1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988-2015 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Process declarations and symbol lookup for C++ front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
31 #include "coretypes.h"
36 #include "tree-hasher.h"
37 #include "stringpool.h"
38 #include "stor-layout.h"
44 #include "tree-iterator.h"
45 #include "tree-inline.h"
51 #include "c-family/c-common.h"
52 #include "c-family/c-objc.h"
53 #include "c-family/c-pragma.h"
54 #include "c-family/c-target.h"
55 #include "c-family/c-ubsan.h"
56 #include "diagnostic.h"
60 #include "splay-tree.h"
62 #include "plugin-api.h"
63 #include "hard-reg-set.h"
70 /* Possible cases of bad specifiers type used by bad_specifiers. */
72 BSP_VAR
, /* variable */
73 BSP_PARM
, /* parameter */
78 static tree
grokparms (tree parmlist
, tree
*);
79 static const char *redeclaration_error_message (tree
, tree
);
81 static int decl_jump_unsafe (tree
);
82 static void require_complete_types_for_parms (tree
);
83 static int ambi_op_p (enum tree_code
);
84 static int unary_op_p (enum tree_code
);
85 static void push_local_name (tree
);
86 static tree
grok_reference_init (tree
, tree
, tree
, int);
87 static tree
grokvardecl (tree
, tree
, tree
, const cp_decl_specifier_seq
*,
89 static int check_static_variable_definition (tree
, tree
);
90 static void record_unknown_type (tree
, const char *);
91 static tree
builtin_function_1 (tree
, tree
, bool);
92 static int member_function_or_else (tree
, tree
, enum overload_flags
);
93 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
95 static void check_for_uninitialized_const_var (tree
);
96 static tree
local_variable_p_walkfn (tree
*, int *, void *);
97 static tree
record_builtin_java_type (const char *, int);
98 static const char *tag_name (enum tag_types
);
99 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
100 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
101 static void maybe_deduce_size_from_array_init (tree
, tree
);
102 static void layout_var_decl (tree
);
103 static tree
check_initializer (tree
, tree
, int, vec
<tree
, va_gc
> **);
104 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
105 static void save_function_data (tree
);
106 static void copy_type_enum (tree
, tree
);
107 static void check_function_type (tree
, tree
);
108 static void finish_constructor_body (void);
109 static void begin_destructor_body (void);
110 static void finish_destructor_body (void);
111 static void record_key_method_defined (tree
);
112 static tree
create_array_type_for_decl (tree
, tree
, tree
);
113 static tree
get_atexit_node (void);
114 static tree
get_dso_handle_node (void);
115 static tree
start_cleanup_fn (void);
116 static void end_cleanup_fn (void);
117 static tree
cp_make_fname_decl (location_t
, tree
, int);
118 static void initialize_predefined_identifiers (void);
119 static tree check_special_function_return_type
120 (special_function_kind
, tree
, tree
);
121 static tree
push_cp_library_fn (enum tree_code
, tree
, int);
122 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
, int);
123 static void store_parm_decls (tree
);
124 static void initialize_local_var (tree
, tree
);
125 static void expand_static_init (tree
, tree
);
127 /* The following symbols are subsumed in the cp_global_trees array, and
128 listed here individually for documentation purposes.
131 tree wchar_decl_node;
133 tree vtable_entry_type;
134 tree delta_type_node;
135 tree __t_desc_type_node;
137 tree class_type_node;
138 tree unknown_type_node;
140 Array type `vtable_entry_type[]'
143 tree vtbl_ptr_type_node;
150 A FUNCTION_DECL which can call `abort'. Not necessarily the
151 one that the user will declare, but sufficient to be called
152 by routines that want to abort the program.
157 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
158 tree tinfo_var_id; */
160 tree cp_global_trees
[CPTI_MAX
];
162 /* Indicates that there is a type value in some namespace, although
163 that is not necessarily in scope at the moment. */
165 tree global_type_node
;
167 /* The node that holds the "name" of the global scope. */
168 tree global_scope_name
;
170 #define local_names cp_function_chain->x_local_names
172 /* A list of objects which have constructors or destructors
173 which reside in the global scope. The decl is stored in
174 the TREE_VALUE slot and the initializer is stored
175 in the TREE_PURPOSE slot. */
176 tree static_aggregates
;
178 /* Like static_aggregates, but for thread_local variables. */
183 /* A node for the integer constant 2. */
185 tree integer_two_node
;
187 /* Used only for jumps to as-yet undefined labels, since jumps to
188 defined labels can have their validity checked immediately. */
190 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
191 struct named_label_use_entry
*next
;
192 /* The binding level to which this entry is *currently* attached.
193 This is initially the binding level in which the goto appeared,
194 but is modified as scopes are closed. */
195 cp_binding_level
*binding_level
;
196 /* The head of the names list that was current when the goto appeared,
197 or the inner scope popped. These are the decls that will *not* be
198 skipped when jumping to the label. */
200 /* The location of the goto, for error reporting. */
201 location_t o_goto_locus
;
202 /* True if an OpenMP structured block scope has been closed since
203 the goto appeared. This means that the branch from the label will
204 illegally exit an OpenMP scope. */
208 /* A list of all LABEL_DECLs in the function that have names. Here so
209 we can clear out their names' definitions at the end of the
210 function, and so we can check the validity of jumps to these labels. */
212 struct GTY((for_user
)) named_label_entry
{
213 /* The decl itself. */
216 /* The binding level to which the label is *currently* attached.
217 This is initially set to the binding level in which the label
218 is defined, but is modified as scopes are closed. */
219 cp_binding_level
*binding_level
;
220 /* The head of the names list that was current when the label was
221 defined, or the inner scope popped. These are the decls that will
222 be skipped when jumping to the label. */
224 /* A vector of all decls from all binding levels that would be
225 crossed by a backward branch to the label. */
226 vec
<tree
, va_gc
> *bad_decls
;
228 /* A list of uses of the label, before the label is defined. */
229 struct named_label_use_entry
*uses
;
231 /* The following bits are set after the label is defined, and are
232 updated as scopes are popped. They indicate that a backward jump
233 to the label will illegally enter a scope of the given flavor. */
239 #define named_labels cp_function_chain->x_named_labels
241 /* The number of function bodies which we are currently processing.
242 (Zero if we are at namespace scope, one inside the body of a
243 function, two inside the body of a function in a local class, etc.) */
246 /* To avoid unwanted recursion, finish_function defers all mark_used calls
247 encountered during its execution until it finishes. */
248 bool defer_mark_used_calls
;
249 vec
<tree
, va_gc
> *deferred_mark_used_calls
;
251 /* States indicating how grokdeclarator() should handle declspecs marked
252 with __attribute__((deprecated)). An object declared as
253 __attribute__((deprecated)) suppresses warnings of uses of other
255 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
258 /* A list of VAR_DECLs whose type was incomplete at the time the
259 variable was declared. */
261 typedef struct GTY(()) incomplete_var_d
{
263 tree incomplete_type
;
267 static GTY(()) vec
<incomplete_var
, va_gc
> *incomplete_vars
;
269 /* Returns the kind of template specialization we are currently
270 processing, given that it's declaration contained N_CLASS_SCOPES
271 explicit scope qualifications. */
274 current_tmpl_spec_kind (int n_class_scopes
)
276 int n_template_parm_scopes
= 0;
277 int seen_specialization_p
= 0;
278 int innermost_specialization_p
= 0;
281 /* Scan through the template parameter scopes. */
282 for (b
= current_binding_level
;
283 b
->kind
== sk_template_parms
;
286 /* If we see a specialization scope inside a parameter scope,
287 then something is wrong. That corresponds to a declaration
290 template <class T> template <> ...
292 which is always invalid since [temp.expl.spec] forbids the
293 specialization of a class member template if the enclosing
294 class templates are not explicitly specialized as well. */
295 if (b
->explicit_spec_p
)
297 if (n_template_parm_scopes
== 0)
298 innermost_specialization_p
= 1;
300 seen_specialization_p
= 1;
302 else if (seen_specialization_p
== 1)
303 return tsk_invalid_member_spec
;
305 ++n_template_parm_scopes
;
308 /* Handle explicit instantiations. */
309 if (processing_explicit_instantiation
)
311 if (n_template_parm_scopes
!= 0)
312 /* We've seen a template parameter list during an explicit
313 instantiation. For example:
315 template <class T> template void f(int);
317 This is erroneous. */
318 return tsk_invalid_expl_inst
;
320 return tsk_expl_inst
;
323 if (n_template_parm_scopes
< n_class_scopes
)
324 /* We've not seen enough template headers to match all the
325 specialized classes present. For example:
327 template <class T> void R<T>::S<T>::f(int);
329 This is invalid; there needs to be one set of template
330 parameters for each class. */
331 return tsk_insufficient_parms
;
332 else if (n_template_parm_scopes
== n_class_scopes
)
333 /* We're processing a non-template declaration (even though it may
334 be a member of a template class.) For example:
336 template <class T> void S<T>::f(int);
338 The `class T' matches the `S<T>', leaving no template headers
339 corresponding to the `f'. */
341 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
342 /* We've got too many template headers. For example:
344 template <> template <class T> void f (T);
346 There need to be more enclosing classes. */
347 return tsk_excessive_parms
;
349 /* This must be a template. It's of the form:
351 template <class T> template <class U> void S<T>::f(U);
353 This is a specialization if the innermost level was a
354 specialization; otherwise it's just a definition of the
356 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
359 /* Exit the current scope. */
367 /* When a label goes out of scope, check to see if that label was used
368 in a valid manner, and issue any appropriate warnings or errors. */
371 pop_label (tree label
, tree old_value
)
373 if (!processing_template_decl
)
375 if (DECL_INITIAL (label
) == NULL_TREE
)
379 error ("label %q+D used but not defined", label
);
380 location
= input_location
;
381 /* FIXME want (LOCATION_FILE (input_location), (line)0) */
382 /* Avoid crashing later. */
383 define_label (location
, DECL_NAME (label
));
386 warn_for_unused_label (label
);
389 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
392 /* At the end of a function, all labels declared within the function
393 go out of scope. BLOCK is the top-level block for the
397 pop_labels_1 (named_label_entry
**slot
, tree block
)
399 struct named_label_entry
*ent
= *slot
;
401 pop_label (ent
->label_decl
, NULL_TREE
);
403 /* Put the labels into the "variables" of the top-level block,
404 so debugger can see them. */
405 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
406 BLOCK_VARS (block
) = ent
->label_decl
;
408 named_labels
->clear_slot (slot
);
414 pop_labels (tree block
)
418 named_labels
->traverse
<tree
, pop_labels_1
> (block
);
423 /* At the end of a block with local labels, restore the outer definition. */
426 pop_local_label (tree label
, tree old_value
)
428 struct named_label_entry dummy
;
430 pop_label (label
, old_value
);
432 dummy
.label_decl
= label
;
433 named_label_entry
**slot
= named_labels
->find_slot (&dummy
, NO_INSERT
);
434 named_labels
->clear_slot (slot
);
437 /* The following two routines are used to interface to Objective-C++.
438 The binding level is purposely treated as an opaque type. */
441 objc_get_current_scope (void)
443 return current_binding_level
;
446 /* The following routine is used by the NeXT-style SJLJ exceptions;
447 variables get marked 'volatile' so as to not be clobbered by
448 _setjmp()/_longjmp() calls. All variables in the current scope,
449 as well as parent scopes up to (but not including) ENCLOSING_BLK
450 shall be thusly marked. */
453 objc_mark_locals_volatile (void *enclosing_blk
)
455 cp_binding_level
*scope
;
457 for (scope
= current_binding_level
;
458 scope
&& scope
!= enclosing_blk
;
459 scope
= scope
->level_chain
)
463 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
464 objc_volatilize_decl (decl
);
466 /* Do not climb up past the current function. */
467 if (scope
->kind
== sk_function_parms
)
472 /* Update data for defined and undefined labels when leaving a scope. */
475 poplevel_named_label_1 (named_label_entry
**slot
, cp_binding_level
*bl
)
477 named_label_entry
*ent
= *slot
;
478 cp_binding_level
*obl
= bl
->level_chain
;
480 if (ent
->binding_level
== bl
)
484 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
485 TREE_LISTs representing OVERLOADs, so be careful. */
486 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
488 : TREE_CHAIN (decl
)))
489 if (decl_jump_unsafe (decl
))
490 vec_safe_push (ent
->bad_decls
, decl
);
492 ent
->binding_level
= obl
;
493 ent
->names_in_scope
= obl
->names
;
497 ent
->in_try_scope
= true;
500 ent
->in_catch_scope
= true;
503 ent
->in_omp_scope
= true;
511 struct named_label_use_entry
*use
;
513 for (use
= ent
->uses
; use
; use
= use
->next
)
514 if (use
->binding_level
== bl
)
516 use
->binding_level
= obl
;
517 use
->names_in_scope
= obl
->names
;
518 if (bl
->kind
== sk_omp
)
519 use
->in_omp_scope
= true;
526 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
527 when errors were reported, except for -Werror-unused-but-set-*. */
528 static int unused_but_set_errorcount
;
530 /* Exit a binding level.
531 Pop the level off, and restore the state of the identifier-decl mappings
532 that were in effect when this level was entered.
534 If KEEP == 1, this level had explicit declarations, so
535 and create a "block" (a BLOCK node) for the level
536 to record its declarations and subblocks for symbol table output.
538 If FUNCTIONBODY is nonzero, this level is the body of a function,
539 so create a block as if KEEP were set and also clear out all
542 If REVERSE is nonzero, reverse the order of decls before putting
543 them into the BLOCK. */
546 poplevel (int keep
, int reverse
, int functionbody
)
549 /* The chain of decls was accumulated in reverse order.
550 Put it into forward order, just for cleanliness. */
555 int leaving_for_scope
;
558 cp_label_binding
*label_bind
;
560 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
565 gcc_assert (current_binding_level
->kind
!= sk_class
);
567 if (current_binding_level
->kind
== sk_cleanup
)
569 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
571 gcc_assert (!vec_safe_length (current_binding_level
->class_shadowed
));
573 /* We used to use KEEP == 2 to indicate that the new block should go
574 at the beginning of the list of blocks at this binding level,
575 rather than the end. This hack is no longer used. */
576 gcc_assert (keep
== 0 || keep
== 1);
578 if (current_binding_level
->keep
)
581 /* Any uses of undefined labels, and any defined labels, now operate
582 under constraints of next binding contour. */
583 if (cfun
&& !functionbody
&& named_labels
)
584 named_labels
->traverse
<cp_binding_level
*, poplevel_named_label_1
>
585 (current_binding_level
);
587 /* Get the decls in the order they were written.
588 Usually current_binding_level->names is in reverse order.
589 But parameter decls were previously put in forward order. */
592 current_binding_level
->names
593 = decls
= nreverse (current_binding_level
->names
);
595 decls
= current_binding_level
->names
;
597 /* If there were any declarations or structure tags in that level,
598 or if this level is a function body,
599 create a BLOCK to record them for the life of this function. */
601 /* Avoid function body block if possible. */
602 if (functionbody
&& subblocks
&& BLOCK_CHAIN (subblocks
) == NULL_TREE
)
604 else if (keep
== 1 || functionbody
)
605 block
= make_node (BLOCK
);
606 if (block
!= NULL_TREE
)
608 BLOCK_VARS (block
) = decls
;
609 BLOCK_SUBBLOCKS (block
) = subblocks
;
612 /* In each subblock, record that this is its superior. */
614 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
615 BLOCK_SUPERCONTEXT (link
) = block
;
617 /* We still support the old for-scope rules, whereby the variables
618 in a for-init statement were in scope after the for-statement
619 ended. We only use the new rules if flag_new_for_scope is
622 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
624 /* Before we remove the declarations first check for unused variables. */
625 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
626 && current_binding_level
->kind
!= sk_template_parms
627 && !processing_template_decl
)
628 for (tree d
= getdecls (); d
; d
= TREE_CHAIN (d
))
630 /* There are cases where D itself is a TREE_LIST. See in
631 push_local_binding where the list of decls returned by
632 getdecls is built. */
633 decl
= TREE_CODE (d
) == TREE_LIST
? TREE_VALUE (d
) : d
;
634 tree type
= TREE_TYPE (decl
);
636 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
637 && ! DECL_IN_SYSTEM_HEADER (decl
)
638 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
)
639 && type
!= error_mark_node
640 && (!CLASS_TYPE_P (type
)
641 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
642 || lookup_attribute ("warn_unused",
643 TYPE_ATTRIBUTES (TREE_TYPE (decl
)))))
645 if (! TREE_USED (decl
))
646 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
647 else if (DECL_CONTEXT (decl
) == current_function_decl
648 // For -Wunused-but-set-variable leave references alone.
649 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
650 && errorcount
== unused_but_set_errorcount
)
652 warning (OPT_Wunused_but_set_variable
,
653 "variable %q+D set but not used", decl
);
654 unused_but_set_errorcount
= errorcount
;
659 /* Remove declarations for all the DECLs in this level. */
660 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
662 if (leaving_for_scope
&& VAR_P (link
)
663 /* It's hard to make this ARM compatibility hack play nicely with
664 lambdas, and it really isn't necessary in C++11 mode. */
665 && cxx_dialect
< cxx11
668 tree name
= DECL_NAME (link
);
672 ob
= outer_binding (name
,
673 IDENTIFIER_BINDING (name
),
676 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
678 ns_binding
= NULL_TREE
;
680 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
681 /* We have something like:
686 and we are leaving the `for' scope. There's no reason to
687 keep the binding of the inner `i' in this case. */
688 pop_binding (name
, link
);
689 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
690 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
691 /* Here, we have something like:
699 We must pop the for-scope binding so we know what's a
700 type and what isn't. */
701 pop_binding (name
, link
);
704 /* Mark this VAR_DECL as dead so that we can tell we left it
705 there only for backward compatibility. */
706 DECL_DEAD_FOR_LOCAL (link
) = 1;
708 /* Keep track of what should have happened when we
709 popped the binding. */
712 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
713 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
716 /* Add it to the list of dead variables in the next
717 outermost binding to that we can remove these when we
718 leave that binding. */
720 current_binding_level
->level_chain
->dead_vars_from_for
,
723 /* Although we don't pop the cxx_binding, we do clear
724 its SCOPE since the scope is going away now. */
725 IDENTIFIER_BINDING (name
)->scope
726 = current_binding_level
->level_chain
;
733 /* Remove the binding. */
736 if (TREE_CODE (decl
) == TREE_LIST
)
737 decl
= TREE_VALUE (decl
);
740 if (TREE_CODE (name
) == OVERLOAD
)
741 name
= OVL_FUNCTION (name
);
743 gcc_assert (DECL_P (name
));
744 pop_binding (DECL_NAME (name
), decl
);
748 /* Remove declarations for any `for' variables from inner scopes
749 that we kept around. */
750 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->dead_vars_from_for
,
752 pop_binding (DECL_NAME (decl
), decl
);
754 /* Restore the IDENTIFIER_TYPE_VALUEs. */
755 for (link
= current_binding_level
->type_shadowed
;
756 link
; link
= TREE_CHAIN (link
))
757 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
759 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
760 FOR_EACH_VEC_SAFE_ELT_REVERSE (current_binding_level
->shadowed_labels
,
762 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
764 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
765 list if a `using' declaration put them there. The debugging
766 back ends won't understand OVERLOAD, so we remove them here.
767 Because the BLOCK_VARS are (temporarily) shared with
768 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
769 popped all the bindings. */
774 for (d
= &BLOCK_VARS (block
); *d
; )
776 if (TREE_CODE (*d
) == TREE_LIST
)
777 *d
= TREE_CHAIN (*d
);
779 d
= &DECL_CHAIN (*d
);
783 /* If the level being exited is the top level of a function,
784 check over all the labels. */
789 /* Since this is the top level block of a function, the vars are
790 the function's parameters. Don't leave them in the BLOCK
791 because they are found in the FUNCTION_DECL instead. */
792 BLOCK_VARS (block
) = 0;
796 pop_labels (subblocks
);
799 kind
= current_binding_level
->kind
;
800 if (kind
== sk_cleanup
)
804 /* If this is a temporary binding created for a cleanup, then we'll
805 have pushed a statement list level. Pop that, create a new
806 BIND_EXPR for the block, and insert it into the stream. */
807 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
808 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
815 /* The current function is being defined, so its DECL_INITIAL
816 should be error_mark_node. */
817 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
818 DECL_INITIAL (current_function_decl
) = block
? block
: subblocks
;
821 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
823 if (BLOCK_SUBBLOCKS (subblocks
))
824 BLOCK_OUTER_CURLY_BRACE_P (BLOCK_SUBBLOCKS (subblocks
)) = 1;
827 BLOCK_OUTER_CURLY_BRACE_P (subblocks
) = 1;
831 current_binding_level
->blocks
832 = block_chainon (current_binding_level
->blocks
, block
);
834 /* If we did not make a block for the level just exited,
835 any blocks made for inner levels
836 (since they cannot be recorded as subblocks in that level)
837 must be carried forward so they will later become subblocks
838 of something else. */
840 current_binding_level
->blocks
841 = block_chainon (current_binding_level
->blocks
, subblocks
);
843 /* Each and every BLOCK node created here in `poplevel' is important
844 (e.g. for proper debugging information) so if we created one
845 earlier, mark it as "used". */
847 TREE_USED (block
) = 1;
849 /* All temporary bindings created for cleanups are popped silently. */
850 if (kind
== sk_cleanup
)
853 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
857 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
858 itself, calling F for each. The DATA is passed to F as well. */
861 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
864 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
866 result
|= (*f
) (name_space
, data
);
868 for (; current
; current
= DECL_CHAIN (current
))
869 result
|= walk_namespaces_r (current
, f
, data
);
874 /* Walk all the namespaces, calling F for each. The DATA is passed to
878 walk_namespaces (walk_namespaces_fn f
, void* data
)
880 return walk_namespaces_r (global_namespace
, f
, data
);
883 /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
886 wrapup_globals_for_namespace (tree name_space
, void* data ATTRIBUTE_UNUSED
)
888 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
889 vec
<tree
, va_gc
> *statics
= level
->static_decls
;
890 tree
*vec
= statics
->address ();
891 int len
= statics
->length ();
893 /* Write out any globals that need to be output. */
894 return wrapup_global_declarations (vec
, len
);
897 /* In C++, you don't have to write `struct S' to refer to `S'; you
898 can just use `S'. We accomplish this by creating a TYPE_DECL as
899 if the user had written `typedef struct S S'. Create and return
900 the TYPE_DECL for TYPE. */
903 create_implicit_typedef (tree name
, tree type
)
907 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
908 DECL_ARTIFICIAL (decl
) = 1;
909 /* There are other implicit type declarations, like the one *within*
910 a class that allows you to write `S::S'. We must distinguish
912 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
913 TYPE_NAME (type
) = decl
;
914 TYPE_STUB_DECL (type
) = decl
;
919 /* Remember a local name for name-mangling purposes. */
922 push_local_name (tree decl
)
927 timevar_start (TV_NAME_LOOKUP
);
929 name
= DECL_NAME (decl
);
931 nelts
= vec_safe_length (local_names
);
932 for (i
= 0; i
< nelts
; i
++)
934 t
= (*local_names
)[i
];
935 if (DECL_NAME (t
) == name
)
937 if (!DECL_LANG_SPECIFIC (decl
))
938 retrofit_lang_decl (decl
);
939 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
940 if (DECL_DISCRIMINATOR_SET_P (t
))
941 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
943 DECL_DISCRIMINATOR (decl
) = 1;
945 (*local_names
)[i
] = decl
;
946 timevar_stop (TV_NAME_LOOKUP
);
951 vec_safe_push (local_names
, decl
);
952 timevar_stop (TV_NAME_LOOKUP
);
955 /* Subroutine of duplicate_decls: return truthvalue of whether
956 or not types of these decls match.
958 For C++, we must compare the parameter list so that `int' can match
959 `int&' in a parameter position, but `int&' is not confused with
963 decls_match (tree newdecl
, tree olddecl
)
967 if (newdecl
== olddecl
)
970 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
971 /* If the two DECLs are not even the same kind of thing, we're not
972 interested in their types. */
975 gcc_assert (DECL_P (newdecl
));
977 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
979 tree f1
= TREE_TYPE (newdecl
);
980 tree f2
= TREE_TYPE (olddecl
);
981 tree p1
= TYPE_ARG_TYPES (f1
);
982 tree p2
= TYPE_ARG_TYPES (f2
);
985 /* Specializations of different templates are different functions
986 even if they have the same type. */
987 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
988 ? DECL_TI_TEMPLATE (newdecl
)
990 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
991 ? DECL_TI_TEMPLATE (olddecl
)
996 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
997 && ! (DECL_EXTERN_C_P (newdecl
)
998 && DECL_EXTERN_C_P (olddecl
)))
1001 /* A new declaration doesn't match a built-in one unless it
1002 is also extern "C". */
1003 if (DECL_IS_BUILTIN (olddecl
)
1004 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
1007 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1010 /* A declaration with deduced return type should use its pre-deduction
1011 type for declaration matching. */
1012 r2
= fndecl_declared_return_type (olddecl
);
1014 if (same_type_p (TREE_TYPE (f1
), r2
))
1016 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
1017 && (DECL_BUILT_IN (olddecl
)
1018 #ifndef NO_IMPLICIT_EXTERN_C
1019 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1020 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1024 types_match
= self_promoting_args_p (p1
);
1025 if (p1
== void_list_node
)
1026 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1028 #ifndef NO_IMPLICIT_EXTERN_C
1029 else if (!prototype_p (f1
)
1030 && (DECL_EXTERN_C_P (olddecl
)
1031 && DECL_IN_SYSTEM_HEADER (olddecl
)
1032 && !DECL_CLASS_SCOPE_P (olddecl
))
1033 && (DECL_EXTERN_C_P (newdecl
)
1034 && DECL_IN_SYSTEM_HEADER (newdecl
)
1035 && !DECL_CLASS_SCOPE_P (newdecl
)))
1037 types_match
= self_promoting_args_p (p2
);
1038 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1044 && type_memfn_rqual (f1
) == type_memfn_rqual (f2
)
1045 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1046 || comp_type_attributes (TREE_TYPE (newdecl
),
1047 TREE_TYPE (olddecl
)) != 0);
1052 /* The decls dont match if they correspond to two different versions
1053 of the same function. Disallow extern "C" functions to be
1054 versions for now. */
1056 && !DECL_EXTERN_C_P (newdecl
)
1057 && !DECL_EXTERN_C_P (olddecl
)
1058 && targetm
.target_option
.function_versions (newdecl
, olddecl
))
1060 /* Mark functions as versions if necessary. Modify the mangled decl
1061 name if necessary. */
1062 if (DECL_FUNCTION_VERSIONED (newdecl
)
1063 && DECL_FUNCTION_VERSIONED (olddecl
))
1065 if (!DECL_FUNCTION_VERSIONED (newdecl
))
1067 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
1068 if (DECL_ASSEMBLER_NAME_SET_P (newdecl
))
1069 mangle_decl (newdecl
);
1071 if (!DECL_FUNCTION_VERSIONED (olddecl
))
1073 DECL_FUNCTION_VERSIONED (olddecl
) = 1;
1074 if (DECL_ASSEMBLER_NAME_SET_P (olddecl
))
1075 mangle_decl (olddecl
);
1077 cgraph_node::record_function_versions (olddecl
, newdecl
);
1081 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1083 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1084 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1087 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1088 DECL_TEMPLATE_PARMS (olddecl
)))
1091 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1092 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1093 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1095 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1096 DECL_TEMPLATE_RESULT (newdecl
));
1100 /* Need to check scope for variable declaration (VAR_DECL).
1101 For typedef (TYPE_DECL), scope is ignored. */
1103 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1105 Two declarations for an object with C language linkage
1106 with the same name (ignoring the namespace that qualify
1107 it) that appear in different namespace scopes refer to
1109 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1112 if (TREE_TYPE (newdecl
) == error_mark_node
)
1113 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1114 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1115 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1116 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1119 types_match
= comptypes (TREE_TYPE (newdecl
),
1120 TREE_TYPE (olddecl
),
1121 COMPARE_REDECLARATION
);
1127 /* If NEWDECL is `static' and an `extern' was seen previously,
1128 warn about it. OLDDECL is the previous declaration.
1130 Note that this does not apply to the C++ case of declaring
1131 a variable `extern const' and then later `const'.
1133 Don't complain about built-in functions, since they are beyond
1134 the user's control. */
1137 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1139 if (TREE_CODE (newdecl
) == TYPE_DECL
1140 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1141 || TREE_CODE (newdecl
) == CONST_DECL
1142 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1145 /* Don't get confused by static member functions; that's a different
1147 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1148 && DECL_STATIC_FUNCTION_P (newdecl
))
1151 /* If the old declaration was `static', or the new one isn't, then
1152 everything is OK. */
1153 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1156 /* It's OK to declare a builtin function as `static'. */
1157 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1158 && DECL_ARTIFICIAL (olddecl
))
1161 if (permerror (DECL_SOURCE_LOCATION (newdecl
),
1162 "%qD was declared %<extern%> and later %<static%>", newdecl
))
1163 inform (input_location
, "previous declaration of %q+D", olddecl
);
1166 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1167 function templates. If their exception specifications do not
1168 match, issue a diagnostic. */
1171 check_redeclaration_exception_specification (tree new_decl
,
1174 tree new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1175 tree old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1177 /* Two default specs are equivalent, don't force evaluation. */
1178 if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions
)
1179 && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions
))
1182 maybe_instantiate_noexcept (new_decl
);
1183 maybe_instantiate_noexcept (old_decl
);
1184 new_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl
));
1185 old_exceptions
= TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl
));
1189 If any declaration of a function has an exception-specification,
1190 all declarations, including the definition and an explicit
1191 specialization, of that function shall have an
1192 exception-specification with the same set of type-ids. */
1193 if (! DECL_IS_BUILTIN (old_decl
)
1195 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1198 = "declaration of %q+F has a different exception specifier";
1199 bool complained
= true;
1200 if (! DECL_IN_SYSTEM_HEADER (old_decl
))
1201 error (msg
, new_decl
);
1203 complained
= pedwarn (0, OPT_Wsystem_headers
, msg
, new_decl
);
1205 inform (0, "from previous declaration %q+F", old_decl
);
1209 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1210 Otherwise issue diagnostics. */
1213 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1215 old_decl
= STRIP_TEMPLATE (old_decl
);
1216 new_decl
= STRIP_TEMPLATE (new_decl
);
1217 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1218 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1220 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1221 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1223 if (TREE_CODE (old_decl
) == FUNCTION_DECL
)
1225 if (DECL_BUILT_IN (old_decl
))
1227 /* Hide a built-in declaration. */
1228 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1229 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1232 /* 7.1.5 [dcl.constexpr]
1233 Note: An explicit specialization can differ from the template
1234 declaration with respect to the constexpr specifier. */
1235 if (! DECL_TEMPLATE_SPECIALIZATION (old_decl
)
1236 && DECL_TEMPLATE_SPECIALIZATION (new_decl
))
1239 error ("redeclaration %q+D differs in %<constexpr%>", new_decl
);
1240 error ("from previous declaration %q+D", old_decl
);
1246 /* DECL is a redeclaration of a function or function template. If
1247 it does have default arguments issue a diagnostic. Note: this
1248 function is used to enforce the requirements in C++11 8.3.6 about
1249 no default arguments in redeclarations. */
1252 check_redeclaration_no_default_args (tree decl
)
1254 gcc_assert (DECL_DECLARES_FUNCTION_P (decl
));
1256 for (tree t
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
1257 t
&& t
!= void_list_node
; t
= TREE_CHAIN (t
))
1258 if (TREE_PURPOSE (t
))
1260 permerror (input_location
,
1261 "redeclaration of %q+#D may not have default "
1267 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1268 && lookup_attribute ("gnu_inline", \
1269 DECL_ATTRIBUTES (fn)))
1271 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1272 If the redeclaration is invalid, a diagnostic is issued, and the
1273 error_mark_node is returned. Otherwise, OLDDECL is returned.
1275 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1278 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1281 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1283 unsigned olddecl_uid
= DECL_UID (olddecl
);
1284 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1285 int new_defines_function
= 0;
1286 tree new_template_info
;
1288 if (newdecl
== olddecl
)
1291 types_match
= decls_match (newdecl
, olddecl
);
1293 /* If either the type of the new decl or the type of the old decl is an
1294 error_mark_node, then that implies that we have already issued an
1295 error (earlier) for some bogus type specification, and in that case,
1296 it is rather pointless to harass the user with yet more error message
1297 about the same declaration, so just pretend the types match here. */
1298 if (TREE_TYPE (newdecl
) == error_mark_node
1299 || TREE_TYPE (olddecl
) == error_mark_node
)
1300 return error_mark_node
;
1302 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1303 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1305 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1306 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1307 && check_raw_literal_operator (olddecl
))
1308 error ("literal operator template %q+D conflicts with"
1309 " raw literal operator %qD", newdecl
, olddecl
);
1310 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1311 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1312 && check_raw_literal_operator (newdecl
))
1313 error ("raw literal operator %q+D conflicts with"
1314 " literal operator template %qD", newdecl
, olddecl
);
1317 if (DECL_P (olddecl
)
1318 && TREE_CODE (newdecl
) == FUNCTION_DECL
1319 && TREE_CODE (olddecl
) == FUNCTION_DECL
1320 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1322 if (DECL_DECLARED_INLINE_P (newdecl
)
1323 && DECL_UNINLINABLE (newdecl
)
1324 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1325 /* Already warned elsewhere. */;
1326 else if (DECL_DECLARED_INLINE_P (olddecl
)
1327 && DECL_UNINLINABLE (olddecl
)
1328 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1329 /* Already warned. */;
1330 else if (DECL_DECLARED_INLINE_P (newdecl
)
1331 && DECL_UNINLINABLE (olddecl
)
1332 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1334 if (warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1336 inform (DECL_SOURCE_LOCATION (olddecl
),
1337 "previous declaration of %qD with attribute noinline",
1340 else if (DECL_DECLARED_INLINE_P (olddecl
)
1341 && DECL_UNINLINABLE (newdecl
)
1342 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1344 if (warning (OPT_Wattributes
, "function %q+D redeclared with "
1345 "attribute noinline", newdecl
))
1346 inform (DECL_SOURCE_LOCATION (olddecl
),
1347 "previous declaration of %qD was inline",
1352 /* Check for redeclaration and other discrepancies. */
1353 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1354 && DECL_ARTIFICIAL (olddecl
))
1356 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1357 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1359 /* Avoid warnings redeclaring built-ins which have not been
1360 explicitly declared. */
1361 if (DECL_ANTICIPATED (olddecl
))
1364 /* If you declare a built-in or predefined function name as static,
1365 the old definition is overridden, but optionally warn this was a
1366 bad choice of name. */
1367 if (! TREE_PUBLIC (newdecl
))
1369 warning (OPT_Wshadow
,
1370 DECL_BUILT_IN (olddecl
)
1371 ? G_("shadowing built-in function %q#D")
1372 : G_("shadowing library function %q#D"), olddecl
);
1373 /* Discard the old built-in function. */
1376 /* If the built-in is not ansi, then programs can override
1377 it even globally without an error. */
1378 else if (! DECL_BUILT_IN (olddecl
))
1379 warning (0, "library function %q#D redeclared as non-function %q+#D",
1382 error ("declaration of %q+#D conflicts with built-in "
1383 "declaration %q#D", newdecl
, olddecl
);
1386 else if (DECL_OMP_DECLARE_REDUCTION_P (olddecl
))
1388 gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (newdecl
));
1389 error_at (DECL_SOURCE_LOCATION (newdecl
),
1390 "redeclaration of %<pragma omp declare reduction%>");
1391 inform (DECL_SOURCE_LOCATION (olddecl
),
1392 "previous %<pragma omp declare reduction%> declaration");
1393 return error_mark_node
;
1395 else if (!types_match
)
1397 /* Avoid warnings redeclaring built-ins which have not been
1398 explicitly declared. */
1399 if (DECL_ANTICIPATED (olddecl
))
1401 /* Deal with fileptr_type_node. FILE type is not known
1402 at the time we create the builtins. */
1405 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1406 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1408 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1411 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1413 tree t
= TREE_VALUE (t1
);
1416 && TYPE_IDENTIFIER (TREE_TYPE (t
))
1417 == get_identifier ("FILE")
1418 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1420 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1422 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1423 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1424 types_match
= decls_match (newdecl
, olddecl
);
1426 return duplicate_decls (newdecl
, olddecl
,
1428 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1431 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1434 else if ((DECL_EXTERN_C_P (newdecl
)
1435 && DECL_EXTERN_C_P (olddecl
))
1436 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1437 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1439 /* A near match; override the builtin. */
1441 if (TREE_PUBLIC (newdecl
))
1442 warning (0, "new declaration %q+#D ambiguates built-in "
1443 "declaration %q#D", newdecl
, olddecl
);
1445 warning (OPT_Wshadow
,
1446 DECL_BUILT_IN (olddecl
)
1447 ? G_("shadowing built-in function %q#D")
1448 : G_("shadowing library function %q#D"), olddecl
);
1451 /* Discard the old built-in function. */
1454 /* Replace the old RTL to avoid problems with inlining. */
1455 COPY_DECL_RTL (newdecl
, olddecl
);
1457 /* Even if the types match, prefer the new declarations type for
1458 built-ins which have not been explicitly declared, for
1459 exception lists, etc... */
1460 else if (DECL_IS_BUILTIN (olddecl
))
1462 tree type
= TREE_TYPE (newdecl
);
1463 tree attribs
= (*targetm
.merge_type_attributes
)
1464 (TREE_TYPE (olddecl
), type
);
1466 type
= cp_build_type_attribute_variant (type
, attribs
);
1467 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1470 /* If a function is explicitly declared "throw ()", propagate that to
1471 the corresponding builtin. */
1472 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1473 && DECL_ANTICIPATED (olddecl
)
1474 && TREE_NOTHROW (newdecl
)
1475 && !TREE_NOTHROW (olddecl
))
1477 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1478 tree tmpdecl
= builtin_decl_explicit (fncode
);
1479 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1480 TREE_NOTHROW (tmpdecl
) = 1;
1483 /* Whether or not the builtin can throw exceptions has no
1484 bearing on this declarator. */
1485 TREE_NOTHROW (olddecl
) = 0;
1487 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1489 /* If a builtin function is redeclared as `static', merge
1490 the declarations, but make the original one static. */
1491 DECL_THIS_STATIC (olddecl
) = 1;
1492 TREE_PUBLIC (olddecl
) = 0;
1494 /* Make the old declaration consistent with the new one so
1495 that all remnants of the builtin-ness of this function
1496 will be banished. */
1497 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1498 COPY_DECL_RTL (newdecl
, olddecl
);
1501 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1503 /* C++ Standard, 3.3, clause 4:
1504 "[Note: a namespace name or a class template name must be unique
1505 in its declarative region (7.3.2, clause 14). ]" */
1506 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1507 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1508 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1509 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1510 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1511 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1513 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1514 && TREE_CODE (newdecl
) != TYPE_DECL
)
1515 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1516 && TREE_CODE (olddecl
) != TYPE_DECL
))
1518 /* We do nothing special here, because C++ does such nasty
1519 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1520 get shadowed, and know that if we need to find a TYPE_DECL
1521 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1522 slot of the identifier. */
1526 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1527 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1528 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1529 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1533 error ("%q#D redeclared as different kind of symbol", newdecl
);
1534 if (TREE_CODE (olddecl
) == TREE_LIST
)
1535 olddecl
= TREE_VALUE (olddecl
);
1536 inform (DECL_SOURCE_LOCATION (olddecl
),
1537 "previous declaration %q#D", olddecl
);
1539 return error_mark_node
;
1541 else if (!types_match
)
1543 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1544 /* These are certainly not duplicate declarations; they're
1545 from different scopes. */
1548 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1550 /* The name of a class template may not be declared to refer to
1551 any other template, class, function, object, namespace, value,
1552 or type in the same scope. */
1553 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1554 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1556 error ("conflicting declaration of template %q+#D", newdecl
);
1557 inform (DECL_SOURCE_LOCATION (olddecl
),
1558 "previous declaration %q#D", olddecl
);
1559 return error_mark_node
;
1561 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1562 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1563 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1564 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1565 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1566 DECL_TEMPLATE_PARMS (olddecl
))
1567 /* Template functions can be disambiguated by
1569 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1570 TREE_TYPE (TREE_TYPE (olddecl
))))
1572 error ("ambiguating new declaration %q+#D", newdecl
);
1573 inform (DECL_SOURCE_LOCATION (olddecl
),
1574 "old declaration %q#D", olddecl
);
1578 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1580 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1582 error ("conflicting declaration of C function %q+#D",
1584 inform (DECL_SOURCE_LOCATION (olddecl
),
1585 "previous declaration %q#D", olddecl
);
1588 /* For function versions, params and types match, but they
1589 are not ambiguous. */
1590 else if ((!DECL_FUNCTION_VERSIONED (newdecl
)
1591 && !DECL_FUNCTION_VERSIONED (olddecl
))
1592 && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1593 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1595 error ("ambiguating new declaration of %q+#D", newdecl
);
1596 inform (DECL_SOURCE_LOCATION (olddecl
),
1597 "old declaration %q#D", olddecl
);
1598 return error_mark_node
;
1605 error ("conflicting declaration %q+#D", newdecl
);
1606 inform (DECL_SOURCE_LOCATION (olddecl
),
1607 "previous declaration as %q#D", olddecl
);
1608 return error_mark_node
;
1611 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1612 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1613 && (!DECL_TEMPLATE_INFO (newdecl
)
1614 || (DECL_TI_TEMPLATE (newdecl
)
1615 != DECL_TI_TEMPLATE (olddecl
))))
1616 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1617 && (!DECL_TEMPLATE_INFO (olddecl
)
1618 || (DECL_TI_TEMPLATE (olddecl
)
1619 != DECL_TI_TEMPLATE (newdecl
))))))
1620 /* It's OK to have a template specialization and a non-template
1621 with the same type, or to have specializations of two
1622 different templates with the same type. Note that if one is a
1623 specialization, and the other is an instantiation of the same
1624 template, that we do not exit at this point. That situation
1625 can occur if we instantiate a template class, and then
1626 specialize one of its methods. This situation is valid, but
1627 the declarations must be merged in the usual way. */
1629 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1630 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1631 && !DECL_USE_TEMPLATE (newdecl
))
1632 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1633 && !DECL_USE_TEMPLATE (olddecl
))))
1634 /* One of the declarations is a template instantiation, and the
1635 other is not a template at all. That's OK. */
1637 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1639 /* In [namespace.alias] we have:
1641 In a declarative region, a namespace-alias-definition can be
1642 used to redefine a namespace-alias declared in that declarative
1643 region to refer only to the namespace to which it already
1646 Therefore, if we encounter a second alias directive for the same
1647 alias, we can just ignore the second directive. */
1648 if (DECL_NAMESPACE_ALIAS (newdecl
)
1649 && (DECL_NAMESPACE_ALIAS (newdecl
)
1650 == DECL_NAMESPACE_ALIAS (olddecl
)))
1652 /* [namespace.alias]
1654 A namespace-name or namespace-alias shall not be declared as
1655 the name of any other entity in the same declarative region.
1656 A namespace-name defined at global scope shall not be
1657 declared as the name of any other entity in any global scope
1659 error ("conflicting declaration of namespace %q+D", newdecl
);
1660 inform (DECL_SOURCE_LOCATION (olddecl
),
1661 "previous declaration of namespace %qD here", olddecl
);
1662 return error_mark_node
;
1666 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1669 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1670 if (DECL_NAME (olddecl
) != NULL_TREE
)
1671 inform (input_location
,
1672 (DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1673 ? G_("%q+#D previously defined here")
1674 : G_("%q+#D previously declared here"), olddecl
);
1675 return error_mark_node
;
1677 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1678 && DECL_INITIAL (olddecl
) != NULL_TREE
1679 && !prototype_p (TREE_TYPE (olddecl
))
1680 && prototype_p (TREE_TYPE (newdecl
)))
1682 /* Prototype decl follows defn w/o prototype. */
1683 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), 0,
1684 "prototype specified for %q+#D", newdecl
))
1685 inform (DECL_SOURCE_LOCATION (olddecl
),
1686 "previous non-prototype definition here");
1688 else if (VAR_OR_FUNCTION_DECL_P (olddecl
)
1689 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1692 If two declarations of the same function or object
1693 specify different linkage-specifications ..., the program
1694 is ill-formed.... Except for functions with C++ linkage,
1695 a function declaration without a linkage specification
1696 shall not precede the first linkage specification for
1697 that function. A function can be declared without a
1698 linkage specification after an explicit linkage
1699 specification has been seen; the linkage explicitly
1700 specified in the earlier declaration is not affected by
1701 such a function declaration.
