1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2015 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
31 #include "coretypes.h"
35 #include "tree-hasher.h"
36 #include "stringpool.h"
37 #include "stor-layout.h"
43 #include "tree-iterator.h"
44 #include "tree-inline.h"
50 #include "c-family/c-common.h"
51 #include "c-family/c-objc.h"
52 #include "c-family/c-pragma.h"
53 #include "c-family/c-target.h"
54 #include "c-family/c-ubsan.h"
55 #include "diagnostic.h"
59 #include "splay-tree.h"
61 #include "hard-reg-set.h"
67 /* Possible cases of bad specifiers type used by bad_specifiers. */
69 BSP_VAR
, /* variable */
70 BSP_PARM
, /* parameter */
75 static tree
grokparms (tree parmlist
, tree
*);
76 static const char *redeclaration_error_message (tree
, tree
);
78 static int decl_jump_unsafe (tree
);
79 static void require_complete_types_for_parms (tree
);
80 static int ambi_op_p (enum tree_code
);
81 static int unary_op_p (enum tree_code
);
82 static void push_local_name (tree
);
83 static tree
grok_reference_init (tree
, tree
, tree
, int);
84 static tree
grokvardecl (tree
, tree
, tree
, const cp_decl_specifier_seq
*,
86 static int check_static_variable_definition (tree
, tree
);
87 static void record_unknown_type (tree
, const char *);
88 static tree
builtin_function_1 (tree
, tree
, bool);
89 static int member_function_or_else (tree
, tree
, enum overload_flags
);
90 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
92 static void check_for_uninitialized_const_var (tree
);
93 static tree
local_variable_p_walkfn (tree
*, int *, void *);
94 static tree
record_builtin_java_type (const char *, int);
95 static const char *tag_name (enum tag_types
);
96 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
97 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
98 static void maybe_deduce_size_from_array_init (tree
, tree
);
99 static void layout_var_decl (tree
);
100 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
101 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
102 static void save_function_data (tree
);
103 static void copy_type_enum (tree
, tree
);
104 static void check_function_type (tree
, tree
);
105 static void finish_constructor_body (void);
106 static void begin_destructor_body (void);
107 static void finish_destructor_body (void);
108 static void record_key_method_defined (tree
);
109 static tree
create_array_type_for_decl (tree
, tree
, tree
);
110 static tree
get_atexit_node (void);
111 static tree
get_dso_handle_node (void);
112 static tree
start_cleanup_fn (void);
113 static void end_cleanup_fn (void);
114 static tree
cp_make_fname_decl (location_t
, tree
, int);
115 static void initialize_predefined_identifiers (void);
116 static tree check_special_function_return_type
117 (special_function_kind
, tree
, tree
);
118 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
119 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
120 static void store_parm_decls (tree
);
121 static void initialize_local_var (tree
, tree
);
122 static void expand_static_init (tree
, tree
);
124 /* The following symbols are subsumed in the cp_global_trees array, and
125 listed here individually for documentation purposes.
128 tree wchar_decl_node;
130 tree vtable_entry_type;
131 tree delta_type_node;
132 tree __t_desc_type_node;
134 tree class_type_node;
135 tree unknown_type_node;
137 Array type `vtable_entry_type[]'
140 tree vtbl_ptr_type_node;
147 A FUNCTION_DECL which can call `abort'. Not necessarily the
148 one that the user will declare, but sufficient to be called
149 by routines that want to abort the program.
154 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
155 tree tinfo_var_id; */
157 tree cp_global_trees
[CPTI_MAX
];
159 /* Indicates that there is a type value in some namespace, although
160 that is not necessarily in scope at the moment. */
162 tree global_type_node
;
164 /* The node that holds the "name" of the global scope. */
165 tree global_scope_name
;
167 #define local_names cp_function_chain->x_local_names
169 /* A list of objects which have constructors or destructors
170 which reside in the global scope. The decl is stored in
171 the TREE_VALUE slot and the initializer is stored
172 in the TREE_PURPOSE slot. */
173 tree static_aggregates
;
175 /* Like static_aggregates, but for thread_local variables. */
180 /* A node for the integer constant 2. */
182 tree integer_two_node
;
184 /* Used only for jumps to as-yet undefined labels, since jumps to
185 defined labels can have their validity checked immediately. */
187 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
188 struct named_label_use_entry
*next
;
189 /* The binding level to which this entry is *currently* attached.
190 This is initially the binding level in which the goto appeared,
191 but is modified as scopes are closed. */
192 cp_binding_level
*binding_level
;
193 /* The head of the names list that was current when the goto appeared,
194 or the inner scope popped. These are the decls that will *not* be
195 skipped when jumping to the label. */
197 /* The location of the goto, for error reporting. */
198 location_t o_goto_locus
;
199 /* True if an OpenMP structured block scope has been closed since
200 the goto appeared. This means that the branch from the label will
201 illegally exit an OpenMP scope. */
205 /* A list of all LABEL_DECLs in the function that have names. Here so
206 we can clear out their names' definitions at the end of the
207 function, and so we can check the validity of jumps to these labels. */
209 struct GTY((for_user
)) named_label_entry
{
210 /* The decl itself. */
213 /* The binding level to which the label is *currently* attached.
214 This is initially set to the binding level in which the label
215 is defined, but is modified as scopes are closed. */
216 cp_binding_level
*binding_level
;
217 /* The head of the names list that was current when the label was
218 defined, or the inner scope popped. These are the decls that will
219 be skipped when jumping to the label. */
221 /* A vector of all decls from all binding levels that would be
222 crossed by a backward branch to the label. */
223 vec
<tree
, va_gc
> *bad_decls
;
225 /* A list of uses of the label, before the label is defined. */
226 struct named_label_use_entry
*uses
;
228 /* The following bits are set after the label is defined, and are
229 updated as scopes are popped. They indicate that a backward jump
230 to the label will illegally enter a scope of the given flavor. */
236 #define named_labels cp_function_chain->x_named_labels
238 /* The number of function bodies which we are currently processing.
239 (Zero if we are at namespace scope, one inside the body of a
240 function, two inside the body of a function in a local class, etc.) */
243 /* To avoid unwanted recursion, finish_function defers all mark_used calls
244 encountered during its execution until it finishes. */
245 bool defer_mark_used_calls
;
246 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
248 /* States indicating how grokdeclarator() should handle declspecs marked
249 with __attribute__((deprecated)). An object declared as
250 __attribute__((deprecated)) suppresses warnings of uses of other
252 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
255 /* A list of VAR_DECLs whose type was incomplete at the time the
256 variable was declared. */
258 typedef struct GTY(()) incomplete_var_d
{
260 tree incomplete_type
;
264 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
266 /* Returns the kind of template specialization we are currently
267 processing, given that it's declaration contained N_CLASS_SCOPES
268 explicit scope qualifications. */
271 current_tmpl_spec_kind (int n_class_scopes
)
273 int n_template_parm_scopes
= 0;
274 int seen_specialization_p
= 0;
275 int innermost_specialization_p
= 0;
278 /* Scan through the template parameter scopes. */
279 for (b
= current_binding_level
;
280 b
->kind
== sk_template_parms
;
283 /* If we see a specialization scope inside a parameter scope,
284 then something is wrong. That corresponds to a declaration
287 template <class T> template <> ...
289 which is always invalid since [temp.expl.spec] forbids the
290 specialization of a class member template if the enclosing
291 class templates are not explicitly specialized as well. */
292 if (b
->explicit_spec_p
)
294 if (n_template_parm_scopes
== 0)
295 innermost_specialization_p
= 1;
297 seen_specialization_p
= 1;
299 else if (seen_specialization_p
== 1)
300 return tsk_invalid_member_spec
;
302 ++n_template_parm_scopes
;
305 /* Handle explicit instantiations. */
306 if (processing_explicit_instantiation
)
308 if (n_template_parm_scopes
!= 0)
309 /* We've seen a template parameter list during an explicit
310 instantiation. For example:
312 template <class T> template void f(int);
314 This is erroneous. */
315 return tsk_invalid_expl_inst
;
317 return tsk_expl_inst
;
320 if (n_template_parm_scopes
< n_class_scopes
)
321 /* We've not seen enough template headers to match all the
322 specialized classes present. For example:
324 template <class T> void R<T>::S<T>::f(int);
326 This is invalid; there needs to be one set of template
327 parameters for each class. */
328 return tsk_insufficient_parms
;
329 else if (n_template_parm_scopes
== n_class_scopes
)
330 /* We're processing a non-template declaration (even though it may
331 be a member of a template class.) For example:
333 template <class T> void S<T>::f(int);
335 The `class T' matches the `S<T>', leaving no template headers
336 corresponding to the `f'. */
338 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
339 /* We've got too many template headers. For example:
341 template <> template <class T> void f (T);
343 There need to be more enclosing classes. */
344 return tsk_excessive_parms
;
346 /* This must be a template. It's of the form:
348 template <class T> template <class U> void S<T>::f(U);
350 This is a specialization if the innermost level was a
351 specialization; otherwise it's just a definition of the
353 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
356 /* Exit the current scope. */
364 /* When a label goes out of scope, check to see if that label was used
365 in a valid manner, and issue any appropriate warnings or errors. */
368 pop_label (tree label
, tree old_value
)
370 if (!processing_template_decl
)
372 if (DECL_INITIAL (label
) == NULL_TREE
)
376 error ("label %q+D used but not defined", label
);
377 location
= input_location
;
378 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
379 /* Avoid crashing later. */
380 define_label (location
, DECL_NAME (label
));
383 warn_for_unused_label (label
);
386 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
389 /* At the end of a function, all labels declared within the function
390 go out of scope. BLOCK is the top-level block for the
394 pop_labels_1 (named_label_entry
**slot
, tree block
)
396 struct named_label_entry
*ent
= *slot
;
398 pop_label (ent
->label_decl
, NULL_TREE
);
400 /* Put the labels into the "variables" of the top-level block,
401 so debugger can see them. */
402 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
403 BLOCK_VARS (block
) = ent
->label_decl
;
405 named_labels
->clear_slot (slot
);
411 pop_labels (tree block
)
415 named_labels
->traverse
<tree
, pop_labels_1
> (block
);
420 /* At the end of a block with local labels, restore the outer definition. */
423 pop_local_label (tree label
, tree old_value
)
425 struct named_label_entry dummy
;
427 pop_label (label
, old_value
);
429 dummy
.label_decl
= label
;
430 named_label_entry
**slot
= named_labels
->find_slot (&dummy
, NO_INSERT
);
431 named_labels
->clear_slot (slot
);
434 /* The following two routines are used to interface to Objective-C++.
435 The binding level is purposely treated as an opaque type. */
438 objc_get_current_scope (void)
440 return current_binding_level
;
443 /* The following routine is used by the NeXT-style SJLJ exceptions;
444 variables get marked 'volatile' so as to not be clobbered by
445 _setjmp()/_longjmp() calls. All variables in the current scope,
446 as well as parent scopes up to (but not including) ENCLOSING_BLK
447 shall be thusly marked. */
450 objc_mark_locals_volatile (void *enclosing_blk
)
452 cp_binding_level
*scope
;
454 for (scope
= current_binding_level
;
455 scope
&& scope
!= enclosing_blk
;
456 scope
= scope
->level_chain
)
460 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
461 objc_volatilize_decl (decl
);
463 /* Do not climb up past the current function. */
464 if (scope
->kind
== sk_function_parms
)
469 /* Update data for defined and undefined labels when leaving a scope. */
472 poplevel_named_label_1 (named_label_entry
**slot
, cp_binding_level
*bl
)
474 named_label_entry
*ent
= *slot
;
475 cp_binding_level
*obl
= bl
->level_chain
;
477 if (ent
->binding_level
== bl
)
481 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
482 TREE_LISTs representing OVERLOADs, so be careful. */
483 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
485 : TREE_CHAIN (decl
)))
486 if (decl_jump_unsafe (decl
))
487 vec_safe_push (ent
->bad_decls
, decl
);
489 ent
->binding_level
= obl
;
490 ent
->names_in_scope
= obl
->names
;
494 ent
->in_try_scope
= true;
497 ent
->in_catch_scope
= true;
500 ent
->in_omp_scope
= true;
508 struct named_label_use_entry
*use
;
510 for (use
= ent
->uses
; use
; use
= use
->next
)
511 if (use
->binding_level
== bl
)
513 use
->binding_level
= obl
;
514 use
->names_in_scope
= obl
->names
;
515 if (bl
->kind
== sk_omp
)
516 use
->in_omp_scope
= true;
523 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
524 when errors were reported, except for -Werror-unused-but-set-*. */
525 static int unused_but_set_errorcount
;
527 /* Exit a binding level.
528 Pop the level off, and restore the state of the identifier-decl mappings
529 that were in effect when this level was entered.
531 If KEEP == 1, this level had explicit declarations, so
532 and create a "block" (a BLOCK node) for the level
533 to record its declarations and subblocks for symbol table output.
535 If FUNCTIONBODY is nonzero, this level is the body of a function,
536 so create a block as if KEEP were set and also clear out all
539 If REVERSE is nonzero, reverse the order of decls before putting
540 them into the BLOCK. */
543 poplevel (int keep
, int reverse
, int functionbody
)
546 /* The chain of decls was accumulated in reverse order.
547 Put it into forward order, just for cleanliness. */
552 int leaving_for_scope
;
555 cp_label_binding
*label_bind
;
557 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
562 gcc_assert (current_binding_level
->kind
!= sk_class
);
564 if (current_binding_level
->kind
== sk_cleanup
)
566 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
568 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
570 /* We used to use KEEP == 2 to indicate that the new block should go
571 at the beginning of the list of blocks at this binding level,
572 rather than the end. This hack is no longer used. */
573 gcc_assert (keep
== 0 || keep
== 1);
575 if (current_binding_level
->keep
)
578 /* Any uses of undefined labels, and any defined labels, now operate
579 under constraints of next binding contour. */
580 if (cfun
&& !functionbody
&& named_labels
)
581 named_labels
->traverse
<cp_binding_level
*, poplevel_named_label_1
>
582 (current_binding_level
);
584 /* Get the decls in the order they were written.
585 Usually current_binding_level->names is in reverse order.
586 But parameter decls were previously put in forward order. */
589 current_binding_level
->names
590 = decls
= nreverse (current_binding_level
->names
);
592 decls
= current_binding_level
->names
;
594 /* If there were any declarations or structure tags in that level,
595 or if this level is a function body,
596 create a BLOCK to record them for the life of this function. */
598 /* Avoid function body block if possible. */
599 if (functionbody
&& subblocks
&& BLOCK_CHAIN (subblocks
) == NULL_TREE
)
601 else if (keep
== 1 || functionbody
)
602 block
= make_node (BLOCK
);
603 if (block
!= NULL_TREE
)
605 BLOCK_VARS (block
) = decls
;
606 BLOCK_SUBBLOCKS (block
) = subblocks
;
609 /* In each subblock, record that this is its superior. */
611 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
612 BLOCK_SUPERCONTEXT (link
) = block
;
614 /* We still support the old for-scope rules, whereby the variables
615 in a for-init statement were in scope after the for-statement
616 ended. We only use the new rules if flag_new_for_scope is
619 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
621 /* Before we remove the declarations first check for unused variables. */
622 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
623 && current_binding_level
->kind
!= sk_template_parms
624 && !processing_template_decl
)
625 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
627 /* There are cases where D itself is a TREE_LIST. See in
628 push_local_binding where the list of decls returned by
629 getdecls is built. */
630 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
631 tree type
= TREE_TYPE (decl
);
633 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
634 && ! DECL_IN_SYSTEM_HEADER (decl
)
635 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
636 && type
!= error_mark_node
637 && (!CLASS_TYPE_P (type
)
638 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
639 || lookup_attribute ("warn_unused",
640 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
642 if (! TREE_USED (decl
))
643 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
644 else if (DECL_CONTEXT (decl
) == current_function_decl
645 // For -Wunused-but-set-variable leave references alone.
646 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
647 && errorcount
== unused_but_set_errorcount
)
649 warning (OPT_Wunused_but_set_variable
,
650 "variable %q+D set but not used", decl
);
651 unused_but_set_errorcount
= errorcount
;
656 /* Remove declarations for all the DECLs in this level. */
657 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
659 if (leaving_for_scope
&& VAR_P (link
)
660 /* It's hard to make this ARM compatibility hack play nicely with
661 lambdas, and it really isn't necessary in C++11 mode. */
662 && cxx_dialect
< cxx11
665 tree name
= DECL_NAME (link
);
669 ob
= outer_binding (name
,
670 IDENTIFIER_BINDING (name
),
673 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
675 ns_binding
= NULL_TREE
;
677 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
678 /* We have something like:
683 and we are leaving the `for' scope. There's no reason to
684 keep the binding of the inner `i' in this case. */
685 pop_binding (name
, link
);
686 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
687 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
688 /* Here, we have something like:
696 We must pop the for-scope binding so we know what's a
697 type and what isn't. */
698 pop_binding (name
, link
);
701 /* Mark this VAR_DECL as dead so that we can tell we left it
702 there only for backward compatibility. */
703 DECL_DEAD_FOR_LOCAL (link
) = 1;
705 /* Keep track of what should have happened when we
706 popped the binding. */
709 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
710 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
713 /* Add it to the list of dead variables in the next
714 outermost binding to that we can remove these when we
715 leave that binding. */
717 current_binding_level
->level_chain
->dead_vars_from_for
,
720 /* Although we don't pop the cxx_binding, we do clear
721 its SCOPE since the scope is going away now. */
722 IDENTIFIER_BINDING (name
)->scope
723 = current_binding_level
->level_chain
;
730 /* Remove the binding. */
733 if (TREE_CODE (decl
) == TREE_LIST
)
734 decl
= TREE_VALUE (decl
);
737 if (TREE_CODE (name
) == OVERLOAD
)
738 name
= OVL_FUNCTION (name
);
740 gcc_assert (DECL_P (name
));
741 pop_binding (DECL_NAME (name
), decl
);
745 /* Remove declarations for any `for' variables from inner scopes
746 that we kept around. */
747 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
749 pop_binding (DECL_NAME (decl
), decl
);
751 /* Restore the IDENTIFIER_TYPE_VALUEs. */
752 for (link
= current_binding_level
->type_shadowed
;
753 link
; link
= TREE_CHAIN (link
))
754 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
756 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
757 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
759 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
761 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
762 list if a `using' declaration put them there. The debugging
763 back ends won't understand OVERLOAD, so we remove them here.
764 Because the BLOCK_VARS are (temporarily) shared with
765 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
766 popped all the bindings. */
771 for (d
= &BLOCK_VARS (block
); *d
; )
773 if (TREE_CODE (*d
) == TREE_LIST
)
774 *d
= TREE_CHAIN (*d
);
776 d
= &DECL_CHAIN (*d
);
780 /* If the level being exited is the top level of a function,
781 check over all the labels. */
786 /* Since this is the top level block of a function, the vars are
787 the function's parameters. Don't leave them in the BLOCK
788 because they are found in the FUNCTION_DECL instead. */
789 BLOCK_VARS (block
) = 0;
793 pop_labels (subblocks
);
796 kind
= current_binding_level
->kind
;
797 if (kind
== sk_cleanup
)
801 /* If this is a temporary binding created for a cleanup, then we'll
802 have pushed a statement list level. Pop that, create a new
803 BIND_EXPR for the block, and insert it into the stream. */
804 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
805 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
812 /* The current function is being defined, so its DECL_INITIAL
813 should be error_mark_node. */
814 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
815 DECL_INITIAL (current_function_decl
) = block
? block
: subblocks
;
818 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
820 if (BLOCK_SUBBLOCKS (subblocks
))
821 BLOCK_OUTER_CURLY_BRACE_P (BLOCK_SUBBLOCKS (subblocks
)) = 1;
824 BLOCK_OUTER_CURLY_BRACE_P (subblocks
) = 1;
828 current_binding_level
->blocks
829 = block_chainon (current_binding_level
->blocks
, block
);
831 /* If we did not make a block for the level just exited,
832 any blocks made for inner levels
833 (since they cannot be recorded as subblocks in that level)
834 must be carried forward so they will later become subblocks
835 of something else. */
837 current_binding_level
->blocks
838 = block_chainon (current_binding_level
->blocks
, subblocks
);
840 /* Each and every BLOCK node created here in `poplevel' is important
841 (e.g. for proper debugging information) so if we created one
842 earlier, mark it as "used". */
844 TREE_USED (block
) = 1;
846 /* All temporary bindings created for cleanups are popped silently. */
847 if (kind
== sk_cleanup
)
850 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
854 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
855 itself, calling F for each. The DATA is passed to F as well. */
858 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
861 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
863 result
|= (*f
) (name_space
, data
);
865 for (; current
; current
= DECL_CHAIN (current
))
866 result
|= walk_namespaces_r (current
, f
, data
);
871 /* Walk all the namespaces, calling F for each. The DATA is passed to
875 walk_namespaces (walk_namespaces_fn f
, void* data
)
877 return walk_namespaces_r (global_namespace
, f
, data
);
880 /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
883 wrapup_globals_for_namespace (tree name_space
, void* data ATTRIBUTE_UNUSED
)
885 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
886 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
887 tree
*vec
= statics
->address ();
888 int len
= statics
->length ();
890 /* Write out any globals that need to be output. */
891 return wrapup_global_declarations (vec
, len
);
894 /* In C++, you don't have to write `struct S' to refer to `S'; you
895 can just use `S'. We accomplish this by creating a TYPE_DECL as
896 if the user had written `typedef struct S S'. Create and return
897 the TYPE_DECL for TYPE. */
900 create_implicit_typedef (tree name
, tree type
)
904 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
905 DECL_ARTIFICIAL (decl
) = 1;
906 /* There are other implicit type declarations, like the one *within*
907 a class that allows you to write `S::S'. We must distinguish
909 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
910 TYPE_NAME (type
) = decl
;
911 TYPE_STUB_DECL (type
) = decl
;
916 /* Remember a local name for name-mangling purposes. */
919 push_local_name (tree decl
)
924 timevar_start (TV_NAME_LOOKUP
);
926 name
= DECL_NAME (decl
);
928 nelts
= vec_safe_length (local_names
);
929 for (i
= 0; i
< nelts
; i
++)
931 t
= (*local_names
)[i
];
932 if (DECL_NAME (t
) == name
)
934 if (!DECL_LANG_SPECIFIC (decl
))
935 retrofit_lang_decl (decl
);
936 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
937 if (DECL_DISCRIMINATOR_SET_P (t
))
938 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
940 DECL_DISCRIMINATOR (decl
) = 1;
942 (*local_names
)[i
] = decl
;
943 timevar_stop (TV_NAME_LOOKUP
);
948 vec_safe_push (local_names
, decl
);
949 timevar_stop (TV_NAME_LOOKUP
);
952 /* Subroutine of duplicate_decls: return truthvalue of whether
953 or not types of these decls match.
955 For C++, we must compare the parameter list so that `int' can match
956 `int&' in a parameter position, but `int&' is not confused with
960 decls_match (tree newdecl
, tree olddecl
)
964 if (newdecl
== olddecl
)
967 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
968 /* If the two DECLs are not even the same kind of thing, we're not
969 interested in their types. */
972 gcc_assert (DECL_P (newdecl
));
974 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
976 tree f1
= TREE_TYPE (newdecl
);
977 tree f2
= TREE_TYPE (olddecl
);
978 tree p1
= TYPE_ARG_TYPES (f1
);
979 tree p2
= TYPE_ARG_TYPES (f2
);
982 /* Specializations of different templates are different functions
983 even if they have the same type. */
984 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
985 ? DECL_TI_TEMPLATE (newdecl
)
987 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
988 ? DECL_TI_TEMPLATE (olddecl
)
993 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
994 && ! (DECL_EXTERN_C_P (newdecl
)
995 && DECL_EXTERN_C_P (olddecl
)))
998 /* A new declaration doesn't match a built-in one unless it
999 is also extern "C". */
1000 if (DECL_IS_BUILTIN (olddecl
)
1001 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1004 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1007 /* A declaration with deduced return type should use its pre-deduction
1008 type for declaration matching. */
1009 r2
= fndecl_declared_return_type (olddecl
);
1011 if (same_type_p (TREE_TYPE (f1
), r2
))
1013 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1014 && (DECL_BUILT_IN (olddecl
)
1015 #ifndef NO_IMPLICIT_EXTERN_C
1016 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1017 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1021 types_match
= self_promoting_args_p (p1
);
1022 if (p1
== void_list_node
)
1023 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1025 #ifndef NO_IMPLICIT_EXTERN_C
1026 else if (!prototype_p (f1
)
1027 && (DECL_EXTERN_C_P (olddecl
)
1028 && DECL_IN_SYSTEM_HEADER (olddecl
)
1029 && !DECL_CLASS_SCOPE_P (olddecl
))
1030 && (DECL_EXTERN_C_P (newdecl
)
1031 && DECL_IN_SYSTEM_HEADER (newdecl
)
1032 && !DECL_CLASS_SCOPE_P (newdecl
)))
1034 types_match
= self_promoting_args_p (p2
);
1035 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1041 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1042 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1043 || comp_type_attributes (TREE_TYPE (newdecl
),
1044 TREE_TYPE (olddecl
)) != 0);
1049 /* The decls dont match if they correspond to two different versions
1050 of the same function. Disallow extern "C" functions to be
1051 versions for now. */
1053 && !DECL_EXTERN_C_P (newdecl
)
1054 && !DECL_EXTERN_C_P (olddecl
)
1055 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1057 /* Mark functions as versions if necessary. Modify the mangled decl
1058 name if necessary. */
1059 if (DECL_FUNCTION_VERSIONED (newdecl
)
1060 && DECL_FUNCTION_VERSIONED (olddecl
))
1062 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1064 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1065 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1066 mangle_decl (newdecl
);
1068 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1070 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1071 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1072 mangle_decl (olddecl
);
1074 cgraph_node::record_function_versions (olddecl
, newdecl
);
1078 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1080 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1081 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1084 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1085 DECL_TEMPLATE_PARMS (olddecl
)))
1088 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1089 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1090 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1092 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1093 DECL_TEMPLATE_RESULT (newdecl
));
1097 /* Need to check scope for variable declaration (VAR_DECL).
1098 For typedef (TYPE_DECL), scope is ignored. */
1100 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1102 Two declarations for an object with C language linkage
1103 with the same name (ignoring the namespace that qualify
1104 it) that appear in different namespace scopes refer to
1106 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1109 if (TREE_TYPE (newdecl
) == error_mark_node
)
1110 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1111 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1112 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1113 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1116 types_match
= comptypes (TREE_TYPE (newdecl
),
1117 TREE_TYPE (olddecl
),
1118 COMPARE_REDECLARATION
);
1124 /* If NEWDECL is `static' and an `extern' was seen previously,
1125 warn about it. OLDDECL is the previous declaration.
1127 Note that this does not apply to the C++ case of declaring
1128 a variable `extern const' and then later `const'.
1130 Don't complain about built-in functions, since they are beyond
1131 the user's control. */
1134 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1136 if (TREE_CODE (newdecl
) == TYPE_DECL
1137 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1138 || TREE_CODE (newdecl
) == CONST_DECL
1139 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1142 /* Don't get confused by static member functions; that's a different
1144 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1145 && DECL_STATIC_FUNCTION_P (newdecl
))
1148 /* If the old declaration was `static', or the new one isn't, then
1149 everything is OK. */
1150 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1153 /* It's OK to declare a builtin function as `static'. */
1154 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1155 && DECL_ARTIFICIAL (olddecl
))
1158 if (permerror (DECL_SOURCE_LOCATION (newdecl
),
1159 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1160 inform (input_location
, "previous declaration of %q+D", olddecl
);
1163 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1164 function templates. If their exception specifications do not
1165 match, issue a diagnostic. */
1168 check_redeclaration_exception_specification (tree new_decl
,
1171 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1172 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1174 /* Two default specs are equivalent, don't force evaluation. */
1175 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1176 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1179 maybe_instantiate_noexcept (new_decl
);
1180 maybe_instantiate_noexcept (old_decl
);
1181 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1182 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1186 If any declaration of a function has an exception-specification,
1187 all declarations, including the definition and an explicit
1188 specialization, of that function shall have an
1189 exception-specification with the same set of type-ids. */
1190 if (! DECL_IS_BUILTIN (old_decl
)
1192 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1195 = "declaration of %q+F has a different exception specifier";
1196 bool complained
= true;
1197 if (! DECL_IN_SYSTEM_HEADER (old_decl
))
1198 error (msg
, new_decl
);
1200 complained
= pedwarn (0, OPT_Wsystem_headers
, msg
, new_decl
);
1202 inform (0, "from previous declaration %q+F", old_decl
);
1206 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1207 Otherwise issue diagnostics. */
1210 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1212 old_decl
= STRIP_TEMPLATE (old_decl
);
1213 new_decl
= STRIP_TEMPLATE (new_decl
);
1214 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1215 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1217 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1218 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1220 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1222 if (DECL_BUILT_IN (old_decl
))
1224 /* Hide a built-in declaration. */
1225 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1226 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1229 /* 7.1.5 [dcl.constexpr]
1230 Note: An explicit specialization can differ from the template
1231 declaration with respect to the constexpr specifier. */
1232 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1233 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1236 error ("redeclaration %q+D differs in %<constexpr%>", new_decl
);
1237 error ("from previous declaration %q+D", old_decl
);
1243 /* DECL is a redeclaration of a function or function template. If
1244 it does have default arguments issue a diagnostic. Note: this
1245 function is used to enforce the requirements in C++11 8.3.6 about
1246 no default arguments in redeclarations. */
1249 check_redeclaration_no_default_args (tree decl
)
1251 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1253 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1254 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1255 if (TREE_PURPOSE (t
))
1257 permerror (input_location
,
1258 "redeclaration of %q+#D may not have default "
1264 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1265 && lookup_attribute ("gnu_inline", \
1266 DECL_ATTRIBUTES (fn)))
1268 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1269 If the redeclaration is invalid, a diagnostic is issued, and the
1270 error_mark_node is returned. Otherwise, OLDDECL is returned.
1272 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1275 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1278 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1280 unsigned olddecl_uid
= DECL_UID (olddecl
);
1281 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1282 int new_defines_function
= 0;
1283 tree new_template_info
;
1285 if (newdecl
== olddecl
)
1288 types_match
= decls_match (newdecl
, olddecl
);
1290 /* If either the type of the new decl or the type of the old decl is an
1291 error_mark_node, then that implies that we have already issued an
1292 error (earlier) for some bogus type specification, and in that case,
1293 it is rather pointless to harass the user with yet more error message
1294 about the same declaration, so just pretend the types match here. */
1295 if (TREE_TYPE (newdecl
) == error_mark_node
1296 || TREE_TYPE (olddecl
) == error_mark_node
)
1297 return error_mark_node
;
1299 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1300 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1302 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1303 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1304 && check_raw_literal_operator (olddecl
))
1305 error ("literal operator template %q+D conflicts with"
1306 " raw literal operator %qD", newdecl
, olddecl
);
1307 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1308 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1309 && check_raw_literal_operator (newdecl
))
1310 error ("raw literal operator %q+D conflicts with"
1311 " literal operator template %qD", newdecl
, olddecl
);
1314 if (DECL_P (olddecl
)
1315 && TREE_CODE (newdecl
) == FUNCTION_DECL
1316 && TREE_CODE (olddecl
) == FUNCTION_DECL
1317 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1319 if (DECL_DECLARED_INLINE_P (newdecl
)
1320 && DECL_UNINLINABLE (newdecl
)
1321 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1322 /* Already warned elsewhere. */;
1323 else if (DECL_DECLARED_INLINE_P (olddecl
)
1324 && DECL_UNINLINABLE (olddecl
)
1325 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1326 /* Already warned. */;
1327 else if (DECL_DECLARED_INLINE_P (newdecl
)
1328 && DECL_UNINLINABLE (olddecl
)
1329 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1331 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1333 inform (DECL_SOURCE_LOCATION (olddecl
),
1334 "previous declaration of %qD with attribute noinline",
1337 else if (DECL_DECLARED_INLINE_P (olddecl
)
1338 && DECL_UNINLINABLE (newdecl
)
1339 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1341 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1342 "attribute noinline", newdecl
))
1343 inform (DECL_SOURCE_LOCATION (olddecl
),
1344 "previous declaration of %qD was inline",
1349 /* Check for redeclaration and other discrepancies. */
1350 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1351 && DECL_ARTIFICIAL (olddecl
))
1353 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1354 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1356 /* Avoid warnings redeclaring built-ins which have not been
1357 explicitly declared. */
1358 if (DECL_ANTICIPATED (olddecl
))
1361 /* If you declare a built-in or predefined function name as static,
1362 the old definition is overridden, but optionally warn this was a
1363 bad choice of name. */
1364 if (! TREE_PUBLIC (newdecl
))
1366 warning (OPT_Wshadow
,
1367 DECL_BUILT_IN (olddecl
)
1368 ? G_("shadowing built-in function %q#D")
1369 : G_("shadowing library function %q#D"), olddecl
);
1370 /* Discard the old built-in function. */
1373 /* If the built-in is not ansi, then programs can override
1374 it even globally without an error. */
1375 else if (! DECL_BUILT_IN (olddecl
))
1376 warning (0, "library function %q#D redeclared as non-function %q+#D",
1379 error ("declaration of %q+#D conflicts with built-in "
1380 "declaration %q#D", newdecl
, olddecl
);
1383 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1385 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1386 error_at (DECL_SOURCE_LOCATION (newdecl
),
1387 "redeclaration of %<pragma omp declare reduction%>");
1388 inform (DECL_SOURCE_LOCATION (olddecl
),
1389 "previous %<pragma omp declare reduction%> declaration");
1390 return error_mark_node
;
1392 else if (!types_match
)
1394 /* Avoid warnings redeclaring built-ins which have not been
1395 explicitly declared. */
1396 if (DECL_ANTICIPATED (olddecl
))
1398 /* Deal with fileptr_type_node. FILE type is not known
1399 at the time we create the builtins. */
1402 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1403 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1405 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1408 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1410 tree t
= TREE_VALUE (t1
);
1413 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1414 == get_identifier ("FILE")
1415 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1417 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1419 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1420 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1421 types_match
= decls_match (newdecl
, olddecl
);
1423 return duplicate_decls (newdecl
, olddecl
,
1425 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1428 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1431 else if ((DECL_EXTERN_C_P (newdecl
)
1432 && DECL_EXTERN_C_P (olddecl
))
1433 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1434 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1436 /* A near match; override the builtin. */
1438 if (TREE_PUBLIC (newdecl
))
1439 warning (0, "new declaration %q+#D ambiguates built-in "
1440 "declaration %q#D", newdecl
, olddecl
);
1442 warning (OPT_Wshadow
,
1443 DECL_BUILT_IN (olddecl
)
1444 ? G_("shadowing built-in function %q#D")
1445 : G_("shadowing library function %q#D"), olddecl
);
1448 /* Discard the old built-in function. */
1451 /* Replace the old RTL to avoid problems with inlining. */
1452 COPY_DECL_RTL (newdecl
, olddecl
);
1454 /* Even if the types match, prefer the new declarations type for
1455 built-ins which have not been explicitly declared, for
1456 exception lists, etc... */
1457 else if (DECL_IS_BUILTIN (olddecl
))
1459 tree type
= TREE_TYPE (newdecl
);
1460 tree attribs
= (*targetm
.merge_type_attributes
)
1461 (TREE_TYPE (olddecl
), type
);
1463 type
= cp_build_type_attribute_variant (type
, attribs
);
1464 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1467 /* If a function is explicitly declared "throw ()", propagate that to
1468 the corresponding builtin. */
1469 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1470 && DECL_ANTICIPATED (olddecl
)
1471 && TREE_NOTHROW (newdecl
)
1472 && !TREE_NOTHROW (olddecl
))
1474 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1475 tree tmpdecl
= builtin_decl_explicit (fncode
);
1476 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1477 TREE_NOTHROW (tmpdecl
) = 1;
1480 /* Whether or not the builtin can throw exceptions has no
1481 bearing on this declarator. */
1482 TREE_NOTHROW (olddecl
) = 0;
1484 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1486 /* If a builtin function is redeclared as `static', merge
1487 the declarations, but make the original one static. */
1488 DECL_THIS_STATIC (olddecl
) = 1;
1489 TREE_PUBLIC (olddecl
) = 0;
1491 /* Make the old declaration consistent with the new one so
1492 that all remnants of the builtin-ness of this function
1493 will be banished. */
1494 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1495 COPY_DECL_RTL (newdecl
, olddecl
);
1498 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1500 /* C++ Standard, 3.3, clause 4:
1501 "[Note: a namespace name or a class template name must be unique
1502 in its declarative region (7.3.2, clause 14). ]" */
1503 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1504 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1505 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1506 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1507 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1508 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1510 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1511 && TREE_CODE (newdecl
) != TYPE_DECL
)
1512 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1513 && TREE_CODE (olddecl
) != TYPE_DECL
))
1515 /* We do nothing special here, because C++ does such nasty
1516 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1517 get shadowed, and know that if we need to find a TYPE_DECL
1518 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1519 slot of the identifier. */
1523 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1524 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1525 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1526 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1530 error ("%q#D redeclared as different kind of symbol", newdecl
);
1531 if (TREE_CODE (olddecl
) == TREE_LIST
)
1532 olddecl
= TREE_VALUE (olddecl
);
1533 inform (DECL_SOURCE_LOCATION (olddecl
),
1534 "previous declaration %q#D", olddecl
);
1536 return error_mark_node
;
1538 else if (!types_match
)
1540 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1541 /* These are certainly not duplicate declarations; they're
1542 from different scopes. */
1545 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1547 /* The name of a class template may not be declared to refer to
1548 any other template, class, function, object, namespace, value,
1549 or type in the same scope. */
1550 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1551 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1553 error ("conflicting declaration of template %q+#D", newdecl
);
1554 inform (DECL_SOURCE_LOCATION (olddecl
),
1555 "previous declaration %q#D", olddecl
);
1556 return error_mark_node
;
1558 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1559 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1560 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1561 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1562 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1563 DECL_TEMPLATE_PARMS (olddecl
))
1564 /* Template functions can be disambiguated by
1566 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1567 TREE_TYPE (TREE_TYPE (olddecl
))))
1569 error ("ambiguating new declaration %q+#D", newdecl
);
1570 inform (DECL_SOURCE_LOCATION (olddecl
),
1571 "old declaration %q#D", olddecl
);
1575 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1577 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1579 error ("conflicting declaration of C function %q+#D",
1581 inform (DECL_SOURCE_LOCATION (olddecl
),
1582 "previous declaration %q#D", olddecl
);
1585 /* For function versions, params and types match, but they
1586 are not ambiguous. */
1587 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1588 && !DECL_FUNCTION_VERSIONED (olddecl
))
1589 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1590 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1592 error ("ambiguating new declaration of %q+#D", newdecl
);
1593 inform (DECL_SOURCE_LOCATION (olddecl
),
1594 "old declaration %q#D", olddecl
);
1595 return error_mark_node
;
1602 error ("conflicting declaration %q+#D", newdecl
);
1603 inform (DECL_SOURCE_LOCATION (olddecl
),
1604 "previous declaration as %q#D", olddecl
);
1605 return error_mark_node
;
1608 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1609 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1610 && (!DECL_TEMPLATE_INFO (newdecl
)
1611 || (DECL_TI_TEMPLATE (newdecl
)
1612 != DECL_TI_TEMPLATE (olddecl
))))
1613 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1614 && (!DECL_TEMPLATE_INFO (olddecl
)
1615 || (DECL_TI_TEMPLATE (olddecl
)
1616 != DECL_TI_TEMPLATE (newdecl
))))))
1617 /* It's OK to have a template specialization and a non-template
1618 with the same type, or to have specializations of two
1619 different templates with the same type. Note that if one is a
1620 specialization, and the other is an instantiation of the same
1621 template, that we do not exit at this point. That situation
1622 can occur if we instantiate a template class, and then
1623 specialize one of its methods. This situation is valid, but
1624 the declarations must be merged in the usual way. */
1626 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1627 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1628 && !DECL_USE_TEMPLATE (newdecl
))
1629 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1630 && !DECL_USE_TEMPLATE (olddecl
))))
1631 /* One of the declarations is a template instantiation, and the
1632 other is not a template at all. That's OK. */
1634 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1636 /* In [namespace.alias] we have:
1638 In a declarative region, a namespace-alias-definition can be
1639 used to redefine a namespace-alias declared in that declarative
1640 region to refer only to the namespace to which it already
1643 Therefore, if we encounter a second alias directive for the same
1644 alias, we can just ignore the second directive. */
1645 if (DECL_NAMESPACE_ALIAS (newdecl
)
1646 && (DECL_NAMESPACE_ALIAS (newdecl
)
1647 == DECL_NAMESPACE_ALIAS (olddecl
)))
1649 /* [namespace.alias]
1651 A namespace-name or namespace-alias shall not be declared as
1652 the name of any other entity in the same declarative region.
1653 A namespace-name defined at global scope shall not be
1654 declared as the name of any other entity in any global scope
1656 error ("conflicting declaration of namespace %q+D", newdecl
);
1657 inform (DECL_SOURCE_LOCATION (olddecl
),
1658 "previous declaration of namespace %qD here", olddecl
);
1659 return error_mark_node
;
1663 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1666 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1667 if (DECL_NAME (olddecl
) != NULL_TREE
)
1668 inform (input_location
,
1669 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1670 ? G_("%q+#D previously defined here")
1671 : G_("%q+#D previously declared here"), olddecl
);
1672 return error_mark_node
;
1674 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1675 && DECL_INITIAL (olddecl
) != NULL_TREE
1676 && !prototype_p (TREE_TYPE (olddecl
))
1677 && prototype_p (TREE_TYPE (newdecl
)))
1679 /* Prototype decl follows defn w/o prototype. */
1680 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1681 "prototype specified for %q+#D", newdecl
))
1682 inform (DECL_SOURCE_LOCATION (olddecl
),
1683 "previous non-prototype definition here");
1685 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1686 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1689 If two declarations of the same function or object
1690 specify different linkage-specifications ..., the program
1691 is ill-formed.... Except for functions with C++ linkage,
1692 a function declaration without a linkage specification
1693 shall not precede the first linkage specification for
1694 that function. A function can be declared without a
1695 linkage specification after an explicit linkage
1696 specification has been seen; the linkage explicitly
1697 specified in the earlier declaration is not affected by
1698 such a function declaration.
