the builtin-ness of this function
1494 will be banished. */
1495 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1496 COPY_DECL_RTL (newdecl
, olddecl
);
1499 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1501 /* C++ Standard, 3.3, clause 4:
1502 "[Note: a namespace name or a class template name must be unique
1503 in its declarative region (7.3.2, clause 14). ]" */
1504 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1505 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1506 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1507 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1508 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1509 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1511 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1512 && TREE_CODE (newdecl
) != TYPE_DECL
)
1513 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1514 && TREE_CODE (olddecl
) != TYPE_DECL
))
1516 /* We do nothing special here, because C++ does such nasty
1517 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1518 get shadowed, and know that if we need to find a TYPE_DECL
1519 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1520 slot of the identifier. */
1524 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1525 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1526 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1527 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1531 error ("%q#D redeclared as different kind of symbol", newdecl
);
1532 if (TREE_CODE (olddecl
) == TREE_LIST
)
1533 olddecl
= TREE_VALUE (olddecl
);
1534 inform (DECL_SOURCE_LOCATION (olddecl
),
1535 "previous declaration %q#D", olddecl
);
1537 return error_mark_node
;
1539 else if (!types_match
)
1541 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1542 /* These are certainly not duplicate declarations; they're
1543 from different scopes. */
1546 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1548 /* The name of a class template may not be declared to refer to
1549 any other template, class, function, object, namespace, value,
1550 or type in the same scope. */
1551 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1552 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1554 error ("conflicting declaration of template %q+#D", newdecl
);
1555 inform (DECL_SOURCE_LOCATION (olddecl
),
1556 "previous declaration %q#D", olddecl
);
1557 return error_mark_node
;
1559 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1560 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1561 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1562 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1563 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1564 DECL_TEMPLATE_PARMS (olddecl
))
1565 /* Template functions can be disambiguated by
1567 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1568 TREE_TYPE (TREE_TYPE (olddecl
))))
1570 error ("ambiguating new declaration %q+#D", newdecl
);
1571 inform (DECL_SOURCE_LOCATION (olddecl
),
1572 "old declaration %q#D", olddecl
);
1576 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1578 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1580 error ("conflicting declaration of C function %q+#D",
1582 inform (DECL_SOURCE_LOCATION (olddecl
),
1583 "previous declaration %q#D", olddecl
);
1586 /* For function versions, params and types match, but they
1587 are not ambiguous. */
1588 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1589 && !DECL_FUNCTION_VERSIONED (olddecl
))
1590 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1591 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1593 error ("ambiguating new declaration of %q+#D", newdecl
);
1594 inform (DECL_SOURCE_LOCATION (olddecl
),
1595 "old declaration %q#D", olddecl
);
1596 return error_mark_node
;
1603 error ("conflicting declaration %q+#D", newdecl
);
1604 inform (DECL_SOURCE_LOCATION (olddecl
),
1605 "previous declaration as %q#D", olddecl
);
1606 return error_mark_node
;
1609 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1610 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1611 && (!DECL_TEMPLATE_INFO (newdecl
)
1612 || (DECL_TI_TEMPLATE (newdecl
)
1613 != DECL_TI_TEMPLATE (olddecl
))))
1614 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1615 && (!DECL_TEMPLATE_INFO (olddecl
)
1616 || (DECL_TI_TEMPLATE (olddecl
)
1617 != DECL_TI_TEMPLATE (newdecl
))))))
1618 /* It's OK to have a template specialization and a non-template
1619 with the same type, or to have specializations of two
1620 different templates with the same type. Note that if one is a
1621 specialization, and the other is an instantiation of the same
1622 template, that we do not exit at this point. That situation
1623 can occur if we instantiate a template class, and then
1624 specialize one of its methods. This situation is valid, but
1625 the declarations must be merged in the usual way. */
1627 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1628 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1629 && !DECL_USE_TEMPLATE (newdecl
))
1630 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1631 && !DECL_USE_TEMPLATE (olddecl
))))
1632 /* One of the declarations is a template instantiation, and the
1633 other is not a template at all. That's OK. */
1635 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1637 /* In [namespace.alias] we have:
1639 In a declarative region, a namespace-alias-definition can be
1640 used to redefine a namespace-alias declared in that declarative
1641 region to refer only to the namespace to which it already
1644 Therefore, if we encounter a second alias directive for the same
1645 alias, we can just ignore the second directive. */
1646 if (DECL_NAMESPACE_ALIAS (newdecl
)
1647 && (DECL_NAMESPACE_ALIAS (newdecl
)
1648 == DECL_NAMESPACE_ALIAS (olddecl
)))
1650 /* [namespace.alias]
1652 A namespace-name or namespace-alias shall not be declared as
1653 the name of any other entity in the same declarative region.
1654 A namespace-name defined at global scope shall not be
1655 declared as the name of any other entity in any global scope
1657 error ("conflicting declaration of namespace %q+D", newdecl
);
1658 inform (DECL_SOURCE_LOCATION (olddecl
),
1659 "previous declaration of namespace %qD here", olddecl
);
1660 return error_mark_node
;
1664 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1667 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1668 if (DECL_NAME (olddecl
) != NULL_TREE
)
1669 inform (input_location
,
1670 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1671 ? G_("%q+#D previously defined here")
1672 : G_("%q+#D previously declared here"), olddecl
);
1673 return error_mark_node
;
1675 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1676 && DECL_INITIAL (olddecl
) != NULL_TREE
1677 && !prototype_p (TREE_TYPE (olddecl
))
1678 && prototype_p (TREE_TYPE (newdecl
)))
1680 /* Prototype decl follows defn w/o prototype. */
1681 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1682 "prototype specified for %q+#D", newdecl
))
1683 inform (DECL_SOURCE_LOCATION (olddecl
),
1684 "previous non-prototype definition here");
1686 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1687 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1690 If two declarations of the same function or object
1691 specify different linkage-specifications ..., the program
1692 is ill-formed.... Except for functions with C++ linkage,
1693 a function declaration without a linkage specification
1694 shall not precede the first linkage specification for
1695 that function. A function can be declared without a
1696 linkage specification after an explicit linkage
1697 specification has been seen; the linkage explicitly
1698 specified in the earlier declaration is not affected by
1699 such a function declaration.
1701 DR 563 raises the question why the restrictions on
1702 functions should not also apply to objects. Older
1703 versions of G++ silently ignore the linkage-specification
1711 which is clearly wrong. Therefore, we now treat objects
1713 if (current_lang_depth () == 0)
1715 /* There is no explicit linkage-specification, so we use
1716 the linkage from the previous declaration. */
1717 if (!DECL_LANG_SPECIFIC (newdecl
))
1718 retrofit_lang_decl (newdecl
);
1719 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1723 error ("conflicting declaration of %q+#D with %qL linkage",
1724 newdecl
, DECL_LANGUAGE (newdecl
));
1725 inform (DECL_SOURCE_LOCATION (olddecl
),
1726 "previous declaration with %qL linkage",
1727 DECL_LANGUAGE (olddecl
));
1731 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1733 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1735 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1736 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1737 && (/* grokfndecl passes member function templates too
1738 as FUNCTION_DECLs. */
1739 DECL_TEMPLATE_INFO (olddecl
)
1741 Default arguments for a member function of a class
1742 template shall be specified on the initial declaration
1743 of the member function within the class template. */
1744 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1745 check_redeclaration_no_default_args (newdecl
);
1748 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1749 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1752 for (; t1
&& t1
!= void_list_node
;
1753 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1754 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1756 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1759 if (permerror (input_location
,
1760 "default argument given for parameter "
1761 "%d of %q#D", i
, newdecl
))
1762 inform (DECL_SOURCE_LOCATION (olddecl
),
1763 "previous specification in %q#D here",
1768 error ("default argument given for parameter %d "
1769 "of %q#D", i
, newdecl
);
1770 inform (DECL_SOURCE_LOCATION (olddecl
),
1771 "previous specification in %q#D here",
1779 /* Do not merge an implicit typedef with an explicit one. In:
1783 typedef class A A __attribute__ ((foo));
1785 the attribute should apply only to the typedef. */
1786 if (TREE_CODE (olddecl
) == TYPE_DECL
1787 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1788 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1791 /* If new decl is `static' and an `extern' was seen previously,
1793 warn_extern_redeclared_static (newdecl
, olddecl
);
1795 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1796 return error_mark_node
;
1798 /* We have committed to returning 1 at this point. */
1799 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1801 /* Now that functions must hold information normally held
1802 by field decls, there is extra work to do so that
1803 declaration information does not get destroyed during
1805 if (DECL_VINDEX (olddecl
))
1806 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1807 if (DECL_CONTEXT (olddecl
))
1808 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1809 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1810 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1811 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1812 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1813 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1814 DECL_FINAL_P (newdecl
) |= DECL_FINAL_P (olddecl
);
1815 DECL_OVERRIDE_P (newdecl
) |= DECL_OVERRIDE_P (olddecl
);
1816 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1817 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1818 SET_OVERLOADED_OPERATOR_CODE
1819 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1820 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1822 /* Optionally warn about more than one declaration for the same
1823 name, but don't warn about a function declaration followed by a
1825 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1826 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1827 /* Don't warn about extern decl followed by definition. */
1828 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1829 /* Don't warn about friends, let add_friend take care of it. */
1830 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1831 /* Don't warn about declaration followed by specialization. */
1832 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1833 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1835 if (warning (OPT_Wredundant_decls
,
1836 "redundant redeclaration of %q+D in same scope",
1838 inform (DECL_SOURCE_LOCATION (olddecl
),
1839 "previous declaration of %qD", olddecl
);
1842 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1843 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1845 if (DECL_DELETED_FN (newdecl
))
1847 error ("deleted definition of %q+D", newdecl
);
1848 inform (DECL_SOURCE_LOCATION (olddecl
),
1849 "previous declaration of %qD", olddecl
);
1851 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1855 /* Deal with C++: must preserve virtual function table size. */
1856 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1858 tree newtype
= TREE_TYPE (newdecl
);
1859 tree oldtype
= TREE_TYPE (olddecl
);
1861 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1862 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1863 CLASSTYPE_FRIEND_CLASSES (newtype
)
1864 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1866 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1869 /* Copy all the DECL_... slots specified in the new decl
1870 except for any that we copy here from the old type. */
1871 DECL_ATTRIBUTES (newdecl
)
1872 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1874 if (DECL_DECLARES_FUNCTION_P (olddecl
) && DECL_DECLARES_FUNCTION_P (newdecl
))
1876 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1877 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1878 && DECL_HIDDEN_FRIEND_P (olddecl
)
1879 && newdecl_is_friend
);
1882 DECL_ANTICIPATED (olddecl
) = 0;
1883 DECL_HIDDEN_FRIEND_P (olddecl
) = 0;
1887 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1891 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1892 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1893 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1894 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1895 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1896 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1898 DECL_ATTRIBUTES (old_result
)
1899 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1901 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1903 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1904 declarations of a function template. */
1905 if (DECL_SOURCE_LOCATION (newdecl
)
1906 != DECL_SOURCE_LOCATION (olddecl
))
1907 check_redeclaration_no_default_args (newdecl
);
1909 check_default_args (newdecl
);
1911 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1912 && DECL_INITIAL (new_result
))
1914 if (DECL_INITIAL (old_result
))
1915 DECL_UNINLINABLE (old_result
) = 1;
1917 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1918 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1919 DECL_NOT_REALLY_EXTERN (old_result
)
1920 = DECL_NOT_REALLY_EXTERN (new_result
);
1921 DECL_INTERFACE_KNOWN (old_result
)
1922 = DECL_INTERFACE_KNOWN (new_result
);
1923 DECL_DECLARED_INLINE_P (old_result
)
1924 = DECL_DECLARED_INLINE_P (new_result
);
1925 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1926 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1931 DECL_DECLARED_INLINE_P (old_result
)
1932 |= DECL_DECLARED_INLINE_P (new_result
);
1933 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1934 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1935 check_redeclaration_exception_specification (newdecl
, olddecl
);
1939 /* If the new declaration is a definition, update the file and
1940 line information on the declaration, and also make
1941 the old declaration the same definition. */
1942 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1944 DECL_SOURCE_LOCATION (olddecl
)
1945 = DECL_SOURCE_LOCATION (old_result
)
1946 = DECL_SOURCE_LOCATION (newdecl
);
1947 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1948 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1951 DECL_ARGUMENTS (old_result
)
1952 = DECL_ARGUMENTS (new_result
);
1953 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1954 parm
= DECL_CHAIN (parm
))
1955 DECL_CONTEXT (parm
) = old_result
;
1964 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1965 check_redeclaration_exception_specification (newdecl
, olddecl
);
1967 /* Automatically handles default parameters. */
1968 tree oldtype
= TREE_TYPE (olddecl
);
1971 /* For typedefs use the old type, as the new type's DECL_NAME points
1972 at newdecl, which will be ggc_freed. */
1973 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1976 /* Merge the data types specified in the two decls. */
1977 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1979 if (VAR_P (newdecl
))
1981 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1982 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1983 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1984 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1985 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1986 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1988 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1989 if (DECL_LANG_SPECIFIC (olddecl
)
1990 && CP_DECL_THREADPRIVATE_P (olddecl
))
1992 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1993 if (!DECL_LANG_SPECIFIC (newdecl
))
1994 retrofit_lang_decl (newdecl
);
1996 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
2000 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
2002 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2003 check_default_args (newdecl
);
2005 /* Lay the type out, unless already done. */
2006 if (! same_type_p (newtype
, oldtype
)
2007 && TREE_TYPE (newdecl
) != error_mark_node
2008 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2009 layout_type (TREE_TYPE (newdecl
));
2011 if ((VAR_P (newdecl
)
2012 || TREE_CODE (newdecl
) == PARM_DECL
2013 || TREE_CODE (newdecl
) == RESULT_DECL
2014 || TREE_CODE (newdecl
) == FIELD_DECL
2015 || TREE_CODE (newdecl
) == TYPE_DECL
)
2016 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2017 layout_decl (newdecl
, 0);
2019 /* Merge the type qualifiers. */
2020 if (TREE_READONLY (newdecl
))
2021 TREE_READONLY (olddecl
) = 1;
2022 if (TREE_THIS_VOLATILE (newdecl
))
2023 TREE_THIS_VOLATILE (olddecl
) = 1;
2024 if (TREE_NOTHROW (newdecl
))
2025 TREE_NOTHROW (olddecl
) = 1;
2027 /* Merge deprecatedness. */
2028 if (TREE_DEPRECATED (newdecl
))
2029 TREE_DEPRECATED (olddecl
) = 1;
2031 /* Preserve function specific target and optimization options */
2032 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2034 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2035 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2036 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2037 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2039 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2040 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2041 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2042 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2045 /* Merge the initialization information. */
2046 if (DECL_INITIAL (newdecl
) == NULL_TREE
2047 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2049 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2050 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2051 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2053 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2054 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2058 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2060 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2061 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2062 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2063 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2064 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2065 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2066 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2067 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2068 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2069 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2070 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2071 /* Keep the old RTL. */
2072 COPY_DECL_RTL (olddecl
, newdecl
);
2074 else if (VAR_P (newdecl
)
2075 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2077 /* Keep the old RTL. We cannot keep the old RTL if the old
2078 declaration was for an incomplete object and the new
2079 declaration is not since many attributes of the RTL will
2081 COPY_DECL_RTL (olddecl
, newdecl
);
2084 /* If cannot merge, then use the new type and qualifiers,
2085 and don't preserve the old rtl. */
2088 /* Clean out any memory we had of the old declaration. */
2089 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2091 TREE_VALUE (oldstatic
) = error_mark_node
;
2093 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2094 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2095 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2096 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2099 /* Merge the storage class information. */
2100 merge_weak (newdecl
, olddecl
);
2102 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2103 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2104 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2105 if (! DECL_EXTERNAL (olddecl
))
2106 DECL_EXTERNAL (newdecl
) = 0;
2107 if (! DECL_COMDAT (olddecl
))
2108 DECL_COMDAT (newdecl
) = 0;
2110 new_template_info
= NULL_TREE
;
2111 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2113 bool new_redefines_gnu_inline
= false;
2115 if (new_defines_function
2116 && ((DECL_INTERFACE_KNOWN (olddecl
)
2117 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2118 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2119 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2120 == FUNCTION_DECL
))))
2124 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2125 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2127 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2130 if (!new_redefines_gnu_inline
)
2132 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2133 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2134 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2136 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2137 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2138 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2140 /* If the OLDDECL is an instantiation and/or specialization,
2141 then the NEWDECL must be too. But, it may not yet be marked
2142 as such if the caller has created NEWDECL, but has not yet
2143 figured out that it is a redeclaration. */
2144 if (!DECL_USE_TEMPLATE (newdecl
))
2145 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2147 /* Don't really know how much of the language-specific
2148 values we should copy from old to new. */
2149 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2150 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2151 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2152 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2154 if (LANG_DECL_HAS_MIN (newdecl
))
2156 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2157 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2158 if (DECL_TEMPLATE_INFO (newdecl
))
2160 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2161 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2162 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2163 /* Remember the presence of explicit specialization args. */
2164 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2165 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2167 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2169 /* Only functions have these fields. */
2170 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2172 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2173 DECL_BEFRIENDING_CLASSES (newdecl
)
2174 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2175 DECL_BEFRIENDING_CLASSES (olddecl
));
2176 /* DECL_THUNKS is only valid for virtual functions,
2177 otherwise it is a DECL_FRIEND_CONTEXT. */
2178 if (DECL_VIRTUAL_P (newdecl
))
2179 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2181 /* Only variables have this field. */
2182 else if (VAR_P (newdecl
)
2183 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2184 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2187 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2191 /* Merge parameter attributes. */
2192 tree oldarg
, newarg
;
2193 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2194 newarg
= DECL_ARGUMENTS(newdecl
);
2196 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2197 DECL_ATTRIBUTES (newarg
)
2198 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2199 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2202 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2203 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2205 /* If newdecl is not a specialization, then it is not a
2206 template-related function at all. And that means that we
2207 should have exited above, returning 0. */
2208 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2210 if (DECL_ODR_USED (olddecl
))
2211 /* From [temp.expl.spec]:
2213 If a template, a member template or the member of a class
2214 template is explicitly specialized then that
2215 specialization shall be declared before the first use of
2216 that specialization that would cause an implicit
2217 instantiation to take place, in every translation unit in
2218 which such a use occurs. */
2219 error ("explicit specialization of %qD after first use",
2222 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2223 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2224 && DECL_DECLARED_INLINE_P (newdecl
));
2226 /* Don't propagate visibility from the template to the
2227 specialization here. We'll do that in determine_visibility if
2229 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2231 /* [temp.expl.spec/14] We don't inline explicit specialization
2232 just because the primary template says so. */
2234 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2235 the always_inline attribute. */
2236 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2237 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2239 if (DECL_DECLARED_INLINE_P (newdecl
))
2240 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2242 DECL_ATTRIBUTES (newdecl
)
2243 = remove_attribute ("always_inline",
2244 DECL_ATTRIBUTES (newdecl
));
2247 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2249 /* Never inline re-defined extern inline functions.
2250 FIXME: this could be better handled by keeping both
2251 function as separate declarations. */
2252 DECL_UNINLINABLE (newdecl
) = 1;
2256 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2257 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2259 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2261 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2262 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2264 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2265 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2266 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2267 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2270 /* Preserve abstractness on cloned [cd]tors. */
2271 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2273 /* Update newdecl's parms to point at olddecl. */
2274 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2275 parm
= DECL_CHAIN (parm
))
2276 DECL_CONTEXT (parm
) = olddecl
;
2280 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2281 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2282 COPY_DECL_RTL (newdecl
, olddecl
);
2284 if (! types_match
|| new_defines_function
)
2286 /* These need to be copied so that the names are available.
2287 Note that if the types do match, we'll preserve inline
2288 info and other bits, but if not, we won't. */
2289 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2290 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2292 /* If redeclaring a builtin function, it stays built in
2293 if newdecl is a gnu_inline definition, or if newdecl is just
2295 if (DECL_BUILT_IN (olddecl
)
2296 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2298 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2299 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2300 /* If we're keeping the built-in definition, keep the rtl,
2301 regardless of declaration matches. */
2302 COPY_DECL_RTL (olddecl
, newdecl
);
2303 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2305 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2308 /* If a compatible prototype of these builtin functions
2309 is seen, assume the runtime implements it with the
2310 expected semantics. */
2311 case BUILT_IN_STPCPY
:
2312 if (builtin_decl_explicit_p (fncode
))
2313 set_builtin_decl_implicit_p (fncode
, true);
2316 if (builtin_decl_explicit_p (fncode
))
2317 set_builtin_decl_declared_p (fncode
, true);
2322 if (new_defines_function
)
2323 /* If defining a function declared with other language
2324 linkage, use the previously declared language linkage. */
2325 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2326 else if (types_match
)
2328 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2329 /* Don't clear out the arguments if we're just redeclaring a
2331 if (DECL_ARGUMENTS (olddecl
))
2332 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2335 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2336 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2338 /* Now preserve various other info from the definition. */
2339 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2340 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2341 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2342 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2344 /* Warn about conflicting visibility specifications. */
2345 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2346 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2347 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2349 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2350 "%qD: visibility attribute ignored because it "
2351 "conflicts with previous declaration", newdecl
))
2352 inform (DECL_SOURCE_LOCATION (olddecl
),
2353 "previous declaration of %qD", olddecl
);
2355 /* Choose the declaration which specified visibility. */
2356 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2358 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2359 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2361 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2362 so keep this behavior. */
2363 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2365 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2366 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2368 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2369 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2371 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2372 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2374 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2375 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2376 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2378 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2379 with that from NEWDECL below. */
2380 if (DECL_LANG_SPECIFIC (olddecl
))
2382 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2383 != DECL_LANG_SPECIFIC (newdecl
));
2384 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2387 /* Merge the USED information. */
2388 if (TREE_USED (olddecl
))
2389 TREE_USED (newdecl
) = 1;
2390 else if (TREE_USED (newdecl
))
2391 TREE_USED (olddecl
) = 1;
2392 if (VAR_P (newdecl
))
2394 if (DECL_READ_P (olddecl
))
2395 DECL_READ_P (newdecl
) = 1;
2396 else if (DECL_READ_P (newdecl
))
2397 DECL_READ_P (olddecl
) = 1;
2399 if (DECL_PRESERVE_P (olddecl
))
2400 DECL_PRESERVE_P (newdecl
) = 1;
2401 else if (DECL_PRESERVE_P (newdecl
))
2402 DECL_PRESERVE_P (olddecl
) = 1;
2404 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2405 to olddecl and deleted. */
2406 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2407 && DECL_FUNCTION_VERSIONED (olddecl
))
2409 /* Set the flag for newdecl so that it gets copied to olddecl. */
2410 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2411 /* newdecl will be purged after copying to olddecl and is no longer
2413 cgraph_node::delete_function_version (newdecl
);
2416 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2419 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2421 function_size
= sizeof (struct tree_decl_common
);
2423 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2424 (char *) newdecl
+ sizeof (struct tree_common
),
2425 function_size
- sizeof (struct tree_common
));
2427 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2428 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2429 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2431 /* Preserve symtab node mapping. */
2432 olddecl
->decl_with_vis
.symtab_node
= snode
;
2434 if (new_template_info
)
2435 /* If newdecl is a template instantiation, it is possible that
2436 the following sequence of events has occurred:
2438 o A friend function was declared in a class template. The
2439 class template was instantiated.
2441 o The instantiation of the friend declaration was
2442 recorded on the instantiation list, and is newdecl.
2444 o Later, however, instantiate_class_template called pushdecl
2445 on the newdecl to perform name injection. But, pushdecl in
2446 turn called duplicate_decls when it discovered that another
2447 declaration of a global function with the same name already
2450 o Here, in duplicate_decls, we decided to clobber newdecl.
2452 If we're going to do that, we'd better make sure that
2453 olddecl, and not newdecl, is on the list of
2454 instantiations so that if we try to do the instantiation
2455 again we won't get the clobbered declaration. */
2456 reregister_specialization (newdecl
,
2462 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2464 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2465 (char *) newdecl
+ sizeof (struct tree_common
),
2466 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2467 switch (TREE_CODE (newdecl
))
2477 struct symtab_node
*snode
= NULL
;
2480 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
)
2481 || DECL_EXTERNAL (olddecl
)))
2482 snode
= symtab_node::get (olddecl
);
2483 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2484 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2485 size
- sizeof (struct tree_decl_common
)
2486 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2487 if (VAR_P (newdecl
))
2488 olddecl
->decl_with_vis
.symtab_node
= snode
;
2492 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2493 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2494 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2495 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2500 if (VAR_OR_FUNCTION_DECL_P (newdecl
))
2502 if (DECL_EXTERNAL (olddecl
)
2503 || TREE_PUBLIC (olddecl
)
2504 || TREE_STATIC (olddecl
))
2506 /* Merge the section attribute.
2507 We want to issue an error if the sections conflict but that must be
2508 done later in decl_attributes since we are called before attributes
2510 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2511 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2513 if (DECL_ONE_ONLY (newdecl
))
2515 struct symtab_node
*oldsym
, *newsym
;
2516 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2517 oldsym
= cgraph_node::get_create (olddecl
);
2519 oldsym
= varpool_node::get_create (olddecl
);
2520 newsym
= symtab_node::get (newdecl
);
2521 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2526 && DECL_THREAD_LOCAL_P (newdecl
))
2527 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2530 DECL_UID (olddecl
) = olddecl_uid
;
2532 DECL_FRIEND_P (olddecl
) = 1;
2535 DECL_ANTICIPATED (olddecl
) = 1;
2536 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2539 /* NEWDECL contains the merged attribute lists.
2540 Update OLDDECL to be the same. */
2541 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2543 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2544 so that encode_section_info has a chance to look at the new decl
2545 flags and attributes. */
2546 if (DECL_RTL_SET_P (olddecl
)
2547 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2549 && TREE_STATIC (olddecl
))))
2550 make_decl_rtl (olddecl
);
2552 /* The NEWDECL will no longer be needed. Because every out-of-class
2553 declaration of a member results in a call to duplicate_decls,
2554 freeing these nodes represents in a significant savings.
2556 Before releasing the node, be sore to remove function from symbol
2557 table that might have been inserted there to record comdat group.
2558 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2559 structure is shared in between newdecl and oldecl. */
2560 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2561 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2562 if (VAR_OR_FUNCTION_DECL_P (newdecl
))
2564 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2573 /* Return zero if the declaration NEWDECL is valid
2574 when the declaration OLDDECL (assumed to be for the same name)
2575 has already been seen.
2576 Otherwise return an error message format string with a %s
2577 where the identifier should go. */
2580 redeclaration_error_message (tree newdecl
, tree olddecl
)
2582 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2584 /* Because C++ can put things into name space for free,
2585 constructs like "typedef struct foo { ... } foo"
2586 would look like an erroneous redeclaration. */
2587 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2590 return G_("redefinition of %q#D");
2592 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2594 /* If this is a pure function, its olddecl will actually be
2595 the original initialization to `0' (which we force to call
2596 abort()). Don't complain about redefinition in this case. */
2597 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2598 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2601 /* If both functions come from different namespaces, this is not
2602 a redeclaration - this is a conflict with a used function. */
2603 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2604 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2605 && ! decls_match (olddecl
, newdecl
))
2606 return G_("%qD conflicts with used function");
2608 /* We'll complain about linkage mismatches in
2609 warn_extern_redeclared_static. */
2611 /* Defining the same name twice is no good. */
2612 if (DECL_INITIAL (olddecl
) != NULL_TREE
2613 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2615 if (DECL_NAME (olddecl
) == NULL_TREE
)
2616 return G_("%q#D not declared in class");
2617 else if (!GNU_INLINE_P (olddecl
)
2618 || GNU_INLINE_P (newdecl
))
2619 return G_("redefinition of %q#D");
2622 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2624 bool olda
= GNU_INLINE_P (olddecl
);
2625 bool newa
= GNU_INLINE_P (newdecl
);
2630 return G_("%q+D redeclared inline with "
2631 "%<gnu_inline%> attribute");
2633 return G_("%q+D redeclared inline without "
2634 "%<gnu_inline%> attribute");
2638 check_abi_tag_redeclaration
2639 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2640 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2644 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2648 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2650 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2651 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2652 return G_("redefinition of %q#D");
2656 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2657 || (DECL_TEMPLATE_RESULT (newdecl
)
2658 == DECL_TEMPLATE_RESULT (olddecl
)))
2661 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2662 if (DECL_TEMPLATE_INFO (nt
))
2663 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2664 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2665 if (DECL_TEMPLATE_INFO (ot
))
2666 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2667 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2668 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2669 return G_("redefinition of %q#D");
2671 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2673 bool olda
= GNU_INLINE_P (ot
);
2674 bool newa
= GNU_INLINE_P (nt
);
2679 return G_("%q+D redeclared inline with "
2680 "%<gnu_inline%> attribute");
2682 return G_("%q+D redeclared inline without "
2683 "%<gnu_inline%> attribute");
2687 /* Core issue #226 (C++0x):
2689 If a friend function template declaration specifies a
2690 default template-argument, that declaration shall be a
2691 definition and shall be the only declaration of the
2692 function template in the translation unit. */
2693 if ((cxx_dialect
!= cxx98
)
2694 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2695 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2696 /*is_primary=*/true,
2697 /*is_partial=*/false,
2698 /*is_friend_decl=*/2))
2699 return G_("redeclaration of friend %q#D "
2700 "may not have default template arguments");
2704 else if (VAR_P (newdecl
)
2705 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2706 && (! DECL_LANG_SPECIFIC (olddecl
)
2707 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2708 || DECL_THREAD_LOCAL_P (newdecl
)))
2710 /* Only variables can be thread-local, and all declarations must
2711 agree on this property. */
2712 if (DECL_THREAD_LOCAL_P (newdecl
))
2713 return G_("thread-local declaration of %q#D follows "
2714 "non-thread-local declaration");
2716 return G_("non-thread-local declaration of %q#D follows "
2717 "thread-local declaration");
2719 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2721 /* The objects have been declared at namespace scope. If either
2722 is a member of an anonymous union, then this is an invalid
2723 redeclaration. For example:
2729 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2730 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2731 return G_("redeclaration of %q#D");
2732 /* If at least one declaration is a reference, there is no
2733 conflict. For example:
2739 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2741 /* Reject two definitions. */
2742 return G_("redefinition of %q#D");
2746 /* Objects declared with block scope: */
2747 /* Reject two definitions, and reject a definition
2748 together with an external reference. */
2749 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2750 return G_("redeclaration of %q#D");
2755 /* Hash and equality functions for the named_label table. */
2758 named_label_hasher::hash (named_label_entry
*ent
)
2760 return DECL_UID (ent
->label_decl
);
2764 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2766 return a
->label_decl
== b
->label_decl
;
2769 /* Create a new label, named ID. */
2772 make_label_decl (tree id
, int local_p
)
2774 struct named_label_entry
*ent
;
2777 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2779 DECL_CONTEXT (decl
) = current_function_decl
;
2780 DECL_MODE (decl
) = VOIDmode
;
2781 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2783 /* Say where one reference is to the label, for the sake of the
2784 error if it is not defined. */
2785 DECL_SOURCE_LOCATION (decl
) = input_location
;
2787 /* Record the fact that this identifier is bound to this label. */
2788 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2790 /* Create the label htab for the function on demand. */
2792 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2794 /* Record this label on the list of labels used in this function.
2795 We do this before calling make_label_decl so that we get the
2796 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2797 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2798 ent
->label_decl
= decl
;
2800 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2801 gcc_assert (*slot
== NULL
);
2807 /* Look for a label named ID in the current function. If one cannot
2808 be found, create one. (We keep track of used, but undefined,
2809 labels, and complain about them at the end of a function.) */
2812 lookup_label_1 (tree id
)
2816 /* You can't use labels at global scope. */
2817 if (current_function_decl
== NULL_TREE
)
2819 error ("label %qE referenced outside of any function", id
);
2823 /* See if we've already got this label. */
2824 decl
= IDENTIFIER_LABEL_VALUE (id
);
2825 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2828 decl
= make_label_decl (id
, /*local_p=*/0);
2832 /* Wrapper for lookup_label_1. */
2835 lookup_label (tree id
)
2838 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2839 ret
= lookup_label_1 (id
);
2840 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2844 /* Declare a local label named ID. */
2847 declare_local_label (tree id
)
2850 cp_label_binding bind
;
2852 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2853 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2854 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2856 decl
= make_label_decl (id
, /*local_p=*/1);
2858 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2863 /* Returns nonzero if it is ill-formed to jump past the declaration of
2864 DECL. Returns 2 if it's also a real problem. */
2867 decl_jump_unsafe (tree decl
)
2869 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2870 with automatic storage duration is not in scope to a point where it is
2871 in scope is ill-formed unless the variable has scalar type, class type
2872 with a trivial default constructor and a trivial destructor, a
2873 cv-qualified version of one of these types, or an array of one of the
2874 preceding types and is declared without an initializer (8.5). */
2875 tree type
= TREE_TYPE (decl
);
2877 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2878 || type
== error_mark_node
)
2881 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2882 || variably_modified_type_p (type
, NULL_TREE
))
2885 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2891 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2894 identify_goto (tree decl
, const location_t
*locus
)
2896 bool complained
= (decl
2897 ? permerror (input_location
, "jump to label %qD", decl
)
2898 : permerror (input_location
, "jump to case label"));
2899 if (complained
&& locus
)
2900 inform (*locus
, " from here");
2904 /* Check that a single previously seen jump to a newly defined label
2905 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2906 the jump context; NAMES are the names in scope in LEVEL at the jump
2907 context; LOCUS is the source position of the jump or 0. Returns
2908 true if all is well. */
2911 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2912 bool exited_omp
, const location_t
*locus
)
2914 cp_binding_level
*b
;
2915 bool identified
= false, complained
= false;
2916 bool saw_eh
= false, saw_omp
= false;
2920 complained
= identify_goto (decl
, locus
);
2922 inform (input_location
, " exits OpenMP structured block");
2923 identified
= saw_omp
= true;
2926 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2928 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2930 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2931 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2932 : TREE_CHAIN (new_decls
)))
2934 int problem
= decl_jump_unsafe (new_decls
);
2940 complained
= identify_goto (decl
, locus
);
2946 inform (input_location
,
2947 " crosses initialization of %q+#D", new_decls
);
2949 inform (input_location
, " enters scope of %q+#D which has "
2950 "non-trivial destructor", new_decls
);
2956 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2960 complained
= identify_goto (decl
, locus
);
2965 if (b
->kind
== sk_try
)
2966 inform (input_location
, " enters try block");
2968 inform (input_location
, " enters catch block");
2972 if (b
->kind
== sk_omp
&& !saw_omp
)
2976 complained
= identify_goto (decl
, locus
);
2980 inform (input_location
, " enters OpenMP structured block");
2989 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2991 check_previous_goto_1 (decl
, use
->binding_level
,
2992 use
->names_in_scope
, use
->in_omp_scope
,
2993 &use
->o_goto_locus
);
2997 check_switch_goto (cp_binding_level
* level
)
2999 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
3002 /* Check that a new jump to a label DECL is OK. Called by
3003 finish_goto_stmt. */
3006 check_goto (tree decl
)
3008 struct named_label_entry
*ent
, dummy
;
3009 bool saw_catch
= false, identified
= false, complained
= false;
3013 /* We can't know where a computed goto is jumping.
3014 So we assume that it's OK. */
3015 if (TREE_CODE (decl
) != LABEL_DECL
)
3018 /* We didn't record any information about this label when we created it,
3019 and there's not much point since it's trivial to analyze as a return. */
3020 if (decl
== cdtor_label
)
3023 dummy
.label_decl
= decl
;
3024 ent
= named_labels
->find (&dummy
);
3025 gcc_assert (ent
!= NULL
);
3027 /* If the label hasn't been defined yet, defer checking. */
3028 if (! DECL_INITIAL (decl
))
3030 struct named_label_use_entry
*new_use
;
3032 /* Don't bother creating another use if the last goto had the
3033 same data, and will therefore create the same set of errors. */
3035 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3038 new_use
= ggc_alloc
<named_label_use_entry
> ();
3039 new_use
->binding_level
= current_binding_level
;
3040 new_use
->names_in_scope
= current_binding_level
->names
;
3041 new_use
->o_goto_locus
= input_location
;
3042 new_use
->in_omp_scope
= false;
3044 new_use
->next
= ent
->uses
;
3045 ent
->uses
= new_use
;
3049 if (ent
->in_try_scope
|| ent
->in_catch_scope
3050 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3052 complained
= permerror (input_location
, "jump to label %q+D", decl
);
3054 inform (input_location
, " from here");
3058 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3060 int u
= decl_jump_unsafe (bad
);
3062 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3064 /* Can't skip init of __exception_info. */
3066 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3069 else if (complained
)
3072 inform (input_location
, " skips initialization of %q+#D", bad
);
3074 inform (input_location
, " enters scope of %q+#D which has "
3075 "non-trivial destructor", bad
);
3081 if (ent
->in_try_scope
)
3082 inform (input_location
, " enters try block");
3083 else if (ent
->in_catch_scope
&& !saw_catch
)
3084 inform (input_location
, " enters catch block");
3087 if (ent
->in_omp_scope
)
3090 inform (input_location
, " enters OpenMP structured block");
3092 else if (flag_openmp
)
3094 cp_binding_level
*b
;
3095 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3097 if (b
== ent
->binding_level
)
3099 if (b
->kind
== sk_omp
)
3103 complained
= permerror (input_location
,
3104 "jump to label %q+D", decl
);
3106 inform (input_location
, " from here");
3110 inform (input_location
, " exits OpenMP structured block");
3117 /* Check that a return is ok wrt OpenMP structured blocks.
3118 Called by finish_return_stmt. Returns true if all is well. */
3121 check_omp_return (void)
3123 cp_binding_level
*b
;
3124 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3125 if (b
->kind
== sk_omp
)
3127 error ("invalid exit from OpenMP structured block");
3130 else if (b
->kind
== sk_function_parms
)
3135 /* Define a label, specifying the location in the source file.
3136 Return the LABEL_DECL node for the label. */
3139 define_label_1 (location_t location
, tree name
)
3141 struct named_label_entry
*ent
, dummy
;
3142 cp_binding_level
*p
;
3145 decl
= lookup_label (name
);
3147 dummy
.label_decl
= decl
;
3148 ent
= named_labels
->find (&dummy
);
3149 gcc_assert (ent
!= NULL
);
3151 /* After labels, make any new cleanups in the function go into their
3152 own new (temporary) binding contour. */
3153 for (p
= current_binding_level
;
3154 p
->kind
!= sk_function_parms
;
3156 p
->more_cleanups_ok
= 0;
3158 if (name
== get_identifier ("wchar_t"))
3159 permerror (input_location
, "label named wchar_t");
3161 if (DECL_INITIAL (decl
) != NULL_TREE
)
3163 error ("duplicate label %qD", decl
);
3164 return error_mark_node
;
3168 struct named_label_use_entry
*use
;
3170 /* Mark label as having been defined. */
3171 DECL_INITIAL (decl
) = error_mark_node
;
3172 /* Say where in the source. */
3173 DECL_SOURCE_LOCATION (decl
) = location
;
3175 ent
->binding_level
= current_binding_level
;
3176 ent
->names_in_scope
= current_binding_level
->names
;
3178 for (use
= ent
->uses
; use
; use
= use
->next
)
3179 check_previous_goto (decl
, use
);
3186 /* Wrapper for define_label_1. */
3189 define_label (location_t location
, tree name
)
3192 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3193 ret
= define_label_1 (location
, name
);
3194 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3201 cp_binding_level
*level
;
3202 struct cp_switch
*next
;
3203 /* The SWITCH_STMT being built. */
3205 /* A splay-tree mapping the low element of a case range to the high
3206 element, or NULL_TREE if there is no high element. Used to
3207 determine whether or not a new case label duplicates an old case
3208 label. We need a tree, rather than simply a hash table, because
3209 of the GNU case range extension. */
3211 /* Remember whether there was a case value that is outside the
3212 range of the original type of the controlling expression. */
3213 bool outside_range_p
;
3216 /* A stack of the currently active switch statements. The innermost
3217 switch statement is on the top of the stack. There is no need to
3218 mark the stack for garbage collection because it is only active
3219 during the processing of the body of a function, and we never
3220 collect at that point. */
3222 static struct cp_switch
*switch_stack
;
3224 /* Called right after a switch-statement condition is parsed.
