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 && CP_DECL_THREAD_LOCAL_P (newdecl
))
2528 CP_DECL_THREAD_LOCAL_P (olddecl
) = true;
2529 if (!processing_template_decl
)
2530 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2534 DECL_UID (olddecl
) = olddecl_uid
;
2536 DECL_FRIEND_P (olddecl
) = 1;
2539 DECL_ANTICIPATED (olddecl
) = 1;
2540 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2543 /* NEWDECL contains the merged attribute lists.
2544 Update OLDDECL to be the same. */
2545 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2547 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2548 so that encode_section_info has a chance to look at the new decl
2549 flags and attributes. */
2550 if (DECL_RTL_SET_P (olddecl
)
2551 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2553 && TREE_STATIC (olddecl
))))
2554 make_decl_rtl (olddecl
);
2556 /* The NEWDECL will no longer be needed. Because every out-of-class
2557 declaration of a member results in a call to duplicate_decls,
2558 freeing these nodes represents in a significant savings.
2560 Before releasing the node, be sore to remove function from symbol
2561 table that might have been inserted there to record comdat group.
2562 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2563 structure is shared in between newdecl and oldecl. */
2564 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2565 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2566 if (VAR_OR_FUNCTION_DECL_P (newdecl
))
2568 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2577 /* Return zero if the declaration NEWDECL is valid
2578 when the declaration OLDDECL (assumed to be for the same name)
2579 has already been seen.
2580 Otherwise return an error message format string with a %s
2581 where the identifier should go. */
2584 redeclaration_error_message (tree newdecl
, tree olddecl
)
2586 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2588 /* Because C++ can put things into name space for free,
2589 constructs like "typedef struct foo { ... } foo"
2590 would look like an erroneous redeclaration. */
2591 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2594 return G_("redefinition of %q#D");
2596 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2598 /* If this is a pure function, its olddecl will actually be
2599 the original initialization to `0' (which we force to call
2600 abort()). Don't complain about redefinition in this case. */
2601 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2602 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2605 /* If both functions come from different namespaces, this is not
2606 a redeclaration - this is a conflict with a used function. */
2607 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2608 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2609 && ! decls_match (olddecl
, newdecl
))
2610 return G_("%qD conflicts with used function");
2612 /* We'll complain about linkage mismatches in
2613 warn_extern_redeclared_static. */
2615 /* Defining the same name twice is no good. */
2616 if (DECL_INITIAL (olddecl
) != NULL_TREE
2617 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2619 if (DECL_NAME (olddecl
) == NULL_TREE
)
2620 return G_("%q#D not declared in class");
2621 else if (!GNU_INLINE_P (olddecl
)
2622 || GNU_INLINE_P (newdecl
))
2623 return G_("redefinition of %q#D");
2626 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2628 bool olda
= GNU_INLINE_P (olddecl
);
2629 bool newa
= GNU_INLINE_P (newdecl
);
2634 return G_("%q+D redeclared inline with "
2635 "%<gnu_inline%> attribute");
2637 return G_("%q+D redeclared inline without "
2638 "%<gnu_inline%> attribute");
2642 check_abi_tag_redeclaration
2643 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2644 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2648 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2652 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2654 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2655 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2656 return G_("redefinition of %q#D");
2660 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2661 || (DECL_TEMPLATE_RESULT (newdecl
)
2662 == DECL_TEMPLATE_RESULT (olddecl
)))
2665 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2666 if (DECL_TEMPLATE_INFO (nt
))
2667 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2668 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2669 if (DECL_TEMPLATE_INFO (ot
))
2670 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2671 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2672 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2673 return G_("redefinition of %q#D");
2675 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2677 bool olda
= GNU_INLINE_P (ot
);
2678 bool newa
= GNU_INLINE_P (nt
);
2683 return G_("%q+D redeclared inline with "
2684 "%<gnu_inline%> attribute");
2686 return G_("%q+D redeclared inline without "
2687 "%<gnu_inline%> attribute");
2691 /* Core issue #226 (C++0x):
2693 If a friend function template declaration specifies a
2694 default template-argument, that declaration shall be a
2695 definition and shall be the only declaration of the
2696 function template in the translation unit. */
2697 if ((cxx_dialect
!= cxx98
)
2698 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2699 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2700 /*is_primary=*/true,
2701 /*is_partial=*/false,
2702 /*is_friend_decl=*/2))
2703 return G_("redeclaration of friend %q#D "
2704 "may not have default template arguments");
2708 else if (VAR_P (newdecl
)
2709 && CP_DECL_THREAD_LOCAL_P (newdecl
) != CP_DECL_THREAD_LOCAL_P (olddecl
)
2710 && (! DECL_LANG_SPECIFIC (olddecl
)
2711 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2712 || CP_DECL_THREAD_LOCAL_P (newdecl
)))
2714 /* Only variables can be thread-local, and all declarations must
2715 agree on this property. */
2716 if (CP_DECL_THREAD_LOCAL_P (newdecl
))
2717 return G_("thread-local declaration of %q#D follows "
2718 "non-thread-local declaration");
2720 return G_("non-thread-local declaration of %q#D follows "
2721 "thread-local declaration");
2723 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2725 /* The objects have been declared at namespace scope. If either
2726 is a member of an anonymous union, then this is an invalid
2727 redeclaration. For example:
2733 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2734 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2735 return G_("redeclaration of %q#D");
2736 /* If at least one declaration is a reference, there is no
2737 conflict. For example:
2743 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2745 /* Reject two definitions. */
2746 return G_("redefinition of %q#D");
2750 /* Objects declared with block scope: */
2751 /* Reject two definitions, and reject a definition
2752 together with an external reference. */
2753 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2754 return G_("redeclaration of %q#D");
2759 /* Hash and equality functions for the named_label table. */
2762 named_label_hasher::hash (named_label_entry
*ent
)
2764 return DECL_UID (ent
->label_decl
);
2768 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2770 return a
->label_decl
== b
->label_decl
;
2773 /* Create a new label, named ID. */
2776 make_label_decl (tree id
, int local_p
)
2778 struct named_label_entry
*ent
;
2781 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2783 DECL_CONTEXT (decl
) = current_function_decl
;
2784 DECL_MODE (decl
) = VOIDmode
;
2785 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2787 /* Say where one reference is to the label, for the sake of the
2788 error if it is not defined. */
2789 DECL_SOURCE_LOCATION (decl
) = input_location
;
2791 /* Record the fact that this identifier is bound to this label. */
2792 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2794 /* Create the label htab for the function on demand. */
2796 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2798 /* Record this label on the list of labels used in this function.
2799 We do this before calling make_label_decl so that we get the
2800 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2801 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2802 ent
->label_decl
= decl
;
2804 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2805 gcc_assert (*slot
== NULL
);
2811 /* Look for a label named ID in the current function. If one cannot
2812 be found, create one. (We keep track of used, but undefined,
2813 labels, and complain about them at the end of a function.) */
2816 lookup_label_1 (tree id
)
2820 /* You can't use labels at global scope. */
2821 if (current_function_decl
== NULL_TREE
)
2823 error ("label %qE referenced outside of any function", id
);
2827 /* See if we've already got this label. */
2828 decl
= IDENTIFIER_LABEL_VALUE (id
);
2829 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2832 decl
= make_label_decl (id
, /*local_p=*/0);
2836 /* Wrapper for lookup_label_1. */
2839 lookup_label (tree id
)
2842 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2843 ret
= lookup_label_1 (id
);
2844 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2848 /* Declare a local label named ID. */
2851 declare_local_label (tree id
)
2854 cp_label_binding bind
;
2856 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2857 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2858 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2860 decl
= make_label_decl (id
, /*local_p=*/1);
2862 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2867 /* Returns nonzero if it is ill-formed to jump past the declaration of
2868 DECL. Returns 2 if it's also a real problem. */
2871 decl_jump_unsafe (tree decl
)
2873 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2874 with automatic storage duration is not in scope to a point where it is
2875 in scope is ill-formed unless the variable has scalar type, class type
2876 with a trivial default constructor and a trivial destructor, a
2877 cv-qualified version of one of these types, or an array of one of the
2878 preceding types and is declared without an initializer (8.5). */
2879 tree type
= TREE_TYPE (decl
);
2881 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2882 || type
== error_mark_node
)
2885 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2886 || variably_modified_type_p (type
, NULL_TREE
))
2889 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2895 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2898 identify_goto (tree decl
, const location_t
*locus
)
2900 bool complained
= (decl
2901 ? permerror (input_location
, "jump to label %qD", decl
)
2902 : permerror (input_location
, "jump to case label"));
2903 if (complained
&& locus
)
2904 inform (*locus
, " from here");
2908 /* Check that a single previously seen jump to a newly defined label
2909 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2910 the jump context; NAMES are the names in scope in LEVEL at the jump
2911 context; LOCUS is the source position of the jump or 0. Returns
2912 true if all is well. */
2915 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2916 bool exited_omp
, const location_t
*locus
)
2918 cp_binding_level
*b
;
2919 bool identified
= false, complained
= false;
2920 bool saw_eh
= false, saw_omp
= false;
2924 complained
= identify_goto (decl
, locus
);
2926 inform (input_location
, " exits OpenMP structured block");
2927 identified
= saw_omp
= true;
2930 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2932 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2934 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2935 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2936 : TREE_CHAIN (new_decls
)))
2938 int problem
= decl_jump_unsafe (new_decls
);
2944 complained
= identify_goto (decl
, locus
);
2950 inform (input_location
,
2951 " crosses initialization of %q+#D", new_decls
);
2953 inform (input_location
, " enters scope of %q+#D which has "
2954 "non-trivial destructor", new_decls
);
2960 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2964 complained
= identify_goto (decl
, locus
);
2969 if (b
->kind
== sk_try
)
2970 inform (input_location
, " enters try block");
2972 inform (input_location
, " enters catch block");
2976 if (b
->kind
== sk_omp
&& !saw_omp
)
2980 complained
= identify_goto (decl
, locus
);
2984 inform (input_location
, " enters OpenMP structured block");
2993 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2995 check_previous_goto_1 (decl
, use
->binding_level
,
2996 use
->names_in_scope
, use
->in_omp_scope
,
2997 &use
->o_goto_locus
);
3001 check_switch_goto (cp_binding_level
* level
)
3003 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
3006 /* Check that a new jump to a label DECL is OK. Called by
3007 finish_goto_stmt. */
3010 check_goto (tree decl
)
3012 struct named_label_entry
*ent
, dummy
;
3013 bool saw_catch
= false, identified
= false, complained
= false;
3017 /* We can't know where a computed goto is jumping.
3018 So we assume that it's OK. */
3019 if (TREE_CODE (decl
) != LABEL_DECL
)
3022 /* We didn't record any information about this label when we created it,
3023 and there's not much point since it's trivial to analyze as a return. */
3024 if (decl
== cdtor_label
)
3027 dummy
.label_decl
= decl
;
3028 ent
= named_labels
->find (&dummy
);
3029 gcc_assert (ent
!= NULL
);
3031 /* If the label hasn't been defined yet, defer checking. */
3032 if (! DECL_INITIAL (decl
))
3034 struct named_label_use_entry
*new_use
;
3036 /* Don't bother creating another use if the last goto had the
3037 same data, and will therefore create the same set of errors. */
3039 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3042 new_use
= ggc_alloc
<named_label_use_entry
> ();
3043 new_use
->binding_level
= current_binding_level
;
3044 new_use
->names_in_scope
= current_binding_level
->names
;
3045 new_use
->o_goto_locus
= input_location
;
3046 new_use
->in_omp_scope
= false;
3048 new_use
->next
= ent
->uses
;
3049 ent
->uses
= new_use
;
3053 if (ent
->in_try_scope
|| ent
->in_catch_scope
3054 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3056 complained
= permerror (input_location
, "jump to label %q+D", decl
);
3058 inform (input_location
, " from here");
3062 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3064 int u
= decl_jump_unsafe (bad
);
3066 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3068 /* Can't skip init of __exception_info. */
3070 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3073 else if (complained
)
3076 inform (input_location
, " skips initialization of %q+#D", bad
);
3078 inform (input_location
, " enters scope of %q+#D which has "
3079 "non-trivial destructor", bad
);
3085 if (ent
->in_try_scope
)
3086 inform (input_location
, " enters try block");
3087 else if (ent
->in_catch_scope
&& !saw_catch
)
3088 inform (input_location
, " enters catch block");
3091 if (ent
->in_omp_scope
)
3094 inform (input_location
, " enters OpenMP structured block");
3096 else if (flag_openmp
)
3098 cp_binding_level
*b
;
3099 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3101 if (b
== ent
->binding_level
)
3103 if (b
->kind
== sk_omp
)
3107 complained
= permerror (input_location
,
3108 "jump to label %q+D", decl
);
3110 inform (input_location
, " from here");
3114 inform (input_location
, " exits OpenMP structured block");
3121 /* Check that a return is ok wrt OpenMP structured blocks.
3122 Called by finish_return_stmt. Returns true if all is well. */
3125 check_omp_return (void)
3127 cp_binding_level
*b
;
3128 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3129 if (b
->kind
== sk_omp
)
3131 error ("invalid exit from OpenMP structured block");
3134 else if (b
->kind
== sk_function_parms
)
3139 /* Define a label, specifying the location in the source file.
3140 Return the LABEL_DECL node for the label. */
3143 define_label_1 (location_t location
, tree name
)
3145 struct named_label_entry
*ent
, dummy
;
3146 cp_binding_level
*p
;
3149 decl
= lookup_label (name
);
3151 dummy
.label_decl
= decl
;
3152 ent
= named_labels
->find (&dummy
);
3153 gcc_assert (ent
!= NULL
);
3155 /* After labels, make any new cleanups in the function go into their
3156 own new (temporary) binding contour. */
3157 for (p
= current_binding_level
;
3158 p
->kind
!= sk_function_parms
;
3160 p
->more_cleanups_ok
= 0;
3162 if (name
== get_identifier ("wchar_t"))
3163 permerror (input_location
, "label named wchar_t");
3165 if (DECL_INITIAL (decl
) != NULL_TREE
)
3167 error ("duplicate label %qD", decl
);
3168 return error_mark_node
;
3172 struct named_label_use_entry
*use
;
3174 /* Mark label as having been defined. */
3175 DECL_INITIAL (decl
) = error_mark_node
;
3176 /* Say where in the source. */
3177 DECL_SOURCE_LOCATION (decl
) = location
;
3179 ent
->binding_level
= current_binding_level
;
3180 ent
->names_in_scope
= current_binding_level
->names
;
3182 for (use
= ent
->uses
; use
; use
= use
->next
)
3183 check_previous_goto (decl
, use
);
3190 /* Wrapper for define_label_1. */
3193 define_label (location_t location
, tree name
)
3196 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3197 ret
= define_label_1 (location
, name
);
3198 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3205 cp_binding_level
*level
;
3206 struct cp_switch
*next
;
3207 /* The SWITCH_STMT being built. */
3209 /* A splay-tree mapping the low element of a case range to the high
3210 element, or NULL_TREE if there is no high element. Used to
3211 determine whether or not a new case label duplicates an old case
3212 label. We need a tree, rather than simply a hash table, because
3213 of the GNU case range extension. */
3215 /* Remember whether there was a case value that is outside the
3216 range of the original type of the controlling expression. */
3217 bool outside_range_p
;
3220 /* A stack of the currently active switch statements. The innermost
3221 switch statement is on the top of the stack. There is no need to
3222 mark the stack for garbage collection because it is only active
3223 during the processing of the body of a function, and we never
3224 collect at that point. */
3226 static struct cp_switch
*switch_stack
;
3228 /* Called right after a switch-statement condition is parsed.
3229 SWITCH_STMT is the switch statement being parsed. */
3232 push_switch (tree switch_stmt
)
3234 struct cp_switch
*p
= XNEW (struct cp_switch
);
3235 p
->level
= current_binding_level
;
3236 p
->next
= switch_stack
;
3237 p
->switch_stmt
= switch_stmt
;
3238 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3239 p
->outside_range_p
= false;
3246 struct cp_switch
*cs
= switch_stack
;
3247 location_t switch_location
;
3249 /* Emit warnings as needed. */
3250 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3251 const bool bool_cond_p
3252 = (SWITCH_STMT_TYPE (cs
->switch_stmt
)
3253 && TREE_CODE (SWITCH_STMT_TYPE (cs
->switch_stmt
)) == BOOLEAN_TYPE
);
3254 if (!processing_template_decl
)
3255 c_do_switch_warnings (cs
->cases
, switch_location
,
3256 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3257 SWITCH_STMT_COND (cs
->switch_stmt
),
3258 bool_cond_p
, cs
->outside_range_p
);
3260 splay_tree_delete (cs
->cases
);
3261 switch_stack
= switch_stack
->next
;
3265 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3266 condition. Note that if TYPE and VALUE are already integral we don't
3267 really do the conversion because the language-independent
3268 warning/optimization code will work better that way. */
3271 case_conversion (tree type
, tree value
)
3273 if (value
== NULL_TREE
)
3276 if (cxx_dialect
>= cxx11
3277 && (SCOPED_ENUM_P (type
)
3278 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3280 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3281 type
= type_promotes_to (type
);
3282 value
= (perform_implicit_conversion_flags
3283 (type
, value
, tf_warning_or_error
,
3284 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3286 return cxx_constant_value (value
);
3289 /* Note that we've seen a definition of a case label, and complain if this
3290 is a bad place for one. */
3293 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3296 cp_binding_level
*p
;
3299 if (processing_template_decl
)
3303 /* For templates, just add the case label; we'll do semantic
3304 analysis at instantiation-time. */
3305 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3306 return add_stmt (build_case_label (low_value
, high_value
, label
));
3309 /* Find the condition on which this switch statement depends. */
3310 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3311 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3312 cond
= TREE_VALUE (cond
);
3314 if (!check_switch_goto (switch_stack
->level
))
3315 return error_mark_node
;
3317 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3319 low_value
= case_conversion (type
, low_value
);
3320 high_value
= case_conversion (type
, high_value
);
3322 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3323 low_value
, high_value
,
3324 &switch_stack
->outside_range_p
);
3326 /* After labels, make any new cleanups in the function go into their
3327 own new (temporary) binding contour. */
3328 for (p
= current_binding_level
;
3329 p
->kind
!= sk_function_parms
;
3331 p
->more_cleanups_ok
= 0;
3336 struct typename_info
{
3344 struct typename_hasher
: ggc_ptr_hash
<tree_node
>
3346 typedef typename_info
*compare_type
;
3348 /* Hash a TYPENAME_TYPE. */
3355 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3356 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3361 /* Compare two TYPENAME_TYPEs. */
3364 equal (tree t1
, const typename_info
*t2
)
3366 return (TYPE_IDENTIFIER (t1
) == t2
->name
3367 && TYPE_CONTEXT (t1
) == t2
->scope
3368 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3369 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3370 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3374 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3375 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3377 Returns the new TYPENAME_TYPE. */
3379 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3382 build_typename_type (tree context
, tree name
, tree fullname
,
3383 enum tag_types tag_type
)
3391 if (typename_htab
== NULL
)
3392 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3394 ti
.scope
= FROB_CONTEXT (context
);
3396 ti
.template_id
= fullname
;
3397 ti
.enum_p
= tag_type
== enum_type
;
3398 ti
.class_p
= (tag_type
== class_type
3399 || tag_type
== record_type
3400 || tag_type
== union_type
);
3401 hash
= (htab_hash_pointer (ti
.scope
)
3402 ^ htab_hash_pointer (ti
.name
));
3404 /* See if we already have this type. */
3405 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3410 /* Build the TYPENAME_TYPE. */
3411 t
= cxx_make_type (TYPENAME_TYPE
);
3412 TYPE_CONTEXT (t
) = ti
.scope
;
3413 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3414 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3415 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3417 /* Build the corresponding TYPE_DECL. */
3418 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3419 TYPE_NAME (TREE_TYPE (d
)) = d
;
3420 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3421 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3422 DECL_ARTIFICIAL (d
) = 1;
3424 /* Store it in the hash table. */
3427 /* TYPENAME_TYPEs must always be compared structurally, because
3428 they may or may not resolve down to another type depending on
3429 the currently open classes. */
3430 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3436 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3437 provided to name the type. Returns an appropriate type, unless an
3438 error occurs, in which case error_mark_node is returned. If we
3439 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3440 return that, rather than the _TYPE it corresponds to, in other
3441 cases we look through the type decl. If TF_ERROR is set, complain
3442 about errors, otherwise be quiet. */
3445 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3446 tsubst_flags_t complain
)
3452 if (name
== error_mark_node
3453 || context
== NULL_TREE
3454 || context
== error_mark_node
)
3455 return error_mark_node
;
3459 if (!(TYPE_LANG_SPECIFIC (name
)
3460 && (CLASSTYPE_IS_TEMPLATE (name
)
3461 || CLASSTYPE_USE_TEMPLATE (name
))))
3462 name
= TYPE_IDENTIFIER (name
);
3464 /* Create a TEMPLATE_ID_EXPR for the type. */
3465 name
= build_nt (TEMPLATE_ID_EXPR
,
3466 CLASSTYPE_TI_TEMPLATE (name
),
3467 CLASSTYPE_TI_ARGS (name
));
3469 else if (TREE_CODE (name
) == TYPE_DECL
)
3470 name
= DECL_NAME (name
);
3474 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3476 name
= TREE_OPERAND (name
, 0);
3477 if (DECL_TYPE_TEMPLATE_P (name
))
3478 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3479 if (TREE_CODE (name
) != IDENTIFIER_NODE
)
3481 if (complain
& tf_error
)
3482 error ("%qD is not a type", name
);
3483 return error_mark_node
;
3486 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3488 if (complain
& tf_error
)
3489 error ("%qD used without template parameters", name
);
3490 return error_mark_node
;
3492 gcc_assert (identifier_p (name
));
3493 gcc_assert (TYPE_P (context
));
3495 if (!MAYBE_CLASS_TYPE_P (context
))
3497 if (complain
& tf_error
)
3498 error ("%q#T is not a class", context
);
3499 return error_mark_node
;
3502 /* When the CONTEXT is a dependent type, NAME could refer to a
3503 dependent base class of CONTEXT. But look inside it anyway
3504 if CONTEXT is a currently open scope, in case it refers to a
3505 member of the current instantiation or a non-dependent base;
3506 lookup will stop when we hit a dependent base. */
3507 if (!dependent_scope_p (context
))
3508 /* We should only set WANT_TYPE when we're a nested typename type.
3509 Then we can give better diagnostics if we find a non-type. */
3510 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3514 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3515 return build_typename_type (context
, name
, fullname
, tag_type
);
3517 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3521 if (complain
& tf_error
)
3522 error (want_template
? G_("no class template named %q#T in %q#T")
3523 : G_("no type named %q#T in %q#T"), name
, context
);
3524 return error_mark_node
;
3527 /* Pull out the template from an injected-class-name (or multiple). */
3529 t
= maybe_get_template_decl_from_type_decl (t
);
3531 if (TREE_CODE (t
) == TREE_LIST
)
3533 if (complain
& tf_error
)
3535 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3536 print_candidates (t
);
3538 return error_mark_node
;
3541 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3543 if (complain
& tf_error
)
3544 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3546 return error_mark_node
;
3548 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3550 if (complain
& tf_error
)
3551 error ("%<typename %T::%D%> names %q#T, which is not a type",
3553 return error_mark_node
;
3556 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3557 return error_mark_node
;
3559 /* If we are currently parsing a template and if T is a typedef accessed
3560 through CONTEXT then we need to remember and check access of T at
3561 template instantiation time. */
3562 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3565 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3567 /*entering_scope=*/0,
3568 complain
| tf_user
);
3570 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3573 maybe_record_typedef_use (t
);
3578 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3579 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3580 in which case error_mark_node is returned.
3582 If PARM_LIST is non-NULL, also make sure that the template parameter
3583 list of TEMPLATE_DECL matches.
3585 If COMPLAIN zero, don't complain about any errors that occur. */
3588 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3589 tsubst_flags_t complain
)
3595 name
= TYPE_IDENTIFIER (name
);
3596 else if (DECL_P (name
))
3597 name
= DECL_NAME (name
);
3598 gcc_assert (identifier_p (name
));
3600 if (!dependent_type_p (context
)
3601 || currently_open_class (context
))
3603 tree tmpl
= NULL_TREE
;
3605 if (MAYBE_CLASS_TYPE_P (context
))
3606 tmpl
= lookup_field (context
, name
, 0, false);
3608 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3609 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3611 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3613 if (complain
& tf_error
)
3614 error ("no class template named %q#T in %q#T", name
, context
);
3615 return error_mark_node
;
3619 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3621 if (complain
& tf_error
)
3623 error ("template parameters do not match template %qD", tmpl
);
3624 inform (DECL_SOURCE_LOCATION (tmpl
),
3625 "%qD declared here", tmpl
);
3627 return error_mark_node
;
3630 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3632 return error_mark_node
;
3637 /* Build the UNBOUND_CLASS_TEMPLATE. */
3638 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3639 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3640 TREE_TYPE (t
) = NULL_TREE
;
3641 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3643 /* Build the corresponding TEMPLATE_DECL. */
3644 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3645 TYPE_NAME (TREE_TYPE (d
)) = d
;
3646 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3647 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3648 DECL_ARTIFICIAL (d
) = 1;
3649 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3656 /* Push the declarations of builtin types into the namespace.
3657 RID_INDEX is the index of the builtin type in the array
3658 RID_POINTERS. NAME is the name used when looking up the builtin
3659 type. TYPE is the _TYPE node for the builtin type. */
3662 record_builtin_type (enum rid rid_index
,
3666 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3667 tree tdecl
= NULL_TREE
;
3669 if ((int) rid_index
< (int) RID_MAX
)
3670 rname
= ridpointers
[(int) rid_index
];
3672 tname
= get_identifier (name
);
3674 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3675 eliminated. Built-in types should not be looked up name; their
3676 names are keywords that the parser can recognize. However, there
3677 is code in c-common.c that uses identifier_global_value to look
3678 up built-in types by name. */
3681 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3682 DECL_ARTIFICIAL (tdecl
) = 1;
3683 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3689 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3690 DECL_ARTIFICIAL (tdecl
) = 1;
3692 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3695 if (!TYPE_NAME (type
))
3696 TYPE_NAME (type
) = tdecl
;
3699 debug_hooks
->type_decl (tdecl
, 0);
3702 /* Record one of the standard Java types.
3703 * Declare it as having the given NAME.
3704 * If SIZE > 0, it is the size of one of the integral types;
3705 * otherwise it is the negative of the size of one of the other types. */
3708 record_builtin_java_type (const char* name
, int size
)
3713 type
= build_nonstandard_integer_type (size
, 0);
3714 type
= build_distinct_type_copy (type
);
3716 else if (size
> -32)
3719 /* "__java_char" or ""__java_boolean". */
3720 type
= build_nonstandard_integer_type (-size
, 1);
3721 type
= build_distinct_type_copy (type
);
3722 /* Get the signed type cached and attached to the unsigned type,
3723 so it doesn't get garbage-collected at "random" times,
3724 causing potential codegen differences out of different UIDs
3725 and different alias set numbers. */
3726 stype
= build_nonstandard_integer_type (-size
, 0);
3727 stype
= build_distinct_type_copy (stype
);
3728 TREE_CHAIN (type
) = stype
;
3729 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3732 { /* "__java_float" or ""__java_double". */
3733 type
= make_node (REAL_TYPE
);
3734 TYPE_PRECISION (type
) = - size
;
3737 record_builtin_type (RID_MAX
, name
, type
);
3738 decl
= TYPE_NAME (type
);
3740 /* Suppress generate debug symbol entries for these types,
3741 since for normal C++ they are just clutter.
3742 However, push_lang_context undoes this if extern "Java" is seen. */
3743 DECL_IGNORED_P (decl
) = 1;
3745 TYPE_FOR_JAVA (type
) = 1;
3749 /* Push a type into the namespace so that the back ends ignore it. */
3752 record_unknown_type (tree type
, const char* name
)
3754 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3755 TYPE_DECL
, get_identifier (name
), type
));
3756 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3757 DECL_IGNORED_P (decl
) = 1;
3758 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3759 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3760 TYPE_ALIGN (type
) = 1;
3761 TYPE_USER_ALIGN (type
) = 0;
3762 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3765 /* A string for which we should create an IDENTIFIER_NODE at
3768 typedef struct predefined_identifier
3770 /* The name of the identifier. */
3771 const char *const name
;
3772 /* The place where the IDENTIFIER_NODE should be stored. */
3774 /* Nonzero if this is the name of a constructor or destructor. */
3775 const int ctor_or_dtor_p
;
3776 } predefined_identifier
;
3778 /* Create all the predefined identifiers. */
3781 initialize_predefined_identifiers (void)
3783 const predefined_identifier
*pid
;
3785 /* A table of identifiers to create at startup. */
3786 static const predefined_identifier predefined_identifiers
[] = {
3787 { "C++", &lang_name_cplusplus
, 0 },
3788 { "C", &lang_name_c
, 0 },
3789 { "Java", &lang_name_java
, 0 },
3790 /* Some of these names have a trailing space so that it is
3791 impossible for them to conflict with names written by users. */
3792 { "__ct ", &ctor_identifier
, 1 },
3793 { "__base_ctor ", &base_ctor_identifier
, 1 },
3794 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3795 { "__dt ", &dtor_identifier
, 1 },
3796 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3797 { "__base_dtor ", &base_dtor_identifier
, 1 },
3798 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3799 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3800 { "nelts", &nelts_identifier
, 0 },
3801 { THIS_NAME
, &this_identifier
, 0 },
3802 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3803 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3804 { "_vptr", &vptr_identifier
, 0 },
3805 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3806 { "::", &global_scope_name
, 0 },
3807 { "std", &std_identifier
, 0 },
3811 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3813 *pid
->node
= get_identifier (pid
->name
);
3814 if (pid
->ctor_or_dtor_p
)
3815 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3819 /* Create the predefined scalar types of C,
3820 and some nodes representing standard constants (0, 1, (void *)0).
3821 Initialize the global binding level.
3822 Make definitions for built-in primitive functions. */
3825 cxx_init_decl_processing (void)
3828 tree void_ftype_ptr
;
3830 /* Create all the identifiers we need. */
3831 initialize_predefined_identifiers ();
3833 /* Create the global variables. */
3834 push_to_top_level ();
3836 current_function_decl
= NULL_TREE
;
3837 current_binding_level
= NULL
;
3838 /* Enter the global namespace. */
3839 gcc_assert (global_namespace
== NULL_TREE
);
3840 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3842 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3843 debug_hooks
->register_main_translation_unit
3844 (DECL_CONTEXT (global_namespace
));
3845 TREE_PUBLIC (global_namespace
) = 1;
3846 begin_scope (sk_namespace
, global_namespace
);
3848 if (flag_visibility_ms_compat
)
3849 default_visibility
= VISIBILITY_HIDDEN
;
3852 current_lang_name
= lang_name_c
;
3854 /* Create the `std' namespace. */
3855 push_namespace (std_identifier
);
3856 std_node
= current_namespace
;
3859 c_common_nodes_and_builtins ();
3861 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3862 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3863 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3864 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3865 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3866 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3867 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3868 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3870 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3872 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3873 truthvalue_type_node
= boolean_type_node
;
3874 truthvalue_false_node
= boolean_false_node
;
3875 truthvalue_true_node
= boolean_true_node
;
3877 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3878 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3879 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3882 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3885 delta_type_node
= ptrdiff_type_node
;
3886 vtable_index_type
= ptrdiff_type_node
;
3888 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3889 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3890 void_ftype_ptr
= build_function_type_list (void_type_node
,
3891 ptr_type_node
, NULL_TREE
);
3893 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3895 /* C++ extensions */
3897 unknown_type_node
= make_node (LANG_TYPE
);
3898 record_unknown_type (unknown_type_node
, "unknown type");
3900 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3901 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3903 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3905 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3906 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3908 init_list_type_node
= make_node (LANG_TYPE
);
3909 record_unknown_type (init_list_type_node
, "init list");
3912 /* Make sure we get a unique function type, so we can give
3913 its pointer type a name. (This wins for gdb.) */
3914 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3915 TREE_TYPE (vfunc_type
) = integer_type_node
;
3916 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3917 layout_type (vfunc_type
);
3919 vtable_entry_type
= build_pointer_type (vfunc_type
);
3921 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3924 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3925 layout_type (vtbl_type_node
);
3926 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3927 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3928 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3929 layout_type (vtbl_ptr_type_node
);
3930 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3932 push_namespace (get_identifier ("__cxxabiv1"));
3933 abi_node
= current_namespace
;
3936 global_type_node
= make_node (LANG_TYPE
);
3937 record_unknown_type (global_type_node
, "global type");
3940 current_lang_name
= lang_name_cplusplus
;
3943 tree newattrs
, extvisattr
;
3944 tree newtype
, deltype
;
3945 tree ptr_ftype_sizetype
;
3949 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3950 if (cxx_dialect
== cxx98
)
3953 tree bad_alloc_type_node
;
3954 tree bad_alloc_decl
;
3956 push_namespace (std_identifier
);
3957 bad_alloc_id
= get_identifier ("bad_alloc");
3958 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3959 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3961 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3962 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3966 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3969 new_eh_spec
= noexcept_false_spec
;
3971 /* Ensure attribs.c is initialized. */
3973 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3975 newattrs
= tree_cons (get_identifier ("alloc_size"),
3976 build_tree_list (NULL_TREE
, integer_one_node
),
3978 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3979 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3980 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3981 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3982 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3983 DECL_IS_MALLOC (opnew
) = 1;
3984 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3985 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3986 DECL_IS_MALLOC (opnew
) = 1;
3987 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3988 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3989 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3990 if (flag_sized_deallocation
)
3992 /* Also push the sized deallocation variants:
3993 void operator delete(void*, std::size_t) throw();
3994 void operator delete[](void*, std::size_t) throw(); */
3995 tree void_ftype_ptr_size
3996 = build_function_type_list (void_type_node
, ptr_type_node
,
3997 size_type_node
, NULL_TREE
);
3998 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
4000 deltype
= build_exception_variant (deltype
, empty_except_spec
);
4001 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4002 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4005 nullptr_type_node
= make_node (NULLPTR_TYPE
);
4006 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
4007 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
4008 TYPE_UNSIGNED (nullptr_type_node
) = 1;
4009 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
4010 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
4011 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
4012 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
4016 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
4017 ECF_NORETURN
| ECF_NOTHROW
);
4019 /* Perform other language dependent initializations. */
4020 init_class_processing ();
4021 init_rtti_processing ();
4022 init_template_processing ();
4024 if (flag_exceptions
)
4025 init_exception_processing ();
4027 if (! supports_one_only ())
4030 make_fname_decl
= cp_make_fname_decl
;
4031 start_fname_decls ();
4033 /* Show we use EH for cleanups. */
4034 if (flag_exceptions
)
4035 using_eh_for_cleanups ();
4038 /* Generate an initializer for a function naming variable from
4039 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4040 filled in with the type of the init. */
4043 cp_fname_init (const char* name
, tree
*type_p
)
4045 tree domain
= NULL_TREE
;
4047 tree init
= NULL_TREE
;
4052 length
= strlen (name
);
4053 domain
= build_index_type (size_int (length
));
4054 init
= build_string (length
+ 1, name
);
4057 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4058 type
= build_cplus_array_type (type
, domain
);
4063 TREE_TYPE (init
) = type
;
4065 init
= error_mark_node
;
4070 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4071 the decl, LOC is the location to give the decl, NAME is the
4072 initialization string and TYPE_DEP indicates whether NAME depended
4073 on the type of the function. We make use of that to detect
4074 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4075 at the point of first use, so we mustn't push the decl now. */
4078 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4080 const char *const name
= (type_dep
&& processing_template_decl
4081 ? NULL
: fname_as_string (type_dep
));
4083 tree init
= cp_fname_init (name
, &type
);
4084 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4087 free (CONST_CAST (char *, name
));
4089 /* As we're using pushdecl_with_scope, we must set the context. */
4090 DECL_CONTEXT (decl
) = current_function_decl
;
4092 TREE_STATIC (decl
) = 1;
4093 TREE_READONLY (decl
) = 1;
4094 DECL_ARTIFICIAL (decl
) = 1;
4096 TREE_USED (decl
) = 1;
4098 if (current_function_decl
)
4100 cp_binding_level
*b
= current_binding_level
;
4101 if (b
->kind
== sk_function_parms
)
4102 return error_mark_node
;
4103 while (b
->level_chain
->kind
!= sk_function_parms
)
4105 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4106 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4107 LOOKUP_ONLYCONVERTING
);
4111 DECL_THIS_STATIC (decl
) = true;
4112 pushdecl_top_level_and_finish (decl
, init
);
4119 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4121 tree id
= DECL_NAME (decl
);
4122 const char *name
= IDENTIFIER_POINTER (id
);
4124 retrofit_lang_decl (decl
);
4126 DECL_ARTIFICIAL (decl
) = 1;
4127 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4128 SET_DECL_LANGUAGE (decl
, lang_c
);
4129 /* Runtime library routines are, by definition, available in an
4130 external shared object. */
4131 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4132 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4134 DECL_CONTEXT (decl
) = context
;
4137 pushdecl_top_level (decl
);
4141 /* A function in the user's namespace should have an explicit
4142 declaration before it is used. Mark the built-in function as
4143 anticipated but not actually declared. */
4144 if (name
[0] != '_' || name
[1] != '_')
4145 DECL_ANTICIPATED (decl
) = 1;
4146 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4148 size_t len
= strlen (name
);
4150 /* Treat __*_chk fortification functions as anticipated as well,
4151 unless they are __builtin_*. */
4152 if (len
> strlen ("___chk")
4153 && memcmp (name
+ len
- strlen ("_chk"),
4154 "_chk", strlen ("_chk") + 1) == 0)
4155 DECL_ANTICIPATED (decl
) = 1;
4162 cxx_builtin_function (tree decl
)
4164 tree id
= DECL_NAME (decl
);
4165 const char *name
= IDENTIFIER_POINTER (id
);
4166 /* All builtins that don't begin with an '_' should additionally
4167 go in the 'std' namespace. */
4170 tree decl2
= copy_node(decl
);
4171 push_namespace (std_identifier
);
4172 builtin_function_1 (decl2
, std_node
, false);
4176 return builtin_function_1 (decl
, NULL_TREE
, false);
4179 /* Like cxx_builtin_function, but guarantee the function is added to the global
4180 scope. This is to allow function specific options to add new machine
4181 dependent builtins when the target ISA changes via attribute((target(...)))