1700 DR 563 raises the question why the restrictions on
1701 functions should not also apply to objects. Older
1702 versions of G++ silently ignore the linkage-specification
1710 which is clearly wrong. Therefore, we now treat objects
1712 if (current_lang_depth () == 0)
1714 /* There is no explicit linkage-specification, so we use
1715 the linkage from the previous declaration. */
1716 if (!DECL_LANG_SPECIFIC (newdecl
))
1717 retrofit_lang_decl (newdecl
);
1718 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1722 error ("conflicting declaration of %q+#D with %qL linkage",
1723 newdecl
, DECL_LANGUAGE (newdecl
));
1724 inform (DECL_SOURCE_LOCATION (olddecl
),
1725 "previous declaration with %qL linkage",
1726 DECL_LANGUAGE (olddecl
));
1730 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1732 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1734 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1735 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1736 && (/* grokfndecl passes member function templates too
1737 as FUNCTION_DECLs. */
1738 DECL_TEMPLATE_INFO (olddecl
)
1740 Default arguments for a member function of a class
1741 template shall be specified on the initial declaration
1742 of the member function within the class template. */
1743 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1744 check_redeclaration_no_default_args (newdecl
);
1747 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1748 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1751 for (; t1
&& t1
!= void_list_node
;
1752 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1753 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1755 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1758 if (permerror (input_location
,
1759 "default argument given for parameter "
1760 "%d of %q#D", i
, newdecl
))
1761 inform (DECL_SOURCE_LOCATION (olddecl
),
1762 "previous specification in %q#D here",
1767 error ("default argument given for parameter %d "
1768 "of %q#D", i
, newdecl
);
1769 inform (DECL_SOURCE_LOCATION (olddecl
),
1770 "previous specification in %q#D here",
1778 /* Do not merge an implicit typedef with an explicit one. In:
1782 typedef class A A __attribute__ ((foo));
1784 the attribute should apply only to the typedef. */
1785 if (TREE_CODE (olddecl
) == TYPE_DECL
1786 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1787 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1790 /* If new decl is `static' and an `extern' was seen previously,
1792 warn_extern_redeclared_static (newdecl
, olddecl
);
1794 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1795 return error_mark_node
;
1797 /* We have committed to returning 1 at this point. */
1798 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1800 /* Now that functions must hold information normally held
1801 by field decls, there is extra work to do so that
1802 declaration information does not get destroyed during
1804 if (DECL_VINDEX (olddecl
))
1805 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1806 if (DECL_CONTEXT (olddecl
))
1807 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1808 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1809 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1810 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1811 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1812 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1813 DECL_FINAL_P (newdecl
) |= DECL_FINAL_P (olddecl
);
1814 DECL_OVERRIDE_P (newdecl
) |= DECL_OVERRIDE_P (olddecl
);
1815 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1816 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1817 SET_OVERLOADED_OPERATOR_CODE
1818 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1819 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1821 /* Optionally warn about more than one declaration for the same
1822 name, but don't warn about a function declaration followed by a
1824 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1825 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1826 /* Don't warn about extern decl followed by definition. */
1827 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1828 /* Don't warn about friends, let add_friend take care of it. */
1829 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1830 /* Don't warn about declaration followed by specialization. */
1831 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1832 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1834 if (warning (OPT_Wredundant_decls
,
1835 "redundant redeclaration of %q+D in same scope",
1837 inform (DECL_SOURCE_LOCATION (olddecl
),
1838 "previous declaration of %qD", olddecl
);
1841 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1842 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1844 if (DECL_DELETED_FN (newdecl
))
1846 error ("deleted definition of %q+D", newdecl
);
1847 inform (DECL_SOURCE_LOCATION (olddecl
),
1848 "previous declaration of %qD", olddecl
);
1850 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1854 /* Deal with C++: must preserve virtual function table size. */
1855 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1857 tree newtype
= TREE_TYPE (newdecl
);
1858 tree oldtype
= TREE_TYPE (olddecl
);
1860 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1861 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1862 CLASSTYPE_FRIEND_CLASSES (newtype
)
1863 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1865 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1868 /* Copy all the DECL_... slots specified in the new decl
1869 except for any that we copy here from the old type. */
1870 DECL_ATTRIBUTES (newdecl
)
1871 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1873 if (DECL_DECLARES_FUNCTION_P (olddecl
) && DECL_DECLARES_FUNCTION_P (newdecl
))
1875 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1876 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1877 && DECL_HIDDEN_FRIEND_P (olddecl
)
1878 && newdecl_is_friend
);
1881 DECL_ANTICIPATED (olddecl
) = 0;
1882 DECL_HIDDEN_FRIEND_P (olddecl
) = 0;
1886 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1890 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1891 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1892 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1893 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1894 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1895 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1897 DECL_ATTRIBUTES (old_result
)
1898 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1900 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1902 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1903 declarations of a function template. */
1904 if (DECL_SOURCE_LOCATION (newdecl
)
1905 != DECL_SOURCE_LOCATION (olddecl
))
1906 check_redeclaration_no_default_args (newdecl
);
1908 check_default_args (newdecl
);
1910 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1911 && DECL_INITIAL (new_result
))
1913 if (DECL_INITIAL (old_result
))
1914 DECL_UNINLINABLE (old_result
) = 1;
1916 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1917 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1918 DECL_NOT_REALLY_EXTERN (old_result
)
1919 = DECL_NOT_REALLY_EXTERN (new_result
);
1920 DECL_INTERFACE_KNOWN (old_result
)
1921 = DECL_INTERFACE_KNOWN (new_result
);
1922 DECL_DECLARED_INLINE_P (old_result
)
1923 = DECL_DECLARED_INLINE_P (new_result
);
1924 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1925 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1930 DECL_DECLARED_INLINE_P (old_result
)
1931 |= DECL_DECLARED_INLINE_P (new_result
);
1932 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1933 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1934 check_redeclaration_exception_specification (newdecl
, olddecl
);
1938 /* If the new declaration is a definition, update the file and
1939 line information on the declaration, and also make
1940 the old declaration the same definition. */
1941 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1943 DECL_SOURCE_LOCATION (olddecl
)
1944 = DECL_SOURCE_LOCATION (old_result
)
1945 = DECL_SOURCE_LOCATION (newdecl
);
1946 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1947 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1950 DECL_ARGUMENTS (old_result
)
1951 = DECL_ARGUMENTS (new_result
);
1952 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1953 parm
= DECL_CHAIN (parm
))
1954 DECL_CONTEXT (parm
) = old_result
;
1963 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1964 check_redeclaration_exception_specification (newdecl
, olddecl
);
1966 /* Automatically handles default parameters. */
1967 tree oldtype
= TREE_TYPE (olddecl
);
1970 /* For typedefs use the old type, as the new type's DECL_NAME points
1971 at newdecl, which will be ggc_freed. */
1972 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1975 /* Merge the data types specified in the two decls. */
1976 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1978 if (VAR_P (newdecl
))
1980 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1981 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1982 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1983 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1984 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1985 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1987 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1988 if (DECL_LANG_SPECIFIC (olddecl
)
1989 && CP_DECL_THREADPRIVATE_P (olddecl
))
1991 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1992 if (!DECL_LANG_SPECIFIC (newdecl
))
1993 retrofit_lang_decl (newdecl
);
1995 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1999 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
2001 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2002 check_default_args (newdecl
);
2004 /* Lay the type out, unless already done. */
2005 if (! same_type_p (newtype
, oldtype
)
2006 && TREE_TYPE (newdecl
) != error_mark_node
2007 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2008 layout_type (TREE_TYPE (newdecl
));
2010 if ((VAR_P (newdecl
)
2011 || TREE_CODE (newdecl
) == PARM_DECL
2012 || TREE_CODE (newdecl
) == RESULT_DECL
2013 || TREE_CODE (newdecl
) == FIELD_DECL
2014 || TREE_CODE (newdecl
) == TYPE_DECL
)
2015 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2016 layout_decl (newdecl
, 0);
2018 /* Merge the type qualifiers. */
2019 if (TREE_READONLY (newdecl
))
2020 TREE_READONLY (olddecl
) = 1;
2021 if (TREE_THIS_VOLATILE (newdecl
))
2022 TREE_THIS_VOLATILE (olddecl
) = 1;
2023 if (TREE_NOTHROW (newdecl
))
2024 TREE_NOTHROW (olddecl
) = 1;
2026 /* Merge deprecatedness. */
2027 if (TREE_DEPRECATED (newdecl
))
2028 TREE_DEPRECATED (olddecl
) = 1;
2030 /* Preserve function specific target and optimization options */
2031 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2033 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2034 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2035 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2036 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2038 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2039 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2040 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2041 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2044 /* Merge the initialization information. */
2045 if (DECL_INITIAL (newdecl
) == NULL_TREE
2046 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2048 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2049 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2050 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2052 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2053 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2057 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2059 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2060 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2061 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2062 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2063 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2064 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2065 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2066 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2067 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2068 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2069 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2070 /* Keep the old RTL. */
2071 COPY_DECL_RTL (olddecl
, newdecl
);
2073 else if (VAR_P (newdecl
)
2074 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2076 /* Keep the old RTL. We cannot keep the old RTL if the old
2077 declaration was for an incomplete object and the new
2078 declaration is not since many attributes of the RTL will
2080 COPY_DECL_RTL (olddecl
, newdecl
);
2083 /* If cannot merge, then use the new type and qualifiers,
2084 and don't preserve the old rtl. */
2087 /* Clean out any memory we had of the old declaration. */
2088 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2090 TREE_VALUE (oldstatic
) = error_mark_node
;
2092 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2093 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2094 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2095 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2098 /* Merge the storage class information. */
2099 merge_weak (newdecl
, olddecl
);
2101 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2102 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2103 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2104 if (! DECL_EXTERNAL (olddecl
))
2105 DECL_EXTERNAL (newdecl
) = 0;
2106 if (! DECL_COMDAT (olddecl
))
2107 DECL_COMDAT (newdecl
) = 0;
2109 new_template_info
= NULL_TREE
;
2110 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2112 bool new_redefines_gnu_inline
= false;
2114 if (new_defines_function
2115 && ((DECL_INTERFACE_KNOWN (olddecl
)
2116 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2117 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2118 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2119 == FUNCTION_DECL
))))
2123 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2124 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2126 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2129 if (!new_redefines_gnu_inline
)
2131 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2132 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2133 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2135 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2136 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2137 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2139 /* If the OLDDECL is an instantiation and/or specialization,
2140 then the NEWDECL must be too. But, it may not yet be marked
2141 as such if the caller has created NEWDECL, but has not yet
2142 figured out that it is a redeclaration. */
2143 if (!DECL_USE_TEMPLATE (newdecl
))
2144 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2146 /* Don't really know how much of the language-specific
2147 values we should copy from old to new. */
2148 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2149 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2150 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2151 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2153 if (LANG_DECL_HAS_MIN (newdecl
))
2155 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2156 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2157 if (DECL_TEMPLATE_INFO (newdecl
))
2159 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2160 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2161 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2162 /* Remember the presence of explicit specialization args. */
2163 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2164 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2166 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2168 /* Only functions have these fields. */
2169 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2171 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2172 DECL_BEFRIENDING_CLASSES (newdecl
)
2173 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2174 DECL_BEFRIENDING_CLASSES (olddecl
));
2175 /* DECL_THUNKS is only valid for virtual functions,
2176 otherwise it is a DECL_FRIEND_CONTEXT. */
2177 if (DECL_VIRTUAL_P (newdecl
))
2178 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2180 /* Only variables have this field. */
2181 else if (VAR_P (newdecl
)
2182 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2183 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2186 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2190 /* Merge parameter attributes. */
2191 tree oldarg
, newarg
;
2192 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2193 newarg
= DECL_ARGUMENTS(newdecl
);
2195 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2196 DECL_ATTRIBUTES (newarg
)
2197 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2198 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2201 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2202 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2204 /* If newdecl is not a specialization, then it is not a
2205 template-related function at all. And that means that we
2206 should have exited above, returning 0. */
2207 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2209 if (DECL_ODR_USED (olddecl
))
2210 /* From [temp.expl.spec]:
2212 If a template, a member template or the member of a class
2213 template is explicitly specialized then that
2214 specialization shall be declared before the first use of
2215 that specialization that would cause an implicit
2216 instantiation to take place, in every translation unit in
2217 which such a use occurs. */
2218 error ("explicit specialization of %qD after first use",
2221 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2222 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2223 && DECL_DECLARED_INLINE_P (newdecl
));
2225 /* Don't propagate visibility from the template to the
2226 specialization here. We'll do that in determine_visibility if
2228 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2230 /* [temp.expl.spec/14] We don't inline explicit specialization
2231 just because the primary template says so. */
2233 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2234 the always_inline attribute. */
2235 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2236 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2238 if (DECL_DECLARED_INLINE_P (newdecl
))
2239 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2241 DECL_ATTRIBUTES (newdecl
)
2242 = remove_attribute ("always_inline",
2243 DECL_ATTRIBUTES (newdecl
));
2246 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2248 /* Never inline re-defined extern inline functions.
2249 FIXME: this could be better handled by keeping both
2250 function as separate declarations. */
2251 DECL_UNINLINABLE (newdecl
) = 1;
2255 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2256 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2258 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2260 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2261 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2263 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2264 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2265 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2266 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2269 /* Preserve abstractness on cloned [cd]tors. */
2270 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2272 /* Update newdecl's parms to point at olddecl. */
2273 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2274 parm
= DECL_CHAIN (parm
))
2275 DECL_CONTEXT (parm
) = olddecl
;
2279 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2280 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2281 COPY_DECL_RTL (newdecl
, olddecl
);
2283 if (! types_match
|| new_defines_function
)
2285 /* These need to be copied so that the names are available.
2286 Note that if the types do match, we'll preserve inline
2287 info and other bits, but if not, we won't. */
2288 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2289 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2291 /* If redeclaring a builtin function, it stays built in
2292 if newdecl is a gnu_inline definition, or if newdecl is just
2294 if (DECL_BUILT_IN (olddecl
)
2295 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2297 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2298 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2299 /* If we're keeping the built-in definition, keep the rtl,
2300 regardless of declaration matches. */
2301 COPY_DECL_RTL (olddecl
, newdecl
);
2302 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2304 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2307 /* If a compatible prototype of these builtin functions
2308 is seen, assume the runtime implements it with the
2309 expected semantics. */
2310 case BUILT_IN_STPCPY
:
2311 if (builtin_decl_explicit_p (fncode
))
2312 set_builtin_decl_implicit_p (fncode
, true);
2315 if (builtin_decl_explicit_p (fncode
))
2316 set_builtin_decl_declared_p (fncode
, true);
2321 if (new_defines_function
)
2322 /* If defining a function declared with other language
2323 linkage, use the previously declared language linkage. */
2324 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2325 else if (types_match
)
2327 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2328 /* Don't clear out the arguments if we're just redeclaring a
2330 if (DECL_ARGUMENTS (olddecl
))
2331 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2334 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2335 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2337 /* Now preserve various other info from the definition. */
2338 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2339 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2340 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2341 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2343 /* Warn about conflicting visibility specifications. */
2344 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2345 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2346 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2348 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2349 "%qD: visibility attribute ignored because it "
2350 "conflicts with previous declaration", newdecl
))
2351 inform (DECL_SOURCE_LOCATION (olddecl
),
2352 "previous declaration of %qD", olddecl
);
2354 /* Choose the declaration which specified visibility. */
2355 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2357 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2358 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2360 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2361 so keep this behavior. */
2362 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2364 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2365 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2367 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2368 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2370 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2371 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2373 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2374 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2375 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2377 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2378 with that from NEWDECL below. */
2379 if (DECL_LANG_SPECIFIC (olddecl
))
2381 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2382 != DECL_LANG_SPECIFIC (newdecl
));
2383 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2386 /* Merge the USED information. */
2387 if (TREE_USED (olddecl
))
2388 TREE_USED (newdecl
) = 1;
2389 else if (TREE_USED (newdecl
))
2390 TREE_USED (olddecl
) = 1;
2391 if (VAR_P (newdecl
))
2393 if (DECL_READ_P (olddecl
))
2394 DECL_READ_P (newdecl
) = 1;
2395 else if (DECL_READ_P (newdecl
))
2396 DECL_READ_P (olddecl
) = 1;
2398 if (DECL_PRESERVE_P (olddecl
))
2399 DECL_PRESERVE_P (newdecl
) = 1;
2400 else if (DECL_PRESERVE_P (newdecl
))
2401 DECL_PRESERVE_P (olddecl
) = 1;
2403 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2404 to olddecl and deleted. */
2405 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2406 && DECL_FUNCTION_VERSIONED (olddecl
))
2408 /* Set the flag for newdecl so that it gets copied to olddecl. */
2409 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2410 /* newdecl will be purged after copying to olddecl and is no longer
2412 cgraph_node::delete_function_version (newdecl
);
2415 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2418 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2420 function_size
= sizeof (struct tree_decl_common
);
2422 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2423 (char *) newdecl
+ sizeof (struct tree_common
),
2424 function_size
- sizeof (struct tree_common
));
2426 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2427 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2428 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2430 /* Preserve symtab node mapping. */
2431 olddecl
->decl_with_vis
.symtab_node
= snode
;
2433 if (new_template_info
)
2434 /* If newdecl is a template instantiation, it is possible that
2435 the following sequence of events has occurred:
2437 o A friend function was declared in a class template. The
2438 class template was instantiated.
2440 o The instantiation of the friend declaration was
2441 recorded on the instantiation list, and is newdecl.
2443 o Later, however, instantiate_class_template called pushdecl
2444 on the newdecl to perform name injection. But, pushdecl in
2445 turn called duplicate_decls when it discovered that another
2446 declaration of a global function with the same name already
2449 o Here, in duplicate_decls, we decided to clobber newdecl.
2451 If we're going to do that, we'd better make sure that
2452 olddecl, and not newdecl, is on the list of
2453 instantiations so that if we try to do the instantiation
2454 again we won't get the clobbered declaration. */
2455 reregister_specialization (newdecl
,
2461 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2463 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2464 (char *) newdecl
+ sizeof (struct tree_common
),
2465 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2466 switch (TREE_CODE (newdecl
))
2476 struct symtab_node
*snode
= NULL
;
2479 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
)
2480 || DECL_EXTERNAL (olddecl
)))
2481 snode
= symtab_node::get (olddecl
);
2482 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2483 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2484 size
- sizeof (struct tree_decl_common
)
2485 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2486 if (VAR_P (newdecl
))
2487 olddecl
->decl_with_vis
.symtab_node
= snode
;
2491 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2492 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2493 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2494 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2499 if (VAR_OR_FUNCTION_DECL_P (newdecl
))
2501 if (DECL_EXTERNAL (olddecl
)
2502 || TREE_PUBLIC (olddecl
)
2503 || TREE_STATIC (olddecl
))
2505 /* Merge the section attribute.
2506 We want to issue an error if the sections conflict but that must be
2507 done later in decl_attributes since we are called before attributes
2509 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2510 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2512 if (DECL_ONE_ONLY (newdecl
))
2514 struct symtab_node
*oldsym
, *newsym
;
2515 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2516 oldsym
= cgraph_node::get_create (olddecl
);
2518 oldsym
= varpool_node::get_create (olddecl
);
2519 newsym
= symtab_node::get (newdecl
);
2520 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2525 && CP_DECL_THREAD_LOCAL_P (newdecl
))
2527 CP_DECL_THREAD_LOCAL_P (olddecl
) = true;
2528 if (!processing_template_decl
)
2529 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2533 DECL_UID (olddecl
) = olddecl_uid
;
2535 DECL_FRIEND_P (olddecl
) = 1;
2538 DECL_ANTICIPATED (olddecl
) = 1;
2539 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2542 /* NEWDECL contains the merged attribute lists.
2543 Update OLDDECL to be the same. */
2544 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2546 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2547 so that encode_section_info has a chance to look at the new decl
2548 flags and attributes. */
2549 if (DECL_RTL_SET_P (olddecl
)
2550 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2552 && TREE_STATIC (olddecl
))))
2553 make_decl_rtl (olddecl
);
2555 /* The NEWDECL will no longer be needed. Because every out-of-class
2556 declaration of a member results in a call to duplicate_decls,
2557 freeing these nodes represents in a significant savings.
2559 Before releasing the node, be sore to remove function from symbol
2560 table that might have been inserted there to record comdat group.
2561 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2562 structure is shared in between newdecl and oldecl. */
2563 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2564 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2565 if (VAR_OR_FUNCTION_DECL_P (newdecl
))
2567 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2576 /* Return zero if the declaration NEWDECL is valid
2577 when the declaration OLDDECL (assumed to be for the same name)
2578 has already been seen.
2579 Otherwise return an error message format string with a %s
2580 where the identifier should go. */
2583 redeclaration_error_message (tree newdecl
, tree olddecl
)
2585 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2587 /* Because C++ can put things into name space for free,
2588 constructs like "typedef struct foo { ... } foo"
2589 would look like an erroneous redeclaration. */
2590 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2593 return G_("redefinition of %q#D");
2595 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2597 /* If this is a pure function, its olddecl will actually be
2598 the original initialization to `0' (which we force to call
2599 abort()). Don't complain about redefinition in this case. */
2600 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2601 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2604 /* If both functions come from different namespaces, this is not
2605 a redeclaration - this is a conflict with a used function. */
2606 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2607 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2608 && ! decls_match (olddecl
, newdecl
))
2609 return G_("%qD conflicts with used function");
2611 /* We'll complain about linkage mismatches in
2612 warn_extern_redeclared_static. */
2614 /* Defining the same name twice is no good. */
2615 if (DECL_INITIAL (olddecl
) != NULL_TREE
2616 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2618 if (DECL_NAME (olddecl
) == NULL_TREE
)
2619 return G_("%q#D not declared in class");
2620 else if (!GNU_INLINE_P (olddecl
)
2621 || GNU_INLINE_P (newdecl
))
2622 return G_("redefinition of %q#D");
2625 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2627 bool olda
= GNU_INLINE_P (olddecl
);
2628 bool newa
= GNU_INLINE_P (newdecl
);
2633 return G_("%q+D redeclared inline with "
2634 "%<gnu_inline%> attribute");
2636 return G_("%q+D redeclared inline without "
2637 "%<gnu_inline%> attribute");
2641 check_abi_tag_redeclaration
2642 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2643 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2647 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2651 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2653 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2654 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2655 return G_("redefinition of %q#D");
2659 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2660 || (DECL_TEMPLATE_RESULT (newdecl
)
2661 == DECL_TEMPLATE_RESULT (olddecl
)))
2664 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2665 if (DECL_TEMPLATE_INFO (nt
))
2666 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2667 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2668 if (DECL_TEMPLATE_INFO (ot
))
2669 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2670 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2671 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2672 return G_("redefinition of %q#D");
2674 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2676 bool olda
= GNU_INLINE_P (ot
);
2677 bool newa
= GNU_INLINE_P (nt
);
2682 return G_("%q+D redeclared inline with "
2683 "%<gnu_inline%> attribute");
2685 return G_("%q+D redeclared inline without "
2686 "%<gnu_inline%> attribute");
2690 /* Core issue #226 (C++0x):
2692 If a friend function template declaration specifies a
2693 default template-argument, that declaration shall be a
2694 definition and shall be the only declaration of the
2695 function template in the translation unit. */
2696 if ((cxx_dialect
!= cxx98
)
2697 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2698 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2699 /*is_primary=*/true,
2700 /*is_partial=*/false,
2701 /*is_friend_decl=*/2))
2702 return G_("redeclaration of friend %q#D "
2703 "may not have default template arguments");
2707 else if (VAR_P (newdecl
)
2708 && CP_DECL_THREAD_LOCAL_P (newdecl
) != CP_DECL_THREAD_LOCAL_P (olddecl
)
2709 && (! DECL_LANG_SPECIFIC (olddecl
)
2710 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2711 || CP_DECL_THREAD_LOCAL_P (newdecl
)))
2713 /* Only variables can be thread-local, and all declarations must
2714 agree on this property. */
2715 if (CP_DECL_THREAD_LOCAL_P (newdecl
))
2716 return G_("thread-local declaration of %q#D follows "
2717 "non-thread-local declaration");
2719 return G_("non-thread-local declaration of %q#D follows "
2720 "thread-local declaration");
2722 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2724 /* The objects have been declared at namespace scope. If either
2725 is a member of an anonymous union, then this is an invalid
2726 redeclaration. For example:
2732 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2733 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2734 return G_("redeclaration of %q#D");
2735 /* If at least one declaration is a reference, there is no
2736 conflict. For example:
2742 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2744 /* Reject two definitions. */
2745 return G_("redefinition of %q#D");
2749 /* Objects declared with block scope: */
2750 /* Reject two definitions, and reject a definition
2751 together with an external reference. */
2752 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2753 return G_("redeclaration of %q#D");
2758 /* Hash and equality functions for the named_label table. */
2761 named_label_hasher::hash (named_label_entry
*ent
)
2763 return DECL_UID (ent
->label_decl
);
2767 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2769 return a
->label_decl
== b
->label_decl
;
2772 /* Create a new label, named ID. */
2775 make_label_decl (tree id
, int local_p
)
2777 struct named_label_entry
*ent
;
2780 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2782 DECL_CONTEXT (decl
) = current_function_decl
;
2783 DECL_MODE (decl
) = VOIDmode
;
2784 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2786 /* Say where one reference is to the label, for the sake of the
2787 error if it is not defined. */
2788 DECL_SOURCE_LOCATION (decl
) = input_location
;
2790 /* Record the fact that this identifier is bound to this label. */
2791 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2793 /* Create the label htab for the function on demand. */
2795 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2797 /* Record this label on the list of labels used in this function.
2798 We do this before calling make_label_decl so that we get the
2799 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2800 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2801 ent
->label_decl
= decl
;
2803 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2804 gcc_assert (*slot
== NULL
);
2810 /* Look for a label named ID in the current function. If one cannot
2811 be found, create one. (We keep track of used, but undefined,
2812 labels, and complain about them at the end of a function.) */
2815 lookup_label_1 (tree id
)
2819 /* You can't use labels at global scope. */
2820 if (current_function_decl
== NULL_TREE
)
2822 error ("label %qE referenced outside of any function", id
);
2826 /* See if we've already got this label. */
2827 decl
= IDENTIFIER_LABEL_VALUE (id
);
2828 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2831 decl
= make_label_decl (id
, /*local_p=*/0);
2835 /* Wrapper for lookup_label_1. */
2838 lookup_label (tree id
)
2841 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2842 ret
= lookup_label_1 (id
);
2843 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2847 /* Declare a local label named ID. */
2850 declare_local_label (tree id
)
2853 cp_label_binding bind
;
2855 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2856 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2857 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2859 decl
= make_label_decl (id
, /*local_p=*/1);
2861 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2866 /* Returns nonzero if it is ill-formed to jump past the declaration of
2867 DECL. Returns 2 if it's also a real problem. */
2870 decl_jump_unsafe (tree decl
)
2872 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2873 with automatic storage duration is not in scope to a point where it is
2874 in scope is ill-formed unless the variable has scalar type, class type
2875 with a trivial default constructor and a trivial destructor, a
2876 cv-qualified version of one of these types, or an array of one of the
2877 preceding types and is declared without an initializer (8.5). */
2878 tree type
= TREE_TYPE (decl
);
2880 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2881 || type
== error_mark_node
)
2884 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2885 || variably_modified_type_p (type
, NULL_TREE
))
2888 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2894 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2897 identify_goto (tree decl
, const location_t
*locus
)
2899 bool complained
= (decl
2900 ? permerror (input_location
, "jump to label %qD", decl
)
2901 : permerror (input_location
, "jump to case label"));
2902 if (complained
&& locus
)
2903 inform (*locus
, " from here");
2907 /* Check that a single previously seen jump to a newly defined label
2908 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2909 the jump context; NAMES are the names in scope in LEVEL at the jump
2910 context; LOCUS is the source position of the jump or 0. Returns
2911 true if all is well. */
2914 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2915 bool exited_omp
, const location_t
*locus
)
2917 cp_binding_level
*b
;
2918 bool identified
= false, complained
= false;
2919 bool saw_eh
= false, saw_omp
= false;
2923 complained
= identify_goto (decl
, locus
);
2925 inform (input_location
, " exits OpenMP structured block");
2926 identified
= saw_omp
= true;
2929 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2931 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2933 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2934 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2935 : TREE_CHAIN (new_decls
)))
2937 int problem
= decl_jump_unsafe (new_decls
);
2943 complained
= identify_goto (decl
, locus
);
2949 inform (input_location
,
2950 " crosses initialization of %q+#D", new_decls
);
2952 inform (input_location
, " enters scope of %q+#D which has "
2953 "non-trivial destructor", new_decls
);
2959 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2963 complained
= identify_goto (decl
, locus
);
2968 if (b
->kind
== sk_try
)
2969 inform (input_location
, " enters try block");
2971 inform (input_location
, " enters catch block");
2975 if (b
->kind
== sk_omp
&& !saw_omp
)
2979 complained
= identify_goto (decl
, locus
);
2983 inform (input_location
, " enters OpenMP structured block");
2992 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2994 check_previous_goto_1 (decl
, use
->binding_level
,
2995 use
->names_in_scope
, use
->in_omp_scope
,
2996 &use
->o_goto_locus
);
3000 check_switch_goto (cp_binding_level
* level
)
3002 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
3005 /* Check that a new jump to a label DECL is OK. Called by
3006 finish_goto_stmt. */
3009 check_goto (tree decl
)
3011 struct named_label_entry
*ent
, dummy
;
3012 bool saw_catch
= false, identified
= false, complained
= false;
3016 /* We can't know where a computed goto is jumping.
3017 So we assume that it's OK. */
3018 if (TREE_CODE (decl
) != LABEL_DECL
)
3021 /* We didn't record any information about this label when we created it,
3022 and there's not much point since it's trivial to analyze as a return. */
3023 if (decl
== cdtor_label
)
3026 dummy
.label_decl
= decl
;
3027 ent
= named_labels
->find (&dummy
);
3028 gcc_assert (ent
!= NULL
);
3030 /* If the label hasn't been defined yet, defer checking. */
3031 if (! DECL_INITIAL (decl
))
3033 struct named_label_use_entry
*new_use
;
3035 /* Don't bother creating another use if the last goto had the
3036 same data, and will therefore create the same set of errors. */
3038 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3041 new_use
= ggc_alloc
<named_label_use_entry
> ();
3042 new_use
->binding_level
= current_binding_level
;
3043 new_use
->names_in_scope
= current_binding_level
->names
;
3044 new_use
->o_goto_locus
= input_location
;
3045 new_use
->in_omp_scope
= false;
3047 new_use
->next
= ent
->uses
;
3048 ent
->uses
= new_use
;
3052 if (ent
->in_try_scope
|| ent
->in_catch_scope
3053 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3055 complained
= permerror (input_location
, "jump to label %q+D", decl
);
3057 inform (input_location
, " from here");
3061 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3063 int u
= decl_jump_unsafe (bad
);
3065 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3067 /* Can't skip init of __exception_info. */
3069 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3072 else if (complained
)
3075 inform (input_location
, " skips initialization of %q+#D", bad
);
3077 inform (input_location
, " enters scope of %q+#D which has "
3078 "non-trivial destructor", bad
);
3084 if (ent
->in_try_scope
)
3085 inform (input_location
, " enters try block");
3086 else if (ent
->in_catch_scope
&& !saw_catch
)
3087 inform (input_location
, " enters catch block");
3090 if (ent
->in_omp_scope
)
3093 inform (input_location
, " enters OpenMP structured block");
3095 else if (flag_openmp
)
3097 cp_binding_level
*b
;
3098 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3100 if (b
== ent
->binding_level
)
3102 if (b
->kind
== sk_omp
)
3106 complained
= permerror (input_location
,
3107 "jump to label %q+D", decl
);
3109 inform (input_location
, " from here");
3113 inform (input_location
, " exits OpenMP structured block");
3120 /* Check that a return is ok wrt OpenMP structured blocks.
3121 Called by finish_return_stmt. Returns true if all is well. */
3124 check_omp_return (void)
3126 cp_binding_level
*b
;
3127 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3128 if (b
->kind
== sk_omp
)
3130 error ("invalid exit from OpenMP structured block");
3133 else if (b
->kind
== sk_function_parms
)
3138 /* Define a label, specifying the location in the source file.
3139 Return the LABEL_DECL node for the label. */
3142 define_label_1 (location_t location
, tree name
)
3144 struct named_label_entry
*ent
, dummy
;
3145 cp_binding_level
*p
;
3148 decl
= lookup_label (name
);
3150 dummy
.label_decl
= decl
;
3151 ent
= named_labels
->find (&dummy
);
3152 gcc_assert (ent
!= NULL
);
3154 /* After labels, make any new cleanups in the function go into their
3155 own new (temporary) binding contour. */
3156 for (p
= current_binding_level
;
3157 p
->kind
!= sk_function_parms
;
3159 p
->more_cleanups_ok
= 0;
3161 if (name
== get_identifier ("wchar_t"))
3162 permerror (input_location
, "label named wchar_t");
3164 if (DECL_INITIAL (decl
) != NULL_TREE
)
3166 error ("duplicate label %qD", decl
);
3167 return error_mark_node
;
3171 struct named_label_use_entry
*use
;
3173 /* Mark label as having been defined. */
3174 DECL_INITIAL (decl
) = error_mark_node
;
3175 /* Say where in the source. */
3176 DECL_SOURCE_LOCATION (decl
) = location
;
3178 ent
->binding_level
= current_binding_level
;
3179 ent
->names_in_scope
= current_binding_level
->names
;
3181 for (use
= ent
->uses
; use
; use
= use
->next
)
3182 check_previous_goto (decl
, use
);
3189 /* Wrapper for define_label_1. */
3192 define_label (location_t location
, tree name
)
3195 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3196 ret
= define_label_1 (location
, name
);
3197 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3204 cp_binding_level
*level
;
3205 struct cp_switch
*next
;
3206 /* The SWITCH_STMT being built. */
3208 /* A splay-tree mapping the low element of a case range to the high
3209 element, or NULL_TREE if there is no high element. Used to
3210 determine whether or not a new case label duplicates an old case
3211 label. We need a tree, rather than simply a hash table, because
3212 of the GNU case range extension. */
3214 /* Remember whether there was a case value that is outside the
3215 range of the original type of the controlling expression. */
3216 bool outside_range_p
;
3219 /* A stack of the currently active switch statements. The innermost
3220 switch statement is on the top of the stack. There is no need to
3221 mark the stack for garbage collection because it is only active
3222 during the processing of the body of a function, and we never
3223 collect at that point. */
3225 static struct cp_switch
*switch_stack
;
3227 /* Called right after a switch-statement condition is parsed.
3228 SWITCH_STMT is the switch statement being parsed. */
3231 push_switch (tree switch_stmt
)
3233 struct cp_switch
*p
= XNEW (struct cp_switch
);
3234 p
->level
= current_binding_level
;
3235 p
->next
= switch_stack
;
3236 p
->switch_stmt
= switch_stmt
;
3237 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3238 p
->outside_range_p
= false;
3245 struct cp_switch
*cs
= switch_stack
;
3246 location_t switch_location
;
3248 /* Emit warnings as needed. */
3249 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3250 const bool bool_cond_p
3251 = (SWITCH_STMT_TYPE (cs
->switch_stmt
)
3252 && TREE_CODE (SWITCH_STMT_TYPE (cs
->switch_stmt
)) == BOOLEAN_TYPE
);
3253 if (!processing_template_decl
)
3254 c_do_switch_warnings (cs
->cases
, switch_location
,
3255 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3256 SWITCH_STMT_COND (cs
->switch_stmt
),
3257 bool_cond_p
, cs
->outside_range_p
);
3259 splay_tree_delete (cs
->cases
);
3260 switch_stack
= switch_stack
->next
;
3264 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3265 condition. Note that if TYPE and VALUE are already integral we don't
3266 really do the conversion because the language-independent
3267 warning/optimization code will work better that way. */
3270 case_conversion (tree type
, tree value
)
3272 if (value
== NULL_TREE
)
3275 if (cxx_dialect
>= cxx11
3276 && (SCOPED_ENUM_P (type
)
3277 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3279 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3280 type
= type_promotes_to (type
);
3281 value
= (perform_implicit_conversion_flags
3282 (type
, value
, tf_warning_or_error
,
3283 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3285 return cxx_constant_value (value
);
3288 /* Note that we've seen a definition of a case label, and complain if this
3289 is a bad place for one. */
3292 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3295 cp_binding_level
*p
;
3298 if (processing_template_decl
)
3302 /* For templates, just add the case label; we'll do semantic
3303 analysis at instantiation-time. */
3304 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3305 return add_stmt (build_case_label (low_value
, high_value
, label
));
3308 /* Find the condition on which this switch statement depends. */
3309 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3310 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3311 cond
= TREE_VALUE (cond
);
3313 if (!check_switch_goto (switch_stack
->level
))
3314 return error_mark_node
;
3316 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3318 low_value
= case_conversion (type
, low_value
);
3319 high_value
= case_conversion (type
, high_value
);
3321 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3322 low_value
, high_value
,
3323 &switch_stack
->outside_range_p
);
3325 /* After labels, make any new cleanups in the function go into their
3326 own new (temporary) binding contour. */
3327 for (p
= current_binding_level
;
3328 p
->kind
!= sk_function_parms
;
3330 p
->more_cleanups_ok
= 0;
3335 struct typename_info
{
3343 struct typename_hasher
: ggc_ptr_hash
<tree_node
>
3345 typedef typename_info
*compare_type
;
3347 /* Hash a TYPENAME_TYPE. */
3354 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3355 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3360 /* Compare two TYPENAME_TYPEs. */
3363 equal (tree t1
, const typename_info
*t2
)
3365 return (TYPE_IDENTIFIER (t1
) == t2
->name
3366 && TYPE_CONTEXT (t1
) == t2
->scope
3367 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3368 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3369 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3373 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3374 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3376 Returns the new TYPENAME_TYPE. */
3378 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3381 build_typename_type (tree context
, tree name
, tree fullname
,
3382 enum tag_types tag_type
)
3390 if (typename_htab
== NULL
)
3391 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3393 ti
.scope
= FROB_CONTEXT (context
);
3395 ti
.template_id
= fullname
;
3396 ti
.enum_p
= tag_type
== enum_type
;
3397 ti
.class_p
= (tag_type
== class_type
3398 || tag_type
== record_type
3399 || tag_type
== union_type
);
3400 hash
= (htab_hash_pointer (ti
.scope
)
3401 ^ htab_hash_pointer (ti
.name
));
3403 /* See if we already have this type. */
3404 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3409 /* Build the TYPENAME_TYPE. */
3410 t
= cxx_make_type (TYPENAME_TYPE
);
3411 TYPE_CONTEXT (t
) = ti
.scope
;
3412 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3413 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3414 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3416 /* Build the corresponding TYPE_DECL. */
3417 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3418 TYPE_NAME (TREE_TYPE (d
)) = d
;
3419 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3420 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3421 DECL_ARTIFICIAL (d
) = 1;
3423 /* Store it in the hash table. */
3426 /* TYPENAME_TYPEs must always be compared structurally, because
3427 they may or may not resolve down to another type depending on
3428 the currently open classes. */
3429 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3435 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3436 provided to name the type. Returns an appropriate type, unless an
3437 error occurs, in which case error_mark_node is returned. If we
3438 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3439 return that, rather than the _TYPE it corresponds to, in other
3440 cases we look through the type decl. If TF_ERROR is set, complain
3441 about errors, otherwise be quiet. */
3444 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3445 tsubst_flags_t complain
)
3451 if (name
== error_mark_node
3452 || context
== NULL_TREE
3453 || context
== error_mark_node
)
3454 return error_mark_node
;
3458 if (!(TYPE_LANG_SPECIFIC (name
)
3459 && (CLASSTYPE_IS_TEMPLATE (name
)
3460 || CLASSTYPE_USE_TEMPLATE (name
))))
3461 name
= TYPE_IDENTIFIER (name
);
3463 /* Create a TEMPLATE_ID_EXPR for the type. */
3464 name
= build_nt (TEMPLATE_ID_EXPR
,
3465 CLASSTYPE_TI_TEMPLATE (name
),
3466 CLASSTYPE_TI_ARGS (name
));
3468 else if (TREE_CODE (name
) == TYPE_DECL
)
3469 name
= DECL_NAME (name
);
3473 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3475 name
= TREE_OPERAND (name
, 0);
3476 if (DECL_TYPE_TEMPLATE_P (name
))
3477 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3478 if (TREE_CODE (name
) != IDENTIFIER_NODE
)
3480 if (complain
& tf_error
)
3481 error ("%qD is not a type", name
);
3482 return error_mark_node
;
3485 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3487 if (complain
& tf_error
)
3488 error ("%qD used without template parameters", name
);
3489 return error_mark_node
;
3491 gcc_assert (identifier_p (name
));
3492 gcc_assert (TYPE_P (context
));
3494 if (!MAYBE_CLASS_TYPE_P (context
))
3496 if (complain
& tf_error
)
3497 error ("%q#T is not a class", context
);
3498 return error_mark_node
;
3501 /* When the CONTEXT is a dependent type, NAME could refer to a
3502 dependent base class of CONTEXT. But look inside it anyway
3503 if CONTEXT is a currently open scope, in case it refers to a
3504 member of the current instantiation or a non-dependent base;
3505 lookup will stop when we hit a dependent base. */
3506 if (!dependent_scope_p (context
))
3507 /* We should only set WANT_TYPE when we're a nested typename type.
3508 Then we can give better diagnostics if we find a non-type. */
3509 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3513 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3514 return build_typename_type (context
, name
, fullname
, tag_type
);
3516 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3520 if (complain
& tf_error
)
3521 error (want_template
? G_("no class template named %q#T in %q#T")
3522 : G_("no type named %q#T in %q#T"), name
, context
);
3523 return error_mark_node
;
3526 /* Pull out the template from an injected-class-name (or multiple). */
3528 t
= maybe_get_template_decl_from_type_decl (t
);
3530 if (TREE_CODE (t
) == TREE_LIST
)
3532 if (complain
& tf_error
)
3534 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3535 print_candidates (t
);
3537 return error_mark_node
;
3540 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3542 if (complain
& tf_error
)
3543 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3545 return error_mark_node
;
3547 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3549 if (complain
& tf_error
)
3550 error ("%<typename %T::%D%> names %q#T, which is not a type",
3552 return error_mark_node
;
3555 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3556 return error_mark_node
;
3558 /* If we are currently parsing a template and if T is a typedef accessed
3559 through CONTEXT then we need to remember and check access of T at
3560 template instantiation time. */
3561 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3564 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3566 /*entering_scope=*/0,
3567 complain
| tf_user
);
3569 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3572 maybe_record_typedef_use (t
);
3577 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3578 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3579 in which case error_mark_node is returned.
3581 If PARM_LIST is non-NULL, also make sure that the template parameter
3582 list of TEMPLATE_DECL matches.
3584 If COMPLAIN zero, don't complain about any errors that occur. */
3587 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3588 tsubst_flags_t complain
)
3594 name
= TYPE_IDENTIFIER (name
);
3595 else if (DECL_P (name
))
3596 name
= DECL_NAME (name
);
3597 gcc_assert (identifier_p (name
));
3599 if (!dependent_type_p (context
)
3600 || currently_open_class (context
))
3602 tree tmpl
= NULL_TREE
;
3604 if (MAYBE_CLASS_TYPE_P (context
))
3605 tmpl
= lookup_field (context
, name
, 0, false);
3607 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3608 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3610 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3612 if (complain
& tf_error
)
3613 error ("no class template named %q#T in %q#T", name
, context
);
3614 return error_mark_node
;
3618 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3620 if (complain
& tf_error
)
3622 error ("template parameters do not match template %qD", tmpl
);
3623 inform (DECL_SOURCE_LOCATION (tmpl
),
3624 "%qD declared here", tmpl
);
3626 return error_mark_node
;
3629 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3631 return error_mark_node
;
3636 /* Build the UNBOUND_CLASS_TEMPLATE. */
3637 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3638 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3639 TREE_TYPE (t
) = NULL_TREE
;
3640 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3642 /* Build the corresponding TEMPLATE_DECL. */
3643 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3644 TYPE_NAME (TREE_TYPE (d
)) = d
;
3645 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3646 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3647 DECL_ARTIFICIAL (d
) = 1;
3648 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3655 /* Push the declarations of builtin types into the namespace.
3656 RID_INDEX is the index of the builtin type in the array
3657 RID_POINTERS. NAME is the name used when looking up the builtin
3658 type. TYPE is the _TYPE node for the builtin type. */
3661 record_builtin_type (enum rid rid_index
,
3665 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3666 tree tdecl
= NULL_TREE
;
3668 if ((int) rid_index
< (int) RID_MAX
)
3669 rname
= ridpointers
[(int) rid_index
];
3671 tname
= get_identifier (name
);
3673 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3674 eliminated. Built-in types should not be looked up name; their
3675 names are keywords that the parser can recognize. However, there
3676 is code in c-common.c that uses identifier_global_value to look
3677 up built-in types by name. */
3680 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3681 DECL_ARTIFICIAL (tdecl
) = 1;
3682 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3688 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3689 DECL_ARTIFICIAL (tdecl
) = 1;
3691 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3694 if (!TYPE_NAME (type
))
3695 TYPE_NAME (type
) = tdecl
;
3698 debug_hooks
->type_decl (tdecl
, 0);
3701 /* Record one of the standard Java types.
3702 * Declare it as having the given NAME.
3703 * If SIZE > 0, it is the size of one of the integral types;
3704 * otherwise it is the negative of the size of one of the other types. */
3707 record_builtin_java_type (const char* name
, int size
)
3712 type
= build_nonstandard_integer_type (size
, 0);
3713 type
= build_distinct_type_copy (type
);
3715 else if (size
> -32)
3718 /* "__java_char" or ""__java_boolean". */
3719 type
= build_nonstandard_integer_type (-size
, 1);
3720 type
= build_distinct_type_copy (type
);
3721 /* Get the signed type cached and attached to the unsigned type,
3722 so it doesn't get garbage-collected at "random" times,
3723 causing potential codegen differences out of different UIDs
3724 and different alias set numbers. */
3725 stype
= build_nonstandard_integer_type (-size
, 0);
3726 stype
= build_distinct_type_copy (stype
);
3727 TREE_CHAIN (type
) = stype
;
3728 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3731 { /* "__java_float" or ""__java_double". */
3732 type
= make_node (REAL_TYPE
);
3733 TYPE_PRECISION (type
) = - size
;
3736 record_builtin_type (RID_MAX
, name
, type
);
3737 decl
= TYPE_NAME (type
);
3739 /* Suppress generate debug symbol entries for these types,
3740 since for normal C++ they are just clutter.
3741 However, push_lang_context undoes this if extern "Java" is seen. */
3742 DECL_IGNORED_P (decl
) = 1;
3744 TYPE_FOR_JAVA (type
) = 1;
3748 /* Push a type into the namespace so that the back ends ignore it. */
3751 record_unknown_type (tree type
, const char* name
)
3753 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3754 TYPE_DECL
, get_identifier (name
), type
));
3755 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3756 DECL_IGNORED_P (decl
) = 1;
3757 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3758 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3759 TYPE_ALIGN (type
) = 1;
3760 TYPE_USER_ALIGN (type
) = 0;
3761 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3764 /* A string for which we should create an IDENTIFIER_NODE at
3767 typedef struct predefined_identifier
3769 /* The name of the identifier. */
3770 const char *const name
;
3771 /* The place where the IDENTIFIER_NODE should be stored. */
3773 /* Nonzero if this is the name of a constructor or destructor. */
3774 const int ctor_or_dtor_p
;
3775 } predefined_identifier
;
3777 /* Create all the predefined identifiers. */
3780 initialize_predefined_identifiers (void)
3782 const predefined_identifier
*pid
;
3784 /* A table of identifiers to create at startup. */
3785 static const predefined_identifier predefined_identifiers
[] = {
3786 { "C++", &lang_name_cplusplus
, 0 },
3787 { "C", &lang_name_c
, 0 },
3788 { "Java", &lang_name_java
, 0 },
3789 /* Some of these names have a trailing space so that it is
3790 impossible for them to conflict with names written by users. */
3791 { "__ct ", &ctor_identifier
, 1 },
3792 { "__base_ctor ", &base_ctor_identifier
, 1 },
3793 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3794 { "__dt ", &dtor_identifier
, 1 },
3795 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3796 { "__base_dtor ", &base_dtor_identifier
, 1 },
3797 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3798 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3799 { "nelts", &nelts_identifier
, 0 },
3800 { THIS_NAME
, &this_identifier
, 0 },
3801 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3802 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3803 { "_vptr", &vptr_identifier
, 0 },
3804 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3805 { "::", &global_scope_name
, 0 },
3806 { "std", &std_identifier
, 0 },
3810 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3812 *pid
->node
= get_identifier (pid
->name
);
3813 if (pid
->ctor_or_dtor_p
)
3814 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3818 /* Create the predefined scalar types of C,
3819 and some nodes representing standard constants (0, 1, (void *)0).