1703 DR 563 raises the question why the restrictions on
1704 functions should not also apply to objects. Older
1705 versions of G++ silently ignore the linkage-specification
1713 which is clearly wrong. Therefore, we now treat objects
1715 if (current_lang_depth () == 0)
1717 /* There is no explicit linkage-specification, so we use
1718 the linkage from the previous declaration. */
1719 if (!DECL_LANG_SPECIFIC (newdecl
))
1720 retrofit_lang_decl (newdecl
);
1721 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1725 error ("conflicting declaration of %q+#D with %qL linkage",
1726 newdecl
, DECL_LANGUAGE (newdecl
));
1727 inform (DECL_SOURCE_LOCATION (olddecl
),
1728 "previous declaration with %qL linkage",
1729 DECL_LANGUAGE (olddecl
));
1733 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1735 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1737 /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
1738 if (DECL_FUNCTION_MEMBER_P (olddecl
)
1739 && (/* grokfndecl passes member function templates too
1740 as FUNCTION_DECLs. */
1741 DECL_TEMPLATE_INFO (olddecl
)
1743 Default arguments for a member function of a class
1744 template shall be specified on the initial declaration
1745 of the member function within the class template. */
1746 || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl
))))
1747 check_redeclaration_no_default_args (newdecl
);
1750 tree t1
= FUNCTION_FIRST_USER_PARMTYPE (olddecl
);
1751 tree t2
= FUNCTION_FIRST_USER_PARMTYPE (newdecl
);
1754 for (; t1
&& t1
!= void_list_node
;
1755 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1756 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1758 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1761 if (permerror (input_location
,
1762 "default argument given for parameter "
1763 "%d of %q#D", i
, newdecl
))
1764 inform (DECL_SOURCE_LOCATION (olddecl
),
1765 "previous specification in %q#D here",
1770 error ("default argument given for parameter %d "
1771 "of %q#D", i
, newdecl
);
1772 inform (DECL_SOURCE_LOCATION (olddecl
),
1773 "previous specification in %q#D here",
1781 /* Do not merge an implicit typedef with an explicit one. In:
1785 typedef class A A __attribute__ ((foo));
1787 the attribute should apply only to the typedef. */
1788 if (TREE_CODE (olddecl
) == TYPE_DECL
1789 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1790 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1793 /* If new decl is `static' and an `extern' was seen previously,
1795 warn_extern_redeclared_static (newdecl
, olddecl
);
1797 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1798 return error_mark_node
;
1800 /* We have committed to returning 1 at this point. */
1801 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1803 /* Now that functions must hold information normally held
1804 by field decls, there is extra work to do so that
1805 declaration information does not get destroyed during
1807 if (DECL_VINDEX (olddecl
))
1808 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1809 if (DECL_CONTEXT (olddecl
))
1810 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1811 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1812 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1813 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1814 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1815 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1816 DECL_FINAL_P (newdecl
) |= DECL_FINAL_P (olddecl
);
1817 DECL_OVERRIDE_P (newdecl
) |= DECL_OVERRIDE_P (olddecl
);
1818 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1819 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1820 SET_OVERLOADED_OPERATOR_CODE
1821 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1822 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1824 /* Optionally warn about more than one declaration for the same
1825 name, but don't warn about a function declaration followed by a
1827 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1828 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1829 /* Don't warn about extern decl followed by definition. */
1830 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1831 /* Don't warn about friends, let add_friend take care of it. */
1832 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1833 /* Don't warn about declaration followed by specialization. */
1834 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1835 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1837 if (warning (OPT_Wredundant_decls
,
1838 "redundant redeclaration of %q+D in same scope",
1840 inform (DECL_SOURCE_LOCATION (olddecl
),
1841 "previous declaration of %qD", olddecl
);
1844 if (!(DECL_TEMPLATE_INSTANTIATION (olddecl
)
1845 && DECL_TEMPLATE_SPECIALIZATION (newdecl
)))
1847 if (DECL_DELETED_FN (newdecl
))
1849 error ("deleted definition of %q+D", newdecl
);
1850 inform (DECL_SOURCE_LOCATION (olddecl
),
1851 "previous declaration of %qD", olddecl
);
1853 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1857 /* Deal with C++: must preserve virtual function table size. */
1858 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1860 tree newtype
= TREE_TYPE (newdecl
);
1861 tree oldtype
= TREE_TYPE (olddecl
);
1863 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1864 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1865 CLASSTYPE_FRIEND_CLASSES (newtype
)
1866 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1868 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1871 /* Copy all the DECL_... slots specified in the new decl
1872 except for any that we copy here from the old type. */
1873 DECL_ATTRIBUTES (newdecl
)
1874 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1876 if (DECL_DECLARES_FUNCTION_P (olddecl
) && DECL_DECLARES_FUNCTION_P (newdecl
))
1878 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1879 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1880 && DECL_HIDDEN_FRIEND_P (olddecl
)
1881 && newdecl_is_friend
);
1884 DECL_ANTICIPATED (olddecl
) = 0;
1885 DECL_HIDDEN_FRIEND_P (olddecl
) = 0;
1889 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1893 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1894 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1895 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1896 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1897 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1898 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1900 DECL_ATTRIBUTES (old_result
)
1901 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1903 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1905 /* Per C++11 8.3.6/4, default arguments cannot be added in later
1906 declarations of a function template. */
1907 if (DECL_SOURCE_LOCATION (newdecl
)
1908 != DECL_SOURCE_LOCATION (olddecl
))
1909 check_redeclaration_no_default_args (newdecl
);
1911 check_default_args (newdecl
);
1913 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1914 && DECL_INITIAL (new_result
))
1916 if (DECL_INITIAL (old_result
))
1917 DECL_UNINLINABLE (old_result
) = 1;
1919 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1920 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1921 DECL_NOT_REALLY_EXTERN (old_result
)
1922 = DECL_NOT_REALLY_EXTERN (new_result
);
1923 DECL_INTERFACE_KNOWN (old_result
)
1924 = DECL_INTERFACE_KNOWN (new_result
);
1925 DECL_DECLARED_INLINE_P (old_result
)
1926 = DECL_DECLARED_INLINE_P (new_result
);
1927 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1928 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1933 DECL_DECLARED_INLINE_P (old_result
)
1934 |= DECL_DECLARED_INLINE_P (new_result
);
1935 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1936 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1937 check_redeclaration_exception_specification (newdecl
, olddecl
);
1941 /* If the new declaration is a definition, update the file and
1942 line information on the declaration, and also make
1943 the old declaration the same definition. */
1944 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1946 DECL_SOURCE_LOCATION (olddecl
)
1947 = DECL_SOURCE_LOCATION (old_result
)
1948 = DECL_SOURCE_LOCATION (newdecl
);
1949 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1950 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1953 DECL_ARGUMENTS (old_result
)
1954 = DECL_ARGUMENTS (new_result
);
1955 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1956 parm
= DECL_CHAIN (parm
))
1957 DECL_CONTEXT (parm
) = old_result
;
1966 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1967 check_redeclaration_exception_specification (newdecl
, olddecl
);
1969 /* Automatically handles default parameters. */
1970 tree oldtype
= TREE_TYPE (olddecl
);
1973 /* For typedefs use the old type, as the new type's DECL_NAME points
1974 at newdecl, which will be ggc_freed. */
1975 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1978 /* Merge the data types specified in the two decls. */
1979 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1981 if (VAR_P (newdecl
))
1983 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1984 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1985 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1986 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1987 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1988 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1990 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1991 if (DECL_LANG_SPECIFIC (olddecl
)
1992 && CP_DECL_THREADPRIVATE_P (olddecl
))
1994 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1995 if (!DECL_LANG_SPECIFIC (newdecl
))
1996 retrofit_lang_decl (newdecl
);
1998 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
2002 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
2004 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2005 check_default_args (newdecl
);
2007 /* Lay the type out, unless already done. */
2008 if (! same_type_p (newtype
, oldtype
)
2009 && TREE_TYPE (newdecl
) != error_mark_node
2010 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2011 layout_type (TREE_TYPE (newdecl
));
2013 if ((VAR_P (newdecl
)
2014 || TREE_CODE (newdecl
) == PARM_DECL
2015 || TREE_CODE (newdecl
) == RESULT_DECL
2016 || TREE_CODE (newdecl
) == FIELD_DECL
2017 || TREE_CODE (newdecl
) == TYPE_DECL
)
2018 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
2019 layout_decl (newdecl
, 0);
2021 /* Merge the type qualifiers. */
2022 if (TREE_READONLY (newdecl
))
2023 TREE_READONLY (olddecl
) = 1;
2024 if (TREE_THIS_VOLATILE (newdecl
))
2025 TREE_THIS_VOLATILE (olddecl
) = 1;
2026 if (TREE_NOTHROW (newdecl
))
2027 TREE_NOTHROW (olddecl
) = 1;
2029 /* Merge deprecatedness. */
2030 if (TREE_DEPRECATED (newdecl
))
2031 TREE_DEPRECATED (olddecl
) = 1;
2033 /* Preserve function specific target and optimization options */
2034 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2036 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
2037 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
2038 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
2039 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
2041 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
2042 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
2043 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
2044 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
2047 /* Merge the initialization information. */
2048 if (DECL_INITIAL (newdecl
) == NULL_TREE
2049 && DECL_INITIAL (olddecl
) != NULL_TREE
)
2051 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
2052 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
2053 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2055 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
2056 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
2060 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2062 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
2063 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
2064 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
2065 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
2066 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
2067 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
2068 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
2069 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
2070 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
2071 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
2072 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
2073 /* Keep the old RTL. */
2074 COPY_DECL_RTL (olddecl
, newdecl
);
2076 else if (VAR_P (newdecl
)
2077 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
2079 /* Keep the old RTL. We cannot keep the old RTL if the old
2080 declaration was for an incomplete object and the new
2081 declaration is not since many attributes of the RTL will
2083 COPY_DECL_RTL (olddecl
, newdecl
);
2086 /* If cannot merge, then use the new type and qualifiers,
2087 and don't preserve the old rtl. */
2090 /* Clean out any memory we had of the old declaration. */
2091 tree oldstatic
= value_member (olddecl
, static_aggregates
);
2093 TREE_VALUE (oldstatic
) = error_mark_node
;
2095 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
2096 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
2097 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
2098 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
2101 /* Merge the storage class information. */
2102 merge_weak (newdecl
, olddecl
);
2104 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
2105 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
2106 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
2107 if (! DECL_EXTERNAL (olddecl
))
2108 DECL_EXTERNAL (newdecl
) = 0;
2110 new_template_info
= NULL_TREE
;
2111 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
2113 bool new_redefines_gnu_inline
= false;
2115 if (new_defines_function
2116 && ((DECL_INTERFACE_KNOWN (olddecl
)
2117 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
2118 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
2119 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
2120 == FUNCTION_DECL
))))
2124 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
2125 fn
= DECL_TEMPLATE_RESULT (olddecl
);
2127 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
2130 if (!new_redefines_gnu_inline
)
2132 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
2133 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
2134 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
2136 DECL_TEMPLATE_INSTANTIATED (newdecl
)
2137 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
2138 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
2140 /* If the OLDDECL is an instantiation and/or specialization,
2141 then the NEWDECL must be too. But, it may not yet be marked
2142 as such if the caller has created NEWDECL, but has not yet
2143 figured out that it is a redeclaration. */
2144 if (!DECL_USE_TEMPLATE (newdecl
))
2145 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2147 /* Don't really know how much of the language-specific
2148 values we should copy from old to new. */
2149 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2150 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2151 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2152 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2154 if (LANG_DECL_HAS_MIN (newdecl
))
2156 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2157 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2158 if (DECL_TEMPLATE_INFO (newdecl
))
2160 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2161 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2162 && DECL_TEMPLATE_SPECIALIZATION (newdecl
))
2163 /* Remember the presence of explicit specialization args. */
2164 TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl
))
2165 = TINFO_USED_TEMPLATE_ID (new_template_info
);
2167 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2169 /* Only functions have these fields. */
2170 if (DECL_DECLARES_FUNCTION_P (newdecl
))
2172 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2173 DECL_BEFRIENDING_CLASSES (newdecl
)
2174 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2175 DECL_BEFRIENDING_CLASSES (olddecl
));
2176 /* DECL_THUNKS is only valid for virtual functions,
2177 otherwise it is a DECL_FRIEND_CONTEXT. */
2178 if (DECL_VIRTUAL_P (newdecl
))
2179 SET_DECL_THUNKS (newdecl
, DECL_THUNKS (olddecl
));
2181 /* Only variables have this field. */
2182 else if (VAR_P (newdecl
)
2183 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2184 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2187 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2191 /* Merge parameter attributes. */
2192 tree oldarg
, newarg
;
2193 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2194 newarg
= DECL_ARGUMENTS(newdecl
);
2196 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2197 DECL_ATTRIBUTES (newarg
)
2198 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2199 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2202 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2203 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2205 /* If newdecl is not a specialization, then it is not a
2206 template-related function at all. And that means that we
2207 should have exited above, returning 0. */
2208 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2210 if (DECL_ODR_USED (olddecl
))
2211 /* From [temp.expl.spec]:
2213 If a template, a member template or the member of a class
2214 template is explicitly specialized then that
2215 specialization shall be declared before the first use of
2216 that specialization that would cause an implicit
2217 instantiation to take place, in every translation unit in
2218 which such a use occurs. */
2219 error ("explicit specialization of %qD after first use",
2222 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2223 DECL_COMDAT (newdecl
) = (TREE_PUBLIC (newdecl
)
2224 && DECL_DECLARED_INLINE_P (newdecl
));
2226 /* Don't propagate visibility from the template to the
2227 specialization here. We'll do that in determine_visibility if
2229 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2231 /* [temp.expl.spec/14] We don't inline explicit specialization
2232 just because the primary template says so. */
2234 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2235 the always_inline attribute. */
2236 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2237 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2239 if (DECL_DECLARED_INLINE_P (newdecl
))
2240 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2242 DECL_ATTRIBUTES (newdecl
)
2243 = remove_attribute ("always_inline",
2244 DECL_ATTRIBUTES (newdecl
));
2247 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2249 /* Never inline re-defined extern inline functions.
2250 FIXME: this could be better handled by keeping both
2251 function as separate declarations. */
2252 DECL_UNINLINABLE (newdecl
) = 1;
2256 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2257 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2259 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2261 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2262 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2264 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2265 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2266 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2267 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2270 /* Preserve abstractness on cloned [cd]tors. */
2271 DECL_ABSTRACT_P (newdecl
) = DECL_ABSTRACT_P (olddecl
);
2273 /* Update newdecl's parms to point at olddecl. */
2274 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2275 parm
= DECL_CHAIN (parm
))
2276 DECL_CONTEXT (parm
) = olddecl
;
2280 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2281 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2282 COPY_DECL_RTL (newdecl
, olddecl
);
2284 if (! types_match
|| new_defines_function
)
2286 /* These need to be copied so that the names are available.
2287 Note that if the types do match, we'll preserve inline
2288 info and other bits, but if not, we won't. */
2289 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2290 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2292 /* If redeclaring a builtin function, it stays built in
2293 if newdecl is a gnu_inline definition, or if newdecl is just
2295 if (DECL_BUILT_IN (olddecl
)
2296 && (new_defines_function
? GNU_INLINE_P (newdecl
) : types_match
))
2298 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2299 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2300 /* If we're keeping the built-in definition, keep the rtl,
2301 regardless of declaration matches. */
2302 COPY_DECL_RTL (olddecl
, newdecl
);
2303 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2305 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2308 /* If a compatible prototype of these builtin functions
2309 is seen, assume the runtime implements it with the
2310 expected semantics. */
2311 case BUILT_IN_STPCPY
:
2312 if (builtin_decl_explicit_p (fncode
))
2313 set_builtin_decl_implicit_p (fncode
, true);
2316 if (builtin_decl_explicit_p (fncode
))
2317 set_builtin_decl_declared_p (fncode
, true);
2322 if (new_defines_function
)
2323 /* If defining a function declared with other language
2324 linkage, use the previously declared language linkage. */
2325 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2326 else if (types_match
)
2328 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2329 /* Don't clear out the arguments if we're just redeclaring a
2331 if (DECL_ARGUMENTS (olddecl
))
2332 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2335 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2336 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2338 /* Now preserve various other info from the definition. */
2339 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2340 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2341 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2342 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2344 /* Warn about conflicting visibility specifications. */
2345 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2346 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2347 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2349 if (warning_at (DECL_SOURCE_LOCATION (newdecl
), OPT_Wattributes
,
2350 "%qD: visibility attribute ignored because it "
2351 "conflicts with previous declaration", newdecl
))
2352 inform (DECL_SOURCE_LOCATION (olddecl
),
2353 "previous declaration of %qD", olddecl
);
2355 /* Choose the declaration which specified visibility. */
2356 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2358 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2359 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2361 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2362 so keep this behavior. */
2363 if (VAR_P (newdecl
) && DECL_HAS_INIT_PRIORITY_P (newdecl
))
2365 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2366 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2368 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2369 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2371 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2372 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2374 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2375 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2376 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2378 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2379 with that from NEWDECL below. */
2380 if (DECL_LANG_SPECIFIC (olddecl
))
2382 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2383 != DECL_LANG_SPECIFIC (newdecl
));
2384 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2387 /* Merge the USED information. */
2388 if (TREE_USED (olddecl
))
2389 TREE_USED (newdecl
) = 1;
2390 else if (TREE_USED (newdecl
))
2391 TREE_USED (olddecl
) = 1;
2392 if (VAR_P (newdecl
))
2394 if (DECL_READ_P (olddecl
))
2395 DECL_READ_P (newdecl
) = 1;
2396 else if (DECL_READ_P (newdecl
))
2397 DECL_READ_P (olddecl
) = 1;
2399 if (DECL_PRESERVE_P (olddecl
))
2400 DECL_PRESERVE_P (newdecl
) = 1;
2401 else if (DECL_PRESERVE_P (newdecl
))
2402 DECL_PRESERVE_P (olddecl
) = 1;
2404 /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
2405 to olddecl and deleted. */
2406 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2407 && DECL_FUNCTION_VERSIONED (olddecl
))
2409 /* Set the flag for newdecl so that it gets copied to olddecl. */
2410 DECL_FUNCTION_VERSIONED (newdecl
) = 1;
2411 /* newdecl will be purged after copying to olddecl and is no longer
2413 cgraph_node::delete_function_version (newdecl
);
2416 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2419 struct symtab_node
*snode
= symtab_node::get (olddecl
);
2421 function_size
= sizeof (struct tree_decl_common
);
2423 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2424 (char *) newdecl
+ sizeof (struct tree_common
),
2425 function_size
- sizeof (struct tree_common
));
2427 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2428 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2429 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2431 /* Preserve symtab node mapping. */
2432 olddecl
->decl_with_vis
.symtab_node
= snode
;
2434 if (new_template_info
)
2435 /* If newdecl is a template instantiation, it is possible that
2436 the following sequence of events has occurred:
2438 o A friend function was declared in a class template. The
2439 class template was instantiated.
2441 o The instantiation of the friend declaration was
2442 recorded on the instantiation list, and is newdecl.
2444 o Later, however, instantiate_class_template called pushdecl
2445 on the newdecl to perform name injection. But, pushdecl in
2446 turn called duplicate_decls when it discovered that another
2447 declaration of a global function with the same name already
2450 o Here, in duplicate_decls, we decided to clobber newdecl.
2452 If we're going to do that, we'd better make sure that
2453 olddecl, and not newdecl, is on the list of
2454 instantiations so that if we try to do the instantiation
2455 again we won't get the clobbered declaration. */
2456 reregister_specialization (newdecl
,
2462 size_t size
= tree_code_size (TREE_CODE (newdecl
));
2464 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2465 (char *) newdecl
+ sizeof (struct tree_common
),
2466 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2467 switch (TREE_CODE (newdecl
))
2477 struct symtab_node
*snode
= NULL
;
2479 if (TREE_CODE (newdecl
) == VAR_DECL
2480 && (TREE_STATIC (olddecl
) || TREE_PUBLIC (olddecl
) || 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 (TREE_CODE (newdecl
) == VAR_DECL
)
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 (TREE_CODE (newdecl
) == FUNCTION_DECL
2500 || TREE_CODE (newdecl
) == VAR_DECL
)
2502 if (DECL_EXTERNAL (olddecl
)
2503 || TREE_PUBLIC (olddecl
)
2504 || TREE_STATIC (olddecl
))
2506 /* Merge the section attribute.
2507 We want to issue an error if the sections conflict but that must be
2508 done later in decl_attributes since we are called before attributes
2510 if (DECL_SECTION_NAME (newdecl
) != NULL
)
2511 set_decl_section_name (olddecl
, DECL_SECTION_NAME (newdecl
));
2513 if (DECL_ONE_ONLY (newdecl
))
2515 struct symtab_node
*oldsym
, *newsym
;
2516 if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
2517 oldsym
= cgraph_node::get_create (olddecl
);
2519 oldsym
= varpool_node::get_create (olddecl
);
2520 newsym
= symtab_node::get (newdecl
);
2521 oldsym
->set_comdat_group (newsym
->get_comdat_group ());
2525 if (TREE_CODE (newdecl
) == VAR_DECL
2526 && DECL_THREAD_LOCAL_P (newdecl
))
2527 set_decl_tls_model (olddecl
, DECL_TLS_MODEL (newdecl
));
2530 DECL_UID (olddecl
) = olddecl_uid
;
2532 DECL_FRIEND_P (olddecl
) = 1;
2535 DECL_ANTICIPATED (olddecl
) = 1;
2536 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2539 /* NEWDECL contains the merged attribute lists.
2540 Update OLDDECL to be the same. */
2541 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2543 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2544 so that encode_section_info has a chance to look at the new decl
2545 flags and attributes. */
2546 if (DECL_RTL_SET_P (olddecl
)
2547 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2549 && TREE_STATIC (olddecl
))))
2550 make_decl_rtl (olddecl
);
2552 /* The NEWDECL will no longer be needed. Because every out-of-class
2553 declaration of a member results in a call to duplicate_decls,
2554 freeing these nodes represents in a significant savings.
2556 Before releasing the node, be sore to remove function from symbol
2557 table that might have been inserted there to record comdat group.
2558 Be sure to however do not free DECL_STRUCT_FUNCTION becuase this
2559 structure is shared in between newdecl and oldecl. */
2560 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2561 DECL_STRUCT_FUNCTION (newdecl
) = NULL
;
2562 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2563 || TREE_CODE (newdecl
) == VAR_DECL
)
2565 struct symtab_node
*snode
= symtab_node::get (newdecl
);
2574 /* Return zero if the declaration NEWDECL is valid
2575 when the declaration OLDDECL (assumed to be for the same name)
2576 has already been seen.
2577 Otherwise return an error message format string with a %s
2578 where the identifier should go. */
2581 redeclaration_error_message (tree newdecl
, tree olddecl
)
2583 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2585 /* Because C++ can put things into name space for free,
2586 constructs like "typedef struct foo { ... } foo"
2587 would look like an erroneous redeclaration. */
2588 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2591 return G_("redefinition of %q#D");
2593 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2595 /* If this is a pure function, its olddecl will actually be
2596 the original initialization to `0' (which we force to call
2597 abort()). Don't complain about redefinition in this case. */
2598 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2599 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2602 /* If both functions come from different namespaces, this is not
2603 a redeclaration - this is a conflict with a used function. */
2604 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2605 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2606 && ! decls_match (olddecl
, newdecl
))
2607 return G_("%qD conflicts with used function");
2609 /* We'll complain about linkage mismatches in
2610 warn_extern_redeclared_static. */
2612 /* Defining the same name twice is no good. */
2613 if (DECL_INITIAL (olddecl
) != NULL_TREE
2614 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2616 if (DECL_NAME (olddecl
) == NULL_TREE
)
2617 return G_("%q#D not declared in class");
2618 else if (!GNU_INLINE_P (olddecl
)
2619 || GNU_INLINE_P (newdecl
))
2620 return G_("redefinition of %q#D");
2623 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2625 bool olda
= GNU_INLINE_P (olddecl
);
2626 bool newa
= GNU_INLINE_P (newdecl
);
2631 return G_("%q+D redeclared inline with "
2632 "%<gnu_inline%> attribute");
2634 return G_("%q+D redeclared inline without "
2635 "%<gnu_inline%> attribute");
2639 check_abi_tag_redeclaration
2640 (olddecl
, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl
)),
2641 lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl
)));
2645 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2649 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2651 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2652 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2653 return G_("redefinition of %q#D");
2657 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2658 || (DECL_TEMPLATE_RESULT (newdecl
)
2659 == DECL_TEMPLATE_RESULT (olddecl
)))
2662 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2663 if (DECL_TEMPLATE_INFO (nt
))
2664 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2665 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2666 if (DECL_TEMPLATE_INFO (ot
))
2667 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2668 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2669 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2670 return G_("redefinition of %q#D");
2672 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2674 bool olda
= GNU_INLINE_P (ot
);
2675 bool newa
= GNU_INLINE_P (nt
);
2680 return G_("%q+D redeclared inline with "
2681 "%<gnu_inline%> attribute");
2683 return G_("%q+D redeclared inline without "
2684 "%<gnu_inline%> attribute");
2688 /* Core issue #226 (C++0x):
2690 If a friend function template declaration specifies a
2691 default template-argument, that declaration shall be a
2692 definition and shall be the only declaration of the
2693 function template in the translation unit. */
2694 if ((cxx_dialect
!= cxx98
)
2695 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2696 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2697 /*is_primary=*/true,
2698 /*is_partial=*/false,
2699 /*is_friend_decl=*/2))
2700 return G_("redeclaration of friend %q#D "
2701 "may not have default template arguments");
2705 else if (VAR_P (newdecl
)
2706 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2707 && (! DECL_LANG_SPECIFIC (olddecl
)
2708 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2709 || DECL_THREAD_LOCAL_P (newdecl
)))
2711 /* Only variables can be thread-local, and all declarations must
2712 agree on this property. */
2713 if (DECL_THREAD_LOCAL_P (newdecl
))
2714 return G_("thread-local declaration of %q#D follows "
2715 "non-thread-local declaration");
2717 return G_("non-thread-local declaration of %q#D follows "
2718 "thread-local declaration");
2720 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2722 /* The objects have been declared at namespace scope. If either
2723 is a member of an anonymous union, then this is an invalid
2724 redeclaration. For example:
2730 if ((VAR_P (newdecl
) && DECL_ANON_UNION_VAR_P (newdecl
))
2731 || (VAR_P (olddecl
) && DECL_ANON_UNION_VAR_P (olddecl
)))
2732 return G_("redeclaration of %q#D");
2733 /* If at least one declaration is a reference, there is no
2734 conflict. For example:
2740 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2742 /* Reject two definitions. */
2743 return G_("redefinition of %q#D");
2747 /* Objects declared with block scope: */
2748 /* Reject two definitions, and reject a definition
2749 together with an external reference. */
2750 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2751 return G_("redeclaration of %q#D");
2756 /* Hash and equality functions for the named_label table. */
2759 named_label_hasher::hash (named_label_entry
*ent
)
2761 return DECL_UID (ent
->label_decl
);
2765 named_label_hasher::equal (named_label_entry
*a
, named_label_entry
*b
)
2767 return a
->label_decl
== b
->label_decl
;
2770 /* Create a new label, named ID. */
2773 make_label_decl (tree id
, int local_p
)
2775 struct named_label_entry
*ent
;
2778 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2780 DECL_CONTEXT (decl
) = current_function_decl
;
2781 DECL_MODE (decl
) = VOIDmode
;
2782 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2784 /* Say where one reference is to the label, for the sake of the
2785 error if it is not defined. */
2786 DECL_SOURCE_LOCATION (decl
) = input_location
;
2788 /* Record the fact that this identifier is bound to this label. */
2789 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2791 /* Create the label htab for the function on demand. */
2793 named_labels
= hash_table
<named_label_hasher
>::create_ggc (13);
2795 /* Record this label on the list of labels used in this function.
2796 We do this before calling make_label_decl so that we get the
2797 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2798 ent
= ggc_cleared_alloc
<named_label_entry
> ();
2799 ent
->label_decl
= decl
;
2801 named_label_entry
**slot
= named_labels
->find_slot (ent
, INSERT
);
2802 gcc_assert (*slot
== NULL
);
2808 /* Look for a label named ID in the current function. If one cannot
2809 be found, create one. (We keep track of used, but undefined,
2810 labels, and complain about them at the end of a function.) */
2813 lookup_label_1 (tree id
)
2817 /* You can't use labels at global scope. */
2818 if (current_function_decl
== NULL_TREE
)
2820 error ("label %qE referenced outside of any function", id
);
2824 /* See if we've already got this label. */
2825 decl
= IDENTIFIER_LABEL_VALUE (id
);
2826 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2829 decl
= make_label_decl (id
, /*local_p=*/0);
2833 /* Wrapper for lookup_label_1. */
2836 lookup_label (tree id
)
2839 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2840 ret
= lookup_label_1 (id
);
2841 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2845 /* Declare a local label named ID. */
2848 declare_local_label (tree id
)
2851 cp_label_binding bind
;
2853 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2854 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2855 bind
.prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2857 decl
= make_label_decl (id
, /*local_p=*/1);
2859 vec_safe_push (current_binding_level
->shadowed_labels
, bind
);
2864 /* Returns nonzero if it is ill-formed to jump past the declaration of
2865 DECL. Returns 2 if it's also a real problem. */
2868 decl_jump_unsafe (tree decl
)
2870 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2871 with automatic storage duration is not in scope to a point where it is
2872 in scope is ill-formed unless the variable has scalar type, class type
2873 with a trivial default constructor and a trivial destructor, a
2874 cv-qualified version of one of these types, or an array of one of the
2875 preceding types and is declared without an initializer (8.5). */
2876 tree type
= TREE_TYPE (decl
);
2878 if (!VAR_P (decl
) || TREE_STATIC (decl
)
2879 || type
== error_mark_node
)
2882 if (DECL_NONTRIVIALLY_INITIALIZED_P (decl
)
2883 || variably_modified_type_p (type
, NULL_TREE
))
2886 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
2892 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2895 identify_goto (tree decl
, const location_t
*locus
)
2897 bool complained
= (decl
2898 ? permerror (input_location
, "jump to label %qD", decl
)
2899 : permerror (input_location
, "jump to case label"));
2900 if (complained
&& locus
)
2901 inform (*locus
, " from here");
2905 /* Check that a single previously seen jump to a newly defined label
2906 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2907 the jump context; NAMES are the names in scope in LEVEL at the jump
2908 context; LOCUS is the source position of the jump or 0. Returns
2909 true if all is well. */
2912 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2913 bool exited_omp
, const location_t
*locus
)
2915 cp_binding_level
*b
;
2916 bool identified
= false, complained
= false;
2917 bool saw_eh
= false, saw_omp
= false;
2921 complained
= identify_goto (decl
, locus
);
2923 inform (input_location
, " exits OpenMP structured block");
2924 identified
= saw_omp
= true;
2927 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2929 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2931 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2932 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2933 : TREE_CHAIN (new_decls
)))
2935 int problem
= decl_jump_unsafe (new_decls
);
2941 complained
= identify_goto (decl
, locus
);
2947 inform (input_location
,
2948 " crosses initialization of %q+#D", new_decls
);
2950 inform (input_location
, " enters scope of %q+#D which has "
2951 "non-trivial destructor", new_decls
);
2957 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2961 complained
= identify_goto (decl
, locus
);
2966 if (b
->kind
== sk_try
)
2967 inform (input_location
, " enters try block");
2969 inform (input_location
, " enters catch block");
2973 if (b
->kind
== sk_omp
&& !saw_omp
)
2977 complained
= identify_goto (decl
, locus
);
2981 inform (input_location
, " enters OpenMP structured block");
2990 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2992 check_previous_goto_1 (decl
, use
->binding_level
,
2993 use
->names_in_scope
, use
->in_omp_scope
,
2994 &use
->o_goto_locus
);
2998 check_switch_goto (cp_binding_level
* level
)
3000 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
3003 /* Check that a new jump to a label DECL is OK. Called by
3004 finish_goto_stmt. */
3007 check_goto (tree decl
)
3009 struct named_label_entry
*ent
, dummy
;
3010 bool saw_catch
= false, identified
= false, complained
= false;
3014 /* We can't know where a computed goto is jumping.
3015 So we assume that it's OK. */
3016 if (TREE_CODE (decl
) != LABEL_DECL
)
3019 /* We didn't record any information about this label when we created it,
3020 and there's not much point since it's trivial to analyze as a return. */
3021 if (decl
== cdtor_label
)
3024 dummy
.label_decl
= decl
;
3025 ent
= named_labels
->find (&dummy
);
3026 gcc_assert (ent
!= NULL
);
3028 /* If the label hasn't been defined yet, defer checking. */
3029 if (! DECL_INITIAL (decl
))
3031 struct named_label_use_entry
*new_use
;
3033 /* Don't bother creating another use if the last goto had the
3034 same data, and will therefore create the same set of errors. */
3036 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
3039 new_use
= ggc_alloc
<named_label_use_entry
> ();
3040 new_use
->binding_level
= current_binding_level
;
3041 new_use
->names_in_scope
= current_binding_level
->names
;
3042 new_use
->o_goto_locus
= input_location
;
3043 new_use
->in_omp_scope
= false;
3045 new_use
->next
= ent
->uses
;
3046 ent
->uses
= new_use
;
3050 if (ent
->in_try_scope
|| ent
->in_catch_scope
3051 || ent
->in_omp_scope
|| !vec_safe_is_empty (ent
->bad_decls
))
3053 complained
= permerror (input_location
, "jump to label %q+D", decl
);
3055 inform (input_location
, " from here");
3059 FOR_EACH_VEC_SAFE_ELT (ent
->bad_decls
, ix
, bad
)
3061 int u
= decl_jump_unsafe (bad
);
3063 if (u
> 1 && DECL_ARTIFICIAL (bad
))
3065 /* Can't skip init of __exception_info. */
3067 inform (DECL_SOURCE_LOCATION (bad
), " enters catch block");
3070 else if (complained
)
3073 inform (input_location
, " skips initialization of %q+#D", bad
);
3075 inform (input_location
, " enters scope of %q+#D which has "
3076 "non-trivial destructor", bad
);
3082 if (ent
->in_try_scope
)
3083 inform (input_location
, " enters try block");
3084 else if (ent
->in_catch_scope
&& !saw_catch
)
3085 inform (input_location
, " enters catch block");
3088 if (ent
->in_omp_scope
)
3091 inform (input_location
, " enters OpenMP structured block");
3093 else if (flag_openmp
)
3095 cp_binding_level
*b
;
3096 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3098 if (b
== ent
->binding_level
)
3100 if (b
->kind
== sk_omp
)
3104 complained
= permerror (input_location
,
3105 "jump to label %q+D", decl
);
3107 inform (input_location
, " from here");
3111 inform (input_location
, " exits OpenMP structured block");
3118 /* Check that a return is ok wrt OpenMP structured blocks.
3119 Called by finish_return_stmt. Returns true if all is well. */
3122 check_omp_return (void)
3124 cp_binding_level
*b
;
3125 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
3126 if (b
->kind
== sk_omp
)
3128 error ("invalid exit from OpenMP structured block");
3131 else if (b
->kind
== sk_function_parms
)
3136 /* Define a label, specifying the location in the source file.
3137 Return the LABEL_DECL node for the label. */
3140 define_label_1 (location_t location
, tree name
)
3142 struct named_label_entry
*ent
, dummy
;
3143 cp_binding_level
*p
;
3146 decl
= lookup_label (name
);
3148 dummy
.label_decl
= decl
;
3149 ent
= named_labels
->find (&dummy
);
3150 gcc_assert (ent
!= NULL
);
3152 /* After labels, make any new cleanups in the function go into their
3153 own new (temporary) binding contour. */
3154 for (p
= current_binding_level
;
3155 p
->kind
!= sk_function_parms
;
3157 p
->more_cleanups_ok
= 0;
3159 if (name
== get_identifier ("wchar_t"))
3160 permerror (input_location
, "label named wchar_t");
3162 if (DECL_INITIAL (decl
) != NULL_TREE
)
3164 error ("duplicate label %qD", decl
);
3165 return error_mark_node
;
3169 struct named_label_use_entry
*use
;
3171 /* Mark label as having been defined. */
3172 DECL_INITIAL (decl
) = error_mark_node
;
3173 /* Say where in the source. */
3174 DECL_SOURCE_LOCATION (decl
) = location
;
3176 ent
->binding_level
= current_binding_level
;
3177 ent
->names_in_scope
= current_binding_level
->names
;
3179 for (use
= ent
->uses
; use
; use
= use
->next
)
3180 check_previous_goto (decl
, use
);
3187 /* Wrapper for define_label_1. */
3190 define_label (location_t location
, tree name
)
3193 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
3194 ret
= define_label_1 (location
, name
);
3195 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
3202 cp_binding_level
*level
;
3203 struct cp_switch
*next
;
3204 /* The SWITCH_STMT being built. */
3206 /* A splay-tree mapping the low element of a case range to the high
3207 element, or NULL_TREE if there is no high element. Used to
3208 determine whether or not a new case label duplicates an old case
3209 label. We need a tree, rather than simply a hash table, because
3210 of the GNU case range extension. */
3214 /* A stack of the currently active switch statements. The innermost
3215 switch statement is on the top of the stack. There is no need to
3216 mark the stack for garbage collection because it is only active
3217 during the processing of the body of a function, and we never
3218 collect at that point. */
3220 static struct cp_switch
*switch_stack
;
3222 /* Called right after a switch-statement condition is parsed.
3223 SWITCH_STMT is the switch statement being parsed. */
3226 push_switch (tree switch_stmt
)
3228 struct cp_switch
*p
= XNEW (struct cp_switch
);
3229 p
->level
= current_binding_level
;
3230 p
->next
= switch_stack
;
3231 p
->switch_stmt
= switch_stmt
;
3232 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
3239 struct cp_switch
*cs
= switch_stack
;
3240 location_t switch_location
;
3242 /* Emit warnings as needed. */
3243 switch_location
= EXPR_LOC_OR_LOC (cs
->switch_stmt
, input_location
);
3244 if (!processing_template_decl
)
3245 c_do_switch_warnings (cs
->cases
, switch_location
,
3246 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3247 SWITCH_STMT_COND (cs
->switch_stmt
));
3249 splay_tree_delete (cs
->cases
);
3250 switch_stack
= switch_stack
->next
;
3254 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3255 condition. Note that if TYPE and VALUE are already integral we don't
3256 really do the conversion because the language-independent
3257 warning/optimization code will work better that way. */
3260 case_conversion (tree type
, tree value
)
3262 if (value
== NULL_TREE
)
3265 if (cxx_dialect
>= cxx11
3266 && (SCOPED_ENUM_P (type
)
3267 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3269 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3270 type
= type_promotes_to (type
);
3271 value
= (perform_implicit_conversion_flags
3272 (type
, value
, tf_warning_or_error
,
3273 LOOKUP_IMPLICIT
| LOOKUP_NO_NON_INTEGRAL
));
3275 return cxx_constant_value (value
);
3278 /* Note that we've seen a definition of a case label, and complain if this
3279 is a bad place for one. */
3282 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3285 cp_binding_level
*p
;
3288 if (processing_template_decl
)
3292 /* For templates, just add the case label; we'll do semantic
3293 analysis at instantiation-time. */
3294 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3295 return add_stmt (build_case_label (low_value
, high_value
, label
));
3298 /* Find the condition on which this switch statement depends. */
3299 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3300 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3301 cond
= TREE_VALUE (cond
);
3303 if (!check_switch_goto (switch_stack
->level
))
3304 return error_mark_node
;
3306 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3308 low_value
= case_conversion (type
, low_value
);
3309 high_value
= case_conversion (type
, high_value
);
3311 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3312 low_value
, high_value
);
3314 /* After labels, make any new cleanups in the function go into their
3315 own new (temporary) binding contour. */
3316 for (p
= current_binding_level
;
3317 p
->kind
!= sk_function_parms
;
3319 p
->more_cleanups_ok
= 0;
3324 struct typename_info
{
3332 struct typename_hasher
: ggc_hasher
<tree
>
3334 typedef typename_info
*compare_type
;
3336 /* Hash a TYPENAME_TYPE. */
3343 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3344 ^ htab_hash_pointer (TYPE_IDENTIFIER (t
)));
3349 /* Compare two TYPENAME_TYPEs. */
3352 equal (tree t1
, const typename_info
*t2
)
3354 return (TYPE_IDENTIFIER (t1
) == t2
->name
3355 && TYPE_CONTEXT (t1
) == t2
->scope
3356 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3357 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3358 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3362 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3363 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3365 Returns the new TYPENAME_TYPE. */
3367 static GTY (()) hash_table
<typename_hasher
> *typename_htab
;
3370 build_typename_type (tree context
, tree name
, tree fullname
,
3371 enum tag_types tag_type
)
3379 if (typename_htab
== NULL
)
3380 typename_htab
= hash_table
<typename_hasher
>::create_ggc (61);
3382 ti
.scope
= FROB_CONTEXT (context
);
3384 ti
.template_id
= fullname
;
3385 ti
.enum_p
= tag_type
== enum_type
;
3386 ti
.class_p
= (tag_type
== class_type
3387 || tag_type
== record_type
3388 || tag_type
== union_type
);
3389 hash
= (htab_hash_pointer (ti
.scope
)
3390 ^ htab_hash_pointer (ti
.name
));
3392 /* See if we already have this type. */
3393 e
= typename_htab
->find_slot_with_hash (&ti
, hash
, INSERT
);
3398 /* Build the TYPENAME_TYPE. */
3399 t
= cxx_make_type (TYPENAME_TYPE
);
3400 TYPE_CONTEXT (t
) = ti
.scope
;
3401 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3402 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3403 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3405 /* Build the corresponding TYPE_DECL. */
3406 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3407 TYPE_NAME (TREE_TYPE (d
)) = d
;
3408 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3409 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3410 DECL_ARTIFICIAL (d
) = 1;
3412 /* Store it in the hash table. */
3415 /* TYPENAME_TYPEs must always be compared structurally, because
3416 they may or may not resolve down to another type depending on
3417 the currently open classes. */
3418 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3424 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3425 provided to name the type. Returns an appropriate type, unless an
3426 error occurs, in which case error_mark_node is returned. If we
3427 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3428 return that, rather than the _TYPE it corresponds to, in other
3429 cases we look through the type decl. If TF_ERROR is set, complain
3430 about errors, otherwise be quiet. */
3433 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3434 tsubst_flags_t complain
)
3440 if (name
== error_mark_node
3441 || context
== NULL_TREE
3442 || context
== error_mark_node
)
3443 return error_mark_node
;
3447 if (!(TYPE_LANG_SPECIFIC (name
)
3448 && (CLASSTYPE_IS_TEMPLATE (name
)
3449 || CLASSTYPE_USE_TEMPLATE (name
))))
3450 name
= TYPE_IDENTIFIER (name
);
3452 /* Create a TEMPLATE_ID_EXPR for the type. */
3453 name
= build_nt (TEMPLATE_ID_EXPR
,
3454 CLASSTYPE_TI_TEMPLATE (name
),
3455 CLASSTYPE_TI_ARGS (name
));
3457 else if (TREE_CODE (name
) == TYPE_DECL
)
3458 name
= DECL_NAME (name
);
3462 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3464 name
= TREE_OPERAND (name
, 0);
3465 if (DECL_TYPE_TEMPLATE_P (name
))
3466 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3467 if (TREE_CODE (name
) != IDENTIFIER_NODE
)
3469 if (complain
& tf_error
)
3470 error ("%qD is not a type", name
);
3471 return error_mark_node
;
3474 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3476 if (complain
& tf_error
)
3477 error ("%qD used without template parameters", name
);
3478 return error_mark_node
;
3480 gcc_assert (identifier_p (name
));
3481 gcc_assert (TYPE_P (context
));
3483 if (!MAYBE_CLASS_TYPE_P (context
))
3485 if (complain
& tf_error
)
3486 error ("%q#T is not a class", context
);
3487 return error_mark_node
;
3490 /* When the CONTEXT is a dependent type, NAME could refer to a
3491 dependent base class of CONTEXT. But look inside it anyway
3492 if CONTEXT is a currently open scope, in case it refers to a
3493 member of the current instantiation or a non-dependent base;
3494 lookup will stop when we hit a dependent base. */
3495 if (!dependent_scope_p (context
))
3496 /* We should only set WANT_TYPE when we're a nested typename type.
3497 Then we can give better diagnostics if we find a non-type. */
3498 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3502 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3503 return build_typename_type (context
, name
, fullname
, tag_type
);
3505 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3509 if (complain
& tf_error
)
3510 error (want_template
? G_("no class template named %q#T in %q#T")
3511 : G_("no type named %q#T in %q#T"), name
, context
);
3512 return error_mark_node
;
3515 /* Pull out the template from an injected-class-name (or multiple). */
3517 t
= maybe_get_template_decl_from_type_decl (t
);
3519 if (TREE_CODE (t
) == TREE_LIST
)
3521 if (complain
& tf_error
)
3523 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3524 print_candidates (t
);
3526 return error_mark_node
;
3529 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3531 if (complain
& tf_error
)
3532 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3534 return error_mark_node
;
3536 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3538 if (complain
& tf_error
)
3539 error ("%<typename %T::%D%> names %q#T, which is not a type",
3541 return error_mark_node
;
3544 if (!perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
, complain
))
3545 return error_mark_node
;
3547 /* If we are currently parsing a template and if T is a typedef accessed
3548 through CONTEXT then we need to remember and check access of T at
3549 template instantiation time. */
3550 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3553 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3555 /*entering_scope=*/0,
3556 complain
| tf_user
);
3558 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3561 maybe_record_typedef_use (t
);
3566 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3567 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3568 in which case error_mark_node is returned.
3570 If PARM_LIST is non-NULL, also make sure that the template parameter
3571 list of TEMPLATE_DECL matches.
3573 If COMPLAIN zero, don't complain about any errors that occur. */
3576 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3577 tsubst_flags_t complain
)
3583 name
= TYPE_IDENTIFIER (name
);
3584 else if (DECL_P (name
))
3585 name
= DECL_NAME (name
);
3586 gcc_assert (identifier_p (name
));
3588 if (!dependent_type_p (context
)
3589 || currently_open_class (context
))
3591 tree tmpl
= NULL_TREE
;
3593 if (MAYBE_CLASS_TYPE_P (context
))
3594 tmpl
= lookup_field (context
, name
, 0, false);
3596 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3597 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3599 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3601 if (complain
& tf_error
)
3602 error ("no class template named %q#T in %q#T", name
, context
);
3603 return error_mark_node
;
3607 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3609 if (complain
& tf_error
)
3611 error ("template parameters do not match template %qD", tmpl
);
3612 inform (DECL_SOURCE_LOCATION (tmpl
),
3613 "%qD declared here", tmpl
);
3615 return error_mark_node
;
3618 if (!perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
,
3620 return error_mark_node
;
3625 /* Build the UNBOUND_CLASS_TEMPLATE. */
3626 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3627 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3628 TREE_TYPE (t
) = NULL_TREE
;
3629 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3631 /* Build the corresponding TEMPLATE_DECL. */
3632 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3633 TYPE_NAME (TREE_TYPE (d
)) = d
;
3634 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3635 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3636 DECL_ARTIFICIAL (d
) = 1;
3637 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3644 /* Push the declarations of builtin types into the namespace.
3645 RID_INDEX is the index of the builtin type in the array
3646 RID_POINTERS. NAME is the name used when looking up the builtin
3647 type. TYPE is the _TYPE node for the builtin type. */
3650 record_builtin_type (enum rid rid_index
,
3654 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3655 tree tdecl
= NULL_TREE
;
3657 if ((int) rid_index
< (int) RID_MAX
)
3658 rname
= ridpointers
[(int) rid_index
];
3660 tname
= get_identifier (name
);
3662 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3663 eliminated. Built-in types should not be looked up name; their
3664 names are keywords that the parser can recognize. However, there
3665 is code in c-common.c that uses identifier_global_value to look
3666 up built-in types by name. */
3669 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3670 DECL_ARTIFICIAL (tdecl
) = 1;
3671 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3677 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3678 DECL_ARTIFICIAL (tdecl
) = 1;
3680 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3683 if (!TYPE_NAME (type
))
3684 TYPE_NAME (type
) = tdecl
;
3687 debug_hooks
->type_decl (tdecl
, 0);
3690 /* Record one of the standard Java types.
3691 * Declare it as having the given NAME.
3692 * If SIZE > 0, it is the size of one of the integral types;
3693 * otherwise it is the negative of the size of one of the other types. */
3696 record_builtin_java_type (const char* name
, int size
)
3701 type
= build_nonstandard_integer_type (size
, 0);
3702 type
= build_distinct_type_copy (type
);
3704 else if (size
> -32)
3707 /* "__java_char" or ""__java_boolean". */
3708 type
= build_nonstandard_integer_type (-size
, 1);
3709 type
= build_distinct_type_copy (type
);
3710 /* Get the signed type cached and attached to the unsigned type,
3711 so it doesn't get garbage-collected at "random" times,
3712 causing potential codegen differences out of different UIDs
3713 and different alias set numbers. */
3714 stype
= build_nonstandard_integer_type (-size
, 0);
3715 stype
= build_distinct_type_copy (stype
);
3716 TREE_CHAIN (type
) = stype
;
3717 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3720 { /* "__java_float" or ""__java_double". */
3721 type
= make_node (REAL_TYPE
);
3722 TYPE_PRECISION (type
) = - size
;
3725 record_builtin_type (RID_MAX
, name
, type
);
3726 decl
= TYPE_NAME (type
);
3728 /* Suppress generate debug symbol entries for these types,
3729 since for normal C++ they are just clutter.
3730 However, push_lang_context undoes this if extern "Java" is seen. */
3731 DECL_IGNORED_P (decl
) = 1;
3733 TYPE_FOR_JAVA (type
) = 1;
3737 /* Push a type into the namespace so that the back ends ignore it. */
3740 record_unknown_type (tree type
, const char* name
)
3742 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3743 TYPE_DECL
, get_identifier (name
), type
));
3744 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3745 DECL_IGNORED_P (decl
) = 1;
3746 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3747 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3748 TYPE_ALIGN (type
) = 1;
3749 TYPE_USER_ALIGN (type
) = 0;
3750 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3753 /* A string for which we should create an IDENTIFIER_NODE at
3756 typedef struct predefined_identifier
3758 /* The name of the identifier. */
3759 const char *const name
;
3760 /* The place where the IDENTIFIER_NODE should be stored. */
3762 /* Nonzero if this is the name of a constructor or destructor. */
3763 const int ctor_or_dtor_p
;
3764 } predefined_identifier
;
3766 /* Create all the predefined identifiers. */
3769 initialize_predefined_identifiers (void)
3771 const predefined_identifier
*pid
;
3773 /* A table of identifiers to create at startup. */
3774 static const predefined_identifier predefined_identifiers
[] = {
3775 { "C++", &lang_name_cplusplus
, 0 },
3776 { "C", &lang_name_c
, 0 },
3777 { "Java", &lang_name_java
, 0 },
3778 /* Some of these names have a trailing space so that it is
3779 impossible for them to conflict with names written by users. */
3780 { "__ct ", &ctor_identifier
, 1 },
3781 { "__base_ctor ", &base_ctor_identifier
, 1 },
3782 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3783 { "__dt ", &dtor_identifier
, 1 },
3784 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3785 { "__base_dtor ", &base_dtor_identifier
, 1 },
3786 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3787 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3788 { "nelts", &nelts_identifier
, 0 },
3789 { THIS_NAME
, &this_identifier
, 0 },
3790 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3791 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3792 { "_vptr", &vptr_identifier
, 0 },
3793 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3794 { "::", &global_scope_name
, 0 },
3795 { "std", &std_identifier
, 0 },
3799 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3801 *pid
->node
= get_identifier (pid
->name
);
3802 if (pid
->ctor_or_dtor_p
)
3803 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3807 /* Create the predefined scalar types of C,
3808 and some nodes representing standard constants (0, 1, (void *)0).