3225 SWITCH_STMT is the switch statement being parsed. */
3228 push_switch (tree switch_stmt
)
3230 struct cp_switch
*p
= XNEW (struct cp_switch
);
3231 p
->level
= current_binding_level
;
3232 p
->next
= switch_stack
;
3233 p
->switch_stmt
= switch_stmt
;
3234 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3235 p
->outside_range_p
= false;
3242 struct cp_switch
*cs
= switch_stack
;
3243 location_t switch_location
;
3245 /* Emit warnings as needed. */
3246 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3247 const bool bool_cond_p
3248 = (SWITCH_STMT_TYPE (cs
->switch_stmt
)
3249 && TREE_CODE (SWITCH_STMT_TYPE (cs
->switch_stmt
)) == BOOLEAN_TYPE
);
3250 if (!processing_template_decl
)
3251 c_do_switch_warnings (cs
->cases
, switch_location
,
3252 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3253 SWITCH_STMT_COND (cs
->switch_stmt
),
3254 bool_cond_p
, cs
->outside_range_p
);
3256 splay_tree_delete (cs
->cases
);
3257 switch_stack
= switch_stack
->next
;
3261 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3262 condition. Note that if TYPE and VALUE are already integral we don't
3263 really do the conversion because the language-independent
3264 warning/optimization code will work better that way. */
3267 case_conversion (tree type
, tree value
)
3269 if (value
== NULL_TREE
)
3272 if (cxx_dialect
>= cxx11
3273 && (SCOPED_ENUM_P (type
)
3274 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3276 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3277 type
= type_promotes_to (type
);
3278 value
= (perform_implicit_conversion_flags
3279 (type
, value
, tf_warning_or_error
,
3280 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3282 return cxx_constant_value (value
);
3285 /* Note that we've seen a definition of a case label, and complain if this
3286 is a bad place for one. */
3289 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3292 cp_binding_level
*p
;
3295 if (processing_template_decl
)
3299 /* For templates, just add the case label; we'll do semantic
3300 analysis at instantiation-time. */
3301 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3302 return add_stmt (build_case_label (low_value
, high_value
, label
));
3305 /* Find the condition on which this switch statement depends. */
3306 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3307 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3308 cond
= TREE_VALUE (cond
);
3310 if (!check_switch_goto (switch_stack
->level
))
3311 return error_mark_node
;
3313 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3315 low_value
= case_conversion (type
, low_value
);
3316 high_value
= case_conversion (type
, high_value
);
3318 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3319 low_value
, high_value
,
3320 &switch_stack
->outside_range_p
);
3322 /* After labels, make any new cleanups in the function go into their
3323 own new (temporary) binding contour. */
3324 for (p
= current_binding_level
;
3325 p
->kind
!= sk_function_parms
;
3327 p
->more_cleanups_ok
= 0;
3332 struct typename_info
{
3340 struct typename_hasher
: ggc_ptr_hash
<tree_node
>
3342 typedef typename_info
*compare_type
;
3344 /* Hash a TYPENAME_TYPE. */
3351 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3352 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3357 /* Compare two TYPENAME_TYPEs. */
3360 equal (tree t1
, const typename_info
*t2
)
3362 return (TYPE_IDENTIFIER (t1
) == t2
->name
3363 && TYPE_CONTEXT (t1
) == t2
->scope
3364 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3365 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3366 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3370 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3371 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3373 Returns the new TYPENAME_TYPE. */
3375 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3378 build_typename_type (tree context
, tree name
, tree fullname
,
3379 enum tag_types tag_type
)
3387 if (typename_htab
== NULL
)
3388 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3390 ti
.scope
= FROB_CONTEXT (context
);
3392 ti
.template_id
= fullname
;
3393 ti
.enum_p
= tag_type
== enum_type
;
3394 ti
.class_p
= (tag_type
== class_type
3395 || tag_type
== record_type
3396 || tag_type
== union_type
);
3397 hash
= (htab_hash_pointer (ti
.scope
)
3398 ^ htab_hash_pointer (ti
.name
));
3400 /* See if we already have this type. */
3401 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3406 /* Build the TYPENAME_TYPE. */
3407 t
= cxx_make_type (TYPENAME_TYPE
);
3408 TYPE_CONTEXT (t
) = ti
.scope
;
3409 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3410 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3411 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3413 /* Build the corresponding TYPE_DECL. */
3414 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3415 TYPE_NAME (TREE_TYPE (d
)) = d
;
3416 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3417 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3418 DECL_ARTIFICIAL (d
) = 1;
3420 /* Store it in the hash table. */
3423 /* TYPENAME_TYPEs must always be compared structurally, because
3424 they may or may not resolve down to another type depending on
3425 the currently open classes. */
3426 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3432 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3433 provided to name the type. Returns an appropriate type, unless an
3434 error occurs, in which case error_mark_node is returned. If we
3435 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3436 return that, rather than the _TYPE it corresponds to, in other
3437 cases we look through the type decl. If TF_ERROR is set, complain
3438 about errors, otherwise be quiet. */
3441 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3442 tsubst_flags_t complain
)
3448 if (name
== error_mark_node
3449 || context
== NULL_TREE
3450 || context
== error_mark_node
)
3451 return error_mark_node
;
3455 if (!(TYPE_LANG_SPECIFIC (name
)
3456 && (CLASSTYPE_IS_TEMPLATE (name
)
3457 || CLASSTYPE_USE_TEMPLATE (name
))))
3458 name
= TYPE_IDENTIFIER (name
);
3460 /* Create a TEMPLATE_ID_EXPR for the type. */
3461 name
= build_nt (TEMPLATE_ID_EXPR
,
3462 CLASSTYPE_TI_TEMPLATE (name
),
3463 CLASSTYPE_TI_ARGS (name
));
3465 else if (TREE_CODE (name
) == TYPE_DECL
)
3466 name
= DECL_NAME (name
);
3470 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3472 name
= TREE_OPERAND (name
, 0);
3473 if (DECL_TYPE_TEMPLATE_P (name
))
3474 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3475 if (TREE_CODE (name
) != IDENTIFIER_NODE
)
3477 if (complain
& tf_error
)
3478 error ("%qD is not a type", name
);
3479 return error_mark_node
;
3482 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3484 if (complain
& tf_error
)
3485 error ("%qD used without template parameters", name
);
3486 return error_mark_node
;
3488 gcc_assert (identifier_p (name
));
3489 gcc_assert (TYPE_P (context
));
3491 if (!MAYBE_CLASS_TYPE_P (context
))
3493 if (complain
& tf_error
)
3494 error ("%q#T is not a class", context
);
3495 return error_mark_node
;
3498 /* When the CONTEXT is a dependent type, NAME could refer to a
3499 dependent base class of CONTEXT. But look inside it anyway
3500 if CONTEXT is a currently open scope, in case it refers to a
3501 member of the current instantiation or a non-dependent base;
3502 lookup will stop when we hit a dependent base. */
3503 if (!dependent_scope_p (context
))
3504 /* We should only set WANT_TYPE when we're a nested typename type.
3505 Then we can give better diagnostics if we find a non-type. */
3506 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3510 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3511 return build_typename_type (context
, name
, fullname
, tag_type
);
3513 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3517 if (complain
& tf_error
)
3518 error (want_template
? G_("no class template named %q#T in %q#T")
3519 : G_("no type named %q#T in %q#T"), name
, context
);
3520 return error_mark_node
;
3523 /* Pull out the template from an injected-class-name (or multiple). */
3525 t
= maybe_get_template_decl_from_type_decl (t
);
3527 if (TREE_CODE (t
) == TREE_LIST
)
3529 if (complain
& tf_error
)
3531 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3532 print_candidates (t
);
3534 return error_mark_node
;
3537 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3539 if (complain
& tf_error
)
3540 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3542 return error_mark_node
;
3544 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3546 if (complain
& tf_error
)
3547 error ("%<typename %T::%D%> names %q#T, which is not a type",
3549 return error_mark_node
;
3552 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3553 return error_mark_node
;
3555 /* If we are currently parsing a template and if T is a typedef accessed
3556 through CONTEXT then we need to remember and check access of T at
3557 template instantiation time. */
3558 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3561 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3563 /*entering_scope=*/0,
3564 complain
| tf_user
);
3566 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3569 maybe_record_typedef_use (t
);
3574 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3575 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3576 in which case error_mark_node is returned.
3578 If PARM_LIST is non-NULL, also make sure that the template parameter
3579 list of TEMPLATE_DECL matches.
3581 If COMPLAIN zero, don't complain about any errors that occur. */
3584 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3585 tsubst_flags_t complain
)
3591 name
= TYPE_IDENTIFIER (name
);
3592 else if (DECL_P (name
))
3593 name
= DECL_NAME (name
);
3594 gcc_assert (identifier_p (name
));
3596 if (!dependent_type_p (context
)
3597 || currently_open_class (context
))
3599 tree tmpl
= NULL_TREE
;
3601 if (MAYBE_CLASS_TYPE_P (context
))
3602 tmpl
= lookup_field (context
, name
, 0, false);
3604 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3605 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3607 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3609 if (complain
& tf_error
)
3610 error ("no class template named %q#T in %q#T", name
, context
);
3611 return error_mark_node
;
3615 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3617 if (complain
& tf_error
)
3619 error ("template parameters do not match template %qD", tmpl
);
3620 inform (DECL_SOURCE_LOCATION (tmpl
),
3621 "%qD declared here", tmpl
);
3623 return error_mark_node
;
3626 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3628 return error_mark_node
;
3633 /* Build the UNBOUND_CLASS_TEMPLATE. */
3634 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3635 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3636 TREE_TYPE (t
) = NULL_TREE
;
3637 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3639 /* Build the corresponding TEMPLATE_DECL. */
3640 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3641 TYPE_NAME (TREE_TYPE (d
)) = d
;
3642 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3643 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3644 DECL_ARTIFICIAL (d
) = 1;
3645 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3652 /* Push the declarations of builtin types into the namespace.
3653 RID_INDEX is the index of the builtin type in the array
3654 RID_POINTERS. NAME is the name used when looking up the builtin
3655 type. TYPE is the _TYPE node for the builtin type. */
3658 record_builtin_type (enum rid rid_index
,
3662 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3663 tree tdecl
= NULL_TREE
;
3665 if ((int) rid_index
< (int) RID_MAX
)
3666 rname
= ridpointers
[(int) rid_index
];
3668 tname
= get_identifier (name
);
3670 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3671 eliminated. Built-in types should not be looked up name; their
3672 names are keywords that the parser can recognize. However, there
3673 is code in c-common.c that uses identifier_global_value to look
3674 up built-in types by name. */
3677 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3678 DECL_ARTIFICIAL (tdecl
) = 1;
3679 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3685 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3686 DECL_ARTIFICIAL (tdecl
) = 1;
3688 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3691 if (!TYPE_NAME (type
))
3692 TYPE_NAME (type
) = tdecl
;
3695 debug_hooks
->type_decl (tdecl
, 0);
3698 /* Record one of the standard Java types.
3699 * Declare it as having the given NAME.
3700 * If SIZE > 0, it is the size of one of the integral types;
3701 * otherwise it is the negative of the size of one of the other types. */
3704 record_builtin_java_type (const char* name
, int size
)
3709 type
= build_nonstandard_integer_type (size
, 0);
3710 type
= build_distinct_type_copy (type
);
3712 else if (size
> -32)
3715 /* "__java_char" or ""__java_boolean". */
3716 type
= build_nonstandard_integer_type (-size
, 1);
3717 type
= build_distinct_type_copy (type
);
3718 /* Get the signed type cached and attached to the unsigned type,
3719 so it doesn't get garbage-collected at "random" times,
3720 causing potential codegen differences out of different UIDs
3721 and different alias set numbers. */
3722 stype
= build_nonstandard_integer_type (-size
, 0);
3723 stype
= build_distinct_type_copy (stype
);
3724 TREE_CHAIN (type
) = stype
;
3725 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3728 { /* "__java_float" or ""__java_double". */
3729 type
= make_node (REAL_TYPE
);
3730 TYPE_PRECISION (type
) = - size
;
3733 record_builtin_type (RID_MAX
, name
, type
);
3734 decl
= TYPE_NAME (type
);
3736 /* Suppress generate debug symbol entries for these types,
3737 since for normal C++ they are just clutter.
3738 However, push_lang_context undoes this if extern "Java" is seen. */
3739 DECL_IGNORED_P (decl
) = 1;
3741 TYPE_FOR_JAVA (type
) = 1;
3745 /* Push a type into the namespace so that the back ends ignore it. */
3748 record_unknown_type (tree type
, const char* name
)
3750 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3751 TYPE_DECL
, get_identifier (name
), type
));
3752 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3753 DECL_IGNORED_P (decl
) = 1;
3754 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3755 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3756 TYPE_ALIGN (type
) = 1;
3757 TYPE_USER_ALIGN (type
) = 0;
3758 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3761 /* A string for which we should create an IDENTIFIER_NODE at
3764 typedef struct predefined_identifier
3766 /* The name of the identifier. */
3767 const char *const name
;
3768 /* The place where the IDENTIFIER_NODE should be stored. */
3770 /* Nonzero if this is the name of a constructor or destructor. */
3771 const int ctor_or_dtor_p
;
3772 } predefined_identifier
;
3774 /* Create all the predefined identifiers. */
3777 initialize_predefined_identifiers (void)
3779 const predefined_identifier
*pid
;
3781 /* A table of identifiers to create at startup. */
3782 static const predefined_identifier predefined_identifiers
[] = {
3783 { "C++", &lang_name_cplusplus
, 0 },
3784 { "C", &lang_name_c
, 0 },
3785 { "Java", &lang_name_java
, 0 },
3786 /* Some of these names have a trailing space so that it is
3787 impossible for them to conflict with names written by users. */
3788 { "__ct ", &ctor_identifier
, 1 },
3789 { "__base_ctor ", &base_ctor_identifier
, 1 },
3790 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3791 { "__dt ", &dtor_identifier
, 1 },
3792 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3793 { "__base_dtor ", &base_dtor_identifier
, 1 },
3794 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3795 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3796 { "nelts", &nelts_identifier
, 0 },
3797 { THIS_NAME
, &this_identifier
, 0 },
3798 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3799 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3800 { "_vptr", &vptr_identifier
, 0 },
3801 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3802 { "::", &global_scope_name
, 0 },
3803 { "std", &std_identifier
, 0 },
3807 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3809 *pid
->node
= get_identifier (pid
->name
);
3810 if (pid
->ctor_or_dtor_p
)
3811 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3815 /* Create the predefined scalar types of C,
3816 and some nodes representing standard constants (0, 1, (void *)0).
3817 Initialize the global binding level.
3818 Make definitions for built-in primitive functions. */
3821 cxx_init_decl_processing (void)
3824 tree void_ftype_ptr
;
3826 /* Create all the identifiers we need. */
3827 initialize_predefined_identifiers ();
3829 /* Create the global variables. */
3830 push_to_top_level ();
3832 current_function_decl
= NULL_TREE
;
3833 current_binding_level
= NULL
;
3834 /* Enter the global namespace. */
3835 gcc_assert (global_namespace
== NULL_TREE
);
3836 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3838 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3839 debug_hooks
->register_main_translation_unit
3840 (DECL_CONTEXT (global_namespace
));
3841 TREE_PUBLIC (global_namespace
) = 1;
3842 begin_scope (sk_namespace
, global_namespace
);
3844 if (flag_visibility_ms_compat
)
3845 default_visibility
= VISIBILITY_HIDDEN
;
3848 current_lang_name
= lang_name_c
;
3850 /* Create the `std' namespace. */
3851 push_namespace (std_identifier
);
3852 std_node
= current_namespace
;
3855 c_common_nodes_and_builtins ();
3857 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3858 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3859 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3860 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3861 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3862 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3863 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3864 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3866 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3868 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3869 truthvalue_type_node
= boolean_type_node
;
3870 truthvalue_false_node
= boolean_false_node
;
3871 truthvalue_true_node
= boolean_true_node
;
3873 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3874 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3875 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3878 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3881 delta_type_node
= ptrdiff_type_node
;
3882 vtable_index_type
= ptrdiff_type_node
;
3884 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3885 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3886 void_ftype_ptr
= build_function_type_list (void_type_node
,
3887 ptr_type_node
, NULL_TREE
);
3889 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3891 /* C++ extensions */
3893 unknown_type_node
= make_node (LANG_TYPE
);
3894 record_unknown_type (unknown_type_node
, "unknown type");
3896 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3897 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3899 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3901 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3902 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3904 init_list_type_node
= make_node (LANG_TYPE
);
3905 record_unknown_type (init_list_type_node
, "init list");
3908 /* Make sure we get a unique function type, so we can give
3909 its pointer type a name. (This wins for gdb.) */
3910 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3911 TREE_TYPE (vfunc_type
) = integer_type_node
;
3912 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3913 layout_type (vfunc_type
);
3915 vtable_entry_type
= build_pointer_type (vfunc_type
);
3917 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3920 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3921 layout_type (vtbl_type_node
);
3922 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3923 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3924 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3925 layout_type (vtbl_ptr_type_node
);
3926 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3928 push_namespace (get_identifier ("__cxxabiv1"));
3929 abi_node
= current_namespace
;
3932 global_type_node
= make_node (LANG_TYPE
);
3933 record_unknown_type (global_type_node
, "global type");
3936 current_lang_name
= lang_name_cplusplus
;
3939 tree newattrs
, extvisattr
;
3940 tree newtype
, deltype
;
3941 tree ptr_ftype_sizetype
;
3945 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3946 if (cxx_dialect
== cxx98
)
3949 tree bad_alloc_type_node
;
3950 tree bad_alloc_decl
;
3952 push_namespace (std_identifier
);
3953 bad_alloc_id
= get_identifier ("bad_alloc");
3954 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3955 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3957 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3958 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3962 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3965 new_eh_spec
= noexcept_false_spec
;
3967 /* Ensure attribs.c is initialized. */
3969 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3971 newattrs
= tree_cons (get_identifier ("alloc_size"),
3972 build_tree_list (NULL_TREE
, integer_one_node
),
3974 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3975 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3976 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3977 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3978 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3979 DECL_IS_MALLOC (opnew
) = 1;
3980 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3981 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3982 DECL_IS_MALLOC (opnew
) = 1;
3983 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3984 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3985 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3986 if (flag_sized_deallocation
)
3988 /* Also push the sized deallocation variants:
3989 void operator delete(void*, std::size_t) throw();
3990 void operator delete[](void*, std::size_t) throw(); */
3991 tree void_ftype_ptr_size
3992 = build_function_type_list (void_type_node
, ptr_type_node
,
3993 size_type_node
, NULL_TREE
);
3994 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
3996 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3997 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3998 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4001 nullptr_type_node
= make_node (NULLPTR_TYPE
);
4002 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
4003 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
4004 TYPE_UNSIGNED (nullptr_type_node
) = 1;
4005 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
4006 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
4007 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
4008 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
4012 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
4013 ECF_NORETURN
| ECF_NOTHROW
);
4015 /* Perform other language dependent initializations. */
4016 init_class_processing ();
4017 init_rtti_processing ();
4018 init_template_processing ();
4020 if (flag_exceptions
)
4021 init_exception_processing ();
4023 if (! supports_one_only ())
4026 make_fname_decl
= cp_make_fname_decl
;
4027 start_fname_decls ();
4029 /* Show we use EH for cleanups. */
4030 if (flag_exceptions
)
4031 using_eh_for_cleanups ();
4034 /* Generate an initializer for a function naming variable from
4035 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4036 filled in with the type of the init. */
4039 cp_fname_init (const char* name
, tree
*type_p
)
4041 tree domain
= NULL_TREE
;
4043 tree init
= NULL_TREE
;
4048 length
= strlen (name
);
4049 domain
= build_index_type (size_int (length
));
4050 init
= build_string (length
+ 1, name
);
4053 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4054 type
= build_cplus_array_type (type
, domain
);
4059 TREE_TYPE (init
) = type
;
4061 init
= error_mark_node
;
4066 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4067 the decl, LOC is the location to give the decl, NAME is the
4068 initialization string and TYPE_DEP indicates whether NAME depended
4069 on the type of the function. We make use of that to detect
4070 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4071 at the point of first use, so we mustn't push the decl now. */
4074 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4076 const char *const name
= (type_dep
&& processing_template_decl
4077 ? NULL
: fname_as_string (type_dep
));
4079 tree init
= cp_fname_init (name
, &type
);
4080 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4083 free (CONST_CAST (char *, name
));
4085 /* As we're using pushdecl_with_scope, we must set the context. */
4086 DECL_CONTEXT (decl
) = current_function_decl
;
4088 TREE_STATIC (decl
) = 1;
4089 TREE_READONLY (decl
) = 1;
4090 DECL_ARTIFICIAL (decl
) = 1;
4092 TREE_USED (decl
) = 1;
4094 if (current_function_decl
)
4096 cp_binding_level
*b
= current_binding_level
;
4097 if (b
->kind
== sk_function_parms
)
4098 return error_mark_node
;
4099 while (b
->level_chain
->kind
!= sk_function_parms
)
4101 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4102 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4103 LOOKUP_ONLYCONVERTING
);
4107 DECL_THIS_STATIC (decl
) = true;
4108 pushdecl_top_level_and_finish (decl
, init
);
4115 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4117 tree id
= DECL_NAME (decl
);
4118 const char *name
= IDENTIFIER_POINTER (id
);
4120 retrofit_lang_decl (decl
);
4122 DECL_ARTIFICIAL (decl
) = 1;
4123 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4124 SET_DECL_LANGUAGE (decl
, lang_c
);
4125 /* Runtime library routines are, by definition, available in an
4126 external shared object. */
4127 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4128 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4130 DECL_CONTEXT (decl
) = context
;
4133 pushdecl_top_level (decl
);
4137 /* A function in the user's namespace should have an explicit
4138 declaration before it is used. Mark the built-in function as
4139 anticipated but not actually declared. */
4140 if (name
[0] != '_' || name
[1] != '_')
4141 DECL_ANTICIPATED (decl
) = 1;
4142 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4144 size_t len
= strlen (name
);
4146 /* Treat __*_chk fortification functions as anticipated as well,
4147 unless they are __builtin_*. */
4148 if (len
> strlen ("___chk")
4149 && memcmp (name
+ len
- strlen ("_chk"),
4150 "_chk", strlen ("_chk") + 1) == 0)
4151 DECL_ANTICIPATED (decl
) = 1;
4158 cxx_builtin_function (tree decl
)
4160 tree id
= DECL_NAME (decl
);
4161 const char *name
= IDENTIFIER_POINTER (id
);
4162 /* All builtins that don't begin with an '_' should additionally
4163 go in the 'std' namespace. */
4166 tree decl2
= copy_node(decl
);
4167 push_namespace (std_identifier
);
4168 builtin_function_1 (decl2
, std_node
, false);
4172 return builtin_function_1 (decl
, NULL_TREE
, false);
4175 /* Like cxx_builtin_function, but guarantee the function is added to the global
4176 scope. This is to allow function specific options to add new machine
4177 dependent builtins when the target ISA changes via attribute((target(...)))
4178 which saves space on program startup if the program does not use non-generic
4182 cxx_builtin_function_ext_scope (tree decl
)
4185 tree id
= DECL_NAME (decl
);
4186 const char *name
= IDENTIFIER_POINTER (id
);
4187 /* All builtins that don't begin with an '_' should additionally
4188 go in the 'std' namespace. */
4191 tree decl2
= copy_node(decl
);
4192 push_namespace (std_identifier
);
4193 builtin_function_1 (decl2
, std_node
, true);
4197 return builtin_function_1 (decl
, NULL_TREE
, true);
4200 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4201 function. Not called directly. */
4204 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4207 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4208 DECL_EXTERNAL (fn
) = 1;
4209 TREE_PUBLIC (fn
) = 1;
4210 DECL_ARTIFICIAL (fn
) = 1;
4211 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4212 SET_DECL_LANGUAGE (fn
, lang_c
);
4213 /* Runtime library routines are, by definition, available in an
4214 external shared object. */
4215 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4216 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4217 set_call_expr_flags (fn
, ecf_flags
);
4221 /* Returns the _DECL for a library function with C++ linkage. */
4224 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4227 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4228 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4229 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4233 /* Like build_library_fn, but takes a C string instead of an
4237 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4239 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4242 /* Like build_cp_library_fn, but takes a C string instead of an
4246 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4248 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4252 /* Like build_library_fn, but also pushes the function so that we will
4253 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4254 may throw exceptions listed in RAISES. */
4257 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4262 type
= build_exception_variant (type
, raises
);
4264 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4265 pushdecl_top_level (fn
);
4269 /* Like build_cp_library_fn, but also pushes the function so that it
4270 will be found by normal lookup. */
4273 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4276 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4281 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4285 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4289 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4291 tree type
= build_function_type (void_type_node
, parmtypes
);
4292 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4295 /* Like push_library_fn, but also note that this function throws
4296 and does not return. Used for __throw_foo and the like. */
4299 push_throw_library_fn (tree name
, tree type
)
4301 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4305 /* When we call finish_struct for an anonymous union, we create
4306 default copy constructors and such. But, an anonymous union
4307 shouldn't have such things; this function undoes the damage to the
4308 anonymous union type T.
4310 (The reason that we create the synthesized methods is that we don't
4311 distinguish `union { int i; }' from `typedef union { int i; } U'.
4312 The first is an anonymous union; the second is just an ordinary
4316 fixup_anonymous_aggr (tree t
)
4320 /* Wipe out memory of synthesized methods. */
4321 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4322 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4323 TYPE_HAS_COPY_CTOR (t
) = 0;
4324 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4325 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4326 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4328 /* Splice the implicitly generated functions out of the TYPE_METHODS
4330 q
= &TYPE_METHODS (t
);
4333 if (DECL_ARTIFICIAL (*q
))
4334 *q
= TREE_CHAIN (*q
);
4336 q
= &DECL_CHAIN (*q
);
4339 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4340 if (TYPE_METHODS (t
))
4342 tree decl
= TYPE_MAIN_DECL (t
);
4344 if (TREE_CODE (t
) != UNION_TYPE
)
4345 error_at (DECL_SOURCE_LOCATION (decl
),
4346 "an anonymous struct cannot have function members");
4348 error_at (DECL_SOURCE_LOCATION (decl
),
4349 "an anonymous union cannot have function members");
4352 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4353 assignment operators (because they cannot have these methods themselves).
4354 For anonymous unions this is already checked because they are not allowed
4355 in any union, otherwise we have to check it. */
4356 if (TREE_CODE (t
) != UNION_TYPE
)
4360 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4361 if (TREE_CODE (field
) == FIELD_DECL
)
4363 type
= TREE_TYPE (field
);
4364 if (CLASS_TYPE_P (type
))
4366 if (TYPE_NEEDS_CONSTRUCTING (type
))
4367 error ("member %q+#D with constructor not allowed "
4368 "in anonymous aggregate", field
);
4369 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4370 error ("member %q+#D with destructor not allowed "
4371 "in anonymous aggregate", field
);
4372 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4373 error ("member %q+#D with copy assignment operator "
4374 "not allowed in anonymous aggregate", field
);
4380 /* Warn for an attribute located at LOCATION that appertains to the
4381 class type CLASS_TYPE that has not been properly placed after its
4382 class-key, in it class-specifier. */
4385 warn_misplaced_attr_for_class_type (source_location location
,
4388 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4390 if (warning_at (location
, OPT_Wattributes
,
4391 "attribute ignored in declaration "
4392 "of %q#T", class_type
))
4394 "attribute for %q#T must follow the %qs keyword",
4395 class_type
, class_key_or_enum_as_string (class_type
));
4398 /* Make sure that a declaration with no declarator is well-formed, i.e.
4399 just declares a tagged type or anonymous union.
4401 Returns the type declared; or NULL_TREE if none. */
4404 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4405 bool explicit_type_instantiation_p
)
4407 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4408 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4409 /* If a class, struct, or enum type is declared by the DECLSPECS
4410 (i.e, if a class-specifier, enum-specifier, or non-typename
4411 elaborated-type-specifier appears in the DECLSPECS),
4412 DECLARED_TYPE is set to the corresponding type. */
4413 tree declared_type
= NULL_TREE
;
4414 bool error_p
= false;
4416 if (declspecs
->multiple_types_p
)
4417 error ("multiple types in one declaration");
4418 else if (declspecs
->redefined_builtin_type
)
4420 if (!in_system_header_at (input_location
))
4421 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4422 "redeclaration of C++ built-in type %qT",
4423 declspecs
->redefined_builtin_type
);
4428 && TYPE_P (declspecs
->type
)
4429 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4430 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4431 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4432 declared_type
= declspecs
->type
;
4433 else if (declspecs
->type
== error_mark_node
)
4435 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4436 permerror (input_location
, "declaration does not declare anything");
4437 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4439 error ("%<auto%> can only be specified for variables "
4440 "or function declarations");
4441 return error_mark_node
;
4443 /* Check for an anonymous union. */
4444 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4445 && TYPE_ANONYMOUS_P (declared_type
))
4447 /* 7/3 In a simple-declaration, the optional init-declarator-list
4448 can be omitted only when declaring a class (clause 9) or
4449 enumeration (7.2), that is, when the decl-specifier-seq contains
4450 either a class-specifier, an elaborated-type-specifier with
4451 a class-key (9.1), or an enum-specifier. In these cases and
4452 whenever a class-specifier or enum-specifier is present in the
4453 decl-specifier-seq, the identifiers in these specifiers are among
4454 the names being declared by the declaration (as class-name,
4455 enum-names, or enumerators, depending on the syntax). In such
4456 cases, and except for the declaration of an unnamed bit-field (9.6),
4457 the decl-specifier-seq shall introduce one or more names into the
4458 program, or shall redeclare a name introduced by a previous
4459 declaration. [Example:
4460 enum { }; // ill-formed
4461 typedef class { }; // ill-formed
4465 error ("missing type-name in typedef-declaration");
4468 /* Anonymous unions are objects, so they can have specifiers. */;
4469 SET_ANON_AGGR_TYPE_P (declared_type
);
4471 if (TREE_CODE (declared_type
) != UNION_TYPE
4472 && !in_system_header_at (input_location
))
4473 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4478 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
4479 error_at (declspecs
->locations
[ds_inline
],
4480 "%<inline%> can only be specified for functions");
4481 else if (decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4482 error_at (declspecs
->locations
[ds_virtual
],
4483 "%<virtual%> can only be specified for functions");
4485 && (!current_class_type
4486 || current_scope () != current_class_type
))
4487 error_at (declspecs
->locations
[ds_friend
],
4488 "%<friend%> can only be specified inside a class");
4489 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4490 error_at (declspecs
->locations
[ds_explicit
],
4491 "%<explicit%> can only be specified for constructors");
4492 else if (declspecs
->storage_class
)
4493 error_at (declspecs
->locations
[ds_storage_class
],
4494 "a storage class can only be specified for objects "
4496 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
4497 error_at (declspecs
->locations
[ds_const
],
4498 "%<const%> can only be specified for objects and "
4500 else if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
4501 error_at (declspecs
->locations
[ds_volatile
],
4502 "%<volatile%> can only be specified for objects and "
4504 else if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
4505 error_at (declspecs
->locations
[ds_restrict
],
4506 "%<__restrict%> can only be specified for objects and "
4508 else if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4509 error_at (declspecs
->locations
[ds_thread
],
4510 "%<__thread%> can only be specified for objects "
4512 else if (saw_typedef
)
4513 warning_at (declspecs
->locations
[ds_typedef
], 0,
4514 "%<typedef%> was ignored in this declaration");
4515 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4516 error_at (declspecs
->locations
[ds_constexpr
],
4517 "%<constexpr%> cannot be used for type declarations");
4520 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4523 if (!CLASS_TYPE_P (declared_type
)
4524 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4525 /* For a non-template class, use the name location. */
4526 loc
= location_of (declared_type
);
4528 /* For a template class (an explicit instantiation), use the
4529 current location. */
4530 loc
= input_location
;
4532 if (explicit_type_instantiation_p
)
4533 /* [dcl.attr.grammar]/4:
4535 No attribute-specifier-seq shall appertain to an explicit
4538 if (warning_at (loc
, OPT_Wattributes
,
4539 "attribute ignored in explicit instantiation %q#T",
4542 "no attribute can be applied to "
4543 "an explicit instantiation");
4546 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4549 return declared_type
;
4552 /* Called when a declaration is seen that contains no names to declare.
4553 If its type is a reference to a structure, union or enum inherited
4554 from a containing scope, shadow that tag name for the current scope
4555 with a forward reference.
4556 If its type defines a new named structure or union
4557 or defines an enum, it is valid but we need not do anything here.
4558 Otherwise, it is an error.
4560 C++: may have to grok the declspecs to learn about static,
4561 complain for anonymous unions.
4563 Returns the TYPE declared -- or NULL_TREE if none. */
4566 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4568 tree t
= check_tag_decl (declspecs
,
4569 /*explicit_type_instantiation_p=*/false);
4574 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4577 /* This is where the variables in an anonymous union are
4578 declared. An anonymous union declaration looks like:
4580 because there is no declarator after the union, the parser
4581 sends that declaration here. */
4582 if (ANON_AGGR_TYPE_P (t
))
4584 fixup_anonymous_aggr (t
);
4586 if (TYPE_FIELDS (t
))
4588 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4589 declspecs
, NORMAL
, 0, NULL
);
4590 finish_anon_union (decl
);
4597 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4600 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4601 const cp_declarator
*declarator
,
4602 bool is_template_arg
)
4606 enum decl_context context
4607 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4608 attrs
= type_specifiers
->attributes
;
4609 type_specifiers
->attributes
= NULL_TREE
;
4610 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4611 if (attrs
&& type
!= error_mark_node
)
4613 if (CLASS_TYPE_P (type
))
4614 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4615 "outside of definition", type
);
4616 else if (MAYBE_CLASS_TYPE_P (type
))
4617 /* A template type parameter or other dependent type. */
4618 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4619 "type %qT without an associated declaration", type
);
4621 cplus_decl_attributes (&type
, attrs
, 0);
4626 /* Process a DECLARATOR for a function-scope variable declaration,
4627 namespace-scope variable declaration, or function declaration.
4628 (Function definitions go through start_function; class member
4629 declarations appearing in the body of the class go through
4630 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4631 If an error occurs, the error_mark_node is returned instead.
4633 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4634 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4635 for an explicitly defaulted function, or SD_DELETED for an explicitly
4636 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4637 implicitly initialized via a default constructor. ATTRIBUTES and
4638 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4640 The scope represented by the context of the returned DECL is pushed
4641 (if it is not the global namespace) and is assigned to
4642 *PUSHED_SCOPE_P. The caller is then responsible for calling
4643 pop_scope on *PUSHED_SCOPE_P if it is set. */
4646 start_decl (const cp_declarator
*declarator
,
4647 cp_decl_specifier_seq
*declspecs
,
4650 tree prefix_attributes
,
4651 tree
*pushed_scope_p
)
4659 *pushed_scope_p
= NULL_TREE
;
4661 /* An object declared as __attribute__((deprecated)) suppresses
4662 warnings of uses of other deprecated items. */
4663 if (lookup_attribute ("deprecated", attributes
))
4664 deprecated_state
= DEPRECATED_SUPPRESS
;
4666 attributes
= chainon (attributes
, prefix_attributes
);
4668 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4671 deprecated_state
= DEPRECATED_NORMAL
;
4673 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4674 || decl
== error_mark_node
)
4675 return error_mark_node
;
4677 context
= CP_DECL_CONTEXT (decl
);
4678 if (context
!= global_namespace
)
4679 *pushed_scope_p
= push_scope (context
);
4681 /* Is it valid for this decl to have an initializer at all?
4682 If not, set INITIALIZED to zero, which will indirectly
4683 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4685 && TREE_CODE (decl
) == TYPE_DECL
)
4687 error ("typedef %qD is initialized (use decltype instead)", decl
);
4688 return error_mark_node
;
4693 if (! toplevel_bindings_p ()
4694 && DECL_EXTERNAL (decl
))
4695 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4697 DECL_EXTERNAL (decl
) = 0;
4698 if (toplevel_bindings_p ())
4699 TREE_STATIC (decl
) = 1;
4701 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4703 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4704 record_key_method_defined (decl
);
4706 /* If this is a typedef that names the class for linkage purposes
4707 (7.1.3p8), apply any attributes directly to the type. */
4708 if (TREE_CODE (decl
) == TYPE_DECL
4709 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4710 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4711 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4715 /* Set attributes here so if duplicate decl, will have proper attributes. */
4716 cplus_decl_attributes (&decl
, attributes
, flags
);
4718 /* Dllimported symbols cannot be defined. Static data members (which
4719 can be initialized in-class and dllimported) go through grokfield,
4720 not here, so we don't need to exclude those decls when checking for
4722 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4724 error ("definition of %q#D is marked %<dllimport%>", decl
);
4725 DECL_DLLIMPORT_P (decl
) = 0;
4728 /* If #pragma weak was used, mark the decl weak now. */
4729 if (!processing_template_decl
)
4730 maybe_apply_pragma_weak (decl
);
4732 if (TREE_CODE (decl
) == FUNCTION_DECL
4733 && DECL_DECLARED_INLINE_P (decl
)
4734 && DECL_UNINLINABLE (decl
)
4735 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4736 warning (0, "inline function %q+D given attribute noinline", decl
);
4738 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4740 bool this_tmpl
= (processing_template_decl
4741 > template_class_depth (context
));
4744 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4745 if (field
== NULL_TREE
4746 || !(VAR_P (field
) || variable_template_p (field
)))
4747 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4748 else if (variable_template_p (field
) && !this_tmpl
)
4750 if (DECL_LANG_SPECIFIC (decl
)
4751 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4752 /* OK, specialization was already checked. */;
4755 error_at (DECL_SOURCE_LOCATION (decl
),
4756 "non-member-template declaration of %qD", decl
);
4757 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4758 "member template declaration here");
4759 return error_mark_node
;
4764 if (variable_template_p (field
))
4765 field
= DECL_TEMPLATE_RESULT (field
);
4767 if (DECL_CONTEXT (field
) != context
)
4769 if (!same_type_p (DECL_CONTEXT (field
), context
))
4770 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4771 "to be defined as %<%T::%D%>",
4772 DECL_CONTEXT (field
), DECL_NAME (decl
),
4773 context
, DECL_NAME (decl
));
4774 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4776 /* Static data member are tricky; an in-class initialization
4777 still doesn't provide a definition, so the in-class
4778 declaration will have DECL_EXTERNAL set, but will have an
4779 initialization. Thus, duplicate_decls won't warn
4780 about this situation, and so we check here. */
4781 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4782 error ("duplicate initialization of %qD", decl
);
4783 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4785 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4786 && !DECL_DECLARED_CONSTEXPR_P (field
))
4787 error ("%qD declared %<constexpr%> outside its class", field
);
4792 tree field
= check_classfn (context
, decl
,
4794 ? current_template_parms
4796 if (field
&& field
!= error_mark_node
4797 && duplicate_decls (decl
, field
,
4798 /*newdecl_is_friend=*/false))
4802 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4803 DECL_IN_AGGR_P (decl
) = 0;
4804 /* Do not mark DECL as an explicit specialization if it was not
4805 already marked as an instantiation; a declaration should
4806 never be marked as a specialization unless we know what
4807 template is being specialized. */
4808 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4810 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4811 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4812 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4813 && DECL_DECLARED_INLINE_P (decl
));
4815 DECL_COMDAT (decl
) = false;
4817 /* [temp.expl.spec] An explicit specialization of a static data
4818 member of a template is a definition if the declaration
4819 includes an initializer; otherwise, it is a declaration.
4821 We check for processing_specialization so this only applies
4822 to the new specialization syntax. */
4823 if (!initialized
&& processing_specialization
)
4824 DECL_EXTERNAL (decl
) = 1;
4827 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4828 /* Aliases are definitions. */
4830 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4834 was_public
= TREE_PUBLIC (decl
);
4836 /* Enter this declaration into the symbol table. Don't push the plain
4837 VAR_DECL for a variable template. */
4838 if (!template_parm_scope_p ()
4840 decl
= maybe_push_decl (decl
);
4842 if (processing_template_decl
)
4843 decl
= push_template_decl (decl
);
4844 if (decl
== error_mark_node
)
4845 return error_mark_node
;
4848 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4849 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4851 /* This is a const variable with implicit 'static'. Set
4852 DECL_THIS_STATIC so we can tell it from variables that are
4853 !TREE_PUBLIC because of the anonymous namespace. */
4854 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4855 DECL_THIS_STATIC (decl
) = 1;
4858 if (current_function_decl
&& VAR_P (decl
)
4859 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4862 if (DECL_THREAD_LOCAL_P (decl
))
4863 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4865 else if (TREE_STATIC (decl
))
4866 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4870 cp_function_chain
->invalid_constexpr
= true;
4873 if (!processing_template_decl
&& VAR_P (decl
))
4874 start_decl_1 (decl
, initialized
);
4879 /* Process the declaration of a variable DECL. INITIALIZED is true
4880 iff DECL is explicitly initialized. (INITIALIZED is false if the
4881 variable is initialized via an implicitly-called constructor.)
4882 This function must be called for ordinary variables (including, for
4883 example, implicit instantiations of templates), but must not be
4884 called for template declarations. */
4887 start_decl_1 (tree decl
, bool initialized
)
4891 bool aggregate_definition_p
;
4893 gcc_assert (!processing_template_decl
);
4895 if (error_operand_p (decl
))
4898 gcc_assert (VAR_P (decl
));
4900 type
= TREE_TYPE (decl
);
4901 complete_p
= COMPLETE_TYPE_P (type
);
4902 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4904 /* If an explicit initializer is present, or if this is a definition
4905 of an aggregate, then we need a complete type at this point.