3820 Initialize the global binding level.
3821 Make definitions for built-in primitive functions. */
3824 cxx_init_decl_processing (void)
3827 tree void_ftype_ptr
;
3829 /* Create all the identifiers we need. */
3830 initialize_predefined_identifiers ();
3832 /* Create the global variables. */
3833 push_to_top_level ();
3835 current_function_decl
= NULL_TREE
;
3836 current_binding_level
= NULL
;
3837 /* Enter the global namespace. */
3838 gcc_assert (global_namespace
== NULL_TREE
);
3839 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3841 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3842 debug_hooks
->register_main_translation_unit
3843 (DECL_CONTEXT (global_namespace
));
3844 TREE_PUBLIC (global_namespace
) = 1;
3845 begin_scope (sk_namespace
, global_namespace
);
3847 if (flag_visibility_ms_compat
)
3848 default_visibility
= VISIBILITY_HIDDEN
;
3851 current_lang_name
= lang_name_c
;
3853 /* Create the `std' namespace. */
3854 push_namespace (std_identifier
);
3855 std_node
= current_namespace
;
3858 c_common_nodes_and_builtins ();
3860 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3861 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3862 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3863 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3864 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3865 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3866 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3867 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3869 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3871 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3872 truthvalue_type_node
= boolean_type_node
;
3873 truthvalue_false_node
= boolean_false_node
;
3874 truthvalue_true_node
= boolean_true_node
;
3876 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3877 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3878 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3881 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3884 delta_type_node
= ptrdiff_type_node
;
3885 vtable_index_type
= ptrdiff_type_node
;
3887 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3888 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3889 void_ftype_ptr
= build_function_type_list (void_type_node
,
3890 ptr_type_node
, NULL_TREE
);
3892 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3894 /* C++ extensions */
3896 unknown_type_node
= make_node (LANG_TYPE
);
3897 record_unknown_type (unknown_type_node
, "unknown type");
3899 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3900 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3902 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3904 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3905 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3907 init_list_type_node
= make_node (LANG_TYPE
);
3908 record_unknown_type (init_list_type_node
, "init list");
3911 /* Make sure we get a unique function type, so we can give
3912 its pointer type a name. (This wins for gdb.) */
3913 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3914 TREE_TYPE (vfunc_type
) = integer_type_node
;
3915 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3916 layout_type (vfunc_type
);
3918 vtable_entry_type
= build_pointer_type (vfunc_type
);
3920 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3923 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3924 layout_type (vtbl_type_node
);
3925 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3926 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3927 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3928 layout_type (vtbl_ptr_type_node
);
3929 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3931 push_namespace (get_identifier ("__cxxabiv1"));
3932 abi_node
= current_namespace
;
3935 global_type_node
= make_node (LANG_TYPE
);
3936 record_unknown_type (global_type_node
, "global type");
3939 current_lang_name
= lang_name_cplusplus
;
3942 tree newattrs
, extvisattr
;
3943 tree newtype
, deltype
;
3944 tree ptr_ftype_sizetype
;
3948 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3949 if (cxx_dialect
== cxx98
)
3952 tree bad_alloc_type_node
;
3953 tree bad_alloc_decl
;
3955 push_namespace (std_identifier
);
3956 bad_alloc_id
= get_identifier ("bad_alloc");
3957 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3958 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3960 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3961 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3965 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3968 new_eh_spec
= noexcept_false_spec
;
3970 /* Ensure attribs.c is initialized. */
3972 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3974 newattrs
= tree_cons (get_identifier ("alloc_size"),
3975 build_tree_list (NULL_TREE
, integer_one_node
),
3977 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3978 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3979 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3980 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3981 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3982 DECL_IS_MALLOC (opnew
) = 1;
3983 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3984 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3985 DECL_IS_MALLOC (opnew
) = 1;
3986 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3987 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3988 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3989 if (flag_sized_deallocation
)
3991 /* Also push the sized deallocation variants:
3992 void operator delete(void*, std::size_t) throw();
3993 void operator delete[](void*, std::size_t) throw(); */
3994 tree void_ftype_ptr_size
3995 = build_function_type_list (void_type_node
, ptr_type_node
,
3996 size_type_node
, NULL_TREE
);
3997 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
3999 deltype
= build_exception_variant (deltype
, empty_except_spec
);
4000 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4001 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
4004 nullptr_type_node
= make_node (NULLPTR_TYPE
);
4005 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
4006 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
4007 TYPE_UNSIGNED (nullptr_type_node
) = 1;
4008 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
4009 if (abi_version_at_least (9))
4010 TYPE_ALIGN (nullptr_type_node
) = GET_MODE_ALIGNMENT (ptr_mode
);
4011 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
4012 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
4013 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
4017 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
4018 ECF_NORETURN
| ECF_NOTHROW
);
4020 /* Perform other language dependent initializations. */
4021 init_class_processing ();
4022 init_rtti_processing ();
4023 init_template_processing ();
4025 if (flag_exceptions
)
4026 init_exception_processing ();
4028 if (! supports_one_only ())
4031 make_fname_decl
= cp_make_fname_decl
;
4032 start_fname_decls ();
4034 /* Show we use EH for cleanups. */
4035 if (flag_exceptions
)
4036 using_eh_for_cleanups ();
4039 /* Generate an initializer for a function naming variable from
4040 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4041 filled in with the type of the init. */
4044 cp_fname_init (const char* name
, tree
*type_p
)
4046 tree domain
= NULL_TREE
;
4048 tree init
= NULL_TREE
;
4053 length
= strlen (name
);
4054 domain
= build_index_type (size_int (length
));
4055 init
= build_string (length
+ 1, name
);
4058 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4059 type
= build_cplus_array_type (type
, domain
);
4064 TREE_TYPE (init
) = type
;
4066 init
= error_mark_node
;
4071 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4072 the decl, LOC is the location to give the decl, NAME is the
4073 initialization string and TYPE_DEP indicates whether NAME depended
4074 on the type of the function. We make use of that to detect
4075 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4076 at the point of first use, so we mustn't push the decl now. */
4079 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4081 const char *const name
= (type_dep
&& processing_template_decl
4082 ? NULL
: fname_as_string (type_dep
));
4084 tree init
= cp_fname_init (name
, &type
);
4085 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4088 free (CONST_CAST (char *, name
));
4090 /* As we're using pushdecl_with_scope, we must set the context. */
4091 DECL_CONTEXT (decl
) = current_function_decl
;
4093 TREE_STATIC (decl
) = 1;
4094 TREE_READONLY (decl
) = 1;
4095 DECL_ARTIFICIAL (decl
) = 1;
4097 TREE_USED (decl
) = 1;
4099 if (current_function_decl
)
4101 cp_binding_level
*b
= current_binding_level
;
4102 if (b
->kind
== sk_function_parms
)
4103 return error_mark_node
;
4104 while (b
->level_chain
->kind
!= sk_function_parms
)
4106 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4107 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4108 LOOKUP_ONLYCONVERTING
);
4112 DECL_THIS_STATIC (decl
) = true;
4113 pushdecl_top_level_and_finish (decl
, init
);
4120 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4122 tree id
= DECL_NAME (decl
);
4123 const char *name
= IDENTIFIER_POINTER (id
);
4125 retrofit_lang_decl (decl
);
4127 DECL_ARTIFICIAL (decl
) = 1;
4128 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4129 SET_DECL_LANGUAGE (decl
, lang_c
);
4130 /* Runtime library routines are, by definition, available in an
4131 external shared object. */
4132 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4133 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4135 DECL_CONTEXT (decl
) = context
;
4138 pushdecl_top_level (decl
);
4142 /* A function in the user's namespace should have an explicit
4143 declaration before it is used. Mark the built-in function as
4144 anticipated but not actually declared. */
4145 if (name
[0] != '_' || name
[1] != '_')
4146 DECL_ANTICIPATED (decl
) = 1;
4147 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4149 size_t len
= strlen (name
);
4151 /* Treat __*_chk fortification functions as anticipated as well,
4152 unless they are __builtin_*. */
4153 if (len
> strlen ("___chk")
4154 && memcmp (name
+ len
- strlen ("_chk"),
4155 "_chk", strlen ("_chk") + 1) == 0)
4156 DECL_ANTICIPATED (decl
) = 1;
4163 cxx_builtin_function (tree decl
)
4165 tree id
= DECL_NAME (decl
);
4166 const char *name
= IDENTIFIER_POINTER (id
);
4167 /* All builtins that don't begin with an '_' should additionally
4168 go in the 'std' namespace. */
4171 tree decl2
= copy_node(decl
);
4172 push_namespace (std_identifier
);
4173 builtin_function_1 (decl2
, std_node
, false);
4177 return builtin_function_1 (decl
, NULL_TREE
, false);
4180 /* Like cxx_builtin_function, but guarantee the function is added to the global
4181 scope. This is to allow function specific options to add new machine
4182 dependent builtins when the target ISA changes via attribute((target(...)))
4183 which saves space on program startup if the program does not use non-generic
4187 cxx_builtin_function_ext_scope (tree decl
)
4190 tree id
= DECL_NAME (decl
);
4191 const char *name
= IDENTIFIER_POINTER (id
);
4192 /* All builtins that don't begin with an '_' should additionally
4193 go in the 'std' namespace. */
4196 tree decl2
= copy_node(decl
);
4197 push_namespace (std_identifier
);
4198 builtin_function_1 (decl2
, std_node
, true);
4202 return builtin_function_1 (decl
, NULL_TREE
, true);
4205 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4206 function. Not called directly. */
4209 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4212 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4213 DECL_EXTERNAL (fn
) = 1;
4214 TREE_PUBLIC (fn
) = 1;
4215 DECL_ARTIFICIAL (fn
) = 1;
4216 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4217 SET_DECL_LANGUAGE (fn
, lang_c
);
4218 /* Runtime library routines are, by definition, available in an
4219 external shared object. */
4220 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4221 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4222 set_call_expr_flags (fn
, ecf_flags
);
4226 /* Returns the _DECL for a library function with C++ linkage. */
4229 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4232 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4233 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4234 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4238 /* Like build_library_fn, but takes a C string instead of an
4242 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4244 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4247 /* Like build_cp_library_fn, but takes a C string instead of an
4251 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4253 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4257 /* Like build_library_fn, but also pushes the function so that we will
4258 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4259 may throw exceptions listed in RAISES. */
4262 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4267 type
= build_exception_variant (type
, raises
);
4269 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4270 pushdecl_top_level (fn
);
4274 /* Like build_cp_library_fn, but also pushes the function so that it
4275 will be found by normal lookup. */
4278 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4281 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4286 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4290 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4294 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4296 tree type
= build_function_type (void_type_node
, parmtypes
);
4297 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4300 /* Like push_library_fn, but also note that this function throws
4301 and does not return. Used for __throw_foo and the like. */
4304 push_throw_library_fn (tree name
, tree type
)
4306 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4310 /* When we call finish_struct for an anonymous union, we create
4311 default copy constructors and such. But, an anonymous union
4312 shouldn't have such things; this function undoes the damage to the
4313 anonymous union type T.
4315 (The reason that we create the synthesized methods is that we don't
4316 distinguish `union { int i; }' from `typedef union { int i; } U'.
4317 The first is an anonymous union; the second is just an ordinary
4321 fixup_anonymous_aggr (tree t
)
4325 /* Wipe out memory of synthesized methods. */
4326 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4327 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4328 TYPE_HAS_COPY_CTOR (t
) = 0;
4329 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4330 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4331 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4333 /* Splice the implicitly generated functions out of the TYPE_METHODS
4335 q
= &TYPE_METHODS (t
);
4338 if (DECL_ARTIFICIAL (*q
))
4339 *q
= TREE_CHAIN (*q
);
4341 q
= &DECL_CHAIN (*q
);
4344 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4345 if (TYPE_METHODS (t
))
4347 tree decl
= TYPE_MAIN_DECL (t
);
4349 if (TREE_CODE (t
) != UNION_TYPE
)
4350 error_at (DECL_SOURCE_LOCATION (decl
),
4351 "an anonymous struct cannot have function members");
4353 error_at (DECL_SOURCE_LOCATION (decl
),
4354 "an anonymous union cannot have function members");
4357 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4358 assignment operators (because they cannot have these methods themselves).
4359 For anonymous unions this is already checked because they are not allowed
4360 in any union, otherwise we have to check it. */
4361 if (TREE_CODE (t
) != UNION_TYPE
)
4365 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4366 if (TREE_CODE (field
) == FIELD_DECL
)
4368 type
= TREE_TYPE (field
);
4369 if (CLASS_TYPE_P (type
))
4371 if (TYPE_NEEDS_CONSTRUCTING (type
))
4372 error ("member %q+#D with constructor not allowed "
4373 "in anonymous aggregate", field
);
4374 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4375 error ("member %q+#D with destructor not allowed "
4376 "in anonymous aggregate", field
);
4377 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4378 error ("member %q+#D with copy assignment operator "
4379 "not allowed in anonymous aggregate", field
);
4385 /* Warn for an attribute located at LOCATION that appertains to the
4386 class type CLASS_TYPE that has not been properly placed after its
4387 class-key, in it class-specifier. */
4390 warn_misplaced_attr_for_class_type (source_location location
,
4393 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4395 if (warning_at (location
, OPT_Wattributes
,
4396 "attribute ignored in declaration "
4397 "of %q#T", class_type
))
4399 "attribute for %q#T must follow the %qs keyword",
4400 class_type
, class_key_or_enum_as_string (class_type
));
4403 /* Make sure that a declaration with no declarator is well-formed, i.e.
4404 just declares a tagged type or anonymous union.
4406 Returns the type declared; or NULL_TREE if none. */
4409 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4410 bool explicit_type_instantiation_p
)
4412 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4413 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4414 /* If a class, struct, or enum type is declared by the DECLSPECS
4415 (i.e, if a class-specifier, enum-specifier, or non-typename
4416 elaborated-type-specifier appears in the DECLSPECS),
4417 DECLARED_TYPE is set to the corresponding type. */
4418 tree declared_type
= NULL_TREE
;
4419 bool error_p
= false;
4421 if (declspecs
->multiple_types_p
)
4422 error ("multiple types in one declaration");
4423 else if (declspecs
->redefined_builtin_type
)
4425 if (!in_system_header_at (input_location
))
4426 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4427 "redeclaration of C++ built-in type %qT",
4428 declspecs
->redefined_builtin_type
);
4433 && TYPE_P (declspecs
->type
)
4434 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4435 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4436 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4437 declared_type
= declspecs
->type
;
4438 else if (declspecs
->type
== error_mark_node
)
4440 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4441 permerror (input_location
, "declaration does not declare anything");
4442 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4444 error ("%<auto%> can only be specified for variables "
4445 "or function declarations");
4446 return error_mark_node
;
4448 /* Check for an anonymous union. */
4449 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4450 && TYPE_ANONYMOUS_P (declared_type
))
4452 /* 7/3 In a simple-declaration, the optional init-declarator-list
4453 can be omitted only when declaring a class (clause 9) or
4454 enumeration (7.2), that is, when the decl-specifier-seq contains
4455 either a class-specifier, an elaborated-type-specifier with
4456 a class-key (9.1), or an enum-specifier. In these cases and
4457 whenever a class-specifier or enum-specifier is present in the
4458 decl-specifier-seq, the identifiers in these specifiers are among
4459 the names being declared by the declaration (as class-name,
4460 enum-names, or enumerators, depending on the syntax). In such
4461 cases, and except for the declaration of an unnamed bit-field (9.6),
4462 the decl-specifier-seq shall introduce one or more names into the
4463 program, or shall redeclare a name introduced by a previous
4464 declaration. [Example:
4465 enum { }; // ill-formed
4466 typedef class { }; // ill-formed
4470 error ("missing type-name in typedef-declaration");
4473 /* Anonymous unions are objects, so they can have specifiers. */;
4474 SET_ANON_AGGR_TYPE_P (declared_type
);
4476 if (TREE_CODE (declared_type
) != UNION_TYPE
4477 && !in_system_header_at (input_location
))
4478 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4483 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
4484 error_at (declspecs
->locations
[ds_inline
],
4485 "%<inline%> can only be specified for functions");
4486 else if (decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4487 error_at (declspecs
->locations
[ds_virtual
],
4488 "%<virtual%> can only be specified for functions");
4490 && (!current_class_type
4491 || current_scope () != current_class_type
))
4492 error_at (declspecs
->locations
[ds_friend
],
4493 "%<friend%> can only be specified inside a class");
4494 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4495 error_at (declspecs
->locations
[ds_explicit
],
4496 "%<explicit%> can only be specified for constructors");
4497 else if (declspecs
->storage_class
)
4498 error_at (declspecs
->locations
[ds_storage_class
],
4499 "a storage class can only be specified for objects "
4501 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
4502 error_at (declspecs
->locations
[ds_const
],
4503 "%<const%> can only be specified for objects and "
4505 else if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
4506 error_at (declspecs
->locations
[ds_volatile
],
4507 "%<volatile%> can only be specified for objects and "
4509 else if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
4510 error_at (declspecs
->locations
[ds_restrict
],
4511 "%<__restrict%> can only be specified for objects and "
4513 else if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4514 error_at (declspecs
->locations
[ds_thread
],
4515 "%<__thread%> can only be specified for objects "
4517 else if (saw_typedef
)
4518 warning_at (declspecs
->locations
[ds_typedef
], 0,
4519 "%<typedef%> was ignored in this declaration");
4520 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4521 error_at (declspecs
->locations
[ds_constexpr
],
4522 "%<constexpr%> cannot be used for type declarations");
4525 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4528 if (!CLASS_TYPE_P (declared_type
)
4529 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4530 /* For a non-template class, use the name location. */
4531 loc
= location_of (declared_type
);
4533 /* For a template class (an explicit instantiation), use the
4534 current location. */
4535 loc
= input_location
;
4537 if (explicit_type_instantiation_p
)
4538 /* [dcl.attr.grammar]/4:
4540 No attribute-specifier-seq shall appertain to an explicit
4543 if (warning_at (loc
, OPT_Wattributes
,
4544 "attribute ignored in explicit instantiation %q#T",
4547 "no attribute can be applied to "
4548 "an explicit instantiation");
4551 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4554 return declared_type
;
4557 /* Called when a declaration is seen that contains no names to declare.
4558 If its type is a reference to a structure, union or enum inherited
4559 from a containing scope, shadow that tag name for the current scope
4560 with a forward reference.
4561 If its type defines a new named structure or union
4562 or defines an enum, it is valid but we need not do anything here.
4563 Otherwise, it is an error.
4565 C++: may have to grok the declspecs to learn about static,
4566 complain for anonymous unions.
4568 Returns the TYPE declared -- or NULL_TREE if none. */
4571 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4573 tree t
= check_tag_decl (declspecs
,
4574 /*explicit_type_instantiation_p=*/false);
4579 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4582 /* This is where the variables in an anonymous union are
4583 declared. An anonymous union declaration looks like:
4585 because there is no declarator after the union, the parser
4586 sends that declaration here. */
4587 if (ANON_AGGR_TYPE_P (t
))
4589 fixup_anonymous_aggr (t
);
4591 if (TYPE_FIELDS (t
))
4593 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4594 declspecs
, NORMAL
, 0, NULL
);
4595 finish_anon_union (decl
);
4602 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4605 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4606 const cp_declarator
*declarator
,
4607 bool is_template_arg
)
4611 enum decl_context context
4612 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4613 attrs
= type_specifiers
->attributes
;
4614 type_specifiers
->attributes
= NULL_TREE
;
4615 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4616 if (attrs
&& type
!= error_mark_node
)
4618 if (CLASS_TYPE_P (type
))
4619 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4620 "outside of definition", type
);
4621 else if (MAYBE_CLASS_TYPE_P (type
))
4622 /* A template type parameter or other dependent type. */
4623 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4624 "type %qT without an associated declaration", type
);
4626 cplus_decl_attributes (&type
, attrs
, 0);
4631 /* Process a DECLARATOR for a function-scope variable declaration,
4632 namespace-scope variable declaration, or function declaration.
4633 (Function definitions go through start_function; class member
4634 declarations appearing in the body of the class go through
4635 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4636 If an error occurs, the error_mark_node is returned instead.
4638 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4639 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4640 for an explicitly defaulted function, or SD_DELETED for an explicitly
4641 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4642 implicitly initialized via a default constructor. ATTRIBUTES and
4643 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4645 The scope represented by the context of the returned DECL is pushed
4646 (if it is not the global namespace) and is assigned to
4647 *PUSHED_SCOPE_P. The caller is then responsible for calling
4648 pop_scope on *PUSHED_SCOPE_P if it is set. */
4651 start_decl (const cp_declarator
*declarator
,
4652 cp_decl_specifier_seq
*declspecs
,
4655 tree prefix_attributes
,
4656 tree
*pushed_scope_p
)
4664 *pushed_scope_p
= NULL_TREE
;
4666 /* An object declared as __attribute__((deprecated)) suppresses
4667 warnings of uses of other deprecated items. */
4668 if (lookup_attribute ("deprecated", attributes
))
4669 deprecated_state
= DEPRECATED_SUPPRESS
;
4671 attributes
= chainon (attributes
, prefix_attributes
);
4673 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4676 deprecated_state
= DEPRECATED_NORMAL
;
4678 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4679 || decl
== error_mark_node
)
4680 return error_mark_node
;
4682 context
= CP_DECL_CONTEXT (decl
);
4683 if (context
!= global_namespace
)
4684 *pushed_scope_p
= push_scope (context
);
4686 /* Is it valid for this decl to have an initializer at all?
4687 If not, set INITIALIZED to zero, which will indirectly
4688 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4690 && TREE_CODE (decl
) == TYPE_DECL
)
4692 error ("typedef %qD is initialized (use decltype instead)", decl
);
4693 return error_mark_node
;
4698 if (! toplevel_bindings_p ()
4699 && DECL_EXTERNAL (decl
))
4700 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4702 DECL_EXTERNAL (decl
) = 0;
4703 if (toplevel_bindings_p ())
4704 TREE_STATIC (decl
) = 1;
4706 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4708 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4709 record_key_method_defined (decl
);
4711 /* If this is a typedef that names the class for linkage purposes
4712 (7.1.3p8), apply any attributes directly to the type. */
4713 if (TREE_CODE (decl
) == TYPE_DECL
4714 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4715 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4716 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4720 /* Set attributes here so if duplicate decl, will have proper attributes. */
4721 cplus_decl_attributes (&decl
, attributes
, flags
);
4723 /* Dllimported symbols cannot be defined. Static data members (which
4724 can be initialized in-class and dllimported) go through grokfield,
4725 not here, so we don't need to exclude those decls when checking for
4727 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4729 error ("definition of %q#D is marked %<dllimport%>", decl
);
4730 DECL_DLLIMPORT_P (decl
) = 0;
4733 /* If #pragma weak was used, mark the decl weak now. */
4734 if (!processing_template_decl
)
4735 maybe_apply_pragma_weak (decl
);
4737 if (TREE_CODE (decl
) == FUNCTION_DECL
4738 && DECL_DECLARED_INLINE_P (decl
)
4739 && DECL_UNINLINABLE (decl
)
4740 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4741 warning (0, "inline function %q+D given attribute noinline", decl
);
4743 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4745 bool this_tmpl
= (processing_template_decl
4746 > template_class_depth (context
));
4749 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4750 if (field
== NULL_TREE
4751 || !(VAR_P (field
) || variable_template_p (field
)))
4752 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4753 else if (variable_template_p (field
) && !this_tmpl
)
4755 if (DECL_LANG_SPECIFIC (decl
)
4756 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4757 /* OK, specialization was already checked. */;
4760 error_at (DECL_SOURCE_LOCATION (decl
),
4761 "non-member-template declaration of %qD", decl
);
4762 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4763 "member template declaration here");
4764 return error_mark_node
;
4769 if (variable_template_p (field
))
4770 field
= DECL_TEMPLATE_RESULT (field
);
4772 if (DECL_CONTEXT (field
) != context
)
4774 if (!same_type_p (DECL_CONTEXT (field
), context
))
4775 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4776 "to be defined as %<%T::%D%>",
4777 DECL_CONTEXT (field
), DECL_NAME (decl
),
4778 context
, DECL_NAME (decl
));
4779 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4781 /* Static data member are tricky; an in-class initialization
4782 still doesn't provide a definition, so the in-class
4783 declaration will have DECL_EXTERNAL set, but will have an
4784 initialization. Thus, duplicate_decls won't warn
4785 about this situation, and so we check here. */
4786 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4787 error ("duplicate initialization of %qD", decl
);
4788 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4790 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4791 && !DECL_DECLARED_CONSTEXPR_P (field
))
4792 error ("%qD declared %<constexpr%> outside its class", field
);
4797 tree field
= check_classfn (context
, decl
,
4799 ? current_template_parms
4801 if (field
&& field
!= error_mark_node
4802 && duplicate_decls (decl
, field
,
4803 /*newdecl_is_friend=*/false))
4807 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4808 DECL_IN_AGGR_P (decl
) = 0;
4809 /* Do not mark DECL as an explicit specialization if it was not
4810 already marked as an instantiation; a declaration should
4811 never be marked as a specialization unless we know what
4812 template is being specialized. */
4813 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4815 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4816 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4817 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4818 && DECL_DECLARED_INLINE_P (decl
));
4820 DECL_COMDAT (decl
) = false;
4822 /* [temp.expl.spec] An explicit specialization of a static data
4823 member of a template is a definition if the declaration
4824 includes an initializer; otherwise, it is a declaration.
4826 We check for processing_specialization so this only applies
4827 to the new specialization syntax. */
4828 if (!initialized
&& processing_specialization
)
4829 DECL_EXTERNAL (decl
) = 1;
4832 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4833 /* Aliases are definitions. */
4835 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4839 was_public
= TREE_PUBLIC (decl
);
4841 /* Enter this declaration into the symbol table. Don't push the plain
4842 VAR_DECL for a variable template. */
4843 if (!template_parm_scope_p ()
4845 decl
= maybe_push_decl (decl
);
4847 if (processing_template_decl
)
4848 decl
= push_template_decl (decl
);
4849 if (decl
== error_mark_node
)
4850 return error_mark_node
;
4853 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4854 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4856 /* This is a const variable with implicit 'static'. Set
4857 DECL_THIS_STATIC so we can tell it from variables that are
4858 !TREE_PUBLIC because of the anonymous namespace. */
4859 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4860 DECL_THIS_STATIC (decl
) = 1;
4863 if (current_function_decl
&& VAR_P (decl
)
4864 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4867 if (CP_DECL_THREAD_LOCAL_P (decl
))
4868 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4870 else if (TREE_STATIC (decl
))
4871 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4875 cp_function_chain
->invalid_constexpr
= true;
4878 if (!processing_template_decl
&& VAR_P (decl
))
4879 start_decl_1 (decl
, initialized
);
4884 /* Process the declaration of a variable DECL. INITIALIZED is true
4885 iff DECL is explicitly initialized. (INITIALIZED is false if the
4886 variable is initialized via an implicitly-called constructor.)
4887 This function must be called for ordinary variables (including, for
4888 example, implicit instantiations of templates), but must not be
4889 called for template declarations. */
4892 start_decl_1 (tree decl
, bool initialized
)
4896 bool aggregate_definition_p
;
4898 gcc_assert (!processing_template_decl
);
4900 if (error_operand_p (decl
))
4903 gcc_assert (VAR_P (decl
));
4905 type
= TREE_TYPE (decl
);
4906 complete_p
= COMPLETE_TYPE_P (type
);
4907 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4909 /* If an explicit initializer is present, or if this is a definition
4910 of an aggregate, then we need a complete type at this point.
4911 (Scalars are always complete types, so there is nothing to
4912 check.) This code just sets COMPLETE_P; errors (if necessary)
4913 are issued below. */
4914 if ((initialized
|| aggregate_definition_p
)
4916 && COMPLETE_TYPE_P (complete_type (type
)))
4919 /* We will not yet have set TREE_READONLY on DECL if the type
4920 was "const", but incomplete, before this point. But, now, we
4921 have a complete type, so we can try again. */
4922 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4926 /* Is it valid for this decl to have an initializer at all? */
4928 /* Don't allow initializations for incomplete types except for
4929 arrays which might be completed by the initialization. */
4931 ; /* A complete type is ok. */
4932 else if (type_uses_auto (type
))
4933 ; /* An auto type is ok. */
4934 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4936 error ("variable %q#D has initializer but incomplete type", decl
);
4937 type
= TREE_TYPE (decl
) = error_mark_node
;
4939 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4941 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4942 error ("elements of array %q#D have incomplete type", decl
);
4943 /* else we already gave an error in start_decl. */
4946 else if (aggregate_definition_p
&& !complete_p
)
4948 if (type_uses_auto (type
))
4949 error ("declaration of %q#D has no initializer", decl
);
4951 error ("aggregate %q#D has incomplete type and cannot be defined",
4953 /* Change the type so that assemble_variable will give
4954 DECL an rtl we can live with: (mem (const_int 0)). */
4955 type
= TREE_TYPE (decl
) = error_mark_node
;
4958 /* Create a new scope to hold this declaration if necessary.
4959 Whether or not a new scope is necessary cannot be determined
4960 until after the type has been completed; if the type is a
4961 specialization of a class template it is not until after
4962 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4963 will be set correctly. */
4964 maybe_push_cleanup_level (type
);
4967 /* Handle initialization of references. DECL, TYPE, and INIT have the
4968 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4969 but will be set to a new CLEANUP_STMT if a temporary is created
4970 that must be destroyed subsequently.
4972 Returns an initializer expression to use to initialize DECL, or
4973 NULL if the initialization can be performed statically.
4975 Quotes on semantics can be found in ARM 8.4.3. */
4978 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4980 if (init
== NULL_TREE
)
4982 if ((DECL_LANG_SPECIFIC (decl
) == 0
4983 || DECL_IN_AGGR_P (decl
) == 0)
4984 && ! DECL_THIS_EXTERN (decl
))
4985 error ("%qD declared as reference but not initialized", decl
);
4989 if (TREE_CODE (init
) == TREE_LIST
)
4990 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4991 tf_warning_or_error
);
4993 tree ttype
= TREE_TYPE (type
);
4994 if (TREE_CODE (ttype
) != ARRAY_TYPE
4995 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4996 /* Note: default conversion is only called in very special cases. */
4997 init
= decay_conversion (init
, tf_warning_or_error
);
4999 /* check_initializer handles this for non-reference variables, but for
5000 references we need to do it here or the initializer will get the
5001 incomplete array type and confuse later calls to
5002 cp_complete_array_type. */
5003 if (TREE_CODE (ttype
) == ARRAY_TYPE
5004 && TYPE_DOMAIN (ttype
) == NULL_TREE
5005 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
5006 || TREE_CODE (init
) == STRING_CST
))
5008 cp_complete_array_type (&ttype
, init
, false);
5009 if (ttype
!= TREE_TYPE (type
))
5010 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
5013 /* Convert INIT to the reference type TYPE. This may involve the
5014 creation of a temporary, whose lifetime must be the same as that
5015 of the reference. If so, a DECL_EXPR for the temporary will be
5016 added just after the DECL_EXPR for DECL. That's why we don't set
5017 DECL_INITIAL for local references (instead assigning to them
5018 explicitly); we need to allow the temporary to be initialized
5020 return initialize_reference (type
, init
, flags
,
5021 tf_warning_or_error
);
5024 /* Designated initializers in arrays are not supported in GNU C++.
5025 The parser cannot detect this error since it does not know whether
5026 a given brace-enclosed initializer is for a class type or for an
5027 array. This function checks that CE does not use a designated
5028 initializer. If it does, an error is issued. Returns true if CE
5029 is valid, i.e., does not have a designated initializer. */
5032 check_array_designated_initializer (constructor_elt
*ce
,
5033 unsigned HOST_WIDE_INT index
)
5035 /* Designated initializers for array elements are not supported. */
5038 /* The parser only allows identifiers as designated
5040 if (ce
->index
== error_mark_node
)
5042 error ("name used in a GNU-style designated "
5043 "initializer for an array");
5046 else if (identifier_p (ce
->index
))
5048 error ("name %qD used in a GNU-style designated "
5049 "initializer for an array", ce
->index
);
5053 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5056 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5057 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5060 /* A C99 designator is OK if it matches the current index. */
5061 if (wi::eq_p (ce_index
, index
))
5064 sorry ("non-trivial designated initializers not supported");
5067 error ("C99 designator %qE is not an integral constant-expression",
5076 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5077 array until we finish parsing the initializer. If that's the
5078 situation we're in, update DECL accordingly. */
5081 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5083 tree type
= TREE_TYPE (decl
);
5085 if (TREE_CODE (type
) == ARRAY_TYPE
5086 && TYPE_DOMAIN (type
) == NULL_TREE
5087 && TREE_CODE (decl
) != TYPE_DECL
)
5089 /* do_default is really a C-ism to deal with tentative definitions.
5090 But let's leave it here to ease the eventual merge. */
5091 int do_default
= !DECL_EXTERNAL (decl
);
5092 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5095 /* Check that there are no designated initializers in INIT, as
5096 those are not supported in GNU C++, and as the middle-end
5097 will crash if presented with a non-numeric designated
5099 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5101 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5102 constructor_elt
*ce
;
5104 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5105 if (!check_array_designated_initializer (ce
, i
))
5111 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5115 error ("initializer fails to determine size of %qD", decl
);
5117 else if (failure
== 2)
5121 error ("array size missing in %qD", decl
);
5123 /* If a `static' var's size isn't known, make it extern as
5124 well as static, so it does not get allocated. If it's not
5125 `static', then don't mark it extern; finish_incomplete_decl
5126 will give it a default size and it will get allocated. */
5127 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5128 DECL_EXTERNAL (decl
) = 1;
5130 else if (failure
== 3)
5132 error ("zero-size array %qD", decl
);
5136 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5138 relayout_decl (decl
);
5142 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5143 any appropriate error messages regarding the layout. */
5146 layout_var_decl (tree decl
)
5150 type
= TREE_TYPE (decl
);
5151 if (type
== error_mark_node
)
5154 /* If we haven't already laid out this declaration, do so now.
5155 Note that we must not call complete type for an external object
5156 because it's type might involve templates that we are not
5157 supposed to instantiate yet. (And it's perfectly valid to say
5158 `extern X x' for some incomplete type `X'.) */
5159 if (!DECL_EXTERNAL (decl
))
5160 complete_type (type
);
5161 if (!DECL_SIZE (decl
)
5162 && TREE_TYPE (decl
) != error_mark_node
5163 && (COMPLETE_TYPE_P (type
)
5164 || (TREE_CODE (type
) == ARRAY_TYPE
5165 && !TYPE_DOMAIN (type
)
5166 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5167 layout_decl (decl
, 0);
5169 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5171 /* An automatic variable with an incomplete type: that is an error.
5172 Don't talk about array types here, since we took care of that
5173 message in grokdeclarator. */
5174 error ("storage size of %qD isn%'t known", decl
);
5175 TREE_TYPE (decl
) = error_mark_node
;
5178 /* Keep this code around in case we later want to control debug info
5179 based on whether a type is "used". (jason 1999-11-11) */
5181 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5182 /* Let debugger know it should output info for this type. */
5183 note_debug_info_needed (ttype
);
5185 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5186 note_debug_info_needed (DECL_CONTEXT (decl
));
5189 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5190 && DECL_SIZE (decl
) != NULL_TREE
5191 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5193 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5194 constant_expression_warning (DECL_SIZE (decl
));
5197 error ("storage size of %qD isn%'t constant", decl
);
5198 TREE_TYPE (decl
) = error_mark_node
;
5203 /* If a local static variable is declared in an inline function, or if
5204 we have a weak definition, we must endeavor to create only one
5205 instance of the variable at link-time. */
5208 maybe_commonize_var (tree decl
)
5210 /* Static data in a function with comdat linkage also has comdat
5212 if (TREE_STATIC (decl
)
5213 /* Don't mess with __FUNCTION__. */
5214 && ! DECL_ARTIFICIAL (decl
)
5215 && DECL_FUNCTION_SCOPE_P (decl
)
5216 && vague_linkage_p (DECL_CONTEXT (decl
)))
5220 /* With weak symbols, we simply make the variable COMDAT;
5221 that will cause copies in multiple translations units to
5223 comdat_linkage (decl
);
5227 if (DECL_INITIAL (decl
) == NULL_TREE
5228 || DECL_INITIAL (decl
) == error_mark_node
)
5230 /* Without weak symbols, we can use COMMON to merge
5231 uninitialized variables. */
5232 TREE_PUBLIC (decl
) = 1;
5233 DECL_COMMON (decl
) = 1;
5237 /* While for initialized variables, we must use internal
5238 linkage -- which means that multiple copies will not
5240 TREE_PUBLIC (decl
) = 0;
5241 DECL_COMMON (decl
) = 0;
5242 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5243 "sorry: semantics of inline function static "
5244 "data %q#D are wrong (you%'ll wind up "
5245 "with multiple copies)", decl
))
5246 inform (DECL_SOURCE_LOCATION (decl
),
5247 "you can work around this by removing the initializer");
5253 /* Issue an error message if DECL is an uninitialized const variable. */
5256 check_for_uninitialized_const_var (tree decl
)
5258 tree type
= strip_array_types (TREE_TYPE (decl
));
5260 /* ``Unless explicitly declared extern, a const object does not have
5261 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5264 && TREE_CODE (type
) != REFERENCE_TYPE
5265 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5266 && !DECL_INITIAL (decl
))
5268 tree field
= default_init_uninitialized_part (type
);
5272 if (CP_TYPE_CONST_P (type
))
5273 permerror (DECL_SOURCE_LOCATION (decl
),
5274 "uninitialized const %qD", decl
);
5277 error_at (DECL_SOURCE_LOCATION (decl
),
5278 "uninitialized variable %qD in %<constexpr%> function",
5280 cp_function_chain
->invalid_constexpr
= true;
5283 if (CLASS_TYPE_P (type
))
5285 tree defaulted_ctor
;
5287 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5288 "%q#T has no user-provided default constructor", type
);
5289 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5291 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5292 "constructor is not user-provided because it is "
5293 "explicitly defaulted in the class body");
5294 inform (0, "and the implicitly-defined constructor does not "
5295 "initialize %q+#D", field
);
5300 /* Structure holding the current initializer being processed by reshape_init.
5301 CUR is a pointer to the current element being processed, END is a pointer
5302 after the last element present in the initializer. */
5303 typedef struct reshape_iterator_t
5305 constructor_elt
*cur
;
5306 constructor_elt
*end
;
5309 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5311 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5312 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5313 initialized. If there are no more such fields, the return value
5317 next_initializable_field (tree field
)
5320 && (TREE_CODE (field
) != FIELD_DECL
5321 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5322 || DECL_ARTIFICIAL (field
)))
5323 field
= DECL_CHAIN (field
);
5328 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5329 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5330 INTEGER_CST representing the size of the array minus one (the maximum index),
5331 or NULL_TREE if the array was declared without specifying the size. D is
5332 the iterator within the constructor. */
5335 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5336 tsubst_flags_t complain
)
5339 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5340 unsigned HOST_WIDE_INT max_index_cst
= 0;
5341 unsigned HOST_WIDE_INT index
;
5343 /* The initializer for an array is always a CONSTRUCTOR. */
5344 new_init
= build_constructor (init_list_type_node
, NULL
);
5348 /* Minus 1 is used for zero sized arrays. */
5349 if (integer_all_onesp (max_index
))
5352 if (tree_fits_uhwi_p (max_index
))
5353 max_index_cst
= tree_to_uhwi (max_index
);
5354 /* sizetype is sign extended, not zero extended. */
5356 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5359 /* Loop until there are no more initializers. */
5361 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5365 constructor_elt
*old_cur
= d
->cur
;
5367 check_array_designated_initializer (d
->cur
, index
);
5368 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5370 if (elt_init
== error_mark_node
)
5371 return error_mark_node
;
5372 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5373 size_int (index
), elt_init
);
5374 if (!TREE_CONSTANT (elt_init
))
5375 TREE_CONSTANT (new_init
) = false;
5377 /* This can happen with an invalid initializer (c++/54501). */
5378 if (d
->cur
== old_cur
&& !sized_array_p
)
5385 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5386 Parameters are the same of reshape_init_r. */
5389 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5391 tree max_index
= NULL_TREE
;
5393 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5395 if (TYPE_DOMAIN (type
))
5396 max_index
= array_type_nelts (type
);
5398 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5401 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5402 Parameters are the same of reshape_init_r. */
5405 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5407 tree max_index
= NULL_TREE
;
5409 gcc_assert (VECTOR_TYPE_P (type
));
5411 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5413 tree value
= d
->cur
->value
;
5414 if (!same_type_p (TREE_TYPE (value
), type
))
5416 if (complain
& tf_error
)
5417 error ("invalid type %qT as initializer for a vector of type %qT",
5418 TREE_TYPE (d
->cur
->value
), type
);
5419 value
= error_mark_node
;
5425 /* For a vector, we initialize it as an array of the appropriate size. */
5426 if (VECTOR_TYPE_P (type
))
5427 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5429 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5432 /* Subroutine of reshape_init_r, processes the initializers for classes
5433 or union. Parameters are the same of reshape_init_r. */
5436 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5437 tsubst_flags_t complain
)
5442 gcc_assert (CLASS_TYPE_P (type
));
5444 /* The initializer for a class is always a CONSTRUCTOR. */
5445 new_init
= build_constructor (init_list_type_node
, NULL
);
5446 field
= next_initializable_field (TYPE_FIELDS (type
));
5452 An initializer for an aggregate member that is an
5453 empty class shall have the form of an empty
5454 initializer-list {}. */
5455 if (!first_initializer_p
)
5457 if (complain
& tf_error
)
5458 error ("initializer for %qT must be brace-enclosed", type
);
5459 return error_mark_node
;
5464 /* Loop through the initializable fields, gathering initializers. */
5465 while (d
->cur
!= d
->end
)
5468 constructor_elt
*old_cur
= d
->cur
;
5470 /* Handle designated initializers, as an extension. */
5473 if (d
->cur
->index
== error_mark_node
)
5474 return error_mark_node
;
5476 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5477 /* We already reshaped this. */
5478 gcc_assert (d
->cur
->index
== field
);
5479 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5480 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5483 if (complain
& tf_error
)
5484 error ("%<[%E] =%> used in a GNU-style designated initializer"
5485 " for class %qT", d
->cur
->index
, type
);
5486 return error_mark_node
;
5489 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5491 if (complain
& tf_error
)
5492 error ("%qT has no non-static data member named %qD", type
,
5494 return error_mark_node
;
5498 /* If we processed all the member of the class, we are done. */
5502 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5503 /*first_initializer_p=*/false, complain
);
5504 if (field_init
== error_mark_node
)
5505 return error_mark_node
;
5507 if (d
->cur
== old_cur
&& d
->cur
->index
)
5509 /* This can happen with an invalid initializer for a flexible
5510 array member (c++/54441). */
5511 if (complain
& tf_error
)
5512 error ("invalid initializer for %q#D", field
);
5513 return error_mark_node
;
5516 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5520 When a union is initialized with a brace-enclosed
5521 initializer, the braces shall only contain an
5522 initializer for the first member of the union. */
5523 if (TREE_CODE (type
) == UNION_TYPE
)
5526 field
= next_initializable_field (DECL_CHAIN (field
));
5532 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5533 designators are not valid; either complain or return true to indicate
5534 that reshape_init_r should return error_mark_node. */
5537 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5541 if (complain
& tf_error
)
5542 error ("C99 designator %qE outside aggregate initializer",
5550 /* Subroutine of reshape_init, which processes a single initializer (part of
5551 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5552 iterator within the CONSTRUCTOR which points to the initializer to process.
5553 FIRST_INITIALIZER_P is true if this is the first initializer of the
5554 outermost CONSTRUCTOR node. */
5557 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5558 tsubst_flags_t complain
)
5560 tree init
= d
->cur
->value
;
5562 if (error_operand_p (init
))
5563 return error_mark_node
;
5565 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5566 && has_designator_problem (d
, complain
))
5567 return error_mark_node
;
5569 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5571 /* A complex type can be initialized from one or two initializers,
5572 but braces are not elided. */
5574 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5576 if (CONSTRUCTOR_NELTS (init
) > 2)
5578 if (complain
& tf_error
)
5579 error ("too many initializers for %qT", type
);
5581 return error_mark_node
;
5584 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5586 vec
<constructor_elt
, va_gc
> *v
= 0;
5587 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5588 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5589 if (has_designator_problem (d
, complain
))
5590 return error_mark_node
;
5592 init
= build_constructor (init_list_type_node
, v
);
5597 /* A non-aggregate type is always initialized with a single
5599 if (!CP_AGGREGATE_TYPE_P (type
))
5601 /* It is invalid to initialize a non-aggregate type with a
5602 brace-enclosed initializer before C++0x.