3809 Initialize the global binding level.
3810 Make definitions for built-in primitive functions. */
3813 cxx_init_decl_processing (void)
3816 tree void_ftype_ptr
;
3818 /* Create all the identifiers we need. */
3819 initialize_predefined_identifiers ();
3821 /* Create the global variables. */
3822 push_to_top_level ();
3824 current_function_decl
= NULL_TREE
;
3825 current_binding_level
= NULL
;
3826 /* Enter the global namespace. */
3827 gcc_assert (global_namespace
== NULL_TREE
);
3828 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3830 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3831 debug_hooks
->register_main_translation_unit
3832 (DECL_CONTEXT (global_namespace
));
3833 TREE_PUBLIC (global_namespace
) = 1;
3834 begin_scope (sk_namespace
, global_namespace
);
3836 if (flag_visibility_ms_compat
)
3837 default_visibility
= VISIBILITY_HIDDEN
;
3840 current_lang_name
= lang_name_c
;
3842 /* Create the `std' namespace. */
3843 push_namespace (std_identifier
);
3844 std_node
= current_namespace
;
3847 c_common_nodes_and_builtins ();
3849 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3850 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3851 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3852 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3853 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3854 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3855 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3856 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3858 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3860 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3861 truthvalue_type_node
= boolean_type_node
;
3862 truthvalue_false_node
= boolean_false_node
;
3863 truthvalue_true_node
= boolean_true_node
;
3865 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3866 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3867 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3870 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3873 delta_type_node
= ptrdiff_type_node
;
3874 vtable_index_type
= ptrdiff_type_node
;
3876 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3877 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3878 void_ftype_ptr
= build_function_type_list (void_type_node
,
3879 ptr_type_node
, NULL_TREE
);
3881 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3883 /* C++ extensions */
3885 unknown_type_node
= make_node (LANG_TYPE
);
3886 record_unknown_type (unknown_type_node
, "unknown type");
3888 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3889 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3891 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3893 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3894 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3896 init_list_type_node
= make_node (LANG_TYPE
);
3897 record_unknown_type (init_list_type_node
, "init list");
3900 /* Make sure we get a unique function type, so we can give
3901 its pointer type a name. (This wins for gdb.) */
3902 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3903 TREE_TYPE (vfunc_type
) = integer_type_node
;
3904 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3905 layout_type (vfunc_type
);
3907 vtable_entry_type
= build_pointer_type (vfunc_type
);
3909 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3912 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3913 layout_type (vtbl_type_node
);
3914 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3915 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3916 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3917 layout_type (vtbl_ptr_type_node
);
3918 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3920 push_namespace (get_identifier ("__cxxabiv1"));
3921 abi_node
= current_namespace
;
3924 global_type_node
= make_node (LANG_TYPE
);
3925 record_unknown_type (global_type_node
, "global type");
3928 current_lang_name
= lang_name_cplusplus
;
3931 tree newattrs
, extvisattr
;
3932 tree newtype
, deltype
;
3933 tree ptr_ftype_sizetype
;
3937 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3938 if (cxx_dialect
== cxx98
)
3941 tree bad_alloc_type_node
;
3942 tree bad_alloc_decl
;
3944 push_namespace (std_identifier
);
3945 bad_alloc_id
= get_identifier ("bad_alloc");
3946 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3947 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3949 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3950 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3954 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3957 new_eh_spec
= noexcept_false_spec
;
3959 /* Ensure attribs.c is initialized. */
3961 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3963 newattrs
= tree_cons (get_identifier ("alloc_size"),
3964 build_tree_list (NULL_TREE
, integer_one_node
),
3966 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3967 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3968 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3969 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3970 tree opnew
= push_cp_library_fn (NEW_EXPR
, newtype
, 0);
3971 DECL_IS_MALLOC (opnew
) = 1;
3972 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3973 opnew
= push_cp_library_fn (VEC_NEW_EXPR
, newtype
, 0);
3974 DECL_IS_MALLOC (opnew
) = 1;
3975 DECL_IS_OPERATOR_NEW (opnew
) = 1;
3976 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3977 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3978 if (flag_sized_deallocation
)
3980 /* Also push the sized deallocation variants:
3981 void operator delete(void*, std::size_t) throw();
3982 void operator delete[](void*, std::size_t) throw(); */
3983 tree void_ftype_ptr_size
3984 = build_function_type_list (void_type_node
, ptr_type_node
,
3985 size_type_node
, NULL_TREE
);
3986 deltype
= cp_build_type_attribute_variant (void_ftype_ptr_size
,
3988 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3989 push_cp_library_fn (DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3990 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
, ECF_NOTHROW
);
3993 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3994 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3995 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3996 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3997 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3998 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3999 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
4000 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
4004 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
,
4005 ECF_NORETURN
| ECF_NOTHROW
);
4007 /* Perform other language dependent initializations. */
4008 init_class_processing ();
4009 init_rtti_processing ();
4010 init_template_processing ();
4012 if (flag_exceptions
)
4013 init_exception_processing ();
4015 if (! supports_one_only ())
4018 make_fname_decl
= cp_make_fname_decl
;
4019 start_fname_decls ();
4021 /* Show we use EH for cleanups. */
4022 if (flag_exceptions
)
4023 using_eh_for_cleanups ();
4026 /* Generate an initializer for a function naming variable from
4027 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
4028 filled in with the type of the init. */
4031 cp_fname_init (const char* name
, tree
*type_p
)
4033 tree domain
= NULL_TREE
;
4035 tree init
= NULL_TREE
;
4040 length
= strlen (name
);
4041 domain
= build_index_type (size_int (length
));
4042 init
= build_string (length
+ 1, name
);
4045 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
4046 type
= build_cplus_array_type (type
, domain
);
4051 TREE_TYPE (init
) = type
;
4053 init
= error_mark_node
;
4058 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
4059 the decl, LOC is the location to give the decl, NAME is the
4060 initialization string and TYPE_DEP indicates whether NAME depended
4061 on the type of the function. We make use of that to detect
4062 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
4063 at the point of first use, so we mustn't push the decl now. */
4066 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
4068 const char *const name
= (type_dep
&& processing_template_decl
4069 ? NULL
: fname_as_string (type_dep
));
4071 tree init
= cp_fname_init (name
, &type
);
4072 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
4075 free (CONST_CAST (char *, name
));
4077 /* As we're using pushdecl_with_scope, we must set the context. */
4078 DECL_CONTEXT (decl
) = current_function_decl
;
4080 TREE_STATIC (decl
) = 1;
4081 TREE_READONLY (decl
) = 1;
4082 DECL_ARTIFICIAL (decl
) = 1;
4084 TREE_USED (decl
) = 1;
4086 if (current_function_decl
)
4088 cp_binding_level
*b
= current_binding_level
;
4089 if (b
->kind
== sk_function_parms
)
4090 return error_mark_node
;
4091 while (b
->level_chain
->kind
!= sk_function_parms
)
4093 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
4094 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
4095 LOOKUP_ONLYCONVERTING
);
4099 DECL_THIS_STATIC (decl
) = true;
4100 pushdecl_top_level_and_finish (decl
, init
);
4107 builtin_function_1 (tree decl
, tree context
, bool is_global
)
4109 tree id
= DECL_NAME (decl
);
4110 const char *name
= IDENTIFIER_POINTER (id
);
4112 retrofit_lang_decl (decl
);
4114 DECL_ARTIFICIAL (decl
) = 1;
4115 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
4116 SET_DECL_LANGUAGE (decl
, lang_c
);
4117 /* Runtime library routines are, by definition, available in an
4118 external shared object. */
4119 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
4120 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
4122 DECL_CONTEXT (decl
) = context
;
4125 pushdecl_top_level (decl
);
4129 /* A function in the user's namespace should have an explicit
4130 declaration before it is used. Mark the built-in function as
4131 anticipated but not actually declared. */
4132 if (name
[0] != '_' || name
[1] != '_')
4133 DECL_ANTICIPATED (decl
) = 1;
4134 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
4136 size_t len
= strlen (name
);
4138 /* Treat __*_chk fortification functions as anticipated as well,
4139 unless they are __builtin_*. */
4140 if (len
> strlen ("___chk")
4141 && memcmp (name
+ len
- strlen ("_chk"),
4142 "_chk", strlen ("_chk") + 1) == 0)
4143 DECL_ANTICIPATED (decl
) = 1;
4150 cxx_builtin_function (tree decl
)
4152 tree id
= DECL_NAME (decl
);
4153 const char *name
= IDENTIFIER_POINTER (id
);
4154 /* All builtins that don't begin with an '_' should additionally
4155 go in the 'std' namespace. */
4158 tree decl2
= copy_node(decl
);
4159 push_namespace (std_identifier
);
4160 builtin_function_1 (decl2
, std_node
, false);
4164 return builtin_function_1 (decl
, NULL_TREE
, false);
4167 /* Like cxx_builtin_function, but guarantee the function is added to the global
4168 scope. This is to allow function specific options to add new machine
4169 dependent builtins when the target ISA changes via attribute((target(...)))
4170 which saves space on program startup if the program does not use non-generic
4174 cxx_builtin_function_ext_scope (tree decl
)
4177 tree id
= DECL_NAME (decl
);
4178 const char *name
= IDENTIFIER_POINTER (id
);
4179 /* All builtins that don't begin with an '_' should additionally
4180 go in the 'std' namespace. */
4183 tree decl2
= copy_node(decl
);
4184 push_namespace (std_identifier
);
4185 builtin_function_1 (decl2
, std_node
, true);
4189 return builtin_function_1 (decl
, NULL_TREE
, true);
4192 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
4193 function. Not called directly. */
4196 build_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4199 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
4200 DECL_EXTERNAL (fn
) = 1;
4201 TREE_PUBLIC (fn
) = 1;
4202 DECL_ARTIFICIAL (fn
) = 1;
4203 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
4204 SET_DECL_LANGUAGE (fn
, lang_c
);
4205 /* Runtime library routines are, by definition, available in an
4206 external shared object. */
4207 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
4208 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
4209 set_call_expr_flags (fn
, ecf_flags
);
4213 /* Returns the _DECL for a library function with C++ linkage. */
4216 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
,
4219 tree fn
= build_library_fn (name
, operator_code
, type
, ecf_flags
);
4220 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
4221 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
4225 /* Like build_library_fn, but takes a C string instead of an
4229 build_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4231 return build_library_fn (get_identifier (name
), ERROR_MARK
, type
, ecf_flags
);
4234 /* Like build_cp_library_fn, but takes a C string instead of an
4238 build_cp_library_fn_ptr (const char* name
, tree type
, int ecf_flags
)
4240 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
,
4244 /* Like build_library_fn, but also pushes the function so that we will
4245 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
4246 may throw exceptions listed in RAISES. */
4249 push_library_fn (tree name
, tree type
, tree raises
, int ecf_flags
)
4254 type
= build_exception_variant (type
, raises
);
4256 fn
= build_library_fn (name
, ERROR_MARK
, type
, ecf_flags
);
4257 pushdecl_top_level (fn
);
4261 /* Like build_cp_library_fn, but also pushes the function so that it
4262 will be found by normal lookup. */
4265 push_cp_library_fn (enum tree_code operator_code
, tree type
,
4268 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4273 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4277 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4281 push_void_library_fn (tree name
, tree parmtypes
, int ecf_flags
)
4283 tree type
= build_function_type (void_type_node
, parmtypes
);
4284 return push_library_fn (name
, type
, NULL_TREE
, ecf_flags
);
4287 /* Like push_library_fn, but also note that this function throws
4288 and does not return. Used for __throw_foo and the like. */
4291 push_throw_library_fn (tree name
, tree type
)
4293 tree fn
= push_library_fn (name
, type
, NULL_TREE
, ECF_NORETURN
);
4297 /* When we call finish_struct for an anonymous union, we create
4298 default copy constructors and such. But, an anonymous union
4299 shouldn't have such things; this function undoes the damage to the
4300 anonymous union type T.
4302 (The reason that we create the synthesized methods is that we don't
4303 distinguish `union { int i; }' from `typedef union { int i; } U'.
4304 The first is an anonymous union; the second is just an ordinary
4308 fixup_anonymous_aggr (tree t
)
4312 /* Wipe out memory of synthesized methods. */
4313 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4314 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4315 TYPE_HAS_COPY_CTOR (t
) = 0;
4316 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4317 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4318 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4320 /* Splice the implicitly generated functions out of the TYPE_METHODS
4322 q
= &TYPE_METHODS (t
);
4325 if (DECL_ARTIFICIAL (*q
))
4326 *q
= TREE_CHAIN (*q
);
4328 q
= &DECL_CHAIN (*q
);
4331 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4332 if (TYPE_METHODS (t
))
4334 tree decl
= TYPE_MAIN_DECL (t
);
4336 if (TREE_CODE (t
) != UNION_TYPE
)
4337 error_at (DECL_SOURCE_LOCATION (decl
),
4338 "an anonymous struct cannot have function members");
4340 error_at (DECL_SOURCE_LOCATION (decl
),
4341 "an anonymous union cannot have function members");
4344 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4345 assignment operators (because they cannot have these methods themselves).
4346 For anonymous unions this is already checked because they are not allowed
4347 in any union, otherwise we have to check it. */
4348 if (TREE_CODE (t
) != UNION_TYPE
)
4352 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4353 if (TREE_CODE (field
) == FIELD_DECL
)
4355 type
= TREE_TYPE (field
);
4356 if (CLASS_TYPE_P (type
))
4358 if (TYPE_NEEDS_CONSTRUCTING (type
))
4359 error ("member %q+#D with constructor not allowed "
4360 "in anonymous aggregate", field
);
4361 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4362 error ("member %q+#D with destructor not allowed "
4363 "in anonymous aggregate", field
);
4364 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4365 error ("member %q+#D with copy assignment operator "
4366 "not allowed in anonymous aggregate", field
);
4372 /* Warn for an attribute located at LOCATION that appertains to the
4373 class type CLASS_TYPE that has not been properly placed after its
4374 class-key, in it class-specifier. */
4377 warn_misplaced_attr_for_class_type (source_location location
,
4380 gcc_assert (OVERLOAD_TYPE_P (class_type
));
4382 if (warning_at (location
, OPT_Wattributes
,
4383 "attribute ignored in declaration "
4384 "of %q#T", class_type
))
4386 "attribute for %q#T must follow the %qs keyword",
4387 class_type
, class_key_or_enum_as_string (class_type
));
4390 /* Make sure that a declaration with no declarator is well-formed, i.e.
4391 just declares a tagged type or anonymous union.
4393 Returns the type declared; or NULL_TREE if none. */
4396 check_tag_decl (cp_decl_specifier_seq
*declspecs
,
4397 bool explicit_type_instantiation_p
)
4399 int saw_friend
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
4400 int saw_typedef
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
4401 /* If a class, struct, or enum type is declared by the DECLSPECS
4402 (i.e, if a class-specifier, enum-specifier, or non-typename
4403 elaborated-type-specifier appears in the DECLSPECS),
4404 DECLARED_TYPE is set to the corresponding type. */
4405 tree declared_type
= NULL_TREE
;
4406 bool error_p
= false;
4408 if (declspecs
->multiple_types_p
)
4409 error ("multiple types in one declaration");
4410 else if (declspecs
->redefined_builtin_type
)
4412 if (!in_system_header_at (input_location
))
4413 permerror (declspecs
->locations
[ds_redefined_builtin_type_spec
],
4414 "redeclaration of C++ built-in type %qT",
4415 declspecs
->redefined_builtin_type
);
4420 && TYPE_P (declspecs
->type
)
4421 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4422 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4423 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4424 declared_type
= declspecs
->type
;
4425 else if (declspecs
->type
== error_mark_node
)
4427 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4428 permerror (input_location
, "declaration does not declare anything");
4429 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4431 error ("%<auto%> can only be specified for variables "
4432 "or function declarations");
4433 return error_mark_node
;
4435 /* Check for an anonymous union. */
4436 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4437 && TYPE_ANONYMOUS_P (declared_type
))
4439 /* 7/3 In a simple-declaration, the optional init-declarator-list
4440 can be omitted only when declaring a class (clause 9) or
4441 enumeration (7.2), that is, when the decl-specifier-seq contains
4442 either a class-specifier, an elaborated-type-specifier with
4443 a class-key (9.1), or an enum-specifier. In these cases and
4444 whenever a class-specifier or enum-specifier is present in the
4445 decl-specifier-seq, the identifiers in these specifiers are among
4446 the names being declared by the declaration (as class-name,
4447 enum-names, or enumerators, depending on the syntax). In such
4448 cases, and except for the declaration of an unnamed bit-field (9.6),
4449 the decl-specifier-seq shall introduce one or more names into the
4450 program, or shall redeclare a name introduced by a previous
4451 declaration. [Example:
4452 enum { }; // ill-formed
4453 typedef class { }; // ill-formed
4457 error ("missing type-name in typedef-declaration");
4460 /* Anonymous unions are objects, so they can have specifiers. */;
4461 SET_ANON_AGGR_TYPE_P (declared_type
);
4463 if (TREE_CODE (declared_type
) != UNION_TYPE
4464 && !in_system_header_at (input_location
))
4465 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ prohibits anonymous structs");
4470 if (decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
4471 error_at (declspecs
->locations
[ds_inline
],
4472 "%<inline%> can only be specified for functions");
4473 else if (decl_spec_seq_has_spec_p (declspecs
, ds_virtual
))
4474 error_at (declspecs
->locations
[ds_virtual
],
4475 "%<virtual%> can only be specified for functions");
4477 && (!current_class_type
4478 || current_scope () != current_class_type
))
4479 error_at (declspecs
->locations
[ds_friend
],
4480 "%<friend%> can only be specified inside a class");
4481 else if (decl_spec_seq_has_spec_p (declspecs
, ds_explicit
))
4482 error_at (declspecs
->locations
[ds_explicit
],
4483 "%<explicit%> can only be specified for constructors");
4484 else if (declspecs
->storage_class
)
4485 error_at (declspecs
->locations
[ds_storage_class
],
4486 "a storage class can only be specified for objects "
4488 else if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
4489 error_at (declspecs
->locations
[ds_const
],
4490 "%<const%> can only be specified for objects and "
4492 else if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
4493 error_at (declspecs
->locations
[ds_volatile
],
4494 "%<volatile%> can only be specified for objects and "
4496 else if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
4497 error_at (declspecs
->locations
[ds_restrict
],
4498 "%<__restrict%> can only be specified for objects and "
4500 else if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
4501 error_at (declspecs
->locations
[ds_thread
],
4502 "%<__thread%> can only be specified for objects "
4504 else if (saw_typedef
)
4505 warning_at (declspecs
->locations
[ds_typedef
], 0,
4506 "%<typedef%> was ignored in this declaration");
4507 else if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
))
4508 error_at (declspecs
->locations
[ds_constexpr
],
4509 "%<constexpr%> cannot be used for type declarations");
4512 if (declspecs
->attributes
&& warn_attributes
&& declared_type
)
4515 if (!CLASS_TYPE_P (declared_type
)
4516 || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4517 /* For a non-template class, use the name location. */
4518 loc
= location_of (declared_type
);
4520 /* For a template class (an explicit instantiation), use the
4521 current location. */
4522 loc
= input_location
;
4524 if (explicit_type_instantiation_p
)
4525 /* [dcl.attr.grammar]/4:
4527 No attribute-specifier-seq shall appertain to an explicit
4530 if (warning_at (loc
, OPT_Wattributes
,
4531 "attribute ignored in explicit instantiation %q#T",
4534 "no attribute can be applied to "
4535 "an explicit instantiation");
4538 warn_misplaced_attr_for_class_type (loc
, declared_type
);
4541 return declared_type
;
4544 /* Called when a declaration is seen that contains no names to declare.
4545 If its type is a reference to a structure, union or enum inherited
4546 from a containing scope, shadow that tag name for the current scope
4547 with a forward reference.
4548 If its type defines a new named structure or union
4549 or defines an enum, it is valid but we need not do anything here.
4550 Otherwise, it is an error.
4552 C++: may have to grok the declspecs to learn about static,
4553 complain for anonymous unions.
4555 Returns the TYPE declared -- or NULL_TREE if none. */
4558 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4560 tree t
= check_tag_decl (declspecs
,
4561 /*explicit_type_instantiation_p=*/false);
4566 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4569 /* This is where the variables in an anonymous union are
4570 declared. An anonymous union declaration looks like:
4572 because there is no declarator after the union, the parser
4573 sends that declaration here. */
4574 if (ANON_AGGR_TYPE_P (t
))
4576 fixup_anonymous_aggr (t
);
4578 if (TYPE_FIELDS (t
))
4580 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4581 declspecs
, NORMAL
, 0, NULL
);
4582 finish_anon_union (decl
);
4589 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4592 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4593 const cp_declarator
*declarator
,
4594 bool is_template_arg
)
4598 enum decl_context context
4599 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4600 attrs
= type_specifiers
->attributes
;
4601 type_specifiers
->attributes
= NULL_TREE
;
4602 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4603 if (attrs
&& type
!= error_mark_node
)
4605 if (CLASS_TYPE_P (type
))
4606 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4607 "outside of definition", type
);
4608 else if (MAYBE_CLASS_TYPE_P (type
))
4609 /* A template type parameter or other dependent type. */
4610 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4611 "type %qT without an associated declaration", type
);
4613 cplus_decl_attributes (&type
, attrs
, 0);
4618 /* Process a DECLARATOR for a function-scope variable declaration,
4619 namespace-scope variable declaration, or function declaration.
4620 (Function definitions go through start_function; class member
4621 declarations appearing in the body of the class go through
4622 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4623 If an error occurs, the error_mark_node is returned instead.
4625 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4626 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4627 for an explicitly defaulted function, or SD_DELETED for an explicitly
4628 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4629 implicitly initialized via a default constructor. ATTRIBUTES and
4630 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4632 The scope represented by the context of the returned DECL is pushed
4633 (if it is not the global namespace) and is assigned to
4634 *PUSHED_SCOPE_P. The caller is then responsible for calling
4635 pop_scope on *PUSHED_SCOPE_P if it is set. */
4638 start_decl (const cp_declarator
*declarator
,
4639 cp_decl_specifier_seq
*declspecs
,
4642 tree prefix_attributes
,
4643 tree
*pushed_scope_p
)
4651 *pushed_scope_p
= NULL_TREE
;
4653 /* An object declared as __attribute__((deprecated)) suppresses
4654 warnings of uses of other deprecated items. */
4655 if (lookup_attribute ("deprecated", attributes
))
4656 deprecated_state
= DEPRECATED_SUPPRESS
;
4658 attributes
= chainon (attributes
, prefix_attributes
);
4660 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4663 deprecated_state
= DEPRECATED_NORMAL
;
4665 if (decl
== NULL_TREE
|| VOID_TYPE_P (decl
)
4666 || decl
== error_mark_node
)
4667 return error_mark_node
;
4669 context
= CP_DECL_CONTEXT (decl
);
4670 if (context
!= global_namespace
)
4671 *pushed_scope_p
= push_scope (context
);
4673 /* Is it valid for this decl to have an initializer at all?
4674 If not, set INITIALIZED to zero, which will indirectly
4675 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4677 && TREE_CODE (decl
) == TYPE_DECL
)
4679 error ("typedef %qD is initialized (use decltype instead)", decl
);
4680 return error_mark_node
;
4685 if (! toplevel_bindings_p ()
4686 && DECL_EXTERNAL (decl
))
4687 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4689 DECL_EXTERNAL (decl
) = 0;
4690 if (toplevel_bindings_p ())
4691 TREE_STATIC (decl
) = 1;
4693 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4695 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4696 record_key_method_defined (decl
);
4698 /* If this is a typedef that names the class for linkage purposes
4699 (7.1.3p8), apply any attributes directly to the type. */
4700 if (TREE_CODE (decl
) == TYPE_DECL
4701 && OVERLOAD_TYPE_P (TREE_TYPE (decl
))
4702 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4703 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4707 /* Set attributes here so if duplicate decl, will have proper attributes. */
4708 cplus_decl_attributes (&decl
, attributes
, flags
);
4710 /* Dllimported symbols cannot be defined. Static data members (which
4711 can be initialized in-class and dllimported) go through grokfield,
4712 not here, so we don't need to exclude those decls when checking for
4714 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4716 error ("definition of %q#D is marked %<dllimport%>", decl
);
4717 DECL_DLLIMPORT_P (decl
) = 0;
4720 /* If #pragma weak was used, mark the decl weak now. */
4721 if (!processing_template_decl
)
4722 maybe_apply_pragma_weak (decl
);
4724 if (TREE_CODE (decl
) == FUNCTION_DECL
4725 && DECL_DECLARED_INLINE_P (decl
)
4726 && DECL_UNINLINABLE (decl
)
4727 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4728 warning (0, "inline function %q+D given attribute noinline", decl
);
4730 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4732 bool this_tmpl
= (processing_template_decl
4733 > template_class_depth (context
));
4736 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4737 if (field
== NULL_TREE
4738 || !(VAR_P (field
) || variable_template_p (field
)))
4739 error ("%q+#D is not a static data member of %q#T", decl
, context
);
4740 else if (variable_template_p (field
) && !this_tmpl
)
4742 if (DECL_LANG_SPECIFIC (decl
)
4743 && DECL_TEMPLATE_SPECIALIZATION (decl
))
4744 /* OK, specialization was already checked. */;
4747 error_at (DECL_SOURCE_LOCATION (decl
),
4748 "non-member-template declaration of %qD", decl
);
4749 inform (DECL_SOURCE_LOCATION (field
), "does not match "
4750 "member template declaration here");
4751 return error_mark_node
;
4756 if (variable_template_p (field
))
4757 field
= DECL_TEMPLATE_RESULT (field
);
4759 if (DECL_CONTEXT (field
) != context
)
4761 if (!same_type_p (DECL_CONTEXT (field
), context
))
4762 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4763 "to be defined as %<%T::%D%>",
4764 DECL_CONTEXT (field
), DECL_NAME (decl
),
4765 context
, DECL_NAME (decl
));
4766 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4768 /* Static data member are tricky; an in-class initialization
4769 still doesn't provide a definition, so the in-class
4770 declaration will have DECL_EXTERNAL set, but will have an
4771 initialization. Thus, duplicate_decls won't warn
4772 about this situation, and so we check here. */
4773 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4774 error ("duplicate initialization of %qD", decl
);
4775 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4777 if (decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
)
4778 && !DECL_DECLARED_CONSTEXPR_P (field
))
4779 error ("%qD declared %<constexpr%> outside its class", field
);
4784 tree field
= check_classfn (context
, decl
,
4786 ? current_template_parms
4788 if (field
&& field
!= error_mark_node
4789 && duplicate_decls (decl
, field
,
4790 /*newdecl_is_friend=*/false))
4794 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4795 DECL_IN_AGGR_P (decl
) = 0;
4796 /* Do not mark DECL as an explicit specialization if it was not
4797 already marked as an instantiation; a declaration should
4798 never be marked as a specialization unless we know what
4799 template is being specialized. */
4800 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4802 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4803 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4804 DECL_COMDAT (decl
) = (TREE_PUBLIC (decl
)
4805 && DECL_DECLARED_INLINE_P (decl
));
4807 DECL_COMDAT (decl
) = false;
4809 /* [temp.expl.spec] An explicit specialization of a static data
4810 member of a template is a definition if the declaration
4811 includes an initializer; otherwise, it is a declaration.
4813 We check for processing_specialization so this only applies
4814 to the new specialization syntax. */
4815 if (!initialized
&& processing_specialization
)
4816 DECL_EXTERNAL (decl
) = 1;
4819 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4820 /* Aliases are definitions. */
4822 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4826 was_public
= TREE_PUBLIC (decl
);
4828 /* Enter this declaration into the symbol table. Don't push the plain
4829 VAR_DECL for a variable template. */
4830 if (!template_parm_scope_p ()
4831 || TREE_CODE (decl
) != VAR_DECL
)
4832 decl
= maybe_push_decl (decl
);
4834 if (processing_template_decl
)
4835 decl
= push_template_decl (decl
);
4836 if (decl
== error_mark_node
)
4837 return error_mark_node
;
4840 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4841 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4843 /* This is a const variable with implicit 'static'. Set
4844 DECL_THIS_STATIC so we can tell it from variables that are
4845 !TREE_PUBLIC because of the anonymous namespace. */
4846 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4847 DECL_THIS_STATIC (decl
) = 1;
4850 if (current_function_decl
&& VAR_P (decl
)
4851 && DECL_DECLARED_CONSTEXPR_P (current_function_decl
))
4854 if (DECL_THREAD_LOCAL_P (decl
))
4855 error ("%qD declared %<thread_local%> in %<constexpr%> function",
4857 else if (TREE_STATIC (decl
))
4858 error ("%qD declared %<static%> in %<constexpr%> function", decl
);
4862 cp_function_chain
->invalid_constexpr
= true;
4865 if (!processing_template_decl
&& VAR_P (decl
))
4866 start_decl_1 (decl
, initialized
);
4871 /* Process the declaration of a variable DECL. INITIALIZED is true
4872 iff DECL is explicitly initialized. (INITIALIZED is false if the
4873 variable is initialized via an implicitly-called constructor.)
4874 This function must be called for ordinary variables (including, for
4875 example, implicit instantiations of templates), but must not be
4876 called for template declarations. */
4879 start_decl_1 (tree decl
, bool initialized
)
4883 bool aggregate_definition_p
;
4885 gcc_assert (!processing_template_decl
);
4887 if (error_operand_p (decl
))
4890 gcc_assert (VAR_P (decl
));
4892 type
= TREE_TYPE (decl
);
4893 complete_p
= COMPLETE_TYPE_P (type
);
4894 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4896 /* If an explicit initializer is present, or if this is a definition
4897 of an aggregate, then we need a complete type at this point.
4898 (Scalars are always complete types, so there is nothing to
4899 check.) This code just sets COMPLETE_P; errors (if necessary)
4900 are issued below. */
4901 if ((initialized
|| aggregate_definition_p
)
4903 && COMPLETE_TYPE_P (complete_type (type
)))
4906 /* We will not yet have set TREE_READONLY on DECL if the type
4907 was "const", but incomplete, before this point. But, now, we
4908 have a complete type, so we can try again. */
4909 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4913 /* Is it valid for this decl to have an initializer at all? */
4915 /* Don't allow initializations for incomplete types except for
4916 arrays which might be completed by the initialization. */
4918 ; /* A complete type is ok. */
4919 else if (type_uses_auto (type
))
4920 ; /* An auto type is ok. */
4921 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4923 error ("variable %q#D has initializer but incomplete type", decl
);
4924 type
= TREE_TYPE (decl
) = error_mark_node
;
4926 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4928 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4929 error ("elements of array %q#D have incomplete type", decl
);
4930 /* else we already gave an error in start_decl. */
4933 else if (aggregate_definition_p
&& !complete_p
)
4935 if (type_uses_auto (type
))
4936 error ("declaration of %q#D has no initializer", decl
);
4938 error ("aggregate %q#D has incomplete type and cannot be defined",
4940 /* Change the type so that assemble_variable will give
4941 DECL an rtl we can live with: (mem (const_int 0)). */
4942 type
= TREE_TYPE (decl
) = error_mark_node
;
4945 /* Create a new scope to hold this declaration if necessary.
4946 Whether or not a new scope is necessary cannot be determined
4947 until after the type has been completed; if the type is a
4948 specialization of a class template it is not until after
4949 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4950 will be set correctly. */
4951 maybe_push_cleanup_level (type
);
4954 /* Handle initialization of references. DECL, TYPE, and INIT have the
4955 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4956 but will be set to a new CLEANUP_STMT if a temporary is created
4957 that must be destroyed subsequently.
4959 Returns an initializer expression to use to initialize DECL, or
4960 NULL if the initialization can be performed statically.
4962 Quotes on semantics can be found in ARM 8.4.3. */
4965 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4967 if (init
== NULL_TREE
)
4969 if ((DECL_LANG_SPECIFIC (decl
) == 0
4970 || DECL_IN_AGGR_P (decl
) == 0)
4971 && ! DECL_THIS_EXTERN (decl
))
4972 error ("%qD declared as reference but not initialized", decl
);
4976 if (TREE_CODE (init
) == TREE_LIST
)
4977 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4978 tf_warning_or_error
);
4980 tree ttype
= TREE_TYPE (type
);
4981 if (TREE_CODE (ttype
) != ARRAY_TYPE
4982 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4983 /* Note: default conversion is only called in very special cases. */
4984 init
= decay_conversion (init
, tf_warning_or_error
);
4986 /* check_initializer handles this for non-reference variables, but for
4987 references we need to do it here or the initializer will get the
4988 incomplete array type and confuse later calls to
4989 cp_complete_array_type. */
4990 if (TREE_CODE (ttype
) == ARRAY_TYPE
4991 && TYPE_DOMAIN (ttype
) == NULL_TREE
4992 && (BRACE_ENCLOSED_INITIALIZER_P (init
)
4993 || TREE_CODE (init
) == STRING_CST
))
4995 cp_complete_array_type (&ttype
, init
, false);
4996 if (ttype
!= TREE_TYPE (type
))
4997 type
= cp_build_reference_type (ttype
, TYPE_REF_IS_RVALUE (type
));
5000 /* Convert INIT to the reference type TYPE. This may involve the
5001 creation of a temporary, whose lifetime must be the same as that
5002 of the reference. If so, a DECL_EXPR for the temporary will be
5003 added just after the DECL_EXPR for DECL. That's why we don't set
5004 DECL_INITIAL for local references (instead assigning to them
5005 explicitly); we need to allow the temporary to be initialized
5007 return initialize_reference (type
, init
, flags
,
5008 tf_warning_or_error
);
5011 /* Designated initializers in arrays are not supported in GNU C++.
5012 The parser cannot detect this error since it does not know whether
5013 a given brace-enclosed initializer is for a class type or for an
5014 array. This function checks that CE does not use a designated
5015 initializer. If it does, an error is issued. Returns true if CE
5016 is valid, i.e., does not have a designated initializer. */
5019 check_array_designated_initializer (constructor_elt
*ce
,
5020 unsigned HOST_WIDE_INT index
)
5022 /* Designated initializers for array elements are not supported. */
5025 /* The parser only allows identifiers as designated
5027 if (ce
->index
== error_mark_node
)
5029 error ("name used in a GNU-style designated "
5030 "initializer for an array");
5033 else if (identifier_p (ce
->index
))
5035 error ("name %qD used in a GNU-style designated "
5036 "initializer for an array", ce
->index
);
5040 tree ce_index
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
5043 && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index
))
5044 && (TREE_CODE (ce_index
= maybe_constant_value (ce_index
))
5047 /* A C99 designator is OK if it matches the current index. */
5048 if (wi::eq_p (ce_index
, index
))
5051 sorry ("non-trivial designated initializers not supported");
5054 error ("C99 designator %qE is not an integral constant-expression",
5063 /* When parsing `int a[] = {1, 2};' we don't know the size of the
5064 array until we finish parsing the initializer. If that's the
5065 situation we're in, update DECL accordingly. */
5068 maybe_deduce_size_from_array_init (tree decl
, tree init
)
5070 tree type
= TREE_TYPE (decl
);
5072 if (TREE_CODE (type
) == ARRAY_TYPE
5073 && TYPE_DOMAIN (type
) == NULL_TREE
5074 && TREE_CODE (decl
) != TYPE_DECL
)
5076 /* do_default is really a C-ism to deal with tentative definitions.
5077 But let's leave it here to ease the eventual merge. */
5078 int do_default
= !DECL_EXTERNAL (decl
);
5079 tree initializer
= init
? init
: DECL_INITIAL (decl
);
5082 /* Check that there are no designated initializers in INIT, as
5083 those are not supported in GNU C++, and as the middle-end
5084 will crash if presented with a non-numeric designated
5086 if (initializer
&& BRACE_ENCLOSED_INITIALIZER_P (initializer
))
5088 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initializer
);
5089 constructor_elt
*ce
;
5091 FOR_EACH_VEC_SAFE_ELT (v
, i
, ce
)
5092 if (!check_array_designated_initializer (ce
, i
))
5098 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
5102 error ("initializer fails to determine size of %qD", decl
);
5104 else if (failure
== 2)
5108 error ("array size missing in %qD", decl
);
5110 /* If a `static' var's size isn't known, make it extern as
5111 well as static, so it does not get allocated. If it's not
5112 `static', then don't mark it extern; finish_incomplete_decl
5113 will give it a default size and it will get allocated. */
5114 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
5115 DECL_EXTERNAL (decl
) = 1;
5117 else if (failure
== 3)
5119 error ("zero-size array %qD", decl
);
5123 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
5125 relayout_decl (decl
);
5129 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
5130 any appropriate error messages regarding the layout. */
5133 layout_var_decl (tree decl
)
5137 type
= TREE_TYPE (decl
);
5138 if (type
== error_mark_node
)
5141 /* If we haven't already laid out this declaration, do so now.
5142 Note that we must not call complete type for an external object
5143 because it's type might involve templates that we are not
5144 supposed to instantiate yet. (And it's perfectly valid to say
5145 `extern X x' for some incomplete type `X'.) */
5146 if (!DECL_EXTERNAL (decl
))
5147 complete_type (type
);
5148 if (!DECL_SIZE (decl
)
5149 && TREE_TYPE (decl
) != error_mark_node
5150 && (COMPLETE_TYPE_P (type
)
5151 || (TREE_CODE (type
) == ARRAY_TYPE
5152 && !TYPE_DOMAIN (type
)
5153 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
5154 layout_decl (decl
, 0);
5156 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
5158 /* An automatic variable with an incomplete type: that is an error.
5159 Don't talk about array types here, since we took care of that
5160 message in grokdeclarator. */
5161 error ("storage size of %qD isn%'t known", decl
);
5162 TREE_TYPE (decl
) = error_mark_node
;
5165 /* Keep this code around in case we later want to control debug info
5166 based on whether a type is "used". (jason 1999-11-11) */
5168 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
5169 /* Let debugger know it should output info for this type. */
5170 note_debug_info_needed (ttype
);
5172 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
5173 note_debug_info_needed (DECL_CONTEXT (decl
));
5176 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
5177 && DECL_SIZE (decl
) != NULL_TREE
5178 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
5180 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
5181 constant_expression_warning (DECL_SIZE (decl
));
5184 error ("storage size of %qD isn%'t constant", decl
);
5185 TREE_TYPE (decl
) = error_mark_node
;
5190 /* If a local static variable is declared in an inline function, or if
5191 we have a weak definition, we must endeavor to create only one
5192 instance of the variable at link-time. */
5195 maybe_commonize_var (tree decl
)
5197 /* Static data in a function with comdat linkage also has comdat
5199 if (TREE_STATIC (decl
)
5200 /* Don't mess with __FUNCTION__. */
5201 && ! DECL_ARTIFICIAL (decl
)
5202 && DECL_FUNCTION_SCOPE_P (decl
)
5203 && vague_linkage_p (DECL_CONTEXT (decl
)))
5207 /* With weak symbols, we simply make the variable COMDAT;
5208 that will cause copies in multiple translations units to
5210 comdat_linkage (decl
);
5214 if (DECL_INITIAL (decl
) == NULL_TREE
5215 || DECL_INITIAL (decl
) == error_mark_node
)
5217 /* Without weak symbols, we can use COMMON to merge
5218 uninitialized variables. */
5219 TREE_PUBLIC (decl
) = 1;
5220 DECL_COMMON (decl
) = 1;
5224 /* While for initialized variables, we must use internal
5225 linkage -- which means that multiple copies will not
5227 TREE_PUBLIC (decl
) = 0;
5228 DECL_COMMON (decl
) = 0;
5229 if (warning_at (DECL_SOURCE_LOCATION (decl
), 0,
5230 "sorry: semantics of inline function static "
5231 "data %q#D are wrong (you%'ll wind up "
5232 "with multiple copies)", decl
))
5233 inform (DECL_SOURCE_LOCATION (decl
),
5234 "you can work around this by removing the initializer");
5240 /* Issue an error message if DECL is an uninitialized const variable. */
5243 check_for_uninitialized_const_var (tree decl
)
5245 tree type
= strip_array_types (TREE_TYPE (decl
));
5247 /* ``Unless explicitly declared extern, a const object does not have
5248 external linkage and must be initialized. ($8.4; $12.1)'' ARM
5251 && TREE_CODE (type
) != REFERENCE_TYPE
5252 && (CP_TYPE_CONST_P (type
) || var_in_constexpr_fn (decl
))
5253 && !DECL_INITIAL (decl
))
5255 tree field
= default_init_uninitialized_part (type
);
5259 if (CP_TYPE_CONST_P (type
))
5260 permerror (DECL_SOURCE_LOCATION (decl
),
5261 "uninitialized const %qD", decl
);
5264 error_at (DECL_SOURCE_LOCATION (decl
),
5265 "uninitialized variable %qD in %<constexpr%> function",
5267 cp_function_chain
->invalid_constexpr
= true;
5270 if (CLASS_TYPE_P (type
))
5272 tree defaulted_ctor
;
5274 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
5275 "%q#T has no user-provided default constructor", type
);
5276 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
5278 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
5279 "constructor is not user-provided because it is "
5280 "explicitly defaulted in the class body");
5281 inform (0, "and the implicitly-defined constructor does not "
5282 "initialize %q+#D", field
);
5287 /* Structure holding the current initializer being processed by reshape_init.
5288 CUR is a pointer to the current element being processed, END is a pointer
5289 after the last element present in the initializer. */
5290 typedef struct reshape_iterator_t
5292 constructor_elt
*cur
;
5293 constructor_elt
*end
;
5296 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
5298 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
5299 returned is the next FIELD_DECL (possibly FIELD itself) that can be
5300 initialized. If there are no more such fields, the return value
5304 next_initializable_field (tree field
)
5307 && (TREE_CODE (field
) != FIELD_DECL
5308 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
5309 || DECL_ARTIFICIAL (field
)))
5310 field
= DECL_CHAIN (field
);
5315 /* Subroutine of reshape_init_array and reshape_init_vector, which does
5316 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
5317 INTEGER_CST representing the size of the array minus one (the maximum index),
5318 or NULL_TREE if the array was declared without specifying the size. D is
5319 the iterator within the constructor. */
5322 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
5323 tsubst_flags_t complain
)
5326 bool sized_array_p
= (max_index
&& TREE_CONSTANT (max_index
));
5327 unsigned HOST_WIDE_INT max_index_cst
= 0;
5328 unsigned HOST_WIDE_INT index
;
5330 /* The initializer for an array is always a CONSTRUCTOR. */
5331 new_init
= build_constructor (init_list_type_node
, NULL
);
5335 /* Minus 1 is used for zero sized arrays. */
5336 if (integer_all_onesp (max_index
))
5339 if (tree_fits_uhwi_p (max_index
))
5340 max_index_cst
= tree_to_uhwi (max_index
);
5341 /* sizetype is sign extended, not zero extended. */
5343 max_index_cst
= tree_to_uhwi (fold_convert (size_type_node
, max_index
));
5346 /* Loop until there are no more initializers. */
5348 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5352 constructor_elt
*old_cur
= d
->cur
;
5354 check_array_designated_initializer (d
->cur
, index
);
5355 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5357 if (elt_init
== error_mark_node
)
5358 return error_mark_node
;
5359 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5360 size_int (index
), elt_init
);
5361 if (!TREE_CONSTANT (elt_init
))
5362 TREE_CONSTANT (new_init
) = false;
5364 /* This can happen with an invalid initializer (c++/54501). */
5365 if (d
->cur
== old_cur
&& !sized_array_p
)
5372 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5373 Parameters are the same of reshape_init_r. */
5376 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5378 tree max_index
= NULL_TREE
;
5380 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5382 if (TYPE_DOMAIN (type
))
5383 max_index
= array_type_nelts (type
);
5385 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5388 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5389 Parameters are the same of reshape_init_r. */
5392 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5394 tree max_index
= NULL_TREE
;
5396 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5398 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5400 tree value
= d
->cur
->value
;
5401 if (!same_type_p (TREE_TYPE (value
), type
))
5403 if (complain
& tf_error
)
5404 error ("invalid type %qT as initializer for a vector of type %qT",
5405 TREE_TYPE (d
->cur
->value
), type
);
5406 value
= error_mark_node
;
5412 /* For a vector, we initialize it as an array of the appropriate size. */
5413 if (TREE_CODE (type
) == VECTOR_TYPE
)
5414 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5416 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5419 /* Subroutine of reshape_init_r, processes the initializers for classes
5420 or union. Parameters are the same of reshape_init_r. */
5423 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5424 tsubst_flags_t complain
)
5429 gcc_assert (CLASS_TYPE_P (type
));
5431 /* The initializer for a class is always a CONSTRUCTOR. */
5432 new_init
= build_constructor (init_list_type_node
, NULL
);
5433 field
= next_initializable_field (TYPE_FIELDS (type
));
5439 An initializer for an aggregate member that is an
5440 empty class shall have the form of an empty
5441 initializer-list {}. */
5442 if (!first_initializer_p
)
5444 if (complain
& tf_error
)
5445 error ("initializer for %qT must be brace-enclosed", type
);
5446 return error_mark_node
;
5451 /* Loop through the initializable fields, gathering initializers. */
5452 while (d
->cur
!= d
->end
)
5455 constructor_elt
*old_cur
= d
->cur
;
5457 /* Handle designated initializers, as an extension. */
5460 if (d
->cur
->index
== error_mark_node
)
5461 return error_mark_node
;
5463 if (TREE_CODE (d
->cur
->index
) == FIELD_DECL
)
5464 /* We already reshaped this. */
5465 gcc_assert (d
->cur
->index
== field
);
5466 else if (TREE_CODE (d
->cur
->index
) == IDENTIFIER_NODE
)
5467 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5470 if (complain
& tf_error
)
5471 error ("%<[%E] =%> used in a GNU-style designated initializer"
5472 " for class %qT", d
->cur
->index
, type
);
5473 return error_mark_node
;
5476 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5478 if (complain
& tf_error
)
5479 error ("%qT has no non-static data member named %qD", type
,
5481 return error_mark_node
;
5485 /* If we processed all the member of the class, we are done. */
5489 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5490 /*first_initializer_p=*/false, complain
);
5491 if (field_init
== error_mark_node
)
5492 return error_mark_node
;
5494 if (d
->cur
== old_cur
&& d
->cur
->index
)
5496 /* This can happen with an invalid initializer for a flexible
5497 array member (c++/54441). */
5498 if (complain
& tf_error
)
5499 error ("invalid initializer for %q#D", field
);
5500 return error_mark_node
;
5503 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5507 When a union is initialized with a brace-enclosed
5508 initializer, the braces shall only contain an
5509 initializer for the first member of the union. */
5510 if (TREE_CODE (type
) == UNION_TYPE
)
5513 field
= next_initializable_field (DECL_CHAIN (field
));
5519 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5520 designators are not valid; either complain or return true to indicate
5521 that reshape_init_r should return error_mark_node. */
5524 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5528 if (complain
& tf_error
)
5529 error ("C99 designator %qE outside aggregate initializer",
5537 /* Subroutine of reshape_init, which processes a single initializer (part of
5538 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5539 iterator within the CONSTRUCTOR which points to the initializer to process.
5540 FIRST_INITIALIZER_P is true if this is the first initializer of the
5541 outermost CONSTRUCTOR node. */
5544 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5545 tsubst_flags_t complain
)
5547 tree init
= d
->cur
->value
;
5549 if (error_operand_p (init
))
5550 return error_mark_node
;
5552 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5553 && has_designator_problem (d
, complain
))
5554 return error_mark_node
;
5556 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5558 /* A complex type can be initialized from one or two initializers,
5559 but braces are not elided. */
5561 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5563 if (CONSTRUCTOR_NELTS (init
) > 2)
5565 if (complain
& tf_error
)
5566 error ("too many initializers for %qT", type
);
5568 return error_mark_node
;
5571 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5573 vec
<constructor_elt
, va_gc
> *v
= 0;
5574 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5575 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5576 if (has_designator_problem (d
, complain
))
5577 return error_mark_node
;
5579 init
= build_constructor (init_list_type_node
, v
);
5584 /* A non-aggregate type is always initialized with a single
5586 if (!CP_AGGREGATE_TYPE_P (type
))
5588 /* It is invalid to initialize a non-aggregate type with a
5589 brace-enclosed initializer before C++0x.
5590 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5591 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5592 a CONSTRUCTOR (with a record type). */
5593 if (TREE_CODE (init
) == CONSTRUCTOR
5594 /* Don't complain about a capture-init. */
5595 && !CONSTRUCTOR_IS_DIRECT_INIT (init
)
5596 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5598 if (SCALAR_TYPE_P (type
))
5600 if (cxx_dialect
< cxx11
5601 /* Isn't value-initialization. */
5602 || CONSTRUCTOR_NELTS (init
) > 0)
5604 if (complain
& tf_error
)
5605 error ("braces around scalar initializer for type %qT",
5607 init
= error_mark_node
;
5611 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5618 /* "If T is a class type and the initializer list has a single element of
5619 type cv U, where U is T or a class derived from T, the object is
5620 initialized from that element." Even if T is an aggregate. */
5621 if (cxx_dialect
>= cxx11
&& (CLASS_TYPE_P (type
) || VECTOR_TYPE_P (type
))
5622 && first_initializer_p
5623 && d
->end
- d
->cur
== 1
5624 && reference_related_p (type
, TREE_TYPE (init
)))
5632 All implicit type conversions (clause _conv_) are considered when
5633 initializing the aggregate member with an initializer from an
5634 initializer-list. If the initializer can initialize a member,
5635 the member is initialized. Otherwise, if the member is itself a
5636 non-empty subaggregate, brace elision is assumed and the
5637 initializer is considered for the initialization of the first
5638 member of the subaggregate. */
5639 if (TREE_CODE (init
) != CONSTRUCTOR
5640 /* But don't try this for the first initializer, since that would be
5641 looking through the outermost braces; A a2 = { a1 }; is not a
5642 valid aggregate initialization. */
5643 && !first_initializer_p
5644 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5645 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
,
5652 /* [dcl.init.string]
5654 A char array (whether plain char, signed char, or unsigned char)
5655 can be initialized by a string-literal (optionally enclosed in
5656 braces); a wchar_t array can be initialized by a wide
5657 string-literal (optionally enclosed in braces). */
5658 if (TREE_CODE (type
) == ARRAY_TYPE
5659 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5661 tree str_init
= init
;
5663 /* Strip one level of braces if and only if they enclose a single
5664 element (as allowed by [dcl.init.string]). */
5665 if (!first_initializer_p
5666 && TREE_CODE (str_init
) == CONSTRUCTOR
5667 && vec_safe_length (CONSTRUCTOR_ELTS (str_init
)) == 1)
5669 str_init
= (*CONSTRUCTOR_ELTS (str_init
))[0].value
;
5672 /* If it's a string literal, then it's the initializer for the array
5673 as a whole. Otherwise, continue with normal initialization for
5674 array types (one value per array element). */
5675 if (TREE_CODE (str_init
) == STRING_CST
)
5677 if (has_designator_problem (d
, complain
))
5678 return error_mark_node
;
5684 /* The following cases are about aggregates. If we are not within a full
5685 initializer already, and there is not a CONSTRUCTOR, it means that there
5686 is a missing set of braces (that is, we are processing the case for
5687 which reshape_init exists). */
5688 if (!first_initializer_p
)
5690 if (TREE_CODE (init
) == CONSTRUCTOR
)
5692 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5693 /* There is no need to reshape pointer-to-member function
5694 initializers, as they are always constructed correctly
5695 by the front end. */
5697 else if (COMPOUND_LITERAL_P (init
))
5698 /* For a nested compound literal, there is no need to reshape since
5699 brace elision is not allowed. Even if we decided to allow it,
5700 we should add a call to reshape_init in finish_compound_literal,
5701 before calling digest_init, so changing this code would still
5702 not be necessary. */
5703 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5707 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5708 return reshape_init (type
, init
, complain
);
5712 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5716 /* Dispatch to specialized routines. */
5717 if (CLASS_TYPE_P (type
))
5718 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5719 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5720 return reshape_init_array (type
, d
, complain
);
5721 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5722 return reshape_init_vector (type
, d
, complain
);
5727 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5728 brace-enclosed aggregate initializer.