4906 (Scalars are always complete types, so there is nothing to
4907 check.) This code just sets COMPLETE_P; errors (if necessary)
4908 are issued below. */
4909 if ((initialized
|| aggregate_definition_p
)
4911 && COMPLETE_TYPE_P (complete_type (type
)))
4914 /* We will not yet have set TREE_READONLY on DECL if the type
4915 was "const", but incomplete, before this point. But, now, we
4916 have a complete type, so we can try again. */
4917 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4921 /* Is it valid for this decl to have an initializer at all? */
4923 /* Don't allow initializations for incomplete types except for
4924 arrays which might be completed by the initialization. */
4926 ; /* A complete type is ok. */
4927 else if (type_uses_auto (type
))
4928 ; /* An auto type is ok. */
4929 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4931 error ("variable %q#D has initializer but incomplete type", decl
);
4932 type
= TREE_TYPE (decl
) = error_mark_node
;
4934 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4936 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4937 error ("elements of array %q#D have incomplete type", decl
);
4938 /* else we already gave an error in start_decl. */
4941 else if (aggregate_definition_p
&& !complete_p
)
4943 if (type_uses_auto (type
))
4944 error ("declaration of %q#D has no initializer", decl
);
4946 error ("aggregate %q#D has incomplete type and cannot be defined",
4948 /* Change the type so that assemble_variable will give
4949 DECL an rtl we can live with: (mem (const_int 0)). */
4950 type
= TREE_TYPE (decl
) = error_mark_node
;
4953 /* Create a new scope to hold this declaration if necessary.
4954 Whether or not a new scope is necessary cannot be determined
4955 until after the type has been completed; if the type is a
4956 specialization of a class template it is not until after
4957 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4958 will be set correctly. */
4959 maybe_push_cleanup_level (type
);
4962 /* Handle initialization of references. DECL, TYPE, and INIT have the
4963 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4964 but will be set to a new CLEANUP_STMT if a temporary is created
4965 that must be destroyed subsequently.
4967 Returns an initializer expression to use to initialize DECL, or
4968 NULL if the initialization can be performed statically.
4970 Quotes on semantics can be found in ARM 8.4.3. */
4973 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4975 if (init
== NULL_TREE
)
4977 if ((DECL_LANG_SPECIFIC (decl
) == 0
4978 || DECL_IN_AGGR_P (decl
) == 0)
4979 && ! DECL_THIS_EXTERN (decl
))
4980 error ("%qD declared as reference but not initialized", decl
);
4984 if (TREE_CODE (init
) == TREE_LIST
)
4985 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4986 tf_warning_or_error
);
4988 tree ttype
= TREE_TYPE (type
);
4989 if (TREE_CODE (ttype
) != ARRAY_TYPE
4990 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4991 /* Note: default conversion is only called in very special cases. */
4992 init
= decay_conversion (init
, tf_warning_or_error
);
4994 /* check_initializer handles this for non-reference variables, but for
4995 references we need to do it here or the initializer will get the
4996 incomplete array type and confuse later calls to
4997 cp_complete_array_type. */
4998 if (TREE_CODE (ttype
) == ARRAY_TYPE
4999 && TYPE_DOMAIN (ttype
) == NULL_TREE
5000 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
5001 || TREE_CODE (init
) == STRING_CST
))
5003 cp_complete_array_type (&ttype
, init
, false);
5004 if (ttype
!= TREE_TYPE (type
))
5005 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
5008 /* Convert INIT to the reference type TYPE. This may involve the
5009 creation of a temporary, whose lifetime must be the same as that
5010 of the reference. If so, a DECL_EXPR for the temporary will be
5011 added just after the DECL_EXPR for DECL. That's why we don't set
5012 DECL_INITIAL for local references (instead assigning to them
5013 explicitly); we need to allow the temporary to be initialized
5015 return initialize_reference (type
, init
, flags
,
5016 tf_warning_or_error
);
5019 /* Designated initializers in arrays are not supported in GNU C++.
5020 The parser cannot detect this error since it does not know whether
5021 a given brace-enclosed initializer is for a class type or for an
5022 array. This function checks that CE does not use a designated
5023 initializer. If it does, an error is issued. Returns true if CE
5024 is valid, i.e., does not have a designated initializer. */
5027 check_array_designated_initializer (constructor_elt
*ce
,
5028 unsigned HOST_WIDE_INT index
)
5030 /* Designated initializers for array elements are not supported. */
5033 /* The parser only allows identifiers as designated
5035 if (ce
->index
== error_mark_node
)
5037 error ("name used in a GNU-style designated "
5038 "initializer for an array");
5041 else if (identifier_p (ce
->index
))
5043 error ("name %qD used in a GNU-style designated "
5044 "initializer for an array", ce
->index
);
5048 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5051 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5052 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5055 /* A C99 designator is OK if it matches the current index. */
5056 if (wi::eq_p (ce_index
, index
))
5059 sorry ("non-trivial designated initializers not supported");
5062 error ("C99 designator %qE is not an integral constant-expression",
5071 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5072 array until we finish parsing the initializer. If that's the
5073 situation we're in, update DECL accordingly. */
5076 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5078 tree type
= TREE_TYPE (decl
);
5080 if (TREE_CODE (type
) == ARRAY_TYPE
5081 && TYPE_DOMAIN (type
) == NULL_TREE
5082 && TREE_CODE (decl
) != TYPE_DECL
)
5084 /* do_default is really a C-ism to deal with tentative definitions.
5085 But let's leave it here to ease the eventual merge. */
5086 int do_default
= !DECL_EXTERNAL (decl
);
5087 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5090 /* Check that there are no designated initializers in INIT, as
5091 those are not supported in GNU C++, and as the middle-end
5092 will crash if presented with a non-numeric designated
5094 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5096 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5097 constructor_elt
*ce
;
5099 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5100 if (!check_array_designated_initializer (ce
, i
))
5106 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5110 error ("initializer fails to determine size of %qD", decl
);
5112 else if (failure
== 2)
5116 error ("array size missing in %qD", decl
);
5118 /* If a `static' var's size isn't known, make it extern as
5119 well as static, so it does not get allocated. If it's not
5120 `static', then don't mark it extern; finish_incomplete_decl
5121 will give it a default size and it will get allocated. */
5122 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5123 DECL_EXTERNAL (decl
) = 1;
5125 else if (failure
== 3)
5127 error ("zero-size array %qD", decl
);
5131 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5133 relayout_decl (decl
);
5137 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5138 any appropriate error messages regarding the layout. */
5141 layout_var_decl (tree decl
)
5145 type
= TREE_TYPE (decl
);
5146 if (type
== error_mark_node
)
5149 /* If we haven't already laid out this declaration, do so now.
5150 Note that we must not call complete type for an external object
5151 because it's type might involve templates that we are not
5152 supposed to instantiate yet. (And it's perfectly valid to say
5153 `extern X x' for some incomplete type `X'.) */
5154 if (!DECL_EXTERNAL (decl
))
5155 complete_type (type
);
5156 if (!DECL_SIZE (decl
)
5157 && TREE_TYPE (decl
) != error_mark_node
5158 && (COMPLETE_TYPE_P (type
)
5159 || (TREE_CODE (type
) == ARRAY_TYPE
5160 && !TYPE_DOMAIN (type
)
5161 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5162 layout_decl (decl
, 0);
5164 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5166 /* An automatic variable with an incomplete type: that is an error.
5167 Don't talk about array types here, since we took care of that
5168 message in grokdeclarator. */
5169 error ("storage size of %qD isn%'t known", decl
);
5170 TREE_TYPE (decl
) = error_mark_node
;
5173 /* Keep this code around in case we later want to control debug info
5174 based on whether a type is "used". (jason 1999-11-11) */
5176 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5177 /* Let debugger know it should output info for this type. */
5178 note_debug_info_needed (ttype
);
5180 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5181 note_debug_info_needed (DECL_CONTEXT (decl
));
5184 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5185 && DECL_SIZE (decl
) != NULL_TREE
5186 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5188 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5189 constant_expression_warning (DECL_SIZE (decl
));
5192 error ("storage size of %qD isn%'t constant", decl
);
5193 TREE_TYPE (decl
) = error_mark_node
;
5198 /* If a local static variable is declared in an inline function, or if
5199 we have a weak definition, we must endeavor to create only one
5200 instance of the variable at link-time. */
5203 maybe_commonize_var (tree decl
)
5205 /* Static data in a function with comdat linkage also has comdat
5207 if (TREE_STATIC (decl
)
5208 /* Don't mess with __FUNCTION__. */
5209 && ! DECL_ARTIFICIAL (decl
)
5210 && DECL_FUNCTION_SCOPE_P (decl
)
5211 && vague_linkage_p (DECL_CONTEXT (decl
)))
5215 /* With weak symbols, we simply make the variable COMDAT;
5216 that will cause copies in multiple translations units to
5218 comdat_linkage (decl
);
5222 if (DECL_INITIAL (decl
) == NULL_TREE
5223 || DECL_INITIAL (decl
) == error_mark_node
)
5225 /* Without weak symbols, we can use COMMON to merge
5226 uninitialized variables. */
5227 TREE_PUBLIC (decl
) = 1;
5228 DECL_COMMON (decl
) = 1;
5232 /* While for initialized variables, we must use internal
5233 linkage -- which means that multiple copies will not
5235 TREE_PUBLIC (decl
) = 0;
5236 DECL_COMMON (decl
) = 0;
5237 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5238 "sorry: semantics of inline function static "
5239 "data %q#D are wrong (you%'ll wind up "
5240 "with multiple copies)", decl
))
5241 inform (DECL_SOURCE_LOCATION (decl
),
5242 "you can work around this by removing the initializer");
5248 /* Issue an error message if DECL is an uninitialized const variable. */
5251 check_for_uninitialized_const_var (tree decl
)
5253 tree type
= strip_array_types (TREE_TYPE (decl
));
5255 /* ``Unless explicitly declared extern, a const object does not have
5256 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5259 && TREE_CODE (type
) != REFERENCE_TYPE
5260 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5261 && !DECL_INITIAL (decl
))
5263 tree field
= default_init_uninitialized_part (type
);
5267 if (CP_TYPE_CONST_P (type
))
5268 permerror (DECL_SOURCE_LOCATION (decl
),
5269 "uninitialized const %qD", decl
);
5272 error_at (DECL_SOURCE_LOCATION (decl
),
5273 "uninitialized variable %qD in %<constexpr%> function",
5275 cp_function_chain
->invalid_constexpr
= true;
5278 if (CLASS_TYPE_P (type
))
5280 tree defaulted_ctor
;
5282 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5283 "%q#T has no user-provided default constructor", type
);
5284 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5286 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5287 "constructor is not user-provided because it is "
5288 "explicitly defaulted in the class body");
5289 inform (0, "and the implicitly-defined constructor does not "
5290 "initialize %q+#D", field
);
5295 /* Structure holding the current initializer being processed by reshape_init.
5296 CUR is a pointer to the current element being processed, END is a pointer
5297 after the last element present in the initializer. */
5298 typedef struct reshape_iterator_t
5300 constructor_elt
*cur
;
5301 constructor_elt
*end
;
5304 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5306 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5307 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5308 initialized. If there are no more such fields, the return value
5312 next_initializable_field (tree field
)
5315 && (TREE_CODE (field
) != FIELD_DECL
5316 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5317 || DECL_ARTIFICIAL (field
)))
5318 field
= DECL_CHAIN (field
);
5323 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5324 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5325 INTEGER_CST representing the size of the array minus one (the maximum index),
5326 or NULL_TREE if the array was declared without specifying the size. D is
5327 the iterator within the constructor. */
5330 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5331 tsubst_flags_t complain
)
5334 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5335 unsigned HOST_WIDE_INT max_index_cst
= 0;
5336 unsigned HOST_WIDE_INT index
;
5338 /* The initializer for an array is always a CONSTRUCTOR. */
5339 new_init
= build_constructor (init_list_type_node
, NULL
);
5343 /* Minus 1 is used for zero sized arrays. */
5344 if (integer_all_onesp (max_index
))
5347 if (tree_fits_uhwi_p (max_index
))
5348 max_index_cst
= tree_to_uhwi (max_index
);
5349 /* sizetype is sign extended, not zero extended. */
5351 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5354 /* Loop until there are no more initializers. */
5356 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5360 constructor_elt
*old_cur
= d
->cur
;
5362 check_array_designated_initializer (d
->cur
, index
);
5363 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5365 if (elt_init
== error_mark_node
)
5366 return error_mark_node
;
5367 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5368 size_int (index
), elt_init
);
5369 if (!TREE_CONSTANT (elt_init
))
5370 TREE_CONSTANT (new_init
) = false;
5372 /* This can happen with an invalid initializer (c++/54501). */
5373 if (d
->cur
== old_cur
&& !sized_array_p
)
5380 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5381 Parameters are the same of reshape_init_r. */
5384 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5386 tree max_index
= NULL_TREE
;
5388 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5390 if (TYPE_DOMAIN (type
))
5391 max_index
= array_type_nelts (type
);
5393 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5396 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5397 Parameters are the same of reshape_init_r. */
5400 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5402 tree max_index
= NULL_TREE
;
5404 gcc_assert (VECTOR_TYPE_P (type
));
5406 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5408 tree value
= d
->cur
->value
;
5409 if (!same_type_p (TREE_TYPE (value
), type
))
5411 if (complain
& tf_error
)
5412 error ("invalid type %qT as initializer for a vector of type %qT",
5413 TREE_TYPE (d
->cur
->value
), type
);
5414 value
= error_mark_node
;
5420 /* For a vector, we initialize it as an array of the appropriate size. */
5421 if (VECTOR_TYPE_P (type
))
5422 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5424 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5427 /* Subroutine of reshape_init_r, processes the initializers for classes
5428 or union. Parameters are the same of reshape_init_r. */
5431 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5432 tsubst_flags_t complain
)
5437 gcc_assert (CLASS_TYPE_P (type
));
5439 /* The initializer for a class is always a CONSTRUCTOR. */
5440 new_init
= build_constructor (init_list_type_node
, NULL
);
5441 field
= next_initializable_field (TYPE_FIELDS (type
));
5447 An initializer for an aggregate member that is an
5448 empty class shall have the form of an empty
5449 initializer-list {}. */
5450 if (!first_initializer_p
)
5452 if (complain
& tf_error
)
5453 error ("initializer for %qT must be brace-enclosed", type
);
5454 return error_mark_node
;
5459 /* Loop through the initializable fields, gathering initializers. */
5460 while (d
->cur
!= d
->end
)
5463 constructor_elt
*old_cur
= d
->cur
;
5465 /* Handle designated initializers, as an extension. */
5468 if (d
->cur
->index
== error_mark_node
)
5469 return error_mark_node
;
5471 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5472 /* We already reshaped this. */
5473 gcc_assert (d
->cur
->index
== field
);
5474 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5475 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5478 if (complain
& tf_error
)
5479 error ("%<[%E] =%> used in a GNU-style designated initializer"
5480 " for class %qT", d
->cur
->index
, type
);
5481 return error_mark_node
;
5484 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5486 if (complain
& tf_error
)
5487 error ("%qT has no non-static data member named %qD", type
,
5489 return error_mark_node
;
5493 /* If we processed all the member of the class, we are done. */
5497 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5498 /*first_initializer_p=*/false, complain
);
5499 if (field_init
== error_mark_node
)
5500 return error_mark_node
;
5502 if (d
->cur
== old_cur
&& d
->cur
->index
)
5504 /* This can happen with an invalid initializer for a flexible
5505 array member (c++/54441). */
5506 if (complain
& tf_error
)
5507 error ("invalid initializer for %q#D", field
);
5508 return error_mark_node
;
5511 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5515 When a union is initialized with a brace-enclosed
5516 initializer, the braces shall only contain an
5517 initializer for the first member of the union. */
5518 if (TREE_CODE (type
) == UNION_TYPE
)
5521 field
= next_initializable_field (DECL_CHAIN (field
));
5527 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5528 designators are not valid; either complain or return true to indicate
5529 that reshape_init_r should return error_mark_node. */
5532 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5536 if (complain
& tf_error
)
5537 error ("C99 designator %qE outside aggregate initializer",
5545 /* Subroutine of reshape_init, which processes a single initializer (part of
5546 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5547 iterator within the CONSTRUCTOR which points to the initializer to process.
5548 FIRST_INITIALIZER_P is true if this is the first initializer of the
5549 outermost CONSTRUCTOR node. */
5552 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5553 tsubst_flags_t complain
)
5555 tree init
= d
->cur
->value
;
5557 if (error_operand_p (init
))
5558 return error_mark_node
;
5560 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5561 && has_designator_problem (d
, complain
))
5562 return error_mark_node
;
5564 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5566 /* A complex type can be initialized from one or two initializers,
5567 but braces are not elided. */
5569 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5571 if (CONSTRUCTOR_NELTS (init
) > 2)
5573 if (complain
& tf_error
)
5574 error ("too many initializers for %qT", type
);
5576 return error_mark_node
;
5579 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5581 vec
<constructor_elt
, va_gc
> *v
= 0;
5582 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5583 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5584 if (has_designator_problem (d
, complain
))
5585 return error_mark_node
;
5587 init
= build_constructor (init_list_type_node
, v
);
5592 /* A non-aggregate type is always initialized with a single
5594 if (!CP_AGGREGATE_TYPE_P (type
))
5596 /* It is invalid to initialize a non-aggregate type with a
5597 brace-enclosed initializer before C++0x.
5598 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5599 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5600 a CONSTRUCTOR (with a record type). */
5601 if (TREE_CODE (init
) == CONSTRUCTOR
5602 /* Don't complain about a capture-init. */
5603 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5604 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5606 if (SCALAR_TYPE_P (type
))
5608 if (cxx_dialect
< cxx11
5609 /* Isn't value-initialization. */
5610 || CONSTRUCTOR_NELTS (init
) > 0)
5612 if (complain
& tf_error
)
5613 error ("braces around scalar initializer for type %qT",
5615 init
= error_mark_node
;
5619 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5626 /* "If T is a class type and the initializer list has a single element of
5627 type cv U, where U is T or a class derived from T, the object is
5628 initialized from that element." Even if T is an aggregate. */
5629 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5630 && first_initializer_p
5631 && d
->end
- d
->cur
== 1
5632 && reference_related_p (type
, TREE_TYPE (init
)))
5640 All implicit type conversions (clause _conv_) are considered when
5641 initializing the aggregate member with an initializer from an
5642 initializer-list. If the initializer can initialize a member,
5643 the member is initialized. Otherwise, if the member is itself a
5644 non-empty subaggregate, brace elision is assumed and the
5645 initializer is considered for the initialization of the first
5646 member of the subaggregate. */
5647 if (TREE_CODE (init
) != CONSTRUCTOR
5648 /* But don't try this for the first initializer, since that would be
5649 looking through the outermost braces; A a2 = { a1 }; is not a
5650 valid aggregate initialization. */
5651 && !first_initializer_p
5652 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5653 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5660 /* [dcl.init.string]
5662 A char array (whether plain char, signed char, or unsigned char)
5663 can be initialized by a string-literal (optionally enclosed in
5664 braces); a wchar_t array can be initialized by a wide
5665 string-literal (optionally enclosed in braces). */
5666 if (TREE_CODE (type
) == ARRAY_TYPE
5667 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5669 tree str_init
= init
;
5671 /* Strip one level of braces if and only if they enclose a single
5672 element (as allowed by [dcl.init.string]). */
5673 if (!first_initializer_p
5674 && TREE_CODE (str_init
) == CONSTRUCTOR
5675 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5677 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5680 /* If it's a string literal, then it's the initializer for the array
5681 as a whole. Otherwise, continue with normal initialization for
5682 array types (one value per array element). */
5683 if (TREE_CODE (str_init
) == STRING_CST
)
5685 if (has_designator_problem (d
, complain
))
5686 return error_mark_node
;
5692 /* The following cases are about aggregates. If we are not within a full
5693 initializer already, and there is not a CONSTRUCTOR, it means that there
5694 is a missing set of braces (that is, we are processing the case for
5695 which reshape_init exists). */
5696 if (!first_initializer_p
)
5698 if (TREE_CODE (init
) == CONSTRUCTOR
)
5700 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5701 /* There is no need to reshape pointer-to-member function
5702 initializers, as they are always constructed correctly
5703 by the front end. */
5705 else if (COMPOUND_LITERAL_P (init
))
5706 /* For a nested compound literal, there is no need to reshape since
5707 brace elision is not allowed. Even if we decided to allow it,
5708 we should add a call to reshape_init in finish_compound_literal,
5709 before calling digest_init, so changing this code would still
5710 not be necessary. */
5711 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5715 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5716 return reshape_init (type
, init
, complain
);
5720 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5724 /* Dispatch to specialized routines. */
5725 if (CLASS_TYPE_P (type
))
5726 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5727 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5728 return reshape_init_array (type
, d
, complain
);
5729 else if (VECTOR_TYPE_P (type
))
5730 return reshape_init_vector (type
, d
, complain
);
5735 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5736 brace-enclosed aggregate initializer.
5738 INIT is the CONSTRUCTOR containing the list of initializers describing
5739 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5740 It may not presently match the shape of the TYPE; for example:
5742 struct S { int a; int b; };
5743 struct S a[] = { 1, 2, 3, 4 };
5745 Here INIT will hold a vector of four elements, rather than a
5746 vector of two elements, each itself a vector of two elements. This
5747 routine transforms INIT from the former form into the latter. The
5748 revised CONSTRUCTOR node is returned. */
5751 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5753 vec
<constructor_elt
, va_gc
> *v
;
5757 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5759 v
= CONSTRUCTOR_ELTS (init
);
5761 /* An empty constructor does not need reshaping, and it is always a valid
5763 if (vec_safe_is_empty (v
))
5766 /* Recurse on this CONSTRUCTOR. */
5768 d
.end
= d
.cur
+ v
->length ();
5770 new_init
= reshape_init_r (type
, &d
, true, complain
);
5771 if (new_init
== error_mark_node
)
5772 return error_mark_node
;
5774 /* Make sure all the element of the constructor were used. Otherwise,
5775 issue an error about exceeding initializers. */
5778 if (complain
& tf_error
)
5779 error ("too many initializers for %qT", type
);
5781 return error_mark_node
;
5787 /* Verify array initializer. Returns true if errors have been reported. */
5790 check_array_initializer (tree decl
, tree type
, tree init
)
5792 tree element_type
= TREE_TYPE (type
);
5794 /* The array type itself need not be complete, because the
5795 initializer may tell us how many elements are in the array.
5796 But, the elements of the array must be complete. */
5797 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5800 error ("elements of array %q#D have incomplete type", decl
);
5802 error ("elements of array %q#T have incomplete type", type
);
5805 /* A compound literal can't have variable size. */
5807 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5808 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5810 error ("variable-sized compound literal");
5816 /* Subroutine of check_initializer; args are passed down from that function.
5817 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5820 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5823 gcc_assert (stmts_are_full_exprs_p ());
5824 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5827 /* Verify INIT (the initializer for DECL), and record the
5828 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5829 grok_reference_init.
5831 If the return value is non-NULL, it is an expression that must be
5832 evaluated dynamically to initialize DECL. */
5835 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5837 tree type
= TREE_TYPE (decl
);
5838 tree init_code
= NULL
;
5841 /* Things that are going to be initialized need to have complete
5843 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5845 if (DECL_HAS_VALUE_EXPR_P (decl
))
5847 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5848 it doesn't have storage to be initialized. */
5849 gcc_assert (init
== NULL_TREE
);
5853 if (type
== error_mark_node
)
5854 /* We will have already complained. */
5857 if (TREE_CODE (type
) == ARRAY_TYPE
)
5859 if (check_array_initializer (decl
, type
, init
))
5862 else if (!COMPLETE_TYPE_P (type
))
5864 error ("%q#D has incomplete type", decl
);
5865 TREE_TYPE (decl
) = error_mark_node
;
5869 /* There is no way to make a variable-sized class type in GNU C++. */
5870 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5872 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5874 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5875 if (SCALAR_TYPE_P (type
))
5879 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5880 init
= build_zero_init (type
, NULL_TREE
, false);
5882 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5884 error ("scalar object %qD requires one element in initializer",
5886 TREE_TYPE (decl
) = error_mark_node
;
5892 if (TREE_CODE (decl
) == CONST_DECL
)
5894 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5896 DECL_INITIAL (decl
) = init
;
5898 gcc_assert (init
!= NULL_TREE
);
5901 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5903 else if (init
|| type_build_ctor_call (type
)
5904 || TREE_CODE (type
) == REFERENCE_TYPE
)
5906 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5908 init
= grok_reference_init (decl
, type
, init
, flags
);
5909 flags
|= LOOKUP_ALREADY_DIGESTED
;
5912 check_for_uninitialized_const_var (decl
);
5913 /* Do not reshape constructors of vectors (they don't need to be
5915 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5917 if (is_std_init_list (type
))
5919 init
= perform_implicit_conversion (type
, init
,
5920 tf_warning_or_error
);
5921 flags
|= LOOKUP_ALREADY_DIGESTED
;
5923 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5925 /* Don't reshape if the class has constructors. */
5926 if (cxx_dialect
== cxx98
)
5927 error ("in C++98 %qD must be initialized by constructor, "
5931 else if (VECTOR_TYPE_P (type
) && TYPE_VECTOR_OPAQUE (type
))
5933 error ("opaque vector types cannot be initialized");
5934 init
= error_mark_node
;
5938 init
= reshape_init (type
, init
, tf_warning_or_error
);
5939 flags
|= LOOKUP_NO_NARROWING
;
5942 else if (TREE_CODE (init
) == TREE_LIST
5943 && TREE_TYPE (init
) != unknown_type_node
5944 && !MAYBE_CLASS_TYPE_P (type
))
5946 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5948 /* We get here with code like `int a (2);' */
5949 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5950 tf_warning_or_error
);
5953 /* If DECL has an array type without a specific bound, deduce the
5954 array size from the initializer. */
5955 maybe_deduce_size_from_array_init (decl
, init
);
5956 type
= TREE_TYPE (decl
);
5957 if (type
== error_mark_node
)
5960 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5961 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5962 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5963 && CP_AGGREGATE_TYPE_P (type
)
5964 && (CLASS_TYPE_P (type
)
5965 || !TYPE_NEEDS_CONSTRUCTING (type
)
5966 || type_has_extended_temps (type
))))
5968 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5970 /* A constructor call is a non-trivial initializer even if
5971 it isn't explicitly written. */
5972 if (TREE_SIDE_EFFECTS (init_code
))
5973 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5975 /* If this is a constexpr initializer, expand_default_init will
5976 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5977 case, pull the initializer back out and pass it down into
5978 store_init_value. */
5979 while (TREE_CODE (init_code
) == EXPR_STMT
5980 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5981 init_code
= TREE_OPERAND (init_code
, 0);
5982 if (TREE_CODE (init_code
) == INIT_EXPR
)
5984 init
= TREE_OPERAND (init_code
, 1);
5985 init_code
= NULL_TREE
;
5986 /* Don't call digest_init; it's unnecessary and will complain
5987 about aggregate initialization of non-aggregate classes. */
5988 flags
|= LOOKUP_ALREADY_DIGESTED
;
5990 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5992 /* Declared constexpr, but no suitable initializer; massage
5993 init appropriately so we can pass it into store_init_value
5995 if (CLASS_TYPE_P (type
)
5996 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5998 init
= build_functional_cast (type
, init
, tf_none
);
5999 if (TREE_CODE (init
) == TARGET_EXPR
)
6000 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
6002 init_code
= NULL_TREE
;
6008 if (init
&& TREE_CODE (init
) != TREE_VEC
)
6010 /* In aggregate initialization of a variable, each element
6011 initialization is a full-expression because there is no
6012 enclosing expression. */
6013 gcc_assert (stmts_are_full_exprs_p ());
6015 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
6017 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
6018 && DECL_INITIAL (decl
)
6019 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
6020 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
6021 warning (0, "array %qD initialized by parenthesized string literal %qE",
6022 decl
, DECL_INITIAL (decl
));
6028 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
6029 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
6030 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
6031 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
6034 check_for_uninitialized_const_var (decl
);
6037 if (init
&& init
!= error_mark_node
)
6038 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
6042 /* We might have set these in cp_finish_decl. */
6043 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
6044 TREE_CONSTANT (decl
) = false;
6047 if (init_code
&& DECL_IN_AGGR_P (decl
))
6049 static int explained
= 0;
6051 if (cxx_dialect
< cxx11
)
6052 error ("initializer invalid for static member with constructor");
6054 error ("non-constant in-class initialization invalid for static "
6055 "member %qD", decl
);
6058 inform (input_location
,
6059 "(an out of class initialization is required)");
6068 /* If DECL is not a local variable, give it RTL. */
6071 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6073 int toplev
= toplevel_bindings_p ();
6076 /* Set the DECL_ASSEMBLER_NAME for the object. */
6079 /* The `register' keyword, when used together with an
6080 asm-specification, indicates that the variable should be
6081 placed in a particular register. */
6082 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6084 set_user_assembler_name (decl
, asmspec
);
6085 DECL_HARD_REGISTER (decl
) = 1;
6089 if (TREE_CODE (decl
) == FUNCTION_DECL
6090 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6091 set_builtin_user_assembler_name (decl
, asmspec
);
6092 set_user_assembler_name (decl
, asmspec
);
6096 /* Handle non-variables up front. */
6099 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6103 /* If we see a class member here, it should be a static data
6105 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6107 gcc_assert (TREE_STATIC (decl
));
6108 /* An in-class declaration of a static data member should be
6109 external; it is only a declaration, and not a definition. */
6110 if (init
== NULL_TREE
)
6111 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6114 /* We don't create any RTL for local variables. */
6115 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6118 /* We defer emission of local statics until the corresponding
6119 DECL_EXPR is expanded. */
6120 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6122 /* Defer template instantiations. */
6123 if (DECL_LANG_SPECIFIC (decl
)
6124 && DECL_IMPLICIT_INSTANTIATION (decl
))
6127 /* If we're not deferring, go ahead and assemble the variable. */
6129 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6132 /* walk_tree helper for wrap_temporary_cleanups, below. */
6135 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6137 /* Stop at types or full-expression boundaries. */
6138 if (TYPE_P (*stmt_p
)
6139 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6145 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6147 tree guard
= (tree
)data
;
6148 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6150 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6151 /* Tell honor_protect_cleanup_actions to handle this as a separate
6153 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6155 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6161 /* We're initializing a local variable which has a cleanup GUARD. If there
6162 are any temporaries used in the initializer INIT of this variable, we
6163 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6164 variable will be cleaned up properly if one of them throws.
6166 Unfortunately, there's no way to express this properly in terms of
6167 nesting, as the regions for the temporaries overlap the region for the
6168 variable itself; if there are two temporaries, the variable needs to be
6169 the first thing destroyed if either of them throws. However, we only
6170 want to run the variable's cleanup if it actually got constructed. So
6171 we need to guard the temporary cleanups with the variable's cleanup if
6172 they are run on the normal path, but not if they are run on the
6173 exceptional path. We implement this by telling
6174 honor_protect_cleanup_actions to strip the variable cleanup from the
6175 exceptional path. */
6178 wrap_temporary_cleanups (tree init
, tree guard
)
6180 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6183 /* Generate code to initialize DECL (a local variable). */
6186 initialize_local_var (tree decl
, tree init
)
6188 tree type
= TREE_TYPE (decl
);
6192 gcc_assert (VAR_P (decl
)
6193 || TREE_CODE (decl
) == RESULT_DECL
);
6194 gcc_assert (!TREE_STATIC (decl
));
6196 if (DECL_SIZE (decl
) == NULL_TREE
)
6198 /* If we used it already as memory, it must stay in memory. */
6199 DECL_INITIAL (decl
) = NULL_TREE
;
6200 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6204 if (type
== error_mark_node
)
6207 /* Compute and store the initial value. */
6208 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6209 if (TREE_USED (type
))
6210 DECL_READ_P (decl
) = 1;
6212 /* Generate a cleanup, if necessary. */
6213 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6215 /* Perform the initialization. */
6218 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6219 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6220 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6222 /* Stick simple initializers in DECL_INITIAL so that
6223 -Wno-init-self works (c++/34772). */
6224 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6225 DECL_INITIAL (decl
) = rinit
;
6227 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6231 warning_at (DECL_SOURCE_LOCATION (decl
),
6233 "reference %qD is initialized with itself", decl
);
6238 int saved_stmts_are_full_exprs_p
;
6240 /* If we're only initializing a single object, guard the
6241 destructors of any temporaries used in its initializer with
6242 its destructor. This isn't right for arrays because each
6243 element initialization is a full-expression. */
6244 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6245 wrap_temporary_cleanups (init
, cleanup
);
6247 gcc_assert (building_stmt_list_p ());
6248 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6249 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6250 finish_expr_stmt (init
);
6251 current_stmt_tree ()->stmts_are_full_exprs_p
=
6252 saved_stmts_are_full_exprs_p
;
6256 /* Set this to 0 so we can tell whether an aggregate which was
6257 initialized was ever used. Don't do this if it has a
6258 destructor, so we don't complain about the 'resource
6259 allocation is initialization' idiom. Now set
6260 attribute((unused)) on types so decls of that type will be
6261 marked used. (see TREE_USED, above.) */
6262 if (TYPE_NEEDS_CONSTRUCTING (type
)
6264 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6265 && DECL_NAME (decl
))
6266 TREE_USED (decl
) = 0;
6267 else if (already_used
)
6268 TREE_USED (decl
) = 1;
6271 finish_decl_cleanup (decl
, cleanup
);
6274 /* DECL is a VAR_DECL for a compiler-generated variable with static
6275 storage duration (like a virtual table) whose initializer is a
6276 compile-time constant. Initialize the variable and provide it to the
6280 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6283 gcc_assert (DECL_ARTIFICIAL (decl
));
6284 init
= build_constructor (TREE_TYPE (decl
), v
);
6285 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6286 DECL_INITIAL (decl
) = init
;
6287 DECL_INITIALIZED_P (decl
) = 1;
6288 determine_visibility (decl
);
6289 layout_var_decl (decl
);
6290 maybe_commonize_var (decl
);
6291 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6294 /* INIT is the initializer for a variable, as represented by the
6295 parser. Returns true iff INIT is type-dependent. */
6298 type_dependent_init_p (tree init
)
6300 if (TREE_CODE (init
) == TREE_LIST
)
6301 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6302 return any_type_dependent_elements_p (init
);
6303 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6304 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6306 vec
<constructor_elt
, va_gc
> *elts
;
6310 elts
= CONSTRUCTOR_ELTS (init
);
6311 nelts
= vec_safe_length (elts
);
6312 for (i
= 0; i
< nelts
; ++i
)
6313 if (type_dependent_init_p ((*elts
)[i
].value
))
6317 /* It must be a simple expression, e.g., int i = 3; */
6318 return type_dependent_expression_p (init
);
6323 /* INIT is the initializer for a variable, as represented by the
6324 parser. Returns true iff INIT is value-dependent. */
6327 value_dependent_init_p (tree init
)
6329 if (TREE_CODE (init
) == TREE_LIST
)
6330 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6331 return any_value_dependent_elements_p (init
);
6332 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6333 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6335 vec
<constructor_elt
, va_gc
> *elts
;
6339 elts
= CONSTRUCTOR_ELTS (init
);
6340 nelts
= vec_safe_length (elts
);
6341 for (i
= 0; i
< nelts
; ++i
)
6342 if (value_dependent_init_p ((*elts
)[i
].value
))
6346 /* It must be a simple expression, e.g., int i = 3; */
6347 return value_dependent_expression_p (init
);
6352 /* Finish processing of a declaration;
6353 install its line number and initial value.
6354 If the length of an array type is not known before,
6355 it must be determined now, from the initial value, or it is an error.
6357 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6358 true, then INIT is an integral constant expression.
6360 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6361 if the (init) syntax was used. */
6364 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6365 tree asmspec_tree
, int flags
)
6368 vec
<tree
, va_gc
> *cleanups
= NULL
;
6369 const char *asmspec
= NULL
;
6370 int was_readonly
= 0;
6371 bool var_definition_p
= false;
6374 if (decl
== error_mark_node
)
6379 error ("assignment (not initialization) in declaration");
6383 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6384 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6385 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6387 type
= TREE_TYPE (decl
);
6388 if (type
== error_mark_node
)
6391 /* If a name was specified, get the string. */
6392 if (at_namespace_scope_p ())
6393 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6394 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6395 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6397 if (current_class_type
6398 && CP_DECL_CONTEXT (decl
) == current_class_type
6399 && TYPE_BEING_DEFINED (current_class_type
)
6400 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6401 && (DECL_INITIAL (decl
) || init
))
6402 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6404 if (TREE_CODE (decl
) != FUNCTION_DECL
6405 && (auto_node
= type_uses_auto (type
)))
6408 if (init
== NULL_TREE
)
6410 if (DECL_LANG_SPECIFIC (decl
)
6411 && DECL_TEMPLATE_INSTANTIATION (decl
)
6412 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6414 /* init is null because we're deferring instantiating the
6415 initializer until we need it. Well, we need it now. */
6416 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6420 error ("declaration of %q#D has no initializer", decl
);
6421 TREE_TYPE (decl
) = error_mark_node
;
6425 if (TREE_CODE (d_init
) == TREE_LIST
)
6426 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6427 tf_warning_or_error
);
6428 d_init
= resolve_nondeduced_context (d_init
);
6429 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6431 if (type
== error_mark_node
)
6433 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6436 if (!ensure_literal_type_for_constexpr_object (decl
))
6437 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6440 && DECL_CLASS_SCOPE_P (decl
)
6441 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6442 check_static_variable_definition (decl
, type
);
6444 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6447 if (init
== ridpointers
[(int)RID_DELETE
])
6449 /* FIXME check this is 1st decl. */
6450 DECL_DELETED_FN (decl
) = 1;
6451 DECL_DECLARED_INLINE_P (decl
) = 1;
6452 DECL_INITIAL (decl
) = error_mark_node
;
6453 FOR_EACH_CLONE (clone
, decl
)
6455 DECL_DELETED_FN (clone
) = 1;
6456 DECL_DECLARED_INLINE_P (clone
) = 1;
6457 DECL_INITIAL (clone
) = error_mark_node
;
6461 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6463 if (defaultable_fn_check (decl
))
6464 DECL_DEFAULTED_FN (decl
) = 1;
6466 DECL_INITIAL (decl
) = NULL_TREE
;
6470 if (init
&& VAR_P (decl
))
6472 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6473 /* If DECL is a reference, then we want to know whether init is a
6474 reference constant; init_const_expr_p as passed tells us whether
6475 it's an rvalue constant. */
6476 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6477 init_const_expr_p
= potential_constant_expression (init
);
6478 if (init_const_expr_p
)
6480 /* Set these flags now for templates. We'll update the flags in
6481 store_init_value for instantiations. */
6482 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6483 if (decl_maybe_constant_var_p (decl
))
6484 TREE_CONSTANT (decl
) = 1;
6488 if (processing_template_decl
)
6490 bool type_dependent_p
;
6492 /* Add this declaration to the statement-tree. */
6493 if (at_function_scope_p ())
6494 add_decl_expr (decl
);
6496 type_dependent_p
= dependent_type_p (type
);
6498 if (check_for_bare_parameter_packs (init
))
6501 DECL_INITIAL (decl
) = NULL_TREE
;
6504 /* Generally, initializers in templates are expanded when the
6505 template is instantiated. But, if DECL is a variable constant
6506 then it can be used in future constant expressions, so its value
6507 must be available. */
6509 if (!VAR_P (decl
) || dependent_type_p (type
))
6510 /* We can't do anything if the decl has dependent type. */;
6512 && init_const_expr_p
6513 && !type_dependent_p
6514 && TREE_CODE (type
) != REFERENCE_TYPE
6515 && decl_maybe_constant_var_p (decl
)
6516 && !type_dependent_init_p (init
)
6517 && !value_dependent_init_p (init
))
6519 /* This variable seems to be a non-dependent constant, so process
6520 its initializer. If check_initializer returns non-null the
6521 initialization wasn't constant after all. */
6523 cleanups
= make_tree_vector ();
6524 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6525 if (init_code
== NULL_TREE
)
6527 release_tree_vector (cleanups
);
6529 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6531 /* Deduce array size even if the initializer is dependent. */
6532 maybe_deduce_size_from_array_init (decl
, init
);
6533 /* And complain about multiple initializers. */
6534 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6535 && !MAYBE_CLASS_TYPE_P (type
))
6536 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6537 tf_warning_or_error
);
6541 DECL_INITIAL (decl
) = init
;
6545 /* Just store non-static data member initializers for later. */
6546 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6547 DECL_INITIAL (decl
) = init
;
6549 /* Take care of TYPE_DECLs up front. */
6550 if (TREE_CODE (decl
) == TYPE_DECL
)
6552 if (type
!= error_mark_node
6553 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6555 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6556 warning (0, "shadowing previous type declaration of %q#D", decl
);
6557 set_identifier_type_value (DECL_NAME (decl
), decl
);
6560 /* If we have installed this as the canonical typedef for this
6561 type, and that type has not been defined yet, delay emitting
6562 the debug information for it, as we will emit it later. */
6563 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6564 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6565 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6567 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6572 /* A reference will be modified here, as it is initialized. */
6573 if (! DECL_EXTERNAL (decl
)
6574 && TREE_READONLY (decl
)
6575 && TREE_CODE (type
) == REFERENCE_TYPE
)
6578 TREE_READONLY (decl
) = 0;
6583 /* If this is a local variable that will need a mangled name,
6584 register it now. We must do this before processing the
6585 initializer for the variable, since the initialization might
6586 require a guard variable, and since the mangled name of the
6587 guard variable will depend on the mangled name of this
6589 if (DECL_FUNCTION_SCOPE_P (decl
)
6590 && TREE_STATIC (decl
)
6591 && !DECL_ARTIFICIAL (decl
))
6593 push_local_name (decl
);
6594 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6595 || DECL_DESTRUCTOR_P (current_function_decl
))
6596 /* Normally local_decls is populated during GIMPLE lowering,
6597 but [cd]tors are never actually compiled directly. We need
6598 to put statics on the list so we can deal with the label
6599 address extension. FIXME. */
6600 add_local_decl (cfun
, decl
);
6603 /* Convert the initializer to the type of DECL, if we have not
6604 already initialized DECL. */
6605 if (!DECL_INITIALIZED_P (decl
)
6606 /* If !DECL_EXTERNAL then DECL is being defined. In the
6607 case of a static data member initialized inside the
6608 class-specifier, there can be an initializer even if DECL
6609 is *not* defined. */
6610 && (!DECL_EXTERNAL (decl
) || init
))
6612 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6615 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6616 /* Allow libjava/prims.cc define primitive classes. */
6617 if (init
!= NULL_TREE
6618 || jclass
== NULL_TREE
6619 || TREE_CODE (jclass
) != TYPE_DECL
6620 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6621 || !same_type_ignoring_top_level_qualifiers_p
6622 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6623 error ("Java object %qD not allocated with %<new%>", decl
);
6626 cleanups
= make_tree_vector ();
6627 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6633 The memory occupied by any object of static storage
6634 duration is zero-initialized at program startup before
6635 any other initialization takes place.