4182 which saves space on program startup if the program does not use non-generic
4186 cxx_builtin_function_ext_scope (tree decl
)
4189 tree id
= DECL_NAME (decl
);
4190 const char *name
= IDENTIFIER_POINTER (id
);
4191 /* All builtins that don't begin with an '_' should additionally
4192 go in the 'std' namespace. */
4195 tree decl2
= copy_node(decl
);
4196 push_namespace (std_identifier
);
4197 builtin_function_1 (decl2
, std_node
, true);
4201 return builtin_function_1 (decl
, NULL_TREE
, true);
4204 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4205 function. Not called directly. */
4208 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4211 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4212 DECL_EXTERNAL (fn
) = 1;
4213 TREE_PUBLIC (fn
) = 1;
4214 DECL_ARTIFICIAL (fn
) = 1;
4215 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4216 SET_DECL_LANGUAGE (fn
, lang_c
);
4217 /* Runtime library routines are, by definition, available in an
4218 external shared object. */
4219 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4220 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4221 set_call_expr_flags (fn
, ecf_flags
);
4225 /* Returns the _DECL for a library function with C++ linkage. */
4228 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4231 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4232 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4233 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4237 /* Like build_library_fn, but takes a C string instead of an
4241 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4243 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4246 /* Like build_cp_library_fn, but takes a C string instead of an
4250 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4252 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4256 /* Like build_library_fn, but also pushes the function so that we will
4257 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4258 may throw exceptions listed in RAISES. */
4261 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4266 type
= build_exception_variant (type
, raises
);
4268 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4269 pushdecl_top_level (fn
);
4273 /* Like build_cp_library_fn, but also pushes the function so that it
4274 will be found by normal lookup. */
4277 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4280 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4285 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4289 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4293 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4295 tree type
= build_function_type (void_type_node
, parmtypes
);
4296 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4299 /* Like push_library_fn, but also note that this function throws
4300 and does not return. Used for __throw_foo and the like. */
4303 push_throw_library_fn (tree name
, tree type
)
4305 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4309 /* When we call finish_struct for an anonymous union, we create
4310 default copy constructors and such. But, an anonymous union
4311 shouldn't have such things; this function undoes the damage to the
4312 anonymous union type T.
4314 (The reason that we create the synthesized methods is that we don't
4315 distinguish `union { int i; }' from `typedef union { int i; } U'.
4316 The first is an anonymous union; the second is just an ordinary
4320 fixup_anonymous_aggr (tree t
)
4324 /* Wipe out memory of synthesized methods. */
4325 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4326 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4327 TYPE_HAS_COPY_CTOR (t
) = 0;
4328 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4329 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4330 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4332 /* Splice the implicitly generated functions out of the TYPE_METHODS
4334 q
= &TYPE_METHODS (t
);
4337 if (DECL_ARTIFICIAL (*q
))
4338 *q
= TREE_CHAIN (*q
);
4340 q
= &DECL_CHAIN (*q
);
4343 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4344 if (TYPE_METHODS (t
))
4346 tree decl
= TYPE_MAIN_DECL (t
);
4348 if (TREE_CODE (t
) != UNION_TYPE
)
4349 error_at (DECL_SOURCE_LOCATION (decl
),
4350 "an anonymous struct cannot have function members");
4352 error_at (DECL_SOURCE_LOCATION (decl
),
4353 "an anonymous union cannot have function members");
4356 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4357 assignment operators (because they cannot have these methods themselves).
4358 For anonymous unions this is already checked because they are not allowed
4359 in any union, otherwise we have to check it. */
4360 if (TREE_CODE (t
) != UNION_TYPE
)
4364 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4365 if (TREE_CODE (field
) == FIELD_DECL
)
4367 type
= TREE_TYPE (field
);
4368 if (CLASS_TYPE_P (type
))
4370 if (TYPE_NEEDS_CONSTRUCTING (type
))
4371 error ("member %q+#D with constructor not allowed "
4372 "in anonymous aggregate", field
);
4373 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4374 error ("member %q+#D with destructor not allowed "
4375 "in anonymous aggregate", field
);
4376 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4377 error ("member %q+#D with copy assignment operator "
4378 "not allowed in anonymous aggregate", field
);
4384 /* Warn for an attribute located at LOCATION that appertains to the
4385 class type CLASS_TYPE that has not been properly placed after its
4386 class-key, in it class-specifier. */
4389 warn_misplaced_attr_for_class_type (source_location location
,
4392 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4394 if (warning_at (location
, OPT_Wattributes
,
4395 "attribute ignored in declaration "
4396 "of %q#T", class_type
))
4398 "attribute for %q#T must follow the %qs keyword",
4399 class_type
, class_key_or_enum_as_string (class_type
));
4402 /* Make sure that a declaration with no declarator is well-formed, i.e.
4403 just declares a tagged type or anonymous union.
4405 Returns the type declared; or NULL_TREE if none. */
4408 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4409 bool explicit_type_instantiation_p
)
4411 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4412 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4413 /* If a class, struct, or enum type is declared by the DECLSPECS
4414 (i.e, if a class-specifier, enum-specifier, or non-typename
4415 elaborated-type-specifier appears in the DECLSPECS),
4416 DECLARED_TYPE is set to the corresponding type. */
4417 tree declared_type
= NULL_TREE
;
4418 bool error_p
= false;
4420 if (declspecs
->multiple_types_p
)
4421 error ("multiple types in one declaration");
4422 else if (declspecs
->redefined_builtin_type
)
4424 if (!in_system_header_at (input_location
))
4425 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4426 "redeclaration of C++ built-in type %qT",
4427 declspecs
->redefined_builtin_type
);
4432 && TYPE_P (declspecs
->type
)
4433 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4434 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4435 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4436 declared_type
= declspecs
->type
;
4437 else if (declspecs
->type
== error_mark_node
)
4439 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4440 permerror (input_location
, "declaration does not declare anything");
4441 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4443 error ("%<auto%> can only be specified for variables "
4444 "or function declarations");
4445 return error_mark_node
;
4447 /* Check for an anonymous union. */
4448 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4449 && TYPE_ANONYMOUS_P (declared_type
))
4451 /* 7/3 In a simple-declaration, the optional init-declarator-list
4452 can be omitted only when declaring a class (clause 9) or
4453 enumeration (7.2), that is, when the decl-specifier-seq contains
4454 either a class-specifier, an elaborated-type-specifier with
4455 a class-key (9.1), or an enum-specifier. In these cases and
4456 whenever a class-specifier or enum-specifier is present in the
4457 decl-specifier-seq, the identifiers in these specifiers are among
4458 the names being declared by the declaration (as class-name,
4459 enum-names, or enumerators, depending on the syntax). In such
4460 cases, and except for the declaration of an unnamed bit-field (9.6),
4461 the decl-specifier-seq shall introduce one or more names into the
4462 program, or shall redeclare a name introduced by a previous
4463 declaration. [Example:
4464 enum { }; // ill-formed
4465 typedef class { }; // ill-formed
4469 error ("missing type-name in typedef-declaration");
4472 /* Anonymous unions are objects, so they can have specifiers. */;
4473 SET_ANON_AGGR_TYPE_P (declared_type
);
4475 if (TREE_CODE (declared_type
) != UNION_TYPE
4476 && !in_system_header_at (input_location
))
4477 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4482 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
4483 error_at (declspecs
->locations
[ds_inline
],
4484 "%<inline%> can only be specified for functions");
4485 else if (decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4486 error_at (declspecs
->locations
[ds_virtual
],
4487 "%<virtual%> can only be specified for functions");
4489 && (!current_class_type
4490 || current_scope () != current_class_type
))
4491 error_at (declspecs
->locations
[ds_friend
],
4492 "%<friend%> can only be specified inside a class");
4493 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4494 error_at (declspecs
->locations
[ds_explicit
],
4495 "%<explicit%> can only be specified for constructors");
4496 else if (declspecs
->storage_class
)
4497 error_at (declspecs
->locations
[ds_storage_class
],
4498 "a storage class can only be specified for objects "
4500 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
4501 error_at (declspecs
->locations
[ds_const
],
4502 "%<const%> can only be specified for objects and "
4504 else if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
4505 error_at (declspecs
->locations
[ds_volatile
],
4506 "%<volatile%> can only be specified for objects and "
4508 else if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
4509 error_at (declspecs
->locations
[ds_restrict
],
4510 "%<__restrict%> can only be specified for objects and "
4512 else if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4513 error_at (declspecs
->locations
[ds_thread
],
4514 "%<__thread%> can only be specified for objects "
4516 else if (saw_typedef
)
4517 warning_at (declspecs
->locations
[ds_typedef
], 0,
4518 "%<typedef%> was ignored in this declaration");
4519 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4520 error_at (declspecs
->locations
[ds_constexpr
],
4521 "%<constexpr%> cannot be used for type declarations");
4524 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4527 if (!CLASS_TYPE_P (declared_type
)
4528 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4529 /* For a non-template class, use the name location. */
4530 loc
= location_of (declared_type
);
4532 /* For a template class (an explicit instantiation), use the
4533 current location. */
4534 loc
= input_location
;
4536 if (explicit_type_instantiation_p
)
4537 /* [dcl.attr.grammar]/4:
4539 No attribute-specifier-seq shall appertain to an explicit
4542 if (warning_at (loc
, OPT_Wattributes
,
4543 "attribute ignored in explicit instantiation %q#T",
4546 "no attribute can be applied to "
4547 "an explicit instantiation");
4550 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4553 return declared_type
;
4556 /* Called when a declaration is seen that contains no names to declare.
4557 If its type is a reference to a structure, union or enum inherited
4558 from a containing scope, shadow that tag name for the current scope
4559 with a forward reference.
4560 If its type defines a new named structure or union
4561 or defines an enum, it is valid but we need not do anything here.
4562 Otherwise, it is an error.
4564 C++: may have to grok the declspecs to learn about static,
4565 complain for anonymous unions.
4567 Returns the TYPE declared -- or NULL_TREE if none. */
4570 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4572 tree t
= check_tag_decl (declspecs
,
4573 /*explicit_type_instantiation_p=*/false);
4578 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4581 /* This is where the variables in an anonymous union are
4582 declared. An anonymous union declaration looks like:
4584 because there is no declarator after the union, the parser
4585 sends that declaration here. */
4586 if (ANON_AGGR_TYPE_P (t
))
4588 fixup_anonymous_aggr (t
);
4590 if (TYPE_FIELDS (t
))
4592 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4593 declspecs
, NORMAL
, 0, NULL
);
4594 finish_anon_union (decl
);
4601 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4604 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4605 const cp_declarator
*declarator
,
4606 bool is_template_arg
)
4610 enum decl_context context
4611 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4612 attrs
= type_specifiers
->attributes
;
4613 type_specifiers
->attributes
= NULL_TREE
;
4614 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4615 if (attrs
&& type
!= error_mark_node
)
4617 if (CLASS_TYPE_P (type
))
4618 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4619 "outside of definition", type
);
4620 else if (MAYBE_CLASS_TYPE_P (type
))
4621 /* A template type parameter or other dependent type. */
4622 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4623 "type %qT without an associated declaration", type
);
4625 cplus_decl_attributes (&type
, attrs
, 0);
4630 /* Process a DECLARATOR for a function-scope variable declaration,
4631 namespace-scope variable declaration, or function declaration.
4632 (Function definitions go through start_function; class member
4633 declarations appearing in the body of the class go through
4634 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4635 If an error occurs, the error_mark_node is returned instead.
4637 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4638 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4639 for an explicitly defaulted function, or SD_DELETED for an explicitly
4640 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4641 implicitly initialized via a default constructor. ATTRIBUTES and
4642 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4644 The scope represented by the context of the returned DECL is pushed
4645 (if it is not the global namespace) and is assigned to
4646 *PUSHED_SCOPE_P. The caller is then responsible for calling
4647 pop_scope on *PUSHED_SCOPE_P if it is set. */
4650 start_decl (const cp_declarator
*declarator
,
4651 cp_decl_specifier_seq
*declspecs
,
4654 tree prefix_attributes
,
4655 tree
*pushed_scope_p
)
4663 *pushed_scope_p
= NULL_TREE
;
4665 /* An object declared as __attribute__((deprecated)) suppresses
4666 warnings of uses of other deprecated items. */
4667 if (lookup_attribute ("deprecated", attributes
))
4668 deprecated_state
= DEPRECATED_SUPPRESS
;
4670 attributes
= chainon (attributes
, prefix_attributes
);
4672 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4675 deprecated_state
= DEPRECATED_NORMAL
;
4677 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4678 || decl
== error_mark_node
)
4679 return error_mark_node
;
4681 context
= CP_DECL_CONTEXT (decl
);
4682 if (context
!= global_namespace
)
4683 *pushed_scope_p
= push_scope (context
);
4685 /* Is it valid for this decl to have an initializer at all?
4686 If not, set INITIALIZED to zero, which will indirectly
4687 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4689 && TREE_CODE (decl
) == TYPE_DECL
)
4691 error ("typedef %qD is initialized (use decltype instead)", decl
);
4692 return error_mark_node
;
4697 if (! toplevel_bindings_p ()
4698 && DECL_EXTERNAL (decl
))
4699 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4701 DECL_EXTERNAL (decl
) = 0;
4702 if (toplevel_bindings_p ())
4703 TREE_STATIC (decl
) = 1;
4705 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4707 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4708 record_key_method_defined (decl
);
4710 /* If this is a typedef that names the class for linkage purposes
4711 (7.1.3p8), apply any attributes directly to the type. */
4712 if (TREE_CODE (decl
) == TYPE_DECL
4713 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4714 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4715 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4719 /* Set attributes here so if duplicate decl, will have proper attributes. */
4720 cplus_decl_attributes (&decl
, attributes
, flags
);
4722 /* Dllimported symbols cannot be defined. Static data members (which
4723 can be initialized in-class and dllimported) go through grokfield,
4724 not here, so we don't need to exclude those decls when checking for
4726 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4728 error ("definition of %q#D is marked %<dllimport%>", decl
);
4729 DECL_DLLIMPORT_P (decl
) = 0;
4732 /* If #pragma weak was used, mark the decl weak now. */
4733 if (!processing_template_decl
)
4734 maybe_apply_pragma_weak (decl
);
4736 if (TREE_CODE (decl
) == FUNCTION_DECL
4737 && DECL_DECLARED_INLINE_P (decl
)
4738 && DECL_UNINLINABLE (decl
)
4739 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4740 warning (0, "inline function %q+D given attribute noinline", decl
);
4742 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4744 bool this_tmpl
= (processing_template_decl
4745 > template_class_depth (context
));
4748 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4749 if (field
== NULL_TREE
4750 || !(VAR_P (field
) || variable_template_p (field
)))
4751 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4752 else if (variable_template_p (field
) && !this_tmpl
)
4754 if (DECL_LANG_SPECIFIC (decl
)
4755 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4756 /* OK, specialization was already checked. */;
4759 error_at (DECL_SOURCE_LOCATION (decl
),
4760 "non-member-template declaration of %qD", decl
);
4761 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4762 "member template declaration here");
4763 return error_mark_node
;
4768 if (variable_template_p (field
))
4769 field
= DECL_TEMPLATE_RESULT (field
);
4771 if (DECL_CONTEXT (field
) != context
)
4773 if (!same_type_p (DECL_CONTEXT (field
), context
))
4774 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4775 "to be defined as %<%T::%D%>",
4776 DECL_CONTEXT (field
), DECL_NAME (decl
),
4777 context
, DECL_NAME (decl
));
4778 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4780 /* Static data member are tricky; an in-class initialization
4781 still doesn't provide a definition, so the in-class
4782 declaration will have DECL_EXTERNAL set, but will have an
4783 initialization. Thus, duplicate_decls won't warn
4784 about this situation, and so we check here. */
4785 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4786 error ("duplicate initialization of %qD", decl
);
4787 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4789 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4790 && !DECL_DECLARED_CONSTEXPR_P (field
))
4791 error ("%qD declared %<constexpr%> outside its class", field
);
4796 tree field
= check_classfn (context
, decl
,
4798 ? current_template_parms
4800 if (field
&& field
!= error_mark_node
4801 && duplicate_decls (decl
, field
,
4802 /*newdecl_is_friend=*/false))
4806 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4807 DECL_IN_AGGR_P (decl
) = 0;
4808 /* Do not mark DECL as an explicit specialization if it was not
4809 already marked as an instantiation; a declaration should
4810 never be marked as a specialization unless we know what
4811 template is being specialized. */
4812 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4814 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4815 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4816 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4817 && DECL_DECLARED_INLINE_P (decl
));
4819 DECL_COMDAT (decl
) = false;
4821 /* [temp.expl.spec] An explicit specialization of a static data
4822 member of a template is a definition if the declaration
4823 includes an initializer; otherwise, it is a declaration.
4825 We check for processing_specialization so this only applies
4826 to the new specialization syntax. */
4827 if (!initialized
&& processing_specialization
)
4828 DECL_EXTERNAL (decl
) = 1;
4831 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4832 /* Aliases are definitions. */
4834 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4838 was_public
= TREE_PUBLIC (decl
);
4840 /* Enter this declaration into the symbol table. Don't push the plain
4841 VAR_DECL for a variable template. */
4842 if (!template_parm_scope_p ()
4844 decl
= maybe_push_decl (decl
);
4846 if (processing_template_decl
)
4847 decl
= push_template_decl (decl
);
4848 if (decl
== error_mark_node
)
4849 return error_mark_node
;
4852 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4853 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4855 /* This is a const variable with implicit 'static'. Set
4856 DECL_THIS_STATIC so we can tell it from variables that are
4857 !TREE_PUBLIC because of the anonymous namespace. */
4858 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4859 DECL_THIS_STATIC (decl
) = 1;
4862 if (current_function_decl
&& VAR_P (decl
)
4863 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4866 if (CP_DECL_THREAD_LOCAL_P (decl
))
4867 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4869 else if (TREE_STATIC (decl
))
4870 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4874 cp_function_chain
->invalid_constexpr
= true;
4877 if (!processing_template_decl
&& VAR_P (decl
))
4878 start_decl_1 (decl
, initialized
);
4883 /* Process the declaration of a variable DECL. INITIALIZED is true
4884 iff DECL is explicitly initialized. (INITIALIZED is false if the
4885 variable is initialized via an implicitly-called constructor.)
4886 This function must be called for ordinary variables (including, for
4887 example, implicit instantiations of templates), but must not be
4888 called for template declarations. */
4891 start_decl_1 (tree decl
, bool initialized
)
4895 bool aggregate_definition_p
;
4897 gcc_assert (!processing_template_decl
);
4899 if (error_operand_p (decl
))
4902 gcc_assert (VAR_P (decl
));
4904 type
= TREE_TYPE (decl
);
4905 complete_p
= COMPLETE_TYPE_P (type
);
4906 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4908 /* If an explicit initializer is present, or if this is a definition
4909 of an aggregate, then we need a complete type at this point.
4910 (Scalars are always complete types, so there is nothing to
4911 check.) This code just sets COMPLETE_P; errors (if necessary)
4912 are issued below. */
4913 if ((initialized
|| aggregate_definition_p
)
4915 && COMPLETE_TYPE_P (complete_type (type
)))
4918 /* We will not yet have set TREE_READONLY on DECL if the type
4919 was "const", but incomplete, before this point. But, now, we
4920 have a complete type, so we can try again. */
4921 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4925 /* Is it valid for this decl to have an initializer at all? */
4927 /* Don't allow initializations for incomplete types except for
4928 arrays which might be completed by the initialization. */
4930 ; /* A complete type is ok. */
4931 else if (type_uses_auto (type
))
4932 ; /* An auto type is ok. */
4933 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4935 error ("variable %q#D has initializer but incomplete type", decl
);
4936 type
= TREE_TYPE (decl
) = error_mark_node
;
4938 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4940 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4941 error ("elements of array %q#D have incomplete type", decl
);
4942 /* else we already gave an error in start_decl. */
4945 else if (aggregate_definition_p
&& !complete_p
)
4947 if (type_uses_auto (type
))
4948 error ("declaration of %q#D has no initializer", decl
);
4950 error ("aggregate %q#D has incomplete type and cannot be defined",
4952 /* Change the type so that assemble_variable will give
4953 DECL an rtl we can live with: (mem (const_int 0)). */
4954 type
= TREE_TYPE (decl
) = error_mark_node
;
4957 /* Create a new scope to hold this declaration if necessary.
4958 Whether or not a new scope is necessary cannot be determined
4959 until after the type has been completed; if the type is a
4960 specialization of a class template it is not until after
4961 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4962 will be set correctly. */
4963 maybe_push_cleanup_level (type
);
4966 /* Handle initialization of references. DECL, TYPE, and INIT have the
4967 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4968 but will be set to a new CLEANUP_STMT if a temporary is created
4969 that must be destroyed subsequently.
4971 Returns an initializer expression to use to initialize DECL, or
4972 NULL if the initialization can be performed statically.
4974 Quotes on semantics can be found in ARM 8.4.3. */
4977 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4979 if (init
== NULL_TREE
)
4981 if ((DECL_LANG_SPECIFIC (decl
) == 0
4982 || DECL_IN_AGGR_P (decl
) == 0)
4983 && ! DECL_THIS_EXTERN (decl
))
4984 error ("%qD declared as reference but not initialized", decl
);
4988 if (TREE_CODE (init
) == TREE_LIST
)
4989 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4990 tf_warning_or_error
);
4992 tree ttype
= TREE_TYPE (type
);
4993 if (TREE_CODE (ttype
) != ARRAY_TYPE
4994 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4995 /* Note: default conversion is only called in very special cases. */
4996 init
= decay_conversion (init
, tf_warning_or_error
);
4998 /* check_initializer handles this for non-reference variables, but for
4999 references we need to do it here or the initializer will get the
5000 incomplete array type and confuse later calls to
5001 cp_complete_array_type. */
5002 if (TREE_CODE (ttype
) == ARRAY_TYPE
5003 && TYPE_DOMAIN (ttype
) == NULL_TREE
5004 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
5005 || TREE_CODE (init
) == STRING_CST
))
5007 cp_complete_array_type (&ttype
, init
, false);
5008 if (ttype
!= TREE_TYPE (type
))
5009 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
5012 /* Convert INIT to the reference type TYPE. This may involve the
5013 creation of a temporary, whose lifetime must be the same as that
5014 of the reference. If so, a DECL_EXPR for the temporary will be
5015 added just after the DECL_EXPR for DECL. That's why we don't set
5016 DECL_INITIAL for local references (instead assigning to them
5017 explicitly); we need to allow the temporary to be initialized
5019 return initialize_reference (type
, init
, flags
,
5020 tf_warning_or_error
);
5023 /* Designated initializers in arrays are not supported in GNU C++.
5024 The parser cannot detect this error since it does not know whether
5025 a given brace-enclosed initializer is for a class type or for an
5026 array. This function checks that CE does not use a designated
5027 initializer. If it does, an error is issued. Returns true if CE
5028 is valid, i.e., does not have a designated initializer. */
5031 check_array_designated_initializer (constructor_elt
*ce
,
5032 unsigned HOST_WIDE_INT index
)
5034 /* Designated initializers for array elements are not supported. */
5037 /* The parser only allows identifiers as designated
5039 if (ce
->index
== error_mark_node
)
5041 error ("name used in a GNU-style designated "
5042 "initializer for an array");
5045 else if (identifier_p (ce
->index
))
5047 error ("name %qD used in a GNU-style designated "
5048 "initializer for an array", ce
->index
);
5052 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5055 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5056 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5059 /* A C99 designator is OK if it matches the current index. */
5060 if (wi::eq_p (ce_index
, index
))
5063 sorry ("non-trivial designated initializers not supported");
5066 error ("C99 designator %qE is not an integral constant-expression",
5075 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5076 array until we finish parsing the initializer. If that's the
5077 situation we're in, update DECL accordingly. */
5080 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5082 tree type
= TREE_TYPE (decl
);
5084 if (TREE_CODE (type
) == ARRAY_TYPE
5085 && TYPE_DOMAIN (type
) == NULL_TREE
5086 && TREE_CODE (decl
) != TYPE_DECL
)
5088 /* do_default is really a C-ism to deal with tentative definitions.
5089 But let's leave it here to ease the eventual merge. */
5090 int do_default
= !DECL_EXTERNAL (decl
);
5091 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5094 /* Check that there are no designated initializers in INIT, as
5095 those are not supported in GNU C++, and as the middle-end
5096 will crash if presented with a non-numeric designated
5098 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5100 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5101 constructor_elt
*ce
;
5103 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5104 if (!check_array_designated_initializer (ce
, i
))
5110 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5114 error ("initializer fails to determine size of %qD", decl
);
5116 else if (failure
== 2)
5120 error ("array size missing in %qD", decl
);
5122 /* If a `static' var's size isn't known, make it extern as
5123 well as static, so it does not get allocated. If it's not
5124 `static', then don't mark it extern; finish_incomplete_decl
5125 will give it a default size and it will get allocated. */
5126 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5127 DECL_EXTERNAL (decl
) = 1;
5129 else if (failure
== 3)
5131 error ("zero-size array %qD", decl
);
5135 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5137 relayout_decl (decl
);
5141 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5142 any appropriate error messages regarding the layout. */
5145 layout_var_decl (tree decl
)
5149 type
= TREE_TYPE (decl
);
5150 if (type
== error_mark_node
)
5153 /* If we haven't already laid out this declaration, do so now.
5154 Note that we must not call complete type for an external object
5155 because it's type might involve templates that we are not
5156 supposed to instantiate yet. (And it's perfectly valid to say
5157 `extern X x' for some incomplete type `X'.) */
5158 if (!DECL_EXTERNAL (decl
))
5159 complete_type (type
);
5160 if (!DECL_SIZE (decl
)
5161 && TREE_TYPE (decl
) != error_mark_node
5162 && (COMPLETE_TYPE_P (type
)
5163 || (TREE_CODE (type
) == ARRAY_TYPE
5164 && !TYPE_DOMAIN (type
)
5165 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5166 layout_decl (decl
, 0);
5168 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5170 /* An automatic variable with an incomplete type: that is an error.
5171 Don't talk about array types here, since we took care of that
5172 message in grokdeclarator. */
5173 error ("storage size of %qD isn%'t known", decl
);
5174 TREE_TYPE (decl
) = error_mark_node
;
5177 /* Keep this code around in case we later want to control debug info
5178 based on whether a type is "used". (jason 1999-11-11) */
5180 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5181 /* Let debugger know it should output info for this type. */
5182 note_debug_info_needed (ttype
);
5184 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5185 note_debug_info_needed (DECL_CONTEXT (decl
));
5188 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5189 && DECL_SIZE (decl
) != NULL_TREE
5190 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5192 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5193 constant_expression_warning (DECL_SIZE (decl
));
5196 error ("storage size of %qD isn%'t constant", decl
);
5197 TREE_TYPE (decl
) = error_mark_node
;
5202 /* If a local static variable is declared in an inline function, or if
5203 we have a weak definition, we must endeavor to create only one
5204 instance of the variable at link-time. */
5207 maybe_commonize_var (tree decl
)
5209 /* Static data in a function with comdat linkage also has comdat
5211 if (TREE_STATIC (decl
)
5212 /* Don't mess with __FUNCTION__. */
5213 && ! DECL_ARTIFICIAL (decl
)
5214 && DECL_FUNCTION_SCOPE_P (decl
)
5215 && vague_linkage_p (DECL_CONTEXT (decl
)))
5219 /* With weak symbols, we simply make the variable COMDAT;
5220 that will cause copies in multiple translations units to
5222 comdat_linkage (decl
);
5226 if (DECL_INITIAL (decl
) == NULL_TREE
5227 || DECL_INITIAL (decl
) == error_mark_node
)
5229 /* Without weak symbols, we can use COMMON to merge
5230 uninitialized variables. */
5231 TREE_PUBLIC (decl
) = 1;
5232 DECL_COMMON (decl
) = 1;
5236 /* While for initialized variables, we must use internal
5237 linkage -- which means that multiple copies will not
5239 TREE_PUBLIC (decl
) = 0;
5240 DECL_COMMON (decl
) = 0;
5241 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5242 "sorry: semantics of inline function static "
5243 "data %q#D are wrong (you%'ll wind up "
5244 "with multiple copies)", decl
))
5245 inform (DECL_SOURCE_LOCATION (decl
),
5246 "you can work around this by removing the initializer");
5252 /* Issue an error message if DECL is an uninitialized const variable. */
5255 check_for_uninitialized_const_var (tree decl
)
5257 tree type
= strip_array_types (TREE_TYPE (decl
));
5259 /* ``Unless explicitly declared extern, a const object does not have
5260 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5263 && TREE_CODE (type
) != REFERENCE_TYPE
5264 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5265 && !DECL_INITIAL (decl
))
5267 tree field
= default_init_uninitialized_part (type
);
5271 if (CP_TYPE_CONST_P (type
))
5272 permerror (DECL_SOURCE_LOCATION (decl
),
5273 "uninitialized const %qD", decl
);
5276 error_at (DECL_SOURCE_LOCATION (decl
),
5277 "uninitialized variable %qD in %<constexpr%> function",
5279 cp_function_chain
->invalid_constexpr
= true;
5282 if (CLASS_TYPE_P (type
))
5284 tree defaulted_ctor
;
5286 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5287 "%q#T has no user-provided default constructor", type
);
5288 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5290 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5291 "constructor is not user-provided because it is "
5292 "explicitly defaulted in the class body");
5293 inform (0, "and the implicitly-defined constructor does not "
5294 "initialize %q+#D", field
);
5299 /* Structure holding the current initializer being processed by reshape_init.
5300 CUR is a pointer to the current element being processed, END is a pointer
5301 after the last element present in the initializer. */
5302 typedef struct reshape_iterator_t
5304 constructor_elt
*cur
;
5305 constructor_elt
*end
;
5308 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5310 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5311 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5312 initialized. If there are no more such fields, the return value
5316 next_initializable_field (tree field
)
5319 && (TREE_CODE (field
) != FIELD_DECL
5320 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5321 || DECL_ARTIFICIAL (field
)))
5322 field
= DECL_CHAIN (field
);
5327 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5328 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5329 INTEGER_CST representing the size of the array minus one (the maximum index),
5330 or NULL_TREE if the array was declared without specifying the size. D is
5331 the iterator within the constructor. */
5334 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5335 tsubst_flags_t complain
)
5338 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5339 unsigned HOST_WIDE_INT max_index_cst
= 0;
5340 unsigned HOST_WIDE_INT index
;
5342 /* The initializer for an array is always a CONSTRUCTOR. */
5343 new_init
= build_constructor (init_list_type_node
, NULL
);
5347 /* Minus 1 is used for zero sized arrays. */
5348 if (integer_all_onesp (max_index
))
5351 if (tree_fits_uhwi_p (max_index
))
5352 max_index_cst
= tree_to_uhwi (max_index
);
5353 /* sizetype is sign extended, not zero extended. */
5355 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5358 /* Loop until there are no more initializers. */
5360 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5364 constructor_elt
*old_cur
= d
->cur
;
5366 check_array_designated_initializer (d
->cur
, index
);
5367 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5369 if (elt_init
== error_mark_node
)
5370 return error_mark_node
;
5371 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5372 size_int (index
), elt_init
);
5373 if (!TREE_CONSTANT (elt_init
))
5374 TREE_CONSTANT (new_init
) = false;
5376 /* This can happen with an invalid initializer (c++/54501). */
5377 if (d
->cur
== old_cur
&& !sized_array_p
)
5384 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5385 Parameters are the same of reshape_init_r. */
5388 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5390 tree max_index
= NULL_TREE
;
5392 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5394 if (TYPE_DOMAIN (type
))
5395 max_index
= array_type_nelts (type
);
5397 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5400 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5401 Parameters are the same of reshape_init_r. */
5404 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5406 tree max_index
= NULL_TREE
;
5408 gcc_assert (VECTOR_TYPE_P (type
));
5410 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5412 tree value
= d
->cur
->value
;
5413 if (!same_type_p (TREE_TYPE (value
), type
))
5415 if (complain
& tf_error
)
5416 error ("invalid type %qT as initializer for a vector of type %qT",
5417 TREE_TYPE (d
->cur
->value
), type
);
5418 value
= error_mark_node
;
5424 /* For a vector, we initialize it as an array of the appropriate size. */
5425 if (VECTOR_TYPE_P (type
))
5426 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5428 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5431 /* Subroutine of reshape_init_r, processes the initializers for classes
5432 or union. Parameters are the same of reshape_init_r. */
5435 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5436 tsubst_flags_t complain
)
5441 gcc_assert (CLASS_TYPE_P (type
));
5443 /* The initializer for a class is always a CONSTRUCTOR. */
5444 new_init
= build_constructor (init_list_type_node
, NULL
);
5445 field
= next_initializable_field (TYPE_FIELDS (type
));
5451 An initializer for an aggregate member that is an
5452 empty class shall have the form of an empty
5453 initializer-list {}. */
5454 if (!first_initializer_p
)
5456 if (complain
& tf_error
)
5457 error ("initializer for %qT must be brace-enclosed", type
);
5458 return error_mark_node
;
5463 /* Loop through the initializable fields, gathering initializers. */
5464 while (d
->cur
!= d
->end
)
5467 constructor_elt
*old_cur
= d
->cur
;
5469 /* Handle designated initializers, as an extension. */
5472 if (d
->cur
->index
== error_mark_node
)
5473 return error_mark_node
;
5475 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5476 /* We already reshaped this. */
5477 gcc_assert (d
->cur
->index
== field
);
5478 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5479 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5482 if (complain
& tf_error
)
5483 error ("%<[%E] =%> used in a GNU-style designated initializer"
5484 " for class %qT", d
->cur
->index
, type
);
5485 return error_mark_node
;
5488 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5490 if (complain
& tf_error
)
5491 error ("%qT has no non-static data member named %qD", type
,
5493 return error_mark_node
;
5497 /* If we processed all the member of the class, we are done. */
5501 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5502 /*first_initializer_p=*/false, complain
);
5503 if (field_init
== error_mark_node
)
5504 return error_mark_node
;
5506 if (d
->cur
== old_cur
&& d
->cur
->index
)
5508 /* This can happen with an invalid initializer for a flexible
5509 array member (c++/54441). */
5510 if (complain
& tf_error
)
5511 error ("invalid initializer for %q#D", field
);
5512 return error_mark_node
;
5515 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5519 When a union is initialized with a brace-enclosed
5520 initializer, the braces shall only contain an
5521 initializer for the first member of the union. */
5522 if (TREE_CODE (type
) == UNION_TYPE
)
5525 field
= next_initializable_field (DECL_CHAIN (field
));
5531 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5532 designators are not valid; either complain or return true to indicate
5533 that reshape_init_r should return error_mark_node. */
5536 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5540 if (complain
& tf_error
)
5541 error ("C99 designator %qE outside aggregate initializer",
5549 /* Subroutine of reshape_init, which processes a single initializer (part of
5550 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5551 iterator within the CONSTRUCTOR which points to the initializer to process.
5552 FIRST_INITIALIZER_P is true if this is the first initializer of the
5553 outermost CONSTRUCTOR node. */
5556 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5557 tsubst_flags_t complain
)
5559 tree init
= d
->cur
->value
;
5561 if (error_operand_p (init
))
5562 return error_mark_node
;
5564 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5565 && has_designator_problem (d
, complain
))
5566 return error_mark_node
;
5568 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5570 /* A complex type can be initialized from one or two initializers,
5571 but braces are not elided. */
5573 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5575 if (CONSTRUCTOR_NELTS (init
) > 2)
5577 if (complain
& tf_error
)
5578 error ("too many initializers for %qT", type
);
5580 return error_mark_node
;
5583 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5585 vec
<constructor_elt
, va_gc
> *v
= 0;
5586 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5587 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5588 if (has_designator_problem (d
, complain
))
5589 return error_mark_node
;
5591 init
= build_constructor (init_list_type_node
, v
);
5596 /* A non-aggregate type is always initialized with a single
5598 if (!CP_AGGREGATE_TYPE_P (type
))
5600 /* It is invalid to initialize a non-aggregate type with a
5601 brace-enclosed initializer before C++0x.