5730 INIT is the CONSTRUCTOR containing the list of initializers describing
5731 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5732 It may not presently match the shape of the TYPE; for example:
5734 struct S { int a; int b; };
5735 struct S a[] = { 1, 2, 3, 4 };
5737 Here INIT will hold a vector of four elements, rather than a
5738 vector of two elements, each itself a vector of two elements. This
5739 routine transforms INIT from the former form into the latter. The
5740 revised CONSTRUCTOR node is returned. */
5743 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5745 vec
<constructor_elt
, va_gc
> *v
;
5749 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5751 v
= CONSTRUCTOR_ELTS (init
);
5753 /* An empty constructor does not need reshaping, and it is always a valid
5755 if (vec_safe_is_empty (v
))
5758 /* Recurse on this CONSTRUCTOR. */
5760 d
.end
= d
.cur
+ v
->length ();
5762 new_init
= reshape_init_r (type
, &d
, true, complain
);
5763 if (new_init
== error_mark_node
)
5764 return error_mark_node
;
5766 /* Make sure all the element of the constructor were used. Otherwise,
5767 issue an error about exceeding initializers. */
5770 if (complain
& tf_error
)
5771 error ("too many initializers for %qT", type
);
5773 return error_mark_node
;
5779 /* Verify array initializer. Returns true if errors have been reported. */
5782 check_array_initializer (tree decl
, tree type
, tree init
)
5784 tree element_type
= TREE_TYPE (type
);
5786 /* The array type itself need not be complete, because the
5787 initializer may tell us how many elements are in the array.
5788 But, the elements of the array must be complete. */
5789 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5792 error ("elements of array %q#D have incomplete type", decl
);
5794 error ("elements of array %q#T have incomplete type", type
);
5797 /* A compound literal can't have variable size. */
5799 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5800 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5802 error ("variable-sized compound literal");
5808 /* Subroutine of check_initializer; args are passed down from that function.
5809 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5812 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5815 gcc_assert (stmts_are_full_exprs_p ());
5816 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5819 /* Verify INIT (the initializer for DECL), and record the
5820 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5821 grok_reference_init.
5823 If the return value is non-NULL, it is an expression that must be
5824 evaluated dynamically to initialize DECL. */
5827 check_initializer (tree decl
, tree init
, int flags
, vec
<tree
, va_gc
> **cleanups
)
5829 tree type
= TREE_TYPE (decl
);
5830 tree init_code
= NULL
;
5833 /* Things that are going to be initialized need to have complete
5835 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5837 if (DECL_HAS_VALUE_EXPR_P (decl
))
5839 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5840 it doesn't have storage to be initialized. */
5841 gcc_assert (init
== NULL_TREE
);
5845 if (type
== error_mark_node
)
5846 /* We will have already complained. */
5849 if (TREE_CODE (type
) == ARRAY_TYPE
)
5851 if (check_array_initializer (decl
, type
, init
))
5854 else if (!COMPLETE_TYPE_P (type
))
5856 error ("%q#D has incomplete type", decl
);
5857 TREE_TYPE (decl
) = error_mark_node
;
5861 /* There is no way to make a variable-sized class type in GNU C++. */
5862 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5864 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5866 int init_len
= vec_safe_length (CONSTRUCTOR_ELTS (init
));
5867 if (SCALAR_TYPE_P (type
))
5871 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5872 init
= build_zero_init (type
, NULL_TREE
, false);
5874 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5876 error ("scalar object %qD requires one element in initializer",
5878 TREE_TYPE (decl
) = error_mark_node
;
5884 if (TREE_CODE (decl
) == CONST_DECL
)
5886 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5888 DECL_INITIAL (decl
) = init
;
5890 gcc_assert (init
!= NULL_TREE
);
5893 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5895 else if (init
|| type_build_ctor_call (type
)
5896 || TREE_CODE (type
) == REFERENCE_TYPE
)
5898 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5900 init
= grok_reference_init (decl
, type
, init
, flags
);
5901 flags
|= LOOKUP_ALREADY_DIGESTED
;
5904 check_for_uninitialized_const_var (decl
);
5905 /* Do not reshape constructors of vectors (they don't need to be
5907 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5909 if (is_std_init_list (type
))
5911 init
= perform_implicit_conversion (type
, init
,
5912 tf_warning_or_error
);
5913 flags
|= LOOKUP_ALREADY_DIGESTED
;
5915 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5917 /* Don't reshape if the class has constructors. */
5918 if (cxx_dialect
== cxx98
)
5919 error ("in C++98 %qD must be initialized by constructor, "
5923 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5925 error ("opaque vector types cannot be initialized");
5926 init
= error_mark_node
;
5930 init
= reshape_init (type
, init
, tf_warning_or_error
);
5931 flags
|= LOOKUP_NO_NARROWING
;
5934 else if (TREE_CODE (init
) == TREE_LIST
5935 && TREE_TYPE (init
) != unknown_type_node
5936 && !MAYBE_CLASS_TYPE_P (type
))
5938 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5940 /* We get here with code like `int a (2);' */
5941 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
5942 tf_warning_or_error
);
5945 /* If DECL has an array type without a specific bound, deduce the
5946 array size from the initializer. */
5947 maybe_deduce_size_from_array_init (decl
, init
);
5948 type
= TREE_TYPE (decl
);
5949 if (type
== error_mark_node
)
5952 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5953 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5954 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5955 && CP_AGGREGATE_TYPE_P (type
)
5956 && (CLASS_TYPE_P (type
)
5957 || !TYPE_NEEDS_CONSTRUCTING (type
)
5958 || type_has_extended_temps (type
))))
5960 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5962 /* A constructor call is a non-trivial initializer even if
5963 it isn't explicitly written. */
5964 if (TREE_SIDE_EFFECTS (init_code
))
5965 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = true;
5967 /* If this is a constexpr initializer, expand_default_init will
5968 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5969 case, pull the initializer back out and pass it down into
5970 store_init_value. */
5971 while (TREE_CODE (init_code
) == EXPR_STMT
5972 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5973 init_code
= TREE_OPERAND (init_code
, 0);
5974 if (TREE_CODE (init_code
) == INIT_EXPR
)
5976 init
= TREE_OPERAND (init_code
, 1);
5977 init_code
= NULL_TREE
;
5978 /* Don't call digest_init; it's unnecessary and will complain
5979 about aggregate initialization of non-aggregate classes. */
5980 flags
|= LOOKUP_ALREADY_DIGESTED
;
5982 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5984 /* Declared constexpr, but no suitable initializer; massage
5985 init appropriately so we can pass it into store_init_value
5987 if (CLASS_TYPE_P (type
)
5988 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5990 init
= build_functional_cast (type
, init
, tf_none
);
5991 if (TREE_CODE (init
) == TARGET_EXPR
)
5992 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5994 init_code
= NULL_TREE
;
6000 if (init
&& TREE_CODE (init
) != TREE_VEC
)
6002 /* In aggregate initialization of a variable, each element
6003 initialization is a full-expression because there is no
6004 enclosing expression. */
6005 gcc_assert (stmts_are_full_exprs_p ());
6007 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
6009 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
6010 && DECL_INITIAL (decl
)
6011 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
6012 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
6013 warning (0, "array %qD initialized by parenthesized string literal %qE",
6014 decl
, DECL_INITIAL (decl
));
6020 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
6021 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
6022 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
6023 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
6026 check_for_uninitialized_const_var (decl
);
6029 if (init
&& init
!= error_mark_node
)
6030 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
6034 /* We might have set these in cp_finish_decl. */
6035 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = false;
6036 TREE_CONSTANT (decl
) = false;
6039 if (init_code
&& DECL_IN_AGGR_P (decl
))
6041 static int explained
= 0;
6043 if (cxx_dialect
< cxx11
)
6044 error ("initializer invalid for static member with constructor");
6046 error ("non-constant in-class initialization invalid for static "
6047 "member %qD", decl
);
6050 inform (input_location
,
6051 "(an out of class initialization is required)");
6060 /* If DECL is not a local variable, give it RTL. */
6063 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
6065 int toplev
= toplevel_bindings_p ();
6068 /* Set the DECL_ASSEMBLER_NAME for the object. */
6071 /* The `register' keyword, when used together with an
6072 asm-specification, indicates that the variable should be
6073 placed in a particular register. */
6074 if (VAR_P (decl
) && DECL_REGISTER (decl
))
6076 set_user_assembler_name (decl
, asmspec
);
6077 DECL_HARD_REGISTER (decl
) = 1;
6081 if (TREE_CODE (decl
) == FUNCTION_DECL
6082 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
6083 set_builtin_user_assembler_name (decl
, asmspec
);
6084 set_user_assembler_name (decl
, asmspec
);
6088 /* Handle non-variables up front. */
6091 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6095 /* If we see a class member here, it should be a static data
6097 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
6099 gcc_assert (TREE_STATIC (decl
));
6100 /* An in-class declaration of a static data member should be
6101 external; it is only a declaration, and not a definition. */
6102 if (init
== NULL_TREE
)
6103 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
6106 /* We don't create any RTL for local variables. */
6107 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6110 /* We defer emission of local statics until the corresponding
6111 DECL_EXPR is expanded. */
6112 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
6114 /* Defer template instantiations. */
6115 if (DECL_LANG_SPECIFIC (decl
)
6116 && DECL_IMPLICIT_INSTANTIATION (decl
))
6119 /* If we're not deferring, go ahead and assemble the variable. */
6121 rest_of_decl_compilation (decl
, toplev
, at_eof
);
6124 /* walk_tree helper for wrap_temporary_cleanups, below. */
6127 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
6129 /* Stop at types or full-expression boundaries. */
6130 if (TYPE_P (*stmt_p
)
6131 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
6137 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
6139 tree guard
= (tree
)data
;
6140 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
6142 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
6143 /* Tell honor_protect_cleanup_actions to handle this as a separate
6145 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
6147 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
6153 /* We're initializing a local variable which has a cleanup GUARD. If there
6154 are any temporaries used in the initializer INIT of this variable, we
6155 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
6156 variable will be cleaned up properly if one of them throws.
6158 Unfortunately, there's no way to express this properly in terms of
6159 nesting, as the regions for the temporaries overlap the region for the
6160 variable itself; if there are two temporaries, the variable needs to be
6161 the first thing destroyed if either of them throws. However, we only
6162 want to run the variable's cleanup if it actually got constructed. So
6163 we need to guard the temporary cleanups with the variable's cleanup if
6164 they are run on the normal path, but not if they are run on the
6165 exceptional path. We implement this by telling
6166 honor_protect_cleanup_actions to strip the variable cleanup from the
6167 exceptional path. */
6170 wrap_temporary_cleanups (tree init
, tree guard
)
6172 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
6175 /* Generate code to initialize DECL (a local variable). */
6178 initialize_local_var (tree decl
, tree init
)
6180 tree type
= TREE_TYPE (decl
);
6184 gcc_assert (VAR_P (decl
)
6185 || TREE_CODE (decl
) == RESULT_DECL
);
6186 gcc_assert (!TREE_STATIC (decl
));
6188 if (DECL_SIZE (decl
) == NULL_TREE
)
6190 /* If we used it already as memory, it must stay in memory. */
6191 DECL_INITIAL (decl
) = NULL_TREE
;
6192 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
6196 if (type
== error_mark_node
)
6199 /* Compute and store the initial value. */
6200 already_used
= TREE_USED (decl
) || TREE_USED (type
);
6201 if (TREE_USED (type
))
6202 DECL_READ_P (decl
) = 1;
6204 /* Generate a cleanup, if necessary. */
6205 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
6207 /* Perform the initialization. */
6210 tree rinit
= (TREE_CODE (init
) == INIT_EXPR
6211 ? TREE_OPERAND (init
, 1) : NULL_TREE
);
6212 if (rinit
&& !TREE_SIDE_EFFECTS (rinit
))
6214 /* Stick simple initializers in DECL_INITIAL so that
6215 -Wno-init-self works (c++/34772). */
6216 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
6217 DECL_INITIAL (decl
) = rinit
;
6219 if (warn_init_self
&& TREE_CODE (type
) == REFERENCE_TYPE
)
6223 warning_at (DECL_SOURCE_LOCATION (decl
),
6225 "reference %qD is initialized with itself", decl
);
6230 int saved_stmts_are_full_exprs_p
;
6232 /* If we're only initializing a single object, guard the
6233 destructors of any temporaries used in its initializer with
6234 its destructor. This isn't right for arrays because each
6235 element initialization is a full-expression. */
6236 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
6237 wrap_temporary_cleanups (init
, cleanup
);
6239 gcc_assert (building_stmt_list_p ());
6240 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
6241 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
6242 finish_expr_stmt (init
);
6243 current_stmt_tree ()->stmts_are_full_exprs_p
=
6244 saved_stmts_are_full_exprs_p
;
6248 /* Set this to 0 so we can tell whether an aggregate which was
6249 initialized was ever used. Don't do this if it has a
6250 destructor, so we don't complain about the 'resource
6251 allocation is initialization' idiom. Now set
6252 attribute((unused)) on types so decls of that type will be
6253 marked used. (see TREE_USED, above.) */
6254 if (TYPE_NEEDS_CONSTRUCTING (type
)
6256 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
6257 && DECL_NAME (decl
))
6258 TREE_USED (decl
) = 0;
6259 else if (already_used
)
6260 TREE_USED (decl
) = 1;
6263 finish_decl_cleanup (decl
, cleanup
);
6266 /* DECL is a VAR_DECL for a compiler-generated variable with static
6267 storage duration (like a virtual table) whose initializer is a
6268 compile-time constant. Initialize the variable and provide it to the
6272 initialize_artificial_var (tree decl
, vec
<constructor_elt
, va_gc
> *v
)
6275 gcc_assert (DECL_ARTIFICIAL (decl
));
6276 init
= build_constructor (TREE_TYPE (decl
), v
);
6277 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
6278 DECL_INITIAL (decl
) = init
;
6279 DECL_INITIALIZED_P (decl
) = 1;
6280 determine_visibility (decl
);
6281 layout_var_decl (decl
);
6282 maybe_commonize_var (decl
);
6283 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
6286 /* INIT is the initializer for a variable, as represented by the
6287 parser. Returns true iff INIT is type-dependent. */
6290 type_dependent_init_p (tree init
)
6292 if (TREE_CODE (init
) == TREE_LIST
)
6293 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6294 return any_type_dependent_elements_p (init
);
6295 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6296 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6298 vec
<constructor_elt
, va_gc
> *elts
;
6302 elts
= CONSTRUCTOR_ELTS (init
);
6303 nelts
= vec_safe_length (elts
);
6304 for (i
= 0; i
< nelts
; ++i
)
6305 if (type_dependent_init_p ((*elts
)[i
].value
))
6309 /* It must be a simple expression, e.g., int i = 3; */
6310 return type_dependent_expression_p (init
);
6315 /* INIT is the initializer for a variable, as represented by the
6316 parser. Returns true iff INIT is value-dependent. */
6319 value_dependent_init_p (tree init
)
6321 if (TREE_CODE (init
) == TREE_LIST
)
6322 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
6323 return any_value_dependent_elements_p (init
);
6324 else if (TREE_CODE (init
) == CONSTRUCTOR
)
6325 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
6327 vec
<constructor_elt
, va_gc
> *elts
;
6331 elts
= CONSTRUCTOR_ELTS (init
);
6332 nelts
= vec_safe_length (elts
);
6333 for (i
= 0; i
< nelts
; ++i
)
6334 if (value_dependent_init_p ((*elts
)[i
].value
))
6338 /* It must be a simple expression, e.g., int i = 3; */
6339 return value_dependent_expression_p (init
);
6344 /* Finish processing of a declaration;
6345 install its line number and initial value.
6346 If the length of an array type is not known before,
6347 it must be determined now, from the initial value, or it is an error.
6349 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
6350 true, then INIT is an integral constant expression.
6352 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
6353 if the (init) syntax was used. */
6356 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
6357 tree asmspec_tree
, int flags
)
6360 vec
<tree
, va_gc
> *cleanups
= NULL
;
6361 const char *asmspec
= NULL
;
6362 int was_readonly
= 0;
6363 bool var_definition_p
= false;
6366 if (decl
== error_mark_node
)
6371 error ("assignment (not initialization) in declaration");
6375 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
6376 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
6377 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
6379 type
= TREE_TYPE (decl
);
6380 if (type
== error_mark_node
)
6383 /* If a name was specified, get the string. */
6384 if (at_namespace_scope_p ())
6385 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
6386 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
6387 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
6389 if (current_class_type
6390 && CP_DECL_CONTEXT (decl
) == current_class_type
6391 && TYPE_BEING_DEFINED (current_class_type
)
6392 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6393 && (DECL_INITIAL (decl
) || init
))
6394 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6396 if (TREE_CODE (decl
) != FUNCTION_DECL
6397 && (auto_node
= type_uses_auto (type
)))
6400 if (init
== NULL_TREE
)
6402 if (DECL_LANG_SPECIFIC (decl
)
6403 && DECL_TEMPLATE_INSTANTIATION (decl
)
6404 && !DECL_TEMPLATE_INSTANTIATED (decl
))
6406 /* init is null because we're deferring instantiating the
6407 initializer until we need it. Well, we need it now. */
6408 instantiate_decl (decl
, /*defer_ok*/true, /*expl*/false);
6412 error ("declaration of %q#D has no initializer", decl
);
6413 TREE_TYPE (decl
) = error_mark_node
;
6417 if (TREE_CODE (d_init
) == TREE_LIST
)
6418 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6419 tf_warning_or_error
);
6420 d_init
= resolve_nondeduced_context (d_init
);
6421 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6423 if (type
== error_mark_node
)
6425 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
6428 if (!ensure_literal_type_for_constexpr_object (decl
))
6429 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6432 && DECL_CLASS_SCOPE_P (decl
)
6433 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6434 check_static_variable_definition (decl
, type
);
6436 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6439 if (init
== ridpointers
[(int)RID_DELETE
])
6441 /* FIXME check this is 1st decl. */
6442 DECL_DELETED_FN (decl
) = 1;
6443 DECL_DECLARED_INLINE_P (decl
) = 1;
6444 DECL_INITIAL (decl
) = error_mark_node
;
6445 FOR_EACH_CLONE (clone
, decl
)
6447 DECL_DELETED_FN (clone
) = 1;
6448 DECL_DECLARED_INLINE_P (clone
) = 1;
6449 DECL_INITIAL (clone
) = error_mark_node
;
6453 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6455 if (defaultable_fn_check (decl
))
6456 DECL_DEFAULTED_FN (decl
) = 1;
6458 DECL_INITIAL (decl
) = NULL_TREE
;
6462 if (init
&& VAR_P (decl
))
6464 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6465 /* If DECL is a reference, then we want to know whether init is a
6466 reference constant; init_const_expr_p as passed tells us whether
6467 it's an rvalue constant. */
6468 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6469 init_const_expr_p
= potential_constant_expression (init
);
6470 if (init_const_expr_p
)
6472 /* Set these flags now for templates. We'll update the flags in
6473 store_init_value for instantiations. */
6474 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6475 if (decl_maybe_constant_var_p (decl
))
6476 TREE_CONSTANT (decl
) = 1;
6480 if (processing_template_decl
)
6482 bool type_dependent_p
;
6484 /* Add this declaration to the statement-tree. */
6485 if (at_function_scope_p ())
6486 add_decl_expr (decl
);
6488 type_dependent_p
= dependent_type_p (type
);
6490 if (check_for_bare_parameter_packs (init
))
6493 DECL_INITIAL (decl
) = NULL_TREE
;
6496 /* Generally, initializers in templates are expanded when the
6497 template is instantiated. But, if DECL is a variable constant
6498 then it can be used in future constant expressions, so its value
6499 must be available. */
6501 if (!VAR_P (decl
) || dependent_type_p (type
))
6502 /* We can't do anything if the decl has dependent type. */;
6504 && init_const_expr_p
6505 && !type_dependent_p
6506 && TREE_CODE (type
) != REFERENCE_TYPE
6507 && decl_maybe_constant_var_p (decl
)
6508 && !type_dependent_init_p (init
)
6509 && !value_dependent_init_p (init
))
6511 /* This variable seems to be a non-dependent constant, so process
6512 its initializer. If check_initializer returns non-null the
6513 initialization wasn't constant after all. */
6515 cleanups
= make_tree_vector ();
6516 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6517 if (init_code
== NULL_TREE
)
6519 release_tree_vector (cleanups
);
6521 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6523 /* Deduce array size even if the initializer is dependent. */
6524 maybe_deduce_size_from_array_init (decl
, init
);
6525 /* And complain about multiple initializers. */
6526 if (init
&& TREE_CODE (init
) == TREE_LIST
&& TREE_CHAIN (init
)
6527 && !MAYBE_CLASS_TYPE_P (type
))
6528 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
6529 tf_warning_or_error
);
6533 DECL_INITIAL (decl
) = init
;
6537 /* Just store non-static data member initializers for later. */
6538 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6539 DECL_INITIAL (decl
) = init
;
6541 /* Take care of TYPE_DECLs up front. */
6542 if (TREE_CODE (decl
) == TYPE_DECL
)
6544 if (type
!= error_mark_node
6545 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6547 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6548 warning (0, "shadowing previous type declaration of %q#D", decl
);
6549 set_identifier_type_value (DECL_NAME (decl
), decl
);
6552 /* If we have installed this as the canonical typedef for this
6553 type, and that type has not been defined yet, delay emitting
6554 the debug information for it, as we will emit it later. */
6555 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6556 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6557 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6559 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6564 /* A reference will be modified here, as it is initialized. */
6565 if (! DECL_EXTERNAL (decl
)
6566 && TREE_READONLY (decl
)
6567 && TREE_CODE (type
) == REFERENCE_TYPE
)
6570 TREE_READONLY (decl
) = 0;
6575 /* If this is a local variable that will need a mangled name,
6576 register it now. We must do this before processing the
6577 initializer for the variable, since the initialization might
6578 require a guard variable, and since the mangled name of the
6579 guard variable will depend on the mangled name of this
6581 if (DECL_FUNCTION_SCOPE_P (decl
)
6582 && TREE_STATIC (decl
)
6583 && !DECL_ARTIFICIAL (decl
))
6585 push_local_name (decl
);
6586 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6587 || DECL_DESTRUCTOR_P (current_function_decl
))
6588 /* Normally local_decls is populated during GIMPLE lowering,
6589 but [cd]tors are never actually compiled directly. We need
6590 to put statics on the list so we can deal with the label
6591 address extension. FIXME. */
6592 add_local_decl (cfun
, decl
);
6595 /* Convert the initializer to the type of DECL, if we have not
6596 already initialized DECL. */
6597 if (!DECL_INITIALIZED_P (decl
)
6598 /* If !DECL_EXTERNAL then DECL is being defined. In the
6599 case of a static data member initialized inside the
6600 class-specifier, there can be an initializer even if DECL
6601 is *not* defined. */
6602 && (!DECL_EXTERNAL (decl
) || init
))
6604 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6607 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6608 /* Allow libjava/prims.cc define primitive classes. */
6609 if (init
!= NULL_TREE
6610 || jclass
== NULL_TREE
6611 || TREE_CODE (jclass
) != TYPE_DECL
6612 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6613 || !same_type_ignoring_top_level_qualifiers_p
6614 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6615 error ("Java object %qD not allocated with %<new%>", decl
);
6618 cleanups
= make_tree_vector ();
6619 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6625 The memory occupied by any object of static storage
6626 duration is zero-initialized at program startup before
6627 any other initialization takes place.
6629 We cannot create an appropriate initializer until after
6630 the type of DECL is finalized. If DECL_INITIAL is set,
6631 then the DECL is statically initialized, and any
6632 necessary zero-initialization has already been performed. */
6633 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6634 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6635 /*nelts=*/NULL_TREE
,
6636 /*static_storage_p=*/true);
6637 /* Remember that the initialization for this variable has
6639 DECL_INITIALIZED_P (decl
) = 1;
6640 /* This declaration is the definition of this variable,
6641 unless we are initializing a static data member within
6642 the class specifier. */
6643 if (!DECL_EXTERNAL (decl
))
6644 var_definition_p
= true;
6646 /* If the variable has an array type, lay out the type, even if
6647 there is no initializer. It is valid to index through the
6648 array, and we must get TYPE_ALIGN set correctly on the array
6650 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6653 if (TREE_STATIC (decl
)
6654 && !at_function_scope_p ()
6655 && current_function_decl
== NULL
)
6656 /* So decl is a global variable or a static member of a
6657 non local class. Record the types it uses
6658 so that we can decide later to emit debug info for them. */
6659 record_types_used_by_current_var_decl (decl
);
6661 else if (TREE_CODE (decl
) == FIELD_DECL
6662 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6663 error ("non-static data member %qD has Java class type", decl
);
6665 /* Add this declaration to the statement-tree. This needs to happen
6666 after the call to check_initializer so that the DECL_EXPR for a
6667 reference temp is added before the DECL_EXPR for the reference itself. */
6668 if (DECL_FUNCTION_SCOPE_P (decl
))
6670 /* If we're building a variable sized type, and we might be
6671 reachable other than via the top of the current binding
6672 level, then create a new BIND_EXPR so that we deallocate
6673 the object at the right time. */
6676 && !TREE_CONSTANT (DECL_SIZE (decl
))
6677 && STATEMENT_LIST_HAS_LABEL (cur_stmt_list
))
6680 bind
= build3 (BIND_EXPR
, void_type_node
, NULL
, NULL
, NULL
);
6681 TREE_SIDE_EFFECTS (bind
) = 1;
6683 BIND_EXPR_BODY (bind
) = push_stmt_list ();
6685 add_decl_expr (decl
);
6688 /* Let the middle end know about variables and functions -- but not
6689 static data members in uninstantiated class templates. */
6690 if (VAR_OR_FUNCTION_DECL_P (decl
))
6694 layout_var_decl (decl
);
6695 maybe_commonize_var (decl
);
6698 /* This needs to happen after the linkage is set. */
6699 determine_visibility (decl
);
6701 if (var_definition_p
&& TREE_STATIC (decl
))
6703 /* If a TREE_READONLY variable needs initialization
6704 at runtime, it is no longer readonly and we need to
6705 avoid MEM_READONLY_P being set on RTL created for it. */
6708 if (TREE_READONLY (decl
))
6709 TREE_READONLY (decl
) = 0;
6712 else if (was_readonly
)
6713 TREE_READONLY (decl
) = 1;
6715 /* Likewise if it needs destruction. */
6716 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
6717 TREE_READONLY (decl
) = 0;
6720 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6722 /* Check for abstractness of the type. Notice that there is no
6723 need to strip array types here since the check for those types
6724 is already done within create_array_type_for_decl. */
6725 abstract_virtuals_error (decl
, type
);
6727 if (TREE_TYPE (decl
) == error_mark_node
)
6728 /* No initialization required. */
6730 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6734 if (init
== ridpointers
[(int)RID_DEFAULT
])
6736 /* An out-of-class default definition is defined at
6737 the point where it is explicitly defaulted. */
6738 if (DECL_DELETED_FN (decl
))
6739 maybe_explain_implicit_delete (decl
);
6740 else if (DECL_INITIAL (decl
) == error_mark_node
)
6741 synthesize_method (decl
);
6744 error ("function %q#D is initialized like a variable", decl
);
6746 /* else no initialization required. */
6748 else if (DECL_EXTERNAL (decl
)
6749 && ! (DECL_LANG_SPECIFIC (decl
)
6750 && DECL_NOT_REALLY_EXTERN (decl
)))
6753 DECL_INITIAL (decl
) = init
;
6755 /* A variable definition. */
6756 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6757 /* Initialize the local variable. */
6758 initialize_local_var (decl
, init
);
6760 /* If a variable is defined, and then a subsequent
6761 definition with external linkage is encountered, we will
6762 get here twice for the same variable. We want to avoid
6763 calling expand_static_init more than once. For variables
6764 that are not static data members, we can call
6765 expand_static_init only when we actually process the
6766 initializer. It is not legal to redeclare a static data
6767 member, so this issue does not arise in that case. */
6768 else if (var_definition_p
&& TREE_STATIC (decl
))
6769 expand_static_init (decl
, init
);
6772 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6773 reference, insert it in the statement-tree now. */
6777 FOR_EACH_VEC_ELT (*cleanups
, i
, t
)
6778 push_cleanup (decl
, t
, false);
6779 release_tree_vector (cleanups
);
6783 TREE_READONLY (decl
) = 1;
6785 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6788 /* Returns a declaration for a VAR_DECL as if:
6790 extern "C" TYPE NAME;
6792 had been seen. Used to create compiler-generated global
6796 declare_global_var (tree name
, tree type
)
6800 push_to_top_level ();
6801 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6802 TREE_PUBLIC (decl
) = 1;
6803 DECL_EXTERNAL (decl
) = 1;
6804 DECL_ARTIFICIAL (decl
) = 1;
6805 /* If the user has explicitly declared this variable (perhaps
6806 because the code we are compiling is part of a low-level runtime
6807 library), then it is possible that our declaration will be merged
6808 with theirs by pushdecl. */
6809 decl
= pushdecl (decl
);
6810 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6811 pop_from_top_level ();
6816 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6817 if "__cxa_atexit" is not being used) corresponding to the function
6818 to be called when the program exits. */
6821 get_atexit_fn_ptr_type (void)
6825 if (!atexit_fn_ptr_type_node
)
6828 if (flag_use_cxa_atexit
6829 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6830 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6831 arg_type
= ptr_type_node
;
6833 /* The parameter to "atexit" is "void (*)(void)". */
6834 arg_type
= NULL_TREE
;
6836 fn_type
= build_function_type_list (void_type_node
,
6837 arg_type
, NULL_TREE
);
6838 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6841 return atexit_fn_ptr_type_node
;
6844 /* Returns a pointer to the `atexit' function. Note that if
6845 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6846 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6849 get_atexit_node (void)
6855 bool use_aeabi_atexit
;
6860 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6862 /* The declaration for `__cxa_atexit' is:
6864 int __cxa_atexit (void (*)(void *), void *, void *)
6866 We build up the argument types and then the function type
6868 tree argtype0
, argtype1
, argtype2
;
6870 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6871 /* First, build the pointer-to-function type for the first
6873 fn_ptr_type
= get_atexit_fn_ptr_type ();
6874 /* Then, build the rest of the argument types. */
6875 argtype2
= ptr_type_node
;
6876 if (use_aeabi_atexit
)
6878 argtype1
= fn_ptr_type
;
6879 argtype0
= ptr_type_node
;
6883 argtype1
= ptr_type_node
;
6884 argtype0
= fn_ptr_type
;
6886 /* And the final __cxa_atexit type. */
6887 fn_type
= build_function_type_list (integer_type_node
,
6888 argtype0
, argtype1
, argtype2
,
6890 if (use_aeabi_atexit
)
6891 name
= "__aeabi_atexit";
6893 name
= "__cxa_atexit";
6897 /* The declaration for `atexit' is:
6899 int atexit (void (*)());
6901 We build up the argument types and then the function type
6903 fn_ptr_type
= get_atexit_fn_ptr_type ();
6904 /* Build the final atexit type. */
6905 fn_type
= build_function_type_list (integer_type_node
,
6906 fn_ptr_type
, NULL_TREE
);
6910 /* Now, build the function declaration. */
6911 push_lang_context (lang_name_c
);
6912 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
, ECF_LEAF
| ECF_NOTHROW
);
6913 mark_used (atexit_fndecl
);
6914 pop_lang_context ();
6915 atexit_node
= decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6920 /* Like get_atexit_node, but for thread-local cleanups. */
6923 get_thread_atexit_node (void)
6925 /* The declaration for `__cxa_thread_atexit' is:
6927 int __cxa_thread_atexit (void (*)(void *), void *, void *) */
6928 tree fn_type
= build_function_type_list (integer_type_node
,
6929 get_atexit_fn_ptr_type (),
6930 ptr_type_node
, ptr_type_node
,
6933 /* Now, build the function declaration. */
6934 tree atexit_fndecl
= build_library_fn_ptr ("__cxa_thread_atexit", fn_type
,
6935 ECF_LEAF
| ECF_NOTHROW
);
6936 return decay_conversion (atexit_fndecl
, tf_warning_or_error
);
6939 /* Returns the __dso_handle VAR_DECL. */
6942 get_dso_handle_node (void)
6944 if (dso_handle_node
)
6945 return dso_handle_node
;
6947 /* Declare the variable. */
6948 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6951 #ifdef HAVE_GAS_HIDDEN
6952 if (dso_handle_node
!= error_mark_node
)
6954 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6955 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6959 return dso_handle_node
;
6962 /* Begin a new function with internal linkage whose job will be simply
6963 to destroy some particular variable. */
6965 static GTY(()) int start_cleanup_cnt
;
6968 start_cleanup_fn (void)
6973 bool use_cxa_atexit
= flag_use_cxa_atexit
6974 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6976 push_to_top_level ();
6978 /* No need to mangle this. */
6979 push_lang_context (lang_name_c
);
6981 /* Build the name of the function. */
6982 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6983 /* Build the function declaration. */
6984 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6985 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6986 /* It's a function with internal linkage, generated by the
6988 TREE_PUBLIC (fndecl
) = 0;
6989 DECL_ARTIFICIAL (fndecl
) = 1;
6990 /* Make the function `inline' so that it is only emitted if it is
6991 actually needed. It is unlikely that it will be inlined, since
6992 it is only called via a function pointer, but we avoid unnecessary
6993 emissions this way. */
6994 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6995 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6996 /* Build the parameter. */
7001 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
7002 DECL_CONTEXT (parmdecl
) = fndecl
;
7003 TREE_USED (parmdecl
) = 1;
7004 DECL_READ_P (parmdecl
) = 1;
7005 DECL_ARGUMENTS (fndecl
) = parmdecl
;
7009 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
7011 pop_lang_context ();
7013 return current_function_decl
;
7016 /* Finish the cleanup function begun by start_cleanup_fn. */
7019 end_cleanup_fn (void)
7021 expand_or_defer_fn (finish_function (0));
7023 pop_from_top_level ();
7026 /* Generate code to handle the destruction of DECL, an object with
7027 static storage duration. */
7030 register_dtor_fn (tree decl
)
7037 bool ob_parm
, dso_parm
, use_dtor
;
7038 tree arg0
, arg1
, arg2
;
7041 type
= TREE_TYPE (decl
);
7042 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
7045 /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
7046 "__aeabi_atexit"), and DECL is a class object, we can just pass the
7047 destructor to "__cxa_atexit"; we don't have to build a temporary
7048 function to do the cleanup. */
7049 dso_parm
= (flag_use_cxa_atexit
7050 && !targetm
.cxx
.use_atexit_for_cxa_atexit ());
7051 ob_parm
= (DECL_THREAD_LOCAL_P (decl
) || dso_parm
);
7052 use_dtor
= ob_parm
&& CLASS_TYPE_P (type
);
7057 /* Find the destructor. */
7058 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
7059 gcc_assert (idx
>= 0);
7060 cleanup
= (*CLASSTYPE_METHOD_VEC (type
))[idx
];
7061 /* Make sure it is accessible. */
7062 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
,
7063 tf_warning_or_error
);
7067 /* Call build_cleanup before we enter the anonymous function so
7068 that any access checks will be done relative to the current
7069 scope, rather than the scope of the anonymous function. */
7070 build_cleanup (decl
);
7072 /* Now start the function. */
7073 cleanup
= start_cleanup_fn ();
7075 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7076 to the original function, rather than the anonymous one. That
7077 will make the back end think that nested functions are in use,
7078 which causes confusion. */
7079 push_deferring_access_checks (dk_no_check
);
7080 fcall
= build_cleanup (decl
);
7081 pop_deferring_access_checks ();
7083 /* Create the body of the anonymous function. */
7084 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
7085 finish_expr_stmt (fcall
);
7086 finish_compound_stmt (compound_stmt
);
7090 /* Call atexit with the cleanup function. */
7091 mark_used (cleanup
);
7092 cleanup
= build_address (cleanup
);
7094 if (DECL_THREAD_LOCAL_P (decl
))
7095 atex_node
= get_thread_atexit_node ();
7097 atex_node
= get_atexit_node ();
7101 /* We must convert CLEANUP to the type that "__cxa_atexit"
7103 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
7104 /* "__cxa_atexit" will pass the address of DECL to the
7105 cleanup function. */
7107 addr
= build_address (decl
);
7108 /* The declared type of the parameter to "__cxa_atexit" is
7109 "void *". For plain "T*", we could just let the
7110 machinery in cp_build_function_call convert it -- but if the
7111 type is "cv-qualified T *", then we need to convert it
7112 before passing it in, to avoid spurious errors. */
7113 addr
= build_nop (ptr_type_node
, addr
);
7116 /* Since the cleanup functions we build ignore the address
7117 they're given, there's no reason to pass the actual address
7118 in, and, in general, it's cheaper to pass NULL than any
7120 addr
= null_pointer_node
;
7123 arg2
= cp_build_addr_expr (get_dso_handle_node (),
7124 tf_warning_or_error
);
7126 /* Just pass NULL to the dso handle parm if we don't actually
7127 have a DSO handle on this target. */
7128 arg2
= null_pointer_node
;
7134 if (!DECL_THREAD_LOCAL_P (decl
)
7135 && targetm
.cxx
.use_aeabi_atexit ())
7151 return cp_build_function_call_nary (atex_node
, tf_warning_or_error
,
7152 arg0
, arg1
, arg2
, NULL_TREE
);
7155 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
7156 is its initializer. Generate code to handle the construction
7157 and destruction of DECL. */
7160 expand_static_init (tree decl
, tree init
)
7162 gcc_assert (VAR_P (decl
));
7163 gcc_assert (TREE_STATIC (decl
));
7165 /* Some variables require no dynamic initialization. */
7167 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
7169 /* Make sure the destructor is callable. */
7170 cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
7174 if (DECL_THREAD_LOCAL_P (decl
) && DECL_GNU_TLS_P (decl
)
7175 && !DECL_FUNCTION_SCOPE_P (decl
))
7178 error ("non-local variable %qD declared %<__thread%> "
7179 "needs dynamic initialization", decl
);
7181 error ("non-local variable %qD declared %<__thread%> "
7182 "has a non-trivial destructor", decl
);
7183 static bool informed
;
7186 inform (DECL_SOURCE_LOCATION (decl
),
7187 "C++11 %<thread_local%> allows dynamic initialization "
7194 if (DECL_FUNCTION_SCOPE_P (decl
))
7196 /* Emit code to perform this initialization but once. */
7197 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
7198 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
7199 tree guard
, guard_addr
;
7201 /* We don't need thread-safety code for thread-local vars. */
7202 bool thread_guard
= (flag_threadsafe_statics
7203 && !DECL_THREAD_LOCAL_P (decl
));
7205 /* Emit code to perform this initialization but once. This code
7208 static <type> guard;
7209 if (!__atomic_load (guard.first_byte)) {
7210 if (__cxa_guard_acquire (&guard)) {
7213 // Do initialization.
7214 flag = true; __cxa_guard_release (&guard);
7215 // Register variable for destruction at end of program.
7217 if (!flag) __cxa_guard_abort (&guard);
7221 Note that the `flag' variable is only set to 1 *after* the
7222 initialization is complete. This ensures that an exception,
7223 thrown during the construction, will cause the variable to
7224 reinitialized when we pass through this code again, as per:
7228 If the initialization exits by throwing an exception, the
7229 initialization is not complete, so it will be tried again
7230 the next time control enters the declaration.
7232 This process should be thread-safe, too; multiple threads
7233 should not be able to initialize the variable more than
7236 /* Create the guard variable. */
7237 guard
= get_guard (decl
);
7239 /* Begin the conditional initialization. */
7240 if_stmt
= begin_if_stmt ();
7242 finish_if_stmt_cond (get_guard_cond (guard
, thread_guard
), if_stmt
);
7243 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7247 tree vfntype
= NULL_TREE
;
7248 tree acquire_name
, release_name
, abort_name
;
7249 tree acquire_fn
, release_fn
, abort_fn
;
7250 guard_addr
= build_address (guard
);
7252 acquire_name
= get_identifier ("__cxa_guard_acquire");
7253 release_name
= get_identifier ("__cxa_guard_release");
7254 abort_name
= get_identifier ("__cxa_guard_abort");
7255 acquire_fn
= identifier_global_value (acquire_name
);
7256 release_fn
= identifier_global_value (release_name
);
7257 abort_fn
= identifier_global_value (abort_name
);
7259 acquire_fn
= push_library_fn
7260 (acquire_name
, build_function_type_list (integer_type_node
,
7261 TREE_TYPE (guard_addr
),
7263 NULL_TREE
, ECF_NOTHROW
| ECF_LEAF
);
7264 if (!release_fn
|| !abort_fn
)
7265 vfntype
= build_function_type_list (void_type_node
,
7266 TREE_TYPE (guard_addr
),
7269 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
,
7270 ECF_NOTHROW
| ECF_LEAF
);
7272 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
,
7273 ECF_NOTHROW
| ECF_LEAF
);
7275 inner_if_stmt
= begin_if_stmt ();
7276 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
7279 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
7280 begin
= get_target_expr (boolean_false_node
);
7281 flag
= TARGET_EXPR_SLOT (begin
);
7283 TARGET_EXPR_CLEANUP (begin
)
7284 = build3 (COND_EXPR
, void_type_node
, flag
,
7286 build_call_n (abort_fn
, 1, guard_addr
));
7287 CLEANUP_EH_ONLY (begin
) = 1;
7289 /* Do the initialization itself. */
7290 init
= add_stmt_to_compound (begin
, init
);
7291 init
= add_stmt_to_compound
7292 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
7293 init
= add_stmt_to_compound
7294 (init
, build_call_n (release_fn
, 1, guard_addr
));
7297 init
= add_stmt_to_compound (init
, set_guard (guard
));
7299 /* Use atexit to register a function for destroying this static
7301 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
7303 finish_expr_stmt (init
);
7307 finish_compound_stmt (inner_then_clause
);
7308 finish_then_clause (inner_if_stmt
);
7309 finish_if_stmt (inner_if_stmt
);
7312 finish_compound_stmt (then_clause
);
7313 finish_then_clause (if_stmt
);
7314 finish_if_stmt (if_stmt
);
7316 else if (DECL_THREAD_LOCAL_P (decl
))
7317 tls_aggregates
= tree_cons (init
, decl
, tls_aggregates
);
7319 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
7323 /* Make TYPE a complete type based on INITIAL_VALUE.
7324 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
7325 2 if there was no information (in which case assume 0 if DO_DEFAULT),
7326 3 if the initializer list is empty (in pedantic mode). */
7329 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
7332 tree type
, elt_type
;
7334 /* Don't get confused by a CONSTRUCTOR for some other type. */
7335 if (initial_value
&& TREE_CODE (initial_value
) == CONSTRUCTOR
7336 && !BRACE_ENCLOSED_INITIALIZER_P (initial_value
))
7341 unsigned HOST_WIDE_INT i
;
7344 /* An array of character type can be initialized from a
7345 brace-enclosed string constant.
7347 FIXME: this code is duplicated from reshape_init. Probably
7348 we should just call reshape_init here? */
7349 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
7350 && TREE_CODE (initial_value
) == CONSTRUCTOR
7351 && !vec_safe_is_empty (CONSTRUCTOR_ELTS (initial_value
)))
7353 vec
<constructor_elt
, va_gc
> *v
= CONSTRUCTOR_ELTS (initial_value
);
7354 tree value
= (*v
)[0].value
;
7356 if (TREE_CODE (value
) == STRING_CST
7357 && v
->length () == 1)
7358 initial_value
= value
;
7361 /* If any of the elements are parameter packs, we can't actually
7362 complete this type now because the array size is dependent. */
7363 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
7365 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
7368 if (PACK_EXPANSION_P (value
))
7374 failure
= complete_array_type (ptype
, initial_value
, do_default
);
7376 /* We can create the array before the element type is complete, which
7377 means that we didn't have these two bits set in the original type
7378 either. In completing the type, we are expected to propagate these
7379 bits. See also complete_type which does the same thing for arrays
7382 if (TYPE_DOMAIN (type
))
7384 elt_type
= TREE_TYPE (type
);
7385 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
7386 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
7387 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
7393 /* As above, but either give an error or reject zero-size arrays, depending
7397 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
7398 bool do_default
, tsubst_flags_t complain
)
7401 bool sfinae
= !(complain
& tf_error
);
7402 /* In SFINAE context we can't be lenient about zero-size arrays. */
7405 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
7411 /* Not an error. */;
7412 else if (failure
== 1)
7413 error ("initializer fails to determine size of %qT", *ptype
);
7414 else if (failure
== 2)
7417 error ("array size missing in %qT", *ptype
);
7419 else if (failure
== 3)
7420 error ("zero-size array %qT", *ptype
);
7421 *ptype
= error_mark_node
;
7426 /* Return zero if something is declared to be a member of type
7427 CTYPE when in the context of CUR_TYPE. STRING is the error
7428 message to print in that case. Otherwise, quietly return 1. */
7431 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
7433 if (ctype
&& ctype
!= cur_type
)
7435 if (flags
== DTOR_FLAG
)
7436 error ("destructor for alien class %qT cannot be a member", ctype
);
7438 error ("constructor for alien class %qT cannot be a member", ctype
);
7444 /* Subroutine of `grokdeclarator'. */
7446 /* Generate errors possibly applicable for a given set of specifiers.
7447 This is for ARM $7.1.2. */
7450 bad_specifiers (tree object
,
7451 enum bad_spec_place type
,
7462 error ("%qD declared as a %<virtual%> variable", object
);
7464 error ("%qD declared as an %<inline%> variable", object
);
7466 error ("%<const%> and %<volatile%> function specifiers on "
7467 "%qD invalid in variable declaration", object
);
7471 error ("%qD declared as a %<virtual%> parameter", object
);
7473 error ("%qD declared as an %<inline%> parameter", object
);
7475 error ("%<const%> and %<volatile%> function specifiers on "
7476 "%qD invalid in parameter declaration", object
);
7480 error ("%qD declared as a %<virtual%> type", object
);
7482 error ("%qD declared as an %<inline%> type", object
);
7484 error ("%<const%> and %<volatile%> function specifiers on "
7485 "%qD invalid in type declaration", object
);
7489 error ("%qD declared as a %<virtual%> field", object
);
7491 error ("%qD declared as an %<inline%> field", object
);
7493 error ("%<const%> and %<volatile%> function specifiers on "
7494 "%qD invalid in field declaration", object
);
7500 error ("%q+D declared as a friend", object
);
7502 && (TREE_CODE (object
) == TYPE_DECL
7503 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7504 && !TYPE_REFFN_P (TREE_TYPE (object
))
7505 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7506 error ("%q+D declared with an exception specification", object
);
7509 /* DECL is a member function or static data member and is presently
7510 being defined. Check that the definition is taking place in a
7514 check_class_member_definition_namespace (tree decl
)
7516 /* These checks only apply to member functions and static data
7518 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
7519 /* We check for problems with specializations in pt.c in
7520 check_specialization_namespace, where we can issue better
7522 if (processing_specialization
)
7524 /* There are no restrictions on the placement of
7525 explicit instantiations. */
7526 if (processing_explicit_instantiation
)
7530 A member function definition that appears outside of the
7531 class definition shall appear in a namespace scope enclosing
7532 the class definition.