5603 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5604 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5605 a CONSTRUCTOR (with a record type). */
5606 if (TREE_CODE (init
) == CONSTRUCTOR
5607 /* Don't complain about a capture-init. */
5608 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5609 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5611 if (SCALAR_TYPE_P (type
))
5613 if (cxx_dialect
< cxx11
5614 /* Isn't value-initialization. */
5615 || CONSTRUCTOR_NELTS (init
) > 0)
5617 if (complain
& tf_error
)
5618 error ("braces around scalar initializer for type %qT",
5620 init
= error_mark_node
;
5624 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5631 /* "If T is a class type and the initializer list has a single element of
5632 type cv U, where U is T or a class derived from T, the object is
5633 initialized from that element." Even if T is an aggregate. */
5634 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5635 && first_initializer_p
5636 && d
->end
- d
->cur
== 1
5637 && reference_related_p (type
, TREE_TYPE (init
)))
5645 All implicit type conversions (clause _conv_) are considered when
5646 initializing the aggregate member with an initializer from an
5647 initializer-list. If the initializer can initialize a member,
5648 the member is initialized. Otherwise, if the member is itself a
5649 non-empty subaggregate, brace elision is assumed and the
5650 initializer is considered for the initialization of the first
5651 member of the subaggregate. */
5652 if (TREE_CODE (init
) != CONSTRUCTOR
5653 /* But don't try this for the first initializer, since that would be
5654 looking through the outermost braces; A a2 = { a1 }; is not a
5655 valid aggregate initialization. */
5656 && !first_initializer_p
5657 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5658 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5665 /* [dcl.init.string]
5667 A char array (whether plain char, signed char, or unsigned char)
5668 can be initialized by a string-literal (optionally enclosed in
5669 braces); a wchar_t array can be initialized by a wide
5670 string-literal (optionally enclosed in braces). */
5671 if (TREE_CODE (type
) == ARRAY_TYPE
5672 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5674 tree str_init
= init
;
5676 /* Strip one level of braces if and only if they enclose a single
5677 element (as allowed by [dcl.init.string]). */
5678 if (!first_initializer_p
5679 && TREE_CODE (str_init
) == CONSTRUCTOR
5680 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5682 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5685 /* If it's a string literal, then it's the initializer for the array
5686 as a whole. Otherwise, continue with normal initialization for
5687 array types (one value per array element). */
5688 if (TREE_CODE (str_init
) == STRING_CST
)
5690 if (has_designator_problem (d
, complain
))
5691 return error_mark_node
;
5697 /* The following cases are about aggregates. If we are not within a full
5698 initializer already, and there is not a CONSTRUCTOR, it means that there
5699 is a missing set of braces (that is, we are processing the case for
5700 which reshape_init exists). */
5701 if (!first_initializer_p
)
5703 if (TREE_CODE (init
) == CONSTRUCTOR
)
5705 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5706 /* There is no need to reshape pointer-to-member function
5707 initializers, as they are always constructed correctly
5708 by the front end. */
5710 else if (COMPOUND_LITERAL_P (init
))
5711 /* For a nested compound literal, there is no need to reshape since
5712 brace elision is not allowed. Even if we decided to allow it,
5713 we should add a call to reshape_init in finish_compound_literal,
5714 before calling digest_init, so changing this code would still
5715 not be necessary. */
5716 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5720 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5721 return reshape_init (type
, init
, complain
);
5725 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5729 /* Dispatch to specialized routines. */
5730 if (CLASS_TYPE_P (type
))
5731 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5732 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5733 return reshape_init_array (type
, d
, complain
);
5734 else if (VECTOR_TYPE_P (type
))
5735 return reshape_init_vector (type
, d
, complain
);
5740 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5741 brace-enclosed aggregate initializer.
5743 INIT is the CONSTRUCTOR containing the list of initializers describing
5744 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5745 It may not presently match the shape of the TYPE; for example:
5747 struct S { int a; int b; };
5748 struct S a[] = { 1, 2, 3, 4 };
5750 Here INIT will hold a vector of four elements, rather than a
5751 vector of two elements, each itself a vector of two elements. This
5752 routine transforms INIT from the former form into the latter. The
5753 revised CONSTRUCTOR node is returned. */
5756 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5758 vec
<constructor_elt
, va_gc
> *v
;
5762 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5764 v
= CONSTRUCTOR_ELTS (init
);
5766 /* An empty constructor does not need reshaping, and it is always a valid
5768 if (vec_safe_is_empty (v
))
5771 /* Recurse on this CONSTRUCTOR. */
5773 d
.end
= d
.cur
+ v
->length ();
5775 new_init
= reshape_init_r (type
, &d
, true, complain
);
5776 if (new_init
== error_mark_node
)
5777 return error_mark_node
;
5779 /* Make sure all the element of the constructor were used. Otherwise,
5780 issue an error about exceeding initializers. */
5783 if (complain
& tf_error
)
5784 error ("too many initializers for %qT", type
);
5786 return error_mark_node
;
5792 /* Verify array initializer. Returns true if errors have been reported. */
5795 check_array_initializer (tree decl
, tree type
, tree init
)
5797 tree element_type
= TREE_TYPE (type
);
5799 /* The array type itself need not be complete, because the
5800 initializer may tell us how many elements are in the array.
5801 But, the elements of the array must be complete. */
5802 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5805 error ("elements of array %q#D have incomplete type", decl
);
5807 error ("elements of array %q#T have incomplete type", type
);
5810 /* A compound literal can't have variable size. */
5812 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5813 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5815 error ("variable-sized compound literal");
5821 /* Subroutine of check_initializer; args are passed down from that function.
5822 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5825 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5828 gcc_assert (stmts_are_full_exprs_p ());
5829 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5832 /* Verify INIT (the initializer for DECL), and record the
5833 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5834 grok_reference_init.
5836 If the return value is non-NULL, it is an expression that must be
5837 evaluated dynamically to initialize DECL. */
5840 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5842 tree type
= TREE_TYPE (decl
);
5843 tree init_code
= NULL
;
5846 /* Things that are going to be initialized need to have complete
5848 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5850 if (DECL_HAS_VALUE_EXPR_P (decl
))
5852 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5853 it doesn't have storage to be initialized. */
5854 gcc_assert (init
== NULL_TREE
);
5858 if (type
== error_mark_node
)
5859 /* We will have already complained. */
5862 if (TREE_CODE (type
) == ARRAY_TYPE
)
5864 if (check_array_initializer (decl
, type
, init
))
5867 else if (!COMPLETE_TYPE_P (type
))
5869 error ("%q#D has incomplete type", decl
);
5870 TREE_TYPE (decl
) = error_mark_node
;
5874 /* There is no way to make a variable-sized class type in GNU C++. */
5875 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5877 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5879 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5880 if (SCALAR_TYPE_P (type
))
5884 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5885 init
= build_zero_init (type
, NULL_TREE
, false);
5887 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5889 error ("scalar object %qD requires one element in initializer",
5891 TREE_TYPE (decl
) = error_mark_node
;
5897 if (TREE_CODE (decl
) == CONST_DECL
)
5899 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5901 DECL_INITIAL (decl
) = init
;
5903 gcc_assert (init
!= NULL_TREE
);
5906 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5908 else if (init
|| type_build_ctor_call (type
)
5909 || TREE_CODE (type
) == REFERENCE_TYPE
)
5911 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5913 init
= grok_reference_init (decl
, type
, init
, flags
);
5914 flags
|= LOOKUP_ALREADY_DIGESTED
;
5917 check_for_uninitialized_const_var (decl
);
5918 /* Do not reshape constructors of vectors (they don't need to be
5920 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5922 if (is_std_init_list (type
))
5924 init
= perform_implicit_conversion (type
, init
,
5925 tf_warning_or_error
);
5926 flags
|= LOOKUP_ALREADY_DIGESTED
;
5928 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5930 /* Don't reshape if the class has constructors. */
5931 if (cxx_dialect
== cxx98
)
5932 error ("in C++98 %qD must be initialized by constructor, "
5936 else if (VECTOR_TYPE_P (type
) && TYPE_VECTOR_OPAQUE (type
))
5938 error ("opaque vector types cannot be initialized");
5939 init
= error_mark_node
;
5943 init
= reshape_init (type
, init
, tf_warning_or_error
);
5944 flags
|= LOOKUP_NO_NARROWING
;
5947 else if (TREE_CODE (init
) == TREE_LIST
5948 && TREE_TYPE (init
) != unknown_type_node
5949 && !MAYBE_CLASS_TYPE_P (type
))
5951 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5953 /* We get here with code like `int a (2);' */
5954 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5955 tf_warning_or_error
);
5958 /* If DECL has an array type without a specific bound, deduce the
5959 array size from the initializer. */
5960 maybe_deduce_size_from_array_init (decl
, init
);
5961 type
= TREE_TYPE (decl
);
5962 if (type
== error_mark_node
)
5965 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5966 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5967 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5968 && CP_AGGREGATE_TYPE_P (type
)
5969 && (CLASS_TYPE_P (type
)
5970 || !TYPE_NEEDS_CONSTRUCTING (type
)
5971 || type_has_extended_temps (type
))))
5973 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5975 /* A constructor call is a non-trivial initializer even if
5976 it isn't explicitly written. */
5977 if (TREE_SIDE_EFFECTS (init_code
))
5978 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5980 /* If this is a constexpr initializer, expand_default_init will
5981 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5982 case, pull the initializer back out and pass it down into
5983 store_init_value. */
5984 while (TREE_CODE (init_code
) == EXPR_STMT
5985 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5986 init_code
= TREE_OPERAND (init_code
, 0);
5987 if (TREE_CODE (init_code
) == INIT_EXPR
)
5989 init
= TREE_OPERAND (init_code
, 1);
5990 init_code
= NULL_TREE
;
5991 /* Don't call digest_init; it's unnecessary and will complain
5992 about aggregate initialization of non-aggregate classes. */
5993 flags
|= LOOKUP_ALREADY_DIGESTED
;
5995 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5997 /* Declared constexpr, but no suitable initializer; massage
5998 init appropriately so we can pass it into store_init_value
6000 if (CLASS_TYPE_P (type
)
6001 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
6003 init
= build_functional_cast (type
, init
, tf_none
);
6004 if (TREE_CODE (init
) == TARGET_EXPR
)
6005 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
6007 init_code
= NULL_TREE
;
6013 if (init
&& TREE_CODE (init
) != TREE_VEC
)
6015 /* In aggregate initialization of a variable, each element
6016 initialization is a full-expression because there is no
6017 enclosing expression. */
6018 gcc_assert (stmts_are_full_exprs_p ());
6020 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
6022 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
6023 && DECL_INITIAL (decl
)
6024 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
6025 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
6026 warning (0, "array %qD initialized by parenthesized string literal %qE",
6027 decl
, DECL_INITIAL (decl
));
6033 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
6034 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
6035 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
6036 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
6039 check_for_uninitialized_const_var (decl
);
6042 if (init
&& init
!= error_mark_node
)
6043 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
6047 /* We might have set these in cp_finish_decl. */
6048 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
6049 TREE_CONSTANT (decl
) = false;
6052 if (init_code
&& DECL_IN_AGGR_P (decl
))
6054 static int explained
= 0;
6056 if (cxx_dialect
< cxx11
)
6057 error ("initializer invalid for static member with constructor");
6059 error ("non-constant in-class initialization invalid for static "
6060 "member %qD", decl
);
6063 inform (input_location
,
6064 "(an out of class initialization is required)");
6073 /* If DECL is not a local variable, give it RTL. */
6076 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6078 int toplev
= toplevel_bindings_p ();
6081 /* Set the DECL_ASSEMBLER_NAME for the object. */
6084 /* The `register' keyword, when used together with an
6085 asm-specification, indicates that the variable should be
6086 placed in a particular register. */
6087 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6089 set_user_assembler_name (decl
, asmspec
);
6090 DECL_HARD_REGISTER (decl
) = 1;
6094 if (TREE_CODE (decl
) == FUNCTION_DECL
6095 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6096 set_builtin_user_assembler_name (decl
, asmspec
);
6097 set_user_assembler_name (decl
, asmspec
);
6101 /* Handle non-variables up front. */
6104 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6108 /* If we see a class member here, it should be a static data
6110 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6112 gcc_assert (TREE_STATIC (decl
));
6113 /* An in-class declaration of a static data member should be
6114 external; it is only a declaration, and not a definition. */
6115 if (init
== NULL_TREE
)
6116 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6119 /* We don't create any RTL for local variables. */
6120 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6123 /* We defer emission of local statics until the corresponding
6124 DECL_EXPR is expanded. */
6125 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6127 /* Defer template instantiations. */
6128 if (DECL_LANG_SPECIFIC (decl
)
6129 && DECL_IMPLICIT_INSTANTIATION (decl
))
6132 /* If we're not deferring, go ahead and assemble the variable. */
6134 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6137 /* walk_tree helper for wrap_temporary_cleanups, below. */
6140 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6142 /* Stop at types or full-expression boundaries. */
6143 if (TYPE_P (*stmt_p
)
6144 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6150 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6152 tree guard
= (tree
)data
;
6153 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6155 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6156 /* Tell honor_protect_cleanup_actions to handle this as a separate
6158 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6160 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6166 /* We're initializing a local variable which has a cleanup GUARD. If there
6167 are any temporaries used in the initializer INIT of this variable, we
6168 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6169 variable will be cleaned up properly if one of them throws.
6171 Unfortunately, there's no way to express this properly in terms of
6172 nesting, as the regions for the temporaries overlap the region for the
6173 variable itself; if there are two temporaries, the variable needs to be
6174 the first thing destroyed if either of them throws. However, we only
6175 want to run the variable's cleanup if it actually got constructed. So
6176 we need to guard the temporary cleanups with the variable's cleanup if
6177 they are run on the normal path, but not if they are run on the
6178 exceptional path. We implement this by telling
6179 honor_protect_cleanup_actions to strip the variable cleanup from the
6180 exceptional path. */
6183 wrap_temporary_cleanups (tree init
, tree guard
)
6185 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6188 /* Generate code to initialize DECL (a local variable). */
6191 initialize_local_var (tree decl
, tree init
)
6193 tree type
= TREE_TYPE (decl
);
6197 gcc_assert (VAR_P (decl
)
6198 || TREE_CODE (decl
) == RESULT_DECL
);
6199 gcc_assert (!TREE_STATIC (decl
));
6201 if (DECL_SIZE (decl
) == NULL_TREE
)
6203 /* If we used it already as memory, it must stay in memory. */
6204 DECL_INITIAL (decl
) = NULL_TREE
;
6205 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6209 if (type
== error_mark_node
)
6212 /* Compute and store the initial value. */
6213 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6214 if (TREE_USED (type
))
6215 DECL_READ_P (decl
) = 1;
6217 /* Generate a cleanup, if necessary. */
6218 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6220 /* Perform the initialization. */
6223 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6224 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6225 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6227 /* Stick simple initializers in DECL_INITIAL so that
6228 -Wno-init-self works (c++/34772). */
6229 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6230 DECL_INITIAL (decl
) = rinit
;
6232 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6236 warning_at (DECL_SOURCE_LOCATION (decl
),
6238 "reference %qD is initialized with itself", decl
);
6243 int saved_stmts_are_full_exprs_p
;
6245 /* If we're only initializing a single object, guard the
6246 destructors of any temporaries used in its initializer with
6247 its destructor. This isn't right for arrays because each
6248 element initialization is a full-expression. */
6249 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6250 wrap_temporary_cleanups (init
, cleanup
);
6252 gcc_assert (building_stmt_list_p ());
6253 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6254 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6255 finish_expr_stmt (init
);
6256 current_stmt_tree ()->stmts_are_full_exprs_p
=
6257 saved_stmts_are_full_exprs_p
;
6261 /* Set this to 0 so we can tell whether an aggregate which was
6262 initialized was ever used. Don't do this if it has a
6263 destructor, so we don't complain about the 'resource
6264 allocation is initialization' idiom. Now set
6265 attribute((unused)) on types so decls of that type will be
6266 marked used. (see TREE_USED, above.) */
6267 if (TYPE_NEEDS_CONSTRUCTING (type
)
6269 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6270 && DECL_NAME (decl
))
6271 TREE_USED (decl
) = 0;
6272 else if (already_used
)
6273 TREE_USED (decl
) = 1;
6276 finish_decl_cleanup (decl
, cleanup
);
6279 /* DECL is a VAR_DECL for a compiler-generated variable with static
6280 storage duration (like a virtual table) whose initializer is a
6281 compile-time constant. Initialize the variable and provide it to the
6285 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6288 gcc_assert (DECL_ARTIFICIAL (decl
));
6289 init
= build_constructor (TREE_TYPE (decl
), v
);
6290 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6291 DECL_INITIAL (decl
) = init
;
6292 DECL_INITIALIZED_P (decl
) = 1;
6293 determine_visibility (decl
);
6294 layout_var_decl (decl
);
6295 maybe_commonize_var (decl
);
6296 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6299 /* INIT is the initializer for a variable, as represented by the
6300 parser. Returns true iff INIT is type-dependent. */
6303 type_dependent_init_p (tree init
)
6305 if (TREE_CODE (init
) == TREE_LIST
)
6306 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6307 return any_type_dependent_elements_p (init
);
6308 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6309 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6311 vec
<constructor_elt
, va_gc
> *elts
;
6315 elts
= CONSTRUCTOR_ELTS (init
);
6316 nelts
= vec_safe_length (elts
);
6317 for (i
= 0; i
< nelts
; ++i
)
6318 if (type_dependent_init_p ((*elts
)[i
].value
))
6322 /* It must be a simple expression, e.g., int i = 3; */
6323 return type_dependent_expression_p (init
);
6328 /* INIT is the initializer for a variable, as represented by the
6329 parser. Returns true iff INIT is value-dependent. */
6332 value_dependent_init_p (tree init
)
6334 if (TREE_CODE (init
) == TREE_LIST
)
6335 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6336 return any_value_dependent_elements_p (init
);
6337 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6338 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6340 vec
<constructor_elt
, va_gc
> *elts
;
6344 elts
= CONSTRUCTOR_ELTS (init
);
6345 nelts
= vec_safe_length (elts
);
6346 for (i
= 0; i
< nelts
; ++i
)
6347 if (value_dependent_init_p ((*elts
)[i
].value
))
6351 /* It must be a simple expression, e.g., int i = 3; */
6352 return value_dependent_expression_p (init
);
6357 /* Finish processing of a declaration;
6358 install its line number and initial value.
6359 If the length of an array type is not known before,
6360 it must be determined now, from the initial value, or it is an error.
6362 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6363 true, then INIT is an integral constant expression.
6365 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6366 if the (init) syntax was used. */
6369 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6370 tree asmspec_tree
, int flags
)
6373 vec
<tree
, va_gc
> *cleanups
= NULL
;
6374 const char *asmspec
= NULL
;
6375 int was_readonly
= 0;
6376 bool var_definition_p
= false;
6379 if (decl
== error_mark_node
)
6384 error ("assignment (not initialization) in declaration");
6388 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6389 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6390 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6392 type
= TREE_TYPE (decl
);
6393 if (type
== error_mark_node
)
6396 /* If a name was specified, get the string. */
6397 if (at_namespace_scope_p ())
6398 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6399 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6400 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6402 if (current_class_type
6403 && CP_DECL_CONTEXT (decl
) == current_class_type
6404 && TYPE_BEING_DEFINED (current_class_type
)
6405 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6406 && (DECL_INITIAL (decl
) || init
))
6407 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6409 if (TREE_CODE (decl
) != FUNCTION_DECL
6410 && (auto_node
= type_uses_auto (type
)))
6413 if (init
== NULL_TREE
)
6415 if (DECL_LANG_SPECIFIC (decl
)
6416 && DECL_TEMPLATE_INSTANTIATION (decl
)
6417 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6419 /* init is null because we're deferring instantiating the
6420 initializer until we need it. Well, we need it now. */
6421 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6425 error ("declaration of %q#D has no initializer", decl
);
6426 TREE_TYPE (decl
) = error_mark_node
;
6430 if (TREE_CODE (d_init
) == TREE_LIST
)
6431 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6432 tf_warning_or_error
);
6433 d_init
= resolve_nondeduced_context (d_init
);
6434 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6436 if (type
== error_mark_node
)
6438 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6441 if (!ensure_literal_type_for_constexpr_object (decl
))
6442 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6445 && DECL_CLASS_SCOPE_P (decl
)
6446 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6447 check_static_variable_definition (decl
, type
);
6449 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6452 if (init
== ridpointers
[(int)RID_DELETE
])
6454 /* FIXME check this is 1st decl. */
6455 DECL_DELETED_FN (decl
) = 1;
6456 DECL_DECLARED_INLINE_P (decl
) = 1;
6457 DECL_INITIAL (decl
) = error_mark_node
;
6458 FOR_EACH_CLONE (clone
, decl
)
6460 DECL_DELETED_FN (clone
) = 1;
6461 DECL_DECLARED_INLINE_P (clone
) = 1;
6462 DECL_INITIAL (clone
) = error_mark_node
;
6466 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6468 if (defaultable_fn_check (decl
))
6469 DECL_DEFAULTED_FN (decl
) = 1;
6471 DECL_INITIAL (decl
) = NULL_TREE
;
6475 if (init
&& VAR_P (decl
))
6477 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6478 /* If DECL is a reference, then we want to know whether init is a
6479 reference constant; init_const_expr_p as passed tells us whether
6480 it's an rvalue constant. */
6481 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6482 init_const_expr_p
= potential_constant_expression (init
);
6483 if (init_const_expr_p
)
6485 /* Set these flags now for templates. We'll update the flags in
6486 store_init_value for instantiations. */
6487 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6488 if (decl_maybe_constant_var_p (decl
))
6489 TREE_CONSTANT (decl
) = 1;
6493 if (processing_template_decl
)
6495 bool type_dependent_p
;
6497 /* Add this declaration to the statement-tree. */
6498 if (at_function_scope_p ())
6499 add_decl_expr (decl
);
6501 type_dependent_p
= dependent_type_p (type
);
6503 if (check_for_bare_parameter_packs (init
))
6506 DECL_INITIAL (decl
) = NULL_TREE
;
6509 /* Generally, initializers in templates are expanded when the
6510 template is instantiated. But, if DECL is a variable constant
6511 then it can be used in future constant expressions, so its value
6512 must be available. */
6514 if (!VAR_P (decl
) || dependent_type_p (type
))
6515 /* We can't do anything if the decl has dependent type. */;
6517 && init_const_expr_p
6518 && !type_dependent_p
6519 && TREE_CODE (type
) != REFERENCE_TYPE
6520 && decl_maybe_constant_var_p (decl
)
6521 && !type_dependent_init_p (init
)
6522 && !value_dependent_init_p (init
))
6524 /* This variable seems to be a non-dependent constant, so process
6525 its initializer. If check_initializer returns non-null the
6526 initialization wasn't constant after all. */
6528 cleanups
= make_tree_vector ();
6529 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6530 if (init_code
== NULL_TREE
)
6532 release_tree_vector (cleanups
);
6534 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6536 /* Deduce array size even if the initializer is dependent. */
6537 maybe_deduce_size_from_array_init (decl
, init
);
6538 /* And complain about multiple initializers. */
6539 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6540 && !MAYBE_CLASS_TYPE_P (type
))
6541 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6542 tf_warning_or_error
);
6546 DECL_INITIAL (decl
) = init
;
6550 /* Just store non-static data member initializers for later. */
6551 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6552 DECL_INITIAL (decl
) = init
;
6554 /* Take care of TYPE_DECLs up front. */
6555 if (TREE_CODE (decl
) == TYPE_DECL
)
6557 if (type
!= error_mark_node
6558 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6560 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6561 warning (0, "shadowing previous type declaration of %q#D", decl
);
6562 set_identifier_type_value (DECL_NAME (decl
), decl
);
6565 /* If we have installed this as the canonical typedef for this
6566 type, and that type has not been defined yet, delay emitting
6567 the debug information for it, as we will emit it later. */
6568 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6569 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6570 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6572 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6577 /* A reference will be modified here, as it is initialized. */
6578 if (! DECL_EXTERNAL (decl
)
6579 && TREE_READONLY (decl
)
6580 && TREE_CODE (type
) == REFERENCE_TYPE
)
6583 TREE_READONLY (decl
) = 0;
6588 /* If this is a local variable that will need a mangled name,
6589 register it now. We must do this before processing the
6590 initializer for the variable, since the initialization might
6591 require a guard variable, and since the mangled name of the
6592 guard variable will depend on the mangled name of this
6594 if (DECL_FUNCTION_SCOPE_P (decl
)
6595 && TREE_STATIC (decl
)
6596 && !DECL_ARTIFICIAL (decl
))
6598 push_local_name (decl
);
6599 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6600 || DECL_DESTRUCTOR_P (current_function_decl
))
6601 /* Normally local_decls is populated during GIMPLE lowering,
6602 but [cd]tors are never actually compiled directly. We need
6603 to put statics on the list so we can deal with the label
6604 address extension. FIXME. */
6605 add_local_decl (cfun
, decl
);
6608 /* Convert the initializer to the type of DECL, if we have not
6609 already initialized DECL. */
6610 if (!DECL_INITIALIZED_P (decl
)
6611 /* If !DECL_EXTERNAL then DECL is being defined. In the
6612 case of a static data member initialized inside the
6613 class-specifier, there can be an initializer even if DECL
6614 is *not* defined. */
6615 && (!DECL_EXTERNAL (decl
) || init
))
6617 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6620 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6621 /* Allow libjava/prims.cc define primitive classes. */
6622 if (init
!= NULL_TREE
6623 || jclass
== NULL_TREE
6624 || TREE_CODE (jclass
) != TYPE_DECL
6625 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6626 || !same_type_ignoring_top_level_qualifiers_p
6627 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6628 error ("Java object %qD not allocated with %<new%>", decl
);
6631 cleanups
= make_tree_vector ();
6632 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6638 The memory occupied by any object of static storage
6639 duration is zero-initialized at program startup before
6640 any other initialization takes place.
6642 We cannot create an appropriate initializer until after
6643 the type of DECL is finalized. If DECL_INITIAL is set,
6644 then the DECL is statically initialized, and any
6645 necessary zero-initialization has already been performed. */
6646 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6647 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6648 /*nelts=*/NULL_TREE
,
6649 /*static_storage_p=*/true);
6650 /* Remember that the initialization for this variable has
6652 DECL_INITIALIZED_P (decl
) = 1;
6653 /* This declaration is the definition of this variable,
6654 unless we are initializing a static data member within
6655 the class specifier. */
6656 if (!DECL_EXTERNAL (decl
))
6657 var_definition_p
= true;
6659 /* If the variable has an array type, lay out the type, even if
6660 there is no initializer. It is valid to index through the
6661 array, and we must get TYPE_ALIGN set correctly on the array
6663 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6666 if (TREE_STATIC (decl
)
6667 && !at_function_scope_p ()
6668 && current_function_decl
== NULL
)
6669 /* So decl is a global variable or a static member of a
6670 non local class. Record the types it uses
6671 so that we can decide later to emit debug info for them. */
6672 record_types_used_by_current_var_decl (decl
);
6674 else if (TREE_CODE (decl
) == FIELD_DECL
6675 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6676 error ("non-static data member %qD has Java class type", decl
);
6678 /* Add this declaration to the statement-tree. This needs to happen
6679 after the call to check_initializer so that the DECL_EXPR for a
6680 reference temp is added before the DECL_EXPR for the reference itself. */
6681 if (DECL_FUNCTION_SCOPE_P (decl
))
6683 /* If we're building a variable sized type, and we might be
6684 reachable other than via the top of the current binding
6685 level, then create a new BIND_EXPR so that we deallocate
6686 the object at the right time. */
6689 && !TREE_CONSTANT (DECL_SIZE (decl
))
6690 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6693 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6694 TREE_SIDE_EFFECTS (bind
) = 1;
6696 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6698 add_decl_expr (decl
);
6701 /* Let the middle end know about variables and functions -- but not
6702 static data members in uninstantiated class templates. */
6703 if (VAR_OR_FUNCTION_DECL_P (decl
))
6707 layout_var_decl (decl
);
6708 maybe_commonize_var (decl
);
6711 /* This needs to happen after the linkage is set. */
6712 determine_visibility (decl
);
6714 if (var_definition_p
&& TREE_STATIC (decl
))
6716 /* If a TREE_READONLY variable needs initialization
6717 at runtime, it is no longer readonly and we need to
6718 avoid MEM_READONLY_P being set on RTL created for it. */
6721 if (TREE_READONLY (decl
))
6722 TREE_READONLY (decl
) = 0;
6725 else if (was_readonly
)
6726 TREE_READONLY (decl
) = 1;
6728 /* Likewise if it needs destruction. */
6729 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6730 TREE_READONLY (decl
) = 0;
6733 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6735 /* Check for abstractness of the type. Notice that there is no
6736 need to strip array types here since the check for those types
6737 is already done within create_array_type_for_decl. */
6738 abstract_virtuals_error (decl
, type
);
6740 if (TREE_TYPE (decl
) == error_mark_node
)
6741 /* No initialization required. */
6743 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6747 if (init
== ridpointers
[(int)RID_DEFAULT
])
6749 /* An out-of-class default definition is defined at
6750 the point where it is explicitly defaulted. */
6751 if (DECL_DELETED_FN (decl
))
6752 maybe_explain_implicit_delete (decl
);
6753 else if (DECL_INITIAL (decl
) == error_mark_node
)
6754 synthesize_method (decl
);
6757 error ("function %q#D is initialized like a variable", decl
);
6759 /* else no initialization required. */
6761 else if (DECL_EXTERNAL (decl
)
6762 && ! (DECL_LANG_SPECIFIC (decl
)
6763 && DECL_NOT_REALLY_EXTERN (decl
)))
6766 DECL_INITIAL (decl
) = init
;
6768 /* A variable definition. */
6769 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6770 /* Initialize the local variable. */
6771 initialize_local_var (decl
, init
);
6773 /* If a variable is defined, and then a subsequent
6774 definition with external linkage is encountered, we will
6775 get here twice for the same variable. We want to avoid
6776 calling expand_static_init more than once. For variables
6777 that are not static data members, we can call
6778 expand_static_init only when we actually process the
6779 initializer. It is not legal to redeclare a static data
6780 member, so this issue does not arise in that case. */
6781 else if (var_definition_p
&& TREE_STATIC (decl
))
6782 expand_static_init (decl
, init
);
6785 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6786 reference, insert it in the statement-tree now. */
6790 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6791 push_cleanup (decl
, t
, false);
6792 release_tree_vector (cleanups
);
6796 TREE_READONLY (decl
) = 1;
6798 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6801 /* Returns a declaration for a VAR_DECL as if:
6803 extern "C" TYPE NAME;
6805 had been seen. Used to create compiler-generated global
6809 declare_global_var (tree name
, tree type
)
6813 push_to_top_level ();
6814 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6815 TREE_PUBLIC (decl
) = 1;
6816 DECL_EXTERNAL (decl
) = 1;
6817 DECL_ARTIFICIAL (decl
) = 1;
6818 /* If the user has explicitly declared this variable (perhaps
6819 because the code we are compiling is part of a low-level runtime
6820 library), then it is possible that our declaration will be merged
6821 with theirs by pushdecl. */
6822 decl
= pushdecl (decl
);
6823 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6824 pop_from_top_level ();
6829 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6830 if "__cxa_atexit" is not being used) corresponding to the function
6831 to be called when the program exits. */
6834 get_atexit_fn_ptr_type (void)
6838 if (!atexit_fn_ptr_type_node
)
6841 if (flag_use_cxa_atexit
6842 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6843 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6844 arg_type
= ptr_type_node
;
6846 /* The parameter to "atexit" is "void (*)(void)". */
6847 arg_type
= NULL_TREE
;
6849 fn_type
= build_function_type_list (void_type_node
,
6850 arg_type
, NULL_TREE
);
6851 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6854 return atexit_fn_ptr_type_node
;
6857 /* Returns a pointer to the `atexit' function. Note that if
6858 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6859 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6862 get_atexit_node (void)
6868 bool use_aeabi_atexit
;
6873 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6875 /* The declaration for `__cxa_atexit' is:
6877 int __cxa_atexit (void (*)(void *), void *, void *)
6879 We build up the argument types and then the function type
6881 tree argtype0
, argtype1
, argtype2
;
6883 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6884 /* First, build the pointer-to-function type for the first
6886 fn_ptr_type
= get_atexit_fn_ptr_type ();
6887 /* Then, build the rest of the argument types. */
6888 argtype2
= ptr_type_node
;
6889 if (use_aeabi_atexit
)
6891 argtype1
= fn_ptr_type
;
6892 argtype0
= ptr_type_node
;
6896 argtype1
= ptr_type_node
;
6897 argtype0
= fn_ptr_type
;
6899 /* And the final __cxa_atexit type. */
6900 fn_type
= build_function_type_list (integer_type_node
,
6901 argtype0
, argtype1
, argtype2
,
6903 if (use_aeabi_atexit
)
6904 name
= "__aeabi_atexit";
6906 name
= "__cxa_atexit";
6910 /* The declaration for `atexit' is:
6912 int atexit (void (*)());
6914 We build up the argument types and then the function type
6916 fn_ptr_type
= get_atexit_fn_ptr_type ();
6917 /* Build the final atexit type. */
6918 fn_type
= build_function_type_list (integer_type_node
,
6919 fn_ptr_type
, NULL_TREE
);
6923 /* Now, build the function declaration. */
6924 push_lang_context (lang_name_c
);
6925 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6926 mark_used (atexit_fndecl
);
6927 pop_lang_context ();
6928 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6933 /* Like get_atexit_node, but for thread-local cleanups. */
6936 get_thread_atexit_node (void)
6938 /* The declaration for `__cxa_thread_atexit' is:
6940 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6941 tree fn_type
= build_function_type_list (integer_type_node
,
6942 get_atexit_fn_ptr_type (),
6943 ptr_type_node
, ptr_type_node
,
6946 /* Now, build the function declaration. */
6947 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6948 ECF_LEAF
| ECF_NOTHROW
);
6949 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6952 /* Returns the __dso_handle VAR_DECL. */
6955 get_dso_handle_node (void)
6957 if (dso_handle_node
)
6958 return dso_handle_node
;
6960 /* Declare the variable. */
6961 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6964 #ifdef HAVE_GAS_HIDDEN
6965 if (dso_handle_node
!= error_mark_node
)
6967 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6968 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6972 return dso_handle_node
;
6975 /* Begin a new function with internal linkage whose job will be simply
6976 to destroy some particular variable. */
6978 static GTY(()) int start_cleanup_cnt
;
6981 start_cleanup_fn (void)
6986 bool use_cxa_atexit
= flag_use_cxa_atexit
6987 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6989 push_to_top_level ();
6991 /* No need to mangle this. */
6992 push_lang_context (lang_name_c
);
6994 /* Build the name of the function. */
6995 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6996 /* Build the function declaration. */
6997 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6998 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6999 /* It's a function with internal linkage, generated by the
7001 TREE_PUBLIC (fndecl
) = 0;
7002 DECL_ARTIFICIAL (fndecl
) = 1;
7003 /* Make the function `inline' so that it is only emitted if it is
7004 actually needed. It is unlikely that it will be inlined, since
7005 it is only called via a function pointer, but we avoid unnecessary
7006 emissions this way. */
7007 DECL_DECLARED_INLINE_P (fndecl
) = 1;
7008 DECL_INTERFACE_KNOWN (fndecl
) = 1;
7009 /* Build the parameter. */
7014 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
7015 DECL_CONTEXT (parmdecl
) = fndecl
;
7016 TREE_USED (parmdecl
) = 1;
7017 DECL_READ_P (parmdecl
) = 1;
7018 DECL_ARGUMENTS (fndecl
) = parmdecl
;
7022 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
7024 pop_lang_context ();
7026 return current_function_decl
;
7029 /* Finish the cleanup function begun by start_cleanup_fn. */
7032 end_cleanup_fn (void)
7034 expand_or_defer_fn (finish_function (0));
7036 pop_from_top_level ();
7039 /* Generate code to handle the destruction of DECL, an object with
7040 static storage duration. */
7043 register_dtor_fn (tree decl
)
7050 bool ob_parm
, dso_parm
, use_dtor
;
7051 tree arg0
, arg1
, arg2
;
7054 type
= TREE_TYPE (decl
);
7055 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7058 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7059 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7060 destructor to "__cxa_atexit"; we don't have to build a temporary
7061 function to do the cleanup. */
7062 dso_parm
= (flag_use_cxa_atexit
7063 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7064 ob_parm
= (CP_DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7065 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7070 /* Find the destructor. */
7071 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7072 gcc_assert (idx
>= 0);
7073 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7074 /* Make sure it is accessible. */
7075 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7076 tf_warning_or_error
);
7080 /* Call build_cleanup before we enter the anonymous function so
7081 that any access checks will be done relative to the current
7082 scope, rather than the scope of the anonymous function. */
7083 build_cleanup (decl
);
7085 /* Now start the function. */
7086 cleanup
= start_cleanup_fn ();
7088 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7089 to the original function, rather than the anonymous one. That
7090 will make the back end think that nested functions are in use,
7091 which causes confusion. */
7092 push_deferring_access_checks (dk_no_check
);
7093 fcall
= build_cleanup (decl
);
7094 pop_deferring_access_checks ();
7096 /* Create the body of the anonymous function. */
7097 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7098 finish_expr_stmt (fcall
);
7099 finish_compound_stmt (compound_stmt
);
7103 /* Call atexit with the cleanup function. */
7104 mark_used (cleanup
);
7105 cleanup
= build_address (cleanup
);
7107 if (CP_DECL_THREAD_LOCAL_P (decl
))
7108 atex_node
= get_thread_atexit_node ();
7110 atex_node
= get_atexit_node ();
7114 /* We must convert CLEANUP to the type that "__cxa_atexit"
7116 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7117 /* "__cxa_atexit" will pass the address of DECL to the
7118 cleanup function. */
7120 addr
= build_address (decl
);
7121 /* The declared type of the parameter to "__cxa_atexit" is
7122 "void *". For plain "T*", we could just let the
7123 machinery in cp_build_function_call convert it -- but if the
7124 type is "cv-qualified T *", then we need to convert it
7125 before passing it in, to avoid spurious errors. */
7126 addr
= build_nop (ptr_type_node
, addr
);
7129 /* Since the cleanup functions we build ignore the address
7130 they're given, there's no reason to pass the actual address
7131 in, and, in general, it's cheaper to pass NULL than any
7133 addr
= null_pointer_node
;
7136 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7137 tf_warning_or_error
);
7139 /* Just pass NULL to the dso handle parm if we don't actually
7140 have a DSO handle on this target. */
7141 arg2
= null_pointer_node
;
7147 if (!CP_DECL_THREAD_LOCAL_P (decl
)
7148 && targetm
.cxx
.use_aeabi_atexit ())
7164 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7165 arg0
, arg1
, arg2
, NULL_TREE
);
7168 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7169 is its initializer. Generate code to handle the construction
7170 and destruction of DECL. */
7173 expand_static_init (tree decl
, tree init
)
7175 gcc_assert (VAR_P (decl
));
7176 gcc_assert (TREE_STATIC (decl
));
7178 /* Some variables require no dynamic initialization. */
7179 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7181 /* Make sure the destructor is callable. */
7182 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7187 if (CP_DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7188 && !DECL_FUNCTION_SCOPE_P (decl
))
7191 error ("non-local variable %qD declared %<__thread%> "
7192 "needs dynamic initialization", decl
);
7194 error ("non-local variable %qD declared %<__thread%> "
7195 "has a non-trivial destructor", decl
);
7196 static bool informed
;
7199 inform (DECL_SOURCE_LOCATION (decl
),
7200 "C++11 %<thread_local%> allows dynamic initialization "
7207 if (DECL_FUNCTION_SCOPE_P (decl
))
7209 /* Emit code to perform this initialization but once. */
7210 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7211 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7212 tree guard
, guard_addr
;
7214 /* We don't need thread-safety code for thread-local vars. */
7215 bool thread_guard
= (flag_threadsafe_statics
7216 && !CP_DECL_THREAD_LOCAL_P (decl
));
7218 /* Emit code to perform this initialization but once. This code
7221 static <type> guard;
7222 if (!__atomic_load (guard.first_byte)) {
7223 if (__cxa_guard_acquire (&guard)) {
7226 // Do initialization.
7227 flag = true; __cxa_guard_release (&guard);
7228 // Register variable for destruction at end of program.
7230 if (!flag) __cxa_guard_abort (&guard);
7234 Note that the `flag' variable is only set to 1 *after* the
7235 initialization is complete. This ensures that an exception,
7236 thrown during the construction, will cause the variable to
7237 reinitialized when we pass through this code again, as per:
7241 If the initialization exits by throwing an exception, the
7242 initialization is not complete, so it will be tried again
7243 the next time control enters the declaration.
7245 This process should be thread-safe, too; multiple threads
7246 should not be able to initialize the variable more than
7249 /* Create the guard variable. */
7250 guard
= get_guard (decl
);
7252 /* Begin the conditional initialization. */
7253 if_stmt
= begin_if_stmt ();
7255 finish_if_stmt_cond (get_guard_cond (guard
, thread_guard
), if_stmt
);
7256 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7260 tree vfntype
= NULL_TREE
;
7261 tree acquire_name
, release_name
, abort_name
;
7262 tree acquire_fn
, release_fn
, abort_fn
;
7263 guard_addr
= build_address (guard
);
7265 acquire_name
= get_identifier ("__cxa_guard_acquire");
7266 release_name
= get_identifier ("__cxa_guard_release");
7267 abort_name
= get_identifier ("__cxa_guard_abort");
7268 acquire_fn
= identifier_global_value (acquire_name
);
7269 release_fn
= identifier_global_value (release_name
);
7270 abort_fn
= identifier_global_value (abort_name
);
7272 acquire_fn
= push_library_fn
7273 (acquire_name
, build_function_type_list (integer_type_node
,
7274 TREE_TYPE (guard_addr
),
7276 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7277 if (!release_fn
|| !abort_fn
)
7278 vfntype
= build_function_type_list (void_type_node
,
7279 TREE_TYPE (guard_addr
),
7282 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7283 ECF_NOTHROW
| ECF_LEAF
);
7285 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7286 ECF_NOTHROW
| ECF_LEAF
);
7288 inner_if_stmt
= begin_if_stmt ();
7289 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7292 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7293 begin
= get_target_expr (boolean_false_node
);
7294 flag
= TARGET_EXPR_SLOT (begin
);
7296 TARGET_EXPR_CLEANUP (begin
)
7297 = build3 (COND_EXPR
, void_type_node
, flag
,
7299 build_call_n (abort_fn
, 1, guard_addr
));
7300 CLEANUP_EH_ONLY (begin
) = 1;
7302 /* Do the initialization itself. */
7303 init
= add_stmt_to_compound (begin
, init
);
7304 init
= add_stmt_to_compound
7305 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7306 init
= add_stmt_to_compound
7307 (init
, build_call_n (release_fn
, 1, guard_addr
));
7310 init
= add_stmt_to_compound (init
, set_guard (guard
));
7312 /* Use atexit to register a function for destroying this static
7314 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7316 finish_expr_stmt (init
);
7320 finish_compound_stmt (inner_then_clause
);
7321 finish_then_clause (inner_if_stmt
);
7322 finish_if_stmt (inner_if_stmt
);
7325 finish_compound_stmt (then_clause
);
7326 finish_then_clause (if_stmt
);
7327 finish_if_stmt (if_stmt
);
7329 else if (CP_DECL_THREAD_LOCAL_P (decl
))
7330 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7332 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7336 /* Make TYPE a complete type based on INITIAL_VALUE.
7337 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7338 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7339 3 if the initializer list is empty (in pedantic mode). */
7342 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7345 tree type
, elt_type
;
7347 /* Don't get confused by a CONSTRUCTOR for some other type. */
7348 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7349 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7354 unsigned HOST_WIDE_INT i
;
7357 /* An array of character type can be initialized from a
7358 brace-enclosed string constant.
7360 FIXME: this code is duplicated from reshape_init. Probably
7361 we should just call reshape_init here? */
7362 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7363 && TREE_CODE (initial_value
) == CONSTRUCTOR
7364 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7366 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7367 tree value
= (*v
)[0].value
;
7369 if (TREE_CODE (value
) == STRING_CST
7370 && v
->length () == 1)
7371 initial_value
= value
;
7374 /* If any of the elements are parameter packs, we can't actually
7375 complete this type now because the array size is dependent. */
7376 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7378 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7381 if (PACK_EXPANSION_P (value
))
7387 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7389 /* We can create the array before the element type is complete, which
7390 means that we didn't have these two bits set in the original type
7391 either. In completing the type, we are expected to propagate these
7392 bits. See also complete_type which does the same thing for arrays
7395 if (TYPE_DOMAIN (type
))
7397 elt_type
= TREE_TYPE (type
);
7398 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7399 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7400 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7406 /* As above, but either give an error or reject zero-size arrays, depending
7410 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7411 bool do_default
, tsubst_flags_t complain
)
7414 bool sfinae
= !(complain
& tf_error
);
7415 /* In SFINAE context we can't be lenient about zero-size arrays. */
7418 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7424 /* Not an error. */;
7425 else if (failure
== 1)
7426 error ("initializer fails to determine size of %qT", *ptype
);
7427 else if (failure
== 2)
7430 error ("array size missing in %qT", *ptype
);
7432 else if (failure
== 3)
7433 error ("zero-size array %qT", *ptype
);
7434 *ptype
= error_mark_node
;
7439 /* Return zero if something is declared to be a member of type
7440 CTYPE when in the context of CUR_TYPE. STRING is the error
7441 message to print in that case. Otherwise, quietly return 1. */
7444 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7446 if (ctype
&& ctype
!= cur_type
)
7448 if (flags
== DTOR_FLAG
)
7449 error ("destructor for alien class %qT cannot be a member", ctype
);
7451 error ("constructor for alien class %qT cannot be a member", ctype
);
7457 /* Subroutine of `grokdeclarator'. */
7459 /* Generate errors possibly applicable for a given set of specifiers.