6637 We cannot create an appropriate initializer until after
6638 the type of DECL is finalized. If DECL_INITIAL is set,
6639 then the DECL is statically initialized, and any
6640 necessary zero-initialization has already been performed. */
6641 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6642 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6643 /*nelts=*/NULL_TREE
,
6644 /*static_storage_p=*/true);
6645 /* Remember that the initialization for this variable has
6647 DECL_INITIALIZED_P (decl
) = 1;
6648 /* This declaration is the definition of this variable,
6649 unless we are initializing a static data member within
6650 the class specifier. */
6651 if (!DECL_EXTERNAL (decl
))
6652 var_definition_p
= true;
6654 /* If the variable has an array type, lay out the type, even if
6655 there is no initializer. It is valid to index through the
6656 array, and we must get TYPE_ALIGN set correctly on the array
6658 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6661 if (TREE_STATIC (decl
)
6662 && !at_function_scope_p ()
6663 && current_function_decl
== NULL
)
6664 /* So decl is a global variable or a static member of a
6665 non local class. Record the types it uses
6666 so that we can decide later to emit debug info for them. */
6667 record_types_used_by_current_var_decl (decl
);
6669 else if (TREE_CODE (decl
) == FIELD_DECL
6670 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6671 error ("non-static data member %qD has Java class type", decl
);
6673 /* Add this declaration to the statement-tree. This needs to happen
6674 after the call to check_initializer so that the DECL_EXPR for a
6675 reference temp is added before the DECL_EXPR for the reference itself. */
6676 if (DECL_FUNCTION_SCOPE_P (decl
))
6678 /* If we're building a variable sized type, and we might be
6679 reachable other than via the top of the current binding
6680 level, then create a new BIND_EXPR so that we deallocate
6681 the object at the right time. */
6684 && !TREE_CONSTANT (DECL_SIZE (decl
))
6685 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6688 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6689 TREE_SIDE_EFFECTS (bind
) = 1;
6691 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6693 add_decl_expr (decl
);
6696 /* Let the middle end know about variables and functions -- but not
6697 static data members in uninstantiated class templates. */
6698 if (VAR_OR_FUNCTION_DECL_P (decl
))
6702 layout_var_decl (decl
);
6703 maybe_commonize_var (decl
);
6706 /* This needs to happen after the linkage is set. */
6707 determine_visibility (decl
);
6709 if (var_definition_p
&& TREE_STATIC (decl
))
6711 /* If a TREE_READONLY variable needs initialization
6712 at runtime, it is no longer readonly and we need to
6713 avoid MEM_READONLY_P being set on RTL created for it. */
6716 if (TREE_READONLY (decl
))
6717 TREE_READONLY (decl
) = 0;
6720 else if (was_readonly
)
6721 TREE_READONLY (decl
) = 1;
6723 /* Likewise if it needs destruction. */
6724 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6725 TREE_READONLY (decl
) = 0;
6728 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6730 /* Check for abstractness of the type. Notice that there is no
6731 need to strip array types here since the check for those types
6732 is already done within create_array_type_for_decl. */
6733 abstract_virtuals_error (decl
, type
);
6735 if (TREE_TYPE (decl
) == error_mark_node
)
6736 /* No initialization required. */
6738 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6742 if (init
== ridpointers
[(int)RID_DEFAULT
])
6744 /* An out-of-class default definition is defined at
6745 the point where it is explicitly defaulted. */
6746 if (DECL_DELETED_FN (decl
))
6747 maybe_explain_implicit_delete (decl
);
6748 else if (DECL_INITIAL (decl
) == error_mark_node
)
6749 synthesize_method (decl
);
6752 error ("function %q#D is initialized like a variable", decl
);
6754 /* else no initialization required. */
6756 else if (DECL_EXTERNAL (decl
)
6757 && ! (DECL_LANG_SPECIFIC (decl
)
6758 && DECL_NOT_REALLY_EXTERN (decl
)))
6761 DECL_INITIAL (decl
) = init
;
6763 /* A variable definition. */
6764 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6765 /* Initialize the local variable. */
6766 initialize_local_var (decl
, init
);
6768 /* If a variable is defined, and then a subsequent
6769 definition with external linkage is encountered, we will
6770 get here twice for the same variable. We want to avoid
6771 calling expand_static_init more than once. For variables
6772 that are not static data members, we can call
6773 expand_static_init only when we actually process the
6774 initializer. It is not legal to redeclare a static data
6775 member, so this issue does not arise in that case. */
6776 else if (var_definition_p
&& TREE_STATIC (decl
))
6777 expand_static_init (decl
, init
);
6780 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6781 reference, insert it in the statement-tree now. */
6785 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6786 push_cleanup (decl
, t
, false);
6787 release_tree_vector (cleanups
);
6791 TREE_READONLY (decl
) = 1;
6793 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6796 /* Returns a declaration for a VAR_DECL as if:
6798 extern "C" TYPE NAME;
6800 had been seen. Used to create compiler-generated global
6804 declare_global_var (tree name
, tree type
)
6808 push_to_top_level ();
6809 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6810 TREE_PUBLIC (decl
) = 1;
6811 DECL_EXTERNAL (decl
) = 1;
6812 DECL_ARTIFICIAL (decl
) = 1;
6813 /* If the user has explicitly declared this variable (perhaps
6814 because the code we are compiling is part of a low-level runtime
6815 library), then it is possible that our declaration will be merged
6816 with theirs by pushdecl. */
6817 decl
= pushdecl (decl
);
6818 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6819 pop_from_top_level ();
6824 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6825 if "__cxa_atexit" is not being used) corresponding to the function
6826 to be called when the program exits. */
6829 get_atexit_fn_ptr_type (void)
6833 if (!atexit_fn_ptr_type_node
)
6836 if (flag_use_cxa_atexit
6837 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6838 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6839 arg_type
= ptr_type_node
;
6841 /* The parameter to "atexit" is "void (*)(void)". */
6842 arg_type
= NULL_TREE
;
6844 fn_type
= build_function_type_list (void_type_node
,
6845 arg_type
, NULL_TREE
);
6846 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6849 return atexit_fn_ptr_type_node
;
6852 /* Returns a pointer to the `atexit' function. Note that if
6853 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6854 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6857 get_atexit_node (void)
6863 bool use_aeabi_atexit
;
6868 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6870 /* The declaration for `__cxa_atexit' is:
6872 int __cxa_atexit (void (*)(void *), void *, void *)
6874 We build up the argument types and then the function type
6876 tree argtype0
, argtype1
, argtype2
;
6878 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6879 /* First, build the pointer-to-function type for the first
6881 fn_ptr_type
= get_atexit_fn_ptr_type ();
6882 /* Then, build the rest of the argument types. */
6883 argtype2
= ptr_type_node
;
6884 if (use_aeabi_atexit
)
6886 argtype1
= fn_ptr_type
;
6887 argtype0
= ptr_type_node
;
6891 argtype1
= ptr_type_node
;
6892 argtype0
= fn_ptr_type
;
6894 /* And the final __cxa_atexit type. */
6895 fn_type
= build_function_type_list (integer_type_node
,
6896 argtype0
, argtype1
, argtype2
,
6898 if (use_aeabi_atexit
)
6899 name
= "__aeabi_atexit";
6901 name
= "__cxa_atexit";
6905 /* The declaration for `atexit' is:
6907 int atexit (void (*)());
6909 We build up the argument types and then the function type
6911 fn_ptr_type
= get_atexit_fn_ptr_type ();
6912 /* Build the final atexit type. */
6913 fn_type
= build_function_type_list (integer_type_node
,
6914 fn_ptr_type
, NULL_TREE
);
6918 /* Now, build the function declaration. */
6919 push_lang_context (lang_name_c
);
6920 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6921 mark_used (atexit_fndecl
);
6922 pop_lang_context ();
6923 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6928 /* Like get_atexit_node, but for thread-local cleanups. */
6931 get_thread_atexit_node (void)
6933 /* The declaration for `__cxa_thread_atexit' is:
6935 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6936 tree fn_type
= build_function_type_list (integer_type_node
,
6937 get_atexit_fn_ptr_type (),
6938 ptr_type_node
, ptr_type_node
,
6941 /* Now, build the function declaration. */
6942 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6943 ECF_LEAF
| ECF_NOTHROW
);
6944 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6947 /* Returns the __dso_handle VAR_DECL. */
6950 get_dso_handle_node (void)
6952 if (dso_handle_node
)
6953 return dso_handle_node
;
6955 /* Declare the variable. */
6956 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6959 #ifdef HAVE_GAS_HIDDEN
6960 if (dso_handle_node
!= error_mark_node
)
6962 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6963 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6967 return dso_handle_node
;
6970 /* Begin a new function with internal linkage whose job will be simply
6971 to destroy some particular variable. */
6973 static GTY(()) int start_cleanup_cnt
;
6976 start_cleanup_fn (void)
6981 bool use_cxa_atexit
= flag_use_cxa_atexit
6982 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6984 push_to_top_level ();
6986 /* No need to mangle this. */
6987 push_lang_context (lang_name_c
);
6989 /* Build the name of the function. */
6990 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6991 /* Build the function declaration. */
6992 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6993 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6994 /* It's a function with internal linkage, generated by the
6996 TREE_PUBLIC (fndecl
) = 0;
6997 DECL_ARTIFICIAL (fndecl
) = 1;
6998 /* Make the function `inline' so that it is only emitted if it is
6999 actually needed. It is unlikely that it will be inlined, since
7000 it is only called via a function pointer, but we avoid unnecessary
7001 emissions this way. */
7002 DECL_DECLARED_INLINE_P (fndecl
) = 1;
7003 DECL_INTERFACE_KNOWN (fndecl
) = 1;
7004 /* Build the parameter. */
7009 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
7010 DECL_CONTEXT (parmdecl
) = fndecl
;
7011 TREE_USED (parmdecl
) = 1;
7012 DECL_READ_P (parmdecl
) = 1;
7013 DECL_ARGUMENTS (fndecl
) = parmdecl
;
7017 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
7019 pop_lang_context ();
7021 return current_function_decl
;
7024 /* Finish the cleanup function begun by start_cleanup_fn. */
7027 end_cleanup_fn (void)
7029 expand_or_defer_fn (finish_function (0));
7031 pop_from_top_level ();
7034 /* Generate code to handle the destruction of DECL, an object with
7035 static storage duration. */
7038 register_dtor_fn (tree decl
)
7045 bool ob_parm
, dso_parm
, use_dtor
;
7046 tree arg0
, arg1
, arg2
;
7049 type
= TREE_TYPE (decl
);
7050 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7053 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7054 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7055 destructor to "__cxa_atexit"; we don't have to build a temporary
7056 function to do the cleanup. */
7057 dso_parm
= (flag_use_cxa_atexit
7058 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7059 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7060 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7065 /* Find the destructor. */
7066 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7067 gcc_assert (idx
>= 0);
7068 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7069 /* Make sure it is accessible. */
7070 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7071 tf_warning_or_error
);
7075 /* Call build_cleanup before we enter the anonymous function so
7076 that any access checks will be done relative to the current
7077 scope, rather than the scope of the anonymous function. */
7078 build_cleanup (decl
);
7080 /* Now start the function. */
7081 cleanup
= start_cleanup_fn ();
7083 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7084 to the original function, rather than the anonymous one. That
7085 will make the back end think that nested functions are in use,
7086 which causes confusion. */
7087 push_deferring_access_checks (dk_no_check
);
7088 fcall
= build_cleanup (decl
);
7089 pop_deferring_access_checks ();
7091 /* Create the body of the anonymous function. */
7092 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7093 finish_expr_stmt (fcall
);
7094 finish_compound_stmt (compound_stmt
);
7098 /* Call atexit with the cleanup function. */
7099 mark_used (cleanup
);
7100 cleanup
= build_address (cleanup
);
7102 if (DECL_THREAD_LOCAL_P (decl
))
7103 atex_node
= get_thread_atexit_node ();
7105 atex_node
= get_atexit_node ();
7109 /* We must convert CLEANUP to the type that "__cxa_atexit"
7111 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7112 /* "__cxa_atexit" will pass the address of DECL to the
7113 cleanup function. */
7115 addr
= build_address (decl
);
7116 /* The declared type of the parameter to "__cxa_atexit" is
7117 "void *". For plain "T*", we could just let the
7118 machinery in cp_build_function_call convert it -- but if the
7119 type is "cv-qualified T *", then we need to convert it
7120 before passing it in, to avoid spurious errors. */
7121 addr
= build_nop (ptr_type_node
, addr
);
7124 /* Since the cleanup functions we build ignore the address
7125 they're given, there's no reason to pass the actual address
7126 in, and, in general, it's cheaper to pass NULL than any
7128 addr
= null_pointer_node
;
7131 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7132 tf_warning_or_error
);
7134 /* Just pass NULL to the dso handle parm if we don't actually
7135 have a DSO handle on this target. */
7136 arg2
= null_pointer_node
;
7142 if (!DECL_THREAD_LOCAL_P (decl
)
7143 && targetm
.cxx
.use_aeabi_atexit ())
7159 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7160 arg0
, arg1
, arg2
, NULL_TREE
);
7163 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7164 is its initializer. Generate code to handle the construction
7165 and destruction of DECL. */
7168 expand_static_init (tree decl
, tree init
)
7170 gcc_assert (VAR_P (decl
));
7171 gcc_assert (TREE_STATIC (decl
));
7173 /* Some variables require no dynamic initialization. */
7174 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7176 /* Make sure the destructor is callable. */
7177 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7182 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7183 && !DECL_FUNCTION_SCOPE_P (decl
))
7186 error ("non-local variable %qD declared %<__thread%> "
7187 "needs dynamic initialization", decl
);
7189 error ("non-local variable %qD declared %<__thread%> "
7190 "has a non-trivial destructor", decl
);
7191 static bool informed
;
7194 inform (DECL_SOURCE_LOCATION (decl
),
7195 "C++11 %<thread_local%> allows dynamic initialization "
7202 if (DECL_FUNCTION_SCOPE_P (decl
))
7204 /* Emit code to perform this initialization but once. */
7205 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7206 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7207 tree guard
, guard_addr
;
7209 /* We don't need thread-safety code for thread-local vars. */
7210 bool thread_guard
= (flag_threadsafe_statics
7211 && !DECL_THREAD_LOCAL_P (decl
));
7213 /* Emit code to perform this initialization but once. This code
7216 static <type> guard;
7217 if (!__atomic_load (guard.first_byte)) {
7218 if (__cxa_guard_acquire (&guard)) {
7221 // Do initialization.
7222 flag = true; __cxa_guard_release (&guard);
7223 // Register variable for destruction at end of program.
7225 if (!flag) __cxa_guard_abort (&guard);
7229 Note that the `flag' variable is only set to 1 *after* the
7230 initialization is complete. This ensures that an exception,
7231 thrown during the construction, will cause the variable to
7232 reinitialized when we pass through this code again, as per:
7236 If the initialization exits by throwing an exception, the
7237 initialization is not complete, so it will be tried again
7238 the next time control enters the declaration.
7240 This process should be thread-safe, too; multiple threads
7241 should not be able to initialize the variable more than
7244 /* Create the guard variable. */
7245 guard
= get_guard (decl
);
7247 /* Begin the conditional initialization. */
7248 if_stmt
= begin_if_stmt ();
7250 finish_if_stmt_cond (get_guard_cond (guard
, thread_guard
), if_stmt
);
7251 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7255 tree vfntype
= NULL_TREE
;
7256 tree acquire_name
, release_name
, abort_name
;
7257 tree acquire_fn
, release_fn
, abort_fn
;
7258 guard_addr
= build_address (guard
);
7260 acquire_name
= get_identifier ("__cxa_guard_acquire");
7261 release_name
= get_identifier ("__cxa_guard_release");
7262 abort_name
= get_identifier ("__cxa_guard_abort");
7263 acquire_fn
= identifier_global_value (acquire_name
);
7264 release_fn
= identifier_global_value (release_name
);
7265 abort_fn
= identifier_global_value (abort_name
);
7267 acquire_fn
= push_library_fn
7268 (acquire_name
, build_function_type_list (integer_type_node
,
7269 TREE_TYPE (guard_addr
),
7271 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7272 if (!release_fn
|| !abort_fn
)
7273 vfntype
= build_function_type_list (void_type_node
,
7274 TREE_TYPE (guard_addr
),
7277 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7278 ECF_NOTHROW
| ECF_LEAF
);
7280 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7281 ECF_NOTHROW
| ECF_LEAF
);
7283 inner_if_stmt
= begin_if_stmt ();
7284 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7287 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7288 begin
= get_target_expr (boolean_false_node
);
7289 flag
= TARGET_EXPR_SLOT (begin
);
7291 TARGET_EXPR_CLEANUP (begin
)
7292 = build3 (COND_EXPR
, void_type_node
, flag
,
7294 build_call_n (abort_fn
, 1, guard_addr
));
7295 CLEANUP_EH_ONLY (begin
) = 1;
7297 /* Do the initialization itself. */
7298 init
= add_stmt_to_compound (begin
, init
);
7299 init
= add_stmt_to_compound
7300 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7301 init
= add_stmt_to_compound
7302 (init
, build_call_n (release_fn
, 1, guard_addr
));
7305 init
= add_stmt_to_compound (init
, set_guard (guard
));
7307 /* Use atexit to register a function for destroying this static
7309 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7311 finish_expr_stmt (init
);
7315 finish_compound_stmt (inner_then_clause
);
7316 finish_then_clause (inner_if_stmt
);
7317 finish_if_stmt (inner_if_stmt
);
7320 finish_compound_stmt (then_clause
);
7321 finish_then_clause (if_stmt
);
7322 finish_if_stmt (if_stmt
);
7324 else if (DECL_THREAD_LOCAL_P (decl
))
7325 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7327 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7331 /* Make TYPE a complete type based on INITIAL_VALUE.
7332 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7333 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7334 3 if the initializer list is empty (in pedantic mode). */
7337 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7340 tree type
, elt_type
;
7342 /* Don't get confused by a CONSTRUCTOR for some other type. */
7343 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7344 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7349 unsigned HOST_WIDE_INT i
;
7352 /* An array of character type can be initialized from a
7353 brace-enclosed string constant.
7355 FIXME: this code is duplicated from reshape_init. Probably
7356 we should just call reshape_init here? */
7357 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7358 && TREE_CODE (initial_value
) == CONSTRUCTOR
7359 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7361 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7362 tree value
= (*v
)[0].value
;
7364 if (TREE_CODE (value
) == STRING_CST
7365 && v
->length () == 1)
7366 initial_value
= value
;
7369 /* If any of the elements are parameter packs, we can't actually
7370 complete this type now because the array size is dependent. */
7371 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7373 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7376 if (PACK_EXPANSION_P (value
))
7382 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7384 /* We can create the array before the element type is complete, which
7385 means that we didn't have these two bits set in the original type
7386 either. In completing the type, we are expected to propagate these
7387 bits. See also complete_type which does the same thing for arrays
7390 if (TYPE_DOMAIN (type
))
7392 elt_type
= TREE_TYPE (type
);
7393 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7394 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7395 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7401 /* As above, but either give an error or reject zero-size arrays, depending
7405 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7406 bool do_default
, tsubst_flags_t complain
)
7409 bool sfinae
= !(complain
& tf_error
);
7410 /* In SFINAE context we can't be lenient about zero-size arrays. */
7413 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7419 /* Not an error. */;
7420 else if (failure
== 1)
7421 error ("initializer fails to determine size of %qT", *ptype
);
7422 else if (failure
== 2)
7425 error ("array size missing in %qT", *ptype
);
7427 else if (failure
== 3)
7428 error ("zero-size array %qT", *ptype
);
7429 *ptype
= error_mark_node
;
7434 /* Return zero if something is declared to be a member of type
7435 CTYPE when in the context of CUR_TYPE. STRING is the error
7436 message to print in that case. Otherwise, quietly return 1. */
7439 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7441 if (ctype
&& ctype
!= cur_type
)
7443 if (flags
== DTOR_FLAG
)
7444 error ("destructor for alien class %qT cannot be a member", ctype
);
7446 error ("constructor for alien class %qT cannot be a member", ctype
);
7452 /* Subroutine of `grokdeclarator'. */
7454 /* Generate errors possibly applicable for a given set of specifiers.
7455 This is for ARM $7.1.2. */
7458 bad_specifiers (tree object
,
7459 enum bad_spec_place type
,
7470 error ("%qD declared as a %<virtual%> variable", object
);
7472 error ("%qD declared as an %<inline%> variable", object
);
7474 error ("%<const%> and %<volatile%> function specifiers on "
7475 "%qD invalid in variable declaration", object
);
7479 error ("%qD declared as a %<virtual%> parameter", object
);
7481 error ("%qD declared as an %<inline%> parameter", object
);
7483 error ("%<const%> and %<volatile%> function specifiers on "
7484 "%qD invalid in parameter declaration", object
);
7488 error ("%qD declared as a %<virtual%> type", object
);
7490 error ("%qD declared as an %<inline%> type", object
);
7492 error ("%<const%> and %<volatile%> function specifiers on "
7493 "%qD invalid in type declaration", object
);
7497 error ("%qD declared as a %<virtual%> field", object
);
7499 error ("%qD declared as an %<inline%> field", object
);
7501 error ("%<const%> and %<volatile%> function specifiers on "
7502 "%qD invalid in field declaration", object
);
7508 error ("%q+D declared as a friend", object
);
7510 && (TREE_CODE (object
) == TYPE_DECL
7511 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7512 && !TYPE_REFFN_P (TREE_TYPE (object
))
7513 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7514 error ("%q+D declared with an exception specification", object
);
7517 /* DECL is a member function or static data member and is presently
7518 being defined. Check that the definition is taking place in a
7522 check_class_member_definition_namespace (tree decl
)
7524 /* These checks only apply to member functions and static data
7526 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7527 /* We check for problems with specializations in pt.c in
7528 check_specialization_namespace, where we can issue better
7530 if (processing_specialization
)
7532 /* There are no restrictions on the placement of
7533 explicit instantiations. */
7534 if (processing_explicit_instantiation
)
7538 A member function definition that appears outside of the
7539 class definition shall appear in a namespace scope enclosing
7540 the class definition.
7544 The definition for a static data member shall appear in a
7545 namespace scope enclosing the member's class definition. */
7546 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7547 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7548 decl
, DECL_CONTEXT (decl
));
7551 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7552 METHOD_TYPE for a non-static member function; QUALS are the
7553 cv-qualifiers that apply to the function. */
7556 build_this_parm (tree type
, cp_cv_quals quals
)
7561 cp_cv_quals this_quals
;
7563 if (CLASS_TYPE_P (type
))
7566 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7567 this_type
= build_pointer_type (this_type
);
7570 this_type
= type_of_this_parm (type
);
7571 /* The `this' parameter is implicitly `const'; it cannot be
7573 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7574 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7575 parm
= build_artificial_parm (this_identifier
, qual_type
);
7576 cp_apply_type_quals_to_decl (this_quals
, parm
);
7580 /* DECL is a static member function. Complain if it was declared
7581 with function-cv-quals. */
7584 check_static_quals (tree decl
, cp_cv_quals quals
)
7586 if (quals
!= TYPE_UNQUALIFIED
)
7587 error ("static member function %q#D declared with type qualifiers",
7591 /* Helper function. Replace the temporary this parameter injected
7592 during cp_finish_omp_declare_simd with the real this parameter. */
7595 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7597 tree this_parm
= (tree
) data
;
7598 if (TREE_CODE (*tp
) == PARM_DECL
7599 && DECL_NAME (*tp
) == this_identifier
7600 && *tp
!= this_parm
)
7602 else if (TYPE_P (*tp
))
7607 /* CTYPE is class type, or null if non-class.
7608 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7610 DECLARATOR is the function's name.
7611 PARMS is a chain of PARM_DECLs for the function.
7612 VIRTUALP is truthvalue of whether the function is virtual or not.
7613 FLAGS are to be passed through to `grokclassfn'.
7614 QUALS are qualifiers indicating whether the function is `const'
7616 RAISES is a list of exceptions that this function can raise.
7617 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7618 not look, and -1 if we should not call `grokclassfn' at all.
7620 SFK is the kind of special function (if any) for the new function.
7622 Returns `NULL_TREE' if something goes wrong, after issuing
7623 applicable error messages. */
7626 grokfndecl (tree ctype
,
7630 tree orig_declarator
,
7632 enum overload_flags flags
,
7634 cp_ref_qualifier rqual
,
7641 special_function_kind sfk
,
7646 location_t location
)
7649 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7653 type
= build_ref_qualified_type (type
, rqual
);
7655 type
= build_exception_variant (type
, raises
);
7657 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7659 /* If we have an explicit location, use it, otherwise use whatever
7660 build_lang_decl used (probably input_location). */
7661 if (location
!= UNKNOWN_LOCATION
)
7662 DECL_SOURCE_LOCATION (decl
) = location
;
7664 if (TREE_CODE (type
) == METHOD_TYPE
)
7667 parm
= build_this_parm (type
, quals
);
7668 DECL_CHAIN (parm
) = parms
;
7671 DECL_ARGUMENTS (decl
) = parms
;
7672 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7673 DECL_CONTEXT (t
) = decl
;
7674 /* Propagate volatile out from type to decl. */
7675 if (TYPE_VOLATILE (type
))
7676 TREE_THIS_VOLATILE (decl
) = 1;
7678 /* Setup decl according to sfk. */
7681 case sfk_constructor
:
7682 case sfk_copy_constructor
:
7683 case sfk_move_constructor
:
7684 DECL_CONSTRUCTOR_P (decl
) = 1;
7686 case sfk_destructor
:
7687 DECL_DESTRUCTOR_P (decl
) = 1;
7693 /* If pointers to member functions use the least significant bit to
7694 indicate whether a function is virtual, ensure a pointer
7695 to this function will have that bit clear. */
7696 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7697 && TREE_CODE (type
) == METHOD_TYPE
7698 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7699 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7702 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7706 ("defining explicit specialization %qD in friend declaration",
7710 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7711 tree args
= TREE_OPERAND (orig_declarator
, 1);
7713 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7715 /* Something like `template <class T> friend void f<T>()'. */
7716 error ("invalid use of template-id %qD in declaration "
7717 "of primary template",
7723 /* A friend declaration of the form friend void f<>(). Record
7724 the information in the TEMPLATE_ID_EXPR. */
7725 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7727 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7728 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7730 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7731 if (TREE_PURPOSE (t
)
7732 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7734 error ("default arguments are not allowed in declaration "
7735 "of friend template specialization %qD",
7741 error ("%<inline%> is not allowed in declaration of friend "
7742 "template specialization %qD",
7745 error ("%<constexpr%> is not allowed in declaration of friend "
7746 "template specialization %qD",
7753 /* If this decl has namespace scope, set that up. */
7755 set_decl_namespace (decl
, in_namespace
, friendp
);
7757 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7759 /* `main' and builtins have implicit 'C' linkage. */
7760 if ((MAIN_NAME_P (declarator
)
7761 || (IDENTIFIER_LENGTH (declarator
) > 10
7762 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7763 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7764 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7765 || (targetcm
.cxx_implicit_extern_c
7766 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7767 && current_lang_name
== lang_name_cplusplus
7768 && ctype
== NULL_TREE
7769 && DECL_FILE_SCOPE_P (decl
))
7770 SET_DECL_LANGUAGE (decl
, lang_c
);
7772 /* Should probably propagate const out from type to decl I bet (mrs). */
7775 DECL_STATIC_FUNCTION_P (decl
) = 1;
7776 DECL_CONTEXT (decl
) = ctype
;
7780 DECL_DELETED_FN (decl
) = 1;
7784 DECL_CONTEXT (decl
) = ctype
;
7786 check_class_member_definition_namespace (decl
);
7789 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7791 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7792 error ("cannot declare %<::main%> to be a template");
7794 error ("cannot declare %<::main%> to be inline");
7796 error ("cannot declare %<::main%> to be constexpr");
7798 error ("cannot declare %<::main%> to be static");
7803 /* Members of anonymous types and local classes have no linkage; make
7804 them internal. If a typedef is made later, this will be changed. */
7805 if (ctype
&& (!TREE_PUBLIC (TYPE_MAIN_DECL (ctype
))
7806 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7809 if (publicp
&& cxx_dialect
== cxx98
)
7811 /* [basic.link]: A name with no linkage (notably, the name of a class
7812 or enumeration declared in a local scope) shall not be used to
7813 declare an entity with linkage.
7815 DR 757 relaxes this restriction for C++0x. */
7816 no_linkage_error (decl
);
7819 TREE_PUBLIC (decl
) = publicp
;
7822 DECL_INTERFACE_KNOWN (decl
) = 1;
7823 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7826 /* If the declaration was declared inline, mark it as such. */
7829 DECL_DECLARED_INLINE_P (decl
) = 1;
7831 DECL_COMDAT (decl
) = 1;
7834 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7836 DECL_EXTERNAL (decl
) = 1;
7837 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7842 ? G_("static member function %qD cannot have cv-qualifier")
7843 : G_("non-member function %qD cannot have cv-qualifier"),
7845 quals
= TYPE_UNQUALIFIED
;
7851 ? G_("static member function %qD cannot have ref-qualifier")
7852 : G_("non-member function %qD cannot have ref-qualifier"),
7854 rqual
= REF_QUAL_NONE
;
7858 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7859 && !grok_op_properties (decl
, /*complain=*/true))
7861 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7863 bool long_long_unsigned_p
;
7865 const char *suffix
= NULL
;
7866 /* [over.literal]/6: Literal operators shall not have C linkage. */
7867 if (DECL_LANGUAGE (decl
) == lang_c
)
7869 error ("literal operator with C linkage");
7873 if (DECL_NAMESPACE_SCOPE_P (decl
))
7875 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7878 error ("%qD has invalid argument list", decl
);
7882 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7883 if (long_long_unsigned_p
)
7885 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7886 warning (0, "integer suffix %<%s%>"
7887 " shadowed by implementation", suffix
);
7889 else if (long_double_p
)
7891 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7892 warning (0, "floating point suffix %<%s%>"
7893 " shadowed by implementation", suffix
);
7898 error ("%qD must be a non-member function", decl
);
7904 /* Make the init_value nonzero so pushdecl knows this is not
7905 tentative. error_mark_node is replaced later with the BLOCK. */
7906 DECL_INITIAL (decl
) = error_mark_node
;
7908 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7909 TREE_NOTHROW (decl
) = 1;
7911 if (flag_openmp
|| flag_cilkplus
)
7913 /* Adjust "omp declare simd" attributes. */
7914 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7918 for (attr
= ods
; attr
;
7919 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7921 if (TREE_CODE (type
) == METHOD_TYPE
)
7922 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7923 DECL_ARGUMENTS (decl
), NULL
);
7924 if (TREE_VALUE (attr
) != NULL_TREE
)
7926 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7927 cl
= c_omp_declare_simd_clauses_to_numbers
7928 (DECL_ARGUMENTS (decl
), cl
);
7930 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7932 TREE_VALUE (attr
) = NULL_TREE
;
7938 /* Caller will do the rest of this. */
7942 if (ctype
!= NULL_TREE
)
7943 grokclassfn (ctype
, decl
, flags
);
7946 if (cxx_dialect
>= cxx11
7947 && DECL_DESTRUCTOR_P (decl
)
7948 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7949 && !processing_template_decl
)
7950 deduce_noexcept_on_destructor (decl
);
7952 decl
= check_explicit_specialization (orig_declarator
, decl
,
7955 4 * (friendp
!= 0));
7956 if (decl
== error_mark_node
)
7959 if (DECL_STATIC_FUNCTION_P (decl
))
7960 check_static_quals (decl
, quals
);
7964 cplus_decl_attributes (&decl
, *attrlist
, 0);
7965 *attrlist
= NULL_TREE
;
7968 /* Check main's type after attributes have been applied. */
7969 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7971 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7974 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7976 error ("%<::main%> must return %<int%>");
7977 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7978 TREE_TYPE (decl
) = newtype
;
7981 check_main_parameter_types (decl
);
7984 if (ctype
!= NULL_TREE
7985 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7988 tree old_decl
= check_classfn (ctype
, decl
,
7989 (processing_template_decl
7990 > template_class_depth (ctype
))
7991 ? current_template_parms
7994 if (old_decl
== error_mark_node
)
8002 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
8003 /* Because grokfndecl is always supposed to return a
8004 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8005 here. We depend on our callers to figure out that its
8006 really a template that's being returned. */
8007 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
8009 if (DECL_STATIC_FUNCTION_P (old_decl
)
8010 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8012 /* Remove the `this' parm added by grokclassfn. */
8013 revert_static_member_fn (decl
);
8014 check_static_quals (decl
, quals
);
8016 if (DECL_ARTIFICIAL (old_decl
))
8018 error ("definition of implicitly-declared %qD", old_decl
);
8021 else if (DECL_DEFAULTED_FN (old_decl
))
8023 error ("definition of explicitly-defaulted %q+D", decl
);
8024 error ("%q+#D explicitly defaulted here", old_decl
);
8028 /* Since we've smashed OLD_DECL to its
8029 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8030 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8031 decl
= DECL_TEMPLATE_RESULT (decl
);
8033 /* Attempt to merge the declarations. This can fail, in
8034 the case of some invalid specialization declarations. */
8035 pushed_scope
= push_scope (ctype
);
8036 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8038 pop_scope (pushed_scope
);
8041 error ("no %q#D member function declared in class %qT",
8045 if (ok
== error_mark_node
)
8051 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8054 if (ctype
== NULL_TREE
|| check
)
8058 DECL_VIRTUAL_P (decl
) = 1;
8063 /* decl is a FUNCTION_DECL.
8064 specifiers are the parsed virt-specifiers.
8066 Set flags to reflect the virt-specifiers.
8071 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8073 if (decl
== NULL_TREE
)
8075 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8076 DECL_OVERRIDE_P (decl
) = 1;
8077 if (specifiers
& VIRT_SPEC_FINAL
)
8078 DECL_FINAL_P (decl
) = 1;
8082 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8083 the linkage that DECL will receive in the object file. */
8086 set_linkage_for_static_data_member (tree decl
)
8088 /* A static data member always has static storage duration and
8089 external linkage. Note that static data members are forbidden in
8090 local classes -- the only situation in which a class has
8091 non-external linkage. */
8092 TREE_PUBLIC (decl
) = 1;
8093 TREE_STATIC (decl
) = 1;
8094 /* For non-template classes, static data members are always put
8095 out in exactly those files where they are defined, just as
8096 with ordinary namespace-scope variables. */
8097 if (!processing_template_decl
)
8098 DECL_INTERFACE_KNOWN (decl
) = 1;
8101 /* Create a VAR_DECL named NAME with the indicated TYPE.
8103 If SCOPE is non-NULL, it is the class type or namespace containing
8104 the variable. If SCOPE is NULL, the variable should is created in
8105 the innermost enclosing scope. */
8108 grokvardecl (tree type
,
8110 tree orig_declarator
,
8111 const cp_decl_specifier_seq
*declspecs
,
8118 tree explicit_scope
;
8120 gcc_assert (!name
|| identifier_p (name
));
8122 /* Compute the scope in which to place the variable, but remember
8123 whether or not that scope was explicitly specified by the user. */
8124 explicit_scope
= scope
;
8127 /* An explicit "extern" specifier indicates a namespace-scope
8129 if (declspecs
->storage_class
== sc_extern
)
8130 scope
= current_decl_namespace ();
8131 else if (!at_function_scope_p ())
8132 scope
= current_scope ();
8136 && (/* If the variable is a namespace-scope variable declared in a
8137 template, we need DECL_LANG_SPECIFIC. */
8138 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8139 /* Similarly for namespace-scope variables with language linkage
8141 || (TREE_CODE (scope
) == NAMESPACE_DECL
8142 && current_lang_name
!= lang_name_cplusplus
)
8143 /* Similarly for static data members. */
8145 /* Similarly for explicit specializations. */
8147 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8148 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8150 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8152 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8153 set_decl_namespace (decl
, explicit_scope
, 0);
8155 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8157 if (declspecs
->storage_class
== sc_extern
)
8159 DECL_THIS_EXTERN (decl
) = 1;
8160 DECL_EXTERNAL (decl
) = !initialized
;
8163 if (DECL_CLASS_SCOPE_P (decl
))
8165 set_linkage_for_static_data_member (decl
);
8166 /* This function is only called with out-of-class definitions. */
8167 DECL_EXTERNAL (decl
) = 0;
8168 check_class_member_definition_namespace (decl
);
8170 /* At top level, either `static' or no s.c. makes a definition
8171 (perhaps tentative), and absence of `static' makes it public. */
8172 else if (toplevel_bindings_p ())
8174 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8175 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8176 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8178 /* Not at top level, only `static' makes a static definition. */
8181 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8182 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8185 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8187 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8188 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8189 if (declspecs
->gnu_thread_keyword_p
)
8190 DECL_GNU_TLS_P (decl
) = true;
8193 /* If the type of the decl has no linkage, make sure that we'll
8194 notice that in mark_used. */
8195 if (cxx_dialect
> cxx98
8196 && decl_linkage (decl
) != lk_none
8197 && DECL_LANG_SPECIFIC (decl
) == NULL
8198 && !DECL_EXTERN_C_P (decl
)
8199 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8200 retrofit_lang_decl (decl
);
8202 if (TREE_PUBLIC (decl
))
8204 /* [basic.link]: A name with no linkage (notably, the name of a class
8205 or enumeration declared in a local scope) shall not be used to
8206 declare an entity with linkage.
8208 DR 757 relaxes this restriction for C++0x. */
8209 if (cxx_dialect
< cxx11
)
8210 no_linkage_error (decl
);
8213 DECL_INTERFACE_KNOWN (decl
) = 1;
8215 // Handle explicit specializations and instantiations of variable templates.