7536 The definition for a static data member shall appear in a
7537 namespace scope enclosing the member's class definition. */
7538 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7539 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7540 decl
, DECL_CONTEXT (decl
));
7543 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7544 METHOD_TYPE for a non-static member function; QUALS are the
7545 cv-qualifiers that apply to the function. */
7548 build_this_parm (tree type
, cp_cv_quals quals
)
7553 cp_cv_quals this_quals
;
7555 if (CLASS_TYPE_P (type
))
7558 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7559 this_type
= build_pointer_type (this_type
);
7562 this_type
= type_of_this_parm (type
);
7563 /* The `this' parameter is implicitly `const'; it cannot be
7565 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7566 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7567 parm
= build_artificial_parm (this_identifier
, qual_type
);
7568 cp_apply_type_quals_to_decl (this_quals
, parm
);
7572 /* DECL is a static member function. Complain if it was declared
7573 with function-cv-quals. */
7576 check_static_quals (tree decl
, cp_cv_quals quals
)
7578 if (quals
!= TYPE_UNQUALIFIED
)
7579 error ("static member function %q#D declared with type qualifiers",
7583 /* Helper function. Replace the temporary this parameter injected
7584 during cp_finish_omp_declare_simd with the real this parameter. */
7587 declare_simd_adjust_this (tree
*tp
, int *walk_subtrees
, void *data
)
7589 tree this_parm
= (tree
) data
;
7590 if (TREE_CODE (*tp
) == PARM_DECL
7591 && DECL_NAME (*tp
) == this_identifier
7592 && *tp
!= this_parm
)
7594 else if (TYPE_P (*tp
))
7599 /* CTYPE is class type, or null if non-class.
7600 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7602 DECLARATOR is the function's name.
7603 PARMS is a chain of PARM_DECLs for the function.
7604 VIRTUALP is truthvalue of whether the function is virtual or not.
7605 FLAGS are to be passed through to `grokclassfn'.
7606 QUALS are qualifiers indicating whether the function is `const'
7608 RAISES is a list of exceptions that this function can raise.
7609 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7610 not look, and -1 if we should not call `grokclassfn' at all.
7612 SFK is the kind of special function (if any) for the new function.
7614 Returns `NULL_TREE' if something goes wrong, after issuing
7615 applicable error messages. */
7618 grokfndecl (tree ctype
,
7622 tree orig_declarator
,
7624 enum overload_flags flags
,
7626 cp_ref_qualifier rqual
,
7633 special_function_kind sfk
,
7638 location_t location
)
7641 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7645 type
= build_ref_qualified_type (type
, rqual
);
7647 type
= build_exception_variant (type
, raises
);
7649 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7651 /* If we have an explicit location, use it, otherwise use whatever
7652 build_lang_decl used (probably input_location). */
7653 if (location
!= UNKNOWN_LOCATION
)
7654 DECL_SOURCE_LOCATION (decl
) = location
;
7656 if (TREE_CODE (type
) == METHOD_TYPE
)
7659 parm
= build_this_parm (type
, quals
);
7660 DECL_CHAIN (parm
) = parms
;
7663 DECL_ARGUMENTS (decl
) = parms
;
7664 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7665 DECL_CONTEXT (t
) = decl
;
7666 /* Propagate volatile out from type to decl. */
7667 if (TYPE_VOLATILE (type
))
7668 TREE_THIS_VOLATILE (decl
) = 1;
7670 /* Setup decl according to sfk. */
7673 case sfk_constructor
:
7674 case sfk_copy_constructor
:
7675 case sfk_move_constructor
:
7676 DECL_CONSTRUCTOR_P (decl
) = 1;
7678 case sfk_destructor
:
7679 DECL_DESTRUCTOR_P (decl
) = 1;
7685 /* If pointers to member functions use the least significant bit to
7686 indicate whether a function is virtual, ensure a pointer
7687 to this function will have that bit clear. */
7688 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7689 && TREE_CODE (type
) == METHOD_TYPE
7690 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7691 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7694 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7698 ("defining explicit specialization %qD in friend declaration",
7702 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7703 tree args
= TREE_OPERAND (orig_declarator
, 1);
7705 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7707 /* Something like `template <class T> friend void f<T>()'. */
7708 error ("invalid use of template-id %qD in declaration "
7709 "of primary template",
7715 /* A friend declaration of the form friend void f<>(). Record
7716 the information in the TEMPLATE_ID_EXPR. */
7717 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7719 gcc_assert (identifier_p (fns
) || TREE_CODE (fns
) == OVERLOAD
);
7720 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7722 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7723 if (TREE_PURPOSE (t
)
7724 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7726 error ("default arguments are not allowed in declaration "
7727 "of friend template specialization %qD",
7733 error ("%<inline%> is not allowed in declaration of friend "
7734 "template specialization %qD",
7737 error ("%<constexpr%> is not allowed in declaration of friend "
7738 "template specialization %qD",
7745 /* If this decl has namespace scope, set that up. */
7747 set_decl_namespace (decl
, in_namespace
, friendp
);
7749 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7751 /* `main' and builtins have implicit 'C' linkage. */
7752 if ((MAIN_NAME_P (declarator
)
7753 || (IDENTIFIER_LENGTH (declarator
) > 10
7754 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7755 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7756 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0)
7757 || (targetcm
.cxx_implicit_extern_c
7758 && targetcm
.cxx_implicit_extern_c(IDENTIFIER_POINTER (declarator
))))
7759 && current_lang_name
== lang_name_cplusplus
7760 && ctype
== NULL_TREE
7761 && DECL_FILE_SCOPE_P (decl
))
7762 SET_DECL_LANGUAGE (decl
, lang_c
);
7764 /* Should probably propagate const out from type to decl I bet (mrs). */
7767 DECL_STATIC_FUNCTION_P (decl
) = 1;
7768 DECL_CONTEXT (decl
) = ctype
;
7772 DECL_DELETED_FN (decl
) = 1;
7776 DECL_CONTEXT (decl
) = ctype
;
7778 check_class_member_definition_namespace (decl
);
7781 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7783 if (PROCESSING_REAL_TEMPLATE_DECL_P())
7784 error ("cannot declare %<::main%> to be a template");
7786 error ("cannot declare %<::main%> to be inline");
7788 error ("cannot declare %<::main%> to be constexpr");
7790 error ("cannot declare %<::main%> to be static");
7795 /* Members of anonymous types and local classes have no linkage; make
7796 them internal. If a typedef is made later, this will be changed. */
7797 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7798 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7801 if (publicp
&& cxx_dialect
== cxx98
)
7803 /* [basic.link]: A name with no linkage (notably, the name of a class
7804 or enumeration declared in a local scope) shall not be used to
7805 declare an entity with linkage.
7807 DR 757 relaxes this restriction for C++0x. */
7808 no_linkage_error (decl
);
7811 TREE_PUBLIC (decl
) = publicp
;
7814 DECL_INTERFACE_KNOWN (decl
) = 1;
7815 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7818 /* If the declaration was declared inline, mark it as such. */
7821 DECL_DECLARED_INLINE_P (decl
) = 1;
7823 DECL_COMDAT (decl
) = 1;
7826 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7828 DECL_EXTERNAL (decl
) = 1;
7829 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7834 ? G_("static member function %qD cannot have cv-qualifier")
7835 : G_("non-member function %qD cannot have cv-qualifier"),
7837 quals
= TYPE_UNQUALIFIED
;
7843 ? G_("static member function %qD cannot have ref-qualifier")
7844 : G_("non-member function %qD cannot have ref-qualifier"),
7846 rqual
= REF_QUAL_NONE
;
7850 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7851 && !grok_op_properties (decl
, /*complain=*/true))
7853 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7855 bool long_long_unsigned_p
;
7857 const char *suffix
= NULL
;
7858 /* [over.literal]/6: Literal operators shall not have C linkage. */
7859 if (DECL_LANGUAGE (decl
) == lang_c
)
7861 error ("literal operator with C linkage");
7865 if (DECL_NAMESPACE_SCOPE_P (decl
))
7867 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7870 error ("%qD has invalid argument list", decl
);
7874 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7875 if (long_long_unsigned_p
)
7877 if (cpp_interpret_int_suffix (parse_in
, suffix
, strlen (suffix
)))
7878 warning (0, "integer suffix %<%s%>"
7879 " shadowed by implementation", suffix
);
7881 else if (long_double_p
)
7883 if (cpp_interpret_float_suffix (parse_in
, suffix
, strlen (suffix
)))
7884 warning (0, "floating point suffix %<%s%>"
7885 " shadowed by implementation", suffix
);
7890 error ("%qD must be a non-member function", decl
);
7896 /* Make the init_value nonzero so pushdecl knows this is not
7897 tentative. error_mark_node is replaced later with the BLOCK. */
7898 DECL_INITIAL (decl
) = error_mark_node
;
7900 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7901 TREE_NOTHROW (decl
) = 1;
7903 if (flag_openmp
|| flag_cilkplus
)
7905 /* Adjust "omp declare simd" attributes. */
7906 tree ods
= lookup_attribute ("omp declare simd", *attrlist
);
7910 for (attr
= ods
; attr
;
7911 attr
= lookup_attribute ("omp declare simd", TREE_CHAIN (attr
)))
7913 if (TREE_CODE (type
) == METHOD_TYPE
)
7914 walk_tree (&TREE_VALUE (attr
), declare_simd_adjust_this
,
7915 DECL_ARGUMENTS (decl
), NULL
);
7916 if (TREE_VALUE (attr
) != NULL_TREE
)
7918 tree cl
= TREE_VALUE (TREE_VALUE (attr
));
7919 cl
= c_omp_declare_simd_clauses_to_numbers
7920 (DECL_ARGUMENTS (decl
), cl
);
7922 TREE_VALUE (TREE_VALUE (attr
)) = cl
;
7924 TREE_VALUE (attr
) = NULL_TREE
;
7930 /* Caller will do the rest of this. */
7934 if (ctype
!= NULL_TREE
)
7935 grokclassfn (ctype
, decl
, flags
);
7938 if (cxx_dialect
>= cxx11
7939 && DECL_DESTRUCTOR_P (decl
)
7940 && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl
))
7941 && !processing_template_decl
)
7942 deduce_noexcept_on_destructor (decl
);
7944 decl
= check_explicit_specialization (orig_declarator
, decl
,
7947 4 * (friendp
!= 0));
7948 if (decl
== error_mark_node
)
7951 if (DECL_STATIC_FUNCTION_P (decl
))
7952 check_static_quals (decl
, quals
);
7956 cplus_decl_attributes (&decl
, *attrlist
, 0);
7957 *attrlist
= NULL_TREE
;
7960 /* Check main's type after attributes have been applied. */
7961 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7963 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7966 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7968 error ("%<::main%> must return %<int%>");
7969 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7970 TREE_TYPE (decl
) = newtype
;
7973 check_main_parameter_types (decl
);
7976 if (ctype
!= NULL_TREE
7977 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7980 tree old_decl
= check_classfn (ctype
, decl
,
7981 (processing_template_decl
7982 > template_class_depth (ctype
))
7983 ? current_template_parms
7986 if (old_decl
== error_mark_node
)
7994 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7995 /* Because grokfndecl is always supposed to return a
7996 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7997 here. We depend on our callers to figure out that its
7998 really a template that's being returned. */
7999 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
8001 if (DECL_STATIC_FUNCTION_P (old_decl
)
8002 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8004 /* Remove the `this' parm added by grokclassfn. */
8005 revert_static_member_fn (decl
);
8006 check_static_quals (decl
, quals
);
8008 if (DECL_ARTIFICIAL (old_decl
))
8010 error ("definition of implicitly-declared %qD", old_decl
);
8013 else if (DECL_DEFAULTED_FN (old_decl
))
8015 error ("definition of explicitly-defaulted %q+D", decl
);
8016 error ("%q+#D explicitly defaulted here", old_decl
);
8020 /* Since we've smashed OLD_DECL to its
8021 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
8022 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
8023 decl
= DECL_TEMPLATE_RESULT (decl
);
8025 /* Attempt to merge the declarations. This can fail, in
8026 the case of some invalid specialization declarations. */
8027 pushed_scope
= push_scope (ctype
);
8028 ok
= duplicate_decls (decl
, old_decl
, friendp
);
8030 pop_scope (pushed_scope
);
8033 error ("no %q#D member function declared in class %qT",
8037 if (ok
== error_mark_node
)
8043 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
8046 if (ctype
== NULL_TREE
|| check
)
8050 DECL_VIRTUAL_P (decl
) = 1;
8055 /* decl is a FUNCTION_DECL.
8056 specifiers are the parsed virt-specifiers.
8058 Set flags to reflect the virt-specifiers.
8063 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
8065 if (decl
== NULL_TREE
)
8067 if (specifiers
& VIRT_SPEC_OVERRIDE
)
8068 DECL_OVERRIDE_P (decl
) = 1;
8069 if (specifiers
& VIRT_SPEC_FINAL
)
8070 DECL_FINAL_P (decl
) = 1;
8074 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
8075 the linkage that DECL will receive in the object file. */
8078 set_linkage_for_static_data_member (tree decl
)
8080 /* A static data member always has static storage duration and
8081 external linkage. Note that static data members are forbidden in
8082 local classes -- the only situation in which a class has
8083 non-external linkage. */
8084 TREE_PUBLIC (decl
) = 1;
8085 TREE_STATIC (decl
) = 1;
8086 /* For non-template classes, static data members are always put
8087 out in exactly those files where they are defined, just as
8088 with ordinary namespace-scope variables. */
8089 if (!processing_template_decl
)
8090 DECL_INTERFACE_KNOWN (decl
) = 1;
8093 /* Create a VAR_DECL named NAME with the indicated TYPE.
8095 If SCOPE is non-NULL, it is the class type or namespace containing
8096 the variable. If SCOPE is NULL, the variable should is created in
8097 the innermost enclosing scope. */
8100 grokvardecl (tree type
,
8102 tree orig_declarator
,
8103 const cp_decl_specifier_seq
*declspecs
,
8110 tree explicit_scope
;
8112 gcc_assert (!name
|| identifier_p (name
));
8114 /* Compute the scope in which to place the variable, but remember
8115 whether or not that scope was explicitly specified by the user. */
8116 explicit_scope
= scope
;
8119 /* An explicit "extern" specifier indicates a namespace-scope
8121 if (declspecs
->storage_class
== sc_extern
)
8122 scope
= current_decl_namespace ();
8123 else if (!at_function_scope_p ())
8124 scope
= current_scope ();
8128 && (/* If the variable is a namespace-scope variable declared in a
8129 template, we need DECL_LANG_SPECIFIC. */
8130 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
8131 /* Similarly for namespace-scope variables with language linkage
8133 || (TREE_CODE (scope
) == NAMESPACE_DECL
8134 && current_lang_name
!= lang_name_cplusplus
)
8135 /* Similarly for static data members. */
8137 /* Similarly for explicit specializations. */
8139 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)))
8140 decl
= build_lang_decl (VAR_DECL
, name
, type
);
8142 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
8144 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
8145 set_decl_namespace (decl
, explicit_scope
, 0);
8147 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
8149 if (declspecs
->storage_class
== sc_extern
)
8151 DECL_THIS_EXTERN (decl
) = 1;
8152 DECL_EXTERNAL (decl
) = !initialized
;
8155 if (DECL_CLASS_SCOPE_P (decl
))
8157 set_linkage_for_static_data_member (decl
);
8158 /* This function is only called with out-of-class definitions. */
8159 DECL_EXTERNAL (decl
) = 0;
8160 check_class_member_definition_namespace (decl
);
8162 /* At top level, either `static' or no s.c. makes a definition
8163 (perhaps tentative), and absence of `static' makes it public. */
8164 else if (toplevel_bindings_p ())
8166 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
8167 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8168 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8170 /* Not at top level, only `static' makes a static definition. */
8173 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
8174 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8177 if (decl_spec_seq_has_spec_p (declspecs
, ds_thread
))
8179 if (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
8180 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
8181 if (declspecs
->gnu_thread_keyword_p
)
8182 DECL_GNU_TLS_P (decl
) = true;
8185 /* If the type of the decl has no linkage, make sure that we'll
8186 notice that in mark_used. */
8187 if (cxx_dialect
> cxx98
8188 && decl_linkage (decl
) != lk_none
8189 && DECL_LANG_SPECIFIC (decl
) == NULL
8190 && !DECL_EXTERN_C_P (decl
)
8191 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
8192 retrofit_lang_decl (decl
);
8194 if (TREE_PUBLIC (decl
))
8196 /* [basic.link]: A name with no linkage (notably, the name of a class
8197 or enumeration declared in a local scope) shall not be used to
8198 declare an entity with linkage.
8200 DR 757 relaxes this restriction for C++0x. */
8201 if (cxx_dialect
< cxx11
)
8202 no_linkage_error (decl
);
8205 DECL_INTERFACE_KNOWN (decl
) = 1;
8207 // Handle explicit specializations and instantiations of variable templates.
8208 if (orig_declarator
)
8209 decl
= check_explicit_specialization (orig_declarator
, decl
,
8212 return decl
!= error_mark_node
? decl
: NULL_TREE
;
8215 /* Create and return a canonical pointer to member function type, for
8216 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8219 build_ptrmemfunc_type (tree type
)
8224 if (type
== error_mark_node
)
8227 /* Make sure that we always have the unqualified pointer-to-member
8229 if (cp_cv_quals quals
= cp_type_quals (type
))
8231 tree unqual
= build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8232 return cp_build_qualified_type (unqual
, quals
);
8235 /* If a canonical type already exists for this type, use it. We use
8236 this method instead of type_hash_canon, because it only does a
8237 simple equality check on the list of field members. */
8239 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8242 t
= make_node (RECORD_TYPE
);
8244 /* Let the front end know this is a pointer to member function. */
8245 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8247 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
8250 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
8252 DECL_CHAIN (field
) = fields
;
8255 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
8257 /* Zap out the name so that the back end will give us the debugging
8258 information for this anonymous RECORD_TYPE. */
8259 TYPE_NAME (t
) = NULL_TREE
;
8261 /* Cache this pointer-to-member type so that we can find it again
8263 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8265 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
8266 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8267 else if (TYPE_CANONICAL (type
) != type
)
8268 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
8273 /* Create and return a pointer to data member type. */
8276 build_ptrmem_type (tree class_type
, tree member_type
)
8278 if (TREE_CODE (member_type
) == METHOD_TYPE
)
8280 cp_cv_quals quals
= type_memfn_quals (member_type
);
8281 cp_ref_qualifier rqual
= type_memfn_rqual (member_type
);
8282 member_type
= build_memfn_type (member_type
, class_type
, quals
, rqual
);
8283 return build_ptrmemfunc_type (build_pointer_type (member_type
));
8287 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
8288 return build_offset_type (class_type
, member_type
);
8292 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8293 Check to see that the definition is valid. Issue appropriate error
8294 messages. Return 1 if the definition is particularly bad, or 0
8298 check_static_variable_definition (tree decl
, tree type
)
8300 /* Can't check yet if we don't know the type. */
8301 if (dependent_type_p (type
))
8303 /* If DECL is declared constexpr, we'll do the appropriate checks
8304 in check_initializer. */
8305 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
8307 else if (cxx_dialect
>= cxx11
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8309 if (!COMPLETE_TYPE_P (type
))
8310 error ("in-class initialization of static data member %q#D of "
8311 "incomplete type", decl
);
8312 else if (literal_type_p (type
))
8313 permerror (input_location
,
8314 "%<constexpr%> needed for in-class initialization of "
8315 "static data member %q#D of non-integral type", decl
);
8317 error ("in-class initialization of static data member %q#D of "
8318 "non-literal type", decl
);
8322 /* Motion 10 at San Diego: If a static const integral data member is
8323 initialized with an integral constant expression, the initializer
8324 may appear either in the declaration (within the class), or in
8325 the definition, but not both. If it appears in the class, the
8326 member is a member constant. The file-scope definition is always
8328 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
8330 error ("invalid in-class initialization of static data member "
8331 "of non-integral type %qT",
8335 else if (!CP_TYPE_CONST_P (type
))
8336 error ("ISO C++ forbids in-class initialization of non-const "
8337 "static member %qD",
8339 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
8340 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids initialization of member constant "
8341 "%qD of non-integral type %qT", decl
, type
);
8346 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
8347 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
8348 expressions out into temporary variables so that walk_tree doesn't
8349 step into them (c++/15764). */
8352 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8354 hash_set
<tree
> *pset
= (hash_set
<tree
> *)data
;
8355 tree expr
= *expr_p
;
8356 if (TREE_CODE (expr
) == SAVE_EXPR
)
8358 tree op
= TREE_OPERAND (expr
, 0);
8359 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
8360 if (TREE_SIDE_EFFECTS (op
))
8361 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
8364 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
8369 /* Entry point for the above. */
8372 stabilize_vla_size (tree size
)
8374 hash_set
<tree
> pset
;
8375 /* Break out any function calls into temporary variables. */
8376 cp_walk_tree (&size
, stabilize_save_expr_r
, &pset
, &pset
);
8379 /* Helper function for compute_array_index_type. Look for SIZEOF_EXPR
8380 not inside of SAVE_EXPR and fold them. */
8383 fold_sizeof_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
8385 tree expr
= *expr_p
;
8386 if (TREE_CODE (expr
) == SAVE_EXPR
|| TYPE_P (expr
))
8388 else if (TREE_CODE (expr
) == SIZEOF_EXPR
)
8390 *(bool *)data
= true;
8391 if (SIZEOF_EXPR_TYPE_P (expr
))
8392 expr
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (expr
, 0)),
8393 SIZEOF_EXPR
, false);
8394 else if (TYPE_P (TREE_OPERAND (expr
, 0)))
8395 expr
= cxx_sizeof_or_alignof_type (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8398 expr
= cxx_sizeof_or_alignof_expr (TREE_OPERAND (expr
, 0), SIZEOF_EXPR
,
8400 if (expr
== error_mark_node
)
8401 expr
= size_one_node
;
8408 /* Given the SIZE (i.e., number of elements) in an array, compute an
8409 appropriate index type for the array. If non-NULL, NAME is the
8410 name of the thing being declared. */
8413 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
8418 if (error_operand_p (size
))
8419 return error_mark_node
;
8421 if (!type_dependent_expression_p (size
))
8423 tree type
= TREE_TYPE (size
);
8425 mark_rvalue_use (size
);
8427 if (cxx_dialect
< cxx11
&& TREE_CODE (size
) == NOP_EXPR
8428 && TREE_SIDE_EFFECTS (size
))
8429 /* In C++98, we mark a non-constant array bound with a magic
8430 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
8433 size
= instantiate_non_dependent_expr_sfinae (size
, complain
);
8435 if (CLASS_TYPE_P (type
)
8436 && CLASSTYPE_LITERAL_P (type
))
8438 size
= build_expr_type_conversion (WANT_INT
, size
, true);
8441 if (!(complain
& tf_error
))
8442 return error_mark_node
;
8444 error ("size of array %qD has non-integral type %qT",
8447 error ("size of array has non-integral type %qT", type
);
8448 size
= integer_one_node
;
8450 if (size
== error_mark_node
)
8451 return error_mark_node
;
8452 type
= TREE_TYPE (size
);
8455 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8456 size
= maybe_constant_value (size
);
8458 if (!TREE_CONSTANT (size
))
8462 if (error_operand_p (size
))
8463 return error_mark_node
;
8465 /* The array bound must be an integer type. */
8466 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
8468 if (!(complain
& tf_error
))
8469 return error_mark_node
;
8471 error ("size of array %qD has non-integral type %qT", name
, type
);
8473 error ("size of array has non-integral type %qT", type
);
8474 size
= integer_one_node
;
8475 type
= TREE_TYPE (size
);
8479 /* A type is dependent if it is...an array type constructed from any
8480 dependent type or whose size is specified by a constant expression
8481 that is value-dependent. */
8482 /* We can only call value_dependent_expression_p on integral constant
8483 expressions; treat non-constant expressions as dependent, too. */
8484 if (processing_template_decl
8485 && (type_dependent_expression_p (size
)
8486 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
8488 /* We cannot do any checking for a SIZE that isn't known to be
8489 constant. Just build the index type and mark that it requires
8490 structural equality checks. */
8491 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8492 size
, size_one_node
));
8493 TYPE_DEPENDENT_P (itype
) = 1;
8494 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8495 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8499 /* Normally, the array-bound will be a constant. */
8500 if (TREE_CODE (size
) == INTEGER_CST
)
8502 /* Check to see if the array bound overflowed. Make that an
8503 error, no matter how generous we're being. */
8504 constant_expression_error (size
);
8506 /* An array must have a positive number of elements. */
8507 if (tree_int_cst_lt (size
, integer_zero_node
))
8509 if (!(complain
& tf_error
))
8510 return error_mark_node
;
8512 error ("size of array %qD is negative", name
);
8514 error ("size of array is negative");
8515 size
= integer_one_node
;
8517 /* As an extension we allow zero-sized arrays. */
8518 else if (integer_zerop (size
))
8520 if (!(complain
& tf_error
))
8521 /* We must fail if performing argument deduction (as
8522 indicated by the state of complain), so that
8523 another substitution can be found. */
8524 return error_mark_node
;
8525 else if (in_system_header_at (input_location
))
8526 /* Allow them in system headers because glibc uses them. */;
8528 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array %qD", name
);
8530 pedwarn (input_location
, OPT_Wpedantic
, "ISO C++ forbids zero-size array");
8533 else if (TREE_CONSTANT (size
)
8534 /* We don't allow VLAs at non-function scopes, or during
8535 tentative template substitution. */
8536 || !at_function_scope_p ()
8537 || !(complain
& tf_error
))
8539 if (!(complain
& tf_error
))
8540 return error_mark_node
;
8541 /* `(int) &fn' is not a valid array bound. */
8543 error ("size of array %qD is not an integral constant-expression",
8546 error ("size of array is not an integral constant-expression");
8547 size
= integer_one_node
;
8549 else if (pedantic
&& warn_vla
!= 0)
8552 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8554 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8556 else if (warn_vla
> 0)
8560 "variable length array %qD is used", name
);
8563 "variable length array is used");
8566 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8567 /* A variable sized array. */
8568 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8571 HOST_WIDE_INT saved_processing_template_decl
;
8573 /* Compute the index of the largest element in the array. It is
8574 one less than the number of elements in the array. We save
8575 and restore PROCESSING_TEMPLATE_DECL so that computations in
8576 cp_build_binary_op will be appropriately folded. */
8577 saved_processing_template_decl
= processing_template_decl
;
8578 processing_template_decl
= 0;
8579 itype
= cp_build_binary_op (input_location
,
8581 cp_convert (ssizetype
, size
, complain
),
8582 cp_convert (ssizetype
, integer_one_node
,
8585 itype
= fold (itype
);
8586 processing_template_decl
= saved_processing_template_decl
;
8588 if (!TREE_CONSTANT (itype
))
8590 /* A variable sized array. */
8591 itype
= variable_size (itype
);
8593 if (TREE_CODE (itype
) != SAVE_EXPR
)
8595 /* Look for SIZEOF_EXPRs in itype and fold them, otherwise
8596 they might survive till gimplification. */
8597 tree newitype
= itype
;
8599 cp_walk_tree_without_duplicates (&newitype
,
8600 fold_sizeof_expr_r
, &found
);
8602 itype
= variable_size (fold (newitype
));
8605 stabilize_vla_size (itype
);
8607 if (flag_sanitize
& SANITIZE_VLA
8608 && do_ubsan_in_current_function ())
8610 /* We have to add 1 -- in the ubsan routine we generate
8611 LE_EXPR rather than LT_EXPR. */
8612 tree t
= fold_build2 (PLUS_EXPR
, TREE_TYPE (itype
), itype
,
8613 build_one_cst (TREE_TYPE (itype
)));
8614 t
= ubsan_instrument_vla (input_location
, t
);
8615 finish_expr_stmt (t
);
8618 /* Make sure that there was no overflow when creating to a signed
8619 index type. (For example, on a 32-bit machine, an array with
8620 size 2^32 - 1 is too big.) */
8621 else if (TREE_CODE (itype
) == INTEGER_CST
8622 && TREE_OVERFLOW (itype
))
8624 if (!(complain
& tf_error
))
8625 return error_mark_node
;
8626 error ("overflow in array dimension");
8627 TREE_OVERFLOW (itype
) = 0;
8631 /* Create and return the appropriate index type. */
8632 itype
= build_index_type (itype
);
8634 /* If the index type were dependent, we would have returned early, so
8635 remember that it isn't. */
8636 TYPE_DEPENDENT_P (itype
) = 0;
8637 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8641 /* Returns the scope (if any) in which the entity declared by
8642 DECLARATOR will be located. If the entity was declared with an
8643 unqualified name, NULL_TREE is returned. */
8646 get_scope_of_declarator (const cp_declarator
*declarator
)
8648 while (declarator
&& declarator
->kind
!= cdk_id
)
8649 declarator
= declarator
->declarator
;
8651 /* If the declarator-id is a SCOPE_REF, the scope in which the
8652 declaration occurs is the first operand. */
8654 && declarator
->u
.id
.qualifying_scope
)
8655 return declarator
->u
.id
.qualifying_scope
;
8657 /* Otherwise, the declarator is not a qualified name; the entity will
8658 be declared in the current scope. */
8662 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8663 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8667 create_array_type_for_decl (tree name
, tree type
, tree size
)
8669 tree itype
= NULL_TREE
;
8671 /* If things have already gone awry, bail now. */
8672 if (type
== error_mark_node
|| size
== error_mark_node
)
8673 return error_mark_node
;
8675 /* 8.3.4/1: If the type of the identifier of D contains the auto
8676 type-specifier, the program is ill-formed. */
8677 if (type_uses_auto (type
))
8679 error ("%qD declared as array of %qT", name
, type
);
8680 return error_mark_node
;
8683 /* If there are some types which cannot be array elements,
8684 issue an error-message and return. */
8685 switch (TREE_CODE (type
))
8689 error ("declaration of %qD as array of void", name
);
8691 error ("creating array of void");
8692 return error_mark_node
;
8696 error ("declaration of %qD as array of functions", name
);
8698 error ("creating array of functions");
8699 return error_mark_node
;
8701 case REFERENCE_TYPE
:
8703 error ("declaration of %qD as array of references", name
);
8705 error ("creating array of references");
8706 return error_mark_node
;
8710 error ("declaration of %qD as array of function members", name
);
8712 error ("creating array of function members");
8713 return error_mark_node
;
8721 The constant expressions that specify the bounds of the arrays
8722 can be omitted only for the first member of the sequence. */
8723 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8726 error ("declaration of %qD as multidimensional array must "
8727 "have bounds for all dimensions except the first",
8730 error ("multidimensional array must have bounds for all "
8731 "dimensions except the first");
8733 return error_mark_node
;
8736 /* Figure out the index type for the array. */
8738 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8741 T is called the array element type; this type shall not be [...] an
8742 abstract class type. */
8743 abstract_virtuals_error (name
, type
);
8745 return build_cplus_array_type (type
, itype
);
8748 /* Check that it's OK to declare a function with the indicated TYPE.
8749 SFK indicates the kind of special function (if any) that this
8750 function is. OPTYPE is the type given in a conversion operator
8751 declaration, or the class type for a constructor/destructor.
8752 Returns the actual return type of the function; that
8753 may be different than TYPE if an error occurs, or for certain
8754 special functions. */
8757 check_special_function_return_type (special_function_kind sfk
,
8763 case sfk_constructor
:
8765 error ("return type specification for constructor invalid");
8767 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8768 type
= build_pointer_type (optype
);
8770 type
= void_type_node
;
8773 case sfk_destructor
:
8775 error ("return type specification for destructor invalid");
8776 /* We can't use the proper return type here because we run into
8777 problems with ambiguous bases and covariant returns.
8778 Java classes are left unchanged because (void *) isn't a valid
8779 Java type, and we don't want to change the Java ABI. */
8780 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8781 type
= build_pointer_type (void_type_node
);
8783 type
= void_type_node
;
8786 case sfk_conversion
:
8788 error ("return type specified for %<operator %T%>", optype
);
8799 /* A variable or data member (whose unqualified name is IDENTIFIER)
8800 has been declared with the indicated TYPE. If the TYPE is not
8801 acceptable, issue an error message and return a type to use for
8802 error-recovery purposes. */
8805 check_var_type (tree identifier
, tree type
)
8807 if (VOID_TYPE_P (type
))
8810 error ("unnamed variable or field declared void");
8811 else if (identifier_p (identifier
))
8813 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8814 error ("variable or field %qE declared void", identifier
);
8817 error ("variable or field declared void");
8818 type
= error_mark_node
;
8824 /* Given declspecs and a declarator (abstract or otherwise), determine
8825 the name and type of the object declared and construct a DECL node
8828 DECLSPECS points to the representation of declaration-specifier
8829 sequence that precedes declarator.
8831 DECL_CONTEXT says which syntactic context this declaration is in:
8832 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8833 FUNCDEF for a function definition. Like NORMAL but a few different
8834 error messages in each case. Return value may be zero meaning
8835 this definition is too screwy to try to parse.
8836 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8837 handle member functions (which have FIELD context).
8838 Return value may be zero meaning this definition is too screwy to
8840 PARM for a parameter declaration (either within a function prototype
8841 or before a function body). Make a PARM_DECL, or return void_type_node.
8842 TPARM for a template parameter declaration.
8843 CATCHPARM for a parameter declaration before a catch clause.
8844 TYPENAME if for a typename (in a cast or sizeof).
8845 Don't make a DECL node; just return the ..._TYPE node.
8846 FIELD for a struct or union field; make a FIELD_DECL.
8847 BITFIELD for a field with specified width.
8849 INITIALIZED is as for start_decl.
8851 ATTRLIST is a pointer to the list of attributes, which may be NULL
8852 if there are none; *ATTRLIST may be modified if attributes from inside
8853 the declarator should be applied to the declaration.
8855 When this function is called, scoping variables (such as
8856 CURRENT_CLASS_TYPE) should reflect the scope in which the
8857 declaration occurs, not the scope in which the new declaration will
8858 be placed. For example, on:
8862 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8865 Returns a DECL (if a declarator is present), a TYPE (if there is no
8866 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8870 grokdeclarator (const cp_declarator
*declarator
,
8871 cp_decl_specifier_seq
*declspecs
,
8872 enum decl_context decl_context
,
8876 tree type
= NULL_TREE
;
8878 int explicit_intN
= 0;
8879 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8880 int explicit_int
= 0;
8881 int explicit_char
= 0;
8882 int defaulted_int
= 0;
8884 tree typedef_decl
= NULL_TREE
;
8885 const char *name
= NULL
;
8886 tree typedef_type
= NULL_TREE
;
8887 /* True if this declarator is a function definition. */
8888 bool funcdef_flag
= false;
8889 cp_declarator_kind innermost_code
= cdk_error
;
8892 /* See the code below that used this. */
8893 tree decl_attr
= NULL_TREE
;
8896 /* Keep track of what sort of function is being processed
8897 so that we can warn about default return values, or explicit
8898 return values which do not match prescribed defaults. */
8899 special_function_kind sfk
= sfk_none
;
8901 tree dname
= NULL_TREE
;
8902 tree ctor_return_type
= NULL_TREE
;
8903 enum overload_flags flags
= NO_SPECIAL
;
8904 /* cv-qualifiers that apply to the declarator, for a declaration of
8905 a member function. */
8906 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8907 /* virt-specifiers that apply to the declarator, for a declaration of
8908 a member function. */
8909 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8910 /* ref-qualifier that applies to the declarator, for a declaration of
8911 a member function. */
8912 cp_ref_qualifier rqual
= REF_QUAL_NONE
;
8913 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8915 tree raises
= NULL_TREE
;
8916 int template_count
= 0;
8917 tree returned_attrs
= NULL_TREE
;
8918 tree parms
= NULL_TREE
;
8919 const cp_declarator
*id_declarator
;
8920 /* The unqualified name of the declarator; either an
8921 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8922 tree unqualified_id
;
8923 /* The class type, if any, in which this entity is located,
8924 or NULL_TREE if none. Note that this value may be different from
8925 the current class type; for example if an attempt is made to declare
8926 "A::f" inside "B", this value will be "A". */
8927 tree ctype
= current_class_type
;
8928 /* The NAMESPACE_DECL for the namespace in which this entity is
8929 located. If an unqualified name is used to declare the entity,
8930 this value will be NULL_TREE, even if the entity is located at
8932 tree in_namespace
= NULL_TREE
;
8933 cp_storage_class storage_class
;
8934 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8935 bool type_was_error_mark_node
= false;
8936 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8937 bool template_type_arg
= false;
8938 bool template_parm_flag
= false;
8939 bool typedef_p
= decl_spec_seq_has_spec_p (declspecs
, ds_typedef
);
8940 bool constexpr_p
= decl_spec_seq_has_spec_p (declspecs
, ds_constexpr
);
8941 bool late_return_type_p
= false;
8942 bool array_parameter_p
= false;
8943 source_location saved_loc
= input_location
;
8946 signed_p
= decl_spec_seq_has_spec_p (declspecs
, ds_signed
);
8947 unsigned_p
= decl_spec_seq_has_spec_p (declspecs
, ds_unsigned
);
8948 short_p
= decl_spec_seq_has_spec_p (declspecs
, ds_short
);
8949 long_p
= decl_spec_seq_has_spec_p (declspecs
, ds_long
);
8950 longlong
= decl_spec_seq_has_spec_p (declspecs
, ds_long_long
);
8951 explicit_intN
= declspecs
->explicit_intN_p
;
8952 thread_p
= decl_spec_seq_has_spec_p (declspecs
, ds_thread
);
8954 if (decl_context
== FUNCDEF
)
8955 funcdef_flag
= true, decl_context
= NORMAL
;
8956 else if (decl_context
== MEMFUNCDEF
)
8957 funcdef_flag
= true, decl_context
= FIELD
;
8958 else if (decl_context
== BITFIELD
)
8959 bitfield
= 1, decl_context
= FIELD
;
8960 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8961 template_type_arg
= true, decl_context
= TYPENAME
;
8962 else if (decl_context
== TPARM
)
8963 template_parm_flag
= true, decl_context
= PARM
;
8965 if (initialized
> 1)
8966 funcdef_flag
= true;
8968 /* Look inside a declarator for the name being declared
8969 and get it as a string, for an error message. */
8970 for (id_declarator
= declarator
;
8972 id_declarator
= id_declarator
->declarator
)
8974 if (id_declarator
->kind
!= cdk_id
)
8975 innermost_code
= id_declarator
->kind
;
8977 switch (id_declarator
->kind
)
8980 if (id_declarator
->declarator
8981 && id_declarator
->declarator
->kind
== cdk_id
)
8983 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8984 if (sfk
== sfk_destructor
)
8991 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8992 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8995 if (qualifying_scope
)
8997 if (at_function_scope_p ())
9001 A declarator-id shall not be qualified except
9004 None of the cases are permitted in block
9006 if (qualifying_scope
== global_namespace
)
9007 error ("invalid use of qualified-name %<::%D%>",
9009 else if (TYPE_P (qualifying_scope
))
9010 error ("invalid use of qualified-name %<%T::%D%>",
9011 qualifying_scope
, decl
);
9013 error ("invalid use of qualified-name %<%D::%D%>",
9014 qualifying_scope
, decl
);
9015 return error_mark_node
;
9017 else if (TYPE_P (qualifying_scope
))
9019 ctype
= qualifying_scope
;
9020 if (!MAYBE_CLASS_TYPE_P (ctype
))
9022 error ("%q#T is not a class or a namespace", ctype
);
9025 else if (innermost_code
!= cdk_function
9026 && current_class_type
9027 && !uniquely_derived_from_p (ctype
,
9028 current_class_type
))
9030 error ("invalid use of qualified-name %<%T::%D%>",
9031 qualifying_scope
, decl
);
9032 return error_mark_node
;
9035 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
9036 in_namespace
= qualifying_scope
;
9038 switch (TREE_CODE (decl
))
9044 if (innermost_code
!= cdk_function
)
9046 error ("declaration of %qD as non-function", decl
);
9047 return error_mark_node
;
9049 else if (!qualifying_scope
9050 && !(current_class_type
&& at_class_scope_p ()))
9052 error ("declaration of %qD as non-member", decl
);
9053 return error_mark_node
;
9056 type
= TREE_OPERAND (decl
, 0);
9058 type
= constructor_name (type
);
9059 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
9064 case TEMPLATE_ID_EXPR
:
9066 tree fns
= TREE_OPERAND (decl
, 0);
9069 if (!identifier_p (dname
))
9071 if (variable_template_p (dname
))
9072 dname
= DECL_NAME (dname
);
9075 gcc_assert (is_overloaded_fn (dname
));
9076 dname
= DECL_NAME (get_first_fn (dname
));
9082 case IDENTIFIER_NODE
:
9083 if (identifier_p (decl
))
9086 if (C_IS_RESERVED_WORD (dname
))
9088 error ("declarator-id missing; using reserved word %qD",
9090 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9092 else if (!IDENTIFIER_TYPENAME_P (dname
))
9093 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9096 gcc_assert (flags
== NO_SPECIAL
);
9097 flags
= TYPENAME_FLAG
;
9098 ctor_return_type
= TREE_TYPE (dname
);
9099 sfk
= sfk_conversion
;
9100 if (is_typename_at_global_scope (dname
))
9101 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
9103 name
= "<invalid operator>";
9120 return error_mark_node
;
9125 if (id_declarator
->kind
== cdk_id
)
9131 The declarator in a function-definition shall have the form
9132 D1 ( parameter-declaration-clause) ... */
9133 if (funcdef_flag
&& innermost_code
!= cdk_function
)
9135 error ("function definition does not declare parameters");
9136 return error_mark_node
;
9139 if (flags
== TYPENAME_FLAG
9140 && innermost_code
!= cdk_function
9141 && ! (ctype
&& !declspecs
->any_specifiers_p
))
9143 error ("declaration of %qD as non-function", dname
);
9144 return error_mark_node
;
9148 && identifier_p (dname
)
9149 && UDLIT_OPER_P (dname
)
9150 && innermost_code
!= cdk_function
)
9152 error ("declaration of %qD as non-function", dname
);
9153 return error_mark_node
;
9156 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
9160 error ("declaration of %qD as %<typedef%>", dname
);
9161 return error_mark_node
;
9163 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9165 error ("declaration of %qD as parameter", dname
);
9166 return error_mark_node
;
9170 /* Anything declared one level down from the top level
9171 must be one of the parameters of a function
9172 (because the body is at least two levels down). */
9174 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9175 by not allowing C++ class definitions to specify their parameters
9176 with xdecls (must be spec.d in the parmlist).
9178 Since we now wait to push a class scope until we are sure that
9179 we are in a legitimate method context, we must set oldcname
9180 explicitly (since current_class_name is not yet alive).
9182 We also want to avoid calling this a PARM if it is in a namespace. */
9184 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9186 cp_binding_level
*b
= current_binding_level
;
9187 current_binding_level
= b
->level_chain
;
9188 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9189 decl_context
= PARM
;
9190 current_binding_level
= b
;
9194 name
= decl_context
== PARM
? "parameter" : "type name";
9196 if (constexpr_p
&& typedef_p
)
9198 error ("%<constexpr%> cannot appear in a typedef declaration");
9199 return error_mark_node
;
9202 /* If there were multiple types specified in the decl-specifier-seq,
9203 issue an error message. */
9204 if (declspecs
->multiple_types_p
)
9206 error ("two or more data types in declaration of %qs", name
);
9207 return error_mark_node
;
9210 if (declspecs
->conflicting_specifiers_p
)
9212 error ("conflicting specifiers in declaration of %qs", name
);
9213 return error_mark_node
;
9216 /* Extract the basic type from the decl-specifier-seq. */
9217 type
= declspecs
->type
;
9218 if (type
== error_mark_node
)
9221 type_was_error_mark_node
= true;
9223 /* If the entire declaration is itself tagged as deprecated then
9224 suppress reports of deprecated items. */
9225 if (type
&& TREE_DEPRECATED (type
)
9226 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9227 warn_deprecated_use (type
, NULL_TREE
);
9228 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
9230 typedef_decl
= type
;
9231 type
= TREE_TYPE (typedef_decl
);
9232 if (TREE_DEPRECATED (type
)
9233 && DECL_ARTIFICIAL (typedef_decl
)
9234 && deprecated_state
!= DEPRECATED_SUPPRESS
)
9235 warn_deprecated_use (type
, NULL_TREE
);
9237 /* No type at all: default to `int', and set DEFAULTED_INT
9238 because it was not a user-defined typedef. */
9239 if (type
== NULL_TREE
)
9241 if (signed_p
|| unsigned_p
|| long_p
|| short_p
)
9243 /* These imply 'int'. */
9244 type
= integer_type_node
;
9247 /* If we just have "complex", it is equivalent to "complex double". */
9248 else if (!longlong
&& !explicit_intN
9249 && decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9251 type
= double_type_node
;
9252 pedwarn (declspecs
->locations
[ds_complex
], OPT_Wpedantic
,
9253 "ISO C++ does not support plain %<complex%> meaning "
9254 "%<double complex%>");
9258 explicit_int
= declspecs
->explicit_int_p
;
9259 explicit_char
= declspecs
->explicit_char_p
;
9262 /* See the code below that used this. */
9264 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
9266 typedef_type
= type
;
9269 if (sfk
!= sfk_conversion
)
9270 ctor_return_type
= ctype
;
9272 if (sfk
!= sfk_none
)
9273 type
= check_special_function_return_type (sfk
, type
,
9275 else if (type
== NULL_TREE
)
9281 /* We handle `main' specially here, because 'main () { }' is so
9282 common. With no options, it is allowed. With -Wreturn-type,
9283 it is a warning. It is only an error with -pedantic-errors. */
9284 is_main
= (funcdef_flag
9285 && dname
&& identifier_p (dname
)
9286 && MAIN_NAME_P (dname
)
9287 && ctype
== NULL_TREE
9288 && in_namespace
== NULL_TREE
9289 && current_namespace
== global_namespace
);
9291 if (type_was_error_mark_node
)
9292 /* We've already issued an error, don't complain more. */;
9293 else if (in_system_header_at (input_location
) || flag_ms_extensions
)
9294 /* Allow it, sigh. */;
9296 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
9298 pedwarn (input_location
, OPT_Wpedantic
,
9299 "ISO C++ forbids declaration of %qs with no type", name
);
9301 warning (OPT_Wreturn_type
,
9302 "ISO C++ forbids declaration of %qs with no type", name
);
9304 type
= integer_type_node
;
9311 if (! int_n_enabled_p
[declspecs
->int_n_idx
])
9313 error ("%<__int%d%> is not supported by this target",
9314 int_n_data
[declspecs
->int_n_idx
].bitsize
);
9315 explicit_intN
= false;
9317 else if (pedantic
&& ! in_system_header_at (input_location
))
9318 pedwarn (input_location
, OPT_Wpedantic
,
9319 "ISO C++ does not support %<__int%d%> for %qs",
9320 int_n_data
[declspecs
->int_n_idx
].bitsize
, name
);
9323 /* Now process the modifiers that were specified
9324 and check for invalid combinations. */
9326 /* Long double is a special combination. */
9327 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
9330 type
= cp_build_qualified_type (long_double_type_node
,
9331 cp_type_quals (type
));
9334 /* Check all other uses of type modifiers. */
9336 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
9340 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9341 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9342 else if (signed_p
&& unsigned_p
)
9343 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
9344 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
9345 error ("%<long long%> invalid for %qs", name
);
9346 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
9347 error ("%<long%> invalid for %qs", name
);
9348 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
9349 error ("%<short%> invalid for %qs", name
);
9350 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
9351 error ("%<long%> or %<short%> invalid for %qs", name
);
9352 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_intN
)
9353 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
9354 else if ((long_p
|| short_p
) && explicit_char
)
9355 error ("%<long%> or %<short%> specified with char for %qs", name
);
9356 else if (long_p
&& short_p
)
9357 error ("%<long%> and %<short%> specified together for %qs", name
);
9358 else if (type
== char16_type_node
|| type
== char32_type_node
)
9360 if (signed_p
|| unsigned_p
)
9361 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
9362 else if (short_p
|| long_p
)
9363 error ("%<short%> or %<long%> invalid for %qs", name
);
9368 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_intN
&& pedantic
)
9370 pedwarn (input_location
, OPT_Wpedantic
,
9371 "long, short, signed or unsigned used invalidly for %qs",
9373 if (flag_pedantic_errors
)
9378 /* Discard the type modifiers if they are invalid. */
9389 /* Decide whether an integer type is signed or not.
9390 Optionally treat bitfields as signed by default. */
9394 It is implementation-defined whether a plain (neither
9395 explicitly signed or unsigned) char, short, int, or long
9396 bit-field is signed or unsigned.