7460 This is for ARM $7.1.2. */
7463 bad_specifiers (tree object
,
7464 enum bad_spec_place type
,
7475 error ("%qD declared as a %<virtual%> variable", object
);
7477 error ("%qD declared as an %<inline%> variable", object
);
7479 error ("%<const%> and %<volatile%> function specifiers on "
7480 "%qD invalid in variable declaration", object
);
7484 error ("%qD declared as a %<virtual%> parameter", object
);
7486 error ("%qD declared as an %<inline%> parameter", object
);
7488 error ("%<const%> and %<volatile%> function specifiers on "
7489 "%qD invalid in parameter declaration", object
);
7493 error ("%qD declared as a %<virtual%> type", object
);
7495 error ("%qD declared as an %<inline%> type", object
);
7497 error ("%<const%> and %<volatile%> function specifiers on "
7498 "%qD invalid in type declaration", object
);
7502 error ("%qD declared as a %<virtual%> field", object
);
7504 error ("%qD declared as an %<inline%> field", object
);
7506 error ("%<const%> and %<volatile%> function specifiers on "
7507 "%qD invalid in field declaration", object
);
7513 error ("%q+D declared as a friend", object
);
7515 && (TREE_CODE (object
) == TYPE_DECL
7516 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7517 && !TYPE_REFFN_P (TREE_TYPE (object
))
7518 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7519 error ("%q+D declared with an exception specification", object
);
7522 /* DECL is a member function or static data member and is presently
7523 being defined. Check that the definition is taking place in a
7527 check_class_member_definition_namespace (tree decl
)
7529 /* These checks only apply to member functions and static data
7531 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7532 /* We check for problems with specializations in pt.c in
7533 check_specialization_namespace, where we can issue better
7535 if (processing_specialization
)
7537 /* There are no restrictions on the placement of
7538 explicit instantiations. */
7539 if (processing_explicit_instantiation
)
7543 A member function definition that appears outside of the
7544 class definition shall appear in a namespace scope enclosing
7545 the class definition.
7549 The definition for a static data member shall appear in a
7550 namespace scope enclosing the member's class definition. */
7551 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7552 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7553 decl
, DECL_CONTEXT (decl
));
7556 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7557 METHOD_TYPE for a non-static member function; QUALS are the
7558 cv-qualifiers that apply to the function. */
7561 build_this_parm (tree type
, cp_cv_quals quals
)
7566 cp_cv_quals this_quals
;
7568 if (CLASS_TYPE_P (type
))
7571 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7572 this_type
= build_pointer_type (this_type
);
7575 this_type
= type_of_this_parm (type
);
7576 /* The `this' parameter is implicitly `const'; it cannot be
7578 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7579 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7580 parm
= build_artificial_parm (this_identifier
, qual_type
);
7581 cp_apply_type_quals_to_decl (this_quals
, parm
);
7585 /* DECL is a static member function. Complain if it was declared
7586 with function-cv-quals. */
7589 check_static_quals (tree decl
, cp_cv_quals quals
)
7591 if (quals
!= TYPE_UNQUALIFIED
)
7592 error ("static member function %q#D declared with type qualifiers",
7596 /* Helper function. Replace the temporary this parameter injected
7597 during cp_finish_omp_declare_simd with the real this parameter. */
7600 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7602 tree this_parm
= (tree
) data
;
7603 if (TREE_CODE (*tp
) == PARM_DECL
7604 && DECL_NAME (*tp
) == this_identifier
7605 && *tp
!= this_parm
)
7607 else if (TYPE_P (*tp
))
7612 /* CTYPE is class type, or null if non-class.
7613 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7615 DECLARATOR is the function's name.
7616 PARMS is a chain of PARM_DECLs for the function.
7617 VIRTUALP is truthvalue of whether the function is virtual or not.
7618 FLAGS are to be passed through to `grokclassfn'.
7619 QUALS are qualifiers indicating whether the function is `const'
7621 RAISES is a list of exceptions that this function can raise.
7622 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7623 not look, and -1 if we should not call `grokclassfn' at all.
7625 SFK is the kind of special function (if any) for the new function.
7627 Returns `NULL_TREE' if something goes wrong, after issuing
7628 applicable error messages. */
7631 grokfndecl (tree ctype
,
7635 tree orig_declarator
,
7637 enum overload_flags flags
,
7639 cp_ref_qualifier rqual
,
7646 special_function_kind sfk
,
7651 location_t location
)
7654 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7658 type
= build_ref_qualified_type (type
, rqual
);
7660 type
= build_exception_variant (type
, raises
);
7662 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7664 /* If we have an explicit location, use it, otherwise use whatever
7665 build_lang_decl used (probably input_location). */
7666 if (location
!= UNKNOWN_LOCATION
)
7667 DECL_SOURCE_LOCATION (decl
) = location
;
7669 if (TREE_CODE (type
) == METHOD_TYPE
)
7672 parm
= build_this_parm (type
, quals
);
7673 DECL_CHAIN (parm
) = parms
;
7676 DECL_ARGUMENTS (decl
) = parms
;
7677 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7678 DECL_CONTEXT (t
) = decl
;
7679 /* Propagate volatile out from type to decl. */
7680 if (TYPE_VOLATILE (type
))
7681 TREE_THIS_VOLATILE (decl
) = 1;
7683 /* Setup decl according to sfk. */
7686 case sfk_constructor
:
7687 case sfk_copy_constructor
:
7688 case sfk_move_constructor
:
7689 DECL_CONSTRUCTOR_P (decl
) = 1;
7691 case sfk_destructor
:
7692 DECL_DESTRUCTOR_P (decl
) = 1;
7698 /* If pointers to member functions use the least significant bit to
7699 indicate whether a function is virtual, ensure a pointer
7700 to this function will have that bit clear. */
7701 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7702 && TREE_CODE (type
) == METHOD_TYPE
7703 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7704 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7707 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7711 ("defining explicit specialization %qD in friend declaration",
7715 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7716 tree args
= TREE_OPERAND (orig_declarator
, 1);
7718 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7720 /* Something like `template <class T> friend void f<T>()'. */
7721 error ("invalid use of template-id %qD in declaration "
7722 "of primary template",
7728 /* A friend declaration of the form friend void f<>(). Record
7729 the information in the TEMPLATE_ID_EXPR. */
7730 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7732 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7733 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7735 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7736 if (TREE_PURPOSE (t
)
7737 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7739 error ("default arguments are not allowed in declaration "
7740 "of friend template specialization %qD",
7747 error ("%<inline%> is not allowed in declaration of friend "
7748 "template specialization %qD",
7755 /* If this decl has namespace scope, set that up. */
7757 set_decl_namespace (decl
, in_namespace
, friendp
);
7759 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7761 /* `main' and builtins have implicit 'C' linkage. */
7762 if ((MAIN_NAME_P (declarator
)
7763 || (IDENTIFIER_LENGTH (declarator
) > 10
7764 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7765 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7766 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7767 || (targetcm
.cxx_implicit_extern_c
7768 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7769 && current_lang_name
== lang_name_cplusplus
7770 && ctype
== NULL_TREE
7771 && DECL_FILE_SCOPE_P (decl
))
7772 SET_DECL_LANGUAGE (decl
, lang_c
);
7774 /* Should probably propagate const out from type to decl I bet (mrs). */
7777 DECL_STATIC_FUNCTION_P (decl
) = 1;
7778 DECL_CONTEXT (decl
) = ctype
;
7782 DECL_DELETED_FN (decl
) = 1;
7786 DECL_CONTEXT (decl
) = ctype
;
7788 check_class_member_definition_namespace (decl
);
7791 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7793 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7794 error ("cannot declare %<::main%> to be a template");
7796 error ("cannot declare %<::main%> to be inline");
7798 error ("cannot declare %<::main%> to be constexpr");
7800 error ("cannot declare %<::main%> to be static");
7805 /* Members of anonymous types and local classes have no linkage; make
7806 them internal. If a typedef is made later, this will be changed. */
7807 if (ctype
&& (!TREE_PUBLIC (TYPE_MAIN_DECL (ctype
))
7808 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7811 if (publicp
&& cxx_dialect
== cxx98
)
7813 /* [basic.link]: A name with no linkage (notably, the name of a class
7814 or enumeration declared in a local scope) shall not be used to
7815 declare an entity with linkage.
7817 DR 757 relaxes this restriction for C++0x. */
7818 no_linkage_error (decl
);
7821 TREE_PUBLIC (decl
) = publicp
;
7824 DECL_INTERFACE_KNOWN (decl
) = 1;
7825 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7828 /* If the declaration was declared inline, mark it as such. */
7831 DECL_DECLARED_INLINE_P (decl
) = 1;
7833 DECL_COMDAT (decl
) = 1;
7836 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7838 DECL_EXTERNAL (decl
) = 1;
7839 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7844 ? G_("static member function %qD cannot have cv-qualifier")
7845 : G_("non-member function %qD cannot have cv-qualifier"),
7847 quals
= TYPE_UNQUALIFIED
;
7853 ? G_("static member function %qD cannot have ref-qualifier")
7854 : G_("non-member function %qD cannot have ref-qualifier"),
7856 rqual
= REF_QUAL_NONE
;
7860 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7861 && !grok_op_properties (decl
, /*complain=*/true))
7863 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7865 bool long_long_unsigned_p
;
7867 const char *suffix
= NULL
;
7868 /* [over.literal]/6: Literal operators shall not have C linkage. */
7869 if (DECL_LANGUAGE (decl
) == lang_c
)
7871 error ("literal operator with C linkage");
7875 if (DECL_NAMESPACE_SCOPE_P (decl
))
7877 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7880 error ("%qD has invalid argument list", decl
);
7884 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7885 if (long_long_unsigned_p
)
7887 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7888 warning (0, "integer suffix %<%s%>"
7889 " shadowed by implementation", suffix
);
7891 else if (long_double_p
)
7893 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7894 warning (0, "floating point suffix %<%s%>"
7895 " shadowed by implementation", suffix
);
7900 error ("%qD must be a non-member function", decl
);
7906 /* Make the init_value nonzero so pushdecl knows this is not
7907 tentative. error_mark_node is replaced later with the BLOCK. */
7908 DECL_INITIAL (decl
) = error_mark_node
;
7910 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7911 TREE_NOTHROW (decl
) = 1;
7913 if (flag_openmp
|| flag_cilkplus
)
7915 /* Adjust "omp declare simd" attributes. */
7916 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7920 for (attr
= ods
; attr
;
7921 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7923 if (TREE_CODE (type
) == METHOD_TYPE
)
7924 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7925 DECL_ARGUMENTS (decl
), NULL
);
7926 if (TREE_VALUE (attr
) != NULL_TREE
)
7928 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7929 cl
= c_omp_declare_simd_clauses_to_numbers
7930 (DECL_ARGUMENTS (decl
), cl
);
7932 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7934 TREE_VALUE (attr
) = NULL_TREE
;
7940 /* Caller will do the rest of this. */
7944 if (ctype
!= NULL_TREE
)
7945 grokclassfn (ctype
, decl
, flags
);
7948 if (cxx_dialect
>= cxx11
7949 && DECL_DESTRUCTOR_P (decl
)
7950 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7951 && !processing_template_decl
)
7952 deduce_noexcept_on_destructor (decl
);
7954 decl
= check_explicit_specialization (orig_declarator
, decl
,
7957 4 * (friendp
!= 0));
7958 if (decl
== error_mark_node
)
7961 if (DECL_STATIC_FUNCTION_P (decl
))
7962 check_static_quals (decl
, quals
);
7966 cplus_decl_attributes (&decl
, *attrlist
, 0);
7967 *attrlist
= NULL_TREE
;
7970 /* Check main's type after attributes have been applied. */
7971 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7973 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7976 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7978 error ("%<::main%> must return %<int%>");
7979 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7980 TREE_TYPE (decl
) = newtype
;
7983 check_main_parameter_types (decl
);
7986 if (ctype
!= NULL_TREE
7987 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7990 tree old_decl
= check_classfn (ctype
, decl
,
7991 (processing_template_decl
7992 > template_class_depth (ctype
))
7993 ? current_template_parms
7996 if (old_decl
== error_mark_node
)
8004 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
8005 /* Because grokfndecl is always supposed to return a
8006 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
8007 here. We depend on our callers to figure out that its
8008 really a template that's being returned. */
8009 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
8011 if (DECL_STATIC_FUNCTION_P (old_decl
)
8012 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8014 /* Remove the `this' parm added by grokclassfn. */
8015 revert_static_member_fn (decl
);
8016 check_static_quals (decl
, quals
);
8018 if (DECL_ARTIFICIAL (old_decl
))
8020 error ("definition of implicitly-declared %qD", old_decl
);
8023 else if (DECL_DEFAULTED_FN (old_decl
))
8025 error ("definition of explicitly-defaulted %q+D", decl
);
8026 error ("%q+#D explicitly defaulted here", old_decl
);
8030 /* Since we've smashed OLD_DECL to its
8031 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8032 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8033 decl
= DECL_TEMPLATE_RESULT (decl
);
8035 /* Attempt to merge the declarations. This can fail, in
8036 the case of some invalid specialization declarations. */
8037 pushed_scope
= push_scope (ctype
);
8038 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8040 pop_scope (pushed_scope
);
8043 error ("no %q#D member function declared in class %qT",
8047 if (ok
== error_mark_node
)
8053 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8056 if (ctype
== NULL_TREE
|| check
)
8060 DECL_VIRTUAL_P (decl
) = 1;
8065 /* decl is a FUNCTION_DECL.
8066 specifiers are the parsed virt-specifiers.
8068 Set flags to reflect the virt-specifiers.
8073 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8075 if (decl
== NULL_TREE
)
8077 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8078 DECL_OVERRIDE_P (decl
) = 1;
8079 if (specifiers
& VIRT_SPEC_FINAL
)
8080 DECL_FINAL_P (decl
) = 1;
8084 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8085 the linkage that DECL will receive in the object file. */
8088 set_linkage_for_static_data_member (tree decl
)
8090 /* A static data member always has static storage duration and
8091 external linkage. Note that static data members are forbidden in
8092 local classes -- the only situation in which a class has
8093 non-external linkage. */
8094 TREE_PUBLIC (decl
) = 1;
8095 TREE_STATIC (decl
) = 1;
8096 /* For non-template classes, static data members are always put
8097 out in exactly those files where they are defined, just as
8098 with ordinary namespace-scope variables. */
8099 if (!processing_template_decl
)
8100 DECL_INTERFACE_KNOWN (decl
) = 1;
8103 /* Create a VAR_DECL named NAME with the indicated TYPE.
8105 If SCOPE is non-NULL, it is the class type or namespace containing
8106 the variable. If SCOPE is NULL, the variable should is created in
8107 the innermost enclosing scope. */
8110 grokvardecl (tree type
,
8112 tree orig_declarator
,
8113 const cp_decl_specifier_seq
*declspecs
,
8120 tree explicit_scope
;
8122 gcc_assert (!name
|| identifier_p (name
));
8124 /* Compute the scope in which to place the variable, but remember
8125 whether or not that scope was explicitly specified by the user. */
8126 explicit_scope
= scope
;
8129 /* An explicit "extern" specifier indicates a namespace-scope
8131 if (declspecs
->storage_class
== sc_extern
)
8132 scope
= current_decl_namespace ();
8133 else if (!at_function_scope_p ())
8134 scope
= current_scope ();
8138 && (/* If the variable is a namespace-scope variable declared in a
8139 template, we need DECL_LANG_SPECIFIC. */
8140 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8141 /* Similarly for namespace-scope variables with language linkage
8143 || (TREE_CODE (scope
) == NAMESPACE_DECL
8144 && current_lang_name
!= lang_name_cplusplus
)
8145 /* Similarly for static data members. */
8147 /* Similarly for explicit specializations. */
8149 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8150 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8152 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8154 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8155 set_decl_namespace (decl
, explicit_scope
, 0);
8157 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8159 if (declspecs
->storage_class
== sc_extern
)
8161 DECL_THIS_EXTERN (decl
) = 1;
8162 DECL_EXTERNAL (decl
) = !initialized
;
8165 if (DECL_CLASS_SCOPE_P (decl
))
8167 set_linkage_for_static_data_member (decl
);
8168 /* This function is only called with out-of-class definitions. */
8169 DECL_EXTERNAL (decl
) = 0;
8170 check_class_member_definition_namespace (decl
);
8172 /* At top level, either `static' or no s.c. makes a definition
8173 (perhaps tentative), and absence of `static' makes it public. */
8174 else if (toplevel_bindings_p ())
8176 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8177 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8178 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8180 /* Not at top level, only `static' makes a static definition. */
8183 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8184 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8187 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8189 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8191 CP_DECL_THREAD_LOCAL_P (decl
) = true;
8192 if (!processing_template_decl
)
8193 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8195 if (declspecs
->gnu_thread_keyword_p
)
8196 SET_DECL_GNU_TLS_P (decl
);
8199 /* If the type of the decl has no linkage, make sure that we'll
8200 notice that in mark_used. */
8201 if (cxx_dialect
> cxx98
8202 && decl_linkage (decl
) != lk_none
8203 && DECL_LANG_SPECIFIC (decl
) == NULL
8204 && !DECL_EXTERN_C_P (decl
)
8205 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8206 retrofit_lang_decl (decl
);
8208 if (TREE_PUBLIC (decl
))
8210 /* [basic.link]: A name with no linkage (notably, the name of a class
8211 or enumeration declared in a local scope) shall not be used to
8212 declare an entity with linkage.
8214 DR 757 relaxes this restriction for C++0x. */
8215 if (cxx_dialect
< cxx11
)
8216 no_linkage_error (decl
);
8219 DECL_INTERFACE_KNOWN (decl
) = 1;
8221 // Handle explicit specializations and instantiations of variable templates.
8222 if (orig_declarator
)
8223 decl
= check_explicit_specialization (orig_declarator
, decl
,
8226 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8229 /* Create and return a canonical pointer to member function type, for
8230 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8233 build_ptrmemfunc_type (tree type
)
8238 if (type
== error_mark_node
)
8241 /* Make sure that we always have the unqualified pointer-to-member
8243 if (cp_cv_quals quals
= cp_type_quals (type
))
8245 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8246 return cp_build_qualified_type (unqual
, quals
);
8249 /* If a canonical type already exists for this type, use it. We use
8250 this method instead of type_hash_canon, because it only does a
8251 simple equality check on the list of field members. */
8253 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8256 t
= make_node (RECORD_TYPE
);
8258 /* Let the front end know this is a pointer to member function. */
8259 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8261 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8264 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8266 DECL_CHAIN (field
) = fields
;
8269 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8271 /* Zap out the name so that the back end will give us the debugging
8272 information for this anonymous RECORD_TYPE. */
8273 TYPE_NAME (t
) = NULL_TREE
;
8275 /* Cache this pointer-to-member type so that we can find it again
8277 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8279 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8280 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8281 else if (TYPE_CANONICAL (type
) != type
)
8282 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8287 /* Create and return a pointer to data member type. */
8290 build_ptrmem_type (tree class_type
, tree member_type
)
8292 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8294 cp_cv_quals quals
= type_memfn_quals (member_type
);
8295 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8296 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8297 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8301 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8302 return build_offset_type (class_type
, member_type
);
8306 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8307 Check to see that the definition is valid. Issue appropriate error
8308 messages. Return 1 if the definition is particularly bad, or 0
8312 check_static_variable_definition (tree decl
, tree type
)
8314 /* Can't check yet if we don't know the type. */
8315 if (dependent_type_p (type
))
8317 /* If DECL is declared constexpr, we'll do the appropriate checks
8318 in check_initializer. */
8319 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8321 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8323 if (!COMPLETE_TYPE_P (type
))
8324 error ("in-class initialization of static data member %q#D of "
8325 "incomplete type", decl
);
8326 else if (literal_type_p (type
))
8327 permerror (input_location
,
8328 "%<constexpr%> needed for in-class initialization of "
8329 "static data member %q#D of non-integral type", decl
);
8331 error ("in-class initialization of static data member %q#D of "
8332 "non-literal type", decl
);
8336 /* Motion 10 at San Diego: If a static const integral data member is
8337 initialized with an integral constant expression, the initializer
8338 may appear either in the declaration (within the class), or in
8339 the definition, but not both. If it appears in the class, the
8340 member is a member constant. The file-scope definition is always
8342 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8344 error ("invalid in-class initialization of static data member "
8345 "of non-integral type %qT",
8349 else if (!CP_TYPE_CONST_P (type
))
8350 error ("ISO C++ forbids in-class initialization of non-const "
8351 "static member %qD",
8353 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8354 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8355 "%qD of non-integral type %qT", decl
, type
);
8360 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8361 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8362 expressions out into temporary variables so that walk_tree doesn't
8363 step into them (c++/15764). */
8366 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8368 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8369 tree expr
= *expr_p
;
8370 if (TREE_CODE (expr
) == SAVE_EXPR
)
8372 tree op
= TREE_OPERAND (expr
, 0);
8373 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8374 if (TREE_SIDE_EFFECTS (op
))
8375 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8378 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8383 /* Entry point for the above. */
8386 stabilize_vla_size (tree size
)
8388 hash_set
<tree
> pset
;
8389 /* Break out any function calls into temporary variables. */
8390 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8393 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8394 not inside of SAVE_EXPR and fold them. */
8397 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8399 tree expr
= *expr_p
;
8400 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8402 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8404 *(bool *)data
= true;
8405 if (SIZEOF_EXPR_TYPE_P (expr
))
8406 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8407 SIZEOF_EXPR
, false);
8408 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8409 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8412 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8414 if (expr
== error_mark_node
)
8415 expr
= size_one_node
;
8422 /* Given the SIZE (i.e., number of elements) in an array, compute an
8423 appropriate index type for the array. If non-NULL, NAME is the
8424 name of the thing being declared. */
8427 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8432 if (error_operand_p (size
))
8433 return error_mark_node
;
8435 if (!type_dependent_expression_p (size
))
8437 tree type
= TREE_TYPE (size
);
8439 mark_rvalue_use (size
);
8441 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8442 && TREE_SIDE_EFFECTS (size
))
8443 /* In C++98, we mark a non-constant array bound with a magic
8444 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8447 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8449 if (CLASS_TYPE_P (type
)
8450 && CLASSTYPE_LITERAL_P (type
))
8452 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8455 if (!(complain
& tf_error
))
8456 return error_mark_node
;
8458 error ("size of array %qD has non-integral type %qT",
8461 error ("size of array has non-integral type %qT", type
);
8462 size
= integer_one_node
;
8464 if (size
== error_mark_node
)
8465 return error_mark_node
;
8466 type
= TREE_TYPE (size
);
8469 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8470 size
= maybe_constant_value (size
);
8472 if (!TREE_CONSTANT (size
))
8476 if (error_operand_p (size
))
8477 return error_mark_node
;
8479 /* The array bound must be an integer type. */
8480 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8482 if (!(complain
& tf_error
))
8483 return error_mark_node
;
8485 error ("size of array %qD has non-integral type %qT", name
, type
);
8487 error ("size of array has non-integral type %qT", type
);
8488 size
= integer_one_node
;
8489 type
= TREE_TYPE (size
);
8493 /* A type is dependent if it is...an array type constructed from any
8494 dependent type or whose size is specified by a constant expression
8495 that is value-dependent. */
8496 /* We can only call value_dependent_expression_p on integral constant
8497 expressions; treat non-constant expressions as dependent, too. */
8498 if (processing_template_decl
8499 && (type_dependent_expression_p (size
)
8500 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8502 /* We cannot do any checking for a SIZE that isn't known to be
8503 constant. Just build the index type and mark that it requires
8504 structural equality checks. */
8505 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8506 size
, size_one_node
));
8507 TYPE_DEPENDENT_P (itype
) = 1;
8508 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8509 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8513 /* Normally, the array-bound will be a constant. */
8514 if (TREE_CODE (size
) == INTEGER_CST
)
8516 /* Check to see if the array bound overflowed. Make that an
8517 error, no matter how generous we're being. */
8518 constant_expression_error (size
);
8520 /* An array must have a positive number of elements. */
8521 if (tree_int_cst_lt (size
, integer_zero_node
))
8523 if (!(complain
& tf_error
))
8524 return error_mark_node
;
8526 error ("size of array %qD is negative", name
);
8528 error ("size of array is negative");
8529 size
= integer_one_node
;
8531 /* As an extension we allow zero-sized arrays. */
8532 else if (integer_zerop (size
))
8534 if (!(complain
& tf_error
))
8535 /* We must fail if performing argument deduction (as
8536 indicated by the state of complain), so that
8537 another substitution can be found. */
8538 return error_mark_node
;
8539 else if (in_system_header_at (input_location
))
8540 /* Allow them in system headers because glibc uses them. */;
8542 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8544 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8547 else if (TREE_CONSTANT (size
)
8548 /* We don't allow VLAs at non-function scopes, or during
8549 tentative template substitution. */
8550 || !at_function_scope_p ()
8551 || !(complain
& tf_error
))
8553 if (!(complain
& tf_error
))
8554 return error_mark_node
;
8555 /* `(int) &fn' is not a valid array bound. */
8557 error ("size of array %qD is not an integral constant-expression",
8560 error ("size of array is not an integral constant-expression");
8561 size
= integer_one_node
;
8563 else if (pedantic
&& warn_vla
!= 0)
8566 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8568 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8570 else if (warn_vla
> 0)
8574 "variable length array %qD is used", name
);
8577 "variable length array is used");
8580 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8581 /* A variable sized array. */
8582 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8585 HOST_WIDE_INT saved_processing_template_decl
;
8587 /* Compute the index of the largest element in the array. It is
8588 one less than the number of elements in the array. We save
8589 and restore PROCESSING_TEMPLATE_DECL so that computations in
8590 cp_build_binary_op will be appropriately folded. */
8591 saved_processing_template_decl
= processing_template_decl
;
8592 processing_template_decl
= 0;
8593 itype
= cp_build_binary_op (input_location
,
8595 cp_convert (ssizetype
, size
, complain
),
8596 cp_convert (ssizetype
, integer_one_node
,
8599 itype
= fold (itype
);
8600 processing_template_decl
= saved_processing_template_decl
;
8602 if (!TREE_CONSTANT (itype
))
8604 /* A variable sized array. */
8605 itype
= variable_size (itype
);
8607 if (TREE_CODE (itype
) != SAVE_EXPR
)
8609 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8610 they might survive till gimplification. */
8611 tree newitype
= itype
;
8613 cp_walk_tree_without_duplicates (&newitype
,
8614 fold_sizeof_expr_r
, &found
);
8616 itype
= variable_size (fold (newitype
));
8619 stabilize_vla_size (itype
);
8621 if (flag_sanitize
& SANITIZE_VLA
8622 && do_ubsan_in_current_function ())
8624 /* We have to add 1 -- in the ubsan routine we generate
8625 LE_EXPR rather than LT_EXPR. */
8626 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8627 build_one_cst (TREE_TYPE (itype
)));
8628 t
= ubsan_instrument_vla (input_location
, t
);
8629 finish_expr_stmt (t
);
8632 /* Make sure that there was no overflow when creating to a signed
8633 index type. (For example, on a 32-bit machine, an array with
8634 size 2^32 - 1 is too big.) */
8635 else if (TREE_CODE (itype
) == INTEGER_CST
8636 && TREE_OVERFLOW (itype
))
8638 if (!(complain
& tf_error
))
8639 return error_mark_node
;
8640 error ("overflow in array dimension");
8641 TREE_OVERFLOW (itype
) = 0;
8645 /* Create and return the appropriate index type. */
8646 itype
= build_index_type (itype
);
8648 /* If the index type were dependent, we would have returned early, so
8649 remember that it isn't. */
8650 TYPE_DEPENDENT_P (itype
) = 0;
8651 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8655 /* Returns the scope (if any) in which the entity declared by
8656 DECLARATOR will be located. If the entity was declared with an
8657 unqualified name, NULL_TREE is returned. */
8660 get_scope_of_declarator (const cp_declarator
*declarator
)
8662 while (declarator
&& declarator
->kind
!= cdk_id
)
8663 declarator
= declarator
->declarator
;
8665 /* If the declarator-id is a SCOPE_REF, the scope in which the
8666 declaration occurs is the first operand. */
8668 && declarator
->u
.id
.qualifying_scope
)
8669 return declarator
->u
.id
.qualifying_scope
;
8671 /* Otherwise, the declarator is not a qualified name; the entity will
8672 be declared in the current scope. */
8676 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8677 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8681 create_array_type_for_decl (tree name
, tree type
, tree size
)
8683 tree itype
= NULL_TREE
;
8685 /* If things have already gone awry, bail now. */
8686 if (type
== error_mark_node
|| size
== error_mark_node
)
8687 return error_mark_node
;
8689 /* 8.3.4/1: If the type of the identifier of D contains the auto
8690 type-specifier, the program is ill-formed. */
8691 if (type_uses_auto (type
))
8693 error ("%qD declared as array of %qT", name
, type
);
8694 return error_mark_node
;
8697 /* If there are some types which cannot be array elements,
8698 issue an error-message and return. */
8699 switch (TREE_CODE (type
))
8703 error ("declaration of %qD as array of void", name
);
8705 error ("creating array of void");
8706 return error_mark_node
;
8710 error ("declaration of %qD as array of functions", name
);
8712 error ("creating array of functions");
8713 return error_mark_node
;
8715 case REFERENCE_TYPE
:
8717 error ("declaration of %qD as array of references", name
);
8719 error ("creating array of references");
8720 return error_mark_node
;
8724 error ("declaration of %qD as array of function members", name
);
8726 error ("creating array of function members");
8727 return error_mark_node
;
8735 The constant expressions that specify the bounds of the arrays
8736 can be omitted only for the first member of the sequence. */
8737 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8740 error ("declaration of %qD as multidimensional array must "
8741 "have bounds for all dimensions except the first",
8744 error ("multidimensional array must have bounds for all "
8745 "dimensions except the first");
8747 return error_mark_node
;
8750 /* Figure out the index type for the array. */
8752 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8755 T is called the array element type; this type shall not be [...] an
8756 abstract class type. */
8757 abstract_virtuals_error (name
, type
);
8759 return build_cplus_array_type (type
, itype
);
8762 /* Check that it's OK to declare a function with the indicated TYPE.
8763 SFK indicates the kind of special function (if any) that this
8764 function is. OPTYPE is the type given in a conversion operator
8765 declaration, or the class type for a constructor/destructor.
8766 Returns the actual return type of the function; that
8767 may be different than TYPE if an error occurs, or for certain
8768 special functions. */
8771 check_special_function_return_type (special_function_kind sfk
,
8777 case sfk_constructor
:
8779 error ("return type specification for constructor invalid");
8781 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8782 type
= build_pointer_type (optype
);
8784 type
= void_type_node
;
8787 case sfk_destructor
:
8789 error ("return type specification for destructor invalid");
8790 /* We can't use the proper return type here because we run into
8791 problems with ambiguous bases and covariant returns.
8792 Java classes are left unchanged because (void *) isn't a valid
8793 Java type, and we don't want to change the Java ABI. */
8794 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8795 type
= build_pointer_type (void_type_node
);
8797 type
= void_type_node
;
8800 case sfk_conversion
:
8802 error ("return type specified for %<operator %T%>", optype
);
8813 /* A variable or data member (whose unqualified name is IDENTIFIER)
8814 has been declared with the indicated TYPE. If the TYPE is not
8815 acceptable, issue an error message and return a type to use for
8816 error-recovery purposes. */
8819 check_var_type (tree identifier
, tree type
)
8821 if (VOID_TYPE_P (type
))
8824 error ("unnamed variable or field declared void");
8825 else if (identifier_p (identifier
))
8827 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8828 error ("variable or field %qE declared void", identifier
);
8831 error ("variable or field declared void");
8832 type
= error_mark_node
;
8838 /* Given declspecs and a declarator (abstract or otherwise), determine
8839 the name and type of the object declared and construct a DECL node
8842 DECLSPECS points to the representation of declaration-specifier
8843 sequence that precedes declarator.
8845 DECL_CONTEXT says which syntactic context this declaration is in:
8846 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8847 FUNCDEF for a function definition. Like NORMAL but a few different
8848 error messages in each case. Return value may be zero meaning
8849 this definition is too screwy to try to parse.
8850 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8851 handle member functions (which have FIELD context).
8852 Return value may be zero meaning this definition is too screwy to
8854 PARM for a parameter declaration (either within a function prototype
8855 or before a function body). Make a PARM_DECL, or return void_type_node.
8856 TPARM for a template parameter declaration.
8857 CATCHPARM for a parameter declaration before a catch clause.
8858 TYPENAME if for a typename (in a cast or sizeof).
8859 Don't make a DECL node; just return the ..._TYPE node.
8860 FIELD for a struct or union field; make a FIELD_DECL.
8861 BITFIELD for a field with specified width.
8863 INITIALIZED is as for start_decl.
8865 ATTRLIST is a pointer to the list of attributes, which may be NULL
8866 if there are none; *ATTRLIST may be modified if attributes from inside
8867 the declarator should be applied to the declaration.
8869 When this function is called, scoping variables (such as
8870 CURRENT_CLASS_TYPE) should reflect the scope in which the
8871 declaration occurs, not the scope in which the new declaration will
8872 be placed. For example, on:
8876 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8879 Returns a DECL (if a declarator is present), a TYPE (if there is no
8880 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8884 grokdeclarator (const cp_declarator
*declarator
,
8885 cp_decl_specifier_seq
*declspecs
,
8886 enum decl_context decl_context
,
8890 tree type
= NULL_TREE
;
8892 int explicit_intN
= 0;
8893 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8894 int explicit_int
= 0;
8895 int explicit_char
= 0;
8896 int defaulted_int
= 0;
8898 tree typedef_decl
= NULL_TREE
;
8899 const char *name
= NULL
;
8900 tree typedef_type
= NULL_TREE
;
8901 /* True if this declarator is a function definition. */
8902 bool funcdef_flag
= false;
8903 cp_declarator_kind innermost_code
= cdk_error
;
8906 /* See the code below that used this. */
8907 tree decl_attr
= NULL_TREE
;
8910 /* Keep track of what sort of function is being processed
8911 so that we can warn about default return values, or explicit
8912 return values which do not match prescribed defaults. */
8913 special_function_kind sfk
= sfk_none
;
8915 tree dname
= NULL_TREE
;
8916 tree ctor_return_type
= NULL_TREE
;
8917 enum overload_flags flags
= NO_SPECIAL
;
8918 /* cv-qualifiers that apply to the declarator, for a declaration of
8919 a member function. */
8920 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8921 /* virt-specifiers that apply to the declarator, for a declaration of
8922 a member function. */
8923 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8924 /* ref-qualifier that applies to the declarator, for a declaration of
8925 a member function. */
8926 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8927 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8929 tree raises
= NULL_TREE
;
8930 int template_count
= 0;
8931 tree returned_attrs
= NULL_TREE
;
8932 tree parms
= NULL_TREE
;
8933 const cp_declarator
*id_declarator
;
8934 /* The unqualified name of the declarator; either an
8935 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8936 tree unqualified_id
;
8937 /* The class type, if any, in which this entity is located,
8938 or NULL_TREE if none. Note that this value may be different from
8939 the current class type; for example if an attempt is made to declare
8940 "A::f" inside "B", this value will be "A". */
8941 tree ctype
= current_class_type
;
8942 /* The NAMESPACE_DECL for the namespace in which this entity is
8943 located. If an unqualified name is used to declare the entity,
8944 this value will be NULL_TREE, even if the entity is located at
8946 tree in_namespace
= NULL_TREE
;
8947 cp_storage_class storage_class
;
8948 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8949 bool type_was_error_mark_node
= false;
8950 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8951 bool template_type_arg
= false;
8952 bool template_parm_flag
= false;
8953 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8954 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8955 bool late_return_type_p
= false;
8956 bool array_parameter_p
= false;
8957 source_location saved_loc
= input_location
;
8960 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8961 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8962 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8963 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8964 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8965 explicit_intN
= declspecs
->explicit_intN_p
;
8966 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8968 if (decl_context
== FUNCDEF
)
8969 funcdef_flag
= true, decl_context
= NORMAL
;
8970 else if (decl_context
== MEMFUNCDEF
)
8971 funcdef_flag
= true, decl_context
= FIELD
;
8972 else if (decl_context
== BITFIELD
)
8973 bitfield
= 1, decl_context
= FIELD
;
8974 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8975 template_type_arg
= true, decl_context
= TYPENAME
;
8976 else if (decl_context
== TPARM
)
8977 template_parm_flag
= true, decl_context
= PARM
;
8979 if (initialized
> 1)
8980 funcdef_flag
= true;
8982 /* Look inside a declarator for the name being declared
8983 and get it as a string, for an error message. */
8984 for (id_declarator
= declarator
;
8986 id_declarator
= id_declarator
->declarator
)
8988 if (id_declarator
->kind
!= cdk_id
)
8989 innermost_code
= id_declarator
->kind
;
8991 switch (id_declarator
->kind
)
8994 if (id_declarator
->declarator
8995 && id_declarator
->declarator
->kind
== cdk_id
)
8997 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8998 if (sfk
== sfk_destructor
)
9005 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
9006 tree decl
= id_declarator
->u
.id
.unqualified_name
;
9009 if (qualifying_scope
)
9011 if (at_function_scope_p ())
9015 A declarator-id shall not be qualified except
9018 None of the cases are permitted in block
9020 if (qualifying_scope
== global_namespace
)
9021 error ("invalid use of qualified-name %<::%D%>",
9023 else if (TYPE_P (qualifying_scope
))
9024 error ("invalid use of qualified-name %<%T::%D%>",
9025 qualifying_scope
, decl
);
9027 error ("invalid use of qualified-name %<%D::%D%>",
9028 qualifying_scope
, decl
);
9029 return error_mark_node
;
9031 else if (TYPE_P (qualifying_scope
))
9033 ctype
= qualifying_scope
;
9034 if (!MAYBE_CLASS_TYPE_P (ctype
))
9036 error ("%q#T is not a class or a namespace", ctype
);
9039 else if (innermost_code
!= cdk_function
9040 && current_class_type
9041 && !uniquely_derived_from_p (ctype
,
9042 current_class_type
))
9044 error ("invalid use of qualified-name %<%T::%D%>",
9045 qualifying_scope
, decl
);
9046 return error_mark_node
;
9049 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9050 in_namespace
= qualifying_scope
;
9052 switch (TREE_CODE (decl
))
9058 if (innermost_code
!= cdk_function
)
9060 error ("declaration of %qD as non-function", decl
);
9061 return error_mark_node
;
9063 else if (!qualifying_scope
9064 && !(current_class_type
&& at_class_scope_p ()))
9066 error ("declaration of %qD as non-member", decl
);
9067 return error_mark_node
;
9070 type
= TREE_OPERAND (decl
, 0);
9072 type
= constructor_name (type
);
9073 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9078 case TEMPLATE_ID_EXPR
:
9080 tree fns
= TREE_OPERAND (decl
, 0);
9083 if (!identifier_p (dname
))
9085 if (variable_template_p (dname
))
9086 dname
= DECL_NAME (dname
);
9089 gcc_assert (is_overloaded_fn (dname
));
9090 dname
= DECL_NAME (get_first_fn (dname
));
9096 case IDENTIFIER_NODE
:
9097 if (identifier_p (decl
))
9100 if (C_IS_RESERVED_WORD (dname
))
9102 error ("declarator-id missing; using reserved word %qD",
9104 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9106 else if (!IDENTIFIER_TYPENAME_P (dname
))
9107 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9110 gcc_assert (flags
== NO_SPECIAL
);
9111 flags
= TYPENAME_FLAG
;
9112 ctor_return_type
= TREE_TYPE (dname
);
9113 sfk
= sfk_conversion
;
9114 if (is_typename_at_global_scope (dname
))
9115 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9117 name
= "<invalid operator>";
9134 return error_mark_node
;
9139 if (id_declarator
->kind
== cdk_id
)
9145 The declarator in a function-definition shall have the form
9146 D1 ( parameter-declaration-clause) ... */
9147 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9149 error ("function definition does not declare parameters");
9150 return error_mark_node
;
9153 if (flags
== TYPENAME_FLAG
9154 && innermost_code
!= cdk_function
9155 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9157 error ("declaration of %qD as non-function", dname
);
9158 return error_mark_node
;
9162 && identifier_p (dname
)
9163 && UDLIT_OPER_P (dname
)
9164 && innermost_code
!= cdk_function
)
9166 error ("declaration of %qD as non-function", dname
);
9167 return error_mark_node
;
9170 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9174 error ("declaration of %qD as %<typedef%>", dname
);
9175 return error_mark_node
;
9177 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9179 error ("declaration of %qD as parameter", dname
);
9180 return error_mark_node
;
9184 /* Anything declared one level down from the top level
9185 must be one of the parameters of a function
9186 (because the body is at least two levels down). */
9188 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9189 by not allowing C++ class definitions to specify their parameters
9190 with xdecls (must be spec.d in the parmlist).
9192 Since we now wait to push a class scope until we are sure that
9193 we are in a legitimate method context, we must set oldcname
9194 explicitly (since current_class_name is not yet alive).
9196 We also want to avoid calling this a PARM if it is in a namespace. */
9198 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9200 cp_binding_level
*b
= current_binding_level
;
9201 current_binding_level
= b
->level_chain
;
9202 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9203 decl_context
= PARM
;
9204 current_binding_level
= b
;
9208 name
= decl_context
== PARM
? "parameter" : "type name";
9210 if (constexpr_p
&& typedef_p
)
9212 error ("%<constexpr%> cannot appear in a typedef declaration");
9213 return error_mark_node
;
9216 /* If there were multiple types specified in the decl-specifier-seq,
9217 issue an error message. */
9218 if (declspecs
->multiple_types_p
)
9220 error ("two or more data types in declaration of %qs", name
);
9221 return error_mark_node
;
9224 if (declspecs
->conflicting_specifiers_p
)
9226 error ("conflicting specifiers in declaration of %qs", name
);
9227 return error_mark_node
;
9230 /* Extract the basic type from the decl-specifier-seq. */
9231 type
= declspecs
->type
;
9232 if (type
== error_mark_node
)
9235 type_was_error_mark_node
= true;
9237 /* If the entire declaration is itself tagged as deprecated then
9238 suppress reports of deprecated items. */
9239 if (type
&& TREE_DEPRECATED (type
)
9240 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9241 warn_deprecated_use (type
, NULL_TREE
);
9242 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9244 typedef_decl
= type
;
9245 type
= TREE_TYPE (typedef_decl
);
9246 if (TREE_DEPRECATED (type
)
9247 && DECL_ARTIFICIAL (typedef_decl
)
9248 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9249 warn_deprecated_use (type
, NULL_TREE
);
9251 /* No type at all: default to `int', and set DEFAULTED_INT
9252 because it was not a user-defined typedef. */
9253 if (type
== NULL_TREE
)
9255 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9257 /* These imply 'int'. */
9258 type
= integer_type_node
;
9261 /* If we just have "complex", it is equivalent to "complex double". */
9262 else if (!longlong
&& !explicit_intN
9263 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9265 type
= double_type_node
;
9266 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9267 "ISO C++ does not support plain %<complex%> meaning "
9268 "%<double complex%>");
9272 explicit_int
= declspecs
->explicit_int_p
;
9273 explicit_char
= declspecs
->explicit_char_p
;
9276 /* See the code below that used this. */
9278 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9280 typedef_type
= type
;
9283 if (sfk
!= sfk_conversion
)
9284 ctor_return_type
= ctype
;
9286 if (sfk
!= sfk_none
)
9287 type
= check_special_function_return_type (sfk
, type
,
9289 else if (type
== NULL_TREE
)
9295 /* We handle `main' specially here, because 'main () { }' is so
9296 common. With no options, it is allowed. With -Wreturn-type,
9297 it is a warning. It is only an error with -pedantic-errors. */
9298 is_main
= (funcdef_flag
9299 && dname
&& identifier_p (dname
)
9300 && MAIN_NAME_P (dname
)
9301 && ctype
== NULL_TREE
9302 && in_namespace
== NULL_TREE
9303 && current_namespace
== global_namespace
);
9305 if (type_was_error_mark_node
)
9306 /* We've already issued an error, don't complain more. */;
9307 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9308 /* Allow it, sigh. */;
9310 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9312 pedwarn (input_location
, OPT_Wpedantic
,
9313 "ISO C++ forbids declaration of %qs with no type", name
);
9315 warning (OPT_Wreturn_type
,
9316 "ISO C++ forbids declaration of %qs with no type", name
);
9318 type
= integer_type_node
;
9325 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9327 error ("%<__int%d%> is not supported by this target",
9328 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9329 explicit_intN
= false;
9331 else if (pedantic
&& ! in_system_header_at (input_location
))
9332 pedwarn (input_location
, OPT_Wpedantic
,
9333 "ISO C++ does not support %<__int%d%> for %qs",
9334 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9337 /* Now process the modifiers that were specified
9338 and check for invalid combinations. */
9340 /* Long double is a special combination. */
9341 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9344 type
= cp_build_qualified_type (long_double_type_node
,
9345 cp_type_quals (type
));
9348 /* Check all other uses of type modifiers. */
9350 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9354 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9355 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9356 else if (signed_p
&& unsigned_p
)
9357 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9358 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9359 error ("%<long long%> invalid for %qs", name
);
9360 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9361 error ("%<long%> invalid for %qs", name
);
9362 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9363 error ("%<short%> invalid for %qs", name
);
9364 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9365 error ("%<long%> or %<short%> invalid for %qs", name
);
9366 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9367 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9368 else if ((long_p
|| short_p
) && explicit_char
)
9369 error ("%<long%> or %<short%> specified with char for %qs", name
);
9370 else if (long_p
&& short_p
)
9371 error ("%<long%> and %<short%> specified together for %qs", name
);
9372 else if (type
== char16_type_node
|| type
== char32_type_node
)
9374 if (signed_p
|| unsigned_p
)
9375 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9376 else if (short_p
|| long_p
)
9377 error ("%<short%> or %<long%> invalid for %qs", name
);
9382 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9384 pedwarn (input_location
, OPT_Wpedantic
,
9385 "long, short, signed or unsigned used invalidly for %qs",
9387 if (flag_pedantic_errors
)
9392 /* Discard the type modifiers if they are invalid. */
9403 /* Decide whether an integer type is signed or not.