8216 if (orig_declarator
)
8217 decl
= check_explicit_specialization (orig_declarator
, decl
,
8220 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8223 /* Create and return a canonical pointer to member function type, for
8224 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8227 build_ptrmemfunc_type (tree type
)
8232 if (type
== error_mark_node
)
8235 /* Make sure that we always have the unqualified pointer-to-member
8237 if (cp_cv_quals quals
= cp_type_quals (type
))
8239 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8240 return cp_build_qualified_type (unqual
, quals
);
8243 /* If a canonical type already exists for this type, use it. We use
8244 this method instead of type_hash_canon, because it only does a
8245 simple equality check on the list of field members. */
8247 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8250 t
= make_node (RECORD_TYPE
);
8252 /* Let the front end know this is a pointer to member function. */
8253 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8255 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8258 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8260 DECL_CHAIN (field
) = fields
;
8263 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8265 /* Zap out the name so that the back end will give us the debugging
8266 information for this anonymous RECORD_TYPE. */
8267 TYPE_NAME (t
) = NULL_TREE
;
8269 /* Cache this pointer-to-member type so that we can find it again
8271 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8273 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8274 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8275 else if (TYPE_CANONICAL (type
) != type
)
8276 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8281 /* Create and return a pointer to data member type. */
8284 build_ptrmem_type (tree class_type
, tree member_type
)
8286 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8288 cp_cv_quals quals
= type_memfn_quals (member_type
);
8289 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8290 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8291 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8295 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8296 return build_offset_type (class_type
, member_type
);
8300 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8301 Check to see that the definition is valid. Issue appropriate error
8302 messages. Return 1 if the definition is particularly bad, or 0
8306 check_static_variable_definition (tree decl
, tree type
)
8308 /* Can't check yet if we don't know the type. */
8309 if (dependent_type_p (type
))
8311 /* If DECL is declared constexpr, we'll do the appropriate checks
8312 in check_initializer. */
8313 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8315 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8317 if (!COMPLETE_TYPE_P (type
))
8318 error ("in-class initialization of static data member %q#D of "
8319 "incomplete type", decl
);
8320 else if (literal_type_p (type
))
8321 permerror (input_location
,
8322 "%<constexpr%> needed for in-class initialization of "
8323 "static data member %q#D of non-integral type", decl
);
8325 error ("in-class initialization of static data member %q#D of "
8326 "non-literal type", decl
);
8330 /* Motion 10 at San Diego: If a static const integral data member is
8331 initialized with an integral constant expression, the initializer
8332 may appear either in the declaration (within the class), or in
8333 the definition, but not both. If it appears in the class, the
8334 member is a member constant. The file-scope definition is always
8336 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8338 error ("invalid in-class initialization of static data member "
8339 "of non-integral type %qT",
8343 else if (!CP_TYPE_CONST_P (type
))
8344 error ("ISO C++ forbids in-class initialization of non-const "
8345 "static member %qD",
8347 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8348 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8349 "%qD of non-integral type %qT", decl
, type
);
8354 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8355 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8356 expressions out into temporary variables so that walk_tree doesn't
8357 step into them (c++/15764). */
8360 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8362 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8363 tree expr
= *expr_p
;
8364 if (TREE_CODE (expr
) == SAVE_EXPR
)
8366 tree op
= TREE_OPERAND (expr
, 0);
8367 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8368 if (TREE_SIDE_EFFECTS (op
))
8369 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8372 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8377 /* Entry point for the above. */
8380 stabilize_vla_size (tree size
)
8382 hash_set
<tree
> pset
;
8383 /* Break out any function calls into temporary variables. */
8384 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8387 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8388 not inside of SAVE_EXPR and fold them. */
8391 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8393 tree expr
= *expr_p
;
8394 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8396 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8398 *(bool *)data
= true;
8399 if (SIZEOF_EXPR_TYPE_P (expr
))
8400 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8401 SIZEOF_EXPR
, false);
8402 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8403 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8406 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8408 if (expr
== error_mark_node
)
8409 expr
= size_one_node
;
8416 /* Given the SIZE (i.e., number of elements) in an array, compute an
8417 appropriate index type for the array. If non-NULL, NAME is the
8418 name of the thing being declared. */
8421 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8426 if (error_operand_p (size
))
8427 return error_mark_node
;
8429 if (!type_dependent_expression_p (size
))
8431 tree type
= TREE_TYPE (size
);
8433 mark_rvalue_use (size
);
8435 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8436 && TREE_SIDE_EFFECTS (size
))
8437 /* In C++98, we mark a non-constant array bound with a magic
8438 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8441 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8443 if (CLASS_TYPE_P (type
)
8444 && CLASSTYPE_LITERAL_P (type
))
8446 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8449 if (!(complain
& tf_error
))
8450 return error_mark_node
;
8452 error ("size of array %qD has non-integral type %qT",
8455 error ("size of array has non-integral type %qT", type
);
8456 size
= integer_one_node
;
8458 if (size
== error_mark_node
)
8459 return error_mark_node
;
8460 type
= TREE_TYPE (size
);
8463 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8464 size
= maybe_constant_value (size
);
8466 if (!TREE_CONSTANT (size
))
8470 if (error_operand_p (size
))
8471 return error_mark_node
;
8473 /* The array bound must be an integer type. */
8474 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8476 if (!(complain
& tf_error
))
8477 return error_mark_node
;
8479 error ("size of array %qD has non-integral type %qT", name
, type
);
8481 error ("size of array has non-integral type %qT", type
);
8482 size
= integer_one_node
;
8483 type
= TREE_TYPE (size
);
8487 /* A type is dependent if it is...an array type constructed from any
8488 dependent type or whose size is specified by a constant expression
8489 that is value-dependent. */
8490 /* We can only call value_dependent_expression_p on integral constant
8491 expressions; treat non-constant expressions as dependent, too. */
8492 if (processing_template_decl
8493 && (type_dependent_expression_p (size
)
8494 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8496 /* We cannot do any checking for a SIZE that isn't known to be
8497 constant. Just build the index type and mark that it requires
8498 structural equality checks. */
8499 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8500 size
, size_one_node
));
8501 TYPE_DEPENDENT_P (itype
) = 1;
8502 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8503 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8507 /* Normally, the array-bound will be a constant. */
8508 if (TREE_CODE (size
) == INTEGER_CST
)
8510 /* Check to see if the array bound overflowed. Make that an
8511 error, no matter how generous we're being. */
8512 constant_expression_error (size
);
8514 /* An array must have a positive number of elements. */
8515 if (tree_int_cst_lt (size
, integer_zero_node
))
8517 if (!(complain
& tf_error
))
8518 return error_mark_node
;
8520 error ("size of array %qD is negative", name
);
8522 error ("size of array is negative");
8523 size
= integer_one_node
;
8525 /* As an extension we allow zero-sized arrays. */
8526 else if (integer_zerop (size
))
8528 if (!(complain
& tf_error
))
8529 /* We must fail if performing argument deduction (as
8530 indicated by the state of complain), so that
8531 another substitution can be found. */
8532 return error_mark_node
;
8533 else if (in_system_header_at (input_location
))
8534 /* Allow them in system headers because glibc uses them. */;
8536 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8538 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8541 else if (TREE_CONSTANT (size
)
8542 /* We don't allow VLAs at non-function scopes, or during
8543 tentative template substitution. */
8544 || !at_function_scope_p ()
8545 || !(complain
& tf_error
))
8547 if (!(complain
& tf_error
))
8548 return error_mark_node
;
8549 /* `(int) &fn' is not a valid array bound. */
8551 error ("size of array %qD is not an integral constant-expression",
8554 error ("size of array is not an integral constant-expression");
8555 size
= integer_one_node
;
8557 else if (pedantic
&& warn_vla
!= 0)
8560 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8562 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8564 else if (warn_vla
> 0)
8568 "variable length array %qD is used", name
);
8571 "variable length array is used");
8574 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8575 /* A variable sized array. */
8576 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8579 HOST_WIDE_INT saved_processing_template_decl
;
8581 /* Compute the index of the largest element in the array. It is
8582 one less than the number of elements in the array. We save
8583 and restore PROCESSING_TEMPLATE_DECL so that computations in
8584 cp_build_binary_op will be appropriately folded. */
8585 saved_processing_template_decl
= processing_template_decl
;
8586 processing_template_decl
= 0;
8587 itype
= cp_build_binary_op (input_location
,
8589 cp_convert (ssizetype
, size
, complain
),
8590 cp_convert (ssizetype
, integer_one_node
,
8593 itype
= fold (itype
);
8594 processing_template_decl
= saved_processing_template_decl
;
8596 if (!TREE_CONSTANT (itype
))
8598 /* A variable sized array. */
8599 itype
= variable_size (itype
);
8601 if (TREE_CODE (itype
) != SAVE_EXPR
)
8603 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8604 they might survive till gimplification. */
8605 tree newitype
= itype
;
8607 cp_walk_tree_without_duplicates (&newitype
,
8608 fold_sizeof_expr_r
, &found
);
8610 itype
= variable_size (fold (newitype
));
8613 stabilize_vla_size (itype
);
8615 if (flag_sanitize
& SANITIZE_VLA
8616 && do_ubsan_in_current_function ())
8618 /* We have to add 1 -- in the ubsan routine we generate
8619 LE_EXPR rather than LT_EXPR. */
8620 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8621 build_one_cst (TREE_TYPE (itype
)));
8622 t
= ubsan_instrument_vla (input_location
, t
);
8623 finish_expr_stmt (t
);
8626 /* Make sure that there was no overflow when creating to a signed
8627 index type. (For example, on a 32-bit machine, an array with
8628 size 2^32 - 1 is too big.) */
8629 else if (TREE_CODE (itype
) == INTEGER_CST
8630 && TREE_OVERFLOW (itype
))
8632 if (!(complain
& tf_error
))
8633 return error_mark_node
;
8634 error ("overflow in array dimension");
8635 TREE_OVERFLOW (itype
) = 0;
8639 /* Create and return the appropriate index type. */
8640 itype
= build_index_type (itype
);
8642 /* If the index type were dependent, we would have returned early, so
8643 remember that it isn't. */
8644 TYPE_DEPENDENT_P (itype
) = 0;
8645 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8649 /* Returns the scope (if any) in which the entity declared by
8650 DECLARATOR will be located. If the entity was declared with an
8651 unqualified name, NULL_TREE is returned. */
8654 get_scope_of_declarator (const cp_declarator
*declarator
)
8656 while (declarator
&& declarator
->kind
!= cdk_id
)
8657 declarator
= declarator
->declarator
;
8659 /* If the declarator-id is a SCOPE_REF, the scope in which the
8660 declaration occurs is the first operand. */
8662 && declarator
->u
.id
.qualifying_scope
)
8663 return declarator
->u
.id
.qualifying_scope
;
8665 /* Otherwise, the declarator is not a qualified name; the entity will
8666 be declared in the current scope. */
8670 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8671 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8675 create_array_type_for_decl (tree name
, tree type
, tree size
)
8677 tree itype
= NULL_TREE
;
8679 /* If things have already gone awry, bail now. */
8680 if (type
== error_mark_node
|| size
== error_mark_node
)
8681 return error_mark_node
;
8683 /* 8.3.4/1: If the type of the identifier of D contains the auto
8684 type-specifier, the program is ill-formed. */
8685 if (type_uses_auto (type
))
8687 error ("%qD declared as array of %qT", name
, type
);
8688 return error_mark_node
;
8691 /* If there are some types which cannot be array elements,
8692 issue an error-message and return. */
8693 switch (TREE_CODE (type
))
8697 error ("declaration of %qD as array of void", name
);
8699 error ("creating array of void");
8700 return error_mark_node
;
8704 error ("declaration of %qD as array of functions", name
);
8706 error ("creating array of functions");
8707 return error_mark_node
;
8709 case REFERENCE_TYPE
:
8711 error ("declaration of %qD as array of references", name
);
8713 error ("creating array of references");
8714 return error_mark_node
;
8718 error ("declaration of %qD as array of function members", name
);
8720 error ("creating array of function members");
8721 return error_mark_node
;
8729 The constant expressions that specify the bounds of the arrays
8730 can be omitted only for the first member of the sequence. */
8731 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8734 error ("declaration of %qD as multidimensional array must "
8735 "have bounds for all dimensions except the first",
8738 error ("multidimensional array must have bounds for all "
8739 "dimensions except the first");
8741 return error_mark_node
;
8744 /* Figure out the index type for the array. */
8746 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8749 T is called the array element type; this type shall not be [...] an
8750 abstract class type. */
8751 abstract_virtuals_error (name
, type
);
8753 return build_cplus_array_type (type
, itype
);
8756 /* Check that it's OK to declare a function with the indicated TYPE.
8757 SFK indicates the kind of special function (if any) that this
8758 function is. OPTYPE is the type given in a conversion operator
8759 declaration, or the class type for a constructor/destructor.
8760 Returns the actual return type of the function; that
8761 may be different than TYPE if an error occurs, or for certain
8762 special functions. */
8765 check_special_function_return_type (special_function_kind sfk
,
8771 case sfk_constructor
:
8773 error ("return type specification for constructor invalid");
8775 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8776 type
= build_pointer_type (optype
);
8778 type
= void_type_node
;
8781 case sfk_destructor
:
8783 error ("return type specification for destructor invalid");
8784 /* We can't use the proper return type here because we run into
8785 problems with ambiguous bases and covariant returns.
8786 Java classes are left unchanged because (void *) isn't a valid
8787 Java type, and we don't want to change the Java ABI. */
8788 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8789 type
= build_pointer_type (void_type_node
);
8791 type
= void_type_node
;
8794 case sfk_conversion
:
8796 error ("return type specified for %<operator %T%>", optype
);
8807 /* A variable or data member (whose unqualified name is IDENTIFIER)
8808 has been declared with the indicated TYPE. If the TYPE is not
8809 acceptable, issue an error message and return a type to use for
8810 error-recovery purposes. */
8813 check_var_type (tree identifier
, tree type
)
8815 if (VOID_TYPE_P (type
))
8818 error ("unnamed variable or field declared void");
8819 else if (identifier_p (identifier
))
8821 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8822 error ("variable or field %qE declared void", identifier
);
8825 error ("variable or field declared void");
8826 type
= error_mark_node
;
8832 /* Given declspecs and a declarator (abstract or otherwise), determine
8833 the name and type of the object declared and construct a DECL node
8836 DECLSPECS points to the representation of declaration-specifier
8837 sequence that precedes declarator.
8839 DECL_CONTEXT says which syntactic context this declaration is in:
8840 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8841 FUNCDEF for a function definition. Like NORMAL but a few different
8842 error messages in each case. Return value may be zero meaning
8843 this definition is too screwy to try to parse.
8844 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8845 handle member functions (which have FIELD context).
8846 Return value may be zero meaning this definition is too screwy to
8848 PARM for a parameter declaration (either within a function prototype
8849 or before a function body). Make a PARM_DECL, or return void_type_node.
8850 TPARM for a template parameter declaration.
8851 CATCHPARM for a parameter declaration before a catch clause.
8852 TYPENAME if for a typename (in a cast or sizeof).
8853 Don't make a DECL node; just return the ..._TYPE node.
8854 FIELD for a struct or union field; make a FIELD_DECL.
8855 BITFIELD for a field with specified width.
8857 INITIALIZED is as for start_decl.
8859 ATTRLIST is a pointer to the list of attributes, which may be NULL
8860 if there are none; *ATTRLIST may be modified if attributes from inside
8861 the declarator should be applied to the declaration.
8863 When this function is called, scoping variables (such as
8864 CURRENT_CLASS_TYPE) should reflect the scope in which the
8865 declaration occurs, not the scope in which the new declaration will
8866 be placed. For example, on:
8870 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8873 Returns a DECL (if a declarator is present), a TYPE (if there is no
8874 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8878 grokdeclarator (const cp_declarator
*declarator
,
8879 cp_decl_specifier_seq
*declspecs
,
8880 enum decl_context decl_context
,
8884 tree type
= NULL_TREE
;
8886 int explicit_intN
= 0;
8887 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8888 int explicit_int
= 0;
8889 int explicit_char
= 0;
8890 int defaulted_int
= 0;
8892 tree typedef_decl
= NULL_TREE
;
8893 const char *name
= NULL
;
8894 tree typedef_type
= NULL_TREE
;
8895 /* True if this declarator is a function definition. */
8896 bool funcdef_flag
= false;
8897 cp_declarator_kind innermost_code
= cdk_error
;
8900 /* See the code below that used this. */
8901 tree decl_attr
= NULL_TREE
;
8904 /* Keep track of what sort of function is being processed
8905 so that we can warn about default return values, or explicit
8906 return values which do not match prescribed defaults. */
8907 special_function_kind sfk
= sfk_none
;
8909 tree dname
= NULL_TREE
;
8910 tree ctor_return_type
= NULL_TREE
;
8911 enum overload_flags flags
= NO_SPECIAL
;
8912 /* cv-qualifiers that apply to the declarator, for a declaration of
8913 a member function. */
8914 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8915 /* virt-specifiers that apply to the declarator, for a declaration of
8916 a member function. */
8917 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8918 /* ref-qualifier that applies to the declarator, for a declaration of
8919 a member function. */
8920 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8921 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8923 tree raises
= NULL_TREE
;
8924 int template_count
= 0;
8925 tree returned_attrs
= NULL_TREE
;
8926 tree parms
= NULL_TREE
;
8927 const cp_declarator
*id_declarator
;
8928 /* The unqualified name of the declarator; either an
8929 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8930 tree unqualified_id
;
8931 /* The class type, if any, in which this entity is located,
8932 or NULL_TREE if none. Note that this value may be different from
8933 the current class type; for example if an attempt is made to declare
8934 "A::f" inside "B", this value will be "A". */
8935 tree ctype
= current_class_type
;
8936 /* The NAMESPACE_DECL for the namespace in which this entity is
8937 located. If an unqualified name is used to declare the entity,
8938 this value will be NULL_TREE, even if the entity is located at
8940 tree in_namespace
= NULL_TREE
;
8941 cp_storage_class storage_class
;
8942 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8943 bool type_was_error_mark_node
= false;
8944 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8945 bool template_type_arg
= false;
8946 bool template_parm_flag
= false;
8947 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8948 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8949 bool late_return_type_p
= false;
8950 bool array_parameter_p
= false;
8951 source_location saved_loc
= input_location
;
8954 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8955 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8956 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8957 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8958 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8959 explicit_intN
= declspecs
->explicit_intN_p
;
8960 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8962 if (decl_context
== FUNCDEF
)
8963 funcdef_flag
= true, decl_context
= NORMAL
;
8964 else if (decl_context
== MEMFUNCDEF
)
8965 funcdef_flag
= true, decl_context
= FIELD
;
8966 else if (decl_context
== BITFIELD
)
8967 bitfield
= 1, decl_context
= FIELD
;
8968 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8969 template_type_arg
= true, decl_context
= TYPENAME
;
8970 else if (decl_context
== TPARM
)
8971 template_parm_flag
= true, decl_context
= PARM
;
8973 if (initialized
> 1)
8974 funcdef_flag
= true;
8976 /* Look inside a declarator for the name being declared
8977 and get it as a string, for an error message. */
8978 for (id_declarator
= declarator
;
8980 id_declarator
= id_declarator
->declarator
)
8982 if (id_declarator
->kind
!= cdk_id
)
8983 innermost_code
= id_declarator
->kind
;
8985 switch (id_declarator
->kind
)
8988 if (id_declarator
->declarator
8989 && id_declarator
->declarator
->kind
== cdk_id
)
8991 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8992 if (sfk
== sfk_destructor
)
8999 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
9000 tree decl
= id_declarator
->u
.id
.unqualified_name
;
9003 if (qualifying_scope
)
9005 if (at_function_scope_p ())
9009 A declarator-id shall not be qualified except
9012 None of the cases are permitted in block
9014 if (qualifying_scope
== global_namespace
)
9015 error ("invalid use of qualified-name %<::%D%>",
9017 else if (TYPE_P (qualifying_scope
))
9018 error ("invalid use of qualified-name %<%T::%D%>",
9019 qualifying_scope
, decl
);
9021 error ("invalid use of qualified-name %<%D::%D%>",
9022 qualifying_scope
, decl
);
9023 return error_mark_node
;
9025 else if (TYPE_P (qualifying_scope
))
9027 ctype
= qualifying_scope
;
9028 if (!MAYBE_CLASS_TYPE_P (ctype
))
9030 error ("%q#T is not a class or a namespace", ctype
);
9033 else if (innermost_code
!= cdk_function
9034 && current_class_type
9035 && !uniquely_derived_from_p (ctype
,
9036 current_class_type
))
9038 error ("invalid use of qualified-name %<%T::%D%>",
9039 qualifying_scope
, decl
);
9040 return error_mark_node
;
9043 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9044 in_namespace
= qualifying_scope
;
9046 switch (TREE_CODE (decl
))
9052 if (innermost_code
!= cdk_function
)
9054 error ("declaration of %qD as non-function", decl
);
9055 return error_mark_node
;
9057 else if (!qualifying_scope
9058 && !(current_class_type
&& at_class_scope_p ()))
9060 error ("declaration of %qD as non-member", decl
);
9061 return error_mark_node
;
9064 type
= TREE_OPERAND (decl
, 0);
9066 type
= constructor_name (type
);
9067 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9072 case TEMPLATE_ID_EXPR
:
9074 tree fns
= TREE_OPERAND (decl
, 0);
9077 if (!identifier_p (dname
))
9079 if (variable_template_p (dname
))
9080 dname
= DECL_NAME (dname
);
9083 gcc_assert (is_overloaded_fn (dname
));
9084 dname
= DECL_NAME (get_first_fn (dname
));
9090 case IDENTIFIER_NODE
:
9091 if (identifier_p (decl
))
9094 if (C_IS_RESERVED_WORD (dname
))
9096 error ("declarator-id missing; using reserved word %qD",
9098 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9100 else if (!IDENTIFIER_TYPENAME_P (dname
))
9101 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9104 gcc_assert (flags
== NO_SPECIAL
);
9105 flags
= TYPENAME_FLAG
;
9106 ctor_return_type
= TREE_TYPE (dname
);
9107 sfk
= sfk_conversion
;
9108 if (is_typename_at_global_scope (dname
))
9109 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9111 name
= "<invalid operator>";
9128 return error_mark_node
;
9133 if (id_declarator
->kind
== cdk_id
)
9139 The declarator in a function-definition shall have the form
9140 D1 ( parameter-declaration-clause) ... */
9141 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9143 error ("function definition does not declare parameters");
9144 return error_mark_node
;
9147 if (flags
== TYPENAME_FLAG
9148 && innermost_code
!= cdk_function
9149 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9151 error ("declaration of %qD as non-function", dname
);
9152 return error_mark_node
;
9156 && identifier_p (dname
)
9157 && UDLIT_OPER_P (dname
)
9158 && innermost_code
!= cdk_function
)
9160 error ("declaration of %qD as non-function", dname
);
9161 return error_mark_node
;
9164 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9168 error ("declaration of %qD as %<typedef%>", dname
);
9169 return error_mark_node
;
9171 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9173 error ("declaration of %qD as parameter", dname
);
9174 return error_mark_node
;
9178 /* Anything declared one level down from the top level
9179 must be one of the parameters of a function
9180 (because the body is at least two levels down). */
9182 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9183 by not allowing C++ class definitions to specify their parameters
9184 with xdecls (must be spec.d in the parmlist).
9186 Since we now wait to push a class scope until we are sure that
9187 we are in a legitimate method context, we must set oldcname
9188 explicitly (since current_class_name is not yet alive).
9190 We also want to avoid calling this a PARM if it is in a namespace. */
9192 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9194 cp_binding_level
*b
= current_binding_level
;
9195 current_binding_level
= b
->level_chain
;
9196 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9197 decl_context
= PARM
;
9198 current_binding_level
= b
;
9202 name
= decl_context
== PARM
? "parameter" : "type name";
9204 if (constexpr_p
&& typedef_p
)
9206 error ("%<constexpr%> cannot appear in a typedef declaration");
9207 return error_mark_node
;
9210 /* If there were multiple types specified in the decl-specifier-seq,
9211 issue an error message. */
9212 if (declspecs
->multiple_types_p
)
9214 error ("two or more data types in declaration of %qs", name
);
9215 return error_mark_node
;
9218 if (declspecs
->conflicting_specifiers_p
)
9220 error ("conflicting specifiers in declaration of %qs", name
);
9221 return error_mark_node
;
9224 /* Extract the basic type from the decl-specifier-seq. */
9225 type
= declspecs
->type
;
9226 if (type
== error_mark_node
)
9229 type_was_error_mark_node
= true;
9231 /* If the entire declaration is itself tagged as deprecated then
9232 suppress reports of deprecated items. */
9233 if (type
&& TREE_DEPRECATED (type
)
9234 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9235 warn_deprecated_use (type
, NULL_TREE
);
9236 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9238 typedef_decl
= type
;
9239 type
= TREE_TYPE (typedef_decl
);
9240 if (TREE_DEPRECATED (type
)
9241 && DECL_ARTIFICIAL (typedef_decl
)
9242 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9243 warn_deprecated_use (type
, NULL_TREE
);
9245 /* No type at all: default to `int', and set DEFAULTED_INT
9246 because it was not a user-defined typedef. */
9247 if (type
== NULL_TREE
)
9249 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9251 /* These imply 'int'. */
9252 type
= integer_type_node
;
9255 /* If we just have "complex", it is equivalent to "complex double". */
9256 else if (!longlong
&& !explicit_intN
9257 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9259 type
= double_type_node
;
9260 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9261 "ISO C++ does not support plain %<complex%> meaning "
9262 "%<double complex%>");
9266 explicit_int
= declspecs
->explicit_int_p
;
9267 explicit_char
= declspecs
->explicit_char_p
;
9270 /* See the code below that used this. */
9272 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9274 typedef_type
= type
;
9277 if (sfk
!= sfk_conversion
)
9278 ctor_return_type
= ctype
;
9280 if (sfk
!= sfk_none
)
9281 type
= check_special_function_return_type (sfk
, type
,
9283 else if (type
== NULL_TREE
)
9289 /* We handle `main' specially here, because 'main () { }' is so
9290 common. With no options, it is allowed. With -Wreturn-type,
9291 it is a warning. It is only an error with -pedantic-errors. */
9292 is_main
= (funcdef_flag
9293 && dname
&& identifier_p (dname
)
9294 && MAIN_NAME_P (dname
)
9295 && ctype
== NULL_TREE
9296 && in_namespace
== NULL_TREE
9297 && current_namespace
== global_namespace
);
9299 if (type_was_error_mark_node
)
9300 /* We've already issued an error, don't complain more. */;
9301 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9302 /* Allow it, sigh. */;
9304 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9306 pedwarn (input_location
, OPT_Wpedantic
,
9307 "ISO C++ forbids declaration of %qs with no type", name
);
9309 warning (OPT_Wreturn_type
,
9310 "ISO C++ forbids declaration of %qs with no type", name
);
9312 type
= integer_type_node
;
9319 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9321 error ("%<__int%d%> is not supported by this target",
9322 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9323 explicit_intN
= false;
9325 else if (pedantic
&& ! in_system_header_at (input_location
))
9326 pedwarn (input_location
, OPT_Wpedantic
,
9327 "ISO C++ does not support %<__int%d%> for %qs",
9328 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9331 /* Now process the modifiers that were specified
9332 and check for invalid combinations. */
9334 /* Long double is a special combination. */
9335 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9338 type
= cp_build_qualified_type (long_double_type_node
,
9339 cp_type_quals (type
));
9342 /* Check all other uses of type modifiers. */
9344 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9348 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9349 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9350 else if (signed_p
&& unsigned_p
)
9351 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9352 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9353 error ("%<long long%> invalid for %qs", name
);
9354 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9355 error ("%<long%> invalid for %qs", name
);
9356 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9357 error ("%<short%> invalid for %qs", name
);
9358 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9359 error ("%<long%> or %<short%> invalid for %qs", name
);
9360 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9361 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9362 else if ((long_p
|| short_p
) && explicit_char
)
9363 error ("%<long%> or %<short%> specified with char for %qs", name
);
9364 else if (long_p
&& short_p
)
9365 error ("%<long%> and %<short%> specified together for %qs", name
);
9366 else if (type
== char16_type_node
|| type
== char32_type_node
)
9368 if (signed_p
|| unsigned_p
)
9369 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9370 else if (short_p
|| long_p
)
9371 error ("%<short%> or %<long%> invalid for %qs", name
);
9376 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9378 pedwarn (input_location
, OPT_Wpedantic
,
9379 "long, short, signed or unsigned used invalidly for %qs",
9381 if (flag_pedantic_errors
)
9386 /* Discard the type modifiers if they are invalid. */
9397 /* Decide whether an integer type is signed or not.
9398 Optionally treat bitfields as signed by default. */
9402 It is implementation-defined whether a plain (neither
9403 explicitly signed or unsigned) char, short, int, or long
9404 bit-field is signed or unsigned.
9406 Naturally, we extend this to long long as well. Note that
9407 this does not include wchar_t. */
9408 || (bitfield
&& !flag_signed_bitfields
9410 /* A typedef for plain `int' without `signed' can be
9411 controlled just like plain `int', but a typedef for
9412 `signed int' cannot be so controlled. */
9414 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9415 && TREE_CODE (type
) == INTEGER_TYPE
9416 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9419 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9421 type
= long_long_unsigned_type_node
;
9423 type
= long_unsigned_type_node
;
9425 type
= short_unsigned_type_node
;
9426 else if (type
== char_type_node
)
9427 type
= unsigned_char_type_node
;
9428 else if (typedef_decl
)
9429 type
= unsigned_type_for (type
);
9431 type
= unsigned_type_node
;
9433 else if (signed_p
&& type
== char_type_node
)
9434 type
= signed_char_type_node
;
9435 else if (explicit_intN
)
9436 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9438 type
= long_long_integer_type_node
;
9440 type
= long_integer_type_node
;
9442 type
= short_integer_type_node
;
9444 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9446 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9447 error ("complex invalid for %qs", name
);
9448 /* If a modifier is specified, the resulting complex is the complex
9449 form of TYPE. E.g, "complex short" is "complex short int". */
9450 else if (type
== integer_type_node
)
9451 type
= complex_integer_type_node
;
9452 else if (type
== float_type_node
)
9453 type
= complex_float_type_node
;
9454 else if (type
== double_type_node
)
9455 type
= complex_double_type_node
;
9456 else if (type
== long_double_type_node
)
9457 type
= complex_long_double_type_node
;
9459 type
= build_complex_type (type
);
9462 type_quals
= TYPE_UNQUALIFIED
;
9463 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9464 type_quals
|= TYPE_QUAL_CONST
;
9465 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9466 type_quals
|= TYPE_QUAL_VOLATILE
;
9467 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9468 type_quals
|= TYPE_QUAL_RESTRICT
;
9469 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9470 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9473 /* If we're using the injected-class-name to form a compound type or a
9474 declaration, replace it with the underlying class so we don't get
9475 redundant typedefs in the debug output. But if we are returning the
9476 type unchanged, leave it alone so that it's available to
9477 maybe_get_template_decl_from_type_decl. */
9478 if (CLASS_TYPE_P (type
)
9479 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9480 && type
== TREE_TYPE (TYPE_NAME (type
))
9481 && (declarator
|| type_quals
))
9482 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9484 type_quals
|= cp_type_quals (type
);
9485 type
= cp_build_qualified_type_real
9486 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9487 || declspecs
->decltype_p
)
9488 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9489 /* We might have ignored or rejected some of the qualifiers. */
9490 type_quals
= cp_type_quals (type
);
9493 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9494 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9495 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9497 storage_class
= declspecs
->storage_class
;
9498 if (storage_class
== sc_static
)
9499 staticp
= 1 + (decl_context
== FIELD
);
9501 if (virtualp
&& staticp
== 2)
9503 error ("member %qD cannot be declared both virtual and static", dname
);
9504 storage_class
= sc_none
;
9507 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9509 /* Issue errors about use of storage classes for parameters. */
9510 if (decl_context
== PARM
)
9514 error ("typedef declaration invalid in parameter declaration");
9515 return error_mark_node
;
9517 else if (template_parm_flag
&& storage_class
!= sc_none
)
9519 error ("storage class specified for template parameter %qs", name
);
9520 return error_mark_node
;
9522 else if (storage_class
== sc_static
9523 || storage_class
== sc_extern
9525 error ("storage class specifiers invalid in parameter declarations");
9527 /* Function parameters cannot be constexpr. If we saw one, moan
9528 and pretend it wasn't there. */
9531 error ("a parameter cannot be declared %<constexpr%>");
9536 /* Give error if `virtual' is used outside of class declaration. */
9538 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9540 error_at (declspecs
->locations
[ds_virtual
],
9541 "%<virtual%> outside class declaration");
9545 /* Static anonymous unions are dealt with here. */
9546 if (staticp
&& decl_context
== TYPENAME
9548 && ANON_AGGR_TYPE_P (declspecs
->type
))
9549 decl_context
= FIELD
;
9551 /* Warn about storage classes that are invalid for certain
9552 kinds of declarations (parameters, typenames, etc.). */
9555 && storage_class
!= sc_extern
9556 && storage_class
!= sc_static
)
9559 error ("multiple storage classes in declaration of %qs", name
);
9562 if (decl_context
!= NORMAL
9563 && ((storage_class
!= sc_none
9564 && storage_class
!= sc_mutable
)
9567 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9568 && (storage_class
== sc_register
9569 || storage_class
== sc_auto
))
9573 else if (decl_context
== FIELD
9574 /* C++ allows static class elements. */
9575 && storage_class
== sc_static
)
9576 /* C++ also allows inlines and signed and unsigned elements,
9577 but in those cases we don't come in here. */
9581 if (decl_context
== FIELD
)
9582 error ("storage class specified for %qs", name
);
9585 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9586 error ("storage class specified for parameter %qs", name
);
9588 error ("storage class specified for typename");
9590 if (storage_class
== sc_register
9591 || storage_class
== sc_auto
9592 || storage_class
== sc_extern
9594 storage_class
= sc_none
;
9597 else if (storage_class
== sc_extern
&& funcdef_flag
9598 && ! toplevel_bindings_p ())
9599 error ("nested function %qs declared %<extern%>", name
);
9600 else if (toplevel_bindings_p ())
9602 if (storage_class
== sc_auto
)
9603 error ("top-level declaration of %qs specifies %<auto%>", name
);
9606 && storage_class
!= sc_extern
9607 && storage_class
!= sc_static
)
9609 if (declspecs
->gnu_thread_keyword_p
)
9610 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9611 "declared %<__thread%>", name
);
9613 /* When thread_local is applied to a variable of block scope the
9614 storage-class-specifier static is implied if it does not appear
9616 storage_class
= declspecs
->storage_class
= sc_static
;
9620 if (storage_class
&& friendp
)
9622 error ("storage class specifiers invalid in friend function declarations");
9623 storage_class
= sc_none
;
9628 unqualified_id
= NULL_TREE
;
9631 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9632 switch (TREE_CODE (unqualified_id
))
9635 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9636 if (TYPE_P (unqualified_id
))
9637 unqualified_id
= constructor_name (unqualified_id
);
9640 case IDENTIFIER_NODE
:
9641 case TEMPLATE_ID_EXPR
:
9649 if (declspecs
->std_attributes
)
9651 /* Apply the c++11 attributes to the type preceding them. */
9652 input_location
= declspecs
->locations
[ds_std_attribute
];
9653 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9654 input_location
= saved_loc
;
9657 /* Determine the type of the entity declared by recurring on the
9659 for (; declarator
; declarator
= declarator
->declarator
)
9661 const cp_declarator
*inner_declarator
;
9664 if (type
== error_mark_node
)
9665 return error_mark_node
;
9667 attrs
= declarator
->attributes
;
9673 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9674 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9675 if (declarator
->kind
== cdk_function
)
9676 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9677 if (declarator
->kind
== cdk_array
)
9678 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9679 returned_attrs
= decl_attributes (&type
,
9680 chainon (returned_attrs
, attrs
),
9684 if (declarator
->kind
== cdk_id
)
9687 inner_declarator
= declarator
->declarator
;
9689 switch (declarator
->kind
)
9692 type
= create_array_type_for_decl (dname
, type
,
9693 declarator
->u
.array
.bounds
);
9694 if (declarator
->std_attributes
)
9697 The optional attribute-specifier-seq appertains to the
9699 returned_attrs
= chainon (returned_attrs
,
9700 declarator
->std_attributes
);
9708 /* Declaring a function type.
9709 Make sure we have a valid type for the function to return. */
9711 if (type_quals
!= TYPE_UNQUALIFIED
)
9713 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9714 warning (OPT_Wignored_qualifiers
,
9715 "type qualifiers ignored on function return type");
9716 /* We now know that the TYPE_QUALS don't apply to the
9717 decl, but to its return type. */
9718 type_quals
= TYPE_UNQUALIFIED
;
9720 errmsg
= targetm
.invalid_return_type (type
);
9724 type
= integer_type_node
;
9727 /* Error about some types functions can't return. */
9729 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9731 error ("%qs declared as function returning a function", name
);
9732 return error_mark_node
;
9734 if (TREE_CODE (type
) == ARRAY_TYPE
)
9736 error ("%qs declared as function returning an array", name
);
9737 return error_mark_node
;
9740 input_location
= declspecs
->locations
[ds_type_spec
];
9741 abstract_virtuals_error (ACU_RETURN
, type
);
9742 input_location
= saved_loc
;
9744 /* Pick up type qualifiers which should be applied to `this'. */
9745 memfn_quals
= declarator
->u
.function
.qualifiers
;
9746 /* Pick up virt-specifiers. */
9747 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9748 /* And ref-qualifier, too */
9749 rqual
= declarator
->u
.function
.ref_qualifier
;
9750 /* Pick up the exception specifications. */
9751 raises
= declarator
->u
.function
.exception_specification
;
9752 /* If the exception-specification is ill-formed, let's pretend
9753 there wasn't one. */
9754 if (raises
== error_mark_node
)
9757 /* Say it's a definition only for the CALL_EXPR
9758 closest to the identifier. */
9759 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9761 /* Handle a late-specified return type. */
9764 if (type_uses_auto (type
))
9766 if (!declarator
->u
.function
.late_return_type
)
9768 if (current_class_type
9769 && LAMBDA_TYPE_P (current_class_type
))
9770 /* OK for C++11 lambdas. */;
9771 else if (cxx_dialect
< cxx14
)
9773 error ("%qs function uses "
9774 "%<auto%> type specifier without trailing "
9775 "return type", name
);
9776 inform (input_location
, "deduced return type "
9777 "only available with -std=c++14 or "
9782 error ("virtual function cannot "
9783 "have deduced return type");
9787 else if (!is_auto (type
) && sfk
!= sfk_conversion
)
9789 error ("%qs function with trailing return type has"
9790 " %qT as its type rather than plain %<auto%>",
9792 return error_mark_node
;
9795 else if (declarator
->u
.function
.late_return_type
9796 && sfk
!= sfk_conversion
)
9798 if (cxx_dialect
< cxx11
)
9799 /* Not using maybe_warn_cpp0x because this should
9800 always be an error. */
9801 error ("trailing return type only available with "
9802 "-std=c++11 or -std=gnu++11");
9804 error ("%qs function with trailing return type not "
9805 "declared with %<auto%> type specifier", name
);
9806 return error_mark_node
;
9809 type
= splice_late_return_type
9810 (type
, declarator
->u
.function
.late_return_type
);
9811 if (type
== error_mark_node
)
9812 return error_mark_node
;
9814 if (declarator
->u
.function
.late_return_type
)
9815 late_return_type_p
= true;
9817 if (ctype
== NULL_TREE
9818 && decl_context
== FIELD
9821 ctype
= current_class_type
;
9823 if (ctype
&& (sfk
== sfk_constructor
9824 || sfk
== sfk_destructor
))
9826 /* We are within a class's scope. If our declarator name
9827 is the same as the class name, and we are defining
9828 a function, then it is a constructor/destructor, and
9829 therefore returns a void type. */
9831 /* ISO C++ 12.4/2. A destructor may not be declared
9832 const or volatile. A destructor may not be static.
9833 A destructor may not be declared with ref-qualifier.
9835 ISO C++ 12.1. A constructor may not be declared
9836 const or volatile. A constructor may not be
9837 virtual. A constructor may not be static.
9838 A constructor may not be declared with ref-qualifier. */
9840 error ((flags
== DTOR_FLAG
)
9841 ? G_("destructor cannot be static member function")
9842 : G_("constructor cannot be static member function"));
9845 error ((flags
== DTOR_FLAG
)
9846 ? G_("destructors may not be cv-qualified")
9847 : G_("constructors may not be cv-qualified"));
9848 memfn_quals
= TYPE_UNQUALIFIED
;
9853 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9854 error ((flags
== DTOR_FLAG
)
9855 ? "destructors may not be ref-qualified"
9856 : "constructors may not be ref-qualified");
9857 rqual
= REF_QUAL_NONE
;
9860 if (decl_context
== FIELD
9861 && !member_function_or_else (ctype
,
9864 return error_mark_node
;
9866 if (flags
!= DTOR_FLAG
)
9868 /* It's a constructor. */
9873 permerror (input_location
, "constructors cannot be declared virtual");
9876 if (decl_context
== FIELD
9877 && sfk
!= sfk_constructor
)
9878 return error_mark_node
;
9880 if (decl_context
== FIELD
)
9887 /* Cannot be both friend and virtual. */
9888 error ("virtual functions cannot be friends");
9891 if (decl_context
== NORMAL
)
9892 error ("friend declaration not in class definition");
9893 if (current_function_decl
&& funcdef_flag
)
9894 error ("can%'t define friend function %qs in a local "
9898 else if (ctype
&& sfk
== sfk_conversion
)
9902 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9905 if (late_return_type_p
)
9906 error ("a conversion function cannot have a trailing return type");
9909 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9912 if (inner_declarator
9913 && inner_declarator
->kind
== cdk_id
9914 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9915 && arg_types
!= void_list_node
)
9917 error ("destructors may not have parameters");
9918 arg_types
= void_list_node
;
9922 type
= build_function_type (type
, arg_types
);
9923 if (declarator
->std_attributes
)
9926 The optional attribute-specifier-seq appertains to
9927 the function type. */
9928 decl_attributes (&type
, declarator
->std_attributes
,
9936 /* Filter out pointers-to-references and references-to-references.