5602 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5603 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5604 a CONSTRUCTOR (with a record type). */
5605 if (TREE_CODE (init
) == CONSTRUCTOR
5606 /* Don't complain about a capture-init. */
5607 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5608 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5610 if (SCALAR_TYPE_P (type
))
5612 if (cxx_dialect
< cxx11
5613 /* Isn't value-initialization. */
5614 || CONSTRUCTOR_NELTS (init
) > 0)
5616 if (complain
& tf_error
)
5617 error ("braces around scalar initializer for type %qT",
5619 init
= error_mark_node
;
5623 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5630 /* "If T is a class type and the initializer list has a single element of
5631 type cv U, where U is T or a class derived from T, the object is
5632 initialized from that element." Even if T is an aggregate. */
5633 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5634 && first_initializer_p
5635 && d
->end
- d
->cur
== 1
5636 && reference_related_p (type
, TREE_TYPE (init
)))
5644 All implicit type conversions (clause _conv_) are considered when
5645 initializing the aggregate member with an initializer from an
5646 initializer-list. If the initializer can initialize a member,
5647 the member is initialized. Otherwise, if the member is itself a
5648 non-empty subaggregate, brace elision is assumed and the
5649 initializer is considered for the initialization of the first
5650 member of the subaggregate. */
5651 if (TREE_CODE (init
) != CONSTRUCTOR
5652 /* But don't try this for the first initializer, since that would be
5653 looking through the outermost braces; A a2 = { a1 }; is not a
5654 valid aggregate initialization. */
5655 && !first_initializer_p
5656 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5657 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5664 /* [dcl.init.string]
5666 A char array (whether plain char, signed char, or unsigned char)
5667 can be initialized by a string-literal (optionally enclosed in
5668 braces); a wchar_t array can be initialized by a wide
5669 string-literal (optionally enclosed in braces). */
5670 if (TREE_CODE (type
) == ARRAY_TYPE
5671 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5673 tree str_init
= init
;
5675 /* Strip one level of braces if and only if they enclose a single
5676 element (as allowed by [dcl.init.string]). */
5677 if (!first_initializer_p
5678 && TREE_CODE (str_init
) == CONSTRUCTOR
5679 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5681 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5684 /* If it's a string literal, then it's the initializer for the array
5685 as a whole. Otherwise, continue with normal initialization for
5686 array types (one value per array element). */
5687 if (TREE_CODE (str_init
) == STRING_CST
)
5689 if (has_designator_problem (d
, complain
))
5690 return error_mark_node
;
5696 /* The following cases are about aggregates. If we are not within a full
5697 initializer already, and there is not a CONSTRUCTOR, it means that there
5698 is a missing set of braces (that is, we are processing the case for
5699 which reshape_init exists). */
5700 if (!first_initializer_p
)
5702 if (TREE_CODE (init
) == CONSTRUCTOR
)
5704 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5705 /* There is no need to reshape pointer-to-member function
5706 initializers, as they are always constructed correctly
5707 by the front end. */
5709 else if (COMPOUND_LITERAL_P (init
))
5710 /* For a nested compound literal, there is no need to reshape since
5711 brace elision is not allowed. Even if we decided to allow it,
5712 we should add a call to reshape_init in finish_compound_literal,
5713 before calling digest_init, so changing this code would still
5714 not be necessary. */
5715 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5719 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5720 return reshape_init (type
, init
, complain
);
5724 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5728 /* Dispatch to specialized routines. */
5729 if (CLASS_TYPE_P (type
))
5730 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5731 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5732 return reshape_init_array (type
, d
, complain
);
5733 else if (VECTOR_TYPE_P (type
))
5734 return reshape_init_vector (type
, d
, complain
);
5739 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5740 brace-enclosed aggregate initializer.
5742 INIT is the CONSTRUCTOR containing the list of initializers describing
5743 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5744 It may not presently match the shape of the TYPE; for example:
5746 struct S { int a; int b; };
5747 struct S a[] = { 1, 2, 3, 4 };
5749 Here INIT will hold a vector of four elements, rather than a
5750 vector of two elements, each itself a vector of two elements. This
5751 routine transforms INIT from the former form into the latter. The
5752 revised CONSTRUCTOR node is returned. */
5755 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5757 vec
<constructor_elt
, va_gc
> *v
;
5761 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5763 v
= CONSTRUCTOR_ELTS (init
);
5765 /* An empty constructor does not need reshaping, and it is always a valid
5767 if (vec_safe_is_empty (v
))
5770 /* Recurse on this CONSTRUCTOR. */
5772 d
.end
= d
.cur
+ v
->length ();
5774 new_init
= reshape_init_r (type
, &d
, true, complain
);
5775 if (new_init
== error_mark_node
)
5776 return error_mark_node
;
5778 /* Make sure all the element of the constructor were used. Otherwise,
5779 issue an error about exceeding initializers. */
5782 if (complain
& tf_error
)
5783 error ("too many initializers for %qT", type
);
5785 return error_mark_node
;
5791 /* Verify array initializer. Returns true if errors have been reported. */
5794 check_array_initializer (tree decl
, tree type
, tree init
)
5796 tree element_type
= TREE_TYPE (type
);
5798 /* The array type itself need not be complete, because the
5799 initializer may tell us how many elements are in the array.
5800 But, the elements of the array must be complete. */
5801 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5804 error ("elements of array %q#D have incomplete type", decl
);
5806 error ("elements of array %q#T have incomplete type", type
);
5809 /* A compound literal can't have variable size. */
5811 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5812 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5814 error ("variable-sized compound literal");
5820 /* Subroutine of check_initializer; args are passed down from that function.
5821 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5824 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5827 gcc_assert (stmts_are_full_exprs_p ());
5828 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5831 /* Verify INIT (the initializer for DECL), and record the
5832 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5833 grok_reference_init.
5835 If the return value is non-NULL, it is an expression that must be
5836 evaluated dynamically to initialize DECL. */
5839 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5841 tree type
= TREE_TYPE (decl
);
5842 tree init_code
= NULL
;
5845 /* Things that are going to be initialized need to have complete
5847 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5849 if (DECL_HAS_VALUE_EXPR_P (decl
))
5851 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5852 it doesn't have storage to be initialized. */
5853 gcc_assert (init
== NULL_TREE
);
5857 if (type
== error_mark_node
)
5858 /* We will have already complained. */
5861 if (TREE_CODE (type
) == ARRAY_TYPE
)
5863 if (check_array_initializer (decl
, type
, init
))
5866 else if (!COMPLETE_TYPE_P (type
))
5868 error ("%q#D has incomplete type", decl
);
5869 TREE_TYPE (decl
) = error_mark_node
;
5873 /* There is no way to make a variable-sized class type in GNU C++. */
5874 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5876 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5878 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5879 if (SCALAR_TYPE_P (type
))
5883 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5884 init
= build_zero_init (type
, NULL_TREE
, false);
5886 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5888 error ("scalar object %qD requires one element in initializer",
5890 TREE_TYPE (decl
) = error_mark_node
;
5896 if (TREE_CODE (decl
) == CONST_DECL
)
5898 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5900 DECL_INITIAL (decl
) = init
;
5902 gcc_assert (init
!= NULL_TREE
);
5905 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5907 else if (init
|| type_build_ctor_call (type
)
5908 || TREE_CODE (type
) == REFERENCE_TYPE
)
5910 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5912 init
= grok_reference_init (decl
, type
, init
, flags
);
5913 flags
|= LOOKUP_ALREADY_DIGESTED
;
5916 check_for_uninitialized_const_var (decl
);
5917 /* Do not reshape constructors of vectors (they don't need to be
5919 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5921 if (is_std_init_list (type
))
5923 init
= perform_implicit_conversion (type
, init
,
5924 tf_warning_or_error
);
5925 flags
|= LOOKUP_ALREADY_DIGESTED
;
5927 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5929 /* Don't reshape if the class has constructors. */
5930 if (cxx_dialect
== cxx98
)
5931 error ("in C++98 %qD must be initialized by constructor, "
5935 else if (VECTOR_TYPE_P (type
) && TYPE_VECTOR_OPAQUE (type
))
5937 error ("opaque vector types cannot be initialized");
5938 init
= error_mark_node
;
5942 init
= reshape_init (type
, init
, tf_warning_or_error
);
5943 flags
|= LOOKUP_NO_NARROWING
;
5946 else if (TREE_CODE (init
) == TREE_LIST
5947 && TREE_TYPE (init
) != unknown_type_node
5948 && !MAYBE_CLASS_TYPE_P (type
))
5950 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5952 /* We get here with code like `int a (2);' */
5953 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5954 tf_warning_or_error
);
5957 /* If DECL has an array type without a specific bound, deduce the
5958 array size from the initializer. */
5959 maybe_deduce_size_from_array_init (decl
, init
);
5960 type
= TREE_TYPE (decl
);
5961 if (type
== error_mark_node
)
5964 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5965 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5966 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5967 && CP_AGGREGATE_TYPE_P (type
)
5968 && (CLASS_TYPE_P (type
)
5969 || !TYPE_NEEDS_CONSTRUCTING (type
)
5970 || type_has_extended_temps (type
))))
5972 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5974 /* A constructor call is a non-trivial initializer even if
5975 it isn't explicitly written. */
5976 if (TREE_SIDE_EFFECTS (init_code
))
5977 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5979 /* If this is a constexpr initializer, expand_default_init will
5980 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5981 case, pull the initializer back out and pass it down into
5982 store_init_value. */
5983 while (TREE_CODE (init_code
) == EXPR_STMT
5984 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5985 init_code
= TREE_OPERAND (init_code
, 0);
5986 if (TREE_CODE (init_code
) == INIT_EXPR
)
5988 init
= TREE_OPERAND (init_code
, 1);
5989 init_code
= NULL_TREE
;
5990 /* Don't call digest_init; it's unnecessary and will complain
5991 about aggregate initialization of non-aggregate classes. */
5992 flags
|= LOOKUP_ALREADY_DIGESTED
;
5994 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5996 /* Declared constexpr, but no suitable initializer; massage
5997 init appropriately so we can pass it into store_init_value
5999 if (CLASS_TYPE_P (type
)
6000 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
6002 init
= build_functional_cast (type
, init
, tf_none
);
6003 if (TREE_CODE (init
) == TARGET_EXPR
)
6004 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
6006 init_code
= NULL_TREE
;
6012 if (init
&& TREE_CODE (init
) != TREE_VEC
)
6014 /* In aggregate initialization of a variable, each element
6015 initialization is a full-expression because there is no
6016 enclosing expression. */
6017 gcc_assert (stmts_are_full_exprs_p ());
6019 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
6021 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
6022 && DECL_INITIAL (decl
)
6023 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
6024 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
6025 warning (0, "array %qD initialized by parenthesized string literal %qE",
6026 decl
, DECL_INITIAL (decl
));
6032 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
6033 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
6034 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
6035 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
6038 check_for_uninitialized_const_var (decl
);
6041 if (init
&& init
!= error_mark_node
)
6042 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
6046 /* We might have set these in cp_finish_decl. */
6047 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
6048 TREE_CONSTANT (decl
) = false;
6051 if (init_code
&& DECL_IN_AGGR_P (decl
))
6053 static int explained
= 0;
6055 if (cxx_dialect
< cxx11
)
6056 error ("initializer invalid for static member with constructor");
6058 error ("non-constant in-class initialization invalid for static "
6059 "member %qD", decl
);
6062 inform (input_location
,
6063 "(an out of class initialization is required)");
6072 /* If DECL is not a local variable, give it RTL. */
6075 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6077 int toplev
= toplevel_bindings_p ();
6080 /* Set the DECL_ASSEMBLER_NAME for the object. */
6083 /* The `register' keyword, when used together with an
6084 asm-specification, indicates that the variable should be
6085 placed in a particular register. */
6086 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6088 set_user_assembler_name (decl
, asmspec
);
6089 DECL_HARD_REGISTER (decl
) = 1;
6093 if (TREE_CODE (decl
) == FUNCTION_DECL
6094 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6095 set_builtin_user_assembler_name (decl
, asmspec
);
6096 set_user_assembler_name (decl
, asmspec
);
6100 /* Handle non-variables up front. */
6103 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6107 /* If we see a class member here, it should be a static data
6109 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6111 gcc_assert (TREE_STATIC (decl
));
6112 /* An in-class declaration of a static data member should be
6113 external; it is only a declaration, and not a definition. */
6114 if (init
== NULL_TREE
)
6115 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6118 /* We don't create any RTL for local variables. */
6119 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6122 /* We defer emission of local statics until the corresponding
6123 DECL_EXPR is expanded. */
6124 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6126 /* Defer template instantiations. */
6127 if (DECL_LANG_SPECIFIC (decl
)
6128 && DECL_IMPLICIT_INSTANTIATION (decl
))
6131 /* If we're not deferring, go ahead and assemble the variable. */
6133 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6136 /* walk_tree helper for wrap_temporary_cleanups, below. */
6139 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6141 /* Stop at types or full-expression boundaries. */
6142 if (TYPE_P (*stmt_p
)
6143 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6149 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6151 tree guard
= (tree
)data
;
6152 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6154 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6155 /* Tell honor_protect_cleanup_actions to handle this as a separate
6157 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6159 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6165 /* We're initializing a local variable which has a cleanup GUARD. If there
6166 are any temporaries used in the initializer INIT of this variable, we
6167 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6168 variable will be cleaned up properly if one of them throws.
6170 Unfortunately, there's no way to express this properly in terms of
6171 nesting, as the regions for the temporaries overlap the region for the
6172 variable itself; if there are two temporaries, the variable needs to be
6173 the first thing destroyed if either of them throws. However, we only
6174 want to run the variable's cleanup if it actually got constructed. So
6175 we need to guard the temporary cleanups with the variable's cleanup if
6176 they are run on the normal path, but not if they are run on the
6177 exceptional path. We implement this by telling
6178 honor_protect_cleanup_actions to strip the variable cleanup from the
6179 exceptional path. */
6182 wrap_temporary_cleanups (tree init
, tree guard
)
6184 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6187 /* Generate code to initialize DECL (a local variable). */
6190 initialize_local_var (tree decl
, tree init
)
6192 tree type
= TREE_TYPE (decl
);
6196 gcc_assert (VAR_P (decl
)
6197 || TREE_CODE (decl
) == RESULT_DECL
);
6198 gcc_assert (!TREE_STATIC (decl
));
6200 if (DECL_SIZE (decl
) == NULL_TREE
)
6202 /* If we used it already as memory, it must stay in memory. */
6203 DECL_INITIAL (decl
) = NULL_TREE
;
6204 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6208 if (type
== error_mark_node
)
6211 /* Compute and store the initial value. */
6212 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6213 if (TREE_USED (type
))
6214 DECL_READ_P (decl
) = 1;
6216 /* Generate a cleanup, if necessary. */
6217 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6219 /* Perform the initialization. */
6222 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6223 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6224 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6226 /* Stick simple initializers in DECL_INITIAL so that
6227 -Wno-init-self works (c++/34772). */
6228 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6229 DECL_INITIAL (decl
) = rinit
;
6231 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6235 warning_at (DECL_SOURCE_LOCATION (decl
),
6237 "reference %qD is initialized with itself", decl
);
6242 int saved_stmts_are_full_exprs_p
;
6244 /* If we're only initializing a single object, guard the
6245 destructors of any temporaries used in its initializer with
6246 its destructor. This isn't right for arrays because each
6247 element initialization is a full-expression. */
6248 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6249 wrap_temporary_cleanups (init
, cleanup
);
6251 gcc_assert (building_stmt_list_p ());
6252 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6253 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6254 finish_expr_stmt (init
);
6255 current_stmt_tree ()->stmts_are_full_exprs_p
=
6256 saved_stmts_are_full_exprs_p
;
6260 /* Set this to 0 so we can tell whether an aggregate which was
6261 initialized was ever used. Don't do this if it has a
6262 destructor, so we don't complain about the 'resource
6263 allocation is initialization' idiom. Now set
6264 attribute((unused)) on types so decls of that type will be
6265 marked used. (see TREE_USED, above.) */
6266 if (TYPE_NEEDS_CONSTRUCTING (type
)
6268 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6269 && DECL_NAME (decl
))
6270 TREE_USED (decl
) = 0;
6271 else if (already_used
)
6272 TREE_USED (decl
) = 1;
6275 finish_decl_cleanup (decl
, cleanup
);
6278 /* DECL is a VAR_DECL for a compiler-generated variable with static
6279 storage duration (like a virtual table) whose initializer is a
6280 compile-time constant. Initialize the variable and provide it to the
6284 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6287 gcc_assert (DECL_ARTIFICIAL (decl
));
6288 init
= build_constructor (TREE_TYPE (decl
), v
);
6289 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6290 DECL_INITIAL (decl
) = init
;
6291 DECL_INITIALIZED_P (decl
) = 1;
6292 determine_visibility (decl
);
6293 layout_var_decl (decl
);
6294 maybe_commonize_var (decl
);
6295 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6298 /* INIT is the initializer for a variable, as represented by the
6299 parser. Returns true iff INIT is type-dependent. */
6302 type_dependent_init_p (tree init
)
6304 if (TREE_CODE (init
) == TREE_LIST
)
6305 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6306 return any_type_dependent_elements_p (init
);
6307 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6308 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6310 vec
<constructor_elt
, va_gc
> *elts
;
6314 elts
= CONSTRUCTOR_ELTS (init
);
6315 nelts
= vec_safe_length (elts
);
6316 for (i
= 0; i
< nelts
; ++i
)
6317 if (type_dependent_init_p ((*elts
)[i
].value
))
6321 /* It must be a simple expression, e.g., int i = 3; */
6322 return type_dependent_expression_p (init
);
6327 /* INIT is the initializer for a variable, as represented by the
6328 parser. Returns true iff INIT is value-dependent. */
6331 value_dependent_init_p (tree init
)
6333 if (TREE_CODE (init
) == TREE_LIST
)
6334 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6335 return any_value_dependent_elements_p (init
);
6336 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6337 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6339 vec
<constructor_elt
, va_gc
> *elts
;
6343 elts
= CONSTRUCTOR_ELTS (init
);
6344 nelts
= vec_safe_length (elts
);
6345 for (i
= 0; i
< nelts
; ++i
)
6346 if (value_dependent_init_p ((*elts
)[i
].value
))
6350 /* It must be a simple expression, e.g., int i = 3; */
6351 return value_dependent_expression_p (init
);
6356 /* Finish processing of a declaration;
6357 install its line number and initial value.
6358 If the length of an array type is not known before,
6359 it must be determined now, from the initial value, or it is an error.
6361 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6362 true, then INIT is an integral constant expression.
6364 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6365 if the (init) syntax was used. */
6368 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6369 tree asmspec_tree
, int flags
)
6372 vec
<tree
, va_gc
> *cleanups
= NULL
;
6373 const char *asmspec
= NULL
;
6374 int was_readonly
= 0;
6375 bool var_definition_p
= false;
6378 if (decl
== error_mark_node
)
6383 error ("assignment (not initialization) in declaration");
6387 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6388 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6389 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6391 type
= TREE_TYPE (decl
);
6392 if (type
== error_mark_node
)
6395 /* If a name was specified, get the string. */
6396 if (at_namespace_scope_p ())
6397 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6398 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6399 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6401 if (current_class_type
6402 && CP_DECL_CONTEXT (decl
) == current_class_type
6403 && TYPE_BEING_DEFINED (current_class_type
)
6404 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6405 && (DECL_INITIAL (decl
) || init
))
6406 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6408 if (TREE_CODE (decl
) != FUNCTION_DECL
6409 && (auto_node
= type_uses_auto (type
)))
6412 if (init
== NULL_TREE
)
6414 if (DECL_LANG_SPECIFIC (decl
)
6415 && DECL_TEMPLATE_INSTANTIATION (decl
)
6416 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6418 /* init is null because we're deferring instantiating the
6419 initializer until we need it. Well, we need it now. */
6420 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6424 error ("declaration of %q#D has no initializer", decl
);
6425 TREE_TYPE (decl
) = error_mark_node
;
6429 if (TREE_CODE (d_init
) == TREE_LIST
)
6430 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6431 tf_warning_or_error
);
6432 d_init
= resolve_nondeduced_context (d_init
);
6433 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6435 if (type
== error_mark_node
)
6437 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6440 if (!ensure_literal_type_for_constexpr_object (decl
))
6441 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6444 && DECL_CLASS_SCOPE_P (decl
)
6445 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6446 check_static_variable_definition (decl
, type
);
6448 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6451 if (init
== ridpointers
[(int)RID_DELETE
])
6453 /* FIXME check this is 1st decl. */
6454 DECL_DELETED_FN (decl
) = 1;
6455 DECL_DECLARED_INLINE_P (decl
) = 1;
6456 DECL_INITIAL (decl
) = error_mark_node
;
6457 FOR_EACH_CLONE (clone
, decl
)
6459 DECL_DELETED_FN (clone
) = 1;
6460 DECL_DECLARED_INLINE_P (clone
) = 1;
6461 DECL_INITIAL (clone
) = error_mark_node
;
6465 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6467 if (defaultable_fn_check (decl
))
6468 DECL_DEFAULTED_FN (decl
) = 1;
6470 DECL_INITIAL (decl
) = NULL_TREE
;
6474 if (init
&& VAR_P (decl
))
6476 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6477 /* If DECL is a reference, then we want to know whether init is a
6478 reference constant; init_const_expr_p as passed tells us whether
6479 it's an rvalue constant. */
6480 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6481 init_const_expr_p
= potential_constant_expression (init
);
6482 if (init_const_expr_p
)
6484 /* Set these flags now for templates. We'll update the flags in
6485 store_init_value for instantiations. */
6486 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6487 if (decl_maybe_constant_var_p (decl
))
6488 TREE_CONSTANT (decl
) = 1;
6492 if (processing_template_decl
)
6494 bool type_dependent_p
;
6496 /* Add this declaration to the statement-tree. */
6497 if (at_function_scope_p ())
6498 add_decl_expr (decl
);
6500 type_dependent_p
= dependent_type_p (type
);
6502 if (check_for_bare_parameter_packs (init
))
6505 DECL_INITIAL (decl
) = NULL_TREE
;
6508 /* Generally, initializers in templates are expanded when the
6509 template is instantiated. But, if DECL is a variable constant
6510 then it can be used in future constant expressions, so its value
6511 must be available. */
6513 if (!VAR_P (decl
) || dependent_type_p (type
))
6514 /* We can't do anything if the decl has dependent type. */;
6516 && init_const_expr_p
6517 && !type_dependent_p
6518 && TREE_CODE (type
) != REFERENCE_TYPE
6519 && decl_maybe_constant_var_p (decl
)
6520 && !type_dependent_init_p (init
)
6521 && !value_dependent_init_p (init
))
6523 /* This variable seems to be a non-dependent constant, so process
6524 its initializer. If check_initializer returns non-null the
6525 initialization wasn't constant after all. */
6527 cleanups
= make_tree_vector ();
6528 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6529 if (init_code
== NULL_TREE
)
6531 release_tree_vector (cleanups
);
6533 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6535 /* Deduce array size even if the initializer is dependent. */
6536 maybe_deduce_size_from_array_init (decl
, init
);
6537 /* And complain about multiple initializers. */
6538 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6539 && !MAYBE_CLASS_TYPE_P (type
))
6540 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6541 tf_warning_or_error
);
6545 DECL_INITIAL (decl
) = init
;
6549 /* Just store non-static data member initializers for later. */
6550 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6551 DECL_INITIAL (decl
) = init
;
6553 /* Take care of TYPE_DECLs up front. */
6554 if (TREE_CODE (decl
) == TYPE_DECL
)
6556 if (type
!= error_mark_node
6557 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6559 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6560 warning (0, "shadowing previous type declaration of %q#D", decl
);
6561 set_identifier_type_value (DECL_NAME (decl
), decl
);
6564 /* If we have installed this as the canonical typedef for this
6565 type, and that type has not been defined yet, delay emitting
6566 the debug information for it, as we will emit it later. */
6567 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6568 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6569 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6571 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6576 /* A reference will be modified here, as it is initialized. */
6577 if (! DECL_EXTERNAL (decl
)
6578 && TREE_READONLY (decl
)
6579 && TREE_CODE (type
) == REFERENCE_TYPE
)
6582 TREE_READONLY (decl
) = 0;
6587 /* If this is a local variable that will need a mangled name,
6588 register it now. We must do this before processing the
6589 initializer for the variable, since the initialization might
6590 require a guard variable, and since the mangled name of the
6591 guard variable will depend on the mangled name of this
6593 if (DECL_FUNCTION_SCOPE_P (decl
)
6594 && TREE_STATIC (decl
)
6595 && !DECL_ARTIFICIAL (decl
))
6597 push_local_name (decl
);
6598 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6599 || DECL_DESTRUCTOR_P (current_function_decl
))
6600 /* Normally local_decls is populated during GIMPLE lowering,
6601 but [cd]tors are never actually compiled directly. We need
6602 to put statics on the list so we can deal with the label
6603 address extension. FIXME. */
6604 add_local_decl (cfun
, decl
);
6607 /* Convert the initializer to the type of DECL, if we have not
6608 already initialized DECL. */
6609 if (!DECL_INITIALIZED_P (decl
)
6610 /* If !DECL_EXTERNAL then DECL is being defined. In the
6611 case of a static data member initialized inside the
6612 class-specifier, there can be an initializer even if DECL
6613 is *not* defined. */
6614 && (!DECL_EXTERNAL (decl
) || init
))
6616 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6619 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6620 /* Allow libjava/prims.cc define primitive classes. */
6621 if (init
!= NULL_TREE
6622 || jclass
== NULL_TREE
6623 || TREE_CODE (jclass
) != TYPE_DECL
6624 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6625 || !same_type_ignoring_top_level_qualifiers_p
6626 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6627 error ("Java object %qD not allocated with %<new%>", decl
);
6630 cleanups
= make_tree_vector ();
6631 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6637 The memory occupied by any object of static storage
6638 duration is zero-initialized at program startup before
6639 any other initialization takes place.
6641 We cannot create an appropriate initializer until after
6642 the type of DECL is finalized. If DECL_INITIAL is set,
6643 then the DECL is statically initialized, and any
6644 necessary zero-initialization has already been performed. */
6645 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6646 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6647 /*nelts=*/NULL_TREE
,
6648 /*static_storage_p=*/true);
6649 /* Remember that the initialization for this variable has
6651 DECL_INITIALIZED_P (decl
) = 1;
6652 /* This declaration is the definition of this variable,
6653 unless we are initializing a static data member within
6654 the class specifier. */
6655 if (!DECL_EXTERNAL (decl
))
6656 var_definition_p
= true;
6658 /* If the variable has an array type, lay out the type, even if
6659 there is no initializer. It is valid to index through the
6660 array, and we must get TYPE_ALIGN set correctly on the array
6662 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6665 if (TREE_STATIC (decl
)
6666 && !at_function_scope_p ()
6667 && current_function_decl
== NULL
)
6668 /* So decl is a global variable or a static member of a
6669 non local class. Record the types it uses
6670 so that we can decide later to emit debug info for them. */
6671 record_types_used_by_current_var_decl (decl
);
6673 else if (TREE_CODE (decl
) == FIELD_DECL
6674 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6675 error ("non-static data member %qD has Java class type", decl
);
6677 /* Add this declaration to the statement-tree. This needs to happen
6678 after the call to check_initializer so that the DECL_EXPR for a
6679 reference temp is added before the DECL_EXPR for the reference itself. */
6680 if (DECL_FUNCTION_SCOPE_P (decl
))
6682 /* If we're building a variable sized type, and we might be
6683 reachable other than via the top of the current binding
6684 level, then create a new BIND_EXPR so that we deallocate
6685 the object at the right time. */
6688 && !TREE_CONSTANT (DECL_SIZE (decl
))
6689 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6692 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6693 TREE_SIDE_EFFECTS (bind
) = 1;
6695 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6697 add_decl_expr (decl
);
6700 /* Let the middle end know about variables and functions -- but not
6701 static data members in uninstantiated class templates. */
6702 if (VAR_OR_FUNCTION_DECL_P (decl
))
6706 layout_var_decl (decl
);
6707 maybe_commonize_var (decl
);
6710 /* This needs to happen after the linkage is set. */
6711 determine_visibility (decl
);
6713 if (var_definition_p
&& TREE_STATIC (decl
))
6715 /* If a TREE_READONLY variable needs initialization
6716 at runtime, it is no longer readonly and we need to
6717 avoid MEM_READONLY_P being set on RTL created for it. */
6720 if (TREE_READONLY (decl
))
6721 TREE_READONLY (decl
) = 0;
6724 else if (was_readonly
)
6725 TREE_READONLY (decl
) = 1;
6727 /* Likewise if it needs destruction. */
6728 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6729 TREE_READONLY (decl
) = 0;
6732 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6734 /* Check for abstractness of the type. Notice that there is no
6735 need to strip array types here since the check for those types
6736 is already done within create_array_type_for_decl. */
6737 abstract_virtuals_error (decl
, type
);
6739 if (TREE_TYPE (decl
) == error_mark_node
)
6740 /* No initialization required. */
6742 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6746 if (init
== ridpointers
[(int)RID_DEFAULT
])
6748 /* An out-of-class default definition is defined at
6749 the point where it is explicitly defaulted. */
6750 if (DECL_DELETED_FN (decl
))
6751 maybe_explain_implicit_delete (decl
);
6752 else if (DECL_INITIAL (decl
) == error_mark_node
)
6753 synthesize_method (decl
);
6756 error ("function %q#D is initialized like a variable", decl
);
6758 /* else no initialization required. */
6760 else if (DECL_EXTERNAL (decl
)
6761 && ! (DECL_LANG_SPECIFIC (decl
)
6762 && DECL_NOT_REALLY_EXTERN (decl
)))
6765 DECL_INITIAL (decl
) = init
;
6767 /* A variable definition. */
6768 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6769 /* Initialize the local variable. */
6770 initialize_local_var (decl
, init
);
6772 /* If a variable is defined, and then a subsequent
6773 definition with external linkage is encountered, we will
6774 get here twice for the same variable. We want to avoid
6775 calling expand_static_init more than once. For variables
6776 that are not static data members, we can call
6777 expand_static_init only when we actually process the
6778 initializer. It is not legal to redeclare a static data
6779 member, so this issue does not arise in that case. */
6780 else if (var_definition_p
&& TREE_STATIC (decl
))
6781 expand_static_init (decl
, init
);
6784 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6785 reference, insert it in the statement-tree now. */
6789 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6790 push_cleanup (decl
, t
, false);
6791 release_tree_vector (cleanups
);
6795 TREE_READONLY (decl
) = 1;
6797 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6800 /* Returns a declaration for a VAR_DECL as if:
6802 extern "C" TYPE NAME;
6804 had been seen. Used to create compiler-generated global
6808 declare_global_var (tree name
, tree type
)
6812 push_to_top_level ();
6813 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6814 TREE_PUBLIC (decl
) = 1;
6815 DECL_EXTERNAL (decl
) = 1;
6816 DECL_ARTIFICIAL (decl
) = 1;
6817 /* If the user has explicitly declared this variable (perhaps
6818 because the code we are compiling is part of a low-level runtime
6819 library), then it is possible that our declaration will be merged
6820 with theirs by pushdecl. */
6821 decl
= pushdecl (decl
);
6822 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6823 pop_from_top_level ();
6828 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6829 if "__cxa_atexit" is not being used) corresponding to the function
6830 to be called when the program exits. */
6833 get_atexit_fn_ptr_type (void)
6837 if (!atexit_fn_ptr_type_node
)
6840 if (flag_use_cxa_atexit
6841 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6842 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6843 arg_type
= ptr_type_node
;
6845 /* The parameter to "atexit" is "void (*)(void)". */
6846 arg_type
= NULL_TREE
;
6848 fn_type
= build_function_type_list (void_type_node
,
6849 arg_type
, NULL_TREE
);
6850 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6853 return atexit_fn_ptr_type_node
;
6856 /* Returns a pointer to the `atexit' function. Note that if
6857 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6858 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6861 get_atexit_node (void)
6867 bool use_aeabi_atexit
;
6872 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6874 /* The declaration for `__cxa_atexit' is:
6876 int __cxa_atexit (void (*)(void *), void *, void *)
6878 We build up the argument types and then the function type
6880 tree argtype0
, argtype1
, argtype2
;
6882 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6883 /* First, build the pointer-to-function type for the first
6885 fn_ptr_type
= get_atexit_fn_ptr_type ();
6886 /* Then, build the rest of the argument types. */
6887 argtype2
= ptr_type_node
;
6888 if (use_aeabi_atexit
)
6890 argtype1
= fn_ptr_type
;
6891 argtype0
= ptr_type_node
;
6895 argtype1
= ptr_type_node
;
6896 argtype0
= fn_ptr_type
;
6898 /* And the final __cxa_atexit type. */
6899 fn_type
= build_function_type_list (integer_type_node
,
6900 argtype0
, argtype1
, argtype2
,
6902 if (use_aeabi_atexit
)
6903 name
= "__aeabi_atexit";
6905 name
= "__cxa_atexit";
6909 /* The declaration for `atexit' is:
6911 int atexit (void (*)());
6913 We build up the argument types and then the function type
6915 fn_ptr_type
= get_atexit_fn_ptr_type ();
6916 /* Build the final atexit type. */
6917 fn_type
= build_function_type_list (integer_type_node
,
6918 fn_ptr_type
, NULL_TREE
);
6922 /* Now, build the function declaration. */
6923 push_lang_context (lang_name_c
);
6924 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6925 mark_used (atexit_fndecl
);
6926 pop_lang_context ();
6927 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6932 /* Like get_atexit_node, but for thread-local cleanups. */
6935 get_thread_atexit_node (void)
6937 /* The declaration for `__cxa_thread_atexit' is:
6939 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6940 tree fn_type
= build_function_type_list (integer_type_node
,
6941 get_atexit_fn_ptr_type (),
6942 ptr_type_node
, ptr_type_node
,
6945 /* Now, build the function declaration. */
6946 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6947 ECF_LEAF
| ECF_NOTHROW
);
6948 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6951 /* Returns the __dso_handle VAR_DECL. */
6954 get_dso_handle_node (void)
6956 if (dso_handle_node
)
6957 return dso_handle_node
;
6959 /* Declare the variable. */
6960 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6963 #ifdef HAVE_GAS_HIDDEN
6964 if (dso_handle_node
!= error_mark_node
)
6966 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6967 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6971 return dso_handle_node
;
6974 /* Begin a new function with internal linkage whose job will be simply
6975 to destroy some particular variable. */
6977 static GTY(()) int start_cleanup_cnt
;
6980 start_cleanup_fn (void)
6985 bool use_cxa_atexit
= flag_use_cxa_atexit
6986 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6988 push_to_top_level ();
6990 /* No need to mangle this. */
6991 push_lang_context (lang_name_c
);
6993 /* Build the name of the function. */
6994 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6995 /* Build the function declaration. */
6996 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6997 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6998 /* It's a function with internal linkage, generated by the
7000 TREE_PUBLIC (fndecl
) = 0;
7001 DECL_ARTIFICIAL (fndecl
) = 1;
7002 /* Make the function `inline' so that it is only emitted if it is
7003 actually needed. It is unlikely that it will be inlined, since
7004 it is only called via a function pointer, but we avoid unnecessary
7005 emissions this way. */
7006 DECL_DECLARED_INLINE_P (fndecl
) = 1;
7007 DECL_INTERFACE_KNOWN (fndecl
) = 1;
7008 /* Build the parameter. */
7013 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
7014 DECL_CONTEXT (parmdecl
) = fndecl
;
7015 TREE_USED (parmdecl
) = 1;
7016 DECL_READ_P (parmdecl
) = 1;
7017 DECL_ARGUMENTS (fndecl
) = parmdecl
;
7021 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
7023 pop_lang_context ();
7025 return current_function_decl
;
7028 /* Finish the cleanup function begun by start_cleanup_fn. */
7031 end_cleanup_fn (void)
7033 expand_or_defer_fn (finish_function (0));
7035 pop_from_top_level ();
7038 /* Generate code to handle the destruction of DECL, an object with
7039 static storage duration. */
7042 register_dtor_fn (tree decl
)
7049 bool ob_parm
, dso_parm
, use_dtor
;
7050 tree arg0
, arg1
, arg2
;
7053 type
= TREE_TYPE (decl
);
7054 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7057 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7058 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7059 destructor to "__cxa_atexit"; we don't have to build a temporary
7060 function to do the cleanup. */
7061 dso_parm
= (flag_use_cxa_atexit
7062 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7063 ob_parm
= (CP_DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7064 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7069 /* Find the destructor. */
7070 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7071 gcc_assert (idx
>= 0);
7072 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7073 /* Make sure it is accessible. */
7074 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7075 tf_warning_or_error
);
7079 /* Call build_cleanup before we enter the anonymous function so
7080 that any access checks will be done relative to the current
7081 scope, rather than the scope of the anonymous function. */
7082 build_cleanup (decl
);
7084 /* Now start the function. */
7085 cleanup
= start_cleanup_fn ();
7087 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7088 to the original function, rather than the anonymous one. That
7089 will make the back end think that nested functions are in use,
7090 which causes confusion. */
7091 push_deferring_access_checks (dk_no_check
);
7092 fcall
= build_cleanup (decl
);
7093 pop_deferring_access_checks ();
7095 /* Create the body of the anonymous function. */
7096 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7097 finish_expr_stmt (fcall
);
7098 finish_compound_stmt (compound_stmt
);
7102 /* Call atexit with the cleanup function. */
7103 mark_used (cleanup
);
7104 cleanup
= build_address (cleanup
);
7106 if (CP_DECL_THREAD_LOCAL_P (decl
))
7107 atex_node
= get_thread_atexit_node ();
7109 atex_node
= get_atexit_node ();
7113 /* We must convert CLEANUP to the type that "__cxa_atexit"
7115 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7116 /* "__cxa_atexit" will pass the address of DECL to the
7117 cleanup function. */
7119 addr
= build_address (decl
);
7120 /* The declared type of the parameter to "__cxa_atexit" is
7121 "void *". For plain "T*", we could just let the
7122 machinery in cp_build_function_call convert it -- but if the
7123 type is "cv-qualified T *", then we need to convert it
7124 before passing it in, to avoid spurious errors. */
7125 addr
= build_nop (ptr_type_node
, addr
);
7128 /* Since the cleanup functions we build ignore the address
7129 they're given, there's no reason to pass the actual address
7130 in, and, in general, it's cheaper to pass NULL than any
7132 addr
= null_pointer_node
;
7135 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7136 tf_warning_or_error
);
7138 /* Just pass NULL to the dso handle parm if we don't actually
7139 have a DSO handle on this target. */
7140 arg2
= null_pointer_node
;
7146 if (!CP_DECL_THREAD_LOCAL_P (decl
)
7147 && targetm
.cxx
.use_aeabi_atexit ())
7163 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7164 arg0
, arg1
, arg2
, NULL_TREE
);
7167 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7168 is its initializer. Generate code to handle the construction
7169 and destruction of DECL. */
7172 expand_static_init (tree decl
, tree init
)
7174 gcc_assert (VAR_P (decl
));
7175 gcc_assert (TREE_STATIC (decl
));
7177 /* Some variables require no dynamic initialization. */
7178 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7180 /* Make sure the destructor is callable. */
7181 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7186 if (CP_DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7187 && !DECL_FUNCTION_SCOPE_P (decl
))
7190 error ("non-local variable %qD declared %<__thread%> "
7191 "needs dynamic initialization", decl
);
7193 error ("non-local variable %qD declared %<__thread%> "
7194 "has a non-trivial destructor", decl
);
7195 static bool informed
;
7198 inform (DECL_SOURCE_LOCATION (decl
),
7199 "C++11 %<thread_local%> allows dynamic initialization "
7206 if (DECL_FUNCTION_SCOPE_P (decl
))
7208 /* Emit code to perform this initialization but once. */
7209 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7210 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7211 tree guard
, guard_addr
;
7213 /* We don't need thread-safety code for thread-local vars. */
7214 bool thread_guard
= (flag_threadsafe_statics
7215 && !CP_DECL_THREAD_LOCAL_P (decl
));
7217 /* Emit code to perform this initialization but once. This code
7220 static <type> guard;
7221 if (!__atomic_load (guard.first_byte)) {
7222 if (__cxa_guard_acquire (&guard)) {
7225 // Do initialization.