9404 Optionally treat bitfields as signed by default. */
9408 It is implementation-defined whether a plain (neither
9409 explicitly signed or unsigned) char, short, int, or long
9410 bit-field is signed or unsigned.
9412 Naturally, we extend this to long long as well. Note that
9413 this does not include wchar_t. */
9414 || (bitfield
&& !flag_signed_bitfields
9416 /* A typedef for plain `int' without `signed' can be
9417 controlled just like plain `int', but a typedef for
9418 `signed int' cannot be so controlled. */
9420 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9421 && TREE_CODE (type
) == INTEGER_TYPE
9422 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9425 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9427 type
= long_long_unsigned_type_node
;
9429 type
= long_unsigned_type_node
;
9431 type
= short_unsigned_type_node
;
9432 else if (type
== char_type_node
)
9433 type
= unsigned_char_type_node
;
9434 else if (typedef_decl
)
9435 type
= unsigned_type_for (type
);
9437 type
= unsigned_type_node
;
9439 else if (signed_p
&& type
== char_type_node
)
9440 type
= signed_char_type_node
;
9441 else if (explicit_intN
)
9442 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9444 type
= long_long_integer_type_node
;
9446 type
= long_integer_type_node
;
9448 type
= short_integer_type_node
;
9450 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9452 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9453 error ("complex invalid for %qs", name
);
9454 /* If a modifier is specified, the resulting complex is the complex
9455 form of TYPE. E.g, "complex short" is "complex short int". */
9456 else if (type
== integer_type_node
)
9457 type
= complex_integer_type_node
;
9458 else if (type
== float_type_node
)
9459 type
= complex_float_type_node
;
9460 else if (type
== double_type_node
)
9461 type
= complex_double_type_node
;
9462 else if (type
== long_double_type_node
)
9463 type
= complex_long_double_type_node
;
9465 type
= build_complex_type (type
);
9468 type_quals
= TYPE_UNQUALIFIED
;
9469 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9470 type_quals
|= TYPE_QUAL_CONST
;
9471 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9472 type_quals
|= TYPE_QUAL_VOLATILE
;
9473 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9474 type_quals
|= TYPE_QUAL_RESTRICT
;
9475 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9476 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9479 /* If we're using the injected-class-name to form a compound type or a
9480 declaration, replace it with the underlying class so we don't get
9481 redundant typedefs in the debug output. But if we are returning the
9482 type unchanged, leave it alone so that it's available to
9483 maybe_get_template_decl_from_type_decl. */
9484 if (CLASS_TYPE_P (type
)
9485 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9486 && type
== TREE_TYPE (TYPE_NAME (type
))
9487 && (declarator
|| type_quals
))
9488 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9490 type_quals
|= cp_type_quals (type
);
9491 type
= cp_build_qualified_type_real
9492 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9493 || declspecs
->decltype_p
)
9494 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9495 /* We might have ignored or rejected some of the qualifiers. */
9496 type_quals
= cp_type_quals (type
);
9499 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9500 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9501 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9503 storage_class
= declspecs
->storage_class
;
9504 if (storage_class
== sc_static
)
9505 staticp
= 1 + (decl_context
== FIELD
);
9507 if (virtualp
&& staticp
== 2)
9509 error ("member %qD cannot be declared both virtual and static", dname
);
9510 storage_class
= sc_none
;
9513 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9515 /* Issue errors about use of storage classes for parameters. */
9516 if (decl_context
== PARM
)
9520 error ("typedef declaration invalid in parameter declaration");
9521 return error_mark_node
;
9523 else if (template_parm_flag
&& storage_class
!= sc_none
)
9525 error ("storage class specified for template parameter %qs", name
);
9526 return error_mark_node
;
9528 else if (storage_class
== sc_static
9529 || storage_class
== sc_extern
9531 error ("storage class specifiers invalid in parameter declarations");
9533 /* Function parameters cannot be constexpr. If we saw one, moan
9534 and pretend it wasn't there. */
9537 error ("a parameter cannot be declared %<constexpr%>");
9542 /* Give error if `virtual' is used outside of class declaration. */
9544 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9546 error_at (declspecs
->locations
[ds_virtual
],
9547 "%<virtual%> outside class declaration");
9551 /* Static anonymous unions are dealt with here. */
9552 if (staticp
&& decl_context
== TYPENAME
9554 && ANON_AGGR_TYPE_P (declspecs
->type
))
9555 decl_context
= FIELD
;
9557 /* Warn about storage classes that are invalid for certain
9558 kinds of declarations (parameters, typenames, etc.). */
9561 && storage_class
!= sc_extern
9562 && storage_class
!= sc_static
)
9565 error ("multiple storage classes in declaration of %qs", name
);
9568 if (decl_context
!= NORMAL
9569 && ((storage_class
!= sc_none
9570 && storage_class
!= sc_mutable
)
9573 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9574 && (storage_class
== sc_register
9575 || storage_class
== sc_auto
))
9579 else if (decl_context
== FIELD
9580 /* C++ allows static class elements. */
9581 && storage_class
== sc_static
)
9582 /* C++ also allows inlines and signed and unsigned elements,
9583 but in those cases we don't come in here. */
9587 if (decl_context
== FIELD
)
9588 error ("storage class specified for %qs", name
);
9591 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9592 error ("storage class specified for parameter %qs", name
);
9594 error ("storage class specified for typename");
9596 if (storage_class
== sc_register
9597 || storage_class
== sc_auto
9598 || storage_class
== sc_extern
9600 storage_class
= sc_none
;
9603 else if (storage_class
== sc_extern
&& funcdef_flag
9604 && ! toplevel_bindings_p ())
9605 error ("nested function %qs declared %<extern%>", name
);
9606 else if (toplevel_bindings_p ())
9608 if (storage_class
== sc_auto
)
9609 error ("top-level declaration of %qs specifies %<auto%>", name
);
9612 && storage_class
!= sc_extern
9613 && storage_class
!= sc_static
)
9615 if (declspecs
->gnu_thread_keyword_p
)
9616 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9617 "declared %<__thread%>", name
);
9619 /* When thread_local is applied to a variable of block scope the
9620 storage-class-specifier static is implied if it does not appear
9622 storage_class
= declspecs
->storage_class
= sc_static
;
9626 if (storage_class
&& friendp
)
9628 error ("storage class specifiers invalid in friend function declarations");
9629 storage_class
= sc_none
;
9634 unqualified_id
= NULL_TREE
;
9637 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9638 switch (TREE_CODE (unqualified_id
))
9641 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9642 if (TYPE_P (unqualified_id
))
9643 unqualified_id
= constructor_name (unqualified_id
);
9646 case IDENTIFIER_NODE
:
9647 case TEMPLATE_ID_EXPR
:
9655 if (declspecs
->std_attributes
)
9657 /* Apply the c++11 attributes to the type preceding them. */
9658 input_location
= declspecs
->locations
[ds_std_attribute
];
9659 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9660 input_location
= saved_loc
;
9663 /* Determine the type of the entity declared by recurring on the
9665 for (; declarator
; declarator
= declarator
->declarator
)
9667 const cp_declarator
*inner_declarator
;
9670 if (type
== error_mark_node
)
9671 return error_mark_node
;
9673 attrs
= declarator
->attributes
;
9679 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9680 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9681 if (declarator
->kind
== cdk_function
)
9682 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9683 if (declarator
->kind
== cdk_array
)
9684 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9685 returned_attrs
= decl_attributes (&type
,
9686 chainon (returned_attrs
, attrs
),
9690 if (declarator
->kind
== cdk_id
)
9693 inner_declarator
= declarator
->declarator
;
9695 switch (declarator
->kind
)
9698 type
= create_array_type_for_decl (dname
, type
,
9699 declarator
->u
.array
.bounds
);
9700 if (declarator
->std_attributes
)
9703 The optional attribute-specifier-seq appertains to the
9705 returned_attrs
= chainon (returned_attrs
,
9706 declarator
->std_attributes
);
9714 /* Declaring a function type.
9715 Make sure we have a valid type for the function to return. */
9717 if (type_quals
!= TYPE_UNQUALIFIED
)
9719 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9720 warning (OPT_Wignored_qualifiers
,
9721 "type qualifiers ignored on function return type");
9722 /* We now know that the TYPE_QUALS don't apply to the
9723 decl, but to its return type. */
9724 type_quals
= TYPE_UNQUALIFIED
;
9726 errmsg
= targetm
.invalid_return_type (type
);
9730 type
= integer_type_node
;
9733 /* Error about some types functions can't return. */
9735 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9737 error ("%qs declared as function returning a function", name
);
9738 return error_mark_node
;
9740 if (TREE_CODE (type
) == ARRAY_TYPE
)
9742 error ("%qs declared as function returning an array", name
);
9743 return error_mark_node
;
9746 input_location
= declspecs
->locations
[ds_type_spec
];
9747 abstract_virtuals_error (ACU_RETURN
, type
);
9748 input_location
= saved_loc
;
9750 /* Pick up type qualifiers which should be applied to `this'. */
9751 memfn_quals
= declarator
->u
.function
.qualifiers
;
9752 /* Pick up virt-specifiers. */
9753 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9754 /* And ref-qualifier, too */
9755 rqual
= declarator
->u
.function
.ref_qualifier
;
9756 /* Pick up the exception specifications. */
9757 raises
= declarator
->u
.function
.exception_specification
;
9758 /* If the exception-specification is ill-formed, let's pretend
9759 there wasn't one. */
9760 if (raises
== error_mark_node
)
9763 /* Say it's a definition only for the CALL_EXPR
9764 closest to the identifier. */
9765 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9767 /* Handle a late-specified return type. */
9770 if (type_uses_auto (type
))
9772 if (!declarator
->u
.function
.late_return_type
)
9774 if (current_class_type
9775 && LAMBDA_TYPE_P (current_class_type
))
9776 /* OK for C++11 lambdas. */;
9777 else if (cxx_dialect
< cxx14
)
9779 error ("%qs function uses "
9780 "%<auto%> type specifier without trailing "
9781 "return type", name
);
9782 inform (input_location
, "deduced return type "
9783 "only available with -std=c++14 or "
9788 error ("virtual function cannot "
9789 "have deduced return type");
9793 else if (!is_auto (type
) && sfk
!= sfk_conversion
)
9795 error ("%qs function with trailing return type has"
9796 " %qT as its type rather than plain %<auto%>",
9798 return error_mark_node
;
9801 else if (declarator
->u
.function
.late_return_type
9802 && sfk
!= sfk_conversion
)
9804 if (cxx_dialect
< cxx11
)
9805 /* Not using maybe_warn_cpp0x because this should
9806 always be an error. */
9807 error ("trailing return type only available with "
9808 "-std=c++11 or -std=gnu++11");
9810 error ("%qs function with trailing return type not "
9811 "declared with %<auto%> type specifier", name
);
9812 return error_mark_node
;
9815 type
= splice_late_return_type
9816 (type
, declarator
->u
.function
.late_return_type
);
9817 if (type
== error_mark_node
)
9818 return error_mark_node
;
9820 if (declarator
->u
.function
.late_return_type
)
9821 late_return_type_p
= true;
9823 if (ctype
== NULL_TREE
9824 && decl_context
== FIELD
9827 ctype
= current_class_type
;
9829 if (ctype
&& (sfk
== sfk_constructor
9830 || sfk
== sfk_destructor
))
9832 /* We are within a class's scope. If our declarator name
9833 is the same as the class name, and we are defining
9834 a function, then it is a constructor/destructor, and
9835 therefore returns a void type. */
9837 /* ISO C++ 12.4/2. A destructor may not be declared
9838 const or volatile. A destructor may not be static.
9839 A destructor may not be declared with ref-qualifier.
9841 ISO C++ 12.1. A constructor may not be declared
9842 const or volatile. A constructor may not be
9843 virtual. A constructor may not be static.
9844 A constructor may not be declared with ref-qualifier. */
9846 error ((flags
== DTOR_FLAG
)
9847 ? G_("destructor cannot be static member function")
9848 : G_("constructor cannot be static member function"));
9851 error ((flags
== DTOR_FLAG
)
9852 ? G_("destructors may not be cv-qualified")
9853 : G_("constructors may not be cv-qualified"));
9854 memfn_quals
= TYPE_UNQUALIFIED
;
9859 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9860 error ((flags
== DTOR_FLAG
)
9861 ? "destructors may not be ref-qualified"
9862 : "constructors may not be ref-qualified");
9863 rqual
= REF_QUAL_NONE
;
9866 if (decl_context
== FIELD
9867 && !member_function_or_else (ctype
,
9870 return error_mark_node
;
9872 if (flags
!= DTOR_FLAG
)
9874 /* It's a constructor. */
9879 permerror (input_location
, "constructors cannot be declared virtual");
9882 if (decl_context
== FIELD
9883 && sfk
!= sfk_constructor
)
9884 return error_mark_node
;
9886 if (decl_context
== FIELD
)
9893 /* Cannot be both friend and virtual. */
9894 error ("virtual functions cannot be friends");
9897 if (decl_context
== NORMAL
)
9898 error ("friend declaration not in class definition");
9899 if (current_function_decl
&& funcdef_flag
)
9900 error ("can%'t define friend function %qs in a local "
9904 else if (ctype
&& sfk
== sfk_conversion
)
9908 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9911 if (late_return_type_p
)
9912 error ("a conversion function cannot have a trailing return type");
9915 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9918 if (inner_declarator
9919 && inner_declarator
->kind
== cdk_id
9920 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9921 && arg_types
!= void_list_node
)
9923 error ("destructors may not have parameters");
9924 arg_types
= void_list_node
;
9928 type
= build_function_type (type
, arg_types
);
9929 if (declarator
->std_attributes
)
9932 The optional attribute-specifier-seq appertains to
9933 the function type. */
9934 decl_attributes (&type
, declarator
->std_attributes
,
9942 /* Filter out pointers-to-references and references-to-references.
9943 We can get these if a TYPE_DECL is used. */
9945 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9947 if (declarator
->kind
!= cdk_reference
)
9949 error ("cannot declare pointer to %q#T", type
);
9950 type
= TREE_TYPE (type
);
9953 /* In C++0x, we allow reference to reference declarations
9954 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9955 and template type arguments [14.3.1/4 temp.arg.type]. The
9956 check for direct reference to reference declarations, which
9957 are still forbidden, occurs below. Reasoning behind the change
9958 can be found in DR106, DR540, and the rvalue reference
9960 else if (cxx_dialect
== cxx98
)
9962 error ("cannot declare reference to %q#T", type
);
9963 type
= TREE_TYPE (type
);
9966 else if (VOID_TYPE_P (type
))
9968 if (declarator
->kind
== cdk_reference
)
9969 error ("cannot declare reference to %q#T", type
);
9970 else if (declarator
->kind
== cdk_ptrmem
)
9971 error ("cannot declare pointer to %q#T member", type
);
9974 /* We now know that the TYPE_QUALS don't apply to the decl,
9975 but to the target of the pointer. */
9976 type_quals
= TYPE_UNQUALIFIED
;
9978 /* This code used to handle METHOD_TYPE, but I don't think it's
9979 possible to get it here anymore. */
9980 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9981 if (declarator
->kind
== cdk_ptrmem
9982 && TREE_CODE (type
) == FUNCTION_TYPE
)
9984 memfn_quals
|= type_memfn_quals (type
);
9985 type
= build_memfn_type (type
,
9986 declarator
->u
.pointer
.class_type
,
9989 if (type
== error_mark_node
)
9990 return error_mark_node
;
9992 rqual
= REF_QUAL_NONE
;
9993 memfn_quals
= TYPE_UNQUALIFIED
;
9996 if (TREE_CODE (type
) == FUNCTION_TYPE
9997 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9998 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9999 error (declarator
->kind
== cdk_reference
10000 ? G_("cannot declare reference to qualified function type %qT")
10001 : G_("cannot declare pointer to qualified function type %qT"),
10004 /* When the pointed-to type involves components of variable size,
10005 care must be taken to ensure that the size evaluation code is
10006 emitted early enough to dominate all the possible later uses
10007 and late enough for the variables on which it depends to have
10010 This is expected to happen automatically when the pointed-to
10011 type has a name/declaration of it's own, but special attention
10012 is required if the type is anonymous.
10014 We handle the NORMAL and FIELD contexts here by inserting a
10015 dummy statement that just evaluates the size at a safe point
10016 and ensures it is not deferred until e.g. within a deeper
10017 conditional context (c++/43555).
10019 We expect nothing to be needed here for PARM or TYPENAME.
10020 Evaluating the size at this point for TYPENAME would
10021 actually be incorrect, as we might be in the middle of an
10022 expression with side effects on the pointed-to type size
10023 "arguments" prior to the pointer declaration point and the
10024 size evaluation could end up prior to the side effects. */
10026 if (!TYPE_NAME (type
)
10027 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10028 && at_function_scope_p ()
10029 && variably_modified_type_p (type
, NULL_TREE
))
10030 /* Force evaluation of the SAVE_EXPR. */
10031 finish_expr_stmt (TYPE_SIZE (type
));
10033 if (declarator
->kind
== cdk_reference
)
10035 /* In C++0x, the type we are creating a reference to might be
10036 a typedef which is itself a reference type. In that case,
10037 we follow the reference collapsing rules in
10038 [7.1.3/8 dcl.typedef] to create the final reference type:
10040 "If a typedef TD names a type that is a reference to a type
10041 T, an attempt to create the type 'lvalue reference to cv TD'
10042 creates the type 'lvalue reference to T,' while an attempt
10043 to create the type "rvalue reference to cv TD' creates the
10046 if (VOID_TYPE_P (type
))
10047 /* We already gave an error. */;
10048 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10050 if (declarator
->u
.reference
.rvalue_ref
)
10051 /* Leave type alone. */;
10053 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10056 type
= cp_build_reference_type
10057 (type
, declarator
->u
.reference
.rvalue_ref
);
10059 /* In C++0x, we need this check for direct reference to
10060 reference declarations, which are forbidden by
10061 [8.3.2/5 dcl.ref]. Reference to reference declarations
10062 are only allowed indirectly through typedefs and template
10063 type arguments. Example:
10065 void foo(int & &); // invalid ref-to-ref decl
10067 typedef int & int_ref;
10068 void foo(int_ref &); // valid ref-to-ref decl
10070 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10071 error ("cannot declare reference to %q#T, which is not "
10072 "a typedef or a template type argument", type
);
10074 else if (TREE_CODE (type
) == METHOD_TYPE
)
10075 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10076 else if (declarator
->kind
== cdk_ptrmem
)
10078 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10079 != NAMESPACE_DECL
);
10080 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10081 /* We will already have complained. */
10082 type
= error_mark_node
;
10084 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10088 type
= build_pointer_type (type
);
10090 /* Process a list of type modifier keywords (such as
10091 const or volatile) that were given inside the `*' or `&'. */
10093 if (declarator
->u
.pointer
.qualifiers
)
10096 = cp_build_qualified_type (type
,
10097 declarator
->u
.pointer
.qualifiers
);
10098 type_quals
= cp_type_quals (type
);
10101 /* Apply C++11 attributes to the pointer, and not to the
10102 type pointed to. This is unlike what is done for GNU
10103 attributes above. It is to comply with [dcl.ptr]/1:
10105 [the optional attribute-specifier-seq (7.6.1) appertains
10106 to the pointer and not to the object pointed to]. */
10107 if (declarator
->std_attributes
)
10108 decl_attributes (&type
, declarator
->std_attributes
,
10118 gcc_unreachable ();
10122 /* A `constexpr' specifier used in an object declaration declares
10123 the object as `const'. */
10124 if (constexpr_p
&& innermost_code
!= cdk_function
)
10126 /* DR1688 says that a `constexpr' specifier in combination with
10127 `volatile' is valid. */
10129 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10131 type_quals
|= TYPE_QUAL_CONST
;
10132 type
= cp_build_qualified_type (type
, type_quals
);
10136 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10137 && TREE_CODE (type
) != FUNCTION_TYPE
10138 && TREE_CODE (type
) != METHOD_TYPE
10139 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10141 error ("template-id %qD used as a declarator",
10143 unqualified_id
= dname
;
10146 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10147 qualified with a class-name, turn it into a METHOD_TYPE, unless
10148 we know that the function is static. We take advantage of this
10149 opportunity to do other processing that pertains to entities
10150 explicitly declared to be class members. Note that if DECLARATOR
10151 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10152 would not have exited the loop above. */
10154 && declarator
->u
.id
.qualifying_scope
10155 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10157 ctype
= declarator
->u
.id
.qualifying_scope
;
10158 ctype
= TYPE_MAIN_VARIANT (ctype
);
10159 template_count
= num_template_headers_for_class (ctype
);
10161 if (ctype
== current_class_type
)
10165 permerror (input_location
, "member functions are implicitly friends of their class");
10169 permerror (declarator
->id_loc
,
10170 "extra qualification %<%T::%> on member %qs",
10173 else if (/* If the qualifying type is already complete, then we
10174 can skip the following checks. */
10175 !COMPLETE_TYPE_P (ctype
)
10176 && (/* If the function is being defined, then
10177 qualifying type must certainly be complete. */
10179 /* A friend declaration of "T::f" is OK, even if
10180 "T" is a template parameter. But, if this
10181 function is not a friend, the qualifying type
10182 must be a class. */
10183 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10184 /* For a declaration, the type need not be
10185 complete, if either it is dependent (since there
10186 is no meaningful definition of complete in that
10187 case) or the qualifying class is currently being
10189 || !(dependent_type_p (ctype
)
10190 || currently_open_class (ctype
)))
10191 /* Check that the qualifying type is complete. */
10192 && !complete_type_or_else (ctype
, NULL_TREE
))
10193 return error_mark_node
;
10194 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10196 if (current_class_type
10197 && (!friendp
|| funcdef_flag
))
10199 error (funcdef_flag
10200 ? G_("cannot define member function %<%T::%s%> "
10202 : G_("cannot declare member function %<%T::%s%> "
10204 ctype
, name
, current_class_type
);
10205 return error_mark_node
;
10208 else if (typedef_p
&& current_class_type
)
10210 error ("cannot declare member %<%T::%s%> within %qT",
10211 ctype
, name
, current_class_type
);
10212 return error_mark_node
;
10216 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10217 ctype
= current_class_type
;
10219 /* Now TYPE has the actual type. */
10221 if (returned_attrs
)
10224 *attrlist
= chainon (returned_attrs
, *attrlist
);
10226 attrlist
= &returned_attrs
;
10230 && declarator
->kind
== cdk_id
10231 && declarator
->std_attributes
)
10232 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10233 a declarator-id appertains to the entity that is declared. */
10234 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10236 /* Handle parameter packs. */
10237 if (parameter_pack_p
)
10239 if (decl_context
== PARM
)
10240 /* Turn the type into a pack expansion.*/
10241 type
= make_pack_expansion (type
);
10243 error ("non-parameter %qs cannot be a parameter pack", name
);
10246 /* Did array size calculations overflow or does the array cover more
10247 than half of the address-space? */
10248 if (TREE_CODE (type
) == ARRAY_TYPE
10249 && COMPLETE_TYPE_P (type
)
10250 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10251 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10253 error ("size of array %qs is too large", name
);
10254 /* If we proceed with the array type as it is, we'll eventually
10255 crash in tree_to_[su]hwi(). */
10256 type
= error_mark_node
;
10259 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10260 && !processing_template_decl
10261 && variably_modified_type_p (type
, NULL_TREE
))
10263 if (decl_context
== FIELD
)
10264 error ("data member may not have variably modified type %qT", type
);
10266 error ("parameter may not have variably modified type %qT", type
);
10267 type
= error_mark_node
;
10270 if (explicitp
== 1 || (explicitp
&& friendp
))
10272 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10273 in the declaration of a constructor or conversion function within
10274 a class definition. */
10275 if (!current_class_type
)
10276 error_at (declspecs
->locations
[ds_explicit
],
10277 "%<explicit%> outside class declaration");
10279 error_at (declspecs
->locations
[ds_explicit
],
10280 "%<explicit%> in friend declaration");
10282 error_at (declspecs
->locations
[ds_explicit
],
10283 "only declarations of constructors and conversion operators "
10284 "can be %<explicit%>");
10288 if (storage_class
== sc_mutable
)
10290 if (decl_context
!= FIELD
|| friendp
)
10292 error ("non-member %qs cannot be declared %<mutable%>", name
);
10293 storage_class
= sc_none
;
10295 else if (decl_context
== TYPENAME
|| typedef_p
)
10297 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10298 storage_class
= sc_none
;
10300 else if (TREE_CODE (type
) == FUNCTION_TYPE
10301 || TREE_CODE (type
) == METHOD_TYPE
)
10303 error ("function %qs cannot be declared %<mutable%>", name
);
10304 storage_class
= sc_none
;
10308 error ("static %qs cannot be declared %<mutable%>", name
);
10309 storage_class
= sc_none
;
10311 else if (type_quals
& TYPE_QUAL_CONST
)
10313 error ("const %qs cannot be declared %<mutable%>", name
);
10314 storage_class
= sc_none
;
10316 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10318 permerror (input_location
, "reference %qs cannot be declared "
10319 "%<mutable%>", name
);
10320 storage_class
= sc_none
;
10324 /* If this is declaring a typedef name, return a TYPE_DECL. */
10325 if (typedef_p
&& decl_context
!= TYPENAME
)
10329 /* Note that the grammar rejects storage classes
10330 in typenames, fields or parameters. */
10331 if (current_lang_name
== lang_name_java
)
10332 TYPE_FOR_JAVA (type
) = 1;
10334 /* This declaration:
10336 typedef void f(int) const;
10338 declares a function type which is not a member of any
10339 particular class, but which is cv-qualified; for
10340 example "f S::*" declares a pointer to a const-qualified
10341 member function of S. We record the cv-qualification in the
10343 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10345 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10347 /* We have now dealt with these qualifiers. */
10348 memfn_quals
= TYPE_UNQUALIFIED
;
10349 rqual
= REF_QUAL_NONE
;
10352 if (type_uses_auto (type
))
10354 error ("typedef declared %<auto%>");
10355 type
= error_mark_node
;
10358 if (decl_context
== FIELD
)
10359 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10361 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10362 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10363 error_at (DECL_SOURCE_LOCATION (decl
),
10364 "typedef name may not be a nested-name-specifier");
10365 TREE_TYPE (decl
) = error_mark_node
;
10368 if (decl_context
!= FIELD
)
10370 if (!current_function_decl
)
10371 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10372 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10373 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10374 (current_function_decl
)))
10375 /* The TYPE_DECL is "abstract" because there will be
10376 clones of this constructor/destructor, and there will
10377 be copies of this TYPE_DECL generated in those
10378 clones. The decloning optimization (for space) may
10379 revert this subsequently if it determines that
10380 the clones should share a common implementation. */
10381 DECL_ABSTRACT_P (decl
) = true;
10383 else if (current_class_type
10384 && constructor_name_p (unqualified_id
, current_class_type
))
10385 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10386 "as enclosing class",
10389 /* If the user declares "typedef struct {...} foo" then the
10390 struct will have an anonymous name. Fill that name in now.
10391 Nothing can refer to it, so nothing needs know about the name
10393 if (type
!= error_mark_node
10395 && TYPE_NAME (type
)
10396 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10397 && TYPE_ANONYMOUS_P (type
)
10398 && declspecs
->type_definition_p
10399 && attributes_naming_typedef_ok (*attrlist
)
10400 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10404 /* Replace the anonymous name with the real name everywhere. */
10405 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10407 if (anon_aggrname_p (TYPE_IDENTIFIER (t
)))
10408 /* We do not rename the debug info representing the
10409 anonymous tagged type because the standard says in
10410 [dcl.typedef] that the naming applies only for
10411 linkage purposes. */
10412 /*debug_hooks->set_name (t, decl);*/
10413 TYPE_NAME (t
) = decl
;
10416 if (TYPE_LANG_SPECIFIC (type
))
10417 TYPE_WAS_ANONYMOUS (type
) = 1;
10419 /* If this is a typedef within a template class, the nested
10420 type is a (non-primary) template. The name for the
10421 template needs updating as well. */
10422 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10423 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10424 = TYPE_IDENTIFIER (type
);
10426 /* Adjust linkage now that we aren't anonymous anymore. */
10427 reset_type_linkage (type
);
10429 /* FIXME remangle member functions; member functions of a
10430 type with external linkage have external linkage. */
10434 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10435 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10437 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10438 memfn_quals
!= TYPE_UNQUALIFIED
,
10439 inlinep
, friendp
, raises
!= NULL_TREE
);
10441 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10442 /* Acknowledge that this was written:
10443 `using analias = atype;'. */
10444 TYPE_DECL_ALIAS_P (decl
) = 1;
10449 /* Detect the case of an array type of unspecified size
10450 which came, as such, direct from a typedef name.
10451 We must copy the type, so that the array's domain can be
10452 individually set by the object's initializer. */
10454 if (type
&& typedef_type
10455 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10456 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10457 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10459 /* Detect where we're using a typedef of function type to declare a
10460 function. PARMS will not be set, so we must create it now. */
10462 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10464 tree decls
= NULL_TREE
;
10467 for (args
= TYPE_ARG_TYPES (type
);
10468 args
&& args
!= void_list_node
;
10469 args
= TREE_CHAIN (args
))
10471 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10473 DECL_CHAIN (decl
) = decls
;
10477 parms
= nreverse (decls
);
10479 if (decl_context
!= TYPENAME
)
10481 /* The qualifiers on the function type become the qualifiers on
10482 the non-static member function. */
10483 memfn_quals
|= type_memfn_quals (type
);
10484 rqual
= type_memfn_rqual (type
);
10485 type_quals
= TYPE_UNQUALIFIED
;
10489 /* If this is a type name (such as, in a cast or sizeof),
10490 compute the type and return it now. */
10492 if (decl_context
== TYPENAME
)
10494 /* Note that here we don't care about type_quals. */
10496 /* Special case: "friend class foo" looks like a TYPENAME context. */
10501 error ("%<inline%> specified for friend class declaration");
10507 /* Don't allow friend declaration without a class-key. */
10508 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10509 permerror (input_location
, "template parameters cannot be friends");
10510 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10511 permerror (input_location
, "friend declaration requires class-key, "
10512 "i.e. %<friend class %T::%D%>",
10513 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10515 permerror (input_location
, "friend declaration requires class-key, "
10516 "i.e. %<friend %#T%>",
10520 /* Only try to do this stuff if we didn't already give up. */
10521 if (type
!= integer_type_node
)
10523 /* A friendly class? */
10524 if (current_class_type
)
10525 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10526 /*complain=*/true);
10528 error ("trying to make class %qT a friend of global scope",
10531 type
= void_type_node
;
10534 else if (memfn_quals
|| rqual
)
10536 if (ctype
== NULL_TREE
10537 && TREE_CODE (type
) == METHOD_TYPE
)
10538 ctype
= TYPE_METHOD_BASETYPE (type
);
10541 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10542 /* Core issue #547: need to allow this in template type args.
10543 Allow it in general in C++11 for alias-declarations. */
10544 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10545 && TREE_CODE (type
) == FUNCTION_TYPE
)
10546 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10548 error ("invalid qualifiers on non-member function type");
10553 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10554 && decl_context
!= CATCHPARM
10555 && TREE_CODE (type
) != UNION_TYPE
10558 error ("abstract declarator %qT used as declaration", type
);
10559 return error_mark_node
;
10562 /* Only functions may be declared using an operator-function-id. */
10564 && IDENTIFIER_OPNAME_P (unqualified_id
)
10565 && TREE_CODE (type
) != FUNCTION_TYPE
10566 && TREE_CODE (type
) != METHOD_TYPE
)
10568 error ("declaration of %qD as non-function", unqualified_id
);
10569 return error_mark_node
;
10572 /* We don't check parameter types here because we can emit a better
10573 error message later. */
10574 if (decl_context
!= PARM
)
10576 type
= check_var_type (unqualified_id
, type
);
10577 if (type
== error_mark_node
)
10578 return error_mark_node
;
10581 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10582 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10584 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10586 if (ctype
|| in_namespace
)
10587 error ("cannot use %<::%> in parameter declaration");
10589 if (type_uses_auto (type
))
10591 if (cxx_dialect
>= cxx14
)
10592 error ("%<auto%> parameter not permitted in this context");
10594 error ("parameter declared %<auto%>");
10595 type
= error_mark_node
;
10598 /* A parameter declared as an array of T is really a pointer to T.
10599 One declared as a function is really a pointer to a function.
10600 One declared as a member is really a pointer to member. */
10602 if (TREE_CODE (type
) == ARRAY_TYPE
)
10604 /* Transfer const-ness of array into that of type pointed to. */
10605 type
= build_pointer_type (TREE_TYPE (type
));
10606 type_quals
= TYPE_UNQUALIFIED
;
10607 array_parameter_p
= true;
10609 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10610 type
= build_pointer_type (type
);
10613 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10614 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10616 cp_cv_quals real_quals
= memfn_quals
;
10617 if (cxx_dialect
< cxx14
&& constexpr_p
10618 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10619 real_quals
|= TYPE_QUAL_CONST
;
10620 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10626 if (decl_context
== PARM
)
10628 decl
= cp_build_parm_decl (unqualified_id
, type
);
10629 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10631 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10632 memfn_quals
!= TYPE_UNQUALIFIED
,
10633 inlinep
, friendp
, raises
!= NULL_TREE
);
10635 else if (decl_context
== FIELD
)
10637 if (!staticp
&& !friendp
&& TREE_CODE (type
) != METHOD_TYPE
10638 && type_uses_auto (type
))
10640 error ("non-static data member declared %<auto%>");
10641 type
= error_mark_node
;
10644 /* The C99 flexible array extension. */
10645 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10646 && TYPE_DOMAIN (type
) == NULL_TREE
)
10648 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10649 tf_warning_or_error
);
10650 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10653 if (type
== error_mark_node
)
10655 /* Happens when declaring arrays of sizes which
10656 are error_mark_node, for example. */
10659 else if (in_namespace
&& !friendp
)
10661 /* Something like struct S { int N::j; }; */
10662 error ("invalid use of %<::%>");
10663 return error_mark_node
;
10665 else if (TREE_CODE (type
) == FUNCTION_TYPE
10666 || TREE_CODE (type
) == METHOD_TYPE
)
10669 tree function_context
;
10673 /* This should never happen in pure C++ (the check
10674 could be an assert). It could happen in
10675 Objective-C++ if someone writes invalid code that
10676 uses a function declaration for an instance
10677 variable or property (instance variables and
10678 properties are parsed as FIELD_DECLs, but they are
10679 part of an Objective-C class, not a C++ class).
10680 That code is invalid and is caught by this
10684 error ("declaration of function %qD in invalid context",
10686 return error_mark_node
;
10689 /* ``A union may [ ... ] not [ have ] virtual functions.''
10691 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10693 error ("function %qD declared virtual inside a union",
10695 return error_mark_node
;
10698 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10702 error ("%qD cannot be declared virtual, since it "
10703 "is always static",
10710 /* Check that the name used for a destructor makes sense. */
10711 if (sfk
== sfk_destructor
)
10713 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10717 gcc_assert (friendp
);
10718 error ("expected qualified name in friend declaration "
10719 "for destructor %qD", uqname
);
10720 return error_mark_node
;
10723 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10725 error ("declaration of %qD as member of %qT",
10727 return error_mark_node
;
10731 error ("a destructor cannot be %<constexpr%>");
10732 return error_mark_node
;
10735 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10737 error ("expected qualified name in friend declaration "
10738 "for constructor %qD",
10739 id_declarator
->u
.id
.unqualified_name
);
10740 return error_mark_node
;
10743 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10745 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
10746 if (variable_template_p (tmpl
))
10748 error ("specialization of variable template %qD "
10749 "declared as function", tmpl
);
10750 inform (DECL_SOURCE_LOCATION (tmpl
),
10751 "variable template declared here");
10752 return error_mark_node
;
10756 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10757 function_context
= (ctype
!= NULL_TREE
) ?
10758 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10759 publicp
= (! friendp
|| ! staticp
)
10760 && function_context
== NULL_TREE
;
10762 if (late_return_type_p
)
10763 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10765 decl
= grokfndecl (ctype
, type
,
10766 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10767 ? unqualified_id
: dname
,
10770 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10771 friendp
? -1 : 0, friendp
, publicp
,
10772 inlinep
| (2 * constexpr_p
),
10773 initialized
== SD_DELETED
, sfk
,
10774 funcdef_flag
, template_count
, in_namespace
,
10775 attrlist
, declarator
->id_loc
);
10776 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10777 if (decl
== NULL_TREE
)
10778 return error_mark_node
;
10780 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10781 /* The decl and setting of decl_attr is also turned off. */
10782 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10785 /* [class.conv.ctor]
10787 A constructor declared without the function-specifier
10788 explicit that can be called with a single parameter
10789 specifies a conversion from the type of its first
10790 parameter to the type of its class. Such a constructor
10791 is called a converting constructor. */
10792 if (explicitp
== 2)
10793 DECL_NONCONVERTING_P (decl
) = 1;
10795 else if (!staticp
&& !dependent_type_p (type
)
10796 && !COMPLETE_TYPE_P (complete_type (type
))
10797 && (TREE_CODE (type
) != ARRAY_TYPE
10798 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10799 || initialized
== 0))
10801 if (unqualified_id
)
10803 error ("field %qD has incomplete type %qT",
10804 unqualified_id
, type
);
10805 cxx_incomplete_type_inform (strip_array_types (type
));
10808 error ("name %qT has incomplete type", type
);
10810 type
= error_mark_node
;
10817 error ("%qE is neither function nor member function; "
10818 "cannot be declared friend", unqualified_id
);
10826 /* Friends are treated specially. */
10827 if (ctype
== current_class_type
)
10828 ; /* We already issued a permerror. */
10829 else if (decl
&& DECL_NAME (decl
))
10831 if (template_class_depth (current_class_type
) == 0)
10833 decl
= check_explicit_specialization
10834 (unqualified_id
, decl
, template_count
,
10835 2 * funcdef_flag
+ 4);
10836 if (decl
== error_mark_node
)
10837 return error_mark_node
;
10840 decl
= do_friend (ctype
, unqualified_id
, decl
,
10846 return error_mark_node
;
10849 /* Structure field. It may not be a function, except for C++. */
10851 if (decl
== NULL_TREE
)
10855 /* C++ allows static class members. All other work
10856 for this is done by grokfield. */
10857 decl
= build_lang_decl_loc (declarator
10858 ? declarator
->id_loc
10860 VAR_DECL
, unqualified_id
, type
);
10861 set_linkage_for_static_data_member (decl
);
10862 /* Even if there is an in-class initialization, DECL
10863 is considered undefined until an out-of-class
10864 definition is provided. */
10865 DECL_EXTERNAL (decl
) = 1;
10869 CP_DECL_THREAD_LOCAL_P (decl
) = true;
10870 if (!processing_template_decl
)
10871 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10872 if (declspecs
->gnu_thread_keyword_p
)
10873 SET_DECL_GNU_TLS_P (decl
);
10876 if (constexpr_p
&& !initialized
)
10878 error ("constexpr static data member %qD must have an "
10879 "initializer", decl
);
10880 constexpr_p
= false;
10887 error ("non-static data member %qE declared %<constexpr%>",
10889 constexpr_p
= false;
10891 decl
= build_decl (input_location
,
10892 FIELD_DECL
, unqualified_id
, type
);
10893 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10894 if (bitfield
&& !unqualified_id
)
10895 TREE_NO_WARNING (decl
) = 1;
10897 if (storage_class
== sc_mutable
)
10899 DECL_MUTABLE_P (decl
) = 1;
10900 storage_class
= sc_none
;
10905 /* An attempt is being made to initialize a non-static
10906 member. This is new in C++11. */
10907 maybe_warn_cpp0x (CPP0X_NSDMI
);
10909 /* If this has been parsed with static storage class, but
10910 errors forced staticp to be cleared, ensure NSDMI is
10912 if (declspecs
->storage_class
== sc_static
)
10913 DECL_INITIAL (decl
) = error_mark_node
;
10917 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10918 memfn_quals
!= TYPE_UNQUALIFIED
,
10919 inlinep
, friendp
, raises
!= NULL_TREE
);
10922 else if (TREE_CODE (type
) == FUNCTION_TYPE
10923 || TREE_CODE (type
) == METHOD_TYPE
)
10925 tree original_name
;
10928 if (!unqualified_id
)
10929 return error_mark_node
;
10931 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10932 original_name
= dname
;
10934 original_name
= unqualified_id
;
10936 if (storage_class
== sc_auto
)
10937 error ("storage class %<auto%> invalid for function %qs", name
);
10938 else if (storage_class
== sc_register
)
10939 error ("storage class %<register%> invalid for function %qs", name
);
10942 if (declspecs
->gnu_thread_keyword_p
)
10943 error ("storage class %<__thread%> invalid for function %qs",
10946 error ("storage class %<thread_local%> invalid for function %qs",
10950 if (virt_specifiers
)
10951 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10952 /* Function declaration not at top level.
10953 Storage classes other than `extern' are not allowed
10954 and `extern' makes no difference. */
10955 if (! toplevel_bindings_p ()
10956 && (storage_class
== sc_static
10957 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10960 if (storage_class
== sc_static
)
10961 pedwarn (input_location
, OPT_Wpedantic
,
10962 "%<static%> specified invalid for function %qs "
10963 "declared out of global scope", name
);
10965 pedwarn (input_location
, OPT_Wpedantic
,
10966 "%<inline%> specifier invalid for function %qs "
10967 "declared out of global scope", name
);
10970 if (ctype
== NULL_TREE
)
10974 error ("virtual non-class function %qs", name
);
10977 else if (sfk
== sfk_constructor
10978 || sfk
== sfk_destructor
)
10980 error (funcdef_flag
10981 ? G_("%qs defined in a non-class scope")
10982 : G_("%qs declared in a non-class scope"), name
);
10987 /* Record whether the function is public. */
10988 publicp
= (ctype
!= NULL_TREE
10989 || storage_class
!= sc_static
);
10991 if (late_return_type_p
)
10992 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10994 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10995 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10997 publicp
, inlinep
| (2 * constexpr_p
),
10998 initialized
== SD_DELETED
, sfk
,
11000 template_count
, in_namespace
, attrlist
,
11001 declarator
->id_loc
);
11002 if (decl
== NULL_TREE
)
11003 return error_mark_node
;
11007 int invalid_static
= 0;
11009 /* Don't allow a static member function in a class, and forbid
11010 declaring main to be static. */
11011 if (TREE_CODE (type
) == METHOD_TYPE
)
11013 permerror (input_location
, "cannot declare member function %qD to have "
11014 "static linkage", decl
);
11015 invalid_static
= 1;
11017 else if (current_function_decl
)
11019 /* FIXME need arm citation */
11020 error ("cannot declare static function inside another function");
11021 invalid_static
= 1;
11024 if (invalid_static
)
11027 storage_class
= sc_none
;
11033 /* It's a variable. */
11035 /* An uninitialized decl with `extern' is a reference. */
11036 decl
= grokvardecl (type
, dname
, unqualified_id
,
11039 (type_quals
& TYPE_QUAL_CONST
) != 0,
11041 ctype
? ctype
: in_namespace
);
11042 if (decl
== NULL_TREE
)
11043 return error_mark_node
;
11045 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11046 memfn_quals
!= TYPE_UNQUALIFIED
,
11047 inlinep
, friendp
, raises
!= NULL_TREE
);
11051 DECL_CONTEXT (decl
) = ctype
;
11054 permerror (input_location
, "%<static%> may not be used when defining "
11055 "(as opposed to declaring) a static data member");
11057 storage_class
= sc_none
;
11059 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11061 error ("static member %qD declared %<register%>", decl
);
11062 storage_class
= sc_none
;
11064 if (storage_class
== sc_extern
&& pedantic
)
11066 pedwarn (input_location
, OPT_Wpedantic
,
11067 "cannot explicitly declare member %q#D to have "
11068 "extern linkage", decl
);
11069 storage_class
= sc_none
;
11072 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11074 error ("declaration of constexpr variable %qD is not a definition",
11076 constexpr_p
= false;
11080 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11082 if (toplevel_bindings_p ())
11084 /* It's common practice (and completely valid) to have a const
11085 be initialized and declared extern. */
11086 if (!(type_quals
& TYPE_QUAL_CONST
))
11087 warning (0, "%qs initialized and declared %<extern%>", name
);
11091 error ("%qs has both %<extern%> and initializer", name
);
11092 return error_mark_node
;
11096 /* Record `register' declaration for warnings on &
11097 and in case doing stupid register allocation. */
11099 if (storage_class
== sc_register
)
11100 DECL_REGISTER (decl
) = 1;
11101 else if (storage_class
== sc_extern
)
11102 DECL_THIS_EXTERN (decl
) = 1;
11103 else if (storage_class
== sc_static
)
11104 DECL_THIS_STATIC (decl
) = 1;
11106 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11107 if (constexpr_p
&& VAR_P (decl
))
11108 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11110 /* Record constancy and volatility on the DECL itself . There's
11111 no need to do this when processing a template; we'll do this
11112 for the instantiated declaration based on the type of DECL. */
11113 if (!processing_template_decl
)
11114 cp_apply_type_quals_to_decl (type_quals
, decl
);
11120 /* Subroutine of start_function. Ensure that each of the parameter
11121 types (as listed in PARMS) is complete, as is required for a
11122 function definition. */
11125 require_complete_types_for_parms (tree parms
)
11127 for (; parms
; parms
= DECL_CHAIN (parms
))
11129 if (dependent_type_p (TREE_TYPE (parms
)))
11131 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11132 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11134 relayout_decl (parms
);
11135 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11138 /* grokparms or complete_type_or_else will have already issued
11140 TREE_TYPE (parms
) = error_mark_node
;
11144 /* Returns nonzero if T is a local variable. */
11147 local_variable_p (const_tree t
)
11150 /* A VAR_DECL with a context that is a _TYPE is a static data
11152 && !TYPE_P (CP_DECL_CONTEXT (t
))
11153 /* Any other non-local variable must be at namespace scope. */
11154 && !DECL_NAMESPACE_SCOPE_P (t
))
11155 || (TREE_CODE (t
) == PARM_DECL
))
11161 /* Like local_variable_p, but suitable for use as a tree-walking
11165 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11168 if (local_variable_p (*tp
)
11169 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11171 else if (TYPE_P (*tp
))
11172 *walk_subtrees
= 0;
11177 /* Check that ARG, which is a default-argument expression for a
11178 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11179 something goes wrong. DECL may also be a _TYPE node, rather than a
11180 DECL, if there is no DECL available. */
11183 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11188 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11189 /* We get a DEFAULT_ARG when looking at an in-class declaration
11190 with a default argument. Ignore the argument for now; we'll
11191 deal with it after the class is complete. */
11200 decl_type
= TREE_TYPE (decl
);
11202 if (arg
== error_mark_node
11203 || decl
== error_mark_node
11204 || TREE_TYPE (arg
) == error_mark_node
11205 || decl_type
== error_mark_node
)
11206 /* Something already went wrong. There's no need to check
11208 return error_mark_node
;
11210 /* [dcl.fct.default]
11212 A default argument expression is implicitly converted to the
11214 ++cp_unevaluated_operand
;
11215 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11217 --cp_unevaluated_operand
;
11219 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
11221 if (TYPE_PTR_OR_PTRMEM_P (decl_type
)
11222 && null_ptr_cst_p (arg
))
11223 return nullptr_node
;
11225 /* [dcl.fct.default]
11227 Local variables shall not be used in default argument
11230 The keyword `this' shall not be used in a default argument of a
11231 member function. */
11232 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11235 if (complain
& tf_warning_or_error
)
11237 if (DECL_NAME (var
) == this_identifier
)
11238 permerror (input_location
, "default argument %qE uses %qD",
11241 error ("default argument %qE uses local variable %qD", arg
, var
);
11243 return error_mark_node
;
11250 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11253 type_is_deprecated (tree type
)
11255 enum tree_code code
;
11256 if (TREE_DEPRECATED (type
))
11258 if (TYPE_NAME (type
)
11259 && TREE_DEPRECATED (TYPE_NAME (type
)))
11262 /* Do warn about using typedefs to a deprecated class. */
11263 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11264 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11266 code
= TREE_CODE (type
);
11268 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11269 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11270 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11271 return type_is_deprecated (TREE_TYPE (type
));
11273 if (TYPE_PTRMEMFUNC_P (type
))
11274 return type_is_deprecated
11275 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11280 /* Decode the list of parameter types for a function type.