9398 Naturally, we extend this to long long as well. Note that
9399 this does not include wchar_t. */
9400 || (bitfield
&& !flag_signed_bitfields
9402 /* A typedef for plain `int' without `signed' can be
9403 controlled just like plain `int', but a typedef for
9404 `signed int' cannot be so controlled. */
9406 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9407 && TREE_CODE (type
) == INTEGER_TYPE
9408 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9411 type
= int_n_trees
[declspecs
->int_n_idx
].unsigned_type
;
9413 type
= long_long_unsigned_type_node
;
9415 type
= long_unsigned_type_node
;
9417 type
= short_unsigned_type_node
;
9418 else if (type
== char_type_node
)
9419 type
= unsigned_char_type_node
;
9420 else if (typedef_decl
)
9421 type
= unsigned_type_for (type
);
9423 type
= unsigned_type_node
;
9425 else if (signed_p
&& type
== char_type_node
)
9426 type
= signed_char_type_node
;
9427 else if (explicit_intN
)
9428 type
= int_n_trees
[declspecs
->int_n_idx
].signed_type
;
9430 type
= long_long_integer_type_node
;
9432 type
= long_integer_type_node
;
9434 type
= short_integer_type_node
;
9436 if (decl_spec_seq_has_spec_p (declspecs
, ds_complex
))
9438 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9439 error ("complex invalid for %qs", name
);
9440 /* If a modifier is specified, the resulting complex is the complex
9441 form of TYPE. E.g, "complex short" is "complex short int". */
9442 else if (type
== integer_type_node
)
9443 type
= complex_integer_type_node
;
9444 else if (type
== float_type_node
)
9445 type
= complex_float_type_node
;
9446 else if (type
== double_type_node
)
9447 type
= complex_double_type_node
;
9448 else if (type
== long_double_type_node
)
9449 type
= complex_long_double_type_node
;
9451 type
= build_complex_type (type
);
9454 type_quals
= TYPE_UNQUALIFIED
;
9455 if (decl_spec_seq_has_spec_p (declspecs
, ds_const
))
9456 type_quals
|= TYPE_QUAL_CONST
;
9457 if (decl_spec_seq_has_spec_p (declspecs
, ds_volatile
))
9458 type_quals
|= TYPE_QUAL_VOLATILE
;
9459 if (decl_spec_seq_has_spec_p (declspecs
, ds_restrict
))
9460 type_quals
|= TYPE_QUAL_RESTRICT
;
9461 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
9462 error ("qualifiers are not allowed on declaration of %<operator %T%>",
9465 /* If we're using the injected-class-name to form a compound type or a
9466 declaration, replace it with the underlying class so we don't get
9467 redundant typedefs in the debug output. But if we are returning the
9468 type unchanged, leave it alone so that it's available to
9469 maybe_get_template_decl_from_type_decl. */
9470 if (CLASS_TYPE_P (type
)
9471 && DECL_SELF_REFERENCE_P (TYPE_NAME (type
))
9472 && type
== TREE_TYPE (TYPE_NAME (type
))
9473 && (declarator
|| type_quals
))
9474 type
= DECL_ORIGINAL_TYPE (TYPE_NAME (type
));
9476 type_quals
|= cp_type_quals (type
);
9477 type
= cp_build_qualified_type_real
9478 (type
, type_quals
, ((((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
))
9479 || declspecs
->decltype_p
)
9480 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
9481 /* We might have ignored or rejected some of the qualifiers. */
9482 type_quals
= cp_type_quals (type
);
9485 inlinep
= decl_spec_seq_has_spec_p (declspecs
, ds_inline
);
9486 virtualp
= decl_spec_seq_has_spec_p (declspecs
, ds_virtual
);
9487 explicitp
= decl_spec_seq_has_spec_p (declspecs
, ds_explicit
);
9489 storage_class
= declspecs
->storage_class
;
9490 if (storage_class
== sc_static
)
9491 staticp
= 1 + (decl_context
== FIELD
);
9493 if (virtualp
&& staticp
== 2)
9495 error ("member %qD cannot be declared both virtual and static", dname
);
9496 storage_class
= sc_none
;
9499 friendp
= decl_spec_seq_has_spec_p (declspecs
, ds_friend
);
9501 /* Issue errors about use of storage classes for parameters. */
9502 if (decl_context
== PARM
)
9506 error ("typedef declaration invalid in parameter declaration");
9507 return error_mark_node
;
9509 else if (template_parm_flag
&& storage_class
!= sc_none
)
9511 error ("storage class specified for template parameter %qs", name
);
9512 return error_mark_node
;
9514 else if (storage_class
== sc_static
9515 || storage_class
== sc_extern
9517 error ("storage class specifiers invalid in parameter declarations");
9519 /* Function parameters cannot be constexpr. If we saw one, moan
9520 and pretend it wasn't there. */
9523 error ("a parameter cannot be declared %<constexpr%>");
9528 /* Give error if `virtual' is used outside of class declaration. */
9530 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9532 error ("%<virtual%> outside class declaration");
9536 /* Static anonymous unions are dealt with here. */
9537 if (staticp
&& decl_context
== TYPENAME
9539 && ANON_AGGR_TYPE_P (declspecs
->type
))
9540 decl_context
= FIELD
;
9542 /* Warn about storage classes that are invalid for certain
9543 kinds of declarations (parameters, typenames, etc.). */
9546 && storage_class
!= sc_extern
9547 && storage_class
!= sc_static
)
9550 error ("multiple storage classes in declaration of %qs", name
);
9553 if (decl_context
!= NORMAL
9554 && ((storage_class
!= sc_none
9555 && storage_class
!= sc_mutable
)
9558 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9559 && (storage_class
== sc_register
9560 || storage_class
== sc_auto
))
9564 else if (decl_context
== FIELD
9565 /* C++ allows static class elements. */
9566 && storage_class
== sc_static
)
9567 /* C++ also allows inlines and signed and unsigned elements,
9568 but in those cases we don't come in here. */
9572 if (decl_context
== FIELD
)
9573 error ("storage class specified for %qs", name
);
9576 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9577 error ("storage class specified for parameter %qs", name
);
9579 error ("storage class specified for typename");
9581 if (storage_class
== sc_register
9582 || storage_class
== sc_auto
9583 || storage_class
== sc_extern
9585 storage_class
= sc_none
;
9588 else if (storage_class
== sc_extern
&& funcdef_flag
9589 && ! toplevel_bindings_p ())
9590 error ("nested function %qs declared %<extern%>", name
);
9591 else if (toplevel_bindings_p ())
9593 if (storage_class
== sc_auto
)
9594 error ("top-level declaration of %qs specifies %<auto%>", name
);
9597 && storage_class
!= sc_extern
9598 && storage_class
!= sc_static
)
9600 if (declspecs
->gnu_thread_keyword_p
)
9601 pedwarn (input_location
, 0, "function-scope %qs implicitly auto and "
9602 "declared %<__thread%>", name
);
9604 /* When thread_local is applied to a variable of block scope the
9605 storage-class-specifier static is implied if it does not appear
9607 storage_class
= declspecs
->storage_class
= sc_static
;
9611 if (storage_class
&& friendp
)
9613 error ("storage class specifiers invalid in friend function declarations");
9614 storage_class
= sc_none
;
9619 unqualified_id
= NULL_TREE
;
9622 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9623 switch (TREE_CODE (unqualified_id
))
9626 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9627 if (TYPE_P (unqualified_id
))
9628 unqualified_id
= constructor_name (unqualified_id
);
9631 case IDENTIFIER_NODE
:
9632 case TEMPLATE_ID_EXPR
:
9640 if (declspecs
->std_attributes
)
9642 /* Apply the c++11 attributes to the type preceding them. */
9643 input_location
= declspecs
->locations
[ds_std_attribute
];
9644 decl_attributes (&type
, declspecs
->std_attributes
, 0);
9645 input_location
= saved_loc
;
9648 /* Determine the type of the entity declared by recurring on the
9650 for (; declarator
; declarator
= declarator
->declarator
)
9652 const cp_declarator
*inner_declarator
;
9655 if (type
== error_mark_node
)
9656 return error_mark_node
;
9658 attrs
= declarator
->attributes
;
9664 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9665 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9666 if (declarator
->kind
== cdk_function
)
9667 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9668 if (declarator
->kind
== cdk_array
)
9669 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9670 returned_attrs
= decl_attributes (&type
,
9671 chainon (returned_attrs
, attrs
),
9675 if (declarator
->kind
== cdk_id
)
9678 inner_declarator
= declarator
->declarator
;
9680 switch (declarator
->kind
)
9683 type
= create_array_type_for_decl (dname
, type
,
9684 declarator
->u
.array
.bounds
);
9685 if (declarator
->std_attributes
)
9688 The optional attribute-specifier-seq appertains to the
9690 returned_attrs
= chainon (returned_attrs
,
9691 declarator
->std_attributes
);
9699 /* Declaring a function type.
9700 Make sure we have a valid type for the function to return. */
9702 if (type_quals
!= TYPE_UNQUALIFIED
)
9704 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9705 warning (OPT_Wignored_qualifiers
,
9706 "type qualifiers ignored on function return type");
9707 /* We now know that the TYPE_QUALS don't apply to the
9708 decl, but to its return type. */
9709 type_quals
= TYPE_UNQUALIFIED
;
9711 errmsg
= targetm
.invalid_return_type (type
);
9715 type
= integer_type_node
;
9718 /* Error about some types functions can't return. */
9720 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9722 error ("%qs declared as function returning a function", name
);
9723 return error_mark_node
;
9725 if (TREE_CODE (type
) == ARRAY_TYPE
)
9727 error ("%qs declared as function returning an array", name
);
9728 return error_mark_node
;
9731 input_location
= declspecs
->locations
[ds_type_spec
];
9732 abstract_virtuals_error (ACU_RETURN
, type
);
9733 input_location
= saved_loc
;
9735 /* Pick up type qualifiers which should be applied to `this'. */
9736 memfn_quals
= declarator
->u
.function
.qualifiers
;
9737 /* Pick up virt-specifiers. */
9738 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9739 /* And ref-qualifier, too */
9740 rqual
= declarator
->u
.function
.ref_qualifier
;
9741 /* Pick up the exception specifications. */
9742 raises
= declarator
->u
.function
.exception_specification
;
9743 /* If the exception-specification is ill-formed, let's pretend
9744 there wasn't one. */
9745 if (raises
== error_mark_node
)
9748 /* Say it's a definition only for the CALL_EXPR
9749 closest to the identifier. */
9750 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9752 /* Handle a late-specified return type. */
9755 if (type_uses_auto (type
))
9757 if (!declarator
->u
.function
.late_return_type
)
9759 if (current_class_type
9760 && LAMBDA_TYPE_P (current_class_type
))
9761 /* OK for C++11 lambdas. */;
9762 else if (cxx_dialect
< cxx14
)
9764 error ("%qs function uses "
9765 "%<auto%> type specifier without trailing "
9766 "return type", name
);
9767 inform (input_location
, "deduced return type "
9768 "only available with -std=c++14 or "
9773 error ("virtual function cannot "
9774 "have deduced return type");
9778 else if (!is_auto (type
) && sfk
!= sfk_conversion
)
9780 error ("%qs function with trailing return type has"
9781 " %qT as its type rather than plain %<auto%>",
9783 return error_mark_node
;
9786 else if (declarator
->u
.function
.late_return_type
9787 && sfk
!= sfk_conversion
)
9789 if (cxx_dialect
< cxx11
)
9790 /* Not using maybe_warn_cpp0x because this should
9791 always be an error. */
9792 error ("trailing return type only available with "
9793 "-std=c++11 or -std=gnu++11");
9795 error ("%qs function with trailing return type not "
9796 "declared with %<auto%> type specifier", name
);
9797 return error_mark_node
;
9800 type
= splice_late_return_type
9801 (type
, declarator
->u
.function
.late_return_type
);
9802 if (type
== error_mark_node
)
9803 return error_mark_node
;
9805 if (declarator
->u
.function
.late_return_type
)
9806 late_return_type_p
= true;
9808 if (ctype
== NULL_TREE
9809 && decl_context
== FIELD
9812 ctype
= current_class_type
;
9814 if (ctype
&& (sfk
== sfk_constructor
9815 || sfk
== sfk_destructor
))
9817 /* We are within a class's scope. If our declarator name
9818 is the same as the class name, and we are defining
9819 a function, then it is a constructor/destructor, and
9820 therefore returns a void type. */
9822 /* ISO C++ 12.4/2. A destructor may not be declared
9823 const or volatile. A destructor may not be static.
9824 A destructor may not be declared with ref-qualifier.
9826 ISO C++ 12.1. A constructor may not be declared
9827 const or volatile. A constructor may not be
9828 virtual. A constructor may not be static.
9829 A constructor may not be declared with ref-qualifier. */
9831 error ((flags
== DTOR_FLAG
)
9832 ? G_("destructor cannot be static member function")
9833 : G_("constructor cannot be static member function"));
9836 error ((flags
== DTOR_FLAG
)
9837 ? G_("destructors may not be cv-qualified")
9838 : G_("constructors may not be cv-qualified"));
9839 memfn_quals
= TYPE_UNQUALIFIED
;
9844 maybe_warn_cpp0x (CPP0X_REF_QUALIFIER
);
9845 error ((flags
== DTOR_FLAG
)
9846 ? "destructors may not be ref-qualified"
9847 : "constructors may not be ref-qualified");
9848 rqual
= REF_QUAL_NONE
;
9851 if (decl_context
== FIELD
9852 && !member_function_or_else (ctype
,
9855 return error_mark_node
;
9857 if (flags
!= DTOR_FLAG
)
9859 /* It's a constructor. */
9864 permerror (input_location
, "constructors cannot be declared virtual");
9867 if (decl_context
== FIELD
9868 && sfk
!= sfk_constructor
)
9869 return error_mark_node
;
9871 if (decl_context
== FIELD
)
9878 /* Cannot be both friend and virtual. */
9879 error ("virtual functions cannot be friends");
9882 if (decl_context
== NORMAL
)
9883 error ("friend declaration not in class definition");
9884 if (current_function_decl
&& funcdef_flag
)
9885 error ("can%'t define friend function %qs in a local "
9889 else if (ctype
&& sfk
== sfk_conversion
)
9893 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9896 if (late_return_type_p
)
9897 error ("a conversion function cannot have a trailing return type");
9900 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9903 if (inner_declarator
9904 && inner_declarator
->kind
== cdk_id
9905 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9906 && arg_types
!= void_list_node
)
9908 error ("destructors may not have parameters");
9909 arg_types
= void_list_node
;
9913 type
= build_function_type (type
, arg_types
);
9914 if (declarator
->std_attributes
)
9917 The optional attribute-specifier-seq appertains to
9918 the function type. */
9919 decl_attributes (&type
, declarator
->std_attributes
,
9927 /* Filter out pointers-to-references and references-to-references.
9928 We can get these if a TYPE_DECL is used. */
9930 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9932 if (declarator
->kind
!= cdk_reference
)
9934 error ("cannot declare pointer to %q#T", type
);
9935 type
= TREE_TYPE (type
);
9938 /* In C++0x, we allow reference to reference declarations
9939 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9940 and template type arguments [14.3.1/4 temp.arg.type]. The
9941 check for direct reference to reference declarations, which
9942 are still forbidden, occurs below. Reasoning behind the change
9943 can be found in DR106, DR540, and the rvalue reference
9945 else if (cxx_dialect
== cxx98
)
9947 error ("cannot declare reference to %q#T", type
);
9948 type
= TREE_TYPE (type
);
9951 else if (VOID_TYPE_P (type
))
9953 if (declarator
->kind
== cdk_reference
)
9954 error ("cannot declare reference to %q#T", type
);
9955 else if (declarator
->kind
== cdk_ptrmem
)
9956 error ("cannot declare pointer to %q#T member", type
);
9959 /* We now know that the TYPE_QUALS don't apply to the decl,
9960 but to the target of the pointer. */
9961 type_quals
= TYPE_UNQUALIFIED
;
9963 /* This code used to handle METHOD_TYPE, but I don't think it's
9964 possible to get it here anymore. */
9965 gcc_assert (TREE_CODE (type
) != METHOD_TYPE
);
9966 if (declarator
->kind
== cdk_ptrmem
9967 && TREE_CODE (type
) == FUNCTION_TYPE
)
9969 memfn_quals
|= type_memfn_quals (type
);
9970 type
= build_memfn_type (type
,
9971 declarator
->u
.pointer
.class_type
,
9974 if (type
== error_mark_node
)
9975 return error_mark_node
;
9977 rqual
= REF_QUAL_NONE
;
9978 memfn_quals
= TYPE_UNQUALIFIED
;
9981 if (TREE_CODE (type
) == FUNCTION_TYPE
9982 && (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9983 || type_memfn_rqual (type
) != REF_QUAL_NONE
))
9984 error (declarator
->kind
== cdk_reference
9985 ? G_("cannot declare reference to qualified function type %qT")
9986 : G_("cannot declare pointer to qualified function type %qT"),
9989 /* When the pointed-to type involves components of variable size,
9990 care must be taken to ensure that the size evaluation code is
9991 emitted early enough to dominate all the possible later uses
9992 and late enough for the variables on which it depends to have
9995 This is expected to happen automatically when the pointed-to
9996 type has a name/declaration of it's own, but special attention
9997 is required if the type is anonymous.
9999 We handle the NORMAL and FIELD contexts here by inserting a
10000 dummy statement that just evaluates the size at a safe point
10001 and ensures it is not deferred until e.g. within a deeper
10002 conditional context (c++/43555).
10004 We expect nothing to be needed here for PARM or TYPENAME.
10005 Evaluating the size at this point for TYPENAME would
10006 actually be incorrect, as we might be in the middle of an
10007 expression with side effects on the pointed-to type size
10008 "arguments" prior to the pointer declaration point and the
10009 size evaluation could end up prior to the side effects. */
10011 if (!TYPE_NAME (type
)
10012 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
10013 && at_function_scope_p ()
10014 && variably_modified_type_p (type
, NULL_TREE
))
10015 /* Force evaluation of the SAVE_EXPR. */
10016 finish_expr_stmt (TYPE_SIZE (type
));
10018 if (declarator
->kind
== cdk_reference
)
10020 /* In C++0x, the type we are creating a reference to might be
10021 a typedef which is itself a reference type. In that case,
10022 we follow the reference collapsing rules in
10023 [7.1.3/8 dcl.typedef] to create the final reference type:
10025 "If a typedef TD names a type that is a reference to a type
10026 T, an attempt to create the type 'lvalue reference to cv TD'
10027 creates the type 'lvalue reference to T,' while an attempt
10028 to create the type "rvalue reference to cv TD' creates the
10031 if (VOID_TYPE_P (type
))
10032 /* We already gave an error. */;
10033 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10035 if (declarator
->u
.reference
.rvalue_ref
)
10036 /* Leave type alone. */;
10038 type
= cp_build_reference_type (TREE_TYPE (type
), false);
10041 type
= cp_build_reference_type
10042 (type
, declarator
->u
.reference
.rvalue_ref
);
10044 /* In C++0x, we need this check for direct reference to
10045 reference declarations, which are forbidden by
10046 [8.3.2/5 dcl.ref]. Reference to reference declarations
10047 are only allowed indirectly through typedefs and template
10048 type arguments. Example:
10050 void foo(int & &); // invalid ref-to-ref decl
10052 typedef int & int_ref;
10053 void foo(int_ref &); // valid ref-to-ref decl
10055 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
10056 error ("cannot declare reference to %q#T, which is not "
10057 "a typedef or a template type argument", type
);
10059 else if (TREE_CODE (type
) == METHOD_TYPE
)
10060 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10061 else if (declarator
->kind
== cdk_ptrmem
)
10063 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
10064 != NAMESPACE_DECL
);
10065 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
10066 /* We will already have complained. */
10067 type
= error_mark_node
;
10069 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
10073 type
= build_pointer_type (type
);
10075 /* Process a list of type modifier keywords (such as
10076 const or volatile) that were given inside the `*' or `&'. */
10078 if (declarator
->u
.pointer
.qualifiers
)
10081 = cp_build_qualified_type (type
,
10082 declarator
->u
.pointer
.qualifiers
);
10083 type_quals
= cp_type_quals (type
);
10086 /* Apply C++11 attributes to the pointer, and not to the
10087 type pointed to. This is unlike what is done for GNU
10088 attributes above. It is to comply with [dcl.ptr]/1:
10090 [the optional attribute-specifier-seq (7.6.1) appertains
10091 to the pointer and not to the object pointed to]. */
10092 if (declarator
->std_attributes
)
10093 decl_attributes (&type
, declarator
->std_attributes
,
10103 gcc_unreachable ();
10107 /* A `constexpr' specifier used in an object declaration declares
10108 the object as `const'. */
10109 if (constexpr_p
&& innermost_code
!= cdk_function
)
10111 /* DR1688 says that a `constexpr' specifier in combination with
10112 `volatile' is valid. */
10114 if (TREE_CODE (type
) != REFERENCE_TYPE
)
10116 type_quals
|= TYPE_QUAL_CONST
;
10117 type
= cp_build_qualified_type (type
, type_quals
);
10121 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
10122 && TREE_CODE (type
) != FUNCTION_TYPE
10123 && TREE_CODE (type
) != METHOD_TYPE
10124 && !variable_template_p (TREE_OPERAND (unqualified_id
, 0)))
10126 error ("template-id %qD used as a declarator",
10128 unqualified_id
= dname
;
10131 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
10132 qualified with a class-name, turn it into a METHOD_TYPE, unless
10133 we know that the function is static. We take advantage of this
10134 opportunity to do other processing that pertains to entities
10135 explicitly declared to be class members. Note that if DECLARATOR
10136 is non-NULL, we know it is a cdk_id declarator; otherwise, we
10137 would not have exited the loop above. */
10139 && declarator
->u
.id
.qualifying_scope
10140 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
10142 ctype
= declarator
->u
.id
.qualifying_scope
;
10143 ctype
= TYPE_MAIN_VARIANT (ctype
);
10144 template_count
= num_template_headers_for_class (ctype
);
10146 if (ctype
== current_class_type
)
10150 permerror (input_location
, "member functions are implicitly friends of their class");
10154 permerror (declarator
->id_loc
,
10155 "extra qualification %<%T::%> on member %qs",
10158 else if (/* If the qualifying type is already complete, then we
10159 can skip the following checks. */
10160 !COMPLETE_TYPE_P (ctype
)
10161 && (/* If the function is being defined, then
10162 qualifying type must certainly be complete. */
10164 /* A friend declaration of "T::f" is OK, even if
10165 "T" is a template parameter. But, if this
10166 function is not a friend, the qualifying type
10167 must be a class. */
10168 || (!friendp
&& !CLASS_TYPE_P (ctype
))
10169 /* For a declaration, the type need not be
10170 complete, if either it is dependent (since there
10171 is no meaningful definition of complete in that
10172 case) or the qualifying class is currently being
10174 || !(dependent_type_p (ctype
)
10175 || currently_open_class (ctype
)))
10176 /* Check that the qualifying type is complete. */
10177 && !complete_type_or_else (ctype
, NULL_TREE
))
10178 return error_mark_node
;
10179 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10181 if (current_class_type
10182 && (!friendp
|| funcdef_flag
))
10184 error (funcdef_flag
10185 ? G_("cannot define member function %<%T::%s%> "
10187 : G_("cannot declare member function %<%T::%s%> "
10189 ctype
, name
, current_class_type
);
10190 return error_mark_node
;
10193 else if (typedef_p
&& current_class_type
)
10195 error ("cannot declare member %<%T::%s%> within %qT",
10196 ctype
, name
, current_class_type
);
10197 return error_mark_node
;
10201 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
10202 ctype
= current_class_type
;
10204 /* Now TYPE has the actual type. */
10206 if (returned_attrs
)
10209 *attrlist
= chainon (returned_attrs
, *attrlist
);
10211 attrlist
= &returned_attrs
;
10215 && declarator
->kind
== cdk_id
10216 && declarator
->std_attributes
)
10217 /* [dcl.meaning]/1: The optional attribute-specifier-seq following
10218 a declarator-id appertains to the entity that is declared. */
10219 *attrlist
= chainon (*attrlist
, declarator
->std_attributes
);
10221 /* Handle parameter packs. */
10222 if (parameter_pack_p
)
10224 if (decl_context
== PARM
)
10225 /* Turn the type into a pack expansion.*/
10226 type
= make_pack_expansion (type
);
10228 error ("non-parameter %qs cannot be a parameter pack", name
);
10231 /* Did array size calculations overflow or does the array cover more
10232 than half of the address-space? */
10233 if (TREE_CODE (type
) == ARRAY_TYPE
10234 && COMPLETE_TYPE_P (type
)
10235 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
10236 && ! valid_constant_size_p (TYPE_SIZE_UNIT (type
)))
10238 error ("size of array %qs is too large", name
);
10239 /* If we proceed with the array type as it is, we'll eventually
10240 crash in tree_to_[su]hwi(). */
10241 type
= error_mark_node
;
10244 if ((decl_context
== FIELD
|| decl_context
== PARM
)
10245 && !processing_template_decl
10246 && variably_modified_type_p (type
, NULL_TREE
))
10248 if (decl_context
== FIELD
)
10249 error ("data member may not have variably modified type %qT", type
);
10251 error ("parameter may not have variably modified type %qT", type
);
10252 type
= error_mark_node
;
10255 if (explicitp
== 1 || (explicitp
&& friendp
))
10257 /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
10258 in the declaration of a constructor or conversion function within
10259 a class definition. */
10260 if (!current_class_type
)
10261 error_at (declspecs
->locations
[ds_explicit
],
10262 "%<explicit%> outside class declaration");
10264 error_at (declspecs
->locations
[ds_explicit
],
10265 "%<explicit%> in friend declaration");
10267 error_at (declspecs
->locations
[ds_explicit
],
10268 "only declarations of constructors and conversion operators "
10269 "can be %<explicit%>");
10273 if (storage_class
== sc_mutable
)
10275 if (decl_context
!= FIELD
|| friendp
)
10277 error ("non-member %qs cannot be declared %<mutable%>", name
);
10278 storage_class
= sc_none
;
10280 else if (decl_context
== TYPENAME
|| typedef_p
)
10282 error ("non-object member %qs cannot be declared %<mutable%>", name
);
10283 storage_class
= sc_none
;
10285 else if (TREE_CODE (type
) == FUNCTION_TYPE
10286 || TREE_CODE (type
) == METHOD_TYPE
)
10288 error ("function %qs cannot be declared %<mutable%>", name
);
10289 storage_class
= sc_none
;
10293 error ("static %qs cannot be declared %<mutable%>", name
);
10294 storage_class
= sc_none
;
10296 else if (type_quals
& TYPE_QUAL_CONST
)
10298 error ("const %qs cannot be declared %<mutable%>", name
);
10299 storage_class
= sc_none
;
10301 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10303 permerror (input_location
, "reference %qs cannot be declared "
10304 "%<mutable%>", name
);
10305 storage_class
= sc_none
;
10309 /* If this is declaring a typedef name, return a TYPE_DECL. */
10310 if (typedef_p
&& decl_context
!= TYPENAME
)
10314 /* Note that the grammar rejects storage classes
10315 in typenames, fields or parameters. */
10316 if (current_lang_name
== lang_name_java
)
10317 TYPE_FOR_JAVA (type
) = 1;
10319 /* This declaration:
10321 typedef void f(int) const;
10323 declares a function type which is not a member of any
10324 particular class, but which is cv-qualified; for
10325 example "f S::*" declares a pointer to a const-qualified
10326 member function of S. We record the cv-qualification in the
10328 if ((rqual
|| memfn_quals
) && TREE_CODE (type
) == FUNCTION_TYPE
)
10330 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10332 /* We have now dealt with these qualifiers. */
10333 memfn_quals
= TYPE_UNQUALIFIED
;
10334 rqual
= REF_QUAL_NONE
;
10337 if (type_uses_auto (type
))
10339 error ("typedef declared %<auto%>");
10340 type
= error_mark_node
;
10343 if (decl_context
== FIELD
)
10344 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
10346 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
10347 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
10348 error_at (DECL_SOURCE_LOCATION (decl
),
10349 "typedef name may not be a nested-name-specifier");
10350 TREE_TYPE (decl
) = error_mark_node
;
10353 if (decl_context
!= FIELD
)
10355 if (!current_function_decl
)
10356 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10357 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
10358 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
10359 (current_function_decl
)))
10360 /* The TYPE_DECL is "abstract" because there will be
10361 clones of this constructor/destructor, and there will
10362 be copies of this TYPE_DECL generated in those
10363 clones. The decloning optimization (for space) may
10364 revert this subsequently if it determines that
10365 the clones should share a common implementation. */
10366 DECL_ABSTRACT_P (decl
) = true;
10368 else if (current_class_type
10369 && constructor_name_p (unqualified_id
, current_class_type
))
10370 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
10371 "as enclosing class",
10374 /* If the user declares "typedef struct {...} foo" then the
10375 struct will have an anonymous name. Fill that name in now.
10376 Nothing can refer to it, so nothing needs know about the name
10378 if (type
!= error_mark_node
10380 && TYPE_NAME (type
)
10381 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10382 && TYPE_ANONYMOUS_P (type
)
10383 && declspecs
->type_definition_p
10384 && attributes_naming_typedef_ok (*attrlist
)
10385 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
10389 /* Replace the anonymous name with the real name everywhere. */
10390 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10392 if (anon_aggrname_p (TYPE_IDENTIFIER (t
)))
10393 /* We do not rename the debug info representing the
10394 anonymous tagged type because the standard says in
10395 [dcl.typedef] that the naming applies only for
10396 linkage purposes. */
10397 /*debug_hooks->set_name (t, decl);*/
10398 TYPE_NAME (t
) = decl
;
10401 if (TYPE_LANG_SPECIFIC (type
))
10402 TYPE_WAS_ANONYMOUS (type
) = 1;
10404 /* If this is a typedef within a template class, the nested
10405 type is a (non-primary) template. The name for the
10406 template needs updating as well. */
10407 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10408 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10409 = TYPE_IDENTIFIER (type
);
10411 /* Adjust linkage now that we aren't anonymous anymore. */
10412 reset_type_linkage (type
);
10414 /* FIXME remangle member functions; member functions of a
10415 type with external linkage have external linkage. */
10419 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10420 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10422 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
10423 memfn_quals
!= TYPE_UNQUALIFIED
,
10424 inlinep
, friendp
, raises
!= NULL_TREE
);
10426 if (decl_spec_seq_has_spec_p (declspecs
, ds_alias
))
10427 /* Acknowledge that this was written:
10428 `using analias = atype;'. */
10429 TYPE_DECL_ALIAS_P (decl
) = 1;
10434 /* Detect the case of an array type of unspecified size
10435 which came, as such, direct from a typedef name.
10436 We must copy the type, so that the array's domain can be
10437 individually set by the object's initializer. */
10439 if (type
&& typedef_type
10440 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
10441 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
10442 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
10444 /* Detect where we're using a typedef of function type to declare a
10445 function. PARMS will not be set, so we must create it now. */
10447 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
10449 tree decls
= NULL_TREE
;
10452 for (args
= TYPE_ARG_TYPES (type
);
10453 args
&& args
!= void_list_node
;
10454 args
= TREE_CHAIN (args
))
10456 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
10458 DECL_CHAIN (decl
) = decls
;
10462 parms
= nreverse (decls
);
10464 if (decl_context
!= TYPENAME
)
10466 /* The qualifiers on the function type become the qualifiers on
10467 the non-static member function. */
10468 memfn_quals
|= type_memfn_quals (type
);
10469 rqual
= type_memfn_rqual (type
);
10470 type_quals
= TYPE_UNQUALIFIED
;
10474 /* If this is a type name (such as, in a cast or sizeof),
10475 compute the type and return it now. */
10477 if (decl_context
== TYPENAME
)
10479 /* Note that the grammar rejects storage classes
10480 in typenames, fields or parameters. */
10481 if (type_quals
!= TYPE_UNQUALIFIED
)
10482 type_quals
= TYPE_UNQUALIFIED
;
10484 /* Special case: "friend class foo" looks like a TYPENAME context. */
10487 if (type_quals
!= TYPE_UNQUALIFIED
)
10489 error ("type qualifiers specified for friend class declaration");
10490 type_quals
= TYPE_UNQUALIFIED
;
10494 error ("%<inline%> specified for friend class declaration");
10500 /* Don't allow friend declaration without a class-key. */
10501 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10502 permerror (input_location
, "template parameters cannot be friends");
10503 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
10504 permerror (input_location
, "friend declaration requires class-key, "
10505 "i.e. %<friend class %T::%D%>",
10506 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
10508 permerror (input_location
, "friend declaration requires class-key, "
10509 "i.e. %<friend %#T%>",
10513 /* Only try to do this stuff if we didn't already give up. */
10514 if (type
!= integer_type_node
)
10516 /* A friendly class? */
10517 if (current_class_type
)
10518 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
10519 /*complain=*/true);
10521 error ("trying to make class %qT a friend of global scope",
10524 type
= void_type_node
;
10527 else if (memfn_quals
|| rqual
)
10529 if (ctype
== NULL_TREE
10530 && TREE_CODE (type
) == METHOD_TYPE
)
10531 ctype
= TYPE_METHOD_BASETYPE (type
);
10534 type
= build_memfn_type (type
, ctype
, memfn_quals
, rqual
);
10535 /* Core issue #547: need to allow this in template type args.
10536 Allow it in general in C++11 for alias-declarations. */
10537 else if ((template_type_arg
|| cxx_dialect
>= cxx11
)
10538 && TREE_CODE (type
) == FUNCTION_TYPE
)
10539 type
= apply_memfn_quals (type
, memfn_quals
, rqual
);
10541 error ("invalid qualifiers on non-member function type");
10546 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
10547 && decl_context
!= CATCHPARM
10548 && TREE_CODE (type
) != UNION_TYPE
10551 error ("abstract declarator %qT used as declaration", type
);
10552 return error_mark_node
;
10555 /* Only functions may be declared using an operator-function-id. */
10557 && IDENTIFIER_OPNAME_P (unqualified_id
)
10558 && TREE_CODE (type
) != FUNCTION_TYPE
10559 && TREE_CODE (type
) != METHOD_TYPE
)
10561 error ("declaration of %qD as non-function", unqualified_id
);
10562 return error_mark_node
;
10565 /* We don't check parameter types here because we can emit a better
10566 error message later. */
10567 if (decl_context
!= PARM
)
10569 type
= check_var_type (unqualified_id
, type
);
10570 if (type
== error_mark_node
)
10571 return error_mark_node
;
10574 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10575 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10577 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10579 if (ctype
|| in_namespace
)
10580 error ("cannot use %<::%> in parameter declaration");
10582 if (type_uses_auto (type
))
10584 if (cxx_dialect
>= cxx14
)
10585 error ("%<auto%> parameter not permitted in this context");
10587 error ("parameter declared %<auto%>");
10588 type
= error_mark_node
;
10591 /* A parameter declared as an array of T is really a pointer to T.
10592 One declared as a function is really a pointer to a function.
10593 One declared as a member is really a pointer to member. */
10595 if (TREE_CODE (type
) == ARRAY_TYPE
)
10597 /* Transfer const-ness of array into that of type pointed to. */
10598 type
= build_pointer_type (TREE_TYPE (type
));
10599 type_quals
= TYPE_UNQUALIFIED
;
10600 array_parameter_p
= true;
10602 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10603 type
= build_pointer_type (type
);
10606 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10607 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10609 cp_cv_quals real_quals
= memfn_quals
;
10610 if (cxx_dialect
< cxx14
&& constexpr_p
10611 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10612 real_quals
|= TYPE_QUAL_CONST
;
10613 type
= build_memfn_type (type
, ctype
, real_quals
, rqual
);
10619 if (decl_context
== PARM
)
10621 decl
= cp_build_parm_decl (unqualified_id
, type
);
10622 DECL_ARRAY_PARAMETER_P (decl
) = array_parameter_p
;
10624 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10625 memfn_quals
!= TYPE_UNQUALIFIED
,
10626 inlinep
, friendp
, raises
!= NULL_TREE
);
10628 else if (decl_context
== FIELD
)
10630 if (!staticp
&& !friendp
&& TREE_CODE (type
) != METHOD_TYPE
10631 && type_uses_auto (type
))
10633 error ("non-static data member declared %<auto%>");
10634 type
= error_mark_node
;
10637 /* The C99 flexible array extension. */
10638 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10639 && TYPE_DOMAIN (type
) == NULL_TREE
)
10641 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10642 tf_warning_or_error
);
10643 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10646 if (type
== error_mark_node
)
10648 /* Happens when declaring arrays of sizes which
10649 are error_mark_node, for example. */
10652 else if (in_namespace
&& !friendp
)
10654 /* Something like struct S { int N::j; }; */
10655 error ("invalid use of %<::%>");
10656 return error_mark_node
;
10658 else if (TREE_CODE (type
) == FUNCTION_TYPE
10659 || TREE_CODE (type
) == METHOD_TYPE
)
10662 tree function_context
;
10666 /* This should never happen in pure C++ (the check
10667 could be an assert). It could happen in
10668 Objective-C++ if someone writes invalid code that
10669 uses a function declaration for an instance
10670 variable or property (instance variables and
10671 properties are parsed as FIELD_DECLs, but they are
10672 part of an Objective-C class, not a C++ class).
10673 That code is invalid and is caught by this
10677 error ("declaration of function %qD in invalid context",
10679 return error_mark_node
;
10682 /* ``A union may [ ... ] not [ have ] virtual functions.''
10684 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10686 error ("function %qD declared virtual inside a union",
10688 return error_mark_node
;
10691 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10695 error ("%qD cannot be declared virtual, since it "
10696 "is always static",
10703 /* Check that the name used for a destructor makes sense. */
10704 if (sfk
== sfk_destructor
)
10706 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10710 gcc_assert (friendp
);
10711 error ("expected qualified name in friend declaration "
10712 "for destructor %qD", uqname
);
10713 return error_mark_node
;
10716 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10718 error ("declaration of %qD as member of %qT",
10720 return error_mark_node
;
10724 error ("a destructor cannot be %<constexpr%>");
10725 return error_mark_node
;
10728 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10730 error ("expected qualified name in friend declaration "
10731 "for constructor %qD",
10732 id_declarator
->u
.id
.unqualified_name
);
10733 return error_mark_node
;
10736 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10738 tree tmpl
= TREE_OPERAND (unqualified_id
, 0);
10739 if (variable_template_p (tmpl
))
10741 error ("specialization of variable template %qD "
10742 "declared as function", tmpl
);
10743 inform (DECL_SOURCE_LOCATION (tmpl
),
10744 "variable template declared here");
10745 return error_mark_node
;
10749 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10750 function_context
= (ctype
!= NULL_TREE
) ?
10751 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10752 publicp
= (! friendp
|| ! staticp
)
10753 && function_context
== NULL_TREE
;
10755 if (late_return_type_p
)
10756 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10758 decl
= grokfndecl (ctype
, type
,
10759 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10760 ? unqualified_id
: dname
,
10763 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10764 friendp
? -1 : 0, friendp
, publicp
,
10765 inlinep
| (2 * constexpr_p
),
10766 initialized
== SD_DELETED
, sfk
,
10767 funcdef_flag
, template_count
, in_namespace
,
10768 attrlist
, declarator
->id_loc
);
10769 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10770 if (decl
== NULL_TREE
)
10771 return error_mark_node
;
10773 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10774 /* The decl and setting of decl_attr is also turned off. */
10775 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10778 /* [class.conv.ctor]
10780 A constructor declared without the function-specifier
10781 explicit that can be called with a single parameter
10782 specifies a conversion from the type of its first
10783 parameter to the type of its class. Such a constructor
10784 is called a converting constructor. */
10785 if (explicitp
== 2)
10786 DECL_NONCONVERTING_P (decl
) = 1;
10788 else if (!staticp
&& !dependent_type_p (type
)
10789 && !COMPLETE_TYPE_P (complete_type (type
))
10790 && (TREE_CODE (type
) != ARRAY_TYPE
10791 || !COMPLETE_TYPE_P (TREE_TYPE (type
))
10792 || initialized
== 0))
10794 if (unqualified_id
)
10796 error ("field %qD has incomplete type %qT",
10797 unqualified_id
, type
);
10798 cxx_incomplete_type_inform (strip_array_types (type
));
10801 error ("name %qT has incomplete type", type
);
10803 type
= error_mark_node
;
10810 error ("%qE is neither function nor member function; "
10811 "cannot be declared friend", unqualified_id
);
10819 /* Friends are treated specially. */
10820 if (ctype
== current_class_type
)
10821 ; /* We already issued a permerror. */
10822 else if (decl
&& DECL_NAME (decl
))
10824 if (template_class_depth (current_class_type
) == 0)
10826 decl
= check_explicit_specialization
10827 (unqualified_id
, decl
, template_count
,
10828 2 * funcdef_flag
+ 4);
10829 if (decl
== error_mark_node
)
10830 return error_mark_node
;
10833 decl
= do_friend (ctype
, unqualified_id
, decl
,
10839 return error_mark_node
;
10842 /* Structure field. It may not be a function, except for C++. */
10844 if (decl
== NULL_TREE
)
10848 /* C++ allows static class members. All other work
10849 for this is done by grokfield. */
10850 decl
= build_lang_decl_loc (declarator
10851 ? declarator
->id_loc
10853 VAR_DECL
, unqualified_id
, type
);
10854 set_linkage_for_static_data_member (decl
);
10855 /* Even if there is an in-class initialization, DECL
10856 is considered undefined until an out-of-class
10857 definition is provided. */
10858 DECL_EXTERNAL (decl
) = 1;
10862 set_decl_tls_model (decl
, decl_default_tls_model (decl
));
10863 if (declspecs
->gnu_thread_keyword_p
)
10864 DECL_GNU_TLS_P (decl
) = true;
10867 if (constexpr_p
&& !initialized
)
10869 error ("constexpr static data member %qD must have an "
10870 "initializer", decl
);
10871 constexpr_p
= false;
10878 error ("non-static data member %qE declared %<constexpr%>",
10880 constexpr_p
= false;
10882 decl
= build_decl (input_location
,
10883 FIELD_DECL
, unqualified_id
, type
);
10884 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10885 if (bitfield
&& !unqualified_id
)
10886 TREE_NO_WARNING (decl
) = 1;
10888 if (storage_class
== sc_mutable
)
10890 DECL_MUTABLE_P (decl
) = 1;
10891 storage_class
= sc_none
;
10896 /* An attempt is being made to initialize a non-static
10897 member. This is new in C++11. */
10898 maybe_warn_cpp0x (CPP0X_NSDMI
);
10900 /* If this has been parsed with static storage class, but
10901 errors forced staticp to be cleared, ensure NSDMI is
10903 if (declspecs
->storage_class
== sc_static
)
10904 DECL_INITIAL (decl
) = error_mark_node
;
10908 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10909 memfn_quals
!= TYPE_UNQUALIFIED
,
10910 inlinep
, friendp
, raises
!= NULL_TREE
);
10913 else if (TREE_CODE (type
) == FUNCTION_TYPE
10914 || TREE_CODE (type
) == METHOD_TYPE
)
10916 tree original_name
;
10919 if (!unqualified_id
)
10920 return error_mark_node
;
10922 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10923 original_name
= dname
;
10925 original_name
= unqualified_id
;
10927 if (storage_class
== sc_auto
)
10928 error ("storage class %<auto%> invalid for function %qs", name
);
10929 else if (storage_class
== sc_register
)
10930 error ("storage class %<register%> invalid for function %qs", name
);
10933 if (declspecs
->gnu_thread_keyword_p
)
10934 error ("storage class %<__thread%> invalid for function %qs",
10937 error ("storage class %<thread_local%> invalid for function %qs",
10941 if (virt_specifiers
)
10942 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10943 /* Function declaration not at top level.
10944 Storage classes other than `extern' are not allowed
10945 and `extern' makes no difference. */
10946 if (! toplevel_bindings_p ()
10947 && (storage_class
== sc_static
10948 || decl_spec_seq_has_spec_p (declspecs
, ds_inline
))
10951 if (storage_class
== sc_static
)
10952 pedwarn (input_location
, OPT_Wpedantic
,
10953 "%<static%> specified invalid for function %qs "
10954 "declared out of global scope", name
);
10956 pedwarn (input_location
, OPT_Wpedantic
,
10957 "%<inline%> specifier invalid for function %qs "
10958 "declared out of global scope", name
);
10961 if (ctype
== NULL_TREE
)
10965 error ("virtual non-class function %qs", name
);
10968 else if (sfk
== sfk_constructor
10969 || sfk
== sfk_destructor
)
10971 error (funcdef_flag
10972 ? G_("%qs defined in a non-class scope")
10973 : G_("%qs declared in a non-class scope"), name
);
10978 /* Record whether the function is public. */
10979 publicp
= (ctype
!= NULL_TREE
10980 || storage_class
!= sc_static
);
10982 if (late_return_type_p
)
10983 TYPE_HAS_LATE_RETURN_TYPE (type
) = 1;
10985 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10986 virtualp
, flags
, memfn_quals
, rqual
, raises
,
10988 publicp
, inlinep
| (2 * constexpr_p
),
10989 initialized
== SD_DELETED
, sfk
,
10991 template_count
, in_namespace
, attrlist
,
10992 declarator
->id_loc
);
10993 if (decl
== NULL_TREE
)
10994 return error_mark_node
;
10998 int invalid_static
= 0;
11000 /* Don't allow a static member function in a class, and forbid
11001 declaring main to be static. */
11002 if (TREE_CODE (type
) == METHOD_TYPE
)
11004 permerror (input_location
, "cannot declare member function %qD to have "
11005 "static linkage", decl
);
11006 invalid_static
= 1;
11008 else if (current_function_decl
)
11010 /* FIXME need arm citation */
11011 error ("cannot declare static function inside another function");
11012 invalid_static
= 1;
11015 if (invalid_static
)
11018 storage_class
= sc_none
;
11024 /* It's a variable. */
11026 /* An uninitialized decl with `extern' is a reference. */
11027 decl
= grokvardecl (type
, dname
, unqualified_id
,
11030 (type_quals
& TYPE_QUAL_CONST
) != 0,
11032 ctype
? ctype
: in_namespace
);
11033 if (decl
== NULL_TREE
)
11034 return error_mark_node
;
11036 bad_specifiers (decl
, BSP_VAR
, virtualp
,
11037 memfn_quals
!= TYPE_UNQUALIFIED
,
11038 inlinep
, friendp
, raises
!= NULL_TREE
);
11042 DECL_CONTEXT (decl
) = ctype
;
11045 permerror (input_location
, "%<static%> may not be used when defining "
11046 "(as opposed to declaring) a static data member");
11048 storage_class
= sc_none
;
11050 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
11052 error ("static member %qD declared %<register%>", decl
);
11053 storage_class
= sc_none
;
11055 if (storage_class
== sc_extern
&& pedantic
)
11057 pedwarn (input_location
, OPT_Wpedantic
,
11058 "cannot explicitly declare member %q#D to have "
11059 "extern linkage", decl
);
11060 storage_class
= sc_none
;
11063 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
11065 error ("declaration of constexpr variable %qD is not a definition",
11067 constexpr_p
= false;
11071 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
11073 if (toplevel_bindings_p ())
11075 /* It's common practice (and completely valid) to have a const
11076 be initialized and declared extern. */
11077 if (!(type_quals
& TYPE_QUAL_CONST
))
11078 warning (0, "%qs initialized and declared %<extern%>", name
);
11082 error ("%qs has both %<extern%> and initializer", name
);
11083 return error_mark_node
;
11087 /* Record `register' declaration for warnings on &
11088 and in case doing stupid register allocation. */
11090 if (storage_class
== sc_register
)
11091 DECL_REGISTER (decl
) = 1;
11092 else if (storage_class
== sc_extern
)
11093 DECL_THIS_EXTERN (decl
) = 1;
11094 else if (storage_class
== sc_static
)
11095 DECL_THIS_STATIC (decl
) = 1;
11097 /* Set constexpr flag on vars (functions got it in grokfndecl). */
11098 if (constexpr_p
&& VAR_P (decl
))
11099 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
11101 /* Record constancy and volatility on the DECL itself . There's
11102 no need to do this when processing a template; we'll do this
11103 for the instantiated declaration based on the type of DECL. */
11104 if (!processing_template_decl
)
11105 cp_apply_type_quals_to_decl (type_quals
, decl
);
11111 /* Subroutine of start_function. Ensure that each of the parameter
11112 types (as listed in PARMS) is complete, as is required for a
11113 function definition. */
11116 require_complete_types_for_parms (tree parms
)
11118 for (; parms
; parms
= DECL_CHAIN (parms
))
11120 if (dependent_type_p (TREE_TYPE (parms
)))
11122 if (!VOID_TYPE_P (TREE_TYPE (parms
))
11123 && complete_type_or_else (TREE_TYPE (parms
), parms
))
11125 relayout_decl (parms
);
11126 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
11129 /* grokparms or complete_type_or_else will have already issued
11131 TREE_TYPE (parms
) = error_mark_node
;
11135 /* Returns nonzero if T is a local variable. */
11138 local_variable_p (const_tree t
)
11141 /* A VAR_DECL with a context that is a _TYPE is a static data
11143 && !TYPE_P (CP_DECL_CONTEXT (t
))
11144 /* Any other non-local variable must be at namespace scope. */
11145 && !DECL_NAMESPACE_SCOPE_P (t
))
11146 || (TREE_CODE (t
) == PARM_DECL
))
11152 /* Like local_variable_p, but suitable for use as a tree-walking
11156 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
11159 if (local_variable_p (*tp
)
11160 && (!DECL_ARTIFICIAL (*tp
) || DECL_NAME (*tp
) == this_identifier
))
11162 else if (TYPE_P (*tp
))
11163 *walk_subtrees
= 0;
11168 /* Check that ARG, which is a default-argument expression for a
11169 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
11170 something goes wrong. DECL may also be a _TYPE node, rather than a
11171 DECL, if there is no DECL available. */
11174 check_default_argument (tree decl
, tree arg
, tsubst_flags_t complain
)
11179 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11180 /* We get a DEFAULT_ARG when looking at an in-class declaration
11181 with a default argument. Ignore the argument for now; we'll
11182 deal with it after the class is complete. */
11191 decl_type
= TREE_TYPE (decl
);
11193 if (arg
== error_mark_node
11194 || decl
== error_mark_node
11195 || TREE_TYPE (arg
) == error_mark_node
11196 || decl_type
== error_mark_node
)
11197 /* Something already went wrong. There's no need to check
11199 return error_mark_node
;
11201 /* [dcl.fct.default]
11203 A default argument expression is implicitly converted to the
11205 ++cp_unevaluated_operand
;
11206 perform_implicit_conversion_flags (decl_type
, arg
, complain
,
11208 --cp_unevaluated_operand
;
11210 /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
11212 if (TYPE_PTR_OR_PTRMEM_P (decl_type
)
11213 && null_ptr_cst_p (arg
))
11214 return nullptr_node
;
11216 /* [dcl.fct.default]
11218 Local variables shall not be used in default argument
11221 The keyword `this' shall not be used in a default argument of a
11222 member function. */
11223 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
11226 if (complain
& tf_warning_or_error
)
11228 if (DECL_NAME (var
) == this_identifier
)
11229 permerror (input_location
, "default argument %qE uses %qD",
11232 error ("default argument %qE uses local variable %qD", arg
, var
);
11234 return error_mark_node
;
11241 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
11244 type_is_deprecated (tree type
)
11246 enum tree_code code
;
11247 if (TREE_DEPRECATED (type
))
11249 if (TYPE_NAME (type
)
11250 && TREE_DEPRECATED (TYPE_NAME (type
)))
11253 /* Do warn about using typedefs to a deprecated class. */
11254 if (OVERLOAD_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
11255 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
11257 code
= TREE_CODE (type
);
11259 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
11260 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
11261 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
11262 return type_is_deprecated (TREE_TYPE (type
));
11264 if (TYPE_PTRMEMFUNC_P (type
))
11265 return type_is_deprecated
11266 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
11271 /* Decode the list of parameter types for a function type.