7226 flag = true; __cxa_guard_release (&guard);
7227 // Register variable for destruction at end of program.
7229 if (!flag) __cxa_guard_abort (&guard);
7233 Note that the `flag' variable is only set to 1 *after* the
7234 initialization is complete. This ensures that an exception,
7235 thrown during the construction, will cause the variable to
7236 reinitialized when we pass through this code again, as per:
7240 If the initialization exits by throwing an exception, the
7241 initialization is not complete, so it will be tried again
7242 the next time control enters the declaration.
7244 This process should be thread-safe, too; multiple threads
7245 should not be able to initialize the variable more than
7248 /* Create the guard variable. */
7249 guard
= get_guard (decl
);
7251 /* Begin the conditional initialization. */
7252 if_stmt
= begin_if_stmt ();
7254 finish_if_stmt_cond (get_guard_cond (guard
, thread_guard
), if_stmt
);
7255 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7259 tree vfntype
= NULL_TREE
;
7260 tree acquire_name
, release_name
, abort_name
;
7261 tree acquire_fn
, release_fn
, abort_fn
;
7262 guard_addr
= build_address (guard
);
7264 acquire_name
= get_identifier ("__cxa_guard_acquire");
7265 release_name
= get_identifier ("__cxa_guard_release");
7266 abort_name
= get_identifier ("__cxa_guard_abort");
7267 acquire_fn
= identifier_global_value (acquire_name
);
7268 release_fn
= identifier_global_value (release_name
);
7269 abort_fn
= identifier_global_value (abort_name
);
7271 acquire_fn
= push_library_fn
7272 (acquire_name
, build_function_type_list (integer_type_node
,
7273 TREE_TYPE (guard_addr
),
7275 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7276 if (!release_fn
|| !abort_fn
)
7277 vfntype
= build_function_type_list (void_type_node
,
7278 TREE_TYPE (guard_addr
),
7281 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7282 ECF_NOTHROW
| ECF_LEAF
);
7284 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7285 ECF_NOTHROW
| ECF_LEAF
);
7287 inner_if_stmt
= begin_if_stmt ();
7288 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7291 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7292 begin
= get_target_expr (boolean_false_node
);
7293 flag
= TARGET_EXPR_SLOT (begin
);
7295 TARGET_EXPR_CLEANUP (begin
)
7296 = build3 (COND_EXPR
, void_type_node
, flag
,
7298 build_call_n (abort_fn
, 1, guard_addr
));
7299 CLEANUP_EH_ONLY (begin
) = 1;
7301 /* Do the initialization itself. */
7302 init
= add_stmt_to_compound (begin
, init
);
7303 init
= add_stmt_to_compound
7304 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7305 init
= add_stmt_to_compound
7306 (init
, build_call_n (release_fn
, 1, guard_addr
));
7309 init
= add_stmt_to_compound (init
, set_guard (guard
));
7311 /* Use atexit to register a function for destroying this static
7313 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7315 finish_expr_stmt (init
);
7319 finish_compound_stmt (inner_then_clause
);
7320 finish_then_clause (inner_if_stmt
);
7321 finish_if_stmt (inner_if_stmt
);
7324 finish_compound_stmt (then_clause
);
7325 finish_then_clause (if_stmt
);
7326 finish_if_stmt (if_stmt
);
7328 else if (CP_DECL_THREAD_LOCAL_P (decl
))
7329 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7331 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7335 /* Make TYPE a complete type based on INITIAL_VALUE.
7336 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7337 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7338 3 if the initializer list is empty (in pedantic mode). */
7341 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7344 tree type
, elt_type
;
7346 /* Don't get confused by a CONSTRUCTOR for some other type. */
7347 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7348 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7353 unsigned HOST_WIDE_INT i
;
7356 /* An array of character type can be initialized from a
7357 brace-enclosed string constant.
7359 FIXME: this code is duplicated from reshape_init. Probably
7360 we should just call reshape_init here? */
7361 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7362 && TREE_CODE (initial_value
) == CONSTRUCTOR
7363 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7365 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7366 tree value
= (*v
)[0].value
;
7368 if (TREE_CODE (value
) == STRING_CST
7369 && v
->length () == 1)
7370 initial_value
= value
;
7373 /* If any of the elements are parameter packs, we can't actually
7374 complete this type now because the array size is dependent. */
7375 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7377 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7380 if (PACK_EXPANSION_P (value
))
7386 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7388 /* We can create the array before the element type is complete, which
7389 means that we didn't have these two bits set in the original type
7390 either. In completing the type, we are expected to propagate these
7391 bits. See also complete_type which does the same thing for arrays
7394 if (TYPE_DOMAIN (type
))
7396 elt_type
= TREE_TYPE (type
);
7397 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7398 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7399 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7405 /* As above, but either give an error or reject zero-size arrays, depending
7409 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7410 bool do_default
, tsubst_flags_t complain
)
7413 bool sfinae
= !(complain
& tf_error
);
7414 /* In SFINAE context we can't be lenient about zero-size arrays. */
7417 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7423 /* Not an error. */;
7424 else if (failure
== 1)
7425 error ("initializer fails to determine size of %qT", *ptype
);
7426 else if (failure
== 2)
7429 error ("array size missing in %qT", *ptype
);
7431 else if (failure
== 3)
7432 error ("zero-size array %qT", *ptype
);
7433 *ptype
= error_mark_node
;
7438 /* Return zero if something is declared to be a member of type
7439 CTYPE when in the context of CUR_TYPE. STRING is the error
7440 message to print in that case. Otherwise, quietly return 1. */
7443 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7445 if (ctype
&& ctype
!= cur_type
)
7447 if (flags
== DTOR_FLAG
)
7448 error ("destructor for alien class %qT cannot be a member", ctype
);
7450 error ("constructor for alien class %qT cannot be a member", ctype
);
7456 /* Subroutine of `grokdeclarator'. */
7458 /* Generate errors possibly applicable for a given set of specifiers.
7459 This is for ARM $7.1.2. */
7462 bad_specifiers (tree object
,
7463 enum bad_spec_place type
,
7474 error ("%qD declared as a %<virtual%> variable", object
);
7476 error ("%qD declared as an %<inline%> variable", object
);
7478 error ("%<const%> and %<volatile%> function specifiers on "
7479 "%qD invalid in variable declaration", object
);
7483 error ("%qD declared as a %<virtual%> parameter", object
);
7485 error ("%qD declared as an %<inline%> parameter", object
);
7487 error ("%<const%> and %<volatile%> function specifiers on "
7488 "%qD invalid in parameter declaration", object
);
7492 error ("%qD declared as a %<virtual%> type", object
);
7494 error ("%qD declared as an %<inline%> type", object
);
7496 error ("%<const%> and %<volatile%> function specifiers on "
7497 "%qD invalid in type declaration", object
);
7501 error ("%qD declared as a %<virtual%> field", object
);
7503 error ("%qD declared as an %<inline%> field", object
);
7505 error ("%<const%> and %<volatile%> function specifiers on "
7506 "%qD invalid in field declaration", object
);
7512 error ("%q+D declared as a friend", object
);
7514 && (TREE_CODE (object
) == TYPE_DECL
7515 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7516 && !TYPE_REFFN_P (TREE_TYPE (object
))
7517 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7518 error ("%q+D declared with an exception specification", object
);
7521 /* DECL is a member function or static data member and is presently
7522 being defined. Check that the definition is taking place in a
7526 check_class_member_definition_namespace (tree decl
)
7528 /* These checks only apply to member functions and static data
7530 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7531 /* We check for problems with specializations in pt.c in
7532 check_specialization_namespace, where we can issue better
7534 if (processing_specialization
)
7536 /* There are no restrictions on the placement of
7537 explicit instantiations. */
7538 if (processing_explicit_instantiation
)
7542 A member function definition that appears outside of the
7543 class definition shall appear in a namespace scope enclosing
7544 the class definition.
7548 The definition for a static data member shall appear in a
7549 namespace scope enclosing the member's class definition. */
7550 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7551 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7552 decl
, DECL_CONTEXT (decl
));
7555 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7556 METHOD_TYPE for a non-static member function; QUALS are the
7557 cv-qualifiers that apply to the function. */
7560 build_this_parm (tree type
, cp_cv_quals quals
)
7565 cp_cv_quals this_quals
;
7567 if (CLASS_TYPE_P (type
))
7570 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7571 this_type
= build_pointer_type (this_type
);
7574 this_type
= type_of_this_parm (type
);
7575 /* The `this' parameter is implicitly `const'; it cannot be
7577 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7578 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7579 parm
= build_artificial_parm (this_identifier
, qual_type
);
7580 cp_apply_type_quals_to_decl (this_quals
, parm
);
7584 /* DECL is a static member function. Complain if it was declared
7585 with function-cv-quals. */
7588 check_static_quals (tree decl
, cp_cv_quals quals
)
7590 if (quals
!= TYPE_UNQUALIFIED
)
7591 error ("static member function %q#D declared with type qualifiers",
7595 /* Helper function. Replace the temporary this parameter injected
7596 during cp_finish_omp_declare_simd with the real this parameter. */
7599 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7601 tree this_parm
= (tree
) data
;
7602 if (TREE_CODE (*tp
) == PARM_DECL
7603 && DECL_NAME (*tp
) == this_identifier
7604 && *tp
!= this_parm
)
7606 else if (TYPE_P (*tp
))
7611 /* CTYPE is class type, or null if non-class.
7612 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7614 DECLARATOR is the function's name.
7615 PARMS is a chain of PARM_DECLs for the function.
7616 VIRTUALP is truthvalue of whether the function is virtual or not.
7617 FLAGS are to be passed through to `grokclassfn'.
7618 QUALS are qualifiers indicating whether the function is `const'
7620 RAISES is a list of exceptions that this function can raise.
7621 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7622 not look, and -1 if we should not call `grokclassfn' at all.
7624 SFK is the kind of special function (if any) for the new function.
7626 Returns `NULL_TREE' if something goes wrong, after issuing
7627 applicable error messages. */
7630 grokfndecl (tree ctype
,
7634 tree orig_declarator
,
7636 enum overload_flags flags
,
7638 cp_ref_qualifier rqual
,
7645 special_function_kind sfk
,
7650 location_t location
)
7653 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7657 type
= build_ref_qualified_type (type
, rqual
);
7659 type
= build_exception_variant (type
, raises
);
7661 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7663 /* If we have an explicit location, use it, otherwise use whatever
7664 build_lang_decl used (probably input_location). */
7665 if (location
!= UNKNOWN_LOCATION
)
7666 DECL_SOURCE_LOCATION (decl
) = location
;
7668 if (TREE_CODE (type
) == METHOD_TYPE
)
7671 parm
= build_this_parm (type
, quals
);
7672 DECL_CHAIN (parm
) = parms
;
7675 DECL_ARGUMENTS (decl
) = parms
;
7676 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7677 DECL_CONTEXT (t
) = decl
;
7678 /* Propagate volatile out from type to decl. */
7679 if (TYPE_VOLATILE (type
))
7680 TREE_THIS_VOLATILE (decl
) = 1;
7682 /* Setup decl according to sfk. */
7685 case sfk_constructor
:
7686 case sfk_copy_constructor
:
7687 case sfk_move_constructor
:
7688 DECL_CONSTRUCTOR_P (decl
) = 1;
7690 case sfk_destructor
:
7691 DECL_DESTRUCTOR_P (decl
) = 1;
7697 /* If pointers to member functions use the least significant bit to
7698 indicate whether a function is virtual, ensure a pointer
7699 to this function will have that bit clear. */
7700 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7701 && TREE_CODE (type
) == METHOD_TYPE
7702 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7703 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7706 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7710 ("defining explicit specialization %qD in friend declaration",
7714 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7715 tree args
= TREE_OPERAND (orig_declarator
, 1);
7717 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7719 /* Something like `template <class T> friend void f<T>()'. */
7720 error ("invalid use of template-id %qD in declaration "
7721 "of primary template",
7727 /* A friend declaration of the form friend void f<>(). Record
7728 the information in the TEMPLATE_ID_EXPR. */
7729 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7731 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7732 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7734 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7735 if (TREE_PURPOSE (t
)
7736 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7738 error ("default arguments are not allowed in declaration "
7739 "of friend template specialization %qD",
7746 error ("%<inline%> is not allowed in declaration of friend "
7747 "template specialization %qD",
7754 /* If this decl has namespace scope, set that up. */
7756 set_decl_namespace (decl
, in_namespace
, friendp
);
7758 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7760 /* `main' and builtins have implicit 'C' linkage. */
7761 if ((MAIN_NAME_P (declarator
)
7762 || (IDENTIFIER_LENGTH (declarator
) > 10
7763 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7764 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7765 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7766 || (targetcm
.cxx_implicit_extern_c
7767 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7768 && current_lang_name
== lang_name_cplusplus
7769 && ctype
== NULL_TREE
7770 && DECL_FILE_SCOPE_P (decl
))
7771 SET_DECL_LANGUAGE (decl
, lang_c
);
7773 /* Should probably propagate const out from type to decl I bet (mrs). */
7776 DECL_STATIC_FUNCTION_P (decl
) = 1;
7777 DECL_CONTEXT (decl
) = ctype
;
7781 DECL_DELETED_FN (decl
) = 1;
7785 DECL_CONTEXT (decl
) = ctype
;
7787 check_class_member_definition_namespace (decl
);
7790 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7792 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7793 error ("cannot declare %<::main%> to be a template");
7795 error ("cannot declare %<::main%> to be inline");
7797 error ("cannot declare %<::main%> to be constexpr");
7799 error ("cannot declare %<::main%> to be static");
7804 /* Members of anonymous types and local classes have no linkage; make
7805 them internal. If a typedef is made later, this will be changed. */
7806 if (ctype
&& (!TREE_PUBLIC (TYPE_MAIN_DECL (ctype
))
7807 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7810 if (publicp
&& cxx_dialect
== cxx98
)
7812 /* [basic.link]: A name with no linkage (notably, the name of a class
7813 or enumeration declared in a local scope) shall not be used to
7814 declare an entity with linkage.
7816 DR 757 relaxes this restriction for C++0x. */
7817 no_linkage_error (decl
);
7820 TREE_PUBLIC (decl
) = publicp
;
7823 DECL_INTERFACE_KNOWN (decl
) = 1;
7824 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7827 /* If the declaration was declared inline, mark it as such. */
7830 DECL_DECLARED_INLINE_P (decl
) = 1;
7832 DECL_COMDAT (decl
) = 1;
7835 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7837 DECL_EXTERNAL (decl
) = 1;
7838 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7843 ? G_("static member function %qD cannot have cv-qualifier")
7844 : G_("non-member function %qD cannot have cv-qualifier"),
7846 quals
= TYPE_UNQUALIFIED
;
7852 ? G_("static member function %qD cannot have ref-qualifier")
7853 : G_("non-member function %qD cannot have ref-qualifier"),
7855 rqual
= REF_QUAL_NONE
;
7859 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7860 && !grok_op_properties (decl
, /*complain=*/true))
7862 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7864 bool long_long_unsigned_p
;
7866 const char *suffix
= NULL
;
7867 /* [over.literal]/6: Literal operators shall not have C linkage. */
7868 if (DECL_LANGUAGE (decl
) == lang_c
)
7870 error ("literal operator with C linkage");
7874 if (DECL_NAMESPACE_SCOPE_P (decl
))
7876 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7879 error ("%qD has invalid argument list", decl
);
7883 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7884 if (long_long_unsigned_p
)
7886 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7887 warning (0, "integer suffix %<%s%>"
7888 " shadowed by implementation", suffix
);
7890 else if (long_double_p
)
7892 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7893 warning (0, "floating point suffix %<%s%>"
7894 " shadowed by implementation", suffix
);
7899 error ("%qD must be a non-member function", decl
);
7905 /* Make the init_value nonzero so pushdecl knows this is not
7906 tentative. error_mark_node is replaced later with the BLOCK. */
7907 DECL_INITIAL (decl
) = error_mark_node
;
7909 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7910 TREE_NOTHROW (decl
) = 1;
7912 if (flag_openmp
|| flag_cilkplus
)
7914 /* Adjust "omp declare simd" attributes. */
7915 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7919 for (attr
= ods
; attr
;
7920 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7922 if (TREE_CODE (type
) == METHOD_TYPE
)
7923 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7924 DECL_ARGUMENTS (decl
), NULL
);
7925 if (TREE_VALUE (attr
) != NULL_TREE
)
7927 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7928 cl
= c_omp_declare_simd_clauses_to_numbers
7929 (DECL_ARGUMENTS (decl
), cl
);
7931 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7933 TREE_VALUE (attr
) = NULL_TREE
;
7939 /* Caller will do the rest of this. */
7943 if (ctype
!= NULL_TREE
)
7944 grokclassfn (ctype
, decl
, flags
);
7947 if (cxx_dialect
>= cxx11
7948 && DECL_DESTRUCTOR_P (decl
)
7949 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7950 && !processing_template_decl
)
7951 deduce_noexcept_on_destructor (decl
);
7953 decl
= check_explicit_specialization (orig_declarator
, decl
,
7956 4 * (friendp
!= 0));
7957 if (decl
== error_mark_node
)
7960 if (DECL_STATIC_FUNCTION_P (decl
))
7961 check_static_quals (decl
, quals
);
7965 cplus_decl_attributes (&decl
, *attrlist
, 0);
7966 *attrlist
= NULL_TREE
;
7969 /* Check main's type after attributes have been applied. */
7970 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7972 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7975 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7977 error ("%<::main%> must return %<int%>");
7978 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7979 TREE_TYPE (decl
) = newtype
;
7982 check_main_parameter_types (decl
);
7985 if (ctype
!= NULL_TREE
7986 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7989 tree old_decl
= check_classfn (ctype
, decl
,
7990 (processing_template_decl
7991 > template_class_depth (ctype
))
7992 ? current_template_parms
7995 if (old_decl
== error_mark_node
)
8003 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
8004 /* Because grokfndecl is always supposed to return a
8005 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8006 here. We depend on our callers to figure out that its
8007 really a template that's being returned. */
8008 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
8010 if (DECL_STATIC_FUNCTION_P (old_decl
)
8011 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8013 /* Remove the `this' parm added by grokclassfn. */
8014 revert_static_member_fn (decl
);
8015 check_static_quals (decl
, quals
);
8017 if (DECL_ARTIFICIAL (old_decl
))
8019 error ("definition of implicitly-declared %qD", old_decl
);
8022 else if (DECL_DEFAULTED_FN (old_decl
))
8024 error ("definition of explicitly-defaulted %q+D", decl
);
8025 error ("%q+#D explicitly defaulted here", old_decl
);
8029 /* Since we've smashed OLD_DECL to its
8030 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8031 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8032 decl
= DECL_TEMPLATE_RESULT (decl
);
8034 /* Attempt to merge the declarations. This can fail, in
8035 the case of some invalid specialization declarations. */
8036 pushed_scope
= push_scope (ctype
);
8037 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8039 pop_scope (pushed_scope
);
8042 error ("no %q#D member function declared in class %qT",
8046 if (ok
== error_mark_node
)
8052 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8055 if (ctype
== NULL_TREE
|| check
)
8059 DECL_VIRTUAL_P (decl
) = 1;
8064 /* decl is a FUNCTION_DECL.
8065 specifiers are the parsed virt-specifiers.
8067 Set flags to reflect the virt-specifiers.
8072 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8074 if (decl
== NULL_TREE
)
8076 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8077 DECL_OVERRIDE_P (decl
) = 1;
8078 if (specifiers
& VIRT_SPEC_FINAL
)
8079 DECL_FINAL_P (decl
) = 1;
8083 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8084 the linkage that DECL will receive in the object file. */
8087 set_linkage_for_static_data_member (tree decl
)
8089 /* A static data member always has static storage duration and
8090 external linkage. Note that static data members are forbidden in
8091 local classes -- the only situation in which a class has
8092 non-external linkage. */
8093 TREE_PUBLIC (decl
) = 1;
8094 TREE_STATIC (decl
) = 1;
8095 /* For non-template classes, static data members are always put
8096 out in exactly those files where they are defined, just as
8097 with ordinary namespace-scope variables. */
8098 if (!processing_template_decl
)
8099 DECL_INTERFACE_KNOWN (decl
) = 1;
8102 /* Create a VAR_DECL named NAME with the indicated TYPE.
8104 If SCOPE is non-NULL, it is the class type or namespace containing
8105 the variable. If SCOPE is NULL, the variable should is created in
8106 the innermost enclosing scope. */
8109 grokvardecl (tree type
,
8111 tree orig_declarator
,
8112 const cp_decl_specifier_seq
*declspecs
,
8119 tree explicit_scope
;
8121 gcc_assert (!name
|| identifier_p (name
));
8123 /* Compute the scope in which to place the variable, but remember
8124 whether or not that scope was explicitly specified by the user. */
8125 explicit_scope
= scope
;
8128 /* An explicit "extern" specifier indicates a namespace-scope
8130 if (declspecs
->storage_class
== sc_extern
)
8131 scope
= current_decl_namespace ();
8132 else if (!at_function_scope_p ())
8133 scope
= current_scope ();
8137 && (/* If the variable is a namespace-scope variable declared in a
8138 template, we need DECL_LANG_SPECIFIC. */
8139 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8140 /* Similarly for namespace-scope variables with language linkage
8142 || (TREE_CODE (scope
) == NAMESPACE_DECL
8143 && current_lang_name
!= lang_name_cplusplus
)
8144 /* Similarly for static data members. */
8146 /* Similarly for explicit specializations. */
8148 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8149 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8151 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8153 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8154 set_decl_namespace (decl
, explicit_scope
, 0);
8156 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8158 if (declspecs
->storage_class
== sc_extern
)
8160 DECL_THIS_EXTERN (decl
) = 1;
8161 DECL_EXTERNAL (decl
) = !initialized
;
8164 if (DECL_CLASS_SCOPE_P (decl
))
8166 set_linkage_for_static_data_member (decl
);
8167 /* This function is only called with out-of-class definitions. */
8168 DECL_EXTERNAL (decl
) = 0;
8169 check_class_member_definition_namespace (decl
);
8171 /* At top level, either `static' or no s.c. makes a definition
8172 (perhaps tentative), and absence of `static' makes it public. */
8173 else if (toplevel_bindings_p ())
8175 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8176 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8177 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8179 /* Not at top level, only `static' makes a static definition. */
8182 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8183 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8186 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8188 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8190 CP_DECL_THREAD_LOCAL_P (decl
) = true;
8191 if (!processing_template_decl
)
8192 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8194 if (declspecs
->gnu_thread_keyword_p
)
8195 SET_DECL_GNU_TLS_P (decl
);
8198 /* If the type of the decl has no linkage, make sure that we'll
8199 notice that in mark_used. */
8200 if (cxx_dialect
> cxx98
8201 && decl_linkage (decl
) != lk_none
8202 && DECL_LANG_SPECIFIC (decl
) == NULL
8203 && !DECL_EXTERN_C_P (decl
)
8204 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8205 retrofit_lang_decl (decl
);
8207 if (TREE_PUBLIC (decl
))
8209 /* [basic.link]: A name with no linkage (notably, the name of a class
8210 or enumeration declared in a local scope) shall not be used to
8211 declare an entity with linkage.
8213 DR 757 relaxes this restriction for C++0x. */
8214 if (cxx_dialect
< cxx11
)
8215 no_linkage_error (decl
);
8218 DECL_INTERFACE_KNOWN (decl
) = 1;
8220 // Handle explicit specializations and instantiations of variable templates.
8221 if (orig_declarator
)
8222 decl
= check_explicit_specialization (orig_declarator
, decl
,
8225 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8228 /* Create and return a canonical pointer to member function type, for
8229 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8232 build_ptrmemfunc_type (tree type
)
8237 if (type
== error_mark_node
)
8240 /* Make sure that we always have the unqualified pointer-to-member
8242 if (cp_cv_quals quals
= cp_type_quals (type
))
8244 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8245 return cp_build_qualified_type (unqual
, quals
);
8248 /* If a canonical type already exists for this type, use it. We use
8249 this method instead of type_hash_canon, because it only does a
8250 simple equality check on the list of field members. */
8252 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8255 t
= make_node (RECORD_TYPE
);
8257 /* Let the front end know this is a pointer to member function. */
8258 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8260 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8263 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8265 DECL_CHAIN (field
) = fields
;
8268 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8270 /* Zap out the name so that the back end will give us the debugging
8271 information for this anonymous RECORD_TYPE. */
8272 TYPE_NAME (t
) = NULL_TREE
;
8274 /* Cache this pointer-to-member type so that we can find it again
8276 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8278 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8279 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8280 else if (TYPE_CANONICAL (type
) != type
)
8281 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8286 /* Create and return a pointer to data member type. */
8289 build_ptrmem_type (tree class_type
, tree member_type
)
8291 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8293 cp_cv_quals quals
= type_memfn_quals (member_type
);
8294 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8295 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8296 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8300 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8301 return build_offset_type (class_type
, member_type
);
8305 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8306 Check to see that the definition is valid. Issue appropriate error
8307 messages. Return 1 if the definition is particularly bad, or 0
8311 check_static_variable_definition (tree decl
, tree type
)
8313 /* Can't check yet if we don't know the type. */
8314 if (dependent_type_p (type
))
8316 /* If DECL is declared constexpr, we'll do the appropriate checks
8317 in check_initializer. */
8318 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8320 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8322 if (!COMPLETE_TYPE_P (type
))
8323 error ("in-class initialization of static data member %q#D of "
8324 "incomplete type", decl
);
8325 else if (literal_type_p (type
))
8326 permerror (input_location
,
8327 "%<constexpr%> needed for in-class initialization of "
8328 "static data member %q#D of non-integral type", decl
);
8330 error ("in-class initialization of static data member %q#D of "
8331 "non-literal type", decl
);
8335 /* Motion 10 at San Diego: If a static const integral data member is
8336 initialized with an integral constant expression, the initializer
8337 may appear either in the declaration (within the class), or in
8338 the definition, but not both. If it appears in the class, the
8339 member is a member constant. The file-scope definition is always
8341 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8343 error ("invalid in-class initialization of static data member "
8344 "of non-integral type %qT",
8348 else if (!CP_TYPE_CONST_P (type
))
8349 error ("ISO C++ forbids in-class initialization of non-const "
8350 "static member %qD",
8352 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8353 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8354 "%qD of non-integral type %qT", decl
, type
);
8359 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8360 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8361 expressions out into temporary variables so that walk_tree doesn't
8362 step into them (c++/15764). */
8365 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8367 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8368 tree expr
= *expr_p
;
8369 if (TREE_CODE (expr
) == SAVE_EXPR
)
8371 tree op
= TREE_OPERAND (expr
, 0);
8372 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8373 if (TREE_SIDE_EFFECTS (op
))
8374 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8377 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8382 /* Entry point for the above. */
8385 stabilize_vla_size (tree size
)
8387 hash_set
<tree
> pset
;
8388 /* Break out any function calls into temporary variables. */
8389 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8392 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8393 not inside of SAVE_EXPR and fold them. */
8396 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8398 tree expr
= *expr_p
;
8399 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8401 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8403 *(bool *)data
= true;
8404 if (SIZEOF_EXPR_TYPE_P (expr
))
8405 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8406 SIZEOF_EXPR
, false);
8407 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8408 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8411 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8413 if (expr
== error_mark_node
)
8414 expr
= size_one_node
;
8421 /* Given the SIZE (i.e., number of elements) in an array, compute an
8422 appropriate index type for the array. If non-NULL, NAME is the
8423 name of the thing being declared. */
8426 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8431 if (error_operand_p (size
))
8432 return error_mark_node
;
8434 if (!type_dependent_expression_p (size
))
8436 tree type
= TREE_TYPE (size
);
8438 mark_rvalue_use (size
);
8440 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8441 && TREE_SIDE_EFFECTS (size
))
8442 /* In C++98, we mark a non-constant array bound with a magic
8443 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8446 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8448 if (CLASS_TYPE_P (type
)
8449 && CLASSTYPE_LITERAL_P (type
))
8451 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8454 if (!(complain
& tf_error
))
8455 return error_mark_node
;
8457 error ("size of array %qD has non-integral type %qT",
8460 error ("size of array has non-integral type %qT", type
);
8461 size
= integer_one_node
;
8463 if (size
== error_mark_node
)
8464 return error_mark_node
;
8465 type
= TREE_TYPE (size
);
8468 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8469 size
= maybe_constant_value (size
);
8471 if (!TREE_CONSTANT (size
))
8475 if (error_operand_p (size
))
8476 return error_mark_node
;
8478 /* The array bound must be an integer type. */
8479 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8481 if (!(complain
& tf_error
))
8482 return error_mark_node
;
8484 error ("size of array %qD has non-integral type %qT", name
, type
);
8486 error ("size of array has non-integral type %qT", type
);
8487 size
= integer_one_node
;
8488 type
= TREE_TYPE (size
);
8492 /* A type is dependent if it is...an array type constructed from any
8493 dependent type or whose size is specified by a constant expression
8494 that is value-dependent. */
8495 /* We can only call value_dependent_expression_p on integral constant
8496 expressions; treat non-constant expressions as dependent, too. */
8497 if (processing_template_decl
8498 && (type_dependent_expression_p (size
)
8499 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8501 /* We cannot do any checking for a SIZE that isn't known to be
8502 constant. Just build the index type and mark that it requires
8503 structural equality checks. */
8504 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8505 size
, size_one_node
));
8506 TYPE_DEPENDENT_P (itype
) = 1;
8507 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8508 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8512 /* Normally, the array-bound will be a constant. */
8513 if (TREE_CODE (size
) == INTEGER_CST
)
8515 /* Check to see if the array bound overflowed. Make that an
8516 error, no matter how generous we're being. */
8517 constant_expression_error (size
);
8519 /* An array must have a positive number of elements. */
8520 if (tree_int_cst_lt (size
, integer_zero_node
))
8522 if (!(complain
& tf_error
))
8523 return error_mark_node
;
8525 error ("size of array %qD is negative", name
);
8527 error ("size of array is negative");
8528 size
= integer_one_node
;
8530 /* As an extension we allow zero-sized arrays. */
8531 else if (integer_zerop (size
))
8533 if (!(complain
& tf_error
))
8534 /* We must fail if performing argument deduction (as
8535 indicated by the state of complain), so that
8536 another substitution can be found. */
8537 return error_mark_node
;
8538 else if (in_system_header_at (input_location
))
8539 /* Allow them in system headers because glibc uses them. */;
8541 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8543 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8546 else if (TREE_CONSTANT (size
)
8547 /* We don't allow VLAs at non-function scopes, or during
8548 tentative template substitution. */
8549 || !at_function_scope_p ()
8550 || !(complain
& tf_error
))
8552 if (!(complain
& tf_error
))
8553 return error_mark_node
;
8554 /* `(int) &fn' is not a valid array bound. */
8556 error ("size of array %qD is not an integral constant-expression",
8559 error ("size of array is not an integral constant-expression");
8560 size
= integer_one_node
;
8562 else if (pedantic
&& warn_vla
!= 0)
8565 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8567 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8569 else if (warn_vla
> 0)
8573 "variable length array %qD is used", name
);
8576 "variable length array is used");
8579 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8580 /* A variable sized array. */
8581 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8584 HOST_WIDE_INT saved_processing_template_decl
;
8586 /* Compute the index of the largest element in the array. It is
8587 one less than the number of elements in the array. We save
8588 and restore PROCESSING_TEMPLATE_DECL so that computations in
8589 cp_build_binary_op will be appropriately folded. */
8590 saved_processing_template_decl
= processing_template_decl
;
8591 processing_template_decl
= 0;
8592 itype
= cp_build_binary_op (input_location
,
8594 cp_convert (ssizetype
, size
, complain
),
8595 cp_convert (ssizetype
, integer_one_node
,
8598 itype
= fold (itype
);
8599 processing_template_decl
= saved_processing_template_decl
;
8601 if (!TREE_CONSTANT (itype
))
8603 /* A variable sized array. */
8604 itype
= variable_size (itype
);
8606 if (TREE_CODE (itype
) != SAVE_EXPR
)
8608 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8609 they might survive till gimplification. */
8610 tree newitype
= itype
;
8612 cp_walk_tree_without_duplicates (&newitype
,
8613 fold_sizeof_expr_r
, &found
);
8615 itype
= variable_size (fold (newitype
));
8618 stabilize_vla_size (itype
);
8620 if (flag_sanitize
& SANITIZE_VLA
8621 && do_ubsan_in_current_function ())
8623 /* We have to add 1 -- in the ubsan routine we generate
8624 LE_EXPR rather than LT_EXPR. */
8625 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8626 build_one_cst (TREE_TYPE (itype
)));
8627 t
= ubsan_instrument_vla (input_location
, t
);
8628 finish_expr_stmt (t
);
8631 /* Make sure that there was no overflow when creating to a signed
8632 index type. (For example, on a 32-bit machine, an array with
8633 size 2^32 - 1 is too big.) */
8634 else if (TREE_CODE (itype
) == INTEGER_CST
8635 && TREE_OVERFLOW (itype
))
8637 if (!(complain
& tf_error
))
8638 return error_mark_node
;
8639 error ("overflow in array dimension");
8640 TREE_OVERFLOW (itype
) = 0;
8644 /* Create and return the appropriate index type. */
8645 itype
= build_index_type (itype
);
8647 /* If the index type were dependent, we would have returned early, so
8648 remember that it isn't. */
8649 TYPE_DEPENDENT_P (itype
) = 0;
8650 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8654 /* Returns the scope (if any) in which the entity declared by
8655 DECLARATOR will be located. If the entity was declared with an
8656 unqualified name, NULL_TREE is returned. */
8659 get_scope_of_declarator (const cp_declarator
*declarator
)
8661 while (declarator
&& declarator
->kind
!= cdk_id
)
8662 declarator
= declarator
->declarator
;
8664 /* If the declarator-id is a SCOPE_REF, the scope in which the
8665 declaration occurs is the first operand. */
8667 && declarator
->u
.id
.qualifying_scope
)
8668 return declarator
->u
.id
.qualifying_scope
;
8670 /* Otherwise, the declarator is not a qualified name; the entity will
8671 be declared in the current scope. */
8675 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8676 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8680 create_array_type_for_decl (tree name
, tree type
, tree size
)
8682 tree itype
= NULL_TREE
;
8684 /* If things have already gone awry, bail now. */
8685 if (type
== error_mark_node
|| size
== error_mark_node
)
8686 return error_mark_node
;
8688 /* 8.3.4/1: If the type of the identifier of D contains the auto
8689 type-specifier, the program is ill-formed. */
8690 if (type_uses_auto (type
))
8692 error ("%qD declared as array of %qT", name
, type
);
8693 return error_mark_node
;
8696 /* If there are some types which cannot be array elements,
8697 issue an error-message and return. */
8698 switch (TREE_CODE (type
))
8702 error ("declaration of %qD as array of void", name
);
8704 error ("creating array of void");
8705 return error_mark_node
;
8709 error ("declaration of %qD as array of functions", name
);
8711 error ("creating array of functions");
8712 return error_mark_node
;
8714 case REFERENCE_TYPE
:
8716 error ("declaration of %qD as array of references", name
);
8718 error ("creating array of references");
8719 return error_mark_node
;
8723 error ("declaration of %qD as array of function members", name
);
8725 error ("creating array of function members");
8726 return error_mark_node
;
8734 The constant expressions that specify the bounds of the arrays
8735 can be omitted only for the first member of the sequence. */
8736 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8739 error ("declaration of %qD as multidimensional array must "
8740 "have bounds for all dimensions except the first",
8743 error ("multidimensional array must have bounds for all "
8744 "dimensions except the first");
8746 return error_mark_node
;
8749 /* Figure out the index type for the array. */
8751 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8754 T is called the array element type; this type shall not be [...] an
8755 abstract class type. */
8756 abstract_virtuals_error (name
, type
);
8758 return build_cplus_array_type (type
, itype
);
8761 /* Check that it's OK to declare a function with the indicated TYPE.
8762 SFK indicates the kind of special function (if any) that this
8763 function is. OPTYPE is the type given in a conversion operator
8764 declaration, or the class type for a constructor/destructor.
8765 Returns the actual return type of the function; that
8766 may be different than TYPE if an error occurs, or for certain
8767 special functions. */
8770 check_special_function_return_type (special_function_kind sfk
,
8776 case sfk_constructor
:
8778 error ("return type specification for constructor invalid");
8780 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8781 type
= build_pointer_type (optype
);
8783 type
= void_type_node
;
8786 case sfk_destructor
:
8788 error ("return type specification for destructor invalid");
8789 /* We can't use the proper return type here because we run into
8790 problems with ambiguous bases and covariant returns.
8791 Java classes are left unchanged because (void *) isn't a valid
8792 Java type, and we don't want to change the Java ABI. */
8793 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8794 type
= build_pointer_type (void_type_node
);
8796 type
= void_type_node
;
8799 case sfk_conversion
:
8801 error ("return type specified for %<operator %T%>", optype
);
8812 /* A variable or data member (whose unqualified name is IDENTIFIER)
8813 has been declared with the indicated TYPE. If the TYPE is not
8814 acceptable, issue an error message and return a type to use for
8815 error-recovery purposes. */
8818 check_var_type (tree identifier
, tree type
)
8820 if (VOID_TYPE_P (type
))
8823 error ("unnamed variable or field declared void");
8824 else if (identifier_p (identifier
))
8826 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8827 error ("variable or field %qE declared void", identifier
);
8830 error ("variable or field declared void");
8831 type
= error_mark_node
;
8837 /* Given declspecs and a declarator (abstract or otherwise), determine
8838 the name and type of the object declared and construct a DECL node
8841 DECLSPECS points to the representation of declaration-specifier
8842 sequence that precedes declarator.