9937 We can get these if a TYPE_DECL is used. */
9939 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9941 if (declarator
->kind
!= cdk_reference
)
9943 error ("cannot declare pointer to %q#T", type
);
9944 type
= TREE_TYPE (type
);
9947 /* In C++0x, we allow reference to reference declarations
9948 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9949 and template type arguments [14.3.1/4 temp.arg.type]. The
9950 check for direct reference to reference declarations, which
9951 are still forbidden, occurs below. Reasoning behind the change
9952 can be found in DR106, DR540, and the rvalue reference
9954 else if (cxx_dialect
== cxx98
)
9956 error ("cannot declare reference to %q#T", type
);
9957 type
= TREE_TYPE (type
);
9960 else if (VOID_TYPE_P (type
))
9962 if (declarator
->kind
== cdk_reference
)
9963 error ("cannot declare reference to %q#T", type
);
9964 else if (declarator
->kind
== cdk_ptrmem
)
9965 error ("cannot declare pointer to %q#T member", type
);
9968 /* We now know that the TYPE_QUALS don't apply to the decl,
9969 but to the target of the pointer. */
9970 type_quals
= TYPE_UNQUALIFIED
;
9972 /* This code used to handle METHOD_TYPE, but I don't think it's
9973 possible to get it here anymore. */
9974 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9975 if (declarator
->kind
== cdk_ptrmem
9976 && TREE_CODE (type
) == FUNCTION_TYPE
)
9978 memfn_quals
|= type_memfn_quals (type
);
9979 type
= build_memfn_type (type
,
9980 declarator
->u
.pointer
.class_type
,
9983 if (type
== error_mark_node
)
9984 return error_mark_node
;
9986 rqual
= REF_QUAL_NONE
;
9987 memfn_quals
= TYPE_UNQUALIFIED
;
9990 if (TREE_CODE (type
) == FUNCTION_TYPE
9991 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9992 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9993 error (declarator
->kind
== cdk_reference
9994 ? G_("cannot declare reference to qualified function type %qT")
9995 : G_("cannot declare pointer to qualified function type %qT"),
9998 /* When the pointed-to type involves components of variable size,
9999 care must be taken to ensure that the size evaluation code is
10000 emitted early enough to dominate all the possible later uses
10001 and late enough for the variables on which it depends to have
10004 This is expected to happen automatically when the pointed-to
10005 type has a name/declaration of it's own, but special attention
10006 is required if the type is anonymous.
10008 We handle the NORMAL and FIELD contexts here by inserting a
10009 dummy statement that just evaluates the size at a safe point
10010 and ensures it is not deferred until e.g. within a deeper
10011 conditional context (c++/43555).
10013 We expect nothing to be needed here for PARM or TYPENAME.
10014 Evaluating the size at this point for TYPENAME would
10015 actually be incorrect, as we might be in the middle of an
10016 expression with side effects on the pointed-to type size
10017 "arguments" prior to the pointer declaration point and the
10018 size evaluation could end up prior to the side effects. */
10020 if (!TYPE_NAME (type
)
10021 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10022 && at_function_scope_p ()
10023 && variably_modified_type_p (type
, NULL_TREE
))
10024 /* Force evaluation of the SAVE_EXPR. */
10025 finish_expr_stmt (TYPE_SIZE (type
));
10027 if (declarator
->kind
== cdk_reference
)
10029 /* In C++0x, the type we are creating a reference to might be
10030 a typedef which is itself a reference type. In that case,
10031 we follow the reference collapsing rules in
10032 [7.1.3/8 dcl.typedef] to create the final reference type:
10034 "If a typedef TD names a type that is a reference to a type
10035 T, an attempt to create the type 'lvalue reference to cv TD'
10036 creates the type 'lvalue reference to T,' while an attempt
10037 to create the type "rvalue reference to cv TD' creates the
10040 if (VOID_TYPE_P (type
))
10041 /* We already gave an error. */;
10042 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10044 if (declarator
->u
.reference
.rvalue_ref
)
10045 /* Leave type alone. */;
10047 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10050 type
= cp_build_reference_type
10051 (type
, declarator
->u
.reference
.rvalue_ref
);
10053 /* In C++0x, we need this check for direct reference to
10054 reference declarations, which are forbidden by
10055 [8.3.2/5 dcl.ref]. Reference to reference declarations
10056 are only allowed indirectly through typedefs and template
10057 type arguments. Example:
10059 void foo(int & &); // invalid ref-to-ref decl
10061 typedef int & int_ref;
10062 void foo(int_ref &); // valid ref-to-ref decl
10064 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10065 error ("cannot declare reference to %q#T, which is not "
10066 "a typedef or a template type argument", type
);
10068 else if (TREE_CODE (type
) == METHOD_TYPE
)
10069 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10070 else if (declarator
->kind
== cdk_ptrmem
)
10072 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10073 != NAMESPACE_DECL
);
10074 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10075 /* We will already have complained. */
10076 type
= error_mark_node
;
10078 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10082 type
= build_pointer_type (type
);
10084 /* Process a list of type modifier keywords (such as
10085 const or volatile) that were given inside the `*' or `&'. */
10087 if (declarator
->u
.pointer
.qualifiers
)
10090 = cp_build_qualified_type (type
,
10091 declarator
->u
.pointer
.qualifiers
);
10092 type_quals
= cp_type_quals (type
);
10095 /* Apply C++11 attributes to the pointer, and not to the
10096 type pointed to. This is unlike what is done for GNU
10097 attributes above. It is to comply with [dcl.ptr]/1:
10099 [the optional attribute-specifier-seq (7.6.1) appertains
10100 to the pointer and not to the object pointed to]. */
10101 if (declarator
->std_attributes
)
10102 decl_attributes (&type
, declarator
->std_attributes
,
10112 gcc_unreachable ();
10116 /* A `constexpr' specifier used in an object declaration declares
10117 the object as `const'. */
10118 if (constexpr_p
&& innermost_code
!= cdk_function
)
10120 /* DR1688 says that a `constexpr' specifier in combination with
10121 `volatile' is valid. */
10123 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10125 type_quals
|= TYPE_QUAL_CONST
;
10126 type
= cp_build_qualified_type (type
, type_quals
);
10130 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10131 && TREE_CODE (type
) != FUNCTION_TYPE
10132 && TREE_CODE (type
) != METHOD_TYPE
10133 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10135 error ("template-id %qD used as a declarator",
10137 unqualified_id
= dname
;
10140 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10141 qualified with a class-name, turn it into a METHOD_TYPE, unless
10142 we know that the function is static. We take advantage of this
10143 opportunity to do other processing that pertains to entities
10144 explicitly declared to be class members. Note that if DECLARATOR
10145 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10146 would not have exited the loop above. */
10148 && declarator
->u
.id
.qualifying_scope
10149 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10151 ctype
= declarator
->u
.id
.qualifying_scope
;
10152 ctype
= TYPE_MAIN_VARIANT (ctype
);
10153 template_count
= num_template_headers_for_class (ctype
);
10155 if (ctype
== current_class_type
)
10159 permerror (input_location
, "member functions are implicitly friends of their class");
10163 permerror (declarator
->id_loc
,
10164 "extra qualification %<%T::%> on member %qs",
10167 else if (/* If the qualifying type is already complete, then we
10168 can skip the following checks. */
10169 !COMPLETE_TYPE_P (ctype
)
10170 && (/* If the function is being defined, then
10171 qualifying type must certainly be complete. */
10173 /* A friend declaration of "T::f" is OK, even if
10174 "T" is a template parameter. But, if this
10175 function is not a friend, the qualifying type
10176 must be a class. */
10177 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10178 /* For a declaration, the type need not be
10179 complete, if either it is dependent (since there
10180 is no meaningful definition of complete in that
10181 case) or the qualifying class is currently being
10183 || !(dependent_type_p (ctype
)
10184 || currently_open_class (ctype
)))
10185 /* Check that the qualifying type is complete. */
10186 && !complete_type_or_else (ctype
, NULL_TREE
))
10187 return error_mark_node
;
10188 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10190 if (current_class_type
10191 && (!friendp
|| funcdef_flag
))
10193 error (funcdef_flag
10194 ? G_("cannot define member function %<%T::%s%> "
10196 : G_("cannot declare member function %<%T::%s%> "
10198 ctype
, name
, current_class_type
);
10199 return error_mark_node
;
10202 else if (typedef_p
&& current_class_type
)
10204 error ("cannot declare member %<%T::%s%> within %qT",
10205 ctype
, name
, current_class_type
);
10206 return error_mark_node
;
10210 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10211 ctype
= current_class_type
;
10213 /* Now TYPE has the actual type. */
10215 if (returned_attrs
)
10218 *attrlist
= chainon (returned_attrs
, *attrlist
);
10220 attrlist
= &returned_attrs
;
10224 && declarator
->kind
== cdk_id
10225 && declarator
->std_attributes
)
10226 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10227 a declarator-id appertains to the entity that is declared. */
10228 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10230 /* Handle parameter packs. */
10231 if (parameter_pack_p
)
10233 if (decl_context
== PARM
)
10234 /* Turn the type into a pack expansion.*/
10235 type
= make_pack_expansion (type
);
10237 error ("non-parameter %qs cannot be a parameter pack", name
);
10240 /* Did array size calculations overflow or does the array cover more
10241 than half of the address-space? */
10242 if (TREE_CODE (type
) == ARRAY_TYPE
10243 && COMPLETE_TYPE_P (type
)
10244 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10245 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10247 error ("size of array %qs is too large", name
);
10248 /* If we proceed with the array type as it is, we'll eventually
10249 crash in tree_to_[su]hwi(). */
10250 type
= error_mark_node
;
10253 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10254 && !processing_template_decl
10255 && variably_modified_type_p (type
, NULL_TREE
))
10257 if (decl_context
== FIELD
)
10258 error ("data member may not have variably modified type %qT", type
);
10260 error ("parameter may not have variably modified type %qT", type
);
10261 type
= error_mark_node
;
10264 if (explicitp
== 1 || (explicitp
&& friendp
))
10266 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10267 in the declaration of a constructor or conversion function within
10268 a class definition. */
10269 if (!current_class_type
)
10270 error_at (declspecs
->locations
[ds_explicit
],
10271 "%<explicit%> outside class declaration");
10273 error_at (declspecs
->locations
[ds_explicit
],
10274 "%<explicit%> in friend declaration");
10276 error_at (declspecs
->locations
[ds_explicit
],
10277 "only declarations of constructors and conversion operators "
10278 "can be %<explicit%>");
10282 if (storage_class
== sc_mutable
)
10284 if (decl_context
!= FIELD
|| friendp
)
10286 error ("non-member %qs cannot be declared %<mutable%>", name
);
10287 storage_class
= sc_none
;
10289 else if (decl_context
== TYPENAME
|| typedef_p
)
10291 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10292 storage_class
= sc_none
;
10294 else if (TREE_CODE (type
) == FUNCTION_TYPE
10295 || TREE_CODE (type
) == METHOD_TYPE
)
10297 error ("function %qs cannot be declared %<mutable%>", name
);
10298 storage_class
= sc_none
;
10302 error ("static %qs cannot be declared %<mutable%>", name
);
10303 storage_class
= sc_none
;
10305 else if (type_quals
& TYPE_QUAL_CONST
)
10307 error ("const %qs cannot be declared %<mutable%>", name
);
10308 storage_class
= sc_none
;
10310 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10312 permerror (input_location
, "reference %qs cannot be declared "
10313 "%<mutable%>", name
);
10314 storage_class
= sc_none
;
10318 /* If this is declaring a typedef name, return a TYPE_DECL. */
10319 if (typedef_p
&& decl_context
!= TYPENAME
)
10323 /* Note that the grammar rejects storage classes
10324 in typenames, fields or parameters. */
10325 if (current_lang_name
== lang_name_java
)
10326 TYPE_FOR_JAVA (type
) = 1;
10328 /* This declaration:
10330 typedef void f(int) const;
10332 declares a function type which is not a member of any
10333 particular class, but which is cv-qualified; for
10334 example "f S::*" declares a pointer to a const-qualified
10335 member function of S. We record the cv-qualification in the
10337 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10339 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10341 /* We have now dealt with these qualifiers. */
10342 memfn_quals
= TYPE_UNQUALIFIED
;
10343 rqual
= REF_QUAL_NONE
;
10346 if (type_uses_auto (type
))
10348 error ("typedef declared %<auto%>");
10349 type
= error_mark_node
;
10352 if (decl_context
== FIELD
)
10353 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10355 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10356 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10357 error_at (DECL_SOURCE_LOCATION (decl
),
10358 "typedef name may not be a nested-name-specifier");
10359 TREE_TYPE (decl
) = error_mark_node
;
10362 if (decl_context
!= FIELD
)
10364 if (!current_function_decl
)
10365 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10366 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10367 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10368 (current_function_decl
)))
10369 /* The TYPE_DECL is "abstract" because there will be
10370 clones of this constructor/destructor, and there will
10371 be copies of this TYPE_DECL generated in those
10372 clones. The decloning optimization (for space) may
10373 revert this subsequently if it determines that
10374 the clones should share a common implementation. */
10375 DECL_ABSTRACT_P (decl
) = true;
10377 else if (current_class_type
10378 && constructor_name_p (unqualified_id
, current_class_type
))
10379 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10380 "as enclosing class",
10383 /* If the user declares "typedef struct {...} foo" then the
10384 struct will have an anonymous name. Fill that name in now.
10385 Nothing can refer to it, so nothing needs know about the name
10387 if (type
!= error_mark_node
10389 && TYPE_NAME (type
)
10390 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10391 && TYPE_ANONYMOUS_P (type
)
10392 && declspecs
->type_definition_p
10393 && attributes_naming_typedef_ok (*attrlist
)
10394 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10398 /* Replace the anonymous name with the real name everywhere. */
10399 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10401 if (anon_aggrname_p (TYPE_IDENTIFIER (t
)))
10402 /* We do not rename the debug info representing the
10403 anonymous tagged type because the standard says in
10404 [dcl.typedef] that the naming applies only for
10405 linkage purposes. */
10406 /*debug_hooks->set_name (t, decl);*/
10407 TYPE_NAME (t
) = decl
;
10410 if (TYPE_LANG_SPECIFIC (type
))
10411 TYPE_WAS_ANONYMOUS (type
) = 1;
10413 /* If this is a typedef within a template class, the nested
10414 type is a (non-primary) template. The name for the
10415 template needs updating as well. */
10416 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10417 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10418 = TYPE_IDENTIFIER (type
);
10420 /* Adjust linkage now that we aren't anonymous anymore. */
10421 reset_type_linkage (type
);
10423 /* FIXME remangle member functions; member functions of a
10424 type with external linkage have external linkage. */
10428 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10429 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10431 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10432 memfn_quals
!= TYPE_UNQUALIFIED
,
10433 inlinep
, friendp
, raises
!= NULL_TREE
);
10435 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10436 /* Acknowledge that this was written:
10437 `using analias = atype;'. */
10438 TYPE_DECL_ALIAS_P (decl
) = 1;
10443 /* Detect the case of an array type of unspecified size
10444 which came, as such, direct from a typedef name.
10445 We must copy the type, so that the array's domain can be
10446 individually set by the object's initializer. */
10448 if (type
&& typedef_type
10449 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10450 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10451 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10453 /* Detect where we're using a typedef of function type to declare a
10454 function. PARMS will not be set, so we must create it now. */
10456 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10458 tree decls
= NULL_TREE
;
10461 for (args
= TYPE_ARG_TYPES (type
);
10462 args
&& args
!= void_list_node
;
10463 args
= TREE_CHAIN (args
))
10465 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10467 DECL_CHAIN (decl
) = decls
;
10471 parms
= nreverse (decls
);
10473 if (decl_context
!= TYPENAME
)
10475 /* The qualifiers on the function type become the qualifiers on
10476 the non-static member function. */
10477 memfn_quals
|= type_memfn_quals (type
);
10478 rqual
= type_memfn_rqual (type
);
10479 type_quals
= TYPE_UNQUALIFIED
;
10483 /* If this is a type name (such as, in a cast or sizeof),
10484 compute the type and return it now. */
10486 if (decl_context
== TYPENAME
)
10488 /* Note that here we don't care about type_quals. */
10490 /* Special case: "friend class foo" looks like a TYPENAME context. */
10495 error ("%<inline%> specified for friend class declaration");
10501 /* Don't allow friend declaration without a class-key. */
10502 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10503 permerror (input_location
, "template parameters cannot be friends");
10504 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10505 permerror (input_location
, "friend declaration requires class-key, "
10506 "i.e. %<friend class %T::%D%>",
10507 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10509 permerror (input_location
, "friend declaration requires class-key, "
10510 "i.e. %<friend %#T%>",
10514 /* Only try to do this stuff if we didn't already give up. */
10515 if (type
!= integer_type_node
)
10517 /* A friendly class? */
10518 if (current_class_type
)
10519 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10520 /*complain=*/true);
10522 error ("trying to make class %qT a friend of global scope",
10525 type
= void_type_node
;
10528 else if (memfn_quals
|| rqual
)
10530 if (ctype
== NULL_TREE
10531 && TREE_CODE (type
) == METHOD_TYPE
)
10532 ctype
= TYPE_METHOD_BASETYPE (type
);
10535 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10536 /* Core issue #547: need to allow this in template type args.
10537 Allow it in general in C++11 for alias-declarations. */
10538 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10539 && TREE_CODE (type
) == FUNCTION_TYPE
)
10540 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10542 error ("invalid qualifiers on non-member function type");
10547 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10548 && decl_context
!= CATCHPARM
10549 && TREE_CODE (type
) != UNION_TYPE
10552 error ("abstract declarator %qT used as declaration", type
);
10553 return error_mark_node
;
10556 /* Only functions may be declared using an operator-function-id. */
10558 && IDENTIFIER_OPNAME_P (unqualified_id
)
10559 && TREE_CODE (type
) != FUNCTION_TYPE
10560 && TREE_CODE (type
) != METHOD_TYPE
)
10562 error ("declaration of %qD as non-function", unqualified_id
);
10563 return error_mark_node
;
10566 /* We don't check parameter types here because we can emit a better
10567 error message later. */
10568 if (decl_context
!= PARM
)
10570 type
= check_var_type (unqualified_id
, type
);
10571 if (type
== error_mark_node
)
10572 return error_mark_node
;
10575 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10576 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10578 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10580 if (ctype
|| in_namespace
)
10581 error ("cannot use %<::%> in parameter declaration");
10583 if (type_uses_auto (type
))
10585 if (cxx_dialect
>= cxx14
)
10586 error ("%<auto%> parameter not permitted in this context");
10588 error ("parameter declared %<auto%>");
10589 type
= error_mark_node
;
10592 /* A parameter declared as an array of T is really a pointer to T.
10593 One declared as a function is really a pointer to a function.
10594 One declared as a member is really a pointer to member. */
10596 if (TREE_CODE (type
) == ARRAY_TYPE
)
10598 /* Transfer const-ness of array into that of type pointed to. */
10599 type
= build_pointer_type (TREE_TYPE (type
));
10600 type_quals
= TYPE_UNQUALIFIED
;
10601 array_parameter_p
= true;
10603 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10604 type
= build_pointer_type (type
);
10607 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10608 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10610 cp_cv_quals real_quals
= memfn_quals
;
10611 if (cxx_dialect
< cxx14
&& constexpr_p
10612 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10613 real_quals
|= TYPE_QUAL_CONST
;
10614 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10620 if (decl_context
== PARM
)
10622 decl
= cp_build_parm_decl (unqualified_id
, type
);
10623 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10625 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10626 memfn_quals
!= TYPE_UNQUALIFIED
,
10627 inlinep
, friendp
, raises
!= NULL_TREE
);
10629 else if (decl_context
== FIELD
)
10631 if (!staticp
&& !friendp
&& TREE_CODE (type
) != METHOD_TYPE
10632 && type_uses_auto (type
))
10634 error ("non-static data member declared %<auto%>");
10635 type
= error_mark_node
;
10638 /* The C99 flexible array extension. */
10639 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10640 && TYPE_DOMAIN (type
) == NULL_TREE
)
10642 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10643 tf_warning_or_error
);
10644 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10647 if (type
== error_mark_node
)
10649 /* Happens when declaring arrays of sizes which
10650 are error_mark_node, for example. */
10653 else if (in_namespace
&& !friendp
)
10655 /* Something like struct S { int N::j; }; */
10656 error ("invalid use of %<::%>");
10657 return error_mark_node
;
10659 else if (TREE_CODE (type
) == FUNCTION_TYPE
10660 || TREE_CODE (type
) == METHOD_TYPE
)
10663 tree function_context
;
10667 /* This should never happen in pure C++ (the check
10668 could be an assert). It could happen in
10669 Objective-C++ if someone writes invalid code that
10670 uses a function declaration for an instance
10671 variable or property (instance variables and
10672 properties are parsed as FIELD_DECLs, but they are
10673 part of an Objective-C class, not a C++ class).
10674 That code is invalid and is caught by this
10678 error ("declaration of function %qD in invalid context",
10680 return error_mark_node
;
10683 /* ``A union may [ ... ] not [ have ] virtual functions.''
10685 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10687 error ("function %qD declared virtual inside a union",
10689 return error_mark_node
;
10692 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10696 error ("%qD cannot be declared virtual, since it "
10697 "is always static",
10704 /* Check that the name used for a destructor makes sense. */
10705 if (sfk
== sfk_destructor
)
10707 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10711 gcc_assert (friendp
);
10712 error ("expected qualified name in friend declaration "
10713 "for destructor %qD", uqname
);
10714 return error_mark_node
;
10717 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10719 error ("declaration of %qD as member of %qT",
10721 return error_mark_node
;
10725 error ("a destructor cannot be %<constexpr%>");
10726 return error_mark_node
;
10729 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10731 error ("expected qualified name in friend declaration "
10732 "for constructor %qD",
10733 id_declarator
->u
.id
.unqualified_name
);
10734 return error_mark_node
;
10737 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10739 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
10740 if (variable_template_p (tmpl
))
10742 error ("specialization of variable template %qD "
10743 "declared as function", tmpl
);
10744 inform (DECL_SOURCE_LOCATION (tmpl
),
10745 "variable template declared here");
10746 return error_mark_node
;
10750 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10751 function_context
= (ctype
!= NULL_TREE
) ?
10752 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10753 publicp
= (! friendp
|| ! staticp
)
10754 && function_context
== NULL_TREE
;
10756 if (late_return_type_p
)
10757 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10759 decl
= grokfndecl (ctype
, type
,
10760 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10761 ? unqualified_id
: dname
,
10764 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10765 friendp
? -1 : 0, friendp
, publicp
,
10766 inlinep
| (2 * constexpr_p
),
10767 initialized
== SD_DELETED
, sfk
,
10768 funcdef_flag
, template_count
, in_namespace
,
10769 attrlist
, declarator
->id_loc
);
10770 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10771 if (decl
== NULL_TREE
)
10772 return error_mark_node
;
10774 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10775 /* The decl and setting of decl_attr is also turned off. */
10776 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10779 /* [class.conv.ctor]
10781 A constructor declared without the function-specifier
10782 explicit that can be called with a single parameter
10783 specifies a conversion from the type of its first
10784 parameter to the type of its class. Such a constructor
10785 is called a converting constructor. */
10786 if (explicitp
== 2)
10787 DECL_NONCONVERTING_P (decl
) = 1;
10789 else if (!staticp
&& !dependent_type_p (type
)
10790 && !COMPLETE_TYPE_P (complete_type (type
))
10791 && (TREE_CODE (type
) != ARRAY_TYPE
10792 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10793 || initialized
== 0))
10795 if (unqualified_id
)
10797 error ("field %qD has incomplete type %qT",
10798 unqualified_id
, type
);
10799 cxx_incomplete_type_inform (strip_array_types (type
));
10802 error ("name %qT has incomplete type", type
);
10804 type
= error_mark_node
;
10811 error ("%qE is neither function nor member function; "
10812 "cannot be declared friend", unqualified_id
);
10820 /* Friends are treated specially. */
10821 if (ctype
== current_class_type
)
10822 ; /* We already issued a permerror. */
10823 else if (decl
&& DECL_NAME (decl
))
10825 if (template_class_depth (current_class_type
) == 0)
10827 decl
= check_explicit_specialization
10828 (unqualified_id
, decl
, template_count
,
10829 2 * funcdef_flag
+ 4);
10830 if (decl
== error_mark_node
)
10831 return error_mark_node
;
10834 decl
= do_friend (ctype
, unqualified_id
, decl
,
10840 return error_mark_node
;
10843 /* Structure field. It may not be a function, except for C++. */
10845 if (decl
== NULL_TREE
)
10849 /* C++ allows static class members. All other work
10850 for this is done by grokfield. */
10851 decl
= build_lang_decl_loc (declarator
10852 ? declarator
->id_loc
10854 VAR_DECL
, unqualified_id
, type
);
10855 set_linkage_for_static_data_member (decl
);
10856 /* Even if there is an in-class initialization, DECL
10857 is considered undefined until an out-of-class
10858 definition is provided. */
10859 DECL_EXTERNAL (decl
) = 1;
10863 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10864 if (declspecs
->gnu_thread_keyword_p
)
10865 DECL_GNU_TLS_P (decl
) = true;
10868 if (constexpr_p
&& !initialized
)
10870 error ("constexpr static data member %qD must have an "
10871 "initializer", decl
);
10872 constexpr_p
= false;
10879 error ("non-static data member %qE declared %<constexpr%>",
10881 constexpr_p
= false;
10883 decl
= build_decl (input_location
,
10884 FIELD_DECL
, unqualified_id
, type
);
10885 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10886 if (bitfield
&& !unqualified_id
)
10887 TREE_NO_WARNING (decl
) = 1;
10889 if (storage_class
== sc_mutable
)
10891 DECL_MUTABLE_P (decl
) = 1;
10892 storage_class
= sc_none
;
10897 /* An attempt is being made to initialize a non-static
10898 member. This is new in C++11. */
10899 maybe_warn_cpp0x (CPP0X_NSDMI
);
10901 /* If this has been parsed with static storage class, but
10902 errors forced staticp to be cleared, ensure NSDMI is
10904 if (declspecs
->storage_class
== sc_static
)
10905 DECL_INITIAL (decl
) = error_mark_node
;
10909 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10910 memfn_quals
!= TYPE_UNQUALIFIED
,
10911 inlinep
, friendp
, raises
!= NULL_TREE
);
10914 else if (TREE_CODE (type
) == FUNCTION_TYPE
10915 || TREE_CODE (type
) == METHOD_TYPE
)
10917 tree original_name
;
10920 if (!unqualified_id
)
10921 return error_mark_node
;
10923 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10924 original_name
= dname
;
10926 original_name
= unqualified_id
;
10928 if (storage_class
== sc_auto
)
10929 error ("storage class %<auto%> invalid for function %qs", name
);
10930 else if (storage_class
== sc_register
)
10931 error ("storage class %<register%> invalid for function %qs", name
);
10934 if (declspecs
->gnu_thread_keyword_p
)
10935 error ("storage class %<__thread%> invalid for function %qs",
10938 error ("storage class %<thread_local%> invalid for function %qs",
10942 if (virt_specifiers
)
10943 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10944 /* Function declaration not at top level.
10945 Storage classes other than `extern' are not allowed
10946 and `extern' makes no difference. */
10947 if (! toplevel_bindings_p ()
10948 && (storage_class
== sc_static
10949 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10952 if (storage_class
== sc_static
)
10953 pedwarn (input_location
, OPT_Wpedantic
,
10954 "%<static%> specified invalid for function %qs "
10955 "declared out of global scope", name
);
10957 pedwarn (input_location
, OPT_Wpedantic
,
10958 "%<inline%> specifier invalid for function %qs "
10959 "declared out of global scope", name
);
10962 if (ctype
== NULL_TREE
)
10966 error ("virtual non-class function %qs", name
);
10969 else if (sfk
== sfk_constructor
10970 || sfk
== sfk_destructor
)
10972 error (funcdef_flag
10973 ? G_("%qs defined in a non-class scope")
10974 : G_("%qs declared in a non-class scope"), name
);
10979 /* Record whether the function is public. */
10980 publicp
= (ctype
!= NULL_TREE
10981 || storage_class
!= sc_static
);
10983 if (late_return_type_p
)
10984 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10986 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10987 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10989 publicp
, inlinep
| (2 * constexpr_p
),
10990 initialized
== SD_DELETED
, sfk
,
10992 template_count
, in_namespace
, attrlist
,
10993 declarator
->id_loc
);
10994 if (decl
== NULL_TREE
)
10995 return error_mark_node
;
10999 int invalid_static
= 0;
11001 /* Don't allow a static member function in a class, and forbid
11002 declaring main to be static. */
11003 if (TREE_CODE (type
) == METHOD_TYPE
)
11005 permerror (input_location
, "cannot declare member function %qD to have "
11006 "static linkage", decl
);
11007 invalid_static
= 1;
11009 else if (current_function_decl
)
11011 /* FIXME need arm citation */
11012 error ("cannot declare static function inside another function");
11013 invalid_static
= 1;
11016 if (invalid_static
)
11019 storage_class
= sc_none
;
11025 /* It's a variable. */
11027 /* An uninitialized decl with `extern' is a reference. */
11028 decl
= grokvardecl (type
, dname
, unqualified_id
,
11031 (type_quals
& TYPE_QUAL_CONST
) != 0,
11033 ctype
? ctype
: in_namespace
);
11034 if (decl
== NULL_TREE
)
11035 return error_mark_node
;
11037 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11038 memfn_quals
!= TYPE_UNQUALIFIED
,
11039 inlinep
, friendp
, raises
!= NULL_TREE
);
11043 DECL_CONTEXT (decl
) = ctype
;
11046 permerror (input_location
, "%<static%> may not be used when defining "
11047 "(as opposed to declaring) a static data member");
11049 storage_class
= sc_none
;
11051 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11053 error ("static member %qD declared %<register%>", decl
);
11054 storage_class
= sc_none
;
11056 if (storage_class
== sc_extern
&& pedantic
)
11058 pedwarn (input_location
, OPT_Wpedantic
,
11059 "cannot explicitly declare member %q#D to have "
11060 "extern linkage", decl
);
11061 storage_class
= sc_none
;
11064 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11066 error ("declaration of constexpr variable %qD is not a definition",
11068 constexpr_p
= false;
11072 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11074 if (toplevel_bindings_p ())
11076 /* It's common practice (and completely valid) to have a const
11077 be initialized and declared extern. */
11078 if (!(type_quals
& TYPE_QUAL_CONST
))
11079 warning (0, "%qs initialized and declared %<extern%>", name
);
11083 error ("%qs has both %<extern%> and initializer", name
);
11084 return error_mark_node
;
11088 /* Record `register' declaration for warnings on &
11089 and in case doing stupid register allocation. */
11091 if (storage_class
== sc_register
)
11092 DECL_REGISTER (decl
) = 1;
11093 else if (storage_class
== sc_extern
)
11094 DECL_THIS_EXTERN (decl
) = 1;
11095 else if (storage_class
== sc_static
)
11096 DECL_THIS_STATIC (decl
) = 1;
11098 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11099 if (constexpr_p
&& VAR_P (decl
))
11100 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11102 /* Record constancy and volatility on the DECL itself . There's
11103 no need to do this when processing a template; we'll do this
11104 for the instantiated declaration based on the type of DECL. */
11105 if (!processing_template_decl
)
11106 cp_apply_type_quals_to_decl (type_quals
, decl
);
11112 /* Subroutine of start_function. Ensure that each of the parameter
11113 types (as listed in PARMS) is complete, as is required for a
11114 function definition. */
11117 require_complete_types_for_parms (tree parms
)
11119 for (; parms
; parms
= DECL_CHAIN (parms
))
11121 if (dependent_type_p (TREE_TYPE (parms
)))
11123 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11124 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11126 relayout_decl (parms
);
11127 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11130 /* grokparms or complete_type_or_else will have already issued
11132 TREE_TYPE (parms
) = error_mark_node
;
11136 /* Returns nonzero if T is a local variable. */
11139 local_variable_p (const_tree t
)
11142 /* A VAR_DECL with a context that is a _TYPE is a static data
11144 && !TYPE_P (CP_DECL_CONTEXT (t
))
11145 /* Any other non-local variable must be at namespace scope. */
11146 && !DECL_NAMESPACE_SCOPE_P (t
))
11147 || (TREE_CODE (t
) == PARM_DECL
))
11153 /* Like local_variable_p, but suitable for use as a tree-walking
11157 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11160 if (local_variable_p (*tp
)
11161 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11163 else if (TYPE_P (*tp
))
11164 *walk_subtrees
= 0;
11169 /* Check that ARG, which is a default-argument expression for a
11170 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11171 something goes wrong. DECL may also be a _TYPE node, rather than a
11172 DECL, if there is no DECL available. */
11175 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11180 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11181 /* We get a DEFAULT_ARG when looking at an in-class declaration
11182 with a default argument. Ignore the argument for now; we'll
11183 deal with it after the class is complete. */
11192 decl_type
= TREE_TYPE (decl
);
11194 if (arg
== error_mark_node
11195 || decl
== error_mark_node
11196 || TREE_TYPE (arg
) == error_mark_node
11197 || decl_type
== error_mark_node
)
11198 /* Something already went wrong. There's no need to check
11200 return error_mark_node
;
11202 /* [dcl.fct.default]
11204 A default argument expression is implicitly converted to the
11206 ++cp_unevaluated_operand
;
11207 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11209 --cp_unevaluated_operand
;
11211 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
11213 if (TYPE_PTR_OR_PTRMEM_P (decl_type
)
11214 && null_ptr_cst_p (arg
))
11215 return nullptr_node
;
11217 /* [dcl.fct.default]
11219 Local variables shall not be used in default argument
11222 The keyword `this' shall not be used in a default argument of a
11223 member function. */
11224 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11227 if (complain
& tf_warning_or_error
)
11229 if (DECL_NAME (var
) == this_identifier
)
11230 permerror (input_location
, "default argument %qE uses %qD",
11233 error ("default argument %qE uses local variable %qD", arg
, var
);
11235 return error_mark_node
;
11242 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11245 type_is_deprecated (tree type
)
11247 enum tree_code code
;
11248 if (TREE_DEPRECATED (type
))
11250 if (TYPE_NAME (type
)
11251 && TREE_DEPRECATED (TYPE_NAME (type
)))
11254 /* Do warn about using typedefs to a deprecated class. */
11255 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11256 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11258 code
= TREE_CODE (type
);
11260 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11261 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11262 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11263 return type_is_deprecated (TREE_TYPE (type
));
11265 if (TYPE_PTRMEMFUNC_P (type
))
11266 return type_is_deprecated
11267 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11272 /* Decode the list of parameter types for a function type.
11273 Given the list of things declared inside the parens,
11274 return a list of types.
11276 If this parameter does not end with an ellipsis, we append
11279 *PARMS is set to the chain of PARM_DECLs created. */
11282 grokparms (tree parmlist
, tree
*parms
)
11284 tree result
= NULL_TREE
;
11285 tree decls
= NULL_TREE
;
11289 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11291 tree type
= NULL_TREE
;
11292 tree init
= TREE_PURPOSE (parm
);
11293 tree decl
= TREE_VALUE (parm
);
11294 const char *errmsg
;
11296 if (parm
== void_list_node
)
11299 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11302 type
= TREE_TYPE (decl
);
11303 if (VOID_TYPE_P (type
))
11305 if (same_type_p (type
, void_type_node
)
11307 && !DECL_NAME (decl
) && !result
11308 && TREE_CHAIN (parm
) == void_list_node
)
11309 /* DR 577: A parameter list consisting of a single
11310 unnamed parameter of non-dependent type 'void'. */
11312 else if (cv_qualified_p (type
))
11313 error_at (DECL_SOURCE_LOCATION (decl
),
11314 "invalid use of cv-qualified type %qT in "
11315 "parameter declaration", type
);
11317 error_at (DECL_SOURCE_LOCATION (decl
),
11318 "invalid use of type %<void%> in parameter "
11320 /* It's not a good idea to actually create parameters of
11321 type `void'; other parts of the compiler assume that a
11322 void type terminates the parameter list. */
11323 type
= error_mark_node
;
11324 TREE_TYPE (decl
) = error_mark_node
;
11327 if (type
!= error_mark_node
11328 && TYPE_FOR_JAVA (type
)
11329 && MAYBE_CLASS_TYPE_P (type
))
11331 error ("parameter %qD has Java class type", decl
);
11332 type
= error_mark_node
;
11333 TREE_TYPE (decl
) = error_mark_node
;
11337 if (type
!= error_mark_node
11338 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11341 type
= error_mark_node
;
11342 TREE_TYPE (decl
) = error_mark_node
;
11345 if (type
!= error_mark_node
)
11347 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11349 tree deptype
= type_is_deprecated (type
);
11351 warn_deprecated_use (deptype
, NULL_TREE
);
11354 /* Top-level qualifiers on the parameters are
11355 ignored for function types. */
11356 type
= cp_build_qualified_type (type
, 0);
11357 if (TREE_CODE (type
) == METHOD_TYPE
)
11359 error ("parameter %qD invalidly declared method type", decl
);
11360 type
= build_pointer_type (type
);
11361 TREE_TYPE (decl
) = type
;
11363 else if (abstract_virtuals_error (decl
, type
))
11364 any_error
= 1; /* Seems like a good idea. */
11365 else if (POINTER_TYPE_P (type
))
11367 /* [dcl.fct]/6, parameter types cannot contain pointers
11368 (references) to arrays of unknown bound. */
11369 tree t
= TREE_TYPE (type
);
11370 int ptr
= TYPE_PTR_P (type
);
11374 if (TYPE_PTR_P (t
))
11376 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11378 else if (!TYPE_DOMAIN (t
))
11382 if (TREE_CODE (t
) == ARRAY_TYPE
)
11384 ? G_("parameter %qD includes pointer to array of "
11385 "unknown bound %qT")
11386 : G_("parameter %qD includes reference to array of "
11387 "unknown bound %qT"),
11393 else if (init
&& !processing_template_decl
)
11394 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11397 DECL_CHAIN (decl
) = decls
;
11399 result
= tree_cons (init
, type
, result
);
11401 decls
= nreverse (decls
);
11402 result
= nreverse (result
);
11404 result
= chainon (result
, void_list_node
);
11411 /* D is a constructor or overloaded `operator='.
11413 Let T be the class in which D is declared. Then, this function
11416 -1 if D's is an ill-formed constructor or copy assignment operator
11417 whose first parameter is of type `T'.
11418 0 if D is not a copy constructor or copy assignment
11420 1 if D is a copy constructor or copy assignment operator whose
11421 first parameter is a reference to non-const qualified T.
11422 2 if D is a copy constructor or copy assignment operator whose
11423 first parameter is a reference to const qualified T.
11425 This function can be used as a predicate. Positive values indicate
11426 a copy constructor and nonzero values indicate a copy assignment
11430 copy_fn_p (const_tree d
)
11436 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11438 if (TREE_CODE (d
) == TEMPLATE_DECL
11439 || (DECL_TEMPLATE_INFO (d
)
11440 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11441 /* Instantiations of template member functions are never copy
11442 functions. Note that member functions of templated classes are
11443 represented as template functions internally, and we must
11444 accept those as copy functions. */
11447 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11451 arg_type
= TREE_VALUE (args
);
11452 if (arg_type
== error_mark_node
)
11455 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11457 /* Pass by value copy assignment operator. */
11460 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11461 && !TYPE_REF_IS_RVALUE (arg_type
)
11462 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11464 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11470 args
= TREE_CHAIN (args
);
11472 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11473 /* There are more non-optional args. */
11479 /* D is a constructor or overloaded `operator='.
11481 Let T be the class in which D is declared. Then, this function
11482 returns true when D is a move constructor or move assignment
11483 operator, false otherwise. */
11486 move_fn_p (const_tree d
)
11488 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11490 if (cxx_dialect
== cxx98
)
11491 /* There are no move constructors if we are in C++98 mode. */
11494 if (TREE_CODE (d
) == TEMPLATE_DECL
11495 || (DECL_TEMPLATE_INFO (d
)
11496 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11497 /* Instantiations of template member functions are never move
11498 functions. Note that member functions of templated classes are
11499 represented as template functions internally, and we must
11500 accept those as move functions. */
11503 return move_signature_fn_p (d
);
11506 /* D is a constructor or overloaded `operator='.