11272 Given the list of things declared inside the parens,
11273 return a list of types.
11275 If this parameter does not end with an ellipsis, we append
11278 *PARMS is set to the chain of PARM_DECLs created. */
11281 grokparms (tree parmlist
, tree
*parms
)
11283 tree result
= NULL_TREE
;
11284 tree decls
= NULL_TREE
;
11288 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
11290 tree type
= NULL_TREE
;
11291 tree init
= TREE_PURPOSE (parm
);
11292 tree decl
= TREE_VALUE (parm
);
11293 const char *errmsg
;
11295 if (parm
== void_list_node
)
11298 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11301 type
= TREE_TYPE (decl
);
11302 if (VOID_TYPE_P (type
))
11304 if (same_type_p (type
, void_type_node
)
11306 && !DECL_NAME (decl
) && !result
11307 && TREE_CHAIN (parm
) == void_list_node
)
11308 /* DR 577: A parameter list consisting of a single
11309 unnamed parameter of non-dependent type 'void'. */
11311 else if (cv_qualified_p (type
))
11312 error_at (DECL_SOURCE_LOCATION (decl
),
11313 "invalid use of cv-qualified type %qT in "
11314 "parameter declaration", type
);
11316 error_at (DECL_SOURCE_LOCATION (decl
),
11317 "invalid use of type %<void%> in parameter "
11319 /* It's not a good idea to actually create parameters of
11320 type `void'; other parts of the compiler assume that a
11321 void type terminates the parameter list. */
11322 type
= error_mark_node
;
11323 TREE_TYPE (decl
) = error_mark_node
;
11326 if (type
!= error_mark_node
11327 && TYPE_FOR_JAVA (type
)
11328 && MAYBE_CLASS_TYPE_P (type
))
11330 error ("parameter %qD has Java class type", decl
);
11331 type
= error_mark_node
;
11332 TREE_TYPE (decl
) = error_mark_node
;
11336 if (type
!= error_mark_node
11337 && (errmsg
= targetm
.invalid_parameter_type (type
)))
11340 type
= error_mark_node
;
11341 TREE_TYPE (decl
) = error_mark_node
;
11344 if (type
!= error_mark_node
)
11346 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
11348 tree deptype
= type_is_deprecated (type
);
11350 warn_deprecated_use (deptype
, NULL_TREE
);
11353 /* Top-level qualifiers on the parameters are
11354 ignored for function types. */
11355 type
= cp_build_qualified_type (type
, 0);
11356 if (TREE_CODE (type
) == METHOD_TYPE
)
11358 error ("parameter %qD invalidly declared method type", decl
);
11359 type
= build_pointer_type (type
);
11360 TREE_TYPE (decl
) = type
;
11362 else if (abstract_virtuals_error (decl
, type
))
11363 any_error
= 1; /* Seems like a good idea. */
11364 else if (POINTER_TYPE_P (type
))
11366 /* [dcl.fct]/6, parameter types cannot contain pointers
11367 (references) to arrays of unknown bound. */
11368 tree t
= TREE_TYPE (type
);
11369 int ptr
= TYPE_PTR_P (type
);
11373 if (TYPE_PTR_P (t
))
11375 else if (TREE_CODE (t
) != ARRAY_TYPE
)
11377 else if (!TYPE_DOMAIN (t
))
11381 if (TREE_CODE (t
) == ARRAY_TYPE
)
11383 ? G_("parameter %qD includes pointer to array of "
11384 "unknown bound %qT")
11385 : G_("parameter %qD includes reference to array of "
11386 "unknown bound %qT"),
11392 else if (init
&& !processing_template_decl
)
11393 init
= check_default_argument (decl
, init
, tf_warning_or_error
);
11396 DECL_CHAIN (decl
) = decls
;
11398 result
= tree_cons (init
, type
, result
);
11400 decls
= nreverse (decls
);
11401 result
= nreverse (result
);
11403 result
= chainon (result
, void_list_node
);
11410 /* D is a constructor or overloaded `operator='.
11412 Let T be the class in which D is declared. Then, this function
11415 -1 if D's is an ill-formed constructor or copy assignment operator
11416 whose first parameter is of type `T'.
11417 0 if D is not a copy constructor or copy assignment
11419 1 if D is a copy constructor or copy assignment operator whose
11420 first parameter is a reference to non-const qualified T.
11421 2 if D is a copy constructor or copy assignment operator whose
11422 first parameter is a reference to const qualified T.
11424 This function can be used as a predicate. Positive values indicate
11425 a copy constructor and nonzero values indicate a copy assignment
11429 copy_fn_p (const_tree d
)
11435 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11437 if (TREE_CODE (d
) == TEMPLATE_DECL
11438 || (DECL_TEMPLATE_INFO (d
)
11439 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11440 /* Instantiations of template member functions are never copy
11441 functions. Note that member functions of templated classes are
11442 represented as template functions internally, and we must
11443 accept those as copy functions. */
11446 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11450 arg_type
= TREE_VALUE (args
);
11451 if (arg_type
== error_mark_node
)
11454 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
11456 /* Pass by value copy assignment operator. */
11459 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11460 && !TYPE_REF_IS_RVALUE (arg_type
)
11461 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
11463 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
11469 args
= TREE_CHAIN (args
);
11471 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11472 /* There are more non-optional args. */
11478 /* D is a constructor or overloaded `operator='.
11480 Let T be the class in which D is declared. Then, this function
11481 returns true when D is a move constructor or move assignment
11482 operator, false otherwise. */
11485 move_fn_p (const_tree d
)
11487 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
11489 if (cxx_dialect
== cxx98
)
11490 /* There are no move constructors if we are in C++98 mode. */
11493 if (TREE_CODE (d
) == TEMPLATE_DECL
11494 || (DECL_TEMPLATE_INFO (d
)
11495 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
11496 /* Instantiations of template member functions are never move
11497 functions. Note that member functions of templated classes are
11498 represented as template functions internally, and we must
11499 accept those as move functions. */
11502 return move_signature_fn_p (d
);
11505 /* D is a constructor or overloaded `operator='.
11507 Then, this function returns true when D has the same signature as a move
11508 constructor or move assignment operator (because either it is such a
11509 ctor/op= or it is a template specialization with the same signature),
11510 false otherwise. */
11513 move_signature_fn_p (const_tree d
)
11517 bool result
= false;
11519 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
11523 arg_type
= TREE_VALUE (args
);
11524 if (arg_type
== error_mark_node
)
11527 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
11528 && TYPE_REF_IS_RVALUE (arg_type
)
11529 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
11533 args
= TREE_CHAIN (args
);
11535 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
11536 /* There are more non-optional args. */
11542 /* Remember any special properties of member function DECL. */
11545 grok_special_member_properties (tree decl
)
11549 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
11552 class_type
= DECL_CONTEXT (decl
);
11553 if (DECL_CONSTRUCTOR_P (decl
))
11555 int ctor
= copy_fn_p (decl
);
11557 if (!DECL_ARTIFICIAL (decl
))
11558 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
11564 A non-template constructor for class X is a copy
11565 constructor if its first parameter is of type X&, const
11566 X&, volatile X& or const volatile X&, and either there
11567 are no other parameters or else all other parameters have
11568 default arguments. */
11569 TYPE_HAS_COPY_CTOR (class_type
) = 1;
11570 if (user_provided_p (decl
))
11571 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
11573 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
11575 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
11576 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
11577 else if (move_fn_p (decl
) && user_provided_p (decl
))
11578 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
11579 else if (is_list_ctor (decl
))
11580 TYPE_HAS_LIST_CTOR (class_type
) = 1;
11582 if (DECL_DECLARED_CONSTEXPR_P (decl
)
11583 && !copy_fn_p (decl
) && !move_fn_p (decl
))
11584 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
11586 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
11590 A non-template assignment operator for class X is a copy
11591 assignment operator if its parameter is of type X, X&, const
11592 X&, volatile X& or const volatile X&. */
11594 int assop
= copy_fn_p (decl
);
11598 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
11599 if (user_provided_p (decl
))
11600 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
11602 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
11604 else if (move_fn_p (decl
) && user_provided_p (decl
))
11605 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
11607 /* Destructors are handled in check_methods. */
11610 /* Check a constructor DECL has the correct form. Complains
11611 if the class has a constructor of the form X(X). */
11614 grok_ctor_properties (const_tree ctype
, const_tree decl
)
11616 int ctor_parm
= copy_fn_p (decl
);
11622 A declaration of a constructor for a class X is ill-formed if
11623 its first parameter is of type (optionally cv-qualified) X
11624 and either there are no other parameters or else all other
11625 parameters have default arguments.
11627 We *don't* complain about member template instantiations that
11628 have this form, though; they can occur as we try to decide
11629 what constructor to use during overload resolution. Since
11630 overload resolution will never prefer such a constructor to
11631 the non-template copy constructor (which is either explicitly
11632 or implicitly defined), there's no need to worry about their
11633 existence. Theoretically, they should never even be
11634 instantiated, but that's hard to forestall. */
11635 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
11643 /* An operator with this code is unary, but can also be binary. */
11646 ambi_op_p (enum tree_code code
)
11648 return (code
== INDIRECT_REF
11649 || code
== ADDR_EXPR
11650 || code
== UNARY_PLUS_EXPR
11651 || code
== NEGATE_EXPR
11652 || code
== PREINCREMENT_EXPR
11653 || code
== PREDECREMENT_EXPR
);
11656 /* An operator with this name can only be unary. */
11659 unary_op_p (enum tree_code code
)
11661 return (code
== TRUTH_NOT_EXPR
11662 || code
== BIT_NOT_EXPR
11663 || code
== COMPONENT_REF
11664 || code
== TYPE_EXPR
);
11667 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11668 errors are issued for invalid declarations. */
11671 grok_op_properties (tree decl
, bool complain
)
11673 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11675 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11676 tree name
= DECL_NAME (decl
);
11677 enum tree_code operator_code
;
11682 /* Count the number of arguments and check for ellipsis. */
11683 for (argtype
= argtypes
, arity
= 0;
11684 argtype
&& argtype
!= void_list_node
;
11685 argtype
= TREE_CHAIN (argtype
))
11687 ellipsis_p
= !argtype
;
11689 class_type
= DECL_CONTEXT (decl
);
11690 if (class_type
&& !CLASS_TYPE_P (class_type
))
11691 class_type
= NULL_TREE
;
11693 if (DECL_CONV_FN_P (decl
))
11694 operator_code
= TYPE_EXPR
;
11698 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11699 if (ansi_opname (CODE) == name) \
11701 operator_code = (CODE); \
11704 else if (ansi_assopname (CODE) == name) \
11706 operator_code = (CODE); \
11707 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11711 #include "operators.def"
11712 #undef DEF_OPERATOR
11714 gcc_unreachable ();
11717 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11718 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11721 switch (operator_code
)
11724 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11728 TYPE_GETS_DELETE (class_type
) |= 1;
11732 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11735 case VEC_DELETE_EXPR
:
11736 TYPE_GETS_DELETE (class_type
) |= 2;
11743 /* [basic.std.dynamic.allocation]/1:
11745 A program is ill-formed if an allocation function is declared
11746 in a namespace scope other than global scope or declared static
11749 The same also holds true for deallocation functions. */
11750 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11751 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11753 if (DECL_NAMESPACE_SCOPE_P (decl
))
11755 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11757 error ("%qD may not be declared within a namespace", decl
);
11760 else if (!TREE_PUBLIC (decl
))
11762 error ("%qD may not be declared as static", decl
);
11768 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11770 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11771 DECL_IS_OPERATOR_NEW (decl
) = 1;
11773 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11774 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11777 /* An operator function must either be a non-static member function
11778 or have at least one parameter of a class, a reference to a class,
11779 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11780 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11782 if (operator_code
== TYPE_EXPR
11783 || operator_code
== CALL_EXPR
11784 || operator_code
== COMPONENT_REF
11785 || operator_code
== ARRAY_REF
11786 || operator_code
== NOP_EXPR
)
11788 error ("%qD must be a nonstatic member function", decl
);
11795 if (DECL_STATIC_FUNCTION_P (decl
))
11797 error ("%qD must be either a non-static member "
11798 "function or a non-member function", decl
);
11802 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11804 tree arg
= non_reference (TREE_VALUE (p
));
11805 if (arg
== error_mark_node
)
11808 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11809 because these checks are performed even on
11810 template functions. */
11811 if (MAYBE_CLASS_TYPE_P (arg
)
11812 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11816 if (!p
|| p
== void_list_node
)
11819 error ("%qD must have an argument of class or "
11820 "enumerated type", decl
);
11826 /* There are no restrictions on the arguments to an overloaded
11828 if (operator_code
== CALL_EXPR
)
11831 /* Warn about conversion operators that will never be used. */
11832 if (IDENTIFIER_TYPENAME_P (name
)
11833 && ! DECL_TEMPLATE_INFO (decl
)
11835 /* Warn only declaring the function; there is no need to
11836 warn again about out-of-class definitions. */
11837 && class_type
== current_class_type
)
11839 tree t
= TREE_TYPE (name
);
11840 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11843 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11845 if (VOID_TYPE_P (t
))
11846 warning (OPT_Wconversion
,
11848 ? G_("conversion to a reference to void "
11849 "will never use a type conversion operator")
11850 : G_("conversion to void "
11851 "will never use a type conversion operator"));
11852 else if (class_type
)
11854 if (t
== class_type
)
11855 warning (OPT_Wconversion
,
11857 ? G_("conversion to a reference to the same type "
11858 "will never use a type conversion operator")
11859 : G_("conversion to the same type "
11860 "will never use a type conversion operator"));
11861 /* Don't force t to be complete here. */
11862 else if (MAYBE_CLASS_TYPE_P (t
)
11863 && COMPLETE_TYPE_P (t
)
11864 && DERIVED_FROM_P (t
, class_type
))
11865 warning (OPT_Wconversion
,
11867 ? G_("conversion to a reference to a base class "
11868 "will never use a type conversion operator")
11869 : G_("conversion to a base class "
11870 "will never use a type conversion operator"));
11875 if (operator_code
== COND_EXPR
)
11878 error ("ISO C++ prohibits overloading operator ?:");
11881 else if (ellipsis_p
)
11883 error ("%qD must not have variable number of arguments", decl
);
11886 else if (ambi_op_p (operator_code
))
11889 /* We pick the one-argument operator codes by default, so
11890 we don't have to change anything. */
11892 else if (arity
== 2)
11894 /* If we thought this was a unary operator, we now know
11895 it to be a binary operator. */
11896 switch (operator_code
)
11899 operator_code
= MULT_EXPR
;
11903 operator_code
= BIT_AND_EXPR
;
11906 case UNARY_PLUS_EXPR
:
11907 operator_code
= PLUS_EXPR
;
11911 operator_code
= MINUS_EXPR
;
11914 case PREINCREMENT_EXPR
:
11915 operator_code
= POSTINCREMENT_EXPR
;
11918 case PREDECREMENT_EXPR
:
11919 operator_code
= POSTDECREMENT_EXPR
;
11923 gcc_unreachable ();
11926 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11928 if ((operator_code
== POSTINCREMENT_EXPR
11929 || operator_code
== POSTDECREMENT_EXPR
)
11930 && ! processing_template_decl
11931 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11934 error ("postfix %qD must take %<int%> as its argument",
11937 error ("postfix %qD must take %<int%> as its second "
11945 error ("%qD must take either zero or one argument", decl
);
11947 error ("%qD must take either one or two arguments", decl
);
11951 /* More Effective C++ rule 6. */
11953 && (operator_code
== POSTINCREMENT_EXPR
11954 || operator_code
== POSTDECREMENT_EXPR
11955 || operator_code
== PREINCREMENT_EXPR
11956 || operator_code
== PREDECREMENT_EXPR
))
11958 tree arg
= TREE_VALUE (argtypes
);
11959 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11960 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11961 arg
= TREE_TYPE (arg
);
11962 arg
= TYPE_MAIN_VARIANT (arg
);
11963 if (operator_code
== PREINCREMENT_EXPR
11964 || operator_code
== PREDECREMENT_EXPR
)
11966 if (TREE_CODE (ret
) != REFERENCE_TYPE
11967 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11969 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11970 build_reference_type (arg
));
11974 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11975 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11979 else if (unary_op_p (operator_code
))
11984 error ("%qD must take %<void%>", decl
);
11986 error ("%qD must take exactly one argument", decl
);
11990 else /* if (binary_op_p (operator_code)) */
11995 error ("%qD must take exactly one argument", decl
);
11997 error ("%qD must take exactly two arguments", decl
);
12001 /* More Effective C++ rule 7. */
12003 && (operator_code
== TRUTH_ANDIF_EXPR
12004 || operator_code
== TRUTH_ORIF_EXPR
12005 || operator_code
== COMPOUND_EXPR
))
12006 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
12010 /* Effective C++ rule 23. */
12013 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
12014 && (operator_code
== PLUS_EXPR
12015 || operator_code
== MINUS_EXPR
12016 || operator_code
== TRUNC_DIV_EXPR
12017 || operator_code
== MULT_EXPR
12018 || operator_code
== TRUNC_MOD_EXPR
)
12019 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
12020 warning (OPT_Weffc__
, "%qD should return by value", decl
);
12022 /* [over.oper]/8 */
12023 for (; argtypes
&& argtypes
!= void_list_node
;
12024 argtypes
= TREE_CHAIN (argtypes
))
12025 if (TREE_PURPOSE (argtypes
))
12027 TREE_PURPOSE (argtypes
) = NULL_TREE
;
12028 if (operator_code
== POSTINCREMENT_EXPR
12029 || operator_code
== POSTDECREMENT_EXPR
)
12031 pedwarn (input_location
, OPT_Wpedantic
, "%qD cannot have default arguments",
12036 error ("%qD cannot have default arguments", decl
);
12044 /* Return a string giving the keyword associate with CODE. */
12046 static const char *
12047 tag_name (enum tag_types code
)
12059 case typename_type
:
12062 gcc_unreachable ();
12066 /* Name lookup in an elaborated-type-specifier (after the keyword
12067 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
12068 elaborated-type-specifier is invalid, issue a diagnostic and return
12069 error_mark_node; otherwise, return the *_TYPE to which it referred.
12070 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
12073 check_elaborated_type_specifier (enum tag_types tag_code
,
12075 bool allow_template_p
)
12081 struct S { struct S *p; };
12083 name lookup will find the TYPE_DECL for the implicit "S::S"
12084 typedef. Adjust for that here. */
12085 if (DECL_SELF_REFERENCE_P (decl
))
12086 decl
= TYPE_NAME (TREE_TYPE (decl
));
12088 type
= TREE_TYPE (decl
);
12090 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
12091 is false for this case as well. */
12092 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
12094 error ("using template type parameter %qT after %qs",
12095 type
, tag_name (tag_code
));
12096 return error_mark_node
;
12098 /* Accept template template parameters. */
12099 else if (allow_template_p
12100 && (TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
12101 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
))
12105 If the identifier resolves to a typedef-name or the
12106 simple-template-id resolves to an alias template
12107 specialization, the elaborated-type-specifier is ill-formed.
12109 In other words, the only legitimate declaration to use in the
12110 elaborated type specifier is the implicit typedef created when
12111 the type is declared. */
12112 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
12113 && !DECL_SELF_REFERENCE_P (decl
)
12114 && tag_code
!= typename_type
)
12116 if (alias_template_specialization_p (type
))
12117 error ("using alias template specialization %qT after %qs",
12118 type
, tag_name (tag_code
));
12120 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
12121 inform (DECL_SOURCE_LOCATION (decl
),
12122 "%qD has a previous declaration here", decl
);
12123 return error_mark_node
;
12125 else if (TREE_CODE (type
) != RECORD_TYPE
12126 && TREE_CODE (type
) != UNION_TYPE
12127 && tag_code
!= enum_type
12128 && tag_code
!= typename_type
)
12130 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
12131 inform (input_location
, "%q+T has a previous declaration here", type
);
12132 return error_mark_node
;
12134 else if (TREE_CODE (type
) != ENUMERAL_TYPE
12135 && tag_code
== enum_type
)
12137 error ("%qT referred to as enum", type
);
12138 inform (input_location
, "%q+T has a previous declaration here", type
);
12139 return error_mark_node
;
12141 else if (!allow_template_p
12142 && TREE_CODE (type
) == RECORD_TYPE
12143 && CLASSTYPE_IS_TEMPLATE (type
))
12145 /* If a class template appears as elaborated type specifier
12146 without a template header such as:
12148 template <class T> class C {};
12149 void f(class C); // No template header here
12151 then the required template argument is missing. */
12152 error ("template argument required for %<%s %T%>",
12153 tag_name (tag_code
),
12154 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
12155 return error_mark_node
;
12161 /* Lookup NAME in elaborate type specifier in scope according to
12162 SCOPE and issue diagnostics if necessary.
12163 Return *_TYPE node upon success, NULL_TREE when the NAME is not
12164 found, and ERROR_MARK_NODE for type error. */
12167 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
12168 tag_scope scope
, bool template_header_p
)
12172 if (scope
== ts_global
)
12174 /* First try ordinary name lookup, ignoring hidden class name
12175 injected via friend declaration. */
12176 decl
= lookup_name_prefer_type (name
, 2);
12177 decl
= strip_using_decl (decl
);
12178 /* If that fails, the name will be placed in the smallest
12179 non-class, non-function-prototype scope according to 3.3.1/5.
12180 We may already have a hidden name declared as friend in this
12181 scope. So lookup again but not ignoring hidden names.
12182 If we find one, that name will be made visible rather than
12183 creating a new tag. */
12185 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
12188 decl
= lookup_type_scope (name
, scope
);
12191 && (DECL_CLASS_TEMPLATE_P (decl
)
12192 /* If scope is ts_current we're defining a class, so ignore a
12193 template template parameter. */
12194 || (scope
!= ts_current
12195 && DECL_TEMPLATE_TEMPLATE_PARM_P (decl
))))
12196 decl
= DECL_TEMPLATE_RESULT (decl
);
12198 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
12200 /* Look for invalid nested type:
12204 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
12206 error ("%qD has the same name as the class in which it is "
12209 return error_mark_node
;
12212 /* Two cases we need to consider when deciding if a class
12213 template is allowed as an elaborated type specifier:
12214 1. It is a self reference to its own class.
12215 2. It comes with a template header.
12219 template <class T> class C {
12220 class C *c1; // DECL_SELF_REFERENCE_P is true
12223 template <class U> class C; // template_header_p is true
12224 template <class T> class C<T>::D {
12225 class C *c2; // DECL_SELF_REFERENCE_P is true
12228 t
= check_elaborated_type_specifier (tag_code
,
12231 | DECL_SELF_REFERENCE_P (decl
));
12234 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
12236 error ("reference to %qD is ambiguous", name
);
12237 print_candidates (decl
);
12238 return error_mark_node
;
12244 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
12245 Define the tag as a forward-reference if it is not defined.
12247 If a declaration is given, process it here, and report an error if
12248 multiple declarations are not identical.
12250 SCOPE is TS_CURRENT when this is also a definition. Only look in
12251 the current frame for the name (since C++ allows new names in any
12252 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
12253 declaration. Only look beginning from the current scope outward up
12254 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
12256 TEMPLATE_HEADER_P is true when this declaration is preceded by
12257 a set of template parameters. */
12260 xref_tag_1 (enum tag_types tag_code
, tree name
,
12261 tag_scope orig_scope
, bool template_header_p
)
12263 enum tree_code code
;
12265 tree context
= NULL_TREE
;
12268 gcc_assert (identifier_p (name
));
12274 code
= RECORD_TYPE
;
12280 code
= ENUMERAL_TYPE
;
12283 gcc_unreachable ();
12286 if (orig_scope
== ts_lambda
)
12287 scope
= ts_current
;
12289 scope
= orig_scope
;
12291 /* In case of anonymous name, xref_tag is only called to
12292 make type node and push name. Name lookup is not required. */
12293 if (anon_aggrname_p (name
))
12296 t
= lookup_and_check_tag (tag_code
, name
,
12297 scope
, template_header_p
);
12299 if (t
== error_mark_node
)
12300 return error_mark_node
;
12302 if (scope
!= ts_current
&& t
&& current_class_type
12303 && template_class_depth (current_class_type
)
12304 && template_header_p
)
12306 if (TREE_CODE (t
) == TEMPLATE_TEMPLATE_PARM
)
12309 /* Since SCOPE is not TS_CURRENT, we are not looking at a
12310 definition of this tag. Since, in addition, we are currently
12311 processing a (member) template declaration of a template
12312 class, we must be very careful; consider:
12319 { template <class V>
12320 friend struct S1; };
12322 Here, the S2::S1 declaration should not be confused with the
12323 outer declaration. In particular, the inner version should
12324 have a template parameter of level 2, not level 1. This
12325 would be particularly important if the member declaration
12328 template <class V = U> friend struct S1;
12330 say, when we should tsubst into `U' when instantiating
12331 S2. On the other hand, when presented with:
12341 we must find the inner binding eventually. We
12342 accomplish this by making sure that the new type we
12343 create to represent this declaration has the right
12345 context
= TYPE_CONTEXT (t
);
12351 /* If no such tag is yet defined, create a forward-reference node
12352 and record it as the "definition".
12353 When a real declaration of this type is found,
12354 the forward-reference will be altered into a real type. */
12355 if (code
== ENUMERAL_TYPE
)
12357 error ("use of enum %q#D without previous declaration", name
);
12358 return error_mark_node
;
12362 t
= make_class_type (code
);
12363 TYPE_CONTEXT (t
) = context
;
12364 if (orig_scope
== ts_lambda
)
12365 /* Remember that we're declaring a lambda to avoid bogus errors
12366 in push_template_decl. */
12367 CLASSTYPE_LAMBDA_EXPR (t
) = error_mark_node
;
12368 t
= pushtag (name
, t
, scope
);
12373 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
12375 if (!redeclare_class_template (t
, current_template_parms
))
12376 return error_mark_node
;
12378 else if (!processing_template_decl
12379 && CLASS_TYPE_P (t
)
12380 && CLASSTYPE_IS_TEMPLATE (t
))
12382 error ("redeclaration of %qT as a non-template", t
);
12383 error ("previous declaration %q+D", t
);
12384 return error_mark_node
;
12387 /* Make injected friend class visible. */
12388 if (scope
!= ts_within_enclosing_non_class
12389 && hidden_name_p (TYPE_NAME (t
)))
12391 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
12392 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
12394 if (TYPE_TEMPLATE_INFO (t
))
12396 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
12397 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
12405 /* Wrapper for xref_tag_1. */
12408 xref_tag (enum tag_types tag_code
, tree name
,
12409 tag_scope scope
, bool template_header_p
)
12413 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
12414 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
12415 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
12421 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
12423 enum tag_types tag_kind
;
12425 if (TREE_CODE (old
) == RECORD_TYPE
)
12426 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
12428 tag_kind
= union_type
;
12430 if (id
== NULL_TREE
)
12431 id
= TYPE_IDENTIFIER (old
);
12433 return xref_tag (tag_kind
, id
, scope
, false);
12436 /* Create the binfo hierarchy for REF with (possibly NULL) base list
12437 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
12438 access_* node, and the TREE_VALUE is the type of the base-class.
12439 Non-NULL TREE_TYPE indicates virtual inheritance.
12441 Returns true if the binfo hierarchy was successfully created,
12442 false if an error was detected. */
12445 xref_basetypes (tree ref
, tree base_list
)
12448 tree binfo
, base_binfo
;
12449 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
12450 unsigned max_bases
= 0; /* Maximum direct bases. */
12452 tree default_access
;
12453 tree igo_prev
; /* Track Inheritance Graph Order. */
12455 if (ref
== error_mark_node
)
12458 /* The base of a derived class is private by default, all others are
12460 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
12461 && CLASSTYPE_DECLARED_CLASS (ref
)
12462 ? access_private_node
: access_public_node
);
12464 /* First, make sure that any templates in base-classes are
12465 instantiated. This ensures that if we call ourselves recursively
12466 we do not get confused about which classes are marked and which
12468 basep
= &base_list
;
12471 tree basetype
= TREE_VALUE (*basep
);
12473 /* The dependent_type_p call below should really be dependent_scope_p
12474 so that we give a hard error about using an incomplete type as a
12475 base, but we allow it with a pedwarn for backward
12477 if (processing_template_decl
12478 && CLASS_TYPE_P (basetype
) && TYPE_BEING_DEFINED (basetype
))
12479 cxx_incomplete_type_diagnostic (NULL_TREE
, basetype
, DK_PEDWARN
);
12480 if (!dependent_type_p (basetype
)
12481 && !complete_type_or_else (basetype
, NULL
))
12482 /* An incomplete type. Remove it from the list. */
12483 *basep
= TREE_CHAIN (*basep
);
12487 if (TREE_TYPE (*basep
))
12489 if (CLASS_TYPE_P (basetype
))
12490 max_vbases
+= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype
));
12491 basep
= &TREE_CHAIN (*basep
);
12495 TYPE_MARKED_P (ref
) = 1;
12497 /* The binfo slot should be empty, unless this is an (ill-formed)
12499 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
12501 error ("redefinition of %q#T", ref
);
12505 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
12507 binfo
= make_tree_binfo (max_bases
);
12509 TYPE_BINFO (ref
) = binfo
;
12510 BINFO_OFFSET (binfo
) = size_zero_node
;
12511 BINFO_TYPE (binfo
) = ref
;
12513 /* Apply base-class info set up to the variants of this type. */
12514 fixup_type_variants (ref
);
12518 vec_alloc (BINFO_BASE_ACCESSES (binfo
), max_bases
);
12519 /* An aggregate cannot have baseclasses. */
12520 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
12522 if (TREE_CODE (ref
) == UNION_TYPE
)
12524 error ("derived union %qT invalid", ref
);
12531 if (TYPE_FOR_JAVA (ref
))
12533 error ("Java class %qT cannot have multiple bases", ref
);
12540 vec_alloc (CLASSTYPE_VBASECLASSES (ref
), max_vbases
);
12542 if (TYPE_FOR_JAVA (ref
))
12544 error ("Java class %qT cannot have virtual bases", ref
);
12549 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
12551 tree access
= TREE_PURPOSE (base_list
);
12552 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
12553 tree basetype
= TREE_VALUE (base_list
);
12555 if (access
== access_default_node
)
12556 access
= default_access
;
12558 if (PACK_EXPANSION_P (basetype
))
12559 basetype
= PACK_EXPANSION_PATTERN (basetype
);
12560 if (TREE_CODE (basetype
) == TYPE_DECL
)
12561 basetype
= TREE_TYPE (basetype
);
12562 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
12564 error ("base type %qT fails to be a struct or class type",
12569 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
12570 TYPE_FOR_JAVA (ref
) = 1;
12572 base_binfo
= NULL_TREE
;
12573 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
12575 base_binfo
= TYPE_BINFO (basetype
);
12576 /* The original basetype could have been a typedef'd type. */
12577 basetype
= BINFO_TYPE (base_binfo
);
12579 /* Inherit flags from the base. */
12580 TYPE_HAS_NEW_OPERATOR (ref
)
12581 |= TYPE_HAS_NEW_OPERATOR (basetype
);
12582 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
12583 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
12584 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12585 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
12586 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
12587 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
12588 CLASSTYPE_REPEATED_BASE_P (ref
)
12589 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
12592 /* We must do this test after we've seen through a typedef
12594 if (TYPE_MARKED_P (basetype
))
12596 if (basetype
== ref
)
12597 error ("recursive type %qT undefined", basetype
);
12599 error ("duplicate base type %qT invalid", basetype
);
12603 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
12604 /* Regenerate the pack expansion for the bases. */
12605 basetype
= make_pack_expansion (basetype
);
12607 TYPE_MARKED_P (basetype
) = 1;
12609 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
12610 &igo_prev
, via_virtual
);
12611 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
12612 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
12614 BINFO_BASE_APPEND (binfo
, base_binfo
);
12615 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
12618 if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
12619 /* If we didn't get max_vbases vbases, we must have shared at
12620 least one of them, and are therefore diamond shaped. */
12621 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
12623 /* Unmark all the types. */
12624 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12625 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12626 TYPE_MARKED_P (ref
) = 0;
12628 /* Now see if we have a repeated base type. */
12629 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
12631 for (base_binfo
= binfo
; base_binfo
;
12632 base_binfo
= TREE_CHAIN (base_binfo
))
12634 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12636 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
12639 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
12641 for (base_binfo
= binfo
; base_binfo
;
12642 base_binfo
= TREE_CHAIN (base_binfo
))
12643 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
12644 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
12653 /* Copies the enum-related properties from type SRC to type DST.
12654 Used with the underlying type of an enum and the enum itself. */
12656 copy_type_enum (tree dst
, tree src
)
12659 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
12661 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
12662 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
12663 TYPE_SIZE (t
) = TYPE_SIZE (src
);
12664 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
12665 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
12666 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
12667 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
12668 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
12669 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
12673 /* Begin compiling the definition of an enumeration type.
12676 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
12678 UNDERLYING_TYPE is the type that will be used as the storage for
12679 the enumeration type. This should be NULL_TREE if no storage type
12682 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12684 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12686 Returns the type object, as yet incomplete.
12687 Also records info about it so that build_enumerator
12688 may be used to declare the individual values as they are read. */
12691 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12692 bool scoped_enum_p
, bool *is_new
)
12694 tree prevtype
= NULL_TREE
;
12695 gcc_assert (identifier_p (name
));
12699 /* [C++0x dcl.enum]p5:
12701 If not explicitly specified, the underlying type of a scoped
12702 enumeration type is int. */
12703 if (!underlying_type
&& scoped_enum_p
)
12704 underlying_type
= integer_type_node
;
12706 if (underlying_type
)
12707 underlying_type
= cv_unqualified (underlying_type
);
12709 /* If this is the real definition for a previous forward reference,
12710 fill in the contents in the same object that used to be the
12711 forward reference. */
12713 enumtype
= lookup_and_check_tag (enum_type
, name
,
12714 /*tag_scope=*/ts_current
,
12715 /*template_header_p=*/false);
12717 /* In case of a template_decl, the only check that should be deferred
12718 to instantiation time is the comparison of underlying types. */
12719 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12721 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12723 error_at (input_location
, "scoped/unscoped mismatch "
12724 "in enum %q#T", enumtype
);
12725 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12726 "previous definition here");
12727 enumtype
= error_mark_node
;
12729 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12731 error_at (input_location
, "underlying type mismatch "
12732 "in enum %q#T", enumtype
);
12733 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12734 "previous definition here");
12735 enumtype
= error_mark_node
;
12737 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12738 && !dependent_type_p (underlying_type
)
12739 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12740 && !same_type_p (underlying_type
,
12741 ENUM_UNDERLYING_TYPE (enumtype
)))
12743 error_at (input_location
, "different underlying type "
12744 "in enum %q#T", enumtype
);
12745 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12746 "previous definition here");
12747 underlying_type
= NULL_TREE
;
12751 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12752 || processing_template_decl
)
12754 /* In case of error, make a dummy enum to allow parsing to
12756 if (enumtype
== error_mark_node
)
12758 name
= make_anon_name ();
12759 enumtype
= NULL_TREE
;
12762 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12763 of an opaque enum, or an opaque enum of an already defined
12764 enumeration (C++0x only).
12765 In any other case, it'll be NULL_TREE. */
12771 prevtype
= enumtype
;
12773 /* Do not push the decl more than once, unless we need to
12774 compare underlying types at instantiation time */
12776 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12777 || (underlying_type
12778 && dependent_type_p (underlying_type
))
12779 || (ENUM_UNDERLYING_TYPE (enumtype
)
12780 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12782 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12783 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12786 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12789 if (enumtype
== error_mark_node
)
12790 return error_mark_node
;
12792 /* The enum is considered opaque until the opening '{' of the
12793 enumerator list. */
12794 SET_OPAQUE_ENUM_P (enumtype
, true);
12795 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12798 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12800 if (underlying_type
)
12802 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12804 copy_type_enum (enumtype
, underlying_type
);
12805 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12807 else if (dependent_type_p (underlying_type
))
12808 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12810 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12811 underlying_type
, enumtype
);
12814 /* If into a template class, the returned enum is always the first
12815 declaration (opaque or not) seen. This way all the references to
12816 this type will be to the same declaration. The following ones are used
12817 only to check for definition errors. */
12818 if (prevtype
&& processing_template_decl
)
12824 /* After processing and defining all the values of an enumeration type,
12825 install their decls in the enumeration type.
12826 ENUMTYPE is the type object. */
12829 finish_enum_value_list (tree enumtype
)
12832 tree underlying_type
;
12835 tree minnode
, maxnode
;
12838 bool fixed_underlying_type_p
12839 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12841 /* We built up the VALUES in reverse order. */
12842 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12844 /* For an enum defined in a template, just set the type of the values;
12845 all further processing is postponed until the template is
12846 instantiated. We need to set the type so that tsubst of a CONST_DECL
12848 if (processing_template_decl
)
12850 for (values
= TYPE_VALUES (enumtype
);
12852 values
= TREE_CHAIN (values
))
12853 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12857 /* Determine the minimum and maximum values of the enumerators. */
12858 if (TYPE_VALUES (enumtype
))
12860 minnode
= maxnode
= NULL_TREE
;
12862 for (values
= TYPE_VALUES (enumtype
);
12864 values
= TREE_CHAIN (values
))
12866 decl
= TREE_VALUE (values
);
12868 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12869 each enumerator has the type of its enumeration. Prior to the
12870 closing brace, the type of each enumerator is the type of its
12871 initializing value. */
12872 TREE_TYPE (decl
) = enumtype
;
12874 /* Update the minimum and maximum values, if appropriate. */
12875 value
= DECL_INITIAL (decl
);
12876 if (value
== error_mark_node
)
12877 value
= integer_zero_node
;
12878 /* Figure out what the minimum and maximum values of the
12879 enumerators are. */
12881 minnode
= maxnode
= value
;
12882 else if (tree_int_cst_lt (maxnode
, value
))
12884 else if (tree_int_cst_lt (value
, minnode
))
12891 If the enumerator-list is empty, the underlying type is as if
12892 the enumeration had a single enumerator with value 0. */
12893 minnode
= maxnode
= integer_zero_node
;
12895 if (!fixed_underlying_type_p
)
12897 /* Compute the number of bits require to represent all values of the
12898 enumeration. We must do this before the type of MINNODE and
12899 MAXNODE are transformed, since tree_int_cst_min_precision relies
12900 on the TREE_TYPE of the value it is passed. */
12901 signop sgn
= tree_int_cst_sgn (minnode
) >= 0 ? UNSIGNED
: SIGNED
;
12902 int lowprec
= tree_int_cst_min_precision (minnode
, sgn
);
12903 int highprec
= tree_int_cst_min_precision (maxnode
, sgn
);
12904 int precision
= MAX (lowprec
, highprec
);
12906 bool use_short_enum
;
12908 /* Determine the underlying type of the enumeration.
12912 The underlying type of an enumeration is an integral type that
12913 can represent all the enumerator values defined in the
12914 enumeration. It is implementation-defined which integral type is
12915 used as the underlying type for an enumeration except that the
12916 underlying type shall not be larger than int unless the value of
12917 an enumerator cannot fit in an int or unsigned int.
12919 We use "int" or an "unsigned int" as the underlying type, even if
12920 a smaller integral type would work, unless the user has
12921 explicitly requested that we use the smallest possible type. The
12922 user can request that for all enumerations with a command line
12923 flag, or for just one enumeration with an attribute. */
12925 use_short_enum
= flag_short_enums
12926 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12928 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12932 underlying_type
= integer_types
[itk
];
12933 if (underlying_type
!= NULL_TREE
12934 && TYPE_PRECISION (underlying_type
) >= precision
12935 && TYPE_SIGN (underlying_type
) == sgn
)
12938 if (itk
== itk_none
)
12942 IF no integral type can represent all the enumerator values, the
12943 enumeration is ill-formed. */
12944 error ("no integral type can represent all of the enumerator values "
12945 "for %qT", enumtype
);
12946 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12947 underlying_type
= integer_types
[itk_unsigned_long_long
];
12952 The value of sizeof() applied to an enumeration type, an object
12953 of an enumeration type, or an enumerator, is the value of sizeof()
12954 applied to the underlying type. */
12955 copy_type_enum (enumtype
, underlying_type
);
12957 /* Compute the minimum and maximum values for the type.
12961 For an enumeration where emin is the smallest enumerator and emax
12962 is the largest, the values of the enumeration are the values of the
12963 underlying type in the range bmin to bmax, where bmin and bmax are,
12964 respectively, the smallest and largest values of the smallest bit-
12965 field that can store emin and emax. */
12967 /* The middle-end currently assumes that types with TYPE_PRECISION
12968 narrower than their underlying type are suitably zero or sign
12969 extended to fill their mode. Similarly, it assumes that the front
12970 end assures that a value of a particular type must be within
12971 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12973 We used to set these fields based on bmin and bmax, but that led
12974 to invalid assumptions like optimizing away bounds checking. So
12975 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12976 TYPE_MAX_VALUE to the values for the mode above and only restrict
12977 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12978 ENUM_UNDERLYING_TYPE (enumtype
)
12979 = build_distinct_type_copy (underlying_type
);
12980 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12981 set_min_and_max_values_for_integral_type
12982 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, sgn
);
12984 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12985 if (flag_strict_enums
)
12986 set_min_and_max_values_for_integral_type (enumtype
, precision
, sgn
);
12989 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12991 /* Convert each of the enumerators to the type of the underlying
12992 type of the enumeration. */
12993 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12995 location_t saved_location
;
12997 decl
= TREE_VALUE (values
);
12998 saved_location
= input_location
;
12999 input_location
= DECL_SOURCE_LOCATION (decl
);
13000 if (fixed_underlying_type_p
)
13001 /* If the enumeration type has a fixed underlying type, we
13002 already checked all of the enumerator values. */
13003 value
= DECL_INITIAL (decl
);
13005 value
= perform_implicit_conversion (underlying_type
,
13006 DECL_INITIAL (decl
),
13007 tf_warning_or_error
);
13008 input_location
= saved_location
;
13010 /* Do not clobber shared ints. */
13011 value
= copy_node (value
);
13013 TREE_TYPE (value
) = enumtype
;
13014 DECL_INITIAL (decl
) = value
;
13017 /* Fix up all variant types of this enum type. */
13018 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
13019 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
13021 if (at_class_scope_p ()
13022 && COMPLETE_TYPE_P (current_class_type
)
13023 && UNSCOPED_ENUM_P (enumtype
))
13024 insert_late_enum_def_into_classtype_sorted_fields (enumtype
,
13025 current_class_type
);
13027 /* Finish debugging output for this type. */
13028 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
13031 /* Finishes the enum type. This is called only the first time an
13032 enumeration is seen, be it opaque or odinary.
13033 ENUMTYPE is the type object. */
13036 finish_enum (tree enumtype
)
13038 if (processing_template_decl
)
13040 if (at_function_scope_p ())
13041 add_stmt (build_min (TAG_DEFN
, enumtype
));
13045 /* If this is a forward declaration, there should not be any variants,
13046 though we can get a variant in the middle of an enum-specifier with
13047 wacky code like 'enum E { e = sizeof(const E*) };' */
13048 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
13049 && (TYPE_VALUES (enumtype
)
13050 || !TYPE_NEXT_VARIANT (enumtype
)));
13053 /* Build and install a CONST_DECL for an enumeration constant of the
13054 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13055 Apply ATTRIBUTES if available. LOC is the location of NAME.
13056 Assignment of sequential values by default is handled here. */
13059 build_enumerator (tree name
, tree value
, tree enumtype
, tree attributes
,
13066 /* scalar_constant_value will pull out this expression, so make sure
13067 it's folded as appropriate. */
13068 if (processing_template_decl
)
13069 value
= fold_non_dependent_expr (value
);
13071 /* If the VALUE was erroneous, pretend it wasn't there; that will
13072 result in the enum being assigned the next value in sequence. */
13073 if (value
== error_mark_node
)
13076 /* Remove no-op casts from the value. */
13078 STRIP_TYPE_NOPS (value
);
13080 if (! processing_template_decl
)
13082 /* Validate and default VALUE. */
13083 if (value
!= NULL_TREE
)
13085 if (!ENUM_UNDERLYING_TYPE (enumtype
))
13087 tree tmp_value
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
,
13092 else if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
13093 (TREE_TYPE (value
)))
13094 value
= perform_implicit_conversion_flags
13095 (ENUM_UNDERLYING_TYPE (enumtype
), value
, tf_warning_or_error
,
13096 LOOKUP_IMPLICIT
| LOOKUP_NO_NARROWING
);
13098 if (value
== error_mark_node
)
13101 if (value
!= NULL_TREE
)
13103 value
= cxx_constant_value (value
);
13105 if (TREE_CODE (value
) != INTEGER_CST
13106 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
13108 error ("enumerator value for %qD is not an integer constant",
13115 /* Default based on previous value. */
13116 if (value
== NULL_TREE
)
13118 if (TYPE_VALUES (enumtype
))
13123 /* C++03 7.2/4: If no initializer is specified for the first
13124 enumerator, the type is an unspecified integral
13125 type. Otherwise the type is the same as the type of the
13126 initializing value of the preceding enumerator unless the
13127 incremented value is not representable in that type, in
13128 which case the type is an unspecified integral type
13129 sufficient to contain the incremented value. */
13130 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
13131 if (error_operand_p (prev_value
))
13132 value
= error_mark_node
;
13135 tree type
= TREE_TYPE (prev_value
);
13136 signop sgn
= TYPE_SIGN (type
);
13137 widest_int wi
= wi::add (wi::to_widest (prev_value
), 1, sgn
,
13141 bool pos
= !wi::neg_p (wi
, sgn
);
13142 if (!wi::fits_to_tree_p (wi
, type
))
13145 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
13147 type
= integer_types
[itk
];
13148 if (type
!= NULL_TREE
13149 && (pos
|| !TYPE_UNSIGNED (type
))
13150 && wi::fits_to_tree_p (wi
, type
))
13153 if (type
&& cxx_dialect
< cxx11
13154 && itk
> itk_unsigned_long
)
13155 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
13156 incremented enumerator value is too large for %<unsigned long%>" : "\
13157 incremented enumerator value is too large for %<long%>");
13159 if (type
== NULL_TREE
)
13162 value
= wide_int_to_tree (type
, wi
);
13167 error ("overflow in enumeration values at %qD", name
);
13168 value
= error_mark_node
;
13173 value
= integer_zero_node
;
13176 /* Remove no-op casts from the value. */
13177 STRIP_TYPE_NOPS (value
);
13179 /* If the underlying type of the enum is fixed, check whether
13180 the enumerator values fits in the underlying type. If it
13181 does not fit, the program is ill-formed [C++0x dcl.enum]. */
13182 if (ENUM_UNDERLYING_TYPE (enumtype
)
13184 && TREE_CODE (value
) == INTEGER_CST
)
13186 if (!int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
13187 error ("enumerator value %E is outside the range of underlying "
13188 "type %<%T%>", value
, ENUM_UNDERLYING_TYPE (enumtype
));
13190 /* Convert the value to the appropriate type. */
13191 value
= convert (ENUM_UNDERLYING_TYPE (enumtype
), value
);
13195 /* C++ associates enums with global, function, or class declarations. */
13196 context
= current_scope ();
13198 /* Build the actual enumeration constant. Note that the enumeration
13199 constants have the underlying type of the enum (if it is fixed)
13200 or the type of their initializer (if the underlying type of the
13201 enum is not fixed):
13205 If the underlying type is fixed, the type of each enumerator
13206 prior to the closing brace is the underlying type; if the
13207 initializing value of an enumerator cannot be represented by
13208 the underlying type, the program is ill-formed. If the
13209 underlying type is not fixed, the type of each enumerator is
13210 the type of its initializing value.