8844 DECL_CONTEXT says which syntactic context this declaration is in:
8845 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8846 FUNCDEF for a function definition. Like NORMAL but a few different
8847 error messages in each case. Return value may be zero meaning
8848 this definition is too screwy to try to parse.
8849 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8850 handle member functions (which have FIELD context).
8851 Return value may be zero meaning this definition is too screwy to
8853 PARM for a parameter declaration (either within a function prototype
8854 or before a function body). Make a PARM_DECL, or return void_type_node.
8855 TPARM for a template parameter declaration.
8856 CATCHPARM for a parameter declaration before a catch clause.
8857 TYPENAME if for a typename (in a cast or sizeof).
8858 Don't make a DECL node; just return the ..._TYPE node.
8859 FIELD for a struct or union field; make a FIELD_DECL.
8860 BITFIELD for a field with specified width.
8862 INITIALIZED is as for start_decl.
8864 ATTRLIST is a pointer to the list of attributes, which may be NULL
8865 if there are none; *ATTRLIST may be modified if attributes from inside
8866 the declarator should be applied to the declaration.
8868 When this function is called, scoping variables (such as
8869 CURRENT_CLASS_TYPE) should reflect the scope in which the
8870 declaration occurs, not the scope in which the new declaration will
8871 be placed. For example, on:
8875 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8878 Returns a DECL (if a declarator is present), a TYPE (if there is no
8879 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8883 grokdeclarator (const cp_declarator
*declarator
,
8884 cp_decl_specifier_seq
*declspecs
,
8885 enum decl_context decl_context
,
8889 tree type
= NULL_TREE
;
8891 int explicit_intN
= 0;
8892 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8893 int explicit_int
= 0;
8894 int explicit_char
= 0;
8895 int defaulted_int
= 0;
8897 tree typedef_decl
= NULL_TREE
;
8898 const char *name
= NULL
;
8899 tree typedef_type
= NULL_TREE
;
8900 /* True if this declarator is a function definition. */
8901 bool funcdef_flag
= false;
8902 cp_declarator_kind innermost_code
= cdk_error
;
8905 /* See the code below that used this. */
8906 tree decl_attr
= NULL_TREE
;
8909 /* Keep track of what sort of function is being processed
8910 so that we can warn about default return values, or explicit
8911 return values which do not match prescribed defaults. */
8912 special_function_kind sfk
= sfk_none
;
8914 tree dname
= NULL_TREE
;
8915 tree ctor_return_type
= NULL_TREE
;
8916 enum overload_flags flags
= NO_SPECIAL
;
8917 /* cv-qualifiers that apply to the declarator, for a declaration of
8918 a member function. */
8919 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8920 /* virt-specifiers that apply to the declarator, for a declaration of
8921 a member function. */
8922 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8923 /* ref-qualifier that applies to the declarator, for a declaration of
8924 a member function. */
8925 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8926 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8928 tree raises
= NULL_TREE
;
8929 int template_count
= 0;
8930 tree returned_attrs
= NULL_TREE
;
8931 tree parms
= NULL_TREE
;
8932 const cp_declarator
*id_declarator
;
8933 /* The unqualified name of the declarator; either an
8934 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8935 tree unqualified_id
;
8936 /* The class type, if any, in which this entity is located,
8937 or NULL_TREE if none. Note that this value may be different from
8938 the current class type; for example if an attempt is made to declare
8939 "A::f" inside "B", this value will be "A". */
8940 tree ctype
= current_class_type
;
8941 /* The NAMESPACE_DECL for the namespace in which this entity is
8942 located. If an unqualified name is used to declare the entity,
8943 this value will be NULL_TREE, even if the entity is located at
8945 tree in_namespace
= NULL_TREE
;
8946 cp_storage_class storage_class
;
8947 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8948 bool type_was_error_mark_node
= false;
8949 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8950 bool template_type_arg
= false;
8951 bool template_parm_flag
= false;
8952 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8953 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8954 bool late_return_type_p
= false;
8955 bool array_parameter_p
= false;
8956 source_location saved_loc
= input_location
;
8959 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8960 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8961 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8962 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8963 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8964 explicit_intN
= declspecs
->explicit_intN_p
;
8965 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8967 if (decl_context
== FUNCDEF
)
8968 funcdef_flag
= true, decl_context
= NORMAL
;
8969 else if (decl_context
== MEMFUNCDEF
)
8970 funcdef_flag
= true, decl_context
= FIELD
;
8971 else if (decl_context
== BITFIELD
)
8972 bitfield
= 1, decl_context
= FIELD
;
8973 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8974 template_type_arg
= true, decl_context
= TYPENAME
;
8975 else if (decl_context
== TPARM
)
8976 template_parm_flag
= true, decl_context
= PARM
;
8978 if (initialized
> 1)
8979 funcdef_flag
= true;
8981 /* Look inside a declarator for the name being declared
8982 and get it as a string, for an error message. */
8983 for (id_declarator
= declarator
;
8985 id_declarator
= id_declarator
->declarator
)
8987 if (id_declarator
->kind
!= cdk_id
)
8988 innermost_code
= id_declarator
->kind
;
8990 switch (id_declarator
->kind
)
8993 if (id_declarator
->declarator
8994 && id_declarator
->declarator
->kind
== cdk_id
)
8996 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8997 if (sfk
== sfk_destructor
)
9004 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
9005 tree decl
= id_declarator
->u
.id
.unqualified_name
;
9008 if (qualifying_scope
)
9010 if (at_function_scope_p ())
9014 A declarator-id shall not be qualified except
9017 None of the cases are permitted in block
9019 if (qualifying_scope
== global_namespace
)
9020 error ("invalid use of qualified-name %<::%D%>",
9022 else if (TYPE_P (qualifying_scope
))
9023 error ("invalid use of qualified-name %<%T::%D%>",
9024 qualifying_scope
, decl
);
9026 error ("invalid use of qualified-name %<%D::%D%>",
9027 qualifying_scope
, decl
);
9028 return error_mark_node
;
9030 else if (TYPE_P (qualifying_scope
))
9032 ctype
= qualifying_scope
;
9033 if (!MAYBE_CLASS_TYPE_P (ctype
))
9035 error ("%q#T is not a class or a namespace", ctype
);
9038 else if (innermost_code
!= cdk_function
9039 && current_class_type
9040 && !uniquely_derived_from_p (ctype
,
9041 current_class_type
))
9043 error ("invalid use of qualified-name %<%T::%D%>",
9044 qualifying_scope
, decl
);
9045 return error_mark_node
;
9048 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9049 in_namespace
= qualifying_scope
;
9051 switch (TREE_CODE (decl
))
9057 if (innermost_code
!= cdk_function
)
9059 error ("declaration of %qD as non-function", decl
);
9060 return error_mark_node
;
9062 else if (!qualifying_scope
9063 && !(current_class_type
&& at_class_scope_p ()))
9065 error ("declaration of %qD as non-member", decl
);
9066 return error_mark_node
;
9069 type
= TREE_OPERAND (decl
, 0);
9071 type
= constructor_name (type
);
9072 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9077 case TEMPLATE_ID_EXPR
:
9079 tree fns
= TREE_OPERAND (decl
, 0);
9082 if (!identifier_p (dname
))
9084 if (variable_template_p (dname
))
9085 dname
= DECL_NAME (dname
);
9088 gcc_assert (is_overloaded_fn (dname
));
9089 dname
= DECL_NAME (get_first_fn (dname
));
9095 case IDENTIFIER_NODE
:
9096 if (identifier_p (decl
))
9099 if (C_IS_RESERVED_WORD (dname
))
9101 error ("declarator-id missing; using reserved word %qD",
9103 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9105 else if (!IDENTIFIER_TYPENAME_P (dname
))
9106 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9109 gcc_assert (flags
== NO_SPECIAL
);
9110 flags
= TYPENAME_FLAG
;
9111 ctor_return_type
= TREE_TYPE (dname
);
9112 sfk
= sfk_conversion
;
9113 if (is_typename_at_global_scope (dname
))
9114 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9116 name
= "<invalid operator>";
9133 return error_mark_node
;
9138 if (id_declarator
->kind
== cdk_id
)
9144 The declarator in a function-definition shall have the form
9145 D1 ( parameter-declaration-clause) ... */
9146 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9148 error ("function definition does not declare parameters");
9149 return error_mark_node
;
9152 if (flags
== TYPENAME_FLAG
9153 && innermost_code
!= cdk_function
9154 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9156 error ("declaration of %qD as non-function", dname
);
9157 return error_mark_node
;
9161 && identifier_p (dname
)
9162 && UDLIT_OPER_P (dname
)
9163 && innermost_code
!= cdk_function
)
9165 error ("declaration of %qD as non-function", dname
);
9166 return error_mark_node
;
9169 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9173 error ("declaration of %qD as %<typedef%>", dname
);
9174 return error_mark_node
;
9176 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9178 error ("declaration of %qD as parameter", dname
);
9179 return error_mark_node
;
9183 /* Anything declared one level down from the top level
9184 must be one of the parameters of a function
9185 (because the body is at least two levels down). */
9187 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9188 by not allowing C++ class definitions to specify their parameters
9189 with xdecls (must be spec.d in the parmlist).
9191 Since we now wait to push a class scope until we are sure that
9192 we are in a legitimate method context, we must set oldcname
9193 explicitly (since current_class_name is not yet alive).
9195 We also want to avoid calling this a PARM if it is in a namespace. */
9197 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9199 cp_binding_level
*b
= current_binding_level
;
9200 current_binding_level
= b
->level_chain
;
9201 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9202 decl_context
= PARM
;
9203 current_binding_level
= b
;
9207 name
= decl_context
== PARM
? "parameter" : "type name";
9209 if (constexpr_p
&& typedef_p
)
9211 error ("%<constexpr%> cannot appear in a typedef declaration");
9212 return error_mark_node
;
9215 /* If there were multiple types specified in the decl-specifier-seq,
9216 issue an error message. */
9217 if (declspecs
->multiple_types_p
)
9219 error ("two or more data types in declaration of %qs", name
);
9220 return error_mark_node
;
9223 if (declspecs
->conflicting_specifiers_p
)
9225 error ("conflicting specifiers in declaration of %qs", name
);
9226 return error_mark_node
;
9229 /* Extract the basic type from the decl-specifier-seq. */
9230 type
= declspecs
->type
;
9231 if (type
== error_mark_node
)
9234 type_was_error_mark_node
= true;
9236 /* If the entire declaration is itself tagged as deprecated then
9237 suppress reports of deprecated items. */
9238 if (type
&& TREE_DEPRECATED (type
)
9239 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9240 warn_deprecated_use (type
, NULL_TREE
);
9241 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9243 typedef_decl
= type
;
9244 type
= TREE_TYPE (typedef_decl
);
9245 if (TREE_DEPRECATED (type
)
9246 && DECL_ARTIFICIAL (typedef_decl
)
9247 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9248 warn_deprecated_use (type
, NULL_TREE
);
9250 /* No type at all: default to `int', and set DEFAULTED_INT
9251 because it was not a user-defined typedef. */
9252 if (type
== NULL_TREE
)
9254 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9256 /* These imply 'int'. */
9257 type
= integer_type_node
;
9260 /* If we just have "complex", it is equivalent to "complex double". */
9261 else if (!longlong
&& !explicit_intN
9262 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9264 type
= double_type_node
;
9265 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9266 "ISO C++ does not support plain %<complex%> meaning "
9267 "%<double complex%>");
9271 explicit_int
= declspecs
->explicit_int_p
;
9272 explicit_char
= declspecs
->explicit_char_p
;
9275 /* See the code below that used this. */
9277 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9279 typedef_type
= type
;
9282 if (sfk
!= sfk_conversion
)
9283 ctor_return_type
= ctype
;
9285 if (sfk
!= sfk_none
)
9286 type
= check_special_function_return_type (sfk
, type
,
9288 else if (type
== NULL_TREE
)
9294 /* We handle `main' specially here, because 'main () { }' is so
9295 common. With no options, it is allowed. With -Wreturn-type,
9296 it is a warning. It is only an error with -pedantic-errors. */
9297 is_main
= (funcdef_flag
9298 && dname
&& identifier_p (dname
)
9299 && MAIN_NAME_P (dname
)
9300 && ctype
== NULL_TREE
9301 && in_namespace
== NULL_TREE
9302 && current_namespace
== global_namespace
);
9304 if (type_was_error_mark_node
)
9305 /* We've already issued an error, don't complain more. */;
9306 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9307 /* Allow it, sigh. */;
9309 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9311 pedwarn (input_location
, OPT_Wpedantic
,
9312 "ISO C++ forbids declaration of %qs with no type", name
);
9314 warning (OPT_Wreturn_type
,
9315 "ISO C++ forbids declaration of %qs with no type", name
);
9317 type
= integer_type_node
;
9324 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9326 error ("%<__int%d%> is not supported by this target",
9327 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9328 explicit_intN
= false;
9330 else if (pedantic
&& ! in_system_header_at (input_location
))
9331 pedwarn (input_location
, OPT_Wpedantic
,
9332 "ISO C++ does not support %<__int%d%> for %qs",
9333 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9336 /* Now process the modifiers that were specified
9337 and check for invalid combinations. */
9339 /* Long double is a special combination. */
9340 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9343 type
= cp_build_qualified_type (long_double_type_node
,
9344 cp_type_quals (type
));
9347 /* Check all other uses of type modifiers. */
9349 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9353 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9354 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9355 else if (signed_p
&& unsigned_p
)
9356 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9357 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9358 error ("%<long long%> invalid for %qs", name
);
9359 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9360 error ("%<long%> invalid for %qs", name
);
9361 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9362 error ("%<short%> invalid for %qs", name
);
9363 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9364 error ("%<long%> or %<short%> invalid for %qs", name
);
9365 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9366 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9367 else if ((long_p
|| short_p
) && explicit_char
)
9368 error ("%<long%> or %<short%> specified with char for %qs", name
);
9369 else if (long_p
&& short_p
)
9370 error ("%<long%> and %<short%> specified together for %qs", name
);
9371 else if (type
== char16_type_node
|| type
== char32_type_node
)
9373 if (signed_p
|| unsigned_p
)
9374 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9375 else if (short_p
|| long_p
)
9376 error ("%<short%> or %<long%> invalid for %qs", name
);
9381 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9383 pedwarn (input_location
, OPT_Wpedantic
,
9384 "long, short, signed or unsigned used invalidly for %qs",
9386 if (flag_pedantic_errors
)
9391 /* Discard the type modifiers if they are invalid. */
9402 /* Decide whether an integer type is signed or not.
9403 Optionally treat bitfields as signed by default. */
9407 It is implementation-defined whether a plain (neither
9408 explicitly signed or unsigned) char, short, int, or long
9409 bit-field is signed or unsigned.
9411 Naturally, we extend this to long long as well. Note that
9412 this does not include wchar_t. */
9413 || (bitfield
&& !flag_signed_bitfields
9415 /* A typedef for plain `int' without `signed' can be
9416 controlled just like plain `int', but a typedef for
9417 `signed int' cannot be so controlled. */
9419 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9420 && TREE_CODE (type
) == INTEGER_TYPE
9421 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9424 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9426 type
= long_long_unsigned_type_node
;
9428 type
= long_unsigned_type_node
;
9430 type
= short_unsigned_type_node
;
9431 else if (type
== char_type_node
)
9432 type
= unsigned_char_type_node
;
9433 else if (typedef_decl
)
9434 type
= unsigned_type_for (type
);
9436 type
= unsigned_type_node
;
9438 else if (signed_p
&& type
== char_type_node
)
9439 type
= signed_char_type_node
;
9440 else if (explicit_intN
)
9441 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9443 type
= long_long_integer_type_node
;
9445 type
= long_integer_type_node
;
9447 type
= short_integer_type_node
;
9449 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9451 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9452 error ("complex invalid for %qs", name
);
9453 /* If a modifier is specified, the resulting complex is the complex
9454 form of TYPE. E.g, "complex short" is "complex short int". */
9455 else if (type
== integer_type_node
)
9456 type
= complex_integer_type_node
;
9457 else if (type
== float_type_node
)
9458 type
= complex_float_type_node
;
9459 else if (type
== double_type_node
)
9460 type
= complex_double_type_node
;
9461 else if (type
== long_double_type_node
)
9462 type
= complex_long_double_type_node
;
9464 type
= build_complex_type (type
);
9467 type_quals
= TYPE_UNQUALIFIED
;
9468 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9469 type_quals
|= TYPE_QUAL_CONST
;
9470 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9471 type_quals
|= TYPE_QUAL_VOLATILE
;
9472 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9473 type_quals
|= TYPE_QUAL_RESTRICT
;
9474 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9475 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9478 /* If we're using the injected-class-name to form a compound type or a
9479 declaration, replace it with the underlying class so we don't get
9480 redundant typedefs in the debug output. But if we are returning the
9481 type unchanged, leave it alone so that it's available to
9482 maybe_get_template_decl_from_type_decl. */
9483 if (CLASS_TYPE_P (type
)
9484 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9485 && type
== TREE_TYPE (TYPE_NAME (type
))
9486 && (declarator
|| type_quals
))
9487 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9489 type_quals
|= cp_type_quals (type
);
9490 type
= cp_build_qualified_type_real
9491 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9492 || declspecs
->decltype_p
)
9493 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9494 /* We might have ignored or rejected some of the qualifiers. */
9495 type_quals
= cp_type_quals (type
);
9498 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9499 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9500 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9502 storage_class
= declspecs
->storage_class
;
9503 if (storage_class
== sc_static
)
9504 staticp
= 1 + (decl_context
== FIELD
);
9506 if (virtualp
&& staticp
== 2)
9508 error ("member %qD cannot be declared both virtual and static", dname
);
9509 storage_class
= sc_none
;
9512 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9514 /* Issue errors about use of storage classes for parameters. */
9515 if (decl_context
== PARM
)
9519 error ("typedef declaration invalid in parameter declaration");
9520 return error_mark_node
;
9522 else if (template_parm_flag
&& storage_class
!= sc_none
)
9524 error ("storage class specified for template parameter %qs", name
);
9525 return error_mark_node
;
9527 else if (storage_class
== sc_static
9528 || storage_class
== sc_extern
9530 error ("storage class specifiers invalid in parameter declarations");
9532 /* Function parameters cannot be constexpr. If we saw one, moan
9533 and pretend it wasn't there. */
9536 error ("a parameter cannot be declared %<constexpr%>");
9541 /* Give error if `virtual' is used outside of class declaration. */
9543 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9545 error_at (declspecs
->locations
[ds_virtual
],
9546 "%<virtual%> outside class declaration");
9550 /* Static anonymous unions are dealt with here. */
9551 if (staticp
&& decl_context
== TYPENAME
9553 && ANON_AGGR_TYPE_P (declspecs
->type
))
9554 decl_context
= FIELD
;
9556 /* Warn about storage classes that are invalid for certain
9557 kinds of declarations (parameters, typenames, etc.). */
9560 && storage_class
!= sc_extern
9561 && storage_class
!= sc_static
)
9564 error ("multiple storage classes in declaration of %qs", name
);
9567 if (decl_context
!= NORMAL
9568 && ((storage_class
!= sc_none
9569 && storage_class
!= sc_mutable
)
9572 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9573 && (storage_class
== sc_register
9574 || storage_class
== sc_auto
))
9578 else if (decl_context
== FIELD
9579 /* C++ allows static class elements. */
9580 && storage_class
== sc_static
)
9581 /* C++ also allows inlines and signed and unsigned elements,
9582 but in those cases we don't come in here. */
9586 if (decl_context
== FIELD
)
9587 error ("storage class specified for %qs", name
);
9590 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9591 error ("storage class specified for parameter %qs", name
);
9593 error ("storage class specified for typename");
9595 if (storage_class
== sc_register
9596 || storage_class
== sc_auto
9597 || storage_class
== sc_extern
9599 storage_class
= sc_none
;
9602 else if (storage_class
== sc_extern
&& funcdef_flag
9603 && ! toplevel_bindings_p ())
9604 error ("nested function %qs declared %<extern%>", name
);
9605 else if (toplevel_bindings_p ())
9607 if (storage_class
== sc_auto
)
9608 error ("top-level declaration of %qs specifies %<auto%>", name
);
9611 && storage_class
!= sc_extern
9612 && storage_class
!= sc_static
)
9614 if (declspecs
->gnu_thread_keyword_p
)
9615 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9616 "declared %<__thread%>", name
);
9618 /* When thread_local is applied to a variable of block scope the
9619 storage-class-specifier static is implied if it does not appear
9621 storage_class
= declspecs
->storage_class
= sc_static
;
9625 if (storage_class
&& friendp
)
9627 error ("storage class specifiers invalid in friend function declarations");
9628 storage_class
= sc_none
;
9633 unqualified_id
= NULL_TREE
;
9636 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9637 switch (TREE_CODE (unqualified_id
))
9640 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9641 if (TYPE_P (unqualified_id
))
9642 unqualified_id
= constructor_name (unqualified_id
);
9645 case IDENTIFIER_NODE
:
9646 case TEMPLATE_ID_EXPR
:
9654 if (declspecs
->std_attributes
)
9656 /* Apply the c++11 attributes to the type preceding them. */
9657 input_location
= declspecs
->locations
[ds_std_attribute
];
9658 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9659 input_location
= saved_loc
;
9662 /* Determine the type of the entity declared by recurring on the
9664 for (; declarator
; declarator
= declarator
->declarator
)
9666 const cp_declarator
*inner_declarator
;
9669 if (type
== error_mark_node
)
9670 return error_mark_node
;
9672 attrs
= declarator
->attributes
;
9678 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9679 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9680 if (declarator
->kind
== cdk_function
)
9681 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9682 if (declarator
->kind
== cdk_array
)
9683 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9684 returned_attrs
= decl_attributes (&type
,
9685 chainon (returned_attrs
, attrs
),
9689 if (declarator
->kind
== cdk_id
)
9692 inner_declarator
= declarator
->declarator
;
9694 switch (declarator
->kind
)
9697 type
= create_array_type_for_decl (dname
, type
,
9698 declarator
->u
.array
.bounds
);
9699 if (declarator
->std_attributes
)
9702 The optional attribute-specifier-seq appertains to the
9704 returned_attrs
= chainon (returned_attrs
,
9705 declarator
->std_attributes
);
9713 /* Declaring a function type.
9714 Make sure we have a valid type for the function to return. */
9716 if (type_quals
!= TYPE_UNQUALIFIED
)
9718 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9719 warning (OPT_Wignored_qualifiers
,
9720 "type qualifiers ignored on function return type");
9721 /* We now know that the TYPE_QUALS don't apply to the
9722 decl, but to its return type. */
9723 type_quals
= TYPE_UNQUALIFIED
;
9725 errmsg
= targetm
.invalid_return_type (type
);
9729 type
= integer_type_node
;
9732 /* Error about some types functions can't return. */
9734 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9736 error ("%qs declared as function returning a function", name
);
9737 return error_mark_node
;
9739 if (TREE_CODE (type
) == ARRAY_TYPE
)
9741 error ("%qs declared as function returning an array", name
);
9742 return error_mark_node
;
9745 input_location
= declspecs
->locations
[ds_type_spec
];
9746 abstract_virtuals_error (ACU_RETURN
, type
);
9747 input_location
= saved_loc
;
9749 /* Pick up type qualifiers which should be applied to `this'. */
9750 memfn_quals
= declarator
->u
.function
.qualifiers
;
9751 /* Pick up virt-specifiers. */
9752 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9753 /* And ref-qualifier, too */
9754 rqual
= declarator
->u
.function
.ref_qualifier
;
9755 /* Pick up the exception specifications. */
9756 raises
= declarator
->u
.function
.exception_specification
;
9757 /* If the exception-specification is ill-formed, let's pretend
9758 there wasn't one. */
9759 if (raises
== error_mark_node
)
9762 /* Say it's a definition only for the CALL_EXPR
9763 closest to the identifier. */
9764 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9766 /* Handle a late-specified return type. */
9769 if (type_uses_auto (type
))
9771 if (!declarator
->u
.function
.late_return_type
)
9773 if (current_class_type
9774 && LAMBDA_TYPE_P (current_class_type
))
9775 /* OK for C++11 lambdas. */;
9776 else if (cxx_dialect
< cxx14
)
9778 error ("%qs function uses "
9779 "%<auto%> type specifier without trailing "
9780 "return type", name
);
9781 inform (input_location
, "deduced return type "
9782 "only available with -std=c++14 or "
9787 error ("virtual function cannot "
9788 "have deduced return type");
9792 else if (!is_auto (type
) && sfk
!= sfk_conversion
)
9794 error ("%qs function with trailing return type has"
9795 " %qT as its type rather than plain %<auto%>",
9797 return error_mark_node
;
9800 else if (declarator
->u
.function
.late_return_type
9801 && sfk
!= sfk_conversion
)
9803 if (cxx_dialect
< cxx11
)
9804 /* Not using maybe_warn_cpp0x because this should
9805 always be an error. */
9806 error ("trailing return type only available with "
9807 "-std=c++11 or -std=gnu++11");
9809 error ("%qs function with trailing return type not "
9810 "declared with %<auto%> type specifier", name
);
9811 return error_mark_node
;
9814 type
= splice_late_return_type
9815 (type
, declarator
->u
.function
.late_return_type
);
9816 if (type
== error_mark_node
)
9817 return error_mark_node
;
9819 if (declarator
->u
.function
.late_return_type
)
9820 late_return_type_p
= true;
9822 if (ctype
== NULL_TREE
9823 && decl_context
== FIELD
9826 ctype
= current_class_type
;
9828 if (ctype
&& (sfk
== sfk_constructor
9829 || sfk
== sfk_destructor
))
9831 /* We are within a class's scope. If our declarator name
9832 is the same as the class name, and we are defining
9833 a function, then it is a constructor/destructor, and
9834 therefore returns a void type. */
9836 /* ISO C++ 12.4/2. A destructor may not be declared
9837 const or volatile. A destructor may not be static.
9838 A destructor may not be declared with ref-qualifier.
9840 ISO C++ 12.1. A constructor may not be declared
9841 const or volatile. A constructor may not be
9842 virtual. A constructor may not be static.
9843 A constructor may not be declared with ref-qualifier. */
9845 error ((flags
== DTOR_FLAG
)
9846 ? G_("destructor cannot be static member function")
9847 : G_("constructor cannot be static member function"));
9850 error ((flags
== DTOR_FLAG
)
9851 ? G_("destructors may not be cv-qualified")
9852 : G_("constructors may not be cv-qualified"));
9853 memfn_quals
= TYPE_UNQUALIFIED
;
9858 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9859 error ((flags
== DTOR_FLAG
)
9860 ? "destructors may not be ref-qualified"
9861 : "constructors may not be ref-qualified");
9862 rqual
= REF_QUAL_NONE
;
9865 if (decl_context
== FIELD
9866 && !member_function_or_else (ctype
,
9869 return error_mark_node
;
9871 if (flags
!= DTOR_FLAG
)
9873 /* It's a constructor. */
9878 permerror (input_location
, "constructors cannot be declared virtual");
9881 if (decl_context
== FIELD
9882 && sfk
!= sfk_constructor
)
9883 return error_mark_node
;
9885 if (decl_context
== FIELD
)
9892 /* Cannot be both friend and virtual. */
9893 error ("virtual functions cannot be friends");
9896 if (decl_context
== NORMAL
)
9897 error ("friend declaration not in class definition");
9898 if (current_function_decl
&& funcdef_flag
)
9899 error ("can%'t define friend function %qs in a local "
9903 else if (ctype
&& sfk
== sfk_conversion
)
9907 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9910 if (late_return_type_p
)
9911 error ("a conversion function cannot have a trailing return type");
9914 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9917 if (inner_declarator
9918 && inner_declarator
->kind
== cdk_id
9919 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9920 && arg_types
!= void_list_node
)
9922 error ("destructors may not have parameters");
9923 arg_types
= void_list_node
;
9927 type
= build_function_type (type
, arg_types
);
9928 if (declarator
->std_attributes
)
9931 The optional attribute-specifier-seq appertains to
9932 the function type. */
9933 decl_attributes (&type
, declarator
->std_attributes
,
9941 /* Filter out pointers-to-references and references-to-references.
9942 We can get these if a TYPE_DECL is used. */
9944 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9946 if (declarator
->kind
!= cdk_reference
)
9948 error ("cannot declare pointer to %q#T", type
);
9949 type
= TREE_TYPE (type
);
9952 /* In C++0x, we allow reference to reference declarations
9953 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9954 and template type arguments [14.3.1/4 temp.arg.type]. The
9955 check for direct reference to reference declarations, which
9956 are still forbidden, occurs below. Reasoning behind the change
9957 can be found in DR106, DR540, and the rvalue reference
9959 else if (cxx_dialect
== cxx98
)
9961 error ("cannot declare reference to %q#T", type
);
9962 type
= TREE_TYPE (type
);
9965 else if (VOID_TYPE_P (type
))
9967 if (declarator
->kind
== cdk_reference
)
9968 error ("cannot declare reference to %q#T", type
);
9969 else if (declarator
->kind
== cdk_ptrmem
)
9970 error ("cannot declare pointer to %q#T member", type
);
9973 /* We now know that the TYPE_QUALS don't apply to the decl,
9974 but to the target of the pointer. */
9975 type_quals
= TYPE_UNQUALIFIED
;
9977 /* This code used to handle METHOD_TYPE, but I don't think it's
9978 possible to get it here anymore. */
9979 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9980 if (declarator
->kind
== cdk_ptrmem
9981 && TREE_CODE (type
) == FUNCTION_TYPE
)
9983 memfn_quals
|= type_memfn_quals (type
);
9984 type
= build_memfn_type (type
,
9985 declarator
->u
.pointer
.class_type
,
9988 if (type
== error_mark_node
)
9989 return error_mark_node
;
9991 rqual
= REF_QUAL_NONE
;
9992 memfn_quals
= TYPE_UNQUALIFIED
;
9995 if (TREE_CODE (type
) == FUNCTION_TYPE
9996 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9997 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9998 error (declarator
->kind
== cdk_reference
9999 ? G_("cannot declare reference to qualified function type %qT")
10000 : G_("cannot declare pointer to qualified function type %qT"),
10003 /* When the pointed-to type involves components of variable size,
10004 care must be taken to ensure that the size evaluation code is
10005 emitted early enough to dominate all the possible later uses
10006 and late enough for the variables on which it depends to have
10009 This is expected to happen automatically when the pointed-to
10010 type has a name/declaration of it's own, but special attention
10011 is required if the type is anonymous.
10013 We handle the NORMAL and FIELD contexts here by inserting a
10014 dummy statement that just evaluates the size at a safe point
10015 and ensures it is not deferred until e.g. within a deeper
10016 conditional context (c++/43555).
10018 We expect nothing to be needed here for PARM or TYPENAME.
10019 Evaluating the size at this point for TYPENAME would
10020 actually be incorrect, as we might be in the middle of an
10021 expression with side effects on the pointed-to type size
10022 "arguments" prior to the pointer declaration point and the
10023 size evaluation could end up prior to the side effects. */
10025 if (!TYPE_NAME (type
)
10026 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10027 && at_function_scope_p ()
10028 && variably_modified_type_p (type
, NULL_TREE
))
10029 /* Force evaluation of the SAVE_EXPR. */
10030 finish_expr_stmt (TYPE_SIZE (type
));
10032 if (declarator
->kind
== cdk_reference
)
10034 /* In C++0x, the type we are creating a reference to might be
10035 a typedef which is itself a reference type. In that case,
10036 we follow the reference collapsing rules in
10037 [7.1.3/8 dcl.typedef] to create the final reference type:
10039 "If a typedef TD names a type that is a reference to a type
10040 T, an attempt to create the type 'lvalue reference to cv TD'
10041 creates the type 'lvalue reference to T,' while an attempt
10042 to create the type "rvalue reference to cv TD' creates the
10045 if (VOID_TYPE_P (type
))
10046 /* We already gave an error. */;
10047 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10049 if (declarator
->u
.reference
.rvalue_ref
)
10050 /* Leave type alone. */;
10052 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10055 type
= cp_build_reference_type
10056 (type
, declarator
->u
.reference
.rvalue_ref
);
10058 /* In C++0x, we need this check for direct reference to
10059 reference declarations, which are forbidden by
10060 [8.3.2/5 dcl.ref]. Reference to reference declarations
10061 are only allowed indirectly through typedefs and template
10062 type arguments. Example:
10064 void foo(int & &); // invalid ref-to-ref decl
10066 typedef int & int_ref;
10067 void foo(int_ref &); // valid ref-to-ref decl
10069 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10070 error ("cannot declare reference to %q#T, which is not "
10071 "a typedef or a template type argument", type
);
10073 else if (TREE_CODE (type
) == METHOD_TYPE
)
10074 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10075 else if (declarator
->kind
== cdk_ptrmem
)
10077 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10078 != NAMESPACE_DECL
);
10079 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10080 /* We will already have complained. */
10081 type
= error_mark_node
;
10083 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10087 type
= build_pointer_type (type
);
10089 /* Process a list of type modifier keywords (such as
10090 const or volatile) that were given inside the `*' or `&'. */
10092 if (declarator
->u
.pointer
.qualifiers
)
10095 = cp_build_qualified_type (type
,
10096 declarator
->u
.pointer
.qualifiers
);
10097 type_quals
= cp_type_quals (type
);
10100 /* Apply C++11 attributes to the pointer, and not to the
10101 type pointed to. This is unlike what is done for GNU
10102 attributes above. It is to comply with [dcl.ptr]/1:
10104 [the optional attribute-specifier-seq (7.6.1) appertains
10105 to the pointer and not to the object pointed to]. */
10106 if (declarator
->std_attributes
)
10107 decl_attributes (&type
, declarator
->std_attributes
,
10117 gcc_unreachable ();
10121 /* A `constexpr' specifier used in an object declaration declares
10122 the object as `const'. */
10123 if (constexpr_p
&& innermost_code
!= cdk_function
)
10125 /* DR1688 says that a `constexpr' specifier in combination with
10126 `volatile' is valid. */
10128 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10130 type_quals
|= TYPE_QUAL_CONST
;
10131 type
= cp_build_qualified_type (type
, type_quals
);
10135 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10136 && TREE_CODE (type
) != FUNCTION_TYPE
10137 && TREE_CODE (type
) != METHOD_TYPE
10138 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10140 error ("template-id %qD used as a declarator",
10142 unqualified_id
= dname
;
10145 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10146 qualified with a class-name, turn it into a METHOD_TYPE, unless
10147 we know that the function is static. We take advantage of this
10148 opportunity to do other processing that pertains to entities
10149 explicitly declared to be class members. Note that if DECLARATOR
10150 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10151 would not have exited the loop above. */
10153 && declarator
->u
.id
.qualifying_scope
10154 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10156 ctype
= declarator
->u
.id
.qualifying_scope
;
10157 ctype
= TYPE_MAIN_VARIANT (ctype
);
10158 template_count
= num_template_headers_for_class (ctype
);
10160 if (ctype
== current_class_type
)
10164 permerror (input_location
, "member functions are implicitly friends of their class");
10168 permerror (declarator
->id_loc
,
10169 "extra qualification %<%T::%> on member %qs",
10172 else if (/* If the qualifying type is already complete, then we
10173 can skip the following checks. */
10174 !COMPLETE_TYPE_P (ctype
)
10175 && (/* If the function is being defined, then
10176 qualifying type must certainly be complete. */
10178 /* A friend declaration of "T::f" is OK, even if
10179 "T" is a template parameter. But, if this
10180 function is not a friend, the qualifying type
10181 must be a class. */
10182 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10183 /* For a declaration, the type need not be
10184 complete, if either it is dependent (since there
10185 is no meaningful definition of complete in that
10186 case) or the qualifying class is currently being
10188 || !(dependent_type_p (ctype
)
10189 || currently_open_class (ctype
)))
10190 /* Check that the qualifying type is complete. */
10191 && !complete_type_or_else (ctype
, NULL_TREE
))
10192 return error_mark_node
;
10193 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10195 if (current_class_type
10196 && (!friendp
|| funcdef_flag
))
10198 error (funcdef_flag
10199 ? G_("cannot define member function %<%T::%s%> "
10201 : G_("cannot declare member function %<%T::%s%> "
10203 ctype
, name
, current_class_type
);
10204 return error_mark_node
;
10207 else if (typedef_p
&& current_class_type
)
10209 error ("cannot declare member %<%T::%s%> within %qT",
10210 ctype
, name
, current_class_type
);
10211 return error_mark_node
;
10215 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10216 ctype
= current_class_type
;
10218 /* Now TYPE has the actual type. */
10220 if (returned_attrs
)
10223 *attrlist
= chainon (returned_attrs
, *attrlist
);
10225 attrlist
= &returned_attrs
;
10229 && declarator
->kind
== cdk_id
10230 && declarator
->std_attributes
)
10231 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10232 a declarator-id appertains to the entity that is declared. */
10233 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10235 /* Handle parameter packs. */
10236 if (parameter_pack_p
)
10238 if (decl_context
== PARM
)
10239 /* Turn the type into a pack expansion.*/
10240 type
= make_pack_expansion (type
);
10242 error ("non-parameter %qs cannot be a parameter pack", name
);
10245 /* Did array size calculations overflow or does the array cover more
10246 than half of the address-space? */
10247 if (TREE_CODE (type
) == ARRAY_TYPE
10248 && COMPLETE_TYPE_P (type
)
10249 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10250 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10252 error ("size of array %qs is too large", name
);
10253 /* If we proceed with the array type as it is, we'll eventually
10254 crash in tree_to_[su]hwi(). */
10255 type
= error_mark_node
;
10258 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10259 && !processing_template_decl
10260 && variably_modified_type_p (type
, NULL_TREE
))
10262 if (decl_context
== FIELD
)
10263 error ("data member may not have variably modified type %qT", type
);
10265 error ("parameter may not have variably modified type %qT", type
);
10266 type
= error_mark_node
;
10269 if (explicitp
== 1 || (explicitp
&& friendp
))
10271 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10272 in the declaration of a constructor or conversion function within
10273 a class definition. */
10274 if (!current_class_type
)
10275 error_at (declspecs
->locations
[ds_explicit
],
10276 "%<explicit%> outside class declaration");
10278 error_at (declspecs
->locations
[ds_explicit
],
10279 "%<explicit%> in friend declaration");
10281 error_at (declspecs
->locations
[ds_explicit
],
10282 "only declarations of constructors and conversion operators "
10283 "can be %<explicit%>");
10287 if (storage_class
== sc_mutable
)
10289 if (decl_context
!= FIELD
|| friendp
)
10291 error ("non-member %qs cannot be declared %<mutable%>", name
);
10292 storage_class
= sc_none
;
10294 else if (decl_context
== TYPENAME
|| typedef_p
)
10296 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10297 storage_class
= sc_none
;
10299 else if (TREE_CODE (type
) == FUNCTION_TYPE
10300 || TREE_CODE (type
) == METHOD_TYPE
)
10302 error ("function %qs cannot be declared %<mutable%>", name
);
10303 storage_class
= sc_none
;
10307 error ("static %qs cannot be declared %<mutable%>", name
);
10308 storage_class
= sc_none
;
10310 else if (type_quals
& TYPE_QUAL_CONST
)
10312 error ("const %qs cannot be declared %<mutable%>", name
);
10313 storage_class
= sc_none
;
10315 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10317 permerror (input_location
, "reference %qs cannot be declared "
10318 "%<mutable%>", name
);
10319 storage_class
= sc_none
;
10323 /* If this is declaring a typedef name, return a TYPE_DECL. */
10324 if (typedef_p
&& decl_context
!= TYPENAME
)
10328 /* Note that the grammar rejects storage classes
10329 in typenames, fields or parameters. */
10330 if (current_lang_name
== lang_name_java
)
10331 TYPE_FOR_JAVA (type
) = 1;
10333 /* This declaration:
10335 typedef void f(int) const;
10337 declares a function type which is not a member of any
10338 particular class, but which is cv-qualified; for
10339 example "f S::*" declares a pointer to a const-qualified
10340 member function of S. We record the cv-qualification in the
10342 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10344 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10346 /* We have now dealt with these qualifiers. */
10347 memfn_quals
= TYPE_UNQUALIFIED
;
10348 rqual
= REF_QUAL_NONE
;
10351 if (type_uses_auto (type
))
10353 error ("typedef declared %<auto%>");
10354 type
= error_mark_node
;
10357 if (decl_context
== FIELD
)
10358 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10360 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10361 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10362 error_at (DECL_SOURCE_LOCATION (decl
),
10363 "typedef name may not be a nested-name-specifier");
10364 TREE_TYPE (decl
) = error_mark_node
;
10367 if (decl_context
!= FIELD
)
10369 if (!current_function_decl
)
10370 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10371 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10372 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10373 (current_function_decl
)))
10374 /* The TYPE_DECL is "abstract" because there will be
10375 clones of this constructor/destructor, and there will
10376 be copies of this TYPE_DECL generated in those
10377 clones. The decloning optimization (for space) may
10378 revert this subsequently if it determines that
10379 the clones should share a common implementation. */
10380 DECL_ABSTRACT_P (decl
) = true;
10382 else if (current_class_type
10383 && constructor_name_p (unqualified_id
, current_class_type
))
10384 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10385 "as enclosing class",
10388 /* If the user declares "typedef struct {...} foo" then the
10389 struct will have an anonymous name. Fill that name in now.