11508 Then, this function returns true when D has the same signature as a move
11509 constructor or move assignment operator (because either it is such a
11510 ctor/op= or it is a template specialization with the same signature),
11511 false otherwise. */
11514 move_signature_fn_p (const_tree d
)
11518 bool result
= false;
11520 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11524 arg_type
= TREE_VALUE (args
);
11525 if (arg_type
== error_mark_node
)
11528 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11529 && TYPE_REF_IS_RVALUE (arg_type
)
11530 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11534 args
= TREE_CHAIN (args
);
11536 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11537 /* There are more non-optional args. */
11543 /* Remember any special properties of member function DECL. */
11546 grok_special_member_properties (tree decl
)
11550 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11553 class_type
= DECL_CONTEXT (decl
);
11554 if (DECL_CONSTRUCTOR_P (decl
))
11556 int ctor
= copy_fn_p (decl
);
11558 if (!DECL_ARTIFICIAL (decl
))
11559 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11565 A non-template constructor for class X is a copy
11566 constructor if its first parameter is of type X&, const
11567 X&, volatile X& or const volatile X&, and either there
11568 are no other parameters or else all other parameters have
11569 default arguments. */
11570 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11571 if (user_provided_p (decl
))
11572 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11574 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11576 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11577 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11578 else if (move_fn_p (decl
) && user_provided_p (decl
))
11579 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11580 else if (is_list_ctor (decl
))
11581 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11583 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11584 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11585 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11587 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11591 A non-template assignment operator for class X is a copy
11592 assignment operator if its parameter is of type X, X&, const
11593 X&, volatile X& or const volatile X&. */
11595 int assop
= copy_fn_p (decl
);
11599 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11600 if (user_provided_p (decl
))
11601 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11603 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11605 else if (move_fn_p (decl
) && user_provided_p (decl
))
11606 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11608 /* Destructors are handled in check_methods. */
11611 /* Check a constructor DECL has the correct form. Complains
11612 if the class has a constructor of the form X(X). */
11615 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11617 int ctor_parm
= copy_fn_p (decl
);
11623 A declaration of a constructor for a class X is ill-formed if
11624 its first parameter is of type (optionally cv-qualified) X
11625 and either there are no other parameters or else all other
11626 parameters have default arguments.
11628 We *don't* complain about member template instantiations that
11629 have this form, though; they can occur as we try to decide
11630 what constructor to use during overload resolution. Since
11631 overload resolution will never prefer such a constructor to
11632 the non-template copy constructor (which is either explicitly
11633 or implicitly defined), there's no need to worry about their
11634 existence. Theoretically, they should never even be
11635 instantiated, but that's hard to forestall. */
11636 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11644 /* An operator with this code is unary, but can also be binary. */
11647 ambi_op_p (enum tree_code code
)
11649 return (code
== INDIRECT_REF
11650 || code
== ADDR_EXPR
11651 || code
== UNARY_PLUS_EXPR
11652 || code
== NEGATE_EXPR
11653 || code
== PREINCREMENT_EXPR
11654 || code
== PREDECREMENT_EXPR
);
11657 /* An operator with this name can only be unary. */
11660 unary_op_p (enum tree_code code
)
11662 return (code
== TRUTH_NOT_EXPR
11663 || code
== BIT_NOT_EXPR
11664 || code
== COMPONENT_REF
11665 || code
== TYPE_EXPR
);
11668 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11669 errors are issued for invalid declarations. */
11672 grok_op_properties (tree decl
, bool complain
)
11674 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11676 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11677 tree name
= DECL_NAME (decl
);
11678 enum tree_code operator_code
;
11683 /* Count the number of arguments and check for ellipsis. */
11684 for (argtype
= argtypes
, arity
= 0;
11685 argtype
&& argtype
!= void_list_node
;
11686 argtype
= TREE_CHAIN (argtype
))
11688 ellipsis_p
= !argtype
;
11690 class_type
= DECL_CONTEXT (decl
);
11691 if (class_type
&& !CLASS_TYPE_P (class_type
))
11692 class_type
= NULL_TREE
;
11694 if (DECL_CONV_FN_P (decl
))
11695 operator_code
= TYPE_EXPR
;
11699 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11700 if (ansi_opname (CODE) == name) \
11702 operator_code = (CODE); \
11705 else if (ansi_assopname (CODE) == name) \
11707 operator_code = (CODE); \
11708 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11712 #include "operators.def"
11713 #undef DEF_OPERATOR
11715 gcc_unreachable ();
11718 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11719 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11722 switch (operator_code
)
11725 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11729 TYPE_GETS_DELETE (class_type
) |= 1;
11733 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11736 case VEC_DELETE_EXPR
:
11737 TYPE_GETS_DELETE (class_type
) |= 2;
11744 /* [basic.std.dynamic.allocation]/1:
11746 A program is ill-formed if an allocation function is declared
11747 in a namespace scope other than global scope or declared static
11750 The same also holds true for deallocation functions. */
11751 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11752 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11754 if (DECL_NAMESPACE_SCOPE_P (decl
))
11756 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11758 error ("%qD may not be declared within a namespace", decl
);
11761 else if (!TREE_PUBLIC (decl
))
11763 error ("%qD may not be declared as static", decl
);
11769 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11771 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11772 DECL_IS_OPERATOR_NEW (decl
) = 1;
11774 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11775 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11778 /* An operator function must either be a non-static member function
11779 or have at least one parameter of a class, a reference to a class,
11780 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11781 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11783 if (operator_code
== TYPE_EXPR
11784 || operator_code
== CALL_EXPR
11785 || operator_code
== COMPONENT_REF
11786 || operator_code
== ARRAY_REF
11787 || operator_code
== NOP_EXPR
)
11789 error ("%qD must be a nonstatic member function", decl
);
11796 if (DECL_STATIC_FUNCTION_P (decl
))
11798 error ("%qD must be either a non-static member "
11799 "function or a non-member function", decl
);
11803 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11805 tree arg
= non_reference (TREE_VALUE (p
));
11806 if (arg
== error_mark_node
)
11809 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11810 because these checks are performed even on
11811 template functions. */
11812 if (MAYBE_CLASS_TYPE_P (arg
)
11813 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11817 if (!p
|| p
== void_list_node
)
11820 error ("%qD must have an argument of class or "
11821 "enumerated type", decl
);
11827 /* There are no restrictions on the arguments to an overloaded
11829 if (operator_code
== CALL_EXPR
)
11832 /* Warn about conversion operators that will never be used. */
11833 if (IDENTIFIER_TYPENAME_P (name
)
11834 && ! DECL_TEMPLATE_INFO (decl
)
11836 /* Warn only declaring the function; there is no need to
11837 warn again about out-of-class definitions. */
11838 && class_type
== current_class_type
)
11840 tree t
= TREE_TYPE (name
);
11841 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11844 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11846 if (VOID_TYPE_P (t
))
11847 warning (OPT_Wconversion
,
11849 ? G_("conversion to a reference to void "
11850 "will never use a type conversion operator")
11851 : G_("conversion to void "
11852 "will never use a type conversion operator"));
11853 else if (class_type
)
11855 if (t
== class_type
)
11856 warning (OPT_Wconversion
,
11858 ? G_("conversion to a reference to the same type "
11859 "will never use a type conversion operator")
11860 : G_("conversion to the same type "
11861 "will never use a type conversion operator"));
11862 /* Don't force t to be complete here. */
11863 else if (MAYBE_CLASS_TYPE_P (t
)
11864 && COMPLETE_TYPE_P (t
)
11865 && DERIVED_FROM_P (t
, class_type
))
11866 warning (OPT_Wconversion
,
11868 ? G_("conversion to a reference to a base class "
11869 "will never use a type conversion operator")
11870 : G_("conversion to a base class "
11871 "will never use a type conversion operator"));
11876 if (operator_code
== COND_EXPR
)
11879 error ("ISO C++ prohibits overloading operator ?:");
11882 else if (ellipsis_p
)
11884 error ("%qD must not have variable number of arguments", decl
);
11887 else if (ambi_op_p (operator_code
))
11890 /* We pick the one-argument operator codes by default, so
11891 we don't have to change anything. */
11893 else if (arity
== 2)
11895 /* If we thought this was a unary operator, we now know
11896 it to be a binary operator. */
11897 switch (operator_code
)
11900 operator_code
= MULT_EXPR
;
11904 operator_code
= BIT_AND_EXPR
;
11907 case UNARY_PLUS_EXPR
:
11908 operator_code
= PLUS_EXPR
;
11912 operator_code
= MINUS_EXPR
;
11915 case PREINCREMENT_EXPR
:
11916 operator_code
= POSTINCREMENT_EXPR
;
11919 case PREDECREMENT_EXPR
:
11920 operator_code
= POSTDECREMENT_EXPR
;
11924 gcc_unreachable ();
11927 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11929 if ((operator_code
== POSTINCREMENT_EXPR
11930 || operator_code
== POSTDECREMENT_EXPR
)
11931 && ! processing_template_decl
11932 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11935 error ("postfix %qD must take %<int%> as its argument",
11938 error ("postfix %qD must take %<int%> as its second "
11946 error ("%qD must take either zero or one argument", decl
);
11948 error ("%qD must take either one or two arguments", decl
);
11952 /* More Effective C++ rule 6. */
11954 && (operator_code
== POSTINCREMENT_EXPR
11955 || operator_code
== POSTDECREMENT_EXPR
11956 || operator_code
== PREINCREMENT_EXPR
11957 || operator_code
== PREDECREMENT_EXPR
))
11959 tree arg
= TREE_VALUE (argtypes
);
11960 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11961 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11962 arg
= TREE_TYPE (arg
);
11963 arg
= TYPE_MAIN_VARIANT (arg
);
11964 if (operator_code
== PREINCREMENT_EXPR
11965 || operator_code
== PREDECREMENT_EXPR
)
11967 if (TREE_CODE (ret
) != REFERENCE_TYPE
11968 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11970 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11971 build_reference_type (arg
));
11975 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11976 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11980 else if (unary_op_p (operator_code
))
11985 error ("%qD must take %<void%>", decl
);
11987 error ("%qD must take exactly one argument", decl
);
11991 else /* if (binary_op_p (operator_code)) */
11996 error ("%qD must take exactly one argument", decl
);
11998 error ("%qD must take exactly two arguments", decl
);
12002 /* More Effective C++ rule 7. */
12004 && (operator_code
== TRUTH_ANDIF_EXPR
12005 || operator_code
== TRUTH_ORIF_EXPR
12006 || operator_code
== COMPOUND_EXPR
))
12007 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12011 /* Effective C++ rule 23. */
12014 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12015 && (operator_code
== PLUS_EXPR
12016 || operator_code
== MINUS_EXPR
12017 || operator_code
== TRUNC_DIV_EXPR
12018 || operator_code
== MULT_EXPR
12019 || operator_code
== TRUNC_MOD_EXPR
)
12020 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12021 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12023 /* [over.oper]/8 */
12024 for (; argtypes
&& argtypes
!= void_list_node
;
12025 argtypes
= TREE_CHAIN (argtypes
))
12026 if (TREE_PURPOSE (argtypes
))
12028 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12029 if (operator_code
== POSTINCREMENT_EXPR
12030 || operator_code
== POSTDECREMENT_EXPR
)
12032 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12037 error ("%qD cannot have default arguments", decl
);
12045 /* Return a string giving the keyword associate with CODE. */
12047 static const char *
12048 tag_name (enum tag_types code
)
12060 case typename_type
:
12063 gcc_unreachable ();
12067 /* Name lookup in an elaborated-type-specifier (after the keyword
12068 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12069 elaborated-type-specifier is invalid, issue a diagnostic and return
12070 error_mark_node; otherwise, return the *_TYPE to which it referred.
12071 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12074 check_elaborated_type_specifier (enum tag_types tag_code
,
12076 bool allow_template_p
)
12082 struct S { struct S *p; };
12084 name lookup will find the TYPE_DECL for the implicit "S::S"
12085 typedef. Adjust for that here. */
12086 if (DECL_SELF_REFERENCE_P (decl
))
12087 decl
= TYPE_NAME (TREE_TYPE (decl
));
12089 type
= TREE_TYPE (decl
);
12091 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12092 is false for this case as well. */
12093 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12095 error ("using template type parameter %qT after %qs",
12096 type
, tag_name (tag_code
));
12097 return error_mark_node
;
12099 /* Accept template template parameters. */
12100 else if (allow_template_p
12101 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12102 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12106 If the identifier resolves to a typedef-name or the
12107 simple-template-id resolves to an alias template
12108 specialization, the elaborated-type-specifier is ill-formed.
12110 In other words, the only legitimate declaration to use in the
12111 elaborated type specifier is the implicit typedef created when
12112 the type is declared. */
12113 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12114 && !DECL_SELF_REFERENCE_P (decl
)
12115 && tag_code
!= typename_type
)
12117 if (alias_template_specialization_p (type
))
12118 error ("using alias template specialization %qT after %qs",
12119 type
, tag_name (tag_code
));
12121 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12122 inform (DECL_SOURCE_LOCATION (decl
),
12123 "%qD has a previous declaration here", decl
);
12124 return error_mark_node
;
12126 else if (TREE_CODE (type
) != RECORD_TYPE
12127 && TREE_CODE (type
) != UNION_TYPE
12128 && tag_code
!= enum_type
12129 && tag_code
!= typename_type
)
12131 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12132 inform (input_location
, "%q+T has a previous declaration here", type
);
12133 return error_mark_node
;
12135 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12136 && tag_code
== enum_type
)
12138 error ("%qT referred to as enum", type
);
12139 inform (input_location
, "%q+T has a previous declaration here", type
);
12140 return error_mark_node
;
12142 else if (!allow_template_p
12143 && TREE_CODE (type
) == RECORD_TYPE
12144 && CLASSTYPE_IS_TEMPLATE (type
))
12146 /* If a class template appears as elaborated type specifier
12147 without a template header such as:
12149 template <class T> class C {};
12150 void f(class C); // No template header here
12152 then the required template argument is missing. */
12153 error ("template argument required for %<%s %T%>",
12154 tag_name (tag_code
),
12155 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12156 return error_mark_node
;
12162 /* Lookup NAME in elaborate type specifier in scope according to
12163 SCOPE and issue diagnostics if necessary.
12164 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12165 found, and ERROR_MARK_NODE for type error. */
12168 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12169 tag_scope scope
, bool template_header_p
)
12173 if (scope
== ts_global
)
12175 /* First try ordinary name lookup, ignoring hidden class name
12176 injected via friend declaration. */
12177 decl
= lookup_name_prefer_type (name
, 2);
12178 decl
= strip_using_decl (decl
);
12179 /* If that fails, the name will be placed in the smallest
12180 non-class, non-function-prototype scope according to 3.3.1/5.
12181 We may already have a hidden name declared as friend in this
12182 scope. So lookup again but not ignoring hidden names.
12183 If we find one, that name will be made visible rather than
12184 creating a new tag. */
12186 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12189 decl
= lookup_type_scope (name
, scope
);
12192 && (DECL_CLASS_TEMPLATE_P (decl
)
12193 /* If scope is ts_current we're defining a class, so ignore a
12194 template template parameter. */
12195 || (scope
!= ts_current
12196 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12197 decl
= DECL_TEMPLATE_RESULT (decl
);
12199 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12201 /* Look for invalid nested type:
12205 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12207 error ("%qD has the same name as the class in which it is "
12210 return error_mark_node
;
12213 /* Two cases we need to consider when deciding if a class
12214 template is allowed as an elaborated type specifier:
12215 1. It is a self reference to its own class.
12216 2. It comes with a template header.
12220 template <class T> class C {
12221 class C *c1; // DECL_SELF_REFERENCE_P is true
12224 template <class U> class C; // template_header_p is true
12225 template <class T> class C<T>::D {
12226 class C *c2; // DECL_SELF_REFERENCE_P is true
12229 t
= check_elaborated_type_specifier (tag_code
,
12232 | DECL_SELF_REFERENCE_P (decl
));
12235 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12237 error ("reference to %qD is ambiguous", name
);
12238 print_candidates (decl
);
12239 return error_mark_node
;
12245 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12246 Define the tag as a forward-reference if it is not defined.
12248 If a declaration is given, process it here, and report an error if
12249 multiple declarations are not identical.
12251 SCOPE is TS_CURRENT when this is also a definition. Only look in
12252 the current frame for the name (since C++ allows new names in any
12253 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12254 declaration. Only look beginning from the current scope outward up
12255 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12257 TEMPLATE_HEADER_P is true when this declaration is preceded by
12258 a set of template parameters. */
12261 xref_tag_1 (enum tag_types tag_code
, tree name
,
12262 tag_scope orig_scope
, bool template_header_p
)
12264 enum tree_code code
;
12266 tree context
= NULL_TREE
;
12269 gcc_assert (identifier_p (name
));
12275 code
= RECORD_TYPE
;
12281 code
= ENUMERAL_TYPE
;
12284 gcc_unreachable ();
12287 if (orig_scope
== ts_lambda
)
12288 scope
= ts_current
;
12290 scope
= orig_scope
;
12292 /* In case of anonymous name, xref_tag is only called to
12293 make type node and push name. Name lookup is not required. */
12294 if (anon_aggrname_p (name
))
12297 t
= lookup_and_check_tag (tag_code
, name
,
12298 scope
, template_header_p
);
12300 if (t
== error_mark_node
)
12301 return error_mark_node
;
12303 if (scope
!= ts_current
&& t
&& current_class_type
12304 && template_class_depth (current_class_type
)
12305 && template_header_p
)
12307 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12310 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12311 definition of this tag. Since, in addition, we are currently
12312 processing a (member) template declaration of a template
12313 class, we must be very careful; consider:
12320 { template <class V>
12321 friend struct S1; };
12323 Here, the S2::S1 declaration should not be confused with the
12324 outer declaration. In particular, the inner version should
12325 have a template parameter of level 2, not level 1. This
12326 would be particularly important if the member declaration
12329 template <class V = U> friend struct S1;
12331 say, when we should tsubst into `U' when instantiating
12332 S2. On the other hand, when presented with:
12342 we must find the inner binding eventually. We
12343 accomplish this by making sure that the new type we
12344 create to represent this declaration has the right
12346 context
= TYPE_CONTEXT (t
);
12352 /* If no such tag is yet defined, create a forward-reference node
12353 and record it as the "definition".
12354 When a real declaration of this type is found,
12355 the forward-reference will be altered into a real type. */
12356 if (code
== ENUMERAL_TYPE
)
12358 error ("use of enum %q#D without previous declaration", name
);
12359 return error_mark_node
;
12363 t
= make_class_type (code
);
12364 TYPE_CONTEXT (t
) = context
;
12365 if (orig_scope
== ts_lambda
)
12366 /* Remember that we're declaring a lambda to avoid bogus errors
12367 in push_template_decl. */
12368 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12369 t
= pushtag (name
, t
, scope
);
12374 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12376 if (!redeclare_class_template (t
, current_template_parms
))
12377 return error_mark_node
;
12379 else if (!processing_template_decl
12380 && CLASS_TYPE_P (t
)
12381 && CLASSTYPE_IS_TEMPLATE (t
))
12383 error ("redeclaration of %qT as a non-template", t
);
12384 error ("previous declaration %q+D", t
);
12385 return error_mark_node
;
12388 /* Make injected friend class visible. */
12389 if (scope
!= ts_within_enclosing_non_class
12390 && hidden_name_p (TYPE_NAME (t
)))
12392 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12393 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12395 if (TYPE_TEMPLATE_INFO (t
))
12397 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12398 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12406 /* Wrapper for xref_tag_1. */
12409 xref_tag (enum tag_types tag_code
, tree name
,
12410 tag_scope scope
, bool template_header_p
)
12414 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12415 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12416 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12422 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12424 enum tag_types tag_kind
;
12426 if (TREE_CODE (old
) == RECORD_TYPE
)
12427 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12429 tag_kind
= union_type
;
12431 if (id
== NULL_TREE
)
12432 id
= TYPE_IDENTIFIER (old
);
12434 return xref_tag (tag_kind
, id
, scope
, false);
12437 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12438 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12439 access_* node, and the TREE_VALUE is the type of the base-class.
12440 Non-NULL TREE_TYPE indicates virtual inheritance.
12442 Returns true if the binfo hierarchy was successfully created,
12443 false if an error was detected. */
12446 xref_basetypes (tree ref
, tree base_list
)
12449 tree binfo
, base_binfo
;
12450 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12451 unsigned max_bases
= 0; /* Maximum direct bases. */
12453 tree default_access
;
12454 tree igo_prev
; /* Track Inheritance Graph Order. */
12456 if (ref
== error_mark_node
)
12459 /* The base of a derived class is private by default, all others are
12461 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12462 && CLASSTYPE_DECLARED_CLASS (ref
)
12463 ? access_private_node
: access_public_node
);
12465 /* First, make sure that any templates in base-classes are
12466 instantiated. This ensures that if we call ourselves recursively
12467 we do not get confused about which classes are marked and which
12469 basep
= &base_list
;
12472 tree basetype
= TREE_VALUE (*basep
);
12474 /* The dependent_type_p call below should really be dependent_scope_p
12475 so that we give a hard error about using an incomplete type as a
12476 base, but we allow it with a pedwarn for backward
12478 if (processing_template_decl
12479 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12480 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12481 if (!dependent_type_p (basetype
)
12482 && !complete_type_or_else (basetype
, NULL
))
12483 /* An incomplete type. Remove it from the list. */
12484 *basep
= TREE_CHAIN (*basep
);
12488 if (TREE_TYPE (*basep
))
12490 if (CLASS_TYPE_P (basetype
))
12491 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12492 basep
= &TREE_CHAIN (*basep
);
12496 TYPE_MARKED_P (ref
) = 1;
12498 /* The binfo slot should be empty, unless this is an (ill-formed)
12500 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12502 error ("redefinition of %q#T", ref
);
12506 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12508 binfo
= make_tree_binfo (max_bases
);
12510 TYPE_BINFO (ref
) = binfo
;
12511 BINFO_OFFSET (binfo
) = size_zero_node
;
12512 BINFO_TYPE (binfo
) = ref
;
12514 /* Apply base-class info set up to the variants of this type. */
12515 fixup_type_variants (ref
);
12519 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12520 /* An aggregate cannot have baseclasses. */
12521 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12523 if (TREE_CODE (ref
) == UNION_TYPE
)
12525 error ("derived union %qT invalid", ref
);
12532 if (TYPE_FOR_JAVA (ref
))
12534 error ("Java class %qT cannot have multiple bases", ref
);
12541 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12543 if (TYPE_FOR_JAVA (ref
))
12545 error ("Java class %qT cannot have virtual bases", ref
);
12550 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12552 tree access
= TREE_PURPOSE (base_list
);
12553 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12554 tree basetype
= TREE_VALUE (base_list
);
12556 if (access
== access_default_node
)
12557 access
= default_access
;
12559 if (PACK_EXPANSION_P (basetype
))
12560 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12561 if (TREE_CODE (basetype
) == TYPE_DECL
)
12562 basetype
= TREE_TYPE (basetype
);
12563 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12565 error ("base type %qT fails to be a struct or class type",
12570 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12571 TYPE_FOR_JAVA (ref
) = 1;
12573 base_binfo
= NULL_TREE
;
12574 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12576 base_binfo
= TYPE_BINFO (basetype
);
12577 /* The original basetype could have been a typedef'd type. */
12578 basetype
= BINFO_TYPE (base_binfo
);
12580 /* Inherit flags from the base. */
12581 TYPE_HAS_NEW_OPERATOR (ref
)
12582 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12583 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12584 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12585 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12586 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12587 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12588 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12589 CLASSTYPE_REPEATED_BASE_P (ref
)
12590 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12593 /* We must do this test after we've seen through a typedef
12595 if (TYPE_MARKED_P (basetype
))
12597 if (basetype
== ref
)
12598 error ("recursive type %qT undefined", basetype
);
12600 error ("duplicate base type %qT invalid", basetype
);
12604 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12605 /* Regenerate the pack expansion for the bases. */
12606 basetype
= make_pack_expansion (basetype
);
12608 TYPE_MARKED_P (basetype
) = 1;
12610 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12611 &igo_prev
, via_virtual
);
12612 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12613 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12615 BINFO_BASE_APPEND (binfo
, base_binfo
);
12616 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12619 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12620 /* If we didn't get max_vbases vbases, we must have shared at
12621 least one of them, and are therefore diamond shaped. */
12622 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12624 /* Unmark all the types. */
12625 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12626 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12627 TYPE_MARKED_P (ref
) = 0;
12629 /* Now see if we have a repeated base type. */
12630 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12632 for (base_binfo
= binfo
; base_binfo
;
12633 base_binfo
= TREE_CHAIN (base_binfo
))
12635 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12637 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12640 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12642 for (base_binfo
= binfo
; base_binfo
;
12643 base_binfo
= TREE_CHAIN (base_binfo
))
12644 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12645 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12654 /* Copies the enum-related properties from type SRC to type DST.
12655 Used with the underlying type of an enum and the enum itself. */
12657 copy_type_enum (tree dst
, tree src
)
12660 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12662 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12663 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12664 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12665 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12666 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12667 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12668 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12669 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12670 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12674 /* Begin compiling the definition of an enumeration type.
12677 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12679 UNDERLYING_TYPE is the type that will be used as the storage for
12680 the enumeration type. This should be NULL_TREE if no storage type
12683 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12685 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12687 Returns the type object, as yet incomplete.
12688 Also records info about it so that build_enumerator
12689 may be used to declare the individual values as they are read. */
12692 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12693 bool scoped_enum_p
, bool *is_new
)
12695 tree prevtype
= NULL_TREE
;
12696 gcc_assert (identifier_p (name
));
12700 /* [C++0x dcl.enum]p5:
12702 If not explicitly specified, the underlying type of a scoped
12703 enumeration type is int. */
12704 if (!underlying_type
&& scoped_enum_p
)
12705 underlying_type
= integer_type_node
;
12707 if (underlying_type
)
12708 underlying_type
= cv_unqualified (underlying_type
);
12710 /* If this is the real definition for a previous forward reference,
12711 fill in the contents in the same object that used to be the
12712 forward reference. */
12714 enumtype
= lookup_and_check_tag (enum_type
, name
,
12715 /*tag_scope=*/ts_current
,
12716 /*template_header_p=*/false);
12718 /* In case of a template_decl, the only check that should be deferred
12719 to instantiation time is the comparison of underlying types. */
12720 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12722 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12724 error_at (input_location
, "scoped/unscoped mismatch "
12725 "in enum %q#T", enumtype
);
12726 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12727 "previous definition here");
12728 enumtype
= error_mark_node
;
12730 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12732 error_at (input_location
, "underlying type mismatch "
12733 "in enum %q#T", enumtype
);
12734 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12735 "previous definition here");
12736 enumtype
= error_mark_node
;
12738 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12739 && !dependent_type_p (underlying_type
)
12740 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12741 && !same_type_p (underlying_type
,
12742 ENUM_UNDERLYING_TYPE (enumtype
)))
12744 error_at (input_location
, "different underlying type "
12745 "in enum %q#T", enumtype
);
12746 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12747 "previous definition here");
12748 underlying_type
= NULL_TREE
;
12752 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12753 || processing_template_decl
)
12755 /* In case of error, make a dummy enum to allow parsing to
12757 if (enumtype
== error_mark_node
)
12759 name
= make_anon_name ();
12760 enumtype
= NULL_TREE
;
12763 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12764 of an opaque enum, or an opaque enum of an already defined
12765 enumeration (C++0x only).
12766 In any other case, it'll be NULL_TREE. */
12772 prevtype
= enumtype
;
12774 /* Do not push the decl more than once, unless we need to
12775 compare underlying types at instantiation time */
12777 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12778 || (underlying_type
12779 && dependent_type_p (underlying_type
))
12780 || (ENUM_UNDERLYING_TYPE (enumtype
)
12781 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12783 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12784 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12787 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12790 if (enumtype
== error_mark_node
)
12791 return error_mark_node
;
12793 /* The enum is considered opaque until the opening '{' of the
12794 enumerator list. */
12795 SET_OPAQUE_ENUM_P (enumtype
, true);
12796 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12799 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12801 if (underlying_type
)
12803 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12805 copy_type_enum (enumtype
, underlying_type
);
12806 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12808 else if (dependent_type_p (underlying_type
))
12809 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12811 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12812 underlying_type
, enumtype
);
12815 /* If into a template class, the returned enum is always the first
12816 declaration (opaque or not) seen. This way all the references to
12817 this type will be to the same declaration. The following ones are used
12818 only to check for definition errors. */
12819 if (prevtype
&& processing_template_decl
)
12825 /* After processing and defining all the values of an enumeration type,
12826 install their decls in the enumeration type.
12827 ENUMTYPE is the type object. */
12830 finish_enum_value_list (tree enumtype
)
12833 tree underlying_type
;
12836 tree minnode
, maxnode
;
12839 bool fixed_underlying_type_p
12840 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12842 /* We built up the VALUES in reverse order. */
12843 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12845 /* For an enum defined in a template, just set the type of the values;
12846 all further processing is postponed until the template is
12847 instantiated. We need to set the type so that tsubst of a CONST_DECL
12849 if (processing_template_decl
)
12851 for (values
= TYPE_VALUES (enumtype
);
12853 values
= TREE_CHAIN (values
))
12854 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12858 /* Determine the minimum and maximum values of the enumerators. */
12859 if (TYPE_VALUES (enumtype
))
12861 minnode
= maxnode
= NULL_TREE
;
12863 for (values
= TYPE_VALUES (enumtype
);
12865 values
= TREE_CHAIN (values
))
12867 decl
= TREE_VALUE (values
);
12869 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12870 each enumerator has the type of its enumeration. Prior to the
12871 closing brace, the type of each enumerator is the type of its
12872 initializing value. */
12873 TREE_TYPE (decl
) = enumtype
;
12875 /* Update the minimum and maximum values, if appropriate. */
12876 value
= DECL_INITIAL (decl
);
12877 if (value
== error_mark_node
)
12878 value
= integer_zero_node
;
12879 /* Figure out what the minimum and maximum values of the
12880 enumerators are. */
12882 minnode
= maxnode
= value
;
12883 else if (tree_int_cst_lt (maxnode
, value
))
12885 else if (tree_int_cst_lt (value
, minnode
))
12892 If the enumerator-list is empty, the underlying type is as if
12893 the enumeration had a single enumerator with value 0. */
12894 minnode
= maxnode
= integer_zero_node
;
12896 if (!fixed_underlying_type_p
)
12898 /* Compute the number of bits require to represent all values of the
12899 enumeration. We must do this before the type of MINNODE and
12900 MAXNODE are transformed, since tree_int_cst_min_precision relies
12901 on the TREE_TYPE of the value it is passed. */
12902 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12903 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12904 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12905 int precision
= MAX (lowprec
, highprec
);
12907 bool use_short_enum
;
12909 /* Determine the underlying type of the enumeration.
12913 The underlying type of an enumeration is an integral type that
12914 can represent all the enumerator values defined in the
12915 enumeration. It is implementation-defined which integral type is
12916 used as the underlying type for an enumeration except that the
12917 underlying type shall not be larger than int unless the value of
12918 an enumerator cannot fit in an int or unsigned int.
12920 We use "int" or an "unsigned int" as the underlying type, even if
12921 a smaller integral type would work, unless the user has
12922 explicitly requested that we use the smallest possible type. The
12923 user can request that for all enumerations with a command line
12924 flag, or for just one enumeration with an attribute. */
12926 use_short_enum
= flag_short_enums
12927 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12929 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12933 underlying_type
= integer_types
[itk
];
12934 if (underlying_type
!= NULL_TREE
12935 && TYPE_PRECISION (underlying_type
) >= precision
12936 && TYPE_SIGN (underlying_type
) == sgn
)
12939 if (itk
== itk_none
)
12943 IF no integral type can represent all the enumerator values, the
12944 enumeration is ill-formed. */
12945 error ("no integral type can represent all of the enumerator values "
12946 "for %qT", enumtype
);
12947 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12948 underlying_type
= integer_types
[itk_unsigned_long_long
];
12953 The value of sizeof() applied to an enumeration type, an object
12954 of an enumeration type, or an enumerator, is the value of sizeof()
12955 applied to the underlying type. */
12956 copy_type_enum (enumtype
, underlying_type
);
12958 /* Compute the minimum and maximum values for the type.
12962 For an enumeration where emin is the smallest enumerator and emax
12963 is the largest, the values of the enumeration are the values of the
12964 underlying type in the range bmin to bmax, where bmin and bmax are,
12965 respectively, the smallest and largest values of the smallest bit-
12966 field that can store emin and emax. */
12968 /* The middle-end currently assumes that types with TYPE_PRECISION
12969 narrower than their underlying type are suitably zero or sign
12970 extended to fill their mode. Similarly, it assumes that the front
12971 end assures that a value of a particular type must be within
12972 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12974 We used to set these fields based on bmin and bmax, but that led
12975 to invalid assumptions like optimizing away bounds checking. So
12976 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12977 TYPE_MAX_VALUE to the values for the mode above and only restrict
12978 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12979 ENUM_UNDERLYING_TYPE (enumtype
)
12980 = build_distinct_type_copy (underlying_type
);
12981 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12982 set_min_and_max_values_for_integral_type
12983 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12985 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12986 if (flag_strict_enums
)
12987 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12990 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12992 /* Convert each of the enumerators to the type of the underlying
12993 type of the enumeration. */
12994 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12996 location_t saved_location
;
12998 decl
= TREE_VALUE (values
);
12999 saved_location
= input_location
;
13000 input_location
= DECL_SOURCE_LOCATION (decl
);
13001 if (fixed_underlying_type_p
)
13002 /* If the enumeration type has a fixed underlying type, we
13003 already checked all of the enumerator values. */
13004 value
= DECL_INITIAL (decl
);
13006 value
= perform_implicit_conversion (underlying_type
,
13007 DECL_INITIAL (decl
),
13008 tf_warning_or_error
);
13009 input_location
= saved_location
;
13011 /* Do not clobber shared ints. */
13012 value
= copy_node (value
);
13014 TREE_TYPE (value
) = enumtype
;
13015 DECL_INITIAL (decl
) = value
;
13018 /* Fix up all variant types of this enum type. */
13019 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13020 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13022 if (at_class_scope_p ()
13023 && COMPLETE_TYPE_P (current_class_type
)
13024 && UNSCOPED_ENUM_P (enumtype
))
13025 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13026 current_class_type
);
13028 /* Finish debugging output for this type. */
13029 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13032 /* Finishes the enum type. This is called only the first time an
13033 enumeration is seen, be it opaque or odinary.
13034 ENUMTYPE is the type object. */
13037 finish_enum (tree enumtype
)
13039 if (processing_template_decl
)
13041 if (at_function_scope_p ())
13042 add_stmt (build_min (TAG_DEFN
, enumtype
));
13046 /* If this is a forward declaration, there should not be any variants,
13047 though we can get a variant in the middle of an enum-specifier with
13048 wacky code like 'enum E { e = sizeof(const E*) };' */
13049 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13050 && (TYPE_VALUES (enumtype
)
13051 || !TYPE_NEXT_VARIANT (enumtype
)));
13054 /* Build and install a CONST_DECL for an enumeration constant of the
13055 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13056 Apply ATTRIBUTES if available. LOC is the location of NAME.
13057 Assignment of sequential values by default is handled here. */
13060 build_enumerator (tree name
, tree value
, tree enumtype
, tree attributes
,
13067 /* scalar_constant_value will pull out this expression, so make sure
13068 it's folded as appropriate. */
13069 if (processing_template_decl
)
13070 value
= fold_non_dependent_expr (value
);
13072 /* If the VALUE was erroneous, pretend it wasn't there; that will
13073 result in the enum being assigned the next value in sequence. */
13074 if (value
== error_mark_node
)
13077 /* Remove no-op casts from the value. */
13079 STRIP_TYPE_NOPS (value
);
13081 if (! processing_template_decl
)
13083 /* Validate and default VALUE. */
13084 if (value
!= NULL_TREE
)
13086 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13088 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13093 else if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
13094 (TREE_TYPE (value
)))
13095 value
= perform_implicit_conversion_flags
13096 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13097 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13099 if (value
== error_mark_node
)
13102 if (value
!= NULL_TREE
)
13104 value
= cxx_constant_value (value
);
13106 if (TREE_CODE (value
) != INTEGER_CST
13107 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13109 error ("enumerator value for %qD is not an integer constant",
13116 /* Default based on previous value. */
13117 if (value
== NULL_TREE
)
13119 if (TYPE_VALUES (enumtype
))
13124 /* C++03 7.2/4: If no initializer is specified for the first
13125 enumerator, the type is an unspecified integral
13126 type. Otherwise the type is the same as the type of the
13127 initializing value of the preceding enumerator unless the
13128 incremented value is not representable in that type, in
13129 which case the type is an unspecified integral type
13130 sufficient to contain the incremented value. */
13131 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13132 if (error_operand_p (prev_value
))
13133 value
= error_mark_node
;
13136 tree type
= TREE_TYPE (prev_value
);
13137 signop sgn
= TYPE_SIGN (type
);
13138 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13142 bool pos
= !wi::neg_p (wi
, sgn
);
13143 if (!wi::fits_to_tree_p (wi
, type
))
13146 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13148 type
= integer_types
[itk
];
13149 if (type
!= NULL_TREE
13150 && (pos
|| !TYPE_UNSIGNED (type
))
13151 && wi::fits_to_tree_p (wi
, type
))
13154 if (type
&& cxx_dialect
< cxx11
13155 && itk
> itk_unsigned_long
)
13156 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13157 incremented enumerator value is too large for %<unsigned long%>" : "\
13158 incremented enumerator value is too large for %<long%>");
13160 if (type
== NULL_TREE
)
13163 value
= wide_int_to_tree (type
, wi
);
13168 error ("overflow in enumeration values at %qD", name
);
13169 value
= error_mark_node
;
13174 value
= integer_zero_node
;
13177 /* Remove no-op casts from the value. */
13178 STRIP_TYPE_NOPS (value
);
13180 /* If the underlying type of the enum is fixed, check whether
13181 the enumerator values fits in the underlying type. If it
13182 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13183 if (ENUM_UNDERLYING_TYPE (enumtype
)
13185 && TREE_CODE (value
) == INTEGER_CST
)
13187 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13188 error ("enumerator value %E is outside the range of underlying "
13189 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13191 /* Convert the value to the appropriate type. */
13192 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13196 /* C++ associates enums with global, function, or class declarations. */
13197 context
= current_scope ();
13199 /* Build the actual enumeration constant. Note that the enumeration
13200 constants have the underlying type of the enum (if it is fixed)
13201 or the type of their initializer (if the underlying type of the
13202 enum is not fixed):
13206 If the underlying type is fixed, the type of each enumerator
13207 prior to the closing brace is the underlying type; if the
13208 initializing value of an enumerator cannot be represented by
13209 the underlying type, the program is ill-formed. If the
13210 underlying type is not fixed, the type of each enumerator is
13211 the type of its initializing value.
13213 If the underlying type is not fixed, it will be computed by
13214 finish_enum and we will reset the type of this enumerator. Of
13215 course, if we're processing a template, there may be no value. */
13216 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13218 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13220 DECL_CONTEXT (decl
) = enumtype
;
13221 TREE_CONSTANT (decl
) = 1;
13222 TREE_READONLY (decl
) = 1;
13223 DECL_INITIAL (decl
) = value
;
13226 cplus_decl_attributes (&decl
, attributes
, 0);
13228 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13229 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13230 on the TYPE_FIELDS list for `S'. (That's so that you can say
13231 things like `S::i' later.) */
13232 finish_member_declaration (decl
);
13236 /* Add this enumeration constant to the list for this type. */
13237 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13240 /* Look for an enumerator with the given NAME within the enumeration
13241 type ENUMTYPE. This routine is used primarily for qualified name
13242 lookup into an enumerator in C++0x, e.g.,
13244 enum class Color { Red, Green, Blue };
13246 Color color = Color::Red;
13248 Returns the value corresponding to the enumerator, or
13249 NULL_TREE if no such enumerator was found. */
13251 lookup_enumerator (tree enumtype
, tree name
)
13254 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13256 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13257 return e
? TREE_VALUE (e
) : NULL_TREE
;
13261 /* We're defining DECL. Make sure that its type is OK. */
13264 check_function_type (tree decl
, tree current_function_parms
)
13266 tree fntype
= TREE_TYPE (decl
);
13267 tree return_type
= complete_type (TREE_TYPE (fntype
));
13269 /* In a function definition, arg types must be complete. */
13270 require_complete_types_for_parms (current_function_parms
);
13272 if (dependent_type_p (return_type
)
13273 || type_uses_auto (return_type
))
13275 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13276 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13278 tree args
= TYPE_ARG_TYPES (fntype
);
13280 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13281 error ("return type %q#T is incomplete", return_type
);
13283 error ("return type has Java class type %q#T", return_type
);
13285 /* Make it return void instead. */
13286 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13287 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13289 TREE_CHAIN (args
));
13291 fntype
= build_function_type (void_type_node
, args
);
13293 = build_exception_variant (fntype
,
13294 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13295 fntype
= (cp_build_type_attribute_variant
13296 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13297 TREE_TYPE (decl
) = fntype
;
13300 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13303 /* Create the FUNCTION_DECL for a function definition.
13304 DECLSPECS and DECLARATOR are the parts of the declaration;
13305 they describe the function's name and the type it returns,
13306 but twisted together in a fashion that parallels the syntax of C.
13308 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13309 DECLARATOR is really the DECL for the function we are about to
13310 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13311 indicating that the function is an inline defined in-class.
13313 This function creates a binding context for the function body
13314 as well as setting up the FUNCTION_DECL in current_function_decl.
13316 For C++, we must first check whether that datum makes any sense.
13317 For example, "class A local_a(1,2);" means that variable local_a
13318 is an aggregate of type A, which should have a constructor
13319 applied to it with the argument list [1, 2].