13212 If the underlying type is not fixed, it will be computed by
13213 finish_enum and we will reset the type of this enumerator. Of
13214 course, if we're processing a template, there may be no value. */
13215 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
13217 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
13219 DECL_CONTEXT (decl
) = enumtype
;
13220 TREE_CONSTANT (decl
) = 1;
13221 TREE_READONLY (decl
) = 1;
13222 DECL_INITIAL (decl
) = value
;
13225 cplus_decl_attributes (&decl
, attributes
, 0);
13227 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
13228 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13229 on the TYPE_FIELDS list for `S'. (That's so that you can say
13230 things like `S::i' later.) */
13231 finish_member_declaration (decl
);
13235 /* Add this enumeration constant to the list for this type. */
13236 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
13239 /* Look for an enumerator with the given NAME within the enumeration
13240 type ENUMTYPE. This routine is used primarily for qualified name
13241 lookup into an enumerator in C++0x, e.g.,
13243 enum class Color { Red, Green, Blue };
13245 Color color = Color::Red;
13247 Returns the value corresponding to the enumerator, or
13248 NULL_TREE if no such enumerator was found. */
13250 lookup_enumerator (tree enumtype
, tree name
)
13253 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
13255 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
13256 return e
? TREE_VALUE (e
) : NULL_TREE
;
13260 /* We're defining DECL. Make sure that its type is OK. */
13263 check_function_type (tree decl
, tree current_function_parms
)
13265 tree fntype
= TREE_TYPE (decl
);
13266 tree return_type
= complete_type (TREE_TYPE (fntype
));
13268 /* In a function definition, arg types must be complete. */
13269 require_complete_types_for_parms (current_function_parms
);
13271 if (dependent_type_p (return_type
)
13272 || type_uses_auto (return_type
))
13274 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
13275 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
13277 tree args
= TYPE_ARG_TYPES (fntype
);
13279 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
13280 error ("return type %q#T is incomplete", return_type
);
13282 error ("return type has Java class type %q#T", return_type
);
13284 /* Make it return void instead. */
13285 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13286 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
13288 TREE_CHAIN (args
));
13290 fntype
= build_function_type (void_type_node
, args
);
13292 = build_exception_variant (fntype
,
13293 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
13294 fntype
= (cp_build_type_attribute_variant
13295 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
13296 TREE_TYPE (decl
) = fntype
;
13299 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
13302 /* Create the FUNCTION_DECL for a function definition.
13303 DECLSPECS and DECLARATOR are the parts of the declaration;
13304 they describe the function's name and the type it returns,
13305 but twisted together in a fashion that parallels the syntax of C.
13307 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13308 DECLARATOR is really the DECL for the function we are about to
13309 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13310 indicating that the function is an inline defined in-class.
13312 This function creates a binding context for the function body
13313 as well as setting up the FUNCTION_DECL in current_function_decl.
13315 For C++, we must first check whether that datum makes any sense.
13316 For example, "class A local_a(1,2);" means that variable local_a
13317 is an aggregate of type A, which should have a constructor
13318 applied to it with the argument list [1, 2].
13320 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
13321 or may be a BLOCK if the function has been defined previously
13322 in this translation unit. On exit, DECL_INITIAL (decl1) will be
13323 error_mark_node if the function has never been defined, or
13324 a BLOCK if the function has been defined somewhere. */
13327 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
13329 tree ctype
= NULL_TREE
;
13332 int doing_friend
= 0;
13333 cp_binding_level
*bl
;
13334 tree current_function_parms
;
13335 struct c_fileinfo
*finfo
13336 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
13337 bool honor_interface
;
13339 /* Sanity check. */
13340 gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node
)));
13341 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
13343 fntype
= TREE_TYPE (decl1
);
13344 if (TREE_CODE (fntype
) == METHOD_TYPE
)
13345 ctype
= TYPE_METHOD_BASETYPE (fntype
);
13347 /* ISO C++ 11.4/5. A friend function defined in a class is in
13348 the (lexical) scope of the class in which it is defined. */
13349 if (!ctype
&& DECL_FRIEND_P (decl1
))
13351 ctype
= DECL_FRIEND_CONTEXT (decl1
);
13353 /* CTYPE could be null here if we're dealing with a template;
13354 for example, `inline friend float foo()' inside a template
13355 will have no CTYPE set. */
13356 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
13362 if (DECL_DECLARED_INLINE_P (decl1
)
13363 && lookup_attribute ("noinline", attrs
))
13364 warning (0, "inline function %q+D given attribute noinline", decl1
);
13366 /* Handle gnu_inline attribute. */
13367 if (GNU_INLINE_P (decl1
))
13369 DECL_EXTERNAL (decl1
) = 1;
13370 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13371 DECL_INTERFACE_KNOWN (decl1
) = 1;
13372 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
13375 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
13376 /* This is a constructor, we must ensure that any default args
13377 introduced by this definition are propagated to the clones
13378 now. The clones are used directly in overload resolution. */
13379 adjust_clone_args (decl1
);
13381 /* Sometimes we don't notice that a function is a static member, and
13382 build a METHOD_TYPE for it. Fix that up now. */
13383 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
13384 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
13386 /* Set up current_class_type, and enter the scope of the class, if
13389 push_nested_class (ctype
);
13390 else if (DECL_STATIC_FUNCTION_P (decl1
))
13391 push_nested_class (DECL_CONTEXT (decl1
));
13393 /* Now that we have entered the scope of the class, we must restore
13394 the bindings for any template parameters surrounding DECL1, if it
13395 is an inline member template. (Order is important; consider the
13396 case where a template parameter has the same name as a field of
13397 the class.) It is not until after this point that
13398 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13399 if (flags
& SF_INCLASS_INLINE
)
13400 maybe_begin_member_template_processing (decl1
);
13402 /* Effective C++ rule 15. */
13404 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
13405 && VOID_TYPE_P (TREE_TYPE (fntype
)))
13406 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
13408 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13409 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13410 if (!DECL_INITIAL (decl1
))
13411 DECL_INITIAL (decl1
) = error_mark_node
;
13413 /* This function exists in static storage.
13414 (This does not mean `static' in the C sense!) */
13415 TREE_STATIC (decl1
) = 1;
13417 /* We must call push_template_decl after current_class_type is set
13418 up. (If we are processing inline definitions after exiting a
13419 class scope, current_class_type will be NULL_TREE until set above
13420 by push_nested_class.) */
13421 if (processing_template_decl
)
13423 tree newdecl1
= push_template_decl (decl1
);
13424 if (newdecl1
== error_mark_node
)
13426 if (ctype
|| DECL_STATIC_FUNCTION_P (decl1
))
13427 pop_nested_class ();
13433 /* We are now in the scope of the function being defined. */
13434 current_function_decl
= decl1
;
13436 /* Save the parm names or decls from this function's declarator
13437 where store_parm_decls will find them. */
13438 current_function_parms
= DECL_ARGUMENTS (decl1
);
13440 /* Make sure the parameter and return types are reasonable. When
13441 you declare a function, these types can be incomplete, but they
13442 must be complete when you define the function. */
13443 check_function_type (decl1
, current_function_parms
);
13445 /* Build the return declaration for the function. */
13446 restype
= TREE_TYPE (fntype
);
13448 if (DECL_RESULT (decl1
) == NULL_TREE
)
13452 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
13453 DECL_ARTIFICIAL (resdecl
) = 1;
13454 DECL_IGNORED_P (resdecl
) = 1;
13455 DECL_RESULT (decl1
) = resdecl
;
13457 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
13460 /* Let the user know we're compiling this function. */
13461 announce_function (decl1
);
13463 /* Record the decl so that the function name is defined.
13464 If we already have a decl for this name, and it is a FUNCTION_DECL,
13465 use the old decl. */
13466 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
13468 /* A specialization is not used to guide overload resolution. */
13469 if (!DECL_FUNCTION_MEMBER_P (decl1
)
13470 && !(DECL_USE_TEMPLATE (decl1
) &&
13471 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
13473 tree olddecl
= pushdecl (decl1
);
13475 if (olddecl
== error_mark_node
)
13476 /* If something went wrong when registering the declaration,
13477 use DECL1; we have to have a FUNCTION_DECL to use when
13478 parsing the body of the function. */
13482 /* Otherwise, OLDDECL is either a previous declaration
13483 of the same function or DECL1 itself. */
13485 if (warn_missing_declarations
13486 && olddecl
== decl1
13487 && !DECL_MAIN_P (decl1
)
13488 && TREE_PUBLIC (decl1
)
13489 && !DECL_DECLARED_INLINE_P (decl1
))
13493 /* Check whether DECL1 is in an anonymous
13495 for (context
= DECL_CONTEXT (decl1
);
13497 context
= DECL_CONTEXT (context
))
13499 if (TREE_CODE (context
) == NAMESPACE_DECL
13500 && DECL_NAME (context
) == NULL_TREE
)
13504 if (context
== NULL
)
13505 warning (OPT_Wmissing_declarations
,
13506 "no previous declaration for %q+D", decl1
);
13514 /* We need to set the DECL_CONTEXT. */
13515 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
13516 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
13518 fntype
= TREE_TYPE (decl1
);
13519 restype
= TREE_TYPE (fntype
);
13521 /* If #pragma weak applies, mark the decl appropriately now.
13522 The pragma only applies to global functions. Because
13523 determining whether or not the #pragma applies involves
13524 computing the mangled name for the declaration, we cannot
13525 apply the pragma until after we have merged this declaration
13526 with any previous declarations; if the original declaration
13527 has a linkage specification, that specification applies to
13528 the definition as well, and may affect the mangled name. */
13529 if (DECL_FILE_SCOPE_P (decl1
))
13530 maybe_apply_pragma_weak (decl1
);
13533 /* Reset this in case the call to pushdecl changed it. */
13534 current_function_decl
= decl1
;
13536 gcc_assert (DECL_INITIAL (decl1
));
13538 /* This function may already have been parsed, in which case just
13539 return; our caller will skip over the body without parsing. */
13540 if (DECL_INITIAL (decl1
) != error_mark_node
)
13543 /* Initialize RTL machinery. We cannot do this until
13544 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13545 even when processing a template; this is how we get
13546 CFUN set up, and our per-function variables initialized.
13547 FIXME factor out the non-RTL stuff. */
13548 bl
= current_binding_level
;
13549 allocate_struct_function (decl1
, processing_template_decl
);
13551 /* Initialize the language data structures. Whenever we start
13552 a new function, we destroy temporaries in the usual way. */
13553 cfun
->language
= ggc_cleared_alloc
<language_function
> ();
13554 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
13555 current_binding_level
= bl
;
13557 if (!processing_template_decl
&& type_uses_auto (restype
))
13559 FNDECL_USED_AUTO (decl1
) = true;
13560 current_function_auto_return_pattern
= restype
;
13563 /* Start the statement-tree, start the tree now. */
13564 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
13566 /* If we are (erroneously) defining a function that we have already
13567 defined before, wipe out what we knew before. */
13568 if (!DECL_PENDING_INLINE_P (decl1
))
13569 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
13571 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
13573 /* We know that this was set up by `grokclassfn'. We do not
13574 wait until `store_parm_decls', since evil parse errors may
13575 never get us to that point. Here we keep the consistency
13576 between `current_class_type' and `current_class_ptr'. */
13577 tree t
= DECL_ARGUMENTS (decl1
);
13579 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
13580 gcc_assert (TYPE_PTR_P (TREE_TYPE (t
)));
13582 cp_function_chain
->x_current_class_ref
13583 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
13584 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
13585 cp_function_chain
->x_current_class_ptr
= t
;
13587 /* Constructors and destructors need to know whether they're "in
13588 charge" of initializing virtual base classes. */
13589 t
= DECL_CHAIN (t
);
13590 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
13592 current_in_charge_parm
= t
;
13593 t
= DECL_CHAIN (t
);
13595 if (DECL_HAS_VTT_PARM_P (decl1
))
13597 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
13598 current_vtt_parm
= t
;
13602 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
13603 /* Implicitly-defined methods (like the
13604 destructor for a class in which no destructor
13605 is explicitly declared) must not be defined
13606 until their definition is needed. So, we
13607 ignore interface specifications for
13608 compiler-generated functions. */
13609 && !DECL_ARTIFICIAL (decl1
));
13611 if (processing_template_decl
)
13612 /* Don't mess with interface flags. */;
13613 else if (DECL_INTERFACE_KNOWN (decl1
))
13615 tree ctx
= decl_function_context (decl1
);
13617 if (DECL_NOT_REALLY_EXTERN (decl1
))
13618 DECL_EXTERNAL (decl1
) = 0;
13620 if (ctx
!= NULL_TREE
&& vague_linkage_p (ctx
))
13621 /* This is a function in a local class in an extern inline
13622 or template function. */
13623 comdat_linkage (decl1
);
13625 /* If this function belongs to an interface, it is public.
13626 If it belongs to someone else's interface, it is also external.
13627 This only affects inlines and template instantiations. */
13628 else if (!finfo
->interface_unknown
&& honor_interface
)
13630 if (DECL_DECLARED_INLINE_P (decl1
)
13631 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13633 DECL_EXTERNAL (decl1
)
13634 = (finfo
->interface_only
13635 || (DECL_DECLARED_INLINE_P (decl1
)
13636 && ! flag_implement_inlines
13637 && !DECL_VINDEX (decl1
)));
13639 /* For WIN32 we also want to put these in linkonce sections. */
13640 maybe_make_one_only (decl1
);
13643 DECL_EXTERNAL (decl1
) = 0;
13644 DECL_INTERFACE_KNOWN (decl1
) = 1;
13645 /* If this function is in an interface implemented in this file,
13646 make sure that the back end knows to emit this function
13648 if (!DECL_EXTERNAL (decl1
))
13649 mark_needed (decl1
);
13651 else if (finfo
->interface_unknown
&& finfo
->interface_only
13652 && honor_interface
)
13654 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13655 interface, we will have both finfo->interface_unknown and
13656 finfo->interface_only set. In that case, we don't want to
13657 use the normal heuristics because someone will supply a
13658 #pragma implementation elsewhere, and deducing it here would
13659 produce a conflict. */
13660 comdat_linkage (decl1
);
13661 DECL_EXTERNAL (decl1
) = 0;
13662 DECL_INTERFACE_KNOWN (decl1
) = 1;
13663 DECL_DEFER_OUTPUT (decl1
) = 1;
13667 /* This is a definition, not a reference.
13668 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
13669 if (!GNU_INLINE_P (decl1
))
13670 DECL_EXTERNAL (decl1
) = 0;
13672 if ((DECL_DECLARED_INLINE_P (decl1
)
13673 || DECL_TEMPLATE_INSTANTIATION (decl1
))
13674 && ! DECL_INTERFACE_KNOWN (decl1
))
13675 DECL_DEFER_OUTPUT (decl1
) = 1;
13677 DECL_INTERFACE_KNOWN (decl1
) = 1;
13680 /* Determine the ELF visibility attribute for the function. We must not
13681 do this before calling "pushdecl", as we must allow "duplicate_decls"
13682 to merge any attributes appropriately. We also need to wait until
13684 if (!DECL_CLONED_FUNCTION_P (decl1
))
13685 determine_visibility (decl1
);
13687 if (!processing_template_decl
)
13688 maybe_instantiate_noexcept (decl1
);
13690 begin_scope (sk_function_parms
, decl1
);
13694 if (DECL_DESTRUCTOR_P (decl1
)
13695 || (DECL_CONSTRUCTOR_P (decl1
)
13696 && targetm
.cxx
.cdtor_returns_this ()))
13698 cdtor_label
= create_artificial_label (input_location
);
13701 start_fname_decls ();
13703 store_parm_decls (current_function_parms
);
13705 if (!processing_template_decl
13706 && flag_lifetime_dse
&& DECL_CONSTRUCTOR_P (decl1
))
13708 /* Insert a clobber to let the back end know that the object storage
13709 is dead when we enter the constructor. */
13710 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13711 tree clobber
= build_constructor (btype
, NULL
);
13712 TREE_THIS_VOLATILE (clobber
) = true;
13713 tree bref
= build_nop (build_reference_type (btype
), current_class_ptr
);
13714 bref
= convert_from_reference (bref
);
13715 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13716 finish_expr_stmt (exprstmt
);
13723 /* Like start_preparsed_function, except that instead of a
13724 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
13726 Returns true on success. If the DECLARATOR is not suitable
13727 for a function, we return false, which tells the parser to
13728 skip the entire function. */
13731 start_function (cp_decl_specifier_seq
*declspecs
,
13732 const cp_declarator
*declarator
,
13737 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13738 invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION
, decl1
);
13739 if (decl1
== error_mark_node
)
13741 /* If the declarator is not suitable for a function definition,
13742 cause a syntax error. */
13743 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13745 error ("invalid function declaration");
13749 if (DECL_MAIN_P (decl1
))
13750 /* main must return int. grokfndecl should have corrected it
13751 (and issued a diagnostic) if the user got it wrong. */
13752 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13753 integer_type_node
));
13755 return start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13758 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13762 use_eh_spec_block (tree fn
)
13764 return (flag_exceptions
&& flag_enforce_eh_specs
13765 && !processing_template_decl
13766 && !type_throw_all_p (TREE_TYPE (fn
))
13767 /* We insert the EH_SPEC_BLOCK only in the original
13768 function; then, it is copied automatically to the
13770 && !DECL_CLONED_FUNCTION_P (fn
)
13771 /* Implicitly-generated constructors and destructors have
13772 exception specifications. However, those specifications
13773 are the union of the possible exceptions specified by the
13774 constructors/destructors for bases and members, so no
13775 unallowed exception will ever reach this function. By
13776 not creating the EH_SPEC_BLOCK we save a little memory,
13777 and we avoid spurious warnings about unreachable
13779 && !DECL_DEFAULTED_FN (fn
));
13782 /* Store the parameter declarations into the current function declaration.
13783 This is called after parsing the parameter declarations, before
13784 digesting the body of the function.
13786 Also install to binding contour return value identifier, if any. */
13789 store_parm_decls (tree current_function_parms
)
13791 tree fndecl
= current_function_decl
;
13794 /* This is a chain of any other decls that came in among the parm
13795 declarations. If a parm is declared with enum {foo, bar} x;
13796 then CONST_DECLs for foo and bar are put here. */
13797 tree nonparms
= NULL_TREE
;
13799 if (current_function_parms
)
13801 /* This case is when the function was defined with an ANSI prototype.
13802 The parms already have decls, so we need not do anything here
13803 except record them as in effect
13804 and complain if any redundant old-style parm decls were written. */
13806 tree specparms
= current_function_parms
;
13809 /* Must clear this because it might contain TYPE_DECLs declared
13811 current_binding_level
->names
= NULL
;
13813 /* If we're doing semantic analysis, then we'll call pushdecl
13814 for each of these. We must do them in reverse order so that
13815 they end in the correct forward order. */
13816 specparms
= nreverse (specparms
);
13818 for (parm
= specparms
; parm
; parm
= next
)
13820 next
= DECL_CHAIN (parm
);
13821 if (TREE_CODE (parm
) == PARM_DECL
)
13823 if (DECL_NAME (parm
) == NULL_TREE
13824 || !VOID_TYPE_P (parm
))
13827 error ("parameter %qD declared void", parm
);
13831 /* If we find an enum constant or a type tag,
13832 put it aside for the moment. */
13833 TREE_CHAIN (parm
) = NULL_TREE
;
13834 nonparms
= chainon (nonparms
, parm
);
13838 /* Get the decls in their original chain order and record in the
13839 function. This is all and only the PARM_DECLs that were
13840 pushed into scope by the loop above. */
13841 DECL_ARGUMENTS (fndecl
) = getdecls ();
13844 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13846 /* Now store the final chain of decls for the arguments
13847 as the decl-chain of the current lexical scope.
13848 Put the enumerators in as well, at the front so that
13849 DECL_ARGUMENTS is not modified. */
13850 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13852 if (use_eh_spec_block (current_function_decl
))
13853 current_eh_spec_block
= begin_eh_spec_block ();
13857 /* We have finished doing semantic analysis on DECL, but have not yet
13858 generated RTL for its body. Save away our current state, so that
13859 when we want to generate RTL later we know what to do. */
13862 save_function_data (tree decl
)
13864 struct language_function
*f
;
13866 /* Save the language-specific per-function data so that we can
13867 get it back when we really expand this function. */
13868 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13871 f
= ggc_alloc
<language_function
> ();
13872 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13873 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13875 /* Clear out the bits we don't need. */
13876 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13877 f
->bindings
= NULL
;
13878 f
->x_local_names
= NULL
;
13879 f
->base
.local_typedefs
= NULL
;
13883 /* Set the return value of the constructor (if present). */
13886 finish_constructor_body (void)
13891 if (targetm
.cxx
.cdtor_returns_this ()
13892 && (! TYPE_FOR_JAVA (current_class_type
)))
13894 /* Any return from a constructor will end up here. */
13895 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13897 val
= DECL_ARGUMENTS (current_function_decl
);
13898 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13899 DECL_RESULT (current_function_decl
), val
);
13900 /* Return the address of the object. */
13901 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13902 add_stmt (exprstmt
);
13906 /* Do all the processing for the beginning of a destructor; set up the
13907 vtable pointers and cleanups for bases and members. */
13910 begin_destructor_body (void)
13912 tree compound_stmt
;
13914 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13915 issued an error message. We still want to try to process the
13916 body of the function, but initialize_vtbl_ptrs will crash if
13917 TYPE_BINFO is NULL. */
13918 if (COMPLETE_TYPE_P (current_class_type
))
13920 compound_stmt
= begin_compound_stmt (0);
13921 /* Make all virtual function table pointers in non-virtual base
13922 classes point to CURRENT_CLASS_TYPE's virtual function
13924 initialize_vtbl_ptrs (current_class_ptr
);
13925 finish_compound_stmt (compound_stmt
);
13927 if (flag_lifetime_dse
)
13929 /* Insert a cleanup to let the back end know that the object is dead
13930 when we exit the destructor, either normally or via exception. */
13931 tree btype
= CLASSTYPE_AS_BASE (current_class_type
);
13932 tree clobber
= build_constructor (btype
, NULL
);
13933 TREE_THIS_VOLATILE (clobber
) = true;
13934 tree bref
= build_nop (build_reference_type (btype
),
13935 current_class_ptr
);
13936 bref
= convert_from_reference (bref
);
13937 tree exprstmt
= build2 (MODIFY_EXPR
, btype
, bref
, clobber
);
13938 finish_decl_cleanup (NULL_TREE
, exprstmt
);
13941 /* And insert cleanups for our bases and members so that they
13942 will be properly destroyed if we throw. */
13943 push_base_cleanups ();
13947 /* At the end of every destructor we generate code to delete the object if
13948 necessary. Do that now. */
13951 finish_destructor_body (void)
13955 /* Any return from a destructor will end up here; that way all base
13956 and member cleanups will be run when the function returns. */
13957 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13959 /* In a virtual destructor, we must call delete. */
13960 if (DECL_VIRTUAL_P (current_function_decl
))
13963 tree virtual_size
= cxx_sizeof (current_class_type
);
13967 At the point of definition of a virtual destructor (including
13968 an implicit definition), non-placement operator delete shall
13969 be looked up in the scope of the destructor's class and if
13970 found shall be accessible and unambiguous. */
13971 exprstmt
= build_op_delete_call (DELETE_EXPR
, current_class_ptr
,
13973 /*global_p=*/false,
13974 /*placement=*/NULL_TREE
,
13975 /*alloc_fn=*/NULL_TREE
,
13976 tf_warning_or_error
);
13978 if_stmt
= begin_if_stmt ();
13979 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13980 current_in_charge_parm
,
13983 finish_expr_stmt (exprstmt
);
13984 finish_then_clause (if_stmt
);
13985 finish_if_stmt (if_stmt
);
13988 if (targetm
.cxx
.cdtor_returns_this ())
13992 val
= DECL_ARGUMENTS (current_function_decl
);
13993 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13994 DECL_RESULT (current_function_decl
), val
);
13995 /* Return the address of the object. */
13996 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13997 add_stmt (exprstmt
);
14001 /* Do the necessary processing for the beginning of a function body, which
14002 in this case includes member-initializers, but not the catch clauses of
14003 a function-try-block. Currently, this means opening a binding level
14004 for the member-initializers (in a ctor), member cleanups (in a dtor),
14005 and capture proxies (in a lambda operator()). */
14008 begin_function_body (void)
14012 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
14015 if (processing_template_decl
)
14016 /* Do nothing now. */;
14018 /* Always keep the BLOCK node associated with the outermost pair of
14019 curly braces of a function. These are needed for correct
14020 operation of dwarfout.c. */
14021 keep_next_level (true);
14023 stmt
= begin_compound_stmt (BCS_FN_BODY
);
14025 if (processing_template_decl
)
14026 /* Do nothing now. */;
14027 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14028 begin_destructor_body ();
14033 /* Do the processing for the end of a function body. Currently, this means
14034 closing out the cleanups for fully-constructed bases and members, and in
14035 the case of the destructor, deleting the object if desired. Again, this
14036 is only meaningful for [cd]tors, since they are the only functions where
14037 there is a significant distinction between the main body and any
14038 function catch clauses. Handling, say, main() return semantics here
14039 would be wrong, as flowing off the end of a function catch clause for
14040 main() would also need to return 0. */
14043 finish_function_body (tree compstmt
)
14045 if (compstmt
== NULL_TREE
)
14048 /* Close the block. */
14049 finish_compound_stmt (compstmt
);
14051 if (processing_template_decl
)
14052 /* Do nothing now. */;
14053 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
14054 finish_constructor_body ();
14055 else if (DECL_DESTRUCTOR_P (current_function_decl
))
14056 finish_destructor_body ();
14059 /* Given a function, returns the BLOCK corresponding to the outermost level
14060 of curly braces, skipping the artificial block created for constructor
14064 outer_curly_brace_block (tree fndecl
)
14066 tree block
= DECL_INITIAL (fndecl
);
14067 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14069 block
= BLOCK_SUBBLOCKS (block
);
14070 if (BLOCK_OUTER_CURLY_BRACE_P (block
))
14072 block
= BLOCK_SUBBLOCKS (block
);
14073 gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block
));
14077 /* If FNDECL is a class's key method, add the class to the list of
14078 keyed classes that should be emitted. */
14081 record_key_method_defined (tree fndecl
)
14083 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
14084 && DECL_VIRTUAL_P (fndecl
)
14085 && !processing_template_decl
)
14087 tree fnclass
= DECL_CONTEXT (fndecl
);
14088 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
14089 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
14093 /* Subroutine of finish_function.
14094 Save the body of constexpr functions for possible
14095 future compile time evaluation. */
14098 maybe_save_function_definition (tree fun
)
14100 if (!processing_template_decl
14101 && DECL_DECLARED_CONSTEXPR_P (fun
)
14102 && !cp_function_chain
->invalid_constexpr
14103 && !DECL_CLONED_FUNCTION_P (fun
))
14104 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
14107 /* Finish up a function declaration and compile that function
14108 all the way to assembler language output. The free the storage
14109 for the function definition.
14111 FLAGS is a bitwise or of the following values:
14113 We just finished processing the body of an in-class inline
14114 function definition. (This processing will have taken place
14115 after the class definition is complete.) */
14118 finish_function (int flags
)
14120 tree fndecl
= current_function_decl
;
14121 tree fntype
, ctype
= NULL_TREE
;
14122 int inclass_inline
= (flags
& 2) != 0;
14124 /* When we get some parse errors, we can end up without a
14125 current_function_decl, so cope. */
14126 if (fndecl
== NULL_TREE
)
14127 return error_mark_node
;
14129 if (c_dialect_objc ())
14130 objc_finish_function ();
14132 gcc_assert (!defer_mark_used_calls
);
14133 defer_mark_used_calls
= true;
14135 record_key_method_defined (fndecl
);
14137 fntype
= TREE_TYPE (fndecl
);
14139 /* TREE_READONLY (fndecl) = 1;
14140 This caused &foo to be of type ptr-to-const-function
14141 which then got a warning when stored in a ptr-to-function variable. */
14143 gcc_assert (building_stmt_list_p ());
14144 /* The current function is being defined, so its DECL_INITIAL should
14145 be set, and unless there's a multiple definition, it should be
14146 error_mark_node. */
14147 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
14149 /* For a cloned function, we've already got all the code we need;
14150 there's no need to add any extra bits. */
14151 if (!DECL_CLONED_FUNCTION_P (fndecl
))
14153 /* Make it so that `main' always returns 0 by default. */
14154 if (DECL_MAIN_P (current_function_decl
))
14155 finish_return_stmt (integer_zero_node
);
14157 if (use_eh_spec_block (current_function_decl
))
14158 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
14159 (TREE_TYPE (current_function_decl
)),
14160 current_eh_spec_block
);
14163 /* If we're saving up tree structure, tie off the function now. */
14164 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
14166 if (fn_contains_cilk_spawn_p (cfun
) && !processing_template_decl
)
14167 cfun
->cilk_frame_decl
= insert_cilk_frame (fndecl
);
14169 finish_fname_decls ();
14171 /* If this function can't throw any exceptions, remember that. */
14172 if (!processing_template_decl
14173 && !cp_function_chain
->can_throw
14174 && !flag_non_call_exceptions
14175 && !decl_replaceable_p (fndecl
))
14176 TREE_NOTHROW (fndecl
) = 1;
14178 /* This must come after expand_function_end because cleanups might
14179 have declarations (from inline functions) that need to go into
14180 this function's blocks. */
14182 /* If the current binding level isn't the outermost binding level
14183 for this function, either there is a bug, or we have experienced
14184 syntax errors and the statement tree is malformed. */
14185 if (current_binding_level
->kind
!= sk_function_parms
)
14187 /* Make sure we have already experienced errors. */
14188 gcc_assert (errorcount
);
14190 /* Throw away the broken statement tree and extra binding
14192 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
14194 while (current_binding_level
->kind
!= sk_function_parms
)
14196 if (current_binding_level
->kind
== sk_class
)
14197 pop_nested_class ();
14199 poplevel (0, 0, 0);
14202 poplevel (1, 0, 1);
14204 /* Statements should always be full-expressions at the outermost set
14205 of curly braces for a function. */
14206 gcc_assert (stmts_are_full_exprs_p ());
14208 /* If there are no return statements in a function with auto return type,
14209 the return type is void. But if the declared type is something like
14210 auto*, this is an error. */
14211 if (!processing_template_decl
&& FNDECL_USED_AUTO (fndecl
)
14212 && TREE_TYPE (fntype
) == current_function_auto_return_pattern
)
14214 if (!is_auto (current_function_auto_return_pattern
)
14215 && !current_function_returns_value
&& !current_function_returns_null
)
14217 error ("no return statements in function returning %qT",
14218 current_function_auto_return_pattern
);
14219 inform (input_location
, "only plain %<auto%> return type can be "
14220 "deduced to %<void%>");
14222 apply_deduced_return_type (fndecl
, void_type_node
);
14223 fntype
= TREE_TYPE (fndecl
);
14226 /* Save constexpr function body before it gets munged by
14227 the NRV transformation. */
14228 maybe_save_function_definition (fndecl
);
14230 /* Set up the named return value optimization, if we can. Candidate
14231 variables are selected in check_return_expr. */
14232 if (current_function_return_value
)
14234 tree r
= current_function_return_value
;
14237 if (r
!= error_mark_node
14238 /* This is only worth doing for fns that return in memory--and
14239 simpler, since we don't have to worry about promoted modes. */
14240 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
14241 /* Only allow this for variables declared in the outer scope of
14242 the function so we know that their lifetime always ends with a
14243 return; see g++.dg/opt/nrv6.C. We could be more flexible if
14244 we were to do this optimization in tree-ssa. */
14245 && (outer
= outer_curly_brace_block (fndecl
))
14246 && chain_member (r
, BLOCK_VARS (outer
)))
14247 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
14249 current_function_return_value
= NULL_TREE
;
14252 /* Remember that we were in class scope. */
14253 if (current_class_name
)
14254 ctype
= current_class_type
;
14256 /* Must mark the RESULT_DECL as being in this function. */
14257 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
14259 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14260 to the FUNCTION_DECL node itself. */
14261 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
14263 /* Save away current state, if appropriate. */
14264 if (!processing_template_decl
)
14265 save_function_data (fndecl
);
14267 /* Complain if there's just no return statement. */
14268 if (warn_return_type
14269 && !VOID_TYPE_P (TREE_TYPE (fntype
))
14270 && !dependent_type_p (TREE_TYPE (fntype
))
14271 && !current_function_returns_value
&& !current_function_returns_null
14272 /* Don't complain if we abort or throw. */
14273 && !current_function_returns_abnormally
14274 /* Don't complain if there's an infinite loop. */
14275 && !current_function_infinite_loop
14276 /* Don't complain if we are declared noreturn. */
14277 && !TREE_THIS_VOLATILE (fndecl
)
14278 && !DECL_NAME (DECL_RESULT (fndecl
))
14279 && !TREE_NO_WARNING (fndecl
)
14280 /* Structor return values (if any) are set by the compiler. */
14281 && !DECL_CONSTRUCTOR_P (fndecl
)
14282 && !DECL_DESTRUCTOR_P (fndecl
)
14283 && targetm
.warn_func_return (fndecl
))
14285 warning (OPT_Wreturn_type
,
14286 "no return statement in function returning non-void");
14287 TREE_NO_WARNING (fndecl
) = 1;
14290 /* Store the end of the function, so that we get good line number
14291 info for the epilogue. */
14292 cfun
->function_end_locus
= input_location
;
14294 /* Complain about parameters that are only set, but never otherwise used. */
14295 if (warn_unused_but_set_parameter
14296 && !processing_template_decl
14297 && errorcount
== unused_but_set_errorcount
14298 && !DECL_CLONED_FUNCTION_P (fndecl
))
14302 for (decl
= DECL_ARGUMENTS (fndecl
);
14304 decl
= DECL_CHAIN (decl
))
14305 if (TREE_USED (decl
)
14306 && TREE_CODE (decl
) == PARM_DECL
14307 && !DECL_READ_P (decl
)
14308 && DECL_NAME (decl
)
14309 && !DECL_ARTIFICIAL (decl
)
14310 && !TREE_NO_WARNING (decl
)
14311 && !DECL_IN_SYSTEM_HEADER (decl
)
14312 && TREE_TYPE (decl
) != error_mark_node
14313 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
14314 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
14315 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
14316 warning (OPT_Wunused_but_set_parameter
,
14317 "parameter %q+D set but not used", decl
);
14318 unused_but_set_errorcount
= errorcount
;
14321 /* Complain about locally defined typedefs that are not used in this
14323 maybe_warn_unused_local_typedefs ();
14325 /* Genericize before inlining. */
14326 if (!processing_template_decl
)
14328 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
14329 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
14330 cp_genericize (fndecl
);
14331 /* Clear out the bits we don't need. */
14332 f
->x_current_class_ptr
= NULL
;
14333 f
->x_current_class_ref
= NULL
;
14334 f
->x_eh_spec_block
= NULL
;
14335 f
->x_in_charge_parm
= NULL
;
14336 f
->x_vtt_parm
= NULL
;
14337 f
->x_return_value
= NULL
;
14338 f
->bindings
= NULL
;
14339 f
->extern_decl_map
= NULL
;
14340 f
->infinite_loops
= NULL
;
14342 /* Clear out the bits we don't need. */
14343 local_names
= NULL
;
14345 /* We're leaving the context of this function, so zap cfun. It's still in
14346 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
14348 current_function_decl
= NULL
;
14350 /* If this is an in-class inline definition, we may have to pop the
14351 bindings for the template parameters that we added in
14352 maybe_begin_member_template_processing when start_function was
14354 if (inclass_inline
)
14355 maybe_end_member_template_processing ();
14357 /* Leave the scope of the class. */
14359 pop_nested_class ();
14364 current_function_decl
= NULL_TREE
;
14366 defer_mark_used_calls
= false;
14367 if (deferred_mark_used_calls
)
14372 FOR_EACH_VEC_SAFE_ELT (deferred_mark_used_calls
, i
, decl
)
14374 vec_free (deferred_mark_used_calls
);
14377 invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION
, fndecl
);
14381 /* Create the FUNCTION_DECL for a function definition.
14382 DECLSPECS and DECLARATOR are the parts of the declaration;
14383 they describe the return type and the name of the function,
14384 but twisted together in a fashion that parallels the syntax of C.
14386 This function creates a binding context for the function body
14387 as well as setting up the FUNCTION_DECL in current_function_decl.
14389 Returns a FUNCTION_DECL on success.
14391 If the DECLARATOR is not suitable for a function (it defines a datum
14392 instead), we return 0, which tells yyparse to report a parse error.
14394 May return void_type_node indicating that this method is actually
14395 a friend. See grokfield for more details.
14397 Came here with a `.pushlevel' .
14399 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14400 CHANGES TO CODE IN `grokfield'. */
14403 grokmethod (cp_decl_specifier_seq
*declspecs
,
14404 const cp_declarator
*declarator
, tree attrlist
)
14406 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
14409 if (fndecl
== error_mark_node
)
14410 return error_mark_node
;
14412 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
14414 error ("invalid member function declaration");
14415 return error_mark_node
;
14419 cplus_decl_attributes (&fndecl
, attrlist
, 0);
14421 /* Pass friends other than inline friend functions back. */
14422 if (fndecl
== void_type_node
)
14425 if (DECL_IN_AGGR_P (fndecl
))
14427 if (DECL_CLASS_SCOPE_P (fndecl
))
14428 error ("%qD is already defined in class %qT", fndecl
,
14429 DECL_CONTEXT (fndecl
));
14430 return error_mark_node
;
14433 check_template_shadow (fndecl
);
14435 if (TREE_PUBLIC (fndecl
))
14436 DECL_COMDAT (fndecl
) = 1;
14437 DECL_DECLARED_INLINE_P (fndecl
) = 1;
14438 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
14440 /* We process method specializations in finish_struct_1. */
14441 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
14443 fndecl
= push_template_decl (fndecl
);
14444 if (fndecl
== error_mark_node
)
14448 if (! DECL_FRIEND_P (fndecl
))
14450 if (DECL_CHAIN (fndecl
))
14452 fndecl
= copy_node (fndecl
);
14453 TREE_CHAIN (fndecl
) = NULL_TREE
;
14457 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
14459 DECL_IN_AGGR_P (fndecl
) = 1;
14464 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
14465 we can lay it out later, when and if its type becomes complete.
14467 Also handle constexpr variables where the initializer involves
14468 an unlowered PTRMEM_CST because the class isn't complete yet. */
14471 maybe_register_incomplete_var (tree var
)
14473 gcc_assert (VAR_P (var
));
14475 /* Keep track of variables with incomplete types. */
14476 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
14477 && DECL_EXTERNAL (var
))
14479 tree inner_type
= TREE_TYPE (var
);
14481 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
14482 inner_type
= TREE_TYPE (inner_type
);
14483 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
14485 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
14486 /* RTTI TD entries are created while defining the type_info. */
14487 || (TYPE_LANG_SPECIFIC (inner_type
)
14488 && TYPE_BEING_DEFINED (inner_type
)))
14490 incomplete_var iv
= {var
, inner_type
};
14491 vec_safe_push (incomplete_vars
, iv
);
14493 else if (!(DECL_LANG_SPECIFIC (var
) && DECL_TEMPLATE_INFO (var
))
14494 && decl_constant_var_p (var
)
14495 && (TYPE_PTRMEM_P (inner_type
) || CLASS_TYPE_P (inner_type
)))
14497 /* When the outermost open class is complete we can resolve any
14498 pointers-to-members. */
14499 tree context
= outermost_open_class ();
14500 incomplete_var iv
= {var
, context
};
14501 vec_safe_push (incomplete_vars
, iv
);
14506 /* Called when a class type (given by TYPE) is defined. If there are
14507 any existing VAR_DECLs whose type has been completed by this
14508 declaration, update them now. */
14511 complete_vars (tree type
)
14514 incomplete_var
*iv
;
14516 for (ix
= 0; vec_safe_iterate (incomplete_vars
, ix
, &iv
); )
14518 if (same_type_p (type
, iv
->incomplete_type
))
14520 tree var
= iv
->decl
;
14521 tree type
= TREE_TYPE (var
);
14523 if (TYPE_MAIN_VARIANT (strip_array_types (type
))
14524 == iv
->incomplete_type
)
14526 /* Complete the type of the variable. The VAR_DECL itself
14527 will be laid out in expand_expr. */
14528 complete_type (type
);
14529 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
14532 if (DECL_INITIAL (var
)
14533 && decl_constant_var_p (var
))
14534 DECL_INITIAL (var
) = cplus_expand_constant (DECL_INITIAL (var
));
14536 /* Remove this entry from the list. */
14537 incomplete_vars
->unordered_remove (ix
);
14543 /* Check for pending declarations which may have abstract type. */
14544 complete_type_check_abstract (type
);
14547 /* If DECL is of a type which needs a cleanup, build and return an
14548 expression to perform that cleanup here. Return NULL_TREE if no
14549 cleanup need be done. */
14552 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
14558 /* Assume no cleanup is required. */
14559 cleanup
= NULL_TREE
;
14561 if (error_operand_p (decl
))
14564 /* Handle "__attribute__((cleanup))". We run the cleanup function
14565 before the destructor since the destructor is what actually
14566 terminates the lifetime of the object. */
14567 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
14574 /* Get the name specified by the user for the cleanup function. */
14575 id
= TREE_VALUE (TREE_VALUE (attr
));
14576 /* Look up the name to find the cleanup function to call. It is
14577 important to use lookup_name here because that is what is
14578 used in c-common.c:handle_cleanup_attribute when performing
14579 initial checks on the attribute. Note that those checks
14580 include ensuring that the function found is not an overloaded
14581 function, or an object with an overloaded call operator,
14582 etc.; we can rely on the fact that the function found is an
14583 ordinary FUNCTION_DECL. */
14584 fn
= lookup_name (id
);
14585 arg
= build_address (decl
);
14586 if (!mark_used (decl
, complain
) && !(complain
& tf_error
))
14587 return error_mark_node
;
14588 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
14589 if (cleanup
== error_mark_node
)
14590 return error_mark_node
;
14592 /* Handle ordinary C++ destructors. */
14593 type
= TREE_TYPE (decl
);
14594 if (type_build_dtor_call (type
))
14596 int flags
= LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
;
14600 if (TREE_CODE (type
) == ARRAY_TYPE
)
14603 addr
= build_address (decl
);
14605 call
= build_delete (TREE_TYPE (addr
), addr
,
14606 sfk_complete_destructor
, flags
, 0, complain
);
14607 if (call
== error_mark_node
)
14608 cleanup
= error_mark_node
;
14609 else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
14610 /* Discard the call. */;
14612 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
14617 /* build_delete sets the location of the destructor call to the
14618 current location, even though the destructor is going to be
14619 called later, at the end of the current scope. This can lead to
14620 a "jumpy" behaviour for users of debuggers when they step around
14621 the end of the block. So let's unset the location of the
14622 destructor call instead. */
14623 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
14624 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
14627 && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl
)))
14628 /* Treat objects with destructors as used; the destructor may do
14629 something substantive. */
14630 && !mark_used (decl
, complain
) && !(complain
& tf_error
))
14631 return error_mark_node
;
14637 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
14638 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
14639 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
14642 static_fn_type (tree memfntype
)
14647 if (TYPE_PTRMEMFUNC_P (memfntype
))
14648 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
14649 if (POINTER_TYPE_P (memfntype
)
14650 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
14651 memfntype
= TREE_TYPE (memfntype
);
14652 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
14654 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
14655 args
= TYPE_ARG_TYPES (memfntype
);
14656 cp_ref_qualifier rqual
= type_memfn_rqual (memfntype
);
14657 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
14658 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
), rqual
);
14659 fntype
= (cp_build_type_attribute_variant
14660 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
14661 fntype
= (build_exception_variant
14662 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
14663 if (TYPE_HAS_LATE_RETURN_TYPE (memfntype
))
14664 TYPE_HAS_LATE_RETURN_TYPE (fntype
) = 1;
14668 /* DECL was originally constructed as a non-static member function,
14669 but turned out to be static. Update it accordingly. */
14672 revert_static_member_fn (tree decl
)
14674 tree stype
= static_fn_type (decl
);
14675 cp_cv_quals quals
= type_memfn_quals (stype
);
14676 cp_ref_qualifier rqual
= type_memfn_rqual (stype
);
14678 if (quals
!= TYPE_UNQUALIFIED
|| rqual
!= REF_QUAL_NONE
)
14679 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
, REF_QUAL_NONE
);
14681 TREE_TYPE (decl
) = stype
;
14683 if (DECL_ARGUMENTS (decl
))
14684 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
14685 DECL_STATIC_FUNCTION_P (decl
) = 1;
14688 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
14689 one of the language-independent trees. */
14691 enum cp_tree_node_structure_enum
14692 cp_tree_node_structure (union lang_tree_node
* t
)
14694 switch (TREE_CODE (&t
->generic
))
14696 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
14697 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
14698 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
14699 case OVERLOAD
: return TS_CP_OVERLOAD
;
14700 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
14701 case PTRMEM_CST
: return TS_CP_PTRMEM
;
14702 case BASELINK
: return TS_CP_BASELINK
;
14703 case TEMPLATE_DECL
: return TS_CP_TEMPLATE_DECL
;
14704 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
14705 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
14706 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
14707 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
14708 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
14709 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
14710 default: return TS_CP_GENERIC
;
14714 /* Build the void_list_node (void_type_node having been created). */
14716 build_void_list_node (void)
14718 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
14723 cp_missing_noreturn_ok_p (tree decl
)
14725 /* A missing noreturn is ok for the `main' function. */
14726 return DECL_MAIN_P (decl
);
14729 /* Return the decl used to identify the COMDAT group into which DECL should
14733 cxx_comdat_group (tree decl
)
14735 /* Virtual tables, construction virtual tables, and virtual table
14736 tables all go in a single COMDAT group, named after the primary
14738 if (VAR_P (decl
) && DECL_VTABLE_OR_VTT_P (decl
))
14739 decl
= CLASSTYPE_VTABLES (DECL_CONTEXT (decl
));
14740 /* For all other DECLs, the COMDAT group is the mangled name of the
14741 declaration itself. */
14744 while (DECL_THUNK_P (decl
))
14746 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
14747 into the same section as the target function. In that case
14748 we must return target's name. */
14749 tree target
= THUNK_TARGET (decl
);
14750 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
14751 && DECL_SECTION_NAME (target
) != NULL
14752 && DECL_ONE_ONLY (target
))
14762 /* Returns the return type for FN as written by the user, which may include
14763 a placeholder for a deduced return type. */
14766 fndecl_declared_return_type (tree fn
)
14768 fn
= STRIP_TEMPLATE (fn
);
14769 if (FNDECL_USED_AUTO (fn
))
14771 struct language_function
*f
= NULL
;
14772 if (DECL_STRUCT_FUNCTION (fn
))
14773 f
= DECL_STRUCT_FUNCTION (fn
)->language
;
14775 f
= DECL_SAVED_FUNCTION_DATA (fn
);
14776 return f
->x_auto_return_pattern
;
14778 return TREE_TYPE (TREE_TYPE (fn
));
14781 /* Returns true iff DECL was declared with an auto return type and it has
14782 not yet been deduced to a real type. */
14785 undeduced_auto_decl (tree decl
)
14787 if (cxx_dialect
< cxx14
)
14789 return type_uses_auto (TREE_TYPE (decl
));
14792 /* Complain if DECL has an undeduced return type. */
14795 require_deduced_type (tree decl
)
14797 if (undeduced_auto_decl (decl
))
14798 error ("use of %qD before deduction of %<auto%>", decl
);
14801 #include "gt-cp-decl.h"