10390 Nothing can refer to it, so nothing needs know about the name
10392 if (type
!= error_mark_node
10394 && TYPE_NAME (type
)
10395 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10396 && TYPE_ANONYMOUS_P (type
)
10397 && declspecs
->type_definition_p
10398 && attributes_naming_typedef_ok (*attrlist
)
10399 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10403 /* Replace the anonymous name with the real name everywhere. */
10404 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10406 if (anon_aggrname_p (TYPE_IDENTIFIER (t
)))
10407 /* We do not rename the debug info representing the
10408 anonymous tagged type because the standard says in
10409 [dcl.typedef] that the naming applies only for
10410 linkage purposes. */
10411 /*debug_hooks->set_name (t, decl);*/
10412 TYPE_NAME (t
) = decl
;
10415 if (TYPE_LANG_SPECIFIC (type
))
10416 TYPE_WAS_ANONYMOUS (type
) = 1;
10418 /* If this is a typedef within a template class, the nested
10419 type is a (non-primary) template. The name for the
10420 template needs updating as well. */
10421 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10422 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10423 = TYPE_IDENTIFIER (type
);
10425 /* Adjust linkage now that we aren't anonymous anymore. */
10426 reset_type_linkage (type
);
10428 /* FIXME remangle member functions; member functions of a
10429 type with external linkage have external linkage. */
10433 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10434 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10436 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10437 memfn_quals
!= TYPE_UNQUALIFIED
,
10438 inlinep
, friendp
, raises
!= NULL_TREE
);
10440 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10441 /* Acknowledge that this was written:
10442 `using analias = atype;'. */
10443 TYPE_DECL_ALIAS_P (decl
) = 1;
10448 /* Detect the case of an array type of unspecified size
10449 which came, as such, direct from a typedef name.
10450 We must copy the type, so that the array's domain can be
10451 individually set by the object's initializer. */
10453 if (type
&& typedef_type
10454 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10455 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10456 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10458 /* Detect where we're using a typedef of function type to declare a
10459 function. PARMS will not be set, so we must create it now. */
10461 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10463 tree decls
= NULL_TREE
;
10466 for (args
= TYPE_ARG_TYPES (type
);
10467 args
&& args
!= void_list_node
;
10468 args
= TREE_CHAIN (args
))
10470 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10472 DECL_CHAIN (decl
) = decls
;
10476 parms
= nreverse (decls
);
10478 if (decl_context
!= TYPENAME
)
10480 /* The qualifiers on the function type become the qualifiers on
10481 the non-static member function. */
10482 memfn_quals
|= type_memfn_quals (type
);
10483 rqual
= type_memfn_rqual (type
);
10484 type_quals
= TYPE_UNQUALIFIED
;
10488 /* If this is a type name (such as, in a cast or sizeof),
10489 compute the type and return it now. */
10491 if (decl_context
== TYPENAME
)
10493 /* Note that here we don't care about type_quals. */
10495 /* Special case: "friend class foo" looks like a TYPENAME context. */
10500 error ("%<inline%> specified for friend class declaration");
10506 /* Don't allow friend declaration without a class-key. */
10507 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10508 permerror (input_location
, "template parameters cannot be friends");
10509 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10510 permerror (input_location
, "friend declaration requires class-key, "
10511 "i.e. %<friend class %T::%D%>",
10512 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10514 permerror (input_location
, "friend declaration requires class-key, "
10515 "i.e. %<friend %#T%>",
10519 /* Only try to do this stuff if we didn't already give up. */
10520 if (type
!= integer_type_node
)
10522 /* A friendly class? */
10523 if (current_class_type
)
10524 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10525 /*complain=*/true);
10527 error ("trying to make class %qT a friend of global scope",
10530 type
= void_type_node
;
10533 else if (memfn_quals
|| rqual
)
10535 if (ctype
== NULL_TREE
10536 && TREE_CODE (type
) == METHOD_TYPE
)
10537 ctype
= TYPE_METHOD_BASETYPE (type
);
10540 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10541 /* Core issue #547: need to allow this in template type args.
10542 Allow it in general in C++11 for alias-declarations. */
10543 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10544 && TREE_CODE (type
) == FUNCTION_TYPE
)
10545 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10547 error ("invalid qualifiers on non-member function type");
10552 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10553 && decl_context
!= CATCHPARM
10554 && TREE_CODE (type
) != UNION_TYPE
10557 error ("abstract declarator %qT used as declaration", type
);
10558 return error_mark_node
;
10561 /* Only functions may be declared using an operator-function-id. */
10563 && IDENTIFIER_OPNAME_P (unqualified_id
)
10564 && TREE_CODE (type
) != FUNCTION_TYPE
10565 && TREE_CODE (type
) != METHOD_TYPE
)
10567 error ("declaration of %qD as non-function", unqualified_id
);
10568 return error_mark_node
;
10571 /* We don't check parameter types here because we can emit a better
10572 error message later. */
10573 if (decl_context
!= PARM
)
10575 type
= check_var_type (unqualified_id
, type
);
10576 if (type
== error_mark_node
)
10577 return error_mark_node
;
10580 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10581 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10583 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10585 if (ctype
|| in_namespace
)
10586 error ("cannot use %<::%> in parameter declaration");
10588 if (type_uses_auto (type
))
10590 if (cxx_dialect
>= cxx14
)
10591 error ("%<auto%> parameter not permitted in this context");
10593 error ("parameter declared %<auto%>");
10594 type
= error_mark_node
;
10597 /* A parameter declared as an array of T is really a pointer to T.
10598 One declared as a function is really a pointer to a function.
10599 One declared as a member is really a pointer to member. */
10601 if (TREE_CODE (type
) == ARRAY_TYPE
)
10603 /* Transfer const-ness of array into that of type pointed to. */
10604 type
= build_pointer_type (TREE_TYPE (type
));
10605 type_quals
= TYPE_UNQUALIFIED
;
10606 array_parameter_p
= true;
10608 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10609 type
= build_pointer_type (type
);
10612 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10613 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10615 cp_cv_quals real_quals
= memfn_quals
;
10616 if (cxx_dialect
< cxx14
&& constexpr_p
10617 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10618 real_quals
|= TYPE_QUAL_CONST
;
10619 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10625 if (decl_context
== PARM
)
10627 decl
= cp_build_parm_decl (unqualified_id
, type
);
10628 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10630 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10631 memfn_quals
!= TYPE_UNQUALIFIED
,
10632 inlinep
, friendp
, raises
!= NULL_TREE
);
10634 else if (decl_context
== FIELD
)
10636 if (!staticp
&& !friendp
&& TREE_CODE (type
) != METHOD_TYPE
10637 && type_uses_auto (type
))
10639 error ("non-static data member declared %<auto%>");
10640 type
= error_mark_node
;
10643 /* The C99 flexible array extension. */
10644 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10645 && TYPE_DOMAIN (type
) == NULL_TREE
)
10647 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10648 tf_warning_or_error
);
10649 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10652 if (type
== error_mark_node
)
10654 /* Happens when declaring arrays of sizes which
10655 are error_mark_node, for example. */
10658 else if (in_namespace
&& !friendp
)
10660 /* Something like struct S { int N::j; }; */
10661 error ("invalid use of %<::%>");
10662 return error_mark_node
;
10664 else if (TREE_CODE (type
) == FUNCTION_TYPE
10665 || TREE_CODE (type
) == METHOD_TYPE
)
10668 tree function_context
;
10672 /* This should never happen in pure C++ (the check
10673 could be an assert). It could happen in
10674 Objective-C++ if someone writes invalid code that
10675 uses a function declaration for an instance
10676 variable or property (instance variables and
10677 properties are parsed as FIELD_DECLs, but they are
10678 part of an Objective-C class, not a C++ class).
10679 That code is invalid and is caught by this
10683 error ("declaration of function %qD in invalid context",
10685 return error_mark_node
;
10688 /* ``A union may [ ... ] not [ have ] virtual functions.''
10690 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10692 error ("function %qD declared virtual inside a union",
10694 return error_mark_node
;
10697 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10701 error ("%qD cannot be declared virtual, since it "
10702 "is always static",
10709 /* Check that the name used for a destructor makes sense. */
10710 if (sfk
== sfk_destructor
)
10712 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10716 gcc_assert (friendp
);
10717 error ("expected qualified name in friend declaration "
10718 "for destructor %qD", uqname
);
10719 return error_mark_node
;
10722 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10724 error ("declaration of %qD as member of %qT",
10726 return error_mark_node
;
10730 error ("a destructor cannot be %<constexpr%>");
10731 return error_mark_node
;
10734 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10736 error ("expected qualified name in friend declaration "
10737 "for constructor %qD",
10738 id_declarator
->u
.id
.unqualified_name
);
10739 return error_mark_node
;
10742 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10744 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
10745 if (variable_template_p (tmpl
))
10747 error ("specialization of variable template %qD "
10748 "declared as function", tmpl
);
10749 inform (DECL_SOURCE_LOCATION (tmpl
),
10750 "variable template declared here");
10751 return error_mark_node
;
10755 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10756 function_context
= (ctype
!= NULL_TREE
) ?
10757 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10758 publicp
= (! friendp
|| ! staticp
)
10759 && function_context
== NULL_TREE
;
10761 if (late_return_type_p
)
10762 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10764 decl
= grokfndecl (ctype
, type
,
10765 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10766 ? unqualified_id
: dname
,
10769 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10770 friendp
? -1 : 0, friendp
, publicp
,
10771 inlinep
| (2 * constexpr_p
),
10772 initialized
== SD_DELETED
, sfk
,
10773 funcdef_flag
, template_count
, in_namespace
,
10774 attrlist
, declarator
->id_loc
);
10775 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10776 if (decl
== NULL_TREE
)
10777 return error_mark_node
;
10779 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10780 /* The decl and setting of decl_attr is also turned off. */
10781 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10784 /* [class.conv.ctor]
10786 A constructor declared without the function-specifier
10787 explicit that can be called with a single parameter
10788 specifies a conversion from the type of its first
10789 parameter to the type of its class. Such a constructor
10790 is called a converting constructor. */
10791 if (explicitp
== 2)
10792 DECL_NONCONVERTING_P (decl
) = 1;
10794 else if (!staticp
&& !dependent_type_p (type
)
10795 && !COMPLETE_TYPE_P (complete_type (type
))
10796 && (TREE_CODE (type
) != ARRAY_TYPE
10797 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10798 || initialized
== 0))
10800 if (unqualified_id
)
10802 error ("field %qD has incomplete type %qT",
10803 unqualified_id
, type
);
10804 cxx_incomplete_type_inform (strip_array_types (type
));
10807 error ("name %qT has incomplete type", type
);
10809 type
= error_mark_node
;
10816 error ("%qE is neither function nor member function; "
10817 "cannot be declared friend", unqualified_id
);
10825 /* Friends are treated specially. */
10826 if (ctype
== current_class_type
)
10827 ; /* We already issued a permerror. */
10828 else if (decl
&& DECL_NAME (decl
))
10830 if (template_class_depth (current_class_type
) == 0)
10832 decl
= check_explicit_specialization
10833 (unqualified_id
, decl
, template_count
,
10834 2 * funcdef_flag
+ 4);
10835 if (decl
== error_mark_node
)
10836 return error_mark_node
;
10839 decl
= do_friend (ctype
, unqualified_id
, decl
,
10845 return error_mark_node
;
10848 /* Structure field. It may not be a function, except for C++. */
10850 if (decl
== NULL_TREE
)
10854 /* C++ allows static class members. All other work
10855 for this is done by grokfield. */
10856 decl
= build_lang_decl_loc (declarator
10857 ? declarator
->id_loc
10859 VAR_DECL
, unqualified_id
, type
);
10860 set_linkage_for_static_data_member (decl
);
10861 /* Even if there is an in-class initialization, DECL
10862 is considered undefined until an out-of-class
10863 definition is provided. */
10864 DECL_EXTERNAL (decl
) = 1;
10868 CP_DECL_THREAD_LOCAL_P (decl
) = true;
10869 if (!processing_template_decl
)
10870 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10871 if (declspecs
->gnu_thread_keyword_p
)
10872 SET_DECL_GNU_TLS_P (decl
);
10875 if (constexpr_p
&& !initialized
)
10877 error ("constexpr static data member %qD must have an "
10878 "initializer", decl
);
10879 constexpr_p
= false;
10886 error ("non-static data member %qE declared %<constexpr%>",
10888 constexpr_p
= false;
10890 decl
= build_decl (input_location
,
10891 FIELD_DECL
, unqualified_id
, type
);
10892 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10893 if (bitfield
&& !unqualified_id
)
10894 TREE_NO_WARNING (decl
) = 1;
10896 if (storage_class
== sc_mutable
)
10898 DECL_MUTABLE_P (decl
) = 1;
10899 storage_class
= sc_none
;
10904 /* An attempt is being made to initialize a non-static
10905 member. This is new in C++11. */
10906 maybe_warn_cpp0x (CPP0X_NSDMI
);
10908 /* If this has been parsed with static storage class, but
10909 errors forced staticp to be cleared, ensure NSDMI is
10911 if (declspecs
->storage_class
== sc_static
)
10912 DECL_INITIAL (decl
) = error_mark_node
;
10916 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10917 memfn_quals
!= TYPE_UNQUALIFIED
,
10918 inlinep
, friendp
, raises
!= NULL_TREE
);
10921 else if (TREE_CODE (type
) == FUNCTION_TYPE
10922 || TREE_CODE (type
) == METHOD_TYPE
)
10924 tree original_name
;
10927 if (!unqualified_id
)
10928 return error_mark_node
;
10930 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10931 original_name
= dname
;
10933 original_name
= unqualified_id
;
10935 if (storage_class
== sc_auto
)
10936 error ("storage class %<auto%> invalid for function %qs", name
);
10937 else if (storage_class
== sc_register
)
10938 error ("storage class %<register%> invalid for function %qs", name
);
10941 if (declspecs
->gnu_thread_keyword_p
)
10942 error ("storage class %<__thread%> invalid for function %qs",
10945 error ("storage class %<thread_local%> invalid for function %qs",
10949 if (virt_specifiers
)
10950 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10951 /* Function declaration not at top level.
10952 Storage classes other than `extern' are not allowed
10953 and `extern' makes no difference. */
10954 if (! toplevel_bindings_p ()
10955 && (storage_class
== sc_static
10956 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10959 if (storage_class
== sc_static
)
10960 pedwarn (input_location
, OPT_Wpedantic
,
10961 "%<static%> specified invalid for function %qs "
10962 "declared out of global scope", name
);
10964 pedwarn (input_location
, OPT_Wpedantic
,
10965 "%<inline%> specifier invalid for function %qs "
10966 "declared out of global scope", name
);
10969 if (ctype
== NULL_TREE
)
10973 error ("virtual non-class function %qs", name
);
10976 else if (sfk
== sfk_constructor
10977 || sfk
== sfk_destructor
)
10979 error (funcdef_flag
10980 ? G_("%qs defined in a non-class scope")
10981 : G_("%qs declared in a non-class scope"), name
);
10986 /* Record whether the function is public. */
10987 publicp
= (ctype
!= NULL_TREE
10988 || storage_class
!= sc_static
);
10990 if (late_return_type_p
)
10991 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10993 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10994 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10996 publicp
, inlinep
| (2 * constexpr_p
),
10997 initialized
== SD_DELETED
, sfk
,
10999 template_count
, in_namespace
, attrlist
,
11000 declarator
->id_loc
);
11001 if (decl
== NULL_TREE
)
11002 return error_mark_node
;
11006 int invalid_static
= 0;
11008 /* Don't allow a static member function in a class, and forbid
11009 declaring main to be static. */
11010 if (TREE_CODE (type
) == METHOD_TYPE
)
11012 permerror (input_location
, "cannot declare member function %qD to have "
11013 "static linkage", decl
);
11014 invalid_static
= 1;
11016 else if (current_function_decl
)
11018 /* FIXME need arm citation */
11019 error ("cannot declare static function inside another function");
11020 invalid_static
= 1;
11023 if (invalid_static
)
11026 storage_class
= sc_none
;
11032 /* It's a variable. */
11034 /* An uninitialized decl with `extern' is a reference. */
11035 decl
= grokvardecl (type
, dname
, unqualified_id
,
11038 (type_quals
& TYPE_QUAL_CONST
) != 0,
11040 ctype
? ctype
: in_namespace
);
11041 if (decl
== NULL_TREE
)
11042 return error_mark_node
;
11044 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11045 memfn_quals
!= TYPE_UNQUALIFIED
,
11046 inlinep
, friendp
, raises
!= NULL_TREE
);
11050 DECL_CONTEXT (decl
) = ctype
;
11053 permerror (input_location
, "%<static%> may not be used when defining "
11054 "(as opposed to declaring) a static data member");
11056 storage_class
= sc_none
;
11058 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11060 error ("static member %qD declared %<register%>", decl
);
11061 storage_class
= sc_none
;
11063 if (storage_class
== sc_extern
&& pedantic
)
11065 pedwarn (input_location
, OPT_Wpedantic
,
11066 "cannot explicitly declare member %q#D to have "
11067 "extern linkage", decl
);
11068 storage_class
= sc_none
;
11071 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11073 error ("declaration of constexpr variable %qD is not a definition",
11075 constexpr_p
= false;
11079 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11081 if (toplevel_bindings_p ())
11083 /* It's common practice (and completely valid) to have a const
11084 be initialized and declared extern. */
11085 if (!(type_quals
& TYPE_QUAL_CONST
))
11086 warning (0, "%qs initialized and declared %<extern%>", name
);
11090 error ("%qs has both %<extern%> and initializer", name
);
11091 return error_mark_node
;
11095 /* Record `register' declaration for warnings on &
11096 and in case doing stupid register allocation. */
11098 if (storage_class
== sc_register
)
11099 DECL_REGISTER (decl
) = 1;
11100 else if (storage_class
== sc_extern
)
11101 DECL_THIS_EXTERN (decl
) = 1;
11102 else if (storage_class
== sc_static
)
11103 DECL_THIS_STATIC (decl
) = 1;
11105 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11106 if (constexpr_p
&& VAR_P (decl
))
11107 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11109 /* Record constancy and volatility on the DECL itself . There's
11110 no need to do this when processing a template; we'll do this
11111 for the instantiated declaration based on the type of DECL. */
11112 if (!processing_template_decl
)
11113 cp_apply_type_quals_to_decl (type_quals
, decl
);
11119 /* Subroutine of start_function. Ensure that each of the parameter
11120 types (as listed in PARMS) is complete, as is required for a
11121 function definition. */
11124 require_complete_types_for_parms (tree parms
)
11126 for (; parms
; parms
= DECL_CHAIN (parms
))
11128 if (dependent_type_p (TREE_TYPE (parms
)))
11130 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11131 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11133 relayout_decl (parms
);
11134 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11137 /* grokparms or complete_type_or_else will have already issued
11139 TREE_TYPE (parms
) = error_mark_node
;
11143 /* Returns nonzero if T is a local variable. */
11146 local_variable_p (const_tree t
)
11149 /* A VAR_DECL with a context that is a _TYPE is a static data
11151 && !TYPE_P (CP_DECL_CONTEXT (t
))
11152 /* Any other non-local variable must be at namespace scope. */
11153 && !DECL_NAMESPACE_SCOPE_P (t
))
11154 || (TREE_CODE (t
) == PARM_DECL
))
11160 /* Like local_variable_p, but suitable for use as a tree-walking
11164 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11167 if (local_variable_p (*tp
)
11168 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11170 else if (TYPE_P (*tp
))
11171 *walk_subtrees
= 0;
11176 /* Check that ARG, which is a default-argument expression for a
11177 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11178 something goes wrong. DECL may also be a _TYPE node, rather than a
11179 DECL, if there is no DECL available. */
11182 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11187 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11188 /* We get a DEFAULT_ARG when looking at an in-class declaration
11189 with a default argument. Ignore the argument for now; we'll
11190 deal with it after the class is complete. */
11199 decl_type
= TREE_TYPE (decl
);
11201 if (arg
== error_mark_node
11202 || decl
== error_mark_node
11203 || TREE_TYPE (arg
) == error_mark_node
11204 || decl_type
== error_mark_node
)
11205 /* Something already went wrong. There's no need to check
11207 return error_mark_node
;
11209 /* [dcl.fct.default]
11211 A default argument expression is implicitly converted to the
11213 ++cp_unevaluated_operand
;
11214 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11216 --cp_unevaluated_operand
;
11218 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
11220 if (TYPE_PTR_OR_PTRMEM_P (decl_type
)
11221 && null_ptr_cst_p (arg
))
11222 return nullptr_node
;
11224 /* [dcl.fct.default]
11226 Local variables shall not be used in default argument
11229 The keyword `this' shall not be used in a default argument of a
11230 member function. */
11231 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11234 if (complain
& tf_warning_or_error
)
11236 if (DECL_NAME (var
) == this_identifier
)
11237 permerror (input_location
, "default argument %qE uses %qD",
11240 error ("default argument %qE uses local variable %qD", arg
, var
);
11242 return error_mark_node
;
11249 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11252 type_is_deprecated (tree type
)
11254 enum tree_code code
;
11255 if (TREE_DEPRECATED (type
))
11257 if (TYPE_NAME (type
)
11258 && TREE_DEPRECATED (TYPE_NAME (type
)))
11261 /* Do warn about using typedefs to a deprecated class. */
11262 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11263 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11265 code
= TREE_CODE (type
);
11267 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11268 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11269 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11270 return type_is_deprecated (TREE_TYPE (type
));
11272 if (TYPE_PTRMEMFUNC_P (type
))
11273 return type_is_deprecated
11274 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11279 /* Decode the list of parameter types for a function type.
11280 Given the list of things declared inside the parens,
11281 return a list of types.
11283 If this parameter does not end with an ellipsis, we append
11286 *PARMS is set to the chain of PARM_DECLs created. */
11289 grokparms (tree parmlist
, tree
*parms
)
11291 tree result
= NULL_TREE
;
11292 tree decls
= NULL_TREE
;
11296 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11298 tree type
= NULL_TREE
;
11299 tree init
= TREE_PURPOSE (parm
);
11300 tree decl
= TREE_VALUE (parm
);
11301 const char *errmsg
;
11303 if (parm
== void_list_node
)
11306 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11309 type
= TREE_TYPE (decl
);
11310 if (VOID_TYPE_P (type
))
11312 if (same_type_p (type
, void_type_node
)
11314 && !DECL_NAME (decl
) && !result
11315 && TREE_CHAIN (parm
) == void_list_node
)
11316 /* DR 577: A parameter list consisting of a single
11317 unnamed parameter of non-dependent type 'void'. */
11319 else if (cv_qualified_p (type
))
11320 error_at (DECL_SOURCE_LOCATION (decl
),
11321 "invalid use of cv-qualified type %qT in "
11322 "parameter declaration", type
);
11324 error_at (DECL_SOURCE_LOCATION (decl
),
11325 "invalid use of type %<void%> in parameter "
11327 /* It's not a good idea to actually create parameters of
11328 type `void'; other parts of the compiler assume that a
11329 void type terminates the parameter list. */
11330 type
= error_mark_node
;
11331 TREE_TYPE (decl
) = error_mark_node
;
11334 if (type
!= error_mark_node
11335 && TYPE_FOR_JAVA (type
)
11336 && MAYBE_CLASS_TYPE_P (type
))
11338 error ("parameter %qD has Java class type", decl
);
11339 type
= error_mark_node
;
11340 TREE_TYPE (decl
) = error_mark_node
;
11344 if (type
!= error_mark_node
11345 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11348 type
= error_mark_node
;
11349 TREE_TYPE (decl
) = error_mark_node
;
11352 if (type
!= error_mark_node
)
11354 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11356 tree deptype
= type_is_deprecated (type
);
11358 warn_deprecated_use (deptype
, NULL_TREE
);
11361 /* Top-level qualifiers on the parameters are
11362 ignored for function types. */
11363 type
= cp_build_qualified_type (type
, 0);
11364 if (TREE_CODE (type
) == METHOD_TYPE
)
11366 error ("parameter %qD invalidly declared method type", decl
);
11367 type
= build_pointer_type (type
);
11368 TREE_TYPE (decl
) = type
;
11370 else if (abstract_virtuals_error (decl
, type
))
11371 any_error
= 1; /* Seems like a good idea. */
11372 else if (POINTER_TYPE_P (type
))
11374 /* [dcl.fct]/6, parameter types cannot contain pointers
11375 (references) to arrays of unknown bound. */
11376 tree t
= TREE_TYPE (type
);
11377 int ptr
= TYPE_PTR_P (type
);
11381 if (TYPE_PTR_P (t
))
11383 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11385 else if (!TYPE_DOMAIN (t
))
11389 if (TREE_CODE (t
) == ARRAY_TYPE
)
11391 ? G_("parameter %qD includes pointer to array of "
11392 "unknown bound %qT")
11393 : G_("parameter %qD includes reference to array of "
11394 "unknown bound %qT"),
11400 else if (init
&& !processing_template_decl
)
11401 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11404 DECL_CHAIN (decl
) = decls
;
11406 result
= tree_cons (init
, type
, result
);
11408 decls
= nreverse (decls
);
11409 result
= nreverse (result
);
11411 result
= chainon (result
, void_list_node
);
11418 /* D is a constructor or overloaded `operator='.
11420 Let T be the class in which D is declared. Then, this function
11423 -1 if D's is an ill-formed constructor or copy assignment operator
11424 whose first parameter is of type `T'.
11425 0 if D is not a copy constructor or copy assignment
11427 1 if D is a copy constructor or copy assignment operator whose
11428 first parameter is a reference to non-const qualified T.
11429 2 if D is a copy constructor or copy assignment operator whose
11430 first parameter is a reference to const qualified T.
11432 This function can be used as a predicate. Positive values indicate
11433 a copy constructor and nonzero values indicate a copy assignment
11437 copy_fn_p (const_tree d
)
11443 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11445 if (TREE_CODE (d
) == TEMPLATE_DECL
11446 || (DECL_TEMPLATE_INFO (d
)
11447 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11448 /* Instantiations of template member functions are never copy
11449 functions. Note that member functions of templated classes are
11450 represented as template functions internally, and we must
11451 accept those as copy functions. */
11454 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11458 arg_type
= TREE_VALUE (args
);
11459 if (arg_type
== error_mark_node
)
11462 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11464 /* Pass by value copy assignment operator. */
11467 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11468 && !TYPE_REF_IS_RVALUE (arg_type
)
11469 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11471 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11477 args
= TREE_CHAIN (args
);
11479 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11480 /* There are more non-optional args. */
11486 /* D is a constructor or overloaded `operator='.
11488 Let T be the class in which D is declared. Then, this function
11489 returns true when D is a move constructor or move assignment
11490 operator, false otherwise. */
11493 move_fn_p (const_tree d
)
11495 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11497 if (cxx_dialect
== cxx98
)
11498 /* There are no move constructors if we are in C++98 mode. */
11501 if (TREE_CODE (d
) == TEMPLATE_DECL
11502 || (DECL_TEMPLATE_INFO (d
)
11503 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11504 /* Instantiations of template member functions are never move
11505 functions. Note that member functions of templated classes are
11506 represented as template functions internally, and we must
11507 accept those as move functions. */
11510 return move_signature_fn_p (d
);
11513 /* D is a constructor or overloaded `operator='.
11515 Then, this function returns true when D has the same signature as a move
11516 constructor or move assignment operator (because either it is such a
11517 ctor/op= or it is a template specialization with the same signature),
11518 false otherwise. */
11521 move_signature_fn_p (const_tree d
)
11525 bool result
= false;
11527 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11531 arg_type
= TREE_VALUE (args
);
11532 if (arg_type
== error_mark_node
)
11535 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11536 && TYPE_REF_IS_RVALUE (arg_type
)
11537 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11541 args
= TREE_CHAIN (args
);
11543 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11544 /* There are more non-optional args. */
11550 /* Remember any special properties of member function DECL. */
11553 grok_special_member_properties (tree decl
)
11557 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11560 class_type
= DECL_CONTEXT (decl
);
11561 if (DECL_CONSTRUCTOR_P (decl
))
11563 int ctor
= copy_fn_p (decl
);
11565 if (!DECL_ARTIFICIAL (decl
))
11566 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11572 A non-template constructor for class X is a copy
11573 constructor if its first parameter is of type X&, const
11574 X&, volatile X& or const volatile X&, and either there
11575 are no other parameters or else all other parameters have
11576 default arguments. */
11577 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11578 if (user_provided_p (decl
))
11579 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11581 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11583 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11584 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11585 else if (move_fn_p (decl
) && user_provided_p (decl
))
11586 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11587 else if (is_list_ctor (decl
))
11588 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11590 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11591 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11592 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11594 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11598 A non-template assignment operator for class X is a copy
11599 assignment operator if its parameter is of type X, X&, const
11600 X&, volatile X& or const volatile X&. */
11602 int assop
= copy_fn_p (decl
);
11606 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11607 if (user_provided_p (decl
))
11608 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11610 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11612 else if (move_fn_p (decl
) && user_provided_p (decl
))
11613 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11615 /* Destructors are handled in check_methods. */
11618 /* Check a constructor DECL has the correct form. Complains
11619 if the class has a constructor of the form X(X). */
11622 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11624 int ctor_parm
= copy_fn_p (decl
);
11630 A declaration of a constructor for a class X is ill-formed if
11631 its first parameter is of type (optionally cv-qualified) X
11632 and either there are no other parameters or else all other
11633 parameters have default arguments.
11635 We *don't* complain about member template instantiations that
11636 have this form, though; they can occur as we try to decide
11637 what constructor to use during overload resolution. Since
11638 overload resolution will never prefer such a constructor to
11639 the non-template copy constructor (which is either explicitly
11640 or implicitly defined), there's no need to worry about their
11641 existence. Theoretically, they should never even be
11642 instantiated, but that's hard to forestall. */
11643 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11651 /* An operator with this code is unary, but can also be binary. */
11654 ambi_op_p (enum tree_code code
)
11656 return (code
== INDIRECT_REF
11657 || code
== ADDR_EXPR
11658 || code
== UNARY_PLUS_EXPR
11659 || code
== NEGATE_EXPR
11660 || code
== PREINCREMENT_EXPR
11661 || code
== PREDECREMENT_EXPR
);
11664 /* An operator with this name can only be unary. */
11667 unary_op_p (enum tree_code code
)
11669 return (code
== TRUTH_NOT_EXPR
11670 || code
== BIT_NOT_EXPR
11671 || code
== COMPONENT_REF
11672 || code
== TYPE_EXPR
);
11675 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11676 errors are issued for invalid declarations. */
11679 grok_op_properties (tree decl
, bool complain
)
11681 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11683 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11684 tree name
= DECL_NAME (decl
);
11685 enum tree_code operator_code
;
11690 /* Count the number of arguments and check for ellipsis. */
11691 for (argtype
= argtypes
, arity
= 0;
11692 argtype
&& argtype
!= void_list_node
;
11693 argtype
= TREE_CHAIN (argtype
))
11695 ellipsis_p
= !argtype
;
11697 class_type
= DECL_CONTEXT (decl
);
11698 if (class_type
&& !CLASS_TYPE_P (class_type
))
11699 class_type
= NULL_TREE
;
11701 if (DECL_CONV_FN_P (decl
))
11702 operator_code
= TYPE_EXPR
;
11706 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11707 if (ansi_opname (CODE) == name) \
11709 operator_code = (CODE); \
11712 else if (ansi_assopname (CODE) == name) \
11714 operator_code = (CODE); \
11715 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11719 #include "operators.def"
11720 #undef DEF_OPERATOR
11722 gcc_unreachable ();
11725 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11726 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11729 switch (operator_code
)
11732 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11736 TYPE_GETS_DELETE (class_type
) |= 1;
11740 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11743 case VEC_DELETE_EXPR
:
11744 TYPE_GETS_DELETE (class_type
) |= 2;
11751 /* [basic.std.dynamic.allocation]/1:
11753 A program is ill-formed if an allocation function is declared
11754 in a namespace scope other than global scope or declared static
11757 The same also holds true for deallocation functions. */
11758 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11759 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11761 if (DECL_NAMESPACE_SCOPE_P (decl
))
11763 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11765 error ("%qD may not be declared within a namespace", decl
);
11768 else if (!TREE_PUBLIC (decl
))
11770 error ("%qD may not be declared as static", decl
);
11776 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11778 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11779 DECL_IS_OPERATOR_NEW (decl
) = 1;
11781 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11782 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11785 /* An operator function must either be a non-static member function
11786 or have at least one parameter of a class, a reference to a class,
11787 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11788 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11790 if (operator_code
== TYPE_EXPR
11791 || operator_code
== CALL_EXPR
11792 || operator_code
== COMPONENT_REF
11793 || operator_code
== ARRAY_REF
11794 || operator_code
== NOP_EXPR
)
11796 error ("%qD must be a nonstatic member function", decl
);
11803 if (DECL_STATIC_FUNCTION_P (decl
))
11805 error ("%qD must be either a non-static member "
11806 "function or a non-member function", decl
);
11810 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11812 tree arg
= non_reference (TREE_VALUE (p
));
11813 if (arg
== error_mark_node
)
11816 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11817 because these checks are performed even on
11818 template functions. */
11819 if (MAYBE_CLASS_TYPE_P (arg
)
11820 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11824 if (!p
|| p
== void_list_node
)
11827 error ("%qD must have an argument of class or "
11828 "enumerated type", decl
);
11834 /* There are no restrictions on the arguments to an overloaded
11836 if (operator_code
== CALL_EXPR
)
11839 /* Warn about conversion operators that will never be used. */
11840 if (IDENTIFIER_TYPENAME_P (name
)
11841 && ! DECL_TEMPLATE_INFO (decl
)
11843 /* Warn only declaring the function; there is no need to
11844 warn again about out-of-class definitions. */
11845 && class_type
== current_class_type
)
11847 tree t
= TREE_TYPE (name
);
11848 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11851 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11853 if (VOID_TYPE_P (t
))
11854 warning (OPT_Wconversion
,
11856 ? G_("conversion to a reference to void "
11857 "will never use a type conversion operator")
11858 : G_("conversion to void "
11859 "will never use a type conversion operator"));
11860 else if (class_type
)
11862 if (t
== class_type
)
11863 warning (OPT_Wconversion
,
11865 ? G_("conversion to a reference to the same type "
11866 "will never use a type conversion operator")
11867 : G_("conversion to the same type "
11868 "will never use a type conversion operator"));
11869 /* Don't force t to be complete here. */
11870 else if (MAYBE_CLASS_TYPE_P (t
)
11871 && COMPLETE_TYPE_P (t
)
11872 && DERIVED_FROM_P (t
, class_type
))
11873 warning (OPT_Wconversion
,
11875 ? G_("conversion to a reference to a base class "
11876 "will never use a type conversion operator")
11877 : G_("conversion to a base class "
11878 "will never use a type conversion operator"));
11883 if (operator_code
== COND_EXPR
)
11886 error ("ISO C++ prohibits overloading operator ?:");
11889 else if (ellipsis_p
)
11891 error ("%qD must not have variable number of arguments", decl
);
11894 else if (ambi_op_p (operator_code
))
11897 /* We pick the one-argument operator codes by default, so
11898 we don't have to change anything. */
11900 else if (arity
== 2)
11902 /* If we thought this was a unary operator, we now know
11903 it to be a binary operator. */
11904 switch (operator_code
)
11907 operator_code
= MULT_EXPR
;
11911 operator_code
= BIT_AND_EXPR
;
11914 case UNARY_PLUS_EXPR
:
11915 operator_code
= PLUS_EXPR
;
11919 operator_code
= MINUS_EXPR
;
11922 case PREINCREMENT_EXPR
:
11923 operator_code
= POSTINCREMENT_EXPR
;
11926 case PREDECREMENT_EXPR
:
11927 operator_code
= POSTDECREMENT_EXPR
;
11931 gcc_unreachable ();
11934 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11936 if ((operator_code
== POSTINCREMENT_EXPR
11937 || operator_code
== POSTDECREMENT_EXPR
)
11938 && ! processing_template_decl
11939 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11942 error ("postfix %qD must take %<int%> as its argument",
11945 error ("postfix %qD must take %<int%> as its second "
11953 error ("%qD must take either zero or one argument", decl
);
11955 error ("%qD must take either one or two arguments", decl
);
11959 /* More Effective C++ rule 6. */
11961 && (operator_code
== POSTINCREMENT_EXPR
11962 || operator_code
== POSTDECREMENT_EXPR
11963 || operator_code
== PREINCREMENT_EXPR
11964 || operator_code
== PREDECREMENT_EXPR
))
11966 tree arg
= TREE_VALUE (argtypes
);
11967 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11968 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11969 arg
= TREE_TYPE (arg
);
11970 arg
= TYPE_MAIN_VARIANT (arg
);
11971 if (operator_code
== PREINCREMENT_EXPR
11972 || operator_code
== PREDECREMENT_EXPR
)
11974 if (TREE_CODE (ret
) != REFERENCE_TYPE
11975 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11977 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11978 build_reference_type (arg
));
11982 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11983 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11987 else if (unary_op_p (operator_code
))
11992 error ("%qD must take %<void%>", decl
);
11994 error ("%qD must take exactly one argument", decl
);
11998 else /* if (binary_op_p (operator_code)) */
12003 error ("%qD must take exactly one argument", decl
);
12005 error ("%qD must take exactly two arguments", decl
);
12009 /* More Effective C++ rule 7. */
12011 && (operator_code
== TRUTH_ANDIF_EXPR
12012 || operator_code
== TRUTH_ORIF_EXPR
12013 || operator_code
== COMPOUND_EXPR
))
12014 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12018 /* Effective C++ rule 23. */
12021 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12022 && (operator_code
== PLUS_EXPR
12023 || operator_code
== MINUS_EXPR
12024 || operator_code
== TRUNC_DIV_EXPR
12025 || operator_code
== MULT_EXPR
12026 || operator_code
== TRUNC_MOD_EXPR
)
12027 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12028 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12030 /* [over.oper]/8 */
12031 for (; argtypes
&& argtypes
!= void_list_node
;
12032 argtypes
= TREE_CHAIN (argtypes
))
12033 if (TREE_PURPOSE (argtypes
))
12035 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12036 if (operator_code
== POSTINCREMENT_EXPR
12037 || operator_code
== POSTDECREMENT_EXPR
)
12039 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12044 error ("%qD cannot have default arguments", decl
);
12052 /* Return a string giving the keyword associate with CODE. */
12054 static const char *
12055 tag_name (enum tag_types code
)
12067 case typename_type
:
12070 gcc_unreachable ();
12074 /* Name lookup in an elaborated-type-specifier (after the keyword
12075 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12076 elaborated-type-specifier is invalid, issue a diagnostic and return
12077 error_mark_node; otherwise, return the *_TYPE to which it referred.