11281 Given the list of things declared inside the parens,
11282 return a list of types.
11284 If this parameter does not end with an ellipsis, we append
11287 *PARMS is set to the chain of PARM_DECLs created. */
11290 grokparms (tree parmlist
, tree
*parms
)
11292 tree result
= NULL_TREE
;
11293 tree decls
= NULL_TREE
;
11297 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11299 tree type
= NULL_TREE
;
11300 tree init
= TREE_PURPOSE (parm
);
11301 tree decl
= TREE_VALUE (parm
);
11302 const char *errmsg
;
11304 if (parm
== void_list_node
)
11307 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11310 type
= TREE_TYPE (decl
);
11311 if (VOID_TYPE_P (type
))
11313 if (same_type_p (type
, void_type_node
)
11315 && !DECL_NAME (decl
) && !result
11316 && TREE_CHAIN (parm
) == void_list_node
)
11317 /* DR 577: A parameter list consisting of a single
11318 unnamed parameter of non-dependent type 'void'. */
11320 else if (cv_qualified_p (type
))
11321 error_at (DECL_SOURCE_LOCATION (decl
),
11322 "invalid use of cv-qualified type %qT in "
11323 "parameter declaration", type
);
11325 error_at (DECL_SOURCE_LOCATION (decl
),
11326 "invalid use of type %<void%> in parameter "
11328 /* It's not a good idea to actually create parameters of
11329 type `void'; other parts of the compiler assume that a
11330 void type terminates the parameter list. */
11331 type
= error_mark_node
;
11332 TREE_TYPE (decl
) = error_mark_node
;
11335 if (type
!= error_mark_node
11336 && TYPE_FOR_JAVA (type
)
11337 && MAYBE_CLASS_TYPE_P (type
))
11339 error ("parameter %qD has Java class type", decl
);
11340 type
= error_mark_node
;
11341 TREE_TYPE (decl
) = error_mark_node
;
11345 if (type
!= error_mark_node
11346 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11349 type
= error_mark_node
;
11350 TREE_TYPE (decl
) = error_mark_node
;
11353 if (type
!= error_mark_node
)
11355 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11357 tree deptype
= type_is_deprecated (type
);
11359 warn_deprecated_use (deptype
, NULL_TREE
);
11362 /* Top-level qualifiers on the parameters are
11363 ignored for function types. */
11364 type
= cp_build_qualified_type (type
, 0);
11365 if (TREE_CODE (type
) == METHOD_TYPE
)
11367 error ("parameter %qD invalidly declared method type", decl
);
11368 type
= build_pointer_type (type
);
11369 TREE_TYPE (decl
) = type
;
11371 else if (abstract_virtuals_error (decl
, type
))
11372 any_error
= 1; /* Seems like a good idea. */
11373 else if (POINTER_TYPE_P (type
))
11375 /* [dcl.fct]/6, parameter types cannot contain pointers
11376 (references) to arrays of unknown bound. */
11377 tree t
= TREE_TYPE (type
);
11378 int ptr
= TYPE_PTR_P (type
);
11382 if (TYPE_PTR_P (t
))
11384 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11386 else if (!TYPE_DOMAIN (t
))
11390 if (TREE_CODE (t
) == ARRAY_TYPE
)
11392 ? G_("parameter %qD includes pointer to array of "
11393 "unknown bound %qT")
11394 : G_("parameter %qD includes reference to array of "
11395 "unknown bound %qT"),
11401 else if (init
&& !processing_template_decl
)
11402 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11405 DECL_CHAIN (decl
) = decls
;
11407 result
= tree_cons (init
, type
, result
);
11409 decls
= nreverse (decls
);
11410 result
= nreverse (result
);
11412 result
= chainon (result
, void_list_node
);
11419 /* D is a constructor or overloaded `operator='.
11421 Let T be the class in which D is declared. Then, this function
11424 -1 if D's is an ill-formed constructor or copy assignment operator
11425 whose first parameter is of type `T'.
11426 0 if D is not a copy constructor or copy assignment
11428 1 if D is a copy constructor or copy assignment operator whose
11429 first parameter is a reference to non-const qualified T.
11430 2 if D is a copy constructor or copy assignment operator whose
11431 first parameter is a reference to const qualified T.
11433 This function can be used as a predicate. Positive values indicate
11434 a copy constructor and nonzero values indicate a copy assignment
11438 copy_fn_p (const_tree d
)
11444 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11446 if (TREE_CODE (d
) == TEMPLATE_DECL
11447 || (DECL_TEMPLATE_INFO (d
)
11448 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11449 /* Instantiations of template member functions are never copy
11450 functions. Note that member functions of templated classes are
11451 represented as template functions internally, and we must
11452 accept those as copy functions. */
11455 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11459 arg_type
= TREE_VALUE (args
);
11460 if (arg_type
== error_mark_node
)
11463 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11465 /* Pass by value copy assignment operator. */
11468 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11469 && !TYPE_REF_IS_RVALUE (arg_type
)
11470 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11472 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11478 args
= TREE_CHAIN (args
);
11480 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11481 /* There are more non-optional args. */
11487 /* D is a constructor or overloaded `operator='.
11489 Let T be the class in which D is declared. Then, this function
11490 returns true when D is a move constructor or move assignment
11491 operator, false otherwise. */
11494 move_fn_p (const_tree d
)
11496 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11498 if (cxx_dialect
== cxx98
)
11499 /* There are no move constructors if we are in C++98 mode. */
11502 if (TREE_CODE (d
) == TEMPLATE_DECL
11503 || (DECL_TEMPLATE_INFO (d
)
11504 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11505 /* Instantiations of template member functions are never move
11506 functions. Note that member functions of templated classes are
11507 represented as template functions internally, and we must
11508 accept those as move functions. */
11511 return move_signature_fn_p (d
);
11514 /* D is a constructor or overloaded `operator='.
11516 Then, this function returns true when D has the same signature as a move
11517 constructor or move assignment operator (because either it is such a
11518 ctor/op= or it is a template specialization with the same signature),
11519 false otherwise. */
11522 move_signature_fn_p (const_tree d
)
11526 bool result
= false;
11528 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11532 arg_type
= TREE_VALUE (args
);
11533 if (arg_type
== error_mark_node
)
11536 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11537 && TYPE_REF_IS_RVALUE (arg_type
)
11538 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11542 args
= TREE_CHAIN (args
);
11544 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11545 /* There are more non-optional args. */
11551 /* Remember any special properties of member function DECL. */
11554 grok_special_member_properties (tree decl
)
11558 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11561 class_type
= DECL_CONTEXT (decl
);
11562 if (DECL_CONSTRUCTOR_P (decl
))
11564 int ctor
= copy_fn_p (decl
);
11566 if (!DECL_ARTIFICIAL (decl
))
11567 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11573 A non-template constructor for class X is a copy
11574 constructor if its first parameter is of type X&, const
11575 X&, volatile X& or const volatile X&, and either there
11576 are no other parameters or else all other parameters have
11577 default arguments. */
11578 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11579 if (user_provided_p (decl
))
11580 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11582 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11584 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11585 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11586 else if (move_fn_p (decl
) && user_provided_p (decl
))
11587 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11588 else if (is_list_ctor (decl
))
11589 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11591 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11592 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11593 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11595 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11599 A non-template assignment operator for class X is a copy
11600 assignment operator if its parameter is of type X, X&, const
11601 X&, volatile X& or const volatile X&. */
11603 int assop
= copy_fn_p (decl
);
11607 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11608 if (user_provided_p (decl
))
11609 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11611 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11613 else if (move_fn_p (decl
) && user_provided_p (decl
))
11614 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11616 /* Destructors are handled in check_methods. */
11619 /* Check a constructor DECL has the correct form. Complains
11620 if the class has a constructor of the form X(X). */
11623 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11625 int ctor_parm
= copy_fn_p (decl
);
11631 A declaration of a constructor for a class X is ill-formed if
11632 its first parameter is of type (optionally cv-qualified) X
11633 and either there are no other parameters or else all other
11634 parameters have default arguments.
11636 We *don't* complain about member template instantiations that
11637 have this form, though; they can occur as we try to decide
11638 what constructor to use during overload resolution. Since
11639 overload resolution will never prefer such a constructor to
11640 the non-template copy constructor (which is either explicitly
11641 or implicitly defined), there's no need to worry about their
11642 existence. Theoretically, they should never even be
11643 instantiated, but that's hard to forestall. */
11644 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11652 /* An operator with this code is unary, but can also be binary. */
11655 ambi_op_p (enum tree_code code
)
11657 return (code
== INDIRECT_REF
11658 || code
== ADDR_EXPR
11659 || code
== UNARY_PLUS_EXPR
11660 || code
== NEGATE_EXPR
11661 || code
== PREINCREMENT_EXPR
11662 || code
== PREDECREMENT_EXPR
);
11665 /* An operator with this name can only be unary. */
11668 unary_op_p (enum tree_code code
)
11670 return (code
== TRUTH_NOT_EXPR
11671 || code
== BIT_NOT_EXPR
11672 || code
== COMPONENT_REF
11673 || code
== TYPE_EXPR
);
11676 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11677 errors are issued for invalid declarations. */
11680 grok_op_properties (tree decl
, bool complain
)
11682 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11684 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11685 tree name
= DECL_NAME (decl
);
11686 enum tree_code operator_code
;
11691 /* Count the number of arguments and check for ellipsis. */
11692 for (argtype
= argtypes
, arity
= 0;
11693 argtype
&& argtype
!= void_list_node
;
11694 argtype
= TREE_CHAIN (argtype
))
11696 ellipsis_p
= !argtype
;
11698 class_type
= DECL_CONTEXT (decl
);
11699 if (class_type
&& !CLASS_TYPE_P (class_type
))
11700 class_type
= NULL_TREE
;
11702 if (DECL_CONV_FN_P (decl
))
11703 operator_code
= TYPE_EXPR
;
11707 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11708 if (ansi_opname (CODE) == name) \
11710 operator_code = (CODE); \
11713 else if (ansi_assopname (CODE) == name) \
11715 operator_code = (CODE); \
11716 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11720 #include "operators.def"
11721 #undef DEF_OPERATOR
11723 gcc_unreachable ();
11726 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11727 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11730 switch (operator_code
)
11733 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11737 TYPE_GETS_DELETE (class_type
) |= 1;
11741 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11744 case VEC_DELETE_EXPR
:
11745 TYPE_GETS_DELETE (class_type
) |= 2;
11752 /* [basic.std.dynamic.allocation]/1:
11754 A program is ill-formed if an allocation function is declared
11755 in a namespace scope other than global scope or declared static
11758 The same also holds true for deallocation functions. */
11759 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11760 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11762 if (DECL_NAMESPACE_SCOPE_P (decl
))
11764 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11766 error ("%qD may not be declared within a namespace", decl
);
11769 else if (!TREE_PUBLIC (decl
))
11771 error ("%qD may not be declared as static", decl
);
11777 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11779 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11780 DECL_IS_OPERATOR_NEW (decl
) = 1;
11782 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11783 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11786 /* An operator function must either be a non-static member function
11787 or have at least one parameter of a class, a reference to a class,
11788 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11789 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11791 if (operator_code
== TYPE_EXPR
11792 || operator_code
== CALL_EXPR
11793 || operator_code
== COMPONENT_REF
11794 || operator_code
== ARRAY_REF
11795 || operator_code
== NOP_EXPR
)
11797 error ("%qD must be a nonstatic member function", decl
);
11804 if (DECL_STATIC_FUNCTION_P (decl
))
11806 error ("%qD must be either a non-static member "
11807 "function or a non-member function", decl
);
11811 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11813 tree arg
= non_reference (TREE_VALUE (p
));
11814 if (arg
== error_mark_node
)
11817 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11818 because these checks are performed even on
11819 template functions. */
11820 if (MAYBE_CLASS_TYPE_P (arg
)
11821 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11825 if (!p
|| p
== void_list_node
)
11828 error ("%qD must have an argument of class or "
11829 "enumerated type", decl
);
11835 /* There are no restrictions on the arguments to an overloaded
11837 if (operator_code
== CALL_EXPR
)
11840 /* Warn about conversion operators that will never be used. */
11841 if (IDENTIFIER_TYPENAME_P (name
)
11842 && ! DECL_TEMPLATE_INFO (decl
)
11844 /* Warn only declaring the function; there is no need to
11845 warn again about out-of-class definitions. */
11846 && class_type
== current_class_type
)
11848 tree t
= TREE_TYPE (name
);
11849 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11852 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11854 if (VOID_TYPE_P (t
))
11855 warning (OPT_Wconversion
,
11857 ? G_("conversion to a reference to void "
11858 "will never use a type conversion operator")
11859 : G_("conversion to void "
11860 "will never use a type conversion operator"));
11861 else if (class_type
)
11863 if (t
== class_type
)
11864 warning (OPT_Wconversion
,
11866 ? G_("conversion to a reference to the same type "
11867 "will never use a type conversion operator")
11868 : G_("conversion to the same type "
11869 "will never use a type conversion operator"));
11870 /* Don't force t to be complete here. */
11871 else if (MAYBE_CLASS_TYPE_P (t
)
11872 && COMPLETE_TYPE_P (t
)
11873 && DERIVED_FROM_P (t
, class_type
))
11874 warning (OPT_Wconversion
,
11876 ? G_("conversion to a reference to a base class "
11877 "will never use a type conversion operator")
11878 : G_("conversion to a base class "
11879 "will never use a type conversion operator"));
11884 if (operator_code
== COND_EXPR
)
11887 error ("ISO C++ prohibits overloading operator ?:");
11890 else if (ellipsis_p
)
11892 error ("%qD must not have variable number of arguments", decl
);
11895 else if (ambi_op_p (operator_code
))
11898 /* We pick the one-argument operator codes by default, so
11899 we don't have to change anything. */
11901 else if (arity
== 2)
11903 /* If we thought this was a unary operator, we now know
11904 it to be a binary operator. */
11905 switch (operator_code
)
11908 operator_code
= MULT_EXPR
;
11912 operator_code
= BIT_AND_EXPR
;
11915 case UNARY_PLUS_EXPR
:
11916 operator_code
= PLUS_EXPR
;
11920 operator_code
= MINUS_EXPR
;
11923 case PREINCREMENT_EXPR
:
11924 operator_code
= POSTINCREMENT_EXPR
;
11927 case PREDECREMENT_EXPR
:
11928 operator_code
= POSTDECREMENT_EXPR
;
11932 gcc_unreachable ();
11935 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11937 if ((operator_code
== POSTINCREMENT_EXPR
11938 || operator_code
== POSTDECREMENT_EXPR
)
11939 && ! processing_template_decl
11940 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11943 error ("postfix %qD must take %<int%> as its argument",
11946 error ("postfix %qD must take %<int%> as its second "
11954 error ("%qD must take either zero or one argument", decl
);
11956 error ("%qD must take either one or two arguments", decl
);
11960 /* More Effective C++ rule 6. */
11962 && (operator_code
== POSTINCREMENT_EXPR
11963 || operator_code
== POSTDECREMENT_EXPR
11964 || operator_code
== PREINCREMENT_EXPR
11965 || operator_code
== PREDECREMENT_EXPR
))
11967 tree arg
= TREE_VALUE (argtypes
);
11968 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11969 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11970 arg
= TREE_TYPE (arg
);
11971 arg
= TYPE_MAIN_VARIANT (arg
);
11972 if (operator_code
== PREINCREMENT_EXPR
11973 || operator_code
== PREDECREMENT_EXPR
)
11975 if (TREE_CODE (ret
) != REFERENCE_TYPE
11976 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11978 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11979 build_reference_type (arg
));
11983 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11984 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11988 else if (unary_op_p (operator_code
))
11993 error ("%qD must take %<void%>", decl
);
11995 error ("%qD must take exactly one argument", decl
);
11999 else /* if (binary_op_p (operator_code)) */
12004 error ("%qD must take exactly one argument", decl
);
12006 error ("%qD must take exactly two arguments", decl
);
12010 /* More Effective C++ rule 7. */
12012 && (operator_code
== TRUTH_ANDIF_EXPR
12013 || operator_code
== TRUTH_ORIF_EXPR
12014 || operator_code
== COMPOUND_EXPR
))
12015 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12019 /* Effective C++ rule 23. */
12022 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12023 && (operator_code
== PLUS_EXPR
12024 || operator_code
== MINUS_EXPR
12025 || operator_code
== TRUNC_DIV_EXPR
12026 || operator_code
== MULT_EXPR
12027 || operator_code
== TRUNC_MOD_EXPR
)
12028 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12029 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12031 /* [over.oper]/8 */
12032 for (; argtypes
&& argtypes
!= void_list_node
;
12033 argtypes
= TREE_CHAIN (argtypes
))
12034 if (TREE_PURPOSE (argtypes
))
12036 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12037 if (operator_code
== POSTINCREMENT_EXPR
12038 || operator_code
== POSTDECREMENT_EXPR
)
12040 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12045 error ("%qD cannot have default arguments", decl
);
12053 /* Return a string giving the keyword associate with CODE. */
12055 static const char *
12056 tag_name (enum tag_types code
)
12068 case typename_type
:
12071 gcc_unreachable ();
12075 /* Name lookup in an elaborated-type-specifier (after the keyword
12076 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12077 elaborated-type-specifier is invalid, issue a diagnostic and return
12078 error_mark_node; otherwise, return the *_TYPE to which it referred.
12079 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12082 check_elaborated_type_specifier (enum tag_types tag_code
,
12084 bool allow_template_p
)
12090 struct S { struct S *p; };
12092 name lookup will find the TYPE_DECL for the implicit "S::S"
12093 typedef. Adjust for that here. */
12094 if (DECL_SELF_REFERENCE_P (decl
))
12095 decl
= TYPE_NAME (TREE_TYPE (decl
));
12097 type
= TREE_TYPE (decl
);
12099 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12100 is false for this case as well. */
12101 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12103 error ("using template type parameter %qT after %qs",
12104 type
, tag_name (tag_code
));
12105 return error_mark_node
;
12107 /* Accept template template parameters. */
12108 else if (allow_template_p
12109 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12110 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12114 If the identifier resolves to a typedef-name or the
12115 simple-template-id resolves to an alias template
12116 specialization, the elaborated-type-specifier is ill-formed.
12118 In other words, the only legitimate declaration to use in the
12119 elaborated type specifier is the implicit typedef created when
12120 the type is declared. */
12121 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12122 && !DECL_SELF_REFERENCE_P (decl
)
12123 && tag_code
!= typename_type
)
12125 if (alias_template_specialization_p (type
))
12126 error ("using alias template specialization %qT after %qs",
12127 type
, tag_name (tag_code
));
12129 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12130 inform (DECL_SOURCE_LOCATION (decl
),
12131 "%qD has a previous declaration here", decl
);
12132 return error_mark_node
;
12134 else if (TREE_CODE (type
) != RECORD_TYPE
12135 && TREE_CODE (type
) != UNION_TYPE
12136 && tag_code
!= enum_type
12137 && tag_code
!= typename_type
)
12139 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12140 inform (input_location
, "%q+T has a previous declaration here", type
);
12141 return error_mark_node
;
12143 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12144 && tag_code
== enum_type
)
12146 error ("%qT referred to as enum", type
);
12147 inform (input_location
, "%q+T has a previous declaration here", type
);
12148 return error_mark_node
;
12150 else if (!allow_template_p
12151 && TREE_CODE (type
) == RECORD_TYPE
12152 && CLASSTYPE_IS_TEMPLATE (type
))
12154 /* If a class template appears as elaborated type specifier
12155 without a template header such as:
12157 template <class T> class C {};
12158 void f(class C); // No template header here
12160 then the required template argument is missing. */
12161 error ("template argument required for %<%s %T%>",
12162 tag_name (tag_code
),
12163 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12164 return error_mark_node
;
12170 /* Lookup NAME in elaborate type specifier in scope according to
12171 SCOPE and issue diagnostics if necessary.
12172 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12173 found, and ERROR_MARK_NODE for type error. */
12176 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12177 tag_scope scope
, bool template_header_p
)
12181 if (scope
== ts_global
)
12183 /* First try ordinary name lookup, ignoring hidden class name
12184 injected via friend declaration. */
12185 decl
= lookup_name_prefer_type (name
, 2);
12186 decl
= strip_using_decl (decl
);
12187 /* If that fails, the name will be placed in the smallest
12188 non-class, non-function-prototype scope according to 3.3.1/5.
12189 We may already have a hidden name declared as friend in this
12190 scope. So lookup again but not ignoring hidden names.
12191 If we find one, that name will be made visible rather than
12192 creating a new tag. */
12194 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12197 decl
= lookup_type_scope (name
, scope
);
12200 && (DECL_CLASS_TEMPLATE_P (decl
)
12201 /* If scope is ts_current we're defining a class, so ignore a
12202 template template parameter. */
12203 || (scope
!= ts_current
12204 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12205 decl
= DECL_TEMPLATE_RESULT (decl
);
12207 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12209 /* Look for invalid nested type:
12213 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12215 error ("%qD has the same name as the class in which it is "
12218 return error_mark_node
;
12221 /* Two cases we need to consider when deciding if a class
12222 template is allowed as an elaborated type specifier:
12223 1. It is a self reference to its own class.
12224 2. It comes with a template header.
12228 template <class T> class C {
12229 class C *c1; // DECL_SELF_REFERENCE_P is true
12232 template <class U> class C; // template_header_p is true
12233 template <class T> class C<T>::D {
12234 class C *c2; // DECL_SELF_REFERENCE_P is true
12237 t
= check_elaborated_type_specifier (tag_code
,
12240 | DECL_SELF_REFERENCE_P (decl
));
12243 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12245 error ("reference to %qD is ambiguous", name
);
12246 print_candidates (decl
);
12247 return error_mark_node
;
12253 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12254 Define the tag as a forward-reference if it is not defined.
12256 If a declaration is given, process it here, and report an error if
12257 multiple declarations are not identical.
12259 SCOPE is TS_CURRENT when this is also a definition. Only look in
12260 the current frame for the name (since C++ allows new names in any
12261 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12262 declaration. Only look beginning from the current scope outward up
12263 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12265 TEMPLATE_HEADER_P is true when this declaration is preceded by
12266 a set of template parameters. */
12269 xref_tag_1 (enum tag_types tag_code
, tree name
,
12270 tag_scope orig_scope
, bool template_header_p
)
12272 enum tree_code code
;
12274 tree context
= NULL_TREE
;
12277 gcc_assert (identifier_p (name
));
12283 code
= RECORD_TYPE
;
12289 code
= ENUMERAL_TYPE
;
12292 gcc_unreachable ();
12295 if (orig_scope
== ts_lambda
)
12296 scope
= ts_current
;
12298 scope
= orig_scope
;
12300 /* In case of anonymous name, xref_tag is only called to
12301 make type node and push name. Name lookup is not required. */
12302 if (anon_aggrname_p (name
))
12305 t
= lookup_and_check_tag (tag_code
, name
,
12306 scope
, template_header_p
);
12308 if (t
== error_mark_node
)
12309 return error_mark_node
;
12311 if (scope
!= ts_current
&& t
&& current_class_type
12312 && template_class_depth (current_class_type
)
12313 && template_header_p
)
12315 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12318 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12319 definition of this tag. Since, in addition, we are currently
12320 processing a (member) template declaration of a template
12321 class, we must be very careful; consider:
12328 { template <class V>
12329 friend struct S1; };
12331 Here, the S2::S1 declaration should not be confused with the
12332 outer declaration. In particular, the inner version should
12333 have a template parameter of level 2, not level 1. This
12334 would be particularly important if the member declaration
12337 template <class V = U> friend struct S1;
12339 say, when we should tsubst into `U' when instantiating
12340 S2. On the other hand, when presented with:
12350 we must find the inner binding eventually. We
12351 accomplish this by making sure that the new type we
12352 create to represent this declaration has the right
12354 context
= TYPE_CONTEXT (t
);
12360 /* If no such tag is yet defined, create a forward-reference node
12361 and record it as the "definition".
12362 When a real declaration of this type is found,
12363 the forward-reference will be altered into a real type. */
12364 if (code
== ENUMERAL_TYPE
)
12366 error ("use of enum %q#D without previous declaration", name
);
12367 return error_mark_node
;
12371 t
= make_class_type (code
);
12372 TYPE_CONTEXT (t
) = context
;
12373 if (orig_scope
== ts_lambda
)
12374 /* Remember that we're declaring a lambda to avoid bogus errors
12375 in push_template_decl. */
12376 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12377 t
= pushtag (name
, t
, scope
);
12382 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12384 if (!redeclare_class_template (t
, current_template_parms
))
12385 return error_mark_node
;
12387 else if (!processing_template_decl
12388 && CLASS_TYPE_P (t
)
12389 && CLASSTYPE_IS_TEMPLATE (t
))
12391 error ("redeclaration of %qT as a non-template", t
);
12392 error ("previous declaration %q+D", t
);
12393 return error_mark_node
;
12396 /* Make injected friend class visible. */
12397 if (scope
!= ts_within_enclosing_non_class
12398 && hidden_name_p (TYPE_NAME (t
)))
12400 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12401 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12403 if (TYPE_TEMPLATE_INFO (t
))
12405 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12406 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12414 /* Wrapper for xref_tag_1. */
12417 xref_tag (enum tag_types tag_code
, tree name
,
12418 tag_scope scope
, bool template_header_p
)
12422 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12423 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12424 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12430 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12432 enum tag_types tag_kind
;
12434 if (TREE_CODE (old
) == RECORD_TYPE
)
12435 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12437 tag_kind
= union_type
;
12439 if (id
== NULL_TREE
)
12440 id
= TYPE_IDENTIFIER (old
);
12442 return xref_tag (tag_kind
, id
, scope
, false);
12445 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12446 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12447 access_* node, and the TREE_VALUE is the type of the base-class.
12448 Non-NULL TREE_TYPE indicates virtual inheritance.
12450 Returns true if the binfo hierarchy was successfully created,
12451 false if an error was detected. */
12454 xref_basetypes (tree ref
, tree base_list
)
12457 tree binfo
, base_binfo
;
12458 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12459 unsigned max_bases
= 0; /* Maximum direct bases. */
12461 tree default_access
;
12462 tree igo_prev
; /* Track Inheritance Graph Order. */
12464 if (ref
== error_mark_node
)
12467 /* The base of a derived class is private by default, all others are
12469 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12470 && CLASSTYPE_DECLARED_CLASS (ref
)
12471 ? access_private_node
: access_public_node
);
12473 /* First, make sure that any templates in base-classes are
12474 instantiated. This ensures that if we call ourselves recursively
12475 we do not get confused about which classes are marked and which
12477 basep
= &base_list
;
12480 tree basetype
= TREE_VALUE (*basep
);
12482 /* The dependent_type_p call below should really be dependent_scope_p
12483 so that we give a hard error about using an incomplete type as a
12484 base, but we allow it with a pedwarn for backward
12486 if (processing_template_decl
12487 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12488 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12489 if (!dependent_type_p (basetype
)
12490 && !complete_type_or_else (basetype
, NULL
))
12491 /* An incomplete type. Remove it from the list. */
12492 *basep
= TREE_CHAIN (*basep
);
12496 if (TREE_TYPE (*basep
))
12498 if (CLASS_TYPE_P (basetype
))
12499 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12500 basep
= &TREE_CHAIN (*basep
);
12504 TYPE_MARKED_P (ref
) = 1;
12506 /* The binfo slot should be empty, unless this is an (ill-formed)
12508 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12510 error ("redefinition of %q#T", ref
);
12514 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12516 binfo
= make_tree_binfo (max_bases
);
12518 TYPE_BINFO (ref
) = binfo
;
12519 BINFO_OFFSET (binfo
) = size_zero_node
;
12520 BINFO_TYPE (binfo
) = ref
;
12522 /* Apply base-class info set up to the variants of this type. */
12523 fixup_type_variants (ref
);
12527 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12528 /* An aggregate cannot have baseclasses. */
12529 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12531 if (TREE_CODE (ref
) == UNION_TYPE
)
12533 error ("derived union %qT invalid", ref
);
12540 if (TYPE_FOR_JAVA (ref
))
12542 error ("Java class %qT cannot have multiple bases", ref
);
12549 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12551 if (TYPE_FOR_JAVA (ref
))
12553 error ("Java class %qT cannot have virtual bases", ref
);
12558 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12560 tree access
= TREE_PURPOSE (base_list
);
12561 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12562 tree basetype
= TREE_VALUE (base_list
);
12564 if (access
== access_default_node
)
12565 access
= default_access
;
12567 if (PACK_EXPANSION_P (basetype
))
12568 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12569 if (TREE_CODE (basetype
) == TYPE_DECL
)
12570 basetype
= TREE_TYPE (basetype
);
12571 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12573 error ("base type %qT fails to be a struct or class type",
12578 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12579 TYPE_FOR_JAVA (ref
) = 1;
12581 base_binfo
= NULL_TREE
;
12582 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12584 base_binfo
= TYPE_BINFO (basetype
);
12585 /* The original basetype could have been a typedef'd type. */
12586 basetype
= BINFO_TYPE (base_binfo
);
12588 /* Inherit flags from the base. */
12589 TYPE_HAS_NEW_OPERATOR (ref
)
12590 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12591 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12592 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12593 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12594 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12595 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12596 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12597 CLASSTYPE_REPEATED_BASE_P (ref
)
12598 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12601 /* We must do this test after we've seen through a typedef
12603 if (TYPE_MARKED_P (basetype
))
12605 if (basetype
== ref
)
12606 error ("recursive type %qT undefined", basetype
);
12608 error ("duplicate base type %qT invalid", basetype
);
12612 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12613 /* Regenerate the pack expansion for the bases. */
12614 basetype
= make_pack_expansion (basetype
);
12616 TYPE_MARKED_P (basetype
) = 1;
12618 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12619 &igo_prev
, via_virtual
);
12620 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12621 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12623 BINFO_BASE_APPEND (binfo
, base_binfo
);
12624 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12627 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12628 /* If we didn't get max_vbases vbases, we must have shared at
12629 least one of them, and are therefore diamond shaped. */
12630 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12632 /* Unmark all the types. */
12633 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12634 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12635 TYPE_MARKED_P (ref
) = 0;
12637 /* Now see if we have a repeated base type. */
12638 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12640 for (base_binfo
= binfo
; base_binfo
;
12641 base_binfo
= TREE_CHAIN (base_binfo
))
12643 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12645 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12648 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12650 for (base_binfo
= binfo
; base_binfo
;
12651 base_binfo
= TREE_CHAIN (base_binfo
))
12652 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12653 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12662 /* Copies the enum-related properties from type SRC to type DST.
12663 Used with the underlying type of an enum and the enum itself. */
12665 copy_type_enum (tree dst
, tree src
)
12668 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12670 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12671 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12672 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12673 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12674 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12675 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12676 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12677 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12678 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12682 /* Begin compiling the definition of an enumeration type.
12685 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12687 UNDERLYING_TYPE is the type that will be used as the storage for
12688 the enumeration type. This should be NULL_TREE if no storage type
12691 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12693 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12695 Returns the type object, as yet incomplete.
12696 Also records info about it so that build_enumerator
12697 may be used to declare the individual values as they are read. */
12700 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12701 bool scoped_enum_p
, bool *is_new
)
12703 tree prevtype
= NULL_TREE
;
12704 gcc_assert (identifier_p (name
));
12708 /* [C++0x dcl.enum]p5:
12710 If not explicitly specified, the underlying type of a scoped
12711 enumeration type is int. */
12712 if (!underlying_type
&& scoped_enum_p
)
12713 underlying_type
= integer_type_node
;
12715 if (underlying_type
)
12716 underlying_type
= cv_unqualified (underlying_type
);
12718 /* If this is the real definition for a previous forward reference,
12719 fill in the contents in the same object that used to be the
12720 forward reference. */
12722 enumtype
= lookup_and_check_tag (enum_type
, name
,
12723 /*tag_scope=*/ts_current
,
12724 /*template_header_p=*/false);
12726 /* In case of a template_decl, the only check that should be deferred
12727 to instantiation time is the comparison of underlying types. */
12728 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12730 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12732 error_at (input_location
, "scoped/unscoped mismatch "
12733 "in enum %q#T", enumtype
);
12734 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12735 "previous definition here");
12736 enumtype
= error_mark_node
;
12738 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12740 error_at (input_location
, "underlying type mismatch "
12741 "in enum %q#T", enumtype
);
12742 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12743 "previous definition here");
12744 enumtype
= error_mark_node
;
12746 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12747 && !dependent_type_p (underlying_type
)
12748 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12749 && !same_type_p (underlying_type
,
12750 ENUM_UNDERLYING_TYPE (enumtype
)))
12752 error_at (input_location
, "different underlying type "
12753 "in enum %q#T", enumtype
);
12754 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12755 "previous definition here");
12756 underlying_type
= NULL_TREE
;
12760 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12761 || processing_template_decl
)
12763 /* In case of error, make a dummy enum to allow parsing to
12765 if (enumtype
== error_mark_node
)
12767 name
= make_anon_name ();
12768 enumtype
= NULL_TREE
;
12771 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12772 of an opaque enum, or an opaque enum of an already defined
12773 enumeration (C++0x only).
12774 In any other case, it'll be NULL_TREE. */
12780 prevtype
= enumtype
;
12782 /* Do not push the decl more than once, unless we need to
12783 compare underlying types at instantiation time */
12785 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12786 || (underlying_type
12787 && dependent_type_p (underlying_type
))
12788 || (ENUM_UNDERLYING_TYPE (enumtype
)
12789 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12791 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12792 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12795 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12798 if (enumtype
== error_mark_node
)
12799 return error_mark_node
;
12801 /* The enum is considered opaque until the opening '{' of the
12802 enumerator list. */
12803 SET_OPAQUE_ENUM_P (enumtype
, true);
12804 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12807 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12809 if (underlying_type
)
12811 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12813 copy_type_enum (enumtype
, underlying_type
);
12814 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12816 else if (dependent_type_p (underlying_type
))
12817 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12819 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12820 underlying_type
, enumtype
);
12823 /* If into a template class, the returned enum is always the first
12824 declaration (opaque or not) seen. This way all the references to
12825 this type will be to the same declaration. The following ones are used
12826 only to check for definition errors. */
12827 if (prevtype
&& processing_template_decl
)
12833 /* After processing and defining all the values of an enumeration type,
12834 install their decls in the enumeration type.
12835 ENUMTYPE is the type object. */
12838 finish_enum_value_list (tree enumtype
)
12841 tree underlying_type
;
12844 tree minnode
, maxnode
;
12847 bool fixed_underlying_type_p
12848 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12850 /* We built up the VALUES in reverse order. */
12851 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12853 /* For an enum defined in a template, just set the type of the values;
12854 all further processing is postponed until the template is
12855 instantiated. We need to set the type so that tsubst of a CONST_DECL
12857 if (processing_template_decl
)
12859 for (values
= TYPE_VALUES (enumtype
);
12861 values
= TREE_CHAIN (values
))
12862 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12866 /* Determine the minimum and maximum values of the enumerators. */
12867 if (TYPE_VALUES (enumtype
))
12869 minnode
= maxnode
= NULL_TREE
;
12871 for (values
= TYPE_VALUES (enumtype
);
12873 values
= TREE_CHAIN (values
))
12875 decl
= TREE_VALUE (values
);
12877 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12878 each enumerator has the type of its enumeration. Prior to the
12879 closing brace, the type of each enumerator is the type of its
12880 initializing value. */
12881 TREE_TYPE (decl
) = enumtype
;
12883 /* Update the minimum and maximum values, if appropriate. */
12884 value
= DECL_INITIAL (decl
);
12885 if (value
== error_mark_node
)
12886 value
= integer_zero_node
;
12887 /* Figure out what the minimum and maximum values of the
12888 enumerators are. */
12890 minnode
= maxnode
= value
;
12891 else if (tree_int_cst_lt (maxnode
, value
))
12893 else if (tree_int_cst_lt (value
, minnode
))
12900 If the enumerator-list is empty, the underlying type is as if
12901 the enumeration had a single enumerator with value 0. */
12902 minnode
= maxnode
= integer_zero_node
;
12904 if (!fixed_underlying_type_p
)
12906 /* Compute the number of bits require to represent all values of the
12907 enumeration. We must do this before the type of MINNODE and
12908 MAXNODE are transformed, since tree_int_cst_min_precision relies
12909 on the TREE_TYPE of the value it is passed. */
12910 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12911 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12912 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12913 int precision
= MAX (lowprec
, highprec
);
12915 bool use_short_enum
;
12917 /* Determine the underlying type of the enumeration.
12921 The underlying type of an enumeration is an integral type that
12922 can represent all the enumerator values defined in the
12923 enumeration. It is implementation-defined which integral type is
12924 used as the underlying type for an enumeration except that the
12925 underlying type shall not be larger than int unless the value of
12926 an enumerator cannot fit in an int or unsigned int.
12928 We use "int" or an "unsigned int" as the underlying type, even if
12929 a smaller integral type would work, unless the user has
12930 explicitly requested that we use the smallest possible type. The
12931 user can request that for all enumerations with a command line
12932 flag, or for just one enumeration with an attribute. */
12934 use_short_enum
= flag_short_enums
12935 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12937 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12941 underlying_type
= integer_types
[itk
];
12942 if (underlying_type
!= NULL_TREE
12943 && TYPE_PRECISION (underlying_type
) >= precision
12944 && TYPE_SIGN (underlying_type
) == sgn
)
12947 if (itk
== itk_none
)
12951 IF no integral type can represent all the enumerator values, the
12952 enumeration is ill-formed. */
12953 error ("no integral type can represent all of the enumerator values "
12954 "for %qT", enumtype
);
12955 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12956 underlying_type
= integer_types
[itk_unsigned_long_long
];
12961 The value of sizeof() applied to an enumeration type, an object
12962 of an enumeration type, or an enumerator, is the value of sizeof()
12963 applied to the underlying type. */
12964 copy_type_enum (enumtype
, underlying_type
);
12966 /* Compute the minimum and maximum values for the type.
12970 For an enumeration where emin is the smallest enumerator and emax
12971 is the largest, the values of the enumeration are the values of the
12972 underlying type in the range bmin to bmax, where bmin and bmax are,
12973 respectively, the smallest and largest values of the smallest bit-
12974 field that can store emin and emax. */
12976 /* The middle-end currently assumes that types with TYPE_PRECISION
12977 narrower than their underlying type are suitably zero or sign
12978 extended to fill their mode. Similarly, it assumes that the front
12979 end assures that a value of a particular type must be within
12980 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12982 We used to set these fields based on bmin and bmax, but that led
12983 to invalid assumptions like optimizing away bounds checking. So
12984 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12985 TYPE_MAX_VALUE to the values for the mode above and only restrict
12986 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12987 ENUM_UNDERLYING_TYPE (enumtype
)
12988 = build_distinct_type_copy (underlying_type
);
12989 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12990 set_min_and_max_values_for_integral_type
12991 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12993 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12994 if (flag_strict_enums
)
12995 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12998 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
13000 /* Convert each of the enumerators to the type of the underlying
13001 type of the enumeration. */
13002 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
13004 location_t saved_location
;
13006 decl
= TREE_VALUE (values
);
13007 saved_location
= input_location
;
13008 input_location
= DECL_SOURCE_LOCATION (decl
);
13009 if (fixed_underlying_type_p
)
13010 /* If the enumeration type has a fixed underlying type, we
13011 already checked all of the enumerator values. */
13012 value
= DECL_INITIAL (decl
);
13014 value
= perform_implicit_conversion (underlying_type
,
13015 DECL_INITIAL (decl
),
13016 tf_warning_or_error
);
13017 input_location
= saved_location
;
13019 /* Do not clobber shared ints. */
13020 value
= copy_node (value
);
13022 TREE_TYPE (value
) = enumtype
;
13023 DECL_INITIAL (decl
) = value
;
13026 /* Fix up all variant types of this enum type. */
13027 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13028 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13030 if (at_class_scope_p ()
13031 && COMPLETE_TYPE_P (current_class_type
)
13032 && UNSCOPED_ENUM_P (enumtype
))
13033 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13034 current_class_type
);
13036 /* Finish debugging output for this type. */
13037 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13040 /* Finishes the enum type. This is called only the first time an
13041 enumeration is seen, be it opaque or odinary.
13042 ENUMTYPE is the type object. */
13045 finish_enum (tree enumtype
)
13047 if (processing_template_decl
)
13049 if (at_function_scope_p ())
13050 add_stmt (build_min (TAG_DEFN
, enumtype
));
13054 /* If this is a forward declaration, there should not be any variants,
13055 though we can get a variant in the middle of an enum-specifier with
13056 wacky code like 'enum E { e = sizeof(const E*) };' */
13057 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13058 && (TYPE_VALUES (enumtype
)
13059 || !TYPE_NEXT_VARIANT (enumtype
)));
13062 /* Build and install a CONST_DECL for an enumeration constant of the
13063 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13064 Apply ATTRIBUTES if available. LOC is the location of NAME.
13065 Assignment of sequential values by default is handled here. */
13068 build_enumerator (tree name
, tree value
, tree enumtype
, tree attributes
,
13075 /* scalar_constant_value will pull out this expression, so make sure
13076 it's folded as appropriate. */
13077 if (processing_template_decl
)
13078 value
= fold_non_dependent_expr (value
);
13080 /* If the VALUE was erroneous, pretend it wasn't there; that will
13081 result in the enum being assigned the next value in sequence. */
13082 if (value
== error_mark_node
)
13085 /* Remove no-op casts from the value. */
13087 STRIP_TYPE_NOPS (value
);
13089 if (! processing_template_decl
)
13091 /* Validate and default VALUE. */
13092 if (value
!= NULL_TREE
)
13094 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13096 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13101 else if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
13102 (TREE_TYPE (value
)))
13103 value
= perform_implicit_conversion_flags
13104 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13105 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13107 if (value
== error_mark_node
)
13110 if (value
!= NULL_TREE
)
13112 value
= cxx_constant_value (value
);
13114 if (TREE_CODE (value
) != INTEGER_CST
13115 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13117 error ("enumerator value for %qD is not an integer constant",
13124 /* Default based on previous value. */
13125 if (value
== NULL_TREE
)
13127 if (TYPE_VALUES (enumtype
))
13132 /* C++03 7.2/4: If no initializer is specified for the first
13133 enumerator, the type is an unspecified integral
13134 type. Otherwise the type is the same as the type of the
13135 initializing value of the preceding enumerator unless the
13136 incremented value is not representable in that type, in
13137 which case the type is an unspecified integral type
13138 sufficient to contain the incremented value. */
13139 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13140 if (error_operand_p (prev_value
))
13141 value
= error_mark_node
;
13144 tree type
= TREE_TYPE (prev_value
);
13145 signop sgn
= TYPE_SIGN (type
);
13146 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13150 bool pos
= !wi::neg_p (wi
, sgn
);
13151 if (!wi::fits_to_tree_p (wi
, type
))
13154 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13156 type
= integer_types
[itk
];
13157 if (type
!= NULL_TREE
13158 && (pos
|| !TYPE_UNSIGNED (type
))
13159 && wi::fits_to_tree_p (wi
, type
))
13162 if (type
&& cxx_dialect
< cxx11
13163 && itk
> itk_unsigned_long
)
13164 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13165 incremented enumerator value is too large for %<unsigned long%>" : "\
13166 incremented enumerator value is too large for %<long%>");
13168 if (type
== NULL_TREE
)
13171 value
= wide_int_to_tree (type
, wi
);
13176 error ("overflow in enumeration values at %qD", name
);
13177 value
= error_mark_node
;
13182 value
= integer_zero_node
;
13185 /* Remove no-op casts from the value. */
13186 STRIP_TYPE_NOPS (value
);
13188 /* If the underlying type of the enum is fixed, check whether
13189 the enumerator values fits in the underlying type. If it
13190 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13191 if (ENUM_UNDERLYING_TYPE (enumtype
)
13193 && TREE_CODE (value
) == INTEGER_CST
)
13195 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13196 error ("enumerator value %E is outside the range of underlying "
13197 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13199 /* Convert the value to the appropriate type. */
13200 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13204 /* C++ associates enums with global, function, or class declarations. */
13205 context
= current_scope ();
13207 /* Build the actual enumeration constant. Note that the enumeration
13208 constants have the underlying type of the enum (if it is fixed)
13209 or the type of their initializer (if the underlying type of the
13210 enum is not fixed):
13214 If the underlying type is fixed, the type of each enumerator
13215 prior to the closing brace is the underlying type; if the
13216 initializing value of an enumerator cannot be represented by
13217 the underlying type, the program is ill-formed. If the
13218 underlying type is not fixed, the type of each enumerator is
13219 the type of its initializing value.