13321 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13322 or may be a BLOCK if the function has been defined previously
13323 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13324 error_mark_node if the function has never been defined, or
13325 a BLOCK if the function has been defined somewhere. */
13328 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13330 tree ctype
= NULL_TREE
;
13333 int doing_friend
= 0;
13334 cp_binding_level
*bl
;
13335 tree current_function_parms
;
13336 struct c_fileinfo
*finfo
13337 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13338 bool honor_interface
;
13340 /* Sanity check. */
13341 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13342 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13344 fntype
= TREE_TYPE (decl1
);
13345 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13346 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13348 /* ISO C++ 11.4/5. A friend function defined in a class is in
13349 the (lexical) scope of the class in which it is defined. */
13350 if (!ctype
&& DECL_FRIEND_P (decl1
))
13352 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13354 /* CTYPE could be null here if we're dealing with a template;
13355 for example, `inline friend float foo()' inside a template
13356 will have no CTYPE set. */
13357 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13363 if (DECL_DECLARED_INLINE_P (decl1
)
13364 && lookup_attribute ("noinline", attrs
))
13365 warning (0, "inline function %q+D given attribute noinline", decl1
);
13367 /* Handle gnu_inline attribute. */
13368 if (GNU_INLINE_P (decl1
))
13370 DECL_EXTERNAL (decl1
) = 1;
13371 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13372 DECL_INTERFACE_KNOWN (decl1
) = 1;
13373 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13376 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13377 /* This is a constructor, we must ensure that any default args
13378 introduced by this definition are propagated to the clones
13379 now. The clones are used directly in overload resolution. */
13380 adjust_clone_args (decl1
);
13382 /* Sometimes we don't notice that a function is a static member, and
13383 build a METHOD_TYPE for it. Fix that up now. */
13384 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13385 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13387 /* Set up current_class_type, and enter the scope of the class, if
13390 push_nested_class (ctype
);
13391 else if (DECL_STATIC_FUNCTION_P (decl1
))
13392 push_nested_class (DECL_CONTEXT (decl1
));
13394 /* Now that we have entered the scope of the class, we must restore
13395 the bindings for any template parameters surrounding DECL1, if it
13396 is an inline member template. (Order is important; consider the
13397 case where a template parameter has the same name as a field of
13398 the class.) It is not until after this point that
13399 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13400 if (flags
& SF_INCLASS_INLINE
)
13401 maybe_begin_member_template_processing (decl1
);
13403 /* Effective C++ rule 15. */
13405 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13406 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13407 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13409 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13410 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13411 if (!DECL_INITIAL (decl1
))
13412 DECL_INITIAL (decl1
) = error_mark_node
;
13414 /* This function exists in static storage.
13415 (This does not mean `static' in the C sense!) */
13416 TREE_STATIC (decl1
) = 1;
13418 /* We must call push_template_decl after current_class_type is set
13419 up. (If we are processing inline definitions after exiting a
13420 class scope, current_class_type will be NULL_TREE until set above
13421 by push_nested_class.) */
13422 if (processing_template_decl
)
13424 tree newdecl1
= push_template_decl (decl1
);
13425 if (newdecl1
== error_mark_node
)
13427 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13428 pop_nested_class ();
13434 /* We are now in the scope of the function being defined. */
13435 current_function_decl
= decl1
;
13437 /* Save the parm names or decls from this function's declarator
13438 where store_parm_decls will find them. */
13439 current_function_parms
= DECL_ARGUMENTS (decl1
);
13441 /* Make sure the parameter and return types are reasonable. When
13442 you declare a function, these types can be incomplete, but they
13443 must be complete when you define the function. */
13444 check_function_type (decl1
, current_function_parms
);
13446 /* Build the return declaration for the function. */
13447 restype
= TREE_TYPE (fntype
);
13449 if (DECL_RESULT (decl1
) == NULL_TREE
)
13453 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13454 DECL_ARTIFICIAL (resdecl
) = 1;
13455 DECL_IGNORED_P (resdecl
) = 1;
13456 DECL_RESULT (decl1
) = resdecl
;
13458 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13461 /* Let the user know we're compiling this function. */
13462 announce_function (decl1
);
13464 /* Record the decl so that the function name is defined.
13465 If we already have a decl for this name, and it is a FUNCTION_DECL,
13466 use the old decl. */
13467 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13469 /* A specialization is not used to guide overload resolution. */
13470 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13471 && !(DECL_USE_TEMPLATE (decl1
) &&
13472 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13474 tree olddecl
= pushdecl (decl1
);
13476 if (olddecl
== error_mark_node
)
13477 /* If something went wrong when registering the declaration,
13478 use DECL1; we have to have a FUNCTION_DECL to use when
13479 parsing the body of the function. */
13483 /* Otherwise, OLDDECL is either a previous declaration
13484 of the same function or DECL1 itself. */
13486 if (warn_missing_declarations
13487 && olddecl
== decl1
13488 && !DECL_MAIN_P (decl1
)
13489 && TREE_PUBLIC (decl1
)
13490 && !DECL_DECLARED_INLINE_P (decl1
))
13494 /* Check whether DECL1 is in an anonymous
13496 for (context
= DECL_CONTEXT (decl1
);
13498 context
= DECL_CONTEXT (context
))
13500 if (TREE_CODE (context
) == NAMESPACE_DECL
13501 && DECL_NAME (context
) == NULL_TREE
)
13505 if (context
== NULL
)
13506 warning (OPT_Wmissing_declarations
,
13507 "no previous declaration for %q+D", decl1
);
13515 /* We need to set the DECL_CONTEXT. */
13516 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13517 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13519 fntype
= TREE_TYPE (decl1
);
13520 restype
= TREE_TYPE (fntype
);
13522 /* If #pragma weak applies, mark the decl appropriately now.
13523 The pragma only applies to global functions. Because
13524 determining whether or not the #pragma applies involves
13525 computing the mangled name for the declaration, we cannot
13526 apply the pragma until after we have merged this declaration
13527 with any previous declarations; if the original declaration
13528 has a linkage specification, that specification applies to
13529 the definition as well, and may affect the mangled name. */
13530 if (DECL_FILE_SCOPE_P (decl1
))
13531 maybe_apply_pragma_weak (decl1
);
13534 /* Reset this in case the call to pushdecl changed it. */
13535 current_function_decl
= decl1
;
13537 gcc_assert (DECL_INITIAL (decl1
));
13539 /* This function may already have been parsed, in which case just
13540 return; our caller will skip over the body without parsing. */
13541 if (DECL_INITIAL (decl1
) != error_mark_node
)
13544 /* Initialize RTL machinery. We cannot do this until
13545 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13546 even when processing a template; this is how we get
13547 CFUN set up, and our per-function variables initialized.
13548 FIXME factor out the non-RTL stuff. */
13549 bl
= current_binding_level
;
13550 allocate_struct_function (decl1
, processing_template_decl
);
13552 /* Initialize the language data structures. Whenever we start
13553 a new function, we destroy temporaries in the usual way. */
13554 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13555 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13556 current_binding_level
= bl
;
13558 if (!processing_template_decl
&& type_uses_auto (restype
))
13560 FNDECL_USED_AUTO (decl1
) = true;
13561 current_function_auto_return_pattern
= restype
;
13564 /* Start the statement-tree, start the tree now. */
13565 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13567 /* If we are (erroneously) defining a function that we have already
13568 defined before, wipe out what we knew before. */
13569 if (!DECL_PENDING_INLINE_P (decl1
))
13570 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13572 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13574 /* We know that this was set up by `grokclassfn'. We do not
13575 wait until `store_parm_decls', since evil parse errors may
13576 never get us to that point. Here we keep the consistency
13577 between `current_class_type' and `current_class_ptr'. */
13578 tree t
= DECL_ARGUMENTS (decl1
);
13580 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13581 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13583 cp_function_chain
->x_current_class_ref
13584 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13585 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13586 cp_function_chain
->x_current_class_ptr
= t
;
13588 /* Constructors and destructors need to know whether they're "in
13589 charge" of initializing virtual base classes. */
13590 t
= DECL_CHAIN (t
);
13591 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13593 current_in_charge_parm
= t
;
13594 t
= DECL_CHAIN (t
);
13596 if (DECL_HAS_VTT_PARM_P (decl1
))
13598 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13599 current_vtt_parm
= t
;
13603 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13604 /* Implicitly-defined methods (like the
13605 destructor for a class in which no destructor
13606 is explicitly declared) must not be defined
13607 until their definition is needed. So, we
13608 ignore interface specifications for
13609 compiler-generated functions. */
13610 && !DECL_ARTIFICIAL (decl1
));
13612 if (processing_template_decl
)
13613 /* Don't mess with interface flags. */;
13614 else if (DECL_INTERFACE_KNOWN (decl1
))
13616 tree ctx
= decl_function_context (decl1
);
13618 if (DECL_NOT_REALLY_EXTERN (decl1
))
13619 DECL_EXTERNAL (decl1
) = 0;
13621 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13622 /* This is a function in a local class in an extern inline
13623 or template function. */
13624 comdat_linkage (decl1
);
13626 /* If this function belongs to an interface, it is public.
13627 If it belongs to someone else's interface, it is also external.
13628 This only affects inlines and template instantiations. */
13629 else if (!finfo
->interface_unknown
&& honor_interface
)
13631 if (DECL_DECLARED_INLINE_P (decl1
)
13632 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13634 DECL_EXTERNAL (decl1
)
13635 = (finfo
->interface_only
13636 || (DECL_DECLARED_INLINE_P (decl1
)
13637 && ! flag_implement_inlines
13638 && !DECL_VINDEX (decl1
)));
13640 /* For WIN32 we also want to put these in linkonce sections. */
13641 maybe_make_one_only (decl1
);
13644 DECL_EXTERNAL (decl1
) = 0;
13645 DECL_INTERFACE_KNOWN (decl1
) = 1;
13646 /* If this function is in an interface implemented in this file,
13647 make sure that the back end knows to emit this function
13649 if (!DECL_EXTERNAL (decl1
))
13650 mark_needed (decl1
);
13652 else if (finfo
->interface_unknown
&& finfo
->interface_only
13653 && honor_interface
)
13655 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13656 interface, we will have both finfo->interface_unknown and
13657 finfo->interface_only set. In that case, we don't want to
13658 use the normal heuristics because someone will supply a
13659 #pragma implementation elsewhere, and deducing it here would
13660 produce a conflict. */
13661 comdat_linkage (decl1
);
13662 DECL_EXTERNAL (decl1
) = 0;
13663 DECL_INTERFACE_KNOWN (decl1
) = 1;
13664 DECL_DEFER_OUTPUT (decl1
) = 1;
13668 /* This is a definition, not a reference.
13669 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13670 if (!GNU_INLINE_P (decl1
))
13671 DECL_EXTERNAL (decl1
) = 0;
13673 if ((DECL_DECLARED_INLINE_P (decl1
)
13674 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13675 && ! DECL_INTERFACE_KNOWN (decl1
))
13676 DECL_DEFER_OUTPUT (decl1
) = 1;
13678 DECL_INTERFACE_KNOWN (decl1
) = 1;
13681 /* Determine the ELF visibility attribute for the function. We must not
13682 do this before calling "pushdecl", as we must allow "duplicate_decls"
13683 to merge any attributes appropriately. We also need to wait until
13685 if (!DECL_CLONED_FUNCTION_P (decl1
))
13686 determine_visibility (decl1
);
13688 if (!processing_template_decl
)
13689 maybe_instantiate_noexcept (decl1
);
13691 begin_scope (sk_function_parms
, decl1
);
13695 if (DECL_DESTRUCTOR_P (decl1
)
13696 || (DECL_CONSTRUCTOR_P (decl1
)
13697 && targetm
.cxx
.cdtor_returns_this ()))
13699 cdtor_label
= create_artificial_label (input_location
);
13702 start_fname_decls ();
13704 store_parm_decls (current_function_parms
);
13706 if (!processing_template_decl
13707 && flag_lifetime_dse
&& DECL_CONSTRUCTOR_P (decl1
))
13709 /* Insert a clobber to let the back end know that the object storage
13710 is dead when we enter the constructor. */
13711 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13712 tree clobber
= build_constructor (btype
, NULL
);
13713 TREE_THIS_VOLATILE (clobber
) = true;
13714 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
13715 bref
= convert_from_reference (bref
);
13716 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13717 finish_expr_stmt (exprstmt
);
13724 /* Like start_preparsed_function, except that instead of a
13725 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13727 Returns true on success. If the DECLARATOR is not suitable
13728 for a function, we return false, which tells the parser to
13729 skip the entire function. */
13732 start_function (cp_decl_specifier_seq
*declspecs
,
13733 const cp_declarator
*declarator
,
13738 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13739 invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION
, decl1
);
13740 if (decl1
== error_mark_node
)
13742 /* If the declarator is not suitable for a function definition,
13743 cause a syntax error. */
13744 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13746 error ("invalid function declaration");
13750 if (DECL_MAIN_P (decl1
))
13751 /* main must return int. grokfndecl should have corrected it
13752 (and issued a diagnostic) if the user got it wrong. */
13753 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13754 integer_type_node
));
13756 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13759 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13763 use_eh_spec_block (tree fn
)
13765 return (flag_exceptions
&& flag_enforce_eh_specs
13766 && !processing_template_decl
13767 && !type_throw_all_p (TREE_TYPE (fn
))
13768 /* We insert the EH_SPEC_BLOCK only in the original
13769 function; then, it is copied automatically to the
13771 && !DECL_CLONED_FUNCTION_P (fn
)
13772 /* Implicitly-generated constructors and destructors have
13773 exception specifications. However, those specifications
13774 are the union of the possible exceptions specified by the
13775 constructors/destructors for bases and members, so no
13776 unallowed exception will ever reach this function. By
13777 not creating the EH_SPEC_BLOCK we save a little memory,
13778 and we avoid spurious warnings about unreachable
13780 && !DECL_DEFAULTED_FN (fn
));
13783 /* Store the parameter declarations into the current function declaration.
13784 This is called after parsing the parameter declarations, before
13785 digesting the body of the function.
13787 Also install to binding contour return value identifier, if any. */
13790 store_parm_decls (tree current_function_parms
)
13792 tree fndecl
= current_function_decl
;
13795 /* This is a chain of any other decls that came in among the parm
13796 declarations. If a parm is declared with enum {foo, bar} x;
13797 then CONST_DECLs for foo and bar are put here. */
13798 tree nonparms
= NULL_TREE
;
13800 if (current_function_parms
)
13802 /* This case is when the function was defined with an ANSI prototype.
13803 The parms already have decls, so we need not do anything here
13804 except record them as in effect
13805 and complain if any redundant old-style parm decls were written. */
13807 tree specparms
= current_function_parms
;
13810 /* Must clear this because it might contain TYPE_DECLs declared
13812 current_binding_level
->names
= NULL
;
13814 /* If we're doing semantic analysis, then we'll call pushdecl
13815 for each of these. We must do them in reverse order so that
13816 they end in the correct forward order. */
13817 specparms
= nreverse (specparms
);
13819 for (parm
= specparms
; parm
; parm
= next
)
13821 next
= DECL_CHAIN (parm
);
13822 if (TREE_CODE (parm
) == PARM_DECL
)
13824 if (DECL_NAME (parm
) == NULL_TREE
13825 || !VOID_TYPE_P (parm
))
13828 error ("parameter %qD declared void", parm
);
13832 /* If we find an enum constant or a type tag,
13833 put it aside for the moment. */
13834 TREE_CHAIN (parm
) = NULL_TREE
;
13835 nonparms
= chainon (nonparms
, parm
);
13839 /* Get the decls in their original chain order and record in the
13840 function. This is all and only the PARM_DECLs that were
13841 pushed into scope by the loop above. */
13842 DECL_ARGUMENTS (fndecl
) = getdecls ();
13845 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13847 /* Now store the final chain of decls for the arguments
13848 as the decl-chain of the current lexical scope.
13849 Put the enumerators in as well, at the front so that
13850 DECL_ARGUMENTS is not modified. */
13851 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13853 if (use_eh_spec_block (current_function_decl
))
13854 current_eh_spec_block
= begin_eh_spec_block ();
13858 /* We have finished doing semantic analysis on DECL, but have not yet
13859 generated RTL for its body. Save away our current state, so that
13860 when we want to generate RTL later we know what to do. */
13863 save_function_data (tree decl
)
13865 struct language_function
*f
;
13867 /* Save the language-specific per-function data so that we can
13868 get it back when we really expand this function. */
13869 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13872 f
= ggc_alloc
<language_function
> ();
13873 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13874 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13876 /* Clear out the bits we don't need. */
13877 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13878 f
->bindings
= NULL
;
13879 f
->x_local_names
= NULL
;
13880 f
->base
.local_typedefs
= NULL
;
13884 /* Set the return value of the constructor (if present). */
13887 finish_constructor_body (void)
13892 if (targetm
.cxx
.cdtor_returns_this ()
13893 && (! TYPE_FOR_JAVA (current_class_type
)))
13895 /* Any return from a constructor will end up here. */
13896 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13898 val
= DECL_ARGUMENTS (current_function_decl
);
13899 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13900 DECL_RESULT (current_function_decl
), val
);
13901 /* Return the address of the object. */
13902 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13903 add_stmt (exprstmt
);
13907 /* Do all the processing for the beginning of a destructor; set up the
13908 vtable pointers and cleanups for bases and members. */
13911 begin_destructor_body (void)
13913 tree compound_stmt
;
13915 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13916 issued an error message. We still want to try to process the
13917 body of the function, but initialize_vtbl_ptrs will crash if
13918 TYPE_BINFO is NULL. */
13919 if (COMPLETE_TYPE_P (current_class_type
))
13921 compound_stmt
= begin_compound_stmt (0);
13922 /* Make all virtual function table pointers in non-virtual base
13923 classes point to CURRENT_CLASS_TYPE's virtual function
13925 initialize_vtbl_ptrs (current_class_ptr
);
13926 finish_compound_stmt (compound_stmt
);
13928 if (flag_lifetime_dse
)
13930 /* Insert a cleanup to let the back end know that the object is dead
13931 when we exit the destructor, either normally or via exception. */
13932 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13933 tree clobber
= build_constructor (btype
, NULL
);
13934 TREE_THIS_VOLATILE (clobber
) = true;
13935 tree bref
= build_nop (build_reference_type (btype
),
13936 current_class_ptr
);
13937 bref
= convert_from_reference (bref
);
13938 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13939 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13942 /* And insert cleanups for our bases and members so that they
13943 will be properly destroyed if we throw. */
13944 push_base_cleanups ();
13948 /* At the end of every destructor we generate code to delete the object if
13949 necessary. Do that now. */
13952 finish_destructor_body (void)
13956 /* Any return from a destructor will end up here; that way all base
13957 and member cleanups will be run when the function returns. */
13958 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13960 /* In a virtual destructor, we must call delete. */
13961 if (DECL_VIRTUAL_P (current_function_decl
))
13964 tree virtual_size
= cxx_sizeof (current_class_type
);
13968 At the point of definition of a virtual destructor (including
13969 an implicit definition), non-placement operator delete shall
13970 be looked up in the scope of the destructor's class and if
13971 found shall be accessible and unambiguous. */
13972 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13974 /*global_p=*/false,
13975 /*placement=*/NULL_TREE
,
13976 /*alloc_fn=*/NULL_TREE
,
13977 tf_warning_or_error
);
13979 if_stmt
= begin_if_stmt ();
13980 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13981 current_in_charge_parm
,
13984 finish_expr_stmt (exprstmt
);
13985 finish_then_clause (if_stmt
);
13986 finish_if_stmt (if_stmt
);
13989 if (targetm
.cxx
.cdtor_returns_this ())
13993 val
= DECL_ARGUMENTS (current_function_decl
);
13994 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13995 DECL_RESULT (current_function_decl
), val
);
13996 /* Return the address of the object. */
13997 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13998 add_stmt (exprstmt
);
14002 /* Do the necessary processing for the beginning of a function body, which
14003 in this case includes member-initializers, but not the catch clauses of
14004 a function-try-block. Currently, this means opening a binding level
14005 for the member-initializers (in a ctor), member cleanups (in a dtor),
14006 and capture proxies (in a lambda operator()). */
14009 begin_function_body (void)
14013 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14016 if (processing_template_decl
)
14017 /* Do nothing now. */;
14019 /* Always keep the BLOCK node associated with the outermost pair of
14020 curly braces of a function. These are needed for correct
14021 operation of dwarfout.c. */
14022 keep_next_level (true);
14024 stmt
= begin_compound_stmt (BCS_FN_BODY
);
14026 if (processing_template_decl
)
14027 /* Do nothing now. */;
14028 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14029 begin_destructor_body ();
14034 /* Do the processing for the end of a function body. Currently, this means
14035 closing out the cleanups for fully-constructed bases and members, and in
14036 the case of the destructor, deleting the object if desired. Again, this
14037 is only meaningful for [cd]tors, since they are the only functions where
14038 there is a significant distinction between the main body and any
14039 function catch clauses. Handling, say, main() return semantics here
14040 would be wrong, as flowing off the end of a function catch clause for
14041 main() would also need to return 0. */
14044 finish_function_body (tree compstmt
)
14046 if (compstmt
== NULL_TREE
)
14049 /* Close the block. */
14050 finish_compound_stmt (compstmt
);
14052 if (processing_template_decl
)
14053 /* Do nothing now. */;
14054 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14055 finish_constructor_body ();
14056 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14057 finish_destructor_body ();
14060 /* Given a function, returns the BLOCK corresponding to the outermost level
14061 of curly braces, skipping the artificial block created for constructor
14065 outer_curly_brace_block (tree fndecl
)
14067 tree block
= DECL_INITIAL (fndecl
);
14068 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14070 block
= BLOCK_SUBBLOCKS (block
);
14071 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14073 block
= BLOCK_SUBBLOCKS (block
);
14074 gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block
));
14078 /* If FNDECL is a class's key method, add the class to the list of
14079 keyed classes that should be emitted. */
14082 record_key_method_defined (tree fndecl
)
14084 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14085 && DECL_VIRTUAL_P (fndecl
)
14086 && !processing_template_decl
)
14088 tree fnclass
= DECL_CONTEXT (fndecl
);
14089 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14090 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14094 /* Subroutine of finish_function.
14095 Save the body of constexpr functions for possible
14096 future compile time evaluation. */
14099 maybe_save_function_definition (tree fun
)
14101 if (!processing_template_decl
14102 && DECL_DECLARED_CONSTEXPR_P (fun
)
14103 && !cp_function_chain
->invalid_constexpr
14104 && !DECL_CLONED_FUNCTION_P (fun
))
14105 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14108 /* Finish up a function declaration and compile that function
14109 all the way to assembler language output. The free the storage
14110 for the function definition.
14112 FLAGS is a bitwise or of the following values:
14114 We just finished processing the body of an in-class inline
14115 function definition. (This processing will have taken place
14116 after the class definition is complete.) */
14119 finish_function (int flags
)
14121 tree fndecl
= current_function_decl
;
14122 tree fntype
, ctype
= NULL_TREE
;
14123 int inclass_inline
= (flags
& 2) != 0;
14125 /* When we get some parse errors, we can end up without a
14126 current_function_decl, so cope. */
14127 if (fndecl
== NULL_TREE
)
14128 return error_mark_node
;
14130 if (c_dialect_objc ())
14131 objc_finish_function ();
14133 gcc_assert (!defer_mark_used_calls
);
14134 defer_mark_used_calls
= true;
14136 record_key_method_defined (fndecl
);
14138 fntype
= TREE_TYPE (fndecl
);
14140 /* TREE_READONLY (fndecl) = 1;
14141 This caused &foo to be of type ptr-to-const-function
14142 which then got a warning when stored in a ptr-to-function variable. */
14144 gcc_assert (building_stmt_list_p ());
14145 /* The current function is being defined, so its DECL_INITIAL should
14146 be set, and unless there's a multiple definition, it should be
14147 error_mark_node. */
14148 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14150 /* For a cloned function, we've already got all the code we need;
14151 there's no need to add any extra bits. */
14152 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14154 /* Make it so that `main' always returns 0 by default. */
14155 if (DECL_MAIN_P (current_function_decl
))
14156 finish_return_stmt (integer_zero_node
);
14158 if (use_eh_spec_block (current_function_decl
))
14159 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14160 (TREE_TYPE (current_function_decl
)),
14161 current_eh_spec_block
);
14164 /* If we're saving up tree structure, tie off the function now. */
14165 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14167 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14168 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14170 finish_fname_decls ();
14172 /* If this function can't throw any exceptions, remember that. */
14173 if (!processing_template_decl
14174 && !cp_function_chain
->can_throw
14175 && !flag_non_call_exceptions
14176 && !decl_replaceable_p (fndecl
))
14177 TREE_NOTHROW (fndecl
) = 1;
14179 /* This must come after expand_function_end because cleanups might
14180 have declarations (from inline functions) that need to go into
14181 this function's blocks. */
14183 /* If the current binding level isn't the outermost binding level
14184 for this function, either there is a bug, or we have experienced
14185 syntax errors and the statement tree is malformed. */
14186 if (current_binding_level
->kind
!= sk_function_parms
)
14188 /* Make sure we have already experienced errors. */
14189 gcc_assert (errorcount
);
14191 /* Throw away the broken statement tree and extra binding
14193 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14195 while (current_binding_level
->kind
!= sk_function_parms
)
14197 if (current_binding_level
->kind
== sk_class
)
14198 pop_nested_class ();
14200 poplevel (0, 0, 0);
14203 poplevel (1, 0, 1);
14205 /* Statements should always be full-expressions at the outermost set
14206 of curly braces for a function. */
14207 gcc_assert (stmts_are_full_exprs_p ());
14209 /* If there are no return statements in a function with auto return type,
14210 the return type is void. But if the declared type is something like
14211 auto*, this is an error. */
14212 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14213 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14215 if (!is_auto (current_function_auto_return_pattern
)
14216 && !current_function_returns_value
&& !current_function_returns_null
)
14218 error ("no return statements in function returning %qT",
14219 current_function_auto_return_pattern
);
14220 inform (input_location
, "only plain %<auto%> return type can be "
14221 "deduced to %<void%>");
14223 apply_deduced_return_type (fndecl
, void_type_node
);
14224 fntype
= TREE_TYPE (fndecl
);
14227 /* Save constexpr function body before it gets munged by
14228 the NRV transformation. */
14229 maybe_save_function_definition (fndecl
);
14231 /* Set up the named return value optimization, if we can. Candidate
14232 variables are selected in check_return_expr. */
14233 if (current_function_return_value
)
14235 tree r
= current_function_return_value
;
14238 if (r
!= error_mark_node
14239 /* This is only worth doing for fns that return in memory--and
14240 simpler, since we don't have to worry about promoted modes. */
14241 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14242 /* Only allow this for variables declared in the outer scope of
14243 the function so we know that their lifetime always ends with a
14244 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14245 we were to do this optimization in tree-ssa. */
14246 && (outer
= outer_curly_brace_block (fndecl
))
14247 && chain_member (r
, BLOCK_VARS (outer
)))
14248 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14250 current_function_return_value
= NULL_TREE
;
14253 /* Remember that we were in class scope. */
14254 if (current_class_name
)
14255 ctype
= current_class_type
;
14257 /* Must mark the RESULT_DECL as being in this function. */
14258 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14260 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14261 to the FUNCTION_DECL node itself. */
14262 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14264 /* Save away current state, if appropriate. */
14265 if (!processing_template_decl
)
14266 save_function_data (fndecl
);
14268 /* Complain if there's just no return statement. */
14269 if (warn_return_type
14270 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14271 && !dependent_type_p (TREE_TYPE (fntype
))
14272 && !current_function_returns_value
&& !current_function_returns_null
14273 /* Don't complain if we abort or throw. */
14274 && !current_function_returns_abnormally
14275 /* Don't complain if there's an infinite loop. */
14276 && !current_function_infinite_loop
14277 /* Don't complain if we are declared noreturn. */
14278 && !TREE_THIS_VOLATILE (fndecl
)
14279 && !DECL_NAME (DECL_RESULT (fndecl
))
14280 && !TREE_NO_WARNING (fndecl
)
14281 /* Structor return values (if any) are set by the compiler. */
14282 && !DECL_CONSTRUCTOR_P (fndecl
)
14283 && !DECL_DESTRUCTOR_P (fndecl
)
14284 && targetm
.warn_func_return (fndecl
))
14286 warning (OPT_Wreturn_type
,
14287 "no return statement in function returning non-void");
14288 TREE_NO_WARNING (fndecl
) = 1;
14291 /* Store the end of the function, so that we get good line number
14292 info for the epilogue. */
14293 cfun
->function_end_locus
= input_location
;
14295 /* Complain about parameters that are only set, but never otherwise used. */
14296 if (warn_unused_but_set_parameter
14297 && !processing_template_decl
14298 && errorcount
== unused_but_set_errorcount
14299 && !DECL_CLONED_FUNCTION_P (fndecl
))
14303 for (decl
= DECL_ARGUMENTS (fndecl
);
14305 decl
= DECL_CHAIN (decl
))
14306 if (TREE_USED (decl
)
14307 && TREE_CODE (decl
) == PARM_DECL
14308 && !DECL_READ_P (decl
)
14309 && DECL_NAME (decl
)
14310 && !DECL_ARTIFICIAL (decl
)
14311 && !TREE_NO_WARNING (decl
)
14312 && !DECL_IN_SYSTEM_HEADER (decl
)
14313 && TREE_TYPE (decl
) != error_mark_node
14314 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14315 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14316 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14317 warning (OPT_Wunused_but_set_parameter
,
14318 "parameter %q+D set but not used", decl
);
14319 unused_but_set_errorcount
= errorcount
;
14322 /* Complain about locally defined typedefs that are not used in this
14324 maybe_warn_unused_local_typedefs ();
14326 /* Possibly warn about unused parameters. */
14327 if (warn_unused_parameter
14328 && !processing_template_decl
14329 && !DECL_CLONED_FUNCTION_P (fndecl
))
14330 do_warn_unused_parameter (fndecl
);
14332 /* Genericize before inlining. */
14333 if (!processing_template_decl
)
14335 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14336 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14337 cp_genericize (fndecl
);
14338 /* Clear out the bits we don't need. */
14339 f
->x_current_class_ptr
= NULL
;
14340 f
->x_current_class_ref
= NULL
;
14341 f
->x_eh_spec_block
= NULL
;
14342 f
->x_in_charge_parm
= NULL
;
14343 f
->x_vtt_parm
= NULL
;
14344 f
->x_return_value
= NULL
;
14345 f
->bindings
= NULL
;
14346 f
->extern_decl_map
= NULL
;
14347 f
->infinite_loops
= NULL
;
14349 /* Clear out the bits we don't need. */
14350 local_names
= NULL
;
14352 /* We're leaving the context of this function, so zap cfun. It's still in
14353 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14355 current_function_decl
= NULL
;
14357 /* If this is an in-class inline definition, we may have to pop the
14358 bindings for the template parameters that we added in
14359 maybe_begin_member_template_processing when start_function was
14361 if (inclass_inline
)
14362 maybe_end_member_template_processing ();
14364 /* Leave the scope of the class. */
14366 pop_nested_class ();
14371 current_function_decl
= NULL_TREE
;
14373 defer_mark_used_calls
= false;
14374 if (deferred_mark_used_calls
)
14379 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14381 vec_free (deferred_mark_used_calls
);
14384 invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION
, fndecl
);
14388 /* Create the FUNCTION_DECL for a function definition.
14389 DECLSPECS and DECLARATOR are the parts of the declaration;
14390 they describe the return type and the name of the function,
14391 but twisted together in a fashion that parallels the syntax of C.
14393 This function creates a binding context for the function body
14394 as well as setting up the FUNCTION_DECL in current_function_decl.
14396 Returns a FUNCTION_DECL on success.
14398 If the DECLARATOR is not suitable for a function (it defines a datum
14399 instead), we return 0, which tells yyparse to report a parse error.
14401 May return void_type_node indicating that this method is actually
14402 a friend. See grokfield for more details.
14404 Came here with a `.pushlevel' .
14406 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14407 CHANGES TO CODE IN `grokfield'. */
14410 grokmethod (cp_decl_specifier_seq
*declspecs
,
14411 const cp_declarator
*declarator
, tree attrlist
)
14413 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14416 if (fndecl
== error_mark_node
)
14417 return error_mark_node
;
14419 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14421 error ("invalid member function declaration");
14422 return error_mark_node
;
14426 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14428 /* Pass friends other than inline friend functions back. */
14429 if (fndecl
== void_type_node
)
14432 if (DECL_IN_AGGR_P (fndecl
))
14434 if (DECL_CLASS_SCOPE_P (fndecl
))
14435 error ("%qD is already defined in class %qT", fndecl
,
14436 DECL_CONTEXT (fndecl
));
14437 return error_mark_node
;
14440 check_template_shadow (fndecl
);
14442 if (TREE_PUBLIC (fndecl
))
14443 DECL_COMDAT (fndecl
) = 1;
14444 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14445 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14447 /* We process method specializations in finish_struct_1. */
14448 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14450 fndecl
= push_template_decl (fndecl
);
14451 if (fndecl
== error_mark_node
)
14455 if (! DECL_FRIEND_P (fndecl
))
14457 if (DECL_CHAIN (fndecl
))
14459 fndecl
= copy_node (fndecl
);
14460 TREE_CHAIN (fndecl
) = NULL_TREE
;
14464 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14466 DECL_IN_AGGR_P (fndecl
) = 1;
14471 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14472 we can lay it out later, when and if its type becomes complete.
14474 Also handle constexpr variables where the initializer involves
14475 an unlowered PTRMEM_CST because the class isn't complete yet. */
14478 maybe_register_incomplete_var (tree var
)
14480 gcc_assert (VAR_P (var
));
14482 /* Keep track of variables with incomplete types. */
14483 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14484 && DECL_EXTERNAL (var
))
14486 tree inner_type
= TREE_TYPE (var
);
14488 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14489 inner_type
= TREE_TYPE (inner_type
);
14490 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14492 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14493 /* RTTI TD entries are created while defining the type_info. */
14494 || (TYPE_LANG_SPECIFIC (inner_type
)
14495 && TYPE_BEING_DEFINED (inner_type
)))
14497 incomplete_var iv
= {var
, inner_type
};
14498 vec_safe_push (incomplete_vars
, iv
);
14500 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14501 && decl_constant_var_p (var
)
14502 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14504 /* When the outermost open class is complete we can resolve any
14505 pointers-to-members. */
14506 tree context
= outermost_open_class ();
14507 incomplete_var iv
= {var
, context
};
14508 vec_safe_push (incomplete_vars
, iv
);
14513 /* Called when a class type (given by TYPE) is defined. If there are
14514 any existing VAR_DECLs whose type has been completed by this
14515 declaration, update them now. */
14518 complete_vars (tree type
)
14521 incomplete_var
*iv
;
14523 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14525 if (same_type_p (type
, iv
->incomplete_type
))
14527 tree var
= iv
->decl
;
14528 tree type
= TREE_TYPE (var
);
14530 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14531 == iv
->incomplete_type
)
14533 /* Complete the type of the variable. The VAR_DECL itself
14534 will be laid out in expand_expr. */
14535 complete_type (type
);
14536 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14539 if (DECL_INITIAL (var
)
14540 && decl_constant_var_p (var
))
14541 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14543 /* Remove this entry from the list. */
14544 incomplete_vars
->unordered_remove (ix
);
14550 /* Check for pending declarations which may have abstract type. */
14551 complete_type_check_abstract (type
);
14554 /* If DECL is of a type which needs a cleanup, build and return an
14555 expression to perform that cleanup here. Return NULL_TREE if no
14556 cleanup need be done. */
14559 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14565 /* Assume no cleanup is required. */
14566 cleanup
= NULL_TREE
;
14568 if (error_operand_p (decl
))
14571 /* Handle "__attribute__((cleanup))". We run the cleanup function
14572 before the destructor since the destructor is what actually
14573 terminates the lifetime of the object. */
14574 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14581 /* Get the name specified by the user for the cleanup function. */
14582 id
= TREE_VALUE (TREE_VALUE (attr
));
14583 /* Look up the name to find the cleanup function to call. It is
14584 important to use lookup_name here because that is what is
14585 used in c-common.c:handle_cleanup_attribute when performing
14586 initial checks on the attribute. Note that those checks
14587 include ensuring that the function found is not an overloaded
14588 function, or an object with an overloaded call operator,
14589 etc.; we can rely on the fact that the function found is an
14590 ordinary FUNCTION_DECL. */
14591 fn
= lookup_name (id
);
14592 arg
= build_address (decl
);
14593 if (!mark_used (decl
, complain
) && !(complain
& tf_error
))
14594 return error_mark_node
;
14595 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14596 if (cleanup
== error_mark_node
)
14597 return error_mark_node
;
14599 /* Handle ordinary C++ destructors. */
14600 type
= TREE_TYPE (decl
);
14601 if (type_build_dtor_call (type
))
14603 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14607 if (TREE_CODE (type
) == ARRAY_TYPE
)
14610 addr
= build_address (decl
);
14612 call
= build_delete (TREE_TYPE (addr
), addr
,
14613 sfk_complete_destructor
, flags
, 0, complain
);
14614 if (call
== error_mark_node
)
14615 cleanup
= error_mark_node
;
14616 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14617 /* Discard the call. */;
14619 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14624 /* build_delete sets the location of the destructor call to the
14625 current location, even though the destructor is going to be
14626 called later, at the end of the current scope. This can lead to
14627 a "jumpy" behaviour for users of debuggers when they step around
14628 the end of the block. So let's unset the location of the
14629 destructor call instead. */
14630 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14631 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14634 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
)))
14635 /* Treat objects with destructors as used; the destructor may do
14636 something substantive. */
14637 && !mark_used (decl
, complain
) && !(complain
& tf_error
))
14638 return error_mark_node
;
14644 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14645 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14646 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14649 static_fn_type (tree memfntype
)
14654 if (TYPE_PTRMEMFUNC_P (memfntype
))
14655 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14656 if (POINTER_TYPE_P (memfntype
)
14657 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14658 memfntype
= TREE_TYPE (memfntype
);
14659 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14661 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14662 args
= TYPE_ARG_TYPES (memfntype
);
14663 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14664 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14665 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14666 fntype
= (cp_build_type_attribute_variant
14667 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14668 fntype
= (build_exception_variant
14669 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14670 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14671 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14675 /* DECL was originally constructed as a non-static member function,
14676 but turned out to be static. Update it accordingly. */
14679 revert_static_member_fn (tree decl
)
14681 tree stype
= static_fn_type (decl
);
14682 cp_cv_quals quals
= type_memfn_quals (stype
);
14683 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14685 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14686 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14688 TREE_TYPE (decl
) = stype
;
14690 if (DECL_ARGUMENTS (decl
))
14691 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14692 DECL_STATIC_FUNCTION_P (decl
) = 1;
14695 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14696 one of the language-independent trees. */
14698 enum cp_tree_node_structure_enum
14699 cp_tree_node_structure (union lang_tree_node
* t
)
14701 switch (TREE_CODE (&t
->generic
))
14703 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14704 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14705 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14706 case OVERLOAD
: return TS_CP_OVERLOAD
;
14707 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14708 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14709 case BASELINK
: return TS_CP_BASELINK
;
14710 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14711 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14712 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14713 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14714 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14715 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14716 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14717 default: return TS_CP_GENERIC
;
14721 /* Build the void_list_node (void_type_node having been created). */
14723 build_void_list_node (void)
14725 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14730 cp_missing_noreturn_ok_p (tree decl
)
14732 /* A missing noreturn is ok for the `main' function. */
14733 return DECL_MAIN_P (decl
);
14736 /* Return the decl used to identify the COMDAT group into which DECL should
14740 cxx_comdat_group (tree decl
)
14742 /* Virtual tables, construction virtual tables, and virtual table
14743 tables all go in a single COMDAT group, named after the primary
14745 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14746 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14747 /* For all other DECLs, the COMDAT group is the mangled name of the
14748 declaration itself. */
14751 while (DECL_THUNK_P (decl
))
14753 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14754 into the same section as the target function. In that case
14755 we must return target's name. */
14756 tree target
= THUNK_TARGET (decl
);
14757 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14758 && DECL_SECTION_NAME (target
) != NULL
14759 && DECL_ONE_ONLY (target
))
14769 /* Returns the return type for FN as written by the user, which may include
14770 a placeholder for a deduced return type. */
14773 fndecl_declared_return_type (tree fn
)
14775 fn
= STRIP_TEMPLATE (fn
);
14776 if (FNDECL_USED_AUTO (fn
))
14778 struct language_function
*f
= NULL
;
14779 if (DECL_STRUCT_FUNCTION (fn
))
14780 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14782 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14783 return f
->x_auto_return_pattern
;
14785 return TREE_TYPE (TREE_TYPE (fn
));
14788 /* Returns true iff DECL was declared with an auto return type and it has
14789 not yet been deduced to a real type. */
14792 undeduced_auto_decl (tree decl
)
14794 if (cxx_dialect
< cxx14
)
14796 return type_uses_auto (TREE_TYPE (decl
));
14799 /* Complain if DECL has an undeduced return type. */
14802 require_deduced_type (tree decl
)
14804 if (undeduced_auto_decl (decl
))
14805 error ("use of %qD before deduction of %<auto%>", decl
);
14808 #include "gt-cp-decl.h"