12078 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12081 check_elaborated_type_specifier (enum tag_types tag_code
,
12083 bool allow_template_p
)
12089 struct S { struct S *p; };
12091 name lookup will find the TYPE_DECL for the implicit "S::S"
12092 typedef. Adjust for that here. */
12093 if (DECL_SELF_REFERENCE_P (decl
))
12094 decl
= TYPE_NAME (TREE_TYPE (decl
));
12096 type
= TREE_TYPE (decl
);
12098 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12099 is false for this case as well. */
12100 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12102 error ("using template type parameter %qT after %qs",
12103 type
, tag_name (tag_code
));
12104 return error_mark_node
;
12106 /* Accept template template parameters. */
12107 else if (allow_template_p
12108 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12109 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12113 If the identifier resolves to a typedef-name or the
12114 simple-template-id resolves to an alias template
12115 specialization, the elaborated-type-specifier is ill-formed.
12117 In other words, the only legitimate declaration to use in the
12118 elaborated type specifier is the implicit typedef created when
12119 the type is declared. */
12120 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12121 && !DECL_SELF_REFERENCE_P (decl
)
12122 && tag_code
!= typename_type
)
12124 if (alias_template_specialization_p (type
))
12125 error ("using alias template specialization %qT after %qs",
12126 type
, tag_name (tag_code
));
12128 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12129 inform (DECL_SOURCE_LOCATION (decl
),
12130 "%qD has a previous declaration here", decl
);
12131 return error_mark_node
;
12133 else if (TREE_CODE (type
) != RECORD_TYPE
12134 && TREE_CODE (type
) != UNION_TYPE
12135 && tag_code
!= enum_type
12136 && tag_code
!= typename_type
)
12138 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12139 inform (input_location
, "%q+T has a previous declaration here", type
);
12140 return error_mark_node
;
12142 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12143 && tag_code
== enum_type
)
12145 error ("%qT referred to as enum", type
);
12146 inform (input_location
, "%q+T has a previous declaration here", type
);
12147 return error_mark_node
;
12149 else if (!allow_template_p
12150 && TREE_CODE (type
) == RECORD_TYPE
12151 && CLASSTYPE_IS_TEMPLATE (type
))
12153 /* If a class template appears as elaborated type specifier
12154 without a template header such as:
12156 template <class T> class C {};
12157 void f(class C); // No template header here
12159 then the required template argument is missing. */
12160 error ("template argument required for %<%s %T%>",
12161 tag_name (tag_code
),
12162 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12163 return error_mark_node
;
12169 /* Lookup NAME in elaborate type specifier in scope according to
12170 SCOPE and issue diagnostics if necessary.
12171 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12172 found, and ERROR_MARK_NODE for type error. */
12175 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12176 tag_scope scope
, bool template_header_p
)
12180 if (scope
== ts_global
)
12182 /* First try ordinary name lookup, ignoring hidden class name
12183 injected via friend declaration. */
12184 decl
= lookup_name_prefer_type (name
, 2);
12185 decl
= strip_using_decl (decl
);
12186 /* If that fails, the name will be placed in the smallest
12187 non-class, non-function-prototype scope according to 3.3.1/5.
12188 We may already have a hidden name declared as friend in this
12189 scope. So lookup again but not ignoring hidden names.
12190 If we find one, that name will be made visible rather than
12191 creating a new tag. */
12193 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12196 decl
= lookup_type_scope (name
, scope
);
12199 && (DECL_CLASS_TEMPLATE_P (decl
)
12200 /* If scope is ts_current we're defining a class, so ignore a
12201 template template parameter. */
12202 || (scope
!= ts_current
12203 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12204 decl
= DECL_TEMPLATE_RESULT (decl
);
12206 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12208 /* Look for invalid nested type:
12212 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12214 error ("%qD has the same name as the class in which it is "
12217 return error_mark_node
;
12220 /* Two cases we need to consider when deciding if a class
12221 template is allowed as an elaborated type specifier:
12222 1. It is a self reference to its own class.
12223 2. It comes with a template header.
12227 template <class T> class C {
12228 class C *c1; // DECL_SELF_REFERENCE_P is true
12231 template <class U> class C; // template_header_p is true
12232 template <class T> class C<T>::D {
12233 class C *c2; // DECL_SELF_REFERENCE_P is true
12236 t
= check_elaborated_type_specifier (tag_code
,
12239 | DECL_SELF_REFERENCE_P (decl
));
12242 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12244 error ("reference to %qD is ambiguous", name
);
12245 print_candidates (decl
);
12246 return error_mark_node
;
12252 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12253 Define the tag as a forward-reference if it is not defined.
12255 If a declaration is given, process it here, and report an error if
12256 multiple declarations are not identical.
12258 SCOPE is TS_CURRENT when this is also a definition. Only look in
12259 the current frame for the name (since C++ allows new names in any
12260 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12261 declaration. Only look beginning from the current scope outward up
12262 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12264 TEMPLATE_HEADER_P is true when this declaration is preceded by
12265 a set of template parameters. */
12268 xref_tag_1 (enum tag_types tag_code
, tree name
,
12269 tag_scope orig_scope
, bool template_header_p
)
12271 enum tree_code code
;
12273 tree context
= NULL_TREE
;
12276 gcc_assert (identifier_p (name
));
12282 code
= RECORD_TYPE
;
12288 code
= ENUMERAL_TYPE
;
12291 gcc_unreachable ();
12294 if (orig_scope
== ts_lambda
)
12295 scope
= ts_current
;
12297 scope
= orig_scope
;
12299 /* In case of anonymous name, xref_tag is only called to
12300 make type node and push name. Name lookup is not required. */
12301 if (anon_aggrname_p (name
))
12304 t
= lookup_and_check_tag (tag_code
, name
,
12305 scope
, template_header_p
);
12307 if (t
== error_mark_node
)
12308 return error_mark_node
;
12310 if (scope
!= ts_current
&& t
&& current_class_type
12311 && template_class_depth (current_class_type
)
12312 && template_header_p
)
12314 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12317 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12318 definition of this tag. Since, in addition, we are currently
12319 processing a (member) template declaration of a template
12320 class, we must be very careful; consider:
12327 { template <class V>
12328 friend struct S1; };
12330 Here, the S2::S1 declaration should not be confused with the
12331 outer declaration. In particular, the inner version should
12332 have a template parameter of level 2, not level 1. This
12333 would be particularly important if the member declaration
12336 template <class V = U> friend struct S1;
12338 say, when we should tsubst into `U' when instantiating
12339 S2. On the other hand, when presented with:
12349 we must find the inner binding eventually. We
12350 accomplish this by making sure that the new type we
12351 create to represent this declaration has the right
12353 context
= TYPE_CONTEXT (t
);
12359 /* If no such tag is yet defined, create a forward-reference node
12360 and record it as the "definition".
12361 When a real declaration of this type is found,
12362 the forward-reference will be altered into a real type. */
12363 if (code
== ENUMERAL_TYPE
)
12365 error ("use of enum %q#D without previous declaration", name
);
12366 return error_mark_node
;
12370 t
= make_class_type (code
);
12371 TYPE_CONTEXT (t
) = context
;
12372 if (orig_scope
== ts_lambda
)
12373 /* Remember that we're declaring a lambda to avoid bogus errors
12374 in push_template_decl. */
12375 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12376 t
= pushtag (name
, t
, scope
);
12381 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12383 if (!redeclare_class_template (t
, current_template_parms
))
12384 return error_mark_node
;
12386 else if (!processing_template_decl
12387 && CLASS_TYPE_P (t
)
12388 && CLASSTYPE_IS_TEMPLATE (t
))
12390 error ("redeclaration of %qT as a non-template", t
);
12391 error ("previous declaration %q+D", t
);
12392 return error_mark_node
;
12395 /* Make injected friend class visible. */
12396 if (scope
!= ts_within_enclosing_non_class
12397 && hidden_name_p (TYPE_NAME (t
)))
12399 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12400 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12402 if (TYPE_TEMPLATE_INFO (t
))
12404 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12405 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12413 /* Wrapper for xref_tag_1. */
12416 xref_tag (enum tag_types tag_code
, tree name
,
12417 tag_scope scope
, bool template_header_p
)
12421 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12422 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12423 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12429 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12431 enum tag_types tag_kind
;
12433 if (TREE_CODE (old
) == RECORD_TYPE
)
12434 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12436 tag_kind
= union_type
;
12438 if (id
== NULL_TREE
)
12439 id
= TYPE_IDENTIFIER (old
);
12441 return xref_tag (tag_kind
, id
, scope
, false);
12444 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12445 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12446 access_* node, and the TREE_VALUE is the type of the base-class.
12447 Non-NULL TREE_TYPE indicates virtual inheritance.
12449 Returns true if the binfo hierarchy was successfully created,
12450 false if an error was detected. */
12453 xref_basetypes (tree ref
, tree base_list
)
12456 tree binfo
, base_binfo
;
12457 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12458 unsigned max_bases
= 0; /* Maximum direct bases. */
12460 tree default_access
;
12461 tree igo_prev
; /* Track Inheritance Graph Order. */
12463 if (ref
== error_mark_node
)
12466 /* The base of a derived class is private by default, all others are
12468 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12469 && CLASSTYPE_DECLARED_CLASS (ref
)
12470 ? access_private_node
: access_public_node
);
12472 /* First, make sure that any templates in base-classes are
12473 instantiated. This ensures that if we call ourselves recursively
12474 we do not get confused about which classes are marked and which
12476 basep
= &base_list
;
12479 tree basetype
= TREE_VALUE (*basep
);
12481 /* The dependent_type_p call below should really be dependent_scope_p
12482 so that we give a hard error about using an incomplete type as a
12483 base, but we allow it with a pedwarn for backward
12485 if (processing_template_decl
12486 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12487 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12488 if (!dependent_type_p (basetype
)
12489 && !complete_type_or_else (basetype
, NULL
))
12490 /* An incomplete type. Remove it from the list. */
12491 *basep
= TREE_CHAIN (*basep
);
12495 if (TREE_TYPE (*basep
))
12497 if (CLASS_TYPE_P (basetype
))
12498 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12499 basep
= &TREE_CHAIN (*basep
);
12503 TYPE_MARKED_P (ref
) = 1;
12505 /* The binfo slot should be empty, unless this is an (ill-formed)
12507 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12509 error ("redefinition of %q#T", ref
);
12513 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12515 binfo
= make_tree_binfo (max_bases
);
12517 TYPE_BINFO (ref
) = binfo
;
12518 BINFO_OFFSET (binfo
) = size_zero_node
;
12519 BINFO_TYPE (binfo
) = ref
;
12521 /* Apply base-class info set up to the variants of this type. */
12522 fixup_type_variants (ref
);
12526 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12527 /* An aggregate cannot have baseclasses. */
12528 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12530 if (TREE_CODE (ref
) == UNION_TYPE
)
12532 error ("derived union %qT invalid", ref
);
12539 if (TYPE_FOR_JAVA (ref
))
12541 error ("Java class %qT cannot have multiple bases", ref
);
12548 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12550 if (TYPE_FOR_JAVA (ref
))
12552 error ("Java class %qT cannot have virtual bases", ref
);
12557 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12559 tree access
= TREE_PURPOSE (base_list
);
12560 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12561 tree basetype
= TREE_VALUE (base_list
);
12563 if (access
== access_default_node
)
12564 access
= default_access
;
12566 if (PACK_EXPANSION_P (basetype
))
12567 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12568 if (TREE_CODE (basetype
) == TYPE_DECL
)
12569 basetype
= TREE_TYPE (basetype
);
12570 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12572 error ("base type %qT fails to be a struct or class type",
12577 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12578 TYPE_FOR_JAVA (ref
) = 1;
12580 base_binfo
= NULL_TREE
;
12581 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12583 base_binfo
= TYPE_BINFO (basetype
);
12584 /* The original basetype could have been a typedef'd type. */
12585 basetype
= BINFO_TYPE (base_binfo
);
12587 /* Inherit flags from the base. */
12588 TYPE_HAS_NEW_OPERATOR (ref
)
12589 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12590 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12591 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12592 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12593 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12594 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12595 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12596 CLASSTYPE_REPEATED_BASE_P (ref
)
12597 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12600 /* We must do this test after we've seen through a typedef
12602 if (TYPE_MARKED_P (basetype
))
12604 if (basetype
== ref
)
12605 error ("recursive type %qT undefined", basetype
);
12607 error ("duplicate base type %qT invalid", basetype
);
12611 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12612 /* Regenerate the pack expansion for the bases. */
12613 basetype
= make_pack_expansion (basetype
);
12615 TYPE_MARKED_P (basetype
) = 1;
12617 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12618 &igo_prev
, via_virtual
);
12619 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12620 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12622 BINFO_BASE_APPEND (binfo
, base_binfo
);
12623 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12626 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12627 /* If we didn't get max_vbases vbases, we must have shared at
12628 least one of them, and are therefore diamond shaped. */
12629 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12631 /* Unmark all the types. */
12632 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12633 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12634 TYPE_MARKED_P (ref
) = 0;
12636 /* Now see if we have a repeated base type. */
12637 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12639 for (base_binfo
= binfo
; base_binfo
;
12640 base_binfo
= TREE_CHAIN (base_binfo
))
12642 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12644 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12647 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12649 for (base_binfo
= binfo
; base_binfo
;
12650 base_binfo
= TREE_CHAIN (base_binfo
))
12651 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12652 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12661 /* Copies the enum-related properties from type SRC to type DST.
12662 Used with the underlying type of an enum and the enum itself. */
12664 copy_type_enum (tree dst
, tree src
)
12667 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12669 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12670 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12671 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12672 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12673 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12674 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12675 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12676 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12677 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12681 /* Begin compiling the definition of an enumeration type.
12684 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12686 UNDERLYING_TYPE is the type that will be used as the storage for
12687 the enumeration type. This should be NULL_TREE if no storage type
12690 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12692 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12694 Returns the type object, as yet incomplete.
12695 Also records info about it so that build_enumerator
12696 may be used to declare the individual values as they are read. */
12699 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12700 bool scoped_enum_p
, bool *is_new
)
12702 tree prevtype
= NULL_TREE
;
12703 gcc_assert (identifier_p (name
));
12707 /* [C++0x dcl.enum]p5:
12709 If not explicitly specified, the underlying type of a scoped
12710 enumeration type is int. */
12711 if (!underlying_type
&& scoped_enum_p
)
12712 underlying_type
= integer_type_node
;
12714 if (underlying_type
)
12715 underlying_type
= cv_unqualified (underlying_type
);
12717 /* If this is the real definition for a previous forward reference,
12718 fill in the contents in the same object that used to be the
12719 forward reference. */
12721 enumtype
= lookup_and_check_tag (enum_type
, name
,
12722 /*tag_scope=*/ts_current
,
12723 /*template_header_p=*/false);
12725 /* In case of a template_decl, the only check that should be deferred
12726 to instantiation time is the comparison of underlying types. */
12727 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12729 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12731 error_at (input_location
, "scoped/unscoped mismatch "
12732 "in enum %q#T", enumtype
);
12733 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12734 "previous definition here");
12735 enumtype
= error_mark_node
;
12737 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12739 error_at (input_location
, "underlying type mismatch "
12740 "in enum %q#T", enumtype
);
12741 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12742 "previous definition here");
12743 enumtype
= error_mark_node
;
12745 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12746 && !dependent_type_p (underlying_type
)
12747 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12748 && !same_type_p (underlying_type
,
12749 ENUM_UNDERLYING_TYPE (enumtype
)))
12751 error_at (input_location
, "different underlying type "
12752 "in enum %q#T", enumtype
);
12753 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12754 "previous definition here");
12755 underlying_type
= NULL_TREE
;
12759 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12760 || processing_template_decl
)
12762 /* In case of error, make a dummy enum to allow parsing to
12764 if (enumtype
== error_mark_node
)
12766 name
= make_anon_name ();
12767 enumtype
= NULL_TREE
;
12770 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12771 of an opaque enum, or an opaque enum of an already defined
12772 enumeration (C++0x only).
12773 In any other case, it'll be NULL_TREE. */
12779 prevtype
= enumtype
;
12781 /* Do not push the decl more than once, unless we need to
12782 compare underlying types at instantiation time */
12784 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12785 || (underlying_type
12786 && dependent_type_p (underlying_type
))
12787 || (ENUM_UNDERLYING_TYPE (enumtype
)
12788 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12790 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12791 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12794 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12797 if (enumtype
== error_mark_node
)
12798 return error_mark_node
;
12800 /* The enum is considered opaque until the opening '{' of the
12801 enumerator list. */
12802 SET_OPAQUE_ENUM_P (enumtype
, true);
12803 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12806 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12808 if (underlying_type
)
12810 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12812 copy_type_enum (enumtype
, underlying_type
);
12813 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12815 else if (dependent_type_p (underlying_type
))
12816 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12818 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12819 underlying_type
, enumtype
);
12822 /* If into a template class, the returned enum is always the first
12823 declaration (opaque or not) seen. This way all the references to
12824 this type will be to the same declaration. The following ones are used
12825 only to check for definition errors. */
12826 if (prevtype
&& processing_template_decl
)
12832 /* After processing and defining all the values of an enumeration type,
12833 install their decls in the enumeration type.
12834 ENUMTYPE is the type object. */
12837 finish_enum_value_list (tree enumtype
)
12840 tree underlying_type
;
12843 tree minnode
, maxnode
;
12846 bool fixed_underlying_type_p
12847 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12849 /* We built up the VALUES in reverse order. */
12850 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12852 /* For an enum defined in a template, just set the type of the values;
12853 all further processing is postponed until the template is
12854 instantiated. We need to set the type so that tsubst of a CONST_DECL
12856 if (processing_template_decl
)
12858 for (values
= TYPE_VALUES (enumtype
);
12860 values
= TREE_CHAIN (values
))
12861 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12865 /* Determine the minimum and maximum values of the enumerators. */
12866 if (TYPE_VALUES (enumtype
))
12868 minnode
= maxnode
= NULL_TREE
;
12870 for (values
= TYPE_VALUES (enumtype
);
12872 values
= TREE_CHAIN (values
))
12874 decl
= TREE_VALUE (values
);
12876 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12877 each enumerator has the type of its enumeration. Prior to the
12878 closing brace, the type of each enumerator is the type of its
12879 initializing value. */
12880 TREE_TYPE (decl
) = enumtype
;
12882 /* Update the minimum and maximum values, if appropriate. */
12883 value
= DECL_INITIAL (decl
);
12884 if (value
== error_mark_node
)
12885 value
= integer_zero_node
;
12886 /* Figure out what the minimum and maximum values of the
12887 enumerators are. */
12889 minnode
= maxnode
= value
;
12890 else if (tree_int_cst_lt (maxnode
, value
))
12892 else if (tree_int_cst_lt (value
, minnode
))
12899 If the enumerator-list is empty, the underlying type is as if
12900 the enumeration had a single enumerator with value 0. */
12901 minnode
= maxnode
= integer_zero_node
;
12903 if (!fixed_underlying_type_p
)
12905 /* Compute the number of bits require to represent all values of the
12906 enumeration. We must do this before the type of MINNODE and
12907 MAXNODE are transformed, since tree_int_cst_min_precision relies
12908 on the TREE_TYPE of the value it is passed. */
12909 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12910 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12911 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12912 int precision
= MAX (lowprec
, highprec
);
12914 bool use_short_enum
;
12916 /* Determine the underlying type of the enumeration.
12920 The underlying type of an enumeration is an integral type that
12921 can represent all the enumerator values defined in the
12922 enumeration. It is implementation-defined which integral type is
12923 used as the underlying type for an enumeration except that the
12924 underlying type shall not be larger than int unless the value of
12925 an enumerator cannot fit in an int or unsigned int.
12927 We use "int" or an "unsigned int" as the underlying type, even if
12928 a smaller integral type would work, unless the user has
12929 explicitly requested that we use the smallest possible type. The
12930 user can request that for all enumerations with a command line
12931 flag, or for just one enumeration with an attribute. */
12933 use_short_enum
= flag_short_enums
12934 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12936 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12940 underlying_type
= integer_types
[itk
];
12941 if (underlying_type
!= NULL_TREE
12942 && TYPE_PRECISION (underlying_type
) >= precision
12943 && TYPE_SIGN (underlying_type
) == sgn
)
12946 if (itk
== itk_none
)
12950 IF no integral type can represent all the enumerator values, the
12951 enumeration is ill-formed. */
12952 error ("no integral type can represent all of the enumerator values "
12953 "for %qT", enumtype
);
12954 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12955 underlying_type
= integer_types
[itk_unsigned_long_long
];
12960 The value of sizeof() applied to an enumeration type, an object
12961 of an enumeration type, or an enumerator, is the value of sizeof()
12962 applied to the underlying type. */
12963 copy_type_enum (enumtype
, underlying_type
);
12965 /* Compute the minimum and maximum values for the type.
12969 For an enumeration where emin is the smallest enumerator and emax
12970 is the largest, the values of the enumeration are the values of the
12971 underlying type in the range bmin to bmax, where bmin and bmax are,
12972 respectively, the smallest and largest values of the smallest bit-
12973 field that can store emin and emax. */
12975 /* The middle-end currently assumes that types with TYPE_PRECISION
12976 narrower than their underlying type are suitably zero or sign
12977 extended to fill their mode. Similarly, it assumes that the front
12978 end assures that a value of a particular type must be within
12979 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12981 We used to set these fields based on bmin and bmax, but that led
12982 to invalid assumptions like optimizing away bounds checking. So
12983 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12984 TYPE_MAX_VALUE to the values for the mode above and only restrict
12985 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12986 ENUM_UNDERLYING_TYPE (enumtype
)
12987 = build_distinct_type_copy (underlying_type
);
12988 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12989 set_min_and_max_values_for_integral_type
12990 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12992 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12993 if (flag_strict_enums
)
12994 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12997 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12999 /* Convert each of the enumerators to the type of the underlying
13000 type of the enumeration. */
13001 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
13003 location_t saved_location
;
13005 decl
= TREE_VALUE (values
);
13006 saved_location
= input_location
;
13007 input_location
= DECL_SOURCE_LOCATION (decl
);
13008 if (fixed_underlying_type_p
)
13009 /* If the enumeration type has a fixed underlying type, we
13010 already checked all of the enumerator values. */
13011 value
= DECL_INITIAL (decl
);
13013 value
= perform_implicit_conversion (underlying_type
,
13014 DECL_INITIAL (decl
),
13015 tf_warning_or_error
);
13016 input_location
= saved_location
;
13018 /* Do not clobber shared ints. */
13019 value
= copy_node (value
);
13021 TREE_TYPE (value
) = enumtype
;
13022 DECL_INITIAL (decl
) = value
;
13025 /* Fix up all variant types of this enum type. */
13026 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13027 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13029 if (at_class_scope_p ()
13030 && COMPLETE_TYPE_P (current_class_type
)
13031 && UNSCOPED_ENUM_P (enumtype
))
13032 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13033 current_class_type
);
13035 /* Finish debugging output for this type. */
13036 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13039 /* Finishes the enum type. This is called only the first time an
13040 enumeration is seen, be it opaque or odinary.
13041 ENUMTYPE is the type object. */
13044 finish_enum (tree enumtype
)
13046 if (processing_template_decl
)
13048 if (at_function_scope_p ())
13049 add_stmt (build_min (TAG_DEFN
, enumtype
));
13053 /* If this is a forward declaration, there should not be any variants,
13054 though we can get a variant in the middle of an enum-specifier with
13055 wacky code like 'enum E { e = sizeof(const E*) };' */
13056 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13057 && (TYPE_VALUES (enumtype
)
13058 || !TYPE_NEXT_VARIANT (enumtype
)));
13061 /* Build and install a CONST_DECL for an enumeration constant of the
13062 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13063 Apply ATTRIBUTES if available. LOC is the location of NAME.
13064 Assignment of sequential values by default is handled here. */
13067 build_enumerator (tree name
, tree value
, tree enumtype
, tree attributes
,
13074 /* scalar_constant_value will pull out this expression, so make sure
13075 it's folded as appropriate. */
13076 if (processing_template_decl
)
13077 value
= fold_non_dependent_expr (value
);
13079 /* If the VALUE was erroneous, pretend it wasn't there; that will
13080 result in the enum being assigned the next value in sequence. */
13081 if (value
== error_mark_node
)
13084 /* Remove no-op casts from the value. */
13086 STRIP_TYPE_NOPS (value
);
13088 if (! processing_template_decl
)
13090 /* Validate and default VALUE. */
13091 if (value
!= NULL_TREE
)
13093 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13095 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13100 else if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
13101 (TREE_TYPE (value
)))
13102 value
= perform_implicit_conversion_flags
13103 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13104 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13106 if (value
== error_mark_node
)
13109 if (value
!= NULL_TREE
)
13111 value
= cxx_constant_value (value
);
13113 if (TREE_CODE (value
) != INTEGER_CST
13114 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13116 error ("enumerator value for %qD is not an integer constant",
13123 /* Default based on previous value. */
13124 if (value
== NULL_TREE
)
13126 if (TYPE_VALUES (enumtype
))
13131 /* C++03 7.2/4: If no initializer is specified for the first
13132 enumerator, the type is an unspecified integral
13133 type. Otherwise the type is the same as the type of the
13134 initializing value of the preceding enumerator unless the
13135 incremented value is not representable in that type, in
13136 which case the type is an unspecified integral type
13137 sufficient to contain the incremented value. */
13138 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13139 if (error_operand_p (prev_value
))
13140 value
= error_mark_node
;
13143 tree type
= TREE_TYPE (prev_value
);
13144 signop sgn
= TYPE_SIGN (type
);
13145 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13149 bool pos
= !wi::neg_p (wi
, sgn
);
13150 if (!wi::fits_to_tree_p (wi
, type
))
13153 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13155 type
= integer_types
[itk
];
13156 if (type
!= NULL_TREE
13157 && (pos
|| !TYPE_UNSIGNED (type
))
13158 && wi::fits_to_tree_p (wi
, type
))
13161 if (type
&& cxx_dialect
< cxx11
13162 && itk
> itk_unsigned_long
)
13163 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13164 incremented enumerator value is too large for %<unsigned long%>" : "\
13165 incremented enumerator value is too large for %<long%>");
13167 if (type
== NULL_TREE
)
13170 value
= wide_int_to_tree (type
, wi
);
13175 error ("overflow in enumeration values at %qD", name
);
13176 value
= error_mark_node
;
13181 value
= integer_zero_node
;
13184 /* Remove no-op casts from the value. */
13185 STRIP_TYPE_NOPS (value
);
13187 /* If the underlying type of the enum is fixed, check whether
13188 the enumerator values fits in the underlying type. If it
13189 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13190 if (ENUM_UNDERLYING_TYPE (enumtype
)
13192 && TREE_CODE (value
) == INTEGER_CST
)
13194 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13195 error ("enumerator value %E is outside the range of underlying "
13196 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13198 /* Convert the value to the appropriate type. */
13199 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13203 /* C++ associates enums with global, function, or class declarations. */
13204 context
= current_scope ();
13206 /* Build the actual enumeration constant. Note that the enumeration
13207 constants have the underlying type of the enum (if it is fixed)
13208 or the type of their initializer (if the underlying type of the
13209 enum is not fixed):
13213 If the underlying type is fixed, the type of each enumerator
13214 prior to the closing brace is the underlying type; if the
13215 initializing value of an enumerator cannot be represented by
13216 the underlying type, the program is ill-formed. If the
13217 underlying type is not fixed, the type of each enumerator is
13218 the type of its initializing value.
13220 If the underlying type is not fixed, it will be computed by
13221 finish_enum and we will reset the type of this enumerator. Of
13222 course, if we're processing a template, there may be no value. */
13223 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13225 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13227 DECL_CONTEXT (decl
) = enumtype
;
13228 TREE_CONSTANT (decl
) = 1;
13229 TREE_READONLY (decl
) = 1;
13230 DECL_INITIAL (decl
) = value
;
13233 cplus_decl_attributes (&decl
, attributes
, 0);
13235 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13236 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13237 on the TYPE_FIELDS list for `S'. (That's so that you can say
13238 things like `S::i' later.) */
13239 finish_member_declaration (decl
);
13243 /* Add this enumeration constant to the list for this type. */
13244 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13247 /* Look for an enumerator with the given NAME within the enumeration
13248 type ENUMTYPE. This routine is used primarily for qualified name
13249 lookup into an enumerator in C++0x, e.g.,
13251 enum class Color { Red, Green, Blue };
13253 Color color = Color::Red;
13255 Returns the value corresponding to the enumerator, or
13256 NULL_TREE if no such enumerator was found. */
13258 lookup_enumerator (tree enumtype
, tree name
)
13261 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13263 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13264 return e
? TREE_VALUE (e
) : NULL_TREE
;
13268 /* We're defining DECL. Make sure that its type is OK. */
13271 check_function_type (tree decl
, tree current_function_parms
)
13273 tree fntype
= TREE_TYPE (decl
);
13274 tree return_type
= complete_type (TREE_TYPE (fntype
));
13276 /* In a function definition, arg types must be complete. */
13277 require_complete_types_for_parms (current_function_parms
);
13279 if (dependent_type_p (return_type
)
13280 || type_uses_auto (return_type
))
13282 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13283 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13285 tree args
= TYPE_ARG_TYPES (fntype
);
13287 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13288 error ("return type %q#T is incomplete", return_type
);
13290 error ("return type has Java class type %q#T", return_type
);
13292 /* Make it return void instead. */
13293 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13294 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13296 TREE_CHAIN (args
));
13298 fntype
= build_function_type (void_type_node
, args
);
13300 = build_exception_variant (fntype
,
13301 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13302 fntype
= (cp_build_type_attribute_variant
13303 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13304 TREE_TYPE (decl
) = fntype
;
13307 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13310 /* Create the FUNCTION_DECL for a function definition.
13311 DECLSPECS and DECLARATOR are the parts of the declaration;
13312 they describe the function's name and the type it returns,
13313 but twisted together in a fashion that parallels the syntax of C.
13315 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13316 DECLARATOR is really the DECL for the function we are about to
13317 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13318 indicating that the function is an inline defined in-class.
13320 This function creates a binding context for the function body
13321 as well as setting up the FUNCTION_DECL in current_function_decl.
13323 For C++, we must first check whether that datum makes any sense.
13324 For example, "class A local_a(1,2);" means that variable local_a
13325 is an aggregate of type A, which should have a constructor
13326 applied to it with the argument list [1, 2].
13328 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13329 or may be a BLOCK if the function has been defined previously
13330 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13331 error_mark_node if the function has never been defined, or
13332 a BLOCK if the function has been defined somewhere. */
13335 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13337 tree ctype
= NULL_TREE
;
13340 int doing_friend
= 0;
13341 cp_binding_level
*bl
;
13342 tree current_function_parms
;
13343 struct c_fileinfo
*finfo
13344 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13345 bool honor_interface
;
13347 /* Sanity check. */
13348 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13349 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13351 fntype
= TREE_TYPE (decl1
);
13352 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13353 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13355 /* ISO C++ 11.4/5. A friend function defined in a class is in
13356 the (lexical) scope of the class in which it is defined. */
13357 if (!ctype
&& DECL_FRIEND_P (decl1
))
13359 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13361 /* CTYPE could be null here if we're dealing with a template;
13362 for example, `inline friend float foo()' inside a template
13363 will have no CTYPE set. */
13364 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13370 if (DECL_DECLARED_INLINE_P (decl1
)
13371 && lookup_attribute ("noinline", attrs
))
13372 warning (0, "inline function %q+D given attribute noinline", decl1
);
13374 /* Handle gnu_inline attribute. */
13375 if (GNU_INLINE_P (decl1
))
13377 DECL_EXTERNAL (decl1
) = 1;
13378 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13379 DECL_INTERFACE_KNOWN (decl1
) = 1;
13380 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13383 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13384 /* This is a constructor, we must ensure that any default args
13385 introduced by this definition are propagated to the clones
13386 now. The clones are used directly in overload resolution. */
13387 adjust_clone_args (decl1
);
13389 /* Sometimes we don't notice that a function is a static member, and
13390 build a METHOD_TYPE for it. Fix that up now. */
13391 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13392 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13394 /* Set up current_class_type, and enter the scope of the class, if
13397 push_nested_class (ctype
);
13398 else if (DECL_STATIC_FUNCTION_P (decl1
))
13399 push_nested_class (DECL_CONTEXT (decl1
));
13401 /* Now that we have entered the scope of the class, we must restore
13402 the bindings for any template parameters surrounding DECL1, if it
13403 is an inline member template. (Order is important; consider the
13404 case where a template parameter has the same name as a field of
13405 the class.) It is not until after this point that
13406 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13407 if (flags
& SF_INCLASS_INLINE
)
13408 maybe_begin_member_template_processing (decl1
);
13410 /* Effective C++ rule 15. */
13412 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13413 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13414 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13416 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13417 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13418 if (!DECL_INITIAL (decl1
))
13419 DECL_INITIAL (decl1
) = error_mark_node
;
13421 /* This function exists in static storage.