13221 If the underlying type is not fixed, it will be computed by
13222 finish_enum and we will reset the type of this enumerator. Of
13223 course, if we're processing a template, there may be no value. */
13224 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13226 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13228 DECL_CONTEXT (decl
) = enumtype
;
13229 TREE_CONSTANT (decl
) = 1;
13230 TREE_READONLY (decl
) = 1;
13231 DECL_INITIAL (decl
) = value
;
13234 cplus_decl_attributes (&decl
, attributes
, 0);
13236 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13237 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13238 on the TYPE_FIELDS list for `S'. (That's so that you can say
13239 things like `S::i' later.) */
13240 finish_member_declaration (decl
);
13244 /* Add this enumeration constant to the list for this type. */
13245 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13248 /* Look for an enumerator with the given NAME within the enumeration
13249 type ENUMTYPE. This routine is used primarily for qualified name
13250 lookup into an enumerator in C++0x, e.g.,
13252 enum class Color { Red, Green, Blue };
13254 Color color = Color::Red;
13256 Returns the value corresponding to the enumerator, or
13257 NULL_TREE if no such enumerator was found. */
13259 lookup_enumerator (tree enumtype
, tree name
)
13262 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13264 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13265 return e
? TREE_VALUE (e
) : NULL_TREE
;
13269 /* We're defining DECL. Make sure that its type is OK. */
13272 check_function_type (tree decl
, tree current_function_parms
)
13274 tree fntype
= TREE_TYPE (decl
);
13275 tree return_type
= complete_type (TREE_TYPE (fntype
));
13277 /* In a function definition, arg types must be complete. */
13278 require_complete_types_for_parms (current_function_parms
);
13280 if (dependent_type_p (return_type
)
13281 || type_uses_auto (return_type
))
13283 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13284 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13286 tree args
= TYPE_ARG_TYPES (fntype
);
13288 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13289 error ("return type %q#T is incomplete", return_type
);
13291 error ("return type has Java class type %q#T", return_type
);
13293 /* Make it return void instead. */
13294 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13295 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13297 TREE_CHAIN (args
));
13299 fntype
= build_function_type (void_type_node
, args
);
13301 = build_exception_variant (fntype
,
13302 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13303 fntype
= (cp_build_type_attribute_variant
13304 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13305 TREE_TYPE (decl
) = fntype
;
13308 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13311 /* Create the FUNCTION_DECL for a function definition.
13312 DECLSPECS and DECLARATOR are the parts of the declaration;
13313 they describe the function's name and the type it returns,
13314 but twisted together in a fashion that parallels the syntax of C.
13316 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13317 DECLARATOR is really the DECL for the function we are about to
13318 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13319 indicating that the function is an inline defined in-class.
13321 This function creates a binding context for the function body
13322 as well as setting up the FUNCTION_DECL in current_function_decl.
13324 For C++, we must first check whether that datum makes any sense.
13325 For example, "class A local_a(1,2);" means that variable local_a
13326 is an aggregate of type A, which should have a constructor
13327 applied to it with the argument list [1, 2].
13329 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13330 or may be a BLOCK if the function has been defined previously
13331 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13332 error_mark_node if the function has never been defined, or
13333 a BLOCK if the function has been defined somewhere. */
13336 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13338 tree ctype
= NULL_TREE
;
13341 int doing_friend
= 0;
13342 cp_binding_level
*bl
;
13343 tree current_function_parms
;
13344 struct c_fileinfo
*finfo
13345 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13346 bool honor_interface
;
13348 /* Sanity check. */
13349 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13350 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13352 fntype
= TREE_TYPE (decl1
);
13353 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13354 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13356 /* ISO C++ 11.4/5. A friend function defined in a class is in
13357 the (lexical) scope of the class in which it is defined. */
13358 if (!ctype
&& DECL_FRIEND_P (decl1
))
13360 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13362 /* CTYPE could be null here if we're dealing with a template;
13363 for example, `inline friend float foo()' inside a template
13364 will have no CTYPE set. */
13365 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13371 if (DECL_DECLARED_INLINE_P (decl1
)
13372 && lookup_attribute ("noinline", attrs
))
13373 warning (0, "inline function %q+D given attribute noinline", decl1
);
13375 /* Handle gnu_inline attribute. */
13376 if (GNU_INLINE_P (decl1
))
13378 DECL_EXTERNAL (decl1
) = 1;
13379 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13380 DECL_INTERFACE_KNOWN (decl1
) = 1;
13381 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13384 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13385 /* This is a constructor, we must ensure that any default args
13386 introduced by this definition are propagated to the clones
13387 now. The clones are used directly in overload resolution. */
13388 adjust_clone_args (decl1
);
13390 /* Sometimes we don't notice that a function is a static member, and
13391 build a METHOD_TYPE for it. Fix that up now. */
13392 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13393 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13395 /* Set up current_class_type, and enter the scope of the class, if
13398 push_nested_class (ctype
);
13399 else if (DECL_STATIC_FUNCTION_P (decl1
))
13400 push_nested_class (DECL_CONTEXT (decl1
));
13402 /* Now that we have entered the scope of the class, we must restore
13403 the bindings for any template parameters surrounding DECL1, if it
13404 is an inline member template. (Order is important; consider the
13405 case where a template parameter has the same name as a field of
13406 the class.) It is not until after this point that
13407 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13408 if (flags
& SF_INCLASS_INLINE
)
13409 maybe_begin_member_template_processing (decl1
);
13411 /* Effective C++ rule 15. */
13413 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13414 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13415 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13417 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13418 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13419 if (!DECL_INITIAL (decl1
))
13420 DECL_INITIAL (decl1
) = error_mark_node
;
13422 /* This function exists in static storage.
13423 (This does not mean `static' in the C sense!) */
13424 TREE_STATIC (decl1
) = 1;
13426 /* We must call push_template_decl after current_class_type is set
13427 up. (If we are processing inline definitions after exiting a
13428 class scope, current_class_type will be NULL_TREE until set above
13429 by push_nested_class.) */
13430 if (processing_template_decl
)
13432 tree newdecl1
= push_template_decl (decl1
);
13433 if (newdecl1
== error_mark_node
)
13435 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13436 pop_nested_class ();
13442 /* We are now in the scope of the function being defined. */
13443 current_function_decl
= decl1
;
13445 /* Save the parm names or decls from this function's declarator
13446 where store_parm_decls will find them. */
13447 current_function_parms
= DECL_ARGUMENTS (decl1
);
13449 /* Make sure the parameter and return types are reasonable. When
13450 you declare a function, these types can be incomplete, but they
13451 must be complete when you define the function. */
13452 check_function_type (decl1
, current_function_parms
);
13454 /* Build the return declaration for the function. */
13455 restype
= TREE_TYPE (fntype
);
13457 if (DECL_RESULT (decl1
) == NULL_TREE
)
13461 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13462 DECL_ARTIFICIAL (resdecl
) = 1;
13463 DECL_IGNORED_P (resdecl
) = 1;
13464 DECL_RESULT (decl1
) = resdecl
;
13466 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13469 /* Let the user know we're compiling this function. */
13470 announce_function (decl1
);
13472 /* Record the decl so that the function name is defined.
13473 If we already have a decl for this name, and it is a FUNCTION_DECL,
13474 use the old decl. */
13475 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13477 /* A specialization is not used to guide overload resolution. */
13478 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13479 && !(DECL_USE_TEMPLATE (decl1
) &&
13480 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13482 tree olddecl
= pushdecl (decl1
);
13484 if (olddecl
== error_mark_node
)
13485 /* If something went wrong when registering the declaration,
13486 use DECL1; we have to have a FUNCTION_DECL to use when
13487 parsing the body of the function. */
13491 /* Otherwise, OLDDECL is either a previous declaration
13492 of the same function or DECL1 itself. */
13494 if (warn_missing_declarations
13495 && olddecl
== decl1
13496 && !DECL_MAIN_P (decl1
)
13497 && TREE_PUBLIC (decl1
)
13498 && !DECL_DECLARED_INLINE_P (decl1
))
13502 /* Check whether DECL1 is in an anonymous
13504 for (context
= DECL_CONTEXT (decl1
);
13506 context
= DECL_CONTEXT (context
))
13508 if (TREE_CODE (context
) == NAMESPACE_DECL
13509 && DECL_NAME (context
) == NULL_TREE
)
13513 if (context
== NULL
)
13514 warning (OPT_Wmissing_declarations
,
13515 "no previous declaration for %q+D", decl1
);
13523 /* We need to set the DECL_CONTEXT. */
13524 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13525 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13527 fntype
= TREE_TYPE (decl1
);
13528 restype
= TREE_TYPE (fntype
);
13530 /* If #pragma weak applies, mark the decl appropriately now.
13531 The pragma only applies to global functions. Because
13532 determining whether or not the #pragma applies involves
13533 computing the mangled name for the declaration, we cannot
13534 apply the pragma until after we have merged this declaration
13535 with any previous declarations; if the original declaration
13536 has a linkage specification, that specification applies to
13537 the definition as well, and may affect the mangled name. */
13538 if (DECL_FILE_SCOPE_P (decl1
))
13539 maybe_apply_pragma_weak (decl1
);
13542 /* Reset this in case the call to pushdecl changed it. */
13543 current_function_decl
= decl1
;
13545 gcc_assert (DECL_INITIAL (decl1
));
13547 /* This function may already have been parsed, in which case just
13548 return; our caller will skip over the body without parsing. */
13549 if (DECL_INITIAL (decl1
) != error_mark_node
)
13552 /* Initialize RTL machinery. We cannot do this until
13553 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13554 even when processing a template; this is how we get
13555 CFUN set up, and our per-function variables initialized.
13556 FIXME factor out the non-RTL stuff. */
13557 bl
= current_binding_level
;
13558 allocate_struct_function (decl1
, processing_template_decl
);
13560 /* Initialize the language data structures. Whenever we start
13561 a new function, we destroy temporaries in the usual way. */
13562 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13563 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13564 current_binding_level
= bl
;
13566 if (!processing_template_decl
&& type_uses_auto (restype
))
13568 FNDECL_USED_AUTO (decl1
) = true;
13569 current_function_auto_return_pattern
= restype
;
13572 /* Start the statement-tree, start the tree now. */
13573 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13575 /* If we are (erroneously) defining a function that we have already
13576 defined before, wipe out what we knew before. */
13577 if (!DECL_PENDING_INLINE_P (decl1
))
13578 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13580 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13582 /* We know that this was set up by `grokclassfn'. We do not
13583 wait until `store_parm_decls', since evil parse errors may
13584 never get us to that point. Here we keep the consistency
13585 between `current_class_type' and `current_class_ptr'. */
13586 tree t
= DECL_ARGUMENTS (decl1
);
13588 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13589 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13591 cp_function_chain
->x_current_class_ref
13592 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13593 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13594 cp_function_chain
->x_current_class_ptr
= t
;
13596 /* Constructors and destructors need to know whether they're "in
13597 charge" of initializing virtual base classes. */
13598 t
= DECL_CHAIN (t
);
13599 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13601 current_in_charge_parm
= t
;
13602 t
= DECL_CHAIN (t
);
13604 if (DECL_HAS_VTT_PARM_P (decl1
))
13606 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13607 current_vtt_parm
= t
;
13611 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13612 /* Implicitly-defined methods (like the
13613 destructor for a class in which no destructor
13614 is explicitly declared) must not be defined
13615 until their definition is needed. So, we
13616 ignore interface specifications for
13617 compiler-generated functions. */
13618 && !DECL_ARTIFICIAL (decl1
));
13620 if (processing_template_decl
)
13621 /* Don't mess with interface flags. */;
13622 else if (DECL_INTERFACE_KNOWN (decl1
))
13624 tree ctx
= decl_function_context (decl1
);
13626 if (DECL_NOT_REALLY_EXTERN (decl1
))
13627 DECL_EXTERNAL (decl1
) = 0;
13629 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13630 /* This is a function in a local class in an extern inline
13631 or template function. */
13632 comdat_linkage (decl1
);
13634 /* If this function belongs to an interface, it is public.
13635 If it belongs to someone else's interface, it is also external.
13636 This only affects inlines and template instantiations. */
13637 else if (!finfo
->interface_unknown
&& honor_interface
)
13639 if (DECL_DECLARED_INLINE_P (decl1
)
13640 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13642 DECL_EXTERNAL (decl1
)
13643 = (finfo
->interface_only
13644 || (DECL_DECLARED_INLINE_P (decl1
)
13645 && ! flag_implement_inlines
13646 && !DECL_VINDEX (decl1
)));
13648 /* For WIN32 we also want to put these in linkonce sections. */
13649 maybe_make_one_only (decl1
);
13652 DECL_EXTERNAL (decl1
) = 0;
13653 DECL_INTERFACE_KNOWN (decl1
) = 1;
13654 /* If this function is in an interface implemented in this file,
13655 make sure that the back end knows to emit this function
13657 if (!DECL_EXTERNAL (decl1
))
13658 mark_needed (decl1
);
13660 else if (finfo
->interface_unknown
&& finfo
->interface_only
13661 && honor_interface
)
13663 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13664 interface, we will have both finfo->interface_unknown and
13665 finfo->interface_only set. In that case, we don't want to
13666 use the normal heuristics because someone will supply a
13667 #pragma implementation elsewhere, and deducing it here would
13668 produce a conflict. */
13669 comdat_linkage (decl1
);
13670 DECL_EXTERNAL (decl1
) = 0;
13671 DECL_INTERFACE_KNOWN (decl1
) = 1;
13672 DECL_DEFER_OUTPUT (decl1
) = 1;
13676 /* This is a definition, not a reference.
13677 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13678 if (!GNU_INLINE_P (decl1
))
13679 DECL_EXTERNAL (decl1
) = 0;
13681 if ((DECL_DECLARED_INLINE_P (decl1
)
13682 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13683 && ! DECL_INTERFACE_KNOWN (decl1
))
13684 DECL_DEFER_OUTPUT (decl1
) = 1;
13686 DECL_INTERFACE_KNOWN (decl1
) = 1;
13689 /* Determine the ELF visibility attribute for the function. We must not
13690 do this before calling "pushdecl", as we must allow "duplicate_decls"
13691 to merge any attributes appropriately. We also need to wait until
13693 if (!DECL_CLONED_FUNCTION_P (decl1
))
13694 determine_visibility (decl1
);
13696 if (!processing_template_decl
)
13697 maybe_instantiate_noexcept (decl1
);
13699 begin_scope (sk_function_parms
, decl1
);
13703 if (DECL_DESTRUCTOR_P (decl1
)
13704 || (DECL_CONSTRUCTOR_P (decl1
)
13705 && targetm
.cxx
.cdtor_returns_this ()))
13707 cdtor_label
= create_artificial_label (input_location
);
13710 start_fname_decls ();
13712 store_parm_decls (current_function_parms
);
13714 if (!processing_template_decl
13715 && flag_lifetime_dse
&& DECL_CONSTRUCTOR_P (decl1
))
13717 /* Insert a clobber to let the back end know that the object storage
13718 is dead when we enter the constructor. */
13719 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13720 tree clobber
= build_constructor (btype
, NULL
);
13721 TREE_THIS_VOLATILE (clobber
) = true;
13722 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
13723 bref
= convert_from_reference (bref
);
13724 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13725 finish_expr_stmt (exprstmt
);
13732 /* Like start_preparsed_function, except that instead of a
13733 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13735 Returns true on success. If the DECLARATOR is not suitable
13736 for a function, we return false, which tells the parser to
13737 skip the entire function. */
13740 start_function (cp_decl_specifier_seq
*declspecs
,
13741 const cp_declarator
*declarator
,
13746 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13747 invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION
, decl1
);
13748 if (decl1
== error_mark_node
)
13750 /* If the declarator is not suitable for a function definition,
13751 cause a syntax error. */
13752 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13754 error ("invalid function declaration");
13758 if (DECL_MAIN_P (decl1
))
13759 /* main must return int. grokfndecl should have corrected it
13760 (and issued a diagnostic) if the user got it wrong. */
13761 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13762 integer_type_node
));
13764 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13767 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13771 use_eh_spec_block (tree fn
)
13773 return (flag_exceptions
&& flag_enforce_eh_specs
13774 && !processing_template_decl
13775 && !type_throw_all_p (TREE_TYPE (fn
))
13776 /* We insert the EH_SPEC_BLOCK only in the original
13777 function; then, it is copied automatically to the
13779 && !DECL_CLONED_FUNCTION_P (fn
)
13780 /* Implicitly-generated constructors and destructors have
13781 exception specifications. However, those specifications
13782 are the union of the possible exceptions specified by the
13783 constructors/destructors for bases and members, so no
13784 unallowed exception will ever reach this function. By
13785 not creating the EH_SPEC_BLOCK we save a little memory,
13786 and we avoid spurious warnings about unreachable
13788 && !DECL_DEFAULTED_FN (fn
));
13791 /* Store the parameter declarations into the current function declaration.
13792 This is called after parsing the parameter declarations, before
13793 digesting the body of the function.
13795 Also install to binding contour return value identifier, if any. */
13798 store_parm_decls (tree current_function_parms
)
13800 tree fndecl
= current_function_decl
;
13803 /* This is a chain of any other decls that came in among the parm
13804 declarations. If a parm is declared with enum {foo, bar} x;
13805 then CONST_DECLs for foo and bar are put here. */
13806 tree nonparms
= NULL_TREE
;
13808 if (current_function_parms
)
13810 /* This case is when the function was defined with an ANSI prototype.
13811 The parms already have decls, so we need not do anything here
13812 except record them as in effect
13813 and complain if any redundant old-style parm decls were written. */
13815 tree specparms
= current_function_parms
;
13818 /* Must clear this because it might contain TYPE_DECLs declared
13820 current_binding_level
->names
= NULL
;
13822 /* If we're doing semantic analysis, then we'll call pushdecl
13823 for each of these. We must do them in reverse order so that
13824 they end in the correct forward order. */
13825 specparms
= nreverse (specparms
);
13827 for (parm
= specparms
; parm
; parm
= next
)
13829 next
= DECL_CHAIN (parm
);
13830 if (TREE_CODE (parm
) == PARM_DECL
)
13832 if (DECL_NAME (parm
) == NULL_TREE
13833 || !VOID_TYPE_P (parm
))
13836 error ("parameter %qD declared void", parm
);
13840 /* If we find an enum constant or a type tag,
13841 put it aside for the moment. */
13842 TREE_CHAIN (parm
) = NULL_TREE
;
13843 nonparms
= chainon (nonparms
, parm
);
13847 /* Get the decls in their original chain order and record in the
13848 function. This is all and only the PARM_DECLs that were
13849 pushed into scope by the loop above. */
13850 DECL_ARGUMENTS (fndecl
) = getdecls ();
13853 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13855 /* Now store the final chain of decls for the arguments
13856 as the decl-chain of the current lexical scope.
13857 Put the enumerators in as well, at the front so that
13858 DECL_ARGUMENTS is not modified. */
13859 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13861 if (use_eh_spec_block (current_function_decl
))
13862 current_eh_spec_block
= begin_eh_spec_block ();
13866 /* We have finished doing semantic analysis on DECL, but have not yet
13867 generated RTL for its body. Save away our current state, so that
13868 when we want to generate RTL later we know what to do. */
13871 save_function_data (tree decl
)
13873 struct language_function
*f
;
13875 /* Save the language-specific per-function data so that we can
13876 get it back when we really expand this function. */
13877 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13880 f
= ggc_alloc
<language_function
> ();
13881 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13882 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13884 /* Clear out the bits we don't need. */
13885 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13886 f
->bindings
= NULL
;
13887 f
->x_local_names
= NULL
;
13888 f
->base
.local_typedefs
= NULL
;
13892 /* Set the return value of the constructor (if present). */
13895 finish_constructor_body (void)
13900 if (targetm
.cxx
.cdtor_returns_this ()
13901 && (! TYPE_FOR_JAVA (current_class_type
)))
13903 /* Any return from a constructor will end up here. */
13904 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13906 val
= DECL_ARGUMENTS (current_function_decl
);
13907 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13908 DECL_RESULT (current_function_decl
), val
);
13909 /* Return the address of the object. */
13910 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13911 add_stmt (exprstmt
);
13915 /* Do all the processing for the beginning of a destructor; set up the
13916 vtable pointers and cleanups for bases and members. */
13919 begin_destructor_body (void)
13921 tree compound_stmt
;
13923 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13924 issued an error message. We still want to try to process the
13925 body of the function, but initialize_vtbl_ptrs will crash if
13926 TYPE_BINFO is NULL. */
13927 if (COMPLETE_TYPE_P (current_class_type
))
13929 compound_stmt
= begin_compound_stmt (0);
13930 /* Make all virtual function table pointers in non-virtual base
13931 classes point to CURRENT_CLASS_TYPE's virtual function
13933 initialize_vtbl_ptrs (current_class_ptr
);
13934 finish_compound_stmt (compound_stmt
);
13936 if (flag_lifetime_dse
)
13938 /* Insert a cleanup to let the back end know that the object is dead
13939 when we exit the destructor, either normally or via exception. */
13940 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13941 tree clobber
= build_constructor (btype
, NULL
);
13942 TREE_THIS_VOLATILE (clobber
) = true;
13943 tree bref
= build_nop (build_reference_type (btype
),
13944 current_class_ptr
);
13945 bref
= convert_from_reference (bref
);
13946 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13947 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13950 /* And insert cleanups for our bases and members so that they
13951 will be properly destroyed if we throw. */
13952 push_base_cleanups ();
13956 /* At the end of every destructor we generate code to delete the object if
13957 necessary. Do that now. */
13960 finish_destructor_body (void)
13964 /* Any return from a destructor will end up here; that way all base
13965 and member cleanups will be run when the function returns. */
13966 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13968 /* In a virtual destructor, we must call delete. */
13969 if (DECL_VIRTUAL_P (current_function_decl
))
13972 tree virtual_size
= cxx_sizeof (current_class_type
);
13976 At the point of definition of a virtual destructor (including
13977 an implicit definition), non-placement operator delete shall
13978 be looked up in the scope of the destructor's class and if
13979 found shall be accessible and unambiguous. */
13980 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13982 /*global_p=*/false,
13983 /*placement=*/NULL_TREE
,
13984 /*alloc_fn=*/NULL_TREE
,
13985 tf_warning_or_error
);
13987 if_stmt
= begin_if_stmt ();
13988 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13989 current_in_charge_parm
,
13992 finish_expr_stmt (exprstmt
);
13993 finish_then_clause (if_stmt
);
13994 finish_if_stmt (if_stmt
);
13997 if (targetm
.cxx
.cdtor_returns_this ())
14001 val
= DECL_ARGUMENTS (current_function_decl
);
14002 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
14003 DECL_RESULT (current_function_decl
), val
);
14004 /* Return the address of the object. */
14005 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
14006 add_stmt (exprstmt
);
14010 /* Do the necessary processing for the beginning of a function body, which
14011 in this case includes member-initializers, but not the catch clauses of
14012 a function-try-block. Currently, this means opening a binding level
14013 for the member-initializers (in a ctor), member cleanups (in a dtor),
14014 and capture proxies (in a lambda operator()). */
14017 begin_function_body (void)
14021 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14024 if (processing_template_decl
)
14025 /* Do nothing now. */;
14027 /* Always keep the BLOCK node associated with the outermost pair of
14028 curly braces of a function. These are needed for correct
14029 operation of dwarfout.c. */
14030 keep_next_level (true);
14032 stmt
= begin_compound_stmt (BCS_FN_BODY
);
14034 if (processing_template_decl
)
14035 /* Do nothing now. */;
14036 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14037 begin_destructor_body ();
14042 /* Do the processing for the end of a function body. Currently, this means
14043 closing out the cleanups for fully-constructed bases and members, and in
14044 the case of the destructor, deleting the object if desired. Again, this
14045 is only meaningful for [cd]tors, since they are the only functions where
14046 there is a significant distinction between the main body and any
14047 function catch clauses. Handling, say, main() return semantics here
14048 would be wrong, as flowing off the end of a function catch clause for
14049 main() would also need to return 0. */
14052 finish_function_body (tree compstmt
)
14054 if (compstmt
== NULL_TREE
)
14057 /* Close the block. */
14058 finish_compound_stmt (compstmt
);
14060 if (processing_template_decl
)
14061 /* Do nothing now. */;
14062 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14063 finish_constructor_body ();
14064 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14065 finish_destructor_body ();
14068 /* Given a function, returns the BLOCK corresponding to the outermost level
14069 of curly braces, skipping the artificial block created for constructor
14073 outer_curly_brace_block (tree fndecl
)
14075 tree block
= DECL_INITIAL (fndecl
);
14076 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14078 block
= BLOCK_SUBBLOCKS (block
);
14079 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14081 block
= BLOCK_SUBBLOCKS (block
);
14082 gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block
));
14086 /* If FNDECL is a class's key method, add the class to the list of
14087 keyed classes that should be emitted. */
14090 record_key_method_defined (tree fndecl
)
14092 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14093 && DECL_VIRTUAL_P (fndecl
)
14094 && !processing_template_decl
)
14096 tree fnclass
= DECL_CONTEXT (fndecl
);
14097 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14098 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14102 /* Subroutine of finish_function.
14103 Save the body of constexpr functions for possible
14104 future compile time evaluation. */
14107 maybe_save_function_definition (tree fun
)
14109 if (!processing_template_decl
14110 && DECL_DECLARED_CONSTEXPR_P (fun
)
14111 && !cp_function_chain
->invalid_constexpr
14112 && !DECL_CLONED_FUNCTION_P (fun
))
14113 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14116 /* Finish up a function declaration and compile that function
14117 all the way to assembler language output. The free the storage
14118 for the function definition.
14120 FLAGS is a bitwise or of the following values:
14122 We just finished processing the body of an in-class inline
14123 function definition. (This processing will have taken place
14124 after the class definition is complete.) */
14127 finish_function (int flags
)
14129 tree fndecl
= current_function_decl
;
14130 tree fntype
, ctype
= NULL_TREE
;
14131 int inclass_inline
= (flags
& 2) != 0;
14133 /* When we get some parse errors, we can end up without a
14134 current_function_decl, so cope. */
14135 if (fndecl
== NULL_TREE
)
14136 return error_mark_node
;
14138 if (c_dialect_objc ())
14139 objc_finish_function ();
14141 gcc_assert (!defer_mark_used_calls
);
14142 defer_mark_used_calls
= true;
14144 record_key_method_defined (fndecl
);
14146 fntype
= TREE_TYPE (fndecl
);
14148 /* TREE_READONLY (fndecl) = 1;
14149 This caused &foo to be of type ptr-to-const-function
14150 which then got a warning when stored in a ptr-to-function variable. */
14152 gcc_assert (building_stmt_list_p ());
14153 /* The current function is being defined, so its DECL_INITIAL should
14154 be set, and unless there's a multiple definition, it should be
14155 error_mark_node. */
14156 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14158 /* For a cloned function, we've already got all the code we need;
14159 there's no need to add any extra bits. */
14160 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14162 /* Make it so that `main' always returns 0 by default. */
14163 if (DECL_MAIN_P (current_function_decl
))
14164 finish_return_stmt (integer_zero_node
);
14166 if (use_eh_spec_block (current_function_decl
))
14167 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14168 (TREE_TYPE (current_function_decl
)),
14169 current_eh_spec_block
);
14172 /* If we're saving up tree structure, tie off the function now. */
14173 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14175 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14176 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14178 finish_fname_decls ();
14180 /* If this function can't throw any exceptions, remember that. */
14181 if (!processing_template_decl
14182 && !cp_function_chain
->can_throw
14183 && !flag_non_call_exceptions
14184 && !decl_replaceable_p (fndecl
))
14185 TREE_NOTHROW (fndecl
) = 1;
14187 /* This must come after expand_function_end because cleanups might
14188 have declarations (from inline functions) that need to go into
14189 this function's blocks. */
14191 /* If the current binding level isn't the outermost binding level
14192 for this function, either there is a bug, or we have experienced
14193 syntax errors and the statement tree is malformed. */
14194 if (current_binding_level
->kind
!= sk_function_parms
)
14196 /* Make sure we have already experienced errors. */
14197 gcc_assert (errorcount
);
14199 /* Throw away the broken statement tree and extra binding
14201 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14203 while (current_binding_level
->kind
!= sk_function_parms
)
14205 if (current_binding_level
->kind
== sk_class
)
14206 pop_nested_class ();
14208 poplevel (0, 0, 0);
14211 poplevel (1, 0, 1);
14213 /* Statements should always be full-expressions at the outermost set
14214 of curly braces for a function. */
14215 gcc_assert (stmts_are_full_exprs_p ());
14217 /* If there are no return statements in a function with auto return type,
14218 the return type is void. But if the declared type is something like
14219 auto*, this is an error. */
14220 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14221 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14223 if (!is_auto (current_function_auto_return_pattern
)
14224 && !current_function_returns_value
&& !current_function_returns_null
)
14226 error ("no return statements in function returning %qT",
14227 current_function_auto_return_pattern
);
14228 inform (input_location
, "only plain %<auto%> return type can be "
14229 "deduced to %<void%>");
14231 apply_deduced_return_type (fndecl
, void_type_node
);
14232 fntype
= TREE_TYPE (fndecl
);
14235 /* Save constexpr function body before it gets munged by
14236 the NRV transformation. */
14237 maybe_save_function_definition (fndecl
);
14239 /* Set up the named return value optimization, if we can. Candidate
14240 variables are selected in check_return_expr. */
14241 if (current_function_return_value
)
14243 tree r
= current_function_return_value
;
14246 if (r
!= error_mark_node
14247 /* This is only worth doing for fns that return in memory--and
14248 simpler, since we don't have to worry about promoted modes. */
14249 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14250 /* Only allow this for variables declared in the outer scope of
14251 the function so we know that their lifetime always ends with a
14252 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14253 we were to do this optimization in tree-ssa. */
14254 && (outer
= outer_curly_brace_block (fndecl
))
14255 && chain_member (r
, BLOCK_VARS (outer
)))
14256 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14258 current_function_return_value
= NULL_TREE
;
14261 /* Remember that we were in class scope. */
14262 if (current_class_name
)
14263 ctype
= current_class_type
;
14265 /* Must mark the RESULT_DECL as being in this function. */
14266 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14268 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14269 to the FUNCTION_DECL node itself. */
14270 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14272 /* Save away current state, if appropriate. */
14273 if (!processing_template_decl
)
14274 save_function_data (fndecl
);
14276 /* Complain if there's just no return statement. */
14277 if (warn_return_type
14278 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14279 && !dependent_type_p (TREE_TYPE (fntype
))
14280 && !current_function_returns_value
&& !current_function_returns_null
14281 /* Don't complain if we abort or throw. */
14282 && !current_function_returns_abnormally
14283 /* Don't complain if there's an infinite loop. */
14284 && !current_function_infinite_loop
14285 /* Don't complain if we are declared noreturn. */
14286 && !TREE_THIS_VOLATILE (fndecl
)
14287 && !DECL_NAME (DECL_RESULT (fndecl
))
14288 && !TREE_NO_WARNING (fndecl
)
14289 /* Structor return values (if any) are set by the compiler. */
14290 && !DECL_CONSTRUCTOR_P (fndecl
)
14291 && !DECL_DESTRUCTOR_P (fndecl
)
14292 && targetm
.warn_func_return (fndecl
))
14294 warning (OPT_Wreturn_type
,
14295 "no return statement in function returning non-void");
14296 TREE_NO_WARNING (fndecl
) = 1;
14299 /* Store the end of the function, so that we get good line number
14300 info for the epilogue. */
14301 cfun
->function_end_locus
= input_location
;
14303 /* Complain about parameters that are only set, but never otherwise used. */
14304 if (warn_unused_but_set_parameter
14305 && !processing_template_decl
14306 && errorcount
== unused_but_set_errorcount
14307 && !DECL_CLONED_FUNCTION_P (fndecl
))
14311 for (decl
= DECL_ARGUMENTS (fndecl
);
14313 decl
= DECL_CHAIN (decl
))
14314 if (TREE_USED (decl
)
14315 && TREE_CODE (decl
) == PARM_DECL
14316 && !DECL_READ_P (decl
)
14317 && DECL_NAME (decl
)
14318 && !DECL_ARTIFICIAL (decl
)
14319 && !TREE_NO_WARNING (decl
)
14320 && !DECL_IN_SYSTEM_HEADER (decl
)
14321 && TREE_TYPE (decl
) != error_mark_node
14322 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14323 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14324 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14325 warning (OPT_Wunused_but_set_parameter
,
14326 "parameter %q+D set but not used", decl
);
14327 unused_but_set_errorcount
= errorcount
;
14330 /* Complain about locally defined typedefs that are not used in this
14332 maybe_warn_unused_local_typedefs ();
14334 /* Possibly warn about unused parameters. */
14335 if (warn_unused_parameter
14336 && !processing_template_decl
14337 && !DECL_CLONED_FUNCTION_P (fndecl
))
14338 do_warn_unused_parameter (fndecl
);
14340 /* Genericize before inlining. */
14341 if (!processing_template_decl
)
14343 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14344 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14345 cp_genericize (fndecl
);
14346 /* Clear out the bits we don't need. */
14347 f
->x_current_class_ptr
= NULL
;
14348 f
->x_current_class_ref
= NULL
;
14349 f
->x_eh_spec_block
= NULL
;
14350 f
->x_in_charge_parm
= NULL
;
14351 f
->x_vtt_parm
= NULL
;
14352 f
->x_return_value
= NULL
;
14353 f
->bindings
= NULL
;
14354 f
->extern_decl_map
= NULL
;
14355 f
->infinite_loops
= NULL
;
14357 /* Clear out the bits we don't need. */
14358 local_names
= NULL
;
14360 /* We're leaving the context of this function, so zap cfun. It's still in
14361 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14363 current_function_decl
= NULL
;
14365 /* If this is an in-class inline definition, we may have to pop the
14366 bindings for the template parameters that we added in
14367 maybe_begin_member_template_processing when start_function was
14369 if (inclass_inline
)
14370 maybe_end_member_template_processing ();
14372 /* Leave the scope of the class. */
14374 pop_nested_class ();
14379 current_function_decl
= NULL_TREE
;
14381 defer_mark_used_calls
= false;
14382 if (deferred_mark_used_calls
)
14387 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14389 vec_free (deferred_mark_used_calls
);
14392 invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION
, fndecl
);
14396 /* Create the FUNCTION_DECL for a function definition.
14397 DECLSPECS and DECLARATOR are the parts of the declaration;
14398 they describe the return type and the name of the function,
14399 but twisted together in a fashion that parallels the syntax of C.
14401 This function creates a binding context for the function body
14402 as well as setting up the FUNCTION_DECL in current_function_decl.
14404 Returns a FUNCTION_DECL on success.
14406 If the DECLARATOR is not suitable for a function (it defines a datum
14407 instead), we return 0, which tells yyparse to report a parse error.
14409 May return void_type_node indicating that this method is actually
14410 a friend. See grokfield for more details.
14412 Came here with a `.pushlevel' .
14414 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14415 CHANGES TO CODE IN `grokfield'. */
14418 grokmethod (cp_decl_specifier_seq
*declspecs
,
14419 const cp_declarator
*declarator
, tree attrlist
)
14421 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14424 if (fndecl
== error_mark_node
)
14425 return error_mark_node
;
14427 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14429 error ("invalid member function declaration");
14430 return error_mark_node
;
14434 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14436 /* Pass friends other than inline friend functions back. */
14437 if (fndecl
== void_type_node
)
14440 if (DECL_IN_AGGR_P (fndecl
))
14442 if (DECL_CLASS_SCOPE_P (fndecl
))
14443 error ("%qD is already defined in class %qT", fndecl
,
14444 DECL_CONTEXT (fndecl
));
14445 return error_mark_node
;
14448 check_template_shadow (fndecl
);
14450 if (TREE_PUBLIC (fndecl
))
14451 DECL_COMDAT (fndecl
) = 1;
14452 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14453 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14455 /* We process method specializations in finish_struct_1. */
14456 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14458 fndecl
= push_template_decl (fndecl
);
14459 if (fndecl
== error_mark_node
)
14463 if (! DECL_FRIEND_P (fndecl
))
14465 if (DECL_CHAIN (fndecl
))
14467 fndecl
= copy_node (fndecl
);
14468 TREE_CHAIN (fndecl
) = NULL_TREE
;
14472 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14474 DECL_IN_AGGR_P (fndecl
) = 1;
14479 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14480 we can lay it out later, when and if its type becomes complete.
14482 Also handle constexpr variables where the initializer involves
14483 an unlowered PTRMEM_CST because the class isn't complete yet. */
14486 maybe_register_incomplete_var (tree var
)
14488 gcc_assert (VAR_P (var
));
14490 /* Keep track of variables with incomplete types. */
14491 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14492 && DECL_EXTERNAL (var
))
14494 tree inner_type
= TREE_TYPE (var
);
14496 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14497 inner_type
= TREE_TYPE (inner_type
);
14498 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14500 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14501 /* RTTI TD entries are created while defining the type_info. */
14502 || (TYPE_LANG_SPECIFIC (inner_type
)
14503 && TYPE_BEING_DEFINED (inner_type
)))
14505 incomplete_var iv
= {var
, inner_type
};
14506 vec_safe_push (incomplete_vars
, iv
);
14508 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14509 && decl_constant_var_p (var
)
14510 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14512 /* When the outermost open class is complete we can resolve any
14513 pointers-to-members. */
14514 tree context
= outermost_open_class ();
14515 incomplete_var iv
= {var
, context
};
14516 vec_safe_push (incomplete_vars
, iv
);
14521 /* Called when a class type (given by TYPE) is defined. If there are
14522 any existing VAR_DECLs whose type has been completed by this
14523 declaration, update them now. */
14526 complete_vars (tree type
)
14529 incomplete_var
*iv
;
14531 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14533 if (same_type_p (type
, iv
->incomplete_type
))
14535 tree var
= iv
->decl
;
14536 tree type
= TREE_TYPE (var
);
14538 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14539 == iv
->incomplete_type
)
14541 /* Complete the type of the variable. The VAR_DECL itself
14542 will be laid out in expand_expr. */
14543 complete_type (type
);
14544 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14547 if (DECL_INITIAL (var
)
14548 && decl_constant_var_p (var
))
14549 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14551 /* Remove this entry from the list. */
14552 incomplete_vars
->unordered_remove (ix
);
14558 /* Check for pending declarations which may have abstract type. */
14559 complete_type_check_abstract (type
);
14562 /* If DECL is of a type which needs a cleanup, build and return an
14563 expression to perform that cleanup here. Return NULL_TREE if no
14564 cleanup need be done. */
14567 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14573 /* Assume no cleanup is required. */
14574 cleanup
= NULL_TREE
;
14576 if (error_operand_p (decl
))
14579 /* Handle "__attribute__((cleanup))". We run the cleanup function
14580 before the destructor since the destructor is what actually
14581 terminates the lifetime of the object. */
14582 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14589 /* Get the name specified by the user for the cleanup function. */
14590 id
= TREE_VALUE (TREE_VALUE (attr
));
14591 /* Look up the name to find the cleanup function to call. It is
14592 important to use lookup_name here because that is what is
14593 used in c-common.c:handle_cleanup_attribute when performing
14594 initial checks on the attribute. Note that those checks
14595 include ensuring that the function found is not an overloaded
14596 function, or an object with an overloaded call operator,
14597 etc.; we can rely on the fact that the function found is an
14598 ordinary FUNCTION_DECL. */
14599 fn
= lookup_name (id
);
14600 arg
= build_address (decl
);
14601 if (!mark_used (decl
, complain
) && !(complain
& tf_error
))
14602 return error_mark_node
;
14603 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14604 if (cleanup
== error_mark_node
)
14605 return error_mark_node
;
14607 /* Handle ordinary C++ destructors. */
14608 type
= TREE_TYPE (decl
);
14609 if (type_build_dtor_call (type
))
14611 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14615 if (TREE_CODE (type
) == ARRAY_TYPE
)
14618 addr
= build_address (decl
);
14620 call
= build_delete (TREE_TYPE (addr
), addr
,
14621 sfk_complete_destructor
, flags
, 0, complain
);
14622 if (call
== error_mark_node
)
14623 cleanup
= error_mark_node
;
14624 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14625 /* Discard the call. */;
14627 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14632 /* build_delete sets the location of the destructor call to the
14633 current location, even though the destructor is going to be
14634 called later, at the end of the current scope. This can lead to
14635 a "jumpy" behaviour for users of debuggers when they step around
14636 the end of the block. So let's unset the location of the
14637 destructor call instead. */
14638 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14639 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14642 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
)))
14643 /* Treat objects with destructors as used; the destructor may do
14644 something substantive. */
14645 && !mark_used (decl
, complain
) && !(complain
& tf_error
))
14646 return error_mark_node
;
14652 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14653 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14654 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14657 static_fn_type (tree memfntype
)
14662 if (TYPE_PTRMEMFUNC_P (memfntype
))
14663 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14664 if (POINTER_TYPE_P (memfntype
)
14665 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14666 memfntype
= TREE_TYPE (memfntype
);
14667 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14669 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14670 args
= TYPE_ARG_TYPES (memfntype
);
14671 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14672 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14673 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14674 fntype
= (cp_build_type_attribute_variant
14675 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14676 fntype
= (build_exception_variant
14677 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14678 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14679 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14683 /* DECL was originally constructed as a non-static member function,
14684 but turned out to be static. Update it accordingly. */
14687 revert_static_member_fn (tree decl
)
14689 tree stype
= static_fn_type (decl
);
14690 cp_cv_quals quals
= type_memfn_quals (stype
);
14691 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14693 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14694 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14696 TREE_TYPE (decl
) = stype
;
14698 if (DECL_ARGUMENTS (decl
))
14699 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14700 DECL_STATIC_FUNCTION_P (decl
) = 1;
14703 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14704 one of the language-independent trees. */
14706 enum cp_tree_node_structure_enum
14707 cp_tree_node_structure (union lang_tree_node
* t
)
14709 switch (TREE_CODE (&t
->generic
))
14711 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14712 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14713 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14714 case OVERLOAD
: return TS_CP_OVERLOAD
;
14715 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14716 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14717 case BASELINK
: return TS_CP_BASELINK
;
14718 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14719 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14720 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14721 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14722 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14723 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14724 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14725 default: return TS_CP_GENERIC
;
14729 /* Build the void_list_node (void_type_node having been created). */
14731 build_void_list_node (void)
14733 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14738 cp_missing_noreturn_ok_p (tree decl
)
14740 /* A missing noreturn is ok for the `main' function. */
14741 return DECL_MAIN_P (decl
);
14744 /* Return the decl used to identify the COMDAT group into which DECL should
14748 cxx_comdat_group (tree decl
)
14750 /* Virtual tables, construction virtual tables, and virtual table
14751 tables all go in a single COMDAT group, named after the primary
14753 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14754 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14755 /* For all other DECLs, the COMDAT group is the mangled name of the
14756 declaration itself. */
14759 while (DECL_THUNK_P (decl
))
14761 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14762 into the same section as the target function. In that case
14763 we must return target's name. */
14764 tree target
= THUNK_TARGET (decl
);
14765 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14766 && DECL_SECTION_NAME (target
) != NULL
14767 && DECL_ONE_ONLY (target
))
14777 /* Returns the return type for FN as written by the user, which may include
14778 a placeholder for a deduced return type. */
14781 fndecl_declared_return_type (tree fn
)
14783 fn
= STRIP_TEMPLATE (fn
);
14784 if (FNDECL_USED_AUTO (fn
))
14786 struct language_function
*f
= NULL
;
14787 if (DECL_STRUCT_FUNCTION (fn
))
14788 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14790 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14791 return f
->x_auto_return_pattern
;
14793 return TREE_TYPE (TREE_TYPE (fn
));
14796 /* Returns true iff DECL was declared with an auto return type and it has
14797 not yet been deduced to a real type. */
14800 undeduced_auto_decl (tree decl
)
14802 if (cxx_dialect
< cxx14
)
14804 return type_uses_auto (TREE_TYPE (decl
));
14807 /* Complain if DECL has an undeduced return type. */
14810 require_deduced_type (tree decl
)
14812 if (undeduced_auto_decl (decl
))
14813 error ("use of %qD before deduction of %<auto%>", decl
);
14816 #include "gt-cp-decl.h"