13422 (This does not mean `static' in the C sense!) */
13423 TREE_STATIC (decl1
) = 1;
13425 /* We must call push_template_decl after current_class_type is set
13426 up. (If we are processing inline definitions after exiting a
13427 class scope, current_class_type will be NULL_TREE until set above
13428 by push_nested_class.) */
13429 if (processing_template_decl
)
13431 tree newdecl1
= push_template_decl (decl1
);
13432 if (newdecl1
== error_mark_node
)
13434 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13435 pop_nested_class ();
13441 /* We are now in the scope of the function being defined. */
13442 current_function_decl
= decl1
;
13444 /* Save the parm names or decls from this function's declarator
13445 where store_parm_decls will find them. */
13446 current_function_parms
= DECL_ARGUMENTS (decl1
);
13448 /* Make sure the parameter and return types are reasonable. When
13449 you declare a function, these types can be incomplete, but they
13450 must be complete when you define the function. */
13451 check_function_type (decl1
, current_function_parms
);
13453 /* Build the return declaration for the function. */
13454 restype
= TREE_TYPE (fntype
);
13456 if (DECL_RESULT (decl1
) == NULL_TREE
)
13460 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13461 DECL_ARTIFICIAL (resdecl
) = 1;
13462 DECL_IGNORED_P (resdecl
) = 1;
13463 DECL_RESULT (decl1
) = resdecl
;
13465 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13468 /* Let the user know we're compiling this function. */
13469 announce_function (decl1
);
13471 /* Record the decl so that the function name is defined.
13472 If we already have a decl for this name, and it is a FUNCTION_DECL,
13473 use the old decl. */
13474 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13476 /* A specialization is not used to guide overload resolution. */
13477 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13478 && !(DECL_USE_TEMPLATE (decl1
) &&
13479 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13481 tree olddecl
= pushdecl (decl1
);
13483 if (olddecl
== error_mark_node
)
13484 /* If something went wrong when registering the declaration,
13485 use DECL1; we have to have a FUNCTION_DECL to use when
13486 parsing the body of the function. */
13490 /* Otherwise, OLDDECL is either a previous declaration
13491 of the same function or DECL1 itself. */
13493 if (warn_missing_declarations
13494 && olddecl
== decl1
13495 && !DECL_MAIN_P (decl1
)
13496 && TREE_PUBLIC (decl1
)
13497 && !DECL_DECLARED_INLINE_P (decl1
))
13501 /* Check whether DECL1 is in an anonymous
13503 for (context
= DECL_CONTEXT (decl1
);
13505 context
= DECL_CONTEXT (context
))
13507 if (TREE_CODE (context
) == NAMESPACE_DECL
13508 && DECL_NAME (context
) == NULL_TREE
)
13512 if (context
== NULL
)
13513 warning (OPT_Wmissing_declarations
,
13514 "no previous declaration for %q+D", decl1
);
13522 /* We need to set the DECL_CONTEXT. */
13523 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13524 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13526 fntype
= TREE_TYPE (decl1
);
13527 restype
= TREE_TYPE (fntype
);
13529 /* If #pragma weak applies, mark the decl appropriately now.
13530 The pragma only applies to global functions. Because
13531 determining whether or not the #pragma applies involves
13532 computing the mangled name for the declaration, we cannot
13533 apply the pragma until after we have merged this declaration
13534 with any previous declarations; if the original declaration
13535 has a linkage specification, that specification applies to
13536 the definition as well, and may affect the mangled name. */
13537 if (DECL_FILE_SCOPE_P (decl1
))
13538 maybe_apply_pragma_weak (decl1
);
13541 /* Reset this in case the call to pushdecl changed it. */
13542 current_function_decl
= decl1
;
13544 gcc_assert (DECL_INITIAL (decl1
));
13546 /* This function may already have been parsed, in which case just
13547 return; our caller will skip over the body without parsing. */
13548 if (DECL_INITIAL (decl1
) != error_mark_node
)
13551 /* Initialize RTL machinery. We cannot do this until
13552 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13553 even when processing a template; this is how we get
13554 CFUN set up, and our per-function variables initialized.
13555 FIXME factor out the non-RTL stuff. */
13556 bl
= current_binding_level
;
13557 allocate_struct_function (decl1
, processing_template_decl
);
13559 /* Initialize the language data structures. Whenever we start
13560 a new function, we destroy temporaries in the usual way. */
13561 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13562 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13563 current_binding_level
= bl
;
13565 if (!processing_template_decl
&& type_uses_auto (restype
))
13567 FNDECL_USED_AUTO (decl1
) = true;
13568 current_function_auto_return_pattern
= restype
;
13571 /* Start the statement-tree, start the tree now. */
13572 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13574 /* If we are (erroneously) defining a function that we have already
13575 defined before, wipe out what we knew before. */
13576 if (!DECL_PENDING_INLINE_P (decl1
))
13577 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13579 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13581 /* We know that this was set up by `grokclassfn'. We do not
13582 wait until `store_parm_decls', since evil parse errors may
13583 never get us to that point. Here we keep the consistency
13584 between `current_class_type' and `current_class_ptr'. */
13585 tree t
= DECL_ARGUMENTS (decl1
);
13587 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13588 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13590 cp_function_chain
->x_current_class_ref
13591 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13592 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13593 cp_function_chain
->x_current_class_ptr
= t
;
13595 /* Constructors and destructors need to know whether they're "in
13596 charge" of initializing virtual base classes. */
13597 t
= DECL_CHAIN (t
);
13598 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13600 current_in_charge_parm
= t
;
13601 t
= DECL_CHAIN (t
);
13603 if (DECL_HAS_VTT_PARM_P (decl1
))
13605 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13606 current_vtt_parm
= t
;
13610 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13611 /* Implicitly-defined methods (like the
13612 destructor for a class in which no destructor
13613 is explicitly declared) must not be defined
13614 until their definition is needed. So, we
13615 ignore interface specifications for
13616 compiler-generated functions. */
13617 && !DECL_ARTIFICIAL (decl1
));
13619 if (processing_template_decl
)
13620 /* Don't mess with interface flags. */;
13621 else if (DECL_INTERFACE_KNOWN (decl1
))
13623 tree ctx
= decl_function_context (decl1
);
13625 if (DECL_NOT_REALLY_EXTERN (decl1
))
13626 DECL_EXTERNAL (decl1
) = 0;
13628 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13629 /* This is a function in a local class in an extern inline
13630 or template function. */
13631 comdat_linkage (decl1
);
13633 /* If this function belongs to an interface, it is public.
13634 If it belongs to someone else's interface, it is also external.
13635 This only affects inlines and template instantiations. */
13636 else if (!finfo
->interface_unknown
&& honor_interface
)
13638 if (DECL_DECLARED_INLINE_P (decl1
)
13639 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13641 DECL_EXTERNAL (decl1
)
13642 = (finfo
->interface_only
13643 || (DECL_DECLARED_INLINE_P (decl1
)
13644 && ! flag_implement_inlines
13645 && !DECL_VINDEX (decl1
)));
13647 /* For WIN32 we also want to put these in linkonce sections. */
13648 maybe_make_one_only (decl1
);
13651 DECL_EXTERNAL (decl1
) = 0;
13652 DECL_INTERFACE_KNOWN (decl1
) = 1;
13653 /* If this function is in an interface implemented in this file,
13654 make sure that the back end knows to emit this function
13656 if (!DECL_EXTERNAL (decl1
))
13657 mark_needed (decl1
);
13659 else if (finfo
->interface_unknown
&& finfo
->interface_only
13660 && honor_interface
)
13662 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13663 interface, we will have both finfo->interface_unknown and
13664 finfo->interface_only set. In that case, we don't want to
13665 use the normal heuristics because someone will supply a
13666 #pragma implementation elsewhere, and deducing it here would
13667 produce a conflict. */
13668 comdat_linkage (decl1
);
13669 DECL_EXTERNAL (decl1
) = 0;
13670 DECL_INTERFACE_KNOWN (decl1
) = 1;
13671 DECL_DEFER_OUTPUT (decl1
) = 1;
13675 /* This is a definition, not a reference.
13676 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13677 if (!GNU_INLINE_P (decl1
))
13678 DECL_EXTERNAL (decl1
) = 0;
13680 if ((DECL_DECLARED_INLINE_P (decl1
)
13681 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13682 && ! DECL_INTERFACE_KNOWN (decl1
))
13683 DECL_DEFER_OUTPUT (decl1
) = 1;
13685 DECL_INTERFACE_KNOWN (decl1
) = 1;
13688 /* Determine the ELF visibility attribute for the function. We must not
13689 do this before calling "pushdecl", as we must allow "duplicate_decls"
13690 to merge any attributes appropriately. We also need to wait until
13692 if (!DECL_CLONED_FUNCTION_P (decl1
))
13693 determine_visibility (decl1
);
13695 if (!processing_template_decl
)
13696 maybe_instantiate_noexcept (decl1
);
13698 begin_scope (sk_function_parms
, decl1
);
13702 if (DECL_DESTRUCTOR_P (decl1
)
13703 || (DECL_CONSTRUCTOR_P (decl1
)
13704 && targetm
.cxx
.cdtor_returns_this ()))
13706 cdtor_label
= create_artificial_label (input_location
);
13709 start_fname_decls ();
13711 store_parm_decls (current_function_parms
);
13713 if (!processing_template_decl
13714 && flag_lifetime_dse
&& DECL_CONSTRUCTOR_P (decl1
))
13716 /* Insert a clobber to let the back end know that the object storage
13717 is dead when we enter the constructor. */
13718 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13719 tree clobber
= build_constructor (btype
, NULL
);
13720 TREE_THIS_VOLATILE (clobber
) = true;
13721 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
13722 bref
= convert_from_reference (bref
);
13723 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13724 finish_expr_stmt (exprstmt
);
13731 /* Like start_preparsed_function, except that instead of a
13732 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13734 Returns true on success. If the DECLARATOR is not suitable
13735 for a function, we return false, which tells the parser to
13736 skip the entire function. */
13739 start_function (cp_decl_specifier_seq
*declspecs
,
13740 const cp_declarator
*declarator
,
13745 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13746 invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION
, decl1
);
13747 if (decl1
== error_mark_node
)
13749 /* If the declarator is not suitable for a function definition,
13750 cause a syntax error. */
13751 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13753 error ("invalid function declaration");
13757 if (DECL_MAIN_P (decl1
))
13758 /* main must return int. grokfndecl should have corrected it
13759 (and issued a diagnostic) if the user got it wrong. */
13760 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13761 integer_type_node
));
13763 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13766 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13770 use_eh_spec_block (tree fn
)
13772 return (flag_exceptions
&& flag_enforce_eh_specs
13773 && !processing_template_decl
13774 && !type_throw_all_p (TREE_TYPE (fn
))
13775 /* We insert the EH_SPEC_BLOCK only in the original
13776 function; then, it is copied automatically to the
13778 && !DECL_CLONED_FUNCTION_P (fn
)
13779 /* Implicitly-generated constructors and destructors have
13780 exception specifications. However, those specifications
13781 are the union of the possible exceptions specified by the
13782 constructors/destructors for bases and members, so no
13783 unallowed exception will ever reach this function. By
13784 not creating the EH_SPEC_BLOCK we save a little memory,
13785 and we avoid spurious warnings about unreachable
13787 && !DECL_DEFAULTED_FN (fn
));
13790 /* Store the parameter declarations into the current function declaration.
13791 This is called after parsing the parameter declarations, before
13792 digesting the body of the function.
13794 Also install to binding contour return value identifier, if any. */
13797 store_parm_decls (tree current_function_parms
)
13799 tree fndecl
= current_function_decl
;
13802 /* This is a chain of any other decls that came in among the parm
13803 declarations. If a parm is declared with enum {foo, bar} x;
13804 then CONST_DECLs for foo and bar are put here. */
13805 tree nonparms
= NULL_TREE
;
13807 if (current_function_parms
)
13809 /* This case is when the function was defined with an ANSI prototype.
13810 The parms already have decls, so we need not do anything here
13811 except record them as in effect
13812 and complain if any redundant old-style parm decls were written. */
13814 tree specparms
= current_function_parms
;
13817 /* Must clear this because it might contain TYPE_DECLs declared
13819 current_binding_level
->names
= NULL
;
13821 /* If we're doing semantic analysis, then we'll call pushdecl
13822 for each of these. We must do them in reverse order so that
13823 they end in the correct forward order. */
13824 specparms
= nreverse (specparms
);
13826 for (parm
= specparms
; parm
; parm
= next
)
13828 next
= DECL_CHAIN (parm
);
13829 if (TREE_CODE (parm
) == PARM_DECL
)
13831 if (DECL_NAME (parm
) == NULL_TREE
13832 || !VOID_TYPE_P (parm
))
13835 error ("parameter %qD declared void", parm
);
13839 /* If we find an enum constant or a type tag,
13840 put it aside for the moment. */
13841 TREE_CHAIN (parm
) = NULL_TREE
;
13842 nonparms
= chainon (nonparms
, parm
);
13846 /* Get the decls in their original chain order and record in the
13847 function. This is all and only the PARM_DECLs that were
13848 pushed into scope by the loop above. */
13849 DECL_ARGUMENTS (fndecl
) = getdecls ();
13852 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13854 /* Now store the final chain of decls for the arguments
13855 as the decl-chain of the current lexical scope.
13856 Put the enumerators in as well, at the front so that
13857 DECL_ARGUMENTS is not modified. */
13858 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13860 if (use_eh_spec_block (current_function_decl
))
13861 current_eh_spec_block
= begin_eh_spec_block ();
13865 /* We have finished doing semantic analysis on DECL, but have not yet
13866 generated RTL for its body. Save away our current state, so that
13867 when we want to generate RTL later we know what to do. */
13870 save_function_data (tree decl
)
13872 struct language_function
*f
;
13874 /* Save the language-specific per-function data so that we can
13875 get it back when we really expand this function. */
13876 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13879 f
= ggc_alloc
<language_function
> ();
13880 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13881 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13883 /* Clear out the bits we don't need. */
13884 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13885 f
->bindings
= NULL
;
13886 f
->x_local_names
= NULL
;
13887 f
->base
.local_typedefs
= NULL
;
13891 /* Set the return value of the constructor (if present). */
13894 finish_constructor_body (void)
13899 if (targetm
.cxx
.cdtor_returns_this ()
13900 && (! TYPE_FOR_JAVA (current_class_type
)))
13902 /* Any return from a constructor will end up here. */
13903 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13905 val
= DECL_ARGUMENTS (current_function_decl
);
13906 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13907 DECL_RESULT (current_function_decl
), val
);
13908 /* Return the address of the object. */
13909 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13910 add_stmt (exprstmt
);
13914 /* Do all the processing for the beginning of a destructor; set up the
13915 vtable pointers and cleanups for bases and members. */
13918 begin_destructor_body (void)
13920 tree compound_stmt
;
13922 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13923 issued an error message. We still want to try to process the
13924 body of the function, but initialize_vtbl_ptrs will crash if
13925 TYPE_BINFO is NULL. */
13926 if (COMPLETE_TYPE_P (current_class_type
))
13928 compound_stmt
= begin_compound_stmt (0);
13929 /* Make all virtual function table pointers in non-virtual base
13930 classes point to CURRENT_CLASS_TYPE's virtual function
13932 initialize_vtbl_ptrs (current_class_ptr
);
13933 finish_compound_stmt (compound_stmt
);
13935 if (flag_lifetime_dse
)
13937 /* Insert a cleanup to let the back end know that the object is dead
13938 when we exit the destructor, either normally or via exception. */
13939 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13940 tree clobber
= build_constructor (btype
, NULL
);
13941 TREE_THIS_VOLATILE (clobber
) = true;
13942 tree bref
= build_nop (build_reference_type (btype
),
13943 current_class_ptr
);
13944 bref
= convert_from_reference (bref
);
13945 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13946 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13949 /* And insert cleanups for our bases and members so that they
13950 will be properly destroyed if we throw. */
13951 push_base_cleanups ();
13955 /* At the end of every destructor we generate code to delete the object if
13956 necessary. Do that now. */
13959 finish_destructor_body (void)
13963 /* Any return from a destructor will end up here; that way all base
13964 and member cleanups will be run when the function returns. */
13965 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13967 /* In a virtual destructor, we must call delete. */
13968 if (DECL_VIRTUAL_P (current_function_decl
))
13971 tree virtual_size
= cxx_sizeof (current_class_type
);
13975 At the point of definition of a virtual destructor (including
13976 an implicit definition), non-placement operator delete shall
13977 be looked up in the scope of the destructor's class and if
13978 found shall be accessible and unambiguous. */
13979 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13981 /*global_p=*/false,
13982 /*placement=*/NULL_TREE
,
13983 /*alloc_fn=*/NULL_TREE
,
13984 tf_warning_or_error
);
13986 if_stmt
= begin_if_stmt ();
13987 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13988 current_in_charge_parm
,
13991 finish_expr_stmt (exprstmt
);
13992 finish_then_clause (if_stmt
);
13993 finish_if_stmt (if_stmt
);
13996 if (targetm
.cxx
.cdtor_returns_this ())
14000 val
= DECL_ARGUMENTS (current_function_decl
);
14001 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
14002 DECL_RESULT (current_function_decl
), val
);
14003 /* Return the address of the object. */
14004 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
14005 add_stmt (exprstmt
);
14009 /* Do the necessary processing for the beginning of a function body, which
14010 in this case includes member-initializers, but not the catch clauses of
14011 a function-try-block. Currently, this means opening a binding level
14012 for the member-initializers (in a ctor), member cleanups (in a dtor),
14013 and capture proxies (in a lambda operator()). */
14016 begin_function_body (void)
14020 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14023 if (processing_template_decl
)
14024 /* Do nothing now. */;
14026 /* Always keep the BLOCK node associated with the outermost pair of
14027 curly braces of a function. These are needed for correct
14028 operation of dwarfout.c. */
14029 keep_next_level (true);
14031 stmt
= begin_compound_stmt (BCS_FN_BODY
);
14033 if (processing_template_decl
)
14034 /* Do nothing now. */;
14035 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14036 begin_destructor_body ();
14041 /* Do the processing for the end of a function body. Currently, this means
14042 closing out the cleanups for fully-constructed bases and members, and in
14043 the case of the destructor, deleting the object if desired. Again, this
14044 is only meaningful for [cd]tors, since they are the only functions where
14045 there is a significant distinction between the main body and any
14046 function catch clauses. Handling, say, main() return semantics here
14047 would be wrong, as flowing off the end of a function catch clause for
14048 main() would also need to return 0. */
14051 finish_function_body (tree compstmt
)
14053 if (compstmt
== NULL_TREE
)
14056 /* Close the block. */
14057 finish_compound_stmt (compstmt
);
14059 if (processing_template_decl
)
14060 /* Do nothing now. */;
14061 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14062 finish_constructor_body ();
14063 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14064 finish_destructor_body ();
14067 /* Given a function, returns the BLOCK corresponding to the outermost level
14068 of curly braces, skipping the artificial block created for constructor
14072 outer_curly_brace_block (tree fndecl
)
14074 tree block
= DECL_INITIAL (fndecl
);
14075 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14077 block
= BLOCK_SUBBLOCKS (block
);
14078 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14080 block
= BLOCK_SUBBLOCKS (block
);
14081 gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block
));
14085 /* If FNDECL is a class's key method, add the class to the list of
14086 keyed classes that should be emitted. */
14089 record_key_method_defined (tree fndecl
)
14091 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14092 && DECL_VIRTUAL_P (fndecl
)
14093 && !processing_template_decl
)
14095 tree fnclass
= DECL_CONTEXT (fndecl
);
14096 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14097 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14101 /* Subroutine of finish_function.
14102 Save the body of constexpr functions for possible
14103 future compile time evaluation. */
14106 maybe_save_function_definition (tree fun
)
14108 if (!processing_template_decl
14109 && DECL_DECLARED_CONSTEXPR_P (fun
)
14110 && !cp_function_chain
->invalid_constexpr
14111 && !DECL_CLONED_FUNCTION_P (fun
))
14112 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14115 /* Finish up a function declaration and compile that function
14116 all the way to assembler language output. The free the storage
14117 for the function definition.
14119 FLAGS is a bitwise or of the following values:
14121 We just finished processing the body of an in-class inline
14122 function definition. (This processing will have taken place
14123 after the class definition is complete.) */
14126 finish_function (int flags
)
14128 tree fndecl
= current_function_decl
;
14129 tree fntype
, ctype
= NULL_TREE
;
14130 int inclass_inline
= (flags
& 2) != 0;
14132 /* When we get some parse errors, we can end up without a
14133 current_function_decl, so cope. */
14134 if (fndecl
== NULL_TREE
)
14135 return error_mark_node
;
14137 if (c_dialect_objc ())
14138 objc_finish_function ();
14140 gcc_assert (!defer_mark_used_calls
);
14141 defer_mark_used_calls
= true;
14143 record_key_method_defined (fndecl
);
14145 fntype
= TREE_TYPE (fndecl
);
14147 /* TREE_READONLY (fndecl) = 1;
14148 This caused &foo to be of type ptr-to-const-function
14149 which then got a warning when stored in a ptr-to-function variable. */
14151 gcc_assert (building_stmt_list_p ());
14152 /* The current function is being defined, so its DECL_INITIAL should
14153 be set, and unless there's a multiple definition, it should be
14154 error_mark_node. */
14155 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14157 /* For a cloned function, we've already got all the code we need;
14158 there's no need to add any extra bits. */
14159 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14161 /* Make it so that `main' always returns 0 by default. */
14162 if (DECL_MAIN_P (current_function_decl
))
14163 finish_return_stmt (integer_zero_node
);
14165 if (use_eh_spec_block (current_function_decl
))
14166 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14167 (TREE_TYPE (current_function_decl
)),
14168 current_eh_spec_block
);
14171 /* If we're saving up tree structure, tie off the function now. */
14172 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14174 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14175 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14177 finish_fname_decls ();
14179 /* If this function can't throw any exceptions, remember that. */
14180 if (!processing_template_decl
14181 && !cp_function_chain
->can_throw
14182 && !flag_non_call_exceptions
14183 && !decl_replaceable_p (fndecl
))
14184 TREE_NOTHROW (fndecl
) = 1;
14186 /* This must come after expand_function_end because cleanups might
14187 have declarations (from inline functions) that need to go into
14188 this function's blocks. */
14190 /* If the current binding level isn't the outermost binding level
14191 for this function, either there is a bug, or we have experienced
14192 syntax errors and the statement tree is malformed. */
14193 if (current_binding_level
->kind
!= sk_function_parms
)
14195 /* Make sure we have already experienced errors. */
14196 gcc_assert (errorcount
);
14198 /* Throw away the broken statement tree and extra binding
14200 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14202 while (current_binding_level
->kind
!= sk_function_parms
)
14204 if (current_binding_level
->kind
== sk_class
)
14205 pop_nested_class ();
14207 poplevel (0, 0, 0);
14210 poplevel (1, 0, 1);
14212 /* Statements should always be full-expressions at the outermost set
14213 of curly braces for a function. */
14214 gcc_assert (stmts_are_full_exprs_p ());
14216 /* If there are no return statements in a function with auto return type,
14217 the return type is void. But if the declared type is something like
14218 auto*, this is an error. */
14219 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14220 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14222 if (!is_auto (current_function_auto_return_pattern
)
14223 && !current_function_returns_value
&& !current_function_returns_null
)
14225 error ("no return statements in function returning %qT",
14226 current_function_auto_return_pattern
);
14227 inform (input_location
, "only plain %<auto%> return type can be "
14228 "deduced to %<void%>");
14230 apply_deduced_return_type (fndecl
, void_type_node
);
14231 fntype
= TREE_TYPE (fndecl
);
14234 /* Save constexpr function body before it gets munged by
14235 the NRV transformation. */
14236 maybe_save_function_definition (fndecl
);
14238 /* Set up the named return value optimization, if we can. Candidate
14239 variables are selected in check_return_expr. */
14240 if (current_function_return_value
)
14242 tree r
= current_function_return_value
;
14245 if (r
!= error_mark_node
14246 /* This is only worth doing for fns that return in memory--and
14247 simpler, since we don't have to worry about promoted modes. */
14248 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14249 /* Only allow this for variables declared in the outer scope of
14250 the function so we know that their lifetime always ends with a
14251 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14252 we were to do this optimization in tree-ssa. */
14253 && (outer
= outer_curly_brace_block (fndecl
))
14254 && chain_member (r
, BLOCK_VARS (outer
)))
14255 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14257 current_function_return_value
= NULL_TREE
;
14260 /* Remember that we were in class scope. */
14261 if (current_class_name
)
14262 ctype
= current_class_type
;
14264 /* Must mark the RESULT_DECL as being in this function. */
14265 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14267 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14268 to the FUNCTION_DECL node itself. */
14269 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14271 /* Save away current state, if appropriate. */
14272 if (!processing_template_decl
)
14273 save_function_data (fndecl
);
14275 /* Complain if there's just no return statement. */
14276 if (warn_return_type
14277 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14278 && !dependent_type_p (TREE_TYPE (fntype
))
14279 && !current_function_returns_value
&& !current_function_returns_null
14280 /* Don't complain if we abort or throw. */
14281 && !current_function_returns_abnormally
14282 /* Don't complain if there's an infinite loop. */
14283 && !current_function_infinite_loop
14284 /* Don't complain if we are declared noreturn. */
14285 && !TREE_THIS_VOLATILE (fndecl
)
14286 && !DECL_NAME (DECL_RESULT (fndecl
))
14287 && !TREE_NO_WARNING (fndecl
)
14288 /* Structor return values (if any) are set by the compiler. */
14289 && !DECL_CONSTRUCTOR_P (fndecl
)
14290 && !DECL_DESTRUCTOR_P (fndecl
)
14291 && targetm
.warn_func_return (fndecl
))
14293 warning (OPT_Wreturn_type
,
14294 "no return statement in function returning non-void");
14295 TREE_NO_WARNING (fndecl
) = 1;
14298 /* Store the end of the function, so that we get good line number
14299 info for the epilogue. */
14300 cfun
->function_end_locus
= input_location
;
14302 /* Complain about parameters that are only set, but never otherwise used. */
14303 if (warn_unused_but_set_parameter
14304 && !processing_template_decl
14305 && errorcount
== unused_but_set_errorcount
14306 && !DECL_CLONED_FUNCTION_P (fndecl
))
14310 for (decl
= DECL_ARGUMENTS (fndecl
);
14312 decl
= DECL_CHAIN (decl
))
14313 if (TREE_USED (decl
)
14314 && TREE_CODE (decl
) == PARM_DECL
14315 && !DECL_READ_P (decl
)
14316 && DECL_NAME (decl
)
14317 && !DECL_ARTIFICIAL (decl
)
14318 && !TREE_NO_WARNING (decl
)
14319 && !DECL_IN_SYSTEM_HEADER (decl
)
14320 && TREE_TYPE (decl
) != error_mark_node
14321 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14322 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14323 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14324 warning (OPT_Wunused_but_set_parameter
,
14325 "parameter %q+D set but not used", decl
);
14326 unused_but_set_errorcount
= errorcount
;
14329 /* Complain about locally defined typedefs that are not used in this
14331 maybe_warn_unused_local_typedefs ();
14333 /* Possibly warn about unused parameters. */
14334 if (warn_unused_parameter
14335 && !processing_template_decl
14336 && !DECL_CLONED_FUNCTION_P (fndecl
))
14337 do_warn_unused_parameter (fndecl
);
14339 /* Genericize before inlining. */
14340 if (!processing_template_decl
)
14342 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14343 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14344 cp_genericize (fndecl
);
14345 /* Clear out the bits we don't need. */
14346 f
->x_current_class_ptr
= NULL
;
14347 f
->x_current_class_ref
= NULL
;
14348 f
->x_eh_spec_block
= NULL
;
14349 f
->x_in_charge_parm
= NULL
;
14350 f
->x_vtt_parm
= NULL
;
14351 f
->x_return_value
= NULL
;
14352 f
->bindings
= NULL
;
14353 f
->extern_decl_map
= NULL
;
14354 f
->infinite_loops
= NULL
;
14356 /* Clear out the bits we don't need. */
14357 local_names
= NULL
;
14359 /* We're leaving the context of this function, so zap cfun. It's still in
14360 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14362 current_function_decl
= NULL
;
14364 /* If this is an in-class inline definition, we may have to pop the
14365 bindings for the template parameters that we added in
14366 maybe_begin_member_template_processing when start_function was
14368 if (inclass_inline
)
14369 maybe_end_member_template_processing ();
14371 /* Leave the scope of the class. */
14373 pop_nested_class ();
14378 current_function_decl
= NULL_TREE
;
14380 defer_mark_used_calls
= false;
14381 if (deferred_mark_used_calls
)
14386 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14388 vec_free (deferred_mark_used_calls
);
14391 invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION
, fndecl
);
14395 /* Create the FUNCTION_DECL for a function definition.
14396 DECLSPECS and DECLARATOR are the parts of the declaration;
14397 they describe the return type and the name of the function,
14398 but twisted together in a fashion that parallels the syntax of C.
14400 This function creates a binding context for the function body
14401 as well as setting up the FUNCTION_DECL in current_function_decl.
14403 Returns a FUNCTION_DECL on success.
14405 If the DECLARATOR is not suitable for a function (it defines a datum
14406 instead), we return 0, which tells yyparse to report a parse error.
14408 May return void_type_node indicating that this method is actually
14409 a friend. See grokfield for more details.
14411 Came here with a `.pushlevel' .
14413 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14414 CHANGES TO CODE IN `grokfield'. */
14417 grokmethod (cp_decl_specifier_seq
*declspecs
,
14418 const cp_declarator
*declarator
, tree attrlist
)
14420 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14423 if (fndecl
== error_mark_node
)
14424 return error_mark_node
;
14426 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14428 error ("invalid member function declaration");
14429 return error_mark_node
;
14433 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14435 /* Pass friends other than inline friend functions back. */
14436 if (fndecl
== void_type_node
)
14439 if (DECL_IN_AGGR_P (fndecl
))
14441 if (DECL_CLASS_SCOPE_P (fndecl
))
14442 error ("%qD is already defined in class %qT", fndecl
,
14443 DECL_CONTEXT (fndecl
));
14444 return error_mark_node
;
14447 check_template_shadow (fndecl
);
14449 if (TREE_PUBLIC (fndecl
))
14450 DECL_COMDAT (fndecl
) = 1;
14451 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14452 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14454 /* We process method specializations in finish_struct_1. */
14455 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14457 fndecl
= push_template_decl (fndecl
);
14458 if (fndecl
== error_mark_node
)
14462 if (! DECL_FRIEND_P (fndecl
))
14464 if (DECL_CHAIN (fndecl
))
14466 fndecl
= copy_node (fndecl
);
14467 TREE_CHAIN (fndecl
) = NULL_TREE
;
14471 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14473 DECL_IN_AGGR_P (fndecl
) = 1;
14478 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14479 we can lay it out later, when and if its type becomes complete.
14481 Also handle constexpr variables where the initializer involves
14482 an unlowered PTRMEM_CST because the class isn't complete yet. */
14485 maybe_register_incomplete_var (tree var
)
14487 gcc_assert (VAR_P (var
));
14489 /* Keep track of variables with incomplete types. */
14490 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14491 && DECL_EXTERNAL (var
))
14493 tree inner_type
= TREE_TYPE (var
);
14495 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14496 inner_type
= TREE_TYPE (inner_type
);
14497 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14499 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14500 /* RTTI TD entries are created while defining the type_info. */
14501 || (TYPE_LANG_SPECIFIC (inner_type
)
14502 && TYPE_BEING_DEFINED (inner_type
)))
14504 incomplete_var iv
= {var
, inner_type
};
14505 vec_safe_push (incomplete_vars
, iv
);
14507 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14508 && decl_constant_var_p (var
)
14509 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14511 /* When the outermost open class is complete we can resolve any
14512 pointers-to-members. */
14513 tree context
= outermost_open_class ();
14514 incomplete_var iv
= {var
, context
};
14515 vec_safe_push (incomplete_vars
, iv
);
14520 /* Called when a class type (given by TYPE) is defined. If there are
14521 any existing VAR_DECLs whose type has been completed by this
14522 declaration, update them now. */
14525 complete_vars (tree type
)
14528 incomplete_var
*iv
;
14530 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14532 if (same_type_p (type
, iv
->incomplete_type
))
14534 tree var
= iv
->decl
;
14535 tree type
= TREE_TYPE (var
);
14537 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14538 == iv
->incomplete_type
)
14540 /* Complete the type of the variable. The VAR_DECL itself
14541 will be laid out in expand_expr. */
14542 complete_type (type
);
14543 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14546 if (DECL_INITIAL (var
)
14547 && decl_constant_var_p (var
))
14548 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14550 /* Remove this entry from the list. */
14551 incomplete_vars
->unordered_remove (ix
);
14557 /* Check for pending declarations which may have abstract type. */
14558 complete_type_check_abstract (type
);
14561 /* If DECL is of a type which needs a cleanup, build and return an
14562 expression to perform that cleanup here. Return NULL_TREE if no
14563 cleanup need be done. */
14566 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14572 /* Assume no cleanup is required. */
14573 cleanup
= NULL_TREE
;
14575 if (error_operand_p (decl
))
14578 /* Handle "__attribute__((cleanup))". We run the cleanup function
14579 before the destructor since the destructor is what actually
14580 terminates the lifetime of the object. */
14581 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14588 /* Get the name specified by the user for the cleanup function. */
14589 id
= TREE_VALUE (TREE_VALUE (attr
));
14590 /* Look up the name to find the cleanup function to call. It is
14591 important to use lookup_name here because that is what is
14592 used in c-common.c:handle_cleanup_attribute when performing
14593 initial checks on the attribute. Note that those checks
14594 include ensuring that the function found is not an overloaded
14595 function, or an object with an overloaded call operator,
14596 etc.; we can rely on the fact that the function found is an
14597 ordinary FUNCTION_DECL. */
14598 fn
= lookup_name (id
);
14599 arg
= build_address (decl
);
14600 if (!mark_used (decl
, complain
) && !(complain
& tf_error
))
14601 return error_mark_node
;
14602 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14603 if (cleanup
== error_mark_node
)
14604 return error_mark_node
;
14606 /* Handle ordinary C++ destructors. */
14607 type
= TREE_TYPE (decl
);
14608 if (type_build_dtor_call (type
))
14610 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14614 if (TREE_CODE (type
) == ARRAY_TYPE
)
14617 addr
= build_address (decl
);
14619 call
= build_delete (TREE_TYPE (addr
), addr
,
14620 sfk_complete_destructor
, flags
, 0, complain
);
14621 if (call
== error_mark_node
)
14622 cleanup
= error_mark_node
;
14623 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14624 /* Discard the call. */;
14626 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14631 /* build_delete sets the location of the destructor call to the
14632 current location, even though the destructor is going to be
14633 called later, at the end of the current scope. This can lead to
14634 a "jumpy" behaviour for users of debuggers when they step around
14635 the end of the block. So let's unset the location of the
14636 destructor call instead. */
14637 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14638 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14641 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
)))
14642 /* Treat objects with destructors as used; the destructor may do
14643 something substantive. */
14644 && !mark_used (decl
, complain
) && !(complain
& tf_error
))
14645 return error_mark_node
;
14651 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14652 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14653 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14656 static_fn_type (tree memfntype
)
14661 if (TYPE_PTRMEMFUNC_P (memfntype
))
14662 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14663 if (POINTER_TYPE_P (memfntype
)
14664 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14665 memfntype
= TREE_TYPE (memfntype
);
14666 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14668 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14669 args
= TYPE_ARG_TYPES (memfntype
);
14670 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14671 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14672 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14673 fntype
= (cp_build_type_attribute_variant
14674 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14675 fntype
= (build_exception_variant
14676 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14677 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14678 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14682 /* DECL was originally constructed as a non-static member function,
14683 but turned out to be static. Update it accordingly. */
14686 revert_static_member_fn (tree decl
)
14688 tree stype
= static_fn_type (decl
);
14689 cp_cv_quals quals
= type_memfn_quals (stype
);
14690 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14692 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14693 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14695 TREE_TYPE (decl
) = stype
;
14697 if (DECL_ARGUMENTS (decl
))
14698 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14699 DECL_STATIC_FUNCTION_P (decl
) = 1;
14702 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14703 one of the language-independent trees. */
14705 enum cp_tree_node_structure_enum
14706 cp_tree_node_structure (union lang_tree_node
* t
)
14708 switch (TREE_CODE (&t
->generic
))
14710 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14711 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14712 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14713 case OVERLOAD
: return TS_CP_OVERLOAD
;
14714 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14715 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14716 case BASELINK
: return TS_CP_BASELINK
;
14717 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14718 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14719 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14720 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14721 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14722 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14723 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14724 default: return TS_CP_GENERIC
;
14728 /* Build the void_list_node (void_type_node having been created). */
14730 build_void_list_node (void)
14732 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14737 cp_missing_noreturn_ok_p (tree decl
)
14739 /* A missing noreturn is ok for the `main' function. */
14740 return DECL_MAIN_P (decl
);
14743 /* Return the decl used to identify the COMDAT group into which DECL should
14747 cxx_comdat_group (tree decl
)
14749 /* Virtual tables, construction virtual tables, and virtual table
14750 tables all go in a single COMDAT group, named after the primary
14752 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14753 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14754 /* For all other DECLs, the COMDAT group is the mangled name of the
14755 declaration itself. */
14758 while (DECL_THUNK_P (decl
))
14760 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14761 into the same section as the target function. In that case
14762 we must return target's name. */
14763 tree target
= THUNK_TARGET (decl
);
14764 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14765 && DECL_SECTION_NAME (target
) != NULL
14766 && DECL_ONE_ONLY (target
))
14776 /* Returns the return type for FN as written by the user, which may include
14777 a placeholder for a deduced return type. */
14780 fndecl_declared_return_type (tree fn
)
14782 fn
= STRIP_TEMPLATE (fn
);
14783 if (FNDECL_USED_AUTO (fn
))
14785 struct language_function
*f
= NULL
;
14786 if (DECL_STRUCT_FUNCTION (fn
))
14787 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14789 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14790 return f
->x_auto_return_pattern
;
14792 return TREE_TYPE (TREE_TYPE (fn
));
14795 /* Returns true iff DECL was declared with an auto return type and it has
14796 not yet been deduced to a real type. */
14799 undeduced_auto_decl (tree decl
)
14801 if (cxx_dialect
< cxx14
)
14803 return type_uses_auto (TREE_TYPE (decl
));
14806 /* Complain if DECL has an undeduced return type. */
14809 require_deduced_type (tree decl
)
14811 if (undeduced_auto_decl (decl
))
14812 error ("use of %qD before deduction of %<auto%>", decl
);
14815 #include "gt-cp-decl.h"